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\"./src/index.js\");\n","\nimport { Extension } from \"../../src/application/Extension\";\nimport { TOOL_CHANGE_EVENT, NAVIGATION_MODE_CHANGED_EVENT, CAMERA_CHANGE_EVENT } from \"../../src/application/EventTypes\";\nimport { TOOLBAR } from \"../../src/gui/GuiViewerToolbarConst\";\nimport { ComboButton } from \"../../src/gui/controls/ComboButton\";\nimport { Button } from \"../../src/gui/controls/Button\";\nimport { FovTool } from \"../../src/tools/FovTool\";\nimport { WorldUpTool } from \"../../src/tools/WorldUpTool\";\nimport { i18n } from \"../../src/globalization/i18next\";\nimport { RadioButtonGroup } from \"../../src/gui/controls/RadioButtonGroup\";\nimport { isTouchDevice } from \"../../src/compat\";\nimport { HudMessage } from \"../../src/gui/HudMessage\";\n\n\nvar MODE_PAN = 'pan';\nvar MODE_DOLLY = 'dolly';\nvar MODE_FREE_ORBIT = 'freeorbit';\nvar MODE_ORBIT = 'orbit';\nvar MODE_FOV = 'fov'; // it's actually just an action.\nvar MODE_WORLD_UP = 'worldup';\nvar MODE_FIT_TO_VIEW = 'fittoview';\n\n/**\n                                     * Adds toolbar buttons to Orbit, Pan and Dolly.\n                                     * It also adds camera interaction buttons for Fit to View, Focal Length and Roll \n                                     * \n                                     * The extension id is: `Autodesk.DefaultTools.NavTools`\n                                     * \n                                     * @example\n                                     *   viewer.loadExtension('Autodesk.DefaultTools.NavTools')\n                                     * \n                                     * @memberof Autodesk.Viewing.Extensions\n                                     * @alias Autodesk.Viewing.Extensions.NavToolsExtension\n                                     * @see {@link Autodesk.Viewing.Extension} for common inherited methods.\n                                     * @constructor\n                                     */\nexport function NavToolsExtension(viewer, options) {\n  Extension.call(this, viewer, options);\n  this.name = 'navtools';\n  this.modes = [MODE_PAN, MODE_DOLLY, MODE_FREE_ORBIT, MODE_ORBIT, MODE_FOV, MODE_WORLD_UP, MODE_FIT_TO_VIEW];\n  this.onToolChanged = this.onToolChanged.bind(this);\n  this.onNavigationModeChanged = this.onNavigationModeChanged.bind(this);\n  this.navToolsConfig = options.navToolsConfig || {};\n}\n\nNavToolsExtension.prototype = Object.create(Extension.prototype);\nNavToolsExtension.prototype.constructor = NavToolsExtension;\n\nvar proto = NavToolsExtension.prototype;\n\nfunction createNavToggler(self, button, mode) {\n  return function () {\n    if (self.isActive(mode)) {\n      self.deactivate();\n    } else {\n      self.activate(mode);\n    }\n  };\n}\n\nproto.load = function () {\n  var viewer = this.viewer;\n\n  // Register tools\n  var fovtool = new FovTool(viewer);\n  viewer.toolController.registerTool(fovtool);\n\n  if (!this.navToolsConfig.isAECCameraControls) {\n    var rolltool = new WorldUpTool(viewer.impl, viewer);\n    viewer.toolController.registerTool(rolltool);\n  }\n\n  this.initFocalLengthOverlay();\n\n  viewer.addEventListener(TOOL_CHANGE_EVENT, this.onToolChanged);\n  viewer.addEventListener(NAVIGATION_MODE_CHANGED_EVENT, this.onNavigationModeChanged);\n\n  return true;\n};\n\n// Ensure that toolbar is properly configured for 2d/3d\nproto.updateUI = function (is3d) {\n  if (is3d !== this.is3d) {\n    this._destroyUI();\n    this._createUI(is3d);\n  }\n};\n\nproto.onToolbarCreated = function (toolbar) {\n  var is3d = !this.viewer.impl.is2d;\n  this._createUI(is3d);\n};\n\nproto.navActionDisplayMode = function (action) {\n  return this.viewer.navigation.isActionEnabled(action) ? 'block' : 'none';\n};\n\nproto._createUI = function (is3d)\n{\n  // Adds the UI for the default navigation tools (orbit, pan, dolly, camera controls)\n  var viewer = this.viewer;\n  var toolbar = viewer.getToolbar();\n  var navTools = toolbar.getControl(TOOLBAR.NAVTOOLSID);\n\n  if (is3d) {\n    var orbitToolsButton = new ComboButton('toolbar-orbitTools');\n    orbitToolsButton.setToolTip('Orbit');\n    orbitToolsButton.setIcon(\"adsk-icon-orbit-constrained\");\n    orbitToolsButton.setDisplay(this.navActionDisplayMode('orbit'));\n\n    this.createOrbitSubmenu(orbitToolsButton);\n\n    navTools.addControl(orbitToolsButton);\n    navTools.orbittoolsbutton = orbitToolsButton;\n    orbitToolsButton.setState(Button.State.ACTIVE);\n\n    navTools.returnToDefault = function () {\n      orbitToolsButton.setState(Button.State.ACTIVE);\n    };\n  }\n\n  var panButton = new Button('toolbar-panTool');\n  panButton.setToolTip('Pan');\n  panButton.setIcon(\"adsk-icon-pan\");\n  panButton.onClick = createNavToggler(this, panButton, MODE_PAN);\n  panButton.setDisplay(this.navActionDisplayMode('pan'));\n\n  navTools.addControl(panButton);\n  navTools.panbutton = panButton;\n\n  if (!is3d) {\n    navTools.returnToDefault = function () {\n      panButton.setState(Button.State.ACTIVE);\n    };\n    navTools.returnToDefault(); // Assume 'pan' is the default navigation tool.\n  }\n\n  var dollyButton = new Button('toolbar-zoomTool');\n  dollyButton.setToolTip('Zoom');\n  dollyButton.setIcon(\"adsk-icon-zoom\");\n  dollyButton.onClick = createNavToggler(this, dollyButton, MODE_DOLLY);\n  dollyButton.setDisplay(this.navActionDisplayMode('zoom'));\n\n  navTools.addControl(dollyButton);\n  navTools.dollybutton = dollyButton;\n\n  if (this.navToolsConfig.isAECCameraControls) {\n    // AEC applications such as Docs and Design Collaboration only have a need for Fit to View\n    navTools.addControl(this.createFitViewButton(navTools));\n  } else {\n    var cameraButton = new ComboButton('toolbar-cameraSubmenuTool');\n    cameraButton.setToolTip('Camera interactions');\n    cameraButton.setIcon(\"adsk-icon-camera\");\n    cameraButton.saveAsDefault();\n    this.createCameraSubmenu(cameraButton, is3d);\n    navTools.addControl(cameraButton);\n    navTools.camerabutton = cameraButton;\n  }\n\n  // remember if we initialized for 3d or 2d\n  this.is3d = is3d;\n};\n\nproto.createOrbitSubmenu = function (parentButton) {\n  var viewer = this.viewer;\n  var toolbar = viewer.getToolbar();\n  var navTools = toolbar.getControl(TOOLBAR.NAVTOOLSID);\n\n  var freeOrbitButton = new Button('toolbar-freeOrbitTool');\n  freeOrbitButton.setToolTip('Free orbit');\n  freeOrbitButton.setIcon(\"adsk-icon-orbit-free\");\n  freeOrbitButton.onClick = createNavToggler(this, freeOrbitButton, MODE_FREE_ORBIT);\n\n  parentButton.addControl(freeOrbitButton);\n  navTools.freeorbitbutton = freeOrbitButton;\n\n  var orbitButton = new Button('toolbar-orbitTool');\n  orbitButton.setToolTip('Orbit');\n  orbitButton.setIcon(\"adsk-icon-orbit-constrained\");\n  orbitButton.onClick = createNavToggler(this, orbitButton, MODE_ORBIT);\n\n  parentButton.addControl(orbitButton);\n  navTools.orbitbutton = orbitButton;\n\n  parentButton.onClick = orbitButton.onClick; // default\n\n};\n\nproto.createFitViewButton = function (navTools, parentButton) {\n  //options = { defaultTooltipValue : \"Fit to view (F)\" };\n  var viewer = this.viewer;\n  var fitToViewButton = new Button('toolbar-fitToViewTool');\n  fitToViewButton.setToolTip('Fit to view');\n  fitToViewButton.setIcon(\"adsk-icon-fit-to-view\");\n  fitToViewButton.onClick = function (e) {\n    viewer.impl.fitToView(viewer.impl.selector.getAggregateSelection());\n    var analytics = Autodesk.Viewing.Private.analytics;\n    analytics.track('viewer.fit_to_view', {\n      from: 'UI' });\n\n    var defaultNavToolName = viewer.getDefaultNavigationToolName();\n    viewer.setActiveNavigationTool(defaultNavToolName);\n    parentButton && parentButton.restoreDefault();\n  };\n  fitToViewButton.setDisplay(this.navActionDisplayMode('gotoview'));\n\n  navTools.fittoviewbutton = fitToViewButton;\n\n  return fitToViewButton;\n};\n\nproto.createCameraSubmenu = function (parentButton, is3d)\n{\n  var self = this;\n  var viewer = this.viewer;\n  var toolbar = viewer.getToolbar();\n  var navTools = toolbar.getControl(TOOLBAR.NAVTOOLSID);\n\n  if (isTouchDevice()) {\n    var homeButton = new Button('toolbar-homeTool');\n    homeButton.setToolTip('Home');\n    homeButton.setIcon(\"adsk-icon-home\");\n    homeButton.onClick = function () {\n      viewer.navigation.setRequestHomeView(true);\n      var defaultNavToolName = viewer.getDefaultNavigationToolName();\n      self.activate(defaultNavToolName);\n      parentButton.restoreDefault();\n    };\n    homeButton.setDisplay(this.navActionDisplayMode('gotoview'));\n\n    parentButton.addControl(homeButton);\n    navTools.homebutton = homeButton;\n  }\n\n  parentButton.addControl(this.createFitViewButton(navTools, parentButton));\n\n  if (is3d) {\n    //options.defaultTooltipValue = \"Focal length (Ctrl+Shift drag)\";\n    var fovButton = new Button('toolbar-focalLengthTool');\n    fovButton.setToolTip('Focal length');\n    fovButton.setIcon(\"adsk-icon-fov\");\n    fovButton.onClick = createNavToggler(this, fovButton, MODE_FOV);\n    fovButton.setDisplay(this.navActionDisplayMode('fov'));\n\n    parentButton.addControl(fovButton);\n    navTools.fovbutton = fovButton;\n  }\n\n  //options.defaultTooltipValue = \"Roll (Alt+Shift drag)\";\n  var rollButton = new Button('toolbar-rollTool');\n  rollButton.setToolTip('Roll');\n  rollButton.setIcon(\"adsk-icon-roll\");\n  rollButton.onClick = createNavToggler(this, rollButton, MODE_WORLD_UP);\n  rollButton.setDisplay(this.navActionDisplayMode('roll'));\n\n  parentButton.addControl(rollButton);\n  navTools.rollbutton = rollButton;\n};\n\nproto.onToolChanged = function (event) {\n\n  if (event.toolName === \"fov\") {\n    this.showFocalLengthOverlay(event.active);\n  }\n\n  // Special case for ALT-drag-release\n  if (event.active) {\n    switch (event.toolName) {\n      case \"dolly\":\n        this.handleAltRelease('dollybutton');\n        break;\n      case \"pan\":\n        this.handleAltRelease('panbutton');\n        break;\n      case \"worldup\":\n        this.handleAltRelease('rollbutton');\n        break;\n      case \"fov\":\n        this.handleAltRelease('fovbutton');\n        break;}\n\n  }\n};\n\nproto.onNavigationModeChanged = function (event) {\n  var defaultNavToolName = this.viewer.getDefaultNavigationToolName();\n  if (defaultNavToolName === event.id) {\n    var toolbar = this.viewer.getToolbar();\n    if (!toolbar)\n    return;\n    var navTools = toolbar.getControl(TOOLBAR.NAVTOOLSID);\n    if (!navTools)\n    return;\n    navTools.returnToDefault && navTools.returnToDefault();\n  }\n};\n\nproto.handleAltRelease = function (buttonName) {\n  var toolbar = this.viewer.getToolbar();\n  if (!toolbar)\n  return;\n  var navTools = toolbar.getControl(TOOLBAR.NAVTOOLSID);\n  var button = navTools && navTools[buttonName];\n  button && button.setState(Button.State.ACTIVE);\n};\n\nproto.initFocalLengthOverlay = function () {\n\n  var _document = this.getDocument();\n  var container = this.focallength = _document.createElement(\"div\");\n\n  container.classList.add(\"message-panel\");\n  container.classList.add(\"docking-panel\");\n  container.classList.add(\"focal-length\");\n  container.classList.add(\"docking-panel-container-solid-color-b\");\n\n  var table = _document.createElement(\"table\");\n  var tbody = _document.createElement(\"tbody\");\n  table.appendChild(tbody);\n\n  container.appendChild(table);\n  this.viewer.container.appendChild(container);\n\n  var row = tbody.insertRow(-1);\n  var cell = row.insertCell(0);\n  cell.classList.add(\"name\");\n  cell.setAttribute(\"data-i18n\", \"Focal Length\");\n  cell.textContent = i18n.translate(\"Focal Length\");\n\n  cell = row.insertCell(1);\n  cell.classList.add(\"value\");\n  cell.textContent = '';\n  this.fovCell = cell;\n\n  container.style.visibility = \"hidden\";\n};\n\nproto.showFocalLengthOverlay = function (state) {\n  var self = this;\n  var viewer = this.viewer;\n  var myFocalLength = 0;\n\n  function showFovHudMessage(yes) {\n    if (yes) {\n      // Display a hud messages.\n      var messageSpecs = {\n        \"msgTitleKey\": \"Orthographic View Set\",\n        \"messageKey\": \"The view is set to Orthographic\",\n        \"messageDefaultValue\": \"The view is set to Orthographic. Changing the focal length will switch to Perspective.\" };\n\n      HudMessage.displayMessage(viewer.container, messageSpecs);\n    } else\n    {\n      HudMessage.dismiss();\n    }\n  }\n\n  function showFov(yes) {\n    if (yes) updateFOV();\n\n    if (self.focallength)\n    self.focallength.style.visibility = yes ? \"visible\" : \"hidden\";\n  }\n\n  function updateFOV() {\n    var camFocalLength = viewer.getFocalLength();\n    if (myFocalLength !== camFocalLength)\n    {\n      myFocalLength = camFocalLength;\n      self.fovCell.textContent = camFocalLength.toString() + \" mm\";\n    }\n  }\n\n  function watchFOV(e) {\n    updateFOV();\n    // If camera changed to ORTHO and we are still in FOV mode\n    // put up the warning message that the system will switch to perspective.\n    //\n    if (viewer.toolController.getActiveToolName() === \"fov\") {\n      var camera = viewer.navigation.getCamera();\n      var isOrtho = camera && !camera.isPerspective;\n\n      showFov(!isOrtho);\n      showFovHudMessage(isOrtho);\n    }\n  }\n  var camera = viewer.navigation.getCamera();\n  var isOrtho = camera && !camera.isPerspective;\n\n  showFov(state && !isOrtho);\n  showFovHudMessage(state && isOrtho);\n\n  if (state) {\n    viewer.addEventListener(CAMERA_CHANGE_EVENT, watchFOV);\n  } else\n  {\n    viewer.removeEventListener(CAMERA_CHANGE_EVENT, watchFOV);\n  }\n};\n\nproto.unload = function () {\n  this._destroyUI();\n\n  return true;\n};\n\nproto._destroyUI = function () {\n  // Removes the UI created in createUI\n  var viewer = this.viewer;\n  var toolbar = viewer.getToolbar();\n\n  if (!toolbar) {\n    return true;\n  }\n\n  var navTools = toolbar.getControl(TOOLBAR.NAVTOOLSID);\n\n  if (!navTools) {\n    return true;\n  }\n\n  function destroyComboButton(button) {\n    if (button) {\n      button.subMenu.removeEventListener(RadioButtonGroup.Event.ACTIVE_BUTTON_CHANGED, button.subMenuActiveButtonChangedHandler(navTools));\n      navTools.removeControl(button.getId());\n      button.onClick = null;\n    }\n  }\n\n  function destroyButton(button) {\n    if (button) {\n      navTools.removeControl(button.getId());\n      button.onClick = null;\n    }\n  }\n\n  if (this.is3d) {\n    destroyComboButton(navTools.orbittoolsbutton);\n    navTools.orbittoolsbutton = null;\n\n    destroyButton(navTools.orbitbutton);\n    navTools.orbitbutton = null;\n\n    destroyButton(navTools.freeorbitbutton);\n    navTools.freeorbitbutton = null;\n\n    destroyButton(navTools.fovbutton);\n    navTools.fovbutton = null;\n  }\n\n  destroyButton(navTools.panbutton);\n  navTools.panbutton = null;\n\n  destroyButton(navTools.dollybutton);\n  navTools.dollybutton = null;\n\n  destroyComboButton(navTools.camerabutton);\n  navTools.camerabutton = null;\n\n  destroyButton(navTools.rollbutton);\n  navTools.rollbutton = null;\n\n  destroyButton(navTools.fittoviewbutton);\n  navTools.fittoviewbutton = null;\n\n  if (this.focallength) {\n    viewer.container.removeChild(this.focallength);\n    this.focallength = null;\n  }\n\n  // Remove Listeners\n  viewer.removeEventListener(TOOL_CHANGE_EVENT, this.toolChangedHandler);\n  this.toolChangedHandler = null;\n  viewer.removeEventListener(NAVIGATION_MODE_CHANGED_EVENT, this.navChangedHandler);\n  this.navChangedHandler = null;\n\n  return true;\n};\n\n/**\n    * Performs the corresponding button action.\n    * @param {string} mode - one of the supported modes, see getModes().\n    * \n    * @memberof Autodesk.Viewing.Extensions.NavToolsExtension\n    * @alias Autodesk.Viewing.Extensions.NavToolsExtension#activate\n    */\nproto.activate = function (mode) {\n  if (this.isActive(mode)) {\n    return false;\n  }\n  if (mode === MODE_FIT_TO_VIEW) {\n    this.viewer.impl.fitToView(this.viewer.impl.selector.getAggregateSelection());\n    return true;\n  }\n  if (this.modes.indexOf(mode) != -1) {\n    var defaultTool = this.viewer.getDefaultNavigationToolName();\n    // NOTE: Dirty Hack\n    // LMV-4998: Set the defaultTool to one of the NavTool if the default navigation tool is set by a different extension.\n    if (this.modes.indexOf(defaultTool) === -1) {\n      this.viewer.activateDefaultNavigationTools(this.viewer.model.is2d());\n    }\n    this.viewer.setActiveNavigationTool(mode);\n    return true;\n  }\n  return false;\n};\n\n/**\n    * Deactivates the current mode and activates the default viewer's navigation tool.\n    * @returns {bool} true when deactivation is successful.\n    * \n    * @memberof Autodesk.Viewing.Extensions.NavToolsExtension\n    * @alias Autodesk.Viewing.Extensions.NavToolsExtension#deactivate\n    */\nproto.deactivate = function () {\n  this.viewer.setActiveNavigationTool();\n  return true;\n};\n\n/**\n    * Checks whether a specific supported mode is currently active.\n    * \n    * @param {string} mode - one of the supported modes.\n    * @returns {bool} true is the mode queried is currently active.\n    * \n    * @memberof Autodesk.Viewing.Extensions.NavToolsExtension\n    * @alias Autodesk.Viewing.Extensions.NavToolsExtension#isActive\n    */\nproto.isActive = function (mode) {\n  var currMode = this.viewer.getActiveNavigationTool();\n  return currMode === mode;\n};","\nimport { Extension } from \"../../src/application/Extension\";\nimport { ExplodeTool } from './ExplodeTool';\nimport { isIOSDevice, isIE11, isAndroidDevice } from \"../../src/compat\";\nimport { Button } from \"../../src/gui/controls/Button\";\nimport { stringToDOM } from \"../../src/globals\";\nimport { logger } from \"../../src/logger/Logger\";\nimport { EXPLODE_CHANGE_EVENT } from \"../../src/application/EventTypes\";\n\nvar avp = Autodesk.Viewing.Private;\n\n/**\n                                     * \n                                     * \n                                     * Use its `activate()` method to enable the explode UI.\n                                     * \n                                     * The extension id is: `Autodesk.Explode`\n                                     * \n                                     * @example\n                                     *   viewer.loadExtension('Autodesk.Explode')\n                                     * \n                                     * @memberof Autodesk.Viewing.Extensions\n                                     * @alias Autodesk.Viewing.Extensions.ExplodeExtension\n                                     * @see {@link Autodesk.Viewing.Extension} for common inherited methods.\n                                     * @constructor\n                                     */\nexport function ExplodeExtension(viewer, options) {\n  Extension.call(this, viewer, options);\n  this.viewer = viewer;\n  this.options = options;\n  this.name = \"explode\";\n\n  this.deactivate = this.deactivate.bind(this);\n  this._onExplode = this._onExplode.bind(this);\n\n  this.tool = null;\n\n  // these below are all assinged in _createUI()\n  this._slider = null;\n  this._explodeButton = null;\n  this._explodeSubmenu = null;\n  this._tooltip = null;\n}\nExplodeExtension.prototype = Object.create(Extension.prototype);\nExplodeExtension.prototype.constructor = ExplodeExtension;\n\nvar proto = ExplodeExtension.prototype;\n\n/**\n                                         * Adds an explode button to the toolbar. When pressed, a slider\n                                         * will be shown which allows changing the model's explosion value.\n                                         * \n                                         * @memberof Autodesk.Viewing.Extensions.ExplodeExtension\n                                         * @alias Autodesk.Viewing.Extensions.ExplodeExtension#load\n                                         */\nproto.load = function () {\n  this.tool = new ExplodeTool(this.viewer);\n  this.viewer.toolController.registerTool(this.tool, this.setActive.bind(this));\n  // No matter whether the UI initializes, the extension always loads.\n  return true;\n};\n\n/**\n    * Removes the explode button from the toolbar and deactivates the explode state.\n    * \n    * @memberof Autodesk.Viewing.Extensions.ExplodeExtension\n    * @alias Autodesk.Viewing.Extensions.ExplodeExtension#unload\n    */\nproto.unload = function () {\n\n  this.deactivate();\n  _destroyUI(this);\n\n  this.viewer.toolController.deregisterTool(this.tool);\n  this.tool = null;\n\n  return true;\n};\n\n/**\n    * Invoked by the viewer when the toolbar UI is available.\n    *\n    * @param {Autodesk.Viewing.UI.ToolBar} toolbar - toolbar instance.\n    *\n    * @alias Autodesk.Viewing.Extensions.ExplodeExtension#onToolbarCreated\n    */\nproto.onToolbarCreated = function (toolbar) {\n  _createUI(this, toolbar);\n};\n\n/**\n    * Displays the explode UI.\n    * \n    * @memberof Autodesk.Viewing.Extensions.ExplodeExtension\n    * @alias Autodesk.Viewing.Extensions.ExplodeExtension#activate\n    */\nproto.activate = function () {\n  if (this.isActive())\n  return true;\n\n  if (!this._explodeSubmenu)\n  return false;\n\n  this._explodeSubmenu.style.display = \"\";\n  this._explodeButton.setState(Button.State.ACTIVE);\n  this._tooltip.style.display = \"none\";\n\n  // Sync slider with viewer's explode value\n  var lmvExplodeValue = this.viewer.impl.getExplodeScale();\n  this._slider.value = lmvExplodeValue;\n\n  this.viewer.toolController.activateTool(\"explode\");\n\n  // Update UI only when the event is fired\n  this.viewer.addEventListener(EXPLODE_CHANGE_EVENT, this._onExplode);\n\n  return true;\n};\n\n/**\n    * Hides the explode UI and resets explode slider.\n    * \n    * @memberof Autodesk.Viewing.Extensions.ExplodeExtension\n    * @alias Autodesk.Viewing.Extensions.ExplodeExtension#deactivate\n    */\nproto.deactivate = function () {\n  if (!this.isActive())\n  return true;\n\n  if (!this._explodeSubmenu)\n  return true;\n\n  this._explodeButton.setState(Button.State.INACTIVE);\n  _hideSlider(this);\n\n  this.viewer.toolController.deactivateTool(\"explode\"); // Resets the UI slider via event handler.\n\n  // Update UI only when the event is fired\n  this.viewer.removeEventListener(EXPLODE_CHANGE_EVENT, this._onExplode);\n\n  return true;\n};\n\n/**\n    * @returns {boolean} true is the explode UI is visible.\n    *\n    * @memberof Autodesk.Viewing.Extensions.ExplodeExtension\n    * @alias Autodesk.Viewing.Extensions.ExplodeExtension#isActive\n    */\nproto.isActive = function () {\n  if (!this._explodeSubmenu)\n  return false;\n  return this._explodeSubmenu.style.display !== 'none';\n};\n\n/**\n    * @returns {number} Between 0 and 1.\n    *\n    * @memberof Autodesk.Viewing.Extensions.ExplodeExtension\n    * @alias Autodesk.Viewing.Extensions.ExplodeExtension#getScale\n    */\nproto.getScale = function () {\n  return this.viewer.getExplodeScale();\n};\n\n/**\n    * Applies an explode operation.\n    *\n    * @param {number} value - Between 0 and 1.\n    *\n    * @memberof Autodesk.Viewing.Extensions.ExplodeExtension\n    * @alias Autodesk.Viewing.Extensions.ExplodeExtension#setScale\n    */\nproto.setScale = function (value) {\n  return this.tool.setScale(value);\n};\n\n/**\n    * Specifies the algorithm used for exploding models.\n    * \n    * @param {string} strategy - Either 'hierarchy' or 'radial'.\n    *\n    * @memberof Autodesk.Viewing.Extensions.ExplodeExtension\n    * @alias Autodesk.Viewing.Extensions.ExplodeExtension#setStrategy\n    */\nproto.setStrategy = function (strategy) {\n  if (strategy !== this.getStrategy()) {\n    this.viewer.prefs.set(avp.Prefs3D.EXPLODE_STRATEGY, strategy);\n  }\n};\n\n/**\n    * Returns an identifier for the algorithm used for exploding models.\n    * \n    * @returns {string} \n    *\n    * @memberof Autodesk.Viewing.Extensions.ExplodeExtension\n    * @alias Autodesk.Viewing.Extensions.ExplodeExtension#getStrategy\n    */\nproto.getStrategy = function () {\n  return this.viewer.prefs.get(avp.Prefs3D.EXPLODE_STRATEGY);\n};\n\n/**\n    * @private\n    */\nproto._onExplode = function (event) {\n  this._slider.value = event.scale;\n};\n\n/**\n    * Enable / Disable the explode button & slider.\n    * Doesn't affect the state of the explode scale itself.\n    *\n    * @param {boolean} enable - enable / disable the UI.\n    * \n    * @memberof Autodesk.Viewing.Extensions.ExplodeExtension\n    * @alias Autodesk.Viewing.Extensions.ExplodeExtension#setUIEnabled\n    */\nproto.setUIEnabled = function (enable) {\n  if (this._explodeButton) {\n    if (enable) {\n      // Re-enable button\n      this._explodeButton.setState(Autodesk.Viewing.UI.Button.State.INACTIVE);\n\n      if (this._wasActive) {\n        this.activate();\n      }\n    } else {\n      this._wasActive = this.isActive();\n\n      // We don't just use deactivate() because you want to keep the explode scale.\n      _hideSlider(this);\n\n      // Disable button\n      this._explodeButton.setState(Autodesk.Viewing.UI.Button.State.DISABLED);\n    }\n  }\n};\n\n/**\n    * Create toolbar button, explode slider and all other UI.\n    *\n    * @private\n    */\nfunction _createUI(ext, toolbar) {\n\n  var avu = Autodesk.Viewing.UI;\n  var viewer = ext.viewer;\n\n  var explodeButton = new Button('toolbar-explodeTool');\n  explodeButton.setIcon(\"adsk-icon-explode\");\n  explodeButton.setToolTip(\"Explode model\");\n  viewer.modelTools.addControl(explodeButton);\n\n  var htmlString = '<div class=\"docking-panel docking-panel-container-solid-color-b explode-submenu\" style=\"display:none\"><input class=\"explode-slider\" type=\"range\" min=\"0\" max=\"1\" step=\"0.01\" value=\"0\"/></div>';\n  var explodeSubmenu = stringToDOM(htmlString);\n\n  var parentDom;\n  var _document = ext.getDocument();\n  if (isIOSDevice()) {\n    // hack fix for iOS bug\n    // range input not draggable when nested under button\n    parentDom = _document.querySelector(\"#toolbar-explodeTool\").parentNode;\n    explodeSubmenu.classList.add(\"ios\");\n  } else\n  if (isAndroidDevice()) {\n    // hack fix for Android bug\n    // range input not draggable when nested under button\n    parentDom = _document.querySelector(\"#toolbar-explodeTool\").parentNode;\n    explodeSubmenu.classList.add(\"android\");\n  } else\n  {\n    parentDom = explodeButton.container;\n  }\n  parentDom.appendChild(explodeSubmenu);\n\n  var slider = explodeSubmenu.querySelector(\".explode-slider\");\n  slider.addEventListener(isIE11 ? \"change\" : \"input\", function (event) {\n    ext.setScale(slider.value);\n  });\n\n  if (isIE11) {\n    // In IE11, the input type=range has a weird default layout...\n    slider.style['padding-top'] = '0';\n    slider.style['padding-bottom'] = '0';\n    slider.style['margin-top'] = '10px';\n  }\n\n  explodeSubmenu.onclick = function (event) {\n    event.stopPropagation();\n  };\n\n  // hack to disable tooltip\n  var tooltip = explodeButton.container.querySelector(\".adsk-control-tooltip\");\n\n  explodeButton.onClick = function (event) {\n\n    if (ext.isActive()) {\n      ext.deactivate();\n    } else {\n      ext.activate();\n\n      // Track tool change only when interacted by the end user.\n      logger.track({ category: 'tool_changed', name: 'explode' });\n    }\n  };\n\n  // Keep references\n  ext._slider = slider;\n  ext._explodeButton = explodeButton;\n  ext._explodeSubmenu = explodeSubmenu;\n  ext._tooltip = tooltip;\n\n  // backwards compatibility references\n  viewer.explodeSlider = slider;\n  viewer.explodeSubmenu = explodeSubmenu;\n}\n\n/**\n   * @param {Object} ext - The extension\n   * @private\n   */\nfunction _destroyUI(ext) {\n\n  var viewer = ext.viewer;\n\n  // early bail out if the UI hasn't actually been initialized.\n  if (!ext._slider) {\n    return;\n  }\n\n  if (ext._explodeButton) {\n    ext._explodeButton.removeFromParent();\n  }\n\n  // Reset references\n  ext._slider = null;\n  ext._explodeButton = null;\n  ext._explodeSubmenu = null;\n  ext._tooltip = null;\n\n  // Reset backwards compatibility references\n  viewer.explodeSlider = null;\n  viewer.explodeSubmenu = null;\n}\n\n/**\n   * @param {Object} ext - The extension\n   * @private\n   */\nfunction _hideSlider(ext) {\n  ext._slider.parentNode.style.display = \"none\";\n  ext._tooltip.style.display = \"\";\n}","var av = Autodesk.Viewing;\nvar GlobalManagerMixin = av.GlobalManagerMixin;\n\nexport function ExplodeTool(viewer) {\n  av.ToolInterface.call(this);\n\n  this.names = ['explode'];\n  this.viewer = viewer;\n  this.setGlobalManager(this.viewer.globalManager);\n  this.active = false;\n\n  this.activate = function (name, viewer) {\n    this.active = true;\n  };\n\n  this.deactivate = function () {\n    this.setScale(0);\n    this.active = false;\n  };\n\n  this.setScale = function (value) {\n    return this.viewer.explode(value);\n  };\n\n  this.isActive = function () {\n    return this.active;\n  };\n}\n\nGlobalManagerMixin.call(ExplodeTool.prototype);","\nimport { Extension } from \"../../src/application/Extension\";\n\n\n/**\n                                                              * Use its `activate()` method to enter fullscreen mode.\n                                                              * It performs the same action as the toolbar's fullscreen button.\n                                                              * \n                                                              * The extension id is: `Autodesk.FullScreen`\n                                                              * \n                                                              * @example\n                                                              *   viewer.loadExtension('Autodesk.FullScreen')\n                                                              * \n                                                              * @memberof Autodesk.Viewing.Extensions\n                                                              * @alias Autodesk.Viewing.Extensions.FullScreenExtension\n                                                              * @see {@link Autodesk.Viewing.Extension} for common inherited methods.\n                                                              * @constructor\n                                                              */\nexport function FullScreenExtension(viewer, options) {\n  Extension.call(this, viewer, options);\n  this.viewer = viewer;\n  this.options = options;\n  this.name = \"fullscreen\";\n}\nFullScreenExtension.prototype = Object.create(Extension.prototype);\nFullScreenExtension.prototype.constructor = FullScreenExtension;\n\nvar proto = FullScreenExtension.prototype;\n\n/**\n                                            * Enters fullscreen mode.\n                                            * \n                                            * @memberof Autodesk.Viewing.Extensions.FullScreenExtension\n                                            * @alias Autodesk.Viewing.Extensions.FullScreenExtension#activate\n                                            */\nproto.activate = function () {\n  if (!this.activeStatus) {\n    this.viewer.nextScreenMode();\n    this.activeStatus = true;\n  }\n  return true;\n};\n\n/**\n    * Exits fullscreen mode.\n    * \n    * @memberof Autodesk.Viewing.Extensions.FullScreenExtension\n    * @alias Autodesk.Viewing.Extensions.FullScreenExtension#deactivate\n    */\nproto.deactivate = function () {\n  if (this.activeStatus) {\n    this.viewer.escapeScreenMode();\n    this.activeStatus = false;\n  }\n  return true;\n};","// extracted by mini-css-extract-plugin","\nimport { Extension } from \"../../src/application/Extension\";\nimport { TOOLBAR } from \"../../src/gui/GuiViewerToolbarConst\";\nimport { Button } from \"../../src/gui/controls/Button\";\nimport { FusionOrbitTool } from \"./FusionOrbitTool\";\n\nimport \"./FusionOrbit.css\"; // IMPORTANT!!\n\n/**\n * Provides a customization to the orbit tool. \n * \n * The extension id is: `Autodesk.Viewing.FusionOrbit`\n * \n * @example\n *   viewer.loadExtension('Autodesk.Viewing.FusionOrbit')\n * \n * @memberof Autodesk.Viewing.Extensions\n * @alias Autodesk.Viewing.Extensions.FusionOrbitExtension\n * @see {@link Autodesk.Viewing.Extension} for common inherited methods.\n * @constructor\n */\nexport function FusionOrbitExtension(viewer, options) {\n  Extension.call(this, viewer, options);\n  this.name = 'fusionorbit';\n  this.modes = ['fusionorbit', 'fusionfreeorbit'];\n}\n\nFusionOrbitExtension.prototype = Object.create(Extension.prototype);\nFusionOrbitExtension.prototype.constructor = FusionOrbitExtension;\n\nvar proto = FusionOrbitExtension.prototype;\n\nproto.load = function () {\n  var self = this;\n  var viewer = this.viewer;\n\n  this.tool = new FusionOrbitTool();\n  this.tool.setViewer(viewer);\n  viewer.toolController.registerTool(this.tool);\n\n  return true;\n};\n\nproto.onToolbarCreated = function (toolbar)\n{\n  var self = this;\n  var viewer = this.viewer;\n  var navTools = toolbar.getControl(TOOLBAR.NAVTOOLSID);\n\n  if (!navTools || !navTools.orbitbutton) {\n    return;\n  }\n\n  // save button behaviors, before modifying them\n  this.classicBehavior = {};\n  this.classicBehavior.orbitOnClick = navTools.orbitbutton.onClick;\n  this.classicBehavior.freeorbitOnClick = navTools.freeorbitbutton.onClick;\n  this.classicBehavior.returnToDefault = navTools.returnToDefault;\n\n  navTools.freeorbitbutton.onClick = function (e) {\n    var state = navTools.freeorbitbutton.getState();\n    if (state === Button.State.INACTIVE) {\n      self.activate('fusionfreeorbit');\n      navTools.freeorbitbutton.setState(Button.State.ACTIVE);\n    } else if (state === Button.State.ACTIVE) {\n      self.deactivate();\n      navTools.freeorbitbutton.setState(Button.State.INACTIVE);\n    }\n  };\n\n  navTools.orbitbutton.onClick = function (e) {\n    var state = navTools.orbitbutton.getState();\n    if (state === Button.State.INACTIVE) {\n      self.activate('fusionorbit');\n      navTools.orbitbutton.setState(Button.State.ACTIVE);\n    } else if (state === Button.State.ACTIVE) {\n      self.deactivate();\n    }\n  };\n\n  navTools.returnToDefault = function () {\n    if (navTools.orbittoolsbutton) {// can be null when switching sheets\n      // clear active button\n      navTools.orbittoolsbutton.setState(Button.State.ACTIVE);\n    }\n  };\n\n  // set combo button\n  navTools.orbittoolsbutton.setState(Button.State.INACTIVE);\n  if (viewer.prefs.fusionOrbitConstrained) {\n    navTools.orbittoolsbutton.onClick = navTools.orbitbutton.onClick;\n    navTools.orbittoolsbutton.setIcon(navTools.orbitbutton.iconClass);\n    viewer.setDefaultNavigationTool(\"orbit\");\n  } else {\n    navTools.orbittoolsbutton.onClick = navTools.freeorbitbutton.onClick;\n    navTools.orbittoolsbutton.setIcon(navTools.freeorbitbutton.iconClass);\n    viewer.setDefaultNavigationTool(\"freeorbit\");\n  }\n\n  // reset\n  viewer.setActiveNavigationTool();\n  navTools.returnToDefault && navTools.returnToDefault();\n};\n\nproto.unload = function () {\n\n  var viewer = this.viewer;\n\n  // restore LMV Classic button behaviors\n  if (this.classicBehavior) {\n    var toolbar = viewer.getToolbar();\n    var navTools = toolbar.getControl(TOOLBAR.NAVTOOLSID);\n\n    if (navTools) {\n      if (navTools.orbitbutton)\n      navTools.orbitbutton.onClick = this.classicBehavior.orbitOnClick;\n\n      if (navTools.freeorbitbutton)\n      navTools.freeorbitbutton.onClick = this.classicBehavior.freeorbitOnClick;\n\n      navTools.returnToDefault = this.classicBehavior.returnToDefault;\n\n      if (navTools.orbittoolsbutton) {// can be null when switching sheets\n        if (navTools.orbitbutton)\n        navTools.orbittoolsbutton.onClick = navTools.orbitbutton.onClick;else\n\n        navTools.orbittoolsbutton.onClick = null;\n        navTools.orbittoolsbutton.setIcon(\"adsk-icon-orbit-constrained\");\n        navTools.orbittoolsbutton.setState(Button.State.ACTIVE);\n      }\n    }\n    this.classicBehavior = null;\n  }\n\n  viewer.setActiveNavigationTool(\"orbit\");\n  viewer.setDefaultNavigationTool(\"orbit\");\n\n  // Deregister tool\n  viewer.toolController.deregisterTool(this.tool);\n  this.tool.setViewer(null);\n  this.tool = null;\n\n  return true;\n};\n\n/**\n    * Activates the extension's tool.\n    * \n    * @param {string} [mode] - Either 'fusionorbit' (default) or 'fusionfreeorbit'. \n    * \n    * @memberof Autodesk.Viewing.Extensions.FusionOrbitExtension\n    * @alias Autodesk.Viewing.Extensions.FusionOrbitExtension#activate\n    */\nproto.activate = function (mode) {\n  if (this.activeStatus && this.mode === mode) {\n    return;\n  }\n  switch (mode) {\n    default:\n    case 'fusionorbit':\n      this.viewer.setActiveNavigationTool(\"fusion orbit constrained\");\n      this.mode = 'fusionorbit';\n      break;\n    case 'fusionfreeorbit':\n      this.viewer.setActiveNavigationTool(\"fusion orbit\");\n      this.mode = 'fusionfreeorbit';\n      break;}\n\n  this.activeStatus = true;\n  return true;\n};\n\n/**\n    * Deactivates the extension's tool.\n    * \n    * @memberof Autodesk.Viewing.Extensions.FusionOrbitExtension\n    * @alias Autodesk.Viewing.Extensions.FusionOrbitExtension#deactivate\n    */\nproto.deactivate = function () {\n  if (this.activeStatus) {\n    this.viewer.setActiveNavigationTool();\n    this.activeStatus = false;\n  }\n  return true;\n};","\nimport { stringToDOM } from \"../../src/globals\";\nimport { isTouchDevice } from \"../../src/compat\";\nimport { Navigation } from \"../../src/tools/Navigation\";\n\nvar av = Autodesk.Viewing;\n\nvar html = [\n'<div class=\"orbit-gizmo noselect\">',\n'<div class=\"outside\"></div>',\n'<div class=\"ring\"></div>',\n'<div class=\"layout-hor\">',\n'<div class=\"edgemark-area\"><div class=\"edgemark\"></div></div>',\n'</div>',\n'<div class=\"layout-mid\">',\n'<div class=\"layout-ver\">',\n'<div class=\"edgemark-area\"><div class=\"edgemark\"></div></div>',\n'</div>',\n'<div class=\"circle\">',\n'<div class=\"crosshair-area\">',\n'<div class=\"crosshair-v\"></div>',\n'<div class=\"crosshair-h\"></div>',\n'</div>',\n'</div>',\n'<div class=\"layout-ver\">',\n'<div class=\"edgemark-area\"><div class=\"edgemark\"></div></div>',\n'</div>',\n'</div>',\n'<div class=\"layout-hor\">',\n'<div class=\"edgemark-area\"><div class=\"edgemark\"></div></div>',\n'</div>',\n'</div>'].\njoin(\"\\n\");\n\nexport function FusionOrbitTool() {\n\n  var _names = [\"fusion orbit\", \"fusion orbit constrained\"];\n\n  var _PERCENT_SIZE = 0.8;\n  var _EXIT_PERCENT_SIZE = 1.2;\n  var _CIRCLE_CURSOR_STYLE = \"url(data:image/png;base64,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), auto\";\n\n  var _orbitModes = {\n    HORIZONTAL: 0,\n    VERTICAL: 1,\n    ROLL: 2 };\n\n\n  var _orbitSpeeds = {\n    HORIZONTAL: 0.005,\n    VERTICAL: 0.005,\n    ROLL: 1.0 };\n\n\n  var _gizmoElem,_gizmoRect = {},_ringElem,_outsideElem;\n  var _isConstrained;\n  var _camera;\n  var _isTouch = isTouchDevice();\n  var _isClickToExit = false;\n\n  var _mouse = {\n    buttons: [],\n    src: undefined,\n    x: 0,\n    y: 0,\n    dx: 0,\n    dy: 0,\n    firstMove: true, // for dx/dy calc\n    mode: undefined };\n\n\n  var _this = this;\n\n  this.setViewer = function (viewer) {\n    this.viewer = viewer;\n    this.navapi = viewer ? viewer.navigation : null;\n    viewer && this.setGlobalManager(viewer.globalManager);\n  };\n\n  // PRIVATE FUNCTIONS\n\n  var _onMouseDown = function _onMouseDown(e) {\n    _mouse.buttons[e.touches ? 0 : e.button] = true;\n    _mouse.src = e.target.className;\n    _mouse.x = 0;\n    _mouse.y = 0;\n    _mouse.dx = 0;\n    _mouse.dy = 0;\n    _mouse.firstMove = true;\n    _mouse.mode = undefined;\n\n    if (_mouse.src === \"ring\") {\n      _mouse.mode = _orbitModes.ROLL;\n    } else\n    if (_mouse.src === \"edgemark-area\") {\n      if (e.target.parentNode.className === \"layout-ver\")\n      _mouse.mode = _orbitModes.HORIZONTAL;else\n      if (e.target.parentNode.className === \"layout-hor\")\n      _mouse.mode = _orbitModes.VERTICAL;\n    }\n\n    _centerPivot();\n\n    e.stopPropagation();\n  };\n\n  var _onMouseUp = function _onMouseUp(e) {\n    _mouse.buttons[e.touches ? 0 : e.button] = false;\n    _mouse.src = undefined;\n  };\n\n  var _onMouseMove = function _onMouseMove(e) {\n    if (!_mouse.buttons[0]) return;\n\n    _updateMousePos(e);\n    _updateCamera();\n\n    _mouse.firstMove = false;\n  };\n\n  var _updateMousePos = function _updateMousePos(e) {\n    var pageX = e.touches ? e.touches[0].pageX : e.pageX;\n    var pageY = e.touches ? e.touches[0].pageY : e.pageY;\n\n    if (!_mouse.firstMove) {\n      _mouse.dx = pageX - _mouse.x;\n      _mouse.dy = pageY - _mouse.y;\n    }\n    _mouse.x = pageX;\n    _mouse.y = pageY;\n  };\n\n  var _updateCamera = function _updateCamera() {\n\n    // if (_mouse.dx === 0 && _mouse.dy === 0) return;\n    switch (_mouse.mode) {\n      case _orbitModes.ROLL:\n        if (!_this.navapi.isActionEnabled('roll')) {\n          return;\n        }\n        break;\n      case _orbitModes.HORIZONTAL:\n      case _orbitModes.VERTICAL:\n        if (!_this.navapi.isActionEnabled('orbit')) {\n          return;\n        }\n        break;}\n\n\n    var eyeVec = _camera.target.clone().sub(_camera.position).normalize();\n    var rightVec = eyeVec.clone().cross(_camera.up).normalize();\n    var upVec = rightVec.clone().cross(eyeVec).normalize();\n    _camera.up.copy(upVec); // update camera.up\n\n    if (_mouse.mode === _orbitModes.ROLL) {\n      var start = new THREE.Vector3(_mouse.x - _gizmoRect.center.x, _mouse.y - _gizmoRect.center.y, 0);\n      var end = new THREE.Vector3(_mouse.dx, _mouse.dy, 0).add(start);\n      start.normalize();\n      end.normalize();\n      var cross = start.clone().cross(end);\n      var angle = Math.asin(cross.z);\n      _camera.up.applyAxisAngle(eyeVec, -angle * _orbitSpeeds.ROLL);\n    } else\n    {\n      var rotAxis, rotAmount;\n\n      if (_mouse.mode === _orbitModes.HORIZONTAL) {\n        rotAmount = -_mouse.dx * _orbitSpeeds.HORIZONTAL;\n        if (_isConstrained)\n        _camera.up = Navigation.snapToAxis(_camera.up.clone()); // snap up vec\n        rotAxis = _camera.up;\n      } else\n      if (_mouse.mode === _orbitModes.VERTICAL) {\n        rotAmount = -_mouse.dy * _orbitSpeeds.VERTICAL;\n        if (_isConstrained) {\n          if (_mouse.firstMove) // first time move, snap\n            _camera.up = Navigation.snapToAxis(_camera.up.clone());\n          rotAxis = eyeVec.clone().cross(_camera.up).normalize(); // new right vec\n        } else\n        {\n          rotAxis = rightVec;\n        }\n        _camera.up.applyAxisAngle(rotAxis, rotAmount);\n      }\n\n      var pivot = _this.navapi.getPivotPoint();\n      var newPivotToCam = _camera.position.clone().sub(pivot);\n      newPivotToCam.applyAxisAngle(rotAxis, rotAmount);\n      _camera.position.addVectors(pivot, newPivotToCam); // orbit position\n\n      var newPivotToTarget = _camera.target.clone().sub(pivot);\n      newPivotToTarget.applyAxisAngle(rotAxis, rotAmount);\n      _camera.target.addVectors(pivot, newPivotToTarget); // orbit target\n    }\n\n    _camera.dirty = true;\n\n  };\n\n  // may return camera.target, do not modify\n  var _findTarget = function _findTarget() {\n    var eyeVec = _camera.target.clone().sub(_camera.position).normalize();\n    var hit = _this.viewer.impl.rayIntersect(new THREE.Ray(_camera.position, eyeVec));\n    return hit && hit.intersectPoint ?\n    hit.intersectPoint :\n    _camera.target;\n  };\n\n  var _getCameraPlane = function _getCameraPlane(pos, nor) {\n    var planeNor = nor || pos.clone().sub(_camera.position).normalize();\n    return new THREE.Plane(\n    planeNor, -planeNor.x * pos.x - planeNor.y * pos.y - planeNor.z * pos.z);\n\n  };\n\n  var _centerPivot = function _centerPivot() {\n    // find distance pivot to camera plane\n    // set new pivot to be that distance along eye vector\n    var eyeVec = _camera.target.clone().sub(_camera.position).normalize();\n    var plane = _getCameraPlane(_camera.position, eyeVec);\n    var dist = plane.distanceToPoint(_camera.pivot);\n    _camera.pivot.copy(eyeVec).multiplyScalar(dist).add(_camera.position);\n  };\n\n  var _onMouseDownCircle = function _onMouseDownCircle(e) {\n    if (!e.touches && e.button === 0)\n    _centerPivot(); // center pivot before passing thru to orbit tool\n  };\n\n  var _clickToExit = function _clickToExit(e) {\n    if (_isClickToExit)\n    _this.viewer.setActiveNavigationTool();\n  };\n\n  var _clickToFocus = function _clickToFocus(x, y) {\n    var hit = _this.viewer.impl.hitTest(x, y);\n    var newTarget;\n\n    if (hit && hit.intersectPoint) {\n      newTarget = hit.intersectPoint;\n    } else\n    {\n      // intersect camera plane\n      var ray = _this.viewer.impl.viewportToRay(_this.viewer.impl.clientToViewport(x, y));\n      newTarget = ray.intersectPlane(_getCameraPlane(_camera.target));\n    }\n\n    var newCamPos = _camera.position.clone().sub(_findTarget()).add(newTarget);\n    _this.navapi.setRequestTransition(true, newCamPos, newTarget, _camera.fov);\n  };\n\n\n  // TOOL INTERFACE\n\n  this.register = function () {\n    _gizmoElem = stringToDOM(html);\n    _gizmoElem.style.display = \"none\";\n    this.viewer.canvasWrap.insertBefore(_gizmoElem, this.viewer.canvasWrap.firstChild);\n\n    _ringElem = _gizmoElem.querySelector(\".ring\");\n    _ringElem.addEventListener(\"mousedown\", _onMouseDown);\n\n    Array.prototype.forEach.call(_gizmoElem.querySelectorAll(\".edgemark-area\"), function (elem, i) {\n      elem.addEventListener(\"mousedown\", _onMouseDown);\n      if (_isTouch) elem.addEventListener(\"touchstart\", _onMouseDown);\n    });\n\n    this.addWindowEventListener(\"mouseup\", _onMouseUp);\n    this.addWindowEventListener(\"mousemove\", _onMouseMove);\n\n    // click to exit\n    _outsideElem = _gizmoElem.querySelector(\".outside\");\n    _outsideElem.addEventListener(\"mousedown\", _clickToExit);\n\n    // before passing thru to orbit (default) tool\n    var circleElem = _gizmoElem.querySelector(\".circle\");\n    circleElem.addEventListener(\"mousedown\", _onMouseDownCircle);\n\n    if (_isTouch) {\n      _ringElem.addEventListener(\"touchstart\", _onMouseDown);\n      this.addWindowEventListener(\"touchend\", _onMouseUp);\n      this.addWindowEventListener(\"touchmove\", _onMouseMove);\n      _outsideElem.addEventListener(\"touchstart\", _clickToExit);\n      circleElem.addEventListener(\"touchstart\", _onMouseDownCircle);\n    }\n\n    _camera = this.viewer.impl.camera;\n  };\n\n  this.deregister = function () {\n    this.removeWindowEventListener(\"mouseup\", _onMouseUp);\n    this.removeWindowEventListener(\"mousemove\", _onMouseMove);\n    _outsideElem.removeEventListener(\"mousedown\", _clickToExit);\n\n    if (_isTouch) {\n      this.removeWindowEventListener(\"touchend\", _onMouseUp);\n      this.removeWindowEventListener(\"touchmove\", _onMouseMove);\n      _outsideElem.removeEventListener(\"touchstart\", _clickToExit);\n    }\n\n    this.viewer.canvasWrap.removeChild(_gizmoElem);\n\n    _gizmoElem = undefined;\n    _ringElem = undefined;\n    _outsideElem = undefined;\n  };\n\n  this.activate = function (name) {\n    _gizmoElem.style.display = \"\";\n\n    this.handleResize();\n\n    _isConstrained = name === \"fusion orbit constrained\";\n\n    var hyperlink = this.viewer.toolController.isToolActivated(\"hyperlink\");\n\n    // Need to make Hyperlink sit on top of default navigation tool\n    if (hyperlink)\n    this.viewer.toolController.deactivateTool(\"hyperlink\");\n\n    if (_isConstrained) {\n      this.viewer.setDefaultNavigationTool(\"orbit\");\n      this.viewer.prefs.set(\"fusionOrbitConstrained\", true);\n    } else\n    {\n      this.viewer.setDefaultNavigationTool(\"freeorbit\");\n      this.viewer.prefs.set(\"fusionOrbitConstrained\", false);\n    }\n\n    if (hyperlink)\n    this.viewer.toolController.activateTool(\"hyperlink\");\n\n    this.viewer.navigation.setZoomTowardsPivot(true);\n  };\n\n  this.deactivate = function (name) {\n    _gizmoElem.style.display = \"none\";\n    this.viewer.navigation.setZoomTowardsPivot(this.viewer.prefs.zoomTowardsPivot);\n  };\n\n  this.getNames = function () {\n    return _names;\n  };\n\n  this.getName = function () {\n    return _names[0];\n  };\n\n  this.update = function () {\n    return false;\n  };\n\n  this.handleSingleClick = function (event, button) {\n    _clickToFocus(event.canvasX, event.canvasY);\n    return true;\n  };\n\n  this.handleDoubleClick = function (event, button) {\n    return true; // disabled, does not play nice with SingleClick\n  };\n\n  this.handleSingleTap = function (event) {\n    _clickToFocus(event.canvasX, event.canvasY);\n    return true;\n  };\n\n  this.handleDoubleTap = function (event) {\n    return false; // enabled, DoubleTap doesn't register the first SingleTap\n  };\n\n  this.handleKeyDown = function (event, keyCode) {\n    return false;\n  };\n\n  this.handleKeyUp = function (event, keyCode) {\n    return false;\n  };\n\n  this.handleWheelInput = function (delta) {\n    return false;\n  };\n\n  this.handleButtonDown = function (event, button) {\n    return false;\n  };\n\n  this.handleButtonUp = function (event, button) {\n    return false;\n  };\n\n  this.handleMouseMove = function (event) {\n    var rect = this.viewer.impl.getCanvasBoundingClientRect();\n    var vp;\n    if (rect.width > rect.height) {\n      vp = new THREE.Vector2(\n      ((event.canvasX + 0.5) / rect.width * 2 - 1) * rect.width / rect.height,\n      -((event.canvasY + 0.5) / rect.height) * 2 + 1);\n\n    } else {\n      vp = new THREE.Vector2(\n      (event.canvasX + 0.5) / rect.width * 2 - 1,\n      (-((event.canvasY + 0.5) / rect.height) * 2 + 1) * rect.height / rect.width);\n\n    }\n\n    var radius = vp.length();\n\n    var isOutside = radius > _EXIT_PERCENT_SIZE;\n    if (_isClickToExit !== isOutside) {\n      if (isOutside)\n      _outsideElem.style.cursor = \"\";else\n\n      _outsideElem.style.cursor = _CIRCLE_CURSOR_STYLE;\n      _isClickToExit = isOutside;\n      // console.log(\"click exit: \" + _isClickToExit);\n    }\n\n    return false;\n  };\n\n  this.handleGesture = function (event) {\n    _centerPivot();\n    return false;\n  };\n\n  this.handleBlur = function (event) {\n    return false;\n  };\n\n  this.handleResize = function () {\n    // for mouse roll\n    var rect = _gizmoElem.getBoundingClientRect();\n    var _window = this.getWindow();\n    _gizmoRect.left = rect.left + _window.pageXOffset;\n    _gizmoRect.top = rect.top + _window.pageYOffset;\n    _gizmoRect.width = rect.width;\n    _gizmoRect.height = rect.height;\n    _gizmoRect.center = {};\n    _gizmoRect.center.x = _gizmoRect.left + _gizmoRect.width / 2;\n    _gizmoRect.center.y = _gizmoRect.top + _gizmoRect.height / 2;\n\n    // resize gizmo\n    var dim = (_window.innerWidth > _window.innerHeight ? _window.innerHeight : _window.innerWidth) * _PERCENT_SIZE;\n    _gizmoElem.style.width = _gizmoElem.style.height = \"\" + dim + \"px\";\n    _gizmoElem.style.top = _gizmoElem.style.left = \"calc(50% - \" + dim / 2 + \"px)\";\n    _ringElem.style.borderWidth = \"\" + dim * 0.1 + \"px\";\n  };\n}\n\nav.GlobalManagerMixin.call(FusionOrbitTool.prototype);","\nimport { Extension } from \"../../src/application/Extension\";\n\n\n/**\n                                                              * Use its `activate()` method to animate the camera back to its\n                                                              * default, home view. The extension doesn't provide any UI.\n                                                              * \n                                                              * The extension id is: `Autodesk.GoHome`\n                                                              * \n                                                              * @example\n                                                              *   viewer.loadExtension('Autodesk.GoHome')\n                                                              * \n                                                              * @memberof Autodesk.Viewing.Extensions\n                                                              * @alias Autodesk.Viewing.Extensions.GoHomeExtension\n                                                              * @see {@link Autodesk.Viewing.Extension} for common inherited methods.\n                                                              * @constructor\n                                                              */\nexport function GoHomeExtension(viewer, options) {\n  Extension.call(this, viewer, options);\n  this.viewer = viewer;\n  this.options = options;\n  this.name = \"gohome\";\n}\nGoHomeExtension.prototype = Object.create(Extension.prototype);\nGoHomeExtension.prototype.constructor = GoHomeExtension;\n\nvar proto = GoHomeExtension.prototype;\n\n/**\n                                        * Animates the camera back to its home location.\n                                        * \n                                        * @memberof Autodesk.Viewing.Extensions.GoHomeExtension\n                                        * @alias Autodesk.Viewing.Extensions.GoHomeExtension#activate\n                                        */\nproto.activate = function () {\n  this.viewer.navigation.setRequestHomeView(true);\n  return true;\n};\n\n/**\n   * It doesn't do anything.\n   * \n   * @memberof Autodesk.Viewing.Extensions.GoHomeExtension\n   * @alias Autodesk.Viewing.Extensions.GoHomeExtension#activate\n   */\nproto.deactivate = function () {\n  return false;\n};","\nimport { Extension } from \"../../src/application/Extension\";\nimport { ViewerModelStructurePanel } from \"../../src/gui/ViewerModelStructurePanel\";\nimport { isMobileDevice } from \"../../src/compat\";\nimport { Button } from \"../../src/gui/controls/Button\";\nimport * as et from \"../../src/application/EventTypes\";\n\nvar avp = Autodesk.Viewing.Private;\n\n\n/**\n                                     * Adds a toolbar button for accessing the Model Browser panel.\n                                     *\n                                     * Use its `activate()` method to open the Model Browser panel.\n                                     * The Model Browser is only available to 3D models.\n                                     * \n                                     * The extension id is: `Autodesk.ModelStructure`\n                                     *\n                                     *  {@link Autodesk.Viewing.GuiViewer3D} loads this extension by default.\n                                     * \n                                     * @example\n                                     *   viewer.loadExtension('Autodesk.ModelStructure')\n                                     * \n                                     * @memberof Autodesk.Viewing.Extensions\n                                     * @alias Autodesk.Viewing.Extensions.ModelStructureExtension\n                                     * @see {@link Autodesk.Viewing.Extension} for common inherited methods.\n                                     * @constructor\n                                     */\nexport function ModelStructureExtension(viewer, options) {\n  Extension.call(this, viewer, options);\n  this.viewer = viewer;\n  this.options = options;\n  this.name = \"modelstructure\";\n  this._modelstructure = null;\n\n  this._onLoadModel = this._onLoadModel.bind(this);\n  this._onUnloadModel = this._onUnloadModel.bind(this);\n}\nModelStructureExtension.prototype = Object.create(Extension.prototype);\nModelStructureExtension.prototype.constructor = ModelStructureExtension;\n\nvar proto = ModelStructureExtension.prototype;\n\n/**\n                                                * Invoked automatically when the extension is loaded.\n                                                * \n                                                * @memberof Autodesk.Viewing.Extensions.ModelStructureExtension\n                                                * @alias Autodesk.Viewing.Extensions.ModelStructureExtension#load\n                                                */\nproto.load = function () {\n  this.viewer.addEventListener(et.MODEL_ADDED_EVENT, this._onLoadModel);\n  this.viewer.addEventListener(et.MODEL_ROOT_LOADED_EVENT, this._onLoadModel);\n  this.viewer.addEventListener(et.MODEL_UNLOADED_EVENT, this._onUnloadModel);\n  this.viewer.addEventListener(et.MODEL_REMOVED_EVENT, this._onUnloadModel);\n  return true;\n};\n\n/**\n    * Invoked automatically when the extension is unloaded.\n    * \n    * @memberof Autodesk.Viewing.Extensions.ModelStructureExtension\n    * @alias Autodesk.Viewing.Extensions.ModelStructureExtension#unload\n    */\nproto.unload = function () {\n  this.deactivate();\n  this.setModelStructurePanel(null);\n  if (this._structureButton) {\n    this.viewer.settingsTools.removeControl(this._structureButton);\n    this.viewer.settingsTools.structurebutton = null;\n    this._structureButton = null;\n  }\n  this.viewer.removeEventListener(et.MODEL_ADDED_EVENT, this._onLoadModel);\n  this.viewer.removeEventListener(et.MODEL_ROOT_LOADED_EVENT, this._onLoadModel);\n  this.viewer.removeEventListener(et.MODEL_UNLOADED_EVENT, this._onUnloadModel);\n  this.viewer.removeEventListener(et.MODEL_REMOVED_EVENT, this._onUnloadModel);\n  return true;\n};\n\n\n/**\n    * Invoked after the Toolbar UI gets created. Adds toolbar button.\n    *\n    * @param {Autodesk.Viewing.UI.ToolBar} toolbar - toolbar instance.\n    *\n    * @alias Autodesk.Viewing.Extensions.ModelStructureExtension#onToolbarCreated\n    */\nproto.onToolbarCreated = function (toolbar) {var _this = this;\n\n  // Toolbar button\n  var structureButton = new Button('toolbar-modelStructureTool');\n  structureButton.setToolTip('Model browser');\n  structureButton.setIcon(\"adsk-icon-structure\");\n  structureButton.onClick = function (e) {\n    var newVisible = !_this._modelstructure.isVisible();\n    if (newVisible) {\n      _this.activate();\n    } else {\n      _this.deactivate();\n    }\n  };\n\n  var settingTools = this.viewer.settingsTools;\n  settingTools.addControl(structureButton, { index: 0 });\n  settingTools.structurebutton = structureButton; // legacy... remove in v8.0\n  this._structureButton = structureButton;\n\n  // Panel instance \n  this.restoreDefaultPanel();\n};\n\n\n/**\n    * Opens the Model Browser UI.\n    * \n    * @memberof Autodesk.Viewing.Extensions.ModelStructureExtension\n    * @alias Autodesk.Viewing.Extensions.ModelStructureExtension#activate\n    */\nproto.activate = function () {\n  if (this._modelstructure) {\n    this._modelstructure.setVisible(true);\n    avp.analytics.track('viewer.model_browser', {\n      action: 'View List' });\n\n    return true;\n  }\n  return false;\n};\n\n/**\n    * Closes the Model Browser UI.\n    * \n    * @memberof Autodesk.Viewing.Extensions.ModelStructureExtension\n    * @alias Autodesk.Viewing.Extensions.ModelStructureExtension#deactivate\n    */\nproto.deactivate = function () {\n  if (this._modelstructure) {\n    this._modelstructure.setVisible(false);\n  }\n  return true; // always\n};\n\n/**\n    * @returns {boolean} true when the panel is visible.\n    *\n    * @alias Autodesk.Viewing.Extensions.ModelStructureExtension#isActive\n    */\nproto.isActive = function () {\n  if (this._modelstructure) {\n    return this._modelstructure.isVisible();\n  }\n  return false;\n};\n\n/**\n    * Sets the panel instance to open when clicking the toolbar button.\n    * Use the API to override the default panel with a custom one.\n    *\n    * @param {Autodesk.Viewing.UI.ModelStructurePanel} modelStructurePanel - The model structure panel to use, or null.\n    * @returns {boolean} True if the panel, or null, was set successfully; false otherwise.\n    *\n    * @alias Autodesk.Viewing.Extensions.ModelStructureExtension#setModelStructurePanel\n    */\nproto.setModelStructurePanel = function (modelStructurePanel) {var _this2 = this;\n\n  if (modelStructurePanel === this._modelstructure)\n  return false;\n\n  if (this._modelstructure) {\n    this._modelstructure.setVisible(false); // This ensures the button is in the correct state.\n    this.viewer.removePanel(this._modelstructure);\n    this._modelstructure.uninitialize();\n  }\n\n  this._modelstructure = modelStructurePanel;\n  this.viewer.modelstructure = modelStructurePanel; // legacy compatibility; removed after v8.0.0\n  if (!modelStructurePanel) {\n    return true;\n  }\n\n  this.viewer.addPanel(this._modelstructure);\n\n  // Notify of all models already loaded\n  var models = this.viewer.impl.modelQueue().getModels();\n  for (var i = 0; i < models.length; ++i) {\n    this._modelstructure.addModel(models[i]);\n  }\n\n  this._modelstructure.addVisibilityListener(function (visible) {\n    if (visible) {\n      _this2.viewer.onPanelVisible(_this2._modelstructure);\n    }\n    _this2._structureButton.setState(visible ? Button.State.ACTIVE : Button.State.INACTIVE);\n  });\n\n  return true;\n};\n\n/**\n    * Removes custom panel and restores the default one.\n    *\n    * @alias Autodesk.Viewing.Extensions.ModelStructureExtension#restoreDefaultPanel \n    */\nproto.restoreDefaultPanel = function () {\n\n  var config = this.viewer.config;\n  var options = {\n    docStructureConfig: config.docStructureConfig,\n    hideSearch: isMobileDevice(),\n    excludeRoot: config.modelBrowserExcludeRoot,\n    startCollapsed: config.modelBrowserStartCollapsed };\n\n  var modelTitle = config.defaultModelStructureTitle || 'Browser';\n  var panelInstance = new ViewerModelStructurePanel(this.viewer, modelTitle, options);\n  this.setModelStructurePanel(panelInstance);\n};\n\n/**\n    * @private\n    */\nproto._onLoadModel = function (event) {\n  if (this._modelstructure) {\n    this._modelstructure.addModel(event.model);\n  }\n};\n\n/**\n    * @private\n    */\nproto._onUnloadModel = function (event) {\n  if (this._modelstructure) {\n    this._modelstructure.unloadModel(event.model);\n  }\n};","\nimport { Extension } from \"../../src/application/Extension\";\nimport { PropertyPanel } from \"../../src/gui/PropertyPanel\";\nimport { ViewerPropertyPanel } from \"../../src/gui/ViewerPropertyPanel\";\nimport { Button } from \"../../src/gui/controls/Button\";\nimport * as et from \"../../src/application/EventTypes\";\nimport { Prefs } from '../../src/application/PreferenceNames';\n\n/**\n                                                                * Use its `activate()` method to open the Properties UI.\n                                                                * \n                                                                * The extension id is: `Autodesk.PropertiesManager`\n                                                                * \n                                                                * @example\n                                                                *   viewer.loadExtension('Autodesk.PropertiesManager')\n                                                                * \n                                                                * @memberof Autodesk.Viewing.Extensions\n                                                                * @alias Autodesk.Viewing.Extensions.PropertiesManagerExtension\n                                                                * @see {@link Autodesk.Viewing.Extension} for common inherited methods.\n                                                                * @constructor\n                                                                */\nexport function PropertiesManagerExtension(viewer, options) {\n  Extension.call(this, viewer, options);\n  this.name = \"propertiesmanager\";\n  this._panel = null;\n  this._onIsolateEvent = this._onIsolateEvent.bind(this);\n  this._onSelectionChangeEvent = this._onSelectionChangeEvent.bind(this);\n  this._onPrefChange = this._onPrefChange.bind(this);\n}\n\nPropertiesManagerExtension.prototype = Object.create(Extension.prototype);\nPropertiesManagerExtension.prototype.constructor = PropertiesManagerExtension;\nvar proto = PropertiesManagerExtension.prototype;\n\n\n/**\n                                                   * Invoked when the extension gets loaded.\n                                                   * @returns {boolean} true when the extension loaded successfully.\n                                                   * @alias Autodesk.Viewing.Extensions.PropertiesManagerExtension#load\n                                                   */\nproto.load = function () {\n  this.viewer.addEventListener(et.ISOLATE_EVENT, this._onIsolateEvent);\n  this.viewer.addEventListener(et.AGGREGATE_SELECTION_CHANGED_EVENT, this._onSelectionChangeEvent);\n\n  this.viewer.prefs.addListeners(Prefs.OPEN_PROPERTIES_ON_SELECT, this._onPrefChange);\n\n  return true;\n};\n\n/**\n    * Invoked when the extension gets unloaded.\n    *\n    * @alias Autodesk.Viewing.Extensions.PropertiesManagerExtension#unload\n    */\nproto.unload = function () {\n  this.viewer.removeEventListener(et.ISOLATE_EVENT, this._onIsolateEvent);\n  this.viewer.removeEventListener(et.AGGREGATE_SELECTION_CHANGED_EVENT, this._onSelectionChangeEvent);\n\n  this.viewer.prefs.removeListeners(Prefs.OPEN_PROPERTIES_ON_SELECT, this._onPrefChange);\n\n  this.deactivate();\n  this.setPanel(null);\n\n  if (this._toolbarButton) {\n    this.viewer.settingsTools.removeControl(this._toolbarButton);\n    this.viewer.settingsTools.propertiesbutton = null; // for backwards compatibility, remove in v8.0.0\n    this._toolbarButton = null;\n  }\n};\n\n/**\n    * Invoked by the Viewer as soon as the toolbar is available.\n    */\nproto.onToolbarCreated = function (toolbar) {\n  this.setDefaultPanel();\n  this._addToolbarButton();\n};\n\n/**\n    * Opens the Properties UI.\n    * \n    * @alias Autodesk.Viewing.Extensions.PropertiesManagerExtension#activate\n    */\nproto.activate = function () {\n  if (this._panel) {\n    this._panel.setVisible(true);\n    return true;\n  }\n  return false;\n};\n\n/**\n    * Closes the Properties UI.\n    * \n    * @alias Autodesk.Viewing.Extensions.PropertiesManagerExtension#deactivate\n    */\nproto.deactivate = function () {\n  if (this._panel) {\n    this._panel.setVisible(false);\n  }\n  return true;\n};\n\n/**\n    * @returns {boolean} true is the properties panel is open.\n    * \n    * @alias Autodesk.Viewing.Extensions.PropertiesManagerExtension#isActive\n    */\nproto.isActive = function () {\n  if (this._panel) {\n    return this._panel.isVisible();\n  }\n  return false;\n};\n\n\n/**\n    * Overrides the property panel instance.\n    *\n    * @returns {boolean} True if the panel or null was set successfully, and false otherwise.\n    *\n    * @alias Autodesk.Viewing.Extensions.PropertiesManagerExtension#setPanel\n    */\nproto.setPanel = function (propertyPanel) {var _this = this;\n  if (propertyPanel instanceof PropertyPanel || !propertyPanel) {\n    if (this._panel) {\n      this._panel.setVisible(false);\n      this.viewer.removePanel(this._panel);\n      this._panel.uninitialize();\n    }\n\n    this._panel = propertyPanel;\n\n    if (propertyPanel) {\n      this.viewer.addPanel(propertyPanel);\n      propertyPanel.addVisibilityListener(function (visible) {\n        if (visible) {\n          _this.viewer.onPanelVisible(_this._panel);\n        }\n        _this._toolbarButton.setState(visible ? Button.State.ACTIVE : Button.State.INACTIVE);\n      });\n\n    }\n    return true;\n  }\n  return false;\n};\n\n/**\n    * Resets the panel to its default instance.\n    *\n    * @alias Autodesk.Viewing.Extensions.PropertiesManagerExtension#setDefaultPanel\n    */\nproto.setDefaultPanel = function () {\n  this.setPanel(new ViewerPropertyPanel(this.viewer));\n};\n\n/**\n    * Sets the property panel instance.\n    *\n    * @returns {Object} The panel instance.\n    *\n    * @alias Autodesk.Viewing.Extensions.PropertiesManagerExtension#getPanel\n    */\nproto.getPanel = function () {\n  return this._panel;\n};\n\n/**\n    * @returns {Autodesk.Viewing.UI.Button|null} the instance of the button.\n    */\nproto.getToolbarButton = function () {\n  return this._toolbarButton;\n};\n\n\n\n/**\n    * Adds a button to the toolbar.\n    * Invoked automatically as soon as the toolbar is available.\n    *\n    * @private\n    */\nproto._addToolbarButton = function () {var _this2 = this;\n\n  if (this._toolbarButton)\n  return;\n\n  var propertiesButton = this._toolbarButton = new Button('toolbar-propertiesTool');\n  propertiesButton.setToolTip('Properties');\n  propertiesButton.setIcon(\"adsk-icon-properties\");\n  propertiesButton.onClick = function (event) {\n    _this2._panel.setVisible(!_this2._panel.isVisible());\n  };\n  propertiesButton.setVisible(!this.viewer.prefs.openPropertiesOnSelect);\n  this.viewer.settingsTools.addControl(propertiesButton, { index: 1 });\n  this.viewer.settingsTools.propertiesbutton = propertiesButton; // for backwards compatibility, remove in v8.0.0\n};\n\n/**\n    * @private\n    */\nproto._onIsolateEvent = function (event) {\n  if (!this._panel)\n  return;\n  if (this.viewer.prefs.openPropertiesOnSelect || event.nodeIdArray[0] === event.model.getRootId()) {\n    this._panel.setVisible(event.nodeIdArray.length > 0 || this.viewer.impl.selector.hasSelection());\n  }\n};\n\n/**\n    * Opens the panel when a selection is made AND the corresponding preference is true.\n    *\n    * @private\n    */\nproto._onSelectionChangeEvent = function (event) {\n\n  if (!this.viewer.prefs.openPropertiesOnSelect)\n  return;\n\n  var hasSelection = false;\n  for (var i = 0; i < event.selections.length; ++i) {\n    if (event.selections[i].dbIdArray.length > 0) {\n      hasSelection = true;\n      break;\n    }\n  }\n\n  if (hasSelection) {\n    this.activate();\n  } else {\n    this.deactivate();\n  }\n};\n\n/**\n    * Invoked when the preference for whether the Panel gets automatically\n    * opened on selection is true or not.\n    *\n    * @param {boolean} displayOnSelection - true to automatically open the panel when a part is selcted.\n    *\n    * @private\n    */\nproto._onPrefChange = function (displayOnSelection) {\n\n  // When Properties are displayed on selection, \n  // hide the toolbar button (because UX).\n  if (this._toolbarButton) {\n    this._toolbarButton.setVisible(!displayOnSelection);\n  }\n};","\nimport { Extension } from \"../../src/application/Extension\";\nimport { ViewerSettingTab } from \"../../src/gui/ViewerSettingsPanel\";\n\n\n/**\n                                                                       * Use its `activate()` method to open the Settings UI.\n                                                                       * \n                                                                       * The extension id is: `Autodesk.ViewerSettings`\n                                                                       * \n                                                                       * @example\n                                                                       *   viewer.loadExtension('Autodesk.ViewerSettings')\n                                                                       * \n                                                                       * @memberof Autodesk.Viewing.Extensions\n                                                                       * @alias Autodesk.Viewing.Extensions.ViewerSettingsExtension\n                                                                       * @see {@link Autodesk.Viewing.Extension} for common inherited methods.\n                                                                       * @constructor\n                                                                       */\nexport function ViewerSettingsExtension(\n\n\nviewer, options) {\n  Extension.call(this, viewer, options);\n  this.viewer = viewer;\n  this.options = options;\n  this.name = \"viewersettings\";\n}\nViewerSettingsExtension.prototype = Object.create(Extension.prototype);\nViewerSettingsExtension.prototype.constructor = ViewerSettingsExtension;\n\nvar proto = ViewerSettingsExtension.prototype;\n\n/**\n                                                * Opens the Settings UI.\n                                                * \n                                                * @memberof Autodesk.Viewing.Extensions.ViewerSettingsExtension\n                                                * @alias Autodesk.Viewing.Extensions.ViewerSettingsExtension#activate\n                                                */\nproto.activate = function () {\n  if (!this.activeStatus) {\n    this.viewer.showViewer3dOptions(true);\n    var panel = this.viewer.getSettingsPanel(true);\n    panel.selectTab(ViewerSettingTab.Performance);\n    this.activeStatus = true;\n  }\n  return true;\n};\n\n/**\n    * Closes the Settings UI.\n    * \n    * @memberof Autodesk.Viewing.Extensions.ViewerSettingsExtension\n    * @alias Autodesk.Viewing.Extensions.ViewerSettingsExtension#deactivate\n    */\nproto.deactivate = function () {\n  if (this.activeStatus) {\n    this.viewer.showViewer3dOptions(false);\n    this.activeStatus = false;\n  }\n  return true;\n};","\nimport { theExtensionManager } from \"../src/application/ExtensionManager\";\n\nimport { PropertiesManagerExtension } from \"./PropertiesManager/PropertiesManager\";\nimport { ViewerSettingsExtension } from \"./ViewerSettings/ViewerSettings\";\nimport { ModelStructureExtension } from \"./ModelStructure/ModelStructure\";\nimport { NavToolsExtension } from \"./DefaultTools/NavTools\";\nimport { ExplodeExtension } from \"./Explode/Explode\";\nimport { FullScreenExtension } from \"./FullScreen/FullScreen\";\nimport { GoHomeExtension } from \"./GoHome/GoHome\";\nimport { FusionOrbitExtension } from \"./FusionOrbit/FusionOrbit\";\n\n\ntheExtensionManager.registerExtension('Autodesk.PropertiesManager', PropertiesManagerExtension);\ntheExtensionManager.registerExtension('Autodesk.ViewerSettings', ViewerSettingsExtension);\ntheExtensionManager.registerExtension('Autodesk.ModelStructure', ModelStructureExtension);\ntheExtensionManager.registerExtension('Autodesk.DefaultTools.NavTools', NavToolsExtension);\ntheExtensionManager.registerExtension('Autodesk.Explode', ExplodeExtension);\ntheExtensionManager.registerExtension('Autodesk.FullScreen', FullScreenExtension);\ntheExtensionManager.registerExtension('Autodesk.GoHome', GoHomeExtension);\ntheExtensionManager.registerExtension('Autodesk.Viewing.FusionOrbit', FusionOrbitExtension);","\nvar externalExtensions = [\n\n// First is the path to extension's entry point,\n// Second (and all others) are the extension IDs.\n{\n  src: './extensions/Wireframes/Wireframes.js',\n  ids: ['Autodesk.Viewing.Wireframes'] },\n\n{\n  src: './extensions/ZoomWindow/ZoomWindow.js',\n  ids: ['Autodesk.Viewing.ZoomWindow'] },\n\n{\n  src: './extensions/AEC/LibraryExports.js',\n  ids: [\n  'Autodesk.AEC.LevelsExtension',\n  'Autodesk.AEC.HyperlinkExtension',\n  'Autodesk.AEC.DropMeExtension',\n  'Autodesk.AEC.CanvasBookmarkExtension',\n  'Autodesk.AEC.Minimap3DExtension',\n  'Autodesk.AEC.LocationsExtension',\n  'Autodesk.AEC.Hypermodeling'] },\n\n\n{\n  src: './extensions/Pushpins/PushPinExtension.js',\n  ids: ['Autodesk.BIM360.Extension.PushPin'] },\n\n{\n  src: './extensions/Hyperlink/Hyperlink.js',\n  ids: ['Autodesk.Hyperlink'] },\n\n{\n  src: './extensions/Debug/Debug.js',\n  ids: ['Autodesk.Debug'] },\n\n{\n  src: './extensions/BimWalk/BimWalk.js',\n  ids: ['Autodesk.BimWalk'] },\n\n{\n  src: './extensions/Section/Section.js',\n  ids: ['Autodesk.Section'] },\n\n{\n  src: './extensions/CompGeom/index.js',\n  ids: ['Autodesk.CompGeom'] },\n\n{\n  src: './extensions/Snapping/index.js',\n  ids: ['Autodesk.Snapping'] },\n\n{\n  src: './extensions/Beeline/Beeline.js',\n  ids: ['Autodesk.Beeline'] },\n\n{\n  src: './extensions/FirstPerson/FirstPerson.js',\n  ids: ['Autodesk.FirstPerson'] },\n\n{\n  src: './extensions/webVR/webVR.js',\n  ids: ['Autodesk.Viewing.WebVR'] },\n\n{\n  src: './extensions/CAM360/CAM360.js',\n  ids: ['Autodesk.CAM360'] },\n\n{\n  src: './extensions/Collaboration/Collaboration.js',\n  ids: ['Autodesk.Viewing.Collaboration'] },\n\n{\n  src: './extensions/FusionSim/FusionSim.js',\n  ids: ['Autodesk.Fusion360.Simulation'] },\n\n{\n  src: './extensions/OMV/OMV.js',\n  ids: ['Autodesk.OMV'] },\n\n{\n  src: './extensions/SplitScreen/SplitScreen.js',\n  ids: ['Autodesk.SplitScreen'] },\n\n{\n  src: './extensions/CrossFadeEffects/CrossFadeEffects.js',\n  ids: ['Autodesk.CrossFadeEffects'] },\n\n{\n  src: './extensions/Edit2D/Edit2D.js',\n  ids: ['Autodesk.Edit2D'] },\n\n{\n  src: './extensions/Edit3D/Edit3D.js',\n  ids: ['Autodesk.Edit3D'] },\n\n{\n  src: './extensions/VisualClusters/VisualClusters.js',\n  ids: ['Autodesk.VisualClusters'] },\n\n{\n  src: './extensions/Moldflow/Moldflow.js',\n  ids: ['Autodesk.Moldflow'] },\n\n{\n  src: './extensions/PixelCompare/PixelCompare.js',\n  ids: ['Autodesk.Viewing.PixelCompare'] },\n\n{\n  src: './extensions/ScalarisSimulation/ScalarisSimulation.js',\n  ids: ['Autodesk.Viewing.ScalarisSimulation'] },\n\n{\n  src: './extensions/Measure/Measure.js',\n  ids: ['Autodesk.Measure'] },\n\n{\n  src: './extensions/Markup/Markup.js',\n  ids: [\n  'Autodesk.Viewing.MarkupsCore',\n  'Autodesk.Viewing.MarkupsGui'] },\n\n\n{\n  src: './extensions/PDF/index.js',\n  ids: ['Autodesk.PDF'] },\n\n{\n  src: './extensions/ReCap/index.js',\n  ids: ['Autodesk.ReCap'] },\n\n{\n  src: './extensions/Scalaris/index.js',\n  ids: ['Autodesk.Scalaris'] },\n\n{\n  src: './extensions/DocumentBrowser/index.js',\n  ids: ['Autodesk.DocumentBrowser'] },\n\n{\n  src: './extensions/Geolocation/index.js',\n  ids: ['Autodesk.Geolocation'] },\n\n{\n  src: './extensions/Fusion360/AnimationExtension.js',\n  ids: ['Autodesk.Fusion360.Animation'] },\n\n{\n  src: './extensions/NPR/index.js',\n  ids: ['Autodesk.NPR'] },\n\n{\n  src: './extensions/DOF/DOFExtension.js',\n  ids: ['Autodesk.DOF'] },\n\n{\n  src: './extensions/MSDF/index.js',\n  ids: ['Autodesk.MSDF'] },\n\n{\n  src: './extensions/MemoryLimited/MemoryLimited.js',\n  ids: ['Autodesk.MemoryLimited'] },\n\n{\n  src: './extensions/ViewCubeUi/ViewCubeUi.js',\n  ids: ['Autodesk.ViewCubeUi'] },\n\n{\n  src: './extensions/MemoryLimitedDebug/MemoryManager.js',\n  ids: ['Autodesk.Viewing.MemoryLimitedDebug'] },\n\n{\n  src: './extensions/BimMarkups/BimMarkups.js',\n  ids: ['Autodesk.BIM360.Markups'] },\n\n{\n  src: './extensions/Minimap2D/Minimap2D.js',\n  ids: ['Autodesk.BIM360.Minimap'] },\n\n{\n  src: './extensions/GestureDocumentNavigation/GestureDocumentNavigation.js',\n  ids: ['Autodesk.BIM360.GestureDocumentNavigation'] },\n\n{\n  src: './extensions/RollCamera/RollCamera.js',\n  ids: ['Autodesk.BIM360.RollCamera'] },\n\n{\n  src: './extensions/LayerManager/LayerManager.js',\n  ids: ['Autodesk.LayerManager'] },\n\n{\n  src: './extensions/SceneBuilder/sceneBuilder.js',\n  ids: ['Autodesk.Viewing.SceneBuilder'] },\n\n{\n  src: './extensions/Popout/index.js',\n  ids: ['Autodesk.Viewing.Popout'] },\n\n{\n  src: './extensions/ProfileUi/index.js',\n  ids: ['Autodesk.ProfileUi'] },\n\n{\n  src: './extensions/PropertySearch/PropertySearch.js',\n  ids: ['Autodesk.PropertySearch'] },\n\n{\n  src: './extensions/StandardSurface/index.js',\n  ids: ['Autodesk.StandardSurface'] },\n\n{\n  src: './extensions/MaterialConverterPrism/index.js',\n  ids: ['Autodesk.Viewing.MaterialConverterPrism'] },\n\n{\n  src: './extensions/DWF/index.js',\n  ids: ['Autodesk.DWF'] },\n\n{\n  src: './extensions/ModelsPanel/index.js',\n  ids: ['Autodesk.ModelsPanel'] },\n\n{\n  src: './extensions/ModelAlignment/index.js',\n  ids: ['Autodesk.ModelAlignment', 'Autodesk.SheetAlignment'],\n  dependencies: ['Autodesk.Edit3D'] },\n\n{\n  src: './extensions/ModelAlignmentService/ModelAlignmentService.js',\n  ids: ['Autodesk.ModelAlignmentService'] },\n\n{\n  src: './extensions/MixpanelProvider/index.js',\n  ids: ['Autodesk.Viewing.MixpanelExtension'] },\n\n{\n  src: './extensions/Crop/Crop.js',\n  ids: ['Autodesk.Crop'] },\n\n{\n  src: './extensions/DataVisualization/index.js',\n  ids: ['Autodesk.DataVisualization'] },\n\n{\n  src: './extensions/StringExtractor/StringExtractor.js',\n  ids: ['Autodesk.StringExtractor'] },\n\n{\n  src: './extensions/ModelSheetTransition/ModelSheetTransition.js',\n  ids: ['Autodesk.ModelSheetTransition'] },\n\n{\n  src: './extensions/BoxSelection/BoxSelectionExtension.js',\n  ids: ['Autodesk.BoxSelection'] }];\n\n\n\nfunction getExtensionEntryKey(ee) {\n  // Given ee.src == './extensions/Something/file.js'\n  // then key == 'Something'\n  var key = ee.src.split('/')[2];\n  return key;\n}\n\nmodule.exports = {\n  externalExtensions: externalExtensions,\n  getExtensionEntryKey: getExtensionEntryKey };","\nimport { theExtensionManager } from \"../src/application/ExtensionManager\";\nimport { externalExtensions, getExtensionEntryKey } from './externalExtensions';\n\n\nvar ext = BUILD_FLAG__MINIFIED_BUILD ? 'min.js' : 'js';\n\n// Register them all\nexternalExtensions.forEach(function (ee) {\n\n  var key = getExtensionEntryKey(ee);\n  var filePath = \"extensions/\".concat(key, \"/\").concat(key, \".\").concat(ext);\n  var dependencies = ee.dependencies;\n  ee.ids.forEach(function (id) {\n    theExtensionManager.registerExternalExtension(id, filePath, dependencies);\n  });\n});\n\n\nif (BUILD_FLAG__DIFF_TOOL) {\n  // Not available in externalExtensions.js\n  theExtensionManager.registerExternalExtension('Autodesk.DiffTool', \"extensions/DiffTool/DiffTool.\".concat(ext));\n}","/* Clusterize.js - v0.18.1 - 2018-01-02\n http://NeXTs.github.com/Clusterize.js/\n Copyright (c) 2015 Denis Lukov; Licensed GPLv3 */\n\n;(function(name, definition) {\n    if (typeof module != 'undefined') module.exports = definition();\n    else if (typeof define == 'function' && typeof define.amd == 'object') define(definition);\n    else this[name] = definition();\n}('Clusterize', function() {\n  \"use strict\"\n\n  // detect ie9 and lower\n  // https://gist.github.com/padolsey/527683#comment-786682\n  var ie = (function(){\n    for( var v = 3,\n             el = document.createElement('b'),\n             all = el.all || [];\n         el.innerHTML = '<!--[if gt IE ' + (++v) + ']><i><![endif]-->',\n         all[0];\n       ){}\n    return v > 4 ? v : document.documentMode;\n  }()),\n  is_mac = navigator.platform.toLowerCase().indexOf('mac') + 1;\n  var Clusterize = function(data) {\n    if( ! (this instanceof Clusterize))\n      return new Clusterize(data);\n    var self = this;\n\n    var defaults = {\n      rows_in_block: 50,\n      blocks_in_cluster: 4,\n      tag: null,\n      show_no_data_row: true,\n      no_data_class: 'clusterize-no-data',\n      no_data_text: 'No data',\n      keep_parity: true,\n      callbacks: {}\n    }\n\n    // public parameters\n    self.options = {};\n    var options = ['rows_in_block', 'blocks_in_cluster', 'show_no_data_row', 'no_data_class', 'no_data_text', 'keep_parity', 'tag', 'callbacks'];\n    for(var i = 0, option; option = options[i]; i++) {\n      self.options[option] = typeof data[option] != 'undefined' && data[option] != null\n        ? data[option]\n        : defaults[option];\n    }\n\n    var elems = ['scroll', 'content'];\n    for(var i = 0, elem; elem = elems[i]; i++) {\n      self[elem + '_elem'] = data[elem + 'Id']\n        ? document.getElementById(data[elem + 'Id'])\n        : data[elem + 'Elem'];\n      if( ! self[elem + '_elem'])\n        throw new Error(\"Error! Could not find \" + elem + \" element\");\n    }\n\n    // tabindex forces the browser to keep focus on the scrolling list, fixes #11\n    if( ! self.content_elem.hasAttribute('tabindex'))\n      self.content_elem.setAttribute('tabindex', 0);\n\n    // private parameters\n    var rows = isArray(data.rows)\n        ? data.rows\n        : self.fetchMarkup(),\n      cache = {},\n      scroll_top = self.scroll_elem.scrollTop;\n\n    // append initial data\n    self.insertToDOM(rows, cache);\n\n    // restore the scroll position\n    self.scroll_elem.scrollTop = scroll_top;\n\n    // adding scroll handler\n    var last_cluster = false,\n    scroll_debounce = 0,\n    pointer_events_set = false,\n    scrollEv = function() {\n      // fixes scrolling issue on Mac #3\n      if (is_mac) {\n          if( ! pointer_events_set) self.content_elem.style.pointerEvents = 'none';\n          pointer_events_set = true;\n          clearTimeout(scroll_debounce);\n          scroll_debounce = setTimeout(function () {\n              self.content_elem.style.pointerEvents = 'auto';\n              pointer_events_set = false;\n          }, 50);\n      }\n      if (last_cluster != (last_cluster = self.getClusterNum()))\n        self.insertToDOM(rows, cache);\n      if (self.options.callbacks.scrollingProgress)\n        self.options.callbacks.scrollingProgress(self.getScrollProgress());\n    },\n    resize_debounce = 0,\n    resizeEv = function() {\n      clearTimeout(resize_debounce);\n      resize_debounce = setTimeout(self.refresh, 100);\n    }\n    on('scroll', self.scroll_elem, scrollEv);\n    on('resize', window, resizeEv);\n\n    // public methods\n    self.destroy = function(clean) {\n      off('scroll', self.scroll_elem, scrollEv);\n      off('resize', window, resizeEv);\n      self.html((clean ? self.generateEmptyRow() : rows).join(''));\n    }\n    self.refresh = function(force) {\n      if(self.getRowsHeight(rows) || force) self.update(rows);\n    }\n    self.update = function(new_rows) {\n      rows = isArray(new_rows)\n        ? new_rows\n        : [];\n      var scroll_top = self.scroll_elem.scrollTop;\n      // fixes #39\n      if(rows.length * self.options.item_height < scroll_top) {\n        self.scroll_elem.scrollTop = 0;\n        last_cluster = 0;\n      }\n      self.insertToDOM(rows, cache);\n      self.scroll_elem.scrollTop = scroll_top;\n    }\n    self.clear = function() {\n      self.update([]);\n    }\n    self.getRowsAmount = function() {\n      return rows.length;\n    }\n    self.getScrollProgress = function() {\n      return this.options.scroll_top / (rows.length * this.options.item_height) * 100 || 0;\n    }\n\n    var add = function(where, _new_rows) {\n      var new_rows = isArray(_new_rows)\n        ? _new_rows\n        : [];\n      if( ! new_rows.length) return;\n      rows = where == 'append'\n        ? rows.concat(new_rows)\n        : new_rows.concat(rows);\n      self.insertToDOM(rows, cache);\n    }\n    self.append = function(rows) {\n      add('append', rows);\n    }\n    self.prepend = function(rows) {\n      add('prepend', rows);\n    }\n  }\n\n  Clusterize.prototype = {\n    constructor: Clusterize,\n    // fetch existing markup\n    fetchMarkup: function() {\n      var rows = [], rows_nodes = this.getChildNodes(this.content_elem);\n      while (rows_nodes.length) {\n        rows.push(rows_nodes.shift().outerHTML);\n      }\n      return rows;\n    },\n    // get tag name, content tag name, tag height, calc cluster height\n    exploreEnvironment: function(rows, cache) {\n      var opts = this.options;\n      opts.content_tag = this.content_elem.tagName.toLowerCase();\n      if( ! rows.length) return;\n      if(ie && ie <= 9 && ! opts.tag) opts.tag = rows[0].match(/<([^>\\s/]*)/)[1].toLowerCase();\n      if(this.content_elem.children.length <= 1) cache.data = this.html(rows[0] + rows[0] + rows[0]);\n      if( ! opts.tag) opts.tag = this.content_elem.children[0].tagName.toLowerCase();\n      this.getRowsHeight(rows);\n    },\n    getRowsHeight: function(rows) {\n      var opts = this.options,\n        prev_item_height = opts.item_height;\n      opts.cluster_height = 0;\n      if( ! rows.length) return;\n      var nodes = this.content_elem.children;\n      if( ! nodes.length) return;\n      var node = nodes[Math.floor(nodes.length / 2)];\n      opts.item_height = node.offsetHeight;\n      // consider table's border-spacing\n      if(opts.tag == 'tr' && getStyle('borderCollapse', this.content_elem) != 'collapse')\n        opts.item_height += parseInt(getStyle('borderSpacing', this.content_elem), 10) || 0;\n      // consider margins (and margins collapsing)\n      if(opts.tag != 'tr') {\n        var marginTop = parseInt(getStyle('marginTop', node), 10) || 0;\n        var marginBottom = parseInt(getStyle('marginBottom', node), 10) || 0;\n        opts.item_height += Math.max(marginTop, marginBottom);\n      }\n      opts.block_height = opts.item_height * opts.rows_in_block;\n      opts.rows_in_cluster = opts.blocks_in_cluster * opts.rows_in_block;\n      opts.cluster_height = opts.blocks_in_cluster * opts.block_height;\n      return prev_item_height != opts.item_height;\n    },\n    // get current cluster number\n    getClusterNum: function () {\n      this.options.scroll_top = this.scroll_elem.scrollTop;\n      return Math.floor(this.options.scroll_top / (this.options.cluster_height - this.options.block_height)) || 0;\n    },\n    // generate empty row if no data provided\n    generateEmptyRow: function() {\n      var opts = this.options;\n      if( ! opts.tag || ! opts.show_no_data_row) return [];\n      var empty_row = document.createElement(opts.tag),\n        no_data_content = document.createTextNode(opts.no_data_text), td;\n      empty_row.className = opts.no_data_class;\n      if(opts.tag == 'tr') {\n        td = document.createElement('td');\n        // fixes #53\n        td.colSpan = 100;\n        td.appendChild(no_data_content);\n      }\n      empty_row.appendChild(td || no_data_content);\n      return [empty_row.outerHTML];\n    },\n    // generate cluster for current scroll position\n    generate: function (rows, cluster_num) {\n      var opts = this.options,\n        rows_len = rows.length;\n      if (rows_len < opts.rows_in_block) {\n        return {\n          top_offset: 0,\n          bottom_offset: 0,\n          rows_above: 0,\n          rows: rows_len ? rows : this.generateEmptyRow()\n        }\n      }\n      var items_start = Math.max((opts.rows_in_cluster - opts.rows_in_block) * cluster_num, 0),\n        items_end = items_start + opts.rows_in_cluster,\n        top_offset = Math.max(items_start * opts.item_height, 0),\n        bottom_offset = Math.max((rows_len - items_end) * opts.item_height, 0),\n        this_cluster_rows = [],\n        rows_above = items_start;\n      if(top_offset < 1) {\n        rows_above++;\n      }\n      for (var i = items_start; i < items_end; i++) {\n        rows[i] && this_cluster_rows.push(rows[i]);\n      }\n      return {\n        top_offset: top_offset,\n        bottom_offset: bottom_offset,\n        rows_above: rows_above,\n        rows: this_cluster_rows\n      }\n    },\n    renderExtraTag: function(class_name, height) {\n      var tag = document.createElement(this.options.tag),\n        clusterize_prefix = 'clusterize-';\n      tag.className = [clusterize_prefix + 'extra-row', clusterize_prefix + class_name].join(' ');\n      height && (tag.style.height = height + 'px');\n      return tag.outerHTML;\n    },\n    // if necessary verify data changed and insert to DOM\n    insertToDOM: function(rows, cache) {\n      // explore row's height\n      if( ! this.options.cluster_height) {\n        this.exploreEnvironment(rows, cache);\n      }\n      var data = this.generate(rows, this.getClusterNum()),\n        this_cluster_rows = data.rows.join(''),\n        this_cluster_content_changed = this.checkChanges('data', this_cluster_rows, cache),\n        top_offset_changed = this.checkChanges('top', data.top_offset, cache),\n        only_bottom_offset_changed = this.checkChanges('bottom', data.bottom_offset, cache),\n        callbacks = this.options.callbacks,\n        layout = [];\n\n      if(this_cluster_content_changed || top_offset_changed) {\n        if(data.top_offset) {\n          this.options.keep_parity && layout.push(this.renderExtraTag('keep-parity'));\n          layout.push(this.renderExtraTag('top-space', data.top_offset));\n        }\n        layout.push(this_cluster_rows);\n        data.bottom_offset && layout.push(this.renderExtraTag('bottom-space', data.bottom_offset));\n        callbacks.clusterWillChange && callbacks.clusterWillChange();\n        this.html(layout.join(''));\n        this.options.content_tag == 'ol' && this.content_elem.setAttribute('start', data.rows_above);\n        this.content_elem.style['counter-increment'] = 'clusterize-counter ' + (data.rows_above-1);\n        callbacks.clusterChanged && callbacks.clusterChanged();\n      } else if(only_bottom_offset_changed) {\n        this.content_elem.lastChild.style.height = data.bottom_offset + 'px';\n      }\n    },\n    // unfortunately ie <= 9 does not allow to use innerHTML for table elements, so make a workaround\n    html: function(data) {\n      var content_elem = this.content_elem;\n      if(ie && ie <= 9 && this.options.tag == 'tr') {\n        var div = document.createElement('div'), last;\n        div.innerHTML = '<table><tbody>' + data + '</tbody></table>';\n        while((last = content_elem.lastChild)) {\n          content_elem.removeChild(last);\n        }\n        var rows_nodes = this.getChildNodes(div.firstChild.firstChild);\n        while (rows_nodes.length) {\n          content_elem.appendChild(rows_nodes.shift());\n        }\n      } else {\n        content_elem.innerHTML = data;\n      }\n    },\n    getChildNodes: function(tag) {\n        var child_nodes = tag.children, nodes = [];\n        for (var i = 0, ii = child_nodes.length; i < ii; i++) {\n            nodes.push(child_nodes[i]);\n        }\n        return nodes;\n    },\n    checkChanges: function(type, value, cache) {\n      var changed = value != cache[type];\n      cache[type] = value;\n      return changed;\n    }\n  }\n\n  // support functions\n  function on(evt, element, fnc) {\n    return element.addEventListener ? element.addEventListener(evt, fnc, false) : element.attachEvent(\"on\" + evt, fnc);\n  }\n  function off(evt, element, fnc) {\n    return element.removeEventListener ? element.removeEventListener(evt, fnc, false) : element.detachEvent(\"on\" + evt, fnc);\n  }\n  function isArray(arr) {\n    return Object.prototype.toString.call(arr) === '[object Array]';\n  }\n  function getStyle(prop, elem) {\n    return window.getComputedStyle ? window.getComputedStyle(elem)[prop] : elem.currentStyle[prop];\n  }\n\n  return Clusterize;\n}));","module.exports = function (it) {\n  if (typeof it != 'function') {\n    throw TypeError(String(it) + ' is not a function');\n  } return it;\n};\n","var isObject = require('../internals/is-object');\n\nmodule.exports = function (it) {\n  if (!isObject(it) && it !== null) {\n    throw TypeError(\"Can't set \" + String(it) + ' as a prototype');\n  } return it;\n};\n","var wellKnownSymbol = require('../internals/well-known-symbol');\nvar create = require('../internals/object-create');\nvar definePropertyModule = require('../internals/object-define-property');\n\nvar UNSCOPABLES = wellKnownSymbol('unscopables');\nvar ArrayPrototype = Array.prototype;\n\n// Array.prototype[@@unscopables]\n// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables\nif (ArrayPrototype[UNSCOPABLES] == undefined) {\n  definePropertyModule.f(ArrayPrototype, UNSCOPABLES, {\n    configurable: true,\n    value: create(null)\n  });\n}\n\n// add a key to Array.prototype[@@unscopables]\nmodule.exports = function (key) {\n  ArrayPrototype[UNSCOPABLES][key] = true;\n};\n","'use strict';\nvar charAt = require('../internals/string-multibyte').charAt;\n\n// `AdvanceStringIndex` abstract operation\n// https://tc39.github.io/ecma262/#sec-advancestringindex\nmodule.exports = function (S, index, unicode) {\n  return index + (unicode ? charAt(S, index).length : 1);\n};\n","module.exports = function (it, Constructor, name) {\n  if (!(it instanceof Constructor)) {\n    throw TypeError('Incorrect ' + (name ? name + ' ' : '') + 'invocation');\n  } return it;\n};\n","var isObject = require('../internals/is-object');\n\nmodule.exports = function (it) {\n  if (!isObject(it)) {\n    throw TypeError(String(it) + ' is not an object');\n  } return it;\n};\n","module.exports = typeof ArrayBuffer !== 'undefined' && typeof DataView !== 'undefined';\n","'use strict';\nvar NATIVE_ARRAY_BUFFER = require('../internals/array-buffer-native');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar global = require('../internals/global');\nvar isObject = require('../internals/is-object');\nvar has = require('../internals/has');\nvar classof = require('../internals/classof');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar redefine = require('../internals/redefine');\nvar defineProperty = require('../internals/object-define-property').f;\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\nvar setPrototypeOf = require('../internals/object-set-prototype-of');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar uid = require('../internals/uid');\n\nvar Int8Array = global.Int8Array;\nvar Int8ArrayPrototype = Int8Array && Int8Array.prototype;\nvar Uint8ClampedArray = global.Uint8ClampedArray;\nvar Uint8ClampedArrayPrototype = Uint8ClampedArray && Uint8ClampedArray.prototype;\nvar TypedArray = Int8Array && getPrototypeOf(Int8Array);\nvar TypedArrayPrototype = Int8ArrayPrototype && getPrototypeOf(Int8ArrayPrototype);\nvar ObjectPrototype = Object.prototype;\nvar isPrototypeOf = ObjectPrototype.isPrototypeOf;\n\nvar TO_STRING_TAG = wellKnownSymbol('toStringTag');\nvar TYPED_ARRAY_TAG = uid('TYPED_ARRAY_TAG');\n// Fixing native typed arrays in Opera Presto crashes the browser, see #595\nvar NATIVE_ARRAY_BUFFER_VIEWS = NATIVE_ARRAY_BUFFER && !!setPrototypeOf && classof(global.opera) !== 'Opera';\nvar TYPED_ARRAY_TAG_REQIRED = false;\nvar NAME;\n\nvar TypedArrayConstructorsList = {\n  Int8Array: 1,\n  Uint8Array: 1,\n  Uint8ClampedArray: 1,\n  Int16Array: 2,\n  Uint16Array: 2,\n  Int32Array: 4,\n  Uint32Array: 4,\n  Float32Array: 4,\n  Float64Array: 8\n};\n\nvar isView = function isView(it) {\n  var klass = classof(it);\n  return klass === 'DataView' || has(TypedArrayConstructorsList, klass);\n};\n\nvar isTypedArray = function (it) {\n  return isObject(it) && has(TypedArrayConstructorsList, classof(it));\n};\n\nvar aTypedArray = function (it) {\n  if (isTypedArray(it)) return it;\n  throw TypeError('Target is not a typed array');\n};\n\nvar aTypedArrayConstructor = function (C) {\n  if (setPrototypeOf) {\n    if (isPrototypeOf.call(TypedArray, C)) return C;\n  } else for (var ARRAY in TypedArrayConstructorsList) if (has(TypedArrayConstructorsList, NAME)) {\n    var TypedArrayConstructor = global[ARRAY];\n    if (TypedArrayConstructor && (C === TypedArrayConstructor || isPrototypeOf.call(TypedArrayConstructor, C))) {\n      return C;\n    }\n  } throw TypeError('Target is not a typed array constructor');\n};\n\nvar exportTypedArrayMethod = function (KEY, property, forced) {\n  if (!DESCRIPTORS) return;\n  if (forced) for (var ARRAY in TypedArrayConstructorsList) {\n    var TypedArrayConstructor = global[ARRAY];\n    if (TypedArrayConstructor && has(TypedArrayConstructor.prototype, KEY)) {\n      delete TypedArrayConstructor.prototype[KEY];\n    }\n  }\n  if (!TypedArrayPrototype[KEY] || forced) {\n    redefine(TypedArrayPrototype, KEY, forced ? property\n      : NATIVE_ARRAY_BUFFER_VIEWS && Int8ArrayPrototype[KEY] || property);\n  }\n};\n\nvar exportTypedArrayStaticMethod = function (KEY, property, forced) {\n  var ARRAY, TypedArrayConstructor;\n  if (!DESCRIPTORS) return;\n  if (setPrototypeOf) {\n    if (forced) for (ARRAY in TypedArrayConstructorsList) {\n      TypedArrayConstructor = global[ARRAY];\n      if (TypedArrayConstructor && has(TypedArrayConstructor, KEY)) {\n        delete TypedArrayConstructor[KEY];\n      }\n    }\n    if (!TypedArray[KEY] || forced) {\n      // V8 ~ Chrome 49-50 `%TypedArray%` methods are non-writable non-configurable\n      try {\n        return redefine(TypedArray, KEY, forced ? property : NATIVE_ARRAY_BUFFER_VIEWS && Int8Array[KEY] || property);\n      } catch (error) { /* empty */ }\n    } else return;\n  }\n  for (ARRAY in TypedArrayConstructorsList) {\n    TypedArrayConstructor = global[ARRAY];\n    if (TypedArrayConstructor && (!TypedArrayConstructor[KEY] || forced)) {\n      redefine(TypedArrayConstructor, KEY, property);\n    }\n  }\n};\n\nfor (NAME in TypedArrayConstructorsList) {\n  if (!global[NAME]) NATIVE_ARRAY_BUFFER_VIEWS = false;\n}\n\n// WebKit bug - typed arrays constructors prototype is Object.prototype\nif (!NATIVE_ARRAY_BUFFER_VIEWS || typeof TypedArray != 'function' || TypedArray === Function.prototype) {\n  // eslint-disable-next-line no-shadow\n  TypedArray = function TypedArray() {\n    throw TypeError('Incorrect invocation');\n  };\n  if (NATIVE_ARRAY_BUFFER_VIEWS) for (NAME in TypedArrayConstructorsList) {\n    if (global[NAME]) setPrototypeOf(global[NAME], TypedArray);\n  }\n}\n\nif (!NATIVE_ARRAY_BUFFER_VIEWS || !TypedArrayPrototype || TypedArrayPrototype === ObjectPrototype) {\n  TypedArrayPrototype = TypedArray.prototype;\n  if (NATIVE_ARRAY_BUFFER_VIEWS) for (NAME in TypedArrayConstructorsList) {\n    if (global[NAME]) setPrototypeOf(global[NAME].prototype, TypedArrayPrototype);\n  }\n}\n\n// WebKit bug - one more object in Uint8ClampedArray prototype chain\nif (NATIVE_ARRAY_BUFFER_VIEWS && getPrototypeOf(Uint8ClampedArrayPrototype) !== TypedArrayPrototype) {\n  setPrototypeOf(Uint8ClampedArrayPrototype, TypedArrayPrototype);\n}\n\nif (DESCRIPTORS && !has(TypedArrayPrototype, TO_STRING_TAG)) {\n  TYPED_ARRAY_TAG_REQIRED = true;\n  defineProperty(TypedArrayPrototype, TO_STRING_TAG, { get: function () {\n    return isObject(this) ? this[TYPED_ARRAY_TAG] : undefined;\n  } });\n  for (NAME in TypedArrayConstructorsList) if (global[NAME]) {\n    createNonEnumerableProperty(global[NAME], TYPED_ARRAY_TAG, NAME);\n  }\n}\n\nmodule.exports = {\n  NATIVE_ARRAY_BUFFER_VIEWS: NATIVE_ARRAY_BUFFER_VIEWS,\n  TYPED_ARRAY_TAG: TYPED_ARRAY_TAG_REQIRED && TYPED_ARRAY_TAG,\n  aTypedArray: aTypedArray,\n  aTypedArrayConstructor: aTypedArrayConstructor,\n  exportTypedArrayMethod: exportTypedArrayMethod,\n  exportTypedArrayStaticMethod: exportTypedArrayStaticMethod,\n  isView: isView,\n  isTypedArray: isTypedArray,\n  TypedArray: TypedArray,\n  TypedArrayPrototype: TypedArrayPrototype\n};\n","'use strict';\nvar global = require('../internals/global');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar NATIVE_ARRAY_BUFFER = require('../internals/array-buffer-native');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar redefineAll = require('../internals/redefine-all');\nvar fails = require('../internals/fails');\nvar anInstance = require('../internals/an-instance');\nvar toInteger = require('../internals/to-integer');\nvar toLength = require('../internals/to-length');\nvar toIndex = require('../internals/to-index');\nvar IEEE754 = require('../internals/ieee754');\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\nvar setPrototypeOf = require('../internals/object-set-prototype-of');\nvar getOwnPropertyNames = require('../internals/object-get-own-property-names').f;\nvar defineProperty = require('../internals/object-define-property').f;\nvar arrayFill = require('../internals/array-fill');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar InternalStateModule = require('../internals/internal-state');\n\nvar getInternalState = InternalStateModule.get;\nvar setInternalState = InternalStateModule.set;\nvar ARRAY_BUFFER = 'ArrayBuffer';\nvar DATA_VIEW = 'DataView';\nvar PROTOTYPE = 'prototype';\nvar WRONG_LENGTH = 'Wrong length';\nvar WRONG_INDEX = 'Wrong index';\nvar NativeArrayBuffer = global[ARRAY_BUFFER];\nvar $ArrayBuffer = NativeArrayBuffer;\nvar $DataView = global[DATA_VIEW];\nvar $DataViewPrototype = $DataView && $DataView[PROTOTYPE];\nvar ObjectPrototype = Object.prototype;\nvar RangeError = global.RangeError;\n\nvar packIEEE754 = IEEE754.pack;\nvar unpackIEEE754 = IEEE754.unpack;\n\nvar packInt8 = function (number) {\n  return [number & 0xFF];\n};\n\nvar packInt16 = function (number) {\n  return [number & 0xFF, number >> 8 & 0xFF];\n};\n\nvar packInt32 = function (number) {\n  return [number & 0xFF, number >> 8 & 0xFF, number >> 16 & 0xFF, number >> 24 & 0xFF];\n};\n\nvar unpackInt32 = function (buffer) {\n  return buffer[3] << 24 | buffer[2] << 16 | buffer[1] << 8 | buffer[0];\n};\n\nvar packFloat32 = function (number) {\n  return packIEEE754(number, 23, 4);\n};\n\nvar packFloat64 = function (number) {\n  return packIEEE754(number, 52, 8);\n};\n\nvar addGetter = function (Constructor, key) {\n  defineProperty(Constructor[PROTOTYPE], key, { get: function () { return getInternalState(this)[key]; } });\n};\n\nvar get = function (view, count, index, isLittleEndian) {\n  var intIndex = toIndex(index);\n  var store = getInternalState(view);\n  if (intIndex + count > store.byteLength) throw RangeError(WRONG_INDEX);\n  var bytes = getInternalState(store.buffer).bytes;\n  var start = intIndex + store.byteOffset;\n  var pack = bytes.slice(start, start + count);\n  return isLittleEndian ? pack : pack.reverse();\n};\n\nvar set = function (view, count, index, conversion, value, isLittleEndian) {\n  var intIndex = toIndex(index);\n  var store = getInternalState(view);\n  if (intIndex + count > store.byteLength) throw RangeError(WRONG_INDEX);\n  var bytes = getInternalState(store.buffer).bytes;\n  var start = intIndex + store.byteOffset;\n  var pack = conversion(+value);\n  for (var i = 0; i < count; i++) bytes[start + i] = pack[isLittleEndian ? i : count - i - 1];\n};\n\nif (!NATIVE_ARRAY_BUFFER) {\n  $ArrayBuffer = function ArrayBuffer(length) {\n    anInstance(this, $ArrayBuffer, ARRAY_BUFFER);\n    var byteLength = toIndex(length);\n    setInternalState(this, {\n      bytes: arrayFill.call(new Array(byteLength), 0),\n      byteLength: byteLength\n    });\n    if (!DESCRIPTORS) this.byteLength = byteLength;\n  };\n\n  $DataView = function DataView(buffer, byteOffset, byteLength) {\n    anInstance(this, $DataView, DATA_VIEW);\n    anInstance(buffer, $ArrayBuffer, DATA_VIEW);\n    var bufferLength = getInternalState(buffer).byteLength;\n    var offset = toInteger(byteOffset);\n    if (offset < 0 || offset > bufferLength) throw RangeError('Wrong offset');\n    byteLength = byteLength === undefined ? bufferLength - offset : toLength(byteLength);\n    if (offset + byteLength > bufferLength) throw RangeError(WRONG_LENGTH);\n    setInternalState(this, {\n      buffer: buffer,\n      byteLength: byteLength,\n      byteOffset: offset\n    });\n    if (!DESCRIPTORS) {\n      this.buffer = buffer;\n      this.byteLength = byteLength;\n      this.byteOffset = offset;\n    }\n  };\n\n  if (DESCRIPTORS) {\n    addGetter($ArrayBuffer, 'byteLength');\n    addGetter($DataView, 'buffer');\n    addGetter($DataView, 'byteLength');\n    addGetter($DataView, 'byteOffset');\n  }\n\n  redefineAll($DataView[PROTOTYPE], {\n    getInt8: function getInt8(byteOffset) {\n      return get(this, 1, byteOffset)[0] << 24 >> 24;\n    },\n    getUint8: function getUint8(byteOffset) {\n      return get(this, 1, byteOffset)[0];\n    },\n    getInt16: function getInt16(byteOffset /* , littleEndian */) {\n      var bytes = get(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);\n      return (bytes[1] << 8 | bytes[0]) << 16 >> 16;\n    },\n    getUint16: function getUint16(byteOffset /* , littleEndian */) {\n      var bytes = get(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);\n      return bytes[1] << 8 | bytes[0];\n    },\n    getInt32: function getInt32(byteOffset /* , littleEndian */) {\n      return unpackInt32(get(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined));\n    },\n    getUint32: function getUint32(byteOffset /* , littleEndian */) {\n      return unpackInt32(get(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined)) >>> 0;\n    },\n    getFloat32: function getFloat32(byteOffset /* , littleEndian */) {\n      return unpackIEEE754(get(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 23);\n    },\n    getFloat64: function getFloat64(byteOffset /* , littleEndian */) {\n      return unpackIEEE754(get(this, 8, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 52);\n    },\n    setInt8: function setInt8(byteOffset, value) {\n      set(this, 1, byteOffset, packInt8, value);\n    },\n    setUint8: function setUint8(byteOffset, value) {\n      set(this, 1, byteOffset, packInt8, value);\n    },\n    setInt16: function setInt16(byteOffset, value /* , littleEndian */) {\n      set(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);\n    },\n    setUint16: function setUint16(byteOffset, value /* , littleEndian */) {\n      set(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);\n    },\n    setInt32: function setInt32(byteOffset, value /* , littleEndian */) {\n      set(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);\n    },\n    setUint32: function setUint32(byteOffset, value /* , littleEndian */) {\n      set(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);\n    },\n    setFloat32: function setFloat32(byteOffset, value /* , littleEndian */) {\n      set(this, 4, byteOffset, packFloat32, value, arguments.length > 2 ? arguments[2] : undefined);\n    },\n    setFloat64: function setFloat64(byteOffset, value /* , littleEndian */) {\n      set(this, 8, byteOffset, packFloat64, value, arguments.length > 2 ? arguments[2] : undefined);\n    }\n  });\n} else {\n  if (!fails(function () {\n    NativeArrayBuffer(1);\n  }) || !fails(function () {\n    new NativeArrayBuffer(-1); // eslint-disable-line no-new\n  }) || fails(function () {\n    new NativeArrayBuffer(); // eslint-disable-line no-new\n    new NativeArrayBuffer(1.5); // eslint-disable-line no-new\n    new NativeArrayBuffer(NaN); // eslint-disable-line no-new\n    return NativeArrayBuffer.name != ARRAY_BUFFER;\n  })) {\n    $ArrayBuffer = function ArrayBuffer(length) {\n      anInstance(this, $ArrayBuffer);\n      return new NativeArrayBuffer(toIndex(length));\n    };\n    var ArrayBufferPrototype = $ArrayBuffer[PROTOTYPE] = NativeArrayBuffer[PROTOTYPE];\n    for (var keys = getOwnPropertyNames(NativeArrayBuffer), j = 0, key; keys.length > j;) {\n      if (!((key = keys[j++]) in $ArrayBuffer)) {\n        createNonEnumerableProperty($ArrayBuffer, key, NativeArrayBuffer[key]);\n      }\n    }\n    ArrayBufferPrototype.constructor = $ArrayBuffer;\n  }\n\n  // WebKit bug - the same parent prototype for typed arrays and data view\n  if (setPrototypeOf && getPrototypeOf($DataViewPrototype) !== ObjectPrototype) {\n    setPrototypeOf($DataViewPrototype, ObjectPrototype);\n  }\n\n  // iOS Safari 7.x bug\n  var testView = new $DataView(new $ArrayBuffer(2));\n  var nativeSetInt8 = $DataViewPrototype.setInt8;\n  testView.setInt8(0, 2147483648);\n  testView.setInt8(1, 2147483649);\n  if (testView.getInt8(0) || !testView.getInt8(1)) redefineAll($DataViewPrototype, {\n    setInt8: function setInt8(byteOffset, value) {\n      nativeSetInt8.call(this, byteOffset, value << 24 >> 24);\n    },\n    setUint8: function setUint8(byteOffset, value) {\n      nativeSetInt8.call(this, byteOffset, value << 24 >> 24);\n    }\n  }, { unsafe: true });\n}\n\nsetToStringTag($ArrayBuffer, ARRAY_BUFFER);\nsetToStringTag($DataView, DATA_VIEW);\n\nmodule.exports = {\n  ArrayBuffer: $ArrayBuffer,\n  DataView: $DataView\n};\n","'use strict';\nvar toObject = require('../internals/to-object');\nvar toAbsoluteIndex = require('../internals/to-absolute-index');\nvar toLength = require('../internals/to-length');\n\nvar min = Math.min;\n\n// `Array.prototype.copyWithin` method implementation\n// https://tc39.github.io/ecma262/#sec-array.prototype.copywithin\nmodule.exports = [].copyWithin || function copyWithin(target /* = 0 */, start /* = 0, end = @length */) {\n  var O = toObject(this);\n  var len = toLength(O.length);\n  var to = toAbsoluteIndex(target, len);\n  var from = toAbsoluteIndex(start, len);\n  var end = arguments.length > 2 ? arguments[2] : undefined;\n  var count = min((end === undefined ? len : toAbsoluteIndex(end, len)) - from, len - to);\n  var inc = 1;\n  if (from < to && to < from + count) {\n    inc = -1;\n    from += count - 1;\n    to += count - 1;\n  }\n  while (count-- > 0) {\n    if (from in O) O[to] = O[from];\n    else delete O[to];\n    to += inc;\n    from += inc;\n  } return O;\n};\n","'use strict';\nvar toObject = require('../internals/to-object');\nvar toAbsoluteIndex = require('../internals/to-absolute-index');\nvar toLength = require('../internals/to-length');\n\n// `Array.prototype.fill` method implementation\n// https://tc39.github.io/ecma262/#sec-array.prototype.fill\nmodule.exports = function fill(value /* , start = 0, end = @length */) {\n  var O = toObject(this);\n  var length = toLength(O.length);\n  var argumentsLength = arguments.length;\n  var index = toAbsoluteIndex(argumentsLength > 1 ? arguments[1] : undefined, length);\n  var end = argumentsLength > 2 ? arguments[2] : undefined;\n  var endPos = end === undefined ? length : toAbsoluteIndex(end, length);\n  while (endPos > index) O[index++] = value;\n  return O;\n};\n","'use strict';\nvar $forEach = require('../internals/array-iteration').forEach;\nvar arrayMethodIsStrict = require('../internals/array-method-is-strict');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar STRICT_METHOD = arrayMethodIsStrict('forEach');\nvar USES_TO_LENGTH = arrayMethodUsesToLength('forEach');\n\n// `Array.prototype.forEach` method implementation\n// https://tc39.github.io/ecma262/#sec-array.prototype.foreach\nmodule.exports = (!STRICT_METHOD || !USES_TO_LENGTH) ? function forEach(callbackfn /* , thisArg */) {\n  return $forEach(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n} : [].forEach;\n","'use strict';\nvar bind = require('../internals/function-bind-context');\nvar toObject = require('../internals/to-object');\nvar callWithSafeIterationClosing = require('../internals/call-with-safe-iteration-closing');\nvar isArrayIteratorMethod = require('../internals/is-array-iterator-method');\nvar toLength = require('../internals/to-length');\nvar createProperty = require('../internals/create-property');\nvar getIteratorMethod = require('../internals/get-iterator-method');\n\n// `Array.from` method implementation\n// https://tc39.github.io/ecma262/#sec-array.from\nmodule.exports = function from(arrayLike /* , mapfn = undefined, thisArg = undefined */) {\n  var O = toObject(arrayLike);\n  var C = typeof this == 'function' ? this : Array;\n  var argumentsLength = arguments.length;\n  var mapfn = argumentsLength > 1 ? arguments[1] : undefined;\n  var mapping = mapfn !== undefined;\n  var iteratorMethod = getIteratorMethod(O);\n  var index = 0;\n  var length, result, step, iterator, next, value;\n  if (mapping) mapfn = bind(mapfn, argumentsLength > 2 ? arguments[2] : undefined, 2);\n  // if the target is not iterable or it's an array with the default iterator - use a simple case\n  if (iteratorMethod != undefined && !(C == Array && isArrayIteratorMethod(iteratorMethod))) {\n    iterator = iteratorMethod.call(O);\n    next = iterator.next;\n    result = new C();\n    for (;!(step = next.call(iterator)).done; index++) {\n      value = mapping ? callWithSafeIterationClosing(iterator, mapfn, [step.value, index], true) : step.value;\n      createProperty(result, index, value);\n    }\n  } else {\n    length = toLength(O.length);\n    result = new C(length);\n    for (;length > index; index++) {\n      value = mapping ? mapfn(O[index], index) : O[index];\n      createProperty(result, index, value);\n    }\n  }\n  result.length = index;\n  return result;\n};\n","var toIndexedObject = require('../internals/to-indexed-object');\nvar toLength = require('../internals/to-length');\nvar toAbsoluteIndex = require('../internals/to-absolute-index');\n\n// `Array.prototype.{ indexOf, includes }` methods implementation\nvar createMethod = function (IS_INCLUDES) {\n  return function ($this, el, fromIndex) {\n    var O = toIndexedObject($this);\n    var length = toLength(O.length);\n    var index = toAbsoluteIndex(fromIndex, length);\n    var value;\n    // Array#includes uses SameValueZero equality algorithm\n    // eslint-disable-next-line no-self-compare\n    if (IS_INCLUDES && el != el) while (length > index) {\n      value = O[index++];\n      // eslint-disable-next-line no-self-compare\n      if (value != value) return true;\n    // Array#indexOf ignores holes, Array#includes - not\n    } else for (;length > index; index++) {\n      if ((IS_INCLUDES || index in O) && O[index] === el) return IS_INCLUDES || index || 0;\n    } return !IS_INCLUDES && -1;\n  };\n};\n\nmodule.exports = {\n  // `Array.prototype.includes` method\n  // https://tc39.github.io/ecma262/#sec-array.prototype.includes\n  includes: createMethod(true),\n  // `Array.prototype.indexOf` method\n  // https://tc39.github.io/ecma262/#sec-array.prototype.indexof\n  indexOf: createMethod(false)\n};\n","var bind = require('../internals/function-bind-context');\nvar IndexedObject = require('../internals/indexed-object');\nvar toObject = require('../internals/to-object');\nvar toLength = require('../internals/to-length');\nvar arraySpeciesCreate = require('../internals/array-species-create');\n\nvar push = [].push;\n\n// `Array.prototype.{ forEach, map, filter, some, every, find, findIndex }` methods implementation\nvar createMethod = function (TYPE) {\n  var IS_MAP = TYPE == 1;\n  var IS_FILTER = TYPE == 2;\n  var IS_SOME = TYPE == 3;\n  var IS_EVERY = TYPE == 4;\n  var IS_FIND_INDEX = TYPE == 6;\n  var NO_HOLES = TYPE == 5 || IS_FIND_INDEX;\n  return function ($this, callbackfn, that, specificCreate) {\n    var O = toObject($this);\n    var self = IndexedObject(O);\n    var boundFunction = bind(callbackfn, that, 3);\n    var length = toLength(self.length);\n    var index = 0;\n    var create = specificCreate || arraySpeciesCreate;\n    var target = IS_MAP ? create($this, length) : IS_FILTER ? create($this, 0) : undefined;\n    var value, result;\n    for (;length > index; index++) if (NO_HOLES || index in self) {\n      value = self[index];\n      result = boundFunction(value, index, O);\n      if (TYPE) {\n        if (IS_MAP) target[index] = result; // map\n        else if (result) switch (TYPE) {\n          case 3: return true;              // some\n          case 5: return value;             // find\n          case 6: return index;             // findIndex\n          case 2: push.call(target, value); // filter\n        } else if (IS_EVERY) return false;  // every\n      }\n    }\n    return IS_FIND_INDEX ? -1 : IS_SOME || IS_EVERY ? IS_EVERY : target;\n  };\n};\n\nmodule.exports = {\n  // `Array.prototype.forEach` method\n  // https://tc39.github.io/ecma262/#sec-array.prototype.foreach\n  forEach: createMethod(0),\n  // `Array.prototype.map` method\n  // https://tc39.github.io/ecma262/#sec-array.prototype.map\n  map: createMethod(1),\n  // `Array.prototype.filter` method\n  // https://tc39.github.io/ecma262/#sec-array.prototype.filter\n  filter: createMethod(2),\n  // `Array.prototype.some` method\n  // https://tc39.github.io/ecma262/#sec-array.prototype.some\n  some: createMethod(3),\n  // `Array.prototype.every` method\n  // https://tc39.github.io/ecma262/#sec-array.prototype.every\n  every: createMethod(4),\n  // `Array.prototype.find` method\n  // https://tc39.github.io/ecma262/#sec-array.prototype.find\n  find: createMethod(5),\n  // `Array.prototype.findIndex` method\n  // https://tc39.github.io/ecma262/#sec-array.prototype.findIndex\n  findIndex: createMethod(6)\n};\n","'use strict';\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar toInteger = require('../internals/to-integer');\nvar toLength = require('../internals/to-length');\nvar arrayMethodIsStrict = require('../internals/array-method-is-strict');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar min = Math.min;\nvar nativeLastIndexOf = [].lastIndexOf;\nvar NEGATIVE_ZERO = !!nativeLastIndexOf && 1 / [1].lastIndexOf(1, -0) < 0;\nvar STRICT_METHOD = arrayMethodIsStrict('lastIndexOf');\n// For preventing possible almost infinite loop in non-standard implementations, test the forward version of the method\nvar USES_TO_LENGTH = arrayMethodUsesToLength('indexOf', { ACCESSORS: true, 1: 0 });\nvar FORCED = NEGATIVE_ZERO || !STRICT_METHOD || !USES_TO_LENGTH;\n\n// `Array.prototype.lastIndexOf` method implementation\n// https://tc39.github.io/ecma262/#sec-array.prototype.lastindexof\nmodule.exports = FORCED ? function lastIndexOf(searchElement /* , fromIndex = @[*-1] */) {\n  // convert -0 to +0\n  if (NEGATIVE_ZERO) return nativeLastIndexOf.apply(this, arguments) || 0;\n  var O = toIndexedObject(this);\n  var length = toLength(O.length);\n  var index = length - 1;\n  if (arguments.length > 1) index = min(index, toInteger(arguments[1]));\n  if (index < 0) index = length + index;\n  for (;index >= 0; index--) if (index in O && O[index] === searchElement) return index || 0;\n  return -1;\n} : nativeLastIndexOf;\n","var fails = require('../internals/fails');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar V8_VERSION = require('../internals/engine-v8-version');\n\nvar SPECIES = wellKnownSymbol('species');\n\nmodule.exports = function (METHOD_NAME) {\n  // We can't use this feature detection in V8 since it causes\n  // deoptimization and serious performance degradation\n  // https://github.com/zloirock/core-js/issues/677\n  return V8_VERSION >= 51 || !fails(function () {\n    var array = [];\n    var constructor = array.constructor = {};\n    constructor[SPECIES] = function () {\n      return { foo: 1 };\n    };\n    return array[METHOD_NAME](Boolean).foo !== 1;\n  });\n};\n","'use strict';\nvar fails = require('../internals/fails');\n\nmodule.exports = function (METHOD_NAME, argument) {\n  var method = [][METHOD_NAME];\n  return !!method && fails(function () {\n    // eslint-disable-next-line no-useless-call,no-throw-literal\n    method.call(null, argument || function () { throw 1; }, 1);\n  });\n};\n","var DESCRIPTORS = require('../internals/descriptors');\nvar fails = require('../internals/fails');\nvar has = require('../internals/has');\n\nvar defineProperty = Object.defineProperty;\nvar cache = {};\n\nvar thrower = function (it) { throw it; };\n\nmodule.exports = function (METHOD_NAME, options) {\n  if (has(cache, METHOD_NAME)) return cache[METHOD_NAME];\n  if (!options) options = {};\n  var method = [][METHOD_NAME];\n  var ACCESSORS = has(options, 'ACCESSORS') ? options.ACCESSORS : false;\n  var argument0 = has(options, 0) ? options[0] : thrower;\n  var argument1 = has(options, 1) ? options[1] : undefined;\n\n  return cache[METHOD_NAME] = !!method && !fails(function () {\n    if (ACCESSORS && !DESCRIPTORS) return true;\n    var O = { length: -1 };\n\n    if (ACCESSORS) defineProperty(O, 1, { enumerable: true, get: thrower });\n    else O[1] = 1;\n\n    method.call(O, argument0, argument1);\n  });\n};\n","var aFunction = require('../internals/a-function');\nvar toObject = require('../internals/to-object');\nvar IndexedObject = require('../internals/indexed-object');\nvar toLength = require('../internals/to-length');\n\n// `Array.prototype.{ reduce, reduceRight }` methods implementation\nvar createMethod = function (IS_RIGHT) {\n  return function (that, callbackfn, argumentsLength, memo) {\n    aFunction(callbackfn);\n    var O = toObject(that);\n    var self = IndexedObject(O);\n    var length = toLength(O.length);\n    var index = IS_RIGHT ? length - 1 : 0;\n    var i = IS_RIGHT ? -1 : 1;\n    if (argumentsLength < 2) while (true) {\n      if (index in self) {\n        memo = self[index];\n        index += i;\n        break;\n      }\n      index += i;\n      if (IS_RIGHT ? index < 0 : length <= index) {\n        throw TypeError('Reduce of empty array with no initial value');\n      }\n    }\n    for (;IS_RIGHT ? index >= 0 : length > index; index += i) if (index in self) {\n      memo = callbackfn(memo, self[index], index, O);\n    }\n    return memo;\n  };\n};\n\nmodule.exports = {\n  // `Array.prototype.reduce` method\n  // https://tc39.github.io/ecma262/#sec-array.prototype.reduce\n  left: createMethod(false),\n  // `Array.prototype.reduceRight` method\n  // https://tc39.github.io/ecma262/#sec-array.prototype.reduceright\n  right: createMethod(true)\n};\n","var isObject = require('../internals/is-object');\nvar isArray = require('../internals/is-array');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar SPECIES = wellKnownSymbol('species');\n\n// `ArraySpeciesCreate` abstract operation\n// https://tc39.github.io/ecma262/#sec-arrayspeciescreate\nmodule.exports = function (originalArray, length) {\n  var C;\n  if (isArray(originalArray)) {\n    C = originalArray.constructor;\n    // cross-realm fallback\n    if (typeof C == 'function' && (C === Array || isArray(C.prototype))) C = undefined;\n    else if (isObject(C)) {\n      C = C[SPECIES];\n      if (C === null) C = undefined;\n    }\n  } return new (C === undefined ? Array : C)(length === 0 ? 0 : length);\n};\n","var anObject = require('../internals/an-object');\n\n// call something on iterator step with safe closing on error\nmodule.exports = function (iterator, fn, value, ENTRIES) {\n  try {\n    return ENTRIES ? fn(anObject(value)[0], value[1]) : fn(value);\n  // 7.4.6 IteratorClose(iterator, completion)\n  } catch (error) {\n    var returnMethod = iterator['return'];\n    if (returnMethod !== undefined) anObject(returnMethod.call(iterator));\n    throw error;\n  }\n};\n","var wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar ITERATOR = wellKnownSymbol('iterator');\nvar SAFE_CLOSING = false;\n\ntry {\n  var called = 0;\n  var iteratorWithReturn = {\n    next: function () {\n      return { done: !!called++ };\n    },\n    'return': function () {\n      SAFE_CLOSING = true;\n    }\n  };\n  iteratorWithReturn[ITERATOR] = function () {\n    return this;\n  };\n  // eslint-disable-next-line no-throw-literal\n  Array.from(iteratorWithReturn, function () { throw 2; });\n} catch (error) { /* empty */ }\n\nmodule.exports = function (exec, SKIP_CLOSING) {\n  if (!SKIP_CLOSING && !SAFE_CLOSING) return false;\n  var ITERATION_SUPPORT = false;\n  try {\n    var object = {};\n    object[ITERATOR] = function () {\n      return {\n        next: function () {\n          return { done: ITERATION_SUPPORT = true };\n        }\n      };\n    };\n    exec(object);\n  } catch (error) { /* empty */ }\n  return ITERATION_SUPPORT;\n};\n","var toString = {}.toString;\n\nmodule.exports = function (it) {\n  return toString.call(it).slice(8, -1);\n};\n","var TO_STRING_TAG_SUPPORT = require('../internals/to-string-tag-support');\nvar classofRaw = require('../internals/classof-raw');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar TO_STRING_TAG = wellKnownSymbol('toStringTag');\n// ES3 wrong here\nvar CORRECT_ARGUMENTS = classofRaw(function () { return arguments; }()) == 'Arguments';\n\n// fallback for IE11 Script Access Denied error\nvar tryGet = function (it, key) {\n  try {\n    return it[key];\n  } catch (error) { /* empty */ }\n};\n\n// getting tag from ES6+ `Object.prototype.toString`\nmodule.exports = TO_STRING_TAG_SUPPORT ? classofRaw : function (it) {\n  var O, tag, result;\n  return it === undefined ? 'Undefined' : it === null ? 'Null'\n    // @@toStringTag case\n    : typeof (tag = tryGet(O = Object(it), TO_STRING_TAG)) == 'string' ? tag\n    // builtinTag case\n    : CORRECT_ARGUMENTS ? classofRaw(O)\n    // ES3 arguments fallback\n    : (result = classofRaw(O)) == 'Object' && typeof O.callee == 'function' ? 'Arguments' : result;\n};\n","'use strict';\nvar anObject = require('../internals/an-object');\nvar aFunction = require('../internals/a-function');\n\n// https://github.com/tc39/collection-methods\nmodule.exports = function (/* ...elements */) {\n  var set = anObject(this);\n  var adder = aFunction(set.add);\n  for (var k = 0, len = arguments.length; k < len; k++) {\n    adder.call(set, arguments[k]);\n  }\n  return set;\n};\n","'use strict';\nvar anObject = require('../internals/an-object');\nvar aFunction = require('../internals/a-function');\n\n// https://github.com/tc39/collection-methods\nmodule.exports = function (/* ...elements */) {\n  var collection = anObject(this);\n  var remover = aFunction(collection['delete']);\n  var allDeleted = true;\n  var wasDeleted;\n  for (var k = 0, len = arguments.length; k < len; k++) {\n    wasDeleted = remover.call(collection, arguments[k]);\n    allDeleted = allDeleted && wasDeleted;\n  }\n  return !!allDeleted;\n};\n","'use strict';\n// https://tc39.github.io/proposal-setmap-offrom/\nvar aFunction = require('../internals/a-function');\nvar bind = require('../internals/function-bind-context');\nvar iterate = require('../internals/iterate');\n\nmodule.exports = function from(source /* , mapFn, thisArg */) {\n  var length = arguments.length;\n  var mapFn = length > 1 ? arguments[1] : undefined;\n  var mapping, A, n, boundFunction;\n  aFunction(this);\n  mapping = mapFn !== undefined;\n  if (mapping) aFunction(mapFn);\n  if (source == undefined) return new this();\n  A = [];\n  if (mapping) {\n    n = 0;\n    boundFunction = bind(mapFn, length > 2 ? arguments[2] : undefined, 2);\n    iterate(source, function (nextItem) {\n      A.push(boundFunction(nextItem, n++));\n    });\n  } else {\n    iterate(source, A.push, A);\n  }\n  return new this(A);\n};\n","'use strict';\n// https://tc39.github.io/proposal-setmap-offrom/\nmodule.exports = function of() {\n  var length = arguments.length;\n  var A = new Array(length);\n  while (length--) A[length] = arguments[length];\n  return new this(A);\n};\n","'use strict';\nvar defineProperty = require('../internals/object-define-property').f;\nvar create = require('../internals/object-create');\nvar redefineAll = require('../internals/redefine-all');\nvar bind = require('../internals/function-bind-context');\nvar anInstance = require('../internals/an-instance');\nvar iterate = require('../internals/iterate');\nvar defineIterator = require('../internals/define-iterator');\nvar setSpecies = require('../internals/set-species');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar fastKey = require('../internals/internal-metadata').fastKey;\nvar InternalStateModule = require('../internals/internal-state');\n\nvar setInternalState = InternalStateModule.set;\nvar internalStateGetterFor = InternalStateModule.getterFor;\n\nmodule.exports = {\n  getConstructor: function (wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER) {\n    var C = wrapper(function (that, iterable) {\n      anInstance(that, C, CONSTRUCTOR_NAME);\n      setInternalState(that, {\n        type: CONSTRUCTOR_NAME,\n        index: create(null),\n        first: undefined,\n        last: undefined,\n        size: 0\n      });\n      if (!DESCRIPTORS) that.size = 0;\n      if (iterable != undefined) iterate(iterable, that[ADDER], that, IS_MAP);\n    });\n\n    var getInternalState = internalStateGetterFor(CONSTRUCTOR_NAME);\n\n    var define = function (that, key, value) {\n      var state = getInternalState(that);\n      var entry = getEntry(that, key);\n      var previous, index;\n      // change existing entry\n      if (entry) {\n        entry.value = value;\n      // create new entry\n      } else {\n        state.last = entry = {\n          index: index = fastKey(key, true),\n          key: key,\n          value: value,\n          previous: previous = state.last,\n          next: undefined,\n          removed: false\n        };\n        if (!state.first) state.first = entry;\n        if (previous) previous.next = entry;\n        if (DESCRIPTORS) state.size++;\n        else that.size++;\n        // add to index\n        if (index !== 'F') state.index[index] = entry;\n      } return that;\n    };\n\n    var getEntry = function (that, key) {\n      var state = getInternalState(that);\n      // fast case\n      var index = fastKey(key);\n      var entry;\n      if (index !== 'F') return state.index[index];\n      // frozen object case\n      for (entry = state.first; entry; entry = entry.next) {\n        if (entry.key == key) return entry;\n      }\n    };\n\n    redefineAll(C.prototype, {\n      // 23.1.3.1 Map.prototype.clear()\n      // 23.2.3.2 Set.prototype.clear()\n      clear: function clear() {\n        var that = this;\n        var state = getInternalState(that);\n        var data = state.index;\n        var entry = state.first;\n        while (entry) {\n          entry.removed = true;\n          if (entry.previous) entry.previous = entry.previous.next = undefined;\n          delete data[entry.index];\n          entry = entry.next;\n        }\n        state.first = state.last = undefined;\n        if (DESCRIPTORS) state.size = 0;\n        else that.size = 0;\n      },\n      // 23.1.3.3 Map.prototype.delete(key)\n      // 23.2.3.4 Set.prototype.delete(value)\n      'delete': function (key) {\n        var that = this;\n        var state = getInternalState(that);\n        var entry = getEntry(that, key);\n        if (entry) {\n          var next = entry.next;\n          var prev = entry.previous;\n          delete state.index[entry.index];\n          entry.removed = true;\n          if (prev) prev.next = next;\n          if (next) next.previous = prev;\n          if (state.first == entry) state.first = next;\n          if (state.last == entry) state.last = prev;\n          if (DESCRIPTORS) state.size--;\n          else that.size--;\n        } return !!entry;\n      },\n      // 23.2.3.6 Set.prototype.forEach(callbackfn, thisArg = undefined)\n      // 23.1.3.5 Map.prototype.forEach(callbackfn, thisArg = undefined)\n      forEach: function forEach(callbackfn /* , that = undefined */) {\n        var state = getInternalState(this);\n        var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);\n        var entry;\n        while (entry = entry ? entry.next : state.first) {\n          boundFunction(entry.value, entry.key, this);\n          // revert to the last existing entry\n          while (entry && entry.removed) entry = entry.previous;\n        }\n      },\n      // 23.1.3.7 Map.prototype.has(key)\n      // 23.2.3.7 Set.prototype.has(value)\n      has: function has(key) {\n        return !!getEntry(this, key);\n      }\n    });\n\n    redefineAll(C.prototype, IS_MAP ? {\n      // 23.1.3.6 Map.prototype.get(key)\n      get: function get(key) {\n        var entry = getEntry(this, key);\n        return entry && entry.value;\n      },\n      // 23.1.3.9 Map.prototype.set(key, value)\n      set: function set(key, value) {\n        return define(this, key === 0 ? 0 : key, value);\n      }\n    } : {\n      // 23.2.3.1 Set.prototype.add(value)\n      add: function add(value) {\n        return define(this, value = value === 0 ? 0 : value, value);\n      }\n    });\n    if (DESCRIPTORS) defineProperty(C.prototype, 'size', {\n      get: function () {\n        return getInternalState(this).size;\n      }\n    });\n    return C;\n  },\n  setStrong: function (C, CONSTRUCTOR_NAME, IS_MAP) {\n    var ITERATOR_NAME = CONSTRUCTOR_NAME + ' Iterator';\n    var getInternalCollectionState = internalStateGetterFor(CONSTRUCTOR_NAME);\n    var getInternalIteratorState = internalStateGetterFor(ITERATOR_NAME);\n    // add .keys, .values, .entries, [@@iterator]\n    // 23.1.3.4, 23.1.3.8, 23.1.3.11, 23.1.3.12, 23.2.3.5, 23.2.3.8, 23.2.3.10, 23.2.3.11\n    defineIterator(C, CONSTRUCTOR_NAME, function (iterated, kind) {\n      setInternalState(this, {\n        type: ITERATOR_NAME,\n        target: iterated,\n        state: getInternalCollectionState(iterated),\n        kind: kind,\n        last: undefined\n      });\n    }, function () {\n      var state = getInternalIteratorState(this);\n      var kind = state.kind;\n      var entry = state.last;\n      // revert to the last existing entry\n      while (entry && entry.removed) entry = entry.previous;\n      // get next entry\n      if (!state.target || !(state.last = entry = entry ? entry.next : state.state.first)) {\n        // or finish the iteration\n        state.target = undefined;\n        return { value: undefined, done: true };\n      }\n      // return step by kind\n      if (kind == 'keys') return { value: entry.key, done: false };\n      if (kind == 'values') return { value: entry.value, done: false };\n      return { value: [entry.key, entry.value], done: false };\n    }, IS_MAP ? 'entries' : 'values', !IS_MAP, true);\n\n    // add [@@species], 23.1.2.2, 23.2.2.2\n    setSpecies(CONSTRUCTOR_NAME);\n  }\n};\n","'use strict';\nvar redefineAll = require('../internals/redefine-all');\nvar getWeakData = require('../internals/internal-metadata').getWeakData;\nvar anObject = require('../internals/an-object');\nvar isObject = require('../internals/is-object');\nvar anInstance = require('../internals/an-instance');\nvar iterate = require('../internals/iterate');\nvar ArrayIterationModule = require('../internals/array-iteration');\nvar $has = require('../internals/has');\nvar InternalStateModule = require('../internals/internal-state');\n\nvar setInternalState = InternalStateModule.set;\nvar internalStateGetterFor = InternalStateModule.getterFor;\nvar find = ArrayIterationModule.find;\nvar findIndex = ArrayIterationModule.findIndex;\nvar id = 0;\n\n// fallback for uncaught frozen keys\nvar uncaughtFrozenStore = function (store) {\n  return store.frozen || (store.frozen = new UncaughtFrozenStore());\n};\n\nvar UncaughtFrozenStore = function () {\n  this.entries = [];\n};\n\nvar findUncaughtFrozen = function (store, key) {\n  return find(store.entries, function (it) {\n    return it[0] === key;\n  });\n};\n\nUncaughtFrozenStore.prototype = {\n  get: function (key) {\n    var entry = findUncaughtFrozen(this, key);\n    if (entry) return entry[1];\n  },\n  has: function (key) {\n    return !!findUncaughtFrozen(this, key);\n  },\n  set: function (key, value) {\n    var entry = findUncaughtFrozen(this, key);\n    if (entry) entry[1] = value;\n    else this.entries.push([key, value]);\n  },\n  'delete': function (key) {\n    var index = findIndex(this.entries, function (it) {\n      return it[0] === key;\n    });\n    if (~index) this.entries.splice(index, 1);\n    return !!~index;\n  }\n};\n\nmodule.exports = {\n  getConstructor: function (wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER) {\n    var C = wrapper(function (that, iterable) {\n      anInstance(that, C, CONSTRUCTOR_NAME);\n      setInternalState(that, {\n        type: CONSTRUCTOR_NAME,\n        id: id++,\n        frozen: undefined\n      });\n      if (iterable != undefined) iterate(iterable, that[ADDER], that, IS_MAP);\n    });\n\n    var getInternalState = internalStateGetterFor(CONSTRUCTOR_NAME);\n\n    var define = function (that, key, value) {\n      var state = getInternalState(that);\n      var data = getWeakData(anObject(key), true);\n      if (data === true) uncaughtFrozenStore(state).set(key, value);\n      else data[state.id] = value;\n      return that;\n    };\n\n    redefineAll(C.prototype, {\n      // 23.3.3.2 WeakMap.prototype.delete(key)\n      // 23.4.3.3 WeakSet.prototype.delete(value)\n      'delete': function (key) {\n        var state = getInternalState(this);\n        if (!isObject(key)) return false;\n        var data = getWeakData(key);\n        if (data === true) return uncaughtFrozenStore(state)['delete'](key);\n        return data && $has(data, state.id) && delete data[state.id];\n      },\n      // 23.3.3.4 WeakMap.prototype.has(key)\n      // 23.4.3.4 WeakSet.prototype.has(value)\n      has: function has(key) {\n        var state = getInternalState(this);\n        if (!isObject(key)) return false;\n        var data = getWeakData(key);\n        if (data === true) return uncaughtFrozenStore(state).has(key);\n        return data && $has(data, state.id);\n      }\n    });\n\n    redefineAll(C.prototype, IS_MAP ? {\n      // 23.3.3.3 WeakMap.prototype.get(key)\n      get: function get(key) {\n        var state = getInternalState(this);\n        if (isObject(key)) {\n          var data = getWeakData(key);\n          if (data === true) return uncaughtFrozenStore(state).get(key);\n          return data ? data[state.id] : undefined;\n        }\n      },\n      // 23.3.3.5 WeakMap.prototype.set(key, value)\n      set: function set(key, value) {\n        return define(this, key, value);\n      }\n    } : {\n      // 23.4.3.1 WeakSet.prototype.add(value)\n      add: function add(value) {\n        return define(this, value, true);\n      }\n    });\n\n    return C;\n  }\n};\n","'use strict';\nvar $ = require('../internals/export');\nvar global = require('../internals/global');\nvar isForced = require('../internals/is-forced');\nvar redefine = require('../internals/redefine');\nvar InternalMetadataModule = require('../internals/internal-metadata');\nvar iterate = require('../internals/iterate');\nvar anInstance = require('../internals/an-instance');\nvar isObject = require('../internals/is-object');\nvar fails = require('../internals/fails');\nvar checkCorrectnessOfIteration = require('../internals/check-correctness-of-iteration');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar inheritIfRequired = require('../internals/inherit-if-required');\n\nmodule.exports = function (CONSTRUCTOR_NAME, wrapper, common) {\n  var IS_MAP = CONSTRUCTOR_NAME.indexOf('Map') !== -1;\n  var IS_WEAK = CONSTRUCTOR_NAME.indexOf('Weak') !== -1;\n  var ADDER = IS_MAP ? 'set' : 'add';\n  var NativeConstructor = global[CONSTRUCTOR_NAME];\n  var NativePrototype = NativeConstructor && NativeConstructor.prototype;\n  var Constructor = NativeConstructor;\n  var exported = {};\n\n  var fixMethod = function (KEY) {\n    var nativeMethod = NativePrototype[KEY];\n    redefine(NativePrototype, KEY,\n      KEY == 'add' ? function add(value) {\n        nativeMethod.call(this, value === 0 ? 0 : value);\n        return this;\n      } : KEY == 'delete' ? function (key) {\n        return IS_WEAK && !isObject(key) ? false : nativeMethod.call(this, key === 0 ? 0 : key);\n      } : KEY == 'get' ? function get(key) {\n        return IS_WEAK && !isObject(key) ? undefined : nativeMethod.call(this, key === 0 ? 0 : key);\n      } : KEY == 'has' ? function has(key) {\n        return IS_WEAK && !isObject(key) ? false : nativeMethod.call(this, key === 0 ? 0 : key);\n      } : function set(key, value) {\n        nativeMethod.call(this, key === 0 ? 0 : key, value);\n        return this;\n      }\n    );\n  };\n\n  // eslint-disable-next-line max-len\n  if (isForced(CONSTRUCTOR_NAME, typeof NativeConstructor != 'function' || !(IS_WEAK || NativePrototype.forEach && !fails(function () {\n    new NativeConstructor().entries().next();\n  })))) {\n    // create collection constructor\n    Constructor = common.getConstructor(wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER);\n    InternalMetadataModule.REQUIRED = true;\n  } else if (isForced(CONSTRUCTOR_NAME, true)) {\n    var instance = new Constructor();\n    // early implementations not supports chaining\n    var HASNT_CHAINING = instance[ADDER](IS_WEAK ? {} : -0, 1) != instance;\n    // V8 ~ Chromium 40- weak-collections throws on primitives, but should return false\n    var THROWS_ON_PRIMITIVES = fails(function () { instance.has(1); });\n    // most early implementations doesn't supports iterables, most modern - not close it correctly\n    // eslint-disable-next-line no-new\n    var ACCEPT_ITERABLES = checkCorrectnessOfIteration(function (iterable) { new NativeConstructor(iterable); });\n    // for early implementations -0 and +0 not the same\n    var BUGGY_ZERO = !IS_WEAK && fails(function () {\n      // V8 ~ Chromium 42- fails only with 5+ elements\n      var $instance = new NativeConstructor();\n      var index = 5;\n      while (index--) $instance[ADDER](index, index);\n      return !$instance.has(-0);\n    });\n\n    if (!ACCEPT_ITERABLES) {\n      Constructor = wrapper(function (dummy, iterable) {\n        anInstance(dummy, Constructor, CONSTRUCTOR_NAME);\n        var that = inheritIfRequired(new NativeConstructor(), dummy, Constructor);\n        if (iterable != undefined) iterate(iterable, that[ADDER], that, IS_MAP);\n        return that;\n      });\n      Constructor.prototype = NativePrototype;\n      NativePrototype.constructor = Constructor;\n    }\n\n    if (THROWS_ON_PRIMITIVES || BUGGY_ZERO) {\n      fixMethod('delete');\n      fixMethod('has');\n      IS_MAP && fixMethod('get');\n    }\n\n    if (BUGGY_ZERO || HASNT_CHAINING) fixMethod(ADDER);\n\n    // weak collections should not contains .clear method\n    if (IS_WEAK && NativePrototype.clear) delete NativePrototype.clear;\n  }\n\n  exported[CONSTRUCTOR_NAME] = Constructor;\n  $({ global: true, forced: Constructor != NativeConstructor }, exported);\n\n  setToStringTag(Constructor, CONSTRUCTOR_NAME);\n\n  if (!IS_WEAK) common.setStrong(Constructor, CONSTRUCTOR_NAME, IS_MAP);\n\n  return Constructor;\n};\n","// TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`\nvar Map = require('../modules/es.map');\nvar WeakMap = require('../modules/es.weak-map');\nvar create = require('../internals/object-create');\nvar isObject = require('../internals/is-object');\n\nvar Node = function () {\n  // keys\n  this.object = null;\n  this.symbol = null;\n  // child nodes\n  this.primitives = null;\n  this.objectsByIndex = create(null);\n};\n\nNode.prototype.get = function (key, initializer) {\n  return this[key] || (this[key] = initializer());\n};\n\nNode.prototype.next = function (i, it, IS_OBJECT) {\n  var store = IS_OBJECT\n    ? this.objectsByIndex[i] || (this.objectsByIndex[i] = new WeakMap())\n    : this.primitives || (this.primitives = new Map());\n  var entry = store.get(it);\n  if (!entry) store.set(it, entry = new Node());\n  return entry;\n};\n\nvar root = new Node();\n\nmodule.exports = function () {\n  var active = root;\n  var length = arguments.length;\n  var i, it;\n  // for prevent leaking, start from objects\n  for (i = 0; i < length; i++) {\n    if (isObject(it = arguments[i])) active = active.next(i, it, true);\n  }\n  if (this === Object && active === root) throw TypeError('Composite keys must contain a non-primitive component');\n  for (i = 0; i < length; i++) {\n    if (!isObject(it = arguments[i])) active = active.next(i, it, false);\n  } return active;\n};\n","var has = require('../internals/has');\nvar ownKeys = require('../internals/own-keys');\nvar getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');\nvar definePropertyModule = require('../internals/object-define-property');\n\nmodule.exports = function (target, source) {\n  var keys = ownKeys(source);\n  var defineProperty = definePropertyModule.f;\n  var getOwnPropertyDescriptor = getOwnPropertyDescriptorModule.f;\n  for (var i = 0; i < keys.length; i++) {\n    var key = keys[i];\n    if (!has(target, key)) defineProperty(target, key, getOwnPropertyDescriptor(source, key));\n  }\n};\n","var wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar MATCH = wellKnownSymbol('match');\n\nmodule.exports = function (METHOD_NAME) {\n  var regexp = /./;\n  try {\n    '/./'[METHOD_NAME](regexp);\n  } catch (e) {\n    try {\n      regexp[MATCH] = false;\n      return '/./'[METHOD_NAME](regexp);\n    } catch (f) { /* empty */ }\n  } return false;\n};\n","var fails = require('../internals/fails');\n\nmodule.exports = !fails(function () {\n  function F() { /* empty */ }\n  F.prototype.constructor = null;\n  return Object.getPrototypeOf(new F()) !== F.prototype;\n});\n","var requireObjectCoercible = require('../internals/require-object-coercible');\n\nvar quot = /\"/g;\n\n// B.2.3.2.1 CreateHTML(string, tag, attribute, value)\n// https://tc39.github.io/ecma262/#sec-createhtml\nmodule.exports = function (string, tag, attribute, value) {\n  var S = String(requireObjectCoercible(string));\n  var p1 = '<' + tag;\n  if (attribute !== '') p1 += ' ' + attribute + '=\"' + String(value).replace(quot, '&quot;') + '\"';\n  return p1 + '>' + S + '</' + tag + '>';\n};\n","'use strict';\nvar IteratorPrototype = require('../internals/iterators-core').IteratorPrototype;\nvar create = require('../internals/object-create');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar Iterators = require('../internals/iterators');\n\nvar returnThis = function () { return this; };\n\nmodule.exports = function (IteratorConstructor, NAME, next) {\n  var TO_STRING_TAG = NAME + ' Iterator';\n  IteratorConstructor.prototype = create(IteratorPrototype, { next: createPropertyDescriptor(1, next) });\n  setToStringTag(IteratorConstructor, TO_STRING_TAG, false, true);\n  Iterators[TO_STRING_TAG] = returnThis;\n  return IteratorConstructor;\n};\n","var DESCRIPTORS = require('../internals/descriptors');\nvar definePropertyModule = require('../internals/object-define-property');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\n\nmodule.exports = DESCRIPTORS ? function (object, key, value) {\n  return definePropertyModule.f(object, key, createPropertyDescriptor(1, value));\n} : function (object, key, value) {\n  object[key] = value;\n  return object;\n};\n","module.exports = function (bitmap, value) {\n  return {\n    enumerable: !(bitmap & 1),\n    configurable: !(bitmap & 2),\n    writable: !(bitmap & 4),\n    value: value\n  };\n};\n","'use strict';\nvar toPrimitive = require('../internals/to-primitive');\nvar definePropertyModule = require('../internals/object-define-property');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\n\nmodule.exports = function (object, key, value) {\n  var propertyKey = toPrimitive(key);\n  if (propertyKey in object) definePropertyModule.f(object, propertyKey, createPropertyDescriptor(0, value));\n  else object[propertyKey] = value;\n};\n","'use strict';\nvar anObject = require('../internals/an-object');\nvar toPrimitive = require('../internals/to-primitive');\n\nmodule.exports = function (hint) {\n  if (hint !== 'string' && hint !== 'number' && hint !== 'default') {\n    throw TypeError('Incorrect hint');\n  } return toPrimitive(anObject(this), hint !== 'number');\n};\n","'use strict';\nvar $ = require('../internals/export');\nvar createIteratorConstructor = require('../internals/create-iterator-constructor');\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\nvar setPrototypeOf = require('../internals/object-set-prototype-of');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar redefine = require('../internals/redefine');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar IS_PURE = require('../internals/is-pure');\nvar Iterators = require('../internals/iterators');\nvar IteratorsCore = require('../internals/iterators-core');\n\nvar IteratorPrototype = IteratorsCore.IteratorPrototype;\nvar BUGGY_SAFARI_ITERATORS = IteratorsCore.BUGGY_SAFARI_ITERATORS;\nvar ITERATOR = wellKnownSymbol('iterator');\nvar KEYS = 'keys';\nvar VALUES = 'values';\nvar ENTRIES = 'entries';\n\nvar returnThis = function () { return this; };\n\nmodule.exports = function (Iterable, NAME, IteratorConstructor, next, DEFAULT, IS_SET, FORCED) {\n  createIteratorConstructor(IteratorConstructor, NAME, next);\n\n  var getIterationMethod = function (KIND) {\n    if (KIND === DEFAULT && defaultIterator) return defaultIterator;\n    if (!BUGGY_SAFARI_ITERATORS && KIND in IterablePrototype) return IterablePrototype[KIND];\n    switch (KIND) {\n      case KEYS: return function keys() { return new IteratorConstructor(this, KIND); };\n      case VALUES: return function values() { return new IteratorConstructor(this, KIND); };\n      case ENTRIES: return function entries() { return new IteratorConstructor(this, KIND); };\n    } return function () { return new IteratorConstructor(this); };\n  };\n\n  var TO_STRING_TAG = NAME + ' Iterator';\n  var INCORRECT_VALUES_NAME = false;\n  var IterablePrototype = Iterable.prototype;\n  var nativeIterator = IterablePrototype[ITERATOR]\n    || IterablePrototype['@@iterator']\n    || DEFAULT && IterablePrototype[DEFAULT];\n  var defaultIterator = !BUGGY_SAFARI_ITERATORS && nativeIterator || getIterationMethod(DEFAULT);\n  var anyNativeIterator = NAME == 'Array' ? IterablePrototype.entries || nativeIterator : nativeIterator;\n  var CurrentIteratorPrototype, methods, KEY;\n\n  // fix native\n  if (anyNativeIterator) {\n    CurrentIteratorPrototype = getPrototypeOf(anyNativeIterator.call(new Iterable()));\n    if (IteratorPrototype !== Object.prototype && CurrentIteratorPrototype.next) {\n      if (!IS_PURE && getPrototypeOf(CurrentIteratorPrototype) !== IteratorPrototype) {\n        if (setPrototypeOf) {\n          setPrototypeOf(CurrentIteratorPrototype, IteratorPrototype);\n        } else if (typeof CurrentIteratorPrototype[ITERATOR] != 'function') {\n          createNonEnumerableProperty(CurrentIteratorPrototype, ITERATOR, returnThis);\n        }\n      }\n      // Set @@toStringTag to native iterators\n      setToStringTag(CurrentIteratorPrototype, TO_STRING_TAG, true, true);\n      if (IS_PURE) Iterators[TO_STRING_TAG] = returnThis;\n    }\n  }\n\n  // fix Array#{values, @@iterator}.name in V8 / FF\n  if (DEFAULT == VALUES && nativeIterator && nativeIterator.name !== VALUES) {\n    INCORRECT_VALUES_NAME = true;\n    defaultIterator = function values() { return nativeIterator.call(this); };\n  }\n\n  // define iterator\n  if ((!IS_PURE || FORCED) && IterablePrototype[ITERATOR] !== defaultIterator) {\n    createNonEnumerableProperty(IterablePrototype, ITERATOR, defaultIterator);\n  }\n  Iterators[NAME] = defaultIterator;\n\n  // export additional methods\n  if (DEFAULT) {\n    methods = {\n      values: getIterationMethod(VALUES),\n      keys: IS_SET ? defaultIterator : getIterationMethod(KEYS),\n      entries: getIterationMethod(ENTRIES)\n    };\n    if (FORCED) for (KEY in methods) {\n      if (BUGGY_SAFARI_ITERATORS || INCORRECT_VALUES_NAME || !(KEY in IterablePrototype)) {\n        redefine(IterablePrototype, KEY, methods[KEY]);\n      }\n    } else $({ target: NAME, proto: true, forced: BUGGY_SAFARI_ITERATORS || INCORRECT_VALUES_NAME }, methods);\n  }\n\n  return methods;\n};\n","var path = require('../internals/path');\nvar has = require('../internals/has');\nvar wrappedWellKnownSymbolModule = require('../internals/well-known-symbol-wrapped');\nvar defineProperty = require('../internals/object-define-property').f;\n\nmodule.exports = function (NAME) {\n  var Symbol = path.Symbol || (path.Symbol = {});\n  if (!has(Symbol, NAME)) defineProperty(Symbol, NAME, {\n    value: wrappedWellKnownSymbolModule.f(NAME)\n  });\n};\n","var fails = require('../internals/fails');\n\n// Thank's IE8 for his funny defineProperty\nmodule.exports = !fails(function () {\n  return Object.defineProperty({}, 1, { get: function () { return 7; } })[1] != 7;\n});\n","var global = require('../internals/global');\nvar isObject = require('../internals/is-object');\n\nvar document = global.document;\n// typeof document.createElement is 'object' in old IE\nvar EXISTS = isObject(document) && isObject(document.createElement);\n\nmodule.exports = function (it) {\n  return EXISTS ? document.createElement(it) : {};\n};\n","// iterable DOM collections\n// flag - `iterable` interface - 'entries', 'keys', 'values', 'forEach' methods\nmodule.exports = {\n  CSSRuleList: 0,\n  CSSStyleDeclaration: 0,\n  CSSValueList: 0,\n  ClientRectList: 0,\n  DOMRectList: 0,\n  DOMStringList: 0,\n  DOMTokenList: 1,\n  DataTransferItemList: 0,\n  FileList: 0,\n  HTMLAllCollection: 0,\n  HTMLCollection: 0,\n  HTMLFormElement: 0,\n  HTMLSelectElement: 0,\n  MediaList: 0,\n  MimeTypeArray: 0,\n  NamedNodeMap: 0,\n  NodeList: 1,\n  PaintRequestList: 0,\n  Plugin: 0,\n  PluginArray: 0,\n  SVGLengthList: 0,\n  SVGNumberList: 0,\n  SVGPathSegList: 0,\n  SVGPointList: 0,\n  SVGStringList: 0,\n  SVGTransformList: 0,\n  SourceBufferList: 0,\n  StyleSheetList: 0,\n  TextTrackCueList: 0,\n  TextTrackList: 0,\n  TouchList: 0\n};\n","var userAgent = require('../internals/engine-user-agent');\n\nmodule.exports = /(iphone|ipod|ipad).*applewebkit/i.test(userAgent);\n","var getBuiltIn = require('../internals/get-built-in');\n\nmodule.exports = getBuiltIn('navigator', 'userAgent') || '';\n","var global = require('../internals/global');\nvar userAgent = require('../internals/engine-user-agent');\n\nvar process = global.process;\nvar versions = process && process.versions;\nvar v8 = versions && versions.v8;\nvar match, version;\n\nif (v8) {\n  match = v8.split('.');\n  version = match[0] + match[1];\n} else if (userAgent) {\n  match = userAgent.match(/Edge\\/(\\d+)/);\n  if (!match || match[1] >= 74) {\n    match = userAgent.match(/Chrome\\/(\\d+)/);\n    if (match) version = match[1];\n  }\n}\n\nmodule.exports = version && +version;\n","// IE8- don't enum bug keys\nmodule.exports = [\n  'constructor',\n  'hasOwnProperty',\n  'isPrototypeOf',\n  'propertyIsEnumerable',\n  'toLocaleString',\n  'toString',\n  'valueOf'\n];\n","var global = require('../internals/global');\nvar getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar redefine = require('../internals/redefine');\nvar setGlobal = require('../internals/set-global');\nvar copyConstructorProperties = require('../internals/copy-constructor-properties');\nvar isForced = require('../internals/is-forced');\n\n/*\n  options.target      - name of the target object\n  options.global      - target is the global object\n  options.stat        - export as static methods of target\n  options.proto       - export as prototype methods of target\n  options.real        - real prototype method for the `pure` version\n  options.forced      - export even if the native feature is available\n  options.bind        - bind methods to the target, required for the `pure` version\n  options.wrap        - wrap constructors to preventing global pollution, required for the `pure` version\n  options.unsafe      - use the simple assignment of property instead of delete + defineProperty\n  options.sham        - add a flag to not completely full polyfills\n  options.enumerable  - export as enumerable property\n  options.noTargetGet - prevent calling a getter on target\n*/\nmodule.exports = function (options, source) {\n  var TARGET = options.target;\n  var GLOBAL = options.global;\n  var STATIC = options.stat;\n  var FORCED, target, key, targetProperty, sourceProperty, descriptor;\n  if (GLOBAL) {\n    target = global;\n  } else if (STATIC) {\n    target = global[TARGET] || setGlobal(TARGET, {});\n  } else {\n    target = (global[TARGET] || {}).prototype;\n  }\n  if (target) for (key in source) {\n    sourceProperty = source[key];\n    if (options.noTargetGet) {\n      descriptor = getOwnPropertyDescriptor(target, key);\n      targetProperty = descriptor && descriptor.value;\n    } else targetProperty = target[key];\n    FORCED = isForced(GLOBAL ? key : TARGET + (STATIC ? '.' : '#') + key, options.forced);\n    // contained in target\n    if (!FORCED && targetProperty !== undefined) {\n      if (typeof sourceProperty === typeof targetProperty) continue;\n      copyConstructorProperties(sourceProperty, targetProperty);\n    }\n    // add a flag to not completely full polyfills\n    if (options.sham || (targetProperty && targetProperty.sham)) {\n      createNonEnumerableProperty(sourceProperty, 'sham', true);\n    }\n    // extend global\n    redefine(target, key, sourceProperty, options);\n  }\n};\n","module.exports = function (exec) {\n  try {\n    return !!exec();\n  } catch (error) {\n    return true;\n  }\n};\n","'use strict';\n// TODO: Remove from `core-js@4` since it's moved to entry points\nrequire('../modules/es.regexp.exec');\nvar redefine = require('../internals/redefine');\nvar fails = require('../internals/fails');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar regexpExec = require('../internals/regexp-exec');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\n\nvar SPECIES = wellKnownSymbol('species');\n\nvar REPLACE_SUPPORTS_NAMED_GROUPS = !fails(function () {\n  // #replace needs built-in support for named groups.\n  // #match works fine because it just return the exec results, even if it has\n  // a \"grops\" property.\n  var re = /./;\n  re.exec = function () {\n    var result = [];\n    result.groups = { a: '7' };\n    return result;\n  };\n  return ''.replace(re, '$<a>') !== '7';\n});\n\n// IE <= 11 replaces $0 with the whole match, as if it was $&\n// https://stackoverflow.com/questions/6024666/getting-ie-to-replace-a-regex-with-the-literal-string-0\nvar REPLACE_KEEPS_$0 = (function () {\n  return 'a'.replace(/./, '$0') === '$0';\n})();\n\nvar REPLACE = wellKnownSymbol('replace');\n// Safari <= 13.0.3(?) substitutes nth capture where n>m with an empty string\nvar REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE = (function () {\n  if (/./[REPLACE]) {\n    return /./[REPLACE]('a', '$0') === '';\n  }\n  return false;\n})();\n\n// Chrome 51 has a buggy \"split\" implementation when RegExp#exec !== nativeExec\n// Weex JS has frozen built-in prototypes, so use try / catch wrapper\nvar SPLIT_WORKS_WITH_OVERWRITTEN_EXEC = !fails(function () {\n  var re = /(?:)/;\n  var originalExec = re.exec;\n  re.exec = function () { return originalExec.apply(this, arguments); };\n  var result = 'ab'.split(re);\n  return result.length !== 2 || result[0] !== 'a' || result[1] !== 'b';\n});\n\nmodule.exports = function (KEY, length, exec, sham) {\n  var SYMBOL = wellKnownSymbol(KEY);\n\n  var DELEGATES_TO_SYMBOL = !fails(function () {\n    // String methods call symbol-named RegEp methods\n    var O = {};\n    O[SYMBOL] = function () { return 7; };\n    return ''[KEY](O) != 7;\n  });\n\n  var DELEGATES_TO_EXEC = DELEGATES_TO_SYMBOL && !fails(function () {\n    // Symbol-named RegExp methods call .exec\n    var execCalled = false;\n    var re = /a/;\n\n    if (KEY === 'split') {\n      // We can't use real regex here since it causes deoptimization\n      // and serious performance degradation in V8\n      // https://github.com/zloirock/core-js/issues/306\n      re = {};\n      // RegExp[@@split] doesn't call the regex's exec method, but first creates\n      // a new one. We need to return the patched regex when creating the new one.\n      re.constructor = {};\n      re.constructor[SPECIES] = function () { return re; };\n      re.flags = '';\n      re[SYMBOL] = /./[SYMBOL];\n    }\n\n    re.exec = function () { execCalled = true; return null; };\n\n    re[SYMBOL]('');\n    return !execCalled;\n  });\n\n  if (\n    !DELEGATES_TO_SYMBOL ||\n    !DELEGATES_TO_EXEC ||\n    (KEY === 'replace' && !(\n      REPLACE_SUPPORTS_NAMED_GROUPS &&\n      REPLACE_KEEPS_$0 &&\n      !REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE\n    )) ||\n    (KEY === 'split' && !SPLIT_WORKS_WITH_OVERWRITTEN_EXEC)\n  ) {\n    var nativeRegExpMethod = /./[SYMBOL];\n    var methods = exec(SYMBOL, ''[KEY], function (nativeMethod, regexp, str, arg2, forceStringMethod) {\n      if (regexp.exec === regexpExec) {\n        if (DELEGATES_TO_SYMBOL && !forceStringMethod) {\n          // The native String method already delegates to @@method (this\n          // polyfilled function), leasing to infinite recursion.\n          // We avoid it by directly calling the native @@method method.\n          return { done: true, value: nativeRegExpMethod.call(regexp, str, arg2) };\n        }\n        return { done: true, value: nativeMethod.call(str, regexp, arg2) };\n      }\n      return { done: false };\n    }, {\n      REPLACE_KEEPS_$0: REPLACE_KEEPS_$0,\n      REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE: REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE\n    });\n    var stringMethod = methods[0];\n    var regexMethod = methods[1];\n\n    redefine(String.prototype, KEY, stringMethod);\n    redefine(RegExp.prototype, SYMBOL, length == 2\n      // 21.2.5.8 RegExp.prototype[@@replace](string, replaceValue)\n      // 21.2.5.11 RegExp.prototype[@@split](string, limit)\n      ? function (string, arg) { return regexMethod.call(string, this, arg); }\n      // 21.2.5.6 RegExp.prototype[@@match](string)\n      // 21.2.5.9 RegExp.prototype[@@search](string)\n      : function (string) { return regexMethod.call(string, this); }\n    );\n  }\n\n  if (sham) createNonEnumerableProperty(RegExp.prototype[SYMBOL], 'sham', true);\n};\n","'use strict';\nvar isArray = require('../internals/is-array');\nvar toLength = require('../internals/to-length');\nvar bind = require('../internals/function-bind-context');\n\n// `FlattenIntoArray` abstract operation\n// https://tc39.github.io/proposal-flatMap/#sec-FlattenIntoArray\nvar flattenIntoArray = function (target, original, source, sourceLen, start, depth, mapper, thisArg) {\n  var targetIndex = start;\n  var sourceIndex = 0;\n  var mapFn = mapper ? bind(mapper, thisArg, 3) : false;\n  var element;\n\n  while (sourceIndex < sourceLen) {\n    if (sourceIndex in source) {\n      element = mapFn ? mapFn(source[sourceIndex], sourceIndex, original) : source[sourceIndex];\n\n      if (depth > 0 && isArray(element)) {\n        targetIndex = flattenIntoArray(target, original, element, toLength(element.length), targetIndex, depth - 1) - 1;\n      } else {\n        if (targetIndex >= 0x1FFFFFFFFFFFFF) throw TypeError('Exceed the acceptable array length');\n        target[targetIndex] = element;\n      }\n\n      targetIndex++;\n    }\n    sourceIndex++;\n  }\n  return targetIndex;\n};\n\nmodule.exports = flattenIntoArray;\n","var fails = require('../internals/fails');\n\nmodule.exports = !fails(function () {\n  return Object.isExtensible(Object.preventExtensions({}));\n});\n","var aFunction = require('../internals/a-function');\n\n// optional / simple context binding\nmodule.exports = function (fn, that, length) {\n  aFunction(fn);\n  if (that === undefined) return fn;\n  switch (length) {\n    case 0: return function () {\n      return fn.call(that);\n    };\n    case 1: return function (a) {\n      return fn.call(that, a);\n    };\n    case 2: return function (a, b) {\n      return fn.call(that, a, b);\n    };\n    case 3: return function (a, b, c) {\n      return fn.call(that, a, b, c);\n    };\n  }\n  return function (/* ...args */) {\n    return fn.apply(that, arguments);\n  };\n};\n","'use strict';\nvar aFunction = require('../internals/a-function');\nvar isObject = require('../internals/is-object');\n\nvar slice = [].slice;\nvar factories = {};\n\nvar construct = function (C, argsLength, args) {\n  if (!(argsLength in factories)) {\n    for (var list = [], i = 0; i < argsLength; i++) list[i] = 'a[' + i + ']';\n    // eslint-disable-next-line no-new-func\n    factories[argsLength] = Function('C,a', 'return new C(' + list.join(',') + ')');\n  } return factories[argsLength](C, args);\n};\n\n// `Function.prototype.bind` method implementation\n// https://tc39.github.io/ecma262/#sec-function.prototype.bind\nmodule.exports = Function.bind || function bind(that /* , ...args */) {\n  var fn = aFunction(this);\n  var partArgs = slice.call(arguments, 1);\n  var boundFunction = function bound(/* args... */) {\n    var args = partArgs.concat(slice.call(arguments));\n    return this instanceof boundFunction ? construct(fn, args.length, args) : fn.apply(that, args);\n  };\n  if (isObject(fn.prototype)) boundFunction.prototype = fn.prototype;\n  return boundFunction;\n};\n","var path = require('../internals/path');\nvar global = require('../internals/global');\n\nvar aFunction = function (variable) {\n  return typeof variable == 'function' ? variable : undefined;\n};\n\nmodule.exports = function (namespace, method) {\n  return arguments.length < 2 ? aFunction(path[namespace]) || aFunction(global[namespace])\n    : path[namespace] && path[namespace][method] || global[namespace] && global[namespace][method];\n};\n","var classof = require('../internals/classof');\nvar Iterators = require('../internals/iterators');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar ITERATOR = wellKnownSymbol('iterator');\n\nmodule.exports = function (it) {\n  if (it != undefined) return it[ITERATOR]\n    || it['@@iterator']\n    || Iterators[classof(it)];\n};\n","var anObject = require('../internals/an-object');\nvar getIteratorMethod = require('../internals/get-iterator-method');\n\nmodule.exports = function (it) {\n  var iteratorMethod = getIteratorMethod(it);\n  if (typeof iteratorMethod != 'function') {\n    throw TypeError(String(it) + ' is not iterable');\n  } return anObject(iteratorMethod.call(it));\n};\n","var IS_PURE = require('../internals/is-pure');\nvar getIterator = require('../internals/get-iterator');\n\nmodule.exports = IS_PURE ? getIterator : function (it) {\n  // eslint-disable-next-line no-undef\n  return Map.prototype.entries.call(it);\n};\n","var IS_PURE = require('../internals/is-pure');\nvar getIterator = require('../internals/get-iterator');\n\nmodule.exports = IS_PURE ? getIterator : function (it) {\n  // eslint-disable-next-line no-undef\n  return Set.prototype.values.call(it);\n};\n","var check = function (it) {\n  return it && it.Math == Math && it;\n};\n\n// https://github.com/zloirock/core-js/issues/86#issuecomment-115759028\nmodule.exports =\n  // eslint-disable-next-line no-undef\n  check(typeof globalThis == 'object' && globalThis) ||\n  check(typeof window == 'object' && window) ||\n  check(typeof self == 'object' && self) ||\n  check(typeof global == 'object' && global) ||\n  // eslint-disable-next-line no-new-func\n  Function('return this')();\n","var hasOwnProperty = {}.hasOwnProperty;\n\nmodule.exports = function (it, key) {\n  return hasOwnProperty.call(it, key);\n};\n","module.exports = {};\n","var global = require('../internals/global');\n\nmodule.exports = function (a, b) {\n  var console = global.console;\n  if (console && console.error) {\n    arguments.length === 1 ? console.error(a) : console.error(a, b);\n  }\n};\n","var getBuiltIn = require('../internals/get-built-in');\n\nmodule.exports = getBuiltIn('document', 'documentElement');\n","var DESCRIPTORS = require('../internals/descriptors');\nvar fails = require('../internals/fails');\nvar createElement = require('../internals/document-create-element');\n\n// Thank's IE8 for his funny defineProperty\nmodule.exports = !DESCRIPTORS && !fails(function () {\n  return Object.defineProperty(createElement('div'), 'a', {\n    get: function () { return 7; }\n  }).a != 7;\n});\n","// IEEE754 conversions based on https://github.com/feross/ieee754\n// eslint-disable-next-line no-shadow-restricted-names\nvar Infinity = 1 / 0;\nvar abs = Math.abs;\nvar pow = Math.pow;\nvar floor = Math.floor;\nvar log = Math.log;\nvar LN2 = Math.LN2;\n\nvar pack = function (number, mantissaLength, bytes) {\n  var buffer = new Array(bytes);\n  var exponentLength = bytes * 8 - mantissaLength - 1;\n  var eMax = (1 << exponentLength) - 1;\n  var eBias = eMax >> 1;\n  var rt = mantissaLength === 23 ? pow(2, -24) - pow(2, -77) : 0;\n  var sign = number < 0 || number === 0 && 1 / number < 0 ? 1 : 0;\n  var index = 0;\n  var exponent, mantissa, c;\n  number = abs(number);\n  // eslint-disable-next-line no-self-compare\n  if (number != number || number === Infinity) {\n    // eslint-disable-next-line no-self-compare\n    mantissa = number != number ? 1 : 0;\n    exponent = eMax;\n  } else {\n    exponent = floor(log(number) / LN2);\n    if (number * (c = pow(2, -exponent)) < 1) {\n      exponent--;\n      c *= 2;\n    }\n    if (exponent + eBias >= 1) {\n      number += rt / c;\n    } else {\n      number += rt * pow(2, 1 - eBias);\n    }\n    if (number * c >= 2) {\n      exponent++;\n      c /= 2;\n    }\n    if (exponent + eBias >= eMax) {\n      mantissa = 0;\n      exponent = eMax;\n    } else if (exponent + eBias >= 1) {\n      mantissa = (number * c - 1) * pow(2, mantissaLength);\n      exponent = exponent + eBias;\n    } else {\n      mantissa = number * pow(2, eBias - 1) * pow(2, mantissaLength);\n      exponent = 0;\n    }\n  }\n  for (; mantissaLength >= 8; buffer[index++] = mantissa & 255, mantissa /= 256, mantissaLength -= 8);\n  exponent = exponent << mantissaLength | mantissa;\n  exponentLength += mantissaLength;\n  for (; exponentLength > 0; buffer[index++] = exponent & 255, exponent /= 256, exponentLength -= 8);\n  buffer[--index] |= sign * 128;\n  return buffer;\n};\n\nvar unpack = function (buffer, mantissaLength) {\n  var bytes = buffer.length;\n  var exponentLength = bytes * 8 - mantissaLength - 1;\n  var eMax = (1 << exponentLength) - 1;\n  var eBias = eMax >> 1;\n  var nBits = exponentLength - 7;\n  var index = bytes - 1;\n  var sign = buffer[index--];\n  var exponent = sign & 127;\n  var mantissa;\n  sign >>= 7;\n  for (; nBits > 0; exponent = exponent * 256 + buffer[index], index--, nBits -= 8);\n  mantissa = exponent & (1 << -nBits) - 1;\n  exponent >>= -nBits;\n  nBits += mantissaLength;\n  for (; nBits > 0; mantissa = mantissa * 256 + buffer[index], index--, nBits -= 8);\n  if (exponent === 0) {\n    exponent = 1 - eBias;\n  } else if (exponent === eMax) {\n    return mantissa ? NaN : sign ? -Infinity : Infinity;\n  } else {\n    mantissa = mantissa + pow(2, mantissaLength);\n    exponent = exponent - eBias;\n  } return (sign ? -1 : 1) * mantissa * pow(2, exponent - mantissaLength);\n};\n\nmodule.exports = {\n  pack: pack,\n  unpack: unpack\n};\n","var fails = require('../internals/fails');\nvar classof = require('../internals/classof-raw');\n\nvar split = ''.split;\n\n// fallback for non-array-like ES3 and non-enumerable old V8 strings\nmodule.exports = fails(function () {\n  // throws an error in rhino, see https://github.com/mozilla/rhino/issues/346\n  // eslint-disable-next-line no-prototype-builtins\n  return !Object('z').propertyIsEnumerable(0);\n}) ? function (it) {\n  return classof(it) == 'String' ? split.call(it, '') : Object(it);\n} : Object;\n","var isObject = require('../internals/is-object');\nvar setPrototypeOf = require('../internals/object-set-prototype-of');\n\n// makes subclassing work correct for wrapped built-ins\nmodule.exports = function ($this, dummy, Wrapper) {\n  var NewTarget, NewTargetPrototype;\n  if (\n    // it can work only with native `setPrototypeOf`\n    setPrototypeOf &&\n    // we haven't completely correct pre-ES6 way for getting `new.target`, so use this\n    typeof (NewTarget = dummy.constructor) == 'function' &&\n    NewTarget !== Wrapper &&\n    isObject(NewTargetPrototype = NewTarget.prototype) &&\n    NewTargetPrototype !== Wrapper.prototype\n  ) setPrototypeOf($this, NewTargetPrototype);\n  return $this;\n};\n","var store = require('../internals/shared-store');\n\nvar functionToString = Function.toString;\n\n// this helper broken in `3.4.1-3.4.4`, so we can't use `shared` helper\nif (typeof store.inspectSource != 'function') {\n  store.inspectSource = function (it) {\n    return functionToString.call(it);\n  };\n}\n\nmodule.exports = store.inspectSource;\n","var hiddenKeys = require('../internals/hidden-keys');\nvar isObject = require('../internals/is-object');\nvar has = require('../internals/has');\nvar defineProperty = require('../internals/object-define-property').f;\nvar uid = require('../internals/uid');\nvar FREEZING = require('../internals/freezing');\n\nvar METADATA = uid('meta');\nvar id = 0;\n\nvar isExtensible = Object.isExtensible || function () {\n  return true;\n};\n\nvar setMetadata = function (it) {\n  defineProperty(it, METADATA, { value: {\n    objectID: 'O' + ++id, // object ID\n    weakData: {}          // weak collections IDs\n  } });\n};\n\nvar fastKey = function (it, create) {\n  // return a primitive with prefix\n  if (!isObject(it)) return typeof it == 'symbol' ? it : (typeof it == 'string' ? 'S' : 'P') + it;\n  if (!has(it, METADATA)) {\n    // can't set metadata to uncaught frozen object\n    if (!isExtensible(it)) return 'F';\n    // not necessary to add metadata\n    if (!create) return 'E';\n    // add missing metadata\n    setMetadata(it);\n  // return object ID\n  } return it[METADATA].objectID;\n};\n\nvar getWeakData = function (it, create) {\n  if (!has(it, METADATA)) {\n    // can't set metadata to uncaught frozen object\n    if (!isExtensible(it)) return true;\n    // not necessary to add metadata\n    if (!create) return false;\n    // add missing metadata\n    setMetadata(it);\n  // return the store of weak collections IDs\n  } return it[METADATA].weakData;\n};\n\n// add metadata on freeze-family methods calling\nvar onFreeze = function (it) {\n  if (FREEZING && meta.REQUIRED && isExtensible(it) && !has(it, METADATA)) setMetadata(it);\n  return it;\n};\n\nvar meta = module.exports = {\n  REQUIRED: false,\n  fastKey: fastKey,\n  getWeakData: getWeakData,\n  onFreeze: onFreeze\n};\n\nhiddenKeys[METADATA] = true;\n","var NATIVE_WEAK_MAP = require('../internals/native-weak-map');\nvar global = require('../internals/global');\nvar isObject = require('../internals/is-object');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar objectHas = require('../internals/has');\nvar sharedKey = require('../internals/shared-key');\nvar hiddenKeys = require('../internals/hidden-keys');\n\nvar WeakMap = global.WeakMap;\nvar set, get, has;\n\nvar enforce = function (it) {\n  return has(it) ? get(it) : set(it, {});\n};\n\nvar getterFor = function (TYPE) {\n  return function (it) {\n    var state;\n    if (!isObject(it) || (state = get(it)).type !== TYPE) {\n      throw TypeError('Incompatible receiver, ' + TYPE + ' required');\n    } return state;\n  };\n};\n\nif (NATIVE_WEAK_MAP) {\n  var store = new WeakMap();\n  var wmget = store.get;\n  var wmhas = store.has;\n  var wmset = store.set;\n  set = function (it, metadata) {\n    wmset.call(store, it, metadata);\n    return metadata;\n  };\n  get = function (it) {\n    return wmget.call(store, it) || {};\n  };\n  has = function (it) {\n    return wmhas.call(store, it);\n  };\n} else {\n  var STATE = sharedKey('state');\n  hiddenKeys[STATE] = true;\n  set = function (it, metadata) {\n    createNonEnumerableProperty(it, STATE, metadata);\n    return metadata;\n  };\n  get = function (it) {\n    return objectHas(it, STATE) ? it[STATE] : {};\n  };\n  has = function (it) {\n    return objectHas(it, STATE);\n  };\n}\n\nmodule.exports = {\n  set: set,\n  get: get,\n  has: has,\n  enforce: enforce,\n  getterFor: getterFor\n};\n","var wellKnownSymbol = require('../internals/well-known-symbol');\nvar Iterators = require('../internals/iterators');\n\nvar ITERATOR = wellKnownSymbol('iterator');\nvar ArrayPrototype = Array.prototype;\n\n// check on default Array iterator\nmodule.exports = function (it) {\n  return it !== undefined && (Iterators.Array === it || ArrayPrototype[ITERATOR] === it);\n};\n","var classof = require('../internals/classof-raw');\n\n// `IsArray` abstract operation\n// https://tc39.github.io/ecma262/#sec-isarray\nmodule.exports = Array.isArray || function isArray(arg) {\n  return classof(arg) == 'Array';\n};\n","var fails = require('../internals/fails');\n\nvar replacement = /#|\\.prototype\\./;\n\nvar isForced = function (feature, detection) {\n  var value = data[normalize(feature)];\n  return value == POLYFILL ? true\n    : value == NATIVE ? false\n    : typeof detection == 'function' ? fails(detection)\n    : !!detection;\n};\n\nvar normalize = isForced.normalize = function (string) {\n  return String(string).replace(replacement, '.').toLowerCase();\n};\n\nvar data = isForced.data = {};\nvar NATIVE = isForced.NATIVE = 'N';\nvar POLYFILL = isForced.POLYFILL = 'P';\n\nmodule.exports = isForced;\n","var isObject = require('../internals/is-object');\n\nvar floor = Math.floor;\n\n// `Number.isInteger` method implementation\n// https://tc39.github.io/ecma262/#sec-number.isinteger\nmodule.exports = function isInteger(it) {\n  return !isObject(it) && isFinite(it) && floor(it) === it;\n};\n","module.exports = function (it) {\n  return typeof it === 'object' ? it !== null : typeof it === 'function';\n};\n","module.exports = false;\n","var isObject = require('../internals/is-object');\nvar classof = require('../internals/classof-raw');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar MATCH = wellKnownSymbol('match');\n\n// `IsRegExp` abstract operation\n// https://tc39.github.io/ecma262/#sec-isregexp\nmodule.exports = function (it) {\n  var isRegExp;\n  return isObject(it) && ((isRegExp = it[MATCH]) !== undefined ? !!isRegExp : classof(it) == 'RegExp');\n};\n","var anObject = require('../internals/an-object');\nvar isArrayIteratorMethod = require('../internals/is-array-iterator-method');\nvar toLength = require('../internals/to-length');\nvar bind = require('../internals/function-bind-context');\nvar getIteratorMethod = require('../internals/get-iterator-method');\nvar callWithSafeIterationClosing = require('../internals/call-with-safe-iteration-closing');\n\nvar Result = function (stopped, result) {\n  this.stopped = stopped;\n  this.result = result;\n};\n\nvar iterate = module.exports = function (iterable, fn, that, AS_ENTRIES, IS_ITERATOR) {\n  var boundFunction = bind(fn, that, AS_ENTRIES ? 2 : 1);\n  var iterator, iterFn, index, length, result, next, step;\n\n  if (IS_ITERATOR) {\n    iterator = iterable;\n  } else {\n    iterFn = getIteratorMethod(iterable);\n    if (typeof iterFn != 'function') throw TypeError('Target is not iterable');\n    // optimisation for array iterators\n    if (isArrayIteratorMethod(iterFn)) {\n      for (index = 0, length = toLength(iterable.length); length > index; index++) {\n        result = AS_ENTRIES\n          ? boundFunction(anObject(step = iterable[index])[0], step[1])\n          : boundFunction(iterable[index]);\n        if (result && result instanceof Result) return result;\n      } return new Result(false);\n    }\n    iterator = iterFn.call(iterable);\n  }\n\n  next = iterator.next;\n  while (!(step = next.call(iterator)).done) {\n    result = callWithSafeIterationClosing(iterator, boundFunction, step.value, AS_ENTRIES);\n    if (typeof result == 'object' && result && result instanceof Result) return result;\n  } return new Result(false);\n};\n\niterate.stop = function (result) {\n  return new Result(true, result);\n};\n","'use strict';\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar has = require('../internals/has');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar IS_PURE = require('../internals/is-pure');\n\nvar ITERATOR = wellKnownSymbol('iterator');\nvar BUGGY_SAFARI_ITERATORS = false;\n\nvar returnThis = function () { return this; };\n\n// `%IteratorPrototype%` object\n// https://tc39.github.io/ecma262/#sec-%iteratorprototype%-object\nvar IteratorPrototype, PrototypeOfArrayIteratorPrototype, arrayIterator;\n\nif ([].keys) {\n  arrayIterator = [].keys();\n  // Safari 8 has buggy iterators w/o `next`\n  if (!('next' in arrayIterator)) BUGGY_SAFARI_ITERATORS = true;\n  else {\n    PrototypeOfArrayIteratorPrototype = getPrototypeOf(getPrototypeOf(arrayIterator));\n    if (PrototypeOfArrayIteratorPrototype !== Object.prototype) IteratorPrototype = PrototypeOfArrayIteratorPrototype;\n  }\n}\n\nif (IteratorPrototype == undefined) IteratorPrototype = {};\n\n// 25.1.2.1.1 %IteratorPrototype%[@@iterator]()\nif (!IS_PURE && !has(IteratorPrototype, ITERATOR)) {\n  createNonEnumerableProperty(IteratorPrototype, ITERATOR, returnThis);\n}\n\nmodule.exports = {\n  IteratorPrototype: IteratorPrototype,\n  BUGGY_SAFARI_ITERATORS: BUGGY_SAFARI_ITERATORS\n};\n","module.exports = {};\n","var nativeExpm1 = Math.expm1;\nvar exp = Math.exp;\n\n// `Math.expm1` method implementation\n// https://tc39.github.io/ecma262/#sec-math.expm1\nmodule.exports = (!nativeExpm1\n  // Old FF bug\n  || nativeExpm1(10) > 22025.465794806719 || nativeExpm1(10) < 22025.4657948067165168\n  // Tor Browser bug\n  || nativeExpm1(-2e-17) != -2e-17\n) ? function expm1(x) {\n  return (x = +x) == 0 ? x : x > -1e-6 && x < 1e-6 ? x + x * x / 2 : exp(x) - 1;\n} : nativeExpm1;\n","var sign = require('../internals/math-sign');\n\nvar abs = Math.abs;\nvar pow = Math.pow;\nvar EPSILON = pow(2, -52);\nvar EPSILON32 = pow(2, -23);\nvar MAX32 = pow(2, 127) * (2 - EPSILON32);\nvar MIN32 = pow(2, -126);\n\nvar roundTiesToEven = function (n) {\n  return n + 1 / EPSILON - 1 / EPSILON;\n};\n\n// `Math.fround` method implementation\n// https://tc39.github.io/ecma262/#sec-math.fround\nmodule.exports = Math.fround || function fround(x) {\n  var $abs = abs(x);\n  var $sign = sign(x);\n  var a, result;\n  if ($abs < MIN32) return $sign * roundTiesToEven($abs / MIN32 / EPSILON32) * MIN32 * EPSILON32;\n  a = (1 + EPSILON32 / EPSILON) * $abs;\n  result = a - (a - $abs);\n  // eslint-disable-next-line no-self-compare\n  if (result > MAX32 || result != result) return $sign * Infinity;\n  return $sign * result;\n};\n","var log = Math.log;\n\n// `Math.log1p` method implementation\n// https://tc39.github.io/ecma262/#sec-math.log1p\nmodule.exports = Math.log1p || function log1p(x) {\n  return (x = +x) > -1e-8 && x < 1e-8 ? x - x * x / 2 : log(1 + x);\n};\n","// `Math.scale` method implementation\n// https://rwaldron.github.io/proposal-math-extensions/\nmodule.exports = Math.scale || function scale(x, inLow, inHigh, outLow, outHigh) {\n  if (\n    arguments.length === 0\n      /* eslint-disable no-self-compare */\n      || x != x\n      || inLow != inLow\n      || inHigh != inHigh\n      || outLow != outLow\n      || outHigh != outHigh\n      /* eslint-enable no-self-compare */\n  ) return NaN;\n  if (x === Infinity || x === -Infinity) return x;\n  return (x - inLow) * (outHigh - outLow) / (inHigh - inLow) + outLow;\n};\n","// `Math.sign` method implementation\n// https://tc39.github.io/ecma262/#sec-math.sign\nmodule.exports = Math.sign || function sign(x) {\n  // eslint-disable-next-line no-self-compare\n  return (x = +x) == 0 || x != x ? x : x < 0 ? -1 : 1;\n};\n","var global = require('../internals/global');\nvar getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\nvar classof = require('../internals/classof-raw');\nvar macrotask = require('../internals/task').set;\nvar IS_IOS = require('../internals/engine-is-ios');\n\nvar MutationObserver = global.MutationObserver || global.WebKitMutationObserver;\nvar process = global.process;\nvar Promise = global.Promise;\nvar IS_NODE = classof(process) == 'process';\n// Node.js 11 shows ExperimentalWarning on getting `queueMicrotask`\nvar queueMicrotaskDescriptor = getOwnPropertyDescriptor(global, 'queueMicrotask');\nvar queueMicrotask = queueMicrotaskDescriptor && queueMicrotaskDescriptor.value;\n\nvar flush, head, last, notify, toggle, node, promise, then;\n\n// modern engines have queueMicrotask method\nif (!queueMicrotask) {\n  flush = function () {\n    var parent, fn;\n    if (IS_NODE && (parent = process.domain)) parent.exit();\n    while (head) {\n      fn = head.fn;\n      head = head.next;\n      try {\n        fn();\n      } catch (error) {\n        if (head) notify();\n        else last = undefined;\n        throw error;\n      }\n    } last = undefined;\n    if (parent) parent.enter();\n  };\n\n  // Node.js\n  if (IS_NODE) {\n    notify = function () {\n      process.nextTick(flush);\n    };\n  // browsers with MutationObserver, except iOS - https://github.com/zloirock/core-js/issues/339\n  } else if (MutationObserver && !IS_IOS) {\n    toggle = true;\n    node = document.createTextNode('');\n    new MutationObserver(flush).observe(node, { characterData: true });\n    notify = function () {\n      node.data = toggle = !toggle;\n    };\n  // environments with maybe non-completely correct, but existent Promise\n  } else if (Promise && Promise.resolve) {\n    // Promise.resolve without an argument throws an error in LG WebOS 2\n    promise = Promise.resolve(undefined);\n    then = promise.then;\n    notify = function () {\n      then.call(promise, flush);\n    };\n  // for other environments - macrotask based on:\n  // - setImmediate\n  // - MessageChannel\n  // - window.postMessag\n  // - onreadystatechange\n  // - setTimeout\n  } else {\n    notify = function () {\n      // strange IE + webpack dev server bug - use .call(global)\n      macrotask.call(global, flush);\n    };\n  }\n}\n\nmodule.exports = queueMicrotask || function (fn) {\n  var task = { fn: fn, next: undefined };\n  if (last) last.next = task;\n  if (!head) {\n    head = task;\n    notify();\n  } last = task;\n};\n","var global = require('../internals/global');\n\nmodule.exports = global.Promise;\n","var fails = require('../internals/fails');\n\nmodule.exports = !!Object.getOwnPropertySymbols && !fails(function () {\n  // Chrome 38 Symbol has incorrect toString conversion\n  // eslint-disable-next-line no-undef\n  return !String(Symbol());\n});\n","var fails = require('../internals/fails');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar IS_PURE = require('../internals/is-pure');\n\nvar ITERATOR = wellKnownSymbol('iterator');\n\nmodule.exports = !fails(function () {\n  var url = new URL('b?a=1&b=2&c=3', 'http://a');\n  var searchParams = url.searchParams;\n  var result = '';\n  url.pathname = 'c%20d';\n  searchParams.forEach(function (value, key) {\n    searchParams['delete']('b');\n    result += key + value;\n  });\n  return (IS_PURE && !url.toJSON)\n    || !searchParams.sort\n    || url.href !== 'http://a/c%20d?a=1&c=3'\n    || searchParams.get('c') !== '3'\n    || String(new URLSearchParams('?a=1')) !== 'a=1'\n    || !searchParams[ITERATOR]\n    // throws in Edge\n    || new URL('https://a@b').username !== 'a'\n    || new URLSearchParams(new URLSearchParams('a=b')).get('a') !== 'b'\n    // not punycoded in Edge\n    || new URL('http://тест').host !== 'xn--e1aybc'\n    // not escaped in Chrome 62-\n    || new URL('http://a#б').hash !== '#%D0%B1'\n    // fails in Chrome 66-\n    || result !== 'a1c3'\n    // throws in Safari\n    || new URL('http://x', undefined).host !== 'x';\n});\n","var global = require('../internals/global');\nvar inspectSource = require('../internals/inspect-source');\n\nvar WeakMap = global.WeakMap;\n\nmodule.exports = typeof WeakMap === 'function' && /native code/.test(inspectSource(WeakMap));\n","'use strict';\nvar aFunction = require('../internals/a-function');\n\nvar PromiseCapability = function (C) {\n  var resolve, reject;\n  this.promise = new C(function ($$resolve, $$reject) {\n    if (resolve !== undefined || reject !== undefined) throw TypeError('Bad Promise constructor');\n    resolve = $$resolve;\n    reject = $$reject;\n  });\n  this.resolve = aFunction(resolve);\n  this.reject = aFunction(reject);\n};\n\n// 25.4.1.5 NewPromiseCapability(C)\nmodule.exports.f = function (C) {\n  return new PromiseCapability(C);\n};\n","var isRegExp = require('../internals/is-regexp');\n\nmodule.exports = function (it) {\n  if (isRegExp(it)) {\n    throw TypeError(\"The method doesn't accept regular expressions\");\n  } return it;\n};\n","var global = require('../internals/global');\n\nvar globalIsFinite = global.isFinite;\n\n// `Number.isFinite` method\n// https://tc39.github.io/ecma262/#sec-number.isfinite\nmodule.exports = Number.isFinite || function isFinite(it) {\n  return typeof it == 'number' && globalIsFinite(it);\n};\n","var global = require('../internals/global');\nvar trim = require('../internals/string-trim').trim;\nvar whitespaces = require('../internals/whitespaces');\n\nvar $parseFloat = global.parseFloat;\nvar FORCED = 1 / $parseFloat(whitespaces + '-0') !== -Infinity;\n\n// `parseFloat` method\n// https://tc39.github.io/ecma262/#sec-parsefloat-string\nmodule.exports = FORCED ? function parseFloat(string) {\n  var trimmedString = trim(String(string));\n  var result = $parseFloat(trimmedString);\n  return result === 0 && trimmedString.charAt(0) == '-' ? -0 : result;\n} : $parseFloat;\n","var global = require('../internals/global');\nvar trim = require('../internals/string-trim').trim;\nvar whitespaces = require('../internals/whitespaces');\n\nvar $parseInt = global.parseInt;\nvar hex = /^[+-]?0[Xx]/;\nvar FORCED = $parseInt(whitespaces + '08') !== 8 || $parseInt(whitespaces + '0x16') !== 22;\n\n// `parseInt` method\n// https://tc39.github.io/ecma262/#sec-parseint-string-radix\nmodule.exports = FORCED ? function parseInt(string, radix) {\n  var S = trim(String(string));\n  return $parseInt(S, (radix >>> 0) || (hex.test(S) ? 16 : 10));\n} : $parseInt;\n","'use strict';\nvar DESCRIPTORS = require('../internals/descriptors');\nvar fails = require('../internals/fails');\nvar objectKeys = require('../internals/object-keys');\nvar getOwnPropertySymbolsModule = require('../internals/object-get-own-property-symbols');\nvar propertyIsEnumerableModule = require('../internals/object-property-is-enumerable');\nvar toObject = require('../internals/to-object');\nvar IndexedObject = require('../internals/indexed-object');\n\nvar nativeAssign = Object.assign;\nvar defineProperty = Object.defineProperty;\n\n// `Object.assign` method\n// https://tc39.github.io/ecma262/#sec-object.assign\nmodule.exports = !nativeAssign || fails(function () {\n  // should have correct order of operations (Edge bug)\n  if (DESCRIPTORS && nativeAssign({ b: 1 }, nativeAssign(defineProperty({}, 'a', {\n    enumerable: true,\n    get: function () {\n      defineProperty(this, 'b', {\n        value: 3,\n        enumerable: false\n      });\n    }\n  }), { b: 2 })).b !== 1) return true;\n  // should work with symbols and should have deterministic property order (V8 bug)\n  var A = {};\n  var B = {};\n  // eslint-disable-next-line no-undef\n  var symbol = Symbol();\n  var alphabet = 'abcdefghijklmnopqrst';\n  A[symbol] = 7;\n  alphabet.split('').forEach(function (chr) { B[chr] = chr; });\n  return nativeAssign({}, A)[symbol] != 7 || objectKeys(nativeAssign({}, B)).join('') != alphabet;\n}) ? function assign(target, source) { // eslint-disable-line no-unused-vars\n  var T = toObject(target);\n  var argumentsLength = arguments.length;\n  var index = 1;\n  var getOwnPropertySymbols = getOwnPropertySymbolsModule.f;\n  var propertyIsEnumerable = propertyIsEnumerableModule.f;\n  while (argumentsLength > index) {\n    var S = IndexedObject(arguments[index++]);\n    var keys = getOwnPropertySymbols ? objectKeys(S).concat(getOwnPropertySymbols(S)) : objectKeys(S);\n    var length = keys.length;\n    var j = 0;\n    var key;\n    while (length > j) {\n      key = keys[j++];\n      if (!DESCRIPTORS || propertyIsEnumerable.call(S, key)) T[key] = S[key];\n    }\n  } return T;\n} : nativeAssign;\n","var anObject = require('../internals/an-object');\nvar defineProperties = require('../internals/object-define-properties');\nvar enumBugKeys = require('../internals/enum-bug-keys');\nvar hiddenKeys = require('../internals/hidden-keys');\nvar html = require('../internals/html');\nvar documentCreateElement = require('../internals/document-create-element');\nvar sharedKey = require('../internals/shared-key');\n\nvar GT = '>';\nvar LT = '<';\nvar PROTOTYPE = 'prototype';\nvar SCRIPT = 'script';\nvar IE_PROTO = sharedKey('IE_PROTO');\n\nvar EmptyConstructor = function () { /* empty */ };\n\nvar scriptTag = function (content) {\n  return LT + SCRIPT + GT + content + LT + '/' + SCRIPT + GT;\n};\n\n// Create object with fake `null` prototype: use ActiveX Object with cleared prototype\nvar NullProtoObjectViaActiveX = function (activeXDocument) {\n  activeXDocument.write(scriptTag(''));\n  activeXDocument.close();\n  var temp = activeXDocument.parentWindow.Object;\n  activeXDocument = null; // avoid memory leak\n  return temp;\n};\n\n// Create object with fake `null` prototype: use iframe Object with cleared prototype\nvar NullProtoObjectViaIFrame = function () {\n  // Thrash, waste and sodomy: IE GC bug\n  var iframe = documentCreateElement('iframe');\n  var JS = 'java' + SCRIPT + ':';\n  var iframeDocument;\n  iframe.style.display = 'none';\n  html.appendChild(iframe);\n  // https://github.com/zloirock/core-js/issues/475\n  iframe.src = String(JS);\n  iframeDocument = iframe.contentWindow.document;\n  iframeDocument.open();\n  iframeDocument.write(scriptTag('document.F=Object'));\n  iframeDocument.close();\n  return iframeDocument.F;\n};\n\n// Check for document.domain and active x support\n// No need to use active x approach when document.domain is not set\n// see https://github.com/es-shims/es5-shim/issues/150\n// variation of https://github.com/kitcambridge/es5-shim/commit/4f738ac066346\n// avoid IE GC bug\nvar activeXDocument;\nvar NullProtoObject = function () {\n  try {\n    /* global ActiveXObject */\n    activeXDocument = document.domain && new ActiveXObject('htmlfile');\n  } catch (error) { /* ignore */ }\n  NullProtoObject = activeXDocument ? NullProtoObjectViaActiveX(activeXDocument) : NullProtoObjectViaIFrame();\n  var length = enumBugKeys.length;\n  while (length--) delete NullProtoObject[PROTOTYPE][enumBugKeys[length]];\n  return NullProtoObject();\n};\n\nhiddenKeys[IE_PROTO] = true;\n\n// `Object.create` method\n// https://tc39.github.io/ecma262/#sec-object.create\nmodule.exports = Object.create || function create(O, Properties) {\n  var result;\n  if (O !== null) {\n    EmptyConstructor[PROTOTYPE] = anObject(O);\n    result = new EmptyConstructor();\n    EmptyConstructor[PROTOTYPE] = null;\n    // add \"__proto__\" for Object.getPrototypeOf polyfill\n    result[IE_PROTO] = O;\n  } else result = NullProtoObject();\n  return Properties === undefined ? result : defineProperties(result, Properties);\n};\n","var DESCRIPTORS = require('../internals/descriptors');\nvar definePropertyModule = require('../internals/object-define-property');\nvar anObject = require('../internals/an-object');\nvar objectKeys = require('../internals/object-keys');\n\n// `Object.defineProperties` method\n// https://tc39.github.io/ecma262/#sec-object.defineproperties\nmodule.exports = DESCRIPTORS ? Object.defineProperties : function defineProperties(O, Properties) {\n  anObject(O);\n  var keys = objectKeys(Properties);\n  var length = keys.length;\n  var index = 0;\n  var key;\n  while (length > index) definePropertyModule.f(O, key = keys[index++], Properties[key]);\n  return O;\n};\n","var DESCRIPTORS = require('../internals/descriptors');\nvar IE8_DOM_DEFINE = require('../internals/ie8-dom-define');\nvar anObject = require('../internals/an-object');\nvar toPrimitive = require('../internals/to-primitive');\n\nvar nativeDefineProperty = Object.defineProperty;\n\n// `Object.defineProperty` method\n// https://tc39.github.io/ecma262/#sec-object.defineproperty\nexports.f = DESCRIPTORS ? nativeDefineProperty : function defineProperty(O, P, Attributes) {\n  anObject(O);\n  P = toPrimitive(P, true);\n  anObject(Attributes);\n  if (IE8_DOM_DEFINE) try {\n    return nativeDefineProperty(O, P, Attributes);\n  } catch (error) { /* empty */ }\n  if ('get' in Attributes || 'set' in Attributes) throw TypeError('Accessors not supported');\n  if ('value' in Attributes) O[P] = Attributes.value;\n  return O;\n};\n","var DESCRIPTORS = require('../internals/descriptors');\nvar propertyIsEnumerableModule = require('../internals/object-property-is-enumerable');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar toPrimitive = require('../internals/to-primitive');\nvar has = require('../internals/has');\nvar IE8_DOM_DEFINE = require('../internals/ie8-dom-define');\n\nvar nativeGetOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;\n\n// `Object.getOwnPropertyDescriptor` method\n// https://tc39.github.io/ecma262/#sec-object.getownpropertydescriptor\nexports.f = DESCRIPTORS ? nativeGetOwnPropertyDescriptor : function getOwnPropertyDescriptor(O, P) {\n  O = toIndexedObject(O);\n  P = toPrimitive(P, true);\n  if (IE8_DOM_DEFINE) try {\n    return nativeGetOwnPropertyDescriptor(O, P);\n  } catch (error) { /* empty */ }\n  if (has(O, P)) return createPropertyDescriptor(!propertyIsEnumerableModule.f.call(O, P), O[P]);\n};\n","var toIndexedObject = require('../internals/to-indexed-object');\nvar nativeGetOwnPropertyNames = require('../internals/object-get-own-property-names').f;\n\nvar toString = {}.toString;\n\nvar windowNames = typeof window == 'object' && window && Object.getOwnPropertyNames\n  ? Object.getOwnPropertyNames(window) : [];\n\nvar getWindowNames = function (it) {\n  try {\n    return nativeGetOwnPropertyNames(it);\n  } catch (error) {\n    return windowNames.slice();\n  }\n};\n\n// fallback for IE11 buggy Object.getOwnPropertyNames with iframe and window\nmodule.exports.f = function getOwnPropertyNames(it) {\n  return windowNames && toString.call(it) == '[object Window]'\n    ? getWindowNames(it)\n    : nativeGetOwnPropertyNames(toIndexedObject(it));\n};\n","var internalObjectKeys = require('../internals/object-keys-internal');\nvar enumBugKeys = require('../internals/enum-bug-keys');\n\nvar hiddenKeys = enumBugKeys.concat('length', 'prototype');\n\n// `Object.getOwnPropertyNames` method\n// https://tc39.github.io/ecma262/#sec-object.getownpropertynames\nexports.f = Object.getOwnPropertyNames || function getOwnPropertyNames(O) {\n  return internalObjectKeys(O, hiddenKeys);\n};\n","exports.f = Object.getOwnPropertySymbols;\n","var has = require('../internals/has');\nvar toObject = require('../internals/to-object');\nvar sharedKey = require('../internals/shared-key');\nvar CORRECT_PROTOTYPE_GETTER = require('../internals/correct-prototype-getter');\n\nvar IE_PROTO = sharedKey('IE_PROTO');\nvar ObjectPrototype = Object.prototype;\n\n// `Object.getPrototypeOf` method\n// https://tc39.github.io/ecma262/#sec-object.getprototypeof\nmodule.exports = CORRECT_PROTOTYPE_GETTER ? Object.getPrototypeOf : function (O) {\n  O = toObject(O);\n  if (has(O, IE_PROTO)) return O[IE_PROTO];\n  if (typeof O.constructor == 'function' && O instanceof O.constructor) {\n    return O.constructor.prototype;\n  } return O instanceof Object ? ObjectPrototype : null;\n};\n","var has = require('../internals/has');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar indexOf = require('../internals/array-includes').indexOf;\nvar hiddenKeys = require('../internals/hidden-keys');\n\nmodule.exports = function (object, names) {\n  var O = toIndexedObject(object);\n  var i = 0;\n  var result = [];\n  var key;\n  for (key in O) !has(hiddenKeys, key) && has(O, key) && result.push(key);\n  // Don't enum bug & hidden keys\n  while (names.length > i) if (has(O, key = names[i++])) {\n    ~indexOf(result, key) || result.push(key);\n  }\n  return result;\n};\n","var internalObjectKeys = require('../internals/object-keys-internal');\nvar enumBugKeys = require('../internals/enum-bug-keys');\n\n// `Object.keys` method\n// https://tc39.github.io/ecma262/#sec-object.keys\nmodule.exports = Object.keys || function keys(O) {\n  return internalObjectKeys(O, enumBugKeys);\n};\n","'use strict';\nvar nativePropertyIsEnumerable = {}.propertyIsEnumerable;\nvar getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;\n\n// Nashorn ~ JDK8 bug\nvar NASHORN_BUG = getOwnPropertyDescriptor && !nativePropertyIsEnumerable.call({ 1: 2 }, 1);\n\n// `Object.prototype.propertyIsEnumerable` method implementation\n// https://tc39.github.io/ecma262/#sec-object.prototype.propertyisenumerable\nexports.f = NASHORN_BUG ? function propertyIsEnumerable(V) {\n  var descriptor = getOwnPropertyDescriptor(this, V);\n  return !!descriptor && descriptor.enumerable;\n} : nativePropertyIsEnumerable;\n","'use strict';\nvar IS_PURE = require('../internals/is-pure');\nvar global = require('../internals/global');\nvar fails = require('../internals/fails');\n\n// Forced replacement object prototype accessors methods\nmodule.exports = IS_PURE || !fails(function () {\n  var key = Math.random();\n  // In FF throws only define methods\n  // eslint-disable-next-line no-undef, no-useless-call\n  __defineSetter__.call(null, key, function () { /* empty */ });\n  delete global[key];\n});\n","var anObject = require('../internals/an-object');\nvar aPossiblePrototype = require('../internals/a-possible-prototype');\n\n// `Object.setPrototypeOf` method\n// https://tc39.github.io/ecma262/#sec-object.setprototypeof\n// Works with __proto__ only. Old v8 can't work with null proto objects.\n/* eslint-disable no-proto */\nmodule.exports = Object.setPrototypeOf || ('__proto__' in {} ? function () {\n  var CORRECT_SETTER = false;\n  var test = {};\n  var setter;\n  try {\n    setter = Object.getOwnPropertyDescriptor(Object.prototype, '__proto__').set;\n    setter.call(test, []);\n    CORRECT_SETTER = test instanceof Array;\n  } catch (error) { /* empty */ }\n  return function setPrototypeOf(O, proto) {\n    anObject(O);\n    aPossiblePrototype(proto);\n    if (CORRECT_SETTER) setter.call(O, proto);\n    else O.__proto__ = proto;\n    return O;\n  };\n}() : undefined);\n","var DESCRIPTORS = require('../internals/descriptors');\nvar objectKeys = require('../internals/object-keys');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar propertyIsEnumerable = require('../internals/object-property-is-enumerable').f;\n\n// `Object.{ entries, values }` methods implementation\nvar createMethod = function (TO_ENTRIES) {\n  return function (it) {\n    var O = toIndexedObject(it);\n    var keys = objectKeys(O);\n    var length = keys.length;\n    var i = 0;\n    var result = [];\n    var key;\n    while (length > i) {\n      key = keys[i++];\n      if (!DESCRIPTORS || propertyIsEnumerable.call(O, key)) {\n        result.push(TO_ENTRIES ? [key, O[key]] : O[key]);\n      }\n    }\n    return result;\n  };\n};\n\nmodule.exports = {\n  // `Object.entries` method\n  // https://tc39.github.io/ecma262/#sec-object.entries\n  entries: createMethod(true),\n  // `Object.values` method\n  // https://tc39.github.io/ecma262/#sec-object.values\n  values: createMethod(false)\n};\n","'use strict';\nvar TO_STRING_TAG_SUPPORT = require('../internals/to-string-tag-support');\nvar classof = require('../internals/classof');\n\n// `Object.prototype.toString` method implementation\n// https://tc39.github.io/ecma262/#sec-object.prototype.tostring\nmodule.exports = TO_STRING_TAG_SUPPORT ? {}.toString : function toString() {\n  return '[object ' + classof(this) + ']';\n};\n","var getBuiltIn = require('../internals/get-built-in');\nvar getOwnPropertyNamesModule = require('../internals/object-get-own-property-names');\nvar getOwnPropertySymbolsModule = require('../internals/object-get-own-property-symbols');\nvar anObject = require('../internals/an-object');\n\n// all object keys, includes non-enumerable and symbols\nmodule.exports = getBuiltIn('Reflect', 'ownKeys') || function ownKeys(it) {\n  var keys = getOwnPropertyNamesModule.f(anObject(it));\n  var getOwnPropertySymbols = getOwnPropertySymbolsModule.f;\n  return getOwnPropertySymbols ? keys.concat(getOwnPropertySymbols(it)) : keys;\n};\n","var global = require('../internals/global');\n\nmodule.exports = global;\n","module.exports = function (exec) {\n  try {\n    return { error: false, value: exec() };\n  } catch (error) {\n    return { error: true, value: error };\n  }\n};\n","var anObject = require('../internals/an-object');\nvar isObject = require('../internals/is-object');\nvar newPromiseCapability = require('../internals/new-promise-capability');\n\nmodule.exports = function (C, x) {\n  anObject(C);\n  if (isObject(x) && x.constructor === C) return x;\n  var promiseCapability = newPromiseCapability.f(C);\n  var resolve = promiseCapability.resolve;\n  resolve(x);\n  return promiseCapability.promise;\n};\n","var redefine = require('../internals/redefine');\n\nmodule.exports = function (target, src, options) {\n  for (var key in src) redefine(target, key, src[key], options);\n  return target;\n};\n","var global = require('../internals/global');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar has = require('../internals/has');\nvar setGlobal = require('../internals/set-global');\nvar inspectSource = require('../internals/inspect-source');\nvar InternalStateModule = require('../internals/internal-state');\n\nvar getInternalState = InternalStateModule.get;\nvar enforceInternalState = InternalStateModule.enforce;\nvar TEMPLATE = String(String).split('String');\n\n(module.exports = function (O, key, value, options) {\n  var unsafe = options ? !!options.unsafe : false;\n  var simple = options ? !!options.enumerable : false;\n  var noTargetGet = options ? !!options.noTargetGet : false;\n  if (typeof value == 'function') {\n    if (typeof key == 'string' && !has(value, 'name')) createNonEnumerableProperty(value, 'name', key);\n    enforceInternalState(value).source = TEMPLATE.join(typeof key == 'string' ? key : '');\n  }\n  if (O === global) {\n    if (simple) O[key] = value;\n    else setGlobal(key, value);\n    return;\n  } else if (!unsafe) {\n    delete O[key];\n  } else if (!noTargetGet && O[key]) {\n    simple = true;\n  }\n  if (simple) O[key] = value;\n  else createNonEnumerableProperty(O, key, value);\n// add fake Function#toString for correct work wrapped methods / constructors with methods like LoDash isNative\n})(Function.prototype, 'toString', function toString() {\n  return typeof this == 'function' && getInternalState(this).source || inspectSource(this);\n});\n","// TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`\nvar Map = require('../modules/es.map');\nvar WeakMap = require('../modules/es.weak-map');\nvar shared = require('../internals/shared');\n\nvar metadata = shared('metadata');\nvar store = metadata.store || (metadata.store = new WeakMap());\n\nvar getOrCreateMetadataMap = function (target, targetKey, create) {\n  var targetMetadata = store.get(target);\n  if (!targetMetadata) {\n    if (!create) return;\n    store.set(target, targetMetadata = new Map());\n  }\n  var keyMetadata = targetMetadata.get(targetKey);\n  if (!keyMetadata) {\n    if (!create) return;\n    targetMetadata.set(targetKey, keyMetadata = new Map());\n  } return keyMetadata;\n};\n\nvar ordinaryHasOwnMetadata = function (MetadataKey, O, P) {\n  var metadataMap = getOrCreateMetadataMap(O, P, false);\n  return metadataMap === undefined ? false : metadataMap.has(MetadataKey);\n};\n\nvar ordinaryGetOwnMetadata = function (MetadataKey, O, P) {\n  var metadataMap = getOrCreateMetadataMap(O, P, false);\n  return metadataMap === undefined ? undefined : metadataMap.get(MetadataKey);\n};\n\nvar ordinaryDefineOwnMetadata = function (MetadataKey, MetadataValue, O, P) {\n  getOrCreateMetadataMap(O, P, true).set(MetadataKey, MetadataValue);\n};\n\nvar ordinaryOwnMetadataKeys = function (target, targetKey) {\n  var metadataMap = getOrCreateMetadataMap(target, targetKey, false);\n  var keys = [];\n  if (metadataMap) metadataMap.forEach(function (_, key) { keys.push(key); });\n  return keys;\n};\n\nvar toMetadataKey = function (it) {\n  return it === undefined || typeof it == 'symbol' ? it : String(it);\n};\n\nmodule.exports = {\n  store: store,\n  getMap: getOrCreateMetadataMap,\n  has: ordinaryHasOwnMetadata,\n  get: ordinaryGetOwnMetadata,\n  set: ordinaryDefineOwnMetadata,\n  keys: ordinaryOwnMetadataKeys,\n  toKey: toMetadataKey\n};\n","var classof = require('./classof-raw');\nvar regexpExec = require('./regexp-exec');\n\n// `RegExpExec` abstract operation\n// https://tc39.github.io/ecma262/#sec-regexpexec\nmodule.exports = function (R, S) {\n  var exec = R.exec;\n  if (typeof exec === 'function') {\n    var result = exec.call(R, S);\n    if (typeof result !== 'object') {\n      throw TypeError('RegExp exec method returned something other than an Object or null');\n    }\n    return result;\n  }\n\n  if (classof(R) !== 'RegExp') {\n    throw TypeError('RegExp#exec called on incompatible receiver');\n  }\n\n  return regexpExec.call(R, S);\n};\n\n","'use strict';\nvar regexpFlags = require('./regexp-flags');\nvar stickyHelpers = require('./regexp-sticky-helpers');\n\nvar nativeExec = RegExp.prototype.exec;\n// This always refers to the native implementation, because the\n// String#replace polyfill uses ./fix-regexp-well-known-symbol-logic.js,\n// which loads this file before patching the method.\nvar nativeReplace = String.prototype.replace;\n\nvar patchedExec = nativeExec;\n\nvar UPDATES_LAST_INDEX_WRONG = (function () {\n  var re1 = /a/;\n  var re2 = /b*/g;\n  nativeExec.call(re1, 'a');\n  nativeExec.call(re2, 'a');\n  return re1.lastIndex !== 0 || re2.lastIndex !== 0;\n})();\n\nvar UNSUPPORTED_Y = stickyHelpers.UNSUPPORTED_Y || stickyHelpers.BROKEN_CARET;\n\n// nonparticipating capturing group, copied from es5-shim's String#split patch.\nvar NPCG_INCLUDED = /()??/.exec('')[1] !== undefined;\n\nvar PATCH = UPDATES_LAST_INDEX_WRONG || NPCG_INCLUDED || UNSUPPORTED_Y;\n\nif (PATCH) {\n  patchedExec = function exec(str) {\n    var re = this;\n    var lastIndex, reCopy, match, i;\n    var sticky = UNSUPPORTED_Y && re.sticky;\n    var flags = regexpFlags.call(re);\n    var source = re.source;\n    var charsAdded = 0;\n    var strCopy = str;\n\n    if (sticky) {\n      flags = flags.replace('y', '');\n      if (flags.indexOf('g') === -1) {\n        flags += 'g';\n      }\n\n      strCopy = String(str).slice(re.lastIndex);\n      // Support anchored sticky behavior.\n      if (re.lastIndex > 0 && (!re.multiline || re.multiline && str[re.lastIndex - 1] !== '\\n')) {\n        source = '(?: ' + source + ')';\n        strCopy = ' ' + strCopy;\n        charsAdded++;\n      }\n      // ^(? + rx + ) is needed, in combination with some str slicing, to\n      // simulate the 'y' flag.\n      reCopy = new RegExp('^(?:' + source + ')', flags);\n    }\n\n    if (NPCG_INCLUDED) {\n      reCopy = new RegExp('^' + source + '$(?!\\\\s)', flags);\n    }\n    if (UPDATES_LAST_INDEX_WRONG) lastIndex = re.lastIndex;\n\n    match = nativeExec.call(sticky ? reCopy : re, strCopy);\n\n    if (sticky) {\n      if (match) {\n        match.input = match.input.slice(charsAdded);\n        match[0] = match[0].slice(charsAdded);\n        match.index = re.lastIndex;\n        re.lastIndex += match[0].length;\n      } else re.lastIndex = 0;\n    } else if (UPDATES_LAST_INDEX_WRONG && match) {\n      re.lastIndex = re.global ? match.index + match[0].length : lastIndex;\n    }\n    if (NPCG_INCLUDED && match && match.length > 1) {\n      // Fix browsers whose `exec` methods don't consistently return `undefined`\n      // for NPCG, like IE8. NOTE: This doesn' work for /(.?)?/\n      nativeReplace.call(match[0], reCopy, function () {\n        for (i = 1; i < arguments.length - 2; i++) {\n          if (arguments[i] === undefined) match[i] = undefined;\n        }\n      });\n    }\n\n    return match;\n  };\n}\n\nmodule.exports = patchedExec;\n","'use strict';\nvar anObject = require('../internals/an-object');\n\n// `RegExp.prototype.flags` getter implementation\n// https://tc39.github.io/ecma262/#sec-get-regexp.prototype.flags\nmodule.exports = function () {\n  var that = anObject(this);\n  var result = '';\n  if (that.global) result += 'g';\n  if (that.ignoreCase) result += 'i';\n  if (that.multiline) result += 'm';\n  if (that.dotAll) result += 's';\n  if (that.unicode) result += 'u';\n  if (that.sticky) result += 'y';\n  return result;\n};\n","'use strict';\n\nvar fails = require('./fails');\n\n// babel-minify transpiles RegExp('a', 'y') -> /a/y and it causes SyntaxError,\n// so we use an intermediate function.\nfunction RE(s, f) {\n  return RegExp(s, f);\n}\n\nexports.UNSUPPORTED_Y = fails(function () {\n  // babel-minify transpiles RegExp('a', 'y') -> /a/y and it causes SyntaxError\n  var re = RE('a', 'y');\n  re.lastIndex = 2;\n  return re.exec('abcd') != null;\n});\n\nexports.BROKEN_CARET = fails(function () {\n  // https://bugzilla.mozilla.org/show_bug.cgi?id=773687\n  var re = RE('^r', 'gy');\n  re.lastIndex = 2;\n  return re.exec('str') != null;\n});\n","// `RequireObjectCoercible` abstract operation\n// https://tc39.github.io/ecma262/#sec-requireobjectcoercible\nmodule.exports = function (it) {\n  if (it == undefined) throw TypeError(\"Can't call method on \" + it);\n  return it;\n};\n","// `SameValueZero` abstract operation\n// https://tc39.github.io/ecma262/#sec-samevaluezero\nmodule.exports = function (x, y) {\n  // eslint-disable-next-line no-self-compare\n  return x === y || x != x && y != y;\n};\n","// `SameValue` abstract operation\n// https://tc39.github.io/ecma262/#sec-samevalue\nmodule.exports = Object.is || function is(x, y) {\n  // eslint-disable-next-line no-self-compare\n  return x === y ? x !== 0 || 1 / x === 1 / y : x != x && y != y;\n};\n","var global = require('../internals/global');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\n\nmodule.exports = function (key, value) {\n  try {\n    createNonEnumerableProperty(global, key, value);\n  } catch (error) {\n    global[key] = value;\n  } return value;\n};\n","'use strict';\nvar getBuiltIn = require('../internals/get-built-in');\nvar definePropertyModule = require('../internals/object-define-property');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar DESCRIPTORS = require('../internals/descriptors');\n\nvar SPECIES = wellKnownSymbol('species');\n\nmodule.exports = function (CONSTRUCTOR_NAME) {\n  var Constructor = getBuiltIn(CONSTRUCTOR_NAME);\n  var defineProperty = definePropertyModule.f;\n\n  if (DESCRIPTORS && Constructor && !Constructor[SPECIES]) {\n    defineProperty(Constructor, SPECIES, {\n      configurable: true,\n      get: function () { return this; }\n    });\n  }\n};\n","var defineProperty = require('../internals/object-define-property').f;\nvar has = require('../internals/has');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar TO_STRING_TAG = wellKnownSymbol('toStringTag');\n\nmodule.exports = function (it, TAG, STATIC) {\n  if (it && !has(it = STATIC ? it : it.prototype, TO_STRING_TAG)) {\n    defineProperty(it, TO_STRING_TAG, { configurable: true, value: TAG });\n  }\n};\n","var shared = require('../internals/shared');\nvar uid = require('../internals/uid');\n\nvar keys = shared('keys');\n\nmodule.exports = function (key) {\n  return keys[key] || (keys[key] = uid(key));\n};\n","var global = require('../internals/global');\nvar setGlobal = require('../internals/set-global');\n\nvar SHARED = '__core-js_shared__';\nvar store = global[SHARED] || setGlobal(SHARED, {});\n\nmodule.exports = store;\n","var IS_PURE = require('../internals/is-pure');\nvar store = require('../internals/shared-store');\n\n(module.exports = function (key, value) {\n  return store[key] || (store[key] = value !== undefined ? value : {});\n})('versions', []).push({\n  version: '3.6.5',\n  mode: IS_PURE ? 'pure' : 'global',\n  copyright: '© 2020 Denis Pushkarev (zloirock.ru)'\n});\n","var anObject = require('../internals/an-object');\nvar aFunction = require('../internals/a-function');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar SPECIES = wellKnownSymbol('species');\n\n// `SpeciesConstructor` abstract operation\n// https://tc39.github.io/ecma262/#sec-speciesconstructor\nmodule.exports = function (O, defaultConstructor) {\n  var C = anObject(O).constructor;\n  var S;\n  return C === undefined || (S = anObject(C)[SPECIES]) == undefined ? defaultConstructor : aFunction(S);\n};\n","var fails = require('../internals/fails');\n\n// check the existence of a method, lowercase\n// of a tag and escaping quotes in arguments\nmodule.exports = function (METHOD_NAME) {\n  return fails(function () {\n    var test = ''[METHOD_NAME]('\"');\n    return test !== test.toLowerCase() || test.split('\"').length > 3;\n  });\n};\n","var toInteger = require('../internals/to-integer');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\n\n// `String.prototype.{ codePointAt, at }` methods implementation\nvar createMethod = function (CONVERT_TO_STRING) {\n  return function ($this, pos) {\n    var S = String(requireObjectCoercible($this));\n    var position = toInteger(pos);\n    var size = S.length;\n    var first, second;\n    if (position < 0 || position >= size) return CONVERT_TO_STRING ? '' : undefined;\n    first = S.charCodeAt(position);\n    return first < 0xD800 || first > 0xDBFF || position + 1 === size\n      || (second = S.charCodeAt(position + 1)) < 0xDC00 || second > 0xDFFF\n        ? CONVERT_TO_STRING ? S.charAt(position) : first\n        : CONVERT_TO_STRING ? S.slice(position, position + 2) : (first - 0xD800 << 10) + (second - 0xDC00) + 0x10000;\n  };\n};\n\nmodule.exports = {\n  // `String.prototype.codePointAt` method\n  // https://tc39.github.io/ecma262/#sec-string.prototype.codepointat\n  codeAt: createMethod(false),\n  // `String.prototype.at` method\n  // https://github.com/mathiasbynens/String.prototype.at\n  charAt: createMethod(true)\n};\n","// https://github.com/zloirock/core-js/issues/280\nvar userAgent = require('../internals/engine-user-agent');\n\n// eslint-disable-next-line unicorn/no-unsafe-regex\nmodule.exports = /Version\\/10\\.\\d+(\\.\\d+)?( Mobile\\/\\w+)? Safari\\//.test(userAgent);\n","// https://github.com/tc39/proposal-string-pad-start-end\nvar toLength = require('../internals/to-length');\nvar repeat = require('../internals/string-repeat');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\n\nvar ceil = Math.ceil;\n\n// `String.prototype.{ padStart, padEnd }` methods implementation\nvar createMethod = function (IS_END) {\n  return function ($this, maxLength, fillString) {\n    var S = String(requireObjectCoercible($this));\n    var stringLength = S.length;\n    var fillStr = fillString === undefined ? ' ' : String(fillString);\n    var intMaxLength = toLength(maxLength);\n    var fillLen, stringFiller;\n    if (intMaxLength <= stringLength || fillStr == '') return S;\n    fillLen = intMaxLength - stringLength;\n    stringFiller = repeat.call(fillStr, ceil(fillLen / fillStr.length));\n    if (stringFiller.length > fillLen) stringFiller = stringFiller.slice(0, fillLen);\n    return IS_END ? S + stringFiller : stringFiller + S;\n  };\n};\n\nmodule.exports = {\n  // `String.prototype.padStart` method\n  // https://tc39.github.io/ecma262/#sec-string.prototype.padstart\n  start: createMethod(false),\n  // `String.prototype.padEnd` method\n  // https://tc39.github.io/ecma262/#sec-string.prototype.padend\n  end: createMethod(true)\n};\n","'use strict';\n// based on https://github.com/bestiejs/punycode.js/blob/master/punycode.js\nvar maxInt = 2147483647; // aka. 0x7FFFFFFF or 2^31-1\nvar base = 36;\nvar tMin = 1;\nvar tMax = 26;\nvar skew = 38;\nvar damp = 700;\nvar initialBias = 72;\nvar initialN = 128; // 0x80\nvar delimiter = '-'; // '\\x2D'\nvar regexNonASCII = /[^\\0-\\u007E]/; // non-ASCII chars\nvar regexSeparators = /[.\\u3002\\uFF0E\\uFF61]/g; // RFC 3490 separators\nvar OVERFLOW_ERROR = 'Overflow: input needs wider integers to process';\nvar baseMinusTMin = base - tMin;\nvar floor = Math.floor;\nvar stringFromCharCode = String.fromCharCode;\n\n/**\n * Creates an array containing the numeric code points of each Unicode\n * character in the string. While JavaScript uses UCS-2 internally,\n * this function will convert a pair of surrogate halves (each of which\n * UCS-2 exposes as separate characters) into a single code point,\n * matching UTF-16.\n */\nvar ucs2decode = function (string) {\n  var output = [];\n  var counter = 0;\n  var length = string.length;\n  while (counter < length) {\n    var value = string.charCodeAt(counter++);\n    if (value >= 0xD800 && value <= 0xDBFF && counter < length) {\n      // It's a high surrogate, and there is a next character.\n      var extra = string.charCodeAt(counter++);\n      if ((extra & 0xFC00) == 0xDC00) { // Low surrogate.\n        output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);\n      } else {\n        // It's an unmatched surrogate; only append this code unit, in case the\n        // next code unit is the high surrogate of a surrogate pair.\n        output.push(value);\n        counter--;\n      }\n    } else {\n      output.push(value);\n    }\n  }\n  return output;\n};\n\n/**\n * Converts a digit/integer into a basic code point.\n */\nvar digitToBasic = function (digit) {\n  //  0..25 map to ASCII a..z or A..Z\n  // 26..35 map to ASCII 0..9\n  return digit + 22 + 75 * (digit < 26);\n};\n\n/**\n * Bias adaptation function as per section 3.4 of RFC 3492.\n * https://tools.ietf.org/html/rfc3492#section-3.4\n */\nvar adapt = function (delta, numPoints, firstTime) {\n  var k = 0;\n  delta = firstTime ? floor(delta / damp) : delta >> 1;\n  delta += floor(delta / numPoints);\n  for (; delta > baseMinusTMin * tMax >> 1; k += base) {\n    delta = floor(delta / baseMinusTMin);\n  }\n  return floor(k + (baseMinusTMin + 1) * delta / (delta + skew));\n};\n\n/**\n * Converts a string of Unicode symbols (e.g. a domain name label) to a\n * Punycode string of ASCII-only symbols.\n */\n// eslint-disable-next-line  max-statements\nvar encode = function (input) {\n  var output = [];\n\n  // Convert the input in UCS-2 to an array of Unicode code points.\n  input = ucs2decode(input);\n\n  // Cache the length.\n  var inputLength = input.length;\n\n  // Initialize the state.\n  var n = initialN;\n  var delta = 0;\n  var bias = initialBias;\n  var i, currentValue;\n\n  // Handle the basic code points.\n  for (i = 0; i < input.length; i++) {\n    currentValue = input[i];\n    if (currentValue < 0x80) {\n      output.push(stringFromCharCode(currentValue));\n    }\n  }\n\n  var basicLength = output.length; // number of basic code points.\n  var handledCPCount = basicLength; // number of code points that have been handled;\n\n  // Finish the basic string with a delimiter unless it's empty.\n  if (basicLength) {\n    output.push(delimiter);\n  }\n\n  // Main encoding loop:\n  while (handledCPCount < inputLength) {\n    // All non-basic code points < n have been handled already. Find the next larger one:\n    var m = maxInt;\n    for (i = 0; i < input.length; i++) {\n      currentValue = input[i];\n      if (currentValue >= n && currentValue < m) {\n        m = currentValue;\n      }\n    }\n\n    // Increase `delta` enough to advance the decoder's <n,i> state to <m,0>, but guard against overflow.\n    var handledCPCountPlusOne = handledCPCount + 1;\n    if (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {\n      throw RangeError(OVERFLOW_ERROR);\n    }\n\n    delta += (m - n) * handledCPCountPlusOne;\n    n = m;\n\n    for (i = 0; i < input.length; i++) {\n      currentValue = input[i];\n      if (currentValue < n && ++delta > maxInt) {\n        throw RangeError(OVERFLOW_ERROR);\n      }\n      if (currentValue == n) {\n        // Represent delta as a generalized variable-length integer.\n        var q = delta;\n        for (var k = base; /* no condition */; k += base) {\n          var t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);\n          if (q < t) break;\n          var qMinusT = q - t;\n          var baseMinusT = base - t;\n          output.push(stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT)));\n          q = floor(qMinusT / baseMinusT);\n        }\n\n        output.push(stringFromCharCode(digitToBasic(q)));\n        bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);\n        delta = 0;\n        ++handledCPCount;\n      }\n    }\n\n    ++delta;\n    ++n;\n  }\n  return output.join('');\n};\n\nmodule.exports = function (input) {\n  var encoded = [];\n  var labels = input.toLowerCase().replace(regexSeparators, '\\u002E').split('.');\n  var i, label;\n  for (i = 0; i < labels.length; i++) {\n    label = labels[i];\n    encoded.push(regexNonASCII.test(label) ? 'xn--' + encode(label) : label);\n  }\n  return encoded.join('.');\n};\n","'use strict';\nvar toInteger = require('../internals/to-integer');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\n\n// `String.prototype.repeat` method implementation\n// https://tc39.github.io/ecma262/#sec-string.prototype.repeat\nmodule.exports = ''.repeat || function repeat(count) {\n  var str = String(requireObjectCoercible(this));\n  var result = '';\n  var n = toInteger(count);\n  if (n < 0 || n == Infinity) throw RangeError('Wrong number of repetitions');\n  for (;n > 0; (n >>>= 1) && (str += str)) if (n & 1) result += str;\n  return result;\n};\n","var fails = require('../internals/fails');\nvar whitespaces = require('../internals/whitespaces');\n\nvar non = '\\u200B\\u0085\\u180E';\n\n// check that a method works with the correct list\n// of whitespaces and has a correct name\nmodule.exports = function (METHOD_NAME) {\n  return fails(function () {\n    return !!whitespaces[METHOD_NAME]() || non[METHOD_NAME]() != non || whitespaces[METHOD_NAME].name !== METHOD_NAME;\n  });\n};\n","var requireObjectCoercible = require('../internals/require-object-coercible');\nvar whitespaces = require('../internals/whitespaces');\n\nvar whitespace = '[' + whitespaces + ']';\nvar ltrim = RegExp('^' + whitespace + whitespace + '*');\nvar rtrim = RegExp(whitespace + whitespace + '*$');\n\n// `String.prototype.{ trim, trimStart, trimEnd, trimLeft, trimRight }` methods implementation\nvar createMethod = function (TYPE) {\n  return function ($this) {\n    var string = String(requireObjectCoercible($this));\n    if (TYPE & 1) string = string.replace(ltrim, '');\n    if (TYPE & 2) string = string.replace(rtrim, '');\n    return string;\n  };\n};\n\nmodule.exports = {\n  // `String.prototype.{ trimLeft, trimStart }` methods\n  // https://tc39.github.io/ecma262/#sec-string.prototype.trimstart\n  start: createMethod(1),\n  // `String.prototype.{ trimRight, trimEnd }` methods\n  // https://tc39.github.io/ecma262/#sec-string.prototype.trimend\n  end: createMethod(2),\n  // `String.prototype.trim` method\n  // https://tc39.github.io/ecma262/#sec-string.prototype.trim\n  trim: createMethod(3)\n};\n","var global = require('../internals/global');\nvar fails = require('../internals/fails');\nvar classof = require('../internals/classof-raw');\nvar bind = require('../internals/function-bind-context');\nvar html = require('../internals/html');\nvar createElement = require('../internals/document-create-element');\nvar IS_IOS = require('../internals/engine-is-ios');\n\nvar location = global.location;\nvar set = global.setImmediate;\nvar clear = global.clearImmediate;\nvar process = global.process;\nvar MessageChannel = global.MessageChannel;\nvar Dispatch = global.Dispatch;\nvar counter = 0;\nvar queue = {};\nvar ONREADYSTATECHANGE = 'onreadystatechange';\nvar defer, channel, port;\n\nvar run = function (id) {\n  // eslint-disable-next-line no-prototype-builtins\n  if (queue.hasOwnProperty(id)) {\n    var fn = queue[id];\n    delete queue[id];\n    fn();\n  }\n};\n\nvar runner = function (id) {\n  return function () {\n    run(id);\n  };\n};\n\nvar listener = function (event) {\n  run(event.data);\n};\n\nvar post = function (id) {\n  // old engines have not location.origin\n  global.postMessage(id + '', location.protocol + '//' + location.host);\n};\n\n// Node.js 0.9+ & IE10+ has setImmediate, otherwise:\nif (!set || !clear) {\n  set = function setImmediate(fn) {\n    var args = [];\n    var i = 1;\n    while (arguments.length > i) args.push(arguments[i++]);\n    queue[++counter] = function () {\n      // eslint-disable-next-line no-new-func\n      (typeof fn == 'function' ? fn : Function(fn)).apply(undefined, args);\n    };\n    defer(counter);\n    return counter;\n  };\n  clear = function clearImmediate(id) {\n    delete queue[id];\n  };\n  // Node.js 0.8-\n  if (classof(process) == 'process') {\n    defer = function (id) {\n      process.nextTick(runner(id));\n    };\n  // Sphere (JS game engine) Dispatch API\n  } else if (Dispatch && Dispatch.now) {\n    defer = function (id) {\n      Dispatch.now(runner(id));\n    };\n  // Browsers with MessageChannel, includes WebWorkers\n  // except iOS - https://github.com/zloirock/core-js/issues/624\n  } else if (MessageChannel && !IS_IOS) {\n    channel = new MessageChannel();\n    port = channel.port2;\n    channel.port1.onmessage = listener;\n    defer = bind(port.postMessage, port, 1);\n  // Browsers with postMessage, skip WebWorkers\n  // IE8 has postMessage, but it's sync & typeof its postMessage is 'object'\n  } else if (\n    global.addEventListener &&\n    typeof postMessage == 'function' &&\n    !global.importScripts &&\n    !fails(post) &&\n    location.protocol !== 'file:'\n  ) {\n    defer = post;\n    global.addEventListener('message', listener, false);\n  // IE8-\n  } else if (ONREADYSTATECHANGE in createElement('script')) {\n    defer = function (id) {\n      html.appendChild(createElement('script'))[ONREADYSTATECHANGE] = function () {\n        html.removeChild(this);\n        run(id);\n      };\n    };\n  // Rest old browsers\n  } else {\n    defer = function (id) {\n      setTimeout(runner(id), 0);\n    };\n  }\n}\n\nmodule.exports = {\n  set: set,\n  clear: clear\n};\n","var classof = require('../internals/classof-raw');\n\n// `thisNumberValue` abstract operation\n// https://tc39.github.io/ecma262/#sec-thisnumbervalue\nmodule.exports = function (value) {\n  if (typeof value != 'number' && classof(value) != 'Number') {\n    throw TypeError('Incorrect invocation');\n  }\n  return +value;\n};\n","var toInteger = require('../internals/to-integer');\n\nvar max = Math.max;\nvar min = Math.min;\n\n// Helper for a popular repeating case of the spec:\n// Let integer be ? ToInteger(index).\n// If integer < 0, let result be max((length + integer), 0); else let result be min(integer, length).\nmodule.exports = function (index, length) {\n  var integer = toInteger(index);\n  return integer < 0 ? max(integer + length, 0) : min(integer, length);\n};\n","var toInteger = require('../internals/to-integer');\nvar toLength = require('../internals/to-length');\n\n// `ToIndex` abstract operation\n// https://tc39.github.io/ecma262/#sec-toindex\nmodule.exports = function (it) {\n  if (it === undefined) return 0;\n  var number = toInteger(it);\n  var length = toLength(number);\n  if (number !== length) throw RangeError('Wrong length or index');\n  return length;\n};\n","// toObject with fallback for non-array-like ES3 strings\nvar IndexedObject = require('../internals/indexed-object');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\n\nmodule.exports = function (it) {\n  return IndexedObject(requireObjectCoercible(it));\n};\n","var ceil = Math.ceil;\nvar floor = Math.floor;\n\n// `ToInteger` abstract operation\n// https://tc39.github.io/ecma262/#sec-tointeger\nmodule.exports = function (argument) {\n  return isNaN(argument = +argument) ? 0 : (argument > 0 ? floor : ceil)(argument);\n};\n","var toInteger = require('../internals/to-integer');\n\nvar min = Math.min;\n\n// `ToLength` abstract operation\n// https://tc39.github.io/ecma262/#sec-tolength\nmodule.exports = function (argument) {\n  return argument > 0 ? min(toInteger(argument), 0x1FFFFFFFFFFFFF) : 0; // 2 ** 53 - 1 == 9007199254740991\n};\n","var requireObjectCoercible = require('../internals/require-object-coercible');\n\n// `ToObject` abstract operation\n// https://tc39.github.io/ecma262/#sec-toobject\nmodule.exports = function (argument) {\n  return Object(requireObjectCoercible(argument));\n};\n","var toPositiveInteger = require('../internals/to-positive-integer');\n\nmodule.exports = function (it, BYTES) {\n  var offset = toPositiveInteger(it);\n  if (offset % BYTES) throw RangeError('Wrong offset');\n  return offset;\n};\n","var toInteger = require('../internals/to-integer');\n\nmodule.exports = function (it) {\n  var result = toInteger(it);\n  if (result < 0) throw RangeError(\"The argument can't be less than 0\");\n  return result;\n};\n","var isObject = require('../internals/is-object');\n\n// `ToPrimitive` abstract operation\n// https://tc39.github.io/ecma262/#sec-toprimitive\n// instead of the ES6 spec version, we didn't implement @@toPrimitive case\n// and the second argument - flag - preferred type is a string\nmodule.exports = function (input, PREFERRED_STRING) {\n  if (!isObject(input)) return input;\n  var fn, val;\n  if (PREFERRED_STRING && typeof (fn = input.toString) == 'function' && !isObject(val = fn.call(input))) return val;\n  if (typeof (fn = input.valueOf) == 'function' && !isObject(val = fn.call(input))) return val;\n  if (!PREFERRED_STRING && typeof (fn = input.toString) == 'function' && !isObject(val = fn.call(input))) return val;\n  throw TypeError(\"Can't convert object to primitive value\");\n};\n","var wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar TO_STRING_TAG = wellKnownSymbol('toStringTag');\nvar test = {};\n\ntest[TO_STRING_TAG] = 'z';\n\nmodule.exports = String(test) === '[object z]';\n","'use strict';\nvar $ = require('../internals/export');\nvar global = require('../internals/global');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS = require('../internals/typed-array-constructors-require-wrappers');\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar ArrayBufferModule = require('../internals/array-buffer');\nvar anInstance = require('../internals/an-instance');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar toLength = require('../internals/to-length');\nvar toIndex = require('../internals/to-index');\nvar toOffset = require('../internals/to-offset');\nvar toPrimitive = require('../internals/to-primitive');\nvar has = require('../internals/has');\nvar classof = require('../internals/classof');\nvar isObject = require('../internals/is-object');\nvar create = require('../internals/object-create');\nvar setPrototypeOf = require('../internals/object-set-prototype-of');\nvar getOwnPropertyNames = require('../internals/object-get-own-property-names').f;\nvar typedArrayFrom = require('../internals/typed-array-from');\nvar forEach = require('../internals/array-iteration').forEach;\nvar setSpecies = require('../internals/set-species');\nvar definePropertyModule = require('../internals/object-define-property');\nvar getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');\nvar InternalStateModule = require('../internals/internal-state');\nvar inheritIfRequired = require('../internals/inherit-if-required');\n\nvar getInternalState = InternalStateModule.get;\nvar setInternalState = InternalStateModule.set;\nvar nativeDefineProperty = definePropertyModule.f;\nvar nativeGetOwnPropertyDescriptor = getOwnPropertyDescriptorModule.f;\nvar round = Math.round;\nvar RangeError = global.RangeError;\nvar ArrayBuffer = ArrayBufferModule.ArrayBuffer;\nvar DataView = ArrayBufferModule.DataView;\nvar NATIVE_ARRAY_BUFFER_VIEWS = ArrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;\nvar TYPED_ARRAY_TAG = ArrayBufferViewCore.TYPED_ARRAY_TAG;\nvar TypedArray = ArrayBufferViewCore.TypedArray;\nvar TypedArrayPrototype = ArrayBufferViewCore.TypedArrayPrototype;\nvar aTypedArrayConstructor = ArrayBufferViewCore.aTypedArrayConstructor;\nvar isTypedArray = ArrayBufferViewCore.isTypedArray;\nvar BYTES_PER_ELEMENT = 'BYTES_PER_ELEMENT';\nvar WRONG_LENGTH = 'Wrong length';\n\nvar fromList = function (C, list) {\n  var index = 0;\n  var length = list.length;\n  var result = new (aTypedArrayConstructor(C))(length);\n  while (length > index) result[index] = list[index++];\n  return result;\n};\n\nvar addGetter = function (it, key) {\n  nativeDefineProperty(it, key, { get: function () {\n    return getInternalState(this)[key];\n  } });\n};\n\nvar isArrayBuffer = function (it) {\n  var klass;\n  return it instanceof ArrayBuffer || (klass = classof(it)) == 'ArrayBuffer' || klass == 'SharedArrayBuffer';\n};\n\nvar isTypedArrayIndex = function (target, key) {\n  return isTypedArray(target)\n    && typeof key != 'symbol'\n    && key in target\n    && String(+key) == String(key);\n};\n\nvar wrappedGetOwnPropertyDescriptor = function getOwnPropertyDescriptor(target, key) {\n  return isTypedArrayIndex(target, key = toPrimitive(key, true))\n    ? createPropertyDescriptor(2, target[key])\n    : nativeGetOwnPropertyDescriptor(target, key);\n};\n\nvar wrappedDefineProperty = function defineProperty(target, key, descriptor) {\n  if (isTypedArrayIndex(target, key = toPrimitive(key, true))\n    && isObject(descriptor)\n    && has(descriptor, 'value')\n    && !has(descriptor, 'get')\n    && !has(descriptor, 'set')\n    // TODO: add validation descriptor w/o calling accessors\n    && !descriptor.configurable\n    && (!has(descriptor, 'writable') || descriptor.writable)\n    && (!has(descriptor, 'enumerable') || descriptor.enumerable)\n  ) {\n    target[key] = descriptor.value;\n    return target;\n  } return nativeDefineProperty(target, key, descriptor);\n};\n\nif (DESCRIPTORS) {\n  if (!NATIVE_ARRAY_BUFFER_VIEWS) {\n    getOwnPropertyDescriptorModule.f = wrappedGetOwnPropertyDescriptor;\n    definePropertyModule.f = wrappedDefineProperty;\n    addGetter(TypedArrayPrototype, 'buffer');\n    addGetter(TypedArrayPrototype, 'byteOffset');\n    addGetter(TypedArrayPrototype, 'byteLength');\n    addGetter(TypedArrayPrototype, 'length');\n  }\n\n  $({ target: 'Object', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS }, {\n    getOwnPropertyDescriptor: wrappedGetOwnPropertyDescriptor,\n    defineProperty: wrappedDefineProperty\n  });\n\n  module.exports = function (TYPE, wrapper, CLAMPED) {\n    var BYTES = TYPE.match(/\\d+$/)[0] / 8;\n    var CONSTRUCTOR_NAME = TYPE + (CLAMPED ? 'Clamped' : '') + 'Array';\n    var GETTER = 'get' + TYPE;\n    var SETTER = 'set' + TYPE;\n    var NativeTypedArrayConstructor = global[CONSTRUCTOR_NAME];\n    var TypedArrayConstructor = NativeTypedArrayConstructor;\n    var TypedArrayConstructorPrototype = TypedArrayConstructor && TypedArrayConstructor.prototype;\n    var exported = {};\n\n    var getter = function (that, index) {\n      var data = getInternalState(that);\n      return data.view[GETTER](index * BYTES + data.byteOffset, true);\n    };\n\n    var setter = function (that, index, value) {\n      var data = getInternalState(that);\n      if (CLAMPED) value = (value = round(value)) < 0 ? 0 : value > 0xFF ? 0xFF : value & 0xFF;\n      data.view[SETTER](index * BYTES + data.byteOffset, value, true);\n    };\n\n    var addElement = function (that, index) {\n      nativeDefineProperty(that, index, {\n        get: function () {\n          return getter(this, index);\n        },\n        set: function (value) {\n          return setter(this, index, value);\n        },\n        enumerable: true\n      });\n    };\n\n    if (!NATIVE_ARRAY_BUFFER_VIEWS) {\n      TypedArrayConstructor = wrapper(function (that, data, offset, $length) {\n        anInstance(that, TypedArrayConstructor, CONSTRUCTOR_NAME);\n        var index = 0;\n        var byteOffset = 0;\n        var buffer, byteLength, length;\n        if (!isObject(data)) {\n          length = toIndex(data);\n          byteLength = length * BYTES;\n          buffer = new ArrayBuffer(byteLength);\n        } else if (isArrayBuffer(data)) {\n          buffer = data;\n          byteOffset = toOffset(offset, BYTES);\n          var $len = data.byteLength;\n          if ($length === undefined) {\n            if ($len % BYTES) throw RangeError(WRONG_LENGTH);\n            byteLength = $len - byteOffset;\n            if (byteLength < 0) throw RangeError(WRONG_LENGTH);\n          } else {\n            byteLength = toLength($length) * BYTES;\n            if (byteLength + byteOffset > $len) throw RangeError(WRONG_LENGTH);\n          }\n          length = byteLength / BYTES;\n        } else if (isTypedArray(data)) {\n          return fromList(TypedArrayConstructor, data);\n        } else {\n          return typedArrayFrom.call(TypedArrayConstructor, data);\n        }\n        setInternalState(that, {\n          buffer: buffer,\n          byteOffset: byteOffset,\n          byteLength: byteLength,\n          length: length,\n          view: new DataView(buffer)\n        });\n        while (index < length) addElement(that, index++);\n      });\n\n      if (setPrototypeOf) setPrototypeOf(TypedArrayConstructor, TypedArray);\n      TypedArrayConstructorPrototype = TypedArrayConstructor.prototype = create(TypedArrayPrototype);\n    } else if (TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS) {\n      TypedArrayConstructor = wrapper(function (dummy, data, typedArrayOffset, $length) {\n        anInstance(dummy, TypedArrayConstructor, CONSTRUCTOR_NAME);\n        return inheritIfRequired(function () {\n          if (!isObject(data)) return new NativeTypedArrayConstructor(toIndex(data));\n          if (isArrayBuffer(data)) return $length !== undefined\n            ? new NativeTypedArrayConstructor(data, toOffset(typedArrayOffset, BYTES), $length)\n            : typedArrayOffset !== undefined\n              ? new NativeTypedArrayConstructor(data, toOffset(typedArrayOffset, BYTES))\n              : new NativeTypedArrayConstructor(data);\n          if (isTypedArray(data)) return fromList(TypedArrayConstructor, data);\n          return typedArrayFrom.call(TypedArrayConstructor, data);\n        }(), dummy, TypedArrayConstructor);\n      });\n\n      if (setPrototypeOf) setPrototypeOf(TypedArrayConstructor, TypedArray);\n      forEach(getOwnPropertyNames(NativeTypedArrayConstructor), function (key) {\n        if (!(key in TypedArrayConstructor)) {\n          createNonEnumerableProperty(TypedArrayConstructor, key, NativeTypedArrayConstructor[key]);\n        }\n      });\n      TypedArrayConstructor.prototype = TypedArrayConstructorPrototype;\n    }\n\n    if (TypedArrayConstructorPrototype.constructor !== TypedArrayConstructor) {\n      createNonEnumerableProperty(TypedArrayConstructorPrototype, 'constructor', TypedArrayConstructor);\n    }\n\n    if (TYPED_ARRAY_TAG) {\n      createNonEnumerableProperty(TypedArrayConstructorPrototype, TYPED_ARRAY_TAG, CONSTRUCTOR_NAME);\n    }\n\n    exported[CONSTRUCTOR_NAME] = TypedArrayConstructor;\n\n    $({\n      global: true, forced: TypedArrayConstructor != NativeTypedArrayConstructor, sham: !NATIVE_ARRAY_BUFFER_VIEWS\n    }, exported);\n\n    if (!(BYTES_PER_ELEMENT in TypedArrayConstructor)) {\n      createNonEnumerableProperty(TypedArrayConstructor, BYTES_PER_ELEMENT, BYTES);\n    }\n\n    if (!(BYTES_PER_ELEMENT in TypedArrayConstructorPrototype)) {\n      createNonEnumerableProperty(TypedArrayConstructorPrototype, BYTES_PER_ELEMENT, BYTES);\n    }\n\n    setSpecies(CONSTRUCTOR_NAME);\n  };\n} else module.exports = function () { /* empty */ };\n","/* eslint-disable no-new */\nvar global = require('../internals/global');\nvar fails = require('../internals/fails');\nvar checkCorrectnessOfIteration = require('../internals/check-correctness-of-iteration');\nvar NATIVE_ARRAY_BUFFER_VIEWS = require('../internals/array-buffer-view-core').NATIVE_ARRAY_BUFFER_VIEWS;\n\nvar ArrayBuffer = global.ArrayBuffer;\nvar Int8Array = global.Int8Array;\n\nmodule.exports = !NATIVE_ARRAY_BUFFER_VIEWS || !fails(function () {\n  Int8Array(1);\n}) || !fails(function () {\n  new Int8Array(-1);\n}) || !checkCorrectnessOfIteration(function (iterable) {\n  new Int8Array();\n  new Int8Array(null);\n  new Int8Array(1.5);\n  new Int8Array(iterable);\n}, true) || fails(function () {\n  // Safari (11+) bug - a reason why even Safari 13 should load a typed array polyfill\n  return new Int8Array(new ArrayBuffer(2), 1, undefined).length !== 1;\n});\n","var toObject = require('../internals/to-object');\nvar toLength = require('../internals/to-length');\nvar getIteratorMethod = require('../internals/get-iterator-method');\nvar isArrayIteratorMethod = require('../internals/is-array-iterator-method');\nvar bind = require('../internals/function-bind-context');\nvar aTypedArrayConstructor = require('../internals/array-buffer-view-core').aTypedArrayConstructor;\n\nmodule.exports = function from(source /* , mapfn, thisArg */) {\n  var O = toObject(source);\n  var argumentsLength = arguments.length;\n  var mapfn = argumentsLength > 1 ? arguments[1] : undefined;\n  var mapping = mapfn !== undefined;\n  var iteratorMethod = getIteratorMethod(O);\n  var i, length, result, step, iterator, next;\n  if (iteratorMethod != undefined && !isArrayIteratorMethod(iteratorMethod)) {\n    iterator = iteratorMethod.call(O);\n    next = iterator.next;\n    O = [];\n    while (!(step = next.call(iterator)).done) {\n      O.push(step.value);\n    }\n  }\n  if (mapping && argumentsLength > 2) {\n    mapfn = bind(mapfn, arguments[2], 2);\n  }\n  length = toLength(O.length);\n  result = new (aTypedArrayConstructor(this))(length);\n  for (i = 0; length > i; i++) {\n    result[i] = mapping ? mapfn(O[i], i) : O[i];\n  }\n  return result;\n};\n","var id = 0;\nvar postfix = Math.random();\n\nmodule.exports = function (key) {\n  return 'Symbol(' + String(key === undefined ? '' : key) + ')_' + (++id + postfix).toString(36);\n};\n","var NATIVE_SYMBOL = require('../internals/native-symbol');\n\nmodule.exports = NATIVE_SYMBOL\n  // eslint-disable-next-line no-undef\n  && !Symbol.sham\n  // eslint-disable-next-line no-undef\n  && typeof Symbol.iterator == 'symbol';\n","var wellKnownSymbol = require('../internals/well-known-symbol');\n\nexports.f = wellKnownSymbol;\n","var global = require('../internals/global');\nvar shared = require('../internals/shared');\nvar has = require('../internals/has');\nvar uid = require('../internals/uid');\nvar NATIVE_SYMBOL = require('../internals/native-symbol');\nvar USE_SYMBOL_AS_UID = require('../internals/use-symbol-as-uid');\n\nvar WellKnownSymbolsStore = shared('wks');\nvar Symbol = global.Symbol;\nvar createWellKnownSymbol = USE_SYMBOL_AS_UID ? Symbol : Symbol && Symbol.withoutSetter || uid;\n\nmodule.exports = function (name) {\n  if (!has(WellKnownSymbolsStore, name)) {\n    if (NATIVE_SYMBOL && has(Symbol, name)) WellKnownSymbolsStore[name] = Symbol[name];\n    else WellKnownSymbolsStore[name] = createWellKnownSymbol('Symbol.' + name);\n  } return WellKnownSymbolsStore[name];\n};\n","// a string of all valid unicode whitespaces\n// eslint-disable-next-line max-len\nmodule.exports = '\\u0009\\u000A\\u000B\\u000C\\u000D\\u0020\\u00A0\\u1680\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200A\\u202F\\u205F\\u3000\\u2028\\u2029\\uFEFF';\n","'use strict';\nvar $ = require('../internals/export');\nvar global = require('../internals/global');\nvar arrayBufferModule = require('../internals/array-buffer');\nvar setSpecies = require('../internals/set-species');\n\nvar ARRAY_BUFFER = 'ArrayBuffer';\nvar ArrayBuffer = arrayBufferModule[ARRAY_BUFFER];\nvar NativeArrayBuffer = global[ARRAY_BUFFER];\n\n// `ArrayBuffer` constructor\n// https://tc39.github.io/ecma262/#sec-arraybuffer-constructor\n$({ global: true, forced: NativeArrayBuffer !== ArrayBuffer }, {\n  ArrayBuffer: ArrayBuffer\n});\n\nsetSpecies(ARRAY_BUFFER);\n","'use strict';\nvar $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar isArray = require('../internals/is-array');\nvar isObject = require('../internals/is-object');\nvar toObject = require('../internals/to-object');\nvar toLength = require('../internals/to-length');\nvar createProperty = require('../internals/create-property');\nvar arraySpeciesCreate = require('../internals/array-species-create');\nvar arrayMethodHasSpeciesSupport = require('../internals/array-method-has-species-support');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar V8_VERSION = require('../internals/engine-v8-version');\n\nvar IS_CONCAT_SPREADABLE = wellKnownSymbol('isConcatSpreadable');\nvar MAX_SAFE_INTEGER = 0x1FFFFFFFFFFFFF;\nvar MAXIMUM_ALLOWED_INDEX_EXCEEDED = 'Maximum allowed index exceeded';\n\n// We can't use this feature detection in V8 since it causes\n// deoptimization and serious performance degradation\n// https://github.com/zloirock/core-js/issues/679\nvar IS_CONCAT_SPREADABLE_SUPPORT = V8_VERSION >= 51 || !fails(function () {\n  var array = [];\n  array[IS_CONCAT_SPREADABLE] = false;\n  return array.concat()[0] !== array;\n});\n\nvar SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('concat');\n\nvar isConcatSpreadable = function (O) {\n  if (!isObject(O)) return false;\n  var spreadable = O[IS_CONCAT_SPREADABLE];\n  return spreadable !== undefined ? !!spreadable : isArray(O);\n};\n\nvar FORCED = !IS_CONCAT_SPREADABLE_SUPPORT || !SPECIES_SUPPORT;\n\n// `Array.prototype.concat` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.concat\n// with adding support of @@isConcatSpreadable and @@species\n$({ target: 'Array', proto: true, forced: FORCED }, {\n  concat: function concat(arg) { // eslint-disable-line no-unused-vars\n    var O = toObject(this);\n    var A = arraySpeciesCreate(O, 0);\n    var n = 0;\n    var i, k, length, len, E;\n    for (i = -1, length = arguments.length; i < length; i++) {\n      E = i === -1 ? O : arguments[i];\n      if (isConcatSpreadable(E)) {\n        len = toLength(E.length);\n        if (n + len > MAX_SAFE_INTEGER) throw TypeError(MAXIMUM_ALLOWED_INDEX_EXCEEDED);\n        for (k = 0; k < len; k++, n++) if (k in E) createProperty(A, n, E[k]);\n      } else {\n        if (n >= MAX_SAFE_INTEGER) throw TypeError(MAXIMUM_ALLOWED_INDEX_EXCEEDED);\n        createProperty(A, n++, E);\n      }\n    }\n    A.length = n;\n    return A;\n  }\n});\n","var $ = require('../internals/export');\nvar copyWithin = require('../internals/array-copy-within');\nvar addToUnscopables = require('../internals/add-to-unscopables');\n\n// `Array.prototype.copyWithin` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.copywithin\n$({ target: 'Array', proto: true }, {\n  copyWithin: copyWithin\n});\n\n// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables\naddToUnscopables('copyWithin');\n","'use strict';\nvar $ = require('../internals/export');\nvar $every = require('../internals/array-iteration').every;\nvar arrayMethodIsStrict = require('../internals/array-method-is-strict');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar STRICT_METHOD = arrayMethodIsStrict('every');\nvar USES_TO_LENGTH = arrayMethodUsesToLength('every');\n\n// `Array.prototype.every` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.every\n$({ target: 'Array', proto: true, forced: !STRICT_METHOD || !USES_TO_LENGTH }, {\n  every: function every(callbackfn /* , thisArg */) {\n    return $every(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n","var $ = require('../internals/export');\nvar fill = require('../internals/array-fill');\nvar addToUnscopables = require('../internals/add-to-unscopables');\n\n// `Array.prototype.fill` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.fill\n$({ target: 'Array', proto: true }, {\n  fill: fill\n});\n\n// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables\naddToUnscopables('fill');\n","'use strict';\nvar $ = require('../internals/export');\nvar $filter = require('../internals/array-iteration').filter;\nvar arrayMethodHasSpeciesSupport = require('../internals/array-method-has-species-support');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('filter');\n// Edge 14- issue\nvar USES_TO_LENGTH = arrayMethodUsesToLength('filter');\n\n// `Array.prototype.filter` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.filter\n// with adding support of @@species\n$({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT || !USES_TO_LENGTH }, {\n  filter: function filter(callbackfn /* , thisArg */) {\n    return $filter(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $findIndex = require('../internals/array-iteration').findIndex;\nvar addToUnscopables = require('../internals/add-to-unscopables');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar FIND_INDEX = 'findIndex';\nvar SKIPS_HOLES = true;\n\nvar USES_TO_LENGTH = arrayMethodUsesToLength(FIND_INDEX);\n\n// Shouldn't skip holes\nif (FIND_INDEX in []) Array(1)[FIND_INDEX](function () { SKIPS_HOLES = false; });\n\n// `Array.prototype.findIndex` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.findindex\n$({ target: 'Array', proto: true, forced: SKIPS_HOLES || !USES_TO_LENGTH }, {\n  findIndex: function findIndex(callbackfn /* , that = undefined */) {\n    return $findIndex(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n\n// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables\naddToUnscopables(FIND_INDEX);\n","'use strict';\nvar $ = require('../internals/export');\nvar $find = require('../internals/array-iteration').find;\nvar addToUnscopables = require('../internals/add-to-unscopables');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar FIND = 'find';\nvar SKIPS_HOLES = true;\n\nvar USES_TO_LENGTH = arrayMethodUsesToLength(FIND);\n\n// Shouldn't skip holes\nif (FIND in []) Array(1)[FIND](function () { SKIPS_HOLES = false; });\n\n// `Array.prototype.find` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.find\n$({ target: 'Array', proto: true, forced: SKIPS_HOLES || !USES_TO_LENGTH }, {\n  find: function find(callbackfn /* , that = undefined */) {\n    return $find(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n\n// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables\naddToUnscopables(FIND);\n","'use strict';\nvar $ = require('../internals/export');\nvar flattenIntoArray = require('../internals/flatten-into-array');\nvar toObject = require('../internals/to-object');\nvar toLength = require('../internals/to-length');\nvar aFunction = require('../internals/a-function');\nvar arraySpeciesCreate = require('../internals/array-species-create');\n\n// `Array.prototype.flatMap` method\n// https://github.com/tc39/proposal-flatMap\n$({ target: 'Array', proto: true }, {\n  flatMap: function flatMap(callbackfn /* , thisArg */) {\n    var O = toObject(this);\n    var sourceLen = toLength(O.length);\n    var A;\n    aFunction(callbackfn);\n    A = arraySpeciesCreate(O, 0);\n    A.length = flattenIntoArray(A, O, O, sourceLen, 0, 1, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n    return A;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar flattenIntoArray = require('../internals/flatten-into-array');\nvar toObject = require('../internals/to-object');\nvar toLength = require('../internals/to-length');\nvar toInteger = require('../internals/to-integer');\nvar arraySpeciesCreate = require('../internals/array-species-create');\n\n// `Array.prototype.flat` method\n// https://github.com/tc39/proposal-flatMap\n$({ target: 'Array', proto: true }, {\n  flat: function flat(/* depthArg = 1 */) {\n    var depthArg = arguments.length ? arguments[0] : undefined;\n    var O = toObject(this);\n    var sourceLen = toLength(O.length);\n    var A = arraySpeciesCreate(O, 0);\n    A.length = flattenIntoArray(A, O, O, sourceLen, 0, depthArg === undefined ? 1 : toInteger(depthArg));\n    return A;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar forEach = require('../internals/array-for-each');\n\n// `Array.prototype.forEach` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.foreach\n$({ target: 'Array', proto: true, forced: [].forEach != forEach }, {\n  forEach: forEach\n});\n","var $ = require('../internals/export');\nvar from = require('../internals/array-from');\nvar checkCorrectnessOfIteration = require('../internals/check-correctness-of-iteration');\n\nvar INCORRECT_ITERATION = !checkCorrectnessOfIteration(function (iterable) {\n  Array.from(iterable);\n});\n\n// `Array.from` method\n// https://tc39.github.io/ecma262/#sec-array.from\n$({ target: 'Array', stat: true, forced: INCORRECT_ITERATION }, {\n  from: from\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $includes = require('../internals/array-includes').includes;\nvar addToUnscopables = require('../internals/add-to-unscopables');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar USES_TO_LENGTH = arrayMethodUsesToLength('indexOf', { ACCESSORS: true, 1: 0 });\n\n// `Array.prototype.includes` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.includes\n$({ target: 'Array', proto: true, forced: !USES_TO_LENGTH }, {\n  includes: function includes(el /* , fromIndex = 0 */) {\n    return $includes(this, el, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n\n// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables\naddToUnscopables('includes');\n","'use strict';\nvar $ = require('../internals/export');\nvar $indexOf = require('../internals/array-includes').indexOf;\nvar arrayMethodIsStrict = require('../internals/array-method-is-strict');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar nativeIndexOf = [].indexOf;\n\nvar NEGATIVE_ZERO = !!nativeIndexOf && 1 / [1].indexOf(1, -0) < 0;\nvar STRICT_METHOD = arrayMethodIsStrict('indexOf');\nvar USES_TO_LENGTH = arrayMethodUsesToLength('indexOf', { ACCESSORS: true, 1: 0 });\n\n// `Array.prototype.indexOf` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.indexof\n$({ target: 'Array', proto: true, forced: NEGATIVE_ZERO || !STRICT_METHOD || !USES_TO_LENGTH }, {\n  indexOf: function indexOf(searchElement /* , fromIndex = 0 */) {\n    return NEGATIVE_ZERO\n      // convert -0 to +0\n      ? nativeIndexOf.apply(this, arguments) || 0\n      : $indexOf(this, searchElement, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n","'use strict';\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar addToUnscopables = require('../internals/add-to-unscopables');\nvar Iterators = require('../internals/iterators');\nvar InternalStateModule = require('../internals/internal-state');\nvar defineIterator = require('../internals/define-iterator');\n\nvar ARRAY_ITERATOR = 'Array Iterator';\nvar setInternalState = InternalStateModule.set;\nvar getInternalState = InternalStateModule.getterFor(ARRAY_ITERATOR);\n\n// `Array.prototype.entries` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.entries\n// `Array.prototype.keys` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.keys\n// `Array.prototype.values` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.values\n// `Array.prototype[@@iterator]` method\n// https://tc39.github.io/ecma262/#sec-array.prototype-@@iterator\n// `CreateArrayIterator` internal method\n// https://tc39.github.io/ecma262/#sec-createarrayiterator\nmodule.exports = defineIterator(Array, 'Array', function (iterated, kind) {\n  setInternalState(this, {\n    type: ARRAY_ITERATOR,\n    target: toIndexedObject(iterated), // target\n    index: 0,                          // next index\n    kind: kind                         // kind\n  });\n// `%ArrayIteratorPrototype%.next` method\n// https://tc39.github.io/ecma262/#sec-%arrayiteratorprototype%.next\n}, function () {\n  var state = getInternalState(this);\n  var target = state.target;\n  var kind = state.kind;\n  var index = state.index++;\n  if (!target || index >= target.length) {\n    state.target = undefined;\n    return { value: undefined, done: true };\n  }\n  if (kind == 'keys') return { value: index, done: false };\n  if (kind == 'values') return { value: target[index], done: false };\n  return { value: [index, target[index]], done: false };\n}, 'values');\n\n// argumentsList[@@iterator] is %ArrayProto_values%\n// https://tc39.github.io/ecma262/#sec-createunmappedargumentsobject\n// https://tc39.github.io/ecma262/#sec-createmappedargumentsobject\nIterators.Arguments = Iterators.Array;\n\n// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables\naddToUnscopables('keys');\naddToUnscopables('values');\naddToUnscopables('entries');\n","'use strict';\nvar $ = require('../internals/export');\nvar IndexedObject = require('../internals/indexed-object');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar arrayMethodIsStrict = require('../internals/array-method-is-strict');\n\nvar nativeJoin = [].join;\n\nvar ES3_STRINGS = IndexedObject != Object;\nvar STRICT_METHOD = arrayMethodIsStrict('join', ',');\n\n// `Array.prototype.join` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.join\n$({ target: 'Array', proto: true, forced: ES3_STRINGS || !STRICT_METHOD }, {\n  join: function join(separator) {\n    return nativeJoin.call(toIndexedObject(this), separator === undefined ? ',' : separator);\n  }\n});\n","var $ = require('../internals/export');\nvar lastIndexOf = require('../internals/array-last-index-of');\n\n// `Array.prototype.lastIndexOf` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.lastindexof\n$({ target: 'Array', proto: true, forced: lastIndexOf !== [].lastIndexOf }, {\n  lastIndexOf: lastIndexOf\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $map = require('../internals/array-iteration').map;\nvar arrayMethodHasSpeciesSupport = require('../internals/array-method-has-species-support');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('map');\n// FF49- issue\nvar USES_TO_LENGTH = arrayMethodUsesToLength('map');\n\n// `Array.prototype.map` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.map\n// with adding support of @@species\n$({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT || !USES_TO_LENGTH }, {\n  map: function map(callbackfn /* , thisArg */) {\n    return $map(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar createProperty = require('../internals/create-property');\n\nvar ISNT_GENERIC = fails(function () {\n  function F() { /* empty */ }\n  return !(Array.of.call(F) instanceof F);\n});\n\n// `Array.of` method\n// https://tc39.github.io/ecma262/#sec-array.of\n// WebKit Array.of isn't generic\n$({ target: 'Array', stat: true, forced: ISNT_GENERIC }, {\n  of: function of(/* ...args */) {\n    var index = 0;\n    var argumentsLength = arguments.length;\n    var result = new (typeof this == 'function' ? this : Array)(argumentsLength);\n    while (argumentsLength > index) createProperty(result, index, arguments[index++]);\n    result.length = argumentsLength;\n    return result;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $reduceRight = require('../internals/array-reduce').right;\nvar arrayMethodIsStrict = require('../internals/array-method-is-strict');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar STRICT_METHOD = arrayMethodIsStrict('reduceRight');\n// For preventing possible almost infinite loop in non-standard implementations, test the forward version of the method\nvar USES_TO_LENGTH = arrayMethodUsesToLength('reduce', { 1: 0 });\n\n// `Array.prototype.reduceRight` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.reduceright\n$({ target: 'Array', proto: true, forced: !STRICT_METHOD || !USES_TO_LENGTH }, {\n  reduceRight: function reduceRight(callbackfn /* , initialValue */) {\n    return $reduceRight(this, callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $reduce = require('../internals/array-reduce').left;\nvar arrayMethodIsStrict = require('../internals/array-method-is-strict');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar STRICT_METHOD = arrayMethodIsStrict('reduce');\nvar USES_TO_LENGTH = arrayMethodUsesToLength('reduce', { 1: 0 });\n\n// `Array.prototype.reduce` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.reduce\n$({ target: 'Array', proto: true, forced: !STRICT_METHOD || !USES_TO_LENGTH }, {\n  reduce: function reduce(callbackfn /* , initialValue */) {\n    return $reduce(this, callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar isObject = require('../internals/is-object');\nvar isArray = require('../internals/is-array');\nvar toAbsoluteIndex = require('../internals/to-absolute-index');\nvar toLength = require('../internals/to-length');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar createProperty = require('../internals/create-property');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar arrayMethodHasSpeciesSupport = require('../internals/array-method-has-species-support');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('slice');\nvar USES_TO_LENGTH = arrayMethodUsesToLength('slice', { ACCESSORS: true, 0: 0, 1: 2 });\n\nvar SPECIES = wellKnownSymbol('species');\nvar nativeSlice = [].slice;\nvar max = Math.max;\n\n// `Array.prototype.slice` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.slice\n// fallback for not array-like ES3 strings and DOM objects\n$({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT || !USES_TO_LENGTH }, {\n  slice: function slice(start, end) {\n    var O = toIndexedObject(this);\n    var length = toLength(O.length);\n    var k = toAbsoluteIndex(start, length);\n    var fin = toAbsoluteIndex(end === undefined ? length : end, length);\n    // inline `ArraySpeciesCreate` for usage native `Array#slice` where it's possible\n    var Constructor, result, n;\n    if (isArray(O)) {\n      Constructor = O.constructor;\n      // cross-realm fallback\n      if (typeof Constructor == 'function' && (Constructor === Array || isArray(Constructor.prototype))) {\n        Constructor = undefined;\n      } else if (isObject(Constructor)) {\n        Constructor = Constructor[SPECIES];\n        if (Constructor === null) Constructor = undefined;\n      }\n      if (Constructor === Array || Constructor === undefined) {\n        return nativeSlice.call(O, k, fin);\n      }\n    }\n    result = new (Constructor === undefined ? Array : Constructor)(max(fin - k, 0));\n    for (n = 0; k < fin; k++, n++) if (k in O) createProperty(result, n, O[k]);\n    result.length = n;\n    return result;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $some = require('../internals/array-iteration').some;\nvar arrayMethodIsStrict = require('../internals/array-method-is-strict');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar STRICT_METHOD = arrayMethodIsStrict('some');\nvar USES_TO_LENGTH = arrayMethodUsesToLength('some');\n\n// `Array.prototype.some` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.some\n$({ target: 'Array', proto: true, forced: !STRICT_METHOD || !USES_TO_LENGTH }, {\n  some: function some(callbackfn /* , thisArg */) {\n    return $some(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar aFunction = require('../internals/a-function');\nvar toObject = require('../internals/to-object');\nvar fails = require('../internals/fails');\nvar arrayMethodIsStrict = require('../internals/array-method-is-strict');\n\nvar test = [];\nvar nativeSort = test.sort;\n\n// IE8-\nvar FAILS_ON_UNDEFINED = fails(function () {\n  test.sort(undefined);\n});\n// V8 bug\nvar FAILS_ON_NULL = fails(function () {\n  test.sort(null);\n});\n// Old WebKit\nvar STRICT_METHOD = arrayMethodIsStrict('sort');\n\nvar FORCED = FAILS_ON_UNDEFINED || !FAILS_ON_NULL || !STRICT_METHOD;\n\n// `Array.prototype.sort` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.sort\n$({ target: 'Array', proto: true, forced: FORCED }, {\n  sort: function sort(comparefn) {\n    return comparefn === undefined\n      ? nativeSort.call(toObject(this))\n      : nativeSort.call(toObject(this), aFunction(comparefn));\n  }\n});\n","var setSpecies = require('../internals/set-species');\n\n// `Array[@@species]` getter\n// https://tc39.github.io/ecma262/#sec-get-array-@@species\nsetSpecies('Array');\n","'use strict';\nvar $ = require('../internals/export');\nvar toAbsoluteIndex = require('../internals/to-absolute-index');\nvar toInteger = require('../internals/to-integer');\nvar toLength = require('../internals/to-length');\nvar toObject = require('../internals/to-object');\nvar arraySpeciesCreate = require('../internals/array-species-create');\nvar createProperty = require('../internals/create-property');\nvar arrayMethodHasSpeciesSupport = require('../internals/array-method-has-species-support');\nvar arrayMethodUsesToLength = require('../internals/array-method-uses-to-length');\n\nvar HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('splice');\nvar USES_TO_LENGTH = arrayMethodUsesToLength('splice', { ACCESSORS: true, 0: 0, 1: 2 });\n\nvar max = Math.max;\nvar min = Math.min;\nvar MAX_SAFE_INTEGER = 0x1FFFFFFFFFFFFF;\nvar MAXIMUM_ALLOWED_LENGTH_EXCEEDED = 'Maximum allowed length exceeded';\n\n// `Array.prototype.splice` method\n// https://tc39.github.io/ecma262/#sec-array.prototype.splice\n// with adding support of @@species\n$({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT || !USES_TO_LENGTH }, {\n  splice: function splice(start, deleteCount /* , ...items */) {\n    var O = toObject(this);\n    var len = toLength(O.length);\n    var actualStart = toAbsoluteIndex(start, len);\n    var argumentsLength = arguments.length;\n    var insertCount, actualDeleteCount, A, k, from, to;\n    if (argumentsLength === 0) {\n      insertCount = actualDeleteCount = 0;\n    } else if (argumentsLength === 1) {\n      insertCount = 0;\n      actualDeleteCount = len - actualStart;\n    } else {\n      insertCount = argumentsLength - 2;\n      actualDeleteCount = min(max(toInteger(deleteCount), 0), len - actualStart);\n    }\n    if (len + insertCount - actualDeleteCount > MAX_SAFE_INTEGER) {\n      throw TypeError(MAXIMUM_ALLOWED_LENGTH_EXCEEDED);\n    }\n    A = arraySpeciesCreate(O, actualDeleteCount);\n    for (k = 0; k < actualDeleteCount; k++) {\n      from = actualStart + k;\n      if (from in O) createProperty(A, k, O[from]);\n    }\n    A.length = actualDeleteCount;\n    if (insertCount < actualDeleteCount) {\n      for (k = actualStart; k < len - actualDeleteCount; k++) {\n        from = k + actualDeleteCount;\n        to = k + insertCount;\n        if (from in O) O[to] = O[from];\n        else delete O[to];\n      }\n      for (k = len; k > len - actualDeleteCount + insertCount; k--) delete O[k - 1];\n    } else if (insertCount > actualDeleteCount) {\n      for (k = len - actualDeleteCount; k > actualStart; k--) {\n        from = k + actualDeleteCount - 1;\n        to = k + insertCount - 1;\n        if (from in O) O[to] = O[from];\n        else delete O[to];\n      }\n    }\n    for (k = 0; k < insertCount; k++) {\n      O[k + actualStart] = arguments[k + 2];\n    }\n    O.length = len - actualDeleteCount + insertCount;\n    return A;\n  }\n});\n","// this method was added to unscopables after implementation\n// in popular engines, so it's moved to a separate module\nvar addToUnscopables = require('../internals/add-to-unscopables');\n\naddToUnscopables('flatMap');\n","// this method was added to unscopables after implementation\n// in popular engines, so it's moved to a separate module\nvar addToUnscopables = require('../internals/add-to-unscopables');\n\naddToUnscopables('flat');\n","var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar dateToPrimitive = require('../internals/date-to-primitive');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar TO_PRIMITIVE = wellKnownSymbol('toPrimitive');\nvar DatePrototype = Date.prototype;\n\n// `Date.prototype[@@toPrimitive]` method\n// https://tc39.github.io/ecma262/#sec-date.prototype-@@toprimitive\nif (!(TO_PRIMITIVE in DatePrototype)) {\n  createNonEnumerableProperty(DatePrototype, TO_PRIMITIVE, dateToPrimitive);\n}\n","'use strict';\nvar isObject = require('../internals/is-object');\nvar definePropertyModule = require('../internals/object-define-property');\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar HAS_INSTANCE = wellKnownSymbol('hasInstance');\nvar FunctionPrototype = Function.prototype;\n\n// `Function.prototype[@@hasInstance]` method\n// https://tc39.github.io/ecma262/#sec-function.prototype-@@hasinstance\nif (!(HAS_INSTANCE in FunctionPrototype)) {\n  definePropertyModule.f(FunctionPrototype, HAS_INSTANCE, { value: function (O) {\n    if (typeof this != 'function' || !isObject(O)) return false;\n    if (!isObject(this.prototype)) return O instanceof this;\n    // for environment w/o native `@@hasInstance` logic enough `instanceof`, but add this:\n    while (O = getPrototypeOf(O)) if (this.prototype === O) return true;\n    return false;\n  } });\n}\n","var DESCRIPTORS = require('../internals/descriptors');\nvar defineProperty = require('../internals/object-define-property').f;\n\nvar FunctionPrototype = Function.prototype;\nvar FunctionPrototypeToString = FunctionPrototype.toString;\nvar nameRE = /^\\s*function ([^ (]*)/;\nvar NAME = 'name';\n\n// Function instances `.name` property\n// https://tc39.github.io/ecma262/#sec-function-instances-name\nif (DESCRIPTORS && !(NAME in FunctionPrototype)) {\n  defineProperty(FunctionPrototype, NAME, {\n    configurable: true,\n    get: function () {\n      try {\n        return FunctionPrototypeToString.call(this).match(nameRE)[1];\n      } catch (error) {\n        return '';\n      }\n    }\n  });\n}\n","var $ = require('../internals/export');\nvar global = require('../internals/global');\n\n// `globalThis` object\n// https://github.com/tc39/proposal-global\n$({ global: true }, {\n  globalThis: global\n});\n","var global = require('../internals/global');\nvar setToStringTag = require('../internals/set-to-string-tag');\n\n// JSON[@@toStringTag] property\n// https://tc39.github.io/ecma262/#sec-json-@@tostringtag\nsetToStringTag(global.JSON, 'JSON', true);\n","'use strict';\nvar collection = require('../internals/collection');\nvar collectionStrong = require('../internals/collection-strong');\n\n// `Map` constructor\n// https://tc39.github.io/ecma262/#sec-map-objects\nmodule.exports = collection('Map', function (init) {\n  return function Map() { return init(this, arguments.length ? arguments[0] : undefined); };\n}, collectionStrong);\n","var $ = require('../internals/export');\nvar log1p = require('../internals/math-log1p');\n\nvar nativeAcosh = Math.acosh;\nvar log = Math.log;\nvar sqrt = Math.sqrt;\nvar LN2 = Math.LN2;\n\nvar FORCED = !nativeAcosh\n  // V8 bug: https://code.google.com/p/v8/issues/detail?id=3509\n  || Math.floor(nativeAcosh(Number.MAX_VALUE)) != 710\n  // Tor Browser bug: Math.acosh(Infinity) -> NaN\n  || nativeAcosh(Infinity) != Infinity;\n\n// `Math.acosh` method\n// https://tc39.github.io/ecma262/#sec-math.acosh\n$({ target: 'Math', stat: true, forced: FORCED }, {\n  acosh: function acosh(x) {\n    return (x = +x) < 1 ? NaN : x > 94906265.62425156\n      ? log(x) + LN2\n      : log1p(x - 1 + sqrt(x - 1) * sqrt(x + 1));\n  }\n});\n","var $ = require('../internals/export');\n\nvar nativeAsinh = Math.asinh;\nvar log = Math.log;\nvar sqrt = Math.sqrt;\n\nfunction asinh(x) {\n  return !isFinite(x = +x) || x == 0 ? x : x < 0 ? -asinh(-x) : log(x + sqrt(x * x + 1));\n}\n\n// `Math.asinh` method\n// https://tc39.github.io/ecma262/#sec-math.asinh\n// Tor Browser bug: Math.asinh(0) -> -0\n$({ target: 'Math', stat: true, forced: !(nativeAsinh && 1 / nativeAsinh(0) > 0) }, {\n  asinh: asinh\n});\n","var $ = require('../internals/export');\n\nvar nativeAtanh = Math.atanh;\nvar log = Math.log;\n\n// `Math.atanh` method\n// https://tc39.github.io/ecma262/#sec-math.atanh\n// Tor Browser bug: Math.atanh(-0) -> 0\n$({ target: 'Math', stat: true, forced: !(nativeAtanh && 1 / nativeAtanh(-0) < 0) }, {\n  atanh: function atanh(x) {\n    return (x = +x) == 0 ? x : log((1 + x) / (1 - x)) / 2;\n  }\n});\n","var $ = require('../internals/export');\nvar sign = require('../internals/math-sign');\n\nvar abs = Math.abs;\nvar pow = Math.pow;\n\n// `Math.cbrt` method\n// https://tc39.github.io/ecma262/#sec-math.cbrt\n$({ target: 'Math', stat: true }, {\n  cbrt: function cbrt(x) {\n    return sign(x = +x) * pow(abs(x), 1 / 3);\n  }\n});\n","var $ = require('../internals/export');\n\nvar floor = Math.floor;\nvar log = Math.log;\nvar LOG2E = Math.LOG2E;\n\n// `Math.clz32` method\n// https://tc39.github.io/ecma262/#sec-math.clz32\n$({ target: 'Math', stat: true }, {\n  clz32: function clz32(x) {\n    return (x >>>= 0) ? 31 - floor(log(x + 0.5) * LOG2E) : 32;\n  }\n});\n","var $ = require('../internals/export');\nvar expm1 = require('../internals/math-expm1');\n\nvar nativeCosh = Math.cosh;\nvar abs = Math.abs;\nvar E = Math.E;\n\n// `Math.cosh` method\n// https://tc39.github.io/ecma262/#sec-math.cosh\n$({ target: 'Math', stat: true, forced: !nativeCosh || nativeCosh(710) === Infinity }, {\n  cosh: function cosh(x) {\n    var t = expm1(abs(x) - 1) + 1;\n    return (t + 1 / (t * E * E)) * (E / 2);\n  }\n});\n","var $ = require('../internals/export');\nvar expm1 = require('../internals/math-expm1');\n\n// `Math.expm1` method\n// https://tc39.github.io/ecma262/#sec-math.expm1\n$({ target: 'Math', stat: true, forced: expm1 != Math.expm1 }, { expm1: expm1 });\n","var $ = require('../internals/export');\nvar fround = require('../internals/math-fround');\n\n// `Math.fround` method\n// https://tc39.github.io/ecma262/#sec-math.fround\n$({ target: 'Math', stat: true }, { fround: fround });\n","var $ = require('../internals/export');\n\nvar $hypot = Math.hypot;\nvar abs = Math.abs;\nvar sqrt = Math.sqrt;\n\n// Chrome 77 bug\n// https://bugs.chromium.org/p/v8/issues/detail?id=9546\nvar BUGGY = !!$hypot && $hypot(Infinity, NaN) !== Infinity;\n\n// `Math.hypot` method\n// https://tc39.github.io/ecma262/#sec-math.hypot\n$({ target: 'Math', stat: true, forced: BUGGY }, {\n  hypot: function hypot(value1, value2) { // eslint-disable-line no-unused-vars\n    var sum = 0;\n    var i = 0;\n    var aLen = arguments.length;\n    var larg = 0;\n    var arg, div;\n    while (i < aLen) {\n      arg = abs(arguments[i++]);\n      if (larg < arg) {\n        div = larg / arg;\n        sum = sum * div * div + 1;\n        larg = arg;\n      } else if (arg > 0) {\n        div = arg / larg;\n        sum += div * div;\n      } else sum += arg;\n    }\n    return larg === Infinity ? Infinity : larg * sqrt(sum);\n  }\n});\n","var $ = require('../internals/export');\nvar fails = require('../internals/fails');\n\nvar nativeImul = Math.imul;\n\nvar FORCED = fails(function () {\n  return nativeImul(0xFFFFFFFF, 5) != -5 || nativeImul.length != 2;\n});\n\n// `Math.imul` method\n// https://tc39.github.io/ecma262/#sec-math.imul\n// some WebKit versions fails with big numbers, some has wrong arity\n$({ target: 'Math', stat: true, forced: FORCED }, {\n  imul: function imul(x, y) {\n    var UINT16 = 0xFFFF;\n    var xn = +x;\n    var yn = +y;\n    var xl = UINT16 & xn;\n    var yl = UINT16 & yn;\n    return 0 | xl * yl + ((UINT16 & xn >>> 16) * yl + xl * (UINT16 & yn >>> 16) << 16 >>> 0);\n  }\n});\n","var $ = require('../internals/export');\n\nvar log = Math.log;\nvar LOG10E = Math.LOG10E;\n\n// `Math.log10` method\n// https://tc39.github.io/ecma262/#sec-math.log10\n$({ target: 'Math', stat: true }, {\n  log10: function log10(x) {\n    return log(x) * LOG10E;\n  }\n});\n","var $ = require('../internals/export');\nvar log1p = require('../internals/math-log1p');\n\n// `Math.log1p` method\n// https://tc39.github.io/ecma262/#sec-math.log1p\n$({ target: 'Math', stat: true }, { log1p: log1p });\n","var $ = require('../internals/export');\n\nvar log = Math.log;\nvar LN2 = Math.LN2;\n\n// `Math.log2` method\n// https://tc39.github.io/ecma262/#sec-math.log2\n$({ target: 'Math', stat: true }, {\n  log2: function log2(x) {\n    return log(x) / LN2;\n  }\n});\n","var $ = require('../internals/export');\nvar sign = require('../internals/math-sign');\n\n// `Math.sign` method\n// https://tc39.github.io/ecma262/#sec-math.sign\n$({ target: 'Math', stat: true }, {\n  sign: sign\n});\n","var $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar expm1 = require('../internals/math-expm1');\n\nvar abs = Math.abs;\nvar exp = Math.exp;\nvar E = Math.E;\n\nvar FORCED = fails(function () {\n  return Math.sinh(-2e-17) != -2e-17;\n});\n\n// `Math.sinh` method\n// https://tc39.github.io/ecma262/#sec-math.sinh\n// V8 near Chromium 38 has a problem with very small numbers\n$({ target: 'Math', stat: true, forced: FORCED }, {\n  sinh: function sinh(x) {\n    return abs(x = +x) < 1 ? (expm1(x) - expm1(-x)) / 2 : (exp(x - 1) - exp(-x - 1)) * (E / 2);\n  }\n});\n","var $ = require('../internals/export');\nvar expm1 = require('../internals/math-expm1');\n\nvar exp = Math.exp;\n\n// `Math.tanh` method\n// https://tc39.github.io/ecma262/#sec-math.tanh\n$({ target: 'Math', stat: true }, {\n  tanh: function tanh(x) {\n    var a = expm1(x = +x);\n    var b = expm1(-x);\n    return a == Infinity ? 1 : b == Infinity ? -1 : (a - b) / (exp(x) + exp(-x));\n  }\n});\n","var setToStringTag = require('../internals/set-to-string-tag');\n\n// Math[@@toStringTag] property\n// https://tc39.github.io/ecma262/#sec-math-@@tostringtag\nsetToStringTag(Math, 'Math', true);\n","var $ = require('../internals/export');\n\nvar ceil = Math.ceil;\nvar floor = Math.floor;\n\n// `Math.trunc` method\n// https://tc39.github.io/ecma262/#sec-math.trunc\n$({ target: 'Math', stat: true }, {\n  trunc: function trunc(it) {\n    return (it > 0 ? floor : ceil)(it);\n  }\n});\n","'use strict';\nvar DESCRIPTORS = require('../internals/descriptors');\nvar global = require('../internals/global');\nvar isForced = require('../internals/is-forced');\nvar redefine = require('../internals/redefine');\nvar has = require('../internals/has');\nvar classof = require('../internals/classof-raw');\nvar inheritIfRequired = require('../internals/inherit-if-required');\nvar toPrimitive = require('../internals/to-primitive');\nvar fails = require('../internals/fails');\nvar create = require('../internals/object-create');\nvar getOwnPropertyNames = require('../internals/object-get-own-property-names').f;\nvar getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\nvar defineProperty = require('../internals/object-define-property').f;\nvar trim = require('../internals/string-trim').trim;\n\nvar NUMBER = 'Number';\nvar NativeNumber = global[NUMBER];\nvar NumberPrototype = NativeNumber.prototype;\n\n// Opera ~12 has broken Object#toString\nvar BROKEN_CLASSOF = classof(create(NumberPrototype)) == NUMBER;\n\n// `ToNumber` abstract operation\n// https://tc39.github.io/ecma262/#sec-tonumber\nvar toNumber = function (argument) {\n  var it = toPrimitive(argument, false);\n  var first, third, radix, maxCode, digits, length, index, code;\n  if (typeof it == 'string' && it.length > 2) {\n    it = trim(it);\n    first = it.charCodeAt(0);\n    if (first === 43 || first === 45) {\n      third = it.charCodeAt(2);\n      if (third === 88 || third === 120) return NaN; // Number('+0x1') should be NaN, old V8 fix\n    } else if (first === 48) {\n      switch (it.charCodeAt(1)) {\n        case 66: case 98: radix = 2; maxCode = 49; break; // fast equal of /^0b[01]+$/i\n        case 79: case 111: radix = 8; maxCode = 55; break; // fast equal of /^0o[0-7]+$/i\n        default: return +it;\n      }\n      digits = it.slice(2);\n      length = digits.length;\n      for (index = 0; index < length; index++) {\n        code = digits.charCodeAt(index);\n        // parseInt parses a string to a first unavailable symbol\n        // but ToNumber should return NaN if a string contains unavailable symbols\n        if (code < 48 || code > maxCode) return NaN;\n      } return parseInt(digits, radix);\n    }\n  } return +it;\n};\n\n// `Number` constructor\n// https://tc39.github.io/ecma262/#sec-number-constructor\nif (isForced(NUMBER, !NativeNumber(' 0o1') || !NativeNumber('0b1') || NativeNumber('+0x1'))) {\n  var NumberWrapper = function Number(value) {\n    var it = arguments.length < 1 ? 0 : value;\n    var dummy = this;\n    return dummy instanceof NumberWrapper\n      // check on 1..constructor(foo) case\n      && (BROKEN_CLASSOF ? fails(function () { NumberPrototype.valueOf.call(dummy); }) : classof(dummy) != NUMBER)\n        ? inheritIfRequired(new NativeNumber(toNumber(it)), dummy, NumberWrapper) : toNumber(it);\n  };\n  for (var keys = DESCRIPTORS ? getOwnPropertyNames(NativeNumber) : (\n    // ES3:\n    'MAX_VALUE,MIN_VALUE,NaN,NEGATIVE_INFINITY,POSITIVE_INFINITY,' +\n    // ES2015 (in case, if modules with ES2015 Number statics required before):\n    'EPSILON,isFinite,isInteger,isNaN,isSafeInteger,MAX_SAFE_INTEGER,' +\n    'MIN_SAFE_INTEGER,parseFloat,parseInt,isInteger'\n  ).split(','), j = 0, key; keys.length > j; j++) {\n    if (has(NativeNumber, key = keys[j]) && !has(NumberWrapper, key)) {\n      defineProperty(NumberWrapper, key, getOwnPropertyDescriptor(NativeNumber, key));\n    }\n  }\n  NumberWrapper.prototype = NumberPrototype;\n  NumberPrototype.constructor = NumberWrapper;\n  redefine(global, NUMBER, NumberWrapper);\n}\n","var $ = require('../internals/export');\n\n// `Number.EPSILON` constant\n// https://tc39.github.io/ecma262/#sec-number.epsilon\n$({ target: 'Number', stat: true }, {\n  EPSILON: Math.pow(2, -52)\n});\n","var $ = require('../internals/export');\nvar numberIsFinite = require('../internals/number-is-finite');\n\n// `Number.isFinite` method\n// https://tc39.github.io/ecma262/#sec-number.isfinite\n$({ target: 'Number', stat: true }, { isFinite: numberIsFinite });\n","var $ = require('../internals/export');\nvar isInteger = require('../internals/is-integer');\n\n// `Number.isInteger` method\n// https://tc39.github.io/ecma262/#sec-number.isinteger\n$({ target: 'Number', stat: true }, {\n  isInteger: isInteger\n});\n","var $ = require('../internals/export');\n\n// `Number.isNaN` method\n// https://tc39.github.io/ecma262/#sec-number.isnan\n$({ target: 'Number', stat: true }, {\n  isNaN: function isNaN(number) {\n    // eslint-disable-next-line no-self-compare\n    return number != number;\n  }\n});\n","var $ = require('../internals/export');\nvar isInteger = require('../internals/is-integer');\n\nvar abs = Math.abs;\n\n// `Number.isSafeInteger` method\n// https://tc39.github.io/ecma262/#sec-number.issafeinteger\n$({ target: 'Number', stat: true }, {\n  isSafeInteger: function isSafeInteger(number) {\n    return isInteger(number) && abs(number) <= 0x1FFFFFFFFFFFFF;\n  }\n});\n","var $ = require('../internals/export');\n\n// `Number.MAX_SAFE_INTEGER` constant\n// https://tc39.github.io/ecma262/#sec-number.max_safe_integer\n$({ target: 'Number', stat: true }, {\n  MAX_SAFE_INTEGER: 0x1FFFFFFFFFFFFF\n});\n","var $ = require('../internals/export');\n\n// `Number.MIN_SAFE_INTEGER` constant\n// https://tc39.github.io/ecma262/#sec-number.min_safe_integer\n$({ target: 'Number', stat: true }, {\n  MIN_SAFE_INTEGER: -0x1FFFFFFFFFFFFF\n});\n","var $ = require('../internals/export');\nvar parseFloat = require('../internals/number-parse-float');\n\n// `Number.parseFloat` method\n// https://tc39.github.io/ecma262/#sec-number.parseFloat\n$({ target: 'Number', stat: true, forced: Number.parseFloat != parseFloat }, {\n  parseFloat: parseFloat\n});\n","var $ = require('../internals/export');\nvar parseInt = require('../internals/number-parse-int');\n\n// `Number.parseInt` method\n// https://tc39.github.io/ecma262/#sec-number.parseint\n$({ target: 'Number', stat: true, forced: Number.parseInt != parseInt }, {\n  parseInt: parseInt\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar toInteger = require('../internals/to-integer');\nvar thisNumberValue = require('../internals/this-number-value');\nvar repeat = require('../internals/string-repeat');\nvar fails = require('../internals/fails');\n\nvar nativeToFixed = 1.0.toFixed;\nvar floor = Math.floor;\n\nvar pow = function (x, n, acc) {\n  return n === 0 ? acc : n % 2 === 1 ? pow(x, n - 1, acc * x) : pow(x * x, n / 2, acc);\n};\n\nvar log = function (x) {\n  var n = 0;\n  var x2 = x;\n  while (x2 >= 4096) {\n    n += 12;\n    x2 /= 4096;\n  }\n  while (x2 >= 2) {\n    n += 1;\n    x2 /= 2;\n  } return n;\n};\n\nvar FORCED = nativeToFixed && (\n  0.00008.toFixed(3) !== '0.000' ||\n  0.9.toFixed(0) !== '1' ||\n  1.255.toFixed(2) !== '1.25' ||\n  1000000000000000128.0.toFixed(0) !== '1000000000000000128'\n) || !fails(function () {\n  // V8 ~ Android 4.3-\n  nativeToFixed.call({});\n});\n\n// `Number.prototype.toFixed` method\n// https://tc39.github.io/ecma262/#sec-number.prototype.tofixed\n$({ target: 'Number', proto: true, forced: FORCED }, {\n  // eslint-disable-next-line max-statements\n  toFixed: function toFixed(fractionDigits) {\n    var number = thisNumberValue(this);\n    var fractDigits = toInteger(fractionDigits);\n    var data = [0, 0, 0, 0, 0, 0];\n    var sign = '';\n    var result = '0';\n    var e, z, j, k;\n\n    var multiply = function (n, c) {\n      var index = -1;\n      var c2 = c;\n      while (++index < 6) {\n        c2 += n * data[index];\n        data[index] = c2 % 1e7;\n        c2 = floor(c2 / 1e7);\n      }\n    };\n\n    var divide = function (n) {\n      var index = 6;\n      var c = 0;\n      while (--index >= 0) {\n        c += data[index];\n        data[index] = floor(c / n);\n        c = (c % n) * 1e7;\n      }\n    };\n\n    var dataToString = function () {\n      var index = 6;\n      var s = '';\n      while (--index >= 0) {\n        if (s !== '' || index === 0 || data[index] !== 0) {\n          var t = String(data[index]);\n          s = s === '' ? t : s + repeat.call('0', 7 - t.length) + t;\n        }\n      } return s;\n    };\n\n    if (fractDigits < 0 || fractDigits > 20) throw RangeError('Incorrect fraction digits');\n    // eslint-disable-next-line no-self-compare\n    if (number != number) return 'NaN';\n    if (number <= -1e21 || number >= 1e21) return String(number);\n    if (number < 0) {\n      sign = '-';\n      number = -number;\n    }\n    if (number > 1e-21) {\n      e = log(number * pow(2, 69, 1)) - 69;\n      z = e < 0 ? number * pow(2, -e, 1) : number / pow(2, e, 1);\n      z *= 0x10000000000000;\n      e = 52 - e;\n      if (e > 0) {\n        multiply(0, z);\n        j = fractDigits;\n        while (j >= 7) {\n          multiply(1e7, 0);\n          j -= 7;\n        }\n        multiply(pow(10, j, 1), 0);\n        j = e - 1;\n        while (j >= 23) {\n          divide(1 << 23);\n          j -= 23;\n        }\n        divide(1 << j);\n        multiply(1, 1);\n        divide(2);\n        result = dataToString();\n      } else {\n        multiply(0, z);\n        multiply(1 << -e, 0);\n        result = dataToString() + repeat.call('0', fractDigits);\n      }\n    }\n    if (fractDigits > 0) {\n      k = result.length;\n      result = sign + (k <= fractDigits\n        ? '0.' + repeat.call('0', fractDigits - k) + result\n        : result.slice(0, k - fractDigits) + '.' + result.slice(k - fractDigits));\n    } else {\n      result = sign + result;\n    } return result;\n  }\n});\n","var $ = require('../internals/export');\nvar assign = require('../internals/object-assign');\n\n// `Object.assign` method\n// https://tc39.github.io/ecma262/#sec-object.assign\n$({ target: 'Object', stat: true, forced: Object.assign !== assign }, {\n  assign: assign\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar FORCED = require('../internals/object-prototype-accessors-forced');\nvar toObject = require('../internals/to-object');\nvar aFunction = require('../internals/a-function');\nvar definePropertyModule = require('../internals/object-define-property');\n\n// `Object.prototype.__defineGetter__` method\n// https://tc39.github.io/ecma262/#sec-object.prototype.__defineGetter__\nif (DESCRIPTORS) {\n  $({ target: 'Object', proto: true, forced: FORCED }, {\n    __defineGetter__: function __defineGetter__(P, getter) {\n      definePropertyModule.f(toObject(this), P, { get: aFunction(getter), enumerable: true, configurable: true });\n    }\n  });\n}\n","'use strict';\nvar $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar FORCED = require('../internals/object-prototype-accessors-forced');\nvar toObject = require('../internals/to-object');\nvar aFunction = require('../internals/a-function');\nvar definePropertyModule = require('../internals/object-define-property');\n\n// `Object.prototype.__defineSetter__` method\n// https://tc39.github.io/ecma262/#sec-object.prototype.__defineSetter__\nif (DESCRIPTORS) {\n  $({ target: 'Object', proto: true, forced: FORCED }, {\n    __defineSetter__: function __defineSetter__(P, setter) {\n      definePropertyModule.f(toObject(this), P, { set: aFunction(setter), enumerable: true, configurable: true });\n    }\n  });\n}\n","var $ = require('../internals/export');\nvar $entries = require('../internals/object-to-array').entries;\n\n// `Object.entries` method\n// https://tc39.github.io/ecma262/#sec-object.entries\n$({ target: 'Object', stat: true }, {\n  entries: function entries(O) {\n    return $entries(O);\n  }\n});\n","var $ = require('../internals/export');\nvar FREEZING = require('../internals/freezing');\nvar fails = require('../internals/fails');\nvar isObject = require('../internals/is-object');\nvar onFreeze = require('../internals/internal-metadata').onFreeze;\n\nvar nativeFreeze = Object.freeze;\nvar FAILS_ON_PRIMITIVES = fails(function () { nativeFreeze(1); });\n\n// `Object.freeze` method\n// https://tc39.github.io/ecma262/#sec-object.freeze\n$({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES, sham: !FREEZING }, {\n  freeze: function freeze(it) {\n    return nativeFreeze && isObject(it) ? nativeFreeze(onFreeze(it)) : it;\n  }\n});\n","var $ = require('../internals/export');\nvar iterate = require('../internals/iterate');\nvar createProperty = require('../internals/create-property');\n\n// `Object.fromEntries` method\n// https://github.com/tc39/proposal-object-from-entries\n$({ target: 'Object', stat: true }, {\n  fromEntries: function fromEntries(iterable) {\n    var obj = {};\n    iterate(iterable, function (k, v) {\n      createProperty(obj, k, v);\n    }, undefined, true);\n    return obj;\n  }\n});\n","var $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar nativeGetOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\nvar DESCRIPTORS = require('../internals/descriptors');\n\nvar FAILS_ON_PRIMITIVES = fails(function () { nativeGetOwnPropertyDescriptor(1); });\nvar FORCED = !DESCRIPTORS || FAILS_ON_PRIMITIVES;\n\n// `Object.getOwnPropertyDescriptor` method\n// https://tc39.github.io/ecma262/#sec-object.getownpropertydescriptor\n$({ target: 'Object', stat: true, forced: FORCED, sham: !DESCRIPTORS }, {\n  getOwnPropertyDescriptor: function getOwnPropertyDescriptor(it, key) {\n    return nativeGetOwnPropertyDescriptor(toIndexedObject(it), key);\n  }\n});\n","var $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar ownKeys = require('../internals/own-keys');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');\nvar createProperty = require('../internals/create-property');\n\n// `Object.getOwnPropertyDescriptors` method\n// https://tc39.github.io/ecma262/#sec-object.getownpropertydescriptors\n$({ target: 'Object', stat: true, sham: !DESCRIPTORS }, {\n  getOwnPropertyDescriptors: function getOwnPropertyDescriptors(object) {\n    var O = toIndexedObject(object);\n    var getOwnPropertyDescriptor = getOwnPropertyDescriptorModule.f;\n    var keys = ownKeys(O);\n    var result = {};\n    var index = 0;\n    var key, descriptor;\n    while (keys.length > index) {\n      descriptor = getOwnPropertyDescriptor(O, key = keys[index++]);\n      if (descriptor !== undefined) createProperty(result, key, descriptor);\n    }\n    return result;\n  }\n});\n","var $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar nativeGetOwnPropertyNames = require('../internals/object-get-own-property-names-external').f;\n\nvar FAILS_ON_PRIMITIVES = fails(function () { return !Object.getOwnPropertyNames(1); });\n\n// `Object.getOwnPropertyNames` method\n// https://tc39.github.io/ecma262/#sec-object.getownpropertynames\n$({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES }, {\n  getOwnPropertyNames: nativeGetOwnPropertyNames\n});\n","var $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar toObject = require('../internals/to-object');\nvar nativeGetPrototypeOf = require('../internals/object-get-prototype-of');\nvar CORRECT_PROTOTYPE_GETTER = require('../internals/correct-prototype-getter');\n\nvar FAILS_ON_PRIMITIVES = fails(function () { nativeGetPrototypeOf(1); });\n\n// `Object.getPrototypeOf` method\n// https://tc39.github.io/ecma262/#sec-object.getprototypeof\n$({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES, sham: !CORRECT_PROTOTYPE_GETTER }, {\n  getPrototypeOf: function getPrototypeOf(it) {\n    return nativeGetPrototypeOf(toObject(it));\n  }\n});\n\n","var $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar isObject = require('../internals/is-object');\n\nvar nativeIsExtensible = Object.isExtensible;\nvar FAILS_ON_PRIMITIVES = fails(function () { nativeIsExtensible(1); });\n\n// `Object.isExtensible` method\n// https://tc39.github.io/ecma262/#sec-object.isextensible\n$({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES }, {\n  isExtensible: function isExtensible(it) {\n    return isObject(it) ? nativeIsExtensible ? nativeIsExtensible(it) : true : false;\n  }\n});\n","var $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar isObject = require('../internals/is-object');\n\nvar nativeIsFrozen = Object.isFrozen;\nvar FAILS_ON_PRIMITIVES = fails(function () { nativeIsFrozen(1); });\n\n// `Object.isFrozen` method\n// https://tc39.github.io/ecma262/#sec-object.isfrozen\n$({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES }, {\n  isFrozen: function isFrozen(it) {\n    return isObject(it) ? nativeIsFrozen ? nativeIsFrozen(it) : false : true;\n  }\n});\n","var $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar isObject = require('../internals/is-object');\n\nvar nativeIsSealed = Object.isSealed;\nvar FAILS_ON_PRIMITIVES = fails(function () { nativeIsSealed(1); });\n\n// `Object.isSealed` method\n// https://tc39.github.io/ecma262/#sec-object.issealed\n$({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES }, {\n  isSealed: function isSealed(it) {\n    return isObject(it) ? nativeIsSealed ? nativeIsSealed(it) : false : true;\n  }\n});\n","var $ = require('../internals/export');\nvar is = require('../internals/same-value');\n\n// `Object.is` method\n// https://tc39.github.io/ecma262/#sec-object.is\n$({ target: 'Object', stat: true }, {\n  is: is\n});\n","var $ = require('../internals/export');\nvar toObject = require('../internals/to-object');\nvar nativeKeys = require('../internals/object-keys');\nvar fails = require('../internals/fails');\n\nvar FAILS_ON_PRIMITIVES = fails(function () { nativeKeys(1); });\n\n// `Object.keys` method\n// https://tc39.github.io/ecma262/#sec-object.keys\n$({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES }, {\n  keys: function keys(it) {\n    return nativeKeys(toObject(it));\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar FORCED = require('../internals/object-prototype-accessors-forced');\nvar toObject = require('../internals/to-object');\nvar toPrimitive = require('../internals/to-primitive');\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\nvar getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\n\n// `Object.prototype.__lookupGetter__` method\n// https://tc39.github.io/ecma262/#sec-object.prototype.__lookupGetter__\nif (DESCRIPTORS) {\n  $({ target: 'Object', proto: true, forced: FORCED }, {\n    __lookupGetter__: function __lookupGetter__(P) {\n      var O = toObject(this);\n      var key = toPrimitive(P, true);\n      var desc;\n      do {\n        if (desc = getOwnPropertyDescriptor(O, key)) return desc.get;\n      } while (O = getPrototypeOf(O));\n    }\n  });\n}\n","'use strict';\nvar $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar FORCED = require('../internals/object-prototype-accessors-forced');\nvar toObject = require('../internals/to-object');\nvar toPrimitive = require('../internals/to-primitive');\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\nvar getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\n\n// `Object.prototype.__lookupSetter__` method\n// https://tc39.github.io/ecma262/#sec-object.prototype.__lookupSetter__\nif (DESCRIPTORS) {\n  $({ target: 'Object', proto: true, forced: FORCED }, {\n    __lookupSetter__: function __lookupSetter__(P) {\n      var O = toObject(this);\n      var key = toPrimitive(P, true);\n      var desc;\n      do {\n        if (desc = getOwnPropertyDescriptor(O, key)) return desc.set;\n      } while (O = getPrototypeOf(O));\n    }\n  });\n}\n","var $ = require('../internals/export');\nvar isObject = require('../internals/is-object');\nvar onFreeze = require('../internals/internal-metadata').onFreeze;\nvar FREEZING = require('../internals/freezing');\nvar fails = require('../internals/fails');\n\nvar nativePreventExtensions = Object.preventExtensions;\nvar FAILS_ON_PRIMITIVES = fails(function () { nativePreventExtensions(1); });\n\n// `Object.preventExtensions` method\n// https://tc39.github.io/ecma262/#sec-object.preventextensions\n$({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES, sham: !FREEZING }, {\n  preventExtensions: function preventExtensions(it) {\n    return nativePreventExtensions && isObject(it) ? nativePreventExtensions(onFreeze(it)) : it;\n  }\n});\n","var $ = require('../internals/export');\nvar isObject = require('../internals/is-object');\nvar onFreeze = require('../internals/internal-metadata').onFreeze;\nvar FREEZING = require('../internals/freezing');\nvar fails = require('../internals/fails');\n\nvar nativeSeal = Object.seal;\nvar FAILS_ON_PRIMITIVES = fails(function () { nativeSeal(1); });\n\n// `Object.seal` method\n// https://tc39.github.io/ecma262/#sec-object.seal\n$({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES, sham: !FREEZING }, {\n  seal: function seal(it) {\n    return nativeSeal && isObject(it) ? nativeSeal(onFreeze(it)) : it;\n  }\n});\n","var TO_STRING_TAG_SUPPORT = require('../internals/to-string-tag-support');\nvar redefine = require('../internals/redefine');\nvar toString = require('../internals/object-to-string');\n\n// `Object.prototype.toString` method\n// https://tc39.github.io/ecma262/#sec-object.prototype.tostring\nif (!TO_STRING_TAG_SUPPORT) {\n  redefine(Object.prototype, 'toString', toString, { unsafe: true });\n}\n","var $ = require('../internals/export');\nvar $values = require('../internals/object-to-array').values;\n\n// `Object.values` method\n// https://tc39.github.io/ecma262/#sec-object.values\n$({ target: 'Object', stat: true }, {\n  values: function values(O) {\n    return $values(O);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar aFunction = require('../internals/a-function');\nvar newPromiseCapabilityModule = require('../internals/new-promise-capability');\nvar perform = require('../internals/perform');\nvar iterate = require('../internals/iterate');\n\n// `Promise.allSettled` method\n// https://github.com/tc39/proposal-promise-allSettled\n$({ target: 'Promise', stat: true }, {\n  allSettled: function allSettled(iterable) {\n    var C = this;\n    var capability = newPromiseCapabilityModule.f(C);\n    var resolve = capability.resolve;\n    var reject = capability.reject;\n    var result = perform(function () {\n      var promiseResolve = aFunction(C.resolve);\n      var values = [];\n      var counter = 0;\n      var remaining = 1;\n      iterate(iterable, function (promise) {\n        var index = counter++;\n        var alreadyCalled = false;\n        values.push(undefined);\n        remaining++;\n        promiseResolve.call(C, promise).then(function (value) {\n          if (alreadyCalled) return;\n          alreadyCalled = true;\n          values[index] = { status: 'fulfilled', value: value };\n          --remaining || resolve(values);\n        }, function (e) {\n          if (alreadyCalled) return;\n          alreadyCalled = true;\n          values[index] = { status: 'rejected', reason: e };\n          --remaining || resolve(values);\n        });\n      });\n      --remaining || resolve(values);\n    });\n    if (result.error) reject(result.value);\n    return capability.promise;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar NativePromise = require('../internals/native-promise-constructor');\nvar fails = require('../internals/fails');\nvar getBuiltIn = require('../internals/get-built-in');\nvar speciesConstructor = require('../internals/species-constructor');\nvar promiseResolve = require('../internals/promise-resolve');\nvar redefine = require('../internals/redefine');\n\n// Safari bug https://bugs.webkit.org/show_bug.cgi?id=200829\nvar NON_GENERIC = !!NativePromise && fails(function () {\n  NativePromise.prototype['finally'].call({ then: function () { /* empty */ } }, function () { /* empty */ });\n});\n\n// `Promise.prototype.finally` method\n// https://tc39.github.io/ecma262/#sec-promise.prototype.finally\n$({ target: 'Promise', proto: true, real: true, forced: NON_GENERIC }, {\n  'finally': function (onFinally) {\n    var C = speciesConstructor(this, getBuiltIn('Promise'));\n    var isFunction = typeof onFinally == 'function';\n    return this.then(\n      isFunction ? function (x) {\n        return promiseResolve(C, onFinally()).then(function () { return x; });\n      } : onFinally,\n      isFunction ? function (e) {\n        return promiseResolve(C, onFinally()).then(function () { throw e; });\n      } : onFinally\n    );\n  }\n});\n\n// patch native Promise.prototype for native async functions\nif (!IS_PURE && typeof NativePromise == 'function' && !NativePromise.prototype['finally']) {\n  redefine(NativePromise.prototype, 'finally', getBuiltIn('Promise').prototype['finally']);\n}\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar global = require('../internals/global');\nvar getBuiltIn = require('../internals/get-built-in');\nvar NativePromise = require('../internals/native-promise-constructor');\nvar redefine = require('../internals/redefine');\nvar redefineAll = require('../internals/redefine-all');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar setSpecies = require('../internals/set-species');\nvar isObject = require('../internals/is-object');\nvar aFunction = require('../internals/a-function');\nvar anInstance = require('../internals/an-instance');\nvar classof = require('../internals/classof-raw');\nvar inspectSource = require('../internals/inspect-source');\nvar iterate = require('../internals/iterate');\nvar checkCorrectnessOfIteration = require('../internals/check-correctness-of-iteration');\nvar speciesConstructor = require('../internals/species-constructor');\nvar task = require('../internals/task').set;\nvar microtask = require('../internals/microtask');\nvar promiseResolve = require('../internals/promise-resolve');\nvar hostReportErrors = require('../internals/host-report-errors');\nvar newPromiseCapabilityModule = require('../internals/new-promise-capability');\nvar perform = require('../internals/perform');\nvar InternalStateModule = require('../internals/internal-state');\nvar isForced = require('../internals/is-forced');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar V8_VERSION = require('../internals/engine-v8-version');\n\nvar SPECIES = wellKnownSymbol('species');\nvar PROMISE = 'Promise';\nvar getInternalState = InternalStateModule.get;\nvar setInternalState = InternalStateModule.set;\nvar getInternalPromiseState = InternalStateModule.getterFor(PROMISE);\nvar PromiseConstructor = NativePromise;\nvar TypeError = global.TypeError;\nvar document = global.document;\nvar process = global.process;\nvar $fetch = getBuiltIn('fetch');\nvar newPromiseCapability = newPromiseCapabilityModule.f;\nvar newGenericPromiseCapability = newPromiseCapability;\nvar IS_NODE = classof(process) == 'process';\nvar DISPATCH_EVENT = !!(document && document.createEvent && global.dispatchEvent);\nvar UNHANDLED_REJECTION = 'unhandledrejection';\nvar REJECTION_HANDLED = 'rejectionhandled';\nvar PENDING = 0;\nvar FULFILLED = 1;\nvar REJECTED = 2;\nvar HANDLED = 1;\nvar UNHANDLED = 2;\nvar Internal, OwnPromiseCapability, PromiseWrapper, nativeThen;\n\nvar FORCED = isForced(PROMISE, function () {\n  var GLOBAL_CORE_JS_PROMISE = inspectSource(PromiseConstructor) !== String(PromiseConstructor);\n  if (!GLOBAL_CORE_JS_PROMISE) {\n    // V8 6.6 (Node 10 and Chrome 66) have a bug with resolving custom thenables\n    // https://bugs.chromium.org/p/chromium/issues/detail?id=830565\n    // We can't detect it synchronously, so just check versions\n    if (V8_VERSION === 66) return true;\n    // Unhandled rejections tracking support, NodeJS Promise without it fails @@species test\n    if (!IS_NODE && typeof PromiseRejectionEvent != 'function') return true;\n  }\n  // We need Promise#finally in the pure version for preventing prototype pollution\n  if (IS_PURE && !PromiseConstructor.prototype['finally']) return true;\n  // We can't use @@species feature detection in V8 since it causes\n  // deoptimization and performance degradation\n  // https://github.com/zloirock/core-js/issues/679\n  if (V8_VERSION >= 51 && /native code/.test(PromiseConstructor)) return false;\n  // Detect correctness of subclassing with @@species support\n  var promise = PromiseConstructor.resolve(1);\n  var FakePromise = function (exec) {\n    exec(function () { /* empty */ }, function () { /* empty */ });\n  };\n  var constructor = promise.constructor = {};\n  constructor[SPECIES] = FakePromise;\n  return !(promise.then(function () { /* empty */ }) instanceof FakePromise);\n});\n\nvar INCORRECT_ITERATION = FORCED || !checkCorrectnessOfIteration(function (iterable) {\n  PromiseConstructor.all(iterable)['catch'](function () { /* empty */ });\n});\n\n// helpers\nvar isThenable = function (it) {\n  var then;\n  return isObject(it) && typeof (then = it.then) == 'function' ? then : false;\n};\n\nvar notify = function (promise, state, isReject) {\n  if (state.notified) return;\n  state.notified = true;\n  var chain = state.reactions;\n  microtask(function () {\n    var value = state.value;\n    var ok = state.state == FULFILLED;\n    var index = 0;\n    // variable length - can't use forEach\n    while (chain.length > index) {\n      var reaction = chain[index++];\n      var handler = ok ? reaction.ok : reaction.fail;\n      var resolve = reaction.resolve;\n      var reject = reaction.reject;\n      var domain = reaction.domain;\n      var result, then, exited;\n      try {\n        if (handler) {\n          if (!ok) {\n            if (state.rejection === UNHANDLED) onHandleUnhandled(promise, state);\n            state.rejection = HANDLED;\n          }\n          if (handler === true) result = value;\n          else {\n            if (domain) domain.enter();\n            result = handler(value); // can throw\n            if (domain) {\n              domain.exit();\n              exited = true;\n            }\n          }\n          if (result === reaction.promise) {\n            reject(TypeError('Promise-chain cycle'));\n          } else if (then = isThenable(result)) {\n            then.call(result, resolve, reject);\n          } else resolve(result);\n        } else reject(value);\n      } catch (error) {\n        if (domain && !exited) domain.exit();\n        reject(error);\n      }\n    }\n    state.reactions = [];\n    state.notified = false;\n    if (isReject && !state.rejection) onUnhandled(promise, state);\n  });\n};\n\nvar dispatchEvent = function (name, promise, reason) {\n  var event, handler;\n  if (DISPATCH_EVENT) {\n    event = document.createEvent('Event');\n    event.promise = promise;\n    event.reason = reason;\n    event.initEvent(name, false, true);\n    global.dispatchEvent(event);\n  } else event = { promise: promise, reason: reason };\n  if (handler = global['on' + name]) handler(event);\n  else if (name === UNHANDLED_REJECTION) hostReportErrors('Unhandled promise rejection', reason);\n};\n\nvar onUnhandled = function (promise, state) {\n  task.call(global, function () {\n    var value = state.value;\n    var IS_UNHANDLED = isUnhandled(state);\n    var result;\n    if (IS_UNHANDLED) {\n      result = perform(function () {\n        if (IS_NODE) {\n          process.emit('unhandledRejection', value, promise);\n        } else dispatchEvent(UNHANDLED_REJECTION, promise, value);\n      });\n      // Browsers should not trigger `rejectionHandled` event if it was handled here, NodeJS - should\n      state.rejection = IS_NODE || isUnhandled(state) ? UNHANDLED : HANDLED;\n      if (result.error) throw result.value;\n    }\n  });\n};\n\nvar isUnhandled = function (state) {\n  return state.rejection !== HANDLED && !state.parent;\n};\n\nvar onHandleUnhandled = function (promise, state) {\n  task.call(global, function () {\n    if (IS_NODE) {\n      process.emit('rejectionHandled', promise);\n    } else dispatchEvent(REJECTION_HANDLED, promise, state.value);\n  });\n};\n\nvar bind = function (fn, promise, state, unwrap) {\n  return function (value) {\n    fn(promise, state, value, unwrap);\n  };\n};\n\nvar internalReject = function (promise, state, value, unwrap) {\n  if (state.done) return;\n  state.done = true;\n  if (unwrap) state = unwrap;\n  state.value = value;\n  state.state = REJECTED;\n  notify(promise, state, true);\n};\n\nvar internalResolve = function (promise, state, value, unwrap) {\n  if (state.done) return;\n  state.done = true;\n  if (unwrap) state = unwrap;\n  try {\n    if (promise === value) throw TypeError(\"Promise can't be resolved itself\");\n    var then = isThenable(value);\n    if (then) {\n      microtask(function () {\n        var wrapper = { done: false };\n        try {\n          then.call(value,\n            bind(internalResolve, promise, wrapper, state),\n            bind(internalReject, promise, wrapper, state)\n          );\n        } catch (error) {\n          internalReject(promise, wrapper, error, state);\n        }\n      });\n    } else {\n      state.value = value;\n      state.state = FULFILLED;\n      notify(promise, state, false);\n    }\n  } catch (error) {\n    internalReject(promise, { done: false }, error, state);\n  }\n};\n\n// constructor polyfill\nif (FORCED) {\n  // 25.4.3.1 Promise(executor)\n  PromiseConstructor = function Promise(executor) {\n    anInstance(this, PromiseConstructor, PROMISE);\n    aFunction(executor);\n    Internal.call(this);\n    var state = getInternalState(this);\n    try {\n      executor(bind(internalResolve, this, state), bind(internalReject, this, state));\n    } catch (error) {\n      internalReject(this, state, error);\n    }\n  };\n  // eslint-disable-next-line no-unused-vars\n  Internal = function Promise(executor) {\n    setInternalState(this, {\n      type: PROMISE,\n      done: false,\n      notified: false,\n      parent: false,\n      reactions: [],\n      rejection: false,\n      state: PENDING,\n      value: undefined\n    });\n  };\n  Internal.prototype = redefineAll(PromiseConstructor.prototype, {\n    // `Promise.prototype.then` method\n    // https://tc39.github.io/ecma262/#sec-promise.prototype.then\n    then: function then(onFulfilled, onRejected) {\n      var state = getInternalPromiseState(this);\n      var reaction = newPromiseCapability(speciesConstructor(this, PromiseConstructor));\n      reaction.ok = typeof onFulfilled == 'function' ? onFulfilled : true;\n      reaction.fail = typeof onRejected == 'function' && onRejected;\n      reaction.domain = IS_NODE ? process.domain : undefined;\n      state.parent = true;\n      state.reactions.push(reaction);\n      if (state.state != PENDING) notify(this, state, false);\n      return reaction.promise;\n    },\n    // `Promise.prototype.catch` method\n    // https://tc39.github.io/ecma262/#sec-promise.prototype.catch\n    'catch': function (onRejected) {\n      return this.then(undefined, onRejected);\n    }\n  });\n  OwnPromiseCapability = function () {\n    var promise = new Internal();\n    var state = getInternalState(promise);\n    this.promise = promise;\n    this.resolve = bind(internalResolve, promise, state);\n    this.reject = bind(internalReject, promise, state);\n  };\n  newPromiseCapabilityModule.f = newPromiseCapability = function (C) {\n    return C === PromiseConstructor || C === PromiseWrapper\n      ? new OwnPromiseCapability(C)\n      : newGenericPromiseCapability(C);\n  };\n\n  if (!IS_PURE && typeof NativePromise == 'function') {\n    nativeThen = NativePromise.prototype.then;\n\n    // wrap native Promise#then for native async functions\n    redefine(NativePromise.prototype, 'then', function then(onFulfilled, onRejected) {\n      var that = this;\n      return new PromiseConstructor(function (resolve, reject) {\n        nativeThen.call(that, resolve, reject);\n      }).then(onFulfilled, onRejected);\n    // https://github.com/zloirock/core-js/issues/640\n    }, { unsafe: true });\n\n    // wrap fetch result\n    if (typeof $fetch == 'function') $({ global: true, enumerable: true, forced: true }, {\n      // eslint-disable-next-line no-unused-vars\n      fetch: function fetch(input /* , init */) {\n        return promiseResolve(PromiseConstructor, $fetch.apply(global, arguments));\n      }\n    });\n  }\n}\n\n$({ global: true, wrap: true, forced: FORCED }, {\n  Promise: PromiseConstructor\n});\n\nsetToStringTag(PromiseConstructor, PROMISE, false, true);\nsetSpecies(PROMISE);\n\nPromiseWrapper = getBuiltIn(PROMISE);\n\n// statics\n$({ target: PROMISE, stat: true, forced: FORCED }, {\n  // `Promise.reject` method\n  // https://tc39.github.io/ecma262/#sec-promise.reject\n  reject: function reject(r) {\n    var capability = newPromiseCapability(this);\n    capability.reject.call(undefined, r);\n    return capability.promise;\n  }\n});\n\n$({ target: PROMISE, stat: true, forced: IS_PURE || FORCED }, {\n  // `Promise.resolve` method\n  // https://tc39.github.io/ecma262/#sec-promise.resolve\n  resolve: function resolve(x) {\n    return promiseResolve(IS_PURE && this === PromiseWrapper ? PromiseConstructor : this, x);\n  }\n});\n\n$({ target: PROMISE, stat: true, forced: INCORRECT_ITERATION }, {\n  // `Promise.all` method\n  // https://tc39.github.io/ecma262/#sec-promise.all\n  all: function all(iterable) {\n    var C = this;\n    var capability = newPromiseCapability(C);\n    var resolve = capability.resolve;\n    var reject = capability.reject;\n    var result = perform(function () {\n      var $promiseResolve = aFunction(C.resolve);\n      var values = [];\n      var counter = 0;\n      var remaining = 1;\n      iterate(iterable, function (promise) {\n        var index = counter++;\n        var alreadyCalled = false;\n        values.push(undefined);\n        remaining++;\n        $promiseResolve.call(C, promise).then(function (value) {\n          if (alreadyCalled) return;\n          alreadyCalled = true;\n          values[index] = value;\n          --remaining || resolve(values);\n        }, reject);\n      });\n      --remaining || resolve(values);\n    });\n    if (result.error) reject(result.value);\n    return capability.promise;\n  },\n  // `Promise.race` method\n  // https://tc39.github.io/ecma262/#sec-promise.race\n  race: function race(iterable) {\n    var C = this;\n    var capability = newPromiseCapability(C);\n    var reject = capability.reject;\n    var result = perform(function () {\n      var $promiseResolve = aFunction(C.resolve);\n      iterate(iterable, function (promise) {\n        $promiseResolve.call(C, promise).then(capability.resolve, reject);\n      });\n    });\n    if (result.error) reject(result.value);\n    return capability.promise;\n  }\n});\n","var $ = require('../internals/export');\nvar getBuiltIn = require('../internals/get-built-in');\nvar aFunction = require('../internals/a-function');\nvar anObject = require('../internals/an-object');\nvar fails = require('../internals/fails');\n\nvar nativeApply = getBuiltIn('Reflect', 'apply');\nvar functionApply = Function.apply;\n\n// MS Edge argumentsList argument is optional\nvar OPTIONAL_ARGUMENTS_LIST = !fails(function () {\n  nativeApply(function () { /* empty */ });\n});\n\n// `Reflect.apply` method\n// https://tc39.github.io/ecma262/#sec-reflect.apply\n$({ target: 'Reflect', stat: true, forced: OPTIONAL_ARGUMENTS_LIST }, {\n  apply: function apply(target, thisArgument, argumentsList) {\n    aFunction(target);\n    anObject(argumentsList);\n    return nativeApply\n      ? nativeApply(target, thisArgument, argumentsList)\n      : functionApply.call(target, thisArgument, argumentsList);\n  }\n});\n","var $ = require('../internals/export');\nvar getBuiltIn = require('../internals/get-built-in');\nvar aFunction = require('../internals/a-function');\nvar anObject = require('../internals/an-object');\nvar isObject = require('../internals/is-object');\nvar create = require('../internals/object-create');\nvar bind = require('../internals/function-bind');\nvar fails = require('../internals/fails');\n\nvar nativeConstruct = getBuiltIn('Reflect', 'construct');\n\n// `Reflect.construct` method\n// https://tc39.github.io/ecma262/#sec-reflect.construct\n// MS Edge supports only 2 arguments and argumentsList argument is optional\n// FF Nightly sets third argument as `new.target`, but does not create `this` from it\nvar NEW_TARGET_BUG = fails(function () {\n  function F() { /* empty */ }\n  return !(nativeConstruct(function () { /* empty */ }, [], F) instanceof F);\n});\nvar ARGS_BUG = !fails(function () {\n  nativeConstruct(function () { /* empty */ });\n});\nvar FORCED = NEW_TARGET_BUG || ARGS_BUG;\n\n$({ target: 'Reflect', stat: true, forced: FORCED, sham: FORCED }, {\n  construct: function construct(Target, args /* , newTarget */) {\n    aFunction(Target);\n    anObject(args);\n    var newTarget = arguments.length < 3 ? Target : aFunction(arguments[2]);\n    if (ARGS_BUG && !NEW_TARGET_BUG) return nativeConstruct(Target, args, newTarget);\n    if (Target == newTarget) {\n      // w/o altered newTarget, optimization for 0-4 arguments\n      switch (args.length) {\n        case 0: return new Target();\n        case 1: return new Target(args[0]);\n        case 2: return new Target(args[0], args[1]);\n        case 3: return new Target(args[0], args[1], args[2]);\n        case 4: return new Target(args[0], args[1], args[2], args[3]);\n      }\n      // w/o altered newTarget, lot of arguments case\n      var $args = [null];\n      $args.push.apply($args, args);\n      return new (bind.apply(Target, $args))();\n    }\n    // with altered newTarget, not support built-in constructors\n    var proto = newTarget.prototype;\n    var instance = create(isObject(proto) ? proto : Object.prototype);\n    var result = Function.apply.call(Target, instance, args);\n    return isObject(result) ? result : instance;\n  }\n});\n","var $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar anObject = require('../internals/an-object');\nvar toPrimitive = require('../internals/to-primitive');\nvar definePropertyModule = require('../internals/object-define-property');\nvar fails = require('../internals/fails');\n\n// MS Edge has broken Reflect.defineProperty - throwing instead of returning false\nvar ERROR_INSTEAD_OF_FALSE = fails(function () {\n  // eslint-disable-next-line no-undef\n  Reflect.defineProperty(definePropertyModule.f({}, 1, { value: 1 }), 1, { value: 2 });\n});\n\n// `Reflect.defineProperty` method\n// https://tc39.github.io/ecma262/#sec-reflect.defineproperty\n$({ target: 'Reflect', stat: true, forced: ERROR_INSTEAD_OF_FALSE, sham: !DESCRIPTORS }, {\n  defineProperty: function defineProperty(target, propertyKey, attributes) {\n    anObject(target);\n    var key = toPrimitive(propertyKey, true);\n    anObject(attributes);\n    try {\n      definePropertyModule.f(target, key, attributes);\n      return true;\n    } catch (error) {\n      return false;\n    }\n  }\n});\n","var $ = require('../internals/export');\nvar anObject = require('../internals/an-object');\nvar getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\n\n// `Reflect.deleteProperty` method\n// https://tc39.github.io/ecma262/#sec-reflect.deleteproperty\n$({ target: 'Reflect', stat: true }, {\n  deleteProperty: function deleteProperty(target, propertyKey) {\n    var descriptor = getOwnPropertyDescriptor(anObject(target), propertyKey);\n    return descriptor && !descriptor.configurable ? false : delete target[propertyKey];\n  }\n});\n","var $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar anObject = require('../internals/an-object');\nvar getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');\n\n// `Reflect.getOwnPropertyDescriptor` method\n// https://tc39.github.io/ecma262/#sec-reflect.getownpropertydescriptor\n$({ target: 'Reflect', stat: true, sham: !DESCRIPTORS }, {\n  getOwnPropertyDescriptor: function getOwnPropertyDescriptor(target, propertyKey) {\n    return getOwnPropertyDescriptorModule.f(anObject(target), propertyKey);\n  }\n});\n","var $ = require('../internals/export');\nvar anObject = require('../internals/an-object');\nvar objectGetPrototypeOf = require('../internals/object-get-prototype-of');\nvar CORRECT_PROTOTYPE_GETTER = require('../internals/correct-prototype-getter');\n\n// `Reflect.getPrototypeOf` method\n// https://tc39.github.io/ecma262/#sec-reflect.getprototypeof\n$({ target: 'Reflect', stat: true, sham: !CORRECT_PROTOTYPE_GETTER }, {\n  getPrototypeOf: function getPrototypeOf(target) {\n    return objectGetPrototypeOf(anObject(target));\n  }\n});\n","var $ = require('../internals/export');\nvar isObject = require('../internals/is-object');\nvar anObject = require('../internals/an-object');\nvar has = require('../internals/has');\nvar getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\n\n// `Reflect.get` method\n// https://tc39.github.io/ecma262/#sec-reflect.get\nfunction get(target, propertyKey /* , receiver */) {\n  var receiver = arguments.length < 3 ? target : arguments[2];\n  var descriptor, prototype;\n  if (anObject(target) === receiver) return target[propertyKey];\n  if (descriptor = getOwnPropertyDescriptorModule.f(target, propertyKey)) return has(descriptor, 'value')\n    ? descriptor.value\n    : descriptor.get === undefined\n      ? undefined\n      : descriptor.get.call(receiver);\n  if (isObject(prototype = getPrototypeOf(target))) return get(prototype, propertyKey, receiver);\n}\n\n$({ target: 'Reflect', stat: true }, {\n  get: get\n});\n","var $ = require('../internals/export');\n\n// `Reflect.has` method\n// https://tc39.github.io/ecma262/#sec-reflect.has\n$({ target: 'Reflect', stat: true }, {\n  has: function has(target, propertyKey) {\n    return propertyKey in target;\n  }\n});\n","var $ = require('../internals/export');\nvar anObject = require('../internals/an-object');\n\nvar objectIsExtensible = Object.isExtensible;\n\n// `Reflect.isExtensible` method\n// https://tc39.github.io/ecma262/#sec-reflect.isextensible\n$({ target: 'Reflect', stat: true }, {\n  isExtensible: function isExtensible(target) {\n    anObject(target);\n    return objectIsExtensible ? objectIsExtensible(target) : true;\n  }\n});\n","var $ = require('../internals/export');\nvar ownKeys = require('../internals/own-keys');\n\n// `Reflect.ownKeys` method\n// https://tc39.github.io/ecma262/#sec-reflect.ownkeys\n$({ target: 'Reflect', stat: true }, {\n  ownKeys: ownKeys\n});\n","var $ = require('../internals/export');\nvar getBuiltIn = require('../internals/get-built-in');\nvar anObject = require('../internals/an-object');\nvar FREEZING = require('../internals/freezing');\n\n// `Reflect.preventExtensions` method\n// https://tc39.github.io/ecma262/#sec-reflect.preventextensions\n$({ target: 'Reflect', stat: true, sham: !FREEZING }, {\n  preventExtensions: function preventExtensions(target) {\n    anObject(target);\n    try {\n      var objectPreventExtensions = getBuiltIn('Object', 'preventExtensions');\n      if (objectPreventExtensions) objectPreventExtensions(target);\n      return true;\n    } catch (error) {\n      return false;\n    }\n  }\n});\n","var $ = require('../internals/export');\nvar anObject = require('../internals/an-object');\nvar aPossiblePrototype = require('../internals/a-possible-prototype');\nvar objectSetPrototypeOf = require('../internals/object-set-prototype-of');\n\n// `Reflect.setPrototypeOf` method\n// https://tc39.github.io/ecma262/#sec-reflect.setprototypeof\nif (objectSetPrototypeOf) $({ target: 'Reflect', stat: true }, {\n  setPrototypeOf: function setPrototypeOf(target, proto) {\n    anObject(target);\n    aPossiblePrototype(proto);\n    try {\n      objectSetPrototypeOf(target, proto);\n      return true;\n    } catch (error) {\n      return false;\n    }\n  }\n});\n","var $ = require('../internals/export');\nvar anObject = require('../internals/an-object');\nvar isObject = require('../internals/is-object');\nvar has = require('../internals/has');\nvar fails = require('../internals/fails');\nvar definePropertyModule = require('../internals/object-define-property');\nvar getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\n\n// `Reflect.set` method\n// https://tc39.github.io/ecma262/#sec-reflect.set\nfunction set(target, propertyKey, V /* , receiver */) {\n  var receiver = arguments.length < 4 ? target : arguments[3];\n  var ownDescriptor = getOwnPropertyDescriptorModule.f(anObject(target), propertyKey);\n  var existingDescriptor, prototype;\n  if (!ownDescriptor) {\n    if (isObject(prototype = getPrototypeOf(target))) {\n      return set(prototype, propertyKey, V, receiver);\n    }\n    ownDescriptor = createPropertyDescriptor(0);\n  }\n  if (has(ownDescriptor, 'value')) {\n    if (ownDescriptor.writable === false || !isObject(receiver)) return false;\n    if (existingDescriptor = getOwnPropertyDescriptorModule.f(receiver, propertyKey)) {\n      if (existingDescriptor.get || existingDescriptor.set || existingDescriptor.writable === false) return false;\n      existingDescriptor.value = V;\n      definePropertyModule.f(receiver, propertyKey, existingDescriptor);\n    } else definePropertyModule.f(receiver, propertyKey, createPropertyDescriptor(0, V));\n    return true;\n  }\n  return ownDescriptor.set === undefined ? false : (ownDescriptor.set.call(receiver, V), true);\n}\n\n// MS Edge 17-18 Reflect.set allows setting the property to object\n// with non-writable property on the prototype\nvar MS_EDGE_BUG = fails(function () {\n  var object = definePropertyModule.f({}, 'a', { configurable: true });\n  // eslint-disable-next-line no-undef\n  return Reflect.set(getPrototypeOf(object), 'a', 1, object) !== false;\n});\n\n$({ target: 'Reflect', stat: true, forced: MS_EDGE_BUG }, {\n  set: set\n});\n","var DESCRIPTORS = require('../internals/descriptors');\nvar global = require('../internals/global');\nvar isForced = require('../internals/is-forced');\nvar inheritIfRequired = require('../internals/inherit-if-required');\nvar defineProperty = require('../internals/object-define-property').f;\nvar getOwnPropertyNames = require('../internals/object-get-own-property-names').f;\nvar isRegExp = require('../internals/is-regexp');\nvar getFlags = require('../internals/regexp-flags');\nvar stickyHelpers = require('../internals/regexp-sticky-helpers');\nvar redefine = require('../internals/redefine');\nvar fails = require('../internals/fails');\nvar setInternalState = require('../internals/internal-state').set;\nvar setSpecies = require('../internals/set-species');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar MATCH = wellKnownSymbol('match');\nvar NativeRegExp = global.RegExp;\nvar RegExpPrototype = NativeRegExp.prototype;\nvar re1 = /a/g;\nvar re2 = /a/g;\n\n// \"new\" should create a new object, old webkit bug\nvar CORRECT_NEW = new NativeRegExp(re1) !== re1;\n\nvar UNSUPPORTED_Y = stickyHelpers.UNSUPPORTED_Y;\n\nvar FORCED = DESCRIPTORS && isForced('RegExp', (!CORRECT_NEW || UNSUPPORTED_Y || fails(function () {\n  re2[MATCH] = false;\n  // RegExp constructor can alter flags and IsRegExp works correct with @@match\n  return NativeRegExp(re1) != re1 || NativeRegExp(re2) == re2 || NativeRegExp(re1, 'i') != '/a/i';\n})));\n\n// `RegExp` constructor\n// https://tc39.github.io/ecma262/#sec-regexp-constructor\nif (FORCED) {\n  var RegExpWrapper = function RegExp(pattern, flags) {\n    var thisIsRegExp = this instanceof RegExpWrapper;\n    var patternIsRegExp = isRegExp(pattern);\n    var flagsAreUndefined = flags === undefined;\n    var sticky;\n\n    if (!thisIsRegExp && patternIsRegExp && pattern.constructor === RegExpWrapper && flagsAreUndefined) {\n      return pattern;\n    }\n\n    if (CORRECT_NEW) {\n      if (patternIsRegExp && !flagsAreUndefined) pattern = pattern.source;\n    } else if (pattern instanceof RegExpWrapper) {\n      if (flagsAreUndefined) flags = getFlags.call(pattern);\n      pattern = pattern.source;\n    }\n\n    if (UNSUPPORTED_Y) {\n      sticky = !!flags && flags.indexOf('y') > -1;\n      if (sticky) flags = flags.replace(/y/g, '');\n    }\n\n    var result = inheritIfRequired(\n      CORRECT_NEW ? new NativeRegExp(pattern, flags) : NativeRegExp(pattern, flags),\n      thisIsRegExp ? this : RegExpPrototype,\n      RegExpWrapper\n    );\n\n    if (UNSUPPORTED_Y && sticky) setInternalState(result, { sticky: sticky });\n\n    return result;\n  };\n  var proxy = function (key) {\n    key in RegExpWrapper || defineProperty(RegExpWrapper, key, {\n      configurable: true,\n      get: function () { return NativeRegExp[key]; },\n      set: function (it) { NativeRegExp[key] = it; }\n    });\n  };\n  var keys = getOwnPropertyNames(NativeRegExp);\n  var index = 0;\n  while (keys.length > index) proxy(keys[index++]);\n  RegExpPrototype.constructor = RegExpWrapper;\n  RegExpWrapper.prototype = RegExpPrototype;\n  redefine(global, 'RegExp', RegExpWrapper);\n}\n\n// https://tc39.github.io/ecma262/#sec-get-regexp-@@species\nsetSpecies('RegExp');\n","'use strict';\nvar $ = require('../internals/export');\nvar exec = require('../internals/regexp-exec');\n\n$({ target: 'RegExp', proto: true, forced: /./.exec !== exec }, {\n  exec: exec\n});\n","var DESCRIPTORS = require('../internals/descriptors');\nvar objectDefinePropertyModule = require('../internals/object-define-property');\nvar regExpFlags = require('../internals/regexp-flags');\nvar UNSUPPORTED_Y = require('../internals/regexp-sticky-helpers').UNSUPPORTED_Y;\n\n// `RegExp.prototype.flags` getter\n// https://tc39.github.io/ecma262/#sec-get-regexp.prototype.flags\nif (DESCRIPTORS && (/./g.flags != 'g' || UNSUPPORTED_Y)) {\n  objectDefinePropertyModule.f(RegExp.prototype, 'flags', {\n    configurable: true,\n    get: regExpFlags\n  });\n}\n","'use strict';\nvar redefine = require('../internals/redefine');\nvar anObject = require('../internals/an-object');\nvar fails = require('../internals/fails');\nvar flags = require('../internals/regexp-flags');\n\nvar TO_STRING = 'toString';\nvar RegExpPrototype = RegExp.prototype;\nvar nativeToString = RegExpPrototype[TO_STRING];\n\nvar NOT_GENERIC = fails(function () { return nativeToString.call({ source: 'a', flags: 'b' }) != '/a/b'; });\n// FF44- RegExp#toString has a wrong name\nvar INCORRECT_NAME = nativeToString.name != TO_STRING;\n\n// `RegExp.prototype.toString` method\n// https://tc39.github.io/ecma262/#sec-regexp.prototype.tostring\nif (NOT_GENERIC || INCORRECT_NAME) {\n  redefine(RegExp.prototype, TO_STRING, function toString() {\n    var R = anObject(this);\n    var p = String(R.source);\n    var rf = R.flags;\n    var f = String(rf === undefined && R instanceof RegExp && !('flags' in RegExpPrototype) ? flags.call(R) : rf);\n    return '/' + p + '/' + f;\n  }, { unsafe: true });\n}\n","'use strict';\nvar collection = require('../internals/collection');\nvar collectionStrong = require('../internals/collection-strong');\n\n// `Set` constructor\n// https://tc39.github.io/ecma262/#sec-set-objects\nmodule.exports = collection('Set', function (init) {\n  return function Set() { return init(this, arguments.length ? arguments[0] : undefined); };\n}, collectionStrong);\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.anchor` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.anchor\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('anchor') }, {\n  anchor: function anchor(name) {\n    return createHTML(this, 'a', 'name', name);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.big` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.big\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('big') }, {\n  big: function big() {\n    return createHTML(this, 'big', '', '');\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.blink` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.blink\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('blink') }, {\n  blink: function blink() {\n    return createHTML(this, 'blink', '', '');\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.bold` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.bold\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('bold') }, {\n  bold: function bold() {\n    return createHTML(this, 'b', '', '');\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar codeAt = require('../internals/string-multibyte').codeAt;\n\n// `String.prototype.codePointAt` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.codepointat\n$({ target: 'String', proto: true }, {\n  codePointAt: function codePointAt(pos) {\n    return codeAt(this, pos);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\nvar toLength = require('../internals/to-length');\nvar notARegExp = require('../internals/not-a-regexp');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar correctIsRegExpLogic = require('../internals/correct-is-regexp-logic');\nvar IS_PURE = require('../internals/is-pure');\n\nvar nativeEndsWith = ''.endsWith;\nvar min = Math.min;\n\nvar CORRECT_IS_REGEXP_LOGIC = correctIsRegExpLogic('endsWith');\n// https://github.com/zloirock/core-js/pull/702\nvar MDN_POLYFILL_BUG = !IS_PURE && !CORRECT_IS_REGEXP_LOGIC && !!function () {\n  var descriptor = getOwnPropertyDescriptor(String.prototype, 'endsWith');\n  return descriptor && !descriptor.writable;\n}();\n\n// `String.prototype.endsWith` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.endswith\n$({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG && !CORRECT_IS_REGEXP_LOGIC }, {\n  endsWith: function endsWith(searchString /* , endPosition = @length */) {\n    var that = String(requireObjectCoercible(this));\n    notARegExp(searchString);\n    var endPosition = arguments.length > 1 ? arguments[1] : undefined;\n    var len = toLength(that.length);\n    var end = endPosition === undefined ? len : min(toLength(endPosition), len);\n    var search = String(searchString);\n    return nativeEndsWith\n      ? nativeEndsWith.call(that, search, end)\n      : that.slice(end - search.length, end) === search;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.fixed` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.fixed\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('fixed') }, {\n  fixed: function fixed() {\n    return createHTML(this, 'tt', '', '');\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.fontcolor` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.fontcolor\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('fontcolor') }, {\n  fontcolor: function fontcolor(color) {\n    return createHTML(this, 'font', 'color', color);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.fontsize` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.fontsize\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('fontsize') }, {\n  fontsize: function fontsize(size) {\n    return createHTML(this, 'font', 'size', size);\n  }\n});\n","var $ = require('../internals/export');\nvar toAbsoluteIndex = require('../internals/to-absolute-index');\n\nvar fromCharCode = String.fromCharCode;\nvar nativeFromCodePoint = String.fromCodePoint;\n\n// length should be 1, old FF problem\nvar INCORRECT_LENGTH = !!nativeFromCodePoint && nativeFromCodePoint.length != 1;\n\n// `String.fromCodePoint` method\n// https://tc39.github.io/ecma262/#sec-string.fromcodepoint\n$({ target: 'String', stat: true, forced: INCORRECT_LENGTH }, {\n  fromCodePoint: function fromCodePoint(x) { // eslint-disable-line no-unused-vars\n    var elements = [];\n    var length = arguments.length;\n    var i = 0;\n    var code;\n    while (length > i) {\n      code = +arguments[i++];\n      if (toAbsoluteIndex(code, 0x10FFFF) !== code) throw RangeError(code + ' is not a valid code point');\n      elements.push(code < 0x10000\n        ? fromCharCode(code)\n        : fromCharCode(((code -= 0x10000) >> 10) + 0xD800, code % 0x400 + 0xDC00)\n      );\n    } return elements.join('');\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar notARegExp = require('../internals/not-a-regexp');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar correctIsRegExpLogic = require('../internals/correct-is-regexp-logic');\n\n// `String.prototype.includes` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.includes\n$({ target: 'String', proto: true, forced: !correctIsRegExpLogic('includes') }, {\n  includes: function includes(searchString /* , position = 0 */) {\n    return !!~String(requireObjectCoercible(this))\n      .indexOf(notARegExp(searchString), arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.italics` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.italics\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('italics') }, {\n  italics: function italics() {\n    return createHTML(this, 'i', '', '');\n  }\n});\n","'use strict';\nvar charAt = require('../internals/string-multibyte').charAt;\nvar InternalStateModule = require('../internals/internal-state');\nvar defineIterator = require('../internals/define-iterator');\n\nvar STRING_ITERATOR = 'String Iterator';\nvar setInternalState = InternalStateModule.set;\nvar getInternalState = InternalStateModule.getterFor(STRING_ITERATOR);\n\n// `String.prototype[@@iterator]` method\n// https://tc39.github.io/ecma262/#sec-string.prototype-@@iterator\ndefineIterator(String, 'String', function (iterated) {\n  setInternalState(this, {\n    type: STRING_ITERATOR,\n    string: String(iterated),\n    index: 0\n  });\n// `%StringIteratorPrototype%.next` method\n// https://tc39.github.io/ecma262/#sec-%stringiteratorprototype%.next\n}, function next() {\n  var state = getInternalState(this);\n  var string = state.string;\n  var index = state.index;\n  var point;\n  if (index >= string.length) return { value: undefined, done: true };\n  point = charAt(string, index);\n  state.index += point.length;\n  return { value: point, done: false };\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.link` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.link\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('link') }, {\n  link: function link(url) {\n    return createHTML(this, 'a', 'href', url);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createIteratorConstructor = require('../internals/create-iterator-constructor');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar toLength = require('../internals/to-length');\nvar aFunction = require('../internals/a-function');\nvar anObject = require('../internals/an-object');\nvar classof = require('../internals/classof-raw');\nvar isRegExp = require('../internals/is-regexp');\nvar getRegExpFlags = require('../internals/regexp-flags');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar fails = require('../internals/fails');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar speciesConstructor = require('../internals/species-constructor');\nvar advanceStringIndex = require('../internals/advance-string-index');\nvar InternalStateModule = require('../internals/internal-state');\nvar IS_PURE = require('../internals/is-pure');\n\nvar MATCH_ALL = wellKnownSymbol('matchAll');\nvar REGEXP_STRING = 'RegExp String';\nvar REGEXP_STRING_ITERATOR = REGEXP_STRING + ' Iterator';\nvar setInternalState = InternalStateModule.set;\nvar getInternalState = InternalStateModule.getterFor(REGEXP_STRING_ITERATOR);\nvar RegExpPrototype = RegExp.prototype;\nvar regExpBuiltinExec = RegExpPrototype.exec;\nvar nativeMatchAll = ''.matchAll;\n\nvar WORKS_WITH_NON_GLOBAL_REGEX = !!nativeMatchAll && !fails(function () {\n  'a'.matchAll(/./);\n});\n\nvar regExpExec = function (R, S) {\n  var exec = R.exec;\n  var result;\n  if (typeof exec == 'function') {\n    result = exec.call(R, S);\n    if (typeof result != 'object') throw TypeError('Incorrect exec result');\n    return result;\n  } return regExpBuiltinExec.call(R, S);\n};\n\n// eslint-disable-next-line max-len\nvar $RegExpStringIterator = createIteratorConstructor(function RegExpStringIterator(regexp, string, global, fullUnicode) {\n  setInternalState(this, {\n    type: REGEXP_STRING_ITERATOR,\n    regexp: regexp,\n    string: string,\n    global: global,\n    unicode: fullUnicode,\n    done: false\n  });\n}, REGEXP_STRING, function next() {\n  var state = getInternalState(this);\n  if (state.done) return { value: undefined, done: true };\n  var R = state.regexp;\n  var S = state.string;\n  var match = regExpExec(R, S);\n  if (match === null) return { value: undefined, done: state.done = true };\n  if (state.global) {\n    if (String(match[0]) == '') R.lastIndex = advanceStringIndex(S, toLength(R.lastIndex), state.unicode);\n    return { value: match, done: false };\n  }\n  state.done = true;\n  return { value: match, done: false };\n});\n\nvar $matchAll = function (string) {\n  var R = anObject(this);\n  var S = String(string);\n  var C, flagsValue, flags, matcher, global, fullUnicode;\n  C = speciesConstructor(R, RegExp);\n  flagsValue = R.flags;\n  if (flagsValue === undefined && R instanceof RegExp && !('flags' in RegExpPrototype)) {\n    flagsValue = getRegExpFlags.call(R);\n  }\n  flags = flagsValue === undefined ? '' : String(flagsValue);\n  matcher = new C(C === RegExp ? R.source : R, flags);\n  global = !!~flags.indexOf('g');\n  fullUnicode = !!~flags.indexOf('u');\n  matcher.lastIndex = toLength(R.lastIndex);\n  return new $RegExpStringIterator(matcher, S, global, fullUnicode);\n};\n\n// `String.prototype.matchAll` method\n// https://github.com/tc39/proposal-string-matchall\n$({ target: 'String', proto: true, forced: WORKS_WITH_NON_GLOBAL_REGEX }, {\n  matchAll: function matchAll(regexp) {\n    var O = requireObjectCoercible(this);\n    var flags, S, matcher, rx;\n    if (regexp != null) {\n      if (isRegExp(regexp)) {\n        flags = String(requireObjectCoercible('flags' in RegExpPrototype\n          ? regexp.flags\n          : getRegExpFlags.call(regexp)\n        ));\n        if (!~flags.indexOf('g')) throw TypeError('`.matchAll` does not allow non-global regexes');\n      }\n      if (WORKS_WITH_NON_GLOBAL_REGEX) return nativeMatchAll.apply(O, arguments);\n      matcher = regexp[MATCH_ALL];\n      if (matcher === undefined && IS_PURE && classof(regexp) == 'RegExp') matcher = $matchAll;\n      if (matcher != null) return aFunction(matcher).call(regexp, O);\n    } else if (WORKS_WITH_NON_GLOBAL_REGEX) return nativeMatchAll.apply(O, arguments);\n    S = String(O);\n    rx = new RegExp(regexp, 'g');\n    return IS_PURE ? $matchAll.call(rx, S) : rx[MATCH_ALL](S);\n  }\n});\n\nIS_PURE || MATCH_ALL in RegExpPrototype || createNonEnumerableProperty(RegExpPrototype, MATCH_ALL, $matchAll);\n","'use strict';\nvar fixRegExpWellKnownSymbolLogic = require('../internals/fix-regexp-well-known-symbol-logic');\nvar anObject = require('../internals/an-object');\nvar toLength = require('../internals/to-length');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar advanceStringIndex = require('../internals/advance-string-index');\nvar regExpExec = require('../internals/regexp-exec-abstract');\n\n// @@match logic\nfixRegExpWellKnownSymbolLogic('match', 1, function (MATCH, nativeMatch, maybeCallNative) {\n  return [\n    // `String.prototype.match` method\n    // https://tc39.github.io/ecma262/#sec-string.prototype.match\n    function match(regexp) {\n      var O = requireObjectCoercible(this);\n      var matcher = regexp == undefined ? undefined : regexp[MATCH];\n      return matcher !== undefined ? matcher.call(regexp, O) : new RegExp(regexp)[MATCH](String(O));\n    },\n    // `RegExp.prototype[@@match]` method\n    // https://tc39.github.io/ecma262/#sec-regexp.prototype-@@match\n    function (regexp) {\n      var res = maybeCallNative(nativeMatch, regexp, this);\n      if (res.done) return res.value;\n\n      var rx = anObject(regexp);\n      var S = String(this);\n\n      if (!rx.global) return regExpExec(rx, S);\n\n      var fullUnicode = rx.unicode;\n      rx.lastIndex = 0;\n      var A = [];\n      var n = 0;\n      var result;\n      while ((result = regExpExec(rx, S)) !== null) {\n        var matchStr = String(result[0]);\n        A[n] = matchStr;\n        if (matchStr === '') rx.lastIndex = advanceStringIndex(S, toLength(rx.lastIndex), fullUnicode);\n        n++;\n      }\n      return n === 0 ? null : A;\n    }\n  ];\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $padEnd = require('../internals/string-pad').end;\nvar WEBKIT_BUG = require('../internals/string-pad-webkit-bug');\n\n// `String.prototype.padEnd` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.padend\n$({ target: 'String', proto: true, forced: WEBKIT_BUG }, {\n  padEnd: function padEnd(maxLength /* , fillString = ' ' */) {\n    return $padEnd(this, maxLength, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $padStart = require('../internals/string-pad').start;\nvar WEBKIT_BUG = require('../internals/string-pad-webkit-bug');\n\n// `String.prototype.padStart` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.padstart\n$({ target: 'String', proto: true, forced: WEBKIT_BUG }, {\n  padStart: function padStart(maxLength /* , fillString = ' ' */) {\n    return $padStart(this, maxLength, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n","var $ = require('../internals/export');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar toLength = require('../internals/to-length');\n\n// `String.raw` method\n// https://tc39.github.io/ecma262/#sec-string.raw\n$({ target: 'String', stat: true }, {\n  raw: function raw(template) {\n    var rawTemplate = toIndexedObject(template.raw);\n    var literalSegments = toLength(rawTemplate.length);\n    var argumentsLength = arguments.length;\n    var elements = [];\n    var i = 0;\n    while (literalSegments > i) {\n      elements.push(String(rawTemplate[i++]));\n      if (i < argumentsLength) elements.push(String(arguments[i]));\n    } return elements.join('');\n  }\n});\n","var $ = require('../internals/export');\nvar repeat = require('../internals/string-repeat');\n\n// `String.prototype.repeat` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.repeat\n$({ target: 'String', proto: true }, {\n  repeat: repeat\n});\n","'use strict';\nvar fixRegExpWellKnownSymbolLogic = require('../internals/fix-regexp-well-known-symbol-logic');\nvar anObject = require('../internals/an-object');\nvar toObject = require('../internals/to-object');\nvar toLength = require('../internals/to-length');\nvar toInteger = require('../internals/to-integer');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar advanceStringIndex = require('../internals/advance-string-index');\nvar regExpExec = require('../internals/regexp-exec-abstract');\n\nvar max = Math.max;\nvar min = Math.min;\nvar floor = Math.floor;\nvar SUBSTITUTION_SYMBOLS = /\\$([$&'`]|\\d\\d?|<[^>]*>)/g;\nvar SUBSTITUTION_SYMBOLS_NO_NAMED = /\\$([$&'`]|\\d\\d?)/g;\n\nvar maybeToString = function (it) {\n  return it === undefined ? it : String(it);\n};\n\n// @@replace logic\nfixRegExpWellKnownSymbolLogic('replace', 2, function (REPLACE, nativeReplace, maybeCallNative, reason) {\n  var REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE = reason.REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE;\n  var REPLACE_KEEPS_$0 = reason.REPLACE_KEEPS_$0;\n  var UNSAFE_SUBSTITUTE = REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE ? '$' : '$0';\n\n  return [\n    // `String.prototype.replace` method\n    // https://tc39.github.io/ecma262/#sec-string.prototype.replace\n    function replace(searchValue, replaceValue) {\n      var O = requireObjectCoercible(this);\n      var replacer = searchValue == undefined ? undefined : searchValue[REPLACE];\n      return replacer !== undefined\n        ? replacer.call(searchValue, O, replaceValue)\n        : nativeReplace.call(String(O), searchValue, replaceValue);\n    },\n    // `RegExp.prototype[@@replace]` method\n    // https://tc39.github.io/ecma262/#sec-regexp.prototype-@@replace\n    function (regexp, replaceValue) {\n      if (\n        (!REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE && REPLACE_KEEPS_$0) ||\n        (typeof replaceValue === 'string' && replaceValue.indexOf(UNSAFE_SUBSTITUTE) === -1)\n      ) {\n        var res = maybeCallNative(nativeReplace, regexp, this, replaceValue);\n        if (res.done) return res.value;\n      }\n\n      var rx = anObject(regexp);\n      var S = String(this);\n\n      var functionalReplace = typeof replaceValue === 'function';\n      if (!functionalReplace) replaceValue = String(replaceValue);\n\n      var global = rx.global;\n      if (global) {\n        var fullUnicode = rx.unicode;\n        rx.lastIndex = 0;\n      }\n      var results = [];\n      while (true) {\n        var result = regExpExec(rx, S);\n        if (result === null) break;\n\n        results.push(result);\n        if (!global) break;\n\n        var matchStr = String(result[0]);\n        if (matchStr === '') rx.lastIndex = advanceStringIndex(S, toLength(rx.lastIndex), fullUnicode);\n      }\n\n      var accumulatedResult = '';\n      var nextSourcePosition = 0;\n      for (var i = 0; i < results.length; i++) {\n        result = results[i];\n\n        var matched = String(result[0]);\n        var position = max(min(toInteger(result.index), S.length), 0);\n        var captures = [];\n        // NOTE: This is equivalent to\n        //   captures = result.slice(1).map(maybeToString)\n        // but for some reason `nativeSlice.call(result, 1, result.length)` (called in\n        // the slice polyfill when slicing native arrays) \"doesn't work\" in safari 9 and\n        // causes a crash (https://pastebin.com/N21QzeQA) when trying to debug it.\n        for (var j = 1; j < result.length; j++) captures.push(maybeToString(result[j]));\n        var namedCaptures = result.groups;\n        if (functionalReplace) {\n          var replacerArgs = [matched].concat(captures, position, S);\n          if (namedCaptures !== undefined) replacerArgs.push(namedCaptures);\n          var replacement = String(replaceValue.apply(undefined, replacerArgs));\n        } else {\n          replacement = getSubstitution(matched, S, position, captures, namedCaptures, replaceValue);\n        }\n        if (position >= nextSourcePosition) {\n          accumulatedResult += S.slice(nextSourcePosition, position) + replacement;\n          nextSourcePosition = position + matched.length;\n        }\n      }\n      return accumulatedResult + S.slice(nextSourcePosition);\n    }\n  ];\n\n  // https://tc39.github.io/ecma262/#sec-getsubstitution\n  function getSubstitution(matched, str, position, captures, namedCaptures, replacement) {\n    var tailPos = position + matched.length;\n    var m = captures.length;\n    var symbols = SUBSTITUTION_SYMBOLS_NO_NAMED;\n    if (namedCaptures !== undefined) {\n      namedCaptures = toObject(namedCaptures);\n      symbols = SUBSTITUTION_SYMBOLS;\n    }\n    return nativeReplace.call(replacement, symbols, function (match, ch) {\n      var capture;\n      switch (ch.charAt(0)) {\n        case '$': return '$';\n        case '&': return matched;\n        case '`': return str.slice(0, position);\n        case \"'\": return str.slice(tailPos);\n        case '<':\n          capture = namedCaptures[ch.slice(1, -1)];\n          break;\n        default: // \\d\\d?\n          var n = +ch;\n          if (n === 0) return match;\n          if (n > m) {\n            var f = floor(n / 10);\n            if (f === 0) return match;\n            if (f <= m) return captures[f - 1] === undefined ? ch.charAt(1) : captures[f - 1] + ch.charAt(1);\n            return match;\n          }\n          capture = captures[n - 1];\n      }\n      return capture === undefined ? '' : capture;\n    });\n  }\n});\n","'use strict';\nvar fixRegExpWellKnownSymbolLogic = require('../internals/fix-regexp-well-known-symbol-logic');\nvar anObject = require('../internals/an-object');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar sameValue = require('../internals/same-value');\nvar regExpExec = require('../internals/regexp-exec-abstract');\n\n// @@search logic\nfixRegExpWellKnownSymbolLogic('search', 1, function (SEARCH, nativeSearch, maybeCallNative) {\n  return [\n    // `String.prototype.search` method\n    // https://tc39.github.io/ecma262/#sec-string.prototype.search\n    function search(regexp) {\n      var O = requireObjectCoercible(this);\n      var searcher = regexp == undefined ? undefined : regexp[SEARCH];\n      return searcher !== undefined ? searcher.call(regexp, O) : new RegExp(regexp)[SEARCH](String(O));\n    },\n    // `RegExp.prototype[@@search]` method\n    // https://tc39.github.io/ecma262/#sec-regexp.prototype-@@search\n    function (regexp) {\n      var res = maybeCallNative(nativeSearch, regexp, this);\n      if (res.done) return res.value;\n\n      var rx = anObject(regexp);\n      var S = String(this);\n\n      var previousLastIndex = rx.lastIndex;\n      if (!sameValue(previousLastIndex, 0)) rx.lastIndex = 0;\n      var result = regExpExec(rx, S);\n      if (!sameValue(rx.lastIndex, previousLastIndex)) rx.lastIndex = previousLastIndex;\n      return result === null ? -1 : result.index;\n    }\n  ];\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.small` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.small\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('small') }, {\n  small: function small() {\n    return createHTML(this, 'small', '', '');\n  }\n});\n","'use strict';\nvar fixRegExpWellKnownSymbolLogic = require('../internals/fix-regexp-well-known-symbol-logic');\nvar isRegExp = require('../internals/is-regexp');\nvar anObject = require('../internals/an-object');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar speciesConstructor = require('../internals/species-constructor');\nvar advanceStringIndex = require('../internals/advance-string-index');\nvar toLength = require('../internals/to-length');\nvar callRegExpExec = require('../internals/regexp-exec-abstract');\nvar regexpExec = require('../internals/regexp-exec');\nvar fails = require('../internals/fails');\n\nvar arrayPush = [].push;\nvar min = Math.min;\nvar MAX_UINT32 = 0xFFFFFFFF;\n\n// babel-minify transpiles RegExp('x', 'y') -> /x/y and it causes SyntaxError\nvar SUPPORTS_Y = !fails(function () { return !RegExp(MAX_UINT32, 'y'); });\n\n// @@split logic\nfixRegExpWellKnownSymbolLogic('split', 2, function (SPLIT, nativeSplit, maybeCallNative) {\n  var internalSplit;\n  if (\n    'abbc'.split(/(b)*/)[1] == 'c' ||\n    'test'.split(/(?:)/, -1).length != 4 ||\n    'ab'.split(/(?:ab)*/).length != 2 ||\n    '.'.split(/(.?)(.?)/).length != 4 ||\n    '.'.split(/()()/).length > 1 ||\n    ''.split(/.?/).length\n  ) {\n    // based on es5-shim implementation, need to rework it\n    internalSplit = function (separator, limit) {\n      var string = String(requireObjectCoercible(this));\n      var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;\n      if (lim === 0) return [];\n      if (separator === undefined) return [string];\n      // If `separator` is not a regex, use native split\n      if (!isRegExp(separator)) {\n        return nativeSplit.call(string, separator, lim);\n      }\n      var output = [];\n      var flags = (separator.ignoreCase ? 'i' : '') +\n                  (separator.multiline ? 'm' : '') +\n                  (separator.unicode ? 'u' : '') +\n                  (separator.sticky ? 'y' : '');\n      var lastLastIndex = 0;\n      // Make `global` and avoid `lastIndex` issues by working with a copy\n      var separatorCopy = new RegExp(separator.source, flags + 'g');\n      var match, lastIndex, lastLength;\n      while (match = regexpExec.call(separatorCopy, string)) {\n        lastIndex = separatorCopy.lastIndex;\n        if (lastIndex > lastLastIndex) {\n          output.push(string.slice(lastLastIndex, match.index));\n          if (match.length > 1 && match.index < string.length) arrayPush.apply(output, match.slice(1));\n          lastLength = match[0].length;\n          lastLastIndex = lastIndex;\n          if (output.length >= lim) break;\n        }\n        if (separatorCopy.lastIndex === match.index) separatorCopy.lastIndex++; // Avoid an infinite loop\n      }\n      if (lastLastIndex === string.length) {\n        if (lastLength || !separatorCopy.test('')) output.push('');\n      } else output.push(string.slice(lastLastIndex));\n      return output.length > lim ? output.slice(0, lim) : output;\n    };\n  // Chakra, V8\n  } else if ('0'.split(undefined, 0).length) {\n    internalSplit = function (separator, limit) {\n      return separator === undefined && limit === 0 ? [] : nativeSplit.call(this, separator, limit);\n    };\n  } else internalSplit = nativeSplit;\n\n  return [\n    // `String.prototype.split` method\n    // https://tc39.github.io/ecma262/#sec-string.prototype.split\n    function split(separator, limit) {\n      var O = requireObjectCoercible(this);\n      var splitter = separator == undefined ? undefined : separator[SPLIT];\n      return splitter !== undefined\n        ? splitter.call(separator, O, limit)\n        : internalSplit.call(String(O), separator, limit);\n    },\n    // `RegExp.prototype[@@split]` method\n    // https://tc39.github.io/ecma262/#sec-regexp.prototype-@@split\n    //\n    // NOTE: This cannot be properly polyfilled in engines that don't support\n    // the 'y' flag.\n    function (regexp, limit) {\n      var res = maybeCallNative(internalSplit, regexp, this, limit, internalSplit !== nativeSplit);\n      if (res.done) return res.value;\n\n      var rx = anObject(regexp);\n      var S = String(this);\n      var C = speciesConstructor(rx, RegExp);\n\n      var unicodeMatching = rx.unicode;\n      var flags = (rx.ignoreCase ? 'i' : '') +\n                  (rx.multiline ? 'm' : '') +\n                  (rx.unicode ? 'u' : '') +\n                  (SUPPORTS_Y ? 'y' : 'g');\n\n      // ^(? + rx + ) is needed, in combination with some S slicing, to\n      // simulate the 'y' flag.\n      var splitter = new C(SUPPORTS_Y ? rx : '^(?:' + rx.source + ')', flags);\n      var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;\n      if (lim === 0) return [];\n      if (S.length === 0) return callRegExpExec(splitter, S) === null ? [S] : [];\n      var p = 0;\n      var q = 0;\n      var A = [];\n      while (q < S.length) {\n        splitter.lastIndex = SUPPORTS_Y ? q : 0;\n        var z = callRegExpExec(splitter, SUPPORTS_Y ? S : S.slice(q));\n        var e;\n        if (\n          z === null ||\n          (e = min(toLength(splitter.lastIndex + (SUPPORTS_Y ? 0 : q)), S.length)) === p\n        ) {\n          q = advanceStringIndex(S, q, unicodeMatching);\n        } else {\n          A.push(S.slice(p, q));\n          if (A.length === lim) return A;\n          for (var i = 1; i <= z.length - 1; i++) {\n            A.push(z[i]);\n            if (A.length === lim) return A;\n          }\n          q = p = e;\n        }\n      }\n      A.push(S.slice(p));\n      return A;\n    }\n  ];\n}, !SUPPORTS_Y);\n","'use strict';\nvar $ = require('../internals/export');\nvar getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\nvar toLength = require('../internals/to-length');\nvar notARegExp = require('../internals/not-a-regexp');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar correctIsRegExpLogic = require('../internals/correct-is-regexp-logic');\nvar IS_PURE = require('../internals/is-pure');\n\nvar nativeStartsWith = ''.startsWith;\nvar min = Math.min;\n\nvar CORRECT_IS_REGEXP_LOGIC = correctIsRegExpLogic('startsWith');\n// https://github.com/zloirock/core-js/pull/702\nvar MDN_POLYFILL_BUG = !IS_PURE && !CORRECT_IS_REGEXP_LOGIC && !!function () {\n  var descriptor = getOwnPropertyDescriptor(String.prototype, 'startsWith');\n  return descriptor && !descriptor.writable;\n}();\n\n// `String.prototype.startsWith` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.startswith\n$({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG && !CORRECT_IS_REGEXP_LOGIC }, {\n  startsWith: function startsWith(searchString /* , position = 0 */) {\n    var that = String(requireObjectCoercible(this));\n    notARegExp(searchString);\n    var index = toLength(min(arguments.length > 1 ? arguments[1] : undefined, that.length));\n    var search = String(searchString);\n    return nativeStartsWith\n      ? nativeStartsWith.call(that, search, index)\n      : that.slice(index, index + search.length) === search;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.strike` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.strike\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('strike') }, {\n  strike: function strike() {\n    return createHTML(this, 'strike', '', '');\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.sub` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.sub\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('sub') }, {\n  sub: function sub() {\n    return createHTML(this, 'sub', '', '');\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createHTML = require('../internals/create-html');\nvar forcedStringHTMLMethod = require('../internals/string-html-forced');\n\n// `String.prototype.sup` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.sup\n$({ target: 'String', proto: true, forced: forcedStringHTMLMethod('sup') }, {\n  sup: function sup() {\n    return createHTML(this, 'sup', '', '');\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $trimEnd = require('../internals/string-trim').end;\nvar forcedStringTrimMethod = require('../internals/string-trim-forced');\n\nvar FORCED = forcedStringTrimMethod('trimEnd');\n\nvar trimEnd = FORCED ? function trimEnd() {\n  return $trimEnd(this);\n} : ''.trimEnd;\n\n// `String.prototype.{ trimEnd, trimRight }` methods\n// https://github.com/tc39/ecmascript-string-left-right-trim\n$({ target: 'String', proto: true, forced: FORCED }, {\n  trimEnd: trimEnd,\n  trimRight: trimEnd\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $trimStart = require('../internals/string-trim').start;\nvar forcedStringTrimMethod = require('../internals/string-trim-forced');\n\nvar FORCED = forcedStringTrimMethod('trimStart');\n\nvar trimStart = FORCED ? function trimStart() {\n  return $trimStart(this);\n} : ''.trimStart;\n\n// `String.prototype.{ trimStart, trimLeft }` methods\n// https://github.com/tc39/ecmascript-string-left-right-trim\n$({ target: 'String', proto: true, forced: FORCED }, {\n  trimStart: trimStart,\n  trimLeft: trimStart\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar $trim = require('../internals/string-trim').trim;\nvar forcedStringTrimMethod = require('../internals/string-trim-forced');\n\n// `String.prototype.trim` method\n// https://tc39.github.io/ecma262/#sec-string.prototype.trim\n$({ target: 'String', proto: true, forced: forcedStringTrimMethod('trim') }, {\n  trim: function trim() {\n    return $trim(this);\n  }\n});\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.asyncIterator` well-known symbol\n// https://tc39.github.io/ecma262/#sec-symbol.asynciterator\ndefineWellKnownSymbol('asyncIterator');\n","// `Symbol.prototype.description` getter\n// https://tc39.github.io/ecma262/#sec-symbol.prototype.description\n'use strict';\nvar $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar global = require('../internals/global');\nvar has = require('../internals/has');\nvar isObject = require('../internals/is-object');\nvar defineProperty = require('../internals/object-define-property').f;\nvar copyConstructorProperties = require('../internals/copy-constructor-properties');\n\nvar NativeSymbol = global.Symbol;\n\nif (DESCRIPTORS && typeof NativeSymbol == 'function' && (!('description' in NativeSymbol.prototype) ||\n  // Safari 12 bug\n  NativeSymbol().description !== undefined\n)) {\n  var EmptyStringDescriptionStore = {};\n  // wrap Symbol constructor for correct work with undefined description\n  var SymbolWrapper = function Symbol() {\n    var description = arguments.length < 1 || arguments[0] === undefined ? undefined : String(arguments[0]);\n    var result = this instanceof SymbolWrapper\n      ? new NativeSymbol(description)\n      // in Edge 13, String(Symbol(undefined)) === 'Symbol(undefined)'\n      : description === undefined ? NativeSymbol() : NativeSymbol(description);\n    if (description === '') EmptyStringDescriptionStore[result] = true;\n    return result;\n  };\n  copyConstructorProperties(SymbolWrapper, NativeSymbol);\n  var symbolPrototype = SymbolWrapper.prototype = NativeSymbol.prototype;\n  symbolPrototype.constructor = SymbolWrapper;\n\n  var symbolToString = symbolPrototype.toString;\n  var native = String(NativeSymbol('test')) == 'Symbol(test)';\n  var regexp = /^Symbol\\((.*)\\)[^)]+$/;\n  defineProperty(symbolPrototype, 'description', {\n    configurable: true,\n    get: function description() {\n      var symbol = isObject(this) ? this.valueOf() : this;\n      var string = symbolToString.call(symbol);\n      if (has(EmptyStringDescriptionStore, symbol)) return '';\n      var desc = native ? string.slice(7, -1) : string.replace(regexp, '$1');\n      return desc === '' ? undefined : desc;\n    }\n  });\n\n  $({ global: true, forced: true }, {\n    Symbol: SymbolWrapper\n  });\n}\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.hasInstance` well-known symbol\n// https://tc39.github.io/ecma262/#sec-symbol.hasinstance\ndefineWellKnownSymbol('hasInstance');\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.isConcatSpreadable` well-known symbol\n// https://tc39.github.io/ecma262/#sec-symbol.isconcatspreadable\ndefineWellKnownSymbol('isConcatSpreadable');\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.iterator` well-known symbol\n// https://tc39.github.io/ecma262/#sec-symbol.iterator\ndefineWellKnownSymbol('iterator');\n","'use strict';\nvar $ = require('../internals/export');\nvar global = require('../internals/global');\nvar getBuiltIn = require('../internals/get-built-in');\nvar IS_PURE = require('../internals/is-pure');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar NATIVE_SYMBOL = require('../internals/native-symbol');\nvar USE_SYMBOL_AS_UID = require('../internals/use-symbol-as-uid');\nvar fails = require('../internals/fails');\nvar has = require('../internals/has');\nvar isArray = require('../internals/is-array');\nvar isObject = require('../internals/is-object');\nvar anObject = require('../internals/an-object');\nvar toObject = require('../internals/to-object');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar toPrimitive = require('../internals/to-primitive');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\nvar nativeObjectCreate = require('../internals/object-create');\nvar objectKeys = require('../internals/object-keys');\nvar getOwnPropertyNamesModule = require('../internals/object-get-own-property-names');\nvar getOwnPropertyNamesExternal = require('../internals/object-get-own-property-names-external');\nvar getOwnPropertySymbolsModule = require('../internals/object-get-own-property-symbols');\nvar getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');\nvar definePropertyModule = require('../internals/object-define-property');\nvar propertyIsEnumerableModule = require('../internals/object-property-is-enumerable');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar redefine = require('../internals/redefine');\nvar shared = require('../internals/shared');\nvar sharedKey = require('../internals/shared-key');\nvar hiddenKeys = require('../internals/hidden-keys');\nvar uid = require('../internals/uid');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar wrappedWellKnownSymbolModule = require('../internals/well-known-symbol-wrapped');\nvar defineWellKnownSymbol = require('../internals/define-well-known-symbol');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar InternalStateModule = require('../internals/internal-state');\nvar $forEach = require('../internals/array-iteration').forEach;\n\nvar HIDDEN = sharedKey('hidden');\nvar SYMBOL = 'Symbol';\nvar PROTOTYPE = 'prototype';\nvar TO_PRIMITIVE = wellKnownSymbol('toPrimitive');\nvar setInternalState = InternalStateModule.set;\nvar getInternalState = InternalStateModule.getterFor(SYMBOL);\nvar ObjectPrototype = Object[PROTOTYPE];\nvar $Symbol = global.Symbol;\nvar $stringify = getBuiltIn('JSON', 'stringify');\nvar nativeGetOwnPropertyDescriptor = getOwnPropertyDescriptorModule.f;\nvar nativeDefineProperty = definePropertyModule.f;\nvar nativeGetOwnPropertyNames = getOwnPropertyNamesExternal.f;\nvar nativePropertyIsEnumerable = propertyIsEnumerableModule.f;\nvar AllSymbols = shared('symbols');\nvar ObjectPrototypeSymbols = shared('op-symbols');\nvar StringToSymbolRegistry = shared('string-to-symbol-registry');\nvar SymbolToStringRegistry = shared('symbol-to-string-registry');\nvar WellKnownSymbolsStore = shared('wks');\nvar QObject = global.QObject;\n// Don't use setters in Qt Script, https://github.com/zloirock/core-js/issues/173\nvar USE_SETTER = !QObject || !QObject[PROTOTYPE] || !QObject[PROTOTYPE].findChild;\n\n// fallback for old Android, https://code.google.com/p/v8/issues/detail?id=687\nvar setSymbolDescriptor = DESCRIPTORS && fails(function () {\n  return nativeObjectCreate(nativeDefineProperty({}, 'a', {\n    get: function () { return nativeDefineProperty(this, 'a', { value: 7 }).a; }\n  })).a != 7;\n}) ? function (O, P, Attributes) {\n  var ObjectPrototypeDescriptor = nativeGetOwnPropertyDescriptor(ObjectPrototype, P);\n  if (ObjectPrototypeDescriptor) delete ObjectPrototype[P];\n  nativeDefineProperty(O, P, Attributes);\n  if (ObjectPrototypeDescriptor && O !== ObjectPrototype) {\n    nativeDefineProperty(ObjectPrototype, P, ObjectPrototypeDescriptor);\n  }\n} : nativeDefineProperty;\n\nvar wrap = function (tag, description) {\n  var symbol = AllSymbols[tag] = nativeObjectCreate($Symbol[PROTOTYPE]);\n  setInternalState(symbol, {\n    type: SYMBOL,\n    tag: tag,\n    description: description\n  });\n  if (!DESCRIPTORS) symbol.description = description;\n  return symbol;\n};\n\nvar isSymbol = USE_SYMBOL_AS_UID ? function (it) {\n  return typeof it == 'symbol';\n} : function (it) {\n  return Object(it) instanceof $Symbol;\n};\n\nvar $defineProperty = function defineProperty(O, P, Attributes) {\n  if (O === ObjectPrototype) $defineProperty(ObjectPrototypeSymbols, P, Attributes);\n  anObject(O);\n  var key = toPrimitive(P, true);\n  anObject(Attributes);\n  if (has(AllSymbols, key)) {\n    if (!Attributes.enumerable) {\n      if (!has(O, HIDDEN)) nativeDefineProperty(O, HIDDEN, createPropertyDescriptor(1, {}));\n      O[HIDDEN][key] = true;\n    } else {\n      if (has(O, HIDDEN) && O[HIDDEN][key]) O[HIDDEN][key] = false;\n      Attributes = nativeObjectCreate(Attributes, { enumerable: createPropertyDescriptor(0, false) });\n    } return setSymbolDescriptor(O, key, Attributes);\n  } return nativeDefineProperty(O, key, Attributes);\n};\n\nvar $defineProperties = function defineProperties(O, Properties) {\n  anObject(O);\n  var properties = toIndexedObject(Properties);\n  var keys = objectKeys(properties).concat($getOwnPropertySymbols(properties));\n  $forEach(keys, function (key) {\n    if (!DESCRIPTORS || $propertyIsEnumerable.call(properties, key)) $defineProperty(O, key, properties[key]);\n  });\n  return O;\n};\n\nvar $create = function create(O, Properties) {\n  return Properties === undefined ? nativeObjectCreate(O) : $defineProperties(nativeObjectCreate(O), Properties);\n};\n\nvar $propertyIsEnumerable = function propertyIsEnumerable(V) {\n  var P = toPrimitive(V, true);\n  var enumerable = nativePropertyIsEnumerable.call(this, P);\n  if (this === ObjectPrototype && has(AllSymbols, P) && !has(ObjectPrototypeSymbols, P)) return false;\n  return enumerable || !has(this, P) || !has(AllSymbols, P) || has(this, HIDDEN) && this[HIDDEN][P] ? enumerable : true;\n};\n\nvar $getOwnPropertyDescriptor = function getOwnPropertyDescriptor(O, P) {\n  var it = toIndexedObject(O);\n  var key = toPrimitive(P, true);\n  if (it === ObjectPrototype && has(AllSymbols, key) && !has(ObjectPrototypeSymbols, key)) return;\n  var descriptor = nativeGetOwnPropertyDescriptor(it, key);\n  if (descriptor && has(AllSymbols, key) && !(has(it, HIDDEN) && it[HIDDEN][key])) {\n    descriptor.enumerable = true;\n  }\n  return descriptor;\n};\n\nvar $getOwnPropertyNames = function getOwnPropertyNames(O) {\n  var names = nativeGetOwnPropertyNames(toIndexedObject(O));\n  var result = [];\n  $forEach(names, function (key) {\n    if (!has(AllSymbols, key) && !has(hiddenKeys, key)) result.push(key);\n  });\n  return result;\n};\n\nvar $getOwnPropertySymbols = function getOwnPropertySymbols(O) {\n  var IS_OBJECT_PROTOTYPE = O === ObjectPrototype;\n  var names = nativeGetOwnPropertyNames(IS_OBJECT_PROTOTYPE ? ObjectPrototypeSymbols : toIndexedObject(O));\n  var result = [];\n  $forEach(names, function (key) {\n    if (has(AllSymbols, key) && (!IS_OBJECT_PROTOTYPE || has(ObjectPrototype, key))) {\n      result.push(AllSymbols[key]);\n    }\n  });\n  return result;\n};\n\n// `Symbol` constructor\n// https://tc39.github.io/ecma262/#sec-symbol-constructor\nif (!NATIVE_SYMBOL) {\n  $Symbol = function Symbol() {\n    if (this instanceof $Symbol) throw TypeError('Symbol is not a constructor');\n    var description = !arguments.length || arguments[0] === undefined ? undefined : String(arguments[0]);\n    var tag = uid(description);\n    var setter = function (value) {\n      if (this === ObjectPrototype) setter.call(ObjectPrototypeSymbols, value);\n      if (has(this, HIDDEN) && has(this[HIDDEN], tag)) this[HIDDEN][tag] = false;\n      setSymbolDescriptor(this, tag, createPropertyDescriptor(1, value));\n    };\n    if (DESCRIPTORS && USE_SETTER) setSymbolDescriptor(ObjectPrototype, tag, { configurable: true, set: setter });\n    return wrap(tag, description);\n  };\n\n  redefine($Symbol[PROTOTYPE], 'toString', function toString() {\n    return getInternalState(this).tag;\n  });\n\n  redefine($Symbol, 'withoutSetter', function (description) {\n    return wrap(uid(description), description);\n  });\n\n  propertyIsEnumerableModule.f = $propertyIsEnumerable;\n  definePropertyModule.f = $defineProperty;\n  getOwnPropertyDescriptorModule.f = $getOwnPropertyDescriptor;\n  getOwnPropertyNamesModule.f = getOwnPropertyNamesExternal.f = $getOwnPropertyNames;\n  getOwnPropertySymbolsModule.f = $getOwnPropertySymbols;\n\n  wrappedWellKnownSymbolModule.f = function (name) {\n    return wrap(wellKnownSymbol(name), name);\n  };\n\n  if (DESCRIPTORS) {\n    // https://github.com/tc39/proposal-Symbol-description\n    nativeDefineProperty($Symbol[PROTOTYPE], 'description', {\n      configurable: true,\n      get: function description() {\n        return getInternalState(this).description;\n      }\n    });\n    if (!IS_PURE) {\n      redefine(ObjectPrototype, 'propertyIsEnumerable', $propertyIsEnumerable, { unsafe: true });\n    }\n  }\n}\n\n$({ global: true, wrap: true, forced: !NATIVE_SYMBOL, sham: !NATIVE_SYMBOL }, {\n  Symbol: $Symbol\n});\n\n$forEach(objectKeys(WellKnownSymbolsStore), function (name) {\n  defineWellKnownSymbol(name);\n});\n\n$({ target: SYMBOL, stat: true, forced: !NATIVE_SYMBOL }, {\n  // `Symbol.for` method\n  // https://tc39.github.io/ecma262/#sec-symbol.for\n  'for': function (key) {\n    var string = String(key);\n    if (has(StringToSymbolRegistry, string)) return StringToSymbolRegistry[string];\n    var symbol = $Symbol(string);\n    StringToSymbolRegistry[string] = symbol;\n    SymbolToStringRegistry[symbol] = string;\n    return symbol;\n  },\n  // `Symbol.keyFor` method\n  // https://tc39.github.io/ecma262/#sec-symbol.keyfor\n  keyFor: function keyFor(sym) {\n    if (!isSymbol(sym)) throw TypeError(sym + ' is not a symbol');\n    if (has(SymbolToStringRegistry, sym)) return SymbolToStringRegistry[sym];\n  },\n  useSetter: function () { USE_SETTER = true; },\n  useSimple: function () { USE_SETTER = false; }\n});\n\n$({ target: 'Object', stat: true, forced: !NATIVE_SYMBOL, sham: !DESCRIPTORS }, {\n  // `Object.create` method\n  // https://tc39.github.io/ecma262/#sec-object.create\n  create: $create,\n  // `Object.defineProperty` method\n  // https://tc39.github.io/ecma262/#sec-object.defineproperty\n  defineProperty: $defineProperty,\n  // `Object.defineProperties` method\n  // https://tc39.github.io/ecma262/#sec-object.defineproperties\n  defineProperties: $defineProperties,\n  // `Object.getOwnPropertyDescriptor` method\n  // https://tc39.github.io/ecma262/#sec-object.getownpropertydescriptors\n  getOwnPropertyDescriptor: $getOwnPropertyDescriptor\n});\n\n$({ target: 'Object', stat: true, forced: !NATIVE_SYMBOL }, {\n  // `Object.getOwnPropertyNames` method\n  // https://tc39.github.io/ecma262/#sec-object.getownpropertynames\n  getOwnPropertyNames: $getOwnPropertyNames,\n  // `Object.getOwnPropertySymbols` method\n  // https://tc39.github.io/ecma262/#sec-object.getownpropertysymbols\n  getOwnPropertySymbols: $getOwnPropertySymbols\n});\n\n// Chrome 38 and 39 `Object.getOwnPropertySymbols` fails on primitives\n// https://bugs.chromium.org/p/v8/issues/detail?id=3443\n$({ target: 'Object', stat: true, forced: fails(function () { getOwnPropertySymbolsModule.f(1); }) }, {\n  getOwnPropertySymbols: function getOwnPropertySymbols(it) {\n    return getOwnPropertySymbolsModule.f(toObject(it));\n  }\n});\n\n// `JSON.stringify` method behavior with symbols\n// https://tc39.github.io/ecma262/#sec-json.stringify\nif ($stringify) {\n  var FORCED_JSON_STRINGIFY = !NATIVE_SYMBOL || fails(function () {\n    var symbol = $Symbol();\n    // MS Edge converts symbol values to JSON as {}\n    return $stringify([symbol]) != '[null]'\n      // WebKit converts symbol values to JSON as null\n      || $stringify({ a: symbol }) != '{}'\n      // V8 throws on boxed symbols\n      || $stringify(Object(symbol)) != '{}';\n  });\n\n  $({ target: 'JSON', stat: true, forced: FORCED_JSON_STRINGIFY }, {\n    // eslint-disable-next-line no-unused-vars\n    stringify: function stringify(it, replacer, space) {\n      var args = [it];\n      var index = 1;\n      var $replacer;\n      while (arguments.length > index) args.push(arguments[index++]);\n      $replacer = replacer;\n      if (!isObject(replacer) && it === undefined || isSymbol(it)) return; // IE8 returns string on undefined\n      if (!isArray(replacer)) replacer = function (key, value) {\n        if (typeof $replacer == 'function') value = $replacer.call(this, key, value);\n        if (!isSymbol(value)) return value;\n      };\n      args[1] = replacer;\n      return $stringify.apply(null, args);\n    }\n  });\n}\n\n// `Symbol.prototype[@@toPrimitive]` method\n// https://tc39.github.io/ecma262/#sec-symbol.prototype-@@toprimitive\nif (!$Symbol[PROTOTYPE][TO_PRIMITIVE]) {\n  createNonEnumerableProperty($Symbol[PROTOTYPE], TO_PRIMITIVE, $Symbol[PROTOTYPE].valueOf);\n}\n// `Symbol.prototype[@@toStringTag]` property\n// https://tc39.github.io/ecma262/#sec-symbol.prototype-@@tostringtag\nsetToStringTag($Symbol, SYMBOL);\n\nhiddenKeys[HIDDEN] = true;\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.match` well-known symbol\n// https://tc39.github.io/ecma262/#sec-symbol.match\ndefineWellKnownSymbol('match');\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.replace` well-known symbol\n// https://tc39.github.io/ecma262/#sec-symbol.replace\ndefineWellKnownSymbol('replace');\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.search` well-known symbol\n// https://tc39.github.io/ecma262/#sec-symbol.search\ndefineWellKnownSymbol('search');\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.species` well-known symbol\n// https://tc39.github.io/ecma262/#sec-symbol.species\ndefineWellKnownSymbol('species');\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.split` well-known symbol\n// https://tc39.github.io/ecma262/#sec-symbol.split\ndefineWellKnownSymbol('split');\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.toPrimitive` well-known symbol\n// https://tc39.github.io/ecma262/#sec-symbol.toprimitive\ndefineWellKnownSymbol('toPrimitive');\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.toStringTag` well-known symbol\n// https://tc39.github.io/ecma262/#sec-symbol.tostringtag\ndefineWellKnownSymbol('toStringTag');\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.unscopables` well-known symbol\n// https://tc39.github.io/ecma262/#sec-symbol.unscopables\ndefineWellKnownSymbol('unscopables');\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $copyWithin = require('../internals/array-copy-within');\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.copyWithin` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.copywithin\nexportTypedArrayMethod('copyWithin', function copyWithin(target, start /* , end */) {\n  return $copyWithin.call(aTypedArray(this), target, start, arguments.length > 2 ? arguments[2] : undefined);\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $every = require('../internals/array-iteration').every;\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.every` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.every\nexportTypedArrayMethod('every', function every(callbackfn /* , thisArg */) {\n  return $every(aTypedArray(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $fill = require('../internals/array-fill');\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.fill` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.fill\n// eslint-disable-next-line no-unused-vars\nexportTypedArrayMethod('fill', function fill(value /* , start, end */) {\n  return $fill.apply(aTypedArray(this), arguments);\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $filter = require('../internals/array-iteration').filter;\nvar speciesConstructor = require('../internals/species-constructor');\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar aTypedArrayConstructor = ArrayBufferViewCore.aTypedArrayConstructor;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.filter` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.filter\nexportTypedArrayMethod('filter', function filter(callbackfn /* , thisArg */) {\n  var list = $filter(aTypedArray(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n  var C = speciesConstructor(this, this.constructor);\n  var index = 0;\n  var length = list.length;\n  var result = new (aTypedArrayConstructor(C))(length);\n  while (length > index) result[index] = list[index++];\n  return result;\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $findIndex = require('../internals/array-iteration').findIndex;\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.findIndex` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.findindex\nexportTypedArrayMethod('findIndex', function findIndex(predicate /* , thisArg */) {\n  return $findIndex(aTypedArray(this), predicate, arguments.length > 1 ? arguments[1] : undefined);\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $find = require('../internals/array-iteration').find;\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.find` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.find\nexportTypedArrayMethod('find', function find(predicate /* , thisArg */) {\n  return $find(aTypedArray(this), predicate, arguments.length > 1 ? arguments[1] : undefined);\n});\n","var createTypedArrayConstructor = require('../internals/typed-array-constructor');\n\n// `Float32Array` constructor\n// https://tc39.github.io/ecma262/#sec-typedarray-objects\ncreateTypedArrayConstructor('Float32', function (init) {\n  return function Float32Array(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n});\n","var createTypedArrayConstructor = require('../internals/typed-array-constructor');\n\n// `Float64Array` constructor\n// https://tc39.github.io/ecma262/#sec-typedarray-objects\ncreateTypedArrayConstructor('Float64', function (init) {\n  return function Float64Array(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $forEach = require('../internals/array-iteration').forEach;\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.forEach` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.foreach\nexportTypedArrayMethod('forEach', function forEach(callbackfn /* , thisArg */) {\n  $forEach(aTypedArray(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n});\n","'use strict';\nvar TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS = require('../internals/typed-array-constructors-require-wrappers');\nvar exportTypedArrayStaticMethod = require('../internals/array-buffer-view-core').exportTypedArrayStaticMethod;\nvar typedArrayFrom = require('../internals/typed-array-from');\n\n// `%TypedArray%.from` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.from\nexportTypedArrayStaticMethod('from', typedArrayFrom, TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS);\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $includes = require('../internals/array-includes').includes;\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.includes` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.includes\nexportTypedArrayMethod('includes', function includes(searchElement /* , fromIndex */) {\n  return $includes(aTypedArray(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $indexOf = require('../internals/array-includes').indexOf;\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.indexOf` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.indexof\nexportTypedArrayMethod('indexOf', function indexOf(searchElement /* , fromIndex */) {\n  return $indexOf(aTypedArray(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);\n});\n","var createTypedArrayConstructor = require('../internals/typed-array-constructor');\n\n// `Int16Array` constructor\n// https://tc39.github.io/ecma262/#sec-typedarray-objects\ncreateTypedArrayConstructor('Int16', function (init) {\n  return function Int16Array(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n});\n","var createTypedArrayConstructor = require('../internals/typed-array-constructor');\n\n// `Int32Array` constructor\n// https://tc39.github.io/ecma262/#sec-typedarray-objects\ncreateTypedArrayConstructor('Int32', function (init) {\n  return function Int32Array(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n});\n","var createTypedArrayConstructor = require('../internals/typed-array-constructor');\n\n// `Int8Array` constructor\n// https://tc39.github.io/ecma262/#sec-typedarray-objects\ncreateTypedArrayConstructor('Int8', function (init) {\n  return function Int8Array(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n});\n","'use strict';\nvar global = require('../internals/global');\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar ArrayIterators = require('../modules/es.array.iterator');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar ITERATOR = wellKnownSymbol('iterator');\nvar Uint8Array = global.Uint8Array;\nvar arrayValues = ArrayIterators.values;\nvar arrayKeys = ArrayIterators.keys;\nvar arrayEntries = ArrayIterators.entries;\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\nvar nativeTypedArrayIterator = Uint8Array && Uint8Array.prototype[ITERATOR];\n\nvar CORRECT_ITER_NAME = !!nativeTypedArrayIterator\n  && (nativeTypedArrayIterator.name == 'values' || nativeTypedArrayIterator.name == undefined);\n\nvar typedArrayValues = function values() {\n  return arrayValues.call(aTypedArray(this));\n};\n\n// `%TypedArray%.prototype.entries` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.entries\nexportTypedArrayMethod('entries', function entries() {\n  return arrayEntries.call(aTypedArray(this));\n});\n// `%TypedArray%.prototype.keys` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.keys\nexportTypedArrayMethod('keys', function keys() {\n  return arrayKeys.call(aTypedArray(this));\n});\n// `%TypedArray%.prototype.values` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.values\nexportTypedArrayMethod('values', typedArrayValues, !CORRECT_ITER_NAME);\n// `%TypedArray%.prototype[@@iterator]` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype-@@iterator\nexportTypedArrayMethod(ITERATOR, typedArrayValues, !CORRECT_ITER_NAME);\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\nvar $join = [].join;\n\n// `%TypedArray%.prototype.join` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.join\n// eslint-disable-next-line no-unused-vars\nexportTypedArrayMethod('join', function join(separator) {\n  return $join.apply(aTypedArray(this), arguments);\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $lastIndexOf = require('../internals/array-last-index-of');\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.lastIndexOf` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.lastindexof\n// eslint-disable-next-line no-unused-vars\nexportTypedArrayMethod('lastIndexOf', function lastIndexOf(searchElement /* , fromIndex */) {\n  return $lastIndexOf.apply(aTypedArray(this), arguments);\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $map = require('../internals/array-iteration').map;\nvar speciesConstructor = require('../internals/species-constructor');\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar aTypedArrayConstructor = ArrayBufferViewCore.aTypedArrayConstructor;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.map` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.map\nexportTypedArrayMethod('map', function map(mapfn /* , thisArg */) {\n  return $map(aTypedArray(this), mapfn, arguments.length > 1 ? arguments[1] : undefined, function (O, length) {\n    return new (aTypedArrayConstructor(speciesConstructor(O, O.constructor)))(length);\n  });\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS = require('../internals/typed-array-constructors-require-wrappers');\n\nvar aTypedArrayConstructor = ArrayBufferViewCore.aTypedArrayConstructor;\nvar exportTypedArrayStaticMethod = ArrayBufferViewCore.exportTypedArrayStaticMethod;\n\n// `%TypedArray%.of` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.of\nexportTypedArrayStaticMethod('of', function of(/* ...items */) {\n  var index = 0;\n  var length = arguments.length;\n  var result = new (aTypedArrayConstructor(this))(length);\n  while (length > index) result[index] = arguments[index++];\n  return result;\n}, TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS);\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $reduceRight = require('../internals/array-reduce').right;\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.reduceRicht` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.reduceright\nexportTypedArrayMethod('reduceRight', function reduceRight(callbackfn /* , initialValue */) {\n  return $reduceRight(aTypedArray(this), callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $reduce = require('../internals/array-reduce').left;\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.reduce` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.reduce\nexportTypedArrayMethod('reduce', function reduce(callbackfn /* , initialValue */) {\n  return $reduce(aTypedArray(this), callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\nvar floor = Math.floor;\n\n// `%TypedArray%.prototype.reverse` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.reverse\nexportTypedArrayMethod('reverse', function reverse() {\n  var that = this;\n  var length = aTypedArray(that).length;\n  var middle = floor(length / 2);\n  var index = 0;\n  var value;\n  while (index < middle) {\n    value = that[index];\n    that[index++] = that[--length];\n    that[length] = value;\n  } return that;\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar toLength = require('../internals/to-length');\nvar toOffset = require('../internals/to-offset');\nvar toObject = require('../internals/to-object');\nvar fails = require('../internals/fails');\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\nvar FORCED = fails(function () {\n  // eslint-disable-next-line no-undef\n  new Int8Array(1).set({});\n});\n\n// `%TypedArray%.prototype.set` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.set\nexportTypedArrayMethod('set', function set(arrayLike /* , offset */) {\n  aTypedArray(this);\n  var offset = toOffset(arguments.length > 1 ? arguments[1] : undefined, 1);\n  var length = this.length;\n  var src = toObject(arrayLike);\n  var len = toLength(src.length);\n  var index = 0;\n  if (len + offset > length) throw RangeError('Wrong length');\n  while (index < len) this[offset + index] = src[index++];\n}, FORCED);\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar speciesConstructor = require('../internals/species-constructor');\nvar fails = require('../internals/fails');\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar aTypedArrayConstructor = ArrayBufferViewCore.aTypedArrayConstructor;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\nvar $slice = [].slice;\n\nvar FORCED = fails(function () {\n  // eslint-disable-next-line no-undef\n  new Int8Array(1).slice();\n});\n\n// `%TypedArray%.prototype.slice` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.slice\nexportTypedArrayMethod('slice', function slice(start, end) {\n  var list = $slice.call(aTypedArray(this), start, end);\n  var C = speciesConstructor(this, this.constructor);\n  var index = 0;\n  var length = list.length;\n  var result = new (aTypedArrayConstructor(C))(length);\n  while (length > index) result[index] = list[index++];\n  return result;\n}, FORCED);\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar $some = require('../internals/array-iteration').some;\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.some` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.some\nexportTypedArrayMethod('some', function some(callbackfn /* , thisArg */) {\n  return $some(aTypedArray(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\nvar $sort = [].sort;\n\n// `%TypedArray%.prototype.sort` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.sort\nexportTypedArrayMethod('sort', function sort(comparefn) {\n  return $sort.call(aTypedArray(this), comparefn);\n});\n","'use strict';\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar toLength = require('../internals/to-length');\nvar toAbsoluteIndex = require('../internals/to-absolute-index');\nvar speciesConstructor = require('../internals/species-constructor');\n\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\n\n// `%TypedArray%.prototype.subarray` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.subarray\nexportTypedArrayMethod('subarray', function subarray(begin, end) {\n  var O = aTypedArray(this);\n  var length = O.length;\n  var beginIndex = toAbsoluteIndex(begin, length);\n  return new (speciesConstructor(O, O.constructor))(\n    O.buffer,\n    O.byteOffset + beginIndex * O.BYTES_PER_ELEMENT,\n    toLength((end === undefined ? length : toAbsoluteIndex(end, length)) - beginIndex)\n  );\n});\n","'use strict';\nvar global = require('../internals/global');\nvar ArrayBufferViewCore = require('../internals/array-buffer-view-core');\nvar fails = require('../internals/fails');\n\nvar Int8Array = global.Int8Array;\nvar aTypedArray = ArrayBufferViewCore.aTypedArray;\nvar exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;\nvar $toLocaleString = [].toLocaleString;\nvar $slice = [].slice;\n\n// iOS Safari 6.x fails here\nvar TO_LOCALE_STRING_BUG = !!Int8Array && fails(function () {\n  $toLocaleString.call(new Int8Array(1));\n});\n\nvar FORCED = fails(function () {\n  return [1, 2].toLocaleString() != new Int8Array([1, 2]).toLocaleString();\n}) || !fails(function () {\n  Int8Array.prototype.toLocaleString.call([1, 2]);\n});\n\n// `%TypedArray%.prototype.toLocaleString` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.tolocalestring\nexportTypedArrayMethod('toLocaleString', function toLocaleString() {\n  return $toLocaleString.apply(TO_LOCALE_STRING_BUG ? $slice.call(aTypedArray(this)) : aTypedArray(this), arguments);\n}, FORCED);\n","'use strict';\nvar exportTypedArrayMethod = require('../internals/array-buffer-view-core').exportTypedArrayMethod;\nvar fails = require('../internals/fails');\nvar global = require('../internals/global');\n\nvar Uint8Array = global.Uint8Array;\nvar Uint8ArrayPrototype = Uint8Array && Uint8Array.prototype || {};\nvar arrayToString = [].toString;\nvar arrayJoin = [].join;\n\nif (fails(function () { arrayToString.call({}); })) {\n  arrayToString = function toString() {\n    return arrayJoin.call(this);\n  };\n}\n\nvar IS_NOT_ARRAY_METHOD = Uint8ArrayPrototype.toString != arrayToString;\n\n// `%TypedArray%.prototype.toString` method\n// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.tostring\nexportTypedArrayMethod('toString', arrayToString, IS_NOT_ARRAY_METHOD);\n","var createTypedArrayConstructor = require('../internals/typed-array-constructor');\n\n// `Uint16Array` constructor\n// https://tc39.github.io/ecma262/#sec-typedarray-objects\ncreateTypedArrayConstructor('Uint16', function (init) {\n  return function Uint16Array(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n});\n","var createTypedArrayConstructor = require('../internals/typed-array-constructor');\n\n// `Uint32Array` constructor\n// https://tc39.github.io/ecma262/#sec-typedarray-objects\ncreateTypedArrayConstructor('Uint32', function (init) {\n  return function Uint32Array(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n});\n","var createTypedArrayConstructor = require('../internals/typed-array-constructor');\n\n// `Uint8Array` constructor\n// https://tc39.github.io/ecma262/#sec-typedarray-objects\ncreateTypedArrayConstructor('Uint8', function (init) {\n  return function Uint8Array(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n});\n","var createTypedArrayConstructor = require('../internals/typed-array-constructor');\n\n// `Uint8ClampedArray` constructor\n// https://tc39.github.io/ecma262/#sec-typedarray-objects\ncreateTypedArrayConstructor('Uint8', function (init) {\n  return function Uint8ClampedArray(data, byteOffset, length) {\n    return init(this, data, byteOffset, length);\n  };\n}, true);\n","'use strict';\nvar global = require('../internals/global');\nvar redefineAll = require('../internals/redefine-all');\nvar InternalMetadataModule = require('../internals/internal-metadata');\nvar collection = require('../internals/collection');\nvar collectionWeak = require('../internals/collection-weak');\nvar isObject = require('../internals/is-object');\nvar enforceIternalState = require('../internals/internal-state').enforce;\nvar NATIVE_WEAK_MAP = require('../internals/native-weak-map');\n\nvar IS_IE11 = !global.ActiveXObject && 'ActiveXObject' in global;\nvar isExtensible = Object.isExtensible;\nvar InternalWeakMap;\n\nvar wrapper = function (init) {\n  return function WeakMap() {\n    return init(this, arguments.length ? arguments[0] : undefined);\n  };\n};\n\n// `WeakMap` constructor\n// https://tc39.github.io/ecma262/#sec-weakmap-constructor\nvar $WeakMap = module.exports = collection('WeakMap', wrapper, collectionWeak);\n\n// IE11 WeakMap frozen keys fix\n// We can't use feature detection because it crash some old IE builds\n// https://github.com/zloirock/core-js/issues/485\nif (NATIVE_WEAK_MAP && IS_IE11) {\n  InternalWeakMap = collectionWeak.getConstructor(wrapper, 'WeakMap', true);\n  InternalMetadataModule.REQUIRED = true;\n  var WeakMapPrototype = $WeakMap.prototype;\n  var nativeDelete = WeakMapPrototype['delete'];\n  var nativeHas = WeakMapPrototype.has;\n  var nativeGet = WeakMapPrototype.get;\n  var nativeSet = WeakMapPrototype.set;\n  redefineAll(WeakMapPrototype, {\n    'delete': function (key) {\n      if (isObject(key) && !isExtensible(key)) {\n        var state = enforceIternalState(this);\n        if (!state.frozen) state.frozen = new InternalWeakMap();\n        return nativeDelete.call(this, key) || state.frozen['delete'](key);\n      } return nativeDelete.call(this, key);\n    },\n    has: function has(key) {\n      if (isObject(key) && !isExtensible(key)) {\n        var state = enforceIternalState(this);\n        if (!state.frozen) state.frozen = new InternalWeakMap();\n        return nativeHas.call(this, key) || state.frozen.has(key);\n      } return nativeHas.call(this, key);\n    },\n    get: function get(key) {\n      if (isObject(key) && !isExtensible(key)) {\n        var state = enforceIternalState(this);\n        if (!state.frozen) state.frozen = new InternalWeakMap();\n        return nativeHas.call(this, key) ? nativeGet.call(this, key) : state.frozen.get(key);\n      } return nativeGet.call(this, key);\n    },\n    set: function set(key, value) {\n      if (isObject(key) && !isExtensible(key)) {\n        var state = enforceIternalState(this);\n        if (!state.frozen) state.frozen = new InternalWeakMap();\n        nativeHas.call(this, key) ? nativeSet.call(this, key, value) : state.frozen.set(key, value);\n      } else nativeSet.call(this, key, value);\n      return this;\n    }\n  });\n}\n","'use strict';\nvar collection = require('../internals/collection');\nvar collectionWeak = require('../internals/collection-weak');\n\n// `WeakSet` constructor\n// https://tc39.github.io/ecma262/#sec-weakset-constructor\ncollection('WeakSet', function (init) {\n  return function WeakSet() { return init(this, arguments.length ? arguments[0] : undefined); };\n}, collectionWeak);\n","'use strict';\nvar $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\nvar setPrototypeOf = require('../internals/object-set-prototype-of');\nvar create = require('../internals/object-create');\nvar defineProperty = require('../internals/object-define-property');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\nvar iterate = require('../internals/iterate');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar InternalStateModule = require('../internals/internal-state');\n\nvar setInternalState = InternalStateModule.set;\nvar getInternalAggregateErrorState = InternalStateModule.getterFor('AggregateError');\n\nvar $AggregateError = function AggregateError(errors, message) {\n  var that = this;\n  if (!(that instanceof $AggregateError)) return new $AggregateError(errors, message);\n  if (setPrototypeOf) {\n    that = setPrototypeOf(new Error(message), getPrototypeOf(that));\n  }\n  var errorsArray = [];\n  iterate(errors, errorsArray.push, errorsArray);\n  if (DESCRIPTORS) setInternalState(that, { errors: errorsArray, type: 'AggregateError' });\n  else that.errors = errorsArray;\n  if (message !== undefined) createNonEnumerableProperty(that, 'message', String(message));\n  return that;\n};\n\n$AggregateError.prototype = create(Error.prototype, {\n  constructor: createPropertyDescriptor(5, $AggregateError),\n  message: createPropertyDescriptor(5, ''),\n  name: createPropertyDescriptor(5, 'AggregateError')\n});\n\nif (DESCRIPTORS) defineProperty.f($AggregateError.prototype, 'errors', {\n  get: function () {\n    return getInternalAggregateErrorState(this).errors;\n  },\n  configurable: true\n});\n\n$({ global: true }, {\n  AggregateError: $AggregateError\n});\n","'use strict';\nvar DESCRIPTORS = require('../internals/descriptors');\nvar addToUnscopables = require('../internals/add-to-unscopables');\nvar toObject = require('../internals/to-object');\nvar toLength = require('../internals/to-length');\nvar defineProperty = require('../internals/object-define-property').f;\n\n// `Array.prototype.lastIndex` getter\n// https://github.com/keithamus/proposal-array-last\nif (DESCRIPTORS && !('lastIndex' in [])) {\n  defineProperty(Array.prototype, 'lastIndex', {\n    configurable: true,\n    get: function lastIndex() {\n      var O = toObject(this);\n      var len = toLength(O.length);\n      return len == 0 ? 0 : len - 1;\n    }\n  });\n\n  addToUnscopables('lastIndex');\n}\n","'use strict';\nvar DESCRIPTORS = require('../internals/descriptors');\nvar addToUnscopables = require('../internals/add-to-unscopables');\nvar toObject = require('../internals/to-object');\nvar toLength = require('../internals/to-length');\nvar defineProperty = require('../internals/object-define-property').f;\n\n// `Array.prototype.lastIndex` accessor\n// https://github.com/keithamus/proposal-array-last\nif (DESCRIPTORS && !('lastItem' in [])) {\n  defineProperty(Array.prototype, 'lastItem', {\n    configurable: true,\n    get: function lastItem() {\n      var O = toObject(this);\n      var len = toLength(O.length);\n      return len == 0 ? undefined : O[len - 1];\n    },\n    set: function lastItem(value) {\n      var O = toObject(this);\n      var len = toLength(O.length);\n      return O[len == 0 ? 0 : len - 1] = value;\n    }\n  });\n\n  addToUnscopables('lastItem');\n}\n","var $ = require('../internals/export');\nvar getCompositeKeyNode = require('../internals/composite-key');\nvar getBuiltIn = require('../internals/get-built-in');\nvar create = require('../internals/object-create');\n\nvar initializer = function () {\n  var freeze = getBuiltIn('Object', 'freeze');\n  return freeze ? freeze(create(null)) : create(null);\n};\n\n// https://github.com/tc39/proposal-richer-keys/tree/master/compositeKey\n$({ global: true }, {\n  compositeKey: function compositeKey() {\n    return getCompositeKeyNode.apply(Object, arguments).get('object', initializer);\n  }\n});\n","var $ = require('../internals/export');\nvar getCompositeKeyNode = require('../internals/composite-key');\nvar getBuiltIn = require('../internals/get-built-in');\n\n// https://github.com/tc39/proposal-richer-keys/tree/master/compositeKey\n$({ global: true }, {\n  compositeSymbol: function compositeSymbol() {\n    if (arguments.length === 1 && typeof arguments[0] === 'string') return getBuiltIn('Symbol')['for'](arguments[0]);\n    return getCompositeKeyNode.apply(null, arguments).get('symbol', getBuiltIn('Symbol'));\n  }\n});\n","// TODO: Remove from `core-js@4`\nrequire('./es.global-this');\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar collectionDeleteAll = require('../internals/collection-delete-all');\n\n// `Map.prototype.deleteAll` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'Map', proto: true, real: true, forced: IS_PURE }, {\n  deleteAll: function deleteAll(/* ...elements */) {\n    return collectionDeleteAll.apply(this, arguments);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar anObject = require('../internals/an-object');\nvar bind = require('../internals/function-bind-context');\nvar getMapIterator = require('../internals/get-map-iterator');\nvar iterate = require('../internals/iterate');\n\n// `Map.prototype.every` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'Map', proto: true, real: true, forced: IS_PURE }, {\n  every: function every(callbackfn /* , thisArg */) {\n    var map = anObject(this);\n    var iterator = getMapIterator(map);\n    var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);\n    return !iterate(iterator, function (key, value) {\n      if (!boundFunction(value, key, map)) return iterate.stop();\n    }, undefined, true, true).stopped;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar getBuiltIn = require('../internals/get-built-in');\nvar anObject = require('../internals/an-object');\nvar aFunction = require('../internals/a-function');\nvar bind = require('../internals/function-bind-context');\nvar speciesConstructor = require('../internals/species-constructor');\nvar getMapIterator = require('../internals/get-map-iterator');\nvar iterate = require('../internals/iterate');\n\n// `Map.prototype.filter` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'Map', proto: true, real: true, forced: IS_PURE }, {\n  filter: function filter(callbackfn /* , thisArg */) {\n    var map = anObject(this);\n    var iterator = getMapIterator(map);\n    var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);\n    var newMap = new (speciesConstructor(map, getBuiltIn('Map')))();\n    var setter = aFunction(newMap.set);\n    iterate(iterator, function (key, value) {\n      if (boundFunction(value, key, map)) setter.call(newMap, key, value);\n    }, undefined, true, true);\n    return newMap;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar anObject = require('../internals/an-object');\nvar bind = require('../internals/function-bind-context');\nvar getMapIterator = require('../internals/get-map-iterator');\nvar iterate = require('../internals/iterate');\n\n// `Map.prototype.findKey` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'Map', proto: true, real: true, forced: IS_PURE }, {\n  findKey: function findKey(callbackfn /* , thisArg */) {\n    var map = anObject(this);\n    var iterator = getMapIterator(map);\n    var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);\n    return iterate(iterator, function (key, value) {\n      if (boundFunction(value, key, map)) return iterate.stop(key);\n    }, undefined, true, true).result;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar anObject = require('../internals/an-object');\nvar bind = require('../internals/function-bind-context');\nvar getMapIterator = require('../internals/get-map-iterator');\nvar iterate = require('../internals/iterate');\n\n// `Map.prototype.find` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'Map', proto: true, real: true, forced: IS_PURE }, {\n  find: function find(callbackfn /* , thisArg */) {\n    var map = anObject(this);\n    var iterator = getMapIterator(map);\n    var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);\n    return iterate(iterator, function (key, value) {\n      if (boundFunction(value, key, map)) return iterate.stop(value);\n    }, undefined, true, true).result;\n  }\n});\n","var $ = require('../internals/export');\nvar from = require('../internals/collection-from');\n\n// `Map.from` method\n// https://tc39.github.io/proposal-setmap-offrom/#sec-map.from\n$({ target: 'Map', stat: true }, {\n  from: from\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar iterate = require('../internals/iterate');\nvar aFunction = require('../internals/a-function');\n\n// `Map.groupBy` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'Map', stat: true }, {\n  groupBy: function groupBy(iterable, keyDerivative) {\n    var newMap = new this();\n    aFunction(keyDerivative);\n    var has = aFunction(newMap.has);\n    var get = aFunction(newMap.get);\n    var set = aFunction(newMap.set);\n    iterate(iterable, function (element) {\n      var derivedKey = keyDerivative(element);\n      if (!has.call(newMap, derivedKey)) set.call(newMap, derivedKey, [element]);\n      else get.call(newMap, derivedKey).push(element);\n    });\n    return newMap;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar anObject = require('../internals/an-object');\nvar getMapIterator = require('../internals/get-map-iterator');\nvar sameValueZero = require('../internals/same-value-zero');\nvar iterate = require('../internals/iterate');\n\n// `Map.prototype.includes` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'Map', proto: true, real: true, forced: IS_PURE }, {\n  includes: function includes(searchElement) {\n    return iterate(getMapIterator(anObject(this)), function (key, value) {\n      if (sameValueZero(value, searchElement)) return iterate.stop();\n    }, undefined, true, true).stopped;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar iterate = require('../internals/iterate');\nvar aFunction = require('../internals/a-function');\n\n// `Map.keyBy` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'Map', stat: true }, {\n  keyBy: function keyBy(iterable, keyDerivative) {\n    var newMap = new this();\n    aFunction(keyDerivative);\n    var setter = aFunction(newMap.set);\n    iterate(iterable, function (element) {\n      setter.call(newMap, keyDerivative(element), element);\n    });\n    return newMap;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar anObject = require('../internals/an-object');\nvar getMapIterator = require('../internals/get-map-iterator');\nvar iterate = require('../internals/iterate');\n\n// `Map.prototype.includes` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'Map', proto: true, real: true, forced: IS_PURE }, {\n  keyOf: function keyOf(searchElement) {\n    return iterate(getMapIterator(anObject(this)), function (key, value) {\n      if (value === searchElement) return iterate.stop(key);\n    }, undefined, true, true).result;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar getBuiltIn = require('../internals/get-built-in');\nvar anObject = require('../internals/an-object');\nvar aFunction = require('../internals/a-function');\nvar bind = require('../internals/function-bind-context');\nvar speciesConstructor = require('../internals/species-constructor');\nvar getMapIterator = require('../internals/get-map-iterator');\nvar iterate = require('../internals/iterate');\n\n// `Map.prototype.mapKeys` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'Map', proto: true, real: true, forced: IS_PURE }, {\n  mapKeys: function mapKeys(callbackfn /* , thisArg */) {\n    var map = anObject(this);\n    var iterator = getMapIterator(map);\n    var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);\n    var newMap = new (speciesConstructor(map, getBuiltIn('Map')))();\n    var setter = aFunction(newMap.set);\n    iterate(iterator, function (key, value) {\n      setter.call(newMap, boundFunction(value, key, map), value);\n    }, undefined, true, true);\n    return newMap;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar getBuiltIn = require('../internals/get-built-in');\nvar anObject = require('../internals/an-object');\nvar aFunction = require('../internals/a-function');\nvar bind = require('../internals/function-bind-context');\nvar speciesConstructor = require('../internals/species-constructor');\nvar getMapIterator = require('../internals/get-map-iterator');\nvar iterate = require('../internals/iterate');\n\n// `Map.prototype.mapValues` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'Map', proto: true, real: true, forced: IS_PURE }, {\n  mapValues: function mapValues(callbackfn /* , thisArg */) {\n    var map = anObject(this);\n    var iterator = getMapIterator(map);\n    var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);\n    var newMap = new (speciesConstructor(map, getBuiltIn('Map')))();\n    var setter = aFunction(newMap.set);\n    iterate(iterator, function (key, value) {\n      setter.call(newMap, key, boundFunction(value, key, map));\n    }, undefined, true, true);\n    return newMap;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar anObject = require('../internals/an-object');\nvar aFunction = require('../internals/a-function');\nvar iterate = require('../internals/iterate');\n\n// `Map.prototype.merge` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'Map', proto: true, real: true, forced: IS_PURE }, {\n  // eslint-disable-next-line no-unused-vars\n  merge: function merge(iterable /* ...iterbles */) {\n    var map = anObject(this);\n    var setter = aFunction(map.set);\n    var i = 0;\n    while (i < arguments.length) {\n      iterate(arguments[i++], setter, map, true);\n    }\n    return map;\n  }\n});\n","var $ = require('../internals/export');\nvar of = require('../internals/collection-of');\n\n// `Map.of` method\n// https://tc39.github.io/proposal-setmap-offrom/#sec-map.of\n$({ target: 'Map', stat: true }, {\n  of: of\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar anObject = require('../internals/an-object');\nvar aFunction = require('../internals/a-function');\nvar getMapIterator = require('../internals/get-map-iterator');\nvar iterate = require('../internals/iterate');\n\n// `Map.prototype.reduce` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'Map', proto: true, real: true, forced: IS_PURE }, {\n  reduce: function reduce(callbackfn /* , initialValue */) {\n    var map = anObject(this);\n    var iterator = getMapIterator(map);\n    var noInitial = arguments.length < 2;\n    var accumulator = noInitial ? undefined : arguments[1];\n    aFunction(callbackfn);\n    iterate(iterator, function (key, value) {\n      if (noInitial) {\n        noInitial = false;\n        accumulator = value;\n      } else {\n        accumulator = callbackfn(accumulator, value, key, map);\n      }\n    }, undefined, true, true);\n    if (noInitial) throw TypeError('Reduce of empty map with no initial value');\n    return accumulator;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar anObject = require('../internals/an-object');\nvar bind = require('../internals/function-bind-context');\nvar getMapIterator = require('../internals/get-map-iterator');\nvar iterate = require('../internals/iterate');\n\n// `Set.prototype.some` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'Map', proto: true, real: true, forced: IS_PURE }, {\n  some: function some(callbackfn /* , thisArg */) {\n    var map = anObject(this);\n    var iterator = getMapIterator(map);\n    var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);\n    return iterate(iterator, function (key, value) {\n      if (boundFunction(value, key, map)) return iterate.stop();\n    }, undefined, true, true).stopped;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar anObject = require('../internals/an-object');\nvar aFunction = require('../internals/a-function');\n\n// `Set.prototype.update` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'Map', proto: true, real: true, forced: IS_PURE }, {\n  update: function update(key, callback /* , thunk */) {\n    var map = anObject(this);\n    var length = arguments.length;\n    aFunction(callback);\n    var isPresentInMap = map.has(key);\n    if (!isPresentInMap && length < 3) {\n      throw TypeError('Updating absent value');\n    }\n    var value = isPresentInMap ? map.get(key) : aFunction(length > 2 ? arguments[2] : undefined)(key, map);\n    map.set(key, callback(value, key, map));\n    return map;\n  }\n});\n","var $ = require('../internals/export');\n\nvar min = Math.min;\nvar max = Math.max;\n\n// `Math.clamp` method\n// https://rwaldron.github.io/proposal-math-extensions/\n$({ target: 'Math', stat: true }, {\n  clamp: function clamp(x, lower, upper) {\n    return min(upper, max(lower, x));\n  }\n});\n","var $ = require('../internals/export');\n\n// `Math.DEG_PER_RAD` constant\n// https://rwaldron.github.io/proposal-math-extensions/\n$({ target: 'Math', stat: true }, {\n  DEG_PER_RAD: Math.PI / 180\n});\n","var $ = require('../internals/export');\n\nvar RAD_PER_DEG = 180 / Math.PI;\n\n// `Math.degrees` method\n// https://rwaldron.github.io/proposal-math-extensions/\n$({ target: 'Math', stat: true }, {\n  degrees: function degrees(radians) {\n    return radians * RAD_PER_DEG;\n  }\n});\n","var $ = require('../internals/export');\n\nvar scale = require('../internals/math-scale');\nvar fround = require('../internals/math-fround');\n\n// `Math.fscale` method\n// https://rwaldron.github.io/proposal-math-extensions/\n$({ target: 'Math', stat: true }, {\n  fscale: function fscale(x, inLow, inHigh, outLow, outHigh) {\n    return fround(scale(x, inLow, inHigh, outLow, outHigh));\n  }\n});\n","var $ = require('../internals/export');\n\n// `Math.iaddh` method\n// https://gist.github.com/BrendanEich/4294d5c212a6d2254703\n// TODO: Remove from `core-js@4`\n$({ target: 'Math', stat: true }, {\n  iaddh: function iaddh(x0, x1, y0, y1) {\n    var $x0 = x0 >>> 0;\n    var $x1 = x1 >>> 0;\n    var $y0 = y0 >>> 0;\n    return $x1 + (y1 >>> 0) + (($x0 & $y0 | ($x0 | $y0) & ~($x0 + $y0 >>> 0)) >>> 31) | 0;\n  }\n});\n","var $ = require('../internals/export');\n\n// `Math.imulh` method\n// https://gist.github.com/BrendanEich/4294d5c212a6d2254703\n// TODO: Remove from `core-js@4`\n$({ target: 'Math', stat: true }, {\n  imulh: function imulh(u, v) {\n    var UINT16 = 0xFFFF;\n    var $u = +u;\n    var $v = +v;\n    var u0 = $u & UINT16;\n    var v0 = $v & UINT16;\n    var u1 = $u >> 16;\n    var v1 = $v >> 16;\n    var t = (u1 * v0 >>> 0) + (u0 * v0 >>> 16);\n    return u1 * v1 + (t >> 16) + ((u0 * v1 >>> 0) + (t & UINT16) >> 16);\n  }\n});\n","var $ = require('../internals/export');\n\n// `Math.isubh` method\n// https://gist.github.com/BrendanEich/4294d5c212a6d2254703\n// TODO: Remove from `core-js@4`\n$({ target: 'Math', stat: true }, {\n  isubh: function isubh(x0, x1, y0, y1) {\n    var $x0 = x0 >>> 0;\n    var $x1 = x1 >>> 0;\n    var $y0 = y0 >>> 0;\n    return $x1 - (y1 >>> 0) - ((~$x0 & $y0 | ~($x0 ^ $y0) & $x0 - $y0 >>> 0) >>> 31) | 0;\n  }\n});\n","var $ = require('../internals/export');\n\n// `Math.RAD_PER_DEG` constant\n// https://rwaldron.github.io/proposal-math-extensions/\n$({ target: 'Math', stat: true }, {\n  RAD_PER_DEG: 180 / Math.PI\n});\n","var $ = require('../internals/export');\n\nvar DEG_PER_RAD = Math.PI / 180;\n\n// `Math.radians` method\n// https://rwaldron.github.io/proposal-math-extensions/\n$({ target: 'Math', stat: true }, {\n  radians: function radians(degrees) {\n    return degrees * DEG_PER_RAD;\n  }\n});\n","var $ = require('../internals/export');\nvar scale = require('../internals/math-scale');\n\n// `Math.scale` method\n// https://rwaldron.github.io/proposal-math-extensions/\n$({ target: 'Math', stat: true }, {\n  scale: scale\n});\n","var $ = require('../internals/export');\nvar anObject = require('../internals/an-object');\nvar numberIsFinite = require('../internals/number-is-finite');\nvar createIteratorConstructor = require('../internals/create-iterator-constructor');\nvar InternalStateModule = require('../internals/internal-state');\n\nvar SEEDED_RANDOM = 'Seeded Random';\nvar SEEDED_RANDOM_GENERATOR = SEEDED_RANDOM + ' Generator';\nvar setInternalState = InternalStateModule.set;\nvar getInternalState = InternalStateModule.getterFor(SEEDED_RANDOM_GENERATOR);\nvar SEED_TYPE_ERROR = 'Math.seededPRNG() argument should have a \"seed\" field with a finite value.';\n\nvar $SeededRandomGenerator = createIteratorConstructor(function SeededRandomGenerator(seed) {\n  setInternalState(this, {\n    type: SEEDED_RANDOM_GENERATOR,\n    seed: seed % 2147483647\n  });\n}, SEEDED_RANDOM, function next() {\n  var state = getInternalState(this);\n  var seed = state.seed = (state.seed * 1103515245 + 12345) % 2147483647;\n  return { value: (seed & 1073741823) / 1073741823, done: false };\n});\n\n// `Math.seededPRNG` method\n// https://github.com/tc39/proposal-seeded-random\n// based on https://github.com/tc39/proposal-seeded-random/blob/78b8258835b57fc2100d076151ab506bc3202ae6/demo.html\n$({ target: 'Math', stat: true, forced: true }, {\n  seededPRNG: function seededPRNG(it) {\n    var seed = anObject(it).seed;\n    if (!numberIsFinite(seed)) throw TypeError(SEED_TYPE_ERROR);\n    return new $SeededRandomGenerator(seed);\n  }\n});\n","var $ = require('../internals/export');\n\n// `Math.signbit` method\n// https://github.com/tc39/proposal-Math.signbit\n$({ target: 'Math', stat: true }, {\n  signbit: function signbit(x) {\n    return (x = +x) == x && x == 0 ? 1 / x == -Infinity : x < 0;\n  }\n});\n","var $ = require('../internals/export');\n\n// `Math.umulh` method\n// https://gist.github.com/BrendanEich/4294d5c212a6d2254703\n// TODO: Remove from `core-js@4`\n$({ target: 'Math', stat: true }, {\n  umulh: function umulh(u, v) {\n    var UINT16 = 0xFFFF;\n    var $u = +u;\n    var $v = +v;\n    var u0 = $u & UINT16;\n    var v0 = $v & UINT16;\n    var u1 = $u >>> 16;\n    var v1 = $v >>> 16;\n    var t = (u1 * v0 >>> 0) + (u0 * v0 >>> 16);\n    return u1 * v1 + (t >>> 16) + ((u0 * v1 >>> 0) + (t & UINT16) >>> 16);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar toInteger = require('../internals/to-integer');\nvar parseInt = require('../internals/number-parse-int');\n\nvar INVALID_NUMBER_REPRESENTATION = 'Invalid number representation';\nvar INVALID_RADIX = 'Invalid radix';\nvar valid = /^[\\da-z]+$/;\n\n// `Number.fromString` method\n// https://github.com/tc39/proposal-number-fromstring\n$({ target: 'Number', stat: true }, {\n  fromString: function fromString(string, radix) {\n    var sign = 1;\n    var R, mathNum;\n    if (typeof string != 'string') throw TypeError(INVALID_NUMBER_REPRESENTATION);\n    if (!string.length) throw SyntaxError(INVALID_NUMBER_REPRESENTATION);\n    if (string.charAt(0) == '-') {\n      sign = -1;\n      string = string.slice(1);\n      if (!string.length) throw SyntaxError(INVALID_NUMBER_REPRESENTATION);\n    }\n    R = radix === undefined ? 10 : toInteger(radix);\n    if (R < 2 || R > 36) throw RangeError(INVALID_RADIX);\n    if (!valid.test(string) || (mathNum = parseInt(string, R)).toString(R) !== string) {\n      throw SyntaxError(INVALID_NUMBER_REPRESENTATION);\n    }\n    return sign * mathNum;\n  }\n});\n","'use strict';\n// https://github.com/tc39/proposal-observable\nvar $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar setSpecies = require('../internals/set-species');\nvar aFunction = require('../internals/a-function');\nvar anObject = require('../internals/an-object');\nvar isObject = require('../internals/is-object');\nvar anInstance = require('../internals/an-instance');\nvar defineProperty = require('../internals/object-define-property').f;\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar redefineAll = require('../internals/redefine-all');\nvar getIterator = require('../internals/get-iterator');\nvar iterate = require('../internals/iterate');\nvar hostReportErrors = require('../internals/host-report-errors');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar InternalStateModule = require('../internals/internal-state');\n\nvar OBSERVABLE = wellKnownSymbol('observable');\nvar getInternalState = InternalStateModule.get;\nvar setInternalState = InternalStateModule.set;\n\nvar getMethod = function (fn) {\n  return fn == null ? undefined : aFunction(fn);\n};\n\nvar cleanupSubscription = function (subscriptionState) {\n  var cleanup = subscriptionState.cleanup;\n  if (cleanup) {\n    subscriptionState.cleanup = undefined;\n    try {\n      cleanup();\n    } catch (error) {\n      hostReportErrors(error);\n    }\n  }\n};\n\nvar subscriptionClosed = function (subscriptionState) {\n  return subscriptionState.observer === undefined;\n};\n\nvar close = function (subscription, subscriptionState) {\n  if (!DESCRIPTORS) {\n    subscription.closed = true;\n    var subscriptionObserver = subscriptionState.subscriptionObserver;\n    if (subscriptionObserver) subscriptionObserver.closed = true;\n  } subscriptionState.observer = undefined;\n};\n\nvar Subscription = function (observer, subscriber) {\n  var subscriptionState = setInternalState(this, {\n    cleanup: undefined,\n    observer: anObject(observer),\n    subscriptionObserver: undefined\n  });\n  var start;\n  if (!DESCRIPTORS) this.closed = false;\n  try {\n    if (start = getMethod(observer.start)) start.call(observer, this);\n  } catch (error) {\n    hostReportErrors(error);\n  }\n  if (subscriptionClosed(subscriptionState)) return;\n  var subscriptionObserver = subscriptionState.subscriptionObserver = new SubscriptionObserver(this);\n  try {\n    var cleanup = subscriber(subscriptionObserver);\n    var subscription = cleanup;\n    if (cleanup != null) subscriptionState.cleanup = typeof cleanup.unsubscribe === 'function'\n      ? function () { subscription.unsubscribe(); }\n      : aFunction(cleanup);\n  } catch (error) {\n    subscriptionObserver.error(error);\n    return;\n  } if (subscriptionClosed(subscriptionState)) cleanupSubscription(subscriptionState);\n};\n\nSubscription.prototype = redefineAll({}, {\n  unsubscribe: function unsubscribe() {\n    var subscriptionState = getInternalState(this);\n    if (!subscriptionClosed(subscriptionState)) {\n      close(this, subscriptionState);\n      cleanupSubscription(subscriptionState);\n    }\n  }\n});\n\nif (DESCRIPTORS) defineProperty(Subscription.prototype, 'closed', {\n  configurable: true,\n  get: function () {\n    return subscriptionClosed(getInternalState(this));\n  }\n});\n\nvar SubscriptionObserver = function (subscription) {\n  setInternalState(this, { subscription: subscription });\n  if (!DESCRIPTORS) this.closed = false;\n};\n\nSubscriptionObserver.prototype = redefineAll({}, {\n  next: function next(value) {\n    var subscriptionState = getInternalState(getInternalState(this).subscription);\n    if (!subscriptionClosed(subscriptionState)) {\n      var observer = subscriptionState.observer;\n      try {\n        var nextMethod = getMethod(observer.next);\n        if (nextMethod) nextMethod.call(observer, value);\n      } catch (error) {\n        hostReportErrors(error);\n      }\n    }\n  },\n  error: function error(value) {\n    var subscription = getInternalState(this).subscription;\n    var subscriptionState = getInternalState(subscription);\n    if (!subscriptionClosed(subscriptionState)) {\n      var observer = subscriptionState.observer;\n      close(subscription, subscriptionState);\n      try {\n        var errorMethod = getMethod(observer.error);\n        if (errorMethod) errorMethod.call(observer, value);\n        else hostReportErrors(value);\n      } catch (err) {\n        hostReportErrors(err);\n      } cleanupSubscription(subscriptionState);\n    }\n  },\n  complete: function complete() {\n    var subscription = getInternalState(this).subscription;\n    var subscriptionState = getInternalState(subscription);\n    if (!subscriptionClosed(subscriptionState)) {\n      var observer = subscriptionState.observer;\n      close(subscription, subscriptionState);\n      try {\n        var completeMethod = getMethod(observer.complete);\n        if (completeMethod) completeMethod.call(observer);\n      } catch (error) {\n        hostReportErrors(error);\n      } cleanupSubscription(subscriptionState);\n    }\n  }\n});\n\nif (DESCRIPTORS) defineProperty(SubscriptionObserver.prototype, 'closed', {\n  configurable: true,\n  get: function () {\n    return subscriptionClosed(getInternalState(getInternalState(this).subscription));\n  }\n});\n\nvar $Observable = function Observable(subscriber) {\n  anInstance(this, $Observable, 'Observable');\n  setInternalState(this, { subscriber: aFunction(subscriber) });\n};\n\nredefineAll($Observable.prototype, {\n  subscribe: function subscribe(observer) {\n    var length = arguments.length;\n    return new Subscription(typeof observer === 'function' ? {\n      next: observer,\n      error: length > 1 ? arguments[1] : undefined,\n      complete: length > 2 ? arguments[2] : undefined\n    } : isObject(observer) ? observer : {}, getInternalState(this).subscriber);\n  }\n});\n\nredefineAll($Observable, {\n  from: function from(x) {\n    var C = typeof this === 'function' ? this : $Observable;\n    var observableMethod = getMethod(anObject(x)[OBSERVABLE]);\n    if (observableMethod) {\n      var observable = anObject(observableMethod.call(x));\n      return observable.constructor === C ? observable : new C(function (observer) {\n        return observable.subscribe(observer);\n      });\n    }\n    var iterator = getIterator(x);\n    return new C(function (observer) {\n      iterate(iterator, function (it) {\n        observer.next(it);\n        if (observer.closed) return iterate.stop();\n      }, undefined, false, true);\n      observer.complete();\n    });\n  },\n  of: function of() {\n    var C = typeof this === 'function' ? this : $Observable;\n    var length = arguments.length;\n    var items = new Array(length);\n    var index = 0;\n    while (index < length) items[index] = arguments[index++];\n    return new C(function (observer) {\n      for (var i = 0; i < length; i++) {\n        observer.next(items[i]);\n        if (observer.closed) return;\n      } observer.complete();\n    });\n  }\n});\n\ncreateNonEnumerableProperty($Observable.prototype, OBSERVABLE, function () { return this; });\n\n$({ global: true }, {\n  Observable: $Observable\n});\n\nsetSpecies('Observable');\n","// TODO: Remove from `core-js@4`\nrequire('./es.promise.all-settled.js');\n","'use strict';\nvar $ = require('../internals/export');\nvar aFunction = require('../internals/a-function');\nvar getBuiltIn = require('../internals/get-built-in');\nvar newPromiseCapabilityModule = require('../internals/new-promise-capability');\nvar perform = require('../internals/perform');\nvar iterate = require('../internals/iterate');\n\nvar PROMISE_ANY_ERROR = 'No one promise resolved';\n\n// `Promise.any` method\n// https://github.com/tc39/proposal-promise-any\n$({ target: 'Promise', stat: true }, {\n  any: function any(iterable) {\n    var C = this;\n    var capability = newPromiseCapabilityModule.f(C);\n    var resolve = capability.resolve;\n    var reject = capability.reject;\n    var result = perform(function () {\n      var promiseResolve = aFunction(C.resolve);\n      var errors = [];\n      var counter = 0;\n      var remaining = 1;\n      var alreadyResolved = false;\n      iterate(iterable, function (promise) {\n        var index = counter++;\n        var alreadyRejected = false;\n        errors.push(undefined);\n        remaining++;\n        promiseResolve.call(C, promise).then(function (value) {\n          if (alreadyRejected || alreadyResolved) return;\n          alreadyResolved = true;\n          resolve(value);\n        }, function (e) {\n          if (alreadyRejected || alreadyResolved) return;\n          alreadyRejected = true;\n          errors[index] = e;\n          --remaining || reject(new (getBuiltIn('AggregateError'))(errors, PROMISE_ANY_ERROR));\n        });\n      });\n      --remaining || reject(new (getBuiltIn('AggregateError'))(errors, PROMISE_ANY_ERROR));\n    });\n    if (result.error) reject(result.value);\n    return capability.promise;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar newPromiseCapabilityModule = require('../internals/new-promise-capability');\nvar perform = require('../internals/perform');\n\n// `Promise.try` method\n// https://github.com/tc39/proposal-promise-try\n$({ target: 'Promise', stat: true }, {\n  'try': function (callbackfn) {\n    var promiseCapability = newPromiseCapabilityModule.f(this);\n    var result = perform(callbackfn);\n    (result.error ? promiseCapability.reject : promiseCapability.resolve)(result.value);\n    return promiseCapability.promise;\n  }\n});\n","var $ = require('../internals/export');\nvar ReflectMetadataModule = require('../internals/reflect-metadata');\nvar anObject = require('../internals/an-object');\n\nvar toMetadataKey = ReflectMetadataModule.toKey;\nvar ordinaryDefineOwnMetadata = ReflectMetadataModule.set;\n\n// `Reflect.defineMetadata` method\n// https://github.com/rbuckton/reflect-metadata\n$({ target: 'Reflect', stat: true }, {\n  defineMetadata: function defineMetadata(metadataKey, metadataValue, target /* , targetKey */) {\n    var targetKey = arguments.length < 4 ? undefined : toMetadataKey(arguments[3]);\n    ordinaryDefineOwnMetadata(metadataKey, metadataValue, anObject(target), targetKey);\n  }\n});\n","var $ = require('../internals/export');\nvar ReflectMetadataModule = require('../internals/reflect-metadata');\nvar anObject = require('../internals/an-object');\n\nvar toMetadataKey = ReflectMetadataModule.toKey;\nvar getOrCreateMetadataMap = ReflectMetadataModule.getMap;\nvar store = ReflectMetadataModule.store;\n\n// `Reflect.deleteMetadata` method\n// https://github.com/rbuckton/reflect-metadata\n$({ target: 'Reflect', stat: true }, {\n  deleteMetadata: function deleteMetadata(metadataKey, target /* , targetKey */) {\n    var targetKey = arguments.length < 3 ? undefined : toMetadataKey(arguments[2]);\n    var metadataMap = getOrCreateMetadataMap(anObject(target), targetKey, false);\n    if (metadataMap === undefined || !metadataMap['delete'](metadataKey)) return false;\n    if (metadataMap.size) return true;\n    var targetMetadata = store.get(target);\n    targetMetadata['delete'](targetKey);\n    return !!targetMetadata.size || store['delete'](target);\n  }\n});\n","var $ = require('../internals/export');\n// TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`\nvar Set = require('../modules/es.set');\nvar ReflectMetadataModule = require('../internals/reflect-metadata');\nvar anObject = require('../internals/an-object');\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\nvar iterate = require('../internals/iterate');\n\nvar ordinaryOwnMetadataKeys = ReflectMetadataModule.keys;\nvar toMetadataKey = ReflectMetadataModule.toKey;\n\nvar from = function (iter) {\n  var result = [];\n  iterate(iter, result.push, result);\n  return result;\n};\n\nvar ordinaryMetadataKeys = function (O, P) {\n  var oKeys = ordinaryOwnMetadataKeys(O, P);\n  var parent = getPrototypeOf(O);\n  if (parent === null) return oKeys;\n  var pKeys = ordinaryMetadataKeys(parent, P);\n  return pKeys.length ? oKeys.length ? from(new Set(oKeys.concat(pKeys))) : pKeys : oKeys;\n};\n\n// `Reflect.getMetadataKeys` method\n// https://github.com/rbuckton/reflect-metadata\n$({ target: 'Reflect', stat: true }, {\n  getMetadataKeys: function getMetadataKeys(target /* , targetKey */) {\n    var targetKey = arguments.length < 2 ? undefined : toMetadataKey(arguments[1]);\n    return ordinaryMetadataKeys(anObject(target), targetKey);\n  }\n});\n","var $ = require('../internals/export');\nvar ReflectMetadataModule = require('../internals/reflect-metadata');\nvar anObject = require('../internals/an-object');\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\n\nvar ordinaryHasOwnMetadata = ReflectMetadataModule.has;\nvar ordinaryGetOwnMetadata = ReflectMetadataModule.get;\nvar toMetadataKey = ReflectMetadataModule.toKey;\n\nvar ordinaryGetMetadata = function (MetadataKey, O, P) {\n  var hasOwn = ordinaryHasOwnMetadata(MetadataKey, O, P);\n  if (hasOwn) return ordinaryGetOwnMetadata(MetadataKey, O, P);\n  var parent = getPrototypeOf(O);\n  return parent !== null ? ordinaryGetMetadata(MetadataKey, parent, P) : undefined;\n};\n\n// `Reflect.getMetadata` method\n// https://github.com/rbuckton/reflect-metadata\n$({ target: 'Reflect', stat: true }, {\n  getMetadata: function getMetadata(metadataKey, target /* , targetKey */) {\n    var targetKey = arguments.length < 3 ? undefined : toMetadataKey(arguments[2]);\n    return ordinaryGetMetadata(metadataKey, anObject(target), targetKey);\n  }\n});\n","var $ = require('../internals/export');\nvar ReflectMetadataModule = require('../internals/reflect-metadata');\nvar anObject = require('../internals/an-object');\n\nvar ordinaryOwnMetadataKeys = ReflectMetadataModule.keys;\nvar toMetadataKey = ReflectMetadataModule.toKey;\n\n// `Reflect.getOwnMetadataKeys` method\n// https://github.com/rbuckton/reflect-metadata\n$({ target: 'Reflect', stat: true }, {\n  getOwnMetadataKeys: function getOwnMetadataKeys(target /* , targetKey */) {\n    var targetKey = arguments.length < 2 ? undefined : toMetadataKey(arguments[1]);\n    return ordinaryOwnMetadataKeys(anObject(target), targetKey);\n  }\n});\n","var $ = require('../internals/export');\nvar ReflectMetadataModule = require('../internals/reflect-metadata');\nvar anObject = require('../internals/an-object');\n\nvar ordinaryGetOwnMetadata = ReflectMetadataModule.get;\nvar toMetadataKey = ReflectMetadataModule.toKey;\n\n// `Reflect.getOwnMetadata` method\n// https://github.com/rbuckton/reflect-metadata\n$({ target: 'Reflect', stat: true }, {\n  getOwnMetadata: function getOwnMetadata(metadataKey, target /* , targetKey */) {\n    var targetKey = arguments.length < 3 ? undefined : toMetadataKey(arguments[2]);\n    return ordinaryGetOwnMetadata(metadataKey, anObject(target), targetKey);\n  }\n});\n","var $ = require('../internals/export');\nvar ReflectMetadataModule = require('../internals/reflect-metadata');\nvar anObject = require('../internals/an-object');\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\n\nvar ordinaryHasOwnMetadata = ReflectMetadataModule.has;\nvar toMetadataKey = ReflectMetadataModule.toKey;\n\nvar ordinaryHasMetadata = function (MetadataKey, O, P) {\n  var hasOwn = ordinaryHasOwnMetadata(MetadataKey, O, P);\n  if (hasOwn) return true;\n  var parent = getPrototypeOf(O);\n  return parent !== null ? ordinaryHasMetadata(MetadataKey, parent, P) : false;\n};\n\n// `Reflect.hasMetadata` method\n// https://github.com/rbuckton/reflect-metadata\n$({ target: 'Reflect', stat: true }, {\n  hasMetadata: function hasMetadata(metadataKey, target /* , targetKey */) {\n    var targetKey = arguments.length < 3 ? undefined : toMetadataKey(arguments[2]);\n    return ordinaryHasMetadata(metadataKey, anObject(target), targetKey);\n  }\n});\n","var $ = require('../internals/export');\nvar ReflectMetadataModule = require('../internals/reflect-metadata');\nvar anObject = require('../internals/an-object');\n\nvar ordinaryHasOwnMetadata = ReflectMetadataModule.has;\nvar toMetadataKey = ReflectMetadataModule.toKey;\n\n// `Reflect.hasOwnMetadata` method\n// https://github.com/rbuckton/reflect-metadata\n$({ target: 'Reflect', stat: true }, {\n  hasOwnMetadata: function hasOwnMetadata(metadataKey, target /* , targetKey */) {\n    var targetKey = arguments.length < 3 ? undefined : toMetadataKey(arguments[2]);\n    return ordinaryHasOwnMetadata(metadataKey, anObject(target), targetKey);\n  }\n});\n","var $ = require('../internals/export');\nvar ReflectMetadataModule = require('../internals/reflect-metadata');\nvar anObject = require('../internals/an-object');\n\nvar toMetadataKey = ReflectMetadataModule.toKey;\nvar ordinaryDefineOwnMetadata = ReflectMetadataModule.set;\n\n// `Reflect.metadata` method\n// https://github.com/rbuckton/reflect-metadata\n$({ target: 'Reflect', stat: true }, {\n  metadata: function metadata(metadataKey, metadataValue) {\n    return function decorator(target, key) {\n      ordinaryDefineOwnMetadata(metadataKey, metadataValue, anObject(target), toMetadataKey(key));\n    };\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar collectionAddAll = require('../internals/collection-add-all');\n\n// `Set.prototype.addAll` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'Set', proto: true, real: true, forced: IS_PURE }, {\n  addAll: function addAll(/* ...elements */) {\n    return collectionAddAll.apply(this, arguments);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar collectionDeleteAll = require('../internals/collection-delete-all');\n\n// `Set.prototype.deleteAll` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'Set', proto: true, real: true, forced: IS_PURE }, {\n  deleteAll: function deleteAll(/* ...elements */) {\n    return collectionDeleteAll.apply(this, arguments);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar getBuiltIn = require('../internals/get-built-in');\nvar anObject = require('../internals/an-object');\nvar aFunction = require('../internals/a-function');\nvar speciesConstructor = require('../internals/species-constructor');\nvar iterate = require('../internals/iterate');\n\n// `Set.prototype.difference` method\n// https://github.com/tc39/proposal-set-methods\n$({ target: 'Set', proto: true, real: true, forced: IS_PURE }, {\n  difference: function difference(iterable) {\n    var set = anObject(this);\n    var newSet = new (speciesConstructor(set, getBuiltIn('Set')))(set);\n    var remover = aFunction(newSet['delete']);\n    iterate(iterable, function (value) {\n      remover.call(newSet, value);\n    });\n    return newSet;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar anObject = require('../internals/an-object');\nvar bind = require('../internals/function-bind-context');\nvar getSetIterator = require('../internals/get-set-iterator');\nvar iterate = require('../internals/iterate');\n\n// `Set.prototype.every` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'Set', proto: true, real: true, forced: IS_PURE }, {\n  every: function every(callbackfn /* , thisArg */) {\n    var set = anObject(this);\n    var iterator = getSetIterator(set);\n    var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);\n    return !iterate(iterator, function (value) {\n      if (!boundFunction(value, value, set)) return iterate.stop();\n    }, undefined, false, true).stopped;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar getBuiltIn = require('../internals/get-built-in');\nvar anObject = require('../internals/an-object');\nvar aFunction = require('../internals/a-function');\nvar bind = require('../internals/function-bind-context');\nvar speciesConstructor = require('../internals/species-constructor');\nvar getSetIterator = require('../internals/get-set-iterator');\nvar iterate = require('../internals/iterate');\n\n// `Set.prototype.filter` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'Set', proto: true, real: true, forced: IS_PURE }, {\n  filter: function filter(callbackfn /* , thisArg */) {\n    var set = anObject(this);\n    var iterator = getSetIterator(set);\n    var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);\n    var newSet = new (speciesConstructor(set, getBuiltIn('Set')))();\n    var adder = aFunction(newSet.add);\n    iterate(iterator, function (value) {\n      if (boundFunction(value, value, set)) adder.call(newSet, value);\n    }, undefined, false, true);\n    return newSet;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar anObject = require('../internals/an-object');\nvar bind = require('../internals/function-bind-context');\nvar getSetIterator = require('../internals/get-set-iterator');\nvar iterate = require('../internals/iterate');\n\n// `Set.prototype.find` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'Set', proto: true, real: true, forced: IS_PURE }, {\n  find: function find(callbackfn /* , thisArg */) {\n    var set = anObject(this);\n    var iterator = getSetIterator(set);\n    var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);\n    return iterate(iterator, function (value) {\n      if (boundFunction(value, value, set)) return iterate.stop(value);\n    }, undefined, false, true).result;\n  }\n});\n","var $ = require('../internals/export');\nvar from = require('../internals/collection-from');\n\n// `Set.from` method\n// https://tc39.github.io/proposal-setmap-offrom/#sec-set.from\n$({ target: 'Set', stat: true }, {\n  from: from\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar getBuiltIn = require('../internals/get-built-in');\nvar anObject = require('../internals/an-object');\nvar aFunction = require('../internals/a-function');\nvar speciesConstructor = require('../internals/species-constructor');\nvar iterate = require('../internals/iterate');\n\n// `Set.prototype.intersection` method\n// https://github.com/tc39/proposal-set-methods\n$({ target: 'Set', proto: true, real: true, forced: IS_PURE }, {\n  intersection: function intersection(iterable) {\n    var set = anObject(this);\n    var newSet = new (speciesConstructor(set, getBuiltIn('Set')))();\n    var hasCheck = aFunction(set.has);\n    var adder = aFunction(newSet.add);\n    iterate(iterable, function (value) {\n      if (hasCheck.call(set, value)) adder.call(newSet, value);\n    });\n    return newSet;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar anObject = require('../internals/an-object');\nvar aFunction = require('../internals/a-function');\nvar iterate = require('../internals/iterate');\n\n// `Set.prototype.isDisjointFrom` method\n// https://tc39.github.io/proposal-set-methods/#Set.prototype.isDisjointFrom\n$({ target: 'Set', proto: true, real: true, forced: IS_PURE }, {\n  isDisjointFrom: function isDisjointFrom(iterable) {\n    var set = anObject(this);\n    var hasCheck = aFunction(set.has);\n    return !iterate(iterable, function (value) {\n      if (hasCheck.call(set, value) === true) return iterate.stop();\n    }).stopped;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar getBuiltIn = require('../internals/get-built-in');\nvar anObject = require('../internals/an-object');\nvar aFunction = require('../internals/a-function');\nvar getIterator = require('../internals/get-iterator');\nvar iterate = require('../internals/iterate');\n\n// `Set.prototype.isSubsetOf` method\n// https://tc39.github.io/proposal-set-methods/#Set.prototype.isSubsetOf\n$({ target: 'Set', proto: true, real: true, forced: IS_PURE }, {\n  isSubsetOf: function isSubsetOf(iterable) {\n    var iterator = getIterator(this);\n    var otherSet = anObject(iterable);\n    var hasCheck = otherSet.has;\n    if (typeof hasCheck != 'function') {\n      otherSet = new (getBuiltIn('Set'))(iterable);\n      hasCheck = aFunction(otherSet.has);\n    }\n    return !iterate(iterator, function (value) {\n      if (hasCheck.call(otherSet, value) === false) return iterate.stop();\n    }, undefined, false, true).stopped;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar anObject = require('../internals/an-object');\nvar aFunction = require('../internals/a-function');\nvar iterate = require('../internals/iterate');\n\n// `Set.prototype.isSupersetOf` method\n// https://tc39.github.io/proposal-set-methods/#Set.prototype.isSupersetOf\n$({ target: 'Set', proto: true, real: true, forced: IS_PURE }, {\n  isSupersetOf: function isSupersetOf(iterable) {\n    var set = anObject(this);\n    var hasCheck = aFunction(set.has);\n    return !iterate(iterable, function (value) {\n      if (hasCheck.call(set, value) === false) return iterate.stop();\n    }).stopped;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar anObject = require('../internals/an-object');\nvar getSetIterator = require('../internals/get-set-iterator');\nvar iterate = require('../internals/iterate');\n\n// `Set.prototype.join` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'Set', proto: true, real: true, forced: IS_PURE }, {\n  join: function join(separator) {\n    var set = anObject(this);\n    var iterator = getSetIterator(set);\n    var sep = separator === undefined ? ',' : String(separator);\n    var result = [];\n    iterate(iterator, result.push, result, false, true);\n    return result.join(sep);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar getBuiltIn = require('../internals/get-built-in');\nvar anObject = require('../internals/an-object');\nvar aFunction = require('../internals/a-function');\nvar bind = require('../internals/function-bind-context');\nvar speciesConstructor = require('../internals/species-constructor');\nvar getSetIterator = require('../internals/get-set-iterator');\nvar iterate = require('../internals/iterate');\n\n// `Set.prototype.map` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'Set', proto: true, real: true, forced: IS_PURE }, {\n  map: function map(callbackfn /* , thisArg */) {\n    var set = anObject(this);\n    var iterator = getSetIterator(set);\n    var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);\n    var newSet = new (speciesConstructor(set, getBuiltIn('Set')))();\n    var adder = aFunction(newSet.add);\n    iterate(iterator, function (value) {\n      adder.call(newSet, boundFunction(value, value, set));\n    }, undefined, false, true);\n    return newSet;\n  }\n});\n","var $ = require('../internals/export');\nvar of = require('../internals/collection-of');\n\n// `Set.of` method\n// https://tc39.github.io/proposal-setmap-offrom/#sec-set.of\n$({ target: 'Set', stat: true }, {\n  of: of\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar anObject = require('../internals/an-object');\nvar aFunction = require('../internals/a-function');\nvar getSetIterator = require('../internals/get-set-iterator');\nvar iterate = require('../internals/iterate');\n\n// `Set.prototype.reduce` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'Set', proto: true, real: true, forced: IS_PURE }, {\n  reduce: function reduce(callbackfn /* , initialValue */) {\n    var set = anObject(this);\n    var iterator = getSetIterator(set);\n    var noInitial = arguments.length < 2;\n    var accumulator = noInitial ? undefined : arguments[1];\n    aFunction(callbackfn);\n    iterate(iterator, function (value) {\n      if (noInitial) {\n        noInitial = false;\n        accumulator = value;\n      } else {\n        accumulator = callbackfn(accumulator, value, value, set);\n      }\n    }, undefined, false, true);\n    if (noInitial) throw TypeError('Reduce of empty set with no initial value');\n    return accumulator;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar anObject = require('../internals/an-object');\nvar bind = require('../internals/function-bind-context');\nvar getSetIterator = require('../internals/get-set-iterator');\nvar iterate = require('../internals/iterate');\n\n// `Set.prototype.some` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'Set', proto: true, real: true, forced: IS_PURE }, {\n  some: function some(callbackfn /* , thisArg */) {\n    var set = anObject(this);\n    var iterator = getSetIterator(set);\n    var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);\n    return iterate(iterator, function (value) {\n      if (boundFunction(value, value, set)) return iterate.stop();\n    }, undefined, false, true).stopped;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar getBuiltIn = require('../internals/get-built-in');\nvar anObject = require('../internals/an-object');\nvar aFunction = require('../internals/a-function');\nvar speciesConstructor = require('../internals/species-constructor');\nvar iterate = require('../internals/iterate');\n\n// `Set.prototype.symmetricDifference` method\n// https://github.com/tc39/proposal-set-methods\n$({ target: 'Set', proto: true, real: true, forced: IS_PURE }, {\n  symmetricDifference: function symmetricDifference(iterable) {\n    var set = anObject(this);\n    var newSet = new (speciesConstructor(set, getBuiltIn('Set')))(set);\n    var remover = aFunction(newSet['delete']);\n    var adder = aFunction(newSet.add);\n    iterate(iterable, function (value) {\n      remover.call(newSet, value) || adder.call(newSet, value);\n    });\n    return newSet;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar getBuiltIn = require('../internals/get-built-in');\nvar anObject = require('../internals/an-object');\nvar aFunction = require('../internals/a-function');\nvar speciesConstructor = require('../internals/species-constructor');\nvar iterate = require('../internals/iterate');\n\n// `Set.prototype.union` method\n// https://github.com/tc39/proposal-set-methods\n$({ target: 'Set', proto: true, real: true, forced: IS_PURE }, {\n  union: function union(iterable) {\n    var set = anObject(this);\n    var newSet = new (speciesConstructor(set, getBuiltIn('Set')))(set);\n    iterate(iterable, aFunction(newSet.add), newSet);\n    return newSet;\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar charAt = require('../internals/string-multibyte').charAt;\n\n// `String.prototype.at` method\n// https://github.com/mathiasbynens/String.prototype.at\n$({ target: 'String', proto: true }, {\n  at: function at(pos) {\n    return charAt(this, pos);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar createIteratorConstructor = require('../internals/create-iterator-constructor');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar InternalStateModule = require('../internals/internal-state');\nvar StringMultibyteModule = require('../internals/string-multibyte');\n\nvar codeAt = StringMultibyteModule.codeAt;\nvar charAt = StringMultibyteModule.charAt;\nvar STRING_ITERATOR = 'String Iterator';\nvar setInternalState = InternalStateModule.set;\nvar getInternalState = InternalStateModule.getterFor(STRING_ITERATOR);\n\n// TODO: unify with String#@@iterator\nvar $StringIterator = createIteratorConstructor(function StringIterator(string) {\n  setInternalState(this, {\n    type: STRING_ITERATOR,\n    string: string,\n    index: 0\n  });\n}, 'String', function next() {\n  var state = getInternalState(this);\n  var string = state.string;\n  var index = state.index;\n  var point;\n  if (index >= string.length) return { value: undefined, done: true };\n  point = charAt(string, index);\n  state.index += point.length;\n  return { value: { codePoint: codeAt(point, 0), position: index }, done: false };\n});\n\n// `String.prototype.codePoints` method\n// https://github.com/tc39/proposal-string-prototype-codepoints\n$({ target: 'String', proto: true }, {\n  codePoints: function codePoints() {\n    return new $StringIterator(String(requireObjectCoercible(this)));\n  }\n});\n","// TODO: Remove from `core-js@4`\nrequire('./es.string.match-all');\n","'use strict';\nvar $ = require('../internals/export');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar isRegExp = require('../internals/is-regexp');\nvar getRegExpFlags = require('../internals/regexp-flags');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar IS_PURE = require('../internals/is-pure');\n\nvar REPLACE = wellKnownSymbol('replace');\nvar RegExpPrototype = RegExp.prototype;\n\n// `String.prototype.replaceAll` method\n// https://github.com/tc39/proposal-string-replace-all\n$({ target: 'String', proto: true }, {\n  replaceAll: function replaceAll(searchValue, replaceValue) {\n    var O = requireObjectCoercible(this);\n    var IS_REG_EXP, flags, replacer, string, searchString, template, result, position, index;\n    if (searchValue != null) {\n      IS_REG_EXP = isRegExp(searchValue);\n      if (IS_REG_EXP) {\n        flags = String(requireObjectCoercible('flags' in RegExpPrototype\n          ? searchValue.flags\n          : getRegExpFlags.call(searchValue)\n        ));\n        if (!~flags.indexOf('g')) throw TypeError('`.replaceAll` does not allow non-global regexes');\n      }\n      replacer = searchValue[REPLACE];\n      if (replacer !== undefined) {\n        return replacer.call(searchValue, O, replaceValue);\n      } else if (IS_PURE && IS_REG_EXP) {\n        return String(O).replace(searchValue, replaceValue);\n      }\n    }\n    string = String(O);\n    searchString = String(searchValue);\n    if (searchString === '') return replaceAll.call(string, /(?:)/g, replaceValue);\n    template = string.split(searchString);\n    if (typeof replaceValue !== 'function') {\n      return template.join(String(replaceValue));\n    }\n    result = template[0];\n    position = result.length;\n    for (index = 1; index < template.length; index++) {\n      result += String(replaceValue(searchString, position, string));\n      position += searchString.length + template[index].length;\n      result += template[index];\n    }\n    return result;\n  }\n});\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.dispose` well-known symbol\n// https://github.com/tc39/proposal-using-statement\ndefineWellKnownSymbol('dispose');\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.observable` well-known symbol\n// https://github.com/tc39/proposal-observable\ndefineWellKnownSymbol('observable');\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.patternMatch` well-known symbol\n// https://github.com/tc39/proposal-pattern-matching\ndefineWellKnownSymbol('patternMatch');\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar collectionDeleteAll = require('../internals/collection-delete-all');\n\n// `WeakMap.prototype.deleteAll` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'WeakMap', proto: true, real: true, forced: IS_PURE }, {\n  deleteAll: function deleteAll(/* ...elements */) {\n    return collectionDeleteAll.apply(this, arguments);\n  }\n});\n","var $ = require('../internals/export');\nvar from = require('../internals/collection-from');\n\n// `WeakMap.from` method\n// https://tc39.github.io/proposal-setmap-offrom/#sec-weakmap.from\n$({ target: 'WeakMap', stat: true }, {\n  from: from\n});\n","var $ = require('../internals/export');\nvar of = require('../internals/collection-of');\n\n// `WeakMap.of` method\n// https://tc39.github.io/proposal-setmap-offrom/#sec-weakmap.of\n$({ target: 'WeakMap', stat: true }, {\n  of: of\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar collectionAddAll = require('../internals/collection-add-all');\n\n// `WeakSet.prototype.addAll` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'WeakSet', proto: true, real: true, forced: IS_PURE }, {\n  addAll: function addAll(/* ...elements */) {\n    return collectionAddAll.apply(this, arguments);\n  }\n});\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar collectionDeleteAll = require('../internals/collection-delete-all');\n\n// `WeakSet.prototype.deleteAll` method\n// https://github.com/tc39/proposal-collection-methods\n$({ target: 'WeakSet', proto: true, real: true, forced: IS_PURE }, {\n  deleteAll: function deleteAll(/* ...elements */) {\n    return collectionDeleteAll.apply(this, arguments);\n  }\n});\n","var $ = require('../internals/export');\nvar from = require('../internals/collection-from');\n\n// `WeakSet.from` method\n// https://tc39.github.io/proposal-setmap-offrom/#sec-weakset.from\n$({ target: 'WeakSet', stat: true }, {\n  from: from\n});\n","var $ = require('../internals/export');\nvar of = require('../internals/collection-of');\n\n// `WeakSet.of` method\n// https://tc39.github.io/proposal-setmap-offrom/#sec-weakset.of\n$({ target: 'WeakSet', stat: true }, {\n  of: of\n});\n","var global = require('../internals/global');\nvar DOMIterables = require('../internals/dom-iterables');\nvar forEach = require('../internals/array-for-each');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\n\nfor (var COLLECTION_NAME in DOMIterables) {\n  var Collection = global[COLLECTION_NAME];\n  var CollectionPrototype = Collection && Collection.prototype;\n  // some Chrome versions have non-configurable methods on DOMTokenList\n  if (CollectionPrototype && CollectionPrototype.forEach !== forEach) try {\n    createNonEnumerableProperty(CollectionPrototype, 'forEach', forEach);\n  } catch (error) {\n    CollectionPrototype.forEach = forEach;\n  }\n}\n","var global = require('../internals/global');\nvar DOMIterables = require('../internals/dom-iterables');\nvar ArrayIteratorMethods = require('../modules/es.array.iterator');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar ITERATOR = wellKnownSymbol('iterator');\nvar TO_STRING_TAG = wellKnownSymbol('toStringTag');\nvar ArrayValues = ArrayIteratorMethods.values;\n\nfor (var COLLECTION_NAME in DOMIterables) {\n  var Collection = global[COLLECTION_NAME];\n  var CollectionPrototype = Collection && Collection.prototype;\n  if (CollectionPrototype) {\n    // some Chrome versions have non-configurable methods on DOMTokenList\n    if (CollectionPrototype[ITERATOR] !== ArrayValues) try {\n      createNonEnumerableProperty(CollectionPrototype, ITERATOR, ArrayValues);\n    } catch (error) {\n      CollectionPrototype[ITERATOR] = ArrayValues;\n    }\n    if (!CollectionPrototype[TO_STRING_TAG]) {\n      createNonEnumerableProperty(CollectionPrototype, TO_STRING_TAG, COLLECTION_NAME);\n    }\n    if (DOMIterables[COLLECTION_NAME]) for (var METHOD_NAME in ArrayIteratorMethods) {\n      // some Chrome versions have non-configurable methods on DOMTokenList\n      if (CollectionPrototype[METHOD_NAME] !== ArrayIteratorMethods[METHOD_NAME]) try {\n        createNonEnumerableProperty(CollectionPrototype, METHOD_NAME, ArrayIteratorMethods[METHOD_NAME]);\n      } catch (error) {\n        CollectionPrototype[METHOD_NAME] = ArrayIteratorMethods[METHOD_NAME];\n      }\n    }\n  }\n}\n","var $ = require('../internals/export');\nvar global = require('../internals/global');\nvar task = require('../internals/task');\n\nvar FORCED = !global.setImmediate || !global.clearImmediate;\n\n// http://w3c.github.io/setImmediate/\n$({ global: true, bind: true, enumerable: true, forced: FORCED }, {\n  // `setImmediate` method\n  // http://w3c.github.io/setImmediate/#si-setImmediate\n  setImmediate: task.set,\n  // `clearImmediate` method\n  // http://w3c.github.io/setImmediate/#si-clearImmediate\n  clearImmediate: task.clear\n});\n","var $ = require('../internals/export');\nvar global = require('../internals/global');\nvar microtask = require('../internals/microtask');\nvar classof = require('../internals/classof-raw');\n\nvar process = global.process;\nvar isNode = classof(process) == 'process';\n\n// `queueMicrotask` method\n// https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-queuemicrotask\n$({ global: true, enumerable: true, noTargetGet: true }, {\n  queueMicrotask: function queueMicrotask(fn) {\n    var domain = isNode && process.domain;\n    microtask(domain ? domain.bind(fn) : fn);\n  }\n});\n","'use strict';\n// TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`\nrequire('../modules/es.array.iterator');\nvar $ = require('../internals/export');\nvar getBuiltIn = require('../internals/get-built-in');\nvar USE_NATIVE_URL = require('../internals/native-url');\nvar redefine = require('../internals/redefine');\nvar redefineAll = require('../internals/redefine-all');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar createIteratorConstructor = require('../internals/create-iterator-constructor');\nvar InternalStateModule = require('../internals/internal-state');\nvar anInstance = require('../internals/an-instance');\nvar hasOwn = require('../internals/has');\nvar bind = require('../internals/function-bind-context');\nvar classof = require('../internals/classof');\nvar anObject = require('../internals/an-object');\nvar isObject = require('../internals/is-object');\nvar create = require('../internals/object-create');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\nvar getIterator = require('../internals/get-iterator');\nvar getIteratorMethod = require('../internals/get-iterator-method');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar $fetch = getBuiltIn('fetch');\nvar Headers = getBuiltIn('Headers');\nvar ITERATOR = wellKnownSymbol('iterator');\nvar URL_SEARCH_PARAMS = 'URLSearchParams';\nvar URL_SEARCH_PARAMS_ITERATOR = URL_SEARCH_PARAMS + 'Iterator';\nvar setInternalState = InternalStateModule.set;\nvar getInternalParamsState = InternalStateModule.getterFor(URL_SEARCH_PARAMS);\nvar getInternalIteratorState = InternalStateModule.getterFor(URL_SEARCH_PARAMS_ITERATOR);\n\nvar plus = /\\+/g;\nvar sequences = Array(4);\n\nvar percentSequence = function (bytes) {\n  return sequences[bytes - 1] || (sequences[bytes - 1] = RegExp('((?:%[\\\\da-f]{2}){' + bytes + '})', 'gi'));\n};\n\nvar percentDecode = function (sequence) {\n  try {\n    return decodeURIComponent(sequence);\n  } catch (error) {\n    return sequence;\n  }\n};\n\nvar deserialize = function (it) {\n  var result = it.replace(plus, ' ');\n  var bytes = 4;\n  try {\n    return decodeURIComponent(result);\n  } catch (error) {\n    while (bytes) {\n      result = result.replace(percentSequence(bytes--), percentDecode);\n    }\n    return result;\n  }\n};\n\nvar find = /[!'()~]|%20/g;\n\nvar replace = {\n  '!': '%21',\n  \"'\": '%27',\n  '(': '%28',\n  ')': '%29',\n  '~': '%7E',\n  '%20': '+'\n};\n\nvar replacer = function (match) {\n  return replace[match];\n};\n\nvar serialize = function (it) {\n  return encodeURIComponent(it).replace(find, replacer);\n};\n\nvar parseSearchParams = function (result, query) {\n  if (query) {\n    var attributes = query.split('&');\n    var index = 0;\n    var attribute, entry;\n    while (index < attributes.length) {\n      attribute = attributes[index++];\n      if (attribute.length) {\n        entry = attribute.split('=');\n        result.push({\n          key: deserialize(entry.shift()),\n          value: deserialize(entry.join('='))\n        });\n      }\n    }\n  }\n};\n\nvar updateSearchParams = function (query) {\n  this.entries.length = 0;\n  parseSearchParams(this.entries, query);\n};\n\nvar validateArgumentsLength = function (passed, required) {\n  if (passed < required) throw TypeError('Not enough arguments');\n};\n\nvar URLSearchParamsIterator = createIteratorConstructor(function Iterator(params, kind) {\n  setInternalState(this, {\n    type: URL_SEARCH_PARAMS_ITERATOR,\n    iterator: getIterator(getInternalParamsState(params).entries),\n    kind: kind\n  });\n}, 'Iterator', function next() {\n  var state = getInternalIteratorState(this);\n  var kind = state.kind;\n  var step = state.iterator.next();\n  var entry = step.value;\n  if (!step.done) {\n    step.value = kind === 'keys' ? entry.key : kind === 'values' ? entry.value : [entry.key, entry.value];\n  } return step;\n});\n\n// `URLSearchParams` constructor\n// https://url.spec.whatwg.org/#interface-urlsearchparams\nvar URLSearchParamsConstructor = function URLSearchParams(/* init */) {\n  anInstance(this, URLSearchParamsConstructor, URL_SEARCH_PARAMS);\n  var init = arguments.length > 0 ? arguments[0] : undefined;\n  var that = this;\n  var entries = [];\n  var iteratorMethod, iterator, next, step, entryIterator, entryNext, first, second, key;\n\n  setInternalState(that, {\n    type: URL_SEARCH_PARAMS,\n    entries: entries,\n    updateURL: function () { /* empty */ },\n    updateSearchParams: updateSearchParams\n  });\n\n  if (init !== undefined) {\n    if (isObject(init)) {\n      iteratorMethod = getIteratorMethod(init);\n      if (typeof iteratorMethod === 'function') {\n        iterator = iteratorMethod.call(init);\n        next = iterator.next;\n        while (!(step = next.call(iterator)).done) {\n          entryIterator = getIterator(anObject(step.value));\n          entryNext = entryIterator.next;\n          if (\n            (first = entryNext.call(entryIterator)).done ||\n            (second = entryNext.call(entryIterator)).done ||\n            !entryNext.call(entryIterator).done\n          ) throw TypeError('Expected sequence with length 2');\n          entries.push({ key: first.value + '', value: second.value + '' });\n        }\n      } else for (key in init) if (hasOwn(init, key)) entries.push({ key: key, value: init[key] + '' });\n    } else {\n      parseSearchParams(entries, typeof init === 'string' ? init.charAt(0) === '?' ? init.slice(1) : init : init + '');\n    }\n  }\n};\n\nvar URLSearchParamsPrototype = URLSearchParamsConstructor.prototype;\n\nredefineAll(URLSearchParamsPrototype, {\n  // `URLSearchParams.prototype.appent` method\n  // https://url.spec.whatwg.org/#dom-urlsearchparams-append\n  append: function append(name, value) {\n    validateArgumentsLength(arguments.length, 2);\n    var state = getInternalParamsState(this);\n    state.entries.push({ key: name + '', value: value + '' });\n    state.updateURL();\n  },\n  // `URLSearchParams.prototype.delete` method\n  // https://url.spec.whatwg.org/#dom-urlsearchparams-delete\n  'delete': function (name) {\n    validateArgumentsLength(arguments.length, 1);\n    var state = getInternalParamsState(this);\n    var entries = state.entries;\n    var key = name + '';\n    var index = 0;\n    while (index < entries.length) {\n      if (entries[index].key === key) entries.splice(index, 1);\n      else index++;\n    }\n    state.updateURL();\n  },\n  // `URLSearchParams.prototype.get` method\n  // https://url.spec.whatwg.org/#dom-urlsearchparams-get\n  get: function get(name) {\n    validateArgumentsLength(arguments.length, 1);\n    var entries = getInternalParamsState(this).entries;\n    var key = name + '';\n    var index = 0;\n    for (; index < entries.length; index++) {\n      if (entries[index].key === key) return entries[index].value;\n    }\n    return null;\n  },\n  // `URLSearchParams.prototype.getAll` method\n  // https://url.spec.whatwg.org/#dom-urlsearchparams-getall\n  getAll: function getAll(name) {\n    validateArgumentsLength(arguments.length, 1);\n    var entries = getInternalParamsState(this).entries;\n    var key = name + '';\n    var result = [];\n    var index = 0;\n    for (; index < entries.length; index++) {\n      if (entries[index].key === key) result.push(entries[index].value);\n    }\n    return result;\n  },\n  // `URLSearchParams.prototype.has` method\n  // https://url.spec.whatwg.org/#dom-urlsearchparams-has\n  has: function has(name) {\n    validateArgumentsLength(arguments.length, 1);\n    var entries = getInternalParamsState(this).entries;\n    var key = name + '';\n    var index = 0;\n    while (index < entries.length) {\n      if (entries[index++].key === key) return true;\n    }\n    return false;\n  },\n  // `URLSearchParams.prototype.set` method\n  // https://url.spec.whatwg.org/#dom-urlsearchparams-set\n  set: function set(name, value) {\n    validateArgumentsLength(arguments.length, 1);\n    var state = getInternalParamsState(this);\n    var entries = state.entries;\n    var found = false;\n    var key = name + '';\n    var val = value + '';\n    var index = 0;\n    var entry;\n    for (; index < entries.length; index++) {\n      entry = entries[index];\n      if (entry.key === key) {\n        if (found) entries.splice(index--, 1);\n        else {\n          found = true;\n          entry.value = val;\n        }\n      }\n    }\n    if (!found) entries.push({ key: key, value: val });\n    state.updateURL();\n  },\n  // `URLSearchParams.prototype.sort` method\n  // https://url.spec.whatwg.org/#dom-urlsearchparams-sort\n  sort: function sort() {\n    var state = getInternalParamsState(this);\n    var entries = state.entries;\n    // Array#sort is not stable in some engines\n    var slice = entries.slice();\n    var entry, entriesIndex, sliceIndex;\n    entries.length = 0;\n    for (sliceIndex = 0; sliceIndex < slice.length; sliceIndex++) {\n      entry = slice[sliceIndex];\n      for (entriesIndex = 0; entriesIndex < sliceIndex; entriesIndex++) {\n        if (entries[entriesIndex].key > entry.key) {\n          entries.splice(entriesIndex, 0, entry);\n          break;\n        }\n      }\n      if (entriesIndex === sliceIndex) entries.push(entry);\n    }\n    state.updateURL();\n  },\n  // `URLSearchParams.prototype.forEach` method\n  forEach: function forEach(callback /* , thisArg */) {\n    var entries = getInternalParamsState(this).entries;\n    var boundFunction = bind(callback, arguments.length > 1 ? arguments[1] : undefined, 3);\n    var index = 0;\n    var entry;\n    while (index < entries.length) {\n      entry = entries[index++];\n      boundFunction(entry.value, entry.key, this);\n    }\n  },\n  // `URLSearchParams.prototype.keys` method\n  keys: function keys() {\n    return new URLSearchParamsIterator(this, 'keys');\n  },\n  // `URLSearchParams.prototype.values` method\n  values: function values() {\n    return new URLSearchParamsIterator(this, 'values');\n  },\n  // `URLSearchParams.prototype.entries` method\n  entries: function entries() {\n    return new URLSearchParamsIterator(this, 'entries');\n  }\n}, { enumerable: true });\n\n// `URLSearchParams.prototype[@@iterator]` method\nredefine(URLSearchParamsPrototype, ITERATOR, URLSearchParamsPrototype.entries);\n\n// `URLSearchParams.prototype.toString` method\n// https://url.spec.whatwg.org/#urlsearchparams-stringification-behavior\nredefine(URLSearchParamsPrototype, 'toString', function toString() {\n  var entries = getInternalParamsState(this).entries;\n  var result = [];\n  var index = 0;\n  var entry;\n  while (index < entries.length) {\n    entry = entries[index++];\n    result.push(serialize(entry.key) + '=' + serialize(entry.value));\n  } return result.join('&');\n}, { enumerable: true });\n\nsetToStringTag(URLSearchParamsConstructor, URL_SEARCH_PARAMS);\n\n$({ global: true, forced: !USE_NATIVE_URL }, {\n  URLSearchParams: URLSearchParamsConstructor\n});\n\n// Wrap `fetch` for correct work with polyfilled `URLSearchParams`\n// https://github.com/zloirock/core-js/issues/674\nif (!USE_NATIVE_URL && typeof $fetch == 'function' && typeof Headers == 'function') {\n  $({ global: true, enumerable: true, forced: true }, {\n    fetch: function fetch(input /* , init */) {\n      var args = [input];\n      var init, body, headers;\n      if (arguments.length > 1) {\n        init = arguments[1];\n        if (isObject(init)) {\n          body = init.body;\n          if (classof(body) === URL_SEARCH_PARAMS) {\n            headers = init.headers ? new Headers(init.headers) : new Headers();\n            if (!headers.has('content-type')) {\n              headers.set('content-type', 'application/x-www-form-urlencoded;charset=UTF-8');\n            }\n            init = create(init, {\n              body: createPropertyDescriptor(0, String(body)),\n              headers: createPropertyDescriptor(0, headers)\n            });\n          }\n        }\n        args.push(init);\n      } return $fetch.apply(this, args);\n    }\n  });\n}\n\nmodule.exports = {\n  URLSearchParams: URLSearchParamsConstructor,\n  getState: getInternalParamsState\n};\n","'use strict';\n// TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`\nrequire('../modules/es.string.iterator');\nvar $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar USE_NATIVE_URL = require('../internals/native-url');\nvar global = require('../internals/global');\nvar defineProperties = require('../internals/object-define-properties');\nvar redefine = require('../internals/redefine');\nvar anInstance = require('../internals/an-instance');\nvar has = require('../internals/has');\nvar assign = require('../internals/object-assign');\nvar arrayFrom = require('../internals/array-from');\nvar codeAt = require('../internals/string-multibyte').codeAt;\nvar toASCII = require('../internals/string-punycode-to-ascii');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar URLSearchParamsModule = require('../modules/web.url-search-params');\nvar InternalStateModule = require('../internals/internal-state');\n\nvar NativeURL = global.URL;\nvar URLSearchParams = URLSearchParamsModule.URLSearchParams;\nvar getInternalSearchParamsState = URLSearchParamsModule.getState;\nvar setInternalState = InternalStateModule.set;\nvar getInternalURLState = InternalStateModule.getterFor('URL');\nvar floor = Math.floor;\nvar pow = Math.pow;\n\nvar INVALID_AUTHORITY = 'Invalid authority';\nvar INVALID_SCHEME = 'Invalid scheme';\nvar INVALID_HOST = 'Invalid host';\nvar INVALID_PORT = 'Invalid port';\n\nvar ALPHA = /[A-Za-z]/;\nvar ALPHANUMERIC = /[\\d+-.A-Za-z]/;\nvar DIGIT = /\\d/;\nvar HEX_START = /^(0x|0X)/;\nvar OCT = /^[0-7]+$/;\nvar DEC = /^\\d+$/;\nvar HEX = /^[\\dA-Fa-f]+$/;\n// eslint-disable-next-line no-control-regex\nvar FORBIDDEN_HOST_CODE_POINT = /[\\u0000\\u0009\\u000A\\u000D #%/:?@[\\\\]]/;\n// eslint-disable-next-line no-control-regex\nvar FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT = /[\\u0000\\u0009\\u000A\\u000D #/:?@[\\\\]]/;\n// eslint-disable-next-line no-control-regex\nvar LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE = /^[\\u0000-\\u001F ]+|[\\u0000-\\u001F ]+$/g;\n// eslint-disable-next-line no-control-regex\nvar TAB_AND_NEW_LINE = /[\\u0009\\u000A\\u000D]/g;\nvar EOF;\n\nvar parseHost = function (url, input) {\n  var result, codePoints, index;\n  if (input.charAt(0) == '[') {\n    if (input.charAt(input.length - 1) != ']') return INVALID_HOST;\n    result = parseIPv6(input.slice(1, -1));\n    if (!result) return INVALID_HOST;\n    url.host = result;\n  // opaque host\n  } else if (!isSpecial(url)) {\n    if (FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT.test(input)) return INVALID_HOST;\n    result = '';\n    codePoints = arrayFrom(input);\n    for (index = 0; index < codePoints.length; index++) {\n      result += percentEncode(codePoints[index], C0ControlPercentEncodeSet);\n    }\n    url.host = result;\n  } else {\n    input = toASCII(input);\n    if (FORBIDDEN_HOST_CODE_POINT.test(input)) return INVALID_HOST;\n    result = parseIPv4(input);\n    if (result === null) return INVALID_HOST;\n    url.host = result;\n  }\n};\n\nvar parseIPv4 = function (input) {\n  var parts = input.split('.');\n  var partsLength, numbers, index, part, radix, number, ipv4;\n  if (parts.length && parts[parts.length - 1] == '') {\n    parts.pop();\n  }\n  partsLength = parts.length;\n  if (partsLength > 4) return input;\n  numbers = [];\n  for (index = 0; index < partsLength; index++) {\n    part = parts[index];\n    if (part == '') return input;\n    radix = 10;\n    if (part.length > 1 && part.charAt(0) == '0') {\n      radix = HEX_START.test(part) ? 16 : 8;\n      part = part.slice(radix == 8 ? 1 : 2);\n    }\n    if (part === '') {\n      number = 0;\n    } else {\n      if (!(radix == 10 ? DEC : radix == 8 ? OCT : HEX).test(part)) return input;\n      number = parseInt(part, radix);\n    }\n    numbers.push(number);\n  }\n  for (index = 0; index < partsLength; index++) {\n    number = numbers[index];\n    if (index == partsLength - 1) {\n      if (number >= pow(256, 5 - partsLength)) return null;\n    } else if (number > 255) return null;\n  }\n  ipv4 = numbers.pop();\n  for (index = 0; index < numbers.length; index++) {\n    ipv4 += numbers[index] * pow(256, 3 - index);\n  }\n  return ipv4;\n};\n\n// eslint-disable-next-line max-statements\nvar parseIPv6 = function (input) {\n  var address = [0, 0, 0, 0, 0, 0, 0, 0];\n  var pieceIndex = 0;\n  var compress = null;\n  var pointer = 0;\n  var value, length, numbersSeen, ipv4Piece, number, swaps, swap;\n\n  var char = function () {\n    return input.charAt(pointer);\n  };\n\n  if (char() == ':') {\n    if (input.charAt(1) != ':') return;\n    pointer += 2;\n    pieceIndex++;\n    compress = pieceIndex;\n  }\n  while (char()) {\n    if (pieceIndex == 8) return;\n    if (char() == ':') {\n      if (compress !== null) return;\n      pointer++;\n      pieceIndex++;\n      compress = pieceIndex;\n      continue;\n    }\n    value = length = 0;\n    while (length < 4 && HEX.test(char())) {\n      value = value * 16 + parseInt(char(), 16);\n      pointer++;\n      length++;\n    }\n    if (char() == '.') {\n      if (length == 0) return;\n      pointer -= length;\n      if (pieceIndex > 6) return;\n      numbersSeen = 0;\n      while (char()) {\n        ipv4Piece = null;\n        if (numbersSeen > 0) {\n          if (char() == '.' && numbersSeen < 4) pointer++;\n          else return;\n        }\n        if (!DIGIT.test(char())) return;\n        while (DIGIT.test(char())) {\n          number = parseInt(char(), 10);\n          if (ipv4Piece === null) ipv4Piece = number;\n          else if (ipv4Piece == 0) return;\n          else ipv4Piece = ipv4Piece * 10 + number;\n          if (ipv4Piece > 255) return;\n          pointer++;\n        }\n        address[pieceIndex] = address[pieceIndex] * 256 + ipv4Piece;\n        numbersSeen++;\n        if (numbersSeen == 2 || numbersSeen == 4) pieceIndex++;\n      }\n      if (numbersSeen != 4) return;\n      break;\n    } else if (char() == ':') {\n      pointer++;\n      if (!char()) return;\n    } else if (char()) return;\n    address[pieceIndex++] = value;\n  }\n  if (compress !== null) {\n    swaps = pieceIndex - compress;\n    pieceIndex = 7;\n    while (pieceIndex != 0 && swaps > 0) {\n      swap = address[pieceIndex];\n      address[pieceIndex--] = address[compress + swaps - 1];\n      address[compress + --swaps] = swap;\n    }\n  } else if (pieceIndex != 8) return;\n  return address;\n};\n\nvar findLongestZeroSequence = function (ipv6) {\n  var maxIndex = null;\n  var maxLength = 1;\n  var currStart = null;\n  var currLength = 0;\n  var index = 0;\n  for (; index < 8; index++) {\n    if (ipv6[index] !== 0) {\n      if (currLength > maxLength) {\n        maxIndex = currStart;\n        maxLength = currLength;\n      }\n      currStart = null;\n      currLength = 0;\n    } else {\n      if (currStart === null) currStart = index;\n      ++currLength;\n    }\n  }\n  if (currLength > maxLength) {\n    maxIndex = currStart;\n    maxLength = currLength;\n  }\n  return maxIndex;\n};\n\nvar serializeHost = function (host) {\n  var result, index, compress, ignore0;\n  // ipv4\n  if (typeof host == 'number') {\n    result = [];\n    for (index = 0; index < 4; index++) {\n      result.unshift(host % 256);\n      host = floor(host / 256);\n    } return result.join('.');\n  // ipv6\n  } else if (typeof host == 'object') {\n    result = '';\n    compress = findLongestZeroSequence(host);\n    for (index = 0; index < 8; index++) {\n      if (ignore0 && host[index] === 0) continue;\n      if (ignore0) ignore0 = false;\n      if (compress === index) {\n        result += index ? ':' : '::';\n        ignore0 = true;\n      } else {\n        result += host[index].toString(16);\n        if (index < 7) result += ':';\n      }\n    }\n    return '[' + result + ']';\n  } return host;\n};\n\nvar C0ControlPercentEncodeSet = {};\nvar fragmentPercentEncodeSet = assign({}, C0ControlPercentEncodeSet, {\n  ' ': 1, '\"': 1, '<': 1, '>': 1, '`': 1\n});\nvar pathPercentEncodeSet = assign({}, fragmentPercentEncodeSet, {\n  '#': 1, '?': 1, '{': 1, '}': 1\n});\nvar userinfoPercentEncodeSet = assign({}, pathPercentEncodeSet, {\n  '/': 1, ':': 1, ';': 1, '=': 1, '@': 1, '[': 1, '\\\\': 1, ']': 1, '^': 1, '|': 1\n});\n\nvar percentEncode = function (char, set) {\n  var code = codeAt(char, 0);\n  return code > 0x20 && code < 0x7F && !has(set, char) ? char : encodeURIComponent(char);\n};\n\nvar specialSchemes = {\n  ftp: 21,\n  file: null,\n  http: 80,\n  https: 443,\n  ws: 80,\n  wss: 443\n};\n\nvar isSpecial = function (url) {\n  return has(specialSchemes, url.scheme);\n};\n\nvar includesCredentials = function (url) {\n  return url.username != '' || url.password != '';\n};\n\nvar cannotHaveUsernamePasswordPort = function (url) {\n  return !url.host || url.cannotBeABaseURL || url.scheme == 'file';\n};\n\nvar isWindowsDriveLetter = function (string, normalized) {\n  var second;\n  return string.length == 2 && ALPHA.test(string.charAt(0))\n    && ((second = string.charAt(1)) == ':' || (!normalized && second == '|'));\n};\n\nvar startsWithWindowsDriveLetter = function (string) {\n  var third;\n  return string.length > 1 && isWindowsDriveLetter(string.slice(0, 2)) && (\n    string.length == 2 ||\n    ((third = string.charAt(2)) === '/' || third === '\\\\' || third === '?' || third === '#')\n  );\n};\n\nvar shortenURLsPath = function (url) {\n  var path = url.path;\n  var pathSize = path.length;\n  if (pathSize && (url.scheme != 'file' || pathSize != 1 || !isWindowsDriveLetter(path[0], true))) {\n    path.pop();\n  }\n};\n\nvar isSingleDot = function (segment) {\n  return segment === '.' || segment.toLowerCase() === '%2e';\n};\n\nvar isDoubleDot = function (segment) {\n  segment = segment.toLowerCase();\n  return segment === '..' || segment === '%2e.' || segment === '.%2e' || segment === '%2e%2e';\n};\n\n// States:\nvar SCHEME_START = {};\nvar SCHEME = {};\nvar NO_SCHEME = {};\nvar SPECIAL_RELATIVE_OR_AUTHORITY = {};\nvar PATH_OR_AUTHORITY = {};\nvar RELATIVE = {};\nvar RELATIVE_SLASH = {};\nvar SPECIAL_AUTHORITY_SLASHES = {};\nvar SPECIAL_AUTHORITY_IGNORE_SLASHES = {};\nvar AUTHORITY = {};\nvar HOST = {};\nvar HOSTNAME = {};\nvar PORT = {};\nvar FILE = {};\nvar FILE_SLASH = {};\nvar FILE_HOST = {};\nvar PATH_START = {};\nvar PATH = {};\nvar CANNOT_BE_A_BASE_URL_PATH = {};\nvar QUERY = {};\nvar FRAGMENT = {};\n\n// eslint-disable-next-line max-statements\nvar parseURL = function (url, input, stateOverride, base) {\n  var state = stateOverride || SCHEME_START;\n  var pointer = 0;\n  var buffer = '';\n  var seenAt = false;\n  var seenBracket = false;\n  var seenPasswordToken = false;\n  var codePoints, char, bufferCodePoints, failure;\n\n  if (!stateOverride) {\n    url.scheme = '';\n    url.username = '';\n    url.password = '';\n    url.host = null;\n    url.port = null;\n    url.path = [];\n    url.query = null;\n    url.fragment = null;\n    url.cannotBeABaseURL = false;\n    input = input.replace(LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE, '');\n  }\n\n  input = input.replace(TAB_AND_NEW_LINE, '');\n\n  codePoints = arrayFrom(input);\n\n  while (pointer <= codePoints.length) {\n    char = codePoints[pointer];\n    switch (state) {\n      case SCHEME_START:\n        if (char && ALPHA.test(char)) {\n          buffer += char.toLowerCase();\n          state = SCHEME;\n        } else if (!stateOverride) {\n          state = NO_SCHEME;\n          continue;\n        } else return INVALID_SCHEME;\n        break;\n\n      case SCHEME:\n        if (char && (ALPHANUMERIC.test(char) || char == '+' || char == '-' || char == '.')) {\n          buffer += char.toLowerCase();\n        } else if (char == ':') {\n          if (stateOverride && (\n            (isSpecial(url) != has(specialSchemes, buffer)) ||\n            (buffer == 'file' && (includesCredentials(url) || url.port !== null)) ||\n            (url.scheme == 'file' && !url.host)\n          )) return;\n          url.scheme = buffer;\n          if (stateOverride) {\n            if (isSpecial(url) && specialSchemes[url.scheme] == url.port) url.port = null;\n            return;\n          }\n          buffer = '';\n          if (url.scheme == 'file') {\n            state = FILE;\n          } else if (isSpecial(url) && base && base.scheme == url.scheme) {\n            state = SPECIAL_RELATIVE_OR_AUTHORITY;\n          } else if (isSpecial(url)) {\n            state = SPECIAL_AUTHORITY_SLASHES;\n          } else if (codePoints[pointer + 1] == '/') {\n            state = PATH_OR_AUTHORITY;\n            pointer++;\n          } else {\n            url.cannotBeABaseURL = true;\n            url.path.push('');\n            state = CANNOT_BE_A_BASE_URL_PATH;\n          }\n        } else if (!stateOverride) {\n          buffer = '';\n          state = NO_SCHEME;\n          pointer = 0;\n          continue;\n        } else return INVALID_SCHEME;\n        break;\n\n      case NO_SCHEME:\n        if (!base || (base.cannotBeABaseURL && char != '#')) return INVALID_SCHEME;\n        if (base.cannotBeABaseURL && char == '#') {\n          url.scheme = base.scheme;\n          url.path = base.path.slice();\n          url.query = base.query;\n          url.fragment = '';\n          url.cannotBeABaseURL = true;\n          state = FRAGMENT;\n          break;\n        }\n        state = base.scheme == 'file' ? FILE : RELATIVE;\n        continue;\n\n      case SPECIAL_RELATIVE_OR_AUTHORITY:\n        if (char == '/' && codePoints[pointer + 1] == '/') {\n          state = SPECIAL_AUTHORITY_IGNORE_SLASHES;\n          pointer++;\n        } else {\n          state = RELATIVE;\n          continue;\n        } break;\n\n      case PATH_OR_AUTHORITY:\n        if (char == '/') {\n          state = AUTHORITY;\n          break;\n        } else {\n          state = PATH;\n          continue;\n        }\n\n      case RELATIVE:\n        url.scheme = base.scheme;\n        if (char == EOF) {\n          url.username = base.username;\n          url.password = base.password;\n          url.host = base.host;\n          url.port = base.port;\n          url.path = base.path.slice();\n          url.query = base.query;\n        } else if (char == '/' || (char == '\\\\' && isSpecial(url))) {\n          state = RELATIVE_SLASH;\n        } else if (char == '?') {\n          url.username = base.username;\n          url.password = base.password;\n          url.host = base.host;\n          url.port = base.port;\n          url.path = base.path.slice();\n          url.query = '';\n          state = QUERY;\n        } else if (char == '#') {\n          url.username = base.username;\n          url.password = base.password;\n          url.host = base.host;\n          url.port = base.port;\n          url.path = base.path.slice();\n          url.query = base.query;\n          url.fragment = '';\n          state = FRAGMENT;\n        } else {\n          url.username = base.username;\n          url.password = base.password;\n          url.host = base.host;\n          url.port = base.port;\n          url.path = base.path.slice();\n          url.path.pop();\n          state = PATH;\n          continue;\n        } break;\n\n      case RELATIVE_SLASH:\n        if (isSpecial(url) && (char == '/' || char == '\\\\')) {\n          state = SPECIAL_AUTHORITY_IGNORE_SLASHES;\n        } else if (char == '/') {\n          state = AUTHORITY;\n        } else {\n          url.username = base.username;\n          url.password = base.password;\n          url.host = base.host;\n          url.port = base.port;\n          state = PATH;\n          continue;\n        } break;\n\n      case SPECIAL_AUTHORITY_SLASHES:\n        state = SPECIAL_AUTHORITY_IGNORE_SLASHES;\n        if (char != '/' || buffer.charAt(pointer + 1) != '/') continue;\n        pointer++;\n        break;\n\n      case SPECIAL_AUTHORITY_IGNORE_SLASHES:\n        if (char != '/' && char != '\\\\') {\n          state = AUTHORITY;\n          continue;\n        } break;\n\n      case AUTHORITY:\n        if (char == '@') {\n          if (seenAt) buffer = '%40' + buffer;\n          seenAt = true;\n          bufferCodePoints = arrayFrom(buffer);\n          for (var i = 0; i < bufferCodePoints.length; i++) {\n            var codePoint = bufferCodePoints[i];\n            if (codePoint == ':' && !seenPasswordToken) {\n              seenPasswordToken = true;\n              continue;\n            }\n            var encodedCodePoints = percentEncode(codePoint, userinfoPercentEncodeSet);\n            if (seenPasswordToken) url.password += encodedCodePoints;\n            else url.username += encodedCodePoints;\n          }\n          buffer = '';\n        } else if (\n          char == EOF || char == '/' || char == '?' || char == '#' ||\n          (char == '\\\\' && isSpecial(url))\n        ) {\n          if (seenAt && buffer == '') return INVALID_AUTHORITY;\n          pointer -= arrayFrom(buffer).length + 1;\n          buffer = '';\n          state = HOST;\n        } else buffer += char;\n        break;\n\n      case HOST:\n      case HOSTNAME:\n        if (stateOverride && url.scheme == 'file') {\n          state = FILE_HOST;\n          continue;\n        } else if (char == ':' && !seenBracket) {\n          if (buffer == '') return INVALID_HOST;\n          failure = parseHost(url, buffer);\n          if (failure) return failure;\n          buffer = '';\n          state = PORT;\n          if (stateOverride == HOSTNAME) return;\n        } else if (\n          char == EOF || char == '/' || char == '?' || char == '#' ||\n          (char == '\\\\' && isSpecial(url))\n        ) {\n          if (isSpecial(url) && buffer == '') return INVALID_HOST;\n          if (stateOverride && buffer == '' && (includesCredentials(url) || url.port !== null)) return;\n          failure = parseHost(url, buffer);\n          if (failure) return failure;\n          buffer = '';\n          state = PATH_START;\n          if (stateOverride) return;\n          continue;\n        } else {\n          if (char == '[') seenBracket = true;\n          else if (char == ']') seenBracket = false;\n          buffer += char;\n        } break;\n\n      case PORT:\n        if (DIGIT.test(char)) {\n          buffer += char;\n        } else if (\n          char == EOF || char == '/' || char == '?' || char == '#' ||\n          (char == '\\\\' && isSpecial(url)) ||\n          stateOverride\n        ) {\n          if (buffer != '') {\n            var port = parseInt(buffer, 10);\n            if (port > 0xFFFF) return INVALID_PORT;\n            url.port = (isSpecial(url) && port === specialSchemes[url.scheme]) ? null : port;\n            buffer = '';\n          }\n          if (stateOverride) return;\n          state = PATH_START;\n          continue;\n        } else return INVALID_PORT;\n        break;\n\n      case FILE:\n        url.scheme = 'file';\n        if (char == '/' || char == '\\\\') state = FILE_SLASH;\n        else if (base && base.scheme == 'file') {\n          if (char == EOF) {\n            url.host = base.host;\n            url.path = base.path.slice();\n            url.query = base.query;\n          } else if (char == '?') {\n            url.host = base.host;\n            url.path = base.path.slice();\n            url.query = '';\n            state = QUERY;\n          } else if (char == '#') {\n            url.host = base.host;\n            url.path = base.path.slice();\n            url.query = base.query;\n            url.fragment = '';\n            state = FRAGMENT;\n          } else {\n            if (!startsWithWindowsDriveLetter(codePoints.slice(pointer).join(''))) {\n              url.host = base.host;\n              url.path = base.path.slice();\n              shortenURLsPath(url);\n            }\n            state = PATH;\n            continue;\n          }\n        } else {\n          state = PATH;\n          continue;\n        } break;\n\n      case FILE_SLASH:\n        if (char == '/' || char == '\\\\') {\n          state = FILE_HOST;\n          break;\n        }\n        if (base && base.scheme == 'file' && !startsWithWindowsDriveLetter(codePoints.slice(pointer).join(''))) {\n          if (isWindowsDriveLetter(base.path[0], true)) url.path.push(base.path[0]);\n          else url.host = base.host;\n        }\n        state = PATH;\n        continue;\n\n      case FILE_HOST:\n        if (char == EOF || char == '/' || char == '\\\\' || char == '?' || char == '#') {\n          if (!stateOverride && isWindowsDriveLetter(buffer)) {\n            state = PATH;\n          } else if (buffer == '') {\n            url.host = '';\n            if (stateOverride) return;\n            state = PATH_START;\n          } else {\n            failure = parseHost(url, buffer);\n            if (failure) return failure;\n            if (url.host == 'localhost') url.host = '';\n            if (stateOverride) return;\n            buffer = '';\n            state = PATH_START;\n          } continue;\n        } else buffer += char;\n        break;\n\n      case PATH_START:\n        if (isSpecial(url)) {\n          state = PATH;\n          if (char != '/' && char != '\\\\') continue;\n        } else if (!stateOverride && char == '?') {\n          url.query = '';\n          state = QUERY;\n        } else if (!stateOverride && char == '#') {\n          url.fragment = '';\n          state = FRAGMENT;\n        } else if (char != EOF) {\n          state = PATH;\n          if (char != '/') continue;\n        } break;\n\n      case PATH:\n        if (\n          char == EOF || char == '/' ||\n          (char == '\\\\' && isSpecial(url)) ||\n          (!stateOverride && (char == '?' || char == '#'))\n        ) {\n          if (isDoubleDot(buffer)) {\n            shortenURLsPath(url);\n            if (char != '/' && !(char == '\\\\' && isSpecial(url))) {\n              url.path.push('');\n            }\n          } else if (isSingleDot(buffer)) {\n            if (char != '/' && !(char == '\\\\' && isSpecial(url))) {\n              url.path.push('');\n            }\n          } else {\n            if (url.scheme == 'file' && !url.path.length && isWindowsDriveLetter(buffer)) {\n              if (url.host) url.host = '';\n              buffer = buffer.charAt(0) + ':'; // normalize windows drive letter\n            }\n            url.path.push(buffer);\n          }\n          buffer = '';\n          if (url.scheme == 'file' && (char == EOF || char == '?' || char == '#')) {\n            while (url.path.length > 1 && url.path[0] === '') {\n              url.path.shift();\n            }\n          }\n          if (char == '?') {\n            url.query = '';\n            state = QUERY;\n          } else if (char == '#') {\n            url.fragment = '';\n            state = FRAGMENT;\n          }\n        } else {\n          buffer += percentEncode(char, pathPercentEncodeSet);\n        } break;\n\n      case CANNOT_BE_A_BASE_URL_PATH:\n        if (char == '?') {\n          url.query = '';\n          state = QUERY;\n        } else if (char == '#') {\n          url.fragment = '';\n          state = FRAGMENT;\n        } else if (char != EOF) {\n          url.path[0] += percentEncode(char, C0ControlPercentEncodeSet);\n        } break;\n\n      case QUERY:\n        if (!stateOverride && char == '#') {\n          url.fragment = '';\n          state = FRAGMENT;\n        } else if (char != EOF) {\n          if (char == \"'\" && isSpecial(url)) url.query += '%27';\n          else if (char == '#') url.query += '%23';\n          else url.query += percentEncode(char, C0ControlPercentEncodeSet);\n        } break;\n\n      case FRAGMENT:\n        if (char != EOF) url.fragment += percentEncode(char, fragmentPercentEncodeSet);\n        break;\n    }\n\n    pointer++;\n  }\n};\n\n// `URL` constructor\n// https://url.spec.whatwg.org/#url-class\nvar URLConstructor = function URL(url /* , base */) {\n  var that = anInstance(this, URLConstructor, 'URL');\n  var base = arguments.length > 1 ? arguments[1] : undefined;\n  var urlString = String(url);\n  var state = setInternalState(that, { type: 'URL' });\n  var baseState, failure;\n  if (base !== undefined) {\n    if (base instanceof URLConstructor) baseState = getInternalURLState(base);\n    else {\n      failure = parseURL(baseState = {}, String(base));\n      if (failure) throw TypeError(failure);\n    }\n  }\n  failure = parseURL(state, urlString, null, baseState);\n  if (failure) throw TypeError(failure);\n  var searchParams = state.searchParams = new URLSearchParams();\n  var searchParamsState = getInternalSearchParamsState(searchParams);\n  searchParamsState.updateSearchParams(state.query);\n  searchParamsState.updateURL = function () {\n    state.query = String(searchParams) || null;\n  };\n  if (!DESCRIPTORS) {\n    that.href = serializeURL.call(that);\n    that.origin = getOrigin.call(that);\n    that.protocol = getProtocol.call(that);\n    that.username = getUsername.call(that);\n    that.password = getPassword.call(that);\n    that.host = getHost.call(that);\n    that.hostname = getHostname.call(that);\n    that.port = getPort.call(that);\n    that.pathname = getPathname.call(that);\n    that.search = getSearch.call(that);\n    that.searchParams = getSearchParams.call(that);\n    that.hash = getHash.call(that);\n  }\n};\n\nvar URLPrototype = URLConstructor.prototype;\n\nvar serializeURL = function () {\n  var url = getInternalURLState(this);\n  var scheme = url.scheme;\n  var username = url.username;\n  var password = url.password;\n  var host = url.host;\n  var port = url.port;\n  var path = url.path;\n  var query = url.query;\n  var fragment = url.fragment;\n  var output = scheme + ':';\n  if (host !== null) {\n    output += '//';\n    if (includesCredentials(url)) {\n      output += username + (password ? ':' + password : '') + '@';\n    }\n    output += serializeHost(host);\n    if (port !== null) output += ':' + port;\n  } else if (scheme == 'file') output += '//';\n  output += url.cannotBeABaseURL ? path[0] : path.length ? '/' + path.join('/') : '';\n  if (query !== null) output += '?' + query;\n  if (fragment !== null) output += '#' + fragment;\n  return output;\n};\n\nvar getOrigin = function () {\n  var url = getInternalURLState(this);\n  var scheme = url.scheme;\n  var port = url.port;\n  if (scheme == 'blob') try {\n    return new URL(scheme.path[0]).origin;\n  } catch (error) {\n    return 'null';\n  }\n  if (scheme == 'file' || !isSpecial(url)) return 'null';\n  return scheme + '://' + serializeHost(url.host) + (port !== null ? ':' + port : '');\n};\n\nvar getProtocol = function () {\n  return getInternalURLState(this).scheme + ':';\n};\n\nvar getUsername = function () {\n  return getInternalURLState(this).username;\n};\n\nvar getPassword = function () {\n  return getInternalURLState(this).password;\n};\n\nvar getHost = function () {\n  var url = getInternalURLState(this);\n  var host = url.host;\n  var port = url.port;\n  return host === null ? ''\n    : port === null ? serializeHost(host)\n    : serializeHost(host) + ':' + port;\n};\n\nvar getHostname = function () {\n  var host = getInternalURLState(this).host;\n  return host === null ? '' : serializeHost(host);\n};\n\nvar getPort = function () {\n  var port = getInternalURLState(this).port;\n  return port === null ? '' : String(port);\n};\n\nvar getPathname = function () {\n  var url = getInternalURLState(this);\n  var path = url.path;\n  return url.cannotBeABaseURL ? path[0] : path.length ? '/' + path.join('/') : '';\n};\n\nvar getSearch = function () {\n  var query = getInternalURLState(this).query;\n  return query ? '?' + query : '';\n};\n\nvar getSearchParams = function () {\n  return getInternalURLState(this).searchParams;\n};\n\nvar getHash = function () {\n  var fragment = getInternalURLState(this).fragment;\n  return fragment ? '#' + fragment : '';\n};\n\nvar accessorDescriptor = function (getter, setter) {\n  return { get: getter, set: setter, configurable: true, enumerable: true };\n};\n\nif (DESCRIPTORS) {\n  defineProperties(URLPrototype, {\n    // `URL.prototype.href` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-href\n    href: accessorDescriptor(serializeURL, function (href) {\n      var url = getInternalURLState(this);\n      var urlString = String(href);\n      var failure = parseURL(url, urlString);\n      if (failure) throw TypeError(failure);\n      getInternalSearchParamsState(url.searchParams).updateSearchParams(url.query);\n    }),\n    // `URL.prototype.origin` getter\n    // https://url.spec.whatwg.org/#dom-url-origin\n    origin: accessorDescriptor(getOrigin),\n    // `URL.prototype.protocol` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-protocol\n    protocol: accessorDescriptor(getProtocol, function (protocol) {\n      var url = getInternalURLState(this);\n      parseURL(url, String(protocol) + ':', SCHEME_START);\n    }),\n    // `URL.prototype.username` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-username\n    username: accessorDescriptor(getUsername, function (username) {\n      var url = getInternalURLState(this);\n      var codePoints = arrayFrom(String(username));\n      if (cannotHaveUsernamePasswordPort(url)) return;\n      url.username = '';\n      for (var i = 0; i < codePoints.length; i++) {\n        url.username += percentEncode(codePoints[i], userinfoPercentEncodeSet);\n      }\n    }),\n    // `URL.prototype.password` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-password\n    password: accessorDescriptor(getPassword, function (password) {\n      var url = getInternalURLState(this);\n      var codePoints = arrayFrom(String(password));\n      if (cannotHaveUsernamePasswordPort(url)) return;\n      url.password = '';\n      for (var i = 0; i < codePoints.length; i++) {\n        url.password += percentEncode(codePoints[i], userinfoPercentEncodeSet);\n      }\n    }),\n    // `URL.prototype.host` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-host\n    host: accessorDescriptor(getHost, function (host) {\n      var url = getInternalURLState(this);\n      if (url.cannotBeABaseURL) return;\n      parseURL(url, String(host), HOST);\n    }),\n    // `URL.prototype.hostname` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-hostname\n    hostname: accessorDescriptor(getHostname, function (hostname) {\n      var url = getInternalURLState(this);\n      if (url.cannotBeABaseURL) return;\n      parseURL(url, String(hostname), HOSTNAME);\n    }),\n    // `URL.prototype.port` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-port\n    port: accessorDescriptor(getPort, function (port) {\n      var url = getInternalURLState(this);\n      if (cannotHaveUsernamePasswordPort(url)) return;\n      port = String(port);\n      if (port == '') url.port = null;\n      else parseURL(url, port, PORT);\n    }),\n    // `URL.prototype.pathname` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-pathname\n    pathname: accessorDescriptor(getPathname, function (pathname) {\n      var url = getInternalURLState(this);\n      if (url.cannotBeABaseURL) return;\n      url.path = [];\n      parseURL(url, pathname + '', PATH_START);\n    }),\n    // `URL.prototype.search` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-search\n    search: accessorDescriptor(getSearch, function (search) {\n      var url = getInternalURLState(this);\n      search = String(search);\n      if (search == '') {\n        url.query = null;\n      } else {\n        if ('?' == search.charAt(0)) search = search.slice(1);\n        url.query = '';\n        parseURL(url, search, QUERY);\n      }\n      getInternalSearchParamsState(url.searchParams).updateSearchParams(url.query);\n    }),\n    // `URL.prototype.searchParams` getter\n    // https://url.spec.whatwg.org/#dom-url-searchparams\n    searchParams: accessorDescriptor(getSearchParams),\n    // `URL.prototype.hash` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-hash\n    hash: accessorDescriptor(getHash, function (hash) {\n      var url = getInternalURLState(this);\n      hash = String(hash);\n      if (hash == '') {\n        url.fragment = null;\n        return;\n      }\n      if ('#' == hash.charAt(0)) hash = hash.slice(1);\n      url.fragment = '';\n      parseURL(url, hash, FRAGMENT);\n    })\n  });\n}\n\n// `URL.prototype.toJSON` method\n// https://url.spec.whatwg.org/#dom-url-tojson\nredefine(URLPrototype, 'toJSON', function toJSON() {\n  return serializeURL.call(this);\n}, { enumerable: true });\n\n// `URL.prototype.toString` method\n// https://url.spec.whatwg.org/#URL-stringification-behavior\nredefine(URLPrototype, 'toString', function toString() {\n  return serializeURL.call(this);\n}, { enumerable: true });\n\nif (NativeURL) {\n  var nativeCreateObjectURL = NativeURL.createObjectURL;\n  var nativeRevokeObjectURL = NativeURL.revokeObjectURL;\n  // `URL.createObjectURL` method\n  // https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL\n  // eslint-disable-next-line no-unused-vars\n  if (nativeCreateObjectURL) redefine(URLConstructor, 'createObjectURL', function createObjectURL(blob) {\n    return nativeCreateObjectURL.apply(NativeURL, arguments);\n  });\n  // `URL.revokeObjectURL` method\n  // https://developer.mozilla.org/en-US/docs/Web/API/URL/revokeObjectURL\n  // eslint-disable-next-line no-unused-vars\n  if (nativeRevokeObjectURL) redefine(URLConstructor, 'revokeObjectURL', function revokeObjectURL(url) {\n    return nativeRevokeObjectURL.apply(NativeURL, arguments);\n  });\n}\n\nsetToStringTag(URLConstructor, 'URL');\n\n$({ global: true, forced: !USE_NATIVE_URL, sham: !DESCRIPTORS }, {\n  URL: URLConstructor\n});\n","'use strict';\nvar $ = require('../internals/export');\n\n// `URL.prototype.toJSON` method\n// https://url.spec.whatwg.org/#dom-url-tojson\n$({ target: 'URL', proto: true, enumerable: true }, {\n  toJSON: function toJSON() {\n    return URL.prototype.toString.call(this);\n  }\n});\n","// Top level file is just a mixin of submodules & constants\n'use strict';\n\nvar assign    = require('./lib/utils/common').assign;\n\nvar deflate   = require('./lib/deflate');\nvar inflate   = require('./lib/inflate');\nvar constants = require('./lib/zlib/constants');\n\nvar pako = {};\n\nassign(pako, deflate, inflate, constants);\n\nmodule.exports = pako;\n","'use strict';\n\n\nvar zlib_deflate = require('./zlib/deflate');\nvar utils        = require('./utils/common');\nvar strings      = require('./utils/strings');\nvar msg          = require('./zlib/messages');\nvar ZStream      = require('./zlib/zstream');\n\nvar toString = Object.prototype.toString;\n\n/* Public constants ==========================================================*/\n/* ===========================================================================*/\n\nvar Z_NO_FLUSH      = 0;\nvar Z_FINISH        = 4;\n\nvar Z_OK            = 0;\nvar Z_STREAM_END    = 1;\nvar Z_SYNC_FLUSH    = 2;\n\nvar Z_DEFAULT_COMPRESSION = -1;\n\nvar Z_DEFAULT_STRATEGY    = 0;\n\nvar Z_DEFLATED  = 8;\n\n/* ===========================================================================*/\n\n\n/**\n * class Deflate\n *\n * Generic JS-style wrapper for zlib calls. If you don't need\n * streaming behaviour - use more simple functions: [[deflate]],\n * [[deflateRaw]] and [[gzip]].\n **/\n\n/* internal\n * Deflate.chunks -> Array\n *\n * Chunks of output data, if [[Deflate#onData]] not overridden.\n **/\n\n/**\n * Deflate.result -> Uint8Array|Array\n *\n * Compressed result, generated by default [[Deflate#onData]]\n * and [[Deflate#onEnd]] handlers. Filled after you push last chunk\n * (call [[Deflate#push]] with `Z_FINISH` / `true` param)  or if you\n * push a chunk with explicit flush (call [[Deflate#push]] with\n * `Z_SYNC_FLUSH` param).\n **/\n\n/**\n * Deflate.err -> Number\n *\n * Error code after deflate finished. 0 (Z_OK) on success.\n * You will not need it in real life, because deflate errors\n * are possible only on wrong options or bad `onData` / `onEnd`\n * custom handlers.\n **/\n\n/**\n * Deflate.msg -> String\n *\n * Error message, if [[Deflate.err]] != 0\n **/\n\n\n/**\n * new Deflate(options)\n * - options (Object): zlib deflate options.\n *\n * Creates new deflator instance with specified params. Throws exception\n * on bad params. Supported options:\n *\n * - `level`\n * - `windowBits`\n * - `memLevel`\n * - `strategy`\n * - `dictionary`\n *\n * [http://zlib.net/manual.html#Advanced](http://zlib.net/manual.html#Advanced)\n * for more information on these.\n *\n * Additional options, for internal needs:\n *\n * - `chunkSize` - size of generated data chunks (16K by default)\n * - `raw` (Boolean) - do raw deflate\n * - `gzip` (Boolean) - create gzip wrapper\n * - `to` (String) - if equal to 'string', then result will be \"binary string\"\n *    (each char code [0..255])\n * - `header` (Object) - custom header for gzip\n *   - `text` (Boolean) - true if compressed data believed to be text\n *   - `time` (Number) - modification time, unix timestamp\n *   - `os` (Number) - operation system code\n *   - `extra` (Array) - array of bytes with extra data (max 65536)\n *   - `name` (String) - file name (binary string)\n *   - `comment` (String) - comment (binary string)\n *   - `hcrc` (Boolean) - true if header crc should be added\n *\n * ##### Example:\n *\n * ```javascript\n * var pako = require('pako')\n *   , chunk1 = Uint8Array([1,2,3,4,5,6,7,8,9])\n *   , chunk2 = Uint8Array([10,11,12,13,14,15,16,17,18,19]);\n *\n * var deflate = new pako.Deflate({ level: 3});\n *\n * deflate.push(chunk1, false);\n * deflate.push(chunk2, true);  // true -> last chunk\n *\n * if (deflate.err) { throw new Error(deflate.err); }\n *\n * console.log(deflate.result);\n * ```\n **/\nfunction Deflate(options) {\n  if (!(this instanceof Deflate)) return new Deflate(options);\n\n  this.options = utils.assign({\n    level: Z_DEFAULT_COMPRESSION,\n    method: Z_DEFLATED,\n    chunkSize: 16384,\n    windowBits: 15,\n    memLevel: 8,\n    strategy: Z_DEFAULT_STRATEGY,\n    to: ''\n  }, options || {});\n\n  var opt = this.options;\n\n  if (opt.raw && (opt.windowBits > 0)) {\n    opt.windowBits = -opt.windowBits;\n  }\n\n  else if (opt.gzip && (opt.windowBits > 0) && (opt.windowBits < 16)) {\n    opt.windowBits += 16;\n  }\n\n  this.err    = 0;      // error code, if happens (0 = Z_OK)\n  this.msg    = '';     // error message\n  this.ended  = false;  // used to avoid multiple onEnd() calls\n  this.chunks = [];     // chunks of compressed data\n\n  this.strm = new ZStream();\n  this.strm.avail_out = 0;\n\n  var status = zlib_deflate.deflateInit2(\n    this.strm,\n    opt.level,\n    opt.method,\n    opt.windowBits,\n    opt.memLevel,\n    opt.strategy\n  );\n\n  if (status !== Z_OK) {\n    throw new Error(msg[status]);\n  }\n\n  if (opt.header) {\n    zlib_deflate.deflateSetHeader(this.strm, opt.header);\n  }\n\n  if (opt.dictionary) {\n    var dict;\n    // Convert data if needed\n    if (typeof opt.dictionary === 'string') {\n      // If we need to compress text, change encoding to utf8.\n      dict = strings.string2buf(opt.dictionary);\n    } else if (toString.call(opt.dictionary) === '[object ArrayBuffer]') {\n      dict = new Uint8Array(opt.dictionary);\n    } else {\n      dict = opt.dictionary;\n    }\n\n    status = zlib_deflate.deflateSetDictionary(this.strm, dict);\n\n    if (status !== Z_OK) {\n      throw new Error(msg[status]);\n    }\n\n    this._dict_set = true;\n  }\n}\n\n/**\n * Deflate#push(data[, mode]) -> Boolean\n * - data (Uint8Array|Array|ArrayBuffer|String): input data. Strings will be\n *   converted to utf8 byte sequence.\n * - mode (Number|Boolean): 0..6 for corresponding Z_NO_FLUSH..Z_TREE modes.\n *   See constants. Skipped or `false` means Z_NO_FLUSH, `true` means Z_FINISH.\n *\n * Sends input data to deflate pipe, generating [[Deflate#onData]] calls with\n * new compressed chunks. Returns `true` on success. The last data block must have\n * mode Z_FINISH (or `true`). That will flush internal pending buffers and call\n * [[Deflate#onEnd]]. For interim explicit flushes (without ending the stream) you\n * can use mode Z_SYNC_FLUSH, keeping the compression context.\n *\n * On fail call [[Deflate#onEnd]] with error code and return false.\n *\n * We strongly recommend to use `Uint8Array` on input for best speed (output\n * array format is detected automatically). Also, don't skip last param and always\n * use the same type in your code (boolean or number). That will improve JS speed.\n *\n * For regular `Array`-s make sure all elements are [0..255].\n *\n * ##### Example\n *\n * ```javascript\n * push(chunk, false); // push one of data chunks\n * ...\n * push(chunk, true);  // push last chunk\n * ```\n **/\nDeflate.prototype.push = function (data, mode) {\n  var strm = this.strm;\n  var chunkSize = this.options.chunkSize;\n  var status, _mode;\n\n  if (this.ended) { return false; }\n\n  _mode = (mode === ~~mode) ? mode : ((mode === true) ? Z_FINISH : Z_NO_FLUSH);\n\n  // Convert data if needed\n  if (typeof data === 'string') {\n    // If we need to compress text, change encoding to utf8.\n    strm.input = strings.string2buf(data);\n  } else if (toString.call(data) === '[object ArrayBuffer]') {\n    strm.input = new Uint8Array(data);\n  } else {\n    strm.input = data;\n  }\n\n  strm.next_in = 0;\n  strm.avail_in = strm.input.length;\n\n  do {\n    if (strm.avail_out === 0) {\n      strm.output = new utils.Buf8(chunkSize);\n      strm.next_out = 0;\n      strm.avail_out = chunkSize;\n    }\n    status = zlib_deflate.deflate(strm, _mode);    /* no bad return value */\n\n    if (status !== Z_STREAM_END && status !== Z_OK) {\n      this.onEnd(status);\n      this.ended = true;\n      return false;\n    }\n    if (strm.avail_out === 0 || (strm.avail_in === 0 && (_mode === Z_FINISH || _mode === Z_SYNC_FLUSH))) {\n      if (this.options.to === 'string') {\n        this.onData(strings.buf2binstring(utils.shrinkBuf(strm.output, strm.next_out)));\n      } else {\n        this.onData(utils.shrinkBuf(strm.output, strm.next_out));\n      }\n    }\n  } while ((strm.avail_in > 0 || strm.avail_out === 0) && status !== Z_STREAM_END);\n\n  // Finalize on the last chunk.\n  if (_mode === Z_FINISH) {\n    status = zlib_deflate.deflateEnd(this.strm);\n    this.onEnd(status);\n    this.ended = true;\n    return status === Z_OK;\n  }\n\n  // callback interim results if Z_SYNC_FLUSH.\n  if (_mode === Z_SYNC_FLUSH) {\n    this.onEnd(Z_OK);\n    strm.avail_out = 0;\n    return true;\n  }\n\n  return true;\n};\n\n\n/**\n * Deflate#onData(chunk) -> Void\n * - chunk (Uint8Array|Array|String): output data. Type of array depends\n *   on js engine support. When string output requested, each chunk\n *   will be string.\n *\n * By default, stores data blocks in `chunks[]` property and glue\n * those in `onEnd`. Override this handler, if you need another behaviour.\n **/\nDeflate.prototype.onData = function (chunk) {\n  this.chunks.push(chunk);\n};\n\n\n/**\n * Deflate#onEnd(status) -> Void\n * - status (Number): deflate status. 0 (Z_OK) on success,\n *   other if not.\n *\n * Called once after you tell deflate that the input stream is\n * complete (Z_FINISH) or should be flushed (Z_SYNC_FLUSH)\n * or if an error happened. By default - join collected chunks,\n * free memory and fill `results` / `err` properties.\n **/\nDeflate.prototype.onEnd = function (status) {\n  // On success - join\n  if (status === Z_OK) {\n    if (this.options.to === 'string') {\n      this.result = this.chunks.join('');\n    } else {\n      this.result = utils.flattenChunks(this.chunks);\n    }\n  }\n  this.chunks = [];\n  this.err = status;\n  this.msg = this.strm.msg;\n};\n\n\n/**\n * deflate(data[, options]) -> Uint8Array|Array|String\n * - data (Uint8Array|Array|String): input data to compress.\n * - options (Object): zlib deflate options.\n *\n * Compress `data` with deflate algorithm and `options`.\n *\n * Supported options are:\n *\n * - level\n * - windowBits\n * - memLevel\n * - strategy\n * - dictionary\n *\n * [http://zlib.net/manual.html#Advanced](http://zlib.net/manual.html#Advanced)\n * for more information on these.\n *\n * Sugar (options):\n *\n * - `raw` (Boolean) - say that we work with raw stream, if you don't wish to specify\n *   negative windowBits implicitly.\n * - `to` (String) - if equal to 'string', then result will be \"binary string\"\n *    (each char code [0..255])\n *\n * ##### Example:\n *\n * ```javascript\n * var pako = require('pako')\n *   , data = Uint8Array([1,2,3,4,5,6,7,8,9]);\n *\n * console.log(pako.deflate(data));\n * ```\n **/\nfunction deflate(input, options) {\n  var deflator = new Deflate(options);\n\n  deflator.push(input, true);\n\n  // That will never happens, if you don't cheat with options :)\n  if (deflator.err) { throw deflator.msg || msg[deflator.err]; }\n\n  return deflator.result;\n}\n\n\n/**\n * deflateRaw(data[, options]) -> Uint8Array|Array|String\n * - data (Uint8Array|Array|String): input data to compress.\n * - options (Object): zlib deflate options.\n *\n * The same as [[deflate]], but creates raw data, without wrapper\n * (header and adler32 crc).\n **/\nfunction deflateRaw(input, options) {\n  options = options || {};\n  options.raw = true;\n  return deflate(input, options);\n}\n\n\n/**\n * gzip(data[, options]) -> Uint8Array|Array|String\n * - data (Uint8Array|Array|String): input data to compress.\n * - options (Object): zlib deflate options.\n *\n * The same as [[deflate]], but create gzip wrapper instead of\n * deflate one.\n **/\nfunction gzip(input, options) {\n  options = options || {};\n  options.gzip = true;\n  return deflate(input, options);\n}\n\n\nexports.Deflate = Deflate;\nexports.deflate = deflate;\nexports.deflateRaw = deflateRaw;\nexports.gzip = gzip;\n","'use strict';\n\n\nvar zlib_inflate = require('./zlib/inflate');\nvar utils        = require('./utils/common');\nvar strings      = require('./utils/strings');\nvar c            = require('./zlib/constants');\nvar msg          = require('./zlib/messages');\nvar ZStream      = require('./zlib/zstream');\nvar GZheader     = require('./zlib/gzheader');\n\nvar toString = Object.prototype.toString;\n\n/**\n * class Inflate\n *\n * Generic JS-style wrapper for zlib calls. If you don't need\n * streaming behaviour - use more simple functions: [[inflate]]\n * and [[inflateRaw]].\n **/\n\n/* internal\n * inflate.chunks -> Array\n *\n * Chunks of output data, if [[Inflate#onData]] not overridden.\n **/\n\n/**\n * Inflate.result -> Uint8Array|Array|String\n *\n * Uncompressed result, generated by default [[Inflate#onData]]\n * and [[Inflate#onEnd]] handlers. Filled after you push last chunk\n * (call [[Inflate#push]] with `Z_FINISH` / `true` param) or if you\n * push a chunk with explicit flush (call [[Inflate#push]] with\n * `Z_SYNC_FLUSH` param).\n **/\n\n/**\n * Inflate.err -> Number\n *\n * Error code after inflate finished. 0 (Z_OK) on success.\n * Should be checked if broken data possible.\n **/\n\n/**\n * Inflate.msg -> String\n *\n * Error message, if [[Inflate.err]] != 0\n **/\n\n\n/**\n * new Inflate(options)\n * - options (Object): zlib inflate options.\n *\n * Creates new inflator instance with specified params. Throws exception\n * on bad params. Supported options:\n *\n * - `windowBits`\n * - `dictionary`\n *\n * [http://zlib.net/manual.html#Advanced](http://zlib.net/manual.html#Advanced)\n * for more information on these.\n *\n * Additional options, for internal needs:\n *\n * - `chunkSize` - size of generated data chunks (16K by default)\n * - `raw` (Boolean) - do raw inflate\n * - `to` (String) - if equal to 'string', then result will be converted\n *   from utf8 to utf16 (javascript) string. When string output requested,\n *   chunk length can differ from `chunkSize`, depending on content.\n *\n * By default, when no options set, autodetect deflate/gzip data format via\n * wrapper header.\n *\n * ##### Example:\n *\n * ```javascript\n * var pako = require('pako')\n *   , chunk1 = Uint8Array([1,2,3,4,5,6,7,8,9])\n *   , chunk2 = Uint8Array([10,11,12,13,14,15,16,17,18,19]);\n *\n * var inflate = new pako.Inflate({ level: 3});\n *\n * inflate.push(chunk1, false);\n * inflate.push(chunk2, true);  // true -> last chunk\n *\n * if (inflate.err) { throw new Error(inflate.err); }\n *\n * console.log(inflate.result);\n * ```\n **/\nfunction Inflate(options) {\n  if (!(this instanceof Inflate)) return new Inflate(options);\n\n  this.options = utils.assign({\n    chunkSize: 16384,\n    windowBits: 0,\n    to: ''\n  }, options || {});\n\n  var opt = this.options;\n\n  // Force window size for `raw` data, if not set directly,\n  // because we have no header for autodetect.\n  if (opt.raw && (opt.windowBits >= 0) && (opt.windowBits < 16)) {\n    opt.windowBits = -opt.windowBits;\n    if (opt.windowBits === 0) { opt.windowBits = -15; }\n  }\n\n  // If `windowBits` not defined (and mode not raw) - set autodetect flag for gzip/deflate\n  if ((opt.windowBits >= 0) && (opt.windowBits < 16) &&\n      !(options && options.windowBits)) {\n    opt.windowBits += 32;\n  }\n\n  // Gzip header has no info about windows size, we can do autodetect only\n  // for deflate. So, if window size not set, force it to max when gzip possible\n  if ((opt.windowBits > 15) && (opt.windowBits < 48)) {\n    // bit 3 (16) -> gzipped data\n    // bit 4 (32) -> autodetect gzip/deflate\n    if ((opt.windowBits & 15) === 0) {\n      opt.windowBits |= 15;\n    }\n  }\n\n  this.err    = 0;      // error code, if happens (0 = Z_OK)\n  this.msg    = '';     // error message\n  this.ended  = false;  // used to avoid multiple onEnd() calls\n  this.chunks = [];     // chunks of compressed data\n\n  this.strm   = new ZStream();\n  this.strm.avail_out = 0;\n\n  var status  = zlib_inflate.inflateInit2(\n    this.strm,\n    opt.windowBits\n  );\n\n  if (status !== c.Z_OK) {\n    throw new Error(msg[status]);\n  }\n\n  this.header = new GZheader();\n\n  zlib_inflate.inflateGetHeader(this.strm, this.header);\n\n  // Setup dictionary\n  if (opt.dictionary) {\n    // Convert data if needed\n    if (typeof opt.dictionary === 'string') {\n      opt.dictionary = strings.string2buf(opt.dictionary);\n    } else if (toString.call(opt.dictionary) === '[object ArrayBuffer]') {\n      opt.dictionary = new Uint8Array(opt.dictionary);\n    }\n    if (opt.raw) { //In raw mode we need to set the dictionary early\n      status = zlib_inflate.inflateSetDictionary(this.strm, opt.dictionary);\n      if (status !== c.Z_OK) {\n        throw new Error(msg[status]);\n      }\n    }\n  }\n}\n\n/**\n * Inflate#push(data[, mode]) -> Boolean\n * - data (Uint8Array|Array|ArrayBuffer|String): input data\n * - mode (Number|Boolean): 0..6 for corresponding Z_NO_FLUSH..Z_TREE modes.\n *   See constants. Skipped or `false` means Z_NO_FLUSH, `true` means Z_FINISH.\n *\n * Sends input data to inflate pipe, generating [[Inflate#onData]] calls with\n * new output chunks. Returns `true` on success. The last data block must have\n * mode Z_FINISH (or `true`). That will flush internal pending buffers and call\n * [[Inflate#onEnd]]. For interim explicit flushes (without ending the stream) you\n * can use mode Z_SYNC_FLUSH, keeping the decompression context.\n *\n * On fail call [[Inflate#onEnd]] with error code and return false.\n *\n * We strongly recommend to use `Uint8Array` on input for best speed (output\n * format is detected automatically). Also, don't skip last param and always\n * use the same type in your code (boolean or number). That will improve JS speed.\n *\n * For regular `Array`-s make sure all elements are [0..255].\n *\n * ##### Example\n *\n * ```javascript\n * push(chunk, false); // push one of data chunks\n * ...\n * push(chunk, true);  // push last chunk\n * ```\n **/\nInflate.prototype.push = function (data, mode) {\n  var strm = this.strm;\n  var chunkSize = this.options.chunkSize;\n  var dictionary = this.options.dictionary;\n  var status, _mode;\n  var next_out_utf8, tail, utf8str;\n\n  // Flag to properly process Z_BUF_ERROR on testing inflate call\n  // when we check that all output data was flushed.\n  var allowBufError = false;\n\n  if (this.ended) { return false; }\n  _mode = (mode === ~~mode) ? mode : ((mode === true) ? c.Z_FINISH : c.Z_NO_FLUSH);\n\n  // Convert data if needed\n  if (typeof data === 'string') {\n    // Only binary strings can be decompressed on practice\n    strm.input = strings.binstring2buf(data);\n  } else if (toString.call(data) === '[object ArrayBuffer]') {\n    strm.input = new Uint8Array(data);\n  } else {\n    strm.input = data;\n  }\n\n  strm.next_in = 0;\n  strm.avail_in = strm.input.length;\n\n  do {\n    if (strm.avail_out === 0) {\n      strm.output = new utils.Buf8(chunkSize);\n      strm.next_out = 0;\n      strm.avail_out = chunkSize;\n    }\n\n    status = zlib_inflate.inflate(strm, c.Z_NO_FLUSH);    /* no bad return value */\n\n    if (status === c.Z_NEED_DICT && dictionary) {\n      status = zlib_inflate.inflateSetDictionary(this.strm, dictionary);\n    }\n\n    if (status === c.Z_BUF_ERROR && allowBufError === true) {\n      status = c.Z_OK;\n      allowBufError = false;\n    }\n\n    if (status !== c.Z_STREAM_END && status !== c.Z_OK) {\n      this.onEnd(status);\n      this.ended = true;\n      return false;\n    }\n\n    if (strm.next_out) {\n      if (strm.avail_out === 0 || status === c.Z_STREAM_END || (strm.avail_in === 0 && (_mode === c.Z_FINISH || _mode === c.Z_SYNC_FLUSH))) {\n\n        if (this.options.to === 'string') {\n\n          next_out_utf8 = strings.utf8border(strm.output, strm.next_out);\n\n          tail = strm.next_out - next_out_utf8;\n          utf8str = strings.buf2string(strm.output, next_out_utf8);\n\n          // move tail\n          strm.next_out = tail;\n          strm.avail_out = chunkSize - tail;\n          if (tail) { utils.arraySet(strm.output, strm.output, next_out_utf8, tail, 0); }\n\n          this.onData(utf8str);\n\n        } else {\n          this.onData(utils.shrinkBuf(strm.output, strm.next_out));\n        }\n      }\n    }\n\n    // When no more input data, we should check that internal inflate buffers\n    // are flushed. The only way to do it when avail_out = 0 - run one more\n    // inflate pass. But if output data not exists, inflate return Z_BUF_ERROR.\n    // Here we set flag to process this error properly.\n    //\n    // NOTE. Deflate does not return error in this case and does not needs such\n    // logic.\n    if (strm.avail_in === 0 && strm.avail_out === 0) {\n      allowBufError = true;\n    }\n\n  } while ((strm.avail_in > 0 || strm.avail_out === 0) && status !== c.Z_STREAM_END);\n\n  if (status === c.Z_STREAM_END) {\n    _mode = c.Z_FINISH;\n  }\n\n  // Finalize on the last chunk.\n  if (_mode === c.Z_FINISH) {\n    status = zlib_inflate.inflateEnd(this.strm);\n    this.onEnd(status);\n    this.ended = true;\n    return status === c.Z_OK;\n  }\n\n  // callback interim results if Z_SYNC_FLUSH.\n  if (_mode === c.Z_SYNC_FLUSH) {\n    this.onEnd(c.Z_OK);\n    strm.avail_out = 0;\n    return true;\n  }\n\n  return true;\n};\n\n\n/**\n * Inflate#onData(chunk) -> Void\n * - chunk (Uint8Array|Array|String): output data. Type of array depends\n *   on js engine support. When string output requested, each chunk\n *   will be string.\n *\n * By default, stores data blocks in `chunks[]` property and glue\n * those in `onEnd`. Override this handler, if you need another behaviour.\n **/\nInflate.prototype.onData = function (chunk) {\n  this.chunks.push(chunk);\n};\n\n\n/**\n * Inflate#onEnd(status) -> Void\n * - status (Number): inflate status. 0 (Z_OK) on success,\n *   other if not.\n *\n * Called either after you tell inflate that the input stream is\n * complete (Z_FINISH) or should be flushed (Z_SYNC_FLUSH)\n * or if an error happened. By default - join collected chunks,\n * free memory and fill `results` / `err` properties.\n **/\nInflate.prototype.onEnd = function (status) {\n  // On success - join\n  if (status === c.Z_OK) {\n    if (this.options.to === 'string') {\n      // Glue & convert here, until we teach pako to send\n      // utf8 aligned strings to onData\n      this.result = this.chunks.join('');\n    } else {\n      this.result = utils.flattenChunks(this.chunks);\n    }\n  }\n  this.chunks = [];\n  this.err = status;\n  this.msg = this.strm.msg;\n};\n\n\n/**\n * inflate(data[, options]) -> Uint8Array|Array|String\n * - data (Uint8Array|Array|String): input data to decompress.\n * - options (Object): zlib inflate options.\n *\n * Decompress `data` with inflate/ungzip and `options`. Autodetect\n * format via wrapper header by default. That's why we don't provide\n * separate `ungzip` method.\n *\n * Supported options are:\n *\n * - windowBits\n *\n * [http://zlib.net/manual.html#Advanced](http://zlib.net/manual.html#Advanced)\n * for more information.\n *\n * Sugar (options):\n *\n * - `raw` (Boolean) - say that we work with raw stream, if you don't wish to specify\n *   negative windowBits implicitly.\n * - `to` (String) - if equal to 'string', then result will be converted\n *   from utf8 to utf16 (javascript) string. When string output requested,\n *   chunk length can differ from `chunkSize`, depending on content.\n *\n *\n * ##### Example:\n *\n * ```javascript\n * var pako = require('pako')\n *   , input = pako.deflate([1,2,3,4,5,6,7,8,9])\n *   , output;\n *\n * try {\n *   output = pako.inflate(input);\n * } catch (err)\n *   console.log(err);\n * }\n * ```\n **/\nfunction inflate(input, options) {\n  var inflator = new Inflate(options);\n\n  inflator.push(input, true);\n\n  // That will never happens, if you don't cheat with options :)\n  if (inflator.err) { throw inflator.msg || msg[inflator.err]; }\n\n  return inflator.result;\n}\n\n\n/**\n * inflateRaw(data[, options]) -> Uint8Array|Array|String\n * - data (Uint8Array|Array|String): input data to decompress.\n * - options (Object): zlib inflate options.\n *\n * The same as [[inflate]], but creates raw data, without wrapper\n * (header and adler32 crc).\n **/\nfunction inflateRaw(input, options) {\n  options = options || {};\n  options.raw = true;\n  return inflate(input, options);\n}\n\n\n/**\n * ungzip(data[, options]) -> Uint8Array|Array|String\n * - data (Uint8Array|Array|String): input data to decompress.\n * - options (Object): zlib inflate options.\n *\n * Just shortcut to [[inflate]], because it autodetects format\n * by header.content. Done for convenience.\n **/\n\n\nexports.Inflate = Inflate;\nexports.inflate = inflate;\nexports.inflateRaw = inflateRaw;\nexports.ungzip  = inflate;\n","'use strict';\n\n\nvar TYPED_OK =  (typeof Uint8Array !== 'undefined') &&\n                (typeof Uint16Array !== 'undefined') &&\n                (typeof Int32Array !== 'undefined');\n\nfunction _has(obj, key) {\n  return Object.prototype.hasOwnProperty.call(obj, key);\n}\n\nexports.assign = function (obj /*from1, from2, from3, ...*/) {\n  var sources = Array.prototype.slice.call(arguments, 1);\n  while (sources.length) {\n    var source = sources.shift();\n    if (!source) { continue; }\n\n    if (typeof source !== 'object') {\n      throw new TypeError(source + 'must be non-object');\n    }\n\n    for (var p in source) {\n      if (_has(source, p)) {\n        obj[p] = source[p];\n      }\n    }\n  }\n\n  return obj;\n};\n\n\n// reduce buffer size, avoiding mem copy\nexports.shrinkBuf = function (buf, size) {\n  if (buf.length === size) { return buf; }\n  if (buf.subarray) { return buf.subarray(0, size); }\n  buf.length = size;\n  return buf;\n};\n\n\nvar fnTyped = {\n  arraySet: function (dest, src, src_offs, len, dest_offs) {\n    if (src.subarray && dest.subarray) {\n      dest.set(src.subarray(src_offs, src_offs + len), dest_offs);\n      return;\n    }\n    // Fallback to ordinary array\n    for (var i = 0; i < len; i++) {\n      dest[dest_offs + i] = src[src_offs + i];\n    }\n  },\n  // Join array of chunks to single array.\n  flattenChunks: function (chunks) {\n    var i, l, len, pos, chunk, result;\n\n    // calculate data length\n    len = 0;\n    for (i = 0, l = chunks.length; i < l; i++) {\n      len += chunks[i].length;\n    }\n\n    // join chunks\n    result = new Uint8Array(len);\n    pos = 0;\n    for (i = 0, l = chunks.length; i < l; i++) {\n      chunk = chunks[i];\n      result.set(chunk, pos);\n      pos += chunk.length;\n    }\n\n    return result;\n  }\n};\n\nvar fnUntyped = {\n  arraySet: function (dest, src, src_offs, len, dest_offs) {\n    for (var i = 0; i < len; i++) {\n      dest[dest_offs + i] = src[src_offs + i];\n    }\n  },\n  // Join array of chunks to single array.\n  flattenChunks: function (chunks) {\n    return [].concat.apply([], chunks);\n  }\n};\n\n\n// Enable/Disable typed arrays use, for testing\n//\nexports.setTyped = function (on) {\n  if (on) {\n    exports.Buf8  = Uint8Array;\n    exports.Buf16 = Uint16Array;\n    exports.Buf32 = Int32Array;\n    exports.assign(exports, fnTyped);\n  } else {\n    exports.Buf8  = Array;\n    exports.Buf16 = Array;\n    exports.Buf32 = Array;\n    exports.assign(exports, fnUntyped);\n  }\n};\n\nexports.setTyped(TYPED_OK);\n","// String encode/decode helpers\n'use strict';\n\n\nvar utils = require('./common');\n\n\n// Quick check if we can use fast array to bin string conversion\n//\n// - apply(Array) can fail on Android 2.2\n// - apply(Uint8Array) can fail on iOS 5.1 Safari\n//\nvar STR_APPLY_OK = true;\nvar STR_APPLY_UIA_OK = true;\n\ntry { String.fromCharCode.apply(null, [ 0 ]); } catch (__) { STR_APPLY_OK = false; }\ntry { String.fromCharCode.apply(null, new Uint8Array(1)); } catch (__) { STR_APPLY_UIA_OK = false; }\n\n\n// Table with utf8 lengths (calculated by first byte of sequence)\n// Note, that 5 & 6-byte values and some 4-byte values can not be represented in JS,\n// because max possible codepoint is 0x10ffff\nvar _utf8len = new utils.Buf8(256);\nfor (var q = 0; q < 256; q++) {\n  _utf8len[q] = (q >= 252 ? 6 : q >= 248 ? 5 : q >= 240 ? 4 : q >= 224 ? 3 : q >= 192 ? 2 : 1);\n}\n_utf8len[254] = _utf8len[254] = 1; // Invalid sequence start\n\n\n// convert string to array (typed, when possible)\nexports.string2buf = function (str) {\n  var buf, c, c2, m_pos, i, str_len = str.length, buf_len = 0;\n\n  // count binary size\n  for (m_pos = 0; m_pos < str_len; m_pos++) {\n    c = str.charCodeAt(m_pos);\n    if ((c & 0xfc00) === 0xd800 && (m_pos + 1 < str_len)) {\n      c2 = str.charCodeAt(m_pos + 1);\n      if ((c2 & 0xfc00) === 0xdc00) {\n        c = 0x10000 + ((c - 0xd800) << 10) + (c2 - 0xdc00);\n        m_pos++;\n      }\n    }\n    buf_len += c < 0x80 ? 1 : c < 0x800 ? 2 : c < 0x10000 ? 3 : 4;\n  }\n\n  // allocate buffer\n  buf = new utils.Buf8(buf_len);\n\n  // convert\n  for (i = 0, m_pos = 0; i < buf_len; m_pos++) {\n    c = str.charCodeAt(m_pos);\n    if ((c & 0xfc00) === 0xd800 && (m_pos + 1 < str_len)) {\n      c2 = str.charCodeAt(m_pos + 1);\n      if ((c2 & 0xfc00) === 0xdc00) {\n        c = 0x10000 + ((c - 0xd800) << 10) + (c2 - 0xdc00);\n        m_pos++;\n      }\n    }\n    if (c < 0x80) {\n      /* one byte */\n      buf[i++] = c;\n    } else if (c < 0x800) {\n      /* two bytes */\n      buf[i++] = 0xC0 | (c >>> 6);\n      buf[i++] = 0x80 | (c & 0x3f);\n    } else if (c < 0x10000) {\n      /* three bytes */\n      buf[i++] = 0xE0 | (c >>> 12);\n      buf[i++] = 0x80 | (c >>> 6 & 0x3f);\n      buf[i++] = 0x80 | (c & 0x3f);\n    } else {\n      /* four bytes */\n      buf[i++] = 0xf0 | (c >>> 18);\n      buf[i++] = 0x80 | (c >>> 12 & 0x3f);\n      buf[i++] = 0x80 | (c >>> 6 & 0x3f);\n      buf[i++] = 0x80 | (c & 0x3f);\n    }\n  }\n\n  return buf;\n};\n\n// Helper (used in 2 places)\nfunction buf2binstring(buf, len) {\n  // On Chrome, the arguments in a function call that are allowed is `65534`.\n  // If the length of the buffer is smaller than that, we can use this optimization,\n  // otherwise we will take a slower path.\n  if (len < 65534) {\n    if ((buf.subarray && STR_APPLY_UIA_OK) || (!buf.subarray && STR_APPLY_OK)) {\n      return String.fromCharCode.apply(null, utils.shrinkBuf(buf, len));\n    }\n  }\n\n  var result = '';\n  for (var i = 0; i < len; i++) {\n    result += String.fromCharCode(buf[i]);\n  }\n  return result;\n}\n\n\n// Convert byte array to binary string\nexports.buf2binstring = function (buf) {\n  return buf2binstring(buf, buf.length);\n};\n\n\n// Convert binary string (typed, when possible)\nexports.binstring2buf = function (str) {\n  var buf = new utils.Buf8(str.length);\n  for (var i = 0, len = buf.length; i < len; i++) {\n    buf[i] = str.charCodeAt(i);\n  }\n  return buf;\n};\n\n\n// convert array to string\nexports.buf2string = function (buf, max) {\n  var i, out, c, c_len;\n  var len = max || buf.length;\n\n  // Reserve max possible length (2 words per char)\n  // NB: by unknown reasons, Array is significantly faster for\n  //     String.fromCharCode.apply than Uint16Array.\n  var utf16buf = new Array(len * 2);\n\n  for (out = 0, i = 0; i < len;) {\n    c = buf[i++];\n    // quick process ascii\n    if (c < 0x80) { utf16buf[out++] = c; continue; }\n\n    c_len = _utf8len[c];\n    // skip 5 & 6 byte codes\n    if (c_len > 4) { utf16buf[out++] = 0xfffd; i += c_len - 1; continue; }\n\n    // apply mask on first byte\n    c &= c_len === 2 ? 0x1f : c_len === 3 ? 0x0f : 0x07;\n    // join the rest\n    while (c_len > 1 && i < len) {\n      c = (c << 6) | (buf[i++] & 0x3f);\n      c_len--;\n    }\n\n    // terminated by end of string?\n    if (c_len > 1) { utf16buf[out++] = 0xfffd; continue; }\n\n    if (c < 0x10000) {\n      utf16buf[out++] = c;\n    } else {\n      c -= 0x10000;\n      utf16buf[out++] = 0xd800 | ((c >> 10) & 0x3ff);\n      utf16buf[out++] = 0xdc00 | (c & 0x3ff);\n    }\n  }\n\n  return buf2binstring(utf16buf, out);\n};\n\n\n// Calculate max possible position in utf8 buffer,\n// that will not break sequence. If that's not possible\n// - (very small limits) return max size as is.\n//\n// buf[] - utf8 bytes array\n// max   - length limit (mandatory);\nexports.utf8border = function (buf, max) {\n  var pos;\n\n  max = max || buf.length;\n  if (max > buf.length) { max = buf.length; }\n\n  // go back from last position, until start of sequence found\n  pos = max - 1;\n  while (pos >= 0 && (buf[pos] & 0xC0) === 0x80) { pos--; }\n\n  // Very small and broken sequence,\n  // return max, because we should return something anyway.\n  if (pos < 0) { return max; }\n\n  // If we came to start of buffer - that means buffer is too small,\n  // return max too.\n  if (pos === 0) { return max; }\n\n  return (pos + _utf8len[buf[pos]] > max) ? pos : max;\n};\n","'use strict';\n\n// Note: adler32 takes 12% for level 0 and 2% for level 6.\n// It isn't worth it to make additional optimizations as in original.\n// Small size is preferable.\n\n// (C) 1995-2013 Jean-loup Gailly and Mark Adler\n// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin\n//\n// This software is provided 'as-is', without any express or implied\n// warranty. In no event will the authors be held liable for any damages\n// arising from the use of this software.\n//\n// Permission is granted to anyone to use this software for any purpose,\n// including commercial applications, and to alter it and redistribute it\n// freely, subject to the following restrictions:\n//\n// 1. The origin of this software must not be misrepresented; you must not\n//   claim that you wrote the original software. If you use this software\n//   in a product, an acknowledgment in the product documentation would be\n//   appreciated but is not required.\n// 2. Altered source versions must be plainly marked as such, and must not be\n//   misrepresented as being the original software.\n// 3. This notice may not be removed or altered from any source distribution.\n\nfunction adler32(adler, buf, len, pos) {\n  var s1 = (adler & 0xffff) |0,\n      s2 = ((adler >>> 16) & 0xffff) |0,\n      n = 0;\n\n  while (len !== 0) {\n    // Set limit ~ twice less than 5552, to keep\n    // s2 in 31-bits, because we force signed ints.\n    // in other case %= will fail.\n    n = len > 2000 ? 2000 : len;\n    len -= n;\n\n    do {\n      s1 = (s1 + buf[pos++]) |0;\n      s2 = (s2 + s1) |0;\n    } while (--n);\n\n    s1 %= 65521;\n    s2 %= 65521;\n  }\n\n  return (s1 | (s2 << 16)) |0;\n}\n\n\nmodule.exports = adler32;\n","'use strict';\n\n// (C) 1995-2013 Jean-loup Gailly and Mark Adler\n// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin\n//\n// This software is provided 'as-is', without any express or implied\n// warranty. In no event will the authors be held liable for any damages\n// arising from the use of this software.\n//\n// Permission is granted to anyone to use this software for any purpose,\n// including commercial applications, and to alter it and redistribute it\n// freely, subject to the following restrictions:\n//\n// 1. The origin of this software must not be misrepresented; you must not\n//   claim that you wrote the original software. If you use this software\n//   in a product, an acknowledgment in the product documentation would be\n//   appreciated but is not required.\n// 2. Altered source versions must be plainly marked as such, and must not be\n//   misrepresented as being the original software.\n// 3. This notice may not be removed or altered from any source distribution.\n\nmodule.exports = {\n\n  /* Allowed flush values; see deflate() and inflate() below for details */\n  Z_NO_FLUSH:         0,\n  Z_PARTIAL_FLUSH:    1,\n  Z_SYNC_FLUSH:       2,\n  Z_FULL_FLUSH:       3,\n  Z_FINISH:           4,\n  Z_BLOCK:            5,\n  Z_TREES:            6,\n\n  /* Return codes for the compression/decompression functions. Negative values\n  * are errors, positive values are used for special but normal events.\n  */\n  Z_OK:               0,\n  Z_STREAM_END:       1,\n  Z_NEED_DICT:        2,\n  Z_ERRNO:           -1,\n  Z_STREAM_ERROR:    -2,\n  Z_DATA_ERROR:      -3,\n  //Z_MEM_ERROR:     -4,\n  Z_BUF_ERROR:       -5,\n  //Z_VERSION_ERROR: -6,\n\n  /* compression levels */\n  Z_NO_COMPRESSION:         0,\n  Z_BEST_SPEED:             1,\n  Z_BEST_COMPRESSION:       9,\n  Z_DEFAULT_COMPRESSION:   -1,\n\n\n  Z_FILTERED:               1,\n  Z_HUFFMAN_ONLY:           2,\n  Z_RLE:                    3,\n  Z_FIXED:                  4,\n  Z_DEFAULT_STRATEGY:       0,\n\n  /* Possible values of the data_type field (though see inflate()) */\n  Z_BINARY:                 0,\n  Z_TEXT:                   1,\n  //Z_ASCII:                1, // = Z_TEXT (deprecated)\n  Z_UNKNOWN:                2,\n\n  /* The deflate compression method */\n  Z_DEFLATED:               8\n  //Z_NULL:                 null // Use -1 or null inline, depending on var type\n};\n","'use strict';\n\n// Note: we can't get significant speed boost here.\n// So write code to minimize size - no pregenerated tables\n// and array tools dependencies.\n\n// (C) 1995-2013 Jean-loup Gailly and Mark Adler\n// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin\n//\n// This software is provided 'as-is', without any express or implied\n// warranty. In no event will the authors be held liable for any damages\n// arising from the use of this software.\n//\n// Permission is granted to anyone to use this software for any purpose,\n// including commercial applications, and to alter it and redistribute it\n// freely, subject to the following restrictions:\n//\n// 1. The origin of this software must not be misrepresented; you must not\n//   claim that you wrote the original software. If you use this software\n//   in a product, an acknowledgment in the product documentation would be\n//   appreciated but is not required.\n// 2. Altered source versions must be plainly marked as such, and must not be\n//   misrepresented as being the original software.\n// 3. This notice may not be removed or altered from any source distribution.\n\n// Use ordinary array, since untyped makes no boost here\nfunction makeTable() {\n  var c, table = [];\n\n  for (var n = 0; n < 256; n++) {\n    c = n;\n    for (var k = 0; k < 8; k++) {\n      c = ((c & 1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1));\n    }\n    table[n] = c;\n  }\n\n  return table;\n}\n\n// Create table on load. Just 255 signed longs. Not a problem.\nvar crcTable = makeTable();\n\n\nfunction crc32(crc, buf, len, pos) {\n  var t = crcTable,\n      end = pos + len;\n\n  crc ^= -1;\n\n  for (var i = pos; i < end; i++) {\n    crc = (crc >>> 8) ^ t[(crc ^ buf[i]) & 0xFF];\n  }\n\n  return (crc ^ (-1)); // >>> 0;\n}\n\n\nmodule.exports = crc32;\n","'use strict';\n\n// (C) 1995-2013 Jean-loup Gailly and Mark Adler\n// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin\n//\n// This software is provided 'as-is', without any express or implied\n// warranty. In no event will the authors be held liable for any damages\n// arising from the use of this software.\n//\n// Permission is granted to anyone to use this software for any purpose,\n// including commercial applications, and to alter it and redistribute it\n// freely, subject to the following restrictions:\n//\n// 1. The origin of this software must not be misrepresented; you must not\n//   claim that you wrote the original software. If you use this software\n//   in a product, an acknowledgment in the product documentation would be\n//   appreciated but is not required.\n// 2. Altered source versions must be plainly marked as such, and must not be\n//   misrepresented as being the original software.\n// 3. This notice may not be removed or altered from any source distribution.\n\nvar utils   = require('../utils/common');\nvar trees   = require('./trees');\nvar adler32 = require('./adler32');\nvar crc32   = require('./crc32');\nvar msg     = require('./messages');\n\n/* Public constants ==========================================================*/\n/* ===========================================================================*/\n\n\n/* Allowed flush values; see deflate() and inflate() below for details */\nvar Z_NO_FLUSH      = 0;\nvar Z_PARTIAL_FLUSH = 1;\n//var Z_SYNC_FLUSH    = 2;\nvar Z_FULL_FLUSH    = 3;\nvar Z_FINISH        = 4;\nvar Z_BLOCK         = 5;\n//var Z_TREES         = 6;\n\n\n/* Return codes for the compression/decompression functions. Negative values\n * are errors, positive values are used for special but normal events.\n */\nvar Z_OK            = 0;\nvar Z_STREAM_END    = 1;\n//var Z_NEED_DICT     = 2;\n//var Z_ERRNO         = -1;\nvar Z_STREAM_ERROR  = -2;\nvar Z_DATA_ERROR    = -3;\n//var Z_MEM_ERROR     = -4;\nvar Z_BUF_ERROR     = -5;\n//var Z_VERSION_ERROR = -6;\n\n\n/* compression levels */\n//var Z_NO_COMPRESSION      = 0;\n//var Z_BEST_SPEED          = 1;\n//var Z_BEST_COMPRESSION    = 9;\nvar Z_DEFAULT_COMPRESSION = -1;\n\n\nvar Z_FILTERED            = 1;\nvar Z_HUFFMAN_ONLY        = 2;\nvar Z_RLE                 = 3;\nvar Z_FIXED               = 4;\nvar Z_DEFAULT_STRATEGY    = 0;\n\n/* Possible values of the data_type field (though see inflate()) */\n//var Z_BINARY              = 0;\n//var Z_TEXT                = 1;\n//var Z_ASCII               = 1; // = Z_TEXT\nvar Z_UNKNOWN             = 2;\n\n\n/* The deflate compression method */\nvar Z_DEFLATED  = 8;\n\n/*============================================================================*/\n\n\nvar MAX_MEM_LEVEL = 9;\n/* Maximum value for memLevel in deflateInit2 */\nvar MAX_WBITS = 15;\n/* 32K LZ77 window */\nvar DEF_MEM_LEVEL = 8;\n\n\nvar LENGTH_CODES  = 29;\n/* number of length codes, not counting the special END_BLOCK code */\nvar LITERALS      = 256;\n/* number of literal bytes 0..255 */\nvar L_CODES       = LITERALS + 1 + LENGTH_CODES;\n/* number of Literal or Length codes, including the END_BLOCK code */\nvar D_CODES       = 30;\n/* number of distance codes */\nvar BL_CODES      = 19;\n/* number of codes used to transfer the bit lengths */\nvar HEAP_SIZE     = 2 * L_CODES + 1;\n/* maximum heap size */\nvar MAX_BITS  = 15;\n/* All codes must not exceed MAX_BITS bits */\n\nvar MIN_MATCH = 3;\nvar MAX_MATCH = 258;\nvar MIN_LOOKAHEAD = (MAX_MATCH + MIN_MATCH + 1);\n\nvar PRESET_DICT = 0x20;\n\nvar INIT_STATE = 42;\nvar EXTRA_STATE = 69;\nvar NAME_STATE = 73;\nvar COMMENT_STATE = 91;\nvar HCRC_STATE = 103;\nvar BUSY_STATE = 113;\nvar FINISH_STATE = 666;\n\nvar BS_NEED_MORE      = 1; /* block not completed, need more input or more output */\nvar BS_BLOCK_DONE     = 2; /* block flush performed */\nvar BS_FINISH_STARTED = 3; /* finish started, need only more output at next deflate */\nvar BS_FINISH_DONE    = 4; /* finish done, accept no more input or output */\n\nvar OS_CODE = 0x03; // Unix :) . Don't detect, use this default.\n\nfunction err(strm, errorCode) {\n  strm.msg = msg[errorCode];\n  return errorCode;\n}\n\nfunction rank(f) {\n  return ((f) << 1) - ((f) > 4 ? 9 : 0);\n}\n\nfunction zero(buf) { var len = buf.length; while (--len >= 0) { buf[len] = 0; } }\n\n\n/* =========================================================================\n * Flush as much pending output as possible. All deflate() output goes\n * through this function so some applications may wish to modify it\n * to avoid allocating a large strm->output buffer and copying into it.\n * (See also read_buf()).\n */\nfunction flush_pending(strm) {\n  var s = strm.state;\n\n  //_tr_flush_bits(s);\n  var len = s.pending;\n  if (len > strm.avail_out) {\n    len = strm.avail_out;\n  }\n  if (len === 0) { return; }\n\n  utils.arraySet(strm.output, s.pending_buf, s.pending_out, len, strm.next_out);\n  strm.next_out += len;\n  s.pending_out += len;\n  strm.total_out += len;\n  strm.avail_out -= len;\n  s.pending -= len;\n  if (s.pending === 0) {\n    s.pending_out = 0;\n  }\n}\n\n\nfunction flush_block_only(s, last) {\n  trees._tr_flush_block(s, (s.block_start >= 0 ? s.block_start : -1), s.strstart - s.block_start, last);\n  s.block_start = s.strstart;\n  flush_pending(s.strm);\n}\n\n\nfunction put_byte(s, b) {\n  s.pending_buf[s.pending++] = b;\n}\n\n\n/* =========================================================================\n * Put a short in the pending buffer. The 16-bit value is put in MSB order.\n * IN assertion: the stream state is correct and there is enough room in\n * pending_buf.\n */\nfunction putShortMSB(s, b) {\n//  put_byte(s, (Byte)(b >> 8));\n//  put_byte(s, (Byte)(b & 0xff));\n  s.pending_buf[s.pending++] = (b >>> 8) & 0xff;\n  s.pending_buf[s.pending++] = b & 0xff;\n}\n\n\n/* ===========================================================================\n * Read a new buffer from the current input stream, update the adler32\n * and total number of bytes read.  All deflate() input goes through\n * this function so some applications may wish to modify it to avoid\n * allocating a large strm->input buffer and copying from it.\n * (See also flush_pending()).\n */\nfunction read_buf(strm, buf, start, size) {\n  var len = strm.avail_in;\n\n  if (len > size) { len = size; }\n  if (len === 0) { return 0; }\n\n  strm.avail_in -= len;\n\n  // zmemcpy(buf, strm->next_in, len);\n  utils.arraySet(buf, strm.input, strm.next_in, len, start);\n  if (strm.state.wrap === 1) {\n    strm.adler = adler32(strm.adler, buf, len, start);\n  }\n\n  else if (strm.state.wrap === 2) {\n    strm.adler = crc32(strm.adler, buf, len, start);\n  }\n\n  strm.next_in += len;\n  strm.total_in += len;\n\n  return len;\n}\n\n\n/* ===========================================================================\n * Set match_start to the longest match starting at the given string and\n * return its length. Matches shorter or equal to prev_length are discarded,\n * in which case the result is equal to prev_length and match_start is\n * garbage.\n * IN assertions: cur_match is the head of the hash chain for the current\n *   string (strstart) and its distance is <= MAX_DIST, and prev_length >= 1\n * OUT assertion: the match length is not greater than s->lookahead.\n */\nfunction longest_match(s, cur_match) {\n  var chain_length = s.max_chain_length;      /* max hash chain length */\n  var scan = s.strstart; /* current string */\n  var match;                       /* matched string */\n  var len;                           /* length of current match */\n  var best_len = s.prev_length;              /* best match length so far */\n  var nice_match = s.nice_match;             /* stop if match long enough */\n  var limit = (s.strstart > (s.w_size - MIN_LOOKAHEAD)) ?\n      s.strstart - (s.w_size - MIN_LOOKAHEAD) : 0/*NIL*/;\n\n  var _win = s.window; // shortcut\n\n  var wmask = s.w_mask;\n  var prev  = s.prev;\n\n  /* Stop when cur_match becomes <= limit. To simplify the code,\n   * we prevent matches with the string of window index 0.\n   */\n\n  var strend = s.strstart + MAX_MATCH;\n  var scan_end1  = _win[scan + best_len - 1];\n  var scan_end   = _win[scan + best_len];\n\n  /* The code is optimized for HASH_BITS >= 8 and MAX_MATCH-2 multiple of 16.\n   * It is easy to get rid of this optimization if necessary.\n   */\n  // Assert(s->hash_bits >= 8 && MAX_MATCH == 258, \"Code too clever\");\n\n  /* Do not waste too much time if we already have a good match: */\n  if (s.prev_length >= s.good_match) {\n    chain_length >>= 2;\n  }\n  /* Do not look for matches beyond the end of the input. This is necessary\n   * to make deflate deterministic.\n   */\n  if (nice_match > s.lookahead) { nice_match = s.lookahead; }\n\n  // Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, \"need lookahead\");\n\n  do {\n    // Assert(cur_match < s->strstart, \"no future\");\n    match = cur_match;\n\n    /* Skip to next match if the match length cannot increase\n     * or if the match length is less than 2.  Note that the checks below\n     * for insufficient lookahead only occur occasionally for performance\n     * reasons.  Therefore uninitialized memory will be accessed, and\n     * conditional jumps will be made that depend on those values.\n     * However the length of the match is limited to the lookahead, so\n     * the output of deflate is not affected by the uninitialized values.\n     */\n\n    if (_win[match + best_len]     !== scan_end  ||\n        _win[match + best_len - 1] !== scan_end1 ||\n        _win[match]                !== _win[scan] ||\n        _win[++match]              !== _win[scan + 1]) {\n      continue;\n    }\n\n    /* The check at best_len-1 can be removed because it will be made\n     * again later. (This heuristic is not always a win.)\n     * It is not necessary to compare scan[2] and match[2] since they\n     * are always equal when the other bytes match, given that\n     * the hash keys are equal and that HASH_BITS >= 8.\n     */\n    scan += 2;\n    match++;\n    // Assert(*scan == *match, \"match[2]?\");\n\n    /* We check for insufficient lookahead only every 8th comparison;\n     * the 256th check will be made at strstart+258.\n     */\n    do {\n      /*jshint noempty:false*/\n    } while (_win[++scan] === _win[++match] && _win[++scan] === _win[++match] &&\n             _win[++scan] === _win[++match] && _win[++scan] === _win[++match] &&\n             _win[++scan] === _win[++match] && _win[++scan] === _win[++match] &&\n             _win[++scan] === _win[++match] && _win[++scan] === _win[++match] &&\n             scan < strend);\n\n    // Assert(scan <= s->window+(unsigned)(s->window_size-1), \"wild scan\");\n\n    len = MAX_MATCH - (strend - scan);\n    scan = strend - MAX_MATCH;\n\n    if (len > best_len) {\n      s.match_start = cur_match;\n      best_len = len;\n      if (len >= nice_match) {\n        break;\n      }\n      scan_end1  = _win[scan + best_len - 1];\n      scan_end   = _win[scan + best_len];\n    }\n  } while ((cur_match = prev[cur_match & wmask]) > limit && --chain_length !== 0);\n\n  if (best_len <= s.lookahead) {\n    return best_len;\n  }\n  return s.lookahead;\n}\n\n\n/* ===========================================================================\n * Fill the window when the lookahead becomes insufficient.\n * Updates strstart and lookahead.\n *\n * IN assertion: lookahead < MIN_LOOKAHEAD\n * OUT assertions: strstart <= window_size-MIN_LOOKAHEAD\n *    At least one byte has been read, or avail_in == 0; reads are\n *    performed for at least two bytes (required for the zip translate_eol\n *    option -- not supported here).\n */\nfunction fill_window(s) {\n  var _w_size = s.w_size;\n  var p, n, m, more, str;\n\n  //Assert(s->lookahead < MIN_LOOKAHEAD, \"already enough lookahead\");\n\n  do {\n    more = s.window_size - s.lookahead - s.strstart;\n\n    // JS ints have 32 bit, block below not needed\n    /* Deal with !@#$% 64K limit: */\n    //if (sizeof(int) <= 2) {\n    //    if (more == 0 && s->strstart == 0 && s->lookahead == 0) {\n    //        more = wsize;\n    //\n    //  } else if (more == (unsigned)(-1)) {\n    //        /* Very unlikely, but possible on 16 bit machine if\n    //         * strstart == 0 && lookahead == 1 (input done a byte at time)\n    //         */\n    //        more--;\n    //    }\n    //}\n\n\n    /* If the window is almost full and there is insufficient lookahead,\n     * move the upper half to the lower one to make room in the upper half.\n     */\n    if (s.strstart >= _w_size + (_w_size - MIN_LOOKAHEAD)) {\n\n      utils.arraySet(s.window, s.window, _w_size, _w_size, 0);\n      s.match_start -= _w_size;\n      s.strstart -= _w_size;\n      /* we now have strstart >= MAX_DIST */\n      s.block_start -= _w_size;\n\n      /* Slide the hash table (could be avoided with 32 bit values\n       at the expense of memory usage). We slide even when level == 0\n       to keep the hash table consistent if we switch back to level > 0\n       later. (Using level 0 permanently is not an optimal usage of\n       zlib, so we don't care about this pathological case.)\n       */\n\n      n = s.hash_size;\n      p = n;\n      do {\n        m = s.head[--p];\n        s.head[p] = (m >= _w_size ? m - _w_size : 0);\n      } while (--n);\n\n      n = _w_size;\n      p = n;\n      do {\n        m = s.prev[--p];\n        s.prev[p] = (m >= _w_size ? m - _w_size : 0);\n        /* If n is not on any hash chain, prev[n] is garbage but\n         * its value will never be used.\n         */\n      } while (--n);\n\n      more += _w_size;\n    }\n    if (s.strm.avail_in === 0) {\n      break;\n    }\n\n    /* If there was no sliding:\n     *    strstart <= WSIZE+MAX_DIST-1 && lookahead <= MIN_LOOKAHEAD - 1 &&\n     *    more == window_size - lookahead - strstart\n     * => more >= window_size - (MIN_LOOKAHEAD-1 + WSIZE + MAX_DIST-1)\n     * => more >= window_size - 2*WSIZE + 2\n     * In the BIG_MEM or MMAP case (not yet supported),\n     *   window_size == input_size + MIN_LOOKAHEAD  &&\n     *   strstart + s->lookahead <= input_size => more >= MIN_LOOKAHEAD.\n     * Otherwise, window_size == 2*WSIZE so more >= 2.\n     * If there was sliding, more >= WSIZE. So in all cases, more >= 2.\n     */\n    //Assert(more >= 2, \"more < 2\");\n    n = read_buf(s.strm, s.window, s.strstart + s.lookahead, more);\n    s.lookahead += n;\n\n    /* Initialize the hash value now that we have some input: */\n    if (s.lookahead + s.insert >= MIN_MATCH) {\n      str = s.strstart - s.insert;\n      s.ins_h = s.window[str];\n\n      /* UPDATE_HASH(s, s->ins_h, s->window[str + 1]); */\n      s.ins_h = ((s.ins_h << s.hash_shift) ^ s.window[str + 1]) & s.hash_mask;\n//#if MIN_MATCH != 3\n//        Call update_hash() MIN_MATCH-3 more times\n//#endif\n      while (s.insert) {\n        /* UPDATE_HASH(s, s->ins_h, s->window[str + MIN_MATCH-1]); */\n        s.ins_h = ((s.ins_h << s.hash_shift) ^ s.window[str + MIN_MATCH - 1]) & s.hash_mask;\n\n        s.prev[str & s.w_mask] = s.head[s.ins_h];\n        s.head[s.ins_h] = str;\n        str++;\n        s.insert--;\n        if (s.lookahead + s.insert < MIN_MATCH) {\n          break;\n        }\n      }\n    }\n    /* If the whole input has less than MIN_MATCH bytes, ins_h is garbage,\n     * but this is not important since only literal bytes will be emitted.\n     */\n\n  } while (s.lookahead < MIN_LOOKAHEAD && s.strm.avail_in !== 0);\n\n  /* If the WIN_INIT bytes after the end of the current data have never been\n   * written, then zero those bytes in order to avoid memory check reports of\n   * the use of uninitialized (or uninitialised as Julian writes) bytes by\n   * the longest match routines.  Update the high water mark for the next\n   * time through here.  WIN_INIT is set to MAX_MATCH since the longest match\n   * routines allow scanning to strstart + MAX_MATCH, ignoring lookahead.\n   */\n//  if (s.high_water < s.window_size) {\n//    var curr = s.strstart + s.lookahead;\n//    var init = 0;\n//\n//    if (s.high_water < curr) {\n//      /* Previous high water mark below current data -- zero WIN_INIT\n//       * bytes or up to end of window, whichever is less.\n//       */\n//      init = s.window_size - curr;\n//      if (init > WIN_INIT)\n//        init = WIN_INIT;\n//      zmemzero(s->window + curr, (unsigned)init);\n//      s->high_water = curr + init;\n//    }\n//    else if (s->high_water < (ulg)curr + WIN_INIT) {\n//      /* High water mark at or above current data, but below current data\n//       * plus WIN_INIT -- zero out to current data plus WIN_INIT, or up\n//       * to end of window, whichever is less.\n//       */\n//      init = (ulg)curr + WIN_INIT - s->high_water;\n//      if (init > s->window_size - s->high_water)\n//        init = s->window_size - s->high_water;\n//      zmemzero(s->window + s->high_water, (unsigned)init);\n//      s->high_water += init;\n//    }\n//  }\n//\n//  Assert((ulg)s->strstart <= s->window_size - MIN_LOOKAHEAD,\n//    \"not enough room for search\");\n}\n\n/* ===========================================================================\n * Copy without compression as much as possible from the input stream, return\n * the current block state.\n * This function does not insert new strings in the dictionary since\n * uncompressible data is probably not useful. This function is used\n * only for the level=0 compression option.\n * NOTE: this function should be optimized to avoid extra copying from\n * window to pending_buf.\n */\nfunction deflate_stored(s, flush) {\n  /* Stored blocks are limited to 0xffff bytes, pending_buf is limited\n   * to pending_buf_size, and each stored block has a 5 byte header:\n   */\n  var max_block_size = 0xffff;\n\n  if (max_block_size > s.pending_buf_size - 5) {\n    max_block_size = s.pending_buf_size - 5;\n  }\n\n  /* Copy as much as possible from input to output: */\n  for (;;) {\n    /* Fill the window as much as possible: */\n    if (s.lookahead <= 1) {\n\n      //Assert(s->strstart < s->w_size+MAX_DIST(s) ||\n      //  s->block_start >= (long)s->w_size, \"slide too late\");\n//      if (!(s.strstart < s.w_size + (s.w_size - MIN_LOOKAHEAD) ||\n//        s.block_start >= s.w_size)) {\n//        throw  new Error(\"slide too late\");\n//      }\n\n      fill_window(s);\n      if (s.lookahead === 0 && flush === Z_NO_FLUSH) {\n        return BS_NEED_MORE;\n      }\n\n      if (s.lookahead === 0) {\n        break;\n      }\n      /* flush the current block */\n    }\n    //Assert(s->block_start >= 0L, \"block gone\");\n//    if (s.block_start < 0) throw new Error(\"block gone\");\n\n    s.strstart += s.lookahead;\n    s.lookahead = 0;\n\n    /* Emit a stored block if pending_buf will be full: */\n    var max_start = s.block_start + max_block_size;\n\n    if (s.strstart === 0 || s.strstart >= max_start) {\n      /* strstart == 0 is possible when wraparound on 16-bit machine */\n      s.lookahead = s.strstart - max_start;\n      s.strstart = max_start;\n      /*** FLUSH_BLOCK(s, 0); ***/\n      flush_block_only(s, false);\n      if (s.strm.avail_out === 0) {\n        return BS_NEED_MORE;\n      }\n      /***/\n\n\n    }\n    /* Flush if we may have to slide, otherwise block_start may become\n     * negative and the data will be gone:\n     */\n    if (s.strstart - s.block_start >= (s.w_size - MIN_LOOKAHEAD)) {\n      /*** FLUSH_BLOCK(s, 0); ***/\n      flush_block_only(s, false);\n      if (s.strm.avail_out === 0) {\n        return BS_NEED_MORE;\n      }\n      /***/\n    }\n  }\n\n  s.insert = 0;\n\n  if (flush === Z_FINISH) {\n    /*** FLUSH_BLOCK(s, 1); ***/\n    flush_block_only(s, true);\n    if (s.strm.avail_out === 0) {\n      return BS_FINISH_STARTED;\n    }\n    /***/\n    return BS_FINISH_DONE;\n  }\n\n  if (s.strstart > s.block_start) {\n    /*** FLUSH_BLOCK(s, 0); ***/\n    flush_block_only(s, false);\n    if (s.strm.avail_out === 0) {\n      return BS_NEED_MORE;\n    }\n    /***/\n  }\n\n  return BS_NEED_MORE;\n}\n\n/* ===========================================================================\n * Compress as much as possible from the input stream, return the current\n * block state.\n * This function does not perform lazy evaluation of matches and inserts\n * new strings in the dictionary only for unmatched strings or for short\n * matches. It is used only for the fast compression options.\n */\nfunction deflate_fast(s, flush) {\n  var hash_head;        /* head of the hash chain */\n  var bflush;           /* set if current block must be flushed */\n\n  for (;;) {\n    /* Make sure that we always have enough lookahead, except\n     * at the end of the input file. We need MAX_MATCH bytes\n     * for the next match, plus MIN_MATCH bytes to insert the\n     * string following the next match.\n     */\n    if (s.lookahead < MIN_LOOKAHEAD) {\n      fill_window(s);\n      if (s.lookahead < MIN_LOOKAHEAD && flush === Z_NO_FLUSH) {\n        return BS_NEED_MORE;\n      }\n      if (s.lookahead === 0) {\n        break; /* flush the current block */\n      }\n    }\n\n    /* Insert the string window[strstart .. strstart+2] in the\n     * dictionary, and set hash_head to the head of the hash chain:\n     */\n    hash_head = 0/*NIL*/;\n    if (s.lookahead >= MIN_MATCH) {\n      /*** INSERT_STRING(s, s.strstart, hash_head); ***/\n      s.ins_h = ((s.ins_h << s.hash_shift) ^ s.window[s.strstart + MIN_MATCH - 1]) & s.hash_mask;\n      hash_head = s.prev[s.strstart & s.w_mask] = s.head[s.ins_h];\n      s.head[s.ins_h] = s.strstart;\n      /***/\n    }\n\n    /* Find the longest match, discarding those <= prev_length.\n     * At this point we have always match_length < MIN_MATCH\n     */\n    if (hash_head !== 0/*NIL*/ && ((s.strstart - hash_head) <= (s.w_size - MIN_LOOKAHEAD))) {\n      /* To simplify the code, we prevent matches with the string\n       * of window index 0 (in particular we have to avoid a match\n       * of the string with itself at the start of the input file).\n       */\n      s.match_length = longest_match(s, hash_head);\n      /* longest_match() sets match_start */\n    }\n    if (s.match_length >= MIN_MATCH) {\n      // check_match(s, s.strstart, s.match_start, s.match_length); // for debug only\n\n      /*** _tr_tally_dist(s, s.strstart - s.match_start,\n                     s.match_length - MIN_MATCH, bflush); ***/\n      bflush = trees._tr_tally(s, s.strstart - s.match_start, s.match_length - MIN_MATCH);\n\n      s.lookahead -= s.match_length;\n\n      /* Insert new strings in the hash table only if the match length\n       * is not too large. This saves time but degrades compression.\n       */\n      if (s.match_length <= s.max_lazy_match/*max_insert_length*/ && s.lookahead >= MIN_MATCH) {\n        s.match_length--; /* string at strstart already in table */\n        do {\n          s.strstart++;\n          /*** INSERT_STRING(s, s.strstart, hash_head); ***/\n          s.ins_h = ((s.ins_h << s.hash_shift) ^ s.window[s.strstart + MIN_MATCH - 1]) & s.hash_mask;\n          hash_head = s.prev[s.strstart & s.w_mask] = s.head[s.ins_h];\n          s.head[s.ins_h] = s.strstart;\n          /***/\n          /* strstart never exceeds WSIZE-MAX_MATCH, so there are\n           * always MIN_MATCH bytes ahead.\n           */\n        } while (--s.match_length !== 0);\n        s.strstart++;\n      } else\n      {\n        s.strstart += s.match_length;\n        s.match_length = 0;\n        s.ins_h = s.window[s.strstart];\n        /* UPDATE_HASH(s, s.ins_h, s.window[s.strstart+1]); */\n        s.ins_h = ((s.ins_h << s.hash_shift) ^ s.window[s.strstart + 1]) & s.hash_mask;\n\n//#if MIN_MATCH != 3\n//                Call UPDATE_HASH() MIN_MATCH-3 more times\n//#endif\n        /* If lookahead < MIN_MATCH, ins_h is garbage, but it does not\n         * matter since it will be recomputed at next deflate call.\n         */\n      }\n    } else {\n      /* No match, output a literal byte */\n      //Tracevv((stderr,\"%c\", s.window[s.strstart]));\n      /*** _tr_tally_lit(s, s.window[s.strstart], bflush); ***/\n      bflush = trees._tr_tally(s, 0, s.window[s.strstart]);\n\n      s.lookahead--;\n      s.strstart++;\n    }\n    if (bflush) {\n      /*** FLUSH_BLOCK(s, 0); ***/\n      flush_block_only(s, false);\n      if (s.strm.avail_out === 0) {\n        return BS_NEED_MORE;\n      }\n      /***/\n    }\n  }\n  s.insert = ((s.strstart < (MIN_MATCH - 1)) ? s.strstart : MIN_MATCH - 1);\n  if (flush === Z_FINISH) {\n    /*** FLUSH_BLOCK(s, 1); ***/\n    flush_block_only(s, true);\n    if (s.strm.avail_out === 0) {\n      return BS_FINISH_STARTED;\n    }\n    /***/\n    return BS_FINISH_DONE;\n  }\n  if (s.last_lit) {\n    /*** FLUSH_BLOCK(s, 0); ***/\n    flush_block_only(s, false);\n    if (s.strm.avail_out === 0) {\n      return BS_NEED_MORE;\n    }\n    /***/\n  }\n  return BS_BLOCK_DONE;\n}\n\n/* ===========================================================================\n * Same as above, but achieves better compression. We use a lazy\n * evaluation for matches: a match is finally adopted only if there is\n * no better match at the next window position.\n */\nfunction deflate_slow(s, flush) {\n  var hash_head;          /* head of hash chain */\n  var bflush;              /* set if current block must be flushed */\n\n  var max_insert;\n\n  /* Process the input block. */\n  for (;;) {\n    /* Make sure that we always have enough lookahead, except\n     * at the end of the input file. We need MAX_MATCH bytes\n     * for the next match, plus MIN_MATCH bytes to insert the\n     * string following the next match.\n     */\n    if (s.lookahead < MIN_LOOKAHEAD) {\n      fill_window(s);\n      if (s.lookahead < MIN_LOOKAHEAD && flush === Z_NO_FLUSH) {\n        return BS_NEED_MORE;\n      }\n      if (s.lookahead === 0) { break; } /* flush the current block */\n    }\n\n    /* Insert the string window[strstart .. strstart+2] in the\n     * dictionary, and set hash_head to the head of the hash chain:\n     */\n    hash_head = 0/*NIL*/;\n    if (s.lookahead >= MIN_MATCH) {\n      /*** INSERT_STRING(s, s.strstart, hash_head); ***/\n      s.ins_h = ((s.ins_h << s.hash_shift) ^ s.window[s.strstart + MIN_MATCH - 1]) & s.hash_mask;\n      hash_head = s.prev[s.strstart & s.w_mask] = s.head[s.ins_h];\n      s.head[s.ins_h] = s.strstart;\n      /***/\n    }\n\n    /* Find the longest match, discarding those <= prev_length.\n     */\n    s.prev_length = s.match_length;\n    s.prev_match = s.match_start;\n    s.match_length = MIN_MATCH - 1;\n\n    if (hash_head !== 0/*NIL*/ && s.prev_length < s.max_lazy_match &&\n        s.strstart - hash_head <= (s.w_size - MIN_LOOKAHEAD)/*MAX_DIST(s)*/) {\n      /* To simplify the code, we prevent matches with the string\n       * of window index 0 (in particular we have to avoid a match\n       * of the string with itself at the start of the input file).\n       */\n      s.match_length = longest_match(s, hash_head);\n      /* longest_match() sets match_start */\n\n      if (s.match_length <= 5 &&\n         (s.strategy === Z_FILTERED || (s.match_length === MIN_MATCH && s.strstart - s.match_start > 4096/*TOO_FAR*/))) {\n\n        /* If prev_match is also MIN_MATCH, match_start is garbage\n         * but we will ignore the current match anyway.\n         */\n        s.match_length = MIN_MATCH - 1;\n      }\n    }\n    /* If there was a match at the previous step and the current\n     * match is not better, output the previous match:\n     */\n    if (s.prev_length >= MIN_MATCH && s.match_length <= s.prev_length) {\n      max_insert = s.strstart + s.lookahead - MIN_MATCH;\n      /* Do not insert strings in hash table beyond this. */\n\n      //check_match(s, s.strstart-1, s.prev_match, s.prev_length);\n\n      /***_tr_tally_dist(s, s.strstart - 1 - s.prev_match,\n                     s.prev_length - MIN_MATCH, bflush);***/\n      bflush = trees._tr_tally(s, s.strstart - 1 - s.prev_match, s.prev_length - MIN_MATCH);\n      /* Insert in hash table all strings up to the end of the match.\n       * strstart-1 and strstart are already inserted. If there is not\n       * enough lookahead, the last two strings are not inserted in\n       * the hash table.\n       */\n      s.lookahead -= s.prev_length - 1;\n      s.prev_length -= 2;\n      do {\n        if (++s.strstart <= max_insert) {\n          /*** INSERT_STRING(s, s.strstart, hash_head); ***/\n          s.ins_h = ((s.ins_h << s.hash_shift) ^ s.window[s.strstart + MIN_MATCH - 1]) & s.hash_mask;\n          hash_head = s.prev[s.strstart & s.w_mask] = s.head[s.ins_h];\n          s.head[s.ins_h] = s.strstart;\n          /***/\n        }\n      } while (--s.prev_length !== 0);\n      s.match_available = 0;\n      s.match_length = MIN_MATCH - 1;\n      s.strstart++;\n\n      if (bflush) {\n        /*** FLUSH_BLOCK(s, 0); ***/\n        flush_block_only(s, false);\n        if (s.strm.avail_out === 0) {\n          return BS_NEED_MORE;\n        }\n        /***/\n      }\n\n    } else if (s.match_available) {\n      /* If there was no match at the previous position, output a\n       * single literal. If there was a match but the current match\n       * is longer, truncate the previous match to a single literal.\n       */\n      //Tracevv((stderr,\"%c\", s->window[s->strstart-1]));\n      /*** _tr_tally_lit(s, s.window[s.strstart-1], bflush); ***/\n      bflush = trees._tr_tally(s, 0, s.window[s.strstart - 1]);\n\n      if (bflush) {\n        /*** FLUSH_BLOCK_ONLY(s, 0) ***/\n        flush_block_only(s, false);\n        /***/\n      }\n      s.strstart++;\n      s.lookahead--;\n      if (s.strm.avail_out === 0) {\n        return BS_NEED_MORE;\n      }\n    } else {\n      /* There is no previous match to compare with, wait for\n       * the next step to decide.\n       */\n      s.match_available = 1;\n      s.strstart++;\n      s.lookahead--;\n    }\n  }\n  //Assert (flush != Z_NO_FLUSH, \"no flush?\");\n  if (s.match_available) {\n    //Tracevv((stderr,\"%c\", s->window[s->strstart-1]));\n    /*** _tr_tally_lit(s, s.window[s.strstart-1], bflush); ***/\n    bflush = trees._tr_tally(s, 0, s.window[s.strstart - 1]);\n\n    s.match_available = 0;\n  }\n  s.insert = s.strstart < MIN_MATCH - 1 ? s.strstart : MIN_MATCH - 1;\n  if (flush === Z_FINISH) {\n    /*** FLUSH_BLOCK(s, 1); ***/\n    flush_block_only(s, true);\n    if (s.strm.avail_out === 0) {\n      return BS_FINISH_STARTED;\n    }\n    /***/\n    return BS_FINISH_DONE;\n  }\n  if (s.last_lit) {\n    /*** FLUSH_BLOCK(s, 0); ***/\n    flush_block_only(s, false);\n    if (s.strm.avail_out === 0) {\n      return BS_NEED_MORE;\n    }\n    /***/\n  }\n\n  return BS_BLOCK_DONE;\n}\n\n\n/* ===========================================================================\n * For Z_RLE, simply look for runs of bytes, generate matches only of distance\n * one.  Do not maintain a hash table.  (It will be regenerated if this run of\n * deflate switches away from Z_RLE.)\n */\nfunction deflate_rle(s, flush) {\n  var bflush;            /* set if current block must be flushed */\n  var prev;              /* byte at distance one to match */\n  var scan, strend;      /* scan goes up to strend for length of run */\n\n  var _win = s.window;\n\n  for (;;) {\n    /* Make sure that we always have enough lookahead, except\n     * at the end of the input file. We need MAX_MATCH bytes\n     * for the longest run, plus one for the unrolled loop.\n     */\n    if (s.lookahead <= MAX_MATCH) {\n      fill_window(s);\n      if (s.lookahead <= MAX_MATCH && flush === Z_NO_FLUSH) {\n        return BS_NEED_MORE;\n      }\n      if (s.lookahead === 0) { break; } /* flush the current block */\n    }\n\n    /* See how many times the previous byte repeats */\n    s.match_length = 0;\n    if (s.lookahead >= MIN_MATCH && s.strstart > 0) {\n      scan = s.strstart - 1;\n      prev = _win[scan];\n      if (prev === _win[++scan] && prev === _win[++scan] && prev === _win[++scan]) {\n        strend = s.strstart + MAX_MATCH;\n        do {\n          /*jshint noempty:false*/\n        } while (prev === _win[++scan] && prev === _win[++scan] &&\n                 prev === _win[++scan] && prev === _win[++scan] &&\n                 prev === _win[++scan] && prev === _win[++scan] &&\n                 prev === _win[++scan] && prev === _win[++scan] &&\n                 scan < strend);\n        s.match_length = MAX_MATCH - (strend - scan);\n        if (s.match_length > s.lookahead) {\n          s.match_length = s.lookahead;\n        }\n      }\n      //Assert(scan <= s->window+(uInt)(s->window_size-1), \"wild scan\");\n    }\n\n    /* Emit match if have run of MIN_MATCH or longer, else emit literal */\n    if (s.match_length >= MIN_MATCH) {\n      //check_match(s, s.strstart, s.strstart - 1, s.match_length);\n\n      /*** _tr_tally_dist(s, 1, s.match_length - MIN_MATCH, bflush); ***/\n      bflush = trees._tr_tally(s, 1, s.match_length - MIN_MATCH);\n\n      s.lookahead -= s.match_length;\n      s.strstart += s.match_length;\n      s.match_length = 0;\n    } else {\n      /* No match, output a literal byte */\n      //Tracevv((stderr,\"%c\", s->window[s->strstart]));\n      /*** _tr_tally_lit(s, s.window[s.strstart], bflush); ***/\n      bflush = trees._tr_tally(s, 0, s.window[s.strstart]);\n\n      s.lookahead--;\n      s.strstart++;\n    }\n    if (bflush) {\n      /*** FLUSH_BLOCK(s, 0); ***/\n      flush_block_only(s, false);\n      if (s.strm.avail_out === 0) {\n        return BS_NEED_MORE;\n      }\n      /***/\n    }\n  }\n  s.insert = 0;\n  if (flush === Z_FINISH) {\n    /*** FLUSH_BLOCK(s, 1); ***/\n    flush_block_only(s, true);\n    if (s.strm.avail_out === 0) {\n      return BS_FINISH_STARTED;\n    }\n    /***/\n    return BS_FINISH_DONE;\n  }\n  if (s.last_lit) {\n    /*** FLUSH_BLOCK(s, 0); ***/\n    flush_block_only(s, false);\n    if (s.strm.avail_out === 0) {\n      return BS_NEED_MORE;\n    }\n    /***/\n  }\n  return BS_BLOCK_DONE;\n}\n\n/* ===========================================================================\n * For Z_HUFFMAN_ONLY, do not look for matches.  Do not maintain a hash table.\n * (It will be regenerated if this run of deflate switches away from Huffman.)\n */\nfunction deflate_huff(s, flush) {\n  var bflush;             /* set if current block must be flushed */\n\n  for (;;) {\n    /* Make sure that we have a literal to write. */\n    if (s.lookahead === 0) {\n      fill_window(s);\n      if (s.lookahead === 0) {\n        if (flush === Z_NO_FLUSH) {\n          return BS_NEED_MORE;\n        }\n        break;      /* flush the current block */\n      }\n    }\n\n    /* Output a literal byte */\n    s.match_length = 0;\n    //Tracevv((stderr,\"%c\", s->window[s->strstart]));\n    /*** _tr_tally_lit(s, s.window[s.strstart], bflush); ***/\n    bflush = trees._tr_tally(s, 0, s.window[s.strstart]);\n    s.lookahead--;\n    s.strstart++;\n    if (bflush) {\n      /*** FLUSH_BLOCK(s, 0); ***/\n      flush_block_only(s, false);\n      if (s.strm.avail_out === 0) {\n        return BS_NEED_MORE;\n      }\n      /***/\n    }\n  }\n  s.insert = 0;\n  if (flush === Z_FINISH) {\n    /*** FLUSH_BLOCK(s, 1); ***/\n    flush_block_only(s, true);\n    if (s.strm.avail_out === 0) {\n      return BS_FINISH_STARTED;\n    }\n    /***/\n    return BS_FINISH_DONE;\n  }\n  if (s.last_lit) {\n    /*** FLUSH_BLOCK(s, 0); ***/\n    flush_block_only(s, false);\n    if (s.strm.avail_out === 0) {\n      return BS_NEED_MORE;\n    }\n    /***/\n  }\n  return BS_BLOCK_DONE;\n}\n\n/* Values for max_lazy_match, good_match and max_chain_length, depending on\n * the desired pack level (0..9). The values given below have been tuned to\n * exclude worst case performance for pathological files. Better values may be\n * found for specific files.\n */\nfunction Config(good_length, max_lazy, nice_length, max_chain, func) {\n  this.good_length = good_length;\n  this.max_lazy = max_lazy;\n  this.nice_length = nice_length;\n  this.max_chain = max_chain;\n  this.func = func;\n}\n\nvar configuration_table;\n\nconfiguration_table = [\n  /*      good lazy nice chain */\n  new Config(0, 0, 0, 0, deflate_stored),          /* 0 store only */\n  new Config(4, 4, 8, 4, deflate_fast),            /* 1 max speed, no lazy matches */\n  new Config(4, 5, 16, 8, deflate_fast),           /* 2 */\n  new Config(4, 6, 32, 32, deflate_fast),          /* 3 */\n\n  new Config(4, 4, 16, 16, deflate_slow),          /* 4 lazy matches */\n  new Config(8, 16, 32, 32, deflate_slow),         /* 5 */\n  new Config(8, 16, 128, 128, deflate_slow),       /* 6 */\n  new Config(8, 32, 128, 256, deflate_slow),       /* 7 */\n  new Config(32, 128, 258, 1024, deflate_slow),    /* 8 */\n  new Config(32, 258, 258, 4096, deflate_slow)     /* 9 max compression */\n];\n\n\n/* ===========================================================================\n * Initialize the \"longest match\" routines for a new zlib stream\n */\nfunction lm_init(s) {\n  s.window_size = 2 * s.w_size;\n\n  /*** CLEAR_HASH(s); ***/\n  zero(s.head); // Fill with NIL (= 0);\n\n  /* Set the default configuration parameters:\n   */\n  s.max_lazy_match = configuration_table[s.level].max_lazy;\n  s.good_match = configuration_table[s.level].good_length;\n  s.nice_match = configuration_table[s.level].nice_length;\n  s.max_chain_length = configuration_table[s.level].max_chain;\n\n  s.strstart = 0;\n  s.block_start = 0;\n  s.lookahead = 0;\n  s.insert = 0;\n  s.match_length = s.prev_length = MIN_MATCH - 1;\n  s.match_available = 0;\n  s.ins_h = 0;\n}\n\n\nfunction DeflateState() {\n  this.strm = null;            /* pointer back to this zlib stream */\n  this.status = 0;            /* as the name implies */\n  this.pending_buf = null;      /* output still pending */\n  this.pending_buf_size = 0;  /* size of pending_buf */\n  this.pending_out = 0;       /* next pending byte to output to the stream */\n  this.pending = 0;           /* nb of bytes in the pending buffer */\n  this.wrap = 0;              /* bit 0 true for zlib, bit 1 true for gzip */\n  this.gzhead = null;         /* gzip header information to write */\n  this.gzindex = 0;           /* where in extra, name, or comment */\n  this.method = Z_DEFLATED; /* can only be DEFLATED */\n  this.last_flush = -1;   /* value of flush param for previous deflate call */\n\n  this.w_size = 0;  /* LZ77 window size (32K by default) */\n  this.w_bits = 0;  /* log2(w_size)  (8..16) */\n  this.w_mask = 0;  /* w_size - 1 */\n\n  this.window = null;\n  /* Sliding window. Input bytes are read into the second half of the window,\n   * and move to the first half later to keep a dictionary of at least wSize\n   * bytes. With this organization, matches are limited to a distance of\n   * wSize-MAX_MATCH bytes, but this ensures that IO is always\n   * performed with a length multiple of the block size.\n   */\n\n  this.window_size = 0;\n  /* Actual size of window: 2*wSize, except when the user input buffer\n   * is directly used as sliding window.\n   */\n\n  this.prev = null;\n  /* Link to older string with same hash index. To limit the size of this\n   * array to 64K, this link is maintained only for the last 32K strings.\n   * An index in this array is thus a window index modulo 32K.\n   */\n\n  this.head = null;   /* Heads of the hash chains or NIL. */\n\n  this.ins_h = 0;       /* hash index of string to be inserted */\n  this.hash_size = 0;   /* number of elements in hash table */\n  this.hash_bits = 0;   /* log2(hash_size) */\n  this.hash_mask = 0;   /* hash_size-1 */\n\n  this.hash_shift = 0;\n  /* Number of bits by which ins_h must be shifted at each input\n   * step. It must be such that after MIN_MATCH steps, the oldest\n   * byte no longer takes part in the hash key, that is:\n   *   hash_shift * MIN_MATCH >= hash_bits\n   */\n\n  this.block_start = 0;\n  /* Window position at the beginning of the current output block. Gets\n   * negative when the window is moved backwards.\n   */\n\n  this.match_length = 0;      /* length of best match */\n  this.prev_match = 0;        /* previous match */\n  this.match_available = 0;   /* set if previous match exists */\n  this.strstart = 0;          /* start of string to insert */\n  this.match_start = 0;       /* start of matching string */\n  this.lookahead = 0;         /* number of valid bytes ahead in window */\n\n  this.prev_length = 0;\n  /* Length of the best match at previous step. Matches not greater than this\n   * are discarded. This is used in the lazy match evaluation.\n   */\n\n  this.max_chain_length = 0;\n  /* To speed up deflation, hash chains are never searched beyond this\n   * length.  A higher limit improves compression ratio but degrades the\n   * speed.\n   */\n\n  this.max_lazy_match = 0;\n  /* Attempt to find a better match only when the current match is strictly\n   * smaller than this value. This mechanism is used only for compression\n   * levels >= 4.\n   */\n  // That's alias to max_lazy_match, don't use directly\n  //this.max_insert_length = 0;\n  /* Insert new strings in the hash table only if the match length is not\n   * greater than this length. This saves time but degrades compression.\n   * max_insert_length is used only for compression levels <= 3.\n   */\n\n  this.level = 0;     /* compression level (1..9) */\n  this.strategy = 0;  /* favor or force Huffman coding*/\n\n  this.good_match = 0;\n  /* Use a faster search when the previous match is longer than this */\n\n  this.nice_match = 0; /* Stop searching when current match exceeds this */\n\n              /* used by trees.c: */\n\n  /* Didn't use ct_data typedef below to suppress compiler warning */\n\n  // struct ct_data_s dyn_ltree[HEAP_SIZE];   /* literal and length tree */\n  // struct ct_data_s dyn_dtree[2*D_CODES+1]; /* distance tree */\n  // struct ct_data_s bl_tree[2*BL_CODES+1];  /* Huffman tree for bit lengths */\n\n  // Use flat array of DOUBLE size, with interleaved fata,\n  // because JS does not support effective\n  this.dyn_ltree  = new utils.Buf16(HEAP_SIZE * 2);\n  this.dyn_dtree  = new utils.Buf16((2 * D_CODES + 1) * 2);\n  this.bl_tree    = new utils.Buf16((2 * BL_CODES + 1) * 2);\n  zero(this.dyn_ltree);\n  zero(this.dyn_dtree);\n  zero(this.bl_tree);\n\n  this.l_desc   = null;         /* desc. for literal tree */\n  this.d_desc   = null;         /* desc. for distance tree */\n  this.bl_desc  = null;         /* desc. for bit length tree */\n\n  //ush bl_count[MAX_BITS+1];\n  this.bl_count = new utils.Buf16(MAX_BITS + 1);\n  /* number of codes at each bit length for an optimal tree */\n\n  //int heap[2*L_CODES+1];      /* heap used to build the Huffman trees */\n  this.heap = new utils.Buf16(2 * L_CODES + 1);  /* heap used to build the Huffman trees */\n  zero(this.heap);\n\n  this.heap_len = 0;               /* number of elements in the heap */\n  this.heap_max = 0;               /* element of largest frequency */\n  /* The sons of heap[n] are heap[2*n] and heap[2*n+1]. heap[0] is not used.\n   * The same heap array is used to build all trees.\n   */\n\n  this.depth = new utils.Buf16(2 * L_CODES + 1); //uch depth[2*L_CODES+1];\n  zero(this.depth);\n  /* Depth of each subtree used as tie breaker for trees of equal frequency\n   */\n\n  this.l_buf = 0;          /* buffer index for literals or lengths */\n\n  this.lit_bufsize = 0;\n  /* Size of match buffer for literals/lengths.  There are 4 reasons for\n   * limiting lit_bufsize to 64K:\n   *   - frequencies can be kept in 16 bit counters\n   *   - if compression is not successful for the first block, all input\n   *     data is still in the window so we can still emit a stored block even\n   *     when input comes from standard input.  (This can also be done for\n   *     all blocks if lit_bufsize is not greater than 32K.)\n   *   - if compression is not successful for a file smaller than 64K, we can\n   *     even emit a stored file instead of a stored block (saving 5 bytes).\n   *     This is applicable only for zip (not gzip or zlib).\n   *   - creating new Huffman trees less frequently may not provide fast\n   *     adaptation to changes in the input data statistics. (Take for\n   *     example a binary file with poorly compressible code followed by\n   *     a highly compressible string table.) Smaller buffer sizes give\n   *     fast adaptation but have of course the overhead of transmitting\n   *     trees more frequently.\n   *   - I can't count above 4\n   */\n\n  this.last_lit = 0;      /* running index in l_buf */\n\n  this.d_buf = 0;\n  /* Buffer index for distances. To simplify the code, d_buf and l_buf have\n   * the same number of elements. To use different lengths, an extra flag\n   * array would be necessary.\n   */\n\n  this.opt_len = 0;       /* bit length of current block with optimal trees */\n  this.static_len = 0;    /* bit length of current block with static trees */\n  this.matches = 0;       /* number of string matches in current block */\n  this.insert = 0;        /* bytes at end of window left to insert */\n\n\n  this.bi_buf = 0;\n  /* Output buffer. bits are inserted starting at the bottom (least\n   * significant bits).\n   */\n  this.bi_valid = 0;\n  /* Number of valid bits in bi_buf.  All bits above the last valid bit\n   * are always zero.\n   */\n\n  // Used for window memory init. We safely ignore it for JS. That makes\n  // sense only for pointers and memory check tools.\n  //this.high_water = 0;\n  /* High water mark offset in window for initialized bytes -- bytes above\n   * this are set to zero in order to avoid memory check warnings when\n   * longest match routines access bytes past the input.  This is then\n   * updated to the new high water mark.\n   */\n}\n\n\nfunction deflateResetKeep(strm) {\n  var s;\n\n  if (!strm || !strm.state) {\n    return err(strm, Z_STREAM_ERROR);\n  }\n\n  strm.total_in = strm.total_out = 0;\n  strm.data_type = Z_UNKNOWN;\n\n  s = strm.state;\n  s.pending = 0;\n  s.pending_out = 0;\n\n  if (s.wrap < 0) {\n    s.wrap = -s.wrap;\n    /* was made negative by deflate(..., Z_FINISH); */\n  }\n  s.status = (s.wrap ? INIT_STATE : BUSY_STATE);\n  strm.adler = (s.wrap === 2) ?\n    0  // crc32(0, Z_NULL, 0)\n  :\n    1; // adler32(0, Z_NULL, 0)\n  s.last_flush = Z_NO_FLUSH;\n  trees._tr_init(s);\n  return Z_OK;\n}\n\n\nfunction deflateReset(strm) {\n  var ret = deflateResetKeep(strm);\n  if (ret === Z_OK) {\n    lm_init(strm.state);\n  }\n  return ret;\n}\n\n\nfunction deflateSetHeader(strm, head) {\n  if (!strm || !strm.state) { return Z_STREAM_ERROR; }\n  if (strm.state.wrap !== 2) { return Z_STREAM_ERROR; }\n  strm.state.gzhead = head;\n  return Z_OK;\n}\n\n\nfunction deflateInit2(strm, level, method, windowBits, memLevel, strategy) {\n  if (!strm) { // === Z_NULL\n    return Z_STREAM_ERROR;\n  }\n  var wrap = 1;\n\n  if (level === Z_DEFAULT_COMPRESSION) {\n    level = 6;\n  }\n\n  if (windowBits < 0) { /* suppress zlib wrapper */\n    wrap = 0;\n    windowBits = -windowBits;\n  }\n\n  else if (windowBits > 15) {\n    wrap = 2;           /* write gzip wrapper instead */\n    windowBits -= 16;\n  }\n\n\n  if (memLevel < 1 || memLevel > MAX_MEM_LEVEL || method !== Z_DEFLATED ||\n    windowBits < 8 || windowBits > 15 || level < 0 || level > 9 ||\n    strategy < 0 || strategy > Z_FIXED) {\n    return err(strm, Z_STREAM_ERROR);\n  }\n\n\n  if (windowBits === 8) {\n    windowBits = 9;\n  }\n  /* until 256-byte window bug fixed */\n\n  var s = new DeflateState();\n\n  strm.state = s;\n  s.strm = strm;\n\n  s.wrap = wrap;\n  s.gzhead = null;\n  s.w_bits = windowBits;\n  s.w_size = 1 << s.w_bits;\n  s.w_mask = s.w_size - 1;\n\n  s.hash_bits = memLevel + 7;\n  s.hash_size = 1 << s.hash_bits;\n  s.hash_mask = s.hash_size - 1;\n  s.hash_shift = ~~((s.hash_bits + MIN_MATCH - 1) / MIN_MATCH);\n\n  s.window = new utils.Buf8(s.w_size * 2);\n  s.head = new utils.Buf16(s.hash_size);\n  s.prev = new utils.Buf16(s.w_size);\n\n  // Don't need mem init magic for JS.\n  //s.high_water = 0;  /* nothing written to s->window yet */\n\n  s.lit_bufsize = 1 << (memLevel + 6); /* 16K elements by default */\n\n  s.pending_buf_size = s.lit_bufsize * 4;\n\n  //overlay = (ushf *) ZALLOC(strm, s->lit_bufsize, sizeof(ush)+2);\n  //s->pending_buf = (uchf *) overlay;\n  s.pending_buf = new utils.Buf8(s.pending_buf_size);\n\n  // It is offset from `s.pending_buf` (size is `s.lit_bufsize * 2`)\n  //s->d_buf = overlay + s->lit_bufsize/sizeof(ush);\n  s.d_buf = 1 * s.lit_bufsize;\n\n  //s->l_buf = s->pending_buf + (1+sizeof(ush))*s->lit_bufsize;\n  s.l_buf = (1 + 2) * s.lit_bufsize;\n\n  s.level = level;\n  s.strategy = strategy;\n  s.method = method;\n\n  return deflateReset(strm);\n}\n\nfunction deflateInit(strm, level) {\n  return deflateInit2(strm, level, Z_DEFLATED, MAX_WBITS, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY);\n}\n\n\nfunction deflate(strm, flush) {\n  var old_flush, s;\n  var beg, val; // for gzip header write only\n\n  if (!strm || !strm.state ||\n    flush > Z_BLOCK || flush < 0) {\n    return strm ? err(strm, Z_STREAM_ERROR) : Z_STREAM_ERROR;\n  }\n\n  s = strm.state;\n\n  if (!strm.output ||\n      (!strm.input && strm.avail_in !== 0) ||\n      (s.status === FINISH_STATE && flush !== Z_FINISH)) {\n    return err(strm, (strm.avail_out === 0) ? Z_BUF_ERROR : Z_STREAM_ERROR);\n  }\n\n  s.strm = strm; /* just in case */\n  old_flush = s.last_flush;\n  s.last_flush = flush;\n\n  /* Write the header */\n  if (s.status === INIT_STATE) {\n\n    if (s.wrap === 2) { // GZIP header\n      strm.adler = 0;  //crc32(0L, Z_NULL, 0);\n      put_byte(s, 31);\n      put_byte(s, 139);\n      put_byte(s, 8);\n      if (!s.gzhead) { // s->gzhead == Z_NULL\n        put_byte(s, 0);\n        put_byte(s, 0);\n        put_byte(s, 0);\n        put_byte(s, 0);\n        put_byte(s, 0);\n        put_byte(s, s.level === 9 ? 2 :\n                    (s.strategy >= Z_HUFFMAN_ONLY || s.level < 2 ?\n                     4 : 0));\n        put_byte(s, OS_CODE);\n        s.status = BUSY_STATE;\n      }\n      else {\n        put_byte(s, (s.gzhead.text ? 1 : 0) +\n                    (s.gzhead.hcrc ? 2 : 0) +\n                    (!s.gzhead.extra ? 0 : 4) +\n                    (!s.gzhead.name ? 0 : 8) +\n                    (!s.gzhead.comment ? 0 : 16)\n        );\n        put_byte(s, s.gzhead.time & 0xff);\n        put_byte(s, (s.gzhead.time >> 8) & 0xff);\n        put_byte(s, (s.gzhead.time >> 16) & 0xff);\n        put_byte(s, (s.gzhead.time >> 24) & 0xff);\n        put_byte(s, s.level === 9 ? 2 :\n                    (s.strategy >= Z_HUFFMAN_ONLY || s.level < 2 ?\n                     4 : 0));\n        put_byte(s, s.gzhead.os & 0xff);\n        if (s.gzhead.extra && s.gzhead.extra.length) {\n          put_byte(s, s.gzhead.extra.length & 0xff);\n          put_byte(s, (s.gzhead.extra.length >> 8) & 0xff);\n        }\n        if (s.gzhead.hcrc) {\n          strm.adler = crc32(strm.adler, s.pending_buf, s.pending, 0);\n        }\n        s.gzindex = 0;\n        s.status = EXTRA_STATE;\n      }\n    }\n    else // DEFLATE header\n    {\n      var header = (Z_DEFLATED + ((s.w_bits - 8) << 4)) << 8;\n      var level_flags = -1;\n\n      if (s.strategy >= Z_HUFFMAN_ONLY || s.level < 2) {\n        level_flags = 0;\n      } else if (s.level < 6) {\n        level_flags = 1;\n      } else if (s.level === 6) {\n        level_flags = 2;\n      } else {\n        level_flags = 3;\n      }\n      header |= (level_flags << 6);\n      if (s.strstart !== 0) { header |= PRESET_DICT; }\n      header += 31 - (header % 31);\n\n      s.status = BUSY_STATE;\n      putShortMSB(s, header);\n\n      /* Save the adler32 of the preset dictionary: */\n      if (s.strstart !== 0) {\n        putShortMSB(s, strm.adler >>> 16);\n        putShortMSB(s, strm.adler & 0xffff);\n      }\n      strm.adler = 1; // adler32(0L, Z_NULL, 0);\n    }\n  }\n\n//#ifdef GZIP\n  if (s.status === EXTRA_STATE) {\n    if (s.gzhead.extra/* != Z_NULL*/) {\n      beg = s.pending;  /* start of bytes to update crc */\n\n      while (s.gzindex < (s.gzhead.extra.length & 0xffff)) {\n        if (s.pending === s.pending_buf_size) {\n          if (s.gzhead.hcrc && s.pending > beg) {\n            strm.adler = crc32(strm.adler, s.pending_buf, s.pending - beg, beg);\n          }\n          flush_pending(strm);\n          beg = s.pending;\n          if (s.pending === s.pending_buf_size) {\n            break;\n          }\n        }\n        put_byte(s, s.gzhead.extra[s.gzindex] & 0xff);\n        s.gzindex++;\n      }\n      if (s.gzhead.hcrc && s.pending > beg) {\n        strm.adler = crc32(strm.adler, s.pending_buf, s.pending - beg, beg);\n      }\n      if (s.gzindex === s.gzhead.extra.length) {\n        s.gzindex = 0;\n        s.status = NAME_STATE;\n      }\n    }\n    else {\n      s.status = NAME_STATE;\n    }\n  }\n  if (s.status === NAME_STATE) {\n    if (s.gzhead.name/* != Z_NULL*/) {\n      beg = s.pending;  /* start of bytes to update crc */\n      //int val;\n\n      do {\n        if (s.pending === s.pending_buf_size) {\n          if (s.gzhead.hcrc && s.pending > beg) {\n            strm.adler = crc32(strm.adler, s.pending_buf, s.pending - beg, beg);\n          }\n          flush_pending(strm);\n          beg = s.pending;\n          if (s.pending === s.pending_buf_size) {\n            val = 1;\n            break;\n          }\n        }\n        // JS specific: little magic to add zero terminator to end of string\n        if (s.gzindex < s.gzhead.name.length) {\n          val = s.gzhead.name.charCodeAt(s.gzindex++) & 0xff;\n        } else {\n          val = 0;\n        }\n        put_byte(s, val);\n      } while (val !== 0);\n\n      if (s.gzhead.hcrc && s.pending > beg) {\n        strm.adler = crc32(strm.adler, s.pending_buf, s.pending - beg, beg);\n      }\n      if (val === 0) {\n        s.gzindex = 0;\n        s.status = COMMENT_STATE;\n      }\n    }\n    else {\n      s.status = COMMENT_STATE;\n    }\n  }\n  if (s.status === COMMENT_STATE) {\n    if (s.gzhead.comment/* != Z_NULL*/) {\n      beg = s.pending;  /* start of bytes to update crc */\n      //int val;\n\n      do {\n        if (s.pending === s.pending_buf_size) {\n          if (s.gzhead.hcrc && s.pending > beg) {\n            strm.adler = crc32(strm.adler, s.pending_buf, s.pending - beg, beg);\n          }\n          flush_pending(strm);\n          beg = s.pending;\n          if (s.pending === s.pending_buf_size) {\n            val = 1;\n            break;\n          }\n        }\n        // JS specific: little magic to add zero terminator to end of string\n        if (s.gzindex < s.gzhead.comment.length) {\n          val = s.gzhead.comment.charCodeAt(s.gzindex++) & 0xff;\n        } else {\n          val = 0;\n        }\n        put_byte(s, val);\n      } while (val !== 0);\n\n      if (s.gzhead.hcrc && s.pending > beg) {\n        strm.adler = crc32(strm.adler, s.pending_buf, s.pending - beg, beg);\n      }\n      if (val === 0) {\n        s.status = HCRC_STATE;\n      }\n    }\n    else {\n      s.status = HCRC_STATE;\n    }\n  }\n  if (s.status === HCRC_STATE) {\n    if (s.gzhead.hcrc) {\n      if (s.pending + 2 > s.pending_buf_size) {\n        flush_pending(strm);\n      }\n      if (s.pending + 2 <= s.pending_buf_size) {\n        put_byte(s, strm.adler & 0xff);\n        put_byte(s, (strm.adler >> 8) & 0xff);\n        strm.adler = 0; //crc32(0L, Z_NULL, 0);\n        s.status = BUSY_STATE;\n      }\n    }\n    else {\n      s.status = BUSY_STATE;\n    }\n  }\n//#endif\n\n  /* Flush as much pending output as possible */\n  if (s.pending !== 0) {\n    flush_pending(strm);\n    if (strm.avail_out === 0) {\n      /* Since avail_out is 0, deflate will be called again with\n       * more output space, but possibly with both pending and\n       * avail_in equal to zero. There won't be anything to do,\n       * but this is not an error situation so make sure we\n       * return OK instead of BUF_ERROR at next call of deflate:\n       */\n      s.last_flush = -1;\n      return Z_OK;\n    }\n\n    /* Make sure there is something to do and avoid duplicate consecutive\n     * flushes. For repeated and useless calls with Z_FINISH, we keep\n     * returning Z_STREAM_END instead of Z_BUF_ERROR.\n     */\n  } else if (strm.avail_in === 0 && rank(flush) <= rank(old_flush) &&\n    flush !== Z_FINISH) {\n    return err(strm, Z_BUF_ERROR);\n  }\n\n  /* User must not provide more input after the first FINISH: */\n  if (s.status === FINISH_STATE && strm.avail_in !== 0) {\n    return err(strm, Z_BUF_ERROR);\n  }\n\n  /* Start a new block or continue the current one.\n   */\n  if (strm.avail_in !== 0 || s.lookahead !== 0 ||\n    (flush !== Z_NO_FLUSH && s.status !== FINISH_STATE)) {\n    var bstate = (s.strategy === Z_HUFFMAN_ONLY) ? deflate_huff(s, flush) :\n      (s.strategy === Z_RLE ? deflate_rle(s, flush) :\n        configuration_table[s.level].func(s, flush));\n\n    if (bstate === BS_FINISH_STARTED || bstate === BS_FINISH_DONE) {\n      s.status = FINISH_STATE;\n    }\n    if (bstate === BS_NEED_MORE || bstate === BS_FINISH_STARTED) {\n      if (strm.avail_out === 0) {\n        s.last_flush = -1;\n        /* avoid BUF_ERROR next call, see above */\n      }\n      return Z_OK;\n      /* If flush != Z_NO_FLUSH && avail_out == 0, the next call\n       * of deflate should use the same flush parameter to make sure\n       * that the flush is complete. So we don't have to output an\n       * empty block here, this will be done at next call. This also\n       * ensures that for a very small output buffer, we emit at most\n       * one empty block.\n       */\n    }\n    if (bstate === BS_BLOCK_DONE) {\n      if (flush === Z_PARTIAL_FLUSH) {\n        trees._tr_align(s);\n      }\n      else if (flush !== Z_BLOCK) { /* FULL_FLUSH or SYNC_FLUSH */\n\n        trees._tr_stored_block(s, 0, 0, false);\n        /* For a full flush, this empty block will be recognized\n         * as a special marker by inflate_sync().\n         */\n        if (flush === Z_FULL_FLUSH) {\n          /*** CLEAR_HASH(s); ***/             /* forget history */\n          zero(s.head); // Fill with NIL (= 0);\n\n          if (s.lookahead === 0) {\n            s.strstart = 0;\n            s.block_start = 0;\n            s.insert = 0;\n          }\n        }\n      }\n      flush_pending(strm);\n      if (strm.avail_out === 0) {\n        s.last_flush = -1; /* avoid BUF_ERROR at next call, see above */\n        return Z_OK;\n      }\n    }\n  }\n  //Assert(strm->avail_out > 0, \"bug2\");\n  //if (strm.avail_out <= 0) { throw new Error(\"bug2\");}\n\n  if (flush !== Z_FINISH) { return Z_OK; }\n  if (s.wrap <= 0) { return Z_STREAM_END; }\n\n  /* Write the trailer */\n  if (s.wrap === 2) {\n    put_byte(s, strm.adler & 0xff);\n    put_byte(s, (strm.adler >> 8) & 0xff);\n    put_byte(s, (strm.adler >> 16) & 0xff);\n    put_byte(s, (strm.adler >> 24) & 0xff);\n    put_byte(s, strm.total_in & 0xff);\n    put_byte(s, (strm.total_in >> 8) & 0xff);\n    put_byte(s, (strm.total_in >> 16) & 0xff);\n    put_byte(s, (strm.total_in >> 24) & 0xff);\n  }\n  else\n  {\n    putShortMSB(s, strm.adler >>> 16);\n    putShortMSB(s, strm.adler & 0xffff);\n  }\n\n  flush_pending(strm);\n  /* If avail_out is zero, the application will call deflate again\n   * to flush the rest.\n   */\n  if (s.wrap > 0) { s.wrap = -s.wrap; }\n  /* write the trailer only once! */\n  return s.pending !== 0 ? Z_OK : Z_STREAM_END;\n}\n\nfunction deflateEnd(strm) {\n  var status;\n\n  if (!strm/*== Z_NULL*/ || !strm.state/*== Z_NULL*/) {\n    return Z_STREAM_ERROR;\n  }\n\n  status = strm.state.status;\n  if (status !== INIT_STATE &&\n    status !== EXTRA_STATE &&\n    status !== NAME_STATE &&\n    status !== COMMENT_STATE &&\n    status !== HCRC_STATE &&\n    status !== BUSY_STATE &&\n    status !== FINISH_STATE\n  ) {\n    return err(strm, Z_STREAM_ERROR);\n  }\n\n  strm.state = null;\n\n  return status === BUSY_STATE ? err(strm, Z_DATA_ERROR) : Z_OK;\n}\n\n\n/* =========================================================================\n * Initializes the compression dictionary from the given byte\n * sequence without producing any compressed output.\n */\nfunction deflateSetDictionary(strm, dictionary) {\n  var dictLength = dictionary.length;\n\n  var s;\n  var str, n;\n  var wrap;\n  var avail;\n  var next;\n  var input;\n  var tmpDict;\n\n  if (!strm/*== Z_NULL*/ || !strm.state/*== Z_NULL*/) {\n    return Z_STREAM_ERROR;\n  }\n\n  s = strm.state;\n  wrap = s.wrap;\n\n  if (wrap === 2 || (wrap === 1 && s.status !== INIT_STATE) || s.lookahead) {\n    return Z_STREAM_ERROR;\n  }\n\n  /* when using zlib wrappers, compute Adler-32 for provided dictionary */\n  if (wrap === 1) {\n    /* adler32(strm->adler, dictionary, dictLength); */\n    strm.adler = adler32(strm.adler, dictionary, dictLength, 0);\n  }\n\n  s.wrap = 0;   /* avoid computing Adler-32 in read_buf */\n\n  /* if dictionary would fill window, just replace the history */\n  if (dictLength >= s.w_size) {\n    if (wrap === 0) {            /* already empty otherwise */\n      /*** CLEAR_HASH(s); ***/\n      zero(s.head); // Fill with NIL (= 0);\n      s.strstart = 0;\n      s.block_start = 0;\n      s.insert = 0;\n    }\n    /* use the tail */\n    // dictionary = dictionary.slice(dictLength - s.w_size);\n    tmpDict = new utils.Buf8(s.w_size);\n    utils.arraySet(tmpDict, dictionary, dictLength - s.w_size, s.w_size, 0);\n    dictionary = tmpDict;\n    dictLength = s.w_size;\n  }\n  /* insert dictionary into window and hash */\n  avail = strm.avail_in;\n  next = strm.next_in;\n  input = strm.input;\n  strm.avail_in = dictLength;\n  strm.next_in = 0;\n  strm.input = dictionary;\n  fill_window(s);\n  while (s.lookahead >= MIN_MATCH) {\n    str = s.strstart;\n    n = s.lookahead - (MIN_MATCH - 1);\n    do {\n      /* UPDATE_HASH(s, s->ins_h, s->window[str + MIN_MATCH-1]); */\n      s.ins_h = ((s.ins_h << s.hash_shift) ^ s.window[str + MIN_MATCH - 1]) & s.hash_mask;\n\n      s.prev[str & s.w_mask] = s.head[s.ins_h];\n\n      s.head[s.ins_h] = str;\n      str++;\n    } while (--n);\n    s.strstart = str;\n    s.lookahead = MIN_MATCH - 1;\n    fill_window(s);\n  }\n  s.strstart += s.lookahead;\n  s.block_start = s.strstart;\n  s.insert = s.lookahead;\n  s.lookahead = 0;\n  s.match_length = s.prev_length = MIN_MATCH - 1;\n  s.match_available = 0;\n  strm.next_in = next;\n  strm.input = input;\n  strm.avail_in = avail;\n  s.wrap = wrap;\n  return Z_OK;\n}\n\n\nexports.deflateInit = deflateInit;\nexports.deflateInit2 = deflateInit2;\nexports.deflateReset = deflateReset;\nexports.deflateResetKeep = deflateResetKeep;\nexports.deflateSetHeader = deflateSetHeader;\nexports.deflate = deflate;\nexports.deflateEnd = deflateEnd;\nexports.deflateSetDictionary = deflateSetDictionary;\nexports.deflateInfo = 'pako deflate (from Nodeca project)';\n\n/* Not implemented\nexports.deflateBound = deflateBound;\nexports.deflateCopy = deflateCopy;\nexports.deflateParams = deflateParams;\nexports.deflatePending = deflatePending;\nexports.deflatePrime = deflatePrime;\nexports.deflateTune = deflateTune;\n*/\n","'use strict';\n\n// (C) 1995-2013 Jean-loup Gailly and Mark Adler\n// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin\n//\n// This software is provided 'as-is', without any express or implied\n// warranty. In no event will the authors be held liable for any damages\n// arising from the use of this software.\n//\n// Permission is granted to anyone to use this software for any purpose,\n// including commercial applications, and to alter it and redistribute it\n// freely, subject to the following restrictions:\n//\n// 1. The origin of this software must not be misrepresented; you must not\n//   claim that you wrote the original software. If you use this software\n//   in a product, an acknowledgment in the product documentation would be\n//   appreciated but is not required.\n// 2. Altered source versions must be plainly marked as such, and must not be\n//   misrepresented as being the original software.\n// 3. This notice may not be removed or altered from any source distribution.\n\nfunction GZheader() {\n  /* true if compressed data believed to be text */\n  this.text       = 0;\n  /* modification time */\n  this.time       = 0;\n  /* extra flags (not used when writing a gzip file) */\n  this.xflags     = 0;\n  /* operating system */\n  this.os         = 0;\n  /* pointer to extra field or Z_NULL if none */\n  this.extra      = null;\n  /* extra field length (valid if extra != Z_NULL) */\n  this.extra_len  = 0; // Actually, we don't need it in JS,\n                       // but leave for few code modifications\n\n  //\n  // Setup limits is not necessary because in js we should not preallocate memory\n  // for inflate use constant limit in 65536 bytes\n  //\n\n  /* space at extra (only when reading header) */\n  // this.extra_max  = 0;\n  /* pointer to zero-terminated file name or Z_NULL */\n  this.name       = '';\n  /* space at name (only when reading header) */\n  // this.name_max   = 0;\n  /* pointer to zero-terminated comment or Z_NULL */\n  this.comment    = '';\n  /* space at comment (only when reading header) */\n  // this.comm_max   = 0;\n  /* true if there was or will be a header crc */\n  this.hcrc       = 0;\n  /* true when done reading gzip header (not used when writing a gzip file) */\n  this.done       = false;\n}\n\nmodule.exports = GZheader;\n","'use strict';\n\n// (C) 1995-2013 Jean-loup Gailly and Mark Adler\n// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin\n//\n// This software is provided 'as-is', without any express or implied\n// warranty. In no event will the authors be held liable for any damages\n// arising from the use of this software.\n//\n// Permission is granted to anyone to use this software for any purpose,\n// including commercial applications, and to alter it and redistribute it\n// freely, subject to the following restrictions:\n//\n// 1. The origin of this software must not be misrepresented; you must not\n//   claim that you wrote the original software. If you use this software\n//   in a product, an acknowledgment in the product documentation would be\n//   appreciated but is not required.\n// 2. Altered source versions must be plainly marked as such, and must not be\n//   misrepresented as being the original software.\n// 3. This notice may not be removed or altered from any source distribution.\n\n// See state defs from inflate.js\nvar BAD = 30;       /* got a data error -- remain here until reset */\nvar TYPE = 12;      /* i: waiting for type bits, including last-flag bit */\n\n/*\n   Decode literal, length, and distance codes and write out the resulting\n   literal and match bytes until either not enough input or output is\n   available, an end-of-block is encountered, or a data error is encountered.\n   When large enough input and output buffers are supplied to inflate(), for\n   example, a 16K input buffer and a 64K output buffer, more than 95% of the\n   inflate execution time is spent in this routine.\n\n   Entry assumptions:\n\n        state.mode === LEN\n        strm.avail_in >= 6\n        strm.avail_out >= 258\n        start >= strm.avail_out\n        state.bits < 8\n\n   On return, state.mode is one of:\n\n        LEN -- ran out of enough output space or enough available input\n        TYPE -- reached end of block code, inflate() to interpret next block\n        BAD -- error in block data\n\n   Notes:\n\n    - The maximum input bits used by a length/distance pair is 15 bits for the\n      length code, 5 bits for the length extra, 15 bits for the distance code,\n      and 13 bits for the distance extra.  This totals 48 bits, or six bytes.\n      Therefore if strm.avail_in >= 6, then there is enough input to avoid\n      checking for available input while decoding.\n\n    - The maximum bytes that a single length/distance pair can output is 258\n      bytes, which is the maximum length that can be coded.  inflate_fast()\n      requires strm.avail_out >= 258 for each loop to avoid checking for\n      output space.\n */\nmodule.exports = function inflate_fast(strm, start) {\n  var state;\n  var _in;                    /* local strm.input */\n  var last;                   /* have enough input while in < last */\n  var _out;                   /* local strm.output */\n  var beg;                    /* inflate()'s initial strm.output */\n  var end;                    /* while out < end, enough space available */\n//#ifdef INFLATE_STRICT\n  var dmax;                   /* maximum distance from zlib header */\n//#endif\n  var wsize;                  /* window size or zero if not using window */\n  var whave;                  /* valid bytes in the window */\n  var wnext;                  /* window write index */\n  // Use `s_window` instead `window`, avoid conflict with instrumentation tools\n  var s_window;               /* allocated sliding window, if wsize != 0 */\n  var hold;                   /* local strm.hold */\n  var bits;                   /* local strm.bits */\n  var lcode;                  /* local strm.lencode */\n  var dcode;                  /* local strm.distcode */\n  var lmask;                  /* mask for first level of length codes */\n  var dmask;                  /* mask for first level of distance codes */\n  var here;                   /* retrieved table entry */\n  var op;                     /* code bits, operation, extra bits, or */\n                              /*  window position, window bytes to copy */\n  var len;                    /* match length, unused bytes */\n  var dist;                   /* match distance */\n  var from;                   /* where to copy match from */\n  var from_source;\n\n\n  var input, output; // JS specific, because we have no pointers\n\n  /* copy state to local variables */\n  state = strm.state;\n  //here = state.here;\n  _in = strm.next_in;\n  input = strm.input;\n  last = _in + (strm.avail_in - 5);\n  _out = strm.next_out;\n  output = strm.output;\n  beg = _out - (start - strm.avail_out);\n  end = _out + (strm.avail_out - 257);\n//#ifdef INFLATE_STRICT\n  dmax = state.dmax;\n//#endif\n  wsize = state.wsize;\n  whave = state.whave;\n  wnext = state.wnext;\n  s_window = state.window;\n  hold = state.hold;\n  bits = state.bits;\n  lcode = state.lencode;\n  dcode = state.distcode;\n  lmask = (1 << state.lenbits) - 1;\n  dmask = (1 << state.distbits) - 1;\n\n\n  /* decode literals and length/distances until end-of-block or not enough\n     input data or output space */\n\n  top:\n  do {\n    if (bits < 15) {\n      hold += input[_in++] << bits;\n      bits += 8;\n      hold += input[_in++] << bits;\n      bits += 8;\n    }\n\n    here = lcode[hold & lmask];\n\n    dolen:\n    for (;;) { // Goto emulation\n      op = here >>> 24/*here.bits*/;\n      hold >>>= op;\n      bits -= op;\n      op = (here >>> 16) & 0xff/*here.op*/;\n      if (op === 0) {                          /* literal */\n        //Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ?\n        //        \"inflate:         literal '%c'\\n\" :\n        //        \"inflate:         literal 0x%02x\\n\", here.val));\n        output[_out++] = here & 0xffff/*here.val*/;\n      }\n      else if (op & 16) {                     /* length base */\n        len = here & 0xffff/*here.val*/;\n        op &= 15;                           /* number of extra bits */\n        if (op) {\n          if (bits < op) {\n            hold += input[_in++] << bits;\n            bits += 8;\n          }\n          len += hold & ((1 << op) - 1);\n          hold >>>= op;\n          bits -= op;\n        }\n        //Tracevv((stderr, \"inflate:         length %u\\n\", len));\n        if (bits < 15) {\n          hold += input[_in++] << bits;\n          bits += 8;\n          hold += input[_in++] << bits;\n          bits += 8;\n        }\n        here = dcode[hold & dmask];\n\n        dodist:\n        for (;;) { // goto emulation\n          op = here >>> 24/*here.bits*/;\n          hold >>>= op;\n          bits -= op;\n          op = (here >>> 16) & 0xff/*here.op*/;\n\n          if (op & 16) {                      /* distance base */\n            dist = here & 0xffff/*here.val*/;\n            op &= 15;                       /* number of extra bits */\n            if (bits < op) {\n              hold += input[_in++] << bits;\n              bits += 8;\n              if (bits < op) {\n                hold += input[_in++] << bits;\n                bits += 8;\n              }\n            }\n            dist += hold & ((1 << op) - 1);\n//#ifdef INFLATE_STRICT\n            if (dist > dmax) {\n              strm.msg = 'invalid distance too far back';\n              state.mode = BAD;\n              break top;\n            }\n//#endif\n            hold >>>= op;\n            bits -= op;\n            //Tracevv((stderr, \"inflate:         distance %u\\n\", dist));\n            op = _out - beg;                /* max distance in output */\n            if (dist > op) {                /* see if copy from window */\n              op = dist - op;               /* distance back in window */\n              if (op > whave) {\n                if (state.sane) {\n                  strm.msg = 'invalid distance too far back';\n                  state.mode = BAD;\n                  break top;\n                }\n\n// (!) This block is disabled in zlib defaults,\n// don't enable it for binary compatibility\n//#ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR\n//                if (len <= op - whave) {\n//                  do {\n//                    output[_out++] = 0;\n//                  } while (--len);\n//                  continue top;\n//                }\n//                len -= op - whave;\n//                do {\n//                  output[_out++] = 0;\n//                } while (--op > whave);\n//                if (op === 0) {\n//                  from = _out - dist;\n//                  do {\n//                    output[_out++] = output[from++];\n//                  } while (--len);\n//                  continue top;\n//                }\n//#endif\n              }\n              from = 0; // window index\n              from_source = s_window;\n              if (wnext === 0) {           /* very common case */\n                from += wsize - op;\n                if (op < len) {         /* some from window */\n                  len -= op;\n                  do {\n                    output[_out++] = s_window[from++];\n                  } while (--op);\n                  from = _out - dist;  /* rest from output */\n                  from_source = output;\n                }\n              }\n              else if (wnext < op) {      /* wrap around window */\n                from += wsize + wnext - op;\n                op -= wnext;\n                if (op < len) {         /* some from end of window */\n                  len -= op;\n                  do {\n                    output[_out++] = s_window[from++];\n                  } while (--op);\n                  from = 0;\n                  if (wnext < len) {  /* some from start of window */\n                    op = wnext;\n                    len -= op;\n                    do {\n                      output[_out++] = s_window[from++];\n                    } while (--op);\n                    from = _out - dist;      /* rest from output */\n                    from_source = output;\n                  }\n                }\n              }\n              else {                      /* contiguous in window */\n                from += wnext - op;\n                if (op < len) {         /* some from window */\n                  len -= op;\n                  do {\n                    output[_out++] = s_window[from++];\n                  } while (--op);\n                  from = _out - dist;  /* rest from output */\n                  from_source = output;\n                }\n              }\n              while (len > 2) {\n                output[_out++] = from_source[from++];\n                output[_out++] = from_source[from++];\n                output[_out++] = from_source[from++];\n                len -= 3;\n              }\n              if (len) {\n                output[_out++] = from_source[from++];\n                if (len > 1) {\n                  output[_out++] = from_source[from++];\n                }\n              }\n            }\n            else {\n              from = _out - dist;          /* copy direct from output */\n              do {                        /* minimum length is three */\n                output[_out++] = output[from++];\n                output[_out++] = output[from++];\n                output[_out++] = output[from++];\n                len -= 3;\n              } while (len > 2);\n              if (len) {\n                output[_out++] = output[from++];\n                if (len > 1) {\n                  output[_out++] = output[from++];\n                }\n              }\n            }\n          }\n          else if ((op & 64) === 0) {          /* 2nd level distance code */\n            here = dcode[(here & 0xffff)/*here.val*/ + (hold & ((1 << op) - 1))];\n            continue dodist;\n          }\n          else {\n            strm.msg = 'invalid distance code';\n            state.mode = BAD;\n            break top;\n          }\n\n          break; // need to emulate goto via \"continue\"\n        }\n      }\n      else if ((op & 64) === 0) {              /* 2nd level length code */\n        here = lcode[(here & 0xffff)/*here.val*/ + (hold & ((1 << op) - 1))];\n        continue dolen;\n      }\n      else if (op & 32) {                     /* end-of-block */\n        //Tracevv((stderr, \"inflate:         end of block\\n\"));\n        state.mode = TYPE;\n        break top;\n      }\n      else {\n        strm.msg = 'invalid literal/length code';\n        state.mode = BAD;\n        break top;\n      }\n\n      break; // need to emulate goto via \"continue\"\n    }\n  } while (_in < last && _out < end);\n\n  /* return unused bytes (on entry, bits < 8, so in won't go too far back) */\n  len = bits >> 3;\n  _in -= len;\n  bits -= len << 3;\n  hold &= (1 << bits) - 1;\n\n  /* update state and return */\n  strm.next_in = _in;\n  strm.next_out = _out;\n  strm.avail_in = (_in < last ? 5 + (last - _in) : 5 - (_in - last));\n  strm.avail_out = (_out < end ? 257 + (end - _out) : 257 - (_out - end));\n  state.hold = hold;\n  state.bits = bits;\n  return;\n};\n","'use strict';\n\n// (C) 1995-2013 Jean-loup Gailly and Mark Adler\n// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin\n//\n// This software is provided 'as-is', without any express or implied\n// warranty. In no event will the authors be held liable for any damages\n// arising from the use of this software.\n//\n// Permission is granted to anyone to use this software for any purpose,\n// including commercial applications, and to alter it and redistribute it\n// freely, subject to the following restrictions:\n//\n// 1. The origin of this software must not be misrepresented; you must not\n//   claim that you wrote the original software. If you use this software\n//   in a product, an acknowledgment in the product documentation would be\n//   appreciated but is not required.\n// 2. Altered source versions must be plainly marked as such, and must not be\n//   misrepresented as being the original software.\n// 3. This notice may not be removed or altered from any source distribution.\n\nvar utils         = require('../utils/common');\nvar adler32       = require('./adler32');\nvar crc32         = require('./crc32');\nvar inflate_fast  = require('./inffast');\nvar inflate_table = require('./inftrees');\n\nvar CODES = 0;\nvar LENS = 1;\nvar DISTS = 2;\n\n/* Public constants ==========================================================*/\n/* ===========================================================================*/\n\n\n/* Allowed flush values; see deflate() and inflate() below for details */\n//var Z_NO_FLUSH      = 0;\n//var Z_PARTIAL_FLUSH = 1;\n//var Z_SYNC_FLUSH    = 2;\n//var Z_FULL_FLUSH    = 3;\nvar Z_FINISH        = 4;\nvar Z_BLOCK         = 5;\nvar Z_TREES         = 6;\n\n\n/* Return codes for the compression/decompression functions. Negative values\n * are errors, positive values are used for special but normal events.\n */\nvar Z_OK            = 0;\nvar Z_STREAM_END    = 1;\nvar Z_NEED_DICT     = 2;\n//var Z_ERRNO         = -1;\nvar Z_STREAM_ERROR  = -2;\nvar Z_DATA_ERROR    = -3;\nvar Z_MEM_ERROR     = -4;\nvar Z_BUF_ERROR     = -5;\n//var Z_VERSION_ERROR = -6;\n\n/* The deflate compression method */\nvar Z_DEFLATED  = 8;\n\n\n/* STATES ====================================================================*/\n/* ===========================================================================*/\n\n\nvar    HEAD = 1;       /* i: waiting for magic header */\nvar    FLAGS = 2;      /* i: waiting for method and flags (gzip) */\nvar    TIME = 3;       /* i: waiting for modification time (gzip) */\nvar    OS = 4;         /* i: waiting for extra flags and operating system (gzip) */\nvar    EXLEN = 5;      /* i: waiting for extra length (gzip) */\nvar    EXTRA = 6;      /* i: waiting for extra bytes (gzip) */\nvar    NAME = 7;       /* i: waiting for end of file name (gzip) */\nvar    COMMENT = 8;    /* i: waiting for end of comment (gzip) */\nvar    HCRC = 9;       /* i: waiting for header crc (gzip) */\nvar    DICTID = 10;    /* i: waiting for dictionary check value */\nvar    DICT = 11;      /* waiting for inflateSetDictionary() call */\nvar        TYPE = 12;      /* i: waiting for type bits, including last-flag bit */\nvar        TYPEDO = 13;    /* i: same, but skip check to exit inflate on new block */\nvar        STORED = 14;    /* i: waiting for stored size (length and complement) */\nvar        COPY_ = 15;     /* i/o: same as COPY below, but only first time in */\nvar        COPY = 16;      /* i/o: waiting for input or output to copy stored block */\nvar        TABLE = 17;     /* i: waiting for dynamic block table lengths */\nvar        LENLENS = 18;   /* i: waiting for code length code lengths */\nvar        CODELENS = 19;  /* i: waiting for length/lit and distance code lengths */\nvar            LEN_ = 20;      /* i: same as LEN below, but only first time in */\nvar            LEN = 21;       /* i: waiting for length/lit/eob code */\nvar            LENEXT = 22;    /* i: waiting for length extra bits */\nvar            DIST = 23;      /* i: waiting for distance code */\nvar            DISTEXT = 24;   /* i: waiting for distance extra bits */\nvar            MATCH = 25;     /* o: waiting for output space to copy string */\nvar            LIT = 26;       /* o: waiting for output space to write literal */\nvar    CHECK = 27;     /* i: waiting for 32-bit check value */\nvar    LENGTH = 28;    /* i: waiting for 32-bit length (gzip) */\nvar    DONE = 29;      /* finished check, done -- remain here until reset */\nvar    BAD = 30;       /* got a data error -- remain here until reset */\nvar    MEM = 31;       /* got an inflate() memory error -- remain here until reset */\nvar    SYNC = 32;      /* looking for synchronization bytes to restart inflate() */\n\n/* ===========================================================================*/\n\n\n\nvar ENOUGH_LENS = 852;\nvar ENOUGH_DISTS = 592;\n//var ENOUGH =  (ENOUGH_LENS+ENOUGH_DISTS);\n\nvar MAX_WBITS = 15;\n/* 32K LZ77 window */\nvar DEF_WBITS = MAX_WBITS;\n\n\nfunction zswap32(q) {\n  return  (((q >>> 24) & 0xff) +\n          ((q >>> 8) & 0xff00) +\n          ((q & 0xff00) << 8) +\n          ((q & 0xff) << 24));\n}\n\n\nfunction InflateState() {\n  this.mode = 0;             /* current inflate mode */\n  this.last = false;          /* true if processing last block */\n  this.wrap = 0;              /* bit 0 true for zlib, bit 1 true for gzip */\n  this.havedict = false;      /* true if dictionary provided */\n  this.flags = 0;             /* gzip header method and flags (0 if zlib) */\n  this.dmax = 0;              /* zlib header max distance (INFLATE_STRICT) */\n  this.check = 0;             /* protected copy of check value */\n  this.total = 0;             /* protected copy of output count */\n  // TODO: may be {}\n  this.head = null;           /* where to save gzip header information */\n\n  /* sliding window */\n  this.wbits = 0;             /* log base 2 of requested window size */\n  this.wsize = 0;             /* window size or zero if not using window */\n  this.whave = 0;             /* valid bytes in the window */\n  this.wnext = 0;             /* window write index */\n  this.window = null;         /* allocated sliding window, if needed */\n\n  /* bit accumulator */\n  this.hold = 0;              /* input bit accumulator */\n  this.bits = 0;              /* number of bits in \"in\" */\n\n  /* for string and stored block copying */\n  this.length = 0;            /* literal or length of data to copy */\n  this.offset = 0;            /* distance back to copy string from */\n\n  /* for table and code decoding */\n  this.extra = 0;             /* extra bits needed */\n\n  /* fixed and dynamic code tables */\n  this.lencode = null;          /* starting table for length/literal codes */\n  this.distcode = null;         /* starting table for distance codes */\n  this.lenbits = 0;           /* index bits for lencode */\n  this.distbits = 0;          /* index bits for distcode */\n\n  /* dynamic table building */\n  this.ncode = 0;             /* number of code length code lengths */\n  this.nlen = 0;              /* number of length code lengths */\n  this.ndist = 0;             /* number of distance code lengths */\n  this.have = 0;              /* number of code lengths in lens[] */\n  this.next = null;              /* next available space in codes[] */\n\n  this.lens = new utils.Buf16(320); /* temporary storage for code lengths */\n  this.work = new utils.Buf16(288); /* work area for code table building */\n\n  /*\n   because we don't have pointers in js, we use lencode and distcode directly\n   as buffers so we don't need codes\n  */\n  //this.codes = new utils.Buf32(ENOUGH);       /* space for code tables */\n  this.lendyn = null;              /* dynamic table for length/literal codes (JS specific) */\n  this.distdyn = null;             /* dynamic table for distance codes (JS specific) */\n  this.sane = 0;                   /* if false, allow invalid distance too far */\n  this.back = 0;                   /* bits back of last unprocessed length/lit */\n  this.was = 0;                    /* initial length of match */\n}\n\nfunction inflateResetKeep(strm) {\n  var state;\n\n  if (!strm || !strm.state) { return Z_STREAM_ERROR; }\n  state = strm.state;\n  strm.total_in = strm.total_out = state.total = 0;\n  strm.msg = ''; /*Z_NULL*/\n  if (state.wrap) {       /* to support ill-conceived Java test suite */\n    strm.adler = state.wrap & 1;\n  }\n  state.mode = HEAD;\n  state.last = 0;\n  state.havedict = 0;\n  state.dmax = 32768;\n  state.head = null/*Z_NULL*/;\n  state.hold = 0;\n  state.bits = 0;\n  //state.lencode = state.distcode = state.next = state.codes;\n  state.lencode = state.lendyn = new utils.Buf32(ENOUGH_LENS);\n  state.distcode = state.distdyn = new utils.Buf32(ENOUGH_DISTS);\n\n  state.sane = 1;\n  state.back = -1;\n  //Tracev((stderr, \"inflate: reset\\n\"));\n  return Z_OK;\n}\n\nfunction inflateReset(strm) {\n  var state;\n\n  if (!strm || !strm.state) { return Z_STREAM_ERROR; }\n  state = strm.state;\n  state.wsize = 0;\n  state.whave = 0;\n  state.wnext = 0;\n  return inflateResetKeep(strm);\n\n}\n\nfunction inflateReset2(strm, windowBits) {\n  var wrap;\n  var state;\n\n  /* get the state */\n  if (!strm || !strm.state) { return Z_STREAM_ERROR; }\n  state = strm.state;\n\n  /* extract wrap request from windowBits parameter */\n  if (windowBits < 0) {\n    wrap = 0;\n    windowBits = -windowBits;\n  }\n  else {\n    wrap = (windowBits >> 4) + 1;\n    if (windowBits < 48) {\n      windowBits &= 15;\n    }\n  }\n\n  /* set number of window bits, free window if different */\n  if (windowBits && (windowBits < 8 || windowBits > 15)) {\n    return Z_STREAM_ERROR;\n  }\n  if (state.window !== null && state.wbits !== windowBits) {\n    state.window = null;\n  }\n\n  /* update state and reset the rest of it */\n  state.wrap = wrap;\n  state.wbits = windowBits;\n  return inflateReset(strm);\n}\n\nfunction inflateInit2(strm, windowBits) {\n  var ret;\n  var state;\n\n  if (!strm) { return Z_STREAM_ERROR; }\n  //strm.msg = Z_NULL;                 /* in case we return an error */\n\n  state = new InflateState();\n\n  //if (state === Z_NULL) return Z_MEM_ERROR;\n  //Tracev((stderr, \"inflate: allocated\\n\"));\n  strm.state = state;\n  state.window = null/*Z_NULL*/;\n  ret = inflateReset2(strm, windowBits);\n  if (ret !== Z_OK) {\n    strm.state = null/*Z_NULL*/;\n  }\n  return ret;\n}\n\nfunction inflateInit(strm) {\n  return inflateInit2(strm, DEF_WBITS);\n}\n\n\n/*\n Return state with length and distance decoding tables and index sizes set to\n fixed code decoding.  Normally this returns fixed tables from inffixed.h.\n If BUILDFIXED is defined, then instead this routine builds the tables the\n first time it's called, and returns those tables the first time and\n thereafter.  This reduces the size of the code by about 2K bytes, in\n exchange for a little execution time.  However, BUILDFIXED should not be\n used for threaded applications, since the rewriting of the tables and virgin\n may not be thread-safe.\n */\nvar virgin = true;\n\nvar lenfix, distfix; // We have no pointers in JS, so keep tables separate\n\nfunction fixedtables(state) {\n  /* build fixed huffman tables if first call (may not be thread safe) */\n  if (virgin) {\n    var sym;\n\n    lenfix = new utils.Buf32(512);\n    distfix = new utils.Buf32(32);\n\n    /* literal/length table */\n    sym = 0;\n    while (sym < 144) { state.lens[sym++] = 8; }\n    while (sym < 256) { state.lens[sym++] = 9; }\n    while (sym < 280) { state.lens[sym++] = 7; }\n    while (sym < 288) { state.lens[sym++] = 8; }\n\n    inflate_table(LENS,  state.lens, 0, 288, lenfix,   0, state.work, { bits: 9 });\n\n    /* distance table */\n    sym = 0;\n    while (sym < 32) { state.lens[sym++] = 5; }\n\n    inflate_table(DISTS, state.lens, 0, 32,   distfix, 0, state.work, { bits: 5 });\n\n    /* do this just once */\n    virgin = false;\n  }\n\n  state.lencode = lenfix;\n  state.lenbits = 9;\n  state.distcode = distfix;\n  state.distbits = 5;\n}\n\n\n/*\n Update the window with the last wsize (normally 32K) bytes written before\n returning.  If window does not exist yet, create it.  This is only called\n when a window is already in use, or when output has been written during this\n inflate call, but the end of the deflate stream has not been reached yet.\n It is also called to create a window for dictionary data when a dictionary\n is loaded.\n\n Providing output buffers larger than 32K to inflate() should provide a speed\n advantage, since only the last 32K of output is copied to the sliding window\n upon return from inflate(), and since all distances after the first 32K of\n output will fall in the output data, making match copies simpler and faster.\n The advantage may be dependent on the size of the processor's data caches.\n */\nfunction updatewindow(strm, src, end, copy) {\n  var dist;\n  var state = strm.state;\n\n  /* if it hasn't been done already, allocate space for the window */\n  if (state.window === null) {\n    state.wsize = 1 << state.wbits;\n    state.wnext = 0;\n    state.whave = 0;\n\n    state.window = new utils.Buf8(state.wsize);\n  }\n\n  /* copy state->wsize or less output bytes into the circular window */\n  if (copy >= state.wsize) {\n    utils.arraySet(state.window, src, end - state.wsize, state.wsize, 0);\n    state.wnext = 0;\n    state.whave = state.wsize;\n  }\n  else {\n    dist = state.wsize - state.wnext;\n    if (dist > copy) {\n      dist = copy;\n    }\n    //zmemcpy(state->window + state->wnext, end - copy, dist);\n    utils.arraySet(state.window, src, end - copy, dist, state.wnext);\n    copy -= dist;\n    if (copy) {\n      //zmemcpy(state->window, end - copy, copy);\n      utils.arraySet(state.window, src, end - copy, copy, 0);\n      state.wnext = copy;\n      state.whave = state.wsize;\n    }\n    else {\n      state.wnext += dist;\n      if (state.wnext === state.wsize) { state.wnext = 0; }\n      if (state.whave < state.wsize) { state.whave += dist; }\n    }\n  }\n  return 0;\n}\n\nfunction inflate(strm, flush) {\n  var state;\n  var input, output;          // input/output buffers\n  var next;                   /* next input INDEX */\n  var put;                    /* next output INDEX */\n  var have, left;             /* available input and output */\n  var hold;                   /* bit buffer */\n  var bits;                   /* bits in bit buffer */\n  var _in, _out;              /* save starting available input and output */\n  var copy;                   /* number of stored or match bytes to copy */\n  var from;                   /* where to copy match bytes from */\n  var from_source;\n  var here = 0;               /* current decoding table entry */\n  var here_bits, here_op, here_val; // paked \"here\" denormalized (JS specific)\n  //var last;                   /* parent table entry */\n  var last_bits, last_op, last_val; // paked \"last\" denormalized (JS specific)\n  var len;                    /* length to copy for repeats, bits to drop */\n  var ret;                    /* return code */\n  var hbuf = new utils.Buf8(4);    /* buffer for gzip header crc calculation */\n  var opts;\n\n  var n; // temporary var for NEED_BITS\n\n  var order = /* permutation of code lengths */\n    [ 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15 ];\n\n\n  if (!strm || !strm.state || !strm.output ||\n      (!strm.input && strm.avail_in !== 0)) {\n    return Z_STREAM_ERROR;\n  }\n\n  state = strm.state;\n  if (state.mode === TYPE) { state.mode = TYPEDO; }    /* skip check */\n\n\n  //--- LOAD() ---\n  put = strm.next_out;\n  output = strm.output;\n  left = strm.avail_out;\n  next = strm.next_in;\n  input = strm.input;\n  have = strm.avail_in;\n  hold = state.hold;\n  bits = state.bits;\n  //---\n\n  _in = have;\n  _out = left;\n  ret = Z_OK;\n\n  inf_leave: // goto emulation\n  for (;;) {\n    switch (state.mode) {\n      case HEAD:\n        if (state.wrap === 0) {\n          state.mode = TYPEDO;\n          break;\n        }\n        //=== NEEDBITS(16);\n        while (bits < 16) {\n          if (have === 0) { break inf_leave; }\n          have--;\n          hold += input[next++] << bits;\n          bits += 8;\n        }\n        //===//\n        if ((state.wrap & 2) && hold === 0x8b1f) {  /* gzip header */\n          state.check = 0/*crc32(0L, Z_NULL, 0)*/;\n          //=== CRC2(state.check, hold);\n          hbuf[0] = hold & 0xff;\n          hbuf[1] = (hold >>> 8) & 0xff;\n          state.check = crc32(state.check, hbuf, 2, 0);\n          //===//\n\n          //=== INITBITS();\n          hold = 0;\n          bits = 0;\n          //===//\n          state.mode = FLAGS;\n          break;\n        }\n        state.flags = 0;           /* expect zlib header */\n        if (state.head) {\n          state.head.done = false;\n        }\n        if (!(state.wrap & 1) ||   /* check if zlib header allowed */\n          (((hold & 0xff)/*BITS(8)*/ << 8) + (hold >> 8)) % 31) {\n          strm.msg = 'incorrect header check';\n          state.mode = BAD;\n          break;\n        }\n        if ((hold & 0x0f)/*BITS(4)*/ !== Z_DEFLATED) {\n          strm.msg = 'unknown compression method';\n          state.mode = BAD;\n          break;\n        }\n        //--- DROPBITS(4) ---//\n        hold >>>= 4;\n        bits -= 4;\n        //---//\n        len = (hold & 0x0f)/*BITS(4)*/ + 8;\n        if (state.wbits === 0) {\n          state.wbits = len;\n        }\n        else if (len > state.wbits) {\n          strm.msg = 'invalid window size';\n          state.mode = BAD;\n          break;\n        }\n        state.dmax = 1 << len;\n        //Tracev((stderr, \"inflate:   zlib header ok\\n\"));\n        strm.adler = state.check = 1/*adler32(0L, Z_NULL, 0)*/;\n        state.mode = hold & 0x200 ? DICTID : TYPE;\n        //=== INITBITS();\n        hold = 0;\n        bits = 0;\n        //===//\n        break;\n      case FLAGS:\n        //=== NEEDBITS(16); */\n        while (bits < 16) {\n          if (have === 0) { break inf_leave; }\n          have--;\n          hold += input[next++] << bits;\n          bits += 8;\n        }\n        //===//\n        state.flags = hold;\n        if ((state.flags & 0xff) !== Z_DEFLATED) {\n          strm.msg = 'unknown compression method';\n          state.mode = BAD;\n          break;\n        }\n        if (state.flags & 0xe000) {\n          strm.msg = 'unknown header flags set';\n          state.mode = BAD;\n          break;\n        }\n        if (state.head) {\n          state.head.text = ((hold >> 8) & 1);\n        }\n        if (state.flags & 0x0200) {\n          //=== CRC2(state.check, hold);\n          hbuf[0] = hold & 0xff;\n          hbuf[1] = (hold >>> 8) & 0xff;\n          state.check = crc32(state.check, hbuf, 2, 0);\n          //===//\n        }\n        //=== INITBITS();\n        hold = 0;\n        bits = 0;\n        //===//\n        state.mode = TIME;\n        /* falls through */\n      case TIME:\n        //=== NEEDBITS(32); */\n        while (bits < 32) {\n          if (have === 0) { break inf_leave; }\n          have--;\n          hold += input[next++] << bits;\n          bits += 8;\n        }\n        //===//\n        if (state.head) {\n          state.head.time = hold;\n        }\n        if (state.flags & 0x0200) {\n          //=== CRC4(state.check, hold)\n          hbuf[0] = hold & 0xff;\n          hbuf[1] = (hold >>> 8) & 0xff;\n          hbuf[2] = (hold >>> 16) & 0xff;\n          hbuf[3] = (hold >>> 24) & 0xff;\n          state.check = crc32(state.check, hbuf, 4, 0);\n          //===\n        }\n        //=== INITBITS();\n        hold = 0;\n        bits = 0;\n        //===//\n        state.mode = OS;\n        /* falls through */\n      case OS:\n        //=== NEEDBITS(16); */\n        while (bits < 16) {\n          if (have === 0) { break inf_leave; }\n          have--;\n          hold += input[next++] << bits;\n          bits += 8;\n        }\n        //===//\n        if (state.head) {\n          state.head.xflags = (hold & 0xff);\n          state.head.os = (hold >> 8);\n        }\n        if (state.flags & 0x0200) {\n          //=== CRC2(state.check, hold);\n          hbuf[0] = hold & 0xff;\n          hbuf[1] = (hold >>> 8) & 0xff;\n          state.check = crc32(state.check, hbuf, 2, 0);\n          //===//\n        }\n        //=== INITBITS();\n        hold = 0;\n        bits = 0;\n        //===//\n        state.mode = EXLEN;\n        /* falls through */\n      case EXLEN:\n        if (state.flags & 0x0400) {\n          //=== NEEDBITS(16); */\n          while (bits < 16) {\n            if (have === 0) { break inf_leave; }\n            have--;\n            hold += input[next++] << bits;\n            bits += 8;\n          }\n          //===//\n          state.length = hold;\n          if (state.head) {\n            state.head.extra_len = hold;\n          }\n          if (state.flags & 0x0200) {\n            //=== CRC2(state.check, hold);\n            hbuf[0] = hold & 0xff;\n            hbuf[1] = (hold >>> 8) & 0xff;\n            state.check = crc32(state.check, hbuf, 2, 0);\n            //===//\n          }\n          //=== INITBITS();\n          hold = 0;\n          bits = 0;\n          //===//\n        }\n        else if (state.head) {\n          state.head.extra = null/*Z_NULL*/;\n        }\n        state.mode = EXTRA;\n        /* falls through */\n      case EXTRA:\n        if (state.flags & 0x0400) {\n          copy = state.length;\n          if (copy > have) { copy = have; }\n          if (copy) {\n            if (state.head) {\n              len = state.head.extra_len - state.length;\n              if (!state.head.extra) {\n                // Use untyped array for more convenient processing later\n                state.head.extra = new Array(state.head.extra_len);\n              }\n              utils.arraySet(\n                state.head.extra,\n                input,\n                next,\n                // extra field is limited to 65536 bytes\n                // - no need for additional size check\n                copy,\n                /*len + copy > state.head.extra_max - len ? state.head.extra_max : copy,*/\n                len\n              );\n              //zmemcpy(state.head.extra + len, next,\n              //        len + copy > state.head.extra_max ?\n              //        state.head.extra_max - len : copy);\n            }\n            if (state.flags & 0x0200) {\n              state.check = crc32(state.check, input, copy, next);\n            }\n            have -= copy;\n            next += copy;\n            state.length -= copy;\n          }\n          if (state.length) { break inf_leave; }\n        }\n        state.length = 0;\n        state.mode = NAME;\n        /* falls through */\n      case NAME:\n        if (state.flags & 0x0800) {\n          if (have === 0) { break inf_leave; }\n          copy = 0;\n          do {\n            // TODO: 2 or 1 bytes?\n            len = input[next + copy++];\n            /* use constant limit because in js we should not preallocate memory */\n            if (state.head && len &&\n                (state.length < 65536 /*state.head.name_max*/)) {\n              state.head.name += String.fromCharCode(len);\n            }\n          } while (len && copy < have);\n\n          if (state.flags & 0x0200) {\n            state.check = crc32(state.check, input, copy, next);\n          }\n          have -= copy;\n          next += copy;\n          if (len) { break inf_leave; }\n        }\n        else if (state.head) {\n          state.head.name = null;\n        }\n        state.length = 0;\n        state.mode = COMMENT;\n        /* falls through */\n      case COMMENT:\n        if (state.flags & 0x1000) {\n          if (have === 0) { break inf_leave; }\n          copy = 0;\n          do {\n            len = input[next + copy++];\n            /* use constant limit because in js we should not preallocate memory */\n            if (state.head && len &&\n                (state.length < 65536 /*state.head.comm_max*/)) {\n              state.head.comment += String.fromCharCode(len);\n            }\n          } while (len && copy < have);\n          if (state.flags & 0x0200) {\n            state.check = crc32(state.check, input, copy, next);\n          }\n          have -= copy;\n          next += copy;\n          if (len) { break inf_leave; }\n        }\n        else if (state.head) {\n          state.head.comment = null;\n        }\n        state.mode = HCRC;\n        /* falls through */\n      case HCRC:\n        if (state.flags & 0x0200) {\n          //=== NEEDBITS(16); */\n          while (bits < 16) {\n            if (have === 0) { break inf_leave; }\n            have--;\n            hold += input[next++] << bits;\n            bits += 8;\n          }\n          //===//\n          if (hold !== (state.check & 0xffff)) {\n            strm.msg = 'header crc mismatch';\n            state.mode = BAD;\n            break;\n          }\n          //=== INITBITS();\n          hold = 0;\n          bits = 0;\n          //===//\n        }\n        if (state.head) {\n          state.head.hcrc = ((state.flags >> 9) & 1);\n          state.head.done = true;\n        }\n        strm.adler = state.check = 0;\n        state.mode = TYPE;\n        break;\n      case DICTID:\n        //=== NEEDBITS(32); */\n        while (bits < 32) {\n          if (have === 0) { break inf_leave; }\n          have--;\n          hold += input[next++] << bits;\n          bits += 8;\n        }\n        //===//\n        strm.adler = state.check = zswap32(hold);\n        //=== INITBITS();\n        hold = 0;\n        bits = 0;\n        //===//\n        state.mode = DICT;\n        /* falls through */\n      case DICT:\n        if (state.havedict === 0) {\n          //--- RESTORE() ---\n          strm.next_out = put;\n          strm.avail_out = left;\n          strm.next_in = next;\n          strm.avail_in = have;\n          state.hold = hold;\n          state.bits = bits;\n          //---\n          return Z_NEED_DICT;\n        }\n        strm.adler = state.check = 1/*adler32(0L, Z_NULL, 0)*/;\n        state.mode = TYPE;\n        /* falls through */\n      case TYPE:\n        if (flush === Z_BLOCK || flush === Z_TREES) { break inf_leave; }\n        /* falls through */\n      case TYPEDO:\n        if (state.last) {\n          //--- BYTEBITS() ---//\n          hold >>>= bits & 7;\n          bits -= bits & 7;\n          //---//\n          state.mode = CHECK;\n          break;\n        }\n        //=== NEEDBITS(3); */\n        while (bits < 3) {\n          if (have === 0) { break inf_leave; }\n          have--;\n          hold += input[next++] << bits;\n          bits += 8;\n        }\n        //===//\n        state.last = (hold & 0x01)/*BITS(1)*/;\n        //--- DROPBITS(1) ---//\n        hold >>>= 1;\n        bits -= 1;\n        //---//\n\n        switch ((hold & 0x03)/*BITS(2)*/) {\n          case 0:                             /* stored block */\n            //Tracev((stderr, \"inflate:     stored block%s\\n\",\n            //        state.last ? \" (last)\" : \"\"));\n            state.mode = STORED;\n            break;\n          case 1:                             /* fixed block */\n            fixedtables(state);\n            //Tracev((stderr, \"inflate:     fixed codes block%s\\n\",\n            //        state.last ? \" (last)\" : \"\"));\n            state.mode = LEN_;             /* decode codes */\n            if (flush === Z_TREES) {\n              //--- DROPBITS(2) ---//\n              hold >>>= 2;\n              bits -= 2;\n              //---//\n              break inf_leave;\n            }\n            break;\n          case 2:                             /* dynamic block */\n            //Tracev((stderr, \"inflate:     dynamic codes block%s\\n\",\n            //        state.last ? \" (last)\" : \"\"));\n            state.mode = TABLE;\n            break;\n          case 3:\n            strm.msg = 'invalid block type';\n            state.mode = BAD;\n        }\n        //--- DROPBITS(2) ---//\n        hold >>>= 2;\n        bits -= 2;\n        //---//\n        break;\n      case STORED:\n        //--- BYTEBITS() ---// /* go to byte boundary */\n        hold >>>= bits & 7;\n        bits -= bits & 7;\n        //---//\n        //=== NEEDBITS(32); */\n        while (bits < 32) {\n          if (have === 0) { break inf_leave; }\n          have--;\n          hold += input[next++] << bits;\n          bits += 8;\n        }\n        //===//\n        if ((hold & 0xffff) !== ((hold >>> 16) ^ 0xffff)) {\n          strm.msg = 'invalid stored block lengths';\n          state.mode = BAD;\n          break;\n        }\n        state.length = hold & 0xffff;\n        //Tracev((stderr, \"inflate:       stored length %u\\n\",\n        //        state.length));\n        //=== INITBITS();\n        hold = 0;\n        bits = 0;\n        //===//\n        state.mode = COPY_;\n        if (flush === Z_TREES) { break inf_leave; }\n        /* falls through */\n      case COPY_:\n        state.mode = COPY;\n        /* falls through */\n      case COPY:\n        copy = state.length;\n        if (copy) {\n          if (copy > have) { copy = have; }\n          if (copy > left) { copy = left; }\n          if (copy === 0) { break inf_leave; }\n          //--- zmemcpy(put, next, copy); ---\n          utils.arraySet(output, input, next, copy, put);\n          //---//\n          have -= copy;\n          next += copy;\n          left -= copy;\n          put += copy;\n          state.length -= copy;\n          break;\n        }\n        //Tracev((stderr, \"inflate:       stored end\\n\"));\n        state.mode = TYPE;\n        break;\n      case TABLE:\n        //=== NEEDBITS(14); */\n        while (bits < 14) {\n          if (have === 0) { break inf_leave; }\n          have--;\n          hold += input[next++] << bits;\n          bits += 8;\n        }\n        //===//\n        state.nlen = (hold & 0x1f)/*BITS(5)*/ + 257;\n        //--- DROPBITS(5) ---//\n        hold >>>= 5;\n        bits -= 5;\n        //---//\n        state.ndist = (hold & 0x1f)/*BITS(5)*/ + 1;\n        //--- DROPBITS(5) ---//\n        hold >>>= 5;\n        bits -= 5;\n        //---//\n        state.ncode = (hold & 0x0f)/*BITS(4)*/ + 4;\n        //--- DROPBITS(4) ---//\n        hold >>>= 4;\n        bits -= 4;\n        //---//\n//#ifndef PKZIP_BUG_WORKAROUND\n        if (state.nlen > 286 || state.ndist > 30) {\n          strm.msg = 'too many length or distance symbols';\n          state.mode = BAD;\n          break;\n        }\n//#endif\n        //Tracev((stderr, \"inflate:       table sizes ok\\n\"));\n        state.have = 0;\n        state.mode = LENLENS;\n        /* falls through */\n      case LENLENS:\n        while (state.have < state.ncode) {\n          //=== NEEDBITS(3);\n          while (bits < 3) {\n            if (have === 0) { break inf_leave; }\n            have--;\n            hold += input[next++] << bits;\n            bits += 8;\n          }\n          //===//\n          state.lens[order[state.have++]] = (hold & 0x07);//BITS(3);\n          //--- DROPBITS(3) ---//\n          hold >>>= 3;\n          bits -= 3;\n          //---//\n        }\n        while (state.have < 19) {\n          state.lens[order[state.have++]] = 0;\n        }\n        // We have separate tables & no pointers. 2 commented lines below not needed.\n        //state.next = state.codes;\n        //state.lencode = state.next;\n        // Switch to use dynamic table\n        state.lencode = state.lendyn;\n        state.lenbits = 7;\n\n        opts = { bits: state.lenbits };\n        ret = inflate_table(CODES, state.lens, 0, 19, state.lencode, 0, state.work, opts);\n        state.lenbits = opts.bits;\n\n        if (ret) {\n          strm.msg = 'invalid code lengths set';\n          state.mode = BAD;\n          break;\n        }\n        //Tracev((stderr, \"inflate:       code lengths ok\\n\"));\n        state.have = 0;\n        state.mode = CODELENS;\n        /* falls through */\n      case CODELENS:\n        while (state.have < state.nlen + state.ndist) {\n          for (;;) {\n            here = state.lencode[hold & ((1 << state.lenbits) - 1)];/*BITS(state.lenbits)*/\n            here_bits = here >>> 24;\n            here_op = (here >>> 16) & 0xff;\n            here_val = here & 0xffff;\n\n            if ((here_bits) <= bits) { break; }\n            //--- PULLBYTE() ---//\n            if (have === 0) { break inf_leave; }\n            have--;\n            hold += input[next++] << bits;\n            bits += 8;\n            //---//\n          }\n          if (here_val < 16) {\n            //--- DROPBITS(here.bits) ---//\n            hold >>>= here_bits;\n            bits -= here_bits;\n            //---//\n            state.lens[state.have++] = here_val;\n          }\n          else {\n            if (here_val === 16) {\n              //=== NEEDBITS(here.bits + 2);\n              n = here_bits + 2;\n              while (bits < n) {\n                if (have === 0) { break inf_leave; }\n                have--;\n                hold += input[next++] << bits;\n                bits += 8;\n              }\n              //===//\n              //--- DROPBITS(here.bits) ---//\n              hold >>>= here_bits;\n              bits -= here_bits;\n              //---//\n              if (state.have === 0) {\n                strm.msg = 'invalid bit length repeat';\n                state.mode = BAD;\n                break;\n              }\n              len = state.lens[state.have - 1];\n              copy = 3 + (hold & 0x03);//BITS(2);\n              //--- DROPBITS(2) ---//\n              hold >>>= 2;\n              bits -= 2;\n              //---//\n            }\n            else if (here_val === 17) {\n              //=== NEEDBITS(here.bits + 3);\n              n = here_bits + 3;\n              while (bits < n) {\n                if (have === 0) { break inf_leave; }\n                have--;\n                hold += input[next++] << bits;\n                bits += 8;\n              }\n              //===//\n              //--- DROPBITS(here.bits) ---//\n              hold >>>= here_bits;\n              bits -= here_bits;\n              //---//\n              len = 0;\n              copy = 3 + (hold & 0x07);//BITS(3);\n              //--- DROPBITS(3) ---//\n              hold >>>= 3;\n              bits -= 3;\n              //---//\n            }\n            else {\n              //=== NEEDBITS(here.bits + 7);\n              n = here_bits + 7;\n              while (bits < n) {\n                if (have === 0) { break inf_leave; }\n                have--;\n                hold += input[next++] << bits;\n                bits += 8;\n              }\n              //===//\n              //--- DROPBITS(here.bits) ---//\n              hold >>>= here_bits;\n              bits -= here_bits;\n              //---//\n              len = 0;\n              copy = 11 + (hold & 0x7f);//BITS(7);\n              //--- DROPBITS(7) ---//\n              hold >>>= 7;\n              bits -= 7;\n              //---//\n            }\n            if (state.have + copy > state.nlen + state.ndist) {\n              strm.msg = 'invalid bit length repeat';\n              state.mode = BAD;\n              break;\n            }\n            while (copy--) {\n              state.lens[state.have++] = len;\n            }\n          }\n        }\n\n        /* handle error breaks in while */\n        if (state.mode === BAD) { break; }\n\n        /* check for end-of-block code (better have one) */\n        if (state.lens[256] === 0) {\n          strm.msg = 'invalid code -- missing end-of-block';\n          state.mode = BAD;\n          break;\n        }\n\n        /* build code tables -- note: do not change the lenbits or distbits\n           values here (9 and 6) without reading the comments in inftrees.h\n           concerning the ENOUGH constants, which depend on those values */\n        state.lenbits = 9;\n\n        opts = { bits: state.lenbits };\n        ret = inflate_table(LENS, state.lens, 0, state.nlen, state.lencode, 0, state.work, opts);\n        // We have separate tables & no pointers. 2 commented lines below not needed.\n        // state.next_index = opts.table_index;\n        state.lenbits = opts.bits;\n        // state.lencode = state.next;\n\n        if (ret) {\n          strm.msg = 'invalid literal/lengths set';\n          state.mode = BAD;\n          break;\n        }\n\n        state.distbits = 6;\n        //state.distcode.copy(state.codes);\n        // Switch to use dynamic table\n        state.distcode = state.distdyn;\n        opts = { bits: state.distbits };\n        ret = inflate_table(DISTS, state.lens, state.nlen, state.ndist, state.distcode, 0, state.work, opts);\n        // We have separate tables & no pointers. 2 commented lines below not needed.\n        // state.next_index = opts.table_index;\n        state.distbits = opts.bits;\n        // state.distcode = state.next;\n\n        if (ret) {\n          strm.msg = 'invalid distances set';\n          state.mode = BAD;\n          break;\n        }\n        //Tracev((stderr, 'inflate:       codes ok\\n'));\n        state.mode = LEN_;\n        if (flush === Z_TREES) { break inf_leave; }\n        /* falls through */\n      case LEN_:\n        state.mode = LEN;\n        /* falls through */\n      case LEN:\n        if (have >= 6 && left >= 258) {\n          //--- RESTORE() ---\n          strm.next_out = put;\n          strm.avail_out = left;\n          strm.next_in = next;\n          strm.avail_in = have;\n          state.hold = hold;\n          state.bits = bits;\n          //---\n          inflate_fast(strm, _out);\n          //--- LOAD() ---\n          put = strm.next_out;\n          output = strm.output;\n          left = strm.avail_out;\n          next = strm.next_in;\n          input = strm.input;\n          have = strm.avail_in;\n          hold = state.hold;\n          bits = state.bits;\n          //---\n\n          if (state.mode === TYPE) {\n            state.back = -1;\n          }\n          break;\n        }\n        state.back = 0;\n        for (;;) {\n          here = state.lencode[hold & ((1 << state.lenbits) - 1)];  /*BITS(state.lenbits)*/\n          here_bits = here >>> 24;\n          here_op = (here >>> 16) & 0xff;\n          here_val = here & 0xffff;\n\n          if (here_bits <= bits) { break; }\n          //--- PULLBYTE() ---//\n          if (have === 0) { break inf_leave; }\n          have--;\n          hold += input[next++] << bits;\n          bits += 8;\n          //---//\n        }\n        if (here_op && (here_op & 0xf0) === 0) {\n          last_bits = here_bits;\n          last_op = here_op;\n          last_val = here_val;\n          for (;;) {\n            here = state.lencode[last_val +\n                    ((hold & ((1 << (last_bits + last_op)) - 1))/*BITS(last.bits + last.op)*/ >> last_bits)];\n            here_bits = here >>> 24;\n            here_op = (here >>> 16) & 0xff;\n            here_val = here & 0xffff;\n\n            if ((last_bits + here_bits) <= bits) { break; }\n            //--- PULLBYTE() ---//\n            if (have === 0) { break inf_leave; }\n            have--;\n            hold += input[next++] << bits;\n            bits += 8;\n            //---//\n          }\n          //--- DROPBITS(last.bits) ---//\n          hold >>>= last_bits;\n          bits -= last_bits;\n          //---//\n          state.back += last_bits;\n        }\n        //--- DROPBITS(here.bits) ---//\n        hold >>>= here_bits;\n        bits -= here_bits;\n        //---//\n        state.back += here_bits;\n        state.length = here_val;\n        if (here_op === 0) {\n          //Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ?\n          //        \"inflate:         literal '%c'\\n\" :\n          //        \"inflate:         literal 0x%02x\\n\", here.val));\n          state.mode = LIT;\n          break;\n        }\n        if (here_op & 32) {\n          //Tracevv((stderr, \"inflate:         end of block\\n\"));\n          state.back = -1;\n          state.mode = TYPE;\n          break;\n        }\n        if (here_op & 64) {\n          strm.msg = 'invalid literal/length code';\n          state.mode = BAD;\n          break;\n        }\n        state.extra = here_op & 15;\n        state.mode = LENEXT;\n        /* falls through */\n      case LENEXT:\n        if (state.extra) {\n          //=== NEEDBITS(state.extra);\n          n = state.extra;\n          while (bits < n) {\n            if (have === 0) { break inf_leave; }\n            have--;\n            hold += input[next++] << bits;\n            bits += 8;\n          }\n          //===//\n          state.length += hold & ((1 << state.extra) - 1)/*BITS(state.extra)*/;\n          //--- DROPBITS(state.extra) ---//\n          hold >>>= state.extra;\n          bits -= state.extra;\n          //---//\n          state.back += state.extra;\n        }\n        //Tracevv((stderr, \"inflate:         length %u\\n\", state.length));\n        state.was = state.length;\n        state.mode = DIST;\n        /* falls through */\n      case DIST:\n        for (;;) {\n          here = state.distcode[hold & ((1 << state.distbits) - 1)];/*BITS(state.distbits)*/\n          here_bits = here >>> 24;\n          here_op = (here >>> 16) & 0xff;\n          here_val = here & 0xffff;\n\n          if ((here_bits) <= bits) { break; }\n          //--- PULLBYTE() ---//\n          if (have === 0) { break inf_leave; }\n          have--;\n          hold += input[next++] << bits;\n          bits += 8;\n          //---//\n        }\n        if ((here_op & 0xf0) === 0) {\n          last_bits = here_bits;\n          last_op = here_op;\n          last_val = here_val;\n          for (;;) {\n            here = state.distcode[last_val +\n                    ((hold & ((1 << (last_bits + last_op)) - 1))/*BITS(last.bits + last.op)*/ >> last_bits)];\n            here_bits = here >>> 24;\n            here_op = (here >>> 16) & 0xff;\n            here_val = here & 0xffff;\n\n            if ((last_bits + here_bits) <= bits) { break; }\n            //--- PULLBYTE() ---//\n            if (have === 0) { break inf_leave; }\n            have--;\n            hold += input[next++] << bits;\n            bits += 8;\n            //---//\n          }\n          //--- DROPBITS(last.bits) ---//\n          hold >>>= last_bits;\n          bits -= last_bits;\n          //---//\n          state.back += last_bits;\n        }\n        //--- DROPBITS(here.bits) ---//\n        hold >>>= here_bits;\n        bits -= here_bits;\n        //---//\n        state.back += here_bits;\n        if (here_op & 64) {\n          strm.msg = 'invalid distance code';\n          state.mode = BAD;\n          break;\n        }\n        state.offset = here_val;\n        state.extra = (here_op) & 15;\n        state.mode = DISTEXT;\n        /* falls through */\n      case DISTEXT:\n        if (state.extra) {\n          //=== NEEDBITS(state.extra);\n          n = state.extra;\n          while (bits < n) {\n            if (have === 0) { break inf_leave; }\n            have--;\n            hold += input[next++] << bits;\n            bits += 8;\n          }\n          //===//\n          state.offset += hold & ((1 << state.extra) - 1)/*BITS(state.extra)*/;\n          //--- DROPBITS(state.extra) ---//\n          hold >>>= state.extra;\n          bits -= state.extra;\n          //---//\n          state.back += state.extra;\n        }\n//#ifdef INFLATE_STRICT\n        if (state.offset > state.dmax) {\n          strm.msg = 'invalid distance too far back';\n          state.mode = BAD;\n          break;\n        }\n//#endif\n        //Tracevv((stderr, \"inflate:         distance %u\\n\", state.offset));\n        state.mode = MATCH;\n        /* falls through */\n      case MATCH:\n        if (left === 0) { break inf_leave; }\n        copy = _out - left;\n        if (state.offset > copy) {         /* copy from window */\n          copy = state.offset - copy;\n          if (copy > state.whave) {\n            if (state.sane) {\n              strm.msg = 'invalid distance too far back';\n              state.mode = BAD;\n              break;\n            }\n// (!) This block is disabled in zlib defaults,\n// don't enable it for binary compatibility\n//#ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR\n//          Trace((stderr, \"inflate.c too far\\n\"));\n//          copy -= state.whave;\n//          if (copy > state.length) { copy = state.length; }\n//          if (copy > left) { copy = left; }\n//          left -= copy;\n//          state.length -= copy;\n//          do {\n//            output[put++] = 0;\n//          } while (--copy);\n//          if (state.length === 0) { state.mode = LEN; }\n//          break;\n//#endif\n          }\n          if (copy > state.wnext) {\n            copy -= state.wnext;\n            from = state.wsize - copy;\n          }\n          else {\n            from = state.wnext - copy;\n          }\n          if (copy > state.length) { copy = state.length; }\n          from_source = state.window;\n        }\n        else {                              /* copy from output */\n          from_source = output;\n          from = put - state.offset;\n          copy = state.length;\n        }\n        if (copy > left) { copy = left; }\n        left -= copy;\n        state.length -= copy;\n        do {\n          output[put++] = from_source[from++];\n        } while (--copy);\n        if (state.length === 0) { state.mode = LEN; }\n        break;\n      case LIT:\n        if (left === 0) { break inf_leave; }\n        output[put++] = state.length;\n        left--;\n        state.mode = LEN;\n        break;\n      case CHECK:\n        if (state.wrap) {\n          //=== NEEDBITS(32);\n          while (bits < 32) {\n            if (have === 0) { break inf_leave; }\n            have--;\n            // Use '|' instead of '+' to make sure that result is signed\n            hold |= input[next++] << bits;\n            bits += 8;\n          }\n          //===//\n          _out -= left;\n          strm.total_out += _out;\n          state.total += _out;\n          if (_out) {\n            strm.adler = state.check =\n                /*UPDATE(state.check, put - _out, _out);*/\n                (state.flags ? crc32(state.check, output, _out, put - _out) : adler32(state.check, output, _out, put - _out));\n\n          }\n          _out = left;\n          // NB: crc32 stored as signed 32-bit int, zswap32 returns signed too\n          if ((state.flags ? hold : zswap32(hold)) !== state.check) {\n            strm.msg = 'incorrect data check';\n            state.mode = BAD;\n            break;\n          }\n          //=== INITBITS();\n          hold = 0;\n          bits = 0;\n          //===//\n          //Tracev((stderr, \"inflate:   check matches trailer\\n\"));\n        }\n        state.mode = LENGTH;\n        /* falls through */\n      case LENGTH:\n        if (state.wrap && state.flags) {\n          //=== NEEDBITS(32);\n          while (bits < 32) {\n            if (have === 0) { break inf_leave; }\n            have--;\n            hold += input[next++] << bits;\n            bits += 8;\n          }\n          //===//\n          if (hold !== (state.total & 0xffffffff)) {\n            strm.msg = 'incorrect length check';\n            state.mode = BAD;\n            break;\n          }\n          //=== INITBITS();\n          hold = 0;\n          bits = 0;\n          //===//\n          //Tracev((stderr, \"inflate:   length matches trailer\\n\"));\n        }\n        state.mode = DONE;\n        /* falls through */\n      case DONE:\n        ret = Z_STREAM_END;\n        break inf_leave;\n      case BAD:\n        ret = Z_DATA_ERROR;\n        break inf_leave;\n      case MEM:\n        return Z_MEM_ERROR;\n      case SYNC:\n        /* falls through */\n      default:\n        return Z_STREAM_ERROR;\n    }\n  }\n\n  // inf_leave <- here is real place for \"goto inf_leave\", emulated via \"break inf_leave\"\n\n  /*\n     Return from inflate(), updating the total counts and the check value.\n     If there was no progress during the inflate() call, return a buffer\n     error.  Call updatewindow() to create and/or update the window state.\n     Note: a memory error from inflate() is non-recoverable.\n   */\n\n  //--- RESTORE() ---\n  strm.next_out = put;\n  strm.avail_out = left;\n  strm.next_in = next;\n  strm.avail_in = have;\n  state.hold = hold;\n  state.bits = bits;\n  //---\n\n  if (state.wsize || (_out !== strm.avail_out && state.mode < BAD &&\n                      (state.mode < CHECK || flush !== Z_FINISH))) {\n    if (updatewindow(strm, strm.output, strm.next_out, _out - strm.avail_out)) {\n      state.mode = MEM;\n      return Z_MEM_ERROR;\n    }\n  }\n  _in -= strm.avail_in;\n  _out -= strm.avail_out;\n  strm.total_in += _in;\n  strm.total_out += _out;\n  state.total += _out;\n  if (state.wrap && _out) {\n    strm.adler = state.check = /*UPDATE(state.check, strm.next_out - _out, _out);*/\n      (state.flags ? crc32(state.check, output, _out, strm.next_out - _out) : adler32(state.check, output, _out, strm.next_out - _out));\n  }\n  strm.data_type = state.bits + (state.last ? 64 : 0) +\n                    (state.mode === TYPE ? 128 : 0) +\n                    (state.mode === LEN_ || state.mode === COPY_ ? 256 : 0);\n  if (((_in === 0 && _out === 0) || flush === Z_FINISH) && ret === Z_OK) {\n    ret = Z_BUF_ERROR;\n  }\n  return ret;\n}\n\nfunction inflateEnd(strm) {\n\n  if (!strm || !strm.state /*|| strm->zfree == (free_func)0*/) {\n    return Z_STREAM_ERROR;\n  }\n\n  var state = strm.state;\n  if (state.window) {\n    state.window = null;\n  }\n  strm.state = null;\n  return Z_OK;\n}\n\nfunction inflateGetHeader(strm, head) {\n  var state;\n\n  /* check state */\n  if (!strm || !strm.state) { return Z_STREAM_ERROR; }\n  state = strm.state;\n  if ((state.wrap & 2) === 0) { return Z_STREAM_ERROR; }\n\n  /* save header structure */\n  state.head = head;\n  head.done = false;\n  return Z_OK;\n}\n\nfunction inflateSetDictionary(strm, dictionary) {\n  var dictLength = dictionary.length;\n\n  var state;\n  var dictid;\n  var ret;\n\n  /* check state */\n  if (!strm /* == Z_NULL */ || !strm.state /* == Z_NULL */) { return Z_STREAM_ERROR; }\n  state = strm.state;\n\n  if (state.wrap !== 0 && state.mode !== DICT) {\n    return Z_STREAM_ERROR;\n  }\n\n  /* check for correct dictionary identifier */\n  if (state.mode === DICT) {\n    dictid = 1; /* adler32(0, null, 0)*/\n    /* dictid = adler32(dictid, dictionary, dictLength); */\n    dictid = adler32(dictid, dictionary, dictLength, 0);\n    if (dictid !== state.check) {\n      return Z_DATA_ERROR;\n    }\n  }\n  /* copy dictionary to window using updatewindow(), which will amend the\n   existing dictionary if appropriate */\n  ret = updatewindow(strm, dictionary, dictLength, dictLength);\n  if (ret) {\n    state.mode = MEM;\n    return Z_MEM_ERROR;\n  }\n  state.havedict = 1;\n  // Tracev((stderr, \"inflate:   dictionary set\\n\"));\n  return Z_OK;\n}\n\nexports.inflateReset = inflateReset;\nexports.inflateReset2 = inflateReset2;\nexports.inflateResetKeep = inflateResetKeep;\nexports.inflateInit = inflateInit;\nexports.inflateInit2 = inflateInit2;\nexports.inflate = inflate;\nexports.inflateEnd = inflateEnd;\nexports.inflateGetHeader = inflateGetHeader;\nexports.inflateSetDictionary = inflateSetDictionary;\nexports.inflateInfo = 'pako inflate (from Nodeca project)';\n\n/* Not implemented\nexports.inflateCopy = inflateCopy;\nexports.inflateGetDictionary = inflateGetDictionary;\nexports.inflateMark = inflateMark;\nexports.inflatePrime = inflatePrime;\nexports.inflateSync = inflateSync;\nexports.inflateSyncPoint = inflateSyncPoint;\nexports.inflateUndermine = inflateUndermine;\n*/\n","'use strict';\n\n// (C) 1995-2013 Jean-loup Gailly and Mark Adler\n// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin\n//\n// This software is provided 'as-is', without any express or implied\n// warranty. In no event will the authors be held liable for any damages\n// arising from the use of this software.\n//\n// Permission is granted to anyone to use this software for any purpose,\n// including commercial applications, and to alter it and redistribute it\n// freely, subject to the following restrictions:\n//\n// 1. The origin of this software must not be misrepresented; you must not\n//   claim that you wrote the original software. If you use this software\n//   in a product, an acknowledgment in the product documentation would be\n//   appreciated but is not required.\n// 2. Altered source versions must be plainly marked as such, and must not be\n//   misrepresented as being the original software.\n// 3. This notice may not be removed or altered from any source distribution.\n\nvar utils = require('../utils/common');\n\nvar MAXBITS = 15;\nvar ENOUGH_LENS = 852;\nvar ENOUGH_DISTS = 592;\n//var ENOUGH = (ENOUGH_LENS+ENOUGH_DISTS);\n\nvar CODES = 0;\nvar LENS = 1;\nvar DISTS = 2;\n\nvar lbase = [ /* Length codes 257..285 base */\n  3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,\n  35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0\n];\n\nvar lext = [ /* Length codes 257..285 extra */\n  16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,\n  19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 72, 78\n];\n\nvar dbase = [ /* Distance codes 0..29 base */\n  1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,\n  257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,\n  8193, 12289, 16385, 24577, 0, 0\n];\n\nvar dext = [ /* Distance codes 0..29 extra */\n  16, 16, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22,\n  23, 23, 24, 24, 25, 25, 26, 26, 27, 27,\n  28, 28, 29, 29, 64, 64\n];\n\nmodule.exports = function inflate_table(type, lens, lens_index, codes, table, table_index, work, opts)\n{\n  var bits = opts.bits;\n      //here = opts.here; /* table entry for duplication */\n\n  var len = 0;               /* a code's length in bits */\n  var sym = 0;               /* index of code symbols */\n  var min = 0, max = 0;          /* minimum and maximum code lengths */\n  var root = 0;              /* number of index bits for root table */\n  var curr = 0;              /* number of index bits for current table */\n  var drop = 0;              /* code bits to drop for sub-table */\n  var left = 0;                   /* number of prefix codes available */\n  var used = 0;              /* code entries in table used */\n  var huff = 0;              /* Huffman code */\n  var incr;              /* for incrementing code, index */\n  var fill;              /* index for replicating entries */\n  var low;               /* low bits for current root entry */\n  var mask;              /* mask for low root bits */\n  var next;             /* next available space in table */\n  var base = null;     /* base value table to use */\n  var base_index = 0;\n//  var shoextra;    /* extra bits table to use */\n  var end;                    /* use base and extra for symbol > end */\n  var count = new utils.Buf16(MAXBITS + 1); //[MAXBITS+1];    /* number of codes of each length */\n  var offs = new utils.Buf16(MAXBITS + 1); //[MAXBITS+1];     /* offsets in table for each length */\n  var extra = null;\n  var extra_index = 0;\n\n  var here_bits, here_op, here_val;\n\n  /*\n   Process a set of code lengths to create a canonical Huffman code.  The\n   code lengths are lens[0..codes-1].  Each length corresponds to the\n   symbols 0..codes-1.  The Huffman code is generated by first sorting the\n   symbols by length from short to long, and retaining the symbol order\n   for codes with equal lengths.  Then the code starts with all zero bits\n   for the first code of the shortest length, and the codes are integer\n   increments for the same length, and zeros are appended as the length\n   increases.  For the deflate format, these bits are stored backwards\n   from their more natural integer increment ordering, and so when the\n   decoding tables are built in the large loop below, the integer codes\n   are incremented backwards.\n\n   This routine assumes, but does not check, that all of the entries in\n   lens[] are in the range 0..MAXBITS.  The caller must assure this.\n   1..MAXBITS is interpreted as that code length.  zero means that that\n   symbol does not occur in this code.\n\n   The codes are sorted by computing a count of codes for each length,\n   creating from that a table of starting indices for each length in the\n   sorted table, and then entering the symbols in order in the sorted\n   table.  The sorted table is work[], with that space being provided by\n   the caller.\n\n   The length counts are used for other purposes as well, i.e. finding\n   the minimum and maximum length codes, determining if there are any\n   codes at all, checking for a valid set of lengths, and looking ahead\n   at length counts to determine sub-table sizes when building the\n   decoding tables.\n   */\n\n  /* accumulate lengths for codes (assumes lens[] all in 0..MAXBITS) */\n  for (len = 0; len <= MAXBITS; len++) {\n    count[len] = 0;\n  }\n  for (sym = 0; sym < codes; sym++) {\n    count[lens[lens_index + sym]]++;\n  }\n\n  /* bound code lengths, force root to be within code lengths */\n  root = bits;\n  for (max = MAXBITS; max >= 1; max--) {\n    if (count[max] !== 0) { break; }\n  }\n  if (root > max) {\n    root = max;\n  }\n  if (max === 0) {                     /* no symbols to code at all */\n    //table.op[opts.table_index] = 64;  //here.op = (var char)64;    /* invalid code marker */\n    //table.bits[opts.table_index] = 1;   //here.bits = (var char)1;\n    //table.val[opts.table_index++] = 0;   //here.val = (var short)0;\n    table[table_index++] = (1 << 24) | (64 << 16) | 0;\n\n\n    //table.op[opts.table_index] = 64;\n    //table.bits[opts.table_index] = 1;\n    //table.val[opts.table_index++] = 0;\n    table[table_index++] = (1 << 24) | (64 << 16) | 0;\n\n    opts.bits = 1;\n    return 0;     /* no symbols, but wait for decoding to report error */\n  }\n  for (min = 1; min < max; min++) {\n    if (count[min] !== 0) { break; }\n  }\n  if (root < min) {\n    root = min;\n  }\n\n  /* check for an over-subscribed or incomplete set of lengths */\n  left = 1;\n  for (len = 1; len <= MAXBITS; len++) {\n    left <<= 1;\n    left -= count[len];\n    if (left < 0) {\n      return -1;\n    }        /* over-subscribed */\n  }\n  if (left > 0 && (type === CODES || max !== 1)) {\n    return -1;                      /* incomplete set */\n  }\n\n  /* generate offsets into symbol table for each length for sorting */\n  offs[1] = 0;\n  for (len = 1; len < MAXBITS; len++) {\n    offs[len + 1] = offs[len] + count[len];\n  }\n\n  /* sort symbols by length, by symbol order within each length */\n  for (sym = 0; sym < codes; sym++) {\n    if (lens[lens_index + sym] !== 0) {\n      work[offs[lens[lens_index + sym]]++] = sym;\n    }\n  }\n\n  /*\n   Create and fill in decoding tables.  In this loop, the table being\n   filled is at next and has curr index bits.  The code being used is huff\n   with length len.  That code is converted to an index by dropping drop\n   bits off of the bottom.  For codes where len is less than drop + curr,\n   those top drop + curr - len bits are incremented through all values to\n   fill the table with replicated entries.\n\n   root is the number of index bits for the root table.  When len exceeds\n   root, sub-tables are created pointed to by the root entry with an index\n   of the low root bits of huff.  This is saved in low to check for when a\n   new sub-table should be started.  drop is zero when the root table is\n   being filled, and drop is root when sub-tables are being filled.\n\n   When a new sub-table is needed, it is necessary to look ahead in the\n   code lengths to determine what size sub-table is needed.  The length\n   counts are used for this, and so count[] is decremented as codes are\n   entered in the tables.\n\n   used keeps track of how many table entries have been allocated from the\n   provided *table space.  It is checked for LENS and DIST tables against\n   the constants ENOUGH_LENS and ENOUGH_DISTS to guard against changes in\n   the initial root table size constants.  See the comments in inftrees.h\n   for more information.\n\n   sym increments through all symbols, and the loop terminates when\n   all codes of length max, i.e. all codes, have been processed.  This\n   routine permits incomplete codes, so another loop after this one fills\n   in the rest of the decoding tables with invalid code markers.\n   */\n\n  /* set up for code type */\n  // poor man optimization - use if-else instead of switch,\n  // to avoid deopts in old v8\n  if (type === CODES) {\n    base = extra = work;    /* dummy value--not used */\n    end = 19;\n\n  } else if (type === LENS) {\n    base = lbase;\n    base_index -= 257;\n    extra = lext;\n    extra_index -= 257;\n    end = 256;\n\n  } else {                    /* DISTS */\n    base = dbase;\n    extra = dext;\n    end = -1;\n  }\n\n  /* initialize opts for loop */\n  huff = 0;                   /* starting code */\n  sym = 0;                    /* starting code symbol */\n  len = min;                  /* starting code length */\n  next = table_index;              /* current table to fill in */\n  curr = root;                /* current table index bits */\n  drop = 0;                   /* current bits to drop from code for index */\n  low = -1;                   /* trigger new sub-table when len > root */\n  used = 1 << root;          /* use root table entries */\n  mask = used - 1;            /* mask for comparing low */\n\n  /* check available table space */\n  if ((type === LENS && used > ENOUGH_LENS) ||\n    (type === DISTS && used > ENOUGH_DISTS)) {\n    return 1;\n  }\n\n  /* process all codes and make table entries */\n  for (;;) {\n    /* create table entry */\n    here_bits = len - drop;\n    if (work[sym] < end) {\n      here_op = 0;\n      here_val = work[sym];\n    }\n    else if (work[sym] > end) {\n      here_op = extra[extra_index + work[sym]];\n      here_val = base[base_index + work[sym]];\n    }\n    else {\n      here_op = 32 + 64;         /* end of block */\n      here_val = 0;\n    }\n\n    /* replicate for those indices with low len bits equal to huff */\n    incr = 1 << (len - drop);\n    fill = 1 << curr;\n    min = fill;                 /* save offset to next table */\n    do {\n      fill -= incr;\n      table[next + (huff >> drop) + fill] = (here_bits << 24) | (here_op << 16) | here_val |0;\n    } while (fill !== 0);\n\n    /* backwards increment the len-bit code huff */\n    incr = 1 << (len - 1);\n    while (huff & incr) {\n      incr >>= 1;\n    }\n    if (incr !== 0) {\n      huff &= incr - 1;\n      huff += incr;\n    } else {\n      huff = 0;\n    }\n\n    /* go to next symbol, update count, len */\n    sym++;\n    if (--count[len] === 0) {\n      if (len === max) { break; }\n      len = lens[lens_index + work[sym]];\n    }\n\n    /* create new sub-table if needed */\n    if (len > root && (huff & mask) !== low) {\n      /* if first time, transition to sub-tables */\n      if (drop === 0) {\n        drop = root;\n      }\n\n      /* increment past last table */\n      next += min;            /* here min is 1 << curr */\n\n      /* determine length of next table */\n      curr = len - drop;\n      left = 1 << curr;\n      while (curr + drop < max) {\n        left -= count[curr + drop];\n        if (left <= 0) { break; }\n        curr++;\n        left <<= 1;\n      }\n\n      /* check for enough space */\n      used += 1 << curr;\n      if ((type === LENS && used > ENOUGH_LENS) ||\n        (type === DISTS && used > ENOUGH_DISTS)) {\n        return 1;\n      }\n\n      /* point entry in root table to sub-table */\n      low = huff & mask;\n      /*table.op[low] = curr;\n      table.bits[low] = root;\n      table.val[low] = next - opts.table_index;*/\n      table[low] = (root << 24) | (curr << 16) | (next - table_index) |0;\n    }\n  }\n\n  /* fill in remaining table entry if code is incomplete (guaranteed to have\n   at most one remaining entry, since if the code is incomplete, the\n   maximum code length that was allowed to get this far is one bit) */\n  if (huff !== 0) {\n    //table.op[next + huff] = 64;            /* invalid code marker */\n    //table.bits[next + huff] = len - drop;\n    //table.val[next + huff] = 0;\n    table[next + huff] = ((len - drop) << 24) | (64 << 16) |0;\n  }\n\n  /* set return parameters */\n  //opts.table_index += used;\n  opts.bits = root;\n  return 0;\n};\n","'use strict';\n\n// (C) 1995-2013 Jean-loup Gailly and Mark Adler\n// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin\n//\n// This software is provided 'as-is', without any express or implied\n// warranty. In no event will the authors be held liable for any damages\n// arising from the use of this software.\n//\n// Permission is granted to anyone to use this software for any purpose,\n// including commercial applications, and to alter it and redistribute it\n// freely, subject to the following restrictions:\n//\n// 1. The origin of this software must not be misrepresented; you must not\n//   claim that you wrote the original software. If you use this software\n//   in a product, an acknowledgment in the product documentation would be\n//   appreciated but is not required.\n// 2. Altered source versions must be plainly marked as such, and must not be\n//   misrepresented as being the original software.\n// 3. This notice may not be removed or altered from any source distribution.\n\nmodule.exports = {\n  2:      'need dictionary',     /* Z_NEED_DICT       2  */\n  1:      'stream end',          /* Z_STREAM_END      1  */\n  0:      '',                    /* Z_OK              0  */\n  '-1':   'file error',          /* Z_ERRNO         (-1) */\n  '-2':   'stream error',        /* Z_STREAM_ERROR  (-2) */\n  '-3':   'data error',          /* Z_DATA_ERROR    (-3) */\n  '-4':   'insufficient memory', /* Z_MEM_ERROR     (-4) */\n  '-5':   'buffer error',        /* Z_BUF_ERROR     (-5) */\n  '-6':   'incompatible version' /* Z_VERSION_ERROR (-6) */\n};\n","'use strict';\n\n// (C) 1995-2013 Jean-loup Gailly and Mark Adler\n// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin\n//\n// This software is provided 'as-is', without any express or implied\n// warranty. In no event will the authors be held liable for any damages\n// arising from the use of this software.\n//\n// Permission is granted to anyone to use this software for any purpose,\n// including commercial applications, and to alter it and redistribute it\n// freely, subject to the following restrictions:\n//\n// 1. The origin of this software must not be misrepresented; you must not\n//   claim that you wrote the original software. If you use this software\n//   in a product, an acknowledgment in the product documentation would be\n//   appreciated but is not required.\n// 2. Altered source versions must be plainly marked as such, and must not be\n//   misrepresented as being the original software.\n// 3. This notice may not be removed or altered from any source distribution.\n\n/* eslint-disable space-unary-ops */\n\nvar utils = require('../utils/common');\n\n/* Public constants ==========================================================*/\n/* ===========================================================================*/\n\n\n//var Z_FILTERED          = 1;\n//var Z_HUFFMAN_ONLY      = 2;\n//var Z_RLE               = 3;\nvar Z_FIXED               = 4;\n//var Z_DEFAULT_STRATEGY  = 0;\n\n/* Possible values of the data_type field (though see inflate()) */\nvar Z_BINARY              = 0;\nvar Z_TEXT                = 1;\n//var Z_ASCII             = 1; // = Z_TEXT\nvar Z_UNKNOWN             = 2;\n\n/*============================================================================*/\n\n\nfunction zero(buf) { var len = buf.length; while (--len >= 0) { buf[len] = 0; } }\n\n// From zutil.h\n\nvar STORED_BLOCK = 0;\nvar STATIC_TREES = 1;\nvar DYN_TREES    = 2;\n/* The three kinds of block type */\n\nvar MIN_MATCH    = 3;\nvar MAX_MATCH    = 258;\n/* The minimum and maximum match lengths */\n\n// From deflate.h\n/* ===========================================================================\n * Internal compression state.\n */\n\nvar LENGTH_CODES  = 29;\n/* number of length codes, not counting the special END_BLOCK code */\n\nvar LITERALS      = 256;\n/* number of literal bytes 0..255 */\n\nvar L_CODES       = LITERALS + 1 + LENGTH_CODES;\n/* number of Literal or Length codes, including the END_BLOCK code */\n\nvar D_CODES       = 30;\n/* number of distance codes */\n\nvar BL_CODES      = 19;\n/* number of codes used to transfer the bit lengths */\n\nvar HEAP_SIZE     = 2 * L_CODES + 1;\n/* maximum heap size */\n\nvar MAX_BITS      = 15;\n/* All codes must not exceed MAX_BITS bits */\n\nvar Buf_size      = 16;\n/* size of bit buffer in bi_buf */\n\n\n/* ===========================================================================\n * Constants\n */\n\nvar MAX_BL_BITS = 7;\n/* Bit length codes must not exceed MAX_BL_BITS bits */\n\nvar END_BLOCK   = 256;\n/* end of block literal code */\n\nvar REP_3_6     = 16;\n/* repeat previous bit length 3-6 times (2 bits of repeat count) */\n\nvar REPZ_3_10   = 17;\n/* repeat a zero length 3-10 times  (3 bits of repeat count) */\n\nvar REPZ_11_138 = 18;\n/* repeat a zero length 11-138 times  (7 bits of repeat count) */\n\n/* eslint-disable comma-spacing,array-bracket-spacing */\nvar extra_lbits =   /* extra bits for each length code */\n  [0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0];\n\nvar extra_dbits =   /* extra bits for each distance code */\n  [0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13];\n\nvar extra_blbits =  /* extra bits for each bit length code */\n  [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,3,7];\n\nvar bl_order =\n  [16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15];\n/* eslint-enable comma-spacing,array-bracket-spacing */\n\n/* The lengths of the bit length codes are sent in order of decreasing\n * probability, to avoid transmitting the lengths for unused bit length codes.\n */\n\n/* ===========================================================================\n * Local data. These are initialized only once.\n */\n\n// We pre-fill arrays with 0 to avoid uninitialized gaps\n\nvar DIST_CODE_LEN = 512; /* see definition of array dist_code below */\n\n// !!!! Use flat array instead of structure, Freq = i*2, Len = i*2+1\nvar static_ltree  = new Array((L_CODES + 2) * 2);\nzero(static_ltree);\n/* The static literal tree. Since the bit lengths are imposed, there is no\n * need for the L_CODES extra codes used during heap construction. However\n * The codes 286 and 287 are needed to build a canonical tree (see _tr_init\n * below).\n */\n\nvar static_dtree  = new Array(D_CODES * 2);\nzero(static_dtree);\n/* The static distance tree. (Actually a trivial tree since all codes use\n * 5 bits.)\n */\n\nvar _dist_code    = new Array(DIST_CODE_LEN);\nzero(_dist_code);\n/* Distance codes. The first 256 values correspond to the distances\n * 3 .. 258, the last 256 values correspond to the top 8 bits of\n * the 15 bit distances.\n */\n\nvar _length_code  = new Array(MAX_MATCH - MIN_MATCH + 1);\nzero(_length_code);\n/* length code for each normalized match length (0 == MIN_MATCH) */\n\nvar base_length   = new Array(LENGTH_CODES);\nzero(base_length);\n/* First normalized length for each code (0 = MIN_MATCH) */\n\nvar base_dist     = new Array(D_CODES);\nzero(base_dist);\n/* First normalized distance for each code (0 = distance of 1) */\n\n\nfunction StaticTreeDesc(static_tree, extra_bits, extra_base, elems, max_length) {\n\n  this.static_tree  = static_tree;  /* static tree or NULL */\n  this.extra_bits   = extra_bits;   /* extra bits for each code or NULL */\n  this.extra_base   = extra_base;   /* base index for extra_bits */\n  this.elems        = elems;        /* max number of elements in the tree */\n  this.max_length   = max_length;   /* max bit length for the codes */\n\n  // show if `static_tree` has data or dummy - needed for monomorphic objects\n  this.has_stree    = static_tree && static_tree.length;\n}\n\n\nvar static_l_desc;\nvar static_d_desc;\nvar static_bl_desc;\n\n\nfunction TreeDesc(dyn_tree, stat_desc) {\n  this.dyn_tree = dyn_tree;     /* the dynamic tree */\n  this.max_code = 0;            /* largest code with non zero frequency */\n  this.stat_desc = stat_desc;   /* the corresponding static tree */\n}\n\n\n\nfunction d_code(dist) {\n  return dist < 256 ? _dist_code[dist] : _dist_code[256 + (dist >>> 7)];\n}\n\n\n/* ===========================================================================\n * Output a short LSB first on the stream.\n * IN assertion: there is enough room in pendingBuf.\n */\nfunction put_short(s, w) {\n//    put_byte(s, (uch)((w) & 0xff));\n//    put_byte(s, (uch)((ush)(w) >> 8));\n  s.pending_buf[s.pending++] = (w) & 0xff;\n  s.pending_buf[s.pending++] = (w >>> 8) & 0xff;\n}\n\n\n/* ===========================================================================\n * Send a value on a given number of bits.\n * IN assertion: length <= 16 and value fits in length bits.\n */\nfunction send_bits(s, value, length) {\n  if (s.bi_valid > (Buf_size - length)) {\n    s.bi_buf |= (value << s.bi_valid) & 0xffff;\n    put_short(s, s.bi_buf);\n    s.bi_buf = value >> (Buf_size - s.bi_valid);\n    s.bi_valid += length - Buf_size;\n  } else {\n    s.bi_buf |= (value << s.bi_valid) & 0xffff;\n    s.bi_valid += length;\n  }\n}\n\n\nfunction send_code(s, c, tree) {\n  send_bits(s, tree[c * 2]/*.Code*/, tree[c * 2 + 1]/*.Len*/);\n}\n\n\n/* ===========================================================================\n * Reverse the first len bits of a code, using straightforward code (a faster\n * method would use a table)\n * IN assertion: 1 <= len <= 15\n */\nfunction bi_reverse(code, len) {\n  var res = 0;\n  do {\n    res |= code & 1;\n    code >>>= 1;\n    res <<= 1;\n  } while (--len > 0);\n  return res >>> 1;\n}\n\n\n/* ===========================================================================\n * Flush the bit buffer, keeping at most 7 bits in it.\n */\nfunction bi_flush(s) {\n  if (s.bi_valid === 16) {\n    put_short(s, s.bi_buf);\n    s.bi_buf = 0;\n    s.bi_valid = 0;\n\n  } else if (s.bi_valid >= 8) {\n    s.pending_buf[s.pending++] = s.bi_buf & 0xff;\n    s.bi_buf >>= 8;\n    s.bi_valid -= 8;\n  }\n}\n\n\n/* ===========================================================================\n * Compute the optimal bit lengths for a tree and update the total bit length\n * for the current block.\n * IN assertion: the fields freq and dad are set, heap[heap_max] and\n *    above are the tree nodes sorted by increasing frequency.\n * OUT assertions: the field len is set to the optimal bit length, the\n *     array bl_count contains the frequencies for each bit length.\n *     The length opt_len is updated; static_len is also updated if stree is\n *     not null.\n */\nfunction gen_bitlen(s, desc)\n//    deflate_state *s;\n//    tree_desc *desc;    /* the tree descriptor */\n{\n  var tree            = desc.dyn_tree;\n  var max_code        = desc.max_code;\n  var stree           = desc.stat_desc.static_tree;\n  var has_stree       = desc.stat_desc.has_stree;\n  var extra           = desc.stat_desc.extra_bits;\n  var base            = desc.stat_desc.extra_base;\n  var max_length      = desc.stat_desc.max_length;\n  var h;              /* heap index */\n  var n, m;           /* iterate over the tree elements */\n  var bits;           /* bit length */\n  var xbits;          /* extra bits */\n  var f;              /* frequency */\n  var overflow = 0;   /* number of elements with bit length too large */\n\n  for (bits = 0; bits <= MAX_BITS; bits++) {\n    s.bl_count[bits] = 0;\n  }\n\n  /* In a first pass, compute the optimal bit lengths (which may\n   * overflow in the case of the bit length tree).\n   */\n  tree[s.heap[s.heap_max] * 2 + 1]/*.Len*/ = 0; /* root of the heap */\n\n  for (h = s.heap_max + 1; h < HEAP_SIZE; h++) {\n    n = s.heap[h];\n    bits = tree[tree[n * 2 + 1]/*.Dad*/ * 2 + 1]/*.Len*/ + 1;\n    if (bits > max_length) {\n      bits = max_length;\n      overflow++;\n    }\n    tree[n * 2 + 1]/*.Len*/ = bits;\n    /* We overwrite tree[n].Dad which is no longer needed */\n\n    if (n > max_code) { continue; } /* not a leaf node */\n\n    s.bl_count[bits]++;\n    xbits = 0;\n    if (n >= base) {\n      xbits = extra[n - base];\n    }\n    f = tree[n * 2]/*.Freq*/;\n    s.opt_len += f * (bits + xbits);\n    if (has_stree) {\n      s.static_len += f * (stree[n * 2 + 1]/*.Len*/ + xbits);\n    }\n  }\n  if (overflow === 0) { return; }\n\n  // Trace((stderr,\"\\nbit length overflow\\n\"));\n  /* This happens for example on obj2 and pic of the Calgary corpus */\n\n  /* Find the first bit length which could increase: */\n  do {\n    bits = max_length - 1;\n    while (s.bl_count[bits] === 0) { bits--; }\n    s.bl_count[bits]--;      /* move one leaf down the tree */\n    s.bl_count[bits + 1] += 2; /* move one overflow item as its brother */\n    s.bl_count[max_length]--;\n    /* The brother of the overflow item also moves one step up,\n     * but this does not affect bl_count[max_length]\n     */\n    overflow -= 2;\n  } while (overflow > 0);\n\n  /* Now recompute all bit lengths, scanning in increasing frequency.\n   * h is still equal to HEAP_SIZE. (It is simpler to reconstruct all\n   * lengths instead of fixing only the wrong ones. This idea is taken\n   * from 'ar' written by Haruhiko Okumura.)\n   */\n  for (bits = max_length; bits !== 0; bits--) {\n    n = s.bl_count[bits];\n    while (n !== 0) {\n      m = s.heap[--h];\n      if (m > max_code) { continue; }\n      if (tree[m * 2 + 1]/*.Len*/ !== bits) {\n        // Trace((stderr,\"code %d bits %d->%d\\n\", m, tree[m].Len, bits));\n        s.opt_len += (bits - tree[m * 2 + 1]/*.Len*/) * tree[m * 2]/*.Freq*/;\n        tree[m * 2 + 1]/*.Len*/ = bits;\n      }\n      n--;\n    }\n  }\n}\n\n\n/* ===========================================================================\n * Generate the codes for a given tree and bit counts (which need not be\n * optimal).\n * IN assertion: the array bl_count contains the bit length statistics for\n * the given tree and the field len is set for all tree elements.\n * OUT assertion: the field code is set for all tree elements of non\n *     zero code length.\n */\nfunction gen_codes(tree, max_code, bl_count)\n//    ct_data *tree;             /* the tree to decorate */\n//    int max_code;              /* largest code with non zero frequency */\n//    ushf *bl_count;            /* number of codes at each bit length */\n{\n  var next_code = new Array(MAX_BITS + 1); /* next code value for each bit length */\n  var code = 0;              /* running code value */\n  var bits;                  /* bit index */\n  var n;                     /* code index */\n\n  /* The distribution counts are first used to generate the code values\n   * without bit reversal.\n   */\n  for (bits = 1; bits <= MAX_BITS; bits++) {\n    next_code[bits] = code = (code + bl_count[bits - 1]) << 1;\n  }\n  /* Check that the bit counts in bl_count are consistent. The last code\n   * must be all ones.\n   */\n  //Assert (code + bl_count[MAX_BITS]-1 == (1<<MAX_BITS)-1,\n  //        \"inconsistent bit counts\");\n  //Tracev((stderr,\"\\ngen_codes: max_code %d \", max_code));\n\n  for (n = 0;  n <= max_code; n++) {\n    var len = tree[n * 2 + 1]/*.Len*/;\n    if (len === 0) { continue; }\n    /* Now reverse the bits */\n    tree[n * 2]/*.Code*/ = bi_reverse(next_code[len]++, len);\n\n    //Tracecv(tree != static_ltree, (stderr,\"\\nn %3d %c l %2d c %4x (%x) \",\n    //     n, (isgraph(n) ? n : ' '), len, tree[n].Code, next_code[len]-1));\n  }\n}\n\n\n/* ===========================================================================\n * Initialize the various 'constant' tables.\n */\nfunction tr_static_init() {\n  var n;        /* iterates over tree elements */\n  var bits;     /* bit counter */\n  var length;   /* length value */\n  var code;     /* code value */\n  var dist;     /* distance index */\n  var bl_count = new Array(MAX_BITS + 1);\n  /* number of codes at each bit length for an optimal tree */\n\n  // do check in _tr_init()\n  //if (static_init_done) return;\n\n  /* For some embedded targets, global variables are not initialized: */\n/*#ifdef NO_INIT_GLOBAL_POINTERS\n  static_l_desc.static_tree = static_ltree;\n  static_l_desc.extra_bits = extra_lbits;\n  static_d_desc.static_tree = static_dtree;\n  static_d_desc.extra_bits = extra_dbits;\n  static_bl_desc.extra_bits = extra_blbits;\n#endif*/\n\n  /* Initialize the mapping length (0..255) -> length code (0..28) */\n  length = 0;\n  for (code = 0; code < LENGTH_CODES - 1; code++) {\n    base_length[code] = length;\n    for (n = 0; n < (1 << extra_lbits[code]); n++) {\n      _length_code[length++] = code;\n    }\n  }\n  //Assert (length == 256, \"tr_static_init: length != 256\");\n  /* Note that the length 255 (match length 258) can be represented\n   * in two different ways: code 284 + 5 bits or code 285, so we\n   * overwrite length_code[255] to use the best encoding:\n   */\n  _length_code[length - 1] = code;\n\n  /* Initialize the mapping dist (0..32K) -> dist code (0..29) */\n  dist = 0;\n  for (code = 0; code < 16; code++) {\n    base_dist[code] = dist;\n    for (n = 0; n < (1 << extra_dbits[code]); n++) {\n      _dist_code[dist++] = code;\n    }\n  }\n  //Assert (dist == 256, \"tr_static_init: dist != 256\");\n  dist >>= 7; /* from now on, all distances are divided by 128 */\n  for (; code < D_CODES; code++) {\n    base_dist[code] = dist << 7;\n    for (n = 0; n < (1 << (extra_dbits[code] - 7)); n++) {\n      _dist_code[256 + dist++] = code;\n    }\n  }\n  //Assert (dist == 256, \"tr_static_init: 256+dist != 512\");\n\n  /* Construct the codes of the static literal tree */\n  for (bits = 0; bits <= MAX_BITS; bits++) {\n    bl_count[bits] = 0;\n  }\n\n  n = 0;\n  while (n <= 143) {\n    static_ltree[n * 2 + 1]/*.Len*/ = 8;\n    n++;\n    bl_count[8]++;\n  }\n  while (n <= 255) {\n    static_ltree[n * 2 + 1]/*.Len*/ = 9;\n    n++;\n    bl_count[9]++;\n  }\n  while (n <= 279) {\n    static_ltree[n * 2 + 1]/*.Len*/ = 7;\n    n++;\n    bl_count[7]++;\n  }\n  while (n <= 287) {\n    static_ltree[n * 2 + 1]/*.Len*/ = 8;\n    n++;\n    bl_count[8]++;\n  }\n  /* Codes 286 and 287 do not exist, but we must include them in the\n   * tree construction to get a canonical Huffman tree (longest code\n   * all ones)\n   */\n  gen_codes(static_ltree, L_CODES + 1, bl_count);\n\n  /* The static distance tree is trivial: */\n  for (n = 0; n < D_CODES; n++) {\n    static_dtree[n * 2 + 1]/*.Len*/ = 5;\n    static_dtree[n * 2]/*.Code*/ = bi_reverse(n, 5);\n  }\n\n  // Now data ready and we can init static trees\n  static_l_desc = new StaticTreeDesc(static_ltree, extra_lbits, LITERALS + 1, L_CODES, MAX_BITS);\n  static_d_desc = new StaticTreeDesc(static_dtree, extra_dbits, 0,          D_CODES, MAX_BITS);\n  static_bl_desc = new StaticTreeDesc(new Array(0), extra_blbits, 0,         BL_CODES, MAX_BL_BITS);\n\n  //static_init_done = true;\n}\n\n\n/* ===========================================================================\n * Initialize a new block.\n */\nfunction init_block(s) {\n  var n; /* iterates over tree elements */\n\n  /* Initialize the trees. */\n  for (n = 0; n < L_CODES;  n++) { s.dyn_ltree[n * 2]/*.Freq*/ = 0; }\n  for (n = 0; n < D_CODES;  n++) { s.dyn_dtree[n * 2]/*.Freq*/ = 0; }\n  for (n = 0; n < BL_CODES; n++) { s.bl_tree[n * 2]/*.Freq*/ = 0; }\n\n  s.dyn_ltree[END_BLOCK * 2]/*.Freq*/ = 1;\n  s.opt_len = s.static_len = 0;\n  s.last_lit = s.matches = 0;\n}\n\n\n/* ===========================================================================\n * Flush the bit buffer and align the output on a byte boundary\n */\nfunction bi_windup(s)\n{\n  if (s.bi_valid > 8) {\n    put_short(s, s.bi_buf);\n  } else if (s.bi_valid > 0) {\n    //put_byte(s, (Byte)s->bi_buf);\n    s.pending_buf[s.pending++] = s.bi_buf;\n  }\n  s.bi_buf = 0;\n  s.bi_valid = 0;\n}\n\n/* ===========================================================================\n * Copy a stored block, storing first the length and its\n * one's complement if requested.\n */\nfunction copy_block(s, buf, len, header)\n//DeflateState *s;\n//charf    *buf;    /* the input data */\n//unsigned len;     /* its length */\n//int      header;  /* true if block header must be written */\n{\n  bi_windup(s);        /* align on byte boundary */\n\n  if (header) {\n    put_short(s, len);\n    put_short(s, ~len);\n  }\n//  while (len--) {\n//    put_byte(s, *buf++);\n//  }\n  utils.arraySet(s.pending_buf, s.window, buf, len, s.pending);\n  s.pending += len;\n}\n\n/* ===========================================================================\n * Compares to subtrees, using the tree depth as tie breaker when\n * the subtrees have equal frequency. This minimizes the worst case length.\n */\nfunction smaller(tree, n, m, depth) {\n  var _n2 = n * 2;\n  var _m2 = m * 2;\n  return (tree[_n2]/*.Freq*/ < tree[_m2]/*.Freq*/ ||\n         (tree[_n2]/*.Freq*/ === tree[_m2]/*.Freq*/ && depth[n] <= depth[m]));\n}\n\n/* ===========================================================================\n * Restore the heap property by moving down the tree starting at node k,\n * exchanging a node with the smallest of its two sons if necessary, stopping\n * when the heap property is re-established (each father smaller than its\n * two sons).\n */\nfunction pqdownheap(s, tree, k)\n//    deflate_state *s;\n//    ct_data *tree;  /* the tree to restore */\n//    int k;               /* node to move down */\n{\n  var v = s.heap[k];\n  var j = k << 1;  /* left son of k */\n  while (j <= s.heap_len) {\n    /* Set j to the smallest of the two sons: */\n    if (j < s.heap_len &&\n      smaller(tree, s.heap[j + 1], s.heap[j], s.depth)) {\n      j++;\n    }\n    /* Exit if v is smaller than both sons */\n    if (smaller(tree, v, s.heap[j], s.depth)) { break; }\n\n    /* Exchange v with the smallest son */\n    s.heap[k] = s.heap[j];\n    k = j;\n\n    /* And continue down the tree, setting j to the left son of k */\n    j <<= 1;\n  }\n  s.heap[k] = v;\n}\n\n\n// inlined manually\n// var SMALLEST = 1;\n\n/* ===========================================================================\n * Send the block data compressed using the given Huffman trees\n */\nfunction compress_block(s, ltree, dtree)\n//    deflate_state *s;\n//    const ct_data *ltree; /* literal tree */\n//    const ct_data *dtree; /* distance tree */\n{\n  var dist;           /* distance of matched string */\n  var lc;             /* match length or unmatched char (if dist == 0) */\n  var lx = 0;         /* running index in l_buf */\n  var code;           /* the code to send */\n  var extra;          /* number of extra bits to send */\n\n  if (s.last_lit !== 0) {\n    do {\n      dist = (s.pending_buf[s.d_buf + lx * 2] << 8) | (s.pending_buf[s.d_buf + lx * 2 + 1]);\n      lc = s.pending_buf[s.l_buf + lx];\n      lx++;\n\n      if (dist === 0) {\n        send_code(s, lc, ltree); /* send a literal byte */\n        //Tracecv(isgraph(lc), (stderr,\" '%c' \", lc));\n      } else {\n        /* Here, lc is the match length - MIN_MATCH */\n        code = _length_code[lc];\n        send_code(s, code + LITERALS + 1, ltree); /* send the length code */\n        extra = extra_lbits[code];\n        if (extra !== 0) {\n          lc -= base_length[code];\n          send_bits(s, lc, extra);       /* send the extra length bits */\n        }\n        dist--; /* dist is now the match distance - 1 */\n        code = d_code(dist);\n        //Assert (code < D_CODES, \"bad d_code\");\n\n        send_code(s, code, dtree);       /* send the distance code */\n        extra = extra_dbits[code];\n        if (extra !== 0) {\n          dist -= base_dist[code];\n          send_bits(s, dist, extra);   /* send the extra distance bits */\n        }\n      } /* literal or match pair ? */\n\n      /* Check that the overlay between pending_buf and d_buf+l_buf is ok: */\n      //Assert((uInt)(s->pending) < s->lit_bufsize + 2*lx,\n      //       \"pendingBuf overflow\");\n\n    } while (lx < s.last_lit);\n  }\n\n  send_code(s, END_BLOCK, ltree);\n}\n\n\n/* ===========================================================================\n * Construct one Huffman tree and assigns the code bit strings and lengths.\n * Update the total bit length for the current block.\n * IN assertion: the field freq is set for all tree elements.\n * OUT assertions: the fields len and code are set to the optimal bit length\n *     and corresponding code. The length opt_len is updated; static_len is\n *     also updated if stree is not null. The field max_code is set.\n */\nfunction build_tree(s, desc)\n//    deflate_state *s;\n//    tree_desc *desc; /* the tree descriptor */\n{\n  var tree     = desc.dyn_tree;\n  var stree    = desc.stat_desc.static_tree;\n  var has_stree = desc.stat_desc.has_stree;\n  var elems    = desc.stat_desc.elems;\n  var n, m;          /* iterate over heap elements */\n  var max_code = -1; /* largest code with non zero frequency */\n  var node;          /* new node being created */\n\n  /* Construct the initial heap, with least frequent element in\n   * heap[SMALLEST]. The sons of heap[n] are heap[2*n] and heap[2*n+1].\n   * heap[0] is not used.\n   */\n  s.heap_len = 0;\n  s.heap_max = HEAP_SIZE;\n\n  for (n = 0; n < elems; n++) {\n    if (tree[n * 2]/*.Freq*/ !== 0) {\n      s.heap[++s.heap_len] = max_code = n;\n      s.depth[n] = 0;\n\n    } else {\n      tree[n * 2 + 1]/*.Len*/ = 0;\n    }\n  }\n\n  /* The pkzip format requires that at least one distance code exists,\n   * and that at least one bit should be sent even if there is only one\n   * possible code. So to avoid special checks later on we force at least\n   * two codes of non zero frequency.\n   */\n  while (s.heap_len < 2) {\n    node = s.heap[++s.heap_len] = (max_code < 2 ? ++max_code : 0);\n    tree[node * 2]/*.Freq*/ = 1;\n    s.depth[node] = 0;\n    s.opt_len--;\n\n    if (has_stree) {\n      s.static_len -= stree[node * 2 + 1]/*.Len*/;\n    }\n    /* node is 0 or 1 so it does not have extra bits */\n  }\n  desc.max_code = max_code;\n\n  /* The elements heap[heap_len/2+1 .. heap_len] are leaves of the tree,\n   * establish sub-heaps of increasing lengths:\n   */\n  for (n = (s.heap_len >> 1/*int /2*/); n >= 1; n--) { pqdownheap(s, tree, n); }\n\n  /* Construct the Huffman tree by repeatedly combining the least two\n   * frequent nodes.\n   */\n  node = elems;              /* next internal node of the tree */\n  do {\n    //pqremove(s, tree, n);  /* n = node of least frequency */\n    /*** pqremove ***/\n    n = s.heap[1/*SMALLEST*/];\n    s.heap[1/*SMALLEST*/] = s.heap[s.heap_len--];\n    pqdownheap(s, tree, 1/*SMALLEST*/);\n    /***/\n\n    m = s.heap[1/*SMALLEST*/]; /* m = node of next least frequency */\n\n    s.heap[--s.heap_max] = n; /* keep the nodes sorted by frequency */\n    s.heap[--s.heap_max] = m;\n\n    /* Create a new node father of n and m */\n    tree[node * 2]/*.Freq*/ = tree[n * 2]/*.Freq*/ + tree[m * 2]/*.Freq*/;\n    s.depth[node] = (s.depth[n] >= s.depth[m] ? s.depth[n] : s.depth[m]) + 1;\n    tree[n * 2 + 1]/*.Dad*/ = tree[m * 2 + 1]/*.Dad*/ = node;\n\n    /* and insert the new node in the heap */\n    s.heap[1/*SMALLEST*/] = node++;\n    pqdownheap(s, tree, 1/*SMALLEST*/);\n\n  } while (s.heap_len >= 2);\n\n  s.heap[--s.heap_max] = s.heap[1/*SMALLEST*/];\n\n  /* At this point, the fields freq and dad are set. We can now\n   * generate the bit lengths.\n   */\n  gen_bitlen(s, desc);\n\n  /* The field len is now set, we can generate the bit codes */\n  gen_codes(tree, max_code, s.bl_count);\n}\n\n\n/* ===========================================================================\n * Scan a literal or distance tree to determine the frequencies of the codes\n * in the bit length tree.\n */\nfunction scan_tree(s, tree, max_code)\n//    deflate_state *s;\n//    ct_data *tree;   /* the tree to be scanned */\n//    int max_code;    /* and its largest code of non zero frequency */\n{\n  var n;                     /* iterates over all tree elements */\n  var prevlen = -1;          /* last emitted length */\n  var curlen;                /* length of current code */\n\n  var nextlen = tree[0 * 2 + 1]/*.Len*/; /* length of next code */\n\n  var count = 0;             /* repeat count of the current code */\n  var max_count = 7;         /* max repeat count */\n  var min_count = 4;         /* min repeat count */\n\n  if (nextlen === 0) {\n    max_count = 138;\n    min_count = 3;\n  }\n  tree[(max_code + 1) * 2 + 1]/*.Len*/ = 0xffff; /* guard */\n\n  for (n = 0; n <= max_code; n++) {\n    curlen = nextlen;\n    nextlen = tree[(n + 1) * 2 + 1]/*.Len*/;\n\n    if (++count < max_count && curlen === nextlen) {\n      continue;\n\n    } else if (count < min_count) {\n      s.bl_tree[curlen * 2]/*.Freq*/ += count;\n\n    } else if (curlen !== 0) {\n\n      if (curlen !== prevlen) { s.bl_tree[curlen * 2]/*.Freq*/++; }\n      s.bl_tree[REP_3_6 * 2]/*.Freq*/++;\n\n    } else if (count <= 10) {\n      s.bl_tree[REPZ_3_10 * 2]/*.Freq*/++;\n\n    } else {\n      s.bl_tree[REPZ_11_138 * 2]/*.Freq*/++;\n    }\n\n    count = 0;\n    prevlen = curlen;\n\n    if (nextlen === 0) {\n      max_count = 138;\n      min_count = 3;\n\n    } else if (curlen === nextlen) {\n      max_count = 6;\n      min_count = 3;\n\n    } else {\n      max_count = 7;\n      min_count = 4;\n    }\n  }\n}\n\n\n/* ===========================================================================\n * Send a literal or distance tree in compressed form, using the codes in\n * bl_tree.\n */\nfunction send_tree(s, tree, max_code)\n//    deflate_state *s;\n//    ct_data *tree; /* the tree to be scanned */\n//    int max_code;       /* and its largest code of non zero frequency */\n{\n  var n;                     /* iterates over all tree elements */\n  var prevlen = -1;          /* last emitted length */\n  var curlen;                /* length of current code */\n\n  var nextlen = tree[0 * 2 + 1]/*.Len*/; /* length of next code */\n\n  var count = 0;             /* repeat count of the current code */\n  var max_count = 7;         /* max repeat count */\n  var min_count = 4;         /* min repeat count */\n\n  /* tree[max_code+1].Len = -1; */  /* guard already set */\n  if (nextlen === 0) {\n    max_count = 138;\n    min_count = 3;\n  }\n\n  for (n = 0; n <= max_code; n++) {\n    curlen = nextlen;\n    nextlen = tree[(n + 1) * 2 + 1]/*.Len*/;\n\n    if (++count < max_count && curlen === nextlen) {\n      continue;\n\n    } else if (count < min_count) {\n      do { send_code(s, curlen, s.bl_tree); } while (--count !== 0);\n\n    } else if (curlen !== 0) {\n      if (curlen !== prevlen) {\n        send_code(s, curlen, s.bl_tree);\n        count--;\n      }\n      //Assert(count >= 3 && count <= 6, \" 3_6?\");\n      send_code(s, REP_3_6, s.bl_tree);\n      send_bits(s, count - 3, 2);\n\n    } else if (count <= 10) {\n      send_code(s, REPZ_3_10, s.bl_tree);\n      send_bits(s, count - 3, 3);\n\n    } else {\n      send_code(s, REPZ_11_138, s.bl_tree);\n      send_bits(s, count - 11, 7);\n    }\n\n    count = 0;\n    prevlen = curlen;\n    if (nextlen === 0) {\n      max_count = 138;\n      min_count = 3;\n\n    } else if (curlen === nextlen) {\n      max_count = 6;\n      min_count = 3;\n\n    } else {\n      max_count = 7;\n      min_count = 4;\n    }\n  }\n}\n\n\n/* ===========================================================================\n * Construct the Huffman tree for the bit lengths and return the index in\n * bl_order of the last bit length code to send.\n */\nfunction build_bl_tree(s) {\n  var max_blindex;  /* index of last bit length code of non zero freq */\n\n  /* Determine the bit length frequencies for literal and distance trees */\n  scan_tree(s, s.dyn_ltree, s.l_desc.max_code);\n  scan_tree(s, s.dyn_dtree, s.d_desc.max_code);\n\n  /* Build the bit length tree: */\n  build_tree(s, s.bl_desc);\n  /* opt_len now includes the length of the tree representations, except\n   * the lengths of the bit lengths codes and the 5+5+4 bits for the counts.\n   */\n\n  /* Determine the number of bit length codes to send. The pkzip format\n   * requires that at least 4 bit length codes be sent. (appnote.txt says\n   * 3 but the actual value used is 4.)\n   */\n  for (max_blindex = BL_CODES - 1; max_blindex >= 3; max_blindex--) {\n    if (s.bl_tree[bl_order[max_blindex] * 2 + 1]/*.Len*/ !== 0) {\n      break;\n    }\n  }\n  /* Update opt_len to include the bit length tree and counts */\n  s.opt_len += 3 * (max_blindex + 1) + 5 + 5 + 4;\n  //Tracev((stderr, \"\\ndyn trees: dyn %ld, stat %ld\",\n  //        s->opt_len, s->static_len));\n\n  return max_blindex;\n}\n\n\n/* ===========================================================================\n * Send the header for a block using dynamic Huffman trees: the counts, the\n * lengths of the bit length codes, the literal tree and the distance tree.\n * IN assertion: lcodes >= 257, dcodes >= 1, blcodes >= 4.\n */\nfunction send_all_trees(s, lcodes, dcodes, blcodes)\n//    deflate_state *s;\n//    int lcodes, dcodes, blcodes; /* number of codes for each tree */\n{\n  var rank;                    /* index in bl_order */\n\n  //Assert (lcodes >= 257 && dcodes >= 1 && blcodes >= 4, \"not enough codes\");\n  //Assert (lcodes <= L_CODES && dcodes <= D_CODES && blcodes <= BL_CODES,\n  //        \"too many codes\");\n  //Tracev((stderr, \"\\nbl counts: \"));\n  send_bits(s, lcodes - 257, 5); /* not +255 as stated in appnote.txt */\n  send_bits(s, dcodes - 1,   5);\n  send_bits(s, blcodes - 4,  4); /* not -3 as stated in appnote.txt */\n  for (rank = 0; rank < blcodes; rank++) {\n    //Tracev((stderr, \"\\nbl code %2d \", bl_order[rank]));\n    send_bits(s, s.bl_tree[bl_order[rank] * 2 + 1]/*.Len*/, 3);\n  }\n  //Tracev((stderr, \"\\nbl tree: sent %ld\", s->bits_sent));\n\n  send_tree(s, s.dyn_ltree, lcodes - 1); /* literal tree */\n  //Tracev((stderr, \"\\nlit tree: sent %ld\", s->bits_sent));\n\n  send_tree(s, s.dyn_dtree, dcodes - 1); /* distance tree */\n  //Tracev((stderr, \"\\ndist tree: sent %ld\", s->bits_sent));\n}\n\n\n/* ===========================================================================\n * Check if the data type is TEXT or BINARY, using the following algorithm:\n * - TEXT if the two conditions below are satisfied:\n *    a) There are no non-portable control characters belonging to the\n *       \"black list\" (0..6, 14..25, 28..31).\n *    b) There is at least one printable character belonging to the\n *       \"white list\" (9 {TAB}, 10 {LF}, 13 {CR}, 32..255).\n * - BINARY otherwise.\n * - The following partially-portable control characters form a\n *   \"gray list\" that is ignored in this detection algorithm:\n *   (7 {BEL}, 8 {BS}, 11 {VT}, 12 {FF}, 26 {SUB}, 27 {ESC}).\n * IN assertion: the fields Freq of dyn_ltree are set.\n */\nfunction detect_data_type(s) {\n  /* black_mask is the bit mask of black-listed bytes\n   * set bits 0..6, 14..25, and 28..31\n   * 0xf3ffc07f = binary 11110011111111111100000001111111\n   */\n  var black_mask = 0xf3ffc07f;\n  var n;\n\n  /* Check for non-textual (\"black-listed\") bytes. */\n  for (n = 0; n <= 31; n++, black_mask >>>= 1) {\n    if ((black_mask & 1) && (s.dyn_ltree[n * 2]/*.Freq*/ !== 0)) {\n      return Z_BINARY;\n    }\n  }\n\n  /* Check for textual (\"white-listed\") bytes. */\n  if (s.dyn_ltree[9 * 2]/*.Freq*/ !== 0 || s.dyn_ltree[10 * 2]/*.Freq*/ !== 0 ||\n      s.dyn_ltree[13 * 2]/*.Freq*/ !== 0) {\n    return Z_TEXT;\n  }\n  for (n = 32; n < LITERALS; n++) {\n    if (s.dyn_ltree[n * 2]/*.Freq*/ !== 0) {\n      return Z_TEXT;\n    }\n  }\n\n  /* There are no \"black-listed\" or \"white-listed\" bytes:\n   * this stream either is empty or has tolerated (\"gray-listed\") bytes only.\n   */\n  return Z_BINARY;\n}\n\n\nvar static_init_done = false;\n\n/* ===========================================================================\n * Initialize the tree data structures for a new zlib stream.\n */\nfunction _tr_init(s)\n{\n\n  if (!static_init_done) {\n    tr_static_init();\n    static_init_done = true;\n  }\n\n  s.l_desc  = new TreeDesc(s.dyn_ltree, static_l_desc);\n  s.d_desc  = new TreeDesc(s.dyn_dtree, static_d_desc);\n  s.bl_desc = new TreeDesc(s.bl_tree, static_bl_desc);\n\n  s.bi_buf = 0;\n  s.bi_valid = 0;\n\n  /* Initialize the first block of the first file: */\n  init_block(s);\n}\n\n\n/* ===========================================================================\n * Send a stored block\n */\nfunction _tr_stored_block(s, buf, stored_len, last)\n//DeflateState *s;\n//charf *buf;       /* input block */\n//ulg stored_len;   /* length of input block */\n//int last;         /* one if this is the last block for a file */\n{\n  send_bits(s, (STORED_BLOCK << 1) + (last ? 1 : 0), 3);    /* send block type */\n  copy_block(s, buf, stored_len, true); /* with header */\n}\n\n\n/* ===========================================================================\n * Send one empty static block to give enough lookahead for inflate.\n * This takes 10 bits, of which 7 may remain in the bit buffer.\n */\nfunction _tr_align(s) {\n  send_bits(s, STATIC_TREES << 1, 3);\n  send_code(s, END_BLOCK, static_ltree);\n  bi_flush(s);\n}\n\n\n/* ===========================================================================\n * Determine the best encoding for the current block: dynamic trees, static\n * trees or store, and output the encoded block to the zip file.\n */\nfunction _tr_flush_block(s, buf, stored_len, last)\n//DeflateState *s;\n//charf *buf;       /* input block, or NULL if too old */\n//ulg stored_len;   /* length of input block */\n//int last;         /* one if this is the last block for a file */\n{\n  var opt_lenb, static_lenb;  /* opt_len and static_len in bytes */\n  var max_blindex = 0;        /* index of last bit length code of non zero freq */\n\n  /* Build the Huffman trees unless a stored block is forced */\n  if (s.level > 0) {\n\n    /* Check if the file is binary or text */\n    if (s.strm.data_type === Z_UNKNOWN) {\n      s.strm.data_type = detect_data_type(s);\n    }\n\n    /* Construct the literal and distance trees */\n    build_tree(s, s.l_desc);\n    // Tracev((stderr, \"\\nlit data: dyn %ld, stat %ld\", s->opt_len,\n    //        s->static_len));\n\n    build_tree(s, s.d_desc);\n    // Tracev((stderr, \"\\ndist data: dyn %ld, stat %ld\", s->opt_len,\n    //        s->static_len));\n    /* At this point, opt_len and static_len are the total bit lengths of\n     * the compressed block data, excluding the tree representations.\n     */\n\n    /* Build the bit length tree for the above two trees, and get the index\n     * in bl_order of the last bit length code to send.\n     */\n    max_blindex = build_bl_tree(s);\n\n    /* Determine the best encoding. Compute the block lengths in bytes. */\n    opt_lenb = (s.opt_len + 3 + 7) >>> 3;\n    static_lenb = (s.static_len + 3 + 7) >>> 3;\n\n    // Tracev((stderr, \"\\nopt %lu(%lu) stat %lu(%lu) stored %lu lit %u \",\n    //        opt_lenb, s->opt_len, static_lenb, s->static_len, stored_len,\n    //        s->last_lit));\n\n    if (static_lenb <= opt_lenb) { opt_lenb = static_lenb; }\n\n  } else {\n    // Assert(buf != (char*)0, \"lost buf\");\n    opt_lenb = static_lenb = stored_len + 5; /* force a stored block */\n  }\n\n  if ((stored_len + 4 <= opt_lenb) && (buf !== -1)) {\n    /* 4: two words for the lengths */\n\n    /* The test buf != NULL is only necessary if LIT_BUFSIZE > WSIZE.\n     * Otherwise we can't have processed more than WSIZE input bytes since\n     * the last block flush, because compression would have been\n     * successful. If LIT_BUFSIZE <= WSIZE, it is never too late to\n     * transform a block into a stored block.\n     */\n    _tr_stored_block(s, buf, stored_len, last);\n\n  } else if (s.strategy === Z_FIXED || static_lenb === opt_lenb) {\n\n    send_bits(s, (STATIC_TREES << 1) + (last ? 1 : 0), 3);\n    compress_block(s, static_ltree, static_dtree);\n\n  } else {\n    send_bits(s, (DYN_TREES << 1) + (last ? 1 : 0), 3);\n    send_all_trees(s, s.l_desc.max_code + 1, s.d_desc.max_code + 1, max_blindex + 1);\n    compress_block(s, s.dyn_ltree, s.dyn_dtree);\n  }\n  // Assert (s->compressed_len == s->bits_sent, \"bad compressed size\");\n  /* The above check is made mod 2^32, for files larger than 512 MB\n   * and uLong implemented on 32 bits.\n   */\n  init_block(s);\n\n  if (last) {\n    bi_windup(s);\n  }\n  // Tracev((stderr,\"\\ncomprlen %lu(%lu) \", s->compressed_len>>3,\n  //       s->compressed_len-7*last));\n}\n\n/* ===========================================================================\n * Save the match info and tally the frequency counts. Return true if\n * the current block must be flushed.\n */\nfunction _tr_tally(s, dist, lc)\n//    deflate_state *s;\n//    unsigned dist;  /* distance of matched string */\n//    unsigned lc;    /* match length-MIN_MATCH or unmatched char (if dist==0) */\n{\n  //var out_length, in_length, dcode;\n\n  s.pending_buf[s.d_buf + s.last_lit * 2]     = (dist >>> 8) & 0xff;\n  s.pending_buf[s.d_buf + s.last_lit * 2 + 1] = dist & 0xff;\n\n  s.pending_buf[s.l_buf + s.last_lit] = lc & 0xff;\n  s.last_lit++;\n\n  if (dist === 0) {\n    /* lc is the unmatched char */\n    s.dyn_ltree[lc * 2]/*.Freq*/++;\n  } else {\n    s.matches++;\n    /* Here, lc is the match length - MIN_MATCH */\n    dist--;             /* dist = match distance - 1 */\n    //Assert((ush)dist < (ush)MAX_DIST(s) &&\n    //       (ush)lc <= (ush)(MAX_MATCH-MIN_MATCH) &&\n    //       (ush)d_code(dist) < (ush)D_CODES,  \"_tr_tally: bad match\");\n\n    s.dyn_ltree[(_length_code[lc] + LITERALS + 1) * 2]/*.Freq*/++;\n    s.dyn_dtree[d_code(dist) * 2]/*.Freq*/++;\n  }\n\n// (!) This block is disabled in zlib defaults,\n// don't enable it for binary compatibility\n\n//#ifdef TRUNCATE_BLOCK\n//  /* Try to guess if it is profitable to stop the current block here */\n//  if ((s.last_lit & 0x1fff) === 0 && s.level > 2) {\n//    /* Compute an upper bound for the compressed length */\n//    out_length = s.last_lit*8;\n//    in_length = s.strstart - s.block_start;\n//\n//    for (dcode = 0; dcode < D_CODES; dcode++) {\n//      out_length += s.dyn_dtree[dcode*2]/*.Freq*/ * (5 + extra_dbits[dcode]);\n//    }\n//    out_length >>>= 3;\n//    //Tracev((stderr,\"\\nlast_lit %u, in %ld, out ~%ld(%ld%%) \",\n//    //       s->last_lit, in_length, out_length,\n//    //       100L - out_length*100L/in_length));\n//    if (s.matches < (s.last_lit>>1)/*int /2*/ && out_length < (in_length>>1)/*int /2*/) {\n//      return true;\n//    }\n//  }\n//#endif\n\n  return (s.last_lit === s.lit_bufsize - 1);\n  /* We avoid equality with lit_bufsize because of wraparound at 64K\n   * on 16 bit machines and because stored blocks are restricted to\n   * 64K-1 bytes.\n   */\n}\n\nexports._tr_init  = _tr_init;\nexports._tr_stored_block = _tr_stored_block;\nexports._tr_flush_block  = _tr_flush_block;\nexports._tr_tally = _tr_tally;\nexports._tr_align = _tr_align;\n","'use strict';\n\n// (C) 1995-2013 Jean-loup Gailly and Mark Adler\n// (C) 2014-2017 Vitaly Puzrin and Andrey Tupitsin\n//\n// This software is provided 'as-is', without any express or implied\n// warranty. In no event will the authors be held liable for any damages\n// arising from the use of this software.\n//\n// Permission is granted to anyone to use this software for any purpose,\n// including commercial applications, and to alter it and redistribute it\n// freely, subject to the following restrictions:\n//\n// 1. The origin of this software must not be misrepresented; you must not\n//   claim that you wrote the original software. If you use this software\n//   in a product, an acknowledgment in the product documentation would be\n//   appreciated but is not required.\n// 2. Altered source versions must be plainly marked as such, and must not be\n//   misrepresented as being the original software.\n// 3. This notice may not be removed or altered from any source distribution.\n\nfunction ZStream() {\n  /* next input byte */\n  this.input = null; // JS specific, because we have no pointers\n  this.next_in = 0;\n  /* number of bytes available at input */\n  this.avail_in = 0;\n  /* total number of input bytes read so far */\n  this.total_in = 0;\n  /* next output byte should be put there */\n  this.output = null; // JS specific, because we have no pointers\n  this.next_out = 0;\n  /* remaining free space at output */\n  this.avail_out = 0;\n  /* total number of bytes output so far */\n  this.total_out = 0;\n  /* last error message, NULL if no error */\n  this.msg = ''/*Z_NULL*/;\n  /* not visible by applications */\n  this.state = null;\n  /* best guess about the data type: binary or text */\n  this.data_type = 2/*Z_UNKNOWN*/;\n  /* adler32 value of the uncompressed data */\n  this.adler = 0;\n}\n\nmodule.exports = ZStream;\n","module.exports = Pend;\n\nfunction Pend() {\n  this.pending = 0;\n  this.max = Infinity;\n  this.listeners = [];\n  this.waiting = [];\n  this.error = null;\n}\n\nPend.prototype.go = function(fn) {\n  if (this.pending < this.max) {\n    pendGo(this, fn);\n  } else {\n    this.waiting.push(fn);\n  }\n};\n\nPend.prototype.wait = function(cb) {\n  if (this.pending === 0) {\n    cb(this.error);\n  } else {\n    this.listeners.push(cb);\n  }\n};\n\nPend.prototype.hold = function() {\n  return pendHold(this);\n};\n\nfunction pendHold(self) {\n  self.pending += 1;\n  var called = false;\n  return onCb;\n  function onCb(err) {\n    if (called) throw new Error(\"callback called twice\");\n    called = true;\n    self.error = self.error || err;\n    self.pending -= 1;\n    if (self.waiting.length > 0 && self.pending < self.max) {\n      pendGo(self, self.waiting.shift());\n    } else if (self.pending === 0) {\n      var listeners = self.listeners;\n      self.listeners = [];\n      listeners.forEach(cbListener);\n    }\n  }\n  function cbListener(listener) {\n    listener(self.error);\n  }\n}\n\nfunction pendGo(self, fn) {\n  fn(pendHold(self));\n}\n","// shim for using process in browser\nvar process = module.exports = {};\n\n// cached from whatever global is present so that test runners that stub it\n// don't break things.  But we need to wrap it in a try catch in case it is\n// wrapped in strict mode code which doesn't define any globals.  It's inside a\n// function because try/catches deoptimize in certain engines.\n\nvar cachedSetTimeout;\nvar cachedClearTimeout;\n\nfunction defaultSetTimout() {\n    throw new Error('setTimeout has not been defined');\n}\nfunction defaultClearTimeout () {\n    throw new Error('clearTimeout has not been defined');\n}\n(function () {\n    try {\n        if (typeof setTimeout === 'function') {\n            cachedSetTimeout = setTimeout;\n        } else {\n            cachedSetTimeout = defaultSetTimout;\n        }\n    } catch (e) {\n        cachedSetTimeout = defaultSetTimout;\n    }\n    try {\n        if (typeof clearTimeout === 'function') {\n            cachedClearTimeout = clearTimeout;\n        } else {\n            cachedClearTimeout = defaultClearTimeout;\n        }\n    } catch (e) {\n        cachedClearTimeout = defaultClearTimeout;\n    }\n} ())\nfunction runTimeout(fun) {\n    if (cachedSetTimeout === setTimeout) {\n        //normal enviroments in sane situations\n        return setTimeout(fun, 0);\n    }\n    // if setTimeout wasn't available but was latter defined\n    if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {\n        cachedSetTimeout = setTimeout;\n        return setTimeout(fun, 0);\n    }\n    try {\n        // when when somebody has screwed with setTimeout but no I.E. maddness\n        return cachedSetTimeout(fun, 0);\n    } catch(e){\n        try {\n            // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally\n            return cachedSetTimeout.call(null, fun, 0);\n        } catch(e){\n            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error\n            return cachedSetTimeout.call(this, fun, 0);\n        }\n    }\n\n\n}\nfunction runClearTimeout(marker) {\n    if (cachedClearTimeout === clearTimeout) {\n        //normal enviroments in sane situations\n        return clearTimeout(marker);\n    }\n    // if clearTimeout wasn't available but was latter defined\n    if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {\n        cachedClearTimeout = clearTimeout;\n        return clearTimeout(marker);\n    }\n    try {\n        // when when somebody has screwed with setTimeout but no I.E. maddness\n        return cachedClearTimeout(marker);\n    } catch (e){\n        try {\n            // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally\n            return cachedClearTimeout.call(null, marker);\n        } catch (e){\n            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.\n            // Some versions of I.E. have different rules for clearTimeout vs setTimeout\n            return cachedClearTimeout.call(this, marker);\n        }\n    }\n\n\n\n}\nvar queue = [];\nvar draining = false;\nvar currentQueue;\nvar queueIndex = -1;\n\nfunction cleanUpNextTick() {\n    if (!draining || !currentQueue) {\n        return;\n    }\n    draining = false;\n    if (currentQueue.length) {\n        queue = currentQueue.concat(queue);\n    } else {\n        queueIndex = -1;\n    }\n    if (queue.length) {\n        drainQueue();\n    }\n}\n\nfunction drainQueue() {\n    if (draining) {\n        return;\n    }\n    var timeout = runTimeout(cleanUpNextTick);\n    draining = true;\n\n    var len = queue.length;\n    while(len) {\n        currentQueue = queue;\n        queue = [];\n        while (++queueIndex < len) {\n            if (currentQueue) {\n                currentQueue[queueIndex].run();\n            }\n        }\n        queueIndex = -1;\n        len = queue.length;\n    }\n    currentQueue = null;\n    draining = false;\n    runClearTimeout(timeout);\n}\n\nprocess.nextTick = function (fun) {\n    var args = new Array(arguments.length - 1);\n    if (arguments.length > 1) {\n        for (var i = 1; i < arguments.length; i++) {\n            args[i - 1] = arguments[i];\n        }\n    }\n    queue.push(new Item(fun, args));\n    if (queue.length === 1 && !draining) {\n        runTimeout(drainQueue);\n    }\n};\n\n// v8 likes predictible objects\nfunction Item(fun, array) {\n    this.fun = fun;\n    this.array = array;\n}\nItem.prototype.run = function () {\n    this.fun.apply(null, this.array);\n};\nprocess.title = 'browser';\nprocess.browser = true;\nprocess.env = {};\nprocess.argv = [];\nprocess.version = ''; // empty string to avoid regexp issues\nprocess.versions = {};\n\nfunction noop() {}\n\nprocess.on = noop;\nprocess.addListener = noop;\nprocess.once = noop;\nprocess.off = noop;\nprocess.removeListener = noop;\nprocess.removeAllListeners = noop;\nprocess.emit = noop;\nprocess.prependListener = noop;\nprocess.prependOnceListener = noop;\n\nprocess.listeners = function (name) { return [] }\n\nprocess.binding = function (name) {\n    throw new Error('process.binding is not supported');\n};\n\nprocess.cwd = function () { return '/' };\nprocess.chdir = function (dir) {\n    throw new Error('process.chdir is not supported');\n};\nprocess.umask = function() { return 0; };\n","/**\n * Copyright (c) 2014-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\nvar runtime = (function (exports) {\n  \"use strict\";\n\n  var Op = Object.prototype;\n  var hasOwn = Op.hasOwnProperty;\n  var undefined; // More compressible than void 0.\n  var $Symbol = typeof Symbol === \"function\" ? Symbol : {};\n  var iteratorSymbol = $Symbol.iterator || \"@@iterator\";\n  var asyncIteratorSymbol = $Symbol.asyncIterator || \"@@asyncIterator\";\n  var toStringTagSymbol = $Symbol.toStringTag || \"@@toStringTag\";\n\n  function wrap(innerFn, outerFn, self, tryLocsList) {\n    // If outerFn provided and outerFn.prototype is a Generator, then outerFn.prototype instanceof Generator.\n    var protoGenerator = outerFn && outerFn.prototype instanceof Generator ? outerFn : Generator;\n    var generator = Object.create(protoGenerator.prototype);\n    var context = new Context(tryLocsList || []);\n\n    // The ._invoke method unifies the implementations of the .next,\n    // .throw, and .return methods.\n    generator._invoke = makeInvokeMethod(innerFn, self, context);\n\n    return generator;\n  }\n  exports.wrap = wrap;\n\n  // Try/catch helper to minimize deoptimizations. Returns a completion\n  // record like context.tryEntries[i].completion. This interface could\n  // have been (and was previously) designed to take a closure to be\n  // invoked without arguments, but in all the cases we care about we\n  // already have an existing method we want to call, so there's no need\n  // to create a new function object. We can even get away with assuming\n  // the method takes exactly one argument, since that happens to be true\n  // in every case, so we don't have to touch the arguments object. The\n  // only additional allocation required is the completion record, which\n  // has a stable shape and so hopefully should be cheap to allocate.\n  function tryCatch(fn, obj, arg) {\n    try {\n      return { type: \"normal\", arg: fn.call(obj, arg) };\n    } catch (err) {\n      return { type: \"throw\", arg: err };\n    }\n  }\n\n  var GenStateSuspendedStart = \"suspendedStart\";\n  var GenStateSuspendedYield = \"suspendedYield\";\n  var GenStateExecuting = \"executing\";\n  var GenStateCompleted = \"completed\";\n\n  // Returning this object from the innerFn has the same effect as\n  // breaking out of the dispatch switch statement.\n  var ContinueSentinel = {};\n\n  // Dummy constructor functions that we use as the .constructor and\n  // .constructor.prototype properties for functions that return Generator\n  // objects. For full spec compliance, you may wish to configure your\n  // minifier not to mangle the names of these two functions.\n  function Generator() {}\n  function GeneratorFunction() {}\n  function GeneratorFunctionPrototype() {}\n\n  // This is a polyfill for %IteratorPrototype% for environments that\n  // don't natively support it.\n  var IteratorPrototype = {};\n  IteratorPrototype[iteratorSymbol] = function () {\n    return this;\n  };\n\n  var getProto = Object.getPrototypeOf;\n  var NativeIteratorPrototype = getProto && getProto(getProto(values([])));\n  if (NativeIteratorPrototype &&\n      NativeIteratorPrototype !== Op &&\n      hasOwn.call(NativeIteratorPrototype, iteratorSymbol)) {\n    // This environment has a native %IteratorPrototype%; use it instead\n    // of the polyfill.\n    IteratorPrototype = NativeIteratorPrototype;\n  }\n\n  var Gp = GeneratorFunctionPrototype.prototype =\n    Generator.prototype = Object.create(IteratorPrototype);\n  GeneratorFunction.prototype = Gp.constructor = GeneratorFunctionPrototype;\n  GeneratorFunctionPrototype.constructor = GeneratorFunction;\n  GeneratorFunctionPrototype[toStringTagSymbol] =\n    GeneratorFunction.displayName = \"GeneratorFunction\";\n\n  // Helper for defining the .next, .throw, and .return methods of the\n  // Iterator interface in terms of a single ._invoke method.\n  function defineIteratorMethods(prototype) {\n    [\"next\", \"throw\", \"return\"].forEach(function(method) {\n      prototype[method] = function(arg) {\n        return this._invoke(method, arg);\n      };\n    });\n  }\n\n  exports.isGeneratorFunction = function(genFun) {\n    var ctor = typeof genFun === \"function\" && genFun.constructor;\n    return ctor\n      ? ctor === GeneratorFunction ||\n        // For the native GeneratorFunction constructor, the best we can\n        // do is to check its .name property.\n        (ctor.displayName || ctor.name) === \"GeneratorFunction\"\n      : false;\n  };\n\n  exports.mark = function(genFun) {\n    if (Object.setPrototypeOf) {\n      Object.setPrototypeOf(genFun, GeneratorFunctionPrototype);\n    } else {\n      genFun.__proto__ = GeneratorFunctionPrototype;\n      if (!(toStringTagSymbol in genFun)) {\n        genFun[toStringTagSymbol] = \"GeneratorFunction\";\n      }\n    }\n    genFun.prototype = Object.create(Gp);\n    return genFun;\n  };\n\n  // Within the body of any async function, `await x` is transformed to\n  // `yield regeneratorRuntime.awrap(x)`, so that the runtime can test\n  // `hasOwn.call(value, \"__await\")` to determine if the yielded value is\n  // meant to be awaited.\n  exports.awrap = function(arg) {\n    return { __await: arg };\n  };\n\n  function AsyncIterator(generator, PromiseImpl) {\n    function invoke(method, arg, resolve, reject) {\n      var record = tryCatch(generator[method], generator, arg);\n      if (record.type === \"throw\") {\n        reject(record.arg);\n      } else {\n        var result = record.arg;\n        var value = result.value;\n        if (value &&\n            typeof value === \"object\" &&\n            hasOwn.call(value, \"__await\")) {\n          return PromiseImpl.resolve(value.__await).then(function(value) {\n            invoke(\"next\", value, resolve, reject);\n          }, function(err) {\n            invoke(\"throw\", err, resolve, reject);\n          });\n        }\n\n        return PromiseImpl.resolve(value).then(function(unwrapped) {\n          // When a yielded Promise is resolved, its final value becomes\n          // the .value of the Promise<{value,done}> result for the\n          // current iteration.\n          result.value = unwrapped;\n          resolve(result);\n        }, function(error) {\n          // If a rejected Promise was yielded, throw the rejection back\n          // into the async generator function so it can be handled there.\n          return invoke(\"throw\", error, resolve, reject);\n        });\n      }\n    }\n\n    var previousPromise;\n\n    function enqueue(method, arg) {\n      function callInvokeWithMethodAndArg() {\n        return new PromiseImpl(function(resolve, reject) {\n          invoke(method, arg, resolve, reject);\n        });\n      }\n\n      return previousPromise =\n        // If enqueue has been called before, then we want to wait until\n        // all previous Promises have been resolved before calling invoke,\n        // so that results are always delivered in the correct order. If\n        // enqueue has not been called before, then it is important to\n        // call invoke immediately, without waiting on a callback to fire,\n        // so that the async generator function has the opportunity to do\n        // any necessary setup in a predictable way. This predictability\n        // is why the Promise constructor synchronously invokes its\n        // executor callback, and why async functions synchronously\n        // execute code before the first await. Since we implement simple\n        // async functions in terms of async generators, it is especially\n        // important to get this right, even though it requires care.\n        previousPromise ? previousPromise.then(\n          callInvokeWithMethodAndArg,\n          // Avoid propagating failures to Promises returned by later\n          // invocations of the iterator.\n          callInvokeWithMethodAndArg\n        ) : callInvokeWithMethodAndArg();\n    }\n\n    // Define the unified helper method that is used to implement .next,\n    // .throw, and .return (see defineIteratorMethods).\n    this._invoke = enqueue;\n  }\n\n  defineIteratorMethods(AsyncIterator.prototype);\n  AsyncIterator.prototype[asyncIteratorSymbol] = function () {\n    return this;\n  };\n  exports.AsyncIterator = AsyncIterator;\n\n  // Note that simple async functions are implemented on top of\n  // AsyncIterator objects; they just return a Promise for the value of\n  // the final result produced by the iterator.\n  exports.async = function(innerFn, outerFn, self, tryLocsList, PromiseImpl) {\n    if (PromiseImpl === void 0) PromiseImpl = Promise;\n\n    var iter = new AsyncIterator(\n      wrap(innerFn, outerFn, self, tryLocsList),\n      PromiseImpl\n    );\n\n    return exports.isGeneratorFunction(outerFn)\n      ? iter // If outerFn is a generator, return the full iterator.\n      : iter.next().then(function(result) {\n          return result.done ? result.value : iter.next();\n        });\n  };\n\n  function makeInvokeMethod(innerFn, self, context) {\n    var state = GenStateSuspendedStart;\n\n    return function invoke(method, arg) {\n      if (state === GenStateExecuting) {\n        throw new Error(\"Generator is already running\");\n      }\n\n      if (state === GenStateCompleted) {\n        if (method === \"throw\") {\n          throw arg;\n        }\n\n        // Be forgiving, per 25.3.3.3.3 of the spec:\n        // https://people.mozilla.org/~jorendorff/es6-draft.html#sec-generatorresume\n        return doneResult();\n      }\n\n      context.method = method;\n      context.arg = arg;\n\n      while (true) {\n        var delegate = context.delegate;\n        if (delegate) {\n          var delegateResult = maybeInvokeDelegate(delegate, context);\n          if (delegateResult) {\n            if (delegateResult === ContinueSentinel) continue;\n            return delegateResult;\n          }\n        }\n\n        if (context.method === \"next\") {\n          // Setting context._sent for legacy support of Babel's\n          // function.sent implementation.\n          context.sent = context._sent = context.arg;\n\n        } else if (context.method === \"throw\") {\n          if (state === GenStateSuspendedStart) {\n            state = GenStateCompleted;\n            throw context.arg;\n          }\n\n          context.dispatchException(context.arg);\n\n        } else if (context.method === \"return\") {\n          context.abrupt(\"return\", context.arg);\n        }\n\n        state = GenStateExecuting;\n\n        var record = tryCatch(innerFn, self, context);\n        if (record.type === \"normal\") {\n          // If an exception is thrown from innerFn, we leave state ===\n          // GenStateExecuting and loop back for another invocation.\n          state = context.done\n            ? GenStateCompleted\n            : GenStateSuspendedYield;\n\n          if (record.arg === ContinueSentinel) {\n            continue;\n          }\n\n          return {\n            value: record.arg,\n            done: context.done\n          };\n\n        } else if (record.type === \"throw\") {\n          state = GenStateCompleted;\n          // Dispatch the exception by looping back around to the\n          // context.dispatchException(context.arg) call above.\n          context.method = \"throw\";\n          context.arg = record.arg;\n        }\n      }\n    };\n  }\n\n  // Call delegate.iterator[context.method](context.arg) and handle the\n  // result, either by returning a { value, done } result from the\n  // delegate iterator, or by modifying context.method and context.arg,\n  // setting context.delegate to null, and returning the ContinueSentinel.\n  function maybeInvokeDelegate(delegate, context) {\n    var method = delegate.iterator[context.method];\n    if (method === undefined) {\n      // A .throw or .return when the delegate iterator has no .throw\n      // method always terminates the yield* loop.\n      context.delegate = null;\n\n      if (context.method === \"throw\") {\n        // Note: [\"return\"] must be used for ES3 parsing compatibility.\n        if (delegate.iterator[\"return\"]) {\n          // If the delegate iterator has a return method, give it a\n          // chance to clean up.\n          context.method = \"return\";\n          context.arg = undefined;\n          maybeInvokeDelegate(delegate, context);\n\n          if (context.method === \"throw\") {\n            // If maybeInvokeDelegate(context) changed context.method from\n            // \"return\" to \"throw\", let that override the TypeError below.\n            return ContinueSentinel;\n          }\n        }\n\n        context.method = \"throw\";\n        context.arg = new TypeError(\n          \"The iterator does not provide a 'throw' method\");\n      }\n\n      return ContinueSentinel;\n    }\n\n    var record = tryCatch(method, delegate.iterator, context.arg);\n\n    if (record.type === \"throw\") {\n      context.method = \"throw\";\n      context.arg = record.arg;\n      context.delegate = null;\n      return ContinueSentinel;\n    }\n\n    var info = record.arg;\n\n    if (! info) {\n      context.method = \"throw\";\n      context.arg = new TypeError(\"iterator result is not an object\");\n      context.delegate = null;\n      return ContinueSentinel;\n    }\n\n    if (info.done) {\n      // Assign the result of the finished delegate to the temporary\n      // variable specified by delegate.resultName (see delegateYield).\n      context[delegate.resultName] = info.value;\n\n      // Resume execution at the desired location (see delegateYield).\n      context.next = delegate.nextLoc;\n\n      // If context.method was \"throw\" but the delegate handled the\n      // exception, let the outer generator proceed normally. If\n      // context.method was \"next\", forget context.arg since it has been\n      // \"consumed\" by the delegate iterator. If context.method was\n      // \"return\", allow the original .return call to continue in the\n      // outer generator.\n      if (context.method !== \"return\") {\n        context.method = \"next\";\n        context.arg = undefined;\n      }\n\n    } else {\n      // Re-yield the result returned by the delegate method.\n      return info;\n    }\n\n    // The delegate iterator is finished, so forget it and continue with\n    // the outer generator.\n    context.delegate = null;\n    return ContinueSentinel;\n  }\n\n  // Define Generator.prototype.{next,throw,return} in terms of the\n  // unified ._invoke helper method.\n  defineIteratorMethods(Gp);\n\n  Gp[toStringTagSymbol] = \"Generator\";\n\n  // A Generator should always return itself as the iterator object when the\n  // @@iterator function is called on it. Some browsers' implementations of the\n  // iterator prototype chain incorrectly implement this, causing the Generator\n  // object to not be returned from this call. This ensures that doesn't happen.\n  // See https://github.com/facebook/regenerator/issues/274 for more details.\n  Gp[iteratorSymbol] = function() {\n    return this;\n  };\n\n  Gp.toString = function() {\n    return \"[object Generator]\";\n  };\n\n  function pushTryEntry(locs) {\n    var entry = { tryLoc: locs[0] };\n\n    if (1 in locs) {\n      entry.catchLoc = locs[1];\n    }\n\n    if (2 in locs) {\n      entry.finallyLoc = locs[2];\n      entry.afterLoc = locs[3];\n    }\n\n    this.tryEntries.push(entry);\n  }\n\n  function resetTryEntry(entry) {\n    var record = entry.completion || {};\n    record.type = \"normal\";\n    delete record.arg;\n    entry.completion = record;\n  }\n\n  function Context(tryLocsList) {\n    // The root entry object (effectively a try statement without a catch\n    // or a finally block) gives us a place to store values thrown from\n    // locations where there is no enclosing try statement.\n    this.tryEntries = [{ tryLoc: \"root\" }];\n    tryLocsList.forEach(pushTryEntry, this);\n    this.reset(true);\n  }\n\n  exports.keys = function(object) {\n    var keys = [];\n    for (var key in object) {\n      keys.push(key);\n    }\n    keys.reverse();\n\n    // Rather than returning an object with a next method, we keep\n    // things simple and return the next function itself.\n    return function next() {\n      while (keys.length) {\n        var key = keys.pop();\n        if (key in object) {\n          next.value = key;\n          next.done = false;\n          return next;\n        }\n      }\n\n      // To avoid creating an additional object, we just hang the .value\n      // and .done properties off the next function object itself. This\n      // also ensures that the minifier will not anonymize the function.\n      next.done = true;\n      return next;\n    };\n  };\n\n  function values(iterable) {\n    if (iterable) {\n      var iteratorMethod = iterable[iteratorSymbol];\n      if (iteratorMethod) {\n        return iteratorMethod.call(iterable);\n      }\n\n      if (typeof iterable.next === \"function\") {\n        return iterable;\n      }\n\n      if (!isNaN(iterable.length)) {\n        var i = -1, next = function next() {\n          while (++i < iterable.length) {\n            if (hasOwn.call(iterable, i)) {\n              next.value = iterable[i];\n              next.done = false;\n              return next;\n            }\n          }\n\n          next.value = undefined;\n          next.done = true;\n\n          return next;\n        };\n\n        return next.next = next;\n      }\n    }\n\n    // Return an iterator with no values.\n    return { next: doneResult };\n  }\n  exports.values = values;\n\n  function doneResult() {\n    return { value: undefined, done: true };\n  }\n\n  Context.prototype = {\n    constructor: Context,\n\n    reset: function(skipTempReset) {\n      this.prev = 0;\n      this.next = 0;\n      // Resetting context._sent for legacy support of Babel's\n      // function.sent implementation.\n      this.sent = this._sent = undefined;\n      this.done = false;\n      this.delegate = null;\n\n      this.method = \"next\";\n      this.arg = undefined;\n\n      this.tryEntries.forEach(resetTryEntry);\n\n      if (!skipTempReset) {\n        for (var name in this) {\n          // Not sure about the optimal order of these conditions:\n          if (name.charAt(0) === \"t\" &&\n              hasOwn.call(this, name) &&\n              !isNaN(+name.slice(1))) {\n            this[name] = undefined;\n          }\n        }\n      }\n    },\n\n    stop: function() {\n      this.done = true;\n\n      var rootEntry = this.tryEntries[0];\n      var rootRecord = rootEntry.completion;\n      if (rootRecord.type === \"throw\") {\n        throw rootRecord.arg;\n      }\n\n      return this.rval;\n    },\n\n    dispatchException: function(exception) {\n      if (this.done) {\n        throw exception;\n      }\n\n      var context = this;\n      function handle(loc, caught) {\n        record.type = \"throw\";\n        record.arg = exception;\n        context.next = loc;\n\n        if (caught) {\n          // If the dispatched exception was caught by a catch block,\n          // then let that catch block handle the exception normally.\n          context.method = \"next\";\n          context.arg = undefined;\n        }\n\n        return !! caught;\n      }\n\n      for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n        var entry = this.tryEntries[i];\n        var record = entry.completion;\n\n        if (entry.tryLoc === \"root\") {\n          // Exception thrown outside of any try block that could handle\n          // it, so set the completion value of the entire function to\n          // throw the exception.\n          return handle(\"end\");\n        }\n\n        if (entry.tryLoc <= this.prev) {\n          var hasCatch = hasOwn.call(entry, \"catchLoc\");\n          var hasFinally = hasOwn.call(entry, \"finallyLoc\");\n\n          if (hasCatch && hasFinally) {\n            if (this.prev < entry.catchLoc) {\n              return handle(entry.catchLoc, true);\n            } else if (this.prev < entry.finallyLoc) {\n              return handle(entry.finallyLoc);\n            }\n\n          } else if (hasCatch) {\n            if (this.prev < entry.catchLoc) {\n              return handle(entry.catchLoc, true);\n            }\n\n          } else if (hasFinally) {\n            if (this.prev < entry.finallyLoc) {\n              return handle(entry.finallyLoc);\n            }\n\n          } else {\n            throw new Error(\"try statement without catch or finally\");\n          }\n        }\n      }\n    },\n\n    abrupt: function(type, arg) {\n      for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n        var entry = this.tryEntries[i];\n        if (entry.tryLoc <= this.prev &&\n            hasOwn.call(entry, \"finallyLoc\") &&\n            this.prev < entry.finallyLoc) {\n          var finallyEntry = entry;\n          break;\n        }\n      }\n\n      if (finallyEntry &&\n          (type === \"break\" ||\n           type === \"continue\") &&\n          finallyEntry.tryLoc <= arg &&\n          arg <= finallyEntry.finallyLoc) {\n        // Ignore the finally entry if control is not jumping to a\n        // location outside the try/catch block.\n        finallyEntry = null;\n      }\n\n      var record = finallyEntry ? finallyEntry.completion : {};\n      record.type = type;\n      record.arg = arg;\n\n      if (finallyEntry) {\n        this.method = \"next\";\n        this.next = finallyEntry.finallyLoc;\n        return ContinueSentinel;\n      }\n\n      return this.complete(record);\n    },\n\n    complete: function(record, afterLoc) {\n      if (record.type === \"throw\") {\n        throw record.arg;\n      }\n\n      if (record.type === \"break\" ||\n          record.type === \"continue\") {\n        this.next = record.arg;\n      } else if (record.type === \"return\") {\n        this.rval = this.arg = record.arg;\n        this.method = \"return\";\n        this.next = \"end\";\n      } else if (record.type === \"normal\" && afterLoc) {\n        this.next = afterLoc;\n      }\n\n      return ContinueSentinel;\n    },\n\n    finish: function(finallyLoc) {\n      for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n        var entry = this.tryEntries[i];\n        if (entry.finallyLoc === finallyLoc) {\n          this.complete(entry.completion, entry.afterLoc);\n          resetTryEntry(entry);\n          return ContinueSentinel;\n        }\n      }\n    },\n\n    \"catch\": function(tryLoc) {\n      for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n        var entry = this.tryEntries[i];\n        if (entry.tryLoc === tryLoc) {\n          var record = entry.completion;\n          if (record.type === \"throw\") {\n            var thrown = record.arg;\n            resetTryEntry(entry);\n          }\n          return thrown;\n        }\n      }\n\n      // The context.catch method must only be called with a location\n      // argument that corresponds to a known catch block.\n      throw new Error(\"illegal catch attempt\");\n    },\n\n    delegateYield: function(iterable, resultName, nextLoc) {\n      this.delegate = {\n        iterator: values(iterable),\n        resultName: resultName,\n        nextLoc: nextLoc\n      };\n\n      if (this.method === \"next\") {\n        // Deliberately forget the last sent value so that we don't\n        // accidentally pass it on to the delegate.\n        this.arg = undefined;\n      }\n\n      return ContinueSentinel;\n    }\n  };\n\n  // Regardless of whether this script is executing as a CommonJS module\n  // or not, return the runtime object so that we can declare the variable\n  // regeneratorRuntime in the outer scope, which allows this module to be\n  // injected easily by `bin/regenerator --include-runtime script.js`.\n  return exports;\n\n}(\n  // If this script is executing as a CommonJS module, use module.exports\n  // as the regeneratorRuntime namespace. Otherwise create a new empty\n  // object. Either way, the resulting object will be used to initialize\n  // the regeneratorRuntime variable at the top of this file.\n  typeof module === \"object\" ? module.exports : {}\n));\n\ntry {\n  regeneratorRuntime = runtime;\n} catch (accidentalStrictMode) {\n  // This module should not be running in strict mode, so the above\n  // assignment should always work unless something is misconfigured. Just\n  // in case runtime.js accidentally runs in strict mode, we can escape\n  // strict mode using a global Function call. This could conceivably fail\n  // if a Content Security Policy forbids using Function, but in that case\n  // the proper solution is to fix the accidental strict mode problem. If\n  // you've misconfigured your bundler to force strict mode and applied a\n  // CSP to forbid Function, and you're not willing to fix either of those\n  // problems, please detail your unique predicament in a GitHub issue.\n  Function(\"r\", \"regeneratorRuntime = r\")(runtime);\n}\n","(function (global, undefined) {\n    \"use strict\";\n\n    if (global.setImmediate) {\n        return;\n    }\n\n    var nextHandle = 1; // Spec says greater than zero\n    var tasksByHandle = {};\n    var currentlyRunningATask = false;\n    var doc = global.document;\n    var registerImmediate;\n\n    function setImmediate(callback) {\n      // Callback can either be a function or a string\n      if (typeof callback !== \"function\") {\n        callback = new Function(\"\" + callback);\n      }\n      // Copy function arguments\n      var args = new Array(arguments.length - 1);\n      for (var i = 0; i < args.length; i++) {\n          args[i] = arguments[i + 1];\n      }\n      // Store and register the task\n      var task = { callback: callback, args: args };\n      tasksByHandle[nextHandle] = task;\n      registerImmediate(nextHandle);\n      return nextHandle++;\n    }\n\n    function clearImmediate(handle) {\n        delete tasksByHandle[handle];\n    }\n\n    function run(task) {\n        var callback = task.callback;\n        var args = task.args;\n        switch (args.length) {\n        case 0:\n            callback();\n            break;\n        case 1:\n            callback(args[0]);\n            break;\n        case 2:\n            callback(args[0], args[1]);\n            break;\n        case 3:\n            callback(args[0], args[1], args[2]);\n            break;\n        default:\n            callback.apply(undefined, args);\n            break;\n        }\n    }\n\n    function runIfPresent(handle) {\n        // From the spec: \"Wait until any invocations of this algorithm started before this one have completed.\"\n        // So if we're currently running a task, we'll need to delay this invocation.\n        if (currentlyRunningATask) {\n            // Delay by doing a setTimeout. setImmediate was tried instead, but in Firefox 7 it generated a\n            // \"too much recursion\" error.\n            setTimeout(runIfPresent, 0, handle);\n        } else {\n            var task = tasksByHandle[handle];\n            if (task) {\n                currentlyRunningATask = true;\n                try {\n                    run(task);\n                } finally {\n                    clearImmediate(handle);\n                    currentlyRunningATask = false;\n                }\n            }\n        }\n    }\n\n    function installNextTickImplementation() {\n        registerImmediate = function(handle) {\n            process.nextTick(function () { runIfPresent(handle); });\n        };\n    }\n\n    function canUsePostMessage() {\n        // The test against `importScripts` prevents this implementation from being installed inside a web worker,\n        // where `global.postMessage` means something completely different and can't be used for this purpose.\n        if (global.postMessage && !global.importScripts) {\n            var postMessageIsAsynchronous = true;\n            var oldOnMessage = global.onmessage;\n            global.onmessage = function() {\n                postMessageIsAsynchronous = false;\n            };\n            global.postMessage(\"\", \"*\");\n            global.onmessage = oldOnMessage;\n            return postMessageIsAsynchronous;\n        }\n    }\n\n    function installPostMessageImplementation() {\n        // Installs an event handler on `global` for the `message` event: see\n        // * https://developer.mozilla.org/en/DOM/window.postMessage\n        // * http://www.whatwg.org/specs/web-apps/current-work/multipage/comms.html#crossDocumentMessages\n\n        var messagePrefix = \"setImmediate$\" + Math.random() + \"$\";\n        var onGlobalMessage = function(event) {\n            if (event.source === global &&\n                typeof event.data === \"string\" &&\n                event.data.indexOf(messagePrefix) === 0) {\n                runIfPresent(+event.data.slice(messagePrefix.length));\n            }\n        };\n\n        if (global.addEventListener) {\n            global.addEventListener(\"message\", onGlobalMessage, false);\n        } else {\n            global.attachEvent(\"onmessage\", onGlobalMessage);\n        }\n\n        registerImmediate = function(handle) {\n            global.postMessage(messagePrefix + handle, \"*\");\n        };\n    }\n\n    function installMessageChannelImplementation() {\n        var channel = new MessageChannel();\n        channel.port1.onmessage = function(event) {\n            var handle = event.data;\n            runIfPresent(handle);\n        };\n\n        registerImmediate = function(handle) {\n            channel.port2.postMessage(handle);\n        };\n    }\n\n    function installReadyStateChangeImplementation() {\n        var html = doc.documentElement;\n        registerImmediate = function(handle) {\n            // Create a <script> element; its readystatechange event will be fired asynchronously once it is inserted\n            // into the document. Do so, thus queuing up the task. Remember to clean up once it's been called.\n            var script = doc.createElement(\"script\");\n            script.onreadystatechange = function () {\n                runIfPresent(handle);\n                script.onreadystatechange = null;\n                html.removeChild(script);\n                script = null;\n            };\n            html.appendChild(script);\n        };\n    }\n\n    function installSetTimeoutImplementation() {\n        registerImmediate = function(handle) {\n            setTimeout(runIfPresent, 0, handle);\n        };\n    }\n\n    // If supported, we should attach to the prototype of global, since that is where setTimeout et al. live.\n    var attachTo = Object.getPrototypeOf && Object.getPrototypeOf(global);\n    attachTo = attachTo && attachTo.setTimeout ? attachTo : global;\n\n    // Don't get fooled by e.g. browserify environments.\n    if ({}.toString.call(global.process) === \"[object process]\") {\n        // For Node.js before 0.9\n        installNextTickImplementation();\n\n    } else if (canUsePostMessage()) {\n        // For non-IE10 modern browsers\n        installPostMessageImplementation();\n\n    } else if (global.MessageChannel) {\n        // For web workers, where supported\n        installMessageChannelImplementation();\n\n    } else if (doc && \"onreadystatechange\" in doc.createElement(\"script\")) {\n        // For IE 6–8\n        installReadyStateChangeImplementation();\n\n    } else {\n        // For older browsers\n        installSetTimeoutImplementation();\n    }\n\n    attachTo.setImmediate = setImmediate;\n    attachTo.clearImmediate = clearImmediate;\n}(typeof self === \"undefined\" ? typeof global === \"undefined\" ? this : global : self));\n","var scope = (typeof global !== \"undefined\" && global) ||\n            (typeof self !== \"undefined\" && self) ||\n            window;\nvar apply = Function.prototype.apply;\n\n// DOM APIs, for completeness\n\nexports.setTimeout = function() {\n  return new Timeout(apply.call(setTimeout, scope, arguments), clearTimeout);\n};\nexports.setInterval = function() {\n  return new Timeout(apply.call(setInterval, scope, arguments), clearInterval);\n};\nexports.clearTimeout =\nexports.clearInterval = function(timeout) {\n  if (timeout) {\n    timeout.close();\n  }\n};\n\nfunction Timeout(id, clearFn) {\n  this._id = id;\n  this._clearFn = clearFn;\n}\nTimeout.prototype.unref = Timeout.prototype.ref = function() {};\nTimeout.prototype.close = function() {\n  this._clearFn.call(scope, this._id);\n};\n\n// Does not start the time, just sets up the members needed.\nexports.enroll = function(item, msecs) {\n  clearTimeout(item._idleTimeoutId);\n  item._idleTimeout = msecs;\n};\n\nexports.unenroll = function(item) {\n  clearTimeout(item._idleTimeoutId);\n  item._idleTimeout = -1;\n};\n\nexports._unrefActive = exports.active = function(item) {\n  clearTimeout(item._idleTimeoutId);\n\n  var msecs = item._idleTimeout;\n  if (msecs >= 0) {\n    item._idleTimeoutId = setTimeout(function onTimeout() {\n      if (item._onTimeout)\n        item._onTimeout();\n    }, msecs);\n  }\n};\n\n// setimmediate attaches itself to the global object\nrequire(\"setimmediate\");\n// On some exotic environments, it's not clear which object `setimmediate` was\n// able to install onto.  Search each possibility in the same order as the\n// `setimmediate` library.\nexports.setImmediate = (typeof self !== \"undefined\" && self.setImmediate) ||\n                       (typeof global !== \"undefined\" && global.setImmediate) ||\n                       (this && this.setImmediate);\nexports.clearImmediate = (typeof self !== \"undefined\" && self.clearImmediate) ||\n                         (typeof global !== \"undefined\" && global.clearImmediate) ||\n                         (this && this.clearImmediate);\n","/* globals __webpack_amd_options__ */\nmodule.exports = __webpack_amd_options__;\n","var g;\n\n// This works in non-strict mode\ng = (function() {\n\treturn this;\n})();\n\ntry {\n\t// This works if eval is allowed (see CSP)\n\tg = g || new Function(\"return this\")();\n} catch (e) {\n\t// This works if the window reference is available\n\tif (typeof window === \"object\") g = window;\n}\n\n// g can still be undefined, but nothing to do about it...\n// We return undefined, instead of nothing here, so it's\n// easier to handle this case. if(!global) { ...}\n\nmodule.exports = g;\n","module.exports = function(module) {\n\tif (!module.webpackPolyfill) {\n\t\tmodule.deprecate = function() {};\n\t\tmodule.paths = [];\n\t\t// module.parent = undefined by default\n\t\tif (!module.children) module.children = [];\n\t\tObject.defineProperty(module, \"loaded\", {\n\t\t\tenumerable: true,\n\t\t\tget: function() {\n\t\t\t\treturn module.l;\n\t\t\t}\n\t\t});\n\t\tObject.defineProperty(module, \"id\", {\n\t\t\tenumerable: true,\n\t\t\tget: function() {\n\t\t\t\treturn module.i;\n\t\t\t}\n\t\t});\n\t\tmodule.webpackPolyfill = 1;\n\t}\n\treturn module;\n};\n","export function getLoadModelData(url, lmvFileExtension, returnValue, node) {\n  var global = Autodesk.Viewing.getGlobal();\n  var dataToTrack = {\n    url: url,\n    lmvFileExtension: lmvFileExtension,\n    returnValue: returnValue };\n\n\n  if (node) {\n    dataToTrack['isOtg'] = node.isOtg();\n    dataToTrack['geometrySize'] = node.data.size || 0;\n\n    // seed file info\n    var viewable = node.findViewableParent();\n    try {\n      var name = viewable && viewable.name();\n      var pos = name && name.lastIndexOf('.');\n      var ext = pos >= 0 && name.substring(pos + 1);\n      if (ext) {\n        dataToTrack['seedFileExt'] = ext.toLowerCase();\n      }\n\n    } catch (e) {\n    }\n\n  }\n\n  return dataToTrack;\n}","function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}import {\nlogger } from\n'../logger/Logger';\nimport {\nanalyticsProvidersExtensions as extensions } from\n'./providers/providersExtensions';\n\nvar STATES = {\n  NOT_REGISTERED: 0,\n  REGISTERING_ONLY: 1,\n  REGISTERING_AND_OPTING_IN: 2,\n  REGISTERED: 3,\n  FAILED_TO_REGISTER: 4 };var\n\n\nViewerAnalytics = /*#__PURE__*/function () {\n  function ViewerAnalytics() {var _this = this;_classCallCheck(this, ViewerAnalytics);\n    this.providers = {};\n\n    Object.keys(extensions).forEach(function (name) {\n      _this.providers[name] = {\n        instance: null,\n        extensionId: extensions[name],\n        state: STATES.NOT_REGISTERED,\n        cache: [] };\n\n    });\n  }\n\n  /**\n     * @param {object} props - properties that are sent with every track request\n     */_createClass(ViewerAnalytics, [{ key: \"setSuperProps\", value: function setSuperProps(\n    props) {\n      this.superProps = props;\n    } }, { key: \"register\", value: function register()\n\n    {var _this2 = this;var names = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 'all';var callback = arguments.length > 1 ? arguments[1] : undefined;\n      var providers = names === 'all' ? Object.keys(this.providers) : Array.isArray(names) ? names : [names];\n\n      providers.forEach(function (name) {\n        if (_this2.providers[name].state === STATES.REGISTERED) {\n          logger.warn(\"Analytics provider '\".concat(name, \"' is already registered\"));\n          if (callback) {\n            callback(name);\n          }\n        } else {\n          if (!_this2.providers[name]) {\n            throw new Error(\"Provider '\".concat(name, \"' has no extensions mapped to register\"));\n          }\n\n          if (_this2.providers[name].state === STATES.REGISTERING_ONLY) {\n            logger.warn(\"Analytics provider '\".concat(name, \"' is already being registered\"));\n            return;\n          }\n\n          if (!callback) {\n            _this2.providers[name].state = STATES.REGISTERING_ONLY;\n          }\n\n          Autodesk.Viewing.theExtensionManager.downloadExtension(_this2.providers[name].extensionId).then(function (extension) {\n            try {\n              var provider = new extension.providerClass(extension.providerOptions);\n              provider.init();\n\n              if (_this2.superProps) {\n                provider.register(_this2.superProps);\n              }\n\n              _this2.providers[name].instance = provider;\n\n              if (callback) {\n                callback(name);\n              }\n\n              _this2.providers[name].state = STATES.REGISTERED;\n              logger.info(\"Analytics provider '\".concat(provider.name, \"' successfully registered\"));\n\n\n              if (_this2.providers[name].cache.length > 0) {\n                _this2.providers[name].cache.forEach(function (data) {\n                  _this2.providers[name].instance.track(data.event, data.properties);\n                });\n\n                _this2.providers[name].cache = [];\n              }\n\n            } catch (e) {\n              _this2.providers[name].state = STATES.FAILED_TO_REGISTER;\n              _this2.providers[name].cache = [];\n\n              logger.error(\"Failed to register analytics provider: \\\"\".concat(name, \"\\\"\"), e);\n            }\n          });\n        }\n      });\n    } }, { key: \"optIn\", value: function optIn(\n\n    options) {var _this3 = this;var names = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'all';\n      var providersNames = names === 'all' ? Object.keys(this.providers) : Array.isArray(names) ? names : [names];\n\n      providersNames.forEach(function (providerName) {\n        logger.info(\"Trying to opt-in analytics provider '\".concat(providerName, \"'\"));\n\n        var registerProviderCallback = function registerProviderCallback(name) {\n          if (_this3.providers[name].state === STATES.REGISTERING_AND_OPTING_IN) {\n            _this3.providers[name].state = STATES.REGISTERED;\n          }\n\n          if (_this3.providers[name].state !== STATES.REGISTERED) {\n            throw new Error(\"Analytics provider '\".concat(name, \"' can not be opted-in because is not registered\"));\n          } else if (_this3.providers[name].instance.hasOptedOut()) {\n            _this3.providers[name].instance.optIn(options);\n            logger.info(\"Analytics provider '\".concat(name, \"' opted-in\"));\n          } else {\n            logger.warn(\"Analytics provider '\".concat(name, \"' is already opted-in\"));\n          }\n        };\n\n        if (!_this3.providers[providerName]) {\n          throw new Error(\"No extension for '\".concat(providerName, \"' analytics available\"));\n        }\n\n        switch (_this3.providers[providerName].state) {\n          case STATES.REGISTERED: //Try to opt-in if is already loaded\n            registerProviderCallback(providerName);\n            break;\n\n          case STATES.FAILED_TO_REGISTER:\n            throw new Error(\"Can't opt-in '\".concat(providerName, \"' because registering failed\"));\n\n          case STATES.NOT_REGISTERED: //If is not registered, do that\n          case STATES.REGISTERING_ONLY: //Is being registered by someone, but not trying to be opted-in, try to opt-in\n            _this3.providers[providerName].state = STATES.REGISTERING_AND_OPTING_IN;\n            _this3.register(providerName, registerProviderCallback);\n            break;\n\n          case STATES.REGISTERING_AND_OPTING_IN: //Already listening with a callback\n          default:\n            return;}\n\n      });\n    } }, { key: \"optOut\", value: function optOut(\n\n    options) {var names = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'all';\n      this._getProviders(names).forEach(function (p) {return p.instance.optOut(options);});\n    } }, { key: \"hasOptedOut\", value: function hasOptedOut(\n\n    name) {\n      this._checkUniqueProviderName(name);\n      name = name.toLowerCase();\n\n      var provider = this._getProviders(name)[0];\n      return provider.instance.hasOptedOut();\n    } }, { key: \"getDistinctId\", value: function getDistinctId(\n\n    name) {\n      this._checkUniqueProviderName(name);\n      name = name.toLowerCase();\n\n      var provider = this._getProviders(name)[0];\n      return provider.instance.getDistinctId();\n    } }, { key: \"track\", value: function track(\n\n    event, properties) {var _this4 = this;var names = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 'all';\n      var providerNames = names === 'all' ? Object.keys(this.providers) : Array.isArray(names) ? names : [names];\n\n      providerNames.forEach(function (providerName) {\n\n        if (!_this4.providers[providerName]) {\n          throw new Error(\"Analytics provider '\".concat(providerName, \"' has no extension available to load\"));\n        } else if (_this4.providers[providerName].state === STATES.REGISTERED) {\n          _this4.providers[providerName].instance.track(event, properties);\n        } else if (_this4.providers[providerName].state === STATES.REGISTERING_ONLY) {\n          var data = { //Data to track later\n            event: event,\n            properties: properties };\n\n\n          _this4.providers[providerName].cache.push(data);\n        } //STATES.UNLOADED or STATES.FAILED are ignored\n\n      });\n    } }, { key: \"identify\", value: function identify(\n\n    distinctId) {var names = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'all';\n      this._getProviders(names).forEach(function (p) {return p.instance.identify(distinctId);});\n    } }, { key: \"_checkUniqueProviderName\", value: function _checkUniqueProviderName(\n\n    name) {\n      if (typeof name !== 'string' || name === '') {\n        throw new Error(\"Analytics provider must be a registered non-empty string\");\n      } else if (name === 'all') {\n        throw new Error(\"Analytics provider name cannot be 'all'\");\n      }\n    } }, { key: \"_getProviders\", value: function _getProviders(\n\n    names) {var _this5 = this;\n      var keys;\n\n      if (Array.isArray(names)) {\n        keys = names.map(function (x) {return x.toLowerCase();});\n      } else if (names === 'all') {\n        keys = Object.keys(this.providers);\n      } else {\n        keys = [names.toLowerCase()];\n      }\n\n      keys.forEach(function (name) {\n\n        if (!(name in _this5.providers)) {\n          throw new Error(\"Analytics provider '\".concat(name, \"' has no extension to load\"));\n        } else if (_this5.providers[name].state === STATES.REGISTERING_ONLY) {\n          throw new Error(\"Analytics provider '\".concat(name, \"' is being registered\"));\n        } else if (_this5.providers[name].state === STATES.NOT_REGISTERED) {\n          throw new Error(\"Analytics provider '\".concat(name, \"' is not registered\"));\n        } else if (_this5.providers[name].state === STATES.FAILED_TO_REGISTER) {\n          throw new Error(\"Analytics provider '\".concat(name, \"' could not be registered\"));\n        }\n\n      });\n\n      return keys.map(function (k) {return _this5.providers[k];});\n    } }]);return ViewerAnalytics;}();\n\n\nvar instance = new ViewerAnalytics();\nexport {\ninstance as analytics };","function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}var AnalyticsProviderInterface = /*#__PURE__*/function () {\n  function AnalyticsProviderInterface() {var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};_classCallCheck(this, AnalyticsProviderInterface);\n    this.options = options;\n  }\n  /**\n     * Called by ViewerAnalytics to register this provider\n     * Implementer should throw an error on failure\n     */_createClass(AnalyticsProviderInterface, [{ key: \"init\", value: function init()\n    {}\n\n    /**\n        * Called after init. This could be used to register super properties\n        */ }, { key: \"register\", value: function register()\n    {} }, { key: \"optIn\", value: function optIn(\n\n    options) {} }, { key: \"optOut\", value: function optOut(\n    options) {} }, { key: \"hasOptedOut\", value: function hasOptedOut()\n    {} }, { key: \"getDistinctId\", value: function getDistinctId()\n    {} }, { key: \"track\", value: function track(\n    event, properties) {} }, { key: \"identify\", value: function identify(\n    distinctId) {} }, { key: \"name\", get: function get() {} }]);return AnalyticsProviderInterface;}();export { AnalyticsProviderInterface as default };\n\n\nvar namespace = AutodeskNamespace('Autodesk.Viewing.Private');\nnamespace.AnalyticsProviderInterface = AnalyticsProviderInterface;","var analyticsProvidersExtensions = {\n  'mixpanel': 'Autodesk.Viewing.MixpanelExtension' };\n\n\nvar namespace = AutodeskNamespace('Autodesk.Viewing.Private.analytics');\nnamespace.ProvidersExtensions = analyticsProvidersExtensions;\n\nexport {\nanalyticsProvidersExtensions };","\nimport { INTERPOLATION_TYPE } from './InterpolationType';\nimport { GlobalManagerMixin } from '../../src/application/GlobalManagerMixin';\n\n/**\n                                                                                * Base class for all Animation types\n                                                                                * @param {*} root \n                                                                                * @param {*} data \n                                                                                * @param {*} animator \n                                                                                */\nexport function Animation(root, data, animator) {\n  this.root = root;\n  this.handler = animator.animationHandler;\n  this.data = this.handler.init(data);\n  this.hierarchy = this.handler.parse(root);\n  this.viewer = animator.viewer;\n  this.animator = animator;\n\n  this.currentTime = 0;\n  this.timeScale = 1;\n\n  this.isPlaying = false;\n  this.isPaused = true;\n  this.loop = false;\n  this.delta = 0.5;\n\n  this.interpolationType = INTERPOLATION_TYPE.LINEAR;\n\n  this.setStartAndEndKeyTime();\n};\n\nGlobalManagerMixin.call(Animation.prototype);\n\nAnimation.prototype.setStartAndEndKeyTime = function () {\n  if (this.data.hierarchy.length > 0) {\n    // root of hierarchy should have key time covering animation\n    var keys = this.data.hierarchy[0].keys;\n    this.startKeyTime = keys[0].time;\n    this.endKeyTime = keys[keys.length - 1].time;\n  } else {\n    this.startKeyTime = this.endKeyTime = 0;\n  }\n};\n\nAnimation.prototype.keyTypes = [];\nAnimation.prototype.defaultKey = {};\n\nAnimation.prototype.play = function (startTime) {\n  this.currentTime = startTime !== undefined ? startTime : 0;\n  this.isPlaying = true;\n  this.isPaused = false;\n  this.reset();\n  this.handler.play(this);\n};\n\nAnimation.prototype.pause = function () {\n  if (this.isPaused === true) {\n    this.handler.play(this);\n  } else {\n    this.handler.stop(this);\n  }\n  this.isPaused = !this.isPaused;\n};\n\nAnimation.prototype.stop = function () {\n  this.isPlaying = false;\n  this.isPaused = false;\n  this.handler.stop(this);\n};\n\nAnimation.prototype.goto = function (time) {\n  if (!this.isPlaying) this.play();\n  if (!this.isPaused) this.pause();\n  var delta = time - this.currentTime;\n  this.update(delta);\n};\n\nAnimation.prototype.reset = function () {\n  for (var h = 0, hl = this.hierarchy.length; h < hl; h++) {\n    var object = this.hierarchy[h];\n\n    if (object.animationCache === undefined) {\n      object.animationCache = {};\n    }\n\n    if (object.animationCache[this.data.name] === undefined) {\n      object.animationCache[this.data.name] = {\n        prevKey: this.defaultKey,\n        nextKey: this.defaultKey,\n        originalMatrix: object.matrix };\n\n    }\n\n    // get keys to match our current time\n    var animationCache = object.animationCache[this.data.name];\n    for (var t = 0; t < this.keyTypes.length; t++) {\n      var type = this.keyTypes[t];\n      var prevKey = this.data.hierarchy[h].keys[0];\n      var nextKey = this.getNextKeyWith(type, h, 1);\n      while (nextKey.time < this.currentTime && nextKey.index > prevKey.index) {\n        prevKey = nextKey;\n        nextKey = this.getNextKeyWith(type, h, nextKey.index + 1);\n      }\n      animationCache.prevKey[type] = prevKey;\n      animationCache.nextKey[type] = nextKey;\n    }\n  }\n\n  this.setStartAndEndKeyTime();\n};\n\nAnimation.prototype.getNextKeyWith = function (type, h, key) {\n  var keys = this.data.hierarchy[h].keys;\n  if (this.interpolationType === INTERPOLATION_TYPE.CATMULLROM ||\n  this.interpolationType === INTERPOLATION_TYPE.CATMULLROM_FORWARD) {\n    key = key < keys.length - 1 ? key : keys.length - 1;\n  } else {\n    key = key % keys.length;\n  }\n\n  for (; key < keys.length; key++) {\n    if (keys[key][type] !== undefined) {\n      return keys[key];\n    }\n  }\n  return this.data.hierarchy[h].keys[0];\n};\n\nAnimation.prototype.getPrevKeyWith = function (type, h, key) {\n  var keys = this.data.hierarchy[h].keys;\n  if (this.interpolationType === INTERPOLATION_TYPE.CATMULLROM ||\n  this.interpolationType === INTERPOLATION_TYPE.CATMULLROM_FORWARD) {\n    key = key > 0 ? key : 0;\n  } else {\n    key = key >= 0 ? key : key + keys.length;\n  }\n\n  for (; key >= 0; key--) {\n    if (keys[key][type] !== undefined) {\n      return keys[key];\n    }\n  }\n  return this.data.hierarchy[h].keys[keys.length - 1];\n};\n\nAnimation.prototype.isPlayingOutOfRange = function () {\n  return this.isPaused === false && (this.currentTime < this.startKeyTime - this.delta ||\n  this.currentTime > this.endKeyTime + this.delta);\n};\n\nAnimation.prototype.resetIfLooped = function () {\n  if (this.loop === true && this.currentTime > this.endKeyTime) {\n    this.currentTime %= this.endKeyTime;\n    this.reset();\n  }\n};\n\n// Catmull-Rom spline\nexport function interpolateCatmullRom(points, scale) {\n  function interpolate(p0, p1, p2, p3, t, t2, t3) {\n    var v0 = (p2 - p0) * 0.5,\n    v1 = (p3 - p1) * 0.5;\n\n    return (2 * (p1 - p2) + v0 + v1) * t3 + (-3 * (p1 - p2) - 2 * v0 - v1) * t2 + v0 * t + p1;\n  }\n\n  var c = [],v3 = [],\n  point,intPoint,weight,w2,w3,\n  pa,pb,pc,pd;\n\n  point = (points.length - 1) * scale;\n  intPoint = Math.floor(point);\n  weight = point - intPoint;\n\n  c[0] = intPoint === 0 ? intPoint : intPoint - 1;\n  c[1] = intPoint;\n  c[2] = intPoint > points.length - 2 ? intPoint : intPoint + 1;\n  c[3] = intPoint > points.length - 3 ? intPoint : intPoint + 2;\n\n  pa = points[c[0]];\n  pb = points[c[1]];\n  pc = points[c[2]];\n  pd = points[c[3]];\n\n  w2 = weight * weight;\n  w3 = weight * w2;\n\n  v3[0] = interpolate(pa[0], pb[0], pc[0], pd[0], weight, w2, w3);\n  v3[1] = interpolate(pa[1], pb[1], pc[1], pd[1], weight, w2, w3);\n  v3[2] = interpolate(pa[2], pb[2], pc[2], pd[2], weight, w2, w3);\n\n  return v3;\n}","export function AnimationHandler() {\n  this.animations = [];\n}\n\nAnimationHandler.prototype.init = function (data) {\n  // return same data if initialized\n  if (data.initialized === true) return data;\n\n  // loop through all keys\n  for (var h = 0; h < data.hierarchy.length; h++) {\n    for (var k = 0; k < data.hierarchy[h].keys.length; k++) {\n      // remove minus times\n      if (data.hierarchy[h].keys[k].time < 0) {\n        data.hierarchy[h].keys[k].time = 0;\n      }\n\n      // create quaternions\n      if (data.hierarchy[h].keys[k].rot !== undefined &&\n      !(data.hierarchy[h].keys[k].rot instanceof THREE.Quaternion)) {\n        var quat = data.hierarchy[h].keys[k].rot;\n        if (!Array.isArray(quat)) {\n          quat = [quat._x, quat._y, quat._z, quat._w];\n        }\n        data.hierarchy[h].keys[k].rot = new THREE.Quaternion().fromArray(quat);\n      }\n    }\n\n    // remove all keys with same time\n    for (var k = 1; k < data.hierarchy[h].keys.length; k++) {\n      if (data.hierarchy[h].keys[k].time === data.hierarchy[h].keys[k - 1].time) {\n        data.hierarchy[h].keys.splice(k, 1);\n        k--;\n      }\n    }\n\n    // set index\n    for (var k = 0; k < data.hierarchy[h].keys.length; k++) {\n      data.hierarchy[h].keys[k].index = k;\n    }\n  }\n  data.initialized = true;\n  return data;\n};\n\nAnimationHandler.prototype.parse = function (root) {\n  function parseRecurseHierarchy(root, hierarchy) {\n    hierarchy.push(root);\n\n    // check Object3D.children if not defined\n    // do not animate camera's light node\n    if (root.children && !(root instanceof THREE.Camera)) {\n      for (var c = 0; c < root.children.length; c++) {\n        parseRecurseHierarchy(root.children[c], hierarchy);}\n    }\n  }\n  var hierarchy = [];\n  parseRecurseHierarchy(root, hierarchy);\n  return hierarchy;\n};\n\nAnimationHandler.prototype.play = function (animation) {\n  if (this.animations.indexOf(animation) === -1) {\n    this.animations.push(animation);\n  }\n};\n\nAnimationHandler.prototype.stop = function (animation) {\n  var index = this.animations.indexOf(animation);\n  if (index !== -1) {\n    this.animations.splice(index, 1);\n  }\n};\n\nAnimationHandler.prototype.update = function (deltaTimeMS) {\n  for (var i = 0; i < this.animations.length; i++) {\n    this.animations[i].update(deltaTimeMS);\n  }\n};","export var INTERPOLATION_TYPE = {\n  LINEAR: 0,\n  CATMULLROM: 1,\n  CATMULLROM_FORWARD: 2 };","\nimport { AnimationHandler } from './AnimationHandler';\nimport { MeshAnimation } from './type/MeshAnimation';\nimport { CameraAnimation } from './type/CameraAnimation';\nimport { VisibilityAnimation } from './type/VisibilityAnimation';\nimport { AnnotationAnimation } from './type/AnnotationAnimation';\nimport { PolylineAnimation } from \"./type/PolylineAnimation\";\nimport { GlobalManagerMixin } from '../application/GlobalManagerMixin';\n\n/**\n                                                                         *  This is the keyframe animator class that performs keyframe animation\n                                                                         *\n                                                                         *  @constructor\n                                                                         *  @alias Autodesk.Viewing.Private.KeyFrameAnimator\n                                                                         *  @param {Viewer3DImpl} viewer The viewer\n                                                                         *  @param {number} duration The duration of the animation in seconds\n                                                                         * *@param {GlobalManager} GlobalManager instance from the viewer\n                                                                         */\nexport function KeyFrameAnimator(viewer, duration) {\n  this.animations = [];\n  this.viewer = viewer;\n  this.setGlobalManager(viewer.globalManager);\n  this.keys = [];\n  this.isPlaying = false;\n  this.isPaused = true;\n  this.updateFlag = 0;\n  this.duration = duration;\n  this.currentTime = 0;\n  this.onPlayCallback = null;\n  this.animationHandler = new AnimationHandler();\n  this.areCameraAnimationsPaused = false;\n  this.UPDATE_SCENE = 1;\n  this.UPDATE_CAMERA = 2;\n  this.followCam = true;\n  this._speedMod = 1.0;\n  this._loops = false;\n};\n\nGlobalManagerMixin.call(KeyFrameAnimator.prototype);\n\n/**\n                                                      * Destructor. Releasing references to other objects.\n                                                      */\nKeyFrameAnimator.prototype.destroy = function () {\n  this.stop();\n  this.viewer = null;\n  this.keys = null;\n  this.animations = null;\n  this.isPlaying = false;\n  this.isPaused = false;\n  this.animationHandler = null;\n};\n\n/**\n    * Add an animation to the keyframe animator\n    *\n    * @param {object} animation The animation object to add\n    */\nKeyFrameAnimator.prototype.add = function (animation) {var _this = this;\n  // return if animation has no hierarchy data or less than two keys\n  if (!animation.hierarchy || animation.hierarchy.length < 1 || !animation.hierarchy[0].keys ||\n  animation.hierarchy[0].keys.length < 2)\n  return;\n\n  var anim = null;\n  var that = this;\n  if (animation.type === \"camera\") {\n    anim = new CameraAnimation(that.viewer.camera, animation, that);\n    that.animations.push(anim);\n  } else\n  if (animation.type === \"annotation\") {\n    anim = new AnnotationAnimation(null, animation, that);\n    that.animations.push(anim);\n  } else\n  if (animation.type === \"polyline\") {\n    anim = new PolylineAnimation(null, animation, that);\n    that.animations.push(anim);\n  } else\n  if (animation.type === \"mesh\") {\n\n    that.viewer.model.getData().instanceTree.enumNodeFragments(animation.id, function (fragId) {\n\n      var mesh = that.viewer.getFragmentProxy(that.viewer.model, fragId);\n      if (mesh) {\n        // meshes of the node will share same data\n        anim = new MeshAnimation(mesh, animation, that);\n        that.animations.push(anim);\n      }\n\n    }, true);\n\n  } else if (animation.type === \"visibility\") {\n    anim = new VisibilityAnimation(animation, animation.id, that);\n    that.animations.push(anim);\n  }\n\n  that.animations.forEach(function (anim) {return anim.setGlobalManager(_this.globalManager);});\n\n\n  // sort and remove duplicates\n  function sortAndRemoveDuplicateKeys(keys) {\n    function removeDuplicates(a, b, c) {\n      b = a.length;while (c = --b) {while (c--) {a[b] !== a[c] || a.splice(c, 1);}}\n    }\n\n    // sort keys\n    keys.sort(function (a, b) {return a - b;});\n\n    // remove duplicates\n    removeDuplicates(keys);\n  }\n\n  if (anim) {\n    // add keys\n    for (var h = 0, hl = animation.hierarchy.length; h < hl; h++) {\n      var keys = animation.hierarchy[h].keys;\n      for (var i = 0; i < keys.length; i++) {\n        // add user defined (non extra) keys\n        if (keys[i].xk === undefined)\n        that.keys.push(keys[i].time);\n      }\n    }\n    sortAndRemoveDuplicateKeys(that.keys);\n  }\n\n  this.updateFlag |= this.UPDATE_SCENE;\n};\n\n/**\n    * Update all animations in the keyframe animator\n    *\n    * @param {number} time The time in second to advance\n    * @return {number} 0 for no update, 1 for scene, 2 for camera, 3 for both\n    */\nKeyFrameAnimator.prototype.update = function (time) {\n  time = time * this._speedMod;\n  this.animationHandler.update(time);\n  var update = this.updateFlag;\n  if (this.isPlaying && !this.isPaused) {\n    this.currentTime += time;\n    this.currentTime = Math.min(this.currentTime, this.duration);\n    if (this.onPlayCallback) {\n      // send playback percentage\n      this.onPlayCallback(this.duration > 0 ? this.currentTime / this.duration * 100 : 0);\n    }\n    if (this.currentTime >= this.duration) {\n      if (this._loops) {\n        this.play(0, this.onPlayCallback);\n      } else {\n        this.pause();\n      }\n    }\n    update |= this.UPDATE_SCENE;\n  }\n  this.updateFlag = 0;\n  return update;\n};\n\n/**\n    * Play all animations\n    *\n    * @param {number} startTime The time in second to start\n    */\nKeyFrameAnimator.prototype.play = function (startTime, onPlayCallback) {\n  this.onPlayCallback = onPlayCallback;\n\n  // auto-rewind and play if reached the end\n  if (this.currentTime >= this.duration) {\n    this.goto(0);\n  }\n\n  if (this.isPlaying) {\n    this.pause();\n    return;\n  }\n\n  for (var i = 0; i < this.animations.length; i++) {\n    var animation = this.animations[i];\n    animation.play(startTime);\n  }\n\n  this.isPlaying = true;\n  this.isPaused = false;\n};\n\n/**\n    * Whether a playing animation updates the camera position.\n    * \n    * @param {boolean} followCam - true to allow animation to update camera position (default behavior).\n    */\nKeyFrameAnimator.prototype.setFollowCamera = function (followCam) {\n  this.followCam = followCam;\n  for (var i = 0; i < this.animations.length; i++) {\n    var animation = this.animations[i];\n    animation.setFollowCamera && animation.setFollowCamera(followCam);\n  }\n};\n\n/**\n    * @returns {boolean} Whether animations will update the camera's position (true) or not (false).\n    */\nKeyFrameAnimator.prototype.isFollowingCamera = function () {\n  return this.followCam;\n};\n\n/**\n    * Changes the speed at which the animation is played. Use value 1 to run the \n    * animation at default speed, use value 2 to run it at double the speed, \n    * use value 0.5 to run it at half the speed.\n    * \n    * @param {number} value - A multiplier for the animation's elapsed time.\n    */\nKeyFrameAnimator.prototype.setSpeedModifier = function (value) {\n  this._speedMod = value;\n};\n\n/**\n    * @returns {number} The playback speed multiplier.\n    */\nKeyFrameAnimator.prototype.getSpeedModifier = function () {\n  return this._speedMod;\n};\n\n/**\n    * Sets whether the animation rewinds and plays as soon as the animation\n    * finishes playing.\n    * \n    * @param {boolean} loop - true to have the animation loop continuously.\n    */\nKeyFrameAnimator.prototype.setLooping = function (loop) {\n  this._loops = loop;\n};\n\n/**\n    * @returns {boolean} Whether the animation will loop continuously.\n    */\nKeyFrameAnimator.prototype.isLooping = function () {\n  return this._loops;\n};\n\n/**\n    * Pause all animations\n    *\n    */\nKeyFrameAnimator.prototype.pause = function () {\n  for (var i = 0; i < this.animations.length; i++) {\n    var animation = this.animations[i];\n    // pause sync with same state\n    if (animation.isPaused === this.isPaused) {\n      animation.pause();\n    }\n  }\n\n  this.isPaused = !this.isPaused;\n  this.areCameraAnimationsPaused = this.isPaused;\n};\n\n/**\n    * Pause camera animations\n    *\n    */\nKeyFrameAnimator.prototype.pauseCameraAnimations = function () {\n  for (var i = 0; i < this.animations.length; i++) {\n    var animation = this.animations[i];\n    if (animation instanceof CameraAnimation) {\n      animation.pause();\n    }\n  }\n\n  this.areCameraAnimationsPaused = !this.areCameraAnimationsPaused;\n};\n\n/**\n    * Stop all animations\n    *\n    */\nKeyFrameAnimator.prototype.stop = function () {\n  for (var i = 0; i < this.animations.length; i++) {\n    var animation = this.animations[i];\n    animation.stop();\n  }\n\n  this.isPlaying = false;\n  this.isPaused = false;\n};\n\n/**\n    * Goto specific time in the animation\n    *\n    * @param {number} time The specific time in second\n    */\nKeyFrameAnimator.prototype.goto = function (time) {\n  if (time === undefined) return;\n  for (var i = 0; i < this.animations.length; i++) {\n    var animation = this.animations[i];\n    animation.goto(time);\n  }\n\n  this.isPlaying = true;\n  this.isPaused = true;\n  this.currentTime = time;\n  this.updateFlag |= this.UPDATE_SCENE;\n};\n\n/**\n    * Step forward to next key\n    *\n    */\nKeyFrameAnimator.prototype.next = function () {\n  // find next key time\n  function findNextKey(time, keys) {\n    var key = -1;\n    for (var t = 0; t < keys.length; t++) {\n      if (keys[t] > time) {\n        key = keys[t];\n        break;\n      }\n    }\n    return key < 0 ? keys[keys.length - 1] : key;\n  }\n  var time = findNextKey(this.currentTime, this.keys);\n  this.goto(time);\n};\n\n/**\n    * Step backward to previous key\n    *\n    */\nKeyFrameAnimator.prototype.prev = function () {\n  // find previous key time\n  function findPrevKey(time, keys) {\n    var key = -1;\n    for (var t = keys.length - 1; t > -1; t--) {\n      if (keys[t] < time) {\n        key = keys[t];\n        break;\n      }\n    }\n    return key < 0 ? keys[0] : key;\n  }\n  var time = findPrevKey(this.currentTime, this.keys);\n  this.goto(time);\n};","import * as THREE from \"three\";\nimport { INTERPOLATION_TYPE } from '../InterpolationType';\nimport { Animation, interpolateCatmullRom } from '../Animation';\n\nexport function AnnotationAnimation(root, data, animator) {\n  function createAnnotation(data, viewer, state) {\n    var _document = this.getDocument();\n    var container = that.container = _document.createElement('div');\n    var name = data.name;\n    container.id = name;\n    container.style.cursor = \"pointer\";\n    container.style.visibility = state;\n\n    var text = _document.createElement('div');\n    text.id = name + '-txt';\n    text.style.cssText = 'display: none;position: absolute;z-index: 1;';\n    container.appendChild(text);\n\n    var icon = _document.createElement('img');\n    var isAttached = data.custom && data.custom.att && data.custom.att === 1;\n    icon.src = isAttached ? \"data:image/png;base64,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\" :\n    \"data:image/png;base64,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\";\n    icon.id = name + '-img';\n    icon.style.cssText = 'display: block;position: absolute;z-index: 1;';\n    container.appendChild(icon);\n\n    viewer.api.container.appendChild(container);\n\n    container.addEventListener('click', function () {\n      text.style.display = text.style.display === 'none' ? 'block' : 'none';\n    });\n\n    var color = 0x007F00;\n    var opacity = 0.6;\n    var geometry = new THREE.SphereGeometry(0.01);\n    var material = new THREE.MeshPhongMaterial({ color: color, ambient: color, opacity: opacity, transparent: true });\n    var mesh = new THREE.Mesh(geometry, material);\n    mesh.visible = false;\n\n    if (viewer.overlayScenes[\"annotation\"] === undefined) {\n      // add annotation to an overlay scene\n      viewer.createOverlayScene(\"annotation\");\n    }\n    viewer.addOverlay(\"annotation\", mesh);\n\n    return mesh;\n  }\n\n  var that = this;\n  if (root === null) {\n    root = createAnnotation.call(this, data, animator.viewer, 'hidden');\n  }\n  Animation.call(this, root, data, animator);\n  this.id = data.name;\n  this.text = \"\";\n  this.state = 'hidden';\n  this.epsilon = 0.1;\n\n  this.viewer.api.addEventListener(Autodesk.Viewing.CAMERA_CHANGE_EVENT, function (evt) {\n    that.updateText(root.position, that.text);\n  });\n};\n\nAnnotationAnimation.prototype = Object.create(Animation.prototype);\nAnnotationAnimation.prototype.constructor = AnnotationAnimation;\nAnnotationAnimation.prototype.keyTypes = [\"pos\", \"text\", \"vis\"];\nAnnotationAnimation.prototype.defaultKey = { pos: 0, text: \"\", vis: 1 };\n\nAnnotationAnimation.prototype.stop = function () {\n  Animation.prototype.stop.call(this);\n  this.container.parentNode.removeChild(this.container);\n  this.viewer.removeOverlay(\"annotation\", this.root);\n  this.root = null;\n};\n\nAnnotationAnimation.prototype.updateText = function (position, text) {\n  function projectToScreen(position, camera, canvas) {\n    var pos = position.clone();\n    var projScreenMat = new THREE.Matrix4();\n    camera.updateMatrixWorld();\n    camera.matrixWorldInverse.getInverse(camera.matrixWorld);\n    projScreenMat.multiplyMatrices(camera.projectionMatrix, camera.matrixWorldInverse);\n    pos.applyProjection(projScreenMat);\n\n    // Center the icon (24x24) on the desired point.\n    return { x: (pos.x + 1) * canvas.width / 2 + canvas.offsetLeft - 12,\n      y: (-pos.y + 1) * canvas.height / 2 + canvas.offsetTop + 12 };\n  }\n  var coord = projectToScreen(position, this.viewer.camera, this.viewer.canvas);\n  var _document = this.getDocument();\n  var element = _document.getElementById(this.id + '-txt');\n  if (element) {\n    element.innerHTML = text;\n    element.style.left = coord.x + 'px';\n    element.style.top = coord.y + 'px';\n    this.text = text;\n  }\n  element = _document.getElementById(this.id + '-img');\n  if (element) {\n    element.style.left = coord.x + 'px';\n    element.style.top = coord.y - 24 + 'px'; // adjust based on image height\n  }\n};\n\nAnnotationAnimation.prototype.update = function () {\n  var points = [];\n  var target = new THREE.Vector3();\n  var newVector = new THREE.Vector3();\n\n  return function (delta) {\n    if (this.isPlaying === false) return;\n\n    this.currentTime += delta * this.timeScale;\n\n    this.resetIfLooped();\n\n    // bail out if out of range when playing\n    if (this.isPlayingOutOfRange()) return;\n\n    var _document = this.getDocument();\n    // restore and return if paused before start key\n    if (this.isPaused && this.currentTime < this.startKeyTime) {\n      var element = _document.getElementById(this.id);\n      if (element) element.style.visibility = this.state;\n      return;\n    }\n\n    for (var h = 0, hl = this.hierarchy.length; h < hl; h++) {\n      var object = this.hierarchy[h];\n      var animationCache = object.animationCache[this.data.name];\n\n      // loop through keys\n      for (var t = 0; t < this.keyTypes.length; t++) {\n        var type = this.keyTypes[t];\n        var prevKey = animationCache.prevKey[type];\n        var nextKey = animationCache.nextKey[type];\n\n        if (nextKey.time <= this.currentTime || prevKey.time >= this.currentTime) {\n          prevKey = this.data.hierarchy[h].keys[0];\n          nextKey = this.getNextKeyWith(type, h, 1);\n\n          while (nextKey.time < this.currentTime && nextKey.index > prevKey.index) {\n            prevKey = nextKey;\n            nextKey = this.getNextKeyWith(type, h, nextKey.index + 1);\n          }\n          animationCache.prevKey[type] = prevKey;\n          animationCache.nextKey[type] = nextKey;\n        }\n\n        var prevXYZ = prevKey[type];\n        var nextXYZ = nextKey[type];\n\n        // skip if no key or no change in key values\n        if (nextKey.time === prevKey.time || prevXYZ === undefined || nextXYZ === undefined) continue;\n\n        var scale = (this.currentTime - prevKey.time) / (nextKey.time - prevKey.time);\n        if (scale < 0) scale = 0;\n        if (scale > 1) scale = 1;\n\n        // interpolate\n        if (type === \"pos\") {\n          if (this.interpolationType === INTERPOLATION_TYPE.LINEAR) {\n            newVector.x = prevXYZ[0] + (nextXYZ[0] - prevXYZ[0]) * scale;\n            newVector.y = prevXYZ[1] + (nextXYZ[1] - prevXYZ[1]) * scale;\n            newVector.z = prevXYZ[2] + (nextXYZ[2] - prevXYZ[2]) * scale;\n            object.position.copy(newVector);\n          } else if (this.interpolationType === INTERPOLATION_TYPE.CATMULLROM ||\n          this.interpolationType === INTERPOLATION_TYPE.CATMULLROM_FORWARD) {\n            points[0] = this.getPrevKeyWith(\"pos\", h, prevKey.index - 1)[\"pos\"];\n            points[1] = prevXYZ;\n            points[2] = nextXYZ;\n            points[3] = this.getNextKeyWith(\"pos\", h, nextKey.index + 1)[\"pos\"];\n\n            scale = scale * 0.33 + 0.33;\n\n            var currentPoint = interpolateCatmullRom(points, scale);\n            newVector.x = currentPoint[0];\n            newVector.y = currentPoint[1];\n            newVector.z = currentPoint[2];\n            object.position.copy(newVector);\n\n            if (this.interpolationType === INTERPOLATION_TYPE.CATMULLROM_FORWARD) {\n              var forwardPoint = interpolateCatmullRom(points, scale * 1.01);\n\n              target.set(forwardPoint[0], forwardPoint[1], forwardPoint[2]);\n              target.sub(vector);\n              target.y = 0;\n              target.normalize();\n\n              var angle = Math.atan2(target.x, target.z);\n              object.rotation.set(0, angle, 0);\n            }\n          }\n\n        } else if (type === \"text\") {\n          var text = Math.abs(this.currentTime - nextKey.time) < this.epsilon ? nextXYZ : prevXYZ;\n          this.updateText(object.position, text);\n        } else if (type === \"vis\") {\n          var element = _document.getElementById(this.id);\n          if (element) {\n            var visible = Math.abs(this.currentTime - nextKey.time) < this.epsilon ? nextXYZ : prevXYZ;\n            element.style.visibility = visible ? 'visible' : 'hidden';\n          }\n        }\n      }\n      object.matrixAutoUpdate = true;\n      object.matrixWorldNeedsUpdate = true;\n    }\n  };\n}();","import * as THREE from \"three\";\nimport { INTERPOLATION_TYPE } from '../InterpolationType';\nimport { Animation, interpolateCatmullRom } from '../Animation';\n\nexport function CameraAnimation(root, data, animator) {\n  Animation.call(this, root, data, animator);\n  this.followCam = true;\n};\n\nCameraAnimation.prototype = Object.create(Animation.prototype);\nCameraAnimation.prototype.constructor = CameraAnimation;\nCameraAnimation.prototype.keyTypes = [\"pos\", \"up\", \"target\", \"fov\", \"perspective\"];\nCameraAnimation.prototype.defaultKey = { pos: 0, up: 0, target: 0, fov: 0, perspective: 0 };\n\nCameraAnimation.prototype.setFollowCamera = function (followCam) {\n  this.followCam = followCam;\n};\n\nCameraAnimation.prototype.update = function () {\n  var points = [];\n\n  var target = new THREE.Vector3();\n  var newVector = new THREE.Vector3();\n\n  return function (delta) {\n    if (this.isPlaying === false) return;\n\n    this.currentTime += delta * this.timeScale;\n\n    this.resetIfLooped();\n\n    // Abort if the camera is not meant to be updated.\n    if (!this.followCam)\n    return;\n\n    // bail out if out of range when playing\n    if (this.isPlayingOutOfRange()) return;\n\n    for (var h = 0, hl = this.hierarchy.length; h < hl; h++) {\n      var object = this.hierarchy[h];\n      var animationCache = object.animationCache[this.data.name];\n\n      // loop through keys\n      for (var t = 0; t < this.keyTypes.length; t++) {\n        var type = this.keyTypes[t];\n        var prevKey = animationCache.prevKey[type];\n        var nextKey = animationCache.nextKey[type];\n\n        if (nextKey.time <= this.currentTime || prevKey.time >= this.currentTime) {\n          prevKey = this.data.hierarchy[h].keys[0];\n          nextKey = this.getNextKeyWith(type, h, 1);\n\n          while (nextKey.time < this.currentTime && nextKey.index > prevKey.index) {\n            prevKey = nextKey;\n            nextKey = this.getNextKeyWith(type, h, nextKey.index + 1);\n          }\n          animationCache.prevKey[type] = prevKey;\n          animationCache.nextKey[type] = nextKey;\n        }\n\n        var prevXYZ = prevKey[type];\n        var nextXYZ = nextKey[type];\n\n        // skip if no key or no change in key values\n        if (nextKey.time === prevKey.time || prevXYZ === undefined || nextXYZ === undefined) continue;\n\n        var scale = (this.currentTime - prevKey.time) / (nextKey.time - prevKey.time);\n        if (scale < 0) scale = 0;\n        if (scale > 1) scale = 1;\n\n        // interpolate\n        var vector;\n        if (type === \"pos\") {\n          vector = object.position;\n        } else if (type === \"up\") {\n          vector = object.up;\n        } else if (type === \"target\") {\n          vector = object.target;\n        } else if (type === \"fov\") {\n          object.setFov(prevXYZ + (nextXYZ - prevXYZ) * scale);\n          continue;\n        } else if (type === \"perspective\") {\n          var mode = scale > 0.5 ? nextXYZ : prevXYZ;\n          if (mode)\n          object.toPerspective();else\n\n          object.toOrthographic();\n          continue;\n        }\n\n        if (this.interpolationType === INTERPOLATION_TYPE.LINEAR) {\n          newVector.x = prevXYZ[0] + (nextXYZ[0] - prevXYZ[0]) * scale;\n          newVector.y = prevXYZ[1] + (nextXYZ[1] - prevXYZ[1]) * scale;\n          newVector.z = prevXYZ[2] + (nextXYZ[2] - prevXYZ[2]) * scale;\n          vector.copy(newVector);\n        } else /*if (this.interpolationType === INTERPOLATION_TYPE.CATMULLROM ||\n               this.interpolationType === INTERPOLATION_TYPE.CATMULLROM_FORWARD)*/{\n            points[0] = this.getPrevKeyWith(type, h, prevKey.index - 1)[type];\n            points[1] = prevXYZ;\n            points[2] = nextXYZ;\n            points[3] = this.getNextKeyWith(type, h, nextKey.index + 1)[type];\n\n            scale = scale * 0.33 + 0.33;\n\n            var currentPoint = interpolateCatmullRom(points, scale);\n            newVector.x = currentPoint[0];\n            newVector.y = currentPoint[1];\n            newVector.z = currentPoint[2];\n            vector.copy(newVector);\n\n            if (this.interpolationType === INTERPOLATION_TYPE.CATMULLROM_FORWARD) {\n              var forwardPoint = interpolateCatmullRom(points, scale * 1.01);\n\n              target.set(forwardPoint[0], forwardPoint[1], forwardPoint[2]);\n              target.sub(vector);\n              target.y = 0;\n              target.normalize();\n\n              var angle = Math.atan2(target.x, target.z);\n              object.rotation.set(0, angle, 0);\n            }\n          }\n      }\n      object.matrixAutoUpdate = true;\n      object.matrixWorldNeedsUpdate = true;\n    }\n    object.lookAt(object.target);\n    this.animator.updateFlag |= this.animator.UPDATE_CAMERA;\n  };\n}();","import * as THREE from \"three\";\nimport { INTERPOLATION_TYPE } from '../InterpolationType';\nimport { Animation, interpolateCatmullRom } from '../Animation';\n\n\nexport function MeshAnimation(root, data, animator) {\n  Animation.call(this, root, data, animator);\n  //this.originalMatrix = root.matrix.clone();\n  this.localMatrix = new THREE.Matrix4();\n\n  this.root.getAnimTransform();\n  this.relativeTransform = data.custom && data.custom.transform && data.custom.transform === \"abs\" ? false : true;\n\n  /*\n                                                                                                                   if (this.relativeTransform) {\n                                                                                                                       //this.root.updateMatrixWorld();\n                                                                                                                   } else {\n                                                                                                                       \n                                                                                                                   }\n                                                                                                                   */\n};\n\nMeshAnimation.prototype = Object.create(Animation.prototype);\nMeshAnimation.prototype.constructor = MeshAnimation;\nMeshAnimation.prototype.keyTypes = [\"pos\", \"rot\", \"scl\"];\nMeshAnimation.prototype.defaultKey = { pos: 0, rot: 0, scl: 0 };\n\nMeshAnimation.prototype.update = function () {\n  var points = [];\n\n  var target = new THREE.Vector3();\n  var newVector = new THREE.Vector3();\n  var newQuat = new THREE.Quaternion();\n  var tmpMatrix1 = new THREE.Matrix4();\n  var tmpMatrix2 = new THREE.Matrix4();\n\n  return function (delta) {\n    if (this.isPlaying === false) return;\n\n    this.currentTime += delta * this.timeScale;\n\n    this.resetIfLooped();\n\n    // bail out if out of range when playing\n    if (this.isPlayingOutOfRange()) return;\n\n    for (var h = 0, hl = this.hierarchy.length; h < hl; h++) {\n      var object = this.hierarchy[h];\n      var animationCache = object.animationCache[this.data.name];\n\n      // loop through keys\n      for (var t = 0; t < this.keyTypes.length; t++) {\n        var type = this.keyTypes[t];\n        var prevKey = animationCache.prevKey[type];\n        var nextKey = animationCache.nextKey[type];\n\n        if (nextKey.time <= this.currentTime || prevKey.time >= this.currentTime) {\n          prevKey = this.data.hierarchy[h].keys[0];\n          nextKey = this.getNextKeyWith(type, h, 1);\n\n          while (nextKey.time < this.currentTime && nextKey.index > prevKey.index) {\n            prevKey = nextKey;\n            nextKey = this.getNextKeyWith(type, h, nextKey.index + 1);\n          }\n          animationCache.prevKey[type] = prevKey;\n          animationCache.nextKey[type] = nextKey;\n        }\n\n        var prevXYZ = prevKey[type];\n        var nextXYZ = nextKey[type];\n\n        // skip if no key or no change in key values\n        if (nextKey.time === prevKey.time || prevXYZ === undefined || nextXYZ === undefined) continue;\n\n        var scale = (this.currentTime - prevKey.time) / (nextKey.time - prevKey.time);\n        if (scale < 0) scale = 0;\n        if (scale > 1) scale = 1;\n\n        // interpolate\n        if (type === \"pos\") {\n          if (this.interpolationType === INTERPOLATION_TYPE.LINEAR) {\n            newVector.x = prevXYZ[0] + (nextXYZ[0] - prevXYZ[0]) * scale;\n            newVector.y = prevXYZ[1] + (nextXYZ[1] - prevXYZ[1]) * scale;\n            newVector.z = prevXYZ[2] + (nextXYZ[2] - prevXYZ[2]) * scale;\n            object.position.copy(newVector);\n          } else /*if (this.interpolationType === INTERPOLATION_TYPE.CATMULLROM ||\n                 this.interpolationType === INTERPOLATION_TYPE.CATMULLROM_FORWARD)*/{\n              points[0] = this.getPrevKeyWith(\"pos\", h, prevKey.index - 1)[\"pos\"];\n              points[1] = prevXYZ;\n              points[2] = nextXYZ;\n              points[3] = this.getNextKeyWith(\"pos\", h, nextKey.index + 1)[\"pos\"];\n\n              scale = scale * 0.33 + 0.33;\n\n              var currentPoint = interpolateCatmullRom(points, scale);\n              newVector.x = currentPoint[0];\n              newVector.y = currentPoint[1];\n              newVector.z = currentPoint[2];\n              object.position.copy(newVector);\n\n              if (this.interpolationType === INTERPOLATION_TYPE.CATMULLROM_FORWARD) {\n                var forwardPoint = interpolateCatmullRom(points, scale * 1.01);\n\n                target.set(forwardPoint[0], forwardPoint[1], forwardPoint[2]);\n                target.sub(vector);\n                target.y = 0;\n                target.normalize();\n\n                var angle = Math.atan2(target.x, target.z);\n                object.rotation.set(0, angle, 0);\n              }\n            }\n        } else if (type === \"rot\") {\n          THREE.Quaternion.slerp(prevXYZ, nextXYZ, newQuat, scale);\n          object.quaternion.copy(newQuat);\n        } else if (type === \"scl\") {\n          newVector.x = prevXYZ[0] + (nextXYZ[0] - prevXYZ[0]) * scale;\n          newVector.y = prevXYZ[1] + (nextXYZ[1] - prevXYZ[1]) * scale;\n          newVector.z = prevXYZ[2] + (nextXYZ[2] - prevXYZ[2]) * scale;\n          object.scale.copy(newVector);\n        }\n      }\n\n      // Note that object is expected to be a FragmentPointer here, not THREE.Object3D.\n\n      if (!this.relativeTransform) {\n        // Animation matrices in FragmentList are always applied after the world matrix.\n        // If we right-multiply the worldMatrix inverse, we revert the original world matrix.\n\n        // get anim matrix\n        var animMatrix = tmpMatrix1.compose(object.position, object.quaternion, object.scale);\n\n        // get inverse of world matrix\n        var worldInv = tmpMatrix2;\n        object.getOriginalWorldMatrix(worldInv);\n        worldInv.getInverse(worldInv);\n\n        // compute final anim matrix in a way that we first revert the world matrix,\n        // then apply the absolute anim matrix\n        var finalAnimMatrix = tmpMatrix1.multiplyMatrices(animMatrix, worldInv);\n\n        // write back to the object\n        finalAnimMatrix.decompose(object.position, object.quaternion, object.scale);\n      }\n\n      // compose local transform and multiply to original transform\n      object.updateAnimTransform();\n\n      // update world matrix so scene bounds can be set correctly\n      //object.updateMatrixWorld();\n    }\n  };\n}();","import * as THREE from \"three\";\nimport { Animation } from '../Animation';\n\nexport function PolylineAnimation(root, data, animator) {\n  this.viewer = animator.viewer;\n  if (root === null) {\n    root = this.createPolyline([]);\n  }\n  Animation.call(this, root, data, animator);\n  this.epsilon = 0.1;\n};\n\nPolylineAnimation.prototype = Object.create(Animation.prototype);\nPolylineAnimation.prototype.constructor = PolylineAnimation;\nPolylineAnimation.prototype.keyTypes = [\"points\", \"vis\"];\nPolylineAnimation.prototype.defaultKey = { points: [], vis: 1 };\n\nPolylineAnimation.prototype.stop = function () {\n  Animation.prototype.stop.call(this);\n  this.viewer.removeOverlay(\"polyline\", this.root);\n  this.root = null;\n};\n\nPolylineAnimation.prototype.update = function () {\n  function removePolyline(anim) {\n    if (anim.root) {\n      anim.viewer.removeOverlay(\"polyline\", anim.root);\n      anim.root = null;\n    }\n  }\n\n  return function (delta) {\n    if (this.isPlaying === false) return;\n\n    this.currentTime += delta * this.timeScale;\n\n    this.resetIfLooped();\n\n    // bail out if out of range when playing\n    if (this.isPlayingOutOfRange()) return;\n\n    // restore and return if paused before start key\n    if (this.isPaused && this.currentTime < this.startKeyTime) {\n      removePolyline(this);\n      return;\n    }\n\n    for (var h = 0, hl = this.hierarchy.length; h < hl; h++) {\n      var object = this.hierarchy[h];\n      var animationCache = object.animationCache[this.data.name];\n\n      // loop thru keys\n      for (var t = 0; t < this.keyTypes.length; t++) {\n        var type = this.keyTypes[t];\n        var prevKey = animationCache.prevKey[type];\n        var nextKey = animationCache.nextKey[type];\n\n        if (nextKey.time <= this.currentTime || prevKey.time >= this.currentTime) {\n          prevKey = this.data.hierarchy[h].keys[0];\n          nextKey = this.getNextKeyWith(type, h, 1);\n\n          while (nextKey.time < this.currentTime && nextKey.index > prevKey.index) {\n            prevKey = nextKey;\n            nextKey = this.getNextKeyWith(type, h, nextKey.index + 1);\n          }\n          animationCache.prevKey[type] = prevKey;\n          animationCache.nextKey[type] = nextKey;\n        }\n\n        var prevPoints = prevKey[type];\n        var nextPoints = nextKey[type];\n\n        // skip if no key or no change in key values\n        if (nextKey.time === prevKey.time || prevPoints === undefined || nextPoints === undefined) continue;\n\n        var scale = (this.currentTime - prevKey.time) / (nextKey.time - prevKey.time);\n        if (scale < 0) scale = 0;\n        if (scale > 1) scale = 1;\n\n        if (type === \"points\") {\n          // interpolate start and end points\n          var points = scale < 0.5 ? prevPoints : nextPoints;\n          this.viewer.removeOverlay(\"polyline\", this.root);\n          this.root = null;\n          var vertices = [];\n          for (var i = 0; i < points.length; i++) {\n            var pt = points[i].slice();\n            if (i === 0) {\n              pt[0] = prevPoints[i][0] + (nextPoints[i][0] - prevPoints[i][0]) * scale;\n              pt[1] = prevPoints[i][1] + (nextPoints[i][1] - prevPoints[i][1]) * scale;\n              pt[2] = prevPoints[i][2] + (nextPoints[i][2] - prevPoints[i][2]) * scale;\n            } else\n            if (i === points.length - 1) {\n              var p = prevPoints.length - 1;\n              var n = nextPoints.length - 1;\n              pt[0] = prevPoints[p][0] + (nextPoints[n][0] - prevPoints[p][0]) * scale;\n              pt[1] = prevPoints[p][1] + (nextPoints[n][1] - prevPoints[p][1]) * scale;\n              pt[2] = prevPoints[p][2] + (nextPoints[n][2] - prevPoints[p][2]) * scale;\n            }\n            var newpt = new THREE.Vector3(pt[0], pt[1], pt[2]);\n            vertices.push(newpt);\n          }\n          this.root = this.createPolyline(vertices);\n        } else if (type === \"vis\") {\n          var vis = Math.abs(this.currentTime - nextKey.time) < this.epsilon ? nextPoints : prevPoints;\n          this.root.visible = vis;\n          if (!vis) removePolyline(this);\n        }\n      }\n    }\n  };\n}();\n\nPolylineAnimation.prototype.createPolyline = function (points) {\n  var geometry = new THREE.Geometry();\n  for (var i = 0; i < points.length; i++) {\n    geometry.vertices.push(points[i]);\n  }\n  geometry.computeLineDistances();\n\n  var material = new THREE.LineDashedMaterial({ color: 0x0, dashSize: 1, gapSize: 0.5, linewidth: 1 });\n  var line = new THREE.Line(geometry, material, THREE.LineStrip);\n\n  // add polyline to an overlay scene\n  if (this.viewer.overlayScenes[\"polyline\"] === undefined) {\n    this.viewer.createOverlayScene(\"polyline\");\n  }\n  this.viewer.addOverlay(\"polyline\", line);\n\n  return line;\n};","import { Animation } from '../Animation';\n\nexport function VisibilityAnimation(data, nodeId, animator) {var _this = this;\n  Animation.call(this, {}, data, animator);\n\n  this.fragPointers = [];\n  var fragPointer, material;\n  // Cache these so we don't iterate each frame\n  this.nodeChildren = [];\n  this.nodeFragments = [];\n\n  var instanceTree = this.viewer.model.getData().instanceTree;\n  instanceTree.enumNodeChildren(nodeId, function (dbId) {\n    _this.nodeChildren.push(dbId);\n  }, true);\n  instanceTree.enumNodeFragments(data.id, function (fragId) {\n    _this.nodeFragments.push(fragId);\n    fragPointer = _this.viewer.getFragmentProxy(_this.viewer.model, fragId);\n    if (fragPointer) {\n      _this.fragPointers.push(fragPointer);\n      //Need to clone the material as it can be shared between many objects\n      //and we need to modify it for this object specifically\n      fragPointer.setMaterial(_this.viewer.matman().cloneMaterial(fragPointer.getMaterial(), _this.viewer.model));\n    }\n  }, true);\n\n\n  this.nodeId = nodeId;\n  this.epsilon = 0.1;\n}\n\nVisibilityAnimation.prototype = Object.create(Animation.prototype);\nVisibilityAnimation.prototype.constructor = VisibilityAnimation;\nVisibilityAnimation.prototype.keyTypes = [\"vis\", \"opa\"];\nVisibilityAnimation.prototype.defaultKey = { viz: 1, opa: 1 };\n\nVisibilityAnimation.prototype.getPrevAndNextKeys = function (objHeirarcy, keyType) {\n  var prevKey = this.data.hierarchy[objHeirarcy].keys[0];\n  var nextKey = this.getNextKeyWith(keyType, objHeirarcy, 1);\n\n  while (nextKey.time < this.currentTime && nextKey.index > prevKey.index) {\n    prevKey = nextKey;\n    nextKey = this.getNextKeyWith(keyType, objHeirarcy, nextKey.index + 1);\n  }\n\n  return {\n    prevKey: prevKey,\n    nextKey: nextKey };\n\n};\n\nVisibilityAnimation.prototype.update = function () {\n  return function (delta) {\n    if (this.isPlaying === false) return;\n\n    this.currentTime += delta * this.timeScale;\n\n    this.resetIfLooped();\n\n    // bail out if out of range when playing\n    if (this.isPlayingOutOfRange()) return;\n\n    for (var h = 0, hl = this.hierarchy.length; h < hl; h++) {\n      var object = this.hierarchy[h];\n      var animationCache = object.animationCache[this.data.name];\n\n      var prevVisKey = animationCache.prevKey['vis'];\n      var nextVisKey = animationCache.prevKey['vis'];\n\n      var prevOpaKey = animationCache.prevKey['opa'];\n      var nextOpaKey = animationCache.prevKey['opa'];\n\n      if (nextVisKey.time <= this.currentTime || prevVisKey.time >= this.currentTime) {var _this$getPrevAndNextK =\n        this.getPrevAndNextKeys(h, 'vis'),prevKey = _this$getPrevAndNextK.prevKey,nextKey = _this$getPrevAndNextK.nextKey;\n        prevVisKey = prevKey;\n        nextVisKey = nextKey;\n        animationCache.prevKey['vis'] = prevVisKey;\n        animationCache.nextKey['vis'] = nextVisKey;\n      }\n\n      if (nextOpaKey.time <= this.currentTime || prevOpaKey.time >= this.currentTime) {var _this$getPrevAndNextK2 =\n        this.getPrevAndNextKeys(h, 'opa'),_prevKey = _this$getPrevAndNextK2.prevKey,_nextKey = _this$getPrevAndNextK2.nextKey;\n        prevOpaKey = _prevKey;\n        nextOpaKey = _nextKey;\n        animationCache.prevKey['opa'] = prevOpaKey;\n        animationCache.nextKey['opa'] = nextOpaKey;\n      }\n\n      // Visibility\n\n      var prevValue = prevVisKey['vis'];\n      var nextValue = nextVisKey['vis'];\n\n      if (prevValue !== undefined && nextValue !== undefined && prevVisKey.time !== nextVisKey.time) {\n        var isNextKey = Math.abs(this.currentTime - nextVisKey.time) < this.epsilon;\n        var vis = isNextKey ? nextValue : prevValue;\n        this.viewer.visibilityManager.setNodeOff(this.nodeId, !vis, this.viewer.model, this.nodeChildren, this.nodeFragments);\n      }\n\n      // Opacity\n\n      prevValue = prevOpaKey['opa'];\n      nextValue = nextOpaKey['opa'];\n\n      // Handle undefined opacity\n      // Initially opacity is default value of 1, but when scrubbing, the value might have changed\n      if (prevValue === undefined && prevVisKey['vis'] === 1) {\n        // Restore opacity to default value only if the object was visible initially\n        prevValue = 1;\n      }\n\n      if (prevValue !== undefined && nextValue !== undefined && prevOpaKey.time !== nextOpaKey.time) {\n        var scale = (this.currentTime - prevOpaKey.time) / (nextOpaKey.time - prevOpaKey.time);\n        if (scale < 0) scale = 0;\n        if (scale > 1) scale = 1;\n        var opacity = prevValue + (nextValue - prevValue) * scale;\n\n        for (var fp = 0; fp < this.fragPointers.length; ++fp) {\n          var material = this.fragPointers[fp].getMaterial();\n          material.transparent = opacity !== 1;\n          material.opacity = opacity;\n        }\n\n        if (opacity > 0) {\n          this.viewer.visibilityManager.setNodeOff(this.nodeId, false, this.viewer.model, this.nodeChildren, this.nodeFragments);\n        }\n      }\n    }\n  };\n}();","function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {try {var info = gen[key](arg);var value = info.value;} catch (error) {reject(error);return;}if (info.done) {resolve(value);} else {Promise.resolve(value).then(_next, _throw);}}function _asyncToGenerator(fn) {return function () {var self = this,args = arguments;return new Promise(function (resolve, reject) {var gen = fn.apply(self, args);function _next(value) {asyncGeneratorStep(gen, resolve, reject, _next, _throw, \"next\", value);}function _throw(err) {asyncGeneratorStep(gen, resolve, reject, _next, _throw, \"throw\", err);}_next(undefined);});};}function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}import { getParameterByName } from \"../globals\";\nimport { isMobileDevice } from \"../compat\";\nimport { DynamicGlobalOffset } from \"./DynamicGlobalOffset\";\n\nvar av = Autodesk.Viewing;\nvar avp = av.Private;\n\n// Enum for all extension names we are using here\nvar ExtNames = {\n  BimWalk: 'Autodesk.BimWalk',\n  Bookmarks: 'Autodesk.AEC.CanvasBookmarkExtension',\n  Levels: 'Autodesk.AEC.LevelsExtension',\n  CrossFade: 'Autodesk.CrossFadeEffects',\n  Hyperlinks: 'Autodesk.AEC.HyperlinkExtension',\n  Minimap: 'Autodesk.AEC.Minimap3DExtension',\n  DropMe: 'Autodesk.AEC.DropMeExtension',\n  ZoomWindow: 'Autodesk.Viewing.ZoomWindow',\n  FusionOrbit: 'Autodesk.Viewing.FusionOrbit',\n  DiffTool: 'Autodesk.DiffTool',\n  ModelStructure: 'Autodesk.ModelStructure' };\n\n\n// Alignment Services:\n// The client can choose the backend that is used to load/save alignment transforms.\n//\n// Example 1: Use a Default Service\n//  options.createModelAlignmentService = av.AggregatedView.AlignmentServices.LocalStorage;\n// \n// Example 2: Implement your own\n//  options.createModelAlignmentService = () => new MyOwnAlignmentService();\n//\n// where cfg is options.modelAlignmentConfig in your AggregatedView options.\n//\n// Note: You can assume the ModelAlignmentExtension code to be available when the callback\n//       is executed, but not earlier. \nvar AlignmentServices = {\n  LocalStorage: function LocalStorage() {return new Autodesk.ModelAlignmentService.AlignmentServiceLS();} };\n\n\n// Get model key. Input may be bubbleNode, Model, or model key already.\nvar makeKey = function makeKey(value) {\n\n  if (value instanceof av.BubbleNode) {\n    return value.getModelKey();\n  }\n\n  // For LMV models, get bubbleNode first\n  if (value instanceof av.Model) {var _value$getDocumentNod;\n    return (_value$getDocumentNod = value.getDocumentNode()) === null || _value$getDocumentNod === void 0 ? void 0 : _value$getDocumentNod.getModelKey();\n  }\n\n  if (typeof value === 'string') {\n    return value;\n  }\n  console.error(\"makeKey: Input must be key, model, or BubbleNode\");\n};\n\nvar createModelItem = function createModelItem(node) {\n  return {\n    // av.Model or null (if the model root is loading)\n    model: null, // av.Model\n\n    // Same as model.getDocumentNode(), but model may be null if the root is not loaded yet.\n    node: node, // av.BubbleNode\n\n    // A model is \"set to be visible\" if either\n    //  a) model is already displayed\n    //  b) model will be displayed as soon as model root is loaded\n    visible: false,\n\n    // Url used for the loadModel - needed for cancelling loads if model root is not available yet\n    url: null,\n\n    // Indicates that the model root of this model is currently loading\n    loading: false,\n\n    // Indicates that we already tried loading this model, but failed\n    error: false };\n\n};\n\n// Empty 3D views may be confusing and easily mistaken for a bug.\n// Therefore, we notify the user if the shown model is empty.\nvar warnIfModelEmpty = function warnIfModelEmpty(model) {\n  var data = model.getData();\n  var bubbleNode = data.loadOptions.bubbleNode;\n  var modelEmpty = model.is3d() && data.metadata.stats && !data.metadata.stats.num_fragments;\n  if (modelEmpty) {\n    var viewName = bubbleNode.name();\n    var modelName = bubbleNode.getRootNode().children[0].name();\n    console.warn(\"Empty View \\\"\".concat(viewName, \"\\\" in model \\\"\").concat(modelName, \"\\\".\"));\n  }\n};\n\nvar isVectorFinite = function isVectorFinite(vec) {\n  return isFinite(vec.x) && isFinite(vec.y) && isFinite(vec.z);\n};\n\nvar isBoxFinite = function isBoxFinite(box) {\n  return isVectorFinite(box.min) && isVectorFinite(box.max);\n};\n\nvar getUpVector = function getUpVector(model) {\n  var upVectorArray = model.getUpVector();\n  return upVectorArray && new THREE.Vector3().fromArray(upVectorArray);\n};\n\nvar isCameraValid = function isCameraValid(camera) {\n  return (\n    isVectorFinite(camera.position) &&\n    isVectorFinite(camera.target) &&\n    isVectorFinite(camera.up) &&\n    isFinite(camera.orthoScale));\n\n};\n\n// Helper function for home camera:\n// Check how many models are intersecting the frustum when using a certain camera.\nvar countCatchedModels = function countCatchedModels(models, camPos, frustum) {\n\n  var catchedModels = 0;\n  for (var i = 0; i < models.length; i++) {\n\n    // model outside frustum? => consider as missed\n    var model = models[i];\n    var bbox = model.getBoundingBox();\n    if (frustum.intersectsBox(bbox) === Autodesk.Viewing.Private.FrustumIntersector.OUTSIDE) {\n      continue;\n    }\n\n    // also consider models as missed if they are extremely far away from the camera\n    var diag = bbox.size().length;\n    var dist = bbox.distanceToPoint(camPos);\n    if (dist > diag * 50) {\n      continue;\n    }\n\n    catchedModels++;\n  }\n\n  return catchedModels;\n};\n\n\n// As home camera for aggregated views, we use the default camera of one of the visible models.\n// The choice is done in a way that we have as many visible models in frustum as possible.\nvar updateHomeCamera = function updateHomeCamera(viewer) {\n\n  // Filter out any crappy models in advance (empty or infinite bbox)\n  var models = viewer.getVisibleModels();\n  models = models.filter(function (model) {return isBoxFinite(model.getBoundingBox());});\n\n  var tmpCam = viewer.impl.camera.clone();\n  var frustum = new Autodesk.Viewing.Private.FrustumIntersector();\n\n  // Get model from the first model that defines it (must match anyway).\n  // For the camera, we choose the default cam of the largest model (wrt. to data size).\n  var upVector = undefined;\n  var camera = undefined;\n  var bestScore = undefined;\n  for (var i = 0; i < models.length; i++) {\n    var model = models[i];\n\n    // Choose the first up-vector we get\n    // We assume identical ones - otherwise, the aggregated model would be weird anyway.\n    if (!upVector) {\n      upVector = getUpVector(model);\n    }\n\n    // Consider default cam if valid\n    var modelCam = model.getDefaultCamera();\n    if (!modelCam || !isCameraValid(modelCam)) {\n      continue;\n    }\n\n    var modelBox = model.getBoundingBox();\n\n    // Configure frustum test for this camera\n    tmpCam.position.copy(modelCam.position);\n    tmpCam.target.copy(modelCam.target);\n    tmpCam.up.copy(modelCam.up);\n    tmpCam.isPerspective = modelCam.isPerspective;\n    tmpCam.near = modelBox.distanceToPoint(tmpCam.position);\n    tmpCam.far = tmpCam.near + modelBox.size().length;\n    tmpCam.updateMatrixWorld();\n    tmpCam.updateProjectionMatrix();\n    tmpCam.matrixWorldInverse.getInverse(tmpCam.matrixWorld);\n    frustum.reset(tmpCam);\n\n    // Choose camera that catched most models\n    var score = countCatchedModels(models, modelCam.position, frustum);\n    if (!camera || score >= bestScore) {\n      camera = modelCam;\n      bestScore = score;\n    }\n  }\n\n  if (!camera) {\n    return;\n  }\n\n  // Extend camera by...\n  //  1. pivot: Otherwise, autocam may leave the pivot point at some far-away position\n  //     and the camera will orbit into void on next move.\n  //  2. worldup: To make sure that we are not using the wrong axis for orbiting\n  //  3. fov: always use reasonable default\n  camera.pivot = camera.target;\n  camera.worldup = upVector;\n  camera.fov = 45.0;\n\n  viewer.autocam.setHomeViewFrom(camera);\n};\n\n// Helper class to manage modelTheming state for a single model\nvar ModelThemingState = /*#__PURE__*/function () {\n\n  function ModelThemingState(color) {_classCallCheck(this, ModelThemingState);\n    // Currently assigned theming color\n    this.color = color; // Vector4 \n\n    // Used to avoid conflicts with DiffTool: If false, we don't touch theming colors until enabled again.\n    this.enabled = true;\n\n    // indiciates if the theming colors of the\n    // model are currently applied\n    this.active = false;\n  }_createClass(ModelThemingState, [{ key: \"setEnabled\", value: function setEnabled(\n\n    model, enable) {\n      if (enable === this.enabled) {\n        return;\n      }\n      this.enabled = enable;\n\n      // revert theme colors if needed\n      if (this.active && !enable) {\n        model.clearThemingColors();\n        this.active = false;\n      } else {\n        this.update(model);\n      }\n    } }, { key: \"update\", value: function update(\n\n    model) {\n      // Don't change theming if already applied or disabled\n      if (this.active || !this.enabled) {\n        return;\n      }\n\n      // set color for all dbIds that are associated with shapes. Note that some dbIds may appear more\n      // than once, but this is not a problem here.\n      var dbIds = model.myData.fragments.fragId2dbId;\n      for (var i = 0; i < dbIds.length; i++) {\n        var dbId = dbIds[i];\n        model.setThemingColor(dbId, this.color);\n      }\n\n      this.active = true;\n    } }]);return ModelThemingState;}();\n\n\nexport var AggregatedView = /*#__PURE__*/function () {\n\n  function AggregatedView() {_classCallCheck(this, AggregatedView);\n\n    // The purpose of the global offset is to avoid float inaccuracies for georeferenced\n    // models with large offset. Note that we only use (0,0,0) as long as we don't\n    // know anything better (see resetRefPoint())\n    //\n    // By default, LMV chooses the center of the model. This is okay for\n    // a single model. But for multiple ones, it would mean to center all models\n    // independently, so that their relative placement would be lost.\n    this.globalOffset = undefined;\n\n    // refPoint is chosen once per view switch and determined from the first model\n    // to be shown. The globalOffset is only reset if too far away from the current refPoint.\n    this.refPoint = undefined;\n\n    // Contains modelItems for all models that are in memory or currently loading.\n    // Indexed by modelKey (string).\n    this.modelItems = {};\n\n    // Indicates whether we have to setup LMV for a new view on next model add,\n    // e.g., creating/updating the LMV toolbar and reset tools. We want to do this only\n    // on startup or after an explicit view switch by the user.\n    this.resetOnNextModelAdd = true;\n\n    // In case resetOnNextModelAdd was triggered by showing a model, we save it here. This helps\n    // avoids concurrency problems where more than one model is loaded at a time, i.e. a 2D sheet is loaded and\n    // immediately a 3D model as well, but the 3D model triggers a reset, and only then the 2D sheet triggers it again\n    // In that case, the UI will be reset according to the 2D, whereas the 3D model was loaded last. This variable\n    // will ensure the last one that updated it will have the last word.\n    this.resetTriggeringBubble = null;\n\n    this.memTracker = null;\n\n    this.cameraInitialized = false;\n\n    // If true, the viewer is configured for 3D viewing, otherwise for 2d.\n    // This flag is determined whenever adding the first model to an empty view.\n    this.is3D = undefined;\n\n    // If a camera is set before the global offset is determined, we keep it here and\n    // apply it as soon as globalOffset is initialized.\n    this.pendingCamera = null;\n\n    // Since extension load is async, viewer.getExtension() may return null although we called loadExtension already.\n    // For extensions that we load/unload dynamically, we track the state here - to avoid loading the same extension twice.\n    this.extensionLoaded = {};\n\n    this.loadersInProgress = {};\n\n    // Current diff-view configuration.\n    this.diff = {\n      enabled: false,\n      diffBubble: undefined,\n      primaryBubble: undefined,\n      diffBubbleLabel: undefined,\n      primaryBubbleLabel: undefined,\n      progressCallback: undefined,\n      refNames: undefined };\n\n\n    // Keys of all models that we keep ghosted during diff mode\n    // (if they are not participating in the diff)\n    this.modelIsGhosted = {};\n\n    // Cache diffs to avoid frequent recomputation\n    this.diffCache = [];\n\n    // Set this to be notified when diff load/computation is finished\n    this.onDiffDone = undefined;\n\n    // Indicates that the first 3D model is loading and we have to wait for it \n    // to finish before we can load another model. This is needed to determine a consistent globalOffset.\n    this.waitForFirstModel = false;\n\n    // Mapping from modelKey to an object with {resolve, reject}, that will fulfill a pending load promise\n    // when waitForFirstModel is done.\n    this.loadPendingPromises = {};\n\n    // Internally used array of callbacks that are triggered when a model is loaded.\n    this.onLoad = [];\n\n    // Internally used array of callbacks that are triggered when a model is unloaded.\n    this.onUnload = [];\n\n    // Optional: Assign theming color based on model (for 3D aggregated views)\n    this.modelThemingStates = {}; // keys: modelId, values: ModelThemingState\n\n    // Simplify debugging.\n    // Note: This value is ONLY for debugging purposes and not supposed to be used in production code.\n    window.LMV_MAIN_VIEW = this;\n\n    // Only used if fetchAlignment is called before AlignmentService is ready\n    this.pendingAlignmentFetches = []; // Promise[]\n  }\n\n  // @param {Object} [options]                      - Configuration options for aggregated view\n  // @param {Object} [options.viewerConfig]         - Used for initializing GuiViewer3D\n  // @param {bool}   [options.disableBookmarks]     - Disable display of visual bookmarks (\n  // @param {Object} [options.clusterfck]           - Dependency-Injection of clusterfck library (enables clustering of Bookmark icons)\n  // @param {function(av.BubbleNode)=>object} [options.getCustomLoadOptions]   - Allows for applying custom options to be used for all model loading.\n  //                                                                             The callback returns an options object that is applied by default in all model-load calls.\n  // @param {object} [options.viewerStartOptions] - Options passed to the viewer initialization process.\n  // @param {Autodesk.Viewing.MultiViewerFactory} [options.multiViewerFactory] - Optional multi viewer factory. Used to create multiple viewers with shared resources.\n  // @param {bool} [options.ignoreGlobalOffset]     - Forces globalOffset to undefined for all loaded models.\n  //                                                  Effect of this is that all models are auto-centered using the model bbox.\n  //                                                  Note that this does only work if you never show more than one 3D viewable at once.\n  // @param {bool} [options.unloadUnfinishedModels] - By setting unloadUnfinishedModels, when calling hide(bubbleNode), it will unload models that haven't been fully loaded.\n  //                                                  Used in order to reduce amount of file loaders when switching between models.\n  // @param {bool} [options.useDynamicGlobalOffset] - If true, the globalOffset is applied dynamically after loading.\n  // @param {function} options.createModelAlignmentService - Factory function to create AlignmentService implementation for loading/saving model transforms.\n  //                                                         See AlignmentServices above for details.\n  // @returns {Promise}                             - When resolved all required extensions are loaded.\n  _createClass(AggregatedView, [{ key: \"init\", value: function init(parentDiv) {var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n      this.initViewerInstance(parentDiv, options);\n\n      this.memTracker = new av.ModelMemoryTracker(this.viewer, options.memoryLimit);\n\n      // Activate transparency improvement by default\n      this.viewer.impl.showTransparencyWhenMoving();\n\n      // Activate dynamic globalOffset if wanted\n      if (options.useDynamicGlobalOffset) {\n        this.dynamicGlobalOffset = new DynamicGlobalOffset(this.viewer);\n      }\n\n      this.options = options;\n\n      this._registerLmvEventListeners();\n      return this._loadExtensions();\n    }\n\n    // Initialize a new viewer instance.\n  }, { key: \"initViewerInstance\", value: function initViewerInstance(parentDiv) {var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n      var ViewerClass = options.viewerClass || (options.headlessViewer ? av.Viewer3D : av.GuiViewer3D);\n\n      // Disable auto-load of default hyperlink extension. Reasons:\n      //  a) It produces asserts for background loading, because it assumes 'viewer.model' to exist\n      //  b) Design Collaboration are using AEC hyperlink extension instead, and Docs are using\n      //  another custom extension\n      var config = options.viewerConfig || {};\n      config.disabledExtensions = config.disabledExtensions || {};\n      config.disabledExtensions.hyperlink = true;\n\n      if (options.multiViewerFactory) {\n        this.viewer = options.multiViewerFactory.createViewer(parentDiv, options.viewerConfig, ViewerClass);\n      } else {\n        this.viewer = new ViewerClass(parentDiv, options.viewerConfig);\n      }\n\n      this.viewer.start(undefined, undefined, undefined, undefined, options.viewerStartOptions);\n    }\n\n    /**\n       * Method that can be overwritten to log errors to service. Default implementation just logs to console.error.\n       * @param args The messages and other things that should be logged.\n       * @private\n       */ }, { key: \"_onError\", value: function _onError()\n    {var _console;\n      (_console = console).error.apply(_console, arguments);\n    }\n\n    // Resets tools, UI, camera, and refPoint. To be called when an explicit view switch occurred instead of just toggling visibility of models.\n  }, { key: \"reset\", value: function reset() {\n\n      // hide all previously visible models, so that there are no visible models in the viewer anymore.\n      // This will make sure that the viewer will configured itself properly when adding the first new model.\n      this.hideAll();\n\n      // make sure that the camera is reset when new models are added\n      this.pendingCamera = null;\n      this.cameraInitialized = false;\n\n      // Reset UI and tools on next model-add\n      this.resetOnNextModelAdd = true;\n\n      // Make sure that no LMV tools remain in the middle of an interaction - like measurements, sections etc.\n      this._stopActiveTools();\n\n      // Finish previous diff and discard cached diff results when switching to another view\n      this._unloadDiffTool(true);\n\n      // Consider that refPoint may change with next viewable\n      this.refPoint = undefined;\n\n      this.loadersInProgress = {};\n    }\n\n    // Find lmv model for given bubbleNode or key.\n  }, { key: \"getModel\", value: function getModel(node) {\n      var item = this._getItem(node);\n      return item && item.model;\n    }\n\n    // Find lmv model for given bubbleNode or key.\n    // If the model is not available yet, wait until it's ready.\n  }, { key: \"getModelAndWait\", value: function getModelAndWait(node) {var _this = this;\n      return new Promise(function (resolve) {\n        var onEvent = function onEvent() {\n          var model = _this.getModel(node);\n\n          if (model) {\n            _this.viewer.removeEventListener(Autodesk.Viewing.MODEL_ADDED_EVENT, onEvent);\n            _this.onLoad.splice(_this.onLoad.indexOf(onEvent), 1);\n            return resolve(model);\n          }\n        };\n\n        var model = _this.getModel(node);\n\n        if (model) {\n          return resolve(model);\n        }\n\n        _this.viewer.addEventListener(Autodesk.Viewing.MODEL_ADDED_EVENT, onEvent);\n        _this.onLoad.push(onEvent);\n      });\n    } }, { key: \"isEmpty\", value: function isEmpty()\n\n    {\n      return !this.getVisibleNodes().length;\n    }\n\n    // - If showing a 3D model, and until now all are 2D -> reset and set is3D = true\n    //   (In this case areAllNodes2D doesn't include the newly added 3D model yet)\n    // - If hiding a 3D model, and now all are 2D -> reset and set is3D = false\n    //   (If we call this function after already hiding the 3D model, areAllNodes2D won't include it)\n  }, { key: \"_initForEnvironmentChange\", value: function _initForEnvironmentChange(bubbleNode, isShowing) {\n      if (this.areAllNodes2D() && bubbleNode.is3D()) {\n        this.is3D = isShowing;\n\n        var item;\n        if (!isShowing) {\n          // When hiding a 3D model, we need to update using one of the 2D models\n          var filter2D = function filter2D(item) {return item.visible && item.node && item.node.is2D();};\n          item = Object.values(this.modelItems).filter(filter2D)[0];\n          bubbleNode = item.node;\n        }\n\n        // Make sure that the right extensions are loaded/unloaded\n        this._updateExtensions(bubbleNode);\n        // Before loading a 3D viewable, we must choose a refPoint for the view.\n        this._updateRefPoint(bubbleNode);\n        // Make sure the UI is reset for the correct mode\n        if (isShowing) {\n          this.resetOnNextModelAdd = true;\n          this.resetTriggeringBubble = bubbleNode;\n        } else if (item.model) {\n          this._resetOnModeSwitch(item.model);\n          this.viewer.impl.setUp2DMode(item.model, false);\n          this.viewer.getExtension('Autodesk.ViewCubeUi', function (ext) {return ext.displayViewCube(false, false);});\n        }\n      }\n    } }, { key: \"_needsReset\", value: function _needsReset(\n\n    bubbleNode) {\n      if (!this.resetOnNextModelAdd) {\n        return false;\n      }\n\n      if (this.resetTriggeringBubble && this.resetTriggeringBubble !== bubbleNode) {\n        return false;\n      }\n\n      return true;\n    }\n\n    // Makes sure that a model is loaded and shown\n    // Returns a promise with the model\n    // @param {BubbleNode} node\n    // @param {Object} [customLoadOptions] - Optional extra loadOptions to override/extend the default ones. Used only if load is needed.\n  }, { key: \"show\", value: function show(bubbleNode, customLoadOptions) {\n\n      // Auto-Configure for 2D or 3D based on first node to show\n      var isFirstViewable = this.isEmpty();\n      if (isFirstViewable) {\n        this._initForFirstViewable(bubbleNode);\n      } else {\n        this._initForEnvironmentChange(bubbleNode, true);\n      }\n\n      var modelKey = bubbleNode.getModelKey();\n\n      // Either load model or show it directly\n      var model = this.getModel(modelKey);\n      var promise;\n      if (model) {\n        if (this._needsReset(bubbleNode)) {\n          this.resetTriggeringBubble = null;\n          this.resetOnNextModelAdd = false;\n          this._resetOnModeSwitch(model);\n        }\n        // Need to set before the call to _showModel here, since _updateUpVector needs the updated value\n        this.modelItems[modelKey].visible = true;\n        this._showModel(model);\n        promise = Promise.resolve(model);\n      } else {\n        // Model will be added later when root is loaded\n        promise = this.load(bubbleNode, customLoadOptions);\n        // After load(), the model item always exists\n        this.modelItems[modelKey].visible = true;\n      }\n\n      // keep memTracker up-to-date about visible/used models\n      this._updateModelTimestamps();\n\n      // consolidate new models if possible\n      this._consolidateVisibleModels();\n\n      return promise;\n    } }, { key: \"hide\", value: function hide(\n\n    bubbleNode) {\n      var item = this._getItem(bubbleNode);\n      if (!item) {\n        return;\n      }\n\n      if (this.options.unloadUnfinishedModels && (!item.model || !item.model.isLoadDone())) {\n        this.unload(item.node); // Unload will cancel pending loaders in case there's no model yet\n      } else if (item.model) {\n        // Note that the model root might not be loaded yet. In this case, we don't need to call hideModel:\n        // onModelLoaded() callback takes care that new models are only added if still set to visible.\n        this.viewer.hideModel(item.model.id);\n      }\n\n      item.visible = false;\n\n      updateHomeCamera(this.viewer); // Recompute home-view for remaining visible models\n      this._updateUpVector();\n\n      // Make sure that a model is unloaded immediately if memory is low\n      this._cleanupModels();\n\n      this._initForEnvironmentChange(item.node, false);\n    } }, { key: \"isVisible\", value: function isVisible(\n\n    bubbleNode) {\n      var item = this._getItem(bubbleNode);\n      return item && item.visible;\n    } }, { key: \"hideAll\", value: function hideAll()\n\n    {\n      for (var key in this.modelItems) {\n        this.hide(key);\n      }\n    } }, { key: \"getVisibleNodes\", value: function getVisibleNodes()\n\n    {\n\n      var nodes = [];\n      for (var key in this.modelItems) {\n        // Note that item.model may be null during loading, so we cannot use item.model.getDocumentNode()\n        var item = this.modelItems[key];\n        if (item.visible) {\n          nodes.push(item.node);\n        }\n      }\n      return nodes;\n    } }, { key: \"areAllNodes2D\", value: function areAllNodes2D()\n\n    {\n      var nodes = this.getVisibleNodes();\n      if (nodes.length) {\n        // If the node is not a BubbleNode, it is an image, and it should be considered as 2d as well.\n        return nodes.every(function (node) {return !(node instanceof Autodesk.Viewing.BubbleNode) || node.is2D();});\n      }\n\n      return false;\n    }\n\n    // Checks if the Otg manifest for a 3D viewable is available and complete. If not, it reports an error and returns false.\n  }, { key: \"isOtgManifestMissing\", value: function isOtgManifestMissing(bubbleNode) {\n\n      if (bubbleNode.is2D()) {\n        return false;\n      }\n\n      var otgNode = bubbleNode.getOtgGraphicsNode();\n      if (otgNode && !otgNode.error) {\n        return false;\n      }\n\n      // This can only happen if the overall manifest conversion\n      // succeeded, but conversion failed for some of its viewables.\n      // A failure of the whole document conversion should have been handled outside on manifest load already.\n      if (!otgNode) {\n        this._onError(\"Otg node missing for viewable '\".concat(bubbleNode.name(), \"'.\"));\n      } else {\n        this._onError(\"Otg translation failed for viewable '\".concat(bubbleNode.name(), \"'. Error:\"), otgNode.error);\n      }\n\n      if (this.onViewerNotification) {\n        this.onViewerNotification('error', \"Model Translation failed for viewable: '\".concat(bubbleNode.name(), \"'.\"));\n      }\n\n      return true;\n    }\n\n    // @param {BubbleNode} node \n    // @param {Object} [customLoadOptions] - Optional extra loadOptions to override/extend the default ones.\n  }, { key: \"load\", value: function load(bubbleNode) {var _this2 = this;var customLoadOptions = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : null;\n\n      // customLoadOptions is only provided if the client calls load() manually from outside. Usually, load() is rather called internally\n      // by AggregatedView whenever we show a model that is not cached yet. For those internal load() calls, custom loadOptions are controlled\n      // via a callback specified in AggregatedView options.\n      if (!customLoadOptions && this.options.getCustomLoadOptions) {\n        customLoadOptions = this.options.getCustomLoadOptions(bubbleNode);\n      }\n\n      // get or create model item\n      var modelKey = makeKey(bubbleNode);\n      var item = this.modelItems[modelKey];\n      if (!item) {\n        item = createModelItem(bubbleNode);\n        this.modelItems[modelKey] = item;\n      }\n\n      // do nothing if model load was triggered before\n      if (item.model) {\n        return Promise.resolve(item.model);\n      }\n      if (item.loading || item.error) {\n        return Promise.reject('Model load was already triggered');\n      }\n\n      // For 3D models, we need some extra code for globalOffset handling\n      if (bubbleNode.is3D()) {\n\n        // Defer loading if necessary\n        if (this.waitForFirstModel) {\n          // Another 3D viewable is loading. We have to wait for it, so that we \n          // know which globalOffset to use. Loading will be triggered in _modelRootLoadEnded() later.\n          return new Promise(function (resolve, reject) {\n            _this2.loadPendingPromises[modelKey] = { resolve: resolve, reject: reject };\n          });\n        }\n\n        // If globalOffset is not initialized yet, block other models until this one is finished\n        if (!this.options.ignoreGlobalOffset && !this.globalOffset) {\n          this.waitForFirstModel = true;\n        }\n      }\n\n      item.loading = true;\n\n      // If client requires Otg for 3D viewables, check if Otg manifest is available and complete for 3D case.\n      if (this.options.disableSvf && this.isOtgManifestMissing(bubbleNode)) {\n        return Promise.reject('OTG manifest missing');\n      }\n\n      // Get LMV document to obtain acm session\n      var root = bubbleNode.getRootNode();\n      var doc = root.getDocument();\n\n      var loadOptions = {\n        // model is translated by -globalOffset. If undefined, LMV uses the model center.\n        globalOffset: this.globalOffset,\n\n        // consider geo-referencing for consistent placement: If the model contains a georeferencing transform,\n        // it is applied by LMV at load-time.\n        applyRefPoint: true,\n\n        isAEC: true,\n\n        // A too fine-grained BVH reduces the performance gain when using consolidation. This is avoided by using the recommended BVH defaults.\n        // When setting useConsolidation to true (default for AEC), this would be done automatically. But this would also run consolidation preprocessing when\n        // a model is loaded, which may temporarily affect the framerate and bypass the memory tracking. Therefore, we run consolidation\n        // later as soon as all animations are finished.\n        bvhOptions: avp.Consolidation.getDefaultBVHOptions(),\n        useConsolidation: false,\n\n        // We don't want LMV to auto-add models on load, but control adding of models ourselves instead. E.g., because:\n        //  - The user might have toggled the model off or done a view switch meanwhile\n        //  - The model might just be loaded for other purposes than show (e.g. support models for 2D diff)\n        loadAsHidden: true,\n\n        // Remember bubble node. This simplifies debugging, e.g. by helping to get the view name for a model.\n        bubbleNode: bubbleNode,\n\n        // Reduce memory consumption by computing bounding boxes on-the-fly. This is only a problem for the model explode tool, which we do not use.\n        disablePrecomputedNodeBoxes: true,\n\n        // Avoid LMV from auto-resetting the camera on model-add. E.g., we don't want to jump the camera around just because we toggled visibility of a model.\n        preserveView: true,\n\n        // Track progress of fragment list loading (used for diff progress bar)\n        onFragmentListLoadProgress: function onFragmentListLoadProgress() {return _this2._updateDiffLoadProgress();},\n\n        // Finding layers in propDb adds significant effort to the worker. If any client of AggregatedView wants to use 3DModelLayers,\n        // we can add an option for that - or allow some general customization of load options.\n        disable3DModelLayers: true,\n\n        // Avoid loadDocumentNode() from auto-unloading all other models\n        keepCurrentModels: true,\n\n        // Prevent the creation of LMV's default UI.\n        headlessViewer: this.options.headlessViewer,\n\n        // Load Leaflet models in page coordinates by default.\n        leafletOptions: { fitPaperSize: true } };\n\n\n      var onModelLoaded = this._onModelLoaded.bind(this);\n      var onModelLoadFailed = function onModelLoadFailed(errorCode) {return _this2._onModelLoadFailed(bubbleNode, errorCode);};\n\n      if (customLoadOptions) {\n        Object.assign(loadOptions, customLoadOptions);\n      }\n\n      return new Promise( /*#__PURE__*/function () {var _ref = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee(resolve, reject) {return regeneratorRuntime.wrap(function _callee$(_context) {while (1) {switch (_context.prev = _context.next) {case 0:\n\n                  // Allow alignmentService to customize the refPointTransform in the loadOptions. If no service or no matrix is specified,\n                  // applyAlignmentservice() just resolves immediately (default).\n                  _this2._applyAlignmentService(bubbleNode, loadOptions).then(\n                  function () {return _this2.viewer.loadDocumentNode(doc, bubbleNode, loadOptions);}).\n                  then(function (model) {\n                    onModelLoaded(model);\n                    resolve(model);\n                  }).catch(function (error) {\n                    onModelLoadFailed(error);\n                    reject(error);\n                  });case 1:case \"end\":return _context.stop();}}}, _callee);}));return function (_x, _x2) {return _ref.apply(this, arguments);};}());\n\n    } }, { key: \"unloadUnderlayRaster\", value: function unloadUnderlayRaster(\n\n    bubbleNode) {\n      var models = this.viewer.getAllModels();\n      var underlayRasterModel = models.find(function (model) {var _docNode$getDocument, _bubbleNode$getDocume;\n        var docNode = model.getDocumentNode();\n        return docNode && ((_docNode$getDocument = docNode.getDocument()) === null || _docNode$getDocument === void 0 ? void 0 : _docNode$getDocument.getPath()) === ((_bubbleNode$getDocume = bubbleNode.getDocument()) === null || _bubbleNode$getDocume === void 0 ? void 0 : _bubbleNode$getDocume.getPath()) &&\n        docNode.guid() === bubbleNode.guid() && model.getData().underlayRaster;\n      });\n\n      if (underlayRasterModel) {\n        this.viewer.unloadModel(underlayRasterModel);\n      }\n    } }, { key: \"unload\", value: function unload(\n\n    bubbleNode) {\n      this.unloadUnderlayRaster(bubbleNode);\n\n      this.viewer.unloadDocumentNode(bubbleNode);\n\n      // Usually, item will exist - unless the model was not loaded via AggregatedView.\n      var item = this._getItem(bubbleNode);\n      if (item) {\n        // Signal that model loading was cancelled.\n        // Why needed?: The model we just unloaded might have been the first one - and others might be waiting for it to obtain the globalOffset.\n        if (item.loading) {\n          this._onModelLoadEnded(item);\n        }\n\n        // Remove model from overall geometry-load progress tracking.\n        // TODO: We shouldn't have to care for this here. We should better add general support of aggregated load progress in Viewer3D directly.\n        if (item.model) {\n          delete this.loadersInProgress[item.model.id];\n        }\n      }\n\n      // delete item state\n      var key = makeKey(bubbleNode);\n      delete this.modelItems[key];\n\n      // set themingState to inactive, so that colors are re-applied in case the model is reloaded\n      var state = this.modelThemingStates[key];\n      if (state) {\n        state.active = false;\n      }\n\n      // Notify listener callbacks\n      this.onUnload.forEach(function (cb) {return cb(bubbleNode);});\n    } }, { key: \"unloadAll\", value: function unloadAll(\n\n    itemFilter) {\n      var keys = Object.keys(this.modelItems).slice();\n      for (var i = 0; i < keys.length; i++) {\n        var key = keys[i];\n        var item = this.modelItems[key];\n\n        if (!itemFilter || itemFilter(item)) {\n          this.unload(item.node);\n        }\n      }\n    }\n\n    // Set camera in global coords.\n    //  - The current global offset is automatically subtracted\n    //  - You don't have to specify all members, e.g., can leave out up or fov. Only defined values are replaced.\n    //  - You can call it independent of loading state: If no model is loaded yet, the camera change is applied after first model add\n    //  - Note that the call only has effect on current view, i.e., is discarded on reset/viewSwitch calls.\n  }, { key: \"setCameraGlobal\", value: function setCameraGlobal(camera) {\n      // We copy the vector-values to avoid time-dependent traps if input vectors are changed after the call\n      this.pendingCamera = {\n        position: camera.position && new THREE.Vector3().copy(camera.position),\n        target: camera.target && new THREE.Vector3().copy(camera.target),\n        up: camera.up && new THREE.Vector3().copy(camera.up),\n        fov: camera.fov,\n        isPerspective: camera.isPerspective };\n\n\n      // Apply camera right now if possible - otherwise later after camera initialize on first model add\n      this._applyPendingCameraWhenReady();\n    } }, { key: \"setCamera\", value: function setCamera(\n\n    camera) {\n      this.viewer.impl.setViewFromCamera(camera, true);\n      this.cameraInitialized = true;\n    } }, { key: \"startBimWalk\", value: function startBimWalk()\n\n    {\n      this.bimWalkStartPending = true;\n      this._startBimWalkWhenReady();\n    } }, { key: \"stopBimWalk\", value: function stopBimWalk()\n\n    {\n      var ext = this.viewer.getExtension(ExtNames.BimWalk);\n      if (ext && ext.isActive()) {\n        ext.deactivate();\n      }\n      // If a start was pending, cancel it.\n      this.bimWalkStartPending = false;\n    } }, { key: \"isBimWalkActive\", value: function isBimWalkActive()\n\n    {\n      var ext = this.viewer.getExtension('Autodesk.BimWalk');\n      return ext && ext.activeStatus || this.bimWalkStartPending;\n    }\n\n    // Use this for explicit view switches. See setNodes() for params.\n  }, { key: \"switchView\", value: function switchView(bubbleNodes, diffConfig) {\n      this.reset();\n      this.setNodes(bubbleNodes, diffConfig);\n    }\n\n    // Load/Unload models so that the currently loaded models matches with the given list of svfs.\n    //\n    // Note: Use switchView() to do an explicit view switch (including resetting tools/camera)\n    //       Use setModels() to reconfiguring which models are visible in the current view.\n    //\n    //  @param {av.BubbleNode|av.BubbleNode[]} bubbleNodes  - The nodes to be shown.\n    //  @param {Object]          [diffConfig]               - Options to activate diff views.\n    //\n    // A diffConfig contains:\n    //  @param {av.BubbleNode[]} [diff.primaryBubbles]      - A subset of 'bubbleNodes' that participates in the diff. If 'bubbleNodes' contains more, these will be ghosted.\n    //                                                        These nodes represent the current/as-is state.\n    //  @param {av.BubbleNode[]} [diff.diffBubbles]         - Length must match primaryBubbles. For each node primaryBubbles[i], diffBubbles[i] provides the corresponding \"before\" state to compare against.\n    //  @param {av.BubbleNode}   [diff.supportBubbles.diff] - If svfs are sheet nodes, diff.supportModels must provide\n    //                                                        the bubbleNodes for the corresponding 3D support models. { diff, primary }\n    //  @param {av.BubbleNode}   [diff.supportBubbles.primary]\n    //  @param {bool}            [diff.supportBubbles.autoDetect] - If true, support models are automatically found - works for Revit models with master views.\n  }, { key: \"setNodes\", value: function setNodes(bubbleNodes, diffConfig) {var _this3 = this;\n\n      // Don't be pedantic if just called with a single node or null\n      bubbleNodes = bubbleNodes || [];\n      bubbleNodes = bubbleNodes instanceof av.BubbleNode ? [bubbleNodes] : bubbleNodes;\n\n      // Do batch-request for all alignment transforms that we may need\n      this.fetchAlignmentsForNodes(bubbleNodes);\n\n      // Collect nodes that are to be changed to visible\n      var modelMustBeShown = function modelMustBeShown(node) {return !_this3.isVisible(node);};\n      var modelsToShow = bubbleNodes.filter(modelMustBeShown); // {LMVModelLink[]}\n\n      // Create temp object to check which nodes finally to be shown\n      var newModelKeys = {}; // {string[]}\n      bubbleNodes.forEach(function (node) {newModelKeys[node.getModelKey()] = true;});\n\n      // Collect nodes to be unloaded\n      var modelMustBeHidden = function modelMustBeHidden(node) {return newModelKeys[node.getModelKey()] === undefined;};\n      var modelsToHide = this.getVisibleNodes().filter(modelMustBeHidden); // {av.BubbleNode[]}\n\n      // Unload first. This will also reset the global offset if the set of model changed completely\n      modelsToHide.forEach(function (svf) {_this3.hide(svf);});\n\n      // Load all new models\n      modelsToShow.forEach(function (node) {_this3.show(node);});\n\n      // Enable and configure diff, or disable if diffConfig is null.\n      this._setDiff(diffConfig);\n    }\n\n    // May be null if extension is not loaded yet.\n  }, { key: \"getFloorSelector\", value: function getFloorSelector() {\n      return this.levelsExtension && this.levelsExtension.floorSelector;\n    }\n\n    // Define the set of BubbleNodes for which we create InCanvas-Bookmarks.\n    //  @param {BubbleNode[]} bookmarks\n  }, { key: \"setBookmarks\", value: function setBookmarks(bookmarks) {\n      this.bookmarks = bookmarks;\n      this._updateBookmarks();\n    }\n\n    // Returns true if all pending loading is finished. More concrete, it means that there is no...\n    //  - model-root loading\n    //  - geometry loading, or\n    //  - propDbLoading\n    // pending or in progress.\n  }, { key: \"isLoadDone\", value: function isLoadDone() {\n      for (var key in this.modelItems) {\n        var item = this.modelItems[key];\n        var model = item && item.model;\n        var modelRootPending = !model && !item.error;\n        var geomPending = model && !model.isLoadDone();\n        var propDbPending = model && model.getPropertyDb() && !model.getPropertyDb().isLoadDone();\n        var texLoading = avp.TextureLoader.requestsInProgress() > 0;\n\n        if (modelRootPending || geomPending || propDbPending || texLoading) {\n          return false;\n        }\n      }\n      return true;\n    }\n\n    // Returns a promise that resolves when isLoadDone() returns true.\n  }, { key: \"waitForLoadDone\", value: function waitForLoadDone() {var _this4 = this;\n      return new Promise(function (resolve) {\n\n        if (_this4.isLoadDone()) {\n          resolve();\n        }\n\n        // On each load-relevant event, check if loading is finished.\n        var onEvent = function onEvent() {\n\n          if (!_this4.isLoadDone()) {\n            return;\n          }\n\n          _this4.viewer.removeEventListener(av.GEOMETRY_LOADED_EVENT, onEvent);\n          _this4.viewer.removeEventListener(av.OBJECT_TREE_CREATED_EVENT, onEvent);\n          _this4.viewer.removeEventListener(av.TEXTURES_LOADED_EVENT, onEvent);\n          _this4.onUnload.splice(_this4.onUnload.indexOf(onEvent), 1);\n\n          resolve();\n        };\n\n        // register event listeners to try again if something changes\n        _this4.viewer.addEventListener(av.GEOMETRY_LOADED_EVENT, onEvent);\n        _this4.viewer.addEventListener(av.OBJECT_TREE_CREATED_EVENT, onEvent);\n        _this4.viewer.addEventListener(av.TEXTURES_LOADED_EVENT, onEvent);\n        _this4.onUnload.push(onEvent);\n      });\n    }\n\n    // Register a service to load custom alignment transforms. Must be specified before model loading starts.\n    //\n    //  @param {AlignmentService} alignmentService - Must implement alignmentService.loadTransform() function.\n  }, { key: \"setAlignmentService\", value: function setAlignmentService(alignmentService) {\n      this.alignmentService = alignmentService;\n    }\n\n    // Make batch request to get alignment transforms for all models that we are going to display.\n    // This avoids that we do not make individual requests for each model to be loaded.\n    //\n    // Note:\n    //   If you use setNodes() or switchView() with all nodes to be shown at once, this function is called automatically\n    //   You only need to call fetchAlignmets() yourself if you call show/load directly or if the first call to setNodes() doesn't contain\n    //   all models yet (e.g. because only a subset of manifests is loaded).\n    // \n    //  @param {string[]} versionUrns\n  }, { key: \"fetchAlignments\", value: function () {var _fetchAlignments = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee3(urns) {var _this5 = this;var doFetch, promise;return regeneratorRuntime.wrap(function _callee3$(_context3) {while (1) {switch (_context3.prev = _context3.next) {case 0:if (\n\n\n                this.isUsingAlignmentService()) {_context3.next = 2;break;}return _context3.abrupt(\"return\");case 2:\n\n\n\n                doFetch = /*#__PURE__*/function () {var _ref2 = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee2() {var alignmentService;return regeneratorRuntime.wrap(function _callee2$(_context2) {while (1) {switch (_context2.prev = _context2.next) {case 0:_context2.next = 2;return (\n\n\n                              _this5.getAlignmentService());case 2:alignmentService = _context2.sent;_context2.next = 5;return (\n\n\n\n\n                              alignmentService.fetchItems(urns));case 5:case \"end\":return _context2.stop();}}}, _callee2);}));return function doFetch() {return _ref2.apply(this, arguments);};}();\n\n\n                // Keep promise, so that we can wait for it before we load anything.\n                promise = doFetch();\n                this.pendingAlignmentFetches.push(promise);\n\n                // Resolve afer fetch is done\n                _context3.next = 7;return promise;case 7:return _context3.abrupt(\"return\", _context3.sent);case 8:case \"end\":return _context3.stop();}}}, _callee3, this);}));function fetchAlignments(_x3) {return _fetchAlignments.apply(this, arguments);}return fetchAlignments;}()\n\n\n    // Shortcut to fetch alignments for BubbleNodes\n  }, { key: \"fetchAlignmentsForNodes\", value: function fetchAlignmentsForNodes(nodes) {\n      var urns = nodes === null || nodes === void 0 ? void 0 : nodes.map(function (node) {return node.getRootNode().urn();});\n      this.fetchAlignments(urns);\n    }\n\n    // \"Support models\" are 3D models that augment 2D diffs for better results: Instead of comparing the 2D objects directly,\n    // the correspodning 3D counterparts are compared. This is more reliable and avoids false positives due to irrelevant plotting differences.\n    // We use master views as support models, because they contain all objects of a given phase.\n    //\n    // Given a bubble node referring to a 2D sheet node, this function returns\n    // the bubbleNode of the corresponding 3D master view that belongs to the same phase.\n    // This can be used as \"support model\" to obtain better results for 2D diff.\n  }, { key: \"_setDiff\",\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n    // ---------------------------\n    // Internal member functions:\n    // ---------------------------\n    value: function _setDiff(\n    diff) {\n      if (diff) {\n        this.diff.diffBubbles = diff.diffBubbles;\n        this.diff.primaryBubbles = diff.primaryBubbles;\n        this.diff.diffBubbleLabel = diff.diffBubbleLabel;\n        this.diff.primaryBubbleLabel = diff.primaryBubbleLabel;\n        this.diff.progressCallback = diff.progressCallback;\n        this.diff.supportBubbles = diff.supportBubbles;\n        this.diff.empty = diff.empty;\n        this.diff.refNames = diff.refNames;\n\n        // If support models are needed, make sure that they are loaded (if necessary)\n        var support = diff.supportBubbles;\n        if (support) {\n          // Detect support bubbles if wanted\n          support.autoDetect && AggregatedView.findDiffSupportModels(diff);\n\n          // Only use support models if we succeeded to find them for diff and primary\n          if (support.diff && support.primary) {\n            // Load support models\n            this.load(support.primary);\n            this.load(support.diff);\n          } else {\n            // We couldn't find support models\n\n            // Check if it's a 2D Diff (otherwise we don't need supportBubbles)\n            var node = diff.diffBubbles && diff.diffBubbles[0];\n            var is2D = node && node.is2D();\n\n            // If we have to run 2D diff without support models, we better warn,\n            // because the diff results may not be ideal.\n            is2D && console.warn('Could not find support models for 2D diff.');\n            this.diff.supportBubbles = null;\n          }\n        }\n\n        // start progress bar right now - so that it is also visible if\n        // we have to load some models first.\n        if (!diff.empty && diff.progressCallback) {\n          this._signalDiffLoadProgress(0, true);\n        }\n\n        this.diffStartTime = performance.now();\n      } else\n      {\n        this.diff.diffBubbles = undefined;\n        this.diff.primaryBubbles = undefined;\n        this.diff.diffBubbleLabel = undefined;\n        this.diff.primaryBubbleLabel = undefined;\n        this.diff.progressCallback = undefined;\n        this.diff.supportBubbles = undefined;\n        this.diff.refNames = undefined;\n      }\n      this.diff.enabled = Boolean(diff);\n      this.diffNeedsUpdate = true;\n      this._updateDiff();\n    }\n\n    // Set the correct world up vector when switching from 3D to 2D\n  }, { key: \"_updateUpVector\", value: function _updateUpVector() {\n      var worldUpVector;\n      if (this.areAllNodes2D()) {\n        worldUpVector = new THREE.Vector3(0, 1, 0);\n      } else {\n        // Get vector from the first 3D model\n        var filter3D = function filter3D(item) {return item.visible && item.node && item.node.is3D();};\n        var item = Object.values(this.modelItems).filter(filter3D)[0];\n        if (item && item.model) {\n          worldUpVector = getUpVector(item.model);\n        } else {\n          worldUpVector = new THREE.Vector3(0, 0, 1); // A default up vector for 3D\n        }\n      }\n      this.viewer.navigation.setWorldUpVector(worldUpVector, false, true);\n    }\n\n    // add model to LMV scene (must be in memory)\n  }, { key: \"_showModel\", value: function _showModel(model) {\n\n      // In rare cases, the model geometry might be empty. For this case, we don't add the model to LMV.\n      // This avoids the pedantic \"Model is empty\" warning and possibly other detail issues due to an empty model bbox.\n      // Note that we don't want this warning, because it is not a big problem if one out of many models is empty.\n      // E.g., this may happen if a model has no geometry for the selected phase.\n      if (model.is3d() && !model.hasGeometry()) {\n        var modelName = model.getDocumentNode().getRootNode().children[0].name();\n        console.warn('Ignored model with empty geometry: ', modelName);\n        return;\n      }\n\n      // Skip any automatic tool reset from LMV. We trigger these explicitly,\n      // but only if an explicit view switch (=> LMVViewer.reset()) has occurred.\n      // Reason: We only want tool resets on explicit view switches. The scene may\n      //         also be just temporarily empty when toggling visibility of models.\n      //         In this case, we don't want any automagic resets.\n      var preserveTools = true;\n      this.viewer.showModel(model.id, preserveTools);\n\n      // Consider new visible model for home camera\n      updateHomeCamera(this.viewer);\n      this._updateUpVector();\n    }\n\n    // Reset UI when switching from 2D or 3D (or when loading for the first time)\n  }, { key: \"_resetOnModeSwitch\", value: function _resetOnModeSwitch(model) {var _this6 = this;\n      // Unload ZoomWindow and reload after recreating UI\n      if (this.viewer.getExtension(ExtNames.ZoomWindow)) {\n        this.viewer.unloadExtension(ExtNames.ZoomWindow);\n      }\n\n      if (!this.options.headlessViewer) {\n        this.viewer.createUI(model, true);\n      }\n\n      // Temporarily remove lock to make sure the navigation tool is changed\n      var prevLock = this.viewer.setNavigationLock(false);\n      this.viewer.activateDefaultNavigationTools(!this.is3D);\n      this.viewer.setNavigationLock(prevLock);\n\n      this.viewer.navigation.setIs2D(!this.is3D);\n\n      // Integrate the zoom window functionality. This also automatically\n      // moves the Zoom tool into this submenu.\n      this._loadExtension(ExtNames.ZoomWindow).catch(function (err) {return _this6._onError(err);});\n\n      // If startBimWalk() was called for this view, activate it\n      this._startBimWalkWhenReady();\n    } }, { key: \"_onModelAdded\", value: function _onModelAdded(\n\n    event) {\n\n      var model = event.model;\n\n      // if camera is not initialized yet, use default camera from the first added model.\n      // TODO: Think about some cleaner choice of the start camera that doesn't depend on\n      //       what is loaded first. But it's not fully clear how to define it, because\n      //       the list of displayed models may change arbitrarily and we don't know bboxes in advance...\n      if (!this.cameraInitialized) {\n        this._initCamera(model);\n      }\n\n      if (model.getData().underlayRaster) {\n        return;\n      }\n\n      // make sure that the model is rendered using the current viewer's globalOffset\n      if (model.is3d() && this.options.useDynamicGlobalOffset) {\n        model.setGlobalOffset(this.viewer.impl.camera.globalOffset);\n        this.viewer.impl.onModelTransformChanged(model);\n      }\n\n      var node = event.model.getDocumentNode();\n\n      if (this._needsReset(node)) {\n        this.resetTriggeringBubble = null;\n        this.resetOnNextModelAdd = false;\n        this._resetOnModeSwitch(model);\n      }\n\n      // log console warning if model is empty\n      warnIfModelEmpty(model);\n\n      // Image files don't have a document node. In that case, skip ghosting part, which is not relevant to images anyway.\n      if (node) {\n        // Make sure that ghosting is applied if needed. Removing a model resets visibility,\n        // so we assume isModelGhosted as false.\n\n        var modelKey = node.getModelKey();\n        delete this.modelIsGhosted[modelKey];\n        this._updateGhosting();\n      }\n    }\n\n    // Called whenever the geometry of a model has finished loading.\n  }, { key: \"_onGeometryLoaded\", value: function _onGeometryLoaded(event) {\n      this._consolidateVisibleModels();\n      this._updateDiff();\n      this.loadersInProgress[event.model.id] = 100;\n    } }, { key: \"_onExtensionLoaded\", value: function _onExtensionLoaded(\n\n    event) {\n      var extName = event.extensionId;\n\n      // If startBimWalk has been called before BimWalk was loaded, start it when ready\n      this._startBimWalkWhenReady();\n\n      if (extName === ExtNames.Levels) {\n        this.levelsExtension = this.viewer.getExtension(ExtNames.Levels);\n      }\n\n      // Make sure that BookmarksExtension gets current bookmarks when loaded\n      if (extName === ExtNames.Bookmarks) {\n        this._updateBookmarks();\n      }\n    } }, { key: \"_registerLmvEventListeners\", value: function _registerLmvEventListeners()\n\n    {\n      // As soon as all geometry is loaded, make sure that consolidation is triggered if the transition is already finished.\n      // Note that this also includes to cleanup memory if necessary.\n      this.viewer.addEventListener(av.GEOMETRY_LOADED_EVENT, this._onGeometryLoaded.bind(this));\n\n      // Update UI if a new model is added\n      this.viewer.addEventListener(av.MODEL_ADDED_EVENT, this._onModelAdded.bind(this));\n\n      this.viewer.addEventListener(av.EXTENSION_LOADED_EVENT, this._onExtensionLoaded.bind(this));\n\n      // Compute overall loading progress\n      this.viewer.addEventListener(av.PROGRESS_UPDATE_EVENT, this._onProgressUpdate.bind(this));\n\n      // If diff is enabled, make sure that it starts as soon as all required models are loaded\n      // For this, we don't need all geometry, but other data (fragments loaded + propDbLoader created).\n      // NOTE: We cannot do this in the onModelLoaded() callback, because only the MODEL_ROOT_LOADED_EVENT\n      //       is called AFTER loading the whole fragment list and creating the propDbLoader.\n      this.viewer.addEventListener(av.MODEL_ROOT_LOADED_EVENT, this._updateDiff.bind(this));\n    }\n\n    // Makes sure that all visible models and fully loaded models are consolidated if memory allows it.\n    // Triggered whenever a model finished loading, added, or if new memory gets available.\n  }, { key: \"_consolidateVisibleModels\", value: function _consolidateVisibleModels() {\n\n      // Free some memory if needed and possible\n      this._cleanupModels();\n\n      //Skip consolidation on mobile due to more limited memory on weaker devices.\n      if (isMobileDevice())\n      return;\n\n      //This duplicates logic from Viewer3D.loadDocumentNode, because AggregateView does its\n      //loadModel calls manually. We need this flag to be able to debug memory issues in Design Collab\n      var cparam = getParameterByName(\"useConsolidation\");\n      if (cparam === \"false\")\n      return;\n\n      // For each 3D model, trigger consolidation if needed and possible\n      var visibleModels = this.viewer.getVisibleModels();\n      for (var i = 0; i < visibleModels.length; i++) {\n        var model = visibleModels[i];\n\n        // Don't consolidate anything if we are running out of memory\n        if (this.memTracker.memoryExceeded()) {\n          return;\n        }\n\n        // Consolidation requires model + all geometry to be loaded\n        var modelLoaded = model && model.isLoadDone();\n        if (!modelLoaded) {\n          return;\n        }\n\n        // Skip anything 2D (sheets/leaflets)\n        if (model.is2d()) {\n          return;\n        }\n\n        // Consolidate it if not done already\n        if (!model.isConsolidated()) {\n          // consolidate model\n          var glRenderer = this.viewer.impl.glrenderer();\n          var materials = this.viewer.impl.getMaterials();\n          model.consolidate(materials, undefined, glRenderer, true);\n\n          // Consolidation raises mem-consumption. => Run cleanup again.\n          this._cleanupModels();\n        }\n      }\n    }\n\n    // Makes sure that long unused models are removed deleted to free memory if needed.\n    //\n    // It is called whenever either...\n    //  a) A model goes out of use (hideModel() call)\n    //  b) Memory consumption has grown (model geometry loaded or model consolidation was run)\n  }, { key: \"_cleanupModels\", value: function _cleanupModels() {var _this7 = this;\n\n      // Make sure that LRU timestamps are up-to-date.\n      this._updateModelTimestamps();\n\n      // define customized unloadModel function\n      var unloadModel = function unloadModel(model) {\n        var node = model.getDocumentNode();\n\n        // Usually, the model supposed to be uploaded will not be in use.\n        // But: In rare cases, the geometryLoaded event of a model might arrive earlier than the onDone() callback.\n        // Reason is that the onDone() callback is delayed by a setTimeout in GuiViewer.onSuccessChanged().\n        // Such a model is added to the viewer before we even know about it. Therefore, it doesn't have any timestamp yet.\n        //\n        // If this happens in combination with a \"close to memory limit\" scenario, the model is incorrectly classified as \"unused\"\n        // by ModelMemoryTracker. TODO: Check if we can find a more elegant solution to prevent this problem.\n        var item = _this7._getItem(node);\n        if (item && item.visible) {\n          return;\n        }\n\n        _this7.unload(node);\n      };\n\n      // let memTracker free memory if necessary\n      this.memTracker.cleanup(unloadModel);\n    }\n\n    // Update LRU timestamps for all models that are currently in use.\n    // We must overload/customize this function to consider the 2d support models\n  }, { key: \"_updateModelTimestamps\", value: function _updateModelTimestamps() {\n      var visibleModels = this.viewer.getVisibleModels().slice();\n\n      // Consider diff support models if 2D diff is active\n      var supp = this._getDiffSupportModels();\n      if (this.diff.enabled && supp) {\n        if (supp.diff) visibleModels.push(supp.diff);\n        if (supp.primary) visibleModels.push(supp.primary);\n      }\n\n      this.memTracker.updateModelTimestamps(visibleModels);\n    } }, { key: \"_stopActiveTools\", value: function _stopActiveTools()\n\n    {\n      var sectionExtension = this.viewer.getExtension('Autodesk.Section');\n      if (sectionExtension && sectionExtension.isActive()) {\n        sectionExtension.enableSectionTool(false);\n      }\n\n      this.stopBimWalk();\n\n      // Pass false to the getPropertyPanel() method, otherwise it would try to create the\n      // property panel if not yet existing.\n      var propertyPanel = !this.options.headlessViewer && this.viewer.getPropertyPanel(false);\n      if (propertyPanel && propertyPanel.isVisible()) {\n        propertyPanel.setVisible(false);\n      }\n    } }, { key: \"_onModelLoaded\", value: function _onModelLoaded(\n\n    model) {\n\n      // get model item\n      var item = this._getItem(model);\n      if (!item) {\n        // This can only happen if unload() has been called after load meanwhile.\n        // In this case, we don't need the model anymore.\n        return;\n      }\n\n      // GlobalOffset handling\n      if (model.is3d()) {\n\n        // When using dynamic globalOffset, we don't have to care about consistent globalOffsets before model loading, but just apply the consistent offset after loading.\n        if (this.options.useDynamicGlobalOffset) {\n          // Dynamic globalOffset handling\n\n          // Apply current globalOffset value of the viewer camera.\n          model.setGlobalOffset(this.viewer.impl.camera.globalOffset);\n        } else {\n          // Static globalOffset handling\n\n          // If this is the first viewable, we use it to initialize the global offset.\n          // We don't need this if we use dynamic global offsets.\n          if (this.waitForFirstModel && !this.options.ignoreGlobalOffset) {\n            this.globalOffset = new THREE.Vector3().copy(model.myData.globalOffset);\n            this._onGlobalOffsetChanged();\n          }\n        }\n      }\n\n      // Store model in modelItem\n      item.model = model;\n\n      // If item is still set to visible, add it\n      if (item.visible) {\n        this._showModel(item.model);\n      }\n\n      // Make sure that the new model gets latest timestamp for LRU caching\n      this._updateModelTimestamps();\n\n      // Update diff progress bar if a model-root of a diffModel was loaded\n      this._updateDiffLoadProgress();\n\n      // Make sure that latest theming state is applied\n      this._updateModelTheming(model);\n\n      this._onModelLoadEnded(item);\n    } }, { key: \"_onModelLoadFailed\", value: function _onModelLoadFailed(\n\n    bubbleNode, errorCode) {\n      this._onError(\"Failed to load model: \".concat(bubbleNode.name(), \". Error code: \").concat(errorCode));\n      var item = this._getItem(bubbleNode);\n      if (item) {\n        item.error = true;\n        this._onModelLoadEnded(item);\n      }\n    }\n\n    // Called if model-root load succeeded, failed, or was cancelled\n  }, { key: \"_onModelLoadEnded\", value: function _onModelLoadEnded(item) {var _this8 = this;\n      item.loading = false;\n      var bubbleNode = item.node;\n\n      // Allow other models to load\n      if (bubbleNode.is3D() && this.waitForFirstModel) {\n        // Unblock 3D model loading\n        this.waitForFirstModel = false;\n\n        // Trigger loading of any models for which loading was deferred.\n        var _loop = function _loop(key) {\n          // Note that load() already takes care that nothing is loaded twice\n          var node = _this8.modelItems[key].node;var _ref3 =\n          _this8.loadPendingPromises[key] || {},resolve = _ref3.resolve,reject = _ref3.reject;\n          _this8.load(node).then(function (model) {\n            if (resolve)\n            resolve(model);\n          }).catch(function (e) {\n            if (reject)\n            reject(e);\n          });};for (var key in this.modelItems) {_loop(key);\n        }\n\n        this.loadPendingPromises = {};\n      }\n\n      // Notify listener callbacks\n      this.onLoad.forEach(function (cb) {return cb(bubbleNode);});\n    }\n\n    /* @param {av.Model} */ }, { key: \"_initCamera\", value: function _initCamera(\n    model, withTransition) {\n      this.viewer.impl.setViewFromFile(model, !withTransition);\n\n      // Makes sure that the viewer home button is also properly working for 2D sheets.\n      this.viewer.impl.controls.recordHomeView();\n\n      this.cameraInitialized = true;\n\n      // If there was a setCameraGlobal that we couldn't apply immediately, do it now\n      if (this.pendingCamera) {\n        this._applyPendingCameraWhenReady();\n      }\n    }\n\n    // Returns item for a given bubbleNode/key/model - or undefined if unknown.\n  }, { key: \"_getItem\", value: function _getItem(bubbleNode) {\n      var key = makeKey(bubbleNode);\n      return this.modelItems[key];\n    }\n\n    // The refPoint is a 3d position from which we know that all 3d viewables to display must be close to it.\n    // We use the refPoint to determine the globalOffset that we use in LMV for loadOptions.\n    // If the refPoint changes slightly, globalOffset may remain the same. But if it is by a large value,\n    // the global offset needs to be updated - which requires a reload for all models.\n    //\n    // Purpose of all this is to determine in advance which globalOffset we have to use for loading. The globalOffset must be...\n    //    1. close to the geo-coords of each displayed model\n    //    2. known in advance (because it is used for loadOptions)\n    //    3. identical for all models displayed at once\n    //\n    // @param {BubbleNode} bubbleNode - node that is about to be shown\n  }, { key: \"_updateRefPoint\", value: function _updateRefPoint(bubbleNode) {\n\n      // We don't need to do anything here if we use dynamic global offsets.\n      if (this.options.useDynamicGlobalOffset) {\n        return;\n      }\n\n      var isFirst3DViewable = this.isEmpty() || this.areAllNodes2D();\n      if (!isFirst3DViewable || !bubbleNode.is3D() || this.options.ignoreGlobalOffset) {\n        return;\n      }\n\n      // Following code assumes that getAecModelData is called after AecModelMata was downloaded.\n      // Having no AECModelData in this case means that this is a model other than Revit\n      // and setting globalOffset to zero will essentially reset the potentially existing correct global offset\n      // If we encounter such a scenario (e.g. IFC model), we just skip updating global offset here\n      var aecModelData = bubbleNode.getAecModelData();\n      if (!aecModelData) {\n        return;\n      }\n\n      var tf = aecModelData && aecModelData.refPointTransformation; // Matrix4x3 as array[12]\n      this.refPoint = tf ?\n      { x: tf[9], y: tf[10], z: 0.0 } : // refPoint = refPointTransform * (0,0,0)\n      { x: 0, y: 0, z: 0 }; // fallback: use origin if we have no aecModelData\n\n      // Workaround: We apply the global offset only in (x,y), because:\n      //  a) The large offsets are usually only happening for (x,y)\n      //  b) An offset in z would need special handling in the LevelsExtension\n\n      // Check if the current globalOffset is sufficiently close to the refPoint to avoid inaccuracies.\n      var MaxDistSqr = 4.0e6;\n      var distSqr = this.globalOffset && THREE.Vector3.prototype.distanceToSquared.call(this.refPoint, this.globalOffset);\n      if (!this.globalOffset || distSqr > MaxDistSqr) {\n\n        this.globalOffset = new THREE.Vector3().copy(this.refPoint);\n\n        // unload all previous 3D models that we loaded with previous geo offset\n        this.unloadAll(function (item) {return item.model && item.model.is3d();});\n\n        this._onGlobalOffsetChanged();\n      }\n    } }, { key: \"_onGlobalOffsetChanged\", value: function _onGlobalOffsetChanged()\n\n    {\n      // Make sure that bookmark positions are calculated based on the latest global offset\n      var bookmarkExt = this.viewer.getExtension(ExtNames.Bookmarks);\n      if (bookmarkExt) {\n        bookmarkExt.resetGlobalOffset(this.globalOffset);\n      }\n    }\n\n    // Default extensions as used by Design Collaboration\n  }, { key: \"_getDefaultExtensions\", value: function _getDefaultExtensions() {var _this9 = this;\n      return [\n      {\n        name: ExtNames.CrossFade,\n        getLoadingCondition: function getLoadingCondition() {return !av.isMobileDevice();} },\n\n      {\n        name: ExtNames.Levels,\n        getOptions: function getOptions() {return _this9.viewer.config;} },\n\n      {\n        name: ExtNames.ModelStructure,\n        getOptions: function getOptions() {return _this9.viewer.config;} },\n\n      {\n        name: ExtNames.Hyperlinks,\n        getOptions: function getOptions() {return {\n            // Connect hyperlink handler\n            loadViewableCb: function loadViewableCb(bubbleNode, numHyperlinks) {\n              if (_this9.onHyperlink) {\n                _this9.onHyperlink(bubbleNode, numHyperlinks);\n              } else {\n                // default-handler: Trigger view switch to linked sheet\n                _this9.switchView([bubbleNode]);\n              }\n            } };} },\n\n\n      {\n        name: ExtNames.Minimap,\n        getLoadingCondition: function getLoadingCondition() {return !_this9.options.disableMinimap;},\n        getOptions: function getOptions() {return {\n            // Allow clients to track minimap usage.\n            // Todo: Finally, tracking should be consistently handled automatically inside LMV.\n            trackUsage: _this9._trackMinimapUsage ? _this9._trackMinimapUsage.bind(_this9) : undefined };} },\n\n\n      {\n        name: ExtNames.Bookmarks,\n        getLoadingCondition: function getLoadingCondition() {return _this9.is3D;},\n        getOptions: function getOptions() {return {\n            // Share global offset, so that bookmarks are placed correctly\n            globalOffset: _this9.globalOffset,\n\n            onBookmark: function onBookmark(bookmark, camera) {\n              // Forward to handler to invoke view switch\n              if (_this9.onBookmark) {\n                _this9.onBookmark(bookmark, camera);\n              } else {\n                // default handler: Invoke view-switch to selected bookmark\n                _this9.switchView([bookmark]);\n              }\n\n              // Activate BIMWalk for perspective views. It is important to do that\n              // after invoking the handler to switch views.\n              // Otherwise, BimWalk would be switched off again.\n              if (camera.isPerspective) {\n                _this9.startBimWalk();\n              }\n            },\n\n            clusterfck: _this9.options.clusterfck,\n            clusteringThreshold: 110 // threshold is (icon_width * 5), depends on \"THREE.Vector3.distanceTo()\"\n          };} },\n\n      {\n        name: ExtNames.DropMe,\n        getLoadingCondition: function getLoadingCondition() {return _this9.is3D === false;},\n        getOptions: function getOptions() {return {\n            enableGuidance: true,\n            onDrop: _this9._handleDropMe.bind(_this9), // connect DropMe handler\n            getTransformForNode: _this9._getTransformForNode.bind(_this9),\n            getMain3DView: _this9._findMain3DView.bind(_this9) };} }];\n\n\n\n    }\n\n    // The extensions array contains objects with the following spec:\n    //   name {string} - The extension's name to be loaded\n    //   getLoadingCondition {function|optional} - under what conditions the extension should be loaded. If they are not\n    //                                             met, the extension will be unloaded on _updateExtensions.\n    //                                             Receives the AggregateView instance as parameter, and the bubble node.\n    //   getOptions {function|optional} - Options to pass to the extension. Receives the AggregateView instance as parameter.\n    //   onLoadedCB {function|optional} - Called when the extension's load promise was resolved. Receives the AggregateView instance as parameter,\n    //                                    and the extension. If the promise is rejected, it passes the error instead.\n    //   onBeforeUnloadCB {function|optional} - Called when the extension is about to be unloaded. Receives the AggregateView instance as parameter.\n  }, { key: \"_loadExtensions\", value: function () {var _loadExtensions2 = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee4() {var _this10 = this;var loadingPromises;return regeneratorRuntime.wrap(function _callee4$(_context4) {while (1) {switch (_context4.prev = _context4.next) {case 0:\n                this.extensions = this.options.extensions || this._getDefaultExtensions();\n\n                loadingPromises = [];\n\n                this.extensions.forEach(function (extension) {\n                  if (!extension.getLoadingCondition || extension.getLoadingCondition(_this10)) {\n                    loadingPromises.push(_this10._loadExtension(extension.name,\n                    extension.getOptions && extension.getOptions(_this10),\n                    extension.onLoadedCB));\n                    _this10.extensionLoaded[extension.name] = true;\n                  }\n                });return _context4.abrupt(\"return\",\n\n                Promise.all(loadingPromises));case 4:case \"end\":return _context4.stop();}}}, _callee4, this);}));function _loadExtensions() {return _loadExtensions2.apply(this, arguments);}return _loadExtensions;}()\n\n\n    // Load LMV extension with given options + optional options specified via this.options.extensionOptions\n  }, { key: \"_loadExtension\", value: function () {var _loadExtension2 = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee5(extName, options, onLoadedCB) {var _this11 = this;var extOptions, customOptions, combinedOptions, promise;return regeneratorRuntime.wrap(function _callee5$(_context5) {while (1) {switch (_context5.prev = _context5.next) {case 0:\n                extOptions = this.options.extensionOptions;\n                customOptions = extOptions && extOptions[extName];\n                combinedOptions = Object.assign({}, options, customOptions);\n                promise = this.viewer.loadExtension(extName, combinedOptions);\n                if (onLoadedCB) {\n                  promise.then(function (extension) {\n                    onLoadedCB(_this11, extension);\n                  }).catch(function (error) {\n                    // If extension loading failed, pass null to the callback, and the error as third parameter\n                    onLoadedCB(_this11, null, error);\n                  });\n                }return _context5.abrupt(\"return\",\n                promise);case 6:case \"end\":return _context5.stop();}}}, _callee5, this);}));function _loadExtension(_x4, _x5, _x6) {return _loadExtension2.apply(this, arguments);}return _loadExtension;}()\n\n\n    // Load/Unload extensions depending on whether we are entering a 2D or 3D view\n  }, { key: \"_updateExtensions\", value: function _updateExtensions(bubbleNode) {var _this12 = this;\n      var toggleExtension = function toggleExtension(extName, options, enable, onLoadedCB, onBeforeUnloadCB) {\n\n        var extLoaded = _this12.extensionLoaded[extName];\n        if (!extLoaded && enable) {\n          _this12._loadExtension(extName, options, onLoadedCB).catch(function (err) {return _this12._onError(err);});\n        } else if (extLoaded && !enable) {\n          if (onBeforeUnloadCB) {\n            onBeforeUnloadCB(_this12);\n          }\n          _this12.viewer.unloadExtension(extName);\n        }\n        _this12.extensionLoaded[extName] = enable;\n      };\n\n      this.extensions.forEach(function (extension) {\n        if (extension.getLoadingCondition) {\n          toggleExtension(extension.name,\n          extension.getOptions && extension.getOptions(_this12),\n          extension.getLoadingCondition(_this12, bubbleNode),\n          extension.onLoadedCB,\n          extension.onBeforeUnloadCB);\n        }\n      });\n    } }, { key: \"_initForFirstViewable\", value: function _initForFirstViewable(\n\n    bubbleNode) {\n\n      // Check if we are about to switch between 2D and 3D view\n      var dimChanged = this.is3D !== bubbleNode.is3D();\n      if (dimChanged) {\n\n        // Make sure that UI, camera, tools etc. are reset on next model-add.\n        // This is only for convenience, so that the client doesn't have to care to call reset() from outside on 2D/3D switches.\n        // If reset() was already called, we don't do it again, because this would\n        // revert some settings (setCameraGlobal or startBimWalk) that the user might have done for this view already.\n        if (!this.resetOnNextModelAdd) {\n          this.reset();\n          this.resetTriggeringBubble = bubbleNode;\n        }\n\n        this.is3D = bubbleNode.is3D();\n      }\n\n      // Make sure that the right extensions are loaded/unloaded\n      this._updateExtensions(bubbleNode);\n\n      // Before loading a 3D viewable, we must choose a refPoint for the view.\n      this._updateRefPoint(bubbleNode);\n    } }, { key: \"_updateBookmarks\", value: function _updateBookmarks()\n\n    {\n      var ext = this.viewer.getExtension(ExtNames.Bookmarks);\n      if (!ext) {\n        // Extension is only loaded in 3D mode\n        return;\n      }\n\n      ext.resetBookmarks(this.bookmarks);\n    }\n\n    // Modify current camera based on the one specified in last setCameraGlobal call.\n  }, { key: \"_applyPendingCameraWhenReady\", value: function _applyPendingCameraWhenReady() {\n\n      // Applying the user camera requires the viewer camera to be default-initialized first.\n      // This also implies that the viewer global offset is already determined.\n      if (!this.cameraInitialized) {\n        return;\n      }\n\n      // consume pending camera overrides\n      var newCam = this.pendingCamera;\n      this.pendingCamera = null;\n\n      var cam = this.viewer.impl.camera;\n      if (newCam.position) cam.position.copy(newCam.position);\n      if (newCam.target) cam.target.copy(newCam.target);\n      if (newCam.up) cam.up.copy(newCam.up);\n      if (newCam.fov) cam.fov = newCam.fov;\n      if (newCam.isPerspective !== undefined) cam.isPerspective = newCam.isPerspective;\n\n      var globalOffset = this.globalOffset || this.viewer.model.getData().globalOffset;\n\n      // GlobalOffset only affects 3D models\n      if (this.is3D && !this.options.ignoreGlobalOffset) {\n        cam.position.sub(globalOffset);\n        cam.target.sub(globalOffset);\n      }\n\n      this.viewer.impl.syncCamera();\n    }\n\n    // Default handler: Purpose is to enable use of AggregatedView on its own and to test/demonstrate its usage.\n    //\n    // The DropMe defines the camera for the 3D view.\n    // But: What 3D view is used for that may finally vary depending on application context.\n    // For the default handler, we have no unique definition what 3D view we want to switch to. So, we have to use some heuristic choices.\n  }, { key: \"_findMain3DView\", value: function _findMain3DView(sheetNode) {\n      var masterViews = sheetNode.getMasterViews();\n\n      if (masterViews[0]) {\n        return masterViews[0];\n      }\n\n      var root = sheetNode === null || sheetNode === void 0 ? void 0 : sheetNode.getRootNode();\n\n      if (!root) {\n        return;\n      }\n\n      var views = root === null || root === void 0 ? void 0 : root.search(av.BubbleNode.MODEL_NODE);\n\n      // Check if there is some view with Revit default name \"{3D}\"\n      var isDefault3DView = function isDefault3DView(node) {return node.name() == \"{3D}\";};\n      var default3DView = views.filter(isDefault3DView)[0];\n\n      if (default3DView) {\n        return default3DView;\n      }\n\n      // last fallback - just return first 3D view we find\n      return views[0];\n    } }, { key: \"_handleDropMe\", value: function _handleDropMe(\n\n    pos, dir, mode, bubbleNode) {\n      if (this.onDrop) {\n        this.onDrop(pos, dir, mode, bubbleNode);\n        return;\n      }\n\n      // No 3D view that we can switch to\n      if (!bubbleNode) {\n        console.warn(\"DropMe handler: Document does not contain a 3D view to switch to\");\n        return;\n      }\n      this.switchView(bubbleNode);\n\n      // Setup perspective camera from DropMe input\n      if (pos && dir) {\n        var camera = {\n          position: pos,\n          target: pos.clone().add(dir),\n          isPerspective: true // Note that DropMeTool usually produces \"inside\" views, which are not possible with ortho cameras\n        };\n        this.setCameraGlobal(camera);\n      }\n    }\n\n    // Standard handler for view in 3D (available through the Drop me extension).\n    // In the case this option was selected, first the dropMe callback is called without a position\n    // (because it can only be found once the 3D model is loaded). Then this callback is called\n    // with the found position.\n  }, { key: \"_handleViewIn3D\", value: function _handleViewIn3D(position, target, isPosFrom2dTo3dMatrix, applySelectionCB) {\n      var camera = {\n        position: position,\n        target: target,\n        isPerspective: true };\n\n\n      this.setCameraGlobal(camera);\n      this.startBimWalk();\n      applySelectionCB && applySelectionCB();\n    }\n\n    // All we want is to make sure that BIMWalk will actually start if startBimWalk was called - independent of timing.\n  }, { key: \"_startBimWalkWhenReady\", value: function _startBimWalkWhenReady() {\n      if (!this.bimWalkStartPending) {\n        return;\n      }\n\n      var viewReady = !this.resetOnNextModelAdd; // tools/UI are ready for this view\n      var bimWalk = this.viewer.getExtension(ExtNames.BimWalk);\n\n      // Make sure that FusionOrbit doesn't switch BimWalk off again, because it resets NavTools on load\n      var fusionOrbit = this.viewer.getExtension(ExtNames.FusionOrbit);\n      if (viewReady && bimWalk && fusionOrbit) {\n        bimWalk.activate();\n        this.bimWalkStartPending = false;\n      }\n    } }, { key: \"_unloadDiffTool\", value: function _unloadDiffTool(\n\n    clearCache) {\n      var ext = this.viewer.getExtension(ExtNames.DiffTool);\n      if (ext) {\n        if (clearCache) {\n          // discard cached diffs\n          this.diffCache.length = 0;\n        }\n\n        this.viewer.unloadExtension(ExtNames.DiffTool);\n      }\n    }\n\n    // currently used for load progress for 2d diff (as long as we need full geometry)\n  }, { key: \"_onProgressUpdate\", value: function _onProgressUpdate(event) {\n\n      if (!event.model || event.state !== av.ProgressState.LOADING) {\n        return;\n      }\n\n      // debugging hint: use 'event.model.myData.basePath' as a key\n      this.loadersInProgress[event.model.id] = event.percent;\n\n      this._updateDiffLoadProgress();\n    } }, { key: \"_getDiffSupportModels\", value: function _getDiffSupportModels()\n\n    {\n      var supp = this.diff.supportBubbles;\n      if (!supp) {\n        return;\n      }\n      return {\n        diff: this.getModel(this.diff.supportBubbles.diff),\n        primary: this.getModel(this.diff.supportBubbles.primary) };\n\n    }\n\n    // For 2D diff: Checks if the required support models for current diff mode are fully available.\n    // If so, they are returned, otherwise it returns null.\n  }, { key: \"_diffSupportModelsReady\", value: function _diffSupportModelsReady() {\n      var supportModels = this._getDiffSupportModels();\n      var diffLoaded = supportModels.diff && supportModels.diff.isLoadDone();\n      var primaryLoaded = supportModels.primary && supportModels.primary.isLoadDone();\n      return diffLoaded && primaryLoaded;\n    }\n\n    // If diff mode is active, all models that are not participating in the diff are\n    // rendered in ghosted style.\n  }, { key: \"_updateGhosting\", value: function _updateGhosting() {\n\n      // keys of all models used in diff\n      var usedInDiff = {};\n      if (this.diff.enabled && this.diffBubbles) {\n        usedInDiff = this.diffBubbles.forEach(function (b) {return usedInDiff[b.getModelKey()];});\n      }\n\n      for (var key in this.modelItems) {\n        // skip models if root is not loaded yet\n        var model = this.getModel(key);\n        if (!model) {\n          continue;\n        }\n\n        var ghosted = this.diff.enabled && !usedInDiff[key];\n        var wasGhosted = !!this.modelIsGhosted[key];\n        if (ghosted != wasGhosted) {\n          model.setAllVisibility(!ghosted);\n\n          // keep track which models are ghosted\n          if (ghosted) {\n            this.modelIsGhosted[key] = true;\n          } else {\n            delete this.modelIsGhosted[key];\n          }\n        }\n      }\n    }\n\n    // Get array of models from given bubbleNode array.\n    // NOTE: This will be removed, because the only difference to viewer.getVisibleModels() is that it may contain null-entries\n    //       for models that are still loading. Note that _updateDiffLoadProgress() then needs some revision too, because it currently relies on these null-entries.\n  }, { key: \"getModels\", value: function getModels(bubbleNodes) {var _this13 = this;\n      return bubbleNodes.map(function (node) {return _this13.getModel(node);});\n    }\n\n    // Configures current modelTheming. \n    //  @param {Object|null} nodeToColor - maps model keys to theming colors. Use node.getModelKey() to get key of a BubbleNode.\n  }, { key: \"setModelTheming\", value: function setModelTheming(nodeToColor) {\n\n      // accept null/undefined to clear model theming\n      nodeToColor = nodeToColor || {};\n\n      var oldStates = this.modelThemingStates;\n      this.modelThemingStates = {};\n\n      // update theming states for all models to be colored\n      for (var key in nodeToColor) {\n        var state = oldStates[key];\n        var newColor = nodeToColor[key];\n        var model = this.getModel(key);\n\n        // Create new state or update existing one\n        if (!state) {\n          state = new ModelThemingState(newColor);\n        } else {\n          // set new color\n          var changed = !state.color.equals(newColor);\n          if (changed) {\n            // apply new color\n            state.color.copy(newColor);\n\n            // If the old color was active, make sure we apply the new one\n            // when we update below.\n            state.active = false;\n          }\n        }\n\n        // Store new state\n        this.modelThemingStates[key] = state;\n\n        // make sure colors are applied as specified\n        model && this._updateModelTheming(model);\n      }\n\n      // Make sure that we don't leak any outdated theming colors\n      for (var _key in oldStates) {\n        var _state = oldStates[_key];\n        var removed = !nodeToColor[_key];\n        var _model = this.getModel(_key);\n        if (removed && _state.active) {\n          _model && this.viewer.clearThemingColors(_model);\n        }\n      }\n    } }, { key: \"_signalDiffLoadProgress\", value: function _signalDiffLoadProgress(\n\n    percent, force) {\n      if (force || percent !== this._lastDiffLoadPercent) {\n        // update progress bar\n        var msg = av.i18n.t('Loading Model for Change Visualization');\n        this.diff.progressCallback(percent, msg);\n\n        this._lastDiffLoadPercent = percent;\n      }\n    } }, { key: \"_updateDiffLoadProgress\", value: function _updateDiffLoadProgress()\n\n    {var _this14 = this;\n      // Do nothing if we are not waiting for a diff\n      if (!this.diffNeedsUpdate || !this.diff.enabled || this.diff.empty || !this.diff.progressCallback) {\n        return;\n      }\n\n      // get array of all models\n      var diffModels = this.getModels(this.diff.diffBubbles);\n      var primModels = this.getModels(this.diff.primaryBubbles);\n      var allModels = diffModels.concat(primModels);\n\n      // for 2d, also consider support models\n      var supportModels = this._getDiffSupportModels();\n      if (supportModels) {\n        allModels.push(\n        supportModels.diff,\n        supportModels.primary);\n\n      }\n\n      // check how many models roots need to be loaded\n      var loadedModels = allModels.filter(Boolean).length;\n\n      // Reserve the first 10% progress bar for loading model roots\n      var ModelRootPercent = 10;\n\n      // As long as not all roots are loaded, just track model-root loading\n      if (loadedModels < allModels.length) {\n        var _percent = Math.floor(ModelRootPercent * loadedModels / allModels.length);\n        this._signalDiffLoadProgress(_percent);\n        return;\n      }\n\n      // For 2D diff, we track the model-load progress including geometry\n      // This can be changed as soon as we eliminate geom loading from 2d too.\n      if (!this.is3D) {\n        // sum up progress percent of all models we need\n        var countPercentDone = function countPercentDone(acc, model) {return acc + (_this14.loadersInProgress[model.id] | 0);};\n        var geomPercentDone = allModels.reduce(countPercentDone, 0);\n        var geomPercentTotal = allModels.length * 100;\n\n        // map average loader percent to the upper 90%, because we had reserved some percentage\n        // for the model root loading already.\n        var _percent2 = ModelRootPercent + Math.floor((100 - ModelRootPercent) * geomPercentDone / geomPercentTotal);\n        this._signalDiffLoadProgress(_percent2);\n\n        return;\n      }\n\n      // Track fragment list loading\n      var countLoadedFrags = function countLoadedFrags(acc, model) {return acc + model.getData().fragsLoadedNoGeom;};\n      var countFragsTotal = function countFragsTotal(acc, model) {return acc + model.getData().metadata.stats.num_fragments;};\n      var fragsLoaded = allModels.reduce(countLoadedFrags, 0);\n      var fragsTotal = allModels.reduce(countFragsTotal, 0);\n\n      var percent = ModelRootPercent + Math.floor((100 - ModelRootPercent) * fragsLoaded / fragsTotal);\n      this._signalDiffLoadProgress(percent);\n    } }, { key: \"_updateDiff\", value: function _updateDiff()\n\n    {\n\n      if (!this.diffNeedsUpdate) {\n        return;\n      }\n\n      this._updateGhosting();\n\n      this._updateDiffLoadProgress();\n\n      if (!this.diff.enabled) {\n        // Unload extension if needed on DiffMode disabling\n        this._unloadDiffTool();\n        this._updateAllModelTheming(); // reactive modelTheming\n        return;\n      }\n\n      // collect all models participating in the diff\n      var diffModels = this.getModels(this.diff.diffBubbles);\n      var primModels = this.getModels(this.diff.primaryBubbles);\n      for (var i = 0; i < diffModels.length; i++) {\n        var diffModel = diffModels[i];\n        var primModel = primModels[i];\n\n        // If loading is in progress, modelA or modelB might just be a boolean value\n        var diffModelLoaded = diffModel instanceof av.Model && (diffModel.isOTG() || diffModel.isLoadDone());\n        var primModelLoaded = primModel instanceof av.Model && (primModel.isOTG() || primModel.isLoadDone());\n        if (!diffModelLoaded || !primModelLoaded) {\n          // We cannot start diff until all models are loaded (for 2D, we also need geometry)\n          return;\n        }\n\n        // Make sure that the property db is loaded. Otherwise, we will retry on next\n        // MODEL_ROOT_LOADED event.\n        if (!diffModel.getPropertyDb() || !primModel.getPropertyDb()) {\n          return;\n        }\n      }\n\n      // If we need support models (for 2D diff), make sure that these are reday too\n      var supportModels = undefined;\n      var supportModelsNeeded = !!this.diff.supportBubbles;\n      if (supportModelsNeeded) {\n\n        if (!this._diffSupportModelsReady()) {\n          // We cannot start diff before support models (incl. geometry)\n          // are fully available. So stop here and wait until called again by\n          // next geometry-loaded event.\n          return;\n        }\n        supportModels = this._getDiffSupportModels();\n      }\n\n      var elapsed = performance.now() - this.diffStartTime;\n      console.log('Time for loading diff models: ', elapsed);\n\n      // Make sure that all model-theming is reverted before activating DiffToolExtension\n      this._updateAllModelTheming();\n\n      this._setDiffModels(diffModels, primModels, supportModels);\n    } }, { key: \"_setDiffModels\", value: function _setDiffModels(\n\n    diffModels, primaryModels, supportModels) {var _this15 = this;\n\n      // don't reset diff again until next setModels() call\n      this.diffNeedsUpdate = false;\n\n      // If we are in DiffMode, but no model version changed, we just show\n      // all in ghosted and are done.\n      if (!primaryModels.length) {\n        this._unloadDiffTool();\n        return;\n      }\n\n      var ext = this.viewer.getExtension(ExtNames.DiffTool);\n      if (ext) {\n        ext.replaceModels(diffModels, primaryModels, supportModels);\n      } else {\n\n        var cfg = {\n          diffModels: diffModels,\n          primaryModels: primaryModels,\n          supportModels: supportModels, // = { primary: av.Model, diff: av.Model }\n          diffadp: false,\n          availableDiffModes: ['overlay', 'sidebyside'],\n          diffMode: 'overlay',\n\n          versionA: this.diff.primaryBubbleLabel,\n          versionB: this.diff.diffBubbleLabel,\n          refNames: this.diff.refNames,\n          mimeType: 'application/vnd.autodesk.revit', // change to \"C4R or Revit\"\n          hotReload: true,\n          diffCache: this.diffCache,\n\n          // To run with OTG, we need to use the new code path for side-by-side that uses a single viewer instance.\n          useSplitScreenExtension: true,\n\n          // Add a section with details, such as which versions are compared.\n          // If activated, the overlay displaying the version labels is not\n          // rendered as that information is already contained in the panel.\n          // This option is disabled by default for backwards compatibility.\n          showDetailsSection: true,\n\n          progress: function progress(percent, state) {\n\n            // Diff progress might be null if diffConfig has changed already. This may happen when clicking ('Exit Changes')\n            // while waiting for the diff.\n            if (!_this15.diff.progressCallback) {\n              return;\n            }\n\n            if (state === Autodesk.DiffTool.DIFFTOOL_PROGRESS_STATES.LoadingPropDb) {\n              _this15.diff.progressCallback(percent, av.i18n.t('Loading element properties'));\n              return;\n            }\n\n            if (percent === 100 && _this15.onDiffDone) {\n              _this15.onDiffDone();\n            }\n            _this15.diff.progressCallback(percent, av.i18n.t('Computing change visualization'));\n          },\n          // Exclude objects based on selected level\n          excludeFromDiff: function excludeFromDiff(model, dbId) {\n            return _this15.levelsExtension && !_this15.levelsExtension.floorSelector.isVisible(model, dbId);\n          },\n          // Whenever the DiffTools sets dbIds to visible for a model,\n          // we rerun the current FloorSelectionFilter to make sure that\n          // an object is only shown if both - FloorSelectionFilter and\n          // DiffTool allow it.\n          setNodesOff: function setNodesOff(model) {\n            var levelExt = _this15.levelsExtension;\n            if (levelExt) {\n              levelExt.floorSelector._floorSelectorFilter.reApplyFilter(model);\n            }\n          },\n          hideModeSwitchButton: true };\n\n\n        this._loadExtension(ExtNames.DiffTool, cfg).catch(function (err) {return _this15._onError(err);});\n      }\n    }\n\n    // Make sure that modelTheming colors are applied/cleared according to current modelTheming state\n  }, { key: \"_updateModelTheming\", value: function _updateModelTheming(model) {\n      var key = makeKey(model);\n      var state = this.modelThemingStates[key];\n\n      // If there is no state, the model was not affected by modelTheming and leave theming as it is\n      if (!state) {\n        return;\n      }\n\n      // Suppress all diff as long as diff is active\n      var diffExt = this.viewer.getExtension(ExtNames.DiffTool);\n      var enableTheming = !diffExt;\n      state.setEnabled(model, enableTheming);\n\n      // make sure that theming is applied if enabled\n      state.update(model);\n\n      this.viewer.impl.invalidate(true);\n    } }, { key: \"_updateAllModelTheming\", value: function _updateAllModelTheming()\n\n    {\n      for (var key in this.modelItems) {\n        var model = this.getModel(key);\n        model && this._updateModelTheming(model);\n      }\n    } }, { key: \"getAlignmentService\", value: function () {var _getAlignmentService = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee6() {return regeneratorRuntime.wrap(function _callee6$(_context6) {while (1) {switch (_context6.prev = _context6.next) {case 0:if (!\n\n\n\n                this.alignmentService) {_context6.next = 2;break;}return _context6.abrupt(\"return\",\n                this.alignmentService);case 2:if (!\n\n\n\n\n                this._alignmentServicePromise) {_context6.next = 7;break;}_context6.next = 5;return (\n                  this._alignmentServicePromise);case 5:_context6.next = 11;break;case 7:\n\n                // Init alignment service at first use\n                this._alignmentServicePromise = this._initAlignmentService();_context6.next = 10;return (\n                  this._alignmentServicePromise);case 10:\n                this._alignmentServicePromise = null;case 11:return _context6.abrupt(\"return\",\n\n\n                this.alignmentService);case 12:case \"end\":return _context6.stop();}}}, _callee6, this);}));function getAlignmentService() {return _getAlignmentService.apply(this, arguments);}return getAlignmentService;}()\n\n\n    // Check if we have to care for alignment services.\n  }, { key: \"isUsingAlignmentService\", value: function isUsingAlignmentService() {\n      // Note that alignmentService may also be specified in the options,\n      // but the createAlignmentService() call might not be finished yet.\n      return this.options.createModelAlignmentService || this.alignmentService;\n    } }, { key: \"_initAlignmentService\", value: function () {var _initAlignmentService2 = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee8() {var _this16 = this;var createService, initService;return regeneratorRuntime.wrap(function _callee8$(_context8) {while (1) {switch (_context8.prev = _context8.next) {case 0:\n\n\n                // Stop here if service is not needed\n                createService = this.options.createModelAlignmentService;if (\n                createService) {_context8.next = 3;break;}return _context8.abrupt(\"return\");case 3:\n\n\n\n                // Set alignmentService when ready.\n                initService = /*#__PURE__*/function () {var _ref4 = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee7() {var service;return regeneratorRuntime.wrap(function _callee7$(_context7) {while (1) {switch (_context7.prev = _context7.next) {case 0:_context7.next = 2;return (\n                              createService());case 2:service = _context7.sent;\n                            _this16.setAlignmentService(service);case 4:case \"end\":return _context7.stop();}}}, _callee7);}));return function initService() {return _ref4.apply(this, arguments);};}();\n\n\n                // Load AlignmentService extension\n                _context8.next = 6;return this.viewer.loadExtension('Autodesk.ModelAlignmentService').then(initService);case 6:case \"end\":return _context8.stop();}}}, _callee8, this);}));function _initAlignmentService() {return _initAlignmentService2.apply(this, arguments);}return _initAlignmentService;}() }, { key: \"_getTransformForNode\",\n\n\n    // Use alignment service to load a transform matrix for a given node.\n    value: function () {var _getTransformForNode2 = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee9(bubbleNode) {var alignmentService, versionUrn, viewableName, matrix;return regeneratorRuntime.wrap(function _callee9$(_context9) {while (1) {switch (_context9.prev = _context9.next) {case 0:_context9.next = 2;return (\n                  this.getAlignmentService());case 2:alignmentService = _context9.sent;if (\n\n                alignmentService) {_context9.next = 5;break;}return _context9.abrupt(\"return\");case 5:_context9.next = 7;return (\n\n\n\n\n                  Promise.all(this.pendingAlignmentFetches));case 7:\n\n                // get base64-encoded versionUrn\n                versionUrn = bubbleNode.getRootNode().urn();\n                viewableName = bubbleNode.is2D() ? av.toUrlSafeBase64(bubbleNode.name()) : undefined;\n\n                // get override transform (may be null)\n                _context9.next = 11;return alignmentService.loadTransform(versionUrn, viewableName);case 11:matrix = _context9.sent;return _context9.abrupt(\"return\",\n\n                matrix);case 13:case \"end\":return _context9.stop();}}}, _callee9, this);}));function _getTransformForNode(_x7) {return _getTransformForNode2.apply(this, arguments);}return _getTransformForNode;}()\n\n\n    // If an alignment service is set and specifies a transform for this model,\n    // the loadOptions are modified to replace refPointTransform by the alignment matrix specified by the service. \n    //  @param {BubbleNode}  bubbleNode  - documentNode to be loaded\n    //  @param {loadOptions} loadOptions - modified in-place if an override alignment transform is specified\n  }, { key: \"_applyAlignmentService\", value: function () {var _applyAlignmentService2 = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee10(bubbleNode, loadOptions) {var matrix;return regeneratorRuntime.wrap(function _callee10$(_context10) {while (1) {switch (_context10.prev = _context10.next) {case 0:_context10.next = 2;return (\n\n                  this._getTransformForNode(bubbleNode));case 2:matrix = _context10.sent;\n\n                // If there is an override transform... \n                if (matrix) {\n                  // use this transform instead of the source-file's refPointTransform\n                  loadOptions.applyRefPoint = false;\n                  loadOptions.placementTransform = matrix;\n\n                  // Important if the client uses unit scaling (otherwise it has no effect):\n                  //\n                  // If unitScaling is used, LMV treats refPointTransforms and loadOptions.placemenTransform differently by default:\n                  //  - For refPointTransforms, the application order is:             1. refPointTransform, 2. unitScaling\n                  //  - For loadOptions.placementTransform, the application order is: 1. scaling,           2. placementTransform\n                  //\n                  // In our case, the alignmentTransform is supposed to replace the refPointTransform. So, it needs to be applied _before_ the scaling,\n                  // so that it would be handled in the same way as the refPointTransform would be. This is achieved by this flag,\n                  // which flips the application order of placementTransform and unit scaling.\n                  loadOptions.applyPlacementInModelUnits = true;\n                }case 4:case \"end\":return _context10.stop();}}}, _callee10, this);}));function _applyAlignmentService(_x8, _x9) {return _applyAlignmentService2.apply(this, arguments);}return _applyAlignmentService;}() }], [{ key: \"findDiffSupportModel\", value: function findDiffSupportModel(sheetNode) {// Support model is needed only for 2D sheet nodes.\n      if (!sheetNode.is2D()) {return null;} // get phase name (or first one if there are actually multiple ones)\n      var phases = sheetNode.data.phaseNames;var phase = Array.isArray(phases) ? phases[0] : phases;if (!phase) {console.warn(\"A sheet node must have a phase name. Missing for sheet: \".concat(sheetNode.name));return null;}return sheetNode.getMasterView(phase);} // find corresponding 3D model for each diff/primary\n  }, { key: \"findDiffSupportModels\", value: function findDiffSupportModels(diffConfig) {// Note that 2D diff is never aggregated.\n      diffConfig.supportBubbles.diff = AggregatedView.findDiffSupportModel(diffConfig.diffBubbles[0]);diffConfig.supportBubbles.primary = AggregatedView.findDiffSupportModel(diffConfig.primaryBubbles[0]);} }]);return AggregatedView;}();AggregatedView.ExtNames = ExtNames;\nAggregatedView.AlignmentServices = AlignmentServices;","'use strict';function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}\nimport { GlobalManagerMixin } from \"./GlobalManagerMixin\";\n\nvar isVectorFinite = function isVectorFinite(vec) {\n  return isFinite(vec.x) && isFinite(vec.y) && isFinite(vec.z);\n};\n\nvar isCameraValid = function isCameraValid(camera) {\n  var isOrthoScaleValid = camera.isPerspective || isFinite(camera.orthoScale);\n\n  return (\n    isVectorFinite(camera.position) &&\n    isVectorFinite(camera.target) &&\n    isVectorFinite(camera.up) &&\n    isOrthoScaleValid);\n\n};\n\n// Simple cache object that's being used only if useLocalStorage is false.\nvar CacheHelper = /*#__PURE__*/function () {\n  function CacheHelper() {_classCallCheck(this, CacheHelper);\n    this.cacheObj = {};\n  }_createClass(CacheHelper, [{ key: \"setItem\", value: function setItem(\n\n    key, camJson) {\n      this.cacheObj[key] = camJson;\n    } }, { key: \"getItem\", value: function getItem(\n\n    key) {\n      return this.cacheObj[key];\n    } }]);return CacheHelper;}();\n\n\n// Used to persist camera in local browser storage.\n// Note: We have to use the abbreviated class name here - otherwise the Checkmarx tool get confused and considers the class as unsafe.\nexport var CameraLS = /*#__PURE__*/function () {\n\n  // @param {aggregatedView} aggregatedView\n  function CameraLS(aggregatedView) {var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : { useLocalStorage: true };_classCallCheck(this, CameraLS);\n    this.aggregatedView = aggregatedView;\n    this.options = options;\n    this.key = undefined;\n\n    if (this.options.useLocalStorage) {\n      this.cache = Autodesk.Viewing.Private.LocalStorage;\n    } else {\n      this.cache = new CacheHelper();\n    }\n\n    this.unloadCb = this.saveCamera.bind(this);\n    this.addWindowEventListener('beforeunload', this.unloadCb);\n  }_createClass(CameraLS, [{ key: \"destroy\", value: function destroy()\n\n    {\n      this.unsetKey();\n      this.removeWindowEventListener('beforeunload', this.unloadCb);\n    }\n\n    // @param {URL string} key\n    // Used to set the key to be able to call the 'unloadCb' which is called e.g. on on closing some tab or window\n  }, { key: \"setKey\", value: function setKey(key) {\n      this.key = key;\n    } }, { key: \"unsetKey\", value: function unsetKey()\n\n    {\n      this.key = undefined;\n    } }, { key: \"saveCamera\", value: function saveCamera()\n\n    {\n      // If camera wasn't initialized, don't save\n      if (!this.aggregatedView.cameraInitialized || !this.key) {\n        return;\n      }\n\n      // If camera was initialized, but contains problematic values, don't save\n      var camera = this.aggregatedView.viewer.impl.camera;\n      var camValid = isCameraValid(camera);\n      if (!camValid) {\n        return;\n      }\n\n      var startBimWalk = this.aggregatedView.isBimWalkActive();\n      var offset = this.aggregatedView.is3D ? this.aggregatedView.globalOffset : undefined;\n      this.saveStartCamera(this.key, this.aggregatedView.viewer.impl.camera, startBimWalk, offset);\n    }\n\n    // Save current camera to local storage\n    // Pass an undefined camera to clear the cache for this key\n  }, { key: \"saveStartCamera\", value: function saveStartCamera(key, camera, startBimWalk, offset) {\n      var camJson = JSON.stringify({\n        offset: offset,\n        position: camera.position,\n        target: camera.target,\n        up: camera.up,\n        orthoScale: camera.orthoScale,\n        isPerspective: camera.isPerspective,\n        fov: camera.fov,\n        startBimWalk: startBimWalk });\n\n\n      this.cache.setItem(key, camJson);\n    }\n\n    // Clears the camera from a specific key\n  }, { key: \"clearItem\", value: function clearItem(key) {\n      this.cache.setItem(key);\n    } }, { key: \"loadCamera\", value: function loadCamera()\n\n    {\n      if (!this.key) {\n        return false;\n      }\n\n      var camData = undefined;\n\n      // it's not about usage of LocalStorage but about parsing...\n      try {\n        var camJson = this.cache.getItem(this.key);\n        camData = JSON.parse(camJson);\n      }\n      catch (err) {\n        // It's not really critical if we don't find usable content in localStorage.\n        // Just don't load in this case, so that the defaultCamera of a model is used.\n      }\n\n      // Avoid exception if any required value is missing\n      if (!camData || !camData.position || !camData.target || !camData.up) {\n        return false;\n      }\n\n      var makeVec3 = function makeVec3(v) {\n        return new THREE.Vector3(parseFloat(v.x), parseFloat(v.y), parseFloat(v.z));\n      };\n\n      // Convert camera vectors to THREE.Vector3, which is required to use it in LMV\n      var camera = {\n        position: makeVec3(camData.position),\n        target: makeVec3(camData.target),\n        up: makeVec3(camData.up),\n        isPerspective: Boolean(camData.isPerspective),\n        fov: parseFloat(camData.fov) };\n\n\n      if (camData.orthoScale) {\n        camera.orthoScale = parseFloat(camData.orthoScale);\n      }\n\n      if (!isCameraValid(camera)) {\n        return false;\n      }\n\n      // Get offset and apply it (only for 3D views)\n      var offset = camData.offset ? makeVec3(camData.offset) : undefined;\n      if (offset) {\n\n        // Undefined would be okay (2D), but if the offset exists, it must be a valid one => Reject otherwise\n        if (!isVectorFinite(offset)) {\n          return;\n        }\n\n        // Convert camera to global coords, i.e., independent of current globalOffset state of the viewer\n        camera.position.add(offset);\n        camera.target.add(offset);\n      }\n\n      this.aggregatedView.setCameraGlobal(camera);\n\n      // Trigger BimWalk start if specfied. E.g. after DropMe or if we used BimWalk when we left it.\n      if (camData.startBimWalk) {\n        this.aggregatedView.startBimWalk();\n      }\n    } }]);return CameraLS;}();\n\n\nGlobalManagerMixin.call(CameraLS.prototype);","\n\nimport { BubbleNode } from \"./bubble\";\nimport { ErrorCodes, getErrorCode } from \"../file-loaders/net/ErrorCodes\";\nimport { endpoint, isOffline, getOfflineResourcePrefix, getEnv, setEnv } from \"../file-loaders/net/endpoints\";\nimport { ViewingService } from \"../file-loaders/net/Xhr\";\nimport { isMobileDevice, getGlobal } from \"../compat\";\nimport { logger } from \"../logger/Logger\";\nimport { EnvironmentConfigurations, refreshRequestHeader, token } from \"../envinit\";\nimport { getParameterByName } from \"../globals\";\n\n\nvar global = getGlobal();\nvar _window = global;\n\n/**\n                       * Allows the client to load the model data from the cloud, it\n                       * gives access to the root and provides a method for finding elements\n                       * by id.\n                       *\n                       * Typically, you load the document from Forge, parse it for\n                       * the required content (for example, 3d geometries), then pass this on to\n                       * the viewer to display.  You can also get some information about the document,\n                       * such as the number of views it contains and its thumbnail image.\n                       * \n                       * @see {Autodesk.Viewing.BubbleNode}\n                       *\n                       * @class\n                       * @memberof Autodesk.Viewing\n                       * @alias Autodesk.Viewing.Document\n                       * @param {object} dataJSON - JSON data representing the document.\n                       * @param {string} path - Path/URL where dataJSON was fetched from.\n                       * @param {string} [acmsession=undefined] - ACM session ID.\n                       */\nexport function Document(dataJSON, path, acmsession)\n{\n  this.myPath = path;\n  this.myData = dataJSON;\n\n  if (dataJSON) {\n    this.docRoot = new BubbleNode(dataJSON);\n    this.docRoot.setDocument(this);\n  }\n\n  this.myNumViews = {};\n  this.acmSessionId = acmsession;\n\n  // Search bubble for type=\"view\" role=\"3d\" children of type=\"geometry\" role=\"3d\" items.\n  // Add count of view-3d items to parent geometry-3d items.\n  // Collect geometry items of camera view items referenced by guid.\n  //\n  var self = this;\n\n  this.docRoot.traverse(function (node) {\n    if (node.isViewPreset()) {\n      var geometryItem = node.findParentGeom2Dor3D();\n      var viewCount = self.myNumViews[geometryItem.guid()] || 0;\n      self.myNumViews[geometryItem.guid()] = viewCount + 1;\n    }\n  });\n\n  //This check should probably happen before we traverse the manifest to look\n  //for views. However, for this to happen, all the unit tests that use fragments of\n  //manifests (which are not valid by themselves) need to be rewritten to work using valid\n  //manifests as test data.\n  var viewables = this.docRoot.findAllViewables();\n  if (viewables.length === 0) {\n    logger.error(\"Document contains no viewables.\");\n  }\n}\n\n/**\n   * Invoked after fetching a JSON manifest from Forge.\n   * \n   * @callback Autodesk.Viewing.Document~loadSuccessCallback\n   * @param {Autodesk.Viewing.Document} doc - Instance that wraps the Forge JSON response.\n   */\n\n/**\n       * Invoked after failing to fetch a JSON manifest from Forge.\n       * @callback Autodesk.Viewing.Document~loadErrorCallback\n       * @param {number} errorCode - A numerical error code.\n       * @param {string} errorMessage - A localized error message.\n       */\n\n/**\n           * Static method to load the translation's manifest data from a Forge endpoint.\n           * \n           * @example\n           *   Autodesk.Viewing.Document.load( \n           *      MY_URN, \n           *      function onSuccessCallback(doc){\n           *          var bubbleRoot = doc.getRoot();\n           *          console.log(bubbleRoot);\n           *          // proceed to load a viewable into the Viewer...\n           *      },\n           *      function onErrorCallback(errCode, errMsg){\n           *          console.error('Failed to load manifest [' + errCode + '] ' + errMsg);\n           *      }\n           *   )\n           *\n           * @param {string} documentId - The URN of the file.\n           * @param {Autodesk.Viewing.Document~loadSuccessCallback} onSuccessCallback - A function that is called when load succeeds.\n           * @param {Autodesk.Viewing.Document~loadErrorCallback} onErrorCallback - A function that is called when load fails.\n           * @x-param {object} [accessControlProperties] - An optional list of key value pairs as access control properties,\n           * which includes a list of access control header name and values, and an OAuth 2.0 access token.\n           * \n           * @see {Autodesk.Viewing.BubbleNode}\n           * @see {Autodesk.Viewing.Viewer3D}\n           * @static\n           * @alias Autodesk.Viewing.Document.load\n           */\nDocument.load = function (documentId, onSuccessCallback, onErrorCallback, accessControlProperties)\n{\n  var documentPath = Document.getDocumentPath(documentId);\n  var acmsession; //set by doLoad below\n  var messages;\n\n  function urnMatches(patterns) {\n    var urn = documentId.split(':');\n    urn = urn[1];\n    var decodedUrn = Autodesk.Viewing.fromUrlSafeBase64(urn);\n\n    for (var i = 0; i < patterns.length; i++) {\n      if (decodedUrn.indexOf(patterns[i]) > -1) {\n        return true;\n      }\n    }\n    return false;\n  }\n\n  var euPatterns = ['urn:adsk.wipemea', 'urn:adsk.wipbimemea'];\n  if (documentId.startsWith('urn') && urnMatches(euPatterns)) {\n    var api = endpoint.getApiFlavor();\n    var env = getEnv();\n    var isDSv2 = api === endpoint.ENDPOINT_API_DERIVATIVE_SERVICE_V2 && !env.endsWith('EU');\n    var isD3S = env.endsWith('US') && api === endpoint.ENDPOINT_API_D3S;\n    api += '_EU';\n    if (isDSv2) {\n      endpoint.setEndpointAndApi(null, api);\n    } else if (isD3S) {\n      env = env.replace(\"US\", \"EU\");\n      setEnv(env);\n      var config = EnvironmentConfigurations[env];\n      endpoint.setEndpointAndApi(config['ROOT'], api);\n    }\n  }\n\n  function onSuccess(data) {\n\n    if (endpoint.isSVF2Backend() || endpoint.isOtgBackend()) {\n      //Fluent endpoint uses the original manifest URN as acm session, so we expand the\n      //acmsession query parameter with the added fluent server piece.\n      //This is because some manifests are \"shallow copies\" of other\n      //manifests, and the URN is used to auhtorize access to the storage context\n      //of the source data. Setting an acmsession for Fluent data is\n      //only needed in case of shallow copy urns.\n      if (acmsession)\n      acmsession = data.urn + \",\" + acmsession;else\n\n      acmsession = data.urn;\n    }\n\n    var lmvDocument = new Document(data, documentPath, acmsession);\n\n    //TODO: avoid using this function to detect if there are viewables, the Document\n    //should have already traversed the bubble and know the number of geom nodes\n    var viewableCount = lmvDocument.getRoot().search({ 'type': 'geometry' }).length;\n\n    // Check if there are any viewables.\n    if (viewableCount > 0) {\n      messages = lmvDocument.getGlobalMessages();\n      if (onSuccessCallback) {\n        onSuccessCallback(lmvDocument, messages);\n      }\n    } else\n    {\n      // If there are no viewables, report an error.\n      //\n      if (onErrorCallback) {\n        messages = lmvDocument.getGlobalMessages();\n        var errorCode = ErrorCodes.BAD_DATA_NO_VIEWABLE_CONTENT;\n        var errorMsg = \"No viewable content\";\n        onErrorCallback(errorCode, errorMsg, messages);\n      }\n    }\n  }\n\n  function onFailure(statusCode, statusText, data) {\n\n    // If unauthorized and the first call for loading, will suppose third-party\n    // cookies are disabled, and load again with token in request header.\n    if (statusCode === 401 && global.LMV_THIRD_PARTY_COOKIE === undefined) {\n      global.LMV_THIRD_PARTY_COOKIE = false;\n      refreshRequestHeader(token.accessToken);\n      doLoad();\n    } else\n    {\n      if (onErrorCallback) {\n        var errorMsg = \"Error: \" + statusCode + \" (\" + statusText + \")\";\n        var errorCode = getErrorCode(statusCode);\n        onErrorCallback(errorCode, errorMsg, statusCode, statusText, data);\n      }\n    }\n  }\n\n  function doLoad() {\n\n    //If no explicit scopes are given, we can skip the acmession request,\n    //because the OTG server knows how to add the simple acm headers automatically.\n    //This saves a half second from the initial blank screen when loading a model.\n    var canSkipAcmSession = !accessControlProperties || (endpoint.isSVF2Backend() || endpoint.isOtgBackend()) && !accessControlProperties[\"x-ads-acm-scopes\"];\n    if (!acmsession && !canSkipAcmSession) {\n\n      if (!accessControlProperties.oauth2AccessToken)\n      accessControlProperties.oauth2AccessToken = token.accessToken;\n\n      ViewingService.getACMSession(endpoint.getApiEndpoint(), accessControlProperties, function (in_acmsession) {\n        acmsession = in_acmsession;\n        var msg = {\n          queryParams: acmsession ? \"acmsession=\" + acmsession : \"\" };\n\n        endpoint.setAcmSession(acmsession);\n        ViewingService.getManifest(endpoint.initLoadContext(msg), documentPath, onSuccess, onFailure);\n      }, onErrorCallback);\n    } else {\n      ViewingService.getManifest(endpoint.initLoadContext(), documentPath, onSuccess, onFailure);\n    }\n  }\n\n  doLoad();\n};\n\n/**\n    * @private\n    */\nDocument.getDocumentPath = function (urn)\n{\n  // Handle local paths explicitly.\n  //\n  if (urn.indexOf('urn:') === -1) {\n\n    //Absolute URL\n    if (urn.indexOf(\"://\") !== -1)\n    return urn;\n\n    var relativePath = urn;\n\n    if (typeof window !== \"undefined\") {\n      if (relativePath.indexOf('/') !== 0)\n      relativePath = '/' + relativePath;\n      return _window.location.protocol + \"//\" + _window.location.host + relativePath;\n    } else {\n      return relativePath;\n    }\n  }\n  return urn;\n};\n\n/**\n    * This function is only used when Authorization is through Bearer token; aka when cookies are disabled.\n    * @param {string} data - See {@link Autodesk.Viewing.Document#getThumbnailOptions}.\n    * @param {function} onComplete - Node style callback function `callback(err, response)`.\n    */\nDocument.requestThumbnailWithSecurity = function (data, onComplete) {\n\n  var onSuccess = function onSuccess(response) {\n    onComplete(null, response);\n  };\n  var onFailure = function onFailure() {\n    onComplete('error', null);\n  };\n\n  var options = {\n    responseType: 'blob',\n    skipAssetCallback: true,\n    size: data.width, //Ignore the height, they are the same.\n    guid: data.guid,\n    acmsession: data.acmsession };\n\n\n  var urlpath = \"urn:\" + data.urn; //HACK: Adding urn: makes the ViewingServiceXhr accept this as a viewing service request.\n\n  var endpointUrl = undefined;\n\n  if (!BUILD_FLAG__USE_OTG_DS_PROXY) {\n    var envName = getEnv();\n    endpointUrl = EnvironmentConfigurations[envName].UPSTREAM;\n    options.apiData = EnvironmentConfigurations[envName].UPSTREAM_API_DATA;\n  }\n\n  ViewingService.getThumbnail(endpoint.initLoadContext({ endpoint: endpointUrl }), urlpath, onSuccess, onFailure, options);\n};\n\n\nDocument.prototype.getAcmSessionId = function (urn) {\n  return Document.getAcmSessionId(urn, this.acmSessionId);\n};\n\n/**\n   * @static\n    */\nDocument.getAcmSessionId = function (urn, acmSessionId) {\n\n  if (!urn) {\n    return \"\";\n  }\n\n  var isFluentUrn = urn.indexOf(\"urn:adsk.fluent\") >= 0;\n  //It's a DS resource URN (not OTG URN) -- acmSession is different depending\n  //on whether we request through the DS directly or via OTG proxy.\n  if (!BUILD_FLAG__USE_OTG_DS_PROXY && !isFluentUrn && (endpoint.isSVF2Backend() || endpoint.isOtgBackend())) {\n    //See also how the acmSession is constructed above in Document.load().\n    //This extracts the DS part of the acmsession from the combined OTG+DS acmsession.\n    return acmSessionId.split(\",\")[1] || \"\";\n  } else {\n    return acmSessionId;\n  }\n};\n\n/**\n    * Returns the full path to the given URN.\n    * \n    * @param {string} urn - URN of the document.\n    * @returns {string}\n    */\nDocument.prototype.getFullPath = function (urn)\n{\n\n  if (!urn)\n  return urn;\n\n  var fullPath = urn;\n\n  if (isOffline()) {\n    // If offline resource prefix is already added to path, then no need to add again.\n    if (fullPath.indexOf(getOfflineResourcePrefix()) == -1) {\n      fullPath = decodeURIComponent(getOfflineResourcePrefix()) + fullPath.substr(fullPath.indexOf('/'));\n    }\n  } else if (urn.indexOf('urn') === 0) {\n\n    var isFluentUrn = urn.indexOf(\"urn:adsk.fluent\") === 0;\n    //It's a DS resource URN (not OTG URN) but we are requesting it through\n    //the OTG caching proxy, we have to construct the path explicitly\n    if (!isFluentUrn && (endpoint.isSVF2Backend() || endpoint.isOtgBackend())) {\n\n      //If LMV is configured with the Fluent endpoint by default,\n      //we have to explicitly initialize a DS /items API URL instead of relying on the\n      //built in logic.\n\n      //Two options here --\n      //(1) we can use the fluent OTG server as caching proxy for Derivative Service or\n      //(2) we can redirect to Derivative Service itself.\n      //The only reason to support option 2 is because we are seeing very slow access times\n      //from China and we don't want to regress performance there. For Design Collaboration, we\n      //stick to option (1), for Docs and Forge we use the redirection.\n      if (BUILD_FLAG__USE_OTG_DS_PROXY) {\n        fullPath = endpoint.getItemApi(null, urn, 'derivativeV2');\n      } else {\n        var envName = getEnv();\n        var envConfig = EnvironmentConfigurations[envName];\n        fullPath = endpoint.getItemApi(envConfig.UPSTREAM, urn, envConfig.UPSTREAM_API_DATA);\n      }\n    } else {\n      fullPath = endpoint.getItemApi(null, urn);\n      // The getItemApi encodes the derivative urn for the modelDerivativeV2 API.\n      // Xhr.js will do a second encoding which will make the url invalid.\n      // Thus, we are decoding the fullPath only for the modelDerivativeV2 endpoint\n      if (endpoint.ENDPOINT_API_MODEL_DERIVATIVE_V2 === endpoint.getApiFlavor()) {\n        fullPath = decodeURIComponent(fullPath);\n      }\n    }\n  }\n  // Handle local bubble files.\n  //\n  else if (urn.indexOf('$file$') === 0) {\n      fullPath = this.myPath.replace('/bubble.json', '') + urn.replace('$file$', '');\n    }\n  return fullPath;\n};\n\n/**\n    * Returns a plain object with properties used to fetch a thumbnail image.\n    * \n    * @param {object} item\n    * @param {number} [width=200]\n    * @param {number} [height=200]\n    * @returns {object} `{urn: string, width: number, height: number, guid: string, acmsession: (string)}`\n    */\nDocument.prototype.getThumbnailOptions = function (item, width, height) {\n  var requestedWidth = width ? width : 200;\n  var requestedHeight = height ? height : 200;\n  var urn = item.urn || this.myData.urn;\n\n  return {\n    urn: urn,\n    width: requestedWidth,\n    height: requestedHeight,\n    guid: item.guid,\n    acmsession: this.getAcmSessionId(urn) };\n\n};\n\n/**\n    * Returns the path to the thumbnail of the item with the given ID.\n    * @param {string} item - Document item.\n    * @param {int} [width=200] - The requested thumbnail width.\n    * @param {int} [height=200] - The requested thumbnail height.\n    * @returns {string}\n    */\nDocument.prototype.getThumbnailPath = function (item, width, height)\n{\n  var data = this.getThumbnailOptions(item, width, height);\n  var ret = endpoint.getThumbnailApi(null, data.urn) +\n  \"?width=\" + data.width +\n  \"&height=\" + data.height;\n\n  if (data.guid) {\n    ret += \"&guid=\" + data.guid;\n  }\n\n  if (data.acmsession) {\n    ret += \"&acmsession=\" + data.acmsession;\n  }\n\n  // Add window origin as additional param. This avoids a server-side caching problem when switching between different LMV deployments\n  // (e.g. local and staging deploy). Without the domain param, the server caches the request response (which is fine), but also the \n  // 'Access-Control-Allow-Origin' of the response (which isn't). As a consequence, when requesting the same thumbnail from different origins,\n  // the response of the second request is rejected by a cors error:\n  // 'Access to image has been blocked by CORS policy: The 'Access-Control-Allow-Origin' header has a value 'https://local-dcs.b360-staging.autodesk.com' that is not equal to the supplied origin.\n  // Adding the domain param avoids this problem.\n  var domainParam = endpoint.getQueryParams();\n  if (domainParam) {\n    ret += \"&\" + domainParam;\n  }\n\n  return ret;\n};\n\nDocument.prototype.getLeafletZipParams = function (outLoadOptions, geomItem) {\n  var leafletZipItem = geomItem.search({ 'role': 'leaflet-zip' }, false);\n\n  var currentZip;\n  var zipParams;\n\n  for (var i = 0; i < leafletZipItem.length; i++) {\n    zipParams = {};\n    currentZip = leafletZipItem[i]._raw();\n\n    var urn = currentZip.urn;\n\n    zipParams.urnZip = this.getFullPath(urn);\n    zipParams.centralDirOffset = currentZip.central_dir_offset;\n    zipParams.centralDirLength = currentZip.central_dir_length;\n    zipParams.centralDirEntries = currentZip.central_dir_entries;\n    zipParams.zipMaxLevel = currentZip.max_level - outLoadOptions.levelOffset;\n    zipParams.loadFromZip = !!(zipParams.urnZip && zipParams.centralDirOffset && zipParams.centralDirLength && zipParams.centralDirEntries);\n    zipParams.fileTable = {};\n\n    if (!outLoadOptions.zips) {\n      outLoadOptions.zips = [];\n    }\n\n    outLoadOptions.zips.push(zipParams);\n  }\n\n  outLoadOptions.zips.sort(function (a, b) {\n    return a.zipMaxLevel - b.zipMaxLevel;\n  });\n};\n\n/**\n    * Extracts leaflet loader params from an item (if any).\n    * @param {object} outLoadOptions - Extracted params are stored in this object.\n    * @param {BubbleNode} geomItem - Geometry item with role '2d' that contains\n    * the leaflet resource item.\n    * @param {object} leafletItem - The resource item with role 'leaflet' that\n    * contains the tile url pattern and some other params.\n    */\nDocument.prototype.getLeafletParams = function (outLoadOptions, geomItem, leafletItem) {\n\n  outLoadOptions.tileSize = leafletItem.tileSize ? leafletItem.tileSize : 512; // currently, bubbles use a fixed tile size of 512.\n  outLoadOptions.texWidth = leafletItem.resolution[0];\n  outLoadOptions.texHeight = leafletItem.resolution[1];\n  outLoadOptions.paperWidth = leafletItem.paperWidth;\n  outLoadOptions.paperHeight = leafletItem.paperHeight;\n  outLoadOptions.paperUnits = leafletItem.paperUnits;\n  outLoadOptions.urlPattern = leafletItem.urn;\n  outLoadOptions.mime = leafletItem.mime;\n  outLoadOptions.isLeaflet = true;\n\n  // For standard leaflet hierarchies, the root level 0 is the only one with only one tile,\n  // i.e., there are already 2-4 tiles at level 1.\n  // In contrast, the hierarchies produced by cloud translation start at a root resolution of 1x1,\n  // thus containing several levels that we have to skip. The number of skipped levels is controlled\n  // by the 'levelOffset' parameter.\n  // The level offset that we need for a hierarchy with a root resolution of 1x1 resolution depends\n  // on the tileSize and is computed by this function,\n  function computeLevelOffset(tileSize) {\n\n    // when reaching this, we abort the loop, because there is something strange\n    // with the tileSize parameter.\n    var MaxCycles = 20;\n\n    var pixelSize = 1;\n    var level = 0;\n    for (var i = 0; i < MaxCycles; i++) {\n      // will the next level still fit into a single tile?\n      pixelSize *= 2;\n\n      // if no, stop here\n      if (pixelSize > tileSize) {\n        return level;\n      }\n      level++;\n    }\n\n    logger.log(\"unexpected leaflet tileSize\");\n    return 0;\n  }\n\n  // hierarchies produced by cloud translation service start with a 1x1 miplevel at the root.\n  // therefore, we have to skip some levels.\n  outLoadOptions.levelOffset = computeLevelOffset(outLoadOptions.tileSize);\n\n  this.getLeafletZipParams(outLoadOptions, geomItem);\n\n  outLoadOptions.loadFromZip = outLoadOptions.zips && outLoadOptions.zips[0].loadFromZip;\n\n  // By default, the number of hierarchy levels is computed automatically from texWidth/texHeight.\n  // (see computeMaxLevel() in ModelIteratorTexQuad.js). However, the leaflet item also\n  // contains a maxLevel value, which is usually smaller than the computed one. The purpose\n  // of this value is to specify the (reduced) number of levels that we use when viewing\n  // the leaflet in offline mode on mobile devices. Otherwise, we let maxLevel undefined, so\n  // that the full resolution is used.\n  if (outLoadOptions.zips && isOffline() && isMobileDevice()) {\n    // maxLevel is stored in another resource item that references a zip-file with the tile-images.\n    // the max_level value includes several levels with just one tile (1x1, 2x2, ...) which we skip.\n\n    // Currently for mobile devices in offline mode, we assume they download only the first zip, \n    // due to data consumption and download time. \n    // If it will change, we don't need to slice the zips array, and need to change zips[0] to zips[zips.length-1].\n\n    // Keep only first zip\n    outLoadOptions.zips = outLoadOptions.zips.slice(0, 1);\n    outLoadOptions.maxLevel = outLoadOptions.zips[0].zipMaxLevel;\n  }\n};\n\n//Magic manual way of getting to the PDF for old URNs that don't have the 1:1 page PDF generated\nDocument.prototype.derivePdfUrnHack = function (bubbleNode, outLoadOptions) {\n\n  //Temporary hack for obtaining the sharding key, until we have a generic way of getting the\n  //sharding key for the intermediate PDF from the manifest\n\n  var allSheets = bubbleNode.parent.children.slice();\n\n  allSheets.sort(function (a, b) {\n    return a._raw().order - b._raw().order;\n  });\n\n  var PDF_BATCH_SIZE = 75;\n  var lastSheet;\n\n  if (allSheets.length <= PDF_BATCH_SIZE) {\n    //Fewer than 75 sheets, the last page will hold the sharding prefix\n    //used by the split PDF worker (because it also processes the last PDF job after splitting)\n    lastSheet = allSheets[allSheets.length - 1];\n  } else {\n    lastSheet = allSheets[74];\n  }\n\n  //Find an F2d node with a URN in the manifest node that has the right sharding prefix\n  var items = lastSheet.search(BubbleNode.GEOMETRY_F2D_NODE);\n  var item = items[0];\n  if (item) {\n    //slice and dice the url\n    var idx = item.urn().indexOf(\"/\");\n    var urnPrefix = item.urn().slice(0, idx);\n\n    var order = bubbleNode._raw().order;\n    var fileName = 0 | order % PDF_BATCH_SIZE;\n    var page = (0 | order / PDF_BATCH_SIZE) + 1;\n    var pdfUrn = urnPrefix + \"/output/\".concat(fileName, \"/\").concat(fileName, \".pdf\");\n\n    outLoadOptions.page = page;\n    outLoadOptions.isPdf = true;\n\n    console.log(\"pdf path\", pdfUrn);\n\n    return pdfUrn;\n  }\n\n  return null;\n};\n\n/**\n    * Returns the relative path to the viewable of the given item.\n    * @param {object} item - The item whose viewable is requested.\n    * @param {object} outLoadOptions - Output param: used to store some additional loader options.\n    * Needed to extract leaflet params from a bubble item.\n    * @returns {string}\n    */\nDocument.prototype.getViewableUrn = function (item, outLoadOptions)\n{\n  // Operate with a bubbleNode\n  var bubbleNode;\n  if (item instanceof BubbleNode) {\n    bubbleNode = item;\n  } else {\n    // Find it\n    var results = this.docRoot.search(item);\n    if (results.length > 0) {\n      bubbleNode = results[0];\n    } else {\n      bubbleNode = new BubbleNode(item);\n    }\n  }\n\n  if (bubbleNode.isGeometry()) {\n    if (bubbleNode.is3D()) {\n      // delegate to BubbleNode, which has OTG support\n      return bubbleNode.getViewableRootPath();\n    } else\n    if (bubbleNode.is2D()) {\n\n      //If the PDF has fewer than some number of image pixels,\n      //use the vector renderer, otherwise use the Leaflet renderer.\n      var USE_VECTOR_CUTOFF_PIXELS = 1 << 20;\n\n      //Get number of pixels while being aware that older manifests do not have this property.\n      var numPixels = bubbleNode.data.totalRasterPixels;\n      if (typeof numPixels !== \"number\")\n      numPixels = Infinity; //NOTE: Not 0, because we want to fall back to raster in this case.\n\n      var useVectorPdf = numPixels < USE_VECTOR_CUTOFF_PIXELS;\n\n      //For the initial testing period, allow overriding the\n      //automatically chosen renderer in either direction.\n      var useVectorPdfOverride =\n      getParameterByName('vectorPdf') === 'true' ||\n      getGlobal().LMV_VECTOR_PDF ||\n      this.myData && this.myData.isVectorPDF ||\n      !!bubbleNode.data.isVectorPDF;\n      var useRasterPdfOverride = getParameterByName(\"vectorPdf\") === \"false\" || getGlobal().LMV_RASTER_PDF;\n      if (useVectorPdfOverride)\n      useVectorPdf = true;else\n      if (useRasterPdfOverride)\n      useVectorPdf = false;\n\n      // check for a leaflet or pdf page resource\n      var itemsPdfPage = bubbleNode.search(BubbleNode.PDF_PAGE_NODE);\n      var itemsLeaflet = bubbleNode.search(BubbleNode.LEAFLET_NODE);\n\n      // Fill outLoadOptions with leaflet params too, in order to support Leaflet overlay on top of the Vector-PDF.\n      if (useVectorPdf && itemsLeaflet.length > 0 && outLoadOptions) {\n        this.getLeafletParams(outLoadOptions, bubbleNode, itemsLeaflet[0]._raw());\n        outLoadOptions.tempRasterPath = itemsLeaflet[0].urn();\n      }\n\n      if (useVectorPdf && itemsPdfPage.length) {\n        if (outLoadOptions) {\n          outLoadOptions.isPdf = true;\n          // Let the bubble node define the page number\n          outLoadOptions.page = itemsPdfPage[0].data.page || 1;\n        }\n        return itemsPdfPage[0].urn();\n      }\n\n\n\n      // found one? => extract its params\n      if (itemsLeaflet.length > 0 && outLoadOptions) {\n\n        //If the manual PDF override is set, also try the old way (to be removed at a later date once\n        //the official way is in production)\n        if (useVectorPdfOverride) {\n          var pdfPath = this.derivePdfUrnHack(bubbleNode, outLoadOptions);\n\n          if (pdfPath) {\n            return pdfPath;\n          }\n        }\n\n        this.getLeafletParams(outLoadOptions, bubbleNode, itemsLeaflet[0]._raw());\n\n        return itemsLeaflet[0].urn();\n      }\n\n      // if there is no leaflet...\n      // check for single image source\n      var itemsImage = bubbleNode.search(BubbleNode.IMAGE_NODE);\n      if (itemsImage.length)\n      return itemsImage[0].urn();\n\n      // Finally fall through to the F2D resource\n      var itemsF2D = bubbleNode.search(BubbleNode.GEOMETRY_F2D_NODE);\n      if (itemsF2D.length)\n      return itemsF2D[0].urn();\n    }\n  } else\n  if (bubbleNode.isViewPreset()) {\n    var geometryItem = this.getViewGeometry(bubbleNode, true);\n    if (geometryItem)\n    return this.getViewableUrn(geometryItem, outLoadOptions);\n  }\n\n  return '';\n};\n\n\n/**\n    * Returns the absolute path to the viewable of the given item, including server endpoint.\n    * @param {object} item - The item whose viewable is requested.\n    * @param {object} outLoadOptions - Output param: used to store some additional loader options.\n    * Needed to extract leaflet params from a bubble item.\n    * @returns {string}\n    */\nDocument.prototype.getViewablePath = function (item, outLoadOptions)\n{\n  var relPath = this.getViewableUrn(item, outLoadOptions);\n\n  if (!relPath)\n  return \"\";\n\n  return this.getFullPath(relPath);\n};\n\n// Revit derivatives contain an urn to an aecModelData json file. If this\n// exists, this function loads that json file and attaches it to a viewable node,\n// so that it can be obtained using BubbleNode.getAecModelData(). onFinished\n// is always called with aecModelData on success, otherwise with undefined. \nDocument.prototype.downloadAecModelData = function (onFinished) {\n\n  //check if it's already available (automatically added to manifest by OTG server)\n  var viewable = this.docRoot.findViewableParent();\n  var aecModelData = viewable && viewable.data.aec_model_data;\n  if (aecModelData) {\n    onFinished && onFinished(aecModelData);\n    return Promise.resolve(aecModelData);\n  }\n\n  // Find node containing aecModelData urn\n  var nodes = this.docRoot.search({ role: 'Autodesk.AEC.ModelData' });\n  var aecNode = nodes[0];\n  if (!aecNode) {\n    onFinished && onFinished();\n    return Promise.resolve(null);\n  }\n\n  // attach sessionId if specified\n  var params = {};\n  if (this.acmSessionId)\n  params.queryParams = 'acmsession=' + this.acmSessionId;\n\n  //In case there is an OTG manifest, we need to get\n  //the AECModelData as an OTG resource, because it will\n  //contain transformed dbIds.\n  var path = aecNode.getViewableRootPath();\n\n  //Construct the absolute path to fetch\n  var absPath = this.getFullPath(path);\n\n  return new Promise(function (resolve) {\n\n    var onDone = function onDone(aec) {\n      // find viewable node that we will attach the data to,\n      // so that BubbleNode.getAecModelData() will find it.\n      var viewableNode = aecNode.findViewableParent();\n      viewableNode.data.aec_model_data = aec;\n      onFinished && onFinished(aec);\n      resolve(aec);\n    };\n\n    ViewingService.getItem(endpoint.initLoadContext(params), absPath,\n    function (success) {return onDone(success);},\n    function () {return onDone();}, //don't really want to cause an exception thrown here\n    { responseType: 'json' });\n\n  });\n};\n\n/**\n    * This is a utility function to support delay loaded AECModelData.\n    * It is a replacement for the synchronous BubbleNode.getAecModelData() for cases\n    * when we may not have yet loaded the AECModelData or we are not sure that we did.\n    * This helper is specifically here in order to hide the fact that the bubbleNode already has\n    * a back pointer to the Document instance.\n    * @param bubbleNode BubbleNode|BubbleNode[] - input manifest node(s) for which we need AECModelData.\n    * @returns Object|Object[] - AECModelData per input node(s)\n     */\nDocument.getAecModelData = function (bubbleNode) {\n\n  if (Array.isArray(bubbleNode)) {\n\n    var perDoc = new Map();\n    var promises = bubbleNode.map(function (node) {\n      var lmvDoc = node.getDocument();\n      var p = perDoc.get(lmvDoc);\n      if (p) {\n        return p;\n      } else {\n        var _p = lmvDoc.downloadAecModelData();\n\n        perDoc[lmvDoc] = _p;\n\n        return _p;\n      }\n    });\n\n    return Promise.all(promises);\n\n  } else {\n\n    var lmvDoc = bubbleNode.getDocument();\n    return lmvDoc.downloadAecModelData();\n\n  }\n};\n\n/**\n    * Returns a BubbleNode instance, encapsulating the current document manifest JSON.\n    * \n    * @returns {Autodesk.Viewing.BubbleNode}\n    * @see {Autodesk.Viewing.BubbleNode}\n    * \n    * @memberof Autodesk.Viewing.Document\n    * @alias Autodesk.Viewing.Document#getRoot\n    */\nDocument.prototype.getRoot = function () {\n  return this.docRoot;\n};\n\n/**\n    *  Returns the id of this document.\n    *  @returns {string}\n    */\nDocument.prototype.getPath = function ()\n{\n  return this.myPath;\n};\n\n/**\n    * Returns the parent geometry item for a given view item.\n    * @param {object} item - View item.\n    * @returns {object} The parent geometry item.\n    */\nDocument.prototype.getViewGeometry = function (item) {\n  var geometryItem = item.findParentGeom2Dor3D();\n  return geometryItem;\n};\n\n/**\n    * Returns the number of view items underneath a geometry item.\n    * @param {BubbleNode} item - Geometry item.\n    * @returns {number} The number of view items underneath the geometry item.\n    */\nDocument.prototype.getNumViews = function (item) {\n  var _guid = item.guid;\n  if (item instanceof BubbleNode) {\n    _guid = item.guid();\n  }\n  return this.myNumViews[_guid] || 0;\n};\n\n/**\n    * Returns messages (error and warning messages) associated with a given item.\n    * It includes item's messages as well as messages of all its parents.\n    * @param {BubbleNode} item - the manifest node.\n    * @param {boolean} - If true, the top messages that apply to the whole file are excluded.\n    * @returns {object} Returns an array of messages.\n    */\nDocument.prototype.getMessages = function (item, excludeGlobal) {\n\n  var messages = [];\n  if (!item)\n  return messages;\n\n\n  var current = item;\n  while (current) {\n\n    if (excludeGlobal && !current.parent)\n    break;\n\n    if (current._raw().messages) {\n      messages = messages.concat(current._raw().messages);\n    }\n    current = current.parent;\n  }\n\n\n  return messages;\n};\n\n\n\n\nDocument.prototype.getGlobalMessages = function () {\n\n  var collectedmessages = [];\n  var translateFailedCount = 0;\n  var translateProgressCount = 0;\n\n  this.getRoot().traverse(function (obj) {\n    var messages = obj._raw().messages || [];\n\n    var errorMessages = messages.filter(function (msg) {\n      return msg.type === 'error';\n    });\n\n    if (errorMessages.length > 0) {\n      translateFailedCount += 1;\n    }\n\n    if (obj._raw().status === 'inprogress') {\n      translateProgressCount += 1;\n    }\n\n    collectedmessages = collectedmessages.concat(messages);\n  });\n\n  var progress = 'translated';\n\n  progress = translateFailedCount > 0 ? \"failed\" : progress;\n  progress = translateProgressCount > 0 ? 'processing' : progress;\n\n  for (var i = collectedmessages.length; i--; collectedmessages[i].$translation = progress) {;}\n\n  return collectedmessages;\n};","function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}var avp = Autodesk.Viewing.Private;\n\nvar _tmpMatrix1 = null;\nvar _tmpMatrix2 = null;\nvar _tmpMatrix3 = null;\n\nexport var DynamicGlobalOffset = /*#__PURE__*/function () {\n\n  function DynamicGlobalOffset(viewer) {_classCallCheck(this, DynamicGlobalOffset);\n    this.viewer = viewer;\n\n    // If true, globalOffset is updated automatically\n    this.enabled = false;\n\n    // Bind handler to make it usable as event listener\n    this.onCameraChanged = this.onCameraChanged.bind(this);\n\n    // Reset globalOffset as soon as camera position is >= 10 000 units from origin.\n    var maxDist = 10000;\n    this.maxDistSq = maxDist * maxDist;\n\n    this.setActive(true);\n  }_createClass(DynamicGlobalOffset, [{ key: \"setActive\", value: function setActive(\n\n    enabled) {\n      if (enabled == this.enabled) {\n        return;\n      }\n      this.enabled = enabled;\n\n      // Add/remove listener for camera changes\n      if (enabled) {\n        this.viewer.addEventListener(Autodesk.Viewing.CAMERA_CHANGE_EVENT, this.onCameraChanged);\n      } else {\n        this.viewer.removeEventListener(Autodesk.Viewing.CAMERA_CHANGE_EVENT, this.onCameraChanged);\n      }\n    }\n\n    // Recompute model matrix so that the model is shifted from its placement at load time\n    // to the given new placement.\n  }, { key: \"onCameraChanged\",\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n    // Checks if the camera is too far from the origin. If so, it resets the globalOffset, so\n    // that the camera is at the origin in viewer coordinates.\n    //  @param {Viewer3D} viewer\n    //  @param {bool}     force  - always reset globalOffset, even if the camera position is close to the viewer-coords origin\n    value: function onCameraChanged() {\n\n      // GlobalOffset is only defined for 3d models\n      if (this.viewer.impl.is2d) {\n        return;\n      }\n\n      // Ignore camera-change events that we trigger ourselves\n      if (this.blockEvents) {\n        return;\n      }\n\n      // If we are orbiting, defer update until drag is over. This avoids the need to care about changing\n      // offsets in the middle of a drag-interaction. Note for some ugly ortho start-cameras, the model\n      // may look close but is actually far way, so that it may happen that the offset changes several times\n      // while actually orbiting around an object that just seems 10m away.\n      var orbit = this.viewer.toolController.getTool('orbit');\n      if (orbit === null || orbit === void 0 ? void 0 : orbit.isDragging) {\n        return;\n      }\n\n      if (this.viewer.impl.camera.position.lengthSq() < this.maxDistSq) {\n        return;\n      }\n\n      // avoid recursive calls\n      this.blockEvents = true;\n\n      // Use camera position in world-coords as globalOffset\n      var camPosGlobal = this.viewer.impl.camera.getGlobalPosition();\n      this.resetGlobalOffset(camPosGlobal);\n\n      this.blockEvents = false;\n    } }, { key: \"resetGlobalOffset\",\n\n    /**\n                                      * Reset global offset of all models. Only used for 3d.\n                                      */value: function resetGlobalOffset(\n    newOffset) {var _this = this;\n\n      // apply new offset to all visible models \n      this.viewer.getVisibleModels().forEach(function (model) {\n        model.setGlobalOffset(newOffset);\n        _this.viewer.impl.onModelTransformChanged(model);\n      });\n\n      // Due to the modified global offset, all models have been shifted.\n      // So, we must apply the same shift to the camera.\n      this.viewer.impl.camera.setGlobalOffset(newOffset);\n      this.viewer.impl.syncCamera();\n\n      // notify autocam\n      this.viewer.autocam && this.viewer.autocam.onGlobalOffsetChanged(newOffset);\n\n      // Make sure that positions in autocam are reset to new viewer coordinate system (e.g. autocam.center).\n      this.viewer.autocam.sync(this.viewer.impl.camera);\n    } }], [{ key: \"updateModelMatrix\", value: function updateModelMatrix(model, newPlacement, newOffset) {// Use 64-bit precision during computation\n      // tmp matrices\n      _tmpMatrix1 = _tmpMatrix1 || new avp.LmvMatrix4(true);_tmpMatrix2 = _tmpMatrix2 || new avp.LmvMatrix4(true);_tmpMatrix3 = _tmpMatrix3 || new avp.LmvMatrix4(true); // If modelMatrix is set to identity, only the load-time transforms are applied to the model, i.e.\n      //  1. load-time placement is applied:    model.myData.placementTransform is applied\n      //  2. load-time globaloffset is applied: model.myData.globalOffset is subtracted\n      // Our goal is to undo the steps above and apply the new placementTransform and new globalOffset instead.\n      // Therefore, the model transform must combine the following 4 steps:\n      //  1. undo load-time globalOffset\n      //  2. undo load-time placement\n      //  3. apply new placement\n      //  4. apply new globalOffset\n      // Get inverse of placementWithOffset at loadTime. This matrix applies steps 1. and 2.\n      // placementWithOffset may be null\n      var ptoLoadInv = model.myData.placementWithOffset ? _tmpMatrix1.getInverse(model.myData.placementWithOffset) : _tmpMatrix1.identity(); // Get placementWithOffset based on new placement/offset. This matrix applies steps 3. and 4.\n      var ptoNew = newPlacement ? _tmpMatrix2.copy(newPlacement) : _tmpMatrix2.identity();if (newOffset) {ptoNew.elements[12] -= newOffset.x;ptoNew.elements[13] -= newOffset.y;ptoNew.elements[14] -= newOffset.z;} // Apply ptoLoadTimeInv first, then ptoNew\n      var modelMatrix = _tmpMatrix3.multiplyMatrices(ptoNew, ptoLoadInv);model.setModelTransform(modelMatrix);} }]);return DynamicGlobalOffset;}();","\nexport var EventDispatcher = function EventDispatcher() {\n};\n\n\nEventDispatcher.prototype = {\n\n  constructor: EventDispatcher,\n\n\n  apply: function apply(object) {\n\n    object.addEventListener = EventDispatcher.prototype.addEventListener;\n    object.hasEventListener = EventDispatcher.prototype.hasEventListener;\n    object.removeEventListener = EventDispatcher.prototype.removeEventListener;\n    object.clearListeners = EventDispatcher.prototype.clearListeners;\n    object.fireEvent = EventDispatcher.prototype.fireEvent;\n    object.dispatchEvent = EventDispatcher.prototype.fireEvent;\n    object.debugEvents = EventDispatcher.prototype.debugEvents;\n  },\n\n  /**\n      * Adds an event listener.\n      * \n      * @param {string} type - Event type identifier.\n      * @param {function} listener - Callback function, receives an event parameter.\n      * @param {object} [options] - Options object with characteristics about the event listener.\n      * @param {bool} [options.once] - When true, the event listener will only get invoked once. Defaults to false. \n      * @param {number} [options.priority] - Priority of the event-listener. The higher the priority - the sooner the listener will be called.\n      */\n  addEventListener: function addEventListener(type, listener, options)\n  {\n    if (!type) return;\n    if (this.listeners === undefined) this.listeners = {};\n\n    if (typeof this.listeners[type] == \"undefined\") {\n      this.listeners[type] = [];\n    }\n\n    var priority = options && options.priority || 0;\n    var indexToPush = this.listeners[type].length;\n\n    for (var i = this.listeners[type].length - 1; i >= 0; i--) {\n      if (priority > this.listeners[type][i].priority) {\n        indexToPush--;\n      } else {\n        break;\n      }\n    }\n\n    this.listeners[type].splice(indexToPush, 0, {\n      callbackFn: listener,\n      once: options ? !!options.once : false,\n      priority: priority });\n\n  },\n\n  /**\n      * Returns true if the specified listener already exists, false otherwise.\n      * \n      * @param {string} type - Event type identifier.\n      * @param {function} listener - Callback function to check if it will be already registered.\n      */\n  hasEventListener: function hasEventListener(type, listener) {\n\n    if (!type) return false;\n    if (this.listeners === undefined) return false;\n\n    var typeListeners = this.listeners[type];\n    if (!typeListeners || typeListeners.length === 0)\n    return false;\n\n    for (var i = 0, len = typeListeners.length; i < len; ++i) {\n      if (typeListeners[i].callbackFn === listener)\n      return true;\n    }\n\n    return false;\n  },\n\n\n  /**\n      * Removes an event listener. \n      * If the event listener is not registered then nothing happens.\n      * \n      * @param {string} type - Event type identifier.\n      * @param {function} listener - Callback function to remove.\n      */\n  removeEventListener: function removeEventListener(type, listener)\n  {\n    if (!type) return;\n    if (this.listeners === undefined) {\n      this.listeners = {};\n      return;\n    }\n\n    var typeListeners = this.listeners[type];\n    if (!typeListeners) return;\n\n    for (var i = 0, len = typeListeners.length; i < len; ++i) {\n      if (typeListeners[i].callbackFn === listener) {\n        typeListeners.splice(i, 1);\n        break;\n      }\n    }\n  },\n\n  /**\n      * Remove all listeners registered for all event types.\n      */\n  clearListeners: function clearListeners()\n  {\n    this.listeners = undefined;\n  },\n\n  /**\n      * Invokes all listeners registered to the event's type.\n      * \n      * @param {(string | object)} event - Either a string type identifier or an object which \n      * will get passed along to each listener. The event object must contain a ``type`` attribute.\n      */\n  dispatchEvent: function dispatchEvent(event)\n  {\n    if (this.listeners === undefined) {\n      this.listeners = {};\n      return;\n    }\n\n    if (typeof event == \"string\") {\n      event = { type: event };\n    }\n\n    if (!event.target) {\n      try {\n        event.target = this;\n      } catch (e) {}\n    }\n\n    if (!event.type) {\n      throw new Error(\"event type unknown.\");\n    }\n\n    if (this._doDebug) {\n      console.log('Event: ' + event.type);\n    }\n\n    if (!Array.isArray(this.listeners[event.type]))\n    return;\n\n    var typeListeners = this.listeners[event.type].slice(); // shallow copy\n    var oneShots = [];\n\n    for (var i = 0, len = typeListeners.length; i < len; ++i) {\n      typeListeners[i].callbackFn.call(this, event);\n      if (typeListeners[i].once) {\n        oneShots.push(typeListeners[i].callbackFn);\n      }\n    }\n\n    for (var j = 0; j < oneShots.length; ++j) {\n      this.removeEventListener(event.type, oneShots[j]);\n    }\n  },\n\n  /**\n      * \n      */\n  debugEvents: function debugEvents(enable) {\n    this._doDebug = enable;\n  } };\n\n\n\n// Legacy event routine needs to be deprecated.\nEventDispatcher.prototype.fireEvent = EventDispatcher.prototype.dispatchEvent;\n\n//TODO_TS: Have to export to the global namespace in order for class inheritance\n//for non-modular objects to work.\nif (typeof Autodesk !== \"undefined\") {\n  Autodesk.Viewing.EventDispatcher = EventDispatcher;\n}","\n\n\"use strict\";\n\nvar av = module.exports;\n\n/**\n                          * Fired when the ESC key is pressed.\n                          * @event Autodesk.Viewing#ESCAPE_EVENT\n                          */\nav.ESCAPE_EVENT = 'escape';\n/**\n                             * Fired repeatedly throughout the process of opening a model/drawing.\n                             * @event Autodesk.Viewing#PROGRESS_UPDATE_EVENT\n                             * @property {number} percent - Estimated progress.\n                             * @property {number} state - Value from Autodesk.Viewing.ProgressState, providing details on the progress state.\n                             * @property {object} model - Model being loaded.\n                             */\nav.PROGRESS_UPDATE_EVENT = 'progress';\n/**\n                                        * Fired when the screen mode changes.\n                                        * @event Autodesk.Viewing#FULLSCREEN_MODE_EVENT\n                                        * @property {Autodesk.Viewing.ScreenMode} mode - New screen mode.\n                                        */\nav.FULLSCREEN_MODE_EVENT = 'fullScreenMode';\n/**\n                                              * Fired then the navigation tool changes.\n                                              * @event Autodesk.Viewing#NAVIGATION_MODE_CHANGED_EVENT\n                                              * @property {string} id - Tool identifier.\n                                              */\nav.NAVIGATION_MODE_CHANGED_EVENT = 'navmode';\n/**\n                                               * Fired when the viewer state is restored.\n                                               * @event Autodesk.Viewing#VIEWER_STATE_RESTORED_EVENT\n                                               * @property {bool} value - Success of the state restoration.\n                                               */\nav.VIEWER_STATE_RESTORED_EVENT = 'viewerStateRestored';\n/**\n                                                         * Fired when the viewer size changes.\n                                                         * @event Autodesk.Viewing#VIEWER_RESIZE_EVENT\n                                                         * @property {number} width - New width of the viewer.\n                                                         * @property {number} height - New height of the viewer.\n                                                         */\nav.VIEWER_RESIZE_EVENT = 'viewerResize';\n/**\n                                          * Fired when the viewer is fully initialized.\n                                          * @event Autodesk.Viewing#VIEWER_INITIALIZED\n                                          */\nav.VIEWER_INITIALIZED = 'viewerInitialized';\n/**\n                                              * Fired when the viewer is fully uninitialized.\n                                              * @event Autodesk.Viewing#VIEWER_UNINITIALIZED\n                                              */\nav.VIEWER_UNINITIALIZED = 'viewerUninitialized';\n\n/**\n                                                  * Fired when the viewer begins loading a model, before the\n                                                  * Model instance gets created.\n                                                  *\n                                                  * @event Autodesk.Viewing#LOADER_LOAD_FILE_EVENT\n                                                  * @property {object} loader - Instance of the Loader class\n                                                  */\nav.LOADER_LOAD_FILE_EVENT = 'loaderLoadFile';\n\n/**\n                                               * Fired when an error is detected during a load.\n                                               *\n                                               * @event Autodesk.Viewing#LOADER_LOAD_ERROR_EVENT\n                                               * @property {object} loader - Instance of the Loader class\n                                               * @property {object} error - The error reported by the loader.\n                                               */\nav.LOADER_LOAD_ERROR_EVENT = 'loaderLoadError';\n\n/**\n                                                 * Fired when the viewer receives and parses the initial model manifest.\n                                                 * @event Autodesk.Viewing#MODEL_ROOT_LOADED_EVENT\n                                                 * @property {object} svf - Parsed SVF/F2D JSON.\n                                                 * @property {object} model - Model data.\n                                                 */\nav.MODEL_ROOT_LOADED_EVENT = 'svfLoaded';\n\n/**\n                                           * Fired when the model/drawing finishes loading.\n                                           * @event Autodesk.Viewing#GEOMETRY_LOADED_EVENT\n                                           * @property {object} model - Model data.\n                                           */\nav.GEOMETRY_LOADED_EVENT = 'geometryLoaded';\n\n/**\n                                             * Fired when the model/drawing textures finish loading.\n                                             * @event Autodesk.Viewing#TEXTURES_LOADED_EVENT\n                                             * @property {object} model - Model data.\n                                             */\nav.TEXTURES_LOADED_EVENT = 'texturesLoaded';\n/**\n                                              * Fired when the instance tree is successfully created.\n                                              * @event Autodesk.Viewing#OBJECT_TREE_CREATED_EVENT\n                                              * @property {object} svf - Parsed SVF/F2D JSON.\n                                              * @property {object} model - Model data.\n                                              */\nav.OBJECT_TREE_CREATED_EVENT = 'propertyDbLoaded';\n/**\n                                                    * Fired when there's an error while parsing the instance tree.\n                                                    * @event Autodesk.Viewing#OBJECT_TREE_UNAVAILABLE_EVENT\n                                                    * @property {object} svf - Parsed SVF/F2D JSON.\n                                                    * @property {object} model - Model data.\n                                                    */\nav.OBJECT_TREE_UNAVAILABLE_EVENT = 'propertyDbUnavailable';\n/**\n                                                             * Fired when there's a progress event during propertyDB loading.\n                                                             * @event Autodesk.Viewing#OBJECT_TREE_LOAD_PROGRESS_EVENT\n                                                             * @property {object} svf - Parsed SVF/F2D JSON.\n                                                             * @property {object} model - Model data.\n                                                             */\nav.OBJECT_TREE_LOAD_PROGRESS_EVENT = 'propertyDbLoadProgress';\n\n/**\n                                                                * Fired when a model is removed from the viewer.\n                                                                * @event Autodesk.Viewing#MODEL_UNLOADED_EVENT\n                                                                * @property {object} model - Model data.\n                                                                */\nav.MODEL_UNLOADED_EVENT = 'modelUnloaded';\n\n/**\n                                            * Fired when a model is added to model queue so as to be visible.\n                                            * @event Autodesk.Viewing#MODEL_ADDED_EVENT\n                                            * @property {object} model - Model data.\n                                            */\nav.MODEL_ADDED_EVENT = 'modelAdded';\n\n/**\n                                      * Fired when a model is removed from model queue, i.e. changed to invisible.\n                                      * @event Autodesk.Viewing#MODEL_REMOVED_EVENT\n                                      * @property {object} model - Model data.\n                                      */\nav.MODEL_REMOVED_EVENT = 'modelRemoved';\n\n/**\n                                          * Fired when the layers of the model are successfully loaded.\n                                          * @event Autodesk.Viewing#MODEL_LAYERS_LOADED_EVENT\n                                          * @property {object} root - Model layers root.\n                                          * @property {object} model - Model data.\n                                          */\nav.MODEL_LAYERS_LOADED_EVENT = 'modelLayersLoaded';\n\n/**\n                                                     * Fired a when model transform matrix has been changed. This usually happens if either placement or globalOffset\n                                                     * has changed for a model.\n                                                     * @event Autodesk.Viewing#MODEL_TRANSFORM_CHANGED_EVENT\n                                                     * @property {object} model - Model data.\n                                                     * @property {object} matrix - Transform matrix.\n                                                     */\nav.MODEL_TRANSFORM_CHANGED_EVENT = 'modelTransformChanged',\n\n/**\n                                                             * Fired if placementTransform was changed. \n                                                             */\nav.MODEL_PLACEMENT_CHANGED_EVENT = 'placementTransformChanged',\n\n/**\n                                                                 * Fired when a viewer extension is successfully loaded.\n                                                                 * @event Autodesk.Viewing#EXTENSION_LOADED_EVENT\n                                                                 * @property {string} extensionId - Extension identifier.\n                                                                 */\nav.EXTENSION_LOADED_EVENT = 'extensionLoaded';\n/**\n                                                * Fired when a viewer extension is successfully unloaded.\n                                                * @event Autodesk.Viewing#EXTENSION_UNLOADED_EVENT\n                                                * @property {string} extensionId - Extension identifier.\n                                                */\nav.EXTENSION_UNLOADED_EVENT = 'extensionUnloaded';\n\n/**\n                                                    * Fired when the list of selected objects changes.\n                                                    * @event Autodesk.Viewing#SELECTION_CHANGED_EVENT\n                                                    * @property {number[]} fragIdsArray - Fragment IDs of selected objects.\n                                                    * @property {number[]} dbIdArray - dbIDs of selected objects.\n                                                    * @property {number[]} nodeArray - Same as dbIdArray.\n                                                    * @property {object} model - Model data.\n                                                    */\nav.SELECTION_CHANGED_EVENT = 'selection';\n/**\n                                           * Fired when the list of selected objects changes in a multi-model context.\n                                           * @event Autodesk.Viewing#AGGREGATE_SELECTION_CHANGED_EVENT\n                                           * @property {object[]} selections - List of objects containing the typical selection properties\n                                           *   of {@link Autodesk.Viewing#SELECTION_CHANGED_EVENT} for each model.\n                                           */\nav.AGGREGATE_SELECTION_CHANGED_EVENT = 'aggregateSelection';\n/**\n                                                              * Fired when the viewer isolates a set of objects (i.e., makes everything else invisible or ghosted).\n                                                              * @event Autodesk.Viewing#ISOLATE_EVENT\n                                                              * @property {number[]} nodeIdArray - List of isolated node IDs.\n                                                              * @property {object} model - Model data.\n                                                              */\nav.ISOLATE_EVENT = 'isolate';\n/**\n                               * Fired when the list of isolated objects changes in a multi-model context.\n                               * @event Autodesk.Viewing#AGGREGATE_ISOLATION_CHANGED_EVENT\n                               * @property {object[]} isolation - List of objects containing the typical selection properties\n                               *   of {@link Autodesk.Viewing#ISOLATE_EVENT} for each model.\n                               */\nav.AGGREGATE_ISOLATION_CHANGED_EVENT = 'aggregateIsolation';\n/**\n                                                              * Fired when the viewer hides a set of objects.\n                                                              * @event Autodesk.Viewing#HIDE_EVENT\n                                                              * @property {number[]} nodeIdArray - List of hidden node IDs.\n                                                              * @property {object} model - Model data.\n                                                              */\nav.HIDE_EVENT = 'hide';\n/**\n                         * Fired when the list of hidden objects changes in a multi-model context.\n                         * @event Autodesk.Viewing#AGGREGATE_HIDDEN_CHANGED_EVENT\n                         * @property {object[]} hidden - List of objects containing the typical selection properties\n                         *   of {@link Autodesk.Viewing#HIDE_EVENT} for each model.\n                         */\nav.AGGREGATE_HIDDEN_CHANGED_EVENT = 'aggregateHidden';\n\n/**\n                                                        * Fired when the viewer shows a set of objects.\n                                                        * @event Autodesk.Viewing#SHOW_EVENT\n                                                        * @property {number[]} nodeIdArray - List of shown node IDs.\n                                                        * @property {object} model - Model data.\n                                                        */\nav.SHOW_EVENT = 'show';\n\n/**\n                         * Fired to show the properties of the object.\n                         * @event Autodesk.Viewing#SHOW_PROPERTIES_EVENT\n                         * @property {number} dbId - dbId of the object.\n                         * @property {object} model - Model data.\n                         */\nav.SHOW_PROPERTIES_EVENT = 'showProperties';\n\n/**\n                                              * Fired whenever `viewer.showAll()` is used.\n                                              *\n                                              * @event Autodesk.Viewing#SHOW_ALL_EVENT\n                                              */\nav.SHOW_ALL_EVENT = 'showAll';\n\n/**\n                                * Fired when a camera changes.\n                                * @event Autodesk.Viewing#CAMERA_CHANGE_EVENT\n                                * @property {object} camera - Affected camera.\n                                */\nav.CAMERA_CHANGE_EVENT = 'cameraChanged';\n/**\n                                           * Fired whenever the Explode tool is used.\n                                           * @event Autodesk.Viewing#EXPLODE_CHANGE_EVENT\n                                           * @property {number} scale - Scale of the current exploded state.\n                                           */\nav.EXPLODE_CHANGE_EVENT = 'explodeChanged';\n/**\n                                             * Fired when a ``fitToView`` operation is applied.\n                                             * @event Autodesk.Viewing#FIT_TO_VIEW_EVENT\n                                             * @property {boolean} immediate - True if the change was immediate.\n                                             * @property {number[]} nodeIdArray - List of node IDs fitted. Array is empty when fitting to the whole model.\n                                             * @property {object} model - Model data.\n                                             */\nav.FIT_TO_VIEW_EVENT = 'fitToView';\n/**\n                                     * Fired when ``fitToView`` operation is applied, supports multi-model contexts.\n                                     * @event Autodesk.Viewing#AGGREGATE_FIT_TO_VIEW_EVENT\n                                     * @property {object[]} selection - List of objects each containing a ``model`` instance and a ``selection`` array of ids.\n                                     */\nav.AGGREGATE_FIT_TO_VIEW_EVENT = 'aggregateFitToView';\n/**\n                                                        * Fired when the cutting planes change.\n                                                        * @event Autodesk.Viewing#CUTPLANES_CHANGE_EVENT\n                                                        * @property {object[]} planes - List of cutplanes.\n                                                        */\nav.CUTPLANES_CHANGE_EVENT = 'cutplanesChanged';\n/**\n                                                 * Fired when a tool is activated or deactivated.\n                                                 * @event Autodesk.Viewing#TOOL_CHANGE_EVENT\n                                                 * @property {string} toolName - Name of a specific mode of a tool.\n                                                 * @property {object} tool - Tool object.\n                                                 * @property {bool} active - Current status of the tool.\n                                                 */\nav.TOOL_CHANGE_EVENT = 'toolChanged';\n/**\n                                       * Fired when rendering options change.\n                                       * @event Autodesk.Viewing#RENDER_OPTION_CHANGED_EVENT\n                                       */\nav.RENDER_OPTION_CHANGED_EVENT = 'renderOptionChanged';\n/**\n                                                         * Fired when the render frame shown by the Viewer is final or complete (it has\n                                                         * no more pending geometry or post processing effects which delay incoming frames),\n                                                         * or when the Viewer stops showing final frames. The name refers to when the\n                                                         * state changes from busy to idle for the renderer, or vice versa. To know\n                                                         * when all geometry is fully displayed, also check for GEOMETRY_LOADED_EVENT.\n                                                         *\n                                                         * @event Autodesk.Viewing#FINAL_FRAME_RENDERED_CHANGED_EVENT\n                                                         * @property {bool} finalFrame - final frame is displayed this tick.\n                                                         */\nav.FINAL_FRAME_RENDERED_CHANGED_EVENT = 'finalFrameRenderedChanged';\n/**\n                                                                      * Fired when the render has presented to the screen.\n                                                                      * @event Autodesk.Viewing#RENDER_PRESENTED_EVENT\n                                                                      */\nav.RENDER_PRESENTED_EVENT = 'renderPresented';\n/**\n                                                * Fired when visibility of a 2D layer changes.\n                                                * @event Autodesk.Viewing#LAYER_VISIBILITY_CHANGED_EVENT\n                                                */\nav.LAYER_VISIBILITY_CHANGED_EVENT = 'layerVisibility';\n\n/**\n                                                        * Fired when a user preference property changes.\n                                                        * @event Autodesk.Viewing#PREF_CHANGED_EVENT\n                                                        * @property {string} name - Property name.\n                                                        * @property {object} value - New property value.\n                                                        */\nav.PREF_CHANGED_EVENT = 'PrefChanged';\n/**\n                                        * Fired when a user preference property is reset.\n                                        * @event Autodesk.Viewing#PREF_RESET_EVENT\n                                        * @property {string} name - Property name.\n                                        * @property {object} value - New property value.\n                                        */\nav.PREF_RESET_EVENT = 'PrefReset';\n\n/**\n                                    * Fired as a result of invoking `viewer.restoreDefaultSettings()` to restore default settings.\n                                    * Will get fired after all other Autodesk.Viewing.PREF_CHANGED_EVENT get fired.\n                                    * @event Autodesk.Viewing#RESTORE_DEFAULT_SETTINGS_EVENT\n                                    */\nav.RESTORE_DEFAULT_SETTINGS_EVENT = 'restoreDefaultSettings';\n\n/**\n                                                               * Fired when animations are successfully initialized.\n                                                               * @event Autodesk.Viewing#ANIMATION_READY_EVENT\n                                                               */\nav.ANIMATION_READY_EVENT = 'animationReady';\n\n/**\n                                              * Fired whenever a camera transition is finished, such as Focus, Go to Home View,\n                                              * Restore State, restore Named Views, and others.\n                                              * @event Autodesk.Viewing#CAMERA_TRANSITION_COMPLETED\n                                              */\nav.CAMERA_TRANSITION_COMPLETED = 'cameraTransitionCompleted';\n\n/**\n                                                               * Fired when user clicks on a hyperlink embedded in the model.\n                                                               * @event Autodesk.Viewing#HYPERLINK_EVENT\n                                                               * @property {object} data - Hyperlink data.\n                                                               */\nav.HYPERLINK_EVENT = 'hyperlink';\n\nav.HYPERLINK_NAVIGATE = 'hyperlink_navigate';\n\nav.LOAD_GEOMETRY_EVENT = 'load_geometry';\n\n/**\n                                          * Fired when something in the view changes that may expose missing geometry.\n                                          * @event Autodesk.Viewing#LOAD_MISSING_GEOMETRY\n                                          * @property {boolean} [delay] - A flag used to aggregate multiple events during user interactions.\n                                          *                               Defaults to true.\n                                          */\nav.LOAD_MISSING_GEOMETRY = 'loadMissingGeometry';\n\n/**\n                                                   * Fired when the drawing buffer associated with a WebGLRenderingContext object has been lost\n                                                   * \n                                                   * @event Autodesk.Viewing#WEBGL_CONTEXT_LOST_EVENT\n                                                   */\nav.WEBGL_CONTEXT_LOST_EVENT = 'webglcontextlost';\n\n/**\n                                                   * Fired when a leaflet screenshot needs to be canceled before downloading all required / pending tiles.\n                                                   * \n                                                   * @event Autodesk.Viewing#CANCEL_LEAFLET_SCREENSHOT\n                                                   */\nav.CANCEL_LEAFLET_SCREENSHOT = 'cancelLeafletScreenshot';\n\n\n/**\n                                                           * Fired after a successful call into {Autodesk.Viewing.Viewer3D#setView}.\n                                                           * \n                                                           * @event Autodesk.Viewing#SET_VIEW_EVENT\n                                                           * @property {Autodesk.Viewing.BubbleNode} view - The view object that was applied.\n                                                           */\nav.SET_VIEW_EVENT = 'setView';\n\n\n/**\n                                * Fired when the first pixel of the model is ready to be rendered.\n                                * \n                                * @event Autodesk.Viewing#RENDER_FIRST_PIXEL\n                                */\nav.RENDER_FIRST_PIXEL = 'renderFirstPixel';\n\n/**\n                                             * Fired when a profile is added to the viewer.profileManager\n                                             * @event Autodesk.Viewing#PROFILE_CHANGE_EVENT\n                                             */\nav.PROFILE_CHANGE_EVENT = 'profileChanged';\n\n/**\n                                             * Fired when a scene part is about to be rendered\n                                             * @event Autodesk.Viewing#PROFILE_CHANGE_EVENT\n                                             */\nav.RENDER_SCENE_PART = 'renderScenePart';\n\n/**\n                                           * Fired when object under mouse changed.\n                                           * @event Autodesk.Viewing#OBJECT_UNDER_MOUSE_CHANGED\n                                           */\nav.OBJECT_UNDER_MOUSE_CHANGED = 'hoverObjectChanged';","function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {try {var info = gen[key](arg);var value = info.value;} catch (error) {reject(error);return;}if (info.done) {resolve(value);} else {Promise.resolve(value).then(_next, _throw);}}function _asyncToGenerator(fn) {return function () {var self = this,args = arguments;return new Promise(function (resolve, reject) {var gen = fn.apply(self, args);function _next(value) {asyncGeneratorStep(gen, resolve, reject, _next, _throw, \"next\", value);}function _throw(err) {asyncGeneratorStep(gen, resolve, reject, _next, _throw, \"throw\", err);}_next(undefined);});};}function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}import { getGlobal } from \"../compat\";\n\n\nvar _useLeftHandedInput = false;\nvar __firefoxLMBfix = false;\n\n\n/** \n                              * Contains static utility functions for DOM and viewer events.\n                              *\n                              * @memberof Autodesk.Viewing\n                              * @alias Autodesk.Viewing.EventUtils\n                              */\nexport var EventUtils = /*#__PURE__*/function () {function EventUtils() {_classCallCheck(this, EventUtils);}_createClass(EventUtils, null, [{ key: \"isRightClick\",\n    /**\n                                                                                                                                                                    * @param {DOMEvent} event - A browser-triggered event\n                                                                                                                                                                    * @returns {boolean} true when the event matches a secondary-button click.\n                                                                                                                                                                    *\n                                                                                                                                                                    * @alias Autodesk.Viewing.EventUtils#isRightClick\n                                                                                                                                                                    */value: function isRightClick(\n    event) {\n      var _window = getWindowFromEvent(event);\n      if (!(event instanceof _window.MouseEvent))\n      return false;\n\n      var button = event.button;\n\n      // Check for Firefox spoof: Control+LMB converted to RMB.\n      // The \"buttons\" property in Firefox will include 1 for LMB and 2 for RMB.\n      if (\"buttons\" in event) {\n        // For button down the 1 bit will be on indicating LMB.\n        // For button up it's off so check the flag to see if we\n        // switched the down event.\n        if (__firefoxLMBfix && !(event.buttons & 1)) {// Button up?\n          __firefoxLMBfix = false;\n          button = 0;\n        } else if (button === 2 && event.buttons & 1) {\n          button = 0; // Convert back to reality.\n          __firefoxLMBfix = true;\n        }\n      }\n\n      var rightButton = _useLeftHandedInput ? 0 : 2;\n\n      return button === rightButton;\n    }\n\n    /**\n       * @param {DOMEvent} event - A browser-triggered event\n       * @returns {boolean} true when the event matches a middle-button mouse click.\n       *\n       * @alias Autodesk.Viewing.EventUtils#isMiddleClick\n       */ }, { key: \"isMiddleClick\", value: function isMiddleClick(\n    event) {\n      var _window = getWindowFromEvent(event);\n      if (!(event instanceof _window.MouseEvent))\n      return false;\n\n      return event.button === 1;\n    }\n\n    /**\n       * Internally used function to set UX for left-handed users.\n       * @param {boolean} value - true to switch left and right buttons.\n       *\n       * @alias Autodesk.Viewing.EventUtils#setUseLeftHandedInput\n       *\n       * @private\n       */ }, { key: \"setUseLeftHandedInput\", value: function setUseLeftHandedInput(\n    value) {\n      _useLeftHandedInput = value;\n    }\n\n    /**\n       * If there's no camera transition, return immediately.\n       * Otherwise, resolve when the camera transition is finished.\n       * @param {Autodesk.Viewing.Viewer3D} viewer\n       * @alias Autodesk.Viewing.EventUtils#waitUntilTransitionEnded\n       */ }, { key: \"waitUntilTransitionEnded\", value: function () {var _waitUntilTransitionEnded = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee(\n      viewer) {return regeneratorRuntime.wrap(function _callee$(_context) {while (1) {switch (_context.prev = _context.next) {case 0:if (!(\n                !viewer.navigation.getRequestTransition() && !viewer.navigation.getTransitionActive())) {_context.next = 2;break;}return _context.abrupt(\"return\");case 2:return _context.abrupt(\"return\",\n\n\n\n                new Promise(function (resolve) {\n                  setTimeout(function () {\n                    // Try again in case there is a requestTransition, but CAMERA_TRANSITION_COMPLETED didn't get fired.\n                    // It can happen in case there is a requestTransition to the same camera position exactly.\n                    if (!viewer.navigation.getRequestTransition() && !viewer.navigation.getTransitionActive()) {\n                      resolve();\n                    } else {\n                      viewer.addEventListener(Autodesk.Viewing.CAMERA_TRANSITION_COMPLETED, resolve, { once: true });\n                    }\n                  });\n                }));case 3:case \"end\":return _context.stop();}}}, _callee);}));function waitUntilTransitionEnded(_x) {return _waitUntilTransitionEnded.apply(this, arguments);}return waitUntilTransitionEnded;}()\n\n\n    /**\n                                                                                                                                                                                                                    * If geometry has been loaded, return immediately.\n                                                                                                                                                                                                                    * Otherwise, resolve when the geometry loaded event is fired.\n                                                                                                                                                                                                                    * @param {Autodesk.Viewing.Viewer3D} viewer\n                                                                                                                                                                                                                    * @param [Autodesk.Viewing.Model] model - Default is viewer.model, if not provided\n                                                                                                                                                                                                                    * @alias Autodesk.Viewing.EventUtils#waitUntilGeometryLoaded\n                                                                                                                                                                                                                    */ }, { key: \"waitUntilGeometryLoaded\", value: function () {var _waitUntilGeometryLoaded = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee2(\n      viewer) {var model,_args2 = arguments;return regeneratorRuntime.wrap(function _callee2$(_context2) {while (1) {switch (_context2.prev = _context2.next) {case 0:model = _args2.length > 1 && _args2[1] !== undefined ? _args2[1] : viewer.model;if (!(\n                model && model.isLoadDone())) {_context2.next = 3;break;}return _context2.abrupt(\"return\");case 3:return _context2.abrupt(\"return\",\n\n\n\n                new Promise(function (resolve) {\n                  var cb = function cb(e) {\n                    // In the case where we set this wait very early (before a model is even loaded),\n                    // the default model will be null, so in that case just resolve\n                    if (!model || model === e.model) {\n                      resolve();\n                      viewer.removeEventListener(Autodesk.Viewing.GEOMETRY_LOADED_EVENT, cb);\n                    }\n                  };\n                  viewer.addEventListener(Autodesk.Viewing.GEOMETRY_LOADED_EVENT, cb);\n                }));case 4:case \"end\":return _context2.stop();}}}, _callee2);}));function waitUntilGeometryLoaded(_x2) {return _waitUntilGeometryLoaded.apply(this, arguments);}return waitUntilGeometryLoaded;}() }]);return EventUtils;}();\n\n\n\n\n/**\n                                                                                                                                                                                                                                               * @private\n                                                                                                                                                                                                                                               */\nfunction getWindowFromEvent(event) {\n  var _document = event.target && event.target.ownerDocument;\n  if (_document) {\n    return _document.defaultView || _document.parentWindow;\n  }\n  return getGlobal();\n}\n\n\n// Backwards compatibility - TODO: Remove in v8.0.0\nAutodesk.Viewing.isRightClick = EventUtils.isRightClick;\nAutodesk.Viewing.isMiddleClick = EventUtils.isMiddleClick;","\nimport { extendLocalization } from \"../globalization/i18init\";\nimport { GlobalManagerMixin } from \"../application/GlobalManagerMixin\";\n\n/**\n                                                                         * Base class for extending the functionality of the viewer.\n                                                                         *\n                                                                         * Derive from this class and implement methods `load()` and `unload()`.\n                                                                         *\n                                                                         * Register this extension by calling:\n                                                                         * `Autodesk.Viewing.theExtensionManager.registerExtension('your_extension_id', YOUR_EXTENSION_CLASS); `\n                                                                         *\n                                                                         * Extensions are registered and loaded automatically by adding the Extension ID to the\n                                                                         * config object passed to the viewer constructor.\n                                                                         *\n                                                                         * @alias Autodesk.Viewing.Extension\n                                                                         * @param {Autodesk.Viewing.Viewer3D} viewer - The viewer to be extended.\n                                                                         * @param {object} options - An optional dictionary of options for this extension.\n                                                                         * \n                                                                         * @property {Autodesk.Viewing.Viewer3D} viewer - The viewer instance passed in during construction.\n                                                                         * @property {object} options - The optional dictionary of options for this extension passed in during construction.\n                                                                         * @property {string} id - An identifier used to load the extension. Populated automatically by {@link Autodesk.Viewing.ExtensionManager}.\n                                                                         * @property {string[]} modes - A collection of activation modes the extension supports.\n                                                                         * @property {boolean} activeStatus - Reflects whether the extension has been activated, see {@link Autodesk.Viewing.Extension#activate}.\n                                                                         * \n                                                                         * @constructor\n                                                                         */\nexport var Extension = function Extension(viewer, options) {\n  this.viewer = viewer;\n  GlobalManagerMixin.call(this);\n  this.setGlobalManager(viewer.globalManager);\n  this.options = options || {};\n  this.id = ''; // Populated by theExtensionManager\n  this.modes = [];\n  this.mode = '';\n  this.name = '';\n  this.activeStatus = false;\n};\n\n\n/**\n    * Override the load method to add functionality to the viewer.\n    * Use the Viewer's APIs to add/modify/replace/delete UI, register event listeners, etc.\n    * @returns {boolean | Promise} True if the load was successful. Optionally, the function can return a Promise which resolves when load succeeds and rejects in case of failure.\n    * @virtual\n    * @alias Autodesk.Viewing.Extension#load\n    */\nExtension.prototype.load = function () {\n  return true;\n};\n\n/**\n    * Override the unload method to perform some cleanup of operations that were done in load.\n    * @returns {boolean} True if the unload was successful.\n    * @virtual\n    * @alias Autodesk.Viewing.Extension#unload\n    */\nExtension.prototype.unload = function () {\n  return true;\n};\n\n/**\n    * Override the activate method to enable the functionality of the extension.\n    * @param [mode] - An optional mode that indicates a different way the extension can function.\n    * @see {@link Autodesk.Viewing.Extension#getModes }\n    * @returns {boolean} True if the extension activation was successful.\n    * @virtual\n    * @alias Autodesk.Viewing.Extension#activate\n    */\nExtension.prototype.activate = function (mode) {\n  return true;\n};\n\n/**\n    * Override the deactivate method to disable the functionality of the extension.\n    * @returns {boolean} True if the extension deactivation was successful.\n    * @virtual\n    * @alias Autodesk.Viewing.Extension#deactivate\n    */\nExtension.prototype.deactivate = function () {\n  return true;\n};\n\n/**\n    * Activates the extension if the enable parameter is set to true.\n    * Deactivates the extension if the enable parameter is set to true.\n    * @param {boolean} enable - flag to activate or deactivate the extension.\n    * @virtual\n    * @alias Autodesk.Viewing.Extension#setActive \n    */\nExtension.prototype.setActive = function (enable) {\n  if (enable) {\n    this.activate();\n  } else {\n    this.deactivate();\n  }\n};\n\n/**\n    * Gets the name of the extension.\n    * @returns {string} Returns the name of the extension.\n    * @alias Autodesk.Viewing.Extension#getName\n    */\nExtension.prototype.getName = function () {\n  return this.name;\n};\n\n/**\n    * Gets an array of modes available for the extension.\n    * @returns {Array} Returns an array of modes.\n    * @alias Autodesk.Viewing.Extension#getModes\n    */\nExtension.prototype.getModes = function () {\n  return this.modes;\n};\n\n/**\n    * Check if the extension is active and optionally check if the specified mode is active for that extension.\n    * @param mode - An optional mode that indicates a different way the extension can function.\n    * @see {@link Autodesk.Viewing.Extension#getModes }\n    * @returns {boolean} Default - True if the extension is active.\n    * When optional argument mode is specified, returns true if both extension and the mode are active, false otherwise.\n    * @alias Autodesk.Viewing.Extension#isActive\n    */\nExtension.prototype.isActive = function (mode) {\n  if (mode) {\n    return this.activeStatus && this.mode === mode;\n  } else {\n    return this.activeStatus;\n  }\n};\n\n/**\n    * Gets the extension state as a plain object. Intended to be called when viewer state is requested.\n    * @param {object} viewerState - Object to inject extension values.\n    * @virtual\n    * @alias Autodesk.Viewing.Extension#getState\n    */\nExtension.prototype.getState = function (viewerState) {\n};\n\n/**\n    * Restores the extension state from a given object.\n    * @param {object} viewerState - Viewer state.\n    * @param {boolean} immediate - Whether the new view is applied with (true) or without transition (false).\n    * @returns {boolean} True if restore operation was successful.\n    * @virtual\n    * @alias Autodesk.Viewing.Extension#restoreState\n    */\nExtension.prototype.restoreState = function (viewerState, immediate) {\n  return true;\n};\n\n/**\n    * Add localization strings to the viewer. \n    * This method can override localization keys already loaded.\n    * There is no API method to remove localization strings added with this method.\n    * \n    * @example\n    * var locales = {\n           en: { my_tooltip: \"CUSTOM_TOOLTIP\" },\n           de: { my_tooltip: \"BENUTZERDEFINIERTE_TOOLTIP\" }\n      };\n      ext.extendLocalization(locales);\n    *  \n    * @param {object} locales The set of localized strings keyed by language\n    * @returns {boolean} True if localization was successfully updated\n    * @alias Autodesk.Viewing.Extension#extendLocalization\n    */\nExtension.prototype.extendLocalization = function (locales) {\n  return extendLocalization(locales);\n};\n\n\n/**\n    * Returns an object that persists throughout an extension's unload->load operation sequence. \n    * Cache object is kept by the {@link Autodesk.Viewing.Viewer3D} instance.\n    * Cache object lives only in RAM, there is no localStorage persistence.\n    * @returns {object} The cache object for a given extension.\n    * @alias Autodesk.Viewing.Extension#getCache\n    */\nExtension.prototype.getCache = function () {\n  if (!this.viewer.extensionCache) {\n    this.viewer.extensionCache = {};\n  }\n  var cache = this.viewer.extensionCache[this.id];\n  if (!cache) {\n    cache = this.viewer.extensionCache[this.id] = {};\n  }\n  return cache;\n};\n\n/**\n    * Invoked after the Toolbar UI gets created. Extensions can extend (or remove) its content from this point forward.\n    * The method is invoked after {@link TOOLBAR_CREATED_EVENT} gets fired. \n    * It is also invoked right after {@link Autodesk.Viewing.Extension#load} if the toolbar was already created.\n    *\n    * Must be overriden by subclasses.\n    *\n    * @param {Autodesk.Viewing.UI.ToolBar} toolbar - toolbar instance.\n    *\n    * @alias Autodesk.Viewing.Extension#onToolbarCreated\n    */\nExtension.prototype.onToolbarCreated = function (toolbar) {\n  // no content\n};\n\n\n//Have to export to the global namespace in order for class inheritance\n//for non-modular objects to work.\nif (typeof Autodesk !== \"undefined\") {\n  Autodesk.Viewing.Extension = Extension;\n}","function _slicedToArray(arr, i) {return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest();}function _nonIterableRest() {throw new TypeError(\"Invalid attempt to destructure non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\");}function _unsupportedIterableToArray(o, minLen) {if (!o) return;if (typeof o === \"string\") return _arrayLikeToArray(o, minLen);var n = Object.prototype.toString.call(o).slice(8, -1);if (n === \"Object\" && o.constructor) n = o.constructor.name;if (n === \"Map\" || n === \"Set\") return Array.from(o);if (n === \"Arguments\" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);}function _arrayLikeToArray(arr, len) {if (len == null || len > arr.length) len = arr.length;for (var i = 0, arr2 = new Array(len); i < len; i++) {arr2[i] = arr[i];}return arr2;}function _iterableToArrayLimit(arr, i) {if (typeof Symbol === \"undefined\" || !(Symbol.iterator in Object(arr))) return;var _arr = [];var _n = true;var _d = false;var _e = undefined;try {for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {_arr.push(_s.value);if (i && _arr.length === i) break;}} catch (err) {_d = true;_e = err;} finally {try {if (!_n && _i[\"return\"] != null) _i[\"return\"]();} finally {if (_d) throw _e;}}return _arr;}function _arrayWithHoles(arr) {if (Array.isArray(arr)) return arr;}function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}\nimport { logger } from \"../logger/Logger\";\nimport { theResourceLoader } from \"../resource-loader\";\nimport * as et from \"./EventTypes\";\nimport { analytics } from '../analytics';\n\n/**\n                                           * The ExtensionManager manages all the extensions available to the viewer.\n                                           * Register, retrieve, and unregister your extension using the singleton `Autodesk.Viewing.theExtensionManager`.\n                                           *\n                                           * You can load/unload your registered extension into a Viewer by invoking \n                                           * {@link #loadExtension|viewer.loadExtension(id, options)} and\t\n                                           * {@link #unloadExtension|viewer.unloadExtension(id)}, respectively.\t\n                                           * \t\n                                           * @memberof Autodesk.Viewing\n                                           * @alias Autodesk.Viewing.ExtensionManager\n                                           */var\nExtensionManager = /*#__PURE__*/function () {\n  /**\n                                              * @memberof Autodesk.Viewing\t\n                                              * @alias Autodesk.Viewing.ExtensionManager\t\n                                              * @constructor\t\n                                              */\n  function ExtensionManager() {_classCallCheck(this, ExtensionManager);\n    // map of extension id : { EXTENSION_CLASS, externalPathOrCallback, downloadPromise }\n    this.registeredExtensions = new Map();\n  }\n\n  /**\n     * Registers a new extension with the given id.\n     *\n     * @param {string} extensionId - The string id of the extension.\n     * @param {Extension} extensionClass - The Extension-derived class representing the extension.\n     * @returns {boolean} - True if the extension was successfully registered.\n     * @alias Autodesk.Viewing.ExtensionManager#registerExtension\n     */_createClass(ExtensionManager, [{ key: \"registerExtension\", value: function registerExtension(\n    extensionId, extensionClass) {\n      if (this.registeredExtensions.has(extensionId)) {\n        var extension = this.registeredExtensions.get(extensionId);\n\n        // extension.EXTENSION_CLASS will be present for built-in extension or\n        // if the extension has been downloaded and regisrered already\n        if (extension.EXTENSION_CLASS) {\n          return false;\n        } else {\n          // We will get here when the extension is downloaded and registered first time\n          extension.EXTENSION_CLASS = extensionClass;\n        }\n      } else {\n        this.registeredExtensions.set(extensionId, { EXTENSION_CLASS: extensionClass });\n      }\n      return true;\n    }\n\n    /**\n       * Returns the class representing the extension with the given id.\n       *\n       * @param {string} extensionId - The string id of the extension.\n       * @returns {Extension|null} - The Extension-derived class if one was registered; null otherwise.\n       * @alias Autodesk.Viewing.ExtensionManager#getExtension\n       */ }, { key: \"getExtensionClass\", value: function getExtensionClass(\n    extensionId) {\n      if (this.registeredExtensions.has(extensionId)) {\n        return this.registeredExtensions.get(extensionId).EXTENSION_CLASS;\n      }\n      return null;\n    }\n\n    /**\n       * Unregisters an existing extension with the given id.\n       *\n       * @param {string} extensionId - The string id of the extension.\n       * @returns {boolean} - True if the extension was successfully unregistered.\n       * @alias Autodesk.Viewing.ExtensionManager#unregisterExtension\n       */ }, { key: \"unregisterExtension\", value: function unregisterExtension(\n    extensionId) {\n      if (this.registeredExtensions.has(extensionId)) {\n        this.registeredExtensions.delete(extensionId);\n        return true;\n      }\n      return false;\n    }\n\n    /**\n       * Registers an extension that needs to be downloaded before using it.\n       * The Viewer ships with some extensions that are not bundled, but can be runtime-fetched.\n       *\n       * @param {string} extensionId - The string id of the extension.\n       * @param {string | function} urlPathOrCallback - The url from where it needs to be pulled from. Can be a relative or an absolute path.\n       *                                                Optionally, this can be a callback function that defers the loading to the client\n       *                                                application. Useful for webpack import style loading. Callback must return a promise\n       *                                                that resolves when loading is finished.\n       * @param {string[]} dependencies               - Optional list of extension IDs, whose bundles are needed before this extension can be built.\n       * @returns {boolean} - True if the extension was successfully registered.\n       * @alias Autodesk.Viewing.ExtensionManager#registerExternalExtension\n       */ }, { key: \"registerExternalExtension\", value: function registerExternalExtension(\n    extensionId, urlPathOrCallback, dependencies) {\n      if (this.registeredExtensions.has(extensionId)) {\n        return false;\n      }\n      // EXTENSION_CLASS will be null initially, and set to the class  \n      // after the extension is downloaded\n      this.registeredExtensions.set(extensionId, { EXTENSION_CLASS: null, externalPathOrCallback: urlPathOrCallback, dependencies: dependencies });\n      return true;\n    }\n\n\n    /**\n       * Returns the url path from where to download the extension; null if not registered through registerExternalExtension().\n       *\n       * @param {string} extensionId - The string id of the extension.\n       * @returns {url|null} - The url from where to download the extension; null if not download is needed.\n       * @alias Autodesk.Viewing.ExtensionManager#getExternalPath\n       */ }, { key: \"getExternalPath\", value: function getExternalPath(\n    extensionId) {\n      if (this.registeredExtensions.has(extensionId)) {\n        return this.registeredExtensions.get(extensionId).externalPathOrCallback;\n      }\n      return null;\n    }\n\n    /**\n       * Gets a list of all the extensions that are available for usage.\n       * Some are already available in memory, while others may require\n       * an additional file to be downloaded prior to its usage.\n       * @returns {string[]}\n       * @alias Autodesk.Viewing.ExtensionManager#getRegisteredExtensions\n       */ }, { key: \"getRegisteredExtensions\", value: function getRegisteredExtensions()\n    {\n      return Array.from(this.registeredExtensions).map(function (_ref) {var _ref2 = _slicedToArray(_ref, 2),key = _ref2[0],val = _ref2[1];return {\n          id: key,\n          inMemory: !!val.EXTENSION_CLASS,\n          isAsync: !!val.externalPathOrCallback };});\n\n    }\n\n    /**\n       * Download the extension and return its downloading promise\n       * @param {string} extensionId \n       * @returns {Promise} resolves when the extension class is ready for usage.\n       */ }, { key: \"downloadExtension\", value: function downloadExtension(\n    extensionId) {var _this = this;\n\n      if (!this.registeredExtensions.has(extensionId)) {\n        return Promise.reject('Extension not found: ' + extensionId + '. Has it been registered(1)?');\n      }\n\n      var extensionState = this.registeredExtensions.get(extensionId);\n\n      if (!extensionState.externalPathOrCallback) {\n        return Promise.reject('Extension not found: ' + extensionId + '. Has it been registered(2)?');\n      }\n\n      if (extensionState.downloadPromise) {\n        // extension download is in progess\n        return extensionState.downloadPromise;\n      }\n\n      // If the extension has dependencies, download the corresponding bundles first\n      var dependencies = extensionState.dependencies || [];\n      var dependencyLoads = dependencies.map(function (extId) {return _this.downloadExtension(extId);});\n      var dependencyPromise = Promise.all(dependencyLoads);\n\n      extensionState.downloadPromise = dependencyPromise.then(function () {\n        if (typeof extensionState.externalPathOrCallback === 'string') {// Create a new download\n          return theResourceLoader.loadScript(extensionState.externalPathOrCallback, extensionId);\n        } else {// A callback to download was provided, must return a promise\n          return extensionState.externalPathOrCallback();\n        }\n      }).then(function () {\n        // No longer need the promise\n        delete extensionState.downloadPromise;\n\n        if (!extensionState.EXTENSION_CLASS) {\n          // After downloading, the downloaded script would call\n          // theExtensionManager.registerExtension(), with the extension class\n          // Not having a class means the extension did not call registerExtension\n          throw new Error('Extension not found: ' + extensionId + '. Has it been registered(3)?');\n        }\n\n        // resolve with the extension class\n        return extensionState.EXTENSION_CLASS;\n      });\n\n      return extensionState.downloadPromise;\n    }\n\n    /**\n       * Iterates over each registered Extension class and invokes\n       * static method 'populateDefaultOptions' if available.\n       * \n       * The objective is to gather all supported configuration options\n       * across all extensions.\n       * @private\n       */ }, { key: \"popuplateOptions\", value: function popuplateOptions(\n    options) {\n      this.registeredExtensions.forEach(function (ext) {\n        ext.EXTENSION_CLASS.populateDefaultOptions(options);\n      });\n    }\n\n    /**\n       * Is the extension being downloaded?\n       * @param {string} extensionId \n       */ }, { key: \"isDownloading\", value: function isDownloading(\n    extensionId) {\n      if (this.registeredExtensions.has(extensionId)) {\n        return !!this.registeredExtensions.get(extensionId).downloadPromise;\n      }\n      return false;\n    }\n\n    /**\n       * Is the extension class available?\n       * @param {string} extensionId \n       */ }, { key: \"isAvailable\", value: function isAvailable(\n    extensionId) {\n      return !!this.getExtensionClass(extensionId);\n    } }]);return ExtensionManager;}();\n\n\n\nexport var theExtensionManager = new ExtensionManager();\n\n/***\n                                                          * Augments a class by extension load/unload functionality.\n                                                          */\nexport var ExtensionMixin = function ExtensionMixin() {};\n\nExtensionMixin.prototype = {\n\n  /**\n                              * Loads the extension with the given id and options.\n                              *\n                              * @memberof! Autodesk.Viewing.Viewer3D#\n                              * @param {string} extensionId - The string id of the extension.\n                              * @param {Object} options - An optional dictionary of options.\n                              *\n                              * @returns {Promise} - Resolves with the extension requested.\n                              */\n  loadExtension: function loadExtension(extensionId, options) {var _this2 = this;\n    // map of extensionId : instance\n    this.loadedExtensions = this.loadedExtensions || {};\n\n\n    // Is the extension registered and the extension\n    // constructor available?\n    if (theExtensionManager.isAvailable(extensionId)) {\n      return this.loadExtensionLocal(extensionId, options);\n    }\n\n    // requires download\n    this.loadExtensionPromises = this.loadExtensionPromises || {};\n    if (extensionId in this.loadExtensionPromises) {\n      return this.loadExtensionPromises[extensionId];\n    }\n\n    this.loadExtensionPromises[extensionId] = theExtensionManager.downloadExtension(extensionId).then(function () {\n\n      // Don't need the downloading promise anymore\n      delete _this2.loadExtensionPromises[extensionId];\n\n      // Abort if a teardown is in progress\n      if (!_this2.loadedExtensions) {\n        logger.info(\"Abort loadExtension('\".concat(extensionId, \"') - teardown in progress\"));\n        return; // This is not considered an error\n      }\n\n      // user unloaded an extension while download is in progress\n      if (_this2.cancelledExtensions && extensionId in _this2.cancelledExtensions) {\n        delete _this2.cancelledExtensions[extensionId];\n        throw new Error(\"Abort loadExtension('\".concat(extensionId, \"') - extension has been unloaded\"));\n      }\n\n      return _this2.loadExtensionLocal(extensionId, options);\n    });\n\n    return this.loadExtensionPromises[extensionId];\n  },\n\n  /**\n      * Returns the loaded extension.\n      * @memberof! Autodesk.Viewing.Viewer3D#\n      * @param {string} extensionId - The string id of the extension.\n      * @param {function} [callback] - That receives an extension instance as argument.\n      * @returns {?Object} - Extension.\n      */\n  getExtension: function getExtension(extensionId, callback) {\n    var ext = this.loadedExtensions && extensionId in this.loadedExtensions ? this.loadedExtensions[extensionId] : null;\n    if (ext && callback) {\n      callback(ext);\n    }\n    return ext;\n  },\n\n  /**\n      * Returns a promise with the loaded extension.\n      * @memberof! Autodesk.Viewing.Viewer3D#\n      * @param {string} extensionId - The string id of the extension.\n      * @returns {Promise} - Resolves with the loaded extension.\n      */\n  getExtensionAsync: function getExtensionAsync(extensionId) {var _this3 = this;\n    var extension = this.getExtension(extensionId);\n\n    if (extension) {\n      return Promise.resolve(extension);\n    } else {\n      return new Promise(function (resolve) {\n        _this3.addEventListener(et.EXTENSION_LOADED_EVENT, function onExtensionLoaded(event) {\n          if (event.extensionId === extensionId) {\n            this.removeEventListener(et.EXTENSION_LOADED_EVENT, onExtensionLoaded);\n            extension = this.getExtension(extensionId);\n            resolve(extension);\n          }\n        });\n      });\n    }\n  },\n\n  /**\n      * Unloads the extension with the given id.\n      *\n      * @memberof! Autodesk.Viewing.Viewer3D#\n      * @param {string} extensionId - The string id of the extension.\n      * @returns {boolean} - True if the extension was successfully unloaded.\n      */\n  unloadExtension: function unloadExtension(extensionId) {\n    this.cancelledExtensions = this.cancelledExtensions || {};\n    if (theExtensionManager.isDownloading(extensionId)) {\n      // cancel mid download\n      this.cancelledExtensions[extensionId] = true;\n      return false;\n    }\n\n    var success = false;\n    var ext = this.getExtension(extensionId);\n\n    if (ext) {\n      success = ext.unload();\n      logger.info('Extension unloaded: ' + extensionId);\n      delete this.loadedExtensions[extensionId];\n\n      analytics.track('viewer.extensionManager.extensionUnloaded', {\n        extensionId: extensionId });\n\n\n      this.dispatchEvent({ type: et.EXTENSION_UNLOADED_EVENT, extensionId: extensionId });\n    } else {\n      logger.warn('Extension not found: ' + extensionId);\n    }\n\n    return success;\n  },\n\n\n  /**\n      * Loads the extension with the given id and options.\n      * For internal use only.\n      *\n      * @memberof! Autodesk.Viewing.Viewer3D#\n      * @param {string} extensionId - The string id of the extension.\n      * @param {Object} options - An optional dictionary of options.\n      *\n      * @returns {Promise} - Resolves with the extension requested.\n      */\n  loadExtensionLocal: function loadExtensionLocal(extensionId, options) {var _this4 = this;\n    // Instantiate the extension\n    var EXTENSION_CLASS = theExtensionManager.getExtensionClass(extensionId);\n    if (!EXTENSION_CLASS) {\n      return Promise.reject('Extension not found : ' + extensionId);\n    }\n\n    // Extension already loaded?\n    var extension = this.getExtension(extensionId);\n    if (extension) {\n      return Promise.resolve(extension);\n    }\n\n    // Is an extension with async load in progress?\n    if (this.loadingExtensions && extensionId in this.loadingExtensions) {\n      return this.loadingExtensions[extensionId];\n    }\n\n    // Create a new one\n    extension = new EXTENSION_CLASS(this, options);\n    extension.id = extensionId;\n\n    var loadResult = extension.load();\n    if (!loadResult) {\n      return Promise.reject('Extension failed to .load() : ' + extensionId);\n    }\n\n    var onSuccess = function onSuccess() {\n      _this4.loadedExtensions[extensionId] = extension;\n      _this4.onPostExtensionLoad(extension);\n      logger.info('Extension loaded: ' + extensionId);\n\n      analytics.track('viewer.extensionManager.extensionLoaded', {\n        extensionId: extensionId });\n\n\n      //Queue the extension loaded event, but do not notify immediately.\n      //This is because the event handler can try to unload the extension being loaded,\n      //which will make the return logic below confused.\n      setImmediate(function () {\n        if (_this4.getExtension(extensionId)) {\n          _this4.dispatchEvent({ type: et.EXTENSION_LOADED_EVENT, extensionId: extensionId });\n        }\n      });\n    };\n\n    if (loadResult instanceof Promise) {\n      // We need to know if there is already an async extension load in progress\n      this.loadingExtensions = this.loadingExtensions || {};\n      this.loadingExtensions[extensionId] = loadResult.then(function () {\n        onSuccess();\n        return extension;\n      }).finally(function () {\n        // Extension load eirther succeded or failed\n        delete _this4.loadingExtensions[extensionId];\n      });\n\n      return this.loadingExtensions[extensionId];\n    } else {\n      //In case success is not a Promise but a truthy value,\n      //set the extension immediately into the loadedExtensions map,\n      //in order to support backwards compatibility with callers who do not\n      //wait on the returned Promise but try to use the extension immediately after loadExtension returns.\n      onSuccess();\n      return Promise.resolve(extension);\n    }\n\n  },\n\n  /**\n      * Virtual method that hooks into the extension's loading process.\n      * Gets invoked after {@link Autodesk.Viewing.Extension#load|extension.load()} \n      * but before event `EXTENSION_LOADED_EVENT` gets fired.\n      *\n      * @virtual\n      */\n  onPostExtensionLoad: function onPostExtensionLoad(extension) {\n    // virtual method //\n  },\n\n  /**\n      * Iterate over each extension that has been successfully loaded and invokes a callback function for them.\n      * @param {function} callback - That receives an extension instance as argument.\n      *\n      * @example\n      *    forEachExtension(function(ext){\n      *       console.log(ext.id);\n      *    })\n      *\n      * @memberof! Autodesk.Viewing.Viewer3D#\n      */\n  forEachExtension: function forEachExtension(callback) {\n    var loadedIds = this.loadedExtensions || {};\n    for (var id in loadedIds) {\n      if (loadedIds.hasOwnProperty(id)) {\n        callback(loadedIds[id]);\n      }\n    }\n  },\n\n\n  apply: function apply(object) {\n\n    var me = ExtensionMixin.prototype;\n\n    object.loadExtension = me.loadExtension;\n    object.getExtension = me.getExtension;\n    object.getExtensionAsync = me.getExtensionAsync;\n    object.unloadExtension = me.unloadExtension;\n    object.loadExtensionLocal = me.loadExtensionLocal;\n    object.forEachExtension = me.forEachExtension;\n    object.onPostExtensionLoad = me.onPostExtensionLoad;\n\n  } };","\n/**\n * Base class for file loaders.\n *\n * It is highly recommended that file loaders use worker threads to perform the actual loading in order to keep the\n * UI thread free. Once loading is complete, the loader should call viewer.impl.onLoadComplete(). During loading,\n * the loader can use viewer.impl.signalProgress(int) to indicate how far along the process is.\n *\n * To add geometry to the viewer, `viewer.impl.addMeshInstance(geometry, meshId, materialId, matrix)` should be used.\n * Geometry must be THREE.BufferGeometry, meshId is a number, materialId is a string, and matrix is the THREE.Matrix4\n * transformation matrix to be applied to the geometry.\n *\n * Remember to add draw calls to the BufferGeometry if the geometry has more than 65535 faces.\n *\n * @param {Autodesk.Viewing.Viewer3D} viewer - The viewer instance.\n * @constructor\n * @class\n * @abstract\n * @alias Autodesk.Viewing.FileLoader\n */\nexport function FileLoader(viewer) {\n  this.viewer = viewer;\n};\n\nFileLoader.prototype.constructor = FileLoader;\n\n/**\n                                                * Initiates the loading of a file from the given URL.\n                                                *\n                                                * This method must be overridden.\n                                                *\n                                                * @param {string} url - The url for the file.\n                                                * @param {object=} options - An optional dictionary of options.\n                                                * @param {string=} options.ids - A list of object id to load.\n                                                * @param {string=} options.sharedPropertyDbPath - Optional path to shared property database.\n                                                * @param {function=} onSuccess - Callback function when the file begins loading successfully. Takes no arguments.\n                                                * @param {function=} onError - Callback function when an error occurs. Passed an integer error code and a string description of the error.\n                                                *\n                                                * @alias Autodesk.Viewing.FileLoader#loadFile\n                                                */\nFileLoader.prototype.loadFile = function (url, options, onSuccess, onError) {\n  return false;\n};\n\n/**\n    * Returns true only for a 3D models FileLoader implementation.\n    *\n    * @alias Autodesk.Viewing.FileLoader#is3d\n    */\nFileLoader.prototype.is3d = function () {\n  return false;\n};","\n\"use strict\";\n\n/**\n               * The FileLoaderManager manages a set of file loaders available to the viewer.\n               * Register, retrieve, and unregister your file loaders using the singleton theFileLoader.\n               * @private\n               */\nvar fileLoaders = {};\n\n/**\n                       * Registers a new file loader with the given id.\n                       *\n                       * @param {String} fileLoaderId - The string id of the file loader.\n                       * @param {String[]} fileExtensions - The array of supported file extensions. Ex: ['stl', 'obj']\n                       * @param {Function} fileLoaderClass - The file loader constructor.\n                       * @returns {Boolean} - True if the file loader was successfully registered.\n                       * \n                       * @private\n                       */\nfunction registerFileLoader(fileLoaderId, fileExtensions, fileLoaderClass) {\n  if (!fileLoaders[fileLoaderId]) {\n    fileLoaders[fileLoaderId] = {\n      loader: fileLoaderClass,\n      extensions: fileExtensions };\n\n    return true;\n  }\n  return false;\n}\n\n/**\n   * Returns the file loader for a given ID.\n   *\n   * @param {String} fileLoaderId - The string id of the file loader.\n   * @returns {Function?} - The file loader constructor if one was registered; null otherwise.\n   * \n   * @private\n   */\nfunction getFileLoader(fileLoaderId) {\n  if (fileLoaders[fileLoaderId]) {\n    return fileLoaders[fileLoaderId].loader;\n  }\n  return null;\n}\n\n/**\n   * Unregisters an existing file loader with the given id.\n   *\n   * @param {String} fileLoaderId - The string id of the file loader.\n   * @returns {Boolean} - True if the file loader was successfully unregistered.\n   * \n   * @private\n   */\nfunction unregisterFileLoader(fileLoaderId) {\n  if (fileLoaders[fileLoaderId]) {\n    delete fileLoaders[fileLoaderId];\n    return true;\n  }\n  return false;\n}\n\n/**\n   * Returns a file loader that supports the given extension.\n   *\n   * @param {String} fileExtension - The file extension.\n   *\n   * @returns {Function?} - The file loader constructor if one is found; null otherwise.\n   * \n   * @private\n   */\nfunction getFileLoaderForExtension(fileExtension) {\n  fileExtension = fileExtension ? fileExtension.toLowerCase() : \"\";\n  for (var fileLoaderId in fileLoaders) {\n    var fileLoader = fileLoaders[fileLoaderId];\n    if (fileLoader) {\n      for (var i = 0; i < fileLoader.extensions.length; i++) {\n        if (fileLoader.extensions[i].toLowerCase() === fileExtension) {\n          return fileLoader.loader;\n        }\n      }\n    }\n  }\n\n  return null;\n}\n\nexport var FileLoaderManager = {\n  registerFileLoader: registerFileLoader,\n  getFileLoader: getFileLoader,\n  getFileLoaderForExtension: getFileLoaderForExtension,\n  unregisterFileLoader: unregisterFileLoader };","function _createForOfIteratorHelper(o, allowArrayLike) {var it;if (typeof Symbol === \"undefined\" || o[Symbol.iterator] == null) {if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === \"number\") {if (it) o = it;var i = 0;var F = function F() {};return { s: F, n: function n() {if (i >= o.length) return { done: true };return { done: false, value: o[i++] };}, e: function e(_e) {throw _e;}, f: F };}throw new TypeError(\"Invalid attempt to iterate non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\");}var normalCompletion = true,didErr = false,err;return { s: function s() {it = o[Symbol.iterator]();}, n: function n() {var step = it.next();normalCompletion = step.done;return step;}, e: function e(_e2) {didErr = true;err = _e2;}, f: function f() {try {if (!normalCompletion && it.return != null) it.return();} finally {if (didErr) throw err;}} };}function _unsupportedIterableToArray(o, minLen) {if (!o) return;if (typeof o === \"string\") return _arrayLikeToArray(o, minLen);var n = Object.prototype.toString.call(o).slice(8, -1);if (n === \"Object\" && o.constructor) n = o.constructor.name;if (n === \"Map\" || n === \"Set\") return Array.from(o);if (n === \"Arguments\" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);}function _arrayLikeToArray(arr, len) {if (len == null || len > arr.length) len = arr.length;for (var i = 0, arr2 = new Array(len); i < len; i++) {arr2[i] = arr[i];}return arr2;}function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}import { GlobalManagerMixin } from './GlobalManagerMixin';\nvar FADE_DURATION = 416; // This value came from the hig component\nvar CYCLE_DURATION = 1000; // This value came from the hig componen\n\nvar NUM_SIDES = 10; // Number of sides for the loading polygon spinner\nvar SIZE = 72;\nvar THICKNESS = 6.75;\n\nvar SPINNER_SCALE = 0.5;\nexport var ForgeLogoSpinner = /*#__PURE__*/function () {\n  function ForgeLogoSpinner(viewer) {_classCallCheck(this, ForgeLogoSpinner);\n    this.viewer = viewer;\n    this.setGlobalManager(this.viewer.globalManager);\n    this.domElement = null;\n    this._step = this._step.bind(this);\n  }_createClass(ForgeLogoSpinner, [{ key: \"createDom\", value: function createDom(\n\n    container) {var _this = this;\n      var _document = this.getDocument();\n      this.domElement = _document.createElement('div');\n      this.domElement.className = 'forge-spinner';\n      this._initTransform = \"translate(-50%, -50%) scale(\".concat(SPINNER_SCALE, \")\");\n      this.domElement.style.transform = this._initTransform.slice();\n      var svg = this._createSvgElement('svg');\n      svg.setAttribute('width', '242');\n      svg.setAttribute('height', '242');\n      svg.setAttribute('viewBox', \"0 0 \".concat(SIZE, \" \").concat(SIZE));\n      svg.setAttributeNS('http://www.w3.org/2000/xmlns/', 'xmlns:xlink', 'http://www.w3.org/1999/xlink');\n      this.domElement.appendChild(svg);\n\n      // Create the outer and inner polygon points\n      var data = this._createWheelPointData(NUM_SIDES, SIZE, THICKNESS);\n\n      this._createMask(data);\n\n      // Add the first polygon to the svg. This is the same as the outer polygon in the image mask\n      var firstPolygon = this._createSvgElement('polygon');\n      firstPolygon.setAttribute('mask', 'url(#mask)');\n      svg.appendChild(firstPolygon);\n      this._addPoints(data.outerPoints, firstPolygon);\n\n      // Create the colored segments. There will be 2 * NUM_SIDES number of segments\n      this._createSegments(data);\n\n      var img = _document.createElement('img');\n      img.src = Autodesk.Viewing.Private.getResourceUrl('res/ui/forge-logo.png');\n      var that = this;\n      this._onResize = this._onResize.bind(this);\n      // Add the resize event listener once the forge logo image is loaded.\n      img.onload = function () {\n        // Initial resize when the forge logo png is loaded.\n        // The _onResize method requires the bounding box of the spinner wrapper\n        _this._onResize();\n        _this._initResize = true;\n        _this.viewer.addEventListener(Autodesk.Viewing.VIEWER_RESIZE_EVENT, _this._onResize);\n      };\n      this.domElement.appendChild(img);\n      container && container.appendChild(this.domElement);\n      this.domElement.style.display = 'none';\n\n      return this.domElement;\n    }\n\n    /**\n       * Creates a svg element.\n       * @param {String} tag - element tag\n       * @private\n       */ }, { key: \"_createSvgElement\", value: function _createSvgElement(\n    tag) {\n      var _document = this.getDocument();\n      return _document.createElementNS('http://www.w3.org/2000/svg', tag);\n    }\n\n    /**\n       * Returns the SVG element\n       * @private\n       */ }, { key: \"_getSvg\", value: function _getSvg()\n    {\n      return this === null || this === void 0 ? void 0 : this.domElement.getElementsByTagNameNS('http://www.w3.org/2000/svg', 'svg')[0];\n    }\n\n    /**\n       * Creates an SVG mask for the polygon progress wheel. This will make the inner polygon transparent.\n       * @param {*} data\n       * @private\n       */ }, { key: \"_createMask\", value: function _createMask(\n    data) {\n      var svg = this._getSvg();\n      var defs = this._createSvgElement('defs');\n      var mask = this._createSvgElement('mask');\n      mask.id = 'mask';\n\n      defs.appendChild(mask);\n      svg.appendChild(defs);\n      // Create the outer polygon for the mask\n      var polygon = this._createSvgElement('polygon');\n      polygon.style['opacity'] = 0.15;\n      polygon.style['fill'] = '#FFF';\n      mask.appendChild(polygon);\n      this._addPoints(data.outerPoints, polygon);\n\n      // Create the inner polygon for the mask\n      var endPolygon = this._createSvgElement('polygon');\n      mask.appendChild(endPolygon);\n      this._addPoints(data.innerPoints, endPolygon);\n    }\n\n    /**\n       * Animation function\n       * @param {Number} timestamp\n       * @private\n       */ }, { key: \"_step\", value: function _step(\n    timestamp) {\n      if (!this.startTime) this.startTime = timestamp;\n      var elapsed = timestamp - this.startTime;\n      var elapsedThisCycle = elapsed % CYCLE_DURATION;\n\n      this._setSegmentOpacities(elapsedThisCycle);\n      var _window = this.getWindow();\n\n      this._animId = _window.requestAnimationFrame(this._step);\n    } }, { key: \"_stop\", value: function _stop()\n\n    {\n      if (this._animId) {\n        // Stop the animation\n        var _window = this.getWindow();\n        _window.cancelAnimationFrame(this._animId);\n        this._animId = null;\n      }\n    }\n\n    /**\n       * Set the opacity of the triangular segments\n       * @param {*} elapsedThisCycle\n       * @private\n       */ }, { key: \"_setSegmentOpacities\", value: function _setSegmentOpacities(\n    elapsedThisCycle) {var _this2 = this;\n      this.segments.forEach(function (segment, i) {\n        var index = Math.abs(i - _this2.segments.length) - 1;\n        var eachSegment = segment;\n\n        eachSegment.style.opacity = _this2._getSegmentOpacity(index, elapsedThisCycle);\n      });\n    }\n\n    /**\n       * Calculate the segment's opacity value\n       * @param {*} index\n       * @param {*} elapsedThisCycle\n       * @private\n       */ }, { key: \"_getSegmentOpacity\", value: function _getSegmentOpacity(\n    index, elapsedThisCycle) {\n      var segmentFadeStartTime = index * (CYCLE_DURATION / this.segments.length);\n\n      // Fade continuing from previous cycle\n      if (segmentFadeStartTime + FADE_DURATION > CYCLE_DURATION && elapsedThisCycle < FADE_DURATION) {\n        return ((elapsedThisCycle + CYCLE_DURATION - segmentFadeStartTime) / FADE_DURATION - 1) * -1;\n      }\n\n      // Fade has finished\n      if (elapsedThisCycle < segmentFadeStartTime || elapsedThisCycle > segmentFadeStartTime + FADE_DURATION) {\n        return 0;\n      }\n\n      // Fading\n      return Math.abs((elapsedThisCycle - segmentFadeStartTime) / FADE_DURATION - 1);\n    }\n\n    /**\n       * Returns an array of segement elements.\n       * @private\n       */ }, { key: \"_getSegments\", value: function _getSegments()\n    {\n      return Array.from(this.domElement.querySelectorAll('.segment'));\n    }\n\n    /**\n       * Adds points to the supplied polygon\n       * @param {Number[][]} points - Matrix of points\n       * @param {SVGPolygonElement} polygon - polygon element\n       * @private\n       */ }, { key: \"_addPoints\", value: function _addPoints(\n    points, polygon) {var _iterator = _createForOfIteratorHelper(\n      points),_step2;try {for (_iterator.s(); !(_step2 = _iterator.n()).done;) {var value = _step2.value;\n          var svg = this._getSvg();\n          var point = svg.createSVGPoint();\n          point.x = value[0];\n          point.y = value[1];\n          polygon.points.appendItem(point);\n        }} catch (err) {_iterator.e(err);} finally {_iterator.f();}\n    }\n\n    /**\n       * Creates a polygon with numSides, size and thickness of the polygon.\n       * @param {Number} numSides\n       * @param {Number} size\n       * @param {Number} thickness\n       * @returns {Object} - data object containing the outerPolygon and innerPolygon points.\n       * @private\n       */ }, { key: \"_createWheelPointData\", value: function _createWheelPointData(\n    numSides, size) {var thickness = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 5;\n      var center = size / 2;\n      var Xcenter = size / 2;\n      var Ycenter = size / 2;\n      var data = { outerPoints: [], innerPoints: [] };\n      for (var i = 1; i <= numSides; i++) {\n        data.outerPoints.push([\n        Xcenter + center * Math.cos(i * 2 * Math.PI / numSides),\n        Ycenter + center * Math.sin(i * 2 * Math.PI / numSides)]);\n\n\n        data.innerPoints.push([\n        Xcenter + (center - thickness) * Math.cos(i * 2 * Math.PI / numSides),\n        Ycenter + (center - thickness) * Math.sin(i * 2 * Math.PI / numSides)]);\n\n      }\n      return data;\n    }\n\n    /**\n       * Creates colored triangles inside of the wheel polygon\n       * @param {Object} data - returned value from _createWheelPointData\n       * @private\n       */ }, { key: \"_createSegments\", value: function _createSegments(\n    data) {var _this3 = this;var\n      outerPoints = data.outerPoints,innerPoints = data.innerPoints;\n      var svg = this._getSvg();\n      var createSegmentPolygon = function createSegmentPolygon(points, cssClass) {\n        var polygon = _this3._createSvgElement('polygon');\n        addClass(polygon, 'segment');\n        addClass(polygon, cssClass);\n        _this3._addPoints(points, polygon);\n        svg.appendChild(polygon);\n      };\n\n      // Iterate over the polygons points and create two triangles for each polygon side.\n      for (var i = outerPoints.length - 1; i >= 0; --i) {\n        var p1 = outerPoints[i],\n        p2 = outerPoints[i - 1],\n        p3 = innerPoints[i],\n        p4 = innerPoints[i - 1];\n\n        if (i === 0) {\n          p2 = outerPoints[outerPoints.length - 1];\n          p4 = innerPoints[outerPoints.length - 1];\n        }\n\n        createSegmentPolygon([p1, p2, p3], 'light-blue');\n        createSegmentPolygon([p3, p4, p2], 'dark-blue');\n      }\n    }\n\n    /**\n       * Fade the domElement out.\n       * @private\n       */ }, { key: \"_fadeOut\", value: function _fadeOut()\n    {var _this4 = this;\n      var opacity = 1; // initial opacity\n      var timer = setInterval(function () {var _this4$domElement;\n        if (!((_this4$domElement = _this4.domElement) === null || _this4$domElement === void 0 ? void 0 : _this4$domElement.style)) {\n          clearInterval(timer);\n          return;\n        }\n\n        if (opacity <= 0.1) {\n          clearInterval(timer);\n          _this4.domElement.style.display = 'none';\n        }\n        _this4.domElement.style.opacity = opacity;\n        opacity -= opacity * 0.1;\n      }, 1);\n    } }, { key: \"show\", value: function show()\n\n    {\n      if (this.domElement) {\n        this.domElement.style.display = 'block';\n        this.domElement.style.opacity = 1;\n        this.segments = this._getSegments();\n        this._step(1);\n      }\n    } }, { key: \"hide\", value: function hide()\n\n    {var _this5 = this;\n      if (this.domElement) {\n        this._hide = function (event) {\n          // Stop the spinner\n          _this5._stop();\n          if (event.model.is3d()) {\n            // Fade the spinner out\n            _this5._fadeOut();\n          } else {\n            // For 2d, the model is loaded right away.\n            _this5.domElement.style.opacity = 0;\n            _this5.domElement.style.display = 'none';\n          }\n        };\n\n        var models = this.viewer.impl.modelQueue().getModels();\n        if (models.length === 0) {\n          // Add an event listener\n          this.viewer.addEventListener(Autodesk.Viewing.MODEL_ADDED_EVENT, this._hide, { once: true });\n        } else {\n          this._hide({ model: models[0] });\n        }\n      }\n    } }, { key: \"destroy\", value: function destroy()\n\n    {\n      if (this.domElement.parentElement) {\n        this.domElement.parentElement.removeChild(this.domElement);\n      }\n      this.domElement = null;\n      this.viewer.removeEventListener(Autodesk.Viewing.VIEWER_RESIZE_EVENT, this._onResize);\n    } }, { key: \"_onResize\", value: function _onResize()\n\n    {var _this$domElement, _this$domElement$styl;\n      if (this._initResize) {\n        this._initResize = false;\n        return;\n      }\n      var spinner = this.domElement;\n      if (!spinner) return;\n\n      // Do not calculate the scale when the spinner is not visible\n      if (spinner.style.display == 'none') return;\n\n      var parent = spinner.parentElement;\n      if (!parent) return;\n\n      var parentBB = parent.getBoundingClientRect();\n      var spinnerBB = spinner.getBoundingClientRect();\n\n      var tolerance = Math.max(spinnerBB.width / parentBB.width, (spinnerBB.height + 350) / parentBB.height);\n\n      var transform = (_this$domElement = this.domElement) === null || _this$domElement === void 0 ? void 0 : (_this$domElement$styl = _this$domElement.style) === null || _this$domElement$styl === void 0 ? void 0 : _this$domElement$styl.transform;\n      if (!transform) return;\n\n      if (tolerance > 0.8) {\n        var regex = /[-+]?scale\\(\\d*\\.\\d+|\\d+\\)/;\n        var scale = regex.exec(transform);\n        // Check if the scale is present\n        if (scale.length > 0) {\n          var val = scale[0].split('scale(')[1];\n          var newScale = Number((val / tolerance).toFixed(4));\n          var newTransform = transform.replace(regex, \"scale(\".concat(newScale));\n          // Only apply the transform if it is not the same and if the new scale is less than the original scale\n          if (newTransform != this.domElement.style.transform && newScale <= SPINNER_SCALE && newScale > 0.2) {\n            this.domElement.style.transform = newTransform;\n          }\n        }\n      } else if (this.domElement.style.transform != this._initTransform) {\n        this.domElement.style.transform = this._initTransform;\n      }\n    } }]);return ForgeLogoSpinner;}();\n\n\nfunction addClass(elm, cssClass) {\n  if (!!elm.classList) {\n    elm.classList.add(cssClass);\n  } else {\n    // https://caniuse.com/#search=classList\n    // IE11 does not implement classList on <svg>\n    var appliedClasses = elm.getAttribute('class') || '';\n    appliedClasses = !appliedClasses.split(' ').includes(cssClass) ? \"\".concat(\n    appliedClasses, \" \").concat(cssClass) :\n    appliedClasses;\n    elm.setAttribute('class', appliedClasses);\n  }\n}\n\nGlobalManagerMixin.call(ForgeLogoSpinner.prototype);","function _toConsumableArray(arr) {return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread();}function _nonIterableSpread() {throw new TypeError(\"Invalid attempt to spread non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\");}function _iterableToArray(iter) {if (typeof Symbol !== \"undefined\" && Symbol.iterator in Object(iter)) return Array.from(iter);}function _arrayWithoutHoles(arr) {if (Array.isArray(arr)) return _arrayLikeToArray(arr);}function _slicedToArray(arr, i) {return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest();}function _nonIterableRest() {throw new TypeError(\"Invalid attempt to destructure non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\");}function _iterableToArrayLimit(arr, i) {if (typeof Symbol === \"undefined\" || !(Symbol.iterator in Object(arr))) return;var _arr = [];var _n = true;var _d = false;var _e = undefined;try {for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {_arr.push(_s.value);if (i && _arr.length === i) break;}} catch (err) {_d = true;_e = err;} finally {try {if (!_n && _i[\"return\"] != null) _i[\"return\"]();} finally {if (_d) throw _e;}}return _arr;}function _arrayWithHoles(arr) {if (Array.isArray(arr)) return arr;}function _createForOfIteratorHelper(o, allowArrayLike) {var it;if (typeof Symbol === \"undefined\" || o[Symbol.iterator] == null) {if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === \"number\") {if (it) o = it;var i = 0;var F = function F() {};return { s: F, n: function n() {if (i >= o.length) return { done: true };return { done: false, value: o[i++] };}, e: function e(_e2) {throw _e2;}, f: F };}throw new TypeError(\"Invalid attempt to iterate non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\");}var normalCompletion = true,didErr = false,err;return { s: function s() {it = o[Symbol.iterator]();}, n: function n() {var step = it.next();normalCompletion = step.done;return step;}, e: function e(_e3) {didErr = true;err = _e3;}, f: function f() {try {if (!normalCompletion && it.return != null) it.return();} finally {if (didErr) throw err;}} };}function _unsupportedIterableToArray(o, minLen) {if (!o) return;if (typeof o === \"string\") return _arrayLikeToArray(o, minLen);var n = Object.prototype.toString.call(o).slice(8, -1);if (n === \"Object\" && o.constructor) n = o.constructor.name;if (n === \"Map\" || n === \"Set\") return Array.from(o);if (n === \"Arguments\" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);}function _arrayLikeToArray(arr, len) {if (len == null || len > arr.length) len = arr.length;for (var i = 0, arr2 = new Array(len); i < len; i++) {arr2[i] = arr[i];}return arr2;}function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}var av = Autodesk.Viewing;\n\n/**\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              * Class that provides the window and document for each viewer instance.\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              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                                                                                                                                                                                                                                                                                                                                                                                                                                                                          */var\nGlobalManager = /*#__PURE__*/function () {\n\n  function GlobalManager() {_classCallCheck(this, GlobalManager);\n    this._window = { inner: null, registeredEventListeners: new Map() };\n    this._document = { inner: null, registeredEventListeners: new Map() };\n\n    // initialize\n    this._window.inner = av.getGlobal(); // start of with global window\n    this._document.inner = this._window.inner.document;\n\n    // Event listener wrappers\n    this.addWindowEventListener = addEventListener.bind(this._window);\n    this.removeWindowEventListener = removeEventListener.bind(this._window);\n    this.addDocumentEventListener = addEventListener.bind(this._document);\n    this.removeDocumentEventListener = removeEventListener.bind(this._document);\n  }\n\n  /**\n     * Get the current window\n     */_createClass(GlobalManager, [{ key: \"getWindow\", value: function getWindow()\n    {\n      return this._window.inner;\n    }\n\n    /**\n       * Get the current document\n       */ }, { key: \"getDocument\", value: function getDocument()\n    {\n      return this._document.inner;\n    }\n\n    /** \n       * Set the new window\n       * \n       * @param {object} - new window\n       */ }, { key: \"setWindow\", value: function setWindow(\n    obj) {\n      if (!obj || obj === this._window.inner) {\n        return;\n      }\n\n      // Re-register event listeners in the new global context\n      var _iterator = _createForOfIteratorHelper(this._window.registeredEventListeners.entries()),_step;try {for (_iterator.s(); !(_step = _iterator.n()).done;) {var _step$value = _slicedToArray(_step.value, 2),type = _step$value[0],listeners = _step$value[1];var _iterator3 = _createForOfIteratorHelper(\n          listeners.entries()),_step3;try {for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {var _this$_window$inner;var _step3$value = _slicedToArray(_step3.value, 2),listener = _step3$value[0],options = _step3$value[1];\n              obj.addEventListener.apply(obj, [type, listener].concat(_toConsumableArray(options)));\n              (_this$_window$inner = this._window.inner).removeEventListener.apply(_this$_window$inner, [type, listener].concat(_toConsumableArray(options)));\n            }} catch (err) {_iterator3.e(err);} finally {_iterator3.f();}\n        }} catch (err) {_iterator.e(err);} finally {_iterator.f();}var _iterator2 = _createForOfIteratorHelper(\n      this._document.registeredEventListeners.entries()),_step2;try {for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {var _step2$value = _slicedToArray(_step2.value, 2),_type = _step2$value[0],_listeners = _step2$value[1];var _iterator4 = _createForOfIteratorHelper(\n          _listeners.entries()),_step4;try {for (_iterator4.s(); !(_step4 = _iterator4.n()).done;) {var _obj$document, _this$_document$inner;var _step4$value = _slicedToArray(_step4.value, 2),_listener = _step4$value[0],_options = _step4$value[1];\n              (_obj$document = obj.document).addEventListener.apply(_obj$document, [_type, _listener].concat(_toConsumableArray(_options)));\n              (_this$_document$inner = this._document.inner).removeEventListener.apply(_this$_document$inner, [_type, _listener].concat(_toConsumableArray(_options)));\n            }} catch (err) {_iterator4.e(err);} finally {_iterator4.f();}\n        }} catch (err) {_iterator2.e(err);} finally {_iterator2.f();}\n\n      this._window.inner = obj;\n      this._document.inner = obj.document;\n    } }]);return GlobalManager;}();\n\n\n\n/**\n                                     * Returns if a window was created using window.open()\n                                     * @param {*} cWindow \n                                     * @private\n                                     */\nfunction isChild(cWindow) {\n  return !!cWindow.opener;\n}\n\n/**\n   * Helper method that saves the registered event handlers\n   * and calls the same method on the inner object\n   * @private\n   */\nfunction addEventListener(type, listener) {var _this$inner;for (var _len = arguments.length, options = new Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) {options[_key - 2] = arguments[_key];}\n  if (!isChild(this.inner)) {\n    if (this.registeredEventListeners.has(type)) {\n      this.registeredEventListeners.get(type).set(listener, options);\n    } else {\n      this.registeredEventListeners.set(type, new Map([[listener, options]]));\n    }\n  }\n  (_this$inner = this.inner).addEventListener.apply(_this$inner, [type, listener].concat(options));\n}\n\n/**\n   * Helper method that removes the registered event handlers\n   * and calls the same method on the inner object\n   * @private\n   */\nfunction removeEventListener(type, listener) {var _this$inner2;\n  if (!isChild(this.inner)) {\n    if (this.registeredEventListeners.has(type)) {\n      if (this.registeredEventListeners.get(type).has(listener)) {\n        this.registeredEventListeners.get(type).delete(listener);\n      }\n    }\n  }for (var _len2 = arguments.length, options = new Array(_len2 > 2 ? _len2 - 2 : 0), _key2 = 2; _key2 < _len2; _key2++) {options[_key2 - 2] = arguments[_key2];}\n  (_this$inner2 = this.inner).removeEventListener.apply(_this$inner2, [type, listener].concat(options));\n}\n\nexport { GlobalManager };","import { GlobalManager } from './GlobalManager';\nvar globalManager = new GlobalManager();\n\nfunction GlobalManagerMixin() {\n  this.globalManager = globalManager;\n\n  this.setGlobalManager = function (globalManager) {\n    this.globalManager = globalManager;\n    this.onSetGlobalManager(this.globalManager);\n  };\n\n\n  //  Classes can override this method to pass the \n  //  globalManager instance to other objects\n  //  See DockingPanel.js for an example\n  this.onSetGlobalManager = function (globalManager) {\n    // To be overridden\n  };\n\n  this.getWindow = function () {\n    return this.globalManager.getWindow();\n  };\n\n  this.getDocument = function () {\n    return this.globalManager.getDocument();\n  };\n\n  this.setWindow = function (newWindow) {\n    return this.globalManager.setWindow(newWindow);\n  };\n\n  this.addWindowEventListener = function (type, listener) {var _this$globalManager;for (var _len = arguments.length, options = new Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) {options[_key - 2] = arguments[_key];}\n    (_this$globalManager = this.globalManager).addWindowEventListener.apply(_this$globalManager, [type, listener].concat(options));\n  };\n\n  this.removeWindowEventListener = function (type, listener) {var _this$globalManager2;for (var _len2 = arguments.length, options = new Array(_len2 > 2 ? _len2 - 2 : 0), _key2 = 2; _key2 < _len2; _key2++) {options[_key2 - 2] = arguments[_key2];}\n    (_this$globalManager2 = this.globalManager).removeWindowEventListener.apply(_this$globalManager2, [type, listener].concat(options));\n  };\n\n  this.addDocumentEventListener = function (type, listener) {var _this$globalManager3;for (var _len3 = arguments.length, options = new Array(_len3 > 2 ? _len3 - 2 : 0), _key3 = 2; _key3 < _len3; _key3++) {options[_key3 - 2] = arguments[_key3];}\n    (_this$globalManager3 = this.globalManager).addDocumentEventListener.apply(_this$globalManager3, [type, listener].concat(options));\n  };\n\n  this.removeDocumentEventListener = function (type, listener) {var _this$globalManager4;for (var _len4 = arguments.length, options = new Array(_len4 > 2 ? _len4 - 2 : 0), _key4 = 2; _key4 < _len4; _key4++) {options[_key4 - 2] = arguments[_key4];}\n    (_this$globalManager4 = this.globalManager).removeDocumentEventListener.apply(_this$globalManager4, [type, listener].concat(options));\n  };\n\n}\n\nAutodesk.Viewing.GlobalManager = GlobalManager;\nAutodesk.Viewing.GlobalManagerMixin = GlobalManagerMixin;\n\nexport { GlobalManagerMixin };","\nimport { ObjectAssign, getGlobal } from \"../compat\";\n\nexport var DefaultLightPreset = 1; // \"Sharp Highlights\"\nexport var DefaultLightPreset2d = 0; // \"Simple Grey\"\nexport var DefaultToneMapMethod = 1;\n\nexport var BackgroundPresets = {\n  \"Fusion Grey\": [230, 230, 230, 150, 150, 150],\n  \"Sky Blue\": [226, 244, 255, 156, 172, 180],\n  \"Snow\": [181, 186, 199, 181, 186, 199],\n  \"Midnight\": [41, 76, 120, 1, 2, 3],\n  \"White\": [255, 255, 255, 255, 255, 255],\n  \"AutoCADModel\": [30, 40, 48, 30, 40, 48],\n  \"Dark Grey\": [51, 51, 51, 51, 51, 51],\n  \"Dark Sky\": [51, 51, 51, 51, 51, 51],\n  \"Infinity Pool\": [255, 255, 255, 255, 255, 255],\n  \"Tranquility\": [0, 84, 166, 0, 84, 166],\n  \"Grey Room\": [129, 129, 129, 129, 129, 129],\n  \"Photo Booth\": [237, 237, 237, 237, 237, 237],\n  \"RaaS SBS\": [1, 1, 1, 90, 90, 90],\n  \"Plaza\": [79, 102, 130, 79, 102, 130],\n  \"Field\": [202, 226, 252, 202, 201, 190],\n  \"Boardwalk\": [216, 230, 248, 230, 228, 220],\n\n  //This will get modified when the user changes the background\n  //using the color picker.\n  \"Custom\": [230, 230, 230, 150, 150, 150] };\n\n\nvar bg = BackgroundPresets;\n\nexport var LightPresets = [\n//Notes: tonemap = which tone map method to use. Any tonemap method other than zero will cause colors to be linearized before use.\n//              0 = None, 1 = Prism Cannon-Lum (color preserving), 2 = OGC Cannon RGB (non-color preserving)\n//       exposure = exponential bias to use as pre-tonemap multiplier for all rendered colors, including background\n//       lightMultiplier = linear scale of direct light intensity (diffuse only, not ambient)\n//       bgColorGradient = which background color preset to use as default for the environment map\n//       illuminance     = cosine-weighted integral of the upper-hemisphere (i.e., actual lux)\n\n//Image-based lighting from RaaS. Initial exposure is empirically obtained.\n//These do not normally require any extra lights, because they have the lights fully baked into\n//the environment maps.\n\n//Simple ***non-HDR*** environment.\n{\n  name: \"Simple Grey\", // localized in viewer-environments.loc.json\n  path: null,\n  tonemap: 0,\n  E_bias: 0,\n  directLightColor: [1.0, 0.84, 0.67],\n  ambientColor: [0.8 * 0.25, 0.9 * 0.25, 1.0 * 0.25],\n  lightMultiplier: 1.0,\n  bgColorGradient: bg[\"Fusion Grey\"],\n  darkerFade: false,\n  rotation: 0.0 },\n\n\n//Fusion Environments which require extra lights\n\n// The E_bias value for the Fusion render-space environments is setup such that\n// the default values match the preset values of brightness (in lux) and EV.\n// The EV value from Fusion follows the Canon standard for luminance and middle-gray\n// https://en.wikipedia.org/wiki/Exposure_value#EV_as_a_measure_of_luminance_and_illuminance [September 2015]\n//\n// Rationale (using the canon tonemap as a guide, based on documentation by Adam Arbree):\n// 1. BaseExposure (B) in the canon tonemap is the negative log2 luminance of the\n//    white point (W) so B = -log2(W)\n// 2. To match the target illuminance from Fusion, the environment needs\n//    to be scaled by the ratio between the target and its actual illuminance, thus\n//    S = target_illuminance / actual_illuminance\n// 3. Then by the definition of middle grey W = L / (0.18*S) where L is the middle grey\n//    luminance and 0.18 is the standard reflection of middle grey.\n// 4. As per the Wikipedia entry, we have L = 2^(EV-3)\n// 5. Putting this all together we have\n//      B = -log2( 2^(EV-3) / (0.18*S))\n//        = log2(0.18) + log2(S) – (EV – 3)\n//        = (3+log2(0.18)) – EV + log2(S)\n//        = 0.526069 – EV + log2(S)\n\n{\n  name: \"Sharp Highlights\", // localized in viewer-environments.loc.json\n  path: \"SharpHighlights\",\n  type: \"logluv\",\n  tonemap: DefaultToneMapMethod,\n  // illuminance currently is not used elsewhere in LMV, its effect is folded into E_bias.\n  //illuminance: 1000.0,\n  E_bias: -9.0, // EV 9.526, 1000.0 lux (target)\n  directLightColor: [0.5, 0.5, 0.5],\n  ambientColor: [0.25 / 8, 0.25 / 8, 0.25 / 8],\n  lightMultiplier: 0.0,\n  lightDirection: [0.5, -0.2, -0.06],\n  bgColorGradient: bg[\"Photo Booth\"],\n  darkerFade: true,\n  rotation: 0.0 },\n\n\n{\n  name: \"Dark Sky\", // \"Dark Sky\", localized in viewer-environments.loc.json\n  path: \"DarkSky\",\n  type: \"logluv\",\n  tonemap: DefaultToneMapMethod,\n  E_bias: -1,\n  directLightColor: [1, 1, 1],\n  ambientColor: [0.25 / 8, 0.25 / 8, 0.25 / 8], //0.25 with gain of 0.125\n  lightMultiplier: 1.0,\n  lightDirection: [0.1, -0.55, -1.0],\n  bgColorGradient: bg[\"Dark Sky\"],\n  darkerFade: false,\n  rotation: 0.0 },\n\n\n{\n  name: \"Grey Room\", // \"Grey Room\", localized in viewer-environments.loc.json\n  path: \"GreyRoom\",\n  type: \"logluv\",\n  tonemap: DefaultToneMapMethod,\n  E_bias: -1,\n  directLightColor: [1, 1, 1],\n  ambientColor: [0.25 / 8, 0.25 / 8, 0.25 / 8],\n  lightMultiplier: 0.5,\n  lightDirection: [0.1, -0.55, -1.0],\n  bgColorGradient: bg[\"Grey Room\"],\n  darkerFade: true,\n  rotation: 0.0 },\n\n\n{\n  name: \"Photo Booth\", // \"Photo Booth\", localized in viewer-environments.loc.json\n  path: \"PhotoBooth\",\n  type: \"logluv\",\n  tonemap: DefaultToneMapMethod,\n  E_bias: 0,\n  directLightColor: [1, 1, 1],\n  ambientColor: [0.25 / 8, 0.25 / 8, 0.25 / 8],\n  lightMultiplier: 0.5,\n  lightDirection: [0.1, -0.55, -1.0],\n  bgColorGradient: bg[\"Photo Booth\"],\n  darkerFade: true,\n  rotation: 0.0 },\n\n\n{\n  name: \"Tranquility\", // \"Tranquility\", localized in viewer-environments.loc.json\n  path: \"TranquilityBlue\",\n  type: \"logluv\",\n  tonemap: DefaultToneMapMethod,\n  E_bias: -1,\n  directLightColor: [1, 1, 1],\n  ambientColor: [0.25 / 8, 0.25 / 8, 0.25 / 8],\n  lightMultiplier: 0.5,\n  lightDirection: [0.1, -0.55, -1.0],\n  bgColorGradient: bg[\"Tranquility\"],\n  darkerFade: false,\n  rotation: 0.0 },\n\n\n{\n  name: \"Infinity Pool\", // \"Infinity Pool\", localized in viewer-environments.loc.json\n  path: \"InfinityPool\",\n  type: \"logluv\",\n  tonemap: DefaultToneMapMethod,\n  E_bias: -1,\n  directLightColor: [1.0, 0.84, 0.67],\n  ambientColor: [0.25 / 8, 0.25 / 8, 0.25 / 8],\n  lightMultiplier: 0.5,\n  lightDirection: [0.1, -0.55, -1.0],\n  bgColorGradient: bg[\"Infinity Pool\"],\n  darkerFade: false,\n  rotation: 0.0 },\n\n\n// Non fusion environments\n\n//White background, no HDR -- for cases like SIM360 models\n{\n  name: \"Simple White\", //\"Simple White\", localized in viewer-environments.loc.json\n  path: null,\n  tonemap: 0,\n  E_bias: 0,\n  directLightColor: [1, 1, 1],\n  ambientColor: [0.25, 0.25, 0.25],\n  lightMultiplier: 1.0,\n  bgColorGradient: bg[\"White\"],\n  saoRadius: 0.06,\n  saoIntensity: 0.15,\n  darkerFade: true,\n  rotation: 0.0 },\n\n/*\r\n                           {\r\n                               name: \"Simple Black\",\r\n                               path:null,\r\n                               tonemap:0,\r\n                               E_bias:0,\r\n                               directLightColor: [1.0, 0.84, 0.67],\r\n                               ambientColor:     [0.8, 0.9,  1.0],\r\n                               lightMultiplier: 1.0,\r\n                               bgColorGradient: bg[\"AutoCADModel\"],\r\n                               darkerFade: false\r\n                           },\r\n                     */\n//RaaS environments\n{\n  name: \"Riverbank\", // \"Riverbank\", localized in viewer-environments.loc.json\n  path: \"riverbank\",\n  type: \"logluv\",\n  tonemap: DefaultToneMapMethod,\n  E_bias: -5.7,\n  directLightColor: [1, 1, 1],\n  lightMultiplier: 0.0,\n  bgColorGradient: bg[\"Sky Blue\"],\n  darkerFade: false,\n  rotation: 0.0 },\n\n\n{\n  name: \"Contrast\", // \"Contrast\", localized in viewer-environments.loc.json\n  path: \"IDViz\",\n  type: \"logluv\",\n  tonemap: DefaultToneMapMethod,\n  E_bias: 0,\n  directLightColor: [1, 1, 1],\n  lightMultiplier: 0.0,\n  bgColorGradient: bg[\"Midnight\"],\n  darkerFade: false,\n  rotation: 0.0 },\n\n\n{\n  name: \"Rim Highlights\", //  localized in viewer-environments.loc.json\n  path: \"RimHighlights\",\n  type: \"logluv\",\n  tonemap: DefaultToneMapMethod,\n  //illuminance: 1000.0,\n  E_bias: -9.0, // EV 9.526, 1000.0 lux (target)\n  directLightColor: [0.5, 0.5, 0.5],\n  ambientColor: [0.25 / 8, 0.25 / 8, 0.25 / 8],\n  lightMultiplier: 0.0,\n  lightDirection: [0.35, -0.35, -0.5],\n  bgColorGradient: bg[\"Photo Booth\"],\n  darkerFade: true,\n  rotation: 0.0 },\n\n{\n  name: \"Cool Light\", // \"Cool Light\", localized in viewer-environments.loc.json\n  path: \"CoolLight\",\n  type: \"logluv\",\n  tonemap: DefaultToneMapMethod,\n  //illuminance: 1000.0,\n  E_bias: -9.0, // EV 9.526, 1000.0 lux (target)\n  directLightColor: [1, 1, 1],\n  ambientColor: [0.25 / 8, 0.25 / 8, 0.25 / 8],\n  lightMultiplier: 0.0,\n  lightDirection: [-0.0, -0.15, -0.5],\n  bgColorGradient: bg[\"Fusion Grey\"],\n  darkerFade: true,\n  rotation: 0.0 },\n\n\n{\n  name: \"Warm Light\", // \"Warm Light\", localized in viewer-environments.loc.json\n  path: \"WarmLight\",\n  type: \"logluv\",\n  tonemap: DefaultToneMapMethod,\n  //illuminance: 1000.0,\n  E_bias: -9.0, // EV 9.526, 1000.0 lux (target)\n  directLightColor: [1, 1, 1],\n  ambientColor: [0.25 / 8, 0.25 / 8, 0.25 / 8],\n  lightMultiplier: 0.0,\n  lightDirection: [-0.0, -0.15, -0.5],\n  bgColorGradient: bg[\"Fusion Grey\"],\n  darkerFade: true,\n  rotation: 0.0 },\n\n\n{\n  name: \"Soft Light\", // \"Soft Light\", localized in viewer-environments.loc.json\n  path: \"SoftLight\",\n  type: \"logluv\",\n  tonemap: DefaultToneMapMethod,\n  //illuminance: 1000.0,\n  E_bias: -9.0, // EV 9.526, 1000.0 lux (target)\n  directLightColor: [1, 1, 1],\n  ambientColor: [0.25 / 8, 0.25 / 8, 0.25 / 8],\n  lightMultiplier: 0.0,\n  lightDirection: [-0.5, -0.5, 0.0],\n  bgColorGradient: bg[\"Fusion Grey\"],\n  darkerFade: true,\n  rotation: 0.0 },\n\n\n{\n  name: \"Grid Light\", // \"Grid Light\", localized in viewer-environments.loc.json\n  path: \"GridLight\",\n  type: \"logluv\",\n  tonemap: DefaultToneMapMethod,\n  //illuminance: 1000.0,\n  E_bias: -9.0, // EV 9.526, 1000.0 lux (target)\n  directLightColor: [1, 1, 1],\n  ambientColor: [0.25 / 8, 0.25 / 8, 0.25 / 8],\n  lightMultiplier: 0.0,\n  lightDirection: [-0.5, -0.6, 0.0],\n  bgColorGradient: bg[\"Fusion Grey\"],\n  darkerFade: true,\n  rotation: 0.0 },\n\n\n{\n  name: \"Plaza\", //  \"Plaza\", localized in viewer-environments.loc.json\n  path: \"Plaza\",\n  type: \"logluv\",\n  tonemap: DefaultToneMapMethod,\n  //illuminance: 24157.736,\n  E_bias: -14.0, // FIXME: EV 14.526, 50000.0 lux in the GUI, yet it does not seem to use illuminance\n  directLightColor: [0.9, 0.9, 1],\n  ambientColor: [0.25 / 8, 0.25 / 8, 0.25 / 8],\n  lightMultiplier: 0.0, //8000.0, Turned off -- until we support world space light positioning.\n  lightDirection: [-0.2, -0.18, 0.72],\n  bgColorGradient: bg[\"Plaza\"],\n  darkerFade: false,\n  rotation: 0.0 },\n\n\n{\n  name: \"Snow Field\", //  \"Snow Field\", localized in viewer-environments.loc.json\n  path: \"SnowField\",\n  type: \"logluv\",\n  tonemap: DefaultToneMapMethod,\n  //illuminance: 4302.7773,\n  E_bias: -10.461343, // EV 14.526, 50000.0 lux (target)\n  directLightColor: [1, 1, 1],\n  ambientColor: [0.25 / 8, 0.25 / 8, 0.25 / 8],\n  lightMultiplier: 0.0, //800.0, Turned off -- until we support world space light positioning.\n  lightDirection: [0.0, -1.0, 0.0],\n  bgColorGradient: bg[\"Snow\"],\n  darkerFade: false,\n  rotation: 0.0 },\n\n{\n  name: \"Field\", //  \"Field\", localized in viewer-environments.loc.json\n  path: \"field\",\n  type: \"logluv\",\n  tonemap: DefaultToneMapMethod,\n  E_bias: -2.9,\n  directLightColor: [1, 1, 1],\n  lightMultiplier: 0.0,\n  bgColorGradient: bg[\"Field\"],\n  useIrradianceAsBackground: true,\n  darkerFade: true,\n  rotation: 0.0 },\n\n{\n  name: \"Boardwalk\", //  \"Boardwalk\", localized in viewer-environments.loc.json\n  path: \"boardwalk\",\n  type: \"logluv\",\n  tonemap: DefaultToneMapMethod,\n  E_bias: -7.0,\n  directLightColor: [1, 1, 1],\n  lightMultiplier: 0.0,\n  bgColorGradient: bg[\"Boardwalk\"],\n  useIrradianceAsBackground: true,\n  darkerFade: false,\n  rotation: 0.0 },\n\n//3ds Max non-HDR Flat Shading preset.\n//This allows us to configure SimplePhong to render just the texture.\n{\n  name: \"Flat Shading\", // localized in viewer-environments.loc.json\n  path: null,\n  tonemap: 0,\n  E_bias: 0,\n  directLightColor: [0.0, 0.0, 0.0],\n  ambientColor: [0.0, 0.0, 0.0],\n  lightMultiplier: 0.0,\n  bgColorGradient: bg[\"Fusion Grey\"],\n  darkerFade: false,\n  rotation: 0.0 }];\n\n\n\nvar DebugEnvironments = [\n\n//Environments added for Fluent\n{\n  name: \"Harbor\",\n  path: \"Harbor\",\n  type: \"logluv\",\n  tonemap: DefaultToneMapMethod,\n  E_bias: 1.9,\n  directLightColor: [1, 1, 1],\n  lightMultiplier: 0.0,\n  bgColorGradient: bg[\"Sky Blue\"],\n  useIrradianceAsBackground: true,\n  saoIntensity: 0.5,\n  darkerFade: false,\n  rotation: 0.0 },\n\n\n{\n  name: \"Night\",\n  path: \"Night\",\n  type: \"logluv\",\n  tonemap: 1,\n  E_bias: 4.0,\n  directLightColor: [1, 1, 1],\n  lightMultiplier: 0.0,\n  bgColorGradient: bg[\"Midnight\"],\n  useIrradianceAsBackground: false,\n  darkerFade: false,\n  rotation: 0.0 },\n\n\n{\n  name: \"Parking\",\n  path: \"Parking\",\n  type: \"logluv\",\n  tonemap: DefaultToneMapMethod,\n  E_bias: 2.8,\n  directLightColor: [1, 1, 1],\n  lightMultiplier: 0.0,\n  bgColorGradient: bg[\"Sky Blue\"],\n  useIrradianceAsBackground: false,\n  saoIntensity: 0.5,\n  darkerFade: false,\n  rotation: 0.0 },\n\n\n{\n  name: \"River Road\",\n  path: \"RiverRoad\",\n  type: \"logluv\",\n  tonemap: DefaultToneMapMethod,\n  E_bias: 0.0,\n  directLightColor: [1, 1, 1],\n  lightMultiplier: 0.0,\n  bgColorGradient: bg[\"Fusion Grey\"],\n  useIrradianceAsBackground: false,\n  saoIntensity: 0.7,\n  darkerFade: false,\n  rotation: 0.0 },\n\n\n\n//More RaaS ones\n{\n  name: \"Crossroads\", //  \"Crossroads\", localized in viewer-environments.loc.json\n  path: \"crossroads\",\n  type: \"logluv\",\n  tonemap: DefaultToneMapMethod,\n  E_bias: -5.5,\n  directLightColor: [1, 1, 1],\n  lightMultiplier: 0.0,\n  bgColorGradient: bg[\"Sky Blue\"],\n  useIrradianceAsBackground: true,\n  darkerFade: true,\n  rotation: 0.0 },\n\n{\n  name: \"Seaport\", //  \"Seaport\", localized in viewer-environments.loc.json\n  path: \"seaport\",\n  type: \"logluv\",\n  tonemap: DefaultToneMapMethod,\n  E_bias: -6.5,\n  directLightColor: [1, 1, 1],\n  lightMultiplier: 0.0,\n  bgColorGradient: bg[\"Sky Blue\"],\n  useIrradianceAsBackground: true,\n  darkerFade: false,\n  rotation: 0.0 },\n\n\n{\n  name: \"Glacier\", //  \"Glacier\", localized in viewer-environments.loc.json\n  path: \"glacier\",\n  type: \"logluv\",\n  tonemap: DefaultToneMapMethod,\n  E_bias: 0,\n  directLightColor: [1, 1, 1],\n  lightMultiplier: 0.0,\n  bgColorGradient: bg[\"Midnight\"],\n  darkerFade: false,\n  rotation: 0.0 },\n\n{\n  name: \"RaaS Test Env\", // localized in viewer-environments.loc.json\n  path: \"Reflection\",\n  type: \"logluv\",\n  tonemap: 2,\n  E_bias: -1.5,\n  directLightColor: [1, 1, 1],\n  lightMultiplier: 0.0,\n  bgColorGradient: bg[\"RaaS SBS\"],\n  darkerFade: false,\n  rotation: 0.0 },\n\n\n\n//From Fluent\n{\n  name: \"City Night\",\n  path: \"CityNight\",\n  type: \"logluv\",\n  tonemap: DefaultToneMapMethod,\n  E_bias: 1.6,\n  directLightColor: [1, 1, 1],\n  lightMultiplier: 0.2,\n  bgColorGradient: bg[\"Midnight\"],\n  useIrradianceAsBackground: false,\n  darkerFade: false,\n  rotation: 0.0 }];\n\n\n\nif (getGlobal().ENABLE_DEBUG) {\n  Array.prototype.push.apply(LightPresets, DebugEnvironments);\n}\n\n/**\r\n   * Copies properties from a Preset (src) into a user provided preset (env)\r\n   * Ideally, this function is used with ModelSettingsEnvironment\r\n   * @private\r\n   */\nexport function copyLightPreset(src, env) {\n  ObjectAssign(env, src);\n  env.name = src.name + \" (copy)\";\n}","function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}import { GlobalManagerMixin } from './GlobalManagerMixin';\n\nexport var LoadingSpinner = /*#__PURE__*/function () {\n\n  function LoadingSpinner() {_classCallCheck(this, LoadingSpinner);\n    this.domElement = null;\n  }_createClass(LoadingSpinner, [{ key: \"createDom\", value: function createDom(\n\n    container) {\n      var _document = this.getDocument();\n      var loadSpinner = _document.createElement(\"div\");\n      loadSpinner.className = \"spinner\";\n      container && container.appendChild(loadSpinner);\n\n      // Generate circles for spinner\n      for (var i = 1; i <= 3; i++) {\n        var spinnerContainer = _document.createElement(\"div\");\n        spinnerContainer.className = \"bounce\" + i;\n        //spinnerContainer.style['background-color'] = 'red';\n        loadSpinner.appendChild(spinnerContainer);\n      }\n\n      this.domElement = loadSpinner;\n      this.hide();\n      return loadSpinner;\n    } }, { key: \"show\", value: function show()\n\n    {\n      if (this.domElement) {\n        this.domElement.style.display = \"block\";\n      }\n    } }, { key: \"hide\", value: function hide()\n\n    {\n      if (this.domElement) {\n        this.domElement.style.display = \"None\";\n      }\n    } }, { key: \"destroy\", value: function destroy()\n\n    {\n      this.domElement = null;\n    } }]);return LoadingSpinner;}();\n\n\nGlobalManagerMixin.call(LoadingSpinner.prototype);","\nimport { logger } from \"../logger/Logger\";\nimport { getGlobal } from \"../compat\";\n\nvar _window = getGlobal();\n\nvar _supported = isLocalStorageSupported();\n\n/**\n                                             * Helper function that detects whether localStorage is available.\n                                             * @private\n                                             */\nfunction isLocalStorageSupported() {\n  if (typeof window === \"undefined\")\n  return false;\n\n  try {\n    var TEST_KEY = 'lmv_viewer_test_localStorage';\n    var storage = _window.localStorage; // This may assert if browsers disallow sites from setting data.\n    if (!storage)\n    return false;\n\n    storage.setItem(TEST_KEY, '1');\n    storage.removeItem(TEST_KEY);\n    return true;\n\n  } catch (error) {\n    return false;\n  }\n}\n\nfunction LocalStorageClass() {\n  if (!_supported) {\n    this._data = {};\n  }\n}\n\n/**\n   * Get an item from localStorage.\n   * Returns null localStorage is not available.\n   */\nLocalStorageClass.prototype.getItem = function (key) {\n  if (!_supported) {\n    return this._data.hasOwnProperty(key) ? this._data[key] : null;\n  } else {\n    return _window.localStorage.getItem(key);\n  }\n};\n\n/**\n    * Set an item into localStorage.\n    * Does nothing if localStorage is not available OR if\n    * the max quota is exceeded.\n    */\nLocalStorageClass.prototype.setItem = function (key, value) {\n  if (!_supported) {\n    this._data[key] = String(value);\n  } else {\n    try {\n      _window.localStorage.setItem(key, value);\n    } catch (eee) {\n      logger.debug('avp.LocalStorage: Failed to setItem()');\n    }\n  }\n};\n\n/**\n    * Removes an item from localStorage.\n    * Does nothing if localStorage is not available.\n    */\nLocalStorageClass.prototype.removeItem = function (key) {\n  if (!_supported) {\n    delete this._data[id];\n  } else {\n    _window.localStorage.removeItem(key);\n  }\n};\n\n/**\n    * Empty all keys out of the storage\n    */\nLocalStorageClass.prototype.clear = function () {\n  if (!_supported) {\n    this._data = {};\n  } else {\n    _window.localStorage.clear();\n  }\n};\n\n/**\n    * Returns true is localStorage is supported.\n    */\nLocalStorageClass.prototype.isSupported = function () {\n  return _supported;\n};\n\n/**\n    * Returns all keys from localStorage.\n    */\nLocalStorageClass.prototype.getAllKeys = function () {\n  if (!_supported) {\n    return Object.keys(this._data);\n  } else {\n    return Object.keys(_window.localStorage);\n  }\n};\n\n/**\n    * Global instance for interacting with localStorage.\n    * @private\n    */\nexport var LocalStorage = new LocalStorageClass();","import { RenderModel } from \"../wgs/scene/RenderModel\";\nimport { EventDispatcher } from \"./EventDispatcher\";\nimport { pathToURL } from \"../file-loaders/net/Xhr\";\n// import { logger } from \"../logger/Logger\";\nimport { LmvMatrix4 } from \"../wgs/scene/LmvMatrix4\";\nimport { isMobileDevice } from \"../compat\";\nimport { FragmentPointer } from \"../wgs/scene/FragmentList\";\nimport { UnifiedCamera } from \"../tools/UnifiedCamera\";\n\nexport var ModelUnits = {\n  METER: 'm',\n  CENTIMETER: 'cm',\n  MILLIMETER: 'mm',\n  FOOT: 'ft',\n  INCH: 'in',\n  POINT: 'pt' };\n\n\n\n/**\n                  * Core class representing the geometry.\n                  *\n                  * @constructor\n                  * @memberof Autodesk.Viewing\n                  * @alias Autodesk.Viewing.Model\n                  */\nexport function Model(modelData)\n{\n  RenderModel.call(this);\n  this.myData = modelData;\n  this.topology = null;\n  this.topologyPromise = null;\n  this.svfUUID = null;\n  this.defaultCameraHash = null;\n\n  // RenderModel overrides\n\n  /**\n   * @returns {InstanceTree} Instance tree of the model if available, otherwise null.\n   */\n  this.getInstanceTree = function () {\n    if (this.myData)\n    return this.myData.instanceTree;\n    return null;\n  };\n\n  /**\n      * @param {bool} [ignoreTransform] - Set to true to return the original bounding box in model space coordinates.\n      * @param {bool} [excludeShadow]    - Remove shadow geometry (if exists) from model bounds.\n      * @returns {THREE.Box3} Bounding box of the model if available, otherwise null.\n      */\n  this.getBoundingBox = function () {\n    var bbox = new THREE.Box3();\n\n    return function (ignoreTransform, excludeShadow) {\n      if (!this.myData) {\n        return null;\n      }\n\n      // Prefer returning modelSpaceBBox, which is the original model's bounding box without placementTransform.\n      // If for some reason it doesn't exist (missing in loader) - return bbox baked with placementTransform.\n      bbox.copy(this.myData.modelSpaceBBox || this.myData.bbox);\n\n      // Remove shadow geometry if needed.\n      if (excludeShadow) {\n        bbox.copy(this.trimPageShadowGeometry(bbox));\n      }\n\n      // If ignore transform is set, we are done.\n      if (ignoreTransform) {\n        return bbox;\n      }\n\n      // Apply placement transform\n      var placementMatrix = this.getData().placementWithOffset;\n\n      // Apply placement transform only if the modelSpace bounding box was used (should be always technically, unless it's missing in the loader).\n      if (placementMatrix && this.myData.modelSpaceBBox) {\n        bbox.applyMatrix4(placementMatrix);\n      }\n\n      // Apply dynamic model transform.\n      var modelMatrix = this.getModelTransform();\n\n      if (modelMatrix) {\n        bbox.applyMatrix4(modelMatrix);\n      }\n\n      return bbox;\n    };\n  }();\n\n  /**\n        * Computes Bounding box of all fragments, but excluding outliers.\n        * @param {Object} [options]\n        * @param {float}  [options.quantil=0.75]     - in [0,1]. Relative amount of fragments that we consider computation. \n        *                                              By default, we consider the 75% of fragments that are closest to the center. \n        * @param {float}  [options.center]           - Center from which we collect the closest shapes. By default, we use the center of mass.\n        * @param {bool}   [options.ignoreTransforms] - Optional: Ignore modelMatrix and animation transforms\n        * @param {Array<number>}   [options.allowlist] - Optional: Fragments to include in fuzzybox, by index.\n        * @returns {THREE.Box3}\n        */\n  this.getFuzzyBox = function () {var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n\n    var ignoreTransforms = Boolean(options.ignoreTransforms);\n\n    var frags = this.getFragmentList();\n\n    // For 2D models, just return regular bounding box.\n    // Verify frags exist - there are formats without fragments, like Leaflet.\n    if (!frags || this.is2d()) {\n      return this.getBoundingBox(ignoreTransforms);\n    }\n\n    // Decide which function to use to obtain fragBoxes\n    var getFragBounds = null;\n    if (ignoreTransforms) {\n      // get original fragment bbox without transforms\n      var tmpArray = new Array(6);\n\n      var pt = this.getData().placementWithOffset;\n      var invPt = pt ? new THREE.Matrix4().getInverse(pt) : undefined;\n\n      getFragBounds = function getFragBounds(fragId, dstBox) {\n        frags.getOriginalWorldBounds(fragId, tmpArray);\n        dstBox.min.fromArray(tmpArray);\n        dstBox.max.fromArray(tmpArray, 3);\n\n        if (invPt) {\n          dstBox.min.applyMatrix4(invPt);\n          dstBox.max.applyMatrix4(invPt);\n        }\n      };\n    } else {\n      // get bounds including model or fragment animation transforms\n      getFragBounds = function getFragBounds(fragId, dstBox) {\n        frags.getWorldBounds(fragId, dstBox);\n      };\n    }\n\n    function centerOfMass() {\n\n      var box = new THREE.Box3();\n      var center = new THREE.Vector3();\n      var size = new THREE.Vector3();\n      var total = new THREE.Vector3();\n      var mass = 0;\n\n      function processOneFragment(f) {\n        if (options.allowlist && !options.allowlist.includes(f)) {\n          return;\n        }\n\n        // get bbox center\n        getFragBounds(f, box);\n        box.center(center);\n\n        // sum centers weighted by bbox size\n        var weight = box.size(size).length();\n        total.add(center.multiplyScalar(weight));\n\n        mass += weight;\n      }\n\n      for (var i = 0; i < frags.getCount(); i++) {\n        processOneFragment(i);\n      }\n\n      total.multiplyScalar(1 / mass);\n      return total;\n    }\n\n    var center = options.center || centerOfMass();\n    var quantil = options.quantil || 0.75;\n\n    var fragBox = new THREE.Box3();\n\n    // Compute distances of each frag bbox from center\n    var fragInfos = [];\n    for (var i = 0; i < frags.getCount(); i++) {\n      if (options.allowlist && !options.allowlist.includes(i)) {\n        continue;\n      }\n\n      // Skip any empty boxes\n      getFragBounds(i, fragBox);\n      if (fragBox.empty()) {\n        continue;\n      }\n\n      // get fragBox->center distance\n      var dist = fragBox.distanceToPoint(center);\n\n      // If fragBox contains the center, use fragBox center.\n      if (dist === 0) {\n        dist = center.distanceTo(fragBox.center());\n      }\n\n      fragInfos.push({\n        fragId: i,\n        distance: dist });\n\n    }\n\n    // sort by increasing order\n    fragInfos.sort(function (a, b) {\n      return a.distance - b.distance;\n    });\n\n    // union of all fragBoxes, excluding the ones with largest distance to center\n    var box = new THREE.Box3();\n    for (var i = 0; i < fragInfos.length * quantil; i++) {\n      var fi = fragInfos[i];\n      getFragBounds(fi.fragId, fragBox);\n      box.union(fragBox);\n    }\n    return box;\n  };\n\n  /**\n      * @returns {boolean} Whether the model is 2D.\n      */\n  this.is2d = function () {\n    return !!(this.myData && this.myData.is2d);\n  };\n\n  /**\n      * @returns {boolean} Whether the model is 3D.\n      */\n  this.is3d = function () {\n    return !this.is2d();\n  };\n\n  /** \n      * @returns {boolean} true if the model is an OTG file - which supports sharing of materials and geometry. \n      */\n  this.isOTG = function () {\n    return this.myData && !!this.myData.isOTG;\n  };\n\n  /** \n      * @returns {boolean} true if the model is an SVF2 file - which supports sharing of materials and geometry. \n      */\n  this.isSVF2 = function () {\n    var node = this.getDocumentNode();\n    return node ? node.isSVF2() : false;\n  };\n\n  /**\n      * @param {bool} onlyPdfSource - Set to true in order to verify that the source file of the model is PDF.\n      *                                   .rvt files can get extracted to PDFs for example, and in that case,\n      *                                   when using the flag, we'll get false as a result.\n      * \n      * @returns {boolean} true if the model is created from a PDF file.\n      */\n  this.isPdf = function (onlyPdfSource) {var _this$getDocumentNode, _this$getDocumentNode2;\n    return !!(\n    this.myData &&\n    this.myData.isPdf && (\n    !onlyPdfSource || !((_this$getDocumentNode = this.getDocumentNode()) === null || _this$getDocumentNode === void 0 ? void 0 : (_this$getDocumentNode2 = _this$getDocumentNode.data) === null || _this$getDocumentNode2 === void 0 ? void 0 : _this$getDocumentNode2.isVectorPDF)));\n\n  };\n\n  /**\n      * @returns {boolean} true if the model is created from an image file.\n      */\n  this.isLeaflet = function () {\n    return !!(this.myData && this.myData.isLeaflet);\n  };\n\n  /**\n      * By default, Leaflet documents are being loaded in a normalized coordinate system. Only when\n      * using `fitPaperSize` load option, the model will be loaded in page coordinates, like every other 2D model.\n      * \n      * @returns {boolean} true if the model is loaded in page coordinates.\n      */\n  this.isPageCoordinates = function () {var _this$loader;\n    return this.is2d() && (!this.isLeaflet() || ((_this$loader = this.loader) === null || _this$loader === void 0 ? void 0 : _this$loader.isPageCoordinates()));\n  };\n\n  /**\n      * @returns {boolean} true if the model is created using Autodesk.Viewing.SceneBuilder extension\n      */\n  this.isSceneBuilder = function () {\n    return !!(this.myData && this.myData.isSceneBuilder);\n  };\n}\n\n/*\n   * Don't set Model's prototype to RenderModel. It's not needed for now.\n   */\n//Model.prototype = Object.create(RenderModel.prototype);\n\nEventDispatcher.prototype.apply(Model.prototype);\nModel.prototype.constructor = Model;\n\n\n/**\n                                      * Returns the geometry data.\n                                      * \n                                      * @memberof Autodesk.Viewing.Model\n                                      * @alias Autodesk.Viewing.Model#getData\n                                      */\nModel.prototype.getData = function ()\n{\n  return this.myData;\n};\n\n/**\n    * Set a UUID to identify the SVF model\n    * @param {string} urn - Data that represents the geometry.\n    */\nModel.prototype.setUUID = function (urn)\n{\n  this.svfUUID = btoa(encodeURI(pathToURL(urn)));\n};\n\n/**\n    * Returns an object wrapping the bubble/manifest entry for the\n    * loaded geometry. Contains data such as the viewableID, guid, role...\n    * \n    * @returns {Autodesk.Viewing.BubbleNode|null}\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#getDocumentNode\n    */\nModel.prototype.getDocumentNode = function () {\n  var data = this.getData();\n  if (data.loadOptions) {\n    return data.loadOptions.bubbleNode || null;\n  }\n  return null;\n};\n\n/**\n    * Returns the root of the geometry node graph.\n    * @returns {object} The root of the geometry node graph. Null if it doesn't exist.\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#getRoot\n    */\nModel.prototype.getRoot = function ()\n{\n  var data = this.getData();\n  if (data && data.instanceTree)\n  return data.instanceTree.root;\n  return null;\n};\n\n/**\n    * Returns the root of the geometry node graph.\n    * @returns {number} The ID of the root or null if it doesn't exist.\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#getRootId\n    */\nModel.prototype.getRootId = function ()\n{\n  var data = this.getData();\n  return data && data.instanceTree && data.instanceTree.getRootId() || 0;\n};\n\n/**\n    * Returns an object that contains the standard unit string (unitString) and the scale value (unitScale).\n    * @param {string} unit - Unit name from the metadata\n    * @returns {object} this object contains the standardized unit string (unitString) and a unit scaling value (unitScale)\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#getUnitData\n    */\nModel.prototype.getUnitData = function (unit)\n{\n  var returnValue = {\n    unitString: null,\n    unitScale: 1.0 };\n\n  //Why are translators not using standard strings for those?!?!?!?\n  switch (unit) {\n    case 'meter':\n    case 'meters':\n    case 'm':\n      returnValue.unitString = ModelUnits.METER;\n      returnValue.unitScale = 1.0;\n      return returnValue;\n    case 'foot':\n    case 'feet':\n    case 'ft':\n      returnValue.unitString = ModelUnits.FOOT;\n      returnValue.unitScale = 0.3048;\n      return returnValue;\n    case 'feet and inches':\n    case 'inch':\n    case 'inches':\n    case 'in':\n      returnValue.unitString = ModelUnits.INCH;\n      returnValue.unitScale = 0.0254;\n      return returnValue;\n    case 'centimeter':\n    case 'centimeters':\n    case 'cm':\n      returnValue.unitString = ModelUnits.CENTIMETER;\n      returnValue.unitScale = 0.01;\n      return returnValue;\n    case 'millimeter':\n    case 'millimeters':\n    case 'mm':\n      returnValue.unitString = ModelUnits.MILLIMETER;\n      returnValue.unitScale = 0.001;\n      return returnValue;\n    case 'point':\n    case 'points':\n    case 'pt':\n      returnValue.unitString = ModelUnits.POINT;\n      returnValue.unitScale = 0.0254 / 72; //A typographical point is 1/72 of an international inch\n      return returnValue;\n    default:\n      return returnValue;}\n\n};\n\n/**\n    * Returns the scale factor of model's distance unit to meters.\n    * @returns {number} The scale factor of the model's distance unit to meters or unity if the units aren't known.\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#getUnitScale\n    */\nModel.prototype.getUnitScale = function ()\n{\n  var unit;\n\n  if (!this.is2d()) {\n    var data = this.getData();\n    if (data && data.overriddenUnits) {\n      // explicit override trumps all\n      unit = data.overriddenUnits;\n    } else if (data && data.scalingUnit) {\n      unit = data.scalingUnit; // only using if scaling was actually applied\n    } else {\n      unit = this.getMetadata('distance unit', 'value', null);\n    }\n  } else\n  {\n    unit = this.getMetadata('page_dimensions', 'page_units', null);\n  }\n\n  if (unit)\n  unit = unit.toLowerCase();\n\n  return this.getUnitData(unit).unitScale;\n};\n\n/**\n    * Returns a standard string representation of the model's distance unit.\n    * @returns {string} Standard representation of model's unit distance or null if it is not known.\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#getUnitString\n    */\nModel.prototype.getUnitString = function () {\n\n  var unit;\n\n  if (!this.is2d()) {\n    // Check if there's an overridden model units in bubble.json (this happens in Revit 3D files)\n    var data = this.getData();\n    if (data && data.overriddenUnits) {\n      // explicit override trumps all\n      unit = data.overriddenUnits;\n    } else if (data && data.scalingUnit) {\n      unit = data.scalingUnit; // only using if scaling was actually applied\n    } else {\n      unit = this.getMetadata('distance unit', 'value', null);\n    }\n  } else\n  {\n    // Model units will be used for calculating the initial distance.\n    unit = this.getMetadata('page_dimensions', 'model_units', null) || this.getMetadata('page_dimensions', 'page_units', null);\n  }\n\n  if (unit)\n  unit = unit.toLowerCase();\n\n  return this.getUnitData(unit).unitString;\n};\n\n/**\n    * Returns a standard string representation of the model's display unit.\n    * @returns {string} Standard representation of model's display unit or null if it is not known.\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#getDisplayUnit\n   */\nModel.prototype.getDisplayUnit = function () {\n  var unit;\n\n  if (!this.is2d()) {\n    var data = this.getData();\n    if (data && data.scalingUnit) {\n      unit = data.scalingUnit; // only using if scaling was actually applied\n    } else {\n      unit = this.getMetadata('distance unit', 'value', null);\n    }\n  } else\n  {\n\n    // When model units is not set, it should be assumed to be the same as paper units.\n    unit = this.getMetadata('page_dimensions', 'model_units', null) || this.getMetadata('page_dimensions', 'page_units', null);\n  }\n\n  if (unit)\n  unit = unit.toLowerCase();\n\n  return this.getUnitData(unit).unitString;\n};\n\n/** \n    * Returns source file's units.\n    * @returns {string} Source file's units.\n    */\nModel.prototype.getSourceFileUnits = function () {\n  var node = this.getDocumentNode();\n  return node === null || node === void 0 ? void 0 : node.getSourceFileUnits();\n};\n\n/**\n    * Return metadata value.\n    * @param {string} itemName - Metadata item name.\n    * @param {string} [subitemName] - Metadata subitem name.\n    * @param {*} [defaultValue] - Default value.\n    * @returns {*} Metadata value, or defaultValue if no metadata or metadata item/subitem does not exist.\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#getMetadata\n    */\nModel.prototype.getMetadata = function (itemName, subitemName, defaultValue) {\n  var data = this.getData();\n  if (data) {\n    var metadata = data.metadata;\n    if (metadata) {\n      var item = metadata[itemName];\n      if (item !== undefined) {\n        if (subitemName) {\n          var subitem = item[subitemName];\n          if (subitem !== undefined) {\n            return subitem;\n          }\n        } else {\n          return item;\n        }\n      }\n    }\n  }\n  return defaultValue;\n};\n\n/*\n   Model.prototype.displayMetadata = function () {\n       logger.log('metadata:');\n       var data = this.getData();\n       if (data) {\n           var metadata = data.metadata;\n           if (metadata) {\n               for (itemName in metadata) {\n                   if (metadata.hasOwnProperty(itemName)) {\n                       logger.log('  ' + itemName);\n                       var item = metadata[itemName];\n                       if (item) {\n                           for (subItemName in item) {\n                               if (item.hasOwnProperty(subItemName)) {\n                                   logger.log('    ' + subItemName + '=' + JSON.stringify(item[subItemName]));\n                               }\n                           }\n                       }\n                   }\n               }\n           }\n       }\n   };\n   */\n\n/**\n       * Returns the default camera.\n       * \n       * @memberof Autodesk.Viewing.Model\n       * @alias Autodesk.Viewing.Model#getDefaultCamera\n       */\nModel.prototype.getDefaultCamera = function () {\n\n  var myData = this.getData();\n\n  if (!myData)\n  return null;\n\n  var defaultCamera = null;\n  var numCameras = myData.cameras ? myData.cameras.length : 0;\n  if (0 < numCameras) {\n    // Choose a camera.\n    // Use the default camera if specified by metadata.\n    //\n    var defaultCameraIndex = this.getMetadata('default camera', 'index', null);\n    if (defaultCameraIndex !== null && myData.cameras[defaultCameraIndex]) {\n      defaultCamera = myData.cameras[defaultCameraIndex];\n\n    } else {\n\n      // No default camera. Choose a perspective camera, if any.\n      //\n      for (var i = 0; i < numCameras; i++) {\n        var camera = myData.cameras[i];\n        if (camera.isPerspective) {\n          defaultCamera = camera;\n          break;\n        }\n      }\n\n      // No perspective cameras, either. Choose the first camera.\n      //\n      if (!defaultCamera) {\n        defaultCamera = myData.cameras[0];\n      }\n    }\n  }\n\n  // Consider model matrix if specified\n  var matrix = this.getModelTransform();\n  if (defaultCamera && matrix) {\n\n    // Create or reuse copy of the default camera\n    var transformedDefaultCamera = UnifiedCamera.copyViewParams(defaultCamera);\n\n    // Apply matrix to camera params\n    UnifiedCamera.transformViewParams(transformedDefaultCamera, matrix);\n\n    // Apply some traditional auto-repair magic if necessary.\n    //\n    // Note: Actually, this is already done by Viewer3DImpl.setViewFromCamera. However,\n    //       this only fixes the viewer main camera, but later calls to getDefaultCamera\n    //       would still get the unfixed one. In the past, this problem was just hidden,\n    //       because this function returned a pointer to the internal camera which was\n    //       then modified from outside.\n    UnifiedCamera.adjustOrthoCamera(transformedDefaultCamera, this.getBoundingBox());\n\n    return transformedDefaultCamera;\n  }\n\n  return defaultCamera;\n};\n\n/**\n    * @returns {boolean}  true when the \"AEC\" loader settings were used when loading the model\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#isAEC\n    */\nModel.prototype.isAEC = function () {\n  return !!this.getData().loadOptions.isAEC;\n};\n\n/**\n    * @returns {boolean}  true when a 2D model has a page shadow\n    *\n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#hasPageShadow\n    */\nModel.prototype.hasPageShadow = function () {\n  return this.getData().hasPageShadow;\n};\n\n/**\n    * Returns up vector as an array of 3.\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#getUpVector\n    */\nModel.prototype.getUpVector = function () {\n  return this.getMetadata('world up vector', 'XYZ', null);\n};\n\n/**\n    * Returns the polygon count.\n    * @returns {number}\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#geomPolyCount\n    */\nModel.prototype.geomPolyCount = function () {\n\n  var geomList = this.getGeometryList();\n  if (!geomList) {\n    return null;\n  }\n\n  return geomList.geomPolyCount;\n};\n\n/**\n    * Returns the instanced polygon count.\n    * @returns {number}\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#instancePolyCount\n    */\nModel.prototype.instancePolyCount = function () {\n\n  var geomList = this.getGeometryList();\n  if (!geomList) {\n    return null;\n  }\n\n  return geomList.instancePolyCount;\n};\n\n/**\n    * Returns true if the model with all its geometries has loaded.\n    * @returns {boolean}\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#isLoadDone\n    */\nModel.prototype.isLoadDone = function () {\n  var data = this.getData();\n  return !!(data && data.loadDone);\n};\n\n/**\n    * Returns true if the frag to node id mapping is done.\n    * @returns {boolean}\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#isObjectTreeCreated\n    */\nModel.prototype.isObjectTreeCreated = function () {\n\n  return !!this.getData().instanceTree;\n\n};\n\n/**\n    * Returns an instance of {@link PropDbLoader|PropertyDatabase Loader},\n    * responsible for communicating with the PropertyDatabase instance hosted in a browser worker thread.\n    *\n    * @returns {PropDbLoader}\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#getPropertyDb\n    */\nModel.prototype.getPropertyDb = function () {\n  var data = this.getData();\n  return data && data.propDbLoader;\n};\n\n/**\n    * Asyncronous method that gets object properties\n    * @deprecated Use getProperties2 instead - which makes sure that externalId table is only loaded if really needed.\n    * \n    * @param {number} dbId - The database identifier.\n    * @param {Callbacks#onPropertiesSuccess} [onSuccessCallback] - Callback for when the properties are fetched.\n    * @param {Callbacks#onGenericError} [onErrorCallback] - Callback for when the properties are not found or another error occurs.\n    * \n    * @alias Autodesk.Viewing.Model#getProperties\n    */\nModel.prototype.getProperties = function (dbId, onSuccessCallback, onErrorCallback)\n{\n  var pdb = this.getPropertyDb();\n\n  // Negative dbIds will not have properties.\n  // Negative dbIds are either paper (-1) or generated ids for 2d-texts\n  // dbIds start at 1, so 0 can be skipped as well.\n  if (!pdb || dbId <= 0) {\n    onErrorCallback && onErrorCallback();\n    return;\n  }\n\n  pdb.getProperties(dbId, onSuccessCallback, onErrorCallback);\n};\n\n/**\n    * Asyncronous method that gets object properties\n    * \n    * @param {number} dbId - The database identifier.\n    * @param {Callbacks#onPropertiesSuccess} [onSuccessCallback] - Callback for when the properties are fetched.\n    * @param {Callbacks#onGenericError} [onErrorCallback] - Callback for when the properties are not found or another error occurs.\n    * @param {Object}  [options]\n    * @param {boolean} [options.needsExternalId] - Ensures loading of externalID table if necessary. This may consume a lot of memory. Only use if you really need externalIds.\n    * @alias Autodesk.Viewing.Model#getProperties2\n    */\nModel.prototype.getProperties2 = function (dbId, onSuccessCallback, onErrorCallback, options)\n{\n  var pdb = this.getPropertyDb();\n\n  // Negative dbIds will not have properties.\n  // Negative dbIds are either paper (-1) or generated ids for 2d-texts\n  // dbIds start at 1, so 0 can be skipped as well.\n  if (!pdb || dbId <= 0) {\n    onErrorCallback && onErrorCallback();\n    return;\n  }\n\n  pdb.getProperties2(dbId, onSuccessCallback, onErrorCallback, options);\n};\n\n/**\n    * Returns properties for multiple objects with an optional filter on which properties to retrieve.\n    * @deprecated Use getBuldProperties2 instead.\n    *\n    * @param {int[]} dbIds - IDs of the nodes to return the properties for.\n    * @param {object|undefined} options - Dictionary with options.\n    * @param {string[]} [options.propFilter] - Array of property names to return values for. Use null for no filtering.\n    * Filter applies to \"name\" and \"externalId\" fields also.\n    * @param {boolean} [options.ignoreHidden] - Ignore hidden properties\n    * @param {function} onSuccessCallback - This method is called when request for property db succeeds.\n    * @param {function} onErrorCallback - This method is called when request for property db fails.\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#getBulkProperties\n    */\nModel.prototype.getBulkProperties = function (dbIds, options, onSuccessCallback, onErrorCallback)\n{\n  if (Array.isArray(options)) {\n    // backwards compatibility for when options was actually propFilter.\n    options = { propFilter: options };\n  }\n\n  options = options || {};\n  var propFilter = options.propFilter || null;\n  var ignoreHidden = options.ignoreHidden || false;\n\n  var pdb = this.getPropertyDb();\n  if (!pdb) {\n    onErrorCallback && onErrorCallback();\n    return;\n  }\n\n  pdb.getBulkProperties(dbIds, propFilter, onSuccessCallback, onErrorCallback, ignoreHidden);\n};\n\n/**\n    * Returns properties for multiple objects with an optional filter on which properties to retrieve.\n    *\n    * @param {int[]} dbIds - IDs of the nodes to return the properties for.\n    * @param {object|undefined} options - Dictionary with options.\n    * @param {string[]} [options.propFilter] - Array of property names to return values for. Use null for no filtering.\n    * Filter applies to \"name\" and \"externalId\" fields also.\n    * @param {boolean} [options.ignoreHidden] - Ignore hidden properties\n    * @param {boolean} [options.needsExternalId] - Ensures loading of externalID table if necessary. This may consume a lot of memory. Only use if you really need externalIds.\n    * @param {function} onSuccessCallback - This method is called when request for property db succeeds.\n    * @param {function} onErrorCallback - This method is called when request for property db fails.\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#getBulkProperties2\n    */\nModel.prototype.getBulkProperties2 = function (dbIds, options, onSuccessCallback, onErrorCallback)\n{\n  var pdb = this.getPropertyDb();\n  if (!pdb) {\n    onErrorCallback && onErrorCallback();\n    return;\n  }\n\n  pdb.getBulkProperties2(dbIds, options, onSuccessCallback, onErrorCallback);\n};\n\n/**\n    * Returns an object with key values being dbNodeIds and values externalIds.\n    * Useful to map LMV node ids to Fusion node ids.\n    *\n    * @param {function} onSuccessCallback - This method is called when request for property db succeeds.\n    * @param {function} onErrorCallback - This method is called when request for property db fails.\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#getExternalIdMapping\n    */\nModel.prototype.getExternalIdMapping = function (onSuccessCallback, onErrorCallback)\n{\n  var pdb = this.getPropertyDb();\n\n  if (!pdb) {\n    onErrorCallback && onErrorCallback();\n    return;\n  }\n\n  pdb.getExternalIdMapping(onSuccessCallback, onErrorCallback);\n};\n\n/**\n    * Returns an object with key values being layer names, pointing to Arrays containing dbIds.\n    *\n    * @param {function} onSuccessCallback - This method is called when request for property db succeeds.\n    * @param {function} onErrorCallback - This method is called when request for property db fails.\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#getLayerToNodeIdMapping\n    */\nModel.prototype.getLayerToNodeIdMapping = function (onSuccessCallback, onErrorCallback)\n{\n  var pdb = this.getPropertyDb();\n\n  if (!pdb) {\n    onErrorCallback && onErrorCallback();\n    return;\n  }\n\n  pdb.getLayerToNodeIdMapping(onSuccessCallback, onErrorCallback);\n};\n\n\n/**\n    * Asyncronous operation that gets a reference to the object tree.\n    *\n    * You can use the model object tree to get information about items in the model.  The tree is made up\n    * of nodes, which correspond to model components such as assemblies or parts.\n    *\n    * @param {Callbacks#onObjectTreeSuccess} [onSuccessCallback] - Success callback invoked once the object tree is available.\n    * @param {Callbacks#onGenericError} [onErrorCallback] - Error callback invoked when the object tree is not found available.\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#getObjectTree\n    */\nModel.prototype.getObjectTree = function (onSuccessCallback, onErrorCallback)\n{\n  // Scene builder has an instance tree but no property database.\n  var it = this.getData().instanceTree;\n  if (it) {\n    onSuccessCallback(it);\n    return;\n  }\n\n  var pdb = this.getPropertyDb();\n\n  if (!pdb) {\n    onErrorCallback && onErrorCallback();\n    return;\n  }\n\n  pdb.getObjectTree(onSuccessCallback, onErrorCallback);\n};\n\n/**\n    * Returns ``true`` only when the object tree is loaded into memory.\n    * Will return ``false`` while the object tree is still loading,\n    * or when the object tree fails to load.\n    *\n    * @returns {boolean}\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#isObjectTreeLoaded\n    */\nModel.prototype.isObjectTreeLoaded = function ()\n{\n  var pdb = this.getPropertyDb();\n\n  if (!pdb) {\n    return false;\n  }\n\n  return pdb.isObjectTreeLoaded();\n};\n\n\n/**\n    * Async operation to search the object property database.\n    *\n    * @param {string} text - The search term (not case sensitive).\n    * @param {Callbacks#onSearchSuccess} onSuccessCallback - Invoked when the search results are ready.\n    * @param {Callbacks#onGenericError} onErrorCallback - Invoke when an error occured during search.\n    * @param {string[]} [attributeNames] - Restricts search to specific attribute names.\n    * @param {Object} [options] - Search options. Currently only supported option is searchHidden\n    * @param {boolean} [options.searchHidden=false] - Set to true to also search hidden properties\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#search\n    */\nModel.prototype.search = function (text, onSuccessCallback, onErrorCallback, attributeNames)\n{var options = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : { searchHidden: false };\n  var pdb = this.getPropertyDb();\n\n  if (!pdb) {\n    onErrorCallback && onErrorCallback();\n    return;\n  }\n\n  pdb.searchProperties(text, attributeNames, onSuccessCallback, onErrorCallback, options);\n};\n\n/**\n    * Searches the property database for all dbIds that contains a specific property name.\n    *\n    * @param {string} propertyName - The property name to search for (case sensitive).\n    * @returns {Promise} that resolves with an Array of dbIds containing the specified property.\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#findProperty\n    */\nModel.prototype.findProperty = function (propertyName)\n{\n  var pdb = this.getPropertyDb();\n\n  if (!pdb) {\n    return Promise.reject('Model doesn\\'t have any properties.');\n  }\n\n  return pdb.findProperty(propertyName);\n};\n\n\n//========================================================\n// Utility functions used by page->model conversions below\n\nvar repairViewportMatrix = function repairViewportMatrix(elements) {\n  // Sometimes the rows of matrix are swapped\n  var precision = 1e-3;\n  var e = elements;\n  if (Math.abs(e[0]) < precision) {\n    if (Math.abs(e[4]) > precision) {\n      // swap row 1 and row 2\n      for (var i = 0; i < 4; i++) {\n        var temp = e[i];\n        e[i] = e[i + 4];\n        e[i + 4] = temp;\n      }\n    } else\n    {\n      // swap row 1 and row 3\n      for (var i = 0; i < 4; i++) {\n        var temp = e[i];\n        e[i] = e[i + 8];\n        e[i + 8] = temp;\n      }\n    }\n  }\n  if (Math.abs(e[5]) < precision) {\n    // swap row 2 and row 3\n    for (var i = 4; i < 8; i++) {\n      var temp = e[i];\n      e[i] = e[i + 4];\n      e[i + 4] = temp;\n    }\n  }\n};\n\n\nvar pointInContour = function pointInContour(x, y, cntr, pts) {\n  var yflag0, yflag1;\n  var vtx0X, vtx0Y, vtx1X, vtx1Y;\n\n  var inside_flag = false;\n\n  // get the last point in the polygon\n  vtx0X = pts[cntr[cntr.length - 1]].x;\n  vtx0Y = pts[cntr[cntr.length - 1]].y;\n\n  // get test bit for above/below X axis\n  yflag0 = vtx0Y >= y;\n\n  for (var j = 0, jEnd = cntr.length; j < jEnd; ++j)\n  {\n    vtx1X = pts[cntr[j]].x;\n    vtx1Y = pts[cntr[j]].y;\n\n    yflag1 = vtx1Y >= y;\n\n    // Check if endpoints straddle (are on opposite sides) of X axis\n    // (i.e. the Y's differ); if so, +X ray could intersect this edge.\n    // The old test also checked whether the endpoints are both to the\n    // right or to the left of the test point.  However, given the faster\n    // intersection point computation used below, this test was found to\n    // be a break-even proposition for most polygons and a loser for\n    // triangles (where 50% or more of the edges which survive this test\n    // will cross quadrants and so have to have the X intersection computed\n    // anyway).  I credit Joseph Samosky with inspiring me to try dropping\n    // the \"both left or both right\" part of my code.\n    if (yflag0 != yflag1)\n    {\n      // Check intersection of pgon segment with +X ray.\n      // Note if >= point's X; if so, the ray hits it.\n      // The division operation is avoided for the \">=\" test by checking\n      // the sign of the first vertex wrto the test point; idea inspired\n      // by Joseph Samosky's and Mark Haigh-Hutchinson's different\n      // polygon inclusion tests.\n      if ((vtx1Y - y) * (vtx0X - vtx1X) >=\n      (vtx1X - x) * (vtx0Y - vtx1Y) == yflag1)\n      {\n        inside_flag = !inside_flag;\n      }\n    }\n\n    // move to the next pair of vertices, retaining info as possible\n    yflag0 = yflag1;\n    vtx0X = vtx1X;\n    vtx0Y = vtx1Y;\n  }\n\n  return inside_flag;\n};\n\nModel.prototype.pointInPolygon = function (x, y, contours, points) {\n  var inside = false;\n\n  for (var i = 0; i < contours.length; i++) {\n\n    if (pointInContour(x, y, contours[i], points))\n    inside = !inside;\n  }\n\n  return inside;\n};\n\n\n\n\nModel.prototype.getPageToModelTransform = function (vpId) {\n\n  var data = this.getData();\n  if (data.pageToModelTransform) {\n    return data.pageToModelTransform;\n  }\n\n  var f2d = data;\n  var metadata = f2d.metadata;\n  var pd = metadata.page_dimensions;\n\n  var vp = f2d.viewports && f2d.viewports[vpId];\n  if (!vp) {\n    return new THREE.Matrix4();\n  }\n\n  if (!f2d.viewportTransforms)\n  f2d.viewportTransforms = new Array(f2d.viewports.length);\n\n  //See if we already cached the matrix\n  var cached = f2d.viewportTransforms[vpId];\n  if (cached)\n  return cached;\n\n  //Do the matrix composition in double precision using LmvMatrix,\n  //which supports that optionally\n  var pageToLogical = new LmvMatrix4(true).set(\n  pd.logical_width / pd.page_width, 0, 0, pd.logical_offset_x,\n  0, pd.logical_height / pd.page_height, 0, pd.logical_offset_y,\n  0, 0, 1, 0,\n  0, 0, 0, 1);\n\n\n  var modelToLogicalArray = vp.transform.slice();\n\n  repairViewportMatrix(modelToLogicalArray);\n\n  var modelToLogical = new LmvMatrix4(true);\n  modelToLogical.elements.set(modelToLogicalArray);\n\n  var logicalToModel = new LmvMatrix4(true);\n  logicalToModel.getInverse(modelToLogical);\n\n  logicalToModel.multiply(pageToLogical);\n\n  //Cache for future use\n  f2d.viewportTransforms[vpId] = logicalToModel;\n\n  return logicalToModel;\n};\n\n\n/**\n    * Paper coordinates to Model coordinates\n   */\nModel.prototype.pageToModel = function (point1, point2, vpId, inverse) {\n\n  var vpXform = this.getPageToModelTransform(vpId);\n  if (inverse) {\n    var inverseVpXform = new THREE.Matrix4();\n    inverseVpXform.getInverse(vpXform);\n    vpXform = inverseVpXform;\n  }\n\n  function applyToPoint(point) {\n    if (point) {\n      var modelPt = new THREE.Vector3().set(point.x, point.y, 0).applyMatrix4(vpXform);\n      point.x = modelPt.x;\n      point.y = modelPt.y;\n    }\n  }\n\n  applyToPoint(point1);\n  applyToPoint(point2);\n};\n\n\n/**\n    * Find the viewports that point lies in its bounds.\n   */\nModel.prototype.pointInClip = function (point, vpId) {\n\n  var clips = this.getData().clips;\n  var clipIds = []; // This will store ids of clip where point lies in\n\n  // clip index starts at 1\n  for (var i = 1; i < clips.length; i++) {\n    // Don't need to check the point's own viewport's clip, it must be in that clip.\n    if (i === vpId)\n    continue;\n\n    var contour = [];\n    var contours = [];\n    var contourCounts = clips[i].contourCounts;\n    var points = clips[i].points;\n    var index = 0;\n    var pts = [];\n\n    // Reorganize contour data\n    for (var j = 0; j < contourCounts.length; j++) {\n      for (var k = 0; k < contourCounts[j]; k++) {\n        contour.push(index);\n        index++;\n      }\n      contours.push(contour);\n      contour = [];\n    }\n    for (var j = 0; j < points.length; j += 2) {\n      var pt = { x: points[j], y: points[j + 1] };\n      pts.push(pt);\n    }\n\n    var inside = this.pointInPolygon(point.x, point.y, contours, pts);\n    if (inside)\n    clipIds.push(i);\n  }\n\n  return clipIds;\n};\n\nModel.prototype.getClip = function (vpId) {\n\n  var clips = this.getData().clips;\n\n  var contour = [];\n  var contours = [];\n  var contourCounts = clips[vpId].contourCounts;\n  var points = clips[vpId].points;\n  var index = 0;\n  var pts = [];\n\n  // Reorganize contour data\n  for (var j = 0; j < contourCounts.length; j++) {\n    for (var k = 0; k < contourCounts[j]; k++) {\n      contour.push(index);\n      index++;\n    }\n    contours.push(contour);\n    contour = [];\n  }\n  for (var j = 0; j < points.length; j += 2) {\n    var pt = { x: points[j], y: points[j + 1] };\n    pts.push(pt);\n  }\n\n  return { \"contours\": contours, \"points\": pts };\n};\n\n\n/**\n    * Return topology index of the fragment.\n    * @param {number} fragId - Fragment ID.\n    * @returns {number} Topology index.\n    */\nModel.prototype.getTopoIndex = function (fragId) {\n  var data = this.getData();\n  if (data && data.fragments) {\n    var topoIndexes = data.fragments.topoIndexes;\n    if (topoIndexes) {\n      return topoIndexes[fragId];\n    }\n  }\n};\n\n/**\n    * Return topology data of one fragment.\n    * \n    * Requires topology data to have been fetched with  \n    * {@link Autodesk.Viewing.Model#fetchTopology|fetchTopology()}.\n    * \n    * @param {number} index - Topology index.\n    * @returns {object} Topology data.\n    * \n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#getTopology\n    */\nModel.prototype.getTopology = function (index) {\n  if (this.topology) {\n    return this.topology[index];\n  }\n  return null;\n};\n\n/**\n    * See also {@link Autodesk.Viewing.Model#fetchTopology|fetchTopology()}.\n    * @returns {boolean} true if topology data has been downloaded and is available in memory\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#hasTopology\n    */\nModel.prototype.hasTopology = function () {\n  return !!this.topology;\n};\n\n/**\n    * Downloads the topology file, if one is available.\n    * The file may not get downloaded if the topology content size in memory is bigger\n    * than a specified limit (100 MB by default, 20 MB for mobile).\n    * \n    * @param {number} [maxSizeMB] - Maximum uncompressed topology size allowed (in MegaBytes).\n    * \n    * @returns {Promise} that resolves with the topology object.\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#fetchTopology\n    */\nModel.prototype.fetchTopology = function (maxSizeMB) {\n\n  // Debugging\n  /*return new Promise(function(resolve, reject){\n       function aaa() {\n           if (avp.debug_topo_yes) {\n               resolve([]);\n               return;\n           }\n           if (avp.debug_topo_no) {\n               reject('Buuuu');\n               return;\n           }\n           requestAnimationFrame(aaa);\n       }\n       aaa();\n   });\n  // */\n  // Debugging end\n\n  if (this.topology) // Already downloaded\n    return Promise.resolve(this.topology);\n\n  var data = this.getData();\n  if (!data.topologyPath) // No path from where to download it\n    return Promise.reject({ error: \"no-topology\" });\n\n  var maxTopologyFileSizeMB = maxSizeMB || (isMobileDevice() ? 20 : 100); // MegaBytes; Non-gzipped\n  if (data.topologySizeMB > maxTopologyFileSizeMB) // File is too big to download.\n    return Promise.reject({ error: \"topology-too-big\", limitMB: maxTopologyFileSizeMB, topologyMB: data.topologySizeMB });\n\n  if (!this.topologyPromise) // Fetch it!\n    {\n      var that = this;\n      this.topologyPromise = new Promise(function (resolve, reject) {\n        that.loader.fetchTopologyFile(that.getData().topologyPath, function onComplete(topoData) {\n          if (topoData && topoData.topology) {\n            that.topology = topoData.topology;\n            resolve(topoData.topology);\n          } else {\n            reject(topoData);\n          }\n        });\n      });\n    }\n\n  return this.topologyPromise;\n};\n\n/**\n    * @returns {boolean} true if the model loaded contains at least 1 fragment.\n    * \n    * @memberof Autodesk.Viewing.Model\n    * @alias Autodesk.Viewing.Model#hasGeometry\n    */\nModel.prototype.hasGeometry = function () {\n  var data = this.getData();\n  if (data) {\n    if (data.isLeaflet) {// see LeafletLoader.js\n      return true;\n    }\n    if (data.isSceneBuilder) {\n      return true; // We claim scene builder scenes are never empty, even if it contains no geometry\n    }\n    return data.fragments.length > 0;\n  }\n  return false;\n};\n\n/**\n    * Returns the FragmentPointer of the specified fragId in the model.\n    * This method returns null if the fragId is not passed in.\n    * \n    * @param {number} fragId - fragment id in the model\n    * @returns {Autodesk.Viewing.Private.FragmentPointer|null} returns the FragmentPointer\n    * \n    * @alias Autodesk.Viewing.Model#getFragmentPointer\n    */\nModel.prototype.getFragmentPointer = function (fragId) {\n  if (!fragId) return null;\n  return new FragmentPointer(this.getFragmentList(), fragId);\n};\n\n/**\n    * Returns a shallow copy of the model.\n    * All the inner state (Fragments, Geometries etc.) are shared.\n    *\n    * @returns {Autodesk.Viewing.Model} returns a shallow copy of the model.\n    * \n    * @alias Autodesk.Viewing.Model#clone\n    */\nModel.prototype.clone = function () {\n  var clone = new Model(this.myData);\n  clone.topology = this.topology;\n  clone.topologyPromise = this.topologyPromise;\n  clone.svfUUID = this.svfUUID;\n  clone.defaultCameraHash = this.defaultCameraHash;\n  clone.loader = this.loader;\n  clone.setInnerAttributes(this.getInnerAttributes());\n\n  return clone;\n};\n\n/**\n    * Returns the URN of the document model.\n    * @returns {string} Model URN.\n    */\nModel.prototype.getSeedUrn = function () {var _this$loader2;\n  return ((_this$loader2 = this.loader) === null || _this$loader2 === void 0 ? void 0 : _this$loader2.svfUrn) || \"\";\n};\n\n/**\n    * Check if node exist in instance tree or fragment list. \n    * @param {number} dbId - can be a single dbId or node with children (as appears in Model Browser)\n    * @return {boolean} nodeExists - false if no elements found\n    */\nModel.prototype.isNodeExists = function (dbId) {\n  var dbIdExists;\n  var it = this.getInstanceTree();\n\n  if (it) {\n    it.enumNodeChildren(dbId, function (dbId) {\n      it.enumNodeFragments(dbId, function (fragId) {\n        dbIdExists = true;\n      });\n    }, true);\n  } else\n  {\n    var fragments = this.getFragmentList().fragments;\n    if (fragments.dbId2fragId[dbId]) {\n      dbIdExists = true;\n    }\n  }\n  return !!dbIdExists;\n};\n\nModel.prototype.getModelKey = function () {\n  var documentNode = this.getDocumentNode();\n\n  if (documentNode) {\n    return documentNode.getModelKey();\n  } else {\n    return this.getData().urn;\n  }\n};","\nimport { logger } from \"../logger/Logger\";\nimport * as et from \"./EventTypes\";\n\nvar BatchSize = 1024;\nvar ZeroLayers = { name: 'root', id: 'root', isLayer: false, children: [], childCount: 0 };\n\nexport function ModelLayers(viewer) {\n\n  this.viewer = viewer;\n  this.matman = viewer.matman();\n  this.model = null;\n  this.root = null;\n  this.initialized = false;\n\n  this.layerToIndex = {};\n  this.indexToLayer = [null];\n\n  this.nodeToLayer = [];\n}\n\nvar proto = ModelLayers.prototype;\n\nproto.addModel = function (model) {var defer3d = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;\n  // TODO: Only single model supported, extend to support several.\n  if (this.initialized) {\n    return;\n  }\n\n  // Loading 3d layers does propdb loading, \n  // which is deferred to LayerManager extension\n  if (!model.is2d() && defer3d) {\n    return;\n  }\n\n  var onCreateLayers = function (root) {\n\n    var data = this.model.getData();\n    var tree = data.instanceTree;\n\n    if (!root) {\n      return;\n    }\n\n    // Normalize children array, some roots come without children.\n    root.children = root.children || [];\n\n    // Copy children into flat array\n    var childrenFlat = _flattenChildren(root.children);\n    root.childCount = childrenFlat.length;\n\n    // Layer to index, index to layer.\n    this.indexToLayer = new Array(root.childCount + 1);\n    this.indexToLayer[0] = null;\n\n    for (var i = 0; i < root.childCount; ++i) {\n\n      var layer = childrenFlat[i];\n      var visible = layer.visible == undefined ? true : layer.visible;\n\n      this.layerToIndex[layer.name] = layer.index;\n      this.indexToLayer[layer.index] = /*layerInfo*/{\n        layer: layer,\n        visible: visible // copy visibilty to avoid altering the initial state\n      };\n    }\n\n    // The rest is needed only for 3d models.        \n    if (this.model.is2d()) {\n      return;\n    }\n\n    // Map node ids with their corresponding layers, only if present.\n    if (root.childCount === 0) {\n      return;\n    }\n\n    // Assign nodes to layers.\n    this.nodeToLayer = root.childCount <= 256 ?\n    new Uint8Array(tree.nodeAccess.getNumNodes()) :\n    new Uint16Array(tree.nodeAccess.getNumNodes());\n\n\n    var onLayerNodes = function (mapping) {\n\n      if (!this.model)\n      return;\n\n      var data = this.model.getData();\n      var tree = data.instanceTree;\n\n      for (var layerName in mapping) {\n        if (mapping.hasOwnProperty(layerName)) {\n          var layerIndex = this.layerToIndex[layerName];\n          var ids = mapping[layerName];\n          for (var i = 0, len = ids.length; i < len; ++i) {\n            var nodeIndex = tree.nodeAccess.getIndex(ids[i]);\n            this.nodeToLayer[nodeIndex] = layerIndex;\n          }\n        }\n      }\n    }.bind(this);\n\n    var onError = function () {\n      logger.warn(\"ModelLayers error: coudn't get layers from property database.\");\n    }.bind(this);\n\n    model.getLayerToNodeIdMapping(onLayerNodes, onError);\n  }.bind(this);\n\n  var onCreateLayersComplete = function (root) {\n    this.root = root;\n    this.initialized = true;\n    this.activateLayerState(\"Initial\");\n    this.viewer.api.dispatchEvent({\n      type: et.MODEL_LAYERS_LOADED_EVENT,\n      model: model,\n      root: root });\n\n  }.bind(this);\n\n  this.model = model;\n  (model.is2d() ? get2dLayers(model) : get3dLayers(model)).\n  then(function (root) {\n    onCreateLayers(root);\n    onCreateLayersComplete(root);\n  }).\n  catch(function (error) {\n    logger.warn(error);\n    onCreateLayersComplete(ZeroLayers);\n  });\n};\n\nproto.removeModel = function (model) {\n\n  if (this.model !== model) {\n    return;\n  }\n\n  this.model = null;\n  this.root = null;\n  this.initialized = false;\n\n  this.layerToIndex = {};\n  this.indexToLayer = [null];\n\n  this.nodeToLayer = [];\n};\n\nproto.getRoot = function () {\n\n  if (!this.initialized) {\n    logger.warn(\"Autodesk.Viewing.ModelLayers.getRoot couldn't peform action, layers are still being loaded\");\n  }\n  return this.root;\n};\n\nproto.showAllLayers = function () {\n  if (!this.initialized) {\n    logger.warn(\"Autodesk.Viewing.ModelLayers.showAllLayers couldn't peform action, layers are still being loaded\");\n    return;\n  }\n  showAllLayers(this, true);\n};\n\nproto.hideAllLayers = function () {\n  if (!this.initialized) {\n    logger.warn(\"Autodesk.Viewing.ModelLayers.hideAllLayers couldn't peform action, layers are still being loaded\");\n    return;\n  }\n  showAllLayers(this, false);\n};\n\n/**\n    * @param {object|number} layer - The layer object or index.\n    * @returns {boolean} true is the layer is visible. For parent layers, it returns true when at least one child layer is visible.\n    */\nproto.isLayerVisible = function (layer) {\n\n  if (!this.initialized) {\n    logger.warn(\"Autodesk.Viewing.ModelLayers.isLayerVisible couldn't peform action, layers are still being loaded\");\n    return false;\n  }\n\n  var layerIndex = getLayerIndex(this, layer);\n  var layerInfo = this.indexToLayer[layerIndex];\n\n  if (_isParentLayerInfo(layerInfo)) {\n    // It is visibile if at least one child layer is visible\n    var children = layerInfo.layer.children;\n    for (var i = 0; i < children.length; ++i) {\n      var childIndex = children[i].index;\n      var childLayerInfo = this.indexToLayer[childIndex];\n      if (childLayerInfo.visible) {\n        return true;\n      }\n    }\n    return false;\n  }\n\n  return layerInfo.visible;\n};\n\n/**\n    * @param {object|number|object[]|number[]} layer - The layer object or index.\n    * @param {boolean} visible\n    */\nproto.setLayerVisible = function (layers, visible) {\n\n  if (!this.initialized) {\n    logger.warn(\"Autodesk.Viewing.ModelLayers.setLayersVisible couldn't peform action, layers are still being loaded\");\n    return;\n  }\n\n  // Get layer indices.\n  var layerIndices = Array.isArray(layers) ? layers : [layers];\n  layerIndices = layers.map(function (layer) {\n    return getLayerIndex(this, layer);\n  }.bind(this));\n\n  // Append child indices for each parent index encountered.\n  // It's not a problem including duplicate indices.\n  var len = layerIndices.length;\n  for (var i = 0; i < len; ++i) {\n    var layerIndex = layerIndices[i];\n    var _layerInfo = this.indexToLayer[layerIndex];\n    if (_isParentLayerInfo(_layerInfo)) {\n      // append children indices\n      var children = _layerInfo.layer.children;\n      children.forEach(function (childData) {\n        layerIndices.push(childData.index);\n      });\n    }\n  }\n\n\n  // Hide / Show nodes.\n  var model = this.model;\n  var indexToLayer = this.indexToLayer;\n\n  if (model.is2d()) {\n    this.matman.setLayerVisible(layerIndices, visible, model.id);\n    this.viewer.invalidate(true);\n  } else {\n    var skiptable = indexToLayer.map(function (layerInfo) {\n      return !!(layerInfo === null || layerIndices.indexOf(layerInfo.layer.index) === -1 || layerInfo.visible === visible);\n    });\n\n    var nodeIdBatch = [];\n    var action = visible ?\n    this.viewer.visibilityManager.show :\n    this.viewer.visibilityManager.hide;\n\n    forEachNode(this, function (dbId, layerIndex) {\n      if (skiptable[layerIndex]) {\n        return;\n      }\n\n      nodeIdBatch.push(dbId);\n\n      if (nodeIdBatch.length === BatchSize) {\n        action(nodeIdBatch, model);\n        nodeIdBatch.length = 0;\n      }\n    });\n\n    nodeIdBatch.length > 0 && action(nodeIdBatch, model);\n  }\n\n  // Mark layers as visible / invisible.\n  var layerIndicesCount = layerIndices.length;\n  for (var i = 0; i < layerIndicesCount; ++i) {\n    var layerInfo = this.indexToLayer[layerIndices[i]];\n    if (layerInfo) {\n      layerInfo.visible = visible;\n    }\n  }\n};\n\nproto.getVisibleLayerIndices = function () {\n\n  if (!this.initialized) {\n    logger.warn(\"Autodesk.Viewing.ModelLayers.getVisibleLayerIndices couldn't peform action, layers are still being loaded\");\n    return [];\n  }\n\n  var visibleLayerIndices = [];\n\n  var indexToLayer = this.indexToLayer;\n  var indexTolayerCount = indexToLayer.length;\n\n  for (var i = 1; i < indexTolayerCount; ++i) {\n    var layerInfo = indexToLayer[i];\n    if (layerInfo && layerInfo.visible && !_isParentLayerInfo(layerInfo)) {\n      visibleLayerIndices.push(layerInfo.layer.index);\n    }\n  }\n\n  return visibleLayerIndices;\n};\n\nproto.allLayersVisible = function () {\n  // Before init, assume all layers to be visible (because setLayerVisible would not work yet anyway)\n  if (!this.initialized) {\n    return true;\n  }\n\n  var indexToLayer = this.indexToLayer;\n  var indexTolayerCount = indexToLayer.length;\n\n  for (var i = 1; i < indexTolayerCount; ++i) {\n    var layerInfo = indexToLayer[i];\n    if (layerInfo && !layerInfo.visible) {\n      return false;\n    }\n  }\n  return true;\n};\n\n/**\n    * Changes the active layer state.\n    * Get a list of all available layerStates and their active status through\n    *\n    * @param {string} stateName - Name of the layer state to activate.\n    */\nproto.activateLayerState = function (stateName) {\n\n  if (!this.initialized || !this.model) {\n    logger.warn(\"Autodesk.Viewing.ModelLayers.activateLayerState couldn't peform action, layers are still being loaded\");\n    return;\n  }\n\n  var metadata = this.model.getData().metadata;\n  var states = metadata ? metadata.layer_states : null;\n\n  if (this.model.is3d() || !states || !stateName) {\n    return;\n  }\n\n  var j;\n  for (j = 0; j < states.length; j++) {\n    if (states[j].name === stateName) {\n      break;\n    }\n  }\n\n  if (j < states.length) {\n    var layer_state = states[j];\n    var visible = layer_state.visible_layers;\n\n    var visibilityMap = {};\n    if (visible && 0 < visible.length) {\n      for (var k = 0; k < visible.length; k++) {\n        visibilityMap[visible[k]] = 1;}\n    }\n\n    var onlayers = [];\n    var offlayers = [];\n\n    for (var l in metadata.layers) {\n      var lname = metadata.layers[l].name;\n      l = l | 0x0;\n      if (visibilityMap[lname] === 1) {\n        onlayers.push(l);\n      } else {\n        offlayers.push(l);\n      }\n    }\n\n    this.setLayerVisible(onlayers, true);\n    this.setLayerVisible(offlayers, false);\n  }\n};\n\n/**\n    * Returns information for each layer state: name, description, active.\n    * Activate a state through {@link Autodesk.Viewing.Viewer3D#activateLayerState}.\n    * @returns {array}\n    */\nproto.getLayerStates = function () {\n\n  // Shallow equal.\n  function equal(a, b) {\n    var aProps = Object.getOwnPropertyNames(a);\n    var bProps = Object.getOwnPropertyNames(b);\n\n    if (aProps.length !== bProps.length) {\n      return false;\n    }\n\n    for (var i = 0; i < aProps.length; ++i) {\n      var propName = aProps[i];\n      if (a[propName] !== b[propName]) {\n        return false;\n      }\n    }\n\n    return true;\n  }\n\n  if (!this.initialized) {\n    logger.warn(\"Autodesk.Viewing.ModelLayers.getLayerStates couldn't peform action, layers are still being loaded\");\n    return null;\n  }\n\n  var model = this.model;\n  var metadata = model ? model.getData().metadata : null;\n  var layers = metadata ? metadata.layers : null;\n  var layer_states = metadata ? metadata.layer_states : null;\n\n  // 3d model or no layers or no layer states? Nothing to do.\n  if (this.model.is3d() || !layers || !layer_states) {\n    return null;\n  }\n\n  // Which layers are currently visible?\n  var layerName;\n  var layerNames = {};\n  var currentVisibleLayers = {};\n\n  for (var layer in layers) {\n    if (layers.hasOwnProperty(layer)) {\n      var index = parseInt(layer);\n      var defn = layers[layer];\n\n      layerName = typeof defn === 'string' ? defn : defn.name;\n      layerNames[layerName] = true;\n\n      if (this.isLayerVisible(index)) {\n        currentVisibleLayers[layerName] = true;\n      }\n    }\n  }\n\n  var layerStates = [];\n  for (var i = 0; i < layer_states.length; ++i) {\n    var layer_state = layer_states[i];\n    var visible_layers = layer_state.visible_layers;\n    var layerStateVisibleLayers = {};\n\n    // Ignore hidden layer states.\n    if (!layer_state.hidden) {\n      if (visible_layers && 0 < visible_layers.length) {\n        for (var j = 0; j < visible_layers.length; ++j) {\n          layerName = visible_layers[j];\n          // Ignore layers we don't know about.\n          if (layerNames.hasOwnProperty(layerName)) {\n            layerStateVisibleLayers[layerName] = true;\n          }\n        }\n      }\n\n      layerStates.push({\n        name: layer_state.name,\n        description: layer_state.description,\n        active: equal(currentVisibleLayers, layerStateVisibleLayers) });\n\n    }\n  }\n  return 0 < layerStates.length ? layerStates : null;\n};\n\n/**\n    * Retrieves layer root from model data.\n    *\n    * @returns {Promise} that resolves with an Array of layer objects.\n    * @private\n    */\nfunction get2dLayers(model) {\n\n  var data = model.getData();\n  var root = ZeroLayers;\n\n  if (data && data.layersRoot) {\n    root = data.layersRoot;\n  }\n\n  return Promise.resolve(root);\n};\n\n/**\n    * Scans the property database to find all available Layers.\n    * This feature is avilable for AutoCAD and DGN files.\n    *\n    * @returns {Promise} that resolves with an Array of layer objects.\n    * @private\n    */\nfunction get3dLayers(model) {\n\n  if (model.getData().loadOptions.skipPropertyDb) {\n    return Promise.resolve(null);\n  }\n\n  var pdb = model.getPropertyDb();\n  if (!pdb || model.getData().loadOptions.disable3DModelLayers) {\n    return Promise.resolve(ZeroLayers);\n  }\n  return pdb.findLayers();\n}\n\nfunction showAllLayers(self, show) {\n\n  var model = self.model;\n  var indexToLayer = self.indexToLayer;\n\n  // Hide / Show nodes.\n  if (model.is2d()) {\n    // Note that some files may not have layers at all, e.g., leaflets.\n    if (!model.getData().layerCount) {\n      return;\n    }\n    var layerIndices = [];\n    for (var layer in self.layerToIndex) {\n      layerIndices.push(self.layerToIndex[layer]);\n    }\n    self.matman.setLayerVisible(layerIndices, show, model.id);\n    self.viewer.invalidate(true);\n  } else {\n    var nodeIdBatch = [];\n    var action = show ?\n    self.viewer.visibilityManager.show :\n    self.viewer.visibilityManager.hide;\n\n    forEachNode(self, function (dbId, layerIndex) {\n      if (indexToLayer[layerIndex].visible === show) {\n        return;\n      }\n\n      nodeIdBatch.push(dbId);\n\n      if (nodeIdBatch.length === BatchSize) {\n        action(nodeIdBatch, model);\n        nodeIdBatch.length = 0;\n      }\n    });\n\n    nodeIdBatch.length > 0 && action(nodeIdBatch, model);\n  }\n\n  // Update layers state.\n  var indexToLayerCount = indexToLayer.length;\n  for (var i = 1; i < indexToLayerCount; ++i) {\n    var currentLayer = indexToLayer[i];\n    if (currentLayer) {\n      currentLayer.visible = show;\n    }\n  }\n}\n\nfunction forEachNode(self, callback) {\n\n  var nodeToLayer = self.nodeToLayer;\n\n  // if there are no layers, layerIndex is not set for any dbId and we are done.\n  if (!nodeToLayer || !nodeToLayer.length) {\n    return;\n  }\n\n  var access = self.model.getData().instanceTree.nodeAccess;\n\n  for (var dbId in access.dbIdToIndex) {\n    var dbIdIndex = access.dbIdToIndex[dbId];\n    var layerIndex = nodeToLayer[dbIdIndex] || 0;\n    if (layerIndex !== 0) {\n      callback(dbId | 0x0, layerIndex);\n    }\n  }\n};\n\n/**\n    * \n    * @param {*} self \n    * @param {*} layer \n    * @private\n    */\nfunction getLayerIndex(self, layer) {\n\n  if (typeof layer === 'number')\n  return layer;\n\n  return self.layerToIndex[layer.name || layer] || 0;\n}\n\n/**\n   * Parent layers are not considered layers.\n   * @param {object} layerInfo \n   * @private\n   */\nfunction _isParentLayerInfo(layerInfo) {\n  return !layerInfo.layer.isLayer;\n}\n\n\n/**\n   * For some 2D models, the layer metadata may contain child elements that\n   * contain additional children with more layers.\n   * This function flattens the data into a single array.\n   *\n   * @private\n   */\nfunction _flattenChildren(childrenArray) {\n\n  if (!childrenArray)\n  return [];\n\n  var ret = [];\n  var maxIndex = 0;\n  _traverse(childrenArray, function (child) {\n    ret.push(child);\n    if (child.isLayer) {\n      maxIndex = Math.max(maxIndex, child.index | 0);\n    }\n  });\n\n  // Assign a layer number value to parent nodes.\n  for (var i = 0; i < ret.length; ++i) {\n    if (!ret[i].isLayer) {\n      ret[i].index = ++maxIndex;\n    }\n  }\n\n  return ret;\n}\n\n/**\n   * @private\n   */\nfunction _traverse(array, callback) {\n  for (var i = 0; i < array.length; ++i) {\n    var elem = array[i];\n    callback(elem);\n    if (elem.children) {\n      _traverse(elem.children, callback);\n    }\n  }\n}","\n\"use strict\";\n\n// ModelMemoryTracker is a utility class to support applications to...\n//\n//  1. Estimate the overall memory consumption of all models in memory\n//  2. Decide when/how to free memory if memory is critical - based on LRU timestamps.\n//\n// Estimating means here to sum up the byte size of the largest arrays of geometry, instancetree, bvh etc.\n//\n// How to use:\n// If you just want to know the summed memory consumptions of all models, just call:\n//   estimateMemUsage(viewer)\n//\n// If you want to use LRU caching to decide when to unload invisible/unused models:\n//\n//  1. Create a memTracker instance at startup and call initialize once the viewer is available\n//\n//  2. Updating Timestamps:\n//     Whenever the set of 'models-in-use' change, call memTracker.updateModelTimestamps(modelsInUse).\n//\n//     This assigns/updates lru timestamps for all models to track which one to remove first when memory gets critical.\n//     'Models in use' include all models that shouldn't be deleted. This should always include all visible models,\n//     but may also include hidden ones that the application wants to protect from memory cleanup.\n//\n//  3. Cache cleanup:\n//     Cache cleanup should be called whenever \n//      a) memory consumption increased (e.g. model consolidated, all model geometry loaded)\n//      b) a previously used model changes to hidden/unused. (This may allow to unload it if a previous cleanup call failed, because there was nothing to remove)\n//\n\n\n// Default value for the amount of memory that we allow to consume before removing \n// models from memory.\nvar MB = 1024 * 1024;\nvar DefaultMemLimitInBytes = 1000 * MB;\n\n// Shortcut to get byteLength of an array/buffer that might be null\nfunction getByteLength(obj) {\n  return obj && obj.byteLength || 0;\n}\n\n// Summed byteSize of all arrays directly contained in Fragments struct\n// @param {Fragments} frags - referenced by otg/svfPackage and FragmentList\n// @returns {number}\nfunction getFragmentsBytes(frags) {\n  return (\n    getByteLength(frags.boxes) +\n    getByteLength(frags.transforms) +\n    getByteLength(frags.fragId2dbId) +\n    getByteLength(frags.geomDataIndexes) +\n    getByteLength(frags.materials));\n\n}\n\n// Summed byteSize of all arrays directly contained in FragmentList,\n// excluding those that are shared with Fragments.\n//\n// @param {FragmentList} fragList\n// @returns {number} Memory consumed by FragList (excluding data of fragments)\nfunction getFragmentListBytes(fragList) {\n  return (\n    getByteLength(fragList.geomids) +\n    getByteLength(fragList.materialids) +\n    getByteLength(fragList.vizflags) + (\n    // boxes/transforms may or may not be shared with fragments - depending on model type\n    fragList.boxes !== fragList.fragments.boxes ? getByteLength(fragList.boxes) : 0) + (\n    fragList.transforms !== fragList.fragments.transforms ? getByteLength(fragList.transforms) : 0));\n\n}\n\n// @param {BVHBuilder} bvh - as contained in otg/svfPackage\nfunction getBVHBytes(bvh) {\n\n  // bvh.nodes may either be an ArrayBuffer or a NodeArray.\n  // If it is a NodeArray, we use the nodesRaw Array to check the byte length\n  var nodes = bvh.nodes.nodesRaw ? bvh.nodes.nodesRaw : bvh.nodes;\n\n  return (\n    getByteLength(nodes) +\n    getByteLength(bvh.primitives));\n\n}\n\n// @param {InstanceTree}\nfunction getInstanceTreeBytes(instTree) {\n  var na = instTree.nodeAccess;\n  return (\n    getByteLength(na.children) +\n    getByteLength(na.nameSuffixes) +\n    getByteLength(na.names) +\n    getByteLength(na.nodeBoxes) +\n    getByteLength(na.nodes));\n\n}\n\n// Warn once when used for leaflets, because memory would currently underestimated for this case.\nvar _noLeafletSupportWarningShown = false;\n\n// Sums up memory consumption by each model - excluding shared geometry\n// @param {av.Model[]}\nfunction sumModelMemory(models) {\n  var avp = Autodesk.Viewing.Private;\n\n  var bytesTotal = 0;\n\n  for (var i = 0; i < models.length; i++) {\n    var model = models[i];\n    var data = model.getData();\n\n    // if model is consolidated, add costs of consolidation\n    var cons = model.getConsolidation();\n    if (cons) {\n      bytesTotal += cons.byteSize;\n    }\n\n    // TODO: Consider leaflets for mem tracking\n    if (model.isLeaflet()) {\n      if (!_noLeafletSupportWarningShown) {\n        console.warn(\"Memory tracking not implemented for leaflets.\");\n        _noLeafletSupportWarningShown = true;\n      }\n      continue;\n    }\n\n    // F2D and SVF have own geometry\n    if (!data.isOTG) {\n      var geomList = model.getGeometryList();\n      bytesTotal += geomList.geomMemory;\n    }\n\n    // FragmentData\n    var frags = data.fragments;\n    if (frags) {\n      bytesTotal += getFragmentsBytes(frags);\n    }\n\n    // FragmentList (excluding Fragments struct)\n    var fragList = model.getFragmentList();\n    if (fragList) {\n      bytesTotal += getFragmentListBytes(fragList);\n    }\n\n    // BVH\n    var bvh = data.bvh;\n    if (bvh) {\n      bytesTotal += getBVHBytes(bvh);\n    }\n\n    // InstanceTree\n    var it = data.instanceTree;\n    if (it) {\n      bytesTotal += getInstanceTreeBytes(it);\n    }\n  }\n\n  // Verify that result makes sense\n  if (!isFinite(bytesTotal)) {\n    // If you see this warning, some code may have changed, so that some memory check\n    // code used above needs to be updated as well.\n    avp.logger.warn('Memory estimate result was not a number');\n  }\n\n  return bytesTotal;\n}\n\n// Estimates summed memory usage by all models in memory (visible and hidden)\n//  @param {Viewer3D}\nexport function estimateMemUsage(viewer) {\n\n  // get memory consumed by shared otg geometry\n  var geomCache = viewer.impl.geomCache();\n  var sharedBytes = geomCache ? geomCache.byteSize : 0;\n\n  // get non-shared memory consumed by all models\n  var mq = viewer.impl.modelQueue();\n  var visibleModels = mq.getModels();\n  var hiddenModels = mq.getHiddenModels();\n  var memVisible = sumModelMemory(visibleModels);\n  var memHidden = sumModelMemory(hiddenModels);\n\n  return sharedBytes + memVisible + memHidden;\n}\n\n// Helper class to track memory consumptions and support applications to decide how many models to keep in memory.\n//  @param {Viewer3d} viewer\n//  @param {number}   [memoryLimit] - in bytes, default 1GB\nexport function ModelMemoryTracker(viewer, memoryLimit) {\n\n  var _viewer = viewer;\n\n  // Used for LRU timestamps to decide which models to unload first.\n  var _currentTimestamp = 0;\n\n  var _memLimit = memoryLimit || DefaultMemLimitInBytes;\n\n  // A model has latest timestamp if and only if it was among 'modelsInUse' on last onModelsChanged() call\n  // Addendum: in some cases a model is loaded as hidden (e.g. PixelCompare) but we still want to keep it in memory\n  // In that case we look for keepHiddenModel=true in the loadOptions.\n  function modelInUse(model) {var _model$getData;\n    return model.lruTimestamp === _currentTimestamp || ((_model$getData = model.getData()) === null || _model$getData === void 0 ? void 0 : _model$getData.loadOptions.keepHiddenModel);\n  }\n\n  // Determines candidates for memory cleanup. Returns a list of models\n  // that are currently not in-use, sorted by increasing lru timestamp\n  function getUnusedModels() {\n    // get all hidden models\n    var mq = _viewer.impl.modelQueue();\n    var hiddenModels = mq.getHiddenModels();\n\n    // collect all models that don't have latest timestamp\n    var unusedModels = [];\n    for (var i = 0; i < hiddenModels.length; i++) {\n      var model = hiddenModels[i];\n      if (!modelInUse(model)) {\n        unusedModels.push(model);\n      }\n    }\n\n    // sort by increasing timestamp\n    var byIncTimestamp = function byIncTimestamp(a, b) {\n      return a.lurTimestamp - b.lruTimestamp;\n    };\n    unusedModels.sort(byIncTimestamp);\n    return unusedModels;\n  }\n\n  // Called whenever the set of 'models in use' changes. The modelsInUse is an array of models that the application\n  // wants to keep in memory. This must include the set of visible models, but may also include hidden ones,\n  // e.g., if a model is hidden, but just about to fade in.\n  //  @param {av.Model[]}\n  this.updateModelTimestamps = function (modelsInUse) {\n    _currentTimestamp++;\n\n    // set latest timestamp for all used models\n    for (var i = 0; i < modelsInUse.length; i++) {\n      var model = modelsInUse[i];\n      model.lruTimestamp = _currentTimestamp;\n    }\n  };\n\n  this.memoryExceeded = function () {\n    var mem = estimateMemUsage(_viewer);\n    return mem >= _memLimit;\n  };\n\n  // @returns {number} memLimit in bytes\n  this.getMemLimit = function () {\n    return _memLimit;\n  };\n\n  // Checks if the memory limit is above the limit and unloads models if necessary.\n  // By default, this is done using viewer.impl.unloadModel(). Optionally, an application\n  // may customize the model unload to keep its data consistent.\n  //   @param {function(av.Model)} [unloadModelFunc] \n  this.cleanup = function (unloadModelFunc) {\n\n    // set default unload function if undefined\n    var unloadModel = unloadModelFunc || _viewer.impl.unloadModel.bind(_viewer.impl);\n\n    if (!this.memoryExceeded()) {\n      return;\n    }\n\n    // We need memory - get unused models for which we can remove resources.\n    var unusedModels = getUnusedModels();\n\n    // 1. Discard consolidations of unused models.\n    //    We will recompute them once a model gets visible again.\n    for (var i = 0; i < unusedModels.length; i++) {\n      var model = unusedModels[i];\n      if (model.isConsolidated) {\n        // Drop consolidation\n        model.unconsolidate();\n        if (!this.memoryExceeded()) {\n          return;\n        }\n      }\n    }\n\n    // 2. Remove hidden models to free memory\n    var geomCache = _viewer.impl.geomCache();\n    for (i = 0; i < unusedModels.length; i++) {\n\n      // unload next model\n      model = unusedModels[i];\n      unloadModel(model);\n\n      // Some geometries might be unused now.\n      // => Running geomCache cleanup again might gain something.\n      if (geomCache) {\n        geomCache.cleanup();\n      }\n\n      if (!this.memoryExceeded()) {\n        return;\n      }\n    }\n\n    // If we reach here, only visible models + reserved budget for shared geomCache is left.\n    // So, there is nothing we can remove anymore. Handling this case properly will require\n    // support to page-out parts of visible models.\n  };\n}","function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}\n// Implemented as a thin-wrapper around methods in Viewer3DImpl to manage scene overlays.\n\n/**\n * Provides a mechanism for adding custom meshes. These meshes are added into their\n * own overlay scenes, which are always rendered after the main scene.\n *\n * @alias Autodesk.Viewing.OverlayManager\n */\nexport var OverlayManager = /*#__PURE__*/function () {\n\n  // not documented\n  function OverlayManager(impl) {_classCallCheck(this, OverlayManager);\n    this.impl = impl;\n  }\n\n  /**\n     * @private\n     */_createClass(OverlayManager, [{ key: \"dtor\", value: function dtor()\n    {\n      this.impl = null;\n    }\n\n    /**\n       * Creates a scene that is always rendered *after* the main scene.\n       * It is rendered into a separate buffer when each frame of the main scene is drawn.\n       * The buffer is then composited over the main scene.\n       * If it is enabled, the overlay scenes use the main scene depth buffer for the depth testing,\n       * to allow the overlay to appear in the main scene.\n       * \n       * @param {string} name - scene identifier\n       * @returns {boolean} - true if the overlay was added or already exists, false otherwise\n       *\n       * @alias Autodesk.Viewing.OverlayManager#addScene\n       */ }, { key: \"addScene\", value: function addScene(\n    name) {\n      if (!name)\n      return false;\n\n      if (this.impl.overlayScenes.hasOwnProperty(name))\n      return true;\n\n      this.impl.createOverlayScene(name);\n      return true;\n    }\n\n    /**\n       * Removes a scene along with all the meshes in it.\n       * \n       * @param {string} name - scene identifier\n       * @returns {boolean} - true if the overlay was removed or if it doesn't exist\n       *\n       * @alias Autodesk.Viewing.OverlayManager#removeScene\n       */ }, { key: \"removeScene\", value: function removeScene(\n    name) {\n      if (!name)\n      return false;\n\n      this.impl.removeOverlayScene(name);\n      return true;\n    }\n\n    /**\n       * Removes all meshes from a scene.\n       *\n       * @param {string} name - scene identifier\n       *\n       * @alias Autodesk.Viewing.OverlayManager#clearScene\n       */ }, { key: \"clearScene\", value: function clearScene(\n    name) {\n      this.impl.clearOverlay(name);\n    }\n\n    /**\n       * Checks whether a scene already exists\n       * \n       * @param {string} name - scene identifier\n       * @returns {boolean} - true the scene exists\n       *\n       * @alias Autodesk.Viewing.OverlayManager#hasScene\n       */ }, { key: \"hasScene\", value: function hasScene(\n    name) {\n      if (!name)\n      return false;\n      return this.impl.overlayScenes.hasOwnProperty(name);\n    }\n\n    /**\n       * Inserts one or more custom THREE.Mesh into an existing scene.\n       * \n       * @param {THREE.Mesh|Array} mesh - A mesh instance or an Array of them.\n       * @param {string} sceneName - Name of an existing scene.\n       * @returns {boolean} - true if the mesh was added to the scene \n       * \n       * @example\n       *      // Create a new mesh\n       *      const geometry = new THREE.SphereGeometry(10, 8, 8);\n       *      const material = new THREE.MeshBasicMaterial({ color: 0x336699 });\n       *      const mesh = new THREE.Mesh(geometry, material);\n       *      mesh.position.x = 1.0; mesh.position.y = 2.0; mesh.position.z = 3.0;\n       *      // Add scene and mesh\n       *      addScene('my_scene');\n       *      addMesh([mesh], 'my_scene');\n       *\n       * @alias Autodesk.Viewing.OverlayManager#addMesh\n       */ }, { key: \"addMesh\", value: function addMesh(\n    mesh, sceneName) {\n      if (!mesh || !sceneName || !this.impl.overlayScenes.hasOwnProperty(sceneName))\n      return false;\n\n      mesh = Array.isArray(mesh) ? mesh : [mesh];\n      this.impl.addMultipleOverlays(sceneName, mesh);\n      return true;\n    }\n\n\n    /**\n       * Removes one or more custom THREE.Mesh from an existing scene.\n       * Developers are responsible for disposing the material and geometry after the mesh is removed.\n       * \n       * @param {THREE.Mesh|Array} mesh - A mesh instance or an Array of them.\n       * @param {string} sceneName - Name of the scene the mesh(es) belong to.\n       * @returns {boolean} - true if the mesh (or meshes) was removed.\n       *\n       * @alias Autodesk.Viewing.OverlayManager#removeMesh\n       */ }, { key: \"removeMesh\", value: function removeMesh(\n    mesh, sceneName) {\n      if (!mesh || !sceneName || !this.impl.overlayScenes.hasOwnProperty(sceneName))\n      return false;\n\n      mesh = Array.isArray(mesh) ? mesh : [mesh];\n      this.impl.removeMultipleOverlays(sceneName, mesh);\n      return true;\n    }\n\n    /**\n       * Checks whether a mesh is already part of a scene.\n       *\n       * @param {THREE.Mesh} mesh - The mesh instance.\n       * @param {string} sceneName - Name of the scene to check against.\n       * @returns {boolean} - true if the mesh belongs to the scene.\n       *\n       * @alias Autodesk.Viewing.OverlayManager#hasMesh\n       */ }, { key: \"hasMesh\", value: function hasMesh(\n    mesh, sceneName) {\n      var overlay = this.impl.overlayScenes[sceneName];\n      if (!overlay)\n      return false;\n\n      var children = overlay.scene.children;\n      for (var i = 0, len = children.length; i < len; ++i) {\n        if (children[i] === mesh)\n        return true;\n      }\n      return false;\n    } }]);return OverlayManager;}();","/**\n * Contains viewer setting preference names for 3D models.\n * @typedef {Object} Prefs3D\n * @property {string} VIEW_CUBE - Sets the visibility of the viewcube.\n * @property {string} VIEW_CUBE_COMPASS - Sets the visibility of the viewcube compass. The compass will only be displayed if model contains orientation data.\n * @property {string} VIEW_TYPE - Sets the view to orthographic or perspective.\n * @property {string} ALWAYS_USE_PIVOT - Orbit controls always orbit around the currently set pivot point.\n * @property {string} ZOOM_TOWARDS_PIVOT - Default direction for camera dolly (zoom) operations to be towards the camera pivot point.\n * @property {string} SELECTION_SETS_PIVOT - Sets selection / un-selection action to automatically reset the orbit pivot to be the center of the multiple selection.\n * @property {string} REVERSE_HORIZONTAL_LOOK_DIRECTION - Sets a view navigation option to reverse the default direction for horizontal look operations.\n * @property {string} REVERSE_VERTICAL_LOOK_DIRECTION - Sets a view navigation option to reverse the default direction for vertical look operations.\n * @property {string} ORBIT_PAST_WORLD_POLES - Set a view navigation option to allow the orbit controls to move the camera beyond the north and south poles (world up/down direction).\n * @property {string} CLICK_TO_SET_COI - Modify the default click behavior for the viewer.\n * @property {string} GHOSTING - Toggles ghosting during search and isolate.\n * @property {string} OPTIMIZE_NAVIGATION - Toggles whether the navigation should be optimized for performance.\n * @property {string} AMBIENT_SHADOWS - Enables or disables ambient shadows.\n * @property {string} ANTIALIASING - Enables or disables antialiasing.\n * @property {string} GROUND_SHADOW - Toggles ground shadow.\n * @property {string} GROUND_REFLECTION - Toggles ground reflection.\n * @property {string} LINE_RENDERING - Hides all lines in the scene.\n * @property {string} EDGE_RENDERING - Turns edge topology display on/off (where available).\n * @property {string} LIGHT_PRESET - Sets the Light Presets (Environments) for the Viewer.\n * @property {string} ENV_MAP_BACKGROUND - Toggles environment map for background.\n * @property {string} FIRST_PERSON_TOOL_POPUP - Toggles first person tool popup.\n * @property {string} BIM_WALK_TOOL_POPUP - Toggles the bimwalk tool popup.\n * @property {string} BIM_WALK_NAVIGATOR_TYPE - Identifier for the bimWalkNavigatorType preference. This is used to set the BimWalk tool navigator.\n * @property {string} BIM_WALK_GRAVITY - Identifier for the bimWalkGravity preference. This is used to toggle the BimWalk tool's gravity.\n * @property {string} DEFAULT_NAVIGATION_TOOL_3D - identifier for the toolToUse preference. This is used to set which navigation tool will be used.\n * @property {string} SELECTION_MODE - identifier for the selectionMode preference. This is used to set which selection mode (Leaf, First, Last object) wil be used by the viewer.\n * @property {string} ENABLE_CUSTOM_ORBIT_TOOL_CURSOR - identifier for whether the OrbitDollyPanTool will customize the cursor visuals.\n * @property {string} EXPLODE_STRATEGY - Specifies which algorithm is used when exploding the model. Supported values are 'hierarchy' (default) and 'radial'. Other values are treated as 'radial'.\n * @property {string} FORCE_DOUBLE_SIDED - Forces the viewer to render materials as double sided. Otherwise it uses the model specified value.\n */\n\n/**\n     * Preference names that can be used to set {@link Autodesk.Viewing.Private.Preferences}\n     * These preference names only apply for 3D models. \n     * @type {Prefs3D}\n     * @alias Autodesk.Viewing.Private.Prefs3D\n     */\nexport var Prefs3D = {\n  VIEW_CUBE: 'viewCube',\n  VIEW_CUBE_COMPASS: 'viewCubeCompass',\n  VIEW_TYPE: 'viewType',\n  ALWAYS_USE_PIVOT: 'alwaysUsePivot',\n  ZOOM_TOWARDS_PIVOT: 'zoomTowardsPivot',\n  SELECTION_SETS_PIVOT: 'selectionSetsPivot',\n  REVERSE_HORIZONTAL_LOOK_DIRECTION: 'reverseHorizontalLookDirection',\n  REVERSE_VERTICAL_LOOK_DIRECTION: 'reverseVerticalLookDirection',\n  ORBIT_PAST_WORLD_POLES: 'orbitPastWorldPoles',\n  CLICK_TO_SET_COI: 'clickToSetCOI',\n  GHOSTING: 'ghosting',\n  OPTIMIZE_NAVIGATION: 'optimizeNavigation',\n  AMBIENT_SHADOWS: 'ambientShadows',\n  ANTIALIASING: 'antialiasing',\n  GROUND_SHADOW: 'groundShadow',\n  GROUND_REFLECTION: 'groundReflection',\n  LINE_RENDERING: 'lineRendering',\n  EDGE_RENDERING: 'edgeRendering',\n  LIGHT_PRESET: 'lightPreset',\n  ENV_MAP_BACKGROUND: 'envMapBackground',\n  FIRST_PERSON_TOOL_POPUP: 'firstPersonToolPopup',\n  BIM_WALK_TOOL_POPUP: 'bimWalkToolPopup',\n  BIM_WALK_NAVIGATOR_TYPE: 'bimWalkNavigatorType',\n  BIM_WALK_GRAVITY: 'bimWalkGravity',\n  DEFAULT_NAVIGATION_TOOL_3D: 'defaultNavigationTool3D',\n  SELECTION_MODE: 'selectionMode',\n  ENABLE_CUSTOM_ORBIT_TOOL_CURSOR: 'enableCustomOrbitToolCursor',\n  EXPLODE_STRATEGY: 'explodeStrategy',\n  FORCE_DOUBLE_SIDED: 'forceDoubleSided' };\n\n\n/**\n                                             * Contains viewer setting preference names for 2D models.\n                                             * @typedef {Object} Prefs2D\n                                             * @property {string} GRAYSCALE - Overrides line colors in 2D models to render in shades of gray.\n                                             * @property {string} SWAP_BLACK_AND_WHITE - Will switch to white lines on a black background.\n                                             * @property {string} FORCE_PDF_CALIBRATION - Force PDF calibration before measuring.\n                                             * @property {string} FORCE_LEAFLET_CALIBRATION - Force Leaflet calibration before measuring.\n                                             */\n\n/**\n                                                 * Preference names that can be used to set {@link Autodesk.Viewing.Private.Preferences}\n                                                 * These preference names only apply for 2D models. \n                                                 * @type {Prefs2D}\n                                                 * @alias Autodesk.Viewing.Private.Prefs2D\n                                                 */\nexport var Prefs2D = {\n  GRAYSCALE: 'grayscale',\n  SWAP_BLACK_AND_WHITE: 'swapBlackAndWhite',\n  LOADING_ANIMATION: 'loadingAnimation',\n  FORCE_PDF_CALIBRATION: 'forcePDFCalibration',\n  FORCE_LEAFLET_CALIBRATION: 'forceLeafletCalibration',\n  DISABLE_PDF_HIGHLIGHT: 'disablePdfHighlight' };\n\n\n/**\n                                                   * Contains viewer setting preference names that are available to both 3D and 2D models.\n                                                   * @typedef {Object} Prefs\n                                                   * @property {string} PROGRESSIVE_RENDERING - Toggles whether progressive rendering is used.\n                                                   * @property {string} OPEN_PROPERTIES_ON_SELECT - Open property panel when selecting an object. (Only for GuiViewer3D)\n                                                   * @property {string} POINT_RENDERING - Hides all points in the scene.\n                                                   * @property {string} BACKGROUND_COLOR_PRESET - Sets a color to the background.\n                                                   * @property {string} REVERSE_MOUSE_ZOOM_DIR - Reverse the default direction for camera dolly (zoom) operations.\n                                                   * @property {string} LEFT_HANDED_MOUSE_SETUP - Reverse mouse buttons from their default assignment (i.e. Left mouse operation becomes right mouse and vice versa).\n                                                   * @property {string} FUSION_ORBIT - Sets the orbit to fusion orbit.\n                                                   * @property {string} FUSION_ORBIT_CONSTRAINED - Sets the the orbit to the contrained fusion orbit.\n                                                   * @property {string} WHEEL_SETS_PIVOT - Sets wheel-zoom action to automatically reset the orbit pivot to the location under the cursor.\n                                                   * @property {string} RESTORE_SESSION_MEASUREMENTS - When opening the measure tool restore any existing measurements that where created during the session.\n                                                   * @property {string} DISPLAY_UNITS - Units for quantities displayed in the property panel\n                                                   * @property {string} DISPLAY_UNITS_PRECISION - Precision for quantities displayed in the property panel\n                                                   * @property {string} KEY_MAP_CMD - CMD key mapping to CTRL key in Mac\n                                                   */\n\n/**\n                                                       * Preference names that can be used to set {@link Autodesk.Viewing.Private.Preferences}\n                                                       * These preference names are shared between both 3D and 2D models. \n                                                       * @type {Prefs}\n                                                       * @alias Autodesk.Viewing.Private.Prefs\n                                                       */\nexport var Prefs = {\n  PROGRESSIVE_RENDERING: 'progressiveRendering',\n  OPEN_PROPERTIES_ON_SELECT: 'openPropertiesOnSelect',\n  POINT_RENDERING: 'pointRendering',\n  BACKGROUND_COLOR_PRESET: 'backgroundColorPreset',\n  REVERSE_MOUSE_ZOOM_DIR: 'reverseMouseZoomDir',\n  LEFT_HANDED_MOUSE_SETUP: 'leftHandedMouseSetup',\n  FUSION_ORBIT: 'fusionOrbit',\n  FUSION_ORBIT_CONSTRAINED: 'fusionOrbitConstrained',\n  WHEEL_SETS_PIVOT: 'wheelSetsPivot',\n  RESTORE_SESSION_MEASUREMENTS: 'restoreMeasurements',\n  DISPLAY_UNITS: 'displayUnits',\n  DISPLAY_UNITS_PRECISION: 'displayUnitsPrecision',\n  KEY_MAP_CMD: 'keyMapCmd' };\n\n\n\n/**\n                               * ViewCube view types.\n                               * @typedef {Object} VIEW_TYPES\n                               * @property {number} DEFAULT - Sets the default view and enables the view preferences.\n                               * @property {number} ORTHOGRAPHIC - Sets the orthographic view and enables the view preferences.\n                               * @property {number} PERSPECTIVE - sets the perspective view and enables the view preferences.\n                               * @property {number} PERSPECTIVE_ORTHO_FACES - sets the perspective with orthographic faces view and enables the view preferences\n                               */\n\n/**\n                                   * View types used for setting the viewType preference.\n                                   * @type {VIEW_TYPES}\n                                   * @alias Autodesk.Viewing.Private.VIEW_TYPES\n                                   */\nexport var VIEW_TYPES = {\n  DEFAULT: 0,\n  ORTHOGRAPHIC: 1,\n  PERSPECTIVE: 2,\n  PERSPECTIVE_ORTHO_FACES: 3 };","function _typeof(obj) {\"@babel/helpers - typeof\";if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {_typeof = function _typeof(obj) {return typeof obj;};} else {_typeof = function _typeof(obj) {return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;};}return _typeof(obj);}\nimport * as et from \"./EventTypes\";\nimport { logger } from \"../logger/Logger\";\nimport { GlobalManagerMixin } from \"../application/GlobalManagerMixin\";\nimport { EnumType } from './ProfileSettings';\n/**\n                                               * Application preferences.\n                                               *\n                                               * Optionally uses web storage.\n                                               *\n                                               * Each preference value can have tags associated to them. Developer supported tags are:\n                                               * - 'ignore-producer'\n                                               * - 'no-storage'\n                                               * - '2d'\n                                               * - '3d'\n                                               *\n                                               * Use tag 'ignore-producer' in extensions to avoid having developer-defined\n                                               * render settings overridden by the loaded file.\n                                               *\n                                               * Use tag 'no-storage' in extensions to avoid having User Preferences (from Settings Panel) override\n                                               * default or developer-defined preferences. Useful for render settings.\n                                               *\n                                               * Preferences may apply to all model types, only 2D models (with tag '2d') or 3D models only (with tag '3d').\n                                               *\n                                               * @constructor\n                                               * @param {Autodesk.Viewing.Viewer3D} viewer - Viewer instance.\n                                               * @param {object} options - Contains configuration parameters used to do initializations.\n                                               * @param {boolean} [options.localStorage] - Whether values get stored and loaded back\n                                               * from localStorage. Defaults to `true`.\n                                               * @param {string} [options.prefix] - A string to prefix preference names in web storage.\n                                               * Defaults to `'Autodesk.Viewing.Preferences.'`.\n                                               * @alias Autodesk.Viewing.Private.Preferences\n                                               */\nexport function Preferences(viewer, options) {\n\n  var self = this;\n  self.setGlobalManager(viewer.globalManager);\n  var _window = self.getWindow();\n\n  // Backwards compatibility for when the 2nd argument was 'prefix' string\n  if (typeof options === 'string') {\n    options = {\n      prefix: options };\n\n  }\n  if (!options) {\n    options = {};\n  }\n\n  if (!options.prefix) {\n    options.prefix = 'Autodesk.Viewing.Preferences.';\n  }\n  if (!options.hasOwnProperty('localStorage')) {\n    options.localStorage = true;\n  }\n\n  // from stackoverflow:\n  // http://stackoverflow.com/questions/14555347/html5-localstorage-error-with-safari-quota-exceeded-err-dom-exception-22-an\n  //\n  function isLocalStorageSupported() {\n    var testKey = options.prefix + 'test';\n    try {\n      var storage = _window.localStorage; // This may assert if browsers disallow sites from setting data.\n      storage.setItem(testKey, '1');\n      storage.removeItem(testKey);\n      return true;\n\n    } catch (error) {\n      return false;\n    }\n  }\n\n  var defaults = {}, // Default values\n  callbacks = {}, // Changed and Reset listeners\n  tags = {},\n  useLocalStorage = options.localStorage && isLocalStorageSupported(),\n  that = this;\n\n  viewer.addEventListener(et.PREF_CHANGED_EVENT, function (event) {\n    var callbacksForName = callbacks[event.name];\n    if (callbacksForName) {\n      callbacksForName.forEach(function (callbackForName) {\n        var callback = callbackForName.changed;\n        if (callback && typeof callback === 'function') {\n          callback(event.value);\n        }\n      });\n    }\n  });\n\n  viewer.addEventListener(et.PREF_RESET_EVENT, function (event) {\n    var callbacksForName = callbacks[event.name];\n    if (callbacksForName) {\n      callbacksForName.forEach(function (callbackForName) {\n        var callback = callbackForName.reset;\n        if (callback && typeof callback === 'function') {\n          callback(event.value);\n        }\n      });\n    }\n  });\n\n  /**\n       * Get/set preference value in web storage.\n       * No-Op if tag 'no-storage' is associated to the name.\n       * @param {string} name - Preference name.\n       * @param {*} [value] - Preference value.\n       * @returns {*} Preference value or undefined if not available.\n       * @private\n       */\n  function webStorage(name, value) {\n    if (useLocalStorage) {\n\n      // Avoid storage for 'no-storage' tags\n      if (that.hasTag(name, 'no-storage')) {\n        return undefined;\n      }\n\n      // Prefix our names, so we don't pollute the localStorage of the embedding application\n      var prefixedName = options.prefix + name;\n\n      if (typeof value !== \"undefined\") {\n        // If value is specified, we set this value in localStorage\n        if (value instanceof EnumType) {\n          value = value.toString();\n        }\n        _window.localStorage[prefixedName] = value;\n\n      } else {\n        // If no value is specified we return the value from localStorage\n        value = _window.localStorage[prefixedName];\n      }\n      return value;\n    }\n    return undefined;\n  }\n\n  /**\n     * Adds a preference name + default value, tries to load value from web storage.\n     * @param {string} name\n     * @param {*} defaultValue\n     * @private\n     */\n  function addPref(name, defaultValue) {\n    if (typeof name !== 'string' || typeof that[name] === 'function') {\n      logger.log('Preferences: invalid name=' + name);\n      return;\n    }\n\n    // Use default if nothing in web storage.\n    //\n    var value = webStorage(name);\n    var ok = false;\n\n    if (value !== undefined) {\n      try {\n        value = JSON.parse(value);\n        if (value.type === '__enum') {\n          value = EnumType.deSerialize(value);\n        }\n        ok = true;\n      } catch (e) {\n      }\n    }\n    that[name] = ok ? value : defaultValue;\n    tags[name] = {};\n  }\n\n  /**\n     * Load preference values from web storage/defaults.\n     * @param {object} defaultValues - Preference names and their default values.\n     */\n  this.load = function (defaultValues) {\n    defaults = defaultValues;\n    for (var name in defaults) {\n      if (defaults.hasOwnProperty(name)) {\n        addPref(name, defaults[name]);\n      }\n    }\n  };\n\n  /**\n      * Add tags for a specific preference name.\n      * @param {string} name - preference name\n      * @param {string[]|string} tags - tags for the preference.\n      * @returns {boolean} - true if the tags were added, false otherwise.\n      */\n  this.addTags = function (name, tags) {\n    if (!tags || !name) return false;\n    tags = !Array.isArray(tags) ? [tags] : tags;\n\n    for (var i = 0; i < tags.length; ++i) {\n      this.tag(tags[i], name);\n    }\n    return true;\n  };\n\n  /**\n      * Adds a tag to the specified preferences.\n      * These are used by reset().\n      * @param {string} tag\n      * @param {string[]|string} [names] - Preference names, default all preferences.\n      */\n  this.tag = function (tag, names) {\n    if (tag) {\n      if (!names) {\n        names = Object.keys(defaults);\n      } else if (!Array.isArray(names)) {\n        names = [names];\n      }\n      for (var i = 0; i < names.length; ++i) {\n        if (tags[names[i]])\n        tags[names[i]][tag] = true;\n      }\n    }\n  };\n\n  /**\n      * Removes a tag from the specified preferences.\n      * These are used by reset().\n      * @param {string} tag\n      * @param {string[]|string} [names] - Preference names, default all preferences.\n      */\n  this.untag = function (tag, names) {\n    if (tag) {\n      if (!names) {\n        names = Object.keys(defaults);\n      } else if (!Array.isArray(names)) {\n        names = [names];\n      }\n      for (var i = 0; i < names.length; ++i) {\n        if (tags[names[i]])\n        tags[names[i]][tag] = false;\n      }\n    }\n  };\n\n  /**\n      * Checks whether a tag is associated to a name\n      * @param {string} name - Preference name\n      * @param {string} tag - The tag to check for\n      */\n  this.hasTag = function (name, tag) {\n    var nameKey = tags[name];\n    if (nameKey) {\n      return nameKey[tag] === true;\n    }\n    return false;\n  };\n\n  /**\n      * Adds a new preference name + default value.\n      * This preference was not previously loaded via load().\n      * @param {string} name - Preference name.\n      * @param {*} defaultValue - Preference default value.\n      * @param {string[]|string} [tags] - Optional tags.\n      * @param {boolean} [override] - Override existing preference if it already exists and fires an event.\n      * @returns {boolean} true if the preference was added.\n      */\n  this.add = function (name, defaultValue, tags, override) {\n    if (defaults.hasOwnProperty(name) && !override) {\n      logger.log(\"Preferences: \" + name + \" already exists\");\n\n    } else {\n      this.setDefault(name, defaultValue);\n      addPref(name, defaultValue);\n\n      this.addTags(name, tags);\n      // dispatch the preference event when overriding the preference.\n      if (override) {\n        viewer.dispatchEvent({\n          type: et.PREF_CHANGED_EVENT,\n          name: name,\n          value: this.get(name) });\n\n      }\n      return true;\n    }\n    return false;\n  };\n\n\n  /**\n      * Update the preference's default value.\n      * @param {string} name - Preference name.\n      * @param {*} defaultValue - Preference default value.\n      */\n  this.setDefault = function (name, defaultValue) {\n    if (defaultValue instanceof EnumType) defaultValue = defaultValue.value;\n    if (!name || isNaN(defaultValue)) return;\n    defaults[name] = defaultValue;\n  };\n\n  /**\n      * Removes an existing preference.\n      * @param {string} name - Preference name.\n      * @param {boolean} [removeFromWebStorage=false] - True to clear the web storage entry for this preference.\n      * @returns {boolean} True if the preference was removed.\n      */\n  this.remove = function (name, removeFromWebStorage) {\n    if (defaults.hasOwnProperty(name)) {\n      delete defaults[name];\n      delete tags[name];\n      delete this[name];\n\n      if (removeFromWebStorage) {\n        deleteFromWebStorage(name);\n      }\n\n      return true;\n    }\n    return false;\n  };\n\n  function deleteFromWebStorage(name) {\n    if (useLocalStorage) {\n      name = options.prefix + name;\n      delete localStorage[name];\n    }\n  }\n\n  /**\n     * Removes preferences from the browser's localStorage that are associated with the options prefix.\n     */\n  this.clearWebStorage = function () {\n    if (useLocalStorage) {\n      var storage = _window.localStorage;\n      for (var key in storage) {\n        if (storage.hasOwnProperty(key) && key.indexOf(options.prefix) !== -1) {\n          delete localStorage[key];\n        }\n      }\n    }\n  };\n\n  /**\n      * Reset preferences to default values.\n      * If a tag is specified, then only certain preferences are reset.\n      * @param {string} [tag] Optional tag.\n      * @param {boolean} [include=true] True to reset only preferences with matching tags.\n      */\n  this.reset = function (tag, include) {\n    if (tag && include === undefined) {\n      include = true;\n    }\n\n    for (var name in defaults) {\n      if (defaults.hasOwnProperty(name)) {\n        if (tag) {\n          var tagged = !!tags[name][tag];\n          if (include && !tagged || !include && tagged) {\n            continue;\n          }\n        }\n\n        if (this.set(name, defaults[name], false)) {\n          viewer.dispatchEvent({\n            type: et.PREF_RESET_EVENT,\n            name: name,\n            value: this.get(name) });\n\n        }\n\n        deleteFromWebStorage(name);\n      }\n    }\n  };\n\n  /**\n      * Get named preference value.\n      * Shortcut: prefs[name]\n      * @returns {*} Preference value.\n      */\n  this.get = function (name) {\n    return this[name] instanceof EnumType ? this[name].value : this[name];\n  };\n\n  /**\n      * Set named preference value.\n      * Value is not persisted if tag 'no-storage' is set.\n      * Do not use shortcut prefs[name] = value.\n      * @param {string} name - Preference name.\n      * @param {*} value - Preference value.\n      * @param {boolean} [notify=true] - If true then PREF_CHANGED_EVENT is fired.\n      * @returns {boolean} True if the value changed, false otherwise.\n      */\n  this.set = function (name, value, notify) {\n    value = value instanceof EnumType ? value.value : value;\n    function isEqual(val1, val2) {\n      var getVal = function getVal(v) {\n        return _typeof(v) === 'object' ? JSON.stringify(v) : v;\n      };\n      return getVal(val1) === getVal(val2);\n    }\n    // Updates the cached value as well as the value in the web storage\n    if (!isEqual(this.get(name), value)) {\n      if (this[name] instanceof EnumType) {\n        this[name].value = value;\n      } else {\n        this[name] = value;\n      }\n      webStorage(name, value);\n\n      if (notify === undefined || notify) {\n        viewer.dispatchEvent({\n          type: et.PREF_CHANGED_EVENT,\n          name: name,\n          value: value });\n\n      }\n\n      return true;\n    }\n    return false;\n  };\n\n  /**\n      * Dispatches an event for the specific preference.\n      */\n  this.dispatchEvent = function (name) {\n    var value = this.get(name);\n    var type = et.PREF_CHANGED_EVENT;\n    viewer.dispatchEvent({ type: type, name: name, value: value });\n  };\n\n  /**\n      * Listen for preference changed and reset events.\n      * @param {string} name - Preferences name.\n      * @param {function} onChangedCallback - Function called when preferences are changed.\n      * @param {function} onResetCallback - Function called when preferences are reset.\n      */\n  this.addListeners = function (name, onChangedCallback, onResetCallback) {\n    if (!callbacks[name])\n    callbacks[name] = [];\n\n    // Reuse the onChangedCallback if the resetCallback is not passed.\n    if (!onResetCallback) onResetCallback = onChangedCallback;\n    callbacks[name].push({ changed: onChangedCallback, reset: onResetCallback });\n  };\n\n  /**\n      * Remove listeners for preference changed and reset events.\n      * All of the registered callbacks are removed if the onChangedCallback and the onResetCallback are not passed in.\n      * @param {string} name - Preferences name.\n      * @param {function} [onChangedCallback] - callback for preference changes.\n      * @param {function} [onResetCallback] - callback for preference reset.\n      */\n  this.removeListeners = function (name, onChangedCallback, onResetCallback) {\n    if (callbacks[name] === undefined) return;\n\n    // This is the old functionality. If the onChangedCallback and the onResetCallback are not passed in delete all of the callbacks.\n    // TODO: Remove this for the next breaking change (v8.0.0).\n    if (!onChangedCallback && !onResetCallback) {\n      delete callbacks[name];\n      return;\n    }\n\n    if (!onResetCallback) {\n      onResetCallback = onChangedCallback;\n    }\n\n    for (var i = 0; i < callbacks[name].length; ++i) {\n      if (callbacks[name][i].changed === onChangedCallback && callbacks[name][i].reset === onResetCallback) {\n        callbacks[name].splice(i, 1);\n        break;\n      }\n    }\n  };\n\n  /**\n      * Clears all preference listeners that are added by {@link Autodesk.Viewing.Private.Preferences#addListeners}.\n      */\n  this.clearListeners = function () {\n    callbacks = {};\n  };\n\n  /**\n      * Whether values are stored into browser's localStorage or read back from it.\n      * @param {boolean} useIt - true to use browser's `localStorage`\n      */\n  this.setUseLocalStorage = function (useIt) {\n    useLocalStorage = !!useIt;\n  };\n};\n\nGlobalManagerMixin.call(Preferences.prototype);","import { Prefs3D, Prefs2D } from './PreferenceNames';\nimport { LocalStorage } from './LocalStorage';\nimport { getGlobal } from '../compat';\n\nvar _window = getGlobal();\n\n/**\n                            * Clears the local storage if a new profile is loaded that is not already in the browser's local storage.\n                            * Example:\n                            * 1. The AEC profile is loaded and some preferences are stored in local storage.\n                            * 2. The Default profile is loaded, the preferences from the AEC profile will be removed from the local storage.\n                            * @param {string} name - profile name\n                            * @param {Autodesk.Viewing.Preferences} prefs - viewer preferences\n                            * @private\n                            */\nfunction setLocalStorage(name, prefs) {\n  if (LocalStorage.isSupported()) {\n    var profileStorageId = \"Autodesk.Viewing.ProfileName\";\n    var profileName = _window.localStorage.getItem(profileStorageId);\n    if (profileName !== name) {\n      LocalStorage.setItem(profileStorageId, name);\n      // Remove all of the preferences stored in Local storage.\n      prefs.clearWebStorage();\n    }\n  }\n}\n\n/**\n   * Profiles encapsulate viewer settings, extensions to unload, and extensions to load.\n   * \n   * The `profileSettings.settings` parameter will override the existing  {@link Autodesk.Viewing.Private.Preferences|preferences} upon calling the {@link Autodesk.Viewing.Profile#apply|apply} method.\n   * The `profileSettings.extensions.load` and `profileSettings.extensions.unload` arrays are used to load and unload extensions.\n   * Make sure to set the profile by using the {@link Autodesk.Viewing.Viewer3D#setProfile} method.\n   * \n   * @example\n   * const profileSettings = {\n   *    name: \"mySettings\",\n   *    description: \"My personal settings.\",\n   *    settings: {\n   *        ambientShadows: false,\n   *        groundShadows: true\n   *    }\n   *    persistent: ['ambientShadows'],\n   *    extensions: {\n   *        load: [\"Autodesk.BimWalk\"],   // Extensions to load\n   *        unload: [\"Autodesk.ViewCubeUi\"]  // Extensions to unload and to not load\n   *    }\n   * };\n   * const profile = new Autodesk.Viewing.Profile(profileSettings);\n   * @constructor\n  \n   * @param {ProfileSettings} profileSettings - the profile settings. \n   * @alias Autodesk.Viewing.Profile\n   */\nexport function Profile(profileSettings) {\n  if (!profileSettings) return;\n  var av = Autodesk.Viewing;\n  var parentProfileSettings = av.ProfileSettings.Default;\n  var prefsToOverride = [];\n\n  // Use \"Custom\" as the profile name if a name is not passed in with the settings object\n  this.name = profileSettings.hasOwnProperty('name') ? profileSettings.name : 'Custom';\n  this.label = profileSettings.label;\n  this.description = profileSettings.description;\n\n  // Check which preferences we want to store.\n  this.persistent = Array.isArray(profileSettings.persistent) ?\n  profileSettings.persistent :\n  parentProfileSettings.persistent;\n\n  // Assign the default profile\n  this.settings = Object.assign({}, parentProfileSettings.settings);\n\n  if (profileSettings.hasOwnProperty('settings')) {\n    var settings = profileSettings.settings;\n    prefsToOverride = Object.keys(settings);\n    // merge the passed in profile with the default profile\n    this.settings = Object.assign(this.settings, settings);\n  }\n\n  var extsToLoad = [];\n  var extsToUnload = [];\n\n  // Get the extensions that need to be loaded and unloaded\n  if (profileSettings.hasOwnProperty('extensions')) {\n    var toLoad = profileSettings.extensions.load;\n    var toUnload = profileSettings.extensions.unload;\n    extsToLoad = toLoad ? toLoad.slice() : extsToLoad;\n    extsToUnload = toUnload ? toUnload.slice() : extsToUnload;\n  }\n\n  this.extensions = {\n    load: extsToLoad,\n    unload: extsToUnload };\n\n\n  /**\n                             * Applies the profile's settings to the viewer preferences.\n                             * To make the viewer react to the updated preferences please reference {@link Autodesk.Viewing.Viewer3D#setProfile}.\n                             * @param {Autodesk.Viewing.Private.Preferences} prefs - preferences instance.\n                             * @param {boolean} [override=true] - Override all existing preferences with the profile's preferences. \n                             * @alias Autodesk.Viewing.Profile#apply\n                             */\n  this.apply = function (prefs) {var override = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : true;\n    if (!prefs) return false;\n\n    // Clear the preferences from local storage if the profile changed.\n    setLocalStorage(this.name, prefs);\n    var settings = this.settings;\n    var viewerDefined = [av.ProfileSettings.Default.name, av.ProfileSettings.AEC.name];\n    var prefs3d = Object.values(Prefs3D);\n    var prefs2d = Object.values(Prefs2D);\n    for (var name in settings) {\n      if (settings.hasOwnProperty(name)) {\n        var value = settings[name];\n        // Ignore metadata if the profile is a custom one (not the ProfileSettings.AEC or the DefaultProfile Settings.)\n        var tags =\n        prefsToOverride.indexOf(name) !== -1 && viewerDefined.indexOf(this.name) === -1 ?\n        ['ignore-producer'] :\n        [];\n        if (prefs3d.indexOf(name) !== -1) {\n          tags.push('3d');\n        } else if (prefs2d.indexOf(name) !== -1) {\n          tags.push('2d');\n        } else {\n          tags.push('2d');\n          tags.push('3d');\n        }\n\n        // If the preference is not in the persistent array then add the no-storage tag.\n        if (this.persistent.indexOf(name) === -1) {\n          tags.push('no-storage');\n        }\n\n        var prefValue = prefs.get(name);\n        if (prefValue !== undefined) {\n          // Add tags to the preference even if the value did not change\n          prefs.addTags(name, tags);\n          // LMV-5591: override the set preferences with the profile's preferences.\n          // Fire an event if the preference value is being changed by the profile\n          if (prefValue !== value && override) {\n            prefs.set(name, value);\n          }\n        } else {\n          // Add the preference and fire the event.\n          prefs.add(name, value, tags, true);\n        }\n      }\n    }\n\n    return true;\n  };\n}","function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}import { logger } from '../logger/Logger';\nimport { Profile } from './Profile';\n\n/**\n                                      * The ProfileManager provides a mechanism for registering {@link ProfileSettings|profile settings} with a specific file type.\n                                      * Any of the registered profiles can be set by using {@link Autodesk.Viewing.Viewer3D#setProfile|viewer.setProfile()}.\n                                      * \n                                      * @example\n                                      *   const profileManager = new Autodesk.Viewing.ProfileManager();\n                                      *   // or\n                                      *   // const profileManger = viewer.profileManager;\n                                      *   const profileSettings = {\n                                      *      name: \"DWF\",\n                                      *      settings: {\n                                      *          swapBlackAndWhite: true\n                                      *      },\n                                      *      // ...\n                                      *   }\n                                      *   // Registers the specified profile settings for dwf models.\n                                      *   profileManager.registerProfile('dwf', profileSettings);\n                                      *   const profile = profileManager.getProfile('dwf'); // others: 'default', 'nwc', 'nwd', 'rvt', 'ifc'\n                                      *   viewer.setProfile(profile);\n                                      * @constructor\n                                      * \n                                      * @alias Autodesk.Viewing.ProfileManager\n                                      */\nexport var ProfileManager = /*#__PURE__*/function () {\n  function ProfileManager() {_classCallCheck(this, ProfileManager);\n    this.registered = {};\n    // Register known profileSettings.\n    var knownProfileSettings = Autodesk.Viewing.ProfileSettings;\n\n    // The default profile will be used for everything else.\n    this.PROFILE_DEFAULT = new Profile(knownProfileSettings.Default);\n    this.registerProfile('default', this.PROFILE_DEFAULT);\n\n    // The AEC profile will be used for rvt and ifc file types.\n    this.PROFILE_AEC = new Profile(knownProfileSettings.AEC);\n    this.registerProfile('rvt', this.PROFILE_AEC);\n    this.registerProfile('ifc', this.PROFILE_AEC);\n\n    // The Navis profile will be used for nwc and nwd file types.\n    this.PROFILE_NAVIS = new Profile(knownProfileSettings.Navis);\n    this.registerProfile('nwc', this.PROFILE_NAVIS);\n    this.registerProfile('nwd', this.PROFILE_NAVIS);\n\n    // Design Collaboration profile. The extension doesn't matter here.\n    this.PROFILE_FLUENT = new Profile(knownProfileSettings.Fluent);\n    this.registerProfile('fluent', this.PROFILE_FLUENT);\n  }\n\n  /**\n     * Registers a profile. The profile will be overridden if a profile was already registered with the ProfileManager.\n     * @param {String} fileExt - file extension to register the profile settings with.\n     * @param {ProfileSettings|Autodesk.Viewing.Profile} profileSettings - profile settings object or profile instance to register\n     * @alias Autodesk.Viewing.ProfileManager#registerProfile\n     */_createClass(ProfileManager, [{ key: \"registerProfile\", value: function registerProfile(\n    fileExt, profileSettings) {\n      if (!profileSettings) {\n        logger.log('ProfileManager: missing profileSettings when registering a profile.');\n        return;\n      }\n      fileExt = fileExt || 'default';\n      this.registered[fileExt] = profileSettings instanceof Profile ? profileSettings : new Profile(profileSettings);\n    }\n\n    /**\n       * Unregister the profile associated with a file type\n       * @param {String} fileExt - file type\n       * @alias Autodesk.Viewing.ProfileManager#unregisterProfile\n       */ }, { key: \"unregisterProfile\", value: function unregisterProfile(\n    fileExt) {\n      if (!fileExt) {\n        logger.log('ProfileManager: missing fileExt when unregistering a profile.');\n        return;\n      }\n      delete this.registered[fileExt];\n    }\n\n    /**\n       * Returns the registered profiles object.\n       * @returns {Object} - registered profiles to specific fily types\n       */ }, { key: \"getProfiles\", value: function getProfiles()\n    {\n      return Object.assign({}, this.registered);\n    }\n\n    /**\n       * Returns a profile that is registered with the specific file type. If the file type is not registered, then the default profile is returned.\n       * @param {String} fileExt - file extension\n       * @returns {Autodesk.Viewing.Profile} - Profile associated with the file extension.\n       * @alias Autodesk.Viewing.ProfileManager#getProfileOrDefault\n       */ }, { key: \"getProfileOrDefault\", value: function getProfileOrDefault(\n    fileExt) {\n      if (!fileExt) {\n        logger.log('ProfileManager: missing fileExt for getProfile. Returning the default Profile.');\n        return this.registered.default;\n      }\n\n      var registeredProfile = this.registered[fileExt];\n\n      if (!registeredProfile) {\n        logger.log(\"ProfileManager: No profile registered for \".concat(fileExt, \". Returning the default Profile.\"));\n        return this.registered.default;\n      } else {\n        return registeredProfile;\n      }\n    } }]);return ProfileManager;}();","function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}import { Prefs, Prefs2D, Prefs3D, VIEW_TYPES } from './PreferenceNames';\nimport { logger } from \"../logger/Logger\";\n\nimport { SelectionMode } from '../wgs/scene/SelectionMode';\nimport { isMobileDevice, getGlobal } from '../compat';\nimport { DefaultLightPreset } from './LightPresets';\n\nimport { displayUnitsEnum, displayUnitsPrecisionEnum } from '../measurement/DisplayUnits';\n\n// For enum type values\nexport var EnumType = /*#__PURE__*/function () {\n  function EnumType(values, current) {_classCallCheck(this, EnumType);\n    if (!Array.isArray(values) || values.length === 0) {\n      throw new Error(\"Invalid \".concat(values));\n    }\n\n    this.values = new Set(values);\n    this.current = current in values ? current : values[0];\n  }_createClass(EnumType, [{ key: \"toString\",\n\n\n\n\n\n\n\n\n\n\n\n    // for serializing\n    value: function toString() {\n      return JSON.stringify({\n        type: '__enum',\n        values: Array.from(this.values),\n        current: this.current });\n\n    } }, { key: \"value\", get: function get() {return this.current;}, set: function set(newValue) {if (this.values.has(newValue)) {this.current = newValue;}} }], [{ key: \"deSerialize\", value: function deSerialize(\n\n    obj) {\n      if (obj.type !== '__enum') {\n        return;\n      }\n\n      return new EnumType(obj.values, obj.current);\n    } }]);return EnumType;}();\n\n\n/**\n                                * Object used to apply the preferences by a Profile \n                                * @typedef {Object} Settings\n                                * @property {boolean} viewCube - Sets the visibility of the viewcube.\n                                * @property {boolean} viewCubeCompass - Sets the visibility of the viewcube compass. The compass will only be displayed if model contains orientation data.\n                                * @property {number} viewType - Sets the view to default (0), orthographic (1), perspective (2) or perspective with ortho faces (3).\n                                * @property {boolean} alwaysUsePivot - Orbit controls always orbit around the currently set pivot point.\n                                * @property {boolean} zoomTowardsPivot - default direction for camera dolly (zoom) operations to be towards the camera pivot point.\n                                * @property {boolean} reverseHorizontalLookDirection - Sets a view navigation option to reverse the default direction for horizontal look operations.\n                                * @property {boolean} reverseVerticalLookDirection - Sets a view navigation option to reverse the default direction for vertical look operations.\n                                * @property {boolean} orbitPastWorldPoles - Set a view navigation option to allow the orbit controls to move the camera beyond the north and south poles (world up/down direction).\n                                * @property {boolean} clickToSetCOI - Modify the default click behavior for the viewer.\n                                * @property {boolean} ghosting - Toggles ghosting during search and isolate.\n                                * @property {boolean} optimizeNavigation - Toggles whether the navigation should be optimized for performance.\n                                * @property {boolean} ambientShadows - Enables or disables ambient shadows.\n                                * @property {boolean} antialiasing - Enables or disables antialiasing.\n                                * @property {boolean} groundShadow - Toggles ground shadow.\n                                * @property {boolean} groundReflection - Toggles ground reflection.\n                                * @property {boolean} lineRendering - Hides all lines in the scene.\n                                * @property {boolean} edgeRendering - Turns edge topology display on/off (where available).\n                                * @property {number|string} lightPreset - Sets the Light Presets (Environments) for the Viewer.\n                                * @property {boolean} envMapBackground - Toggles environment map for background.\n                                * @property {boolean} firstPersonToolPopup - Toggles first person tool popup.\n                                * @property {boolean} bimWalkToolPopup - Toggles the bimwalk tool popup.\n                                * @property {boolean} grayscale - Overrides line colors in 2D models to render in shades of gray.\n                                * @property {boolean} swapBlackAndWhite - Will switch to white lines on a black background.\n                                * @property {boolean} progressiveRendering - Toggles whether progressive rendering is used.\n                                * @property {boolean} openPropertiesOnSelect - Open property panel when selecting an object (Only for GuiViewer3D).\n                                * @property {boolean} pointRendering - Hides all points in the scene.\n                                * @property {*} backgroundColorPreset - Sets a color to the background.\n                                * @property {boolean} reverseMouseZoomDir - Reverse the default direction for camera dolly (zoom) operations.\n                                * @property {boolean} leftHandedMouseSetup - Reverse mouse buttons from their default assignment (i.e. Left mouse operation becomes right mouse and vice versa).\n                                * @property {boolean} fusionOrbit - Sets the orbit to fusion orbit.\n                                * @property {boolean} fusionOrbitConstrained - Sets the the orbit to the contrained fusion orbit.\n                                * @property {boolean} wheelSetsPivot - Sets wheel-zoom action to automatically reset the orbit pivot to the location under the cursor.\n                                * @property {boolean} selectionSetsPivot - Sets selection / un-selection action to automatically reset the orbit pivot to be the center of the multiple selection.\n                                * @property {string} bimWalkNavigatorType - Sets the BimWalk tool navigator.\n                                * @property {boolean} bimWalkGravity - Toggles the BimWalk tool's gravity.\n                                * @property {string} defaultNavigationTool3D - Sets which navigation tool will be used by the viewer. (ie: 'extractor_defined' || 'bimwalk')\n                                * @property {string} explodeStrategy - Sets which algorithm is used when exploding a model. Supported values are 'hierarchy' (default) and 'radial'. Other values are treated as 'radial'.\n                                * @property {boolean} loadingAnimation - Toggles loading animation for 2D Models.\n                                * @property {boolean} forcePDFCalibration - Force PDF calibration before measuring.\n                                * @property {boolean} forceLeafletCalibration - Force Leaflet calibration before measuring.\n                                * @property {boolean} restoreMeasurements - When opening the measure tool restore any existing measurements that where created during the session.\n                                * @property {boolean} forceDoubleSided - Force the render to use double sided materials.\n                                * @property {boolean} keyMapCmd - Force mapping CMD key to Ctrl in Mac.\n                                */\n\nvar defaultSettings = {};\ndefaultSettings[Prefs3D.AMBIENT_SHADOWS] = true;\ndefaultSettings[Prefs3D.ANTIALIASING] = !isMobileDevice();\ndefaultSettings[Prefs3D.GROUND_SHADOW] = true;\ndefaultSettings[Prefs3D.GROUND_REFLECTION] = false;\ndefaultSettings[Prefs3D.GHOSTING] = true;\ndefaultSettings[Prefs3D.VIEW_CUBE] = !isMobileDevice();\ndefaultSettings[Prefs3D.VIEW_CUBE_COMPASS] = false;\ndefaultSettings[Prefs3D.VIEW_TYPE] = VIEW_TYPES.DEFAULT;\ndefaultSettings[Prefs3D.LINE_RENDERING] = true;\ndefaultSettings[Prefs3D.LIGHT_PRESET] = DefaultLightPreset;\ndefaultSettings[Prefs3D.EDGE_RENDERING] = false;\ndefaultSettings[Prefs3D.REVERSE_HORIZONTAL_LOOK_DIRECTION] = false;\ndefaultSettings[Prefs3D.REVERSE_VERTICAL_LOOK_DIRECTION] = false;\ndefaultSettings[Prefs3D.ALWAYS_USE_PIVOT] = false;\ndefaultSettings[Prefs3D.ZOOM_TOWARDS_PIVOT] = false;\ndefaultSettings[Prefs3D.ORBIT_PAST_WORLD_POLES] = true;\ndefaultSettings[Prefs3D.CLICK_TO_SET_COI] = false;\ndefaultSettings[Prefs3D.OPTIMIZE_NAVIGATION] = isMobileDevice();\ndefaultSettings[Prefs3D.ENV_MAP_BACKGROUND] = false;\ndefaultSettings[Prefs3D.FIRST_PERSON_TOOL_POPUP] = true;\ndefaultSettings[Prefs3D.BIM_WALK_TOOL_POPUP] = true;\ndefaultSettings[Prefs3D.BIM_WALK_NAVIGATOR_TYPE] = 'default';\ndefaultSettings[Prefs3D.BIM_WALK_GRAVITY] = true;\ndefaultSettings[Prefs3D.DEFAULT_NAVIGATION_TOOL_3D] = 'default';\ndefaultSettings[Prefs3D.SELECTION_MODE] = SelectionMode.LEAF_OBJECT;\ndefaultSettings[Prefs3D.ENABLE_CUSTOM_ORBIT_TOOL_CURSOR] = true;\ndefaultSettings[Prefs3D.EXPLODE_STRATEGY] = 'hierarchy';\ndefaultSettings[Prefs3D.SELECTION_SETS_PIVOT] = false;\ndefaultSettings[Prefs3D.FORCE_DOUBLE_SIDED] = false;\n\n// Settings for 2D\ndefaultSettings[Prefs2D.GRAYSCALE] = false;\ndefaultSettings[Prefs2D.SWAP_BLACK_AND_WHITE] = false;\ndefaultSettings[Prefs2D.LOADING_ANIMATION] = true;\ndefaultSettings[Prefs2D.FORCE_PDF_CALIBRATION] = false;\ndefaultSettings[Prefs2D.FORCE_LEAFLET_CALIBRATION] = true;\ndefaultSettings[Prefs2D.DISABLE_PDF_HIGHLIGHT] = false;\n\n// Settings that are shared between 2D and 3D\ndefaultSettings[Prefs.PROGRESSIVE_RENDERING] = true;\ndefaultSettings[Prefs.OPEN_PROPERTIES_ON_SELECT] = false;\ndefaultSettings[Prefs.POINT_RENDERING] = true;\ndefaultSettings[Prefs.BACKGROUND_COLOR_PRESET] = null;\ndefaultSettings[Prefs.REVERSE_MOUSE_ZOOM_DIR] = false;\ndefaultSettings[Prefs.LEFT_HANDED_MOUSE_SETUP] = false;\ndefaultSettings[Prefs.FUSION_ORBIT] = true;\ndefaultSettings[Prefs.FUSION_ORBIT_CONSTRAINED] = true;\ndefaultSettings[Prefs.WHEEL_SETS_PIVOT] = false;\ndefaultSettings[Prefs.RESTORE_SESSION_MEASUREMENTS] = true;\ndefaultSettings[Prefs.DISPLAY_UNITS] = new EnumType(displayUnitsEnum);\ndefaultSettings[Prefs.DISPLAY_UNITS_PRECISION] = new EnumType(displayUnitsPrecisionEnum);\ndefaultSettings[Prefs.KEY_MAP_CMD] = true;\n\n/**\n                                            * Default settings of the viewer. \n                                            * For more information about each setting, please reference the {@link Settings}.\n                                            * @typedef {Settings} DefaultSettings\n                                            * @property {boolean} viewCube - Default Value: true. Sets the visibility of the viewcube. Set to false for mobile devices.\n                                            * @property {boolean} alwaysUsePivot - Default Value: false. Orbit controls always orbit around the currently set pivot point.\n                                            * @property {boolean} zoomTowardsPivot - Default Value: false. default direction for camera dolly (zoom) operations to be towards the camera pivot point.\n                                            * @property {boolean} reverseHorizontalLookDirection - Default Value: false. Sets a view navigation option to reverse the default direction for horizontal look operations.\n                                            * @property {boolean} reverseVerticalLookDirection - Default Value: false. Sets a view navigation option to reverse the default direction for vertical look operations.\n                                            * @property {boolean} orbitPastWorldPoles - Default Value: true. Set a view navigation option to allow the orbit controls to move the camera beyond the north and south poles (world up/down direction).\n                                            * @property {boolean} clickToSetCOI - Default Value: false. Modify the default click behavior for the viewer.\n                                            * @property {boolean} ghosting - Default Value: true. Toggles ghosting during search and isolate.\n                                            * @property {boolean} optimizeNavigation - Default Value: false. Toggles whether the navigation should be optimized for performance. Set to true for mobile devices.\n                                            * @property {boolean} ambientShadows - Default Value: true. Enables or disables ambient shadows.\n                                            * @property {boolean} antialiasing - Default Value: true. Enables or disables antialiasing. Set to false for mobile devices.\n                                            * @property {boolean} groundShadow - Default Value: true. Toggles ground shadow.\n                                            * @property {boolean} groundReflection - Default Value: false. Toggles ground reflection.\n                                            * @property {boolean} lineRendering - Default Value: true. Hides all lines in the scene.\n                                            * @property {boolean} edgeRendering - Default Value: false. Turns edge topology display on/off (where available).\n                                            * @property {number} lightPreset - Default Value: 1. Sets the Light Presets (Environments) for the Viewer.\n                                            * @property {boolean} envMapBackground - Default Value: false. Toggles environment map for background.\n                                            * @property {boolean} firstPersonToolPopup - Default Value: true. Toggles first person tool popup.\n                                            * @property {boolean} bimWalkToolPopup - Default Value: true. Toggles the bimwalk tool popup.\n                                            * @property {boolean} grayscale - Default Value: false. Overrides line colors in 2D models to render in shades of gray.\n                                            * @property {boolean} swapBlackAndWhite - Default Value: false. Will switch to white lines on a black background for 2D models.\n                                            * @property {boolean} progressiveRendering - Default Value: true. Toggles whether progressive rendering is used.\n                                            * @property {boolean} openPropertiesOnSelect - Default Value: false. Open property panel when selecting an object (Only for GuiViewer3D).\n                                            * @property {boolean} pointRendering - Default Value: true. Hides all points in the scene.\n                                            * @property {*} backgroundColorPreset - Default Value: null. Sets a color to the background.\n                                            * @property {boolean} reverseMouseZoomDir - Default Value: false. Reverse the default direction for camera dolly (zoom) operations.\n                                            * @property {boolean} leftHandedMouseSetup - Default Value: false. Reverse mouse buttons from their default assignment (i.e. Left mouse operation becomes right mouse and vice versa).\n                                            * @property {boolean} fusionOrbit - Default Value: true. Sets the orbit to fusion orbit.\n                                            * @property {boolean} fusionOrbitConstrained - Default Value: true. Sets the the orbit to the contrained fusion orbit.\n                                            * @property {boolean} wheelSetsPivot - Default Value: false. Sets wheel-zoom action to automatically reset the orbit pivot to the location under the cursor.\n                                            * @property {boolean} selectionSetsPivot - Default Value: false. Sets selection / un-selection action to automatically reset the orbit pivot to be the center of the multiple selection.\n                                            * @property {string} bimWalkNavigatorType - Default Value: 'default'. Sets the BimWalk tool navigator.\n                                            * @property {string} defaultNavigationTool3D - Default Value: 'default'. Sets which navigation tool will be used by the viewer. (ie: 'extractor_defined' || 'bimwalk')\n                                            * @property {boolean} loadingAnimation - Default Value: true. Toggles loading animation for 2D Models.\n                                            * @constant\n                                            * @type {ProfileSettings}\n                                            * @memberof Autodesk.Viewing\n                                            * @default\n                                            */\nexport var DefaultSettings = defaultSettings;\n\n// Contains Profile Settings that can be used to initialize Profiles.\n\n/**\n * Contains information about which extension should or should not be loaded.\n * @typedef {Object} Extensions\n * @property {string[]} load - An array of extension ids that should be loaded.\n * @property {string[]} unload - An array of extension ids that should not be loaded.\n */\n\n/**\n     * Object used for setting a viewer profile.\n     * @typedef {Object} ProfileSettings\n     * @property {string} name - Name of the profile settings.\n     * @property {string} [label] - Optional. An end-user string to use instead of the name.\n     * @property {string} [description] - Optional. A description about the profile.\n     * @property {Settings} settings - Used by the Profile to apply to the viewer preferences.\n     * @property {String[]} persistent - An array of setting ids to keep in localStorage.\n     * @property {Extensions} extensions - Extensions that should or should not be loaded.\n     */\n\nvar defaults = {};\n\n// Settings for 3D\ndefaults.name = 'Default';\ndefaults.label = 'Manufacturing (Default)';\ndefaults.description = 'Default Viewer settings.';\n\ndefaults.settings = defaultSettings;\n\n// Stores the preference (settings) values in localStorage  \ndefaults.persistent = [\n// 3D\nPrefs3D.ALWAYS_USE_PIVOT,\nPrefs3D.ZOOM_TOWARDS_PIVOT,\nPrefs3D.REVERSE_HORIZONTAL_LOOK_DIRECTION,\nPrefs3D.REVERSE_VERTICAL_LOOK_DIRECTION,\nPrefs3D.ORBIT_PAST_WORLD_POLES,\nPrefs3D.CLICK_TO_SET_COI,\nPrefs3D.GHOSTING,\nPrefs3D.OPTIMIZE_NAVIGATION,\nPrefs3D.AMBIENT_SHADOWS,\nPrefs3D.ANTIALIASING,\nPrefs3D.GROUND_SHADOW,\nPrefs3D.GROUND_REFLECTION,\nPrefs3D.FIRST_PERSON_TOOL_POPUP,\nPrefs3D.BIM_WALK_TOOL_POPUP,\nPrefs3D.BIM_WALK_GRAVITY,\nPrefs3D.VIEW_TYPE,\n// 2D\nPrefs2D.SWAP_BLACK_AND_WHITE,\nPrefs2D.LOADING_ANIMATION,\n// 3D and 2D\nPrefs.OPEN_PROPERTIES_ON_SELECT,\nPrefs.REVERSE_MOUSE_ZOOM_DIR,\nPrefs.LEFT_HANDED_MOUSE_SETUP,\nPrefs.WHEEL_SETS_PIVOT,\nPrefs.KEY_MAP_CMD];\n\n\ndefaults.extensions = {\n  load: [],\n  unload: [] };\n\n\n/******************* AEC Profile Settings *******************/\n\nvar aec = clone(defaults);\naec.name = 'AEC';\naec.label = 'Construction (AEC)';\naec.description = 'A common set of preferences designed for the Construction industry.';\naec.settings[Prefs.REVERSE_MOUSE_ZOOM_DIR] = true;\naec.settings[Prefs3D.EDGE_RENDERING] = !isMobileDevice();\naec.settings[Prefs3D.LIGHT_PRESET] = getGlobal().DefaultLightPresetAec || \"Boardwalk\";\naec.settings[Prefs3D.ENV_MAP_BACKGROUND] = true;\naec.settings[Prefs3D.VIEW_CUBE_COMPASS] = true;\naec.settings[Prefs3D.SELECTION_SETS_PIVOT] = true;\naec.extensions = {\n  load: [],\n  unload: [] };\n\n\n\n/******************* Fluent Profile Settings *******************/\n\nvar fluent = clone(aec);\nfluent.name = 'Fluent';\nfluent.label = 'Design Collaboration'; // this one gets displayed and localized.\nfluent.description = 'User experience that matches Design Collaboration.';\nfluent.settings[Prefs.WHEEL_SETS_PIVOT] = true;\nfluent.settings[Prefs.RESTORE_SESSION_MEASUREMENTS] = false;\nfluent.settings[Prefs2D.FORCE_PDF_CALIBRATION] = true;\nfluent.settings[Prefs3D.ALWAYS_USE_PIVOT] = true;\nfluent.settings[Prefs3D.ENABLE_CUSTOM_ORBIT_TOOL_CURSOR] = false;\nfluent.extensions = {\n  load: [],\n  unload: [] };\n\n\nfluent.persistent.splice(fluent.persistent.indexOf(Prefs3D.VIEW_TYPE), 1);\n\n\n/******************* Navis Profile Settings *******************/\n\n// Cloned from the AEC Profile Settings\nvar navis = clone(aec);\nnavis.name = 'Navis';\nnavis.label = 'Navisworks';\nnavis.description = 'Provides a user experience similar to Autodesk Navisworks desktop application.';\nnavis.settings[Prefs3D.BIM_WALK_TOOL_POPUP] = false;\nnavis.settings[Prefs3D.BIM_WALK_NAVIGATOR_TYPE] = 'aec';\nnavis.settings[Prefs3D.DEFAULT_NAVIGATION_TOOL_3D] = 'extractor_defined';\n\n\n/******************* Helper Functions *******************/\n\n/**\n                                                            * Copies a profile settings object.\n                                                            * @param {ProfileSettings} [profileSettings] - profile settings to copy, otherwise uses the Autodesk.Viewing.ProfileSettings.Default\n                                                            * \n                                                            * @returns {ProfileSettings} - profile settings object.\n                                                            *\n                                                            * @private\n                                                            */\nfunction clone(profileSettings) {\n  if (!profileSettings) {\n    logger.log(\"ProfileSettings.clone: missing profileSettings, using DefaultProfileSettings...\");\n    profileSettings = defaults;\n  }\n  var newPS = {};\n  newPS.settings = Object.assign({}, profileSettings.settings);\n  newPS.extensions = {};\n  if (profileSettings.hasOwnProperty('extensions')) {\n    newPS.extensions.load = profileSettings.extensions.hasOwnProperty('load') ? profileSettings.extensions.load.slice() : [];\n    newPS.extensions.unload = profileSettings.extensions.hasOwnProperty('unload') ? profileSettings.extensions.unload.slice() : [];\n  } else {\n    newPS.extensions = {\n      load: [],\n      unload: [] };\n\n  }\n  newPS.persistent = profileSettings.persistent.slice();\n\n  return newPS;\n};\n\n/**\n    * ProfileSettings are used to set the viewer's profile.\n    * \n    * To generate a profile from the supplied profile settings, please reference {@link Autodesk.Viewing.Profile}.\n    * To set the viewer's profile, use {@link Autodesk.Viewing.Viewer3D#setProfile|viewer.setProfile(profile)}.\n    *\n    * @namespace Autodesk.Viewing.ProfileSettings\n    */\nexport var ProfileSettings = {\n\n  /** \n                                * Default profile settings.\n                                * It uses the preferences described in {@link Autodesk.Viewing.DefaultSettings}.\n                                * The following preferences will be persisted: alwaysUsePivot, zoomTowardsPivot, reverseHorizontalLookDirection, reverseVerticalLookDirection, orbitPastWorldPoles, clickToSetCOI, ghosting, optimizeNavigation, ambientShadows, antialiasing, groundShadows, groundReflections, firstPersonToolPopup, bimWalkToolPopup, swapBlackAndWhite, openPropertiesOnSelect, reverseMouseZoomDir, leftHandedMouseSetup, wheelSetsPivot\n                                * \n                                * @constant\n                                * @type {ProfileSettings}\n                                * @memberof Autodesk.Viewing.ProfileSettings\n                                * @default\n                                */\n  Default: defaults,\n\n\n  /** \n                      * AEC profile settings. \n                      * It inherits the settings from {@link Autodesk.Viewing.ProfileSettings.Default}.\n                      * The following preferences differ from the Default settings:\n                      * {\n                      *    edgeRendering: true, // on desktop, false on mobile.\n                      *    lightPreset: 'Boardwalk',\n                      *    envMapBackground: true\n                      * }\n                      *  \n                      * @constant\n                      * @type {ProfileSettings}\n                      * @memberof Autodesk.Viewing.ProfileSettings\n                      * @default\n                      */\n  AEC: aec,\n\n\n  /** \n             * Design Collaboration profile settings.\n             * Inherits the settings from {@link Autodesk.Viewing.ProfileSettings.AEC}.\n             * The following preferences differ from the AEC settings:\n             * {\n             *    reverseMouseZoomDir: true,\n             *    wheelSetsPivot: true,\n             *    alwaysUsePivot: true,\n             *    enableCustomOrbitToolCursor: false\n             * }\n             * \n             * @constant\n             * @type {ProfileSettings}\n             * @memberof Autodesk.Viewing.ProfileSettings\n             * @default\n             */\n  Fluent: fluent,\n\n\n  /** \n                   * Navisworks profile settings. \n                   * Inherits the settings from {@link Autodesk.Viewing.ProfileSettings.AEC}.\n                   * The following preferences differ from the AEC settings:\n                   * {\n                   *    bimWalkToolPopup: false,\n                   *    bimWalkNavigatorType: 'aec',\n                   *    defaultNavigationTool3D: 'extractor_defined'\n                   * }\n                   * \n                   * @constant\n                   * @type {ProfileSettings}\n                   * @memberof Autodesk.Viewing.ProfileSettings\n                   * @default\n                   */\n  Navis: navis,\n\n\n  /** \n                 * This function is used to clone an existing ProfileSetting.\n                 * @example\n                 * const customProfileSettings = Autodesk.Viewing.ProfileSettings.clone(Autodesk.Viewing.ProfileSettings.AEC);\n                 * \n                 * @param {ProfileSettings} [profileSettings] - profile settings to copy, otherwise clones from {@link Autodesk.Viewing.ProfileSettings.Default}.\n                 * @returns {ProfileSettings} - profile settings object.\n                 * @type {function}\n                 * @memberof Autodesk.Viewing.ProfileSettings\n                 */\n  clone: clone };","export var ProgressState = {\n  ROOT_LOADED: 0,\n  LOADING: 1,\n  RENDERING: 2 };","\nimport { inFullscreen, launchFullscreen, exitFullscreen } from \"../compat\";\nimport * as et from \"./EventTypes\";\nimport { logger } from \"../logger/Logger\";\n\nvar fsNames = ['fullscreenchange', 'mozfullscreenchange', 'webkitfullscreenchange', 'MSFullscreenChange'];\n\nfunction addListener(listener, globalManager) {\n  for (var i = 0; i < fsNames.length; ++i) {\n    globalManager.addDocumentEventListener(fsNames[i], listener, false);}\n}\n\nfunction removeListener(listener, globalManager) {\n  for (var i = 0; i < fsNames.length; ++i) {\n    globalManager.removeDocumentEventListener(fsNames[i], listener, false);}\n}\n\n\n/**\r\n   * List of available screen modes: \r\n   * - kNormal: 0 \r\n   * - kFullBrowser: 1\r\n   * - kFullScreen: 2\r\n   * @readonly\r\n   * @enum {number}\r\n   * @alias Autodesk.Viewing.ScreenMode\r\n   * @see Autodesk.Viewing.ScreenModeDelegate\r\n   */\nexport var ScreenMode = {\n  /** normal */\n  kNormal: 0,\n  /** full browser */\n  kFullBrowser: 1,\n  /** full screen */\n  kFullScreen: 2 };\n\n\n\n/**\r\n                     * Virtual base class for screen mode manipulation.\r\n                     *\r\n                     * Derive from this class and use it to allow viewer to go full screen.\r\n                     * @constructor\r\n                     * @param {Autodesk.Viewing.Viewer3D} viewer - Viewer instance.\r\n                     * @alias Autodesk.Viewing.ScreenModeDelegate\r\n                     */\nexport function ScreenModeDelegate(viewer) {\n  this.viewer = viewer;\n  this.bindFullscreenEventListener = this.fullscreenEventListener.bind(this);\n\n  if (this.getMode() === ScreenMode.kFullScreen) {\n    addListener(this.bindFullscreenEventListener, this.viewer.globalManager);\n  }\n}\n\n/**\r\n   * Perform any cleanup required for a {@link Autodesk.Viewing.ScreenModeDelegate} instance.\r\n   */\nScreenModeDelegate.prototype.uninitialize = function () {\n\n  removeListener(this.bindFullscreenEventListener, this.viewer.globalManager);\n  this.viewer = null;\n};\n\n/**\r\n    * Is screen mode supported?\r\n    * Returning false for normal mode means no screen mode changes are supported.\r\n    * @param {Autodesk.Viewing.ScreenMode} mode - Desired screen mode.\r\n    * @returns {boolean} True if screen mode is supported.\r\n    */\nScreenModeDelegate.prototype.isModeSupported = function (mode) {\n  return true;\n};\n\n/**\r\n    * Set new screen mode.\r\n    * @param {Autodesk.Viewing.ScreenMode} mode - New screen mode.\r\n    * @returns {boolean} True if screen mode was changed.\r\n    */\nScreenModeDelegate.prototype.setMode = function (mode) {\n  var currentMode = this.getMode();\n  if (mode !== currentMode && this.isModeSupported(mode)) {\n    this.doScreenModeChange(currentMode, mode);\n    this.onScreenModeChanged(currentMode, mode);\n    return true;\n  }\n  return false;\n};\n\n/**\r\n    * Override this method to get the current screen mode.\r\n    * @returns {Autodesk.Viewing.ScreenMode} Current screen mode.\r\n    */\nScreenModeDelegate.prototype.getMode = function () {\n  throw 'Implement getMode() in derived class';\n};\n\n/**\r\n    * Return next screen mode in sequence.\r\n    * Depending on what modes are supported, this may be a toggle or a 3-state.\r\n    * @returns {Autodesk.Viewing.ScreenMode|undefined} Next screen mode in sequence or undefined if no change.\r\n    */\nScreenModeDelegate.prototype.getNextMode = function () {\n  var currentMode = this.getMode(),\n  newMode;\n\n  var SM = ScreenMode;\n\n  if (currentMode === SM.kNormal &&\n  this.isModeSupported(SM.kFullBrowser)) {\n\n    newMode = SM.kFullBrowser;\n\n  } else if (currentMode === SM.kNormal &&\n  this.isModeSupported(SM.kFullScreen)) {\n\n    newMode = SM.kFullScreen;\n\n  } else if (currentMode === SM.kFullBrowser &&\n  this.isModeSupported(SM.kFullScreen)) {\n\n    newMode = SM.kFullScreen;\n\n  } else if (currentMode === SM.kFullBrowser &&\n  this.isModeSupported(SM.kNormal)) {\n\n    newMode = SM.kNormal;\n\n  } else if (currentMode === SM.kFullScreen &&\n  this.isModeSupported(SM.kNormal)) {\n\n    newMode = SM.kNormal;\n\n  } else if (currentMode === SM.kFullScreen &&\n  this.isModeSupported(SM.kFullBrowser)) {\n\n    newMode = SM.kFullBrowser;\n  }\n  return newMode;\n};\n\n/**\r\n    * Return new screen mode on escape.\r\n    * @returns {Autodesk.Viewing.ScreenMode|undefined} New screen mode or undefined if no change.\r\n    */\nScreenModeDelegate.prototype.getEscapeMode = function () {\n  return this.getMode() !== ScreenMode.kNormal ?\n  ScreenMode.kNormal : undefined;\n};\n\n/**\r\n    * Full screen event listener.\r\n    */\nScreenModeDelegate.prototype.fullscreenEventListener = function () {\n  var _document = this.viewer.globalManager.getDocument();\n  if (inFullscreen(_document)) {\n    this.viewer.resize();\n  } else {\n    this.doScreenModeChange(ScreenMode.kFullScreen, ScreenMode.kNormal);\n    this.onScreenModeChanged(ScreenMode.kFullScreen, ScreenMode.kNormal);\n  }\n};\n\n/**\r\n    * Override this method to make the screen mode change occur.\r\n    * @param {Autodesk.Viewing.ScreenMode} oldMode - Old screen mode.\r\n    * @param {Autodesk.Viewing.ScreenMode} newMode - New screen mode.\r\n    */\nScreenModeDelegate.prototype.doScreenModeChange = function (oldMode, newMode) {\n  throw 'Implement doScreenModeChange() in derived class';\n};\n\n/**\r\n    * Called after the screen mode changes.\r\n    * @param {Autodesk.Viewing.ScreenMode} oldMode - Old screen mode.\r\n    * @param {Autodesk.Viewing.ScreenMode} newMode - New screen mode.\r\n    */\nScreenModeDelegate.prototype.onScreenModeChanged = function (oldMode, newMode) {\n  if (oldMode === ScreenMode.kFullScreen) {\n    removeListener(this.bindFullscreenEventListener, this.viewer.globalManager);\n  } else if (newMode === ScreenMode.kFullScreen) {\n    addListener(this.bindFullscreenEventListener, this.viewer.globalManager);\n  }\n\n  this.viewer.resize();\n  this.viewer.dispatchEvent({ type: et.FULLSCREEN_MODE_EVENT, mode: newMode });\n};\n\n\n\n\n\n/**\r\n    * Screen mode delegate allowing the viewer to go full screen.\r\n    *\r\n    * Unlike ViewerScreenModeDelegate class, this delegate\r\n    * doesn't use the full browser state, and it takes the entire page full screen, not just\r\n    * the viewer.\r\n    * @constructor\r\n    * @extends Autodesk.Viewing.ScreenModeDelegate\r\n    * @memberof Autodesk.Viewing\r\n    * @alias Autodesk.Viewing.AppScreenModeDelegate\r\n    * @param {Autodesk.Viewing.Viewer3D} viewer - Viewer instance.\r\n    */\nexport function AppScreenModeDelegate(viewer) {\n  ScreenModeDelegate.call(this, viewer);\n};\n\nAppScreenModeDelegate.prototype = Object.create(ScreenModeDelegate.prototype);\nAppScreenModeDelegate.prototype.constructor = AppScreenModeDelegate;\n\nAppScreenModeDelegate.prototype.isModeSupported = function (mode) {\n  return mode !== ScreenMode.kFullBrowser;\n};\n\nAppScreenModeDelegate.prototype.getMode = function () {\n  var _document = this.viewer.globalManager.getDocument();\n  return inFullscreen(_document) ?\n  ScreenMode.kFullScreen :\n  ScreenMode.kNormal;\n};\n\nAppScreenModeDelegate.prototype.doScreenModeChange = function (oldMode, newMode) {\n  var container = this.viewer.container;\n  if (newMode === ScreenMode.kNormal) {\n    container.classList.remove('viewer-fill-browser');\n    var _document = this.viewer.globalManager.getDocument();\n    exitFullscreen(_document);\n  } else if (newMode === ScreenMode.kFullScreen) {\n    container.classList.add('viewer-fill-browser');\n    launchFullscreen(container);\n  }\n};\n\n// Keep the old class name for backwards compatibility\nexport var ApplicationScreenModeDelegate = AppScreenModeDelegate;\n\n\n/**\r\n                                                                   * Screen mode delegate with no full screen functionality.\r\n                                                                   * @constructor\r\n                                                                   * @extends Autodesk.Viewing.ScreenModeDelegate\r\n                                                                   * @memberof Autodesk.Viewing\r\n                                                                   * @alias Autodesk.Viewing.NullScreenModeDelegate\r\n                                                                   * @param {Autodesk.Viewing.Viewer3D} viewer - Viewer instance.\r\n                                                                   */\nexport function NullScreenModeDelegate(viewer) {\n  ScreenModeDelegate.call(this, viewer);\n};\n\nNullScreenModeDelegate.prototype = Object.create(ScreenModeDelegate.prototype);\nNullScreenModeDelegate.prototype.constructor = ScreenModeDelegate;\n\n\nNullScreenModeDelegate.prototype.isModeSupported = function (mode) {\n  return false; // No screen modes supported\n};\n\nNullScreenModeDelegate.prototype.getMode = function () {\n  return ScreenMode.kNormal;\n};\n\n\n\n\n\nexport function ScreenModeMixin() {\n};\n\n\nScreenModeMixin.prototype = {\n\n  /**\r\n                               * Set new screen mode delegate.\r\n                               * @param {Autodesk.Viewing.ScreenModeDelegate} delegate - New screen mode delegate class.\r\n                               */\n  setScreenModeDelegate: function setScreenModeDelegate(delegate) {\n    if (this.screenModeDelegate) {\n      this.screenModeDelegate.uninitialize();\n      this.screenModeDelegate = null;\n    }\n\n    // null -> Fullscreen not available\n    // undefined -> Use default AppScreenModeDelegate\n    //\n    if (delegate) {\n      this.screenModeDelegateClass = delegate;\n    } else if (delegate === null) {\n      this.screenModeDelegateClass = NullScreenModeDelegate;\n    } else {// undefined\n      this.screenModeDelegateClass = AppScreenModeDelegate;\n    }\n  },\n\n  /**\r\n      * Get current screen mode delegate.\r\n      * If no screen mode delegate has been set, then use {@link Autodesk.Viewing.ViewerScreenModeDelegate}.\r\n      * @returns {Autodesk.Viewing.ScreenModeDelegate} Current screen mode delegate.\r\n      */\n  getScreenModeDelegate: function getScreenModeDelegate() {\n    if (!this.screenModeDelegate) {\n      this.screenModeDelegate = new this.screenModeDelegateClass(this);\n    }\n    return this.screenModeDelegate;\n  },\n\n\n  /**\r\n      * Is specified screen mode supported?\r\n      * @param {Autodesk.Viewing.ScreenMode} mode - Desired screen mode.\r\n      * @returns {boolean} True if screen mode is supported.\r\n      */\n  isScreenModeSupported: function isScreenModeSupported(mode) {\n    return this.getScreenModeDelegate().isModeSupported(mode);\n  },\n\n  /**\r\n      * Is changing screen modes supported?\r\n      * @returns {boolean} True if viewer supports changing screen modes.\r\n      */\n  canChangeScreenMode: function canChangeScreenMode() {\n    return this.isScreenModeSupported(Autodesk.Viewing.ScreenMode.kNormal);\n  },\n\n  /**\r\n      * Set new screen mode.\r\n      * @param {Autodesk.Viewing.ScreenMode} mode - New screen mode.\r\n      * @returns {boolean} True if screen mode was changed.\r\n      */\n  setScreenMode: function setScreenMode(mode) {\n    var msg = {\n      category: \"screen_mode\",\n      value: mode };\n\n    logger.track(msg);\n\n    return this.getScreenModeDelegate().setMode(mode);\n  },\n\n  /**\r\n      * Get current screen mode.\r\n      * @returns {Autodesk.Viewing.ScreenMode} Current screen mode.\r\n      */\n  getScreenMode: function getScreenMode() {\n    return this.getScreenModeDelegate().getMode();\n  },\n\n  /**\r\n      * Set screen mode to next in sequence.\r\n      * @returns {boolean} True if screen mode was changed.\r\n      */\n  nextScreenMode: function nextScreenMode() {\n    var mode = this.getScreenModeDelegate().getNextMode();\n    return mode !== undefined ? this.setScreenMode(mode) : false;\n  },\n\n  /**\r\n      * Screen mode escape key handler.\r\n      * @returns {boolean} True if screen mode was changed.\r\n      */\n  escapeScreenMode: function escapeScreenMode() {\n    var mode = this.getScreenModeDelegate().getEscapeMode();\n    return mode !== undefined ? this.setScreenMode(mode) : false;\n  },\n\n\n  apply: function apply(object) {\n\n    var p = ScreenModeMixin.prototype;\n    object.setScreenModeDelegate = p.setScreenModeDelegate;\n    object.getScreenModeDelegate = p.getScreenModeDelegate;\n    object.isScreenModeSupported = p.isScreenModeSupported;\n    object.canChangeScreenMode = p.canChangeScreenMode;\n    object.setScreenMode = p.setScreenMode;\n    object.getScreenMode = p.getScreenMode;\n    object.nextScreenMode = p.nextScreenMode;\n    object.escapeScreenMode = p.escapeScreenMode;\n  } };","import { PIXEL_CULLING_THRESHOLD } from \"../wgs/globals.js\";\nimport { FrustumIntersector } from '../wgs/scene/FrustumIntersector';\nimport { RenderContext } from \"../wgs/render/RenderContext\";\nimport { getGlobal } from \"../compat\";\nimport { RenderBatch } from \"../wgs/scene/RenderBatch\";\nimport { MeshFlags } from \"../wgs/scene/MeshFlags\";\nimport { SceneMath } from \"../wgs/scene/SceneMath\";\nimport { RenderFlags } from \"../wgs/scene/RenderFlags\";\nimport * as THREE from \"three\";\nimport * as et from \"./EventTypes\";\nimport SheetRenderContext from \"../wgs/render/SheetRenderContext\";\n\n//Old screenshot function that is stil the public Viewer3D.getScreenShot API.\n//It resizes the HTML canvas element and captures that.\n// we use Blob URL, Chrome crashes when opening dataURL that is too large\n// https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL\nfunction getScreenShotLegacy(viewer, w, h, cb, overlayRenderer) {\n  var viewerImpl = viewer.impl;\n  var renderer = viewerImpl.renderer();\n  var oldWidth = renderer.settings.logicalWidth;\n  var oldHeight = renderer.settings.logicalHeight;\n  var oldProgressiveRender = viewerImpl.progressiveRender;\n  var pixelRatio = viewerImpl.glrenderer().getPixelRatio();\n\n  if (!w || !h) {\n    w = oldWidth;\n    h = oldHeight;\n  }\n\n  viewerImpl.progressiveRender = false;\n\n  // Render the scene with new size\n  viewerImpl.resize(w / pixelRatio, h / pixelRatio, true);\n\n  viewerImpl.tick(performance.now());\n  // Use an offscreen target to render the overlays\n  var finalTarget = new THREE.WebGLRenderTarget(w, h,\n  { minFilter: THREE.LinearFilter,\n    magFilter: THREE.LinearFilter,\n    format: THREE.RGBFormat,\n    type: THREE.UnsignedByteType });\n\n\n  var offscreenTargetBackup = renderer.getOffscreenTarget();\n  renderer.setOffscreenTarget(finalTarget);\n  // Rebuild the final output into the offscreen buffer.\n  renderer.presentBuffer();\n  // Turn off offscreen target\n  renderer.setOffscreenTarget(offscreenTargetBackup);\n\n  function renderToCanvas() {\n\n    var res = renderer.targetToCanvas(finalTarget || renderer.getColorTarget());\n    // Dispose of the offscreen target, if there is one\n    if (finalTarget) {\n      finalTarget.dispose();\n      finalTarget = undefined;\n\n      // Make sure that we don't leave a deleted target assigned in WebGLRenderer.\n      // This avoids a WebGL warning \"WebGL: INVALID_OPERATION: bindFramebuffer: attempt to use a deleted object\"\n      // in WebGlRenderer.initFrameBuffer later. Note that this warning would happen even if no one actually renders to this target.\n      viewerImpl.glrenderer().setRenderTarget(null);\n    }\n\n    function finalizeRender() {\n      // Resize the render context back the original size\n      viewerImpl.progressiveRender = oldProgressiveRender;\n      viewerImpl.resize(oldWidth, oldHeight, true);\n\n      res.canvas.toBlob(function (blob) {\n        var newBlobURL = getGlobal().URL.createObjectURL(blob);\n        if (cb) {\n          cb(newBlobURL);\n        } else {\n          getGlobal().open(newBlobURL);\n        }\n      }, 'image/png');\n    }\n\n    if (overlayRenderer) {\n      overlayRenderer(res.ctx, finalizeRender);\n    } else {\n      finalizeRender();\n    }\n  }\n\n  // In case the model is leaflet, we should wait until all the tiles will be downloaded in the new scale.\n  // Otherwise, the screenshot will be pixelated.\n  if (viewer.model.isLeaflet()) {\n\n    var cancelLeafletScreenshot = false;\n\n    function cancelCB() {\n      cancelLeafletScreenshot = true;\n      viewerImpl.progressiveRender = oldProgressiveRender;\n      viewerImpl.resize(oldWidth, oldHeight, true);\n    }\n\n    viewer.addEventListener(et.CANCEL_LEAFLET_SCREENSHOT, cancelCB, { once: true });\n\n    // invalidate is needed here in order to make sure that the iterator's reset method will be called.\n    viewerImpl.invalidate(true);\n    viewer.model.getIterator().callWhenRefined(function () {\n      if (!cancelLeafletScreenshot) {\n        viewer.removeEventListener(et.CANCEL_LEAFLET_SCREENSHOT, cancelCB);\n        renderToCanvas();\n      }\n    });\n  } else {\n    renderToCanvas();\n  }\n\n  // Dispose of the offscreen target, if there is one\n  if (finalTarget)\n  finalTarget.dispose();\n}\n\n\n// Creates a blob containing a snapshot and passes result to onFinished.\n// It runs in the background parallel to main rendering.\n// \n//  @param {function(result)} onFinished - Gets the blob with the result image. If options.returnAsTarget is true, \n//                                         it is called with (renderContext, renderTarget, camera, sheetRenderer) instead.\n//  @param {UnifiedCamera}    [options.camera]       - If undefined, we use a copy of the current main camera\n//  @param {function(number)} [options.onProgress]   - progress callback. Gets progress value as integer\n//  @param {RenderContext}    [options.renderContext]- optional render context to use for the screenshot rendering\n//  @param {SheetRenderContext}[options.sheetRenderer]- optional sheet render context to use for screenshot rendering\n//  @param {Object}           [options.renderConfig] - custom RenderContext configuration (by default, we use the config of the main renderer)\n//  @param {function()}       [options.beforeRender] - triggered before rendering into the screenshot. This allows to apply temporary changes \n//                                                     (e.g. on materials) that would affect main rendering otherwise.\n//  @param {function()}       [options.afterRender]  - triggered after rendering into snapshot. Use this to revert/cleanup any changes done in beforeRender.\n//  @param {av.Model[]}       [options.models]       - Array of RenderModels to appear in the screenshot. (Default: all currently visible ones)\n//  @param {Object}           [options.fragOptions]  - By default, visibility and ghosting of fragments are 1:1 inherited from main viewer.\n//                                                     Optionally, fragOptions allow for customizing fragment states, e.g. to force everything to be visible.\n//                                                     Return undefined to preserve original fragment state. Available options:\n//                                                         fragOptions.isFragVisible: see FragmentList.setVisibility {function(fragId)=>bool}\n//                                                         fragOptions.isFragOff:     see FragmentList.setFragOff    {function(fragId)=>bool} \n//  @param {bool}             [options.excludeCutPlanes] - By default, cutplanes are inherited from main view. This flag makes the screenshot independent\n//                                                         of any active cutplanes.\n//  @param {bool}             [options.excludeThemingColors] - By default (false), theming colors are inherited from main view. \n//                                                             Note: This option only supports 3D so far.\n//  @param {bool}             [options.is2d]             - By default, we decide dimensionality from main viewer.\n//  @param {bool}             [options.dontWaitForLeafletTiles] - By default, we wait until all the leaflet tiles are being fully loaded before we complete the render.\n//                                                                If set to true, we just use the low res tiles if the high res tiles don't exist yet.\n//  @param {Viewer3DImpl}     viewerImpl             - main viewer instance - to get glRenderer, material manager, default models etc.\n//  @returns {Object} Control object C: Use...\n//                    - C.stop() to cancel computation\n//                    - C.finished() to check if it's done\n//\n// Known limitations:\n//  - Rendering overlays is currently not supported.\n//  - When using custom render settings: AO can only be used if the main canvas uses it as well. This is because materials are shared and must be compiled differently based \n//                                       whether a depth target is used (as for AO)\nvar getScreenShot = function getScreenShot(w, h, onFinished, options, viewerImpl) {var _sheetRenderer;\n\n  var materials = viewerImpl.getMaterials();\n  var webglrenderer = viewerImpl.glrenderer();\n  var renderer = viewerImpl.renderer();\n  var modelQueue = viewerImpl.modelQueue();\n\n  options = options || {};\n\n  // get scenes\n  var scenes = [];\n  var models = options.models || modelQueue.getModels();\n\n  for (var i = 0; i < models.length; i++) {\n    var model = models[i];\n    var iter = model.getIterator();\n\n    // skip models that don't support getGeomScenes (e.g. leaflets)\n    // Leaflet scenes are handled separately below.\n    if (!iter || !iter.getGeomScenes) {\n      continue;\n    }\n\n    // Collect all scenes from next model\n    var modelScenes = iter.getGeomScenes();\n    for (var j = 0; j < modelScenes.length; j++) {\n      // Some scenes may not exist. E.g., if it corresponds to an empty BVH node.\n      var scene = modelScenes[j];\n      if (scene) {\n        scenes.push(scene);\n      }\n    }\n  }\n\n  var camera = options.camera || viewerImpl.camera;\n\n  // Make sure that we never use the same camera object as the main canvas. Otherwise, tools may modify the camera and affect the\n  // screenshot during rendering.\n  if (camera === viewerImpl.camera) {\n    camera = camera.clone();\n  }\n\n  // Make sure the camera client width/height is set according to screenshot custom size\n  camera.clientWidth = w;\n  camera.clientHeight = h;\n\n  // Screenshots may contain objects that are culled in the main canvas.\n  // Therefore, we need this apply correct culling for RenderBatches.\n  var frustum = new FrustumIntersector();\n  var cutplanes = options.excludeCutPlanes ? [] : materials.getCutPlanes();\n  frustum.reset(camera, cutplanes);\n  frustum.areaCullThreshold = PIXEL_CULLING_THRESHOLD;\n\n  // We share WebGLRenderer with main rendering \n  // => Make sure that viewport keeps unaffected.\n  webglrenderer.pushViewport();\n\n  // Preserve pixelRatio based on browser device pixel size.\n  // For offline rendering, we use 1:1 to get exactly the desired resolution.\n  webglrenderer.setPixelRatio(1.0);\n\n  var ctx;\n\n  // create temp RenderContext\n  if (options.renderContext) {\n    ctx = options.renderContext;\n  } else {\n    ctx = new RenderContext();\n    ctx.init(webglrenderer, w, h, { offscreen: true });\n  }\n\n  var sheetRenderer;\n  if (viewerImpl.isSheetRendererNeeded()) {\n    if (options.sheetRenderer) {\n      sheetRenderer = options.sheetRenderer;\n    } else {\n      sheetRenderer = new SheetRenderContext(ctx, webglrenderer, materials);\n    }\n  }\n\n  // Make sure that cutplanes are consistently applied to override materials of our new RenderContext.\n  // Note: We are replacing these override materials on each screenshot call. This will not work anymore \n  //       if anyone runs multiple screenshots in parallel (which would work otherwise).\n  //       For this, we would need to use unique ids here and always clean-up the materials afterwards.\n  materials.addOverrideMaterial(\"normalsMaterial_screenshot\", ctx.getDepthMaterial());\n  materials.addOverrideMaterial(\"edgeMaterial_screenshot\", ctx.getEdgeMaterial());\n\n  // by default, configure RenderContext in the same way as for main rendering (edges, cubemap etc.)\n  var cfg = options.renderConfig || renderer.getConfig();\n  ctx.applyConfig(cfg);\n\n  // Render scenes\n  ctx.beginScene(viewerImpl.scene, camera, viewerImpl.noLights, true);\n  (_sheetRenderer = sheetRenderer) === null || _sheetRenderer === void 0 ? void 0 : _sheetRenderer.beginScene(viewerImpl.scene, camera, viewerImpl.noLights);\n\n  webglrenderer.popViewport();\n\n  // recover original pixel ratio\n  webglrenderer.setPixelRatio();\n\n  var MaxTimePerCycle = 20; // Time in ms that we allow per cycle\n  var sceneIndex = 0; // Next scene to be rendered\n\n  // Allow safe interruptions from outside\n  var reqId = undefined;\n  var control = {\n    stop: function stop() {\n      if (!reqId) {\n        return;\n      }\n      // cancel timeout\n      getGlobal().clearTimeout(reqId);\n\n      // if there are leaflets, tell them that there is no need anymore to\n      // refine them for the screenshot.\n      releaseLeafLetViews();\n    },\n    finished: function finished() {return !!reqId;} };\n\n\n  var lastProgress = -1;\n\n  // Leaflets: Register separate views to make sure that the tiles are loaded without affecting the main view\n  var leaflets = [];\n  for (var _i = 0; _i < models.length; _i++) {\n    var _model = models[_i];\n    if (_model.isLeaflet()) {\n      var _iter = _model.getIterator();\n      leaflets.push({\n        iter: _iter,\n        viewId: _iter.registerView(),\n        ready: false // fully refined and ready for rendering\n      });\n    }\n  }\n\n  // Continue refinement of leaflets for this screenshot. Returns true when done.\n  var continueLeafletRefine = function continueLeafletRefine() {\n    var allReady = true;\n    for (var _i2 = 0; _i2 < leaflets.length; _i2++) {\n      var leaflet = leaflets[_i2];\n      if (!leaflet.ready) {\n        leaflet.ready = leaflet.iter.reset(frustum, camera, leaflet.viewId);\n      }\n      allReady = allReady && leaflet.ready;\n    }\n\n    allReady = allReady || options.dontWaitForLeafletTiles;\n\n    // Once leaflets are ready, collect the scenes to be rendered\n    if (allReady) {\n      for (var _i3 = 0; _i3 < leaflets.length; _i3++) {\n        var _leaflet = leaflets[_i3];\n        var _scene = _leaflet.iter.getScene(_leaflet.viewId);\n        scenes.push(_scene);\n      }\n    }\n\n    // When done, collect \n    return allReady;\n  };\n\n  // When leaflet rendering is done, unregister view so that the leaflet iterator\n  // knows that the tiles are allowed to be deleted in cache cleanups later.\n  var releaseLeafLetViews = function releaseLeafLetViews() {\n    // Release tiles needs for leaflets\n    leaflets.forEach(function (l) {return l.iter.unregisterView(l.viewId);});\n    leaflets.length = 0;\n  };\n\n  // Used to remember fragment states per scene if we use overrides\n  var fragOptions = options.fragOptions;\n  var visFlags = fragOptions ? [] : undefined;\n\n  // Optional: Remember fragment states and overwrite with custom ones\n  var applyFragmentOverrides = function applyFragmentOverrides(scene) {\n\n    // Note: Since we work on unconsolidated geometry, we assume here that Fragments are \n    //       always rendered using RenderBatches. Without that, things would get a bit more\n    //       complicated here.\n    var useOverrides = !!fragOptions && scene instanceof RenderBatch;\n    if (!useOverrides) {\n      return;\n    }\n\n    var fragList = scene.frags;\n    var overrideFragState = function overrideFragState(fragId, index) {\n\n      // remember original fragment flags per scene\n      visFlags[index] = fragList.vizflags[fragId];\n\n      // We set the flags directly here without affecting allVisibleDirty,\n      // because we recover the orginal state before returning to main render.\n\n      // Customize isFragOff flag\n      var isOff = fragOptions.isFragOff && fragOptions.isFragOff(fragId);\n      if (isOff !== undefined) {\n        fragList.setFlagFragment(fragId, MeshFlags.MESH_HIDE, isOff);\n      }\n\n      // Customize isVisible\n      var isVisible = fragOptions.isFragVisible && fragOptions.isFragVisible(fragId);\n      if (isVisible !== undefined) {\n        fragList.setFlagFragment(fragId, MeshFlags.MESH_VISIBLE, isVisible);\n      }\n    };\n    scene.forEachNoMesh(overrideFragState);\n  };\n\n  // Restore original state for all fragments of a RenderBatch\n  var revertFragmentOverrides = function revertFragmentOverrides(scene) {\n\n    var useOverrides = !!fragOptions && scene instanceof RenderBatch;\n    if (!useOverrides) {\n      return;\n    }\n\n    var fragList = scene.frags;\n    var recoverFragState = function recoverFragState(fragId, index) {\n      var flags = visFlags[index];\n      var wasOff = !!(flags & MeshFlags.MESH_HIDE);\n      var wasVisible = !!(flags & MeshFlags.MESH_VISIBLE);\n\n      fragList.setFlagFragment(fragId, MeshFlags.MESH_HIDE, wasOff);\n      fragList.setFlagFragment(fragId, MeshFlags.MESH_VISIBLE, wasVisible);\n    };\n    scene.forEachNoMesh(recoverFragState);\n  };\n\n  // Determine pixelPerUnit parameter for this screenshot\n  var getPixelsPerUnitValue = function getPixelsPerUnitValue() {\n\n    // Get bounds from viewer - unless we have custom models\n    var worldBox = undefined;\n    if (!options.models) {\n      worldBox = viewerImpl.getVisibleBounds();\n    } else {\n      // If we have custom models, we use the summed model bounds.\n      // Note: Strictly speaking, we would need to consider individual fragment visibility/overrides here too.\n      //       But this would make things even more complicated here and only might make a difference in edge cases.\n      worldBox = new THREE.Box3();\n      for (var _i4 = 0; _i4 < models.length; _i4++) {\n        var _model2 = models[_i4];\n        worldBox.union(_model2.getBoundingBox());\n      }\n    }\n\n    // initialized after ctx.beginScene() - which also sets up the render targets on first call.\n    var is2d = options.hasOwnProperty('is2d') ? options.is2d : viewerImpl.is2d;\n\n    // It is important that we call it after ctx.beginScene(), so that these values are initialized.\n    var deviceHeight = ctx.settings.deviceHeight;\n\n    // Consider cutplane if wanted\n    var cutPlanes = options.excludeCutPlanes ? undefined : materials.getCutPlanesRaw();\n    var cutPlane = cutPlanes && cutPlanes[0];\n\n    // For 2d: If we have a sheet model box, its base elevation is considered as reference plane for 2d rendering.\n    var modelBox = models[0] && models[0].getBoundingBox();\n\n    // Note that getPixelsPerUnit() uses the _deviceHeight of the RenderContext. This value is only\n    return SceneMath.getPixelsPerUnit(camera, is2d, worldBox, deviceHeight, cutPlane, modelBox);\n  };\n  var pixelsPerUnit = getPixelsPerUnitValue();\n\n  // Decouple theming from main rendering\n  var EmptyThemingColors = []; // temporarily used empty theming-color table\n  var themingColors = null; // temporarily used to backup original theming colors\n  var disableThemingColors = function disableThemingColors(scene) {\n\n    if (!options.excludeThemingColors || !(scene instanceof RenderBatch)) {\n      return;\n    }\n\n    // This option is only supported for 3d atm. For 2d, we would need some\n    // extra work because theming-colors are stored per vertex.\n    if (scene.frags.is2d) {\n      return;\n    }\n\n    themingColors = scene.frags.db2ThemingColor;\n    scene.frags.db2ThemingColor = EmptyThemingColors;\n  };\n  var restoreThemingColors = function restoreThemingColors(scene) {\n    if (!themingColors) {\n      return;\n    }\n    scene.frags.db2ThemingColor = themingColors;\n    themingColors = null;\n  };\n\n  // Note: Changing the number of cutplanes on each render cycle would trigger repeated shader recompiles (see MaterialManager.setCutPlanes)\n  //       Changing the cutplane values is much cheaper and just changes a shader param.\n  //       => To temporarily nuke a cutplane, we just change it to only exclude shapes in outer space\n  var dummyCutPlane = new THREE.Vector4(0, 0, -1, -1e+20);\n  var dummyCutPlanes = [];\n  var originalCutPlanes = null;\n\n  var disableCutPlanes = function disableCutPlanes() {\n    // Note that the cutplanes in main view may change at any time.\n    // So we have to get them again when an update cycle starts.\n    originalCutPlanes = materials.getCutPlanes();\n\n    // make sure that dummyCutPlanes has the same length\n    var planeCount = originalCutPlanes.length;\n    if (dummyCutPlanes.length !== planeCount) {\n      dummyCutPlanes.length = planeCount;\n      for (var _i5 = 0; _i5 < planeCount; _i5++) {\n        dummyCutPlanes[_i5] = dummyCutPlane;\n      }\n    }\n    renderer.toggleTwoSided(materials.setCutPlanes(dummyCutPlanes));\n  };\n\n  var recoverCutPlanes = function recoverCutPlanes() {\n    renderer.toggleTwoSided(materials.setCutPlanes(originalCutPlanes));\n  };\n\n  var onRenderDone = function onRenderDone() {\n\n    releaseLeafLetViews();\n\n    // In the simplest case, we can just read-back the color-target directly.\n    var finalTarget = ctx.getColorTarget();\n\n    // If we need post-processing (SAO/FXAA), we must run presentBuffer to\n    // render into an offscreen target.\n    var needsPostProcess = cfg.aoEnabled || cfg.antialias;\n    if (needsPostProcess) {\n\n      if (cfg.aoEnabled) {\n        ctx.computeSSAO();\n      }\n\n      // Note: We don't render overlays in screenshots. So, we can simply use \n      //       the overlay target for final present. If you want to add overlay support\n      //       as well, you either have to allocate a new target or things get a bit more complicated:\n      //       The target to use leties with configuration and you have to choose one\n      //       that a) exists and b) is not used as src in the final pass.\n      finalTarget = ctx.getNamedTarget('overlay');\n\n      // Make sure that blend pass doesn't read from overlay target while writing to it.\n      ctx.getBlendPass().uniforms['tOverlay'].value = null;\n\n      ctx.setOffscreenTarget(finalTarget);\n      ctx.presentBuffer();\n    }\n\n    if (options.returnAsTarget) {\n      onFinished(ctx, finalTarget, camera, sheetRenderer);\n      return;\n    }\n\n    if (!options.sheetRenderer) {var _sheetRenderer2; // Destroy only if it was created (and it's not being returned)\n      (_sheetRenderer2 = sheetRenderer) === null || _sheetRenderer2 === void 0 ? void 0 : _sheetRenderer2.destroy();\n      sheetRenderer = null;\n    }\n\n    // read result into blob\n    var res = ctx.targetToCanvas(finalTarget);\n    res.canvas.toBlob(function (blob) {\n      var newBlobURL = getGlobal().URL.createObjectURL(blob);\n      if (onFinished) {\n        onFinished(newBlobURL);\n      }\n    });\n  };\n\n  var continueRender = function continueRender() {\n\n    // Leaflets may need to be refined first\n    var waitForLeaflets = !continueLeafletRefine();\n    if (waitForLeaflets) {\n      reqId = getGlobal().setTimeout(continueRender, 0);\n      return;\n    }\n\n    // Render scenes until time is up or all scenes are done\n    var tStart = performance.now();\n\n    webglrenderer.pushViewport();\n\n    // Preserve pixelRatio based on browser device pixel size.\n    // For offline rendering, we use 1:1 to get exactly the desired resolution.\n    webglrenderer.setPixelRatio(1.0);\n\n    // Please note that pixelratio is also used to define the viewport.\n    webglrenderer.setViewport(0, 0, w, h);\n\n    var pixelsPerUnitBackup = viewerImpl.getPixelsPerUnit(viewerImpl.camera, viewerImpl.getVisibleBounds());\n    materials.updatePixelScale(pixelsPerUnit, w, h);\n\n    // Disable cutplanes if not wanted in the screenshot\n    if (options.excludeCutPlanes) {\n      disableCutPlanes();\n    }\n\n    // Allow client to do custom modifcations without affecting main rendering\n    options.beforeRender && options.beforeRender();\n\n    while (sceneIndex < scenes.length) {\n      var _scene2 = scenes[sceneIndex];\n\n      // If specified, apply custom values for fragment states (ghosting, fragOff)\n      // Note that these flags are not evaluated in renderScenePart, but earlier\n      // in applyVisibility() already.\n      applyFragmentOverrides(_scene2);\n\n      disableThemingColors(_scene2);\n      // Make sure that culling is applied based on screenshot camera. Without this code, some parts would be\n      // missing if they are currently not visible in the main canvas.\n      if (_scene2 instanceof RenderBatch) {\n        _scene2.applyVisibility(RenderFlags.RENDER_NORMAL, frustum);\n      }\n\n      if (sheetRenderer && _scene2.frags.is2d) {\n        sheetRenderer.renderScenePart(_scene2, true, true, false, ctx);\n      } else {\n        ctx.renderScenePart(_scene2, true, true, false, false);\n\n        // Render ghosted objects.\n        if (_scene2.frags && !_scene2.frags.areAllVisible() || fragOptions) {\n          if (_scene2 instanceof RenderBatch) {\n            _scene2.applyVisibility(RenderFlags.RENDER_HIDDEN, frustum);\n          }\n\n          // Configure for ghosting\n          renderer.setEdgeColor(viewerImpl.edgeColorGhosted);\n          _scene2.overrideMaterial = viewerImpl.fadeMaterial;\n\n          ctx.renderScenePart(_scene2, true, true, false, false);\n\n          // Restore edge color and reset override material\n          renderer.setEdgeColor(viewerImpl.edgeColorMain);\n          _scene2.overrideMaterial = null;\n        }\n      }\n\n      restoreThemingColors(_scene2);\n\n      revertFragmentOverrides(_scene2);\n\n      sceneIndex++;\n\n      // stop loop if time is up\n      var elapsed = performance.now() - tStart;\n      if (elapsed > MaxTimePerCycle) {\n        break;\n      }\n    }\n    webglrenderer.popViewport();\n\n    // recover original pixel ratio\n    webglrenderer.setPixelRatio();\n\n    materials.updatePixelScale(pixelsPerUnitBackup, renderer.settings.deviceWidth, renderer.settings.deviceHeight);\n\n    // Recover cutplanes for main view rendering\n    if (options.excludeCutPlanes) {\n      recoverCutPlanes();\n    }\n\n    // Allow client to remove custom modifications before main canvas renders again\n    options.afterRender && options.afterRender();\n\n    // If we are done...\n    if (sceneIndex === scenes.length) {\n      // ...start image readback\n      onRenderDone();\n    } else {\n      // Otherwise, let a bit time for main rendering and continue later.\n      reqId = getGlobal().setTimeout(continueRender, 0);\n    }\n\n    // track progress\n    if (options.onProgress) {\n      var percent = Math.floor(100 * sceneIndex / scenes.length);\n      if (percent !== lastProgress) {\n        lastProgress = percent;\n        options.onProgress(percent);\n      }\n    }\n  };\n\n  continueRender();\n\n  return control;\n};\n\n/**\n    * Creates a screenshot of the viewer, with extra parameters to enable more control.\n    * Common uses are for creating screenshot with an overlay, specific bounds and crop.\n    * The output image returns as blob, inside onDone callback.\n    * \n    * @param {Viewer3D} [viewer] - Viewer instance\n    * @param {Number} [width] - Width of the screenshot, before cropping.\n    * @param {Number} [height] - Height of the screenshot, before cropping.\n    * @param {Function} [onDone] - A callback called when the screenshot is ready. Signature: onDone(blobUrl, outputWidth, outputHeight);\n    * @param {Object} [options] - Additional initialization options. Not mandatory.\n    * @param {Boolean} [options.fullPage] - For 2D documents only. Output will be a cropped image of the viewer, without the grey background.\n    * @param {THREE.Box3} [options.bounds] - Bounds in world coordinates of the screenshot. The virtual camera of the screenshot will zoom in to these bounds.\n    * @param {Function} [options.getCropBounds] - A callback used to get crop bounds of the image. Signature: getCropBounds(viewer, camera, bounds).\n    * @param {Number} [options.margin] - Extra margin over the bounds.\n    * @param {Function} [options.overlayRenderer] - a callback used to render an overlay on top of the viewer. Signature: overlayRenderer(viewer, opt, overlayRendererExtraOptions)\n    * @param {Object} [options.overlayRendererExtraOptions] - Extra options object used only by the overlayRenderer.\n    *\n    * @private\n    */\nvar getScreenShotWithBounds = function getScreenShotWithBounds(viewer, width, height, onDone, options) {var\n\n  fullPage =\n  options.fullPage,bounds = options.bounds,getCropBounds = options.getCropBounds,margin = options.margin,overlayRenderer = options.overlayRenderer,overlayRendererExtraOptions = options.overlayRendererExtraOptions;\n\n  if (fullPage) {\n    bounds = viewer.impl.getVisibleBounds();\n  }\n\n  var canvasBounds = viewer.impl.getCanvasBoundingClientRect();\n  var originalWidth = canvasBounds.width;\n\n  var camera = viewer.navigation.getCamera();\n\n  if (bounds) {\n    camera = getCameraWithFitBounds(viewer, bounds, margin);\n  }\n\n  var sceneBounds = getSceneClientBounds(viewer, camera);\n\n  try {\n    // Scale the viewer so the full render width won't contain the gray canvas layout.\n    if (fullPage) {\n      var sceneBoundsSize = sceneBounds.size();\n      var ratio = originalWidth / Math.max(sceneBoundsSize.x, sceneBoundsSize.y);\n      width = Math.floor(width * ratio);\n      height = Math.floor(height * ratio);\n    }\n\n    // This callback is used for cropping the image.\n    var cropScreenshot = function cropScreenshot(canvas) {\n      // In case of a 2D full page, crop the view so the image will be without the gray margin.\n      if (fullPage) {\n        var scaleRatio = width / originalWidth;\n\n        sceneBounds.min.x *= scaleRatio;\n        sceneBounds.min.y *= scaleRatio;\n        sceneBounds.max.x *= scaleRatio;\n        sceneBounds.max.y *= scaleRatio;\n\n        cropImage(canvas, sceneBounds, onDone);\n        // Crop to a specific bounding box\n      } else if (getCropBounds) {\n        var clientBounds = getCropBounds(viewer, camera, bounds);\n        cropImage(canvas, clientBounds, onDone);\n        // Don't crop anything, just call onDone\n      } else {\n        canvas.toBlob(function (blob) {\n          var blobUrl = getGlobal().URL.createObjectURL(blob);\n          onDone(blobUrl, width, height);\n        });\n      }\n    };\n\n    // Deselect everything before taking the screenshot.\n    var selected = viewer.impl.selector.getSelection();\n    viewer.clearSelection();\n\n    return getScreenShot(width, height, function (ctx, target, screenshotCamera) {\n      viewer.impl.selector.setSelection(selected);\n\n      if (overlayRenderer) {\n        var opt = {\n          width: width,\n          height: height,\n          ctx: ctx,\n          target: target,\n          screenshotCamera: screenshotCamera,\n          onRenderDone: cropScreenshot };\n\n        overlayRenderer(viewer, opt, overlayRendererExtraOptions);\n      } else {var _ctx$targetToCanvas =\n        ctx.targetToCanvas(target),canvas = _ctx$targetToCanvas.canvas;\n        cropScreenshot(canvas);\n      }\n    }, { returnAsTarget: true, camera: camera }, viewer.impl);\n  } catch (error) {\n    console.error('getScreenShot error: ' + error);\n    onDone(null);\n  }\n};\n\n/**\n    * Creates a screenshot of the viewer, in original screen resolution.\n    * Common uses are for creating thumbnails.\n    * The output image returns as base64 image, inside callback.\n    * \n    * @param {Viewer3D} [viewer] - Viewer instance\n    * @param {Function} [callback] - A callback called when the screenshot is ready. Signature: callback(base64Image);\n    * @param {Object} [options] - Optional - Additional initialization options. See getScreenShot Documentation for more details.\n    * \n    * @private\n    */\nvar getScreenShotAtScreenSize = function getScreenShotAtScreenSize(viewer, callback, options) {\n  var canvasBounds = viewer.impl.getCanvasBoundingClientRect();\n  var width = Math.floor(canvasBounds.width);\n  var height = Math.floor(canvasBounds.height);\n\n  var onDone = function onDone(blob, outputWidth, outputHeight) {\n    if (!blob) {\n      callback(null);\n      return;\n    }\n\n    blobToImage(blob, outputWidth, outputHeight, function (img) {\n      callback(img, outputWidth, outputHeight);\n    });\n  };\n\n  getScreenShotWithBounds(viewer, width, height, onDone, options);\n};\n\n/**\n    * Returns the scene's client bounding box. In case of F2D, it will return the bounds without the gray area.\n    * @private\n    */\nvar getSceneClientBounds = function getSceneClientBounds(viewer, camera) {\n  var worldBounds = viewer.impl.getVisibleBounds(undefined, undefined, undefined, true); // exclude shadows\n\n  var min = viewer.worldToClient(worldBounds.min, camera);\n  var max = viewer.worldToClient(worldBounds.max, camera);\n\n  var bbox = new THREE.Box3().setFromPoints([min, max]);\n\n  return bbox;\n};\n\n// Crops an image according to given bounds.\n// Output as blobUrl.\nvar cropImage = function cropImage(canvas, bounds, callback) {\n  var _document = getGlobal().document;\n  var tmpCanvas = _document.createElement('canvas');\n  var tmpCtx = tmpCanvas.getContext('2d');\n  var size = bounds.size();\n  var imageWidth = Math.min(Math.floor(size.x), canvas.width);\n  var imageHeight = Math.min(Math.floor(size.y), canvas.height);\n  tmpCanvas.width = imageWidth;\n  tmpCanvas.height = imageHeight;\n\n  var cropFromX = Math.max(Math.floor(bounds.min.x), 0);\n  var cropFromY = Math.max(Math.floor(bounds.min.y), 0);\n  var cropToX = imageWidth;\n  var cropToY = imageHeight;\n  tmpCtx.drawImage(canvas, cropFromX, cropFromY, cropToX, cropToY, 0, 0, imageWidth, imageHeight);\n\n  tmpCanvas.toBlob(function (blob) {\n    var newBlobURL = getGlobal().URL.createObjectURL(blob);\n    callback(newBlobURL, imageWidth, imageHeight);\n  }, 'image/png');\n};\n\n// Converts blobUrl to base64 image.\nvar blobToImage = function blobToImage(blobUrl, width, height, callback) {\n  var _document = getGlobal().document;\n  var tmpCanvas = _document.createElement('canvas');\n  var tmpCtx = tmpCanvas.getContext('2d');\n  var img = new Image();\n\n  tmpCanvas.width = width;\n  tmpCanvas.height = height;\n  img.src = blobUrl;\n\n  img.onload = function () {\n    tmpCtx.drawImage(img, 0, 0, width, height);\n    var outputImg = tmpCanvas.toDataURL('image/png');\n    callback(outputImg);\n  };\n};\n\n// Converts given bounds object to square bounds.\nvar makeBoundsSquare = function makeBoundsSquare(bounds) {var minValue = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;\n  var size = bounds.size();\n  var maxSize = Math.max(size.x, size.y, minValue);\n  bounds.expandByVector(new THREE.Vector3((maxSize - size.x) / 2, (maxSize - size.y) / 2, 0));\n};\n\n// Get camera with fit bounds.\nvar getCameraWithFitBounds = function getCameraWithFitBounds(viewer, bounds, margin) {\n  margin = margin || viewer.navigation.FIT_TO_VIEW_HORIZONTAL_MARGIN;\n\n  var marginBackup = {\n    horizontal: viewer.navigation.FIT_TO_VIEW_HORIZONTAL_MARGIN,\n    vertical: viewer.navigation.FIT_TO_VIEW_VERTICAL_MARGIN };\n\n\n  // Change global bounds margins.\n  viewer.navigation.FIT_TO_VIEW_HORIZONTAL_MARGIN = margin;\n  viewer.navigation.FIT_TO_VIEW_VERTICAL_MARGIN = margin;\n\n  // Get a clone of the camera in a fit to view position\n  var camState = viewer.getState({ viewport: true });\n  viewer.navigation.fitBounds(true, bounds, false);\n\n  // Clone virtual camera\n  var camera = viewer.navigation.getCamera().clone();\n\n  // Restore global bound margins & camera.\n  viewer.restoreState(camState, undefined, true);\n  viewer.navigation.FIT_TO_VIEW_HORIZONTAL_MARGIN = marginBackup.horizontal;\n  viewer.navigation.FIT_TO_VIEW_VERTICAL_MARGIN = marginBackup.vertical;\n\n  // Update camera's near-far values\n  viewer.impl.updateNearFarValues(camera, bounds);\n\n  return camera;\n};\n\n\n/**\n    * Contains static functions for capturing screenshots from the viewer.\n    * @namespace Autodesk.Viewing.ScreenShot\n    */\nexport var ScreenShot = {\n  getScreenShotLegacy: getScreenShotLegacy,\n  getScreenShot: getScreenShot,\n  getScreenShotWithBounds: getScreenShotWithBounds,\n  getScreenShotAtScreenSize: getScreenShotAtScreenSize,\n  getSceneClientBounds: getSceneClientBounds,\n  cropImage: cropImage,\n  blobToImage: blobToImage,\n  makeBoundsSquare: makeBoundsSquare,\n  getCameraWithFitBounds: getCameraWithFitBounds };","import { LocalStorage } from \"./LocalStorage\";\nimport { endpoint, initLoadContext, getEnv } from '../file-loaders/net/endpoints';\nimport { ViewingService } from '../file-loaders/net/Xhr';\nimport { getGlobal } from '../compat';\nimport { EnvironmentConfigurations } from \"../envinit\";\n\nvar DEFAULT_THUMBNAIL_SIZE = 200; // pixels\n\n/**\n * @param {BubbleNode} bubbleNode - The geometry node for the thumbnail.\n * @param {object} [options] - Bag of options.\n * @param {number} [size=200] - Thumbnail's with and height. Default is 200 pixels.\n *\n * @returns Promise - That resolves with a string URL\n *\n * @private\n */\nfunction getUrlForBubbleNode(bubbleNode, options) {\n\n  if (!bubbleNode)\n  return Promise.reject(new Error('Missing instance of BubbleNode'));\n\n  var geomNode = bubbleNode.findParentGeom2Dor3D();\n  if (!geomNode)\n  return Promise.reject(new Error('No thumbnail available.'));\n\n  options = options || {};\n  var size = options.size || DEFAULT_THUMBNAIL_SIZE;\n\n  // Check PDF\n  if (bubbleNode.getRootNode().data.isVectorPDF || !!geomNode.data.isVectorPDF) {\n\n    return new Promise(function (resolve) {\n\n      var item = bubbleNode.data;\n      var pdfObj = bubbleNode.getRootNode().data.getPDF();\n      var width = size;\n      var height = size;\n      var key = \"\".concat(item.guid, \"/thumbnail/\").concat(width, \"x\").concat(height);\n\n      renderForPDF(pdfObj, item.page, width, height, key, resolve);\n    });\n  }\n\n  // DS thumbnail\n  return new Promise(function (resolve, reject) {\n\n    var rootNode = bubbleNode.getRootNode();\n    var data = {\n      urn: rootNode.urn(),\n      width: size,\n      height: size,\n      guid: encodeURIComponent(bubbleNode.guid()),\n      acmsession: endpoint.getAcmSession() };\n\n\n    var onSuccess = function onSuccess(response) {\n      var reader = new FileReader();\n      reader.onload = function (e) {\n        var srcUrl = e.target.result;\n        resolve(srcUrl);\n      };\n      reader.readAsDataURL(response);\n    };\n\n    var onError = function onError(something) {\n      reject(new Error('Thumbnail is unavailable.'));\n    };\n\n    var options = {\n      responseType: 'blob',\n      skipAssetCallback: true,\n      size: size,\n      guid: data.guid,\n      acmsession: data.acmSession };\n\n\n\n    var urlpath = \"urn:\" + data.urn; //HACK: Adding urn: makes the ViewingServiceXhr accept this as a viewing service request.\n    if (bubbleNode.data.thumbnailUrn) {// takes care of local bubbles\n      urlpath = rootNode.getDocument().getFullPath(bubbleNode.data.thumbnailUrn);\n    }\n\n    var endpointUrl = undefined;\n\n    if (!BUILD_FLAG__USE_OTG_DS_PROXY) {\n      var envName = getEnv();\n      endpointUrl = EnvironmentConfigurations[envName].UPSTREAM;\n      options.apiData = EnvironmentConfigurations[envName].UPSTREAM_API_DATA;\n    }\n\n    ViewingService.getThumbnail(initLoadContext({ endpoint: endpointUrl }), urlpath, onSuccess, onError, options);\n  });\n}\n\n/**\n   * \n   * @param {PDF} pdf PDF object from PDFLoader\n   * @param {integer} pageNumber start from 1\n   * @param {integer} width \n   * @param {integer} height \n   * @param {function} callback \n   *\n   * @private\n   */\nfunction renderForPDF(pdf, pageNumber, width, height, cacheKey, callback) {\n  var cache = LocalStorage.getItem(cacheKey);\n  if (cache) {\n    callback(cache);\n  } else {\n    pdf.getPage(pageNumber).then(function (page) {\n      var _document = getGlobal().document;\n      var canvas = _document.createElement(\"canvas\");\n      canvas.width = width;\n      canvas.height = height;\n\n      var context = canvas.getContext(\"2d\");\n\n      var options = {\n        scale: 1 };\n\n\n      var viewport = page.getViewport(options);\n      var scale = Math.min(canvas.width / viewport.width, canvas.height / viewport.height);\n\n      page.render({ canvasContext: context, viewport: page.getViewport({ scale: scale }) }).promise.then(function () {\n        page.cleanup();\n\n        canvas.toBlob(function (blob) {\n          var reader = new FileReader();\n          reader.readAsDataURL(blob);\n          reader.onloadend = function () {\n            LocalStorage.setItem(cacheKey, reader.result);\n            callback(reader.result);\n          };\n        }, \"image/png\");\n      });\n    });\n  }\n}\n\n\n/**\n   * Contains static functions for getting/generating from the viewer.\n   * @namespace Autodesk.Viewing.Thumbnails\n   */\nexport var Thumbnails = {\n  getUrlForBubbleNode: getUrlForBubbleNode };","// extracted by mini-css-extract-plugin","function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {try {var info = gen[key](arg);var value = info.value;} catch (error) {reject(error);return;}if (info.done) {resolve(value);} else {Promise.resolve(value).then(_next, _throw);}}function _asyncToGenerator(fn) {return function () {var self = this,args = arguments;return new Promise(function (resolve, reject) {var gen = fn.apply(self, args);function _next(value) {asyncGeneratorStep(gen, resolve, reject, _next, _throw, \"next\", value);}function _throw(err) {asyncGeneratorStep(gen, resolve, reject, _next, _throw, \"throw\", err);}_next(undefined);});};}\n\n// Viewer3D offers public methods for developers to use.\n// Viewer3DImpl is the implementation file for Viewer3D and is only used by Viewer3D.js\n// \n// Viewer3D does things like parameter validation.\n// Viewer3DImpl does the actual work, by interfacing with other internal components, such as the MaterialManager.\n\nimport * as THREE from \"three\";\nimport { isMobileDevice, isTouchDevice, isChrome, isIOSDevice, isPhoneFormFactor } from \"../compat\";\nimport { logger } from \"../logger/Logger\";\nimport { Profile } from \"./Profile\";\nimport { Prefs3D, Prefs2D, Prefs, VIEW_TYPES } from \"./PreferenceNames\";\nimport { Preferences } from \"./Preferences\";\nimport { EnumType } from \"./ProfileSettings\";\nimport { displayUnitsEnum, displayUnitsPrecisionEnum } from '../../src/measurement/DisplayUnits';\nimport { ProfileManager } from './ProfileManager';\nimport { getParameterByName } from \"../globals\";\nimport { errorCodeString, ErrorCodes } from \"../file-loaders/net/ErrorCodes\";\nimport { EventDispatcher } from \"./EventDispatcher\";\nimport { EventUtils } from \"./EventUtils\";\nimport { ScreenModeMixin, ScreenMode } from \"./ScreenModeDelegate\";\nimport { ExtensionMixin } from \"./ExtensionManager\";\nimport { HotkeyManager } from \"../tools/HotkeyManager\";\nimport { isNodeJS } from \"../compat\";\nimport { Navigation } from \"../tools/Navigation\";\nimport { ToolController } from \"../tools/ToolController\";\nimport { ViewingUtilities } from \"../tools/ViewingUtilities\";\nimport { DefaultHandler } from \"../tools/DefaultHandler\";\nimport { GestureHandler } from \"../tools/GestureHandler\";\nimport { i18n } from \"../globalization/i18next\";\nimport { endpoint, getEnv } from \"../file-loaders/net/endpoints\";\nimport * as et from \"./EventTypes\";\nimport { FileLoaderManager } from \"./FileLoaderManager\";\nimport { clearPropertyWorkerCache } from \"../file-loaders/main/PropDbLoader\";\nimport { theResourceLoader } from \"../resource-loader\";\nimport { ViewerState } from \"./ViewerState\";\nimport { LiveReviewClient } from \"../net/LiveReviewClient\";\nimport { OrbitDollyPanTool } from \"../tools/OrbitDollyPanTool\";\nimport { Autocam } from \"../tools/autocam/Autocam\";\nimport { Viewer3DImpl, InitParametersSetting } from \"./Viewer3DImpl\";\nimport { BubbleNode } from \"./bubble\";\nimport { Consolidation } from \"../wgs/scene/consolidation/Consolidation\";\nimport { KeyCode } from \"../tools/KeyCode\";\nimport { ForgeLogoSpinner } from './ForgeLogoSpinner';\nimport { LoadingSpinner } from './LoadingSpinner';\nimport { SceneMath } from \"../wgs/scene/SceneMath\";\nimport { ScreenShot } from \"./ScreenShot\";\nimport loaderExtensions from '../file-loaders/loader-extensions';\nimport { OverlayManager } from './OverlayManager';\nimport { GlobalManager } from './GlobalManager';\nimport { GlobalManagerMixin } from './GlobalManagerMixin';\nimport { LightPresets } from \"./LightPresets\";\nimport { ModelExploder } from \"../wgs/scene/ModelExploder\";\nimport { analytics } from '../analytics';\nimport { getLoadModelData } from '../analytics/analyticsData';\n\nvar av = Autodesk.Viewing;\n\n/**\n                            * LMV has two extra scene it renders along with the models. One is rendered before the models, and the\n                            * other is rendered after the models. These scenes are THREE.Scene objects and you can add custom meshes\n                            * to be rendered to either of the scenes.<br>\n                            *\n                            * The objects you add to these scenes will be drawn using the same multiple render targets that are used\n                            * when drawing the models. You may choose to either support multiple render targets or disable them.<br>\n                            * \n                            * To support multiple render targets you can only use Prism, MeshPhongMaterial, MeshBasicMateiral or\n                            * LineBasicMaterial materials, and you must add all the materials to LMV.<br>\n                            * \n                            * To disable multiple render targets you can set the ``skipIdTarget`` and ``skipDepthTarget`` properties to ``true``.\n                            * If you disable multiple render targets your objects will not have rollover highlighting and will not\n                            * contribute to ambient occlusion.\n                            *\n                            * @typedef {Object} Viewer3DExtraScene\n                            * @property {boolean} skipIdTarget - Set to true to prevent the id target from being rendered.\n                            * @property {boolean} skipDepthTarget - Set to true to prevent the ambient occlusion depth target from being rendered.\n                            */\n\n\n/**\n                                * Detects if WebGL is enabled.\n                                *\n                                * @return { number } -1 for not Supported,\n                                *                    0 for disabled\n                                *                    1 for enabled\n                                * \n                                * @private\n                                */\nfunction detectWebGL()\n{\n  // Check for the webgl rendering context\n  if (av.getGlobal().WebGLRenderingContext) {\n    var canvas = av.getGlobal().document.createElement(\"canvas\"),\n    names = [\"webgl\", \"experimental-webgl\", \"moz-webgl\", \"webkit-3d\"],\n    context = false;\n\n    for (var i = 0; i < 4; i++) {\n      try {\n        context = canvas.getContext(names[i]);\n        if (context && typeof context.getParameter === \"function\") {\n          // WebGL is enabled.\n          //\n          return 1;\n        }\n      } catch (e) {}\n    }\n\n    // WebGL is supported, but disabled.\n    //\n    return 0;\n  }\n\n  // WebGL not supported.\n  //\n  return -1;\n}\n\n\nvar nextViewerId = 0;\n\n// Order in which elements will appear - last node is the top most\nvar DefaultContainerLayersOrder = [\n'markups-svg',\n'pushpin-container'];\n\n\n\n/**\n                       * Base class for all viewer implementations.\n                       * It contains everything that is needed to connect to the Autodesk's Forge service and display 2D and 3D models.\n                       * It also includes basic navigation support, context menu and extension APIs.\n                       * \n                       * @constructor\n                       * \n                       * @param {HTMLElement} container - The viewer container.\n                       * @param {ViewerConfig} config - The initial settings object.\n                       * @param {boolean} [config.startOnInitialize=true] - Set this to false if you want to defer the run to a later time\n                       *  by calling run() explicitly.\n                       * @param {string} [config.theme='dark-theme'] - Set this to 'light-theme' if you want to use the light ui theme. Themes can\n                       *  be changed during execution by calling setTheme() and passing the theme's name.\n                       * @param {string} [config.localStoragePrefix] - The local storage prefix for viewer.\n                       * @param {Settings} [options.profileSettings] - settings object to override the default viewer settings: {@link Autodesk.Viewing.ProfileSettings.Default}.\n                       * @param {boolean} [options.useFileProfile] - if set to true one of the registered file profiles will be used to set the profile.\n                       * Otherwise, the viewer uses the default profile.\n                       * \n                       * @property {Autodesk.Viewing.Navigation} navigation - The navigation api object.\n                       * @property {Autodesk.Viewing.ToolController} toolController - The tool controller object.\n                       * @property {Autodesk.Viewing.ViewingUtilities} utilities - The viewing utilities object.\n                       * @property {Autodesk.Viewing.Model} model - Property that references the first loaded model.\n                       * @property {Autodesk.Viewing.OverlayManager} overlays - Add/Remove `THREE.Mesh` instances into overlay scenes.\n                       * \n                      * @alias Autodesk.Viewing.Viewer3D\n                       */\nexport function Viewer3D(container, config)\n{\n  this.setGlobalManager(new GlobalManager());\n\n  if (container) {\n    this.clientContainer = container;\n    this.container = this.getDocument().createElement(\"div\");\n    this.container.classList.add(\"adsk-viewing-viewer\");\n    this.container.style.height = \"100%\";\n    this.container.style.width = \"100%\";\n    this.container.style.overflow = \"hidden\";\n\n    this.container.classList.add(isTouchDevice() ? \"touch\" : \"notouch\");\n\n    this.clientContainer.appendChild(this.container);\n\n    this.config = config || {};\n    this.contextMenu = null;\n    this.contextMenuCallbacks = {};\n    this.started = false;\n\n    // Set the UI theme.\n    this.theme = this.config.theme || 'dark-theme';\n    this.container.classList.add(this.theme);\n\n    this.containerLayerOrder = this.config.containerLayerOrder || DefaultContainerLayersOrder;\n\n    if (isChrome()) {\n      this.container.classList.add('quality-text');\n    }\n\n    // Create the canvas if it doesn't already exist\n    if (this.container.nodeName === \"CANVAS\") {\n      throw 'Viewer must be initialized on a div [temporary]';\n    } else\n\n    {\n      this.canvasWrap = this.getDocument().createElement(\"div\");\n      this.canvasWrap.classList.add(\"canvas-wrap\");\n\n      this.canvas = this.getDocument().createElement(\"canvas\");\n      this.canvas.tabIndex = 0;\n      this.canvas.setAttribute('data-viewer-canvas', 'true');\n\n      this.canvasWrap.appendChild(this.canvas);\n      this.container.appendChild(this.canvasWrap);\n    }\n\n    // LMV-5628: Enable the Forge Logo in the bottom right of the canvas.\n    if (!isPhoneFormFactor() && !av.Private.DISABLE_FORGE_LOGO && !av.Private.DISABLE_FORGE_CANVAS_LOGO) {\n      var _document = this.getDocument();\n      this._forgeLogo = _document.createElement('div');\n      this._forgeLogo.classList.add('forge-logo-canvas');\n      var img = _document.createElement('img');\n      img.src = Autodesk.Viewing.Private.getResourceUrl('res/ui/forge-logo-canvas.png');\n      this._forgeLogo.appendChild(img);\n      this._forgeLogo.style.display = 'none';\n      this.container.appendChild(this._forgeLogo);\n    }\n\n    this.canvas.viewer = this; //store a pointer to the viewer in the canvas\n  }\n\n  var localStoragePrefix = config && config.localStoragePrefix || 'Autodesk.Viewing.Private.GuiViewer3D.SavedSettings.';\n  if (!localStoragePrefix.endsWith('.')) {\n    localStoragePrefix += '.';\n  }\n\n  var prefOptions = {\n    // Preferences. Prefix is a bit odd, but a legacy result after refactoring.\n    prefix: localStoragePrefix,\n    localStorage: !isNodeJS() };\n\n  this._displayEdges = null;\n  this._setDoubleSided = null;\n  this.prefs = new Preferences(this, prefOptions);\n\n  // Gets assigned by the setProfile method.\n  this.profile = null;\n  this.profileManager = new ProfileManager();\n\n  // Add a reference to the hotkey manager as an instance variable\n  this._hotkeyManager = new HotkeyManager();\n\n  this.extensionCache = null; // Supports Extension.getCache() feature.\n  this.running = false;\n  this._pushedTool = '';\n  this._defaultNavigationTool = '';\n  this.id = nextViewerId++;\n  this.impl = new Viewer3DImpl(this.canvas, this);\n  this.overlays = new OverlayManager(this.impl);\n  this._loadingSpinner = av.Private.DISABLE_FORGE_LOGO ? new LoadingSpinner() : new ForgeLogoSpinner(this);\n  this._loadingSpinner.setGlobalManager(this.globalManager);\n\n  //ADP\n  this.trackADPTimer = [];\n};\n\nEventDispatcher.prototype.apply(Viewer3D.prototype);\nScreenModeMixin.prototype.apply(Viewer3D.prototype);\nExtensionMixin.prototype.apply(Viewer3D.prototype);\nGlobalManagerMixin.call(Viewer3D.prototype);\n\nViewer3D.prototype.constructor = Viewer3D;\n\nObject.defineProperty(Viewer3D.prototype, 'model', {\n  get: function get() {var _this$impl;return (_this$impl = this.impl) === null || _this$impl === void 0 ? void 0 : _this$impl.model;},\n  set: function set() {throw \"Do not set viewer.model\";} });\n\n\n/**\n                                                              * Need to keep track of viewers in document so we know when it is safe\n                                                              * to call clearPropertyWorkerCache()\n                                                              *\n                                                              * @static\n                                                              * @alias Autodesk.Viewing.Viewer3D#ViewerCount\n                                                              */\nViewer3D.ViewerCount = 0;\n\n/**\n                           * Default values passed into {@link #setCanvasClickBehavior} specifying how the viewer canvas \n                           * will react to user input as well as other 3d-canvas related options.\n                           *\n                           * @static\n                           * @alias Autodesk.Viewing.Viewer3D#kDefaultCanvasConfig\n                           */\nViewer3D.kDefaultCanvasConfig = {\n  \"click\": {\n    \"onObject\": [\"selectOnly\"],\n    \"offObject\": [\"deselectAll\"] },\n\n  \"clickAlt\": {\n    \"onObject\": [\"setCOI\"],\n    \"offObject\": [\"setCOI\"] },\n\n  \"clickCtrl\": {\n    \"onObject\": [\"selectToggle\"]\n    // don't deselect if user has control key down https://jira.autodesk.com/browse/LMV-1852\n    //\"offObject\": [\"deselectAll\"]\n  },\n  \"clickShift\": {\n    \"onObject\": [\"selectToggle\"]\n    // don't deselect if user has shift key down https://jira.autodesk.com/browse/LMV-1852\n    //\"offObject\": [\"deselectAll\"]\n  },\n\n  // Features that support disabling\n  \"disableSpinner\": false,\n  \"disableMouseWheel\": false,\n  \"disableTwoFingerSwipe\": false };\n\n\n/**\n                                     * The extra scene that gets rendered after the background and before any models are rendered. See {@link Viewer3DExtraScene}\n                                     * @member scene\n                                     * @memberOf Autodesk.Viewing.Viewer3D\n                                     * @alias Autodesk.Viewing.Viewer3D#scene\n                                     */\nObject.defineProperty(Viewer3D.prototype, 'scene', {\n  get: function get() {return this.impl.scene;},\n  set: function set() {throw \"Do not set viewer.scene\";} });\n\n\n/**\n                                                              * The extra scene that gets rendered after all models are rendered. See {@link Viewer3DExtraScene}\n                                                              * @member sceneAfter\n                                                              * @memberOf Autodesk.Viewing.Viewer3D\n                                                              * @alias Autodesk.Viewing.Viewer3D#sceneAfter\n                                                              */\nObject.defineProperty(Viewer3D.prototype, 'sceneAfter', {\n  get: function get() {return this.impl.sceneAfter;},\n  set: function set() {throw \"Do not set viewer.sceneAfter\";} });\n\n\n/**\n                                                                   * @private\n                                                                   */\nViewer3D.createHeadlessViewer = function () {\n  var viewer = new Viewer3D();\n  viewer.impl.initialize();\n  viewer.impl.setLightPreset(0);\n  return viewer;\n};\n\n/**\n    * @callback Autodesk.Viewing.Viewer3D~onLoadModelSuccess\n    * @param {Autodesk.Viewing.Model} model - Reference to the loaded model.\n    */\n\n/**\n        * @callback Autodesk.Viewing.Viewer3D~onLoadModelFailure\n        * @param {Number} errorCode - error number\n        * @param {string} errorMessage - error message\n        */\n\n/**\n            * Initializes the viewer and loads any extensions specified in the constructor's\n            * config parameter. If the optional parameters are specified, the start() function will\n            * use an optimized initialization sequence that results in faster model load.\n            * The parameters are the same as the ones for Viewer3D.loadModel and you do not need to call loadModel\n            * subsequently if the model is loaded via the call to start().\n            *\n            * @param {string} [url] - Optional URN or filepath to load on start.\n            * @param {object} [options] - Optional path to shared property database.\n            * @param {Autodesk.Viewing.Viewer3D~onLoadModelSuccess} [onSuccessCallback] - Method that gets called when initial loading is done\n            * and streaming starts.\n            * @param {Autodesk.Viewing.Viewer3D~onLoadModelFailure} [onErrorCallback] - Method that gets called when initial loading ends with an error.\n            * @param {object} [initOptions] - Optional: Options forwarded to viewer.initialize()\n            * @returns {number} 0 if the viewer has started, an error code (same as that returned by initialize()) otherwise.\n            * \n            * @alias Autodesk.Viewing.Viewer3D#start\n            */\nViewer3D.prototype.start = function (url, options, onSuccessCallback, onErrorCallback, initOptions) {\n  if (this.started) {\n    return 0;\n  }\n  this.started = true;\n\n  var viewer = this;\n\n  // Initialize the renderer and related stuff\n  var result = viewer.initialize(initOptions);\n  if (result !== 0) {\n    if (onErrorCallback) {\n      setTimeout(function () {onErrorCallback(result);}, 1);\n    }\n    return result;\n  }\n\n  //load extensions and set navigation overrides, etc.\n  //Delayed so that it runs a frame after the long initialize() call.\n  setTimeout(function () {viewer.setUp(viewer.config);}, 1);\n\n  //If a model URL was given, kick off loading first, then initialize, otherwise just continue\n  //with initialization immediately.\n  if (url)\n  this.loadModel(url, options, onSuccessCallback, onErrorCallback);\n\n  return 0;\n};\n\n\n/**\n    * Initializes the viewer and loads any extensions specified in the constructor's\n    * config parameter. If the optional parameters are specified, the start() function will\n    * use an optimized initialization sequence that results in faster model load.\n    * The parameters are the same as the ones for Viewer3D.loadModel and you do not need to call loadModel\n    * subsequently if the model is loaded via the call to start().\n    * \n    * @param {Document} avDocument - The Document instance holding the current derivative manifest\n    * @param {BubbleNode} [manifestNode] - The manifest node to load model for.\n    * @param {Object} [options] - Extra initialization options to override the defaults. Normally not needed.\n    * @returns {Promise} - Resolves on success, rejects on any kind of initialization failure.\n    * \n    */\nViewer3D.prototype.startWithDocumentNode = function (avDocument, manifestNode, options) {\n\n  var viewer = this;\n\n  return new Promise(function (resolve, reject) {\n\n    if (viewer.started) {\n      return 0;\n    }\n    viewer.started = true;\n\n    // Initialize the renderer and related stuff\n    var result = viewer.initialize();\n    if (result !== 0) {\n      setTimeout(function () {reject(result);}, 1);\n      return;\n    }\n\n    //load extensions and set navigation overrides, etc.\n    //Delayed so that it runs a frame after the long initialize() call.\n    setTimeout(function () {viewer.setUp(viewer.config);}, 1);\n\n    //If a model URL was given, kick off loading first, then initialize, otherwise just continue\n    //with initialization immediately.\n    var prom = viewer.loadDocumentNode(avDocument, manifestNode, options);\n    prom.then(resolve).catch(reject);\n  });\n};\n\n\nViewer3D.prototype.registerUniversalHotkeys = function ()\n{\n  var self = this;\n\n  var onPress;\n  var onRelease;\n  var previousTool;\n\n  /*\n                    // useful for debugging, when you want to force a redraw, hit \"u\"\n                    // search on \"\"Autodesk.ForceUpdate\" below and uncomment that popHotkeys line, too.\n                    // Add force update hotkey\n                    onPress = function() {\n                        // _spectorDump: the fourth \"true\" gets Spector to dump, if uncommented in Viewer3DImpl.js\n                        self.impl.invalidate(true,true,true,true);\n                        return true;\n                    };\n                    this._hotkeyManager.pushHotkeys(\"Autodesk.ForceUpdate\", [\n                        {\n                            keycodes: [KeyCode.u],\n                            onPress: onPress\n                        }\n                    ]);\n                    */\n\n\n  // Add Fit to view hotkey\n  onPress = function onPress() {\n    self.navigation.setRequestFitToView(true);\n    analytics.track('viewer.fit_to_view', {\n      from: 'Keyboard' });\n\n    return true;\n  };\n  self._hotkeyManager.pushHotkeys(\"Autodesk.FitToView\", [\n  {\n    keycodes: [KeyCode.f],\n    onPress: onPress }]);\n\n\n\n  // Add home hotkey\n  onPress = function onPress() {\n    self.navigation.setRequestHomeView(true);\n    return true;\n  };\n  self._hotkeyManager.pushHotkeys(\"Autodesk.Home\", [\n  {\n    keycodes: [KeyCode.h],\n    onPress: onPress },\n\n  {\n    keycodes: [KeyCode.HOME],\n    onPress: onPress }]);\n\n\n\n  // Escape\n  onRelease = function onRelease() {\n    // handle internal GUI components before firing the event to the client\n    if (self.objectContextMenu && self.objectContextMenu.hide()) {\n      return true;\n    }\n\n    // TODO: Could this all be unified somehow? If event listeners had priorities,\n    //       we could intersperse listeners from the client and the viewer, which\n    //       I think will eventually be required.\n\n    self.dispatchEvent({ type: et.ESCAPE_EVENT });\n    return true;\n  };\n\n  self._hotkeyManager.pushHotkeys(\"Autodesk.Escape\", [\n  {\n    keycodes: [KeyCode.ESCAPE],\n    onRelease: onRelease }]);\n\n\n\n  // Pan\n  onPress = function onPress() {\n    previousTool = self.getActiveNavigationTool();\n    return self.setActiveNavigationTool(\"pan\");\n  };\n  onRelease = function onRelease() {\n    return self.setActiveNavigationTool(previousTool);\n  };\n  var hotkeys = [\n  {\n    keycodes: [KeyCode.SHIFT],\n    onPress: onPress,\n    onRelease: onRelease },\n\n  {\n    keycodes: [KeyCode.SPACE],\n    onPress: onPress,\n    onRelease: onRelease }];\n\n  self._hotkeyManager.pushHotkeys(\"Autodesk.Pan\", hotkeys, { tryUntilSuccess: true });\n};\n\nViewer3D.prototype.createControls = function () {var _this = this;\n  var self = this;\n  var impl = self.impl;\n\n  self.navigation = new Navigation(impl.camera);\n  self.__initAutoCam(impl);\n\n  self.utilities = new ViewingUtilities(impl, self.autocam, self.navigation);\n  self.clickHandler = new DefaultHandler(impl, self.navigation, self.utilities);\n  self.toolController = new ToolController(impl, self, self.autocam, self.utilities, self.clickHandler);\n  self.toolController.registerTool(new GestureHandler(self));\n\n  self.toolController.registerTool(self._hotkeyManager);\n  self.toolController.activateTool(self._hotkeyManager.getName());\n\n  self.registerUniversalHotkeys();\n\n  self.toolController.registerTool(new OrbitDollyPanTool(impl, self, this.config.navToolsConfig), function (enable, name) {\n    if (!enable) {\n      _this.setActiveNavigationTool();\n    }\n  });\n\n  // Set the tool Modality Map\n  self.toolController.setModalityMap({\n    section: { explode: false, pan: false, dolly: false },\n    explode: { section: false, pan: false, dolly: false },\n    measure: {},\n    calibration: {},\n    orbit: {},\n    dolly: {},\n    pan: {},\n    fov: {},\n    bimwalk: {} });\n\n\n  return self.toolController;\n};\n\n/**\n    * Create any DOM and canvas elements, and setup WebGL.\n    *\n    * @param {object} [initOptions] - optional initialization options, such as renderer, glrenderer & materialManager.\n    * \n    * @returns {number} 0 if initialization was successful, {@link Autodesk.Viewing.ErrorCode} otherwise.\n    * @private\n    */\nViewer3D.prototype.initialize = function (initOptions)\n{\n\n  //Set up the private viewer implementation\n  this.setScreenModeDelegate(this.config ? this.config.screenModeDelegate : undefined);\n\n  var dimensions = this.getDimensions();\n  this.canvas.width = dimensions.width;\n  this.canvas.height = dimensions.height;\n\n  // For Safari and WKWebView and UIWebView on ios device with retina display,\n  // needs to manually rescale our canvas to get the right scaling. viewport metatag\n  // alone would not work.\n  if (isIOSDevice() && this.getWindow().devicePixelRatio) {\n    this.canvas.width /= this.getWindow().devicePixelRatio;\n    this.canvas.height /= this.getWindow().devicePixelRatio;\n  }\n\n  //Call this after setting canvas size above...\n  this.impl.initialize(initOptions);\n\n  //Only run the WebGL failure logic if the renderer failed to initialize (otherwise\n  //we don't have to spend time creating a GL context here, since we know it worked already\n  if (!this.impl.glrenderer()) {\n    var webGL = detectWebGL();\n    if (webGL <= 0) {// WebGL error.\n      return webGL === -1 ? ErrorCodes.BROWSER_WEBGL_NOT_SUPPORTED : ErrorCodes.BROWSER_WEBGL_DISABLED;\n    }\n  }\n\n  var self = this;\n\n  // Add a callback for the panels to resize when the viewer resizes.\n  // For some reason, Safari iOS updates the DOM dimensions *after* the resize event,\n  // so in that case we handle the resizing asynchronously.\n  if (isIOSDevice()) {\n    var _resizeTimer;\n    this.onResizeCallback = function (e) {\n      clearTimeout(_resizeTimer);\n      _resizeTimer = setTimeout(self.resize.bind(self), 500);\n    };\n  } else {\n    this.onResizeCallback = function (e) {\n      var oldWidth = self.impl.camera.clientWidth;\n      var oldHeight = self.impl.camera.clientHeight;\n      var newWidth = self.container.clientWidth;\n      var newHeight = self.container.clientHeight;\n\n      if (oldWidth !== newWidth ||\n      oldHeight !== newHeight) {\n        self.resize();\n      }\n    };\n  }\n  this.addWindowEventListener('resize', this.onResizeCallback, false);\n\n  this.onScrollCallback = function (e) {\n    self.impl.canvasBoundingclientRectDirty = true;\n  };\n  this.addWindowEventListener('scroll', this.onScrollCallback);\n\n  this.initContextMenu();\n\n  // Localize the viewer.\n  this.localize();\n\n\n  this.impl.controls = this.createControls();\n\n  // Initialize the preference callbacks\n  this.initializePrefListeners();\n\n  this.setDefaultNavigationTool(\"orbit\");\n\n  if (this.impl.controls)\n  this.impl.controls.setAutocam(this.autocam);\n\n  var canvasConfig = this.config && this.config.canvasConfig ? this.config.canvasConfig : Viewer3D.kDefaultCanvasConfig;\n  this.setCanvasClickBehavior(canvasConfig);\n\n\n  // Allow clients not load the spinner. This is needed for embedding viewer in a WebView on mobile,\n  // where the spinner makes the UI looks less 'native'.\n  if (!canvasConfig.disableSpinner) {\n\n    // Create a div containing an image: this will be a\n    // spinner (aka activity indicator) that tells the user\n    // that the file is loading.\n    //\n    // Keep reference for backwards compatibility.\n    this.loadSpinner = this._loadingSpinner.createDom(this.container);\n  }\n\n  // Auxiliary class to get / restore the viewer state.\n  this.viewerState = new ViewerState(this);\n\n  // The default behavior is to run the main loop immediately, unless startOnInitialize\n  // is provided and is false.\n  //\n  if (!this.config || !this.config.hasOwnProperty(\"startOnInitialize\") || this.config.startOnInitialize)\n  {\n    this.run();\n  }\n\n  this.getWindow().NOP_VIEWER = this;\n\n  this.addEventListener(et.MODEL_ADDED_EVENT, function (e) {\n    self.onModelAdded(e.model, e.preserveTools);\n  });\n\n  this.addEventListener(et.GEOMETRY_LOADED_EVENT, function (e) {\n    if (e.model.is2d() && !e.model.isLeaflet()) {var _e$model$loader, _e$model$loader$svf;\n      self.navigation.setMinimumLineWidth((_e$model$loader = e.model.loader) === null || _e$model$loader === void 0 ? void 0 : (_e$model$loader$svf = _e$model$loader.svf) === null || _e$model$loader$svf === void 0 ? void 0 : _e$model$loader$svf.minLineWidth);\n    }\n  });\n\n  this.dispatchEvent(et.VIEWER_INITIALIZED);\n\n  this.trackADPSettingsOptions();\n  this.trackADPExtensionsLoaded();\n\n  Viewer3D.ViewerCount++;\n\n  // These calls are useful for Internet Explorer's use of spector.\n  // Uncomment this code, and add the https://spectorcdn.babylonjs.com/spector.bundle.js script\n  // in index.html, and Spector's menu shows up in the application itself.\n  /*\n  var spector = new SPECTOR.Spector();\n  window.spector = spector;\n  spector.displayUI();    // comment this line out if you instead want to use _spectorDump and the \"u\" key\n  spector.spyCanvases();\n  */\n\n  return 0; // No Error initializing.\n};\n\n/**\n    * Loading extensions and initializing canvas interactions.\n    * Invoked automatically by {@link Autodesk.Viewing.Viewer3D#start} method.\n    * \n    * @param {object} [config] - configuration values \n    * @param {string[]} [config.extensions] - List of extension ids to load with the model.\n    * @param {object} [config.canvasConfig] - Overrides for click/tap events on the 3D canvas. Refer to {@link #setCanvasClickBehavior} for details.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setUp\n    */\nViewer3D.prototype.setUp = function (config) {\n\n  this.config = config || {};\n\n  // Load the extensions specified in the config.\n  //\n  if (Array.isArray(this.config.extensions)) {\n    var extensions = this.config.extensions;\n    for (var i = 0; i < extensions.length; ++i) {\n      this.loadExtension(extensions[i], this.config);\n    }\n  }\n\n  //load debug ext by query param\n  var debugConfig = getParameterByName(\"lmv_viewer_debug\");\n  if (debugConfig === \"true\") {\n    this.loadExtension(\"Autodesk.Debug\", this.config);\n  }\n\n  var canvasConfig = this.config.canvasConfig || Viewer3D.kDefaultCanvasConfig;\n  this.setCanvasClickBehavior(canvasConfig);\n\n  this._onAggregatedSelectionChanged = this._onAggregatedSelectionChanged.bind(this);\n  this.addEventListener(et.AGGREGATE_SELECTION_CHANGED_EVENT, this._onAggregatedSelectionChanged);\n};\n\n/**\n    * Unloads extensions and the model loaded.\n    * Invoked automatically by {@link Autodesk.Viewing.Viewer3D#finish} method.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#tearDown\n    */\nViewer3D.prototype.tearDown = function () {\n  this.clearSelection();\n\n  this.removeEventListener(et.AGGREGATE_SELECTION_CHANGED_EVENT, this._onAggregatedSelectionChanged);\n\n  if (this.loadedExtensions) {\n    for (var extensionId in this.loadedExtensions) {\n      try {\n        // Extensions that fail to unload will end up terminating\n        // the viewer tearDown process.  Thus we protect from it\n        // here and log it (if available).\n        this.unloadExtension(extensionId);\n      } catch (err) {\n        logger.error(\"Failed to unload extension: \" + extensionId, err, errorCodeString(ErrorCodes.VIEWER_INTERNAL_ERROR));\n        logger.track(\n        {\n          category: \"error_unload_extension\",\n          extensionId: extensionId,\n          error_message: err.message,\n          call_stack: err.stack });\n\n      }\n    }\n    this.loadedExtensions = null;\n  }\n\n  // Deactivate mouse events and touch gestures. If a new model will be loaded, it will be enabled again (activateDefaultNavigationTools).\n  if (this.toolController) {\n    this.toolController.enableMouseButtons(false);\n    this.toolController.deactivateTool(\"gestures\");\n  }\n\n  logger.reportRuntimeStats(true);\n\n  this._loadingSpinner.show();\n\n  if (this.liveReviewClient) {\n    this.liveReviewClient.destroy();\n    this.liveReviewClient = null;\n  }\n\n  //Stop ADP tracking\n  while (this.trackADPTimer.length > 0) {\n    clearTimeout(this.trackADPTimer.pop());\n  }\n\n  this.impl.unloadCurrentModel();\n  this.impl.setCutPlaneSet('__set_view', undefined);\n};\n\n/**\n    * When selection has changed set the pivot point to be in the middle, if SELECTION_SETS_PIVOT is true\n    * \n    * @alias Autodesk.Viewing.Viewer3D#_onAggregatedSelectionChanged\n    */\nViewer3D.prototype._onAggregatedSelectionChanged = function ()\n{\n  if (this.navigation.getSelectionSetsPivot()) {\n    var selection = this.impl.selector.getAggregateSelection();\n    if (selection.length) {\n      var selectionBounds = this.impl.get3DBounds(selection);\n      this.utilities.setPivotPoint(selectionBounds.center(), true, true);\n      this.utilities.pivotActive(this.navigation.getPivotSetFlag(), true);\n    }\n  }\n};\n\n/**\n    * Triggers the Viewer's render loop.\n    * Invoked automatically by {@link Autodesk.Viewing.Viewer3D#start} method.\n    * Refer to {@link ViewerConfig|ViewerConfig.startOnInitialize} to change start's method behavior.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#run\n    */\nViewer3D.prototype.run = function ()\n{\n  if (!this.running) {\n    this.resize();\n    this.running = true;\n    this.impl.run();\n  }\n};\n\n\n/**\n    * Localize the viewer. This method can be overwritten so that the subclasses\n    * can localize any additional elements. Invoked internally during initialization.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#localize\n    */\nViewer3D.prototype.localize = function ()\n{\n  i18n.localize();\n};\n\nViewer3D.prototype.__initAutoCam = function (impl)\n{\n  var self = this;\n\n  var ourCamera = impl.camera;\n\n  if (!ourCamera.pivot)\n  ourCamera.pivot = new THREE.Vector3(0, 0, 0);\n\n  if (!ourCamera.target)\n  ourCamera.target = new THREE.Vector3(0, 0, 0);\n\n  if (!ourCamera.worldup)\n  ourCamera.worldup = ourCamera.up.clone();\n\n  function autocamChange(upChanged)\n  {\n    if (self.autocamCamera.isPerspective !== ourCamera.isPerspective)\n    {\n      if (self.autocamCamera.isPerspective)\n      self.navigation.toPerspective();else\n\n      self.navigation.toOrthographic();\n    }\n    self.navigation.setVerticalFov(self.autocamCamera.fov, false);\n    self.navigation.setView(self.autocamCamera.position, self.autocamCamera.target);\n    self.navigation.setPivotPoint(self.autocamCamera.pivot);\n    self.navigation.setCameraUpVector(self.autocamCamera.up);\n    if (upChanged)\n    self.navigation.setWorldUpVector(self.autocamCamera.worldup);\n\n    self.impl.syncCamera(upChanged);\n  }\n\n  function pivotDisplay(state)\n  {\n    if (self.utilities)\n    self.utilities.pivotActive(state, false);else\n\n    self.impl.controls.pivotActive(state, false);\n  }\n\n  function onTransitionCompleted() {\n    self.fireEvent({ type: et.CAMERA_TRANSITION_COMPLETED });\n  }\n\n  self.autocamCamera = ourCamera.clone();\n  self.autocamCamera.target = ourCamera.target.clone();\n  self.autocamCamera.pivot = ourCamera.pivot.clone();\n  self.autocamCamera.worldup = ourCamera.worldup.clone();\n\n  self.autocam = new Autocam(self.autocamCamera, self.navigation, self.canvas);\n  self.autocam.setGlobalManager(this.globalManager);\n  self.autocam.registerCallbackCameraChanged(autocamChange);\n  self.autocam.registerCallbackPivotDisplay(pivotDisplay);\n  self.autocam.registerCallbackTransitionCompleted(onTransitionCompleted);\n\n  self.addEventListener(\"cameraChanged\", function (evt)\n  {\n    var ourCamera = evt.camera;\n    self.autocam.sync(ourCamera);\n  });\n\n  self.autocam.sync(ourCamera);\n};\n\n\n/**\n    * Removes all created DOM elements and performs any GL uninitialization that is needed.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#uninitialize\n    */\nViewer3D.prototype.uninitialize = function ()\n{\n\n  this.removeWindowEventListener('resize', this.onResizeCallback, false);\n  this.onResizeCallback = null;\n\n  this.removeWindowEventListener('scroll', this.onScrollCallback);\n  this.onScrollCallback = null;\n\n  if (this.canvas) {\n    this.canvas.removeEventListener('mousedown', this.onMouseDown);\n  } else if (this.container) {\n    this.container.removeEventListener('mousedown', this.onMouseDown);\n  }\n  this.onMouseDown = null;\n\n  if (this.canvas) {\n    this.canvas.removeEventListener('mouseup', this.onMouseUp);\n  } else if (this.container) {\n    this.container.removeEventListener('mouseup', this.onMouseUp);\n  }\n  this.onMouseUp = null;\n\n  this.canvas.parentNode.removeChild(this.canvas);\n  this.canvas.viewer = null;\n\n  // Detach canvas\n  if (InitParametersSetting.canvas === this.canvas) {\n    InitParametersSetting.canvas = null;\n  }\n  this.canvas = null;\n\n  this.canvasWrap = null;\n\n  this.viewerState = null;\n\n  logger.reportRuntimeStats();\n  logger.track({ category: \"viewer_destroy\" }, true);\n\n  if (this.toolController) {\n    this.toolController.uninitialize();\n    this.toolController = null;\n    this.clickHandler = null;\n    this.utilities = null;\n  }\n\n  if (this.navigation) {\n    this.navigation.uninitialize();\n    this.navigation = null;\n  }\n\n  if (this.impl) {\n    this.impl.dtor();\n    this.impl = null;\n  }\n\n  if (this.overlays) {\n    this.overlays.dtor();\n    this.overlays = null;\n  }\n\n  this.loadSpinner = null;\n  this._loadingSpinner.destroy();\n\n  this.prefs && this.prefs.clearListeners();\n  this.prefs = null;\n  this.profile = null;\n  this.profileManager = null;\n\n  this.autocam.dtor();\n  this.autocam = null;\n  this.autocamCamera = null;\n\n  //this._hotkeyManager.popHotkeys(\"Autodesk.ForceUpdate\");\n  this._hotkeyManager.popHotkeys(\"Autodesk.FitToView\");\n  this._hotkeyManager.popHotkeys(\"Autodesk.Home\");\n  this._hotkeyManager.popHotkeys(\"Autodesk.Escape\");\n  this._hotkeyManager.popHotkeys(\"Autodesk.Pan\");\n  this._hotkeyManager.popHotkeys(\"Autodesk.Orbit\");\n\n  Viewer3D.ViewerCount--;\n  if (Viewer3D.ViewerCount === 0) {\n    clearPropertyWorkerCache();\n  }\n\n  if (this.onDefaultContextMenu) {\n    this.container.removeEventListener('contextmenu', this.onDefaultContextMenu, false);\n    this.onDefaultContextMenu = null;\n  }\n\n  if (this.screenModeDelegate) {\n    this.screenModeDelegate.uninitialize();\n    this.screenModeDelegate = null;\n  }\n\n  if (this._displayEdges) {\n    this.removeEventListener(et.GEOMETRY_LOADED_EVENT, this._displayEdges);\n    this._displayEdges = null;\n  }\n\n  if (this._setDoubleSided) {\n    this.removeEventListener(et.MODEL_ADDED_EVENT, this._setDoubleSided);\n    this._setDoubleSided = null;\n  }\n\n  this.extensionCache = null;\n  this.clientContainer = null;\n  this.config = null;\n  this.contextMenu = null;\n  this.contextMenuCallbacks = null;\n\n  if (this.container && this.container.parentNode)\n  this.container.parentNode.removeChild(this.container);\n  this.container = null;\n  this._forgeLogo = null;\n\n  this.dispatchEvent(et.VIEWER_UNINITIALIZED);\n\n  //forget all event listeners\n  this.listeners = {};\n\n  if (av.getGlobal().NOP_VIEWER === this) {\n    av.getGlobal().NOP_VIEWER = null;\n  }\n\n  logger.log(\"viewer destroy\");\n};\n\n\n/**\n    * Unloads any loaded extensions and then uninitializes the viewer.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#finish\n    */\nViewer3D.prototype.finish = function () {\n  this.tearDown();\n  this.uninitialize();\n};\n\n\nViewer3D.prototype.setLoadHeuristics = function (options) {\n\n  //Check for source file extension -- Revit and Navisworks are AEC/BIM models\n  var bubbleNode = options.bubbleNode;\n  if (bubbleNode) {\n    var viewable = bubbleNode.findViewableParent();\n    if (viewable) {\n      var fileName = viewable.name();\n      options.fileExt = fileName.slice(fileName.length - 3).toLowerCase();\n      var AECextensions = ['rvt', 'nwd', 'nwc', 'ifc'];\n      if (typeof options.isAEC === \"undefined\" && AECextensions.indexOf(options.fileExt) !== -1) {\n        options.isAEC = true;\n      }\n    }\n  }\n\n\n  if (options.isAEC) {\n\n    if (typeof options.useConsolidation === \"undefined\") {\n      //If it's an AEC model, use mesh consolidation unless explicitly turned off\n      var cparam = getParameterByName(\"useConsolidation\") || \"\";\n      options.useConsolidation = cparam === \"true\" ? true : cparam === \"false\" ? false : undefined;\n    }\n    if (typeof options.useConsolidation === \"undefined\") {\n      options.useConsolidation = !isMobileDevice() && !isNodeJS(); //Consolidation requires a renderer, hence skip on node.js\n    }\n    if (typeof options.createWireframe === \"undefined\") {\n      options.createWireframe = !isMobileDevice();\n    }\n\n    if (typeof options.disablePrecomputedNodeBoxes === \"undefined\") {\n      options.disablePrecomputedNodeBoxes = true;\n    }\n  } else {\n\n    if (typeof options.createWireframe === \"undefined\") {\n      options.createWireframe = !isMobileDevice() && this.prefs.edgeRendering;\n    }\n  }\n\n  // When using consolidation, a too fine-grained bvh would eliminate the performance gain.\n  // To avoid that, we use larger default settings when activating consolidation.\n  //\n  // Doing this for consolidation only is done to minimize the scope of potential side effects whenever consolidation is not used.\n  // It might generally be useful to increase these values, but this requires more investigation of potential performance impact first.\n  if (options.useConsolidation && !options.bvhOptions) {\n    options.bvhOptions = {};\n    Consolidation.applyBVHDefaults(options.bvhOptions);\n  }\n\n};\n\n/**\n    * ADP\n    */\nViewer3D.prototype.trackADPSettingsOptions = function () {\n  var self = this;\n  this.trackADPTimer.push(setTimeout(function () {\n    if (self.prefs) {\n      var settingOptionsStatus = {\n        category: \"settingOptionsStatus\",\n        switchSheetColorWhiteToBlack: self.prefs.swapBlackAndWhite,\n        leftHandedMouseSetup: self.prefs.leftHandedMouseSetup,\n        openPropertiesOnSelect: self.prefs.openPropertiesOnSelect,\n        orbitPastWorldPoles: self.prefs.orbitPastWorldPoles,\n        reverseMouseZoomDirection: self.prefs.reverseMouseZoomDir,\n        fusionStyleOrbit: self.prefs.fusionOrbit,\n        setPivotWithLeftMouseButton: self.prefs.clickToSetCOI,\n        zoomTowardPivot: self.prefs.zoomTowardsPivot,\n        viewCubeActsOnPivot: self.prefs.alwaysUsePivot,\n        showViewCube: self.prefs.viewCube,\n        environmentImageVisible: self.prefs.envMapBackground,\n        displayEdges: self.prefs.edgeRendering,\n        displayPoints: self.prefs.pointRendering,\n        displayLines: self.prefs.lineRendering,\n        ghostHiddenObjects: self.prefs.ghosting,\n        groundReflection: self.prefs.groundReflection,\n        groundShadow: self.prefs.groundShadow,\n        ambientShadows: self.prefs.ambientShadows,\n        antiAliasing: self.prefs.antialiasing,\n        progressiveModelDisplay: self.prefs.progressiveRendering,\n        smoothNavigation: self.prefs.optimizeNavigation };\n\n      logger.track(settingOptionsStatus);\n    }\n  }, 30000));\n\n};\n\n\nViewer3D.prototype.trackADPExtensionsLoaded = function () {\n  var self = this;\n  var extensionList = {};\n  extensionList.category = \"loaded_extensions\";\n  this.trackADPTimer.push(setTimeout(function () {\n    if (self.loadedExtensions) {\n      for (var extensionId in self.loadedExtensions) {\n        extensionList[extensionId] = extensionId;\n      }\n    }\n    logger.track(extensionList);\n  }, 30000));\n};\n\nViewer3D.prototype.activateDefaultNavigationTools = function (is2d) {\n  if (isNodeJS())\n  return;\n  var defaultNavTool = is2d ? \"pan\" : \"orbit\";\n  // Sets the default tool\n  this.setDefaultNavigationTool(defaultNavTool);\n  // Then activate the tool\n  this.setActiveNavigationTool(defaultNavTool);\n\n  if (this.toolController) {\n    this.toolController.enableMouseButtons(true);\n    this.toolController.activateTool(\"gestures\");\n  }\n};\n\nViewer3D.prototype.registerDimensionSpecificHotkeys = function (is2d) {\n  if (!this._hotkeyManager)\n  return;\n\n  if (is2d) {\n    // Remove 3D specific hotkeys\n    this._hotkeyManager.popHotkeys(\"Autodesk.Orbit\");\n  } else {\n\n    var self = this;\n\n    // Add 3D specific hotkeys\n    // Orbit\n    var previousTool;\n    var onPress = function onPress() {\n      previousTool = self.getActiveNavigationTool();\n      return self.setActiveNavigationTool(\"orbit\");\n    };\n    var onRelease = function onRelease() {\n      return self.setActiveNavigationTool(previousTool);\n    };\n    var hotkeys = [\n    {\n      keycodes: [KeyCode.ALT],\n      onPress: onPress,\n      onRelease: onRelease }];\n\n    this._hotkeyManager.pushHotkeys(\"Autodesk.Orbit\", hotkeys, { tryUntilSuccess: true });\n  }\n};\n\nViewer3D.prototype.onModelAdded = function (model, preserveTools) {\n\n  if (model.is2d() && !model.isLeaflet()) {var _model$loader, _model$loader$svf;\n    this.navigation.setMinimumLineWidth((_model$loader = model.loader) === null || _model$loader === void 0 ? void 0 : (_model$loader$svf = _model$loader.svf) === null || _model$loader$svf === void 0 ? void 0 : _model$loader$svf.minLineWidth);\n  }\n\n  var models = this.impl.modelQueue().getModels();\n  var isFirstModel = models.length === 1;\n\n  if (isFirstModel) {\n    this.initializeFirstModelPresets(model, preserveTools);\n  }\n};\n\nViewer3D.prototype.initializeFirstModelPresets = function (model, preserveTools, preserveView) {\n  if (model.is2d()) {\n    this.activateLayerState(\"Initial\");\n  }\n\n  //OK, pay attention here:\n  //The code here is a mess in order to make \"freeorbit\" as default navigation\n  //unit test load the initial view correctly.\n  //First, we call setActiveNavigationTool() with blank, which will make\n  //\"freeorbit\" the active tool. This will trigger a HACK in Viewer3dImpl.setViewFromCamera\n  //which checks for that and uses a different initialization code path of the initial view.\n  //Only then, after this happens, we call activateDefaultNavigationTools(), which seems to\n  //override the name of the active tool somehow from \"freeorbit\" to \"orbit\"\n  //and would prevent the camera from initializing correctly.\n  //Ideally, the \"freeorbit\" hack would be removed from Viewer3dImpl and moved here, but this is\n  //beyond the scope of the Forge-Fluent merge at this point.\n\n  if (!preserveView && !model.getData().loadOptions.preserveView) {\n    this.setActiveNavigationTool();\n    this.impl.setViewFromFile(model, true);\n    this.toolController.recordHomeView();\n  }\n\n  this.registerDimensionSpecificHotkeys(model.is2d());\n  if (!preserveTools)\n  this.activateDefaultNavigationTools(model.is2d());\n\n  this.navigation.setIs2D(this.impl.modelQueue().areAll2D());\n\n  // For leaflet, restrict 2D navigation, so that we cannot zoom/pan away from the image\n  // and stop zoom-in when reaching max resolution.\n  if (model.isLeaflet()) {\n    var modelData = model.getData();\n    this.navigation.setConstraints2D(modelData.bbox, modelData.maxPixelPerUnit);\n  } else\n  {\n    // If it is not a leaflet model, clear constrain 2d.\n    // Otherwise, it will leak to the next model that viewer could open up.\n    this.navigation.setConstraints2D();\n  }\n};\n\n/**\n    * Loads a model into the viewer. Can be used sequentially to load multiple 3D models into the same scene.\n    * \n    * @param {string} url - The url to the model.\n    * @param {object} [options] - Dictionary of options.\n    * @param {Autodesk.Viewing.FileLoader} [options.fileLoader] - The file loader to use for this url. Required for unsupported file types.\n    * @param {object} [options.loadOptions] - May contain params that are specific for certain loaders/filetypes.\n    * @param {string} [options.sharedPropertyDbPath] - Optional path to shared property database.\n    * @param {string} [options.ids] - A list of object IDs to load.\n    * @param {bool}   [options.loadAsHidden] - By default, a new model is instantly shown and triggers viewer refreshes\n    *                                          during loading. Setting this option avoids that. The model can then be\n    *                                          shown later by calling showModel().\n    * @param {string} [options.modelNameOverride] - Allows host application to override model name used in UI.\n    * @param {LmvMatrix4} [options.placementTransform] - Applied to the model during loading.\n    * @param {string|Object} [options.applyScaling] - Unit-Scaling that is applied to the model on load, e.g. { from: 'ft', to: 'm' }.\n    *                                                 If 'from' is not set, it is determined from model metadata (if provided). If only 'to' is set,\n    *                                                 you can just assign a string directly, e.g. applyScaling = 'm' is the same as applyScaling = { to: 'm' }.\n    * @param {bool} [options.applyPlacementInModelUnits] - Only relevant if options.placementTransform and options.applyScaling are both used at once.\n    *                                                      In this way, it controls the order in which placement and scaling happen:\n    *                                                        - False: Placement happens in viewer world-units. That is, applyScaling is done first,\n    *                                                          then the custom placementMatrix is applied. (Default behavior)\n    *                                                        - True: Placement happens in model units. That is, custom placementMatrix is applied first,\n    *                                                          then the unit scaling. \n    * @param {Autodesk.Viewing.Viewer3D~onLoadModelSuccess} [onSuccessCallback] - A method that gets called when model's metadata loading is done\n    * and geometry streaming starts.\n    * @param {Autodesk.Viewing.Viewer3D~onLoadModelFailure} [onErrorCallback] - A method that gets called when loading fails.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#loadModel\n    */\nViewer3D.prototype.loadModel = /*#__PURE__*/function () {var _ref = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee(url, options, onSuccessCallback, onErrorCallback, onWorkerStart) {var self, reservation, skipParam, loaderInstance,\n\n\n\n\n\n\n\n\n\n\n\n\n\n    onDone,\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n    onError, match, fileExtension, loaderExtension, loader, returnValue, profile, dataToTrack;return regeneratorRuntime.wrap(function _callee$(_context) {while (1) {switch (_context.prev = _context.next) {case 0:onError = function _onError(errorCode, errorMessage, errorArgs) {\n              self._loadingSpinner.hide();\n              if (onErrorCallback) {\n                onErrorCallback(errorCode, errorMessage, errorArgs);\n              }\n            };onDone = function _onDone(error, model) {self.impl._removeLoadingFile(loaderInstance);if (error) {self.dispatchEvent({ type: et.LOADER_LOAD_ERROR_EVENT, error: error, loader: loaderInstance });onError(error.code, error.msg, error.args);return;}model.getData().underlayRaster = options.underlayRaster && model.getLeaflet();if (options.loadAsHidden) {self.impl.modelQueue().addHiddenModel(model);} else {self.impl.addModel(model);}if (model.loader && model.loader.notifiesFirstPixel && self._loadingSpinner instanceof LoadingSpinner) {// Remove loading spinner after at least a part of the model has made it to the screen\n                // At this point, only the model root (aka: just data, no graphics) has been received. \n                self.addEventListener(et.RENDER_FIRST_PIXEL, function () {self._loadingSpinner.hide();}, { once: true });} else {self._loadingSpinner.hide();} // LMV-5628: Show the forge logo.\n              if (!isNodeJS() && self._forgeLogo) {self._forgeLogo.style.display = \"block\";}if (onSuccessCallback) {onSuccessCallback(model);}};self = this; // Kind of sucks, but I couldn't think of a better way because loaders\n            // are so\n            reservation = self.impl._reserveLoadingFile(); // Reserve a slot for a loading file\n            options = options || {};if (typeof options.skipPropertyDb === \"undefined\") {skipParam = getParameterByName(\"skipPropertyDb\") || \"\";options.skipPropertyDb = skipParam === \"true\" ? true : skipParam === \"false\" ? false : undefined;}match = url.toLowerCase().match(/\\.([a-z0-9]+)(\\?|$)/), fileExtension = match ? match[1] : null; // Allow loader extension to be in the options block or the known extensions\n            loaderExtension = this.config && this.config.loaderExtensions && this.config.loaderExtensions[fileExtension] || fileExtension in loaderExtensions && loaderExtensions[fileExtension];\n            // If the loader is in an extension and the extension isn't loaded, then load it.\n            if (!(loaderExtension && !this.isExtensionLoaded(loaderExtension))) {_context.next = 19;break;}_context.prev = 9;_context.next = 12;return (\n\n\n              this.loadExtension(loaderExtension, this.config));case 12:_context.next = 19;break;case 14:_context.prev = 14;_context.t0 = _context[\"catch\"](9);\n\n            self.impl._removeLoadingFile(reservation);\n            onErrorCallback && onErrorCallback(ErrorCodes.VIEWER_INTERNAL_ERROR, _context.t0.toString());return _context.abrupt(\"return\",\n            false);case 19:\n\n\n\n\n            if (options && options.fileLoader) {\n              loader = options.fileLoader;\n            } else {\n              loader = FileLoaderManager.getFileLoaderForExtension(fileExtension);\n            }\n\n            // if there's no loader, don't try to create it and cause an error.\n            if (loader) {_context.next = 25;break;}\n            self.impl._removeLoadingFile(reservation);\n            logger.error(\"File extension not supported:\" + fileExtension, errorCodeString(ErrorCodes.UNSUPORTED_FILE_EXTENSION));\n            onError(ErrorCodes.UNSUPORTED_FILE_EXTENSION, \"File extension not supported\", 0, fileExtension);return _context.abrupt(\"return\",\n            false);case 25:\n\n\n            //Run some heuristics to adapt the viewing experience to the model we are about to display\n            this.setLoadHeuristics(options);\n\n            // Add spinner for first model\n            if (!this.impl.hasModels()) {\n              this._loadingSpinner.show();\n            }\n\n            // check whether there is a way to reuse existing loader\n            // for dwf/pdf it will generate document tree, that means\n            // 1 loader can load multiply model\n            if (typeof loader.getExistingInstance === \"function\") {\n              // we can keep an reference between the document created in DWFLoader with the instance who created\n              // once we navigate in the same dwf file, there is no need to create a new loader instance\n              loaderInstance = loader.getExistingInstance(url, options, this.config);\n            }\n            if (!loaderInstance) {\n              loaderInstance = new loader(this.impl, this.config);\n            }\n\n            self.impl._addLoadingFile(reservation, loaderInstance);\n            returnValue = loaderInstance.loadFile(url, options, onDone, onWorkerStart);\n            // If the loader returns false, make sure we don't wait for it.\n            if (!returnValue)\n            self.impl._removeLoadingFile(loaderInstance);\n\n            this.fireEvent({ type: et.LOADER_LOAD_FILE_EVENT, loader: loaderInstance });\n\n            // Setup of AO, Ghosting, Env Lighting etc.\n            // This will also setup the viewer.profile only for the web version of the viewer.\n            // This should work with the nodejs version, but loading the settings from the loadModel function causes some methods to be undefined. \n\n            // Initialize the profile only if the viewer.profile is not set.\n            // This will insure that the loadModel model functions sets the settings once.\n            if (!options.skipPrefs) {\n              if (!isNodeJS() && !this.profile) {\n                profile = this.chooseProfile(options);\n                this.setProfile(profile, false);\n              }\n            } else {\n              // These preferences are expected to be always available even if no profile is loaded\n              if (this.prefs.get(Prefs.DISPLAY_UNITS) === undefined) {\n                this.prefs.set(Prefs.DISPLAY_UNITS, new EnumType(displayUnitsEnum));\n              }\n              if (this.prefs.get(Prefs.DISPLAY_UNITS_PRECISION) === undefined) {\n                this.prefs.set(Prefs.DISPLAY_UNITS_PRECISION, new EnumType(displayUnitsPrecisionEnum));\n              }\n            }\n\n            // analytics\n            dataToTrack = getLoadModelData(url, fileExtension, returnValue, options.bubbleNode);\n            analytics.track('viewer.model.load', dataToTrack);return _context.abrupt(\"return\",\n\n            returnValue);case 37:case \"end\":return _context.stop();}}}, _callee, this, [[9, 14]]);}));return function (_x, _x2, _x3, _x4, _x5) {return _ref.apply(this, arguments);};}();\n\n\n\n/**\n                                                                                                                                                                                           * Check whether models are completely loaded\n                                                                                                                                                                                           * This method checks all models in the model queue and load requests that haven't loaded\n                                                                                                                                                                                           * the root model yet. A model is completely loaded when the root model is loaded, all of\n                                                                                                                                                                                           * the geometry is loaded, the property database, if present is loaded and no textures are\n                                                                                                                                                                                           * being loaded.\n                                                                                                                                                                                           * @param {Object} [include] Optional object to set the scope of the wait\n                                                                                                                                                                                           * @param {Boolean} [include.geometry] Set to false to exclude the geometry loading\n                                                                                                                                                                                           *  from consideration. Because textures are loaded with geometry, include.textures\n                                                                                                                                                                                           *  must also be set to false to prevent geometry from being considered. Defaults to true.\n                                                                                                                                                                                           * @param {Boolean} [include.propDb] Set to false to exclude the property data base loading\n                                                                                                                                                                                           *  from consideration. Defaults to true.\n                                                                                                                                                                                           * @param {Boolean} [include.textures] Set to false to exclude the texture loading\n                                                                                                                                                                                           *  from consideration. Defaults to true.\n                                                                                                                                                                                           * @param {Boolean} [include.hidden] Set to true to include hidden models\n                                                                                                                                                                                           *  for consideration. Defaults to false.\n                                                                                                                                                                                           * @param {Model|Model[]} [include.onlyModels] Limits the check to the model or models\n                                                                                                                                                                                           *  in this property. Note that checking for textures loaded cannot be limited to models.\n                                                                                                                                                                                           * @return True if all models are completely loaded, otherwise false\n                                                                                                                                                                                           * \n                                                                                                                                                                                           * @alias Autodesk.Viewing.Viewer3D#isLoadDone\n                                                                                                                                                                                           */\nViewer3D.prototype.isLoadDone = function () {var _ref2 = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},_ref2$geometry = _ref2.geometry,geometry = _ref2$geometry === void 0 ? true : _ref2$geometry,_ref2$propDb = _ref2.propDb,propDb = _ref2$propDb === void 0 ? true : _ref2$propDb,_ref2$textures = _ref2.textures,textures = _ref2$textures === void 0 ? true : _ref2$textures,_ref2$hidden = _ref2.hidden,hidden = _ref2$hidden === void 0 ? false : _ref2$hidden,_ref2$onlyModels = _ref2.onlyModels,onlyModels = _ref2$onlyModels === void 0 ? undefined : _ref2$onlyModels;\n  // If we are only checking for specific models, then ignore whether the viewer\n  // is started and whether other loaders are starting\n  if (!onlyModels) {\n    // If we haven't initiialized the viewer, then the load is done.\n    if (!this.started)\n    return true;\n\n    // If a load is in progress that hasn't called onDone then we are not done\n    if (this.impl._hasLoadingFile())\n    return false;\n  }\n\n  // If we are waiting for textures and textures are in progress, then we are not done.\n  if (textures && Autodesk.Viewing.Private.TextureLoader.requestsInProgress() > 0)\n  return false;\n\n  geometry = geometry || textures; // Waiting for textures forces waiting for geometry\n\n  // Check whether a model is loaded\n  var isModelLoaded = function isModelLoaded(model) {\n    return !model ||\n    (geometry ? model.isLoadDone() : model.modelRootLoaded) && (\n    !propDb || !model.getPropertyDb() || model.getPropertyDb().isLoadDone());\n\n  };\n\n  if (onlyModels) {\n    if (Array.isArray(onlyModels))\n    return onlyModels.every(isModelLoaded);\n    return isModelLoaded(onlyModels);\n  }\n\n  var models = this.impl.modelQueue();\n  return models.getModels().every(isModelLoaded) && (\n  !hidden || models.getHiddenModels().every(isModelLoaded));\n};\n\n/**\n    * Wait for models to be completely loaded\n    * This method checks all models in the model queue and load requests that haven't loaded\n    * the root model yet. A model is completely loaded when the root model is loaded, all of\n    * the geometry is loaded, the property database, if there is one, is loaded and no textures are\n    * being loaded. If this method is called before the viewer is started, then it will wait\n    * until the viewer starts and at least one model start loading to check for the load completing\n    * @param {Object} [include] Optional object to set the scope of the wait\n    * @param {Boolean} [include.geometry] Set to false to exclude the geometry loading\n    *  from consideration. Because textures are loaded with geometry, include.textures\n    *  must also be set to false to prevent waiting for geometry to load. Defaults to true.\n    * @param {Boolean} [include.propDb] Set to false to exclude the property data base loading\n    *  from consideration. Defaults to true.\n    * @param {Boolean} [include.textures] Set to false to exclude the texture loading\n    *  from consideration. Defaults to true.\n    * @param {Boolean} [include.hidden] Set to true to include hidden models\n    *  for consideration. Defaults to false.\n    * @param {Model|Model[]} [include.onlyModels] Limits the wait to the model or models\n    *  in this property. Note that waiting for textures loaded cannot be limited to models.\n    * @return Promise that resolves when all models are loaded. This promise can be rejected\n    *  by a LOADER_LOAD_ERROR_EVENT event.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#waitForLoadDone\n    */\nViewer3D.prototype.waitForLoadDone = function (include) {var _this2 = this;\n  return new Promise(function (resolve, reject) {var _ref3 =\n\n    include || {},_ref3$geometry = _ref3.geometry,geometry = _ref3$geometry === void 0 ? true : _ref3$geometry,_ref3$propDb = _ref3.propDb,propDb = _ref3$propDb === void 0 ? true : _ref3$propDb,_ref3$textures = _ref3.textures,textures = _ref3$textures === void 0 ? true : _ref3$textures,_ref3$hidden = _ref3.hidden,hidden = _ref3$hidden === void 0 ? false : _ref3$hidden,_ref3$onlyModels = _ref3.onlyModels,onlyModels = _ref3$onlyModels === void 0 ? undefined : _ref3$onlyModels;\n    geometry = geometry || textures;\n    var _include = { geometry: geometry, propDb: propDb, textures: textures, hidden: hidden, onlyModels: onlyModels };\n\n    // We don't say the viewer is started until we \n    var hasStartedLoading = function hasStartedLoading() {\n      return _this2.started && (_this2.impl._hasLoadingFile() > 0 ||\n      _this2.impl.modelQueue().getModels().length > 0 ||\n      _this2.impl.modelQueue().getHiddenModels().length > 0);\n    };\n\n    // Has the viewer and a loader started? If we are checking specific\n    // models, then we don't need to wait for the viewer or a loader to start.\n    var started = !onlyModels && hasStartedLoading();\n\n    // If we haven't started or the load is done, then wait is finished\n    if (started && _this2.isLoadDone(_include)) {\n      resolve();\n      return;\n    }\n\n    var unregister;\n\n    // On each load-relevant event, check if loading is finished.\n    var onEvent = function onEvent() /* event */{\n\n      started = started || hasStartedLoading();\n\n      // const pending = (this.impl.loaders && this.impl.loaders.length) || 0;\n      // const visible = (this.impl.modelQueue() && this.impl.modelQueue().getModels().length) || 0;\n      // const hidden = (this.impl.modelQueue() && this.impl.modelQueue().getHiddenModels().length) || 0;\n      // const model = (event.loader && event.loader.model) ? event.loader.model.id :\n      //     (event.model ? event.model.id : \"N/A\");\n\n      // If we have never seen the viewer started, then continue waiting\n      // Otherwise wait until the viewer isn't started, or loading is done\n      if (!started || !_this2.isLoadDone(_include)) {\n        // logger.debug(`waitForLoadDone: Not resolved - Event - ${event.type}, Model - ${model}, Started - ${started}, Pending ${pending}, Visible - ${visible}, Hidden - ${hidden}`);\n        return;\n      }\n\n      unregister();\n      resolve();\n      // logger.debug(`waitForLoadDone: Resolved - Event - ${event.type}, Model - ${model}, Started - ${started}, Pending ${pending}, Visible - ${visible}, Hidden - ${hidden}`);\n    };\n\n    var onError = function onError(event) {\n      unregister();\n      // We may be able to continue waiting after an error, but there isn't\n      // any consistency in the loaders to make that determination, so I will\n      // reject the promise using the event object.\n      var error = new Error('Error loading model');\n      error.loader = event.loader;\n      error.error = event.error;\n      reject(error);\n    };\n\n    unregister = function unregister() {\n      if (geometry)\n      _this2.removeEventListener(et.GEOMETRY_LOADED_EVENT, onEvent);\n      if (propDb) {\n        _this2.removeEventListener(et.OBJECT_TREE_CREATED_EVENT, onEvent);\n        _this2.removeEventListener(et.OBJECT_TREE_UNAVAILABLE_EVENT, onEvent);\n      }\n      if (textures)\n      _this2.removeEventListener(et.TEXTURES_LOADED_EVENT, onEvent);\n      _this2.removeEventListener(et.LOADER_LOAD_FILE_EVENT, onEvent);\n      _this2.removeEventListener(et.MODEL_ADDED_EVENT, onEvent);\n      _this2.removeEventListener(et.MODEL_REMOVED_EVENT, onEvent);\n      _this2.removeEventListener(et.LOADER_LOAD_ERROR_EVENT, onError);\n      _this2.removeEventListener(et.MODEL_ROOT_LOADED_EVENT, onEvent);\n      _this2.removeEventListener(et.VIEWER_UNINITIALIZED, resolve); // If the viewer is finished, resolve the promise.\n    };\n\n    // register event listeners to try again if something changes\n    if (geometry)\n    _this2.addEventListener(et.GEOMETRY_LOADED_EVENT, onEvent);\n    if (propDb) {\n      _this2.addEventListener(et.OBJECT_TREE_CREATED_EVENT, onEvent);\n      _this2.addEventListener(et.OBJECT_TREE_UNAVAILABLE_EVENT, onEvent);\n    }\n    if (textures)\n    _this2.addEventListener(et.TEXTURES_LOADED_EVENT, onEvent);\n    _this2.addEventListener(et.LOADER_LOAD_FILE_EVENT, onEvent);\n    _this2.addEventListener(et.MODEL_ADDED_EVENT, onEvent);\n    _this2.addEventListener(et.MODEL_REMOVED_EVENT, onEvent);\n    _this2.addEventListener(et.LOADER_LOAD_ERROR_EVENT, onError);\n    // MODEL_ROOT_LOADED_EVENT is a little different. The flag we check for\n    // root loaded is set in a MODEL_ROOT_LOADED_EVENT handler. So we use\n    // an arbitrary low priority to guarantee we are called after that handler.\n    _this2.addEventListener(et.MODEL_ROOT_LOADED_EVENT, onEvent, { priority: -1000000 });\n    // If the viewer is finished, resolve the promise. The viewer\n    // uninitialize method clears the listeners.\n    _this2.addEventListener(et.VIEWER_UNINITIALIZED,\n    function () {return reject(new Error(\"Promise reject because viewer finished\"));});\n  });\n};\n\n\n//Temporarily exported until Fluent adjusts to using loadDocumentNode\nexport function waitForCompleteLoad(viewer, options) {\n\n  return new Promise(function (resolve, reject) {\n\n    var loadedParts = 0;\n\n    function endPromiseMaybe(model) {\n      if (loadedParts === 2) {\n        resolve({ viewer: viewer, model: model });\n      }\n    }\n\n    //We have to wait for two or three things to happen in order to\n    //say that the model is fully loaded. (1) the geometry,\n    //(2) the material textures and (3) optionally the property database\n    //The logic below hooks into various event callbacks to make this happen.\n\n    //Callback on geometry load complete\n    function gcb(e) {\n\n      //Make sure we handle only the model we want this callback to handle\n      //as we load multiple sheets into the same viewer context\n      if (e.model.getData().loadOptions.bubbleNode !== options.bubbleNode)\n      return;\n\n\n      viewer.removeEventListener(et.GEOMETRY_LOADED_EVENT, gcb);\n\n      loadedParts++;\n\n      //Call getProperties to make sure property db is loaded,\n      //then continue with hashing\n      if (options.skipPropertyDb) {\n        endPromiseMaybe(e.model);\n      } else {\n        e.model.getProperties(\n        1,\n        function (success) {return endPromiseMaybe(e.model);},\n        function (error) {return reject(error);});\n\n      }\n\n    }\n    viewer.addEventListener(et.GEOMETRY_LOADED_EVENT, gcb);\n\n\n    function tcb(e) {\n\n      //Make sure we handle only the model we want this callback to handle\n      //as we load multiple sheets into the same viewer context\n      if (e.model.getData().loadOptions.bubbleNode !== options.bubbleNode)\n      return;\n\n      viewer.removeEventListener(et.TEXTURES_LOADED_EVENT, tcb);\n\n      loadedParts++;\n\n      endPromiseMaybe(e.model);\n    }\n    viewer.addEventListener(et.TEXTURES_LOADED_EVENT, tcb);\n  });\n}\n\n/**\n   * Unloads the specified model.\n   * Reference {@link Autodesk.Viewing.Viewer3D#hideModel} to hide the model.\n   * @param {Autodesk.Viewing.Model} model - The model to unload.\n   * \n   * @alias Autodesk.Viewing.Viewer3D#unloadModel\n   */\nViewer3D.prototype.unloadModel = function (model) {\n  if (!model) {\n    model = this.model;\n  }\n\n  this.impl.unloadModel(model);\n};\n\n\n/**\n    * \n    * @param {Autodesk.Viewing.Document} avDocument - The Document instance, which owns the model being loaded\n    * @param {Autodesk.Viewing.BubbleNode} manifestNode - The specific manifest node to load (within the Document) \n    * @param {ViewerConfig} [options] - Options to pass to {@link Autodesk.Viewing.Viewer3D#loadModel}. Will be initialized internally if not specified.\n    *                                   The options object will be augmented by automatically determined load parameters.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#loadDocumentNode\n    */\nViewer3D.prototype.loadDocumentNode = function (avDocument, manifestNode) {var _this3 = this;var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};\n\n  var bubbleNode = manifestNode;\n\n  //var modelRootUrl = bubbleNode.getViewableRootPath();\n  var leafletOptions = options.leafletOptions || {};\n\n  var modelRootUrl = avDocument.getViewableUrn(bubbleNode, leafletOptions);\n  var sharedDbPath = bubbleNode.findPropertyDbPath();\n\n  modelRootUrl = avDocument.getFullPath(modelRootUrl);\n  sharedDbPath = avDocument.getFullPath(sharedDbPath);\n\n  var loadOptions = {\n    sharedPropertyDbPath: sharedDbPath,\n    acmSessionId: avDocument.getAcmSessionId(modelRootUrl),\n    bubbleNode: bubbleNode,\n    // Auto-center model by default. This avoids shaking geometry / z-issues for georeferenced models.\n    // Note: If you display multiple models at once, you may have change it to true and set a fixed globalOffset to align them properly.\n    applyRefPoint: false,\n    loadOptions: leafletOptions,\n    page: leafletOptions.page || 1 };\n\n\n  for (var p in loadOptions) {\n    if (!options.hasOwnProperty(p))\n    options[p] = loadOptions[p];\n  }\n\n  if (!options.keepCurrentModels && this.impl.hasModels()) {\n    var _conf = this.config;\n    this.tearDown();\n    this.setUp(_conf);\n  }\n\n  var geomNode = bubbleNode.findParentGeom2Dor3D();\n  var modelExtensions = geomNode.extensions();\n  if (Array.isArray(modelExtensions)) {\n    modelExtensions.forEach(function (extId) {\n      _this3.loadExtension(extId, _this3.config);\n    });\n  }\n\n  var res = leafletOptions.isPdf ? this.loadExtension(\"Autodesk.PDF\", this.config) : Promise.resolve();\n\n  var useUnderlayRaster = !options.disableUnderlayRaster && leafletOptions.tempRasterPath;\n  var tempRasterPromise = useUnderlayRaster ? this._loadTempRasterModel(avDocument, options, bubbleNode) : Promise.resolve();\n\n  return res.then(function () {return tempRasterPromise;}).\n  then(function () {return new Promise(function (resolve, reject) {\n      _this3.loadModel(modelRootUrl, options,\n      function (model) {\n        // By default, auto-initialize the camera. This might not be wanted though if either\n        //  a) A model is just loaded in the background, but not supposed to be shown immediately, or\n        //  b) A model is supposed to be shown, but just added to an aggregated view without view reset.\n        var keepView = options.loadAsHidden || options.preserveView;\n        if (!keepView && bubbleNode.type() === 'view') {\n          _this3.setView(bubbleNode, { skipTransition: true });\n        }\n\n        resolve(model);\n      },\n      function (error) {\n        reject(error);\n      });\n\n    });});\n};\n\n// Unloads a model previously loaded by loadDocumentNode(). \n//  @param {BubbleNode} manifestNode\n//  @returns {bool} true on success\nViewer3D.prototype.unloadDocumentNode = function (manifestNode) {\n\n  // If model is in memory, just unload it.\n  var model = this.impl.findModel(manifestNode, true);\n  if (model) {\n    this.impl.unloadModel(model);\n    return true;\n  }\n\n  // If there are no loaders in progress, we are done here.\n  if (!this.impl.loaders) {\n    return false;\n  }\n\n  // Check if any loader is currently loading the model root\n  //\n  // Note: Cancelling loading only works for loaders that properly supports it. (so far: Otg, F2D, Svf)\n  //       For this, a loader must:\n  //         - Provide the load options in loader.options\n  //         - Properly handle the case that dtor is called before model root is loaded, e.g. avoiding any further callback invocation\n  for (var i = 0; i < this.impl.loaders.length; i++) {\n\n    // Check if the loader's docNode matches with the one we want to unload\n    var loader = this.impl.loaders[i];\n    var loaderNode = loader.options && loader.options.bubbleNode;\n    if (loaderNode === manifestNode) {\n\n      // Loader found - stop it\n      loader.dtor();\n      this.impl.loaders.splice(i, 1);\n      return true;\n    }\n  }\n\n  // Nothing found to unload. Either the model was never loaded, was already unloaded, or is in progress and the loader does not support \n  // to cancel loading \n  return false;\n};\n\n// Loads a temp raster model underneath the main vector model, in order to let the user a better \"time to first pixel\" experience.\nViewer3D.prototype._loadTempRasterModel = function (avDocument, options, bubbleNode) {var _this4 = this;\n  return new Promise(function (resolve, reject) {\n    // If the main model should load as hidden, than there is no need for loading the temp leaflet model.\n    if (options.loadAsHidden) {\n      return resolve();\n    }\n\n    // Signals that the model is not a \"real\" one, so it won't trigger GUI and extension loading.\n    options.underlayRaster = true;\n    // This will force the leaflet model to be created at the same scale as the main model. (Instead of scale of [0,1]).\n    options.loadOptions.fitPaperSize = true;\n\n    var isMainModel = function isMainModel(model) {var _docNode$getDocument, _bubbleNode$getDocume;\n      var docNode = model.getDocumentNode();\n      return docNode && ((_docNode$getDocument = docNode.getDocument()) === null || _docNode$getDocument === void 0 ? void 0 : _docNode$getDocument.getPath()) === ((_bubbleNode$getDocume = bubbleNode.getDocument()) === null || _bubbleNode$getDocume === void 0 ? void 0 : _bubbleNode$getDocume.getPath()) &&\n      docNode.guid() === bubbleNode.guid() &&\n      !model.isLeaflet();\n    };\n\n    var onMainModelAdded = function onMainModelAdded(_ref4) {var model = _ref4.model;\n      if (isMainModel(model)) {\n        // Initialize the viewer according to the main model, but preserve the current camera.\n        // Note: if we are in hypermodeling this shouldn't be done, so check that only 2 models\n        // (the raster and the vector) are loaded.\n        if (_this4.getVisibleModels().length === 2) {\n          _this4.initializeFirstModelPresets(model, false, true);\n        }\n\n        _this4.removeEventListener(et.MODEL_ADDED_EVENT, onMainModelAdded);\n      }\n    };\n    _this4.addEventListener(et.MODEL_ADDED_EVENT, onMainModelAdded);\n\n    var onMainModelRemoved = function onMainModelRemoved(_ref5) {var model = _ref5.model;\n      if (isMainModel(model)) {\n        // Restore main model's background.\n        model.changePaperVisibility(true);\n\n        _this4.removeEventListener(et.MODEL_REMOVED_EVENT, onMainModelRemoved);\n        _this4.removeEventListener(et.MODEL_ADDED_EVENT, onMainModelAdded);\n        _this4.removeEventListener(et.GEOMETRY_LOADED_EVENT, onMainModelLoadDone);\n      }\n    };\n    _this4.addEventListener(et.MODEL_REMOVED_EVENT, onMainModelRemoved);\n\n    var rasterModel;\n\n    var onMainModelLoadDone = function onMainModelLoadDone(_ref6) {var model = _ref6.model;\n      if (isMainModel(model)) {\n        // Restore main model's background.\n        model.changePaperVisibility(true);\n        // No need for main model's cleanup anymore.\n        _this4.removeEventListener(et.MODEL_REMOVED_EVENT, onMainModelRemoved);\n\n        // No need for the temp model anymore.\n        if (rasterModel) {\n          _this4.unloadModel(rasterModel);\n          rasterModel = null;\n        }\n\n        _this4.removeEventListener(et.GEOMETRY_LOADED_EVENT, onMainModelLoadDone);\n      }\n    };\n    _this4.addEventListener(et.GEOMETRY_LOADED_EVENT, onMainModelLoadDone);\n\n    var rasterUrl = avDocument.getFullPath(options.loadOptions.tempRasterPath);\n\n    _this4.loadModel(rasterUrl,\n    options,\n    function (model) {\n      // clean options for next model.\n      options.loadOptions.fitPaperSize = undefined;\n      options.underlayRaster = undefined;\n      options.hideBackground = true;\n\n      rasterModel = model;\n      resolve(model);\n    },\n    function (errorCode) {\n      // clean options for next model.\n      options.loadOptions.fitPaperSize = undefined;\n      options.underlayRaster = undefined;\n\n      if (errorCode === ErrorCodes.LOAD_CANCELED) {\n        return reject('load canceled');\n      }\n\n      // Don't block main model loading in case of failure\n      resolve();\n    });\n\n  });\n};\n\n/**\n    * Returns the dimensions of the WebGL canvas.\n    * \n    * @returns {object} Client rectangle bounds object { width:Number, height: Number }\n    * \n    * @alias Autodesk.Viewing.Viewer3D#getDimensions\n    */\nViewer3D.prototype.getDimensions = function () {\n  if (this.container) {\n    // NB: Getting dimensions of the client container instead of the container.\n    //     At least in IE11, getting dimensions on the dynamically created\n    //     child of the dynamically created parent returns a 0 height.\n    var rect = {};\n    if (this.getScreenMode() === ScreenMode.kFullScreen) {\n      rect.width = screen.width;\n      rect.height = screen.height;\n    } else {\n      rect = this.container.getBoundingClientRect();\n    }\n\n    return {\n      width: rect.width,\n      height: rect.height };\n\n  }\n\n  return null;\n};\n\n\n/**\n    * Resizes the viewer. Required when wrapping div changes dimensions due to CSS changes.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#resize\n    */\nViewer3D.prototype.resize = function ()\n{\n  if (this.container.clientWidth > 0 && this.container.clientHeight > 0) {\n    this.impl.resize(this.container.clientWidth, this.container.clientHeight);\n  }\n};\n\n/**\n    * @returns {Autodesk.Viewing.HotkeyManager} The hotkey manager.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#getHotkeyManager\n    */\nViewer3D.prototype.getHotkeyManager = function ()\n{\n  return this._hotkeyManager;\n};\n\n/**\n    * Gets the camera so it can be modified by the client.\n    * @returns {THREE.Camera} The active camera.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#getCamera\n    */\nViewer3D.prototype.getCamera = function ()\n{\n  return this.impl.camera;\n};\n\n/**\n    * Gets the view state as a plain object.\n    * A viewer state contains data for the viewport, selection and isolation,  \n    *\n    * @tutorial viewer_state\n    * \n    * @param {object} [filter] - Specifies which viewer values to get.\n    * @returns {object} Viewer state.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#getState\n    */\nViewer3D.prototype.getState = function (filter) {\n  return this.viewerState.getState(filter);\n};\n\n/**\n    * Restores the viewer state from a given object.\n    * \n    * @tutorial viewer_state\n    * \n    * @param {Object} viewerState\n    * @param {Object} [filter] - Similar in structure to viewerState used to filter out values\n    * that should not be restored.\n    * @param {boolean} [immediate] - Whether the new view is applied with (true) or without transition (false).\n    * @returns {boolean} True if restore operation was successful.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#restoreState\n    * @fires Autodesk.Viewing#VIEWER_STATE_RESTORED_EVENT\n    */\nViewer3D.prototype.restoreState = function (viewerState, filter, immediate) {\n  var success = this.viewerState.restoreState(viewerState, filter, immediate);\n  if (success) {\n    this.dispatchEvent({ type: et.VIEWER_STATE_RESTORED_EVENT, value: success });\n  }\n  return success;\n};\n\n/**\n    * Loads a view specified in the Manifest JSON.\n    * For 3D models it will use the camera values.\n    * For 2D models it will use the viewBox values.\n    * \n    * Notice that in order that the view will be properly set according to the model's transformation, the model has to be loaded first.\n    * \n    * @param {BubbleNode} viewNode \n    * @param {Object} [options] \n    * @param {boolean} [options.skipTransition=false] - true to apply instanstly instead of lerping. \n    * @param {boolean} [options.useExactCamera=true] - whether any up vector adjustment is to be done (to keep head up view)\n    * \n    * @returns {boolean} true, if the view is applied.\n    */\nViewer3D.prototype.setView = function (viewNode, options) {\n\n  if (!viewNode || !(viewNode instanceof BubbleNode))\n  return false;\n\n  var parentGeom = viewNode.findParentGeom2Dor3D();\n\n  // Find the viewNode's model, according to its parent geometry.\n  // As a fallback, use the main model.\n  var model = parentGeom && this.impl.findModel(parentGeom, true) || this.model;\n\n  if (!model)\n  return false;\n\n  var skipTransition = options ? options.skipTransition : false;\n  var useExactCamera = options ? options.useExactCamera : true;\n\n  // 2D models\n  if (viewNode.getViewBox()) {\n    this.setViewFromViewBox(viewNode.getViewBox(), viewNode.name(), skipTransition);\n    this.dispatchEvent({ type: et.SET_VIEW_EVENT, view: viewNode });\n    return true;\n  }\n\n  // 3D models\n  var camera = this.getCameraFromViewArray(viewNode.data.camera, model);\n\n  if (camera) {\n    this.impl.setViewFromCamera(camera, skipTransition, useExactCamera);\n  } else {\n    return false;\n  }\n\n  // Camera loaded, any section planes or boxes?\n  var sp = viewNode.data.sectionPlane;\n  var sb = viewNode.data.sectionBox;\n  var sbt = viewNode.data.sectionBoxTransform;\n\n  var transform = model.getModelToViewerTransform();\n\n  if (sp) {\n\n    // Variable `sp` contains one or more planes. Each plane is\n    // defined by 4 numbers, so sp will have either 4, 8, 12, etc values,\n    // for 1, 2, 3, etc planes.\n\n    var cutplanes = [];\n\n    for (var i = 0; i < sp.length; i += 4) {\n      var plane = new THREE.Plane(new THREE.Vector3(sp[i + 0], sp[i + 1], sp[i + 2]), sp[i + 3]);\n\n      if (transform) {\n        plane.applyMatrix4(transform);\n      }\n\n      cutplanes.push(\n      new THREE.Vector4(\n      plane.normal.x,\n      plane.normal.y,\n      plane.normal.z,\n      plane.constant));\n\n    }\n\n    this.impl.setCutPlaneSet('__set_view', cutplanes);\n\n  } else if (sb && sbt) {\n\n    var sbTransformMatrix = new THREE.Matrix4().fromArray([\n    sbt[0], sbt[1], sbt[2], sbt[3],\n    sbt[4], sbt[5], sbt[6], sbt[7],\n    sbt[8], sbt[9], sbt[10], sbt[11],\n    sbt[12], sbt[13], sbt[14], sbt[15]]);\n\n\n    sbTransformMatrix.multiply(transform);\n\n    var min = new THREE.Vector3(sb[0], sb[1], sb[2]);\n    var max = new THREE.Vector3(sb[3], sb[4], sb[5]);\n    var box = new THREE.Box3(min, max);\n    box.applyMatrix4(sbTransformMatrix);\n\n    var planes = SceneMath.box2CutPlanes(box);\n    this.impl.setCutPlaneSet('__set_view', planes);\n\n  } else {\n\n    this.impl.setCutPlaneSet('__set_view', undefined);\n  }\n\n  this.dispatchEvent({ type: et.SET_VIEW_EVENT, view: viewNode });\n  return true;\n};\n\nViewer3D.prototype.setViewType = function (viewType) {\n  if (this.model && this.model.is2d())\n  {\n    logger.warn(\"Viewer3D.setViewType is not applicable to 2D\");\n    return;\n  }\n  this.prefs.set(Prefs3D.VIEW_TYPE, viewType);\n};\n\n/**\n    * Sets the view from an array of parameters.\n    * @param {array} params - View parameters:\n    * - position-x\n    * - position-y\n    * - position-z\n    * - target-x\n    * - target-y\n    * - target-z\n    * - up-x\n    * - up-y\n    * - up-z\n    * - aspect\n    * - fov (radians)\n    * - orthoScale\n    * - isPerspective (0=perspective, 1=ortho)\n    */\nViewer3D.prototype.setViewFromArray = function (params)\n{\n  //TODO: It might be best to get rid of the setViewFromArray API as it's not\n  //very descriptive, and move the params->camera conversion to the bubble-reading\n  //logic elsewhere.\n  var camera = this.getCameraFromViewArray(params);\n  this.impl.setViewFromCamera(camera, false, true);\n};\n\n/**\n    * Returns an object representing a Camera from an unintuitive array of number.\n    * Note: To use this function in multi-model scenarios, you must pass the model parameter.\n    * \n    * @param {Number[]} params - Array with 13 elements describing different aspects of a camera.\n    * @param {Autodesk.Viewing.Model} [model] - Camera is transformed in the same way as the model. Default is this.model (only sufficient for single-view scenarios).\n    * @returns {Object|null} - Camera object, or null if argument is invalid or missing.\n    */\nViewer3D.prototype.getCameraFromViewArray = function (params) {var model = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : this.model;\n\n  // Make sure that camera is transformed in the same way as model (if there is one)\n  var transform = model === null || model === void 0 ? void 0 : model.getModelToViewerTransform();\n\n  return BubbleNode.readCameraFromArray(params, transform);\n};\n\n/**\n    * Returns an Array of values that could be inserted back into\n    * a manifest to represent a view.\n    */\nViewer3D.prototype.getViewArrayFromCamera = function () {\n  var off = this.model ? this.model.getData().globalOffset : { x: 0, y: 0, z: 0 };\n  return this.impl.getViewArrayFromCamera(off);\n};\n\n/**\n    * Sets the view from an array representing a view box.\n    *\n    * Not applicable to 3D.\n    *\n    * @param {Number[]} viewbox - View parameters:\n    * - min-x\n    * - min-y\n    * - max-x\n    * - max-y\n    * @param {string} [name] - Optional named view name to also set the layer visibility state\n    * associated with this view.\n    * @param {boolean} [skipTransition] - true to apply instanstly instead of lerping. \n    * \n    * @alias Autodesk.Viewing.Viewer3D#setViewFromViewBox\n    */\nViewer3D.prototype.setViewFromViewBox = function (viewbox, name, skipTransition)\n{\n  var model = this.model;\n\n  if (model && !model.is2d())\n  {\n    logger.warn(\"Viewer3D.setViewFromViewBox is not applicable to 3D\");\n    return;\n  }\n\n  //set the layer state if any\n  //It's annoying to search the views and states as arrays,\n  //but this is the only place we do this, so converting them\n  //to hashmaps is not necessary (yet).\n  if (name && name.length) {\n    var metadata = model.getData().metadata;\n    var views = metadata.views;\n\n    var i;\n    for (i = 0; i < views.length; i++) {\n      if (views[i].name == name)\n      break;\n    }\n\n    if (i < views.length) {\n      var state_name = views[i].layer_state;\n      if (state_name)\n      this.activateLayerState(state_name);\n    }\n  }\n\n  //Finally set the camera\n  this.impl.setViewFromViewBox(this.model, viewbox, name, skipTransition);\n};\n\n/**\n    * Changes the active layer state.\n    * Layes is a feature usually available on 2D models and some 3D models. \n    *\n    * @param {string} stateName - Name of the layer state to activate.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#activateLayerState\n    * \n    * @see Autodesk.Viewing.Viewer3D#getLayerStates\n    * @fires  Autodesk.Viewing#LAYER_VISIBILITY_CHANGED_EVENT\n    */\nViewer3D.prototype.activateLayerState = function (stateName)\n{\n  this.impl.layers.activateLayerState(stateName);\n  this.dispatchEvent({ type: et.LAYER_VISIBILITY_CHANGED_EVENT });\n};\n\n/**\n    * Returns information for each layer state: name, description, active.\n    * Activate a state through {@link Autodesk.Viewing.Viewer3D#activateLayerState}.\n    * @returns {array}\n    * \n    * @alias Autodesk.Viewing.Viewer3D#getLayerStates\n    */\nViewer3D.prototype.getLayerStates = function () {\n\n  return this.impl.layers.getLayerStates();\n};\n\n/**\n    * Sets the view using the default view in the source file.\n    * \n    * @param {Autodesk.Viewing.Model} [model] - The model, defaults to the loaded model.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setViewFromFile\n    */\nViewer3D.prototype.setViewFromFile = function (model)\n{\n  this.setActiveNavigationTool();\n  this.impl.setViewFromFile(model || this.model);\n};\n\n/**\n    * Gets the properties for an ID.\n    * \n    * @param {number} dbid - The database identifier.\n    * @param {Callbacks#onPropertiesSuccess} [onSuccessCallback] - Callback for when the properties are fetched.\n    * @param {Callbacks#onGenericError} [onErrorCallback] - Callback for when the properties are not found or another error occurs.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#getProperties\n    */\nViewer3D.prototype.getProperties = function (dbid, onSuccessCallback, onErrorCallback)\n{\n  if (this.model) {\n    this.model.getProperties(dbid, onSuccessCallback, onErrorCallback);\n  } else\n  {\n    if (onErrorCallback)\n    onErrorCallback(ErrorCodes.BAD_DATA, \"Properties failed to load since model does not exist\");\n  }\n};\n\n/**\n    * Gets the viewer model object tree. Once the tree is received it will invoke the specified callback function.\n    *\n    * You can use the model object tree to get information about items in the model.  The tree is made up\n    * of nodes, which correspond to model components such as assemblies or parts.\n    * \n    * @param {Callbacks#onObjectTreeSuccess} [onSuccessCallback] - Success callback invoked once the object tree is available.\n    * @param {Callbacks#onGenericError} [onErrorCallback] - Error callback invoked when the object tree is not found available.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#getObjectTree\n    */\nViewer3D.prototype.getObjectTree = function (onSuccessCallback, onErrorCallback)\n{\n  if (this.model) {\n    this.model.getObjectTree(onSuccessCallback, onErrorCallback);\n  } else\n  {\n    if (onErrorCallback)\n    onErrorCallback(ErrorCodes.BAD_DATA, \"ObjectTree failed to load since model does not exist\");\n  }\n};\n\n/**\n    * Sets the click behavior on the canvas to follow config.\n    * This is used to change the behavior of events such as selection or Center-of-Interest changed.\n    * @example\n    *  {\n    *       \"click\": {\n    *           \"onObject\": [ACTIONS],\n    *           \"offObject\": [ACTIONS]\n    *       },\n    *       \"clickCtrl\": {\n    *           \"onObject\": [ACTIONS],\n    *           \"offObject\": [ACTIONS]\n    *       },\n    *       \"clickShift\": {\n    *           ...\n    *       },\n    *       \"clickCtrlShift\": {\n    *           ...\n    *       },\n    *       \"disableSpinner\": BOOLEAN\n    *       \"disableMouseWheel\": BOOLEAN,\n    *       \"disableTwoFingerSwipe\": BOOLEAN\n    *  }\n    *\n    * Actions can be any of the following:\n    * - \"selectOnly\"\n    * - \"selectToggle\"\n    * - \"deselectAll\"\n    * - \"isolate\"\n    * - \"showAll\"\n    * - \"setCOI\"\n    * - \"focus\"\n    * - \"hide\"\n    * @param {object} config - Parameter object that meets the above layout.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setCanvasClickBehavior\n    */\nViewer3D.prototype.setCanvasClickBehavior = function (config)\n{\n  if (this.impl.controls.hasOwnProperty(\"setClickBehavior\"))\n  this.impl.controls.setClickBehavior(config);\n\n  if (this.clickHandler)\n  this.clickHandler.setClickBehavior(config);\n\n  if (config && config.disableMouseWheel) {\n    this.toolController.setMouseWheelInputEnabled(false);\n  }\n\n  if (config && config.disableTwoFingerSwipe) {\n    var gestureHandler = this.toolController.getTool(\"gestures\");\n    if (gestureHandler) {\n      gestureHandler.disableTwoFingerSwipe();\n    }\n  }\n};\n\n/**\n    * Searches the elements for the given text. When the search is complete,\n    * the callback onResultsReturned(idArray) is invoked.\n    * \n    * @param {string} text - The search term (not case sensitive).\n    * @param {Callbacks#onSearchSuccess} onSuccessCallback - Invoked when the search results are ready.\n    * @param {Callbacks#onGenericError} onErrorCallback - Invoke when an error occured during search.\n    * @param {string[]} [attributeNames] - Restricts search to specific attribute names.\n    * @param {Object} [options] - Search options.\n    * @param {boolean} [options.searchHidden=false] - Set to true to also search hidden properties\n    * @param {boolean} [options.includeInherited=false] - Set to true to include nodes that inherit the property\n    * @alias Autodesk.Viewing.Viewer3D#search\n    */\nViewer3D.prototype.search = function (text, onSuccessCallback, onErrorCallback, attributeNames)\n{var options = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : { searchHidden: false };\n  this.searchText = text;\n\n  if (this.model) {\n    this.model.search(text, onSuccessCallback, onErrorCallback, attributeNames, options);\n  } else\n  {\n    if (onErrorCallback)\n    onErrorCallback(ErrorCodes.BAD_DATA, \"Search failed since model does not exist\");\n  }\n};\n\n/**\n    * Returns an array of the IDs of the currently hidden nodes.\n    * When isolation is in place, there are no hidden nodes returned because\n    * all nodes that are not isolated are considered hidden.\n    * \n    * @param {Autodesk.Viewing.Model} [model] - Model object, if passed in the hidden nodes of the model are returned\n    *\n    * @returns {number[]} Array of nodes that are currently hidden, when no isolation is in place.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#getHiddenNodes\n    */\nViewer3D.prototype.getHiddenNodes = function (model) {\n  model = model || this.model;\n  return this.impl.visibilityManager.getHiddenNodes(model);\n};\n\n/**\n    * Returns an array of the IDs of the currently isolated nodes.\n    *\n    * Not yet implemented for 2D.\n    * \n    * @param {Autodesk.Viewing.Model} [model] - Model object, if passed in the isolated nodes of the model are returned\n    *\n    * @returns {number[]} Array of nodes that are currently isolated.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#getIsolatedNodes\n    */\nViewer3D.prototype.getIsolatedNodes = function (model) {\n  model = model || this.model;\n  if (model && model.is2d())\n  {\n    logger.warn(\"Viewer3D.getIsolatedNodes is not yet implemented for 2D\");\n    return [];\n  }\n\n  return this.impl.visibilityManager.getIsolatedNodes(model);\n};\n\n/**\n    * Isolates one of many sub-elements. You can pass in a node or an array of nodes to isolate.\n    * Pass in null to reset isolation.\n    *\n    * @param {number[]|number} node - A node ID or array of node IDs from the model tree {@link BaseViewer#getObjectTree}.\n    * @param {Autodesk.Viewing.Model} [model] - the model that contains the node id. Defaults to the first loaded model.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#isolate\n    */\nViewer3D.prototype.isolate = function (node, model)\n{\n  model = model || this.model;\n  if (!model) {\n    return;\n  }\n\n  var data = model.getData();\n  this.impl.visibilityManager.isolate(node, model);\n};\n\n\n/**\n    * Sets the background colors, which will be used to create a gradient.\n    * Values are in the range [0..255]\n    * \n    * @param {number} red\n    * @param {number} green\n    * @param {number} blue\n    * @param {number} red2\n    * @param {number} green2\n    * @param {number} blue2\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setBackgroundColor\n    */\nViewer3D.prototype.setBackgroundColor = function (red, green, blue, red2, green2, blue2)\n{\n  this.impl.setClearColors(red, green, blue, red2, green2, blue2);\n};\n\n/**\n    * Sets the background opacity. Value is in the range [0.0..1.0]\n    * \n    * @param {number} opacity\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setBackgroundOpacity\n    */\nViewer3D.prototype.setBackgroundOpacity = function (opacity)\n{\n  this.impl.setClearAlpha(opacity);\n};\n\n/**\n    * Toggles the selection for a given dbid.\n    * If it was unselected, it is selected.\n    * If it was selected, it is unselected.\n    *\n    * Currently three ways of node selection are supported:\n    * - Autodesk.Viewing.SelectionType.MIXED\n    *   - Leaf nodes are selected using the overlayed selection type, and inner nodes are selected using regular selection type.\n    * - Autodesk.Viewing.SelectionType.REGULAR\n    *   - Nodes are tinted with the selection color.\n    * - Autodesk.Viewing.SelectionType.OVERLAYED\n    *   - Nodes are tinted with the selection color and shown on top of the not selected geometry.\n    *\n    * Not yet implemented for 2D.\n    *\n    * @param {number} dbid\n    * @param {Autodesk.Viewing.Model} [model] - the model that contains the dbId. Uses the initial model loaded by default.\n    * @param {number} selectionType a member of Autodesk.Viewing.SelectionMode.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#toggleSelect\n    */\nViewer3D.prototype.toggleSelect = function (dbid, model, selectionType)\n{\n  model = model || this.model;\n  if (model && model.is2d())\n  {\n    // Fails because Model.getNodeById is not supported.\n    logger.warn(\"Viewer3D.toggleSelect is not yet implemented for 2D\");\n    return;\n  }\n\n  this.impl.selector.toggleSelection(dbid, model, selectionType);\n};\n\n/**\n   * Selects the array of ids. You can also pass in a single id instead of an array.\n   *\n   * Currently three ways of node selection are supported:\t\n   * - Autodesk.Viewing.SelectionType.MIXED\t\n   *   - Leaf nodes are selected using the overlayed selection type, and inner nodes are selected using regular selection type.\t\n   * - Autodesk.Viewing.SelectionType.REGULAR\t\n   *   - Nodes are tinted with the selection color.\t\n   * - Autodesk.Viewing.SelectionType.OVERLAYED\t\n   *   - Nodes are tinted with the selection color and shown on top of the not selected geometry.\n   * \n   * @param {number[]|number} dbids - element or array of elements to select.\n   * @param {Autodesk.Viewing.Model} [model] - the model instance containing the ids.\n   * @param {number} [selectionType] - a member of `Autodesk.Viewing.SelectionMode`.\n   * \n   * @alias Autodesk.Viewing.Viewer3D#select\n   */\nViewer3D.prototype.select = function (dbids, model, selectionType)\n{\n  if (typeof dbids === \"number\") {\n    dbids = [dbids];\n  }\n\n  model = model || this.model;\n  this.impl.selector.setSelection(dbids, model, selectionType);\n};\n\n\n/**\n    * Clears the selection.\n    * @alias Autodesk.Viewing.Viewer3D#clearSelection\n    */\nViewer3D.prototype.clearSelection = function ()\n{\n  this.impl.selector.clearSelection();\n};\n\n/**\n    * Returns information about the visibility of the current selection.\n    * @returns {object} `{hasVisible:boolean, hasHidden:boolean}`\n    * \n    * @alias Autodesk.Viewing.Viewer3D#getSelectionVisibility\n    */\nViewer3D.prototype.getSelectionVisibility = function () {\n  return this.impl.selector.getSelectionVisibility();\n};\n\n/**\n    * Returns the number of nodes in the current selection.\n    * @returns {number}\n    * @alias Autodesk.Viewing.Viewer3D#getSelectionCount\n    */\nViewer3D.prototype.getSelectionCount = function () {\n  return this.impl.selector.getSelectionLength();\n};\n\n/**\n    * Sets selection granularity mode. Supported values are:\n    * - Autodesk.Viewing.SelectionMode.LEAF_OBJECT\n    *   - Always select the leaf objects in the hierarchy.\n    * - Autodesk.Viewing.SelectionMode.FIRST_OBJECT\n    *   - For a given node, selects the first non-composite (layer, collection, model)\n    *   on the path from the root to the given node, and all children.\n    * - Autodesk.Viewing.SelectionMode.LAST_OBJECT\n    *   - For a given node, selects the nearest ancestor composite node and all children.\n    *   Selects the input node itself in case there is no composite node in the path to the root node.\n    * \n    * @param {number} mode - The selection mode.\n    * @alias Autodesk.Viewing.Viewer3D#setSelectionMode\n    */\nViewer3D.prototype.setSelectionMode = function (mode) {\n  this.prefs.set(Prefs3D.SELECTION_MODE, mode);\n};\n\n\n/**\n    * Returns the current selection.\n    * @returns {number[]} Array of the IDs of the currently selected nodes.\n    * @alias Autodesk.Viewing.Viewer3D#getSelection\n    */\nViewer3D.prototype.getSelection = function () {\n  return this.impl.selector.getSelection();\n};\n\n\n/**\n    * Locks the selection of specific `nodes` (dbIds) in a given model.\n    * The `nodes` will be unselected if the `lock` is set to true and the nodes are already selected.\n    * The locked nodes will not be selectable.\n    * @param {Number|Number[]} dbIds - dbIds to lock\n    * @param {Boolean} lock - true to lock, false otherwise\n    * @param {Autodesk.Viewing.Model} [model] - The model that contains the dbId. By default uses the initial model loaded into the scene.\n    * @alias Autodesk.Viewing.Viewer3D#lockSelection\n    */\nViewer3D.prototype.lockSelection = function (dbIds, lock, model) {\n  model = model || this.model;\n  this.impl.selector.lockSelection(dbIds, lock, model);\n};\n\n/**\n    * This function will unlock the specified `nodes` (dbIds) for a specific `model`.\n    * If the `nodes` parameter is omitted then the specified `model`'s locked nodes will be unlocked.\n    * If the `model` parameter is omitted then the specified `nodes` will be unlocked for the viewer.model.\n    * If both parameters are omitted then all of the models in the viewer will release their locked nodes.\n    * @param {Number[]} [dbIds] - dbIds to unlock\n    * @param {Autodesk.Viewing.Model} [model] - The model associated to the nodes parameters\n    * @alias Autodesk.Viewing.Viewer3D#unlockSelection\n    */\nViewer3D.prototype.unlockSelection = function (dbIds, model) {\n  this.impl.selector.unlockSelection(dbIds, model);\n};\n\n/**\n    * Checks whether selection is locked for a node\n    *\n    * @param {number} dbId - the object's identifier.\n    * @param {Autodesk.Viewing.Model} [model] - the model that contains the dbId. By default uses the initial model loaded into the scene.\n    * @return {boolean} True is the visibility is locked\n    * \n    * @alias Autodesk.Viewing.Viewer3D#isSelectionLocked\n    */\nViewer3D.prototype.isSelectionLocked = function (dbId, model) {\n  return this.impl.selector.isNodeSelectionLocked(dbId, model);\n};\n\n/**\n    * Returns the selected items from all loaded models.\n    * @param {function} [callback] - Optional callback to receive enumerated pairs of model and dbId\n    * for each selected object. If no callback is given, an array of objects is returned.\n    * @returns {object[]} An array of objects with a model and selectionSet properties for each model\n    * that has selected items in the scene.\n    * @alias Autodesk.Viewing.Viewer3D#getAggregateSelection\n    */\nViewer3D.prototype.getAggregateSelection = function (callback) {\n  var res = this.impl.selector.getAggregateSelection();\n\n  if (callback) {\n    for (var i = 0; i < res.length; i++) {\n      for (var j = 0; j < res[i].selection.length; j++) {\n        callback(res[i].model, res[i].selection[j]);\n      }\n    }\n  }\n\n  return res;\n};\n\n/**\n    * Returns the isolated items from all loaded models.\n    * \n    * @returns {object[]} An array of objects with a `model` and the isolated `ids` in that model.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#getAggregateIsolation\n    */\nViewer3D.prototype.getAggregateIsolation = function () {\n\n  var res = this.impl.visibilityManager.getAggregateIsolatedNodes();\n  return res;\n};\n\n/**\n    * Returns the hidden nodes for all loaded models.\n    * \n    * @returns {object[]} An array of objects with a `model` and the hidden `ids` in that model. \n    * \n    * @alias Autodesk.Viewing.Viewer3D#getAggregateHiddenNodes\n    */\nViewer3D.prototype.getAggregateHiddenNodes = function () {\n\n  var res = this.impl.visibilityManager.getAggregateHiddenNodes();\n  return res;\n};\n\n/**\n    * Ensures the passed in dbid / ids are hidden.\n    *\n    * @param {number[]|number} node - An array of dbids or just an id\n    * @param {Autodesk.Viewing.Model} [model] - The model that contains the dbId. By default uses the initial model loaded into the scene. \n    * \n    * @alias Autodesk.Viewing.Viewer3D#hide\n    */\nViewer3D.prototype.hide = function (node, model)\n{\n  model = model || this.model;\n  this.impl.visibilityManager.hide(node, model);\n};\n\n/**\n    * Ensures the passed in dbid / ids are shown.\n    *\n    * @param {number[]|number} node\n    * @param {Autodesk.Viewing.Model} [model] - The model that contains the dbId. By default uses the initial model loaded into the scene. \n    * \n    * @alias Autodesk.Viewing.Viewer3D#show\n    */\nViewer3D.prototype.show = function (node, model)\n{\n  model = model || this.model;\n  this.impl.visibilityManager.show(node, model);\n};\n\n/**\n    * Ensures everything is visible. Clears all node isolation (3D) and turns on all layers (2D).\n    * \n    * @alias Autodesk.Viewing.Viewer3D#showAll\n    *\n    * @fires Autodesk.Viewing#SHOW_ALL_EVENT\n    */\nViewer3D.prototype.showAll = function ()\n{\n  this.impl.visibilityManager.aggregateIsolate([]);\n  this.impl.layers.showAllLayers();\n  this.fireEvent({ type: et.SHOW_ALL_EVENT });\n};\n\n/**\n    * Toggles the visibility of the given node.\n    *\n    * Not yet implemented for 2D.\n    *\n    * @param {number} dbId - the object's identifier.\n    * @param {Autodesk.Viewing.Model} [model] - the model that contains the dbId. By default uses the initial model loaded into the scene.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#toggleVisibility\n    */\nViewer3D.prototype.toggleVisibility = function (dbId, model)\n{\n  this.impl.visibilityManager.toggleVisibility(dbId, model);\n};\n\n/**\n    * Returns true if every node is visible.\n    * @returns {boolean}\n    * \n    * @alias Autodesk.Viewing.Viewer3D#areAllVisible\n    */\nViewer3D.prototype.areAllVisible = function () {\n  return this.impl.isWholeModelVisible(this.model);\n};\n\n/**\n    * Returns true if the specified node is visible.\n    * The model argument is required only when in multi-model scenarios.\n    *\n    * @param {number} nodeId - Geometry node to check if visible.\n    * @param {Autodesk.Viewing.Model} [model] - The model that contains the specified ``nodeId``.\n    *\n    * @returns {boolean}\n    * \n    * @alias Autodesk.Viewing.Viewer3D#isNodeVisible\n    */\nViewer3D.prototype.isNodeVisible = function (nodeId, model) {\n  model = model || this.model;\n  return this.impl.isNodeVisible(nodeId, model);\n};\n\n/**\n    * Ensures the passed in dbid / ids are shown.\n    *\n    * @param {number[]|number} dbId\n    * @param {boolean} locked Set to true to lock the nodes visible. Set to false to allow the nodes to be hidden.\n    * @param {Autodesk.Viewing.Model} [model] - The model that contains the dbId. By default uses the initial model loaded into the scene. \n    * \n    * @alias Autodesk.Viewing.Viewer3D#show\n    */\nViewer3D.prototype.lockVisible = function (dbId, locked, model)\n{\n  model = model || this.model;\n  this.impl.visibilityManager.lockNodeVisible(dbId, locked, model);\n};\n\n/**\n    * Toggles the visibility of the given node.\n    *\n    * Not yet implemented for 2D.\n    *\n    * @param {number} dbId - the object's identifier.\n    * @param {Autodesk.Viewing.Model} [model] - the model that contains the dbId. By default uses the initial model loaded into the scene.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#toggleLockVisible\n    */\nViewer3D.prototype.toggleLockVisible = function (dbId, model)\n{\n  this.impl.visibilityManager.toggleVisibleLocked(dbId, model);\n};\n\n/**\n    * Checks whether visibility is locked for a node\n    *\n    * Not yet implemented for 2D.\n    *\n    * @param {number} dbId - the object's identifier.\n    * @param {Autodesk.Viewing.Model} [model] - the model that contains the dbId. By default uses the initial model loaded into the scene.\n    * @return {boolean} True is the visibility is locked\n    * \n    * @alias Autodesk.Viewing.Viewer3D#isVisibleLocked\n    */\nViewer3D.prototype.isVisibleLocked = function (dbId, model)\n{\n  return this.impl.visibilityManager.isNodeVisibleLocked(dbId, model);\n};\n\n/**\n    * Explodes the model from the center of gravity.\n    *\n    * Not applicable to 2D.\n    *\n    * @param {number} scale - A value from 0.0-1.0 to indicate how much to explode.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#explode\n    */\nViewer3D.prototype.explode = function (scale)\n{\n  if (!this.model)\n  return;\n\n  if (this.model.is2d())\n  {\n    logger.warn(\"Viewer3D.explode is not applicable to 2D\");\n    return;\n  }\n\n  var exploded = this.impl.explode(scale);\n  if (exploded) {\n    logger.track({ name: 'explode_count', aggregate: 'count' });\n  }\n};\n\n/**\n    * Returns the explode scale.\n    *\n    * Not applicable to 2D.\n    *\n    * @returns {number} - A value from 0.0-1.0 indicating how exploded the model is.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#getExplodeScale\n    */\nViewer3D.prototype.getExplodeScale = function ()\n{\n  if (this.model && this.model.is2d())\n  {\n    logger.warn(\"Viewer3D.getExplodeScale is not applicable to 2D\");\n    return 0;\n  }\n\n  return this.impl.getExplodeScale();\n};\n\n/**\n    * Lock dbid so it doesn't explode\n    *\n    * Not applicable to 2D.\n    *\n    * @param {number[]|number} dbids The dbids to lock or unlock\n    * @param {boolean} lock Set to true to prevent dbids from exploding. Set to false to allow dbids to explode.\n    * @param {Model} [model] The model containing the dbids. Defaults to this.model\n    * @returns {boolean} True if any dbids were changed.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#lockExplode\n    */\nViewer3D.prototype.lockExplode = function (dbids, lock, model)\n{\n  model = model || this.model;\n  if (model && model.is2d())\n  {\n    logger.warn(\"Viewer3D.lockExplode is not applicable to 2D\");\n    return 0;\n  }\n\n  return this.impl.lockExplode(dbids, lock, model);\n};\n\n/**\n    * Check whether a dbid is locked so it doesn't explode.\n    *\n    * Not applicable to 2D.\n    *\n    * @param {number} dbid The dbid to check\n    * @param {Model} [model] The model containing the dbids. Defaults to this.model\n    * @returns {boolean} True if dbid is locked to prevent explode\n    * \n    * @alias Autodesk.Viewing.Viewer3D#isExplodeLocked\n    */\nViewer3D.prototype.isExplodeLocked = function (dbid, model)\n{\n  model = model || this.model;\n  if (model && model.is2d())\n  {\n    logger.warn(\"Viewer3D.isExplodeLocked is not applicable to 2D\");\n    return 0;\n  }\n\n  return this.impl.isExplodeLocked(dbid, model);\n};\n\n/**\n    * Toggle dbid lock so it doesn't explode\n    *\n    * Not applicable to 2D.\n    *\n    * @param {number} dbid The dbid to lock or unlock\n    * @param {Model} [model] The model containing the dbids. Defaults to this.model\n    * @returns {boolean} True if any dbids were changed.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#toggleLockExplode\n    */\nViewer3D.prototype.toggleLockExplode = function (dbid, model)\n{\n  model = model || this.model;\n  if (model && model.is2d())\n  {\n    logger.warn(\"Viewer3D.toggleLockExplode is not applicable to 2D\");\n    return 0;\n  }\n\n  return this.impl.lockExplode(dbid, !this.isExplodeLocked(dbid, model), model);\n};\n\n\n/**\n    * Enables or disables the high quality rendering settings.\n    *\n    * Not applicable to 2D.\n    *\n    * @param {boolean} useSAO - True or false to enable screen space ambient occlusion.\n    * @param {boolean} useFXAA - True or false to enable fast approximate anti-aliasing.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setQualityLevel\n    */\nViewer3D.prototype.setQualityLevel = function (useSAO, useFXAA)\n{\n  if (this.model && this.model.is2d())\n  {\n    logger.warn(\"Viewer3D.setQualityLevel is not applicable to 2D\");\n    return;\n  }\n\n  this.prefs.set(Prefs3D.AMBIENT_SHADOWS, useSAO);\n  this.prefs.set(Prefs3D.ANTIALIASING, useFXAA);\n};\n\n\n/**\n    * Toggles ghosting during search and isolate.\n    *\n    * Not applicable to 2D.\n    *\n    * @param {boolean} value - Indicates whether ghosting is on or off.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setGhosting\n    */\nViewer3D.prototype.setGhosting = function (value)\n{\n  if (this.model && this.model.is2d())\n  {\n    logger.warn(\"Viewer3D.setGhosting is not applicable to 2D\");\n    return;\n  }\n\n  this.prefs.set(Prefs3D.GHOSTING, value);\n};\n\n/**\n    * Toggles ground shadow.\n    *\n    * Not applicable to 2D.\n    *\n    * @param {boolean} value - Indicates whether shadow is on or off.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setGroundShadow\n    */\nViewer3D.prototype.setGroundShadow = function (value)\n{\n  if (this.model && this.model.is2d())\n  {\n    logger.warn(\"Viewer3D.setGroundShadow is not applicable to 2D\");\n    return;\n  }\n\n  this.prefs.set(Prefs3D.GROUND_SHADOW, value);\n};\n\n/**\n    * Toggles ground reflection.\n    *\n    * Not applicable to 2D.\n    *\n    * @param {boolean} value - Indicates whether reflection is on or off.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setGroundReflection\n    */\nViewer3D.prototype.setGroundReflection = function (value)\n{\n  if (this.model && this.model.is2d())\n  {\n    logger.warn(\"Viewer3D.setGroundReflection is not applicable to 2D\");\n    return;\n  }\n\n  this.prefs.set(Prefs3D.GROUND_REFLECTION, value);\n};\n\n/**\n    * Toggles environment map for background.\n    *\n    * Not applicable to 2D.\n    *\n    * @param {boolean} value - Indicates whether environment map for background is on or off.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setEnvMapBackground\n    */\nViewer3D.prototype.setEnvMapBackground = function (value)\n{\n  if (this.model && this.model.is2d())\n  {\n    logger.warn(\"Viewer3D.setEnvMapBackground is not applicable to 2D\");\n    return;\n  }\n\n  this.prefs.set(Prefs3D.ENV_MAP_BACKGROUND, value);\n};\n\n/**\n    * Toggles first person tool popup.\n    *\n    * Not applicable to 2D.\n    *\n    * @param {boolean} value - Indicates whether first person tool popup is showed or not.\n    */\nViewer3D.prototype.setFirstPersonToolPopup = function (value)\n{\n  if (this.model && this.model.is2d())\n  {\n    logger.warn(\"Viewer3D.setFirstPersonToolPopup is not applicable to 2D\");\n    return;\n  }\n\n  this.prefs.set(Prefs3D.FIRST_PERSON_TOOL_POPUP, value);\n};\n\n/**\n    * Returns the state of First Person Walk tool popup\n    *\n    * Not applicable to 2D.\n    *\n    * @returns {boolean} true if the First Person Walk tool popup appears, false if the First Person Walk tool popup does not appear.\n    * \n    */\nViewer3D.prototype.getFirstPersonToolPopup = function ()\n{\n  if (this.model && this.model.is2d())\n  {\n    logger.warn(\"Viewer3D.getFirstPersonToolPopup is not applicable to 2D\");\n    return;\n  }\n\n  return this.prefs.firstPersonToolPopup;\n};\n\n/**\n    * Toggles the bimwalk tool popup.\n    *\n    * Not applicable to 2D.\n    *\n    * @param {boolean} value - Indicates whether first person tool popup is showed or not.\n    * \n    */\nViewer3D.prototype.setBimWalkToolPopup = function (value)\n{\n  if (this.model && this.model.is2d())\n  {\n    logger.warn(\"Viewer3D.setBimWalkToolPopup is not applicable to 2D\");\n    return;\n  }\n\n  this.prefs.set(Prefs3D.BIM_WALK_TOOL_POPUP, value);\n};\n\n/**\n    * Returns the state of First Person Walk tool popup\n    *\n    * Not applicable to 2D.\n    *\n    * @returns {boolean} true if the First Person Walk tool popup appears, false if the First Person Walk tool popup does not appear.\n    */\nViewer3D.prototype.getBimWalkToolPopup = function ()\n{\n  if (this.model && this.model.is2d())\n  {\n    logger.warn(\"Viewer3D.getBimWalkToolPopup is not applicable to 2D\");\n    return;\n  }\n\n  return this.prefs.bimWalkToolPopup;\n};\n\n/**\n    * Toggles whether progressive rendering is used. Warning: turning progressive rendering off\n    * will have serious performance implications.\n    * @param {boolean} value whether it is on or off\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setProgressiveRendering\n    */\nViewer3D.prototype.setProgressiveRendering = function (value)\n{\n  this.prefs.set(Prefs.PROGRESSIVE_RENDERING, value);\n};\n\n/**\n    * Overrlides line colors in 2D models to render in shades of gray.\n    * Applies only to 2D models.\n    * \n    * @param {boolean} value \n    * \n    * @alias Autodesk.Viewing.Viewer3D#setGrayscale\n    */\nViewer3D.prototype.setGrayscale = function (value)\n{\n  if (this.model && this.model.is3d()) {\n    logger.warn(\"Viewer3D.setGrayscale is not applicable to 3D\");\n    return;\n  }\n  this.prefs.set(Prefs2D.GRAYSCALE, value);\n};\n\n/**\n    * AutoCAD drawings are commonly displayed with white lines on a black background. Setting reverse swaps (just)\n    * these two colors.\n    * @param {boolean} value whether it is on or off\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setSwapBlackAndWhite\n    */\nViewer3D.prototype.setSwapBlackAndWhite = function (value)\n{\n  if (this.model && this.model.is3d()) {\n    logger.warn(\"Viewer3D.setSwapBlackAndWhite is not applicable to 3D\");\n    return;\n  }\n  this.prefs.set(Prefs2D.SWAP_BLACK_AND_WHITE, value);\n};\n\n/**\n    * Toggles whether the navigation should be optimized for performance. If set\n    * to true, anti-aliasing and ambient shadows will be off while navigating.\n    *\n    * Not applicable to 2D.\n    *\n    * @param {boolean} value whether it is on or off\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setOptimizeNavigation\n    */\nViewer3D.prototype.setOptimizeNavigation = function (value)\n{\n  if (this.model && this.model.is2d())\n  {\n    logger.warn(\"Viewer3D.setOptimizeNaviation is not applicable to 2D\");\n    return;\n  }\n\n  this.prefs.set(Prefs3D.OPTIMIZE_NAVIGATION, value);\n};\n\n/**\n    * Registers rendering callbacks with preferences.\n    * @private\n    */\nViewer3D.prototype.initializePrefListeners = function () {var _this5 = this;\n  this.prefs.addListeners(Prefs.KEY_MAP_CMD, function (value) {\n    _this5.impl.toggleCmdMapping(value, _this5.toolController);\n  });\n\n  this.prefs.addListeners(Prefs3D.ANTIALIASING, function (value) {\n    var useSAO = _this5.prefs.get(Prefs3D.AMBIENT_SHADOWS);\n    _this5.impl.togglePostProcess(useSAO, value);\n  });\n\n  this.prefs.addListeners(Prefs3D.AMBIENT_SHADOWS, function (value) {\n    var useFXAA = _this5.prefs.get(Prefs3D.ANTIALIASING);\n    _this5.impl.togglePostProcess(value, useFXAA);\n  });\n\n  this.prefs.addListeners(Prefs3D.GROUND_SHADOW, function (value) {\n    _this5.impl.toggleGroundShadow(value);\n  });\n\n  this.prefs.addListeners(Prefs3D.GROUND_REFLECTION, function (value) {\n    _this5.impl.toggleGroundReflection(value);\n  });\n\n  this.prefs.addListeners(Prefs3D.ENV_MAP_BACKGROUND, function (value) {\n    _this5.impl.toggleEnvMapBackground(value);\n  });\n\n  this.prefs.addListeners(Prefs.PROGRESSIVE_RENDERING, function (value) {\n    _this5.impl.toggleProgressive(value);\n  });\n\n  this.prefs.addListeners(Prefs3D.VIEW_TYPE, function (value) {\n    var curView = _this5.prefs.get(Prefs3D.VIEW_TYPE);\n\n    var camera = _this5.impl.getModelCamera(_this5.model);\n    if (camera) {\n      var isPerspective = camera.isPerspective;\n      // Update the default view from the model's stored camera.\n      if (!isNaN(isPerspective)) {\n        var defaultValue = isPerspective ? VIEW_TYPES.PERSPECTIVE : VIEW_TYPES.ORTHOGRAPHIC;\n        _this5.prefs.setDefault(Prefs3D.VIEW_TYPE, defaultValue);\n        if (curView === VIEW_TYPES.DEFAULT) _this5.prefs[Prefs3D.VIEW_TYPE] = defaultValue;\n      }\n    }\n    _this5.autocam.setViewType(value);\n  });\n\n  this.prefs.addListeners(Prefs2D.GRAYSCALE, function (value) {\n    _this5.impl.toggleGrayscale(value);\n  });\n\n  this.prefs.addListeners(Prefs2D.SWAP_BLACK_AND_WHITE, function (value) {\n    _this5.impl.toggleSwapBlackAndWhite(value);\n  });\n\n  this.prefs.addListeners(Prefs3D.OPTIMIZE_NAVIGATION, function (value) {\n    _this5.impl.setOptimizeNavigation(value);\n  });\n\n  this.prefs.addListeners(Prefs3D.GHOSTING, function (value) {\n    _this5.impl.toggleGhosting(value);\n  });\n\n  this.prefs.addListeners(Prefs3D.LINE_RENDERING, function (value) {\n    _this5.impl.hideLines(!value);\n  });\n\n  this.prefs.addListeners(Prefs.POINT_RENDERING, function (value) {\n    _this5.impl.hidePoints(!value);\n  });\n\n  this.prefs.addListeners(Prefs3D.EDGE_RENDERING, function (value) {\n    _this5._displayEdges = function () {\n      _this5.impl.setDisplayEdges(value);\n    };\n    // LMV-5390: Make sure that the model object is created before calling the setDisplayEdges.\n    // This method expects the model is initialized when setting the PolygonOffset.\n    if (!value && (!_this5.model || !_this5.model.isLoadDone())) {\n      // This event listener will be removed in the uninitialize function.\n      // That is because the initializePrefListeners is called only once when the viewer is initialized.\n      // The displayEdges needs to be called for every model that is loaded.\n      _this5.addEventListener(et.GEOMETRY_LOADED_EVENT, _this5._displayEdges);\n    } else {\n      _this5._displayEdges();\n    }\n  });\n\n  this.prefs.addListeners(Prefs3D.LIGHT_PRESET, function (value) {\n    var force = false;\n    if (typeof value === 'string') {\n      // find the index value\n      var presetName = value;\n      var idx = -1;\n      for (var i = 0; i < LightPresets.length; i++) {\n        if (LightPresets[i].name === presetName) {\n          idx = i;\n          break;\n        }\n      }\n      if (idx === -1) {\n        // Force the default light preset for envirnments that are not defined in LightPresets.\n        logger.warn('Invalid Prefs3D.LIGHT_PRESET: ' + value);\n        logger.warn('Setting to default light preset.');\n        force = true;\n      }\n      value = idx;\n    }\n    _this5.impl.setLightPreset(value, force);\n  });\n\n  this.prefs.addListeners(Prefs3D.ALWAYS_USE_PIVOT, function (value) {\n    _this5.navigation.setUsePivotAlways(value);\n  });\n\n  this.prefs.addListeners(Prefs.REVERSE_MOUSE_ZOOM_DIR, function (value) {\n    _this5.navigation.setReverseZoomDirection(value);\n  });\n\n  this.prefs.addListeners(Prefs3D.REVERSE_HORIZONTAL_LOOK_DIRECTION, function (value) {\n    _this5.navigation.setReverseHorizontalLookDirection(value);\n  });\n\n  this.prefs.addListeners(Prefs3D.REVERSE_VERTICAL_LOOK_DIRECTION, function (value) {\n    _this5.navigation.setReverseVerticalLookDirection(value);\n  });\n\n  this.prefs.addListeners(Prefs3D.ZOOM_TOWARDS_PIVOT, function (value) {\n    _this5.navigation.setZoomTowardsPivot(value);\n  });\n\n  this.prefs.addListeners(Prefs3D.SELECTION_SETS_PIVOT, function (value) {\n    _this5.navigation.setSelectionSetsPivot(value);\n  });\n\n  this.prefs.addListeners(Prefs3D.ORBIT_PAST_WORLD_POLES, function (value) {\n    _this5.navigation.setOrbitPastWorldPoles(value);\n  });\n\n  this.prefs.addListeners(Prefs.LEFT_HANDED_MOUSE_SETUP, function (value) {\n    _this5.navigation.setUseLeftHandedInput(value);\n    EventUtils.setUseLeftHandedInput(value);\n  });\n\n  this.prefs.addListeners(Prefs.WHEEL_SETS_PIVOT, function (value) {\n    _this5.navigation.setWheelSetsPivot(value);\n  });\n\n  this.prefs.addListeners(Prefs3D.SELECTION_MODE, function (mode) {\n    _this5.impl.selector.setSelectionMode(mode);\n  });\n\n  this.prefs.addListeners(Prefs.BACKGROUND_COLOR_PRESET, function (bacStr) {\n    if (bacStr) {\n      try {\n        var bac = JSON.parse(bacStr);\n        _this5.impl.setClearColors(bac[0], bac[1], bac[2], bac[3], bac[4], bac[5]);\n      } catch (e) {\n        logger.warn('Invalid Prefs.BACKGROUND_COLOR_PRESET: ' + bac);\n      }\n    }\n  });\n\n  this.prefs.addListeners(Prefs3D.EXPLODE_STRATEGY, function (strategy) {\n    if (ModelExploder.setStrategy(strategy)) {\n      _this5.impl.refreshExplode();\n    }\n  });\n\n  this.prefs.addListeners(Prefs2D.LOADING_ANIMATION, function (value) {\n    _this5.impl.onLoadingAnimationChanged(value);\n  });\n\n  var prevDoubleSided = {};\n  // LMV-5379 - add preference to turn double sided materials on and off\n  // If the value is a boolean, all of the models will get their materials toggled.\n  // The value can also be an object, where the key is the model id and the value is the flag \n  // that is used to turn on and off the model's double sided materials.\n  this.prefs.addListeners(Prefs3D.FORCE_DOUBLE_SIDED, function (value) {\n    // Returns true if the model's materials needs to be update.\n    function getEnableFlag(model) {\n      if (typeof value === 'boolean') {\n        return value;\n      }\n      return !!value[model.id];\n    }\n\n    _this5._setDoubleSided = function (event) {var update = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : true;\n      var model = event.model;\n      var enable = getEnableFlag(model);\n      var modelData = model.getData();\n      if (!prevDoubleSided.hasOwnProperty(model.id)) {\n        prevDoubleSided[model.id] = !!modelData.doubleSided;\n      }\n\n      // Use the model's doubleSided flag if the value is set to false.\n      // NOTE: this means that if the model has the doubleSided flag set to true,\n      // this preference will not turn off double sided materials.\n      var isDoubleSided = enable || !!modelData.doubleSided;\n      if (isDoubleSided !== prevDoubleSided[model.id]) {\n        _this5.impl.setDoubleSided(isDoubleSided, model, update);\n        prevDoubleSided[model.id] = isDoubleSided;\n      }\n    };\n\n    var models = _this5.impl.modelQueue().getModels();\n    if (models.length === 0) {\n      // Add an event listener\n      _this5.addEventListener(et.MODEL_ADDED_EVENT, _this5._setDoubleSided);\n    } else {\n      models.forEach(function (model) {\n        _this5._setDoubleSided({ model: model }, false);\n      });\n      _this5.impl.sceneUpdated();\n    }\n  });\n};\n\n/**\n    * Locks or unlocks navigation controls.\n    *\n    * When navigation is locked, certain operations (for example, orbit, pan, or fit-to-view)\n    * are disabled.\n    *\n    * @param {boolean} value True if the navigation should be locked.\n    * @returns {boolean} The previous state of the lock (this may be used to restore the lock to it's previous state).\n    *\n    * @see {@link Autodesk.Viewing.Viewer3D#setNavigationLockSettings}\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setNavigationLock\n    */\nViewer3D.prototype.setNavigationLock = function (value)\n{\n  var prev = this.navigation.getIsLocked();\n  if (prev !== value) {\n    this.navigation.setIsLocked(value);\n    this.dispatchEvent({ type: et.NAVIGATION_MODE_CHANGED_EVENT, id: this.getActiveNavigationTool() });\n  }\n\n  return prev;\n};\n\n/**\n    * Gets the current state of the navigation lock.\n    * @returns {boolean} True if the navigation controls are currently locked.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#getNavigationLock\n    */\nViewer3D.prototype.getNavigationLock = function ()\n{\n  return this.navigation.getIsLocked();\n};\n\n/**\n    * Updates the configuration of the navigation lock,\n    * i.e., which actions are available when navigation is locked.\n    *\n    * The configurable actions are 'orbit', 'pan', 'zoom', 'roll', 'fov', 'walk', or 'gotoview'.\n    * By default, none of the actions are enabled when the navigation is locked.\n    *\n    * @param {object} settings Map of <action>:<boolean> pairs specifying\n    * whether the given action is *enabled* even when the navigation is locked.\n    *\n    * @see {@link Autodesk.Viewing.Viewer3D#setNavigationLock}\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setNavigationLockSettings\n    */\nViewer3D.prototype.setNavigationLockSettings = function (settings)\n{\n  this.navigation.setLockSettings(settings);\n  this.dispatchEvent({ type: et.NAVIGATION_MODE_CHANGED_EVENT, id: this.getActiveNavigationTool() });\n};\n\n/**\n    * Gets the current configuration of the navigation lock.\n    *  @returns {object} Map of <action>:<boolean> pairs specifying\n    * whether the given action is *enabled* even when the navigation is locked.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#getNavigationLockSettings\n    */\nViewer3D.prototype.getNavigationLockSettings = function ()\n{\n  return this.navigation.getLockSettings();\n};\n\n/**\n    * Swaps the current navigation tool for the tool with the provided name.\n    * Will trigger NAVIGATION_MODE_CHANGED event if the mode actually changes.\n    *\n    * @param {string} [toolName] - The name of the tool to activate. By default it will switch to the default tool.\n    *\n    * @returns {boolean} - True if the tool was set successfully. False otherwise.\n    *\n    * @see {@link Viewer3D#getActiveNavigationTool|getActiveNavigationTool()}\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setActiveNavigationTool\n    */\nViewer3D.prototype.setActiveNavigationTool = function (toolName)\n{\n\n  if (toolName === this._pushedTool || !toolName && !this._pushedTool)\n  return true;\n\n\n  if (this._pushedTool) {\n\n    if (!this.impl.controls.deactivateTool(this._pushedTool)) {\n      return false;\n    }\n\n    // Need to reset the activeName of the default tool, since \"orbit\",\n    // \"freeorbit\", \"dolly\" and \"pan\" share the same instance.\n    this.impl.controls.setToolActiveName(this.getDefaultNavigationToolName());\n    this._pushedTool = null;\n  }\n\n  var isDefault = !toolName || toolName === this.getDefaultNavigationToolName();\n\n  if (isDefault && this._pushedTool === null) {\n    this.dispatchEvent({ type: et.NAVIGATION_MODE_CHANGED_EVENT, id: this.getDefaultNavigationToolName() });\n    return true;\n  }\n\n  if (this.impl.controls.activateTool(toolName)) {\n    this._pushedTool = toolName;\n    this.dispatchEvent({ type: et.NAVIGATION_MODE_CHANGED_EVENT, id: this._pushedTool });\n    return true;\n  }\n\n  return false;\n};\n\n/**\n    * Returns the name of the active navigation tool.\n    * @returns {string} - The tool's name.\n    *\n    * @see {@link Viewer3D#setActiveNavigationTool|setActiveNavigationTool()}\n    * \n    * @alias Autodesk.Viewing.Viewer3D#getActiveNavigationTool\n    */\nViewer3D.prototype.getActiveNavigationTool = function ()\n{\n  return this._pushedTool ? this._pushedTool : this._defaultNavigationTool;\n};\n\n/**\n    * Sets the default navigation tool. This tool will always sit beneath the navigation tool on the tool stack.\n    *\n    * @param {string} toolName - The name of the new default navigation tool.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setDefaultNavigationTool\n    */\nViewer3D.prototype.setDefaultNavigationTool = function (toolName)\n{\n  if (this._defaultNavigationTool) {\n    this.impl.controls.deactivateTool(this._defaultNavigationTool);\n  }\n\n  var pushed = this._pushedTool;\n  this._pushedTool = null;\n  if (pushed) {\n    this.impl.controls.deactivateTool(pushed);\n  }\n\n  this.impl.controls.activateTool(toolName);\n  this._defaultNavigationTool = toolName;\n\n  if (pushed) {\n    this.impl.controls.activateTool(pushed);\n    this._pushedTool = pushed;\n  }\n};\n\n/**\n    * Returns the default navigation tool\n    *\n    * @returns {Object} - The default navigation tool.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#getDefaultNavigationToolName\n    */\nViewer3D.prototype.getDefaultNavigationToolName = function ()\n{\n  return this._defaultNavigationTool;\n};\n\n/**\n    * Gets the current camera vertical field of view.\n    * @returns { number } - the field of view in degrees.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#getFOV\n    */\nViewer3D.prototype.getFOV = function ()\n{\n  return this.navigation.getVerticalFov();\n};\n\n/**\n    * Sets the current cameras vertical field of view.\n    * @param { number } degrees - Field of view in degrees.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setFOV\n    */\nViewer3D.prototype.setFOV = function (degrees)\n{\n  this.navigation.setVerticalFov(degrees, true);\n};\n\n/**\n    * Gets the current camera focal length.\n    * @returns { number } - the focal length in millimetres.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#getFocalLength\n    */\nViewer3D.prototype.getFocalLength = function ()\n{\n  return this.navigation.getFocalLength();\n};\n\n/**\n    * Sets the current cameras focal length.\n    * @param { number } mm - Focal length in millimetres\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setFocalLength\n    */\nViewer3D.prototype.setFocalLength = function (mm)\n{\n  this.navigation.setFocalLength(mm, true);\n};\n\n/**\n    * Hides all lines in the scene.\n    * @param {boolean} hide\n    * \n    * @alias Autodesk.Viewing.Viewer3D#hideLines\n    */\nViewer3D.prototype.hideLines = function (hide) {\n  if (this.model && this.model.is2d()) {\n    logger.warn(\"Viewer3D.hideLines is not applicable to 2D\");\n    return;\n  }\n  this.prefs.set(Prefs3D.LINE_RENDERING, !hide);\n};\n\n/**\n    * Hides all points in the scene.\n    * @param {boolean} hide\n    * \n    * @alias Autodesk.Viewing.Viewer3D#hidePoints\n    */\nViewer3D.prototype.hidePoints = function (hide) {\n  this.prefs.set(Prefs.POINT_RENDERING, !hide);\n};\n\n/**\n    * Turns edge topology display on/off (where available).\n    * @param {boolean} show - true to turn edge topology display on, false to turn edge topology display off.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setDisplayEdges\n    */\nViewer3D.prototype.setDisplayEdges = function (show) {\n  if (this.model && this.model.is2d()) {\n    logger.warn(\"Viewer3D.setDisplayEdges is not applicable to 2D\");\n    return;\n  }\n  this.prefs.set(Prefs3D.EDGE_RENDERING, show);\n};\n\n/**\n    * @deprecated\n    * Applies the camera to the current viewer's camera.\n    * @param {THREE.Camera} camera - the camera to apply.\n    * @param {boolean} [fit=false] - Do a fit to view after transition.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#applyCamera\n    */\nViewer3D.prototype.applyCamera = function (camera, fit) {\n  this.impl.setViewFromCamera(camera, true);\n  if (fit)\n  this.fitToView();\n};\n\n/**\n    * Fits camera to objects by ID. It fits the entire model if no ID is provided.\n    * Operation will fit to the model's bounding box when its object tree is not available.\n    *\n    * @param {number[]|null} [objectIds=null] array of Ids to fit into the view. Avoid passing this value to fit the entire model.\n    * @param {Autodesk.Viewing.Model|null} [model] - The model containing the ``objectIds``. If falsey, the viewer's current model will be used.\n    * @param {boolean} [immediate=false] - true to avoid the default transition.\n    * \n    * @fires Autodesk.Viewing#FIT_TO_VIEW_EVENT\n    * @fires Autodesk.Viewing#AGGREGATE_FIT_TO_VIEW_EVENT\n    * \n    * @alias Autodesk.Viewing.Viewer3D#fitToView\n    */\nViewer3D.prototype.fitToView = function (objectIds, model, immediate) {\n\n  var selection = [];\n  if (objectIds) {\n    if (objectIds.length > 0 && objectIds[0].model) {\n      // Aggregated selection being passed in.\n      selection = objectIds;\n    } else if (objectIds.length > 0) {\n      // Backwards compatibility interface for single model.\n      selection.push({\n        model: model || this.model,\n        selection: objectIds });\n\n    }\n  }\n\n  this.impl.fitToView(selection, immediate);\n  // Event gets fired from `impl`\n};\n\n/**\n    * Modifies a click action configuration entry.\n    * @param {string} what - which click config to modify (one of \"click\", \"clickAlt\", \"clickCtrl\", \"clickShift\", \"clickCtrlShift\").\n    * @param {string} where - hit location selector (one of \"onObject\", \"offObject\").\n    * @param {string[]} newAction - action list (containing any of \"setCOI\", \"selectOnly\", \"selectToggle\", \"deselectAll\", \"deselectAll\", \"isolate\", \"showAll\", \"hide\", \"focus\").\n    * @returns {boolean} False if specified entry is not found, otherwise true.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setClickConfig\n    */\nViewer3D.prototype.setClickConfig = function (what, where, newAction) {\n  var config = this.clickHandler ? this.clickHandler.getClickBehavior() :\n  this.impl.controls.getClickBehavior();\n\n  if (what in config)\n  {\n    var actions = config[what];\n    if (where in actions)\n    {\n      actions[where] = newAction;\n      return true;\n    }\n  }\n  return false;\n};\n\n/**\n    * Fetch a click action configuration entry.\n    * @param {string} what - which click config to fetch (one of \"click\", \"clickAlt\", \"clickCtrl\", \"clickShift\", \"clickCtrlShift\").\n    * @param {string} where - hit location selector (one of \"onObject\", \"offObject\").\n    * @returns {array} action list for the given entry or null if not found.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#getClickConfig\n    */\nViewer3D.prototype.getClickConfig = function (what, where)\n{\n  var config = this.clickHandler ? this.clickHandler.getClickBehavior() :\n  this.impl.controls.getClickBehavior();\n\n  if (what in config)\n  {\n    var actions = config[what];\n    if (where in actions)\n    return actions[where];\n  }\n  return null;\n};\n\n/**\n    * Modify the default click behaviour for the viewer.\n    * @param {boolean} state - If true the default is to set the center of interest. If false the default is single select.\n    * @param {boolean} [updatePrefs=true] - If true, the user preferences will be updated.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setClickToSetCOI\n    */\nViewer3D.prototype.setClickToSetCOI = function (state, updatePrefs)\n{\n  // Typically, the set{Blah} functions set a preference. This function will set the preference and then call an internal API.\n  if (updatePrefs !== false)\n  this.prefs.set(Prefs3D.CLICK_TO_SET_COI, state);\n\n  var currentOn = this.getClickConfig(\"click\", \"onObject\");\n  if (state)\n  {\n    if (currentOn.indexOf(\"setCOI\") === -1) // Not already set?\n      {\n        this.setClickConfig(\"click\", \"onObject\", [\"setCOI\"]);\n      }\n  } else\n  if (currentOn.indexOf(\"setCOI\") >= 0) // Is currently set?\n    {\n      this.setClickConfig(\"click\", \"onObject\", [\"selectOnly\"]);\n    }\n};\n\n/**\n    * Updates viewer settings encapsulated witihn a Profile.\n    * This method will also load and unload extensions referenced by the Profile.\n    * \n    * @example\n    *   const profileSettings = {\n    *      name: \"mySettings\",\n    *      settings: {\n    *          ambientShadows: false,\n    *          groundShadows: true\n    *      }\n    *      extensions: {\n    *          load: [],   // Extension IDs \n    *          unload: []  // Extension IDs\n    *      }\n    *   }\n    *   const profile = new Autodesk.Viewing.Profile(profileSettings);\n    *   viewer.setProfile(profile);\n    *\n    * @param {Autodesk.Viewing.Profile} profile - profile containing settings.\n    * @param {boolean} [override] - If set to true this will override all existing preference with the new profile preference. Default: true\n    *\n    * @alias Autodesk.Viewing.Viewer3D#setProfile\n    */\nViewer3D.prototype.setProfile = function (profile, override) {var _this6 = this;\n\n  if (!profile)\n  return false;\n\n  this.profile = profile;\n  this.profile.apply(this.prefs, override);\n\n  var toUnload = this.profile.extensions && this.profile.extensions.unload || [];\n  var toLoad = this.profile.extensions && this.profile.extensions.load || [];\n\n  toUnload.forEach(function (extId) {\n    if (_this6.isExtensionLoaded(extId)) {\n      _this6.unloadExtension(extId);\n    }\n  });\n\n  toLoad.forEach(function (extId) {\n    if (!_this6.isExtensionLoaded(extId)) {\n      _this6.loadExtension(extId, _this6.config);\n    }\n  });\n  this.dispatchEvent({ type: Autodesk.Viewing.PROFILE_CHANGE_EVENT, profile: profile });\n};\n\n/**\n    * DEPRECATED. DO NO USE.\n    * REMOVE IN v8.0\n    * @private\n    * @deprecated\n    */\nViewer3D.prototype.initSettings = function (settings) {\n\n  // Initialize the profile only if the viewer.profile is not set.\n  // This will insure that the loadModel model functions sets the settings once.\n  if (!this.profile) {\n    var profile = new Profile(settings);\n    this.setProfile(profile);\n  }\n};\n\n/**\n    * Sets the Light Presets (Environments) for the Viewer.\n    *\n    * Not applicable to 2D.\n    *\n    * Sets the preference in the UI\n    * @param {Number} index - where\n    * - 0 Simple Grey\n    * - 1 Sharp Highlights\n    * - 2 Dark Sky\n    * - 3 Grey Room\n    * - 4 Photo Booth\n    * - 5 Tranquility\n    * - 6 Infinity Pool\n    * - 7 Simple White\n    * - 8 Riverbank\n    * - 9 Contrast\n    * - 10 Rim Highlights\n    * - 11 Cool Light\n    * - 12 Warm Light\n    * - 13 Soft Light\n    * - 14 Grid Light\n    * - 15 Plaza\n    * - 16 Snow Field\n    * @note this list is copied from the ones in Environments.js\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setLightPreset\n    */\nViewer3D.prototype.setLightPreset = function (index) {\n  if (this.model && this.model.is2d())\n  {\n    logger.warn(\"Viewer3D.setLightPreset is not applicable to 2D\");\n    return;\n  }\n\n  this.prefs.set(Prefs3D.LIGHT_PRESET, index);\n};\n\n/**\n    *  Set or unset a view navigation option which requests that orbit controls always orbit around the currently set pivot point.\n    *\n    *  Sets the preference in the UI\n    *  @param {boolean} value - value of the option, true to request use of the pivot point. When false some controls may pivot around the center of the view. (Currently applies only to the view-cube orbit controls.)\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setUsePivotAlways\n    */\nViewer3D.prototype.setUsePivotAlways = function (value) {\n  if (this.model && this.model.is2d()) {\n    logger.warn(\"Viewer3D.setUsePivotAlways is not applicable to 2D\");\n    return;\n  }\n  this.prefs.set(Prefs3D.ALWAYS_USE_PIVOT, value);\n};\n\n/**\n    * Set or unset a view navigation option to reverse the default direction for camera dolly (zoom) operations.\n    *\n    *  Sets the preference in the UI\n    *  @param {boolean} value - value of the option, true for reverse, false for default\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setReverseZoomDirection\n    */\nViewer3D.prototype.setReverseZoomDirection = function (value) {\n  this.prefs.set(Prefs.REVERSE_MOUSE_ZOOM_DIR, value);\n};\n\n/**\n    * Set or unset a view navigation option to reverse the default direction for horizontal look operations.\n    *\n    * Not applicable to 2D.\n    *\n    *  Sets the preference in the UI\n    *  @param {boolean} value - value of the option, true for reverse, false for default\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setReverseHorizontalLookDirection\n    */\nViewer3D.prototype.setReverseHorizontalLookDirection = function (value) {\n  if (this.model && this.model.is2d())\n  {\n    logger.warn(\"Viewer3D.setReverseHorizontalLookDirection is not applicable to 2D\");\n    return;\n  }\n\n  this.prefs.set(Prefs3D.REVERSE_HORIZONTAL_LOOK_DIRECTION, value);\n};\n\n/**\n    * Set or unset a view navigation option to reverse the default direction for vertical look operations.\n    *\n    * Not applicable to 2D.\n    *\n    *  Sets the preference in the UI\n    *  @param {boolean} value - value of the option, true for reverse, false for default\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setReverseVerticalLookDirection\n    */\nViewer3D.prototype.setReverseVerticalLookDirection = function (value) {\n  if (this.model && this.model.is2d())\n  {\n    logger.warn(\"Viewer3D.setReverseVerticalLookDirection is not applicable to 2D\");\n    return;\n  }\n\n  this.prefs.set(Prefs3D.REVERSE_VERTICAL_LOOK_DIRECTION, value);\n};\n\n/**\n    * Get the state of the view navigation option that requests the default direction for camera dolly (zoom) operations to be towards the camera pivot point.\n    *\n    *  Sets the preference in the UI\n    *  @param {boolean} value - value of the option, true for towards the pivot, false for default\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setZoomTowardsPivot\n    */\nViewer3D.prototype.setZoomTowardsPivot = function (value) {\n  if (this.model && this.model.is2d())\n  {\n    logger.warn(\"Viewer3D.setZoomTowardsPivot is not applicable to 2D\");\n    return;\n  }\n  this.prefs.set(Prefs3D.ZOOM_TOWARDS_PIVOT, value);\n};\n\n/**\n    * Set or unset a view navigation option to allow the orbit controls to move the camera beyond the north and south poles (world up/down direction). In other words, when set the orbit control will allow the camera to rotate into an upside down orientation. When unset orbit navigation should stop when the camera view direction reaches the up/down direction.\n    *\n    * Not applicable to 2D.\n    *\n    *  Sets the preference in the UI\n    *  @param {boolean} value - value of the option, true to allow orbiting past the poles.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setOrbitPastWorldPoles\n    */\nViewer3D.prototype.setOrbitPastWorldPoles = function (value) {\n  if (this.model && this.model.is2d())\n  {\n    logger.warn(\"Viewer3D.setOrbitPastWorldPoles is not applicable to 2D\");\n    return;\n  }\n\n  this.prefs.set(Prefs3D.ORBIT_PAST_WORLD_POLES, value);\n};\n\n/**\n    * Set or unset a view navigation option which requests that mouse buttons be reversed from their default assignment (i.e. Left mouse operation becomes right mouse and vice versa).\n    *\n    *  Sets the preference in the UI\n    *  @param {boolean} value - value of the option, true to request reversal of mouse button assignments.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setUseLeftHandedInput\n    */\nViewer3D.prototype.setUseLeftHandedInput = function (value) {\n  this.prefs.set(Prefs.LEFT_HANDED_MOUSE_SETUP, value);\n};\n\n/**\n    * Set units for quantities displayed in the property panel. \n    * Only setting linear (distance) quantity units are supported\n    *\n    *  @param {string} value - display units to set. \n    * \n    * The units can be \"\" (file units), \"mm\", \"cm\", \"m\", \"in\", \"ft\", \"ft-and-fractional-in\", \n    * \"ft-and-decimal-in\", \"decimal-in\", \"decimal-ft\", \"fractional-in\", \"m-and-cm\",\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setDisplayUnits\n    */\nViewer3D.prototype.setDisplayUnits = function (value) {\n  this.prefs.set(Prefs.DISPLAY_UNITS, value);\n};\n\n/**\n    * Set the precision for quantities displayed in the property panel. \n    *\n    *  @param {number} value - precision for the units\n    * The value is the number of decimal values after the \".\". \n    * For e.g., a value of\n    * 5 would be either 0.12345 or 1/32 (2^5) for fraction type units\n    * Values greater than 6 is not supported\n    * \n    * If value is not specified, it defaults to the precision\n    * in the file\n    * @alias Autodesk.Viewing.Viewer3D#setDisplayUnitsPrecision\n    */\nViewer3D.prototype.setDisplayUnitsPrecision = function (value) {\n  if (value === null || value === undefined) {\n    value = \"\";\n  }\n  this.prefs.set(Prefs.DISPLAY_UNITS_PRECISION, value);\n};\n\n/**\n    * Set visibility for a single layer, or for all layers.\n    *\n    * @param {?Array} nodes - An array of layer nodes, or a single layer node, or null for all layers\n    * @param {boolean} visible - true to show the layer, false to hide it\n    * @param {boolean=} [isolate] - true to isolate the layer\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setLayerVisible\n    */\nViewer3D.prototype.setLayerVisible = function (nodes, visible, isolate) {\n\n  var layers = this.impl.layers;\n\n  if (nodes === null) {\n    if (visible) {\n      layers.showAllLayers();\n    } else {\n      layers.hideAllLayers();\n    }\n  } else {\n\n    if (!Array.isArray(nodes)) {\n      nodes = [nodes];\n    }\n\n    if (isolate) {\n      layers.hideAllLayers();\n    }\n\n    this.impl.setLayerVisible(nodes, visible);\n  }\n  this.dispatchEvent({ type: et.LAYER_VISIBILITY_CHANGED_EVENT });\n};\n\n/**\n    * Returns true if the layer is visible.\n    *\n    * @param {Object} node - Layer node\n    * @returns {boolean} true if the layer is visible\n    * \n    * @alias Autodesk.Viewing.Viewer3D#isLayerVisible\n    */\nViewer3D.prototype.isLayerVisible = function (node) {\n  return !!(node && node.isLayer && this.impl.isLayerVisible(node));\n};\n\n/**\n    * Returns true if any layer is hidden.\n    *\n    * @returns {boolean} true if any layer is hidden\n    * \n    * @alias Autodesk.Viewing.Viewer3D#anyLayerHidden\n    */\nViewer3D.prototype.anyLayerHidden = function () {\n\n  var root = this.impl.getLayersRoot();\n  var layers = root && root.children;\n  var layersCount = layers ? layers.length : 0;\n\n  for (var i = 0; i < layersCount; ++i) {\n    if (!this.impl.layers.isLayerVisible(layers[i])) {\n      return true;\n    }\n  }\n\n  return false;\n};\n\n/**\n    * Returns true if all layers are hiden.\n    *\n    * @returns {boolean} true if all layers are hidden\n    * \n    * @alias Autodesk.Viewing.Viewer3D#allLayersHidden\n    */\nViewer3D.prototype.allLayersHidden = function () {\n\n  var root = this.impl.getLayersRoot();\n  var layers = root && root.children;\n  var layersCount = layers ? layers.length : 0;\n\n  for (var i = 0; i < layersCount; ++i) {\n    if (this.impl.layers.isLayerVisible(layers[i])) {\n      return false;\n    }\n  }\n\n  return true;\n};\n\n/**\n    * If enabled, set ground shadow color\n    *\n    * Not applicable to 2D\n    *\n    * @param {THREE.Color} color\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setGroundShadowColor\n    */\nViewer3D.prototype.setGroundShadowColor = function (color) {\n  if (this.model && this.model.is2d())\n  {\n    logger.warn(\"Viewer3D.setGroundShadowColor is not applicable to 2D\");\n    return;\n  }\n\n  this.impl.setGroundShadowColor(color);\n};\n\n/**\n    * If enabled, set ground shadow alpha\n    *\n    * Not applicable to 2D\n    *\n    * @param {float} alpha\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setGroundShadowAlpha\n    */\nViewer3D.prototype.setGroundShadowAlpha = function (alpha) {\n  if (this.model && this.model.is2d())\n  {\n    logger.warn(\"Viewer3D.setGroundShadowAlpha is not applicable to 2D\");\n    return;\n  }\n\n  this.impl.setGroundShadowAlpha(alpha);\n};\n\n/**\n    * If enabled, set ground reflection color. This is reset to default when reflections toggled off.\n    *\n    * Not applicable to 2D\n    *\n    * @param {THREE.Color} color\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setGroundReflectionColor\n    */\nViewer3D.prototype.setGroundReflectionColor = function (color) {\n  if (this.model && this.model.is2d())\n  {\n    logger.warn(\"Viewer3D.setGroundReflectionColor is not applicable to 2D\");\n    return;\n  }\n\n  this.impl.setGroundReflectionColor(color);\n};\n\n/**\n    * If enabled, set ground reflection alpha. This is reset to default when reflections toggled off.\n    *\n    * Not applicable to 2D\n    *\n    * @param {float} alpha\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setGroundReflectionAlpha\n    */\nViewer3D.prototype.setGroundReflectionAlpha = function (alpha) {\n  if (this.model && this.model.is2d())\n  {\n    logger.warn(\"Viewer3D.setGroundReflectionAlpha is not applicable to 2D\");\n    return;\n  }\n\n  this.impl.setGroundReflectionAlpha(alpha);\n};\n\n/**\n    * Returns a list of active cut planes\n    *\n    * Not applicable to 2D\n    *\n    * @return {THREE.Vector4[]} List of Vector4 plane representation {x:a, y:b, z:c, w:d}\n    * \n    * @alias Autodesk.Viewing.Viewer3D#getCutPlanes\n    */\nViewer3D.prototype.getCutPlanes = function () {\n  if (this.model && this.model.is2d())\n  {\n    logger.warn(\"Viewer3D.getCutPlanes is not applicable to 2D\");\n    return [];\n  }\n\n  return this.impl.getCutPlanes();\n};\n\n/**\n    * Apply a list of cut planes\n    *\n    * Not applicable to 2D\n    *\n    * @param {THREE.Vector4[]} planes - List of Vector4 plane representation: {x:a, y:b, z:c, w:d}\n    * Plane general equation: ax + by + cz + d = 0 where a, b, and c are not all zero\n    * Passing an empty list or null is equivalent to setting zero cut planes\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setCutPlanes\n    */\nViewer3D.prototype.setCutPlanes = function (planes) {\n  if (this.model && this.model.is2d())\n  {\n    logger.warn(\"Viewer3D.getCutPlanes is not applicable to 2D\");\n    return;\n  }\n  this.impl.setCutPlaneSet(\"__set_view\", planes);\n};\n\n/**\n    * Captures the current screen image as Blob URL\n    * Blob URL can be used like a regular image url (e.g., window.open, img.src, etc)\n    * If width and height are 0, returns asynchronously and calls the callback with an image as Blob URL with dimensions equal to current canvas dimensions\n    * If width and height are given, returns asynchronously and calls the callback with the resized image as Blob URL\n    * If no callback is given, displays the image in a new window.\n    * Optional overlayRenderer can be supplied, in order to render an overlay on top of the renderer image.\n    * @param  {number} [w]  width of the requested image\n    * @param  {number} [h]  height of the requested image\n    * @param  {Function} [cb] callback\n    * @param  {Function} [overlayRenderer] overlayRenderer\n    * @return {DOMString} screenshot image Blob URL, if no parameters are given\n    * \n    * @alias Autodesk.Viewing.Viewer3D#getScreenShot\n    */\nViewer3D.prototype.getScreenShot = function (w, h, cb, overlayRenderer) {\n  return ScreenShot.getScreenShotLegacy(this, w, h, cb, overlayRenderer);\n};\n\n/**\n    * Sets the object context menu.\n    * @param {?ObjectContextMenu=} [contextMenu]\n    */\nViewer3D.prototype.setContextMenu = function (contextMenu) {\n\n  if (this.contextMenu) {\n\n    // Hide the current context menu, just in case it's open right now.\n    // This does nothing if the context menu is not open.\n    //\n    this.contextMenu.hide();\n  }\n\n  this.contextMenu = contextMenu || null; // to avoid undefined\n};\n\n/**\n    * Activates the default context menu.<br>\n    * Contains options Isolate, Hide selected, Show all objects, Focus and Clear selection.\n    *\n    * @returns {boolean} Whether the default context menu was successfully set (true) or not (false)\n    */\nViewer3D.prototype.setDefaultContextMenu = function () {\n\n  var ave = Autodesk.Viewing.Extensions;\n  if (ave && ave.ViewerObjectContextMenu) {\n    this.setContextMenu(new ave.ViewerObjectContextMenu(this));\n    return true;\n  }\n  return false;\n};\n\nViewer3D.prototype.triggerContextMenu = function (event) {\n  if (this.config && this.config.onTriggerContextMenuCallback) {\n    this.config.onTriggerContextMenuCallback(event);\n  }\n\n  if (this.contextMenu) {\n    this.contextMenu.show(event);\n    return true;\n  }\n  return false;\n};\n\nViewer3D.prototype.triggerSelectionChanged = function (dbId) {\n  if (this.config && this.config.onTriggerSelectionChangedCallback) {\n    this.config.onTriggerSelectionChangedCallback(dbId);\n  }\n};\n\nViewer3D.prototype.triggerDoubleTapCallback = function (event) {\n  if (this.config && this.config.onTriggerDoubleTapCallback) {\n    this.config.onTriggerDoubleTapCallback(event);\n  }\n};\n\nViewer3D.prototype.triggerSingleTapCallback = function (event) {\n  if (this.config && this.config.onTriggerSingleTapCallback) {\n    this.config.onTriggerSingleTapCallback(event);\n  }\n};\n\nViewer3D.prototype.triggerSwipeCallback = function (event) {\n  if (this.config && this.config.onTriggerSwipeCallback) {\n    this.config.onTriggerSwipeCallback(event);\n  }\n};\n\nViewer3D.prototype.initContextMenu = function () {\n\n  // Disable the browser's default context menu by default, or if explicitly specified.\n  //\n  var disableBrowserContextMenu = !this.config || (this.config.hasOwnProperty(\"disableBrowserContextMenu\") ? this.config.disableBrowserContextMenu : true);\n  if (disableBrowserContextMenu) {\n    this.onDefaultContextMenu = function (e) {\n      e.preventDefault();\n    };\n    this.container.addEventListener('contextmenu', this.onDefaultContextMenu, false);\n  }\n\n  var self = this;\n\n  var canvas = this.canvas || this.container;\n\n  this.onMouseDown = function (event) {\n    if (EventUtils.isRightClick(event)) {\n      self.startX = event.clientX;\n      self.startY = event.clientY;\n    }\n  };\n\n  canvas.addEventListener('mousedown', this.onMouseDown);\n\n  this.onMouseUp = function (event) {\n    if (EventUtils.isRightClick(event) && event.clientX === self.startX && event.clientY === self.startY) {\n      self.triggerContextMenu(event);\n    }\n    return true;\n  };\n\n  canvas.addEventListener('mouseup', this.onMouseUp, false);\n};\n\n\n/**\n    * Registers a new callback that modifies the context menu.\n    * This allows extensions and others to add, remove, or change items in the context menu.\n    * Extensions that call registerContextMenuCallback() should call unregisterContextMenuCallback() in their unload().\n    * @param {string} id - Unique id to identify this callback. Used by unregisterContextMenuCallback().\n    * @param {function(Array, Object)} callback - Will be called before the context menu is displayed.\n    * @see Viewer.unregisterContextMenuCallback\n    * @see ObjectContextMenu.buildMenu\n    *\n    * @example\n    * // Here's an example that appends a new context menu item:\n    *\n    * viewer.registerContextMenuCallback('MyExtensionName', function (menu, status) {\n   *     if (status.hasSelected) {\n   *         menu.push({\n   *             title: 'My new context menu item with selected objects',\n   *             target: function () {\n   *                 alert('Do something with selected objects');\n   *         }});\n   *     } else {\n   *         menu.push({\n   *             title: 'My new context menu item, no selected objects',\n   *             target: function () {\n   *                 alert('Do something else');\n   *         }});\n   *     }\n   * });\n   */\nViewer3D.prototype.registerContextMenuCallback = function (id, callback) {\n  this.contextMenuCallbacks[id] = callback;\n};\n\n/**\n    * Unregisters an existing callback that modifies the context menu.\n    * Extensions that call registerContextMenuCallback() should call unregisterContextMenuCallback() in their unload().\n    * @param {string} id - Unique id to identify this callback.\n    * @returns {boolean} true if the callback was unregistered successfully.\n    * @see Viewer.registerContextMenuCallback\n    */\nViewer3D.prototype.unregisterContextMenuCallback = function (id) {\n  if (id in this.contextMenuCallbacks) {\n    delete this.contextMenuCallbacks[id];\n    return true;\n  }\n  return false;\n};\n\n/**\n    * Runs all registered context menu callbacks.\n    * @param {array} menu - Context menu items.\n    * @param {Object} status - Information about nodes.\n    * @param {Event} status.event - The UI event that triggered the context menu.\n    * @see ObjectContextMenu.buildMenu\n    * @private\n    */\nViewer3D.prototype.runContextMenuCallbacks = function (menu, status) {\n  for (var id in this.contextMenuCallbacks) {\n    if (this.contextMenuCallbacks.hasOwnProperty(id)) {\n      this.contextMenuCallbacks[id](menu, status);\n    }\n  }\n};\n\n/**\n    * Join a live review session.\n    *\n    * @param {string} [sessionId] - The live review session id to join.\n    *\n    * @private\n    */\nViewer3D.prototype.joinLiveReview = function (sessionId) {var _this7 = this;\n  if (!this.liveReviewClient) {\n    this.liveReviewClient = new LiveReviewClient(this);\n  }\n\n  theResourceLoader.loadScript('socket.io-1.3.5.js', 'lmv_io').then(function () {\n    _this7.liveReviewClient.joinLiveReviewSession(sessionId);\n  });\n};\n\n/**\n    * Leave a live review session.\n    *\n    * @private\n    */\nViewer3D.prototype.leaveLiveReview = function () {\n  if (this.liveReviewClient) {\n    this.liveReviewClient.leaveLiveReviewSession();\n  }\n};\n\n/**\n    * Set model units\n    * @param Model units\n    */\nViewer3D.prototype.setModelUnits = function (modelUnits) {\n  if (this.model) {\n    this.model.getData().overriddenUnits = modelUnits;\n  }\n};\n\n/**\n    * Calculates the pixel position in client space coordinates of a point in world space.<br>\n    * See also\n    * {@link Autodesk.Viewing.Viewer3D#clientToWorld|clientToWorld()}.\n    * @param {THREE.Vector3} point Point in world space coordinates.\n    * @param {THREE.Camera} camera Optional camera to use - default is the viewer's native camera.\n    * @returns {THREE.Vector3} Point transformed and projected into client space coordinates. Z value is 0.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#worldToClient\n    */\nViewer3D.prototype.worldToClient = function (point) {var camera = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : this.impl.camera;\n  return this.impl.worldToClient(point, camera);\n};\n\n/**\n    * Given coordinates in pixel screen space it returns information of the underlying geometry node.\n    * Hidden nodes will not be taken into account. Returns null if there is no geometry in the specified location.\n    * For 2d models, it will return null outside the paper, unless ignore2dModelBounds is true.<br>\n    * See also\n    * {@link Autodesk.Viewing.Viewer3D#worldToClient|worldToClient()}.\n    *\n    * @param {Number} clientX - X coordinate where 0 is left\n    * @param {Number} clientY - Y coordinate where 0 is top\n    * @param {Boolean} [ignoreTransparent] - Ignores transparent materials\n    * @param {boolean} [ignore2dModelBounds] - For 2d models - whether to return a result outside of the model's bounds.\n    * @returns {Object|null} contains point attribute. 3d models have additional attributes.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#clientToWorld\n    */\nViewer3D.prototype.clientToWorld = function (clientX, clientY, ignoreTransparent, ignore2dModelBounds) {\n\n  return this.impl.clientToWorld(clientX, clientY, ignoreTransparent, ignore2dModelBounds);\n};\n\n/**\n    * Expose if the model has topology information downloaded.\n    * Only applicable to 3D models.\n    * @returns {boolean} value - Indicates whether the model has topology information.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#modelHasTopology\n    */\nViewer3D.prototype.modelHasTopology = function () {\n\n  if (this.model && this.model.hasTopology()) {\n    return true;\n  }\n\n  return false;\n};\n\n/**\n    * Changes the color of the selection for a particular selection type.\n    * - Autodesk.Viewing.SelectionType.MIXED\n    *   - Sets the same color for regular and overlayed selection.\n    * - Autodesk.Viewing.SelectionType.REGULAR\n    *   - Sets the color of regular selection.\n    * - Autodesk.Viewing.SelectionType.OVERLAYED\n    *   - Sets the color of overlayed selection.\n    *\n    * @example\n    *  viewer.setSelectionColor(new THREE.Color(0xFF0000), Autodesk.Viewing.SelectionType.MIXED); // red color\n    * @param {THREE.Color} color\n    * @param {number} selectionType a member of Autodesk.Viewing.SelectionMode.\n    * @alias Autodesk.Viewing.Viewer3D#setSelectionColor\n    */\nViewer3D.prototype.setSelectionColor = function (color, selectionType) {\n  this.impl.setSelectionColor(color, selectionType);\n};\n\n/**\n    * Changes the color of the selection for 2D drawings.\n    *\n    * @example\n    *  viewer.set2dSelectionColor(new THREE.Color(0xFF0000), 0.1); // red color, opacity of 0.1\n    * @param {THREE.Color} color\n    * @param {number} opacity\n    * \n    * @alias Autodesk.Viewing.Viewer3D#set2dSelectionColor\n    */\nViewer3D.prototype.set2dSelectionColor = function (color, opacity) {\n  this.impl.set2dSelectionColor(color, opacity);\n};\n\n/**\n    * Sets the current UI theme of the viewer.\n    * Supported values are \"light-theme\" and \"dark-theme\", which is the default.\n    * \n    * @param {string} name - Name of the theme, it will be added to the viewer's container class list.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setTheme\n    */\nViewer3D.prototype.setTheme = function (name) {\n\n  var classList = this.container.classList;\n\n  // Remove previous themes.\n  for (var i = 0; i < classList.length; ++i) {\n    var index = classList[i].indexOf('-theme');\n    if (index !== -1) {\n      classList.remove(classList[i--]);\n    }\n  }\n\n  // Set current theme.\n  classList.add(name);\n};\n\n/**\n    * Highlight an object with a theming color that is blended with the original object's material.\n    * @param {number} dbId\n    * @param {THREE.Vector4} color - (r, g, b, intensity), all in [0,1].\n    * @param {Autodesk.Viewing.Model} [model] - For multi-model support.\n    * @param {boolean} [recursive] - Should apply theming color recursively to all child nodes.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#setThemingColor\n    */\nViewer3D.prototype.setThemingColor = function (dbId, color, model, recursive) {\n  // use default RenderModel by default\n  model = model || this.model;\n\n  model.setThemingColor(dbId, color, recursive);\n\n  // we changed the scene to apply theming => trigger re-render\n  this.impl.invalidate(true);\n};\n\n/**\n    * Restore original colors for all themed shapes.\n    * @param {Autodesk.Viewing.Model} [model] - For multi-model support.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#clearThemingColors\n    */\nViewer3D.prototype.clearThemingColors = function (model) {\n  // use default RenderModel by default\n  model = model || this.model;\n\n  model.clearThemingColors();\n\n  // we changed the scene to apply theming => trigger re-render\n  this.impl.invalidate(true);\n};\n\n/**\n    * @deprecated\n    * Transfer model from this viewer to another one - including state of selection, ghosting, and theming.\n    * Note that this does not work with OTG models, because a single OTG geometry may be shared by different OTG models.\n    */\nViewer3D.prototype.transferModel = function (modelId, viewer) {\n\n  var model = this.impl.findModel(modelId);\n  if (!model) {\n    // unknown modeId\n    return;\n  }\n\n  // collect all selected db ids for this model\n  var selectedIds = [];\n  this.getAggregateSelection(function (model, dbId) {\n    if (model.id == modelId) {\n      selectedIds.push(dbId);\n    }\n  });\n\n  // collect isolated/hidden nodes\n  var isolatedIds = this.impl.visibilityManager.getIsolatedNodes(model);\n  var hiddenIds = this.impl.visibilityManager.getHiddenNodes(model);\n\n  // export all materials and textures to MaterialManager of the other viewer\n  // Note: Getting the materials from MaterialManager directly is the safest way for consistent state between both viewers.\n  // E.g., enumerating the materials of the RenderModel instead would not work for 2 reasons:\n  //  a) If the model is still loading, some materials would get lost: SvfLoader adds all materials in onModelRootLoadDone() already.\n  //     But, RenderModel only knows materials for meshes that have been already loaded.\n  //  b) The material hashes are only known to MaterialManager\n  var modelMaterials = this.impl.matman().exportModelMaterials(model);\n\n  // The unloadModel() call below also stops/destroys the model loader. Normally, this is wanted. Just in this case,\n  // we want to keep the loader alive, so that the other viewer can load the rest of the model. Therefore,\n  // we temporarily decouple it from the model and attach it again after transferring the model.\n  var loader = model.loader;\n  model.loader = null;\n\n  // detach model from this viewer and discard all GPU resources.\n  this.impl.unloadModel(model);\n\n  // re-attach loader to model\n  model.loader = loader;\n\n  // Set rendering prefs before adding the model (to prevent flashing of the environment)\n  if (model.isAEC() && model.is3d()) {\n    viewer.impl.setLightPresetForAec();\n  }\n  viewer.impl.setRenderingPrefsFor2D(model.is2d());\n\n  // pass model to other viewer\n  viewer.impl.addModel(model);\n\n  // import materials to new viewer\n  // Note that it is essential to do export/import of materials in separate steps:\n  //  - Exporting materials must be done before removing the model. After removeModel(),\n  //    MaterialManager would not contain the material of this model anymore.\n  //  - Importing materials must be done after adding the model to make sure that everything is properly initialized.\n  //    E.g., the layerTexture would not be initialized otherwise.\n  viewer.impl.matman().importModelMaterials(modelMaterials, modelId);\n\n  // if the other viewer had no model before, make sure that the loadSpinner disappears.\n  viewer._loadingSpinner.hide();\n\n  // link running loader to new viewer\n  if (model.loader && model.loader.viewer3DImpl === this.impl) {\n    model.loader.viewer3DImpl = viewer.impl;\n  }\n\n  // if model is still loading, the worker will call onLoadComplete later. If the model is still loaded,\n  // we do it immediately.\n  if (model.getData().loadDone) {\n    viewer.impl.onLoadComplete(model);\n  }\n\n  // recover selection\n  viewer.impl.selector.setSelection(selectedIds, model);\n\n  // recover isolated/hidden nodes (Note that hiddenIds are only used if no node is isolated)\n  if (isolatedIds.length != 0) viewer.impl.visibilityManager.isolate(isolatedIds, model);else\n  if (hiddenIds.length != 0) viewer.impl.visibilityManager.hide(hiddenIds, model);\n};\n\n/**\n       * Temporarily remove a model from the Viewer, but keep loaders, materials, and geometry alive.\n       *\n       * @param {number|Autodesk.Viewing.Model} model - model id or Model object\n       * @returns {boolean} true indicates success, i.e., modelId referred to a visible model that is now hidden\n       * \n       * @see Autodesk.Viewing.Viewer3D#showModel\n       * \n       * @alias Autodesk.Viewing.Viewer3D#hideModel\n       */\nViewer3D.prototype.hideModel = function (model) {\n  var scene = this.impl.modelQueue();\n  // find visible model with this id\n  model = typeof model === 'number' ? scene.findModel(model) : model;\n\n  if (!model) {\n    return false;\n  }\n\n  // remove model from viewer - but without discarding materials\n  this.impl.removeModel(model);\n\n  // make this model available for later showModel() calls\n  scene.addHiddenModel(model);\n\n  return true;\n};\n\n/**\n       * Make a previously hidden model visible again.\n       *\n       * @param {number|Autodesk.Viewing.Model} model - model id or Model object\n       * @param {bool} preserveTools - disable automatic activation of default tool\n       * @returns {boolean} true indicates success, i.e., ``model`` referred to a hidden model that is now visible\n       * \n       * @see Autodesk.Viewing.Viewer3D#hideModel\n       * \n       * @alias Autodesk.Viewing.Viewer3D#showModel\n       */\nViewer3D.prototype.showModel = function (model, preserveTools) {\n  var scene = this.impl.modelQueue();\n  model = typeof model === 'number' ? scene.findHiddenModel(model) : model;\n\n  if (!model) {\n    // modelId does not refer to any hidden model\n    return false;\n  }\n\n  // remove model from list of hidden ones\n  scene.removeHiddenModel(model);\n\n  // add it to the viewer.\n  this.impl.addModel(model, preserveTools);\n\n  return true;\n};\n\n/**\n    * @returns {Autodesk.Viewing.Model[]}\n    * \n    * @alias Autodesk.Viewing.Viewer3D#getVisibleModels\n    */\nViewer3D.prototype.getVisibleModels = function () {\n  var scene = this.impl.modelQueue();\n  return scene.getModels().slice();\n};\n\n/**\n    * @returns {Autodesk.Viewing.Model[]}\n    * \n    * @alias Autodesk.Viewing.Viewer3D#getHiddenModels\n    */\nViewer3D.prototype.getHiddenModels = function () {\n  var scene = this.impl.modelQueue();\n  return scene.getHiddenModels().slice();\n};\n\n/**\n    * @returns {Autodesk.Viewing.Model[]}\n    * \n    * @alias Autodesk.Viewing.Viewer3D#getAllModels\n    */\nViewer3D.prototype.getAllModels = function () {\n  return this.getVisibleModels().concat(this.getHiddenModels());\n};\n\n/**\n    * @private\n    */\nViewer3D.prototype.restoreDefaultSettings = function () {\n\n  var model = this.model;\n  var tag = model.is2d() ? '2d' : '3d';\n  this.prefs.reset(tag);\n\n  this.impl.setupLighting(model);\n  if (model.isAEC() && model.is3d()) {\n    this.impl.setLightPresetForAec();\n  }\n  this.impl.setRenderingPrefsFor2D(!model.is3d());\n\n  this.fireEvent({ type: et.RESTORE_DEFAULT_SETTINGS_EVENT });\n};\n\n/**\n    * Disables roll-over highlighting.\n    * @param {boolean} disable - Indicates whether highlighting should be on or off. True to disable highlights, false to enable them.\n    *\n    * @alias Autodesk.Viewing.Viewer3D#disableHighlight\n    */\nViewer3D.prototype.disableHighlight = function (disable) {\n  this.impl.disableHighlight(disable);\n};\n\n/**\n    * disable the selection of a loaded model.\n    * @param {boolean} disable - true to disable selection, false to enable selection.\n    * \n    * @alias Autodesk.Viewing.Viewer3D#disableSelection\n    */\nViewer3D.prototype.disableSelection = function (disable) {\n  if (disable) {\n    this.clearSelection();\n  }\n  this.impl.disableSelection(disable);\n};\n\n/**\n    * check if the mouse-over highlight is disabled or not\n    * \n    * @alias Autodesk.Viewing.Viewer3D#isHighlightDisabled\n    */\nViewer3D.prototype.isHighlightDisabled = function () {\n  return this.impl.selector.highlightDisabled;\n};\n\n/**\n    * check if the mouse-over highlight is paused or not\n    * \n    * @alias Autodesk.Viewing.Viewer3D#isHighlightPaused\n    */\nViewer3D.prototype.isHighlightPaused = function () {\n  return this.impl.selector.highlightPaused;\n};\n\n/**\n    * check if the mouse-over highlight is active or not\n    * @alias Autodesk.Viewing.Viewer3D#isHighlightActive\n    */\nViewer3D.prototype.isHighlightActive = function () {\n  return !(this.impl.selector.highlightDisabled || this.impl.selector.highlightPaused);\n};\n\n/**\n    * check if the selection of the loaded model is disabled or not\n    * @alias Autodesk.Viewing.Viewer3D#isSelectionDisabled\n    */\nViewer3D.prototype.isSelectionDisabled = function () {\n  return this.impl.selector.selectionDisabled;\n};\n\n/**\n    * Activates the extension based on the extensionID and mode given. By default it takes the first available mode in getmodes();\n    * @param {string} extensionID - The extension id.\n    * @param {string} [mode]\n    * \n    * @alias Autodesk.Viewing.Viewer3D#activateExtension\n    */\nViewer3D.prototype.activateExtension = function (extensionID, mode) {\n  if (this.loadedExtensions && extensionID in this.loadedExtensions) {\n    var extension = this.loadedExtensions[extensionID];\n    return extension.activate(mode);\n  } else {\n    logger.warn(\"Extension is not loaded or doesn't exist\");\n    return false;\n  }\n};\n\n/**\n    * Dectivates the extension based on the extensionID specified.\n    * @param {string} extensionID\n    * @alias Autodesk.Viewing.Viewer3D#deactivateExtension\n    */\nViewer3D.prototype.deactivateExtension = function (extensionID) {\n  if (this.loadedExtensions && extensionID in this.loadedExtensions) {\n    var extension = this.loadedExtensions[extensionID];\n    return extension.deactivate();\n  } else {\n    logger.warn(\"Extension is not loaded or doesn't exist\");\n    return false;\n  }\n};\n\n/**\n    * Check if the extension is active or not by passing the extensionID.\n    * @param {string} extensionID\n    * @param {string} mode\n    * @alias Autodesk.Viewing.Viewer3D#isExtensionActive\n    */\nViewer3D.prototype.isExtensionActive = function (extensionID, mode) {\n  if (this.loadedExtensions && extensionID in this.loadedExtensions) {\n    var extension = this.loadedExtensions[extensionID];\n    var activeStatus = extension.isActive(mode);\n    return activeStatus;\n\n  } else {\n    logger.warn(\"Extension is not loaded or doesn't exist\");\n    return false;\n  }\n};\n\n/**\n    * Check if the extension is loaded or not by passing the extensionID.\n    * @param {string} extensionID\n    * @alias Autodesk.Viewing.Viewer3D#isExtensionLoaded\n    */\nViewer3D.prototype.isExtensionLoaded = function (extensionID) {\n  return this.loadedExtensions && extensionID in this.loadedExtensions;\n};\n\n/**\n    * Get a list of all the extensions that are currently loaded.\n    * @returns {string[]}\n    * @alias Autodesk.Viewing.Viewer3D#getLoadedExtensions\n    */\nViewer3D.prototype.getLoadedExtensions = function () {\n  return this.loadedExtensions || [];\n};\n\n/**\n    * Get a list of all the modes that are available for the given extensionID.\n    * @param {string} extensionID\n    * @alias Autodesk.Viewing.Viewer3D#getExtensionModes\n    */\nViewer3D.prototype.getExtensionModes = function (extensionID) {\n  if (this.loadedExtensions && extensionID in this.loadedExtensions) {\n    var extension = this.loadedExtensions[extensionID];\n    return extension.getModes();\n  } else {\n    console.warn(\"Extension is not loaded or doesn't exist\");\n    return [];\n  }\n};\n\n/**\n    * Reorders elements in the viewer container that need a certain order in the DOM to work correctly,\n    * according to what's set in containerLayerOrder\n    * @param {object} element - the element that needs reordering\n    */\nViewer3D.prototype.reorderElements = function (element) {\n  var id = element.getAttribute('layer-order-id');\n  var order = this.containerLayerOrder.indexOf(id);\n\n  var nextElement = null;\n\n  if (order !== -1) {\n    for (var i = order + 1; i < this.containerLayerOrder.length && !nextElement; i++) {\n      nextElement = this.container.querySelector('[layer-order-id=\"' + this.containerLayerOrder[i] + '\"]');\n    }\n  }\n\n  nextElement ? this.container.insertBefore(element, nextElement) : this.container.appendChild(element);\n};\n\n/**\n    * Appends a new div element, inserting it in the correct order according to what's in containerLayerOrder\n    * @param {string} layerOrderId - the id for the newly created div\n    */\nViewer3D.prototype.appendOrderedElementToViewer = function (layerOrderId) {\n  var existingElement = this.container.querySelector('[layer-order-id=\"' + layerOrderId + '\"]');\n\n  if (existingElement) {\n    return existingElement;\n  }\n\n  var element = this.getDocument().createElement('div');\n  element.setAttribute('layer-order-id', layerOrderId);\n\n  this.reorderElements(element);\n\n  return element;\n};\n\n/**\n    * Object that is returned by the ray cast and hit test methods for each scene object under the given canvas coordinates.\n    * @typedef {object} Intersection\n    * @property {number} dbId - Internal ID of the scene object.\n    * @property {number} distance - Distance of the intersection point from camera. All intersections\n    *  returned by the ray casting method are sorted from the smallest distance to the largest.\n    * @property {THREE.Face3} face - THREE.Face3 object\n    *  representing the triangular mesh face that has been intersected.\n    * @property {number} faceIndex - Index of the intersected face, if available.\n    * @property {number} fragId - ID of Forge Viewer *fragment* that was intersected.\n    * @property {THREE.Vector3} point - THREE.Vector3 point of intersection.\n    * @property {Autodesk.Viewing.Model} model - Model instance the dbId belongs to.\n    */\n\n/**\n        * Returns the intersection information for point x,y. If no intersection is found this function will return null.\n        * @param {number} x - X-coordinate, i.e., horizontal distance (in pixels) from the left border of the canvas.\n        * @param {number} y - Y-coordinate, i.e., vertical distance (in pixels) from the top border of the canvas.\n        * @param {boolean} [ignoreTransparent] - ignores any transparent objects that might intersect x,y \n        * @returns {Intersection|null} - Intersection information about closest hit point.        \n        * \n        * @alias Autodesk.Viewing.Viewer3D#hitTest\n        */\nViewer3D.prototype.hitTest = function (x, y, ignoreTransparent) {\n  return this.impl.hitTest(x, y, ignoreTransparent);\n};\n\n/**\n    * Clears the screen and redraws the overlays if *clear* is set to true.\n    * Only the overlays will be redrawn if *clear* is set to false.\n    * Should only be called when absolutely needed.\n    * \n    * @param {boolean} clear - clears the screen and redraws the overlays.\n    * @alias Autodesk.Viewing.Viewer3D#refresh\n    */\nViewer3D.prototype.refresh = function (clear) {\n  this.impl.invalidate(clear, false, !clear);\n};\n\n\n/**\n    * Function that decides which {@link Autodesk.Viewing.Profile} to use when\n    * a model is loaded for the first time.\n    *\n    * Override this method to implement a different logic.\n    *\n    * @params {Object} [options] - Value passed into {#loadModel} function.\n    *\n    * @returns {Autodesk.Viewing.Profile|null} a Profile\n    *\n    * @alias Autodesk.Viewing.Viewer3D#chooseProfile\n    */\nViewer3D.prototype.chooseProfile = function (options) {\n\n  var profile = this.profileManager.PROFILE_DEFAULT;\n\n  if (this.config && this.config.profileSettings) {\n    profile = new Profile(this.config.profileSettings);\n  } else\n  if (options && !!options.useFileProfile) {\n    profile = this.profileManager.getProfileOrDefault(options.fileExt);\n  } else\n  if (BUILD_FLAG__FLUENT_PROFILE) {\n    // Always use Fluent's profile for fluent builds.\n    // It has priority over the AEC profile.\n    profile = this.profileManager.PROFILE_FLUENT;\n  } else\n  if (options.isAEC) {\n    profile = this.profileManager.PROFILE_AEC;\n  }\n\n  return profile;\n};","// Viewer3D offers public methods for developers to use.\n// Viewer3DImpl is the implementation file for Viewer3D and is only used by Viewer3D.js\n// \n// Viewer3D does things like parameter validation.\n// Viewer3DImpl does the actual work, by interfacing with other internal components, such as the MaterialManager.\n\nimport { getGlobal, isNodeJS, isMobileDevice, isIE11, isSafari, isIOSDevice } from \"../compat\";\nimport { ScreenShot } from \"./ScreenShot\";\nimport { ProgressState } from \"./ProgressState\";\nimport { RenderScene } from \"../wgs/scene/RenderScene\";\nimport { RenderContext } from \"../wgs/render/RenderContext\";\nimport { MaterialManager } from \"../wgs/render/MaterialManager\";\nimport { MultiModelSelector } from \"../tools/Selector\";\nimport { MultiModelVisibilityManager } from \"../tools/VisibilityManager\";\nimport { LightPresets, DefaultLightPreset, DefaultLightPreset2d, BackgroundPresets, copyLightPreset } from \"./LightPresets\";\nimport { GroundShadow } from \"../wgs/render/GroundShadow\";\nimport { OtgResourceCache } from \"../file-loaders/main/OtgResourceCache\";\nimport { logger } from \"../logger/Logger\";\nimport { TextureLoader } from \"../file-loaders/main/TextureLoader\";\nimport { WebGLRenderer } from \"../wgs/render/WebGLRenderer\";\nimport { RenderFlags } from \"../wgs/scene/RenderFlags\";\nimport * as shadow from \"../wgs/render/ShadowMap\";\nimport { GroundFlags } from \"../wgs/render/GroundFlags\";\nimport { ResetFlags } from \"../wgs/scene/ResetFlags\";\nimport { GroundReflection } from \"../wgs/render/GroundReflection\";\nimport { ModelLayers } from \"./ModelLayers\";\nimport { FragmentPointer } from \"../wgs/scene/FragmentList\";\nimport { CreateCubeMapFromColors } from \"../wgs/render/DecodeEnvMap\";\nimport { getResourceUrl } from \"../globals\";\nimport { SAOShader } from \"../wgs/render/SAOShader\";\nimport { VBIntersector } from \"../wgs/scene/VBIntersector\";\nimport { VertexBufferReader, BoundsCallback } from \"../wgs/scene/VertexBufferReader\";\nimport * as THREE from \"three\";\nimport { UnifiedCamera } from \"../tools/UnifiedCamera\";\nimport * as et from \"./EventTypes\";\nimport { Navigation } from \"../tools/Navigation\";\nimport { SelectionType } from \"../tools/SelectionType\";\nimport { BubbleNode } from \"./bubble\";\nimport { SceneMath } from \"../wgs/scene/SceneMath\";\nimport { GlobalManagerMixin } from '../application/GlobalManagerMixin';\nimport { Prefs3D, Prefs2D, Prefs } from \"./PreferenceNames\";\nimport SheetRenderContext from \"../wgs/render/SheetRenderContext\";\n\nvar ModelSettingsEnvironment = null;\n\nvar ENABLE_DEBUG = getGlobal().ENABLE_DEBUG;\nvar ENABLE_DEBUG_RCS = getGlobal().ENABLE_DEBUG_RCS;\n\n\n//default parameters for WebGL initialization\nexport var InitParametersSetting = {\n  canvas: null,\n  antialias: false,\n  alpha: false,\n  premultipliedAlpha: false,\n  preserveDrawingBuffer: true,\n  stencil: false,\n  depth: false };\n\n\n// Create a webgl renderer\nexport function createRenderer(canvas) {var webglInitParams = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n  if (isNodeJS()) {\n    return;\n  }\n\n  var params = Object.assign({}, InitParametersSetting, webglInitParams);\n  params.canvas = canvas;\n\n  var renderer = new WebGLRenderer(params);\n\n  if (!renderer.context)\n  return null;\n\n  renderer.autoClear = false;\n\n  //Turn off scene sorting by THREE -- this is ok if we\n  //do progressive draw in an order that makes sense\n  //transparency-wise. If we start drawing using a frustum culling\n  //r-tree or there are problems with transparency we'd have to turn on sorting.\n  renderer.sortObjects = false;\n\n  return renderer;\n}\n\n/** \n  * @constructor\n  * @private\n  * */\nexport function Viewer3DImpl(thecanvas, theapi)\n{var _this2 = this;\n  var _this = this;\n  this.setGlobalManager(theapi.globalManager);\n\n  //Frame time cutoffs in milliseconds. We target the middle value,\n  //but adjust the CPU-side work in the give min/max range\n  //once we measure actual frame times (including async GPU work, system load, etc).\n  //NOTE: These are doubled for mobile devices at construction time (end of this file).\n  var MAX_FRAME_BUDGET = 1000 / 15,\n  TARGET_FRAME_TIME = 1000 / 30,\n  MIN_FRAME_BUDGET = 1; // This is the minimum time we will spend drawing and\n  // is only indirectly related to the fastest frame rate.\n\n  var _currentLightPreset = -1;\n  var _oldLightPreset = -1;\n  var _3dLightPreset = -1; // LMV-5655: Keeps track of the last 3d light preset\n  var _oldCallback = null;\n\n  var _worldUp;\n  var _worldUpName = \"y\";\n\n  var _reqid, _needsResize, _newWidth, _newHeight, _materials;\n  var _webglrender, _renderer;\n  var _sheetRenderer;\n\n  var _shadowMaps;\n\n  // Default direction in world-space from which we get the most light from. Needed for shadow casting.\n  // The default is only used if no direction is specified by light preset or model.\n  var _shadowLightDirDefault = null; // {THREE.Vector3}\n  var _shadowLightDir = null; //\n\n  var _lightDirDefault = null;\n\n  var _needsClear = false,\n  _needsRender = false,\n  _overlayDirty = false;\n  //var _spectorDump = false;\n\n  var _progressEvent = { type: et.PROGRESS_UPDATE_EVENT, state: ProgressState.LOADING, percent: 0 };\n\n  var _sceneDirty = false;\n  var _neededPresent = false; // True if previous frame needed to present.\n\n  // A \"silent render\" means to do a full, but interruptible, render in the background. Display the result on completion.\n  // The idea is to make a good-quality render after a progressive render occurs, or after some new content has been loaded,\n  // or some other situation where we don't want to \"lose progress,\" that is, we don't want to do a progressive render but\n  // rather want to add to or modify an existing render on the screen.\n  var _deferredSilentRender = false;\n  var _immediateSilentRender = false;\n\n  var _cameraUpdated;\n\n  var _explodeScale = 0;\n\n  var _lastHighResTimeStamp = 0;\n\n  var _frameTimeAvg = 1000.0 / 60.0;\n  var _frameTimeSamples = 0;\n\n  var _isLoading = true; // turned off in onLoadComplete()\n\n  var _groundShadow, _groundReflection;\n\n  var _envMapBackground = false;\n\n  var _modelQueue;\n\n  var _lightsInitialized = false;\n  var _defaultLightIntensity = 1.0;\n  var _defaultDirLightColor = null; // {THREE.Color}\n  var _defaultAmbientColor = null; //\n\n  // apply separate edge color/opacity \n  this.edgeColorMain = new THREE.Vector4(0, 0, 0, 0.3);\n  this.edgeColorGhosted = new THREE.Vector4(0, 0, 0, 0.1);\n\n  var _lmvDisplay = getGlobal(); // return 'window', or something else for NodeJs context that won't work anyways.\n\n  // render command system\n  var _rcs;\n\n  //OTG geom cache\n  var _geomCache;\n\n  // Listener used to load StandardSurface extension when we load\n  // a model with standard surface materials\n  var _stdSurfaceLoadListener = function _stdSurfaceLoadListener(e) {\n    var model = e.model;\n    // Make sure the viewr is still active and the model has standard surface materials\n    if (_this2.canvas && model && model.getData() && model.getData().stdSurfMats &&\n    model.getData().stdSurfMats[\"materials\"]) {\n      // If we have surface materials then load the extension\n      _this2.api.loadExtension(\"Autodesk.StandardSurface\").then(function (extension) {\n        // Extension loaded, process the model if the loader hasn't been destroyed\n        if (extension)\n        extension.processModel(model);\n      });\n    }\n  };\n\n\n  var _onModelRootLoaded = function _onModelRootLoaded(e) {return e.model.modelRootLoaded = true;};\n\n  // keys: name of cutplane set. values: array of cutplanes\n  var _cutPlaneSets = {};\n\n  // 2D rendering onto a cutplane can only be adjusted for a single cutplane. This key defines for which one:\n  // The first cutplane in this cutPlaneSet.   \n  var _cutPlaneSetFor2DRendering = \"\";\n\n  // we assume the program starts in a \"doing work\" state\n  var _workPreviousTick = true;\n  var _workThisTick;\n\n  if (thecanvas) {\n    this.interval = setInterval(function () {\n      // Only start reporting the framerate to ADP when there's been \"enough\" samples\n      if (_isLoading || _frameTimeSamples < 60) {\n        return;\n      }\n      _this.track({ name: 'fps', value: Number(_this.fps().toFixed(2)), aggregate: 'last' });\n    }, 30000);\n  }\n\n  this.api = theapi;\n  this.canvas = thecanvas;\n  this.loader = null;\n  this.canvasBoundingclientRectDirty = true;\n\n  this.nearRadius = 0;\n  this.defaultLoadingAnimationDuration = 300; // Time in milliseconds to load a 2D line.\n  this.lastTime2dGeometryCreated = 0;\n\n  // Optional: If >0, models whose camera distance exceeds this value are excluded from near/far-plane computation.\n  this.maxModelDistance = 0;\n\n  //Slower initialization pieces can be delayed until after\n  //we start loading data, so they are separated out here.\n  this.initialize = function () {var initOptions = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n\n    _worldUp = new THREE.Vector3(0, 1, 0);\n    _modelQueue = new RenderScene();\n\n    _webglrender = initOptions.glrenderer || createRenderer(thecanvas, initOptions.webglInitParams);\n    if (!_webglrender && !isNodeJS()) {\n      return;\n    }\n\n    if (_webglrender) {\n      this.onWebGLcontextLost = this.onWebGLcontextLost.bind(this);\n      _webglrender.webglcontextlost = this.onWebGLcontextLost;\n      _webglrender.refCount++;\n    }\n\n    _renderer = initOptions.renderer || new RenderContext();\n    _renderer.init(_webglrender, thecanvas ? thecanvas.clientWidth : 0, thecanvas ? thecanvas.clientHeight : 0, initOptions);\n\n    _materials = initOptions.materialManager || new MaterialManager(_webglrender);\n\n    _materials.refCount++;\n\n    //this.camera = new THREE.CombinedCamera( w, h, VIEW_ANGLE, NEAR, FAR, NEAR, FAR);\n    // this.camera = new THREE.PerspectiveCamera( VIEW_ANGLE, thecanvas.clientWidth/thecanvas.clientHeight, NEAR, FAR);\n    // this.cameraChangedEvent = {type: et.CAMERA_CHANGE_EVENT, camera: this.camera};\n    //this.camera = new THREE.CombinedCamera( w, h, VIEW_ANGLE, NEAR, FAR, NEAR, FAR);\n    this.camera = new UnifiedCamera(thecanvas ? thecanvas.clientWidth : 512, thecanvas ? thecanvas.clientHeight : 512);\n    this.lightsOn = false;\n    // we'll fill this in later, in initLights.\n    this.lights = [];\n    // pass in when lightsOn is false;\n    this.no_lights = [];\n\n    _defaultDirLightColor = new THREE.Color().setRGB(1, 1, 1);\n    _defaultAmbientColor = new THREE.Color().setRGB(1, 1, 1);\n\n    // this.camera = this.unicam.getOrthographicCamera();\n    this.cameraChangedEvent = { type: et.CAMERA_CHANGE_EVENT, camera: this.camera };\n\n    _shadowLightDirDefault = new THREE.Vector3(1, 1, 1); // which does not match the _lightDirDefault\n    _shadowLightDir = new THREE.Vector3().copy(_shadowLightDirDefault);\n    _lightDirDefault = new THREE.Vector3(-1, 0, 1); // a horizontal light, which is not a good default shadowd direction\n\n    //This scene will just hold the camera and lights, while\n    //we keep groups of progressively rendered geometry in\n    //separate geometry scenes.\n    this.scene = new THREE.Scene();\n    this.sceneAfter = new THREE.Scene();\n    this.sceneAfter.sortObjects = false;\n\n    this.overlayScenes = {};\n\n    setupSelectionHighlight();\n\n    // No override materials for the scene for selected transparent objects, instead we overwrite the material for the duplicated geometry in this.highlightFragment()\n    // this.selectionMaterialBase is the visible base highlight.\n    // this.selectionMaterialTop draws over everything.\n    this.createOverlayScene(\"selection\", this.selectionMaterialBase, this.selectionMaterialTop);\n\n    // no override materials for the scene for selected point clouds, because it overwrites the point size setting.\n    // instead we overwrite the material for the duplicated geometry in this.highlightFragment()        \n    this.createOverlayScene(\"selection_points\", null, null);\n\n    this.selectionMeshes = {};\n\n    this.fadeMaterial = new THREE.MeshPhongMaterial({ color: 0xffffff, opacity: 0.1, reflectivity: 0, transparent: true, depthWrite: false });\n    this.fadeMaterial.packedNormals = true;\n    _materials.addInstancingSupport(this.fadeMaterial);\n    _materials.addMaterial(\"__fadeMaterial__\", this.fadeMaterial, true);\n\n    this.setSelectionColor(0x6699ff);\n\n\n    //Polygon offset is always used.\n    _materials.togglePolygonOffset(true);\n    _renderer.setDepthMaterialOffset(_materials.getPolygonOffsetOn(), _materials.getPolygonOffsetFactor(), _materials.getPolygonOffsetUnits());\n\n    //Settings exposed to GUI:\n    this.progressiveRender = true;\n    this.swapBlackAndWhite = false;\n\n    this.targetFrameBudget = TARGET_FRAME_TIME;\n\n    // How many ticks pass in between updates. Make this half as many for mobile because the frame budget is doubled.\n    // 1 means that we display every frame\n    this.frameDisplayRate = 5;\n    if (isMobileDevice()) {\n      MAX_FRAME_BUDGET *= 2; // Increase to match TARGET_FRAME_TIME\n      TARGET_FRAME_TIME *= 2; // GPUs are slower on mobile use a longer target frame time\n      this.targetFrameBudget /= 2; // Even though the target's doubled, start the budget smaller and have it work up to the target (ask Cleve)\n      this.frameDisplayRate /= 2; // since time per tick is doubled (in the long run), halve the number of ticks to give the same wall-clock delay interval\n    }\n    // How much time between checks on a full frame for any interrupt signal.\n    this.interruptBudget = 1e10;\n\n    this.controls = {\n      update: function update(timeStamp) {\n        this.camera.lookAt(this.camera.target);\n        this.camera.updateProjectionMatrix();\n        this.camera.dirty = false;\n      },\n      handleResize: function handleResize() {},\n      recordHomeView: function recordHomeView() {},\n      uninitialize: function uninitialize() {},\n      isToolActivated: function isToolActivated() {return false;} };\n\n\n    this.selector = new MultiModelSelector(this);\n\n    this.visibilityManager = new MultiModelVisibilityManager(this);\n\n    this.showGhosting = true;\n    this.showOverlaysWhileMoving = true;\n    this.skipAOWhenMoving = false;\n\n    this.keyFrameAnimator = null;\n    this.zoomBoundsChanged = true;\n\n    var cc = LightPresets[DefaultLightPreset].bgColorGradient;\n    this.setClearColors(cc[0], cc[1], cc[2], cc[3], cc[4], cc[5]);\n\n    _groundShadow = new GroundShadow(_webglrender);\n    _groundShadow.enabled = true;\n\n    _rcs = new RenderCommandSystem();\n\n    // TODO_NOP: hack register materials for cutplanes\n    _materials.addMaterialNonHDR(\"groundShadowDepthMaterial\", _groundShadow.getDepthMaterial());\n    _materials.addOverrideMaterial(\"normalsMaterial\", _renderer.getDepthMaterial());\n    _materials.addOverrideMaterial(\"edgeMaterial\", _renderer.getEdgeMaterial());\n\n    //just meant to do an initial clear to the background color we want.\n    _renderer.beginScene(this.scene, this.camera, this.noLights, true);\n\n    _renderer.composeFinalFrame(true, isIE11 /* TS: are you kidding me */);\n    this.api.addEventListener(et.MODEL_ROOT_LOADED_EVENT, _stdSurfaceLoadListener);\n    this.api.addEventListener(et.MODEL_ROOT_LOADED_EVENT, _onModelRootLoaded);\n  };\n\n  this.getSheetRenderer = function () {\n    if (!_sheetRenderer) {\n      _sheetRenderer = new SheetRenderContext(_this, _renderer, _webglrender, _materials);\n    }\n\n    return _sheetRenderer;\n  };\n\n  this.isSheetRendererNeeded = function () {\n    return !_this.is2d && this.get2DModels().length > 0;\n  };\n\n  this.get2DModels = function () {\n    return _modelQueue.getModels().filter(function (m) {return m.is2d();});\n  };\n\n  this.get3DModels = function () {\n    return _modelQueue.getModels().filter(function (m) {return m.is3d();});\n  };\n\n  //Bridge between the render queue and render context\n  //For passing pieces of model to the renderer during\n  //timed progressive rendering, while also taking into account\n  //the current rendering mode of the viewer\n  function renderSomeCallback(scene) {var _scene$frags;\n\n    //Ideally, here we only want the piece of the\n    //render function that specifically renders geometries,\n    //and none of the camera update stuff that we already do\n    //once in beginProgressive() -- but this requires\n    //some refactoring of THREE.WebGLRenderer.\n    var is2DScene = (_scene$frags = scene.frags) === null || _scene$frags === void 0 ? void 0 : _scene$frags.is2d;\n    var phase = _rcs.phase;\n    var wantColor = true;\n    var wantSAO = phase == RenderFlags.RENDER_NORMAL;\n    var wantID = _renderer.settings.idbuffer && phase != RenderFlags.RENDER_HIDDEN;\n\n    // Set edge color/opacity differently for main rendering and ghosted shapes\n    var edgeColor = phase == RenderFlags.RENDER_HIDDEN ? _this.edgeColorGhosted : _this.edgeColorMain;\n    _renderer.setEdgeColor(edgeColor);\n\n    if (phase == RenderFlags.RENDER_HIDDEN)\n    scene.overrideMaterial = _this.fadeMaterial;else\n    if (phase == RenderFlags.RENDER_HIGHLIGHTED)\n    scene.overrideMaterial = _this.highlightMaterial;\n\n    var event = {\n      type: et.RENDER_SCENE_PART,\n      scene: scene, wantColor: wantColor, wantSAO: wantSAO, wantID: wantID,\n      context: _renderer };\n\n\n    _this.api.dispatchEvent(event);\n\n    if (!_this.is2d && is2DScene) {\n      _this.getSheetRenderer().renderScenePart(scene, wantColor, wantSAO, wantID);\n    } else {\n      _renderer.renderScenePart(scene, wantColor, wantSAO, wantID);\n    }\n\n    scene.overrideMaterial = null;\n\n  }\n\n  function updateFPS(highResTimeStamp) {\n    _frameTimeSamples++;\n\n    if (_lastHighResTimeStamp <= highResTimeStamp && _lastHighResTimeStamp > 0) {\n      _frameTimeAvg = _frameTimeAvg * 0.8 + (highResTimeStamp - _lastHighResTimeStamp) * 0.2;\n    }\n\n    if (_this.fpsCallback)\n    _this.fpsCallback(_this.fps());\n  }\n\n  function updateAnimations(highResTimeStamp) {\n    if (_this.keyFrameAnimator) {\n      var delta = _lastHighResTimeStamp > 0 ? (highResTimeStamp - _lastHighResTimeStamp) / 1000 : 0;\n      var updateFlags = _this.keyFrameAnimator.update(delta);\n      if (updateFlags) {\n        _this.sceneUpdated(true);\n        if (updateFlags & _this.keyFrameAnimator.UPDATE_CAMERA)\n        return true;\n      }\n    }\n    return false;\n  }\n\n  function updateCanvasSize(noEvent) {\n    if (_needsResize) {\n      _this.canvasBoundingclientRectDirty = true;\n      _this.camera.aspect = _newWidth / _newHeight;\n      _this.camera.clientWidth = _newWidth;\n      _this.camera.clientHeight = _newHeight;\n      _renderer.setSize(_newWidth, _newHeight);\n      _this.controls.handleResize();\n      if (_groundReflection)\n      _groundReflection.setSize(_newWidth, _newHeight);\n      if (_sheetRenderer) {\n        // Uses the size of the attached renderContext (impl's _renderer, by default)\n        _sheetRenderer.setSize();\n      }\n      _this.invalidate(true, true, true);\n      _needsResize = false;\n      if (!noEvent) {\n        _this.api.dispatchEvent({\n          type: et.VIEWER_RESIZE_EVENT,\n          width: _newWidth,\n          height: _newHeight });\n\n      }\n    }\n  }\n\n  this.renderGroundShadow = function (target) {\n\n    // If shadow maps are active, we don't use _groundShadow for the ground. Instead, the ground is\n    // rendered using the shadow map as well.\n    if (_shadowMaps) {\n      if (_shadowMaps.state == shadow.SHADOWMAP_VALID) {\n        _shadowMaps.renderGroundShadow(_this.camera, target || _renderer.getColorTarget());\n      }\n    } else {\n      _groundShadow.renderShadow(_this.camera, target || _renderer.getColorTarget());\n      _groundShadow.rendered = true;\n    }\n  };\n\n  // Set any information needed for the ground plane reflection, drop shadow, or shadow map projection\n  function updateGroundTransform() {\n    // if we're not using the ground shadow or reflection, or it's a 2D drawing, return\n    if (!_groundShadow.enabled && !_groundReflection || _this.is2d)\n    return;\n\n    // Get the box of all the scene's data\n    var groundBox;\n    if (_this.model && !_this.model.isLoadDone()) {\n      groundBox = _this.model.getData().bbox;\n    } else\n    {\n      groundBox = _this.getVisibleBounds(true, false);\n    }\n    // If there's nothing to see, return\n    if (!groundBox)\n    return;\n\n    var camera = _this.camera;\n    var bbox = groundBox.clone();\n\n    var rightAxis = new THREE.Vector3(1, 0, 0);\n\n    var shadowDir = _shadowLightDir.clone();\n\n    // Transform bbox, rightAxis, and shadowDir using worldUpTransform. For the resulting box, we\n    // can safely assume that y is the up-direction\n    if (camera.worldUpTransform) {\n      bbox.applyMatrix4(camera.worldUpTransform);\n      rightAxis.applyMatrix4(camera.worldUpTransform);\n      shadowDir.applyMatrix4(camera.worldUpTransform);\n    }\n\n    // expand the box downwards by 0.5%. The effect of this is just that the\n    // ground plane does not touch the world box, but is slightly below it\n    bbox.min.y -= 0.005 * (bbox.max.y - bbox.min.y);\n\n    if (_shadowMaps) {\n      _shadowMaps.expandByGroundShadow(bbox, shadowDir);\n    }\n\n    // get size and center\n    var bsize = bbox.size();\n    var bcenter = bbox.center();\n\n    // apply some adjustments specific for drop-shadow\n    if (!_shadowMaps) {\n      // add some horizontal margin so that blurring is not clipped at the boundaries\n      bsize.x *= 1.25;\n      bsize.z *= 1.25;\n\n      // expand to square, because the texture is squared as well\n      bsize.x = bsize.z = Math.max(bsize.x, bsize.z);\n    }\n\n    // Rotate center back to world-coords.\n    if (camera.worldUpTransform) {\n      var worldUpInverse = new THREE.Matrix4().getInverse(camera.worldUpTransform);\n      bcenter.applyMatrix4(worldUpInverse);\n\n      // Note that we leave size vector as it is. I.e., only the center is transformed back to world-coords.\n      // The size vector keeps as it is, i.e. the bbox defined by (center, size) is still aligned with\n      // the rotated axes. In other worlds\n      //  - size.x is the extent along worldUpTransform * (1,0,0) = rightAxis\n      //  - size.y is the extent along worldUpTransform * (0,1,0) = camera.worldUp\n      //  - size.z is the extent along worldUpTransform * (0,0,1)\n    }\n\n    _groundShadow.setTransform(\n    bcenter,\n    bsize,\n    camera.worldup,\n    rightAxis);\n\n\n    if (_groundReflection) {\n      var groundPos = new THREE.Vector3().subVectors(bcenter, camera.worldup.clone().multiplyScalar(bsize.y / 2));\n      _groundReflection.setTransform(groundPos, camera.worldup, bsize);\n    }\n\n    if (_shadowMaps) {\n      _shadowMaps.setGroundShadowTransform(bcenter, bsize, camera.worldup, rightAxis);\n    }\n  }\n\n  function updateScene() {\n    if (_sceneDirty) {\n      // If the model had changed, the ground-plane, etc., may have changed, so recompute\n      updateGroundTransform();\n      _groundShadow.setDirty();\n      _sceneDirty = false;\n      return true;\n    } else {\n      return false;\n    }\n  }\n\n  function updateOverlays(highResTimeStamp) {\n\n    //Update the selection set cloned meshes\n    for (var id in _this.selectionMeshes) {\n\n      var m = _this.selectionMeshes[id];\n      if (m.model) {\n        var fragList = m.model.getFragmentList();\n\n        // If the proxy uses original geometry of the fragment, update its matrix.\n        // If the geometry does not match, it is a consolidated or instanced mesh.\n        // For these, the matrix is already baked into vertex buffer or\n        // index buffer. We don't support animation for these.\n        if (m.geometry === fragList.getGeometry(m.fragId)) {\n          fragList.getWorldMatrix(m.fragId, m.matrix);\n        }\n      }\n    }\n\n  }\n\n  function invalidateShadowMap() {\n    if (_shadowMaps) {\n      _shadowMaps.state = shadow.SHADOWMAP_NEEDS_UPDATE;\n    }\n  }\n\n  var _screenDrawnFlags = {\n    NOTHING_DRAWN: 0,\n    MODEL_DRAWN: 1,\n    BACKGROUND_DRAWN: 2,\n    OVERLAY_DRAWN: 4,\n    REFLECTION_DRAWN: 8,\n    ALL_DRAWN: 15 };\n\n\n  // The render command system is what actually does the render. The idea here is that each tick() checks if anything causes a new\n  // render. If so, then we make a new list of commands to perform, then start performing them. For a full render without interruptions,\n  // this is overkill - we could just lockstep execute them all. Where the command list comes into its own is that it can be continued.\n  // For progressive rendering we want \n  // Rather than pepper the rendering sequence of the code with lots of \"if\" statements that\n  function RenderCommandSystem() {\n    this.highResTimeStamp = -1;\n    // did something get rendered that would change the screen (almost always true when rendering occurs)?\n    this.screenDrawn = _screenDrawnFlags.NOTHING_DRAWN;\n    // did a Present get done?\n    this.screenHasChanged = false;\n    // how much time we are given to render things during each execution, in ms.\n    this.frameBudget = 0;\n    // how much time we have left to render stuff during this tick(), in ms.\n    this.frameRemaining = 0;\n    // what type of render is happening currently\n    this.phase = RenderFlags.RENDER_NORMAL;\n    // show the amount of the scene rendered. TODO this doesn't really work right with ghosting or shadow mapping on, as those also affect it.\n    this.signalProgressByRendering = false;\n\n    // How many ticks have executed the current command list. Good for knowing if we're on the first frame (tick 0).\n    this.tickCount = 0;\n    // average time spent rendering a tick() TODO - needs to be revisited and thought through: if a batch is not loaded, it displays really fast!\n    this.beginFrameAvg = 0;\n    // exactly what it says, the time stamp passed in on the previous tick().\n    this.lastBeginFrameTimeStamp = 0;\n\n    // various types of rendering\n    this.RENDERMODE_FULL = 0;\n    this.RENDERMODE_PROGRESSIVE = 1;\n    this.RENDERMODE_SILENT = 2;\n    // type of rendering being done.\n    this.renderType = this.RENDERMODE_FULL;\n\n    // First frame budget\n    // If it's progressive and the first frame, try to finish the ground shadow in the allocated time\n    this.INITIAL_GROUND_SHADOW = 0.2;\n\n    // Internal command iterator state\n    // is there a command list to execute?\n    this.cmdListActive = false;\n    // what command we are executing\n    this.cmdIndex = 0;\n    // was execution terminated for this tick()?\n    this.continueExecution = true;\n    // are there \"CMD_ALWAYS_DO\" commands in the command list? If so, we need to traverse the whole command list each tick.\n    this.encounteredAlwaysDo = false;\n    // did the full render finish? If not, then ignore overlay and present updates until it has\n    this.finishedFullRender = true;\n    // did the ground shadow get computed in the post-process for deferred rendering?\n    this.groundShadowInPost = false;\n    // did any previous or current frame trigger the overlay to be drawn?\n    this.drawOverlay = false;\n\n    // true means parameters can be set on the command\n    this.cmdIsOpen = false;\n\n    // how long the array is (so that if new commands/params are needed, they get allocated first).\n    this.allocArraySize = 0;\n    // how many commands are in the active command list\n    this.cmdListLength = 0;\n    // the command and parameters set for the command\n    this.cmdList = [];\n    this.paramList = [];\n\n    // command states\n    this.CMD_NORMAL_SEQUENCE = 0;\n    this.CMD_DO_AFTER = 1;\n    this.CMD_ALWAYS_DO = 2;\n\n    this.isActive = function () {\n      return this.cmdListActive;\n    };\n\n    this.setFrame = function (timeBudget) {\n      this.frameBudget = timeBudget;\n    };\n\n    // signal the beginning of a new set of commands\n    this.beginCommandSet = function () {\n      this.cmdListActive = true;\n      this.cmdIndex = 0;\n      this.cmdListLength = 0;\n      this.encounteredAlwaysDo = false;\n      this.tickCount = 0;\n      this.screenDrawn = _screenDrawnFlags.NOTHING_DRAWN;\n      this.screenHasChanged = false;\n    };\n\n    // signal the end\n    this.endCommandSet = function () {\n      if (this.cmdIsOpen) {\n        this.cmdIsOpen = false;\n        // close previous command - really, increment just to get the final count\n        this.cmdListLength++;\n      }\n    };\n\n    // Set the parameter on the currently-executed parameter. Meant for the commands above.\n    this._internalSetParam = function (indexString, val) {\n      this.paramList[this.cmdIndex][indexString] = val;\n    };\n\n\n    this.addCommand = function (func, executionLevel) {\n      if (this.cmdIsOpen) {\n        // close previous command\n        this.cmdListLength++;\n      }\n      this.cmdIsOpen = true;\n      while (this.allocArraySize <= this.cmdListLength) {\n        this.cmdList[this.cmdListLength] = {};\n        this.paramList[this.cmdListLength] = {};\n        this.allocArraySize++;\n      }\n      this.cmdList[this.cmdListLength] = func;\n      this.paramList[this.cmdListLength].executionLevel = executionLevel || this.CMD_NORMAL_SEQUENCE;\n      this.encounteredAlwaysDo = this.encounteredAlwaysDo || executionLevel === this.CMD_ALWAYS_DO;\n\n      // return value so if we want to jump to this command, we know where to go.\n      return this.cmdListLength;\n    };\n\n    // note that we're a bit sloppy with parameter setting. Since the parameter set at an index location\n    // gets reused, you may see parameters in the parameter object that have nothing to do with this\n    // command, since this parameter set might have been used for another command at some other time.\n    // Basically, if a command doesn't use the parameter, then ignore it.\n    this.setParam = function (indexString, val) {\n      if (this.cmdIsOpen) {\n        this.paramList[this.cmdListLength][indexString] = val;\n      } else {\n        if (ENABLE_DEBUG) {\n          logger.error(\"ERROR: cannot set param when no command is open!\");\n        }\n      }\n    };\n\n    // This method is meant for use during execution of a command, so gets the parameter from the currently-active command.\n    this.getParam = function (indexString) {\n      if (ENABLE_DEBUG) {\n        if (this.paramList[this.cmdIndex][indexString] === undefined) {\n          logger.error(\"ERROR: parameter \" + indexString + \" was never set for this command! Go fix it.\");\n        }\n      }\n      return this.paramList[this.cmdIndex][indexString];\n    };\n\n    // return true if done running all commands.\n    this.executeCommandList = function () {\n      if (_rcs.cmdListActive) {\n        // go through command list, interrupting as needed.\n\n        // If we do more than one tick for the rendering, then turn\n        // off the average frame calculation in cmdBeginScene.\n        if (this.tickCount > 0)\n        _rcs.lastBeginFrameTimeStamp = 0;\n\n        // set frame budget\n        this.frameRemaining = this.frameBudget;\n\n        if (ENABLE_DEBUG) {\n          // reality check\n          if (this.cmdIsOpen) {\n            logger.error(\"ERROR: should call endCommandSet before executing\");\n          }\n        }\n        this.continueExecution = true;\n        var restartIdx;\n        // not at end of command list? We always go through the whole command list, as there may be \"always do\"\n        // commands, such as a Present().\n\n        if (ENABLE_DEBUG_RCS) {\n          if (this.tickCount === 0) {console.log(\"===================\");}\n          console.log(\"Running commands for \" + (_rcs.renderType === _rcs.RENDERMODE_PROGRESSIVE ? \"progressive\" :\n          _rcs.renderType === _rcs.RENDERMODE_FULL ? \"full\" : \"silent\") +\n          \" render, for tick count \" + this.tickCount);\n        }\n\n        // Are there any \"always do\" commands in this command set, that must be done before we continue our command sequence?\n        // Currently needed by smooth navigation, to turn off AO during the render sequence.\n        if (this.encounteredAlwaysDo) {\n          var idx = 0;\n          while (idx < this.cmdIndex) {\n            // Is this a command we should always do?\n            if (this.paramList[idx].executionLevel >= _rcs.CMD_ALWAYS_DO) {\n              // Commands we always do are assumed to never abort, so we don't check for failure.\n              if (ENABLE_DEBUG_RCS) {console.log(\"  ALWAYS DO command \" + idx + \": \" + this.cmdList[idx].name);}\n              this.cmdList[idx]();\n            }\n            idx++;\n          }\n        }\n\n        while (this.cmdIndex < this.cmdListLength) {\n          // if we are to continue execution, easy;\n          // if not, then check if the next command is an \"always do after\", such as a Present().\n          if (this.continueExecution ||\n          this.paramList[this.cmdIndex].executionLevel >= _rcs.CMD_DO_AFTER) {\n            // we're supposed to execute this command, so do it and see what it says\n            if (ENABLE_DEBUG_RCS) {console.log(\"  command \" + this.cmdIndex + \": \" + this.cmdList[this.cmdIndex].name + \" and \" + _rcs.frameRemaining + \" frame budget remaining\");}\n\n            if (this.cmdList[this.cmdIndex]()) {\n              // true means stop executing, out of time (typically),\n              // so restart execution at this command the next tick()\n              if (ENABLE_DEBUG_RCS) {console.log(\"  >>> out of tick time with \" + _rcs.frameRemaining);}\n              restartIdx = this.cmdIndex;\n              // signal to not execute any \"normal sequence\" commands for the rest of the command list.\n              this.continueExecution = false;\n            }\n          }\n          // Go to next command until we hit the end of the list;\n          // we always continue, since there could be \"always do\" or \"do after\"\n          // commands in the list that need to be executed.\n          this.cmdIndex++;\n        }\n\n        // out of time or aborted for some other reason? We'll be back later...\n        if (this.continueExecution) {\n          // did all commands, so we're done\n          this.cmdListActive = false;\n        } else {\n          // set where to continue the work next tick()\n          this.cmdIndex = restartIdx;\n        }\n        this.tickCount++;\n\n        return !this.continueExecution;\n      } else {\n        // If we finish the rendering, then turn\n        // off the average frame calculation in cmdBeginScene.\n        _rcs.lastBeginFrameTimeStamp = 0;\n\n        // not active, so \"done\"\n        return true;\n      }\n    };\n  }\n\n  // Here's the system:\n  // If ground shadow is done - well, that's easy, just blit it before beauty pass\n  // If not done\n  // \tIf we are doing a full render\n  //     Render the whole shadow first (possibly tick limited), blit it to screen, then continue to beauty pass\n  //     Else we are doing progressive\n  //        if this is the first frame:\n  //           if the number of objects in the scene is low (10?),\n  //              render the drop shadow, figuring we can rendering the rest of the scene in a single frame\n  //           else\n  //              don't bother rendering anything in later ticks (we used to waste time rendering a few each tick)\t\n  //        if this is a later frame:\n  // \t\t\t render just the beauty pass, until done. Don't bother with the shadow now, as it won't get used.\n  //        When we get to the end of progressive:\n  //           If needed, render the ground shadow until done. Once done, signal that a re-render is needed.\n  function cmdGenerateGroundShadow() {\n    // three cases: full render, quick out for progressive, continue as possible for progressive.\n    if (_rcs.renderType === _rcs.RENDERMODE_PROGRESSIVE) {\n      if (_rcs.getParam(\"GenerateGroundShadow.afterBeauty\")) {\n        // Rendering the ground shadow after all progressive rendering is done. Signal redraw if it finishes.\n        _rcs.frameRemaining = _groundShadow.prepareGroundShadow(_this.modelQueue(), 0, _rcs.frameRemaining);\n        // was this the call that rendered it fully?\n        if (_groundShadow.getStatus() == GroundFlags.GROUND_RENDERED) {\n          // Do we need to rerender? This needs to happen if we're not using reflection insertion.\n          // TODO: someday perhaps make ground shadows more \"full featured\" and merge behind, like ground reflections do?\n          if (_rcs.getParam(\"GenerateGroundShadow.signalRedraw\")) {\n            _this.requestSilentRender();\n            if (ENABLE_DEBUG_RCS) {\n              console.log(\" $$$$ SIGNAL FULL GROUND SHADOW REDRAW\");\n            }\n            // don't need to continue, since we know we need to fully redraw on next tick\n            return true; // TODO could signal abort rest of command stream, since we know we invalidate. It's just a bit inefficient otherwise.\n          }\n          // note for ground reflection, so it can decide on deferred silent rendering.\n          _rcs.groundShadowInPost = true;\n        }\n      } else {\n        // If this is the first frame, try to render the drop shadow in a small amount of time.\n        // Else, don't waste time on the drop shadow.\n        if (_rcs.tickCount === 0) {\n          // render 10 objects TODO - expose 10 as some other number?\n          //_rcs.frameRemaining = \n          _groundShadow.prepareGroundShadow(_this.modelQueue(), 10);\n          // TODO or this way, which does possibly give flicker:\n          //_rcs.frameRemaining = _groundShadow.prepareGroundShadow(_this.modelQueue(), _rcs.frameRemaining, _rcs.INITIAL_GROUND_SHADOW);\n          //var minRemaining = _rcs.frameBudget * (1-_rcs.INITIAL_GROUND_SHADOW);\n          //if ( _rcs.frameRemaining < minRemaining ) {\n          //     _rcs.frameRemaining = minRemaining;\n          //}\n        }\n      }\n    } else {\n      // full render, just do it fully.\n      _rcs.frameRemaining = _groundShadow.prepareGroundShadow(_this.modelQueue(), 0, _rcs.frameRemaining);\n    }\n\n    // rendering can continue if there's time left\n    return _rcs.frameRemaining < 0 && _groundShadow.getStatus() === GroundFlags.GROUND_UNFINISHED;\n  }\n\n  function cmdBlitGroundShadow() {\n    //Render the ground shadow after screen clear\n    if (_groundShadow.getStatus() !== GroundFlags.GROUND_UNFINISHED)\n    _this.renderGroundShadow();\n    return false;\n  }\n\n  function cmdGenerateGroundReflection() {\n    // three cases: full render, quick out for progressive, continue as possible for progressive.\n    if (_rcs.renderType === _rcs.RENDERMODE_PROGRESSIVE) {\n      // is this pass happening after the beauty pass is completed?\n      if (_rcs.getParam(\"GenerateGroundReflection.afterBeauty\")) {\n        // Rendering the ground reflection after all progressive rendering is done.\n        _rcs.frameRemaining = _groundReflection.prepareGroundReflection(_groundShadow, _this, false, 0, _rcs.frameRemaining);\n        // was this the call that rendered it fully?\n        if (_groundReflection.getStatus() == GroundFlags.GROUND_RENDERED) {\n          _rcs.screenDrawn |= _screenDrawnFlags.REFLECTION_DRAWN;\n          // If we're done, we should also check to see if a silent render is needed for ground shadows.\n          // If ground shadows were finished in these post-render passes (rare - only on animation or explode,\n          // for complex scenes), transparent objects in the scene will not show the shadows properly through\n          // their transparent objects, LMV-2508.\n          // TODO - nicer still would be to see if the scene actually has any transparent objects. If not,\n          // then we don't need this separate re-render.\n          // TODO Also, note this isn't a perfect system: in practice you really want to have the ground reflection\n          // entirely done before rendering atop it, so that what is seen through transparent objects is fully\n          // folded in. However, this problem is much less obvious in the scenes tested - missing ground shadows\n          // are more obvious.\n          if (_rcs.groundShadowInPost && _materials.hasTransparentMaterial()) {\n            _this.requestDeferredSilentRender();\n          }\n        }\n      } else {\n        // If this is the first frame, try to render the reflection in a small amount of time.\n        // Else, don't waste time on the reflection.\n        if (_rcs.tickCount === 0) {\n          // render 10 objects TODO - expose 10 as some other number? Or use a budget? Or...?\n          //_rcs.frameRemaining =\n          _groundReflection.prepareGroundReflection(_groundShadow, _this, true, 10);\n          // TODO or this way, which does possibly give flicker:\n          //_rcs.frameRemaining = _groundReflection.prepareGroundReflection(_this.modelQueue(), _rcs.frameRemaining, _rcs.INITIAL_GROUND_SHADOW);\n          //var minRemaining = _rcs.frameBudget * (1-_rcs.INITIAL_GROUND_SHADOW);\n          //if ( _rcs.frameRemaining < minRemaining ) {\n          //     _rcs.frameRemaining = minRemaining;\n          //}\n        }\n      }\n    } else {\n      // full render, just do it fully.\n      _rcs.frameRemaining = _groundReflection.prepareGroundReflection(_groundShadow, _this, false, 0, _rcs.frameRemaining);\n    }\n\n    // rendering can continue if there's time left, or if we actually finished display and should present, even though we're out of time.\n    // TODO we could revise commands to be of \"takes time\" and \"doesn't take time\", so that we abort if and only if we're out of time\n    // and hit a \"takes time\" command.\n    return _rcs.frameRemaining < 0 && _groundReflection.getStatus() === GroundFlags.GROUND_UNFINISHED;\n  }\n\n  /**\n     * Progressive update of the shadow map:\n     *\n     *   a) For small models that can be rendered within a single frame, the shadow map will always be rendered first,\n     *      so that shadows will not flicker on and off during animations, on scene changes, or when changing the light direction.\n     *   b) For large models, seeing something is more important than shadows. Therefore, we render without shadows\n     *      first and only do work on the shadow map if everything else is finished.\n     *\n     *  Whether we take a) or b) is determined on-the-fly: We use a) if we succeed updating the whole ShadowMap\n     *  within a single frame time budget.\n     */\n  function cmdUpdateShadowMap() {\n\n    // We are either starting an update of the shadow map, or are continuing to render it in this tick.\n\n    // This section is always entered in the first frame if the shadow map is not available yet.\n    if (_shadowMaps.state === shadow.SHADOWMAP_NEEDS_UPDATE) {\n\n      // start shadow map update. This call may end in two ways:\n      //  - In case a), the shadowmap could already be finished within the startUpdate() call. Therefore, the\n      //    shadow map will already be available and will be used in this frame.\n      //    In this case, there is nothing more to do and all subsequent calls to updateShadowMap will\n      //    do nothing.\n      //  - in case b), the shadow map is not available. In this case, we first wait until the rendering\n      //    without shadows is finished. (see next section)\n      _rcs.frameRemaining = _shadowMaps.startUpdate(_modelQueue, _rcs.frameRemaining, _this.camera, _shadowLightDir, _materials);\n\n    } else if (_shadowMaps.state == shadow.SHADOWMAP_INCOMPLETE) {\n\n      // continue shadow map update as long as we have time\n      _rcs.frameRemaining = _shadowMaps.continueUpdate(_modelQueue, _rcs.frameRemaining, _materials);\n\n      // if we're done and this is a progressive render, then this shadow generation is happening at the end.\n      // In such a case we need to re-render (similar to ground shadows and reflections).\n      if (_shadowMaps.state == shadow.SHADOWMAP_VALID) {\n\n        // TODO - may wish to make this a deferred silent render, so that reflection etc. is completed, then shadows come in later.\n        _this.requestSilentRender();\n        if (ENABLE_DEBUG_RCS) {\n          console.log(\" $$$$ SIGNAL FULL SHADOW MAP REDRAW\");\n        }\n        // don't need to continue, since we know we need to fully redraw on next tick\n        return true; // TODO could signal abort rest of command stream, since we know we invalidate. It's just a bit inefficient otherwise.\n      }\n    }\n    return _rcs.frameRemaining < 0.0 && _shadowMaps.state !== shadow.SHADOWMAP_VALID;\n  }\n\n  function cmdResetShadowMap() {\n    _shadowMaps.state = shadow.SHADOWMAP_NEEDS_UPDATE;\n  }\n\n  function cmdBeginScene() {\n    if (_rcs.signalProgressByRendering)\n    _this.signalProgress(0, ProgressState.RENDERING); //zero out the progress bar for when rendering begins\n\n    if (_rcs.renderType === _rcs.RENDERMODE_PROGRESSIVE) {\n      //Measure actual frame time between two consecutive initial frames.\n      //This is used to correct measured per-scene times to what they actually take\n      //once the async processing of the graphics thread is taken into account.\n      if (_rcs.lastBeginFrameTimeStamp > 0) {\n        var delta = _rcs.highResTimeStamp - _rcs.lastBeginFrameTimeStamp;\n        _rcs.beginFrameAvg = 0.75 * _rcs.beginFrameAvg + 0.25 * delta;\n      }\n      _rcs.lastBeginFrameTimeStamp = _rcs.highResTimeStamp;\n\n      //Adjust frame time allowance based on actual frame rate,\n      //but stay within the given boundaries.\n      if (_rcs.beginFrameAvg < TARGET_FRAME_TIME && _rcs.frameBudget < MAX_FRAME_BUDGET) {\n        _this.targetFrameBudget += 1;\n        if (_this.targetFrameBudget > MAX_FRAME_BUDGET) {\n          _this.targetFrameBudget = MAX_FRAME_BUDGET;\n        }\n      } else\n      if (_rcs.beginFrameAvg > TARGET_FRAME_TIME && _rcs.frameBudget > MIN_FRAME_BUDGET) {\n        _this.targetFrameBudget *= 0.75 + 0.25 * TARGET_FRAME_TIME / _rcs.beginFrameAvg;\n        if (_this.targetFrameBudget < MIN_FRAME_BUDGET) {\n          _this.targetFrameBudget = MIN_FRAME_BUDGET;\n        }\n      }\n    }\n\n    // clear the color and depth targets\n    var clear = _rcs.getParam(\"BeginScene.clear\");\n    _renderer.beginScene(_this.scene, _this.camera, _this.lightsOn ? _this.lights : _this.no_lights, clear);\n    if (_this.isSheetRendererNeeded()) {\n      _this.getSheetRenderer().beginScene(_this.scene, _this.camera, _this.no_lights);\n    }\n\n    if (clear) {\n      _rcs.screenDrawn |= _screenDrawnFlags.BACKGROUND_DRAWN;\n    }\n\n    // Check if the camera changed, and if so, signal.\n    if (_rcs.getParam(\"BeginScene.signalCameraChanged\")) {\n      // Tells view cube to update, for example.\n      _this.api.dispatchEvent(_this.cameraChangedEvent);\n    }\n\n    return false;\n  }\n\n  function cmdBeginPhase() {\n    // If nothing is highlighted just skip the highlighted phase\n    _rcs.phase = _rcs.getParam(\"BeginPhase.phase\");\n    if (ENABLE_DEBUG_RCS) {\n      console.log(\"     render phase is now \" + _rcs.phase);\n    }\n\n    // Start rendering the scene by resetting the rendering queue.\n    // This sets up the view frustum intersector and begins scene iteration.\n    _modelQueue.reset(_this.camera, _rcs.phase, _rcs.getParam(\"BeginPhase.moved\"), _materials.getCutPlanes());\n\n    return false;\n  }\n\n  function cmdMainRender() {\n    if (!_modelQueue.isEmpty() && !_modelQueue.isDone()) {\n\n      _rcs.screenDrawn |= _screenDrawnFlags.MODEL_DRAWN;\n\n      //Render some geometry with the current render mode (highlighted, normal, or ghosted)\n      _rcs.frameRemaining = _modelQueue.renderSome(renderSomeCallback, _rcs.frameRemaining);\n\n      // TODO - cmdMainRender gets used by a number of systems - what sort of progress should really happen here?\n      if (_rcs.signalProgressByRendering) {\n        _this.signalProgress(100.0 * _modelQueue.getRenderProgress(), ProgressState.RENDERING);\n        if (ENABLE_DEBUG_RCS) {\n          console.log(\"  %%% percent done \" + 100 * _modelQueue.getRenderProgress());\n        }\n      }\n    }\n    // if there is time left, continue on (return false), else return true, which means \"stop for now\"\n    return !_modelQueue.isDone();\n  }\n\n  // render sectioning, if any, and any additional buffers needed, such as ID.\n  function cmdSceneAfterRender() {\n    _rcs.phase = RenderFlags.RENDER_FINISHED;\n    _renderer.renderScenePart(_this.sceneAfter, true, true, true);\n\n    // TODO: bad, renderScenePart does not return the amount of time used to render. It should, so we know the remaining budget.\n    // TODO: to be honest, we should actually do a performance.now() at the beginning of any command list set, and\n    // use *that* to track the time truly remaining. highResTimeStamp that is passed in is not trustworthy. But there's also the\n    // \"average batch time\" that gets set, to minimize flicker. A creaky system that works, mostly.\n    return false;\n  }\n\n  function cmdFinishAllRendering() {\n    // in case some system is querying the phase\n    _rcs.phase = RenderFlags.RENDER_FINISHED;\n\n    return false;\n  }\n\n  function cmdSignalProcessingDone() {\n    //if (_rcs.signalProgressByRendering)\n    _this.signalProgress(100.0, ProgressState.RENDERING);\n  }\n\n  function cmdRenderOverlays() {\n    // Render selection highlight / pivot / HUD overlays and other overlay geometry\n    // This is stuff that goes into the separate overlay render buffer. It does rely on the z-buffer being properly populated,\n    // so is normally rendered after the beauty pass (or highlighting pass) is performed. As such, we need to rerender it on\n    // every progressive pass.\n\n    // If there was an overlay dirty (i.e., someone hovered over something in the middle of a progressive render), note that the\n    // overlay must now be drawn from here on out.\n    if (_this.isOverlayDirty()) {\n      // avoid having successive passes \n      _this.clearOverlayDirtyFlag();\n      _rcs.drawOverlay = true;\n    }\n\n    // draw if needed\n    if (_rcs.drawOverlay) {\n\n      // If there is geometry, and we're done rendering it, OR we need to always render the overlay while moving, make the overlay\n      if (!_modelQueue.isEmpty() && _modelQueue.isDone() || _this.showOverlaysWhileMoving) {\n        _this.renderOverlays();\n        _rcs.screenDrawn |= _screenDrawnFlags.OVERLAY_DRAWN;\n      } else {\n        // overlay update not needed (no geometry, or to be done only at end): clear once, and turn off drawing it since we need to clear only once.\n        _renderer.clearAllOverlays();\n        _rcs.drawOverlay = false;\n      }\n    }\n\n    return false;\n  }\n\n  // if we're fading in the rollover highlight, we just need to compose the final frame.\n  // This command forces PostAndPresent to happen.\n  function cmdForcePresent() {\n    _rcs.screenDrawn |= _screenDrawnFlags.ALL_DRAWN;\n  }\n\n  function cmdPostAndPresent() {\n    //Run post-processing and present to the front buffer\n    if (_rcs.screenDrawn && (\n    // present if we're done rendering, or if progressive and this is a displayable frame\n    _rcs.phase === RenderFlags.RENDER_FINISHED || _rcs.tickCount % _this.frameDisplayRate === 0)) {\n      // Skip AO if we clear the screen and nothing else was drawn, or if\n      // it was disabled when we created the command list.\n      var skipAO = !_rcs.getParam(\"PostAndPresent.performAO\") ||\n      (_rcs.screenDrawn & (_screenDrawnFlags.BACKGROUND_DRAWN | _screenDrawnFlags.MODEL_DRAWN)) == _screenDrawnFlags.BACKGROUND_DRAWN;\n      // present image\n      _renderer.composeFinalFrame(skipAO);\n      _rcs.screenHasChanged = true;\n      // reset\n      _rcs.screenDrawn = _screenDrawnFlags.NOTHING_DRAWN;\n\n      updateFPS(_rcs.highResTimeStamp);\n\n      _this.api.dispatchEvent({ type: et.RENDER_PRESENTED_EVENT });\n    }\n\n    return false; // TODO - could actually measure time at this point\n  }\n\n  // Smooth navigation overrides\n  // TODO - I don't really like toggle SAO off and on during a single tick, it is a little\n  // costly (how much?), but it's the safest option.\n  function cmdSuppressAO() {\n    if (ENABLE_DEBUG) {\n      if (_renderer.getAOEnabled() === false) {\n        // AO should be on and we should be suppressing it.\n        logger.error(\"AO should be on at this point!\");\n      }\n    }\n    _renderer.setAOEnabled(false);\n    return false;\n  }\n  function cmdRestoreAO() {\n    if (ENABLE_DEBUG) {\n      if (_renderer.getAOEnabled() === true) {\n        // AO should be off and we should be restoring it.\n        logger.error(\"AO should be off at this point!\");\n      }\n    }\n    _renderer.setAOEnabled(true);\n    return false;\n  }\n  function cmdSignalRedraw() {\n    _this.requestSilentRender();\n    return false;\n  }\n  function cmdFinishedFullRender() {\n    _rcs.finishedFullRender = true;\n    return false;\n  }\n\n  //Main animation loop -- update camera,\n  //advance animations, render if needed.\n  this.tick = function (highResTimeStamp)\n  {\n    // tick() does three main operations:\n    // 1. Determine if anything has changed that would trigger a new render.\n    // 2. If a new render of any sort is needed, set the command system to do it.\n    // 3. Check if there is a command set to run, and if so, run it.\n\n    // TODO We have a high-res time stamp from performance.now(), but, interestingly enough,\n    // it comes in about 100 ticks later than whatever number we get when we call\n    // performance.now() right here. TODO - how's that work? Why this mis-sync?\n\n    _rcs.highResTimeStamp = highResTimeStamp = highResTimeStamp || 0; // TODO sometimes highResTimeStamp is zero. What?\n    _webglrender.updateTimestamp(highResTimeStamp);\n\n    ///////////////////////////////////////////////\n    // Determine if anything has changed that would cause a new render to be performed\n\n    // Texture uploads of newly received textures;\n    // Any texture change causes a full redraw.\n    var res = _materials.updateMaterials();\n    _this.invalidate(res.needsClear, res.needsRender, res.overlayDirty);\n\n    // Perform animations, return true if something animated -- this has to be done\n    // before the scene update below\n    var animationMoved = updateAnimations(highResTimeStamp);\n\n    // update controls (e.g. view cube, home button, orbit, key press) and see if that has affected the view\n    var controlsMoved = _this.controls.update(highResTimeStamp);\n\n    // see if more data was loaded.\n    var sceneChanged = _modelQueue && _modelQueue.update(highResTimeStamp);\n\n    var moved = controlsMoved || animationMoved || _cameraUpdated || sceneChanged;\n    // reset and record state of this frame\n    _cameraUpdated = false;\n    // Did the window resize since last tick?\n    var canvasSizeUpdated = _needsResize;\n    // checks _needsResize to see if an update is needed.\n    updateCanvasSize();\n\n    _needsClear = _needsClear || moved;\n    _overlayDirty = _overlayDirty || moved;\n    //var needsPresent = false;\n\n    var rollover = false;\n    var highlightIntensityChanged = _renderer.overlayUpdate();\n\n    if (_overlayDirty) {\n      // Update the selection set cloned meshes (does no rendering, yet)\n      updateOverlays(highResTimeStamp);\n    } else {\n      // If the overlay is not dirty, fade in the overlay update over time (rollover highlighting becomes stronger).\n      // If the value changes, the _blendPass needs to be redone - the overlay itself did not change, so\n      // does not need to be rerendered.\n      if (highlightIntensityChanged && !_overlayDirty) {\n        // special case where all that is needed is the rollover hightlight blend pass\n        _overlayDirty = rollover = true;\n      }\n      //needsPresent = _renderer.overlayUpdate();\n    }\n\n    // In case loading animation is still in progress, force render.\n    if (this.isLoadingAnimationEnabled() && _lastHighResTimeStamp - _this.lastTime2dGeometryCreated <= _webglrender.getLoadingAnimationDuration()) {\n      _needsRender = true;\n    }\n\n    var memoryLimitedisActive = _this.model && _this.model.loader && _this.model.loader.pagingProxy && _this.model.loader.pagingProxy.getMemoryInfo();\n    _rcs.signalProgressByRendering = _this.model && _this.model.isLoadDone() && !_this.model.isLeaflet() && !memoryLimitedisActive;\n\n    // Has the geometry changed since the last frame?\n    // Note this is not the same as just the camera moving, it indicates\n    // that meshes have changed position, e.g., during explode, animation, etc.\n    // The main effect is that the ground plane and shadow bounds may have changed, so adjust their location and bounds.\n    if (updateScene()) {\n      // if the scene was indeed dirty, we'll need to render from the start\n      _needsClear = true;\n    }\n\n    // If _needsClear is false at this point, nothing changed from outside. However, we might still\n    // have to set _needsClear to true if the previous frame cannot be resumed. This happens when\n    // when we rendered some transparent shapes before all opaque ones were rendered.\n    var somethingChanged = _needsClear;\n    var lastFrameValid = _modelQueue.frameResumePossible();\n    _needsClear = _needsClear || !lastFrameValid;\n\n    ///////////////////////////////////////////////\n    // If a new render of any sort is needed, set the command system to do it.\n    //\n    // Store parameters that should not change on successive ticks, but rather control function.\n    //\n    // Add Command related params:\n    // CMD_ALWAYS_DO - always do, no matter what. Executed every tick.\n    // CMD_DO_AFTER - used in the command loop; if a command times out, any commands immediately after the timeout will be\n    //              executed. This then makes progressive rendering possible: we render, timeout, and the next command(s) such as blend and present will be done.\n    //              If executed, it will be executed again later when we get the next tick.\n    // CMD_NORMAL_SEQUENCE - execute until done, don't come back to it once it's fully executed in the command list.\n\n    // Is there anything at all that triggers a rerender?\n    // if this is an immediate silent render, go do it. Else, check if we're still rendering; if not, then a deferred silent render can launch.\n    _immediateSilentRender = _immediateSilentRender || _deferredSilentRender && !_rcs.cmdListActive;\n    if (_needsClear || _needsRender || _overlayDirty || _immediateSilentRender) {\n\n      // For rendering purposes, rcs.drawOverlay is set true whenever any (new) overlay dirty is noticed during progressive rendering.\n      _rcs.drawOverlay = _overlayDirty;\n\n      // uncomment all code with _spectorDump in order to have Spector.js dump a frame when \"u\" (update) is clicked\n      /* \n      // This version is for Chrome and Firefox's extension.\n      if ( _spectorDump ) {\n          _spectorDump = false;\n          if ( spector ) {\n              spector.clearMarker();\n              spector.captureNextFrame(_this.canvas);\n          }\n      }\n      */\n      /*\n         // This version is for Internet Explorer, which does not support an extension. You must also uncomment the Spector code in Viewer3D.js.\n         if (_spectorDump) {\n             _spectorDump = false;\n             /*\n             // use this and put a break on the jsonInString to grab the capture as text, for compare\n             // (this is a bug in Spector that should be fixed someday - right now IE doesn't allow storing the session)\n             window.spector.onCapture.add(function(capture) {\n                 var jsonInString = JSON.stringify(capture);\n                 // optional, doesn't really work: console.log(jsonInString);\n             });\n             window.spector.startCapture(_this.canvas);\n         }\n         */\n\n      // restart rendering?\n      if (_needsClear || _needsRender || _immediateSilentRender) {\n\n        // There are three types of render:\n        // 1) full render - not (currently) interruptible, runs until completion, \"locks\" application\n        // 2) progressive render - show a bit more each tick, runs unless interrupted by a move, control, etc.\n        // 3) silent render - a full render that is done unless interrupted. Display at end if not interrupted by any other render request.\n        var frameBudget;\n        var movedStatus = somethingChanged ? ResetFlags.RESET_RELOAD : ResetFlags.RESET_NORMAL;\n        if (_needsClear || _needsRender) {\n          if (_this.progressiveRender) {\n            _rcs.renderType = _rcs.RENDERMODE_PROGRESSIVE;\n            frameBudget = _this.targetFrameBudget;\n          } else {\n            _rcs.renderType = _rcs.RENDERMODE_FULL;\n            // How much time to spend rendering the data; 1e10 is an arbitrarily large number of milliseconds, i.e., progressive is off\n            frameBudget = _this.interruptBudget;\n          }\n\n          if (_needsClear) {\n            // Looks like silentRender flag should only be reset when a clear happened\n            _deferredSilentRender = _immediateSilentRender = false;\n          }\n        } else {\n          // Must be a silent render - really, it's the same as a full render, but has a time limit per tick\n          _rcs.renderType = _rcs.RENDERMODE_SILENT;\n          frameBudget = _this.targetFrameBudget;\n          // we must clear, just as on a full render\n          _needsClear = true;\n          movedStatus = ResetFlags.RESET_REDRAW;\n          _deferredSilentRender = _immediateSilentRender = false;\n        }\n\n        // Option to skip automatic camera update - can be used when a specific camera near-far values are desired.\n        if (!_this.skipCameraUpdate) {\n          _this.updateCameraMatrices();\n        }\n\n        //if (ENABLE_DEBUG) { console.log(\" COMMAND CREATION: clearing: \" + _needsClear + \", rendering: \" + _needsRender); }\n\n        _rcs.setFrame(frameBudget);\n\n        // set to true when the render is truly done\n        _rcs.finishedFullRender = false;\n\n        _rcs.beginCommandSet();\n\n        // Set up commands for the entire sequence of possible render states. The most important thing here is to not overthink it.\n        // Each command gets executed. If it runs out of time, it returns \"true\". On the next tick command processing will continue\n        // at the same command (it's up to the command itself to keep track of where it left off). The tricky part is if a command\n        // needs to be run after renders every tick, \"CMD_DO_AFTER\", e.g. draw overlays and present when progressive rendering is on.\n\n        // Otherwise, just lay out the worst-case scenario for drawing the scene, \"if this didn't finish here, early on, do the rest\n        // later\". This happens with ground reflections, for example. There's some logic in the commands themselves that check if it's\n        // the first tick, for example, or if it's a progressive tick or a full-render tick.\n\n        // Ground shadow is computed separately, if needed, so check if the feature is in use at all.\n        // It is if the flag is on, it's not 2D, and we're not loading (if we are loading, the ground shadow will change\n        // anyway, so we don't render it then).\n        var useGroundShadow = _groundShadow.enabled && !_this.is2d && !_isLoading;\n        var useGroundReflection = !!_groundReflection && !_this.is2d && !_isLoading;\n\n        // build a list to do the main full pass\n        var cameraChanged = moved || canvasSizeUpdated;\n\n        // Smooth Navigation: if it's on, and \"moved\" is happening, and AO is on, AO is temporarily turned off in the renderer.\n        // We also note this status, and use a special CMD_DO_AFTER command to turn AO back on at the end of every command execution\n        // (i.e., tick that this command set runs). This avoids headaches with some other system turning off AO in between ticks -\n        // it can now safely do so, without the tick() turning it back on when execution is completed or aborted.\n        var suppressAO = moved && _this.skipAOWhenMoving && _renderer.getAOEnabled();\n\n        // -----------------------------------------------------------------------------\n        // Start creation of a set of commands to execute over this and following ticks.\n\n        // Highlighting from the model browser needed?\n        _rcs.addCommand(cmdBeginScene);\n        _rcs.setParam(\"BeginScene.signalCameraChanged\", cameraChanged);\n        _rcs.setParam(\"BeginScene.clear\", _needsClear);\n\n        // for Smooth Navigation - turned on later by cmdRestoreAO as an CMD_ALWAYS_DO.\n        // We let the clear above clear the SAO buffer, since if we're using smooth navigation\n        // we know the SAO there will be invalid. This avoids the case where we're in a long\n        // smooth-navigation render which gets interrupted by a \"needs present\" render (a rollover\n        // highlight) which stops the full render we signalled for from completing.\n        if (suppressAO) {\n          _rcs.addCommand(cmdSuppressAO, _rcs.CMD_ALWAYS_DO);\n        }\n\n        // is there any geometry to render?\n        if (_modelQueue) {\n\n          // is shadow map needed? Generate only if not progressive.\n          if (_shadowMaps && _shadowMaps.state !== shadow.SHADOWMAP_VALID) {\n            _rcs.addCommand(cmdUpdateShadowMap);\n          }\n\n          // is ground shadow computed at this point? If not, and this is a full\n          // render, or this is a progressive render and it looks likely to finish,\n          // draw it.\n          if (useGroundShadow) {\n            _rcs.addCommand(cmdGenerateGroundShadow);\n            _rcs.setParam(\"GenerateGroundShadow.afterBeauty\", false);\n            _rcs.setParam(\"GenerateGroundShadow.signalRedraw\", false);\n          }\n\n          // if doing ground reflection, generate it now\n          if (useGroundReflection) {\n            // tell reflection system it needs to start from scratch once the commands start\n            _groundReflection.setDirty();\n\n            _rcs.addCommand(cmdGenerateGroundReflection);\n            _rcs.setParam(\"GenerateGroundReflection.afterBeauty\", false);\n          }\n          // Blit ground shadow first, if in use and ground reflection not in use.\n          // If ground reflection is in use, the shadow is composited with its target instead.\n          // If we are truly not clearing, then don't blit ground shadow, as it was already\n          // displayed in the previous frame (possibly incorrect for this frame, but the user\n          // asked to have no clear, so...). See LMV-2571\n          else if (useGroundShadow && _needsClear) {\n              _rcs.addCommand(cmdBlitGroundShadow);\n            }\n\n\n          if (_modelQueue.hasHighlighted()) {\n            // set phase and reset\n            _rcs.addCommand(cmdBeginPhase);\n            _rcs.setParam(\"BeginPhase.phase\", RenderFlags.RENDER_HIGHLIGHTED);\n            _rcs.setParam(\"BeginPhase.moved\", movedStatus);\n            // need to gather frags for the iterator, etc. only once\n            movedStatus = false;\n\n            // draw the highlighting\n            _rcs.addCommand(cmdMainRender);\n\n          }\n\n          // beauty pass\n          _rcs.addCommand(cmdBeginPhase);\n          _rcs.setParam(\"BeginPhase.phase\", RenderFlags.RENDER_NORMAL);\n          _rcs.setParam(\"BeginPhase.moved\", movedStatus);\n          // need to gather frags for the iterator, etc. only once\n          movedStatus = false;\n          _rcs.addCommand(cmdMainRender);\n\n          // ghosting is done after the ground reflection is generated and merged, as it\n          // draws transparent atop all.\n          if (!_modelQueue.areAllVisible() && _this.showGhosting) {\n\n            // if we are progressive rendering, and are generating ground reflections, we do ghosting\n            // after the ground reflection is done. Else, do it now, as part of the full render, since\n            // we know everything's done.\n            // TODO I can imagine changing this logic - seems like we should have just one \"ghosting\n            // after everything\" bit of code insertion. The reason there is a split is that for full\n            // rendering we know the ground reflection is done at this point and can simply render atop,\n            // directly. For progressive rendering we need to wait for the reflection to finish, blend it\n            // in under, then ghost.\n            if (!useGroundReflection || _rcs.renderType !== _rcs.RENDERMODE_PROGRESSIVE) {\n              // show ghosting - highly transparent, so must be rendered last, atop everything else\n\n              //[TS] Ignore the below TODO -- I enabled rendering of sceneAfter and we will deal with the repercussions if they happen.\n              // TODO note that we don't do cmdSceneAfterRender here, though it might be nice to\n              // show sectioning. I don't really understand, but if we do add it here, the ghosted objects\n              // are drawn normally. I guess these objects need to be drawn again for sectioning?\n              _rcs.addCommand(cmdBeginPhase);\n              _rcs.setParam(\"BeginPhase.phase\", RenderFlags.RENDER_HIDDEN);\n              _rcs.setParam(\"BeginPhase.moved\", movedStatus);\n              _rcs.addCommand(cmdMainRender);\n            }\n            // note that all (possibly basic, for progressive) rendering is truly done.\n            _rcs.addCommand(cmdSceneAfterRender);\n          } else {\n            // Render sectioning, if any, and any additional buffers needed, such as ID.\n            // TODO for progressive rendering, it seems like we should do this *after* any Present(), if\n            // the buffers are not needed immediately. This command also notes rendering is done.\n            _rcs.addCommand(cmdSceneAfterRender);\n          }\n\n          if (_rcs.signalProgressByRendering) {\n            _rcs.addCommand(cmdSignalProcessingDone);\n          }\n        }\n\n        // Overlay is always rendered. In this way if we *do* get an overlay dirty while progressive rendering,\n        // the overlay will get updated.\n        // This must be done after the passes above, because our global rule is \"draw if z-depth matches\"\n        // and the z-depths must be established before the highlighted objects get drawn.\n        // render them. Always do this for progressive rendering, even if we stop early, since these are important.\n        _rcs.addCommand(cmdRenderOverlays, _rcs.renderType === _rcs.RENDERMODE_PROGRESSIVE ? _rcs.CMD_DO_AFTER : _rcs.CMD_NORMAL_SEQUENCE);\n\n\n        // We always need a present, since we know we're doing something. Also antialiasing and whatever blending is needed.\n        // Always do this for progressive rendering.\n        _rcs.addCommand(cmdPostAndPresent, _rcs.renderType === _rcs.RENDERMODE_PROGRESSIVE ? _rcs.CMD_DO_AFTER : _rcs.CMD_NORMAL_SEQUENCE);\n        _rcs.setParam(\"PostAndPresent.performAO\", _renderer.getAOEnabled() && !suppressAO);\n\n        // If this is a progressive render, make the last thing to happen the ground shadow, which if not done by now will trigger\n        // a rerender once it is fully created.\n        if (_rcs.renderType === _rcs.RENDERMODE_PROGRESSIVE && _modelQueue) {\n\n          if (_shadowMaps && _shadowMaps.state !== shadow.SHADOWMAP_VALID) {\n            // start shadow map generation from beginning\n            _rcs.addCommand(cmdResetShadowMap);\n            _rcs.addCommand(cmdUpdateShadowMap);\n          }\n\n          // Ground shadows are an entirely separate render, happening concurrently with the main renderer, and\n          // done after the progressive render is performed, if not completed by then. The full render does it\n          // as part of its rerender.\n\n          // If we are done with progressive and the ground shadow is not done, do them now.\n          if (useGroundShadow) {\n            _rcs.addCommand(cmdGenerateGroundShadow);\n            _rcs.setParam(\"GenerateGroundShadow.afterBeauty\", true);\n            // don't signal a redraw if the ground reflection is about to be finished and merged, too.\n            _rcs.setParam(\"GenerateGroundShadow.signalRedraw\", !useGroundReflection);\n            // TODO really need to fix progress meter, but at least we should show 100% done\n            if (_rcs.signalProgressByRendering) {\n              _rcs.addCommand(cmdSignalProcessingDone);\n            }\n          }\n\n          // if the ground shadows and reflection are not done, do them now.\n          if (useGroundReflection) {\n            _rcs.groundShadowInPost = false;\n\n            // Note that ground shadow is guaranteed to be done at this point, so will be merged in correctly.\n            _rcs.addCommand(cmdGenerateGroundReflection);\n            _rcs.setParam(\"GenerateGroundReflection.afterBeauty\", true);\n\n            // ghosting is done after the ground reflection is generated and merged, as it\n            // draws transparent atop all. Note that sectioning is already done.\n            if (!_modelQueue.areAllVisible() && _this.showGhosting) {\n              // show ghosting - highly transparent, so must be rendered last, atop everything else\n              // TODO note that we don't do cmdSceneAfterRender here, though it might be nice to\n              // show sectioning. I don't really understand, but if we do add it here, the ghosted objects\n              // are drawn normally. I guess these objects need to be drawn again for sectioning?\n              _rcs.addCommand(cmdBeginPhase);\n              _rcs.setParam(\"BeginPhase.phase\", RenderFlags.RENDER_HIDDEN);\n              _rcs.setParam(\"BeginPhase.moved\", movedStatus);\n              _rcs.addCommand(cmdMainRender);\n            }\n\n            // if it's done, perform a present\n            _rcs.addCommand(cmdFinishAllRendering);\n            _rcs.addCommand(cmdPostAndPresent);\n            _rcs.setParam(\"PostAndPresent.performAO\", _renderer.getAOEnabled() && !suppressAO);\n            if (_rcs.signalProgressByRendering) {\n              _rcs.addCommand(cmdSignalProcessingDone);\n            }\n          }\n        }\n\n        // Smooth Navigation - if on, then we need to always turn the renderer back to AO at the end of any tick;\n        // it will get turned back off the next tick by the renderer.\n        if (suppressAO) {\n          _rcs.addCommand(cmdRestoreAO, _rcs.CMD_ALWAYS_DO);\n          // If we get to this command, we've done all we can during smooth navigation and should now signal for a full redraw\n          // without smooth navigation. This works because \"moved\" should be false on the next tick (unless of course the\n          // user moved the view) and so a full or progressive render will occurs with smooth navigation off.\n          _rcs.addCommand(cmdSignalRedraw);\n        }\n\n        _rcs.addCommand(cmdFinishedFullRender);\n\n        _rcs.endCommandSet();\n\n        // if we reenter, by turning these off, we then will not rebuild the command list\n        _needsClear = false;\n        _needsRender = false;\n        // Avoid having updateOverlays() called every tick during a progressive rendering by turning off the overlay dirty flag. \n        // If we get a later overlayDirty, this will trigger updateOverlays() at the start of tick(), and will als cause the\n        // cmdRenderOverlays to trigger during a progressive render.\n        _overlayDirty = false;\n\n      }\n      ////////////////////////////////////////////////////////////////////////////\n\n      // only case left is that overlay is dirty\n      else {\n\n          // Possibly draw the overlay, only.\n          // Check if we've finished a render. If we are, we set up a short render to update the overlay.\n          // We ignore overlay dirty if we're in the middle of a (more than one tick) render, since the render itself will update the overlay.\n          if (_rcs.finishedFullRender) {\n\n            _rcs.beginCommandSet();\n\n            if (ENABLE_DEBUG_RCS) {console.log(\"=====\\nOVERLAY DIRTY\");}\n\n            if (rollover) {\n              // Do just the blend pass, having already adjusted the uniform for fading in.\n              _rcs.addCommand(cmdForcePresent);\n\n            } else {\n              // full overlay render and display\n\n              // just the overlay needs to be re-rendered\n              _rcs.addCommand(cmdRenderOverlays, true);\n\n            }\n\n            // we always need a present, since we know we're doing something.\n            _rcs.addCommand(cmdPostAndPresent, true);\n            // don't need to think about AO, since we are just fading in.\n            _rcs.setParam(\"PostAndPresent.performAO\", _renderer.getAOEnabled());\n\n            _rcs.endCommandSet();\n\n            // Avoid having updateOverlays() called every tick during a progressive rendering by turning off the overlay dirty flag. \n            // If we get a later overlayDirty, this will trigger updateOverlays() at the start of tick(), and will als cause the\n            // cmdRenderOverlays to trigger during a progressive render.\n            // Note that if we get an overlayDirty and rendering is occurring, _overlayDirty won't get cleared, which is good:\n            // we want the command system to detect this and turn on overlay rendering at that point.\n            _overlayDirty = false;\n          }\n        }\n    }\n\n    ///////////////////////////////////////////////\n    // Run the command list, if any. Note whether there's any work to do, so we can see if this state has changed and send an event.\n    _workThisTick = _rcs.cmdListActive;\n\n    // Optional callback that's being called just before executing the render command list.\n    // At this step, we already know if there is anything to render at all.\n    if (_this.onBeforeRender) {\n      _this.onBeforeRender(_workThisTick);\n    }\n\n    _rcs.executeCommandList();\n\n    ///////////////////////////////////////////////\n    // Keep it simple: this tick either did rendering, or it did not. If this differs from last frame's state, signal.\n    if (_workThisTick !== _workPreviousTick) {\n      _this.api.dispatchEvent({ type: et.FINAL_FRAME_RENDERED_CHANGED_EVENT, value: { finalFrame: !_workThisTick } });\n      // we're at the end of things, so the current state now becomes the \"previous tick\" state for testing next time.\n      _workPreviousTick = _workThisTick;\n    }\n\n    // used to determine FPS\n    _lastHighResTimeStamp = _rcs.highResTimeStamp;\n  };\n\n  // webVR has a requestAnimationFrame handler specific to HMD displays \n  this.setLmvDisplay = function (display) {\n    _lmvDisplay = display;\n  };\n\n  this.run = function () {\n    //Begin the render loop (but delay first repaint until the following frame, so that\n    //data load gets kicked off as soon as possible\n    _reqid = 0;\n    setTimeout(function () {\n      (function animloop(highResTimeStamp) {\n        _reqid = _lmvDisplay.requestAnimationFrame(animloop);\n        _this.tick(highResTimeStamp);\n      })();\n    }, 1);\n  };\n\n  this.stop = function () {\n    var _window = _this.getWindow();\n    _window.cancelAnimationFrame(_reqid);\n  };\n\n  this.toggleProgressive = function (value) {\n    this.progressiveRender = value;\n    _needsClear = true;\n  };\n\n  // Apply current clear colors to renderer while considering swapBlackAndWhite flag when in 2D\n  this.updateClearColors = function () {\n    var clearColor = this.clearColorTop;\n\n    // apply black/white swap to clear color if wanted\n    if (this.is2d && this.swapBlackAndWhite) {\n      var isWhite = clearColor.x === 1 && clearColor.y === 1 && clearColor.z === 1;\n      var isBlack = clearColor.x === 0 && clearColor.y === 0 && clearColor.z === 0;\n      if (isWhite) {\n        clearColor = new THREE.Color(0, 0, 0);\n      } else if (isBlack) {\n        clearColor = new THREE.Color(1, 1, 1);\n      }\n    }\n\n    _renderer.setClearColors(clearColor, this.clearColorBottom);\n  };\n\n  this.toggleSwapBlackAndWhite = function (value) {\n    this.swapBlackAndWhite = value;\n    this.updateClearColors();\n    _needsClear = true;\n  };\n\n  this.toggleGrayscale = function (value) {\n    _materials.setGrayscale(value);\n    _needsClear = true;\n  };\n\n  this.toggleGhosting = function (value) {\n    this.showGhosting = value;\n    _needsClear = true;\n  };\n\n  this.toggleOverlaysWhileMoving = function (value) {\n    this.showOverlaysWhileMoving = value;\n  };\n\n  this.togglePostProcess = function (useSAO, useFXAA) {\n    _renderer.initPostPipeline(useSAO, useFXAA);\n    this.fireRenderOptionChanged();\n    _needsClear = true;\n  };\n\n  this.toggleCmdMapping = function (value, controller) {\n    controller.keyMapCmd = value;\n  };\n\n  this.toggleGroundShadow = function (value) {\n    if (_groundShadow.enabled === value)\n    return;\n\n    _groundShadow.enabled = value;\n    _groundShadow.clear();\n    if (value) {\n      _groundShadow.setDirty();\n    }\n    // if we're turning on the ground shadow, we need to set up the ground plane\n    updateGroundTransform();\n    this.fireRenderOptionChanged();\n    this.invalidate(true, false, false);\n  };\n\n\n  /**\n      * Check if the ground shadows are enabled\n      * @private\n      */\n  this.isGroundShadowEnabled = function () {\n    return _groundShadow && _groundShadow.enabled;\n  };\n\n  this.setGroundShadowColor = function (color) {\n    if (!_groundShadow.enabled) return;\n\n    _groundShadow.setColor(color);\n    this.invalidate(true, false, false);\n  };\n\n  this.setGroundShadowAlpha = function (alpha) {\n    if (!_groundShadow.enabled) return;\n\n    _groundShadow.setAlpha(alpha);\n    this.invalidate(true, false, false);\n  };\n\n  this.toggleGroundReflection = function (enable) {\n    if (enable && !!_groundReflection ||\n    !enable && !_groundReflection)\n    return;\n\n    if (enable) {\n      _groundReflection = new GroundReflection(_webglrender, this.canvas.clientWidth, this.canvas.clientHeight, { clearPass: _renderer.getClearPass() });\n      _groundReflection.setClearColors(this.clearColorTop, this.clearColorBottom, isMobileDevice());\n      _groundReflection.toggleEnvMapBackground(_envMapBackground);\n      _groundReflection.setEnvRotation(_renderer.getEnvRotation());\n      // if we're turning on the ground reflection, we need to set up the ground plane\n      updateGroundTransform();\n    } else\n    {\n      _groundReflection.cleanup();\n      _groundReflection = undefined;\n    }\n\n    this.fireRenderOptionChanged();\n    this.invalidate(true, false, false);\n  };\n\n  this.setGroundReflectionColor = function (color) {\n    if (!_groundReflection) return;\n\n    _groundReflection.setColor(color);\n    this.invalidate(true, false, false);\n  };\n\n  this.setGroundReflectionAlpha = function (alpha) {\n    if (!_groundReflection) return;\n\n    _groundReflection.setAlpha(alpha);\n    this.invalidate(true, false, false);\n  };\n\n  this.toggleEnvMapBackground = function (value) {\n    _envMapBackground = value;\n    _renderer.toggleEnvMapBackground(value);\n\n    if (_groundReflection) {\n      _groundReflection.toggleEnvMapBackground(value);\n    }\n    this.invalidate(true, true, false);\n  };\n\n  this.isEnvMapBackground = function () {\n    return _envMapBackground;\n  };\n\n  this.setOptimizeNavigation = function (value) {\n    this.skipAOWhenMoving = value;\n  };\n\n  // If we have selection meshes, this function makes sure that they use exactly the same\n  // geometry as we used in the main scene rendering. This is needed to avoid z-buffer artifacts\n  // when using consolidation.\n  function updateSelectionProxies() {\n    for (var id in _this.selectionMeshes) {\n      var proxy = _this.selectionMeshes[id];\n\n      // Updating proxies is only relevant when using consolidtion. Otherwise, we always use the original\n      // fragment geometry and can keep static proxy geometry.\n      if (proxy.model && proxy.model.isConsolidated()) {\n        proxy.model.updateRenderProxy(proxy, proxy.fragId);\n      }\n    }\n  }\n\n  this.renderOverlays = function () {\n\n    updateSelectionProxies();\n\n    //The overlays (selection, pivot, etc) get lighted using\n    //the default lights, even if IBL is on\n    var lightsOn = this.lightsOn;\n    if (!lightsOn)\n    this.toggleLights(true, true);\n\n    var oldIntensity;\n    if (this.dir_light1) {\n      oldIntensity = this.dir_light1.intensity;\n      this.dir_light1.intensity = 1;\n    }\n\n    _renderer.renderOverlays(this.overlayScenes, this.lightsOn ? this.lights : this.no_lights);\n\n    if (!lightsOn)\n    this.toggleLights(false, true);\n\n    if (this.dir_light1)\n    this.dir_light1.intensity = oldIntensity;\n  };\n\n  this.setLayerVisible = function (layerIndexes, visible) {\n    this.layers.setLayerVisible(layerIndexes, visible);\n  };\n\n  this.isLayerVisible = function (layerIndex) {\n    return this.layers.isLayerVisible(layerIndex);\n  };\n\n  this.getVisibleLayerIndices = function () {\n    return this.layers.getVisibleLayerIndices();\n  };\n\n  this.setNearRadius = function (radius, redraw) {\n    if (this.nearRadius !== radius) {\n      this.nearRadius = radius;\n      if (redraw) {\n        this.invalidate(true);\n      }\n    }\n  };\n\n  this.getNearRadius = function () {\n    return this.nearRadius;\n  };\n\n  // Find model's bounds, including ground plane, if needed.\n  // Fit near and far planes to the model.\n  this.updateNearFarValues = function () {\n\n    var tmpCameraMatrix;\n    var tmpViewMatrix;\n    var tmpBox;\n\n    function init_three() {\n      tmpCameraMatrix = new THREE.Matrix4();\n      tmpViewMatrix = new THREE.Matrix4();\n      tmpBox = new THREE.Box3();\n    }\n\n    return function (camera, worldBox) {\n\n      if (!tmpBox)\n      init_three();\n\n      //NOTE: This is not computing the same matrix as what we use for rendering,\n      //in cases where we are in ORTHO mode and the camera is inside the model,\n      //which would result in negative near plane. For the purposes of computing\n      //the near/far planes, we have to skip the logic that adjusts the view matrix\n      //based on the near/far planes. See UnifiedCamera.updateMatrix for the related\n      //adjustment to the view matrix.\n      tmpCameraMatrix.compose(camera.position, camera.quaternion, camera.scale);\n      tmpViewMatrix.getInverse(tmpCameraMatrix);\n\n      tmpBox.copy(worldBox);\n\n      //If reflection is on, then we need to double the worldBox size in the Y\n      //direction, the reflection direction, otherwise the reflected view can be\n      //clipped.\n      if (_groundReflection) {\n        // Increase bounding box to include ground reflection geometry. The idea\n        // here is to extend the bounding box in the direction of reflection, based\n        // on the \"up\" vector.\n        var tmpVecReflect = new THREE.Vector3();\n        tmpVecReflect.multiplyVectors(tmpBox.max, camera.worldup);\n        var tmpVecMin = new THREE.Vector3();\n        tmpVecMin.multiplyVectors(tmpBox.min, camera.worldup);\n        tmpVecReflect.sub(tmpVecMin);\n        // tmpVecReflect holds how much to increase the bounding box.\n        // Negative values means the \"up\" vector is upside down along that axis,\n        // so we increase the maximum bounds of the bounding box in this case.\n        if (tmpVecReflect.x >= 0.0) {\n          tmpBox.min.x -= tmpVecReflect.x;\n        } else {\n          tmpBox.max.x -= tmpVecReflect.x;\n        }\n        if (tmpVecReflect.y >= 0.0) {\n          tmpBox.min.y -= tmpVecReflect.y;\n        } else {\n          tmpBox.max.y -= tmpVecReflect.y;\n        }\n        if (tmpVecReflect.z >= 0.0) {\n          tmpBox.min.z -= tmpVecReflect.z;\n        } else {\n          tmpBox.max.z -= tmpVecReflect.z;\n        }\n      }\n\n      // Expand the bbox based on ground shadow. Note that the horizontal extent of the ground shadow\n      // may be significantly larger for flat shadow light directions.\n      if (_shadowMaps && _shadowMaps.groundShapeBox) {\n        tmpBox.union(_shadowMaps.groundShapeBox);\n      }\n\n      //Transform the world bounds to camera space\n      //to estimate the near/far planes we need for this frame\n      tmpBox.applyMatrix4(tmpViewMatrix);\n\n      //Expand the range by a small amount to avoid clipping when\n      //the object is perfectly aligned with the axes and has faces at its boundaries.\n      var sz = 1e-5 * (tmpBox.max.z - tmpBox.min.z);\n\n      //TODO: expand for ground shadow. This just matches what the\n      //ground shadow needs, but we need a better way to take into account\n      //the ground shadow scene's bounds\n      var expand = (tmpBox.max.y - tmpBox.min.y) * 0.5;\n\n      var dMin = -(tmpBox.max.z + sz) - expand;\n      var dMax = -(tmpBox.min.z - sz) + expand;\n\n      //Camera is inside the model?\n      if (camera.isPerspective) {\n        // If dMax / dMin is too large then we get z buffer fighting, which we would\n        // like to avoid. In this case there are two alterniatives that we can do -\n        // we can move the near plane away from the camera, or we can move the far\n        // place toward the camera. If this.nearRadius is > 0, then we want to move\n        // the far plane toward the camera.\n        if (this.nearRadius > 0) {\n          // dMin might be OK, or might be negative or close to 0. If it is so small\n          // that depth precision will be bad, then we need to move it away from 0\n          // but no further than this.nearRadius.\n          dMin = Math.max(dMin, Math.min(this.nearRadius, Math.abs(dMax - dMin) * 1e-4));\n\n          // If the max is still too far away, then move it closer\n          dMax = Math.min(dMax, dMin * 1e4);\n        } else {\n          // dMin might be OK, or might be negative. If it's negative,\n          // give it a value of 1/10,000 of the entire scene's size relative to this view direction,\n          // or 1, whichever is *smaller*. It's just a heuristic.\n          dMin = Math.max(dMin, Math.min(1, Math.abs(dMax - dMin) * 1e-4));\n\n          if (dMax < 0) {\n            // near and far planes should always be positive numbers for perspective\n            dMax = 1e-4;\n          }\n          // One more attempt to improve the near plane: make it 1/100,000 of the distance of the\n          // far plane, if that's higher.\n          // See https://wiki.autodesk.com/display/LMVCORE/Z-Buffer+Fighting for reasoning.\n          // 1e-4 is generally good below, but inside Silver Cross we get a lot of near clipping. So, 1e-5.\n          dMin = Math.max(dMin, dMax * 1e-5);\n        }\n      } else {\n        //TODO:\n        //Do nothing in case of ortho. While this \"fixes\" near plane clipping too aggressively,\n        //it effectively disallows moving through walls to go inside the object.\n        //So we may need some heuristic based on how big we want the object to be\n        //on screen before we let it clip out.\n        //dMin = Math.max(dMin, 0);\n      }\n\n      //The whole thing is behind us -- nothing will display anyway?\n      dMax = Math.max(dMax, dMin);\n\n      camera.near = dMin;\n      camera.far = dMax;\n      camera.updateProjectionMatrix();\n      camera.updateMatrixWorld();\n      camera.matrixWorldInverse.getInverse(camera.matrixWorld);\n    };\n  }();\n\n  this.getPixelsPerUnit = function (camera, worldBox) {var model = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : this.model;\n    var deviceHeight = _renderer.settings.deviceHeight; // = canvas height * pixelRatio\n    var is2d = model.is2d();\n\n    //If there is a cutting plane, get a point on that plane\n    //for by the pixel scale computation. (only used for 3D)\n    var cutPlanes = _materials.getCutPlanesRaw();\n    var cutPlane = cutPlanes[0];\n\n    var modelBox = model.getBoundingBox();\n\n    return SceneMath.getPixelsPerUnit(camera, is2d, worldBox, deviceHeight, cutPlane, modelBox);\n  };\n\n  this.updateCameraMatrices = function () {var _this3 = this;\n    var camera = this.camera;\n\n    //TODO: Would be nice if this got called by the world up tool instead,\n    //so that we don't have to update it every frame.\n    if (camera.worldup)\n    this.setWorldUp(camera.worldup);\n\n\n    // Optional: Set modelFilter that excludes models if they are too far away from the camera\n    var bboxFilter = this.maxModelDistance && function (bbox) {\n      // Check box distance\n      var dist2 = SceneMath.pointToBoxDistance2(_this.camera.position, bbox);\n      return dist2 < _this.maxModelDistance * _this.maxModelDistance;\n    };\n\n    // Update near & far values according to the unified bounds of all the models in modelQueue.\n    // There is a special case for underlay raster, where `this.model` is not set, but there is a temp model inside modelQueue - this\n    // is why we update these values even if `this.model` is not set.\n    var worldBox = this.getVisibleBounds(true, _overlayDirty, bboxFilter);\n    this.updateNearFarValues(camera, worldBox);\n\n    if (this.model) {\n      // Update the line width scale with the new pixels per unit scale.\n      var pixelsPerUnit = this.getPixelsPerUnit(camera, worldBox);\n      var width = _renderer.settings.deviceWidth;\n      var height = _renderer.settings.deviceHeight;\n      if (this.is2d)\n      {\n        //If we want to take into account devicePixelRatio for line weights (so that lines are not too thin)\n        //we can do this here, but it's less esthetically pleasing:\n        //pixelsPerUnit /= _webglrenderer.getPixelRatio();\n\n        _materials.updatePixelScale(pixelsPerUnit, width, height);\n\n        // AutoCAD drawings are commonly displayed with white lines on a black background. Setting reverse swaps (just)\n        // these two colors.\n        _materials.updateSwapBlackAndWhite(this.swapBlackAndWhite);\n      } else {// is3d\n\n        _materials.updatePixelScale(pixelsPerUnit, width, height);\n      }\n\n      // Set pixelsPerUnit according to each sheet in 3D space. In general, it is set according to the modelQueue's bounds\n      // which is not related to how we want to present the sheet (i.e. the line thickness will vary when selecting a\n      // floor as a result, because of the changing viewing volume)\n      // Note: Previously this was done only when in 3D mode, but it's also needed in 2D in case a transform with\n      // scaling is set.\n      var models = this.get2DModels();\n      models.forEach(function (model) {\n        var transform = model.getModelToViewerTransform();\n        var scaling = transform ? transform.getMaxScaleOnAxis() : 1;\n        if (!_this3.is2d || scaling !== 1) {\n          var bounds = model.getVisibleBounds();\n          var _pixelsPerUnit = SceneMath.getPixelsPerUnit(camera, false, bounds, height);\n\n          _materials.updatePixelScaleForModel(model, _pixelsPerUnit, width, height, scaling);\n        }\n      });\n    }\n  };\n\n  this.initLights = function ()\n  {\n    if (_lightsInitialized) {\n      return;\n    }\n\n    this.dir_light1 = new THREE.DirectionalLight(_defaultDirLightColor, _defaultLightIntensity);\n    this.dir_light1.position.copy(_lightDirDefault);\n\n    //Note this color will be overridden by various light presets\n    this.amb_light = new THREE.AmbientLight(_defaultAmbientColor);\n\n    // Set this list only once, so that we're not constantly creating and deleting arrays each frame.\n    // See https://www.scirra.com/blog/76/how-to-write-low-garbage-real-time-javascript for why.\n    // use this.no_lights empty array if no lights are needed.\n    this.lights = [this.dir_light1, this.amb_light];\n\n    //We do not add the lights to any scene, because we need to use them\n    //in multiple scenes during progressive render.\n    //this.scene.add(this.amb_light);\n\n    // Attach the light to the camera, so that the light direction is applied in view-space.\n    // Note:\n    //\n    //  1. For directional lights, the direction where the light comes from is determined by\n    //     lightPosition - targetPosition, both in in world-space.\n    //  2. The default target of dir lights is the world origin.\n    //  3. Transforming the light object only affects the light position, but has no effect on the target.\n    //\n    // The goal is to rotate the lightDir with the camera, but keep it independent\n    // of the camera position. Due to 3. above, we must also attach the light's target object to the camera.\n    // Otherwise, the camera position would incorrectly be added to the light direction.\n    this.camera.add(this.dir_light1);\n    this.camera.add(this.dir_light1.target);\n\n    _lightsInitialized = true;\n  };\n\n  var setLights = function setLights(amb_light, dir_light1, state, isForOverlay) {\n    //Update the light colors based on the current preset\n    var preset = LightPresets[_currentLightPreset];\n    var ac = preset && preset.ambientColor;\n    var dc = preset && preset.directLightColor;\n\n    ac = ac || _defaultAmbientColor.toArray();\n    dc = dc || _defaultDirLightColor.toArray();\n\n    if (state) {\n      if (isForOverlay && amb_light)\n      amb_light.color.setRGB(dc[0] * 0.5, dc[1] * 0.5, dc[2] * 0.5);else\n      if (amb_light) {\n        amb_light.color.setRGB(ac[0], ac[1], ac[2]);\n      }\n\n      if (dir_light1) {\n        dir_light1.color.setRGB(dc[0], dc[1], dc[2]);\n      }\n    } else\n\n    {\n      //Restores the ambient for the main scene after drawing overlays\n      if (amb_light && isForOverlay)\n      amb_light.color.setRGB(ac[0], ac[1], ac[2]);\n    }\n  };\n\n\n  this.toggleLights = function (state, isForOverlay) {\n\n    //This can happen during initial construction\n    if (!this.amb_light)\n    return;\n\n    // Don't create or remove arrays, as that's bad to do during rendering.\n    // Instead, later use lightsOn to decide which array to use.\n    this.lightsOn = state;\n\n    setLights(this.amb_light, this.dir_light1, state, isForOverlay);\n  };\n\n  //Forces the view controller to update when the camera\n  //changes programmatically (instead of via mouse events).\n  this.syncCamera = function (syncWorldUp)\n  {\n    this.camera.updateCameraMatrices();\n\n    if (syncWorldUp)\n    this.setWorldUp(this.api.navigation.getWorldUpVector());\n\n    _cameraUpdated = true;\n  };\n\n  /**\n      * Get the model's initial camera\n      * @param {Model} model\n      * @returns camera\n      */\n  this.getModelCamera = function (model) {\n    if (!model) return;\n    var camera;\n    var defaultCamera = model.getDefaultCamera();\n    if (defaultCamera) {\n      camera = defaultCamera;\n    } else {\n      //Model has no default view. Make one up based on the bounding box.\n      camera = UnifiedCamera.getViewParamsFromBox(\n      model.getBoundingBox(),\n      model.is2d(),\n      this.camera.aspect,\n      this.camera.up,\n      this.camera.fov);\n\n    }\n    return camera;\n  };\n\n\n  this.setViewFromFile = function (model, skipTransition) {\n\n    if (!model) {\n      return;\n    }\n\n    var camera = this.getModelCamera(model);\n\n    //[TS] WTF, this is a hack that should not be here, the viewer3dimpl is not supposed to know\n    //about tools at all!\n    // If the current orbiting mode is unconstrained (the 'freeorbit' tool),\n    // use exact camera settings, otherwise (the 'orbit' tool) snap the up vector to a world axis.\n    // However, if this is the initial load and the model has a free orbit navigation mode defined\n    // we will use the exact camera settings no matter if the free orbit tool is active or not.\n    // Note #1: that 'freeorbit' vs. 'orbit' tools are active even when the FusionOrbit extension is used.\n    // Note #2: isToolActivated is not available in node-lmv, so we stub it to always return false\n    var navModeHint = model.getMetadata('navigation hint', 'value', null);\n    var useExactCamera = this.controls.isToolActivated('freeorbit') ||\n    skipTransition && navModeHint === \"Freeorbit\";\n\n    this.setViewFromCamera(camera, skipTransition, useExactCamera);\n  };\n\n  //Camera is expected to have the properties of a THREE.Camera.\n  this.adjustOrthoCamera = function (camera) {\n    var bbox = this.getVisibleBounds();\n    UnifiedCamera.adjustOrthoCamera(camera, bbox);\n  };\n\n  /**\n      * Switches to a new view based on a given camera. If the current orbiting mode is constrained,\n      * the up vector may be adjusted.\n      *\n      * @param {THREE.Camera} camera Input camera.\n      * @param {boolean} skipTransition Switch to the view immediately instead of transitioning.\n      * @param {boolean} useExactCamera -- whether any up vector adjustment is to be done (to keep head up view)\n      */\n  this.setViewFromCamera = function (camera, skipTransition, useExactCamera)\n  {\n    this.adjustOrthoCamera(camera);\n\n    // Choose the first up-vector we get from the main model.\n    // We assume all models have identical up vectors - otherwise, the aggregated model would be weird anyway.\n    var upVectorArray = this.model ? this.model.getUpVector() : null;\n\n    var worldUp;\n    if (upVectorArray) {\n      worldUp = new THREE.Vector3().fromArray(upVectorArray);\n    } else {\n      worldUp = useExactCamera ? camera.up.clone() : Navigation.snapToAxis(camera.up.clone());\n    }\n\n    if (useExactCamera) {\n      if (this.api.prefs)\n      this.api.prefs.set('fusionOrbitConstrained', worldUp.equals(camera.up));\n    } else {\n      camera.up = worldUp;\n    }\n\n    var navapi = this.api.navigation;\n    if (navapi) {\n\n      var tc = this.camera;\n\n      if (!skipTransition) {\n        tc.isPerspective = camera.isPerspective;\n\n        if (!camera.isPerspective) {\n          tc.saveFov = camera.fov; // Stash original fov\n          camera.fov = UnifiedCamera.ORTHO_FOV;\n        }\n\n        if (useExactCamera) {\n          navapi.setRequestTransitionWithUp(true, camera.position, camera.target, camera.fov, camera.up, worldUp);\n        } else {\n\n          // Fix camera's target if it is not inside the scene's bounding box.\n          var bbox = this.getVisibleBounds();\n          if (!bbox.containsPoint(camera.target)) {\n            var distanceFromCenter = bbox.center().distanceTo(camera.position);\n            var direction = camera.target.clone().sub(camera.position).normalize().multiplyScalar(distanceFromCenter);\n            camera.target.copy(camera.position.clone().add(direction));\n          }\n\n          var up = navapi.computeOrthogonalUp(camera.position, camera.target);\n          navapi.setRequestTransitionWithUp(true, camera.position, camera.target, camera.fov, up, worldUp);\n        }\n      } else {\n        //This code path used during initial load -- it sets the view directly\n        //without doing a transition. Transitions require that the camera is set explicitly\n\n        tc.up.copy(camera.up);\n        tc.position.copy(camera.position);\n        tc.target.copy(camera.target);\n        if (camera.isPerspective) {\n          tc.fov = camera.fov;\n        } else\n        {\n          tc.saveFov = camera.fov; // Stash original fov\n          tc.fov = UnifiedCamera.ORTHO_FOV;\n        }\n        tc.isPerspective = camera.isPerspective;\n        tc.orthoScale = camera.orthoScale;\n        tc.dirty = true;\n\n        navapi.setWorldUpVector(useExactCamera ? worldUp : tc.up);\n        navapi.setView(tc.position, tc.target);\n        navapi.setPivotPoint(tc.target);\n\n        this.syncCamera(true);\n      }\n    }\n    _cameraUpdated = true;\n  };\n\n  /**\n      * Performs the inverse operation than Viewer3D.setViewFromArray() using\n      * the current camera values.\n      * \n      * @param {object} [globalOffset] - { x:Number, y:Number, z:Number } that gets substracted from position and target.\n      * \n      * @returns {Array} with 13 elements\n      */\n  this.getViewArrayFromCamera = function (globalOffset) {\n\n    var off = globalOffset || { x: 0, y: 0, z: 0 };\n    var cam = this.camera;\n\n    var worldUp;\n    var upVectorArray = this.model.getUpVector();\n    if (upVectorArray) {\n      worldUp = new THREE.Vector3().fromArray(upVectorArray);\n    } else {\n      worldUp = Navigation.snapToAxis(cam.up.clone());\n    }\n\n    var target = this.api.navigation.getPivotPoint();\n\n    var ret = [\n    cam.position.x + off.x, cam.position.y + off.y, cam.position.z + off.z,\n    target.x + off.x, target.y + off.y, target.z + off.z,\n    worldUp.x, worldUp.y, worldUp.z,\n    cam.aspect,\n    THREE.Math.degToRad(cam.fov),\n    cam.orthoScale,\n    cam.isPerspective ? 0 : 1];\n\n\n    return ret;\n  };\n\n  this.setViewFromViewBox = function (model, viewbox, name, skipTransition)\n  {\n    if (!model.is2d()) {\n      return;\n    }\n\n\n    var camera = {};\n\n    var bbox = model.getBoundingBox();\n\n    var box = {\n      width: viewbox[2] - viewbox[0],\n      height: viewbox[3] - viewbox[1] };\n\n    box.aspect = box.width / box.height;\n    box.centerX = viewbox[0] + box.width / 2;\n    box.centerY = viewbox[1] + box.height / 2;\n\n    var screenAspect = this.camera.aspect;\n\n    //Fit the viewbox to the screen\n    if (screenAspect > box.aspect)\n    camera.orthoScale = box.height;else\n\n    camera.orthoScale = box.width / screenAspect;\n\n    camera.isPerspective = false;\n    camera.position = new THREE.Vector3(box.centerX, box.centerY, bbox.center().z + camera.orthoScale);\n    camera.target = new THREE.Vector3(box.centerX, box.centerY, bbox.center().z);\n    camera.target.y += 1e-6 * box.height;\n\n    camera.up = new THREE.Vector3(0, 0, 1);\n\n    this.setViewFromCamera(camera, skipTransition, false);\n  };\n\n  this.setWorldUp = function (upVector) {\n\n    if (_worldUp.equals(upVector))\n    return;\n\n    _worldUp.copy(upVector);\n\n    // get the (max) up axis and sign\n    var maxVal = Math.abs(upVector.x);\n    _worldUpName = \"x\";\n    if (Math.abs(upVector.y) > maxVal) {\n      _worldUpName = \"y\";\n      maxVal = Math.abs(upVector.y);\n    }\n    if (Math.abs(upVector.z) > maxVal) {\n      _worldUpName = \"z\";\n    }\n\n    var getRotation = function getRotation(vFrom, vTo) {\n      var rotAxis = new THREE.Vector3().crossVectors(vTo, vFrom).normalize(); // not sure why this is backwards\n      var rotAngle = Math.acos(vFrom.dot(vTo));\n      return new THREE.Matrix4().makeRotationAxis(rotAxis, rotAngle);\n    };\n\n    var identityUp = new THREE.Vector3(0, 1, 0);\n    _this.camera.worldUpTransform = getRotation(identityUp, upVector);\n\n    this.sceneUpdated(false);\n  };\n\n  this.setUp2DMode = function (model, isOverlay) {\n    var data = model.getData();\n\n    // Initialize layer texture if needed. Note that some files may not have layers at all, e.g., leaflets.\n    if (data.layerCount) {\n      _materials.initLayersTexture(data.layerCount, data.layersMap, model.id);\n    }\n\n    // The id material is not specific to a model, so don't make it a model material.\n    // If the id material is attached to a model, you can get into this situation:\n    // Load two models m1 first and then m2 into the same RenderContext and MaterialManager.\n    // At the end of this the RenderContext's id material is attached to m2. Then transfer\n    // m2 to a new RenderContext and MaterialManager. Because the id material is attached\n    // to m2, it is transfered to the new context, but it is still the id material in the\n    // first context, too. There isn't anything in the id material that is specific to a model,\n    // so keeping the id material from being attached to a model, fixes that issue.\n    var idMatName = _materials.create2DMaterial(null, {}, true, false, function () {_this.invalidate(false, true, false);});\n    var idMaterial = _materials.findMaterial(null, idMatName);\n\n    if (!isOverlay) {\n      // In case the previous model was 2d, first exit the previous 2d mode, and only then re-enter it again.\n      if (this.is2d) {\n        _renderer.exit2DMode();\n      }\n\n      // When loading single leaflet models, don't ask for ids.\n      _renderer.enter2DMode(idMaterial, this.matman().get2dSelectionColor());\n\n      // If we were in 3d mode before, save lightPreset first before replacing it by 2d preset\n      if (!this.is2d) {\n        this.saveLightPreset();\n      }\n\n      this.is2d = true;\n\n      this.setLightPreset(DefaultLightPreset2d);\n      this.setRenderingPrefsFor2D(true);\n\n      var svf = model.getData();\n      if (svf.hidePaper) {\n        var bg = svf.bgColor;\n        var r = bg >> 16 & 0xff;\n        var g = bg >> 8 & 0xff;\n        var b = bg & 0xff;\n        this.setClearColors(r, g, b, r, g, b);\n      }\n    }\n  };\n\n  this.addModel = function (model, preserveTools)\n  {\n    if (!model)\n    return;\n\n    //Is it the first model being loaded into the scene?\n    var isOverlay = !!this.model;\n    var is2d = model.is2d();\n\n    if (!this.model && !model.getData().underlayRaster) {\n      this.model = model;\n\n      _renderer.setUnitScale(model.getUnitScale());\n    }\n\n    // Initialize layers.\n    if (!this.layers) {\n      this.layers = new ModelLayers(this);\n    }\n\n    if (!model.getData().underlayRaster) {\n      this.layers.addModel(model, /*defer3d*/true);\n    }\n\n    //Create a render list for progressive rendering of the\n    //scene fragments\n    _modelQueue.addModel(model);\n    this.selector.addModel(model);\n    this.visibilityManager.addModel(model);\n\n    this._setModelPreferences(model);\n\n    // In case of a 2D drawing initialize the common line shader and the layers texture.\n    if (is2d) {\n      this.setUp2DMode(model, isOverlay);\n    } else if (this.is2d) {\n      // If a previous model was 2d and the newly inserted model is 3d, switch off 2d mode.\n      this.is2d = undefined;\n      _renderer.exit2DMode();\n    } else if (_3dLightPreset >= 0) {\n      // LMV-5655: Keep track of the last 3d light preset.\n      // There was an issue when switching from 3d -> 2d -> 2d -> 3d.\n      // For this case the _oldLightPreset would be overridden with environment 0.\n      _oldLightPreset = _3dLightPreset;\n    }\n\n    // Make sure that swapBlackAndWhite toggle is only considered as long as we are in 2d\n    this.updateClearColors();\n\n    this.setupLighting(model);\n    syncIdTargetCount();\n\n    this.fireRenderOptionChanged();\n    this.invalidate(true);\n\n    // Fire an event for the addition of a model into the _modelQueue\n    this.api.fireEvent({ type: et.MODEL_ADDED_EVENT, model: model, preserveTools: preserveTools, isOverlay: isOverlay });\n  };\n\n  this._setModelPreferences = function (model) {\n\n    // This is the place to load from preferences when a new model is added\n\n    // Apply current renderLines/renderPoints settings\n    model.hideLines(!this.api.prefs.lineRendering);\n    model.hidePoints(!this.api.prefs.pointRendering);\n\n    // selection mode\n    model.selector.setSelectionMode(this.api.prefs.get(Prefs3D.SELECTION_MODE));\n\n  };\n\n  this.setupLighting = function (model) {\n\n    model = model || this.model;\n\n    if (isNodeJS() || !model || model.is2d()) {\n      return;\n    }\n\n    // grab the environment preset data from the file.\n    //This will usually be set for Fusion files.\n    if (!this.setLightPresetFromFile(model)) {\n      //When switching from a 2D sheet back to a 3D view,\n      //we restore the environment map that was used for the\n      //last 3D view displayed. The operation is delayed until here\n      //so that switching between 2D sheets does not incur this unnecessary overhead.\n      if (_oldLightPreset >= 0) {\n        this.setLightPreset(_oldLightPreset, true, _oldCallback);\n        _oldLightPreset = -1;\n        _oldCallback = null;\n      } else {\n        this.setLightPreset(_currentLightPreset, false);\n      }\n    }\n\n    this.setAOHeuristics(model);\n  };\n\n  this.getSvfMaterialId = function (fragId) {\n    return this.model.getFragmentList().getSvfMaterialId(fragId);\n  };\n\n  this.getMaterials = function () {return _materials;};\n\n\n  //Creates a THREE.Mesh representation of a fragment. Currently this is only\n  //used as vehicle for activating a fragment instance for rendering once its geometry is received\n  //or changing the fragment data (matrix, material). So, it's mostly vestigial.\n  this.setupMesh = function (model, threegeom, materialId, matrix) {\n\n    var m = {\n      geometry: threegeom,\n      matrix: matrix,\n      isLine: threegeom.isLines,\n      isWideLine: threegeom.isWideLines,\n      isPoint: threegeom.isPoints,\n      is2d: threegeom.is2d };\n\n\n    if (materialId)\n    m.material = this.matman().setupMaterial(model, threegeom, materialId);\n\n    // Update creation time for loading animation.\n    if (model.is2d()) {\n      m.geometry.creationTime = _lastHighResTimeStamp;\n      this.lastTime2dGeometryCreated = _lastHighResTimeStamp;\n    }\n\n    return m;\n  };\n\n  function selection2dOverlayName(model) {\n    //We have to use the material hashing from MaterialManager so that\n    //the material gets cleaned up when the model is unloaded.\n    return _materials._getMaterialHash(model, \"selection2d\");\n  }\n\n  this.init2dSelection = function (model) {\n\n    var overlayName = selection2dOverlayName(model);\n    if (this.overlayScenes[overlayName]) {\n      // Selection already initialized for this model\n      return;\n    }\n\n    // create selection texture and material\n    // Note: We assume here that the selection material for this model does not exist yet. (otherwise, the params in create2DMaterial would be ignored)\n    var selectionTexture = _materials.initSelectionTexture(model.getData().maxObjectNumber, model.id);\n    var selMatName = _materials.create2DMaterial(model, {}, false, selectionTexture, function () {_this.invalidate(false, true, false);});\n    var selMat = _materials.findMaterial(model, selMatName);\n\n    this.createOverlayScene(overlayName, selMat);\n  };\n\n  // Gets called by the active Loader\n  this.onLoadComplete = function (model)\n  {\n    _isLoading = false;\n\n    this.signalProgress(100, ProgressState.LOADING);\n\n    if (this.modelVisible(model.id)) {\n      // Only if ground shadows or reflections are on do we need to emit a refresh.\n      if (_groundShadow && _groundShadow.enabled || _groundReflection) {\n        this.sceneUpdated(false, true);\n      }\n      this.invalidate(!!_groundReflection, true, false);\n    }\n\n    //In the case of 2d drawing, initialize the dbIds texture\n    //to be used for selection highlighting.\n    // Note that we cannot do this earlier: Creating the texture requires to know model.myData.maxObjectNumber - which\n    // is dynamically increased during loading and not known on model-add.\n    if (model.is2d()) {\n      this.init2dSelection(model);\n    }\n\n    var geomList = model.getGeometryList();\n    if (geomList) {\n      geomList.printStats();\n    }\n\n    if (!model.hasGeometry()) {\n      logger.warn(\"Loaded model has no geometry.\");\n    }\n    // do a silent render in case a transparent object got loaded and rendered ahead of an opaque one.\n    else if (_materials.hasTransparentMaterial()) {\n        this.requestSilentRender();\n      }\n\n    // set initial visibility of nodes\n    this.handleInitialVisibility(model);\n\n    // Fire the event so we know the geometry is done loading.\n    this.api.dispatchEvent({\n      type: et.GEOMETRY_LOADED_EVENT,\n      model: model });\n\n  };\n\n  this.onTextureLoadComplete = function (model) {\n    // Fire the event so we know the textures for a model are done loading.\n    this.api.dispatchEvent({\n      type: et.TEXTURES_LOADED_EVENT,\n      model: model });\n\n\n    // Once all the texture are loaded, we need to trigger an extra silent Render in Next Frame\n    // It will fix the missing texture and avoid loading-flashing if we clear the color target everytime\n    // LMV-4577 for more information\n    this.requestSilentRender();\n  };\n\n  this.signalProgress = function (percent, progressState, model)\n  {\n    if (_progressEvent.percent === percent &&\n    _progressEvent.state === progressState &&\n    model && _progressEvent.model && _progressEvent.model.id === model.id) {\n      return;\n    }\n\n    _progressEvent.percent = percent;\n    _progressEvent.state = progressState;\n\n    if (model) {\n      _progressEvent.model = model;\n    }\n\n    this.api.dispatchEvent(_progressEvent);\n  };\n\n  this.resize = function (w, h, immediateUpdate) {\n    _needsResize = true;\n    _newWidth = w;\n    _newHeight = h;\n\n    if (immediateUpdate) {\n      updateCanvasSize(true);\n    }\n  };\n\n  this.unloadModel = function (model, keepResources) {\n\n    // If model was visible, remove it.\n    // If it was hidden, it has already been removed from viewer and we just have to remove it from\n    // the hiddenModels list in RenderScene.\n    if (!this.removeModel(model) && !_modelQueue.removeHiddenModel(model)) {\n      // If neither of this works, this model is unknown.\n      return;\n    }\n\n    if (!keepResources) {\n      // Note that this just discards the GPU resources, not the model itself.\n      model.dtor(this.glrenderer());\n      _materials.cleanup(model);\n\n      if (model.loader) {\n        model.loader.dtor();\n        model.loader = null;\n      }\n    }\n\n    // remove selection overlay (F2D models)\n    if (model.is2d() && this.overlayScenes[model.id]) {\n      this.removeOverlayScene(selection2dOverlayName(model));\n    }\n\n    this.api.dispatchEvent({ type: et.MODEL_UNLOADED_EVENT, model: model });\n  };\n\n  this._reserveLoadingFile = function () {\n    if (!this.loaders) {\n      this.loaders = [];\n    }\n    // The reservation is an object with a dtor function, in case\n    // the load gets canceled before loader instance is created.\n    var reservation = { dtor: function dtor() {} };\n    this.loaders.push(reservation);\n    return reservation;\n  };\n\n  this._hasLoadingFile = function () {\n    return this.loaders && this.loaders.length > 0;\n  };\n\n  this._addLoadingFile = function (reservation, svfLoader) {\n    if (this.loaders) {\n      var index = this.loaders.indexOf(reservation);\n      if (index >= 0)\n      this.loaders[index] = svfLoader;\n    }\n  };\n\n  this._removeLoadingFile = function (svfLoader) {\n    if (this.loaders) {\n      var idx = this.loaders.indexOf(svfLoader);\n      if (idx >= 0) {\n        this.loaders.splice(idx, 1);\n      }\n    }\n  };\n\n\n  /** Removes a model from this viewer, but (unlike unload) keeps the RenderModel usable,\n      *  so that it can be added to this or other viewers later.\n      *   @param {RenderModel}\n      *   @returns {bool} True if the model was known and has been successfully removed.\n      */\n  this.removeModel = function (model) {\n\n    if (!_modelQueue.removeModel(model)) {\n      return false;\n    }\n\n    // TODO: Removing a single model should not destroy this whole thing.\n    if (this.keyFrameAnimator) {\n      this.keyFrameAnimator.destroy();\n      this.keyFrameAnimator = null;\n    }\n\n    this.selector.removeModel(model);\n    this.visibilityManager.removeModel(model);\n    this.layers.removeModel(model);\n\n    if (model === this.model) {\n      this.model = null;\n\n      if (!_modelQueue.isEmpty())\n      this.model = _modelQueue.getModels()[0];\n    }\n\n    syncIdTargetCount();\n    this.invalidate(true, true, true);\n\n    this.api.fireEvent({ type: et.MODEL_REMOVED_EVENT, model: model });\n\n    return true;\n  };\n\n  /**\n      * Stops loading for a model url for which the RenderModel is not in memory yet.\n      * TODO: This should be unified with unloadModel to a single API function, but we need a unique way first\n      *       to address the model in both cases.\n      *\n      *  @param {string} url - Must exactly match the url used for loading\n      */\n  this.cancelLoad = function (url) {\n\n    if (!this.loaders) {\n      return;\n    }\n\n    // Find loader that is loading this url\n    for (var i = 0; i < this.loaders.length; i++) {\n      // TODO: currentLoadPath is only defined for SVF/OTG models. It would be better to have a unified way\n      //       to cancel model loading.\n      var loader = this.loaders[i];\n      if (loader.currentLoadPath === url) {\n        // Loader found - stop it\n        loader.dtor();\n        this.loaders.splice(i, 1);\n        break;\n      }\n    }\n  };\n\n  function syncIdTargetCount() {\n    if (isMobileDevice())\n    return;\n\n    var sceneModelCount = _modelQueue.getModels().length;\n    var flags = _renderer.mrtFlags();\n\n    if (sceneModelCount > 1 && flags.mrtIdBuffer < 2) {\n      // To support more than 24 bits, the target count will have to be 2 from the get-go,\n      // even for single model usage.\n      var bChanged = _renderer.setIdTargetCount(2);\n      bChanged && _materials.toggleMRTSetting(_renderer.mrtFlags());\n    }\n  }\n\n  /**\n     * Removes loaded models and models that are getting loaded.\n     * Method can be invoked while still loading the initial model. \n     */\n  this.unloadCurrentModel = function () {\n\n    if (this.model) {\n      //Before loading a new model, restore states back to what they\n      //need to be when loading a new model. This means restoring transient\n      //changes to the render state made when entering 2d mode,\n      //like light preset, antialias and SAO settings,\n      //and freeing GL objects specific to the old model.\n      if (this.is2d) {\n        this.is2d = undefined;\n        this.removeOverlayScene(selection2dOverlayName(this.model));\n        _renderer.exit2DMode();\n      } else {\n        _oldLightPreset = _currentLightPreset;\n      }\n\n      if (this.model.is3d()) {\n        // LMV-5655: Keep track of the 3d light preset\n        _3dLightPreset = _currentLightPreset;\n      }\n\n      _renderer.beginScene(this.scene, this.camera, this.lightsOn ? this.lights : this.no_lights, true);\n      _renderer.composeFinalFrame(true);\n    }\n\n    // Destruct any ongoing loaders, in case the loading starts, but the model root hasn't created yet.\n    if (this.loaders) {\n      this.loaders.forEach(function (loader) {\n        loader.dtor();\n      });\n      this.loaders = [];\n    }\n\n    var models = _modelQueue.getModels();\n    for (var i = models.length - 1; i >= 0; i--) {\n      this.unloadModel(models[i]);}\n\n    this.model = null;\n  };\n\n  var createSelectionScene = function createSelectionScene(name, materialPre, materialPost) {\n    materialPre.depthWrite = false;\n    materialPre.depthTest = true;\n    materialPre.side = THREE.DoubleSide;\n\n    materialPost.depthWrite = false;\n    materialPost.depthTest = true;\n    materialPost.side = THREE.DoubleSide;\n\n    // make selection material support instanced geometry\n    _materials.addInstancingSupport(materialPre);\n    _materials.addInstancingSupport(materialPost);\n\n    _this.createOverlayScene(name, materialPre, materialPost);\n  };\n\n  var setupSelectionHighlight = function setupSelectionHighlight() {\n\n    _this.selectionMaterialBase = new THREE.MeshPhongMaterial({ specular: 0x080808, ambient: 0, opacity: 1.0, transparent: false });\n    _this.selectionMaterialTop = new THREE.MeshPhongMaterial({ specular: 0x080808, ambient: 0, opacity: 0.15, transparent: true });\n    _this.selectionMaterialTop.packedNormals = true;\n    _this.selectionMaterialBase.packedNormals = true;\n    createSelectionScene(\"selection\", _this.selectionMaterialBase, _this.selectionMaterialTop);\n\n    _this.highlightMaterial = new THREE.MeshPhongMaterial({ specular: 0x080808, ambient: 0, opacity: 1.0, transparent: false });\n    _this.highlightMaterial.packedNormals = true;\n    _materials.addInstancingSupport(_this.highlightMaterial);\n    _materials.addMaterial(\"__highlightMaterial__\", _this.highlightMaterial, true);\n\n  };\n\n  this.createOverlayScene = function (name, materialPre, materialPost, camera) {\n    if (materialPre) {\n      _materials.addOverrideMaterial(name + \"_pre\", materialPre);\n    }\n\n    if (materialPost) {\n      _materials.addOverrideMaterial(name + \"_post\", materialPost);\n    }\n\n    var s = new THREE.Scene();\n    s.__lights = this.scene.__lights;\n    this.overlayScenes[name] = {\n      scene: s,\n      camera: camera,\n      materialName: name,\n      materialPre: materialPre,\n      materialPost: materialPost };\n\n  };\n\n  this.removeOverlayScene = function (name) {\n\n    var overlay = this.overlayScenes[name];\n    if (overlay) {\n      var scene = this.overlayScenes[name];\n      scene.materialPre && _materials.removeMaterial(scene.materialName + \"_pre\");\n      scene.materialPost && _materials.removeMaterial(scene.materialName + \"_post\");\n      delete this.overlayScenes[name];\n      this.invalidate(false, false, true);\n    }\n  };\n\n  this.addOverlay = function (overlayName, mesh) {\n    if (this.overlayScenes[overlayName]) {\n      this.overlayScenes[overlayName].scene.add(mesh);\n      this.invalidate(false, false, true);\n    }\n  };\n\n  this.addMultipleOverlays = function (overlayName, meshes) {\n    for (var i in meshes) {\n      if (!meshes.hasOwnProperty(i)) continue;\n      this.addOverlay(overlayName, meshes[i]);\n    }\n  };\n\n  this.removeOverlay = function (overlayName, mesh) {\n    if (this.overlayScenes[overlayName]) {\n      this.overlayScenes[overlayName].scene.remove(mesh);\n      this.invalidate(false, false, true);\n    }\n  };\n\n  this.removeMultipleOverlays = function (overlayName, meshes) {\n    for (var i in meshes) {\n      if (!meshes.hasOwnProperty(i)) continue;\n      this.removeOverlay(overlayName, meshes[i]);\n    }\n  };\n\n  this.clearOverlay = function (overlayName) {\n\n    if (!this.overlayScenes[overlayName])\n    return;\n\n    var scene = this.overlayScenes[overlayName].scene;\n    var obj, i;\n    for (i = scene.children.length - 1; i >= 0; --i) {\n      obj = scene.children[i];\n      if (obj) {\n        scene.remove(obj);\n      }\n    }\n\n    this.invalidate(false, false, true);\n  };\n\n  this.setClearColors = function (r, g, b, r2, g2, b2) {\n    this.clearColorTop = new THREE.Vector3(r / 255.0, g / 255.0, b / 255.0);\n    this.clearColorBottom = new THREE.Vector3(r2 / 255.0, g2 / 255.0, b2 / 255.0);\n\n    //If we are using the background color as environment also,\n    //create an environment map texture from the new colors\n    //This is too magical and should not be necessary here -- it's done when calling setLightPreset with a light preset\n    //that does not use explicit cube map.\n    /*\n    if (!_materials._reflectionMap || _materials._reflectionMap.isBgColor) { // TODO: don't access internal members of matman\n        var cubeMap = this.loadCubeMapFromColors(this.clearColorTop, this.clearColorBottom);\n        _renderer.setCubeMap(cubeMap);\n        _renderer.toggleEnvMapBackground(_envMapBackground);\n        this.invalidate(true);\n    }\n    */\n\n    this.updateClearColors();\n    if (_groundReflection)\n    _groundReflection.setClearColors(this.clearColorTop, this.clearColorBottom, isMobileDevice());\n    _needsClear = true;\n    this.fireRenderOptionChanged();\n  };\n\n  this.setClearAlpha = function (alpha) {\n    _renderer.setClearAlpha(alpha);\n  };\n\n  //Similar to THREE.Box3.setFromObject, but uses the precomputed bboxes of the\n  //objects instead of doing it per vertex.\n  var _box3 = new THREE.Box3();\n  function computeObjectBounds(dst, object, bboxFilter) {\n\n    object.updateMatrixWorld(true);\n\n    object.traverse(function (node) {\n\n      var geometry = node.geometry;\n\n      // Special-handling for selection proxies. Why needed?: \n      //  - selection proxies share model geometry\n      //  - A model BufferGeometry does not contain a BoundingBoxes (to save memory)\n      //  - A model geometry uses interleaved buffers, which is not supported by computeBoundingBox() anyway.\n      // So, the standard handling below does not work here and would just waste memory by attaching wrong bboxes to model geometry.\n      var isModelGeom = node.model && typeof node.fragId === 'number';\n      if (isModelGeom && !geometry.boundingBox) {\n\n        var fragList = isModelGeom && node.model.getFragmentList();\n        if (fragList) {\n          fragList.getWorldBounds(node.fragId, _box3);\n\n          if (!bboxFilter || bboxFilter(_box3)) {\n            dst.union(_box3);\n          }\n        }\n\n        // TODO: In case any overlay contains inverleaved geometry from anywhere else, this is still not\n        //       handled properly here.\n        return;\n      }\n\n      if (geometry !== undefined && node.visible) {\n\n        if (!geometry.boundingBox)\n        geometry.computeBoundingBox();\n\n        _box3.copy(geometry.boundingBox);\n        _box3.applyMatrix4(node.matrixWorld);\n\n        if (!bboxFilter || bboxFilter(_box3)) {\n          dst.union(_box3);\n        }\n      }\n\n    });\n  }\n\n  var _bounds = new THREE.Box3();\n  function getOverlayBounds(bboxFilter) {\n\n    _bounds.makeEmpty();\n\n    var overlays = _this.overlayScenes;\n\n    for (var key in overlays) {\n      if (!overlays.hasOwnProperty(key))\n      continue;\n\n      computeObjectBounds(_bounds, overlays[key].scene, bboxFilter);\n    }\n\n    //Also add the root scenes -- people add overlays there too\n    computeObjectBounds(_bounds, _this.scene, bboxFilter);\n    computeObjectBounds(_bounds, _this.sceneAfter, bboxFilter);\n\n    return _bounds;\n  }\n\n  this.getVisibleBounds = function (includeGhosted, includeOverlays, bboxFilter, excludeShadow) {\n    var result = new THREE.Box3();\n    if (!_modelQueue.isEmpty()) {\n      computeObjectBounds(result, this.scene, bboxFilter);\n      result = _modelQueue.getVisibleBounds(includeGhosted, bboxFilter, excludeShadow).union(result);\n\n      if (includeOverlays) {\n        result = getOverlayBounds(bboxFilter).union(result);\n      }\n    }\n    return result;\n  };\n\n  this.getFitBounds = function (ignoreSelection)\n  {\n    var bounds;\n\n    // If there is a valid selection, use its bounds\n    if (!ignoreSelection && this.selector !== null) {\n      bounds = this.selector.getSelectionBounds();\n    }\n\n    // Otherwise, if there is a valid isolation, use its bounds\n    if (!bounds || bounds.empty()) {\n      bounds = this.getVisibleBounds();\n    }\n    //console.log(\"  getFitBounds bounds are \" + + bounds.min.x +\", \"+ bounds.min.y + \" to \" + bounds.max.x +\", \"+ bounds.max.y);\n\n    return bounds;\n  };\n\n  this.getRenderProxy = function (model, fragId) {var _model$getFragmentLis;\n    //currently there is a single model so the mapping\n    //of fragId to render mesh is 1:1.\n    return (_model$getFragmentLis = model.getFragmentList()) === null || _model$getFragmentLis === void 0 ? void 0 : _model$getFragmentLis.getVizmesh(fragId);\n  };\n\n  this.getLayersRoot = function () {\n    return this.layers.getRoot();\n  };\n\n  this.getFragmentProxy = function (model, fragId) {\n    return new FragmentPointer(model.getFragmentList(), fragId);\n  };\n\n  this.getRenderProxyCount = function (model) {\n    return model.getFragmentList().getCount();\n  };\n\n  this.getRenderProxyDbIds = function (model, fragId) {\n    return model.getFragmentList().getDbIds(fragId);\n  };\n\n  this.isWholeModelVisible = function (model) {\n    return _modelQueue ? _modelQueue.areAllVisible() : true;\n  };\n\n  this.isNodeVisible = function (nodeId, model) {\n    return this.visibilityManager.isNodeVisible(model, nodeId); // swapped arguments\n  };\n\n  this.highlightObjectNode = function (model, dbId, value, simpleHighlight) {\n\n    dbId = model.reverseMapDbId(dbId);\n\n    if (model.is2d()) {\n      _materials.highlightObject2D(dbId, value, model.id); //update the 2d object id texture\n      this.invalidate(false, false, true);\n    }\n\n    this.renderer().setDbIdForEdgeDetection(value && !simpleHighlight ? dbId : 0, value ? model.id : 0);\n\n    var scope = this;\n    var instanceTree = model.getData().instanceTree;\n\n    //TODO: There can be instance tree in the case of 2D drawing, but\n    //we do not currently populate the node tree with the virtual fragment ids\n    //that map 2d objects to 2d consolidated meshes, hence the use of dbId2fragId in the else condition\n    if (instanceTree && !model.is2d()) {\n      // set model to useIdBufferSelection and model needs to have its dbId2fragId map \n      if (model.useIdBufferSelection) {\n        var fragId = model.getData().fragments.dbId2fragId[dbId];\n        scope.highlightFragment(model, fragId, value, simpleHighlight);\n      } else {\n        instanceTree.enumNodeFragments(dbId, function (fragId) {\n          scope.highlightFragment(model, fragId, value, simpleHighlight);\n        }, false);\n      }\n    } else {\n      var fragId = dbId;\n\n      if (model.is2d() && model.getData().fragments)\n      fragId = model.getData().fragments.dbId2fragId[dbId];\n\n      if (Array.isArray(fragId))\n      for (var i = 0; i < fragId.length; i++) {\n        scope.highlightFragment(model, fragId[i], value, simpleHighlight);} else\n\n      scope.highlightFragment(model, fragId, value, simpleHighlight);\n\n    }\n\n  };\n\n  this.highlightFragment = function (model, fragId, value, simpleHighlight) {\n\n    var mesh = this.getRenderProxy(model, fragId);\n\n    if (!mesh)\n    return;\n\n    // And also add a mesh to the overlays in case we need that.\n    // For 2D that is always the case, while for 3D it's done\n    // for \"fancy\" single-selection where we draw an outline for the object as post-processing step.\n    // Overlay is only used for 2D, Point cloud, transparent and themeing colored objects.\n    var useOverlay = !simpleHighlight || mesh.is2d || mesh.isPoint || mesh.themingColor;\n\n    var highlightId = model.id + \":\" + fragId;\n\n    if (useOverlay) {\n      var overlayName = \"selection\";\n      if (model.is2d()) overlayName = selection2dOverlayName(model);\n      if (mesh.isPoint) overlayName += \"_points\";\n\n      if (value)\n      {\n        if (mesh.is2d && this.selectionMeshes.hasOwnProperty(highlightId)) {\n          // 2d has multiple dbids in a single fragment. As each dbid\n          // is highlighted we count the number so we know when the mesh\n          // is no longer needed.\n          ++this.selectionMeshes[highlightId]._lmv_highlightCount;\n        } else {\n          var selectionProxy;\n\n          // Make sure it all worked\n          if (!mesh || !mesh.geometry)\n          return;\n\n          if (mesh.isPoint) {\n            // using an override material would overwrite the point size for\n            // each point cloud, so we apply the selection colour to the\n            // duplicated geometry here instead by copying the material\n            var selectionMaterial = mesh.material.clone();\n            selectionMaterial.color = this.selectionMaterialBase.color;\n            selectionMaterial.needsUpdate = true;\n            if (selectionMaterial.defines && mesh.geometry.attributes[\"flagp\"]) {\n              selectionMaterial.defines[\"PARTICLE_FLAGS\"] = 1;\n            }\n\n            selectionProxy = new THREE.Mesh(mesh.geometry, selectionMaterial);\n          } else {\n            selectionProxy = new THREE.Mesh(mesh.geometry, mesh.material);\n          }\n\n          selectionProxy.matrix.copy(mesh.matrixWorld);\n          selectionProxy.matrixAutoUpdate = false;\n          selectionProxy.matrixWorldNeedsUpdate = true;\n\n          selectionProxy.frustumCulled = false;\n          selectionProxy.model = model;\n          selectionProxy.fragId = fragId;\n          selectionProxy._lmv_highlightCount = 1;\n\n          this.addOverlay(overlayName, selectionProxy);\n\n          this.selectionMeshes[highlightId] = selectionProxy;\n        }\n      } else\n      if (this.selectionMeshes.hasOwnProperty(highlightId)) {\n        var proxy = this.selectionMeshes[highlightId];\n        if (--proxy._lmv_highlightCount <= 0) {\n          this.removeOverlay(overlayName, proxy);\n          delete this.selectionMeshes[highlightId];\n        }\n      }\n    }\n\n    if (!useOverlay || !value) {\n      //Case where highlighting was done directly in the primary render queue\n      //and we need to repaint to clear it. This happens when multiple\n      //nodes are highlighted using e.g. right click in the tree view\n      if (model.setHighlighted(fragId, value)) //or update the vizflags in the render queue for 3D objects\n        this.invalidate(true);\n    }\n  };\n\n  this.explode = function (scale) {\n\n    scale = Number(scale);\n    if (scale == _explodeScale)\n    return false;\n\n    _explodeScale = scale;\n\n    this.refreshExplode();\n\n    this.api.dispatchEvent({ type: et.EXPLODE_CHANGE_EVENT, scale: scale });\n    return true;\n  };\n\n\n  this.refreshExplode = function () {\n\n    _modelQueue.explode(_explodeScale);\n\n    //force a repaint and a clear\n    this.sceneUpdated(true);\n  };\n\n  /**\n      * Gets the last applied explode scale\n      */\n  this.getExplodeScale = function ()\n  {\n    return _explodeScale;\n  };\n\n  /**\n      * Lock dbid so it doesn't explode\n      *\n      * Not applicable to 2D.\n      */\n  this.lockExplode = function (dbids, lock, model)\n  {\n    model = model || this.model;\n    var instanceTree = model.getData().instanceTree;\n    if (!instanceTree)\n    return false;\n\n    var lockDbid = function lockDbid(acc, dbid) {\n      instanceTree.enumNodeChildren(dbid, function (child) {\n        acc = instanceTree.lockNodeExplode(child, lock) || acc;\n      }, true);\n      return acc;\n    };\n\n    var changed;\n    if (Array.isArray(dbids)) {\n      changed = dbids.reduce(lockDbid, false);\n    } else {\n      changed = lockDbid(false, dbids);\n    }\n\n    if (changed && _explodeScale > 0) {\n      _modelQueue.explode(_explodeScale);\n      this.sceneUpdated(true);\n    }\n    return changed;\n  };\n\n  /**\n      * Check whether a dbid is locked so it doesn't explode\n      *\n      * Not applicable to 2D.\n      */\n  this.isExplodeLocked = function (dbid, model)\n  {\n    model = model || this.model;\n    var instanceTree = model.getData().instanceTree;\n    return instanceTree && instanceTree.isNodeExplodeLocked(dbid);\n  };\n\n\n  /* simple function to set the brightness of the ghosting.\n      * Simply sets another colour that is better for brighter environments\n      */\n  this.setGhostingBrightness = function (darkerFade)\n  {\n    var color = new THREE.Color(darkerFade ? 0x101010 : 0xffffff);\n    function setColor(mat) {\n      mat.color = color;\n    }\n\n    setColor(this.fadeMaterial);\n    this.fadeMaterial.variants && this.fadeMaterial.variants.forEach(setColor);\n  };\n\n\n  this.loadCubeMapFromColors = function (ctop, cbot) {\n    var texture = CreateCubeMapFromColors(ctop, cbot);\n    texture.isBgColor = true;\n    _materials.setReflectionMap(texture);\n    return texture;\n  };\n\n  this.loadCubeMap = function (path, exposure) {\n\n    this._reflectionMapPath = path;\n\n    var mapDecodeDone = function mapDecodeDone(map) {\n\n      //If setCubeMap was called twice quickly, it's possible that\n      //a texture map that is no longer desired loads after the one that was\n      //set last. In such case, just make the undesirable disappear into the void.\n      if (path !== _this._reflectionMapPath)\n      return;\n\n      // It is possible for this load to complete after the model has been canceled\n      if (!_materials)\n      return;\n\n      _materials.setReflectionMap(map);\n      _this.invalidate(true);\n\n      if (!map) {\n        _this.loadCubeMapFromColors(_this.clearColorTop, _this.clearColorBottom);\n      } else if (!LightPresets[_currentLightPreset].useIrradianceAsBackground) {\n        _renderer.setCubeMap(map);\n      }\n    };\n\n    return TextureLoader.loadCubeMap(path, exposure, mapDecodeDone);\n  };\n\n\n  this.loadIrradianceMap = function (path, exposure) {\n\n    this._irradianceMapPath = path;\n\n    var mapDecodeDone = function mapDecodeDone(map) {\n\n      //If setCubeMap was called twice quickly, it's possible that\n      //a texture map that is no longer desired loads after the one that was\n      //set last. In such case, just make the undesirable disappear into the void.\n      if (path !== _this._irradianceMapPath)\n      return;\n\n      // It is possible for this load to complete after the model has been canceled\n      if (!_materials)\n      return;\n\n      _materials.setIrradianceMap(map);\n      _this.invalidate(true);\n\n      if (LightPresets[_currentLightPreset].useIrradianceAsBackground) {\n        _renderer.setCubeMap(map);\n      }\n    };\n\n    return TextureLoader.loadCubeMap(path, exposure, mapDecodeDone);\n\n  };\n\n  this.setCurrentLightPreset = function (index) {\n    _currentLightPreset = index;\n  };\n\n  this.setLightPreset = function (index, force, callback)\n  {\n    //We do not have the ability to load the environment map textures on node.js yet,\n    //because they use plain XHR that needs to be converted to use TextureLoader.\n    //So we override the environment to zero, which does not use external environment maps.\n    if (isNodeJS())\n    index = 0;\n\n    // make sure that lights are created\n    this.initLights();\n\n    if (_currentLightPreset === index && !force) {\n      callback && callback();\n      return;\n    }\n\n    // Reset index in cases the index out of range.\n    // This could happen, if we update the light preset list and user\n    // has a local web storage which stores the last accessed preset index which is potentially\n    // out of range with respect to the new preset list.\n    if (index < 0 || LightPresets.length <= index) {\n      index = DefaultLightPreset;\n    }\n    _currentLightPreset = index;\n\n    // If we don't have any models, then we save the light preset\n    // so it is set when a model is added. This is to stop unnecessary\n    // loading of environment maps for 2D models.\n    if (_modelQueue.isEmpty()) {\n      _oldLightPreset = _currentLightPreset;\n      _oldCallback = callback;\n      return;\n    }\n\n    var preset = LightPresets[index];\n\n    //if the light preset has a specific background color, set that\n    //This has to be done first, because the encironment map may use\n    //the background colors in case no environment map is explicitly given.\n    var c = preset.bgColorGradient;\n    if (!c)\n    c = BackgroundPresets[\"Custom\"];\n    this.setClearColors(c[0], c[1], c[2], c[3], c[4], c[5]);\n\n    //If allowed, display the environment as background (most likely the irradiance map will be used\n    //by the AEC presets, so it will be almost like a color gradient)\n    if (preset.useIrradianceAsBackground !== undefined) {\n      if (this.api.prefs.hasTag('envMapBackground', 'ignore-producer')) {\n        logger.debug('setLightPreset(): envMapBackground is locked. No changes.');\n      } else {\n        this.api.prefs.tag('no-storage', 'envMapBackground');\n        this.api.setEnvMapBackground(preset.useIrradianceAsBackground);\n      }\n    }\n\n    if (preset.path) {\n\n      var pathPrefix = \"res/environments/\" + preset.path;\n      var reflPath = getResourceUrl(pathPrefix + \"_mipdrop.\" + (preset.type || \"\") + \".dds\");\n      var irrPath = getResourceUrl(pathPrefix + \"_irr.\" + (preset.type || \"\") + \".dds\");\n\n      this.loadIrradianceMap(irrPath, preset.E_bias);\n      this.loadCubeMap(reflPath, preset.E_bias);\n\n      //Set exposure that the environment was baked with.\n      //This has to be known at baking time and is applied\n      //by the shader.\n      _materials.setEnvExposure(-preset.E_bias);\n      _renderer.setEnvExposure(-preset.E_bias);\n\n      this.setTonemapExposureBias(preset.E_bias);\n      this.setTonemapMethod(preset.tonemap);\n\n      this.setGhostingBrightness(preset.darkerFade);\n    } else\n    {\n      var cubeMap = this.loadCubeMapFromColors(this.clearColorTop, this.clearColorBottom);\n      _renderer.setCubeMap(cubeMap);\n      _materials.setIrradianceMap(null);\n      //_materials.setReflectionMap(cubeMap); //will be set by the loadCubeMapFromColors call\n\n      //Set exposure that the environment was baked with.\n      //This has to be known at baking time and is applied\n      //by the shader.\n      _materials.setEnvExposure(-preset.E_bias || 0);\n      _renderer.setEnvExposure(-preset.E_bias || 0);\n\n      this.setTonemapExposureBias(preset.E_bias || 0);\n      this.setTonemapMethod(preset.tonemap || 0);\n\n      this.setGhostingBrightness(preset.darkerFade);\n\n      _renderer.toggleEnvMapBackground(_envMapBackground);\n\n\n      this.invalidate(true);\n    }\n\n\n    //To begin with, get the SAO defaults from the shader uniforms definition\n    //Note the scaling we apply to inverse scaling done by the setAOOptions API internally.\n    //This is not pretty....\n    var saoRadius = SAOShader.uniforms.radius.value;\n    var saoIntensity = SAOShader.uniforms.intensity.value;\n\n    //Check if the preset overrides the SAO settings\n    if (preset.hasOwnProperty(\"saoRadius\"))\n    saoRadius = preset.saoRadius;\n    if (preset.hasOwnProperty(\"saoIntensity\"))\n    saoIntensity = preset.saoIntensity;\n    _renderer.setAOOptions(saoRadius, saoIntensity);\n\n    var lightIntensity = _defaultLightIntensity;\n    if (preset.lightMultiplier !== null && preset.lightMultiplier !== undefined) {\n      lightIntensity = preset.lightMultiplier;\n    }\n\n    // init primary light direction used for shadows\n    _shadowLightDir.copy(_shadowLightDirDefault);\n    if (preset.lightDirection) {\n      // The presets describe the direction away from the light, while _shadowLightDir\n      // is the direction pointing to the light.\n      _shadowLightDir.fromArray(preset.lightDirection).negate();\n    }\n\n    // changing the shadow light direction invalidates the shadow-map\n    if (_shadowMaps) {\n      invalidateShadowMap();\n    }\n\n    if (this.dir_light1) {\n      this.dir_light1.intensity = lightIntensity;\n\n      if (preset.lightDirection) {\n        this.dir_light1.position.set(-preset.lightDirection[0], -preset.lightDirection[1], -preset.lightDirection[2]);\n      } else {\n        // set to default, otherwise the environment will inherit the direction from whatever previous environment was chosen\n        this.dir_light1.position.copy(_lightDirDefault);\n      }\n\n    }\n\n    _materials.setEnvRotation(preset.rotation || 0.0);\n    _renderer.setEnvRotation(preset.rotation || 0.0);\n\n    if (_groundReflection) _groundReflection.setEnvRotation(preset.rotation || 0.0);\n\n    // toggle lights on/off based on lightMultiplier\n    this.toggleLights(lightIntensity !== 0.0);\n\n    this.invalidate(true, false, true);\n\n    this.fireRenderOptionChanged();\n\n    // Call the callback\n    callback && callback();\n  };\n\n  this.setLightPresetFromFile = function (model)\n  {\n    if (!model || model.is2d()) {\n      return false;\n    }\n\n    var ignoreProducer;\n\n    // TODO add more control for environments\n    // the user cannot set anything expect the style from current UI\n    // currently only the style can be selected.\n    // TODO We cannot control these values so comment out for now\n    var grndReflection = model.getMetadata('renderEnvironmentGroundReflection', 'value', null);\n    ignoreProducer = this.api.prefs.hasTag(Prefs3D.GROUND_REFLECTION, 'ignore-producer');\n    if (grndReflection !== null && !ignoreProducer) {\n      this.api.prefs.tag('no-storage', Prefs3D.GROUND_REFLECTION);\n      this.api.setGroundReflection(grndReflection);\n    }\n\n    var grndShadow = model.getMetadata('renderEnvironmentGroundShadow', 'value', null);\n    ignoreProducer = this.api.prefs.hasTag(Prefs3D.GROUND_SHADOW, 'ignore-producer');\n    if (grndShadow !== null && !ignoreProducer) {\n      this.api.prefs.tag('no-storage', Prefs3D.GROUND_SHADOW);\n      this.api.setGroundShadow(grndShadow);\n    }\n\n    var ambientShadows = model.getMetadata('renderEnvironmentAmbientShadows', 'value', null);\n    ignoreProducer = this.api.prefs.hasTag(Prefs3D.AMBIENT_SHADOWS, 'ignore-producer');\n    if (ambientShadows !== null && !ignoreProducer) {\n      this.api.prefs.tag('no-storage', Prefs3D.AMBIENT_SHADOWS);\n      // kludgey, but maintains previous API linking these two different algorithms together\n      this.api.setQualityLevel(ambientShadows, _renderer.getAntialiasing());\n    }\n\n    var displayLines = model.getMetadata('renderEnvironmentDisplayLines', 'value', null);\n    ignoreProducer = this.api.prefs.hasTag(Prefs3D.LINE_RENDERING, 'ignore-producer');\n    if (displayLines !== null && !ignoreProducer) {\n      this.api.prefs.tag('no-storage', Prefs3D.LINE_RENDERING);\n      this.api.hideLines(!displayLines);\n    }\n\n    var displayPoints = model.getMetadata('renderEnvironmentDisplayPoints', 'value', null);\n    ignoreProducer = this.api.prefs.hasTag(Prefs.POINT_RENDERING, 'ignore-producer');\n    if (displayPoints !== null && !ignoreProducer) {\n      this.api.prefs.tag('no-storage', Prefs.POINT_RENDERING);\n      this.api.hidePoints(!displayPoints);\n    }\n\n    var displayEdges = model.getMetadata('renderEnvironmentDisplayEdges', 'value', null);\n    ignoreProducer = this.api.prefs.hasTag(Prefs3D.EDGE_RENDERING, 'ignore-producer');\n    if (displayEdges !== null && !ignoreProducer) {\n      this.api.prefs.tag('no-storage', Prefs3D.EDGE_RENDERING);\n      this.api.setDisplayEdges(!isMobileDevice() && !!displayEdges);\n    }\n\n    var style = model.getMetadata('renderEnvironmentStyle', 'value', null);\n    var preset = LightPresets.filter(function (lightPreset) {\n      return lightPreset.name === style;\n    })[0];\n    ignoreProducer = this.api.prefs.hasTag(Prefs3D.LIGHT_PRESET, 'ignore-producer');\n    if (preset && !ignoreProducer) {\n      this.api.prefs.tag('no-storage', Prefs3D.LIGHT_PRESET);\n\n      // Create an env based on an existing preset\n      // and add it at the end of the official list\n      var env = ModelSettingsEnvironment;\n      if (!env) {\n        env = ModelSettingsEnvironment = {};\n        LightPresets.push(env);\n      }\n\n      // Copy existing Preset into custom Model-Loaded preset\n      copyLightPreset(preset, env);\n\n      // Override Name for use in UI\n      env.name = '(Custom: Model defined)'; // TODO: Localize\n\n      // Override Environment Exposure Values\n      var exposureBias = model.getMetadata('renderEnvironmentExposureBias', 'value', null);\n      var exposureBase = model.getMetadata('renderEnvironmentExposureBase', 'value', null);\n      if (exposureBias !== null && exposureBase !== null) {\n        env.E_bias = exposureBias + exposureBase;\n      }\n\n      // Override Environment Background Color\n      // Note that there's a specific preset for background color\n      var bgColor = model.getMetadata('renderEnvironmentBackgroundColor', 'value', null);\n      ignoreProducer = this.api.prefs.hasTag(Prefs.BACKGROUND_COLOR_PRESET, 'ignore-producer');\n      if (bgColor && !ignoreProducer) {\n        env.bgColorGradient = [\n        255.0 * bgColor[0], 255.0 * bgColor[1], 255.0 * bgColor[2],\n        255.0 * bgColor[0], 255.0 * bgColor[1], 255.0 * bgColor[2]];\n\n      }\n\n      // Override Environment Rotation\n      var envRotation = model.getMetadata('renderEnvironmentRotation', 'value', null); //assumed radians\n      if (envRotation !== null) {\n        env.rotation = envRotation;\n      }\n\n      var i = LightPresets.indexOf(env);\n      this.setLightPreset(i, true);\n    }\n\n    var bgEnvironment = model.getMetadata('renderEnvironmentBackgroundFromEnvironment', 'value', null);\n    ignoreProducer = this.api.prefs.hasTag(Prefs3D.ENV_MAP_BACKGROUND, 'ignore-producer');\n    if (bgEnvironment !== null && !ignoreProducer) {\n      this.api.prefs.tag('no-storage', Prefs3D.ENV_MAP_BACKGROUND);\n      this.api.setEnvMapBackground(bgEnvironment);\n    }\n\n    // Important to return the model defined preset\n    return preset;\n  };\n\n  this.setLightPresetForAec = function () {\n\n    //Find the AEC light preset\n    var presetName = getGlobal().DefaultLightPresetAec || \"Boardwalk\";\n    var idx = -1;\n    for (var i = 0; i < LightPresets.length; i++) {\n      if (LightPresets[i].name === presetName) {\n        idx = i;\n        break;\n      }\n    }\n\n    if (idx >= 0) {\n      if (this.api.prefs.hasTag('lightPreset', 'ignore-producer')) {\n        logger.debug('setLightPresetForAec(): lightPreset is locked. No changes.');\n      } else {\n        this.api.prefs.tag('no-storage', 'lightPreset');\n\n        this.setLightPreset(idx, true, function () {\n          //When AEC preset is set, we lock changes to the envMapBackground in order to prevent\n          //setLightPresetFromFile from changing our settings. This is ugly, but it works around the\n          //followng issue: Revit files do not set renderEnvironmentStyle in the metadata, which\n          //indicates that we should not override any environment settings from the file.\n          //However, Max files would like to have a null environment style with non-null specific overrides.\n          //The issue comes that the other overrides have a default value of false in LMV, so\n          //we mistakenly use those overrides to nuke the AEC settings that were set here.\n          //So here, we lock the setting to prevent it from being nuked in setLightPresetFromFile.\n          this.api.prefs.tag('ignore-producer', 'envMapBackground');\n        }.bind(this));\n        this.saveLightPreset();\n      }\n    }\n\n    //If allowed, display edge topology\n    if (this.api.prefs.hasTag('edgeRendering', 'ignore-producer')) {\n      logger.debug('setLightPresetForAec(): edgeRendering is locked. No changes.');\n    } else {\n      this.api.prefs.tag('no-storage', 'edgeRendering');\n      this.api.setDisplayEdges(!isMobileDevice());\n    }\n\n    return true;\n  };\n\n\n  this.setAOHeuristics = function (model) {\n\n    //Decide on what SSAO settings to use.\n\n    var metersPerModelUnit = model.getUnitScale();\n\n    // First, check the metadata for explcit AO settings and use them if present.\n    var aoRadius = model.getMetadata('renderEnvironmentAmbientShadows', 'radius', undefined);\n    var aoIntensity = model.getMetadata('renderEnvironmentAmbientShadows', 'intensity', undefined);\n    var aoOpacity = model.getMetadata('renderEnvironmentAmbientShadows', 'opacity', undefined);\n    if (aoRadius !== undefined || aoIntensity !== undefined || aoOpacity !== undefined) {\n      _renderer.setAOOptions(aoRadius / metersPerModelUnit, aoIntensity, aoOpacity);\n    } else if (model.isAEC()) {\n      var largeRadius = metersPerModelUnit > 0.3;\n      if (largeRadius) {\n        //AEC model in meters or feet -- probably building\n        //use room-sized radius\n        _renderer.setAOOptions(4.0 / metersPerModelUnit, 1.0, 0.625);\n      } else {\n        //AEC model in inches or cm -- most likely a factory floor with lots\n        //of small things / pipes / nuts / bolts, use smaller radius.\n        _renderer.setAOOptions(0.25 / metersPerModelUnit, 1.0, 0.625);\n      }\n    } else {\n      // Compute a rough size for the model, so that we can set a reasonable AO radius.\n      // This simple approach is reasonable for mechanical models, but is probably too\n      // large a value for architectural models, where the viewer is inside the model\n      // and so the model itself is relatively large compared to the viewer.\n      var bbox = model.getData().bbox;\n      var diagonalLength = bbox.size().length();\n\n      // 10 works well as a default for most models, including\n      // architectural scenes. Surprising! But, for small models,\n      // where for some reason the model is not in \"human-sized units\",\n      // 0.05 says the ambient occlusion should extend 5% of the\n      // diagonal length of the model.\n      // The 10 here should match the SAOShader.js radius of 10.\n      _renderer.setAOOptions(Math.min(10.0, 0.05 * diagonalLength));\n    }\n\n\n  };\n\n\n  this.setTonemapMethod = function (index) {\n\n    if (index == _renderer.getToneMapMethod())\n    return;\n\n    _renderer.setTonemapMethod(index);\n    _materials.setTonemapMethod(index);\n\n    this.fireRenderOptionChanged();\n    this.invalidate(true);\n  };\n\n  this.setTonemapExposureBias = function (bias) {\n\n    if (bias == _renderer.getExposureBias())\n    return;\n\n    _renderer.setTonemapExposureBias(bias);\n    _materials.setTonemapExposureBias(bias);\n\n    this.fireRenderOptionChanged();\n    this.invalidate(true);\n  };\n\n  this.setRenderingPrefsFor2D = function (is2D) {\n\n    if (!isNodeJS()) {\n      var value = is2D ? false : !!this.api.prefs.envMapBackground;\n      this.toggleEnvMapBackground(value);\n    }\n  };\n\n\n  /**\n      * Unloads model, frees memory, as much as possible.\n      */\n  this.dtor = function () {\n    var _window = _this.getWindow();\n    _window.cancelAnimationFrame(_reqid);\n    this.api.removeEventListener(et.MODEL_ROOT_LOADED_EVENT, _stdSurfaceLoadListener);\n    this.api.removeEventListener(et.MODEL_ROOT_LOADED_EVENT, _onModelRootLoaded);\n\n    this.unloadCurrentModel();\n\n    // this.controls is uninitialized by Viewer3D, since it was initialized there\n    this.controls = null;\n    this.canvas = null;\n    clearInterval(this.interval);\n\n    this.loader = null;\n\n    this.selector.dtor();\n    this.selector = null;\n\n    this.model = null;\n    this.layers = null;\n    this.visibilityManager = null;\n\n    if (_geomCache) {\n      _geomCache.removeViewer(this.api);\n      _geomCache = null;\n    }\n\n    _modelQueue = null;\n    _renderer = null;\n\n    _materials.refCount--;\n\n    if (_materials.refCount === 0) {\n      _materials.dtor();\n    }\n\n    _materials = null;\n\n    if (_webglrender) {\n      _webglrender.refCount--;\n\n      if (_webglrender.refCount === 0) {\n        _webglrender.webglcontextlost = null;\n        _webglrender.domElement = null;\n        _webglrender.context = null;\n      }\n\n      _webglrender = null;\n    }\n  };\n\n  this.hideLines = function (hide) {\n    if (_modelQueue && !_modelQueue.isEmpty()) {\n      _modelQueue.hideLines(hide);\n      this.sceneUpdated(true);\n    }\n  };\n\n  this.hidePoints = function (hide) {\n    if (_modelQueue && !_modelQueue.isEmpty()) {\n      _modelQueue.hidePoints(hide);\n      this.sceneUpdated(true);\n    }\n  };\n\n  this.setDisplayEdges = function (show) {\n\n    _renderer.toggleEdges(show);\n\n    //If edges are turned off, turn off polygon offset also.\n    //Except if the model has line geometries in the scene, then do not turn off\n    //polygon offset.\n    var needsPO = show;\n\n    if (!show) {\n      // return false, not undefined\n      needsPO = !!(this.model && this.model.getData().hasLines);\n    }\n\n    _materials.togglePolygonOffset(needsPO);\n    _renderer.setDepthMaterialOffset(_materials.getPolygonOffsetOn(), _materials.getPolygonOffsetFactor(), _materials.getPolygonOffsetUnits());\n\n    this.invalidate(true);\n  };\n\n  /**\n      * Sets surface materials to double sided or single sided.\n      * @param {boolean} enable - sets materials to double sided if set to true.\n      * @param {Autodesk.Viewing.Model} model - model instance\n      * @param {boolean} [update=true] - Updates the scene \n      */\n  this.setDoubleSided = function (enable, model) {var update = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : true;\n    model = model || this.model;\n\n    // Double sided materials will only be set to 3d models.\n    if (model.is2d()) {\n      return;\n    }\n\n    var modelData = model.getData();\n\n    // Do not apply if the model data is not available.\n    if (!modelData) {\n      return;\n    }\n\n    // Sets surface materials to either double sided or single sided\n    this.matman().setDoubleSided(enable, model);\n    update && this.sceneUpdated();\n  };\n\n  this.getAllCutPlanes = function () {\n    // create array of the planes by combining all cut plane sets\n    var allPlanes = undefined;\n    for (var key in _cutPlaneSets) {\n      var cps = _cutPlaneSets[key];\n      if (cps && cps.length) {\n        if (!allPlanes) {\n          allPlanes = cps;\n        } else if (key === _cutPlaneSetFor2DRendering) {\n          // UnitsPerPixel only consider the first cutplane. So, this one must go first.\n          allPlanes = cps.concat(allPlanes);\n        } else {\n          // append cutplanes\n          allPlanes = allPlanes.concat(cps);\n        }\n      }\n    }\n    return allPlanes;\n  };\n\n  // Set cutplane array by combining the cutplanes specified by different tools\n  this.updateCutPlanes = function () {\n    var allPlanes = this.getAllCutPlanes();\n    this.setCutPlanes(allPlanes);\n  };\n\n\n  /**\n      * A cutplane set is an array of cutplanes that can be controlled individually by a single tool\n      * without affecting other tools' cutplanes.\n      *  @param {string} cutPlaneSetName\n      *  @param {Vector4[]|null} [planes]\n      *  @param {Boolean} [fireEvent] - if set to false the av.CUTPLANES_CHANGE_EVENT event will not be fired.\n      */\n  this.setCutPlaneSet = function (cutPlaneSetName, planes) {var fireEvent = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : true;\n    // store copy of plane array\n    _cutPlaneSets[cutPlaneSetName] = planes ? planes.slice() : undefined;\n    if (fireEvent) {\n      this.updateCutPlanes();\n    } else {\n      var allPlanes = this.getAllCutPlanes();\n      this.setCutPlanesInScene(allPlanes);\n    }\n  };\n\n  /** Defines which cutplane is used to adjust 2D rendering. This is used by SectionTool\n      * to make sure that 2D rendering resolution is properly adjusted for its cutplane.\n      *  @param {string] cutPlaneSetName */\n  this.setCutPlaneSetFor2DRendering = function (cutPlaneSetName) {\n    _cutPlaneSetFor2DRendering = cutPlaneSetName;\n    this.updateCutPlanes();\n  };\n\n  this.getCutPlaneSet = function (cutPlaneSetName) {\n    return _cutPlaneSets[cutPlaneSetName] || [];\n  };\n\n  /* @returns {string[]} names - names of all active (non-empty) cutplane sets. */\n  this.getCutPlaneSets = function () {\n    var result = [];\n    for (var key in _cutPlaneSets) {\n      var cp = _cutPlaneSets[key];\n      if (cp && cp.length) {\n        result.push(key);\n      }\n    }\n    return result;\n  };\n\n  this.getCutPlanes = function () {\n    return _materials.getCutPlanes();\n  };\n\n  /**\n      * Sets the material cutplanes and updates the scene.\n      * This function does not fire the Autodesk.Viewing.CUTPLANES_CHANGE_EVENT\n      * @see Viewer3DImpl#setCutPlanes\n      */\n  this.setCutPlanesInScene = function (planes) {\n    _renderer.toggleTwoSided(_materials.setCutPlanes(planes));\n    this.sceneUpdated();\n  };\n\n  this.setCutPlanes = function (planes) {\n    this.setCutPlanesInScene(planes);\n    this.api.dispatchEvent({ type: et.CUTPLANES_CHANGE_EVENT, planes: planes });\n  };\n\n  this.fireRenderOptionChanged = function () {\n\n    //If SAO is changing and we are using multiple\n    //render targets in the main material pass, we have\n    //to update the materials accordingly.\n    _materials.toggleMRTSetting(_renderer.mrtFlags());\n\n    this.api.dispatchEvent({ type: et.RENDER_OPTION_CHANGED_EVENT });\n  };\n\n  this.viewportToRay = function (vpVec, ray) {var camera = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : this.camera;\n    return camera.viewportToRay(vpVec, ray);\n  };\n\n  // Add \"meshes\" parameter, after we get meshes of the object using id buffer,\n  // then we just need to ray intersect this object instead of all objects of the model.\n  this.rayIntersect = function (ray, ignoreTransparent, dbIds, modelIds, intersections) {var _this4 = this;\n\n    var getDbIdAtPointFor2D = function getDbIdAtPointFor2D(point) {\n      var vpVec = new THREE.Vector3().copy(point);\n      vpVec.project(_this4.camera);\n      var res = [];\n      _renderer.idAtPixel(vpVec.x, vpVec.y, res);\n\n      return res;\n    };\n\n    var result = _modelQueue.rayIntersect(ray.origin, ray.direction, ignoreTransparent, dbIds, modelIds, intersections, getDbIdAtPointFor2D);\n\n    var extraScenes = [this.scene, this.sceneAfter];\n\n    for (var i = 0; i < extraScenes.length; i++) {\n      var scene = extraScenes[i];\n      if (scene.children.length) {\n        var raycaster = new THREE.Raycaster(ray.origin, ray.direction, this.camera.near, this.camera.far);\n\n        computeObjectBounds(_bounds, scene);\n        //TODO: This math approximately matches the heuristic in RenderScene.recomputeLinePrecision\n        //but it applies per scene. It might be good to unify the two once we know this works well.\n        raycaster.linePrecision = Math.min(1.0, _bounds.size().length() * 0.5 * 0.001);\n\n        var intersects = intersections || [];\n        VBIntersector.intersectObject(scene, raycaster, intersects, true);\n\n        if (intersects.length) {\n          if (!result || intersects[0].distance < result.distance) {\n            result = intersects[0];\n          }\n        }\n      }\n    }\n\n    if (!result)\n    return null;\n\n    if (result.dbId === undefined && result.fragId !== undefined /* 0 is a valid fragId */) {\n\n        result.dbId = result.model.getFragmentList().getDbIds(result.fragId);\n\n        if (!result.model.getData().instanceTree) {\n          //Case where there is no dbid to fragment id map. Create a 'virtual' node\n          //with node Id = fragment Id, so that selection works like\n          //each scene fragment is a scene node by itself.\n          result.dbId = result.fragId;\n        }\n      }\n\n    result.intersectPoint = result.point; // Backwards compatibility \n\n    return result;\n  };\n\n  this.castRayViewport = function () {\n\n    var _ray;\n\n    // Add \"meshes\" parameter, after we get meshes of the object using id buffer,\n    // then we just need to ray intersect this object instead of all objects of the model.\n    return function (vpVec, ignoreTransparent, dbIds, modelIds, intersections) {\n\n      _ray = _ray || new THREE.Ray();\n\n      if (!_modelQueue) {\n        return {};\n      }\n\n      this.viewportToRay(vpVec, _ray);\n\n      return this.rayIntersect(_ray, ignoreTransparent, dbIds, modelIds, intersections);\n    };\n\n  }();\n\n  this.getCanvasBoundingClientRect = function ()\n  {\n    if (this.canvasBoundingclientRectDirty) {\n      this.canvasBoundingclientRectDirty = false;\n      this.boundingClientRect = this.canvas.getBoundingClientRect();\n    }\n    return this.boundingClientRect;\n  };\n\n  this.clientToViewport = function (clientX, clientY)\n  {\n    var rect = this.getCanvasBoundingClientRect();\n    return new THREE.Vector3(\n    (clientX + 0.5) / rect.width * 2 - 1,\n    -((clientY + 0.5) / rect.height) * 2 + 1, 1);\n  };\n\n  this.viewportToClient = function (viewportX, viewportY)\n  {\n    var rect = this.getCanvasBoundingClientRect();\n    return new THREE.Vector3(\n    (viewportX + 1) * 0.5 * rect.width - 0.5,\n    (viewportY - 1) * -0.5 * rect.height - 0.5, 0);\n  };\n\n  this.castRay = function (clientX, clientY, ignoreTransparent) {\n    // Use the offsets based on the client rectangle, which is relative to the browser's client\n    // rectangle, unlike offsetLeft and offsetTop, which are relative to a parent element.\n    //\n    return this.castRayViewport(this.clientToViewport(clientX, clientY), ignoreTransparent);\n  };\n\n  // Note: The camera world matrix must be up-to-date\n  this.intersectGroundViewport = function (vpVec) {\n\n    var worldUp = \"z\";\n\n    //In 2D mode, the roll tool can be used to change the orientation\n    //of the sheet, which will also set the world up vector to the new orientation.\n    //However, this is not what we want in case of a 2d sheet -- its ground plane is always Z.\n    //TODO: It's not clear if checking here or in setWorldUp is better. Also I don't see\n    //a way to generalize the math in a way to make it work without such check (e.g. by using camera up only).\n    if (!this.is2d) {\n      worldUp = _worldUpName;\n    }\n\n    var modelBox = this.model && this.model.getBoundingBox();\n    return SceneMath.intersectGroundViewport(vpVec, this.camera, worldUp, modelBox);\n  };\n\n  this.intersectGround = function (clientX, clientY) {\n    return this.intersectGroundViewport(this.clientToViewport(clientX, clientY));\n  };\n\n  this._2dHitTestViewport = function (vpVec, searchRadius, minPixelId) {\n    var _idRes = [0, 0]; // idAtPixels will write the result into this array.\n    var pixelId = _renderer.idAtPixels(vpVec.x, vpVec.y, searchRadius, _idRes);\n    if (pixelId < minPixelId)\n    return null;\n\n    var model = _modelQueue.findModel(_idRes[1]) || this.model;\n    if (!model)\n    return null;\n\n    //Note this function will destructively modify vpVec,\n    //so it's unusable after that.\n    var point = this.intersectGroundViewport(vpVec);\n\n    // get fragment ID if there is a fragment list\n    var fragments = model.getData().fragments;\n    var fragId = fragments ? fragments.dbId2fragId[pixelId] : -1;\n\n    return {\n      intersectPoint: point,\n      dbId: model.remapDbId(pixelId),\n      fragId: fragId,\n      model: model };\n\n  };\n\n  this.hitTestViewport = function (vpVec, ignoreTransparent, dbIds, modelIds, intersections) {\n    var result;\n\n    if (this.is2d) {\n      var searchRadius = isMobileDevice() ? 45 : 5;\n      result = this._2dHitTestViewport(vpVec, searchRadius, 1);\n    } else\n    {\n      result = this.castRayViewport(vpVec, ignoreTransparent, dbIds, modelIds, intersections);\n    }\n\n    return result;\n  };\n\n  this.hitTest = function (clientX, clientY, ignoreTransparent, dbIds, modelIds) {\n\n    return _this.hitTestViewport(this.clientToViewport(clientX, clientY), ignoreTransparent, dbIds, modelIds);\n  };\n\n  this.hitBoxTestViewport = function (vpVec, widthRatio, heightRatio) {\n    var results = [];\n    var ids = [];\n    _renderer.idsAtPixelsBox(vpVec.x, vpVec.y, widthRatio, heightRatio, ids);\n\n    for (var i = 0; i < ids.length; i++) {\n      var model = _modelQueue.findModel(ids[i][1]) || this.model;\n      if (model) {\n        results.push({ dbId: ids[i][0], model: model });\n      }\n    }\n\n    return results;\n  };\n\n  this.snappingHitTestViewport = function (vpVec, ignoreTransparent) {\n    var result;\n\n    if (this.is2d) {\n      if (this.model && this.model.isLeaflet()) {// Assumming that in 2d there's only one model\n        var point = this.intersectGroundViewport(vpVec);\n        result = { intersectPoint: point };\n      } else {\n        //Notice: The amount of pixels per line should correspond to pixelSize in setDetectRadius of Snapper.js,\n        //the shape of detection area is square in idAtPixels, but circle in snapper, should make their areas match roughly.\n        var searchRadius = isMobileDevice() ? 45 : 17;\n        result = this._2dHitTestViewport(vpVec, searchRadius, 0);\n      }\n    } else {// Is 3d\n      var dbId = _renderer.idAtPixel(vpVec.x, vpVec.y);\n      result = this.castRayViewport(vpVec, ignoreTransparent, dbId > 0 ? [dbId] : null);\n    }\n\n    return result;\n  };\n\n  // Used for snapping\n  // firstly, find the intersect object using pre-computed ID buffer\n  // secondly, find the intersect point and face using intersection test\n  this.snappingHitTest = function (clientX, clientY, ignoreTransparent) {\n\n    return this.snappingHitTestViewport(this.clientToViewport(clientX, clientY), ignoreTransparent);\n  };\n\n  /**\n      * Clears the current highlighted object.\n      */\n  this.clearHighlight = function () {\n    _renderer.rolloverObjectId(-1);\n    this.invalidate(false, false, true);\n  };\n\n  this.rollOverIdChanged = function () {\n    this.api.fireEvent({\n      type: et.OBJECT_UNDER_MOUSE_CHANGED,\n      dbId: _renderer.getRollOverDbId(),\n      modelId: _renderer.getRollOverModelId() });\n\n    this.invalidate(false, false, true);\n  };\n\n  //Used for rollover highlighting using pre-computed ID buffer\n  //Currently only the 2D code path can do this.\n  this.rolloverObjectViewport = function (vpVec) {\n\n    //Not supported for 3d.\n    //if (!this.is2d)\n    //    return;\n    if (this.model && (\n    this.model.isLeaflet() ||\n    this.model.isPdf(true) && this.api.prefs.get(Prefs2D.DISABLE_PDF_HIGHLIGHT)))\n\n\n    return;\n\n    // Disable highlight for dbids that have a selection lock.\n    var dbId = _renderer.idAtPixel(vpVec.x, vpVec.y);\n    if (this.selector && this.selector.isNodeSelectionLocked(dbId, this.model)) {\n      this.clearHighlight();\n      return;\n    }\n\n    if (_renderer.rolloverObjectViewport(vpVec.x, vpVec.y))\n    this.rollOverIdChanged();\n  };\n\n  this.rolloverObject = function (clientX, clientY) {\n\n    if (!this.selector.highlightPaused && !this.selector.highlightDisabled)\n    this.rolloverObjectViewport(this.clientToViewport(clientX, clientY));\n  };\n\n  //This method is intended to be used by Tools\n  this.pauseHighlight = function (disable) {\n\n    this.selector.highlightPaused = disable;\n    if (disable) {\n      this.clearHighlight();\n    }\n  };\n\n  this.disableHighlight = function (disable) {\n\n    this.selector.highlightDisabled = disable;\n    if (disable) {\n      this.clearHighlight();\n    }\n  };\n\n  this.disableSelection = function (disable) {\n\n    this.selector.selectionDisabled = disable;\n  };\n\n  // Downloading all the relevant leaflet tiles might take time, so canceling it in the middle should be an option.\n  // Using this API, the screenshot calculation will be canceled.\n  // Note that this function is only for the old getScreenShot function. getScreenShotProgressive() returns a control object for canceling.\n  this.cancelLeafletScreenshot = function () {\n    _this.api.dispatchEvent({ type: et.CANCEL_LEAFLET_SCREENSHOT });\n  };\n\n  // See ScreenShot.js for documentation\n  this.getScreenShotProgressive = function (w, h, onFinished, options) {\n    return ScreenShot.getScreenShot(w, h, onFinished, options, this);\n  };\n\n  //This accessor is only used for debugging purposes a.t.m.\n  this.modelQueue = function () {return _modelQueue;};\n\n  this.glrenderer = function () {return _webglrender;};\n\n  this.renderer = function () {return _renderer;};\n\n  this.setGeomCache = function (geomCache) {\n    _geomCache = geomCache;\n    _geomCache.addViewer(_this.api);\n  };\n\n  this.geomCache = function () {\n    // OtgResourceCache should be generated only when OTG loader starts to request for geometries.\n    // Otherwise, there is a bug related to the web-workers creation time: https://git.autodesk.com/A360/firefly.js/pull/4163.\n    if (!_geomCache) {\n      this.setGeomCache(new OtgResourceCache());\n    }\n\n    return _geomCache;\n  };\n\n  // only for debugging purposes\n  this.shadowMaps = function () {return _shadowMaps;};\n\n  this.worldUp = function () {return _worldUp;};\n  this.worldUpName = function () {return _worldUpName;};\n\n  this.setUserRenderContext = function (ctx, isInitialized) {\n    _renderer = ctx ? ctx : new RenderContext();\n    if (!isInitialized) {\n      _renderer.init(_webglrender, this.canvas.clientWidth, this.canvas.clientHeight);\n      _renderer.setClearColors(this.clearColorTop, this.clearColorBottom);\n    }\n    this.invalidate(true);\n    this.sceneUpdated(false); //to reset world boxes needed by new RenderContext for shadows, etc\n  };\n\n  this.setUserGroundShadow = function (groundShadow) {\n    var replaced = _groundShadow;\n    _groundShadow = groundShadow;\n    return replaced; // Return GroundShadow object that we replaced.\n  };\n\n  this.invalidate = function (needsClear, needsRender, overlayDirty) {\n    _needsClear = needsClear || _needsClear;\n    _needsRender = needsRender || _needsRender;\n    _overlayDirty = overlayDirty || _overlayDirty;\n  };\n\n  // needed for command system\n  this.isOverlayDirty = function () {\n    return _overlayDirty;\n  };\n\n  this.clearOverlayDirtyFlag = function () {\n    _overlayDirty = false;\n  };\n\n  this.sceneUpdated = function (objectsMoved, skipRepaint) {\n\n    this.invalidate(!skipRepaint, false, !skipRepaint);\n\n    // Mark the scene bounds for update\n    if (_modelQueue && objectsMoved) {\n      _modelQueue.invalidateVisibleBounds();\n      this.zoomBoundsChanged = true;\n    }\n\n    _sceneDirty = true;\n\n    invalidateShadowMap();\n  };\n\n  // immediately restart rendering, make it interruptible like progressive, displaying only when done\n  this.requestSilentRender = function () {\n    _deferredSilentRender = _immediateSilentRender = true;\n  };\n\n  // restart rendering only when the previous render is done, make it interruptible like progressive, itself displaying only when done\n  this.requestDeferredSilentRender = function () {\n    _deferredSilentRender = true; // but not immediate\n  };\n\n  this.currentLightPreset = function () {return _currentLightPreset;};\n\n  /**\n                                                                        * @private\n                                                                        */\n  this.saveLightPreset = function () {\n    _oldLightPreset = _currentLightPreset;\n  };\n\n  this.matman = function () {return _materials;};\n\n  this.fps = function () {return 1000.0 / _frameTimeAvg;};\n\n  this.setFPSTargets = function (min, target, max) {\n    MAX_FRAME_BUDGET = 1000 / max;\n    MIN_FRAME_BUDGET = 1;\n    TARGET_FRAME_TIME = 1000 / target;\n    // TODO mismatch! Why / 4 here, and / 2 below (search on targetFrameBudget)?\n    this.targetFrameBudget = isMobileDevice() ? TARGET_FRAME_TIME / 4 : TARGET_FRAME_TIME;\n  };\n\n  //========================================================================\n\n\n  // Record fragments transformation in explode mode for RaaS rendering\n  //this.fragTransformConfig = [];\n\n  this.track = function (event) {\n    logger.track(event);\n  };\n\n  this.worldToClient = function (point) {var camera = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : this.camera;\n    var p = new THREE.Vector4(point.x, point.y, point.z, 1);\n    p.applyMatrix4(camera.matrixWorldInverse);\n    p.applyMatrix4(camera.projectionMatrix);\n\n    // Don't want to mirror values with negative z (behind camera)\n    if (p.w > 0)\n    {\n      p.x /= p.w;\n      p.y /= p.w;\n      p.z /= p.w;\n    }\n\n    return this.viewportToClient(p.x, p.y);\n  };\n\n  this.clientToWorld = function (clientX, clientY, ignoreTransparent, ignore2dModelBounds) {\n\n    var result = null;\n    var model = this.model;\n    var modelData = model.getData();\n\n    if (model.is2d()) {\n\n      var collision = this.intersectGround(clientX, clientY);\n      if (collision) {\n        collision.z = 0;\n        var bbox = modelData.bbox;\n        if (ignore2dModelBounds || modelData.hidePaper || bbox.containsPoint(collision)) {\n          result = {\n            point: collision,\n            model: model };\n\n        }\n      }\n    } else {\n\n      // hitTest handles multiple scenes\n      result = this.hitTest(clientX, clientY, ignoreTransparent);\n      if (result) {\n        result.point = result.intersectPoint; // API expects attribute point to have the return value too.\n      }\n    }\n\n    return result;\n  };\n\n  /**\n      * Sets selection highlight color and opacity for 2D models\n      * @param {THREE.Color} color\n      * @param {number} opacity\n      */\n  this.set2dSelectionColor = function (color, opacity) {\n    this.matman().set2dSelectionColor(color, opacity);\n    this.invalidate(false, false, true /* overlay */);\n  };\n\n  /**\n      * Sets selection highlight color for 3D models\n      * @param {THREE.Color} color\n      * @param {number} selectionType\n      */\n  this.setSelectionColor = function (color, selectionType) {\n    selectionType = selectionType || SelectionType.MIXED;\n    var emissive = new THREE.Color(color);\n    emissive.multiplyScalar(0.5);\n\n    var setColors = function setColors(material) {\n      material.color.set(color);\n      material.emissive.set(emissive);\n      material.variants && material.variants.forEach(setColors);\n    };\n\n    switch (selectionType) {\n      default:\n      case SelectionType.MIXED:\n        setColors(this.selectionMaterialBase);\n        setColors(this.selectionMaterialTop);\n        _renderer.setSelectionColor(color);\n        setColors(this.highlightMaterial);\n        this.invalidate(true);\n        break;\n      case SelectionType.REGULAR:\n        setColors(this.highlightMaterial);\n        this.invalidate(true);\n        break;\n      case SelectionType.OVERLAYED:\n        setColors(this.selectionMaterialBase);\n        setColors(this.selectionMaterialTop);\n        _renderer.setSelectionColor(color);\n        this.invalidate(false, false, true);\n        break;}\n\n  };\n\n  // Update the viewport Id for the first selection in 2d measure\n  this.updateViewportId = function (vpId) {\n    _materials.updateViewportId(vpId);\n    this.invalidate(true);\n  };\n\n  /**\n      * Find model based on modelId, BubbleNode, or filter function.\n      *  @param {number|av.BubbleNode|function(av.Model)} value\n      *  @param {bool} [includeHidden] - By default, we only consider visible models for search\n      *  @returns {RenderModel|null}\n      */\n  this.findModel = function (value, includeHidden) {\n\n    // define filter function\n    var filter;\n    if (typeof value == 'number') filter = function filter(m) {return m.id == value;};else\n    if (value instanceof BubbleNode) filter = function filter(m) {return m.getDocumentNode() == value;};else\n    filter = value; // value must be a filter function already\n\n    // Search visible models\n    var model = _modelQueue.getModels().find(filter);\n\n    // Optional: Search hidden models\n    if (includeHidden && !model) {\n      model = _modelQueue.getHiddenModels().find(filter);\n    }\n\n    return model;\n  };\n\n  /**\n      *  get frame rate for progressive rendering, i.e, how many ticks go by before an update occurs\n      *  @returns {number}\n      */\n  this.getFrameRate = function () {\n    return this.frameDisplayRate;\n  };\n\n  /**\n      * set frame rate for progressive rendering, i.e, how many ticks go by before an update occurs\n      *  @param   {number} rate\n      */\n  this.setFrameRate = function (rate) {\n    // don't let rate < 1, just in case user sets 0.\n    this.frameDisplayRate = rate < 1 ? 1 : rate;\n  };\n\n  /**\n      *  For shadow casting, we assume a single directional light. Shadow light direction is the direction\n      *  that this light comes from, i.e., shadows are casted to the opposite direction.\n      *  This function changes the direction and triggers a shadow update.\n      *\n      *  Note that the directional light source is only assumed for shadow casting. The actual lighting usually comes from\n      *  several directions when using environment lighting, but we need a fixed direction for shadow mapping.\n      *\n      *   @param {THREE.Vector3} lightDir - direction in world space\n      */\n  this.setShadowLightDirection = function (lightDir) {\n    _shadowLightDir.copy(lightDir);\n    invalidateShadowMap();\n    this.invalidate(true, false, false);\n\n    // update ground transform to make sure that the ground shape is large enough\n    // to make the whole shadow visible.\n    updateGroundTransform();\n  };\n\n  /**\n      *  The result is either returned as a new vector or written to 'target' (if specified)\n      *  @param {THREE.Vector3} [target]\n      *  @returns {THREE.Vector3} Either target object or new Vector3 instance.\n      */\n  this.getShadowLightDirection = function (target) {\n    var dir = target ? target : new THREE.Vector3();\n    dir.copy(_shadowLightDir);\n    return dir;\n  };\n\n  /**\n      * @param {Bool} enable\n      * Note that viewer must be initialized first.\n      */\n  this.toggleShadows = function (enable) {\n    if (!!_shadowMaps == !!enable) {\n      // no change\n      return;\n    }\n\n    if (enable) {\n      _shadowMaps = new shadow.ShadowMaps(_webglrender);\n    } else {\n      _shadowMaps.cleanup(_materials);\n      _shadowMaps = null;\n    }\n\n    // Adjust ground plane box if the shadows are getting turned on.\n    updateGroundTransform();\n\n    this.invalidate(true, true, false);\n  };\n\n  this.showTransparencyWhenMoving = function (enabled) {\n    _modelQueue.enableNonResumableFrames = enabled;\n  };\n\n\n  this.fitToView = function (aggregateSelection, immediate) {\n\n    immediate = !!immediate;\n    if (aggregateSelection.length === 0) {\n      // If the array is empty, assume that we want\n      // all models and no selection\n      var allModels = _modelQueue.getModels();\n      aggregateSelection = allModels.map(function (model) {\n        return {\n          model: model,\n          selection: [] };\n\n      });\n    }\n\n    // Early exit if parameters are not right\n    var count2d = 0;\n    var count3d = 0;\n    for (var i = 0; i < aggregateSelection.length; ++i) {\n\n      var model = aggregateSelection[i].model;\n      if (!model)\n      return false;\n\n      if (model.is2d()) {\n        count2d++;\n      } else {\n        count3d++;\n      }\n    }\n\n    // Start processing.\n    var processed = false;\n    if (count2d === aggregateSelection.length) {\n      // Aggregate selection on 2d models.\n      processed = this._fitToView2d(aggregateSelection, immediate);\n    } else {\n      // Aggregate selection on 3d models or 2d/3d hybrid.\n      processed = this._fitToView3d(aggregateSelection, immediate);\n    }\n\n    if (!processed)\n    return false;\n\n    if (_modelQueue.getModels().length === 1) {\n      // Single Model (backwards compatibility)\n      this.api.dispatchEvent({\n        type: et.FIT_TO_VIEW_EVENT,\n        nodeIdArray: aggregateSelection[0].selection,\n        immediate: immediate,\n        model: aggregateSelection[0].model });\n\n    }\n\n    // Dispatches in both single and multi-model context\n    this.api.dispatchEvent({\n      type: et.AGGREGATE_FIT_TO_VIEW_EVENT,\n      selection: aggregateSelection,\n      immediate: immediate });\n\n\n    return true;\n  };\n\n  /**\n      * Used internally only by Viewer3DImpl::fitToView()\n      * For now, only support a single 2D model.\n      * @private\n      */\n  this._fitToView2d = function (aggregateSelection, immediate) {\n\n    if (aggregateSelection.length > 1) {\n      logger.warn('fitToView() doesn\\'t support multiple 2D models. Using the first one...');\n    }\n\n    // Selection\n    var model = aggregateSelection[0].model;\n    var selection = aggregateSelection[0].selection;\n\n    // Helpers\n    var bounds = new THREE.Box3();\n    var bc = new BoundsCallback(bounds);\n\n    if (!selection || selection.length === 0) {\n      if (this.api.anyLayerHidden()) {\n\n        // Fit only to the visible layers\n        var frags = model.getData().fragments;\n        var visibleLayerIndices = this.getVisibleLayerIndices();\n        for (var i = 0; i < frags.length; i++) {\n          find2DLayerBounds(model, i, visibleLayerIndices, bc);\n        }\n\n      } else {\n        // Fit to the whole page\n        bounds = this.getFitBounds(true);\n      }\n    } else\n\n    {\n      this.computeSelectionBounds(selection, model, bc);\n    }\n\n\n    if (!bounds.empty()) {\n      this.api.navigation.fitBounds(immediate, bounds);\n      return true;\n    }\n\n    // Unhandled 2D\n    return false;\n  };\n\n  /**\n      * Compute the 2d bounds of selected object.\n      * @public\n      * @param {Array} selection array of object's ids\n      * @param {RenderModel} model\n      * @param {BoundsCallback} bc\n      */\n  this.computeSelectionBounds = function (dbIds, model, bc) {\n\n    if (!bc) {\n      var bounds = new THREE.Box3();\n      var bc = new BoundsCallback(bounds);\n    }\n\n    var dbId2fragId = model.getData().fragments.dbId2fragId;\n\n    for (var i = 0; i < dbIds.length; i++) {\n      var remappedId = model.reverseMapDbId(dbIds[i]);\n      var fragIds = dbId2fragId[remappedId];\n      // fragId is either a single vertex buffer or an array of vertex buffers\n      if (Array.isArray(fragIds)) {\n        for (var j = 0; j < fragIds.length; j++) {\n          // go through each vertex buffer, looking for the object id\n          find2DBounds(model, fragIds[j], remappedId, bc);\n        }\n      } else if (typeof fragIds === 'number') {\n        // go through the specific vertex buffer, looking for the object id\n        find2DBounds(model, fragIds, remappedId, bc);\n      }\n    }\n\n    return bc.bounds;\n  };\n\n  /**\n     * Used internally only by Viewer3DImpl::get3DBounds()\n     * Support multiple 3D models.\n     * @private\n     */\n  this.get3DBounds = function (aggregateSelection) {\n\n    // First, check if there's anything selected.\n    var bNodeSelection = false;\n    for (var j = 0; j < aggregateSelection.length; ++j) {\n      if (aggregateSelection[j].selection.length > 0) {\n        bNodeSelection = true;\n        break;\n      }\n    }\n\n    var bounds = new THREE.Box3();\n    var box = new THREE.Box3();\n\n    if (!bNodeSelection) {\n      // When there is no node selection, then we need to fit to the whole model(s)\n      bounds.union(this.getVisibleBounds(false, false));\n    } else {\n\n      // Fit to selected elements only\n      for (var i = 0; i < aggregateSelection.length; ++i) {\n\n        var selection = aggregateSelection[i].selection;\n        if (selection.length === 0)\n        continue;\n\n        // Specific nodes\n        var model = aggregateSelection[i].model;\n        var instanceTree = model.getInstanceTree();\n        var fragList = model.getFragmentList();\n\n        // instanceTree may be null, e.g., if instanceTree is not loaded yet\n        if (!instanceTree) {\n          continue;\n        }\n\n        for (var s = 0; s < selection.length; ++s) {\n          var dbId = parseInt(selection[s]);\n          instanceTree.enumNodeFragments(dbId, function (fragId) {\n            fragList.getWorldBounds(fragId, box);\n            bounds.union(box);\n          }, true);\n        }\n      }\n\n    }\n\n    return bounds;\n  };\n\n  // Must be triggered if the transform of a model has changed while viewing it. \n  this.onModelTransformChanged = function (model) {\n\n    // Needed in order to invalidate scene and shadow map.\n    this.sceneUpdated();\n\n    // The code below is only needed for selection proxies of consolidated meshes\n    if (model.isConsolidated()) {\n      // Invalidate affected selection proxies, so that they are updated on next overlay render\n      for (var id in _this.selectionMeshes) {\n        var proxy = _this.selectionMeshes[id];\n        if (proxy.model === model) {\n          proxy.needsUpdate = true;\n        }\n      }\n    }\n\n    this.invalidate(true, true, true);\n\n    this.api.fireEvent({ type: et.MODEL_TRANSFORM_CHANGED_EVENT, model: model, matrix: model.getModelTransform() });\n  };\n\n  /**\n      * Change the placement matrix of the model. This overrides the placement transform applied at loadTime.\n      *  @param {LmvMatrix4} matrix         - Note that you need 64-Bit precision for large values.\n      *  @param {Vector3}    [globalOffset] - Optionally, the globalOffset can be reset in the same step.\n      */\n  this.setPlacementTransform = function (model, matrix) {\n    model.setPlacementTransform(matrix);\n\n    this.api.fireEvent({ type: et.MODEL_PLACEMENT_CHANGED_EVENT, model: model, matrix: model.getPlacementTransform() });\n\n    this.onModelTransformChanged(model);\n  };\n\n  /**\n      * Used internally only by Viewer3DImpl::fitToView()\n      * Support multiple 3D models.\n      * @private\n      */\n  this._fitToView3d = function (aggregateSelection, immediate) {\n\n    var bounds = this.get3DBounds(aggregateSelection);\n\n    if (!bounds.empty()) {\n      this.api.navigation.fitBounds(immediate, bounds);\n      return true;\n    }\n\n    // Unhandled 3D\n    return false;\n  };\n\n  /**\n      * Supports Fit-To-View for 2D models\n      * @private\n      */\n  function find2DLayerBounds(model, fragId, visibleLayerIds, bc)\n  {\n    var mesh = model.getFragmentList().getVizmesh(fragId);\n    var vbr = new VertexBufferReader(mesh.geometry);\n    vbr.enumGeomsForVisibleLayer(visibleLayerIds, bc);\n  }\n\n  /**\n     * Supports Fit-To-View for 2D models\n     * @private\n     */\n  function find2DBounds(model, fragId, dbId, bc)\n  {\n    var mesh = model.getFragmentList().getVizmesh(fragId);\n    var vbr = new VertexBufferReader(mesh.geometry);\n    vbr.enumGeomsForObject(dbId, bc);\n  }\n\n  /**\n     * Invoked when WebGL loses the rendering context.\n     * Only happens during an unrecoverable error.\n     */\n  this.onWebGLcontextLost = function (event) {\n    this.api.fireEvent({ type: et.WEBGL_CONTEXT_LOST_EVENT });\n  };\n\n  /** @returns {bool} Check if the model is in the array of visible ones */\n  this.modelVisible = function (modelId) {\n    var model = _modelQueue.findModel(modelId);\n    return !!model;\n  };\n\n  /**\n      * Set initial visibility state of nodes\n      * This ensures the UI (Model Browser) matches the main display\n      * @private\n      */\n  this.handleInitialVisibility = function (model) {\n    var viewer = this.api;\n\n    // If the model is just loaded, but not shown, selector is null and this\n    // function would crash.\n    // Todo: The whole initialVisibility handling needs some major revision in order to properly\n    //       work - particularly for aggregated viewing scenarios:\n    //        - It doesn't work if a model was toggled off (in an AggregatedView) before the geometry-load was finished.\n    //        - It doesn't work if models are just loaded without showing (e.g. diff support models)\n    //        - Whether it's applied or not depends on whether a model was in cache or not. Actually, the application\n    //          should control it, so that it is applied on an actual view switch, but not when toggling visibility of a model on/off.\n    //        - Since it is triggered after geometry loading, but assumes that the model visibility is untouched so far.\n    //          But: Since geomLoadDone() may happen much later than model-root load, user or client code may already have modified visibility.\n    //          So, handleInitialVisiblity() overwrites this and there is a race condition.\n    if (!model.visibilityManager) {\n      return;\n    }\n\n    function hideInvisibleNodes(instanceTree) {\n      // a node is visible if any of its fragments are\n      // the LMVTK propagates visibility downwards, and doesn't allow the\n      // visibility to be set for fragments directly, so we can infer the visibility\n      // of the geometry node\n\n      var frags = model.getFragmentList();\n      if (frags.areAllVisible()) {\n        return;\n      }\n\n      var invisibleNodes = [];\n\n      if (!instanceTree) {\n        return;\n      }\n\n      instanceTree.enumNodeChildren(model.getRootId(), function (dbId) {\n        var visible = instanceTree.enumNodeFragments(dbId, function (fragId) {\n          return frags.isFragVisible(fragId);\n        }, true);\n        if (!visible && !instanceTree.isNodeHidden(dbId) && !instanceTree.isNodeOff(dbId)) {\n          invisibleNodes.push(dbId);\n        }\n      }, true);\n\n      if (invisibleNodes.length) {\n        viewer.hide(invisibleNodes, model);\n      }\n    }\n\n    model.getObjectTree(hideInvisibleNodes);\n  };\n\n  /**\n      * Changes the paper visibility for a 2D sheet\n      * @param {Autodesk.Viewing.Model} model - the 2D sheet\n      * @param {boolean} show\n      * @param {boolean} [withTransition] - whether to use optional fading animation\n      * @param {function} [onTransitionFinished] - optional callback\n      * @param {number} [transitionDuration] - in seconds\n      */\n  this.changePaperVisibility = function (model, show) {var _this5 = this;var withTransition = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;var onTransitionFinished = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : null;var transitionDuration = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : 1;\n    if (model.is3d()) {\n      return;\n    }\n\n    if (model.paperVisibilityAnim) {\n      model.paperVisibilityAnim.stop();\n      model.paperVisibilityAnim = null;\n    }\n\n    if (!withTransition) {\n      model.changePaperVisibility(show);\n      this.invalidate(true);\n      return;\n    }\n\n    var frags = model.getFragmentList();\n    var paperDbId = -1;\n    var start = frags.dbIdOpacity[paperDbId] !== undefined ?\n    frags.dbIdOpacity[paperDbId] :\n    show ? 0 : 1;\n    var end = show ? 1 : 0;\n    var duration = transitionDuration; // seconds\n    var onTimer = function onTimer(t) {\n      t = Autodesk.Viewing.Private.smootherStep(t);\n      frags.setObject2DOpacity(paperDbId, t);\n      _this5.invalidate(true);\n    };\n    var onFinished = function onFinished() {\n      model.paperVisibilityAnim = null;\n      if (onTransitionFinished) {\n        onTransitionFinished();\n      }\n    };\n\n    model.paperVisibilityAnim = Autodesk.Viewing.Private.fadeValue(start, end, duration, onTimer, onFinished);\n  };\n\n  /**\n      * Used by Loaders to indicate that the model loading process has began \n      * and no geometry is available yet.\n      * Works only when there are no models in the scene.\n     */\n  this._signalNoMeshes = function () {\n    if (_modelQueue.isEmpty()) {\n      this._geometryAvailable = 0;\n    }\n  };\n\n  /**\n      * Fires an event signaling that model data is available for rendering.\n      * Called repeatedly whenever new geometry data is available for rendering, \n      * but only a single event will get fired. \n      */\n  this._signalMeshAvailable = function () {\n    if (this._geometryAvailable === 0) {\n      this._geometryAvailable = 1;\n      this.api.fireEvent({ type: et.RENDER_FIRST_PIXEL });\n    }\n  };\n\n  /**\n      * Whether any models have been loaded already.\n      * A model is considered loaded as soon as the Model instance has\n      * been added to RenderScene.\n      */\n  this.hasModels = function () {\n    return !_modelQueue.isEmpty();\n  };\n\n  // Update loadingAnimationDuration according to preferences.\n  this.onLoadingAnimationChanged = function (value) {\n    _webglrender.setLoadingAnimationDuration(value ? this.defaultLoadingAnimationDuration : -1);\n    this.invalidate(false, true, false);\n  };\n\n  this.isLoadingAnimationEnabled = function () {\n    return this.api.prefs.get(Prefs2D.LOADING_ANIMATION) && (!this.model || this.model.is2d());\n  };\n\n  // Optional: Exclude all models from near/farPlane computation whose camera distance is beyond the given threshold. \n  // This avoids rendering artifacts for aggregated views that contain models with broken georeferencing, so that they\n  // are too far away to be rendered properly together with closer content.\n  // Note: Make sure that the value is not too small, because this also puts a general limit on the zoom-out distance.\n  this.setMaxModelDistance = function () {var maxDist = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 1e+5;\n    this.maxModelDistance = maxDist;\n  };\n}\n\nViewer3DImpl.prototype.constructor = Viewer3DImpl;\nGlobalManagerMixin.call(Viewer3DImpl.prototype);","function _typeof(obj) {\"@babel/helpers - typeof\";if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {_typeof = function _typeof(obj) {return typeof obj;};} else {_typeof = function _typeof(obj) {return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;};}return _typeof(obj);}\n\nimport { logger } from \"../logger/Logger\";\nimport { LightPresets } from \"./LightPresets\";\nimport { SceneMath } from \"../wgs/scene/SceneMath\";\n\n/**\n                                                     * Class for creating and restoring viewer states.\n                                                     *\n                                                     * Main interactions come from methods\n                                                     * - {@link Autodesk.Viewing.Private.ViewerState#getState}\n                                                     * - {@link Autodesk.Viewing.Private.ViewerState#restoreState}\n                                                     * @tutorial viewer_state\n                                                     * @param {Autodesk.Viewing.Viewer3D} viewer - Viewer instance used to operate on.\n                                                     * @private\n                                                     */\nexport function ViewerState(viewer)\n{\n  /**\n   * All-inclusive filter constant used when no filter is provided.\n   * @type {boolean}\n   * @private\n   */\n  var FILTER_ALL = true;\n\n\n  function removeUnneededCutplanes(viewerState, planes) {\n    var supportsLevels = !!viewer.getExtension('Autodesk.AEC.LevelsExtension');\n    if (supportsLevels && viewerState.floorGuid === undefined) {\n      // Legacy fallback for old serialized viewer states.\n      // TODO: Added on February 2019. Can be removed after a while when we can assume that all issues are serialized with new serialization.\n      //\n      // Previously the cutplanes were saved as is, together with the section cutplanes.\n      // This created problems when restoring a state because there was no way to differentiate among\n      // the different sets. Instead of saving the planes we now save the floor guid, but for states\n      // that were saved between the time the levels extension was introduced, and when the floorGuid\n      // attribute was added to the state, we need to remove the extraneous planes from the __set_view set.\n      // Heuristic:\n      // Remove from __set_view if exists, and there are 3 or 8 cutplanes, and the last two have the shape of \n      // [new THREE.Vector4(0,0,-1,zMin), new THREE.Vector4(0,0,1,-zMax)].\n      // Reasoning: Revit files (the only type that support levels) can have only 1 or 6 planes, from the Section\n      // extension, so the extra 2 probably come from the level extension. We check the shape to be sure.\n      var length = planes.length;\n      if (length === 3 || length === 8) {\n        var beforeLast = planes[length - 2];\n        var last = planes[length - 1];\n        if (beforeLast.x === 0 && beforeLast.y === 0 && beforeLast.z === -1 &&\n        last.x === 0 && last.y === 0 && last.z === 1) {\n          planes.splice(-2, 2); // Remove last 2 elements\n        }\n      }\n    }\n  }\n\n  /**\n     * Get a model object (that is visible) from the passed-in seedUrn.\n     * \n     * @returns {Autodesk.Viewing.Model} - Model that is associated with the seedUrn.\n     * @private\n     */\n  this.getVisibleModel = function (seedUrn) {\n    var visibleModels = viewer.getVisibleModels();\n    for (var i = 0; i < visibleModels.length; ++i) {\n      var model = visibleModels[i];\n      if (this.getSeedUrn(model) === seedUrn) {\n        return model;\n      }\n    }\n  };\n\n  /**\n      * Creates an array of objectSets associated to each model. It assigns the array to `viewerState.objectSet`.\n      * @param {object} viewerState\n      * @private \n      */\n  this.createObjectSets = function (viewerState) {\n    // Object set, contains selection, isolation and explode value.\n    var objectSet = viewerState['objectSet'];\n    if (!Array.isArray(objectSet)) {\n      viewerState['objectSet'] = objectSet = [];\n    }\n\n    var visibleModels = viewer.getVisibleModels();\n    for (var i = 0; i < visibleModels.length; i++) {\n      var model = visibleModels[i];\n      var seedUrn = this.getSeedUrn(model);\n      var selectedNodes = this.getSelectedNodes(model);\n\n      objectSet[i] = {\n        id: selectedNodes, // Works for 2d and 3d\n        idType: 'lmv' };\n\n\n      if (visibleModels.length > 1) {\n        objectSet[i].seedUrn = seedUrn;\n      }\n\n      // Spec call for these elements to grouped in an Object at an Array's index 0.\n      // 3d models attributes\n      if (!model.is2d()) {\n        objectSet[i].isolated = viewer.getIsolatedNodes(model);\n        objectSet[i].hidden = viewer.getHiddenNodes(model);\n        objectSet[i].explodeScale = viewer.getExplodeScale();\n      } else {\n        // 2d models attributes\n        objectSet[i].isolated = this.getVisibleLayers2d(model);\n        objectSet[i].allLayers = this.areAllLayersVisible(model);\n        objectSet[i].hidden = []; // There's no hide feature for 2d.\n      }\n    }\n  };\n\n  /**\n      * Returns a viewer state Object for the current viewer instance.\n      *\n      * @param {object} [filter] - Object with a structure similar to the output where\n      * values are replaced with Booleans true/false indicating whether they should be stored or not.\n      * @returns {object} Plain object describing the state of the viewer.\n      * @tutorial viewer_state\n      */\n  this.getState = function (filter) {\n\n    var nav = viewer.navigation;\n    var viewerState = {};\n\n    // Adding level-0 properties\n    viewerState[\"seedURN\"] = this.getSeedUrn();\n\n    // Create an objectSet for each model.\n    this.createObjectSets(viewerState);\n\n    // Viewport\n    var viewport = viewerState[\"viewport\"];\n    if (!viewport) {\n      viewport = viewerState[\"viewport\"] = {};\n    }\n\n    var bPerspectiveCam = nav.getCamera().isPerspective;\n    viewport[\"name\"] = \"\"; // TODO: Populate accordingly; Requested by the mobile team.\n    viewport[\"eye\"] = nav.getPosition().toArray();\n    viewport[\"target\"] = nav.getTarget().toArray();\n    viewport[\"up\"] = nav.getCameraUpVector().toArray();\n    viewport[\"worldUpVector\"] = nav.getWorldUpVector().toArray();\n    viewport[\"pivotPoint\"] = nav.getPivotPoint().toArray();\n    viewport[\"distanceToOrbit\"] = nav.getPivotPlaneDistance();\n    viewport[\"aspectRatio\"] = this.getAspectRatio();\n    viewport[\"projection\"] = bPerspectiveCam ? \"perspective\" : \"orthographic\";\n    viewport[\"isOrthographic\"] = !bPerspectiveCam;\n    if (bPerspectiveCam) {\n      viewport[\"fieldOfView\"] = nav.getVerticalFov();\n    } else {\n      viewport[\"orthographicHeight\"] = this.getOrthographicHeight();\n    }\n\n\n    // Render Options\n    var renderOptions = viewerState[\"renderOptions\"];\n    if (!renderOptions) {\n      renderOptions = viewerState[\"renderOptions\"] = {};\n    }\n    renderOptions[\"environment\"] = this.getEnvironmentName();\n    renderOptions[\"ambientOcclusion\"] = {\n      enabled: viewer.impl.renderer().getAOEnabled(),\n      radius: viewer.impl.renderer().getAORadius(),\n      intensity: viewer.impl.renderer().getAOIntensity() };\n\n    renderOptions[\"toneMap\"] = {\n      method: viewer.impl.renderer().getToneMapMethod(),\n      exposure: viewer.impl.renderer().getExposureBias(),\n      lightMultiplier: this.getToneMapIntensity() };\n\n    renderOptions[\"appearance\"] = {\n      ghostHidden: viewer.impl.showGhosting,\n      ambientShadow: viewer.prefs.ambientShadows,\n      antiAliasing: viewer.impl.renderer().settings.antialias,\n      progressiveDisplay: viewer.prefs.progressiveRendering,\n      swapBlackAndWhite: viewer.prefs.swapBlackAndWhite,\n      displayLines: viewer.prefs.lineRendering,\n      displayPoints: viewer.prefs.pointRendering };\n\n\n    // Cutplanes (aka: Sectioning) are a 3d-only feature.\n    if (viewer.model && !viewer.model.is2d()) {\n      var cutplanes = viewerState.cutplanes = [];\n      var planes = viewer.impl.getCutPlaneSet('__set_view');\n      for (var i = 0; i < planes.length; i++) {\n        cutplanes.push(planes[i].toArray());\n      }\n    }\n\n    // Allow extensions to inject their state data\n    for (var extensionName in viewer.loadedExtensions) {\n      var extension = viewer.loadedExtensions[extensionName];\n      extension.getState && extension.getState(viewerState);\n    }\n\n    // Filter out values the user doesn't want to consume before returning.\n    if (filter && filter !== FILTER_ALL) {\n      this.applyFilter(viewerState, filter);\n    }\n    return viewerState;\n  };\n\n  /**\n      * Restores all of the object sets. Sets the state of each model (selected, hidden, isolated nodes).\n      * @param {object} viewerState - see viewerState.getState()\n      * @private\n      */\n  this.restoreObjectSet = function (viewerState) {\n    var objectSets = viewerState.objectSet;\n    if (!Array.isArray(objectSets) || objectSets.length === 0) {\n      return;\n    }\n    var isolateAggregate = [];\n    var hideAggregate = [];\n    var selectAggregate = [];\n    // Legacy-fallback\n    var model = viewer.model;\n    for (var i = 0; i < objectSets.length; ++i) {\n      var objectSet = objectSets[i];\n\n      // Ensure that the objectSet was generated by the getState function\n      if (objectSet.idType !== \"lmv\") {\n        continue;\n      }\n      var seedUrn = objectSet.seedUrn;\n      if (seedUrn) {\n        model = this.getVisibleModel(seedUrn);\n        // the model is not loaded \n        if (!model) continue;\n      }\n\n      // Selection (2d and 3d)\n      var selectionIds = objectSet.id;\n      if (selectionIds) {\n        selectionIds = this.toIntArray(selectionIds);\n        selectAggregate.push({ model: model, ids: selectionIds });\n      }\n\n\n      // Isolation / Hidden depends on whether it is 2d or 3d\n      if (model.is2d()) {\n        // TODO: aggregate layers are not yet supported.\n        // 2d Isolation is Layer visibility\n        var visibleLayers = objectSet.isolated;\n        if (Array.isArray(visibleLayers) && visibleLayers.length > 0) {\n          // Only certain layers are visible\n          viewer.setLayerVisible(null, false); // start by hiding all\n\n          // Make sure layers integer-types\n          for (var k = 0; k < visibleLayers.length; ++k) {\n            visibleLayers[k] = parseInt(visibleLayers[k]);\n          }\n          viewer.impl.setLayerVisible(visibleLayers, true);\n        } else if (!objectSet.allLayers) {\n          // If there are no isolated ids, that means that all of the layers should be invisible.\n          // Reported in LMV-3537\n          viewer.setLayerVisible(null, false);\n        }\n      } else {\n        // 3d Isolation\n        var isolatedIds = objectSet.isolated || [];\n        var hiddenIds = objectSet.hidden || [];\n\n        isolatedIds = this.toIntArray(isolatedIds);\n        isolateAggregate.push({ model: model, ids: isolatedIds });\n\n        if (isolatedIds.length === 0 && hiddenIds.length > 0) {\n          hiddenIds = this.toIntArray(hiddenIds);\n          // get the hidden ids and push them to the hiddenAggregate array.\n          hideAggregate.push({ model: model, ids: hiddenIds });\n        }\n      }\n\n      // Explode scale (3d)\n      if (\"explodeScale\" in objectSet) {\n        var explodeScale = parseFloat(objectSet.explodeScale);\n        if (viewer.explode) {\n          viewer.explode(explodeScale);\n        }\n      }\n    }\n\n    if (selectAggregate.length > 0) {\n      viewer.impl.selector.setAggregateSelection(selectAggregate);\n    }\n\n    if (isolateAggregate.length > 0) {\n      viewer.impl.visibilityManager.aggregateIsolate(isolateAggregate, { hideLoadedModels: false });\n    }\n\n    if (hideAggregate.length > 0) {\n      viewer.impl.visibilityManager.aggregateHide(hideAggregate);\n    }\n  };\n\n\n  /**\n      * Restores the associated viewer instance with the provided viewerState object.\n      *\n      * @param {object} viewerState\n      * @param {object} [filter] - Similar in structure to viewerState used to filter out values\n      * that should not be restored.\n      * @param {boolean} [immediate] - Whether the state should be apply with (false)\n      * or without (true) a smooth transition.\n      * @returns {boolean} True if the operation was successful.\n      * @tutorial viewer_state\n      */\n  this.restoreState = function (viewerState, filter, immediate) {\n\n    if (!viewerState) {\n      logger.warn(\"restoreState has no viewer state to restore from.\");\n      return false;\n    }\n\n    if (!viewer || !viewer.model) {\n      logger.warn(\"restoreState has no viewer or model to restore.\");\n      return false;\n    }\n\n    if (filter && filter !== FILTER_ALL) {\n      // To avoid modifying viewerState passed in, we create a clone of it\n      viewerState = JSON.parse(JSON.stringify(viewerState));\n      this.applyFilter(viewerState, filter);\n    }\n\n    var nav = viewer.navigation;\n    var isModel2d = viewer.model.is2d();\n    var isModel3d = !isModel2d;\n\n    // Objectset\n    this.restoreObjectSet(viewerState);\n\n    var viewport = viewerState.viewport;\n    if (viewport) {\n\n      var eye = this.getVector3FromArray(viewport.eye, nav.getPosition());\n      var up = this.getVector3FromArray(viewport.up, nav.getCameraUpVector());\n      var target = this.getVector3FromArray(viewport.target, nav.getTarget());\n      var fov = \"fieldOfView\" in viewport ? parseFloat(viewport.fieldOfView) : nav.getVerticalFov();\n      var worldUp = this.getVector3FromArray(viewport.worldUpVector, null);\n      if (!worldUp) {\n        var upVectorArray = viewer.model ? viewer.model.getUpVector() : null;\n        if (upVectorArray) {\n          worldUp = new THREE.Vector3().fromArray(upVectorArray);\n        } else {\n          worldUp = new THREE.Vector3(0, 1, 0); // TODO: Can we do better? Is it worth it?\n        }\n      }\n      var pivot = this.getVector3FromArray(viewport.pivotPoint, nav.getPivotPoint());\n\n      // Retain current values if not available in restore object\n      var isPerspective = nav.getCamera().isPerspective;\n      if ('isOrthographic' in viewport) {\n        isPerspective = !viewport.isOrthographic;\n      }\n      var orthoScale = this.getOrthographicHeight();\n      if ('orthographicHeight' in viewport) {\n        orthoScale = Number(viewport.orthographicHeight);\n      }\n\n      var camera = {\n        position: eye,\n        target: target,\n        up: up,\n        worldup: worldUp,\n        aspect: viewer.impl.camera.aspect,\n        fov: fov,\n        orthoScale: orthoScale,\n        isPerspective: isPerspective,\n        pivot: pivot };\n\n\n      this.restoreCameraState(camera, immediate);\n    }\n\n\n    // Render option state\n    var renderOptions = viewerState.renderOptions;\n    if (renderOptions) {\n\n      // current values\n      var renderer = viewer.impl.renderer();\n      var prefs = viewer.prefs;\n      var saoEnabled = prefs.ambientShadows;\n      var antiAliasing = prefs.antialiasing;\n\n      var sao = renderOptions.ambientOcclusion;\n      if (sao) {\n        if (\"enabled\" in sao) {\n          saoEnabled = sao.enabled;\n        }\n        var saoRadius = \"radius\" in sao ? sao.radius : null;\n        var saoIntensity = \"intensity\" in sao ? sao.intensity : null;\n        if (saoRadius !== null && saoIntensity !== null) {\n          if (saoRadius !== renderer.getAORadius() ||\n          saoIntensity !== renderer.getAOIntensity()) {\n            renderer.setAOOptions(saoRadius, saoIntensity);\n            renderer.composeFinalFrame();\n          }\n        }\n      }\n\n      if (\"environment\" in renderOptions) {\n        var lightPresetIndex = this.getLightPresetIndex(renderOptions.environment);\n        if (lightPresetIndex !== -1 && lightPresetIndex !== prefs.get('lightPreset') && isModel3d) {\n          viewer.setLightPreset(lightPresetIndex);\n        }\n      }\n\n      // ToneMap values are overrides to the environment settings.\n      var toneMap = renderOptions.toneMap;\n      if (toneMap) {\n        var invalidate = false;\n        var exposure = \"exposure\" in toneMap ? toneMap.exposure : null;\n        var toneMapIntensity = \"lightMultiplier\" in toneMap ? toneMap.lightMultiplier : null;\n\n        if (exposure !== null && exposure !== renderer.getExposureBias()) {\n          renderer.setTonemapExposureBias(exposure);\n          invalidate = true;\n        }\n\n        if (toneMapIntensity !== null && viewer.impl.dir_light1 && toneMapIntensity !== this.getToneMapIntensity()) {\n          viewer.impl.dir_light1.intensity = Math.pow(2.0, toneMapIntensity);\n          invalidate = true;\n        }\n\n        if (invalidate) {\n          viewer.impl.invalidate(true);\n        }\n      }\n\n      var appearance = renderOptions.appearance;\n      if (appearance) {\n        if (\"antiAliasing\" in appearance) {\n          antiAliasing = appearance.antiAliasing;\n        }\n        if (\"progressiveDisplay\" in appearance && appearance.progressiveDisplay !== prefs.get('progressiveRendering')) {\n          viewer.setProgressiveRendering(appearance.progressiveDisplay);\n        }\n        if (\"swapBlackAndWhite\" in appearance && appearance.swapBlackAndWhite !== prefs.get('swapBlackAndWhite')) {\n          viewer.setSwapBlackAndWhite(appearance.swapBlackAndWhite);\n        }\n        if (\"ghostHidden\" in appearance && appearance.ghostHidden !== prefs.get('ghosting')) {\n          isModel3d && viewer.setGhosting(appearance.ghostHidden);\n        }\n        if (\"displayLines\" in appearance && appearance.displayLines !== prefs.get('lineRendering')) {\n          viewer.hideLines(!appearance.displayLines);\n        }\n        if (\"displayPoints\" in appearance && appearance.displayPoints !== prefs.get('pointRendering')) {\n          viewer.hidePoints(!appearance.displayPoints);\n        }\n      }\n\n      // SAO and AA at the end.\n      if (isModel3d && saoEnabled !== prefs.ambientShadows && antiAliasing !== prefs.antialiasing) {\n        viewer.setQualityLevel(saoEnabled, antiAliasing);\n      }\n    }\n\n    // Restore cutplanes (aka: Sectioning) data only for 3d models.\n    if (Array.isArray(viewerState.cutplanes) && viewer.model && isModel3d) {\n      var cutplanes = [];\n      for (var i = 0; i < viewerState.cutplanes.length; i++) {\n        var plane = viewerState.cutplanes[i];\n        if (Array.isArray(plane) && plane.length >= 4) {\n          cutplanes.push(new THREE.Vector4(plane[0], plane[1], plane[2], plane[3]));\n        }\n      }\n\n      removeUnneededCutplanes(viewerState, cutplanes);\n\n      viewer.impl.setCutPlaneSet('__set_view', cutplanes);\n    }\n\n    // Allow extensions to restore their data\n    for (var extensionName in viewer.loadedExtensions) {\n      var extension = viewer.loadedExtensions[extensionName];\n      extension.restoreState && extension.restoreState(viewerState, immediate);\n    }\n\n    return true;\n  };\n\n  /**\n      * Gets the environment identifier.\n      * \n      * @returns {string}\n      * @private\n      */\n  this.getEnvironmentName = function () {\n    var preset = LightPresets[viewer.impl.currentLightPreset()];\n    if (!preset) {\n      return 'none';\n    }\n    return preset.name;\n  };\n\n  /**\n      * Restores camera states values back into the viewer.\n      * We avoid using methods such as setViewFromCamera() because those make some\n      * assumptions about the current state of the viewer. We need no such things.\n      *\n      * Note: Implementation based on Viewer3DImpl.setViewFromCamera()\n      *\n      * @param {object} camera\n      * @param {boolean} immediate\n      * @private\n      */\n  this.restoreCameraState = function (camera, immediate) {\n\n    viewer.impl.adjustOrthoCamera(camera);\n    var navapi = viewer.navigation;\n\n    if (!immediate) {\n      // With animation\n      viewer.impl.camera.isPerspective = camera.isPerspective;\n      navapi.setRequestTransitionWithUp(true, camera.position, camera.target, camera.fov, camera.up, camera.worldup, camera.pivot);\n    } else {\n      // Instantaneous, no animation\n      if (camera.isPerspective) {\n        navapi.toPerspective();\n      } else {\n        navapi.toOrthographic();\n      }\n      navapi.setCameraUpVector(camera.up);\n      navapi.setWorldUpVector(camera.worldup);\n      navapi.setView(camera.position, camera.target);\n      navapi.setPivotPoint(camera.pivot);\n      navapi.setVerticalFov(camera.fov, false);\n\n      viewer.impl.syncCamera(true);\n    }\n  };\n\n  /**\n      * Return true if two viewer states are equal, it's possible to compare only a subset of the objects providing a filter\n      * as parameter.\n       * @param {object} viewerStateA\n      * @param {object} viewerStateB\n      * @param {object} [filter] - Similar in structure to viewerState used to filter out values to check.\n      * @returns {boolean} True if the states are equal.\n      * @tutorial viewer_state\n      */\n\n  this.areEqual = function (viewerStateA, viewerStateB, filter) {\n\n    function areArraysEqual(arrayA, arrayB) {\n\n      arrayA = arrayA || [];\n      arrayB = arrayB || [];\n\n      if (arrayA.length !== arrayB.length) {\n        return false;\n      }\n\n      for (var i = 0; i < arrayA.length; ++i) {\n        if (arrayA[i] !== arrayB[i]) {\n          return false;\n        }\n      }\n\n      return true;\n    }\n\n    function areVectorsEqual(vectorA, vectorB, epsilon) {\n\n      vectorA = vectorA || [];\n      vectorB = vectorB || [];\n\n      if (vectorA.length !== vectorB.length) {\n        return false;\n      }\n\n      if (vectorA.length === 0) {\n        return false;\n      }\n\n      return (\n        areNumbersEqual(vectorA[0], vectorB[0], epsilon) ||\n        areNumbersEqual(vectorA[1], vectorB[1], epsilon) ||\n        areNumbersEqual(vectorA[2], vectorB[2], epsilon));\n\n    }\n\n    function areNumbersEqual(numberA, numberB, epsilon) {\n\n      var parcedA = numberA ? parseFloat(numberA) : null;\n      var parcedB = numberA ? parseFloat(numberB) : null;\n\n      var typeOfA = _typeof(parcedA);\n      var typeOfB = _typeof(parcedB);\n\n      if (typeOfA === 'number' && typeOfB === 'number') {\n        return Math.abs(numberA - numberB) < epsilon;\n      }\n\n      numberA = numberA ? numberA : null;\n      numberB = numberB ? numberB : null;\n\n      return numberA === numberB;\n    }\n\n    var stateA = viewerStateA;\n    var stateB = viewerStateB;\n    var epsilon = 0.000000001;\n\n    if (filter && filter !== true) {\n      stateA = this.applyFilter(stateA, filter);\n      stateB = this.applyFilter(stateB, filter);\n    }\n\n    if (stateA[\"seedURN\"] !== stateB[\"seedURN\"]) {\n      return false;\n    }\n\n    // Check object set (only check first element, the one written by ViewerState).\n    var objectSetA = stateA[\"objectSet\"] || [];\n    var objectSetB = stateB[\"objectSet\"] || [];\n\n    if (objectSetA.length !== objectSetB.length) {\n      return false;\n    }\n\n    var objectA = objectSetA[0] || {};\n    var objectB = objectSetB[0] || {};\n\n    if (\n    objectA.idType !== objectB.idType ||\n    !areNumbersEqual(objectA.explodeScale, objectB.explodeScale, epsilon) ||\n    !areArraysEqual(objectA.id, objectB.id) ||\n    !areArraysEqual(objectA.isolated, objectB.isolated) ||\n    !areArraysEqual(objectA.hidden, objectB.hidden)) {\n      return false;\n    }\n\n    // Check Viewport.\n    var viewportA = stateA[\"viewport\"] || {};\n    var viewportB = stateB[\"viewport\"] || {};\n\n    if (viewportA[\"name\"] !== viewportB[\"name\"] ||\n    viewportA[\"projection\"] !== viewportB[\"projection\"] ||\n    viewportA[\"isOrthographic\"] !== viewportB[\"isOrthographic\"] ||\n    !areNumbersEqual(viewportA[\"distanceToOrbit\"], viewportB[\"distanceToOrbit\"], epsilon) ||\n    // !areNumbersEqual(viewportA[\"aspectRatio\"], viewportB[\"aspectRatio\"], epsilon) ||\n    !areNumbersEqual(viewportA[\"fieldOfView\"], viewportB[\"fieldOfView\"], epsilon) ||\n    !areNumbersEqual(viewportA[\"orthographicHeight\"], viewportB[\"orthographicHeight\"], epsilon) ||\n    !areVectorsEqual(viewportA[\"eye\"], viewportB[\"eye\"], epsilon) ||\n    !areVectorsEqual(viewportA[\"target\"], viewportB[\"target\"], epsilon) ||\n    !areVectorsEqual(viewportA[\"up\"], viewportB[\"up\"], epsilon) ||\n    !areVectorsEqual(viewportA[\"worldUpVector\"], viewportB[\"worldUpVector\"], epsilon) ||\n    !areVectorsEqual(viewportA[\"pivotPoint\"], viewportB[\"pivotPoint\"], epsilon)) {\n      return false;\n    }\n\n    // Skip render options, cut planes and extension data.\n    return true;\n  };\n\n  /**\n      * Helper method with the intent to change the type of an array with ids from String to ints.\n      * We need this method because we need to make sure that ids that get fed into the ViewerState\n      * are in the correct type.\n      *\n      * @param {Array} array - For example, `[\"45\", \"33\", \"1\"]`.\n      * @returns {Array} For example, `[45, 33, 1]`.\n      * @private\n      */\n  this.toIntArray = function (array) {\n    var ret = [];\n    if (Array.isArray(array)) {\n      for (var i = 0, len = array.length; i < len; ++i) {\n        ret.push(parseInt(array[i]));\n      }\n    }\n    return ret;\n  };\n\n\n  /**\n      * Helper method that constructs a Vector3 from a given Array.\n      * If Array is not well-formed, then the failValue is return instead.\n      *\n      * @param {array} array - An array with 3 values.\n      * @param {THREE.Vector3} failValue - If array param is invalid, failValue will be returned instead.\n      * @returns {THREE.Vector3} Either a new Vector with values coming from 'array' or failValue.\n      * @private\n      */\n  this.getVector3FromArray = function (array, failValue) {\n\n    if (array instanceof Array && array.length > 2) {\n\n      // Some array values are exported as string-of-numbers. Fix that here.\n      array[0] = parseFloat(array[0]);\n      array[1] = parseFloat(array[1]);\n      array[2] = parseFloat(array[2]);\n      return new THREE.Vector3().fromArray(array);\n    }\n    return failValue;\n  };\n\n  /**\n      * Helper function that returns selected node ids in an array.\n      * @param {Model} [model] - model \n      * @returns {array}\n      * @private\n      */\n  this.getSelectedNodes = function (model) {\n    model = model || viewer.model;\n    return model.selector ? model.selector.getSelection() : [];\n  };\n\n  /**\n      * Helper function that returns the index values of the isolated (visible) layers.\n      * Applies only to 2d models/blueprints\n      * @param {Autodesk.Viewing.Model} [model]\n      * @private\n      */\n  this.getVisibleLayers2d = function (model) {\n    if (!model || model === viewer.model) return viewer.impl.getVisibleLayerIndices();\n\n    logger.warn('[getVisibleLayers2d] multiple models not yet supported.');\n    return [];\n  };\n\n  /**\n      * Helper function that returns true if all layers are visible.\n      * Applies only to 2d models/blueprints\n      * @param {Autodesk.Viewing.Model} [model]\n      * @private\n      */\n  this.areAllLayersVisible = function (model) {\n    if (!model || model === viewer.model) return viewer.impl.layers.allLayersVisible();\n\n    logger.warn('[areAllLayersVisible] multiple models not yet supported.');\n    // All of the layers should be visible\n    return true;\n  };\n\n  /**\n      * Gets the aspect ratio.\n      * @returns {number} Aspect ratio.\n      * @private\n      */\n  this.getAspectRatio = function () {\n    var viewport = viewer.navigation.getScreenViewport();\n    var aspect = viewport.width / viewport.height;\n    return aspect;\n  };\n\n  /**\n      * Returns world height when in orthographic camera mode.\n      * @returns {number} Orthographic height.\n      * @private\n      */\n  this.getOrthographicHeight = function () {\n    var cam = viewer.navigation.getCamera();\n    if (cam.isPerspective) return 0;\n    return Math.abs(2 * cam.orthographicCamera.top);\n  };\n\n  /**\n      * Returns the URN of the document model.\n      * @returns {string} Model URN.\n      */\n  this.getSeedUrn = function (model) {var _model;\n    model = model || viewer.model;\n    return ((_model = model) === null || _model === void 0 ? void 0 : _model.getSeedUrn()) || \"\";\n  };\n\n  /**\n      * Returns the slider value for the viewer's current light intensity.\n      * @returns {number}\n      * @private\n      */\n  this.getToneMapIntensity = function () {\n\n    // Original code from RenderOptionsPanel.js\n    // Should probably live elsewhere in the api.\n    var intensity = 0.0;\n    if (viewer.impl.dir_light1) {\n      if (viewer.impl.dir_light1.intensity != 0)\n      intensity = Math.log(viewer.impl.dir_light1.intensity) / Math.log(2.0);else\n\n      intensity = -1e-20;\n    }\n    return intensity;\n  };\n\n  /**\n      * Returns the index of the LightPreset with a matching name value.\n      * @param environmentName\n      * @returns {number} Index of LightPreset, or -1 if not found.\n      * @private\n      */\n  this.getLightPresetIndex = function (environmentName) {\n\n    for (var i = 0; i < LightPresets.length; i++) {\n      if (LightPresets[i].name === environmentName) {\n        return i;\n      }\n    }\n    return -1;\n  };\n\n  /**\n      * Filters out key/value pairs from the viewerState.\n      *\n      * To get all of the values available use FILTER_ALL. If no filter is provided FILTER_ALL will be used.\n      * It is encourage for consumers to define their specialized filters.\n      *\n      * @param {object} viewerState - Object to be filtered.\n      * @param {object} filter - Object with a similar structure to viewerState, where values are Booleans signaling which\n      * elements should be included (true) and which ones should not (false).\n      * If a viewerState key is not found in the filter, we assume that it is non-wanted.\n      * @private\n      */\n  this.applyFilter = function (viewerState, filter) {\n\n    // Check the 'ALL' filter\n    if (filter === true) return;\n\n    // Filtering only 1 level depth keys\n    // Additional levels are checked recursively.\n    for (var key in viewerState) {\n\n      if (!viewerState.hasOwnProperty(key)) {\n        continue;\n      }\n\n      // Try to find the key in the filter object\n      var filterValue = filter[key];\n\n      if (filterValue === undefined) {\n\n        // key not enabled in filter, remove key/value pair from viewerState.\n        delete viewerState[key];\n      } else\n      if (typeof filterValue === 'boolean') {\n\n        if (filterValue === false) {\n          // key explicitly flagged for removal, remove key/value pair from viewerState.\n          delete viewerState[key];\n        }\n      } else\n      if (filterValue instanceof Object) {\n\n        if (viewerState[key] instanceof Object) {\n          // Both are Objects, recursive call on them.\n          this.applyFilter(viewerState[key], filter[key]);\n        } else {\n          // This case signals a miss-match between filter and value.\n          // Since it's an undefined case, we'll be inclusive for the time being.\n          // *** Keep the value in viewerState ***\n          logger.warn(\"[applyFilter] A - Invalid filter Object for key [\" + key + \"]\");\n        }\n      } else\n      {\n\n        // Note: Every other value for filter is invalid.\n        // For now, we'll keep the key/value in viewerState.\n        logger.warn(\"[applyFilter] B - Invalid filter value for key [\" + key + \"]\");\n      }\n\n    }\n  };\n\n  /**\n      * Converts viewport coordinates into range [0...1] using the model's bounding box.\n      * \n      * @param {object} viewerState - A state object obtained via `viewer.getState()`. The object is modified in-place.\n      */\n  this.normalizeCoordinates = function (viewerState) {\n\n    var viewport = viewerState.viewport;\n    if (viewport) {\n\n      // Avoid operating on the object more than once\n      if (viewport.normalized) {\n        logger.warn('invalid normalization of state.viewport. Ignoring command.');\n        return;\n      }\n\n      // Add flag\n      viewport.normalized = true;\n\n      var mat = SceneMath.getNormalizingMatrix(viewer.model);\n      applyMatrix(viewport, mat);\n\n      // Change orthographicHeight as a ratio of the model's bounding-box height.\n      if ('orthographicHeight' in viewport) {\n        var bbox = viewer.model.myData.bbox;\n        var bboxHeight = bbox.max.y - bbox.min.y;\n        var newValue = viewport.orthographicHeight / bboxHeight;\n        viewport.orthographicHeight = newValue;\n      }\n    }\n  };\n\n  /**\n      * Converts normalized coordinates [0..1] into bounding box coordinates. \n      * \n      * @param {object} viewerState - A state object obtained via `viewer.getState()`. The object is modified in-place.\n      */\n  this.denormalizeCoordinates = function (viewerState) {\n\n    var viewport = viewerState.viewport;\n    if (viewport) {\n\n      // Make sure data is normalized\n      if (!viewport.normalized) {\n        logger.warn('invalid denormalization of state.viewport. Ignoring command.');\n        return;\n      }\n\n      // Remove flag\n      delete viewport.normalized;\n\n      var mat = SceneMath.getNormalizingMatrix(viewer.model);\n      var matInv = new THREE.Matrix4().getInverse(mat);\n      applyMatrix(viewport, matInv);\n\n      // Restore orthographicHeight from a ratio of the model's bounding-box height.\n      if ('orthographicHeight' in viewport) {\n        var bbox = viewer.model.myData.bbox;\n        var bboxHeight = bbox.max.y - bbox.min.y;\n        var newValue = viewport.orthographicHeight * bboxHeight;\n        viewport.orthographicHeight = newValue;\n      }\n    }\n  };\n\n}\n\nViewerState.prototype.constructor = ViewerState;\n\n\n\nfunction applyMatrix(viewport, matrix) {\n  var eye = new THREE.Vector3(viewport.eye[0], viewport.eye[1], viewport.eye[2]);\n  var pivot = new THREE.Vector3(viewport.pivotPoint[0], viewport.pivotPoint[1], viewport.pivotPoint[2]);\n  var target = new THREE.Vector3(viewport.target[0], viewport.target[1], viewport.target[2]);\n\n  eye.applyMatrix4(matrix);\n  pivot.applyMatrix4(matrix);\n  target.applyMatrix4(matrix);\n\n  viewport.eye[0] = eye.x;\n  viewport.eye[1] = eye.y;\n  viewport.eye[2] = eye.z;\n  viewport.pivotPoint[0] = pivot.x;\n  viewport.pivotPoint[1] = pivot.y;\n  viewport.pivotPoint[2] = pivot.z;\n  viewport.target[0] = target.x;\n  viewport.target[1] = target.y;\n  viewport.target[2] = target.z;\n}","//Functional wrapper around a bubble manifest json providing common functionality\n\nvar nextId = 1;\n\nfunction checkForPropertyDb(item) {\n  if (item.mime == \"application/autodesk-db\" && item.urn) {\n    //Of course, OSS is a storage system that mangles paths because why not,\n    //so it needs special handling to extract the property database path\n    if (item.urn.indexOf(\"urn:adsk.objects:os.object\") === 0)\n    return item.urn.substr(0, item.urn.lastIndexOf(\"%2F\") + 3);else\n\n    return item.urn.substr(0, item.urn.lastIndexOf(\"/\") + 1);\n  }\n  return null;\n}\n\n\n/**\n   * Wrapper and helper for \"bubble\" data.\n   *\n   * _Bubble_ is a container of various 2D or 3D viewables (and additional data)\n   * that may be generated from a single seed file. The bubble is a JSON structure\n   * of nodes that have different roles, for example, they may represent sheets,\n   * nested 2D/3D geometry, etc.\n   *\n   * This class wraps the internal representation of the bubble\n   * and adds a couple of helper methods.\n   *\n   * @constructor\n   * @memberof Autodesk.Viewing\n   * @alias Autodesk.Viewing.BubbleNode\n   * @param {object} rawNode Raw node from the bubble JSON.\n   * @param {object} [parent] Parent node from the bubble JSON.\n   */\nexport var BubbleNode = function BubbleNode(rawNode, parent) {\n\n  this.parent = parent;\n\n  //Just an integer ID for use in runtime hashmaps\n  this.id = nextId++;\n\n  //TODO: do we need to clone the data into outselves, or just keep pointer as is\n  //would be a waste of space to copy...\n  this.data = rawNode;\n\n  //Now do some postprocessing / precomputation of things we will need\n  //TODO: are there nodes with type==geometry where role isn't 3d nor 2d?\n  this.isLeaf = rawNode.type === \"geometry\" && (rawNode.role === \"3d\" || rawNode.role === \"2d\" || rawNode.role === \"lod\");\n\n  if (Array.isArray(rawNode.children) || Array.isArray(rawNode.derivatives)) {\n    this.children = [];\n\n    //Recurse\n    var rawChildren = rawNode.children || rawNode.derivatives;\n    var len = rawChildren.length;\n\n    for (var i = 0; i < len; i++) {\n      this.children[i] = new BubbleNode(rawChildren[i], this);\n    }\n\n    if (this.children.length > 1) {\n      this.children.sort(function (a, b) {\n        if (!(a.data.hasOwnProperty('order') && b.data.hasOwnProperty('order'))) return 0;\n        return a.data.order - b.data.order; // order number is expected to be an integer\n      });\n    }\n\n    //Some more postprocessing / precomputation of things we will need\n    //Some properties are determined by specific children. Look for those.\n    for (var i = 0; i < len; i++) {\n      //Find the node's shared property db path -- if there is one, it's one of the children\n      var path = checkForPropertyDb(rawChildren[i]);\n      if (path)\n      this.sharedPropertyDbPath = path;\n\n      //Check if a child geometry is an LOD model\n      //TODO: expect a change in the extractor to put the lod role in the node itself\n      //so this check will be made on item instead of its children eventually.\n      if (rawChildren[i].role === \"lod\")\n      this.lodNode = this.children[i];\n    }\n  }\n};\n\nBubbleNode.prototype.constructor = BubbleNode;\n\n/**\n                                                * Store an instance to the Document.\n                                                * @param {Autodesk.Viewing.Document} lmvDoc \n                                                */\nBubbleNode.prototype.setDocument = function (lmvDoc) {\n  this.lmvDocument = lmvDoc;\n};\n\n/**\n    * Get the Document instance which owns this node.\n    * @returns {Autodesk.Viewing.Document|undefined}\n    */\nBubbleNode.prototype.getDocument = function () {\n\n  var parent = this;\n  while (parent.parent) {\n    parent = parent.parent;}\n\n  return parent.lmvDocument;\n};\n\n/**\n    * @returns {bool} true if the bubble hierarchy contains an embedded otg manifest.\n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#isOtg\n    */\nBubbleNode.prototype.isOtg = function () {\n  return !!this._getOtgManifest();\n};\n\n/**\n    * Find the embedded otg_manifest (if avaialble)\n    * @private\n    * @returns {Object|null}\n    */\nBubbleNode.prototype._getOtgManifest = function () {\n\n  if (typeof DISABLE_OTG !== \"undefined\" && DISABLE_OTG)\n  return null;\n\n  var viewable = this.findViewableParent();\n\n  if (!viewable)\n  return null;\n\n  var m = viewable.data.otg_manifest;\n\n  //This falls back to no OTG in case OTG conversion\n  //is still pending or failed, or otherwise not succeeded.\n  //TODO: Probably not the right place for this check in case\n  //the application needs to check on the conversion progress, etc...\n  //if (!m || m.status !== \"success\")\n  //\treturn null;\n\n  return m;\n};\n\n\n/**\n    * @returns {bool} true if the bubble is from MD API.\n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#isSVF2\n    */\nBubbleNode.prototype.isSVF2 = function () {\n  var m = this._getOtgManifest();\n  return m && m.paths && m.paths.pharos_type == 'cacheable';\n};\n\n/**\n    * Returns the OTG viewable from an otg manifest (if available, otherwise undefined)\n    * \n    * @returns {Autodesk.Viewing.BubbleNode|undefined}\n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#getOtgGraphicsNode\n    */\nBubbleNode.prototype.getOtgGraphicsNode = function () {\n\n  if (this.isViewPreset()) {\n    return this.findParentGeom2Dor3D().getOtgGraphicsNode();\n  }\n\n  var otgManifest = this._getOtgManifest();\n  return otgManifest && otgManifest.views && otgManifest.views[this.guid()];\n};\n\n\n/**\n    * Returns a list of property database files.\n    * Previously, for v1, this list was hardcoded in PropWorker/\n    * This function knows about v2 and cross-version sharing of OTG property databases\n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#getPropertyDbManifest\n    */\nBubbleNode.prototype.getPropertyDbManifest = function () {\n  var otgManifest = this._getOtgManifest();\n  var result;\n\n  if (otgManifest && otgManifest.pdb_manifest) {\n\n    var pdbManifest = otgManifest.pdb_manifest;\n    result = {\n      propertydb: {},\n      isOtg: true };\n\n\n    for (var i = 0; i < pdbManifest.assets.length; i++) {\n      var asset = pdbManifest.assets[i];\n\n      //OTG v2 property databases do not have a single root path.\n      //They have shared (cross-version) components and also per-version\n      //components. Construct the paths accordingly.\n      var path;\n      if (asset.isShared) {\n        path = otgManifest.paths.shared_root + pdbManifest.pdb_shared_rel_path;\n      } else {\n        path = otgManifest.paths.version_root + pdbManifest.pdb_version_rel_path;\n      }\n\n      result.propertydb[asset.tag] = [{ path: path + asset.uri, isShared: asset.isShared }];\n    }\n\n    //If the property database is OTG, but the specific node we are asking about is not\n    //e.g. it is an F2D or SVF, we need to indicate that the Ids mapping needs to be loaded as well.\n    var otgNode = this.getOtgGraphicsNode();\n    if (!otgNode) {\n      result.needsDbIdRemap = true;\n    }\n\n  } else {\n\n    //relative to the shared property db path.\n    //Same as the list hardcoded in PropWorker.\n    //TODO: Get rid of the list hardcoded in the worker and use this one always.\n    var path = this.findPropertyDbPath();\n\n    if (path === null) {\n      console.warn(\"Missing property database entry in manifest.\");\n      path = \"\";\n    }\n\n    if (path.indexOf(\"$file$\") === 0) {\n      console.warn(\"Bubble local path given for shared property DB files. Assuming that sharedPropertyDbPath is specified correctly by loadDocumentNode().\");\n      path = \"\";\n    }\n\n    var _document = this.getDocument();\n    if (_document && path.indexOf('urn') === 0) {\n      path = _document.getFullPath(path);\n    }\n\n    result = {\n      propertydb: {\n        attrs: [{ path: path + \"objects_attrs.json.gz\" }],\n        values: [{ path: path + \"objects_vals.json.gz\" }],\n        avs: [{ path: path + \"objects_avs.json.gz\" }],\n        offsets: [{ path: path + \"objects_offs.json.gz\" }],\n        ids: [{ path: path + \"objects_ids.json.gz\" }] } };\n\n\n\n  }\n\n  return result;\n};\n\n/**\n    * @returns {Autodesk.Viewing.BubbleNode} Top-most bubble node.\n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#getRootNode\n    */\nBubbleNode.prototype.getRootNode = function () {\n\n  if (this.parent)\n  return this.parent.getRootNode();\n\n  return this;\n};\n\n/**\n    * Whether the manifest comes form Forge (modelDerivativeV2) or not (derivativeV2).\n    * Applies only to the root node. Used internally.\n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#isForgeManifest\n    */\nBubbleNode.prototype.isForgeManifest = function () {\n\n  var root = this.getRootNode();\n\n  // Forge manifest contains attribute `type` with value `manifest`. Other manifest do not.\n  return root.data.type === \"manifest\";\n};\n\n/**\n    * Finds shared property DB if there is one.\n    *\n    * @returns {?string} Shared property DB path, or null.\n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#findPropertyDbPath\n    */\nBubbleNode.prototype.findPropertyDbPath = function () {\n\n  //In the case of OTG manifest, always return the shared property database path from\n  //the property database entry in the OTG manifest. This is even in the case where\n  //we are loading F2D file, or falling back to an SVF in case of missing OTG (deprecated code path).\n  //In the F2D and fallback SVF case, the\n  var otgManifest = this._getOtgManifest();\n  var pdbManifest = otgManifest && otgManifest.pdb_manifest;\n  if (pdbManifest && pdbManifest.assets && pdbManifest.assets.length) {\n    var versionRoot = otgManifest.paths.version_root;\n    var pdbRelPath = otgManifest.pdb_manifest.pdb_version_rel_path;\n    return versionRoot + pdbRelPath;\n  } else if (otgManifest) {\n    console.warn(\"Unexpected: OTG manifest exists, but it has no property database manifest.\");\n  }\n\n  if (this.sharedPropertyDbPath)\n  return this.sharedPropertyDbPath;\n\n  if (this.parent)\n  return this.parent.findPropertyDbPath();\n\n  return null;\n};\n\n// Deprecated. Avoid using this from the outside.\nBubbleNode.prototype._raw = function () {\n  return this.data;\n};\n\n/**\n    * @returns {string} Node name.\n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#name\n    */\nBubbleNode.prototype.name = function () {\n  return this.data.name || '';\n};\n\n/**\n    * @returns {string} Node GUID.\n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#guid\n    */\nBubbleNode.prototype.guid = function () {\n  return this.data.guid;\n};\n\n\n/**\n    * @returns {string} Node type.\n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#type\n    */\nBubbleNode.prototype.type = function () {\n  return this.data.type;\n};\n\n/**\n    * @returns {?string[]} Either an Array of extension ids, or undefined.\n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#extensions\n    */\nBubbleNode.prototype.extensions = function () {\n  if (this.data.extensions) {\n    return Array.isArray(this.data.extensions) ? this.data.extensions : [this.data.extensions];\n  }\n  return undefined;\n};\n\n/**\n    * Retrieves the URN of the node or its closest ancestor.\n    *\n    * @param {boolean} searchParent If URN is not available for this node,\n    * search through its ancestors, too.\n    * @returns {string} Viewable URN.\n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#urn\n    */\nBubbleNode.prototype.urn = function (searchParent) {\n\n  var urn = this.data.urn;\n\n  if (!searchParent)\n  return urn;\n\n  var n = this.parent;\n  while (!urn && n) {\n    urn = n.data.urn;\n    n = n.parent;\n  }\n\n  return urn;\n};\n\n/** \n    * @returns {boolean} Is this a geometry leaf node. \n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#isGeomLeaf\n    */\nBubbleNode.prototype.isGeomLeaf = function () {\n  return this.isLeaf;\n};\n\n/** \n    * @returns {boolean} Is this a viewable node. \n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#isViewable\n    */\nBubbleNode.prototype.isViewable = function () {\n\n  return this.data.role === \"viewable\" || // derivativeService/v2/\n  this.data.outputType === \"svf\"; // modelDerivative/v2/\n};\n\n/** \n    * @returns {boolean} Is this an LOD node. \n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#getLodNode\n    */\nBubbleNode.prototype.getLodNode = function () {\n  return this.lodNode;\n};\n\n/** \n    * @returns {boolean} Is this a geometry node. \n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#isGeometry\n    */\nBubbleNode.prototype.isGeometry = function () {\n  return this.data.type === \"geometry\";\n};\n\n/** \n    * @returns {boolean} Is this a view preset/camera definition node. \n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#isViewPreset\n    */\nBubbleNode.prototype.isViewPreset = function () {\n  return this.data.type === \"view\";\n};\n\n\n/** \n    * @returns {boolean} Is this a 2D node. \n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#is2D\n    */\nBubbleNode.prototype.is2D = function () {\n  return this.data.role === \"2d\";\n};\n\n/** \n    * @returns {boolean} Is this a 3D node. \n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#is3D\n    */\nBubbleNode.prototype.is3D = function () {\n  return this.data.role === \"3d\";\n};\n\n/** \n    * @returns {boolean} Is this a 2D geometry node. \n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#is2DGeom\n    */\nBubbleNode.prototype.is2DGeom = function () {\n  return this.isGeometry() && this.is2D();\n};\n\n/** \n    * @returns {boolean} Is this a 3D geometry node. \n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#is3DGeom\n    */\nBubbleNode.prototype.is3DGeom = function () {\n  return this.isGeometry() && this.is3D();\n};\n\n/** \n    * @returns {boolean} true if the node is meant to be loaded initially.\n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#useAsDefault\n    */\nBubbleNode.prototype.useAsDefault = function () {\n  return this.data.useAsDefault === true;\n};\n\n/** \n    * @param {boolean} [searchMasterview=false] - Search for master view\n    * @param {boolean} [loadLargestView=false] - Sort by geometry size\n    * @returns {BubbleNode} A geometry node marked as `useAsDefault=true`. When none is found,\n    *                       it returns the first element from `this.search({'type': 'geometry'})`.\n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#getDefaultGeometry\n    */\nBubbleNode.prototype.getDefaultGeometry = function () {var searchMasterview = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;var loadLargestView = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;\n  var geoms = [];\n\n  if (searchMasterview) {\n    var masterViews = this.search(BubbleNode.MASTER_VIEW_NODE);\n    if (masterViews.length) {\n      geoms = masterViews[0].search({ 'type': 'geometry' });\n    }\n  }\n\n  if (geoms.length == 0) {\n    geoms = this.search({ 'type': 'geometry' });\n  }\n\n  if (loadLargestView) {\n    geoms.sort(function (a, b) {\n      return b.data.size - a.data.size;\n    });\n  }\n\n  for (var i = 0; i < geoms.length; ++i) {\n    if (geoms[i].useAsDefault())\n    return geoms[i];\n  }\n  return geoms[0]; // just get the first one.\n};\n\n/**\n   *  @deprecated\n    * @returns {object} Placement transform of the node.\n    *\n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#getPlacementTransform\n    */\nBubbleNode.prototype.getPlacementTransform = function () {\n\n  console.warn(\"BubbleNode.getPlacementTransform is deprecated. Sheet placement information is stored in AECModelData.json\");\n  return null;\n};\n\n/**\n    * @deprecated\n    */\nBubbleNode.prototype.getHash = function () {\n\n  console.warn(\"BubbleNode.getHash is deprecated and will be removed in a future release.\");\n  return null;\n};\n\n/**\n    * Returns a rectangular area. Applies only to 2D documents.\n    * \n    * @returns {Array} containing 4 numbers: left, top, right, bottom\n    */\nBubbleNode.prototype.getViewBox = function () {\n  return this.data.viewbox;\n};\n\n/** \n    * @returns {boolean} Is this a metadata node. \n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#isMetadata\n    */\nBubbleNode.prototype.isMetadata = function () {\n  //Certain nodes are not relevant for display purposes,\n  //as they contain no graphics and provide extra information for\n  //the graphics nodes.\n  if (this.data.role) {\n    if (this.data.role.indexOf(\"Autodesk.CloudPlatform.DesignDescription\") !== -1)\n    return true;\n    if (this.data.role === \"Autodesk.CloudPlatform.PropertyDatabase\")\n    return true;\n  }\n\n  return false;\n};\n\n/**\n    * @returns {?Autodesk.Viewing.BubbleNode} First parent in the hierarchy that is a viewable. If called\n    * on the top level design node, returns the first child of the design node that is a viewable.\n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#findViewableParent\n    */\nBubbleNode.prototype.findViewableParent = function () {\n\n  //Some manifests have weird structure where lower level\n  //folders also claim they are viewables, so we have to skip\n  //past those and keep going up the chain.\n  var topViewable = null;\n\n  var p = this;\n  while (p) {\n    if (p.isViewable())\n    topViewable = p;\n    p = p.parent;\n  }\n\n  //If this is the top level design node, get the viewable node\n  //from its children (most of the time it's the first and only viewable child)\n  if (!topViewable && !this.parent && this.children) {\n    for (var i = 0; i < this.children.length; i++) {\n      var c = this.children[i];\n      if (c.isViewable()) {\n        topViewable = c;\n        break;\n      }\n    }\n  }\n\n  return topViewable;\n};\n\n/**\n    * \n    * @param {object} [options] - Advance usage options\n    * @param {Autodesk.Viewing.BubbleNode} [options.fallbackParent] - Gets returned when no geometry node is available after iterating through the parent chain.\n    * \n    * @returns {?Autodesk.Viewing.BubbleNode} First parent in the hierarchy that is a 2D or 3D geometry.\n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#findParentGeom2Dor3D\n    */\nBubbleNode.prototype.findParentGeom2Dor3D = function (options) {\n\n  var p = this;\n  while (p && !p.is2DGeom() && !p.is3DGeom()) {\n    p = p.parent;}\n\n  // Some InfraWork translations generate manifests where view-nodes are not\n  // direct children of geometry nodes, but instead they are uncles.\n  // Therefore, to have the functionality somewhat work, the uncle attempts to \n  // find one of the nephews.\n  if (!p && this.isViewPreset()) {\n    var geometrySiblings = this.findGeometryFromSiblings();\n\n    // We have no good criteria here to pick one of those siblings,\n    // so just return the first one from the list.\n    p = geometrySiblings[0];\n\n    // If a fallback parent is available, use it\n    if (options && options.fallbackParent) {\n      p = options.fallbackParent;\n    }\n  }\n\n  return p;\n};\n\n/**\n    * Iterate over all siblings and return a list containing all\n    * available geometry nodes.\n    * \n    * @return {Autodesk.Viewing.BubbleNode[]} - list of BubbleNodes of geometry type.\n    */\nBubbleNode.prototype.findGeometryFromSiblings = function () {\n\n  var dad = this.parent;\n  if (!dad)\n  return [];\n\n  var allCandidates = [];\n  for (var i = 0, len = dad.children.length; i < len; ++i) {\n    var child = dad.children[i];\n\n    // Skip ourselves\n    if (child === this)\n    continue;\n\n    var candidate;\n    child.traverse(function (item) {\n      if (item.isGeometry() && (item.is2D() || item.is3D())) {\n        candidate = item;\n        return true;\n      }\n    });\n\n    if (candidate)\n    allCandidates.push(candidate);\n  }\n\n  return allCandidates;\n};\n\n/**\n    * @returns {Autodesk.Viewing.BubbleNode[]} - Array with all of the viewables under this node.\n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#findAllViewables\n    */\nBubbleNode.prototype.findAllViewables = function () {\n\n  var ret = [];\n\n  var isForge = this.isForgeManifest();\n  if (isForge) {\n    ret = this.search({ outputType: \"svf\" });\n  }\n\n  var ret2 = this.search({ role: \"viewable\" });\n  return ret.concat(ret2); // the order here matters.\n};\n\n/**\n    * Looks for the viewable root path in this node and all its children.\n    * @param {Boolean} ignoreLeaflet If set, it will skip any image pyramid sub-nodes and return a path to F2D file if available.\n    * @returns {?string} Viewable root path, or null.\n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#getViewableRootPath\n    */\nBubbleNode.prototype.getViewableRootPath = function (ignoreLeaflet) {\n\n  // If we have an embedded otg manifest, use it to get otg path for the resource,\n  //by looking for its GUID in the OTG manifest mapping.\n  var otgGraphicsNode = this.getOtgGraphicsNode();\n  if (otgGraphicsNode && !otgGraphicsNode.error) {// in case of translation error, ignore the otgNode\n    var otgManifest = this._getOtgManifest();\n    return otgManifest.paths.version_root + otgGraphicsNode.urn;\n  }\n\n  if (!this.isGeomLeaf())\n  return this.urn();\n\n  //prioritize Leaflet image pyramids over the blank F2Ds that they have alongside them\n  if (!ignoreLeaflet && this.is2D()) {\n    var leafletItems = this.search({ role: \"leaflet\" });\n    if (leafletItems && leafletItems.length) {\n      return leafletItems[0].urn();\n    }\n  }\n\n  var mime = this.is2D() ? \"application/autodesk-f2d\" : \"application/autodesk-svf\";\n\n  var items = this.search({ mime: mime });\n\n  if (items && items.length) {\n    var path = items[0].urn();\n    return path;\n  }\n\n  return null;\n};\n\n/**\n    * Returns all the named view in the viewable. \n    * Named views are obtained from the document’s manifest which contains camera information and a string identifier.\n    *\n    * @returns {array} All named views. Returns empty array if none are found.\n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#getNamedViews\n    */\nBubbleNode.prototype.getNamedViews = function () {\n  var views = this.search({ \"type\": \"view\" });\n  // Only keep views that have names and camera info\n  views = views.filter(function (bubbleNode) {\n    if (!bubbleNode.data.name) return false;\n    if (!Array.isArray(bubbleNode.data.camera)) return false;\n    return true;\n  });\n  return views;\n};\n\n/**\n    * Returns first node from the bubble matching a GUID.\n    *\n    * Note that some GUIDs in the bubble are not unique, you have to be sure\n    * you are looking for a GUID that is unique if you want correct result\n    * from this function. Otherwise use the generic search.\n    *\n    * @param {string} guid Node GUID.\n    * @returns {?Autodesk.Viewing.BubbleNode} Matching bubble node, or null.\n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#findByGuid\n    */\nBubbleNode.prototype.findByGuid = function (guid) {\n  var item = null;\n\n  this.traverse(function (node) {\n    if (node.data.guid === guid) {\n      item = node;\n      return true;\n    }\n  });\n\n  return item;\n};\n\n/**\n    * Finds nodes from the bubble matching one or more properties.\n    *\n    * @param {object} propsToMatch Filter criteria:\n    * To match, nodes must have the specified properties and values.\n    * Use comma-separated _property:value_ pairs or named preset object.\n    * (See comments in examples below.)\n    * @returns {?(BubbleNode[])} Matching nodes, or null.\n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#search\n    * @example\n    * // Filter criteria syntax:\n    * //   { \"property\":\"value\" [, \"property\":\"value\", ...] }\n    * // or use named preset objects:\n    * //   BubbleNode.MODEL_NODE           { \"role\":\"3d\", \"type\":\"geometry\" }\n    * //   BubbleNode.GEOMETRY_SVF_NODE    { \"role\":\"graphics\", \"mime\": \"application/autodesk-svf\" }\n    * //   BubbleNode.SHEET_NODE           { \"role\":\"2d\", \"type\":\"geometry\" }\n    * //   BubbleNode.LEAFLET_NODE         { \"role\":\"leaflet\" }\n    * //   BubbleNode.IMAGE_NODE           { \"role\":\"image\" }\n    * //   BubbleNode.GEOMETRY_F2D_NODE    { \"role\":\"graphics\", \"mime\": \"application/autodesk-f2d\" }\n    * //   BubbleNode.VIEWABLE_NODE        { \"role\":\"viewable\" }\n    * //   BubbleNode.AEC_MODEL_DATA       { \"role\":\"Autodesk.AEC.ModelData\"}\n    * \n    * var singleProps = myBubbleNode.search({ \"type\":\"geometry\" });\n    * var multiProps  = myBubbleNode.search({ \"role\":\"3d\", \"type\":\"geometry\" });\n    * var presetProps = myBubbleNode.search( myBubbleNode.SHEET_NODE );\n    */\nBubbleNode.prototype.search = function (propsToMatch) {\n\n  var result = [];\n\n  this.traverse(function (node) {\n    var found = true;\n    for (var p in propsToMatch) {\n      if (!node.data.hasOwnProperty(p) || node.data[p] !== propsToMatch[p]) {\n        found = false;\n        break;\n      }\n    }\n    if (found)\n    result.push(node);\n  });\n\n  return result;\n};\n\n\n/**\n    * Recursively traverses the bubble, calling a callback function for each node,\n    * for as long as the callback function keeps returning false.\n    *\n    * @param {function} cb Callback function, accepts a bubble node as an argument,\n    * and returns true if the traversal should be terminated.\n    * @returns {boolean} Result of the last callback invokation.\n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#traverse\n    */\nBubbleNode.prototype.traverse = function (cb) {\n\n  //Allow the callback to exit early if it meets\n  //some internal condition and returns true.\n  if (cb(this)) return true;\n\n  if (this.children) {\n\n    for (var i = 0; i < this.children.length; i++) {\n\n      if (this.children[i].traverse(cb))\n      return true;\n\n    }\n\n  }\n\n  return false;\n};\n\n\n//======================================================================================\n// Revit/Fluent/Docs specific functionality\n//======================================================================================\n\n/**\n * Checks whether the storage URN of a viewable node matches the given Derivative Service design URN.\n * If the two don't match, then the Derivative Service URN is most likely a shallow copy model,\n * and the actual model storage belongs to the full original URN (returned by this function)\n */\nBubbleNode.prototype.getShallowCopySource = function (fromUrn) {\n\n  if (!this.isViewable()) {\n    console.error(\"getShallowCopySource must be called with a viewable node.\");\n    return null;\n  }\n\n  //Get the design URN if not explicitly given\n  if (!fromUrn)\n  fromUrn = this.parent.urn();\n\n  //Detect shallow copied URNs -- in such case we have to get\n  //the OTG data from the original seed.\n  var myUrn = this.urn();\n  if (myUrn !== fromUrn) {\n    if (!myUrn) {\n      console.warn(\"Unexpected: manifest viewable node does not have a urn property.\\n\".concat(JSON.stringify(this._raw())));\n    } else {\n      console.log(\"Redirecting shallow copied URN \".concat(fromUrn, \" to \").concat(myUrn));\n      fromUrn = myUrn;\n    }\n  }\n  return fromUrn;\n};\n\n\n/**\n    * @deprecated\n    * Returns the contents of the AECModelData.json supplementary file, if available.\n    */\nBubbleNode.prototype.getAecModelData = function () {\n\n  var viewable = this.findViewableParent();\n\n  if (!viewable)\n  return null;\n\n  if (!viewable.data.aec_model_data) {\n    console.warn(\"Use Document.getAecModelData(bubbleNode) instead of BubbleNode.getAecModelData(), or make sure Document.downloadAecModelData is loaded before using this API\");\n    return null;\n  }\n\n  return viewable.data.aec_model_data;\n};\n\n/**\n    * Returns refpoint transform from aecModelData as Matrix4\n    */\nBubbleNode.prototype.extractRefPointTransform = function () {\n  var aec = this.getAecModelData();\n  return aec && aec.refPointTransformation && BubbleNode.readMatrixFromArray12(aec.refPointTransformation);\n};\n\n/**\n    * Find and decode camera (if found). Works on geometry nodes and view nodes.\n    *  @returns {Object|null} - camera object with position, target etc. (see readCameraFromArray)\n    */\nBubbleNode.prototype.extractCamera = function () {\n\n  // view-nodes contain the camera directly\n  if (this.data.camera) {\n    return BubbleNode.readCameraFromArray(this.data.camera);\n  }\n\n  // For geometry nodes, find a contained view preset\n  var viewNode = this.isGeometry() && this.search({ type: 'view' })[0];\n  return viewNode ? viewNode.extractCamera() : null;\n};\n\n/**\n    * Returns the Revit Level/Floor of this bubble node. \n    * Only relevant for 2d sheets coming from Revit at the moment.\n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#getLevel\n    */\nBubbleNode.prototype.getLevel = function () {\n\n  // Eventually Revit should tag the bubble nodes with this value,\n  // currently it's just a guess done by Fluent.guessObjectLevels().\n\n  var level = this.data.levelNumber;\n\n  //TODO: for now, return the first level if a sheet shows multiple levels,\n  //since the UI code can't handle it.\n  if (Array.isArray(level))\n  return level[0];\n\n  return level;\n};\n\n/**\n    * Returns the Revit Level/Floor name of this bubble node. \n    * Only relevant for 2d sheets coming from Revit at the moment.\n    * \n    * @memberof Autodesk.Viewing.BubbleNode\n    * @alias Autodesk.Viewing.BubbleNode#getLevelName\n    */\nBubbleNode.prototype.getLevelName = function () {\n  return this.data.levelName || this.getLevel();\n};\n\n/**\n    * Returns true if the current node is a sheet.\n    * @returns {boolean} - true if a sheet false other wise.\n    */\nBubbleNode.prototype.isSheet = function () {\n  var parent = this.parent;\n\n  while (parent) {\n    if (parent.name() === \"Sheets\") return true;\n    parent = parent.parent;\n  }\n  return false;\n};\n\n/**\n    * Check if the current bubble node is a master view\n    * @returns {boolean} - true if the view is a master view false otherwise.\n    */\nBubbleNode.prototype.isMasterView = function () {\n  var masterViewName = BubbleNode.MASTER_VIEW_NODE.name;\n  var parent = this;\n\n  while (parent) {\n    if (parent.name() === masterViewName) return true;\n    parent = parent.parent;\n  }\n  return false;\n};\n\n/**\n    * Return name of the model file. This is usually the name of the first child of the root node.\n    * @returns {boolean} - true if the view is a master view false otherwise.\n    */\nBubbleNode.prototype.getModelName = function () {\n  var root = this.getRootNode();\n  var firstChild = root.children[0];\n  return firstChild.name();\n};\n\n/**\n    * Returns a string to uniquely identify a single model.\n    * @returns {string} - Unique model key.\n    */\nBubbleNode.prototype.getModelKey = function () {\n  // Note that we cannot simply use bubbleNode.guid(), because these are not really unique.\n  //\n  // TODO: Consider to just use Urn + viewableId here. The originModel had been recently added to fix problems with issues-ui\n  //       (https://git.autodesk.com/fluent/design-collaboration/pull/2528), which looked okay at first glance, because the manifests\n  //       are indeed different.\n  //       But: When switching between two shallow copies of the same model, this will mean we load (+consolidate) the same model twice.\n  // Added bubbleNode.guid() in order to support image files, that don't have viewableRootPath nor originalModel\n  var path = \"\".concat(this.getViewableRootPath()).concat(this.originModel).concat(this.guid());\n\n  // Eliminate potential encoding differences. Strictly speaking, we would need a more general url normalization here.\n  // But since the paths are all generated by code (and not user input), we don't expect much variation anyway.\n  return decodeURIComponent(path);\n};\n\n/* \n    * Reads a camera specification, which is stored as 12 floats in view nodes. \n    *  @param {number[]} params     - array of 12 floats\n    *  @param {Matrix4} [transform] - optional: transform applied to the camera\n    *  @returns {Object|null}       - camera object (see below)\n    * @static\n    */\nBubbleNode.readCameraFromArray = function (params, transform) {\n  if (!Array.isArray(params))\n  return null;\n\n  // Convert THREE.Vector3 and Object {x:Number y:Number z:Number} into a THREE.Matrix4\n  // for backwards compatibility.\n  // Can be removed in v8.0.0\n  if (transform && !transform.elements) {\n    var mat = new THREE.Matrix4();\n    mat.setPosition(transform);\n    transform = mat;\n  }\n\n  var camera = {\n    position: new THREE.Vector3(params[0], params[1], params[2]),\n    target: new THREE.Vector3(params[3], params[4], params[5]),\n    up: new THREE.Vector3(params[6], params[7], params[8]),\n    aspect: params[9],\n    fov: THREE.Math.radToDeg(params[10]),\n    orthoScale: params[11],\n    isPerspective: !params[12] };\n\n\n  // Apply the transform to the camera\n  if (transform) {\n    camera.position.applyMatrix4(transform);\n    camera.target.applyMatrix4(transform);\n    camera.up.transformDirection(transform);\n  }\n\n  //Ortho scale hack to fix incorrect ortho scale in Revit view parameters\n  //Weirdly, the position-target distance is correct here but when taking from the\n  //bubble parameters is the other way around.\n  //TODO: the reverse operation is done in viewer.impl.adjustOrthoCamera, perhaps we\n  //can remove both code blocks and still retain the same functionality in all code paths?\n  if (params[10] === 0 && params[11] === 1 && params[12] === 1) {\n    camera.orthoScale = camera.position.distanceTo(camera.target);\n  }\n\n  return camera;\n};\n\n/*\n    * Reads a matrix from 12 floats (upper-left 3x3-matrix + translation offset)\n    */\nBubbleNode.readMatrixFromArray12 = function (params) {\n  return new THREE.Matrix4().fromArray([\n  params[0], params[1], params[2], 0.0,\n  params[3], params[4], params[5], 0.0,\n  params[6], params[7], params[8], 0.0,\n  params[9], params[10], params[11], 1.0 // Note that the 1 is essential - otherwise multiplying with translations has no effect!\n  ]);\n};\n\n/** \n    * Returns source file's units.\n    * @returns {string} Source file's units.\n    */\nBubbleNode.prototype.getSourceFileUnits = function () {\n  return this.data.units;\n};\n// ACC-specific helpers to find master views in Revit Extractor derivatives\n\n// Master views from RevitExtractor are always located in a sub-folder name with fixed name.\nvar masterViewFolderName = '08f99ae5-b8be-4f8d-881b-128675723c10';\n\nBubbleNode.prototype.getMasterViews = function () {\n  var root = this.getRootNode();\n  var masterViewsBubble = root.search({ name: masterViewFolderName });\n  return masterViewsBubble && masterViewsBubble.length > 0 && masterViewsBubble[0].children || [];\n};\n\n// @returns {BubbleNode|null} - may be null if there is no master view for the given phaseName\nBubbleNode.prototype.getMasterView = function (phaseName) {\n  var masterViews = this.getMasterViews();\n  var masterView = masterViews.find(function (view) {return view.data.phaseNames === phaseName;});\n  return masterView;\n};\n\nBubbleNode.prototype.get3DModelNodes = function () {return this.search(BubbleNode.MODEL_NODE);};\nBubbleNode.prototype.getSheetNodes = function () {return this.search(BubbleNode.SHEET_NODE);};\n\n//BubbleNode search patterns for often used nodes (yes, they are confusing, hence pre-defined to\n//help you not go insane).\nBubbleNode.MODEL_NODE = { \"role\": \"3d\", \"type\": \"geometry\" };\nBubbleNode.GEOMETRY_SVF_NODE = { \"role\": \"graphics\", \"mime\": \"application/autodesk-svf\" };\nBubbleNode.SHEET_NODE = { \"role\": \"2d\", \"type\": \"geometry\" };\nBubbleNode.LEAFLET_NODE = { \"role\": \"leaflet\" };\nBubbleNode.PDF_PAGE_NODE = { \"role\": \"pdf-page\" };\nBubbleNode.IMAGE_NODE = { \"role\": \"image\" };\nBubbleNode.GEOMETRY_F2D_NODE = { \"role\": \"graphics\", \"mime\": \"application/autodesk-f2d\" };\nBubbleNode.VIEWABLE_NODE = { \"role\": \"viewable\" };\nBubbleNode.AEC_MODEL_DATA = { \"role\": \"Autodesk.AEC.ModelData\" };\nBubbleNode.MASTER_VIEW_NODE = { \"name\": \"08f99ae5-b8be-4f8d-881b-128675723c10\" };","\nexport function getGlobal() {\n  return typeof window !== \"undefined\" && window !== null ?\n  window :\n  typeof self !== \"undefined\" && self !== null ?\n  self :\n  global;\n}\n\nvar _window = getGlobal();\nvar _document = _window && _window.document;\n\nexport var isBrowser = typeof navigator !== \"undefined\";\n\nexport var isNodeJS = function isNodeJS() {\n  return !isBrowser;\n};\n\nexport var isIE11 = isBrowser && !!navigator.userAgent.match(/Edge|Trident\\/7\\./);\n\n// Although the naming is misleading, isIE11 contains Edge too for some legacy reason.\n// For backward compatibility, instead of renaming `isIE11` to `isIEOrEdge`, I just added `isIE11Only`.\nexport var isIE11Only = isBrowser && !!navigator.userAgent.match(/Trident\\/7\\./);\n\n// fix IE events\nif (typeof window !== \"undefined\" && isIE11) {\n  (function () {\n    function CustomEvent(event, params) {\n      params = params || { bubbles: false, cancelable: false, detail: undefined };\n      var evt = _document.createEvent('CustomEvent');\n      evt.initCustomEvent(event, params.bubbles, params.cancelable, params.detail);\n      return evt;\n    }\n\n    CustomEvent.prototype = _window.CustomEvent.prototype;\n\n    _window.CustomEvent = CustomEvent;\n  })();\n}\n\n// IE does not implement ArrayBuffer slice. Handy!\nif (!ArrayBuffer.prototype.slice) {\n  ArrayBuffer.prototype.slice = function (start, end) {\n    // Normalize start/end values\n    if (!end || end > this.byteLength) {\n      end = this.byteLength;\n    } else\n    if (end < 0) {\n      end = this.byteLength + end;\n      if (end < 0) end = 0;\n    }\n    if (start < 0) {\n      start = this.byteLength + start;\n      if (start < 0) start = 0;\n    }\n\n    if (end <= start) {\n      return new ArrayBuffer();\n    }\n\n    // Bytewise copy- this will not be fast, but what choice do we have?\n    var len = end - start;\n    var view = new Uint8Array(this, start, len);\n    var out = new Uint8Array(len);\n    for (var i = 0; i < len; i++) {\n      out[i] = view[i];\n    }\n    return out.buffer;\n  };\n}\n\n// IE doesn't implement Math.log2\n(function () {\n  Math.log2 = Math.log2 || function (x) {\n    return Math.log(x) / Math.LN2;\n  };\n})();\n\n//The BlobBuilder object\nif (typeof window !== \"undefined\")\n_window.BlobBuilder = _window.BlobBuilder || _window.WebKitBlobBuilder || _window.MozBlobBuilder || _window.MSBlobBuilder;\n\n\n// Launch full screen on the given element with the available method\nexport function launchFullscreen(element, options) {\n  if (element.requestFullscreen) {\n    element.requestFullscreen(options);\n  } else if (element.mozRequestFullScreen) {\n    element.mozRequestFullScreen(options);\n  } else if (element.webkitRequestFullscreen) {\n    element.webkitRequestFullscreen(options);\n  } else if (element.msRequestFullscreen) {\n    element.msRequestFullscreen(options);\n  }\n};\n\n// Exit full screen with the available method\nexport function exitFullscreen(_document) {\n  if (!inFullscreen(_document)) {\n    return;\n  }\n  if (_document.exitFullscreen) {\n    _document.exitFullscreen();\n  } else if (_document.mozCancelFullScreen) {\n    _document.mozCancelFullScreen();\n  } else if (_document.webkitExitFullscreen) {\n    _document.webkitExitFullscreen();\n  } else if (_document.msExitFullscreen) {\n    _document.msExitFullscreen();\n  }\n};\n\n// Determines if the browser is in full screen\nexport function inFullscreen(_document) {\n\n  // Special case for Ms-Edge that has webkitIsFullScreen with correct value\n  // and fullscreenEnabled with wrong value (thanks MS)\n\n  if (\"webkitIsFullScreen\" in _document) return !!_document.webkitIsFullScreen;\n  if (\"fullscreenElement\" in _document) return !!_document.fullscreenElement;\n  if (\"mozFullScreenElement\" in _document) return !!_document.mozFullScreenElement;\n  if (\"msFullscreenElement\" in _document) return !!_document.msFullscreenElement;\n\n  return !!_document.querySelector(\".viewer-fill-browser\"); // Fallback for iPad\n};\n\nexport function fullscreenElement(_document) {\n  return _document.fullscreenElement || _document.mozFullScreenElement || _document.webkitFullscreenElement || _document.msFullscreenElement;\n};\n\nexport function isFullscreenAvailable(element) {\n  return element.requestFullscreen || element.mozRequestFullScreen || element.webkitRequestFullscreen || element.msRequestFullscreen;\n};\n\n/**\n    * Returns true if full screen mode is enabled. \n    * @param {Document} _document\n    * @return {Boolean} - true if full screen mode is enabled false otherwise.\n    */\nexport function isFullscreenEnabled(_document) {\n  return (\n    _document.fullscreenEnabled ||\n    _document.webkitFullscreenEnabled ||\n    _document.mozFullScreenEnabled ||\n    _document.msFullscreenEnabled);\n\n}\n\n// Get the version of the android device through user agent.\n// Return the version string of android device, e.g. 4.4, 5.0...\nexport function getAndroidVersion(ua) {\n  ua = ua || navigator.userAgent;\n  var match = ua.match(/Android\\s([0-9\\.]*)/);\n  return match ? match[1] : false;\n};\n\n// Determine if this is a touch or notouch device.\nexport function isTouchDevice() {\n  /*\n                                 // Temporarily disable touch support through hammer on Android 5, to debug\n                                 // some specific gesture issue with Chromium WebView when loading viewer3D.js.\n                                 if (parseInt(getAndroidVersion()) == 5) {\n                                     return false;\n                                 }\n                                 */\n\n  return typeof window !== 'undefined' && ('ontouchstart' in window || navigator.maxTouchPoints > 0);\n};\n\n// Since iOS 13, the iPad identifies itself as a desktop, so the only way to reliably detect is to search for multitouch capabilities\n// (insofar as no other Apple device implements it)\nvar _isIOSDevice = isBrowser && (/ip(ad|hone|od)/.test(navigator.userAgent.toLowerCase()) || navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1);\nexport function isIOSDevice() {\n  return _isIOSDevice;\n}\n\nvar _isAndroidDevice = isBrowser && navigator.userAgent.toLowerCase().indexOf('android') !== -1;\nexport function isAndroidDevice() {\n  return _isAndroidDevice;\n}\n\nexport function isMobileDevice() {\n  if (!isBrowser) return false;\n  return isIOSDevice() || isAndroidDevice();\n};\n\nexport function isPhoneFormFactor() {\n  return (\n    isMobileDevice() && (\n    _window.matchMedia('(max-width: 750px)').matches || _window.matchMedia('(max-height: 750px)').matches));\n\n}\n\nexport function isSafari() {\n  if (!isBrowser) return false;\n  var _ua = navigator.userAgent.toLowerCase();\n  return _ua.indexOf(\"safari\") !== -1 && _ua.indexOf(\"chrome\") === -1;\n};\n\nexport function isFirefox() {\n  if (!isBrowser) return false;\n  var _ua = navigator.userAgent.toLowerCase();\n  return _ua.indexOf(\"firefox\") !== -1;\n};\n\nexport function isChrome() {\n  if (!isBrowser) return false;\n  var _ua = navigator.userAgent.toLowerCase();\n  return _ua.indexOf(\"chrome\") !== -1;\n};\n\nexport function isMac() {\n  if (!isBrowser) return false;\n  var _ua = navigator.userAgent.toLowerCase();\n  return _ua.indexOf(\"mac os\") !== -1;\n};\n\nexport function isWindows() {\n  if (!isBrowser) return false;\n  var _ua = navigator.userAgent.toLowerCase();\n  return _ua.indexOf(\"win32\") !== -1 || _ua.indexOf(\"windows\") !== -1;\n};\n\nexport function ObjectAssign(des, src) {\n  for (var key in src) {\n    if (src.hasOwnProperty(key))\n    des[key] = src[key];\n  }\n  return des;\n};\n\n// Hack to work around Safari's use of pinch and pan inside the viewer canvas.\nfunction disableTouchSafari(event) {\n  var xOff = _window.hasOwnProperty(\"pageXOffset\") ? _window.pageXOffset : _document.documentElement.scrollLeft;\n  var yOff = _window.hasOwnProperty(\"pageYOffset\") ? _window.pageYOffset : _document.documentElement.scrollTop;\n\n  // event.pageX and event.pageY returned undefined through Chrome console device mode\n  var pageX = typeof event.pageX === \"undefined\" ? event.changedTouches[0].pageX : event.pageX;\n  var pageY = typeof event.pageY === \"undefined\" ? event.changedTouches[0].pageY : event.pageY;\n\n  // If we aren't inside the canvas, then allow default propagation of the event\n  var element = _document.elementFromPoint(pageX - xOff, pageY - yOff);\n  if (!element || element.nodeName !== 'CANVAS')\n  return true;\n  // If it's a CANVAS, check that it's owned by us\n  if (element.getAttribute('data-viewer-canvas') !== 'true')\n  return true;\n  // Inside the canvas, prevent the event from propagating to Safari'safely\n  // standard handlers, which will pan and zoom the page.\n  event.preventDefault();\n  return false;\n}\n\n// Hack to work around Safari's use of pinch and pan inside the viewer canvas.\nexport function disableDocumentTouchSafari() {\n  if (isMobileDevice() && isSafari()) {\n    // Safari mobile disable default touch handling inside viewer canvas\n    // Use capture to make sure Safari doesn't capture the touches and prevent\n    // us from disabling them.\n    _document.documentElement.addEventListener('touchstart', disableTouchSafari, true);\n    _document.documentElement.addEventListener('touchmove', disableTouchSafari, true);\n    _document.documentElement.addEventListener('touchcanceled', disableTouchSafari, true);\n    _document.documentElement.addEventListener('touchend', disableTouchSafari, true);\n  }\n};\n\n// Hack to work around Safari's use of pinch and pan inside the viewer canvas.\n// This method is not being invoked explicitly.\nexport function enableDocumentTouchSafari() {\n  if (isMobileDevice() && isSafari()) {\n    // Safari mobile disable default touch handling inside viewer canvas\n    // Use capture to make sure Safari doesn't capture the touches and prevent\n    // us from disabling them.\n    _document.documentElement.removeEventListener('touchstart', disableTouchSafari, true);\n    _document.documentElement.removeEventListener('touchmove', disableTouchSafari, true);\n    _document.documentElement.removeEventListener('touchcanceled', disableTouchSafari, true);\n    _document.documentElement.removeEventListener('touchend', disableTouchSafari, true);\n  }\n};\n\n\n// Convert touchstart event to click to remove the delay between the touch and\n// the click event which is sent after touchstart with about 300ms deley.\n// Should be used in UI elements on touch devices.\nexport function touchStartToClick(e) {\n  // Buttons that activate fullscreen are a special case. The HTML5 fullscreen spec\n  // requires the original user gesture signal to avoid a security issue.  See LMV-2396 and LMV-2326\n  if (e.target.className && (e.target.className.indexOf(\"fullscreen\") > -1 || e.target.className.indexOf(\"webvr\") > -1))\n  return;\n  e.preventDefault(); // Stops the firing of delayed click event.\n  e.stopPropagation();\n  e.target.click(); // Maps to immediate click.\n}\n\n//Safari doesn't have the Performance object\n//We only need the now() function, so that's easy to emulate.\n(function () {\n  var global = getGlobal();\n  if (!global.performance)\n  global.performance = Date;\n})();\n\n// Polyfill for IE and Safari\n// https://developer.mozilla.org/de/docs/Web/JavaScript/Reference/Global_Objects/Number/isInteger\nNumber.isInteger = Number.isInteger || function (value) {\n  return typeof value === \"number\" &&\n  isFinite(value) &&\n  Math.floor(value) === value;\n};\n\n// Polyfill for IE\nString.prototype.repeat = String.prototype.repeat || function (count) {\n  if (count < 1) return '';\n  var result = '',pattern = this.valueOf();\n  while (count > 1) {\n    if (count & 1) result += pattern;\n    count >>= 1, pattern += pattern;\n  }\n  return result + pattern;\n};\n\n// Polyfill for IE\n// https://github.com/jonathantneal/array-flat-polyfill/blob/master/src/polyfill-flat.js\nif (!Array.prototype.flat) {\n  Object.defineProperty(Array.prototype, 'flat', {\n    value: function flat() {\n      var depth = isNaN(arguments[0]) ? 1 : Number(arguments[0]);\n\n      return depth ? Array.prototype.reduce.call(this, function (acc, cur) {\n        if (Array.isArray(cur)) {\n          acc.push.apply(acc, flat.call(cur, depth - 1));\n        } else {\n          acc.push(cur);\n        }\n\n        return acc;\n      }, []) : Array.prototype.slice.call(this);\n    } });\n\n}\n\n// Polyfill for IE\n// It doesn't support negative values for start and end; it complicates the code using this function.\nif (!Array.prototype.fill) {\n  Object.defineProperty(Array.prototype, \"fill\", {\n    enumerable: false,\n    value: function value(_value, start, end) {\n      start = start === undefined ? 0 : start;\n      end = end === undefined ? this.length : end;\n      for (var i = start; i < end; ++i) {\n        this[i] = _value;}\n    } });\n\n}\n// Polyfill for IE\nInt32Array.prototype.lastIndexOf = Int32Array.prototype.lastIndexOf || function (searchElement, fromIndex) {\n  return Array.prototype.lastIndexOf.call(this, searchElement, fromIndex);\n};\n\n// Polyfill for IE\n// It doesn't support negative values for start and end; it complicates the code using this function.\nif (!Array.prototype.find) {\n  Object.defineProperty(Array.prototype, \"find\", {\n    enumerable: false,\n    value: function value(callback, _this) {\n      var len = this.length;\n      for (var i = 0; i < len; ++i) {\n        var item = this[i];\n        if (callback.call(_this, item, i, this))\n        return item;\n      }\n      return undefined;\n    } });\n\n}\n\n// Polyfill for IE\nif (typeof Object.assign != 'function') {\n  // Must be writable: true, enumerable: false, configurable: true\n  Object.defineProperty(Object, \"assign\", {\n    value: function assign(target, varArgs) {// .length of function is 2\n      'use strict';\n      if (target == null) {// TypeError if undefined or null\n        throw new TypeError('Cannot convert undefined or null to object');\n      }\n\n      var to = Object(target);\n\n      for (var index = 1; index < arguments.length; index++) {\n        var nextSource = arguments[index];\n\n        if (nextSource != null) {// Skip over if undefined or null\n          for (var nextKey in nextSource) {\n            // Avoid bugs when hasOwnProperty is shadowed\n            if (Object.prototype.hasOwnProperty.call(nextSource, nextKey)) {\n              to[nextKey] = nextSource[nextKey];\n            }\n          }\n        }\n      }\n      return to;\n    },\n    writable: true,\n    configurable: true });\n\n}\n\n// Polyfill for IE and iOS devices\nif (typeof window !== \"undefined\" && (isIE11 || isIOSDevice()) && !HTMLCanvasElement.prototype.toBlob) {\n  Object.defineProperty(HTMLCanvasElement.prototype, 'toBlob', {\n    value: function value(callback, type, quality) {\n      var canvas = this;\n      setTimeout(function () {\n\n        var binStr = atob(canvas.toDataURL(type, quality).split(',')[1]),\n        len = binStr.length,\n        arr = new Uint8Array(len);\n\n        for (var i = 0; i < len; i++) {\n          arr[i] = binStr.charCodeAt(i);\n        }\n\n        callback(new Blob([arr], { type: type || 'image/png' }));\n\n      });\n    } });\n\n}\n\n// Polyfill for IE (LMV-3823)\nif (!Uint8Array.prototype.slice) {\n\n  // This will work for genuine arrays, array-like objects, \n  // NamedNodeMap (attributes, entities, notations),\n  // NodeList (e.g., getElementsByTagName), HTMLCollection (e.g., childNodes),\n  // and will not fail on other DOM objects (as do DOM elements in IE < 9)\n  Uint8Array.prototype.slice = function (begin, end) {\n    // IE < 9 gets unhappy with an undefined end argument\n    end = typeof end !== 'undefined' ? end : this.length;\n\n    // For native Array objects, we use the native slice function\n    if (Object.prototype.toString.call(this) === '[object Array]') {\n      return _slice.call(this, begin, end);\n    }\n\n    // For array like object we handle it ourselves.\n    var i,cloned = [],\n    size,len = this.length;\n\n    // Handle negative value for \"begin\"\n    var start = begin || 0;\n    start = start >= 0 ? start : Math.max(0, len + start);\n\n    // Handle negative value for \"end\"\n    var upTo = typeof end == 'number' ? Math.min(end, len) : len;\n    if (end < 0) {\n      upTo = len + end;\n    }\n\n    // Actual expected size of the slice\n    size = upTo - start;\n\n    if (size > 0) {\n      cloned = new Array(size);\n      if (this.charAt) {\n        for (i = 0; i < size; i++) {\n          cloned[i] = this.charAt(start + i);\n        }\n      } else {\n        for (i = 0; i < size; i++) {\n          cloned[i] = this[start + i];\n        }\n      }\n    }\n\n    return cloned;\n  };\n}","\nimport { getParameterByName, getScript, getParameterByNameFromPath } from \"./globals\";\nimport { theResourceLoader } from \"./resource-loader\";\nimport { logger } from \"./logger/Logger\";\nimport { endpoint, setEnv, getEnv, setOfflineResourcePrefix, setOffline } from \"./file-loaders/net/endpoints\";\nimport { getGlobal, isNodeJS, disableDocumentTouchSafari } from \"./compat\";\nimport { initWorkerScript } from \"./file-loaders/main/WorkerCreator\";\nimport { ViewingService } from \"./file-loaders/net/Xhr\";\nimport { initializeLocalization } from \"./globalization/i18init\";\nimport { analytics } from './analytics';\n\nvar global = getGlobal();\nvar _window = global;\n\nvar _token = {\n  accessToken: null,\n  getAccessToken: null,\n  tokenRefreshInterval: null };\n\n\nexport var token = _token;\n\nvar WEBGL_HELP_LINK = null;\nexport function getWebGLHelpLink() {\n  return WEBGL_HELP_LINK;\n}\n\n\nvar LmvEndpoints = {\n  local: {\n    RTC: ['https://rtc-dev.api.autodesk.com:443', 'https://lmv.autodesk.com:443'] //port # is required here.\n  },\n  dev: {\n    RTC: ['https://rtc-dev.api.autodesk.com:443', 'https://lmv.autodesk.com:443'] },\n\n  stg: {\n    RTC: ['https://rtc-stg.api.autodesk.com:443', 'https://lmv.autodesk.com:443'] },\n\n  prod: {\n    RTC: ['https://rtc.api.autodesk.com:443', 'https://lmv.autodesk.com:443'] } };\n\n\n\nvar currentHost = \"\";\nif (getGlobal().location) {\n  var location = getGlobal().location;\n  currentHost = location.protocol + \"//\" + location.host;\n}\n\nvar DevApiUrls = {\n  local: \"\",\n  dev: \"https://developer-dev.api.autodesk.com\",\n  stg: \"https://developer-stg.api.autodesk.com\",\n  prod: \"https://developer.api.autodesk.com\" };\n\n\nvar FluentApiUrls = {\n  dev: \"https://us.otgs-dev.autodesk.com\",\n  stg: \"https://us.otgs-stg.autodesk.com\",\n  prod: \"https://us.otgs.autodesk.com\",\n  stg_eu: \"https://eu.otgs-stg.autodesk.com\",\n  prod_eu: \"https://eu.otgs.autodesk.com\" };\n\n\nvar D3SUrls = {\n  dev_us_http: \"https://cdn-dev.derivative.autodesk.com\",\n  dev_eu_http: \"https://cdn-dev.derivative.autodesk.com/regions/eu\",\n  dev_us_ws: \"https://cdn-dev.derivative.autodesk.com/cdnws\",\n  dev_eu_ws: \"https://cdn-dev.derivative.autodesk.com/regions/eu/cdnws\",\n  stg_us_http: \"https://cdn-stg.derivative.autodesk.com\",\n  stg_eu_http: \"https://cdn-stg.derivative.autodesk.com/regions/eu\",\n  stg_us_ws: \"https://cdn-stg.derivative.autodesk.com/cdnws\",\n  stg_eu_ws: \"https://cdn-stg.derivative.autodesk.com/regions/eu/cdnws\",\n  prod_us_http: \"https://cdn.derivative.autodesk.com\",\n  prod_eu_http: \"https://cdn.derivative.autodesk.com/regions/eu\",\n  prod_us_ws: \"https://cdn.derivative.autodesk.com/cdnws\",\n  prod_eu_ws: \"https://cdn.derivative.autodesk.com/regions/eu/cdnws\" };\n\n\nvar DerivativeApiData = {\n  v2: \"derivativeV2\",\n  v2_eu: \"derivativeV2_EU\" };\n\n\nexport var EnvironmentConfigurations = {\n  Local: {\n    ROOT: '',\n    LMV: LmvEndpoints[\"local\"] },\n\n  Development: {\n    ROOT: DevApiUrls[\"dev\"],\n    LMV: LmvEndpoints[\"dev\"],\n    bubbleManifest: true },\n\n  Staging: {\n    ROOT: DevApiUrls[\"stg\"],\n    LMV: LmvEndpoints[\"stg\"],\n    bubbleManifest: true },\n\n  Production: {\n    ROOT: DevApiUrls[\"prod\"],\n    LMV: LmvEndpoints[\"prod\"],\n    bubbleManifest: true },\n\n  AutodeskDevelopment: {\n    ROOT: DevApiUrls[\"dev\"],\n    LMV: LmvEndpoints[\"dev\"] },\n\n  AutodeskStaging: {\n    ROOT: DevApiUrls[\"stg\"],\n    LMV: LmvEndpoints[\"stg\"] },\n\n  AutodeskProduction: {\n    ROOT: DevApiUrls[\"prod\"],\n    LMV: LmvEndpoints[\"prod\"] },\n\n  FluentLocal: {\n    ROOT: currentHost,\n    LMV: currentHost },\n\n  FluentDev: {\n    ROOT: FluentApiUrls[\"dev\"],\n    LMV: LmvEndpoints[\"dev\"],\n    UPSTREAM: DevApiUrls[\"stg\"],\n    UPSTREAM_API_DATA: DerivativeApiData[\"v2\"] },\n\n  FluentStaging: {\n    ROOT: FluentApiUrls[\"stg\"],\n    LMV: LmvEndpoints[\"stg\"],\n    UPSTREAM: DevApiUrls[\"stg\"],\n    UPSTREAM_API_DATA: DerivativeApiData[\"v2\"] },\n\n  FluentProduction: {\n    ROOT: FluentApiUrls[\"prod\"],\n    LMV: LmvEndpoints[\"prod\"],\n    UPSTREAM: DevApiUrls[\"prod\"],\n    UPSTREAM_API_DATA: DerivativeApiData[\"v2\"] },\n\n  FluentStagingEU: {\n    ROOT: FluentApiUrls[\"stg_eu\"],\n    LMV: LmvEndpoints[\"stg\"],\n    UPSTREAM: DevApiUrls[\"stg\"],\n    UPSTREAM_API_DATA: DerivativeApiData[\"v2_eu\"] },\n\n  FluentProductionEU: {\n    ROOT: FluentApiUrls[\"prod_eu\"],\n    LMV: LmvEndpoints[\"prod\"],\n    UPSTREAM: DevApiUrls[\"prod\"],\n    UPSTREAM_API_DATA: DerivativeApiData[\"v2_eu\"] },\n\n  MD20DevUS: {\n    ROOT: D3SUrls[\"dev_us_http\"],\n    LMV: LmvEndpoints[\"dev\"],\n    UPSTREAM: DevApiUrls[\"dev\"],\n    UPSTREAM_API_DATA: DerivativeApiData[\"v2\"] },\n\n  MD20DevEU: {\n    ROOT: D3SUrls[\"dev_eu_http\"],\n    LMV: LmvEndpoints[\"dev\"],\n    UPSTREAM: DevApiUrls[\"dev\"],\n    UPSTREAM_API_DATA: DerivativeApiData[\"v2_eu\"] },\n\n  MD20StgUS: {\n    ROOT: D3SUrls[\"stg_us_http\"],\n    LMV: LmvEndpoints[\"stg\"],\n    UPSTREAM: DevApiUrls[\"stg\"],\n    UPSTREAM_API_DATA: DerivativeApiData[\"v2\"] },\n\n  MD20StgEU: {\n    ROOT: D3SUrls[\"stg_eu_http\"],\n    LMV: LmvEndpoints[\"stg\"],\n    UPSTREAM: DevApiUrls[\"stg\"],\n    UPSTREAM_API_DATA: DerivativeApiData[\"v2_eu\"] },\n\n  MD20ProdUS: {\n    ROOT: D3SUrls[\"prod_us_http\"],\n    LMV: LmvEndpoints[\"prod\"],\n    UPSTREAM: DevApiUrls[\"prod\"],\n    UPSTREAM_API_DATA: DerivativeApiData[\"v2\"] },\n\n  MD20ProdEU: {\n    ROOT: D3SUrls[\"prod_eu_http\"],\n    LMV: LmvEndpoints[\"prod\"],\n    UPSTREAM: DevApiUrls[\"prod\"],\n    UPSTREAM_API_DATA: DerivativeApiData[\"v2_eu\"] } };\n\n\n\nexport function initializeEnvironmentVariable(options) {\n  var env;\n\n  // Use the enviroment that was explicitly specified.\n  //\n  if (options && options.env) {\n    env = options.env;\n  }\n\n  // If not available, check if the environment was specified in the query parameters.\n  //\n  if (!env) {\n    env = getParameterByName(\"env\");\n  }\n\n  setOfflineResourcePrefix(options && options.offlineResourcePrefix || \"\");\n\n  setOffline(options && options.offline === \"true\");\n\n  // If still not available, try to resolve the environment based on the url.\n  //\n  if (!env) {\n    switch (_window.location.hostname) {\n      case \"developer-dev.api.autodesk.com\":\n        env = 'AutodeskDevelopment';\n        break;\n      case \"developer-stg.api.autodesk.com\":\n        env = 'AutodeskStaging';\n        break;\n      case \"developer.api.autodesk.com\":\n        env = 'AutodeskProduction';\n        break;\n\n      case \"localhost.autodesk.com\":\n        env = 'Local';\n        break;\n      case \"\": // IP addresses on Chrome.\n        env = 'Local';\n        break;\n      case \"127.0.0.1\":\n        env = 'Local';\n        break;\n      default:\n        env = 'AutodeskProduction';}\n\n  }\n\n  setEnv(env);\n\n  if (typeof window !== \"undefined\") {\n    logger.info(\"Host name : \" + window.location.hostname);\n  }\n  logger.info(\"Environment initialized as : \" + env);\n};\n\nexport function initializeResourceRoot(options) {\n  //Derive the root for static viewer resources based on the\n  //location of the main viewer script\n  var libList = [\n  \"viewer3D.js\",\n  \"viewer3D.min.js\",\n  \"viewerCE.js\",\n  \"viewerCE.min.js\"];\n\n  if (options && options.hasOwnProperty('libraryName'))\n  libList.push(options.libraryName);\n\n  var root;\n  var scriptUrl;\n  var hasVersionInURL = false;\n\n  // TODO_NOP: this doesn't work for Polymer / Web Components\n  for (var i = 0; i < libList.length; i++) {\n    var script = getScript(libList[i]);\n    scriptUrl = script ? script.src : \"\";\n    var idx = scriptUrl.indexOf(libList[i]);\n    if (idx >= 0) {\n      root = scriptUrl.substr(0, idx);\n      if (scriptUrl.indexOf('&v=', idx) > 0 || scriptUrl.indexOf('?v=', idx) > 0) {\n        hasVersionInURL = true;\n      }\n      break;\n    }\n  }\n\n  global.LMV_RESOURCE_ROOT = root || global.LMV_RESOURCE_ROOT;\n\n  // Transfer version from URL-param into viewer/path/ now that Forge supports it.\n  if (hasVersionInURL) {\n\n    // However, only do this when the viewer code is being downloaded from Forge CDN\n    var patchResourceRoot = false;\n    var checkEnvs = ['dev', 'stg', 'prod'];\n    for (var i = 0; i < checkEnvs.length; ++i) {\n      var theEnv = DevApiUrls[checkEnvs[i]];\n      if (global.LMV_RESOURCE_ROOT.indexOf(theEnv) !== -1) {\n        patchResourceRoot = true;\n        break;\n      }\n    }\n\n    if (patchResourceRoot) {\n      // Embed the version into the base URL.\n      global.LMV_RESOURCE_ROOT += global.LMV_VIEWER_VERSION + '/';\n    }\n  }\n}\n\nexport function initializeServiceEndPoints(options) {\n\n  // Get endpoint.\n  var endp = options.endpoint;\n  if (!endp) {\n    var config = EnvironmentConfigurations[getEnv()];\n    endp = config['ROOT'];\n  }\n\n  // Get endpoint api.\n  var api = options.api || endp.ENDPOINT_API_DERIVATIVE_SERVICE_V2;\n\n  endpoint.setEndpointAndApi(endp, api);\n\n  if (isNodeJS())\n  return; // No need for Promise\n\n  initializeResourceRoot(options);\n\n  return Promise.resolve();\n}\n\n\n//By now, the use of cookie is Fluent-specific only\nexport function refreshCookie(token, onSuccess, onError) {\n\n  // rawGet doesn't accept undefined onSuccess callbacks\n  onSuccess = onSuccess || function () {};\n  ViewingService.rawGet(endpoint.getApiEndpoint(), null, \"/auth/settoken\", onSuccess, onError,\n  {\n    method: \"POST\",\n    headers: {\n      \"Content-Type\": \"application/x-www-form-urlencoded\" },\n\n    withCredentials: true,\n    postData: \"access-token=\" + token });\n\n\n}\n\n// Refresh the token in request header, in case that the third party cookie is disabled\nexport function refreshRequestHeader(token) {\n\n  endpoint.HTTP_REQUEST_HEADERS[\"Authorization\"] = \"Bearer \" + token;\n\n}\n\nexport function refreshToken(in_tokenStr, onSuccess, onError) {\n\n  // Store the token, it will be used when third-party cookies are disabled\n  _token.accessToken = in_tokenStr;\n\n  //TODO: Fluent. Currently we need to use the cookie based approach,\n  //until the server is fixed to respond to CORS pre-flight requests\n  //with Authorization header.\n  // At the beginning, try to store the token in cookie\n  if (endpoint.getUseCookie()) {\n\n    var wrapError = function wrapError(e) {\n      logger.warn(\"Failed to set token in cookie. Will use header instead.\");\n      endpoint.setUseCookie(false);\n      refreshRequestHeader(in_tokenStr);\n      onError && onError(e);\n    };\n\n    refreshCookie(in_tokenStr, onSuccess, wrapError);\n  } else {\n    refreshRequestHeader(in_tokenStr);\n    onSuccess && onSuccess();\n  }\n}\n\nfunction initializeAuthPromise(options) {\n  return new Promise(function (resolve) {\n    initializeAuth(resolve, options);\n  });\n}\n\nexport function initializeAuth(onSuccessCallback, options) {\n\n  var shouldInitializeAuth = options ? options.shouldInitializeAuth : undefined;\n  if (shouldInitializeAuth === undefined) {\n    var p = getParameterByName(\"auth\");\n    shouldInitializeAuth = p.toLowerCase() !== \"false\";\n  }\n\n  //Skip Auth in case we are serving the viewer locally\n  if (getEnv() == \"Local\" || !shouldInitializeAuth) {\n    setTimeout(onSuccessCallback, 0);\n    endpoint.setUseCredentials(typeof options.useCredentials !== \"undefined\" ? options.useCredentials : false);\n    return;\n  }\n\n  endpoint.setUseCredentials(typeof options.useCredentials !== \"undefined\" ? options.useCredentials : true);\n  endpoint.setUseCookie(options.useCookie);\n\n  //Must zero this out every time the initializer is called -- which could happen\n  //several times with the same globally loaded LMV script/module\n  if (_token.tokenRefreshInterval) {\n    clearTimeout(_token.tokenRefreshInterval);\n    _token.tokenRefreshInterval = null;\n  }\n\n  var accessToken;\n\n  function onGetAccessToken(token /* access token value. */, expire /* expire time, in seconds. */) {\n    accessToken = token;\n\n    var isFirstTimeInit = !_token.tokenRefreshInterval;\n\n    if (!isFirstTimeInit) {\n      refreshToken(accessToken);\n    } else {\n      //The goal of onSuccessCallback is to continue viewer initialization.\n      //In case refreshToken fails, we don't really want to block viewer initialization\n      //(in order to be able to display error messages later on, or retry the token refresh, etc.)\n      //This is why we use the same callback regardless of result.\n      refreshToken(accessToken, onSuccessCallback, onSuccessCallback);\n    }\n\n    if (typeof expire !== \"number\")\n    expire = 3599;\n\n    var tokenExpirationBuffer = (options === null || options === void 0 ? void 0 : options.tokenExpirationBuffer) || 5; // Refresh 5 seconds before token expire.\n    var interval = expire - tokenExpirationBuffer;\n    if (interval <= 0) {\n      // We can't get a precise upper bound if the token is such a short lived one (expire in a minute),\n      // so just use the original one.\n      interval = expire;\n    }\n\n    _token.tokenRefreshInterval = setTimeout(function () {options.getAccessToken(onGetAccessToken);}, interval * 1000);\n  }\n\n  if (options && options.getAccessToken) {\n    _token.getAccessToken = options.getAccessToken;\n\n    accessToken = options.getAccessToken(onGetAccessToken);\n\n    //Backwards compatibility with the old synchronous API\n    if (typeof accessToken === \"string\" && accessToken) {\n      refreshToken(accessToken, onSuccessCallback);\n    }\n\n  } else if (options && options.accessToken) {\n    accessToken = options.accessToken;\n    refreshToken(accessToken, onSuccessCallback);\n  } else {\n    accessToken = getParameterByName(\"accessToken\");\n    if (!accessToken) {\n      logger.error(\"No access token is provided, but authorization requested. This is a problem.\");\n    }\n    refreshToken(accessToken, onSuccessCallback);\n  }\n\n}\n\nexport function initializeLogger(options) {\n\n  logger.initialize(options);\n\n  var logLevel = getParameterByName(\"logLevel\");\n  if (logLevel) {\n    logger.setLevel(parseInt(logLevel));\n  }\n}\n\nfunction initializeCDN(options) {\n\n  if (options && options.env === 'Local')\n  return;\n\n  if (!endpoint.getCdnRedirectUrl())\n  return;\n\n  ViewingService.rawGet(endpoint.getCdnRedirectUrl(), null, null,\n  function onSuccess(res) {\n    if (res && res.length) {\n      endpoint.setCdnUrl(res);\n      logger.info(\"CDN_ROOT is: \" + res);\n    }\n  },\n  function onError() {\n  },\n  {\n    withCredentials: false,\n    responseType: \"text\" });\n\n\n}\n\n/**\r\n   * Static method for initializing the viewer runtime. Models must be loaded after this\r\n   * step is completed.\r\n   *\r\n   * Includes:\r\n   *  - End points of cloud services the viewer uses, like Model Derivative\r\n   *  - Authentication and authorization cookie settings on the client side\r\n   *  - Misc runtime environment variables and global viewer configurations parameters\r\n   *\r\n   * @alias Autodesk.Viewing#Initializer\r\n   *\r\n   * @param {object} options - The options object contains configuration parameters used to do initializations. If no\r\n   * access token or authentication callback is provided, the Initializer will fall back\r\n   * on an access token provided in the URL query string, or a previous access token stored in\r\n   * the cookie cache, if available.\r\n   * @param {string} [options.env] - Either \"AutodeskProduction\", \"AutodeskStaging\", or \"AutodeskDevelopment\". \r\n   * \"Local\" can be used to avoid attaching athentication headers to XHR requests.\r\n   * @param {string} [options.api] - \"modelDerivativeV2\" or \"derivativeV2\" for US data center,\r\n   * or use \"derivativeV2_EU\" for European data center.\r\n   * @param {function} [options.getAccessToken] - An function that provides an access token asynchronously.\r\n   * The function signature is `getAccessToken(onSuccess)`, where onSuccess is a callback that getAccessToken\r\n   * function should invoke when a token is granted, with the token being the first input parameter for the\r\n   * onSuccess function, and the token expire time (in seconds) being the second input parameter for the\r\n   * function. Viewer relies on both getAccessToken and the expire time to automatically renew token, so\r\n   * it is critical that getAccessToken must be implemented as described here.\r\n   * @param {string} [options.accessToken] - An access token. Not needed when `options.getAccessToken` is provided.`\r\n   * @param {string} [options.webGLHelpLink] - A link to a help page on webGL if it's disabled.\r\n   * @param {string} [options.language] - Preferred language code as defined in RFC 4646, such as \"en\", \"de\", \"fr\", etc.\r\n   * If no language is set, viewer will pick it up from the browser. If language is not as defined in RFC,\r\n   * viewer will fall back to \"en\" (English) but the behavior is undefined.\r\n   * @param {function} callback - A method the client executes when initialization is finished.\r\n   *\r\n   * @example\r\n   *  var options = {\r\n   *     env: \"AutodeskProduction\",\r\n   *     language: \"en\",\r\n   *     getAccessToken: function(onSuccess) {\r\n   *         // TODO: Get actual forge token and expiration time.\r\n   *         var accessToken = 'your_access_token';\r\n   *         var expirationTimeSeconds = 5 * 60; // 5 minutes\r\n   *         onSuccess(accessToken, expirationTimeSeconds);\r\n   *     }\r\n   *  };\r\n   *  var myCallback = function() {\r\n   *     console.log(\"initialization complete, creating the viewer...\");\r\n   *  };\r\n   *  Autodesk.Viewing.Initializer(options, myCallback);\r\n   *\r\n   */\nexport function Initializer(options, callback) {\n\n  if (isNodeJS()) {\n\n    initializeEnvironmentVariable(options);\n    initializeServiceEndPoints(options);\n    initializeLogger(options);\n    initializeCDN(options);\n    initializeAuth(callback, options);\n    return;\n  }\n\n  // Web //\n  if (options.webGLHelpLink)\n  WEBGL_HELP_LINK = options.webGLHelpLink;\n\n  initializeEnvironmentVariable(options);\n  var apiProm = initializeServiceEndPoints(options);\n  initializeLogger(options);\n  initializeCDN(options);\n  initializeLocalization(options);\n  disableDocumentTouchSafari();\n\n  var productId = options.productId ? options.productId : getEnv() === \"Local\" ? \"Local\" : \"NOT_SET\";\n\n  analytics.setSuperProps({\n    productId: productId,\n    lmvBuildType: global.LMV_BUILD_TYPE,\n    lmvViewerVersion: global.LMV_VIEWER_VERSION });\n\n\n  if (!options.optOutTrackingByDefault && !BUILD_FLAG__FLUENT_PROFILE) {\n    analytics.register('all');\n  }\n\n  //Kick off a request for the web worker script\n  initWorkerScript();\n\n  var authProm = initializeAuthPromise(options);\n\n  Promise.all([apiProm, authProm]).then(callback);\n}\n\n/**\r\n   * Counterpart to {@link Autodesk.Viewing.Initializer}, use it to free up memory.\r\n   * Developers need to uninitialize all {@link Autodesk.Viewing.Viewer3D} instances before invoking this function.\r\n   *\r\n   * @alias Autodesk.Viewing#shutdown\r\n   */\nexport function shutdown() {\n\n  logger.shutdown();\n\n  Autodesk.Viewing.Private.shutdownPropWorker();\n\n}","import { utf8ArrayToString } from './StringUtils';\n\n\"use strict\";\n\n//We will use these shared memory arrays to\n//convert from bytes to the desired data type.\nvar convBuf = new ArrayBuffer(8);\nvar convUint8 = new Uint8Array(convBuf);\nvar convUint16 = new Uint16Array(convBuf);\nvar convInt32 = new Int32Array(convBuf);\nvar convUint32 = new Uint32Array(convBuf);\nvar convFloat32 = new Float32Array(convBuf);\nvar convFloat64 = new Float64Array(convBuf);\n\n\n/** @constructor */\nexport function InputStream(buf) {\n  this.buffer = buf;\n  this.offset = 0;\n  this.byteLength = buf.length;\n}\n\n\nInputStream.prototype.seek = function (off) {\n  this.offset = off;\n};\n\nInputStream.prototype.getBytes = function (len) {\n  var ret = new Uint8Array(this.buffer.buffer, this.offset, len);\n  this.offset += len;\n  return ret;\n};\n\nInputStream.prototype.getVarints = function () {\n  var b;\n  var value = 0;\n  var shiftBy = 0;\n  do {\n    b = this.buffer[this.offset++];\n    value |= (b & 0x7f) << shiftBy;\n    shiftBy += 7;\n  } while (b & 0x80);\n  return value;\n};\n\nInputStream.prototype.getUint8 = function () {\n  return this.buffer[this.offset++];\n};\n\nInputStream.prototype.getUint16 = function () {\n  convUint8[0] = this.buffer[this.offset++];\n  convUint8[1] = this.buffer[this.offset++];\n  return convUint16[0];\n};\n\nInputStream.prototype.getInt16 = function () {\n  var tmp = this.getUint16();\n  //make negative integer if the ushort is negative\n  if (tmp > 0x7fff)\n  tmp = tmp | 0xffff0000;\n  return tmp;\n};\n\nInputStream.prototype.getInt32 = function () {\n  var src = this.buffer;\n  var dst = convUint8;\n  var off = this.offset;\n  dst[0] = src[off];\n  dst[1] = src[off + 1];\n  dst[2] = src[off + 2];\n  dst[3] = src[off + 3];\n  this.offset += 4;\n  return convInt32[0];\n};\n\nInputStream.prototype.getUint32 = function () {\n  var src = this.buffer;\n  var dst = convUint8;\n  var off = this.offset;\n  dst[0] = src[off];\n  dst[1] = src[off + 1];\n  dst[2] = src[off + 2];\n  dst[3] = src[off + 3];\n  this.offset += 4;\n  return convUint32[0];\n};\n\nInputStream.prototype.getFloat32 = function () {\n  var src = this.buffer;\n  var dst = convUint8;\n  var off = this.offset;\n  dst[0] = src[off];\n  dst[1] = src[off + 1];\n  dst[2] = src[off + 2];\n  dst[3] = src[off + 3];\n  this.offset += 4;\n  return convFloat32[0];\n};\n\n//Specialized copy which copies 4 byte integers into 2-byte target.\n//Used for downcasting OCTM int32 index buffers to int16 index buffers,\n//in cases we know we don't need more (LMVTK guarantees 2 byte indices).\nInputStream.prototype.getIndicesArray = function (buffer, offset, numItems) {\n\n  var src = this.buffer;\n  var dst = new Uint8Array(buffer, offset, numItems * 2);\n  var off = this.offset;\n\n  for (var i = 0, iEnd = numItems * 2; i < iEnd; i += 2) {\n    dst[i] = src[off];\n    dst[i + 1] = src[off + 1];\n    off += 4;\n  }\n\n  this.offset = off;\n};\n\nInputStream.prototype.getVector3Array = function (arr, numItems, startOffset, stride) {\n  var src = this.buffer;\n  var off = this.offset;\n\n  //We cannot use Float32Array copying here because the\n  //source stream is out of alignment\n  var dst = new Uint8Array(arr.buffer, arr.byteOffset, arr.byteLength);\n\n  if (stride === 3 && startOffset === 0) {\n    var len = numItems * 12;\n    dst.set(src.subarray(off, off + len));\n    this.offset += len;\n  } else {\n\n    stride *= 4;\n    var aoff = startOffset * 4;\n    for (var i = 0; i < numItems; i++) {\n      for (var j = 0; j < 12; j++) {\n        dst[aoff + j] = src[off++];\n      }\n      aoff += stride;\n    }\n\n    this.offset = off;\n  }\n};\n\nInputStream.prototype.getVector2Array = function (arr, numItems, startOffset, stride) {\n  var src = this.buffer;\n  var dst = new Uint8Array(arr.buffer, arr.byteOffset, arr.byteLength);\n  var off = this.offset;\n\n  stride *= 4;\n  var aoff = startOffset * 4;\n  for (var i = 0; i < numItems; i++) {\n    for (var j = 0; j < 8; j++) {\n      dst[aoff + j] = src[off++];\n    }\n    aoff += stride;\n  }\n\n  this.offset = off;\n};\n\nInputStream.prototype.getVector4 = function (arr, offset) {\n  var src = this.buffer;\n  var dst = convUint8;\n  var off = this.offset;\n  var conv = convFloat32;\n\n  for (var j = 0; j < 4; j++) {\n    dst[0] = src[off];\n    dst[1] = src[off + 1];\n    dst[2] = src[off + 2];\n    dst[3] = src[off + 3];\n    arr[offset + j] = conv[0];\n    off += 4;\n  }\n\n  this.offset = off;\n};\n\nInputStream.prototype.getFloat64 = function () {\n  var src = this.buffer;\n  var dst = convUint8;\n  var off = this.offset;\n  for (var i = 0; i < 8; i++) {\n    dst[i] = src[off + i];}\n  this.offset += 8;\n  return convFloat64[0];\n};\n\n\n\nInputStream.prototype.getString = function (len) {\n  var res = utf8ArrayToString(this.buffer, this.offset, len);\n  this.offset += len;\n  return res;\n};\n\nInputStream.prototype.reset = function (buf) {\n  this.buffer = buf;\n  this.offset = 0;\n  this.byteLength = buf.length;\n};","\"use strict\";\n\n// http://www.onicos.com/staff/iz/amuse/javascript/expert/utf.txt\n/* utf.js - UTF-8 <=> UTF-16 convertion\n *\n * Copyright (C) 1999 Masanao Izumo <iz@onicos.co.jp>\n * Version: 1.0\n * LastModified: Dec 25 1999\n * This library is free.  You can redistribute it and/or modify it.\n */\nexport function utf8BlobToStr(array, start, length) {\n  var out, i, len, c;\n  var char2, char3;\n\n  out = '';\n  len = length;\n  i = 0;\n  while (i < len) {\n    c = array[start + i++];\n    switch (c >> 4) {\n\n      case 0:case 1:case 2:case 3:case 4:case 5:case 6:case 7:\n        // 0xxxxxxx\n        out += String.fromCharCode(c);\n        break;\n      case 12:case 13:\n        // 110x xxxx   10xx xxxx\n        char2 = array[start + i++];\n        out += String.fromCharCode((c & 0x1F) << 6 | char2 & 0x3F);\n        break;\n      case 14:\n        // 1110 xxxx  10xx xxxx  10xx xxxx\n        char2 = array[start + i++];\n        char3 = array[start + i++];\n        out += String.fromCharCode((c & 0x0F) << 12 |\n        (char2 & 0x3F) << 6 |\n        (char3 & 0x3F) << 0);\n        break;}\n\n  }\n\n  return out;\n}\n\n/**\n   * Safe version of utf8BlobToStr(), where Arrays are used to concatenate chars via join().\n   * This function exists because string::operator += crashes on Chrome with large inputs.\n   */\nexport function safeUtf8BlobToStr(array, start, length) {\n  var out, i, len, c, outArray, count;\n  var char2, char3;\n\n  var STR_CVT_LIMIT = 32 * 1024;\n  out = '';\n  outArray = [];\n  len = length;\n  count = 0;\n  i = 0;\n  while (i < len) {\n    c = array[start + i++];\n    switch (c >> 4) {\n\n      case 0:case 1:case 2:case 3:case 4:case 5:case 6:case 7:\n        // 0xxxxxxx\n        outArray.push(String.fromCharCode(c));\n        break;\n      case 12:case 13:\n        // 110x xxxx   10xx xxxx\n        char2 = array[start + i++];\n        outArray.push(String.fromCharCode((c & 0x1F) << 6 | char2 & 0x3F));\n        break;\n      case 14:\n        // 1110 xxxx  10xx xxxx  10xx xxxx\n        char2 = array[start + i++];\n        char3 = array[start + i++];\n        outArray.push(String.fromCharCode((c & 0x0F) << 12 |\n        (char2 & 0x3F) << 6 |\n        (char3 & 0x3F) << 0));\n        break;}\n\n    if (++count >= STR_CVT_LIMIT || i >= len) {\n      out += outArray.join(\"\");\n      outArray.length = 0;\n      count = 0;\n    }\n  }\n\n  return out;\n}\n\n\nexport function utf16to8(str, array, start) {\n  var i, len, c;\n\n  var j = start || 0;\n  len = str.length;\n\n  if (array) {\n    for (i = 0; i < len; i++) {\n      c = str.charCodeAt(i);\n      if (c >= 0x0001 && c <= 0x007F) {\n        array[j++] = c;\n      } else if (c > 0x07FF) {\n        array[j++] = 0xE0 | c >> 12 & 0x0F;\n        array[j++] = 0x80 | c >> 6 & 0x3F;\n        array[j++] = 0x80 | c >> 0 & 0x3F;\n      } else {\n        array[j++] = 0xC0 | c >> 6 & 0x1F;\n        array[j++] = 0x80 | c >> 0 & 0x3F;\n      }\n    }\n  } else {\n    //If no output buffer is passed in, estimate the required\n    //buffer size and return that.\n    for (i = 0; i < len; i++) {\n      c = str.charCodeAt(i);\n      if (c >= 0x0001 && c <= 0x007F) {\n        j++;\n      } else if (c > 0x07FF) {\n        j += 3;\n      } else {\n        j += 2;\n      }\n    }\n  }\n\n  return j - (start || 0);\n}\n\n\nvar USE_MANUAL_UTF8 = true;\nvar SAFE_UTF_LENGTH = 1024 * 1024;\n\nexport function utf8ArrayToString(array, start, length) {\n\n  if (start === undefined)\n  start = 0;\n  if (length === undefined)\n  length = array.length;\n\n  if (USE_MANUAL_UTF8) {\n    if (length > SAFE_UTF_LENGTH) {\n      return safeUtf8BlobToStr(array, start, length);\n    }\n    return utf8BlobToStr(array, start, length);\n  } else {\n    var encodedString = \"\";\n    for (var i = start, iEnd = start + length; i < iEnd; i++) {\n      encodedString += String.fromCharCode(array[i]);}\n\n    return decodeURIComponent(escape(encodedString));\n  }\n};\n\nexport function blobToJson(blob) {\n\n  var decodedString = utf8ArrayToString(blob, 0, blob.length);\n\n  return JSON.parse(decodedString);\n};\n\n//parses a piece of json from a given blob (representing an array of json values)\n//up to the next comma+newline combo (i.e. array delimiter).\nexport function subBlobToJson(blob, startIndex) {\n  if (startIndex === undefined) {\n    return '';\n  }\n\n  var i = startIndex;\n\n  while (i < blob.length - 1) {\n    var c = blob[i];\n    if (c == 44 && (blob[i + 1] == 10 || blob[i + 1] == 13)) //comma followed by newline?\n      break;\n    if (c == 10 || c == 13) //detect newline or line feed\n      break;\n    i++;\n  }\n\n  var decodedString = utf8ArrayToString(blob, startIndex, i - startIndex);\n  try {\n    return JSON.parse(decodedString);\n  } catch (e) {\n    console.error(\"Error parsing property blob to JSON : \" + decodedString);\n    return decodedString;\n  }\n};\n\nexport function subBlobToJsonInt(blob, startIndex) {\n  var val = 0;\n  var i = startIndex;\n\n  //Check for integers that were serialized as strings.\n  //This should not happen, ever, but hey, it does.\n  if (blob[i] == 34)\n  i++;\n\n  while (i < blob.length - 1) {\n    var c = blob[i];\n    if (c == 44 && (blob[i + 1] == 10 || blob[i + 1] == 13))\n    break;\n    if (c == 10 || c == 13 || c == 34)\n    break;\n    if (c >= 48 && c <= 57)\n    val = val * 10 + (c - 48);\n\n    i++;\n  }\n\n  return val;\n};\n\n//Simple integer array parse -- expects the array in property database\n//format, where the array is packed with possibly newline separator,\n//but no other white space. Does not do extensive error checking\nexport function parseIntArray(blob, wantSentinel) {\n\n  //find out how many items we have\n  var count = 0;\n  for (var i = 0, iEnd = blob.length; i < iEnd; i++) {\n    if (blob[i] == 44) //44 = ','\n      count++;}\n\n  count++; //last item has no comma after it\n\n  var items = new Uint32Array(count + (wantSentinel ? 1 : 0));\n\n  i = 0;\n  var end = blob.length;\n\n  while (blob[i] != 91 && i < end) {//91 = '['\n    i++;}\n\n  if (i == blob.length)\n  return null;\n\n  i++;\n\n  var seenDigit = false;\n  count = 0;\n  var curInt = 0;\n  while (i < end) {\n    var c = blob[i];\n    if (c >= 48 && c <= 57) {//digit\n      curInt = 10 * curInt + (c - 48);\n      seenDigit = true;\n    } else\n    if (c == 44 || c == 93) {//',' or ']'\n      if (seenDigit) {\n        items[count++] = curInt;\n        seenDigit = false;\n        curInt = 0;\n      }\n    } else {\n      seenDigit = false; //most likely a newline (the only other thing we have in our arrays\n      curInt = 0;\n    }\n    i++;\n  }\n\n  return items;\n};\n\n//Scans an array of json values (strings, integers, doubles) and finds the\n//offset of each value in the array, so that we can later pick off that\n//specific value, without parsing the whole (potentially huge) json array up front.\n//This expects the input blob to be in the form serialized by the property database\n//C++ component -- one value per line. A more sophisticated parser would be needed\n//in case the format changes and this assumption is not true anymore.\nexport function findValueOffsets(blob) {\n\n  //first, count how many items we have\n  var count = 0;\n  var end = blob.length - 1;\n\n  for (var i = 0; i < end; i++) {\n    if (blob[i] == 44 && (blob[i + 1] == 10 || blob[i + 1] == 13)) // ',' + newline is the item delimiter\n      count++;\n  }\n\n  if (!count)\n  return null;\n\n  count++; //one for the last item\n\n  var items = new Uint32Array(count);\n\n  i = 0;\n  count = 0;\n\n  //find opening [\n  while (blob[i] != 91 && i < end) {//91 = '['\n    i++;}\n\n  i++;\n\n  items[count++] = i;\n  var seenEol = false;\n  while (i < end) {\n    if (blob[i] == 10 || blob[i] == 13)\n    seenEol = true;else\n    if (seenEol) {\n      seenEol = false;\n      items[count++] = i;\n    }\n\n    i++;\n  }\n\n  return items;\n};","function _typeof(obj) {\"@babel/helpers - typeof\";if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {_typeof = function _typeof(obj) {return typeof obj;};} else {_typeof = function _typeof(obj) {return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;};}return _typeof(obj);}\nimport { LmvVector3 } from '../../../wgs/scene/LmvVector3';\nimport { LmvBox3 } from '../../../wgs/scene/LmvBox3';\nimport { LmvMatrix4 } from '../../../wgs/scene/LmvMatrix4';\n\nfunction getUnitScale(unit) {\n  //Why are translators not using standard strings for those?!?!?!?\n  switch (unit) {\n    case 'meter':\n    case 'meters':\n    case 'm':return 1.0;\n    case 'feet and inches':\n    case 'foot':\n    case 'feet':\n    case 'ft':return 0.3048;\n    case 'inch':\n    case 'inches':\n    case 'in':return 0.0254;\n    case 'centimeter':\n    case 'centimeters':\n    case 'cm':return 0.01;\n    case 'millimeter':\n    case 'millimeters':\n    case 'mm':return 0.001;\n    default:return 1.0;}\n\n}\n\n\nfunction isIdentity(mtx) {\n  var e = mtx.elements;\n  for (var i = 0; i < 4; i++) {\n    for (var j = 0; j < 4; j++) {\n      if (i === j) {\n        if (e[i * 4 + j] !== 1)\n        return false;\n      } else {\n        if (e[i * 4 + j] !== 0)\n        return false;\n      }\n    }\n  }\n\n  return true;\n}\n\n\nexport function derivePlacementTransform(svf, loadContext) {\n\n  // We now will apply overall model transforms, following the following logic:\n  //    1) placementTransform = options.placementTransform);\n  //    2) placementTransform = placementTransform.multiply(scalingTransform);\n  //    3) placementTransform = placementTransform.multiply(refPointTransform);\n  // This is for aggregation scenarios, where multiple models are loaded into the scene\n  // In such scenarios the client will most probably manually override the model units\n\n\n  //First, take the input placement transform as is (could be null).\n  svf.placementTransform = loadContext.placementTransform;\n\n  // If requested in the load options, apply scaling from optional 'from' to 'to' units.\n  // If unpecified, then units will be read from the models metadata.\n  // * usage overloads\n  //      options.appyScaling: { from: 'ft', to: 'm' }\n  //      options.appyScaling: 'm'   ( equivalent to { to: 'm' })\n  // * this is aimed at multiple 3D model situations where models potentialy have different units, but\n  //   one  doesn't up-front know what these units are.It also allows overriding of such units.\n  // * Model methods: getUnitString , getUnitScale &  getDisplayUnit will be automatically return corrected values\n  //   as long as there are no additional options.placementTransform scalings applied.\n  if (loadContext.applyScaling) {\n\n    // default 'from' & 'to'  units are from metadata, or 'm' not present\n    var scalingFromUnit = 'm';\n    if (svf.metadata[\"distance unit\"]) {\n      scalingFromUnit = svf.metadata[\"distance unit\"][\"value\"];\n    }\n    svf.scalingUnit = scalingFromUnit;\n\n    if ('object' === _typeof(loadContext.applyScaling)) {\n      if (loadContext.applyScaling.from) {\n        scalingFromUnit = loadContext.applyScaling.from;\n      }\n      if (loadContext.applyScaling.to) {\n        svf.scalingUnit = loadContext.applyScaling.to;\n      }\n    } else {\n      svf.scalingUnit = loadContext.applyScaling;\n    }\n\n\n    // Work out overall desired scaling factor.\n    var scalingFactor = getUnitScale(scalingFromUnit) / getUnitScale(svf.scalingUnit);\n\n    if (1 != scalingFactor) {\n\n      var placementS = new LmvMatrix4(true);\n\n      var scalingTransform = new LmvMatrix4(true);\n      scalingTransform.elements[0] = scalingFactor;\n      scalingTransform.elements[5] = scalingFactor;\n      scalingTransform.elements[10] = scalingFactor;\n\n      if (loadContext.placementTransform) {\n        // There may well already be a placementTransform from previous options/operations.\n        placementS.copy(loadContext.placementTransform);\n\n      }\n\n      // Combine (optional) placementTransform with scaling\n      if (loadContext.applyPlacementInModelUnits) {\n        // Apply placementMatrix first, then scale to viewer world units. In this way,\n        // the placementMatrix is handled in the same way as a refPointTransform.\n        loadContext.placementTransform = scalingTransform.multiply(placementS);\n      } else {\n        // Apply unitScaling first, then placementTransform\n        loadContext.placementTransform = placementS.multiply(scalingTransform);\n      }\n      svf.placementTransform = loadContext.placementTransform;\n\n      // Store scalingFactor, so that we know which unitScaling was applied to this model.\n      // Multiplying with this factor converts model file units to viewer world units.\n      svf.scalingFactor = scalingFactor;\n    }\n  }\n\n\n  var custom_values = svf.metadata[\"custom values\"];\n\n  if (custom_values && custom_values.refPointTransform) {\n\n    svf.refPointTransform = new LmvMatrix4(true);\n    var e = svf.refPointTransform.elements;\n    var src = custom_values.refPointTransform;\n\n    e[0] = src[0];\n    e[1] = src[1];\n    e[2] = src[2];\n\n    e[4] = src[3];\n    e[5] = src[4];\n    e[6] = src[5];\n\n    e[8] = src[6];\n    e[9] = src[7];\n    e[10] = src[8];\n\n    e[12] = src[9];\n    e[13] = src[10];\n    e[14] = src[11];\n\n  } else {\n    //Is there an extra offset specified in the georeference?\n    //This is important when aggregating Revit models from the same Revit\n    //project into the same scene, because Revit SVFs use RVT internal coordinates, which\n    //need extra offset to get into the world space.\n    var georeference = svf.metadata[\"georeference\"];\n    var refPointLMV = georeference && georeference[\"refPointLMV\"];\n\n    var angle = 0;\n    if (custom_values && custom_values.hasOwnProperty(\"angleToTrueNorth\")) {\n      angle = Math.PI / 180.0 * custom_values[\"angleToTrueNorth\"];\n    }\n\n    if (refPointLMV || angle) {\n\n      var rotation = new LmvMatrix4(true);\n      var m = rotation.elements;\n      m[0] = m[5] = Math.cos(angle);\n      m[1] = -Math.sin(angle);\n      m[4] = Math.sin(angle);\n\n      //refPointLMV is given in model local coordinates, hence the negation needed\n      //to make the translation go from local to shared coordinates.\n      var offset = new LmvMatrix4(true);\n      m = offset.elements;\n      if (refPointLMV) {\n        m[12] = -refPointLMV[0];\n        m[13] = -refPointLMV[1];\n        m[14] = -refPointLMV[2];\n      }\n\n      //Compose the rotation and offset.\n      svf.refPointTransform = rotation.multiply(offset);\n    }\n  }\n\n  //If request in the load options, apply the reference point transform when loading the model\n  if (loadContext.applyRefPoint && svf.refPointTransform) {\n\n    var placement = new LmvMatrix4(true);\n\n    //Normally we expect the input placement transform to come in as identity in case\n    //we have it specified in the georef here, but, whatever, let's be thorough for once.\n    if (loadContext.placementTransform)\n    placement.copy(loadContext.placementTransform);\n\n    placement.multiply(svf.refPointTransform);\n\n    svf.placementTransform = loadContext.placementTransform = placement;\n\n  } else if (!loadContext.applyRefPoint && loadContext.placementTransform) {\n\n    //In case we are given a placement transform that overrides the icoming refPointTransform\n\n    svf.placementTransform = new LmvMatrix4(true).copy(loadContext.placementTransform);\n\n  }\n\n  if (svf.placementTransform && isIdentity(svf.placementTransform))\n  svf.placementTransform = null;\n\n  return svf.placementTransform;\n}\n\nexport function calculatePlacementWithOffset(svf, pt) {\n  var go = svf.globalOffset;\n  if (go.x || go.y || go.z) {\n    if (!pt) {\n      pt = new LmvMatrix4(true);\n      pt.makeTranslation(-go.x, -go.y, -go.z);\n    } else {\n      var pt2 = new LmvMatrix4(true);\n      pt2.copy(pt);\n      pt = pt2;\n      pt.elements[12] -= go.x;\n      pt.elements[13] -= go.y;\n      pt.elements[14] -= go.z;\n    }\n\n    svf.placementWithOffset = pt;\n  } else {\n    svf.placementWithOffset = pt;\n  }\n}\n\nexport function initPlacement(svf, loadContext) {\n\n  if (!svf.metadata)\n  return;\n\n  //Retrieve world bounding box\n  var bbox = svf.metadata[\"world bounding box\"];\n  var min = new LmvVector3(bbox.minXYZ[0], bbox.minXYZ[1], bbox.minXYZ[2]);\n  var max = new LmvVector3(bbox.maxXYZ[0], bbox.maxXYZ[1], bbox.maxXYZ[2]);\n  svf.bbox = new LmvBox3(min, max);\n  svf.modelSpaceBBox = svf.bbox.clone();\n\n  var pt = derivePlacementTransform(svf, loadContext);\n  if (pt && !svf.bbox.empty()) {\n    svf.bbox.applyMatrix4(pt);\n  }\n\n  //Global offset is used to avoid floating point precision issues for models\n  //located enormous distances from the origin. The default is to move the model to the origin\n  //but it can be overridden in case of model aggregation scenarios, where multiple\n  //models are loaded into the scene and a common offset is needed for all.\n  if (loadContext.globalOffset) {\n    // Apply user-defined globalOffset\n    svf.globalOffset = loadContext.globalOffset;\n  } else {\n    // Choose global offset automatically at the center of the placmenent transformed model. \n    svf.globalOffset = svf.bbox.center();\n  }\n\n  calculatePlacementWithOffset(svf, pt);\n\n  // The model boundingBox must finally be in viewer-coords, just like everything else. I.e. with subtracted offset.\n  // Therefore, we have to subtract the globaloffset from bbox as well.\n  if (!svf.bbox.empty()) {\n    svf.bbox.min.sub(svf.globalOffset);\n    svf.bbox.max.sub(svf.globalOffset);\n  }\n\n  if (svf.metadata.hasOwnProperty(\"double sided geometry\") &&\n  svf.metadata[\"double sided geometry\"][\"value\"]) //TODO: do we want to check the global flag or drop that and rely on material only?\n    {\n      svf.doubleSided = true;\n    }\n\n}\n\nfunction applyOffset(a, offset) {\n  a[0] -= offset.x;\n  a[1] -= offset.y;\n  a[2] -= offset.z;\n}\n\n\nexport function transformAnimations(svf) {\n\n  if (!svf.animations)\n  return;\n\n  // apply global offset to animations\n  var animations = svf.animations[\"animations\"];\n  if (animations) {\n    var globalOffset = svf.globalOffset;\n    var t = new LmvMatrix4().makeTranslation(globalOffset.x, globalOffset.y, globalOffset.z);\n    var tinv = new LmvMatrix4().makeTranslation(-globalOffset.x, -globalOffset.y, -globalOffset.z);\n    var r = new LmvMatrix4();\n    var m = new LmvMatrix4();\n    for (var a = 0; a < animations.length; a++) {\n      var anim = animations[a];\n      if (anim.hierarchy) {\n        for (var h = 0; h < anim.hierarchy.length; h++) {\n          var keys = anim.hierarchy[h].keys;\n          if (keys) {\n            for (var k = 0; k < keys.length; k++) {\n              var pos = keys[k].pos;\n              if (pos) {\n                var offset = globalOffset;\n                var rot = keys[k].rot;\n                if (rot) {\n                  r.makeRotationFromQuaternion({ x: rot[0], y: rot[1], z: rot[2], w: rot[3] });\n                  m.multiplyMatrices(t, r).multiply(tinv);\n                  offset = { x: m.elements[12], y: m.elements[13], z: m.elements[14] };\n                }\n                applyOffset(pos, offset);\n              }\n              var target = keys[k].target;\n              if (target) {\n                applyOffset(target, globalOffset);\n              }\n              var points = keys[k].points;\n              if (points) {\n                for (var p = 0; p < points.length; p++) {\n                  applyOffset(points[p], globalOffset);\n                }\n              }\n            }\n          }\n        }\n      }\n    }\n  }\n\n\n}","\n\"use strict\";\n\nvar TAU = Math.PI * 2;\n\nvar VBB_GT_TRIANGLE_INDEXED = 0,\nVBB_GT_LINE_SEGMENT = 1,\nVBB_GT_ARC_CIRCULAR = 2,\nVBB_GT_ARC_ELLIPTICAL = 3,\nVBB_GT_TEX_QUAD = 4,\nVBB_GT_ONE_TRIANGLE = 5,\nVBB_GT_MSDF_TRIANGLE_INDEXED = 6,\nVBB_GT_TEX_TRIANGLE_INDEXED = 7;\n\nvar VBB_INSTANCED_FLAG = 0, // this is intentionally 0 for the instancing case!\nVBB_SEG_START_RIGHT = 0, // this starts intentionally at 0!\nVBB_SEG_START_LEFT = 1,\nVBB_SEG_END_RIGHT = 2,\nVBB_SEG_END_LEFT = 3;\n\nvar VBB_COLOR_OFFSET = 6,\nVBB_DBID_OFFSET = 7,\nVBB_FLAGS_OFFSET = 8,\nVBB_LAYER_VP_OFFSET = 9;\n\nvar QUAD_TRIANGLE_INDICES = [0, 1, 3, 0, 3, 2];\n\nexport function VertexBufferBuilder(useInstancing, allocSize, fullCount, useCompactBuffers)\n{\n  var MAX_VCOUNT = allocSize || 65536;\n  this.FULL_COUNT = (fullCount || 32767) | 0;\n\n  this.useInstancing = useInstancing;\n  this.useCompactBuffers = useCompactBuffers;\n\n  this.stride = 10;\n  this.allocVcount = 4 * (this.useInstancing ? MAX_VCOUNT / 4 : MAX_VCOUNT);\n\n  this.vb = new ArrayBuffer(this.stride * this.allocVcount);\n  this.vbf = new Float32Array(this.vb);\n  this.vbi = new Int32Array(this.vb);\n  this.ib = this.useInstancing ? null : new Uint16Array(MAX_VCOUNT);\n  this.minLineWidth = Number.MAX_VALUE;\n  this.reset(0);\n\n}\n\nVertexBufferBuilder.prototype.reset = function (vcount) {\n  // This is used to restore the vcount when restoring stream state as well as at init time.\n  this.vcount = vcount;\n\n  this.icount = 0;\n\n  this.minx = this.miny = Infinity;\n  this.maxx = this.maxy = -Infinity;\n\n  //Keeps track of objectIds referenced by geometry in the VB\n  this.dbIds = {};\n  this.lastDbId = null;\n\n  //Keep track of unique colors used by this VB\n  this.colors = {};\n\n  this.numEllipticals = 0;\n  this.numCirculars = 0;\n  this.numTriangleGeoms = 0;\n\n  // If false, all lines are of type 0 (solid), so that we don't need line-pattern support.\n  this.hasLineStyles = false;\n\n  //Certain fields can be invariant over large numbers of primitives.\n  //We keep track of those in order to optimize the vertex layout by\n  //pulling invariants into shader uniforms.\n  this.changeTracking = {};\n\n  this.stride = 10;\n};\n\nVertexBufferBuilder.prototype.expandStride = function ()\n{\n  //Currently hardcoded to expand by 4 floats.\n  var expandBy = 2;\n\n  var stride = this.stride;\n\n  if (stride >= 12)\n  return;\n\n  var nstride = this.stride + expandBy;\n\n  var nvb = new ArrayBuffer(nstride * this.allocVcount);\n\n  var src = new Uint8Array(this.vb);\n  var dst = new Uint8Array(nvb);\n\n  for (var i = 0, iEnd = this.vcount; i < iEnd; i++) {\n    var os = i * stride * 4;\n    var od = i * nstride * 4;\n\n    for (var j = 0; j < stride * 4; j++) {\n      dst[od + j] = src[os + j];}\n  }\n\n  this.vb = nvb;\n  this.vbf = new Float32Array(nvb);\n  this.vbi = new Int32Array(nvb);\n  this.stride = nstride;\n\n};\n\nVertexBufferBuilder.prototype.addToBounds = function (x, y)\n{\n  if (x < this.minx) this.minx = x;\n  if (x > this.maxx) this.maxx = x;\n  if (y < this.miny) this.miny = y;\n  if (y > this.maxy) this.maxy = y;\n};\n\nvar _toInt32 = new Int32Array(1);\nfunction toInt32(c) {\n  _toInt32[0] = c;\n  return _toInt32[0];\n}\n\nVertexBufferBuilder.prototype.trackChanges = function (geomType, color, dbId, layerId, vpId, linePattern) {\n\n  if (dbId !== this.lastDbId) {\n    this.dbIds[toInt32(dbId)] = 1;\n    this.lastDbId = dbId;\n  }\n\n  if (linePattern) {\n    this.hasLineStyles = true;\n  }\n\n  if (!this.useCompactBuffers)\n  return;\n\n  var ct = this.changeTracking;\n\n  function checkOne(whichAttr, val) {\n    if (ct[whichAttr] === undefined)\n    ct[whichAttr] = geomType;else\n    if (ct[whichAttr] === val)\n    ct[whichAttr + \"Varies\"] = true;\n  }\n\n  checkOne(\"geomType\", geomType);\n  checkOne(\"color\", color);\n  checkOne(\"dbId\", dbId);\n  checkOne(\"layerId\", layerId);\n  checkOne(\"viewportId\", vpId);\n  checkOne(\"linePattern\", linePattern);\n\n  this.colors[toInt32(color)] = 1;\n};\n\n\nVertexBufferBuilder.prototype.setCommonVertexAttribs = function (offset, vertexId, geomType, color, dbId, layerId, vpId, linePattern)\n{\n  this.trackChanges(geomType, color, dbId, layerId, vpId, linePattern);\n\n  // align changes here with the \"decodeCommonAttribs()\" function in LineShader.js and VertexBufferReader.js!!!\n  vertexId = vertexId & 0xff; //  8 bit\n  geomType = geomType & 0xff; //  8 bit\n  linePattern = linePattern & 0xff; //  8 bit\n  layerId = layerId & 0xffff; // 16 bit\n  vpId = vpId & 0xffff; // 16 bit\n\n  this.vbi[offset + VBB_FLAGS_OFFSET] = vertexId | geomType << 8 | linePattern << 16; // vertexId: int8; geomType: int8; linePattern: int8; ghostingFlag: int8\n  this.vbi[offset + VBB_COLOR_OFFSET] = color;\n  this.vbi[offset + VBB_DBID_OFFSET] = dbId;\n  this.vbi[offset + VBB_LAYER_VP_OFFSET] = layerId | vpId << 16; // layerId: int16; vpId: int16\n};\n\n//Creates a non-indexed triangle geometry vertex (triangle vertex coords stored in single vertex structure)\nVertexBufferBuilder.prototype.addVertexTriangleGeom = function (x1, y1, x2, y2, x3, y3, color, dbId, layerId, vpId)\n{\n  var vi = this.vcount;\n  var vbf = this.vbf;\n\n  var repeat = this.useInstancing ? 1 : 4;\n  for (var i = 0; i < repeat; i++) {\n    var offset = (vi + i) * this.stride;\n\n    // align changes here with the \"decodeTriangleData()\" function in LineShader.js!!!\n    vbf[offset] = x1;\n    vbf[offset + 1] = y1;\n    vbf[offset + 2] = x2;\n\n    vbf[offset + 3] = y2;\n    vbf[offset + 4] = x3;\n    vbf[offset + 5] = y3;\n\n    this.setCommonVertexAttribs(offset, VBB_SEG_START_RIGHT + i, VBB_GT_ONE_TRIANGLE, color, dbId, layerId, vpId, /*linePattern*/0);\n    this.vcount++;\n  }\n\n  return vi;\n};\n\n\nVertexBufferBuilder.prototype.addVertexLine = function (x, y, angle, distanceAlong, totalDistance, lineWidth, color, dbId, layerId, vpId, lineType)\n{\n  var vi = this.vcount;\n  var vbf = this.vbf;\n\n  if (dbId >= 0 && lineWidth > 0 && distanceAlong > 0) {\n    this.minLineWidth = Math.min(this.minLineWidth, lineWidth);\n  }\n\n  var repeat = this.useInstancing ? 1 : 4;\n  for (var i = 0; i < repeat; i++) {\n    var offset = (vi + i) * this.stride;\n\n    // align changes here with the \"decodeSegmentData()\" function in LineShader.js and VertexBufferReader!!!\n    vbf[offset] = x;\n    vbf[offset + 1] = y;\n    vbf[offset + 2] = (angle + Math.PI) / TAU;\n\n    vbf[offset + 3] = distanceAlong;\n    vbf[offset + 4] = lineWidth * 0.5; // we are storing only the half width (i.e., the radius)\n    vbf[offset + 5] = totalDistance;\n\n    this.setCommonVertexAttribs(offset, VBB_SEG_START_RIGHT + i, VBB_GT_LINE_SEGMENT, color, dbId, layerId, vpId, lineType);\n    this.vcount++;\n  }\n\n  return vi;\n};\n\nVertexBufferBuilder.prototype.addVertexTexQuad = function (centerX, centerY, width, height, rotation, color, dbId, layerId, vpId)\n{\n  var vi = this.vcount;\n  var vbf = this.vbf;\n\n  var repeat = this.useInstancing ? 1 : 4;\n  for (var i = 0; i < repeat; i++) {\n    var offset = (vi + i) * this.stride;\n\n    // align changes here with the \"decodeTexQuadData()\" function in LineShader.js!!!\n    vbf[offset] = centerX;\n    vbf[offset + 1] = centerY;\n    vbf[offset + 2] = rotation / TAU;\n\n    vbf[offset + 3] = width;\n    vbf[offset + 4] = height;\n\n    this.setCommonVertexAttribs(offset, VBB_SEG_START_RIGHT + i, VBB_GT_TEX_QUAD, color, dbId, layerId, vpId, /*linePattern*/0);\n    this.vcount++;\n  }\n\n  return vi;\n};\n\n\nVertexBufferBuilder.prototype.addVertexArc = function (x, y, startAngle, endAngle, major, minor, tilt, lineWidth, color, dbId, layerId, vpId)\n{\n  var vi = this.vcount;\n  var vbf = this.vbf;\n\n  var geomType = major == minor ? VBB_GT_ARC_CIRCULAR : VBB_GT_ARC_ELLIPTICAL;\n\n  var repeat = this.useInstancing ? 1 : 4;\n  for (var i = 0; i < repeat; i++) {\n    var offset = (vi + i) * this.stride;\n\n    // align changes here with the \"decodeArcData()\" function in LineShader.js!!!\n    vbf[offset] = x;\n    vbf[offset + 1] = y;\n    vbf[offset + 2] = startAngle / TAU;\n\n    vbf[offset + 3] = endAngle / TAU;\n    vbf[offset + 4] = lineWidth * 0.5; // we are storing only the half width (i.e., the radius)\n    vbf[offset + 5] = major; // = radius for circular arcs\n\n    if (geomType === VBB_GT_ARC_ELLIPTICAL) {\n      vbf[offset + 10] = minor;\n      vbf[offset + 11] = tilt;\n    }\n\n    this.setCommonVertexAttribs(offset, VBB_SEG_START_RIGHT + i, geomType, color, dbId, layerId, vpId, /*linePattern*/0);\n    this.vcount++;\n  }\n\n  return vi;\n};\n\n\n\n\n//====================================================================================================\n//====================================================================================================\n// Indexed triangle code path can only be used when hardware instancing is not in use.\n// Otherwise, the addTriangleGeom operation should be used to add simple triangles to the buffer.\n//====================================================================================================\n//====================================================================================================\n\nVertexBufferBuilder.prototype.addVertex = function (x, y, color, dbId, layerId, vpId)\n{var flag = arguments.length > 6 && arguments[6] !== undefined ? arguments[6] : VBB_GT_TRIANGLE_INDEXED;\n  if (this.useInstancing)\n  return; //not supported if instancing is used.\n\n  var vi = this.vcount;\n  var offset = this.stride * vi;\n  var vbf = this.vbf;\n\n  // align changes here with the \"decodeTriangleData()\" function in LineShader.js!!!\n  vbf[offset] = x;\n  vbf[offset + 1] = y;\n\n  this.setCommonVertexAttribs(offset, /*vertexId*/0, flag, color, dbId, layerId, vpId, /*linePattern*/0);\n  this.vcount++;\n\n  return vi;\n};\n\n\nVertexBufferBuilder.prototype.addVertexPolytriangle = function (x, y, color, dbId, layerId, vpId)\n{\n  if (this.useInstancing)\n  return; //not supported if instancing is used.\n\n  this.addVertex(x, y, color, dbId, layerId, vpId);\n\n  this.addToBounds(x, y);\n};\n\nVertexBufferBuilder.prototype.addVertexMSDFPolytriangle = function (x, y, u, v, color, dbId, layerId, vpId)\n{\n  this.addVertexTexPolytriangle(x, y, u, v, color, dbId, layerId, vpId, VBB_GT_MSDF_TRIANGLE_INDEXED);\n};\n\nVertexBufferBuilder.prototype.addIndices = function (indices, vindex) {\n\n  if (this.useInstancing)\n  return; //not supported if instancing is used.\n\n  var ib = this.ib;\n  var ii = this.icount;\n\n  if (ii + indices.length >= ib.length) {\n    var ibnew = new Uint16Array(Math.max(indices.length, ib.length) * 2);\n    for (var i = 0; i < ii; ++i) {\n      ibnew[i] = ib[i];\n    }\n    this.ib = ib = ibnew;\n  }\n\n  for (var i = 0; i < indices.length; ++i) {\n    ib[ii + i] = vindex + indices[i];\n  }\n\n  this.icount += indices.length;\n};\n\n//====================================================================================================\n//====================================================================================================\n// End indexed triangle code path.\n//====================================================================================================\n//====================================================================================================\n\n\nVertexBufferBuilder.prototype.finalizeQuad = function (vindex)\n{\n  if (!this.useInstancing) {\n    this.addIndices(QUAD_TRIANGLE_INDICES, vindex);\n  }\n};\n\n\nVertexBufferBuilder.prototype.addSegment = function (x1, y1, x2, y2, totalDistance, lineWidth, color, dbId, layerId, vpId, lineType)\n{\n  var dx = x2 - x1;\n  var dy = y2 - y1;\n  var angle = dx || dy ? Math.atan2(dy, dx) : 0.0;\n  var segLen = dx || dy ? Math.sqrt(dx * dx + dy * dy) : 0.0;\n\n  //Add four vertices for the bbox of this line segment\n  //This call sets the stuff that's common for all four\n  var v = this.addVertexLine(x1, y1, angle, segLen, totalDistance, lineWidth, color, dbId, layerId, vpId, lineType);\n\n  this.finalizeQuad(v);\n  this.addToBounds(x1, y1);\n  this.addToBounds(x2, y2);\n};\n\n\n//Creates a non-indexed triangle geometry (triangle vertex coords stored in single vertex structure)\nVertexBufferBuilder.prototype.addTriangleGeom = function (x1, y1, x2, y2, x3, y3, color, dbId, layerId, vpId)\n{\n  this.numTriangleGeoms++;\n\n  var v = this.addVertexTriangleGeom(x1, y1, x2, y2, x3, y3, color, dbId, layerId, vpId);\n\n  this.finalizeQuad(v);\n  this.addToBounds(x1, y1);\n  this.addToBounds(x2, y2);\n  this.addToBounds(x3, y3);\n};\n\nVertexBufferBuilder.prototype.addArc = function (cx, cy, start, end, major, minor, tilt, lineWidth, color, dbId, layerId, vpId)\n{\n  if (major == minor) {\n    this.numCirculars++;\n  } else {\n    this.numEllipticals++;\n\n    //Ellipticals need large vertex layout\n    this.expandStride();\n  }\n\n  // This is a workaround, when the circular arc has rotation, the extractor cannot handle it.\n  // After the fix is deployed in extractor, this can be removed.\n  var result = fixUglyArc(start, end);\n  start = result.start;\n  end = result.end;\n\n  //If both start and end angles are exactly 0, it's a complete ellipse/circle\n  //This is working around a bug in the F2D writer, where an fmod operation will potentially.\n  //convert 2pi to 0.\n  if (start == 0 && end == 0)\n  end = TAU;\n\n  //Add two zero length segments as round caps at the end points\n  {\n    //If it's a full ellipse, then we don't need caps\n    var range = Math.abs(start - end);\n    if (range > 0.0001 && Math.abs(range - TAU) > 0.0001)\n    {\n      var sx = cx + major * Math.cos(start);\n      var sy = cy + minor * Math.sin(start);\n      this.addSegment(sx, sy, sx, sy, 0, lineWidth, color, dbId, layerId, vpId);\n\n      var ex = cx + major * Math.cos(end);\n      var ey = cy + minor * Math.sin(end);\n      this.addSegment(ex, ey, ex, ey, 0, lineWidth, color, dbId, layerId, vpId);\n\n      //TODO: also must add all the vertices at all multiples of PI/2 in the start-end range to get exact bounds\n    } else\n\n    {\n      this.addToBounds(cx - major, cy - minor);\n      this.addToBounds(cx + major, cy + minor);\n    }\n\n    // Add the center of the circle / ellipse as a single transparent dot - So it wil be snappable.\n    var hiddenColor = 0x01ffffff; // Note that lineShader discards fully transparent fragments. Therefore, we use a white here with very small, but nonzero alpha.\n    var c = this.addVertexLine(cx, cy, 0, 0.0001, 0, 0, hiddenColor, dbId, layerId, vpId);\n    this.finalizeQuad(c);\n  }\n\n  var v = this.addVertexArc(cx, cy, start, end, major, minor, tilt, lineWidth, color, dbId, layerId, vpId);\n\n  this.finalizeQuad(v);\n\n  //Testing caps\n  if (false) {\n    //If it's a full ellipse, then we don't need caps\n    var range = Math.abs(start - end);\n    if (Math.abs(range - TAU) > 0.0001)\n    {\n      var sx = cx + major * Math.cos(start);\n      var sy = cy + minor * Math.sin(start);\n      this.addSegment(sx, sy, sx, sy, 0, lineWidth, 0xff00ffff, dbId, layerId, vpId);\n\n      var ex = cx + major * Math.cos(end);\n      var ey = cy + minor * Math.sin(end);\n      this.addSegment(ex, ey, ex, ey, 0, lineWidth, 0xff00ffff, dbId, layerId, vpId);\n    }\n  }\n};\n\n\nVertexBufferBuilder.prototype.addTexturedQuad = function (centerX, centerY, width, height, rotation, color, dbId, layerId, vpId)\n{\n  //Height is specified using the line weight field.\n  //This will result in height being clamped to at least one pixel\n  //but that's ok (zero height for an image would be rare).\n  var v = this.addVertexTexQuad(centerX, centerY, width, height, rotation, color, dbId, layerId, vpId);\n\n  this.finalizeQuad(v);\n\n  var cos = 0.5 * Math.cos(rotation);\n  var sin = 0.5 * Math.sin(rotation);\n  var w = Math.abs(width * cos) + Math.abs(height * sin);\n  var h = Math.abs(width * sin) + Math.abs(height * cos);\n  this.addToBounds(centerX - w, centerY - h);\n  this.addToBounds(centerX + w, centerY + h);\n};\n\nVertexBufferBuilder.prototype.addVertexImagePolytriangle = function (x, y, u, v, color, dbId, layerId, vpId) {\n  return this.addVertexTexPolytriangle(x, y, u, v, color, dbId, layerId, vpId, VBB_GT_TEX_TRIANGLE_INDEXED);\n};\n\nVertexBufferBuilder.prototype.addVertexTexPolytriangle = function (x, y, u, v, color, dbId, layerId, vpId, type) {\n  if (this.useInstancing)\n  return; //not supported if instancing is used.\n\n  var vi = this.vcount;\n  var vbf = this.vbf;\n  this.addVertex(x, y, color, dbId, layerId, vpId, type);\n\n  // put the UV data into the fields2 attribute\n  vbf[vi * this.stride + 2] = u;\n  vbf[vi * this.stride + 3] = v;\n\n  this.addToBounds(x, y);\n};\n\n\nVertexBufferBuilder.prototype.isFull = function (addCount)\n{\n  addCount = addCount || 3;\n  var mult = this.useInstancing ? 4 : 1;\n\n  return this.vcount * mult + addCount > this.FULL_COUNT;\n};\n\n//Determines if there are invariant memebers in the vertex layout,\n//which can be moved out to shader uniforms to save space.\n//Determines if uint16 can be used to store positions data\nVertexBufferBuilder.prototype.makeCompactVertexLayout = function () {\n\n  var colorKeys = Object.keys(this.colors);\n  var dbIdsKeys = Object.keys(this.dbIds);\n\n  // if (this.changeTracking.geomType === VBB_GT_LINE_SEGMENT && !this.changeTracking.geomTypeVaries) {\n  //   console.log(\"Vertex buffer only has lines\");\n  // }\n\n  // if (this.changeTracking.color === VBB_GT_LINE_SEGMENT && !this.changeTracking.colorVaries) {\n  //     console.log(\"Vertex buffer has invariant color\");\n  // } else {\n  //     console.log(\"Num colors:\", colorKeys.length);\n  // }\n\n  // if (!this.changeTracking.viewportIdVaries) {\n  //     console.log(\"Vertex buffer has invariant viewportId\");\n  // }\n\n  // if (!this.changeTracking.layerIdVaries) {\n  //     console.log(\"Vertex buffer has invariant layerId\");\n  // }\n\n  // if (!this.changeTracking.dbIdVaries) {\n  //     console.log(\"Vertex buffer has invariant dbId\");\n  // } else {\n  //     console.log(\"Num dbIds:\", dbIdsKeys.length);\n  // }\n\n  if (this.stride !== 10)\n  return null;\n\n  //create the color/dbId index texture\n  var texLen = colorKeys.length + dbIdsKeys.length;\n\n  if (colorKeys.length + dbIdsKeys.length > 65536)\n  return null;\n\n  var texData = new Int32Array(texLen + 1);\n  texData[0] = 0;\n  var count = 1;\n  for (var i = 0; i < colorKeys.length; i++, count++) {\n    texData[count] = parseInt(colorKeys[i]);\n    this.colors[colorKeys[i]] = count;\n  }\n  for (var i = 0; i < dbIdsKeys.length; i++, count++) {\n    texData[count] = parseInt(dbIdsKeys[i]);\n    this.dbIds[dbIdsKeys[i]] = count;\n  }\n\n  var compactStride = 6;\n\n  var vb = new ArrayBuffer(compactStride * 4 * this.vcount);\n  var vbi = new Int32Array(vb);\n  var vbs = new Uint16Array(vb);\n\n  var sx = this.maxx - this.minx || 1;\n  var sy = this.maxy - this.miny || 1;\n  var ox = this.minx;\n  var oy = this.miny;\n  var ss = Math.max(sx, sy);\n\n  function tx(x) {\n    return 0 | Math.round((x - ox) / sx * 65535);\n  }\n\n  function ty(y) {\n    return 0 | Math.round((y - oy) / sy * 65535);\n  }\n\n  function ts(x) {\n    return 0 | Math.round(x / ss * 65535);\n  }\n\n  function unit(x) {\n    return 0 | x * 65535;\n  }\n\n  function lineWeight(x) {\n    if (x < 0) {\n      return 32768 + Math.min(1.0, -x / 1024) * 32767;\n    } else {\n      // Don't allow non-zero line weights to become 0 because\n      // of the compact buffer format.\n      return x ? 0 | Math.round(x / ss * 32767) || 1 : x;\n    }\n  }\n\n  for (var i = 0; i < this.vcount; i++) {\n\n    var srcOffset = this.stride * i;\n    var dstOffset = compactStride * i;\n    var ushortOffset = dstOffset * 2;\n\n    var gt = this.vbi[srcOffset + VBB_FLAGS_OFFSET] >> 8 & 0xff;\n\n    //Handle data that varies per geometry type and needs scaling\n    //to uint16 packing, e.g. positions and angles\n    switch (gt) {\n      case VBB_GT_TRIANGLE_INDEXED:\n        vbs[ushortOffset] = tx(this.vbf[srcOffset]);\n        vbs[ushortOffset + 1] = ty(this.vbf[srcOffset + 1]);\n        break;\n\n      case VBB_GT_LINE_SEGMENT:\n        vbs[ushortOffset] = tx(this.vbf[srcOffset]);\n        vbs[ushortOffset + 1] = ty(this.vbf[srcOffset + 1]);\n        vbs[ushortOffset + 2] = unit(this.vbf[srcOffset + 2]);\n        vbs[ushortOffset + 3] = ts(this.vbf[srcOffset + 3]);\n        vbs[ushortOffset + 4] = lineWeight(this.vbf[srcOffset + 4]);\n        break;\n\n      case VBB_GT_ARC_CIRCULAR:\n        vbs[ushortOffset] = tx(this.vbf[srcOffset]);\n        vbs[ushortOffset + 1] = ty(this.vbf[srcOffset + 1]);\n        vbs[ushortOffset + 2] = unit(this.vbf[srcOffset + 2]);\n        vbs[ushortOffset + 3] = unit(this.vbf[srcOffset + 3]);\n        vbs[ushortOffset + 4] = lineWeight(this.vbf[srcOffset + 4]);\n        vbs[ushortOffset + 5] = ts(this.vbf[srcOffset + 5]);\n        break;\n\n      case VBB_GT_ARC_ELLIPTICAL:\n        //will not happen\n        break;\n\n      case VBB_GT_TEX_QUAD:\n        vbs[ushortOffset] = tx(this.vbf[srcOffset]);\n        vbs[ushortOffset + 1] = ty(this.vbf[srcOffset + 1]);\n        vbs[ushortOffset + 2] = unit(this.vbf[srcOffset + 2]);\n        vbs[ushortOffset + 3] = ts(this.vbf[srcOffset + 3]);\n        vbs[ushortOffset + 4] = ts(this.vbf[srcOffset + 4]);\n        break;\n\n      case VBB_GT_ONE_TRIANGLE:\n        vbs[ushortOffset] = tx(this.vbf[srcOffset]);\n        vbs[ushortOffset + 1] = ty(this.vbf[srcOffset + 1]);\n        vbs[ushortOffset + 2] = tx(this.vbf[srcOffset + 2]);\n        vbs[ushortOffset + 3] = ty(this.vbf[srcOffset + 3]);\n        vbs[ushortOffset + 4] = tx(this.vbf[srcOffset + 4]);\n        vbs[ushortOffset + 5] = ty(this.vbf[srcOffset + 5]);\n        break;\n\n      default:console.error(\"Unknown geometry type\");break;}\n\n\n    //Copy the common data to the new offset\n    vbs[ushortOffset + 6] = this.colors[this.vbi[srcOffset + VBB_COLOR_OFFSET]] || 0;\n    vbs[ushortOffset + 7] = this.dbIds[this.vbi[srcOffset + VBB_DBID_OFFSET]] || 0;\n\n    vbi[dstOffset + 4] = this.vbi[srcOffset + VBB_FLAGS_OFFSET];\n    vbi[dstOffset + 5] = this.vbi[srcOffset + VBB_LAYER_VP_OFFSET];\n  }\n\n  var mesh = {};\n\n  mesh.vb = new Float32Array(vb);\n  mesh.vbstride = compactStride;\n\n  var d = this.useInstancing ? 1 : 0;\n\n  mesh.vblayout = {\n    \"fields1\": { offset: 0, itemSize: 2, bytesPerItem: 2, divisor: d, normalize: true },\n    \"fields2\": { offset: 1, itemSize: 4, bytesPerItem: 2, divisor: d, normalize: true },\n    \"uvIdColor\": { offset: 3, itemSize: 2, bytesPerItem: 2, divisor: d, normalize: false },\n    \"flags4b\": { offset: 4, itemSize: 4, bytesPerItem: 1, divisor: d, normalize: false },\n    \"layerVp4b\": { offset: 5, itemSize: 4, bytesPerItem: 1, divisor: d, normalize: false } };\n\n\n  mesh.unpackXform = { x: sx, y: sy, z: ox, w: oy };\n  mesh.texData = texData;\n\n  return mesh;\n};\n\nVertexBufferBuilder.prototype.makeWideVertexLayout = function () {\n  var mesh = {};\n\n  mesh.vb = new Float32Array(this.vb.slice(0, this.vcount * this.stride * 4));\n  mesh.vbstride = this.stride;\n\n  var d = this.useInstancing ? 1 : 0;\n\n  mesh.vblayout = {\n    \"fields1\": { offset: 0, itemSize: 2, bytesPerItem: 4, divisor: d, normalize: false },\n    \"fields2\": { offset: 2, itemSize: 4, bytesPerItem: 4, divisor: d, normalize: false },\n    \"color4b\": { offset: VBB_COLOR_OFFSET, itemSize: 4, bytesPerItem: 1, divisor: d, normalize: true },\n    \"dbId4b\": { offset: VBB_DBID_OFFSET, itemSize: 4, bytesPerItem: 1, divisor: d, normalize: false },\n    \"flags4b\": { offset: VBB_FLAGS_OFFSET, itemSize: 4, bytesPerItem: 1, divisor: d, normalize: false },\n    \"layerVp4b\": { offset: VBB_LAYER_VP_OFFSET, itemSize: 4, bytesPerItem: 1, divisor: d, normalize: false } };\n\n\n  //Set the expanded vertex layout to use the last two floats in the buffer. If the\n  //were allocated then it is good. If they weren't it overlaps the flags4b and layerVp4b\n  //channels, but since the extraParams won't be used in the shader it won't matter.\n  //Doing this lets the shader connect to something and prevents crashes on iOS.\n  mesh.vblayout[\"extraParams\"] = { offset: this.stride - 2, itemSize: 2, bytesPerItem: 4, divisor: d, normalize: false };\n  return mesh;\n};\n\nVertexBufferBuilder.prototype.toMesh = function ()\n{\n  var mesh = null;\n\n  if (this.useCompactBuffers)\n  mesh = this.makeCompactVertexLayout();\n\n  if (!mesh)\n  mesh = this.makeWideVertexLayout();\n\n  if (this.useInstancing) {\n    mesh.numInstances = this.vcount;\n\n    //Set up trivial vertexId and index attributes\n\n    var instFlags = new Int32Array([VBB_SEG_START_RIGHT, VBB_SEG_START_LEFT, VBB_SEG_END_RIGHT, VBB_SEG_END_LEFT]);\n    mesh.vblayout.instFlags4b = { offset: 0, itemSize: 4, bytesPerItem: 1, divisor: 0, normalize: false };\n    mesh.vblayout.instFlags4b.array = instFlags.buffer;\n\n    var idx = mesh.indices = new Uint16Array(QUAD_TRIANGLE_INDICES);\n  } else {\n    mesh.indices = new Uint16Array(this.ib.buffer.slice(0, 2 * this.icount));\n  }\n\n  mesh.dbIds = this.dbIds;\n\n  var w = this.maxx - this.minx;\n  var h = this.maxy - this.miny;\n  var sz = Math.max(w, h);\n\n  mesh.boundingBox = {\n    min: { x: this.minx, y: this.miny, z: -sz * 1e-3 },\n    max: { x: this.maxx, y: this.maxy, z: sz * 1e-3 } };\n\n\n  //Also compute a rough bounding sphere\n  var bs = mesh.boundingSphere = {\n    center: {\n      x: 0.5 * (this.minx + this.maxx),\n      y: 0.5 * (this.miny + this.maxy),\n      z: 0.0 },\n\n    radius: 0.5 * Math.sqrt(w * w + h * h) };\n\n\n  return mesh;\n};\n\n// The following logic attempts to \"fix\" imprecisions in arc definitions introduced\n// by Heidi's fixed point math, in case that the extractor doesn't handle it correctly.\n\nvar fixUglyArc = function fixUglyArc(start, end)\n{\n  //Snap critical angles exactly\n  function snapCritical() {\n    function fuzzyEquals(a, b) {return Math.abs(a - b) < 1e-3;}\n\n    if (fuzzyEquals(start, 0)) start = 0.0;\n    if (fuzzyEquals(end, 0)) end = 0.0;\n    if (fuzzyEquals(start, TAU)) start = TAU;\n    if (fuzzyEquals(end, TAU)) end = TAU;\n  }\n\n  snapCritical();\n\n  //OK, in some cases the angles are both over-rotated...\n  if (start > end) {\n    while (start > TAU) {\n      start -= TAU;\n      end -= TAU;\n    }\n  } else {\n    while (end > TAU) {\n      start -= TAU;\n      end -= TAU;\n    }\n  }\n\n  //Snap critical angles exactly -- again\n  snapCritical();\n\n  //If the arc crosses the x axis, we have to make it clockwise...\n  //This is a side effect of bringing over-rotated arcs in range above.\n  //For example start = 5.0, end = 7.0 will result in start < 0 and end > 0,\n  //so we have to make start > end in order to indicate we are crossing angle = 0.\n  if (start < 0 && end > 0) {\n    start += TAU;\n  }\n\n  return { start: start, end: end };\n};","var TO_HEX = new Array(256);\nfor (var i = 0; i < 256; i++) {\n  var s = i.toString(16);\n  if (s.length === 1)\n  s = \"0\" + s;\n  TO_HEX[i] = s;\n}\n\n//Most common case is for SHA1 hashes, which are 20 bytes\nvar tmpArr20 = new Array(20);\n\nfunction getHexString(buffer, offset, length) {\n  var res = length === 20 ? tmpArr20 : [];\n\n  for (var i = 0; i < length; i++) {\n    var b = buffer[offset + i];\n    var s = TO_HEX[b];\n    res[i] = s;\n  }\n\n  return res.join(\"\");\n}\n\nvar tmpArr10 = new Array(10);\n\n//Converts the input byte array into a string of half the length\n//by packing two bytes into each string character (JS strings are two bytes per char)\nfunction getHexStringPacked(buffer, offset, length) {\n  var res = length === 20 ? tmpArr10 : [];\n\n  for (var i = 0; i < length; i += 2) {\n    var b0 = buffer[offset + i];\n    var b1 = buffer[offset + i + 1];\n    res[i / 2] = b1 << 8 | b0;\n  }\n\n  return String.fromCharCode.apply(null, res);\n}\n\n//Converts from UCS16 packed string (two bytes per character) to\n//regular ASCII string of 4x the length\nfunction unpackHexString(s) {\n  var res = s.length === 10 ? tmpArr20 : [];\n\n  for (var i = 0; i < s.length; i++) {\n    var bytes = s.charCodeAt(i);\n    res[2 * i] = TO_HEX[bytes & 0xff];\n    res[2 * i + 1] = TO_HEX[bytes >> 8 & 0xff];\n  }\n\n  return res.join(\"\");\n}\n\n\nfunction hexToDec(code) {\n  //0-9\n  if (code >= 48 && code <= 57) {\n    return code - 48;\n  }\n  //A-F\n  if (code >= 65 && code <= 70) {\n    return code - 55;\n  }\n  //a-f\n  if (code >= 97 && code <= 102) {\n    return code - 87;\n  }\n\n  return 0;\n}\n\n//Convert string in hex format, e.g. \"3498572abc\" to binary\nfunction hexToBin(str, buf, offset) {\n\n  //TODO: Add utility function that goes directly from packed to bin,\n  //instead of unopack, then convert to bin\n  var s = str.length === 10 ? unpackHexString(str) : str;\n\n  var j = offset;\n  for (var _i = 0; _i < s.length; _i += 2) {\n    var d1 = hexToDec(s.charCodeAt(_i));\n    var d2 = hexToDec(s.charCodeAt(_i + 1));\n    buf[j++] = d1 << 4 | d2;\n  }\n}\n\nmodule.exports = {\n  //getHexString,\n  getHexStringPacked: getHexStringPacked,\n  unpackHexString: unpackHexString,\n  hexToBin: hexToBin };","import { pathToURL, ViewingService } from \"../../net/Xhr\";\nimport { logger } from \"../../../logger/Logger\";\nimport { initPlacement, transformAnimations } from \"../common/SvfPlacementUtils\";\nimport { getHexStringPacked, unpackHexString } from './HashStrings';\nimport { LmvVector3 } from '../../../wgs/scene/LmvVector3';\nimport { MeshFlags } from '../../../wgs/scene/MeshFlags';\nimport { LmvBox3 } from '../../../wgs/scene/LmvBox3';\nimport { LmvMatrix4 } from '../../../wgs/scene/LmvMatrix4';\nimport { allocateUintArray } from \"../../../wgs/scene/IntArray\";\nimport { ProgressiveReadContext } from \"./ProgressiveReadContext\";\n\nexport var FLUENT_URN_PREFIX = \"urn:adsk.fluent:\";\nexport var DS_OTG_CDN_PREFIX = \"$otg_cdn$\";\n\n\nexport function OtgPackage() {\n\n\n  this.materials = null; //The materials json as it came from the SVF\n\n  this.fragments = null; //will be wrapped in a FragmentList\n\n  this.geompacks = [];\n\n  this.propertydb = {\n    attrs: [],\n    avs: [],\n    ids: [],\n    values: [],\n    offsets: [],\n\n    // Table to map between Svf and Otg ids.\n    // Note that the same db might be reused by a 2D sheet later. So, it's important to include dbid\n    // here as well, even if we don't use it for 3D.\n    dbid: [] };\n\n\n  this.bbox = null; //Overall scene bounds\n\n  this.animations = null; // animations json\n\n  this.pendingRequests = 0;\n\n  this.globalOffset = { x: 0, y: 0, z: 0 };\n\n  this.pendingRequests = 0;\n  this.initialLoadProgress = 0;\n\n  this.materialIdToHash = [];\n\n  this.aborted = false;\n}\n\nOtgPackage.prototype.getMaterialHash = function (materialIndex) {\n\n  var cached = this.materialIdToHash[materialIndex];\n  if (cached)\n  return cached;\n\n  // bytes per SHA1 hash\n  var stride = this.materialHashes.byteStride;\n\n  //get the hash string that points to the material\n  var matHash = getHexStringPacked(this.materialHashes.hashes, materialIndex * stride, stride);\n\n  this.materialIdToHash[materialIndex] = matHash;\n\n  return matHash;\n};\n\nOtgPackage.prototype.getGeometryHash = function (geomIndex) {\n\n  // bytes per SHA1 hash\n  var stride = this.geomMetadata.byteStride;\n\n  //get the hash string that points to the geometry\n  var gHash = getHexStringPacked(this.geomMetadata.hashes, geomIndex * stride, stride);\n\n  return gHash;\n};\n\n\n//Set up the fragments, materials, and meshes lists\n//which get filled progressively as we receive their data\nOtgPackage.prototype.initEmptyLists = function (loadContext) {\n\n  var svf = this;\n\n  var frags = svf.fragments = {};\n  frags.length = svf.metadata.stats.num_fragments;\n  frags.numLoaded = 0;\n  frags.boxes = loadContext.fragmentTransformsDouble ? new Float64Array(frags.length * 6) : new Float32Array(frags.length * 6);\n  frags.transforms = loadContext.fragmentTransformsDouble ? new Float64Array(frags.length * 12) : new Float32Array(frags.length * 12);\n  frags.materials = allocateUintArray(frags.length, svf.metadata.stats.num_materials);\n  frags.geomDataIndexes = allocateUintArray(frags.length, svf.metadata.stats.num_geoms);\n  frags.fragId2dbId = new Int32Array(frags.length);\n  frags.visibilityFlags = new Uint8Array(frags.length);\n  frags.mesh2frag = {};\n  frags.topoIndexes = null;\n\n  svf.geomMetadata = {\n    hashes: null,\n    byteStride: 0,\n    version: 0,\n    numLoaded: 0,\n    hashToIndex: {} };\n\n\n  svf.materialHashes = {\n    hashes: null,\n    byteStride: 0,\n    version: 0,\n    numLoaded: 0 };\n\n\n  //Shell object to make it compatible with SVF.\n  //Not sure which parts of this are really needed,\n  //SceneUnit is one.\n  svf.materials = {\n    \"name\": \"LMVTK Simple Materials\",\n    \"version\": \"1.0\",\n    \"scene\": {\n      \"SceneUnit\": 8215,\n      \"YIsUp\": 0 },\n\n    materials: {} };\n\n\n\n};\n\n\nOtgPackage.prototype.loadAsyncResource = function (loadContext, resourcePath, responseType, callback) {\n\n  //Launch an XHR to load the data from external file\n  var svf = this;\n\n  this.pendingRequests++;\n\n  function xhrCB(responseData) {\n    svf.pendingRequests--;\n\n    callback(responseData);\n  }\n\n  resourcePath = pathToURL(resourcePath, loadContext.basePath);\n\n  ViewingService.getItem(loadContext, resourcePath, xhrCB, loadContext.onFailureCallback,\n  { responseType: responseType || \"arraybuffer\" });\n\n\n};\n\n\nOtgPackage.prototype.loadAsyncProgressive = function (loadContext, resourcePath, ctx, resourceName, onFailureCallback) {\n\n  var svf = this;\n\n  resourcePath = pathToURL(resourcePath, loadContext.basePath);\n\n  function onDone(data, receivedLength) {\n\n    ctx.onEnd(data, receivedLength);\n\n    svf.postLoad(loadContext, resourceName, ctx, data);\n  }\n\n  function onProgress(receiveBuffer, receivedLength) {\n\n    if (svf.aborted) {\n      return true;\n    }\n\n    //Read as many fragments as we can at this time\n    ctx.onData(receiveBuffer, receivedLength, false);\n  }\n\n\n  ViewingService.getItem(loadContext, resourcePath, onDone, onFailureCallback || loadContext.onFailureCallback,\n  {\n    responseType: \"text\",\n    onprogress: onProgress });\n\n\n\n};\n\n\nOtgPackage.prototype.loadMetadata = function (loadContext, path) {\n\n  var svf = this;\n\n  this.loadAsyncResource(loadContext, path, \"json\", function (data) {\n\n    //For OTG, there is a single JSON for metadata and manifest,\n    //and it's the root\n    svf.metadata = data;\n    svf.manifest = svf.metadata.manifest;\n\n    // Set numGeoms. Note that this must happen before creating the GeometryList.\n    svf.numGeoms = svf.metadata.stats.num_geoms;\n\n    svf.processMetadata(loadContext);\n\n    svf.initEmptyLists(loadContext);\n\n    var manifest = svf.metadata.manifest;\n\n    //Add the shared property db files to the property db manifest\n    //TODO: this is a bit hacky and hardcoded\n    var spdb = manifest.shared_assets.pdb;\n    for (var p in spdb) {\n      if (svf.propertydb[p])\n      svf.propertydb[p].push({ path: spdb[p], isShared: true });else\n      {\n        //Skip this property db file from the list,\n        //we don't know how to handle it.\n      }\n\n    }\n\n    var pdb = manifest.assets.pdb;\n    for (var p in pdb) {\n      if (svf.propertydb[p])\n      svf.propertydb[p].push({ path: pdb[p], isShared: false });else\n      {\n        //Skip this property db file from the list,\n        //we don't know how to handle it.\n      }\n    }\n\n    //Optional resources\n\n    if (manifest.assets.animations) {\n      svf.loadAsyncResource(loadContext, manifest.assets.animations, \"json\", function (data) {\n        svf.animations = data;\n        transformAnimations(svf);\n      });\n    }\n\n    if (manifest.assets.topology) {\n      svf.loadAsyncResource(loadContext, path, \"json\", function (data) {\n        svf.topology = data;\n      });\n    }\n\n    loadContext.onLoaderEvent(\"otg_root\");\n    svf.postLoad(loadContext, \"metadata\");\n  });\n\n};\n\n\nOtgPackage.prototype.loadFragmentList = function (loadContext, path) {\n\n  var svf = this;\n\n  var _t = new LmvVector3();\n  var _s = new LmvVector3();\n  var _q = { x: 0, y: 0, z: 0, w: 1 };\n  var _m = new LmvMatrix4(true);\n  var _b = new LmvBox3();\n  var _zero = { x: 0, y: 0, z: 0 };\n\n  function readOneFragment(ctx, i) {\n\n    //The index is 1-based (due to the record at index 0 being the file header\n    //while the runtime FragmentList is a classic 0-based array, so we subtract 1 here.\n    i -= 1;\n\n    //Fragments have ot wait for the metadata (placement transform)\n    //before they can be fully processed\n    if (!svf.metadata)\n    return false;\n\n    var idata = ctx.idata();\n    var fdata = ctx.fdata();\n    var offset = 0;\n\n    var frags = svf.fragments;\n    var meshid = frags.geomDataIndexes[i] = idata[offset];\n    var materialId = frags.materials[i] = idata[offset + 1];\n    var dbId = frags.fragId2dbId[i] = idata[offset + 2];\n    var flags = idata[offset + 3];\n\n    //check if the fragment's material and geometry hashes are already known\n    //If not, then pause fragment processing until they are\n    //NOTE: mesh ID and material ID are 1-based indices.\n    if (meshid > svf.geomMetadata.numLoaded ||\n    materialId > svf.materialHashes.numLoaded) {\n      //console.log(\"Delayed fragment\", i);\n      return false;\n    }\n\n    //Add the fragment's mesh to the reverse mapping of geom->fragment\n    var meshRefs = frags.mesh2frag[meshid];\n    if (meshRefs === undefined) {\n      //If it's the first fragments for this mesh,\n      //store the index directly -- most common case.\n      frags.mesh2frag[meshid] = i;\n    } else\n    if (!Array.isArray(meshRefs)) {\n      //otherwise put the fragments that\n      //reference the mesh into an array\n      frags.mesh2frag[meshid] = [meshRefs, i];\n    } else\n    {\n      //already is an array\n      meshRefs.push(i);\n    }\n\n    //Decode mesh flags (currently, we only support bitvalue 1 to mark hidden-by-default meshes)\n    //If a filter is specified, set the \"unloaded\" flag to prevent the mesh geometry from being loaded up front\n    var wantLoad = svf.dbIdFilter ? svf.dbIdFilter[dbId] : true;\n    var hideBit = !wantLoad || flags & 1 ? MeshFlags.MESH_NOTLOADED : 0;\n    frags.visibilityFlags[i] = hideBit;\n\n    var lo = svf.metadata.fragmentTransformsOffset || _zero;\n\n    //Read the fragment transform\n    var to = offset + 4;\n    _t.set(fdata[to + 0] + lo.x, fdata[to + 1] + lo.y, fdata[to + 2] + lo.z);\n    _q.x = fdata[to + 3];\n    _q.y = fdata[to + 4];\n    _q.z = fdata[to + 5];\n    _q.w = fdata[to + 6];\n    _s.set(fdata[to + 7], fdata[to + 8], fdata[to + 9]);\n\n    _m.compose(_t, _q, _s);\n\n    if (svf.placementWithOffset) {\n      _m.multiplyMatrices(svf.placementWithOffset, _m);\n    }\n\n    var e = _m.elements;\n    var dst = frags.transforms;\n    var off = i * 12;\n    dst[off + 0] = e[0];dst[off + 1] = e[1];dst[off + 2] = e[2];\n    dst[off + 3] = e[4];dst[off + 4] = e[5];dst[off + 5] = e[6];\n    dst[off + 6] = e[8];dst[off + 7] = e[9];dst[off + 8] = e[10];\n    dst[off + 9] = e[12];dst[off + 10] = e[13];dst[off + 11] = e[14];\n\n    //Estimated bounding box based on known unit box for the mesh, and the fragment's world transform\n    // These are just used temporarily for early rendering until we get the exact bboxes are obtained from BVHWorker.\n    // The estimated mostly work, but may be too large in some cases where the PCA axes do not match those of the minimum oriented bbox.\n    _b.min.x = -0.5;_b.min.y = -0.5;_b.min.z = -0.5;\n    _b.max.x = 0.5;_b.max.y = 0.5;_b.max.z = 0.5;\n    _b.applyMatrix4(_m);\n\n    // If we obtained the exact bboxes from BVHWorker already, don't overwrite them.\n    if (!frags.boxesLoaded) {\n      dst = frags.boxes;\n      off = i * 6;\n      dst[off + 0] = _b.min.x;\n      dst[off + 1] = _b.min.y;\n      dst[off + 2] = _b.min.z;\n      dst[off + 3] = _b.max.x;\n      dst[off + 4] = _b.max.y;\n      dst[off + 5] = _b.max.z;\n    }\n\n    frags.numLoaded = i + 1;\n\n    loadContext.onLoaderEvent(\"fragment\", i);\n\n    return true;\n  }\n\n\n  var ctx = new ProgressiveReadContext(readOneFragment, 13 * 4);\n  this.loadAsyncProgressive(loadContext, path, ctx, \"all_fragments\");\n\n  return ctx;\n};\n\nOtgPackage.prototype.handleHashListRequestFailures = function (loadContext) {\n\n  if (!this.metadata) {\n    // Model root not known yet => Retry later when model root is available\n    return;\n  }\n\n  // If the model is empty, the hash list files don't exist by design.\n  // For this case, we suppress the request failure error.\n  if (this.geomHashListFailure && this.metadata.stats.num_geoms > 0) {\n    loadContext.onFailureCallback.apply(loadContext, this.geomHashListFailure);\n  }\n\n  if (this.matHashListFailure && this.metadata.stats.num_materials > 0) {\n    loadContext.onFailureCallback.apply(loadContext, this.matHashListFailure);\n  }\n\n  this.geomHashListFailure = null;\n  this.matHashListFailure = null;\n};\n\nOtgPackage.prototype.loadGeometryHashList = function (loadContext, path) {\n\n  var svf = this;\n\n  function readOneHash(ctx, i) {\n\n    //have ot wait for the metadata\n    //before they can be fully processed\n    if (!svf.metadata)\n    return false;\n\n    if (!svf.geomMetadata.hashes) {\n      svf.geomMetadata.hashes = new Uint8Array(ctx.byteStride() * (svf.numGeoms + 1));\n      svf.geomMetadata.byteStride = ctx.byteStride();\n      svf.geomMetadata.version = ctx.version();\n    }\n\n    svf.geomMetadata.hashes.set(ctx.bdata(), i * ctx.byteStride());\n\n    //this is curretly set by the OtgLoader\n    //\t\tsvf.geomMetadata.hashToIndex[] = i;\n\n    svf.geomMetadata.numLoaded = i;\n\n    return true;\n  }\n\n  // Hash list request error handling is deferred until model root is known\n  var onFailure = function onFailure() {\n    svf.geomHashListFailure = arguments;\n    svf.handleHashListRequestFailures(loadContext);\n    svf.postLoad(loadContext, \"geometry_ptrs\", ctx); // Finish hash-list loading state\n  };\n\n  var ctx = new ProgressiveReadContext(readOneHash, 20);\n  this.loadAsyncProgressive(loadContext, path, ctx, \"geometry_ptrs\", onFailure);\n\n  return ctx;\n};\n\nOtgPackage.prototype.loadMaterialHashList = function (loadContext, path) {\n\n  var svf = this;\n\n  function readOneHash(ctx, i) {\n\n    //have ot wait for the metadata\n    //before they can be fully processed\n    if (!svf.metadata)\n    return false;\n\n    if (!svf.materialHashes.hashes) {\n      svf.numMaterials = svf.metadata.stats.num_materials;\n      svf.materialHashes.hashes = new Uint8Array(ctx.byteStride() * (svf.numMaterials + 1));\n      svf.materialHashes.byteStride = ctx.byteStride();\n      svf.materialHashes.version = ctx.version();\n    }\n\n    svf.materialHashes.hashes.set(ctx.bdata(), i * ctx.byteStride());\n\n    svf.materialHashes.numLoaded = i;\n\n    return true;\n  }\n\n  // Hash list request error handling is deferred until model root is known\n  var onFailure = function onFailure() {\n    svf.matHashListFailure = arguments;\n    svf.handleHashListRequestFailures(loadContext);\n    svf.postLoad(loadContext, \"material_ptrs\", ctx); // Finish hash-list loading state\n  };\n\n  var ctx = new ProgressiveReadContext(readOneHash, 20);\n  this.loadAsyncProgressive(loadContext, path, ctx, \"material_ptrs\", onFailure);\n\n  return ctx;\n};\n\n\nOtgPackage.prototype.processMetadata = function (loadContext) {\n\n  var svf = this;\n\n  var metadata = svf.metadata;\n\n  initPlacement(svf, loadContext);\n  var pt = svf.placementWithOffset;\n\n  if (metadata.cameras) {\n    svf.cameras = metadata.cameras;\n\n    if (pt) {\n      for (var i = 0; i < svf.cameras.length; i++) {\n        var cam = svf.cameras[i];\n        cam.position = new LmvVector3(cam.position.x, cam.position.y, cam.position.z);\n        cam.position.applyMatrix4(pt);\n        cam.target = new LmvVector3(cam.target.x, cam.target.y, cam.target.z);\n        cam.target.applyMatrix4(pt);\n\n        cam.up = new LmvVector3(cam.up.x, cam.up.y, cam.up.z);\n        cam.up.transformDirection(pt);\n      }\n    }\n  }\n\n};\n\n\nOtgPackage.prototype.beginLoad = function (loadContext, otgPath) {\n\n  this.loadMetadata(loadContext, otgPath);\n\n  var ids = loadContext.objectIds;\n  if (ids) {\n    this.dbIdFilter = {};\n    for (var i = 0, iEnd = ids.length; i < iEnd; i++) {\n      this.dbIdFilter[ids[i]] = 1;\n    }\n  }\n\n  //These are fundamental and always there.\n  //Because the file names are fixed, we can kick off those requests together with the root json.\n  //TODO: This needs to be revised in case the filenames become variable (i.e. wait\n  //until we can get them from metadata.manifest.assets.\n  /*\r\n  this.loadMaterialHashList(loadContext, manifest.assets.materials_ptrs);\r\n  this.loadGeometryHashList(loadContext, manifest.assets.geometry_ptrs);\r\n  this.loadFragmentList(loadContext, manifest.assets.fragments);\r\n  */\n  this.materialsCtx = this.loadMaterialHashList(loadContext, \"materials_ptrs.hl\");\n  this.geometryCtx = this.loadGeometryHashList(loadContext, \"geometry_ptrs.hl\");\n  this.fragmentsCtx = this.loadFragmentList(loadContext, \"fragments.fl\");\n};\n\n\nOtgPackage.prototype.makeSharedResourcePath = function (cdnUrl, whichType, hash) {\n\n  //TODO: Make this logic preferentially use the CDN paths settings from the\n  //viewable manifest instead of the .shared_assets in the per-model settings.\n  //In general those will be equal though.\n\n  if (hash.length === 10)\n  hash = unpackHexString(hash);\n\n  if (cdnUrl) {\n\n    var shardChars = this.manifest.shared_assets.global_sharding || 0;\n\n    //The shard prefix is a number of character cut off from the hash\n    //string and brought to the beginning of the S3 key to improve S3 read\n    //preformance.\n    var fname = hash;\n    var shardPrefix = \"\";\n    if (shardChars) {\n      shardPrefix = \"/\" + hash.slice(0, shardChars);\n      fname = hash.slice(shardChars);\n    }\n\n    //This prefix is an account ID hash, plus a relative path\n    //that is one of /t /g or /m (texture, geometry, material)\n    var prefix = this.manifest.shared_assets[whichType];\n\n    if (prefix.indexOf(FLUENT_URN_PREFIX) === 0 || prefix.indexOf(DS_OTG_CDN_PREFIX) === 0) {\n      //The CDN bucket name is the first string after the last \":\", so skip that too,\n      //by slicing up to the first slash\n      prefix = prefix.slice(prefix.indexOf(\"/\"));\n    } else {\n      //it can be a relative path in case of local testing data\n      //TODO: not sure this branch will ever get hit\n      var split = prefix.split(\"/\");\n      prefix = \"/\" + (split[split.length - 1] || split[split.length - 2]) + \"/\";\n    }\n\n    return cdnUrl + shardPrefix + prefix + fname;\n\n  } else {\n    //Locally stored data (testing only) defaults to sharding size of 2 chars\n    var shardChars = this.manifest.shared_assets.global_sharding || 2;\n\n    var fname = hash;\n    var shardPrefix = \"\";\n    if (shardChars) {\n      shardPrefix = \"/\" + hash.slice(0, shardChars) + \"/\";\n      fname = hash.slice(shardChars);\n    }\n\n    var modelBasePath = pathToURL(this.basePath);\n    return modelBasePath + this.manifest.shared_assets[whichType] + shardPrefix + fname;\n  }\n};\n\nOtgPackage.prototype.postLoad = function (loadContext, what, ctx, data) {\n\n  if (what) {\n    //console.log(\"what\", what);\n    this.initialLoadProgress++;\n  }\n\n  //If required files are loaded, continue with the next\n  //step of the load sequence\n  if (this.initialLoadProgress === 4) {\n\n    //Finish processing the data streams in order of dependcy\n\n    this.materialsCtx.flush();\n    this.geometryCtx.flush();\n    this.fragmentsCtx.flush();\n\n    this.materialsCtx = null;\n    this.geometryCtx = null;\n    this.fragmentsCtx = null;\n\n    if (this.fragments.numLoaded < this.metadata.stats.num_fragments)\n    logger.warn(\"Fragments actually loaded fewer than expected.\");\n\n    loadContext.onLoaderEvent(\"all_fragments\");\n  } else {\n    //In rare cases (especially node.js use), one of the content\n    //files can appear before the metadata json is loaded.\n    //so we have to do a flush when the metadata arrives in order\n    //to get the processing unstuck (since readOne bails if there is no metadata).\n    if (what === \"metadata\") {\n      this.materialsCtx.flush();\n      this.geometryCtx.flush();\n      this.fragmentsCtx.flush();\n    }\n  }\n};\n\n\nOtgPackage.prototype.abort = function () {\n  this.aborted = true;\n};","\nimport { isNodeJS } from \"../../../compat\";\nimport { InputStream } from \"../common/InputStream\";\nimport { LmvBox3 } from \"../../../wgs/scene/LmvBox3\";\n\n/*\n                                                      Integers encoded in *little endian*\n                                                      \n                                                      Magic header: LMV0 (4 bytes)\n                                                      Flags: 2 bytes (isLine, isPoint, isWideLine, etc.)\n                                                      Num buffers: 1 byte\n                                                      Num attributes: 1 byte (attributes are fixed size)\n                                                      Buf Offsets (from beginning of data block, first buffer is always at 0, so is skipped): 4 bytes each\n                                                      Attributes: {\n                                                      \tName: 1 byte enum (Index, IndexEdges, Position, Normal, TextureUV, Color)\n                                                      \titemSize: 1/2 byte low nibble (must be 1,2,3 or 4)\n                                                      \titemType: 1/2 byte hi nibble (BYTE, SHORT, UBYTE, USHORT, FLOAT ...)\n                                                      \titemOffset: 1 byte (in bytes)\n                                                      \titemStride: 1 byte (stride in bytes)\n                                                      \tbuffer Idx: 1 bytes\n                                                      } (5 bytes each)\n                                                      \n                                                      (padding bytes to make data stream offset a multiple of 4)\n                                                      \n                                                      Data: binary, concatenated vertex and index streams\n                                                      */\n\nvar AttributeName = {\n  Index: 0,\n  IndexEdges: 1,\n  Position: 2,\n  Normal: 3,\n  TextureUV: 4,\n  Color: 5 };\n\n\nvar AttributeType = {\n  BYTE: 0,\n  SHORT: 1,\n  UBYTE: 2,\n  USHORT: 3,\n\n  BYTE_NORM: 4,\n  SHORT_NORM: 5,\n  UBYTE_NORM: 6,\n  USHORT_NORM: 7,\n\n  FLOAT: 8,\n  INT: 9,\n  UINT: 10\n  //DOUBLE: 11\n};\n\n\nvar MeshFlags = {\n  //NOTE: Lower two bits are NOT A BITMASK!!!\n  TRIANGLES: 0,\n  LINES: 1,\n  POINTS: 2,\n  WIDE_LINES: 3 };\n\n\n\n\n\nvar LMV2OTGAttr = {\n  \"position\": AttributeName.Position,\n  \"normal\": AttributeName.Normal,\n  \"index\": AttributeName.Index,\n  \"indexlines\": AttributeName.IndexEdges,\n  \"color\": AttributeName.Color };\n\n\nvar OTG2LMVAttr = {};\nOTG2LMVAttr[AttributeName.Position] = \"position\";\nOTG2LMVAttr[AttributeName.Normal] = \"normal\";\nOTG2LMVAttr[AttributeName.Index] = \"index\";\nOTG2LMVAttr[AttributeName.IndexEdges] = \"indexlines\";\nOTG2LMVAttr[AttributeName.Color] = \"color\";\nOTG2LMVAttr[AttributeName.TextureUV] = \"uv\";\n\n\nvar AttributeTypeToSize = {};\nAttributeTypeToSize[AttributeType.BYTE] = 1;\nAttributeTypeToSize[AttributeType.SHORT] = 2;\nAttributeTypeToSize[AttributeType.UBYTE] = 1;\nAttributeTypeToSize[AttributeType.USHORT] = 2;\nAttributeTypeToSize[AttributeType.BYTE_NORM] = 1;\nAttributeTypeToSize[AttributeType.SHORT_NORM] = 2;\nAttributeTypeToSize[AttributeType.UBYTE_NORM] = 1;\nAttributeTypeToSize[AttributeType.USHORT_NORM] = 2;\nAttributeTypeToSize[AttributeType.FLOAT] = 4;\nAttributeTypeToSize[AttributeType.INT] = 4;\nAttributeTypeToSize[AttributeType.UINT] = 4;\n//DOUBLE: 11\n\n\n\nfunction rotate(tri) {\n  var tmp = tri[0];\n  tri[0] = tri[1];\n  tri[1] = tri[2];\n  tri[2] = tmp;\n}\n\nfunction deltaEncodeIndexBuffer3(ib) {\n\n  var triangles = [];\n\n  for (var i = 0; i < ib.length; i += 3) {\n    triangles.push(\n    [ib[i], ib[i + 1], ib[i + 2]]);\n\n  }\n\n  //Sort the indices for each triangle so that\n  //the first one is smallest\n  for (var i = 0; i < triangles.length; i++) {\n    var t = triangles[i];\n\n    while (t[0] > t[1] || t[0] > t[2]) {\n      rotate(t);\n    }\n  }\n\n  //Sort triangles by ascending first index\n  triangles.sort(function (a, b) {\n    return a[0] - b[0];\n  });\n\n  //Delta encode the indices\n  var t = triangles[0];\n  var j = 0;\n  ib[j] = t[0];\n  ib[j + 1] = t[1] - t[0];\n  ib[j + 2] = t[2] - t[0];\n  j += 3;\n\n  for (var i = 1; i < triangles.length; i++, j += 3) {\n    t = triangles[i];\n\n    ib[j] = t[0] - triangles[i - 1][0];\n    ib[j + 1] = t[1] - t[0];\n    ib[j + 2] = t[2] - t[0];\n  }\n\n}\n\nfunction deltaEncodeIndexBuffer2(ib) {\n\n  var lines = [];\n\n  for (var i = 0; i < ib.length; i += 2) {\n    lines.push(\n    [ib[i], ib[i + 1]]);\n\n  }\n\n  //Sort the indices for each triangle so that\n  //the first one is smallest\n  for (var i = 0; i < lines.length; i++) {\n    var t = lines[i];\n\n    if (t[0] > t[1]) {\n      var tmp = t[0];\n      t[0] = t[1];\n      t[1] = tmp;\n    }\n  }\n\n  //Sort lines by ascending first index\n  lines.sort(function (a, b) {\n    return a[0] - b[0];\n  });\n\n  //Delta encode the indices\n  var t = lines[0];\n  var j = 0;\n  ib[j] = t[0];\n  ib[j + 1] = t[1] - t[0];\n  j += 2;\n\n  for (var i = 1; i < lines.length; i++, j += 2) {\n    t = lines[i];\n\n    ib[j] = t[0] - lines[i - 1][0];\n    ib[j + 1] = t[1] - t[0];\n  }\n\n}\n\n\nfunction deltaDecodeIndexBuffer3(ib) {\n\n  if (!ib.length)\n  return;\n\n  ib[1] += ib[0];\n  ib[2] += ib[0];\n\n  for (var i = 3; i < ib.length; i += 3) {\n    ib[i] += ib[i - 3];\n    ib[i + 1] += ib[i];\n    ib[i + 2] += ib[i];\n  }\n}\n\nfunction deltaDecodeIndexBuffer2(ib) {\n\n  if (!ib.length)\n  return;\n\n  ib[1] += ib[0];\n\n  for (var i = 2; i < ib.length; i += 2) {\n    ib[i] += ib[i - 2];\n    ib[i + 1] += ib[i];\n  }\n}\n\nfunction attrNameMapper(attributeName) {\n\n  var name = LMV2OTGAttr[attributeName];\n  if (typeof name !== \"undefined\")\n  return name;\n\n  if (attributeName.indexOf(\"uv\") === 0) {\n    return AttributeName.TextureUV;\n  }\n\n  console.warn(\"Unknown attribute name\");\n  return AttributeName.TextureUV;\n}\n\n\nfunction attrNameToLMV(attrName) {\n\n  var lmvAttr = OTG2LMVAttr[attrName];\n  if (lmvAttr)\n  return lmvAttr;\n\n  console.error(\"Unknown vertex attribute\");\n  return AttributeName.TextureUV;\n}\n\n\nfunction attrTypeMapper(attr) {\n\n  var type = AttributeType.FLOAT;\n\n  var itemWidth = attr.bytesPerItem || 4;\n  if (itemWidth === 1) {\n    type = attr.normalize ? AttributeType.UBYTE_NORM : AttributeType.UBYTE;\n  } else if (itemWidth === 2) {\n    type = attr.normalize ? AttributeType.USHORT_NORM : AttributeType.USHORT;\n  }\n\n  return type << 4 | attr.itemSize & 0xf;\n}\n\nfunction indexTypeMapper(attr) {\n  var type = AttributeType.USHORT;\n\n  var itemWidth = attr.bytesPerItem || 2;\n  if (itemWidth === 1) {\n    type = AttributeType.UBYTE;\n  } else if (itemWidth === 2) {\n    type = AttributeType.USHORT;\n  } else if (itemWidth === 4) {\n    type = AttributeType.UINT;\n  }\n\n  return type << 4 | attr.itemSize & 0xf;\n}\n\n\nfunction OtgGeomEncoder() {\n}\n\n\nOtgGeomEncoder.prototype.beginHeader = function (meshFlag, numAttributes, dataStreamLengths) {\n  var headerSize = 8;\n\n  var numBuffers = dataStreamLengths.length;\n  headerSize += (numBuffers - 1) * 4;\n\n  headerSize += numAttributes * 5;\n\n  while (headerSize % 4 !== 0) {\n    headerSize++;\n  }\n\n  var totalDataSize = 0;\n  for (var i = 0; i < dataStreamLengths.length; i++) {\n    totalDataSize += dataStreamLengths[i];}\n\n  this.buffer = Buffer.alloc(headerSize + totalDataSize);\n  this.writeOffset = 0;\n\n  //Write the 4 byte magic prefix\n  var MAGIC = \"OTG0\";\n  for (var i = 0; i < 4; i++) {\n    this.writeOffset = this.buffer.writeUInt8(MAGIC.charCodeAt(i), this.writeOffset);\n  }\n\n  //TODO: line width if wide lines and pointSize if points\n\n  this.writeOffset = this.buffer.writeUInt16LE(meshFlag, this.writeOffset);\n\n  this.writeOffset = this.buffer.writeUInt8(numBuffers, this.writeOffset);\n\n  this.writeOffset = this.buffer.writeUInt8(numAttributes, this.writeOffset);\n\n  //write buffer offsets from the beginning of the binary data block\n  //Skip the first buffer as its at offset zero\n  var offset = dataStreamLengths[0];\n  for (var i = 1; i < dataStreamLengths.length; i++) {\n    this.writeOffset = this.buffer.writeUInt32LE(offset, this.writeOffset);\n    offset += dataStreamLengths[i];\n  }\n};\n\nOtgGeomEncoder.prototype.addAttribute = function (attrName, attr, stride, bufferIndex) {\n  this.writeOffset = this.buffer.writeUInt8(attrName, this.writeOffset);\n\n  if (attrName === AttributeName.Index || attrName === AttributeName.IndexEdges) {\n\n    this.writeOffset = this.buffer.writeUInt8(indexTypeMapper(attr), this.writeOffset);\n\n    this.writeOffset = this.buffer.writeUInt8((attr.itemOffset || 0) * 4, this.writeOffset); //itemOffset\n    this.writeOffset = this.buffer.writeUInt8((stride || 0) * 4, this.writeOffset); //itemStride\n\n    this.writeOffset = this.buffer.writeUInt8(bufferIndex, this.writeOffset); //buffer index\n  } else {\n    this.writeOffset = this.buffer.writeUInt8(attrTypeMapper(attr), this.writeOffset);\n\n    this.writeOffset = this.buffer.writeUInt8((attr.itemOffset || 0) * 4, this.writeOffset); //itemOffset (LMV stores in multiples of 4)\n    this.writeOffset = this.buffer.writeUInt8((stride || 0) * 4, this.writeOffset); //itemStride (LMV stores in multiples of 4)\n\n    this.writeOffset = this.buffer.writeUInt8(bufferIndex, this.writeOffset); //buffer index\n  }\n};\n\n\nOtgGeomEncoder.prototype.endHeader = function () {\n  //Padding so that buffers are written at multiple of 4\n  while (this.writeOffset % 4 !== 0) {\n    this.writeOffset = this.buffer.writeUInt8(0, this.writeOffset);\n  }\n};\n\nOtgGeomEncoder.prototype.addBuffer = function (buffer) {\n  buffer.copy(this.buffer, this.writeOffset);\n  this.writeOffset += buffer.length;\n};\n\n\nOtgGeomEncoder.prototype.end = function () {\n  if (this.writeOffset !== this.buffer.length) {\n    console.error(\"Incorrect encoding buffer size\");\n  }\n\n  return this.buffer;\n};\n\n\n\nfunction OtgGeomDecoder(buf) {\n\n  this.buffer = buf;\n  this.readOffset = 0;\n\n  this.meshFlag = 0;\n  this.numBuffers = 0;\n  this.numAttributes = 0;\n  this.bufferOffsets = [];\n  this.attributes = [];\n  this.buffers = [];\n}\n\n\nOtgGeomDecoder.prototype.readNodeJS = function () {\n\n  var magic = this.buffer.toString(\"ascii\", 0, 4);\n  if (magic !== \"OTG0\") {\n    console.error(\"Invalid OTG header\");\n    return false;\n  }\n\n  this.readOffset = 4;\n\n  this.meshFlag = this.buffer.readUInt16LE(this.readOffset);\n  this.readOffset += 2;\n\n  this.numBuffers = this.buffer.readUInt8(this.readOffset);\n  this.readOffset++;\n\n  this.numAttributes = this.buffer.readUInt8(this.readOffset);\n  this.readOffset++;\n\n  if (this.numBuffers) {\n    this.bufferOffsets.push(0);\n\n    for (var i = 1; i < this.numBuffers; i++) {\n      var boff = this.buffer.readUInt32LE(this.readOffset);\n      this.readOffset += 4;\n      this.bufferOffsets.push(boff);\n    }\n  }\n\n  for (var i = 0; i < this.numAttributes; i++) {\n    var attr = {};\n\n    attr.name = this.buffer.readUInt8(this.readOffset);\n    this.readOffset++;\n\n    var type = this.buffer.readUInt8(this.readOffset);\n    this.readOffset++;\n\n    attr.itemSize = type & 0xf;\n    attr.type = type >> 4;\n\n    attr.bytesPerItem = AttributeTypeToSize[attr.type];\n\n    attr.normalize = attr.type === AttributeType.BYTE_NORM ||\n    attr.type === AttributeType.SHORT_NORM ||\n    attr.type === AttributeType.UBYTE_NORM ||\n    attr.type === AttributeType.USHORT_NORM;\n\n\n    attr.itemOffset = this.buffer.readUInt8(this.readOffset) / 4;\n    this.readOffset++;\n\n    attr.itemStride = this.buffer.readUInt8(this.readOffset) / 4;\n    this.readOffset++;\n\n    attr.bufferIndex = this.buffer.readUInt8(this.readOffset);\n    this.readOffset++;\n\n    this.attributes.push(attr);\n  }\n\n  //seek to the beginning of the buffer data\n  while (this.readOffset % 4 !== 0) {\n    this.readOffset++;}\n\n  for (var i = 0; i < this.bufferOffsets.length; i++) {\n\n    var startOffset = this.readOffset + this.bufferOffsets[i];\n    var endOffset;\n\n    if (i < this.bufferOffsets.length - 1) {\n      endOffset = this.readOffset + this.bufferOffsets[i + 1];\n    } else {\n      endOffset = this.buffer.length;\n    }\n\n    this.buffers.push(this.buffer.slice(startOffset, endOffset));\n  }\n\n  return true;\n};\n\n\nOtgGeomDecoder.prototype.readWeb = function () {\n\n  var stream = new InputStream(this.buffer);\n\n  var magic = stream.getString(4);\n  if (magic !== \"OTG0\") {\n    console.error(\"Invalid OTG header\");\n    return false;\n  }\n\n\n  this.meshFlag = stream.getUint16();\n  this.numBuffers = stream.getUint8();\n  this.numAttributes = stream.getUint8();\n\n  if (this.numBuffers) {\n    this.bufferOffsets.push(0);\n\n    for (var i = 1; i < this.numBuffers; i++) {\n      var boff = stream.getUint32();\n      this.bufferOffsets.push(boff);\n    }\n  }\n\n  for (var i = 0; i < this.numAttributes; i++) {\n    var attr = {};\n\n    attr.name = stream.getUint8();\n\n    var type = stream.getUint8();\n\n    attr.itemSize = type & 0xf;\n    attr.type = type >> 4;\n\n    attr.bytesPerItem = AttributeTypeToSize[attr.type];\n\n    attr.normalize = attr.type === AttributeType.BYTE_NORM ||\n    attr.type === AttributeType.SHORT_NORM ||\n    attr.type === AttributeType.UBYTE_NORM ||\n    attr.type === AttributeType.USHORT_NORM;\n\n\n    attr.itemOffset = stream.getUint8() / 4;\n\n    attr.itemStride = stream.getUint8() / 4;\n\n    attr.bufferIndex = stream.getUint8();\n\n    this.attributes.push(attr);\n  }\n\n  //seek to the beginning of the buffer data\n  while (stream.offset % 4 !== 0) {\n    stream.offset++;}\n\n  for (var i = 0; i < this.bufferOffsets.length; i++) {\n\n    var startOffset = stream.offset + this.bufferOffsets[i];\n    var endOffset;\n\n    if (i < this.bufferOffsets.length - 1) {\n      endOffset = stream.offset + this.bufferOffsets[i + 1];\n    } else {\n      endOffset = stream.byteLength;\n    }\n\n    this.buffers.push(this.buffer.subarray(startOffset, endOffset));\n  }\n\n  return true;\n};\n\n\nOtgGeomDecoder.prototype.read = function () {\n\n  if (isNodeJS() && this.buffer instanceof Buffer) {\n    return this.readNodeJS();\n  } else {\n    return this.readWeb();\n  }\n};\n\n\n\nexport function serializeLmvBufferGeom(geom) {\n\n  var otgEncoder = new OtgGeomEncoder();\n\n  //Check for interleaved buffer. For now\n  //this is the only one we support\n  var bufSizes = [];\n  if (!geom.vb) {\n    console.error(\"Unexpected non-interleaved vertex buffer\");\n    return null;\n  } else {\n    bufSizes = [geom.vb.byteLength, geom.ib.byteLength];\n\n    if (geom.iblines) {\n      bufSizes.push(geom.iblines.byteLength);\n    }\n  }\n\n  var attrKeys = Object.keys(geom.attributes);\n\n  var meshFlag = 0;\n  if (geom.isLines)\n  meshFlag = meshFlag | MeshFlags.LINES;\n  if (geom.isWideLines)\n  meshFlag = meshFlag | MeshFlags.WIDE_LINES;\n  if (geom.isPoints)\n  meshFlag = meshFlag | MeshFlags.POINTS;\n\n  otgEncoder.beginHeader(meshFlag, attrKeys.length, bufSizes);\n\n  //Write the attributes\n  for (var i = 0; i < attrKeys.length; i++) {\n    var attr = geom.attributes[attrKeys[i]];\n    var attrName = attrNameMapper(attrKeys[i]);\n\n    if (attrKeys[i] === \"index\") {\n      otgEncoder.addAttribute(attrName, attr, 0, 1);\n    } else if (attrKeys[i] === \"indexlines\") {\n      otgEncoder.addAttribute(attrName, attr, 0, 2);\n    } else {\n      otgEncoder.addAttribute(attrName, attr, geom.vbstride, 0);\n    }\n\n  }\n\n  otgEncoder.endHeader();\n\n  //Write the buffers\n\n  //Buffer 0\n  var tmp = Buffer.from(geom.vb.buffer, geom.vb.byteOffset, geom.vb.byteLength);\n  otgEncoder.addBuffer(tmp);\n\n  //Buffer 1\n  if (geom.isLines)\n  deltaEncodeIndexBuffer2(geom.ib);else\n\n  deltaEncodeIndexBuffer3(geom.ib);\n\n  tmp = Buffer.from(geom.ib.buffer, geom.ib.byteOffset, geom.ib.byteLength);\n  otgEncoder.addBuffer(tmp);\n\n  //Buffer 2\n  if (geom.iblines) {\n    deltaEncodeIndexBuffer2(geom.iblines);\n\n    tmp = Buffer.from(geom.iblines.buffer, geom.iblines.byteOffset, geom.iblines.byteLength);\n    otgEncoder.addBuffer(tmp);\n  }\n\n  var buf = otgEncoder.end();\n\n  return buf;\n}\n\n\n\nvar unitBox = new LmvBox3();\nunitBox.min.x = -0.5;\nunitBox.min.y = -0.5;\nunitBox.min.z = -0.5;\nunitBox.max.x = 0.5;\nunitBox.max.y = 0.5;\nunitBox.max.z = 0.5;\n\n//var unitSphere = new THREE.Sphere();\n//unitSphere.radius = Math.sqrt(0.5 * 0.5 * 3);\nvar unitSphere = {\n  center: { x: 0, y: 0, z: 0 },\n  radius: Math.sqrt(0.5 * 0.5 * 3) };\n\n\nexport function readLmvBufferGeom(buffer, skipEdges) {\n\n  var dec = new OtgGeomDecoder(buffer);\n\n  if (!dec.read()) {\n    console.error(\"Failed to parse OTG geometry\");\n    return null;\n  }\n\n  //Assumes the interleaved buffer serialization we use by default\n  //Maps the decoded data to the mdata/vblayout structures produced by\n  //the LMV loader worker threads. It's slightly different from the LmvBufferGeometry fields\n  var mesh = {\n    vblayout: {},\n    vb: new Float32Array(dec.buffers[0].buffer, dec.buffers[0].byteOffset, dec.buffers[0].byteLength / 4),\n    isLines: (dec.meshFlag & 0x3) === MeshFlags.LINES,\n    isWideLines: (dec.meshFlag & 0x3) === MeshFlags.WIDE_LINES,\n    isPoints: (dec.meshFlag & 0x3) === MeshFlags.POINTS,\n    boundingBox: unitBox,\n    boundingSphere: unitSphere };\n\n\n  //TODO: line width\n\n  for (var i = 0; i < dec.attributes.length; i++) {\n    var attr = dec.attributes[i];\n\n    if (attr.name === AttributeName.Index) {\n      var ib = dec.buffers[1];\n      if (attr.bytesPerItem === 1) {\n        mesh.indices = ib;\n      } else if (attr.bytesPerItem === 2) {\n        mesh.indices = new Uint16Array(ib.buffer, ib.byteOffset, ib.byteLength / attr.bytesPerItem);\n      } else if (attr.bytesPerItem === 4) {\n        mesh.indices = new Uint32Array(ib.buffer, ib.byteOffset, ib.byteLength / attr.bytesPerItem);\n      }\n\n      if (mesh.isLines)\n      deltaDecodeIndexBuffer2(mesh.indices);else\n\n      deltaDecodeIndexBuffer3(mesh.indices);\n    } else if (attr.name === AttributeName.IndexEdges) {\n      if (!skipEdges) {\n        var iblines = dec.buffers[2];\n        if (attr.bytesPerItem === 1) {\n          mesh.iblines = iblines;\n        } else if (attr.bytesPerItem === 2) {\n          mesh.iblines = new Uint16Array(iblines.buffer, iblines.byteOffset, iblines.byteLength / attr.bytesPerItem);\n        } else if (attr.bytesPerItem === 4) {\n          mesh.iblines = new Uint32Array(iblines.buffer, iblines.byteOffset, iblines.byteLength / attr.bytesPerItem);\n        }\n\n        deltaDecodeIndexBuffer2(mesh.iblines);\n      }\n    } else {\n      var lmvAttr = attrNameToLMV(attr.name);\n\n      if (!mesh.vbstride)\n      mesh.vbstride = attr.itemStride;else\n      {\n        //We expect all vertex attributes to be packed into one VB \n        if (mesh.vbstride !== attr.itemStride)\n        console.error(\"Unexpected vertex buffer stride mismatch.\");\n      }\n\n      if (attr.itemOffset >= attr.itemStride) {\n        //Some old (pre- October 2018) meshes have an extra UV attribute defined even though\n        //it's not physically in the vertex buffer data. We skip it here.\n        //If the attribute offset is out of bounds, we just ignore it.\n        //console.warn(\"Buggy OTG mesh. Ignoring out of bounds attribute\");\n      } else {\n        mesh.vblayout[lmvAttr] = {\n          bytesPerItem: attr.bytesPerItem,\n          offset: attr.itemOffset,\n          normalize: attr.normalize,\n          itemSize: attr.itemSize };\n\n      }\n    }\n\n  }\n\n  var mdata = {\n    mesh: mesh,\n    packId: 0,\n    meshIndex: 0 };\n\n\n  return mdata;\n\n}","function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}import { LmvVector3 as Vector3 } from \"../../../wgs/scene/LmvVector3\";\nimport { LmvBox3 as Box3 } from \"../../../wgs/scene/LmvBox3\";\nimport { CONTAINS, OUTSIDE } from \"../../../wgs/scene/FrustumIntersector\";\nimport { SceneMath } from \"../../../wgs/scene/SceneMath\";\n\n// Returns the surface area of a THREE.Box3.\nfunction getBoxSurfaceArea(box) {\n  var dx = box.max.x - box.min.x;\n  var dy = box.max.y - box.min.y;\n  var dz = box.max.z - box.min.z;\n  return 2.0 * (dx * dy + dy * dz + dz * dx);\n}\n\n/** Read fragment from Float32-Array (storing each box as 6 floats)\n   *  @param {Float32Array} boxes\n   *  @param {number}       index\n   *  @param {THREE.Box3}   outBox\n   *  @returns {THREE.Box3} outBox\n   */\nfunction readFragmentBox(boxes, index, outBox) {\n  var offset = 6 * index;\n  outBox.min.y = boxes[offset + 1];\n  outBox.min.z = boxes[offset + 2];\n  outBox.min.x = boxes[offset + 0];\n  outBox.max.x = boxes[offset + 3];\n  outBox.max.y = boxes[offset + 4];\n  outBox.max.z = boxes[offset + 5];\n  return outBox;\n}\n\n// Helper function to compare two THREE.Vector3\nfunction fuzzyEquals(a, b, eps) {\n  return (\n    Math.abs(a.x - b.x) < eps &&\n    Math.abs(a.y - b.y) < eps &&\n    Math.abs(a.z - b.z) < eps);\n\n}\n\n// Sort requests by decreasing importance\nfunction compareRequests(req1, req2) {\n  return req2.importance - req1.importance;\n}\n\n\nvar _tmpBox = new Box3();\n\n/**\n                           * @param {number}            fragId\n                           * @param {Float32Array}      boxes\n                           * @param {FrustumInersector} frustum\n                           */\nexport function computeFragImportance(fragId, boxes, frustum) {\n\n  // get fragment box\n  var fragBox = readFragmentBox(boxes, fragId, _tmpBox);\n\n  // frustum test\n  var cullResult = frustum.intersectsBox(fragBox);\n\n  // outside frustum => no importance\n  if (cullResult === OUTSIDE) {\n    return 0.0;\n  }\n\n  // Estimate projected area. For shapes fully inside the frustum, we can\n  // skip the clipping step.\n  var noClip = cullResult === CONTAINS;\n  var area = frustum.projectedBoxArea(fragBox, noClip);\n\n  var dist = SceneMath.pointToBoxDistance2(frustum.eye, fragBox);\n  dist = Math.max(dist, 0.01);\n\n  return area / dist;\n}\n\nexport function updateGeomImportance(model, fragId) {\n\n  // get geom and bbox of this fragment\n  var frags = model.getFragmentList();\n  var geom = frags.getGeometry(fragId);\n  frags.getWorldBounds(fragId, _tmpBox);\n\n  // Geoms may be null by design, if the original geometry was degenerated before OTG translation\n  if (!geom) {\n    return;\n  }\n\n  var oldImportance = geom.importance || 0;\n  var fragImportance = getBoxSurfaceArea(_tmpBox);\n  geom.importance = Math.max(oldImportance, fragImportance);\n}\n\nexport var OtgPriorityQueue = /*#__PURE__*/function () {\n\n  function OtgPriorityQueue() {_classCallCheck(this, OtgPriorityQueue);\n\n    this.viewers = [];\n\n    // If the number of requests in progress exceeds _maxRequests, all remaining ones are enqueued in this array.\n    // Requests outside the worker can be rearranged based on priority changes (if model visibility changes).\n    this.waitingTasks = []; // enqueued task messages to OtgLoadWorker, as defined in requestGeometry(...)\n\n    // Optional: Specifies hashes that should be loaded with maximum priority. (e.g., if quickly needed for a computation)\n    this.urgentHashes = {};\n\n    this.prevNumTasks = 0;\n    this.fullSortDone = false;\n\n    // Whenever the camera or set of visible models change, we have to update request priorities.\n    // These members are used to track relevant changes.\n    this.lastCamPos = {}; // map of Vector3, indexed by viewer.id\n    this.lastCamTarget = {}; // map of Vector3, indexed by viewer.id\n    this.lastVisibleModelIds = {}; // map of model ids, indexed by viewer.id, of all visible RenderModels that we considered for last update\n  }_createClass(OtgPriorityQueue, [{ key: \"addViewer\", value: function addViewer(\n\n    viewer) {\n      this.viewers.push(viewer);\n      this.lastCamPos[viewer.id] = new Vector3();\n      this.lastCamTarget[viewer.id] = new Vector3();\n      this.lastVisibleModelIds[viewer.id] = [];\n    } }, { key: \"removeViewer\", value: function removeViewer(\n\n    viewer) {\n      var index = this.viewers.indexOf(viewer);\n\n      if (index !== -1) {\n        delete this.lastCamPos[viewer.id];\n        delete this.lastCamTarget[viewer.id];\n        delete this.lastVisibleModelIds[viewer.id];\n        this.viewers.splice(index, 1);\n      }\n    }\n\n    // Checks if the camera has significantly changed\n  }, { key: \"checkCameraChanged\", value: function checkCameraChanged() {\n      var changed = false;\n\n      for (var i = 0; i < this.viewers.length; i++) {\n        var viewer = this.viewers[i];\n        // get current camera pos/target\n        var cam = viewer.impl.camera;\n        var newPos = cam.position;\n        var newTarget = cam.target;\n\n        var Tolerance = 0.01;\n        if (fuzzyEquals(this.lastCamPos[viewer.id], newPos, Tolerance) &&\n        fuzzyEquals(this.lastCamTarget[viewer.id], newTarget, Tolerance))\n        {\n          // no change\n          continue;\n        }\n\n        this.lastCamPos[viewer.id].copy(newPos);\n        this.lastCamTarget[viewer.id].copy(newTarget);\n\n        changed = true;\n      }\n\n      return changed;\n    }\n\n    // Checks if the set of visible models has changed\n  }, { key: \"checkModelsChanged\", value: function checkModelsChanged() {\n      var changed = false;\n\n      for (var i = 0; i < this.viewers.length; i++) {\n        var viewer = this.viewers[i];\n        // get currently visible models\n        var mq = viewer.impl.modelQueue();\n        var models = mq.getModels();\n\n        // Check if number of visible models changed\n        if (models.length !== this.lastVisibleModelIds[viewer.id].length) {\n          this.lastVisibleModelIds[viewer.id].length = models.length;\n          changed = true;\n        }\n\n        // Check if any element of visible models have changed\n        for (var j = 0; j < models.length; j++) {\n          var idOld = this.lastVisibleModelIds[viewer.id][j];\n          var idNew = models[j].id;\n          if (idOld !== idNew) {\n            this.lastVisibleModelIds[viewer.id][j] = idNew;\n            changed = true;\n          }\n        }\n      }\n\n      return changed;\n    }\n\n    // Checks for any relevant changes that require to recompute request priorities.\n    // If found, all requests are marked by the importanceNeedsUpdate flag.\n  }, { key: \"validateRequestPriorities\", value: function validateRequestPriorities() {\n\n      // check if camera or set of visible model have changed\n      var cameraChanged = this.checkCameraChanged();\n      var modelsChanged = this.checkModelsChanged();\n\n      if (cameraChanged || modelsChanged) {\n\n        // invalidate all task priorities\n        for (var i = 0; i < this.waitingTasks.length; i++) {\n          this.waitingTasks[i].importanceNeedsUpdate = true;\n        }\n      }\n    } }, { key: \"updateRequestPriorities\", value: function updateRequestPriorities()\n\n    {\n\n      // We track the time consumed for priority updates. If it exceeds the limit,\n      // we stop the updates and continue next cycle.\n      var updateStartTime = performance.now();\n      var TimeLimit = 10; // in ms\n\n      // Mark requests as outdated if any relevant changes occurred\n      this.validateRequestPriorities();\n\n      var frustums = {};\n      var models = [];\n\n      for (var i = 0; i < this.viewers.length; i++) {\n        var viewer = this.viewers[i];\n        var mq = viewer.impl.modelQueue();\n        var frustum = mq.frustum();\n        models = models.concat(mq.getModels()); // all models (excluding the hidden ones - which will not considered for importance)\n\n        // Make sure that FrustumIntersector is up-to-date.\n        frustum.reset(viewer.impl.camera);\n        frustums[viewer.id] = frustum;\n      }\n\n      // indicates if we stopped due to timeout\n      var timeOut = false;\n\n\n      var useFullSort = this.prevNumTasks === 0 || this.waitingTasks.length - this.prevNumTasks > 3000 || !this.fullSortDone;\n      this.fullSortDone = !useFullSort;\n      this.prevNumTasks = this.waitingTasks.length;\n\n      // Update importance for each waiting request\n      for (var i = 0; i < this.waitingTasks.length; i++) {\n\n        var task = this.waitingTasks[i];\n\n        // only do work for tasks that need it\n        if (!task.importanceNeedsUpdate) {\n          continue;\n        }\n\n        if (this.urgentHashes[task.hash]) {\n          task.importance = Infinity;\n          continue;\n        }\n\n        //Don't check the timer on every spin through the loop\n        //as it takes some time.\n        if (i % 10 === 0) {\n          var elapsed = performance.now() - updateStartTime;\n          if (elapsed > TimeLimit) {\n            timeOut = true;\n            break;\n          }\n        }\n\n        task.importanceNeedsUpdate = false;\n\n        // reset importance to 0.0, because we accumulate frag importances below\n        task.importance = 0.0;\n\n        var sumImportances = 0.0;\n\n        // find fragments of all visible models that use geomHash\n        var geomHash = task.hash;\n        for (var j = 0; j < models.length; j++) {\n          var model = models[j];\n\n          // we only deal with otg geometries\n          if (!model.isOTG()) {\n            continue;\n          }\n\n          // Note that we cannot use FragmentLists at this point, because FragmentLists only know about\n          // fragments for which geometry is already loaded.\n          // => We must use Otg package instead.\n          var otg = model.myData;\n          var frags = otg.fragments;\n          var boxes = frags.boxes;\n\n          // If the geomHash is used in this model, get its geom index\n          var geomIndex = otg.geomMetadata.hashToIndex[geomHash];\n          if (!geomIndex) {\n            // geom is not used by this model\n            continue;\n          }\n\n          // If all geometry of a model is loaded, mesh2frag will be deleted by OtgLoader.\n          // But, this implies that this model cannot be waiting for any geometry. So we can just skip it.\n          if (!frags.mesh2frag) {\n            continue;\n          }\n\n          // Get list of fragments in 'model' that are using 'geomIndex'\n          var fragIds = frags.mesh2frag[geomIndex];\n\n          for (var k = 0; k < this.viewers.length; k++) {\n            var viewer = this.viewers[k];\n            if (viewer.impl.modelQueue().getModels().indexOf(model) !== -1) {\n              if (typeof fragIds === 'number') {\n                // single fragId\n                var value = computeFragImportance(fragIds, boxes, frustums[viewer.id]);\n                sumImportances += value;\n\n              } else if (Array.isArray(fragIds)) {\n                // multiple fragIds\n                for (var k = 0; k < fragIds.length; k++) {\n                  var fragId = fragIds[k];\n\n                  var value = computeFragImportance(fragId, boxes, frustums[viewer.id]);\n                  sumImportances += value;\n                }\n              }\n            }\n          }\n        }\n\n        task.importance = sumImportances;\n\n        if (!useFullSort) {\n          //Move the task to the correct spot in the list based on its\n          //new importance. This is basically insertion sort, but assuming\n          //the task list is nearly sorted already it should be quick\n          var j = i;\n          while (j > 0 && sumImportances > this.waitingTasks[j - 1].importance) {\n            this.waitingTasks[j] = this.waitingTasks[j - 1];\n            j--;\n          }\n          this.waitingTasks[j] = task;\n        }\n      }\n\n      if (useFullSort && !timeOut) {\n        // sort task queue by descending request priority\n        this.waitingTasks.sort(compareRequests);\n        this.fullSortDone = true;\n      }\n\n      // return true if all request priorities are up-to-date and sorted\n      return !timeOut;\n    } }, { key: \"makeUrgent\", value: function makeUrgent(\n\n    hashMap) {\n\n      var geomsTodo = 0;\n\n      // Push priority of all hashes that we want\n      for (var hash in hashMap) {\n        if (hashMap[hash] === true) {\n          this.urgentHashes[hash] = true;\n          geomsTodo++;\n        }\n      }\n\n      // avoid hanging if hashMap is empty\n      if (geomsTodo === 0) {\n        return 0;\n      }\n\n      // Sort all related tasks instantly to the front. This would happen automatically,\n      // but a while later due to the gradual importance update.\n      for (var i = 0; i < this.waitingTasks.length; i++) {\n        var task = this.waitingTasks[i];\n        if (this.urgentHashes[task.hash]) {\n          task.importance = Infinity;\n        }\n      }\n      this.waitingTasks.sort(compareRequests);\n\n      return geomsTodo;\n    } }, { key: \"removeUrgent\", value: function removeUrgent(\n\n    hash) {\n      delete this.urgentHashes[hash];\n    } }, { key: \"addTask\", value: function addTask(\n\n    task) {\n      this.waitingTasks.push(task);\n    } }, { key: \"takeTask\", value: function takeTask()\n\n    {\n      return this.waitingTasks.shift();\n    } }, { key: \"isEmpty\", value: function isEmpty()\n\n    {\n      return this.waitingTasks.length === 0;\n    } }]);return OtgPriorityQueue;}();","import { logger } from \"../../../logger/Logger\";\n\n//Implements a generic progressive reader for OTG fixed record size binary streams,\n//including the material and geometry hash lists and the fragment list.\nexport function ProgressiveReadContext(itemCB, defaultByteStride) {\n\n  var currentRow = 0;\n  var stride;\n  var byteStride;\n  var version;\n  var bdata;\n  var fdata;\n  var idata;\n\n  function readHeader(receiveBuffer) {\n    var headerBytes = new Uint8Array(4);\n\n    if (typeof receiveBuffer === \"string\") {\n      for (var i = 0; i < 4; i++) {\n        headerBytes[i] = receiveBuffer.charCodeAt(i);}\n    } else {\n      for (var _i = 0; _i < 4; _i++) {\n        headerBytes[_i] = receiveBuffer[_i];}\n    }\n\n    byteStride = headerBytes[1] << 8 | headerBytes[0];\n\n    if (!byteStride)\n    byteStride = defaultByteStride || 0;\n\n    if (!byteStride)\n    logger.error(\"Unknwon byte stride.\");\n\n    if (byteStride % 4)\n    logger.error(\"Expected byte size to be multiple of 4, but got \" + byteStride);\n\n    version = headerBytes[3] << 8 | headerBytes[2];\n    stride = byteStride / 4;\n\n    bdata = new Uint8Array(byteStride);\n    fdata = new Float32Array(bdata.buffer);\n    idata = new Uint32Array(bdata.buffer);\n\n    if (version > 0) {\n      //currently unused\n      //var flags = idata[offset+3];\n    }\n  }\n\n\n  this.onData = function (receiveBuffer, receivedLength, finalCall) {\n\n    //The node.js native loader uses a manually resized Buffer to accumulate data\n    //and the buffer length is usually bigger than the length of the usable data\n    //inside the buffer. The web browser loader uses a different (browser native) code path\n    //where the buffer size and content are equal and not sent with the callback.\n    if (receivedLength === undefined)\n    receivedLength = receiveBuffer.length;\n\n    var isString = typeof receiveBuffer === \"string\";\n\n    while (true) {\n      //On the first progress event, read the header\n      if (!currentRow && receivedLength >= 4) {\n        readHeader(receiveBuffer);\n        currentRow++;\n      } else if (receivedLength < 4) {\n        return false;\n      }\n\n      var streamOffset = currentRow * byteStride;\n      var endOffset = streamOffset + byteStride;\n\n      if (receivedLength < endOffset)\n      return finalCall;\n\n      if (isString) {\n        for (var j = 0; j < byteStride; j++) {\n          bdata[j] = receiveBuffer.charCodeAt(j + streamOffset) & 0xff;\n        }\n      } else {\n        for (var _j = 0; _j < byteStride; _j++) {\n          bdata[_j] = receiveBuffer[_j + streamOffset];\n        }\n      }\n\n      //The callback will return true if it was able\n      //to process the item at this time. If not, we will\n      //call it later with the same item, until it accepts it.\n      if (itemCB(this, currentRow)) {\n        currentRow++;\n      } else {\n        return false;\n      }\n    }\n  };\n\n  this.onEnd = function (receiveBuffer, receivedLength) {\n    var isDoneProcessing = this.onData(receiveBuffer, receivedLength, true);\n\n    //Remember the response data in case there is a dependency that hasn't loaded yet\n    //and we need to delay processing\n    if (!isDoneProcessing) {\n      this.rawData = receiveBuffer;\n      this.rawLength = receivedLength;\n    }\n  };\n\n  this.flush = function () {\n\n    if (!this.rawData)\n    return;\n\n    var isDoneProcessing = this.onData(this.rawData, this.rawLength, true);\n    if (isDoneProcessing)\n    this.rawData = null;\n  };\n\n  this.idata = function () {return idata;};\n  this.fdata = function () {return fdata;};\n  this.bdata = function () {return bdata;};\n  this.version = function () {return version;};\n  this.byteStride = function () {return byteStride;};\n\n}","export default Object.freeze({\n  // key is the file type. Use only lowercase\n  // value is the viewer extension id. Must be one of the extensions registered in extensions/externalExtensions.js\n  pdf: 'Autodesk.PDF',\n  scalaris: 'Autodesk.Scalaris',\n  dwf: 'Autodesk.DWF',\n  dwfx: 'Autodesk.DWF',\n  rcp: 'Autodesk.ReCap' });","function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;} // Empty2DModelLoader - Loader for an empty 2D scene.\nexport var Empty2DModelLoader = /*#__PURE__*/function () {\n  function Empty2DModelLoader(viewer3DImpl) {_classCallCheck(this, Empty2DModelLoader);\n    this.viewer3DImpl = viewer3DImpl;\n  }_createClass(Empty2DModelLoader, [{ key: \"loadFile\", value: function loadFile(\n\n    url) {var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};var onDone = arguments.length > 2 ? arguments[2] : undefined;var onWorkerStart = arguments.length > 3 ? arguments[3] : undefined;\n      var width = options.width || 100;\n      var height = options.height || 100;\n\n      onWorkerStart && onWorkerStart();\n\n      this.svf = {\n        is2d: true,\n        viewports: [],\n        layersMap: { \"0\": 0 },\n        layerCount: 1,\n        bbox: new THREE.Box3(new THREE.Vector3(0, 0, 0),\n        new THREE.Vector3(width, height, 0)),\n        fragments: {\n          length: 1,\n          fragId2dbId: [0],\n          dbId2fragId: {},\n          transforms: new Float32Array(12),\n          boxes: [0, 0, 0, width, height, 0] },\n\n        loadOptions: {\n          bubbleNode: new Autodesk.Viewing.BubbleNode({\n            urn: 'Dummy_urn',\n            guid: 'Dummy_guid' }) },\n\n\n        metadata: {\n          page_dimensions: {\n            page_width: width,\n            page_height: height,\n            logical_width: width,\n            logical_height: height,\n            logical_offset_x: 0,\n            logical_offset_y: 0,\n            page_units: \"inch\" } },\n\n\n        strings: [],\n        stringDbIds: [],\n        loadDone: true };\n\n\n      var model = new Autodesk.Viewing.Model(this.svf);\n\n      model.initialize();\n      model.loader = this;\n      this.model = model;\n      onDone(null, model);\n      this.viewer3DImpl.api.dispatchEvent({ type: Autodesk.Viewing.MODEL_ROOT_LOADED_EVENT, svf: this.svf, model: model });\n      this.viewer3DImpl.onLoadComplete(model);\n    } }, { key: \"dtor\", value: function dtor()\n\n    {} }, { key: \"is2d\", value: function is2d()\n    {return true;} }, { key: \"is3d\", value: function is3d()\n    {return false;} }]);return Empty2DModelLoader;}();","\nimport { logger } from \"../../logger/Logger\";\nimport { BufferGeometryUtils } from \"../../wgs/scene/BufferGeometry\";\nimport { errorCodeString, ErrorCodes } from \"../net/ErrorCodes\";\nimport { ProgressState } from \"../../application/ProgressState\";\nimport { FileLoaderManager } from \"../../application/FileLoaderManager\";\nimport { pathToURL } from '../net/Xhr';\nimport { initWorkerScript, createWorker } from \"./WorkerCreator\";\nimport { PropDbLoader } from \"./PropDbLoader\";\nimport { isMobileDevice } from \"../../compat\";\nimport * as et from \"../../application/EventTypes\";\nimport { TextureLoader } from \"./TextureLoader\";\nimport { endpoint } from \"../net/endpoints\";\nimport { Model } from \"../../application/Model\";\nimport * as THREE from \"three\";\n\n\nvar WORKER_PARSE_F2D = \"PARSE_F2D\";\nvar WORKER_STREAM_F2D = \"STREAM_F2D\";\nvar WORKER_PARSE_F2D_FRAME = \"PARSE_F2D_FRAME\";\nvar avp = Autodesk.Viewing.Private;\n\nexport var OUTPUT_TYPE = {\n  GEOMETRY: \"geometry\",\n  VERTEX_BUFFER: \"vertexBuffer\" };\n\n\n/** @constructor */\nexport function F2DLoader(parent) {\n  this.viewer3DImpl = parent;\n  this.loading = false;\n  this.tmpMatrix = new THREE.Matrix4();\n\n  this.logger = logger;\n  this.loadTime = 0;\n}\n\nF2DLoader.prototype.dtor = function () {\n  // Cancel all potential process on loading a file.\n\n  // 1. init worker script can be cancelled. \n  // \n  if (this.initWorkerScriptToken) {\n    this.initWorkerScriptToken.cancel();\n    this.initWorkerScriptToken = null;\n    logger.debug(\"F2D loader dtor: on init worker script.\");\n  }\n\n  // 2. Streaming F2D data can be cancelled. \n  if (this.streamingWorker) {\n    this.streamingWorker.terminate();\n    this.streamingWorker = null;\n    logger.debug(\"F2D loader dtor: on streaming worker.\");\n  }\n\n  // 3. Parsing F2D geometry can be cancelled.\n  if (this.parsingWorker) {\n    this.parsingWorker.terminate();\n    this.parsingWorker = null;\n    logger.debug(\"F2D loader dtor: on parsing worker.\");\n  }\n\n  // 4. Property loading can be cancelled.\n  if (this.svf && this.svf.propDbLoader) {\n    this.svf.propDbLoader.dtor();\n    this.svf.propDbLoader = null;\n  }\n\n  // And clear metadata.\n  this.viewer3DImpl = null;\n  this.loading = false;\n  this.tmpMatrix = null;\n  this.logger = null;\n  this.loadTime = 0;\n\n  this.svf = null;\n  this.model = null;\n  this.options = null;\n};\n\nF2DLoader.prototype.isValid = function () {\n  return !!this.viewer3DImpl;\n};\n\nF2DLoader.prototype.loadFile = function (path, options, onDone, onWorkerStart) {\n  if (!this.viewer3DImpl) {\n    logger.log(\"F2D loader was already destructed. So no longer usable.\");\n    return false;\n  }\n\n  if (this.loading) {\n    logger.log(\"Loading of F2D already in progress. Ignoring new request.\");\n    return false;\n  }\n\n  // Mark it as loading now.\n  this.loading = true;\n\n  var index = path.indexOf('urn:');\n  if (index != -1) {\n    // Extract urn:adsk.viewing:foo.bar.whateverjunks out of the path URL and bind it to logger.\n    // From now on, we can send logs to viewing service, and logs are grouped by urn to make Splunk work.\n    path = decodeURIComponent(path);\n    var urn = path.substr(index, path.substr(index).indexOf('/'));\n    logger.log(\"Extracted URN: \" + urn);\n\n    // Extract urn(just base64 code)\n    var _index = urn.lastIndexOf(':');\n    this.svfUrn = urn.substr(_index + 1);\n  } else {\n    this.svfUrn = path;\n  }\n\n  this.sharedDbPath = options.sharedPropertyDbPath;\n  this.currentLoadPath = path;\n  this.acmSessionId = options.acmSessionId;\n\n  this.queryParams = \"\";\n  if (this.acmSessionId) {\n    this.queryParams = \"acmsession=\" + this.acmSessionId;\n  }\n\n  this.options = options;\n\n  if (this.options.placementTransform) {\n    //NOTE: The scale of the placement transform is not always sufficient to\n    //determine the correct scale for line widths. This is because when a 2D model (in inches) is\n    //loaded into a 3d scene in feet, the transform includes all the scaling needed to get into feet\n    //but the model space line weight for the drawing is relative to the drawing itself, so an extra\n    //factor of 12 would be needed in such case to cancel out the 1/12 needed for inch->foot.\n    //This could probably be automatically derived, but in an error prone way, so I'm leaving it\n    //up to the application layer that does the model aggregation to pass in the right model scale as an option.\n    this.modelScale = this.options.modelScale || this.options.placementTransform.getMaxScaleOnAxis();\n  } else {\n    this.modelScale = this.options.modelScale || 1;\n  }\n\n  this.isf2d = true;\n  var scope = this;\n\n  this.initWorkerScriptToken = initWorkerScript(function () {\n    scope.loadFydoCB(path, options, onDone, onWorkerStart);\n  });\n\n  return true;\n};\n\n\nF2DLoader.prototype.loadFydoCB = function (path, options, onDone, onWorkerStart) {\n  this.t0 = Date.now();\n\n  var svfPath = pathToURL(path);\n\n  // Streaming worker as data producer that generates fydo frame streams.\n  this.streamingWorker = createWorker(true);\n  // Parsing worker as data consumer that consumes fydo frame streams and generate meshes.\n  this.parsingWorker = createWorker();\n  var scope = this;\n  var first = true;\n\n  var renderer = this.viewer3DImpl.glrenderer();\n\n  var supportsInstancing;\n  var isWebGL2;\n\n  // NodeJS doesn't have renderer.\n  if (renderer) {\n    supportsInstancing = renderer.supportsInstancedArrays();\n    isWebGL2 = renderer.isWebGL2();\n  }\n\n  var terminateParser = function terminateParser() {\n    scope.parsingWorker.terminate();\n    scope.parsingWorker = null;\n  };\n\n  var onStream = function onStream(ew) {\n\n    if (!scope.isValid()) {\n      return;\n    }\n\n    if (first && onWorkerStart) {\n      first = false;\n      onWorkerStart();\n    }\n\n    var msg;\n    if (ew.data && ew.data.type == \"F2DBLOB\") {\n      msg = { operation: WORKER_PARSE_F2D,\n        data: ew.data.buffer,\n        metadata: ew.data.metadata,\n        manifest: ew.data.manifest,\n        basePath: ew.data.basePath,\n        f2dLoadOptions: {\n          modelSpace: options.modelSpace,\n          bgColor: options.bgColor,\n          noShadow: options.noShadow,\n          isMobile: isMobileDevice(),\n          supportsInstancing: supportsInstancing,\n          isWebGL2: isWebGL2,\n          excludeTextGeometry: options.excludeTextGeometry,\n          outputType: options.outputType || OUTPUT_TYPE.VERTEX_BUFFER // default vbb\n        },\n        url: svfPath };\n\n      scope.parsingWorker.doOperation(msg, [msg.data]);\n      scope.streamingWorker.terminate();\n      scope.streamingWorker = null;\n\n    } else if (ew.data && ew.data.type == \"F2DSTREAM\") {\n      msg = { operation: WORKER_PARSE_F2D_FRAME,\n        data: ew.data.frames,\n        url: svfPath,\n        f2dLoadOptions: {\n          modelSpace: options.modelSpace,\n          bgColor: options.bgColor,\n          noShadow: options.noShadow,\n          isMobile: isMobileDevice(),\n          supportsInstancing: supportsInstancing,\n          isWebGL2: isWebGL2,\n          excludeTextGeometry: options.excludeTextGeometry,\n          outputType: options.outputType || OUTPUT_TYPE.VERTEX_BUFFER } };\n\n\n\n      //first frame\n      if (ew.data.metadata) {\n        msg.metadata = ew.data.metadata;\n        msg.manifest = ew.data.manifest;\n      }\n\n      //last frame?\n      if (ew.data.finalFrame) {\n        msg.finalFrame = true;\n        scope.streamingWorker.terminate();\n        scope.streamingWorker = null;\n        scope.fileMemorySize /= 2; // Only one copy of the file now\n      }\n\n      if (ew.data.progress)\n      scope.viewer3DImpl.signalProgress(100 * ew.data.progress, ProgressState.LOADING);\n\n      scope.parsingWorker.doOperation(msg, msg.data ? [msg.data] : undefined);\n\n    } else if (ew.data && ew.data.type == \"F2DAssetURL\") {\n      //TODO: remove this message from the worker\n    } else if (ew.data && ew.data.assetRequest) {\n      //TODO: remove this message from the worker\n    } else if (ew.data && ew.data.progress) {\n      //just ignore progress-only message, it's only needed by the initial worker start notification above\n    } else if (ew.data && ew.data.debug) {\n      logger.debug(ew.data.message);\n    } else if (ew.data && ew.data.error) {\n      scope.loading = false;\n      scope.streamingWorker.terminate();\n      scope.streamingWorker = null;\n      if (onDone)\n      onDone(ew.data.error);\n    } else {\n      logger.error(\"F2D download failed.\", errorCodeString(ErrorCodes.NETWORK_FAILURE));\n      scope.loading = false;\n      scope.streamingWorker.terminate();\n      scope.streamingWorker = null;\n    }\n  };\n\n\n  var onParseGeometry = function onParseGeometry(ew) {\n    if (!scope.isValid()) {\n      return;\n    }\n\n    if (first && onWorkerStart) {\n      first = false;\n      onWorkerStart();\n    }\n\n    if (ew.data && ew.data.f2d) {\n      scope.svf = ew.data.f2d;\n      var geometry = ew.data.f2d.geometry;\n      terminateParser();\n\n      logger.info(\"Num polylines: \" + geometry.numPolylines);\n      logger.info(\"Line segments: \" + geometry.numLineSegs);\n      logger.info(\"Circular arcs: \" + geometry.numCircles);\n      logger.info(\"Ellipitcal arcs:\" + geometry.numEllipses);\n\n      scope.onModelRootLoadDone(scope.svf);\n\n      if (onDone) onDone(null, scope.model);\n      scope.viewer3DImpl.api.dispatchEvent({\n        type: et.MODEL_ROOT_LOADED_EVENT,\n        svf: scope.svf,\n        model: scope.model });\n\n\n      scope.onGeomLoadDone();\n    }\n  };\n\n  var onParse = function onParse(ew) {\n\n    if (!scope.isValid()) {\n      return;\n    }\n\n    if (first && onWorkerStart) {\n      first = false;\n      onWorkerStart();\n    }\n\n    var f, i;\n    if (ew.data && ew.data.f2d) {\n      f = scope.svf = ew.data.f2d;\n\n      terminateParser();\n\n      logger.info(\"Num polylines: \" + f.numPolylines);\n      logger.info(\"Line segments: \" + f.numLineSegs);\n      logger.info(\"Circular arcs: \" + f.numCircles);\n      logger.info(\"Ellipitcal arcs:\" + f.numEllipses);\n      logger.info(\"Plain triangles:\" + f.numTriangles);\n      logger.info(\"Total # of op codes generated by fydo.parse: \" + f.opCount);\n\n      scope.onModelRootLoadDone(scope.svf);\n\n      if (onDone)\n      onDone(null, scope.model);\n\n      scope.viewer3DImpl.api.dispatchEvent({ type: et.MODEL_ROOT_LOADED_EVENT, svf: scope.svf, model: scope.model });\n\n\n      for (i = 0; i < f.meshes.length; i++) {\n        scope.processReceivedMesh2D(f.meshes[i], i);\n      }\n\n      f.meshes = null;\n\n      scope.onGeomLoadDone();\n\n      scope.loading = false;\n\n    } else if (ew.data && ew.data.f2dframe) {\n      var baseIndex = 0;\n\n      if (!ew.data.meshes) {\n        //First message from the worker\n        scope.svf = ew.data.f2dframe;\n        baseIndex = ew.data.baseIndex;\n      } else {\n        //Update the world box and current mesh index\n        //on subsequent messages from the worker.\n        var bbox = ew.data.bbox;\n        scope.svf.bbox = new THREE.Box3().copy(bbox);\n        scope.svf.modelSpaceBBox = scope.svf.bbox.clone();\n\n        if (scope.svf.placementTransform) {\n          scope.svf.bbox.applyMatrix4(scope.svf.placementTransform);\n        }\n\n        baseIndex = ew.data.baseIndex;\n      }\n\n      f = scope.svf;\n\n      if (!f.fragments || !f.fragments.initialized) {\n        //First message from the worker,\n        //initialize the load states, fragment lists, etc.\n        scope.onModelRootLoadDone(f);\n\n        if (onDone) {\n          onDone(null, scope.model);\n        }\n        scope.viewer3DImpl.api.dispatchEvent({ type: et.MODEL_ROOT_LOADED_EVENT, svf: f, model: scope.model });\n\n      }\n\n      if (ew.data.meshes && ew.data.meshes.length)\n      {\n        for (i = 0; i < ew.data.meshes.length; i++) {\n          scope.processReceivedMesh2D(ew.data.meshes[i], baseIndex + i);\n        }\n      }\n\n      if (ew.data.finalFrame) {\n        //Update the F2D properties which are accumulated\n        //while reading the F2D stream.\n        var cumulativeProps = ew.data.cumulativeProps;\n        for (var p in cumulativeProps) {\n          f[p] = cumulativeProps[p];\n        }\n\n        terminateParser();\n\n        scope.onGeomLoadDone();\n\n        scope.loading = false;\n      }\n\n    } else if (ew.data && ew.data.progress) {\n      //just ignore progress-only message, it's only needed by the initial worker start notification above\n    } else if (ew.data && ew.data.debug) {\n      logger.debug(ew.data.message);\n    } else if (ew.data && ew.data.error) {\n      scope.loading = false;\n      terminateParser();\n\n      logger.error(\"Error while processing F2d: \" + JSON.stringify(ew.data.error.args));\n\n      if (onDone)\n      onDone(ew.data.error);\n    } else {\n      logger.error(\"F2D download failed.\", errorCodeString(ErrorCodes.NETWORK_FAILURE));\n      //Download failed.\n      scope.loading = false;\n      terminateParser();\n    }\n  };\n\n  this.streamingWorker.addEventListener('message', onStream, false);\n\n  var onParseCallback = options.outputType === OUTPUT_TYPE.GEOMETRY ? onParseGeometry : onParse;\n  this.parsingWorker.addEventListener(\"message\", onParseCallback, false);\n\n  var msg = { operation: WORKER_STREAM_F2D,\n    url: svfPath,\n    objectIds: options.ids,\n    queryParams: this.queryParams }; // For CORS caching issue.\n\n  this.streamingWorker.doOperation(endpoint.initLoadContext(msg));\n\n  return true;\n};\n\nF2DLoader.prototype.processReceivedMesh = function (mdata) {\n\n  //Find all fragments that instance this mesh\n  var meshid = mdata.packId + \":\" + mdata.meshIndex;\n\n  var svf = this.svf;\n  var fragments = svf.fragments;\n\n  var fragIndexes = fragments.mesh2frag[meshid];\n  if (fragIndexes === undefined) {\n    logger.warn(\"Mesh \" + meshid + \" was not referenced by any fragments.\");\n    return;\n  }\n  if (!Array.isArray(fragIndexes))\n  fragIndexes = [fragIndexes];\n\n  var mesh = mdata.mesh;\n\n  //Convert the received mesh to THREE buffer geometry\n  BufferGeometryUtils.meshToGeometry(mdata);\n\n  mdata.geometry.unpackXform = mesh.unpackXform;\n\n  if (mesh.texData) {\n    var tIdColor = new THREE.DataTexture(new Uint8Array(mesh.texData.buffer), mesh.texData.length, 1,\n    THREE.RGBAFormat, THREE.UnsignedByteType, THREE.UVMapping,\n    THREE.ClampToEdgeWrapping, THREE.ClampToEdgeWrapping, THREE.NearestFilter, THREE.NearestFilter, 0);\n    tIdColor.generateMipmaps = false;\n    tIdColor.flipY = false;\n    tIdColor.needsUpdate = true;\n\n    mdata.geometry.tIdColor = tIdColor;\n    mdata.geometry.vIdColorTexSize = new THREE.Vector2(mesh.texData.length, 1);\n  }\n\n\n  var numInstances = fragIndexes.length;\n\n  var rm = this.model;\n\n  //Reuse previous index of this geometry, if available\n  rm.getGeometryList().addGeometry(mdata.geometry, numInstances, mdata.meshIndex + 1);\n\n  var ib = mdata.geometry.attributes['index'].array || mdata.geometry.ib;\n  var polyCount = ib.length / 3;\n\n  //For each fragment, add a mesh instance to the renderer\n  for (var i = 0; i < fragIndexes.length; i++) {\n    var fragId = 0 | fragIndexes[i];\n\n    //We get the matrix from the fragments and we set it back there\n    //with the activateFragment call, but this is to maintain the\n    //ability to add a plain THREE.Mesh -- otherwise it could be simpler\n    rm.getFragmentList().getOriginalWorldMatrix(fragId, this.tmpMatrix);\n\n    if (this.options.placementTransform) {\n      this.tmpMatrix = new THREE.Matrix4().multiplyMatrices(this.options.placementTransform, this.tmpMatrix);\n    }\n\n    var materialId = fragments.materials[fragId].toString();\n\n    if (fragments.polygonCounts)\n    fragments.polygonCounts[fragId] = polyCount;\n\n    var m = this.viewer3DImpl.setupMesh(this.model, mdata.geometry, materialId, this.tmpMatrix);\n    rm.activateFragment(fragId, m);\n  }\n\n  //don't need this mapping anymore.\n  fragments.mesh2frag[meshid] = null;\n\n  //Repaint and progress reporting\n  fragments.numLoaded += fragIndexes.length;\n\n  var numLoaded = fragments.numLoaded;\n\n  //repaint every once in a while -- more initially, less as the load drags on.\n  if (svf.geomPolyCount > svf.nextRepaintPolys) {\n    //logger.log(\"num loaded \" + numLoaded);\n    svf.numRepaints++;\n    svf.nextRepaintPolys += 10000 * Math.pow(1.5, svf.numRepaints);\n    this.viewer3DImpl.invalidate(false, true);\n  }\n\n  if (numLoaded % 20 == 0) {\n    this.viewer3DImpl.invalidate(false, true);\n  }\n};\n\nF2DLoader.prototype.processReceivedMesh2D = function (mesh, mindex) {\n\n  // Keep track of the buffer count\n  if (mindex >= this.bufferCount)\n  this.bufferCount = mindex + 1;\n\n  var mdata = { mesh: mesh, is2d: true, packId: \"0\", meshIndex: mindex };\n\n  var meshId = \"0:\" + mindex;\n\n  var frags = this.svf.fragments;\n\n  // Only process the dbids the first time we process the fragment\n  if (!frags.fragId2dbId[mindex]) {\n    //Remember the list of all dbIds referenced by this mesh.\n    //In the 2D case this is 1->many (1 frag = many dbIds) mapping instead of\n    // 1 dbId -> many fragments like in the SVF 3D case.\n    var dbIds = Object.keys(mdata.mesh.dbIds).map(function (item) {return parseInt(item);});\n    frags.fragId2dbId[mindex] = dbIds;\n\n    //TODO: dbId2fragId is not really necessary if we have a good instance tree for the 2D drawing (e.g. Revit, AutoCAD)\n    //so we can get rid of this mapping if we can convert Viewer3DImpl.highlightFragment to use the same logic for 2D as for 3D.\n    for (var j = 0; j < dbIds.length; j++) {\n      var dbId = dbIds[j];\n      var fragIds = frags.dbId2fragId[dbId];\n      if (Array.isArray(fragIds))\n      fragIds.push(mindex);else\n      if (typeof fragIds !== \"undefined\") {\n        frags.dbId2fragId[dbId] = [fragIds, mindex];\n      } else\n      {\n        frags.dbId2fragId[dbId] = mindex;\n      }\n    }\n\n    mesh.material.modelScale = this.modelScale;\n    mesh.material.opacity = this.options.opacity;\n    mesh.material.doNotCut = this.options.doNotCut;\n    var viewer = this.viewer3DImpl;\n    frags.materials[mindex] = this.viewer3DImpl.matman().create2DMaterial(this.model, mesh.material, false, false, function (texture, model) {\n\n      //Unfortunately we have to check for texture load complete here also, not just\n      //in the final call to loadTextures. This is because geometry load can complete\n      //before or after texture load completes.\n      var svf = model.getData();\n      if (!TextureLoader.requestsInProgress() && svf.loadDone && !svf.texLoadDone) {\n        svf.texLoadDone = true;\n        viewer.onTextureLoadComplete(model);\n      }\n\n      // Weak mobile devices can't handle invalidate call for each texture that's being loaded.\n      // We postpone the texture rendering on this case to the last texture to be loaded.\n      if (!(isMobileDevice() && TextureLoader.requestsInProgress())) {\n        viewer.invalidate(false, true, false);\n      }\n    });\n\n    frags.length++;\n  }\n  frags.mesh2frag[meshId] = mindex;\n\n  this.processReceivedMesh(mdata);\n\n};\n\nF2DLoader.prototype.onModelRootLoadDone = function (svf) {var _this$options$placeme, _this$options$placeme2;\n\n  //In the 2d case we create and build up the fragments mapping\n  //on the receiving end.\n  svf.fragments = {};\n  svf.fragments.mesh2frag = {};\n  svf.fragments.materials = [];\n  svf.fragments.fragId2dbId = [];\n  svf.fragments.dbId2fragId = {};\n  svf.fragments.length = 0;\n  svf.fragments.initialized = true;\n\n\n  svf.geomMemory = 0;\n  svf.fragments.numLoaded = 0;\n  svf.gpuNumMeshes = 0;\n  svf.gpuMeshMemory = 0;\n\n  svf.nextRepaintPolys = 10000;\n  svf.numRepaints = 0;\n\n  svf.urn = this.svfUrn;\n  svf.acmSessionId = this.acmSessionId;\n\n  svf.basePath = \"\";\n  var lastSlash = this.currentLoadPath.lastIndexOf(\"/\");\n  if (lastSlash !== -1)\n  svf.basePath = this.currentLoadPath.substr(0, lastSlash + 1);\n\n  svf.placementTransform = (_this$options$placeme = this.options.placementTransform) === null || _this$options$placeme === void 0 ? void 0 : _this$options$placeme.clone();\n  svf.placementWithOffset = (_this$options$placeme2 = this.options.placementTransform) === null || _this$options$placeme2 === void 0 ? void 0 : _this$options$placeme2.clone();\n  svf.loadOptions = this.options;\n\n  var t1 = Date.now();\n  this.loadTime += t1 - this.t0;\n  logger.log(\"SVF load: \" + (t1 - this.t0));\n\n  this.t0 = t1;\n\n  //The BBox object loses knowledge of its\n  //type when going across the worker thread boundary...\n  svf.bbox = new THREE.Box3().copy(svf.bbox);\n  svf.modelSpaceBBox = svf.bbox.clone();\n\n  if (svf.placementTransform) {\n    svf.bbox.applyMatrix4(svf.placementTransform);\n  }\n\n  //Create the API Model object and its render proxy\n  var model = this.model = new Model(svf);\n  model.loader = this;\n\n  model.initialize();\n\n  if (!this.options.skipPropertyDb) {\n    this.svf.propDbLoader = new PropDbLoader(this.sharedDbPath, this.model, this.viewer3DImpl.api);\n  }\n\n  logger.log(\"scene bounds: \" + JSON.stringify(svf.bbox));\n\n  var metadataStats = {\n    category: \"metadata_load_stats\",\n    urn: svf.urn,\n    layers: svf.layerCount };\n\n  logger.track(metadataStats);\n\n  model.setDoNotCut(this.viewer3DImpl.matman(), !!this.options.doNotCut);\n\n  this.viewer3DImpl.signalProgress(5, ProgressState.ROOT_LOADED, this.model);\n  this.viewer3DImpl.invalidate(false, false);\n};\n\n\nF2DLoader.prototype.onGeomLoadDone = function () {\n  this.svf.loadDone = true;\n\n  // Don't need these anymore\n  this.svf.fragments.entityIndexes = null;\n  this.svf.fragments.mesh2frag = null;\n\n  var t1 = Date.now();\n  var msg = \"Fragments load time: \" + (t1 - this.t0);\n  this.loadTime += t1 - this.t0;\n\n  //Note that materials/texutres for F2D are done already as their geometry\n  //is received, so this logic will most likely just trigger the textureLoadComplete event.\n  TextureLoader.loadModelTextures(this.model, this.viewer3DImpl);\n\n  //Load the property database after all geometry is loaded (2D case). For 2D,\n  //the fragId->dbId mapping is only fully known once geometry is loaded, as\n  //it's built on the fly.\n  //TODO: As an optimization we can split the property db logic into two calls -- one to load the files\n  //in parallel with the geometry and a second to do the processing.\n  if (!this.options.skipPropertyDb)\n  this.loadPropertyDb();\n\n  logger.log(msg);\n\n  var modelStats = {\n    category: \"model_load_stats\",\n    is_f2d: true,\n    has_prism: this.viewer3DImpl.matman().hasPrism,\n    load_time: this.loadTime,\n    geometry_size: this.model.getGeometryList().geomMemory,\n    meshes_count: this.model.getGeometryList().geoms.length,\n    urn: this.svfUrn };\n\n  logger.track(modelStats, true);\n\n  var geomList = this.model.getGeometryList();\n  var dataToTrack = {\n    load_time: this.loadTime,\n    polygons: geomList.geomPolyCount,\n    fragments: this.model.getFragmentList().getCount(),\n    mem_usage: geomList.gpuMeshMemory };\n\n  avp.analytics.track('viewer.model.loaded', dataToTrack);\n\n  this.currentLoadPath = null;\n  this.isf2d = undefined;\n\n  this.viewer3DImpl.onLoadComplete(this.model);\n};\n\n\nF2DLoader.prototype.loadPropertyDb = function () {\n  if (this.svf.propDbLoader)\n  this.svf.propDbLoader.load();\n};\n\nF2DLoader.prototype.is3d = function () {\n  return false;\n};\n\nFileLoaderManager.registerFileLoader(\"f2d\", [\"f2d\"], F2DLoader);","\n\"use strict\";\n\nimport { ProgressState } from \"../../application/ProgressState\";\nimport { errorCodeString, ErrorCodes } from \"../net/ErrorCodes\";\nimport { logger } from \"../../logger/Logger\";\nimport { ViewingService } from \"../net/Xhr\";\nimport { ModelIteratorTexQuad } from \"../../wgs/scene/leaflet/ModelIteratorTexQuad\";\nimport { TexQuadConfig } from \"../../wgs/scene/leaflet/ModelIteratorTexQuad\";\nimport { TextureLoader } from \"./TextureLoader\";\nimport { FileLoaderManager } from \"../../application/FileLoaderManager\";\nimport { Model } from \"../../application/Model\";\nimport { initLoadContext } from \"../net/endpoints\";\nimport { isOffline } from \"../net/endpoints\";\nimport * as et from \"../../application/EventTypes\";\nimport * as THREE from \"three\";\n\nvar avp = Autodesk.Viewing.Private;\n\n/** Loader for leaflet image pyramids and simple image files.\n                                     *   @param {Viewer3DImpl} parent\n                                     */\nexport function LeafletLoader(parent) {\n\n  var _parent = parent;\n  this.isLeafletLoader = true; // For QA only\n  this.loading = false;\n\n  // Parses a single file header of a zip file.\n  //\n  // @param {Array}         input                  input as bytes array of the entire zip file.\n  // @param {Offset}        [options]              offset of the relevant file header.\n  var parseFileHeader = function parseFileHeader(input, offset) {\n\n    var fileHeaderSignature = [0x50, 0x4b, 0x01, 0x02];\n    var ip = offset;\n\n    if (input[ip++] !== fileHeaderSignature[0] || input[ip++] !== fileHeaderSignature[1] || input[ip++] !== fileHeaderSignature[2] || input[ip++] !== fileHeaderSignature[3]) {\n      logger.error('invalid file header signature');\n      return null;\n    }\n\n    var fileHeader = {};\n\n    // version made by\n    fileHeader.version = input[ip++];\n\n    // os version\n    fileHeader.os = input[ip++];\n\n    // version needed to extract\n    fileHeader.needVersion = input[ip++] | input[ip++] << 8;\n\n    // general purpose bit flag\n    fileHeader.flags = input[ip++] | input[ip++] << 8;\n\n    // compression method\n    fileHeader.compression = input[ip++] | input[ip++] << 8;\n\n    // last mod file time\n    fileHeader.time = input[ip++] | input[ip++] << 8;\n\n    //last mod file date\n    fileHeader.date = input[ip++] | input[ip++] << 8;\n\n    // crc-32\n    fileHeader.crc32 = (input[ip++] | input[ip++] << 8 | input[ip++] << 16 | input[ip++] << 24) >>> 0;\n\n    // compressed size\n    fileHeader.compressedSize = (input[ip++] | input[ip++] << 8 | input[ip++] << 16 | input[ip++] << 24) >>> 0;\n\n    // uncompressed size\n    fileHeader.plainSize = (input[ip++] | input[ip++] << 8 | input[ip++] << 16 | input[ip++] << 24) >>> 0;\n\n    // file name length\n    fileHeader.fileNameLength = input[ip++] | input[ip++] << 8;\n\n    // extra field length\n    fileHeader.extraFieldLength = input[ip++] | input[ip++] << 8;\n\n    // file comment length\n    fileHeader.fileCommentLength = input[ip++] | input[ip++] << 8;\n\n    // disk number start\n    fileHeader.diskNumberStart = input[ip++] | input[ip++] << 8;\n\n    // internal file attributes\n    fileHeader.internalFileAttributes = input[ip++] | input[ip++] << 8;\n\n    // external file attributes\n    fileHeader.externalFileAttributes = input[ip++] | input[ip++] << 8 | input[ip++] << 16 | input[ip++] << 24;\n\n    // relative offset of local header\n    fileHeader.relativeOffset = (input[ip++] | input[ip++] << 8 | input[ip++] << 16 | input[ip++] << 24) >>> 0;\n\n    // file name\n    fileHeader.filename = String.fromCharCode.apply(null, input.slice(ip, ip += fileHeader.fileNameLength));\n\n    // extra field\n    fileHeader.extraField = input.slice(ip, ip += fileHeader.extraFieldLength);\n\n    // file comment\n    fileHeader.comment = input.slice(ip, ip + fileHeader.fileCommentLength);\n\n    // length of the entry\n    fileHeader.length = ip - offset;\n\n    return fileHeader;\n  };\n\n  // Parses a single local file header of a zip file.\n  //\n  // @param {Array}         input                  input as bytes array of the local file header.\n  var parseLocalFileHeader = function parseLocalFileHeader(input) {\n\n    var localFileHeaderSignature = [0x50, 0x4b, 0x03, 0x04];\n    var ip = 0;\n\n    // local file header signature\n    if (input[ip++] !== localFileHeaderSignature[0] || input[ip++] !== localFileHeaderSignature[1] || input[ip++] !== localFileHeaderSignature[2] || input[ip++] !== localFileHeaderSignature[3]) {\n      logger.error('invalid local file header signature');\n      return null;\n    }\n\n    var localFileHeader = {};\n\n    // version needed to extract\n    localFileHeader.needVersion = input[ip++] | input[ip++] << 8;\n\n    // general purpose bit flag\n    localFileHeader.flags = input[ip++] | input[ip++] << 8;\n\n    // compression method\n    localFileHeader.compression = input[ip++] | input[ip++] << 8;\n\n    // last mod file time\n    localFileHeader.time = input[ip++] | input[ip++] << 8;\n\n    //last mod file date\n    localFileHeader.date = input[ip++] | input[ip++] << 8;\n\n    // crc-32\n    localFileHeader.crc32 = (input[ip++] | input[ip++] << 8 | input[ip++] << 16 | input[ip++] << 24) >>> 0;\n\n    // compressed size\n    localFileHeader.compressedSize = (input[ip++] | input[ip++] << 8 | input[ip++] << 16 | input[ip++] << 24) >>> 0;\n\n    // uncompressed size\n    localFileHeader.plainSize = (input[ip++] | input[ip++] << 8 | input[ip++] << 16 | input[ip++] << 24) >>> 0;\n\n    // file name length\n    localFileHeader.fileNameLength = input[ip++] | input[ip++] << 8;\n\n    // extra field length\n    localFileHeader.extraFieldLength = input[ip++] | input[ip++] << 8;\n\n    // file name\n    localFileHeader.filename = String.fromCharCode.apply(null, input.slice(ip, ip += localFileHeader.fileNameLength));\n\n    // extra field\n    localFileHeader.extraField = input.slice(ip, ip += localFileHeader.extraFieldLength);\n\n    localFileHeader.length = ip;\n\n    return localFileHeader;\n  };\n\n  // Extracts the data from the local file header, given as a bytes array.\n  //\n  // @param {Array}         data                  input as bytes array of the local file header.\n  var extractImage = function extractImage(data) {\n\n    var localFileHeader = parseLocalFileHeader(data);\n    var imageOffset = localFileHeader.length;\n    var imageLength = localFileHeader.compressedSize;\n    var image = data.slice(imageOffset, imageOffset + imageLength);\n\n    return image;\n  };\n\n  // Parses a zip's central directory, and returns a file table contains all the file headers.\n  var parseCentralDirectory = function parseCentralDirectory(input, centralDirOffset, centralDirEntriesNumber) {\n\n    var ip = 0;\n    var fileTable = {};\n    var fileHeader,previousFileHeader = null;\n\n    for (var i = 0; i < centralDirEntriesNumber; ++i) {\n      fileHeader = parseFileHeader(input, ip);\n\n      if (!fileHeader) {\n        return null;\n      }\n\n      if (previousFileHeader) {\n        previousFileHeader.contentSize = fileHeader.relativeOffset - previousFileHeader.relativeOffset;\n      }\n\n      ip += fileHeader.length;\n      fileTable[fileHeader.filename] = fileHeader;\n\n      previousFileHeader = fileHeader;\n    }\n\n    previousFileHeader.contentSize = centralDirOffset - previousFileHeader.relativeOffset;\n\n    return fileTable;\n  };\n\n  var getCentralDirectory = function getCentralDirectory(urn, acmSessionId, offset, length, onSuccess, onError) {\n\n    var queryParams = null;\n    var options = {};\n\n    // If the zip file is offline, get entire zip.\n    // Else, the zip is online, so get only the central dir from the zip, using ranged request, supported by backend.\n    if (!isOffline()) {\n\n      if (acmSessionId) {\n        queryParams = \"acmsession=\" + acmSessionId;\n      }\n\n      options.range = {\n        min: offset,\n        max: length + offset };\n\n    }\n\n    var loadContext = initLoadContext({ queryParams: queryParams });\n\n    ViewingService.getItem(loadContext, urn, onSuccess, onError, options);\n  };\n\n  this.continueLoadFile = function (path, options, onDone, onWorkerStart, config, textureLoader) {\n\n    var self = this;\n\n    var pattern;\n    if (options.loadOptions && options.loadOptions.loadFromZip) {\n      var ext = options.loadOptions.mime.split('/')[1];\n      pattern = '{z}/{x}_{y}.' + ext;\n    } else {\n      pattern = path;\n    }\n\n    config.initFromLoadOptions(pattern, options.loadOptions, textureLoader);\n\n    var iter = null;\n\n    //The Leaflet loader has no long running worker thread initialization,\n    //so we can call back the viewer to continue its renderer initialization.\n    if (onWorkerStart)\n    onWorkerStart();\n\n    //The code below requires the renderer (and the materials manager in particular)\n    //to exist, which happens when we call back onWorkerStart above.\n    function onLoad() {\n      // Create ModelData. Will be returned when calling model.getData() on the data model\n      function LeafletModelData(loadOptions) {\n        // used by Viewer3DImpl for initial camera adjustment     \n        this.bbox = new THREE.Box3();\n\n        this.basePath = path;\n\n        // run viewer in 2D mode\n        this.is2d = true;\n\n        // get paper extent. If not specified in the load options, use the texture resolution so that\n        // measurement works in pixels\n        var paperWidth = loadOptions && loadOptions.paperWidth >= 0.0 ? loadOptions.paperWidth : config.texWidth;\n        var paperHeight = loadOptions && loadOptions.paperHeight >= 0.0 ? loadOptions.paperHeight : config.texHeight;\n\n        // transform for measurement tools\n        this.pageToModelTransform = config.getPageToModelTransform(paperWidth, paperHeight);\n\n        // make page dimensions available to viewer and tools. We store this in an own object metadata.page_dimensions.\n        // This is done for consistency with F2D, so that functions like Model.getMetaData() and Model.getDisplayUnits() can use it.\n        this.metadata = {};\n        this.metadata.page_dimensions = {};\n        var pd = this.metadata.page_dimensions;\n        pd.page_width = paperWidth;\n        pd.page_height = paperHeight;\n        pd.page_units = loadOptions && loadOptions.paperUnits;\n\n        // signal that the model is ready to use, e.g., to do measurements\n        this.loadDone = true;\n        this.isLeaflet = true;\n        _parent.signalProgress(100, ProgressState.LOADING);\n\n        // Note: When just loading images, we don't know texWidth at this point, but must\n        //       wait for the texture. Therefore, the zoomIn constraint is currently only applied\n        //       if we know the size in advance.\n        if (config.texWidth > 0) {\n          // store hint to restrict zoom-in when we reach max resolution.\n          this.maxPixelPerUnit = config.texWidth / config.getQuadWidth();\n\n          // For simple images the image width might be too low of a value to limit zoom-in,\n          // so as a purely heuristic value, allow 10 times that value\n          if (config.isSimpleImage) {\n            this.maxPixelPerUnit *= 10;\n          }\n        }\n      }\n\n      if (!self.loading) {\n        onDone({ code: ErrorCodes.LOAD_CANCELED, msg: 'Load canceled' }, null);\n        return;\n      }\n\n      var modelData = new LeafletModelData(options.loadOptions);\n      // To be consistent with other loaders and expected by some code setions,\n      // save loadOptions to the model data.\n      modelData.loadOptions = options;\n\n      iter.getVisibleBounds(modelData.bbox);\n\n      modelData.modelSpaceBBox = modelData.bbox.clone();\n\n      if (options.placementTransform) {\n        modelData.placementTransform = options.placementTransform.clone();\n        modelData.placementWithOffset = options.placementTransform.clone();\n        modelData.bbox.applyMatrix4(options.placementTransform);\n      }\n\n      // Create RenderModel with texQuad iterator\n      var model = new Model(modelData);\n      model.initFromCustomIterator(iter);\n      model.loader = self;\n\n      _parent.api.dispatchEvent({ type: et.MODEL_ROOT_LOADED_EVENT, svf: modelData, model: model });\n\n      // Track loading time\n      iter.callWhenRefined(function () {var _modelData$loadOption, _modelData$loadOption2;\n        var t1 = Date.now();\n        modelData.loadTime = t1 - self.t0;\n        logger.log(\"SVF load: \" + modelData.loadTime); // Use SVF to make output consistent with other loaders\n\n        avp.analytics.track('viewer.model.loaded', {\n          load_time: modelData.loadTime,\n          total_raster_pixels: (_modelData$loadOption = modelData.loadOptions.bubbleNode) === null || _modelData$loadOption === void 0 ? void 0 : (_modelData$loadOption2 = _modelData$loadOption.data) === null || _modelData$loadOption2 === void 0 ? void 0 : _modelData$loadOption2.totalRasterPixels });\n\n      });\n\n      onDone(null, model);\n      self.loading = false;\n\n      return model.id;\n    }\n\n    // if we have no leaflet params, handle it as a single image\n    var isSimpleImage = !config.valid();\n    if (isSimpleImage) {\n      // when displaying a single image, we don't know the extents in advance.\n      // But we need them to determine the bbox for the initial camera placement.\n      // Therefore, we defer the loading for this case until the image is loaded.\n      // The image dimensions are then derived from the image file.\n      config.initForSimpleImage(path);\n    }\n\n    config.onRootLoaded = onLoad;\n\n    config.onDone = onDone;\n\n    // Set pixel ratio to the same values as used by WebGLRenderer. In this way, we make full\n    // use of the available render target resolution.\n    config.getPixelRatio = _parent.glrenderer().getPixelRatio;\n    config.maxAnisotropy = _parent.glrenderer().getMaxAnisotropy();\n\n    config.placementTransform = options.placementTransform;\n\n    // create iterator \n    iter = new ModelIteratorTexQuad(config, _parent.getMaterials());\n\n    // Root tile is always needed\n    iter.requestRootTile();\n  };\n\n  /** \n      * @callback LoadSuccessCB\n      *   @param {RenderModel}\n      *\n      * @callback LoadErrorCB\n      *   @param {number} errorCode\n      *   @param {string} errorMsg\n      *   @param {number} statusCode\n      *   @param {string} statusText\n      */\n\n  /*\n         * @param {string}        path\n         * @param {Object}        [options]              Dictionary with options parsed from query string. \n         * @para  {Object}        [options.loadOptions]  For leaflets, this must contain additional params like tileSize, texWidth etc. (see TexQuadConfig.initFromLoadOptions)\n         * @param {number}        [options.acmSessionId] Required when requesting non-public image files. \n         * @param {LoadDoneCB}    onDone \n         */\n  this.loadFile = function (path, options, onDone, onWorkerStart) {\n    if (this.loading) {\n      logger.log(\"Loading of Leaflet already in progress. Ignoring new request.\");\n      return false;\n    }\n\n    var self = this;\n\n    this.options = options;\n    this.t0 = Date.now();\n\n    // get leaflet params from loader options. Note that it's no error if we don't find them,\n    // because simple image files can be loaded without any extra options\n    var config = new TexQuadConfig();\n\n    var textureLoader = null;\n    var acmSessionId = options.acmSessionId;\n\n    if (options.loadOptions && options.loadOptions.loadFromZip) {\n\n      textureLoader = function textureLoader(imageURL, onSuccess, onError) {\n        var currZip;\n        var level = imageURL.split('/')[0] - config.levelOffset;\n\n        // Find the relevant zip by the tile's level.\n        for (var i = 0; i < config.zips.length; i++) {\n          if (level <= config.zips[i].zipMaxLevel) {\n            currZip = config.zips[i];\n            break;\n          }\n        }\n\n        if (!currZip) {\n          onError('Failed loading texture - tile\\'s level doesn\\'t exists.');\n          return false;\n        }\n\n        var fileHeader = currZip.fileTable[imageURL];\n\n        if (!fileHeader) {\n          onError('Failed loading texture - entry does not exist inside fileTable.');\n          return false;\n        }\n\n        var options = { extractImage: extractImage };\n\n        var start = fileHeader.relativeOffset;\n        var end = fileHeader.relativeOffset + fileHeader.contentSize;\n\n        // In case we already have the entire zip's raw data - we don't need to request the texture from the server.\n        // Just load the texture's bytes from rawData.\n        if (currZip.rawData) {\n          options.rawData = currZip.rawData.slice(start, end);\n        } else {\n          options.range = {\n            min: start,\n            max: end };\n\n        }\n\n        TextureLoader.loadTextureWithSecurity(currZip.urnZip, THREE.UVMapping, onSuccess, onError, acmSessionId, true, options);\n      };\n\n      var areAllZipsParsed = function areAllZipsParsed() {\n        return options.loadOptions.zips.every(function (zip) {return Object.keys(zip.fileTable).length > 0;});\n      };\n\n      options.loadOptions.zips.forEach(function (currZip) {\n        // Load the central directory from the zip\n        var centralDirOffset = currZip.centralDirOffset;\n        var centralDirLength = currZip.centralDirLength;\n        var numOfEntries = currZip.centralDirEntries;\n\n        var onGetContentSuccess = function onGetContentSuccess(rawBuffer) {\n          if (isOffline()) {\n            currZip.rawData = rawBuffer;\n            rawBuffer = rawBuffer.slice(centralDirOffset, centralDirOffset + centralDirLength);\n          }\n\n          var fileTable = parseCentralDirectory(rawBuffer, centralDirOffset, numOfEntries);\n\n          if (!fileTable) {\n            onDone('Failed parsing central directory of the zip.', null);\n            return false;\n          }\n\n          currZip.fileTable = fileTable;\n\n          if (areAllZipsParsed()) {\n            self.continueLoadFile(path, options, onDone, onWorkerStart, config, textureLoader);\n          }\n        };\n\n        var onGetContentError = function onGetContentError(error) {\n          logger.error('Zip download failed: ' + error.statusText, errorCodeString(ErrorCodes.NETWORK_FAILURE));\n          onDone('Zip download failed: ' + error.statusText, null);\n        };\n\n        getCentralDirectory(currZip.urnZip, acmSessionId, centralDirOffset, centralDirLength, onGetContentSuccess, onGetContentError);\n      });\n\n    } else {\n      textureLoader = function textureLoader(imageURL, onSuccess, onError) {\n        TextureLoader.loadTextureWithSecurity(imageURL, THREE.UVMapping, onSuccess, onError, acmSessionId, true);\n      };\n\n      this.continueLoadFile(path, options, onDone, onWorkerStart, config, textureLoader);\n    }\n\n    // Mark it as loading now.\n    this.loading = true;\n\n    return true;\n  };\n\n\n  this.dtor = function () {\n    this.loading = false;\n  };\n}\n\nLeafletLoader.prototype.is3d = function () {\n  return false;\n};\n\nLeafletLoader.prototype.isPageCoordinates = function () {var _this$options, _this$options$loadOpt;\n  return !!((_this$options = this.options) === null || _this$options === void 0 ? void 0 : (_this$options$loadOpt = _this$options.loadOptions) === null || _this$options$loadOpt === void 0 ? void 0 : _this$options$loadOpt.fitPaperSize);\n};\n\nFileLoaderManager.registerFileLoader(\"Leaflet\", [\"jpeg\", \"jpg\", \"png\"], LeafletLoader);","function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {try {var info = gen[key](arg);var value = info.value;} catch (error) {reject(error);return;}if (info.done) {resolve(value);} else {Promise.resolve(value).then(_next, _throw);}}function _asyncToGenerator(fn) {return function () {var self = this,args = arguments;return new Promise(function (resolve, reject) {var gen = fn.apply(self, args);function _next(value) {asyncGeneratorStep(gen, resolve, reject, _next, _throw, \"next\", value);}function _throw(err) {asyncGeneratorStep(gen, resolve, reject, _next, _throw, \"throw\", err);}_next(undefined);});};}\nimport { LmvMatrix4 as Matrix4 } from '../../wgs/scene/LmvMatrix4';\nimport { LmvBox3 as Box3 } from '../../wgs/scene/LmvBox3';\nimport { LmvVector3 as Vector3 } from '../../wgs/scene/LmvVector3';\nimport { logger } from \"../../logger/Logger\";\nimport { TextureLoader } from \"./TextureLoader\";\nimport { NodeArray } from \"../../wgs/scene/BVHBuilder\";\nimport { MeshFlags } from '../../wgs/scene/MeshFlags';\nimport { PropDbLoader } from \"./PropDbLoader\";\nimport { initWorkerScript, createWorkerWithIntercept } from \"./WorkerCreator\";\nimport { initLoadContext } from \"../net/endpoints\";\nimport { pathToURL, ViewingService } from \"../net/Xhr\";\nimport { OtgPackage, FLUENT_URN_PREFIX, DS_OTG_CDN_PREFIX } from \"../lmvtk/otg/Otg\";\nimport { FileLoaderManager } from \"../../application/FileLoaderManager\";\nimport { Model } from \"../../application/Model\";\nimport * as et from \"../../application/EventTypes\";\nimport { ProgressState } from '../../application/ProgressState';\nimport { isMobileDevice } from \"../../compat\";\nimport { MESH_RECEIVE_EVENT, MESH_FAILED_EVENT, MATERIAL_RECEIVE_EVENT, MATERIAL_FAILED_EVENT } from \"./OtgResourceCache\";\nimport { blobToJson } from \"../lmvtk/common/StringUtils\";\n//import { createWireframe } from \"../../wgs/scene/DeriveTopology;\n\nvar WORKER_LOAD_OTG_BVH = \"LOAD_OTG_BVH\";\nvar av = Autodesk.Viewing;\nvar avp = Autodesk.Viewing.Private;\n\n/** @constructor */\nexport function OtgLoader(parent) {\n  this.viewer3DImpl = parent;\n  this.loading = false;\n  this.tmpMatrix = new Matrix4();\n  this.tmpBox = new Box3();\n\n  this.logger = logger;\n  this.loadTime = 0;\n\n  this.pendingMaterials = {};\n  this.pendingMaterialsCount = 0;\n\n  this.pendingMeshes = {};\n  this.pendingMeshesCount = 0;\n\n  this.operationsDone = 0;\n}\n\n\nOtgLoader.prototype.dtor = function () {\n  // Cancel all potential process on loading a file.\n\n  // 1. init worker script can be cancelled.\n  //\n  if (this.initWorkerScriptToken) {\n    this.initWorkerScriptToken.cancel();\n    this.initWorkerScriptToken = null;\n    logger.debug(\"SVF loader dtor: on init worker script.\");\n  }\n\n  // 2. load model root (aka. svf) can be cancelled.\n  //\n  if (this.bvhWorker) {\n    this.bvhWorker.clearAllEventListenerWithIntercept();\n    this.bvhWorker.terminate();\n    this.bvhWorker = null;\n    logger.debug(\"SVF loader dtor: on svf worker.\");\n  }\n\n\n  if (this.svf) {\n\n    if (!this.svf.loadDone)\n    console.log(\"stopping load before it was complete\");\n\n    this.svf.abort();\n\n    if (this.svf.propDbLoader) {\n      this.svf.propDbLoader.dtor();\n      this.svf.propDbLoader = null;\n    }\n  }\n\n\n  // 5. Cancel all running requests in shared geometry worker\n  //\n  if (this.viewer3DImpl.geomCache() && this.model) {\n    if (this.loading)\n    this.viewer3DImpl.geomCache().cancelRequests(this.svf.geomMetadata.hashToIndex);\n\n    this.removeMeshReceiveListener();\n  }\n\n  // and clear metadata.\n  this.viewer3DImpl = null;\n  this.model = null;\n  this.svf = null;\n  this.logger = null;\n  this.tmpMatrix = null;\n\n  this.loading = false;\n  this.loadTime = 0;\n};\n\nOtgLoader.prototype.isValid = function () {\n  return this.viewer3DImpl != null;\n};\n\n// Stop listening to mesh receive events\nOtgLoader.prototype.removeMeshReceiveListener = function () {\n  if (this.meshReceiveListener) {\n    this.viewer3DImpl.geomCache().updateMruTimestamps();\n    this.viewer3DImpl.geomCache().removeEventListener(MESH_RECEIVE_EVENT, this.meshReceiveListener);\n    this.viewer3DImpl.geomCache().removeEventListener(MESH_FAILED_EVENT, this.meshReceiveListener);\n    this.viewer3DImpl.geomCache().removeEventListener(MATERIAL_RECEIVE_EVENT, this.materialReceiveListener);\n    this.viewer3DImpl.geomCache().removeEventListener(MATERIAL_FAILED_EVENT, this.materialReceiveListener);\n    this.meshReceiveListener = null;\n  }\n};\n\nOtgLoader.prototype.loadFile = function (path, options, onDone, onWorkerStart) {\n  if (!this.viewer3DImpl) {\n    logger.log(\"SVF loader was already destructed. So no longer usable.\");\n    return false;\n  }\n\n  if (this.loading) {\n    logger.log(\"Loading of SVF already in progress. Ignoring new request.\");\n    return false;\n  }\n\n  // Mark it as loading now.\n  this.loading = true;\n\n  //For OTG server, the URN of the manifest is used as part of the ACM session token\n  if (options.acmSessionId) {\n    //TODO: initWorker should be updated to also send the acmsession when authorizing the web worker,\n    //in a followup change.\n    this.svfUrn = options.acmSessionId.split(\",\")[0];\n  } else {\n    //If the URN is not supplied, we can derive it from the storage path,\n    //but that will only work for URNs that are not shallow copies.\n    console.warn(\"DEPRECATED: Automatic derivation of URN will be removed in a future release. Please set the acmSessionId parameter when loading OTG data.\");\n\n    var idx = path.indexOf(FLUENT_URN_PREFIX);\n    if (idx === -1) {\n      idx = path.indexOf(DS_OTG_CDN_PREFIX);\n    }\n\n    if (idx !== -1) {\n\n      //This will work for WIP URNs but probably not OSS ones, where\n      //the URN is an encoding of the OSS file name or something equally arbitrary\n      var parts = path.split(\"/\");\n      var seed = parts[1];\n      var version = parts[2];\n      var urn = seed + \"?version=\" + version;\n      var encoded = av.toUrlSafeBase64(urn);\n\n      this.svfUrn = encoded;\n    }\n  }\n\n  this.sharedDbPath = options.sharedPropertyDbPath;\n\n  this.currentLoadPath = path;\n  var basePath = \"\";\n  var lastSlash = this.currentLoadPath.lastIndexOf(\"/\");\n  if (lastSlash != -1)\n  basePath = this.currentLoadPath.substr(0, lastSlash + 1);\n\n  this.basePath = basePath;\n  this.acmSessionId = options.acmSessionId;\n\n  this.options = options;\n  this.queryParams = options.acmSessionId ? \"acmsession=\" + options.acmSessionId : \"\";\n  var loadContext = {\n    basePath: basePath,\n    objectIds: options.ids,\n    globalOffset: options.globalOffset,\n    fragmentTransformsDouble: options.fragmentTransformsDouble,\n    placementTransform: options.placementTransform,\n    applyRefPoint: options.applyRefPoint,\n    queryParams: this.queryParams,\n    bvhOptions: options.bvhOptions || { isWeakDevice: isMobileDevice() },\n    applyScaling: options.applyScaling,\n    applyPlacementInModelUnits: options.applyPlacementInModelUnits,\n    loadInstanceTree: options.loadInstanceTree };\n\n\n  this.loadContext = initLoadContext(loadContext);\n\n  // The request failure parameters received by onFailureCallback (e.g. httpStatusCode) cannot just be forwarded to onDone().\n  // Instead, we have to pass them through ViewingService.defaultFailureCallback, which converts them to error parameters\n  // and calls loadContext.raiseError with them.\n  loadContext.raiseError = function (code, msg, args) {\n    var error = { \"code\": code, \"msg\": msg, \"args\": args };\n    onDone && onDone(error);\n  };\n  loadContext.onFailureCallback = ViewingService.defaultFailureCallback.bind(loadContext);\n\n  this.loadModelRoot(loadContext, onDone);\n\n  //We don't use a worker for OTG root load, so we call this back immediately\n  //We will use the worker for heavy tasks like BVH compute after we get the model root file.\n  onWorkerStart && onWorkerStart();\n\n  return true;\n};\n\n\nOtgLoader.prototype.loadModelRoot = function (loadContext, onDone) {\n  this.t0 = new Date().getTime();\n  this.firstPixelTimestamp = null;\n  var scope = this;\n\n  var WORKER_SCRIPT_READY = false;\n  var _pendingMessages = {};\n\n  this.initWorkerScriptToken = initWorkerScript(function () {\n    WORKER_SCRIPT_READY = true;\n\n    for (var id in _pendingMessages) {\n      if (_pendingMessages.hasOwnProperty(id)) {\n        _pendingMessages[id].forEach(function (data) {\n          loadContext.onLoaderEvent(id, data);\n        });\n      }\n    }\n    _pendingMessages = {};\n  });\n\n  var svf = this.svf = new OtgPackage();\n\n  svf.basePath = loadContext.basePath;\n\n  //Those events happen on the main thread, unlike SVF loading where\n  //everything happens in the svfWorker\n  loadContext.onLoaderEvent = function (whatIsDone, data) {\n\n    if (!scope.svf) {\n      console.error(\"load callback called after load was aborted\");\n      return;\n    }\n\n    // Make sure that the worker script is ready by the time the messages are processed.\n    // This is related to LMV-4719\n    if (!WORKER_SCRIPT_READY) {\n      if (!_pendingMessages.hasOwnProperty(whatIsDone))\n      _pendingMessages[whatIsDone] = [];\n      _pendingMessages[whatIsDone].push(data);\n      return;\n    }\n\n    if (whatIsDone === \"otg_root\") {\n\n      scope.onModelRootLoadDone(svf);\n\n      if (onDone)\n      onDone(null, scope.model);\n\n      scope.makeBVHInWorker();\n\n      // init shared cache on first use\n      var geomCache = scope.viewer3DImpl.geomCache();\n\n      if (!geomCache) {\n        // If this loader would create an own cache, it could be a hidden memory waste.\n        // So it's better to complain.\n        logger.error(\"geomCache is required for loading OTG models.\");\n      }\n\n      geomCache.initWorker(scope.options.acmSessionId);\n\n      scope.meshReceiveListener = function (data) {\n        if (data.error && data.error.args) {\n          scope.onMeshError(data);\n        } else {\n          scope.onMeshReceived(data.geom);\n        }\n      };\n\n      geomCache.addEventListener(MESH_RECEIVE_EVENT, scope.meshReceiveListener);\n      geomCache.addEventListener(MESH_FAILED_EVENT, scope.meshReceiveListener);\n\n      scope.materialReceiveListener = function (data) {\n        if (data.error || !data.material || !data.material.length) {\n          scope.onMaterialLoaded(null, data.hash);\n        } else {\n          scope.onMaterialLoaded(blobToJson(data.material), data.hash);\n        }\n      };\n\n      geomCache.addEventListener(MATERIAL_RECEIVE_EVENT, scope.materialReceiveListener);\n      geomCache.addEventListener(MATERIAL_FAILED_EVENT, scope.materialReceiveListener);\n\n      scope.svf.loadDone = false;\n\n    } else if (whatIsDone === \"fragment\") {\n\n      if (!scope.options.skipMeshLoad)\n      scope.tryToActivateFragment(data, \"fragment\");\n\n      // Optional: Track fragment load progress separately \n      if (scope.options.onFragmentListLoadProgress) {\n        scope.trackFragmentListLoadProgress();\n      }\n\n    } else if (whatIsDone === \"all_fragments\") {\n\n      //For 3D models, we can start loading the property database as soon\n      //as we know the fragment list which contains the fragId->dbId map.\n      if (!scope.options.skipPropertyDb) {\n        scope.loadPropertyDb();\n      }\n\n      scope.viewer3DImpl.api.fireEvent({ type: et.MODEL_ROOT_LOADED_EVENT, svf: svf, model: scope.model });\n\n\n      if (scope.options.skipMeshLoad || !scope.svf.fragments.length) {\n        scope.onGeomLoadDone();\n      } else\n      scope.onOperationComplete();\n\n    } else if (whatIsDone === \"bvh\") {\n      var bvh = data;\n      if (scope.model) {\n\n        scope.model.setBVH(bvh.nodes, bvh.primitives, scope.options.bvhOptions);\n\n        if (scope.viewer3DImpl) {\n\n          // Refresh viewer if model is visible.\n          if (scope.viewer3DImpl.modelVisible(scope.model.id)) {\n            scope.viewer3DImpl.invalidate(false, true);\n          }\n        }\n      }\n\n      scope.onOperationComplete();\n\n    }\n  };\n\n  svf.beginLoad(loadContext, pathToURL(scope.currentLoadPath));\n\n  return true;\n};\n\nfunction copyBoxes(fboxes, e) {\n\n  // Note that the loaded boxes are mixed with flags, so we need to copy them and skip the other data\n  var eboxes = e.data.boxes;\n  var stride = e.data.boxStride;\n  var boxCount = eboxes.length / stride;\n\n  for (var fragId = 0, srcOffset = 0, dstOffset = 0; fragId < boxCount; fragId++, srcOffset += stride, dstOffset += 6) {\n    fboxes[dstOffset + 0] = eboxes[srcOffset + 0];\n    fboxes[dstOffset + 1] = eboxes[srcOffset + 1];\n    fboxes[dstOffset + 2] = eboxes[srcOffset + 2];\n    fboxes[dstOffset + 3] = eboxes[srcOffset + 3];\n    fboxes[dstOffset + 4] = eboxes[srcOffset + 4];\n    fboxes[dstOffset + 5] = eboxes[srcOffset + 5];\n  }\n}\n\nOtgLoader.prototype.makeBVHInWorker = function () {\n\n  var scope = this;\n\n  scope.bvhWorker = createWorkerWithIntercept();\n\n  var onOtgWorkerEvent = function onOtgWorkerEvent(e) {\n    if (e.data.bvh) {\n\n      console.log(\"Received BVH from worker\");\n\n      var bvh = e.data.bvh;\n      if (scope.model) {\n\n        scope.svf.bvh = bvh;\n        scope.model.setBVH(new NodeArray(bvh.nodes, bvh.useLeanNodes), bvh.primitives, scope.options.bvhOptions);\n\n        if (scope.viewer3DImpl) {\n\n          // Refresh viewer if model is visible.\n          if (scope.viewer3DImpl.modelVisible(scope.model.id)) {\n            scope.viewer3DImpl.invalidate(false, true);\n          }\n        }\n      }\n\n      scope.bvhWorker.clearAllEventListenerWithIntercept();\n      scope.bvhWorker.terminate();\n      scope.bvhWorker = null;\n\n      scope.onOperationComplete();\n    }\n\n    if (e.data.boxes && scope.model) {\n      var frags = scope.model.myData.fragments;\n\n      copyBoxes(frags.boxes, e);\n\n      // Make sure that subsequent setMesh() calls don't overwrite the boxes with computed ones.\n      // This would happen otherwise as soon as more geometry is loaded.\n      frags.boxesLoaded = true;\n\n      // Make sure that model box does not keep outdated values\n      scope.model.visibleBoundsDirty = true;\n    }\n  };\n\n  scope.bvhWorker.addEventListenerWithIntercept(onOtgWorkerEvent);\n\n  //We can kick off the request for the fragments-extra file, needed\n  //for the BVH build as soon as we have the metadata (i.e. placement transform)\n  //Do this on the worker thread, because the BVH build can take a while.\n  var workerContext = Object.assign({}, scope.loadContext);\n  workerContext.operation = WORKER_LOAD_OTG_BVH;\n  workerContext.raiseError = null;\n  workerContext.onFailureCallback = null;\n  workerContext.onLoaderEvent = null;\n  workerContext.fragments_extra = pathToURL(scope.basePath) + scope.svf.manifest.assets.fragments_extra;\n  workerContext.placementTransform = scope.svf.placementTransform;\n  workerContext.placementWithOffset = scope.svf.placementWithOffset;\n  workerContext.fragmentTransformsOffset = scope.svf.metadata.fragmentTransformsOffset;\n  workerContext.globalOffset = scope.svf.globalOffset;\n\n  if (workerContext.fragments_extra) {\n    scope.bvhWorker.doOperation(workerContext);\n  } else {\n    // If the model does not reference a fragment_extra file, the worker would not do anything.\n    // This is okay for empty models. For this case, just skip the BVH phase to avoid the load progress from hanging.\n    scope.onOperationComplete();\n  }\n};\n\n//Attempts to turn on display of a received fragment.\n//If the geometry or material is missing, issue requests for those\n//and delay the activation. Once the material or mesh comes in, they\n//will attempt this function again.\nOtgLoader.prototype.tryToActivateFragment = function (fragId, whichCaller) {\n\n  var svf = this.svf;\n  var rm = this.model;\n\n  //Was loading canceled?\n  if (!rm)\n  return;\n\n  var flags = svf.fragments.visibilityFlags[fragId];\n  var skipLoad = flags & MeshFlags.MESH_NOTLOADED;\n\n  // Skip fragments with hide-flag. (e.g. hidden room geometry)\n  // These are not intended for display, but rather for custom tools.\n  //TODO: Check if not loading of hidden meshes causes side effects downstream,\n  //like in the diff tool which waits for specific meshes to load.\n  if (skipLoad) {\n    rm.getFragmentList().setFlagFragment(fragId, MeshFlags.MESH_NOTLOADED, true);\n    this.trackGeomLoadProgress(svf, fragId, false);\n    return;\n  }\n\n  var haveToWait = false;\n\n  //The tryToActivate function can be called up to three times, until all the\n  //needed parts are received.\n  // Before we can safely consider a fragment as finished, we must make sure that there are no pending\n  // tryToActivate(fragId, \"material\") or \"geometry\" calls that will come later.\n\n  //1. Check if the material is done\n\n  var materialId = svf.fragments.materials[fragId];\n  var matHash = svf.getMaterialHash(materialId);\n  var material = this.findOrLoadMaterial(rm, matHash, materialId);\n  if (!material) {\n\n    if (whichCaller === \"fragment\") {\n      //Material is not yet available, so we will delay turning on the fragment until it arrives\n      this.pendingMaterials[matHash].push(fragId);\n    }\n\n    if (whichCaller !== \"material\") {\n      haveToWait = true;\n    } else {\n      //it means the material failed to load, so we won't wait for it.\n    }\n  }\n\n\n  //2. Check if the mesh is done\n\n  // Note that otg translation may assign geomIndex 0 to some fragments by design.\n  // This happens when the source fragment geometry was degenerated.\n  // Therefore, we do not report any warning or error for this case.\n  //don't block overall progress because of this -- mark the fragment as success.\n  var geomId = svf.fragments.geomDataIndexes[fragId];\n  if (geomId === 0) {\n    if (material || whichCaller === \"material\") {\n      // A fragment with null-geom may still have a material. If so, we wait for the material before we consider it as finished.\n      // This makes sure that we don't count this fragment twice. Note that we cannot just check whichCaller===\"fragment\" here:\n      // This would still cause errors if the material comes in later after onGeomLoadDone().\n      this.trackGeomLoadProgress(svf, fragId, false);\n    }\n    return;\n  }\n\n  //We get the matrix from the fragments and we pass it back into setupMesh\n  //with the activateFragment call, but this is to maintain the\n  //ability to add a plain THREE.Mesh -- otherwise it could be simpler\n  rm.getFragmentList().getOriginalWorldMatrix(fragId, this.tmpMatrix);\n\n  var geom = rm.getGeometryList().getGeometry(geomId);\n  if (!geom) {\n\n    if (whichCaller === \"fragment\") {\n      //Mesh is not yet available, so we will request it and\n      //delay turning on the fragment until it arrives\n      this.loadGeometry(geomId, fragId);\n    }\n\n    haveToWait = true;\n  }\n\n  if (haveToWait)\n  return;\n\n  //if (this.options.createWireframe)\n  //    createWireframe(geom, this.tmpMatrix);\n\n  var m = this.viewer3DImpl.setupMesh(rm, geom, matHash, this.tmpMatrix);\n\n  // provide correct geometry id. (see GeometryList.setMesh). Note that we cannot use\n  // geom.svfid, because geomIds are model-specific and geometries may be shared.\n  m.geomId = geomId;\n\n  //If there is a placement transform, we tell activateFragment to also recompute the\n  //world space bounding box of the fragment from the raw geometry model box, for a tighter\n  //fit compared to what we get when loading the fragment list initially.\n  rm.activateFragment(fragId, m, !!svf.placementTransform);\n\n  // pass new fragment to Geometry cache to update priority\n  // TODO: Check if we can determine the bbox earlier, so that we can also use it to prioritize load requests\n  //       from different OtgLoaders.\n  this.viewer3DImpl.geomCache().updateGeomImportance(rm, fragId);\n\n  this.trackGeomLoadProgress(svf, fragId, false);\n\n};\n\nOtgLoader.prototype.onModelRootLoadDone = function (svf) {\n\n  // Mark svf as Oscar-file. (which uses sharable materials and geometry)\n  svf.isOTG = true;\n\n  svf.geomMetadata.hashToIndex = {};\n\n  svf.failedFrags = {};\n  svf.failedMeshes = {};\n  svf.failedMaterials = {};\n\n  svf.geomMemory = 0;\n  svf.gpuNumMeshes = 0;\n  svf.gpuMeshMemory = 0;\n\n  // counts fully loaded fragments (including geometry and material)\n  svf.fragsLoaded = 0;\n\n  // number of loaded fragments (also the ones for which we didn't load material and geom yet)  \n  svf.fragsLoadedNoGeom = 0;\n\n  svf.nextRepaintPolys = 0;\n  svf.numRepaints = 0;\n\n  svf.urn = this.svfUrn;\n  svf.acmSessionId = this.acmSessionId;\n\n  svf.basePath = this.basePath;\n\n  svf.loadOptions = this.options;\n\n  var t1 = Date.now();\n  this.loadTime += t1 - this.t0;\n  logger.log(\"SVF load: \" + (t1 - this.t0));\n\n  // Create the API Model object and its render proxy\n  var model = this.model = new Model(svf);\n  model.loader = this;\n\n  model.initialize();\n\n  this.t0 = t1;\n\n  //The BBox object loses knowledge of its\n  //type when going across the worker thread boundary...\n  svf.bbox = new Box3().copy(svf.bbox);\n\n  if (svf.refPointTransform) {\n    svf.refPointTransform = new Matrix4(true).copy(svf.refPointTransform);\n  }\n  if (svf.placementTransform) {\n    svf.placementTransform = new Matrix4(true).copy(svf.placementTransform);\n  }\n\n  //Camera vectors also lose their prototypes when they\n  //cross the thread boundary...\n  if (svf.cameras) {\n    for (var i = 0; i < svf.cameras.length; i++) {\n      var camera = svf.cameras[i];\n      camera.position = new Vector3().copy(camera.position);\n      camera.target = new Vector3().copy(camera.target);\n      camera.up = new Vector3().copy(camera.up);\n    }\n  }\n\n  logger.log(\"scene bounds: \" + JSON.stringify(svf.bbox));\n\n  var metadataStats = {\n    category: \"metadata_load_stats\",\n    urn: svf.urn,\n    has_topology: !!svf.topology,\n    has_animations: !!svf.animations,\n    materials: svf.metadata.stats.num_materials,\n    is_mobile: isMobileDevice() };\n\n  logger.track(metadataStats);\n\n  this.viewer3DImpl.signalProgress(5, ProgressState.ROOT_LOADED, this.model);\n\n  svf.handleHashListRequestFailures(this.loadContext);\n\n  svf.propDbLoader = new PropDbLoader(this.sharedDbPath, this.model, this.viewer3DImpl.api);\n\n  // We don't call invalidate here: At this point, the model is not added to the viewer yet (see onSuccess()\n  // in Viewer3D.loadModel). So, invalidating would just let other models flicker.\n};\n\n\n// Returns geometry loading progress in integer percent\nfunction getProgress(svf) {\n  return Math.floor(100 * svf.fragsLoaded / svf.metadata.stats.num_fragments);\n}\n\n// Called whenever a geom load request is finished or or has failed.\nOtgLoader.prototype.trackGeomLoadProgress = function (svf, fragId, failed) {\n\n  if (failed) {\n    //TODO: failedFrags can be removed, once we make sure\n    //that we are not calling this function with the same fragment twice.\n    if (svf.failedFrags[fragId]) {\n      console.log(\"Double fail\", fragId);\n      return;\n    }\n\n    svf.failedFrags[fragId] = 1;\n  }\n\n  // Inc geom counter and track progress in percent\n  var lastPercent = getProgress(svf);\n\n  svf.fragsLoaded++;\n\n  var curPercent = getProgress(svf);\n\n  // Signal progress, but not for each single geometry. Just if the percent value actually changed.\n  if (curPercent > lastPercent) {\n    this.viewer3DImpl.signalProgress(curPercent, ProgressState.LOADING, this.model);\n    //console.log(curPercent, \"%\");\n    //console.log(svf.fragsLoaded, svf.metadata.stats.num_fragments);\n  }\n\n  //repaint every once in a while -- more initially, less as the load drags on.\n  var geomList = this.model.getGeometryList();\n  if (geomList.geomPolyCount > svf.nextRepaintPolys) {\n    //logger.log(\"num loaded \" + numLoaded);\n    this.firstPixelTimestamp = this.firstPixelTimestamp || Date.now();\n    svf.numRepaints++;\n    svf.nextRepaintPolys += 100000 * Math.pow(1.5, svf.numRepaints);\n\n    // refresh viewer if model is visible\n    if (this.viewer3DImpl.modelVisible(this.model.id)) {\n      //console.log(\"Repaint\");\n\n      this.viewer3DImpl.invalidate(false, true);\n    }\n  }\n\n  //console.log(svf.fragsLoaded, svf.metadata.stats.num_fragments);\n\n  // If this was the last geom to receive...\n  if (svf.fragsLoaded === svf.metadata.stats.num_fragments) {\n    // Signal that we are done with mesh loading\n    this.onOperationComplete();\n  }\n\n};\n\nOtgLoader.prototype.trackFragmentListLoadProgress = function () {\n\n  var svf = this.svf;\n  function getFragListLoadProgress(svf) {\n    return Math.floor(100 * svf.fragsLoadedNoGeom / svf.metadata.stats.num_fragments);\n  }\n  var lastPercent = getFragListLoadProgress(svf);\n  svf.fragsLoadedNoGeom++;\n  var percent = getFragListLoadProgress(svf);\n\n  if (percent > lastPercent) {\n    this.options.onFragmentListLoadProgress(this.model, percent);\n  }\n};\n\nOtgLoader.prototype.onOperationComplete = function () {\n  this.operationsDone++;\n\n  //Destroy the loader if everything we are waiting to load is done\n  if (this.operationsDone === 3)\n  this.onGeomLoadDone();\n};\n\n\nOtgLoader.prototype.onMaterialLoaded = /*#__PURE__*/function () {var _ref = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee(matObj, matHash, matId) {var fragments, matman, surfaceMat, i;return regeneratorRuntime.wrap(function _callee$(_context) {while (1) {switch (_context.prev = _context.next) {case 0:if (\n\n            this.loading) {_context.next = 2;break;}return _context.abrupt(\"return\");case 2:\n\n\n\n\n\n            // get fragIds that need this material\n            fragments = this.pendingMaterials[matHash];\n\n            // Note that onMaterialLoaded is triggered by an EvenListener on geomCache. So, we may also receive calls\n            // for materials that we are not wait for, just because other loaders have requested them in parallel.\n            // In this case, we must ignore the event.\n            if (fragments) {_context.next = 5;break;}return _context.abrupt(\"return\");case 5:\n\n\n\n            matman = this.viewer3DImpl.matman();if (!\n\n            matObj) {_context.next = 21;break;}\n\n            matObj.hash = matHash;_context.prev = 8;_context.next = 11;return (\n\n              matman.convertSharedMaterial(this.model, matObj, matHash));case 11:surfaceMat = _context.sent;\n\n            TextureLoader.loadMaterialTextures(this.model, surfaceMat, this.viewer3DImpl);\n\n            if (matman.hasTwoSidedMaterials()) {\n              this.viewer3DImpl.renderer().toggleTwoSided(true);\n            }_context.next = 19;break;case 16:_context.prev = 16;_context.t0 = _context[\"catch\"](8);\n\n            this.svf.failedMaterials[matHash] = 1;case 19:_context.next = 22;break;case 21:\n\n\n\n\n            this.svf.failedMaterials[matHash] = 1;case 22:\n\n\n\n            for (i = 0; i < fragments.length; i++) {\n              this.tryToActivateFragment(fragments[i], \"material\");\n            }\n\n            this.pendingMaterialsCount--;\n            delete this.pendingMaterials[matHash];case 25:case \"end\":return _context.stop();}}}, _callee, this, [[8, 16]]);}));return function (_x, _x2, _x3) {return _ref.apply(this, arguments);};}();\n\n\nOtgLoader.prototype.findOrLoadMaterial = function (model, matHash, matId) {\n\n  //check if it's already requested, but the request is not complete\n  //\n  // NOTE: If another OTG loader adds this material during loading, matman.findMaterial(..) may actually succeed already - even if we have a pending request.\n  //       However, we consider the material as missing until the request is finished. In this way, only 2 cases are possible:\n  //        a) A material was already loaded on first need => No material requests\n  //        b) We requested the material => Once the request is finished, tryToActivate() will be triggered\n  //           for ALL fragments using the material - no matter whether the material was added meanwhile by someone else or not.\n  //\n  //       If we would allow to get materials earlier, it would get very confusing to find out when a fragment is actually finished:\n  //       Some fragments would be notified when the load request is done, but some would not - depending on timing.\n  if (this.pendingMaterials[matHash]) {\n    return false;\n  }\n\n  var svf = this.svf;\n\n  //Check if it's already in the material manager\n  var matman = this.viewer3DImpl.matman();\n  var mat = matman.findMaterial(model, matHash);\n\n  if (mat)\n  return true;\n\n  //If it's not even requested yet, kick off the request\n  this.pendingMaterialsCount++;\n  this.pendingMaterials[matHash] = [];\n\n  var isCDN = !!this.loadContext.otg_cdn;\n\n  var url = svf.makeSharedResourcePath(this.loadContext.otg_cdn, \"materials\", matHash);\n\n  // load geometry or get it from cache\n  var geomCache = this.viewer3DImpl.geomCache();\n  geomCache.requestMaterial(url, isCDN, matHash, matId, this.queryParams);\n\n  return false;\n};\n\nOtgLoader.prototype.loadGeometry = function (geomIdx, fragId) {\n\n  var svf = this.svf;\n\n  //get the hash string that points to the geometry\n  var geomHash = svf.getGeometryHash(geomIdx);\n\n  //check if it's already requested, but the request is not complete\n  if (this.pendingMeshes[geomHash]) {\n    this.pendingMeshes[geomHash].push(fragId);\n    return false;\n  }\n\n  //If it's not even requested yet, kick off the request\n  this.pendingMeshesCount++;\n  this.pendingMeshes[geomHash] = [fragId];\n\n  var isCDN = !!this.loadContext.otg_cdn;\n\n\n  svf.geomMetadata.hashToIndex[geomHash] = geomIdx;\n\n  var url = svf.makeSharedResourcePath(this.loadContext.otg_cdn, \"geometry\", geomHash);\n\n  // load geometry or get it from cache\n  var geomCache = this.viewer3DImpl.geomCache();\n  geomCache.requestGeometry(url, isCDN, geomHash, geomIdx, this.queryParams);\n};\n\nOtgLoader.prototype.onMeshError = function (mdata) {\n\n  var geomHash = mdata.error.args.hash;\n\n  this.svf.failedMeshes[geomHash] = 1;\n\n  var frags = this.pendingMeshes[geomHash];\n\n  if (!frags) {\n    // The failed mesh has been requested by other loaders, but not by this one.\n    return;\n  }\n\n  for (var i = 0; i < frags.length; i++) {\n    this.trackGeomLoadProgress(this.svf, frags[i], true);\n  }\n\n  delete this.svf.geomMetadata.hashToIndex[geomHash];\n  delete this.pendingMeshes[geomHash];\n\n  this.pendingMeshesCount--;\n\n};\n\nOtgLoader.prototype.onMeshReceived = function (geom) {\n\n  var rm = this.model;\n\n  if (!rm) {\n    console.warn(\"Received geometry after loader was done. Possibly leaked event listener?\", geom.hash);\n    return;\n  }\n\n  var gl = rm.getGeometryList();\n\n  var geomId = this.svf.geomMetadata.hashToIndex[geom.hash];\n\n  //It's possible this fragment list does not use this geometry\n  if (geomId === undefined)\n  return;\n\n  var geomAlreadyAdded = gl.getGeometry(geomId);\n\n  var frags = this.pendingMeshes[geom.hash];\n\n  //TODO: The instance count implied by frags.length is not necessarily correct\n  //because the fragment list is loaded progressively and the mesh could be received\n  //before all the fragments that reference it. Here we don't need absolute correctness.\n  if (!geomAlreadyAdded)\n  gl.addGeometry(geom, frags && frags.length || 1, geomId);else\n\n  return; //geometry was already received, possibly due to sharing with the request done by another model loader in parallel\n\n  if (this.svf.loadDone) {\n    console.error(\"Geometry received after load was done\");\n  }\n\n  for (var i = 0; i < frags.length; i++) {\n    this.tryToActivateFragment(frags[i], \"geom\");\n  }\n\n  delete this.svf.geomMetadata.hashToIndex[geom.hash];\n  delete this.pendingMeshes[geom.hash];\n  this.pendingMeshesCount--;\n};\n\n\nOtgLoader.prototype.onGeomLoadDone = function () {\n  this.svf.loadDone = true;\n\n  // Stop listening to geometry receive events. Since all our geometry is loaded, any subsequent geom receive\n  // events are just related to requests from other loaders.\n  this.removeMeshReceiveListener();\n\n  //Note that most materials are probably done already as their geometry\n  //is received, so this logic will most likely just trigger the textureLoadComplete event.\n  TextureLoader.loadModelTextures(this.model, this.viewer3DImpl);\n\n  //If we were asked to just load the model root / metadata, bail early.\n  if (this.options.skipMeshLoad) {\n    this.currentLoadPath = null;\n    this.viewer3DImpl.onLoadComplete(this.model);\n    return;\n  }\n\n  // We need to keep a copy of the original fragments\n  // transforms in order to restore them after explosions, etc.\n  // the rotation/scale 3x3 part.\n  // TODO: consider only keeping the position vector and throwing out\n  //\n  //delete this.svf.fragments.transforms;\n\n  // Release that won't be used. the on demand loading won't call this anyway.\n  this.svf.fragments.entityIndexes = null;\n  this.svf.fragments.mesh2frag = null;\n  this.svf.geomMetadata.hashes = null;\n\n  var t1 = Date.now();\n  var msg = \"Fragments load time: \" + (t1 - this.t0);\n  this.loadTime += t1 - this.t0;\n\n  var firstPixelTime = this.firstPixelTimestamp - this.t0;\n  msg += ' (first pixel time: ' + firstPixelTime + ')';\n\n  logger.log(msg);\n\n  // Run optional consolidation step\n  if (this.options.useConsolidation) {\n    // TODO: I don't really like to access the viewer and (even worse) the renderer here. But for the\n    //       consolidation, we need it to know whether we can use instancing and to dispose individual fragemnts\n    //       from GPU to make space for the consolidated ones.\n    var glRenderer = this.viewer3DImpl.glrenderer();\n\n    this.model.consolidate(this.viewer3DImpl.getMaterials(), this.options.consolidationMemoryLimit, glRenderer);\n  }\n\n  var modelStats = {\n    category: \"model_load_stats\",\n    is_f2d: false,\n    has_prism: this.viewer3DImpl.matman().hasPrism,\n    load_time: this.loadTime,\n    geometry_size: this.model.getGeometryList().geomMemory,\n    meshes_count: this.svf.metadata.stats.num_geoms,\n    fragments_count: this.svf.metadata.stats.num_fragments,\n    urn: this.svfUrn };\n\n  if (firstPixelTime > 0) {\n    modelStats['first_pixel_time'] = firstPixelTime; // time [ms] from SVF load to first geometry rendered\n  }\n  logger.track(modelStats, true);\n\n  var geomList = this.model.getGeometryList();\n  var dataToTrack = {\n    load_time: this.loadTime,\n    polygons: geomList.geomPolyCount,\n    fragments: this.model.getFragmentList().getCount(),\n    mem_usage: geomList.gpuMeshMemory,\n    time_to_first_pixel: this.firstPixelTimestamp - this.t0 };\n\n  avp.analytics.track('viewer.model.loaded', dataToTrack);\n\n\n\n\n\n  this.currentLoadPath = null;\n\n  this.viewer3DImpl.onLoadComplete(this.model);\n};\n\nOtgLoader.prototype.loadPropertyDb = function () {\n  this.svf.propDbLoader.load();\n};\n\n\nOtgLoader.prototype.is3d = function () {\n  return true;\n};\n\n\nFileLoaderManager.registerFileLoader(\"json\", [\"json\"], OtgLoader);","\nimport { isMobileDevice, getGlobal, isNodeJS } from \"../../compat\";\nimport { BufferGeometryUtils } from \"../../wgs/scene/BufferGeometry\";\nimport { createWorkerWithIntercept } from \"./WorkerCreator\";\nimport { initLoadContext } from \"../net/endpoints\";\nimport { EventDispatcher } from \"../../application/EventDispatcher\";\nimport * as et from \"../../application/EventTypes\";\nimport { getParameterByName } from \"../../globals\";\nimport { OtgPriorityQueue, updateGeomImportance } from \"../lmvtk/otg/OtgPriorityQueue\";\n\nexport var MESH_RECEIVE_EVENT = \"meshReceived\";\nexport var MESH_FAILED_EVENT = \"meshFailed\";\nexport var MATERIAL_RECEIVE_EVENT = \"materialReceived\";\nexport var MATERIAL_FAILED_EVENT = \"materialFailed\";\n\n\nvar disableIndexedDb = getParameterByName(\"disableIndexedDb\").toLowerCase() === \"true\" || getGlobal().DISABLE_INDEXED_DB;\nvar disableWebSocket = getParameterByName(\"disableWebSocket\").toLowerCase() === \"true\" || getGlobal().DISABLE_WEBSOCKET;\n\nfunction initLoadContextGeomCache(msg) {\n  var ctx = initLoadContext(msg);\n  ctx.disableIndexedDb = disableIndexedDb;\n  ctx.disableWebSocket = disableWebSocket;\n  ctx.isInlineWorker = Autodesk.Viewing.Private.ENABLE_INLINE_WORKER;\n  return ctx;\n}\n\n// Helper function used for cache cleanup\nfunction compareGeomsByImportance(geom1, geom2) {\n  return geom1.importance - geom2.importance;\n}\n\n/** Shared cache of BufferGeometries and material JSONs used by different OtgLoaders. */\nexport function OtgResourceCache() {\n\n  // all geometries, indexed by geom hashes\n  var _geoms = new Map();\n  var _mats = new Map();\n\n  // A single geometry may be requested by one or more model loaders.\n  // This map keeps track of requests already in progress so that\n  // we don't issue multiple simultaneously\n  var _hash2Requests = {};\n\n  // worker for geometry loading\n  var NUM_WORKERS = isMobileDevice() ? 2 : 8;\n  var _workers = [];\n\n  for (var i = 0; i < NUM_WORKERS; i++) {\n    _workers.push(createWorkerWithIntercept());\n  }\n\n  this.initialized = true;\n\n  // track memory consumption\n  this.byteSize = 0;\n  this.refCount = 0;\n\n  // A request is called in-progress if we have sent it to the worker and didn't receive a result yet.\n  // We restrict the number of _requestsInProgress. If the limit is reached, all additional requests\n  // are enqueued in _waitingRequests.\n  var _requestsInProgress = 0;\n  var _maxRequestsPerWorker = 100;\n  var _timeout = undefined;\n\n  var _queue = new OtgPriorityQueue();\n\n  var _this = this;\n\n  // mem limits for cache cleanup\n  var MB = 1024 * 1024;\n  var _maxMemory = 100 * MB; // geometry limit at which cleanup is activated\n  var _minCleanup = 50 * MB; // minimum amount of freed memory for a single cleanup run\n\n  var _timeStamp = 0; // used for cache-cleanup to identify which geoms are in use\n\n  // A cleanup will fail if there are no unused geometries anymore.\n  // If this happens, we skip cleanup until the next model unload occurs.\n  var _allGeomsInUse = false;\n\n  function onModelUnloaded() {\n    _allGeomsInUse = false;\n  }\n\n  // Needed for cache-cleanup to check which RenderModels are loaded\n  var _viewers = [];\n\n  this.addViewer = function (viewer) {\n    viewer.addEventListener(et.MODEL_UNLOADED_EVENT, onModelUnloaded);\n    _viewers.push(viewer);\n    _queue.addViewer(viewer);\n  };\n\n  this.removeViewer = function (viewer) {\n    var index = _viewers.indexOf(viewer);\n\n    if (index !== -1) {\n      viewer.removeEventListener(et.MODEL_UNLOADED_EVENT, onModelUnloaded);\n      _queue.removeViewer(viewer);\n      _viewers.splice(index, 1);\n    }\n\n    if (_viewers.length === 0) {\n      this.dtor();\n    }\n  };\n\n  this.dtor = function () {\n    _viewers = [];\n\n    for (var i = 0; i < NUM_WORKERS; i++) {\n      _workers[i].clearAllEventListenerWithIntercept();\n      _workers[i].terminate();\n    }\n\n    this.initialized = false;\n  };\n\n  // function to handle messages from OtgLoadWorker (posted in onGeometryLoaded)\n  function handleMessage(msg) {\n\n    if (!msg.data) {\n      return;\n    }\n\n    //Schedule another spin through the task queue\n    if (_queue.waitingTasks.length && !_timeout) {\n      _timeout = setTimeout(processQueuedItems, 0);\n    }\n\n    if (msg.data.error) {\n      var error = msg.data.error;\n\n      // get hash for which request failed\n      var hash = error.args ? error.args.hash : undefined;\n\n      var type = error.args ? error.args.type : \"g\";\n\n      // inform affected clients.\n      if (hash) {\n        if (type === \"m\") {\n          _mats.set(hash, error); //create an error entry in the cache\n          _this.fireEvent({ type: MATERIAL_FAILED_EVENT, error: error });\n          console.warn(\"Error loading material\", hash);\n        } else {\n          _geoms.set(hash, error); //create an error entry in the cache\n          _this.fireEvent({ type: MESH_FAILED_EVENT, error: error });\n          console.warn(\"Error loading mesh\", hash);\n        }\n\n        delete _hash2Requests[error.hash];\n\n        // track number of requests in progress\n        _requestsInProgress--;\n      }\n\n      return;\n    }\n\n    if (msg.data.material) {\n      var mdata = msg.data;\n      // add material to cache\n      var hash = mdata.hash;\n      var mat = mdata.material;\n      _mats.set(hash, mat);\n\n      // pass geometry to all receiver callbacks\n      _this.fireEvent({ type: MATERIAL_RECEIVE_EVENT, material: mat, hash: hash });\n\n      delete _hash2Requests[mdata.hash];\n\n      _requestsInProgress--;\n\n    } else {\n\n      var meshlist = msg.data;\n      for (var i = 0; i < meshlist.length; i++) {\n\n        var mdata = meshlist[i];\n\n        if (mdata.hash && mdata.mesh) {\n          // convert goemetry data to GeometryBuffer (result is mdata.geometry)\n          BufferGeometryUtils.meshToGeometry(mdata);\n\n          // add geom to cache\n          var hash = mdata.hash;\n          var geom = mdata.geometry;\n          _geoms.set(hash, geom);\n\n          // track summed cache size in bytes\n          _this.byteSize += geom.byteSize;\n\n          // free old unused geoms if necessary\n          _this.cleanup();\n\n          // pass geometry to all receiver callbacks\n          _this.fireEvent({ type: MESH_RECEIVE_EVENT, geom: geom });\n\n          delete _hash2Requests[mdata.hash];\n        }\n\n        // track number of requests in progress\n        _requestsInProgress--;\n      }\n    }\n  }\n\n\n  for (var i = 0; i < NUM_WORKERS; i++) {\n    _workers[i].addEventListenerWithIntercept(handleMessage);\n  }\n\n\n  function assignWorkerForTask(resId) {\n    if (typeof resId === \"number\") {\n      return resId % NUM_WORKERS;\n    }\n\n    return 0 | Math.random() * NUM_WORKERS;\n  }\n\n\n  this.initWorker = function (modelUrn) {\n\n    //Tell each worker which ranges of the geometry pack it's responsible for.\n    for (var i = 0; i < NUM_WORKERS; i++) {\n\n      var msg = {\n        operation: \"INIT_WORKER_OTG\",\n        authorizeUrns: [modelUrn] };\n\n\n      _workers[i].doOperation(initLoadContextGeomCache(msg));\n    }\n  };\n\n  this.updateMruTimestamps = function () {\n\n    //Tell each worker which ranges of the geometry pack it's responsible for.\n    for (var i = 0; i < NUM_WORKERS; i++) {\n\n      var msg = {\n        operation: \"UPDATE_MRU_TIMESTAMPS_OTG\",\n        endSession: _queue.isEmpty() };\n\n\n      _workers[i].doOperation(initLoadContextGeomCache(msg));\n    }\n\n  };\n\n\n  /**  Get a geometry from cache or load it.\n      *    @param {string}   url         - full request url of the geometry/ies resource\n      *    @param {boolean}  isCDN       - whether the URL is pointing to a public edge cache endpoint\n      *    @param {string}   geomHash    - hash key to identify requested geometry/ies\n      *    @param {int} geomIdx          - the geometry ID/index in the model's geometry hash list (optional, pass 0 to skip use of geometry packs)\n      *    @param {string}   queryParams - additional param passed to file query\n      */\n  this.requestGeometry = function (url, isCDN, geomHash, geomIdx, queryParams) {var _this2 = this;\n\n    // if this geometry is in memory, just return it directly\n    var geom = _geoms.get(geomHash);\n    if (geom && geom.args) {\n      //it failed to load previously\n      if (isNodeJS()) {\n        setImmediate(function () {return _this2.fireEvent({ type: MESH_FAILED_EVENT, error: geom, hash: geomHash, repeated: true });});\n      } else {\n        this.fireEvent({ type: MESH_FAILED_EVENT, error: geom, hash: geomHash, repeated: true });\n      }\n      return;\n    } else if (geom) {\n      //it was already cached\n      if (isNodeJS()) {\n        setImmediate(function () {return _this2.fireEvent({ type: MESH_RECEIVE_EVENT, geom: geom });});\n      } else {\n        this.fireEvent({ type: MESH_RECEIVE_EVENT, geom: geom });\n      }\n      return;\n    }\n\n    // if geometry is already loading, just increment\n    // the request counter.\n    var task = _hash2Requests[geomHash];\n    if (task && task.refcount) {\n      task.importanceNeedsUpdate = true;\n      task.refcount++;\n      return;\n    }\n\n    // geom is neither in memory nor loading.\n    // we have to request it.\n    var msg = {\n      operation: \"LOAD_CDN_RESOURCE_OTG\",\n      type: \"g\",\n      url: url,\n      isCDN: isCDN,\n      hash: geomHash,\n      queryParams: queryParams,\n      importance: 0.0,\n      geomIdx: geomIdx,\n      importanceNeedsUpdate: true, // compute actual importance later in updatePriorities\n      refcount: 1 };\n\n\n    _queue.addTask(msg);\n    _hash2Requests[geomHash] = msg;\n\n    if (!_timeout) {\n      _timeout = setTimeout(processQueuedItems, 0);\n    }\n\n  };\n\n\n  this.requestMaterial = function (url, isCDN, matHash, matIdx, queryParams) {var _this3 = this;\n\n    // if this material is in memory, just return it directly\n    var mat = _mats.get(matHash);\n    if (mat && mat.args) {\n      //it failed to load previously\n      setImmediate(function () {return _this3.fireEvent({ type: MATERIAL_FAILED_EVENT, error: mat, hash: matHash, repeated: true });});\n      return;\n    } else if (mat) {\n      //it was already cached\n      setImmediate(function () {return _this3.fireEvent({ type: MATERIAL_RECEIVE_EVENT, material: mat, hash: matHash });});\n      return;\n    }\n\n    // if material is already loading, just increment\n    // the request counter.\n    var task = _hash2Requests[matHash];\n    if (task && task.refcount) {\n      task.refcount++;\n      return;\n    }\n\n    // material is neither in memory nor loading.\n    // we have to request it.\n    var msg = {\n      operation: \"LOAD_CDN_RESOURCE_OTG\",\n      type: \"m\",\n      urls: [url],\n      hashes: [matHash],\n      isCDN: isCDN,\n      queryParams: queryParams,\n      refcount: 1 };\n\n\n    _hash2Requests[matHash] = msg;\n\n    //Material requests are sent to the worker immediately, without going through the\n    //priority queue.\n    var whichWorker = assignWorkerForTask(matIdx);\n    _workers[whichWorker].doOperation(initLoadContextGeomCache(msg));\n    _requestsInProgress++;\n  };\n\n\n  function processQueuedItems() {\n\n    var howManyCanWeDo = _maxRequestsPerWorker * NUM_WORKERS - _requestsInProgress;\n\n    if (howManyCanWeDo === 0) {\n      _timeout = setTimeout(processQueuedItems, 30);\n      return;\n    }\n\n    // recompute importance for each geometry and sort queue by decreasing priority\n    var priorityUpdateFinished = _queue.updateRequestPriorities();\n\n    // Restrict number of simultaneous requests until our priorities are fully updated\n    if (!priorityUpdateFinished) {\n      howManyCanWeDo = Math.min(howManyCanWeDo, 10 * NUM_WORKERS);\n    }\n\n    var msgPerWorker = [];\n    var tasksAdded = 0;\n\n    while (!_queue.isEmpty() && tasksAdded < howManyCanWeDo) {\n\n      var task = _queue.takeTask();\n\n      //Find which worker thread is preferred for the task\n      var whichWorker = assignWorkerForTask(task.geomIdx);\n      var msg = msgPerWorker[whichWorker];\n\n      if (!msg) {\n        msg = {\n          operation: \"LOAD_CDN_RESOURCE_OTG\",\n          type: \"g\",\n          urls: [task.url],\n          hashes: [task.hash],\n          isCDN: task.isCDN,\n          queryParams: task.queryParams };\n\n\n        msgPerWorker[whichWorker] = msg;\n      } else {\n        msg.urls.push(task.url);\n        msg.hashes.push(task.hash);\n      }\n\n      tasksAdded++;\n    }\n\n    for (var i = 0; i < msgPerWorker.length; i++) {\n      var msg = msgPerWorker[i];\n      if (msg) {\n        // send request to worker\n        _workers[i].doOperation(initLoadContextGeomCache(msg));\n        _requestsInProgress += msg.urls.length;\n      }\n    }\n\n    _timeout = undefined;\n  }\n\n  // remove all open requests of this client\n  // input is a map whose keys are geometry hashes\n  this.cancelRequests = function (geomHashMap) {\n\n    for (var hash in geomHashMap) {\n      var task = _hash2Requests[hash];\n\n      if (task)\n      task.refcount--;\n      /*\n                       if (task.refcount === 1) {\n                           delete _hash2Requests[hash];\n                       }*/\n    }\n\n    var hiPrioList = [];\n    for (var i = 0; i < _queue.waitingTasks.length; i++) {\n      var t = _queue.waitingTasks[i];\n      if (_hash2Requests[t.hash].refcount)\n      hiPrioList.push(t);else\n\n      delete _hash2Requests[t.hash];\n    }\n\n    //TODO: perhaps we can leave requests with refcount = 0 in the queue\n    //but sort the queue based on refcount so that those get deprioritized\n    _queue.waitingTasks = hiPrioList;\n\n    // TODO: To make switches faster, we should also inform the worker thread,\n    //       so that it doesn't spend too much time with loading geometries that noone is waiting for.\n  };\n\n  // To prioritize a geometry, we track the bbox surface area of all fragments using it.\n  //\n  // For this, this function must be called for each new loaded fragment.\n  //  @param {RenderModel} model\n  //  @param {number}      fragId\n  this.updateGeomImportance = function (model, fragId) {\n    return updateGeomImportance(model, fragId);\n  };\n\n  this.cleanup = function () {\n\n    var unusedGeoms = [];\n\n    if (this.byteSize < _maxMemory) {\n      return;\n    }\n\n    // get array of models in memory\n    var loadedModels = [];\n\n    for (var i = 0; i < _viewers.length; i++) {\n      var mq = _viewers[i].impl.modelQueue();\n      loadedModels = loadedModels.concat(mq.getModels().concat(_viewers[i].getHiddenModels()));\n    }\n\n    if (_allGeomsInUse) {\n      // On last run, we discovered that we have no unused geometries anymore. As long as no model\n      // is unloaded, we should not retry. Otherwise, we would waste a lot of time for each single new geometry.\n      // Note that this has huge performance impact, because rerunning for each geometry is extremely slow.\n      return;\n    }\n\n    // mark all geometries in-use with latest time-stamp\n    // We consider a geometry as in-use if it is currently loaded by the viewer\n    _timeStamp++;\n    for (var i = 0; i < loadedModels.length; i++) {\n\n      // get geom hashes for this model\n      var model = loadedModels[i];\n      var data = model.getData();\n      if (!model.isOTG()) {\n        // if this is not an Oscar model, it cannot contain shared geoms.\n        // We can skip it.\n        continue;\n      }\n      // For OTG models, we can assume that data is an OtgPackage and contains hashes\n\n      // hasesh may by null for empty models\n      var hashes = data.geomMetadata.hashes;\n      if (!hashes) {\n        continue;\n      }\n\n      // update timestamp for all geoms that are referenced by the hash list (Note that hashes may be null for empty models)\n      var hashCount = hashes.length / data.geomMetadata.byteStride;\n      for (var j = 1; j < hashCount; j++) {// start at 1, because index 0 is reserved value for invalid geomIndex\n\n        // If the geom for this hash is in cache, update its tiemstamp\n        var hash = data.getGeometryHash(j);\n        var geom = _geoms.get(hash);\n        if (geom) {\n          geom.timeStamp = _timeStamp;\n        }\n      }\n    }\n\n    // verify that no geom is leaked in the reused tmp array\n    if (unusedGeoms.length > 0) {\n      console.warn(\"OtgResourceCache.cleanup(): array must be empty\");\n    }\n\n    // Collect all unused geoms, i.e., all geoms that do not have the latest timeStamp\n    for (var hash in _geoms) {\n      var geom = _geoms.get(hash);\n      if (geom.timeStamp !== _timeStamp) {\n        unusedGeoms.push(geom);\n      }\n    }\n\n    // Sort unused geoms by ascending importance\n    unusedGeoms.sort(compareGeomsByImportance);\n\n    // Since cleanup is too expensive to run per geometry,\n    // we always remove a bit more than strictly necessary,\n    // so that we can load some more new geometries before we have to\n    // run cleanup again.\n    var targetMem = _maxMemory - _minCleanup;\n\n    // Remove geoms until we reach mem target\n    var i = 0;\n    for (; i < unusedGeoms.length && this.byteSize >= targetMem; i++) {\n\n      var geom = unusedGeoms[i];\n\n      // remove it from cache\n      delete _geoms.delete(geom.hash);\n\n      // update mem consumption. Note that we run this only for geoms that\n      // are not referenced by any RenderModel in memory, so that removing them\n      // should actually free memory.\n      this.byteSize -= geom.byteSize;\n\n      // Dispose GPU mem.\n      // NOTE: In case we get performance issues in Chrome, try commenting this out\n      // (see hack in GeometryList.dispose)\n      geom.dispose();\n    }\n\n    if (i === unusedGeoms.length) {\n      // No more unused geometries. Any subsequent attempt to cleanup will fail until\n      // the next model unload.\n      _allGeomsInUse = true;\n    }\n\n    // clear reused temp array. Note that it's essential to do this immediately. Otherwise,\n    // the geoms would be leaked until next cleanup.\n    unusedGeoms.length = 0;\n  };\n\n\n  // Wait for specific hashes and push their priority to finish faster.\n  //\n  // Note: This function does not trigger own requests, i.e. can only be used for hashes of models\n  //       that are currently loading.\n  //\n  //  @param {Object} hashMap          - keys specify hashes. All keys with hashMap[key]===true will be loaded. \n  //  @param {function(Object)} onDone - called with hashMap. hashMap[hash] will contain the geometry.\n  this.waitForGeometry = function (hashMap, onDone) {\n\n    // track how many of our geoms are finished\n    var geomsDone = 0;\n    var geomsTodo = _queue.makeUrgent(hashMap);\n\n    // avoid hanging if hashMap is empty\n    if (geomsTodo === 0) {\n      if (hashMap) {\n        onDone(hashMap);\n        return;\n      }\n    }\n\n    processQueuedItems();\n\n    function onGeomDone(hash, geom) {\n      // If a geometry is not loading anymore, its priority has no relevance anymore.\n      // Note that this is generally true - even if we didn't set the priority in this waitForGeometry call. \n      _queue.removeUrgent(hash);\n\n      // Only care for geometries that we need to fill the hashMap values \n      if (!hashMap[hash] === true) {\n        return;\n      }\n\n      hashMap[hash] = geom;\n\n      // check if all done\n      geomsDone++;\n      if (geomsDone < geomsTodo) {\n        return;\n      }\n\n      // cleanup listeners\n      _this.removeEventListener(MESH_RECEIVE_EVENT, onGeomReceived);\n      _this.removeEventListener(MESH_FAILED_EVENT, onGeomFailed);\n\n      onDone(hashMap);\n    }\n\n    function onGeomReceived(event) {onGeomDone(event.geom.hash, event.geom);}\n    function onGeomFailed(event) {onGeomDone(event.error.args.hash, undefined);}\n\n    this.addEventListener(MESH_RECEIVE_EVENT, onGeomReceived);\n    this.addEventListener(MESH_FAILED_EVENT, onGeomFailed);\n\n    // Don't wait forever for any meshes that were already loaded\n    for (var hash in hashMap) {\n      var geom = _geoms.get(hash);\n      if (geom) {\n        onGeomDone(hash, geom);\n      }\n    }\n  };\n\n  this.getGeometry = function (hash) {\n    return _geoms.get(hash);\n  };\n}\n\nEventDispatcher.prototype.apply(OtgResourceCache.prototype);","function ownKeys(object, enumerableOnly) {var keys = Object.keys(object);if (Object.getOwnPropertySymbols) {var symbols = Object.getOwnPropertySymbols(object);if (enumerableOnly) symbols = symbols.filter(function (sym) {return Object.getOwnPropertyDescriptor(object, sym).enumerable;});keys.push.apply(keys, symbols);}return keys;}function _objectSpread(target) {for (var i = 1; i < arguments.length; i++) {var source = arguments[i] != null ? arguments[i] : {};if (i % 2) {ownKeys(Object(source), true).forEach(function (key) {_defineProperty(target, key, source[key]);});} else if (Object.getOwnPropertyDescriptors) {Object.defineProperties(target, Object.getOwnPropertyDescriptors(source));} else {ownKeys(Object(source)).forEach(function (key) {Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key));});}}return target;}function _defineProperty(obj, key, value) {if (key in obj) {Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true });} else {obj[key] = value;}return obj;}import { logger } from '../../logger/Logger';\nimport { ViewingService, pathToURL } from '../net/Xhr';\nimport { ErrorCodes } from '../net/ErrorCodes';\nimport * as et from '../../application/EventTypes';\nimport { initLoadContext } from \"../net/endpoints\";\nimport { InstanceTree } from '../../wgs/scene/InstanceTree';\nimport { InstanceTreeAccess } from '../../wgs/scene/InstanceTreeStorage';\nimport { createWorkerWithIntercept } from './WorkerCreator';\nimport { EventDispatcher } from \"../../application/EventDispatcher\";\n\n\nvar WORKER_GET_PROPERTIES = \"GET_PROPERTIES\";\nvar WORKER_SEARCH_PROPERTIES = \"SEARCH_PROPERTIES\";\nvar WORKER_FIND_PROPERTY = \"FIND_PROPERTY\";\nvar WORKER_FIND_LAYERS = \"FIND_LAYERS\";\nvar WORKER_BUILD_EXTERNAL_ID_MAPPING = \"BUILD_EXTERNAL_ID_MAPPING\";\nvar WORKER_BUILD_LAYER_TO_NODE_ID_MAPPING = \"BUILD_LAYER_TO_NODE_ID_MAPPING\";\nvar WORKER_LOAD_PROPERTYDB = \"LOAD_PROPERTYDB\";\nvar WORKER_UNLOAD_PROPERTYDB = \"UNLOAD_PROPERTYDB\";\nvar WORKER_DIFF_PROPERTIES = \"DIFF_PROPERTIES\";\nvar WORKER_USER_FUNCTION = \"USER_FUNCTION\";\nvar WORKER_LOAD_EXTERNAL_IDS = \"LOAD_EXTERNAL_IDS\";\n\n//Use a global property worker thread, which does caching of\n//shared property databases (and database files).\nvar propWorker;\n\n//Keep track of all pending operations/callbacks going into the property worker\nvar PROPDB_CB_COUNTER = 1;\nvar PROPDB_CALLBACKS = {};\n\nfunction propertyWorkerCallback(e) {\n\n  var data = e.data;\n\n  if (data && data.debug) {\n    logger.debug(data.message);\n    return;\n  }\n\n  // find worker callbacks for this message: [onSuccess, onError, onProgress]\n  var cbs = data && data.cbId && PROPDB_CALLBACKS[data.cbId];\n  if (!cbs) {\n    // Callback for this cbId have been unregistered meanwhile.\n    // This may happen if a PropDbLoader.dtor is called before all messages were processed.\n    // In this case, the message is outdated and we can ignore it.\n    return;\n  }\n\n  // Handle progress callbacks. Unlike success/error event, they may be triggered multiple times for the same operation/cbId.\n  if (data.progress) {\n    if (cbs[2]) {\n      cbs[2](data.progress);\n    }\n\n    // Note that we don't remove the cbId here yet. The cbId of this operation\n    // is cleaned up later when getting the success or error message (see below)\n    return;\n  }\n\n  if (data.error) {\n    if (cbs[1])\n    cbs[1](data.error);\n  } else {\n    if (cbs[0])\n    cbs[0](data.result);\n  }\n\n  // Getting success/error message implies that the current operation/cbId is finished.\n  delete PROPDB_CALLBACKS[data.cbId];\n}\n\nfunction registerWorkerCallback(onSuccess, onError, onProgress) {\n  var cbId = PROPDB_CB_COUNTER++;\n\n  PROPDB_CALLBACKS[cbId] = [onSuccess, onError, onProgress];\n\n  return cbId;\n}\n\nfunction unregisterWorkerCallback(cbId) {\n  delete PROPDB_CALLBACKS[cbId];\n}\n\n//Used by node.js code to get direct access to the worker (which runs on the same thread in node.js)\nexport function getPropWorker() {\n  return propWorker;\n}\n\n//Used by Autodesk.Viewing.shutdown() to shutdown the propdb worker thread\nexport function shutdownPropWorker() {\n  if (propWorker) {\n    propWorker.clearAllEventListenerWithIntercept();\n    propWorker.terminate();\n    propWorker = undefined;\n  }\n}\n\nexport function clearPropertyWorkerCache() {\n  if (!propWorker)\n  return;\n\n  propWorker.doOperation({\n    \"operation\": WORKER_UNLOAD_PROPERTYDB,\n    \"clearCaches\": true });\n\n}\n\n// State enum to manage delay-loading of optional externalID table.\nvar IdLoadState = {\n\n  // Indicates that you have to call loadExternalIds() before using externalIds.\n  NotLoaded: 0,\n\n  // Indicates that externalIds are available. Either because delay-loading of externalIds is not\n  // used or because a prior call to loadExternalIds() succeeded already. Note that this may apply\n  // even if propDB is still loading: propDB operations are automatically delayed until propDB is ready.\n  Available: 1,\n\n  // Indicates that externalIds were requested via loadExternalIds(), but not finished yet.\n  Loading: 2,\n\n  // A prior attempt to load the ids failed.\n  Failed: 3 };\n\n\n/**\n                * Per model property database interface, talks to the worker thread behind the scenes.\n                *\n                * @class\n                * @alias Autodesk.Viewing.Private.PropDbLoader\n                */\nexport var PropDbLoader = function PropDbLoader(sharedDbPath, model, eventTarget) {var _this$model, _this$model$getDocume, _this$model$getDocume2;\n\n  this.eventTarget = eventTarget || new EventDispatcher();\n\n  this.model = model;\n  this.svf = model && model.getData();\n\n  //Will be initialized by the complex logic below.\n  this.dbPath = \"\";\n  this.sharedDbPath = false;\n\n  //If there is a shared db path and there is no\n  //per-SVF specific property database, use the shared one\n  //NOTE: The check for .is2d is significant here: In cases where there\n  //is an OTG v2 property database, we want to use that. Because OTG does not touch F2D files\n  //those might still include the v1 property database in their manifest when we really want to use\n  //the v2 OTG property db.\n  var is2dAndOtg = this.svf && this.svf.is2d && this.svf.loadOptions.bubbleNode && this.svf.loadOptions.bubbleNode.findViewableParent()._getOtgManifest();\n  if (this.svf && !is2dAndOtg && this.svf.propertydb && this.svf.propertydb.avs.length) {\n\n    //If the SVF specified its own property db files, assume they are not shared\n    this.dbFiles = this.svf.propertydb;\n\n    for (var f in this.dbFiles) {\n      if (this.dbFiles[f][0]) {\n        //Revit outputs backslashes in the\n        //relative path in the SVF manifest. WTF?\n        this.dbFiles[f][0].path = this.dbFiles[f][0].path.replace(/\\\\/g, \"/\");\n      }\n    }\n\n    //Now check if the SVF propertydb definition actually refers to the same property database\n    //as the shared database path. This is made harder by various \"../../..\" relative things\n    //in the svf property db files list, hence the nasty path normalization stuff.\n    var svfPath = pathToURL(this.svf.basePath);\n    if (sharedDbPath) {\n\n      var avsPath = ViewingService.simplifyPath(svfPath + this.svf.propertydb.avs[0].path);\n      avsPath = avsPath.slice(0, avsPath.lastIndexOf(\"/\") + 1);\n\n      //Does the property db path specified in the SVF match the\n      //one specified as shared db path in the manifest?\n      if (avsPath === sharedDbPath) {\n\n        //Convert the property db file list to be relative\n        //to the shared property db location, instead of\n        //relative to the SVF location\n\n        var dbFilesNew = {};\n        for (var f in this.dbFiles) {\n          var fileEntry = this.dbFiles[f][0];\n          var fpath = fileEntry.path;\n          fpath = ViewingService.simplifyPath(svfPath + fpath);\n\n          if (fpath.indexOf(sharedDbPath) === 0)\n          fpath = fpath.slice(sharedDbPath.length);\n\n          dbFilesNew[f] = [{ path: fpath, isShared: fileEntry.isShared }];\n        }\n\n        //Replace the loader parameters by the recomputed ones\n        this.dbFiles = dbFilesNew;\n\n        //Use the less specific out of the SVF and shared bubble\n        //paths, and convert all file paths to be relative from that.\n        this.dbPath = sharedDbPath;\n        this.sharedDbPath = true;\n\n      } else {\n        this.dbPath = svfPath;\n        this.sharedDbPath = false;\n      }\n    } else {\n      this.dbPath = svfPath;\n      this.sharedDbPath = false;\n    }\n  } else {\n    this.sharedDbPath = true;\n\n    if (this.svf && this.svf.loadOptions.bubbleNode) {\n      //NOTE: sharedDbPath is only used here as a cache key in the property worker.\n      //Paths returned by the new getPropertyDbManifest API are fully qualified (starting with \"urn:\"\n      this.dbPath = sharedDbPath;\n      var pdbManifest = this.svf.loadOptions.bubbleNode.getPropertyDbManifest();\n      this.dbFiles = pdbManifest.propertydb;\n      this.needsDbIdRemap = pdbManifest.needsDbIdRemap;\n    } else {\n\n      //This fallback lets the worker initialize the file list with defaults\n      //to preserve behavior if bubbleNode is not given in the model.\n      //This code path should be completely removed eventually.\n      logger.warn(\"Deprecated shared property database initialization without bubbleNode in Model load options.\");\n      this.dbPath = sharedDbPath;\n      this.dbFiles = { attrs: [], avs: [], ids: [], values: [], offsets: [] };\n    }\n    logger.log(\"Using shared db path \" + sharedDbPath);\n  }\n\n  this.queryParams = \"\";\n  var acmSessionId = (_this$model = this.model) === null || _this$model === void 0 ? void 0 : (_this$model$getDocume = _this$model.getDocumentNode()) === null || _this$model$getDocume === void 0 ? void 0 : (_this$model$getDocume2 = _this$model$getDocume.getDocument()) === null || _this$model$getDocume2 === void 0 ? void 0 : _this$model$getDocume2.getAcmSessionId(this.dbPath);\n  acmSessionId = acmSessionId || this.svf.acmSessionId;\n  if (this.svf && acmSessionId) {\n    this.queryParams = \"acmsession=\" + acmSessionId;\n  }\n\n  this.loadProgress = 0;\n\n  // Worker callback ID for worker messages during loading.\n  this.cbId = undefined;\n\n  // Manage state for optional externalID table.\n  this.idLoadState = IdLoadState.NotLoaded;\n  this.waitingForExternalIds = []; // Pending {resolve, reject} to be notified when externalId load finished.\n};\n\nPropDbLoader.prototype.dtor = function () {\n  this.asyncPropertyOperation(\n  {\n    \"operation\": WORKER_UNLOAD_PROPERTYDB },\n\n  function () {}, function () {});\n\n\n  // If loading is in progress, make sure that no callbacks are triggered anymore\n  var loadStarted = Boolean(this.cbId);\n  var loadEnded = this.instanceTree || this.propertyDbError;\n  if (loadStarted && !loadEnded) {\n\n    // Disconnect worker callbacks for success, failure, and progress messages\n    unregisterWorkerCallback(this.cbId);\n\n    // Some code outside may be waiting for getObjectTree() to fail or succeed.\n    // Since we disconnected the worker callbacks, no events will be dispatached anymore.\n    // So, we dispatch one right now to avoid getObjectTree() from hanging forever.\n\n    // Note that this.propertyDBError is used by getObjectTree() to distinguish between \n    // success and failure. So, we have to set it before triggering the event.\n    this.propertyDbError = {\n      // Indicates that propDb was unloaded while waiting for getObjectTree()\n      propDbWasUnloaded: true };\n\n\n    this.eventTarget.dispatchEvent({\n      type: et.OBJECT_TREE_UNAVAILABLE_EVENT,\n      svf: this.svf,\n      model: this.model,\n      target: this });\n\n  }\n\n  this.model = null;\n  this.svf = null;\n};\n\n\nPropDbLoader.prototype.processLoadResult = function (result) {\n  var scope = this;\n\n  if (result.instanceTreeStorage) {\n\n    var nodeAccess = new InstanceTreeAccess(result.instanceTreeStorage, result.rootId, result.instanceBoxes);\n\n    scope.instanceTree = new InstanceTree(nodeAccess, result.objectCount, result.maxTreeDepth);\n\n    if (scope.svf) {\n      //For backwards compatibility, svf.instanceTree has to be set also\n      scope.svf.instanceTree = scope.instanceTree;\n\n      // If nodeBoxes are not precomputed, we set the fragBoxes, so that instanceTree can compute nodeBoxes on-the-fly\n      scope.instanceTree.setFragmentList(scope.model.getFragmentList());\n    }\n  }\n\n  if (result.objectCount) {\n\n    //Case where there is no object tree, but objects\n    //do still have properties. This is the case for F2D drawings or when\n    //the caller explicitly skipped instanceTree derivation.\n    scope.hasObjectProperties = result.objectCount;\n\n    if (scope.svf) {\n      scope.svf.hasObjectProperties = result.objectCount;\n    }\n  }\n\n  if (result.dbidOldToNew) {\n    this.model.setDbIdRemap(result.dbidOldToNew);\n  }\n\n  scope.onLoadProgress(100);\n\n  scope.eventTarget.dispatchEvent({\n    type: et.OBJECT_TREE_CREATED_EVENT,\n    svf: scope.svf,\n    model: scope.model,\n    target: scope });\n\n\n};\n\nPropDbLoader.prototype.processLoadError = function (error) {\n\n  var scope = this;\n\n  scope.propertyDbError = error;\n\n  scope.onLoadProgress(100);\n\n  scope.eventTarget.dispatchEvent({\n    type: et.OBJECT_TREE_UNAVAILABLE_EVENT,\n    svf: scope.svf,\n    model: scope.model,\n    target: scope });\n\n};\n\n/**\n    * Kicks off property database load\n    * @param options.skipInstanceTreeResult - If set, the loader will skip the step that generates InstanceTreeStorage for use by model tree. Used in server side processing.\n    */\nPropDbLoader.prototype.load = function (options) {\n\n  var scope = this;\n  options = options || {};\n\n  //In the case of glTF, the instance tree is immediately available, loaded\n  //together with the geometry payload (\"the svf\")\n  if (this.svf && this.svf.instanceTree && this.svf.instanceBoxes) {\n    //Need this call to be async, because some state required\n    //by object tree load event handlers is not yet initialized\n    //when the PropDbLoader.load() is called (in particular, viewer.model is not assigned at that point)\n    setTimeout(function () {scope.processLoadResult(scope.svf);}, 0);\n    return;\n  }\n\n  //Create the shared property worker if not already done\n  if (!propWorker) {\n    propWorker = createWorkerWithIntercept(true);\n    propWorker.addEventListenerWithIntercept(propertyWorkerCallback);\n  }\n\n  var onObjectTreeRead = function onObjectTreeRead(result) {\n    scope.processLoadResult(result);\n  };\n\n  var onObjectTreeError = function onObjectTreeError(error) {\n    scope.processLoadError(error);\n  };\n\n  var onObjectTreeProgress = function onObjectTreeProgress(progress) {\n    scope.onLoadProgress(progress.percent);\n  };\n\n  this.cbId = registerWorkerCallback(onObjectTreeRead, onObjectTreeError, onObjectTreeProgress);\n\n  // Precomputed bboxes are only needed when using the model explode feature. If this is not used, we can save some memory and compute boxes on-the-fly instead.\n  var loadOptions = this.svf && this.svf.loadOptions;\n  var precomputeNodeBoxes = !(loadOptions && loadOptions.disablePrecomputedNodeBoxes);\n  var skipExternalIds = !!(loadOptions && loadOptions.skipExternalIds);\n\n  // When not using delay-loading, ids are always available. Note that prop operations do always wait\n  // until propDB is loaded. So, we can already assume here that prop operations will get the ids.\n  if (!skipExternalIds) {\n    this.idLoadState = IdLoadState.Available;\n  }\n\n  var xfer = _objectSpread({ operation: WORKER_LOAD_PROPERTYDB,\n    dbPath: this.dbPath,\n    sharedDbPath: this.sharedDbPath,\n    propertydb: this.dbFiles,\n    fragToDbId: this.svf && this.svf.fragments.fragId2dbId, //the 1:1 mapping of fragment to dbId we got from the SVF or the 1:many we built on the fly for f2d\n    fragBoxes: precomputeNodeBoxes && this.svf && this.svf.fragments.boxes, //needed to precompute bounding box hierarchy for explode function (and possibly others)\n    needsDbIdRemap: this.needsDbIdRemap,\n    cbId: this.cbId,\n    queryParams: this.queryParams,\n    skipExternalIds: skipExternalIds },\n  options);\n\n\n  propWorker.doOperation(initLoadContext(xfer)); // Send data to our worker.\n\n};\n\n\nPropDbLoader.prototype.asyncPropertyOperation = function (opArgs, success, fail, progress) {\n\n  var scope = this;\n\n  //Identify which property database we want to work on (the worker can hold multiple property databases)\n  opArgs.dbPath = this.dbPath;\n\n  if (scope.instanceTree || scope.hasObjectProperties) {\n\n    opArgs.cbId = registerWorkerCallback(success, fail, progress);\n\n    propWorker.doOperation(opArgs); // Send data to our worker.\n  } else if (scope.propertyDbError) {\n    if (fail)\n    fail(scope.propertyDbError);\n  } else {\n    var onEvent = function onEvent(e) {\n      scope.eventTarget.removeEventListener(et.OBJECT_TREE_CREATED_EVENT, onEvent);\n      scope.eventTarget.removeEventListener(et.OBJECT_TREE_UNAVAILABLE_EVENT, onEvent);\n      if (scope.instanceTree || scope.hasObjectProperties || scope.propertyDbError)\n      scope.asyncPropertyOperation(opArgs, success, fail, progress);else\n      if (fail)\n      fail({ code: ErrorCodes.UNKNOWN_FAILURE, msg: \"Failed to load properties\" }); //avoid infinite recursion.\n    };\n    scope.eventTarget.addEventListener(et.OBJECT_TREE_CREATED_EVENT, onEvent);\n    scope.eventTarget.addEventListener(et.OBJECT_TREE_UNAVAILABLE_EVENT, onEvent);\n  }\n};\n\n\n/**\n    * Gets the properties for an ID.\n    * \n    * @deprecated Use getProperties2 instead. This avoids the need to load the externalID table unless explicitly needed.\n    *             This variant always enforces loading when doing queries with empty filter.\n    * \n    * @param {number} dbid - The database identifier.\n    * @param {Callbacks#onPropertiesSuccess} [onSuccess] - Callback for when the properties are fetched.\n    * @param {Callbacks#onGenericError} [onError] - Callback for when the properties are not found or another error occurs.\n    *\n    * @alias Autodesk.Viewing.Private.PropDbLoader#getProperties\n    */\nPropDbLoader.prototype.getProperties = function (dbId, onSuccess, onError) {\n\n  if (this.idLoadState === IdLoadState.NotLoaded) {\n    logger.warn('Calling getProperties() will cause loading of the potentially large externalIDs file. Use getProperties2() to avoid this warning.');\n  }\n  this.getProperties2(dbId, onSuccess, onError, { needsExternalId: true });\n};\n\n/**\n    * Gets the properties for an ID. New version of getProperties() that avoids loading of externalId table unless really needed.\n    * \n    * @param {number} dbid - The database identifier.\n    * @param {Callbacks#onPropertiesSuccess} [onSuccess] - Callback for when the properties are fetched.\n    * @param {Callbacks#onGenericError} [onError] - Callback for when the properties are not found or another error occurs.\n    * @param {Object} [options]\n    * @param {bool} [options.needsExternalId] - If true, we enforce loading of externalIDs if necessary. ExternalIds may significantly \n    *                                           increase memory consumption and should only be loaded if unavoidable.\n    *\n    * @alias Autodesk.Viewing.Private.PropDbLoader#getProperties2\n    */\nPropDbLoader.prototype.getProperties2 = function (dbId, onSuccess, onError, options) {var _this = this;\n\n  var doGetProps = function doGetProps() {\n    _this.asyncPropertyOperation(\n    {\n      \"operation\": WORKER_GET_PROPERTIES,\n      \"dbId\": dbId },\n\n    onSuccess, onError);\n\n  };\n\n  // Load externalIDs if necessary\n  if (options && options.needsExternalId) {\n    this.loadExternalIds().\n    then(doGetProps).\n    catch(onError);\n  } else {\n    doGetProps();\n  }\n};\n\n/**\n    * Bulk property retrieval with property name filter.\n    * \n    * @deprecated use getBulkProperties2 instead - which makes sure that externalId table is only loaded if really needed.\n    * \n    * @param {number[]} dbIds - array of object dbIds to return properties for.\n    * @param {object} [propFilter] - array of property names to retrieve values for. If empty, all properties are returned.\n    * @param {function} onSuccess - Callback function for when results are ready.\n    * @param {function} onError - Callback function for when something went wrong.\n    * @param {boolean} [ignoreHidden=false] - true to ignore hidden properties.\n    *\n    * @alias Autodesk.Viewing.Private.PropDbLoader#getBulkProperties\n    */\nPropDbLoader.prototype.getBulkProperties = function (dbIds, propFilter, onSuccess, onError, ignoreHidden) {\n\n  var options = {\n    ignoreHidden: ignoreHidden,\n    propFilter: propFilter,\n    needsExternalId: !propFilter || propFilter.includes(\"externalId\") // Include externalID for empty filters or if explicitly requested\n  };\n\n  if (options.needsExternalId && this.idLoadState === IdLoadState.NotLoaded) {\n    logger.warn('Calling getProperties() will cause loading of the potentially large externalIDs file. Use getProperties2() to avoid this warning.');\n  }\n\n  this.getBulkProperties2(dbIds, options, onSuccess, onError);\n};\n\n/**\n    * Bulk property retrieval with property name filter.\n    * \n    * @param {number[]} dbIds - array of object dbIds to return properties for.\n    * @param {function} onSuccess - Callback function for when results are ready.\n    * @param {function} onError - Callback function for when something went wrong.\n    * @param {Object}   [options]\n    * @param {string[]} [options.propFilter] - array of property names to retrieve values for. If empty, all properties are returned.\n    * @param {boolean}  [options.ignoreHidden=false] - true to ignore hidden properties.\n    * @param {boolean}  [options.needsExternalId] - If true, it is ensured that externalId table is loaded before doing the property query.\n    *\n    * @alias Autodesk.Viewing.Private.PropDbLoader#getBulkProperties2\n    */\nPropDbLoader.prototype.getBulkProperties2 = function (dbIds, options, onSuccess, onError) {var _this2 = this;\n\n  options = options || {};\n\n  var doGetProps = function doGetProps() {\n    _this2.asyncPropertyOperation(\n    {\n      \"operation\": WORKER_GET_PROPERTIES,\n      \"dbIds\": dbIds,\n      \"propFilter\": options.propFilter,\n      \"ignoreHidden\": options.ignoreHidden },\n\n    onSuccess, onError);\n\n  };\n\n  // Load externalIDs if necessary\n  if (options && options.needsExternalId) {\n    this.loadExternalIds().\n    then(doGetProps).\n    catch(onError);\n  } else {\n    doGetProps();\n  }\n};\n\n\nPropDbLoader.prototype.searchProperties = function (searchText, attributeNames, onSuccess, onError, options) {\n\n  this.asyncPropertyOperation(\n  {\n    \"operation\": WORKER_SEARCH_PROPERTIES,\n    \"searchText\": searchText,\n    \"attributeNames\": attributeNames,\n    \"searchOptions\": options },\n\n  onSuccess, onError);\n\n};\n\nPropDbLoader.prototype.findProperty = function (propertyName) {\n\n  var that = this;\n  return new Promise(function (resolve, reject) {\n    that.asyncPropertyOperation(\n    {\n      \"operation\": WORKER_FIND_PROPERTY,\n      \"propertyName\": propertyName },\n\n    resolve, reject);\n\n  });\n};\n\n/*\n    * Compares this db with another one. The result object passed to onSuccess\n    * is an object that contains...\n    * {\n    *    // An array of all dbIds that...\n    *    // a) exist in both databases\n    *    // b) have different properties.\n    *    changedIds: dbId[]\n    *\n    *    // Optional: details about what changed exactly.\n    *    // If k props changed for a dbId result.changeIds[i], result.propChanges[i]\n    *    // is an array of length k. Each element in it describes the change of a single\n    *    // property.\n    *    propChanges: Object[][]\n    * }\n    *\n    *  @param {PropDbLoader} dbToDiff\n    *  @param {function(number[])} onSuccess     - receives the array of dbIds\n    *  @param {Object}             [DiffOptions] - Optional diff options object.\n    *  @param {function(number)}   onProgress    - Optional callback receiving percent values\n    *\n    * DiffOptions:\n    *   @param {number[]} diffOps.dbIds             - Restrict diff to fixed set of dbIds (otherwise all ids)\n    *   @param {bool}     diffOps.listPropChanges   - If true, result.propChanges is provided (slower)\n    *\n    * @private\n    */\nPropDbLoader.prototype.diffProperties = function (dbToDiff, onSuccess, onError, diffOptions, onProgress) {\n  this.asyncPropertyOperation(\n  {\n    \"operation\": WORKER_DIFF_PROPERTIES,\n    \"dbPath2\": dbToDiff, // only pass the second dbPath here. this.dbPath is automatically set (see asyncPropertyOperation)\n    \"diffOptions\": diffOptions },\n\n  onSuccess, onError, onProgress);\n\n};\n\nPropDbLoader.prototype.findLayers = function () {\n\n  var that = this;\n  return new Promise(function (resolve, reject) {\n    that.asyncPropertyOperation(\n    {\n      \"operation\": WORKER_FIND_LAYERS },\n\n    resolve, reject);\n\n  });\n};\n\n// @param {Object} [extIdFilter] - optional: restricts result to all extIds for which extIdFilter[extId] is true.\nPropDbLoader.prototype.getExternalIdMapping = function (onSuccess, onError, extIdFilter) {var _this3 = this;\n\n  var doQuery = function doQuery() {\n    _this3.asyncPropertyOperation(\n    {\n      \"operation\": WORKER_BUILD_EXTERNAL_ID_MAPPING,\n      \"extIdFilter\": extIdFilter },\n\n    onSuccess, onError);\n\n  };\n  return this.loadExternalIds().then(doQuery);\n};\n\nPropDbLoader.prototype.getLayerToNodeIdMapping = function (onSuccess, onError) {\n\n  this.asyncPropertyOperation(\n  {\n    \"operation\": WORKER_BUILD_LAYER_TO_NODE_ID_MAPPING },\n\n  onSuccess, onError);\n\n};\n\n/**\n    * Allows executing user supplied function code on the worker thread against the \n    * {@link PropertyDatabase} instance. The returned value from the supplied function will\n    * be used to resolve the returned Promise. The function must be named `userFunction`.\n    *\n    * @example\n    *     function userFunction(pdb, userData) {\n    *          var dbId = 1;\n    *          pdb.enumObjectProperties(dbId, function(propId, valueId) { \n    *                // do stuff\n    *          });\n    *          return 42 * userData; // userData will be 2 in this example\n    *     }\n    *     executeUserFunction(userFunction, 2).then(function(result) {\n    *          console.log(result); // result === 84 === 42 * 2\n    *     })\n    *\n    * @param {function|string} code - Function takes 1 argument, the {@link PropertyDatabase} instance.\n    * @param {*} userData - A value that will get passed to the `code` function when run in the property \n    *                       worker context. it needs to be serializable.\n    * \n    * @returns {Promise} - Resolves with the return value of user function.\n    *\n    * @alias Autodesk.Viewing.Private.PropDbLoader#executeUserFunction\n    */\nPropDbLoader.prototype.executeUserFunction = function (code, userData) {var _this4 = this;\n  if (typeof code === \"function\") {\n    code = code.toString();\n  } else if (typeof code !== \"string\") {\n    return Promise.reject(\"Expected Function or string.\");\n  }\n\n  var blob;\n  try {\n    blob = new Blob([code], { type: 'application/javascript' });\n  } catch (e) {\n    // Backward compatibility.\n    var builder = new BlobBuilder();\n    builder.append(code);\n    blob = builder.getBlob();\n  }\n  var blobUrl = URL.createObjectURL(blob);\n\n  return new Promise(function (resolve, reject) {\n    _this4.asyncPropertyOperation(\n    {\n      \"operation\": WORKER_USER_FUNCTION,\n      \"userFunction\": blobUrl,\n      \"userData\": userData },\n\n    resolve, reject);\n\n  });\n};\n\nPropDbLoader.prototype.isObjectTreeLoaded = function () {\n  return !!this.instanceTree;\n};\n\n\nPropDbLoader.prototype.getObjectTree = function (onSuccess, onError) {\n  var scope = this;\n\n  if (scope.instanceTree) {\n    onSuccess(scope.instanceTree);\n  } else if (scope.propertyDbError) {\n    if (onError)\n    onError(scope.propertyDbError);\n  } else if ('hasObjectProperties' in scope) {\n    if (scope.svf && scope.svf.is2d && onError)\n    onError('F2D files do not have an InstanceTree.');else\n\n    onSuccess(null); //loaded property database, but instance tree is empty or not initialized\n  } else {\n    // Property Db has been requested; waiting for worker to complete //\n    var listener = function listener() {\n      scope.eventTarget.removeEventListener(et.OBJECT_TREE_CREATED_EVENT, listener);\n      scope.eventTarget.removeEventListener(et.OBJECT_TREE_UNAVAILABLE_EVENT, listener);\n      scope.getObjectTree(onSuccess, onError);\n    };\n    scope.eventTarget.addEventListener(et.OBJECT_TREE_CREATED_EVENT, listener);\n    scope.eventTarget.addEventListener(et.OBJECT_TREE_UNAVAILABLE_EVENT, listener);\n  }\n};\n\nPropDbLoader.prototype.onLoadProgress = function (percent) {\n  this.eventTarget.dispatchEvent({\n    type: et.OBJECT_TREE_LOAD_PROGRESS_EVENT,\n    percent: percent,\n    svf: this.svf,\n    model: this.model,\n    target: this });\n\n  this.loadProgress = percent;\n};\n\n/**\n    * Estimated load progress in percent.\n    *\n    * @returns {number} in the range 0..100\n    *\n    * @alias Autodesk.Viewing.Private.PropDbLoader#getLoadProgress\n    */\nPropDbLoader.prototype.getLoadProgress = function () {return this.loadProgress;};\n\n\n/**\n                                                                                   * Returns true if loading is finished (either with success or with error)\n                                                                                   *\n                                                                                   * @returns {boolean}\n                                                                                   *\n                                                                                   * @alias Autodesk.Viewing.Private.PropDbLoader#isLoadDone\n                                                                                   */\nPropDbLoader.prototype.isLoadDone = function () {return this.loadProgress == 100;};\n\n// If externalIds were initially skipped using the .skipExternalIds option, this \n// function allows for loading them later on demand.\n//  @returns {Promise} If resolved, we are ready obtain externalIds from the propDB worker.\n//                     It might be rejected if loading failed or propDB was unloaded while waiting.\nPropDbLoader.prototype.loadExternalIds = function () {var _this5 = this;\n\n  switch (this.idLoadState) {\n\n    // If ids are already there, we are done.\n    case IdLoadState.Available:return Promise.resolve();\n\n    // If we tried to load the ids earlier and failed, we are done as well - just with less success.\n    case IdLoadState.Failed:return Promise.reject();\n\n    // If this is the first request for the id-file, send request to worker\n    case IdLoadState.NotLoaded:{\n\n        // Avoid to do it again on next call\n        this.idLoadState = IdLoadState.Loading;\n\n        // On success, notify everyone that ids are ready\n        var onSuccess = function onSuccess() {\n          _this5.idLoadState = IdLoadState.Available;\n          _this5.waitingForExternalIds.forEach(function (p) {return p.resolve();});\n        };\n\n        // On failure, notify everyone that it doesn't make sense to wait anymore\n        var onError = function onError() {\n          _this5.idLoadState = IdLoadState.Failed;\n          _this5.waitingForExternalIds.forEach(function (p) {return p.reject();});\n        };\n\n        var options = {\n          operation: WORKER_LOAD_EXTERNAL_IDS,\n          // Note that values in this.dbFiles are not strings, but 1-element arrays of those.\n          idsFile: this.dbFiles.ids[0],\n          queryParams: this.queryParams };\n\n\n        // Configure endpoint, credentials etc.\n        initLoadContext(options);\n\n        // Setup worker request to load ids file. Note that using asyncPropertyOperation makes sure\n        // that this request is delayed until the other propDb files are available.\n        this.asyncPropertyOperation(options, onSuccess, onError);\n        break;\n      }}\n  ;\n\n  // If we get here, the request for id loading must be in progress => resolve/reject later\n  return new Promise(function (resolve, reject) {\n    _this5.waitingForExternalIds.push({ resolve: resolve, reject: reject });\n  });\n};","function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {try {var info = gen[key](arg);var value = info.value;} catch (error) {reject(error);return;}if (info.done) {resolve(value);} else {Promise.resolve(value).then(_next, _throw);}}function _asyncToGenerator(fn) {return function () {var self = this,args = arguments;return new Promise(function (resolve, reject) {var gen = fn.apply(self, args);function _next(value) {asyncGeneratorStep(gen, resolve, reject, _next, _throw, \"next\", value);}function _throw(err) {asyncGeneratorStep(gen, resolve, reject, _next, _throw, \"throw\", err);}_next(undefined);});};}import { isNodeJS, isMobileDevice } from \"../../compat\";\nimport { logger } from \"../../logger/Logger\";\nimport { LmvMatrix4 } from \"../../wgs/scene/LmvMatrix4\";\nimport { ErrorCodes, errorCodeString } from \"../net/ErrorCodes\";\nimport { BVHBuilder, NodeArray } from \"../../wgs/scene/BVHBuilder\";\nimport { MeshFlags } from '../../wgs/scene/MeshFlags';\nimport { BufferGeometryUtils } from \"../../wgs/scene/BufferGeometry\";\nimport { MaterialConverter } from \"../../wgs/render/MaterialConverter\";\nimport { pathToURL } from \"../net/Xhr\";\nimport { PropDbLoader } from \"./PropDbLoader\";\nimport { TextureLoader } from \"./TextureLoader\";\nimport { initWorkerScript, createWorkerWithIntercept } from \"./WorkerCreator\";\nimport * as et from \"../../application/EventTypes\";\nimport { Model } from \"../../application/Model\";\nimport * as THREE from \"three\";\n\nimport { FileLoaderManager } from \"../../application/FileLoaderManager\";\nimport { initLoadContext } from \"../net/endpoints\";\nimport { ProgressState } from '../../application/ProgressState';\n\nvar av = Autodesk.Viewing;\nvar avp = av.Private;\n\nvar NUM_WORKER_THREADS = isNodeJS() ? 10 : isMobileDevice() ? 2 : 6;\nvar WORKER_LOAD_GEOMETRY = \"LOAD_GEOMETRY\";\nvar WORKER_LOAD_SVF = \"LOAD_SVF\";\nvar WORKER_LOAD_SVF_CONTD = \"LOAD_SVF_CONTD\";\nvar WORKER_FETCH_TOPOLOGY = \"FETCH_TOPOLOGY\";\n\n\n/** @constructor */\nexport var SvfLoader = function SvfLoader(parent) {\n  this.viewer3DImpl = parent;\n  this.next_pack = 0;\n  this.loading = false;\n  this.loadedPacksCount = 0;\n  this.tmpMatrix = new THREE.Matrix4();\n  this.tmpBox = new THREE.Box3();\n  this.fetchingTopology = false;\n  this.loadTime = 0;\n  this.notifiesFirstPixel = true;\n};\n\nSvfLoader.prototype.dtor = function () {\n  // Cancel all potential process on loading a file.\n\n  // 1. init worker script can be cancelled.\n  //\n  if (this.initWorkerScriptToken) {\n    this.initWorkerScriptToken.cancel();\n    this.initWorkerScriptToken = null;\n    logger.debug(\"SVF loader dtor: on init worker script.\");\n  }\n\n  // 2. load model root (aka. svf) can be cancelled.\n  //\n  if (this.svfWorker) {\n    this.svfWorker.clearAllEventListenerWithIntercept();\n    this.svfWorker.terminate();\n    this.svfWorker = null;\n    logger.debug(\"SVF loader dtor: on svf worker.\");\n  }\n\n  // 3. load geometry pack files can be cancelled.\n  //\n  if (this.pack_workers) {\n    for (var i = 0; i < this.pack_workers.length; i++) {\n      this.pack_workers[i].clearAllEventListenerWithIntercept();\n      this.pack_workers[i].terminate();\n    }\n    this.pack_workers = null;\n    logger.debug(\"SVF loader dtor: on geom worker.\");\n  }\n\n  // 4. load property can be cancelled.\n  //\n  if (this.svf && this.svf.propDbLoader) {\n    this.svf.propDbLoader.dtor();\n    this.svf.propDbLoader = null;\n  }\n\n  // and clear metadata.\n  this.tmpMatrix = null;\n  this.tmpBox = null;\n\n  this.svf = null;\n  this.model = null;\n  this.next_pack = 0;\n  this.loading = false;\n  this.loadedPacksCount = 0;\n  this.loadTime = 0;\n  this.viewer3DImpl = null;\n};\n\n// methods added so SvfLoaderML can use override and use other SvfLoader methods\n// These are called from SvfLoader methods\n\n// initialize the worker script\nSvfLoader.prototype.initWorkerScript = initWorkerScript;\n\n// Create a worker.\nSvfLoader.prototype.createWorkerWithIntercept = createWorkerWithIntercept;\n\n// Start loading the packfiles with the workers\nSvfLoader.prototype.startWorkers = function () {var _this = this;\n  var svf = this.svf;\n  var count = Math.min(svf.geompacks.length, av.NUM_WORKER_THREADS || NUM_WORKER_THREADS);\n  for (var i = 0; i < count; i++) {\n    var pf = svf.geompacks[this.next_pack++];\n    pf.loading = true;\n    if (isNodeJS()) {\n      this.loadGeometryPack(pf.id, pf.uri);\n    } else {\n      (function (pf) {\n        setTimeout(function () {_this.loadGeometryPack(pf.id, pf.uri);}, i * 200);\n      })(pf);\n    }\n  }\n};\n\n// create and initialize the model\nSvfLoader.prototype.createModel = function (svf) {\n  var model = this.model = new Model(svf);\n  model.loader = this;\n\n  model.initialize();\n  return model;\n};\n\n// End SvfLoaderML specific methods\n\nSvfLoader.prototype.isValid = function () {\n  return this.viewer3DImpl;\n};\n\n\nSvfLoader.prototype.loadFile = function (path, options, onDone, onWorkerStart) {\n\n  if (!this.viewer3DImpl) {\n    logger.log(\"SVF loader was already destructed. So no longer usable.\");\n    return false;\n  }\n\n  if (this.loading) {\n    logger.log(\"Loading of SVF already in progress. Ignoring new request.\");\n    return false;\n  }\n\n  // Mark it as loading now.\n  this.loading = true;\n\n  var index = path.indexOf('urn:');\n  if (index != -1) {\n    // Extract urn:adsk.viewing:foo.bar.whateverjunks out of the path URL and bind it to logger.\n    // From now on, we can send logs to viewing service, and logs are grouped by urn to make Splunk work.\n    path = decodeURIComponent(path);\n    var urn = path.substr(index, path.substr(index).indexOf('/'));\n    logger.log(\"Extracted URN: \" + urn);\n\n    // Extract urn(just base64 code)\n    var _index = urn.lastIndexOf(':');\n    this.svfUrn = urn.substr(_index + 1);\n  } else {\n    this.svfUrn = path;\n  }\n\n  this.sharedDbPath = options.sharedPropertyDbPath;\n\n  this.currentLoadPath = path;\n  var lastSlash = this.currentLoadPath.lastIndexOf(\"/\");\n  if (lastSlash != -1)\n  this.basePath = this.currentLoadPath.substr(0, lastSlash + 1);\n\n  this.acmSessionId = options.acmSessionId;\n\n  this.queryParams = \"\";\n  if (this.acmSessionId) {\n    this.queryParams = \"acmsession=\" + this.acmSessionId;\n  }\n\n  this.options = options;\n\n  var scope = this;\n  this.initWorkerScriptToken = this.initWorkerScript(function () {\n    scope.loadSvfCB(path, options, onDone, onWorkerStart);\n  });\n\n  return true;\n};\n\nSvfLoader.prototype.loadSvfCB = function (path, options, onDone, onWorkerStart) {\n  this.t0 = new Date().getTime();\n  this.firstPixelTimestamp = null;\n  this.failedToLoadSomeGeometryPacks = null;\n  this.failedToLoadPacksCount = 0;\n  var first = true;\n\n  var scope = this;\n  var msg = {\n    url: pathToURL(path),\n    basePath: this.currentLoadPath,\n    objectIds: options.ids,\n    globalOffset: options.globalOffset,\n    fragmentTransformsDouble: options.fragmentTransformsDouble,\n    placementTransform: options.placementTransform,\n    applyRefPoint: options.applyRefPoint,\n    queryParams: this.queryParams,\n    bvhOptions: options.bvhOptions || { isWeakDevice: isMobileDevice() },\n    applyScaling: options.applyScaling,\n    applyPlacementInModelUnits: options.applyPlacementInModelUnits,\n    loadInstanceTree: options.loadInstanceTree };\n\n\n  this.viewer3DImpl._signalNoMeshes();\n\n  var w = this.svfWorker = this.createWorkerWithIntercept();\n\n  var onSVFLoad = /*#__PURE__*/function () {var _ref = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee(ew) {var cleaner, svf, isGltf;return regeneratorRuntime.wrap(function _callee$(_context) {while (1) {switch (_context.prev = _context.next) {case 0:\n              cleaner = function cleaner() {\n                w.clearAllEventListenerWithIntercept();\n                w.terminate();\n                scope.svfWorker = null;\n                w = null;\n              };\n\n              if (first && onWorkerStart) {\n                first = false;\n                onWorkerStart();\n              }if (!(\n\n              ew.data && ew.data.manifest)) {_context.next = 9;break;}\n\n              scope.interceptManifest(ew.data.manifest);\n              msg.operation = WORKER_LOAD_SVF_CONTD;\n              msg.manifest = ew.data.manifest;\n              w.doOperation(msg);_context.next = 26;break;case 9:if (!(\n              ew.data && ew.data.svf)) {_context.next = 25;break;}\n              //Decompression is done.\n              svf = scope.svf = ew.data.svf;\n\n              if (scope.failedToLoadSomeGeometryPacks) {\n                // Report a warning. It is not a fatal error.\n                if (onDone) {\n                  onDone(scope.failedToLoadSomeGeometryPacks);\n                }\n                scope.failedToLoadSomeGeometryPacks = null;\n              }_context.next = 14;return (\n\n                scope.onModelRootLoadDone(svf));case 14:\n\n              if (onDone) {\n                onDone(null, scope.model);\n              }\n\n              scope.viewer3DImpl.api.dispatchEvent({ type: et.MODEL_ROOT_LOADED_EVENT, svf: svf, model: scope.model });\n\n              svf.loadDone = false;\n\n              isGltf = false;\n              if (svf.metadata && svf.metadata.gltf) {\n                isGltf = true;\n              }\n\n              if (!isGltf) {\n                if (svf.geompacks.length == 0) {\n                  scope.onGeomLoadDone();\n                } else\n                {\n                  scope.startWorkers();\n                }\n              }\n\n              if (ew.data.progress == 1) {\n                scope.loading = false;\n                cleaner();\n              }\n\n              if (!svf.fragments.polygonCounts)\n              svf.fragments.polygonCounts = new Int32Array(svf.fragments.length);\n\n              // Set bvh to svf, if it is posted with svf together.\n              if (ew.data.bvh) {\n                svf.bvh = ew.data.bvh;\n                scope.model.setBVH(new NodeArray(svf.bvh.nodes, svf.bvh.useLeanNodes), svf.bvh.primitives, scope.options.bvhOptions);\n                scope.viewer3DImpl.invalidate(false, true);\n              }_context.next = 26;break;case 25:\n\n              if (ew.data && ew.data.bvh) {\n                //Spatial index was done by the worker:\n                if (scope.svf && !scope.svf.bvh) {\n                  scope.svf.bvh = ew.data.bvh;\n                  scope.model.setBVH(new NodeArray(scope.svf.bvh.nodes, scope.svf.bvh.useLeanNodes), scope.svf.bvh.primitives, scope.options.bvhOptions);\n                  scope.viewer3DImpl.invalidate(false, true);\n                }\n                scope.loading = false;\n                cleaner();\n              } else if (ew.data && ew.data.mesh) {\n                //GLTF loader sends meshes from the main loader thread\n                scope.processReceivedMesh(ew.data);\n\n                if (ew.data.progress === 1) {\n                  scope.onGeomLoadDone();\n                  scope.loading = false;\n                  cleaner();\n                }\n              } else if (ew.data && ew.data.progress) {\n                if (ew.data.progress == 1) {\n                  scope.loading = false;\n                  cleaner();\n                }\n              } else if (ew.data && ew.data.error) {\n                scope.loading = false;\n                cleaner();\n                logger.error(\"Error while processing SVF: \" + JSON.stringify(ew.data.error.args));\n                if (onDone) {\n                  onDone(ew.data.error, null);\n                }\n              } else if (ew.data && ew.data.debug) {\n                logger.debug(ew.data.message);\n              } else {\n                logger.error(\"SVF download failed.\", errorCodeString(ErrorCodes.NETWORK_FAILURE));\n                //Download failed.\n                scope.loading = false;\n                cleaner();\n              }case 26:case \"end\":return _context.stop();}}}, _callee);}));return function onSVFLoad(_x) {return _ref.apply(this, arguments);};}();\n\n\n  w.addEventListenerWithIntercept(onSVFLoad);\n\n  msg.operation = WORKER_LOAD_SVF;\n  msg.interceptManifest = !!this.interceptManifest;\n  w.doOperation(initLoadContext(msg));\n\n  return true;\n};\n\nSvfLoader.prototype.loadGeometryPack = function (packId, path) {\n  var w;\n  var workerId;\n  var i, j;\n  var scope = this;\n\n  // If loader is already destructed, do nothing.\n  if (!this.svf || !this.isValid()) {\n    return;\n  }\n\n  var onMeshLoad = function onMeshLoad(ew) {\n    if (ew.data && ew.data.meshes) {\n\n      var meshes = ew.data.meshes;\n\n      var mdata = {\n        packId: ew.data.packId,\n        meshIndex: 0,\n        mesh: null };\n\n\n      for (var i = 0; i < meshes.length; i++) {\n        var mesh = meshes[i];\n\n        if (!mesh)\n        continue;\n\n        mdata.meshIndex = i;\n        mdata.mesh = mesh;\n\n        scope.processReceivedMesh(mdata);\n      }\n\n      //Is the worker done loading the geom pack?\n      if (ew.data.progress >= 1.0) {\n        scope.pack_workers[ew.data.workerId].queued -= 1;\n\n        scope.loadedPacksCount++;\n        scope.viewer3DImpl.signalProgress(100 * scope.loadedPacksCount / scope.svf.geompacks.length, ProgressState.LOADING, scope.model);\n\n        //Are all workers done?\n        var isdone = true;\n        for (j = 0; j < scope.pack_workers.length; j++) {\n          if (scope.pack_workers[j].queued != 0) {\n            isdone = false;\n            break;\n          }\n        }\n\n        if (isdone) {\n          for (j = 0; j < scope.pack_workers.length; j++) {\n            scope.pack_workers[j].clearAllEventListenerWithIntercept();\n            scope.pack_workers[j].terminate();\n          }\n          scope.pack_workers = null;\n        }\n\n        if (scope.loadedPacksCount + scope.failedToLoadPacksCount == scope.svf.geompacks.length) {//all workers are done?\n          scope.onGeomLoadDone();\n        }\n      }\n    } else if (ew.data && ew.data.progress) {\n      //download is done, queue the next download\n      scope.pack_workers[ew.data.workerId].queued -= 1;\n\n      if (scope.next_pack < scope.svf.geompacks.length) {\n\n        var pf = null;\n\n        if (!pf || pf.loading) {\n          while (scope.next_pack < scope.svf.geompacks.length) {\n            pf = scope.svf.geompacks[scope.next_pack++];\n            if (!pf.loading) {\n              break;\n            }\n          }\n        }\n\n        if (pf && !pf.loading) {\n          pf.loading = true;\n          scope.loadGeometryPack(pf.id, pf.uri);\n        } else\n        {\n          scope.viewer3DImpl.modelQueue().enforceBvh = false;\n          scope.svf.fragments.packIds = null; // not needed anymore\n        }\n      }\n    } else if (ew.data && ew.data.debug) {\n      logger.debug(ew.data.message);\n    } else if (ew.data && ew.data.error) {\n      ++scope.failedToLoadPacksCount;\n      scope.failedToLoadSomeGeometryPacks = { code: ew.data.error.code, msg: ew.data.error.msg };\n    } else {\n      //Download failed.\n      scope.pack_workers[ew.data.workerId].queued -= 2;\n    }\n  };\n\n  var pw = this.pack_workers;\n  if (!pw) {\n    pw = this.pack_workers = [];\n  }\n\n  //If all workers are busy and we are allowed to create more, then create a new one\n  if (pw.length < (av.NUM_WORKER_THREADS || NUM_WORKER_THREADS)) {\n    var allBusy = true;\n    for (i = 0; i < pw.length; i++) {\n      if (pw[i].queued === 0) {\n        allBusy = false;\n        break;\n      }\n    }\n\n    if (allBusy) {\n      var wr = this.createWorkerWithIntercept();\n      wr.addEventListenerWithIntercept(onMeshLoad);\n      wr.queued = 0;\n      pw.push(wr);\n    }\n  }\n\n  //Find the least busy worker\n  var which = 0;\n  var queued = pw[0].queued;\n  for (i = 1; i < pw.length; i++) {\n    if (pw[i].queued < queued) {\n      which = i;\n      queued = pw[i].queued;\n    }\n  }\n  w = pw[which];\n  w.queued += 2;\n  workerId = which;\n\n\n  //Pass unzip job to the worker\n  var reqPath = pathToURL(this.svf.basePath + path);\n  var xfer = { \"operation\": WORKER_LOAD_GEOMETRY,\n    \"url\": reqPath,\n    \"packId\": parseInt(packId), /* mesh IDs treat the pack file id as integer to save on storage in the per-fragment arrays */\n    \"workerId\": workerId,\n    \"createWireframe\": this.options.createWireframe ||\n    this.model.getMetadata('renderEnvironmentDisplayEdges', 'value', false),\n    \"packNormals\": this.options.packNormals,\n    \"queryParams\": this.queryParams };\n\n  w.doOperation(initLoadContext(xfer)); // Send data to our worker.\n};\n\n\nSvfLoader.prototype.processReceivedMesh = function (mdata) {\n  //Find all fragments that instance this mesh\n  var meshid = mdata.packId + \":\" + mdata.meshIndex;\n\n  var svf = this.svf;\n  var fragments = svf.fragments;\n  var rm = this.model;\n\n  var fragIndexes = fragments.mesh2frag[meshid];\n  if (fragIndexes === undefined) {\n    logger.warn(\"Mesh \" + meshid + \" was not referenced by any fragments.\");\n    return;\n  }\n  if (!Array.isArray(fragIndexes))\n  fragIndexes = [fragIndexes];\n\n  //Convert the received mesh to THREE buffer geometry\n  BufferGeometryUtils.meshToGeometry(mdata);\n  mdata.geometry.packId = mdata.packId;\n\n  var numInstances = fragIndexes.length;\n\n  //Reuse previous index of this geometry, if available\n  var idx = rm.getFragmentList().getGeometryId(fragIndexes[0]);\n  var geomId = rm.getGeometryList().addGeometry(mdata.geometry, numInstances, idx);\n\n  var ib = mdata.geometry.attributes['index'].array || mdata.geometry.ib;\n  var polyCount = ib.length / 3;\n\n  //For each fragment, add a mesh instance to the renderer\n  for (var i = 0; i < fragIndexes.length; i++) {\n    var fragId = 0 | fragIndexes[i];\n\n    // option: skip meshes if they are marked as hidden\n    if (svf.loadOptions.skipHiddenFragments) {\n      var isHidden = !(fragments.visibilityFlags[fragId] & MeshFlags.MESH_VISIBLE);\n      if (isHidden) {\n        continue;\n      }\n    }\n\n    //We get the matrix from the fragments and we set it back there\n    //with the activateFragment call, but this is to maintain the\n    //ability to add a plain THREE.Mesh -- otherwise it could be simpler\n    rm.getFragmentList().getOriginalWorldMatrix(fragId, this.tmpMatrix);\n\n    var materialId = fragments.materials[fragId].toString();\n\n    var mat = this.viewer3DImpl.matman().findMaterial(rm, materialId);\n\n    if (mat && !mat.texturesLoaded)\n    TextureLoader.loadMaterialTextures(rm, mat, this.viewer3DImpl);\n\n    if (fragments.polygonCounts)\n    fragments.polygonCounts[fragId] = polyCount;\n\n    var m = this.viewer3DImpl.setupMesh(this.model, mdata.geometry, materialId, this.tmpMatrix);\n\n    //If there is a placement transform, we tell activateFragment to also recompute the\n    //world space bounding box of the fragment from the raw geometry model box, for a tighter\n    //fit compared to what we get when loading the fragment list initially.\n    rm.activateFragment(fragId, m, !!svf.placementTransform);\n  }\n\n  //Call a custom mesh processing callback if one is supplied.\n  //This is used for streaming geometry pack processing in node.js tools.\n  //We are avoiding a more generic fireEvent mechanism in the interests of performance.\n  //TODO: In the future, consider skipping all the geometry adding logic above\n  //if such a callback is given -- it's most likely it only needs to look at the geometry then drop it\n  if (this.options.onMeshReceived) {\n    this.options.onMeshReceived(this.model, geomId, fragIndexes /*, mdata.geometry*/);\n  }\n\n  //don't need this mapping anymore.\n  fragments.mesh2frag[meshid] = null;\n\n  //Repaint and progress reporting\n  fragments.numLoaded += fragIndexes.length;\n\n  this.viewer3DImpl._signalMeshAvailable();\n\n  //repaint every once in a while -- more initially, less as the load drags on.\n  var geomList = rm.getGeometryList();\n  if (geomList.geomPolyCount > svf.nextRepaintPolys) {\n    //logger.log(\"num loaded \" + numLoaded);\n    this.firstPixelTimestamp = this.firstPixelTimestamp || Date.now();\n    svf.numRepaints++;\n    svf.nextRepaintPolys += 10000 * Math.pow(1.5, svf.numRepaints);\n    this.viewer3DImpl.invalidate(false, true);\n  }\n};\n\n//Some insane files come without any material reuse\n//which means we end up with ten of thousands of material objects\n//that are all the same. Create a re-mapping that gives a single ID\n//for all material IDs whose materials are duplicates\n/* currently not used\nfunction deduplicateMaterials(svf) {\n var mats = svf.materials.materials;\n var dedup = {};\nvar remap = [];\nvar count = 0;\nvar ucount = 0;\n for (var p in mats) {\n     var matIdx = parseInt(p);\n    var hash = JSON.stringify(mats[p]);\n     var idx = dedup[hash];\n     if (idx === undefined) {\n        remap[matIdx] = matIdx;\n        dedup[hash] = matIdx;\n        ucount++;\n    } else {\n        remap[matIdx] = idx;\n        mats[p].duplicateOf = idx;\n    }\n     count++;\n}\n logger.log(\"Total mats: \" + count + \" Unique mats:\" + ucount);\n var fmats = svf.fragments.materials;\nfor (var i=0; i<fmats.length; i++) {\n    fmats[i] = remap[fmats[i]];\n}\n return remap;\n}\n*/\n\n\n\n\n\n\n\n\n\n\n\nSvfLoader.prototype.onModelRootLoadDone = /*#__PURE__*/function () {var _ref2 = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee2(svf) {var t1, model, numMaterials, i, camera, metadataStats;return regeneratorRuntime.wrap(function _callee2$(_context2) {while (1) {switch (_context2.prev = _context2.next) {case 0:\n\n            svf.geomMemory = 0;\n            svf.fragments.numLoaded = 0;\n            svf.gpuNumMeshes = 0;\n            svf.gpuMeshMemory = 0;\n\n            svf.nextRepaintPolys = 0;\n            svf.numRepaints = 0;\n\n            svf.urn = this.svfUrn;\n            svf.acmSessionId = this.acmSessionId;\n\n            svf.basePath = this.basePath;\n\n            svf.loadOptions = this.options;\n\n            if (svf.verylargebbox) {\n              this.viewer3DImpl.setNearRadius(this.options.nearRadius || 1);\n            }\n\n            //var tM = Date.now();\n            //deduplicateMaterials(svf);\n\n            t1 = Date.now();\n            this.loadTime += t1 - this.t0;\n            logger.log(\"SVF load: \" + (t1 - this.t0));\n            //logger.log(\"Material dedup: \" + (t1 - tM));\n\n            // Create the API Model object and its render proxy\n            model = this.createModel(svf);\n\n            //For 3D models, we can start loading the property database as soon\n            //as we know the fragment list which contains the fragId->dbId map.\n            if (!this.options.skipPropertyDb) {\n              this.loadPropertyDb();\n            }_context2.next = 18;return (\n\n              this.convertMaterials(model));case 18:numMaterials = _context2.sent;\n\n            if (this.viewer3DImpl.matman().hasTwoSidedMaterials()) {\n              this.viewer3DImpl.renderer().toggleTwoSided(true);\n            }\n\n            this.t1 = t1;\n\n            //The BBox object loses knowledge of its\n            //type when going across the worker thread boundary...\n            svf.bbox = new THREE.Box3().copy(svf.bbox);\n\n            if (svf.refPointTransform) {\n              svf.refPointTransform = new LmvMatrix4(true).copy(svf.refPointTransform);\n            }\n            if (svf.placementTransform) {\n              svf.placementTransform = new LmvMatrix4(true).copy(svf.placementTransform);\n            }\n\n            //Camera vectors also lose their prototypes when they\n            //cross the thread boundary...\n            if (svf.cameras) {\n              for (i = 0; i < svf.cameras.length; i++) {\n                camera = svf.cameras[i];\n                camera.position = new THREE.Vector3().copy(camera.position);\n                camera.target = new THREE.Vector3().copy(camera.target);\n                camera.up = new THREE.Vector3().copy(camera.up);\n\n                // We have a case of a camera coming in with Nans for position and target. Not sure what to do in that case.\n                if (!isFinite(camera.position.x + camera.position.y + camera.position.z +\n                camera.target.x + camera.target.y + camera.target.z +\n                camera.up.x + camera.up.y + camera.up.z)) {\n                  // Some coordinate in position, target or up is junk. Scrap them. Put the target at\n                  // the center of the bounding box and the position outside of the bounding box.\n                  camera.target = svf.bbox.center();\n                  camera.position.copy(camera.target);\n                  camera.position.z += svf.bbox.max.z - svf.bbox.min.z;\n                  camera.up = { x: 0, y: 1, z: 0 };\n                }\n                if (!isFinite(camera.aspect)) {\n                  camera.aspect = 1;\n                }\n                if (!isFinite(camera.fov)) {\n                  camera.fov = 90;\n                }\n                if (!isFinite(camera.orthoScale)) {\n                  camera.orthoScale = 1;\n                }\n              }\n            }\n\n            //If the textures are likely to come from the Protein CDN\n            //load them in parallel with the geometry packs\n            //if (svf.proteinMaterials && PROTEIN_ROOT && PRISM_ROOT) {\n            //    TextureLoader.loadModelTextures(this.model, this.viewer3DImpl);\n            //}\n\n            logger.log(\"scene bounds: \" + JSON.stringify(svf.bbox));\n\n            metadataStats = {\n              category: \"metadata_load_stats\",\n              urn: svf.urn,\n              has_topology: !!svf.topologyPath,\n              has_animations: !!svf.animations,\n              cameras: svf.cameras ? svf.cameras.length : 0,\n              lights: svf.lights ? svf.lights.length : 0,\n              materials: numMaterials,\n              is_mobile: isMobileDevice() };\n\n            logger.track(metadataStats);\n\n            this.viewer3DImpl.signalProgress(5, ProgressState.ROOT_LOADED, this.model);\n            this.viewer3DImpl.invalidate(false, false);case 30:case \"end\":return _context2.stop();}}}, _callee2, this);}));return function (_x2) {return _ref2.apply(this, arguments);};}();\n\n\n\n/**\n                                                                                                                                                                                              * Converts from SVF materials json to THREE.js materials and adds them to the MaterialManager\n                                                                                                                                                                                              * @param {RenderModel} model\n                                                                                                                                                                                              */\nSvfLoader.prototype.convertMaterials = /*#__PURE__*/function () {var _ref3 = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee3(model) {var matman, svf, totalAdded, p, gltfmats, gltfMat, phongMat, matName, mats, prismmats, isPrism, matObj;return regeneratorRuntime.wrap(function _callee3$(_context3) {while (1) {switch (_context3.prev = _context3.next) {case 0:\n\n            matman = this.viewer3DImpl.matman();\n            svf = model.getData();\n            totalAdded = 0;if (\n\n\n            svf.materials) {_context3.next = 5;break;}return _context3.abrupt(\"return\",\n            totalAdded);case 5:if (!\n\n\n            svf.gltfMaterials) {_context3.next = 9;break;}\n\n            gltfmats = svf.materials[\"materials\"];\n            for (p in gltfmats) {\n\n              gltfMat = gltfmats[p];\n              phongMat = MaterialConverter.convertMaterialGltf(gltfMat, svf);\n              matName = matman._getMaterialHash(model, p);\n              matman.addMaterial(matName, phongMat, false);\n              totalAdded++;\n            }return _context3.abrupt(\"return\",\n\n            totalAdded);case 9:\n\n\n            // Get outer Protein materials block.\n            // The way this works: there is always (supposed to be) a Materials.json file in SVF. This\n            // is put into svf.materials[\"materials\"]. There is also, optionally, a ProteinMaterials.json\n            // file, read into svf.proteinMaterials[\"materials\"]. We look through the Protein materials\n            // (if present) and see which ones we can interpret (currently only PRISM materials). If we\n            // can interpret it, great. Otherwise, we use the Materials.json file's version, which is\n            // (always) a SimplePhong material.\n            mats = svf.materials[\"materials\"];\n            prismmats = svf.proteinMaterials ? svf.proteinMaterials[\"materials\"] : null;_context3.t0 = regeneratorRuntime.keys(\n\n            mats);case 12:if ((_context3.t1 = _context3.t0()).done) {_context3.next = 21;break;}p = _context3.t1.value;\n\n            isPrism = prismmats && prismmats[p] && MaterialConverter.isPrismMaterial(prismmats[p]);\n\n            //If the definition is prism, use the prism object.\n            matObj = isPrism ? prismmats[p] : mats[p];_context3.next = 18;return (\n\n              matman.convertOneMaterial(model, matObj, matman._getMaterialHash(model, p)));case 18:\n\n            totalAdded++;_context3.next = 12;break;case 21:return _context3.abrupt(\"return\",\n\n\n            totalAdded);case 22:case \"end\":return _context3.stop();}}}, _callee3, this);}));return function (_x3) {return _ref3.apply(this, arguments);};}();\n\n\n\nSvfLoader.prototype.makeBVH = function (svf) {\n  var t0 = performance.now();\n  var mats = svf.materials ? svf.materials[\"materials\"] : null;\n  svf.bvh = new BVHBuilder(svf.fragments, mats);\n  svf.bvh.build(this.options.bvhOptions || { isWeakDevice: isMobileDevice() });\n  var t1 = performance.now();\n  logger.log(\"BVH build time: \" + (t1 - t0));\n};\n\n\nSvfLoader.prototype.onGeomLoadDone = function () {\n  this.svf.loadDone = true;\n\n  //launch the texture loads in case that was not done already\n  //Note that most materials are probably done already as their geometry\n  //is received, so this logic will most likely just trigger the textureLoadComplete event.\n  TextureLoader.loadModelTextures(this.model, this.viewer3DImpl);\n\n  // We need to keep a copy of the original fragments\n  // transforms in order to restore them after explosions, etc.\n  // the rotation/scale 3x3 part.\n  // TODO: consider only keeping the position vector and throwing out\n  //\n  //delete this.svf.fragments.transforms;\n\n  // Release that won't be used. the on demand loading won't call this anyway.\n  this.svf.fragments.entityIndexes = null;\n  this.svf.fragments.mesh2frag = null;\n\n  // flags for initial visibility have now all been processed\n  this.svf.fragments.visibilityFlags = null;\n\n  var t1 = Date.now();\n  var msg = \"Fragments load time: \" + (t1 - this.t1);\n  this.loadTime += t1 - this.t0;\n\n  var firstPixelTime = this.firstPixelTimestamp - this.t0;\n  msg += ' (first pixel time: ' + firstPixelTime + ')';\n\n  //If there is a post-transform, the BVH has to be computed after\n  //all the world transforms/boxes are updated\n  if (!this.svf.bvh || this.svf.placementTransform) {\n    this.makeBVH(this.svf);\n    this.model.setBVH(this.svf.bvh.nodes, this.svf.bvh.primitives, this.options.bvhOptions);\n  }\n  logger.log(msg);\n\n  // Run optional consolidation step\n  if (this.options.useConsolidation)\n  this.model.consolidate(this.viewer3DImpl.getMaterials(), this.options.consolidationMemoryLimit, this.viewer3DImpl.glrenderer());\n\n  var modelStats = {\n    category: \"model_load_stats\",\n    is_f2d: false,\n    has_prism: this.viewer3DImpl.matman().hasPrism,\n    load_time: this.loadTime,\n    geometry_size: this.model.getGeometryList().geomMemory,\n    meshes_count: this.model.getGeometryList().geoms.length,\n    fragments_count: this.model.getFragmentList().getCount(),\n    urn: this.svfUrn };\n\n  if (firstPixelTime > 0) {\n    modelStats['first_pixel_time'] = firstPixelTime; // time [ms] from SVF load to first geometry rendered\n  }\n  logger.track(modelStats, true);\n\n  var geomList = this.model.getGeometryList();\n  var dataToTrack = {\n    load_time: this.loadTime,\n    polygons: geomList.geomPolyCount,\n    fragments: this.model.getFragmentList().getCount(),\n    mem_usage: geomList.gpuMeshMemory };\n\n  avp.analytics.track('viewer.model.loaded', dataToTrack);\n\n  this.currentLoadPath = null;\n\n  this.viewer3DImpl.onLoadComplete(this.model);\n};\n\n\nSvfLoader.prototype.loadPropertyDb = function () {\n  this.svf.propDbLoader = new PropDbLoader(this.sharedDbPath, this.model, this.viewer3DImpl.api);\n  this.svf.propDbLoader.load();\n};\n\nSvfLoader.prototype.fetchTopologyFile = function (fullpath, onComplete) {\n\n  if (this.fetchingTopology)\n  return;\n\n  this.fetchingTopology = true;\n\n  var ww = this.createWorkerWithIntercept();\n  ww.addEventListenerWithIntercept(onTopology);\n\n  var msg = {\n    path: fullpath,\n    queryParams: this.queryParams };\n\n  var t0 = new Date().getTime();\n  var t1, t2, timeSpan;\n  logger.log('Fetching topology file...');\n  msg.operation = WORKER_FETCH_TOPOLOGY;\n  ww.doOperation(initLoadContext(msg));\n\n  var that = this;\n  function onTopology(workerEvent) {\n\n    // Status check\n    if (workerEvent.data['status-topology']) {\n      t1 = new Date().getTime();\n      timeSpan = Math.round((t1 - t0) / 1000);\n      logger.log('Topology file downloaded. (' + timeSpan + ' seconds). Processing...');\n      return;\n    }\n\n    // Done processing.\n    var topoData = workerEvent.data['fetch-topology'];\n    if (topoData) {\n      t2 = new Date().getTime();\n      timeSpan = Math.round((t2 - t1) / 1000);\n      if (topoData.topology) {\n        logger.log('Topology file processed successfully! (' + timeSpan + ' seconds).');\n      } else {\n        logger.log('Topology file processed, but an error ocurred. (' + timeSpan + ' seconds).');\n      }\n      onComplete(topoData);\n      that.fetchingTopology = false;\n      ww.clearAllEventListenerWithIntercept();\n      ww.terminate();\n      ww = null;\n    }\n  }\n};\n\nSvfLoader.prototype.is3d = function () {\n  return true;\n};\n\n\n// If you change the fileLoaderId or the extensions, then make sure you make\n// the same change in extensions/MemoryLimited/MemoryLimited.js\nFileLoaderManager.registerFileLoader(\"svf\", [\"svf\", \"gltf\", \"glb\"], SvfLoader);","import { ViewingService } from \"../net/Xhr\";\nimport { isChrome, isWindows, isMobileDevice, isNodeJS, isIOSDevice, getGlobal } from \"../../compat\";\nimport { pathToURL } from \"../net/Xhr\";\nimport { errorCodeString, ErrorCodes } from \"../net/ErrorCodes\";\nimport { MaterialConverter } from \"../../wgs/render/MaterialConverter\";\nimport { DecodeEnvMap } from \"../../wgs/render/DecodeEnvMap\";\nimport { logger } from \"../../logger/Logger\";\nimport * as THREE from \"three\";\nimport { DDSLoader } from \"../../../thirdparty/three.js/DDSLoader\";\nimport { endpoint } from \"../net/endpoints\";\nvar Pend = require(\"pend\"); //this module has issues with ES6 import because it sets module.exports directly.\n\nvar _window = getGlobal();\nvar _document = _window.document;\n\n//Texture parallel request rate limiting\nvar _texQueue = new Pend();\n_texQueue.max = isMobileDevice() ? 4 : 6;\n\nvar _requestsInProgress = 0;\nvar TEXTURE_MEMORY = isMobileDevice() ? 32 : Infinity;\nTEXTURE_MEMORY *= 1024 * 1024;\nvar _textureCount = 0;\nvar _textureSize = Infinity; // Max texture sizes in pixels\n\n\n\nfunction resizeImage(img, onResizeDone) {\n\n  var ow = img.width;\n  var oh = img.height;\n  var w, h;\n\n  //It's a power of two already and not too large\n  if ((ow & ow - 1) === 0 && (oh & oh - 1) === 0) {\n    if (ow * oh <= _textureSize) {\n      onResizeDone(img);\n      return;\n    }\n    w = ow;\n    h = oh;\n  } else {\n    w = 1;while (w * 1.5 < ow) {w *= 2;}\n    h = 1;while (h * 1.5 < oh) {h *= 2;}\n  }\n\n  while (w * h > _textureSize) {\n    w = Math.max(w / 2, 1);\n    h = Math.max(h / 2, 1);\n  }\n\n  var canvas = _document.createElement(\"canvas\");\n  var ctx = canvas.getContext(\"2d\");\n  canvas.width = w;\n  canvas.height = h;\n\n  ctx.drawImage(img, 0, 0, w, h);\n\n  var outputImg = new Image();\n\n  outputImg.src = canvas.toDataURL();\n\n  outputImg.onload = function () {\n    onResizeDone(outputImg);\n  };\n\n  outputImg.onerror = function (e) {\n    logger.error(e, errorCodeString(ErrorCodes.UNKNOWN_FAILURE));\n    onResizeDone(null);\n  };\n}\n\nfunction imageToCanvas(img, isMultiply, backroundColor) {\n\n  var w = img.width;\n  var h = img.height;\n\n  var canvas = _document.createElement(\"canvas\");\n  var ctx = canvas.getContext(\"2d\");\n  ctx.globalCompositeOperation = \"copy\";\n  canvas.width = w;\n  canvas.height = h;\n\n  // When the image is used to do multiply blending, we need to add background color\n  // to avoid the premultiplied texture artifacts, a black box around the gradient contents\n  if (isMultiply) {\n    ctx.fillStyle = backroundColor || \"#FFFFFF\";\n    ctx.fillRect(0, 0, w, h);\n  }\n  ctx.drawImage(img, 0, 0, w, h);\n\n  return canvas;\n}\n\n\nfunction textureHasAlphaChannel(texture) {\n\n  return texture.format === THREE.AlphaFormat || texture.format === THREE.RGBAFormat;\n\n}\n\nfunction textureUsesClamping(texture) {\n\n  return texture.clampS || texture.clampT;\n\n}\n\nfunction textureUsesMipmapping(texture) {\n\n  return texture.minFilter !== THREE.NearestFilter && texture.minFilter !== THREE.LinearFilter;\n\n  // Full test, but the Chrome bug happens only on mipmapping, from what we can tell.\n  // if wrapping is not clamp to edge, or minFilter is a mipmap mode, then we need power of two.\n  //return ( texture.wrapS !== THREE.ClampToEdgeWrapping || texture.wrapT !== THREE.ClampToEdgeWrapping ) ||\n  //  ( texture.minFilter !== THREE.NearestFilter && texture.minFilter !== THREE.LinearFilter );\n\n}\n\nfunction arrayBufferToImageUrl(buffer) {\n\n  var arrayBuffer = new Uint8Array(buffer);\n  var blob = new Blob([arrayBuffer], { type: \"image/jpeg\" });\n  var urlCreator = _window.URL || _window.webkitURL;\n\n  return urlCreator.createObjectURL(blob);\n}\n\n\nfunction loadTextureWithSecurity(path, mapping, callback, onError, acmSessionId, skipResize, options) {\n\n  var useCredentials = endpoint.getUseCredentials(); //We need to send authorization somehow (cookie or header)?\n  var useCookie = endpoint.getUseCookie(); //We are using cookie for aithorization. We can use HTML Image element to load textures.\n\n  //Set up CORS for the image element\n  if (useCredentials && useCookie) {//CORS with credentials\n    THREE.ImageUtils.crossOrigin = 'use-credentials';\n  } else if (endpoint.getUseCredentials()) {//CORS without credentials (yes, the API is confusingly named, it should be \"getUseCORS\" perhaps?)\n    THREE.ImageUtils.crossOrigin = 'anonymous';\n  } else {\n    THREE.ImageUtils.crossOrigin = ''; //No CORS.\n  }\n\n  var queryParams = \"\";\n  if (useCredentials && acmSessionId) {\n    queryParams = \"acmsession=\" + acmSessionId;\n  }\n\n  if (options && options.queryParams) {\n    queryParams = queryParams ? queryParams + \"&\" : \"\";\n    queryParams += options.queryParams;\n  }\n\n  var loadContext = endpoint.initLoadContext({ queryParams: queryParams });\n\n  _requestsInProgress++;\n\n  _texQueue.go(function (pendCB) {\n\n    var callbackWithoutResize = function callbackWithoutResize(tex, error) {\n      _requestsInProgress--;\n      if (error && onError) {\n        onError(error);\n      } else {\n        callback(tex);\n      }\n      pendCB();\n    };\n\n    //In the web browser (non-node) case, we always pass through\n    //the power of two resizer if the image is not opaque DataTexture\n    var callbackWithResize = skipResize ? callbackWithoutResize :\n    function (tex) {\n      function onResizeDone(image) {\n        if (tex) {\n          tex.image = image;\n        }\n\n        _requestsInProgress--;\n        callback(tex);\n        pendCB();\n      }\n\n      if (tex && tex.image) {\n        resizeImage(tex.image, onResizeDone);\n      } else {\n        onResizeDone();\n      }\n    };\n\n    var simpleError = function simpleError(e) {\n      _requestsInProgress--;\n      logger.error(\"Texture load error\", e);\n      callback(null);\n      pendCB();\n    };\n\n    //For node.js, always use the \"manual\" load code path\n    if (isNodeJS()) {\n      loadTextureWithTokenNode(path, loadContext, mapping, callbackWithoutResize, options);\n      return;\n    }\n\n    if (path.slice(path.length - 4).toLocaleLowerCase() === \".dds\") {\n      if (isIOSDevice()) {\n        var pvrPath = path.slice(0, path.length - 4) + \".pvr\";\n        new PVRLoader().load(pvrPath + \"?\" + loadContext.queryParams, callbackWithoutResize, simpleError);\n      } else {\n        new DDSLoader().load(path + \"?\" + loadContext.queryParams, callbackWithoutResize, simpleError);\n      }\n    } else if (useCredentials && !useCookie || options && (options.rawData || options.extractImage)) {\n      loadTextureWithToken(path, loadContext, mapping, callbackWithResize, options);\n    } else {\n      var match = /(\\w+):\\/\\//gi.exec(path);\n\n      // DWF Loader might need to load raster data from virtual file system\n      // So we need to use viewing services to fetch the resource\n      if (match && !/^(https?|file|blob:https?):\\/\\//gi.test(path)) {\n        Autodesk.Viewing.Private.ViewingService.rawGet(\"\", \"\", path, function (data) {\n          function bufferToBase64(buf) {\n            var binstr = Array.prototype.map.call(buf, function (ch) {\n              return String.fromCharCode(ch);\n            }).join('');\n            return btoa(binstr);\n          }\n\n          var ext = /\\.(\\w+)$/gi.exec(path);\n          if (ext) {\n            ext = ext[1];\n          } else {\n            ext = \"png\";\n          }\n\n          var base64Url = \"data:image/\".concat(ext, \";base64, \") + bufferToBase64(data);\n          THREE.ImageUtils.loadTexture(base64Url, mapping, callbackWithResize, simpleError);\n        }, console.error);\n      } else {\n        THREE.ImageUtils.loadTexture(loadContext.queryParams ? path + \"?\" + loadContext.queryParams : path, mapping, callbackWithResize, simpleError);\n      }\n    }\n  });\n\n}\n\n\n\n// For texture loading, three.js expects loadable URL for the image.\n// When we put the token in request header instead of cookie, we need AJAX the\n// texture and base64 encode it to create a data URI and feed it to three.js.\nfunction loadTextureWithToken(path, loadContext, mapping, callback, options) {\n\n  var texture = new THREE.Texture(undefined, mapping);\n\n  function onSuccess(data) {\n    if (options && options.extractImage) {\n      data = options.extractImage(data);\n    }\n\n    var image = new Image();\n    texture.image = image;\n\n    image.onload = function () {\n      texture.needsUpdate = true;\n      if (callback) callback(texture);\n\n      _window.URL.revokeObjectURL(image.src);\n    };\n    image.onerror = function (e) {\n      logger.error(e, errorCodeString(ErrorCodes.UNKNOWN_FAILURE));\n      if (callback) callback(null);\n    };\n\n    image.src = arrayBufferToImageUrl(data);\n  }\n\n  function onTextureFailure(statusCode, statusText) {\n\n    var errorMsg = \"Error: \" + statusCode + \" (\" + statusText + \")\";\n    logger.error(errorMsg, errorCodeString(ErrorCodes.NETWORK_SERVER_ERROR));\n\n    //We need to call the callback because it decrements the pending texture counter\n    callback && callback(null, { msg: statusText, args: statusCode });\n  }\n\n  if (options && options.rawData) {\n    onSuccess(options.rawData);\n  } else {\n    ViewingService.getItem(loadContext, path, onSuccess, onTextureFailure, options);\n  }\n\n  return texture;\n}\n\n\nfunction loadTextureWithTokenNode(path, loadContext, mapping, callback, options) {\n\n  var texture = new THREE.DataTexture(undefined, mapping);\n\n  function onSuccess(data) {\n    if (options && options.extractImage) {\n      data = options.extractImage(data);\n    }\n\n    texture.image = { data: data, width: undefined, height: undefined };\n\n    texture.needsUpdate = true;\n    if (callback) callback(texture);\n  }\n\n  function onTextureFailure(statusCode, statusText) {\n\n    var errorMsg = \"Error: \" + statusCode + \" (\" + statusText + \")\";\n    logger.error(errorMsg, errorCodeString(ErrorCodes.NETWORK_SERVER_ERROR));\n\n    //We need to call the callback because it decrements the pending texture counter\n    callback && callback(null, { msg: statusText, args: statusCode });\n  }\n\n  ViewingService.getItem(loadContext, path, onSuccess, onTextureFailure);\n\n  return texture;\n\n}\n\n\nfunction requestTexture(uri, model, onReady) {\n\n  var svf = model.getData();\n\n  function determineSvfTexturePath(uri) {\n\n    var texPath = null;\n\n    for (var j = 0; j < svf.manifest.assets.length; ++j)\n    {\n      var asset = svf.manifest.assets[j];\n      if (asset.id.toLowerCase() == uri.toLowerCase()) {\n        var _uri = asset.URI;\n        if (_uri.indexOf(\"://\") === -1)\n        _uri = svf.basePath + _uri;\n        texPath = pathToURL(_uri);\n        break;\n      }\n    }\n    if (!texPath) {\n      texPath = pathToURL(svf.basePath + uri);\n    }\n\n    return texPath;\n  }\n\n  function determineOtgTexturePath(uri) {\n\n    var loadContext = endpoint.initLoadContext({});\n\n    // get request url\n    var url = svf.makeSharedResourcePath(loadContext.otg_cdn, \"textures\", uri);\n\n    return url;\n  }\n\n  uri = uri.replace(/\\\\/g, \"/\");\n  var texPath = model.isOTG() ? determineOtgTexturePath(uri) : determineSvfTexturePath(uri);\n\n  return loadTextureWithSecurity(texPath, THREE.UVMapping, onReady, null, svf.acmSessionId);\n}\n\n\nfunction loadMaterialTextures(model, material, viewerImpl) {\n\n  if (!material.textureMaps)\n  return;\n\n  if (material.texturesLoaded)\n  return;\n\n  material.texturesLoaded = true;\n\n  var svf = model.getData();\n\n  // Iterate and parse textures from ugly JSON for each texture type in material.\n  // If has URI and valid mapName load and initialize that texture.\n  var textures = material.textureMaps;\n  for (var mapName in textures) {\n    var textureDef = textures[mapName];\n\n    if (!viewerImpl.matman().loadTextureFromCache(model, material, textureDef, mapName)) {\n\n      //Create the three.js texture object (with delay loaded image data)\n      var texture = requestTexture(textureDef.uri, model,\n      //capture map because it varies inside the loop\n      function (textureDef) {\n        return function (tex) {\n\n          //NOTE: tex could be null here in case of load error.\n          if (tex) {\n            var units = svf.materials.scene.SceneUnit;\n            var anisotropy = viewerImpl.renderer() ? viewerImpl.renderer().getMaxAnisotropy() : 0;\n            var converter = textureDef.converter || MaterialConverter.convertTexture;\n            converter(textureDef, tex, units, anisotropy);\n          }\n\n          var matman = viewerImpl.matman();\n\n          //It's possible MaterialManager got destroyed before the texture loads\n          if (!matman)\n          return;\n\n          matman.setTextureInCache(model, textureDef, tex);\n\n          //Private API: Call a custom texture processing callback if one is supplied.\n          //This is used for texture processing in node.js tools.\n          //We are avoiding a more generic fireEvent mechanism in order to avoid publishing\n          //yet another event type.\n          if (svf.loadOptions.onTextureReceived) {\n            svf.loadOptions.onTextureReceived(matman, textureDef, tex, !requestsInProgress());\n          }\n\n          //Unfortunately we have to check for texture load complete here also, not just\n          //in the final call to loadTextures. This is because geometry load can complete\n          //before or after texture load completes.\n          if (!requestsInProgress() && viewerImpl && svf.loadDone && !svf.texLoadDone) {\n            svf.texLoadDone = true;\n            viewerImpl.onTextureLoadComplete(model);\n          }\n        };\n      }(textureDef));\n\n    }\n  }\n\n}\n\n\n/**\n   * Loads all textures for a specific model.\n   * Textures delayed until all geometry is loaded, hence not done in convertMaterials.\n   */\nfunction loadModelTextures(model, viewerImpl) {\n\n  var matman = viewerImpl.matman();\n\n  var hash = matman._getModelHash(model);\n\n\n  //Set textureCount to enable texture resizing on mobile.\n  //This is only really useful to determine texture budget when a single SVF\n  //is to be loaded. It doesn't work at all if multiple models are to be loaded/unloaded\n  //and the OTG loader doesn't ever pass through here, because it loads materials one by one.\n  var textureCount = 0;\n\n  if (model.isOTG()) {\n    textureCount = model.getData().metadata.stats.num_textures || 0;\n  } else {\n    for (var p in matman._materials) {\n\n      //Prevent textures for already loaded models from being loaded\n      //again. Not elegant, and we can somehow only process the materials\n      //per model.\n      if (p.indexOf(hash) === -1)\n      continue;\n\n      var material = matman._materials[p];\n      if (material.textureMaps) {\n        textureCount += Object.keys(material.textureMaps).length;\n      }\n    }\n  }\n\n  setTextureCount(textureCount);\n\n\n  for (var p in matman._materials) {\n\n    //Prevent textures for already loaded models from being loaded\n    //again. Not elegant, and we can somehow only process the materials\n    //per model.\n    if (p.indexOf(hash) === -1)\n    continue;\n\n    var material = matman._materials[p];\n    loadMaterialTextures(model, material, viewerImpl);\n  }\n\n\n  //Model had no textures at all, call the completion callback immediately\n  var svf = model.getData();\n  if (!requestsInProgress() && viewerImpl && svf.loadDone && !svf.texLoadDone) {\n    svf.texLoadDone = true;\n    viewerImpl.onTextureLoadComplete(model);\n  }\n}\n\n\nfunction loadCubeMap(path, exposure, onReady) {\n\n  var texLoadDone = function texLoadDone(map) {\n\n    if (map) {\n      map.mapping = THREE.CubeReflectionMapping;\n      map.LogLuv = path.indexOf(\"logluv\") !== -1;\n      map.RGBM = path.indexOf(\"rgbm\") !== -1;\n\n      // TODO: Turn on use of half-float textures for envmaps. Disable due to blackness on Safari.\n      DecodeEnvMap(map, exposure, false /*isMobileDevice() ? false : this.viewer.glrenderer().supportsHalfFloatTextures()*/, onReady);\n    } else {\n      if (onReady) {\n        onReady(map);\n      }\n    }\n\n  };\n\n  var cubeMap;\n\n  THREE.ImageUtils.crossOrigin = '';\n\n  if (Array.isArray(path)) {\n    cubeMap = THREE.ImageUtils.loadTextureCube(path, THREE.CubeReflectionMapping, texLoadDone);\n    cubeMap.format = THREE.RGBFormat;\n  } else\n  if (typeof path === \"string\") {\n    if (path.toLowerCase().indexOf(\".dds\") !== -1) {\n      cubeMap = new DDSLoader().load(path, texLoadDone);\n    } else\n    {\n      cubeMap = THREE.ImageUtils.loadTexture(path, THREE.SphericalReflectionMapping, onReady);\n      cubeMap.format = THREE.RGBFormat;\n    }\n  } else if (path) {\n    //here we assume path is already a texture object\n    if (onReady) {\n      onReady(path);\n    }\n  } else\n  {\n    if (onReady) {\n      onReady(null);\n    }\n  }\n\n  return cubeMap;\n}\n\n\n/**\n   * Return the number of outstanding texture requests\n   */\nfunction requestsInProgress() {\n  return _requestsInProgress;\n}\n\n/**\n   * Set the max request count\n   * @param count The maximum number of outstanding request that can be started in parallel.\n   */\nfunction setMaxRequest(count) {\n  if (count > 0)\n  _texQueue.max = count;\n}\n\n/**\n   * Get the max request count\n   */\nfunction getMaxRequest() {\n  return _texQueue.max;\n}\n\n/**\n   * Set the texture memory limit\n   * @param size The memory allowed for textures.\n   */\nfunction setMemoryLimit(size) {\n  if (size > 0) {\n    TEXTURE_MEMORY = size;\n    setTextureCount(_textureCount);\n  }\n}\n\n/**\n   * Get the texture memory limit\n   */\nfunction getMemoryLimit() {\n  return TEXTURE_MEMORY;\n}\n\n/**\n   * Set the texture count. This is set by loadModelTextures\n   * @param count The count of textures for model\n   */\nfunction setTextureCount(count) {\n  if (count >= 0) {\n    _textureCount = count;\n    _textureSize = Math.max(16 * 1024, TEXTURE_MEMORY / (_textureCount * 4));\n  }\n}\n\n/**\n   * Get the texture count\n   */\nfunction getTextureCount() {\n  return _textureCount;\n}\n\n// Calculate the memory used by a texture\nfunction calculateTextureSize(tex) {\n  var pixsize = 4; // assume 4 byte pixels.\n  switch (tex.format) {\n    case THREE.AlphaFormat:\n      pixsize = 1;\n      break;\n    case THREE.RGBFormat:\n      pixsize = 3;\n      break;\n    case THREE.LuminanceFormat:\n      pixsize = 1;\n      break;\n    case THREE.LuminanceAlphaFormat:\n      pixsize = 2;\n      break;}\n\n  switch (tex.type) {\n    case THREE.ShortType:\n    case THREE.UnsignedShortType:\n    case THREE.HalfFloatType:\n      pixsize *= 2;\n      break;\n    case THREE.IntType:\n    case THREE.UnsignedIntType:\n    case THREE.FloatType:\n      pixsize *= 4;\n      break;\n    case THREE.UnsignedShort4444Type:\n    case THREE.UnsignedShort5551Type:\n    case THREE.UnsignedShort565Type:\n      pixsize = 2;\n      break;}\n\n  var rowsize = pixsize * tex.image.width;\n  rowsize += tex.unpackAlignment - 1;\n  rowsize -= rowsize % tex.unpackAlignment;\n  return tex.image.height * rowsize;\n}\n\n\n\nexport var TextureLoader = {\n  loadTextureWithSecurity: loadTextureWithSecurity,\n  loadMaterialTextures: loadMaterialTextures,\n  loadModelTextures: loadModelTextures,\n  loadCubeMap: loadCubeMap,\n  requestsInProgress: requestsInProgress,\n  calculateTextureSize: calculateTextureSize,\n  imageToCanvas: imageToCanvas };","var _require =\nrequire('../../compat'),isNodeJS = _require.isNodeJS,getGlobal = _require.getGlobal;\nvar getResourceUrl = require('../../globals').getResourceUrl;\n\nif (isNodeJS()) {\n\n  (function () {\n    //Node.js case -- the web worker is a \"fake\" worker\n    //running on the main thread.\n    var MainWorker = require('../workers/MainWorker-node').MainWorker;\n\n    function createWorker() {\n      return new MainWorker();\n    }\n\n    function createWorkerWithIntercept() {\n      return createWorker();\n    }\n\n    function initWorkerScript(successCB, errorCB) {\n      if (successCB)\n      successCB();\n    }\n\n    module.exports = {\n      createWorker: createWorker,\n      initWorkerScript: initWorkerScript,\n      createWorkerWithIntercept: createWorkerWithIntercept };\n\n\n  })();\n\n} else {\n\n  (function () {\n\n    var avp = Autodesk.Viewing.Private;\n\n    //Those are globals -- set by the build system.\n    var LMV_WORKER_URL = avp.LMV_WORKER_URL || \"src/file-loaders/workers/MainWorker-web.js\";\n\n\n    // A cache of entire worker script as data URL.\n    var WORKER_DATA_URL = null;\n    var WORKER_FETCHING_SCRIPT = false;\n    var WORKER_FETCHING_CALLBACKS = [];\n\n    // This mainly is used for testing.\n    function clearWorkerDataURL() {\n      // A cache of entire worker script as data URL.\n      WORKER_DATA_URL = null;\n    }\n\n    function initWorkerScript(successCB, errorCB) {\n\n      if (avp.ENABLE_INLINE_WORKER && !WORKER_DATA_URL) {\n\n        WORKER_FETCHING_CALLBACKS.push({\n          successCB: successCB });\n\n\n        if (!WORKER_FETCHING_SCRIPT) {\n          var xhr = new XMLHttpRequest();\n          var scriptURL = LMV_WORKER_URL;\n\n          // We need to request the same version of the library for this worker.  Take the original\n          // script url, which will already have the version string (if provided).\n          //\n          var originalScriptURL = getResourceUrl(LMV_WORKER_URL);\n\n          if (originalScriptURL) {\n            scriptURL = originalScriptURL;\n          }\n\n          xhr.open(\"GET\", scriptURL, true);\n          xhr.withCredentials = false;\n\n          xhr.onload = function () {\n\n            var _window = getGlobal();\n            // Set up global cached worker script.\n            WORKER_FETCHING_SCRIPT = false;\n            var blob;\n            _window.URL = _window.URL || _window.webkitURL;\n\n            try {\n              blob = new Blob([xhr.responseText], { type: 'application/javascript' });\n            } catch (e) {\n              // Backward compatibility.\n              var builder = new BlobBuilder();\n              builder.append(xhr.responseText);\n              blob = builder.getBlob();\n            }\n            WORKER_DATA_URL = URL.createObjectURL(blob);\n\n            var callbacks = WORKER_FETCHING_CALLBACKS.concat(); // Shallow copy\n            WORKER_FETCHING_CALLBACKS = [];\n            for (var i = 0; i < callbacks.length; ++i) {\n              callbacks[i].successCB && callbacks[i].successCB();\n            }\n          };\n\n          WORKER_FETCHING_SCRIPT = true;\n          xhr.send();\n        }\n\n        // Return a token that can be used to cancel the async call result.\n        var token = {};\n        token.cancel = function () {\n          var idx = -1;\n          if (WORKER_FETCHING_CALLBACKS.some(function (cb, i) {\n            if (cb.successCB == successCB) {\n              idx = i;\n              return true;\n            }\n            return false;\n          })) {\n            WORKER_FETCHING_CALLBACKS.splice(idx, 1);\n            return true;\n          }\n\n          return false;\n        };\n\n        return token;\n      } else {\n        if (successCB)\n        successCB();\n      }\n\n      return null;\n    };\n\n    // Create a web worker.\n    function createWorker(needFarwardProtocolHanlder) {\n\n      var w;\n\n      // When we are not at release mode, create web worker directly from URL.\n      if (avp.ENABLE_INLINE_WORKER) {\n        w = new Worker(WORKER_DATA_URL);\n      } else {\n        w = new Worker(getResourceUrl(LMV_WORKER_URL));\n      }\n\n      w.doOperation = w.postMessage;\n\n      if (needFarwardProtocolHanlder === true) {\n        avp.ViewingService.forwardProtocolHandlerToWorker(w);\n      }\n\n      return w;\n    }\n\n\n    function createWorkerWithIntercept(needFarwardProtocolHanlder) {\n      var worker = createWorker(needFarwardProtocolHanlder);\n\n      worker.checkEvent = function (e) {\n        if (e.data && e.data.assetRequest) {\n          return true;\n        }\n        return false;\n      };\n\n      var interceptListeners = [];\n      function popCallback(listener) {\n        if (!interceptListeners) return null;\n        for (var i = 0; i < interceptListeners.length; ++i) {\n          if (interceptListeners[i].arg === listener) {\n            var ret = interceptListeners[i].callback;\n            interceptListeners.splice(i, 1);\n            if (interceptListeners.length === 0)\n            interceptListeners = null;\n            return ret;\n          }\n        }\n        return null;\n      }\n\n      worker.addEventListenerWithIntercept = function (listener) {\n\n        var callbackFn = function callbackFn(ew) {\n          if (worker.checkEvent(ew))\n          return;\n\n          listener(ew);\n        };\n\n        if (!interceptListeners) interceptListeners = [];\n        interceptListeners.push({ arg: listener, callback: callbackFn });\n        worker.addEventListener('message', callbackFn, false);\n        return callbackFn;\n      };\n\n      worker.removeEventListenerWithIntercept = function (listener) {\n        var callbackFn = popCallback(listener);\n        if (callbackFn) {\n          worker.removeEventListener('message', callbackFn, false);\n        }\n      };\n\n      worker.clearAllEventListenerWithIntercept = function () {\n        if (!interceptListeners) return;\n        var copy = interceptListeners.concat();\n        for (var i = 0; i < copy.length; ++i) {\n          worker.removeEventListenerWithIntercept(copy[i].arg);\n        }\n      };\n\n      return worker;\n    };\n\n    module.exports = {\n      createWorker: createWorker,\n      initWorkerScript: initWorkerScript,\n      createWorkerWithIntercept: createWorkerWithIntercept,\n      clearWorkerDataURL: clearWorkerDataURL };\n\n\n\n  })();\n}","var _require = require('../../globals'),getResourceUrl = _require.getResourceUrl;var _require2 =\nrequire('../../compat'),getGlobal = _require2.getGlobal;\n\n/**\n                                                          * Initializes the wasm worker.\n                                                          * This function returns a promise that resolves with a wasm proxy.\n                                                          * The wasm proxy contains functions that were exported by the wasm instance.\n                                                          * Each one of these functions will return promises that resolve with the function's return value.\n                                                          *\n                                                          * To get the WebAssembly memory call `proxy.getBuffer()` which returns a promise that resolves with a ArrayBuffer value.\n                                                          * @param {String} wasmPath - relative path to the wasm file.\n                                                          * @returns {Promise} - resolves with the wasm proxy.\n                                                          */\nexport function loadWasmWorker(wasmPath) {\n  var CHANNEL_CACHE = {};\n  var workerFileUrl = getResourceUrl('wasm.worker.js');\n  // Enable this for testing.\n  // Autodesk.Viewing.Private.ENABLE_INLINE_WORKER = false;\n\n  return new Promise(function (resolve, reject) {\n    // Create a new wasm worker\n    initUrlBlob(workerFileUrl).then(function (workerUrl) {\n      var worker = new Worker(workerUrl);\n      // Create an object to later interact with\n      var proxy = {};\n      // Get the wasm resource url\n      var wasmFileUrl = getResourceUrl(wasmPath);\n      // Initialize the Wasm file in the worker.\n      worker.postMessage({ eventType: 'INITIALIZE', eventData: wasmFileUrl });\n      worker.addEventListener('message', function (event) {\n        var eventType = event.data.eventType;\n        // Generate the proxy.\n        if (eventType === 'INITIALIZED') {\n          var methods = event.data.eventData;\n          // Generate the proxy methods\n          methods.forEach(function (method) {\n            proxy[method] = function () {var _arguments = arguments;\n              return setupProxyMethod(method, worker, function (port) {\n                port.postMessage({\n                  eventData: {\n                    method: method,\n                    arguments: Array.from(_arguments) // arguments is not an array\n                  } });\n\n              });\n            };\n          });\n          // create a getBuffer proxy function that will return a promise that resolves with the webassembly memory buffer.\n          var method = 'getBuffer';\n          proxy[method] = function () {\n            return setupProxyMethod(method, worker, function (port) {\n              port.postMessage({\n                eventType: 'GET_BUFFER' });\n\n            });\n          };\n          // Resolves with the proxy.\n          resolve(proxy);\n          return;\n        }\n      });\n\n      worker.addEventListener('error', function (error) {\n        reject(error);\n      });\n    });\n  });\n\n  /**\n       * Returns promise that resolves with the correct url to the passed in file.\n       * @param {String} fileUrl - url path to the file.\n       * @returns {Promise} - Promise that resolves with the correct blob url or the original file url if inline workers are disabled.\n       */\n  function initUrlBlob(fileUrl) {\n    var avp = Autodesk.Viewing.Private;\n    return new Promise(function (resolve) {\n      if (avp.ENABLE_INLINE_WORKER) {\n        var xhr = new XMLHttpRequest();\n\n        xhr.open('GET', fileUrl, true);\n        xhr.withCredentials = false;\n\n        xhr.onload = function () {\n          var _window = getGlobal();\n          var blob;\n          _window.URL = _window.URL || _window.webkitURL;\n\n          try {\n            blob = new Blob([xhr.responseText], { type: 'application/javascript' });\n          } catch (e) {\n            // Backward compatibility.\n            var builder = new BlobBuilder();\n            builder.append(xhr.responseText);\n            blob = builder.getBlob();\n          }\n          resolve(URL.createObjectURL(blob));\n        };\n        xhr.send();\n      } else {\n        resolve(fileUrl);\n      }\n    });\n  }\n\n  /**\n     * Returns a promise for a proxy method.\n     * @param {String} method - Proxy method name\n     * @param {Worker} worker - Wasm Worker instance\n     * @param {function} portCb - recieves the MessageChannel port as a parameter\n     * @return {Promise} - returns a new promise that resolves with the proxy methods return value\n     */\n  function setupProxyMethod(method, worker, portCb) {\n    return new Promise(function (resolve, reject) {\n      var channelInfo = getChannelInfo(method, worker, CHANNEL_CACHE);\n      var channel = channelInfo.channel;\n      channelInfo.inUse = true;\n      portCb(channel.port1);\n\n      channel.port1.onmessage = function (event) {\n        channelInfo.inUse = false;\n\n        var eventType = event.data.eventType;\n        var eventData = event.data.eventData;\n        if (eventType === 'ERROR') {\n          reject(eventData);\n        } else {\n          resolve(eventData);\n        }\n\n        cleanupChannelInfo(channelInfo, CHANNEL_CACHE[method]);\n      };\n    });\n  }\n\n  /**\n     * Returns a cached or a new channelInfo object.\n     * @param {String} method - Proxy method name\n     * @param {Worker} worker - Wasm Worker instance\n     * @returns {Object} - returns the channelInfo object. {channel: {MessageChannel}, inUse: {Boolean}}\n     */\n  function getChannelInfo(method, worker) {\n    var channelInfo;\n    var createNewChannel;\n    if (CHANNEL_CACHE && CHANNEL_CACHE.hasOwnProperty(method)) {\n      // Check if the first channel is use\n      channelInfo = CHANNEL_CACHE[method][0];\n      createNewChannel = channelInfo.inUse;\n    } else {\n      CHANNEL_CACHE[method] = [];\n      createNewChannel = true;\n    }\n\n    if (createNewChannel) {\n      channelInfo = { channel: new MessageChannel(), inUse: false };\n      CHANNEL_CACHE[method].push(channelInfo);\n      worker.postMessage(\n      { eventType: 'SET_CHANNEL_PORT', eventData: { method: method, port: channelInfo.channel.port2 } },\n      [channelInfo.channel.port2]);\n\n    }\n    // Initialize the port with the worker\n    return channelInfo;\n  }\n\n  /**\n     * Removes the supplied channelInfo from the channel cache.\n     * This method will keep the first channel in the cache which will be reused by other calls.\n     * @param {Object} channelInfo - channelInfo object containing information about the channel\n     * @param {ChannelInfo[]} cachedMethodChannels - An array of ChannelInfo objects for the specific method.     \n     * @returns {Boolean} - true if the channel was removed from the cache.\n     */\n  function cleanupChannelInfo(channelInfo, cachedMethodChannels) {\n    // We want to keep the first channel open so that it can be reused by other calls.\n    for (var i = 1; i < cachedMethodChannels.length; i++) {\n      var storedInfo = cachedMethodChannels[i];\n      var currChannel = storedInfo.channel;\n      var channelToClose = channelInfo.channel;\n      if (currChannel === channelToClose) {\n        cachedMethodChannels.splice(i, 1);\n        return true;\n      }\n    }\n    return false;\n  }\n}","\n/**\n * Error code constants\n * These constants will be used in {@link Callbacks#onGenericError} functions.\n *\n * @namespace Autodesk.Viewing.ErrorCodes\n */\nexport var ErrorCodes = {\n  /** \n                           * An unknown failure has occurred. \n                           * @constant\n                           * @memberof Autodesk.Viewing.ErrorCodes\n                           * @default\n                           */\n  UNKNOWN_FAILURE: 1,\n\n  /** \n                       * Bad data (corrupted or malformed) was encountered. \n                       * @constant\n                       * @memberof Autodesk.Viewing.ErrorCodes\n                       * @default\n                       */\n  BAD_DATA: 2,\n\n  /** \n                * A network failure was encountered. \n                * @constant\n                * @memberof Autodesk.Viewing.ErrorCodes\n                * @default\n                */\n  NETWORK_FAILURE: 3,\n\n  /** \n                       * Access was denied to a network resource (HTTP 403)\n                       * @constant\n                       * @memberof Autodesk.Viewing.ErrorCodes\n                       * @default\n                       */\n  NETWORK_ACCESS_DENIED: 4,\n\n  /** \n                             * A network resource could not be found (HTTP 404)\n                             * @constant\n                             * @memberof Autodesk.Viewing.ErrorCodes\n                             * @default\n                             */\n  NETWORK_FILE_NOT_FOUND: 5,\n\n  /** \n                              * A server error was returned when accessing a network resource (HTTP 5xx)\n                              * @constant\n                              * @memberof Autodesk.Viewing.ErrorCodes\n                              * @default\n                              */\n  NETWORK_SERVER_ERROR: 6,\n\n  /** \n                            * An unhandled response code was returned when accessing a network resource (HTTP 'everything else')\n                            * @constant\n                            * @memberof Autodesk.Viewing.ErrorCodes\n                            * @default\n                            */\n  NETWORK_UNHANDLED_RESPONSE_CODE: 7,\n\n  /** \n                                       * Browser error = webGL is not supported by the current browser\n                                       * @constant\n                                       * @memberof Autodesk.Viewing.ErrorCodes\n                                       * @default\n                                       */\n  BROWSER_WEBGL_NOT_SUPPORTED: 8,\n\n  /** \n                                   * There is nothing viewable in the fetched document \n                                   * @constant\n                                   * @memberof Autodesk.Viewing.ErrorCodes\n                                   * @default\n                                   */\n  BAD_DATA_NO_VIEWABLE_CONTENT: 9,\n\n  /** \n                                    * Browser error = webGL is supported, but not enabled \n                                    * @constant\n                                    * @memberof Autodesk.Viewing.ErrorCodes\n                                    * @default\n                                    */\n  BROWSER_WEBGL_DISABLED: 10,\n\n  /**\n                               * There is no geometry in loaded model\n                               * @constant\n                               * @memberof Autodesk.Viewing.ErrorCodes\n                               * @default\n                               */\n  BAD_DATA_MODEL_IS_EMPTY: 11,\n\n  /** \n                                * Collaboration server error\n                                * @constant\n                                * @memberof Autodesk.Viewing.ErrorCodes\n                                * @default\n                                */\n  RTC_ERROR: 12,\n\n  /** \n                  * The extension of the loaded file is not supported \n                  * @constant\n                  * @memberof Autodesk.Viewing.ErrorCodes\n                  * @default\n                  */\n  UNSUPORTED_FILE_EXTENSION: 13,\n\n  /** \n                                  * Viewer error: wrong or forbidden usage of the viewer\n                                  * @constant\n                                  * @memberof Autodesk.Viewing.ErrorCodes\n                                  * @default\n                                  */\n  VIEWER_INTERNAL_ERROR: 14,\n\n  /** \n                              * WebGL error while loading a model, typically due to IE11 limitations\n                              * @constant\n                              * @memberof Autodesk.Viewing.ErrorCodes \n                              * @default\n                              */\n  WEBGL_LOST_CONTEXT: 15,\n\n  LOAD_CANCELED: 16 };\n\n\nexport function errorCodeString(errorCode) {\n  return \"ErrorCode:\" + errorCode + \".\";\n}\n\nexport function getErrorCode(networkStatus)\n{\n  if (networkStatus === 403 || networkStatus === 401)\n  {\n    return ErrorCodes.NETWORK_ACCESS_DENIED;\n  } else\n  if (networkStatus === 404)\n  {\n    return ErrorCodes.NETWORK_FILE_NOT_FOUND;\n  } else\n  if (networkStatus >= 500)\n  {\n    return ErrorCodes.NETWORK_SERVER_ERROR;\n  }\n  return ErrorCodes.NETWORK_UNHANDLED_RESPONSE_CODE;\n}","import { logger } from \"../../logger/Logger\";\nimport { ErrorCodes } from \"./ErrorCodes\";\nimport { blobToJson } from '../lmvtk/common/StringUtils';\nimport { endpoint } from \"./endpoints\";\nimport { isNodeJS, getGlobal } from \"../../compat\";\nvar pako = require('pako');\n\nexport var ViewingService = {};\nViewingService.WORKER_REGISTER_FILE_PORT = \"REGISTER_FILE_PORT\";\nViewingService.WORKER_READ_FILE = \"READ_FILE\";\n\nvar warnedGzip = false;\n\n// Simplify Unix style file path. For example, turn '/a/./b/../../c/' into \"/c\".\n// Required to deal with OSS crappy URNs where there are embedded '..'.\nfunction simplifyPath(path) {\n\n  var elements = path.split('/');\n  if (elements.length == 0)\n  return path;\n\n  var stack = [];\n  for (var index = 0; index < elements.length; ++index) {\n    var c = elements[index];\n    if (c === '.') {\n      continue;\n    }if (c === '..' && stack.length) {\n      stack.pop();\n    } else {\n      stack.push(c);\n    }\n  }\n\n  // Great, the path commits suicide.\n  if (stack.length == 0)\n  return '';\n\n  return stack.join(\"/\");\n}\n\n//Maps a relative resource path (like a pack file or texture)\n//to an absolute URL. If absoluteBasePath is specified, it is\n//used to construct the absolute URL, otherwise the window location\n//is used.\nexport function pathToURL(path, absoluteBasePath) {\n\n  if (path.indexOf(\"://\") !== -1 ||\n  path.indexOf(\"urn:\") === 0) {\n    return path;\n  }\n\n  if (absoluteBasePath) {\n    return absoluteBasePath + path;\n  }\n\n  if (typeof window === \"undefined\")\n  return path;\n\n  var _window = getGlobal();\n  var rootRelPath = _window.location.pathname;\n  //chop off the index.html part\n  var lastSlash = rootRelPath.lastIndexOf(\"/\");\n  rootRelPath = rootRelPath.substr(0, lastSlash + 1);\n  var absPath = _window.location.protocol + \"//\" + _window.location.host + rootRelPath + path;\n  return absPath;\n}\n\n\nViewingService.simplifyPath = simplifyPath;\n\nexport function textToArrayBuffer(textBuffer, startOffset) {\n  var len = textBuffer.length - startOffset;\n  var arrayBuffer = new ArrayBuffer(len);\n  var ui8a = new Uint8Array(arrayBuffer, 0);\n  for (var i = 0, j = startOffset; i < len; i++, j++) {\n    ui8a[i] = textBuffer.charCodeAt(j) & 0xff;}\n  return ui8a;\n}\n\n\nViewingService.OSS_PREFIX = \"urn:adsk.objects:os.object:\";\n\n/**\n                                                            * Construct full URL given a potentially partial viewing service \"urn:\" prefixed resource\n                                                            * @returns {string}\n                                                            */\nViewingService.generateUrl = function (baseUrl, api, path, apiData) {\n\n  path = path || \"\";\n\n  //NODE\n  if (isNodeJS() && !isRemotePath(baseUrl, path)) {\n    return path;\n  }\n\n  path = simplifyPath(path);\n\n  //V2 only accepts URL encoded paths\n  var urnidx = path.indexOf(\"urn:\");\n  var qidx = path.indexOf(\"?\");\n  if (urnidx != -1) {\n    if (qidx !== -1) {\n      //TODO: not sure this will happen, queryParams are normally\n      //passed in separately in the options object\n      path = path.slice(0, urnidx) + encodeURIComponent(path.slice(urnidx, qidx)) + path.slice(qidx);\n    } else {\n      path = path.slice(0, urnidx) + encodeURIComponent(path.slice(urnidx));\n    }\n  } else {\n    path = encodeURI(path);\n  }\n\n  //Check if it's a viewing service item path\n  //Public/static content will not have the urn: prefix.\n  //So URL construction is a no-op\n  if (!api || decodeURIComponent(path).indexOf('urn:') !== 0) {\n    if (isRemotePath(null, path))\n    return path;else\n\n    return baseUrl + path;\n  }\n\n  //Remove \"urn:\" prefix when getting URN-based stuff (manifests and thumbnails)\n  if (api !== 'items') {\n    path = path.substr(6);\n  }\n\n  switch (api) {\n    case \"items\":return endpoint.getItemApi(baseUrl, path, apiData);\n    case \"bubbles\":return endpoint.getManifestApi(baseUrl, path, apiData);\n    case \"thumbnails\":return endpoint.getThumbnailApi(baseUrl, path, apiData);}\n\n};\n\nfunction isRemotePath(baseUrl, path) {\n  if (path.indexOf(\"file://\") !== -1)\n  return false;\n  if (path.indexOf(\"://\") !== -1)\n  return true;\n  if (baseUrl)\n  return true;\n}\n\n\n//Conditional GET request implementation for node vs. browser\nif (isNodeJS()) {\n\n  (function () {\n\n    var fs = require('fs');\n    var zlib = require('zlib');\n    var https = require('https');\n    var http = require('http');\n    var urllib = require('url');\n\n    var httpsAgent = new https.Agent({\n      keepAlive: true,\n      keepAliveMsecs: 100,\n      maxSockets: 10 });\n\n    var httpAgent = new http.Agent({\n      keepAlive: true,\n      keepAliveMsecs: 100,\n      maxSockets: 10 });\n\n\n\n    var forgeAgent = new https.Agent({ maxSockets: 10 });\n\n    function loadLocalFile(url, onSuccess, onFailure, options) {\n\n      if (url.indexOf(\"file://\") === 0)\n      url = url.substr(7);\n\n      function postProcess(data) {\n        if (options.responseType === \"json\") {\n          try {\n            return JSON.parse(data.toString(\"utf8\"));\n          } catch (e) {\n            onFailure(e);\n          }\n        }\n        return data;\n      }\n\n      //Always use async on Node\n      fs.readFile(url, function (error, data) {\n        if (error) {\n          onFailure(0, 0, { httpStatusText: error, url: url });\n        } else {\n          if (data[0] === 31 && data[1] === 139) {\n            zlib.gunzip(data, null, function (error, data) {\n              if (error)\n              onFailure(0, 0, { httpStatusText: error, url: url });else\n              {\n                data = postProcess(data);\n                if (options.ondata)\n                options.ondata(data);\n                onSuccess(data);\n              }\n            });\n          } else {\n            data = postProcess(data);\n            if (options.ondata)\n            options.ondata(data);\n            onSuccess(data);\n          }\n        }\n      });\n    }\n\n    function needsGunzip(res, pathname) {\n\n      if (res.headers['content-encoding'] === 'gzip')\n      return true;\n\n      //These SVF related files come pre-gzipped\n      //regardless of content-encoding header\n\n      if (pathname.endsWith(\".json.gz\"))\n      return true;\n\n      if (pathname.endsWith(\"FragmentList.pack\"))\n      return true;\n\n      if (pathname.endsWith(\"LightList.bin\"))\n      return true;\n\n      if (pathname.endsWith(\"CameraList.bin\"))\n      return true;\n\n      if (pathname.endsWith(\"CameraDefinitions.bin\"))\n      return true;\n\n      if (pathname.endsWith(\"LightDefinitions.bin\"))\n      return true;\n\n      return false;\n    }\n\n\n    /**\n       *  Performs a GET/HEAD request to Viewing Service. (Node.js specific implementation)\n       *\n       * @param {string} viewingServiceBaseUrl - The base url for the viewing service.\n       * @param {string} api - The api to call in the viewing service.\n       *  @param {string} url - The url for the request.\n       *  @param {function} onSuccess - A function that takes a single parameter that represents the response\n       *                                returned if the request is successful.\n       *  @param {function} onFailure - A function that takes an integer status code, and a string status, which together represent\n       *                                the response returned if the request is unsuccessful, and a third data argument, which\n       *                                has more information about the failure.  The data is a dictionary that minimally includes\n       *                                the url, and an exception if one was raised.\n       *  @param {Object=} [options] - A dictionary of options that can include:\n       *                               headers - A dictionary representing the additional headers to add.\n       *                               queryParams - A string representing the query parameters\n       *                               responseType - A string representing the response type for this request.\n       *                               {boolean} [encodeUrn] - when true, encodes the document urn if found.\n       *                               {boolean} [noBody] - when true, will perform a HEAD request\n       */\n    ViewingService.rawGet = function (viewingServiceBaseUrl, api, url, onSuccess, onFailure, options) {\n\n      options = options || {};\n\n      url = ViewingService.generateUrl(viewingServiceBaseUrl, api, url);\n\n      if (!isRemotePath(viewingServiceBaseUrl, url)) {\n        loadLocalFile(url, onSuccess, onFailure, options);\n        return;\n      }\n\n      if (options.queryParams) {\n        var concatSymbol = url.indexOf('?') === -1 ? '?' : '&';\n        url = url + concatSymbol + options.queryParams;\n      }\n\n      var parsed = urllib.parse(url);\n\n      var req = {\n        host: parsed.hostname,\n        port: parsed.port,\n        method: options.method || \"GET\",\n        path: parsed.path,\n        headers: {},\n        retryCount: 0,\n        agent: parsed.protocol === \"https:\" ? httpsAgent : httpAgent };\n\n\n      //Don't overload derivative service with requests\n      if (req.host.endsWith(\".api.autodesk.com\") && (\n      req.path.startsWith(\"/derivativeservice\") || req.path.startsWith(\"/modelderivative\"))) {\n        req.agent = forgeAgent;\n      }\n\n      if (options.headers) {\n        for (var p in options.headers) {\n          req.headers[p] = options.headers[p];\n        }\n      }\n\n      if (!req.headers['accept-encoding']) {\n        req.headers['accept-encoding'] = 'gzip, deflate';\n      }\n\n      if (options.range) {\n        req.headers[\"Range\"] = \"bytes=\" + options.range.min + \"-\" + options.range.max;\n      }\n\n      //Undo hack used to make streaming receive work on browser XHR -- the hack\n      //involves processing the response as text, so responseType is set to \"\".\n      if (options.ondata || options.onprogress) {\n        options.responseType = \"arraybuffer\";\n      }\n\n      var request = (parsed.protocol === \"https:\" ? https : http).request(req, function (res) {\n\n        var hasError = !(res.statusCode >= 200 && res.statusCode < 400);\n\n        //Pipe through gunzip if needed\n        var stream = res;\n        if (!hasError && needsGunzip(res, parsed.pathname) && !options.skipDecompress) {\n          stream = res.pipe(zlib.createGunzip());\n        }\n\n        //Decode as UTF8 string if needed\n        if (options.responseType === \"json\" || options.responseType === \"text\" || !options.responseType)\n        stream.setEncoding('utf8');\n\n        var chunks = [];\n        var receiveBuffer = Buffer.allocUnsafe(65536);\n        var receivedLen = 0;\n        stream.on('data', function (chunk) {\n\n          //The onprogress callback is special in that it\n          //want us to accumulate the data as we receive it, and it only looks at it.\n          if (options.onprogress) {\n\n            if (chunk.length + receivedLen > receiveBuffer.length) {\n              var nb = Buffer.allocUnsafe(0 | Math.ceil(receiveBuffer.length * 1.5));\n              receiveBuffer.copy(nb, 0, 0, receivedLen);\n              receiveBuffer = nb;\n            }\n\n            chunk.copy(receiveBuffer, receivedLen, 0, chunk.length);\n            receivedLen += chunk.length;\n            var abort = options.onprogress(receiveBuffer, receivedLen);\n            if (abort)\n            request.abort();\n            return;\n          } else {\n            chunks.push(chunk);\n          }\n\n          if (options.ondata) {\n            options.ondata(chunk);\n          }\n\n        });\n\n        stream.on('end', function () {\n\n          if (res.statusCode >= 200 && res.statusCode < 400) {\n\n            if (options.responseType === \"json\") {\n              var jsobj = JSON.parse(chunks.join(''));\n              onSuccess(jsobj);\n              return;\n            }\n\n            if (options.responseType === \"text\" || options.responseType === \"\") {\n              var str = chunks.join('');\n              onSuccess(str);\n              return;\n            }\n\n            var buf = options.onprogress ? receiveBuffer : Buffer.concat(chunks);\n\n            if (!options.skipDecompress && buf[0] === 31 && buf[1] === 139) {\n\n              logger.warn(\"An LMV resource (\" + url + \") was double compressed, or Content-Encoding header missing\");\n\n              try {\n                buf = zlib.gunzipSync(buf);\n                receivedLen = buf.length;\n              } catch (err) {\n                onFailure(ErrorCodes.BAD_DATA,\n                \"Malformed data received when requesting file\",\n                { \"url\": url, \"exception\": err.toString(), \"stack\": err.stack });\n              }\n            }\n\n            if (request.status === 200 && options.range) {\n              //If we requested a range, but the entire content was returned,\n              //make sure to give back just the requested subset to the caller\n              buf = new Uint8Array(buf, options.range.min, options.range.max - options.range.min);\n            }\n\n            onSuccess(buf, receivedLen);\n\n          } else {\n\n            if (onFailure)\n            onFailure(res.statusCode, res.statusMessage, { url: url });\n\n          }\n        });\n\n      });\n\n      request.on(\"error\", function (error) {\n        if (onFailure)\n        onFailure(error.code, error.message, { url: url });\n      });\n\n      if (options.postData) {\n        request.write(options.postData);\n      }\n\n      request.end();\n\n    };\n\n  })();\n\n} else {\n\n  var Pend = require(\"pend\");\n  var xhrThrottle = new Pend();\n  xhrThrottle.max = 25;\n\n  var protocolPortMap = {};\n  var pendingPortRequest = {};\n  var pendingRequestChannelMap = {};\n\n  /**\n                                      * Explain how the protocol handler working in general here\n                                      * Why adding this function:\n                                      * In Emscripten it has a virtual file system, it provide us ability to run wasm loader to load \n                                      * native DWF models, and write the output in that virtual file system\n                                      * \n                                      * While, we run the extraction code in the worker, it makes us hard to read the data back since only \n                                      * the worker thread can read that data. But we need put the resource in the bubble data to indicate that\n                                      * this data is from Emscripten Virtual File System, the urn is not an http(s) or file.\n                                      * \n                                      * It makes the whole process complex, we don't want to change the existing data schema(bubble) so we need\n                                      * to add a support in the Xhr.js to support the this resource request.\n                                      * \n                                      * The idea here is we register a MessagePort in the main thread, and once we create a worker which need to\n                                      * load the special resource, it will check whether this special protocol has a handler or not. If it does,\n                                      * it will let the handler to do the heavy lifting. \n                                      * \n                                      * In the WorkerCreator, it will create new  MessageChannel between new created worker and the main thread,\n                                      * it became the bridge to get the actual resource from the loader who registered the protocol\n                                      * \n                                      */\n  ViewingService.registerProtocolPort = function (protocol, port) {\n    if (/^(http(s)?|file):/gi.test(protocol)) {\n      // for peace of mind: security\n      console.warn(\"http(s) or file protocol were not allowed to be handled\");\n      return;\n    }\n\n    if (!port) {\n      // means we need to remove if there is a port open\n      if (protocolPortMap[protocol] && protocolPortMap[protocol] instanceof MessagePort) {\n        protocolPortMap[protocol].onmessage = undefined;\n        protocolPortMap[protocol] = undefined;\n      }\n\n      return;\n    }\n\n    protocolPortMap[protocol] = port;\n\n    port.onmessage = function (message) {\n      var url = message.data.url;\n      if (pendingPortRequest[url]) {\n        var pendingHandler = pendingPortRequest[url];\n\n        if (message.data.error) {\n          pendingHandler.onFailureWrapped(ErrorCodes.BAD_DATA,\n          \"Malformed data received when requesting file\",\n          { \"url\": url, \"exception\": message.data.error.message, \"stack\": message.data.error.stack });\n        } else {\n          // In the worker whom is root when request the data\n          var rawbuf = message.data.buffer;\n          pendingPortRequest[url] = undefined;\n\n          if (rawbuf[0] === 31 && rawbuf[1] === 139 && url.match(/(.f2d|.gz)$/gi)) {\n            try {\n              rawbuf = pako.ungzip(rawbuf);\n              if (pendingHandler.options && pendingHandler.options.ondata) {\n                pendingHandler.options.ondata(rawbuf);\n              }\n              pendingHandler.onSuccessWrapped(rawbuf);\n            } catch (err) {\n              pendingHandler.onFailureWrapped(ErrorCodes.BAD_DATA,\n              \"Malformed data received when requesting file\",\n              { \"url\": url, \"exception\": err.toString(), \"stack\": err.stack });\n            }\n          } else {\n            pendingHandler.onSuccessWrapped(rawbuf);\n          }\n        }\n      } else if (pendingRequestChannelMap[url]) {\n        // For the middle man\n        var transfer = [];\n        if (message.data && message.data.buffer && message.data.buffer.buffer instanceof ArrayBuffer) {\n          transfer.push(message.data.buffer.buffer);\n        }\n        pendingRequestChannelMap[url].postMessage(message.data, transfer);\n        pendingRequestChannelMap[url] = undefined;\n      }\n    };\n  };\n\n  ViewingService.handlerProtocol = function (protocol, url, onSuccessWrapped, onFailureWrapped, options) {\n    var port = protocolPortMap[protocol];\n    pendingPortRequest[url] = {\n      onSuccessWrapped: onSuccessWrapped,\n      onFailureWrapped: onFailureWrapped,\n      options: options };\n\n\n    port.postMessage({\n      operation: ViewingService.WORKER_READ_FILE,\n      url: url });\n\n\n  };\n\n  ViewingService.forwardProtocolHandlerToWorker = function (worker) {\n    var map = {};\n\n    // create the middle man who connect between the worker who need to request the resource\n    // and the main thread\n    var channel = new MessageChannel();\n    channel.port1.onmessage = function (message) {\n      var url = new URL(message.data.url);\n      protocolPortMap[url.protocol].postMessage(message.data);\n      pendingRequestChannelMap[url] = channel.port1;\n    };\n\n    for (var key in protocolPortMap) {\n      if (protocolPortMap[key] instanceof MessagePort) {\n        map[key] = channel.port2;\n      }\n    }\n\n    worker.doOperation({\n      operation: ViewingService.WORKER_REGISTER_FILE_PORT,\n      protocolPortMap: map },\n    [channel.port2]);\n  };\n\n  ViewingService.rawGet = function (viewingServiceBaseUrl, api, url, onSuccess, onFailure, options) {\n    xhrThrottle.go(function (pendCB) {\n      var onFailureWrapped = function onFailureWrapped() {\n        pendCB();for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {args[_key] = arguments[_key];}\n        onFailure && onFailure.apply(onFailure, args);\n      };\n\n      var onSuccessWrapped = function onSuccessWrapped() {\n        pendCB();for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {args[_key2] = arguments[_key2];}\n        onSuccess && onSuccess.apply(onSuccess, args);\n      };\n\n      var protocolMatch = /^(\\w+:)\\/\\//gi.exec(url);\n      // if there is a special handler for this request, delegate this request to the handler\n      if (protocolMatch && protocolMatch.length == 2 && protocolPortMap[protocolMatch[1]]) {\n        ViewingService.handlerProtocol(protocolMatch[1], url, onSuccessWrapped, onFailureWrapped, options);\n      } else {\n        ViewingService._rawGet(viewingServiceBaseUrl, api, url, onSuccessWrapped, onFailureWrapped, options);\n      }\n    });\n  };\n\n  /**\n      *  Performs a GET/HEAD request to Viewing Service.\n      *\n      * @param {string} viewingServiceBaseUrl - The base url for the viewing service.\n      * @param {string} api - The api to call in the viewing service.\n      *  @param {string} url - The url for the request.\n      *  @param {function} onSuccess - A function that takes a single parameter that represents the response\n      *                                returned if the request is successful.\n      *  @param {function} onFailure - A function that takes an integer status code, and a string status, which together represent\n      *                                the response returned if the request is unsuccessful, and a third data argument, which\n      *                                has more information about the failure.  The data is a dictionary that minimally includes\n      *                                the url, and an exception if one was raised.\n      *  @param {Object=} [options] - A dictionary of options that can include:\n      *                               headers - A dictionary representing the additional headers to add.\n      *                               queryParams - A string representing the query parameters\n      *                               responseType - A string representing the response type for this request.\n      *                               {boolean} [encodeUrn] - when true, encodes the document urn if found.\n      *                               {boolean} [noBody] - when true, will perform a HEAD request\n      */\n  ViewingService._rawGet = function (viewingServiceBaseUrl, api, url, onSuccess, onFailure, options) {\n\n    options = options || {};\n\n    url = ViewingService.generateUrl(viewingServiceBaseUrl, api, url, options.apiData);\n\n    if (options.queryParams) {\n      var concatSymbol = url.indexOf('?') === -1 ? '?' : '&';\n      url = url + concatSymbol + options.queryParams;\n    }\n\n    var request = new XMLHttpRequest();\n\n    function onError(e) {\n      if (onFailure)\n      onFailure(request.status, request.statusText, { url: url });\n    }\n\n    function fixJsonResponse(response) {\n      if (options.responseType === \"json\") {\n        try {\n          if (response instanceof Uint8Array) {\n            //This should only happen in the node.js case so we can do toString\n            //instead of using the LMV utf8 converter.\n            return blobToJson(response);\n          } else if (typeof response === \"string\") {\n            return JSON.parse(response);\n          }\n        } catch (e) {}\n      }\n      return response;\n    }\n\n    function onLoad(e) {\n      if (request.status >= 200 && request.status < 400) {\n\n        if (request.response &&\n        request.response instanceof ArrayBuffer) {\n\n          var rawbuf;\n          if (request.status === 200 && options.range) {\n            //If we requested a range, but the entire content was returned,\n            //make sure to give back just the requested subset to the caller\n            rawbuf = new Uint8Array(request.response, options.range.min, options.range.max - options.range.min);\n          } else {\n            rawbuf = new Uint8Array(request.response);\n          }\n\n          // It's possible that if the Content-Encoding header is set,\n          // the browser unzips the file by itself, so let's check if it did.\n          // Return raw buffer if skip decompress is true\n          if (!options.skipDecompress && rawbuf[0] === 31 && rawbuf[1] === 139) {\n            if (!warnedGzip) {\n              warnedGzip = true;\n              logger.warn(\"An LMV resource (\" + url + \") was not uncompressed by the browser. This hurts performance. Check the Content-Encoding header returned by the server and check whether you're getting double-compressed streams. The warning prints only once but it's likely the problem affects multiple resources.\");\n            }\n            try {\n              rawbuf = pako.ungzip(rawbuf);\n            } catch (err) {\n              onFailure(ErrorCodes.BAD_DATA,\n              \"Malformed data received when requesting file\",\n              { \"url\": url, \"exception\": err.toString(), \"stack\": err.stack });\n            }\n          }\n\n          onSuccess && onSuccess(fixJsonResponse(rawbuf));\n        } else\n        {\n          var res = request.response;\n          if (!res && (!options.responseType || options.responseType === \"text\"))\n          res = request.responseText;\n\n          onSuccess && onSuccess(fixJsonResponse(res));\n        }\n      } else\n      {\n        onError(e);\n      }\n    }\n\n    try {\n\n      var isAsync = options.hasOwnProperty('asynchronous') ? options.asynchronous : true;\n      request.open(options.method || (options.noBody ? 'HEAD' : 'GET'), url, isAsync);\n\n      if (options.hasOwnProperty('responseType')) {\n        request.responseType = options.responseType;\n      }\n\n      request.withCredentials = true;\n      if (options.hasOwnProperty(\"withCredentials\"))\n      request.withCredentials = options.withCredentials;\n\n      if (options.range) {\n        request.setRequestHeader(\"Range\", \"bytes=\" + options.range.min + \"-\" + options.range.max);\n      }\n\n      if (options.headers) {\n        for (var header in options.headers) {\n          request.setRequestHeader(header, options.headers[header]);\n\n          // Disable withCredentials if header is Authorization type\n          // NOTE: using withCredentials attaches cookie data to request\n          if (header.toLocaleLowerCase() === \"authorization\") {\n            request.withCredentials = false;\n          }\n        }\n      }\n\n      if (isAsync) {\n        request.onload = onLoad;\n        request.onerror = onError;\n        request.ontimeout = onError;\n\n        if (options.ondata || options.onprogress) {\n\n          //Set up incremental progress notification\n          //if needed. We have to do some magic in order\n          //to get the received data progressively.\n          //https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/Using_XMLHttpRequest\n          request.overrideMimeType('text/plain; charset=x-user-defined');\n          options._dlProgress = {\n            streamOffset: 0 };\n\n\n          request.onreadystatechange = function () {\n\n            if (request.readyState > 2 && request.status === 200) {\n\n              if (options.ondata) {\n\n                var textBuffer = request.responseText;\n\n                // No new data coming in.\n                if (options._dlProgress.streamOffset >= textBuffer.length)\n                return;\n\n                var arrayBuffer = textToArrayBuffer(textBuffer, options._dlProgress.streamOffset);\n\n                options._dlProgress.streamOffset = textBuffer.length;\n\n                options.ondata(arrayBuffer);\n\n              } else if (options.onprogress) {\n\n                var abort = options.onprogress(request.responseText);\n                if (abort)\n                request.abort();\n              }\n            }\n          };\n        }\n      }\n\n      request.send(options.postData);\n\n      if (!isAsync) {\n        onLoad();\n      }\n    }\n    catch (e) {\n      onFailure(request.status, request.statusText, { url: url, exception: e });\n    }\n  };\n\n} //rawGet conditionsl implementation\n\n// Create the default failure callback.\n//\nViewingService.defaultFailureCallback = function (httpStatus, httpStatusText, data) {\n  if (httpStatus == 403) {\n    this.raiseError(\n    ErrorCodes.NETWORK_ACCESS_DENIED,\n    \"Access denied to remote resource\",\n    { \"url\": data.url, \"httpStatus\": httpStatus, \"httpStatusText\": httpStatusText });\n  } else\n  if (httpStatus == 404) {\n    this.raiseError(\n    ErrorCodes.NETWORK_FILE_NOT_FOUND,\n    \"Remote resource not found\",\n    { \"url\": data.url, \"httpStatus\": httpStatus, \"httpStatusText\": httpStatusText });\n  } else\n  if (httpStatus >= 500 && httpStatus < 600) {\n    this.raiseError(\n    ErrorCodes.NETWORK_SERVER_ERROR,\n    \"Server error when accessing resource\",\n    { \"url\": data.url, \"httpStatus\": httpStatus, \"httpStatusText\": httpStatusText });\n  } else\n  if (data.exception) {\n    this.raiseError(\n    ErrorCodes.NETWORK_FAILURE,\n    \"Network failure\",\n    { \"url\": data.url, \"exception\": data.exception.toString(), \"stack\": data.exception.stack });\n  } else\n  {\n    this.raiseError(\n    ErrorCodes.NETWORK_UNHANDLED_RESPONSE_CODE,\n    \"Unhandled response code from server\",\n    { \"url\": data.url, \"httpStatus\": httpStatus, \"httpStatusText\": httpStatusText, data: data });\n  }\n};\n\n\n\nfunction copyOptions(loadContext, options) {\n\n  //Those are the usual defaults when called from the LMV worker\n\n  if (!options.hasOwnProperty(\"responseType\"))\n  options.responseType = \"arraybuffer\";\n\n  //Add options junk we got from the main thread context\n\n  if (!options.hasOwnProperty(\"withCredentials\"))\n  options.withCredentials = !!loadContext.auth;\n\n  options.headers = loadContext.headers;\n  options.queryParams = loadContext.queryParams;\n  options.endpoint = loadContext.endpoint;\n}\n\n//Utility function called from the web worker to set up the options for a get request,\n//then calling ViewingService.get internally\nViewingService.getItem = function (loadContext, url, onSuccess, onFailure, options) {\n\n  options = options || {};\n\n  copyOptions(loadContext, options);\n\n  //If the endpoint does not support range requests (Apigee), then convert\n  //the range to start/end URL parameters.\n  if (options.range && !loadContext.supportsRangeRequests) {\n\n    var rangeParam = \"start=\" + options.range.min + \"&end=\" + options.range.max;\n    if (options.queryParams) {\n      options.queryParams += \"&\" + rangeParam;\n    } else {\n      options.queryParams = rangeParam;\n    }\n\n    options.range = undefined;\n  }\n\n  ViewingService.rawGet(loadContext.endpoint, 'items', url, onSuccess, onFailure, options);\n\n};\n\n//Utility function called from the web worker to set up the options for a get request,\n//then calling ViewingService.get internally\nViewingService.getManifest = function (loadContext, url, onSuccess, onFailure, options) {\n\n  options = options || {};\n\n  if (!options.hasOwnProperty(\"responseType\"))\n  options.responseType = \"json\";\n\n  copyOptions(loadContext, options);\n\n  ViewingService.rawGet(loadContext.endpoint, 'bubbles', url, onSuccess, onFailure, options);\n\n};\n\n//Utility function called from the web worker to set up the options for a get request,\n//then calling ViewingService.get internally\nViewingService.getThumbnail = function (loadContext, url, onSuccess, onFailure, options) {\n\n  options = options || {};\n\n  copyOptions(loadContext, options);\n\n  var queryParams = options.queryParams || '';\n  var missingElements = [];\n  if (queryParams.indexOf('guid=') === -1 && options.guid) {\n    missingElements.push(\"guid=\" + encodeURIComponent(options.guid));\n  }\n  if (queryParams.indexOf('role=') === -1) {\n    var role = options.role || \"rendered\";\n    missingElements.push(\"role=\" + role);\n  }\n  if (queryParams.indexOf('width=') === -1) {\n    var sz = options.size || 400;\n    missingElements.push(\"width=\" + sz);\n  }\n  if (queryParams.indexOf('height=') === -1) {\n    var sz = options.size || 400;\n    missingElements.push(\"height=\" + sz);\n  }\n  if (queryParams.indexOf('acmsession=') === -1 && options.acmsession) {\n    missingElements.push(\"acmsession=\" + options.acmsession);\n  }\n  var thumbQueryParams = missingElements.join('&');\n\n  if (options.queryParams) {\n    options.queryParams = options.queryParams + '&' + thumbQueryParams;\n  } else {\n    options.queryParams = thumbQueryParams;\n  }\n\n  ViewingService.rawGet(loadContext.endpoint, 'thumbnails', url, onSuccess, onFailure, options);\n};\n\n\nViewingService.getACMSession = function (endpoint, acmProperties, onSuccess, onFailure) {\n\n  var acmHeaders = {};\n  var token;\n\n  for (var key in acmProperties) {\n\n    if (key === \"oauth2AccessToken\")\n    token = acmProperties[key];else\n\n    if (key.indexOf(\"x-ads-acm\") !== -1)\n    acmHeaders[key] = acmProperties[key];\n  }\n\n  // The value of this can be anything. Required for some arcane reasons.\n  acmHeaders.application = \"autodesk\";\n\n  var xhr = new XMLHttpRequest();\n  xhr.open(\"POST\", endpoint + '/oss-ext/v2/acmsessions', true);\n  xhr.setRequestHeader(\"Content-Type\", \"application/json\");\n  xhr.setRequestHeader(\"Authorization\", \"Bearer \" + token);\n  xhr.responseType = \"json\";\n\n  xhr.onload = function () {\n    if (xhr.status === 200 && xhr.response) {\n      // If the response is a string (e.g. from IE), need to parse it to an object first\n      var response = typeof xhr.response === 'string' ? JSON.parse(xhr.response) : xhr.response;\n\n      if (response && response.acmsession) {\n        onSuccess(response.acmsession);\n      } else\n      {\n        onFailure(xhr.status, \"Can't get acm session from response.\");\n      }\n\n    } else {\n      onFailure(xhr.status);\n    }\n  };\n\n  xhr.onerror = onFailure;\n  xhr.ontimeout = onFailure;\n  xhr.send(JSON.stringify(acmHeaders));\n\n  // \"application\" header is only required for OSS end point, and should not be passed\n  // with normal requests because this header is not in allowed header sets of APIGEE.\n  delete acmHeaders.application;\n\n};","\nimport { isNodeJS, getGlobal } from \"../../compat\";\nimport { getParameterByName } from \"../../globals\";\n\nvar _window = getGlobal();\n\nvar endp = {};\n\nvar CDN_ROOT = null;\nendp.ENDPOINT_API_DERIVATIVE_SERVICE_V2 = 'derivativeV2';\nendp.ENDPOINT_API_MODEL_DERIVATIVE_V2 = 'modelDerivativeV2'; // Forge\nendp.ENDPOINT_API_FLUENT = 'fluent';\nendp.ENDPOINT_API_D3S = 'D3S';\n\nvar _apis_data = {\n  derivativeV2: {\n    baseURL: '/derivativeservice/v2',\n    itemURL: '/derivativeservice/v2/derivatives/:derivativeurn',\n    manifestURL: '/derivativeservice/v2/manifest/:urn',\n    thumbnailsURL: '/derivativeservice/v2/thumbnails/:urn' },\n\n  derivativeV2_EU: {\n    baseURL: '/derivativeservice/v2/regions/eu',\n    itemURL: '/derivativeservice/v2/regions/eu/derivatives/:derivativeurn',\n    manifestURL: '/derivativeservice/v2/regions/eu/manifest/:urn',\n    thumbnailsURL: '/derivativeservice/v2/regions/eu/thumbnails/:urn' },\n\n  modelDerivativeV2: {\n    baseURL: '/modelderivative/v2/',\n    itemURL: '/modelderivative/v2/designdata/:urn/manifest/:derivativeurn',\n    manifestURL: '/modelderivative/v2/designdata/:urn/manifest',\n    thumbnailsURL: '/modelderivative/v2/designdata/:urn/thumbnail' },\n\n  fluent: {\n    baseURL: '/modeldata',\n    itemURL: '/modeldata/file/:derivativeurn',\n    manifestURL: '/modeldata/manifest/:urn',\n    thumbnailsURL: '/derivativeservice/v2/thumbnails/:urn',\n    cdnURL: '/cdn',\n    cdnWS: '/cdnws'\n    //cdnRedirectURL: '/cdnurl', //There is no separate CDN endpoint currently\n  },\n  D3S: {\n    baseURL: '/modeldata',\n    itemURL: '/modeldata/file/:derivativeurn',\n    manifestURL: '/modeldata/manifest/:urn',\n    thumbnailsURL: '/derivativeservice/v2/thumbnails/:urn',\n    cdnURL: '/cdn',\n    cdnWS: '/cdnws' },\n\n  D3S_EU: {\n    baseURL: '/modeldata',\n    itemURL: '/modeldata/file/:derivativeurn',\n    manifestURL: '/modeldata/manifest/:urn',\n    thumbnailsURL: '/derivativeservice/v2/regions/eu/thumbnails/:urn',\n    cdnURL: '/cdn',\n    cdnWS: '/cdnws' } };\n\n\n\nvar _endpoint = '';\nvar _api = endp.ENDPOINT_API_DERIVATIVE_SERVICE_V2;\nvar _useCredentials = false;\nvar _useCookie = false;\nvar _acmSession = '';\n\nendp.HTTP_REQUEST_HEADERS = {};\nendp.queryParams = {};\n\n/**\r\n                        * Sets the endpoint and api to be used to create REST API request strings.\r\n                        * @param {string} endpoint\r\n                        * @param {string} [api] - Possible values are derivativeV2, modelDerivativeV2\r\n                        */\nendp.setEndpointAndApi = function (endpoint, api) {\n  if (endpoint) {\n    _endpoint = endpoint;\n  }\n  if (api) {\n    _api = api;\n  }\n};\n\n/**\r\n    * Returns the endpoint plus the api used to create REST API request strings.\r\n    * Example: \"developer.api.autodesk.com/modelderivative/v2\"\r\n    * @returns {string}\r\n    */\nendp.getEndpointAndApi = function () {\n  return _endpoint + _apis_data[_api].baseURL;\n};\n\n/**\r\n    * Returns the endpoint used to create REST API request strings.\r\n    * Examples: \"developer.api.autodesk.com\"\r\n    * @returns {string}\r\n    */\nendp.getApiEndpoint = function () {\n  return _endpoint;\n};\n\n/**\r\n    * @private\r\n    * @returns {string}\r\n    */\nendp.getApiFlavor = function () {\n  return _api;\n};\n\n/**\r\n    * Returns the default shared resource CDN location.\r\n    * For best performance (and to not overload our servers), this should\r\n    * be replaced by a direct CloudFront url during initialization, by\r\n    * calling the cdnRedirectUrl and looking at the result.\r\n    */\nendp.getCdnUrl = function () {\n  return CDN_ROOT || (_endpoint ? _endpoint + _apis_data[_api].cdnURL : undefined);\n};\n\nendp.getCdnWebSocketEndpoint = function () {\n  return _endpoint + (_apis_data[_api].cdnWS || '');\n};\n\nendp.setCdnUrl = function (url) {\n  CDN_ROOT = url;\n};\n\nendp.getCdnRedirectUrl = function () {\n  var redirect = _apis_data[_api].cdnRedirectURL;\n  if (!redirect)\n  return null;\n  return _endpoint + redirect;\n};\n\nendp.setAcmSession = function (value) {\n  _acmSession = value;\n};\n\nendp.getAcmSession = function () {\n  return _acmSession;\n};\n\n/**\r\n    * Returns a REST API request strings to be used to get the manifest of the provided urn.\r\n    * Example: \"developer.api.autodesk.com/modelderivative/v2/designdata/:urn/manifest\"\r\n    * @param {string | null} endpoint - When provided is used instead of the globally set endpoint.\r\n    * @param {string} urn\r\n    * @param {string} api - When provided is used instead of the globally set API flavor\r\n    * @returns {string}\r\n    */\nendp.getManifestApi = function (endpoint, urn, api) {\n  var url = endpoint || _endpoint;\n  api = api || _api;\n  url += _apis_data[api].manifestURL;\n  // If urn is not provided we return same string that before for backward compatibility.\n  urn = urn || '';\n  url = url.replace(':urn', urn);\n  return url;\n};\n\n/**\r\n    * Returns a REST API request strings to be used to get a derivative urn.\r\n    * Example: \"developer.api.autodesk.com/modelderivative/v2/designdata/:urn/manifest/:derivativeUrn\"\r\n    * @param {string | null} endpoint - When provided is used instead of the globally set API endpoint.\r\n    * @param {string} derivativeUrn\r\n    * @param {string} api - When provided is used instead of the globally set API flavor\r\n    * @returns {string}\r\n    */\nendp.getItemApi = function (endpoint, derivativeUrn, api) {\n  var theApi = api || _api;\n  var itemApi = (endpoint || _endpoint) + _apis_data[theApi].itemURL;\n  // If urn is not provided we return same string that before for backward compatibility.\n  derivativeUrn = derivativeUrn || '';\n  var decodedUrn = decodeURIComponent(derivativeUrn);\n\n  // Extract svf urn from item urn, needed when using model derivative.\n  if (itemApi.indexOf(':urn') !== -1) {\n    var parts = decodedUrn.split('/');\n    var urn = parts[0] || '';\n    urn = urn.split(':');\n    urn = urn[urn.length - 1] || '';\n\n    itemApi = itemApi.replace(':urn', urn);\n  }\n\n  if (theApi === endp.ENDPOINT_API_MODEL_DERIVATIVE_V2) {\n    derivativeUrn = encodeURIComponent(decodedUrn);\n  }\n\n  itemApi = itemApi.replace(':derivativeurn', derivativeUrn);\n\n  return itemApi;\n};\n\n/**\r\n    * Returns a REST API request strings to be used to get the thumbnail for a specific urn.\r\n    * Example: \"developer.api.autodesk.com/modelderivative/v2/designdata/:urn/thumbnail\"\r\n    * @param {string | null} endpoint - When provided is used instead of the globally set endpoint.\r\n    * @param {string} urn\r\n    * @param {string} api - When provided is used instead of the globally set API flavor\r\n    * @returns {string}\r\n    */\nendp.getThumbnailApi = function (endpoint, urn, api) {\n  var thumbnailApi = (endpoint || _endpoint) + _apis_data[api || _api].thumbnailsURL;\n  return thumbnailApi.replace(':urn', urn || '');\n};\n\nendp.getUseCredentials = function () {\n  return _useCredentials;\n};\n\nendp.getDomainParam = function () {\n  console.warn(\"getDomainParam is deprecated, switch to getQueryParams instead.\");\n  return this.getUseCredentials() && !isNodeJS() ? \"domain=\" + encodeURIComponent(_window.location.origin) : \"\";\n};\n\n/**\r\n    * Adds a URL parameter that will be used in all data load requests.\r\n    * @param {string} param - The name of the parameter\r\n    * @param {string} value - The value of the parameter. It will be URI encoded when constructing the final URL.\r\n    */\nendp.addQueryParam = function (param, value) {\n  this.queryParams[param] = value;\n};\n\n/**\r\n    * Deletes a previously specified URL parameter.\r\n    * @param {string} param - The name of the parameter to delete\r\n    */\nendp.deleteQueryParam = function (param) {\n  delete this.queryParams[param];\n};\n\nendp.getQueryParams = function (inputObj) {\n\n  var qParam = this.getUseCredentials() && !isNodeJS() ? \"domain=\" + encodeURIComponent(_window.location.origin) : \"\";\n\n  var bypassDs = getParameterByName(\"bypassds\");\n  if (bypassDs) {\n    qParam = qParam ? qParam + \"&bypassds=1\" : \"bypassds=1\";\n  }\n\n  var addedParams = [];\n  for (var p in this.queryParams) {\n    addedParams.push(encodeURIComponent(p) + \"=\" + encodeURIComponent(this.queryParams[p]));\n  }\n\n  if (addedParams.length) {\n    if (qParam)\n    qParam += \"&\" + addedParams.join(\"&\");else\n\n    qParam = addedParams.join(\"&\");\n  }\n\n  if (qParam && inputObj) {\n    if (inputObj.queryParams) {\n      inputObj.queryParams += \"&\" + qParam;\n    } else {\n      inputObj.queryParams = qParam;\n    }\n  }\n\n  return qParam;\n};\n\nendp.setUseCredentials = function (useCredentials) {\n  _useCredentials = useCredentials;\n};\n\nendp.setUseCookie = function (useCookie) {\n  _useCookie = useCookie;\n};\n\nendp.getUseCookie = function () {\n  return _useCookie;\n};\n\nendp.isOtgBackend = function () {\n  return this.getApiFlavor() === this.ENDPOINT_API_FLUENT;\n};\n\nendp.isSVF2Backend = function () {\n  return this.getApiFlavor() === 'D3S' || this.getApiFlavor() === 'D3S_EU';\n};\n\nendp.initLoadContext = function (inputObj) {\n\n  inputObj = inputObj || {};\n\n  inputObj.auth = this.getUseCredentials();\n\n  if (!inputObj.endpoint)\n  inputObj.endpoint = this.getApiEndpoint();\n\n  if (!inputObj.api)\n  inputObj.api = this.getApiFlavor();\n\n  if (!inputObj.headers)\n  inputObj.headers = {};\n\n  for (var p in this.HTTP_REQUEST_HEADERS) {\n    inputObj.headers[p] = this.HTTP_REQUEST_HEADERS[p];\n  }\n\n  if (inputObj.api === this.ENDPOINT_API_FLUENT) {\n    //Turned off because Nginx on fluent server is refusing to\n    //return ranges from the proxy cache -- and it's not clear why.\n    //inputObj.supportsRangeRequests = true;\n  }\n\n  //This is done to avoid CORS errors on content served from proxy or browser cache\n  //The cache will respond with a previously received response, but the Access-Control-Allow-Origin\n  //response header might not match the current Origin header (e.g. localhost vs. developer.api.autodesk.com)\n  //which will cause a CORS error on the second request for the same resource.\n  this.getQueryParams(inputObj);\n\n  //shared geometry/material storage\n  inputObj.otg_cdn = CDN_ROOT || this.getCdnUrl();\n  inputObj.otg_ws = this.getCdnWebSocketEndpoint();\n\n  return inputObj;\n};\n\n//TODO: Globals that need a better place\nvar _env; //formerly avp.env\nexport function getEnv() {\n  return _env;\n}\nexport function setEnv(env) {\n  _env = env;\n}\n\n// Set viewer in offline mode if set to true. In offline mode, viewer would ignore all URNs in bubble JSON\n// and assume the viewables are laid out in local file system path relative to the bubble.json.\nvar _offline = false;\nexport function isOffline() {\n  return _offline;\n}\nexport function setOffline(offline) {\n  _offline = offline;\n}\n\n// Offline resource prefix specified by viewer consumer (e.g. IOS web view). Used as prefix to concatenate with\n// each resource relative path to form the absolute path of each resource.\nvar _offlineResourcePrefix = \"\";\nexport function setOfflineResourcePrefix(prefix) {\n  _offlineResourcePrefix = prefix;\n}\nexport function getOfflineResourcePrefix() {\n  return _offlineResourcePrefix;\n}\n\nexport var endpoint = endp;\n\n//For backwards compatibility until all code is converted to use\n//the function from the endpoint instance.\nexport var initLoadContext = endp.initLoadContext.bind(endp);","\"use strict\";function _typeof(obj) {\"@babel/helpers - typeof\";if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {_typeof = function _typeof(obj) {return typeof obj;};} else {_typeof = function _typeof(obj) {return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;};}return _typeof(obj);}\n\nimport { getGlobal } from \"../compat\";\nimport { i18n } from \"./i18next\";\nimport { Lang } from \"./langs\";\n\nexport var extendLocalization = function extendLocalization(locales) {\n  if (locales !== null && _typeof(locales) === \"object\") {\n    Object.keys(locales).forEach(function (language) {\n      i18n.addResourceBundle(\n      language,\n      \"allstrings\",\n      locales[language],\n      true,\n      true);\n\n    });\n    return true;\n  }\n  return false;\n};\n\nexport var setLanguage = function setLanguage(language, callback) {\n\n  var options = {\n    lng: language,\n    resGetPath: 'res/locales/__lng__/__ns__.json',\n    ns: {\n      namespaces: ['allstrings'],\n      defaultNs: 'allstrings' },\n\n    fallbackLng: \"en\",\n    debug: false,\n    useCookie: false };\n\n\n  getGlobal().LOCALIZATION_REL_PATH = \"res/locales/\" + language + \"/\";\n  i18n.init(options, function (t) {\n    i18n.clearDebugLocString(); //Calls localize as well\n    if (callback) {\n      callback();\n    }\n  });\n};\n\n\n/**\r\n    * Initialize language for localization. The corresponding string files will get downloaded.\r\n    */\nexport var initializeLocalization = function initializeLocalization(options) {\n  var language = options && options.language || navigator.language;\n  var lang = Lang.getSupported(language);\n  setLanguage(lang);\n};","function _typeof(obj) {\"@babel/helpers - typeof\";if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {_typeof = function _typeof(obj) {return typeof obj;};} else {_typeof = function _typeof(obj) {return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;};}return _typeof(obj);} // i18next, v1.7.3\n// Copyright (c)2014 Jan Mühlemann (jamuhl).\n// Distributed under MIT license\n// http://i18next.com\n\nimport { getResourceUrl } from \"../globals\";\nimport { getGlobal } from \"../compat\";\n\nvar global = getGlobal();\nvar _window = global;\nvar _document = _window && _window.document;\n\nvar debugLocString = null;\n\n// Set a specific string that will be used for key values when translating\nfunction setDebugLocString() {\n  debugLocString = 'aaaa';\n  localize();\n}\n\n// Nullify debugLocString and run localization\nfunction clearDebugLocString() {\n  debugLocString = null;\n  localize();\n}\n\n// add indexOf to non ECMA-262 standard compliant browsers\nif (!Array.prototype.indexOf) {\n  Array.prototype.indexOf = function (searchElement /*, fromIndex */) {\n    \"use strict\";\n    if (this == null) {\n      throw new TypeError();\n    }\n    var t = Object(this);\n    var len = t.length >>> 0;\n    if (len === 0) {\n      return -1;\n    }\n    var n = 0;\n    if (arguments.length > 0) {\n      n = Number(arguments[1]);\n      if (n != n) {// shortcut for verifying if it's NaN\n        n = 0;\n      } else if (n != 0 && n != Infinity && n != -Infinity) {\n        n = (n > 0 || -1) * Math.floor(Math.abs(n));\n      }\n    }\n    if (n >= len) {\n      return -1;\n    }\n    var k = n >= 0 ? n : Math.max(len - Math.abs(n), 0);\n    for (; k < len; k++) {\n      if (k in t && t[k] === searchElement) {\n        return k;\n      }\n    }\n    return -1;\n  };\n}\n\n// add lastIndexOf to non ECMA-262 standard compliant browsers\nif (!Array.prototype.lastIndexOf) {\n  Array.prototype.lastIndexOf = function (searchElement /*, fromIndex*/) {\n    \"use strict\";\n    if (this == null) {\n      throw new TypeError();\n    }\n    var t = Object(this);\n    var len = t.length >>> 0;\n    if (len === 0) {\n      return -1;\n    }\n    var n = len;\n    if (arguments.length > 1) {\n      n = Number(arguments[1]);\n      if (n != n) {\n        n = 0;\n      } else if (n != 0 && n != 1 / 0 && n != -(1 / 0)) {\n        n = (n > 0 || -1) * Math.floor(Math.abs(n));\n      }\n    }\n    var k = n >= 0 ? Math.min(n, len - 1) : len - Math.abs(n);\n    for (; k >= 0; k--) {\n      if (k in t && t[k] === searchElement) {\n        return k;\n      }\n    }\n    return -1;\n  };\n}\n\n// Add string trim for IE8.\nif (typeof String.prototype.trim !== 'function') {\n  String.prototype.trim = function () {\n    return this.replace(/^\\s+|\\s+$/g, '');\n  };\n}\n\nvar root = global,\n$ = root.jQuery || root.Zepto,\nresStore = {},\ncurrentLng,\nreplacementCounter = 0,\nlanguages = [],\ninitialized = false;\n\n/*\n                     // Export the i18next object for **CommonJS**.\n                     // If we're not in CommonJS, add `i18n` to the\n                     // global object or to jquery.\n                     if (typeof module !== 'undefined' && module.exports) {\n                         module.exports = i18n;\n                     } else {\n                         if ($) {\n                             $.i18n = $.i18n || i18n;\n                         }\n                         root.i18n = root.i18n || i18n;\n                     }\n                     */\n// defaults\nvar o = {\n  lng: undefined,\n  load: 'current',\n  preload: [],\n  lowerCaseLng: false,\n  returnObjectTrees: false,\n  fallbackLng: ['dev'],\n  fallbackNS: [],\n  detectLngQS: 'setLng',\n  ns: 'translation',\n  fallbackOnNull: true,\n  fallbackOnEmpty: false,\n  fallbackToDefaultNS: false,\n  nsseparator: ':',\n  keyseparator: '.',\n  selectorAttr: 'data-i18n',\n  debug: false,\n\n  resGetPath: 'res/locales/__lng__/__ns__.json',\n  resPostPath: 'res/locales/add/__lng__/__ns__',\n\n  getAsync: true,\n  postAsync: true,\n\n  resStore: undefined,\n  useLocalStorage: false,\n  localStorageExpirationTime: 7 * 24 * 60 * 60 * 1000,\n\n  dynamicLoad: false,\n  sendMissing: false,\n  sendMissingTo: 'fallback', // current | all\n  sendType: 'POST',\n\n  interpolationPrefix: '__',\n  interpolationSuffix: '__',\n  reusePrefix: '$t(',\n  reuseSuffix: ')',\n  pluralSuffix: '_plural',\n  pluralNotFound: ['plural_not_found', Math.random()].join(''),\n  contextNotFound: ['context_not_found', Math.random()].join(''),\n  escapeInterpolation: false,\n\n  defaultValueFromContent: true,\n  useDataAttrOptions: false,\n  cookieExpirationTime: undefined,\n  useCookie: true,\n  cookieName: 'i18next',\n  cookieDomain: undefined,\n\n  objectTreeKeyHandler: undefined,\n  postProcess: undefined,\n  parseMissingKey: undefined,\n\n  shortcutFunction: 'sprintf' // or: defaultValue\n};\n\nfunction _extend(target, source) {\n  if (!source || typeof source === 'function') {\n    return target;\n  }\n\n  for (var attr in source) {target[attr] = source[attr];}\n  return target;\n}\n\nfunction _each(object, callback, args) {\n  var name,i = 0,\n  length = object.length,\n  isObj = length === undefined || Object.prototype.toString.apply(object) !== '[object Array]' || typeof object === \"function\";\n\n  if (args) {\n    if (isObj) {\n      for (name in object) {\n        if (callback.apply(object[name], args) === false) {\n          break;\n        }\n      }\n    } else {\n      for (; i < length;) {\n        if (callback.apply(object[i++], args) === false) {\n          break;\n        }\n      }\n    }\n\n    // A special, fast, case for the most common use of each\n  } else {\n    if (isObj) {\n      for (name in object) {\n        if (callback.call(object[name], name, object[name]) === false) {\n          break;\n        }\n      }\n    } else {\n      for (; i < length;) {\n        if (callback.call(object[i], i, object[i++]) === false) {\n          break;\n        }\n      }\n    }\n  }\n\n  return object;\n}\n\nvar _entityMap = {\n  \"&\": \"&amp;\",\n  \"<\": \"&lt;\",\n  \">\": \"&gt;\",\n  '\"': '&quot;',\n  \"'\": '&#39;',\n  \"/\": '&#x2F;' };\n\n\nfunction _escape(data) {\n  if (typeof data === 'string') {\n    return data.replace(/[&<>\"'\\/]/g, function (s) {\n      return _entityMap[s];\n    });\n  } else {\n    return data;\n  }\n}\n\n\n// This is taken from https://github.com/sindresorhus/strip-json-comments\n//\nvar stripJsonComments = function stripJsonComments(str) {\n\n  var currentChar;\n  var nextChar;\n  var insideString = false;\n  var insideComment = false;\n  var ret = '';\n\n  for (var i = 0; i < str.length; i++) {\n    currentChar = str[i];\n    nextChar = str[i + 1];\n\n    if (!insideComment && str[i - 1] !== '\\\\' && currentChar === '\"') {\n      insideString = !insideString;\n    }\n\n    if (insideString) {\n      ret += currentChar;\n      continue;\n    }\n\n    if (!insideComment && currentChar + nextChar === '//') {\n      insideComment = 'single';\n      i++;\n    } else if (insideComment === 'single' && currentChar + nextChar === '\\r\\n') {\n      insideComment = false;\n      i++;\n    } else if (insideComment === 'single' && currentChar === '\\n') {\n      insideComment = false;\n    } else if (!insideComment && currentChar + nextChar === '/*') {\n      insideComment = 'multi';\n      i++;\n      continue;\n    } else if (insideComment === 'multi' && currentChar + nextChar === '*/') {\n      insideComment = false;\n      i++;\n      continue;\n    }\n\n    if (insideComment) {\n      continue;\n    }\n\n    ret += currentChar;\n  }\n  return ret;\n};\n\nfunction _ajax(options) {\n\n  // v0.5.0 of https://github.com/goloroden/http.js\n  var getXhr = function getXhr(callback) {\n    // Use the native XHR object if the browser supports it.\n    if (_window.XMLHttpRequest) {\n      return callback(null, new XMLHttpRequest());\n    } else if (_window.ActiveXObject) {\n      // In Internet Explorer check for ActiveX versions of the XHR object.\n      try {\n        return callback(null, new ActiveXObject(\"Msxml2.XMLHTTP\"));\n      } catch (e) {\n        return callback(null, new ActiveXObject(\"Microsoft.XMLHTTP\"));\n      }\n    }\n\n    // If no XHR support was found, throw an error.\n    return callback(new Error());\n  };\n\n  var encodeUsingUrlEncoding = function encodeUsingUrlEncoding(data) {\n    if (typeof data === 'string') {\n      return data;\n    }\n\n    var result = [];\n    for (var dataItem in data) {\n      if (data.hasOwnProperty(dataItem)) {\n        result.push(encodeURIComponent(dataItem) + '=' + encodeURIComponent(data[dataItem]));\n      }\n    }\n\n    return result.join('&');\n  };\n\n  var utf8 = function utf8(text) {\n    text = text.replace(/\\r\\n/g, '\\n');\n    var result = '';\n\n    for (var i = 0; i < text.length; i++) {\n      var c = text.charCodeAt(i);\n\n      if (c < 128) {\n        result += String.fromCharCode(c);\n      } else if (c > 127 && c < 2048) {\n        result += String.fromCharCode(c >> 6 | 192);\n        result += String.fromCharCode(c & 63 | 128);\n      } else {\n        result += String.fromCharCode(c >> 12 | 224);\n        result += String.fromCharCode(c >> 6 & 63 | 128);\n        result += String.fromCharCode(c & 63 | 128);\n      }\n    }\n\n    return result;\n  };\n\n  var base64 = function base64(text) {\n    var keyStr = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';\n\n    text = utf8(text);\n    var result = '',\n    chr1,chr2,chr3,\n    enc1,enc2,enc3,enc4,\n    i = 0;\n\n    do {\n      chr1 = text.charCodeAt(i++);\n      chr2 = text.charCodeAt(i++);\n      chr3 = text.charCodeAt(i++);\n\n      enc1 = chr1 >> 2;\n      enc2 = (chr1 & 3) << 4 | chr2 >> 4;\n      enc3 = (chr2 & 15) << 2 | chr3 >> 6;\n      enc4 = chr3 & 63;\n\n      if (isNaN(chr2)) {\n        enc3 = enc4 = 64;\n      } else if (isNaN(chr3)) {\n        enc4 = 64;\n      }\n\n      result +=\n      keyStr.charAt(enc1) +\n      keyStr.charAt(enc2) +\n      keyStr.charAt(enc3) +\n      keyStr.charAt(enc4);\n      chr1 = chr2 = chr3 = '';\n      enc1 = enc2 = enc3 = enc4 = '';\n    } while (i < text.length);\n\n    return result;\n  };\n\n  var mergeHeaders = function mergeHeaders() {\n    // Use the first header object as base.\n    var result = arguments[0];\n\n    // Iterate through the remaining header objects and add them.\n    for (var i = 1; i < arguments.length; i++) {\n      var currentHeaders = arguments[i];\n      for (var header in currentHeaders) {\n        if (currentHeaders.hasOwnProperty(header)) {\n          result[header] = currentHeaders[header];\n        }\n      }\n    }\n\n    // Return the merged headers.\n    return result;\n  };\n\n  //\n  var ajax = function ajax(method, url, options, callback) {\n    // Adjust parameters.\n    if (typeof options === 'function') {\n      callback = options;\n      options = {};\n    }\n\n    // Set default parameter values.\n    options.doNotCache = options.doNotCache || false;\n    options.data = options.data || {};\n    options.headers = options.headers || {};\n    options.jsonp = options.jsonp || false;\n    options.async = options.async === undefined ? true : options.async;\n\n    // Merge the various header objects.\n    var headers = mergeHeaders({\n      'accept': '*/*',\n      'content-type': 'application/x-www-form-urlencoded;charset=UTF-8' },\n    ajax.headers, options.headers);\n\n    // Encode the data according to the content-type.\n    var payload;\n    if (headers['content-type'] === 'application/json') {\n      payload = JSON.stringify(options.data);\n    } else {\n      payload = encodeUsingUrlEncoding(options.data);\n    }\n\n    // Specially prepare GET requests: Setup the query string, handle caching and make a JSONP call\n    // if neccessary.\n    if (method === 'GET') {\n      // Setup the query string.\n      var queryString = [];\n      if (payload) {\n        queryString.push(payload);\n        payload = null;\n      }\n\n      // Handle caching.\n      if (options.doNotCache) {\n        queryString.push('_=' + new Date().getTime());\n      }\n\n      // If neccessary prepare the query string for a JSONP call.\n      if (options.jsonp) {\n        queryString.push('callback=' + options.jsonp);\n        queryString.push('jsonp=' + options.jsonp);\n      }\n\n      // Merge the query string and attach it to the url.\n      queryString = queryString.join('&');\n      if (queryString.length > 1) {\n        if (url.indexOf('?') > -1) {\n          url += '&' + queryString;\n        } else {\n          url += '?' + queryString;\n        }\n      }\n\n      // Make a JSONP call if neccessary.\n      if (options.jsonp) {\n        var head = _document.getElementsByTagName('head')[0];\n        var script = _document.createElement('script');\n        script.type = 'text/javascript';\n        script.src = url;\n        head.appendChild(script);\n        return;\n      }\n    }\n\n    // Since we got here, it is no JSONP request, so make a normal XHR request.\n    getXhr(function (err, xhr) {\n      if (err) return callback(err);\n\n      // Open the request.\n      xhr.open(method, url, options.async);\n\n      // Set the request headers.\n      for (var header in headers) {\n        if (headers.hasOwnProperty(header)) {\n          xhr.setRequestHeader(header, headers[header]);\n        }\n      }\n\n      // Handle the request events.\n      xhr.onreadystatechange = function () {\n        if (xhr.readyState === 4) {\n          var data = xhr.responseText || '';\n\n          // If no callback is given, return.\n          if (!callback) {\n            return;\n          }\n\n          // Return an object that provides access to the data as text and JSON.\n          callback(xhr.status, data);\n\n        }\n      };\n\n      // Actually send the XHR request.\n      xhr.send(payload);\n    });\n  };\n\n  // Define the external interface.\n  var http = {\n    authBasic: function authBasic(username, password) {\n      ajax.headers['Authorization'] = 'Basic ' + base64(username + ':' + password);\n    },\n\n    connect: function connect(url, options, callback) {\n      return ajax('CONNECT', url, options, callback);\n    },\n\n    del: function del(url, options, callback) {\n      return ajax('DELETE', url, options, callback);\n    },\n\n    get: function get(url, options, callback) {\n      return ajax('GET', url, options, callback);\n    },\n\n    head: function head(url, options, callback) {\n      return ajax('HEAD', url, options, callback);\n    },\n\n    headers: function headers(_headers) {\n      ajax.headers = _headers || {};\n    },\n\n    isAllowed: function isAllowed(url, verb, callback) {\n      this.options(url, function (status, data) {\n        callback(data.text().indexOf(verb) !== -1);\n      });\n    },\n\n    options: function options(url, _options, callback) {\n      return ajax('OPTIONS', url, _options, callback);\n    },\n\n    patch: function patch(url, options, callback) {\n      return ajax('PATCH', url, options, callback);\n    },\n\n    post: function post(url, options, callback) {\n      return ajax('POST', url, options, callback);\n    },\n\n    put: function put(url, options, callback) {\n      return ajax('PUT', url, options, callback);\n    },\n\n    trace: function trace(url, options, callback) {\n      return ajax('TRACE', url, options, callback);\n    } };\n\n\n\n  var methode = options.type ? options.type.toLowerCase() : 'get';\n\n  http[methode](options.url, options, function (status, data) {\n    if (status === 200) {\n      options.success(data, status, null);\n    } else {\n      options.error(data, status, null);\n    }\n  });\n}\n\nvar _cookie = {\n  create: function create(name, value, minutes, domain) {\n    var expires;\n    if (minutes) {\n      var date = new Date();\n      date.setTime(date.getTime() + minutes * 60 * 1000);\n      expires = \"; expires=\" + date.toGMTString();\n    } else\n    expires = \"\";\n    domain = domain ? \"domain=\" + domain + \";\" : \"\";\n    _document.cookie = name + \"=\" + value + expires + \";\" + domain + \"path=/\";\n  },\n\n  read: function read(name) {\n    var nameEQ = name + \"=\";\n    var ca = _document.cookie.split(';');\n    for (var i = 0; i < ca.length; i++) {\n      var c = ca[i];\n      while (c.charAt(0) == ' ') {c = c.substring(1, c.length);}\n      if (c.indexOf(nameEQ) === 0) return c.substring(nameEQ.length, c.length);\n    }\n    return null;\n  },\n\n  remove: function remove(name) {\n    this.create(name, \"\", -1);\n  } };\n\n\nvar cookie_noop = {\n  create: function create(name, value, minutes, domain) {},\n  read: function read(name) {return null;},\n  remove: function remove(name) {} };\n\n\n\n\n// move dependent functions to a container so that\n// they can be overriden easier in no jquery environment (node.js)\nvar f = {\n  extend: $ ? $.extend : _extend,\n  each: $ ? $.each : _each,\n  ajax: $ ? $.ajax : typeof _document !== 'undefined' ? _ajax : function () {},\n  cookie: typeof _document !== 'undefined' ? _cookie : cookie_noop,\n  detectLanguage: detectLanguage,\n  escape: _escape,\n  log: function log(str) {\n    if (o.debug && typeof console !== \"undefined\") console.log(str);\n  },\n  toLanguages: function toLanguages(lng) {\n    var languages = [];\n    if (typeof lng === 'string' && lng.indexOf('-') > -1) {\n      var parts = lng.split('-');\n\n      lng = o.lowerCaseLng ?\n      parts[0].toLowerCase() + '-' + parts[1].toLowerCase() :\n      parts[0].toLowerCase() + '-' + parts[1].toUpperCase();\n\n      if (o.load !== 'unspecific') languages.push(lng);\n      if (o.load !== 'current') languages.push(parts[0]);\n    } else {\n      languages.push(lng);\n    }\n\n    for (var i = 0; i < o.fallbackLng.length; i++) {\n      if (languages.indexOf(o.fallbackLng[i]) === -1 && o.fallbackLng[i]) languages.push(o.fallbackLng[i]);\n    }\n\n    return languages;\n  },\n  regexEscape: function regexEscape(str) {\n    return str.replace(/[\\-\\[\\]\\/\\{\\}\\(\\)\\*\\+\\?\\.\\\\\\^\\$\\|]/g, \"\\\\$&\");\n  } };\n\n\nfunction init(options, cb) {\n\n  if (typeof options === 'function') {\n    cb = options;\n    options = {};\n  }\n  options = options || {};\n\n  // override defaults with passed in options\n  f.extend(o, options);\n  delete o.fixLng; /* passed in each time */\n\n  // create namespace object if namespace is passed in as string\n  if (typeof o.ns == 'string') {\n    o.ns = { namespaces: [o.ns], defaultNs: o.ns };\n  }\n\n  // fallback namespaces\n  if (typeof o.fallbackNS == 'string') {\n    o.fallbackNS = [o.fallbackNS];\n  }\n\n  // fallback languages\n  if (typeof o.fallbackLng == 'string' || typeof o.fallbackLng == 'boolean') {\n    o.fallbackLng = [o.fallbackLng];\n  }\n\n  // escape prefix/suffix\n  o.interpolationPrefixEscaped = f.regexEscape(o.interpolationPrefix);\n  o.interpolationSuffixEscaped = f.regexEscape(o.interpolationSuffix);\n\n  if (!o.lng) o.lng = f.detectLanguage();\n  if (o.lng) {\n    // set cookie with lng set (as detectLanguage will set cookie on need)\n    if (o.useCookie) f.cookie.create(o.cookieName, o.lng, o.cookieExpirationTime, o.cookieDomain);\n  } else {\n    o.lng = o.fallbackLng[0];\n    if (o.useCookie) f.cookie.remove(o.cookieName);\n  }\n\n  languages = f.toLanguages(o.lng);\n  currentLng = languages[0];\n  f.log('currentLng set to: ' + currentLng);\n\n  var _lngTranslate = translate;\n  if (options.fixLng) {\n    _lngTranslate = function lngTranslate(key, options) {\n      options = options || {};\n      options.lng = options.lng || _lngTranslate.lng;\n      return translate(key, options);\n    };\n    _lngTranslate.lng = currentLng;\n  }\n\n  pluralExtensions.setCurrentLng(currentLng);\n\n  // return immediately if res are passed in\n  if (o.resStore) {\n    // extend resStore with the new resources.\n    f.each(o.resStore, function (lng, namespaces) {\n      f.each(namespaces, function (ns, resources) {\n        addResourceBundle(lng, ns, resources);\n      });\n    });\n    initialized = true;\n    if (cb) cb(_lngTranslate);\n    return;\n  }\n\n  // languages to load\n  var lngsToLoad = f.toLanguages(o.lng);\n  if (typeof o.preload === 'string') o.preload = [o.preload];\n  for (var i = 0, l = o.preload.length; i < l; i++) {\n    var pres = f.toLanguages(o.preload[i]);\n    for (var y = 0, len = pres.length; y < len; y++) {\n      if (lngsToLoad.indexOf(pres[y]) < 0) {\n        lngsToLoad.push(pres[y]);\n      }\n    }\n  }\n\n  // else load them\n  Autodesk.Viewing.i18n.sync.load(lngsToLoad, o, function (err, store) {\n    // extend resStore with the new resources.\n    f.each(store, function (lng, namespaces) {\n      f.each(namespaces, function (ns, resources) {\n        addResourceBundle(lng, ns, resources);\n      });\n    });\n    initialized = true;\n\n    if (cb) cb(_lngTranslate);\n  });\n}\n\nfunction preload(lngs, cb) {\n  if (typeof lngs === 'string') lngs = [lngs];\n  for (var i = 0, l = lngs.length; i < l; i++) {\n    if (o.preload.indexOf(lngs[i]) < 0) {\n      o.preload.push(lngs[i]);\n    }\n  }\n  return init(cb);\n}\n\nfunction addResourceBundle(lng, ns, resources) {\n  if (typeof ns !== 'string') {\n    resources = ns;\n    ns = o.ns.defaultNs;\n  } else if (o.ns.namespaces.indexOf(ns) < 0) {\n    o.ns.namespaces.push(ns);\n  }\n\n  resStore[lng] = resStore[lng] || {};\n  resStore[lng][ns] = resStore[lng][ns] || {};\n\n  f.extend(resStore[lng][ns], resources);\n}\n\nfunction removeResourceBundle(lng, ns) {\n  if (typeof ns !== 'string') {\n    ns = o.ns.defaultNs;\n  }\n\n  resStore[lng] = resStore[lng] || {};\n  resStore[lng][ns] = {};\n}\n\nfunction setDefaultNamespace(ns) {\n  o.ns.defaultNs = ns;\n}\n\nfunction loadNamespace(namespace, cb) {\n  loadNamespaces([namespace], cb);\n}\n\nfunction loadNamespaces(namespaces, cb) {\n  var opts = {\n    dynamicLoad: o.dynamicLoad,\n    resGetPath: o.resGetPath,\n    getAsync: o.getAsync,\n    customLoad: o.customLoad,\n    ns: { namespaces: namespaces, defaultNs: '' } /* new namespaces to load */ };\n\n\n  // languages to load\n  var lngsToLoad = f.toLanguages(o.lng);\n  if (typeof o.preload === 'string') o.preload = [o.preload];\n  for (var i = 0, l = o.preload.length; i < l; i++) {\n    var pres = f.toLanguages(o.preload[i]);\n    for (var y = 0, len = pres.length; y < len; y++) {\n      if (lngsToLoad.indexOf(pres[y]) < 0) {\n        lngsToLoad.push(pres[y]);\n      }\n    }\n  }\n\n  // check if we have to load\n  var lngNeedLoad = [];\n  for (var a = 0, lenA = lngsToLoad.length; a < lenA; a++) {\n    var needLoad = false;\n    var resSet = resStore[lngsToLoad[a]];\n    if (resSet) {\n      for (var b = 0, lenB = namespaces.length; b < lenB; b++) {\n        if (!resSet[namespaces[b]]) needLoad = true;\n      }\n    } else {\n      needLoad = true;\n    }\n\n    if (needLoad) lngNeedLoad.push(lngsToLoad[a]);\n  }\n\n  if (lngNeedLoad.length) {\n    sync._fetch(lngNeedLoad, opts, function (err, store) {\n      var todo = namespaces.length * lngNeedLoad.length;\n\n      // load each file individual\n      f.each(namespaces, function (nsIndex, nsValue) {\n\n        // append namespace to namespace array\n        if (o.ns.namespaces.indexOf(nsValue) < 0) {\n          o.ns.namespaces.push(nsValue);\n        }\n\n        f.each(lngNeedLoad, function (lngIndex, lngValue) {\n          resStore[lngValue] = resStore[lngValue] || {};\n          resStore[lngValue][nsValue] = store[lngValue][nsValue];\n\n          todo--; // wait for all done befor callback\n          if (todo === 0 && cb) {\n            if (o.useLocalStorage) sync._storeLocal(resStore);\n            cb();\n          }\n        });\n      });\n    });\n  } else {\n    if (cb) cb();\n  }\n}\n\nfunction setLng(lng, options, cb) {\n  if (typeof options === 'function') {\n    cb = options;\n    options = {};\n  } else if (!options) {\n    options = {};\n  }\n\n  options.lng = lng;\n  return init(options, cb);\n}\n\nfunction lng() {\n  return currentLng;\n}\n\nfunction applyReplacement(str, replacementHash, nestedKey, options) {\n  if (!str) return str;\n\n  options = options || replacementHash; // first call uses replacement hash combined with options\n  if (str.indexOf(options.interpolationPrefix || o.interpolationPrefix) < 0) return str;\n\n  var prefix = options.interpolationPrefix ? f.regexEscape(options.interpolationPrefix) : o.interpolationPrefixEscaped,\n  suffix = options.interpolationSuffix ? f.regexEscape(options.interpolationSuffix) : o.interpolationSuffixEscaped,\n  unEscapingSuffix = 'HTML' + suffix;\n\n  f.each(replacementHash, function (key, value) {\n    var nextKey = nestedKey ? nestedKey + o.keyseparator + key : key;\n    if (_typeof(value) === 'object' && value !== null) {\n      str = applyReplacement(str, value, nextKey, options);\n    } else {\n      if (options.escapeInterpolation || o.escapeInterpolation) {\n        str = str.replace(new RegExp([prefix, nextKey, unEscapingSuffix].join(''), 'g'), value);\n        str = str.replace(new RegExp([prefix, nextKey, suffix].join(''), 'g'), f.escape(value));\n      } else {\n        str = str.replace(new RegExp([prefix, nextKey, suffix].join(''), 'g'), value);\n      }\n      // str = options.escapeInterpolation;\n    }\n  });\n  return str;\n}\n\n// append it to functions\nf.applyReplacement = applyReplacement;\n\nfunction applyReuse(translated, options) {\n  var comma = ',';\n  var options_open = '{';\n  var options_close = '}';\n\n  var opts = f.extend({}, options);\n  delete opts.postProcess;\n\n  while (translated.indexOf(o.reusePrefix) != -1) {\n    replacementCounter++;\n    if (replacementCounter > o.maxRecursion) {break;} // safety net for too much recursion\n    var index_of_opening = translated.lastIndexOf(o.reusePrefix);\n    var index_of_end_of_closing = translated.indexOf(o.reuseSuffix, index_of_opening) + o.reuseSuffix.length;\n    var token = translated.substring(index_of_opening, index_of_end_of_closing);\n    var token_without_symbols = token.replace(o.reusePrefix, '').replace(o.reuseSuffix, '');\n\n\n    if (token_without_symbols.indexOf(comma) != -1) {\n      var index_of_token_end_of_closing = token_without_symbols.indexOf(comma);\n      if (token_without_symbols.indexOf(options_open, index_of_token_end_of_closing) != -1 && token_without_symbols.indexOf(options_close, index_of_token_end_of_closing) != -1) {\n        var index_of_opts_opening = token_without_symbols.indexOf(options_open, index_of_token_end_of_closing);\n        var index_of_opts_end_of_closing = token_without_symbols.indexOf(options_close, index_of_opts_opening) + options_close.length;\n        try {\n          opts = f.extend(opts, JSON.parse(token_without_symbols.substring(index_of_opts_opening, index_of_opts_end_of_closing)));\n          token_without_symbols = token_without_symbols.substring(0, index_of_token_end_of_closing);\n        } catch (e) {\n        }\n      }\n    }\n\n    var translated_token = _translate(token_without_symbols, opts);\n    translated = translated.replace(token, translated_token);\n  }\n  return translated;\n}\n\nfunction hasContext(options) {\n  return options.context && (typeof options.context == 'string' || typeof options.context == 'number');\n}\n\nfunction needsPlural(options) {\n  return options.count !== undefined && typeof options.count != 'string' && options.count !== 1;\n}\n\nfunction exists(key, options) {\n  options = options || {};\n\n  var notFound = _getDefaultValue(key, options),\n  found = _find(key, options);\n\n  return found !== undefined || found === notFound;\n}\n\nfunction translate(key, options) {\n  options = options || {};\n\n  if (!initialized) {\n    f.log('i18next not finished initialization. you might have called t function before loading resources finished.');\n    var colon = key.indexOf(\":\");\n    if (colon < 0)\n    colon = 0;else\n\n    colon++;\n\n    var stringToReturn = options.defaultValue || key.substr(colon);\n    if (stringToReturn)\n    stringToReturn = applyReplacement(stringToReturn, options);\n    return stringToReturn;\n  }\n  replacementCounter = 0;\n  return _translate.apply(null, arguments);\n}\n\nfunction _getDefaultValue(key, options) {\n  return options.defaultValue !== undefined ? options.defaultValue : key;\n}\n\nfunction _injectSprintfProcessor() {\n\n  var values = [];\n\n  // mh: build array from second argument onwards\n  for (var i = 1; i < arguments.length; i++) {\n    values.push(arguments[i]);\n  }\n\n  return {\n    postProcess: 'sprintf',\n    sprintf: values };\n\n}\n\nfunction _translate(potentialKeys, options) {\n  if (options && _typeof(options) !== 'object') {\n    if (o.shortcutFunction === 'sprintf') {\n      // mh: gettext like sprintf syntax found, automatically create sprintf processor\n      options = _injectSprintfProcessor.apply(null, arguments);\n    } else if (o.shortcutFunction === 'defaultValue') {\n      options = {\n        defaultValue: options };\n\n    }\n  } else {\n    options = options || {};\n  }\n\n  if (potentialKeys === undefined || potentialKeys === null) return '';\n\n  if (typeof potentialKeys == 'string') {\n    potentialKeys = [potentialKeys];\n  }\n\n  var key = potentialKeys[0];\n\n  if (potentialKeys.length > 1) {\n    for (var i = 0; i < potentialKeys.length; i++) {\n      key = potentialKeys[i];\n      if (exists(key, options)) {\n        break;\n      }\n    }\n  }\n\n  var notFound = _getDefaultValue(key, options),\n  found = _find(key, options),\n  lngs = options.lng ? f.toLanguages(options.lng) : languages,\n  ns = options.ns || o.ns.defaultNs,\n  parts;\n\n  // split ns and key\n  if (key.indexOf(o.nsseparator) > -1) {\n    parts = key.split(o.nsseparator);\n    ns = parts[0];\n    key = parts[1];\n  }\n\n  if (found === undefined && o.sendMissing) {\n    if (options.lng) {\n      sync.postMissing(lngs[0], ns, key, notFound, lngs);\n    } else {\n      sync.postMissing(o.lng, ns, key, notFound, lngs);\n    }\n  }\n\n  var postProcessor = options.postProcess || o.postProcess;\n  if (found !== undefined && postProcessor) {\n    if (postProcessors[postProcessor]) {\n      found = postProcessors[postProcessor](found, key, options);\n    }\n  }\n\n  // return localization test string, if a key is found and debugLocString is enabled\n  if (debugLocString && found !== undefined) return debugLocString;\n\n  // process notFound if function exists\n  var splitNotFound = notFound;\n  if (notFound.indexOf(o.nsseparator) > -1) {\n    parts = notFound.split(o.nsseparator);\n    splitNotFound = parts[1];\n  }\n  if (splitNotFound === key && o.parseMissingKey) {\n    notFound = o.parseMissingKey(notFound);\n  }\n\n  if (found === undefined) {\n    notFound = applyReplacement(notFound, options);\n    notFound = applyReuse(notFound, options);\n\n    if (postProcessor && postProcessors[postProcessor]) {\n      var val = _getDefaultValue(key, options);\n      found = postProcessors[postProcessor](val, key, options);\n    }\n  }\n  return found !== undefined ? found : notFound;\n}\n\nfunction _find(key, options) {\n  options = options || {};\n\n  var optionWithoutCount,translated,\n  notFound = _getDefaultValue(key, options),\n  lngs = languages;\n\n  if (!resStore) {return notFound;} // no resStore to translate from\n\n  // CI mode\n  if (lngs[0].toLowerCase() === 'cimode') return notFound;\n\n  // passed in lng\n  if (options.lng) {\n    lngs = f.toLanguages(options.lng);\n\n    if (!resStore[lngs[0]]) {\n      var oldAsync = o.getAsync;\n      o.getAsync = false;\n\n      sync.load(lngs, o, function (err, store) {\n        f.extend(resStore, store);\n        o.getAsync = oldAsync;\n      });\n    }\n  }\n\n  var ns = options.ns || o.ns.defaultNs;\n  if (key.indexOf(o.nsseparator) > -1) {\n    var parts = key.split(o.nsseparator);\n    ns = parts[0];\n    key = parts[1];\n  }\n\n  if (hasContext(options)) {\n    optionWithoutCount = f.extend({}, options);\n    delete optionWithoutCount.context;\n    optionWithoutCount.defaultValue = o.contextNotFound;\n\n    var contextKey = ns + o.nsseparator + key + '_' + options.context;\n\n    translated = translate(contextKey, optionWithoutCount);\n    if (translated != o.contextNotFound) {\n      return applyReplacement(translated, { context: options.context }); // apply replacement for context only\n    } // else continue translation with original/nonContext key\n  }\n\n  if (needsPlural(options)) {\n    optionWithoutCount = f.extend({}, options);\n    delete optionWithoutCount.count;\n    optionWithoutCount.defaultValue = o.pluralNotFound;\n\n    var pluralKey = ns + o.nsseparator + key + o.pluralSuffix;\n    var pluralExtension = pluralExtensions.get(lngs[0], options.count);\n    if (pluralExtension >= 0) {\n      pluralKey = pluralKey + '_' + pluralExtension;\n    } else if (pluralExtension === 1) {\n      pluralKey = ns + o.nsseparator + key; // singular\n    }\n\n    translated = translate(pluralKey, optionWithoutCount);\n    if (translated != o.pluralNotFound) {\n      return applyReplacement(translated, {\n        count: options.count,\n        interpolationPrefix: options.interpolationPrefix,\n        interpolationSuffix: options.interpolationSuffix });\n      // apply replacement for count only\n    } // else continue translation with original/singular key\n  }\n\n  var found;\n  var keys = key.split(o.keyseparator);\n  for (var i = 0, len = lngs.length; i < len; i++) {\n    if (found !== undefined) break;\n\n    var l = lngs[i];\n\n    var x = 0;\n    var value = resStore[l] && resStore[l][ns];\n    while (keys[x]) {\n      value = value && value[keys[x]];\n      x++;\n    }\n    if (value !== undefined) {\n      var valueType = Object.prototype.toString.apply(value);\n      if (typeof value === 'string') {\n        value = applyReplacement(value, options);\n        value = applyReuse(value, options);\n      } else if (valueType === '[object Array]' && !o.returnObjectTrees && !options.returnObjectTrees) {\n        value = value.join('\\n');\n        value = applyReplacement(value, options);\n        value = applyReuse(value, options);\n      } else if (value === null && o.fallbackOnNull === true) {\n        value = undefined;\n      } else if (value !== null) {\n        if (!o.returnObjectTrees && !options.returnObjectTrees) {\n          if (o.objectTreeKeyHandler && typeof o.objectTreeKeyHandler == 'function') {\n            value = o.objectTreeKeyHandler(key, value, l, ns, options);\n          } else {\n            value = 'key \\'' + ns + ':' + key + ' (' + l + ')\\' ' +\n            'returned an object instead of string.';\n            f.log(value);\n          }\n        } else if (valueType !== '[object Number]' && valueType !== '[object Function]' && valueType !== '[object RegExp]') {\n          var copy = valueType === '[object Array]' ? [] : {}; // apply child translation on a copy\n          f.each(value, function (m) {\n            copy[m] = _translate(ns + o.nsseparator + key + o.keyseparator + m, options);\n          });\n          value = copy;\n        }\n      }\n\n      if (typeof value === 'string' && value.trim() === '' && o.fallbackOnEmpty === true)\n      value = undefined;\n\n      found = value;\n    }\n  }\n\n  if (found === undefined && !options.isFallbackLookup && (o.fallbackToDefaultNS === true || o.fallbackNS && o.fallbackNS.length > 0)) {\n    // set flag for fallback lookup - avoid recursion\n    options.isFallbackLookup = true;\n\n    if (o.fallbackNS.length) {\n\n      for (var y = 0, lenY = o.fallbackNS.length; y < lenY; y++) {\n        found = _find(o.fallbackNS[y] + o.nsseparator + key, options);\n\n        if (found) {\n          /* compare value without namespace */\n          var foundValue = found.indexOf(o.nsseparator) > -1 ? found.split(o.nsseparator)[1] : found,\n          notFoundValue = notFound.indexOf(o.nsseparator) > -1 ? notFound.split(o.nsseparator)[1] : notFound;\n\n          if (foundValue !== notFoundValue) break;\n        }\n      }\n    } else {\n      found = _find(key, options); // fallback to default NS\n    }\n  }\n\n  return found;\n}\nfunction detectLanguage() {\n  var detectedLng;\n\n  // get from qs\n  var qsParm = [];\n  if (typeof window !== 'undefined') {\n    (function () {\n      var query = _window.location.search.substring(1);\n      var parms = query.split('&');\n      for (var i = 0; i < parms.length; i++) {\n        var pos = parms[i].indexOf('=');\n        if (pos > 0) {\n          var key = parms[i].substring(0, pos);\n          var val = parms[i].substring(pos + 1);\n          qsParm[key] = val;\n        }\n      }\n    })();\n    if (qsParm[o.detectLngQS]) {\n      detectedLng = qsParm[o.detectLngQS];\n    }\n  }\n\n  // get from cookie\n  if (!detectedLng && typeof _document !== 'undefined' && o.useCookie) {\n    var c = f.cookie.read(o.cookieName);\n    if (c) detectedLng = c;\n  }\n\n  // get from navigator\n  if (!detectedLng && typeof navigator !== 'undefined') {\n    detectedLng = navigator.language ? navigator.language : navigator.userLanguage;\n  }\n\n  return detectedLng;\n}\nvar sync = {\n\n  load: function load(lngs, options, cb) {\n    if (options.useLocalStorage) {\n      sync._loadLocal(lngs, options, function (err, store) {\n        var missingLngs = [];\n        for (var i = 0, len = lngs.length; i < len; i++) {\n          if (!store[lngs[i]]) missingLngs.push(lngs[i]);\n        }\n\n        if (missingLngs.length > 0) {\n          sync._fetch(missingLngs, options, function (err, fetched) {\n            f.extend(store, fetched);\n            sync._storeLocal(fetched);\n\n            cb(null, store);\n          });\n        } else {\n          cb(null, store);\n        }\n      });\n    } else {\n      sync._fetch(lngs, options, function (err, store) {\n        cb(null, store);\n      });\n    }\n  },\n\n  _loadLocal: function _loadLocal(lngs, options, cb) {\n    var store = {},\n    nowMS = new Date().getTime();\n\n    if (_window.localStorage) {\n\n      var todo = lngs.length;\n\n      f.each(lngs, function (key, lng) {\n        var local = _window.localStorage.getItem('res_' + lng);\n\n        if (local) {\n          local = JSON.parse(local);\n\n          if (local.i18nStamp && local.i18nStamp + options.localStorageExpirationTime > nowMS) {\n            store[lng] = local;\n          }\n        }\n\n        todo--; // wait for all done befor callback\n        if (todo === 0) cb(null, store);\n      });\n    }\n  },\n\n  _storeLocal: function _storeLocal(store) {\n    if (_window.localStorage) {\n      for (var m in store) {\n        store[m].i18nStamp = new Date().getTime();\n        _window.localStorage.setItem('res_' + m, JSON.stringify(store[m]));\n      }\n    }\n    return;\n  },\n\n  _fetch: function _fetch(lngs, options, cb) {\n    var ns = options.ns,\n    store = {};\n\n    if (!options.dynamicLoad) {\n      var todo = ns.namespaces.length * lngs.length,\n      errors;\n\n\n      // Load each file individually.\n      f.each(ns.namespaces, function (nsIndex, nsValue) {\n        f.each(lngs, function (lngIndex, lngValue) {\n\n          // Call this once our translation has returned.\n          var loadComplete = function loadComplete(err, data) {\n            if (err) {\n              errors = errors || [];\n              errors.push(err);\n            }\n            store[lngValue] = store[lngValue] || {};\n            store[lngValue][nsValue] = data;\n\n            todo--; // wait for all done befor callback\n            if (todo === 0) cb(errors, store);\n          };\n\n          if (typeof options.customLoad == 'function') {\n            // Use the specified custom callback.\n            options.customLoad(lngValue, nsValue, options, loadComplete);\n          } else {\n            //~ // Use our inbuilt sync.\n            sync._fetchOne(lngValue, nsValue, options, loadComplete);\n          }\n        });\n      });\n\n    } else {\n      // Call this once our translation has returned.\n      var loadComplete = function loadComplete(err, data) {\n        cb(null, data);\n      };\n\n      if (typeof options.customLoad == 'function') {\n        // Use the specified custom callback.\n        options.customLoad(lngs, ns.namespaces, options, loadComplete);\n      } else {\n        var url = applyReplacement(options.resGetPath, { lng: lngs.join('+'), ns: ns.namespaces.join('+') });\n        // load all needed stuff once\n        url = getResourceUrl(url);\n\n        f.ajax({\n          url: url,\n          success: function success(data, status, xhr) {\n            f.log('loaded: ' + url);\n            loadComplete(null, data.json());\n          },\n          error: function error(xhr, status, _error) {\n            f.log('failed loading: ' + url);\n            loadComplete('failed loading resource.json error: ' + _error);\n          },\n          dataType: \"text\",\n          async: options.getAsync });\n\n      }\n    }\n  },\n\n  _fetchOne: function _fetchOne(lng, ns, options, done) {\n\n    var url = applyReplacement(options.resGetPath, { lng: lng, ns: ns });\n    url = getResourceUrl(url);\n\n    f.ajax({\n      url: url,\n      success: function success(data, status, xhr) {\n        f.log('loaded: ' + url);\n        //[LMV] Skip comments stripping because it's slow and we don't have comments in the localization files\n        var jsonData = data; //stripJsonComments( data );\n        done(null, JSON.parse(jsonData));\n      },\n      error: function error(xhr, status, _error2) {\n        if (status && status == 200 || xhr && xhr.status && xhr.status == 200) {\n          // file loaded but invalid json, stop waste time !\n          f.log('There is a typo in: ' + url);\n        } else if (status && status == 404 || xhr && xhr.status && xhr.status == 404) {\n          f.log('Does not exist: ' + url);\n        } else {\n          var theStatus = status ? status : xhr && xhr.status ? xhr.status : null;\n          f.log(theStatus + ' when loading ' + url);\n        }\n\n        done(_error2, {});\n      },\n      dataType: \"text\",\n      async: options.getAsync });\n\n  },\n\n  postMissing: function postMissing(lng, ns, key, defaultValue, lngs) {\n    var payload = {};\n    payload[key] = defaultValue;\n\n    var urls = [];\n\n    if (o.sendMissingTo === 'fallback' && o.fallbackLng[0] !== false) {\n      for (var i = 0; i < o.fallbackLng.length; i++) {\n        urls.push({ lng: o.fallbackLng[i], url: applyReplacement(o.resPostPath, { lng: o.fallbackLng[i], ns: ns }) });\n      }\n    } else if (o.sendMissingTo === 'current' || o.sendMissingTo === 'fallback' && o.fallbackLng[0] === false) {\n      urls.push({ lng: lng, url: applyReplacement(o.resPostPath, { lng: lng, ns: ns }) });\n    } else if (o.sendMissingTo === 'all') {\n      for (var i = 0, l = lngs.length; i < l; i++) {\n        urls.push({ lng: lngs[i], url: applyReplacement(o.resPostPath, { lng: lngs[i], ns: ns }) });\n      }\n    }\n\n    for (var y = 0, len = urls.length; y < len; y++) {\n      var item = urls[y];\n      f.ajax({\n        url: item.url,\n        type: o.sendType,\n        data: payload,\n        success: function success(data, status, xhr) {\n          f.log('posted missing key \\'' + key + '\\' to: ' + item.url);\n\n          // add key to resStore\n          var keys = key.split('.');\n          var x = 0;\n          var value = resStore[item.lng][ns];\n          while (keys[x]) {\n            if (x === keys.length - 1) {\n              value = value[keys[x]] = defaultValue;\n            } else {\n              value = value[keys[x]] = value[keys[x]] || {};\n            }\n            x++;\n          }\n        },\n        error: function error(xhr, status, _error3) {\n          f.log('failed posting missing key \\'' + key + '\\' to: ' + item.url);\n        },\n        dataType: \"json\",\n        async: o.postAsync });\n\n    }\n  } };\n\n\n// definition http://translate.sourceforge.net/wiki/l10n/pluralforms\nvar pluralExtensions = {\n\n  rules: {\n    \"ach\": {\n      \"name\": \"Acholi\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n > 1);} },\n\n    \"af\": {\n      \"name\": \"Afrikaans\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"ak\": {\n      \"name\": \"Akan\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n > 1);} },\n\n    \"am\": {\n      \"name\": \"Amharic\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n > 1);} },\n\n    \"an\": {\n      \"name\": \"Aragonese\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"ar\": {\n      \"name\": \"Arabic\",\n      \"numbers\": [\n      0,\n      1,\n      2,\n      3,\n      11,\n      100],\n\n      \"plurals\": function plurals(n) {return Number(n === 0 ? 0 : n == 1 ? 1 : n == 2 ? 2 : n % 100 >= 3 && n % 100 <= 10 ? 3 : n % 100 >= 11 ? 4 : 5);} },\n\n    \"arn\": {\n      \"name\": \"Mapudungun\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n > 1);} },\n\n    \"ast\": {\n      \"name\": \"Asturian\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"ay\": {\n      \"name\": \"Aymar\\xE1\",\n      \"numbers\": [\n      1],\n\n      \"plurals\": function plurals(n) {return 0;} },\n\n    \"az\": {\n      \"name\": \"Azerbaijani\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"be\": {\n      \"name\": \"Belarusian\",\n      \"numbers\": [\n      1,\n      2,\n      5],\n\n      \"plurals\": function plurals(n) {return Number(n % 10 == 1 && n % 100 != 11 ? 0 : n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2);} },\n\n    \"bg\": {\n      \"name\": \"Bulgarian\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"bn\": {\n      \"name\": \"Bengali\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"bo\": {\n      \"name\": \"Tibetan\",\n      \"numbers\": [\n      1],\n\n      \"plurals\": function plurals(n) {return 0;} },\n\n    \"br\": {\n      \"name\": \"Breton\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n > 1);} },\n\n    \"bs\": {\n      \"name\": \"Bosnian\",\n      \"numbers\": [\n      1,\n      2,\n      5],\n\n      \"plurals\": function plurals(n) {return Number(n % 10 == 1 && n % 100 != 11 ? 0 : n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2);} },\n\n    \"ca\": {\n      \"name\": \"Catalan\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"cgg\": {\n      \"name\": \"Chiga\",\n      \"numbers\": [\n      1],\n\n      \"plurals\": function plurals(n) {return 0;} },\n\n    \"cs\": {\n      \"name\": \"Czech\",\n      \"numbers\": [\n      1,\n      2,\n      5],\n\n      \"plurals\": function plurals(n) {return Number(n == 1 ? 0 : n >= 2 && n <= 4 ? 1 : 2);} },\n\n    \"csb\": {\n      \"name\": \"Kashubian\",\n      \"numbers\": [\n      1,\n      2,\n      5],\n\n      \"plurals\": function plurals(n) {return Number(n == 1 ? 0 : n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2);} },\n\n    \"cy\": {\n      \"name\": \"Welsh\",\n      \"numbers\": [\n      1,\n      2,\n      3,\n      8],\n\n      \"plurals\": function plurals(n) {return Number(n == 1 ? 0 : n == 2 ? 1 : n != 8 && n != 11 ? 2 : 3);} },\n\n    \"da\": {\n      \"name\": \"Danish\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"de\": {\n      \"name\": \"German\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"dz\": {\n      \"name\": \"Dzongkha\",\n      \"numbers\": [\n      1],\n\n      \"plurals\": function plurals(n) {return 0;} },\n\n    \"el\": {\n      \"name\": \"Greek\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"en\": {\n      \"name\": \"English\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"eo\": {\n      \"name\": \"Esperanto\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"es\": {\n      \"name\": \"Spanish\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"es_ar\": {\n      \"name\": \"Argentinean Spanish\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"et\": {\n      \"name\": \"Estonian\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"eu\": {\n      \"name\": \"Basque\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"fa\": {\n      \"name\": \"Persian\",\n      \"numbers\": [\n      1],\n\n      \"plurals\": function plurals(n) {return 0;} },\n\n    \"fi\": {\n      \"name\": \"Finnish\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"fil\": {\n      \"name\": \"Filipino\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n > 1);} },\n\n    \"fo\": {\n      \"name\": \"Faroese\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"fr\": {\n      \"name\": \"French\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n > 1);} },\n\n    \"fur\": {\n      \"name\": \"Friulian\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"fy\": {\n      \"name\": \"Frisian\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"ga\": {\n      \"name\": \"Irish\",\n      \"numbers\": [\n      1,\n      2,\n      3,\n      7,\n      11],\n\n      \"plurals\": function plurals(n) {return Number(n == 1 ? 0 : n == 2 ? 1 : n < 7 ? 2 : n < 11 ? 3 : 4);} },\n\n    \"gd\": {\n      \"name\": \"Scottish Gaelic\",\n      \"numbers\": [\n      1,\n      2,\n      3,\n      20],\n\n      \"plurals\": function plurals(n) {return Number(n == 1 || n == 11 ? 0 : n == 2 || n == 12 ? 1 : n > 2 && n < 20 ? 2 : 3);} },\n\n    \"gl\": {\n      \"name\": \"Galician\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"gu\": {\n      \"name\": \"Gujarati\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"gun\": {\n      \"name\": \"Gun\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n > 1);} },\n\n    \"ha\": {\n      \"name\": \"Hausa\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"he\": {\n      \"name\": \"Hebrew\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"hi\": {\n      \"name\": \"Hindi\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"hr\": {\n      \"name\": \"Croatian\",\n      \"numbers\": [\n      1,\n      2,\n      5],\n\n      \"plurals\": function plurals(n) {return Number(n % 10 == 1 && n % 100 != 11 ? 0 : n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2);} },\n\n    \"hu\": {\n      \"name\": \"Hungarian\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"hy\": {\n      \"name\": \"Armenian\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"ia\": {\n      \"name\": \"Interlingua\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"id\": {\n      \"name\": \"Indonesian\",\n      \"numbers\": [\n      1],\n\n      \"plurals\": function plurals(n) {return 0;} },\n\n    \"is\": {\n      \"name\": \"Icelandic\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n % 10 != 1 || n % 100 == 11);} },\n\n    \"it\": {\n      \"name\": \"Italian\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"ja\": {\n      \"name\": \"Japanese\",\n      \"numbers\": [\n      1],\n\n      \"plurals\": function plurals(n) {return 0;} },\n\n    \"jbo\": {\n      \"name\": \"Lojban\",\n      \"numbers\": [\n      1],\n\n      \"plurals\": function plurals(n) {return 0;} },\n\n    \"jv\": {\n      \"name\": \"Javanese\",\n      \"numbers\": [\n      0,\n      1],\n\n      \"plurals\": function plurals(n) {return Number(n !== 0);} },\n\n    \"ka\": {\n      \"name\": \"Georgian\",\n      \"numbers\": [\n      1],\n\n      \"plurals\": function plurals(n) {return 0;} },\n\n    \"kk\": {\n      \"name\": \"Kazakh\",\n      \"numbers\": [\n      1],\n\n      \"plurals\": function plurals(n) {return 0;} },\n\n    \"km\": {\n      \"name\": \"Khmer\",\n      \"numbers\": [\n      1],\n\n      \"plurals\": function plurals(n) {return 0;} },\n\n    \"kn\": {\n      \"name\": \"Kannada\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"ko\": {\n      \"name\": \"Korean\",\n      \"numbers\": [\n      1],\n\n      \"plurals\": function plurals(n) {return 0;} },\n\n    \"ku\": {\n      \"name\": \"Kurdish\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"kw\": {\n      \"name\": \"Cornish\",\n      \"numbers\": [\n      1,\n      2,\n      3,\n      4],\n\n      \"plurals\": function plurals(n) {return Number(n == 1 ? 0 : n == 2 ? 1 : n == 3 ? 2 : 3);} },\n\n    \"ky\": {\n      \"name\": \"Kyrgyz\",\n      \"numbers\": [\n      1],\n\n      \"plurals\": function plurals(n) {return 0;} },\n\n    \"lb\": {\n      \"name\": \"Letzeburgesch\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"ln\": {\n      \"name\": \"Lingala\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n > 1);} },\n\n    \"lo\": {\n      \"name\": \"Lao\",\n      \"numbers\": [\n      1],\n\n      \"plurals\": function plurals(n) {return 0;} },\n\n    \"lt\": {\n      \"name\": \"Lithuanian\",\n      \"numbers\": [\n      1,\n      2,\n      10],\n\n      \"plurals\": function plurals(n) {return Number(n % 10 == 1 && n % 100 != 11 ? 0 : n % 10 >= 2 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2);} },\n\n    \"lv\": {\n      \"name\": \"Latvian\",\n      \"numbers\": [\n      1,\n      2,\n      0],\n\n      \"plurals\": function plurals(n) {return Number(n % 10 == 1 && n % 100 != 11 ? 0 : n !== 0 ? 1 : 2);} },\n\n    \"mai\": {\n      \"name\": \"Maithili\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"mfe\": {\n      \"name\": \"Mauritian Creole\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n > 1);} },\n\n    \"mg\": {\n      \"name\": \"Malagasy\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n > 1);} },\n\n    \"mi\": {\n      \"name\": \"Maori\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n > 1);} },\n\n    \"mk\": {\n      \"name\": \"Macedonian\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n == 1 || n % 10 == 1 ? 0 : 1);} },\n\n    \"ml\": {\n      \"name\": \"Malayalam\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"mn\": {\n      \"name\": \"Mongolian\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"mnk\": {\n      \"name\": \"Mandinka\",\n      \"numbers\": [\n      0,\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(0 ? 0 : n == 1 ? 1 : 2);} },\n\n    \"mr\": {\n      \"name\": \"Marathi\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"ms\": {\n      \"name\": \"Malay\",\n      \"numbers\": [\n      1],\n\n      \"plurals\": function plurals(n) {return 0;} },\n\n    \"mt\": {\n      \"name\": \"Maltese\",\n      \"numbers\": [\n      1,\n      2,\n      11,\n      20],\n\n      \"plurals\": function plurals(n) {return Number(n == 1 ? 0 : n === 0 || n % 100 > 1 && n % 100 < 11 ? 1 : n % 100 > 10 && n % 100 < 20 ? 2 : 3);} },\n\n    \"nah\": {\n      \"name\": \"Nahuatl\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"nap\": {\n      \"name\": \"Neapolitan\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"nb\": {\n      \"name\": \"Norwegian Bokmal\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"ne\": {\n      \"name\": \"Nepali\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"nl\": {\n      \"name\": \"Dutch\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"nn\": {\n      \"name\": \"Norwegian Nynorsk\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"no\": {\n      \"name\": \"Norwegian\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"nso\": {\n      \"name\": \"Northern Sotho\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"oc\": {\n      \"name\": \"Occitan\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n > 1);} },\n\n    \"or\": {\n      \"name\": \"Oriya\",\n      \"numbers\": [\n      2,\n      1],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"pa\": {\n      \"name\": \"Punjabi\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"pap\": {\n      \"name\": \"Papiamento\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"pl\": {\n      \"name\": \"Polish\",\n      \"numbers\": [\n      1,\n      2,\n      5],\n\n      \"plurals\": function plurals(n) {return Number(n == 1 ? 0 : n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2);} },\n\n    \"pms\": {\n      \"name\": \"Piemontese\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"ps\": {\n      \"name\": \"Pashto\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"pt\": {\n      \"name\": \"Portuguese\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"pt_br\": {\n      \"name\": \"Brazilian Portuguese\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"rm\": {\n      \"name\": \"Romansh\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"ro\": {\n      \"name\": \"Romanian\",\n      \"numbers\": [\n      1,\n      2,\n      20],\n\n      \"plurals\": function plurals(n) {return Number(n == 1 ? 0 : n === 0 || n % 100 > 0 && n % 100 < 20 ? 1 : 2);} },\n\n    \"ru\": {\n      \"name\": \"Russian\",\n      \"numbers\": [\n      1,\n      2,\n      5],\n\n      \"plurals\": function plurals(n) {return Number(n % 10 == 1 && n % 100 != 11 ? 0 : n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2);} },\n\n    \"sah\": {\n      \"name\": \"Yakut\",\n      \"numbers\": [\n      1],\n\n      \"plurals\": function plurals(n) {return 0;} },\n\n    \"sco\": {\n      \"name\": \"Scots\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"se\": {\n      \"name\": \"Northern Sami\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"si\": {\n      \"name\": \"Sinhala\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"sk\": {\n      \"name\": \"Slovak\",\n      \"numbers\": [\n      1,\n      2,\n      5],\n\n      \"plurals\": function plurals(n) {return Number(n == 1 ? 0 : n >= 2 && n <= 4 ? 1 : 2);} },\n\n    \"sl\": {\n      \"name\": \"Slovenian\",\n      \"numbers\": [\n      5,\n      1,\n      2,\n      3],\n\n      \"plurals\": function plurals(n) {return Number(n % 100 == 1 ? 1 : n % 100 == 2 ? 2 : n % 100 == 3 || n % 100 == 4 ? 3 : 0);} },\n\n    \"so\": {\n      \"name\": \"Somali\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"son\": {\n      \"name\": \"Songhay\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"sq\": {\n      \"name\": \"Albanian\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"sr\": {\n      \"name\": \"Serbian\",\n      \"numbers\": [\n      1,\n      2,\n      5],\n\n      \"plurals\": function plurals(n) {return Number(n % 10 == 1 && n % 100 != 11 ? 0 : n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2);} },\n\n    \"su\": {\n      \"name\": \"Sundanese\",\n      \"numbers\": [\n      1],\n\n      \"plurals\": function plurals(n) {return 0;} },\n\n    \"sv\": {\n      \"name\": \"Swedish\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"sw\": {\n      \"name\": \"Swahili\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"ta\": {\n      \"name\": \"Tamil\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"te\": {\n      \"name\": \"Telugu\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"tg\": {\n      \"name\": \"Tajik\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n > 1);} },\n\n    \"th\": {\n      \"name\": \"Thai\",\n      \"numbers\": [\n      1],\n\n      \"plurals\": function plurals(n) {return 0;} },\n\n    \"ti\": {\n      \"name\": \"Tigrinya\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n > 1);} },\n\n    \"tk\": {\n      \"name\": \"Turkmen\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"tr\": {\n      \"name\": \"Turkish\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n > 1);} },\n\n    \"tt\": {\n      \"name\": \"Tatar\",\n      \"numbers\": [\n      1],\n\n      \"plurals\": function plurals(n) {return 0;} },\n\n    \"ug\": {\n      \"name\": \"Uyghur\",\n      \"numbers\": [\n      1],\n\n      \"plurals\": function plurals(n) {return 0;} },\n\n    \"uk\": {\n      \"name\": \"Ukrainian\",\n      \"numbers\": [\n      1,\n      2,\n      5],\n\n      \"plurals\": function plurals(n) {return Number(n % 10 == 1 && n % 100 != 11 ? 0 : n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2);} },\n\n    \"ur\": {\n      \"name\": \"Urdu\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"uz\": {\n      \"name\": \"Uzbek\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n > 1);} },\n\n    \"vi\": {\n      \"name\": \"Vietnamese\",\n      \"numbers\": [\n      1],\n\n      \"plurals\": function plurals(n) {return 0;} },\n\n    \"wa\": {\n      \"name\": \"Walloon\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n > 1);} },\n\n    \"wo\": {\n      \"name\": \"Wolof\",\n      \"numbers\": [\n      1],\n\n      \"plurals\": function plurals(n) {return 0;} },\n\n    \"yo\": {\n      \"name\": \"Yoruba\",\n      \"numbers\": [\n      1,\n      2],\n\n      \"plurals\": function plurals(n) {return Number(n != 1);} },\n\n    \"zh\": {\n      \"name\": \"Chinese\",\n      \"numbers\": [\n      1],\n\n      \"plurals\": function plurals(n) {return 0;} } },\n\n\n\n  // for demonstration only sl and ar is added but you can add your own pluralExtensions\n  addRule: function addRule(lng, obj) {\n    pluralExtensions.rules[lng] = obj;\n  },\n\n  setCurrentLng: function setCurrentLng(lng) {\n    if (!pluralExtensions.currentRule || pluralExtensions.currentRule.lng !== lng) {\n      var parts = lng.split('-');\n\n      pluralExtensions.currentRule = {\n        lng: lng,\n        rule: pluralExtensions.rules[parts[0]] };\n\n    }\n  },\n\n  get: function get(lng, count) {\n    var parts = lng.split('-');\n\n    function getResult(l, c) {\n      var ext;\n      if (pluralExtensions.currentRule && pluralExtensions.currentRule.lng === lng) {\n        ext = pluralExtensions.currentRule.rule;\n      } else {\n        ext = pluralExtensions.rules[l];\n      }\n      if (ext) {\n        var i = ext.plurals(c);\n        var number = ext.numbers[i];\n        if (ext.numbers.length === 2 && ext.numbers[0] === 1) {\n          if (number === 2) {\n            number = -1; // regular plural\n          } else if (number === 1) {\n            number = 1; // singular\n          }\n        } //console.log(count + '-' + number);\n        return number;\n      } else {\n        return c === 1 ? '1' : '-1';\n      }\n    }\n\n    return getResult(parts[0], count);\n  } };\n\n\nvar postProcessors = {};\nvar addPostProcessor = function addPostProcessor(name, fc) {\n  postProcessors[name] = fc;\n};\n\n// sprintf support\nvar sprintf = function () {\n  function get_type(variable) {\n    return Object.prototype.toString.call(variable).slice(8, -1).toLowerCase();\n  }\n  function str_repeat(input, multiplier) {\n    for (var output = []; multiplier > 0; output[--multiplier] = input) {/* do nothing */}\n    return output.join('');\n  }\n\n  var str_format = function str_format() {\n    if (!str_format.cache.hasOwnProperty(arguments[0])) {\n      str_format.cache[arguments[0]] = str_format.parse(arguments[0]);\n    }\n    return str_format.format.call(null, str_format.cache[arguments[0]], arguments);\n  };\n\n  str_format.format = function (parse_tree, argv) {\n    var cursor = 1,tree_length = parse_tree.length,node_type = '',arg,output = [],i,k,match,pad,pad_character,pad_length;\n    for (i = 0; i < tree_length; i++) {\n      node_type = get_type(parse_tree[i]);\n      if (node_type === 'string') {\n        output.push(parse_tree[i]);\n      } else\n      if (node_type === 'array') {\n        match = parse_tree[i]; // convenience purposes only\n        if (match[2]) {// keyword argument\n          arg = argv[cursor];\n          for (k = 0; k < match[2].length; k++) {\n            if (!arg.hasOwnProperty(match[2][k])) {\n              throw sprintf('[sprintf] property \"%s\" does not exist', match[2][k]);\n            }\n            arg = arg[match[2][k]];\n          }\n        } else\n        if (match[1]) {// positional argument (explicit)\n          arg = argv[match[1]];\n        } else\n        {// positional argument (implicit)\n          arg = argv[cursor++];\n        }\n\n        if (/[^s]/.test(match[8]) && get_type(arg) != 'number') {\n          throw sprintf('[sprintf] expecting number but found %s', get_type(arg));\n        }\n        switch (match[8]) {\n          case 'b':arg = arg.toString(2);break;\n          case 'c':arg = String.fromCharCode(arg);break;\n          case 'd':arg = parseInt(arg, 10);break;\n          case 'e':arg = match[7] ? arg.toExponential(match[7]) : arg.toExponential();break;\n          case 'f':arg = match[7] ? parseFloat(arg).toFixed(match[7]) : parseFloat(arg);break;\n          case 'o':arg = arg.toString(8);break;\n          case 's':arg = (arg = String(arg)) && match[7] ? arg.substring(0, match[7]) : arg;break;\n          case 'u':arg = Math.abs(arg);break;\n          case 'x':arg = arg.toString(16);break;\n          case 'X':arg = arg.toString(16).toUpperCase();break;}\n\n        arg = /[def]/.test(match[8]) && match[3] && arg >= 0 ? '+' + arg : arg;\n        pad_character = match[4] ? match[4] == '0' ? '0' : match[4].charAt(1) : ' ';\n        pad_length = match[6] - String(arg).length;\n        pad = match[6] ? str_repeat(pad_character, pad_length) : '';\n        output.push(match[5] ? arg + pad : pad + arg);\n      }\n    }\n    return output.join('');\n  };\n\n  str_format.cache = {};\n\n  str_format.parse = function (fmt) {\n    var _fmt = fmt,match = [],parse_tree = [],arg_names = 0;\n    while (_fmt) {\n      if ((match = /^[^\\x25]+/.exec(_fmt)) !== null) {\n        parse_tree.push(match[0]);\n      } else\n      if ((match = /^\\x25{2}/.exec(_fmt)) !== null) {\n        parse_tree.push('%');\n      } else\n      if ((match = /^\\x25(?:([1-9]\\d*)\\$|\\(([^\\)]+)\\))?(\\+)?(0|'[^$])?(-)?(\\d+)?(?:\\.(\\d+))?([b-fosuxX])/.exec(_fmt)) !== null) {\n        if (match[2]) {\n          arg_names |= 1;\n          var field_list = [],replacement_field = match[2],field_match = [];\n          if ((field_match = /^([a-z_][a-z_\\d]*)/i.exec(replacement_field)) !== null) {\n            field_list.push(field_match[1]);\n            while ((replacement_field = replacement_field.substring(field_match[0].length)) !== '') {\n              if ((field_match = /^\\.([a-z_][a-z_\\d]*)/i.exec(replacement_field)) !== null) {\n                field_list.push(field_match[1]);\n              } else\n              if ((field_match = /^\\[(\\d+)\\]/.exec(replacement_field)) !== null) {\n                field_list.push(field_match[1]);\n              } else\n              {\n                throw '[sprintf] huh?';\n              }\n            }\n          } else\n          {\n            throw '[sprintf] huh?';\n          }\n          match[2] = field_list;\n        } else\n        {\n          arg_names |= 2;\n        }\n        if (arg_names === 3) {\n          throw '[sprintf] mixing positional and named placeholders is not (yet) supported';\n        }\n        parse_tree.push(match);\n      } else\n      {\n        throw '[sprintf] huh?';\n      }\n      _fmt = _fmt.substring(match[0].length);\n    }\n    return parse_tree;\n  };\n\n  return str_format;\n}();\n\nvar vsprintf = function vsprintf(fmt, argv) {\n  argv.unshift(fmt);\n  return sprintf.apply(null, argv);\n};\n\naddPostProcessor(\"sprintf\", function (val, key, opts) {\n  if (!opts.sprintf) return val;\n\n  if (Object.prototype.toString.apply(opts.sprintf) === '[object Array]') {\n    return vsprintf(val, opts.sprintf);\n  } else if (_typeof(opts.sprintf) === 'object') {\n    return sprintf(val, opts.sprintf);\n  }\n\n  return val;\n});\n\n// medinaf: Added optional argument `domElement` to limit the extent of what DOM needs localization.\nvar localize = function localize(domElement) {\n  // Parse data\n  function parse(data) {\n\n    // LMV may attempts to translate text such as \"Hello [123]Here\"\n    // In the presence of square brackets, i18n will attempt to\n    // set an attribute on the dom element:\n    //\n    //   elem.setAttribute(123,'Here');\n    //\n    //  Notice that \"Hello \" gets ignored in this typo of scenarios.\n    //  The above code will fail because '123' is not a valid attribute.\n    //\n    // LMV does not care about this feature. Disabling it.\n    return [null, data];\n    /*\n                                     var attribute, value;\n                         \n                                     var dataSplit = data.split(/\\[|\\]/);\n                                     if (dataSplit.length === 1) {\n                                         attribute = null;\n                                         value = dataSplit[0];\n                                     }\n                                     else if (dataSplit.length===3) {\n                                         attribute = dataSplit[1];\n                                         value = dataSplit[2];\n                                     }\n                                     return [attribute, value];\n                         */\n  };\n\n  var rootNode = domElement || _document;\n  Array.prototype.forEach.call(rootNode.querySelectorAll('[data-i18n]'), function (element) {\n    var dataToTranslate = element.getAttribute('data-i18n');\n    var parsed = parse(dataToTranslate);\n    var attributeName = parsed[0];\n    var stringToTrans = parsed[1];\n\n    var translatedString = translate(stringToTrans);\n    if (translatedString)\n    {\n      if (attributeName) {\n        element.setAttribute(attributeName, translatedString);\n      } else\n      {\n        // Attribute Name is always null.\n        // If the element has a placeholder, it's an edit box, no need to translate the textContent.\n        if (element.placeholder) {\n          element.placeholder = translatedString;\n        } else {\n          element.textContent = translatedString;\n        }\n      }\n    } else\n\n    {\n      if (attributeName) {\n        element.setAttribute(attributeName, stringToTrans);\n      } else\n      {\n        element.textContent = stringToTrans;\n      }\n    }\n  });\n};\n\n// public api interface\nexport var i18n = {\n  init: init,\n  setLng: setLng,\n  preload: preload,\n  addResourceBundle: addResourceBundle,\n  removeResourceBundle: removeResourceBundle,\n  loadNamespace: loadNamespace,\n  loadNamespaces: loadNamespaces,\n  localize: localize,\n  setDefaultNamespace: setDefaultNamespace,\n  t: translate,\n  translate: translate,\n  exists: exists,\n  detectLanguage: f.detectLanguage,\n  pluralExtensions: pluralExtensions,\n  sync: sync,\n  functions: f,\n  lng: lng,\n  addPostProcessor: addPostProcessor,\n  options: o,\n  setDebugLocString: setDebugLocString,\n  clearDebugLocString: clearDebugLocString };","\"use strict\";\n\nfunction LangCtor() {\n\n  // Adding a new language:\n  //   1. Add it to `this.names`, The symbol name should match the folder name in res/locales/{name}\n  //   2. Update file `ContinuousLocalization.yml`\n\n  this.names = [\n  { symbol: 'en', label: 'English' },\n  { symbol: 'zh-HANS', label: 'Chinese Simplified' },\n  { symbol: 'zh-HANT', label: 'Chinese Traditional' },\n  { symbol: 'ja', label: 'Japanese' },\n  { symbol: 'cs', label: 'Czech' },\n  { symbol: 'ko', label: 'Korean' },\n  { symbol: 'pl', label: 'Polish' },\n  { symbol: 'ru', label: 'Russian' },\n  { symbol: 'fr', label: 'French' },\n  { symbol: 'fr-CA', label: 'Canadian French' },\n  { symbol: 'de', label: 'German' },\n  { symbol: 'it', label: 'Italian' },\n  { symbol: 'nl', label: 'Dutch' },\n  { symbol: 'es', label: 'Spanish' },\n  { symbol: 'pt-BR', label: 'Portuguese Brazil' },\n  { symbol: 'tr', label: 'Turkish' },\n  { symbol: 'sv', label: 'Swedish' },\n  { symbol: 'da', label: 'Danish' },\n  { symbol: 'no', label: 'Norwegian' }];\n\n\n  this.isSupported = function (isoCode) {\n    for (var i = 0; i < this.names.length; ++i) {\n      if (this.names[i].symbol === isoCode)\n      return true;\n    }\n    return false;\n  };\n\n  this.getSupported = function (language) {\n\n    // use iso scheme (ab/ab-XY)\n    var tags = language.split('-');\n    language = tags.length > 1 ? tags[0].toLowerCase() + '-' + tags[1].toUpperCase() : tags[0].toLowerCase();\n\n    // check supported language tags and subtags\n    if (!this.isSupported(language)) {\n      if (language.indexOf(\"zh-CN\") > -1) language = \"zh-HANS\";else\n      if (language.indexOf(\"zh-TW\") > -1) language = \"zh-HANT\";else\n      if (tags.length > 1 && this.isSupported(tags[0].toLowerCase())) language = tags[0];else\n      language = \"en\";\n    }\n\n    return language;\n  };\n\n  this.getLanguages = function () {\n    return this.names.slice();\n  };\n\n}\n\nvar Lang = new LangCtor();\n\nmodule.exports = { Lang: Lang };","\nimport { getGlobal, isNodeJS } from \"./compat\";\n\nvar g = getGlobal();\nvar _window = g;\nvar _document = _window && _window.document;\n\ng.LOCALIZATION_REL_PATH = \"\";\n\n/**\n                               * Contains the Viewer's version.\n                               * @type {string}\n                               * @global\n                               */\ng.LMV_VIEWER_VERSION = BUILD_FLAG__BUILD_VERSION;\n\ng.LMV_BUILD_TYPE = BUILD_FLAG__BUILD_TYPE;\ng.LMV_RESOURCE_ROOT = \"\";\n\n/**\n                           * When true, requests to Forge are authenticated with a cookie. \n                           * When false, requests to Forge are authenticated with an Authentication header.\n                           * When undefined, the viewer will first try authentication via cookie, if \n                           * that doesn't work it will fallback to using an Authentication header.\n                           * @type {boolean|undefined}\n                           * @global\n                           * @default undefined\n                           */\ng.LMV_THIRD_PARTY_COOKIE = isNodeJS() ? false : undefined;\n\nif (g.LMV_VIEWER_VERSION.charAt(0) === 'v') {\n  // remove prefixed 'v'\n  // Required due to TeamCity build pipeline (LMV-1361)\n  g.LMV_VIEWER_VERSION = g.LMV_VIEWER_VERSION.substr(1);\n}\n\n\n/**\n   * When true, the viewer will favor loading the PDF file over the Leaflet derivative, \n   * ignoring the manifest value for `totalRasterPixels`. A true value will take precedence over {@link LMV_RASTER_PDF}.\n   * @type {boolean}\n   * @default \n   * @global\n   */\ng.LMV_VECTOR_PDF = false;\n\n/**\n                           * When true, the viewer will favor loading the Leaflet derivative over the PDF file,\n                           * ignoring the manifest value for `totalRasterPixels`. When {@link LMV_RASTER_PDF} is true, this value is ignored. \n                           * @type {boolean}\n                           * @default \n                           * @global\n                           */\ng.LMV_RASTER_PDF = true;\n\n/**\n                          * When true, LMV starts using the new modelToSheetTransform from AECModelData.json for the 2D/3D transform (if available).\n                          * @type {boolean}\n                          * @default\n                          * @global\n                          */\ng.AEC_MODELTOSHEET_TRANSFORM = false;\n\n\n/**\n                                       * When true, LMV will remove the Forge Logo spinner and the in canvas Forge logo\n                                       * Note: We disable the branding for the fluent build. For the regular build this will be enabled.\n                                       * @private\n                                       */\nexport var DISABLE_FORGE_LOGO = BUILD_FLAG__FLUENT_PROFILE;\n\n\n/**\n                                                             * When true, LMV will remove the in canvas Forge logo. To remove both the in canvas and the spinner logos use DISABLE_FORGE_LOG\n                                                             * @private\n                                                             */\nexport var DISABLE_FORGE_CANVAS_LOGO = true; // Switch to false to enable the in-canvas logo\n\n\n// TODO:  This is here for now, until we find a better place for it.\n//\n/**\n * Returns the first source url found containing the given script name.\n * @private\n * @param {string} scriptName - Script name.\n * @returns {HTMLScriptElement} The script element whose source location matches the input parameter.\n */\nexport function getScript(scriptName) {\n  scriptName = scriptName.toLowerCase();\n  var scripts = _document.getElementsByTagName('SCRIPT');\n  if (scripts && scripts.length > 0) {\n    for (var i = 0; i < scripts.length; ++i) {\n      if (scripts[i].src && scripts[i].src.toLowerCase().indexOf(scriptName) !== -1) {\n        return scripts[i];\n      }\n    }\n  }\n  return null;\n}\n\n/**\n   * Inject a css file into the page.\n   * There's a callback if you need to know when it gets downloaded (rare).\n   * Accepts both relative and absolute URLs.\n   * @private\n   */\nexport function injectCSS(cssUrl, callback, onError) {\n  var href = cssUrl.indexOf('://') > 0 ? cssUrl : getResourceUrl(cssUrl);\n\n  // Verify that we haven't downloaded it already\n  var results = _document.getElementsByTagName('link');\n  for (var i = 0, len = results.length; i < len; i++) {\n    if (results[i].href === href) {\n      // Already downloaded\n      callback && callback();\n      return;\n    }\n  }\n\n  // else, download it\n  var s = _document.createElement(\"link\");\n  s.setAttribute('rel', \"stylesheet\");\n  s.setAttribute('type', \"text/css\");\n  s.setAttribute('href', href);\n  if (callback) {\n    s.onload = callback;\n  }\n  if (onError) {\n    s.onerror = onError;\n  }\n  _document.head.appendChild(s);\n}\n\n/**\n   * Download an HTML template.\n   * If successful, will invoke callback(null, templateString)\n   * If failure, will invoke callback(\"some error\", null)\n   * @private\n   * @deprecated\n   */\nexport function getHtmlTemplate(templateUrl, callback) {\n  var href = templateUrl.indexOf('://') > 0 ? templateUrl : getResourceUrl(templateUrl);\n  var request = new XMLHttpRequest();\n  request.onload = requestLoad;\n  request.onerror = requestError;\n  request.ontimeout = requestError;\n  request.open('GET', href, true);\n  request.send();\n\n  function requestError(err) {\n    callback(err, null);\n  }\n  function requestLoad(event) {\n    var content = event.currentTarget.responseText;\n    callback(null, content);\n  }\n\n}\n\n/**\n   * Checks whether an experimental flag has been set into the viewer's' `config`\n   * object, which happens to be the same as the extension's `options` object.\n   * @private\n   */\nexport function isExperimentalFlagEnabled(flagName, config3d) {\n  if (!config3d || !Array.isArray(config3d.experimental))\n  return false;\n  return config3d.experimental.indexOf(flagName) !== -1;\n}\n\n\n/**\n   * Returns the full url of a resource with version.\n   * The version will be determined from the LMV_VIEWER_VERSION variable.\n   * @private\n   * @param {string} resourceRelativePath - The path of the resource relative to LMV_RESOURCE_ROOT.\n   * @returns {string} The full resource path.\n   */\nexport function getResourceUrl(resourceRelativePath) {\n  return g.LMV_RESOURCE_ROOT + resourceRelativePath;\n}\n\n\n// Returns the query parameter value from window url\nexport function getParameterByName(name) {\n  if (typeof window === \"undefined\") {\n    return \"\";\n  }\n  return getParameterByNameFromPath(name, _window.location.href);\n}\n\n// return value of parameter from a url\nexport function getParameterByNameFromPath(name, url) {\n  name = name.replace(/[\\[]/, \"\\\\\\[\").replace(/[\\]]/, \"\\\\\\]\");\n  var regexS = \"[\\\\?&]\" + name + \"=([^&#]*)\";\n  var regex = new RegExp(regexS);\n  var results = regex.exec(url);\n  if (results == null)\n  return \"\";else\n\n  return decodeURIComponent(results[1].replace(/\\+/g, \" \"));\n}\n\n\nexport function stringToDOM(str) {\n  var d = _document.createElement(\"div\");\n  d.innerHTML = str;\n  return d.firstChild;\n}\n\nexport function toUrlSafeBase64(str) {\n  var base64 = btoa(str).\n  replace(/\\+/g, '-') // Convert '+' to '-' (dash)\n  .replace(/\\//g, '_') // Convert '/' to '_' (underscore)\n  .replace(/=+$/, ''); // Remove trailing '='\n\n  return base64;\n}\n\nexport function fromUrlSafeBase64(str) {\n  str = str.replace(/-/g, '+'); // Convert '-' (dash) to '+'\n  str = str.replace(/_/g, '/'); // Convert '_' (underscore) to '/'\n  while (str.length % 4) {str += '=';} // Add padding '='\n\n  return atob(str);\n}","// extracted by mini-css-extract-plugin","\nimport { i18n } from \"../globalization/i18next\";\n\n\n/** @constructor \n                                                  *\n                                                  * @alias Autodesk.Viewing.Private.AlertBox\n                                                  *\n                                                  */\nexport function AlertBox() {\n}\n\nAlertBox.instances = [];\n\n// static\nAlertBox.displayError = function (container, msg, title, imgClass, hints) {\n\n  var _document = container.ownerDocument;\n  var alertBox = _document.createElement(\"div\");\n  alertBox.className = \"alert-box error\";\n  container.appendChild(alertBox);\n\n  // Create the image element.\n  var errorImageClass = imgClass;\n  if (!errorImageClass)\n  errorImageClass = \"img-item-not-found\";\n\n  var alertBoxImg = _document.createElement(\"div\");\n  alertBoxImg.className = \"alert-box-image \" + errorImageClass;\n  alertBox.appendChild(alertBoxImg);\n\n  // Create the title & message element.\n  var alertBoxMsg = _document.createElement(\"div\");\n  alertBoxMsg.className = \"alert-box-msg\";\n  alertBox.appendChild(alertBoxMsg);\n\n  var errorTitle = title;\n  if (!errorTitle)\n  errorTitle = i18n.translate(\"Error Occurred\", { \"defaultValue\": \"Error Occurred\" });\n\n  var alertBoxTitle = _document.createElement(\"div\");\n  alertBoxTitle.className = \"alert-box-title\";\n  alertBoxTitle.textContent = errorTitle;\n  alertBoxTitle.setAttribute('data-i18n', errorTitle);\n  alertBoxMsg.appendChild(alertBoxTitle);\n\n  var alertBoxText = _document.createElement(\"div\");\n  alertBoxText.className = \"alert-box-text\";\n  alertBoxText.textContent = msg;\n  alertBoxText.setAttribute('data-i18n', msg);\n  alertBoxMsg.appendChild(alertBoxText);\n\n  // Add additional content\n  if (hints) {\n    var content = _document.createElement(\"div\");\n    content.className = \"alert-box-content\";\n    alertBoxMsg.appendChild(content);\n\n    var hintsElement = _document.createElement(\"ul\");\n    hintsElement.className = \"alert-box-content\";\n    for (var h = 0; h < hints.length; h++) {\n      var hint = hints[h];\n      if (!hint)\n      continue;\n\n      var hintElem = _document.createElement(\"li\");\n\n      var result = this.extractList(hint);\n      if (result.list.length) {\n        var unorderedlist = this.generateListElement(list, _document);\n        hintsElement.appendChild(unorderedlist);\n      }\n      hintElem.innerHTML = result.msg;\n      hintElem.setAttribute('data-i18n', result.msg);\n      hintsElement.appendChild(hintElem);\n    }\n    content.appendChild(hintsElement);\n  }\n\n  var alertBoxOK = _document.createElement(\"div\");\n  alertBoxOK.className = \"alert-box-ok\";\n  alertBoxOK.textContent = i18n.translate(\"OK\", { \"defaultValue\": \"OK\" });\n\n  var instance = { alertBox: alertBox, container: container };\n  alertBoxOK.addEventListener(\"click\", function (event) {\n    alertBox.style.visibility = \"hidden\";\n    container.removeChild(alertBox);\n    AlertBox.instances.splice(AlertBox.instances.indexOf(instance), 1);\n  });\n  alertBox.appendChild(alertBoxOK);\n\n  alertBox.style.visibility = \"visible\";\n\n  AlertBox.instances.push(instance);\n};\n\n// static\nAlertBox.displayErrors = function (container, imgClass, errors) {\n\n  var _document = container.ownerDocument;\n  var alertBox = _document.createElement(\"div\");\n  alertBox.className = \"alert-box errors\";\n  container.appendChild(alertBox);\n\n  // Create the image element.\n  var errorImageClass = imgClass;\n  if (!errorImageClass)\n  errorImageClass = \"img-item-not-found\";\n\n  var alertBoxImg = _document.createElement(\"div\");\n  alertBoxImg.className = \"alert-box-image \" + errorImageClass;\n  alertBox.appendChild(alertBoxImg);\n\n  // Create the title & message element.\n  var alertBoxMsg = _document.createElement(\"div\");\n  alertBoxMsg.className = \"alert-box-msg errors\";\n  alertBox.appendChild(alertBoxMsg);\n\n  for (var i = 0; i < errors.length; i++) {\n\n    var errorTitle = errors[i].header;\n    if (!errorTitle)\n    errorTitle = i18n.translate(\"Error\", { \"defaultValue\": \"Error\" });\n\n    var alertBoxTitle = _document.createElement(\"div\");\n    alertBoxTitle.className = \"alert-box-title errors\";\n    alertBoxTitle.textContent = errorTitle;\n    alertBoxMsg.appendChild(alertBoxTitle);\n\n    // Add message, there maybe a list of files at the end.\n    var alertBoxText = _document.createElement(\"div\");\n    alertBoxText.className = \"alert-box-text errors\";\n\n    var msg = errors[i].msg;\n    var result = this.extractList(msg);\n    if (result.list.length) {\n      var listElem = _document.createElement(\"div\");\n      var unorderedlist = this.generateListElement(result.list, _document);\n      listElem.appendChild(unorderedlist);\n\n      alertBoxText.textContent = result.msg;\n      alertBoxText.appendChild(listElem);\n    } else {\n      alertBoxText.textContent = msg;\n    }\n    alertBoxMsg.appendChild(alertBoxText);\n\n    // Add additional content\n    if (errors[i].hints) {\n      var hintsElement = _document.createElement(\"ul\");\n      hintsElement.className = \"alert-box-content\";\n      var hints = errors[i].hints;\n      for (var h = 0; h < hints.length; h++) {\n        var hint = hints[h];\n        if (!hint)\n        continue;\n\n        var hintElem = _document.createElement(\"li\");\n        hintsElement.appendChild(hintElem);\n\n        var result = this.extractList(hint);\n        if (result.list.length) {\n          var unorderedlist = this.generateListElement(result.list, _document);\n          hintsElement.appendChild(unorderedlist);\n        }\n        hintElem.innerHTML = result.msg;\n      }\n      alertBoxMsg.appendChild(hintsElement);\n    }\n  }\n\n  var alertBoxOK = _document.createElement(\"div\");\n  alertBoxOK.className = \"alert-box-ok\";\n  alertBoxOK.textContent = i18n.translate(\"OK\", { \"defaultValue\": \"OK\" });\n\n  var instance = { alertBox: alertBox, container: container };\n  alertBoxOK.addEventListener(\"click\", function (event) {\n    alertBox.style.visibility = \"hidden\";\n    container.removeChild(alertBox);\n    AlertBox.instances.splice(AlertBox.instances.indexOf(instance), 1);\n  });\n  alertBox.appendChild(alertBoxOK);\n\n  alertBox.style.visibility = \"visible\";\n\n  AlertBox.instances.push(instance);\n};\n\nAlertBox.extractList = function (msg) {\n  var result = {\n    \"msg\": msg,\n    \"list\": [] };\n\n\n  if (msg && msg.indexOf(\"<ul>\") != -1) {\n    var parts = msg.split(\"<ul>\");\n    result.msg = parts[0];\n\n    parts = parts[1].split(\"</ul>\");\n    result.list = parts[0].split(\", \");\n    if (result.list.length === 1) {\n      // There maybe no spaces. Try just comma.\n      result.list = parts[0].split(\",\");\n    }\n  }\n  return result;\n};\n\n\nAlertBox.generateListElement = function (list, _document) {\n  var unorderedlist = _document.createElement(\"ul\");\n  for (var l = 0; l < list.length; l++) {\n    var listElement = _document.createElement(\"li\");\n    listElement.textContent = list[l];\n    listElement.setAttribute('data-i18n', list[l]);\n    unorderedlist.appendChild(listElement);\n  }\n\n  return unorderedlist;\n};\n\n\n// static\nAlertBox.dismiss = function () {\n  // dismiss the topmost alert box\n  if (AlertBox.instances.length > 0) {\n    var instance = AlertBox.instances.pop();\n    instance.alertBox.style.visibility = \"hidden\";\n    instance.container.removeChild(instance.alertBox);\n    return true;\n  }\n  return false;\n};","// extracted by mini-css-extract-plugin","function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}\nimport { EventDispatcher } from \"../application/EventDispatcher\";\nimport { i18n } from \"../globalization/i18next\";\nimport { isTouchDevice, isIE11 } from \"../compat\";\nimport { GlobalManagerMixin } from \"../application/GlobalManagerMixin\";\n\nvar Hammer = require('../../thirdparty/hammer/hammer.js');\n\n/** @constructor */\nexport function OptionSlider(caption, min, max, parentTbody, options) {\n\n  var self = this;\n  this.tbody = parentTbody;\n\n  var atIndex = options && options.insertAtIndex ? options.insertAtIndex : -1;\n  this.hideStepper = options && options.hideStepper;\n  var hideCaption = options && options.hideCaption;\n  this.sliderRow = this.tbody.insertRow(atIndex);\n  this.sliderRow.classList.add(\"switch-slider-row\");\n\n  var _document = this.getDocument();\n  var cell = this.sliderRow.insertCell(0);\n  this.caption = _document.createElement(\"div\");\n  this.caption.setAttribute(\"data-i18n\", caption);\n  this.caption.textContent = i18n.translate(caption);\n  if (hideCaption) this.caption.style.display = \"none\";\n  cell.appendChild(this.caption);\n\n  cell = this.sliderRow.insertCell(1);\n  this.sliderElement = _document.createElement(\"input\");\n  this.sliderElement.type = \"range\";\n  this.sliderElement.id = caption + \"_slider\";\n  this.sliderElement.min = min;\n  this.sliderElement.max = max;\n  this.sliderElement.style.width = \"85%\";\n  cell.appendChild(this.sliderElement);\n\n  cell = this.sliderRow.insertCell(2);\n\n  this.stepperElement = _document.createElement(\"input\");\n  this.stepperElement.type = \"number\";\n  this.stepperElement.id = caption + \"_stepper\";\n  this.stepperElement.min = min;\n  this.stepperElement.max = max;\n  this.stepperElement.step = 1;\n  this.stepperElement.style.width = \"64px\";\n  if (this.hideStepper) this.stepperElement.style.display = \"none\";\n  cell.appendChild(this.stepperElement);\n\n  this.blockEvent = false;\n\n  this.stepperElement.addEventListener(\"change\",\n  function (e) {\n    if (e.target != self.sliderElement)\n    self.sliderElement.value = self.stepperElement.value;\n    self.fireChangeEvent();\n  }, false);\n\n  function changeHandler(e) {\n    if (e.target != self.stepperElement)\n    self.stepperElement.value = self.sliderElement.value;\n    self.fireChangeEvent();\n  }\n\n  this.sliderElement.addEventListener(\"change\", changeHandler, false);\n  this.sliderElement.addEventListener(\"input\", changeHandler, false);\n};\n\nOptionSlider.prototype.constructor = OptionSlider;\nEventDispatcher.prototype.apply(OptionSlider.prototype);\n\nOptionSlider.prototype.fireChangeEvent = function () {\n  if (!this.blockEvent) {\n    this.value = this.sliderElement.value;\n    var e = new CustomEvent(\"change\", {\n      detail: {\n        target: this,\n        value: this.sliderElement.value } });\n\n\n    this.dispatchEvent(e);\n  }\n};\n\nOptionSlider.prototype.setValue = function (v) {\n  this.blockEvent = true;\n  this.value = v;\n  this.sliderElement.value = v;\n  this.stepperElement.value = v;\n  this.blockEvent = false;\n};\n\nOptionSlider.prototype.setDisabled = function (v) {\n  this.sliderElement.disabled = v;\n  this.stepperElement.disabled = v;\n  this.caption.disabled = v;\n};\n\nGlobalManagerMixin.call(OptionSlider.prototype);\n\n//==========================================================================================================\n//==========================================================================================================\n//==========================================================================================================\n\n/** @constructor */\nexport function OptionCheckbox(caption, parentTbody, initialState, description, globalManager, options) {\n\n  var self = this;\n  this.tbody = parentTbody;\n\n  var atIndex = options && options.insertAtIndex ? options.insertAtIndex : -1;\n  this.sliderRow = this.tbody.insertRow(atIndex);\n  this.sliderRow.classList.add(\"switch-slider-row\");\n\n  var _document = this.getDocument();\n  var cell = this.sliderRow.insertCell(0);\n  this.caption = _document.createElement(\"div\");\n  this.caption.setAttribute(\"data-i18n\", caption);\n  this.caption.textContent = i18n.translate(caption);\n\n  cell.appendChild(this.caption);\n\n  cell = this.sliderRow.insertCell(1);\n\n  if (description) {\n    this.description = _document.createElement(\"div\");\n    this.description.setAttribute(\"data-i18n\", description);\n    this.description.textContent = i18n.translate(description);\n\n    cell.appendChild(this.description);\n    cell = this.sliderRow.insertCell(2);\n  }\n\n  var label = _document.createElement(\"label\");\n  label.classList.add(\"switch\");\n\n  this.checkElement = _document.createElement(\"input\");\n  this.checkElement.type = \"checkbox\";\n  this.checkElement.id = caption + \"_check\";\n  this.checkElement.checked = initialState;\n  label.appendChild(this.checkElement);\n\n  var div = _document.createElement(\"div\");\n  div.classList.add(\"slider\");\n  label.appendChild(div);\n\n  cell.appendChild(label);\n\n  this.blockEvent = false;\n  this.checked = initialState;\n\n  this.checkElement.addEventListener(\"change\",\n  function (e) {\n    self.fireChangeEvent();\n  }, false);\n\n  if (isTouchDevice()) {\n    // Tap on a checkbox is handled by the browser so we don't hav to do anything for it.\n\n    this.sliderRowHammer = new Hammer.Manager(this.sliderRow, {\n      recognizers: [[Hammer.Tap]],\n      handlePointerEventMouse: false,\n      inputClass: isIE11 ? Hammer.PointerEventInput : Hammer.TouchInput });\n\n    this.sliderRowHammer.on(\"tap\", function (e) {\n      e.preventDefault();\n      //e.stopPropagation(); // Doesn't exist for tap events.\n      e.target.click();\n    });\n  }\n\n  this.checkElement.addEventListener(\"click\", function (event) {\n    event.stopPropagation();\n  }, false);\n\n  // Make the slider row clickable as well so that when\n  // clicking on the row, the checkbox is toggled.\n  this.sliderRow.addEventListener(\"click\",\n  function (e) {\n    if (!self.checkElement.disabled) {\n      self.checkElement.checked = !self.checkElement.checked;\n      self.fireChangeEvent();\n    }\n  }, false);\n}\n\nOptionCheckbox.prototype.constructor = OptionCheckbox;\nEventDispatcher.prototype.apply(OptionCheckbox.prototype);\nGlobalManagerMixin.call(OptionCheckbox.prototype);\n\nOptionCheckbox.prototype.fireChangeEvent = function () {\n  if (!this.blockEvent) {\n    this.checked = this.checkElement.checked;\n    var e = new CustomEvent(\"change\", {\n      detail: {\n        target: this,\n        value: this.checkElement.checked } });\n\n\n    this.dispatchEvent(e);\n  }\n};\n\n\nOptionCheckbox.prototype.setChecked = function (check) {\n  if (this.checkElement.checked != check)\n  {\n    this.checkElement.checked = check;\n    this.fireChangeEvent();\n  };\n};\n\nOptionCheckbox.prototype.setValue = function (v) {\n  this.blockEvent = true;\n  this.checked = v;\n  this.checkElement.checked = v;\n  this.blockEvent = false;\n};\n\nOptionCheckbox.prototype.getValue = function () {\n  var v = this.checkElement.checked;\n  return v;\n};\n\n\nOptionCheckbox.prototype.setDisabled = function (v) {\n  this.checkElement.disabled = v;\n  this.caption.disabled = v;\n};\n\nOptionCheckbox.prototype.setVisibility = function (isVisible) {\n  if (isVisible)\n  this.sliderRow.style.display = \"table-row\";else\n\n  this.sliderRow.style.display = \"none\";\n};\n\n\n//==========================================================================================================\n//==========================================================================================================\n//==========================================================================================================    \n/** @constructor */\nexport function OptionLabel(caption, parentTbody, globalManager, options) {\n\n\n  this.tbody = parentTbody;\n\n  var atIndex = options && options.insertAtIndex ? options.insertAtIndex : -1;\n  this.sliderRow = this.tbody.insertRow(atIndex);\n\n  var _document = this.getDocument();\n  var cell = this.sliderRow.insertCell(0);\n  this.caption = _document.createElement(\"div\");\n  this.caption.setAttribute(\"data-i18n\", caption);\n  this.caption.textContent = i18n.translate(caption);\n  cell.appendChild(this.caption);\n\n  cell.colSpan = \"3\";\n\n  this.blockEvent = false;\n\n  /**\r\n                            * Removes the label from DOM.\r\n                            */\n  this.removeFromParent = function () {\n    this.tbody.removeChild(this.sliderRow);\n    this.tbody = null;\n    this.sliderRow = null;\n    this.caption = null;\n  };\n}\n\nGlobalManagerMixin.call(OptionLabel.prototype);\n\n//==========================================================================================================\n//==========================================================================================================\n//==========================================================================================================\n\nexport function OptionButton(caption, parentTbody, globalManager, options) {\n\n\n  this.tbody = parentTbody;\n\n  var atIndex = options && options.insertAtIndex ? options.insertAtIndex : -1;\n  this.sliderRow = this.tbody.insertRow(atIndex);\n\n  this.sliderRow.insertCell(); // discard first\n  var cell = this.sliderRow.insertCell();\n  this.sliderRow.insertCell(); // discard third\n\n  var _document = this.getDocument();\n  this.caption = _document.createElement(\"div\");\n  this.caption.setAttribute(\"data-i18n\", caption);\n  this.caption.textContent = i18n.translate(caption);\n  this.caption.classList.add('adsk-button');\n  this.caption.classList.add('table-button');\n  cell.appendChild(this.caption);\n\n\n  /**\r\n                                   * Removes the button from DOM.\r\n                                   */\n  this.removeFromParent = function () {\n    this.tbody.removeChild(this.sliderRow);\n    if (this._onClick) {\n      this.caption.removeEventListener('click', this._onClick);\n      this._onClick = null;\n    }\n    this.tbody = null;\n    this.sliderRow = null;\n    this.caption = null;\n  };\n\n  /**\r\n      * Registers a click callback.\r\n      * @param {function} onClick - click function callback.\r\n      */\n  this.setOnClick = function (onClick) {\n    this._onClick = onClick;\n    this.caption.addEventListener('click', onClick, false);\n  };\n}\n\nGlobalManagerMixin.call(OptionButton.prototype);\n\n//==========================================================================================================\n//==========================================================================================================\n//==========================================================================================================\n\nexport function OptionDropDown(caption, parentTbody, items, initialItemIndex, envtab, globalManager, options) {\n\n\n  var self = this;\n  this.tbody = parentTbody;\n\n  var atIndex = options && options.insertAtIndex ? options.insertAtIndex : -1;\n  this.sliderRow = this.tbody.insertRow(atIndex);\n\n  var _document = this.getDocument();\n  this.dropdownElement = _document.createElement(\"select\");\n  this.dropdownElement.id = caption + \"_dropdown\";\n  this.dropdownElement.classList.add(\"option-drop-down\");\n\n  for (var i = 0; i < items.length; i++) {\n    var item = _document.createElement(\"option\");\n    item.value = i;\n    item.setAttribute(\"data-i18n\", items[i]);\n    item.textContent = i18n.translate(items[i]);\n    this.dropdownElement.add(item);\n  }\n\n  this.selectedIndex = this.dropdownElement.selectedIndex = initialItemIndex;\n\n  var cell = this.sliderRow.insertCell(0);\n  this.caption = _document.createElement(\"div\");\n  this.caption.setAttribute(\"data-i18n\", caption);\n  this.caption.textContent = i18n.translate(caption);\n  cell.appendChild(this.caption);\n\n  if (envtab) {\n    cell.colSpan = \"2\";\n\n    this.sliderRow = this.tbody.insertRow(atIndex);\n    var cell = this.sliderRow.insertCell(0);\n    cell.appendChild(this.dropdownElement);\n    cell.colSpan = \"2\";\n    this.dropdownElement.classList.add('tabcell');\n  } else\n  {\n    var cell = this.sliderRow.insertCell(1);\n    cell.appendChild(this.dropdownElement);\n  }\n\n  cell.style.paddingLeft = (options && options.paddingLeft !== undefined ? options.paddingLeft : 5) + 'px';\n  cell.style.paddingRight = (options && options.paddingRight !== undefined ? options.paddingRight : 5) + 'px';\n  this.blockEvent = false;\n\n  this.dropdownElement.addEventListener(\"change\",\n  function (e) {\n    self.fireChangeEvent();\n  }, false);\n}\n\nOptionDropDown.prototype.constructor = OptionDropDown;\nEventDispatcher.prototype.apply(OptionDropDown.prototype);\n\n\nOptionDropDown.prototype.setSelectedIndex = function (index) {\n  this.blockEvent = true;\n  this.selectedIndex = this.dropdownElement.selectedIndex = index;\n  this.blockEvent = false;\n};\n\nOptionDropDown.prototype.setSelectedValue = function (value) {\n  this.blockEvent = true;\n  this.dropdownElement.selectedValue = value;\n  this.selectedIndex = this.dropdownElement.selectedIndex;\n  this.blockEvent = false;\n};\n\nOptionDropDown.prototype.fireChangeEvent = function () {\n  if (!this.blockEvent) {\n    this.selectedIndex = this.dropdownElement.selectedIndex;\n    var e = new CustomEvent(\"change\", {\n      detail: {\n        target: this,\n        value: this.selectedIndex } });\n\n\n    this.dispatchEvent(e);\n  }\n};\n\nOptionDropDown.prototype.setDisabled = function (v) {\n  this.dropdownElement.disabled = v;\n  this.caption.disabled = v;\n};\n\nGlobalManagerMixin.call(OptionDropDown.prototype);\n\n//==========================================================================================================\n//==========================================================================================================\n//==========================================================================================================\n\n/**\r\n * Creates a footer element to add to this DockingPanel. Footer provides a resize handler.\r\n * Call this method during initialize() if a standard title bar is desired, and then add it to an existing container.\r\n * @returns {HTMLElement} The created footer.\r\n */\nexport function ResizeFooter(container, resizeCallback, globalManager) {\n\n  this.resizeCallback = resizeCallback;\n  var _document = this.getDocument();\n  var footer = _document.createElement('div');\n  footer.classList.add('docking-panel-footer');\n\n  var resizer = _document.createElement(\"div\");\n  resizer.classList.add(\"docking-panel-footer-resizer\");\n\n  footer.appendChild(resizer);\n\n  var iniUpdate = false;\n  var iniPanelSize = container.getBoundingClientRect();\n  var iniMousePosition = { x: 0, y: 0 };\n\n  var resizeOverlay = _document.createElement('div');\n  resizeOverlay.classList.add('adsk-viewing-viewer');\n  resizeOverlay.classList.add('docking-panel-resize-overlay');\n\n  var onMouseDown = function onMouseDown(event) {\n    iniUpdate = true;\n    iniPanelSize = container.getBoundingClientRect();\n    var _document = this.getDocument();\n    _document.body.appendChild(resizeOverlay);\n\n    this.addDocumentEventListener('touchmove', onMouseMove);\n    this.addDocumentEventListener('touchcancel', _onMouseUp);\n    this.addDocumentEventListener('touchend', _onMouseUp);\n    this.addDocumentEventListener('mousemove', onMouseMove);\n    this.addDocumentEventListener('mouseup', _onMouseUp);\n\n    event.preventDefault();\n    event.stopPropagation();\n  };\n  onMouseDown = onMouseDown.bind(this);\n\n  var _onMouseUp = function onMouseUp(event) {\n    var _document = this.getDocument();\n    if (_document.body.contains(resizeOverlay)) {\n      _document.body.removeChild(resizeOverlay);\n\n      this.removeDocumentEventListener('touchmove', onMouseMove);\n      this.removeDocumentEventListener('touchcancel', _onMouseUp);\n      this.removeDocumentEventListener('touchend', _onMouseUp);\n      this.removeDocumentEventListener('mousemove', onMouseMove);\n      this.removeDocumentEventListener('mouseup', _onMouseUp);\n\n      event.preventDefault();\n      event.stopPropagation();\n    }\n  };\n  _onMouseUp = _onMouseUp.bind(this);\n\n  var onMouseMove = function onMouseMove(event) {\n    if (event.type === 'touchmove') {\n      event.canvasX = event.touches[0].screenX;\n      event.canvasY = event.touches[0].screenY;\n    }\n    if (iniUpdate) {\n      iniUpdate = false;\n      iniMousePosition.x = event.canvasX || event.clientX;\n      iniMousePosition.y = event.canvasY || event.clientY;\n    }\n\n    var dx = (event.canvasX || event.clientX) - iniMousePosition.x;\n    var dy = (event.canvasY || event.clientY) - iniMousePosition.y;\n\n    var width = parseInt(iniPanelSize.width + dx);\n    var height = parseInt(iniPanelSize.height + dy);\n\n    container.style.width = width + 'px';\n    container.style.height = height + 'px';\n\n    this.resizeCallback && this.resizeCallback(width, height);\n\n    event.preventDefault();\n    event.stopPropagation();\n  };\n  onMouseMove = onMouseMove.bind(this);\n\n  resizer.addEventListener('touchstart', onMouseDown);\n  resizer.addEventListener('mousedown', onMouseDown);\n\n  container.style.resize = 'none';\n  container.appendChild(footer);\n\n  this.footer = footer;\n  this.resizer = resizer;\n}\n\nGlobalManagerMixin.call(ResizeFooter.prototype);\n\n//==========================================================================================================\n//==========================================================================================================\n//==========================================================================================================\n\nexport function OptionRow(caption, parentTbody, description, globalManager, options) {\n\n  this.tbody = parentTbody;\n\n  var atIndex = options && options.insertAtIndex ? options.insertAtIndex : -1;\n  this.sliderRow = this.tbody.insertRow(atIndex);\n  this.sliderRow.classList.add(\"switch-slider-row\");\n  // this.sliderRow.classList.add(\"switch-slider-row\");\n\n  var _document = this.getDocument();\n  var cell = this.sliderRow.insertCell(0);\n  this.caption = _document.createElement(\"div\");\n  this.caption.setAttribute(\"data-i18n\", caption);\n  this.caption.textContent = i18n.translate(caption);\n\n  cell.appendChild(this.caption);\n\n  cell = this.sliderRow.insertCell(1);\n\n  if (description) {\n    this.description = _document.createElement(\"div\");\n    this.description.setAttribute(\"data-i18n\", description);\n    this.description.textContent = i18n.translate(description);\n\n    cell.appendChild(this.description);\n    cell = this.sliderRow.insertCell(2);\n  }\n}\n\nGlobalManagerMixin.call(OptionRow.prototype);\n\n\n//==========================================================================================================\n//==========================================================================================================\n//==========================================================================================================\n\nexport var SimpleList = /*#__PURE__*/function () {\n\n  function SimpleList(parentDiv, renderListItemFn, onClick) {_classCallCheck(this, SimpleList);\n\n    this._parentDiv = parentDiv;\n    this._renderRowFn = renderListItemFn;\n    this._onClickFn = onClick;\n    this._onRowClick = this._onRowClick.bind(this);\n\n    var _document = this.getDocument();\n    var container = _document.createElement('div');\n    container.classList.add('settings-container');\n\n    this._parentDiv.appendChild(container);\n    this._myContainer = container;\n    this._myContainer.addEventListener(\"click\", this._onRowClick, { capture: true });\n\n    var envRow = _document.createElement('div');\n    envRow.classList.add('settings-table');\n    this._rowsContainer = envRow;\n    container.appendChild(envRow);\n  }_createClass(SimpleList, [{ key: \"setData\", value: function setData(\n\n    items, selectionIndex) {\n      this._removeAllRows();\n      this._items = items;\n      for (var i = 0; i < items.length; ++i) {\n        this._addRow(i);\n      }\n      this._updateSelection(selectionIndex);\n    }\n\n    // Removes from DOM.\n  }, { key: \"removeFromParent\", value: function removeFromParent() {\n      this._myContainer.removeEventListener(\"click\", this._onRowClick, { capture: true });\n      this._removeAllRows();\n      this._parentDiv.removeChild(this._myContainer);\n      this._parentDiv = null;\n      this._myContainer = null;\n      this._rowsContainer = null;\n      this._onClickFn = null;\n      this._items = null;\n    }\n\n    // @private\n  }, { key: \"_addRow\", value: function _addRow(index) {\n\n      var item = this._items[index];\n      var _document = this.getDocument();\n      var cell = _document.createElement(\"div\");\n\n      this._renderRowFn(cell, item, { domDocument: _document });\n\n      cell.setAttribute('data-index', index);\n      this._rowsContainer.appendChild(cell);\n    }\n\n    // @private\n  }, { key: \"_removeAllRows\", value: function _removeAllRows() {\n      var rows = this._rowsContainer.children;\n      while (rows.length) {\n        this._rowsContainer.removeChild(rows[0]);\n      }\n    }\n\n    // @private\n  }, { key: \"_updateSelection\", value: function _updateSelection(index) {\n      var table = this._myContainer;\n      var cells = this._rowsContainer.children;\n      for (var i = 0; i < cells.length; i++) {\n        var cell = cells[i];\n        if (i === index) {\n          cell.classList.add(\"border-select\");\n        } else {\n          cell.classList.remove(\"border-select\");\n        }\n      }\n    }\n\n    /**\r\n       * Click handler, routes call to method provided.\r\n       * @private\r\n       */ }, { key: \"_onRowClick\", value: function _onRowClick(\n    event) {\n      var domElem = event.target;\n      var attrValue;\n\n      // find the actual row element by traversing up\n      while (domElem !== this._myContainer) {\n        attrValue = domElem.getAttribute('data-index');\n        if (attrValue) {\n          break;\n        }\n        domElem = domElem.parentNode;\n      }\n      if (attrValue) {\n        var index = parseInt(attrValue);\n        this._onClickFn(index);\n      }\n    } }]);return SimpleList;}();\n\n\n\nGlobalManagerMixin.call(SimpleList.prototype);","// extracted by mini-css-extract-plugin","\nimport { isTouchDevice } from \"../compat\";\nimport { logger } from \"../logger/Logger\";\nimport { i18n } from \"../globalization/i18next\";\nimport { GlobalManagerMixin } from '../application/GlobalManagerMixin';\nimport { EventUtils } from \"../application/EventUtils\";\n\n\n/** @constructor */\nexport function ContextMenu(viewer) {\n  this.viewer = viewer;\n  this.setGlobalManager(viewer.globalManager);\n  this.menus = [];\n  this.container = null;\n  this.open = false;\n  this._onDOMevent = this._onDOMevent.bind(this);\n}\n\nContextMenu.prototype.constructor = ContextMenu;\nGlobalManagerMixin.call(ContextMenu.prototype);\n\nContextMenu.prototype.show = function (event, menu) {\n  var viewport = this.viewer.container.getBoundingClientRect();\n\n  // Normalize Hammer events\n  if (Array.isArray(event.changedPointers) && event.changedPointers.length > 0) {\n    event.clientX = event.changedPointers[0].clientX;\n    event.clientY = event.changedPointers[0].clientY;\n  }\n\n  var x = event.clientX - viewport.left;\n  var y = event.clientY - viewport.top;\n\n  if (!this.open) {\n    this.showMenu(menu, x, y);\n    this.open = true;\n  }\n\n  // Remember mouse coords.\n  this._startX = event.clientX;\n  this._startY = event.clientY;\n};\n\nContextMenu.prototype.showMenu = function (menu, x, y, shiftLeft) {var _this = this;\n\n  var menuItem;\n  var submenus = [];\n\n  var _document = this.getDocument();\n  // Create a menu container of the size of the viewer to eat the next click event\n  // to close the menu.\n  var container = _document.createElement('div');\n  container.style.left = '0';\n  container.style.top = '0';\n  container.style.width = '100%';\n  container.style.height = '100%';\n  container.style.position = 'absolute';\n  container.style.zIndex = '10';\n\n  var menuDiv = _document.createElement('div');\n  menuDiv.classList.add('menu');\n  menuDiv.classList.add('docking-panel');\n  menuDiv.classList.add('docking-panel-container-solid-color-a');\n  container.appendChild(menuDiv);\n\n  this.viewer.container.appendChild(container);\n  this.container = container;\n\n  this.menus.push(menuDiv);\n\n  var addExpandDiv = false;\n\n  for (var i = 0; i < menu.length; ++i) {\n    var defn = menu[i],\n    title = defn.title,\n    target = defn.target,\n    icon = defn.icon,\n    shortcut = defn.shortcut;\n\n    var hasChildren = Array.isArray(target);\n\n    if (hasChildren && !menu.isChild) {\n      addExpandDiv = true; // Keep track of any item that is expandable\n    } else {\n      // As described in the design, limit the the number of menu levels to two.\n      // We will flatten the target array\n      hasChildren = false;\n    }\n\n    menuItem = this.createMenuItem(title, icon, shortcut, hasChildren);\n    menuDiv.appendChild(menuItem);\n\n    if (typeof target === 'function') {\n      this.addCallbackToMenuItem(menuItem, target);\n    } else if (hasChildren) {\n      submenus.push({ menuItem: menuItem, target: target });\n    } else {\n      logger.warn(\"Invalid context menu option:\", title, target);\n    }\n  }\n\n  // If there weren't any context menu's with expandable submenus, remove the expand div.\n  if (!addExpandDiv) {\n    var children = menuDiv.children;\n    for (var _i = 0; _i < children.length; _i++) {\n      var item = children[_i];\n      var expandDiv = item.getElementsByClassName('menu-item-expand')[0];\n      item.removeChild(expandDiv);\n    }\n  }\n\n  var rect = menuDiv.getBoundingClientRect(),\n  menuDivWidth = rect.width,\n  menuDivHeight = rect.height,\n  viewerRect = this.viewer.container.getBoundingClientRect(),\n  viewerWidth = viewerRect.width,\n  viewerHeight = viewerRect.height;\n\n  shiftLeft = !!shiftLeft || isTouchDevice() && !this.viewer.navigation.getUseLeftHandedInput();\n\n  if (shiftLeft) {\n    x -= menuDivWidth;\n  }\n\n  if (x < 0) {\n    x = 0;\n  }\n  if (viewerWidth < x + menuDivWidth) {\n    x = viewerWidth - menuDivWidth;\n    if (x < 0) {\n      x = 0;\n    }\n  }\n\n  if (y < 0) {\n    y = 0;\n  }\n  if (viewerHeight < y + menuDivHeight) {\n    y = viewerHeight - menuDivHeight;\n    if (y < 0) {\n      y = 0;\n    }\n  }\n\n  menuDiv.style.top = Math.round(y) + \"px\";\n  menuDiv.style.left = Math.round(x) + \"px\";\n\n  var reorderMenuItems = function reorderMenuItems(menuItem, showExpand) {\n    var expanded = menuItem.getElementsByClassName('menu-item-expand');\n\n    // Remove the expand arrow\n    menuItem.removeChild(expanded[0]);\n\n    var icons = menuItem.getElementsByClassName('menu-item-icon');\n    // Reorder the icon\n    icons.length > 0 && menuItem.insertBefore(icons[0], menuItem.childNodes[menuItem.length - 1]);\n\n    // Append the expand arrow to the left.\n    _this.setMenuExpand(menuItem, true, showExpand);\n  };\n\n  var moveLeft = false;\n  for (i = 0; i < submenus.length; ++i) {\n    var submenu = submenus[i];\n\n    menuItem = submenu.menuItem;\n    var _rect = menuItem.getBoundingClientRect();\n    var _viewerRect = this.viewer.container.getBoundingClientRect();\n\n    var tolerance = _rect.right - _rect.left;\n    moveLeft = _viewerRect.right - _rect.right < tolerance || shiftLeft;\n\n    if (moveLeft) {\n      reorderMenuItems(menuItem, true);\n    }\n\n    x = Math.round((moveLeft ? _rect.left : _rect.right) - _viewerRect.left);\n    y = Math.round(_rect.top - _viewerRect.top);\n\n    this.addSubmenuCallbackToMenuItem(menuItem, submenu.target, x, y, moveLeft);\n  }\n\n  // Move the expand div to the front. \n  // This will remove the extra padding from the right side of the the context menu\n  if (submenus.length > 0 && moveLeft) {\n    var _children = menuDiv.children;\n    for (var _i2 = 0; _i2 < _children.length; _i2++) {\n      var _item = _children[_i2];\n      if (_item.children[2].className.indexOf('menu-item-expand') !== -1) {\n        reorderMenuItems(_item, false);\n      }\n    }\n  }\n\n  this.container.addEventListener('touchend', this._onDOMevent);\n  this.container.addEventListener('mousedown', this._onDOMevent);\n  this.container.addEventListener('mouseup', this._onDOMevent);\n  if (!isTouchDevice()) {\n    this.container.addEventListener('mousemove', this._onDOMevent);\n  }\n};\n\n\n/**\n    * @private\n    */\nContextMenu.prototype._onDOMevent = function (event) {\n  var eventType = event.type;\n  switch (eventType) {\n\n    case 'touchend':\n      if (!this._isContextMenu(event)) {\n        this.hide();\n      }\n      break;\n\n    case 'mousedown':\n      this._startX = event.clientX;\n      this._startY = event.clientY;\n      break;\n\n    case 'mouseup':\n      if (!this._isContextMenu(event)) {\n        this.hide();\n        if (EventUtils.isRightClick(event) &&\n        event.clientX === this._startX &&\n        event.clientY === this._startY)\n        {\n          this.viewer.triggerContextMenu(event);\n        }\n      }\n      break;\n    case 'mousemove':\n      // Used when hovering over menu item with submenu.\n      if (!this.currentItem || this.menus.length < 2) {\n        break;\n      }\n\n      var isInsideMenuItem = this._isInside(event, this.currentItem);\n      var isInsideSubmenu = this._isInside(event, this.menus[1]);\n\n      // Hide menu if mouse is not on submenu or on the menu item\n      if (!isInsideMenuItem && !isInsideSubmenu) {\n        // Hide the extra menu\n        this.hideMenu(this.menus[1]);\n        this.currentItem.style.backgroundColor = null;\n        this.currentItem = null;\n      } else if (this.currentItem.backgroundColor) {\n        // Highlight the menu item ff the cursor is inside of the menu item or the submenu.\n        this.currentItem.style.backgroundColor = this.currentItem.backgroundColor;\n      }\n      break;}\n\n\n};\n\n\n/**\n    * @param text - the menu item description\n    * @param icon (optional) - className: a CSS class with a content field referencing an icon\n    * @param shortcut (optional) - the menu item keyboard shortcut\n    * @param {boolean} [expand=false] - if set to true add arrow to expand\n    * @returns menuItem - div element containing the menu item elements\n    */\nContextMenu.prototype.createMenuItem = function (text, icon, shortcut) {var expand = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : false;\n  var _document = this.getDocument();\n  var menuItem = _document.createElement(\"div\");\n  menuItem.className = \"menu-item\";\n  shortcut = shortcut || '';\n\n  this.setMenuItemIcon(menuItem, icon);\n  this.setMenuItemText(menuItem, text);\n  this.setMenuExpand(menuItem, false, expand);\n  this.setMenuItemShortcut(menuItem, shortcut);\n  return menuItem;\n};\n\nContextMenu.prototype.setMenuItemIcon = function (menuItem, iconClass) {\n  var _document = this.getDocument();\n  var menuItemIcon = _document.createElement(\"div\");\n  menuItemIcon.classList.add(\"menu-item-icon\");\n\n  if (iconClass) {\n    menuItemIcon.classList.add(iconClass);\n  }\n\n  menuItem.appendChild(menuItemIcon);\n};\n\nContextMenu.prototype.setMenuItemText = function (menuItem, text) {\n  var _document = this.getDocument();\n  var menuItemText = _document.createElement(\"div\");\n  menuItemText.classList.add(\"menu-item-text\");\n  menuItemText.setAttribute(\"data-i18n\", text);\n  menuItemText.textContent = i18n.translate(text);\n  menuItem.appendChild(menuItemText);\n};\n\nContextMenu.prototype.setMenuItemShortcut = function (menuItem, shortcut) {\n  var _document = this.getDocument();\n  var menuItemShortcut = _document.createElement(\"div\");\n  menuItemShortcut.classList.add(\"menu-item-shortcut\");\n  menuItemShortcut.textContent = shortcut;\n  menuItem.appendChild(menuItemShortcut);\n};\n\nContextMenu.prototype.setMenuExpand = function (menuItem, shiftLeft, show) {\n  var _document = this.getDocument();\n  var menuItemExpand = _document.createElement('div');\n  menuItemExpand.classList.add('menu-item-expand');\n  if (shiftLeft) {\n    // Rotate the arrow image and insert it as the first element\n    menuItemExpand.style.transform = 'scale(-1)';\n    menuItem.insertBefore(menuItemExpand, menuItem.childNodes[0]);\n  } else {\n    menuItem.appendChild(menuItemExpand);\n  }\n  var opacity = show | 0;\n  menuItemExpand.style.opacity = opacity;\n};\n\nContextMenu.prototype.addCallbackToMenuItem = function (menuItem, target) {\n  var that = this;\n\n  menuItem.addEventListener('click', function (event) {\n    that.hide();\n    target();\n    event.preventDefault();\n    return false;\n  }, false);\n};\n\nContextMenu.prototype.addSubmenuCallbackToMenuItem = function (menuItem, menu, x, y, shiftLeft) {\n  var that = this;\n  menu.isChild = true;\n  if (isTouchDevice()) {\n    menuItem.addEventListener(\n    'click',\n    function () {\n      that.open = true;\n      that.currentItem = menuItem;\n      that.showMenu(menu, x, y, shiftLeft);\n    },\n    false);\n\n  } else {\n    // Used when hovering over the context menu item.\n    menuItem.addEventListener(\n    'mouseenter',\n    function () {\n      var isInside = that._isInside(event, menuItem);\n      if (isInside) {\n        that.open = true;\n        that.currentItem = menuItem;\n\n        // Keep track of the background color when hovering over the submenu item.\n        var _window = that.getWindow();\n        var backgroundColor = _window.\n        getComputedStyle(that.currentItem).\n        getPropertyValue('background-color');\n        that.currentItem.backgroundColor = backgroundColor;\n        that.showMenu(menu, x, y, shiftLeft);\n      }\n    },\n    false);\n\n  }\n};\n\nContextMenu.prototype.hideMenu = function (menu) {var _this2 = this;\n  var hideContainer = function hideContainer(container) {\n    container.removeEventListener('touchend', _this2._onDOMevent);\n    container.removeEventListener('mousedown', _this2._onDOMevent);\n    container.removeEventListener('mouseup', _this2._onDOMevent);\n    if (!isTouchDevice()) {\n      container.removeEventListener('mousemove', _this2._onDOMevent);\n    }\n    container.parentNode.removeChild(container);\n  };\n\n  if (menu && this.menus.indexOf(menu) !== -1 && menu.parentNode) {\n    hideContainer(menu.parentNode);\n    this.menus.splice(this.menus.indexOf(menu), 1);\n  }\n\n  if (this.menus.length === 0) {\n    this.open = false;\n    this.container = null;\n  } else if (this.menus.length === 1) {\n    this.container = this.menus[0].parentNode;\n  }\n};\n\nContextMenu.prototype.hide = function () {\n  if (this.open) {\n    while (this.menus.length > 0) {\n      this.hideMenu(this.menus[0]);\n    }\n    return true;\n  }\n  return false;\n};\n\n\n/**\n    * Returns true when the event occurs on top of the context menu.\n    * @private\n    */\nContextMenu.prototype._isContextMenu = function (event) {\n  // Iterate over all of the menus\n  for (var i = 0; i < this.menus.length; i++) {\n    var menuDiv = this.menus[i];\n    var curr = event.target;\n\n    while (curr !== this.container) {\n      if (curr === menuDiv) return true;\n      curr = curr.parentNode;\n    }\n  }\n  return false;\n};\n\n/**\n    * Returns true if the event's mouse position intersects the item's bounding box.\n    * @param {Event} event \n    * @param {HTMLElement} item \n    * @private\n    */\nContextMenu.prototype._isInside = function (event, item) {\n  var viewport = this.viewer.container.getBoundingClientRect();\n\n  // Normalize Hammer events\n  if (Array.isArray(event.changedPointers) && event.changedPointers.length > 0) {\n    event.clientX = event.changedPointers[0].clientX;\n    event.clientY = event.changedPointers[0].clientY;\n  }\n\n  var x = Math.ceil(event.clientX - viewport.left);\n  var y = Math.ceil(event.clientY - viewport.top);\n\n  var itemBB = item.getBoundingClientRect();\n\n  var top = Math.floor(itemBB.top - viewport.top);\n  var bottom = Math.ceil(itemBB.bottom - viewport.top);\n  var left = Math.floor(itemBB.left - viewport.left);\n  var right = Math.ceil(itemBB.right - viewport.left);\n\n  return y >= top && y <= bottom && x >= left && x <= right;\n};","// extracted by mini-css-extract-plugin","'use strict';\n\nimport './DataTable.css'; // IMPORTANT!!\n\nvar Clusterize = require('clusterize.js');\nvar avu = Autodesk.Viewing.UI;\nvar AGGREGATE_MIN = 'MIN';\nvar AGGREGATE_MAX = 'MAX';\nvar AGGREGATE_SUM = 'SUM';\nvar AGGREGATE_AVG = 'AVG';\nvar AGGREGATE_COUNT = 'COUNT';\n/**\n                                * UI component in LMV that can be added into the DockingPanels to create custom tables\n                                * @constructor\n                                * @alias Autodesk.Viewing.UI.DataTable\n                                * @param {Autodesk.Viewing.UI.DockingPanel} dockingPanel  Instance of the Docking Panel\n                                */\nexport function DataTable(dockingPanel) {\n\n  if (!(dockingPanel instanceof avu.DockingPanel)) {\n    throw new Error('Invalid docking panel');\n  }\n  this.dockingPanel = dockingPanel;\n\n  var _document = this.dockingPanel.getDocument();\n  this.datatableDiv = _document.createElement(\"div\");\n  this.datatableDiv.setAttribute('id', 'datatable');\n  this.datatableDiv.setAttribute('class', 'datatable');\n  dockingPanel.container.appendChild(this.datatableDiv);\n\n  if (dockingPanel.footerInstance) {\n    // set the resize handler\n    dockingPanel.footerInstance.resizeCallback = this._fitHeaderColumns.bind(this);\n  }\n  this.groupedByColumn = false;\n  this.aggregated = false;\n}\n\n/**\n   * Creates the table column\n   * @param {Array} columndata - The dataset in array and represents the column data\n   * @private \n   */\nDataTable.prototype._createColumns = function (columndata) {\n  var _document = this.dockingPanel.getDocument();\n  var columnDiv = _document.createElement('div');\n  columnDiv.setAttribute('id', 'columnArea');\n  columnDiv.setAttribute('class', 'clusterize-headers');\n  var table =\n  '<table id=\"headersArea\">' +\n  '<thead>' +\n  '<tr id =\"columnRow\">' +\n  '</tr>' +\n  '</thead>' +\n  '</table>';\n\n  columnDiv.innerHTML = table;\n  this.datatableDiv.appendChild(columnDiv);\n\n  var tRow = columnDiv.querySelector('tr');\n  columndata.forEach(function (cellDaata) {\n    var cell = _document.createElement('th');\n    cell.appendChild(_document.createTextNode(cellDaata));\n    tRow.appendChild(cell);\n  });\n  table = this.datatableDiv.querySelector('table');\n  this._makeTableSortable(table);\n};\n\n/**\n    * Creates the table rows\n    * @private\n    */\nDataTable.prototype._createRows = function () {\n  var _document = this.dockingPanel.getDocument();\n  var rowDiv = _document.createElement('div');\n  var html =\n  '<div id=\"scrollArea\" class=\"clusterize-scroll\">' +\n  '<table id=\"bodyArea\" class=\"table-striped\">' +\n  '<tbody id=\"contentArea\" class=\"clusterize-content\">' +\n  '<tr class=\"clusterize-no-data\">' +\n  '<td>Loading data…</td>' +\n  '</tr>' +\n  '</tbody>' +\n  '</table>' +\n  '</div>';\n  rowDiv.innerHTML = html;\n  this.datatableDiv.appendChild(rowDiv);\n};\n\n/**\n    * Sets the table data\n    * @param {Array<Array[]>} rowdata - The dataset in array of arrays and represents a set of rows\n    * @param {Array} columndata - The dataset in array and represents the column data\n    * @alias Autodesk.Viewing.UI.DataTable#setData\n    */\nDataTable.prototype.setData = function (rowdata, columndata) {\n  // Check if the column length is same as the row length\n  if (columndata.length !== rowdata[0].length)\n  throw new Error('Column length should be same as the row length');\n\n  // Separate the column and row data\n  this._createColumns(columndata);\n  this._createRows();\n\n  var self = this;\n  this.rowData = rowdata;\n  this.clusterize = new Clusterize({\n    rows: this.rowData.map(function (row) {\n      return \"<tr>\" +\n      row.map(function (col) {\n        return '<td>' + col + '</td>';\n      }).join(\" \") +\n      \"</tr>\";\n    }),\n    scrollId: 'scrollArea',\n    contentId: 'contentArea',\n    callbacks: {\n      clusterChanged: function clusterChanged() {\n        self._fitHeaderColumns();\n        self._syncHeaderWidth();\n        if (self.groupedByColumn)\n        self._updateClusterGroup();\n      } } });\n\n\n\n  /**\n              * Update header left offset on scroll\n              */\n  var scroll = this.datatableDiv.querySelector('.clusterize-scroll');\n  scroll.addEventListener('scroll', function () {\n    var scrollLeft = this.scrollLeft;\n    setHeaderLeftMargin(scrollLeft);\n  });\n  var setHeaderLeftMargin = function setHeaderLeftMargin(scrollLeft) {\n    var headers = self.datatableDiv.querySelector('#headersArea');\n    headers.style.setProperty('margin-left', -scrollLeft + 'px');\n  };\n};\n\n/**\n    * Destroys the table instance\n    * @alias Autodesk.Viewing.UI.DataTable#destroyTable\n    */\nDataTable.prototype.destroyTable = function () {\n  this.clusterize.destroy(true);\n  this.clusterize = null;\n  this.rowData = null;\n  this.groupedByColumn = false;\n};\n\n/**\n    * Make the table sortable for the given table\n    * @param {*} table - table data\n    * @private\n    */\nDataTable.prototype._makeTableSortable = function (table) {\n  var self = this;\n  var th = table.tHead,i;\n  th && th.rows[0] && (th = th.rows[0].cells);\n  if (th) {\n    i = th.length;\n  } else {\n    return; // if no `<thead>` then do nothing\n  }\n  // Loop through every <th> inside the header\n  while (--i >= 0) {\n    (function (i) {\n      var dir = 1;\n\n      // Append click listener to sort\n      th[i].addEventListener('click', function () {\n        self._sortTable(i, dir = 1 - dir);\n      });\n    })(i);\n  }\n};\n\n/**\n    * Sorts based on the column data\n    * @param {Number} col - column index\n    * @param {Number} reverse - reverse index\n    * @private\n    */\nDataTable.prototype._sortTable = function (col, reverse) {\n  var tr = this.rowData,i;\n\n  if (!this.sortFunction) {\n    this.restoreDefaultSortFunction();\n  }\n  var sortFunc = this.sortFunction && this.sortFunction.bind(this);\n  tr = tr.sort(sortFunc(col, reverse));\n\n  var rows = tr.map(function (row) {\n    return \"<tr>\" +\n    row.map(function (col) {\n      return '<td>' + col + '</td>';\n    }).join(\" \") +\n    \"</tr>\";\n  });\n  this.clusterize.update(rows);\n\n  var table = this.datatableDiv.querySelector('#bodyArea');\n  if (!table.classList.contains('table-striped'))\n  table.classList.add('table-striped');\n};\n\n/**\n    * API to set the custom sorting function\n    * @param {Function} sortFunc - custom sort function for the table dataset\n    * @alias Autodesk.Viewing.UI.DataTable#setSortFunction\n    */\nDataTable.prototype.setSortFunction = function (sortFunc) {\n  this.sortFunction = sortFunc;\n};\n\n/**\n    * API to get the custom sorting function\n    * @returns {function} custom sort function set by the setSortFunction method\n    * @alias Autodesk.Viewing.UI.DataTable#getSortFunction\n    */\nDataTable.prototype.getSortFunction = function () {\n  return this.sortFunction;\n};\n\n/**\n    * API to set the default sorting function\n    * @alias Autodesk.Viewing.UI.DataTable#restoreDefaultSortFunction\n    */\nDataTable.prototype.restoreDefaultSortFunction = function () {\n  var defaultSortFunc = function defaultSortFunc(col, reverse) {\n    reverse = -(+reverse || -1);\n    return function (a, b) {\n      return reverse *\n      a[col].localeCompare(b[col]);\n\n    };\n  };\n  this.sortFunction = defaultSortFunc;\n};\n\n/**\n    * Get the group by given column\n    * @param {Number} col - column index\n    * @returns {number[]} rowGroups - an array of grouped data, where each group contains numbers that represent the row-indices of the original table dataset.\n    * @alias Autodesk.Viewing.UI.DataTable#getGroupByColumn\n    */\nDataTable.prototype.getGroupByColumn = function (col) {\n  var rowData = this.rowData;\n  var rowGroups = {};\n  for (var i = 0; i < rowData.length; i++) {\n    var row = rowData[i];\n    var id = row[col];\n    if (!rowGroups[id]) rowGroups[id] = [];\n    rowGroups[id].push(i);\n  }\n  return rowGroups;\n};\n\n/**\n    * Group by given column\n    * @param {Number} col - column index\n    * @alias Autodesk.Viewing.UI.DataTable#groupByColumn\n    */\nDataTable.prototype.groupByColumn = function (col) {var _this = this;\n  var rowData = this.rowData;\n  var rowGroups = {};\n  for (var i = 0; i < rowData.length; i++) {\n    var row = rowData[i];\n    var id = row[col];\n    if (!rowGroups[id]) rowGroups[id] = [];\n    if (rowGroups[id].length > 0) {\n      row = \"<tr class= 'subrow'>\" + row.map(function (col) {\n        return '<td>' + col + '</td>';\n      }).join(\" \") +\n      \"</tr>\";\n    } else {var\n\n      html;(function () {var rowLen = row.length;html =\n        '<span value=\"click\">' +\n        '</span>';\n        row = \"<tr class= 'parentrow'>\" + row.map(function (col, i) {\n          if (rowLen === i + 1) {\n            return '<td>' + col + html + '</td>';\n          } else {\n            return '<td>' + col + '</td>';\n          }\n        }).join(\" \") +\n        \"</tr>\";})();\n    }\n    rowGroups[id].push(row);\n  }\n\n  var rowSet = [];\n  for (var _id in rowGroups) {\n    var group = rowGroups[_id];\n    for (var j = 0; j < group.length; j++) {\n      var row = group[j];\n      rowSet.push(row);\n    }\n  }\n  this.clusterize.update(rowSet);\n\n  var table = this.datatableDiv.querySelector('#bodyArea');\n  if (table.classList.contains('table-striped'))\n  table.classList.remove('table-striped');\n\n  this.datatableDiv.querySelectorAll('.subrow').forEach(function (subRow) {\n    _this._slideDown(subRow);\n    subRow.style.fontSize = 14 + 'px';\n  });\n\n  var _fitHeaderColumns = this._fitHeaderColumns.bind(this);\n  var _expandContent = this._expandContent.bind(this);\n  this.datatableDiv.querySelectorAll('span').forEach(function (row) {\n    row.addEventListener('click', function (event) {\n      _expandContent(this, event);\n      _fitHeaderColumns();\n    });\n  });\n\n  this._fitHeaderColumns();\n  if (!this.groupedByColumn) this.groupedByColumn = true;\n};\n\n/**\n    * Updates the clusterize\n    * @private\n    */\nDataTable.prototype._updateClusterGroup = function () {var _this2 = this;\n  var _fitHeaderColumns = this._fitHeaderColumns.bind(this);\n  var _expandContent = this._expandContent.bind(this);\n  this.datatableDiv.querySelectorAll('span').forEach(function (row) {\n    row.addEventListener('click', function (event) {\n      _expandContent(this, event);\n      _fitHeaderColumns();\n    });\n  });\n  this.datatableDiv.querySelectorAll('.subrow').forEach(function (subRow) {\n    _this2._slideDown(subRow);\n    subRow.style.fontSize = 14 + 'px';\n  });\n};\n\n/**\n    * Expand the content for group by column\n    * @private\n    */\nDataTable.prototype._expandContent = function (self, event) {\n  var collapsed = false;\n  if (self.className === 'collapsed') {\n    collapsed = true;\n  }\n  var fontSize = collapsed ? 14 : 0;\n  var closestTr = self.closest('tr');\n  var trSiblings = this._nextUntil(closestTr, ':not(.subrow)');\n  for (var i = 0; i < trSiblings.length; i++) {\n    this._slideToggle(trSiblings[i], 500);\n    trSiblings[i].style.fontSize = fontSize + 'px';\n  }\n  self.classList.toggle('collapsed');\n};\n\n/**\n    * Gives the next subsequent rows for the given html element\n    * @private\n    */\nDataTable.prototype._nextUntil = function (elem, selector, filter) {\n  var siblings = []; // Setup siblings array\n  elem = elem.nextElementSibling; // Get the next sibling element\n  while (elem) {\n    if (elem.matches(selector)) break;\n    if (filter && !elem.matches(filter)) {\n      elem = elem.nextElementSibling;\n      continue;\n    }\n    siblings.push(elem);\n    elem = elem.nextElementSibling;\n  }\n  return siblings;\n};\n\n/**\n    * Slide toggle - toggles between slide up and slide down for the given html element\n    * @private\n    */\nDataTable.prototype._slideToggle = function (element, duration) {\n  var _window = this.dockingPanel.getWindow();\n  if (_window.getComputedStyle(element).display === 'none') {\n    return this._slideDown(element, duration);\n  } else {\n    return this._slideUp(element, duration);\n  }\n};\n\n/**\n    * Slide up the given html element\n    * @private\n    */\nDataTable.prototype._slideUp = function (element, duration) {\n  element.style.transitionProperty = 'height, margin, padding';\n  element.style.transitionDuration = duration + 'ms';\n  element.style.boxSizing = 'border-box';\n  element.style.height = element.offsetHeight + 'px';\n  element.offsetHeight;\n  element.style.overflow = 'hidden';\n  element.style.height = 0;\n  element.style.paddingTop = 0;\n  element.style.paddingBottom = 0;\n  element.style.marginTop = 0;\n  element.style.marginBottom = 0;\n  // window.setTimeout( () => {\n  element.style.display = 'none';\n  element.style.removeProperty('height');\n  element.style.removeProperty('padding-top');\n  element.style.removeProperty('padding-bottom');\n  element.style.removeProperty('margin-top');\n  element.style.removeProperty('margin-bottom');\n  element.style.removeProperty('overflow');\n  element.style.removeProperty('transition-duration');\n  element.style.removeProperty('transition-property');\n  // }, duration);\n};\n\n/**\n    * Slides down the given html element\n    * @private\n    */\nDataTable.prototype._slideDown = function (element, duration) {\n  var _window = this.dockingPanel.getWindow();\n  element.style.removeProperty('display');\n  var display = _window.getComputedStyle(element).display;\n\n  if (display === 'none')\n  display = 'block';\n\n  element.style.display = display;\n  var height = 21 + 'px';\n  element.style.overflow = 'hidden';\n  element.style.height = 0;\n  element.style.paddingTop = 0;\n  element.style.paddingBottom = 0;\n  element.style.marginTop = 0;\n  element.style.marginBottom = 0;\n  element.offsetHeight;\n  element.style.boxSizing = 'border-box';\n  element.style.transitionProperty = \"height, margin, padding\";\n  element.style.transitionDuration = duration + 'ms';\n  element.style.height = height + 'px';\n  element.style.removeProperty('padding-top');\n  element.style.removeProperty('padding-bottom');\n  element.style.removeProperty('margin-top');\n  element.style.removeProperty('margin-bottom');\n  _window.setTimeout(function () {\n    element.style.removeProperty('height');\n    element.style.removeProperty('overflow');\n    element.style.removeProperty('transition-duration');\n    element.style.removeProperty('transition-property');\n  }, duration);\n};\n\n/**\n    * Get aggregation based on the type for the given column\n    * @param {String} type - type of aggregation\n    * @param {Number} col - column index\n    * @returns {String} the final result of the aggregation\n    * @alias Autodesk.Viewing.UI.DataTable#getAggregate\n    */\nDataTable.prototype.getAggregate = function (type, col) {\n  var rowData = this.rowData;\n  var value = null;\n\n  switch (type) {\n    case AGGREGATE_MIN:\n      value = getMin();\n      break;\n    case AGGREGATE_MAX:\n      value = getMax();\n      break;\n    case AGGREGATE_SUM:\n      value = getSum();\n      break;\n    case AGGREGATE_AVG:\n      value = getAvg();\n      break;\n    case AGGREGATE_COUNT:\n      value = getCount();}\n\n  return value;\n\n  function getMin() {\n    var minValue = rowData[0][col];\n    for (var i = 1; i < rowData.length; i++) {\n      if (minValue > rowData[i][col]) {\n        minValue = rowData[i][col];\n      }\n    }\n    return minValue ? minValue : 0;\n  }\n\n  function getMax() {\n    var maxValue = rowData[0][col];\n    for (var i = 1; i < rowData.length; i++) {\n      if (maxValue < rowData[i][col]) {\n        maxValue = rowData[i][col];\n      }\n    }\n    return maxValue ? maxValue : 0;\n  }\n\n  function getSum() {\n    var sumValue = 0;\n    for (var i = 0; i < rowData.length; i++) {\n      sumValue = sumValue + parseFloat(rowData[i][col]);\n    }\n    return sumValue ? sumValue : 0;\n  }\n\n  function getAvg() {\n    var avg = getSum() / rowData.length;\n    avg = parseFloat(avg);\n    return avg ? avg : 0;\n  }\n\n  function getCount() {\n    return rowData.length;\n  }\n};\n\n/**\n    * Aggregate based on the type for the given column\n    * @param {String} type - type of aggregation\n    * @param {Number} col - column index\n    * @alias Autodesk.Viewing.UI.DataTable#aggregate\n    */\nDataTable.prototype.aggregate = function (type, col) {\n  var content = this.datatableDiv.querySelector('.clusterize-content');\n  var firstRow = content.querySelector('tr:not(.clusterize-extra-row):not(.first)');\n  if (!firstRow) {\n    return;\n  }\n  var columnsWidth = [];\n\n  for (var i = 0; i < firstRow.children.length; i++) {\n    columnsWidth.push(firstRow.children[i].clientWidth);\n  }\n\n  var result = this.getAggregate(type, col);\n\n  if (!this.aggregated) {\n    var _document2 = this.dockingPanel.getDocument();\n    var aggregateDiv = _document2.createElement('div');\n    aggregateDiv.setAttribute('id', 'aggregate');\n    aggregateDiv.setAttribute('class', 'aggregate-headers');\n    var table =\n    '<table id=\"aggregateArea\">' +\n    '<tbody>' +\n    '</tbody>' +\n    '</table>';\n\n    aggregateDiv.innerHTML = table;\n    this.datatableDiv.appendChild(aggregateDiv);\n  }\n  // populate the cell data\n  var aggregatedTable = this.datatableDiv.querySelector('#aggregateArea');\n\n  // If the specified aggregation already exists for the specified column then just return\n  for (var k = 0; k < aggregatedTable.rows.length; k++) {\n    var cell = aggregatedTable.rows[k].cells[col];\n    if (cell.innerText.indexOf(type) > -1) {\n      return;\n    }\n  }\n  // If the specified aggregation doesn't already exist for the specified column then\n  // add it to the first available row\n  for (var p = 0; p < aggregatedTable.rows.length; p++) {\n    var emptyCell = aggregatedTable.rows[p].cells[col];\n    if (emptyCell.innerText.length === 0) {\n      emptyCell.appendChild(_document.createTextNode(type + ': '));\n      emptyCell.appendChild(_document.createTextNode(result));\n      return;\n    }\n  }\n  // If specified aggregation is performed for the first time then create a row\n  var tRow = aggregatedTable.insertRow(aggregatedTable.rows.length);\n  // Add the cell data based on the column that is aggregated\n  for (var j = 0; j < columnsWidth.length; j++) {\n    var newCell = _document.createElement('td');\n    tRow.appendChild(newCell);\n    newCell.style.setProperty('min-width', columnsWidth[j] + 'px', 'important');\n    if (j === col) {\n      newCell.appendChild(_document.createTextNode(type + ': '));\n      newCell.appendChild(_document.createTextNode(result));\n    }\n  }\n  this.aggregated = true;\n};\n\n/**\n    * Clears all the aggregations\n    * @alias Autodesk.Viewing.UI.DataTable#clearAggregates\n    */\nDataTable.prototype.clearAggregates = function () {\n  var aggregates = this.datatableDiv.querySelectorAll('.aggregate-headers');\n  for (var i = 0; i < aggregates.length; i++) {\n    aggregates[i].parentNode.removeChild(aggregates[i]);\n  }\n};\n\n/**\n    * Makes header columns width equal to content columns\n    * @private\n    */\nDataTable.prototype._fitHeaderColumns = function () {\n  var content = this.datatableDiv.querySelector('.clusterize-content');\n  var headers = this.datatableDiv.querySelector('#headersArea');\n  var firstRow = content.querySelector('tr:not(.clusterize-extra-row):not(.first)');\n  if (!firstRow) {\n    return;\n  }\n  var prevWidth = [];\n  var columnsWidth = [];\n\n  for (var i = 0; i < firstRow.children.length; i++) {\n    columnsWidth.push(firstRow.children[i].clientWidth);\n  }\n  if (columnsWidth.toString() == prevWidth.toString()) return;\n  var tRow = headers.querySelector('tr');\n  for (var j = 0; j < tRow.children.length; j++) {\n    tRow.children[j].style.setProperty('clientWidth', columnsWidth[j] + 'px', 'important');\n    tRow.children[j].style.setProperty('min-width', columnsWidth[j] + 'px', 'important');\n  }\n\n  if (this.aggregated) {\n    var aggregatedTable = this.datatableDiv.querySelector('#aggregateArea');\n    for (var k = 0; k < aggregatedTable.rows.length; k++) {\n      var aggRow = aggregatedTable.rows[k];\n      for (var p = 0; p < aggRow.children.length; p++) {\n        aggRow.children[p].style.setProperty('clientWidth', columnsWidth[p] + 'px', 'important');\n        aggRow.children[p].style.setProperty('min-width', columnsWidth[p] + 'px', 'important');\n      }\n    }\n  }\n  prevWidth = columnsWidth;\n};\n\n/**\n    * Make header width equal to the tbody\n    * @private\n    */\nDataTable.prototype._syncHeaderWidth = function () {\n  var content = this.datatableDiv.querySelector('.clusterize-content');\n  var headers = this.datatableDiv.querySelector('#headersArea');\n  headers.style.setProperty('clientWidth', content.width);\n  headers.style.setProperty('min-idth', content.width);\n};","// extracted by mini-css-extract-plugin","\nimport { i18n } from \"../globalization/i18next\";\nimport { ResizeFooter } from \"./CommonWidgets\";\nimport { GlobalManagerMixin } from '../application/GlobalManagerMixin';\n\n/**\n                                                                         * UI panel that is movable and resizable within the bounds of its parent container.\n                                                                         * @constructor\n                                                                         * @alias Autodesk.Viewing.UI.DockingPanel\n                                                                         * @param {HTMLElement} parentContainer - The container for this panel.\n                                                                         * @param {string} id - The id to assign this panel.\n                                                                         * @param {string} title - The title of this panel.\n                                                                         * @param {object=} [options] - An optional dictionary of options.\n                                                                         * @param {boolean} [options.localizeTitle=true] - When true, localization is attempted for the given title.\n                                                                         * @param {boolean} [options.addFooter=true] - When true, adds a footer to the panel with resizing handler.\n                                                                         * @example\n                                                                          // Example of a simple DockingPanel that displays the given content.\n                                                                          // The titlebar and move behavior are overridden in initialize(), which also\n                                                                          // creates a custom close button.\n                                                                          //\n                                                                          SimplePanel = function(parentContainer, id, title, content, x, y)\n                                                                          {\n                                                                              this.content = content;\n                                                                              Autodesk.Viewing.UI.DockingPanel.call(this, parentContainer, id, '');\n                                                                        \n                                                                              // Auto-fit to the content and don't allow resize.  Position at the coordinates given.\n                                                                              //\n                                                                              this.container.style.height = \"auto\";\n                                                                              this.container.style.width = \"auto\";\n                                                                              this.container.style.resize = \"none\";\n                                                                              this.container.style.left = x + \"px\";\n                                                                              this.container.style.top = y + \"px\";\n                                                                          };\n                                                                        \n                                                                          SimplePanel.prototype = Object.create(Autodesk.Viewing.UI.DockingPanel.prototype);\n                                                                          SimplePanel.prototype.constructor = SimplePanel;\n                                                                        \n                                                                          SimplePanel.prototype.initialize = function()\n                                                                          {\n                                                                              // Override DockingPanel initialize() to:\n                                                                              // - create a standard title bar\n                                                                              // - click anywhere on the panel to move\n                                                                              // - create a close element at the bottom right\n                                                                              //\n                                                                              this.title = this.createTitleBar(this.titleLabel || this.container.id);\n                                                                              this.container.appendChild(this.title);\n                                                                        \n                                                                              this.container.appendChild(this.content);\n                                                                              this.initializeMoveHandlers(this.container);\n                                                                        \n                                                                              this.closer = this.getDocument().createElement(\"div\");\n                                                                              this.closer.className = \"simplePanelClose\";\n                                                                              this.closer.textContent = \"Close\";\n                                                                              this.initializeCloseHandler(this.closer);\n                                                                              this.container.appendChild(this.closer);\n                                                                          };\n                                                                         */\nexport function DockingPanel(parentContainer, id, title, options) {\n\n  // Constants\n  this.kMinWdth = 100;\n  this.kMinHeight = 100;\n\n  this.visibilityCallbacks = [];\n  this.movedSinceLastClick = false;\n  this.movedSinceCreate = false;\n\n  this.parentContainer = parentContainer;\n\n  var _document = this.getDocument();\n  this.container = _document.createElement(\"div\");\n  this.container.id = id;\n  this.container.lastWidth = \"\";\n  this.container.dockRight = false;\n  this.container.dockBottom = false;\n  this.titleLabel = title;\n\n  // By default, localize the title.\n  //\n  options = options || {};\n\n  if (!options.hasOwnProperty('localizeTitle')) {\n    options.localizeTitle = true;\n  }\n\n  if (!options.hasOwnProperty('addFooter')) {\n    options.addFooter = true;\n  }\n\n  this.options = options;\n\n  this.container.classList.add('docking-panel');\n\n  parentContainer.appendChild(this.container);\n  this.listeners = [];\n\n  this.initialize();\n\n  this.setVisible(false);\n}\n\nGlobalManagerMixin.call(DockingPanel.prototype);\n\nDockingPanel.prototype.onSetGlobalManager = function (globalManager) {\n  // Objects created in constructor, like footerInstance,\n  // references the global-globalManager instance (wrong)\n  // instead of the viewer's. Here we set it to the right one\n  this.footerInstance && this.footerInstance.setGlobalManager(globalManager);\n};\n\n/**\n    * Creates the sub-elements of this DockingPanel.  Override this in derived classes.\n    * The default implementation is to create a title bar with the title or id provided\n    * in the constructor.  The title bar also acts as the move handler for the DockingPanel.\n    * Finally, a close button is added to the top right corner.\n    */\nDockingPanel.prototype.initialize = function () {\n  this.title = this.createTitleBar(this.titleLabel || this.container.id);\n  this.container.appendChild(this.title);\n  this.initializeMoveHandlers(this.title);\n  this.setTitle(this.titleLabel || this.container.id, this.options);\n\n  this.closer = this.createCloseButton();\n  this.container.appendChild(this.closer);\n\n  if (this.options.addFooter) {\n    this.footer = this.createFooter();\n    this.container.appendChild(this.footer);\n  }\n};\n\n/**\n    * Performs any clean up necessary.  This can include disconnecting UI elements, unregistering event callbacks, etc.\n    */\nDockingPanel.prototype.uninitialize = function () {\n  // Remove all of the listeners we're aware of.\n  //\n  for (var i = 0; i < this.listeners.length; ++i) {\n    var listener = this.listeners[i];\n    listener.target.removeEventListener(listener.eventId, listener.callback);\n  }\n  this.listeners = [];\n  this.visibilityCallbacks = [];\n\n  // Disconnect our DOM tree from our parent.\n  //\n  this.parentContainer.removeChild(this.container);\n  this.parentContainer = null;\n  this.container = null;\n  this.title = null;\n  this.closer = null;\n};\n\n/**\n    * Adds a callback to call when this DockingPanel changes visibility.\n    * @param {function} callback - A function that takes in a single boolean parameter\n    * indicating the current visibility state.\n    */\nDockingPanel.prototype.addVisibilityListener = function (callback) {\n  this.visibilityCallbacks.push(callback);\n};\n\n/**\n    * Sets the new visibility state of this DockingPanel.\n    * @param {boolean} show - The desired visibility state.\n    */\nDockingPanel.prototype.setVisible = function (show) {\n\n  if (show) {\n    var parentBox = this.getContainerBoundingRect();\n\n    if (this.container.dockRight) {\n      var screenw = parentBox.width;\n      var wi2 = 300;\n\n      var wi = this.container.lastWidth || this.container.style.width;\n      if (!wi)\n      wi = this.container.getBoundingClientRect().width;\n      if (wi)\n      wi2 = parseInt(wi);\n\n      this.container.style.left = screenw - wi2 + \"px\";\n    }\n    if (this.container.dockBottom) {\n      var screenh = parentBox.height;\n      var hi2 = 300;\n\n      var hi = this.container.lastHeight || this.container.style.height;\n      if (!hi)\n      hi = this.container.getBoundingClientRect().height;\n      if (hi)\n      hi2 = parseInt(hi);\n\n      var hi3 = screenh - hi2;\n      this.container.style.top = hi3 > 0 ? hi3 + \"px\" : 0;\n    }\n\n    this.container.style.maxHeight = parentBox.height + \"px\";\n    this.container.style.maxWidth = parentBox.width + \"px\";\n    this.container.style.display = \"block\";\n    this.bringToFront();\n  } else\n  {\n    this.container.lastWidth = this.container.style.width;\n    this.container.lastHeight = this.container.style.height;\n    this.container.style.display = \"none\";\n  }\n\n  for (var i = 0; i < this.visibilityCallbacks.length; i++) {\n    this.visibilityCallbacks[i](show);\n  }\n};\n\n/**\n    * Gets the new visibility state of this DockingPanel.\n    * @returns {boolean} Whether or not the panel is visible.\n    */\nDockingPanel.prototype.isVisible = function () {\n  return this.container.style.display === \"block\";\n};\n\n/**\n    * Notification that visibility has been changed by external sources.\n    */\nDockingPanel.prototype.visibilityChanged = function () {\n};\n\n/**\n    * Initializes the given HTMLDomElement as the move handle for this DockingPanel.\n    * When this element is clicked and dragged, this DockingPanel is moved.\n    *\n    * @param {HTMLElement} mover - The DOM element that will act as the move handle.\n    */\nDockingPanel.prototype.initializeMoveHandlers = function (mover) {\n  var x, y;\n  var lastX, lastY;\n  var startX, startY;\n  var deltaX, deltaY;\n  var container = this.container;\n  var self = this;\n\n  // This gets scoped under window during the handleMove event handler\n  function handleMove(e) {\n    var minWidth = container.style.minWidth ? parseInt(container.style.minWidth) : self.kMinWdth,\n    minHeight = container.style.minHeight ? parseInt(container.style.minHeight) : self.kMinHeight,\n    parentRect = self.getContainerBoundingRect();\n\n    if (container.style.maxWidth && parseInt(container.style.width) > parseInt(container.style.maxWidth)) {\n      container.style.width = container.style.maxWidth;\n    }\n    if (container.style.maxHeight && parseInt(container.style.height) > parseInt(container.style.maxHeight)) {\n      container.style.height = container.style.maxHeight;\n    }\n\n    if (parseInt(container.style.width) < minWidth) {\n      container.style.width = minWidth + \"px\";\n    }\n    if (parseInt(container.style.height) < minHeight) {\n      container.style.height = minHeight + \"px\";\n    }\n    if (e.type === \"touchmove\") {\n      e.screenX = e.touches[0].screenX;\n      e.screenY = e.touches[0].screenY;\n    }\n\n    deltaX += e.screenX - lastX;\n    deltaY += e.screenY - lastY;\n\n    x = startX + deltaX;\n    y = startY + deltaY;\n\n    var wi = parseInt(container.style.width);\n    var hi = parseInt(container.style.height);\n\n    if (isNaN(wi)) {\n      wi = self.container.getBoundingClientRect().width;\n    }\n    if (isNaN(hi)) {\n      hi = self.container.getBoundingClientRect().height;\n    }\n\n    // check left, top\n    if (x < 5)\n    x = 0;\n\n    if (y < 5)\n    y = 0;\n\n    container.dockRight = false;\n    container.dockBottom = false;\n\n    // check bottom, right\n    if (parentRect.width - 5 < x + wi) {\n      x = parentRect.width - wi;\n      container.dockRight = true;\n    }\n\n    if (parentRect.height - 5 < y + hi) {\n      y = parentRect.height - hi;\n      container.dockBottom = true;\n    }\n    /*\n              if (self.scrollContainer) {\n                  if (x == 0) {\n                      self.scrollContainer.classList.remove(\"right\");\n                      self.scrollContainer.classList.add(\"left\");\n                  }\n                  else {\n                      self.scrollContainer.classList.remove(\"left\");\n                      self.scrollContainer.classList.add(\"right\");\n                  }\n              }\n      */\n    container.style.left = x + \"px\";\n    container.style.top = y + \"px\";\n    container.style.maxWidth = parentRect.width - x + \"px\";\n    container.style.maxHeight = parentRect.height - y + \"px\";\n\n    //TODO: check for right side\n    //TODO: handle docking and bounds check against the canvas element\n\n    lastX = e.screenX;\n    lastY = e.screenY;\n\n    self.onMove(e, x, y);\n  }\n\n  function handleUp(e) {\n    self.removeWindowEventListener('mousemove', handleMove);\n    self.removeWindowEventListener('mouseup', handleUp);\n    self.removeWindowEventListener('touchmove', handleMove);\n    self.removeWindowEventListener('touchend', handleUp);\n    self.onEndMove(e, x, y);\n  }\n\n  function handleDown(e) {\n    if (e.type === \"touchstart\") {\n      e.screenX = e.touches[0].screenX;\n      e.screenY = e.touches[0].screenY;\n    }\n    lastX = e.screenX;\n    lastY = e.screenY;\n\n    deltaX = 0;\n    deltaY = 0;\n\n    // Save the current panel position relative to its parent container.\n    //\n    startX = self.container.offsetLeft;\n    startY = self.container.offsetTop;\n\n    self.addWindowEventListener('mousemove', handleMove, false);\n    self.addWindowEventListener('mouseup', handleUp, false);\n    self.addWindowEventListener('touchmove', handleMove, false);\n    self.addWindowEventListener('touchend', handleUp, false);\n\n    e.preventDefault();\n\n    self.onStartMove(e, startX, startY);\n  }\n\n  // We'll keep track of the mousedown event listener as this one is always active.\n  // The mousemove and mouseup listeners above are temporary so we don't need to track them.\n  //\n  self.addEventListener(mover, 'mousedown', handleDown);\n  self.addEventListener(mover, 'touchstart', handleDown);\n};\n\n/**\n    * Initializes the given HTMLDomElement as the close handle for this DockingPanel.\n    * When this element is clicked, this DockingPanel is hidden.\n    *\n    * @param {HTMLElement} closer - The DOM element that will act as the close handle.\n    */\nDockingPanel.prototype.initializeCloseHandler = function (closer) {\n  var self = this;\n  self.addEventListener(closer, 'click', function (e) {\n    self.setVisible(false);\n  }, false);\n};\n\n/**\n    * Creates a scroll container element to add to this DockingPanel.  Call this method during\n    * initialize() if a scroll container is needed. The function will create the scroll container\n    * and make it available via the \"scrollContainer\" property of the DockingPanel.\n    *\n    * @param {object} [options] - An optional dictionary of options.\n    * @param {boolean} [options.left=false] - When true, the scrollbar appears on the left.\n    * @param {number} [options.heightAdjustment=0] - The scroll container height is 100% of the panel\n    * minus the height adjustment. Provide a value to account for other elements in the panel like a title bar.\n    * @param {number} [options.marginTop=0] - The marginTop setting for the scroll container's CSS style, in pixels.\n    * @param {number} [options.scrollEaseCurve] - The easing function expressed as a 4-values array.\n    * @param {number} [options.scrollEaseSpeed] - The marginTop setting for the scroll container's CSS style, in pixels.\n    */\nDockingPanel.prototype.createScrollContainer = function (options) {\n  var _document = this.getDocument();\n  var scrollContainer = _document.createElement(\"div\"),\n  classList = scrollContainer.classList;\n  classList.add('docking-panel-scroll');\n  classList.add('docking-panel-container-solid-color-a');\n  classList.add(options && options.left ? 'left' : 'right');\n\n  if (options && options.heightAdjustment) {\n    scrollContainer.style.height = \"calc(100% - \" + options.heightAdjustment + \"px)\";\n  }\n\n  if (options && options.marginTop) {\n    scrollContainer.style.marginTop = options.marginTop + \"px\";\n  }\n\n  scrollContainer.id = this.container.id + '-scroll-container';\n\n  this.container.appendChild(scrollContainer);\n  this.scrollContainer = scrollContainer;\n  this.scrollEaseCurve = options && options.scrollEaseCurve || [0, 0, .29, 1];\n  this.scrollEaseSpeed = options && options.scrollEaseSpeed || 0.003;\n\n  return scrollContainer; //for backwards compatibility we still return that, though it's no longer documented that way.\n};\n\n/**\n    * Creates a title bar element to add to this DockingPanel. Call this method during\n    * initialize() if a standard title bar is desired, and then add it to an existing container.\n    * @param {string} title - The text to use in the title bar.\n    * @returns {HTMLElement} The created title bar.\n    */\nDockingPanel.prototype.createTitleBar = function (title) {\n  var _document = this.getDocument();\n  var titleBar = _document.createElement(\"div\");\n  titleBar.classList.add(\"docking-panel-title\");\n  titleBar.textContent = title;\n\n  var that = this;\n  that.addEventListener(titleBar, 'click', function (event) {\n    if (!that.movedSinceLastClick) {\n      that.onTitleClick(event);\n    }\n    that.movedSinceLastClick = false;\n  });\n\n  that.addEventListener(titleBar, 'mousedown', function (event) {\n    that.bringToFront();\n  });\n\n  that.addEventListener(titleBar, 'dblclick', function (event) {\n    that.onTitleDoubleClick(event);\n  });\n\n  return titleBar;\n};\n\n/**\n    * Creates a footer element to add to this DockingPanel. Footer provides a resize handler. \n    * Call this method during initialize() if a standard title bar is desired, and then add it to an existing container.\n    * @returns {HTMLElement} The created footer.\n    */\nDockingPanel.prototype.createFooter = function () {\n  var footer = new ResizeFooter(this.container);\n  footer.setGlobalManager(this.globalManager);\n  this.footerInstance = footer;\n  this.container.style.resize = 'none';\n  return footer.footer;\n};\n\n/**\n    * Sets the title for this panel.\n    *\n    * @param {string} text - The title for this panel.\n    * @param {Object} [options] - An optional dictionary of options.\n    * @param {boolean} [options.localizeTitle=false] - When true, localization is attempted for the given text.\n    */\nDockingPanel.prototype.setTitle = function (text, options) {\n  if (options && options.localizeTitle) {\n    this.title.setAttribute('data-i18n', text);\n    text = i18n.translate(text);\n  } else {\n    this.title.removeAttribute('data-i18n');\n  }\n  this.title.textContent = text;\n};\n\n/**\n    * Creates a close button to add to this DockingPanel.  When clicked, this DockingPanel\n    * is hidden.  Call this method during initialize() if a standard close button is desired,\n    * and then add it to an existing container.\n    *\n    * @returns {HTMLElement} The created close button.\n    */\nDockingPanel.prototype.createCloseButton = function () {\n  var _document = this.getDocument();\n  var closeButton = _document.createElement(\"div\");\n  closeButton.className = \"docking-panel-close\";\n  this.initializeCloseHandler(closeButton);\n  return closeButton;\n};\n\n/**\n    * Override this event to be notified when this panel begins a move operation.\n    *\n    * @param {MouseEvent} event - The mousedown event.\n    * @param {number} startX - The starting x position of the panel in pixels.\n    * @param {number} startY - The starting y position of the panel in pixels.\n    */\nDockingPanel.prototype.onStartMove = function (event, startX, startY) {\n};\n\n/**\n    * Override this event to be notified when this panel ends a move operation.\n    *\n    * @param {MouseEvent} event - The mouseup event.\n    * @param {number} endX - The ending x position of the panel in pixels.\n    * @param {number} endY - The ending y position of the panel in pixels.\n    */\nDockingPanel.prototype.onEndMove = function (event, endX, endY) {\n};\n\n/**\n    * Override this to be notified when this panel is moved.  Note, do not forget to call\n    * this base class method in the overriding method.\n    *\n    * @param {MouseEvent} event - The mousemove event.\n    * @param {number} currentX - The current x position of the panel in pixels.\n    * @param {number} currentY - The current y position of the panel in pixels.\n    */\nDockingPanel.prototype.onMove = function (event, currentX, currentY) {\n  this.movedSinceLastClick = true;\n  this.movedSinceCreate = true;\n};\n\n/**\n    * Override this method to be notified when the user clicks on the title.\n    * @param {Event} event\n    */\nDockingPanel.prototype.onTitleClick = function (event) {\n};\n\n/**\n    * Override this method to be notified when the user double-clicks on the title.\n    * @param {Event} event\n    */\nDockingPanel.prototype.onTitleDoubleClick = function (event) {\n};\n\n/**\n    * Adds an event listener to a given target that has an addEventListener(event, callback) API.\n    * These event listeners are tracked by the DockingPanel and are automatically removed on uninitialize.\n    *\n    * @param {object} target - The target that will fire the event.\n    * @param {string} eventId - The event to be listened to.\n    * @param {function} callback - The callback to execute when the event is fired.\n    */\nDockingPanel.prototype.addEventListener = function (target, eventId, callback) {\n  target.addEventListener(eventId, callback);\n  this.listeners.push({ target: target, eventId: eventId, callback: callback });\n};\n\n/**\n    * Removes an existing event listener added using DockingPanel.addEventListener.\n    *\n    * @param {object} target - The target with the event listener.\n    * @param {string} eventId - The id of the event being listened to.\n    * @param {function} callback - The callback executed when the event is fired.\n    * @returns {boolean} True if the listener was removed successfully; false otherwise.\n    */\nDockingPanel.prototype.removeEventListener = function (target, eventId, callback) {\n  for (var i = 0; i < this.listeners.length; ++i) {\n    var listener = this.listeners[i];\n    if (listener.target === target && listener.eventId === eventId && listener.callback === callback) {\n      target.removeEventListener(eventId, callback);\n      this.listeners.splice(i, 1);\n      return true;\n    }\n  }\n  return false;\n};\n\n/**\n    * Override this method to return the width and height to use when resizing the panel to the content.\n    * @returns {object} `{height: number, width: number}`.\n    */\nDockingPanel.prototype.getContentSize = function () {\n  return { height: this.container.clientHeight, width: this.container.clientWidth };\n};\n\n/**\n    * Resizes the panel to the current content.  Currently this only works on height.\n    * @param {object} [options] - An optional dictionary of options.\n    * @param {number} [options.maxHeight] - The maximum height to resize this panel.\n    */\nDockingPanel.prototype.resizeToContent = function (options) {\n\n  if (!this.isVisible())\n  return;\n\n  var dimensions = this.getContentSize(),\n  newHeight = dimensions.height,\n  panelRect = this.container.getBoundingClientRect(),\n  parentRect = this.getContainerBoundingRect();\n\n  // Add footer size.\n  var footer = this.container.querySelector('.docking-panel-footer');\n  if (footer) {\n    newHeight += footer.getBoundingClientRect().height;\n  }\n\n  var toolbarHeight = 75; // hardcoded clearance for the toolbar at the bottom\n\n  var maxHeight = parentRect.height;\n  maxHeight -= panelRect.top - parentRect.top + toolbarHeight;\n\n  if (options && options.maxHeight !== undefined) {\n    maxHeight = Math.min(maxHeight, options.maxHeight);\n  }\n\n  if (newHeight > maxHeight) {\n    newHeight = maxHeight;\n  }\n\n  // TODO: Once toolbar can be positioned anywhere, we will also need to\n  // do the same for the width.\n  this.container.style.maxHeight = maxHeight.toString() + 'px';\n  this.container.style.height = newHeight.toString() + 'px';\n};\n\n/**\n    * Returns the parent's container bounding rectangle.\n    * @returns {ClientRect} Bounding rectangle of the parent.\n    */\nDockingPanel.prototype.getContainerBoundingRect = function () {\n  return this.parentContainer.getBoundingClientRect();\n};\n\n/**\n    * \n    * @param {Number} startY - Starting scrolling position\n    * @param {Number} endY - Starting ending position\n    * @param {Options} [callbackFn] - Callback function with a single (y:Number) argument\n    */\nDockingPanel.prototype.animateScroll = function (startY, endY, callbackFn) {\n\n  function cubicBezier(p, t) {\n    var cy = 3.0 * p[1];\n    var by = 3.0 * (p[3] - p[1]) - cy;\n    var ay = 1.0 - cy - by;\n\n    return ((ay * t + by) * t + cy) * t;\n  }\n\n  var _easeCurve = this.scrollEaseCurve;\n  var _easeSpeed = this.scrollEaseSpeed;\n  var scrollContainer = this.scrollContainer;\n\n  function tickScroll(now) {\n\n    var t = (now - begin) * _easeSpeed;\n    t = Math.min(t, 1.0);\n    var te = cubicBezier(_easeCurve, t);\n\n    var y = startY + (endY - startY) * te;\n    scrollContainer.scrollTop = y;\n    callbackFn && callbackFn(y);\n\n    if (t < 1.0)\n    requestAnimationFrame(tickScroll);\n  }\n\n  // Schedule to next frame\n  var begin = performance.now();\n  requestAnimationFrame(tickScroll);\n};\n\n/**\n    * Handles the panel's resize logic. Invoked automatically every time\n    *  `Autodesk.Viewing.FULLSCREEN_MODE_EVENT` gets fired.\n    * Override in classes that extend `DockingPanel` to add custom behavior.\n    * @param {number} vt - Top pixel position \n    * @param {number} vb - Bottom pixel position \n    * @param {number} vl - Left pixel position \n    * @param {number} vr - Left pixel position \n    * @param {number} vr - Right pixel position \n    * @param {number} vw - Width in pixels \n    * @param {number} vh - Height in pixels \n    * @returns {boolean} true if changes are made by the callback. Can be used for code that extends `DockingPanel` and overrides this method.\n    */\nDockingPanel.prototype.onViewerResize = function (vt, vb, vl, vr, vw, vh) {\n\n  var panel = this.container;\n  var panelRect = panel.getBoundingClientRect();\n  var pw = panelRect.width;\n  var ph = panelRect.height;\n\n\n  if (!pw || !ph)\n  return false;\n\n  var pt = panelRect.top;\n  var pb = panelRect.bottom;\n  var pl = panelRect.left;\n  var pr = panelRect.right;\n\n  // Panel width should not be greater than viewer width.\n  //\n  if (vw < pw) {\n    pw = Math.round(vw);\n    panel.style.width = pw + \"px\";\n  }\n\n  // Panel height should not be greater than viewer height.\n  //\n  if (vh < ph) {\n    ph = Math.round(vh);\n    panel.style.height = ph + \"px\";\n  }\n\n  // Adjust horizontally if panel extends beyond right edge of viewer or panel is docked.\n  //\n  if (vr < pr || panel.dockRight) {\n    pl = Math.round(vr - pw - vl);\n    panel.style.left = pl + \"px\";\n  }\n\n  // Adjust vertically if panel extends beyond bottom edge of viewer or panel is docked.\n  //\n  if (vb < pb || panel.dockBottom) {\n    pt = Math.round(vb - ph - vt);\n    if (pt < 0) {\n      pt = 0;\n    }\n    panel.style.top = pt + \"px\";\n  }\n\n  // Set panel max width/height based upon viewer width/height.\n  //\n  panel.style.maxWidth = Math.round(vw) + \"px\";\n  panel.style.maxHeight = Math.round(vh) + \"px\";\n\n  return true;\n};\n\n\n/**\n    * Makes this panel show up in front of all other ones.\n    */\nDockingPanel.prototype.bringToFront = function () {\n  // appendChild() resets the scrolling back to zero. Therefore...\n  var scrollValue = this.scrollContainer ? this.scrollContainer.scrollTop : 0;\n  this.parentContainer.appendChild(this.container);\n  this.scrollContainer && (this.scrollContainer.scrollTop = scrollValue);\n};","function _typeof(obj) {\"@babel/helpers - typeof\";if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {_typeof = function _typeof(obj) {return typeof obj;};} else {_typeof = function _typeof(obj) {return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;};}return _typeof(obj);}\nimport { AlertBox } from \"./AlertBox\";\nimport { logger } from \"../logger/Logger\";\nimport { i18n } from \"../globalization/i18next\";\nimport { getWebGLHelpLink } from \"../envinit\";\n\n\nvar ErrorInfoData = {\n  // UNKNOWN FAILURE\n  1: { 'img': \"img-reload\", // \"icons/error_reload_in_viewer.png\",\n    'globalized-msg': \"Viewer-UnknownFailure\",\n    'default-msg': \"<title> Sorry </title>\" +\n    \"<message>We seem to have some technical difficulties and couldn't complete your request.</message>\" +\n    \"<hint>Try loading the item again. </hint>\" +\n    \"<hint>Please verify your Internet connection, and refresh the browser to see if that fixes the problem.</hint>\" },\n\n\n  // BAD DATA\n  2: { 'img': \"img-unsupported\", // \"icons/error_unsupported_file_type.png\",\n    'globalized-msg': \"Viewer-BadData\",\n    'default-msg': \"<title> Sorry </title>\" +\n    \"<message>The item you are trying to view was not processed completely. </message>\" +\n    \"<hint>Try loading the item again.</hint>\" +\n    \"<hint>Please upload the file again to see if that fixes the issue.</hint>\" },\n\n\n  // NETWORK ERROR\n  3: { 'img': \"img-reload\", // \"icons/error_reload_in_viewer.png\",\n    'globalized-msg': \"Viewer-NetworkError\",\n    'default-msg': \"<title> Sorry </title>\" +\n    \"<message>We seem to have some technical difficulties and couldn't complete your request.</message>\" +\n    \"<hint> Try loading the item again.</hint>\" +\n    \"<hint> Please verify your Internet connection, and refresh the browser to see if that fixes the problem.</hint>\" },\n\n\n  // NETWORK_ACCESS_DENIED\n  4: { 'img': \"img-unlock\", // \"icons/error_unlock_upload.png\",\n    'globalized-msg': \"Viewer-AccessDenied\",\n    'default-msg': \"<title> No access </title>\" +\n    \"<message>Sorry. You don’t have the required privileges to access this item.</message>\" +\n    \"<hint> Please contact the author</hint>\" },\n\n\n  // NETWORK_FILE_NOT_FOUND\n  5: { 'img': \"img-item-not-found\", //\"icons/error_item_not_found.png\",\n    'globalized-msg': \"Viewer-FileNotFound\",\n    'default-msg': \"<title> Sorry </title>\" +\n    \"<message>We can’t display the item you are looking for. It may not have been processed yet. It may have been moved, deleted, or you may be using a corrupt file or unsupported file format.</message>\" +\n    \"<hint> Try loading the item again.</hint>\" +\n    \"<hint> Please upload the file again to see if that fixes the issue.</hint>\" +\n    '<hint> <a href=\"http://help.autodesk.com/view/ADSK360/ENU/?guid=GUID-488804D0-B0B0-4413-8741-4F5EE0FACC4A\" target=\"_blank\">See a list of supported formats.</a></hint>' },\n\n\n  // NETWORK_SERVER_ERROR\n  6: { 'img': \"img-reload\", // \"icons/error_reload_in_viewer.png\",\n    'globalized-msg': \"Viewer-ServerError\",\n    'default-msg': \"<title> Sorry </title>\" +\n    \"<message>We seem to have some technical difficulties and couldn't complete your request.</message>\" +\n    \"<hint> Try loading the item again.</hint>\" +\n    \"<hint> Please verify your Internet connection, and refresh the browser to see if that fixes the problem.</hint>\" },\n\n\n\n  // NETWORK_UNHANDLED_RESPONSE_CODE\n  7: { 'img': \"img-reload\", // \"icons/error_reload_in_viewer.png\",\n    'globalized-msg': \"Viewer-UnhandledResponseCode\",\n    'default-msg': \"<title> Network problem </title>\" +\n    \"<message>Sorry. We seem to have some technical difficulties and couldn't complete your request.</message>\" +\n    \"<hint> Try loading the item again.</hint>\" +\n    \"<hint> Please verify your Internet connection, and refresh the browser to see if that fixes the problem.</hint>\" },\n\n\n  // BROWSER_WEBGL_NOT_SUPPORTED\n  8: { 'img': \"img-unsupported\", // \"icons/error_unsupported_file_type.png\",\n    'globalized-msg': \"Viewer-WebGlNotSupported\",\n    'default-msg': \"<title>Sorry</title><message>We can't show this item because this browser doesn't support WebGL.</message><hint>Try Google Chrome, Mozilla Firefox, or another browser that supports WebGL 3D graphics.</hint><hint>For more information, see the <a href=\\\"WEBGL_HELP\\\" target=\\\"_blank\\\">A360 browser reqirements.</a></hint>\" },\n\n\n  // BAD_DATA_NO_VIEWABLE_CONTENT\n  9: { 'img': \"img-item-not-found\", // \"icons/error_item_not_found.png\",\n    'globalized-msg': \"Viewer-NoViewable\",\n    'default-msg': \"<title> No viewable content </title>\" +\n    \"<message>There’s nothing to display for this item. It may not have been processed or it may not have content we can display.</message>\" +\n    \"<hint> Please contact the author.</hint>\" +\n    \"<hint> Please upload the file again to see if that fixes the issue.</hint>\" },\n\n\n  // BROWSER_WEBGL_DISABLED\n  10: { 'img': \"img-unsupported\", // \"icons/error_unsupported_file_type.png\",\n    'globalized-msg': \"Viewer-WebGlDisabled\",\n    'default-msg': \"<title>Sorry</title><message>We can't show this item because WebGL is disabled on this device.</message><hint> For more information see the <a href=\\\"WEBGL_HELP\\\" target=\\\"_blank\\\">A360 Help.</a></hint>\" },\n\n\n  // BAD_DATA_MODEL_IS_EMPTY\n  11: { 'img': \"img-item-not-found\", // \"icons/error_item_not_found.png\",\n    'globalized-msg': \"Viewer-ModeIsEmpty\",\n    'default-msg': \"<title>Model is empty</title>\" + \"<message>Model is empty, there is no geometry for the viewer to show.</message>\" +\n    \"<hint> Please contact the author.</hint>\" +\n    \"<hint> Please upload the file again to see if that fixes the issue.</hint>\" },\n\n\n  // RTC_ERROR\n  12: { 'img': \"img-unsupported\", // \"icons/error_unsupported_file_type.png\",\n    'globalized-msg': \"Viewer-RTCError\",\n    'default-msg': \"<title> Sorry </title>\" +\n    \"<message>We couldn’t connect to the Collaboration server.</message>\" +\n    \"<hint> Please verify your Internet connection, and refresh the browser to see if that fixes the problem.</hint>\" },\n\n\n  // UNSUPORTED_FILE_EXTENSION\n  13: { 'img': \"img-unsupported\", // \"icons/error_unsupported_file_type.png\",\n    'globalized-msg': \"Viewer-FileExtNotSupported\",\n    'default-msg': {\n      \"title\": \"Sorry\",\n      \"message\": \"The file extension loaded into the Viewer is not supported\",\n      \"hints\": [\n      \"Try a different file\"] } },\n\n\n\n\n  // VIEWER_INTERNAL_ERROR\n  // 14: Why is this missing???\n\n  // WEBGL_LOST_CONTEXT\n  15: { 'img': \"img-unsupported\", // \"icons/error_unsupported_file_type.png\",\n    'globalized-msg': \"Viewer-WebGlContextLost\",\n    'default-msg': {\n      \"title\": \"WebGL context lost\",\n      \"message\": \"Unable to recover from software mode.  Please restart your browser and reload the Viewer\",\n      \"hints\": [\n      \"If you continue to encounter this issue when viewing this model, we recommend switching to a different browser.\"] } } };\n\n\n\n\n\n\nexport function ErrorHandler()\n{\n}\n\nErrorHandler.prototype.constructor = ErrorHandler;\n\nErrorHandler.reportError = function (container, errorCode, errorMsg, statusCode, statusText, errorType)\n{\n  ErrorHandler.currentError = null;\n  ErrorHandler.currentErrors = null;\n\n  // If there is no errorCode, just return (otherwise an empty alert box is being shown)\n  if (!errorCode)\n  return;\n\n  var errorLog = {\n    category: \"error\",\n    code: errorCode,\n    message: errorMsg,\n    httpStatusCode: statusCode,\n    httpStatusText: statusText };\n\n  logger.track(errorLog, true);\n\n  ErrorHandler.currentError = [container, errorCode, errorMsg, errorType];\n\n  var errorInfo = ErrorInfoData[errorCode];\n  if (errorInfo)\n  {\n    var options = {\n      \"defaultValue\": \"\" };\n\n\n    options.defaultValue = errorInfo['default-msg'];\n    var imgClass = errorInfo[\"img\"];\n    var errorGlobalizedMsg = errorInfo['globalized-msg'];\n\n    var error = this.parseErrorString(errorGlobalizedMsg, options);\n\n    if (errorCode === Autodesk.Viewing.ErrorCodes.BROWSER_WEBGL_DISABLED ||\n    errorCode === Autodesk.Viewing.ErrorCodes.BROWSER_WEBGL_NOT_SUPPORTED)\n    {\n      var helpUrl = getWebGLHelpLink() || \"http://www.autodesk.com/a360-browsers\";\n\n      for (var i = 0; i < error.hints.length; i++) {\n        var index = error.hints[i].indexOf('href=\"WEBGL_HELP\"');\n        if (index !== -1) {\n          error.hints[i] = error.hints[i].replace('href=\"WEBGL_HELP\"', 'href=\"' + helpUrl + '\"');\n        }\n      }\n    }\n\n    AlertBox.displayError(container, error.msg, error.header, imgClass, error.hints);\n  } else\n\n  {\n    var imgClass = \"img-unsupported\"; // \"icons/error_unsupported_file_type.png\";\n\n    var options = {\n      \"defaultValue\": \"\",\n      \"interpolationPrefix\": \"{\",\n      \"interpolationSuffix\": \"}\" };\n\n\n    this.parseArguments(errorMsg, options);\n    var error = this.parseErrorString(errorCode, options);\n\n    if (!error.header)\n    error.header = errorType === \"warning\" ? i18n.translate(\"header-warning\") : \"\";\n    AlertBox.displayError(container, error.msg, error.header, imgClass, error.hints);\n  }\n};\n\nErrorHandler.reportErrors = function (container, errors)\n{\n  ErrorHandler.currentError = null;\n  ErrorHandler.currentErrors = null;\n\n  if (!errors)\n  return;\n\n  ErrorHandler.currentErrors = [container, errors];\n\n  var options = {\n    \"defaultValue\": \"\",\n    \"interpolationPrefix\": \"{\",\n    \"interpolationSuffix\": \"}\" };\n\n\n  var formattedErrors = [];\n  for (var i = 0; i < errors.length; i++) {\n    if (!errors[i].code)\n    continue;\n\n    this.parseArguments(errors[i].message, options);\n\n    var error = this.parseErrorString(errors[i].code, options);\n    if (!error.header)\n    error.header = errors[0].type === \"warning\" ? i18n.translate(\"header-warning\", { \"defaultValue\": \"Warning\" }) : \"\";\n\n    formattedErrors.push(error);\n\n    var errorLog = {\n      category: \"error\",\n      code: errors[i].code,\n      message: errors[i].message };\n\n    logger.track(errorLog, true);\n  }\n\n  if (!formattedErrors.length)\n  return;\n\n  // Default image.\n  var imgClass = \"img-unsupported\"; // \"icons/error_unsupported_file_type.png\";\n\n  AlertBox.displayErrors(container, imgClass, formattedErrors);\n};\n\nErrorHandler.parseArguments = function (errorMsg, options)\n{\n  if (!errorMsg)\n  return;\n\n  // Add arguments\n  if (typeof errorMsg === \"string\") {\n    options.defaultValue = errorMsg;\n  } else\n  {\n    // If there is an array, then there are arguments in the string.\n    // Add them to the options (arguments are named: 0, 1, 2, ...\n    options.defaultValue = errorMsg[0];\n    for (var i = 1; i < errorMsg.length; i++) {\n      var arg = i - 1;\n      var argName = arg.toString();\n      options[argName] = errorMsg[i];\n    }\n  }\n};\n\nErrorHandler.parseErrorString = function (errorCode, options)\n{\n  var error = {\n    \"msg\": null,\n    \"msgList\": null,\n    \"header\": null,\n    \"hints\": null };\n\n\n  if (!errorCode)\n  return error;\n\n  // Support for \"new\" format that doesn't embed HTML tags into the localization strings.\n  if (_typeof(options.defaultValue) === 'object') {\n    var obj = options.defaultValue;\n    error.header = obj.title;\n    error.msg = obj.message;\n    error.hints = obj.hints.concat();\n    return error;\n  }\n\n  // Translate the message.\n  var msg = i18n.translate(errorCode, options);\n  if (!msg)\n  return error;\n\n  // Split into header, message and hints. The messages may have the following format\n  //   <title>header</title>text of the error message. <hint> hint-1 <hint> hint-2 ... <hint> hint-n\n  //\n\n  // Get the header\n  if (msg.indexOf(\"<title>\") != -1) {\n    var parts = msg.split(\"<title>\")[1].split(\"</title>\");\n    error.header = parts[0];\n    msg = parts[1];\n  }\n\n  // Extract the message last.\n  if (msg && msg.indexOf(\"<message>\") != -1) {\n    var parts = msg.split(\"<message>\")[1].split(\"</message>\");\n    error.msg = parts[0];\n    msg = parts[1];\n  } else\n  {\n    error.msg = msg;\n  }\n\n  // Extract the hints next.\n  if (msg && msg.indexOf(\"<hint>\") != -1) {\n    // There are hints.\n    error.hints = [];\n    var hints = msg.split(\"<hint>\");\n    for (var h = 0; h < hints.length; h++) {\n      var hint = hints[h].split(\"</hint\")[0];\n      error.hints.push(hint);\n    }\n  }\n\n  return error;\n};\n\nErrorHandler.localize = function ()\n{\n  if (AlertBox.instances.length > 0) {\n    AlertBox.dismiss();\n\n    if (ErrorHandler.currentError) {\n      var container = ErrorHandler.currentError.shift();\n      var error = ErrorHandler.currentError;\n      ErrorHandler.reportError(container, error[0], error[1], error[2]);\n    } else {\n      var container = ErrorHandler.currentErrors.shift();\n      var errors = ErrorHandler.currentErrors[0];\n      ErrorHandler.reportErrors(container, errors);\n    }\n  }\n};","// extracted by mini-css-extract-plugin","\nimport { Viewer3D } from \"../application/Viewer3D\";\nimport { HotGestureTool } from \"../tools/HotGestureTool\";\nimport * as et from \"../application/EventTypes\";\nimport { isTouchDevice, isMobileDevice, touchStartToClick, getGlobal, isIOSDevice, isFullscreenEnabled } from \"../compat\";\nimport { ScreenMode } from \"../application/ScreenModeDelegate\";\nimport { i18n } from \"../globalization/i18next\";\nimport { Button } from \"./controls/Button\";\nimport { ControlGroup } from \"./controls/ControlGroup\";\nimport { ToolBar } from \"./toolbar/ToolBar\";\nimport { RadioButtonGroup } from \"./controls/RadioButtonGroup\";\nimport { ErrorHandler } from \"./ErrorHandler\";\nimport { ProgressBar } from \"./ProgressBar\";\nimport { logger } from \"../logger/Logger\";\nimport { getParameterByName, stringToDOM } from \"../globals\";\nimport { RenderOptionsPanel } from \"./RenderOptionsPanel\";\nimport { Lang } from \"../globalization/langs\";\nimport { setLanguage } from \"../globalization/i18init\";\nimport { HudMessage } from \"./HudMessage\";\nimport { AlertBox } from \"./AlertBox\";\nimport { SettingsPanel } from \"./SettingsPanel\";\nimport { ViewerSettingsPanel } from \"./ViewerSettingsPanel\";\nimport { ErrorCodes, errorCodeString } from \"../file-loaders/net/ErrorCodes\";\nimport { TOOLBAR, TOOLBAR_CREATED_EVENT, SETTINGS_PANEL_CREATED_EVENT, VIEW_CUBE_CREATED_EVENT } from \"./GuiViewerToolbarConst\";\nimport { KeyCode } from \"../tools/KeyCode\";\nimport { Prefs } from '../application/PreferenceNames';\n\n\n/**\n                                                         * Viewer component based on {@link Autodesk.Viewing.Viewer3D} with added UI.\n                                                         *\n                                                         * @constructor\n                                                         * @param {HTMLElement} container - The viewer container.\n                                                         * @param {object} config - The initial settings object. See base class for details.\n                                                         * @alias Autodesk.Viewing.GuiViewer3D\n                                                         * @extends Autodesk.Viewing.Viewer3D\n                                                         */\nexport function GuiViewer3D(container, config) {\n  if (!config) config = {};\n\n  // Explicitly set startOnInitialize = false, as we want to finish some initialization\n  // before starting the main loop.\n  //\n  config.startOnInitialize = false;\n\n  Viewer3D.call(this, container, config);\n\n  this.toolbar = null;\n\n  // Container for the UI docking panels\n  this.dockingPanels = [];\n\n  this.onFullScreenModeEvent = this.onFullScreenModeEvent.bind(this);\n  this.onProgressBarUpdate = this.onProgressBarUpdate.bind(this);\n\n}\n\nGuiViewer3D.prototype = Object.create(Viewer3D.prototype);\nGuiViewer3D.prototype.constructor = GuiViewer3D;\n\nGuiViewer3D.prototype.initialize = function (initOptions) {\n  var viewerErrorCode = Viewer3D.prototype.initialize.call(this, initOptions);\n\n  if (viewerErrorCode > 0) // ErrorCode was returned.\n    {\n      ErrorHandler.reportError(this.container, viewerErrorCode); // Show UI dialog\n      return viewerErrorCode;\n    }\n\n  var viewer = this;\n\n  // Add padding to bottom to account for toolbar, when calling fitToView()\n  // TODO: Use pixel size for setting these.\n  //---this.navigation.FIT_TO_VIEW_VERTICAL_OFFSET = 0.03;\n  //---this.navigation.FIT_TO_VIEW_VERTICAL_MARGIN = 0.0;\n\n  if (this.toolController) {\n    var hottouch = new HotGestureTool(this);\n\n    this.toolController.registerTool(hottouch);\n\n    this.toolController.activateTool(hottouch.getName());\n  }\n\n  this.addEventListener(et.FULLSCREEN_MODE_EVENT, this.onFullScreenModeEvent);\n\n  // Context menu\n  if (!this.contextMenu) {\n    this.setDefaultContextMenu();\n  }\n\n  // Create a progress bar. Shows streaming.\n  //\n  this.progressbar = new ProgressBar(this.container);\n  this.addEventListener(et.PROGRESS_UPDATE_EVENT, this.onProgressBarUpdate);\n\n  this.addEventListener(et.VIEWER_RESIZE_EVENT, function (event) {\n    viewer.resizePanels();\n    viewer.updateToolbarButtons(event.width, event.height);\n  });\n\n  this.addEventListener(et.NAVIGATION_MODE_CHANGED_EVENT, function (event) {\n    viewer.updateToolbarButtons(viewer.container.clientWidth, viewer.container.clientHeight);\n  });\n\n  this.initEscapeHandlers();\n\n  // Now that all the ui is created, localize it.\n  this.localize();\n\n\n  this.addEventListener(et.WEBGL_CONTEXT_LOST_EVENT, function (event) {\n    this.impl.stop();\n    // Hide all divs\n    var div = this.container;\n    var divCount = div.childElementCount;\n    for (var i = 0; i < divCount; ++i) {\n      div.children[i].style.display = 'none';\n    }\n    ErrorHandler.reportError(this.container, ErrorCodes.WEBGL_LOST_CONTEXT);\n  }.bind(this));\n\n  // Now that all of our initialization is done, start the main loop.\n  //\n  this.run();\n\n  return 0; // No errors initializing.\n};\n\nGuiViewer3D.prototype.uninitialize = function () {\n\n  if (this.viewerSettingsPanel) {\n    this.viewerSettingsPanel.uninitialize();\n    this.viewerSettingsPanel = null;\n  }\n\n  if (this.renderoptions) {\n    this.renderoptions.uninitialize();\n    this.renderoptions = null;\n  }\n\n  if (this.viewerOptionButton) {\n\n    this.viewerOptionButton = null;\n  }\n\n  this.removeEventListener(et.FULLSCREEN_MODE_EVENT, this.onFullScreenModeEvent);\n  this.removeEventListener(et.PROGRESS_UPDATE_EVENT, this.onProgressBarUpdate);\n\n  this.progressbar = null;\n\n  this.modelTools = null;\n  this.navTools = null;\n  this.settingsTools = null;\n  this.debugMenu = null;\n  this.modelStats = null;\n\n  // Toolbar\n  this.toolbar = null;\n\n  Viewer3D.prototype.uninitialize.call(this);\n};\n\nGuiViewer3D.prototype.setUp = function (config) {\n  if (!config) config = {};\n\n  // Explicitly set startOnInitialize = false, as we want to finish some initialization\n  // before starting the main loop.\n  //\n  config.startOnInitialize = false;\n\n  Viewer3D.prototype.setUp.call(this, config);\n};\n\nGuiViewer3D.prototype.tearDown = function () {\n\n  //TODO: this is unorthodox order of destruction, but we\n  //need to call the super first so it unloads the extensions,\n  //which need the GUI. We need to resolve this somehow.\n  Viewer3D.prototype.tearDown.call(this);\n\n\n  if (this.toolbar) {\n    this.toolbar.container.parentNode.removeChild(this.toolbar.container);\n    this.toolbar = null;\n  }\n\n  if (this.viewerSettingsPanel) {\n    this.setSettingsPanel(null);\n  }\n\n  if (this.renderoptions) {\n    this.removePanel(this.renderoptions);\n    this.renderoptions.uninitialize();\n    this.renderoptions = null;\n  }\n\n  this.debugMenu = null;\n\n  this.removeEventListener(et.GEOMETRY_LOADED_EVENT, this.checkGeometry);\n  this.checkGeometry = null;\n};\n\n/**\n    * Invokes extension's `onToolbarCreated` before `EXTENSION_LOADED_EVENT` gets fired.\n    * @private\n    */\nGuiViewer3D.prototype.onPostExtensionLoad = function (extension) {\n  var toolbar = this.getToolbar();\n  if (toolbar && extension.onToolbarCreated) {\n    extension.onToolbarCreated(toolbar);\n  }\n\n  this.updateToolbarButtons(this.container.clientWidth, this.container.clientHeight);\n};\n\nGuiViewer3D.prototype.loadModel = function (url, options, onSuccessCallback, onErrorCallback, initAfterWorker) {\n\n  var viewer = this;\n\n  function createUI(model) {\n    if (!viewer.running) {\n      logger.error(\"createUI expects the viewer to be running.\", errorCodeString(ErrorCodes.VIEWER_INTERNAL_ERROR));\n      return;\n    }\n    viewer.createUI(model);\n  }\n\n  function onSuccessChained(model) {\n\n    //TODO: The exact timeout needs to be tuned for best\n    //CPU utilization and shortest frame length during startup.\n    setTimeout(function () {\n      // Create UI when model is ready (except for headless and background loading)\n      var skipCreateUI = options && (options.loadAsHidden || options.headlessViewer);\n\n      if (!skipCreateUI) {\n        createUI(model);\n      }\n\n      if (onSuccessCallback)\n      onSuccessCallback.call(onSuccessCallback, model);\n    }, 1);\n  }\n\n  function onFailureChained(errorCode) {\n    if (errorCode !== ErrorCodes.LOAD_CANCELED) {\n      ErrorHandler.reportError(viewer.container, errorCode); // Show UI dialog\n    }\n    onErrorCallback && onErrorCallback.apply(onErrorCallback, arguments);\n  }\n\n  var res = Viewer3D.prototype.loadModel.call(this, url, options, onSuccessChained, onFailureChained, initAfterWorker);\n\n  return res;\n};\n\nGuiViewer3D.prototype.createUI = function (model, force) {var _this = this;\n  // We only support UI for initially loaded model.\n  if (this.model !== model && !force) {\n    return;\n  }\n\n  var viewer = this;\n  var newToolbarCreated = this._createToolbar();\n\n  this.checkGeometry = function (event) {\n    // When force==false, the function is called once, for the first loaded model\n    // When force==true, the function is called once for every model, in the order they are loaded\n\n    //Delay this to the next frame so that the current frame can render fast and display the geometry.\n    setTimeout(function () {\n\n      // The view may have been reconfigured to 2d meanwhile.\n      if (viewer.impl.is2d) {\n        return;\n      }\n\n      // Piggybacking on handler to handle empty models (rare case)\n      //\n      // Note that in an aggregated view, viewer.model may be temporarily null, e.g.,\n      //  a) if the view was just switched and the models for the new view are not loaded yet\n      //  b) if visibility was toggled off for all models by the user\n      // In this case, we don't want to report an error.\n      if (event.model && !event.model.hasGeometry()) {\n        var errorCode = ErrorCodes.BAD_DATA_MODEL_IS_EMPTY;\n        var errorMsg = \"Model is empty\";\n        ErrorHandler.reportError(viewer.container, errorCode, errorMsg);\n        viewer._loadingSpinner.hide();\n      }\n    }, 1);\n  };\n\n  var disabledExtensions = this.config.disabledExtensions || {};\n  var canEnableExt = function canEnableExt(id) {\n    var extsDisabledByProfile = _this.profile && _this.profile.extensions.unload ? _this.profile.extensions.unload : [];\n    return extsDisabledByProfile.indexOf(id) === -1;\n  };\n\n  this.initModelTools(model);\n\n  //Optional rendering options panel + button\n  if (getGlobal().ENABLE_DEBUG) {\n    this.initDebugTools();\n  }\n\n  //load debug ext by query param\n  //duped from Viewer3D as a workaround for adsk viewer site\n  var debugConfig = getParameterByName(\"lmv_viewer_debug\");\n  if (debugConfig === \"true\") {\n    this.loadExtension(\"Autodesk.Debug\", this.config);\n  }\n\n  // Unload extension if it is loaded.\n  var makeSureUnloaded = function makeSureUnloaded(extId) {\n    var ext = viewer.getExtension(extId);\n    if (ext) {\n      viewer.unloadExtension(extId);\n    }\n  };\n\n  // When switching from 3D to 2d, unload all automatically loaded 3D-only extensions before triggering onToolbarCreated()\n  if (model.is2d()) {\n    makeSureUnloaded('Autodesk.BimWalk');\n    makeSureUnloaded('Autodesk.Section');\n    makeSureUnloaded('Autodesk.Viewing.FusionOrbit');\n    makeSureUnloaded('Autodesk.Explode');\n  }\n\n  // If measure extension will be automatically loaded, unload any previous one first.\n  // This makes sure that the measure extension UI is properly configured for 2D/3D.\n  if (!disabledExtensions.measure) {\n    makeSureUnloaded('Autodesk.Measure');\n  }\n\n  if (newToolbarCreated) {\n    // Dispatch a toolbar created event\n    this.dispatchEvent({ type: TOOLBAR_CREATED_EVENT });\n    // Notify extensions\n    this.forEachExtension(function (ext) {\n      ext.onToolbarCreated && ext.onToolbarCreated(_this.toolbar);\n    });\n  }\n\n  // Load or update navtools extension\n  var navExtName = 'Autodesk.DefaultTools.NavTools';\n  var navExt = this.getExtension(navExtName);\n  if (navExt) {\n    // If already loaded, just make sure that it is properly configured\n    navExt.updateUI(model.is3d());\n  } else {\n    this.loadExtension(navExtName, viewer.config);\n  }\n\n  this.resize();\n\n  if (model.is2d()) {\n\n    // Make pan a default navigation tool.\n    this.setDefaultNavigationTool(\"pan\");\n\n    // Make sure view cube and click to set COI are disabled (but don't update the preferences)\n    this.setClickToSetCOI(false, false);\n\n    //Load relevant extensions (on the next frame, since creating the UI is already too slow)\n    setTimeout(function () {\n      var ext2d = {\n        viewcube: 'Autodesk.ViewCubeUi',\n        measure: 'Autodesk.Measure',\n        hyperlink: 'Autodesk.Hyperlink',\n        layerManager: 'Autodesk.LayerManager',\n        propertiesPanel: 'Autodesk.PropertiesManager' };\n\n\n      for (var key in ext2d) {\n        var extId = ext2d[key];\n        if (!disabledExtensions[key] && canEnableExt(extId)) {\n          viewer.loadExtension(extId, viewer.config);\n        }\n      }\n    }, 1);\n\n  } else {\n    // Make orbit a default navigation tool.\n    if (this.getDefaultNavigationToolName().indexOf(\"orbit\") === -1)\n    this.setDefaultNavigationTool(\"orbit\");\n\n    //Load relevant extensions (on the next frame, since creating the UI is already too slow)\n    setTimeout(function () {\n\n      var ext3d = {\n        viewcube: 'Autodesk.ViewCubeUi',\n        explode: 'Autodesk.Explode',\n        bimwalk: 'Autodesk.BimWalk',\n        fusionOrbit: 'Autodesk.Viewing.FusionOrbit',\n        measure: 'Autodesk.Measure',\n        section: 'Autodesk.Section',\n        layerManager: 'Autodesk.LayerManager',\n        modelBrowser: 'Autodesk.ModelStructure',\n        propertiesPanel: 'Autodesk.PropertiesManager' };\n\n\n      for (var key in ext3d) {\n        var extId = ext3d[key];\n        if (!disabledExtensions[key] && canEnableExt(extId)) {\n          viewer.loadExtension(extId, viewer.config);\n        }\n      }\n\n      // if (!disabledExtensions.hyperlink) {\n      //     viewer.loadExtension('Autodesk.Hyperlink', viewer.config);\n      // }\n\n      if (!disabledExtensions.scalarisSimulation && canEnableExt('Autodesk.Viewing.ScalarisSimulation')) {\n        // Note that viewer.model might be null if it was removed between createUI and timeout trigger.\n        if (viewer.model && viewer.model.isScalaris) {\n          viewer.loadExtension('Autodesk.Viewing.ScalarisSimulation', viewer.config);\n        }\n      }\n    }, 1);\n\n    if (model.isLoadDone()) {\n      this.checkGeometry({ model: model });\n    } else {\n      this.addEventListener(et.GEOMETRY_LOADED_EVENT, this.checkGeometry, { once: true });\n    }\n  }\n};\n\nGuiViewer3D.prototype.onFullScreenModeEvent = function (event) {\n  this.resizePanels();\n  this.updateFullscreenButton(event.mode);\n};\n\nGuiViewer3D.prototype.onProgressBarUpdate = function (event) {\n  if (event.percent >= 0) {\n    this.progressbar.setPercent(event.percent);\n  }\n};\n\n\n// \"tooltip\" string is localized by this method.\nGuiViewer3D.prototype.addOptionToggle = function (parent, tooltip, initialState, onchange, saveKey) {\n\n  // Use the stored settings or defaults\n  var storedState = saveKey ? this.prefs[saveKey] : null;\n  initialState = typeof storedState === 'boolean' ? storedState : initialState;\n\n  var _document = this.getDocument();\n  var li = _document.createElement(\"li\");\n  li.className = \"toolbar-submenu-listitem\";\n\n  var cb = _document.createElement(\"input\");\n  cb.className = \"toolbar-submenu-checkbox\";\n  cb.type = \"checkbox\";\n  cb.id = tooltip;\n  li.appendChild(cb);\n\n  var lbl = _document.createElement(\"label\");\n  lbl.setAttribute('for', tooltip);\n  lbl.setAttribute(\"data-i18n\", tooltip);\n  lbl.textContent = i18n.translate(tooltip);\n  li.appendChild(lbl);\n\n  parent.appendChild(li);\n\n  cb.checked = initialState;\n\n  cb.addEventListener(\"touchstart\", touchStartToClick);\n  lbl.addEventListener(\"touchstart\", touchStartToClick);\n  li.addEventListener(\"touchstart\", touchStartToClick);\n\n  cb.addEventListener(\"click\", function (e) {\n    onchange(cb.checked);\n    e.stopPropagation();\n  });\n\n  lbl.addEventListener(\"click\", function (e) {\n    e.stopPropagation();\n  });\n\n  li.addEventListener(\"click\", function (e) {\n    onchange(!cb.checked);\n    e.stopPropagation();\n  });\n\n  if (saveKey) {\n    this.prefs.addListeners(saveKey, function (value) {\n      cb.checked = value;\n    }, function (value) {\n      cb.checked = value;\n      onchange(value);\n    });\n  }\n  return cb;\n};\n\n// \"label\" string will be converted to localized string by this method\nGuiViewer3D.prototype.addOptionList = function (parent, label, optionList, initialIndex, onchange, saveKey) {\n\n  // Use the stored settings or defaults\n  var storedState = this.prefs[saveKey];\n  initialIndex = typeof storedState === 'number' ? storedState : initialIndex;\n\n  // Wrap the onchange with the update to that setting\n  var handler = function handler(e) {\n    var selectedIndex = e.target.selectedIndex;\n    onchange(selectedIndex);\n    e.stopPropagation();\n  };\n\n  var _document = this.getDocument();\n  var selectElem = _document.createElement(\"select\");\n  selectElem.className = 'option-drop-down';\n  selectElem.id = \"selectMenu_\" + label;\n  for (var i = 0; i < optionList.length; i++) {\n    var item = _document.createElement(\"option\");\n    item.value = i;\n    item.setAttribute(\"data-i18n\", optionList[i]);\n    item.textContent = i18n.translate(optionList[i]);\n    selectElem.add(item);\n  }\n\n  var li = _document.createElement(\"li\");\n  li.className = \"toolbar-submenu-select\";\n\n  var lbl = _document.createElement(\"div\");\n  lbl.className = \"toolbar-submenu-selectlabel\";\n  lbl.setAttribute('for', label);\n  lbl.setAttribute(\"data-i18n\", label);\n  lbl.textContent = i18n.translate(label);\n  li.appendChild(lbl);\n  li.appendChild(selectElem);\n\n  parent.appendChild(li);\n\n  selectElem.selectedIndex = initialIndex;\n  selectElem.onchange = handler;\n  selectElem.addEventListener(\"touchstart\", function (e) {\n    e.stopPropagation();\n  });\n  selectElem.addEventListener(\"click\", function (e) {\n    e.stopPropagation();\n  });\n\n  if (saveKey) {\n    this.prefs.addListeners(saveKey, function (value) {\n      selectElem.selectedIndex = value;\n    }, function (value) {\n      selectElem.selectedIndex = value;\n      onchange(value);\n    });\n  }\n\n  return selectElem;\n};\n\nGuiViewer3D.prototype.showViewer3dOptions = function (show) {\n  var settingsPanel = this.getSettingsPanel(true);\n  if (show && settingsPanel.isVisible()) {\n    settingsPanel.setVisible(false);\n  }\n  settingsPanel.setVisible(show);\n};\n\nGuiViewer3D.prototype.showRenderingOptions = function (show) {\n  if (show) {\n    this._createRenderingOptionsPanel();\n  }\n  this.renderoptions && this.renderoptions.setVisible(show);\n};\n\n/**\n    * @private\n    */\nGuiViewer3D.prototype._createRenderingOptionsPanel = function () {var _this2 = this;\n\n  if (this.renderoptions || this.model.is2d())\n  return;\n\n  // panel\n  this.renderoptions = new RenderOptionsPanel(this);\n  this.addPanel(this.renderoptions);\n\n  // toolbar button\n  if (this.settingsTools && !this.renderOptionsButton) {\n    var renderOptionsButton = new Button('toolbar-renderOptionsTool');\n    renderOptionsButton.setToolTip('Rendering options');\n    renderOptionsButton.setIcon(\"adsk-icon-settings-render\");\n    renderOptionsButton.onClick = function (e) {\n      var isVisible = _this2.renderoptions && _this2.renderoptions.isVisible();\n      _this2.renderoptions.setVisible(!isVisible);\n    };\n    this.settingsTools.addControl(renderOptionsButton);\n  }\n};\n\nGuiViewer3D.prototype.showLayerManager = function (show) {\n  logger.warn('viewer.showLayerManager() is now handled the extension \"Autodesk.LayerManager\" and will be removed in version 8.0.0.');\n};\n\n/**\n    * TODO: Remove on version 8.0.0\n    * @deprecated\n    * @private\n    */\nGuiViewer3D.prototype.initHotkeys = function () {\n  // TODO: remove function on version 8.0.0\n  logger.warn('viewer.initHotkeys() has been deprecated and will be removed in version 8.0.0.');\n};\n\n\n\n/**\n    * Deprecated: Use {@link Autodesk.Viewing.Extensions.ModelStructureExtension} api. Will be removed in (v8.0.0).\n    *\n    * Sets the model structure panel for displaying the loaded model.\n    *\n    * @param {Autodesk.Viewing.UI.ModelStructurePanel} modelStructurePanel - The model structure panel to use, or null.\n    * @returns {boolean} True if the panel, or null, was set successfully; false otherwise.\n    *\n    * @deprecated\n    */\nGuiViewer3D.prototype.setModelStructurePanel = function (modelStructurePanel) {\n  logger.warn('viewer.setModelStructurePanel() is deprecated and will be removed in v8.0.0 - Use extension \"Autodesk.ModelStructure\".');\n\n  var ext = this.getExtension('Autodesk.ModelStructure');\n  if (!ext)\n  return false;\n\n  return ext.setModelStructurePanel(modelStructurePanel);\n};\n\n/**\n    * Sets the layers panel for display 2d layers.\n    *\n    * @param {Autodesk.Viewing.UI.LayersPanel} layersPanel - The layers panel to use, or null.\n    * @returns {boolean} True if the panel or null was set successfully, and false otherwise.\n    */\nGuiViewer3D.prototype.setLayersPanel = function (layersPanel) {\n  logger.warn('viewer.setLayersPanel() is now handled the extension \"Autodesk.LayerManager\" and will be removed in version 8.0.0.');\n};\n\n/**\n    * @private\n    * @deprecated\n    */\nGuiViewer3D.prototype.setPropertyPanel = function (propertyPanel) {\n  logger.warn('viewer.setPropertyPanel() is now handled by extension \"Autodesk.PropertiesManager\" and will be removed in version 8.0.0.');\n  var ext = this.getExtension('Autodesk.PropertiesManager');\n  if (!ext)\n  return false;\n  return ext.setPanel(propertyPanel);\n};\n\n/**\n    * @deprecated\n    * @private\n    */\nGuiViewer3D.prototype.getPropertyPanel = function (createDefault) {\n  logger.warn('viewer.getPropertyPanel() is now handled the extension \"Autodesk.PropertiesManager\" and will be removed in version 8.0.0.');\n  var ext = this.getExtension('Autodesk.PropertiesManager');\n  if (!ext && createDefault) {\n    this.loadExtension('Autodesk.PropertiesManager'); // Loads syncronously\n    ext = this.getExtension('Autodesk.PropertiesManager');\n  }\n  return ext ? ext.getPanel() : null;\n};\n\n\n/**\n    * Sets the viewer's settings panel.\n    * @param {Autodesk.Viewing.UI.SettingsPanel} settingsPanel - The settings panel to use, or null.\n    * @returns {boolean} True if the panel or null was set successfully, and false otherwise.\n    */\nGuiViewer3D.prototype.setSettingsPanel = function (settingsPanel) {\n  var self = this;\n  if (settingsPanel instanceof SettingsPanel || !settingsPanel) {\n    if (this.viewerSettingsPanel) {\n      this.viewerSettingsPanel.setVisible(false);\n      this.removePanel(this.viewerSettingsPanel);\n      this.viewerSettingsPanel.uninitialize();\n    }\n\n    this.viewerSettingsPanel = settingsPanel;\n    if (settingsPanel) {\n      this.addPanel(settingsPanel);\n\n      settingsPanel.addVisibilityListener(function (visible) {\n        if (visible) {\n          self.onPanelVisible(settingsPanel, self);\n        }\n        self.viewerOptionButton.setState(visible ? Button.State.ACTIVE : Button.State.INACTIVE);\n      });\n    }\n    return true;\n  }\n  return false;\n};\n\nGuiViewer3D.prototype.getSettingsPanel = function (createDefault, model) {\n  if (!this.viewerSettingsPanel && createDefault) {\n    this.createSettingsPanel(model || this.model);\n  }\n  return this.viewerSettingsPanel;\n};\n\nGuiViewer3D.prototype.createSettingsPanel = function (model) {\n  var settingsPanel = new ViewerSettingsPanel(this, model);\n  this.setSettingsPanel(settingsPanel);\n  settingsPanel.syncUI();\n\n  var viewerOptionButton = new Button('toolbar-settingsTool');\n  this.viewerOptionButton = viewerOptionButton;\n  viewerOptionButton.setIcon(\"adsk-icon-settings\");\n  viewerOptionButton.setToolTip(\"Settings\");\n  this.settingsTools.addControl(viewerOptionButton);\n  this.createViewerOptionsMenu(model);\n\n  this.dispatchEvent({ type: SETTINGS_PANEL_CREATED_EVENT });\n};\n\nGuiViewer3D.prototype.initModelTools = function (model) {\n  var viewer = this;\n\n  // New viewer options' panel\n  this.createSettingsPanel(model);\n\n  if (getGlobal().ENABLE_DEBUG) {\n    this._createRenderingOptionsPanel();\n  }\n\n  // LMV-5562 do not show the full screen button if document.fullscreenEnabled is set to false.\n  if (this.canChangeScreenMode() && !this.settingsTools.fullscreenbutton && isFullscreenEnabled(this.getDocument())) {\n    var fullscreenButton = new Button('toolbar-fullscreenTool', { collapsible: false });\n    fullscreenButton.setToolTip('Full screen');\n    fullscreenButton.setIcon(\"adsk-icon-fullscreen\");\n    fullscreenButton.onClick = function (e) {\n      viewer.nextScreenMode();\n    };\n    this.settingsTools.addControl(fullscreenButton);\n    this.settingsTools.fullscreenbutton = fullscreenButton;\n\n    this.updateFullscreenButton(this.getScreenMode());\n  }\n};\n\n/**\n    * @private\n    * @deprecated\n    */\nGuiViewer3D.prototype.setPropertiesOnSelect = function (onSelect) {\n  logger.warn('viewer.setPropertiesOnSelect() is now handled by viewer.prefs.set(\"openPropertiesOnSelect\", <boolean>) and will be removed in version 8.0.0.');\n  this.prefs.set(Prefs.OPEN_PROPERTIES_ON_SELECT, onSelect);\n};\n\nGuiViewer3D.prototype.addDivider = function (parent) {\n  var _document = this.getDocument();\n  var item = _document.createElement(\"li\");\n  item.className = \"toolbar-submenu-horizontal-divider\";\n  parent.appendChild(item);\n  return item;\n};\n\nGuiViewer3D.prototype.createViewerOptionsMenu = function (model) {\n  // TODO: Refactor this into a control\n  var viewer = this;\n  function show3dOptions() {\n\n    var panel = viewer.getSettingsPanel(true);\n    if (!panel.isVisible()) {\n      viewer.showViewer3dOptions(true);\n    } else {\n      viewer.showViewer3dOptions(false);\n    }\n  }\n\n  this.viewerOptionButton.onClick = function () {\n    show3dOptions();\n  };\n\n\n};\nGuiViewer3D.prototype.initDebugTools = function () {\n\n  if (this.debugMenu)\n  return false;\n\n  var debugGroup = new ControlGroup('debugTools');\n  this.debugMenu = debugGroup;\n\n  // Create the debug submenu button and attach submenu to it.\n  var debugButton = new Button('toolbar-debugTool');\n  debugButton.setIcon(\"adsk-icon-bug\");\n  debugGroup.addControl(debugButton);\n  this.debugMenu.debugSubMenuButton = debugButton;\n\n  this.createDebugSubmenu(this.debugMenu.debugSubMenuButton);\n\n  this.toolbar.addControl(debugGroup);\n  return true;\n};\n\nGuiViewer3D.prototype.removeDebugTools = function () {\n  if (!this.debugMenu)\n  return;\n\n  this.debugMenu.removeFromParent();\n  this.debugMenu = null;\n};\n\nGuiViewer3D.prototype.createDebugSubmenu = function (button) {\n  // TODO: Refactor into a control\n  var viewer = this;\n\n  var _document = this.getDocument();\n  var subMenu = _document.createElement('div');\n  subMenu.id = 'toolbar-debugToolSubmenu';\n  subMenu.classList.add('toolbar-submenu');\n  subMenu.classList.add('toolbar-settings-sub-menu');\n  subMenu.classList.add('adsk-hidden');\n\n  this.debugMenu.subMenu = subMenu;\n  this.debugMenu.subMenu.style.minWidth = \"180px\";\n\n  // Temp connect to the main container to calculate the correct width\n  this.container.appendChild(subMenu);\n\n  this.initModelStats();\n  this.addDivider(subMenu);\n\n  // Add the language setting\n  this.addDivider(subMenu);\n  var langs = Lang.getLanguages();\n  var langNames = langs.map(function (elem) {return elem.label;});\n  var langSymbols = langs.map(function (elem) {return elem.symbol;});\n\n  function setLanguageCB() {\n    viewer.localize();\n  }\n\n  var initialSelection = viewer.selectedLanguage ? viewer.selectedLanguage : 0;\n  var langList = this.addOptionList(subMenu, \"Language\", langNames, initialSelection, function (selectedIndex) {\n    var langSymb = langSymbols[selectedIndex];\n    viewer.selectedLanguage = selectedIndex;\n    setLanguage(langSymb, setLanguageCB);\n  }, null);\n  langList.parentNode.style.paddingBottom = \"15px\";\n\n  // Add display of errors\n  this.addDivider(this.debugMenu.subMenu);\n  var errorNames = [\"UNKNOWN FAILURE\", \"BAD DATA\", \"NETWORK ERROR\", \"NETWORK ACCESS DENIED\",\n  \"NETWORK FILE NOT FOUND\", \"NETWORK SERVER ERROR\", \"NETWORK UNHANDLED RESPONSE CODE\",\n  \"BROWSER WEBGL NOT SUPPORTED\", \"BAD DATA NO VIEWABLE CONTENT\"];\n\n  var errorList = this.addOptionList(subMenu, \"Error\", errorNames, 0, function (errorIndex) {\n    var errorCode = errorIndex + 1;\n    ErrorHandler.reportError(viewer.container, errorCode, \"\");\n  }, null);\n  errorList.parentNode.style.paddingBottom = \"15px\";\n\n  var subMenuBounds = subMenu.getBoundingClientRect();\n  this.debugMenu.subMenu.style.width = subMenuBounds.width + \"px\";\n  this.container.removeChild(subMenu);\n  button.container.appendChild(subMenu);\n\n  // Check if the menu fits on the right site and if not, adjust the right edge.\n  var right = subMenuBounds.left + subMenuBounds.width;\n  var rightBoundary = this.container.getBoundingClientRect().right;\n  if (right > rightBoundary) {\n    var leftAdjustment = -(right - rightBoundary + 10) + \"px\";\n    this.debugMenu.subMenu.style.left = leftAdjustment;\n  }\n\n  button.onMouseOver = function (e) {\n    subMenu.classList.remove('adsk-hidden');\n  };\n\n  button.onMouseOut = function (e) {\n    subMenu.classList.add('adsk-hidden');\n  };\n\n  if (isTouchDevice()) {\n    button.onClick = function (e) {\n      subMenu.classList.toggle('adsk-hidden');\n    };\n  }\n};\n\nGuiViewer3D.prototype.initModelStats = function () {\n\n  var self = this;\n\n  function updateModelStatContent(message) {\n    var viewer = self.impl;\n    var text = \"\";\n    var model = self.model;\n    if (model) {\n      text += \"Geom&nbsp;polys:&nbsp;\" + viewer.modelQueue().getGeometryList().geomPolyCount + \"<br>\";\n      text += \"Instance&nbsp;polys:&nbsp;\" + viewer.modelQueue().getGeometryList().instancePolyCount + \"<br>\";\n      text += \"Fragments:&nbsp;\" + viewer.modelQueue().getFragmentList().getCount() + \"<br>\";\n      text += \"Geoms:&nbsp;\" + viewer.modelQueue().getGeometryList().geoms.length + \"<br>\";\n      text += \"Loading&nbsp;time:&nbsp;\" + (viewer.model.loader.loadTime / 1000).toFixed(2) + \" s\" + \"<br>\";\n    }\n    text += \"# \" + (message || \"\");\n\n    self.modelStats.innerHTML = text;\n  }\n\n  // On progress update debug text.\n  //\n  function createModelStats() {\n    var _document = self.getDocument();\n    self.modelStats = _document.createElement(\"div\");\n    self.modelStats.className = \"statspanel\";\n    self.container.appendChild(self.modelStats);\n\n    self.addEventListener(et.PROGRESS_UPDATE_EVENT, function (e) {\n      if (e.message) {\n        updateModelStatContent(e.message);\n      }\n    });\n\n\n    self.fpsDisplay = _document.createElement(\"div\");\n    self.fpsDisplay.className = \"fps\";\n    self.container.appendChild(self.fpsDisplay);\n  }\n\n  this.addOptionToggle(this.debugMenu.subMenu, \"Model statistics\", false, function (checked) {\n\n    if (checked && !self.modelStats) {\n      createModelStats();\n      updateModelStatContent(\"\");\n    }\n\n    self.modelStats.style.visibility = checked ? \"visible\" : \"hidden\";\n    self.fpsDisplay.style.visibility = checked ? \"visible\" : \"hidden\";\n\n    if (checked) {\n      self.impl.fpsCallback = function (fps) {\n        self.fpsDisplay.textContent = \"\" + (0 | fps);\n      };\n    } else {\n      self.impl.fpsCallback = null;\n    }\n  });\n\n};\n\nGuiViewer3D.prototype.initEscapeHandlers = function () {\n  var viewer = this;\n\n  this.addEventListener(et.ESCAPE_EVENT, function (event) {\n    if (viewer.contextMenu && viewer.contextMenu.hide()) {\n      return;\n    }\n\n    // Render options isn't enabled in release, so don't try to manipulate it\n    if (viewer.renderoptions) {\n      // Close render settings panel\n      if (viewer.renderoptions.isVisible()) {\n        viewer.renderoptions.setVisible(false);\n        return;\n      }\n    }\n\n    // TODO: stop any active animation\n\n    // Deselect\n    if (viewer.impl.selector.hasSelection()) {\n      viewer.clearSelection();\n      return;\n    }\n\n    // Reset default navigation mode:\n    if (viewer.getActiveNavigationTool() !== viewer.getDefaultNavigationToolName()) {\n      // Force unlock active tool:\n      if (viewer.toolController)\n      viewer.toolController.setIsLocked(false);\n\n      viewer.setActiveNavigationTool();\n      HudMessage.dismiss();\n      return;\n    }\n\n    // Show all if anything is hidden\n    if (!viewer.areAllVisible()) {\n      viewer.showAll();\n      return;\n    }\n\n    // Close open alert windows\n    if (AlertBox.dismiss()) {\n      return;\n    }\n\n    // Close open windows\n    for (var i = 0; i < viewer.dockingPanels.length; ++i) {\n      var panel = viewer.dockingPanels[i];\n      if (panel.container.style.display !== \"none\" && panel.container.style.display !== \"\") {\n        panel.setVisible(false);\n        return;\n      }\n    }\n\n    if (viewer.escapeScreenMode()) {\n      return;\n    }\n  });\n};\n\n/**\n    * Returns a toolbar.\n    * @param {boolean} create - If true and the toolbar does not exist, it will be created.\n    * @returns {Autodesk.Viewing.UI.ToolBar} Returns the toolbar.\n    */\nGuiViewer3D.prototype.getToolbar = function () {\n  return this.toolbar;\n};\n\nGuiViewer3D.prototype._createToolbar = function () {\n\n  if (this.toolbar)\n  return false;\n\n  this.toolbar = new ToolBar('guiviewer3d-toolbar');\n  this.toolbar.setGlobalManager(this.globalManager);\n\n  if (this._forgeLogo) {\n    var bb = this._forgeLogo.getBoundingClientRect();\n    // Place the toolbar above the forge logo div. \n    this.toolbar.container.style.bottom = \"\".concat(bb.height + 10, \"px\");\n  }\n  this.navTools = new RadioButtonGroup(TOOLBAR.NAVTOOLSID);\n  this.modelTools = new ControlGroup(TOOLBAR.MODELTOOLSID);\n  this.settingsTools = new ControlGroup(TOOLBAR.SETTINGSTOOLSID);\n\n  this.toolbar.addControl(this.navTools);\n  this.toolbar.addControl(this.modelTools);\n  this.toolbar.addControl(this.settingsTools);\n\n  this.container.appendChild(this.toolbar.container);\n\n  this.updateToolbarButtons(this.container.clientWidth, this.container.clientHeight);\n\n  return true;\n};\n\n/**\n    * Deprecated: Use {@link Autodesk.Viewing.Extensions.ModelStructureExtension} api. Will be removed in (v8.0.0).\n    *\n    * Sets whether the model browser panel is visible (true) or not (false).\n    *\n    * @param {boolean} show - true to get the panel visible, false otherwise.\n    *\n    * @deprecated\n    */\nGuiViewer3D.prototype.showModelStructurePanel = function (show) {\n  logger.warn('viewer.showModelStructurePanel() is deprecated and will be removed in v8.0.0 - Use extension \"Autodesk.ModelStructure\".');\n  if (show) {\n    this.activateExtension('Autodesk.ModelStructure');\n  } else {\n    this.deactivateExtension('Autodesk.ModelStructure');\n  }\n};\n\nGuiViewer3D.prototype.onPanelVisible = function (panel) {\n\n  // Shift this window to the top of the list, so that it will be closed first\n  //\n  this.dockingPanels.splice(this.dockingPanels.indexOf(panel), 1);\n  this.dockingPanels.splice(0, 0, panel);\n};\n\nGuiViewer3D.prototype.updateFullscreenButton = function (mode) {\n  var cls = \"adsk-icon-fullscreen\";\n\n  switch (mode) {\n    case ScreenMode.kNormal:\n      if (!this.isScreenModeSupported(ScreenMode.kFullBrowser)) {\n        cls = 'adsk-icon-fullscreen';\n      }\n      break;\n    case ScreenMode.kFullBrowser:\n      if (this.isScreenModeSupported(ScreenMode.kFullScreen)) {\n        cls = 'adsk-icon-fullscreen';\n      } else {\n        cls = 'adsk-icon-fullscreen-exit';\n      }\n      break;\n    case ScreenMode.kFullScreen:\n      cls = 'adsk-icon-fullscreen-exit';\n      break;}\n\n\n  this.settingsTools.fullscreenbutton.setIcon(cls);\n};\n\nGuiViewer3D.prototype.localize = function () {\n\n  Viewer3D.prototype.localize.call(this);\n\n  if (this.debugMenu && this.debugMenu.debugSubMenuButton) {\n    this.debugMenu.debugSubMenuButton.container.removeChild(this.debugMenu.subMenu);\n    this.createDebugSubmenu(this.debugMenu.debugSubMenuButton);\n  }\n\n  ErrorHandler.localize();\n};\n\n\n/**\n    * Adds a panel to the viewer. The panel will be moved and resized if the viewer\n    * is resized and the panel falls outside of the bounds of the viewer.\n    *\n    * @param {Autodesk.Viewing.UI.PropertyPanel} panel - The panel to add.\n    * @returns {boolean} True if panel was successfully added.\n    *\n    */\nGuiViewer3D.prototype.addPanel = function (panel) {\n  var index = this.dockingPanels.indexOf(panel);\n  if (index === -1) {\n    this.dockingPanels.push(panel);\n    return true;\n  }\n  return false;\n};\n\n/**\n    * Removes a panel from the viewer. The panel will no longer be moved and\n    * resized if the viewer is resized.\n    *\n    * @param {Autodesk.Viewing.UI.PropertyPanel} panel - The panel to remove.\n    * @returns {boolean} True if panel was successfully removed.\n    */\nGuiViewer3D.prototype.removePanel = function (panel) {\n  var index = this.dockingPanels.indexOf(panel);\n  if (index > -1) {\n    this.dockingPanels.splice(index, 1);\n    return true;\n  }\n  return false;\n};\n\n/**\n    * Resizes the panels currently held by the viewer.\n    * @param {object} [options] - An optional dictionary of options.\n    * @param {array} [options.dockingPanels=all] - A list of panels to resize.\n    * @param {object} [options.dimensions] - The area for the panels to occupy.\n    * @param {number} options.dimensions.width - Width.\n    * @param {number} options.dimensions.height - Height.\n    */\nGuiViewer3D.prototype.resizePanels = function (options) {\n\n  options = options || {};\n\n  var toolbarHeight = this.toolbar ? this.toolbar.getDimensions().height : 0;\n  var dimensions = this.getDimensions();\n  var maxHeight = dimensions.height;\n\n  if (options.dimensions && options.dimensions.height) {\n    maxHeight = options.dimensions.height;\n  } else\n  {\n    options.dimensions = {\n      height: dimensions.height,\n      width: dimensions.width };\n\n  }\n\n  options.dimensions.height = maxHeight - toolbarHeight;\n\n  var viewer = this;\n\n  var dockingPanels = options ? options.dockingPanels : null;\n  if (!dockingPanels) {\n    dockingPanels = viewer.dockingPanels;\n  }\n\n  var viewerRect = viewer.container.getBoundingClientRect(),\n  vt = viewerRect.top,\n  vb = viewerRect.bottom,\n  vl = viewerRect.left,\n  vr = viewerRect.right,\n  vw,vh;\n\n  if (options && options.dimensions) {\n    vw = options.dimensions.width;\n    vh = options.dimensions.height;\n    vb = vt + vh;\n  } else {\n    vw = viewerRect.width;\n    vh = viewerRect.height;\n  }\n\n  for (var i = 0; i < dockingPanels.length; ++i) {\n    dockingPanels[i].onViewerResize(vt, vb, vl, vr, vw, vh);\n  }\n\n};\n\nGuiViewer3D.prototype.initExplodeSlider = function () {\n  logger.warn('viewer.initExplodeSlider() has been replaced by extension \"Autodesk.Explode\". initExplodeSlier() will be removed in version 7.0.0.');\n};\n\nGuiViewer3D.prototype.initInspectTools = function () {\n  var viewer = this;\n\n  var inspectToolsButton = new Button(\"toolbar-inspectTools\");\n  inspectToolsButton.setToolTip(\"Inspect\");\n  inspectToolsButton.setIcon(\"measure\");\n  inspectToolsButton.setVisible(false);\n  this.modelTools.addControl(inspectToolsButton);\n\n  var inspectSubmenu = new RadioButtonGroup('toolbar-inspectSubMenu');\n  inspectSubmenu.addClass('toolbar-vertical-group');\n  inspectSubmenu.setVisible(false);\n  this.modelTools.addControl(inspectSubmenu);\n\n  // Insert at the beginning so the CSS selector works.\n  inspectToolsButton.container.insertBefore(inspectSubmenu.container, inspectToolsButton.container.firstChild);\n\n  inspectToolsButton.onMouseOver = function () {\n    inspectSubmenu.setVisible(true);\n  };\n\n  inspectToolsButton.onMouseOut = function () {\n    inspectSubmenu.setVisible(false);\n  };\n\n  if (isTouchDevice()) {\n    inspectToolsButton.onClick = function (e) {\n      inspectSubmenu.setVisible(!inspectSubmenu.isVisible());\n    };\n  }\n};\n\n/**\n    * Changes visibility of buttons in toolbar to accommodate as many as possible\n    * given the available space.  Think of it as a media query applied to the viewer\n    * canvas only (as opposed to the whole website).\n    */\nGuiViewer3D.prototype.updateToolbarButtons = function (width, height) {\n\n  var toolbar = this.getToolbar();\n  if (!toolbar) return;\n\n  //logger.log(\"resized \" + width);\n  var ctrl, display;\n\n  // 310px threshold\n  display = width > 310 ? \"block\" : \"none\";\n  ctrl = this.modelTools.getControl('toolbar-explodeTool');\n  if (ctrl) ctrl.setDisplay(display);\n\n  // 380px threshold\n  display = width > 380 ? \"block\" : \"none\";\n  ctrl = this.modelTools.getControl('toolbar-collaborateTool');\n  if (ctrl) ctrl.setDisplay(display);\n\n  // 515px threshold\n  display = width > 515 ? \"block\" : \"none\";\n  var camMenu = this.navTools.getControl('toolbar-cameraSubmenuTool');\n  if (camMenu) {\n    camMenu.setDisplay(display);\n    ctrl = camMenu.subMenu.getControl('toolbar-homeTool');\n    if (ctrl) ctrl.setDisplay(this.navigation.isActionEnabled('gotoview') ? 'block' : 'none');\n    ctrl = camMenu.subMenu.getControl('toolbar-fitToViewTool');\n    if (ctrl) ctrl.setDisplay(this.navigation.isActionEnabled('gotoview') ? 'block' : 'none');\n    ctrl = camMenu.subMenu.getControl('toolbar-focalLengthTool');\n    if (ctrl) ctrl.setDisplay(this.navigation.isActionEnabled('fov') ? 'block' : 'none');\n    ctrl = camMenu.subMenu.getControl('toolbar-rollTool');\n    if (ctrl) ctrl.setDisplay(this.navigation.isActionEnabled('roll') ? 'block' : 'none');\n  }\n\n  // 700px threshold\n  display = width > 700 ? \"block\" : \"none\";\n  ctrl = this.modelTools.getControl('toolbar-measureTool');\n  if (ctrl) ctrl.setDisplay(display);\n  ctrl = this.modelTools.getControl('toolbar-sectionTool');\n  if (ctrl) ctrl.setDisplay(display);\n\n  // 740px threshold\n  display = width > 740 ? \"block\" : \"none\";\n  ctrl = this.navTools.getControl('toolbar-beelineTool');\n  if (ctrl) ctrl.setDisplay(this.navigation.isActionEnabled('walk') ? display : 'none');\n  ctrl = this.navTools.getControl('toolbar-firstPersonTool');\n  if (ctrl) ctrl.setDisplay(this.navigation.isActionEnabled('walk') ? display : 'none');\n  ctrl = this.navTools.getControl('toolbar-zoomTool');\n  if (ctrl) ctrl.setDisplay(this.navigation.isActionEnabled('zoom') ? display : 'none');\n  ctrl = this.navTools.getControl('toolbar-panTool');\n  if (ctrl) ctrl.setDisplay(this.navigation.isActionEnabled('pan') ? display : 'none');\n  ctrl = this.navTools.getControl('toolbar-orbitTools');\n  if (ctrl) ctrl.setDisplay(this.navigation.isActionEnabled('orbit') ? display : 'none');\n\n  if (this.customizeToolbarCB) this.customizeToolbarCB(this, width, height);\n};\n\n/**\n    * Register the function called after updateToolbarButtons. This allows the developer to customize the toolbar layout if needed.\n    * The callback will be called with the parameters (viewer_object, panel_width, panel_height). Its return type can be undefied and is ignored.\n    */\nGuiViewer3D.prototype.registerCustomizeToolbarCB = function (callbackFunction) {\n  this.customizeToolbarCB = callbackFunction;\n  this.updateToolbarButtons(this.container.clientWidth, this.container.clientHeight);\n};\n\n\n// Backwards compatibility for pre-v7.0 integrations.\nAutodesk.Viewing.Private.GuiViewer3D = GuiViewer3D;","\n\n/**\n * Fired after the toolbar UI gets instantiated.\n * @event Autodesk.Viewing#TOOLBAR_CREATED_EVENT\n */\nexport var TOOLBAR_CREATED_EVENT = 'toolbarCreated';\n\n/**\n                                                      * Fired after the Settings panel gets instantiated.\n                                                      * @event Autodesk.Viewing#SETTINGS_PANEL_CREATED_EVENT\n                                                      */\nexport var SETTINGS_PANEL_CREATED_EVENT = 'settingsPanelCreated';\n/**\n                                                                   * Fired after the ViewCube gets instantiated.\n                                                                   * @event Autodesk.Viewing#VIEW_CUBE_CREATED_EVENT\n                                                                   */\nexport var VIEW_CUBE_CREATED_EVENT = 'viewCubeCreated';\n\n/**\n                                                         * Viewer tools sets.\n                                                         *\n                                                         * These constants are used to define the standard set of tools.\n                                                         *\n                                                         * @enum {string}\n                                                         * @readonly\n                                                         * @memberof Autodesk.Viewing\n                                                         */\nexport var TOOLBAR = {\n  NAVTOOLSID: \"navTools\",\n  MODELTOOLSID: \"modelTools\",\n  SETTINGSTOOLSID: \"settingsTools\",\n  MEASURETOOLSID: \"measureTools\" };","// extracted by mini-css-extract-plugin","\nimport { i18n } from \"../globalization/i18next\";\n\n\n/** @constructor */\nexport function HudMessage() {\n}\n\nHudMessage.instances = [];\n\n// static\nHudMessage.displayMessage = function (container, messageSpecs, closeCB, buttonCB, checkboxCB) {\n\n\n  var _document = container.ownerDocument;\n  var _window = _document.defaultView || _document.parentWindow;\n\n  function getClientHeight(element) {\n    var style = _window.getComputedStyle(element);\n\n    var margin = {\n      top: parseInt(style[\"margin-top\"]),\n      bottom: parseInt(style[\"margin-bottom\"]) };\n\n\n    var rect = element.getBoundingClientRect();\n    return rect.height + margin.top + margin.bottom;\n  };\n\n  /**\n     * Get the styles of the specified html element.\n     * @param {HTMLElement} element - html element that is used to get the specified styles\n     * @param {String[]|String} stylesToGet - An array of style names\n     * @param {Object} assignToObject - (Optional) if passed in, the element's styles are coppied to this object\n     * @returns {Object|String} - returns an object if stylesToGet is an array, otherwise returns a string\n     */\n  function getElementStyles(element, stylesToGet, assignToObject) {\n    var eleStyle = _window.getComputedStyle(element, null);\n    if (!Array.isArray(stylesToGet))\n    return eleStyle[stylesToGet];\n\n    var styles = assignToObject ? assignToObject : {};\n    for (var i = 0; i < stylesToGet.length; i++) {\n      var styleName = stylesToGet[i];\n      styles[styleName] = eleStyle[styleName];\n    }\n    return styles;\n  }\n\n  /**\n     * Return the width of the text\n     * @param {HTMLElement} element - text/title element\n     * @returns {String} - Width in pixels\n     */\n  function getTextWidth(element) {\n    var text = element.textContent;\n    var stylesToCopy = ['font-size', 'font-weight', 'text-transform', 'padding', 'white-space', 'font-family'];\n    var ruler = _document.createElement('span');\n    // Copy the element's styles to the ruler element\n    getElementStyles(element, stylesToCopy, ruler.style);\n    ruler.textContent = text;\n    ruler.style.position = 'absolute';\n    ruler.style.top = '10000px';\n    ruler.style.left = '-10000px';\n    _document.body.appendChild(ruler);\n    var width = ruler.offsetWidth;\n    _document.body.removeChild(ruler);\n    return width;\n  };\n\n  // If hud message is already up, return.\n  if (HudMessage.instances.length > 0)\n  return;\n\n  var msgTitle = messageSpecs.msgTitleKey;\n  var msgTitleDefault = messageSpecs.msgTitleDefaultValue || msgTitle;\n  var message = messageSpecs.messageKey;\n  var messageDefault = messageSpecs.messageDefaultValue || message;\n  var buttonText = messageSpecs.buttonText;\n  var checkboxChecked = messageSpecs.checkboxChecked || false;\n\n  var hudMessage = _document.createElement(\"div\");\n  hudMessage.classList.add(\"docking-panel\");\n  hudMessage.classList.add(\"hud\");\n\n  container.appendChild(hudMessage);\n\n  var title = _document.createElement(\"div\");\n  title.classList.add(\"docking-panel-title\");\n  title.classList.add(\"docking-panel-delimiter-shadow\");\n  title.textContent = i18n.translate(msgTitle, { \"defaultValue\": msgTitleDefault });\n  title.setAttribute(\"data-i18n\", msgTitle);\n  hudMessage.appendChild(title);\n\n  var closeButton;\n  if (closeCB) {\n    closeButton = _document.createElement(\"div\");\n    closeButton.classList.add(\"docking-panel-close\");\n    closeButton.addEventListener('click', function (e) {\n      HudMessage.dismiss();\n      if (closeCB)\n      closeCB(e);\n    });\n    hudMessage.appendChild(closeButton);\n  }\n\n  var titleStyle = getElementStyles(title, ['width', 'font-size']);\n  var titleWidth = getTextWidth(title);\n  var fontSize = parseFloat(titleStyle['font-size']);\n  // Take into account the close button. The title should not overlap it.\n  var closeButtonWidth = closeButton ? parseFloat(getElementStyles(closeButton, 'width')) : 0;\n  // Title cannot overlap the close button\n  var defaultTitleWidth = parseFloat(titleStyle['width']) - closeButtonWidth;\n  // Calculate the font-size and assign it to the title\n  title.style['font-size'] = titleWidth > defaultTitleWidth ? \"\".concat(defaultTitleWidth / titleWidth * fontSize, \"px\") : \"\".concat(fontSize, \"px\");\n\n  var client = _document.createElement(\"div\");\n  client.classList.add(\"hud-client\");\n  client.classList.add(\"docking-panel-container-solid-color-b\");\n\n  hudMessage.appendChild(client);\n\n  var text = _document.createElement(\"div\");\n  text.className = \"hud-message\";\n  text.textContent = i18n.translate(message, { \"defaultValue\": messageDefault });\n  text.setAttribute(\"data-i18n\", messageDefault);\n  client.appendChild(text);\n\n  var clientHeight = getClientHeight(text);\n  if (buttonCB) {\n    var button = _document.createElement(\"div\");\n    button.classList.add(\"docking-panel-primary-button\");\n    button.classList.add(\"hud-button\");\n    button.textContent = i18n.translate(buttonText, { \"defaultValue\": buttonText });\n    button.setAttribute(\"data-i18n\", buttonText);\n    button.addEventListener(\"click\", buttonCB);\n    client.appendChild(button);\n    clientHeight += getClientHeight(button);\n  }\n\n  if (checkboxCB) {\n    var checkbox = _document.createElement(\"div\");\n    var cb = _document.createElement(\"input\");\n    cb.className = \"hud-checkbox\";\n    cb.type = \"checkbox\";\n    cb.checked = checkboxChecked;\n    checkbox.appendChild(cb);\n\n    var checkboxText = \"Do not show this message again\"; // localized below\n\n    var lbl = _document.createElement(\"label\");\n    lbl.setAttribute('for', checkboxText);\n    lbl.setAttribute(\"data-i18n\", checkboxText);\n    lbl.textContent = i18n.translate(checkboxText, { \"defaultValue\": checkboxText });\n    checkbox.appendChild(lbl);\n    cb.addEventListener(\"change\", checkboxCB);\n    client.appendChild(checkbox);\n    clientHeight += getClientHeight(checkboxCB);\n  }\n\n  client.style.height = clientHeight + 'px';\n  hudMessage.style.height = clientHeight + getClientHeight(title) + 'px';\n\n  var instance = { hudMessage: hudMessage, container: container };\n  HudMessage.instances.push(instance);\n};\n\nHudMessage.dismiss = function () {\n  // dismiss the topmost alert box\n  if (HudMessage.instances.length > 0) {\n    var instance = HudMessage.instances.pop();\n    instance.hudMessage.style.visibility = \"hidden\";\n    instance.container.removeChild(instance.hudMessage);\n    return true;\n  }\n  return false;\n};","function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}import { GlobalManagerMixin } from '../application/GlobalManagerMixin';\n\nexport var LightPresetThumbnails = /*#__PURE__*/function () {\n\n  function LightPresetThumbnails(width, height) {_classCallCheck(this, LightPresetThumbnails);\n    this._width = width || 60;\n    this._height = height || 60;\n  }\n\n  /**\n     * Generates a thumbnail from a preset.\n     * \n     * @param {*} lightPreset - Object describing a lightPreset (such as 'Simple Grey' or 'Sharp Highlights').\n     * @returns {Promise} Resolves with a string URL containing the image. Can be assigned to <image>.src\n     */_createClass(LightPresetThumbnails, [{ key: \"createThumbnail\", value: function createThumbnail(\n    preset, calback) {var _this = this;\n\n      return new Promise(function (resolve) {\n\n        var _document = _this.getDocument();\n        var _canvas = _document.createElement('canvas');\n        _canvas.width = _this._width;\n        _canvas.height = _this._height;\n\n        var ctx = _canvas.getContext('2d');\n\n        // Create a linear gradient (top to bottom)\n        var gradient = ctx.createLinearGradient(0, 0, 0, _canvas.height);\n        var pcg = preset.bgColorGradient; // Array with 6 elements\n        var colorTop = getHexColor(pcg[0], pcg[1], pcg[2]);\n        var colorBtm = getHexColor(pcg[3], pcg[4], pcg[5]);\n        gradient.addColorStop(0, colorTop);\n        gradient.addColorStop(1, colorBtm);\n        ctx.fillStyle = gradient;\n        ctx.fillRect(0, 0, _canvas.width, _canvas.height);\n\n        _canvas.toBlob(function (blob) {\n          var url = URL.createObjectURL(blob);\n          resolve(url);\n        });\n      });\n    } }]);return LightPresetThumbnails;}();\n\n\nGlobalManagerMixin.call(LightPresetThumbnails.prototype);\n\n\n/**\n                                                           * @param {number} r - Range 0..255\n                                                           * @param {number} g - Range 0..255\n                                                           * @param {number} b - Range 0..255\n                                                           * @returns {string} - Such as \"#FF0000\" for red (255,0,0)\n                                                           */\nfunction getHexColor(r, g, b) {\n  r = parseInt(r);\n  g = parseInt(g);\n  b = parseInt(b);\n  return '#' + decToHex(r) + decToHex(g) + decToHex(b);\n}\n\n/**\n   * @param {number} dec - Accepts values betwen [0..255]\n   * @returns {string} - with length 2\n   */\nfunction decToHex(dec) {\n  if (dec === 0)\n  return '00';\n  var ret = '';\n  var val = dec > 255 ? 255 : dec;\n  while (val !== 0) {\n    var rem = val % 16;\n    val = val / 16 | 0;\n    ret = _MAPPING[rem.toString()] + ret;\n  }\n  return ret.length > 1 ? ret : '0' + ret;\n}\n\nvar _MAPPING = {\n  '0': '0',\n  '1': '1',\n  '2': '2',\n  '3': '3',\n  '4': '4',\n  '5': '5',\n  '6': '6',\n  '7': '7',\n  '8': '8',\n  '9': '9',\n  '10': 'A',\n  '11': 'B',\n  '12': 'C',\n  '13': 'D',\n  '14': 'E',\n  '15': 'F' };","// extracted by mini-css-extract-plugin","\nimport { i18n } from \"../globalization/i18next\";\nimport { GlobalManagerMixin } from '../application/GlobalManagerMixin';\n\n// Output similar to: https://jsfiddle.net/mmsgxwvf/1/\nexport function LoadingSpinner(parentDiv) {\n\n  this.parentDiv = parentDiv;\n  var _document = this.getDocument();\n  this.container = _document.createElement('div');\n  this.container.innerHTML = [\n  '<div class=\"path\">',\n  '<svg width=\"100%\" height=\"100%\" viewBox=\"0 0 100 100\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">',\n  '<path d=\"M2.5,50a47.5,47.5 0 1,0 95,0a47.5,47.5 0 1,0 -95,0\" vector-effect=\"non-scaling-stroke\"/>',\n  '<path d=\"M 2.5 50 A 47.5 47.5 0 0 1 47.5 2.5\" vector-effect=\"non-scaling-stroke\"/>',\n  '</svg>',\n  '</div>',\n  '<div class=\"message\" data-i18n=\"Spinner Loading\">LOADING</div>'].\n  join('');\n  this.container.className = 'loading-spinner';\n}\n\nGlobalManagerMixin.call(LoadingSpinner.prototype);\n\nLoadingSpinner.prototype.addClass = function (className) {\n  this.container.classList.add(className);\n};\n\nLoadingSpinner.prototype.attachToDom = function () {\n  if (!this.container.parentNode) {\n    i18n.localize(this.container);\n    this.parentDiv.appendChild(this.container);\n    return true;\n  }\n  return false;\n};\n\nLoadingSpinner.prototype.removeFromDom = function () {\n  if (this.container.parentNode) {\n    this.container.parentNode.removeChild(this.container);\n    return true;\n  }\n  return false;\n};\n\nLoadingSpinner.prototype.setVisible = function (visible) {\n  if (visible) {\n    this.attachToDom();\n  } else\n  {\n    this.removeFromDom();\n  }\n};","// extracted by mini-css-extract-plugin","\nimport { DockingPanel } from \"./DockingPanel\";\nimport { TreeOnDemand } from \"./TreeOnDemand\";\nimport { ModelStructureTreeDelegate } from \"./ModelStructureTreeDelegate\";\n\n\n/**\n                                                                            * The Model Structure Panel allows users to explore and set the visibility and selection states of the nodes defined in the loaded model.\n                                                                            *\n                                                                            * @alias Autodesk.Viewing.UI.ModelStructurePanel\n                                                                            * @augments Autodesk.Viewing.UI.DockingPanel\n                                                                            * @param {HTMLElement} parentContainer - The container for this panel.\n                                                                            * @param {string} id - The id for this panel.\n                                                                            * @param {string} title - The initial title for this panel.\n                                                                            * @param {object} [options] - An optional dictionary of options.\n                                                                            * @param {boolean} [options.startCollapsed=true] - When true, collapses all of the nodes under the root.\n                                                                            * @constructor\n                                                                            */\nexport function ModelStructurePanel(parentContainer, id, title, options)\n{\n  DockingPanel.call(this, parentContainer, id, title, options);\n\n  this.container.classList.add('model-structure-panel');\n\n  options = options || {};\n  if (!options.heightAdjustment)\n  options.heightAdjustment = 40;\n  if (!options.marginTop)\n  options.marginTop = 0;\n  options.left = true;\n\n  this.createScrollContainer(options);\n  this.onScroll = this.onScroll.bind(this);\n  this.scrollContainer.addEventListener('scroll', this.onScroll);\n  this.scrollContainer.style['overflow-x'] = 'hidden';\n\n  this.options = options;\n  this.tree = null;\n  this._pendingModels = [];\n  this.uiCreated = false;\n\n  var that = this;\n  this.addVisibilityListener(function (show) {\n    if (show) {\n      if (!that.uiCreated) {\n        that.createUI();\n      }\n\n      that.resizeToContent();\n    }\n  });\n}\n\nModelStructurePanel.prototype = Object.create(DockingPanel.prototype);\nModelStructurePanel.prototype.constructor = ModelStructurePanel;\n\nModelStructurePanel.prototype.uninitialize = function (model) {\n  this.scrollContainer.addEventListener('scroll', this.onScroll);\n  this.scrollContainer.parentNode.removeChild(this.scrollContainer);\n\n  DockingPanel.prototype.uninitialize.call(this);\n};\n\n/**\n    * Handler for when a model gets added into the scene.\n    *\n    * @param {Autodesk.Viewing.Model} model - The model being added into the scene.\n    */\nModelStructurePanel.prototype.addModel = function (model)\n{\n  if (!model)\n  return;\n\n  if (this.uiCreated) {\n    this.createTreeUI(model);\n  } else {\n    var index = this._pendingModels.indexOf(model);\n    if (index !== -1)\n    return;\n    this._pendingModels.push(model);\n  }\n};\n\n/**\n    * Handler for when a model gets removed from the scene.\n    * \n    * @param {Autodesk.Viewing.Model} model - The model being added into the scene.\n    */\nModelStructurePanel.prototype.unloadModel = function (model)\n{\n  if (!model)\n  return;\n\n  if (this.uiCreated) {\n    this.removeTreeUI(model);\n  } else {\n    var index = this._pendingModels.indexOf(model);\n    if (index === -1)\n    return;\n    this._pendingModels.splice(index, 1);\n  }\n};\n\n/**\n    * Used for delayed initialization of the HTML DOM tree\n    * @private\n    */\nModelStructurePanel.prototype.createUI = function ()\n{\n  if (this.uiCreated)\n  return;\n\n  // Title\n  var title = \"\";\n  var localizeTitle;\n  if (this.options && this.options.defaultTitle) {\n    title = this.options.defaultTitle;\n    localizeTitle = this.options.localizeTitle !== undefined ? !!this.options.localizeTitle : true;\n  } else {\n    title = this.modelTitle;\n    localizeTitle = false;\n  }\n  if (!title) {\n    title = \"Browser\";\n    localizeTitle = true;\n  }\n\n  this.setTitle(title, { localizeTitle: localizeTitle });\n  this.uiCreated = true;\n\n  this.tree = new TreeOnDemand(this.scrollContainer, this.options);\n  this.tree.setGlobalManager(this.globalManager);\n\n  if (this._pendingModels.length === 0) {\n    // Do nothing, we get an empty model browser panel.\n    return;\n  }\n\n  // Create Tree UI for models\n  for (var i = 0; i < this._pendingModels.length; ++i) {\n    this.createTreeUI(this._pendingModels[i]);\n  }\n  this._pendingModels = [];\n};\n\nModelStructurePanel.prototype.createTreeUI = function (model) {\n  if (this.tree.getDelegate(model.id)) {\n    // Don't allow register a second delegate for the same model.\n    return false;\n  }\n\n  var delegate = new ModelStructureTreeDelegate(this, model);\n  delegate.setGlobalManager(this.globalManager);\n  this.tree.pushDelegate(delegate);\n\n  var _this = this;\n  model.getObjectTree(\n  function onSuccess(instanceTree) {\n    _this.setInstanceTree(delegate, instanceTree);\n  },\n  function onFailure() {\n    _this.setInstanceTree(delegate, null);\n  });\n\n  return true;\n};\n\n/**\n    * Can be overriden by sub-classes\n    */\nModelStructurePanel.prototype.setInstanceTree = function (delegate, instanceTree) {\n  this.tree.setInstanceTree(delegate, instanceTree);\n};\n\nModelStructurePanel.prototype.removeTreeUI = function (model) {\n  if (this.tree.removeDelegate(model.id)) {\n    this.scrollContainer.scrollTop = 0;\n    this.onScroll();\n  }\n};\n\nModelStructurePanel.prototype.onScroll = function (event) {\n  this.tree.setScroll(this.scrollContainer.scrollTop);\n};\n\n/**\n    * Override this method to specify the label for a node.\n    * By default, this is the node's name, or 'Object ' + object id if the name\n    * is blank.\n    *\n    * @param {Object} node - A node in an Autodesk.Viewing.Model\n    * @returns {string} Label of the tree node\n    */\nModelStructurePanel.prototype.getNodeLabel = function (node)\n{\n  return this.myDelegate.getNodeLabel(node);\n};\n\n\nModelStructurePanel.prototype.onTreeNodeClick = function (tree, dbId, model, event)\n{\n  throw new Error('Method must be overriden.');\n};\n\nModelStructurePanel.prototype.onTreeNodeRightClick = function (tree, node, model, event)\n{\n  throw new Error('Method must be overriden.');\n};\n\n/**\n    * Override this method to be notified when the user clicks on the title.\n    * @override\n    * @param {Event} event\n    */\nModelStructurePanel.prototype.onTitleClick = function (event)\n{\n  // Do nothing by default.\n};\n\n/**\n    * Override this method to be notified when the user double-clicks on the title.\n    * @override\n    * @param {Event} event\n    */\nModelStructurePanel.prototype.onTitleDoubleClick = function (event)\n{\n  // Do nothing by default.\n};","// extracted by mini-css-extract-plugin","function _typeof(obj) {\"@babel/helpers - typeof\";if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {_typeof = function _typeof(obj) {return typeof obj;};} else {_typeof = function _typeof(obj) {return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;};}return _typeof(obj);}\nimport { TreeDelegate } from \"./TreeDelegate\";\nimport { logger } from \"../logger/Logger\";\nimport { getResourceUrl } from \"../globals\";\nimport { i18n } from \"../globalization/i18next\";\n\n\n// Constants - State\nvar STATE_LOADING = 1;\nvar STATE_AVAILABLE = 2;\nvar STATE_NOT_AVAILABLE = 3;\n\n// Constants - ids\n// All valid ids in the instanceTree are based off of 1.\n// Using negative values to detect special situations.\nvar ID_LOADING = -1;\nvar ID_NOT_AVAILABLE = -2;\n\n// Dummy root - See PropWorker.js\nvar SYNTHETIC_ROOT_ID = -1e10;\n\n\nexport function ModelStructureTreeDelegate(panel, model) {\n  TreeDelegate.call(this);\n\n  this.panel = panel;\n  this.model = model;\n\n  var _document = this.getDocument();\n  this.modelDiv = _document.createElement('div');\n  this.modelDiv.classList.add('model-div');\n  this.modelDiv.setAttribute('lmv-modelId', model.id);\n\n  this.instanceTree = null;\n  this.rootId = ID_LOADING;\n  this.state = STATE_LOADING;\n}\n\nModelStructureTreeDelegate.prototype = Object.create(TreeDelegate.prototype);\nModelStructureTreeDelegate.prototype.constructor = ModelStructureTreeDelegate;\n\n\nModelStructureTreeDelegate.prototype.isLoading = function () {\n  return this.state === STATE_LOADING;\n};\n\nModelStructureTreeDelegate.prototype.isAvailable = function () {\n  return this.state === STATE_AVAILABLE;\n};\n\nModelStructureTreeDelegate.prototype.isNotAvailable = function () {\n  return this.state === STATE_NOT_AVAILABLE;\n};\n\nModelStructureTreeDelegate.prototype.isControlId = function (dbId) {\n  return dbId === ID_LOADING || dbId === ID_NOT_AVAILABLE;\n};\n\nModelStructureTreeDelegate.prototype.getControlIdCss = function (dbId) {\n  if (dbId === ID_LOADING) {\n\n  }\n  if (dbId === ID_NOT_AVAILABLE) {\n\n  }\n  return null;\n};\n\nModelStructureTreeDelegate.prototype.getRootId = function ()\n{\n  return this.rootId;\n};\n\nModelStructureTreeDelegate.prototype.getTreeNodeId = function (node)\n{\n  if (_typeof(node) == \"object\") {\n    logger.warn(\"Object used instead of dbId. Fix it.\");\n    return node.dbId;\n  } else\n  return node;\n};\n\nModelStructureTreeDelegate.prototype.getTreeNodeIndex = function (nodeId)\n{\n  return this.instanceTree.nodeAccess.dbIdToIndex[nodeId];\n};\n\nModelStructureTreeDelegate.prototype.getTreeNodeLabel = function (dbId)\n{\n  if (dbId === ID_LOADING) {\n    var modelName = getModelName(this.model);\n    return i18n.translate('Loading model', { name: modelName });\n  }\n\n  if (dbId === ID_NOT_AVAILABLE) {\n    var modelName = getModelName(this.model);\n    return modelName; // Just show the file name, without any children.\n  }\n\n  // For multi-model cases allow overriding of the model display name.\n  // Used where only host application knows true model display name.\n  if (dbId === this.getRootId()) {\n    var modelName = getModelName(this.model);\n    return modelName;\n  }\n\n  // Special case...\n  if (dbId == SYNTHETIC_ROOT_ID) {\n    return 'Object 0';\n  }\n\n  var res = this.instanceTree.getNodeName(dbId, true);\n  return res || 'Object ' + dbId;\n};\n\nModelStructureTreeDelegate.prototype.getTreeNodeClass = function (dbId)\n{\n  if (dbId === ID_LOADING || dbId === ID_NOT_AVAILABLE)\n  return 'message-unexpected';\n\n  return '';\n};\n\nModelStructureTreeDelegate.prototype.getTreeNodeParentId = function (nodeId)\n{\n  // Required to abort parent traversal\n  if (nodeId === SYNTHETIC_ROOT_ID) {\n    return 0;\n  }\n\n  var parentId = this.instanceTree.nodeAccess.getParentId(nodeId);\n\n  // UI handles parent 0 via the synthetic id.\n  if (parentId === 0) {\n    return SYNTHETIC_ROOT_ID;\n  }\n\n  return parentId;\n};\n\nModelStructureTreeDelegate.prototype.getTreeNodeCount = function ()\n{\n  return this.instanceTree.nodeAccess.getNumNodes();\n};\n\nModelStructureTreeDelegate.prototype.getTreeNodeClientHeight = function (dbId)\n{\n  return 36;\n};\n\nModelStructureTreeDelegate.prototype.getTreeNodeDepthOffset = function (node, depth)\n{\n  return 13 + 25 * depth;\n};\n\nModelStructureTreeDelegate.prototype.isTreeNodeGroup = function (dbId)\n{\n  if (this.isControlId(dbId)) {\n    return false;\n  }\n  return this.instanceTree.getChildCount(dbId) > 0;\n};\n\nModelStructureTreeDelegate.prototype.shouldCreateTreeNode = function (dbId)\n{\n  return true;\n};\n\nModelStructureTreeDelegate.prototype.createTreeNode = function (id, parent) {\n\n  var self = this;\n  var _document = self.getDocument();\n  // hightlight.\n  parent.addEventListener('mousedown', function () {\n\n    var onMouseUp = function () {\n      this.classList.remove('highlight');\n      self.removeDocumentEventListener('mouseup', onMouseUp);\n    }.bind(parent);\n\n    parent.classList.add('highlight');\n    self.addDocumentEventListener('mouseup', onMouseUp);\n  });\n\n  // visibility button.\n  if (!this.isControlId(id)) {\n    var button = _document.createElement('div');\n    button.dbId = id;\n    button.classList.add('visibility');\n\n    button.addEventListener('mousedown', function (event) {\n      event.preventDefault();\n      event.stopPropagation();\n    });\n\n    button.addEventListener('click', function (event) {\n      event.preventDefault();\n      event.stopPropagation();\n      var dbId = parseInt(event.target.dbId);\n      this.panel.onEyeIcon(dbId, this.model);\n    }.bind(this));\n\n    parent.appendChild(button);\n  }\n\n  // Add loading spinner\n  if (id === ID_LOADING) {\n    var img = _document.createElement('img');\n    img.src = getResourceUrl('res/ui/spinner.png');\n    img.style.animation = 'loading-spinner-perpetual-motion 1s infinite linear';\n    img.style.float = 'right';\n    img.style.marginRight = '5px';\n    img.style.width = '20px';\n    parent.appendChild(img);\n  }\n\n  // Delegate rest of the node creation.\n  var opts = { localize: id === ID_LOADING || id === ID_NOT_AVAILABLE };\n  TreeDelegate.prototype.createTreeNode.call(this, id, parent, opts);\n};\n\nModelStructureTreeDelegate.prototype.onTreeNodeRightClick = function (tree, node, event)\n{\n  if (!this.isControlId(node)) {\n    this.panel.onTreeNodeRightClick(tree, node, this.model, event);\n  }\n};\n\n\nModelStructureTreeDelegate.prototype.onTreeNodeClick = function (tree, dbId, event)\n{\n  if (!this.isControlId(dbId)) {\n    this.panel.onTreeNodeClick(tree, dbId, this.model, event);\n  }\n};\n\nModelStructureTreeDelegate.prototype.onTreeNodeDoubleClick = function (tree, node, event)\n{\n  // nothing.\n};\n\nModelStructureTreeDelegate.prototype.onTreeNodeIconClick = function (tree, node, event)\n{\n  if (this.isTreeNodeGroup(node)) {\n    var isCollapsed = tree.isCollapsed(this, node);\n    tree.setCollapsed(this, node, !isCollapsed);\n  }\n};\n\nModelStructureTreeDelegate.prototype.onTreeNodeReized = function (tree)\n{\n  // nothing.\n};\n\nModelStructureTreeDelegate.prototype.forEachChild = function (dbId, callback, recursive)\n{\n  if (!this.isControlId(dbId)) {\n    this.instanceTree.enumNodeChildren(dbId, callback, recursive);\n  }\n};\n\n\nModelStructureTreeDelegate.prototype.setInstanceTree = function (instanceTree)\n{\n  this.instanceTree = instanceTree;\n  this.state = instanceTree ? STATE_AVAILABLE : STATE_NOT_AVAILABLE;\n  this.rootId = instanceTree ? instanceTree.getRootId() : ID_NOT_AVAILABLE;\n  setInstanceTreeAux(this);\n};\n\nfunction setInstanceTreeAux(delegate) {\n  var instanceTree = delegate.instanceTree;\n\n  if (!instanceTree)\n  return;\n\n  var rootId = delegate.rootId;\n  var rootName = instanceTree.getNodeName(rootId);\n  var childName;\n  var childId = 0;\n  var childCount = 0;\n  instanceTree.enumNodeChildren(rootId, function (child) {\n    if (!childCount) {\n      childName = instanceTree.getNodeName(child);\n      childId = child;\n    }\n    childCount++;\n  });\n\n  // Detect Fusion models which have a root inside a root\n  delegate.hasDoubleRoot = childCount === 1 && rootName === childName;\n  delegate.rootId = delegate.hasDoubleRoot ? childId : rootId;\n};\n\nModelStructureTreeDelegate.prototype.clean = function ()\n{\n  var container = this.modelDiv;\n  var child;\n  while (child = container.lastChild) {\n    container.removeChild(child);\n  }\n};\n\n/**\n    * Helper function that returns the name of the seed file as registered in DS/OSS.\n    * @param {*} model \n    */\nfunction getModelName(model) {\n\n  // Use name override if specified\n  var modelName = getModelNameOverride(model);\n  if (modelName) {\n    return modelName;\n  }\n\n  var modelData = model.getData();\n  if (!modelData) {\n    return '';\n  }\n\n  // Standard case: For models loaded with loadDocumentNode(), we obtain the name from the manifest.\n  var node = model.getDocumentNode();\n  if (node) {\n    return node.getModelName();\n  }\n\n  // We cannot determine the model name. Just display a dummy placeholder.\n  return 'Model';\n};\n\n/**\n    * Helper function that returns model name override.\n    * Used for cases where only the host application knows the true model name.\n    * @param {*} model \n    */\nfunction getModelNameOverride(model) {\n  var modelData = model.getData();\n  if (modelData && modelData.loadOptions && modelData.loadOptions.modelNameOverride) {\n    return modelData.loadOptions.modelNameOverride;\n  }\n  return '';\n};","\nimport { ContextMenu } from \"./ContextMenu\";\nimport { GlobalManagerMixin } from '../application/GlobalManagerMixin';\n\n/**\n                                                                         * Context Menu object is the base class for the viewer's context menus.\n                                                                         *\n                                                                         * @alias Autodesk.Viewing.UI.ObjectContextMenu\n                                                                         * @param {Autodesk.Viewing.Viewer3D} viewer - Viewer instance.\n                                                                         * @constructor\n                                                                         */\nexport function ObjectContextMenu(viewer) {\n  this.viewer = viewer;\n  this.setGlobalManager(viewer.globalManager);\n  this.contextMenu = new ContextMenu(viewer);\n}\n\nObjectContextMenu.prototype.constructor = ObjectContextMenu;\nGlobalManagerMixin.call(ObjectContextMenu.prototype);\n\n/**\n                                                       * Shows the context menu.\n                                                       * @param {Event} event - Browser event that requested the context menu.\n                                                       */\nObjectContextMenu.prototype.show = function (event) {\n  var numSelected = this.viewer.getSelectionCount(),\n  visibility = this.viewer.getSelectionVisibility(),\n  rect = this.viewer.impl.getCanvasBoundingClientRect(),\n  status = {\n    event: event,\n    numSelected: numSelected,\n    hasSelected: 0 < numSelected,\n    hasVisible: visibility.hasVisible,\n    hasHidden: visibility.hasHidden,\n    canvasX: event.clientX - rect.left,\n    canvasY: event.clientY - rect.top },\n\n  menu = this.buildMenu(event, status);\n\n  this.viewer.runContextMenuCallbacks(menu, status);\n\n  if (menu && 0 < menu.length) {\n    this.contextMenu.show(event, menu);\n  }\n};\n\n/**\n    * Hides the context menu.\n    * @returns {boolean} True if the context menu was open, false otherwise.\n    */\nObjectContextMenu.prototype.hide = function () {\n  return this.contextMenu.hide();\n};\n\n/**\n    * Builds the context menu to be displayed.\n    * Override this method to change the context menu.\n    *\n    * Sample menu item:\n    * `{title: 'This is a menu item', target: function () {alert('Menu item clicked');}}`.\n    * A submenu can be specified by providing an array of submenu items as the target.\n    * @param {Event} event - Browser event that requested the context menu.\n    * @param {object} status - Information about nodes.\n    * @param {number} status.numSelected - The number of selected objects.\n    * @param {boolean} status.hasSelected - True if there is at least one selected object.\n    * @param {boolean} status.hasVisible - True if at least one selected object is visible.\n    * @param {boolean} status.hasHidden - True if at least one selected object is hidden.\n    * @returns {array} An array of menu items.\n    */\nObjectContextMenu.prototype.buildMenu = function (event, status) {\n  return null;\n};","// extracted by mini-css-extract-plugin","// extracted by mini-css-extract-plugin","\nexport function ProgressBar(container) {\n\n  var _document = container.ownerDocument;\n\n  this.bg = _document.createElement('div');\n  this.bg.className = 'progressbg';\n\n  this.fg = _document.createElement('div');\n  this.fg.className = 'progressfg';\n\n  this.bg.appendChild(this.fg);\n  container.appendChild(this.bg);\n\n  this.lastValue = -1;\n\n  this.fg.style.width = \"0%\";\n\n};\n\nProgressBar.prototype.setPercent = function (pct) {\n\n  if (pct == this.lastValue)\n  return;\n\n  this.lastValue = pct;\n\n  if (pct >= 99) {\n    this.bg.style.visibility = \"hidden\";\n  } else {\n    this.bg.style.visibility = \"visible\";\n    this.fg.style.width = pct + \"%\";\n  }\n};\n\nProgressBar.prototype.setStyle = function (style) {\n  !this.fg.classList.contains(style) && this.fg.classList.add(style);\n};\n\nProgressBar.prototype.removeStyle = function (style) {\n  this.fg.classList.contains(style) && this.fg.classList.remove(style);\n};","// extracted by mini-css-extract-plugin","\nimport { DockingPanel } from \"./DockingPanel\";\nimport { TreeDelegate } from \"./TreeDelegate\";\nimport { Tree } from \"./Tree\";\nimport { formatValueWithUnits, calculatePrecision, convertToDisplayUnits } from \"../measurement/UnitFormatter\";\nimport { i18n } from \"../globalization/i18next\";\n\n\n/**\n                                                  * The Property Panel displays properties from the whole model or specific parts of it.\n                                                  * \n                                                  * @alias Autodesk.Viewing.UI.PropertyPanel\n                                                  * @augments Autodesk.Viewing.UI.DockingPanel\n                                                  * @param {HTMLElement} parentContainer - The container for this panel.\n                                                  * @param {string} id - The id for this panel.\n                                                  * @param {string} title - The initial title for this panel.\n                                                  * @param {object} [options] - An optional dictionary of options. Currently unused.\n                                                  * @constructor\n                                                  */\nexport function PropertyPanel(parentContainer, id, title, options) {\n  DockingPanel.call(this, parentContainer, id, title, options);\n\n  this.title.classList.add(\"docking-panel-delimiter-shadow\");\n  this.container.classList.add('property-panel');\n  this.container.dockRight = true;\n\n  this.createScrollContainer({ left: false, heightAdjustment: 70, marginTop: 0 });\n\n  this.highlightableElements = {};\n\n  var that = this;\n\n  function createDelegate() {\n    var delegate = new TreeDelegate();\n    delegate.setGlobalManager(that.globalManager);\n\n    function isCategory(object) {\n      return object.type === 'category';\n    }\n\n    delegate.getTreeNodeId = function (node) {\n      return node.name + (node.hasOwnProperty('value') ? node.value : '') + (node.hasOwnProperty('category') ? node.category : '');\n    };\n\n    delegate.getTreeNodeClass = function (node) {\n      return isCategory(node) ? that.getCategoryClass(node) : that.getPropertyClass(node);\n    };\n\n    delegate.isTreeNodeGroup = function (node) {\n      return isCategory(node);\n    };\n\n    delegate.onTreeNodeClick = function (tree, node, event) {\n      if (isCategory(node)) {\n        that.onCategoryClick(node, event);\n      } else {\n        that.onPropertyClick(node, event);\n      }\n    };\n\n    delegate.onTreeNodeRightClick = function (tree, node, event) {\n      if (isCategory(node)) {\n        that.onCategoryRightClick(node, event);\n      } else {\n        that.onPropertyRightClick(node, event);\n      }\n    };\n\n    delegate.onTreeNodeDoubleClick = function (tree, node, event) {\n      if (isCategory(node)) {\n        that.onCategoryDoubleClick(node, event);\n      } else {\n        that.onPropertyDoubleClick(node, event);\n      }\n    };\n\n    delegate.onTreeNodeIconClick = function (tree, node, event) {\n      if (isCategory(node)) {\n        that.onCategoryIconClick(node, event);\n      } else {\n        that.onPropertyIconClick(node, event);\n      }\n    };\n\n    delegate.createTreeNode = function (node, parent, options) {\n      var highlightableElements = null;\n      if (isCategory(node)) {\n        highlightableElements = that.displayCategory(node, parent, options);\n      } else {\n        highlightableElements = that.displayProperty(node, parent, options);\n      }\n\n      if (highlightableElements) {\n        that.highlightableElements[this.getTreeNodeId(node)] = highlightableElements;\n      }\n    };\n\n    return delegate;\n  }\n\n  var delegate = createDelegate();\n  this.tree = new Tree(delegate, null, this.scrollContainer, {});\n  this.tree.setGlobalManager(this.globalManager);\n}\n\nPropertyPanel.prototype = Object.create(DockingPanel.prototype);\nPropertyPanel.prototype.constructor = PropertyPanel;\n\n/**\n                                                      * Adds the given properties to the display panel.\n                                                      * @param {Array} properties - An array of properties, each property represented as {displayName: name, displayValue: value}.\n                                                      * @param {Object=} [options] - An optional dictionary of options.  Currently unused.\n                                                      */\nPropertyPanel.prototype.setProperties = function (properties, options) {\n  this.removeAllProperties();\n\n  // Check if any categories need to be displayed.\n  //\n  var withCategories = [];\n  var withoutCategories = [];\n\n  for (var i = 0; i < properties.length; i++) {\n    var property = properties[i];\n    if (!property.hidden) {\n      var category = properties[i].displayCategory;\n      if (category && typeof category === 'string' && category !== '') {\n        withCategories.push(property);\n      } else {\n        withoutCategories.push(property);\n      }\n    }\n  }\n\n  if (withCategories.length + withoutCategories.length === 0) {\n    this.showNoProperties();\n    return;\n  }\n\n  if (withoutCategories[0] && withoutCategories[0].displayName === 'Name') {\n    // The category-less 'Name' property is shown at the top\n    this.addProperty(withoutCategories[0].displayName, withoutCategories[0].displayValue);\n    withoutCategories.shift();\n  }\n\n  var avp = Autodesk.Viewing.Private;\n  var unitsPreference = this.viewer.prefs.get(avp.Prefs.DISPLAY_UNITS);\n  var precisionPreference = this.viewer.prefs.get(avp.Prefs.DISPLAY_UNITS_PRECISION);\n\n  for (var i = 0; i < withCategories.length; i++) {\n    var property = withCategories[i];\n    var precision = typeof precisionPreference === 'number' ? precisionPreference : property.precision || calculatePrecision(property.displayValue);\n    var display = convertToDisplayUnits(property.displayValue, property.type, property.units, unitsPreference);\n    var value = formatValueWithUnits(display.displayValue, display.displayUnits, property.type, precision);\n    this.addProperty(property.displayName, value, property.displayCategory);\n  }\n\n  var hasCategories = withCategories.length > 0;\n  for (var i = 0; i < withoutCategories.length; i++) {\n    var property = withoutCategories[i];\n    var precision = typeof precisionPreference === 'number' ? precisionPreference : property.precision || calculatePrecision(property.displayValue);\n    var display = convertToDisplayUnits(property.displayValue, property.type, property.units, unitsPreference);\n    var value = formatValueWithUnits(display.displayValue, display.displayUnits, property.type, precision);\n    this.addProperty(property.displayName, value, hasCategories ? 'Other' : '', hasCategories ? { localizeCategory: true } : {});\n  }\n};\n\n/**\n    * Displays only the \"No properties\" item.\n    */\nPropertyPanel.prototype.showNoProperties = function () {\n  this.removeAllProperties();\n  var rootContainer = this.tree.myRootContainer;\n\n  var _document = this.getDocument();\n  var message = _document.createElement('div');\n  message.className = 'no-properties';\n\n  var text = 'No properties to display'; // string localized below\n  message.setAttribute('data-i18n', text);\n  message.textContent = i18n.translate(text);\n\n  rootContainer.appendChild(message);\n};\n\n/**\n    * Override this to display the default properties.  The current default is to display no properties.\n    */\nPropertyPanel.prototype.showDefaultProperties = function () {\n  this.showNoProperties();\n\n  this.resizeToContent();\n};\n\n/**\n    * Override this to return true if the default properties are being displayed.\n    */\nPropertyPanel.prototype.areDefaultPropertiesShown = function () {\n  return !this.hasProperties();\n};\n\n/**\n    * Adds a property to this panel.  The property is defined by its name, value, and category.  The\n    * add will fail if a property with the same name, value, and category already exists.\n    *\n    * @param {string} name - The name of the property to add.\n    * @param {string} value - The value of the property to add.\n    * @param {string} category - The category of the property to add.\n    * @param {Object=} [options] - An optional dictionary of options.\n    * @param {boolean} [options.localizeCategory=false] - When true, localization is attempted for the given category\n    * @param {boolean} [options.localizeProperty=false] - When true, localization is attempted for the given property\n    * @returns {boolean} - true if the property was added, false otherwise.\n    */\nPropertyPanel.prototype.addProperty = function (name, value, category, options) {\n  var element = this.tree.getElementForNode({ name: name, value: value, category: category });\n  if (element) {\n    return false;\n  }\n\n  var parent = null;\n  var property = { name: name, value: value, type: 'property' };\n\n  if (category) {\n    parent = this.tree.getElementForNode({ name: category });\n    if (!parent) {\n      parent = this.tree.createElement_({ name: category, type: 'category' }, this.tree.myRootContainer, options && options.localizeCategory ? { localize: true } : null);\n    }\n    property.category = category;\n  } else {\n    parent = this.tree.myRootContainer;\n  }\n\n  this.tree.createElement_(property, parent, options && options.localizeProperty ? { localize: true } : null);\n\n  return true;\n};\n\n/**\n    * Returns whether this property panel currently has properties.\n    *\n    * @returns {boolean} - true if there are properties to display, false otherwise.\n    */\nPropertyPanel.prototype.hasProperties = function () {\n  for (var property in this.highlightableElements) {\n    return true;\n  }\n  return false;\n};\n\n/**\n    * Removes a property from this panel.  The property is defined by its name, value, and category.\n    *\n    * @param {string} name - The name of the property to remove.\n    * @param {string} value - The value of the property to remove.\n    * @param {string} category - The category of the property to remove.\n    * @param {Object=} [options] - An optional dictionary of options.  Currently unused.\n    * @returns {boolean} - true if the property was removed, false otherwise.\n    */\nPropertyPanel.prototype.removeProperty = function (name, value, category, options) {\n  var property = { name: name, value: value, category: category };\n  var element = this.tree.getElementForNode(property);\n  if (element) {\n    delete this.highlightableElements[this.tree.delegate().getTreeNodeId(property)];\n    element.parentNode.removeChild(element);\n    return true;\n  }\n  return false;\n};\n\n/**\n    * Removes all properties from the panel.\n    */\nPropertyPanel.prototype.removeAllProperties = function () {\n  this.highlightableElements = {};\n  this.tree.clear();\n};\n\n/**\n    * Sets the collapse state of the given category.\n    *\n    * @param {Object} category - A category object.\n    * @param {boolean} collapsed - The new collapse state.\n    */\nPropertyPanel.prototype.setCategoryCollapsed = function (category, collapsed) {\n  var id = this.tree.delegate().getTreeNodeId(category);\n  this.tree.setCollapsed(id, collapsed);\n};\n\n/**\n    * Returns whether the given category is currently collapsed.\n    *\n    * @param {Object} category - A category object.\n    * @returns {boolean} - true if the category is collapsed, false otherwise.\n    */\nPropertyPanel.prototype.isCategoryCollapsed = function (category) {\n  var id = this.tree.delegate().getTreeNodeId(category);\n  return this.tree.isCollapsed(id);\n};\n\n/**\n    * Returns the width and height to be used when resizing the panel to the content.\n    *\n    * @returns {{height: number, width: number}}\n    */\nPropertyPanel.prototype.getContentSize = function () {\n  // For the PropertyPanel, it's the size of the tree + some padding value for the height.\n  //\n  var treeContainer = this.tree.myRootContainer;\n  return { height: treeContainer.clientHeight + 55, width: treeContainer.clientWidth };\n};\n\n/**\n    * Highlights the given text if found in the property name or value.\n    *\n    * @param {string} text - The text to highlight.\n    * @param {Object=} [options] - An optional dictionary of options.  Currently unused.\n    */\nPropertyPanel.prototype.highlight = function (text, options) {\n  function highlightElement(element) {\n    var current = element.innerHTML;\n    var unhighlighted = current.replace(/(<highlight>|<\\/highlight>)/igm, \"\");\n    if (current !== unhighlighted) {\n      element.innerHTML = unhighlighted;\n    }\n\n    if (text && text !== \"\") {\n      var query = new RegExp(\"(\\\\b\" + text + \"\\\\b)\", \"gim\");\n      var highlighted = unhighlighted.replace(query, \"<highlight>$1</highlight>\");\n      element.innerHTML = highlighted;\n    }\n  }\n\n  for (var property in this.highlightableElements) {\n    var elements = this.highlightableElements[property];\n    for (var i = 0; i < elements.length; ++i) {\n      highlightElement(elements[i]);\n    }\n  }\n};\n\n/**\n    * Creates and adds the HTML elements to display the given category.\n    *\n    * @param {Object} category - A category object.\n    * @param {HTMLElement} parent - The parent to attach the new HTML elements.\n    * @param {Object=} [options] - An optional dictionary of options.\n    * @param {boolean} [options.localize=false] - When true, localization is attempted for the given category name.\n    *\n    * @returns {Array} elementList - the list of HTML elements to include when highlighting.\n    *                                Warning:  ensure no event listeners are attached to these elements\n    *                                as they will be lost during highlighting.\n    */\nPropertyPanel.prototype.displayCategory = function (category, parent, options) {\n  var _document = this.getDocument();\n  var name = _document.createElement('div');\n\n  var text = category.name;\n  if (options && options.localize) {\n    name.setAttribute('data-i18n', text);\n    text = i18n.translate(text);\n  }\n\n  name.textContent = text;\n  name.title = text;\n  name.className = 'category-name';\n  parent.appendChild(name);\n\n  // Make the category name highlightable.\n  //\n  return [name];\n};\n\nfunction replaceUrls(s) {\n  s = String(s); // Make sure we only get Strings here!\n  var t = ' target=\"blank\" class=\"propertyLink\" ';\n  var patternMap = [{\n    pattern: /\\b(?:https?|ftp):\\/\\/[a-z0-9-+&@#\\/%?=~_|!:,.;]*[a-z0-9-+&@#\\/%=~_|]/gim,\n    value: '<a' + t + 'href=\"$&\">$&</a>' },\n  {\n    pattern: /(^|[^\\/])(www\\.[\\S]+(\\b|$))/gim,\n    value: '$1<a' + t + 'href=\"http://$2\">$2</a>' }];\n\n  return patternMap.reduce(function (a, b) {\n    return a.replace(b.pattern, b.value);\n  }, s);\n}\n\n/**\n   * Creates and adds the HTML elements to display the given property.\n   *\n   * @param {Object} property - A property object.\n   * @param {HTMLElement} parent - The parent to attach the new HTML elements.\n   * @param {Object=} [options] - An optional dictionary of options.\n   * @param {boolean} [options.localize=false] - When true, localization is attempted for the given property name.\n   *\n   * @returns {Array} elementList - the list of HTML elements to include when highlighting.\n   *                                Warning:  ensure no event listeners are attached to these elements\n   *                                as they will be lost during highlighting.\n   */\nPropertyPanel.prototype.displayProperty = function (property, parent, options) {\n  var _document = this.getDocument();\n  var name = _document.createElement('div');\n\n  var text = property.name;\n  if (options && options.localize) {\n    name.setAttribute('data-i18n', text);\n    text = i18n.translate(text);\n  }\n\n  name.textContent = text;\n  name.title = text;\n  name.className = 'property-name';\n\n  var separator = _document.createElement('div');\n  separator.className = 'separator';\n\n  var value = _document.createElement('div');\n  value.textContent = property.value;\n\n  var s = property.value;\n  value.title = s;\n  s = replaceUrls(s);\n  value.innerHTML = s;\n\n  value.className = 'property-value';\n\n  parent.appendChild(name);\n  parent.appendChild(separator);\n  parent.appendChild(value);\n\n  // Make the property name and value highlightable.\n  //\n  return [name, value];\n};\n\n/**\n    * Override this to specify the CSS classes of a category. This way, in CSS, the designer\n    * can specify custom styling for specific category types.\n    *\n    * @param {Object} category\n    * @returns {string} - CSS classes for the category.\n    */\nPropertyPanel.prototype.getCategoryClass = function (category) {\n  return 'category';\n};\n\n/**\n    * Override this to specify the CSS classes of a property. This way, in CSS, the designer\n    * can specify custom styling for specific property types.\n    *\n    * @param {Object} property\n    * @returns {string} - CSS classes for the property.\n    */\nPropertyPanel.prototype.getPropertyClass = function (property) {\n  return 'property';\n};\n\n/**\n    * Override this method to do something when the user clicks on a category.  The default\n    * implementation is to toggle the collapse state of the category.\n    *\n    * @param {Object} category\n    * @param {Event} event\n    */\nPropertyPanel.prototype.onCategoryClick = function (category, event) {\n  this.setCategoryCollapsed(category, !this.isCategoryCollapsed(category));\n};\n\n/**\n    * Override this method to do something when the user clicks on a property.\n    *\n    * @param {Object} property\n    * @param {Event} event\n    */\nPropertyPanel.prototype.onPropertyClick = function (property, event) {\n};\n\n/**\n    * Override this method to do something when the user clicks on a category's icon.  The default\n    * implementation is to toggle the collapse state of the category.\n    *\n    * @param {Object} category\n    * @param {Event} event\n    */\nPropertyPanel.prototype.onCategoryIconClick = function (category, event) {\n  this.setCategoryCollapsed(category, !this.isCategoryCollapsed(category));\n};\n\n/**\n    * Override this method to do something when the user clicks on a property's icon.\n    *\n    * @param {Object} property\n    * @param {Event} event\n    */\nPropertyPanel.prototype.onPropertyIconClick = function (property, event) {\n};\n\n/**\n    * Override this method to do something when the user double clicks on a category.\n    *\n    * @param {Object} category\n    * @param {Event} event\n    */\nPropertyPanel.prototype.onCategoryDoubleClick = function (category, event) {\n};\n\n/**\n    * Override this method to do something when the user double clicks on a property.\n    *\n    * @param {Object} property\n    * @param {Event} event\n    */\nPropertyPanel.prototype.onPropertyDoubleClick = function (property, event) {\n};\n\n/**\n    * Override this method to do something when the user right clicks on a category.\n    *\n    * @param {Object} category\n    * @param {Event} event\n    */\nPropertyPanel.prototype.onCategoryRightClick = function (category, event) {\n};\n\n/**\n    * Override this method to do something when the user right clicks on a property.\n    *\n    * @param {Object} property\n    * @param {Event} event\n    */\nPropertyPanel.prototype.onPropertyRightClick = function (property, event) {\n};","\nimport { DockingPanel } from \"./DockingPanel\";\nimport * as et from \"../application/EventTypes\";\nimport { isIE11 } from \"../compat\";\nimport { OptionSlider, OptionCheckbox, OptionDropDown } from \"./CommonWidgets\";\nimport { LightPresets } from \"../application/LightPresets\";\n\n\n/** @constructor */\nexport function RenderOptionsPanel(viewer) {\n  var self = this;\n  this.viewer = viewer;\n  this.setGlobalManager(viewer.globalManager);\n\n  DockingPanel.call(this, viewer.container, 'RenderOptionsPanel', 'Rendering Options');\n\n  var _document = this.getDocument();\n  this.table = _document.createElement(\"table\");\n  this.table.className = \"adsk-lmv-tftable\";\n\n  this.tbody = _document.createElement(\"tbody\");\n  this.table.appendChild(this.tbody);\n\n  // Create the scroll container.  Adjust the height so the scroll container does not overlap\n  // the resize handle.  50px accounts for the titlebar and resize handle.\n  //\n  this.createScrollContainer({ heightAdjustment: 70 });\n\n  this.scrollContainer.appendChild(this.table);\n\n  this.container.style.width = \"320px\";\n  this.container.style.top = \"260px\";\n  this.container.style.left = \"220px\"; // just needs an initial value dock overrides value\n  this.container.style.height = \"460px\";\n  this.container.dockRight = true;\n\n  this.saoToggle = new OptionCheckbox(\"AO Enabled\", this.tbody, true);\n  this.saoToggle.setGlobalManager(this.globalManager);\n  this.addEventListener(this.saoToggle, \"change\", function (e) {\n    var enable = self.saoToggle.checked;\n    viewer.prefs.set(\"ambientShadows\", enable);\n    viewer.setQualityLevel(enable, viewer.impl.renderer().settings.antialias);\n  });\n\n  this.saoRadius = new OptionSlider(\"AO Radius\", 0, 200, this.tbody);\n  this.saoRadius.setGlobalManager(this.globalManager);\n  this.saoRadius.setValue(10);\n  this.saoRadius.sliderElement.step = this.saoRadius.stepperElement.step = 0.01;\n  this.addEventListener(this.saoRadius, \"change\", function (e) {\n    viewer.impl.renderer().setAOOptions(parseFloat(self.saoRadius.value), parseFloat(self.saoIntensity.value));\n    viewer.impl.renderer().composeFinalFrame();\n  });\n\n  this.saoIntensity = new OptionSlider(\"AO Intensity\", 0, 3, this.tbody);\n  this.saoIntensity.setGlobalManager(this.globalManager);\n  this.saoIntensity.setValue(0.4);\n  this.saoIntensity.sliderElement.step = this.saoIntensity.stepperElement.step = 0.01;\n  this.addEventListener(this.saoIntensity, \"change\", function (e) {\n    viewer.impl.renderer().setAOOptions(parseFloat(self.saoRadius.value), parseFloat(self.saoIntensity.value));\n    viewer.impl.renderer().composeFinalFrame();\n  });\n\n  this.groundShadowAlpha = new OptionSlider(\"Shadow Alpha\", 0, 2, this.tbody);\n  this.groundShadowAlpha.setGlobalManager(this.globalManager);\n  this.groundShadowAlpha.setValue(1.0);\n  this.groundShadowAlpha.sliderElement.step = this.groundShadowAlpha.stepperElement.step = 0.1;\n  this.addEventListener(this.groundShadowAlpha, \"change\", function (e) {\n    viewer.setGroundShadowAlpha(parseFloat(self.groundShadowAlpha.value));\n  });\n\n  this.groundShadowColor = new OptionCheckbox(\"Shadow Color\", this.tbody);\n  this.groundShadowColor.setGlobalManager(this.globalManager);\n  if (!isIE11) {\n    this.groundShadowColor.checkElement.value = \"#000000\"; // avoid warning\n    this.groundShadowColor.checkElement.type = \"color\"; // hack\n  }\n  this.addEventListener(this.groundShadowColor, \"change\", function (e) {\n    var colStr = self.groundShadowColor.checkElement.value;\n    viewer.setGroundShadowColor(\n    new THREE.Color(parseInt(colStr.substr(1, 7), 16)));\n\n  });\n\n  this.groundReflectionAlpha = new OptionSlider(\"Reflection Alpha\", 0, 2, this.tbody);\n  this.groundReflectionAlpha.setGlobalManager(this.globalManager);\n  this.groundReflectionAlpha.setValue(1.0);\n  this.groundReflectionAlpha.sliderElement.step = this.groundReflectionAlpha.stepperElement.step = 0.1;\n  this.addEventListener(this.groundReflectionAlpha, \"change\", function (e) {\n    viewer.setGroundReflectionAlpha(parseFloat(self.groundReflectionAlpha.value));\n  });\n\n  this.groundReflectionColor = new OptionCheckbox(\"Reflection Color\", this.tbody);\n  this.groundReflectionColor.setGlobalManager(this.globalManager);\n  if (!isIE11) {\n    this.groundReflectionColor.checkElement.value = \"#000000\"; // avoid warning\n    this.groundReflectionColor.checkElement.type = \"color\"; // hack\n  }\n  this.addEventListener(this.groundReflectionColor, \"change\", function (e) {\n    var colStr = self.groundReflectionColor.checkElement.value;\n    viewer.setGroundReflectionColor(\n    new THREE.Color(parseInt(colStr.substr(1, 7), 16)));\n\n  });\n\n  var env_list = [];\n  for (var i = 0; i < LightPresets.length; i++) {\n    env_list.push(LightPresets[i].name);\n  }\n\n  this.envSelect = new OptionDropDown(\"Environment\", this.tbody, env_list, viewer.impl.currentLightPreset());\n  this.envSelect.setGlobalManager(this.globalManager);\n\n  this.addEventListener(this.envSelect, \"change\", function (e) {\n    var chosen = self.envSelect.selectedIndex;\n    viewer.setLightPreset(chosen);\n  });\n\n\n  var initialTonemapMethod = viewer.impl.renderer().getToneMapMethod();\n\n  this.toneMapMethod = new OptionDropDown(\"Tonemap Method\", this.tbody,\n  [\"None\",\n  \"Canon-Lum\",\n  \"Canon-RGB\"],\n\n  initialTonemapMethod);\n  this.toneMapMethod.setGlobalManager(this.globalManager);\n\n  this.addEventListener(this.toneMapMethod, \"change\", function () {\n    // NOTE: Changing between Canon-Lum and Canon-RGB will yield no results\n    // TODO: Add mechanism to make a change in those values effective in the material.\n    // Best way to test this (for now) is to add an Environment with the desired toneMap value\n    var method = self.toneMapMethod.selectedIndex;\n    viewer.impl.setTonemapMethod(method);\n  });\n\n  this.exposureBias = new OptionSlider(\"Exposure Bias\", -30.0, 30.0, this.tbody);\n  this.exposureBias.setGlobalManager(this.globalManager);\n  this.exposureBias.setValue(viewer.impl.renderer().getExposureBias());\n  this.exposureBias.sliderElement.step = this.exposureBias.stepperElement.step = 0.1;\n  this.addEventListener(this.exposureBias, \"change\", function (e) {\n    viewer.impl.setTonemapExposureBias(self.exposureBias.value, self.whiteScale.value);\n  });\n  this.exposureBias.setDisabled(initialTonemapMethod == 0);\n\n  this.whiteScale = new OptionSlider(\"Light Intensity\", -5.0, 20.0, this.tbody);\n  this.whiteScale.setGlobalManager(this.globalManager);\n  var intensity = 0.0;\n  if (viewer.impl.dir_light1) {\n    if (viewer.impl.dir_light1.intensity != 0)\n    intensity = Math.log(viewer.impl.dir_light1.intensity) / Math.log(2.0);else\n\n    intensity = -1e-20;\n  }\n  this.whiteScale.setValue(intensity);\n  this.whiteScale.sliderElement.step = this.whiteScale.stepperElement.step = 0.1;\n  this.addEventListener(this.whiteScale, \"change\", function (e) {\n    viewer.impl.dir_light1.intensity = Math.pow(2.0, self.whiteScale.value);\n    viewer.impl.setTonemapExposureBias(self.exposureBias.value, self.whiteScale.value);\n  });\n\n  // 10-200mm lens range:\n  this.fovAngle = new OptionSlider(\"FOV-degrees\", 6.88, 100, this.tbody);\n  this.fovAngle.setGlobalManager(this.globalManager);\n  this.fovAngle.setValue(viewer.getFOV());\n  this.addEventListener(this.fovAngle, \"change\", function (e) {\n    viewer.setFOV(parseFloat(self.fovAngle.value));\n  });\n\n  // progressive update rate\n  this.frameRate = new OptionSlider(\"Frame rate:\", 1, 100, this.tbody);\n  this.frameRate.setGlobalManager(this.globalManager);\n  this.frameRate.setValue(viewer.impl.getFrameRate());\n  this.frameRate.sliderElement.step = this.frameRate.stepperElement.step = 1;\n  this.addEventListener(this.frameRate, \"change\", function (e) {\n    viewer.impl.setFrameRate(self.frameRate.value);\n  });\n\n  this.addEventListener(this.viewer, et.CAMERA_CHANGE_EVENT, function (evt) {\n    var myFov = parseFloat(self.fovAngle.value);\n    var camFov = viewer.getFOV();\n\n    if (myFov != camFov)\n    self.fovAngle.setValue(camFov);\n  });\n\n  this.addEventListener(this.viewer, et.RENDER_OPTION_CHANGED_EVENT, function (e) {\n    self.syncUI();\n  });\n\n\n  this.addEventListener(this.viewer, et.VIEWER_STATE_RESTORED_EVENT, function (event) {\n    self.syncUI();\n  });\n\n  this.addVisibilityListener(function (show) {\n    show && self.resizeToContent();\n  });\n};\n\nRenderOptionsPanel.prototype = Object.create(DockingPanel.prototype);\nRenderOptionsPanel.prototype.constructor = RenderOptionsPanel;\n\n/**\n                                                                * Returns the width and height to be used when resizing the panel to the content.\n                                                                *\n                                                                * @returns {{height: number, width: number}}\n                                                                */\nRenderOptionsPanel.prototype.getContentSize = function () {\n  return { height: this.table.clientHeight + 75, width: this.table.clientWidth };\n};\n\nRenderOptionsPanel.prototype.syncUI = function () {\n  var impl = this.viewer.impl;\n\n  var intensity = 0.0;\n  if (impl.dir_light1) {\n    if (impl.dir_light1.intensity != 0)\n    intensity = Math.log(impl.dir_light1.intensity) / Math.log(2.0);else\n\n    intensity = -1e-20;\n  }\n  this.whiteScale.setValue(intensity);\n\n  this.exposureBias.setValue(impl.renderer().getExposureBias());\n\n  var method = impl.renderer().getToneMapMethod();\n  this.toneMapMethod.setSelectedIndex(method);\n  this.envSelect.setSelectedIndex(impl.currentLightPreset());\n\n  this.exposureBias.setDisabled(method == 0);\n  this.saoToggle.setValue(impl.renderer().getAOEnabled());\n  this.saoRadius.setDisabled(!impl.renderer().getAOEnabled());\n  this.saoIntensity.setDisabled(!impl.renderer().getAOEnabled());\n\n  this.saoRadius.setValue(impl.renderer().getAORadius());\n  this.saoIntensity.setValue(impl.renderer().getAOIntensity());\n\n  // NOTE_NOP: no sync value because no get methods, not necessary to implement\n  this.groundShadowAlpha.setDisabled(!this.viewer.prefs.get(\"groundShadow\"));\n  this.groundShadowColor.setDisabled(!this.viewer.prefs.get(\"groundShadow\"));\n  this.groundReflectionAlpha.setDisabled(!this.viewer.prefs.get(\"groundReflection\"));\n  this.groundReflectionColor.setDisabled(!this.viewer.prefs.get(\"groundReflection\"));\n\n  this.fovAngle.setValue(this.viewer.getFOV());\n};\n\nRenderOptionsPanel.prototype.uninitialize = function () {\n  DockingPanel.prototype.uninitialize.call(this);\n\n  this.table = null;\n  this.tbody = null;\n  this.saoToggle = null;\n  this.saoRadius = null;\n  this.saoIntensity = null;\n  this.groundShadowAlpha = null;\n  this.envSelect = null;\n  this.toneMapMethod = null;\n  this.exposureBias = null;\n  this.whiteScale = null;\n  this.fovAngle = null;\n  this.viewer = null;\n};","// extracted by mini-css-extract-plugin","function _typeof(obj) {\"@babel/helpers - typeof\";if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {_typeof = function _typeof(obj) {return typeof obj;};} else {_typeof = function _typeof(obj) {return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;};}return _typeof(obj);}\n\nimport { DockingPanel } from \"./DockingPanel\";\nimport { i18n } from \"../globalization/i18next\";\nimport { touchStartToClick } from \"../compat\";\nimport { OptionCheckbox, OptionSlider, OptionDropDown, OptionLabel, OptionButton, OptionRow, SimpleList } from \"./CommonWidgets\";\nimport { Button } from './controls/Button';\n\n\nvar TAB_BAR_HEIGHT = 40; //px\n\n\n/**\n * UI panel specifically designed for application settings.\n *\n * The user can add new options to each of the tabs.\n * @augments Autodesk.Viewing.UI.DockingPanel\n * @param {HTMLElement} parentContainer - The container for this panel.\n * @param {string} id - The id to assign this panel.\n * @param {string} title - The title of this panel.\n * @param {object} [options] - An optional dictionary of options.\n * @param {number} [options.width] - Override panel's minimum width\n * @param {number} [options.heightAdjustment] - Override panel's extra content height, to account for non-scrolling elements.\n * @constructor\n * @alias Autodesk.Viewing.UI.SettingsPanel\n */\nexport function SettingsPanel(parentContainer, id, title, options) {\n\n\n  DockingPanel.call(this, parentContainer, id, title, options);\n\n  this.panelTabs = [];\n  this.tabIdToIndex = {};\n  this.controls = {};\n  this.controlIdCount = 0; // to generate unique ids for controls.\n  this.shown = false;\n\n  var settings = this;\n\n  var minWidth = options && options.width !== undefined ? options.width : 340;\n\n  this.container.style.maxWidth = \"800px\";\n  this.container.style.minWidth = minWidth + \"px\";\n  this.container.style.top = \"10px\";\n  this.container.style.left = parentContainer.offsetWidth / 2 - 170 + \"px\"; //center it horizontally\n  this.container.style.position = \"absolute\";\n\n  var _document = this.getDocument();\n  this.tabContainer = _document.createElement(\"div\");\n  this.tabContainer.classList.add(\"docking-panel-container-solid-color-b\");\n  this.tabContainer.classList.add(\"settings-tabs\");\n  this.tabContainer.classList.add(\"docking-panel-delimiter-shadow\");\n  this.container.appendChild(this.tabContainer);\n\n  this.tabs = _document.createElement(\"ul\");\n  this.tabContainer.appendChild(this.tabs);\n\n  this.heightAdjustment = options && options.heightAdjustment ? options.heightAdjustment : 179;\n  if (options && options.hideTabBar) {\n    this.heightAdjustment -= TAB_BAR_HEIGHT;\n    this.tabContainer.style.display = 'none';\n    this.tabContainer.style.height = 0;\n  }\n  this.createScrollContainer({ left: false, heightAdjustment: this.heightAdjustment, marginTop: 0 });\n\n  this.tablesContainer = _document.createElement(\"div\");\n  this.tablesContainer.classList.add(\"settings-tabs-tables-container\");\n\n  if (options && options.hideTabBar) {\n    this.scrollContainer.style.top = 90 - TAB_BAR_HEIGHT + 'px';\n  }\n  this.scrollContainer.appendChild(this.tablesContainer);\n\n  // Add hovering effect.\n  //\n  this.mouseOver = false;\n  this.addEventListener(this.container, \"mouseover\", function (event) {\n    // This is the original element the event handler was assigned to\n    var e = event.toElement || event.relatedTarget;\n    if (settings.mouseOver)\n    return true;\n\n    // Check for all children levels (checking from bottom up)\n    var index = 0;\n    var _window = settings.getWindow();\n    while (e && e.parentNode && e.parentNode != _window) {\n      if (e.parentNode == this || e == this) {\n        if (e.preventDefault) e.preventDefault();\n        settings.mouseOver = true;\n\n        for (var index = 0; index < settings.panelTabs.length; index++) {\n          settings.panelTabs[index].classList.remove(\"selectedmouseout\");}\n        return true;\n      }\n      e = e.parentNode;\n    }\n  });\n\n  this.addEventListener(this.container, \"mouseout\", function (event) {\n    // This is the original element the event handler was assigned to\n    var e = event.toElement || event.relatedTarget;\n    if (!settings.mouseOver)\n    return;\n\n    var _window = settings.getWindow();\n    // Check for all children levels (checking from bottom up)\n    while (e && e.parentNode && e.parentNode != _window) {\n      if (e.parentNode == this || e == this) {\n        if (e.preventDefault) e.preventDefault();\n        return false;\n      }\n      e = e.parentNode;\n    }\n    settings.mouseOver = false;\n\n    var selectedTab = null;\n    for (var index = 0; index < settings.panelTabs.length; index++) {\n      if (settings.panelTabs[index].classList.contains(\"tabselected\"))\n      settings.panelTabs[index].classList.add(\"selectedmouseout\");\n    }\n  });\n\n  this.expandID = function (controlID) {return id + '-' + controlID;};\n}\n\nSettingsPanel.prototype = Object.create(DockingPanel.prototype);\nSettingsPanel.prototype.constructor = SettingsPanel;\n\n/**\n                                                      * Sets the new visibility state of this SettingsPanel.\n                                                      *\n                                                      * @param {boolean} show - The desired visibility state.\n                                                      *\n                                                      * @alias Autodesk.Viewing.UI.SettingsPanel#setVisible\n                                                      */\nSettingsPanel.prototype.setVisible = function (show)\n{\n  if (show) {\n    // Since the container does not have width and when display set to none\n    // getBoundingClientRect() returns 0, set the display to block before the\n    // parent calculates the position and the panel.\n    // NOTE: Setting the width for the container does not work here.\n    this.container.style.display = \"block\";\n    if (!this.shown) {\n      this.resizeToContent();\n      this.container.style.left = this.parentContainer.offsetWidth / 2 - this.container.getBoundingClientRect().width / 2 + \"px\"; //center it horizontally\n    }\n    this.shown = true;\n  }\n\n  DockingPanel.prototype.setVisible.call(this, show);\n};\n\n/**\n    * Adds a new tab to the panel.\n    *\n    * @param {string} tabId - id for the tab (DOM element will have an extended ID to ensure uniqueness).\n    * @param {string} tabTitle\n    * @param {object} [options] - optional parameter that allows for additional options for the tab:\n    * - tabClassName - class name for the Dom elements\n    * - minWidth - min width for the tab\n    * - index - index if the tab should be inserted instead of added at the end.\n    * @returns {boolean} True if the tab was added to the panel, false otherwise.\n    *\n    * @alias Autodesk.Viewing.UI.SettingsPanel#addTab\n    */\nSettingsPanel.prototype.addTab = function (tabId, tabTitle, options) {\n  var settings = this;\n\n  if (this.tabIdToIndex[tabId] !== undefined)\n  return false;\n\n  var tabDomClass = options && options.className !== undefined ? options.className : null;\n  var minWidth = options && options.width !== undefined ? options.width : 200;\n  var tabIndex = options && options.index !== undefined ? options.index : this.panelTabs.length;\n\n  function select(e) {\n    settings.selectTab(tabId);\n  }\n\n  var _document = this.getDocument();\n  var tab = _document.createElement(\"li\");\n  tab._id = tabId; // local ID\n  tab.id = this.expandID(tab._id); // DOM ID\n  tab.classList.add(tabDomClass);\n\n  var title = _document.createElement(\"a\");\n  var span = _document.createElement(\"span\");\n  span.setAttribute(\"data-i18n\", tabTitle);\n  span.textContent = i18n.translate(tabTitle);\n  title.appendChild(span);\n  tab.appendChild(title);\n\n  this.tabs.appendChild(tab);\n\n  var table = _document.createElement(\"table\");\n  table._id = tabId + \"-table\"; // local ID\n  table.id = this.expandID(table._id); // DOM ID\n  table.classList.add(\"settings-table\");\n  table.classList.add(\"adsk-lmv-tftable\");\n  table.classList.add(tabDomClass);\n\n  var tbody = _document.createElement(\"tbody\");\n  tbody.style.display = 'table';\n  tbody.style.width = '100%';\n  table.appendChild(tbody);\n\n  this.tablesContainer.appendChild(table);\n\n  this.addEventListener(tab, \"touchstart\", touchStartToClick);\n  this.addEventListener(tab, \"click\", select);\n\n  this.panelTabs.push(tab);\n  this.tabIdToIndex[tabId] = tabIndex;\n\n  // Adjust the panel's minWidth.\n  var currentMinWidth = this.container.style.minWidth ? parseInt(this.container.style.minWidth) : 0;\n  if (minWidth > currentMinWidth)\n  this.container.style.minWidth = minWidth + \"px\";\n\n  return true;\n};\n\n/**\n    * Removes the given tab from the panel.\n    *\n    * @param {string} tabId - Tab to remove.\n    * @return {boolean} True if the tab was successfully removed, false otherwise.\n    *\n    * @alias Autodesk.Viewing.UI.SettingsPanel#removeTab\n    */\nSettingsPanel.prototype.removeTab = function (tabId) {\n\n  var tabIndex = this.tabIdToIndex[tabId];\n  if (!tabIndex)\n  return false;\n\n  this.panelTabs.splice(tabIndex, 1);\n\n  var _document = this.getDocument();\n  var tabDom = _document.getElementById(this.expandID(tabId));\n  this.tabs.removeChild(tabDom);\n\n  // Adjust the idToIndex table and add space (right margin) to all tabs except the last one.\n  this.tabIdToIndex = {};\n  var tabCount = this.panelTabs.length;\n  for (var index = 0; index < tabCount; index++) {\n    var tab = this.panelTabs[index];\n    this.tabIdToIndex[tab._id] = index;\n\n    // Remove the event listeners for these tabs\n    this.removeEventListener(tab, 'touchstart', touchStartToClick);\n  }\n  return true;\n};\n\n/**\n    * Resize the tabs, so all tabs have the same width\n    * @private\n   */\nSettingsPanel.prototype.resizeTabs = function () {\n  var tab_list = this.tabs.getElementsByTagName(\"li\");\n  var tab_width = 100 / tab_list.length;\n  for (var i = 0; i < tab_list.length; i++) {\n    tab_list[i].style.width = tab_width + \"%\";\n  }\n};\n\n/**\n    * Returns true if a tab with given id exists.\n    *\n    * @param {string} tabId - Tab id.\n    * @returns {boolean} True if the tab with given id exists, false otherwise.\n    *\n    * @alias Autodesk.Viewing.UI.SettingsPanel#hasTab\n    */\nSettingsPanel.prototype.hasTab = function (tabId) {\n  var tabIndex = this.tabIdToIndex[tabId];\n  var tab = this.panelTabs[tabIndex];\n  return tab !== undefined;\n};\n\n/**\n    * Makes a given tab visible and hides the other ones.\n    *\n    * @param {string} tabId - Tab to select.\n    * @returns {boolean} True if the tab was selected, false otherwise.\n    *\n    *\n    * @alias Autodesk.Viewing.UI.SettingsPanel#selectTab\n    */\nSettingsPanel.prototype.selectTab = function (tabId)\n{\n  if (this.isTabSelected(tabId))\n  return false;\n\n  var _document = this.getDocument();\n  var tabCount = this.panelTabs.length;\n  for (var tabIndex = 0; tabIndex < tabCount; tabIndex++) {\n    var tab = this.panelTabs[tabIndex];\n    var table = _document.getElementById(this.expandID(tab._id + \"-table\"));\n    if (tabId === tab._id) {\n      tab.classList.add(\"tabselected\");\n      table.classList.add('settings-selected-table');\n      if (!this.mouseOver) {\n        tab.classList.add(\"selectedmouseout\");\n      }\n    } else\n    {\n      tab.classList.remove(\"tabselected\");\n      table.classList.remove('settings-selected-table');\n      if (!this.mouseOver) {\n        this.panelTabs[tabIndex].classList.remove(\"selectedmouseout\");\n      }\n    }\n  }\n\n  this.scrollContainer.scrollTop = 0;\n  return true;\n};\n\n/**\n    * Returns true if the given tab is selected (visible).\n    *\n    * @param {string} tabId - Tab to check.\n    * @returns {boolean} True if the tab is selected, false otherwise.\n    *\n    * @alias Autodesk.Viewing.UI.SettingsPanel#isTabSelected\n    */\nSettingsPanel.prototype.isTabSelected = function (tabId) {\n  var tabIndex = this.tabIdToIndex[tabId];\n  var tab = this.panelTabs[tabIndex];\n  return tab && tab.classList.contains('tabselected');\n};\n\n\n/**\n    * Gets the id of the selected tab.\n    *\n    * @returns {string|null} id of the selected tab, or null if none selected. \n    */\nSettingsPanel.prototype.getSelectedTabId = function () {\n  for (var tabId in this.tabIdToIndex) {\n    if (this.isTabSelected(tabId)) {\n      return tabId;\n    }\n  }\n  return null;\n};\n\n/**\n    * Adds a label to the panel.\n    * @param {string} tabId - Id of the tab that will contain the button.\n    * @param {string} name - User facing text.\n    * @returns {object} the label control\n    *\n    * @alias Autodesk.Viewing.UI.SettingsPanel#addLabel\n    */\nSettingsPanel.prototype.addLabel = function (tabId, name) {\n  var table;\n  var index = this.tabIdToIndex[tabId];\n  if (index === -1) {\n    return false;\n  }\n  table = this.tablesContainer.childNodes[index];\n  var settingsLabel = new OptionLabel(name, table.tBodies[0]);\n  settingsLabel.setGlobalManager(this.globalManager);\n  settingsLabel.sliderRow.classList.add('logical-group');\n  return settingsLabel;\n};\n\n/**\n    * Adds a button to the panel.\n    * @param {string} tabId - Id of the tab that will contain the button.\n    * @param {string} label - User facing text.\n    * @returns {string} ID of a new control.\n    *\n    * @alias Autodesk.Viewing.UI.SettingsPanel#addButton\n    */\nSettingsPanel.prototype.addButton = function (tabId, label) {\n\n  var index = this.tabIdToIndex[tabId];\n  if (index === undefined)\n  return null;\n\n  var table = this.tablesContainer.childNodes[index];\n  var btn = new OptionButton(label, table.tBodies[0]);\n  btn.setGlobalManager(this.globalManager);\n\n  return this.addControl(tabId, btn);\n};\n\n/**\n    * Creates a checkbox control and adds it to a given tab.\n    *\n    * @param {string} tabId - Tab to which to add a new checkbox.\n    * @param {string} caption - The text associated with the checkbox.\n    * @param {boolean} initialState - Initial value for the checkbox (checked or not).\n    * @param {function} onchange - Callback that is called when the checkbox is changed.\n    * @param {object|undefined} options - Additional options:\n    * - insertAtIndex - index at which to insert a new checkbox\n    * @returns {string} ID of a new control.\n    *\n    * @alias Autodesk.Viewing.UI.SettingsPanel#addCheckbox\n    */\nSettingsPanel.prototype.addCheckbox = function (tabId, caption, initialState, onchange, description, options)\n{\n  var tabIndex = this.tabIdToIndex[tabId];\n  if (tabIndex === undefined)\n  return null;\n\n  var _document = this.getDocument();\n  var table = _document.getElementById(this.expandID(tabId + \"-table\"));\n  var checkBoxElem = new OptionCheckbox(caption, table.tBodies[0], initialState, description, options);\n  checkBoxElem.setGlobalManager(this.globalManager);\n  checkBoxElem.changeListener = function (e) {\n    var checked = e.detail.target.checked;\n    onchange(checked);\n  };\n  this.addEventListener(checkBoxElem, \"change\", checkBoxElem.changeListener);\n\n  return this.addControl(tabId, checkBoxElem);\n};\n\n/**\n    * Creates a row control and adds it to a given tab.\n    * A row only contains a caption and a descriptions\n    *\n    * @param {string} tabId - Tab to which to add a new row.\n    * @param {string} caption - The text associated with the row.\n    * @param {string} description - Description\n    * @param {object|undefined} options - Additional options:\n    * - insertAtIndex - index at which to insert a new row\n    * @returns {string} ID of a new control.\n    *\n    * @alias Autodesk.Viewing.UI.SettingsPanel#addRow\n    */\nSettingsPanel.prototype.addRow = function (tabId, caption, description, options) {\n\n  var tabIndex = this.tabIdToIndex[tabId];\n  if (tabIndex === undefined)\n  return null;\n\n  var _document = this.getDocument();\n  var table = _document.getElementById(this.expandID(tabId + \"-table\"));\n\n  var rowElem = new OptionRow(caption, table.tBodies[0], description, options);\n  rowElem.setGlobalManager(this.globalManager);\n\n  return this.addControl(tabId, rowElem);\n};\n\n/**\n    * Creates a slider control and adds it to a given tab.\n    *\n    * @param {string} tabId - Tab to which to add a new slider.\n    * @param {string} caption - The text associated with the slider\n    * @param {number} min - Min value of the slider.\n    * @param {number} max - Max value of the slider.\n    * @param {number} initialValue - Initial value for the slider.\n    * @param {function} onchange - Callback that is called when the slider value is changed.\n    * @param {object|undefined} options - Additional options:\n    * - insertAtIndex - index at which to insert a new slider\n    * @returns {string} ID of a new control.\n    *\n    * @alias Autodesk.Viewing.UI.SettingsPanel#addSlider\n    */\nSettingsPanel.prototype.addSlider = function (tabId, caption, min, max, initialValue, onchange, options)\n{\n  var tabIndex = this.tabIdToIndex[tabId];\n  if (tabIndex === undefined)\n  return null;\n\n  var _document = this.getDocument();\n  var table = _document.getElementById(this.expandID(tabId + \"-table\"));\n  var slider = new OptionSlider(caption, min, max, table.tBodies[0], options);\n  slider.setGlobalManager(this.globalManager);\n  slider.setValue(initialValue);\n  var _step = 1;\n  if (options && options.step) {\n    _step = options.step;\n  }\n  slider.sliderElement.step = slider.stepperElement.step = _step;\n  this.addEventListener(slider, \"change\", function (e) {\n    onchange(e);\n  });\n\n  return this.addControl(tabId, slider);\n};\n\n\n\n/**\n    * Creates a row control and a slider control and adds it to a given tab.\n    * The slider does not contain the caption or the stepper.\n    * \n    * @see Autodesk.Viewing.UI.SettingsPanel#addRow\n    * @see Autodesk.Viewing.UI.SettingsPanel#addSlider\n    * \n    * @param {string} tabId - Tab to which to add a new slider.\n    * @param {string} caption - The text associated with the slider\n    * @param {string} description - The description for the slider\n    * @param {number} min - Min value of the slider.\n    * @param {number} max - Max value of the slider.\n    * @param {number} initialValue - Initial value for the slider.\n    * @param {function} onchange - Callback that is called when the slider value is changed.\n    * @param {object|undefined} options - Additional options:\n    * - insertAtIndex - index at which to insert a new slider\n    * @returns {string[]} - an array of control ids\n    *\n    *  @alias Autodesk.Viewing.UI.SettingsPanel#addSliderV2\n    */\nSettingsPanel.prototype.addSliderV2 = function (tabId, caption, description, min, max, initialValue, onchange, options) {\n  options = !options ? {} : options;\n  // We will always hide the caption and the stepper for this version of the slider.\n  options.hideStepper = true;\n  options.hideCaption = true;\n  var controlIds = [];\n  controlIds.push(this.addRow(tabId, caption, description, options));\n  controlIds.push(this.addSlider(tabId, caption, min, max, initialValue, onchange, options));\n  return controlIds;\n};\n\n/**\n    * @param {string} tabId - Tab to which to add a new slider.\n    * @param {string} caption - The text associated with the slider.\n    * @param {array} items - List of items for the menu.\n    * @param {number} initialItemIndex - Initial choice.\n    * @param {function} onchange - Callback that is called when the menu selection is changed.\n    * @param {object|undefined} options - Additional options:\n    * - insertAtIndex - index at which to insert a new drop down menu\n    * @returns {string} ID of a new control.\n    *\n    * @alias Autodesk.Viewing.UI.SettingsPanel#addRopDownMenu\n    */\nSettingsPanel.prototype.addDropDownMenu = function (tabId, caption, items, initialItemIndex, onchange, options)\n{\n  var tabIndex = this.tabIdToIndex[tabId];\n  if (tabIndex === undefined)\n  return null;\n\n  var _document = this.getDocument();\n  var table = _document.getElementById(this.expandID(tabId + \"-table\"));\n\n  var menu = new OptionDropDown(caption, table.tBodies[0], items, initialItemIndex, null, this.globalManager, options);\n  menu.setGlobalManager(this.globalManager);\n\n  this.addEventListener(menu, \"change\", function (e) {\n    onchange(e);\n  });\n\n  return this.addControl(tabId, menu);\n};\n\n/**\n    * Adds a new control to a given tab.\n    *\n    * @param {string} tabId - Tab to which to add a new.\n    * @param {object|HTMLElement} control - Control to add to the given tab.\n    * @param {object|undefined} options - Additional parameters:\n    * - insertAtIndex - index at which to insert a new control\n    * - caption - caption for the control\n    * @returns {string} ID of the added control.\n    *\n    * @alias Autodesk.Viewing.UI.SettingsPanel#addControl\n    */\nSettingsPanel.prototype.addControl = function (tabId, control, options)\n{\n  var tabIndex = this.tabIdToIndex[tabId];\n  if (tabIndex === undefined)\n  return null;\n\n  // If this is a generic control (not created by one of the convenient methods\n  // like addCheckbox, addSlider, etc. then add it to the table first.\n  //\n  if (!control.hasOwnProperty(\"sliderRow\")) {\n    var atIndex = options && options.insertAtIndex ? options.insertAtIndex : -1;\n    var caption = options && options.caption ? options.caption : null;\n\n    var _document = this.getDocument();\n    var table = _document.getElementById(this.expandID(tabId + \"-table\"));\n    if (atIndex > table.length)\n    atIndex = -1; // add it to the end.\n    var sliderRow = table.tBodies[0].insertRow(atIndex);\n\n    var cell = sliderRow.insertCell(0);\n    if (caption) {\n      var domCaption = _document.createElement(\"div\");\n      domCaption.setAttribute(\"data-i18n\", caption);\n      domCaption.textContent = i18n.translate(caption);\n      cell.appendChild(domCaption);\n      cell = sliderRow.insertCell(1);\n    } else\n    {\n      // Span the cell into 3 columns\n      cell.colSpan = 3;\n    }\n    cell.appendChild(control);\n\n    control.sliderRow = sliderRow;\n    control.tbody = table.tBodies[0];\n  }\n\n  var controlId = this.expandID(\"adsk_settings_control_id_\" + this.controlIdCount.toString());\n  this.controlIdCount = this.controlIdCount + 1;\n  this.controls[controlId] = control;\n\n  control.parent = this;\n\n  return controlId;\n};\n\n/**\n    * Removes a given button from the settings panel.\n    *\n    * @param {string|Autodesk.Viewing.UI.Control} buttonId - button, or button id, to remove.\n    * @returns {boolean} True if the button was removed, false otherwise.\n    *\n    * @alias Autodesk.Viewing.UI.SettingsPanel#removeButton\n    */\nSettingsPanel.prototype.removeButton = function (buttonId)\n{\n  return this.removeControl(buttonId);\n};\n\n/**\n    * Removes a given checkbox from the settings panel.\n    *\n    * @param {string|Autodesk.Viewing.UI.Control} checkboxId - Checkbox to remove.\n    * @returns {boolean} True if the checkbox was removed, false otherwise.\n    *\n    * @alias Autodesk.Viewing.UI.SettingsPanel#removeCheckbox\n    */\nSettingsPanel.prototype.removeCheckbox = function (checkboxId)\n{\n  return this.removeControl(checkboxId);\n};\n\n/**\n    * Removes a given slider from the settings panel.\n    *\n    * @param {string|Autodesk.Viewing.UI.Control} sliderId - Slider control to remove.\n    * @returns {boolean} True if the slider control was removed, false otherwise.\n    *\n    * @alias Autodesk.Viewing.UI.SettingsPanel#removeSlider\n    */\nSettingsPanel.prototype.removeSlider = function (sliderId)\n{\n  return this.removeControl(sliderId);\n};\n\n/**\n    * Removes a given dropdown menu from the settings panel.\n    *\n    * @param {string|Autodesk.Viewing.UI.Control} dropdownMenuId - Dropdown to remove.\n    * @returns {boolean} true if the dropdown was removed, false if the dropdown was not removed.\n    *\n    * @alias Autodesk.Viewing.UI.SettingsPanel#removeDropdownMenu\n    */\nSettingsPanel.prototype.removeDropdownMenu = function (dropdownMenuId)\n{\n  return this.removeControl(dropdownMenuId);\n};\n\n/**\n    * Removes a given control from the settings panel.\n    *\n    * @param {string|Autodesk.Viewing.UI.Control} controlId - The control ID or control instance to remove.\n    * @returns {boolean} true if the control was removed, false if the control was not removed.\n    *\n    * @alias Autodesk.Viewing.UI.SettingsPanel#removeControl\n    */\nSettingsPanel.prototype.removeControl = function (controlId)\n{\n  var control;\n  if (_typeof(controlId) === \"object\" && controlId.tbody) {\n    control = controlId;\n    for (var c in this.controls) {\n      if (this.controls[c] === control) {\n        controlId = c;\n        break;\n      }\n    }\n  } else {\n    control = this.controls[controlId];\n  }\n\n  if (control === undefined)\n  return false;\n\n  // New way is to call a method. \n  if (control.removeFromParent) {\n    control.removeFromParent();\n  } else {\n    var tbody = control.tbody;\n    var sliderRow = control.sliderRow;\n    var rowIndex = sliderRow.rowIndex;\n    tbody.deleteRow(rowIndex);\n  }\n\n  delete this.controls[controlId];\n\n  control.parent = undefined;\n\n  return true;\n};\n\n/**\n    * Returns a control with a given id.\n    *\n    * @param {string} controlId - Checkbox id to return.\n    * @returns {object} Control object if found, null otherwise.\n    *\n    * @alias Autodesk.Viewing.UI.SettingsPanel#getControl\n    */\nSettingsPanel.prototype.getControl = function (controlId)\n{\n  return this.controls[controlId] || null;\n};\n\n/**\n    * Returns the width and height to be used when resizing the panel to the content.\n    *\n    * @returns {object} `{height: number, width: number}`.\n    *\n    * @alias Autodesk.Viewing.UI.SettingsPanel#getContentSize\n    */\nSettingsPanel.prototype.getContentSize = function () {\n\n  var height = this.heightAdjustment;\n\n  // If none of the tabs is selected, then take the fist one (case when\n  // there is only one tab).\n  var tabHeight = 0;\n  var _document = this.getDocument();\n  for (var tabIndex = 0; tabIndex < this.panelTabs.length; tabIndex++) {\n    var tab = this.panelTabs[tabIndex];\n    var table = _document.getElementById(this.expandID(tab._id + \"-table\")); // TODO: cache elements instead of fetching them from dom.\n    var tableHeight = table ? table.clientHeight : 0;\n    tabHeight = Math.max(tabHeight, tableHeight);\n  }\n\n  return {\n    height: height + tabHeight,\n    width: this.container.clientWidth };\n\n};\n\n/**\n    * Resizes panel vertically to wrap around the content.\n    * It will always leave some room at the bottom to display the toolbar.\n    * @param {HTMLElement} container - parent container of settings panel \n    *\n    * @alias Autodesk.Viewing.UI.SettingsPanel#sizeToContent\n    */\nSettingsPanel.prototype.sizeToContent = function (container) {\n  var csize = this.getContentSize();\n  var cHeight = csize.height + this.heightAdjustment;\n  var maxHeight = container.clientHeight - this.heightAdjustment;\n  var minSize = Math.min(cHeight, maxHeight);\n  this.container.style.height = parseInt(minSize) + 'px';\n};\n\n/**\n    * Adds a vertical list UI to the panel.\n    *\n    * @param {HTMLElement} parentDiv - html element that will contain the list.\n    * @param {function} renderListItem - Callback for rendering list elements with arguments: domElem:HTMLElement, uiItem:Object, options:Object.\n    * @param {function} onClick - callback that gets called when clicking on a grid element. Receives the index that is clicked.\n    *\n    * @returns {SimpleList}\n    *\n    * @private\n    */\nSettingsPanel.prototype.addSimpleList = function (parentDiv, renderListItem, onClick) {\n\n  var simpleList = new SimpleList(parentDiv, renderListItem, onClick);\n  simpleList.setGlobalManager(this.globalManager);\n  return simpleList;\n};\n\n/**\n    * Removes a the basic table grid from the supplied parentTable\n    * @param {HTMLTableElement} parentTable - parent html table element\n    * @returns {boolean} - true if the grid was removed or if there is no grid in the parentTable.\n    * @private\n    */\nSettingsPanel.prototype.removeSimpleList = function (simpleList) {\n  if (simpleList) {\n    simpleList.removeFromParent();\n    return true;\n  }\n  return false;\n};","// extracted by mini-css-extract-plugin","\nimport { isTouchDevice, isIE11 } from \"../compat\";\nimport { GestureRecognizers } from \"../tools/GestureHandler\";\nimport { GlobalManagerMixin } from '../application/GlobalManagerMixin';\n\nvar Hammer = require('../../thirdparty/hammer/hammer.js');\n\n\n/**\n                                                            * Tree view control\n                                                            * \n                                                            * @constructor\n                                                            * @param {TreeDelegate} delegate\n                                                            * @param {Object} root - A node in the model Document\n                                                            * @param {HTMLElement|string} parentContainer - Or parentContainerId\n                                                            * @param {Object} options\n                                                            * @alias Autodesk.Viewing.UI.Tree\n                                                            */\nexport function Tree(delegate, root, parentContainer, options) {\n  this.myDelegate = delegate;\n  this.mySelectedNodes = [];\n  this.myOptions = options || {};\n  this.parentContainer = parentContainer;\n\n  var className = 'treeview';\n\n  this.groupClassName = this.myOptions.groupClassName || 'expanded';\n  this.leafClassName = this.myOptions.leafClassName || 'expanded';\n  this.selectedClassName = this.myOptions.selectedClassName || 'selected';\n\n  this.myGroupNodes = []; // <group> HTML elements in the tree\n\n  this.nodeToElement = {};\n  this.nodeIdToNode = {};\n\n  var rootContainer = this.myRootContainer = this.createHtmlElement_(parentContainer, 'div', className);\n\n  var rootElem = this.rootElem = this.createElement_(root, rootContainer, options, 0);\n\n  this.setInputHandlers_();\n\n  if (options && options.excludeRoot) {\n    rootElem.classList.add(\"exclude\");\n  }\n\n}\n\nTree.prototype.constructor = Tree;\nGlobalManagerMixin.call(Tree.prototype);\n\n/**\n                                          * Remove tree from DOM.\n                                          *\n                                          * @alias Autodesk.Viewing.UI.Tree#destroy\n                                          */\nTree.prototype.destroy = function () {\n  this.myDelegate = null;\n  if (this.parentContainer) {\n    this.parentContainer.removeChild(this.myRootContainer);\n    this.myRootContainer = null;\n    this.parentContainer = null;\n  }\n};\n\n/**\n    * Show/hide the tree control\n    * @param {boolean} show - true to show the tree control, false to hide it\n    *\n    * @alias Autodesk.Viewing.UI.Tree#show\n    */\nTree.prototype.show = function (show) {\n  var rootContainer = this.myRootContainer;\n  if (show) {\n    rootContainer.style.display = 'block'; // TODO: want fade in\n  } else {\n    rootContainer.style.display = 'none';\n  }\n};\n\n/**\n    * Get the root container\n    * @nosideeffects\n    * @returns {string}\n    *\n    * @alias Autodesk.Viewing.UI.Tree#getRootContainer\n    */\nTree.prototype.getRootContainer = function () {\n  return this.myRootContainer;\n};\n\n/**\n    * Get DOM element for a given logical tree node (or its integer id)\n    * @nosideeffects\n    * @param {object} node - Tree node element\n    * @returns {HTMLElement}\n    *\n    * @alias Autodesk.Viewing.UI.Tree#getElementForNode\n    */\nTree.prototype.getElementForNode = function (node) {\n\n  //TODO: Remove this section once all places that hit it are gone\n  if (typeof node !== \"number\" && typeof node !== \"string\") {\n    //avp.logger.warn(\"Node object used where node ID should have\");\n    node = this.myDelegate.getTreeNodeId(node);\n  }\n\n  return this.nodeToElement[node];\n};\n\n/**\n    * Get the tree delegate\n    * @nosideeffects\n    * @returns {TreeDelegate}\n    *\n    * @alias Autodesk.Viewing.UI.Tree#delegate\n    */\nTree.prototype.delegate = function () {\n  return this.myDelegate;\n};\n\n/**\n    * Is the given group node in the tree collapsed?\n    * @nosideeffects\n    * @param {Object} group -The group node\n    * @returns {boolean} true if group node is collapsed, false if expanded\n    *\n    * @alias Autodesk.Viewing.UI.Tree#isCollapsed\n    */\nTree.prototype.isCollapsed = function (group) {\n  return this.hasClass(group, 'collapsed');\n};\n\n/**\n    * Collapse/expand the given group node in the tree\n    * @param {Object} group - the group node\n    * @param {boolean} collapsed - true to collapse the group node, false to expand it\n    *\n    * @alias Autodesk.Viewing.UI.Tree#setCollapsed\n    */\nTree.prototype.setCollapsed = function (group, collapsed, recursive) {\n  if (collapsed) {\n    this.addClass(group, 'collapsed', recursive);\n    this.removeClass(group, 'expanded', recursive);\n  } else {\n    this.addClass(group, 'expanded', recursive);\n    this.removeClass(group, 'collapsed', recursive);\n  }\n};\n\n/**\n    * Collapse/expand all group nodes in the tree\n    * @param {boolean} collapsed - true to collapse tree, false to expand it\n    *\n    * @alias Autodesk.Viewing.UI.Tree#setAllCollapsed\n    */\nTree.prototype.setAllCollapsed = function (collapsed) {\n  var wantNode, changeNode;\n\n  if (collapsed) {\n    wantNode = function wantNode(node) {\n      return node.classList.contains('expanded');\n    };\n    changeNode = function changeNode(node) {\n      node.classList.add('collapsed');\n      node.classList.remove('expanded');\n    };\n\n  } else {\n    wantNode = function wantNode(node) {\n      return node.classList.contains('collapsed');\n    };\n    changeNode = function changeNode(node) {\n      node.classList.add('expanded');\n      node.classList.remove('collapsed');\n    };\n  }\n\n  for (var i = 0; i < this.myGroupNodes.length; ++i) {\n    var node = this.myGroupNodes[i];\n    if (wantNode(node)) {\n      changeNode(node);\n    }\n  }\n};\n\n/**\n    * Add the given nodes to the current selection\n    * @param {Array.<Object>} nodes - nodes to add to the current selection\n    *\n    * @alias Autodesk.Viewing.UI.Tree#addToSelection\n    */\nTree.prototype.addToSelection = function (nodes) {\n  var tree = this;\n\n  function addSingle(node) {\n    var index = tree.mySelectedNodes.indexOf(node);\n    if (index === -1) {\n      tree.mySelectedNodes.push(node);\n      return true;\n    }\n    return false;\n  }\n\n  var numNodes = nodes.length;\n  for (var i = 0; i < numNodes; ++i) {\n    var node = nodes[i];\n    if (addSingle(node)) {\n      this.addClass(node, this.selectedClassName);\n    }\n  }\n};\n\n/**\n    * Remove the given nodes from the current selection\n    * @param {Array.<Object>} nodes - The nodes to remove from the current selection\n    *\n    * @alias Autodesk.Viewing.UI.Tree#removeFromSelection\n    */\nTree.prototype.removeFromSelection = function (nodes) {\n  var tree = this;\n\n  function removeSingle(node) {\n    var index = tree.mySelectedNodes.indexOf(node);\n    if (index !== -1) {\n      tree.mySelectedNodes.splice(index, 1);\n      return true;\n    }\n    return false;\n  }\n\n  for (var i = nodes.length - 1; i >= 0; --i) {\n    var node = nodes[i];\n    if (removeSingle(node)) {\n      this.removeClass(node, this.selectedClassName);\n    }\n  }\n};\n\n/**\n    * Set the current selection\n    * @param {Array.<Object>} nodes - nodes to make currently selected\n    *\n    * @alias Autodesk.Viewing.UI.Tree#setSelection\n    */\nTree.prototype.setSelection = function (nodes) {\n  this.removeFromSelection(this.mySelectedNodes);\n  this.addToSelection(nodes);\n  return this.mySelectedNodes;\n};\n\n/**\n    * Get the current selection\n    * @returns {Array.<Object>} selected nodes.\n    *\n    * @alias Autodesk.Viewing.UI.Tree#getSelection\n    */\nTree.prototype.getSelection = function () {\n  return this.mySelectedNodes.concat(); // shallow copy\n};\n\n/**\n    * Clear the current selection\n    *\n    * @alias Autodesk.Viewing.UI.Tree#clearSelection\n    */\nTree.prototype.clearSelection = function () {\n  this.removeFromSelection(this.mySelectedNodes);\n};\n\n/**\n    * Is the given node selected?\n    * @nosideeffects\n    * @param {Object} node - The tree node\n    * @returns {boolean} - true if node is selected, false otherwise\n    *\n    * @alias Autodesk.Viewing.UI.Tree#isSelected\n    */\nTree.prototype.isSelected = function (node) {\n  return this.hasClass(node, this.selectedClassName);\n};\n\n/**\n    * Scrolls the container to reveal the node's DOM element.\n    *\n    * @param {object} node - the Tree node\n    *\n    * @alias Autodesk.Viewing.UI.Tree#scrollTo\n    */\nTree.prototype.scrollTo = function (node) {\n  var elem = this.getElementForNode(node);\n\n  if (elem) {\n    var total = elem.offsetTop;\n    elem = elem.parentNode;\n    while (elem && elem != this.myRootContainer) {\n      total += elem.offsetTop;\n      elem = elem.parentNode;\n    }\n\n    var scrollContainer = this.myRootContainer.parentNode;\n    if (this.myDelegate.getScrollContainer()) {\n      // The scroll container may be above the root container.\n      // For such cases, we need to rely on the delegate to tell us \n      // which div to scroll.\n      scrollContainer = this.myDelegate.getScrollContainer();\n    }\n    scrollContainer.scrollTop = total;\n  }\n};\n\n\n/**\n    * Add a CSS class to a node\n    * @param {Number|Object} node - The tree node\n    * @param {string} className\n    * @returns {boolean} - true if the class was added, false otherwise\n    *\n    * @alias Autodesk.Viewing.UI.Tree#addClass\n    */\nTree.prototype.addClass = function (node, className, recursive) {\n\n  var elem = this.getElementForNode(node);\n  if (elem) {\n\n    if (recursive) {\n      //It is intentional that the recursive add starts at the parent.\n      elem = elem.parentNode;\n      var top = this.myOptions.excludeRoot ? this.rootElem : this.myRootContainer;\n      while (elem && elem !== top) {\n        elem.classList.add(className);\n        elem = elem.parentNode;\n      }\n    } else {\n      elem.classList.add(className);\n    }\n\n    return true;\n  }\n\n  return false;\n};\n\n/**\n    * Remove a class from a node\n    * @param {Number|Object} node - The tree node or its dbId\n    * @param {string} className\n    * @returns {boolean} - true if the class was removed, false otherwise\n    *\n    * @alias Autodesk.Viewing.UI.Tree#removeClass\n    */\nTree.prototype.removeClass = function (node, className, recursive) {\n  var elem = this.getElementForNode(node);\n  if (elem) {\n\n    if (recursive) {\n      //It is intentional that the recursive add starts at the parent.\n      elem = elem.parentNode;\n      var top = this.myOptions.excludeRoot ? this.rootElem : this.myRootContainer;\n      while (elem && elem !== top) {\n        elem.classList.remove(className);\n        elem = elem.parentNode;\n      }\n    } else {\n      elem.classList.remove(className);\n    }\n\n    return true;\n  }\n\n  return false;\n};\n\n/**\n    * Does the node have the given class?\n    * @nosideeffects\n    * @param {Number|Object} node - The node or its dbId\n    * @param {string} className\n    * @returns {boolean} true if the node has the given class, false otherwise\n    *\n    * @alias Autodesk.Viewing.UI.Tree#hasClass\n    */\nTree.prototype.hasClass = function (node, className) {\n  return this.getElementForNode(node).classList.contains(className);\n};\n\n\n/**\n    * Clears the contents of the tree\n    *\n    * @alias Autodesk.Viewing.UI.Tree#clear\n    */\nTree.prototype.clear = function () {\n\n  var rootContainer = this.myRootContainer;\n  while (rootContainer.hasChildNodes()) {\n    rootContainer.removeChild(rootContainer.lastChild);\n  }\n\n  this.nodeToElement = {};\n  this.nodeIdToNode = {};\n};\n\n/**\n    * Given a node, create the corresponding HTML elements for the node and all of its descendants\n    * @private\n    * @param {Object} node - Node in the model Document\n    * @param {HTMLElement} parentElement\n    * @param {Object=} [options] - An optional dictionary of options.  Current parameters:\n    *                              {boolean} [localize] - when true, localization is attempted for the given node; false by default.\n    * @param {Number} [depth]\n    *\n    * @private\n    */\nTree.prototype.createElement_ = function (node, parentElement, options, depth) {\n  if (node === undefined || node === null) {\n    return null;\n  }\n\n  if (!this.myDelegate.shouldCreateTreeNode(node)) {\n    return null;\n  }\n\n  var tree = this;\n  var elem;\n\n  function createElementForNode(parentElement, type, classes, theNode) {\n    var root = tree.createHtmlElement_(parentElement, type, classes);\n    var nodeId = tree.myDelegate.getTreeNodeId(theNode);\n    root.setAttribute(\"lmv-nodeId\", nodeId);\n\n    var header = tree.createHtmlElement_(root, 'lmvheader');\n    var icon = tree.createHtmlElement_(header, 'icon');\n\n    icon.addEventListener('mousedown', function (e) {\n      e.stopPropagation();\n      e.preventDefault();\n    }, false);\n\n    icon.addEventListener('click', function (e) {\n      tree.myDelegate.onTreeNodeIconClick(tree, node, e);\n      e.stopPropagation();\n      e.preventDefault();\n    }, false);\n\n    tree.myDelegate.createTreeNode(node, header, options, type, depth);\n    return root;\n  }\n\n  var nodeId = this.myDelegate.getTreeNodeId(node);\n\n  if (tree.myDelegate.isTreeNodeGroup(node)) {\n    elem = createElementForNode(parentElement, 'group', tree.groupClassName, node);\n    tree.nodeToElement[nodeId] = elem;\n    tree.nodeIdToNode[nodeId] = node;\n\n    var whichDepth = tree.myOptions.excludeRoot ? 1 : 0;\n\n    if (depth == whichDepth)\n    elem.style.left = \"0px\";\n\n    // Remember this group node for use by setAllCollapsed().\n    //\n    tree.myGroupNodes.push(elem);\n\n    tree.myDelegate.forEachChild(node, function (child) {\n      tree.createElement_(child, elem, options, depth + 1);\n    });\n\n  } else {\n    elem = createElementForNode(parentElement, 'leaf', tree.leafClassName, node);\n    tree.nodeToElement[nodeId] = elem;\n    tree.nodeIdToNode[nodeId] = node;\n\n    var whichDepth = tree.myOptions.excludeRoot ? 1 : 0;\n\n    if (depth == whichDepth)\n    elem.style.marginLeft = \"0px\";\n  }\n\n  var c = tree.myDelegate.getTreeNodeClass(node);\n  if (c) {\n    elem.classList.add(c);\n  }\n\n  return elem;\n};\n\n/**\n    * @private\n    */\nTree.prototype.setInputHandlers_ = function () {\n\n  var tree = this;\n  var rootElem = this.myRootContainer;\n\n  var NODE_NOT_FOUND = null;\n  var getNodeFromElement = function getNodeFromElement(eventTarget) {\n    var ret = null;\n    var found = false;\n    do {\n      if (!eventTarget || eventTarget === rootElem) {\n        ret = null;\n        found = true; // not found\n      } else if (eventTarget.hasAttribute(\"lmv-nodeId\")) {\n        ret = eventTarget;\n        found = true;\n      } else {\n        eventTarget = eventTarget.parentElement;\n      }\n    } while (!found);\n\n    if (ret) {\n      var nodeId = ret.getAttribute(\"lmv-nodeId\");\n      return tree.nodeIdToNode[nodeId] || NODE_NOT_FOUND;\n    }\n    return NODE_NOT_FOUND;\n  };\n\n  if (isTouchDevice()) {\n    this.hammer = new Hammer.Manager(rootElem, {\n      recognizers: [\n      GestureRecognizers.doubletap,\n      GestureRecognizers.press],\n\n      handlePointerEventMouse: false,\n      inputClass: isIE11 ? Hammer.PointerEventInput : Hammer.TouchInput });\n\n    this.hammer.on(\"doubletap\", function (event) {\n      var node = getNodeFromElement(event.target);\n      if (node === NODE_NOT_FOUND) return;\n      tree.myDelegate.onTreeNodeDoubleClick(tree, node, event);\n    });\n\n    this.hammer.on('press', function (event) {\n      var node = getNodeFromElement(event.target);\n      if (node === NODE_NOT_FOUND) return;\n      tree.myDelegate.onTreeNodeRightClick(tree, node, event);\n    });\n  }\n\n  rootElem.addEventListener('click', function (event) {\n    var node = getNodeFromElement(event.target);\n    if (node === NODE_NOT_FOUND) return;\n    tree.myDelegate.onTreeNodeClick(tree, node, event);\n    event.stopPropagation();\n    if (!event.target.classList.contains('propertyLink')) {\n      event.preventDefault();\n    }\n  }, false);\n\n  rootElem.addEventListener('dblclick', function (event) {\n    var node = getNodeFromElement(event.target);\n    if (node === NODE_NOT_FOUND) return;\n    tree.myDelegate.onTreeNodeDoubleClick(tree, node, event);\n    event.stopPropagation();\n    event.preventDefault();\n  }, false);\n\n  rootElem.addEventListener('contextmenu', function (event) {\n    var node = getNodeFromElement(event.target);\n    if (node === NODE_NOT_FOUND) return;\n    tree.myDelegate.onTreeNodeRightClick(tree, node, event);\n    event.stopPropagation();\n    event.preventDefault();\n  }, false);\n\n  rootElem.addEventListener('mouseover', function (event) {\n    var node = getNodeFromElement(event.target);\n    if (node === NODE_NOT_FOUND) return;\n    tree.myDelegate.onTreeNodeHover(tree, node, event);\n    event.stopPropagation();\n    event.preventDefault();\n  }, false);\n\n  rootElem.addEventListener('mouseout', function (event) {\n    // When the mouse leaves the element, set node to -1 (background), no highlight,\n    // If the mouse out event is within the same element. don't do anything.\n    var e = event.toElement || event.relatedTarget;\n    if (getNodeFromElement(event.target) != getNodeFromElement(e)) {\n      var node = -1;\n      tree.myDelegate.onTreeNodeHover(tree, node, event);\n      event.stopPropagation();\n      event.preventDefault();\n    }\n  }, false);\n};\n\n/**\n    * Create an HTML element\n    * @private\n    * @param {HTMLElement} parent - Parent element of the new HTML element\n    * @param {string} tagName - New HTML element tag name\n    * @param {string=} [className] - New HTML element class\n    * @returns {HTMLElement} The newly-created HTML element\n    */\nTree.prototype.createHtmlElement_ = function (parent, tagName, className) {\n  var _document = this.getDocument();\n  var elem = _document.createElement(tagName);\n  parent.appendChild(elem);\n\n  if (className) {\n    elem.className = className;\n  }\n\n  return elem;\n};\n\n/**\n    * Iterates through nodes in the tree in pre-order.\n    * @param {Object|Number} node - node at which to start the iteration.\n    * @param {function} callback - invoked for each iterated node with (Object, HTMLElement)\n    *\n    * @alias Autodesk.Viewing.UI.Tree#iterate\n    */\nTree.prototype.iterate = function (node, callback) {\n  // roodId === 0 is a valid root node\n  if (node === undefined || node === null) {\n    return;\n  }\n  if (this.myDelegate.shouldCreateTreeNode(node)) {\n    var elem = this.getElementForNode(node);\n    if (elem) {\n      callback(node, elem);\n\n      var scope = this;\n      this.myDelegate.forEachChild(node, function (child) {\n        scope.iterate(child, callback);\n      });\n    }\n  }\n};","\nimport { i18n } from \"../globalization/i18next\";\nimport { GlobalManagerMixin } from '../application/GlobalManagerMixin';\n\n\n/**\n                                                                         * Tree view control delegate\n                                                                         * This class allows you to customize the behavior of a Tree view control.\n                                                                         * Override the methods you want and pass an instance of this class to\n                                                                         * the Tree constructor.\n                                                                         * @constructor\n                                                                         */\nexport function TreeDelegate() {\n}\n\nGlobalManagerMixin.call(TreeDelegate.prototype);\nTreeDelegate.prototype.constructor = TreeDelegate;\n\n/**\n                                                    * Override this method to specify whether or not a node is a group node\n                                                    * @param {Object} node - Node in the model Document\n                                                    * @returns {boolean} true if this node is a group node, false otherwise\n                                                    */\nTreeDelegate.prototype.isTreeNodeGroup = function (node) {\n  throw 'isTreeNodeGroup is not implemented.';\n};\n\n/**\n    * Override this method to specify the id for a node\n    * @param {Object} node - Node in the model Document\n    * @returns {string} Id of the tree node\n    */\nTreeDelegate.prototype.getTreeNodeId = function (node) {\n  throw 'getTreeNodeId is not implemented.';\n};\n\n/**\n    * Override this method to specify the index for a node\n    * @param {Object} node - Node in the model Document\n    * @returns {string} Id of the tree node\n    */\nTreeDelegate.prototype.getTreeNodeIndex = function (node) {\n  throw 'getTreeNodeIndex is not implemented.';\n};\n\n/**\n    * Override this method to specify the parent node id for a node\n    * @param {string} nodeId - Node in the model Document\n    * @returns {string} Id of the tree node\n    */\nTreeDelegate.prototype.getTreeNodeParentId = function (nodeId) {\n  throw 'getTreeNodeParentId is not implemented.';\n};\n\n/**\n    * Override this method to specify the label for a node\n    * @param {Object} node - Node in the model Document\n    * @returns {string} Label of the tree node\n    */\nTreeDelegate.prototype.getTreeNodeLabel = function (node) {\n  return node.name;\n};\n\n/**\n    * Override this method to specify the total number of nodes in the tree\n    * @returns {Number} Number of nodes in the tree.\n    */\nTreeDelegate.prototype.getTreeNodeCount = function () {\n  throw 'getTreeNodeCount is not implemented.';\n};\n\n/**\n    * Override this method to specify if a tree node should be created for this node\n    * @param {Object} node - Node in the model Document\n    * @returns {boolean} true if a node should be created, false otherwise\n    */\nTreeDelegate.prototype.shouldCreateTreeNode = function (node) {\n  return true;\n};\n\n\n/**\n    * Iterates over the children of a given node and calls the callback with each child.\n    */\nTreeDelegate.prototype.forEachChild = function (node, callback) {\n  var childCount = node.children ? node.children.length : 0;\n  for (var childIndex = 0; childIndex < childCount; ++childIndex) {\n    var child = node.children[childIndex];\n    callback(child);\n  }\n};\n\n\n/**\n    * Override this to create the HTMLContent for this node for appending to the\n    * parent.  By default, a label is created.\n    *\n    * @param {Object} node - Node in the model Document\n    * @param {HTMLElement} parent - the parent for this content.\n    * @param {Object=} [options] - An optional dictionary of options.  Current parameters:\n    *                              {boolean} [localize] - when true, localization is attempted for the given node; false by default.\n    * @param {string} type - The type of leaf, either `group` of `leaf`.\n    * @param {number} depth - the current tree depth. First one is 0.\n    *\n    * @private\n    */\nTreeDelegate.prototype.createTreeNode = function (node, parent, options, type, depth) {\n  var _document = this.getDocument();\n  var label = _document.createElement('label');\n  parent.appendChild(label);\n\n  var text = this.getTreeNodeLabel(node);\n  if (options && options.localize) {\n    label.setAttribute('data-i18n', text);\n    text = i18n.translate(text);\n  }\n  label.textContent = text;\n  return label;\n};\n\n/**\n    * Override this method to do something when the user clicks on a tree node\n    * @param {Tree} tree\n    * @param {Object} node - Node in the model Document\n    * @param {Event} event\n    */\nTreeDelegate.prototype.onTreeNodeClick = function (tree, node, event) {};\n\n/**\n                                                                           * Override this to do something when the user clicks on this tree node's icon.\n                                                                           * The default behavior is for the icons for group nodes to toggle the collapse/expand\n                                                                           * state of that group.\n                                                                           * @param {Tree} tree\n                                                                           * @param {Object} node - Node in the model Document\n                                                                           * @param {Event} event\n                                                                           */\nTreeDelegate.prototype.onTreeNodeIconClick = function (tree, node, event) {\n  if (tree.delegate().isTreeNodeGroup(node)) {\n    tree.setCollapsed(node, !tree.isCollapsed(node));\n  }\n};\n\n/**\n    * Override this to do something when the user double-clicks on a tree node\n    * @param {Tree} tree\n    * @param {Object} node - Node in the model Document\n    * @param {Event} event\n    */\nTreeDelegate.prototype.onTreeNodeDoubleClick = function (tree, node, event) {};\n\n/**\n                                                                                 * Override this to do something when the user right-clicks on a tree node\n                                                                                 * @param {Tree} tree\n                                                                                 * @param {Object} node - Node in the model Document\n                                                                                 * @param {Event} event\n                                                                                 */\nTreeDelegate.prototype.onTreeNodeRightClick = function (tree, node, event) {};\n\n/**\n                                                                                * Override this to do something when the tree control changes its size, \n                                                                                * the event is fired by only TreeOnDemand objects.\n                                                                                * @param {Tree} tree\n                                                                                */\nTreeDelegate.prototype.onTreeNodeReized = function (tree) {};\n\n/**\n                                                               * Override this to specify the type of a node. This way, in css, the designer\n                                                               * can specify custom styling per type.\n                                                               * @param {Object} node - Node in the model Document\n                                                               * @returns {string} Class for the node\n                                                               */\nTreeDelegate.prototype.getTreeNodeClass = function (node) {\n  return '';\n};\n\n/**\n    * Override this to specify the maximum tree's container html size. This method is used by\n    * TreeOnDemand to calculate the amount of nodes it will create at any specific time.\n    * @param {Object} node - Node in the model Document\n    * @returns {Number} - HTMLELement for node height in pixels\n    */\nTreeDelegate.prototype.getTreeNodeParentMaxSize = function (node) {\n  return { width: 0, height: 0 };\n};\n\n/**\n    * Override this to specify the html element height of a node depending on its type.\n    * This method is used by TreeOnDemand to calculate the layout of the elements it creates at any specific time.\n    * @param {Object} node - Node in the model Document\n    * @returns {Number} - HTMLELement for node height in pixels\n    */\nTreeDelegate.prototype.getTreeNodeClientHeight = function (node) {\n  return 0;\n};\n\n/**\n    * Override this to specify the left offset of a node depending on its type and depth level in the tree.\n    * This method is used by TreeOnDemand to calculate the layout of the elements it creates at any specific time.\n    * @param {Object} node - Node in the model Document\n    * @param {Number} depthLevel - Number of parents of in the hirarchy tree.\n    * @returns {Number} HTMLELement for node left offset position in pixels\n    */\nTreeDelegate.prototype.getTreeNodeDepthOffset = function (node, depthLevel) {\n  return 0;\n};\n\n/**\n    * Override this method to do something when the user hovers on a tree node\n    * @param {Tree} tree\n    * @param {Object} node - Node in the model Document\n    * @param {Event} event\n   */\nTreeDelegate.prototype.onTreeNodeHover = function (tree, node, event) {};\n\n\n/**\n                                                                           * Override this method to do specify a different HTMLElement that gets scrolled when invoking {@link Autodesk.Viewing.UI.Tree#scrollTo}.\n                                                                           * Requied when the Tree is embedded into a Tab within a DockingPanel.\n                                                                           *\n                                                                           * @returns {HTMLElement|null} \n                                                                          */\nTreeDelegate.prototype.getScrollContainer = function () {\n  return null;\n};","// extracted by mini-css-extract-plugin","\nimport { isTouchDevice, isIE11 } from \"../compat\";\nimport { GestureRecognizers } from \"../tools/GestureHandler\";\nimport { LoadingSpinner } from \"./LoadingSpinner\";\nimport { i18n } from \"../globalization/i18next\";\nimport { GlobalManagerMixin } from '../application/GlobalManagerMixin';\nvar Hammer = require('../../thirdparty/hammer/hammer.js');\n\n\nvar ELEMENT_POOL_LENGHT = 150;\nvar SCROLL_SAFE_PADDING = 300; // Pixels\n\n/**\n * TreeOnDemand view control\n * It takes ownership of the contents in parentContainer.\n * \n * @constructor\n * @param {HTMLElement} scrollContainer - DOM element parent of the tree.\n */\nexport function TreeOnDemand(scrollContainer, options) {\n\n  this.dirty = false;\n  this.nextFrameId = 0;\n  this.scrollY = 0;\n  this.delegates = [];\n  this.idToDelegate = {};\n  this.options = options;\n\n  var _document = this.getDocument();\n\n  // Initialize root container.\n  this.rootContainer = _document.createElement('div');\n  this.rootContainer.classList.add('docking-panel-container-gradient');\n  this.rootContainer.classList.add('treeview');\n  this.rootContainer.classList.add('on-demand');\n  scrollContainer.appendChild(this.rootContainer);\n\n  this.paddingDiv = _document.createElement('div');\n  this.paddingDiv.style['border'] = 0;\n  this.paddingDiv.style['margin'] = 0;\n  this.paddingDiv.style['padding'] = 0;\n  this.sizedDiv = scrollContainer.parentNode; // Just a reference, we are not supposed to change it.\n\n  // Initialize common tables across all delegates.\n  // These are tables to share CSS strings between nodes.\n  this.nodeCssTable = [[], ['group'], ['leaf']];\n  this.cssStringToNodeCssTable = { '': 0, 'group': 1, 'leaf': 2 };\n  this.nodeIndexToNodeCssTables = {}; // Contains Typed-Arrays per model id.\n\n  // Creates element pools.\n  var elementsPool = [];\n  var elementsPoolCount = ELEMENT_POOL_LENGHT;\n\n  for (var i = 0; i < elementsPoolCount; ++i) {\n    var element = createNodeHTmlElement(_document);\n    elementsPool[i] = element;\n  }\n\n  this.elementsPool = elementsPool;\n  this.elementsUsed = 0;\n\n  this.spinner = new LoadingSpinner(scrollContainer);\n  this.spinner.setGlobalManager(this.globalManager);\n  this.spinner.addClass('tree-loading-spinner');\n\n  // Add input event listeners.\n  var touchDevice = isTouchDevice();\n\n  if (touchDevice) {\n    this.hammer = new Hammer.Manager(this.rootContainer, {\n      recognizers: [\n      GestureRecognizers.doubletap,\n      GestureRecognizers.press],\n\n      handlePointerEventMouse: false,\n      inputClass: isIE11 ? Hammer.PointerEventInput : Hammer.TouchInput });\n\n  }\n\n  for (var i = 0; i < elementsPoolCount; ++i) {\n    var element = elementsPool[i];\n\n    if (touchDevice) {\n      this.hammer.on('doubletap', onElementDoubleTap.bind(this));\n      this.hammer.on('press', onElementPress.bind(this));\n    }\n\n    element.addEventListener('click', onElementClick.bind(this));\n    element.addEventListener('dblclick', onElementDoubleClick.bind(this));\n    element.addEventListener('contextmenu', onElementContextMenu.bind(this));\n\n    element.icon.addEventListener('click', onElementIconClick.bind(this));\n    element.icon.addEventListener('mousedown', onElementIconMouseDown.bind(this));\n  }\n\n  redraw(this);\n};\n\nvar proto = TreeOnDemand.prototype;\nproto.constructor = TreeOnDemand;\nGlobalManagerMixin.call(proto);\n\n\n/**\n                                 * A delegate is added whenever a new model is loaded into the scene.\n                                 * The instanceTree is not available at this point.\n                                 */\nproto.pushDelegate = function (delegate) {\n\n  this.delegates.push(delegate);\n  this.idToDelegate[delegate.model.id] = delegate;\n  redraw(this);\n};\n\n/**\n    * Removes the delegate and tree-ui for a given model id.\n    */\nproto.removeDelegate = function (modelId) {\n  for (var i = 0; i < this.delegates.length; ++i) {\n    var delegate = this.delegates[i];\n    if (delegate.model.id === modelId) {\n      this.delegates.splice(i, 1);\n      delete this.idToDelegate[modelId];\n      delete this.nodeIndexToNodeCssTables[modelId];\n      redraw(this);\n      return true;\n    }\n  }\n  return false;\n};\n\n/**\n    * Specifies that the model associated to the delegate doesn't have a tree structure.\n    * Probably because the property database wasn't loaded or is broken somehow.\n    */\nproto.setInstanceTree = function (delegate, instanceTree) {\n\n  delegate.setInstanceTree(instanceTree);\n  redraw(this);\n\n  if (!instanceTree)\n  return;\n\n\n  // Initialize per/delegate table mapping.\n  // It complements the CSS tables created in the constructor.\n  var nodeIndexToNodeCssTable = new Uint8Array(delegate.getTreeNodeCount());\n\n  var createTables = function createTables(nodeId) {\n    var nodeIndex = delegate.getTreeNodeIndex(nodeId);\n    nodeIndexToNodeCssTable[nodeIndex] = delegate.isTreeNodeGroup(nodeId) ? 1 : 2;\n  };\n\n  var rootId = delegate.instanceTree.getRootId();\n  delegate.forEachChild(rootId, createTables, true);\n\n  var modelId = delegate.model.id;\n  this.nodeIndexToNodeCssTables[modelId] = nodeIndexToNodeCssTable;\n\n\n\n  var childId = 0;\n  var childCount = 0;\n  instanceTree.enumNodeChildren(rootId, function (child) {\n    if (!childCount) {\n      childId = child;\n    }\n    childCount++;\n  });\n\n  // Initialize collapsed states.\n  this.setAllCollapsed(delegate, true);\n\n  var excludeRoot = this.options.excludeRoot;\n  var startCollapsed = this.options.startCollapsed;\n\n  if (excludeRoot) {\n    this.setCollapsed(delegate, rootId, false);\n    if (!startCollapsed) {\n      this.setCollapsed(delegate, childId, false);\n    }\n  } else {\n    if (!startCollapsed) {\n      this.setCollapsed(delegate, delegate.rootId, false);\n    }\n  }\n\n  redraw(this, true);\n};\n\n/**\n    * Show/hide the tree control\n    * @param {boolean} show - true to show the tree control, false to hide it\n    */\nproto.show = function (show) {\n\n  this.rootContainer.style.display = 'show' ? block : 'none';\n};\n\n/**\n    * Get the root container\n    * @nosideeffects\n    * @returns {string}\n    */\nproto.getRootContainer = function () {\n\n  return this.rootContainer;\n};\n\n/**\n    * Get the tree delegate\n    * \n    * @nosideeffects\n    * @returns {TreeDelegate}\n    */\nproto.getDelegate = function (modelId) {\n\n  return this.idToDelegate[parseInt(modelId)];\n};\n\n/**\n    * Is the given group node in the tree collapsed?\n    * @nosideeffects\n    * @param {Object} group -The group node\n    * @returns {boolean} true if group node is collapsed, false if expanded\n    */\nproto.isCollapsed = function (delegate, group) {\n\n  var css = getNodeCss(this, delegate, group);\n  return css && css.indexOf('collapsed') !== -1;\n};\n\n/**\n    * Collapse/expand the given group node in the tree\n    * @param {Object} delegate\n    * @param {Object} group - the group node\n    * @param {boolean} collapsed - true to collapse the group node, false to expand it\n    */\nproto.setCollapsed = function (delegate, group, collapsed, recursive) {\n\n  // TODO: If need, we can optimize going trough the tree only once.\n  if (collapsed) {\n    this.addClass(delegate, group, 'collapsed', recursive);\n    this.removeClass(delegate, group, 'expanded', recursive);\n  } else {\n    this.addClass(delegate, group, 'expanded', recursive);\n    this.removeClass(delegate, group, 'collapsed', recursive);\n  }\n};\n\n/**\n    * Collapse/expand all group nodes in the tree\n    * @param {object} delegate\n    * @param {boolean} collapsed - true to collapse tree, false to expand it\n    */\nproto.setAllCollapsed = function (delegate, collapsed) {\n\n  var collapse = collapsed ?\n  function (node) {\n    this.addClass(delegate, node, 'collapsed', false);\n    this.removeClass(delegate, node, 'expanded', false);\n  }.bind(this) :\n  function (node) {\n    this.addClass(delegate, node, 'collapsed', false);\n    this.removeClass(delegate, node, 'expanded', false);\n  }.bind(this);\n\n  var rootId = delegate.instanceTree.getRootId();\n  this.iterate(delegate, rootId, function (node) {\n    delegate.isTreeNodeGroup(node) && collapse(node);\n    return true;\n  });\n};\n\n/**\n    * Add the given nodes to the current selection\n    * @param {Array.<Object>} nodes - nodes to add to the current selection\n    */\nproto.addToSelection = function (delegate, nodes) {\n\n  var nodesCount = nodes.length;\n\n  for (var i = 0; i < nodesCount; ++i) {\n    this.addClass(delegate, nodes[i], 'selected', false);\n  }\n\n  redraw(this);\n};\n\n/**\n    * Remove the given nodes from the current selection\n    * @param {Array.<Object>} nodes - The nodes to remove from the current selection\n    */\nproto.removeFromSelection = function (delegate, nodes) {\n\n  var nodesCount = nodes.length;\n\n  for (var i = 0; i < nodesCount; ++i) {\n    this.removeClass(delegate, nodes[i], 'selected', false);\n  }\n\n  redraw(this);\n};\n\n/**\n    * Set the current selection\n    * @param {Array.<Object>} nodes - nodes to make currently selected\n    */\nproto.setSelection = function (delegate, nodes) {\n\n  this.clearSelection(delegate);\n  this.addToSelection(delegate, nodes);\n\n  return this.selectedNodes;\n};\n\n/**\n    * Clear the current selection\n    */\nproto.clearSelection = function (delegate) {\n\n  // In order to optimize memmory, we send one at a time (the whole model could be selected).\n  var nodeToRemove = [];\n  var unselect = function (nodeId) {\n\n    var css = getNodeCss(this, delegate, nodeId);\n\n    if (css && css.indexOf('selected') !== -1) {\n      nodeToRemove[0] = nodeId;\n      this.removeFromSelection(delegate, nodeToRemove);\n    }\n  }.bind(this);\n\n  var rootId = delegate.instanceTree.getRootId();\n\n  delegate.forEachChild(rootId, unselect, true);\n};\n\n/**\n    * Is the given node selected?\n    * @nosideeffects\n    * @param {Object} node - The tree node\n    * @returns {boolean} - true if node is selected, false otherwise\n    */\nproto.isSelected = function (node) {\n\n  var css = getNodeCss(this, delegate, node);\n  return css && css.indexOf('selected') !== -1;\n};\n\n/**\n    * Expands the Tree to have the node UI be visible.\n    * It also returns the pixel height required to scroll in orther to get the element visible. \n    * \n    * @param {Object} nodeId - The node id\n    * @param {Autodesk.Viewing.Model} model - The model that owns the id.\n    * \n    * @returns {number} the pixel height required to scroll the container to allow the nodeId to be visible.\n    */\nproto.scrollTo = function (nodeId, model) {\n\n  var delegate = this.getDelegate(model.id);\n  if (delegate && delegate.isNotAvailable()) {\n    // There is no tree for the model and so\n    // no target to scroll to\n    return;\n  }\n  var nodeFound = false;\n  var expandedHeightStack = []; // Heights of the visible branches and nodes before node.\n\n  var getNodeScrollTop = function (candidateId, iDelegate) {\n\n    nodeFound = nodeFound || nodeId === candidateId;\n    if (nodeFound) {\n      return;\n    }\n\n    expandedHeightStack.push(iDelegate.getTreeNodeClientHeight(candidateId));\n\n    var stackSize = expandedHeightStack.length;\n    var elementExpanded =\n    iDelegate.isTreeNodeGroup(candidateId) &&\n    getNodeCss(this, iDelegate, candidateId).indexOf('expanded') !== -1;\n\n    iDelegate.forEachChild(candidateId, function (id) {\n      getNodeScrollTop(id, iDelegate);\n    });\n\n    if (!elementExpanded && !nodeFound) {\n      if (expandedHeightStack.length > stackSize) {\n        expandedHeightStack.splice(stackSize);\n      }\n    }\n  }.bind(this);\n  this.setCollapsed(delegate, nodeId, false, true);\n\n  // Calculate and set the container's parent scroll top.\n  var rootId = delegate.getRootId();\n  getNodeScrollTop(rootId, delegate);\n  if (!nodeFound) {\n    return -1;\n  }\n\n  var scrollTop = 0;\n  var expandedHeightStackCount = expandedHeightStack.length;\n  for (var i = this.isExcludeRoot() ? 1 : 0; i < expandedHeightStackCount; ++i) {\n    scrollTop += expandedHeightStack[i];\n  }\n\n  // If single model, early return...\n  if (this.delegates.length === 1) {\n    redraw(this, true);\n    return scrollTop;\n  }\n\n\n  // Multi model treatment, take into account other models on top\n  for (var i = 0; i < this.delegates.length; ++i) {\n\n    var otherDelegate = this.delegates[i];\n    if (otherDelegate === delegate) {\n      break;\n    }\n\n    expandedHeightStack = [];\n    nodeId = -1;\n    nodeFound = false;\n    rootId = otherDelegate.getRootId();\n    getNodeScrollTop(rootId, otherDelegate);\n\n    expandedHeightStackCount = expandedHeightStack.length;\n    var othersHeight = 0;\n    for (var j = 0; j < expandedHeightStackCount; ++j) {\n      othersHeight += expandedHeightStack[j];\n    }\n    scrollTop += othersHeight;\n  }\n\n  // Avoid scrolling\n  redraw(this, true);\n  return scrollTop;\n};\n\n/**\n    * Add a class to a node\n    * @param {object} delegate\n    * @param {Number|Object} node - The tree node\n    * @param {string} className\n    * @returns {boolean} - true if the class was added, false otherwise\n    */\nproto.addClass = function (delegate, node, className, recursive) {\n\n  function add(tree, nodeId, className) {\n\n    var css = getNodeCss(tree, delegate, nodeId);\n    if (!css) {\n      return;\n    }\n\n    var cssIndex = css.indexOf(className);\n    if (cssIndex !== -1) {\n      return;\n    }\n\n    css = css.slice(0);\n    css.push(className);\n    css.sort();\n\n    setNodeCss(tree, delegate, nodeId, css);\n  }\n\n  // It is intentional that the recursive add starts at the parent.\n  if (recursive) {\n    var parentId = delegate.getTreeNodeParentId(getNodeId(this, node));\n    while (parentId) {\n      add(this, parentId, className);\n      parentId = delegate.getTreeNodeParentId(parentId);\n    }\n  } else {\n    add(this, node, className);\n  }\n\n  redraw(this);\n  return true;\n};\n\n/**\n    * Remove a class from a node\n    * @param {object} delegate\n    * @param {Number|Object} node - The tree node or its dbId\n    * @param {string} className\n    * @returns {boolean} - true if the class was removed, false otherwise\n    */\nproto.removeClass = function (delegate, node, className, recursive) {\n\n  function remove(tree, nodeId, className) {\n\n    var css = getNodeCss(tree, delegate, nodeId);\n\n    if (!css) {\n      return;\n    }\n\n    var cssIndex = css.indexOf(className);\n\n    if (cssIndex === -1) {\n      return;\n    }\n\n    css = css.slice(0);\n    css.splice(cssIndex, 1);\n\n    setNodeCss(tree, delegate, nodeId, css);\n  };\n\n  //It is intentional that the recursive add starts at the parent.\n  if (recursive) {\n    var parentId = delegate.getTreeNodeParentId(getNodeId(this, node));\n    while (parentId) {\n      remove(this, parentId, className);\n      parentId = delegate.getTreeNodeParentId(parentId);\n    }\n  } else {\n    remove(this, node, className);\n  }\n\n  redraw(this);\n  return true;\n};\n\n/**\n    * Does the node have the given class?\n    * @nosideeffects\n    * @param {Number|Object} node - The node or its dbId\n    * @param {string} className\n    * @returns {boolean} true if the node has the given class, false otherwise\n    */\nproto.hasClass = function (node, className) {\n\n  return getNodeCss(this, delegate, node).indexOf(className) !== 1;\n};\n\n/**\n    * Clears the contents of the tree\n    */\nproto.clear = function () {\n\n  var container = this.rootContainer;\n  var child;\n  while (child = container.lastChild) {\n    container.removeChild(child);\n  }\n\n  // clear children of delegate divs\n  for (var i = 0; i < this.delegates.length; ++i) {\n    this.delegates[i].clean();\n  }\n\n  this.elementsUsed = 0;\n};\n\n/**\n    * Iterates through nodes in the tree in pre-order.\n    * @param {Object} delegate\n    * @param {Object|Number} node - node at which to start the iteration.\n    * @param {function(Object)} callback - callback function for each iterated node, if callbak returns false, node's chidren are not visited.\n    */\nproto.iterate = function (delegate, node, callback) {\n\n  // roodId === 0 is a valid root node\n  if (node === undefined || node === null) {\n    return;\n  }\n\n  if (!delegate.shouldCreateTreeNode(node)) {\n    return;\n  }\n\n  if (!callback(node)) {\n    return;\n  }\n\n  delegate.forEachChild(node, function (child) {\n    this.iterate(delegate, child, callback);\n  }.bind(this));\n};\n\nproto.forEachDelegate = function (callback) {\n\n  for (var i = 0; i < this.delegates.length; ++i) {\n    callback(this.delegates[i]);\n  }\n};\n\nproto.destroy = function () {\n  this.clear();\n  cancelAnimationFrame(this.nextFrameId);\n\n  var scrollContainer = this.rootContainer.parentNode;\n  scrollContainer.removeChild(this.rootContainer);\n\n  this.rootContainer = null;\n  this.rootId = -1;\n  this.nodeCssTable = null;\n  this.nodeIndexToNodeCssTables = null;\n  this.cssStringToNodeCssTable = null;\n  this.elementsPool = null;\n  this.elementsUsed = -1;\n  this.scrollY = -1;\n\n  if (this.hammer) {\n    this.hammer.destroy();\n    this.hammer = null;\n  }\n};\n\nproto.setScroll = function (scrollY) {\n\n  // Avoid re-building the tree unless we have scrolled far enough.\n  if (Math.abs(this.scrollY - scrollY) > SCROLL_SAFE_PADDING) {\n    this.scrollY = scrollY;\n    redraw(this);\n  }\n};\n\nproto.displayNoProperties = function (display) {\n\n  var _document = this.getDocument();\n  if (display) {\n    if (!this.divNoProps) {\n      this.divNoProps = _document.createElement('div');\n      var msgKey = 'Model Browser is not available';\n      this.divNoProps.innerText = i18n.translate(msgKey);\n      this.divNoProps.setAttribute('data-i18n', msgKey);\n      this.divNoProps.classList.add('lmv-no-properties');\n    }\n    if (!this.divNoProps.parentNode) {\n      var scrollContainer = this.rootContainer.parentNode;\n      scrollContainer.appendChild(this.divNoProps);\n    }\n  } else {\n    if (this.divNoProps && this.divNoProps.parentNode) {\n      this.divNoProps.parentNode.removeChild(this.divNoProps);\n    }\n  }\n};\n\nproto.isExcludeRoot = function () {\n  return this.delegates.length === 1 ? this.options.excludeRoot : false;\n};\n\nproto.getDelegateCount = function () {\n  return this.delegates.length;\n};\n\nfunction getTreeNodeParentMaxSize(tree)\n{\n  return {\n    width: tree.sizedDiv.clientWidth | 0x0,\n    height: tree.sizedDiv.clientHeight | 0x0 };\n\n}\n\n/**\n   * @private\n   * Renders the current state of the tree and its delegates (if any)\n   * Handles rendering when there are no delegates and when there is only 1 in loading state.\n   * Delegates most of the hard rendering to createVisibleElements()\n   * \n   * @param {*} tree \n   */\nfunction renderNow(tree) {\n\n  // Clear\n  tree.dirty = false;\n  clearElementTree(tree);\n  tree.displayNoProperties(false);\n\n  // Special case 1: There are no models loaded into LMV\n  if (tree.delegates.length === 0) {\n    // An empty panel is all we want.\n    tree.spinner.setVisible(false);\n    return;\n  }\n\n  // Special case 2: Single model, properties are still loading\n  if (tree.delegates.length === 1 && tree.delegates[0].isLoading()) {\n    tree.spinner.setVisible(true);\n    return;\n  }\n\n  // Special case 3: Single model, properties failed to load\n  if (tree.delegates.length === 1 && tree.delegates[0].isNotAvailable()) {\n    tree.spinner.setVisible(false);\n    tree.displayNoProperties(true);\n    return;\n  }\n\n  // Will render the tree delegate items at this point...\n  tree.spinner.setVisible(false);\n\n  // Render InstanceTree nodes\n  createVisibleElements(tree);\n}\n\n/**\n   * @private\n   * Generates the visible DIVs for the model browser.\n   * \n   * @param {*} tree \n   */\nfunction createVisibleElements(tree) {\n\n  var container = tree.rootContainer;\n  var parentDimensions = getTreeNodeParentMaxSize(tree);\n  var CONTAINER_HEIGHT = parentDimensions.height;\n  var currentHeight = 0;\n  var paddingHeight = 0;\n  var adding = true;\n\n\n  // Add a top-padding element that stretches until the first element shows\n  container.appendChild(tree.paddingDiv);\n\n\n  var delegates = tree.delegates.slice(0);\n  var excludeRoot = tree.isExcludeRoot();\n\n  while (delegates.length) {\n\n    var delegate = delegates.shift();\n\n    // Each tree element gets added into its parent model-div\n    var modelDiv = delegate.modelDiv;\n    container.appendChild(modelDiv);\n\n    var ids = [delegate.getRootId()];\n    var depth = {\n      curr: excludeRoot ? -1 : 0,\n      popIds: [] };\n\n\n    while (ids.length && adding) {\n\n      // Any more room vertically?\n      if (currentHeight > tree.scrollY + CONTAINER_HEIGHT + SCROLL_SAFE_PADDING) {\n        adding = false;\n        break;\n      }\n\n      // Any more DIVs in the pool?\n      if (tree.elementsUsed === tree.elementsPool.length) {\n        adding = false;\n        break;\n      }\n\n      var id = ids.shift();\n      var elemHeight = depth.curr === -1 ? 0 : delegate.getTreeNodeClientHeight(id);\n      var elemTop = currentHeight;\n      var elemBtm = elemTop + elemHeight;\n\n      // render this node\n      if (elemHeight > 0 && elemBtm + SCROLL_SAFE_PADDING >= tree.scrollY) {\n\n        // Actually add the element...\n        var element = tree.elementsPool[tree.elementsUsed++];\n        element.setAttribute(\"lmv-nodeId\", id);\n\n        delegate.createTreeNode(id, element.header);\n        var css = delegate.getTreeNodeClass(id);\n        if (css) {\n          element.classList.add(css);\n        }\n\n        var elementClasses = getNodeCss(tree, delegate, id);\n        if (elementClasses) {\n          var elementClassesCount = elementClasses.length;\n          for (var i = 0; i < elementClassesCount; ++i) {\n            element.classList.add(elementClasses[i]);\n          }\n        }\n\n        var offset = delegate.getTreeNodeDepthOffset(id, depth.curr);\n        element.header.style.paddingLeft = offset + 'px';\n\n        modelDiv.appendChild(element);\n      }\n\n      if (elemBtm + SCROLL_SAFE_PADDING < tree.scrollY) {\n        paddingHeight = elemBtm;\n      }\n\n      // move height counter\n      currentHeight = elemBtm;\n\n      // Children will get a new level of indentation\n      var ignoreCollapsed = elemHeight === 0;\n      var childIds = enqueueChildrenIds(tree, delegate, id, ignoreCollapsed);\n\n      // Inden when id has children and they are visible to the end user\n      if (childIds && childIds.length > 0) {\n        depth.curr++;\n\n        var lastChildId = childIds[childIds.length - 1];\n\n        // Edge case if this node was supposed to pop a level, \n        // then transfer the count to the next generation\n        var top = depth.popIds.length - 1;\n        while (top >= 0 && depth.popIds[top] === id) {\n          depth.popIds[top--] = lastChildId;\n        }\n\n        // Remember when to pop depth back\n        depth.popIds.push(lastChildId);\n\n        // Add children to iteration\n        ids = childIds.concat(ids);\n      }\n\n      while (depth.popIds.length > 0 && id === depth.popIds[depth.popIds.length - 1]) {\n        depth.popIds.pop();\n        depth.curr--;\n      }\n\n    } // while-ids\n\n\n    // Update top-padding height.\n    tree.paddingDiv.style.height = paddingHeight + 'px';\n\n\n    // If there are ids left, we need to process them to get the total height\n    while (ids.length) {\n\n      var id = ids.shift();\n      var elemHeight = depth.curr === -1 ? 0 : delegate.getTreeNodeClientHeight(id);\n      var elemTop = currentHeight;\n      var elemBtm = elemTop + elemHeight;\n\n      // move height counter\n      currentHeight = elemBtm;\n\n      // enqueue children (if any)\n      var childIds = enqueueChildrenIds(tree, delegate, id);\n      if (childIds && childIds.length) {\n        ids = childIds.concat(ids);\n      }\n    }\n\n\n  } // while-delegates\n\n  container.style.height = currentHeight + 'px';\n}\n\nfunction enqueueChildrenIds(tree, delegate, id, ignoreCollapsed) {\n\n  var isGroup = delegate.isTreeNodeGroup(id);\n  if (!isGroup)\n  return null;\n\n  if (!ignoreCollapsed) {\n    var collapsed = tree.isCollapsed(delegate, id);\n    if (collapsed)\n    return null;\n  }\n\n  var childIds = [];\n  delegate.forEachChild(id, function (cId) {\n    childIds.push(cId);\n  });\n\n  return childIds;\n}\n\n\nfunction clearElementTree(tree) {\n  var elementsUsed = tree.elementsUsed;\n  var elementsPool = tree.elementsPool;\n\n  // Return used elements to the elements pool.\n  for (var i = 0; i < elementsUsed; ++i) {\n\n    // Remove node id, just in case.\n    var element = elementsPool[i];\n    element.setAttribute('lmv-nodeId', '');\n\n    // Remove css classes.\n    element.className = '';\n\n    // Remove all controls and listeners added by tree delegate, we spare the icon.\n    var header = element.header;\n    var childrenToRemove = header.childNodes.length - 1;\n\n    for (var j = 0; j < childrenToRemove; ++j) {\n      header.removeChild(header.lastChild);\n    }\n  }\n  tree.clear();\n}\n\n/**\n   *\n   * @param {*} tree\n   * @param {*} initial\n   */\nfunction redraw(tree, immediate) {\n\n  // If the panel is not dirty, marked as dirty and schedule an update during next frame.\n  if (tree.dirty && !immediate) {\n    return;\n  }\n\n  if (immediate) {\n    renderNow(tree);\n  } else {\n    tree.dirty = true;\n\n    // All update requests are executed as one during next frame.\n    tree.nextFrameId = requestAnimationFrame(function () {\n      renderNow(tree);\n    });\n  }\n}\n\n/**\n   * Get the id of the node if it's an object or returns input parameter if it's string or number.\n   * @private\n   * @param {*} node - A node object or a string or number with the id of the node.\n   * @returns {number} The id of the node\n   */\nfunction getNodeId(tree, node) {\n\n  if (typeof node !== \"number\" && typeof node !== \"string\") {\n    return tree.threeDelegate.getTreeNodeId(node | 0x0);\n  }\n  return node;\n}\n\n/**\n   * Returns the node associated to the html element provided\n   * @private\n   * @param {*} tree - A TreeOnDemand object instance.\n   * @param {*} element - A node object or a string or number with the id of the node.\n   * @returns {Number} Node object associated with with the html control.\n   */\nfunction getNodeIdFromElement(tree, element) {\n\n  var nodeElement = null;\n\n  while (element && element !== tree.rootContainer) {\n    if (element.hasAttribute(\"lmv-nodeId\")) {\n      nodeElement = element;\n      break;\n    }\n    element = element.parentElement;\n  }\n\n  if (!nodeElement) {\n    return null;\n  }\n\n  var nodeId = nodeElement.getAttribute(\"lmv-nodeId\");\n  return parseFloat(nodeId);\n};\n\nfunction getModelIdFromElement(tree, element) {\n\n  var nodeElement = null;\n\n  while (element && element !== tree.rootContainer) {\n    if (element.hasAttribute(\"lmv-modelId\")) {\n      nodeElement = element;\n      break;\n    }\n    element = element.parentElement;\n  }\n\n  if (!nodeElement) {\n    return null;\n  }\n\n  var modelId = nodeElement.getAttribute(\"lmv-modelId\");\n  return parseInt(modelId);\n};\n\n/**\n    * Get the css array from the css table.\n    * @private\n    * @param {*} tree - A TreeOnDemand object instance.\n    * @param {*} delegate\n    * @param {Number} nodeId - A node id to whome state will be retrived.\n    * @returns {Array} Array of strings with the css classes\n    */\nfunction getNodeCss(tree, delegate, node) {\n  if (delegate.isControlId(node))\n  return delegate.getControlIdCss(node);\n  var nodeIndex = delegate.getTreeNodeIndex(node);\n  return tree.nodeCssTable[tree.nodeIndexToNodeCssTables[delegate.model.id][nodeIndex]];\n}\n\n/**\n   * Adds a new css entry table is needed and associate the css table index to node.\n   * @private\n   * @param {*} tree - A TreeOnDemand object instance.\n   * @param {*} delegate\n   * @param {Number} nodeId - A node id to whome state will be retrived.\n   * @param {string} css\n   */\nfunction setNodeCss(tree, delegate, node, css) {\n\n  var key = css.join(' ');\n  var index = tree.cssStringToNodeCssTable[key] || tree.nodeCssTable.length;\n\n  if (index === tree.nodeCssTable.length) {\n    tree.nodeCssTable.push(css);\n    tree.cssStringToNodeCssTable[key] = index;\n  }\n\n  var nodeIndex = delegate.getTreeNodeIndex(node);\n  tree.nodeIndexToNodeCssTables[delegate.model.id][nodeIndex] = index;\n}\n\n/**\n   * Given a node, create the corresponding HTML elements for the node and all of its descendants\n   * @private\n   * @param {Object} tree - TreeOnDemand node\n   * @param {Object=} [options] - An optional dictionary of options.  Current parameters:\n   *                              {boolean} [localize] - when true, localization is attempted for the given node; false by default.\n   * @param {Number} [depth]\n   */\nfunction createNodeHTmlElement(_document, tree, options) {\n\n  var header = _document.createElement('lmvheader');\n\n  var icon = _document.createElement('icon');\n  header.appendChild(icon);\n\n  var element = _document.createElement('div');\n  element.header = header;\n  element.icon = icon;\n  element.appendChild(header);\n\n  return element;\n};\n\n/**\n    *\n    * @param {*} event\n    */\nfunction onElementDoubleTap(event) {\n\n  var nodeId = getNodeIdFromElement(this, event.target);\n  if (!nodeId) {\n    return;\n  }\n\n  var modelId = getModelIdFromElement(this, event.target);\n  var delegate = this.getDelegate(modelId);\n  if (!delegate) {\n    return;\n  }\n\n  delegate.onTreeNodeDoubleClick(this, nodeId, event);\n}\n\n/**\n   *\n   * @param {*} event\n   */\nfunction onElementPress(event) {\n\n  var nodeId = getNodeIdFromElement(this, event.target);\n  if (!nodeId) {\n    return;\n  }\n\n  var modelId = getModelIdFromElement(this, event.target);\n  var delegate = this.getDelegate(modelId);\n  if (!delegate) {\n    return;\n  }\n\n  delegate.onTreeNodeRightClick(this, nodeId, event);\n}\n\n/**\n   *\n   * @param {*} event\n   */\nfunction onElementClick(event) {\n\n  // Click has to be done over the children of the tree elements.\n  // Group and leaf nodes are only containers to layout consumer content.\n  if (event.target.classList.contains('group') ||\n  event.target.classList.contains('leaf')) {\n    return;\n  }\n\n  var nodeId = getNodeIdFromElement(this, event.target);\n  if (!nodeId) {\n    return;\n  }\n\n  var modelId = getModelIdFromElement(this, event.target);\n  var delegate = this.getDelegate(modelId);\n  if (!delegate) {\n    return;\n  }\n\n  delegate.onTreeNodeClick(this, nodeId, event);\n  event.stopPropagation();\n  event.preventDefault();\n}\n\n/**\n   *\n   * @param {*} event\n   */\nfunction onElementDoubleClick(event) {\n\n  // Click has to be done over the children of the tree elements.\n  // Group and leaf nodes are only containers to layout consumer content.\n  if (event.target.classList.contains('group') ||\n  event.target.classList.contains('leaf')) {\n    return;\n  }\n\n  var nodeId = getNodeIdFromElement(this, event.target);\n  if (!nodeId) {\n    return;\n  }\n\n  var modelId = getModelIdFromElement(this, event.target);\n  var delegate = this.getDelegate(modelId);\n  if (!delegate) {\n    return;\n  }\n\n  delegate.onTreeNodeDoubleClick(this, nodeId, event);\n  event.stopPropagation();\n  event.preventDefault();\n}\n\n/**\n   *\n   * @param {*} event\n   */\nfunction onElementContextMenu(event) {\n\n  // Click has to be done over the children of the tree elements.\n  // Group and leaf nodes are only containers to layout consumer content.\n  if (event.target.classList.contains('group') ||\n  event.target.classList.contains('leaf')) {\n    return;\n  }\n\n  var nodeId = getNodeIdFromElement(this, event.target);\n  if (!nodeId) {\n    return;\n  }\n\n  var modelId = getModelIdFromElement(this, event.target);\n  var delegate = this.getDelegate(modelId);\n  if (!delegate) {\n    return;\n  }\n\n  delegate.onTreeNodeRightClick(this, nodeId, event);\n  event.stopPropagation();\n  event.preventDefault();\n}\n\n/**\n   *\n   * @param {*} event\n   */\nfunction onElementIconClick(event) {\n\n  var nodeId = getNodeIdFromElement(this, event.target);\n  if (!nodeId) {\n    return;\n  }\n\n  var modelId = getModelIdFromElement(this, event.target);\n  var delegate = this.getDelegate(modelId);\n  if (!delegate) {\n    return;\n  }\n\n  delegate.onTreeNodeIconClick(this, nodeId, event);\n  event.stopPropagation();\n  event.preventDefault();\n}\n\n/**\n   *\n   * @param {*} event\n   */\nfunction onElementIconMouseDown(event) {\n\n  event.stopPropagation();\n  event.preventDefault();\n}","// extracted by mini-css-extract-plugin","\nimport { ModelStructurePanel } from \"./ModelStructurePanel\";\nimport * as et from \"../application/EventTypes\";\nimport * as se from \"./controls/SearchEvents\";\nimport { Searchbox } from \"./controls/Searchbox\";\nimport { logger } from \"../logger/Logger\";\nimport { ViewerPanelMixin } from \"./ViewerPanelMixin\";\n\nvar avp = Autodesk.Viewing.Private;\n\nvar kDefaultDocStructureConfig = {\n  \"click\": {\n    \"onObject\": [\"isolate\"] },\n\n  \"clickShift\": {\n    \"onObject\": [\"toggleMultipleOverlayedSelection\"] },\n\n  \"clickCtrl\": {\n    \"onObject\": [\"toggleVisibility\"] } };\n\n\n\nexport function ViewerModelStructurePanel(viewer, title, options) {\n\n  this.viewer = viewer;\n  this.visible = false;\n  this._trackNodeClick = true; // ADP\n\n  options = options || {};\n  options.defaultTitle = \"Model\";\n  options.excludeRoot = options.excludeRoot !== undefined ? options.excludeRoot : true;\n  options.startCollapsed = options.startCollapsed !== undefined ? options.startCollapsed : false;\n  options.scrollEaseCurve = options.scrollEaseCurve || [0, 0, .29, 1];\n  options.scrollEaseSpeed = options.scrollEaseSpeed !== undefined ? options.scrollEaseSpeed : 0.003; // 0 disables interpolation.\n  options.addFooter = options.addFooter !== undefined ? options.addFooter : true;\n\n  this.clickConfig = options && options.docStructureConfig ? options.docStructureConfig : kDefaultDocStructureConfig;\n  this.isMac = navigator.userAgent.search(\"Mac OS\") !== -1;\n\n  if (options.hideSearch) {\n    options.heightAdjustment = 70;\n    ModelStructurePanel.call(this, viewer.container, viewer.container.id + 'ViewerModelStructurePanel', title, options);\n    this.scrollContainer.classList.add('no-search');\n  } else {\n    options.heightAdjustment = 104; //bigger than default because of search bar\n    ModelStructurePanel.call(this, viewer.container, viewer.container.id + 'ViewerModelStructurePanel', title, options);\n\n    this.searchbox = new Searchbox(viewer.container.id + 'ViewerModelStructurePanel' + '-Searchbox', viewer, { excludeRoot: options.excludeRoot, searchFunction: filterIds.bind(this) });\n    this.searchbox.setGlobalManager(this.globalManager);\n    this.searchbox.addEventListener(se.ON_SEARCH_SELECTED, function (event) {\n      var dbId = event.id;\n      var model = this.viewer.impl.findModel(event.modelId);\n      this.viewer.isolate(dbId, model);\n    }.bind(this));\n    this.container.appendChild(this.searchbox.container);\n  }\n  this.setGlobalManager(viewer.globalManager);\n\n\n  this._ignoreScroll = false;\n\n  this.selectedNodes = {};\n\n  this.onViewerSelect = this.onViewerSelect.bind(this);\n  this.onViewerIsolate = this.onViewerIsolate.bind(this);\n  this.onViewerHide = this.onViewerHide.bind(this);\n  this.onViewerShow = this.onViewerShow.bind(this);\n};\n\nViewerModelStructurePanel.prototype = Object.create(ModelStructurePanel.prototype);\nViewerModelStructurePanel.prototype.constructor = ViewerModelStructurePanel;\nViewerPanelMixin.call(ViewerModelStructurePanel.prototype);\n\n/**\n                                                             * Invoked when the panel is getting destroyed.\n                                                             */\nViewerModelStructurePanel.prototype.uninitialize = function () {\n  if (this.viewer) {\n    this.viewer.removeEventListener(et.AGGREGATE_SELECTION_CHANGED_EVENT, this.onViewerSelect);\n    this.viewer.removeEventListener(et.AGGREGATE_ISOLATION_CHANGED_EVENT, this.onViewerIsolate);\n    this.viewer.removeEventListener(et.HIDE_EVENT, this.onViewerHide);\n    this.viewer.removeEventListener(et.SHOW_EVENT, this.onViewerShow);\n    this.viewer = null;\n  }\n  if (this.searchResults) {\n    this.searchResults.uninitialize();\n    this.searchResults = null;\n  }\n  ModelStructurePanel.prototype.uninitialize.call(this);\n};\n\nViewerModelStructurePanel.prototype.resizeToContent = function () {\n\n  var treeNodesContainer = this.scrollContainer;\n  var rootContainer = this.tree ? this.tree.getRootContainer() : null;\n\n  if (!treeNodesContainer || !rootContainer) {\n    return;\n  }\n\n  var size = 'calc(100% + ' + treeNodesContainer.scrollLeft + 'px)';\n  rootContainer.style.width = size;\n};\n\nViewerModelStructurePanel.prototype.createUI = function () {\n\n  if (this.uiCreated) {\n    return;\n  }\n\n  var viewer = this.viewer;\n  ModelStructurePanel.prototype.createUI.call(this);\n\n  // Get container of the tree nodes, also, set its scrollbar to the left.\n  var treeNodesContainer = this.scrollContainer;\n  treeNodesContainer.classList.remove('left');\n\n  // This method will resize panel according to content each frame, we could implement this in clever and more complicated way\n  // but with the risk to not contemplating all the cases resizing is needed.\n  var onResize = function () {\n    if (this.visible) {\n      this.resizeToContent();\n    }\n    requestAnimationFrame(onResize);\n  }.bind(this);\n  onResize();\n\n  // Set position and height.\n  var options = this.options;\n  var toolbarSize = 0;\n  var margin = 10;\n  var viewerRect = viewer.container.getBoundingClientRect();\n  var toolbar = viewer.getToolbar();\n  var maxHeight = options.maxHeight ? options.maxHeight : viewerRect.height;\n\n  if (toolbar) {\n    var toolbarRect = toolbar.container.getBoundingClientRect();\n    toolbarSize = viewerRect.bottom - toolbarRect.top;\n  } else {\n    toolbarSize = 0;\n  }\n\n  this.container.style.top = margin + 'px';\n  this.container.style.left = margin + 'px';\n  this.container.style.height = 'calc(100% - ' + (toolbarSize + margin * 2) + 'px)';\n  this.container.style.maxHeight = 'calc(100% - ' + (toolbarSize + margin * 2) + 'px)';\n\n  // Show context menu on right click over the panel.\n  treeNodesContainer.addEventListener('contextmenu', function (event) {\n    this.viewer.contextMenu.show(event);\n  }.bind(this));\n\n  // When selection changes in the viewer, the tree reflects the selection.\n  this.viewer.addEventListener(et.AGGREGATE_SELECTION_CHANGED_EVENT, this.onViewerSelect);\n  this.viewer.addEventListener(et.AGGREGATE_ISOLATION_CHANGED_EVENT, this.onViewerIsolate);\n  this.viewer.addEventListener(et.HIDE_EVENT, this.onViewerHide);\n  this.viewer.addEventListener(et.SHOW_EVENT, this.onViewerShow);\n};\n\n/**\n    * Viewer Event handler\n    * @private\n    */\nViewerModelStructurePanel.prototype.onViewerSelect = function (event) {\n  this.setSelection(event.selections);\n  if (!this._ignoreScroll) {\n    this.scrollToSelection(event.selections);\n  }\n  this._ignoreScroll = false;\n};\n\n/**\n    * Viewer Event handler\n    * @private\n    */\nViewerModelStructurePanel.prototype.onViewerIsolate = function (event) {\n  this.setIsolation(event.isolation);\n};\n\n/**\n    * Viewer Event handler\n    * @private\n    */\nViewerModelStructurePanel.prototype.onViewerHide = function (event) {\n  this.setHidden(event.nodeIdArray.slice(), event.model, true);\n};\n\n/**\n    * Viewer Event handler\n    * @private\n    */\nViewerModelStructurePanel.prototype.onViewerShow = function (event) {\n  this.setHidden(event.nodeIdArray.slice(), event.model, false);\n};\n\n\n\nViewerModelStructurePanel.prototype.setVisible = function (show) {\n\n  ModelStructurePanel.prototype.setVisible.call(this, show);\n\n  if (this.visible === show) {\n    return;\n  }\n\n  this.visible = show;\n\n  if (this.visible) {\n    this.sync();\n  }\n};\n\nViewerModelStructurePanel.prototype.sync = function () {\n\n  var isolation = this.viewer.getAggregateIsolation();\n  this.setIsolation(isolation);\n\n  if (isolation.length === 0) {\n    var hidden = this.viewer.getAggregateHiddenNodes();\n    for (var i = 0; i < hidden.length; ++i) {\n      var model = hidden[i].model;\n      var ids = hidden[i].ids;\n      this.setHidden(ids, model, true);\n    }\n  }\n\n  var selection = this.viewer.getAggregateSelection();\n  this.setSelection(selection);\n  this.scrollToSelection(selection);\n};\n\nViewerModelStructurePanel.prototype.removeTreeUI = function (model) {\n\n  delete this.selectedNodes[model.id];\n  ModelStructurePanel.prototype.removeTreeUI.call(this, model);\n};\n\nViewerModelStructurePanel.prototype.setHidden = function (nodes, model, hidden) {\n\n  var tree = this.tree;\n  var delegate = tree.getDelegate(model.id);\n\n  var action = hidden ?\n  function (node) {\n    tree.addClass(delegate, node, 'dim', false);\n    tree.removeClass(delegate, node, 'visible', false);\n    return true;\n  } :\n  function (node) {\n    tree.removeClass(delegate, node, 'dim', false);\n    tree.addClass(delegate, node, 'visible', false);\n    return true;\n  };\n\n  for (var i = 0; i < nodes.length; ++i) {\n    tree.iterate(delegate, nodes[i], action);\n  }\n};\n\nViewerModelStructurePanel.prototype.setIsolation = function (isolation) {\n\n  // Special case, nothing isolated when array is empty\n  if (isolation.length === 0) {\n    var tree = this.tree;\n    tree.forEachDelegate(function (delegate) {\n\n      var model = delegate.model;\n      var instanceTree = delegate.instanceTree;\n\n      if (!instanceTree)\n      return;\n\n      var rootId = instanceTree.getRootId();\n\n      tree.iterate(delegate, rootId, function (node) {\n        tree.removeClass(delegate, node, 'dim', false);\n        tree.removeClass(delegate, node, 'visible', false);\n        return true;\n      });\n      this.setHidden([rootId], model, false);\n    }.bind(this));\n\n    return;\n  }\n\n  // append missing models into the isolation array\n  var fullyHidden = [];\n  if (isolation.length) {\n    this.tree.forEachDelegate(function (delegate) {\n      var idx = -1;\n      for (var j = 0; j < isolation.length; j++) {\n        if (isolation[j].model === delegate.model) {\n          idx = j;\n          break;\n        }\n      }\n      if (idx === -1) {\n        fullyHidden.push(delegate);\n      }\n    }.bind(this));\n  }\n\n\n  // Process isolation\n  for (var i = 0; i < isolation.length; ++i) {\n\n    var model = isolation[i].model;\n    var instanceTree = model.getData().instanceTree;\n    if (!instanceTree) {\n      continue;\n    }\n    var rootId = instanceTree.getRootId();\n\n    var tree = this.tree;\n    var delegate = tree.getDelegate(model.id);\n\n    tree.iterate(delegate, rootId, function (node) {\n      tree.removeClass(delegate, node, 'dim', false);\n      tree.removeClass(delegate, node, 'visible', false);\n      return true;\n    });\n\n    var nodes = isolation[i].ids;\n    if (nodes.length === 0)\n    continue;\n\n    // If the root is isolated, we don't want to dim anything.\n    //\n    if (nodes.length === 1 && nodes[0] === rootId) {\n      return;\n    }\n\n    this.setHidden([rootId], model, true);\n    this.setHidden(nodes, model, false);\n  }\n\n  // Hide the rest of the models\n  for (var i = 0; i < fullyHidden.length; ++i) {\n\n    var tree = this.tree;\n    var delegate = fullyHidden[i];\n    var model = delegate.model;\n    var instanceTree = delegate.instanceTree;\n    if (!instanceTree) {\n      continue;\n    }\n    var rootId = instanceTree.getRootId();\n\n    tree.iterate(delegate, rootId, function (node) {\n      tree.removeClass(delegate, node, 'dim', false);\n      tree.removeClass(delegate, node, 'visible', false);\n      return true;\n    });\n\n    this.setHidden([rootId], model, true);\n  }\n};\n\n/**\n    * Displays the given nodes as selected in this panel.\n    *\n    * @param {Array} nodes - An array of Autodesk.Viewing.Model nodes to display as selected\n    */\nViewerModelStructurePanel.prototype.setSelection = function (aggregatedSelection)\n{\n  var i, k, parent, model, nodes, delegate, instanceTree;\n  var tree = this.tree;\n\n  // Un-mark the ancestors.\n  //\n  var scene = this.viewer.impl.modelQueue();\n  for (var modelId in this.selectedNodes) {\n\n    model = scene.findModel(parseInt(modelId));\n    nodes = this.selectedNodes[modelId];\n    delegate = tree.getDelegate(modelId);\n    if (!delegate)\n    continue;\n\n    instanceTree = delegate.instanceTree;\n    if (!instanceTree)\n    continue;\n\n    for (k = 0; k < nodes.length; ++k) {\n      parent = instanceTree.getNodeParentId(nodes[i]);\n      while (parent) {\n        tree.removeClass(delegate, parent, 'ancestor-selected');\n        parent = instanceTree.getNodeParentId(parent);\n      }\n    }\n\n    tree.clearSelection(delegate);\n  }\n\n  // Mark the ancestors of the newly selected nodes.\n  //\n  this.selectedNodes = {};\n  for (i = 0; i < aggregatedSelection.length; ++i) {\n    model = aggregatedSelection[i].model;\n    nodes = aggregatedSelection[i].dbIdArray || aggregatedSelection[i].selection;\n\n    delegate = tree.getDelegate(model.id);\n    if (!delegate)\n    continue;\n\n    instanceTree = delegate.instanceTree;\n    if (!instanceTree)\n    continue;\n\n    for (k = 0; k < nodes.length; ++k) {\n      parent = instanceTree.getNodeParentId(nodes[i]);\n      while (parent) {\n        tree.addClass(delegate, parent, 'ancestor-selected');\n        parent = instanceTree.getNodeParentId(parent);\n      }\n    }\n\n    // Mark the newly selected nodes.\n    //\n    tree.setSelection(delegate, nodes);\n\n    // Bookkeeping\n    this.selectedNodes[model.id] = nodes.concat();\n  }\n};\n\n\n\nViewerModelStructurePanel.prototype.scrollToSelection = function (aggregatedSelection) {\n\n  // Grab first selection...\n  var first = aggregatedSelection[0];\n  if (!first)\n  return;\n\n  var model = first.model;\n  var nodes = first.dbIdArray || first.selection;\n\n  var scrollY = this.tree.scrollTo(nodes[0], model);\n\n  var currScroll = this.scrollContainer.scrollTop;\n  this.scrollContainer.scrollTop = scrollY;\n  var endScroll = this.scrollContainer.scrollTop; // scrollTop will get modified due to height constraints.\n  this.scrollContainer.scrollTop = currScroll;\n\n  if (this.options.scrollEaseSpeed > 0) {\n    this.animateScroll(currScroll, endScroll, function (posY) {\n      this.tree.setScroll(posY);\n    }.bind(this));\n  } else {\n    this.scrollContainer.scrollTop = endScroll;\n    this.tree.setScroll(endScroll);\n  }\n};\n\n/**\n    * Invoked by our specialized delegate.\n    */\nViewerModelStructurePanel.prototype.onEyeIcon = function (dbId, model) {\n\n  this.viewer.toggleVisibility(dbId, model);\n  avp.analytics.track('viewer.model_browser', {\n    from: 'Panel',\n    action: 'Toggle Visibility' });\n\n};\n\n/**\n    * Overrides method in base class\n    */\nViewerModelStructurePanel.prototype.onTreeNodeClick = function (tree, node, model, event)\n{\n  if (this._trackNodeClick) {\n    logger.track({ category: 'node_selected', name: 'model_browser_tool' });\n    this._trackNodeClick = false;\n  }\n\n  if (this.isMac && event.ctrlKey) {\n    return;\n  }\n\n  var key = \"click\";\n  if (this.ctrlDown(event)) {\n    key += \"Ctrl\";\n  }\n  if (event.shiftKey) {\n    key += \"Shift\";\n  }\n  if (event.altKey) {\n    key += \"Alt\";\n  }\n\n  var actions = ['toggleOverlayedSelection'];\n  var clickConfig = this.clickConfig[key];\n  if (clickConfig) {\n    actions = clickConfig[\"onObject\"];\n  }\n\n  avp.analytics.track('viewer.model_browser', {\n    from: 'Panel',\n    action: 'Select' });\n\n  this.handleAction(actions, node, model);\n};\n\n/**\n    * Overrides method in base class\n    */\nViewerModelStructurePanel.prototype.onTreeNodeRightClick = function (tree, node, model, event)\n{\n  // Sometimes CTRL + LMB maps to a right click on a mac. Redirect it.\n  if (this.isMac && event.ctrlKey && event.button === 0) {\n    if (this.clickConfig && this.clickConfig[\"clickCtrl\"]) {\n      this.handleAction(this.clickConfig[\"clickCtrl\"][\"onObject\"], node, model);\n    }\n    return null;\n  }\n\n  return this.viewer.contextMenu.show(event);\n};\n\n/**\n    * @private\n    */\nViewerModelStructurePanel.prototype.handleAction = function (actionArray, dbId, model) {\n\n  for (var action in actionArray) {\n    switch (actionArray[action]) {\n      case \"toggleOverlayedSelection\":\n        this.toggleOverlayedSelection(dbId, model);\n        break;\n      case \"toggleMultipleOverlayedSelection\":\n        this.toggleMultipleOverlayedSelection(dbId, model);\n        break;\n      case \"selectOnly\":\n        this.viewer.select(dbId, model);\n        break;\n      case \"deselectAll\":\n        this.viewer.clearSelection();\n        break;\n      case \"selectToggle\":\n        this.viewer.toggleSelect(dbId, model);\n        break;\n      case \"isolate\":\n        this.isolate(dbId, model);\n        break;\n      case \"showAll\":\n        this.viewer.showAll();\n        break;\n      case \"focus\":\n        this.viewer.fitToView();\n        break;\n      case \"hide\":\n        this.viewer.hide(dbId, model);\n        break;\n      case \"show\":\n        this.viewer.show(dbId, model);\n        break;\n      case \"toggleVisibility\":\n        this.viewer.toggleVisibility(dbId, model);\n        break;}\n\n  }\n};\n\n\n/**\n    * Click handler.\n    */\nViewerModelStructurePanel.prototype.toggleOverlayedSelection = function (dbId, model) {\n\n  var modelSelection = this.selectedNodes[model.id];\n  var index = modelSelection ? modelSelection.indexOf(dbId) : -1;\n  this._ignoreScroll = true;\n  if (index === -1) {\n    this.viewer.select(dbId, model);\n    this.viewer.fitToView([dbId], model, false);\n  } else {\n    this.viewer.select([], undefined, model);\n  }\n};\n\n\n/**\n    * Shift Click handlers\n    */\nViewerModelStructurePanel.prototype.toggleMultipleOverlayedSelection = function (dbId, model)\n{\n  var modelSelection = this.selectedNodes[model.id];\n  var index = modelSelection ? modelSelection.indexOf(dbId) : -1;\n  if (index === -1) {\n    if (!modelSelection) {\n      modelSelection = this.selectedNodes[model.id] = [];\n    }\n    modelSelection.push(dbId);\n  } else {\n    modelSelection.splice(index, 1);\n  }\n\n  var selection = [];\n  for (var modelId in this.selectedNodes) {\n    if (this.selectedNodes.hasOwnProperty(modelId)) {\n      var model = this.viewer.impl.findModel(parseInt(modelId));\n      var ids = this.selectedNodes[modelId];\n      selection.push({\n        model: model,\n        ids: ids });\n\n    }\n  }\n  this._ignoreScroll = true;\n  this.viewer.impl.selector.setAggregateSelection(selection);\n\n  var aggregatedSelection = this.viewer.getAggregateSelection();\n  this.viewer.fitToView(aggregatedSelection);\n};\n\n/**\n    * @private\n    */\nViewerModelStructurePanel.prototype.isolate = function (dbId, model) {\n  this.viewer.isolate(dbId, model);\n  this.viewer.fitToView([dbId], model, false);\n\n  // fire show properties event\n  if (model) {\n    var event = {\n      type: et.SHOW_PROPERTIES_EVENT,\n      dbId: dbId,\n      model: model };\n\n    this.viewer.dispatchEvent(event);\n  }\n};\n\n/**\n    * @private\n    */\nViewerModelStructurePanel.prototype.ctrlDown = function (event) {\n  return this.isMac && event.metaKey || !this.isMac && event.ctrlKey;\n};\n\n/**\n    * \n    * @param {*} text \n    * \n    * @returns Array with objects containing { delegate:Delegate, ids:Array }\n    */\nfunction filterIds(text) {\n\n  var tree = this.tree;\n  var searchTerm = text.toLowerCase();\n  var result = [];\n\n  tree.forEachDelegate(function (delegate) {\n    var rootId = delegate.getRootId();\n    var ids = [];\n    tree.iterate(delegate, rootId, function (id) {\n      var idName = delegate.instanceTree && delegate.instanceTree.getNodeName(id);\n      if (idName && idName.toLowerCase().indexOf(searchTerm) !== -1) {\n        ids.push(id);\n      }\n      return true;\n    });\n\n    result.push({ ids: ids, delegate: delegate });\n  });\n\n  avp.analytics.track('viewer.model_browser', {\n    from: 'Panel',\n    action: 'Search' });\n\n\n  return result;\n}","\nimport { ObjectContextMenu } from \"./ObjectContextMenu\";\nimport { logger } from \"../logger/Logger\";\n\n\n/**\n                                            * Constructs a ViewerObjectContextMenu object.\n                                            * @param {Viewer} viewer\n                                            * @constructor\n                                            */\nexport function ViewerObjectContextMenu(viewer) {\n  ObjectContextMenu.call(this, viewer);\n}\n\nViewerObjectContextMenu.prototype = Object.create(ObjectContextMenu.prototype);\nViewerObjectContextMenu.prototype.constructor = ViewerObjectContextMenu;\n\n/**\n                                                                          * Builds the context menu to be displayed.\n                                                                          * @override\n                                                                          * @param {Event} event - Browser event that requested the context menu\n                                                                          * @param {Object} status - Information about nodes: numSelected, hasSelected, hasVisible, hasHidden.\n                                                                          * @returns {?Array} An array of menu items.\n                                                                          */\nViewerObjectContextMenu.prototype.buildMenu = function (event, status) {var _this = this;\n\n  // Context menu varies depending on whether we show 2D or 3D models. If we have neither 2d nor 3d, just don't create it.\n  if (!this.viewer.model) {\n    return;\n  }\n\n  var that = this,\n  menu = [],\n  nav = this.viewer.navigation,\n  is2d = this.viewer.model.is2d();\n  var analytics = Autodesk.Viewing.Private.analytics;\n\n  // the title strings here are added to the viewer.loc.json for localization\n  if (status.hasSelected) {\n    menu.push({\n      title: \"Isolate\",\n      target: function target() {\n        var selection = that.viewer.getAggregateSelection();\n        that.viewer.clearSelection();\n        that.viewer.impl.visibilityManager.aggregateIsolate(selection);\n        logger.track({ name: 'isolate_count', aggregate: 'count' });\n        analytics.track('viewer.object.visibility', {\n          action: 'Isolate' });\n\n      } });\n\n    if (status.hasVisible) {\n      menu.push({\n        title: \"Hide Selected\",\n        target: function target() {\n          var selected = that.viewer.impl.selector.getAggregateSelection();\n          that.viewer.clearSelection();\n          that.viewer.impl.visibilityManager.aggregateHide(selected);\n          analytics.track('viewer.object.visibility', {\n            action: 'Hide Selected' });\n\n        } });\n\n    }\n    if (status.hasHidden) {\n      menu.push({\n        title: \"Show Selected\",\n        target: function target() {\n          // This is such a weird use case. Users can't select hidden nodes.\n          // For this to work, selection must have been done through code.\n          var selected = that.viewer.getSelection();\n          that.viewer.clearSelection();\n          that.viewer.show(selected);\n          analytics.track('viewer.object.visibility', {\n            action: 'Show Selected' });\n\n        } });\n\n    }\n  }\n\n  if (is2d) {\n    menu.push({\n      title: \"Show All Layers\",\n      target: function target() {\n        that.viewer.setLayerVisible(null, true);\n        analytics.track('viewer.object.visibility', {\n          action: 'Show All Layers' });\n\n      } });\n\n  }\n\n  menu.push({\n    title: \"Show All Objects\",\n    target: function target() {\n      that.viewer.showAll();\n      logger.track({ name: 'showall', aggregate: 'count' });\n      analytics.track('viewer.object.visibility', {\n        action: 'Show All Objects' });\n\n    } });\n\n\n\n  // Fit-to-view only work with selections from one model.\n  var aggregateSelection = that.viewer.getAggregateSelection();\n  if (!is2d && aggregateSelection.length === 1 && nav.isActionEnabled('gotoview')) {\n    menu.push({\n      title: \"Focus\",\n      target: function target() {\n        aggregateSelection = that.viewer.getAggregateSelection(); // Get the aggregate selection again\n        if (aggregateSelection.length > 0) {\n          var singleRes = aggregateSelection[0];\n          that.viewer.fitToView(singleRes.selection, singleRes.model);\n        } else if (aggregateSelection.length === 0) {\n          that.viewer.fitToView(); // Fit to whole model, the first one loaded.\n        }\n        logger.track({ name: 'fittoview', aggregate: 'count' });\n      } });\n\n  }\n\n  // Pivot point\n  if (!is2d) {\n    var rect = this.viewer.impl.getCanvasBoundingClientRect();\n    var canvasX = event.clientX - rect.left;\n    var canvasY = event.clientY - rect.top;\n    var res = this.viewer.clientToWorld(canvasX, canvasY, false);\n    if (res) {\n      menu.push({\n        title: \"Pivot\",\n        target: function target() {\n          _this.viewer.navigation.setPivotPoint(res.point);\n        } });\n\n    }\n  }\n\n  if (status.hasSelected) {\n    menu.push({\n      title: \"Clear Selection\",\n      target: function target() {\n        that.viewer.clearSelection();\n        logger.track({ name: 'clearselection', aggregate: 'count' });\n      } });\n\n  }\n\n  return menu;\n};","\nexport function ViewerPanelMixin()\n{\n  /**\n   * Returns the parent's container bounding rectangle.\n   *\n   * @returns {ClientRect} - bounding rectangle of the parent.\n   */\n  this.getContainerBoundingRect = function () {\n    var bounds = this.parentContainer.getBoundingClientRect();\n\n    var toolbarBounds = {\n      height: 0,\n      width: 0,\n      left: 0,\n      bottom: 0,\n      right: 0,\n      top: 0 };\n\n\n    var _document = this.getDocument();\n    var toolbar = _document.getElementsByClassName(\"toolbar-menu\");\n    if (toolbar && toolbar.length > 0) {\n      toolbarBounds = toolbar[0].getBoundingClientRect();\n    }\n\n    // TODO: This assumes that toolbar is horizontal and at the bottom.\n    // Once the toolbar can be positioned somewhere else (top, right, left)\n    // this code will need to be expanded to return the right bounds for each case.\n    return {\n      height: bounds.height - toolbarBounds.height,\n      width: bounds.width,\n      left: bounds.left,\n      bottom: bounds.bottom - toolbarBounds.height,\n      right: bounds.right,\n      top: bounds.top };\n\n  };\n};","\nimport { PropertyPanel } from \"./PropertyPanel\";\nimport { ViewerPanelMixin } from \"./ViewerPanelMixin\";\nimport * as et from \"../application/EventTypes\";\nimport { DockingPanel } from \"./DockingPanel\";\nimport { analytics } from '../analytics';\n\n\n/** @constructor */\nexport function ViewerPropertyPanel(viewer) {\n  this.viewer = viewer;\n  this.setGlobalManager(viewer.globalManager);\n  this.currentNodeIds = [];\n  this.currentModel = null;\n  this.isDirty = true;\n  this.propertyNodeId = null;\n  this.normalTitle = 'Properties';\n  this.loadingTitle = 'Object Properties Loading';\n  this._viewDbId = null;\n\n  this.onProperties = this.onProperties.bind(this);\n  this.onPropError = this.onPropError.bind(this);\n  this.setPropertiesIntoUI = this.setPropertiesIntoUI.bind(this);\n  this._onDisplayUnitPreferenceChanged = this._onDisplayUnitPreferenceChanged.bind(this);\n\n  PropertyPanel.call(this, viewer.container, 'ViewerPropertyPanel', this.loadingTitle);\n};\n\nViewerPropertyPanel.prototype = Object.create(PropertyPanel.prototype);\nViewerPropertyPanel.prototype.constructor = ViewerPropertyPanel;\nViewerPanelMixin.call(ViewerPropertyPanel.prototype);\n\nfunction isSolidWorks(model) {\n  var docNode = model.getDocumentNode();\n  var viewable = docNode && docNode.findViewableParent();\n\n  if (viewable && viewable.name().toLocaleLowerCase().indexOf(\".sld\") !== -1) {\n    return true;\n  }\n\n  return false;\n}\n\nViewerPropertyPanel.prototype._onDisplayUnitPreferenceChanged = function () {\n  this.isDirty = true;\n  var rootId = this.currentModel ? this.currentModel.getRootId() : null;\n  // If a non-root's property is currently displayed, continue showing it\n  if (this.propertyNodeId !== null && this.propertyNodeId !== rootId) {\n    this.requestNodeProperties(this.propertyNodeId);\n  } else {\n    this.requestProperties();\n  }\n};\n\nViewerPropertyPanel.prototype.initialize = function () {\n  PropertyPanel.prototype.initialize.call(this);\n\n  var that = this;\n\n  this.viewer.prefs.addListeners(Autodesk.Viewing.Private.Prefs.DISPLAY_UNITS, this._onDisplayUnitPreferenceChanged);\n\n  this.viewer.prefs.addListeners(Autodesk.Viewing.Private.Prefs.DISPLAY_UNITS_PRECISION, this._onDisplayUnitPreferenceChanged);\n\n  that.addEventListener(that.viewer, et.AGGREGATE_SELECTION_CHANGED_EVENT, function (event) {\n\n    if (event.selections && event.selections.length) {\n      that.currentNodeIds = event.selections[0].dbIdArray;\n      that.currentModel = event.selections[0].model;\n    } else {\n      that.resetCurrentModel();\n    }\n\n    that.isDirty = true;\n    that.requestProperties();\n  });\n\n  // Handles showing properties for the dbIds provided for a model\n  that.addEventListener(that.viewer, et.SHOW_PROPERTIES_EVENT, function (event) {\n    if (event && event.dbId && event.model === that.currentModel) {\n      that.requestNodeProperties(event.dbId);\n    }\n  });\n\n  that.addEventListener(that.viewer, et.HIDE_EVENT, function (e) {\n    that.isDirty = true;\n    that.requestProperties();\n  });\n\n  // Make sure that props are refreshed if instanceTree was not available before.\n  that.addEventListener(that.viewer, et.OBJECT_TREE_CREATED_EVENT, function (e) {\n    if (that.currentModel === e.model) {\n      that.isDirty = true;\n      that.requestProperties();\n    }\n  });\n\n  that.addEventListener(that.viewer, et.SHOW_EVENT, function (e) {\n    that.isDirty = true;\n    that.requestProperties();\n  });\n\n  // Populate the ids with the current selection.\n  //\n  var aggregateSelection = this.viewer.getAggregateSelection();\n  if (aggregateSelection.length) {\n    this.currentModel = aggregateSelection[0].model;\n    this.currentNodeIds = aggregateSelection[0].selection;\n  } else {\n    this.resetCurrentModel();\n  }\n\n};\n\n// Reset current model to the only visible one (or null if there is no unique visible model)\nViewerPropertyPanel.prototype.resetCurrentModel = function () {\n  // If only a single model is visible, show model props by default\n  var visibleModels = this.viewer ? this.viewer.getVisibleModels() : [];\n  if (visibleModels.length === 1) {\n    this.currentModel = visibleModels[0];\n    this.currentNodeIds = [];\n  } else {\n    this.currentModel = null;\n    this.currentNodeIds = [];\n  }\n};\n\nViewerPropertyPanel.prototype.setTitle = function (title, options) {\n  if (!title) {\n    title = 'Object Properties'; // localized by DockingPanel.prototype.setTitle\n    options = options || {};\n    options.localizeTitle = true;\n  }\n  PropertyPanel.prototype.setTitle.call(this, title, options);\n};\n\nViewerPropertyPanel.prototype.setVisible = function (show) {\n  DockingPanel.prototype.setVisible.call(this, show);\n  if (show) {\n    analytics.track('viewer.properties', {\n      action: 'View List' });\n\n  }\n  this.requestProperties();\n};\n\nViewerPropertyPanel.prototype.visibilityChanged = function () {\n  DockingPanel.prototype.visibilityChanged.call(this);\n  if (this.isVisible())\n  this.requestProperties();\n};\n\nViewerPropertyPanel.prototype.requestProperties = function () {\n  if (this.isVisible() && this.isDirty) {\n    if (this.currentModel && this.currentNodeIds.length > 0) {\n      this.requestNodeProperties(this.currentNodeIds[this.currentNodeIds.length - 1]);\n    } else {\n      this.showDefaultProperties();\n    }\n    this.isDirty = false;\n  }\n};\n\n/**\r\n    * Populates property data into the UI.\r\n    * It might fetch additional data for particular dbIds.\r\n    *\r\n    * @param {object} result - Value passed back from the property worker.\r\n    * @private\r\n    */\nViewerPropertyPanel.prototype.onProperties = function (result) {var _this = this;\n\n  // Prevent trying to make changes after dialog was uninitialized.\n  if (!this.viewer || !this.currentModel)\n  return;\n\n  // Ignore callback if outdated: Another id/model may have been selected meanwhile.\n  // Note that that.currentModel may also be null meanwhile if selection was cleared\n  // and the number of visible models is !=1.\n  if (result.dbId !== this.propertyNodeId) {\n    return;\n  }\n\n  // Handle __internalref__ properties to support Solidworks\n  // And for finding Revit sheet properties, which are children\n  // of the root model properties.\n  var internalRefIds = [];\n  var props = result.properties;\n  for (var i = 0, len = props.length; i < len; ++i) {\n    var prop = props[i];\n    if (prop.displayCategory === \"__internalref__\") {\n      internalRefIds.push(prop.displayValue);\n    }\n  }\n\n  var prom;\n  var model = this.currentModel;\n\n  if (model.is3d() && isSolidWorks(model) && internalRefIds.length > 0) {\n    // Solidworks or similar file type containing a Configuration __internalref__\n    // Get the properties of all the internalref nodes and merge them with the properties already fetched.\n    prom = fetchAndMerge(model, internalRefIds, result);\n  } /*else if (model.is2d() && !that.isSelection) {\r\n      // for sheets return only the sheet properties, if we can find them\r\n      // and if it is not a selection\r\n      prom = getSheetProperties(model, internalRefIds);\r\n    }*/else\n    {\n      //All other cases, just return the node properties\n      prom = Promise.resolve(result);\n    }\n\n  prom.then(this.setPropertiesIntoUI).\n  catch(function () {\n    _this.setProperties([]);\n    _this.highlight('');\n    _this.resizeToContent();\n    _this.respositionPanel();\n  });\n\n};\n\n/**\r\n    * Helper method to update UI panel with property data.\r\n    *\r\n    * @param {object} result - Value passed back from the property worker.\r\n    *\r\n    * @private\r\n    */\nViewerPropertyPanel.prototype.setPropertiesIntoUI = function (result) {\n  var title = result.name || this.normalTitle;\n  var doLocalize = !result.name;\n  this.setTitle(title, { localizeTitle: doLocalize });\n  if ('name' in result && result.properties) {\n    // name is displayed in the title,but ctrl/cmd+c doesn't work there\n    // So we include it again in the property list\n    result.properties.splice(0, 0, {\n      \"displayName\": 'Name',\n      \"displayValue\": result.name,\n      \"displayCategory\": null,\n      \"attributeName\": 'Name',\n      \"type\": 20,\n      \"units\": null,\n      \"hidden\": false,\n      \"precision\": 0 });\n\n  }\n  this.setProperties(result.properties);\n  this.highlight(this.viewer.searchText);\n\n  this.resizeToContent();\n  this.respositionPanel();\n};\n\n/**\r\n    * The on error callback for the getProperties function.\r\n    * This will set the property panel for models that do not contain any properties.\r\n    * @private\r\n    */\nViewerPropertyPanel.prototype.onPropError = function () {\n  this.setTitle(this.normalTitle, { localizeTitle: true });\n  this.showNoProperties();\n};\n\n/**\r\n    * Requests properties from the property worker and populates the result into the UI.\r\n    * \r\n    * @private\r\n    */\nViewerPropertyPanel.prototype.requestNodeProperties = function (nodeId) {var _this2 = this;\n  var model = this.currentModel;\n  this.propertyNodeId = nodeId;\n  model.getProperties2(\n  nodeId,\n  function (results) {\n    if (!_this2.viewer || model !== _this2.currentModel)\n    return;\n    _this2.onProperties(results);\n  },\n  this.onPropError);\n\n};\n\n// backwards compatibility. Remove in v8.0.\nViewerPropertyPanel.prototype.setNodeProperties = ViewerPropertyPanel.prototype.requestNodeProperties;\n\n/**\r\n                                                                                                        * Requests properties for the specified BubbleNode.\r\n                                                                                                        * @param {Autodesk.Viewing.BubbleNode} bubbleNode - the model's bubble node.\r\n                                                                                                        */\nViewerPropertyPanel.prototype.requestViewProperties = function (bubbleNode) {var _this3 = this;\n\n  // Set the node properties to the cached view dbid.\n  if (this._viewDbId !== null) {\n    this.requestNodeProperties(this._viewDbId);\n    return;\n  }\n\n  var model = this.currentModel;\n  var rootId = model.getRootId();\n  this.propertyNodeId = rootId;\n\n  model.getProperties2(rootId, function (result) {\n\n    // Prevent trying to make changes after dialog was uninitialized.\n    if (!_this3.viewer) return;\n    if (model !== _this3.currentModel) return;\n\n    _this3._viewDbId = rootId;\n    var docName = bubbleNode.name();\n    var isSheet = bubbleNode.isSheet();\n    var props = result.properties;\n    var viewIds = [];\n    var sheetIds = [];\n\n    // Generate an array for the View and the Sheet properties\n    for (var i = 0; i < props.length; ++i) {\n      var prop = props[i];\n      if (prop.displayName === 'View') {\n        viewIds.push(prop.displayValue);\n      }\n\n      if (prop.displayName === 'Sheet') {\n        sheetIds.push(prop.displayValue);\n      }\n    }\n\n    var viewableIds = isSheet ? sheetIds : viewIds;\n\n    // Set the properties to the root id if no view or sheet properties were found.\n    if (viewableIds.length === 0) {\n      _this3.onProperties(result);\n      return;\n    }\n\n    // Get the properties associated with the view dbIds or sheet dbIds.\n    var that = _this3;\n    model.getBulkProperties2(viewableIds, { propFilter: ['name', 'dbId'], ignoreHidden: true }, function (res) {\n      var foundIds = [];\n      for (var _i = 0; _i < res.length; ++_i) {\n        if (docName.indexOf(res[_i].name) !== -1) {\n          var nodeId = res[_i].dbId;\n          // Views will not have duplicate names.\n          if (!isSheet) {\n            // cache the view dbid\n            that._viewDbId = nodeId;\n            that.requestNodeProperties(nodeId);\n            return;\n          }\n          // There might be multiple sheets with the same name\n          foundIds.push(nodeId);\n        }\n      }\n\n      if (foundIds.length === 0) {\n        that.onProperties(result);\n        return;\n      }\n\n      // Make sure that the sheet number property matches.\n      // There might be duplicate sheet names, the only difference will be the sheet number.\n      getSheetProperties(model, foundIds, docName).then(function (prop) {\n        if (prop && prop.dbId && prop.dbId !== rootId) {\n          that._viewDbId = prop.dbId;\n          that.requestNodeProperties(prop.dbId);\n        } else {\n          that.onProperties(result);\n        }\n      });\n    });\n  }, this.onPropError);\n};\n\n/*\r\n   Call this method when the current model is a sheet and its default properties are required.\r\n   If the sheet could not be found, result is null.\r\n    */\nfunction getSheetProperties(model, dbIds, sheetName) {\n  return new Promise(function (resolve, reject) {\n    // given sheet name of the 2d model\n    sheetName = sheetName || model.myData.metadata.title;\n    model.getBulkProperties2(dbIds, { ignoreHidden: true }, function (bulkResults) {\n\n      for (var x = 0, xLen = bulkResults.length; x < xLen; ++x) {\n        var result = bulkResults[x];\n        // property name occurs in the sheet name\n        if (result.name && sheetName.indexOf(result.name) !== -1) {\n\n          for (var i = 0, len = result.properties.length; i < len; ++i) {\n            var prop = result.properties[i];\n            // sheet number additionally occurs in the sheet name\n            if (prop.displayName === 'Sheet Number' && sheetName.indexOf(prop.displayValue) !== -1) {\n              return resolve(result);\n            }\n          }\n        }\n      }\n\n      return resolve(null);\n    });\n  });\n}\n\nfunction fetchAndMerge(model, dbIds, previousResult) {\n  return new Promise(function (resolve, reject) {\n    model.getBulkProperties2(dbIds, { ignoreHidden: true }, function (bulkResults) {\n      for (var x = 0, xLen = bulkResults.length; x < xLen; ++x) {\n        var result = bulkResults[x];\n        // Merge additional properties \n        for (var i = 0, len = result.properties.length; i < len; ++i) {\n          var prop = result.properties[i];\n          // Only merge new properties\n          var isNewProperty = true;\n          for (var j = 0, len2 = previousResult.properties.length; j < len2; ++j) {\n            if (previousResult.properties[j].displayName === prop.displayName) {\n              isNewProperty = false;\n              j = len2; // aka: break;\n            }\n          }\n          if (isNewProperty) {\n            previousResult.properties.push(prop);\n          }\n        }\n      }\n      resolve(previousResult);\n    });\n  });\n}\n\nViewerPropertyPanel.prototype.respositionPanel = function () {\n\n  if (!this.isVisible())\n  return;\n\n  // Does the property panel overlap the mouse position? If so, then reposition\n  // the property panel. Prefer a horizontal vs. vertical reposition.\n  //\n  var toolController = this.viewer.toolController,\n  mx = toolController.lastClickX,\n  my = toolController.lastClickY,\n  panelRect = this.container.getBoundingClientRect(),\n  px = panelRect.left,\n  py = panelRect.top,\n  pw = panelRect.width,\n  ph = panelRect.height,\n  canvasRect = this.viewer.impl.getCanvasBoundingClientRect(),\n  cx = canvasRect.left,\n  cy = canvasRect.top,\n  cw = canvasRect.width,\n  ch = canvasRect.height;\n\n  if (px <= mx && mx < px + pw && py <= my && my < py + ph) {\n    if (mx < px + pw / 2 && mx + pw < cx + cw) {\n      this.container.style.left = Math.round(mx - cx) + 'px';\n      this.container.dockRight = false;\n    } else if (cx <= mx - pw) {\n      this.container.style.left = Math.round(mx - cx - pw) + 'px';\n      this.container.dockRight = false;\n    } else if (mx + pw < cx + cw) {\n      this.container.style.left = Math.round(mx - cx) + 'px';\n      this.container.dockRight = false;\n    } else if (my + ph < cy + ch) {\n      this.container.style.top = Math.round(my - cy) + 'px';\n      this.container.dockBottom = false;\n    } else if (cy <= my - ph) {\n      this.container.style.top = Math.round(my - cy - ph) + 'px';\n      this.container.dockBottom = false;\n    }\n  }\n};\n\nViewerPropertyPanel.prototype.showDefaultProperties = function () {\n  var rootId = this.currentModel ? this.currentModel.getRootId() : null;\n  if (rootId) {\n    var docNode = this.currentModel.getDocumentNode();\n    if (docNode && !docNode.isMasterView()) {\n      this.requestViewProperties(docNode);\n    } else {\n      this.requestNodeProperties(rootId);\n    }\n\n  } else {\n    this.propertyNodeId = null;\n    this.setTitle(this.normalTitle, { localizeTitle: true }); // localized by DockingPanel.prototype.setTitle\n    PropertyPanel.prototype.showDefaultProperties.call(this);\n  }\n};\n\nViewerPropertyPanel.prototype.areDefaultPropertiesShown = function () {\n  if (!this.currentModel)\n  return false;\n  var rootId = this.currentModel.getRootId();\n  return this.propertyNodeId === rootId;\n};\n\nViewerPropertyPanel.prototype.uninitialize = function () {\n  PropertyPanel.prototype.uninitialize.call(this);\n\n  this.viewer.prefs.removeListeners(Autodesk.Viewing.Private.Prefs.DISPLAY_UNITS, this._onDisplayUnitPreferenceChanged);\n  this.viewer.prefs.removeListeners(Autodesk.Viewing.Private.Prefs.DISPLAY_UNITS_PRECISION, this._onDisplayUnitPreferenceChanged);\n\n  this.viewer = null;\n  this._viewDbId = null;\n  this.currentModel = null;\n  this.propertyNodeId = null;\n  this.currentNodeIds = null;\n};\n\nViewerPropertyPanel.prototype.onCategoryClick = function (category, event) {\n  PropertyPanel.prototype.onCategoryClick.call(this, category, event);\n  this.resizeToContent();\n};\n\nViewerPropertyPanel.prototype.onCategoryIconClick = function (category, event) {\n  PropertyPanel.prototype.onCategoryIconClick.call(this, category, event);\n  this.resizeToContent();\n};","// extracted by mini-css-extract-plugin","\nimport { SettingsPanel } from \"./SettingsPanel\";\nimport * as et from \"../application/EventTypes\";\nimport { logger } from \"../logger/Logger\";\nimport { LightPresets } from \"../application/LightPresets\";\nimport { i18n } from \"../globalization/i18next\";\nimport { isMobileDevice, touchStartToClick } from \"../compat\";\nimport { ViewerPanelMixin } from \"./ViewerPanelMixin\";\nimport { LightPresetThumbnails } from \"./LightPresetThumbnails\";\nimport { debounce } from \"../../thirdparty/lodash/lodash.custom\";\n\nvar av = Autodesk.Viewing;\nvar avp = Autodesk.Viewing.Private;\n\n/**\n                                     * Viewer3dSettings Tabs.\n                                     *\n                                     * These constants are used to define the tabs in the ViewerSettingsPanel.\n                                     *\n                                     * @enum {number}\n                                     * @readonly\n                                     */\nexport var ViewerSettingTab = {\n  Navigation: \"navigationtab\",\n  Configuration: \"performancetab\",\n  Appearance: \"appearance\",\n  Environment: \"environment\" };\n\n\nvar viewerSettingsPanelInstanceCnt = 0;\n\n/**\n                                         * ViewerSettingsPanel\n                                         * This is a panel for displaying the settings for the viewer.\n                                         * @class\n                                         *\n                                         * @param {Autodesk.Viewing.Viewer3D} viewer - the parent viewer\n                                         * @param {string} model - whether it is 3d or 2d mode (acceptable strings: \"2d\", \"3d\")\n                                         * @constructor\n                                         */\nexport function ViewerSettingsPanel(viewer, model) {\n\n  this.viewer = viewer;\n\n  this.is3dMode = !model.is2d();\n  this.visible = false;\n\n  // Keeps track of external registered buttons.\n  this._externalButtonIds = [];\n  this._externalButtonsLabel = null;\n\n  SettingsPanel.call(this, viewer.container, 'ViewerSettingsPanel' + viewer.id + '-' + viewerSettingsPanelInstanceCnt++, 'Settings',\n  { width: 400, addFooter: false, heightAdjustment: 50 /*title-bar*/ + 40 /*tab-bar*/ + 20 /*footer*/ });\n  this.container.classList.add('viewer-settings-panel');\n  this.setGlobalManager(viewer.globalManager);\n\n\n  this.addTab(ViewerSettingTab.Configuration, \"Configuration\", { className: \"performance\" });\n  this.addTab(ViewerSettingTab.Navigation, \"Navigation\", { className: \"navigation\" });\n  this.addTab(ViewerSettingTab.Appearance, \"Appearance\", { className: \"appearance\" });\n  if (this.is3dMode) {\n    this.addTab(ViewerSettingTab.Environment, \"Environment\", { className: \"environment\" });\n  }\n  if (!this.is3dMode) {\n    this.container.classList.add('for-2d-model');\n  }\n\n  this.createRestoreDefaultSettingsButton();\n\n  this.modelPreferenceCount = 0;\n  this.createNavigationPanel();\n  this.createConfigurationPanel();\n  this.createAppearancePanel();\n\n  if (this.modelPreferenceCount) {\n    logger.log('Model locked (' + this.modelPreferenceCount + ') render settings in UI.');\n  }\n  // Setting Configuration as the default tab\n  this.selectTab(ViewerSettingTab.Configuration);\n\n  this.footer = this.createFooter();\n  this.createVersionLabel(this.footer);\n\n  // Add events\n  this.syncUI = this.syncUI.bind(this);\n  viewer.addEventListener(et.RESTORE_DEFAULT_SETTINGS_EVENT, this.syncUI);\n  viewer.addEventListener(et.VIEWER_STATE_RESTORED_EVENT, this.syncUI);\n\n  this.sendAnalyticsDebounced = debounce(function (name, value) {\n    avp.analytics.track('viewer.settings.changed', {\n      setting_name: name,\n      setting_value: value });\n\n  }, 500);\n};\n\nViewerSettingsPanel.prototype = Object.create(SettingsPanel.prototype);\nViewerSettingsPanel.prototype.constructor = ViewerSettingsPanel;\nViewerPanelMixin.call(ViewerSettingsPanel.prototype);\n\n/**\n                                                       * Clean up when the viewer setting  is about to be removed.\n                                                       * @override\n                                                       */\nViewerSettingsPanel.prototype.uninitialize = function () {\n  if (this.viewer) {\n    if (this._onBgEnvironmentChange && this._onBgEnvironmentReset) {\n      this.viewer.prefs.removeListeners(avp.Prefs3D.LIGHT_PRESET, this._onBgEnvironmentChange, this._onBgEnvironmentReset);\n      this._onBgEnvironmentChange = null;\n      this._onBgEnvironmentReset = null;\n    }\n    this.viewer.removeEventListener(et.RESTORE_DEFAULT_SETTINGS_EVENT, this.syncUI);\n    this.viewer.removeEventListener(et.VIEWER_STATE_RESTORED_EVENT, this.syncUI);\n  }\n  this.viewer = null;\n  SettingsPanel.prototype.uninitialize.call(this);\n  this.envSelect = null;\n};\n\n\nViewerSettingsPanel.prototype.setVisible = function (show) {\n  this.visible = show;\n  SettingsPanel.prototype.setVisible.call(this, show);\n  show && this.sizeToContent();\n\n  if (show) {\n    this.createEnvironmentPanel();\n  }\n};\n\n/**\n    * Creates a checkbox element and adds it to the given tab.\n    *\n    * @param {number} tabId - tab id\n    * @param {string} description - the text associated with the checkbox\n    * @param {boolean} initialState - initial value for the checkbox (checked or not)\n    * @param {function} onchange - callback that is called when the checkbox is changed\n    * @param {string} saveKey - name of the preference associated with this checkbox.\n    * @returns {string} - it returns the checkbox element.\n    *\n    */\nViewerSettingsPanel.prototype.addCheckbox = function (tabId, name, description, initialState, onchange, saveKey)\n{\n  var viewer = this.viewer;\n\n  // Use the stored settings or defaults\n  var storedState = viewer.prefs[saveKey];\n  initialState = typeof storedState === 'boolean' ? storedState : initialState;\n\n  function onChangeCB(checked) {\n    if (saveKey) {\n      viewer.prefs.set(saveKey, checked);\n      avp.analytics.track('viewer.settings.changed', {\n        setting_name: saveKey,\n        setting_value: checked });\n\n    }\n    onchange(checked);\n  }\n\n  var checkboxId = SettingsPanel.prototype.addCheckbox.call(this, tabId, name, initialState, onChangeCB, description);\n  var checkBoxElem = this.getControl(checkboxId);\n  checkBoxElem.saveKey = saveKey;\n\n  if (saveKey) {\n    viewer.prefs.addListeners(saveKey, function (value) {\n      checkBoxElem.setValue(value);\n    }, function (value) {\n      checkBoxElem.setValue(value);\n      onchange(value);\n    });\n  } else\n  {\n    checkBoxElem.sliderRow.classList.add('logical-group');\n  }\n\n  if (viewer.prefs.hasTag(saveKey, 'no-storage')) {\n    checkBoxElem.sliderRow.classList.add('no-storage');\n    this.modelPreferenceCount++;\n  }\n  return checkboxId;\n};\n\n/*\n    * @param {string} tabId - Tab to add the new control\n    * @param {string} caption - The text associated with the dropdown\n    * @param {array} items - List of items for the menu\n    * @param {array} values - values corresponding to each item in items\n    * @param {number} initialItemIndex - Initial choice.\n    * @param {function} onchange - Callback that is called when the menu selection is changed.\n    * @param {string} preferenceKey - name of the preference associated with this dropdown.\n    * @param {object|undefined} options - Additional options:\n    * - insertAtIndex - index at which to insert a new drop down menu\n    * @returns {string} ID of a new control.\n   */\nViewerSettingsPanel.prototype.addDropDownMenu = function (tabId, caption, items, values, initialItemIndex, onchange, preferenceKey, options)\n{\n  var viewer = this.viewer;\n\n  if (preferenceKey) {\n    // initial value is from preference\n    initialItemIndex = values.indexOf(viewer.prefs.get(preferenceKey));\n  }\n\n  // wrapper to set the preference\n  function onChangeCB(evt) {\n    if (preferenceKey) {\n      viewer.prefs.set(preferenceKey, values[evt.detail.value]);\n      avp.analytics.track('viewer.settings.changed', {\n        setting_name: preferenceKey,\n        setting_value: values[evt.detail.value] });\n\n    }\n    onchange && onchange(evt);\n  }\n\n  var dropDownId = SettingsPanel.prototype.addDropDownMenu.call(this, tabId, caption, items, initialItemIndex, onChangeCB, options);\n  var dropDownElem = this.getControl(dropDownId);\n\n  if (preferenceKey) {\n    viewer.prefs.addListeners(preferenceKey, function (value) {\n      dropDownElem.setSelectedIndex(values.indexOf(value));\n    }, function (value) {\n      dropDownElem.setSelectedIndex(values.indexOf(value));\n      onchange && onchange(value);\n    });\n  } else\n  {\n    dropDownElem.sliderRow.classList.add('logical-group');\n  }\n\n  if (viewer.prefs.hasTag(preferenceKey, 'no-storage')) {\n    dropDownElem.sliderRow.classList.add('no-storage');\n    this.modelPreferenceCount++;\n  }\n  return dropDownId;\n};\n\n/**\n    * Creates a row and a slider element and adds it to the given tab.\n    *\n    * @param {number} tabId - tab id\n    * @param {string} caption - the caption associated with the slider\n    * @param {string} description - the text associated with the slider\n    * @param {boolean} initialValue - initial value for the slider (checked or not)\n    * @param {function} onchange - callback that is called when the slider is changed\n    * @param {string} saveKey - name of the preference associated with this slider.\n    * @returns {string[]} - it returns the row and slider control ids.\n    */\nViewerSettingsPanel.prototype.addSliderV2 = function (tabId, caption, description, min, max, initialValue, onchange, options, saveKey)\n{\n  var viewer = this.viewer;\n\n  // Use the stored settings or defaults\n  var storedState = viewer.prefs[saveKey];\n  initialValue = typeof storedState === 'number' ? storedState : initialValue;\n\n  if (saveKey && !viewer.prefs.hasOwnProperty(saveKey)) {\n    // Add the preferences.\n    viewer.prefs.add(saveKey, initialValue, ['2d', '3d']);\n  }\n\n  function onChangeCB(event) {\n    var value = typeof event === 'number' ? event : Number(event.detail.value);\n    if (saveKey) {\n      viewer.prefs.set(saveKey, value);\n    }\n    onchange(value);\n  }\n\n  var sliderId = SettingsPanel.prototype.addSliderV2.call(this, tabId, caption, description, min, max, initialValue, onChangeCB, options);\n  var sliderElem = this.getControl(sliderId[1]);\n  sliderElem.saveKey = saveKey;\n\n  if (saveKey) {\n    viewer.prefs.addListeners(saveKey, function (value) {\n      sliderElem.setValue(value);\n    }, function (value) {\n      sliderElem.setValue(value);\n      onchange(value);\n    });\n  } else\n  {\n    sliderElem.sliderRow.classList.add('logical-group');\n  }\n\n  if (viewer.prefs.hasTag(saveKey, 'no-storage')) {\n    sliderElem.sliderRow.classList.add('no-storage');\n    this.modelPreferenceCount++;\n  }\n  return sliderId;\n};\n\n/**\n    * @private\n    */\nfunction generateEnvThumbnail(generator, image, preset) {\n  generator.createThumbnail(preset).then(function (url) {\n    image.src = url;\n    image.onload = function () {\n      URL.revokeObjectURL(url);\n    };\n  });\n}\n\nViewerSettingsPanel.prototype.addGrid = function (caption, parentTable, items, initialItemIndex, onClick, saveKey) {var _this = this;\n\n  var table = parentTable;\n\n  var _document = this.getDocument();\n  var envContainer = _document.createElement(\"div\");\n  envContainer.classList.add(\"environments-container\");\n  table.appendChild(envContainer);\n\n  var envRow = _document.createElement(\"div\");\n  envRow.classList.add(\"environments-lighting-table\");\n  envContainer.appendChild(envRow);\n\n  var generator = new LightPresetThumbnails(42, 26);\n  generator.setGlobalManager(this.viewer.globalManager);\n\n  for (var i = 0; i < items.length; i++) {\n\n    var preset = items[i];\n\n    var cell = _document.createElement(\"div\");\n    cell.classList.add(\"settings-environment-cell\");\n    cell.index = i;\n\n    var image = _document.createElement(\"img\");\n    image.classList.add(\"settings-environment-image\");\n    generateEnvThumbnail(generator, image, preset);\n\n    cell.appendChild(image);\n\n    var name = _document.createElement(\"span\");\n    name.textContent = i18n.translate(preset.name);\n    name.classList.add(\"settings-environment-name\");\n    name.setAttribute('data-i18n', preset.name);\n    cell.appendChild(name);\n\n    cell.addEventListener(\"click\", function () {\n      onClick(this.index);\n    });\n\n    envRow.appendChild(cell);\n  }\n\n  // Update environment selection\n  this._onBgEnvironmentChange = function () {\n    _this.updateEnvironmentSelection();\n  };\n  this._onBgEnvironmentReset = function () {\n    onClick(_this.viewer.prefs.lightPreset);\n    _this.updateEnvironmentSelection();\n  };\n  this.viewer.prefs.addListeners(saveKey, this._onBgEnvironmentChange, this._onBgEnvironmentReset);\n\n  this.updateEnvironmentSelection();\n  return envRow;\n};\n\n\nViewerSettingsPanel.prototype.updateEnvironmentSelection = function () {\n  if (!this.is3dMode) {\n    return;\n  }\n\n  if (!this.envTabCreated)\n  return;\n\n  var index = this.viewer.prefs.lightPreset;\n\n  // Get the index of the lightPreset name\n  // This is done because the Prefs3D.LIGHT_PRESET can either be a string or an integer.\n  if (typeof index === \"string\") {\n    // Create an array of light preset names\n    var indices = LightPresets.map(function (lightObj) {return lightObj.name;});\n    // Set the index to \n    index = indices.indexOf(index);\n  }\n  var cells = this.gridTable.querySelectorAll(\".settings-environment-cell\");\n  for (var j = 0; j < cells.length; j++) {\n    if (cells[j].index === index) {\n      cells[j].classList.add(\"border-select\");\n    } else {\n      cells[j].classList.remove(\"border-select\");\n    }\n  }\n};\n\n/**\n    * Removes an option from the given tab.\n    *\n    * @param {HTMLElement} checkBoxElem - checkbox to remove.\n    * @returns {boolean} - True if the checkbox was removed.\n    */\nViewerSettingsPanel.prototype.removeCheckbox = function (checkBoxElem)\n{\n  this.viewer.prefs.removeListeners(checkBoxElem.saveKey);\n  this.removeEventListener(checkBoxElem, \"change\", checkBoxElem.changeListener);\n\n  return SettingsPanel.prototype.removeCheckbox.call(this, checkBoxElem);\n};\n\n/**\n    *  Populates the navigation tab with the appropriate checkboxes.\n    */\nViewerSettingsPanel.prototype.createNavigationPanel = function ()\n{\n  var viewer = this.viewer;\n  var navTab = ViewerSettingTab.Navigation;\n  var dolly = viewer.toolController.getTool('dolly');\n\n  if (this.is3dMode) {\n\n    this.addLabel(navTab, \"ViewCube\");\n\n    this.addCheckbox(navTab, \"Show ViewCube\", \"Toggles availability of the ViewCube navigation control\", true, function (checked) {\n      viewer.getExtension(\"Autodesk.ViewCubeUi\", function (ext) {\n        ext.displayViewCube(checked);\n      });\n    }, \"viewCube\");\n\n    if (!isMobileDevice()) {\n      this.addCheckbox(navTab, \"ViewCube acts on pivot\", \"When enabled, the ViewCube orbits the view around the active pivot point When disabled, it orbits around the center of the view\", false, function (checked) {\n        viewer.setUsePivotAlways(checked);\n      }, \"alwaysUsePivot\");\n    }\n\n    this.addLabel(navTab, \"Orbit\");\n\n    this.addCheckbox(navTab, \"Fusion style orbit\", \"Enables Fusion-style orbit overlay and gives the ability to lock orbit axis\", false, function (checked) {\n      if (checked)\n      viewer.loadExtension('Autodesk.Viewing.FusionOrbit', null);else\n\n      viewer.unloadExtension('Autodesk.Viewing.FusionOrbit', null);\n    }, \"fusionOrbit\");\n\n    this.addCheckbox(navTab, \"Orbit past world poles\", \"Allows view rotation to continue past the model’s North Pole\", true, function (checked) {\n      viewer.setOrbitPastWorldPoles(checked);\n    }, \"orbitPastWorldPoles\");\n\n    this.addLabel(navTab, \"Zoom\");\n\n    if (!isMobileDevice()) {\n      this.addCheckbox(navTab, \"Zoom towards pivot\", \"When disabled, zooming operations are centered at the current cursor location\", false, function (checked) {\n        viewer.setZoomTowardsPivot(checked);\n      }, \"zoomTowardsPivot\");\n\n      this.addCheckbox(navTab, \"Reverse mouse zoom direction\", \"Toggles direction of zooming in and out\", false, function (checked) {\n        viewer.setReverseZoomDirection(checked);\n      }, \"reverseMouseZoomDir\");\n\n      this.scrollSpeed = initScrollSpeed.call(this);\n    }\n\n    this.dragSpeed = initDragSpeed.call(this);\n\n    // This label should probably be called something else for mobile.\n    this.addLabel(navTab, \"Mouse\");\n    if (!isMobileDevice()) {\n      this.addCheckbox(navTab, \"Left handed mouse setup\", \"Swaps the buttons on the mouse\", false, function (checked) {\n        viewer.setUseLeftHandedInput(checked);\n      }, \"leftHandedMouseSetup\");\n\n      this.addCheckbox(navTab, \"Set pivot with left mouse button\", \"Change left-click behavior to set new pivot point (overrides select object)\", false, function (checked) {\n        viewer.setClickToSetCOI(checked);\n      }, \"clickToSetCOI\");\n    }\n    this.addCheckbox(navTab, \"Open properties on select\", \"Always show properties upon selecting object\", true, function (checked) {\n      viewer.prefs.set('openPropertiesOnSelect', checked);\n    }, \"openPropertiesOnSelect\");\n  }\n\n  if (!this.is3dMode) {\n\n    this.addLabel(navTab, \"Zoom\");\n\n    this.addCheckbox(navTab, \"Reverse mouse zoom direction\", \"Toggles direction of zooming in and out\", false, function (checked) {\n      viewer.setReverseZoomDirection(checked);\n    }, \"reverseMouseZoomDir\");\n\n    if (!isMobileDevice()) {\n      this.scrollSpeed = initScrollSpeed.call(this);\n    }\n\n    this.dragSpeed = initDragSpeed.call(this);\n\n    this.addLabel(navTab, \"Mouse\");\n\n    this.addCheckbox(navTab, \"Open properties on select\", \"Always show properties upon selecting object\", true, function (checked) {\n      viewer.prefs.set('openPropertiesOnSelect', checked);\n    }, \"openPropertiesOnSelect\");\n\n    if (!isMobileDevice()) {\n      this.addCheckbox(navTab, \"Left handed mouse setup\", \"Swaps the buttons on the mouse\", false, function (checked) {\n        viewer.setUseLeftHandedInput(checked);\n      }, \"leftHandedMouseSetup\");\n    }\n\n  }\n\n  // Creates the drag speed slider\n  function initDragSpeed() {var _this2 = this;\n    return this.addSliderV2(navTab, 'Drag Speed', 'Changes sensitivity of mouse movement with the zoom tool', 5, 300, dolly.getDollyDragScale(),\n    function (value) {\n      dolly.setDollyDragScale(value);\n      _this2.sendAnalyticsDebounced('Drag Speed', value);\n    },\n    { step: 5 }, 'zoomDragSpeed')[1];\n  }\n\n  // Creates the scroll speed slider\n  function initScrollSpeed() {var _this3 = this;\n    return this.addSliderV2(navTab, 'Scroll Speed', 'Changes sensitivity of the mouse scroll wheel when zooming', 0.1, 3.0, dolly.getDollyScrollScale(),\n    function (value) {\n      dolly.setDollyScrollScale(value);\n      _this3.sendAnalyticsDebounced('Scroll Speed', value);\n    }, { step: 0.1 }, 'zoomScrollSpeed')[1];\n  }\n};\n\n/**\n    * Adds a button to the configuration tab. Invokes a callback when end-users click on the button.\n    * @param {string} label - Button's user-facing text\n    * @param {function} onClickCb - Callback that will be called when the tool is clicked.\n    * @returns {string} An identifier required to remove the button from the panel.\n    */\nViewerSettingsPanel.prototype.addConfigButton = function (label, onClickCb) {var _this4 = this;\n\n  if (!onClickCb)\n  throw new Error('Must register a function callback.');\n\n  // Add the Tools label to the Configuration tab\n  if (!this._externalButtonsLabel)\n  this._externalButtonsLabel = this.addLabel(ViewerSettingTab.Configuration, 'More');\n\n  // Add button\n  var btnId = this.addButton(ViewerSettingTab.Configuration, label);\n  var btn = this.getControl(btnId);\n  btn.setOnClick(function () {\n    _this4.setVisible(false);\n    onClickCb();\n  });\n  this._externalButtonIds.push(btnId);\n  return btnId;\n};\n\n/**\n    * Removes a config button from the Configuration tab.\n    * @param {string} buttonId - Identifier obtained via {@link #addConfigButton}.\n    * @returns {boolean} True if the button was removed.\n    */\nViewerSettingsPanel.prototype.removeConfigButton = function (buttonId) {\n\n  var index = this._externalButtonIds.indexOf(buttonId);\n  if (index === -1)\n  return false;\n\n  var btn = this.getControl(buttonId); // btn should always be present at this stage.\n  if (!btn)\n  return false;\n\n  this.removeControl(btn);\n  this._externalButtonIds.splice(index, 1);\n\n  // Remove label when no config buttons are present\n  if (this._externalButtonIds.length === 0 && this._externalButtonsLabel !== null) {\n    this._externalButtonsLabel.removeFromParent();\n    this._externalButtonsLabel = null;\n  }\n  return true;\n};\n\n/** Populates the Configuration tab with the appropriate checkboxes.\n    *\n    */\nViewerSettingsPanel.prototype.createConfigurationPanel = function () {\n  var viewer = this.viewer;\n  var configTab = ViewerSettingTab.Configuration;\n  var table = this.tablesContainer.childNodes[0];\n\n\n  if (this.is3dMode) {\n\n    this.addLabel(configTab, \"Performance Optimization\");\n\n    this.optimizeNavigationhkBoxId = this.addCheckbox(configTab, \"Smooth navigation\", \"Provides faster response(but degrades quality) while navigating\",\n    isMobileDevice(), function (checked) {\n      viewer.setOptimizeNavigation(checked);\n    }, \"optimizeNavigation\");\n\n    this.progressiveRenderChkBoxId = this.addCheckbox(configTab, \"Progressive display\", \"Shows incremental updates of the view and allows for more responsive interaction with the model (some elements may flicker) This improves perceived waiting time\",\n    true, function (checked) {\n      viewer.setProgressiveRendering(checked);\n    }, \"progressiveRendering\");\n\n    this.addLabel(configTab, \"Display\");\n\n    this.ghosthiddenChkBoxId = this.addCheckbox(configTab, \"Ghost hidden objects\", \"Leave hidden objects slightly visible\",\n    true, function (checked) {\n      viewer.setGhosting(checked);\n    }, \"ghosting\");\n\n    this.displayLinesId = this.addCheckbox(configTab, \"Display Lines\", \"Toggles display of line objects\", true, function (checked) {\n      viewer.hideLines(!checked);\n    }, \"lineRendering\");\n\n\n    this.displayPointsId = this.addCheckbox(configTab, \"Display Points\", \"Toggles display of point objects\", true, function (checked) {\n      viewer.hidePoints(!checked);\n    }, \"pointRendering\");\n\n\n    this.displayEdgesId = this.addCheckbox(configTab, \"Display edges\", \"Shows outline of model surfaces\", false, function (checked) {\n      viewer.setDisplayEdges(checked);\n    }, \"edgeRendering\");\n\n  }\n  if (!this.is3dMode) {\n    // 2D only\n\n    this.addLabel(configTab, \"Performance Optimization\");\n\n    this.progressiveRenderChkBoxId = this.addCheckbox(configTab, \"Progressive display\", \"Shows incremental updates of the view and allows for more responsive interaction with the model (some elements may flicker) This improves perceived waiting time\",\n    true, function (checked) {\n      viewer.setProgressiveRendering(checked);\n    }, \"progressiveRendering\");\n\n    this.addLabel(configTab, \"Display\");\n  }\n\n  // 2d or 3d\n  // Anything added below this line applies to \"Display\" subtitle\n  this.displayUnitsId = this.addDropDownMenu(configTab, 'Display Units', avp.displayUnits, avp.displayUnitsEnum, null, null, avp.Prefs.DISPLAY_UNITS);\n  this.displayUnitsPrecisionId = this.addDropDownMenu(configTab, 'Precision', avp.displayUnitsPrecision, avp.displayUnitsPrecisionEnum, null, null, avp.Prefs.DISPLAY_UNITS_PRECISION);\n\n  if (this.is3dMode) {\n    this._addSelectionModeOption();\n  }\n};\n\nViewerSettingsPanel.prototype._addSelectionModeOption = function () {\n\n  var configTab = ViewerSettingTab.Configuration;\n\n  this.addLabel(configTab, \"Selection\");\n\n  // Convert enum into arrays\n  var selectionModes = [];\n  var selectionModeValues = [];\n  var i = 0;\n  for (var key in Autodesk.Viewing.SelectionMode) {\n    selectionModes[i] = key;\n    selectionModeValues[i] = Autodesk.Viewing.SelectionMode[key];;\n    i++;\n  }\n  // Capitalize the mode names for display\n  var names = selectionModes.map(function (mode) {return (\n      mode.\n      split('_').\n      map(function (str) {return str.charAt(0) + str.slice(1).toLowerCase();}).\n      join(' '));});\n\n\n  this.selectionModeId = this.addDropDownMenu(configTab, 'Selection Mode', names, selectionModeValues, null, null, avp.Prefs3D.SELECTION_MODE);\n};\n\n/**\n    * Populates the appearance tab with the appropriate checkboxes.\n    */\n\nViewerSettingsPanel.prototype.createAppearancePanel = function () {\n  var viewer = this.viewer;\n  var appearTab = ViewerSettingTab.Appearance;\n  var table = this.tablesContainer.childNodes[2];\n\n\n  if (this.is3dMode) {\n\n    this.addLabel(appearTab, \"Visual Quality Optimization\");\n\n    this.antialiasingChkBoxId = this.addCheckbox(appearTab, \"Anti-aliasing\", \"Remove jagged edges from lines\", true, function (checked) {\n      viewer.setQualityLevel(viewer.prefs.ambientShadows, checked);\n    }, \"antialiasing\");\n\n    this.ambientshadowsChkBoxId = this.addCheckbox(appearTab, \"Ambient shadows\", \"Improve shading of occluded surfaces\", true, function (checked) {\n      viewer.setQualityLevel(checked, viewer.prefs.antialiasing);\n    }, \"ambientShadows\");\n\n    this.groundShadowChkBoxId = this.addCheckbox(appearTab, \"Ground shadow\", \"Add simulated ground surface shadows\", true, function (checked) {\n      viewer.setGroundShadow(checked);\n    }, \"groundShadow\");\n\n    this.groundReflectionChkBoxId = this.addCheckbox(appearTab, \"Ground reflection\", \"Add simulated ground surface reflections\", false, function (checked) {\n      viewer.setGroundReflection(checked);\n    }, \"groundReflection\");\n  }\n\n  if (!this.is3dMode) {\n\n    this.addLabel(appearTab, \"Existing behavior\");\n\n    this.swapBlackAndWhiteChkBoxId = this.addCheckbox(appearTab, \"2D Sheet Color\", \"Switch sheet color white to black\", true, function (checked) {\n      viewer.setSwapBlackAndWhite(checked);\n    }, \"swapBlackAndWhite\");\n\n    this.loadingAnimationChkBoxId = this.addCheckbox(appearTab, \"Loading Animation\", \"Animate lines during loading\", true, function (checked) {\n      viewer.prefs.set(avp.Prefs2D.LOADING_ANIMATION, checked);\n    }, \"loadingAnimation\");\n  }\n};\n\n\nViewerSettingsPanel.prototype.createEnvironmentPanel = function () {\n  if (!this.is3dMode) {\n    return;\n  }\n\n  if (this.envTabCreated)\n  return;\n\n  this.envTabCreated = true;\n\n  var viewer = this.viewer;\n  var environmentTab = ViewerSettingTab.Environment;\n  var table = this.tablesContainer.childNodes[3];\n  this.gridTable = table;\n\n  this.addLabel(environmentTab, \"Environment\");\n\n  this.envMapBackgroundChkBoxId = this.addCheckbox(environmentTab, \"Environment Image Visible\", \"Shows lighting environment as background\", true, function (checked) {\n    viewer.setEnvMapBackground(checked);\n  }.bind(this), \"envMapBackground\");\n\n  var captionRow = table.tBodies[0].insertRow(-1);\n\n  var cell = captionRow.insertCell(0);\n  var _document = this.getDocument();\n  this.caption = _document.createElement(\"div\");\n  this.caption.setAttribute(\"data-i18n\", \"Environments and Lighting Selection\");\n  this.caption.textContent = i18n.translate(\"Environments and Lighting Selection\");\n  this.caption.classList.add(\"settings-row-title\");\n  cell.appendChild(this.caption);\n  cell.colSpan = \"3\";\n\n  this.envSelect = this.addGrid(\n  \"Environments and Lighting Selection\",\n  table,\n  LightPresets,\n  viewer.impl.currentLightPreset(),\n  function onAction(index) {\n    viewer.setLightPreset(index);\n  },\n  avp.Prefs3D.LIGHT_PRESET);\n\n\n  // Only display the icons with environment.\n  this.envSelect.classList.add(\"with-environment\");\n};\n\n/**\n    * Adds viewer version label to Footer div.\n    */\nViewerSettingsPanel.prototype.createVersionLabel = function (parent) {\n\n  if (!parent)\n  return;\n  var _document = this.getDocument();\n  this.versionDiv = _document.createElement('div');\n  this.versionDiv.textContent = getVersionString(this.viewer.config.viewerVersion); // No need to localize.\n  this.versionDiv.className = 'docking-panel-version-label';\n  parent.appendChild(this.versionDiv);\n};\n\n/**\n    * Create a restore default settings button. It is appended to the settings panel\n    */\nViewerSettingsPanel.prototype.createRestoreDefaultSettingsButton = function () {\n  var viewer = this.viewer;\n\n  var _document = this.getDocument();\n  this.restoreDiv = _document.createElement('div');\n  this.restoreDiv.classList.add('docking-panel-container-solid-color-b');\n  this.restoreDiv.classList.add('restore-defaults-container');\n\n  this.restoreButton = _document.createElement('div');\n  this.restoreButton.className = 'docking-panel-tertiary-button';\n  this.restoreButton.setAttribute(\"data-i18n\", \"Restore all default settings\");\n  this.restoreButton.textContent = Autodesk.Viewing.i18n.translate(\"Restore all default settings\");\n  this.restoreDiv.appendChild(this.restoreButton);\n\n  this.addEventListener(this.restoreDiv, 'touchstart', touchStartToClick);\n  this.addEventListener(this.restoreDiv, 'click', function () {\n    viewer.restoreDefaultSettings();\n    avp.analytics.track('viewer.settings.default');\n  }, false);\n\n  this.scrollContainer.appendChild(this.restoreDiv);\n};\n\n\nViewerSettingsPanel.prototype.selectTab = function (tabId) {\n  SettingsPanel.prototype.selectTab.call(this, tabId);\n  this.sizeToContent();\n};\n\n/**\n    * Resizes panel vertically to wrap around the content.\n    * It will always leave some room at the bottom to display the toolbar.\n    */\nViewerSettingsPanel.prototype.sizeToContent = function () {\n  SettingsPanel.prototype.sizeToContent.call(this, this.viewer.container);\n};\n\nViewerSettingsPanel.prototype.onViewerResize = function (vt, vb, vl, vr, vw, vh) {\n  // Avoid default behavior by overriding inherited implementation.\n  this.sizeToContent();\n};\n\n/**\n    * Updates the values in the checkboxes based on what is in the prefs.\n    */\nViewerSettingsPanel.prototype.syncUI = function () {\n  var viewer = this.viewer;\n  var prefs = this.viewer.prefs;\n\n  this.setControlValue(this.antialiasingChkBoxId, prefs.antialiasing);\n  this.setControlValue(this.ambientshadowsChkBoxId, prefs.ambientShadows);\n  this.setControlValue(this.groundShadowChkBoxId, prefs.groundShadow);\n  this.setControlValue(this.groundReflectionChkBoxId, prefs.groundReflection);\n  this.setControlValue(this.envMapBackgroundChkBoxId, viewer.impl.isEnvMapBackground());\n  this.setControlValue(this.progressiveRenderChkBoxId, prefs.progressiveRendering);\n  this.setControlValue(this.swapBlackAndWhiteChkBoxId, prefs.swapBlackAndWhite);\n  this.setControlValue(this.loadingAnimationChkBoxId, prefs.loadingAnimation);\n  this.setControlValue(this.ghosthiddenChkBoxId, prefs.ghosting);\n  this.setControlValue(this.displayLinesId, prefs.lineRendering);\n  this.setControlValue(this.displayPointsId, prefs.pointRendering);\n  this.setControlValue(this.displayEdgesId, prefs.edgeRendering);\n  this.setControlValue(this.scrollSpeed, prefs.zoomScrollSpeed);\n  this.setControlValue(this.dragSpeed, prefs.zoomDragSpeed);\n\n  this.updateEnvironmentSelection();\n};\n\n/**\n    * Safely sets the value of a checkbox control.\n    * \n    * @param {string} ctrlName - The id of the control\n    * @param {boolean} value\n    */\nViewerSettingsPanel.prototype.setControlValue = function (ctrlName, value) {\n  var ctrl = this.getControl(ctrlName);\n  if (ctrl) {\n    ctrl.setValue(value);\n  }\n};\n\n\nfunction getVersionString() {var version = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : LMV_VIEWER_VERSION;\n  if (version.charAt(0) === \"@\") {\n    version = '0.0.0'; // No need to localize.\n  }\n  return 'v' + version;\n}","// extracted by mini-css-extract-plugin","\nimport { Document } from \"../../application/Document\";\nimport { errorCodeString, ErrorCodes } from \"../../file-loaders/net/ErrorCodes\";\nimport { logger } from \"../../logger/Logger\";\nimport { getGlobal } from '../../compat';\n\nvar _window = getGlobal();\nvar _document = _window.document;\n\nexport function BrowserDelegate()\n{\n}\n\nBrowserDelegate.prototype.constructor = BrowserDelegate;\n\nBrowserDelegate.prototype.getNodeId = function (node)\n{\n  throw 'getId is not implemented.';\n};\n\nBrowserDelegate.prototype.getNodeLabel = function (node)\n{\n  return node.name;\n};\n\nBrowserDelegate.prototype.getNodeClass = function (node)\n{\n  return '';\n};\n\nBrowserDelegate.prototype.hasThumbnail = function (node)\n{\n  return false;\n};\n\nBrowserDelegate.prototype.getThumbnailOptions = function (node)\n{\n  return null;\n};\n\nBrowserDelegate.prototype.getThumbnail = function (node)\n{\n  return null;\n};\n\nBrowserDelegate.prototype.onNodeClick = function (browser, node, event)\n{\n};\n\nBrowserDelegate.prototype.onNodeHover = function (browser, node, event)\n{\n};\n\nBrowserDelegate.prototype.selectItem = function (id)\n{\n};\n\nBrowserDelegate.prototype.deselectItem = function (id)\n{\n};\n\nBrowserDelegate.prototype.hasContent = function (node)\n{\n  return false;\n};\n\nBrowserDelegate.prototype.addContent = function (node, element)\n{\n};\n\nexport function Browser(delegate, items, parentContainerId)\n{\n  this.myDelegate = delegate;\n  this.mySelectedIds = [];\n\n  var prefix = 'browserview';\n  this.myRootContainerId = parentContainerId + '-' + prefix;\n\n  this.idToElement = {};\n\n  this.myRootContainer = _document.createElement(\"div\");\n  this.myRootContainer.id = this.myRootContainerId;\n  this.myRootContainer.classList.add(prefix);\n\n  var parent = _document.getElementById(parentContainerId);\n  parent.appendChild(this.myRootContainer);\n\n  this.createElements(items, this.myRootContainer);\n};\n\nBrowser.prototype.constructor = Browser;\n\nBrowser.prototype.show = function (show)\n{\n  if (show) {\n    this.myRootContainer.classList.remove(\"browserHidden\");\n    this.myRootContainer.classList.add(\"browserVisible\");\n    this.myRootContainer.style.display = \"block\";\n  } else {\n    this.myRootContainer.classList.remove(\"browserVisible\");\n    this.myRootContainer.classList.add(\"browserHidden\");\n    this.myRootContainer.style.display = \"none\";\n  }\n};\n\nBrowser.prototype.getRootContainer = function ()\n{\n  return this.myRootContainer;\n};\n\nBrowser.prototype.delegate = function ()\n{\n  return this.myDelegate;\n};\n\nBrowser.prototype.addToSelection = function (ids)\n{\n  var browser = this;\n  function addSingle(id)\n  {\n    var index = browser.mySelectedIds.indexOf(id);\n    if (index == -1)\n    {\n      browser.mySelectedIds.push(id);\n      return true;\n    }\n    return false;\n  }\n\n  for (var i = 0, len = ids.length; i < len; ++i) {\n    var id = ids[i];\n    if (addSingle(id)) {\n      var item = browser.idToElement[id];\n      if (item === undefined) {\n        // Maybe the delegate knows what to do with it.\n        browser.myDelegate.selectItem(id);\n      } else {\n        item.classList.add(\"selected\");\n      }\n    }\n  }\n};\n\nBrowser.prototype.removeFromSelection = function (ids)\n{\n  var browser = this;\n  function removeSingle(id)\n  {\n    var index = browser.mySelectedIds.indexOf(id);\n    if (index != -1)\n    {\n      browser.mySelectedIds.splice(index, 1);\n      return true;\n    }\n    return false;\n  }\n\n  for (var i = ids.length - 1; i >= 0; --i) {\n    var id = ids[i];\n    if (removeSingle(id)) {\n      var item = this.idToElement[id];\n      if (item === undefined) {\n        // Maybe the delegate knows what to do with it.\n        browser.myDelegate.deselectItem(id);\n      } else {\n        item.classList.remove(\"selected\");\n      }\n    }\n  }\n};\n\nBrowser.prototype.setSelection = function (ids)\n{\n  this.removeFromSelection(this.mySelectedIds);\n  this.addToSelection(ids);\n  return this.mySelectedIds;\n};\n\nBrowser.prototype.clearSelection = function ()\n{\n  this.removeFromSelection(this.mySelectedIds);\n};\n\nBrowser.prototype.createElements = function (items, container)\n{\n  if (!items)\n  return;\n\n  var browser = this;\n  for (var nodeIndex = 0; nodeIndex < items.length; nodeIndex++)\n  {\n    var node = items[nodeIndex];\n    browser.createElement(node, container);\n  }\n};\n\nBrowser.prototype.createElement = function (browserNode, container)\n{\n  var browser = this;\n\n  var id = browser.myDelegate.getNodeId(browserNode);\n\n  var item = _document.createElement(\"item\");\n  container.appendChild(item);\n  this.idToElement[id] = item;\n\n  item.onmouseover = function ()\n  {\n    browser.myDelegate.onNodeHover(browser, browserNode);\n  };\n  item.onclick = function (e) {\n    browser.myRootContainer.querySelector(\".flipped\").removeClass(\"flipped\");\n    browser.myDelegate.onNodeClick(browser, browserNode, e);\n  };\n\n\n  var card = _document.createElement(\"div\");\n  card.classList.add(\"card\");\n  item.appendChild(card);\n\n  var elemWrapper = _document.createElement(\"div\");\n  elemWrapper.classList.add(\"browserElement\");\n  card.appendChild(elemWrapper);\n\n  var label = browser.myDelegate.getNodeLabel(browserNode);\n  var labelElem = _document.createElement(\"label\");\n  labelElem.innerHTML = label;\n  elemWrapper.appendChild(labelElem);\n  labelElem.onclick = function (e) {\n    browser.myDelegate.onNodeClick(browser, browserNode, e);\n  };\n\n  var thumbnailUrl = browser.myDelegate.getThumbnail(browserNode);\n  if (thumbnailUrl)\n  {\n    var thumbElem = _document.createElement(\"img\");\n    thumbElem.classList.add(\"thumb\");\n\n    // Code path for when cookies are disabled\n    var thumbnailData = browser.myDelegate.getThumbnailOptions(browserNode);\n    Document.requestThumbnailWithSecurity(thumbnailData, function onThumbnailSuccess(err, response) {\n      if (err) {\n        logger.error(\"Failed to load thumbnail: \" + thumbnailUrl, errorCodeString(ErrorCodes.NETWORK_FAILURE));\n        return;\n      }\n      thumbElem.src = _window.URL.createObjectURL(response);\n      thumbElem.onload = function () {\n        _window.URL.revokeObjectURL(thumbElem.src);\n      };\n    });\n\n    elemWrapper.appendChild(thumbElem);\n    thumbElem.onclick = function (e) {\n      browser.myDelegate.onNodeClick(browser, browserNode, e);\n    };\n  }\n\n  if (browser.myDelegate.hasContent(browserNode)) {\n    browser.myDelegate.addContent(browserNode, card);\n  }\n\n  item.classList.add(browser.myDelegate.getNodeClass(browserNode));\n};","// extracted by mini-css-extract-plugin","\nimport { Control } from \"./Control\";\nimport { isTouchDevice } from \"../../compat\";\nimport { touchStartToClick } from \"../../compat\";\n\n\n/**\n                                                   * Button control that can be added to toolbars.\n                                                   *\n                                                   * @param {string} [id] - The ID for this button. Optional.\n                                                   * @param {object} [options] - An optional dictionary of options.\n                                                   * @param {boolean} [options.collapsible=true] - Whether this button is collapsible.\n                                                   * @constructor\n                                                   * @augments Autodesk.Viewing.UI.Control\n                                                   * @alias Autodesk.Viewing.UI.Button\n                                                   */\nexport function Button(id, options) {\n  Control.call(this, id, options);\n\n  var self = this;\n\n  this._state = Button.State.INACTIVE;\n\n  var _document = this.getDocument();\n  this.icon = _document.createElement(\"div\");\n  this.icon.classList.add(\"adsk-button-icon\");\n  this.container.appendChild(this.icon);\n\n  this.container.addEventListener('click', function (event) {\n    if (self.getState() !== Button.State.DISABLED) {\n      self.dispatchEvent(Button.Event.CLICK);\n      if (self.onClick)\n      self.onClick(event);\n    }\n    event.stopPropagation();\n  });\n\n  // Add rollover only if this is not a touch device.\n  if (!isTouchDevice()) {\n    this.container.addEventListener(\"mouseover\", function (e) {\n      self.onMouseOver(e);\n    });\n\n    this.container.addEventListener(\"mouseout\", function (e) {\n      self.onMouseOut(e);\n    });\n  } else {\n    this.container.addEventListener(\"touchstart\", touchStartToClick);\n  }\n\n  this.addClass('adsk-button');\n  this.addClass(Button.StateToClassMap[this._state]);\n};\n\n/**\n    * Enum for button event IDs.\n    * @readonly\n    * @enum {String}\n    */\nButton.Event = {\n  // Inherited from Control\n  VISIBILITY_CHANGED: Control.Event.VISIBILITY_CHANGED,\n  COLLAPSED_CHANGED: Control.Event.COLLAPSED_CHANGED,\n\n  STATE_CHANGED: 'Button.StateChanged',\n  CLICK: 'click' };\n\n\n/**\n                     * Enum for button states\n                     * @readonly\n                     * @enum {Number}\n                     * @static\n                     * @alias Autodesk.Viewing.UI.Button.State\n                     */\nButton.State = {\n  ACTIVE: 0,\n  INACTIVE: 1,\n  DISABLED: 2 };\n\n\n/**\n                  * @private\n                  */\nButton.StateToClassMap = function () {\n  var state = Button.State;\n  var map = {};\n\n  map[state.ACTIVE] = 'active';\n  map[state.INACTIVE] = 'inactive';\n  map[state.DISABLED] = 'disabled';\n\n  return map;\n}();\n\n\n/**\n      * Event fired when state of the button changes.\n      *\n      * @event Autodesk.Viewing.UI.Button#STATE_CHANGED\n      * @type {object}\n      * @property {string} buttonId - The ID of the button that fired this event.\n      * @property {Autodesk.Viewing.UI.Button.State} state - The new state of the button.\n      */\n\nButton.prototype = Object.create(Control.prototype);\nButton.prototype.constructor = Button;\n\n/**\n                                        * Sets the state of this button.\n                                        *\n                                        * @param {Autodesk.Viewing.UI.Button.State} state - The state.\n                                        * @returns {boolean} True if the state was set successfully.\n                                        * @fires Autodesk.Viewing.UI.Button#STATE_CHANGED\n                                        *\n                                        * @alias Autodesk.Viewing.UI.Button#setState\n                                        */\nButton.prototype.setState = function (state) {\n  if (state === this._state) {\n    return false;\n  }\n\n  this.removeClass(Button.StateToClassMap[this._state]);\n  this.addClass(Button.StateToClassMap[state]);\n  this._state = state;\n\n  var event = {\n    type: Button.Event.STATE_CHANGED,\n    state: state };\n\n\n  this.dispatchEvent(event);\n\n  return true;\n};\n\n/**\n    * Sets the icon for the button.\n    *\n    * @param {string} iconClass - The CSS class defining the appearance of the button icon (e.g. image background).\n    *\n    * @alias Autodesk.Viewing.UI.Button#setIcon\n    */\nButton.prototype.setIcon = function (iconClass) {\n  if (this.iconClass)\n  this.icon.classList.remove(this.iconClass);\n  this.iconClass = iconClass;\n  this.icon.classList.add(iconClass);\n};\n\n\n/**\n    * Returns the state of this button.\n    *\n    * @returns {Autodesk.Viewing.UI.Button.State} The state of the button.\n    *\n    * @alias Autodesk.Viewing.UI.Button#getState\n    */\nButton.prototype.getState = function () {\n  return this._state;\n};\n\n/**\n    * Override this method to be notified when the user clicks on the button.\n    * @param {MouseEvent} event\n    *\n    * @alias Autodesk.Viewing.UI.Button#onClick\n    */\nButton.prototype.onClick = function (event) {\n\n};\n\n/**\n    * Override this method to be notified when the mouse enters the button.\n    * @param {MouseEvent} event\n    *\n    * @alias Autodesk.Viewing.UI.Button#onMouseOver\n    */\nButton.prototype.onMouseOver = function (event) {\n\n};\n\n/**\n    * Override this method to be notified when the mouse leaves the button.\n    * @param {MouseEvent} event\n    *\n    * @alias Autodesk.Viewing.UI.Button#onMouseOut\n    */\nButton.prototype.onMouseOut = function (event) {\n\n};","// extracted by mini-css-extract-plugin","\nimport { Button } from \"./Button\";\nimport { RadioButtonGroup } from \"./RadioButtonGroup\";\nimport { stringToDOM } from \"../../globals\";\n\n\n/**\n                                              * ComboButton with submenu that can be added to toolbars.\n                                              *\n                                              * @param {string} [id] - The id for this comboButton. Optional.\n                                              * @param {object} [options] - An optional dictionary of options.\n                                              * @constructor\n                                              * @augments Autodesk.Viewing.UI.Button\n                                              * @alias Autodesk.Viewing.UI.ComboButton\n                                              */\nexport function ComboButton(id, options) {\n  Button.call(this, id, options);\n\n  this.arrowButton = new Button(id + 'arrow');\n  this.arrowButton.addClass('adsk-button-arrow');\n  this.arrowButton.removeClass('adsk-button');\n\n  this.subMenu = new RadioButtonGroup(id + 'SubMenu');\n  this.subMenu.addClass('toolbar-vertical-group');\n  this.subMenu.setVisible(false);\n\n  this.container.insertBefore(this.subMenu.container, this.container.firstChild);\n  this.container.insertBefore(this.arrowButton.container, this.container.firstChild);\n\n  var scope = this;\n  this.arrowButton.onClick = function (e) {\n    scope.subMenu.setVisible(!scope.subMenu.isVisible());\n  };\n\n  this.toggleFlyoutVisible = function () {\n    scope.subMenu.setVisible(!scope.subMenu.isVisible());\n  };\n\n  this.onClick = function (e) {\n    scope.subMenu.setVisible(!scope.subMenu.isVisible());\n  };\n\n  this.subMenuActiveButtonChangedHandler = function (event) {\n    if (event.isActiveButton) {\n      scope.setIcon(event.target.getActiveButton().iconClass);\n      scope.setToolTip(event.target.getActiveButton().getToolTip());\n      scope.setState(Button.State.ACTIVE);\n      scope.onClick = event.button.onClick;\n    } else\n    {\n      scope.setState(Button.State.INACTIVE);\n    }\n  };\n\n  this.subMenu.addEventListener(RadioButtonGroup.Event.ACTIVE_BUTTON_CHANGED, this.subMenuActiveButtonChangedHandler);\n\n  // put up an invisible div to catch click-off close submenu\n  var clickOff = stringToDOM('<div class=\"clickoff\" style=\"position:fixed; top:0; left:0; width:100vw; height:100vh;\"></div>');\n  this.subMenu.container.insertBefore(clickOff, this.subMenu.container.firstChild);\n  clickOff.addEventListener(\"click\", function (e) {\n    scope.subMenu.setVisible(false);\n    e.stopPropagation();\n  });\n\n};\n\nComboButton.prototype = Object.create(Button.prototype);\nComboButton.prototype.constructor = ComboButton;\n\n\n/**\n                                                  * Adds a new control to the combo fly-out.\n                                                  *\n                                                  * @param {Autodesk.Viewing.UI.Button} button\n                                                  *\n                                                  * @alias Autodesk.Viewing.UI.ComboButton#addControl\n                                                  */\nComboButton.prototype.addControl = function (button) {\n\n  this.subMenu.addControl(button);\n  button.addEventListener(Button.Event.CLICK, this.toggleFlyoutVisible);\n};\n\n/**\n    * Removes a control from the combo fly-out.\n    *\n    * @param {Autodesk.Viewing.UI.Button} button\n    *\n    * @alias Autodesk.Viewing.UI.ComboButton#removeControl\n    */\nComboButton.prototype.removeControl = function (button) {\n\n  button.removeEventListener(Button.Event.CLICK, this.toggleFlyoutVisible);\n};\n\n/**\n    * Sets the state of this combo button.\n    *\n    * @param {Autodesk.Viewing.UI.Button.State} state - The state.\n    *\n    * @alias Autodesk.Viewing.UI.ComboButton#setState\n    */\nComboButton.prototype.setState = function (state) {\n\n  //Overloaded to inactivate children when the parent is inactivated\n  if (state === Button.State.INACTIVE) {\n    var ab = this.subMenu.getActiveButton();\n    if (ab) {\n      ab.setState(Button.State.INACTIVE);\n    }\n  }\n\n  //Also call super\n  Button.prototype.setState.call(this, state);\n};\n\n/**\n    * Copies tooltip (if any), icon and click handler into an internal attribute.\n    * Can be restored through {@link #restoreDefault}.\n    *\n    * @alias Autodesk.Viewing.UI.ComboButton#saveAsDefault\n    */\nComboButton.prototype.saveAsDefault = function () {\n  this.defaultState = {};\n  // Save tooltip\n  if (this._toolTipElement && this._toolTipElement.getAttribute(\"tooltipText\")) {\n    this.defaultState.tooltip = this._toolTipElement.getAttribute(\"tooltipText\");\n  }\n  // Save icon\n  this.defaultState.icon = this.iconClass;\n  // Save click handler\n  this.defaultState.onClick = this.onClick;\n};\n\n/**\n    * Restores visual settings previously stored through {@link #saveAsDefault}.\n    *\n    * @alias Autodesk.Viewing.UI.ComboButton#restoreDefault\n    */\nComboButton.prototype.restoreDefault = function () {\n  if (!this.defaultState) return;\n  if (this.defaultState.tooltip) {\n    this.setToolTip(this.defaultState.tooltip);\n  }\n  if (this.defaultState.icon) {\n    this.setIcon(this.defaultState.icon);\n  }\n  this.onClick = this.defaultState.onClick; // No check on this one.\n  this.setState(Button.State.INACTIVE);\n};","// extracted by mini-css-extract-plugin","\nimport { EventDispatcher } from \"../../application/EventDispatcher\";\nimport { GlobalManagerMixin } from \"../../application/GlobalManagerMixin\";\n\n\n/**\n                                                                            * Base class for UI controls.\n                                                                            *\n                                                                            * It is abstract and should not be instantiated directly.\n                                                                            * @param {string} [id] - The id for this control.\n                                                                            * @param {object} [options] - Dictionary with options.\n                                                                            * @param {boolean} [options.collapsible=true] - Whether this control is collapsible.\n                                                                            * @constructor\n                                                                            * @abstract\n                                                                            * @alias Autodesk.Viewing.UI.Control\n                                                                            */\nexport function Control(id, options) {\n  this._id = id;\n  this._isCollapsible = !options || options.collapsible;\n\n  this._toolTipElement = null;\n\n  this._listeners = {};\n\n  this.container = this.getDocument().createElement('div');\n  this.container.id = id;\n  this.addClass('adsk-control');\n};\n\nGlobalManagerMixin.call(Control.prototype);\n\n/**\n                                             * Enum for control event IDs.\n                                             * @readonly\n                                             * @enum {String}\n                                             * @static\n                                             * @alias Autodesk.Viewing.UI.Control.Event\n                                             */\nControl.Event = {\n  VISIBILITY_CHANGED: 'Control.VisibilityChanged',\n  COLLAPSED_CHANGED: 'Control.CollapsedChanged' };\n\n\n/**\n                                                    * Event fired when the visibility of the control changes.\n                                                    *\n                                                    * @event Autodesk.Viewing.UI.Control#VISIBILITY_CHANGED\n                                                    * @type {object}\n                                                    * @property {string} controlId - The ID of the control that fired this event.\n                                                    * @property {boolean} isVisible - True if the control is now visible.\n                                                    */\n\n/**\n                                                        * Event fired when the collapsed state of the control changes.\n                                                        *\n                                                        * @event Autodesk.Viewing.UI.Control#COLLAPSED_CHANGED\n                                                        * @type {object}\n                                                        * @property {string} controlId - The ID of the control that fired this event.\n                                                        * @property {boolean} isCollapsed - True if the control is now collapsed.\n                                                        */\n\nEventDispatcher.prototype.apply(Control.prototype);\nControl.prototype.constructor = Control;\n\n/**\n                                          * The HTMLElement representing this control.\n                                          *\n                                          * @type {HTMLElement}\n                                          * @public\n                                          * @alias Autodesk.Viewing.UI.Control.container\n                                          */\nControl.prototype.container = null;\n\n/**\n                                     * Gets this control's ID.\n                                     *\n                                     * @returns {string} The control's ID.\n                                     *\n                                     * @alias Autodesk.Viewing.UI.Control#getId\n                                     */\nControl.prototype.getId = function () {\n  return this._id;\n};\n\n/**\n    * Sets the visibility of this control.\n    *\n    * @param {boolean} visible - The visibility value to set.\n    * @returns {boolean} True if the control's visibility changed.\n    *\n    * @fires Autodesk.Viewing.UI.Control#VISIBILITY_CHANGED\n    *\n    * @alias Autodesk.Viewing.UI.Control#setVisible\n    */\nControl.prototype.setVisible = function (visible) {\n  var isVisible = !this.container.classList.contains('adsk-hidden');\n\n  if (isVisible === visible) {\n    return false;\n  }\n\n  if (visible) {\n    this.container.classList.remove('adsk-hidden');\n  } else {\n    this.container.classList.add('adsk-hidden');\n  }\n\n  var event = {\n    type: Control.Event.VISIBILITY_CHANGED,\n    target: this,\n    controlId: this._id,\n    isVisible: visible };\n\n\n  this.dispatchEvent(event);\n\n  return true;\n};\n\n/**\n    * Gets the visibility of this control.\n    * @returns {boolean} True if the this control is visible.\n    *\n    * @alias Autodesk.Viewing.UI.Control#isVisible\n    */\nControl.prototype.isVisible = function () {\n  return !this.container.classList.contains('adsk-hidden');\n};\n\n/**\n    * Sets the tooltip text for this control.\n    * @param {string} toolTipText - The text for the tooltip.\n    * @returns {boolean} True if the tooltip was successfully set.\n    *\n    * @alias Autodesk.Viewing.UI.Control#setToolTip\n    */\nControl.prototype.setToolTip = function (toolTipText) {\n  if (this._toolTipElement && this._toolTipElement.getAttribute(\"tooltipText\") === toolTipText) {\n    return false;\n  }\n\n  if (!this._toolTipElement) {\n    this._toolTipElement = this.getDocument().createElement('div');\n    this._toolTipElement.id = this._id + '-tooltip';\n    this._toolTipElement.classList.add('adsk-control-tooltip');\n    this.container.appendChild(this._toolTipElement);\n  }\n\n  this._toolTipElement.setAttribute(\"data-i18n\", toolTipText);\n  this._toolTipElement.setAttribute(\"tooltipText\", toolTipText);\n  this._toolTipElement.textContent = Autodesk.Viewing.i18n.translate(toolTipText, { defaultValue: toolTipText });\n\n  return true;\n};\n\n/**\n    * Returns the tooltip text for this control.\n    * @returns {string} The tooltip text. Null if it's not set.\n    *\n    * @alias Autodesk.Viewing.UI.Control#getToolTip\n    */\nControl.prototype.getToolTip = function () {\n  return this._toolTipElement && this._toolTipElement.getAttribute(\"tooltipText\");\n};\n\n/**\n    * Sets the collapsed state of this control.\n    * @param {boolean} collapsed - The collapsed value to set.\n    * @returns {boolean} True if the control's collapsed state changes.\n    * @fires Autodesk.Viewing.UI.Control#COLLAPSED_CHANGED\n    *\n    * @alias Autodesk.Viewing.UI.Control#setCollapsed\n    */\nControl.prototype.setCollapsed = function (collapsed) {\n  if (!this._isCollapsible || this.isCollapsed() === collapsed) {\n    return false;\n  }\n\n  if (collapsed) {\n    this.container.classList.add('collapsed');\n  } else {\n    this.container.classList.remove('collapsed');\n  }\n\n  var event = {\n    type: Control.Event.COLLAPSED_CHANGED,\n    isCollapsed: collapsed };\n\n\n  this.dispatchEvent(event);\n\n  return true;\n};\n\n/**\n    * Gets the collapsed state of this control.\n    * @returns {boolean} True if this control is collapsed.\n    *\n    * @alias Autodesk.Viewing.UI.Control#isCollapsed\n    */\nControl.prototype.isCollapsed = function () {\n  return !!this.container.classList.contains('collapsed');\n};\n\n/**\n    * Returns whether or not this control is collapsible.\n    * @returns {boolean} True if this control can be collapsed.\n    *\n    * @alias Autodesk.Viewing.UI.Control#isCollapsible\n    */\nControl.prototype.isCollapsible = function () {\n  return this._isCollapsible;\n};\n\n/**\n    * Adds a CSS class to this control.\n    * @param {string} cssClass - The name of the CSS class.\n    *\n    * @alias Autodesk.Viewing.UI.Control#addClass\n    *\n    */\nControl.prototype.addClass = function (cssClass) {\n  this.container.classList.add(cssClass);\n};\n\n/**\n    * Removes a CSS class from this control.\n    * @param {string} cssClass - The name of the CSS class.\n    *\n    * @alias Autodesk.Viewing.UI.Control#removeClass\n    */\nControl.prototype.removeClass = function (cssClass) {\n\n  this.container.classList.remove(cssClass);\n\n};\n\n/**\n    * Returns the position of this control relative to the canvas.\n    * @returns {object} The `top` and `left` values of the toolbar.\n    *\n    * @alias Autodesk.Viewing.UI.Control#getPosition\n    */\nControl.prototype.getPosition = function () {\n  var clientRect = this.container.getBoundingClientRect();\n\n  return { top: clientRect.top, left: clientRect.left };\n};\n\n/**\n    * Returns the dimensions of this control.\n    * @returns {object} The `width` and `height` of the toolbar.\n    *\n    * @alias Autodesk.Viewing.UI.Control#getDimensions\n    */\nControl.prototype.getDimensions = function () {\n  var clientRect = this.container.getBoundingClientRect();\n\n  return { width: clientRect.width, height: clientRect.height };\n};\n\n/**\n    * Sets the CSS `display` style value.\n    *\n    * @param {string} value - CSS display value\n    *\n    * @alias Autodesk.Viewing.UI.Control#setDisplay\n    */\nControl.prototype.setDisplay = function (value) {\n  this.container.style.display = value;\n};\n\n/**\n    * Removes current control from its parent container.\n    * @returns {boolean} True if the control was successfully removed.\n    *\n    * @alias Autodesk.Viewing.UI.Control#removeFromParent\n    */\nControl.prototype.removeFromParent = function () {\n  // Make sure the current control is assigned to a parent first.\n  if (!this.parent) {\n    return false;\n  }\n\n  return this.parent.removeControl(this);\n};","// extracted by mini-css-extract-plugin","\nimport { Control } from \"./Control\";\n\n/**\n                                      * Class for grouping controls.\n                                      *\n                                      * @param {string} [id] - The id for this control group.\n                                      * @param {object} [options] - An optional dictionary of options.\n                                      * @param {boolean} [options.collapsible=true] - Whether this control group is collapsible.\n                                      * @constructor\n                                      * @augments Autodesk.Viewing.UI.Control\n                                      * @alias Autodesk.Viewing.UI.ControlGroup\n                                      */\nexport function ControlGroup(id, options) {\n  Control.call(this, id, options);\n\n  var self = this;\n\n  this._controls = [];\n\n  this.addClass('adsk-control-group');\n\n  this.handleChildSizeChanged = function (event) {\n    var sizeEvent = {\n      type: ControlGroup.Event.SIZE_CHANGED,\n      childEvent: event };\n\n    self.dispatchEvent(sizeEvent);\n  };\n};\n\n/**\n    * Enum for control group event IDs.\n    * @readonly\n    * @enum {String}\n    */\nControlGroup.Event = {\n  // Inherited from Control\n  VISIBILITY_CHANGED: Control.Event.VISIBILITY_CHANGED,\n  COLLAPSED_CHANGED: Control.Event.COLLAPSED_CHANGED,\n\n  SIZE_CHANGED: 'ControlGroup.SizeChanged',\n  CONTROL_ADDED: 'ControlGroup.ControlAdded',\n  CONTROL_REMOVED: 'ControlGroup.ControlRemoved' };\n\n\n/**\n                                                     * Event fired a control is added to the control group.\n                                                     *\n                                                     * @event Autodesk.Viewing.UI.ControlGroup#CONTROL_ADDED\n                                                     * @type {object}\n                                                     * @property {string} control - The control that was added.\n                                                     * @property {number} index - The index at which the control was added.\n                                                     */\n\n/**\n                                                         * Event fired when a control is removed from the control group.\n                                                         *\n                                                         * @event Autodesk.Viewing.UI.ControlGroup#CONTROL_REMOVED\n                                                         * @type {object}\n                                                         * @property {string} control - The control that was removed.\n                                                         * @property {number} index - The index at which the control was removed.\n                                                         */\n\n/**\n                                                             * Event fired when the size of the control group changes.\n                                                             *\n                                                             * @event Autodesk.Viewing.UI.ControlGroup#SIZE_CHANGED\n                                                             * @type {object}\n                                                             * @property {object} childEvent - The event that the child fired.\n                                                             */\n\nControlGroup.prototype = Object.create(Control.prototype);\nControlGroup.prototype.constructor = ControlGroup;\n\n/**\n                                                    * Adds a control to this control group.\n                                                    *\n                                                    * @param {Autodesk.Viewing.UI.Control} control - The control to add.\n                                                    * @param {object} [options] - An option dictionary of options.\n                                                    * @param {object} [options.index] - The index to insert the control at.\n                                                    * @returns {boolean} True if the control was successfully added.\n                                                    * @fires Autodesk.Viewing.UI.ControlGroup#CONTROL_ADDED\n                                                    * @fires Autodesk.Viewing.UI.ControlGroup#SIZE_CHANGED\n                                                    *\n                                                    * @alias Autodesk.Viewing.UI.ControlGroup#addControl\n                                                    */\nControlGroup.prototype.addControl = function (control, options) {\n  // Pass the global manager to the control\n  control.setGlobalManager(this.globalManager);\n\n  var index = options && options.index !== undefined ? options.index : this._controls.length;\n\n  if (this.getControl(control.getId()) !== null) {\n    return false;\n  }\n\n  var addedEvent = {\n    type: ControlGroup.Event.CONTROL_ADDED,\n    control: control,\n    index: index };\n\n\n  if (index < this._controls.length) {\n    this.container.insertBefore(control.container, this._controls[index].container);\n    this._controls.splice(index, 0, control);\n  } else {\n    this.container.appendChild(control.container);\n    this._controls.push(control);\n  }\n\n  // Listen for events on the child controls that may trigger a change in out size\n  control.addEventListener(Control.Event.VISIBILITY_CHANGED, this.handleChildSizeChanged);\n  control.addEventListener(Control.Event.COLLAPSED_CHANGED, this.handleChildSizeChanged);\n  if (control instanceof ControlGroup) {\n    control.addEventListener(ControlGroup.Event.SIZE_CHANGED, this.handleChildSizeChanged);\n  }\n\n  control.parent = this;\n\n  this.dispatchEvent(addedEvent);\n  this.dispatchEvent(ControlGroup.Event.SIZE_CHANGED);\n\n  return true;\n};\n\n/**\n    * Returns the index of a control in this group. -1 if the item isn't found.\n    * @param {string|Autodesk.Viewing.UI.Control} control - The control ID or control instance to find.\n    * @returns {number} Index of a successfully removed control, otherwise -1.\n    *\n    * @alias Autodesk.Viewing.UI.ControlGroup#indexOf\n    */\nControlGroup.prototype.indexOf = function (control) {\n  for (var i = 0; i < this._controls.length; i++) {\n    var c = this._controls[i];\n    if (c === control || typeof control === \"string\" && control === c.getId()) {\n      return i;\n    }\n  }\n\n  return -1;\n};\n\n/**\n    * Removes a control from this control group.\n    * @param {string|Autodesk.Viewing.UI.Control} control - The control ID or control instance to remove.\n    * @returns {boolean} True if the control was successfully removed.\n    * @fires Autodesk.Viewing.UI.ControlGroup#CONTROL_REMOVED\n    * @fires Autodesk.Viewing.UI.ControlGroup#SIZE_CHANGED\n    *\n    * @alias Autodesk.Viewing.UI.ControlGroup#removeControl\n    */\nControlGroup.prototype.removeControl = function (control) {\n\n  var thecontrol = typeof control === \"string\" ? this.getControl(control) : control;\n\n  if (!thecontrol) {\n    return false;\n  }\n\n  var index = this._controls.indexOf(thecontrol);\n  if (index === -1) {\n    return false;\n  }\n\n  this._controls.splice(index, 1);\n  this.container.removeChild(thecontrol.container);\n\n  var addedEvent = {\n    type: ControlGroup.Event.CONTROL_REMOVED,\n    control: thecontrol,\n    index: index };\n\n\n  // Remove listeners from children\n  thecontrol.removeEventListener(Control.Event.VISIBILITY_CHANGED, this.handleChildSizeChanged);\n  thecontrol.removeEventListener(Control.Event.COLLAPSED_CHANGED, this.handleChildSizeChanged);\n  if (thecontrol instanceof ControlGroup) {\n    thecontrol.removeEventListener(ControlGroup.Event.SIZE_CHANGED, this.handleChildSizeChanged);\n  }\n\n  thecontrol.parent = undefined;\n\n  this.dispatchEvent(addedEvent);\n  this.dispatchEvent(ControlGroup.Event.SIZE_CHANGED);\n\n  return true;\n};\n\n/**\n    * Returns the control with the corresponding ID if it is in this control group.\n    * @param {string} controlId - The ID of the control.\n    * @returns {Autodesk.Viewing.UI.Control} The control or null if it doesn't exist.\n    *\n    * @alias Autodesk.Viewing.UI.ControlGroup#getControl\n    */\nControlGroup.prototype.getControl = function (controlId) {\n  for (var i = 0; i < this._controls.length; i++) {\n    if (controlId === this._controls[i].getId()) {\n      return this._controls[i];\n    }\n  }\n\n  return null;\n};\n\n/**\n    * Returns the control ID with for corresponding index if it is in this control group.\n    * @param {number} index - Index of the control.\n    * @returns {string} The ID of the control or null if it doesn't exist.\n    *\n    * @alias Autodesk.Viewing.UI.ControlGroup#getControlId\n    */\nControlGroup.prototype.getControlId = function (index) {\n\n  if (index < 0 || index >= this._controls.length) {\n    return null;\n  }\n  return this._controls[index].getId();\n};\n\n\n/**\n    * Returns the number of controls in this control group.\n    * @returns {number} The number of controls.\n    *\n    * @alias Autodesk.Viewing.UI.ControlGroup#getNumberOfControls\n    */\nControlGroup.prototype.getNumberOfControls = function () {\n  return this._controls.length;\n};\n\n/**\n    * Sets the collapsed state of this control group. Iterates over the child controls and calls\n    * child.setCollapsed(collapsed).\n    * @param {boolean} collapsed - The collapsed value to set.\n    * @returns {boolean} True if at least one collapsible child's state changes.\n    * @fires Autodesk.Viewing.UI.Control#COLLAPSED_CHANGED\n    *\n    * @alias Autodesk.Viewing.UI.ControlGroup#setCollapsed\n    */\nControlGroup.prototype.setCollapsed = function (collapsed) {\n  if (!this._isCollapsible) {\n    return false;\n  }\n\n  var childHasCollapsed = false;\n\n  this._controls.forEach(function (control) {\n    if (control.isCollapsible() && control.setCollapsed(collapsed)) {\n      childHasCollapsed = true;\n    }\n  });\n\n  if (childHasCollapsed) {\n    if (collapsed) {\n      this.container.classList.add('collapsed');\n    } else {\n      this.container.classList.remove('collapsed');\n    }\n\n    this.dispatchEvent({\n      type: ControlGroup.Event.COLLAPSED_CHANGED,\n      isCollapsed: collapsed });\n\n  }\n\n  return childHasCollapsed;\n};","// extracted by mini-css-extract-plugin","\nimport { Control } from \"./Control\";\nimport { i18n } from \"../../globalization/i18next\";\n\n\n/**\n                                                     * A text input that invokes a callback when the text changes.\n                                                     *\n                                                     * @param {string} [id] - The id for this control.\n                                                     * @param {object} [options] - An optional dictionary of options.\n                                                     * @param {function} [options.filterFunction] - Invoked when the text changes, receives 1 string argument.\n                                                     * \n                                                     * @memberof Autodesk.Viewing.UI\n                                                     * @alias Autodesk.Viewing.UI.Filterbox\n                                                     * @class\n                                                     * @constructor\n                                                     */\nexport function Filterbox(id, options) {\n\n  this._id = id;\n  this._listeners = {};\n  this._options = options || {};\n  this._filterFunction = this._options.filterFunction || function () {};\n\n  var _document = this.getDocument();\n  this.container = _document.createElement('div');\n  this.container.id = id;\n  this.addClass('adsk-control');\n  this.addClass('adsk-filterbox');\n  this.addClass(\"empty\");\n\n  var filterbox = _document.createElement(\"input\");\n  filterbox.classList.add(\"filter-box\");\n  filterbox.classList.add(\"docking-panel-delimiter-shadow\");\n  filterbox.type = \"search\";\n\n  filterbox.placeholder = i18n.translate('Enter filter term');\n  filterbox.setAttribute('data-i18n', 'Enter filter term');\n\n  filterbox.incremental = \"incremental\";\n  filterbox.autosave = this.container.id + \"filter\";\n  this.container.appendChild(filterbox);\n  this.filterbox = filterbox;\n\n  var self = this;\n\n  var clearFilterbox = function clearFilterbox() {\n    self.filterbox.value = '';\n    self.addClass(\"empty\");\n  };\n\n  var doFilter = function doFilter(text) {\n    text = text.trim();\n\n    if (text.length === 0) {\n      self.container.classList.add(\"empty\");\n    } else {\n      self.container.classList.remove(\"empty\");\n    }\n\n    self._filterFunction && self._filterFunction(text);\n  };\n\n  var filterboxIcon = _document.createElement(\"div\");\n  filterboxIcon.className = \"filter-box-icon\";\n  this.container.insertBefore(filterboxIcon, filterbox.nextSibling);\n\n  var filterboxClose = _document.createElement(\"div\");\n  filterboxClose.className = \"filter-box-close\";\n  filterboxClose.addEventListener(\"click\", function () {\n    clearFilterbox();\n  });\n  this.container.appendChild(filterboxClose);\n\n  filterbox.addEventListener(\"keydown\", function (e) {\n\n    var _window = self.getWindow();\n    e = e || _window.event;\n\n    // Enter\n    if (e.keyCode === 13) {\n      self.filterbox.blur();\n    }\n  });\n\n  filterbox.addEventListener(\"input\", function (e) {\n    doFilter(this.value);\n  });\n\n  filterbox.addEventListener(\"change\", function (e) {\n    doFilter(this.value);\n  });\n\n  filterbox.addEventListener(\"focus\", function () {\n    filterboxIcon.classList.add('focused');\n  });\n\n  filterbox.addEventListener(\"blur\", function () {\n    filterboxIcon.classList.remove('focused');\n  });\n};\n\nFilterbox.prototype = Object.create(Control.prototype);\nFilterbox.prototype.constructor = Filterbox;","\nimport { ControlGroup } from \"./ControlGroup\";\nimport { Button } from \"./Button\";\nimport { Control } from \"./Control\";\n\n\n/**\n                                      * Group of controls that act like a radio group.\n                                      *\n                                      * I.e., only one button may be active at a time. Only accepts {@link Autodesk.Viewing.UI.Button}.\n                                      * @param {string} id - The id for this control group.\n                                      * @param {object} [options] - An optional dictionary of options.\n                                      * @param {boolean} [options.collapsible=true] - Whether this control group is collapsible.\n                                      * @constructor\n                                      * @augments Autodesk.Viewing.UI.ControlGroup\n                                      * @alias Autodesk.Viewing.UI.RadioButtonGroup\n                                      */\nexport function RadioButtonGroup(id, options) {\n  ControlGroup.call(this, id, options);\n\n  var self = this;\n\n  this._activeButton = null;\n\n  this._handleButtonStateChange = function (event) {\n    var states = Button.State;\n\n    if (event.state !== states.ACTIVE) {\n      if (event.target === self._activeButton) {\n        self._activeButton = null;\n        self.dispatchEvent({\n          type: RadioButtonGroup.Event.ACTIVE_BUTTON_CHANGED,\n          button: event.target,\n          isActiveButton: false });\n\n      }\n      return;\n    } else {\n      self._activeButton = event.target;\n      self.dispatchEvent({\n        type: RadioButtonGroup.Event.ACTIVE_BUTTON_CHANGED,\n        button: event.target,\n        isActiveButton: true });\n\n    }\n\n    self._controls.forEach(function (control) {\n      if (control !== event.target && control.getState() !== states.DISABLED) {\n        control.setState(states.INACTIVE);\n      }\n    });\n  };\n};\n\n/**\n    * Enum for radio button group event IDs.\n    * @readonly\n    * @enum {String}\n    */\nRadioButtonGroup.Event = {\n  ACTIVE_BUTTON_CHANGED: 'RadioButtonGroup.ActiveButtonChanged',\n\n  // Inherited from Control\n  VISIBILITY_CHANGED: Control.Event.VISIBILITY_CHANGED,\n  COLLAPSED_CHANGED: Control.Event.COLLAPSED_CHANGED,\n\n  // Inherited from ControlGroup\n  CONTROL_ADDED: ControlGroup.Event.CONTROL_ADDED,\n  CONTROL_REMOVED: ControlGroup.Event.CONTROL_REMOVED,\n  SIZE_CHANGED: ControlGroup.Event.SIZE_CHANGED };\n\n\n/**\n                                                    * Event fired when active button for this radio group changes.\n                                                    *\n                                                    * @event Autodesk.Viewing.UI.RadioButtonGroup#ACTIVE_BUTTON_CHANGED\n                                                    * @type {object}\n                                                    * @property {Autodesk.Viewing.UI.Button} button - The button whose state is changing.\n                                                    * @property {boolean} isActiveButton - Is the event target the currently active button.\n                                                    */\n\nRadioButtonGroup.prototype = Object.create(ControlGroup.prototype);\nRadioButtonGroup.prototype.constructor = RadioButtonGroup;\n\n/**\n                                                            * Adds a control to this radio button group. The control must be a {@link Autodesk.Viewing.UI.Button|button}.\n                                                            *\n                                                            * @param {Autodesk.Viewing.UI.Button} control - The button to add.\n                                                            * @param {object} [options] - An option dictionary of options.\n                                                            * @param {object} [options.index] - The index to insert the control at.\n                                                            * @returns {boolean} True if the button was successfully added.\n                                                            * @fires Autodesk.Viewing.UI.ControlGroup#CONTROL_ADDED\n                                                            * @fires Autodesk.Viewing.UI.ControlGroup#SIZE_CHANGED\n                                                            *\n                                                            * @alias Autodesk.Viewing.UI.RadioButtonGroup#addControl\n                                                            */\nRadioButtonGroup.prototype.addControl = function (control, options) {\n  if (!(control instanceof Button)) {\n    return false;\n  }\n\n  // Add listeners for radio functionality if we were successful\n  if (ControlGroup.prototype.addControl.call(this, control, options)) {\n    control.addEventListener(Button.Event.STATE_CHANGED, this._handleButtonStateChange);\n    return true;\n  }\n\n  return false;\n};\n\n/**\n    * Removes a control from this control group.\n    *\n    * @param {string|Autodesk.Viewing.UI.Control} control - The control ID or control instance to remove.\n    * @returns {boolean} True if the control was successfully removed.\n    * @fires Autodesk.Viewing.UI.ControlGroup#CONTROL_REMOVED\n    * @fires Autodesk.Viewing.UI.ControlGroup#SIZE_CHANGED\n    *\n    * @alias Autodesk.Viewing.UI.RadioButtonGroup#removeControl\n    */\nRadioButtonGroup.prototype.removeControl = function (control) {\n\n  var thecontrol = typeof control == \"string\" ? this.getControl(control) : control;\n\n  // Remove listeners for radio functionality if we were successful\n  if (thecontrol !== null && ControlGroup.prototype.removeControl.call(this, thecontrol)) {\n    thecontrol.removeEventListener(Button.Event.STATE_CHANGED, this._handleButtonStateChange);\n    return true;\n  }\n\n  return false;\n};\n\n/**\n    * Returns the active button in this radio button group.\n    *\n    * @returns {Autodesk.Viewing.UI.Button} The active button. Null if no button is active.\n    *\n    * @alias Autodesk.Viewing.UI.RadioButtonGroup#getActiveButton\n    */\nRadioButtonGroup.prototype.getActiveButton = function () {\n  return this._activeButton;\n};","\n\n\nexport var ON_SEARCH_SELECTED = 'search-selected';","// extracted by mini-css-extract-plugin","\nimport { EventDispatcher } from \"../../application/EventDispatcher\";\nimport * as se from \"./SearchEvents\";\nimport { ResizeFooter } from \"../CommonWidgets\";\nimport { GlobalManagerMixin } from \"../../application/GlobalManagerMixin\";\n\n\nvar ITEM_HEIGHT = 50; // pixels\nvar FOOTER_HEIGHT = 20; // pixels\nvar ELEMENT_POOL_LENGHT = 150; // count\nvar SCROLL_SAFE_PADDING = 100; // pixels\n\nexport function SearchResults(parent, excludeRoot, viewer) {\n  this.excludeRoot = excludeRoot;\n  this.viewer = viewer;\n  this.results = [];\n  this.resultCount = 0;\n  this.selectedIndex = -1;\n\n  var _document = this.getDocument();\n  this.container = _document.createElement('div');\n  this.container.classList.add('docking-panel');\n  this.container.classList.add('adsk-search-results');\n\n  this.container.results = _document.createElement('div');\n  this.container.results.classList.add('docking-panel-scroll');\n  this.container.results.classList.add('docking-panel-container-solid-color-b');\n  this.container.results.addEventListener('scroll', _onScroll.bind(this));\n  this.container.appendChild(this.container.results);\n  parent.insertBefore(this.container, parent.firstChild);\n\n  this.scrollingContainer = _document.createElement('div');\n  this.scrollingContainer.classList.add('adsk-search-results-scrolling-panel');\n  this.scrollingContainer.addEventListener('click', _onClickResult.bind(this));\n  this.container.results.appendChild(this.scrollingContainer);\n\n  this.footer = new ResizeFooter(this.container, function () {\n    var bounds = this.container.getBoundingClientRect();\n    var viewerBounds = this.viewer.container.getBoundingClientRect();\n\n    if (viewerBounds.right < bounds.right) {\n      this.container.style.width = viewerBounds.right - bounds.left + 'px';\n    }\n\n    if (viewerBounds.bottom < bounds.bottom) {\n      this.container.style.height = viewerBounds.bottom - bounds.top + 'px';\n    }\n  }.bind(this));\n  this.footer.setGlobalManager(this.globalManager);\n\n  this.divNoResults = createNoResultsDiv(_document);\n  this.scrollingContainer.appendChild(this.divNoResults);\n\n  this.scrollY = 0;\n  this.dirty = false;\n  this.nextFrameId = 0;\n  this.it = createIterator();\n\n  // Creates element pools.\n  this.elementsPool = [];\n  this.elementsUsed = 0;\n  for (var i = 0; i < ELEMENT_POOL_LENGHT; ++i) {\n    this.elementsPool[i] = createPoolElement(_document);\n  }\n\n  this.setVisible(false);\n}\n\nSearchResults.prototype.constructor = SearchResults;\nEventDispatcher.prototype.apply(SearchResults.prototype);\nGlobalManagerMixin.call(SearchResults.prototype);\n\nSearchResults.prototype.setPosition = function (left, top) {\n  this.container.style.left = left + 'px';\n  this.container.style.top = top + 'px';\n};\n\nSearchResults.prototype.setMinWidth = function (minWidth) {\n  this.container.style.width = minWidth + 'px';\n};\n\nSearchResults.prototype.setMaxWidth = function (maxHeight) {\n  this.container.style.maxHeight = maxHeight + 'px';\n};\n\nSearchResults.prototype.setVisible = function (visible) {\n  this.container.style.display = visible ? '' : 'none';\n};\n\nSearchResults.prototype.setResults = function (searchString, results) {\n  this.searchString = searchString;\n  this.results = results;\n  this.resultCount = getResultCount(results);\n  this.selectedIndex = this.resultCount == 0 ? -1 : 0;\n  this.container.style.height = this.resultCount * ITEM_HEIGHT + FOOTER_HEIGHT + 'px';\n  this.container.results.scrollTop = 0;\n  this.scrollY = 0;\n\n  if (this.resultCount === 0) {\n    this.container.classList.add('no-content');\n  } else {\n    this.container.classList.remove('no-content');\n  }\n\n  redraw(this);\n};\n\nSearchResults.prototype.getSelection = function () {\n  var element = this.scrollingContainer.querySelector('.selected');\n  if (!element) {\n    return null;\n  }\n\n  var parts = this._getNodeAndModelIds(element);\n  if (!parts) {\n    return null;\n  }\n\n  return parts;\n};\n\nSearchResults.prototype.isRootExcluded = function () {\n  if (this.results && this.results.length > 1) {\n    return false;\n  }\n  return this.modelCount > 1 ? false : this.excludeRoot;\n};\n\nSearchResults.prototype.uninitialize = function () {\n  this.setVisible(false);\n  this.container = null;\n\n  if (this.container.parentNode) {\n    this.container.parentNode.removeChild(this.container);\n  }\n\n  cancelAnimationFrame(this.nextFrameId);\n  this.clearListeners(); // from EventDispatcher\n};\n\nSearchResults.prototype.setDisplayNoResults = function (display) {\n  this.divNoResults.style.display = display ? '' : 'none';\n};\n\nSearchResults.prototype.selectNext = function () {\n  if (this.resultCount !== 0) {\n    this.selectedIndex = Math.min(this.resultCount - 1, this.selectedIndex + 1);\n    scrollToSelection(this.container.results, this.selectedIndex);\n    redraw(this);\n  }\n};\n\nSearchResults.prototype.selectPrevious = function () {\n  if (this.resultCount !== 0) {\n    this.selectedIndex = Math.max(0, this.selectedIndex - 1);\n    scrollToSelection(this.container.results, this.selectedIndex);\n    redraw(this);\n  }\n};\n\n/**\n    * @private\n    * @param {*} div\n    * @returns {undefined|{nodeId:Number, modelId:Number}} \n    */\nSearchResults.prototype._getNodeAndModelIds = function (div) {\n  while (!div.hasAttribute('lmv-nodeId')) {\n    div = div.parentNode;\n    if (!div || div === this.scrollingContainer) {\n      return undefined;\n    }\n  }\n  var dbId = parseInt(div.getAttribute('lmv-nodeId'));\n  var mdId = parseInt(div.getAttribute('lmv-modelId'));\n  return { nodeId: dbId, modelId: mdId };\n};\n\n\n/**\n    * Binded to SearchResults instance.\n    * @private\n    */\nfunction _onClickResult(event) {\n  var div = event.target;\n  var parts = this._getNodeAndModelIds(div);\n\n  if (!parts) {\n    return;\n  }\n\n  this.fireEvent({ type: se.ON_SEARCH_SELECTED, id: parts.nodeId, modelId: parts.modelId });\n  event.preventDefault();\n};\n\n/**\n    * Binded to SearchResults instance.\n    * @private\n    */\nfunction _onScroll(event) {\n  // Avoid re-building the tree unless we have scrolled far enough.\n  var scrollY = this.container.results.scrollTop;\n  if (Math.abs(this.scrollY - scrollY) >= SCROLL_SAFE_PADDING) {\n    this.scrollY = scrollY;\n    redraw(this);\n  }\n};\n\nfunction redraw(panel, immediate) {\n  // If the panel is not dirty, marked as dirty and schedule an update during next frame.\n  if (panel.dirty && !immediate) {\n    return;\n  }\n\n  if (immediate) {\n    renderNow(panel);\n  } else {\n    panel.dirty = true;\n\n    // All update requests are executed as one during next frame.\n    panel.nextFrameId = requestAnimationFrame(function () {\n      renderNow(panel);\n    });\n  }\n}\n\nfunction renderNow(panel) {\n  panel.dirty = false;\n  clearElements(panel);\n\n  if (panel.resultCount === 0) {\n    panel.setDisplayNoResults(true);\n    return;\n  }\n\n  panel.setDisplayNoResults(false);\n  createVisibleElements(panel);\n}\n\nfunction clearElements(panel) {\n\n  var elementsUsed = panel.elementsUsed;\n  var elementsPool = panel.elementsPool;\n\n  // Return used elements to the elements pool.\n  for (var i = 0; i < elementsUsed; ++i) {\n    var element = elementsPool[i];\n    cleanPoolElement(element);\n  }\n\n  panel.elementsUsed = 0;\n}\n\nfunction createVisibleElements(panel) {\n  var container = panel.container.results;\n  var currY = 0;\n  var idx = 0;\n\n  var CONTAINER_HEIGHT = container.clientHeight;\n  var currScroll = panel.scrollY;\n  var it = panel.it.init(panel.results);\n\n  // skip rows above the scrolling area\n  var skipY = Math.max(0, panel.scrollY - SCROLL_SAFE_PADDING);\n  var skipCount = Math.floor(skipY / ITEM_HEIGHT) | 0;\n  var itemIndex = 0;\n  currY = skipCount * ITEM_HEIGHT;\n  while (skipCount) {\n    skipCount--;\n    itemIndex++;\n    it.next();\n  }\n  var paddingElement = panel.elementsPool[panel.elementsUsed++];\n  paddingElement.style.height = currY + 'px';\n  panel.scrollingContainer.appendChild(paddingElement);\n\n  // Start rendering items until we don't have any more vertical space.\n  var adding = true;\n  while (adding) {\n\n    // Advance the iterator\n    it.next();\n    if (it.done()) {\n      adding = false;\n      break;\n    }\n\n    // Any more room vertically?\n    if (currY > currScroll + CONTAINER_HEIGHT + SCROLL_SAFE_PADDING) {\n      adding = false;\n      break;\n    }\n\n    // Any more DIVs in the pool?\n    if (panel.elementsUsed === panel.elementsPool.length) {\n      adding = false;\n      break;\n    }\n\n    var id = it.id();\n    var delegate = it.delegate();\n    var elemHeight = ITEM_HEIGHT;\n    var elemTop = currY;\n    var elemBtm = elemTop + elemHeight;\n\n    var element = panel.elementsPool[panel.elementsUsed++];\n    populateResultEntry(id, delegate, element, panel, itemIndex === panel.selectedIndex);\n\n    panel.scrollingContainer.appendChild(element);\n\n    // move height counter\n    currY = elemBtm;\n    itemIndex++;\n  }\n\n  // account for non-rendered elements at the bottom\n  var totalY = panel.resultCount * ITEM_HEIGHT;\n  panel.scrollingContainer.style.height = totalY + 'px';\n}\n\n/**\n   * @param {Array} results \n   * @returns {Number} The amount of search results across all loaded models.\n   * @private\n   */\nfunction getResultCount(results) {\n  var count = 0;\n  for (var m = 0; m < results.length; ++m) {\n    var modelResults = results[m];\n    count += modelResults.ids.length;\n  }\n  return count;\n}\n\n/**\n   * Returns an iterator specialized for search results, which consists of an Array containing\n   * objects with { delegate:TreeDelegate, ids: Array<Number> } \n   * \n   * Must invoke init() before usage.\n   * \n   * @private\n   */\nfunction createIterator() {\n\n  var iterator = {\n    init: function init(results) {\n      this.isDone = false;\n      this.results = results; // doesn't mutate it.\n      this.indexRs = 0; // Index into `results`\n      this.indexId = -1; // Index into `ids`\n      return this;\n    },\n    done: function done() {\n      return this.isDone;\n    },\n    next: function next() {\n      if (this.isDone) {\n        return this;\n      }\n      this.indexId++;\n      while (this.results.length !== this.indexRs && this.indexId === this.results[this.indexRs].ids.length) {\n        this.indexId = 0;\n        this.indexRs++;\n      }\n      this.isDone = this.indexRs === this.results.length;\n      return this;\n    },\n    id: function id() {\n      return this.results[this.indexRs].ids[this.indexId];\n    },\n    delegate: function delegate() {\n      return this.results[this.indexRs].delegate;\n    } };\n\n\n  return iterator;\n}\n\nfunction populateResultEntry(id, delegate, element, panel, selected) {\n  // Set the height, always.\n  element.classList.add('search-result');\n\n  // Add / Remove selection class.\n  if (selected) {\n    element.classList.add('selected');\n  } else {\n    element.classList.remove('selected');\n  }\n\n  // Attributes\n  element.setAttribute(\"lmv-nodeId\", id);\n  element.setAttribute('lmv-modelId', delegate.model.id);\n  element.style.height = ITEM_HEIGHT + 'px';\n\n  // Get the label\n  var nodeName = delegate.instanceTree.getNodeName(id);\n\n  // Find the matching substring\n  var searchString = panel.searchString;\n  var index = nodeName.toLowerCase().indexOf(searchString.toLowerCase());\n\n  var prefixStr = nodeName.substr(0, index);\n  var matchStr = nodeName.substr(index, searchString.length);\n  var sufixStr = nodeName.substr(index + searchString.length);\n\n  element.domPrefix.innerText = prefixStr;\n  element.domMatch.innerText = matchStr;\n  element.domSufix.innerText = sufixStr;\n\n  // Populate path\n  var route = getParentLabels(id, delegate, panel);\n  element.domPath.innerText = route.join(' > ');\n}\n\nfunction getParentLabels(id, delegate, panel) {\n  var res = [];\n  var rootId = delegate.getRootId();\n  var excludeRoot = panel.isRootExcluded();\n  var instanceTree = delegate.instanceTree;\n  var parentId = id;\n  var done = false;\n  while (parentId && !done) {\n    if (parentId === rootId) {\n      // Include root and nothing else.\n      // The root might be a doubleRoot, thus we need an explicit stop.\n      done = true;\n      if (excludeRoot) {\n        break; // avoid including the root in this case.\n      }\n    }\n    var label = instanceTree.getNodeName(parentId);\n    res.unshift(label); // add to front\n    parentId = instanceTree.getNodeParentId(parentId);\n  }\n  return res;\n}\n\n/**\n   * @private\n   */\nfunction createPoolElement(_document) {\n\n  var element = _document.createElement('div');\n  var innerElem = _document.createElement('div');\n\n  var prefix = _document.createElement('span');\n  var match = _document.createElement('span');\n  var sufix = _document.createElement('span');\n  var path = _document.createElement('span');\n\n  innerElem.classList.add('search-result-container');\n  match.classList.add('search-match');\n  path.classList.add('search-path');\n\n  innerElem.appendChild(prefix);\n  innerElem.appendChild(match);\n  innerElem.appendChild(sufix);\n  innerElem.appendChild(path);\n  element.appendChild(innerElem);\n\n  // Keep easy to access pointers\n  element.domPrefix = prefix;\n  element.domMatch = match;\n  element.domSufix = sufix;\n  element.domPath = path;\n  element.domContainer = innerElem;\n\n  return element;\n}\n\n/**\n   * @private\n   */\nfunction cleanPoolElement(element) {\n  element.setAttribute('lmv-nodeId', '');\n  element.setAttribute('lmv-modelId', '');\n  element.domPrefix.innerText = '';\n  element.domMatch.innerText = '';\n  element.domSufix.innerText = '';\n  element.domPath.innerText = '';\n  element.style.height = '0';\n}\n\n/**\n   * @private\n   */\nfunction createNoResultsDiv(_document) {\n\n  var divNoResults = _document.createElement('div');\n  var divTitle = _document.createElement('div');\n  var divMessage = _document.createElement('div');\n\n  // container\n  divNoResults.classList.add('no-results-container');\n  divNoResults.style.display = 'none';\n\n  // title\n  var textTitle = 'No Results';\n  divTitle.setAttribute('data-i18n', textTitle);\n  divTitle.textContent = Autodesk.Viewing.i18n.translate(textTitle);\n  divTitle.classList.add('no-results-title');\n\n  // message\n  var textMessage = 'Try another term';\n  divMessage.setAttribute('data-i18n', textMessage);\n  divMessage.textContent = Autodesk.Viewing.i18n.translate(textMessage);\n  divMessage.classList.add('no-results-description');\n\n  divNoResults.appendChild(divTitle);\n  divNoResults.appendChild(divMessage);\n\n  // Keep easy to access pointers\n  divNoResults.domTitle = divTitle;\n  divNoResults.domMessage = divMessage;\n\n  return divNoResults;\n};\n\n/**\n    * @private\n    */\nfunction scrollToSelection(results, selectedIndex) {\n  if (results.scrollTop + results.clientHeight < (selectedIndex + 1) * ITEM_HEIGHT) {\n    results.scrollTop += (selectedIndex + 1) * ITEM_HEIGHT - (results.scrollTop + results.clientHeight);\n  }\n  if (results.scrollTop / ITEM_HEIGHT > selectedIndex) {\n    results.scrollTop = selectedIndex * ITEM_HEIGHT;\n  }\n}","// extracted by mini-css-extract-plugin","\nimport { Control } from \"./Control\";\nimport * as se from \"./SearchEvents\";\nimport { logger } from \"../../logger/Logger\";\nimport { SearchResults } from \"./SearchResults\";\nimport { i18n } from \"../../globalization/i18next\";\n\n\n/**\n                                                     * Base class for UI controls.\n                                                     *\n                                                     * It is abstract and should not be instantiated directly.\n                                                     * @param {string} [id] - The id for this control. Optional.\n                                                     * @param {object} [options] - An optional dictionary of options.\n                                                     * @abstract\n                                                     * @memberof Autodesk.Viewing.UI\n                                                     * @private\n                                                     */\nexport function Searchbox(id, viewer, options) {\n\n  this._id = id;\n  this._listeners = {};\n  this._options = options || {};\n  this._searchFunction = this._options.searchFunction || function () {};\n\n  var _document = this.getDocument();\n  this.container = _document.createElement('div');\n  this.container.id = id;\n  this.addClass('adsk-control');\n  this.addClass('adsk-searchbox');\n  this.addClass(\"empty\");\n\n  var searchbox = _document.createElement(\"input\");\n  searchbox.classList.add(\"search-box\");\n  searchbox.classList.add(\"docking-panel-delimiter-shadow\");\n  searchbox.type = \"search\";\n  searchbox.results = [];\n\n  searchbox.placeholder = i18n.translate(\"Search\");\n  searchbox.setAttribute(\"data-i18n\", \"Search\");\n\n  searchbox.incremental = \"incremental\";\n  searchbox.autosave = this.container.id + \"search_autosave\";\n  this.container.insertBefore(searchbox, this.scrollContainer);\n  this.searchbox = searchbox;\n\n  var clearSearchBox = function clearSearchBox() {\n    self.searchbox.value = '';\n    self.addClass(\"empty\");\n  };\n\n  var closeSearchResults = function closeSearchResults() {\n    self.searchbox.classList.remove('searching');\n    self.searchResults.setVisible(false);\n  };\n\n  var searchboxIcon = _document.createElement(\"div\");\n  searchboxIcon.className = \"search-box-icon\";\n  this.container.insertBefore(searchboxIcon, searchbox.nextSibling);\n\n  var searchboxClose = _document.createElement(\"div\");\n  searchboxClose.className = \"search-box-close\";\n  searchboxClose.addEventListener(\"click\", function () {\n    clearSearchBox();\n    closeSearchResults();\n  });\n  this.container.appendChild(searchboxClose);\n\n  this.searchResults = new SearchResults(this.container, options.excludeRoot, viewer);\n  this.searchResults.addEventListener(se.ON_SEARCH_SELECTED, function (event) {\n    clearSearchBox();\n    closeSearchResults();\n    self.fireEvent(event);\n  });\n\n  var self = this;\n  //ADP\n  var trackAdpFirstSearch = true;\n\n  function doSearch() {\n\n    var searchString = searchbox.value.trim();\n    if (searchString.length === 0) {\n      closeSearchResults();\n      return;\n    }\n\n    if (trackAdpFirstSearch) {\n      logger.track({ category: 'search_node', name: 'model_browser_tool' });\n      trackAdpFirstSearch = false;\n    }\n\n    // The search is actually a filter that displays results for node-names that contain the search string.\n    searchbox.classList.add('searching');\n\n    var resultIds = self._searchFunction(searchString);\n    self.searchResults.setResults(searchString, resultIds);\n    self.searchResults.setVisible(true);\n  }\n\n  var TIMEOUT = 800;\n  var timeout;\n\n  searchbox.addEventListener(\"keydown\", function (e) {\n\n    var _window = self.getWindow();\n    e = e || _window.event;\n\n    // Arrow down.\n    if (e.keyCode === 38) {\n      self.searchResults.selectPrevious();\n      e.preventDefault();\n    }\n\n    // Arrow down.\n    if (e.keyCode === 40) {\n      self.searchResults.selectNext();\n      e.preventDefault();\n    }\n\n    // Enter\n    if (e.keyCode === 13) {\n      var selection = self.searchResults.getSelection();\n      if (!selection) {\n        return false;\n      }\n\n      clearSearchBox();\n      closeSearchResults();\n\n      self.fireEvent({ type: Searchbox.Events.ON_SEARCH_SELECTED, id: selection.nodeId, modelId: selection.modelId });\n      e.preventDefault();\n    }\n  });\n\n  searchbox.addEventListener(\"input\", function (e) {// delayed: as typing\n\n    // Close the serach result panel, if opened.\n    if (this.value.length === 0) {\n      self.container.classList.add(\"empty\");\n      closeSearchResults();\n      return;\n    }\n\n    self.container.classList.remove(\"empty\");\n\n    // prevent search while typing text that is too short.\n    if (this.value.length < 3) {\n      return;\n    }\n\n    clearTimeout(timeout);\n    timeout = setTimeout(doSearch, TIMEOUT);\n  });\n\n  searchbox.addEventListener(\"change\", function (e) {// immediate: press enter\n    var _document = self.getDocument();\n    if (e.target === _document.activeElement) {\n      clearTimeout(timeout);\n      doSearch();\n    } else {\n      // focus lost, don't search.\n    }\n  });\n\n  searchbox.addEventListener(\"focus\", function () {\n    searchboxIcon.classList.add('focused');\n  });\n\n  searchbox.addEventListener(\"blur\", function () {\n    searchboxIcon.classList.remove('focused');\n  });\n};\n\nSearchbox.prototype = Object.create(Control.prototype);\nSearchbox.prototype.constructor = Searchbox;\n\n//TODO: Remove this once ViewerModelStructurePanel is modularized\n// Events fired\nSearchbox.Events = {\n  ON_SEARCH_SELECTED: se.ON_SEARCH_SELECTED };","// extracted by mini-css-extract-plugin","// extracted by mini-css-extract-plugin","function _typeof(obj) {\"@babel/helpers - typeof\";if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {_typeof = function _typeof(obj) {return typeof obj;};} else {_typeof = function _typeof(obj) {return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;};}return _typeof(obj);}function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}function _get(target, property, receiver) {if (typeof Reflect !== \"undefined\" && Reflect.get) {_get = Reflect.get;} else {_get = function _get(target, property, receiver) {var base = _superPropBase(target, property);if (!base) return;var desc = Object.getOwnPropertyDescriptor(base, property);if (desc.get) {return desc.get.call(receiver);}return desc.value;};}return _get(target, property, receiver || target);}function _superPropBase(object, property) {while (!Object.prototype.hasOwnProperty.call(object, property)) {object = _getPrototypeOf(object);if (object === null) break;}return object;}function _inherits(subClass, superClass) {if (typeof superClass !== \"function\" && superClass !== null) {throw new TypeError(\"Super expression must either be null or a function\");}subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } });if (superClass) _setPrototypeOf(subClass, superClass);}function _setPrototypeOf(o, p) {_setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {o.__proto__ = p;return o;};return _setPrototypeOf(o, p);}function _createSuper(Derived) {var hasNativeReflectConstruct = _isNativeReflectConstruct();return function _createSuperInternal() {var Super = _getPrototypeOf(Derived),result;if (hasNativeReflectConstruct) {var NewTarget = _getPrototypeOf(this).constructor;result = Reflect.construct(Super, arguments, NewTarget);} else {result = Super.apply(this, arguments);}return _possibleConstructorReturn(this, result);};}function _possibleConstructorReturn(self, call) {if (call && (_typeof(call) === \"object\" || typeof call === \"function\")) {return call;}return _assertThisInitialized(self);}function _assertThisInitialized(self) {if (self === void 0) {throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");}return self;}function _isNativeReflectConstruct() {if (typeof Reflect === \"undefined\" || !Reflect.construct) return false;if (Reflect.construct.sham) return false;if (typeof Proxy === \"function\") return true;try {Date.prototype.toString.call(Reflect.construct(Date, [], function () {}));return true;} catch (e) {return false;}}function _getPrototypeOf(o) {_getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {return o.__proto__ || Object.getPrototypeOf(o);};return _getPrototypeOf(o);}import SplitViewResizeHandler from './SplitViewResizeHandler';var\n\nSplitViewHorizontalHandler = /*#__PURE__*/function (_SplitViewResizeHandl) {_inherits(SplitViewHorizontalHandler, _SplitViewResizeHandl);var _super = _createSuper(SplitViewHorizontalHandler);function SplitViewHorizontalHandler() {_classCallCheck(this, SplitViewHorizontalHandler);return _super.apply(this, arguments);}_createClass(SplitViewHorizontalHandler, [{ key: \"initResizeHandlerElement\", value: function initResizeHandlerElement()\n\n    {\n      _get(_getPrototypeOf(SplitViewHorizontalHandler.prototype), \"initResizeHandlerElement\", this).call(this);\n\n      this.resizeHandlerElement.classList.add('horizontal');\n      this.handlerSplitLine.classList.add('horizontal');\n\n      this.resizeHandlerElement.style.height = \"\".concat(this.margin, \"px\");\n    } }, { key: \"getTargetWidthPercentage\", value: function getTargetWidthPercentage(\n\n    e, rect) {\n      var adjustedMousePos = e.pageY - rect.top;\n      var targetWidthPercentage = adjustedMousePos / rect.height * 100;\n\n      return targetWidthPercentage;\n    } }, { key: \"setPosition\", value: function setPosition(\n\n    percentage) {\n      this.resizeHandlerElement.style.top = \"calc(\".concat(percentage, \"% - \").concat(this.margin / 2, \"px)\");\n    } }]);return SplitViewHorizontalHandler;}(SplitViewResizeHandler);export { SplitViewHorizontalHandler as default };","function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}import SplitViewVerticalHandler from './SplitViewVerticalHandler';\nimport SplitViewHorizontalHandler from './SplitViewHorizontalHandler';\nimport './SplitViewLayout.scss';\n\nexport var SplitViewLayout = /*#__PURE__*/function () {\n  function SplitViewLayout(splitType) {_classCallCheck(this, SplitViewLayout);\n    this._splitType = splitType || SplitViewLayout.SplitType.Vertical;\n\n    this.onResizeHandlerMove = this.onResizeHandlerMove.bind(this);\n  }_createClass(SplitViewLayout, [{ key: \"createSplitViewLayout\", value: function createSplitViewLayout(\n\n    targetContainer, first, second) {\n      this.targetContainer = targetContainer;\n\n      // Create split container\n      this.splitViewContainer = document.createElement('div');\n      this.splitViewContainer.classList.add('split-view-container');\n\n      // replace target div with the split container\n      this.targetContainer.parentNode.replaceChild(this.splitViewContainer, this.targetContainer);\n\n      // Wrap first viewer\n      this.firstViewerContainer = this.wrapViewerContainer(first);\n\n      // Add resize handler\n      if (this._splitType === SplitViewLayout.SplitType.Vertical) {\n        this._resizeHandler = new SplitViewVerticalHandler(this.splitViewContainer, this.onResizeHandlerMove);\n      } else if (this._splitType === SplitViewLayout.SplitType.Horizontal) {\n        this._resizeHandler = new SplitViewHorizontalHandler(this.splitViewContainer, this.onResizeHandlerMove);\n      } else {\n        console.error(\"unknown splitType\");\n        return;\n      }\n\n      if (this._resizeHandler) {\n        this.splitViewContainer.appendChild(this._resizeHandler.resizeHandlerElement);\n      }\n\n      // Wrap second viewer\n      this.secondViewerContainer = this.wrapViewerContainer(second);\n\n      this.onResizeHandlerMove(50);\n    } }, { key: \"wrapViewerContainer\", value: function wrapViewerContainer(\n\n    elementToWrap) {\n      var container = document.createElement('div');\n      container.className = 'split-view-viewer-container';\n\n      if (elementToWrap) {\n        container.appendChild(elementToWrap);\n      }\n\n      this.splitViewContainer.appendChild(container);\n      return container;\n    } }, { key: \"restoreMainViewer\", value: function restoreMainViewer()\n\n    {\n      if (this._resizeHandler) {\n        this._resizeHandler.terminate();\n        this._resizeHandler = null;\n      }\n\n      if (this.splitViewContainer) {\n        // restore original target to its place\n        this.splitViewContainer.parentNode.replaceChild(this.targetContainer, this.splitViewContainer);\n        this.splitViewContainer = null;\n        this.targetContainer = null;\n        this.firstViewerContainer = null;\n        this.secondViewerContainer = null;\n      }\n    } }, { key: \"onResizeHandlerMove\", value: function onResizeHandlerMove(\n\n    targetWidthPercentage) {\n      if (this._resizeHandler) {\n        this._resizeHandler.setPosition(targetWidthPercentage);\n      }\n\n      if (this._splitType === SplitViewLayout.SplitType.Vertical) {\n        this.firstViewerContainer.style.width = \"\".concat(targetWidthPercentage, \"%\");\n        this.secondViewerContainer.style.width = \"\".concat(100 - targetWidthPercentage, \"%\");\n        this.secondViewerContainer.style.left = \"\".concat(targetWidthPercentage, \"%\");\n      } else if (this._splitType === SplitViewLayout.SplitType.Horizontal) {\n        this.firstViewerContainer.style.height = \"\".concat(targetWidthPercentage, \"%\");\n        this.secondViewerContainer.style.height = \"\".concat(100 - targetWidthPercentage, \"%\");\n        this.secondViewerContainer.style.top = \"\".concat(targetWidthPercentage, \"%\");\n      }\n    } }]);return SplitViewLayout;}();\n\n\nSplitViewLayout.SplitType = { Vertical: 'vertical', Horizontal: 'horizontal' };","// extracted by mini-css-extract-plugin","function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}function _createForOfIteratorHelper(o, allowArrayLike) {var it;if (typeof Symbol === \"undefined\" || o[Symbol.iterator] == null) {if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === \"number\") {if (it) o = it;var i = 0;var F = function F() {};return { s: F, n: function n() {if (i >= o.length) return { done: true };return { done: false, value: o[i++] };}, e: function e(_e) {throw _e;}, f: F };}throw new TypeError(\"Invalid attempt to iterate non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\");}var normalCompletion = true,didErr = false,err;return { s: function s() {it = o[Symbol.iterator]();}, n: function n() {var step = it.next();normalCompletion = step.done;return step;}, e: function e(_e2) {didErr = true;err = _e2;}, f: function f() {try {if (!normalCompletion && it.return != null) it.return();} finally {if (didErr) throw err;}} };}function _unsupportedIterableToArray(o, minLen) {if (!o) return;if (typeof o === \"string\") return _arrayLikeToArray(o, minLen);var n = Object.prototype.toString.call(o).slice(8, -1);if (n === \"Object\" && o.constructor) n = o.constructor.name;if (n === \"Map\" || n === \"Set\") return Array.from(o);if (n === \"Arguments\" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);}function _arrayLikeToArray(arr, len) {if (len == null || len > arr.length) len = arr.length;for (var i = 0, arr2 = new Array(len); i < len; i++) {arr2[i] = arr[i];}return arr2;}var inputMap = {\n  down: {\n    pointer: 'pointerdown',\n    mouse: 'mousedown',\n    touch: 'touchstart' },\n\n  up: {\n    pointer: 'pointerup',\n    mouse: 'mouseup',\n    touch: 'touchend' },\n\n  move: {\n    pointer: 'pointermove',\n    mouse: 'mousemove',\n    touch: 'touchmove' } };\n\n\n\nfunction _getInputEvents(type) {\n  if (Autodesk.Viewing.isIE11) {\n    return [inputMap[type].pointer];\n  }\n\n  var events = [];\n  if (!Autodesk.Viewing.isMobileDevice()) {\n    events.push(inputMap[type].mouse);\n  }\n\n  if (Autodesk.Viewing.isTouchDevice()) {\n    events.push(inputMap[type].touch);\n  }\n\n  return events;\n}\n\nfunction addRemoveInputEvents(elem, type, cb) {var isRemoving = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : false;\n  var action = (isRemoving ? 'remove' : 'add') + 'EventListener';\n  var events = _getInputEvents(type);var _iterator = _createForOfIteratorHelper(\n  events),_step;try {for (_iterator.s(); !(_step = _iterator.n()).done;) {var event = _step.value;\n      elem[action](event, cb);\n    }} catch (err) {_iterator.e(err);} finally {_iterator.f();}\n}var\n\nSplitViewResizeHandler = /*#__PURE__*/function () {\n  function SplitViewResizeHandler(container, onMoveCB) {_classCallCheck(this, SplitViewResizeHandler);\n    this.container = container;\n    this.isDragging = false;\n    this.resizeHandlerElement = null;\n    this.onMoveCB = onMoveCB;\n    this.panelSizeThreshold = 20;\n    this.margin = 16;\n    this.initResizeHandlerElement();\n  }_createClass(SplitViewResizeHandler, [{ key: \"onDown\", value: function onDown(\n\n    e) {\n      this.isDragging = true;\n      e.preventDefault();\n    } }, { key: \"onUp\", value: function onUp(\n\n    e) {\n      this.isDragging = false;\n    } }, { key: \"onMove\", value: function onMove(\n\n    e) {\n      if (this.isDragging) {\n        if (e.type === 'touchmove') {\n          e.pageX = e.touches[0].pageX;\n          e.pageY = e.touches[0].pageY;\n        }\n\n        var rect = this.container.getBoundingClientRect();\n\n        var targetWidthPercentage = this.getTargetWidthPercentage(e, rect);\n\n        if (this.panelSizeThreshold < targetWidthPercentage && targetWidthPercentage < 100 - this.panelSizeThreshold) {\n          this.onMoveCB(targetWidthPercentage);\n        }\n      }\n    } }, { key: \"getTargetWidthPercentage\", value: function getTargetWidthPercentage(\n\n    e, rect) {\n      // Override\n    } }, { key: \"initResizeHandlerElement\", value: function initResizeHandlerElement()\n\n    {\n      this.resizeHandlerElement = document.createElement('div');\n      this.handlerSplitLine = document.createElement('div');\n      this.resizeHandlerElement.appendChild(this.handlerSplitLine);\n\n      addRemoveInputEvents(this.resizeHandlerElement, 'down', this.onDown.bind(this));\n\n      this.onUpBinded = this.onUp.bind(this);\n      this.onMoveBinded = this.onMove.bind(this);\n\n      addRemoveInputEvents(document, 'move', this.onMoveBinded);\n      addRemoveInputEvents(document, 'up', this.onUpBinded);\n\n      this.resizeHandlerElement.className = 'resize-handler';\n      this.handlerSplitLine.className = 'resize-handler-center-mark';\n    } }, { key: \"setPosition\", value: function setPosition(\n\n    percentage) {\n      // Override\n    } }, { key: \"terminate\", value: function terminate()\n\n    {\n      this.resizeHandlerElement.parentNode.removeChild(this.resizeHandlerElement);\n      this.resizeHandlerElement = null;\n      addRemoveInputEvents(document, 'up', this.onUpBinded, true);\n      addRemoveInputEvents(document, 'move', this.onMoveBinded, true);\n    } }]);return SplitViewResizeHandler;}();export { SplitViewResizeHandler as default };","function _typeof(obj) {\"@babel/helpers - typeof\";if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {_typeof = function _typeof(obj) {return typeof obj;};} else {_typeof = function _typeof(obj) {return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;};}return _typeof(obj);}function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}function _get(target, property, receiver) {if (typeof Reflect !== \"undefined\" && Reflect.get) {_get = Reflect.get;} else {_get = function _get(target, property, receiver) {var base = _superPropBase(target, property);if (!base) return;var desc = Object.getOwnPropertyDescriptor(base, property);if (desc.get) {return desc.get.call(receiver);}return desc.value;};}return _get(target, property, receiver || target);}function _superPropBase(object, property) {while (!Object.prototype.hasOwnProperty.call(object, property)) {object = _getPrototypeOf(object);if (object === null) break;}return object;}function _inherits(subClass, superClass) {if (typeof superClass !== \"function\" && superClass !== null) {throw new TypeError(\"Super expression must either be null or a function\");}subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } });if (superClass) _setPrototypeOf(subClass, superClass);}function _setPrototypeOf(o, p) {_setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {o.__proto__ = p;return o;};return _setPrototypeOf(o, p);}function _createSuper(Derived) {var hasNativeReflectConstruct = _isNativeReflectConstruct();return function _createSuperInternal() {var Super = _getPrototypeOf(Derived),result;if (hasNativeReflectConstruct) {var NewTarget = _getPrototypeOf(this).constructor;result = Reflect.construct(Super, arguments, NewTarget);} else {result = Super.apply(this, arguments);}return _possibleConstructorReturn(this, result);};}function _possibleConstructorReturn(self, call) {if (call && (_typeof(call) === \"object\" || typeof call === \"function\")) {return call;}return _assertThisInitialized(self);}function _assertThisInitialized(self) {if (self === void 0) {throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");}return self;}function _isNativeReflectConstruct() {if (typeof Reflect === \"undefined\" || !Reflect.construct) return false;if (Reflect.construct.sham) return false;if (typeof Proxy === \"function\") return true;try {Date.prototype.toString.call(Reflect.construct(Date, [], function () {}));return true;} catch (e) {return false;}}function _getPrototypeOf(o) {_getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {return o.__proto__ || Object.getPrototypeOf(o);};return _getPrototypeOf(o);}import SplitViewResizeHandler from './SplitViewResizeHandler';var\n\nSplitViewVerticalHandler = /*#__PURE__*/function (_SplitViewResizeHandl) {_inherits(SplitViewVerticalHandler, _SplitViewResizeHandl);var _super = _createSuper(SplitViewVerticalHandler);function SplitViewVerticalHandler() {_classCallCheck(this, SplitViewVerticalHandler);return _super.apply(this, arguments);}_createClass(SplitViewVerticalHandler, [{ key: \"initResizeHandlerElement\", value: function initResizeHandlerElement()\n\n    {\n      _get(_getPrototypeOf(SplitViewVerticalHandler.prototype), \"initResizeHandlerElement\", this).call(this);\n\n      this.resizeHandlerElement.classList.add('vertical');\n      this.handlerSplitLine.classList.add('vertical');\n\n      this.resizeHandlerElement.style.width = \"\".concat(this.margin, \"px\");\n    } }, { key: \"getTargetWidthPercentage\", value: function getTargetWidthPercentage(\n\n    e, rect) {\n      var adjustedMousePos = e.pageX - rect.left;\n      var targetWidthPercentage = adjustedMousePos / rect.width * 100;\n\n      return targetWidthPercentage;\n    } }, { key: \"setPosition\", value: function setPosition(\n\n    percentage) {\n      this.resizeHandlerElement.style.left = \"calc(\".concat(percentage, \"% - \").concat(this.margin / 2, \"px)\");\n    } }]);return SplitViewVerticalHandler;}(SplitViewResizeHandler);export { SplitViewVerticalHandler as default };","// extracted by mini-css-extract-plugin","// extracted by mini-css-extract-plugin","// extracted by mini-css-extract-plugin","// extracted by mini-css-extract-plugin","// extracted by mini-css-extract-plugin","// extracted by mini-css-extract-plugin","// extracted by mini-css-extract-plugin","// extracted by mini-css-extract-plugin","\nimport { ControlGroup } from \"../controls/ControlGroup\";\nimport { Control } from \"../controls/Control\";\n\n\n/**\n                                                * Core class representing a toolbar UI.\n                                                *\n                                                * It consists of {@link Autodesk.Viewing.UI.ControlGroup} that group controls by functionality.\n                                                * @alias Autodesk.Viewing.UI.ToolBar\n                                                * @param {string} id - The id for this toolbar.\n                                                * @param {object} [options] - An optional dictionary of options.\n                                                * @param {boolean} [options.collapsible=true] - Whether this toolbar is collapsible.\n                                                * @param {boolean} [options.alignVertically=false] - Whether this toolbar should be vertically positioned on the right side.\n                                                * @constructor\n                                                * @augments Autodesk.Viewing.UI.ControlGroup\n                                                * @memberof Autodesk.Viewing.UI\n                                                */\nexport function ToolBar(id, options) {\n  ControlGroup.call(this, id, options);\n\n  this.removeClass('adsk-control-group');\n  this.addClass('adsk-toolbar');\n\n  if (options && options.alignVertically) {\n    this.addClass('adsk-toolbar-vertical');\n  }\n}\n\n/**\n   * Enum for toolbar event IDs.\n   * @readonly\n   * @enum {String}\n   */\nToolBar.Event = {\n  // Inherited from Control\n  VISIBILITY_CHANGED: Control.Event.VISIBILITY_CHANGED,\n  COLLAPSED_CHANGED: Control.Event.COLLAPSED_CHANGED,\n\n  // Inherited from ControlGroup\n  CONTROL_ADDED: ControlGroup.Event.CONTROL_ADDED,\n  CONTROL_REMOVED: ControlGroup.Event.CONTROL_REMOVED,\n  SIZE_CHANGED: ControlGroup.Event.SIZE_CHANGED };\n\n\nToolBar.prototype = Object.create(ControlGroup.prototype);\nToolBar.prototype.constructor = ToolBar;","// Import al CSS files that bundle into `styles.css` \n\n// Themes\nimport \"./gui/themes/DarkTheme.css\";\nimport \"./gui/themes/DarkThemeHyperlink.css\";\nimport \"./gui/themes/Fonts.css\";\nimport \"./gui/themes/LightTheme.css\";\nimport \"./gui/themes/LightThemeHyperlink.css\";\nimport \"./gui/themes/BimTheme.css\";\nimport \"./gui/themes/AcsTheme.css\";\n\nimport \"./gui/icon-fonts/header.css\";\nimport \"./gui/icon-fonts/codes.css\";\nimport \"./gui/LoadingSpinner.css\";\nimport \"./gui/AlertBox.css\";\nimport \"./gui/HudMessage.css\";\nimport \"./gui/ContextMenu.css\";\nimport \"./gui/Panel.css\";\nimport \"./gui/ProgressBar.css\";\nimport \"./gui/Tree.css\";\nimport \"./gui/TreeOnDemand.css\";\nimport \"./gui/DockingPanel.css\";\nimport \"./gui/ModelStructurePanel.css\";\nimport \"./gui/ModelStructureTreeDelegate.css\";\nimport \"./gui/PropertyPanel.css\";\nimport \"./gui/SettingsPanel.css\";\nimport \"./gui/ViewerModelStructurePanel.css\";\nimport \"./gui/ViewerSettingsPanel.css\";\nimport \"./gui/toolbar/ToolBar.css\";\nimport \"./gui/controls/Control.css\";\nimport \"./gui/controls/ControlGroup.css\";\nimport \"./gui/controls/Button.css\";\nimport \"./gui/controls/ComboButton.css\";\nimport \"./gui/controls/Searchbox.css\";\nimport \"./gui/controls/Filterbox.css\";\nimport \"./gui/controls/SearchResults.css\";\nimport \"./gui/browser/browser.css\";\nimport \"./application/Viewer3D.css\";\nimport \"./gui/GuiViewer3D.css\";\nimport \"./gui/CommonWidgets.css\";","require(\"core-js/modules/es.symbol\");require(\"core-js/modules/es.symbol.description\");require(\"core-js/modules/es.symbol.async-iterator\");require(\"core-js/modules/es.symbol.has-instance\");require(\"core-js/modules/es.symbol.is-concat-spreadable\");require(\"core-js/modules/es.symbol.iterator\");require(\"core-js/modules/es.symbol.match\");require(\"core-js/modules/es.symbol.replace\");require(\"core-js/modules/es.symbol.search\");require(\"core-js/modules/es.symbol.species\");require(\"core-js/modules/es.symbol.split\");require(\"core-js/modules/es.symbol.to-primitive\");require(\"core-js/modules/es.symbol.to-string-tag\");require(\"core-js/modules/es.symbol.unscopables\");require(\"core-js/modules/es.array.concat\");require(\"core-js/modules/es.array.copy-within\");require(\"core-js/modules/es.array.every\");require(\"core-js/modules/es.array.fill\");require(\"core-js/modules/es.array.filter\");require(\"core-js/modules/es.array.find\");require(\"core-js/modules/es.array.find-index\");require(\"core-js/modules/es.array.flat\");require(\"core-js/modules/es.array.flat-map\");require(\"core-js/modules/es.array.for-each\");require(\"core-js/modules/es.array.from\");require(\"core-js/modules/es.array.includes\");require(\"core-js/modules/es.array.index-of\");require(\"core-js/modules/es.array.iterator\");require(\"core-js/modules/es.array.join\");require(\"core-js/modules/es.array.last-index-of\");require(\"core-js/modules/es.array.map\");require(\"core-js/modules/es.array.of\");require(\"core-js/modules/es.array.reduce\");require(\"core-js/modules/es.array.reduce-right\");require(\"core-js/modules/es.array.slice\");require(\"core-js/modules/es.array.some\");require(\"core-js/modules/es.array.sort\");require(\"core-js/modules/es.array.species\");require(\"core-js/modules/es.array.splice\");require(\"core-js/modules/es.array.unscopables.flat\");require(\"core-js/modules/es.array.unscopables.flat-map\");require(\"core-js/modules/es.array-buffer.constructor\");require(\"core-js/modules/es.date.to-primitive\");require(\"core-js/modules/es.function.has-instance\");require(\"core-js/modules/es.function.name\");require(\"core-js/modules/es.json.to-string-tag\");require(\"core-js/modules/es.map\");require(\"core-js/modules/es.math.acosh\");require(\"core-js/modules/es.math.asinh\");require(\"core-js/modules/es.math.atanh\");require(\"core-js/modules/es.math.cbrt\");require(\"core-js/modules/es.math.clz32\");require(\"core-js/modules/es.math.cosh\");require(\"core-js/modules/es.math.expm1\");require(\"core-js/modules/es.math.fround\");require(\"core-js/modules/es.math.hypot\");require(\"core-js/modules/es.math.imul\");require(\"core-js/modules/es.math.log10\");require(\"core-js/modules/es.math.log1p\");require(\"core-js/modules/es.math.log2\");require(\"core-js/modules/es.math.sign\");require(\"core-js/modules/es.math.sinh\");require(\"core-js/modules/es.math.tanh\");require(\"core-js/modules/es.math.to-string-tag\");require(\"core-js/modules/es.math.trunc\");require(\"core-js/modules/es.number.constructor\");require(\"core-js/modules/es.number.epsilon\");require(\"core-js/modules/es.number.is-finite\");require(\"core-js/modules/es.number.is-integer\");require(\"core-js/modules/es.number.is-nan\");require(\"core-js/modules/es.number.is-safe-integer\");require(\"core-js/modules/es.number.max-safe-integer\");require(\"core-js/modules/es.number.min-safe-integer\");require(\"core-js/modules/es.number.parse-float\");require(\"core-js/modules/es.number.parse-int\");require(\"core-js/modules/es.number.to-fixed\");require(\"core-js/modules/es.object.assign\");require(\"core-js/modules/es.object.define-getter\");require(\"core-js/modules/es.object.define-setter\");require(\"core-js/modules/es.object.entries\");require(\"core-js/modules/es.object.freeze\");require(\"core-js/modules/es.object.from-entries\");require(\"core-js/modules/es.object.get-own-property-descriptor\");require(\"core-js/modules/es.object.get-own-property-descriptors\");require(\"core-js/modules/es.object.get-own-property-names\");require(\"core-js/modules/es.object.get-prototype-of\");require(\"core-js/modules/es.object.is\");require(\"core-js/modules/es.object.is-extensible\");require(\"core-js/modules/es.object.is-frozen\");require(\"core-js/modules/es.object.is-sealed\");require(\"core-js/modules/es.object.keys\");require(\"core-js/modules/es.object.lookup-getter\");require(\"core-js/modules/es.object.lookup-setter\");require(\"core-js/modules/es.object.prevent-extensions\");require(\"core-js/modules/es.object.seal\");require(\"core-js/modules/es.object.to-string\");require(\"core-js/modules/es.object.values\");require(\"core-js/modules/es.promise\");require(\"core-js/modules/es.promise.finally\");require(\"core-js/modules/es.reflect.apply\");require(\"core-js/modules/es.reflect.construct\");require(\"core-js/modules/es.reflect.define-property\");require(\"core-js/modules/es.reflect.delete-property\");require(\"core-j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);require(\"core-js/modules/esnext.map.some\");require(\"core-js/modules/esnext.map.update\");require(\"core-js/modules/esnext.math.clamp\");require(\"core-js/modules/esnext.math.deg-per-rad\");require(\"core-js/modules/esnext.math.degrees\");require(\"core-js/modules/esnext.math.fscale\");require(\"core-js/modules/esnext.math.iaddh\");require(\"core-js/modules/esnext.math.imulh\");require(\"core-js/modules/esnext.math.isubh\");require(\"core-js/modules/esnext.math.rad-per-deg\");require(\"core-js/modules/esnext.math.radians\");require(\"core-js/modules/esnext.math.scale\");require(\"core-js/modules/esnext.math.seeded-prng\");require(\"core-js/modules/esnext.math.signbit\");require(\"core-js/modules/esnext.math.umulh\");require(\"core-js/modules/esnext.number.from-string\");require(\"core-js/modules/esnext.observable\");require(\"core-js/modules/esnext.promise.all-settled\");require(\"core-js/modules/esnext.promise.any\");require(\"core-js/modules/esnext.promise.try\");require(\"core-js/modules/esnext.reflect.define-metadata\");require(\"core-js/modules/esnext.reflect.delete-metadata\");require(\"core-js/modules/esnext.reflect.get-metadata\");require(\"core-js/modules/esnext.reflect.get-metadata-keys\");require(\"core-js/modules/esnext.reflect.get-own-metadata\");require(\"core-js/modules/esnext.reflect.get-own-metadata-keys\");require(\"core-js/modules/esnext.reflect.has-metadata\");require(\"core-js/modules/esnext.reflect.has-own-metadata\");require(\"core-js/modules/esnext.reflect.metadata\");require(\"core-js/modules/esnext.set.add-all\");require(\"core-js/modules/esnext.set.delete-all\");require(\"core-js/modules/esnext.set.difference\");require(\"core-js/modules/esnext.set.every\");require(\"core-js/modules/esnext.set.filter\");require(\"core-js/modules/esnext.set.find\");require(\"core-js/modules/esnext.set.from\");require(\"core-js/modules/esnext.set.intersection\");require(\"core-js/modules/esnext.set.is-disjoint-from\");require(\"core-js/modules/esnext.set.is-subset-of\");require(\"core-js/modules/esnext.set.is-superset-of\");require(\"core-js/modules/esnext.set.join\");require(\"core-js/modules/esnext.set.map\");require(\"core-js/modules/esnext.set.of\");require(\"core-js/modules/esnext.set.reduce\");require(\"core-js/modules/esnext.set.some\");require(\"core-js/modules/esnext.set.symmetric-difference\");require(\"core-js/modules/esnext.set.union\");require(\"core-js/modules/esnext.string.at\");require(\"core-js/modules/esnext.string.code-points\");require(\"core-js/modules/esnext.string.match-all\");require(\"core-js/modules/esnext.string.replace-all\");require(\"core-js/modules/esnext.symbol.dispose\");require(\"core-js/modules/esnext.symbol.observable\");require(\"core-js/modules/esnext.symbol.pattern-match\");require(\"core-js/modules/esnext.weak-map.delete-all\");require(\"core-js/modules/esnext.weak-map.from\");require(\"core-js/modules/esnext.weak-map.of\");require(\"core-js/modules/esnext.weak-set.add-all\");require(\"core-js/modules/esnext.weak-set.delete-all\");require(\"core-js/modules/esnext.weak-set.from\");require(\"core-js/modules/esnext.weak-set.of\");require(\"core-js/modules/web.dom-collections.for-each\");require(\"core-js/modules/web.dom-collections.iterator\");require(\"core-js/modules/web.immediate\");require(\"core-js/modules/web.queue-microtask\");require(\"core-js/modules/web.url\");require(\"core-js/modules/web.url.to-json\");require(\"core-js/modules/web.url-search-params\");\n\nrequire(\"regenerator-runtime/runtime\");\n\n//Initializes the global Autodesk namespace, required by GUI and  extensions\n//Also exports the Autodesk namespace from the node module for new/future code to use.\nmodule.exports.Autodesk = require('./module-prefix').Autodesk;\n\nfunction _export(m, ns) {\n  for (var prop in m) {\n    if (m.hasOwnProperty(prop)) {\n      //Export directly into the module (e.g. for node.js use, where LMV is used via require instead from global namespace)\n      module.exports[prop] = m[prop];\n\n      //Export into the desired viewer namespace\n      if (ns)\n      module.exports[ns][prop] = m[prop];\n    }\n  }\n}\n\nvar _extend = Object.assign || function (target, source) {\n  for (var prop in source) {\n    if (source.hasOwnProperty(prop)) {\n      target[prop] = source[prop];\n    }\n  }\n};\n\n\n//Add the global exports to expose the libraries to code that's not yet modular.\nmodule.exports.THREE = require('three');\n\n//Create the two target namespaces for the module exports\n//This is mostly for backwards API compatibility, telling which\n//global namespace to put each export in once included from the web build.\nmodule.exports.av = {};\nmodule.exports.avp = {};\nmodule.exports.avu = {};\nmodule.exports.ave = {};\n\n\n//We will need to export Hammer to the global namespace because it's used\n//by various extensions\n//Hammer does not work on Node because it references window and document\nif (BUILD_FLAG__BUILD_TYPE !== 'NodeJs') {\n  var Hammer = require('../thirdparty/hammer/hammer.js');\n  //Also Hammer sets module.exports to itself, which fools our _export function,\n  //so we wrap it in an object.\n  _export({ Hammer: Hammer }, \"av\");\n}\n\n//TODO_TS: stuff from compat/globas/envinit goes into both namespaces because they\n//contain a mix of public and private exports,\n//make it cosistent in client code, then remove one of those\n_export(require(\"./compat\"), \"av\");\n_export(require(\"./compat\"), \"avp\");\n_export(require(\"./globals\"), \"avp\");\n_export(require(\"./globals\"), \"av\");\n\n// Analytics\n_export(require(\"./analytics/providers/interface\"), \"avp\");\n_export(require(\"./analytics/providers/providersExtensions\"), \"avp\");\n_export(require(\"./analytics\"), \"avp\");\n\n\n_export(require(\"./envinit\"), \"avp\");\n_export(require(\"./envinit\"), \"av\");\n\n\n_export(require(\"./resource-loader\"), \"avp\");\n_export(require(\"./globalization/i18init\"), \"avp\");\n_export(require(\"./globalization/i18next\"), \"av\");\n_export(require(\"./globalization/langs\"), \"avp\");\n\n\n_export(require(\"./logger/Logger\"), \"avp\");\n\n_export(require(\"./wgs/globals\"), \"avp\");\n\n_export(require(\"./wgs/render/GroundReflection\"), \"avp\");\n_export(require(\"./wgs/render/GroundShadow\"), \"avp\");\n_export(require(\"./wgs/render/WebGLShader\"), \"avp\");\n_export(require(\"./wgs/render/PhongShader\"), \"avp\");\n_export(require(\"./wgs/render/BasicShader\"), \"avp\");\n_export(require(\"./wgs/render/DecodeEnvMap\"), \"avp\");\n_export(require(\"./wgs/render/ShaderChunks\"), \"avp\");\n_export(require(\"./wgs/render/SAOShader\"), \"avp\");\n_export(require(\"./wgs/render/ShaderPass\"), \"avp\");\n_export(require(\"./wgs/render/CelShader\"), \"avp\");\n_export(require(\"./wgs/render/CopyShader\"), \"avp\");\n_export(require(\"./wgs/render/RenderContextPostProcess\"), \"avp\");\n_export(require(\"./wgs/render/LineStyleDef\"), \"avp\");\n_export(require(\"./wgs/render/HalfFloat\"), \"avp\");\n_export(require(\"./wgs/render/ShaderUtils\"), \"avp\");\n_export(require(\"./wgs/render/WebGLProgram\"), \"avp\");\n_export(require(\"./wgs/render/PrismUtil\"), \"avp\");\n_export(require(\"./wgs/render/ShadowMap\"), \"avp\");\n_export(require(\"./wgs/render/MaterialConverterCommon\"), \"avp\");\n_export(require(\"./wgs/render/MaterialConverter\"), \"avp\");\n_export(require(\"./wgs/render/MaterialManager\"), \"avp\");\n_export(require(\"./wgs/render/RenderContext\"), \"avp\");\n_export(require(\"./wgs/render/WebGLRenderer\"), \"avp\");\n_export(require(\"./wgs/render/GroundFlags\"), \"avp\");\n\n_export(require(\"./wgs/scene/MeshFlags\"), \"avp\");\n_export(require(\"./wgs/scene/RenderFlags\"), \"avp\");\n_export(require(\"./wgs/scene/ResetFlags\"), \"avp\");\n_export(require(\"./wgs/scene/LmvVector3\"), \"avp\");\n_export(require(\"./wgs/scene/LmvMatrix4\"), \"avp\");\n_export(require(\"./wgs/scene/LmvBox3\"), \"avp\");\n_export(require(\"./wgs/scene/VertexEnumerator\"), \"avp\");\n_export(require(\"./wgs/scene/VertexBufferReader\"), \"avp\");\n_export(require(\"./wgs/scene/DeriveTopology\"), \"avp\");\n_export(require(\"./wgs/scene/VBIntersector\"), \"avp\");\n_export(require(\"./wgs/scene/GeometryList\"), \"avp\");\n_export(require(\"./wgs/scene/RenderBatch\"), \"avp\");\n_export(require(\"./wgs/scene/ModelIteratorLinear\"), \"avp\");\n_export(require(\"./wgs/scene/ModelIteratorBVH\"), \"avp\");\n_export(require(\"./wgs/scene/BufferGeometry\"), \"avp\");\n_export(require(\"./wgs/scene/RenderScene\"), \"avp\");\n_export(require(\"./wgs/scene/SortedList\"), \"avp\");\n_export(require(\"./wgs/scene/RenderModel\"), \"avp\");\n_export(require(\"./wgs/scene/FrustumIntersector\"), \"avp\");\n_export(require(\"./wgs/scene/FragmentList\"), \"avp\");\n_export(require(\"./wgs/scene/SelectionMode\"), \"av\");\n_export(require(\"./wgs/scene/InstanceTree\"), \"avp\");\n_export(require(\"./wgs/scene/InstanceTreeStorage\"), \"avp\");\n_export(require(\"./wgs/scene/BVHBuilder\"), \"avp\");\n_export(require(\"./wgs/scene/SceneMath\"), \"avp\");\n\n_export(require(\"./wgs/scene/leaflet/TileCoords\"), \"avp\");\n_export(require(\"./wgs/scene/leaflet/ModelIteratorTexQuad\"), \"avp\");\n\n//TODO: Do all these need to be exported or just the entry point?\n_export(require(\"./wgs/scene/consolidation/FragmentListConsolidation\"), \"avp\"); // name exported differs\n_export(require(\"./wgs/scene/consolidation/ConsolidationIterator\"), \"avp\");\n_export(require(\"./wgs/scene/consolidation/InstanceBufferBuilder\"), \"avp\");\n_export(require(\"./wgs/scene/consolidation/Consolidation\"), \"avp\");\n_export(require(\"./wgs/scene/consolidation/GeomMergeTask\"), \"avp\");\n\n\n_export(require(\"./file-loaders/lmvtk/common/VertexBufferBuilder\"), \"avp\");\n_export(require(\"./file-loaders/lmvtk/otg/OtgGeomCodec\"), \"avp\");\n\n//Common networking\n_export(require(\"./file-loaders/net/ErrorCodes\"), \"av\");\n_export(require(\"./file-loaders/net/endpoints\"), \"av\");\n_export(require(\"./file-loaders/net/Xhr\"), \"avp\");\n_export(require(\"./net/MessageClient\"), \"avp\");\n_export(require(\"./net/LiveReviewClient\"), \"avp\");\n\n_export(require(\"../thirdparty/three.js/DDSLoader\"), \"avp\");\n//_export(require(\"../thirdparty/three.js/PVRLoader\"), \"avp\");\n\n//Application layers\n_export(require(\"./application/FileLoaderManager\"), \"av\");\n_export(require(\"./application/bubble\"), \"av\");\n_export(require(\"./application/EventDispatcher\"), \"av\");\n_export(require(\"./application/Extension\"), \"av\");\n_export(require(\"./application/ExtensionManager\"), \"av\");\n_export(require(\"./application/FileLoader\"), \"av\");\n_export(require(\"./application/EventTypes\"), \"av\");\n_export(require(\"./application/EventUtils\"), \"av\");\n_export(require(\"./application/ScreenModeDelegate\"), \"av\");\n_export(require(\"./application/LightPresets\"), \"avp\");\n_export(require(\"./application/ModelLayers\"), \"avp\");\n_export(require(\"./application/LocalStorage\"), \"avp\");\n_export(require(\"./application/Model\"), \"av\");\n_export(require(\"./application/Document\"), \"av\");\n_export(require(\"./application/Preferences\"), \"avp\");\n_export(require(\"./application/PreferenceNames\"), \"avp\");\n_export(require(\"./application/Profile\"), \"av\");\n_export(require(\"./application/ProfileSettings\"), \"av\");\n_export(require(\"./application/Viewer3D.js\"), \"av\");\n_export(require(\"./application/Viewer3DImpl\"), \"avp\");\n_export(require(\"./application/ViewerState\"), \"avp\");\n_export(require(\"./application/ModelMemoryTracker\"), \"av\");\n_export(require(\"./application/ScreenShot\"), \"av\");\n_export(require(\"./application/Thumbnails\"), \"av\");\n_export(require(\"./application/AggregatedView\"), \"av\");\n_export(require(\"./application/OverlayManager\"), \"av\");\n_export(require(\"./application/CameraLS\"), \"av\");\n_export(require(\"./application/ProfileManager\"), \"av\");\n_export(require(\"./application/DynamicGlobalOffset\"), \"av\");\n\n//Icky reconstruction of the MeasureCommon namespace from its interdependent modules.\n_export(require('./measurement/UnitFormatter'), \"avp\");\n_export(require('./measurement/UnitParser'), \"avp\");\n_export(require('./measurement/PDFUtils'), \"av\");\n_export(require('./measurement/DisplayUnits'), \"avp\");\n\nvar mc = module.exports.av.MeasureCommon = {};\n_extend(mc, require('./measurement/MeasureCommon'));\nmc.MeasurementTypes = require('./measurement/MeasurementTypes').MeasurementTypes;\nmc.SnapType = require('./measurement/SnapTypes').SnapType;\nmc.Events = require('./measurement/MeasureEvents').MeasureEvents;\nmc.Measurement = require('./measurement/Measurement').Measurement;\nmc.SnapResult = require('./measurement/SnapResult').SnapResult;\n\n// GlobalManager\n_export(require('./application/GlobalManager'), \"av\");\n_export(require('./application/GlobalManagerMixin'), \"av\");\n\n//Animation\n_export(require(\"./animation/Animation\"), \"avp\");\n_export(require(\"./animation/KeyFrameAnimator\"), \"avp\");\n_export(require(\"./animation/type/MeshAnimation\"), \"avp\");\n\n//Tools\n_export(require(\"./tools/Navigation\"), \"av\");\n_export(require(\"./tools/UnifiedCamera\"), \"av\");\n_export(require(\"./tools/Selector\"), \"avp\");\n_export(require(\"./tools/SelectionType\"), \"av\");\n_export(require(\"./tools/VisibilityManager\"), \"avp\");\n_export(require(\"./tools/KeyCode\"), \"av\");\n_export(require(\"./tools/ToolController\"), \"av\");\n_export(require(\"./tools/HotkeyManager\"), \"av\");\n_export(require(\"./tools/DefaultHandler\"), \"av\");\n_export(require(\"./tools/ViewingUtilities\"), \"av\");\n_export(require(\"./tools/GestureHandler\"), \"av\");\n_export(require(\"./tools/ToolInterface\"), \"av\");\n_export(require(\"./tools/OrbitDollyPanTool\"), \"av\");\n_export(require(\"./tools/HotGestureTool\"), \"av\");\n_export(require(\"./tools/FovTool\"), \"av\");\n_export(require(\"./tools/WorldUpTool\"), \"av\");\n_export(require(\"./tools/autocam/Autocam\"), \"av\");\n_export(require(\"./tools/viewtransitions/ViewTransition\"), \"avp\");\n\n// Loaders\n\n_export(require(\"./file-loaders/main/SvfLoader\"), \"avp\");\n_export(require(\"./file-loaders/main/F2DLoader\"), \"avp\");\n_export(require(\"./file-loaders/main/LeafletLoader\"), \"avp\");\n_export(require(\"./file-loaders/main/PropDbLoader\"), \"avp\");\n_export(require(\"./file-loaders/main/TextureLoader\"), \"avp\");\n_export(require(\"./file-loaders/main/OtgLoader\"), \"avp\");\n_export(require(\"./file-loaders/main/OtgResourceCache\"), \"avp\");\n_export(require(\"./file-loaders/main/Empty2DModelLoader\"), \"avp\");\n\nif (BUILD_FLAG__BUILD_TYPE === 'NodeJs') {\n  _export(require(\"./file-loaders/lmvtk/otg/OtgWebSocket\"), \"avp\");\n}\n\n_export(require(\"./file-loaders/main/WorkerCreator\"), \"avp\");\n\n_export(require(\"./application/ProgressState\"), \"av\");\n\n_export(require(\"./mobile/MobileCallbacks\"), \"av\");\n\nif (BUILD_FLAG__WASM_SUPPORT) {\n  _export(require(\"./file-loaders/main/WorkerCreatorWasm\"), \"avp\");\n  _export(require(\"./wasm/Wasm.js\"), \"avp\");\n}\n\nif (BUILD_FLAG__WANT_GUI) {\n  // Bundle CSS files into a single one.\n  require('./index-css');\n  //TODO: probably not all of these need to be explicitly exported now\n  _export(require(\"./gui/LoadingSpinner\"), \"avu\");\n  _export(require(\"./gui/Tree\"), \"avu\");\n  _export(require(\"./gui/TreeDelegate\"), \"avu\");\n  _export(require(\"./gui/TreeOnDemand\"), \"avu\");\n  _export(require(\"./gui/CommonWidgets\"), \"avp\");\n  _export(require(\"./gui/DataTable\"), \"avu\");\n  _export(require(\"./gui/DockingPanel.js\"), \"avu\");\n  _export(require(\"./gui/ContextMenu\"), \"avp\");\n  _export(require(\"./gui/browser/browser\"), \"avp\");\n  _export(require(\"./gui/AlertBox\"), \"avp\");\n  _export(require(\"./gui/ErrorHandler\"), \"avp\");\n  _export(require(\"./gui/ModelStructurePanel\"), \"avu\");\n  _export(require(\"./gui/PropertyPanel\"), \"avu\");\n  _export(require(\"./gui/ObjectContextMenu\"), \"avu\");\n  _export(require(\"./gui/ProgressBar\"), \"avp\"); //TODO: remove from export\n  _export(require(\"./gui/ViewerPanelMixin\"), \"ave\"); //TODO: mode to avu namespace\n  _export(require(\"./gui/controls/Control\"), \"avu\");\n  _export(require(\"./gui/controls/ControlGroup\"), \"avu\");\n  _export(require(\"./gui/controls/Button\"), \"avu\");\n  _export(require(\"./gui/controls/RadioButtonGroup\"), \"avu\");\n  _export(require(\"./gui/controls/ComboButton\"), \"avu\");\n  _export(require(\"./gui/toolbar/ToolBar\"), \"avu\");\n  _export(require(\"./gui/HudMessage\"), \"avp\");\n  _export(require(\"./gui/SettingsPanel\"), \"avu\");\n  _export(require(\"./gui/controls/Filterbox\"), \"avu\");\n  _export(require(\"./gui/controls/Searchbox\"), \"avu\");\n  _export(require(\"./gui/RenderOptionsPanel\"), \"avp\");\n  _export(require(\"./gui/ViewerModelStructurePanel\"), \"ave\"); //TODO: mode to avu namespace\n  _export(require(\"./gui/ViewerPropertyPanel\"), \"ave\"); //TODO: mode to avu namespace\n  _export(require(\"./gui/ViewerSettingsPanel\"), \"ave\"); //TODO: mode to avu namespace\n  _export(require(\"./gui/ViewerObjectContextMenu\"), \"ave\"); //TODO: mode to avu namespace\n  _export(require(\"./gui/GuiViewerToolbarConst\"), \"av\");\n  _export(require(\"./gui/GuiViewer3D\"), \"av\");\n  _export(require(\"./gui/splitview-layout/SplitViewLayout\"), \"avu\");\n\n  // Include built in extensions  \n  _export(require(\"../extensions/builtinExtensions\"), \"av\");\n}\n\n// Multi-Viewer\n_export(require(\"./leech-viewer/MultiViewerFactory\"), \"av\");\n_export(require(\"./leech-viewer/LeechViewer\"), \"av\");\n_export(require(\"./leech-viewer/CrossViewerInteractionCommon\"), \"av\");\n\n\n// Register extensions bundled into their own JS files\n_export(require(\"../extensions/registerExternalExtensions\"), \"avp\");\n\n// Search\n_export(require(\"./search/SearchManager\"), \"av\");\n\nrequire(\"./module-suffix\").initializeLegacyNamespaces(module.exports);\n\n// MaterialConverterPrism needs to be bundled for nodejs build\n// for DiffTool unit tests that load an svf\nif (BUILD_FLAG__BUILD_TYPE === 'NodeJs') {\n  // MaterialConverterPrism uses av.xxx, which is only available after the call to initializeLegacyNamespaces above\n  var MaterialConverterPrism = require(\"../extensions/MaterialConverterPrism/MaterialConverterPrism\");\n  _export({ MaterialConverterPrism: MaterialConverterPrism }, \"av\");\n  Autodesk.Viewing['MaterialConverterPrism'] = MaterialConverterPrism;\n}","import * as et from \"../application/EventTypes\";\n\n// Add here common viewer interactions.\n// Some basic examples are object selection sync, camera sync and so on...\n\n// Sync selected objects between viewers.\nvar onSelectionChanged = {\n  eventName: et.AGGREGATE_SELECTION_CHANGED_EVENT,\n  cb: function cb(sourceViewer, targetViewer, event) {\n    var curModelsSelSet = sourceViewer.getAggregateSelection();\n\n    if (targetViewer.impl.model) {\n      if (curModelsSelSet.length > 0) {\n        for (var i = 0; i < curModelsSelSet.length; i++) {\n          var curModelSelSet = curModelsSelSet[i];\n          var selectedModel = curModelSelSet.model;\n          var curSelSet = curModelSelSet.selection;\n\n          for (var j = 0; j < targetViewer.impl.modelQueue().getModels().length; j++) {\n            var modeltargetViewer = targetViewer.impl.modelQueue().getModels()[j];\n            if (modeltargetViewer && modeltargetViewer.getDocumentNode() && selectedModel.getDocumentNode() &&\n            modeltargetViewer.getDocumentNode().originModel === selectedModel.getDocumentNode().originModel) {\n\n              if (targetViewer.impl.is2d) {\n                targetViewer.select(curSelSet, modeltargetViewer);\n              } else {\n                targetViewer.showAll();\n                targetViewer.select(curSelSet, modeltargetViewer);\n                targetViewer.isolate(curSelSet, modeltargetViewer);\n              }\n\n              targetViewer.fitToView(curSelSet);\n            } else if (!targetViewer.impl.is2d && modeltargetViewer.visibilityManager) {\n              // hide all objects in the other models\n              modeltargetViewer.visibilityManager.setAllVisibility(false);\n            }\n          }\n        }\n      } else {\n        targetViewer.clearSelection();\n        if (!targetViewer.impl.is2d) {\n          targetViewer.showAll();\n        }\n      }\n    }\n  } };\n\n\nexport var CrossViewerInteractionCommon = {\n  onSelectionChanged: onSelectionChanged };","function _toConsumableArray(arr) {return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread();}function _nonIterableSpread() {throw new TypeError(\"Invalid attempt to spread non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\");}function _unsupportedIterableToArray(o, minLen) {if (!o) return;if (typeof o === \"string\") return _arrayLikeToArray(o, minLen);var n = Object.prototype.toString.call(o).slice(8, -1);if (n === \"Object\" && o.constructor) n = o.constructor.name;if (n === \"Map\" || n === \"Set\") return Array.from(o);if (n === \"Arguments\" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);}function _iterableToArray(iter) {if (typeof Symbol !== \"undefined\" && Symbol.iterator in Object(iter)) return Array.from(iter);}function _arrayWithoutHoles(arr) {if (Array.isArray(arr)) return _arrayLikeToArray(arr);}function _arrayLikeToArray(arr, len) {if (len == null || len > arr.length) len = arr.length;for (var i = 0, arr2 = new Array(len); i < len; i++) {arr2[i] = arr[i];}return arr2;}import LeechViewerRenderContext from './LeechViewerRenderContext';\nimport { DefaultLightPreset2d, DefaultLightPreset } from \"../application/LightPresets\";\nimport ResizeObserver from '../../thirdparty/resize-observer-polyfill/ResizeObserver.min.js';\n\n// LeechViewer is a regular viewer, that lets you share resources (Models, Geometries & Materials) with other viewers.\n// After rendering a frame, the result gets copied into the LeechViewer's canvas.\nvar protoCache = new Map();\n\n// In order to support the ability to dynamically decide which ViewerClass to use, I had to wrap the initialization of the LeechViewer prototype in a function.\nexport function createLeechViewer(container, config, sharedResources, ViewerClass) {\n\n  // In order to still share prototypes between different instances of leech viewers, we save the prototype in a cache.\n  if (protoCache.has(ViewerClass)) {\n    var proto = protoCache.get(ViewerClass);\n    return new proto(container, config, sharedResources);\n  }\n\n  function LeechViewer(container) {var _this = this;var config = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};var sharedResources = arguments.length > 2 ? arguments[2] : undefined;\n    this.sharedResources = sharedResources;\n    this.loadingIntervals = {};\n\n    ViewerClass.call(this, container, config);\n\n    this.renderContext = new LeechViewerRenderContext(this.canvas);\n\n    this.originalLoadDocumentNode = this.loadDocumentNode.bind(this);\n\n    if (this.sharedResources.mrtFlags) {\n      // Needed in order to sync the ID targets usage of the renderer.\n      this.renderContext.mrtFlags = this.sharedResources.mrtFlags;\n    } else {\n      // save mrtFlags for the next leechViewer to use.\n      this.sharedResources.mrtFlags = this.renderContext.mrtFlags;\n    }\n\n    this.resizeObserver = new ResizeObserver(function (entries) {\n      var rect = entries[0].contentRect;\n      var width = Math.floor(rect.width);\n      var height = Math.floor(rect.height);\n\n      // In case someone removed the viewer's container before properly destroyed the viewer.\n      // In that case, we have to skip the rendering of that last frame - or we'll get tons of errors.\n      if (!width || !height) {\n        // Do not consider it as an error. It is not necessarily an error if the client app temporarily\n        // hides the viewer canvas without deleting everything each time.\n        return;\n      }\n\n      _this.impl.resize(width, height, true);\n\n      _this.dispatchEvent({\n        type: Autodesk.Viewing.VIEWER_RESIZE_EVENT,\n        width: width,\n        height: height });\n\n\n      _this.impl.tick(performance.now());\n    });\n\n    this.resizeObserver.observe(this.container);\n  }\n\n  LeechViewer.prototype = Object.create(ViewerClass.prototype);\n  LeechViewer.prototype.constructor = LeechViewer;\n\n  LeechViewer.prototype.initialize = function () {var initOptions = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n    var leechViewerInitOptions = {\n      glrenderer: this.sharedResources.glrenderer,\n      materialManager: this.sharedResources.materialManager,\n      renderer: this.renderContext };\n\n\n    var options = Object.assign({}, initOptions, leechViewerInitOptions);\n\n    var nopViewerBackup = this.getWindow().NOP_VIEWER;\n\n    var viewerErrorCode = ViewerClass.prototype.initialize.call(this, options);\n\n    if (nopViewerBackup) {\n      this.getWindow().NOP_VIEWER = nopViewerBackup;\n    }\n\n    this.overrideAPIs();\n\n    if (this.sharedResources.geomCache && this.sharedResources.geomCache.initialized) {\n      this.impl.setGeomCache(this.sharedResources.geomCache);\n    }\n\n    return viewerErrorCode;\n  };\n\n  LeechViewer.prototype.uninitialize = function () {var _this2 = this;\n    if (this.resizeObserver) {\n      this.resizeObserver.disconnect();\n      this.resizeObserver = null;\n    }\n\n    Object.keys(this.loadingIntervals).forEach(function (key) {\n      _this2.clearLoadingInterval(key);\n    });\n\n    ViewerClass.prototype.uninitialize.call(this);\n  };\n\n  function generateKey(node, options) {\n    var key = node.getModelKey();\n\n    // Add options that can generate different geometry to unique key\n    key += '.ref:' + !!options.applyRefPoint;\n\n    if (options.globalOffset) {\n      var arr = [options.globalOffset.x, options.globalOffset.y, options.globalOffset.z];\n      key += '.g:' + arr.toString();\n    }\n\n    if (options.placementTransform) {\n      key += '.p:' + options.placementTransform.toArray().toString();\n    }\n\n    if (options.customHash) {\n      key += '.h:' + options.customHash;\n    }\n\n    return key;\n  }\n\n  // Override functions that need a special treatment in order to support shared renderer.\n  LeechViewer.prototype.overrideAPIs = function () {var _this3 = this;\n    // Before each tick, make sure the viewport is set to the right size.\n    var originalTick = this.impl.tick.bind(this.impl);\n    this.impl.tick = function () {\n      _this3.impl.renderer().prepareViewport();\n      // we pass the current time instead of the original argument from the tick function, because we want to take into consideration that other\n      // viewers worked before this tick, on the same frame.\n      var timestamp = performance.now();\n      originalTick(timestamp);\n      _this3.impl.renderer().restoreViewport();\n    };\n\n    // Only after renderPresented is done, copy the render target into the LeechViewer's canvas.\n    // Priority is set to -1000, so in case of other event-listeners that should render to the target too, they'll do that prior to this.\n    this.addEventListener(Autodesk.Viewing.RENDER_PRESENTED_EVENT, function () {\n      _this3.renderContext.renderToCanvas();\n    }, { priority: -1000 });\n\n    var originalSetLightPreset = this.impl.setLightPreset.bind(this.impl);\n    this.impl.setLightPreset = function (index, force, callback) {\n      if (_this3.impl.is2d) {\n        // In case of 2d, don't call `setLightPreset`, because it can unload 3D material resources that being used by other viewers.\n        // Only set the background according to the light preset.\n        _this3.impl.initLights();\n        var bgColor2d = Autodesk.Viewing.Private.LightPresets[index].bgColorGradient;\n        _this3.setBackgroundColor.apply(_this3, _toConsumableArray(bgColor2d));\n        _this3.impl.setCurrentLightPreset(index);\n        var cubeMap = _this3.impl.loadCubeMapFromColors(_this3.impl.clearColorTop, _this3.impl.clearColorBottom);\n        _this3.impl.renderer().setCubeMap(cubeMap);\n      } else {\n        originalSetLightPreset(index, force, callback);\n      }\n    };\n\n    this.impl.onBeforeRender = function (workThisTick) {\n      if (workThisTick) {\n        _this3.restoreViewerState();\n      }\n    };\n\n    // Needed in order to restore cutplanes before selecting an object\n    var originalInvokeStack = this.toolController.__invokeStack.bind(this.toolController);\n    this.toolController.__invokeStack = function () {\n      _this3.restoreViewerState();\n      return originalInvokeStack.apply(void 0, arguments);\n    };\n\n    // Whenever unloadModel is called for a viewer, we want to make sure that it's resources are not being\n    // used by other viewers. In that case, use keepResources flag to prevent disposing them.\n    var originalUnloadModel = this.impl.unloadModel.bind(this.impl);\n    this.impl.unloadModel = function (model) {\n      var modelKey = model.leechViewerKey;\n\n      var keepResources = false;\n\n      // If model is not in loadedModels, it's a sign that it wasn't loaded, or it wasn't loaded using loadDocumentNode.    \n      var modelItem = _this3.sharedResources.loadedModels[modelKey];\n\n      if (modelItem) {\n        modelItem.usedByViewersCounter--;\n        keepResources = modelItem.forceKeepResources || modelItem.usedByViewersCounter > 0;\n\n        if (!keepResources) {\n          delete _this3.sharedResources.loadedModels[modelKey];\n        }\n      }\n\n      _this3.clearLoadingInterval(modelKey);\n\n      return originalUnloadModel(model, keepResources);\n    };\n\n    // When loading a model, make sure to check if it's already loaded by another viewer.\n    this.loadDocumentNode = function (avDocument, manifestNode) {var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};\n      return new Promise(function (resolve, reject) {\n        var key = generateKey(manifestNode, options);\n\n        // Model already loaded\n        var modelItem = _this3.sharedResources.loadedModels[key];\n\n        if (modelItem) {\n          var model = _this3.onModelLoaded(modelItem.model, options);\n          resolve(model);\n        } else {\n          // If model is not loaded yet, load it, and cache it before resolving.\n          _this3.originalLoadDocumentNode(avDocument, manifestNode, options).then(function (model) {\n            model.leechViewerKey = key;\n            _this3.sharedResources.loadedModels[key] = { model: model, usedByViewersCounter: 1, loadingViewer: _this3 };\n            resolve(model);\n          }).catch(reject);\n        }\n      });\n    };\n\n    var originalGeomCache = this.impl.geomCache.bind(this.impl);\n    this.impl.geomCache = function () {\n      if (!_this3.sharedResources.geomCache || !_this3.sharedResources.geomCache.initialized) {\n        _this3.sharedResources.geomCache = originalGeomCache();\n      }\n\n      return _this3.sharedResources.geomCache;\n    };\n  };\n\n  LeechViewer.prototype.setViewerProfile = function (model, options) {\n    if (options.loadAsHidden) {\n      return;\n    }\n\n    options.isAEC = model.isAEC();\n    var profile = this.chooseProfile(options);\n\n    // These settings change the model itself (not only the renderer settings).\n    // We delete here so the current model's state won't change.\n    delete profile.settings.lineRendering;\n    delete profile.settings.pointRendering;\n\n    this.setProfile(profile);\n  };\n\n  LeechViewer.prototype.setViewerLight = function (model, options) {\n    if (options.loadAsHidden) {\n      return;\n    }\n\n    // A fix for a case where one viewer has 3D model and on a different viewer a 2D model is loaded.\n    // In that case, the materials gets updated with a 2D preset, that makes it appear black.\n    if (this.impl.is2d) {\n\n      this.impl.setLightPreset(DefaultLightPreset2d);\n\n      var clearColorTopBackup = this.impl.clearColorTop.clone().multiplyScalar(255);\n      var clearColorBottomBackup = this.impl.clearColorBottom.clone().multiplyScalar(255);\n\n      if (options.isAEC) {\n        this.impl.setLightPresetForAec();\n      } else {\n        this.impl.setLightPreset(DefaultLightPreset);\n      }\n\n      this.impl.toggleEnvMapBackground(false);\n\n      this.setBackgroundColor(\n      clearColorTopBackup.x, clearColorTopBackup.y, clearColorTopBackup.z,\n      clearColorBottomBackup.x, clearColorBottomBackup.y, clearColorBottomBackup.z);\n\n    } else {\n      this.impl.toggleEnvMapBackground(this.profile.settings.envMapBackground);\n    }\n  };\n\n  LeechViewer.prototype.cleanViewerBeforeLoadModel = function (options) {\n    if (!options.keepCurrentModels && this.impl.hasModels()) {\n      var _conf = this.config;\n      this.tearDown();\n      this.setUp(_conf);\n    }\n\n    // Add spinner for first model\n    if (!this.impl.hasModels() && this._loadingSpinner) {\n      this._loadingSpinner.show();\n    }\n  };\n\n  var infiniteCutplane = new THREE.Vector4(0, 0, -1, -1e20);\n\n  // We can't use matman.setCutPlanes() every frame, because it sets needsUpdate for all the materials, which is super heavy.\n  // In order to skip that, we make sure that there is always at least one cutplane available, so materials include NUM_CUTPLANES > 0.\n  LeechViewer.prototype.updateCutPlanes = function () {\n    var cutplanes = this.impl.getAllCutPlanes() || [infiniteCutplane];\n    var materialManager = this.impl.matman();\n\n    var maxLength = Math.max(cutplanes.length, materialManager._cutplanes.length);\n\n    // Empty array\n    materialManager._cutplanes.length = 0;\n\n    var i = 0;\n\n    for (; i < cutplanes.length; i++) {\n      materialManager._cutplanes.push(cutplanes[i].clone());\n    }\n\n    // Fill cutplanes array according to the largest cutplanes array.\n    // This is needed because eventually, inside cutplanes.glsl you don't want to traverse over NUM_CUTPLANES with empty entries.\n    for (; i < maxLength; i++) {\n      materialManager._cutplanes.push(infiniteCutplane);\n    }\n\n    materialManager.forEach(function (mat) {\n      mat.cutplanes = materialManager._cutplanes;\n    }, false, true);\n  };\n\n  LeechViewer.prototype.restoreViewerState = function () {\n    if (this.sharedResources.lastRenderedViewer !== this) {\n      // Update cutplanes according to the current viewer.\n      this.updateCutPlanes();\n\n      // Needed for updated resolution for 2D shaders.\n      if (this.impl.is2d) {\n        this.impl.updateCameraMatrices();\n      }\n\n      // Finally, update last viewer that got rendered.\n      this.sharedResources.lastRenderedViewer = this;\n    }\n  };\n\n  LeechViewer.prototype.onModelLoaded = function (model, options) {\n    var key = model.leechViewerKey;\n\n    // forceKeepResources is being used here to make sure that while we cleanup the viewer,\n    // and unload the same model that we just want to clone - we'll keep its resources.\n    this.sharedResources.loadedModels[key].forceKeepResources = true;\n\n    this.cleanViewerBeforeLoadModel(options);\n    var modelClone = this.cloneModelToViewer(model);\n    this.addModelToViewer(modelClone, options);\n\n    delete this.sharedResources.loadedModels[key].forceKeepResources;\n\n    return modelClone;\n  };\n\n  LeechViewer.prototype.addModelToViewer = function (model, options) {\n    this.impl.modelQueue().addHiddenModel(model);\n\n    if (!options.loadAsHidden) {\n      this.setViewerProfile(model, options);\n      this.showModel(model);\n      this.setViewerLight(model, options);\n\n      if (!options.headlessViewer && this.createUI) {\n        this.createUI(model);\n      }\n    }\n\n    if (this._loadingSpinner) {\n      this._loadingSpinner.hide();\n    }\n\n  };\n\n  LeechViewer.prototype.clearLoadingInterval = function (key) {\n    if (this.loadingIntervals[key]) {\n      clearInterval(this.loadingIntervals[key]);\n      delete this.loadingIntervals[key];\n    }\n  };\n\n  // Returns true if all pending loading is finished. More concrete, it means that there is no...\n  //  - model-root loading\n  //  - geometry loading, or\n  //  - propDbLoading\n  // pending or in progress.\n  function isModelLoadDone(model) {\n    var modelRootPending = !model;\n    var geomPending = model && !model.isLoadDone();\n    var propDbPending = model && model.getPropertyDb() && !model.getPropertyDb().isLoadDone();\n\n    if (modelRootPending || geomPending || propDbPending) {\n      return false;\n    }\n\n    return true;\n  }\n\n  // Returns a promise that resolves when isLoadDone() returns true.\n  function waitForLoadDone(viewer, model) {\n    return new Promise(function (resolve) {\n\n      if (isModelLoadDone(model)) {\n        resolve();\n      }\n\n      // On each load-relevant event, check if loading is finished.\n      var onEvent = function onEvent() {\n        if (!isModelLoadDone(model)) {\n          return;\n        }\n\n        viewer.removeEventListener(Autodesk.Viewing.GEOMETRY_LOADED_EVENT, onEvent);\n        viewer.removeEventListener(Autodesk.Viewing.OBJECT_TREE_CREATED_EVENT, onEvent);\n\n        resolve();\n      };\n\n      // register event listeners to try again if something changes\n      viewer.addEventListener(Autodesk.Viewing.GEOMETRY_LOADED_EVENT, onEvent);\n      viewer.addEventListener(Autodesk.Viewing.OBJECT_TREE_CREATED_EVENT, onEvent);\n    });\n  }\n\n  LeechViewer.prototype.cloneModelToViewer = function (model) {var _this4 = this;\n    // model.clone() returns a shallow copy of the model instance. All the internal state is shared between the models.\n    // The reason we can't use the exact same instance, and we have to clone it, is because of VisibilityManager & Selector.\n    // When a model is added to a viewer, the specific viewer instance is being used inside the selector, and\n    // every model can have a single Selector & VisibilityManager.\n    var modelClone = model.clone();\n\n    var key = model.leechViewerKey;\n    modelClone.leechViewerKey = key;\n\n    var modelItem = this.sharedResources.loadedModels[key];\n    modelItem.usedByViewersCounter++;\n    var loadingViewer = modelItem.loadingViewer;\n\n    // Until loading is done, keep refreshing the viewer, in order to mimic the invalidation inside the loaders.\n    // A better way to do that would be to dispatch an event on the loading viewer's `processReceivedMesh`.\n    this.clearLoadingInterval(key);\n\n    this.loadingIntervals[key] = setInterval(function () {\n      _this4.impl.invalidate(false, true, false);\n    }, 1000);\n\n    waitForLoadDone(loadingViewer, modelClone).then(function () {\n      _this4.clearLoadingInterval(key);\n\n      // onLoadComplete should be called after viewer.impl.addModel is called.\n      // The reason is that viewer.impl.is2d is being set only there.\n      // This timeout ensures it, and prevents a bug where 2D selection doesn't work (init2dSelection wasn't called because of that timing issue).\n      // onLoadComplete is an async method anyway - so there is no risk in delaying it like that.\n      setTimeout(function () {\n        modelClone.setInnerAttributes(model.getInnerAttributes()); // Need to re-sync because of consolidationIterator is being set only when model loading is done.\n        _this4.impl.onLoadComplete(modelClone);\n      }, 1);\n    });\n\n    return modelClone;\n  };\n\n  protoCache.set(ViewerClass, LeechViewer);\n\n  return new LeechViewer(container, config, sharedResources, ViewerClass);\n}","import { RenderContext } from \"../wgs/render/RenderContext\";\n\n// LeechViewerRenderContext uses a shared webglRenderer in order to render.\n// Instead of rendering directly into the canvas, render into webglRenderer's shared canvas (renderer.domElement),\n// and then copy it into a 2D canvas.\n\nexport default function LeechViewerRenderContext(canvas) {\n  Autodesk.Viewing.Private.RenderContext.call(this);\n\n  this.originalInit = this.init.bind(this);\n  this.init = function (glrenderer, width, height) {var options = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};\n    this.canvas = canvas;\n    this.ctx2D = this.canvas.getContext('2d');\n\n    // offscreen has to be set to true in order that setSize won't cause the renderer's canvas to scale on each frame.\n    var initOptions = Object.assign({}, options, { offscreen: true });\n\n    this.originalInit(glrenderer, width, height, initOptions);\n\n    this.glrenderer = glrenderer;\n\n    var pixelRatio = this.glrenderer.getPixelRatio();\n\n    this.setSize(width / pixelRatio, height / pixelRatio);\n  };\n\n  this.renderToCanvas = function () {\n    // Don't render on main canvas if the target was offscreen.\n    if (this.getOffscreenTarget()) {\n      return;\n    }\n\n    // Skip if canvas has zero-size. Otherwise, Safari crashes in drawImage\n    // with \"IndexSizeError: The index is not in the allowed range.\".\n    if (this.widthWithPixelRatio == 0 || this.heightWithPixelRatio == 0) {\n      return;\n    }\n\n    // consider using 'webgl' context in order to copy the output:\n    // https://webglfundamentals.org/webgl/lessons/webgl-2d-drawimage.html\n\n    // Clean canvas (needed in case the background is transparent)\n    this.ctx2D.clearRect(0, 0, this.widthWithPixelRatio, this.heightWithPixelRatio);\n\n    // Copy pixels from renderer's canvas to the viewer's 2D canvas.\n    this.ctx2D.drawImage(\n    this.glrenderer.domElement,\n    0, this.glrenderer.domElement.height - this.heightWithPixelRatio, // Copy only pixels that relevant to the current context.\n    // Renderer canvas might be bigger this the current viewer canvas.\n    this.widthWithPixelRatio, this.heightWithPixelRatio,\n    0, 0,\n    this.widthWithPixelRatio, this.heightWithPixelRatio);\n\n  };\n\n  this.originalSetSize = this.setSize.bind(this);\n  this.setSize = function (width, height, force, suppress) {\n    if (!suppress) {\n      var pixelRatio = this.glrenderer.getPixelRatio();\n\n      this.width = width;\n      this.height = height;\n      this.widthWithPixelRatio = width * pixelRatio;\n      this.heightWithPixelRatio = height * pixelRatio;\n\n      this.canvas.width = this.widthWithPixelRatio;\n      this.canvas.height = this.heightWithPixelRatio;\n      this.canvas.style.width = \"\".concat(this.width, \"px\");\n      this.canvas.style.height = \"\".concat(this.height, \"px\");\n    }\n\n    this.prepareViewport(force, suppress);\n    this.restoreViewport();\n  };\n\n  this.prepareViewport = function (force, suppress) {\n    this.glrenderer.pushViewport();\n\n    // Change glrenderer canvas size only if it needs to be larger.\n    // The heuristic is - expand the renderer's canvas dimensions according to the largest viewer's canvas dimensions.\n    var pixelRatio = this.glrenderer.getPixelRatio();\n    var rendererCanvasWidth = this.glrenderer.domElement.width / pixelRatio;\n    var rendererCanvasHeight = this.glrenderer.domElement.height / pixelRatio;\n\n    if (rendererCanvasWidth < this.width || rendererCanvasHeight < this.height) {\n      this.glrenderer.setSize(Math.max(this.width, rendererCanvasWidth), Math.max(this.height, rendererCanvasHeight));\n    }\n\n    this.originalSetSize(this.width, this.height, force, suppress);\n  };\n\n  this.restoreViewport = function () {\n    this.glrenderer.popViewport();\n  };\n}\n\nLeechViewerRenderContext.prototype = Object.create(RenderContext.prototype);\nLeechViewerRenderContext.prototype.constructor = LeechViewerRenderContext;","function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}import { createLeechViewer } from './LeechViewer';\nimport { MaterialManager } from \"../wgs/render/MaterialManager\";\n\n// MultiViewerFactory - encapsulates the creation leech viewer.\nexport var MultiViewerFactory = /*#__PURE__*/function () {\n  function MultiViewerFactory() {_classCallCheck(this, MultiViewerFactory);\n    var glrenderer = Autodesk.Viewing.Private.createRenderer(undefined, { alpha: true });\n    var materialManager = new MaterialManager(glrenderer);\n\n    // Map of all the models that are already loaded some viewer.\n    // Each item contains the model instance, and a counter of how many viewer's are using it.\n    var loadedModels = {};\n\n    this.sharedResources = {\n      glrenderer: glrenderer,\n      materialManager: materialManager,\n      loadedModels: loadedModels };\n\n  }_createClass(MultiViewerFactory, [{ key: \"createViewer\", value: function createViewer(\n\n    container, config) {var ViewerClass = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : Autodesk.Viewing.Viewer3D;\n      return createLeechViewer(container, config, this.sharedResources, ViewerClass);\n    } }]);return MultiViewerFactory;}();","\nimport { isTouchDevice, getGlobal } from \"../compat\";\nimport { isOffline, getEnv } from \"../file-loaders/net/endpoints\";\n\nvar global = getGlobal();\nvar _window = global;\n\n/**\n                       * Logging levels. Higher number means more verbose logs,\n                       * for example, with level 3, `info`, `warn`, or `error`\n                       * logs will show up in the console but `debug` and `log` won't.\n                       *\n                       * Semantics of specific levels:\n                       *  - debug: low-level debugging logs\n                       *  - log: common, higher-level debugging logs\n                       *  - info: helpful runtime information (even for stag/prod environments)\n                       *  - warn: potentially problematic situations; handled exceptions\n                       *  - error: definitely problematic situations; unhandled exceptions\n                       * @readonly\n                       * @enum {number}\n                       */\nexport var LogLevels = {\n  DEBUG: 5,\n  LOG: 4,\n  INFO: 3,\n  WARNING: 2,\n  ERROR: 1,\n  NONE: 0 };\n\n\n\n/**\n              * Logger class. \n              * Depending on options.logLevel setting in initilize function, corresponding functions would be activated.\n              */\nexport function Logger() {\n  this.runtimeStats = {};\n  this.level = -1;\n  this.setLevel(LogLevels.ERROR);\n  this._reportError = this._reportError.bind(this);\n}\n\n/**\n   * Initialize Logger object with options. \n   * \n   * @param {object}   [options] - Options object to configure the Logger.\n   * @param {function} [options.eventCallback] - An optional callback used for processing the log entry with properties like \"category\", \"timestamp\", etc. \n                                                 It can be used as for analytics tracking by filtering and listening to specific category users are interested. \n                                                 The expected argument is the user supplied entry object instrumented with \"timestamp\" and \"sessionId\" properties. \n   * @param {string}   [options.sessionId] - An optional id for each browser session. Default gets generated based on current time stamp if not specified. \n   * @param {number}   [options.logLevel] - An optional level to define the log level. Default is LogLevels.ERROR if not specified.\n   *\n   */\n\nLogger.prototype.initialize = function (options) {\n\n  if (options.eventCallback)\n  this.callback = options.eventCallback;\n\n  this.sessionId = options.sessionId;\n  if (!this.sessionId) {\n    var now = Date.now() + \"\";\n    this.sessionId = parseFloat((Math.random() * 10000 | 0) + \"\" + now.substring(4));\n  }\n\n  // Initialize log level is passed in\n  if (typeof options.logLevel === 'number') {\n    this.setLevel(options.logLevel);\n  }\n\n  this.environmentInfo = {\n    touch: isTouchDevice(),\n    env: getEnv(),\n    referer: getReferer(),\n    version: global.LMV_VIEWER_VERSION,\n    build_type: global.LMV_BUILD_TYPE };\n\n\n  //Kick off with a viewer start event\n  var startEvent = {\n    category: \"viewer_start\",\n    touch: this.environmentInfo.touch,\n    env: this.environmentInfo.env,\n    referer: this.environmentInfo.referer,\n    version: this.environmentInfo.version,\n    build_type: this.environmentInfo.build_type };\n\n  this.track(startEvent);\n\n  var _this = this;\n  this.interval = setInterval(function () {\n    _this.reportRuntimeStats();\n  }, 60000);\n};\n\n/**\n    * Stop the runtime stats reporting every min.\n    */\nLogger.prototype.shutdown = function () {\n  clearInterval(this.interval);\n  this.interval = undefined;\n};\n\n\n/**\n    * Track the user inputted entry by appending additional info \"timestamp\", \"sessionId\"\n    * @param {object} [entry] - User object to define the track object, \n           e.g. {\n               category : \"load_document\",\n               urn: \"xyz\"\n           }   \n    */\nLogger.prototype.track = function (entry) {\n\n  this.updateRuntimeStats(entry);\n\n  if (isOffline() || !this.sessionId) {\n    return;\n  }\n\n  if (this.callback) {\n\n    entry.timestamp = Date.now();\n    entry.sessionId = this.sessionId;\n\n    this.callback(entry);\n  }\n};\n\nLogger.prototype.updateRuntimeStats = function (entry) {\n  if (entry.hasOwnProperty('aggregate')) {\n    switch (entry.aggregate) {\n      case 'count':\n        if (this.runtimeStats[entry.name] > 0) {\n          this.runtimeStats[entry.name]++;\n        } else {\n          this.runtimeStats[entry.name] = 1;\n        }\n        this.runtimeStats._nonempty = true;\n        break;\n      case 'last':\n        this.runtimeStats[entry.name] = entry.value;\n        this.runtimeStats._nonempty = true;\n        break;\n      default:\n        this.warn('unknown log aggregate type');}\n\n  }\n};\n\nLogger.prototype.reportRuntimeStats = function () {\n  if (this.runtimeStats._nonempty) {\n    delete this.runtimeStats._nonempty;\n\n    this.runtimeStats.category = 'misc_stats';\n    this.track(this.runtimeStats);\n    this.runtimeStats = {};\n  }\n};\n\nLogger.prototype.setLevel = function (level) {\n  if (this.level === level)\n  return;\n\n  this.level = level;\n\n  // Bind to console\n  this.debug = level >= LogLevels.DEBUG ? console.log : consoleNothing;\n  this.log = level >= LogLevels.LOG ? console.log : consoleNothing;\n  this.info = level >= LogLevels.INFO ? console.info : consoleNothing;\n  this.warn = level >= LogLevels.WARNING ? console.warn : consoleNothing;\n  this.error = level >= LogLevels.ERROR ? this._reportError : consoleNothing;\n};\n\n\n/**\n    * Reports an error to the browser console and to the logger's callback.\n    * Invoked by developers when method `logger.error()` is used. \n    * Forwards the arguments directly into `console.error()`. \n    * @private\n    */\nLogger.prototype._reportError = function () {\n  if (this.callback) {\n    var msg = Array.prototype.slice.call(arguments).join(' ');\n    this.callback({ category: 'error', message: msg });\n  }\n  console.error.apply(console, arguments);\n};\n\n/**\n    * @private\n    */\nfunction getReferer() {\n  // Wrapping href retrieval due to Fortify complains\n  if (typeof window !== 'undefined') {\n    return encodeURI(_window.location.href);\n  }\n  return '';\n}\n\n\n\n/**\n   * Swallows log/debug/info/warn/error calls when the logLevel disallows it.\n   * @private\n   */\nfunction consoleNothing() {\n\n}\n\n\nexport var logger = new Logger();\n\nexport function setLogger(l) {\n  logger = l;\n}","import { i18n } from \"../globalization/i18next\";\n\n// Display units for the user to choose from\nvar DisplayUnits = [\n{ name: 'File units', type: '' },\n{ name: 'Millimeters', type: 'mm', matches: ['millimeter', 'millimeters'] },\n{ name: 'Centimeters', type: 'cm', matches: ['centimeter', 'centimeters'] },\n{ name: 'Meters', type: 'm' },\n{ name: 'Inches', type: 'in', matches: ['inch', 'inches'] },\n{ name: 'Feet', type: 'ft', matches: ['foot'] },\n{ name: 'Feet and fractional inches', type: 'ft-and-fractional-in' },\n{ name: 'Feet and decimal inches', type: 'ft-and-decimal-in' },\n{ name: 'Decimal inches', type: 'decimal-in' },\n{ name: 'Decimal feet', type: 'decimal-ft' },\n{ name: 'Fractional inches', type: 'fractional-in' },\n{ name: 'Meters and centimeters', type: 'm-and-cm' },\n{ name: 'Points', type: 'pt', matches: ['point', 'points'] }];\n\n\nvar Precision = [\n{ name: 'File precision', value: '' },\n{ name: '0 (1)', value: 0 },\n{ name: '0.1 (1/2)', value: 1 },\n{ name: '0.01 (1/4)', value: 2 },\n{ name: '0.001 (1/8)', value: 3 },\n{ name: '0.0001 (1/16)', value: 4 },\n{ name: '0.00001 (1/32)', value: 5 },\n{ name: '0.000001 (1/64)', value: 6 }];\n\n\nexport var displayUnits = DisplayUnits.map(function (x) {return x.name;});\nexport var displayUnitsEnum = DisplayUnits.map(function (x) {return x.type;});\n\nexport var displayUnitsPrecision = Precision.map(function (x) {return x.name;});\nexport var displayUnitsPrecisionEnum = Precision.map(function (x) {return x.value;});\n\n\n// Include translated names in the match\n// This is to support variations such as mm, millimeters or millimeter, or their translated counterparts\nDisplayUnits.forEach(function (unitDef) {\n  if (unitDef.matches) {\n    var traslated = unitDef.matches.map(function (x) {return i18n.translate(x);});\n    unitDef.matches = unitDef.matches.concat(traslated);\n  }\n});\n\nvar displayUnitsSet = new Set(displayUnitsEnum);\n\nexport function getUnitEnum(unit) {\n  unit = unit && unit.toLocaleLowerCase();\n  if (displayUnitsSet.has(unit)) {\n    return unit;\n  }\n\n  // find a good enum match for the unit\n  for (var i in DisplayUnits) {\n    var unitDef = DisplayUnits[i];\n    var matches = unitDef.matches;\n    if (matches && matches.indexOf(unit) > -1) {\n      return unitDef.type;\n    }\n  }\n\n  return null;\n}","\nimport * as THREE from \"three\";\nimport { SnapType } from \"./SnapTypes\";\nimport { MeasurementTypes } from \"./MeasurementTypes\";\nimport { convertUnits, formatValueWithUnits } from \"./UnitFormatter\";\n\n\nexport var EPSILON = 0.0001;\n\nexport function getSnapResultPosition(pick, viewer) {\n  if (!pick) {\n    return null;\n  }\n\n  if (pick.isPerpendicular) {\n    return pick.intersectPoint;\n  }\n\n  switch (pick.geomType) {\n    case SnapType.SNAP_VERTEX:\n    case SnapType.RASTER_PIXEL:\n    case SnapType.SNAP_MIDPOINT:\n    case SnapType.SNAP_CIRCLE_CENTER:\n      return pick.getGeometry();\n\n    case SnapType.SNAP_EDGE:\n      var eps = getEndPointsInEdge(pick.getGeometry());\n      var p1 = eps[0].clone();\n      var p2 = eps[1].clone();\n      return nearestPointInPointToLine(pick.intersectPoint, p1, p2);\n\n    case SnapType.SNAP_FACE:\n      return nearestPointInPointToPlane(pick.intersectPoint, pick.getGeometry().vertices[0], pick.faceNormal);\n\n    case SnapType.SNAP_CIRCULARARC:\n      if (viewer && viewer.model && viewer.model.is2d()) {\n        var point = pick.snapPoint;\n        pick.geomType = SnapType.SNAP_VERTEX;\n        pick.geomVertex = point;\n        return point;\n\n      } else {\n        // For 3D models, currently we don't have the center geometry of the circle. \n        // So the only way to select the center is by selecting the perimeter.\n        return pick.circularArcCenter;\n      }\n\n    case SnapType.SNAP_CURVEDEDGE:\n      return nearestVertexInVertexToEdge(pick.intersectPoint, pick.getGeometry());\n\n    case SnapType.SNAP_CURVEDFACE:\n      return pick.intersectPoint;\n\n    // For snapping intersections, the snapped position is already computed.\n    case SnapType.SNAP_INTERSECTION:\n      return pick.snapPoint;\n\n    default:\n      return null;}\n\n};\n\nexport function correctPerpendicularPicks(firstPick, secondPick, viewer, snapper) {\n\n  if (!firstPick || !secondPick || !firstPick.getGeometry() || !secondPick.getGeometry()) {\n    return false;\n  }\n\n  var start = getSnapResultPosition(firstPick, viewer);\n\n  if (snapper && viewer) {\n\n    // Simple _ to Edge - Snap the second pick when it's 90 degrees.\n    if (secondPick.geomType === SnapType.SNAP_EDGE) {\n      var v2 = new THREE.Vector3();\n      var v3 = new THREE.Vector3();\n\n      var secondEdge = secondPick.getGeometry();\n\n      v2.subVectors(secondPick.intersectPoint, start).normalize(); // rubberband vector\n      v3.subVectors(secondEdge.vertices[0], secondEdge.vertices[1]).normalize();\n\n      if (isPerpendicular(v2, v3, 0.05)) {\n\n        var newPoint = nearestPointInPointToSegment(start, secondEdge.vertices[0], secondEdge.vertices[1], true);\n\n        if (newPoint) {\n          if (snapper.onMouseMove(project(newPoint, viewer))) {\n            snapper.setPerpendicular(true);\n          }\n\n          secondPick.geomVertex = newPoint;\n          secondPick.intersectPoint = newPoint;\n          return true;\n        }\n      }\n    }\n\n    // Simple _ to Face - Snap the second pick when it's 90 degrees.\n    else if (secondPick.geomType === SnapType.SNAP_FACE) {\n\n        var v = new THREE.Vector3();\n\n        var secondFace = secondPick.getGeometry();\n\n        v.subVectors(secondPick.intersectPoint, start).normalize(); // rubberband vector\n\n        if (isParallel(secondPick.faceNormal, v, 0.05)) {\n\n          var newPoint = nearestPointInPointToPlane(start, secondFace.vertices[0], secondPick.faceNormal);\n          if (snapper.onMouseMove(project(newPoint, viewer))) {\n            snapper.setPerpendicular(true);\n          }\n\n          secondPick.geomVertex = newPoint;\n          secondPick.intersectPoint = newPoint;\n          return true;\n        }\n      }\n  }\n};\n\nexport function calculateDistance(firstPick, secondPick, dPrecision, viewer) {\n\n  if (!firstPick || !secondPick || !firstPick.getGeometry() || !secondPick.getGeometry()) {\n    return null;\n  }\n\n  var ep1 = getSnapResultPosition(firstPick, viewer);\n  var ep2 = getSnapResultPosition(secondPick, viewer);\n\n  if (!ep1 || !ep2) {\n    return null;\n  }\n\n  if (isEqualVectors(ep1, ep2, EPSILON)) {\n    return null;\n  }\n\n  var distanceXYZ, distanceX, distanceY, distanceZ;\n\n  // Convert coords when in 2D\n  if (viewer.model.is2d()) {\n    ep1 = ep1.clone();\n    ep2 = ep2.clone();\n    viewer.model.pageToModel(ep1, ep2, firstPick.viewportIndex2d);\n  }\n\n  // Include resolution limits for high precision 2D-measurements, where available \n  if (dPrecision) {\n\n    dPrecision = processDPrecision(dPrecision);\n\n    // Adjust the distances aligned by the precision\n    var measurementDistance = ep1.distanceTo(ep2);\n    distanceXYZ = applyDPrecision(measurementDistance, dPrecision);\n\n    measurementDistance = Math.abs(ep1.x - ep2.x);\n    distanceX = applyDPrecision(measurementDistance, dPrecision);\n\n    measurementDistance = Math.abs(ep1.y - ep2.y);\n    distanceY = applyDPrecision(measurementDistance, dPrecision);\n\n    return {\n      distanceXYZ: distanceXYZ,\n      distanceX: distanceX,\n      distanceY: distanceY,\n      distanceZ: 0,\n      type: MeasurementTypes.MEASUREMENT_DISTANCE };\n\n  }\n\n  // Calculation for 3D models and 2D models without resolution limits\n  distanceXYZ = ep1.distanceTo(ep2);\n  distanceX = Math.abs(ep1.x - ep2.x);\n  distanceY = Math.abs(ep1.y - ep2.y);\n  distanceZ = Math.abs(ep1.z - ep2.z);\n  return {\n    distanceXYZ: distanceXYZ,\n    distanceX: distanceX,\n    distanceY: distanceY,\n    distanceZ: distanceZ,\n    type: MeasurementTypes.MEASUREMENT_DISTANCE };\n\n};\n\nfunction getDpiPrecision(model, viewportIndex) {\n\n  // Only do this for 2D models.\n  if (model.is3d()) {\n    return 0;\n  }\n\n  // TODO: The measurement values were returning incorrect results because the logical_width and logical_height is being exported for PDFs.\n  // This issue was introduced with the PDF viewport changes: PR-3523\n  if (model.isPdf(true)) {\n    return 0;\n  }\n\n  // Include resolution limits for high precision 2D-measurements, where available (TREX-575)\n  var page_width = model.getMetadata('page_dimensions', 'page_width', null);\n  var logical_width = model.getMetadata('page_dimensions', 'logical_width', null);\n  var page_height = model.getMetadata('page_dimensions', 'page_height', null);\n  var logical_height = model.getMetadata('page_dimensions', 'logical_height', null);\n  if (!page_width || !logical_width || !page_height || !logical_height) {\n    return 0;\n  }\n\n  // Retrieve the inverse DPI\n  var invdpix = page_width / logical_width;\n  var invdpiy = page_height / logical_height;\n\n  // Calculate the graininess in model units\n  var p1 = new THREE.Vector3(0.0, 0.0, 0.0);\n  var p2 = new THREE.Vector3(invdpix, invdpiy, 0.0);\n  model.pageToModel(p1, p2, viewportIndex);\n  var dPrecision = p1.distanceTo(p2);\n\n  return dPrecision;\n};\n\nfunction isContainsEqualVectors(points) {\n  for (var i = 0; i < points.length; i++) {\n    for (var j = 0; j < points.length; j++) {\n      if (i !== j && isEqualVectors(points[i], points[j], EPSILON)) {\n        return true;\n      }\n    }\n  }\n\n  return false;\n};\n\nfunction calculateAngle(picks, viewer) {\n  var points = [];\n\n  for (var key in picks) {\n    if (picks.hasOwnProperty(key)) {\n      var point = getSnapResultPosition(picks[key], viewer);\n      if (point) {\n        points.push(point);\n      }\n    }\n  }\n\n  if (points.length !== 3 || isContainsEqualVectors(points)) {\n    return null;\n  }\n\n\n  var v1 = new THREE.Vector3();\n  var v2 = new THREE.Vector3();\n\n  v1.subVectors(points[0], points[1]);\n  v2.subVectors(points[2], points[1]);\n\n  return angleVectorToVector(v1, v2);\n};\n\nfunction calculateArea(picks, viewer) {\n  var points = [];\n\n  for (var key in picks) {\n    if (picks.hasOwnProperty(key)) {\n      var point = getSnapResultPosition(picks[key], viewer);\n      if (point) {\n        points.push(point.clone());\n      }\n    }\n  }\n\n  var firstPoint = getSnapResultPosition(picks[1], viewer);\n  if (firstPoint) {\n    points.push(firstPoint.clone());\n  }\n\n  for (var i = 0; i < points.length; i += 2) {\n    viewer.model.pageToModel(points[i], points[i + 1], picks[1].viewportIndex2d);\n  }\n\n  var sum1 = 0;\n  var sum2 = 0;\n\n  for (var i = 0; i < points.length - 1; i++) {\n    sum1 += points[i].x * points[i + 1].y;\n    sum2 += points[i].y * points[i + 1].x;\n  }\n\n  var area = Math.abs((sum1 - sum2) / 2);\n  return area;\n\n};\nfunction calculateArcLength(firstPick, secondPick, dPrecision, viewer) {\n\n  if (!firstPick || !secondPick || !firstPick.getGeometry() || !secondPick.getGeometry()) {\n    return null;\n  }\n\n  if (!firstPick.circularArcRadius) {\n    return null;\n  }\n\n  var p1 = getSnapResultPosition(firstPick, viewer).clone();\n  var p2 = getSnapResultPosition(secondPick, viewer).clone();\n\n  var arcCenter = firstPick.circularArcCenter;\n\n  // Get the center point\n  var centerPoint =\n  arcCenter instanceof THREE.Vector3 ?\n  arcCenter.clone() :\n  new THREE.Vector3(arcCenter.x, arcCenter.y, arcCenter.z);\n\n\n  if (!p1 || !p2) {\n    return null;\n  }\n\n  if (isEqualVectors(p1, p2, EPSILON)) {\n    return 0;\n  }\n\n  // Convert coords when in 2D\n  if (viewer.model.is2d()) {\n    viewer.model.pageToModel(p1, p2, firstPick.viewportIndex2d);\n    viewer.model.pageToModel(centerPoint, null, firstPick.viewportIndex2d);\n  }\n\n  // calculate the arc length\n  function getArcLength() {\n    var v1 = new THREE.Vector3();\n    var v2 = new THREE.Vector3();\n    v1.subVectors(p1, centerPoint);\n    v2.subVectors(p2, centerPoint);\n\n    // To average decimal values from both the points \n    var lengthProduct = v1.length() * v2.length();\n\n    var dot = v1.dot(v2);\n    var arcAngle = Math.acos(dot / lengthProduct);\n\n    var radius = v1.length();\n\n    return arcAngle * radius;\n  }\n\n  var arcLength = getArcLength();\n\n  // Include resolution limits for high precision 2D-measurements, where available \n  if (dPrecision) {\n    dPrecision = processDPrecision(dPrecision);\n    return applyDPrecision(arcLength, dPrecision);\n  } else {\n    return arcLength;\n  }\n};\n\n// Process the DPI precision\nfunction processDPrecision(dPrecision) {\n  var n = Math.log(2.0 * dPrecision) / Math.log(10.0);\n  var nd = Math.floor(n);\n\n  // Increase one decimal to ensure being covered\n  if (1.0 < 2.0 * dPrecision / Math.pow(10.0, nd))\n  nd++;\n\n  return Math.pow(10.0, nd);\n};\n\n// Apply DPI precision to a measurement to round it to the correct number of digits\nfunction applyDPrecision(measurement, dPrecision) {\n  return Math.floor(measurement / dPrecision + 0.5) * dPrecision;\n};\n\n/**\n    * The main function for this file, which calculates a measurement result (either distance\n    * or angle) from a given measurement.\n    */\nexport function computeResult(picks, measurementType, viewer, options) {\n\n  switch (measurementType) {\n    case MeasurementTypes.MEASUREMENT_DISTANCE:\n      var firstPick = picks[1];\n      var secondPick = picks[2];\n      var dPrecision = getDpiPrecision(viewer.model, firstPick.viewportIndex2d);\n\n      return calculateDistance(firstPick, secondPick, dPrecision, viewer);\n\n    case MeasurementTypes.MEASUREMENT_ANGLE:\n      var angle = calculateAngle(picks, viewer);\n      return angle ? {\n        angle: !options || !options.angleOuter ? angle : 360 - angle,\n        type: measurementType } :\n      null;\n\n    case MeasurementTypes.MEASUREMENT_AREA:\n      return {\n        area: calculateArea(picks, viewer),\n        type: measurementType };\n\n\n    case MeasurementTypes.MEASUREMENT_ARC:\n      var firstPick = picks[1];\n      var secondPick = picks[2];\n      var dPrecision = getDpiPrecision(viewer.model, firstPick.viewportIndex2d);\n      return {\n        arc: calculateArcLength(firstPick, secondPick, dPrecision, viewer),\n        type: measurementType };\n\n\n    case MeasurementTypes.MEASUREMENT_LOCATION:\n      return {\n        location: getSnapResultPosition(picks[1], viewer),\n        type: measurementType };\n\n\n    default:\n      return null;}\n\n\n};\n\nexport function getFaceArea(viewer, measurement, face, units, precision, calibrationFactor) {\n\n  var area = 0;\n  var vertices = face.vertices;\n  var V1 = new THREE.Vector3();\n  var V2 = new THREE.Vector3();\n\n  for (var i = 0; i < vertices.length; i += 3) {\n\n    V1.subVectors(vertices[i + 1], vertices[i]);\n    V2.subVectors(vertices[i + 2], vertices[i]);\n\n    area += V1.length() * V2.length() * Math.sin(V1.angleTo(V2)) / 2;\n  }\n\n  area = convertUnits(viewer.model.getUnitString(), units, calibrationFactor, area, 'square');\n\n  if (units) {\n\n    return formatValueWithUnits(area, units + '^2', 3, precision);\n  } else\n  {\n\n    return formatValueWithUnits(area, null, 3, precision);\n  }\n\n};\n\nexport function getCircularArcRadius(viewer, measurement, edge, units, precision, calibrationFactor) {\n\n  var radius = edge.radius;\n\n  if (radius) {\n    if (viewer.model.is2d()) {\n      var pt1 = edge.center.clone();\n      var pt2 = edge.vertices[0].clone();\n      viewer.model.pageToModel(pt1, pt2, measurement.getPick(1).viewportIndex2d);\n      radius = pt1.distanceTo(pt2);\n    }\n\n    radius = convertUnits(viewer.model.getUnitString(), units, calibrationFactor, radius);\n    return formatValueWithUnits(radius, units, 3, precision);\n  }\n};\n\nexport function project(point, viewer, offset) {\n  var camera = viewer.navigation.getCamera(),\n  containerBounds = viewer.navigation.getScreenViewport(),\n  p = new THREE.Vector3(point.x, point.y, point.z);\n\n  p = p.project(camera);\n\n  offset = offset || 0;\n\n  return new THREE.Vector2(Math.round((p.x + 1) / 2 * containerBounds.width) + offset,\n  Math.round((-p.y + 1) / 2 * containerBounds.height) + offset);\n};\n\nexport function inverseProject(point, viewer) {\n\n  var camera = viewer.navigation.getCamera(),\n  containerBounds = viewer.navigation.getScreenViewport(),\n  p = new THREE.Vector3();\n\n  p.x = point.x / containerBounds.width * 2 - 1;\n  p.y = -(point.y / containerBounds.height * 2 - 1);\n  p.z = 0;\n\n  p = p.unproject(camera);\n\n  return p;\n};\n\n//***** Helper functions for calculations without state: ***** //\n//TODO_TS: Are these used outside the Markup extension? If not, they should move there.\n\n\n// Get the nearest point on the line from point to line\n// inLine - whether to force the result to be inside the given line or not.\nexport function nearestPointInPointToLine(point, lineStart, lineEnd) {\n\n  var X0 = new THREE.Vector3();\n  var X1 = new THREE.Vector3();\n  var nearestPoint;\n  var param;\n\n  X0.subVectors(lineStart, point);\n  X1.subVectors(lineEnd, lineStart);\n  param = X0.dot(X1);\n  X0.subVectors(lineEnd, lineStart);\n  param = -param / X0.dot(X0);\n\n  X0.subVectors(lineEnd, lineStart);\n  X0.multiplyScalar(param);\n  nearestPoint = X0.add(lineStart);\n\n  return nearestPoint;\n};\n\n// Get the nearest point on the line segment from point to line segment\nexport function nearestPointInPointToSegment(point, lineStart, lineEnd, forcePerpendicular) {\n\n  var X0 = new THREE.Vector3();\n  var X1 = new THREE.Vector3();\n  var nearestPoint;\n  var param;\n\n  X0.subVectors(lineStart, point);\n  X1.subVectors(lineEnd, lineStart);\n  param = X0.dot(X1);\n  X0.subVectors(lineEnd, lineStart);\n  param = -param / X0.dot(X0);\n\n  if (param < 0) {\n    if (forcePerpendicular) {\n      nearestPoint = null;\n    } else {\n      nearestPoint = lineStart;\n    }\n  } else\n  if (param > 1) {\n    if (forcePerpendicular) {\n      nearestPoint = null;\n    } else {\n      nearestPoint = lineEnd;\n    }\n  } else\n  {\n    X0.subVectors(lineEnd, lineStart);\n    X0.multiplyScalar(param);\n    nearestPoint = X0.add(lineStart);\n  }\n\n  return nearestPoint;\n};\n\n\n\nexport function isEqualVectors(v1, v2, precision) {\n  if (!v1 || !v2) {\n    return false;\n  }\n\n  if (Math.abs(v1.x - v2.x) <= precision && Math.abs(v1.y - v2.y) <= precision && Math.abs(v1.z - v2.z) <= precision) {\n    return true;\n  }\n  return false;\n};\n\nexport function getEndPointsInEdge(edge) {\n\n  var vertices = edge.vertices;\n  var endPoints = [];\n\n  for (var i = 0; i < vertices.length; ++i) {\n\n    var duplicate = false;\n\n    for (var j = 0; j < vertices.length; ++j) {\n\n      if (j !== i && vertices[j].equals(vertices[i])) {\n\n        duplicate = true;\n        break;\n      }\n    }\n\n    if (!duplicate) {\n\n      endPoints.push(vertices[i]);\n\n    }\n  }\n\n  return endPoints;\n};\n\nexport function angleVectorToVector(v1, v2) {\n  return v1.angleTo(v2) * 180 / Math.PI;\n};\n\n\n// Find the nearest point from point to plane\nfunction nearestPointInPointToPlane(p1, p2, n) {\n\n  var nearestPoint = new THREE.Vector3();\n  var norm = n.clone();\n  var X0 = new THREE.Vector3();\n  X0.subVectors(p1, p2);\n\n  var sn = -norm.dot(X0);\n  var sd = norm.dot(norm);\n  var sb = sn / sd;\n\n  nearestPoint.addVectors(p1, norm.multiplyScalar(sb));\n  return nearestPoint;\n};\n\n\n\n// Returns true if v1 an v2 are parallel\nexport function isParallel(v1, v2, precision) {\n  precision = precision ? precision : EPSILON;\n  return 1 - Math.abs(v1.dot(v2)) < precision;\n};\n\nexport function isPerpendicular(v1, v2, precision) {\n  precision = precision ? precision : EPSILON;\n  return Math.abs(v1.dot(v2)) < precision;\n};\n\n\n// Find the vertex need to draw For circular arc's radius\nexport function nearestVertexInVertexToEdge(vertex, edge) {\n\n  var nearestPoint;\n  var minDist = Number.MAX_VALUE;\n\n  for (var i = 0; i < edge.vertices.length; i++) {\n    var dist = vertex.distanceTo(edge.vertices[i]);\n    if (minDist > dist) {\n      nearestPoint = edge.vertices[i];\n      minDist = dist;\n    }\n  }\n\n  return nearestPoint;\n};\n\nexport function createCommonOverlay(viewer, name) {\n  if (!viewer.impl.overlayScenes[name])\n  viewer.impl.createOverlayScene(name);\n}\n\nexport function safeToggle(element, property, show) {\n  // toggle only if it needs to. Necessary for IE11.\n\n  if (element.classList.contains(property) && !show || !element.classList.contains(property) && show) {\n    element.classList.toggle(property, show);\n  }\n}","\nexport var MeasureEvents = {\n  MEASUREMENT_CHANGED_EVENT: 'measurement-changed',\n  /**\n                                                     * Fired when all picks from a measurement have been set.\n                                                     *\n                                                     * @event Autodesk.MeasureEvents#MEASUREMENT_COMPLETED_EVENT\n                                                     * @property {object} data - Event object\n                                                     * @property {number} data.type - Measurement type\n                                                     * @property {number} data.id - Measurement id\n                                                     */\n  MEASUREMENT_COMPLETED_EVENT: 'measurement-completed',\n  UNITS_CALIBRATION_STARTS_EVENT: 'units_calibration_starts_event',\n  FINISHED_CALIBRATION_FOR_DIMENSION_EVENT: 'finished_calibration_for_dimension_event',\n  CALIBRATION_REQUIRED_EVENT: 'calibration-required',\n  OPEN_CALIBRATION_PANEL_EVENT: 'open-calibration-panel',\n  CLOSE_CALIBRATION_PANEL_EVENT: 'close-calibration-panel',\n  CLEAR_CALIBRATION_SIZE_EVENT: 'clear-calibration-size',\n  FINISHED_CALIBRATION: 'finished-calibration',\n  DISPLAY_UNITS_CHANGED: 'display-units-changed',\n  MEASUREMENT_MODE_ENTER: 'measure-mode-enter',\n  MEASUREMENT_MODE_LEAVE: 'measure-mode-leave',\n  DELETE_MEASUREMENT: 'delete-measurement' };","\nimport { SnapResult } from \"./SnapResult\";\nimport { MeasurementTypes } from \"./MeasurementTypes\";\nimport { getSnapResultPosition, isEqualVectors, EPSILON, computeResult } from \"./MeasureCommon\";\n\n/**\n                                                                                                  * This is a DATA container class.\n                                                                                                  * No rendering should be attached to it.\n                                                                                                  * @private\n                                                                                                  */\nexport function Measurement(measurementType, id, options) {\n\n  this.measurementType = measurementType;\n  this.id = id;\n  this.picks = [];\n  this.closedArea = false;\n  this.isRestored = false;\n  this.options = options;\n\n  this.resetMeasureValues();\n}\n\n/**\n   * Returns a clone of itself.\n   */\nMeasurement.prototype.clone = function () {var _this$location;\n  var measurement = new Measurement(this.measurementType, this.id, this.options);\n  measurement.closedArea = this.closedArea;\n  measurement.isRestored = this.isRestored;\n  measurement.picks = this.clonePicks();\n  measurement.angle = this.angle;\n  measurement.distanceX = this.distanceX;\n  measurement.distanceY = this.distanceY;\n  measurement.distanceZ = this.distanceZ;\n  measurement.distanceXYZ = this.distanceXYZ;\n  measurement.arc = this.arc;\n  measurement.location = (_this$location = this.location) === null || _this$location === void 0 ? void 0 : _this$location.clone();\n  measurement.result = Object.assign({}, this.result);\n  return measurement;\n};\n\nMeasurement.prototype.resetMeasureValues = function () {\n\n  this.angle = 0;\n  this.distanceX = 0;\n  this.distanceY = 0;\n  this.distanceZ = 0;\n  this.distanceXYZ = 0;\n  this.arc = 0;\n  this.location = null;\n  this.result = null;\n};\n\nMeasurement.prototype.setPick = function (index, value) {\n\n  var pick = this.picks[index] = value;\n  pick.id = parseInt(index);\n  return pick;\n};\n\nMeasurement.prototype.getPick = function (index) {\n\n  var pick = this.picks[index];\n\n  if (!pick) {\n    pick = this.setPick(index, new SnapResult());\n  }\n\n  return pick;\n};\n\n\nMeasurement.prototype.clonePicks = function (index) {\n\n  var picks = [];\n  for (var key in this.picks) {\n    if (this.picks.hasOwnProperty(key)) {\n      var pick = this.picks[key];\n      picks.push(pick.clone());\n    }\n  }\n  return picks;\n};\n\n\nMeasurement.prototype.countPicks = function () {\n\n  return Object.keys(this.picks).length;\n};\n\nMeasurement.prototype.getMaxNumberOfPicks = function () {\n\n  switch (this.measurementType) {\n    case MeasurementTypes.MEASUREMENT_DISTANCE:\n    case MeasurementTypes.MEASUREMENT_LOCATION:\n    case MeasurementTypes.MEASUREMENT_CALLOUT:\n    case MeasurementTypes.MEASUREMENT_ARC:\n      return 2;\n\n    case MeasurementTypes.MEASUREMENT_ANGLE:\n      return 3;\n\n    case MeasurementTypes.MEASUREMENT_AREA:\n      return this.closedArea ? this.countPicks() : Number.MAX_VALUE - 1;}\n\n};\n\nMeasurement.prototype.hasPick = function (pickNumber) {\n\n  return this.picks[pickNumber] && !this.picks[pickNumber].isEmpty() || this.isRestored;\n};\n\nMeasurement.prototype.isComplete = function () {\n  var complete = this.countPicks() === this.getMaxNumberOfPicks();\n\n  for (var key in this.picks) {\n    if (this.picks.hasOwnProperty(key)) {\n      complete = complete && this.hasPick(key);\n\n      if (!complete)\n      break;\n    }\n  }\n\n  return complete;\n};\n\nMeasurement.prototype.isEmpty = function () {\n  var empty = true;\n\n  for (var key in this.picks) {\n    if (this.picks.hasOwnProperty(key)) {\n      empty = empty && !this.hasPick(key);\n\n      if (!empty)\n      break;\n    }\n  }\n\n  return empty;\n};\n\nMeasurement.prototype.clearPick = function (pickNumber) {\n\n  if (this.picks[pickNumber]) {\n    this.picks[pickNumber].clear();\n  }\n\n  this.resetMeasureValues();\n};\n\nMeasurement.prototype.clearAllPicks = function () {\n\n  for (var key in this.picks) {\n    if (this.picks.hasOwnProperty(key)) {\n      this.clearPick(key);\n    }\n  }\n};\n\nMeasurement.prototype.hasEqualPicks = function (firstPick, secondPick) {\n  if (!firstPick || !secondPick)\n  return false;\n\n  if (firstPick.geomType === secondPick.geomType) {\n    var first = getSnapResultPosition(firstPick);\n    var second = getSnapResultPosition(secondPick);\n    return isEqualVectors(first, second, EPSILON);\n  }\n\n  return false;\n};\n\n/**\n    * Calculates distance/angle based on the values of the picks\n    * and stores it in .result\n    */\nMeasurement.prototype.computeResult = function (picks, viewer) {\n\n  this.resetMeasureValues();\n\n  if (!viewer.model) {\n    this.result = null;\n    return false;\n  }\n\n  // Compute and check if there's a result\n  var result = this.result = computeResult(picks, this.measurementType, viewer, this.options);\n\n  if (result === null) {\n    return !this.isComplete();\n  }\n\n  switch (result.type) {\n    case MeasurementTypes.MEASUREMENT_DISTANCE:\n      this.distanceXYZ = result.distanceXYZ;\n      this.distanceX = result.distanceX;\n      this.distanceY = result.distanceY;\n      this.distanceZ = result.distanceZ;\n      return true;\n\n    case MeasurementTypes.MEASUREMENT_ANGLE:\n      this.angle = isNaN(result.angle) ? 0 : result.angle;\n      return true;\n\n    case MeasurementTypes.MEASUREMENT_AREA:\n      this.area = result.area;\n      return true;\n\n    case MeasurementTypes.MEASUREMENT_ARC:\n      this.arc = result.arc;\n      return true;\n\n    case MeasurementTypes.MEASUREMENT_LOCATION:\n      this.location = result.location;\n      return true;\n\n    case MeasurementTypes.MEASUREMENT_CALLOUT:\n      return true;\n\n    default:\n      return false;}\n\n};\n\nMeasurement.prototype.getGeometry = function (pickNumber) {\n  return { \"type\": this.picks[pickNumber].geomType, \"geometry\": this.picks[pickNumber].getGeometry() };\n};\n\n// TODO: Move this method elsewhere. This is a data-only class.\nMeasurement.prototype.attachIndicator = function (viewer, tool, indicatorClass) {\n  this.indicator = new indicatorClass(viewer, this, tool);\n  this.indicator.init();\n};","\n//TODO_TS: Rename this to singular\nexport var MeasurementTypes = {\n  MEASUREMENT_DISTANCE: 1, // Measurement from point to point, not matter what geometry it is.\n  MEASUREMENT_ANGLE: 2,\n  MEASUREMENT_AREA: 3,\n  CALIBRATION: 4,\n  MEASUREMENT_CALLOUT: 5,\n  MEASUREMENT_LOCATION: 6,\n  MEASUREMENT_ARC: 7 };","\nimport { SceneMath } from \"../wgs/scene/SceneMath\";\n\n/**\n                                                     * Used in order to convert from Leaflet coordinates to PDF coordinates.\n                                                     */\nfunction leafletToPdfWorld(viewer, point) {\n  var leafletNormalizingMatrix = getLeafletNormalizingMatrix(viewer);\n\n  if (!leafletNormalizingMatrix) {\n    return null;\n  }\n\n  point.applyMatrix4(leafletNormalizingMatrix);\n\n  var pdfNormalizingMatrix;\n\n  // In case the model is Leaflet, generate bbox from the metadata.\n  if (viewer.model.isLeaflet()) {\n    var dimensions = viewer.model.getMetadata('page_dimensions');\n    var bbox = new THREE.Box3(new THREE.Vector3(), new THREE.Vector3(dimensions.page_width, dimensions.page_height, 0));\n    pdfNormalizingMatrix = SceneMath.getNormalizingMatrix(undefined, bbox);\n  } else {\n    // Otherwise it's a vector-PDF - just take the bounding box from the model itself.\n    pdfNormalizingMatrix = SceneMath.getNormalizingMatrix(viewer.model);\n  }\n\n  pdfNormalizingMatrix = pdfNormalizingMatrix.getInverse(pdfNormalizingMatrix);\n  point.applyMatrix4(pdfNormalizingMatrix);\n\n  return point;\n}\n\n/**\n   * Used in order to convert from PDF coordinates to Leaflet coordinates.\n   * \n   * Assumes the current model is loaded with PDFLoader.\n   */\nfunction pdfToLeafletWorld(viewer, point) {\n  var pdfNormalizingMatrix = SceneMath.getNormalizingMatrix(viewer.model);\n  point.applyMatrix4(pdfNormalizingMatrix);\n\n  var leafletNormalizingMatrix = getLeafletNormalizingMatrix(viewer);\n\n  if (!leafletNormalizingMatrix) {\n    return null;\n  }\n\n  leafletNormalizingMatrix = leafletNormalizingMatrix.getInverse(leafletNormalizingMatrix);\n  point.applyMatrix4(leafletNormalizingMatrix);\n\n  return point;\n}\n\n/**\n   * Searches inside the bubble for the Leaflets params.\n   */\nfunction getLeafletLoadOptions(viewer) {var _documentNode$search$;\n  var documentNode = viewer.impl.model.getDocumentNode();\n\n  var leafletItem = documentNode === null || documentNode === void 0 ? void 0 : (_documentNode$search$ = documentNode.search(Autodesk.Viewing.BubbleNode.LEAFLET_NODE)[0]) === null || _documentNode$search$ === void 0 ? void 0 : _documentNode$search$._raw();\n\n  if (!leafletItem) {\n    return null;\n  }\n\n  var options = {};\n  var _document = new Autodesk.Viewing.Document(documentNode.getRootNode()._raw(), '');\n  _document.getLeafletParams(options, documentNode, leafletItem);\n\n  return options;\n}\n\n/**\n   * Calculates the Leaflet's bounding box, using parameters from the bubble.\n   * Use the same original logic from the leaflet loader.\n   */\nfunction getLeafletBoundingBox(viewer) {\n  var texQuadConfig = new Autodesk.Viewing.Private.TexQuadConfig();\n  var options = getLeafletLoadOptions(viewer);\n\n  if (!options) {\n    return null;\n  }\n\n  texQuadConfig.initFromLoadOptions(null, options);\n  var boundingBox = texQuadConfig.getBBox();\n\n  return boundingBox;\n}\n\nfunction getLeafletNormalizingMatrix(viewer) {\n  var bbox = getLeafletBoundingBox(viewer);\n\n  if (!bbox) {\n    return null;\n  }\n\n  var matrix = SceneMath.getNormalizingMatrix(null, bbox);\n\n  return matrix;\n}\n\n\nexport var PDFUtils = {\n  leafletToPdfWorld: leafletToPdfWorld,\n  pdfToLeafletWorld: pdfToLeafletWorld,\n  getLeafletLoadOptions: getLeafletLoadOptions,\n  getLeafletBoundingBox: getLeafletBoundingBox,\n  getLeafletNormalizingMatrix: getLeafletNormalizingMatrix };","\nimport { SnapType } from \"./SnapTypes\";\n\n/**\n                                         * Encapsulates the result of a Snap operation performed by the {@link Snapper}.\n                                         *\n                                         * @memberof Autodesk.Viewing.MeasureCommon\n                                         * @alias Autodesk.Viewing.MeasureCommon.SnapResult\n                                         *\n                                         * @constructor\n                                         * @class\n                                         */\nexport function SnapResult() {\n  this.clear();\n}\n\n/**\n   * Resets the object to its non-snapping state.\n   *\n   * @alias Autodesk.Viewing.MeasureCommon.SnapResult#clear\n   */\nSnapResult.prototype.clear = function () {\n\n  this.geomType = null; // int, such as { \"NONE: -1\", \"VERTEX\": 0, \"EDGE\": 1, \"FACE\": 2, ... }\n  this.modelId = null; // string, model's internal id. null when snapping to overlay geometry.\n  this.snapNode = null; // int, the dbId\n  this.geomVertex = null; // THREE.Vector3\n  this.geomEdge = null; // THREE.Geometry\n  this.geomFace = null; // THREE.Geometry\n  this.radius = null; // Number\n  this.intersectPoint = null; // THREE.Vector3\n  this.faceNormal = null; // THREE.Vector3\n  this.viewportIndex2d = null; // int\n  this.circularArcCenter = null;\n  this.circularArcRadius = null;\n  this.fromTopology = false;\n  this.isPerpendicular = false;\n  this.snapPoint = null;\n};\n\n/**\n    * Copies the current state of the object into another.\n    *\n    * @param {SnapResult} destiny - target for the copy operation.\n    *\n    * @alias Autodesk.Viewing.MeasureCommon.SnapResult#copyTo\n    */\nSnapResult.prototype.copyTo = function (destiny) {\n  // Shallow copies of THREE objects should be fine.\n  destiny.modelId = this.modelId;\n  destiny.snapNode = this.snapNode;\n  destiny.geomVertex = this.geomVertex;\n  destiny.geomFace = this.geomFace;\n  destiny.geomEdge = this.geomEdge;\n  destiny.radius = this.radius;\n  destiny.geomType = this.geomType;\n  destiny.intersectPoint = this.intersectPoint;\n  destiny.faceNormal = this.faceNormal;\n  destiny.viewportIndex2d = this.viewportIndex2d;\n  destiny.circularArcCenter = this.circularArcCenter;\n  destiny.circularArcRadius = this.circularArcRadius;\n  destiny.fromTopology = this.fromTopology;\n  destiny.isPerpendicular = this.isPerpendicular;\n  destiny.snapPoint = this.snapPoint;\n};\n\n/**\n    * Creates a new instance and copies the current state into it.\n    *\n    * @returns {SnapResult}\n    *\n    * @alias Autodesk.Viewing.MeasureCommon.SnapResult#clone\n    */\nSnapResult.prototype.clone = function () {\n  var theClone = new SnapResult();\n  this.copyTo(theClone);\n  return theClone;\n};\n\n/**\n    * @returns {Boolean} true only when snapping information is available.\n    *\n    * @alias Autodesk.Viewing.MeasureCommon.SnapResult#isEmpty\n    */\nSnapResult.prototype.isEmpty = function () {\n  return !this.getGeometry();\n};\n\nvar tmpMatrix = null;\nvar tmpVec1 = null;\nvar tmpVec2 = null;\n\n// Note that we assume here that matrix preserves spheres. Otherwise, transforming lengths is not possible\nvar transformRadius = function transformRadius(radius, matrix) {\n  tmpVec1 = tmpVec1 || new THREE.Vector3();\n  tmpVec2 = tmpVec2 || new THREE.Vector3();\n\n  tmpVec1.set(0, 0, 0);\n  tmpVec2.set(radius, 0, 0);\n\n  // transform both vectors\n  tmpVec1.applyMatrix4(matrix);\n  tmpVec2.applyMatrix4(matrix);\n\n  return tmpVec1.distanceTo(tmpVec2);\n};\n\n// Transform SnapResult to another coordinate system. \n//\n// Note that we assume matrix to preserve spheres, which works for a composition of translation, uniform scaling, and rotation.\nSnapResult.prototype.applyMatrix4 = function (matrix) {\n\n  // transform THREE.Geometry\n  this.geomEdge && this.geomEdge.applyMatrix(matrix);\n  this.geomFace && this.geomFace.applyMatrix(matrix);\n\n  // transform points (Vector3)\n  this.geomVertex && this.geomVertex.applyMatrix4(matrix);\n  this.intersectPoint && this.intersectPoint.applyMatrix4(matrix);\n  this.circularArcCenter && this.circularArcCenter.applyMatrix4(matrix);\n  this.snapPoint && this.snapPoint.applyMatrix4(matrix);\n\n  // transform normal\n  if (this.faceNormal) {\n    tmpMatrix = tmpMatrix || new THREE.Matrix4();\n    var normalMatrix = tempMatrix().getNormalMatrix(matrix);\n    this.faceNormal.applyMatrix4(normalMatrix);\n  }\n\n  // Transform radii\n  this.radius = transformRadius(this.radius, matrix);\n  this.circularArcRadius = transformRadius(this.circularArcRadius, matrix);\n};\n\n/**\n    * Gets the snapped face, when available.\n    *\n    * @alias Autodesk.Viewing.MeasureCommon.SnapResult#getFace\n    */\nSnapResult.prototype.getFace = function () {\n  return this.geomFace;\n};\n\n/**\n    * Gets the snapped edge, when available.\n    *\n    * @alias Autodesk.Viewing.MeasureCommon.SnapResult#getEdge\n    */\nSnapResult.prototype.getEdge = function () {\n  return this.geomEdge;\n};\n\n/**\n    * Gets the snapped vertex, when available.\n    *\n    * @alias Autodesk.Viewing.MeasureCommon.SnapResult#getVertex\n    */\nSnapResult.prototype.getVertex = function () {\n  return this.geomVertex;\n};\n\n/**\n    * Gets the snapped element, which differs depending on what kind of\n    * element it was snapped to, see {@link SnapType}.\n    *\n    * @alias Autodesk.Viewing.MeasureCommon.SnapResult#getGeometry\n    */\nSnapResult.prototype.getGeometry = function () {\n\n  switch (this.geomType) {\n    case SnapType.SNAP_VERTEX:return this.geomVertex;\n    case SnapType.SNAP_MIDPOINT:return this.geomVertex;\n    case SnapType.SNAP_INTERSECTION:return this.geomVertex;\n    case SnapType.SNAP_CIRCLE_CENTER:return this.geomVertex;\n    case SnapType.RASTER_PIXEL:return this.geomVertex;\n    case SnapType.SNAP_EDGE:return this.geomEdge;\n    case SnapType.SNAP_FACE:return this.geomFace;\n    case SnapType.SNAP_CIRCULARARC:return this.geomEdge;\n    case SnapType.SNAP_CURVEDEDGE:return this.geomEdge;\n    case SnapType.SNAP_CURVEDFACE:return this.geomFace;\n    default:break;}\n\n  return null;\n};\n\n/**\n    * @private\n    */\nSnapResult.prototype.setGeometry = function (type, geometry) {\n\n  switch (type) {\n    case SnapType.SNAP_VERTEX:this.geomVertex = geometry;break;\n    case SnapType.SNAP_MIDPOINT:this.geomVertex = geometry;break;\n    case SnapType.SNAP_INTERSECTION:this.geomVertex = geometry;break;\n    case SnapType.SNAP_CIRCLE_CENTER:this.geomVertex = geometry;break;\n    case SnapType.RASTER_PIXEL:this.geomVertex = geometry;break;\n    case SnapType.SNAP_EDGE:this.geomEdge = geometry;break;\n    case SnapType.SNAP_FACE:this.geomFace = geometry;break;\n    case SnapType.SNAP_CIRCULARARC:this.geomEdge = geometry;break;\n    case SnapType.SNAP_CURVEDEDGE:this.geomEdge = geometry;break;\n    case SnapType.SNAP_CURVEDFACE:this.geomFace = geometry;break;\n    default:return;}\n\n  this.geomType = type;\n};","\n/**\n * An enumeration of supported snapping types.\n *\n * @enum {number}\n * @memberof Autodesk.Viewing.MeasureCommon\n * @alias Autodesk.Viewing.MeasureCommon.SnapType\n *\n */\nexport var SnapType = {\n  SNAP_VERTEX: 0,\n  SNAP_MIDPOINT: 1,\n  SNAP_CIRCLE_CENTER: 2,\n  SNAP_EDGE: 3,\n  SNAP_FACE: 4,\n  SNAP_CIRCULARARC: 5,\n  SNAP_CURVEDEDGE: 6,\n  SNAP_CURVEDFACE: 7,\n  RASTER_PIXEL: 8,\n  SNAP_INTERSECTION: 9 };","\nimport { i18n } from \"../globalization/i18next\";\nvar FORGE_UNITS = require(\"./units-compact\");\nimport { getUnitEnum } from './DisplayUnits';\n\nfunction getExponentSymbol(exponent) {\n  var exponentSymbol = '';\n  if (exponent === 2) {\n    exponentSymbol = String.fromCharCode(0xb2);\n  } else if (exponent === 3) {\n    exponentSymbol = String.fromCharCode(0xb3);\n  }\n  return exponentSymbol;\n}\n\nfunction modf(x) {\n  var intPart = 0 <= x ? Math.floor(x) : Math.ceil(x),\n  fracPart = x - intPart;\n  return { intPart: intPart, fracPart: fracPart };\n}\n\nfunction formatNumber(x, precision, needMinusSign) {\n  var result = '';\n\n  if (needMinusSign && x === 0) {\n    result += '-';\n  }\n\n  //According to Shawn's request, do not truncate trailing .0's\n  //if (modf(x).fracPart === 0) {\n  //\n  //    // No fractional part.\n  //    //\n  //    result += x;\n  //\n  //} else if (0 < precision) {\n  if (0 < precision) {\n\n    // Truncate any trailing .0's.\n    //\n    //var s = x.toFixed(precision);\n    //var re = /^\\-?([0-9]+)\\.0+$/;\n    //var m = re.exec(s);\n    //if (m !== null) {\n    //    result += m[1];\n    //} else {\n    //    result += s;\n    //}\n\n    result += x.toFixed(precision);\n\n  } else {\n    result += x.toFixed(0);\n  }\n\n  return result;\n}\n\nfunction formatFeet(value, precision, inchesOnly, symbols) {\n\n  // Borrowed from AdCoreUnits PrimeDoublePrimeSymbol2::Format\n\n  var result = '',\n  radix = 12.0,\n  denominator = 1.0,\n  isNegative = value < 0;\n\n  for (var i = 0; i < precision; ++i) {\n    denominator *= 2.0;\n  }\n\n  // round to the nearest 1/denominator\n  if (value > 0) {\n    value += 0.5 / denominator;\n  } else {\n    value -= 0.5 / denominator;\n  }\n\n  var primeValue, doublePrimeValue;\n\n  if (!inchesOnly) {\n    primeValue = modf(value / radix).intPart;\n    result += formatNumber(primeValue, 0, isNegative) + symbols.feet + ' ';\n    doublePrimeValue = value - primeValue * radix;\n    if (doublePrimeValue < 0) {\n      doublePrimeValue = -doublePrimeValue;\n    }\n\n  } else {\n    doublePrimeValue = value;\n  }\n\n  var intPart = modf(doublePrimeValue).intPart;\n  var numerator = modf((doublePrimeValue - intPart) * denominator).intPart;\n\n  if (numerator === 0 || intPart !== 0) {\n    result += formatNumber(intPart, 0);\n  }\n\n  if (numerator !== 0) {\n    if (intPart < 0 && numerator < 0) {\n      numerator = -numerator;\n    }\n    while (numerator % 2 === 0) {\n      numerator /= 2;\n      denominator /= 2;\n    }\n    if (intPart !== 0) {\n      result += '-';\n    }\n    result += formatNumber(numerator, 0) + '/' + formatNumber(denominator, 0);\n  }\n\n  result += symbols.inches;\n  return result;\n}\n\nfunction formatMeterAndCentimeter(value, precision) {var exponent = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 1;\n  var sign = '';\n  if (value < 0) {\n    sign = '-';\n    value = Math.abs(value);\n  }\n  var modfValue = modf(value),\n  mValue = modfValue.intPart,\n  cmValue = modfValue.fracPart * Math.pow(100.0, exponent);\n\n  var exponentSymbol = getExponentSymbol(exponent);\n\n  var formattedMValue = formatNumber(mValue, 0);\n  var formattedCmValue = formatNumber(cmValue, precision);\n\n  if (formattedCmValue.startsWith(Math.pow(100.0, exponent).toString())) {\n    formattedMValue = formatNumber(mValue + 1, 0);\n    formattedCmValue = formatNumber(0, precision);\n  }\n\n  return sign + formattedMValue + \" m\".concat(exponentSymbol, \" \") + formattedCmValue + \" cm\".concat(exponentSymbol);\n}\n\nfunction formatFeetAndDecimalInches(value, precision, symbols) {var exponent = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : 1;\n  var sign = '';\n  if (value < 0) {\n    sign = '-';\n    value = Math.abs(value);\n  }\n  var modfValue = modf(value),\n  ftValue = modfValue.intPart,\n  inValue = modfValue.fracPart * Math.pow(12.0, exponent);\n\n  var exponentSymbol = getExponentSymbol(exponent);\n\n  var formattedFtValue = formatNumber(ftValue, 0);\n  var formattedInValue = formatNumber(inValue, precision);\n\n  if (formattedInValue.startsWith(Math.pow(12.0, exponent).toString())) {\n    formattedFtValue = formatNumber(ftValue + 1, 0);\n    formattedInValue = formatNumber(0, precision);\n  }\n\n  return sign +\n  formattedFtValue + symbols.feet + exponentSymbol + ' ' +\n  formattedInValue + symbols.inches + exponentSymbol;\n}\n\n\n//Hardcoded Forge units that imply specific symbol formatting\n//TODO: Not all of these are supported by the formatting code in LMV,\n//so some are commented out.\nvar customFormattingMap = {\n  feetFractionalInches: \"ft-and-fractional-in\",\n  fractionalInches: \"fractional-in\",\n  feet: \"feet\",\n  inches: \"inches\",\n  /*\n                    metersCentimeters: \"meters\",\n                    degreesMinutes: \"degrees\",\n                    slopeDegrees: \"degrees\",\n                    */\n  stationingFeet: \"feet\"\n  /*\n                         stationingMeters: \"meters\",\n                         stationingSurveyFeet: \"usSurveyFeet\"\n                          */ };\n\n\nfunction forgeUnitToSymbol(units) {\n\n  /**\n                                    * The Forge unit mapping file (units.json and units-compact.json) is generated from the Forge schema files.\n                                    * The script that does that is located here: https://git.autodesk.com/constructwin/dt-schemas\n                                    */\n\n  if (!units || !units.startsWith(\"autodesk.unit.unit:\"))\n  return units;\n\n  var schemaName = units.split(\":\")[1];\n  var unitId = schemaName.split(\"-\")[0];\n  var unitDef = FORGE_UNITS.unit[unitId];\n  if (unitDef) {\n    var customFormattingStyle = customFormattingMap[unitId];\n    if (customFormattingStyle) {\n      return customFormattingStyle;\n    }\n    //If there is no custom formatting for this unit, use its schema symbol\n    if (!unitDef.symbols) {\n      console.warn(\"Unit without symbols.\", unitDef);\n      return \"\";\n    }\n    //If there is a default symbol for this unit, use it\n    if (unitDef.defaultSymbol && unitDef.symbols[unitDef.defaultSymbol]) {\n      return unitDef.symbols[unitDef.defaultSymbol];\n    }\n    //There can be multiple symbols, we pick the first one.\n    for (var s in unitDef.symbols) {\n      return unitDef.symbols[s];\n    }\n  } else {\n    console.warn(\"Failed to find Forge unit schema for\", units);\n    return units;\n  }\n\n}\n\nfunction formatWithSymbol(value, symbol) {\n  var spacing = symbol.space ? ' ' : '';\n  if (symbol.placement === 'Prefix') {\n    return symbol.text + spacing + value;\n  } else {// Assuming 'Suffix' placement by default\n    return value + spacing + symbol.text;\n  }\n}\n\n\n/**\n   * Formats a value with units\n   * @param {number} value\n   * @param {string} units - GNU units format or Forge Unit ID (see https://git.autodesk.com/forge/HFDMSchemas/tree/master/schemas/autodesk/unit)\n   * @param {number} type - For example: 1=boolean, 2=integer, 3=double, 20=string, 24=Position\n   * @param {number} precision - required precision.\n   * @param {Object} [options] - An optional dictionary of options.\n   * @param {boolean} [options.noMixedArea] - For mixed area units such as 'm-and-cm', fallback to the larger unit.\n   * @param {boolean} [options.noMixedVolume] - For mixed volume units such as 'm-and-cm', fallback to the larger unit.\n   * @param {boolean} [options.preferLetters] - For inches and feet, use 'in' and 'ft' over ' and \" respectively.\n   * see https://git.autodesk.com/A360/platform-translation-propertydb/blob/master/propertydb/PropertyDatabase.h\n   * @returns {string} formatted value\n   */\nexport function formatValueWithUnits(value, units, type, precision, options) {\n\n  var result;\n\n  if (precision === null || precision === undefined) {\n    precision = 3;\n  }\n\n  options = options || {};\n  var feetAndInchesSymbols = options.preferLetters ? { feet: ' ft', inches: ' in' } : { feet: '\\'', inches: '\\\"' };\n\n  //Is it a Forge unit?\n  units = forgeUnitToSymbol(units);\n\n  // TODO(go) - 20150504: Ideally this would be handled better: according to the git file at the top property types can be 0,1,2,3,10,11,20,21,22,23,24\n  // TODO(go) - 20150504: The code below only handle Boolean (1) Integer (2) and double (3). Not sure how well the property types are assigned so using\n  // TODO(go) - 20150504: try catch for now.\n  try {\n\n    if (type === 1) {// Boolean\n      result = i18n.translate(value ? 'Yes' : 'No');\n\n    } else if (type === 24) {// Position\n      var position = value.split(' ');\n      result = [];\n\n      for (var i = 0; i < position.length; ++i) {\n        result.push(formatValueWithUnits(parseFloat(position[i]), units, 3, precision));\n      }\n\n      result = result.join(', ');\n\n    } else if ((type === 2 || type === 3) && isNaN(value)) {\n      result = 'NaN';\n\n    } else if (units === 'ft-and-fractional-in') {\n      result = formatFeet(value * 12.0, precision, false, feetAndInchesSymbols);\n\n    } else if (units === 'ft-and-fractional-in^2') {\n      result = options.noMixedArea ?\n      formatNumber(value, precision) + ' ft' + getExponentSymbol(2) :\n      formatFeet(value * 12.0, precision, false, feetAndInchesSymbols) + ' ' + getExponentSymbol(2);\n\n    } else if (units === 'ft-and-fractional-in^3') {\n      result = options.noMixedVolume ?\n      formatNumber(value, precision) + ' ft' + getExponentSymbol(3) :\n      formatFeet(value * 12.0, precision, false, feetAndInchesSymbols) + ' ' + getExponentSymbol(3);\n\n    } else if (units === 'ft-and-decimal-in') {\n      result = formatFeetAndDecimalInches(value, precision, feetAndInchesSymbols);\n\n    } else if (units === 'ft-and-decimal-in^2') {\n      result = options.noMixedArea ?\n      formatNumber(value, precision) + ' ft' + getExponentSymbol(2) :\n      formatFeetAndDecimalInches(value, precision, feetAndInchesSymbols, 2);\n\n    } else if (units === 'ft-and-decimal-in^3') {\n      result = options.noMixedVolume ?\n      formatNumber(value, precision) + ' ft' + getExponentSymbol(3) :\n      formatFeetAndDecimalInches(value, precision, feetAndInchesSymbols, 3);\n\n    } else if (units === 'decimal-in' || units === 'in' || units === 'inch' || units === 'inches') {\n      result = formatNumber(value, precision) + feetAndInchesSymbols.inches;\n\n    } else if (units === 'decimal-in^2' || units === 'in^2' || units === 'inch^2') {\n      result = formatNumber(value, precision) + ' in' + getExponentSymbol(2);\n\n    } else if (units === 'decimal-in^3' || units === 'in^3' || units === 'inch^3') {\n      result = formatNumber(value, precision) + ' in' + getExponentSymbol(3);\n\n    } else if (units === 'decimal-in-sq' || units === 'fractional-in-sq') {\n      result = formatNumber(value, precision) + ' sq. in';\n\n    } else if (units === 'decimal-ft' || units === 'ft' || units === 'feet' || units === 'foot') {\n      result = formatNumber(value, precision) + feetAndInchesSymbols.feet;\n\n    } else if (units === 'decimal-ft^2' || units === 'ft^2' || units === 'feet^2' || units === 'foot^2') {\n      result = formatNumber(value, precision) + ' ft' + getExponentSymbol(2);\n\n    } else if (units === 'decimal-ft^3' || units === 'ft^3' || units === 'feet^3' || units === 'foot^3') {\n      result = formatNumber(value, precision) + ' ft' + getExponentSymbol(3);\n\n    } else if (units === 'decimal-ft-sq' || units === 'ft-and-fractional-in-sq' || units === 'ft-and-decimal-in-sq') {\n      // Not mixing feet and inches in area measurements for this unit set, instead just show square feet.\n      result = formatNumber(value, precision) + ' sq. ft';\n\n    } else if (units === 'fractional-in') {\n      result = formatFeet(value, precision, true, feetAndInchesSymbols);\n\n    } else if (units === 'fractional-in^2') {\n      result = formatFeet(value, precision, true, feetAndInchesSymbols) + getExponentSymbol(2);\n\n    } else if (units === 'fractional-in^3') {\n      result = formatFeet(value, precision, true, feetAndInchesSymbols) + getExponentSymbol(3);\n\n    } else if (units === 'm-and-cm') {\n      result = formatMeterAndCentimeter(value, precision);\n\n    } else if (units === 'm-and-cm^2') {\n      result = options.noMixedArea ?\n      formatNumber(value, precision) + ' m' + getExponentSymbol(2) :\n      formatMeterAndCentimeter(value, precision, 2);\n\n    } else if (units === 'm-and-cm^3') {\n      result = options.noMixedVolume ?\n      formatNumber(value, precision) + ' m' + getExponentSymbol(3) :\n      formatMeterAndCentimeter(value, precision, 3);\n\n    } else if (units && units.text) {\n      var formattedValue = type === 3 ? formatNumber(value, precision) : value;\n      result = formatWithSymbol(formattedValue, units);\n\n    } else if (type === 3 && units) {// Double, with units\n      units = units.replace(\"^2\", getExponentSymbol(2));\n      units = units.replace(\"^3\", getExponentSymbol(3));\n      result = formatNumber(value, precision) + ' ' + units;\n\n    } else if (units) {\n      result = value + ' ' + units;\n\n    } else if (type === 3) {// Double, no units\n      result = formatNumber(value, precision);\n\n    } else {\n      result = value;\n    }\n\n  } catch (e) {\n\n    if (units) {\n      result = value + ' ' + units;\n    } else {\n      result = value;\n    }\n  }\n\n  return result;\n}\n\n/**\n   * Convert distance from unit to unit.\n   * @param {string} fromUnits - GNU units format - units to convert from\n   * @param {string} toUnits - GNU units format - units to convert to\n   * @param {number} calibrationFactor - Calibration Factor of the model\n   * @param {number} d - distance to convert\n   * @param {string} type - default for distance, \"square\" for area\n   * @param {string} dpi - Used to convert points units. default is 72 DPI.\n   * @returns {number} - distance after conversion.\n   */\nexport function convertUnits(fromUnits, toUnits, calibrationFactor, d, type, dpi) {\n\n  calibrationFactor = calibrationFactor ? calibrationFactor : 1;\n  dpi = dpi || 72;\n\n  if (fromUnits === toUnits && calibrationFactor === 1)\n  return d;\n\n  var toFactor = 1;\n  switch (toUnits) {\n    case \"mm\":toFactor = 1000;break;\n    case \"cm\":toFactor = 100;break;\n    case \"m\":toFactor = 1;break;\n    case \"in\":toFactor = 39.37007874;break;\n    case \"ft\":toFactor = 3.280839895;break;\n    case \"ft-and-fractional-in\":toFactor = 3.280839895;break;\n    case \"ft-and-decimal-in\":toFactor = 3.280839895;break;\n    case \"decimal-in\":toFactor = 39.37007874;break;\n    case \"decimal-ft\":toFactor = 3.280839895;break;\n    case \"fractional-in\":toFactor = 39.37007874;break;\n    case \"m-and-cm\":toFactor = 1;break;\n    case \"pt\":toFactor = 39.37007874 * dpi;break;}\n\n\n  var fromFactor = 1;\n  switch (fromUnits) {\n    case \"mm\":fromFactor = 0.001;break;\n    case \"cm\":fromFactor = 0.01;break;\n    case \"m\":fromFactor = 1;break;\n    case \"in\":fromFactor = 0.0254;break;\n    case \"ft\":fromFactor = 0.3048;break;\n    case \"ft-and-fractional-in\":fromFactor = 0.3048;break;\n    case \"ft-and-decimal-in\":fromFactor = 0.3048;break;\n    case \"decimal-in\":fromFactor = 0.0254;break;\n    case \"decimal-ft\":fromFactor = 0.3048;break;\n    case \"fractional-in\":fromFactor = 0.0254;break;\n    case \"m-and-cm\":fromFactor = 1;break;\n    case \"pt\":fromFactor = 0.0254 / dpi;break;}\n\n\n  if (type === \"square\") {\n    return d ? d * Math.pow(toFactor * fromFactor * calibrationFactor, 2) : 0;\n  } else if (type === \"cube\") {\n    return d ? d * Math.pow(toFactor * fromFactor * calibrationFactor, 3) : 0;\n  }\n  return d ? d * toFactor * fromFactor * calibrationFactor : 0;\n}\n\n/**\n   * Count the number of digits after the floating point of a given number.\n   * If the numer is a fraction, count the power of 2 of the denominator.\n   * @param {string | number} number.\n   * @returns {number} - number of digits after the floating point of the given number.\n   */\n\nexport function calculatePrecision(number) {\n\n  if (!number)\n  return 0;\n\n  var digits = number.toString().split(\".\")[1];\n\n  // Try fractional number\n  if (!digits) {\n    var denominatorStrRaw = number.toString().split(\"/\")[1];\n    var denominatorNumberStr = denominatorStrRaw && denominatorStrRaw.match(/\\d+/);\n    if (denominatorNumberStr) {\n      var denominator = parseFloat(denominatorNumberStr);\n      if (denominator && !isNaN(denominator)) {\n        return Math.floor(Math.log2(denominator));\n      }\n    }\n\n    return 0;\n  }\n  digits = digits.match(/\\d+/);\n  return digits && digits[0] && digits[0].length || 0;\n}\n\n\n/**\n   *\n   * @param {number} value\n   * @param {number} valueType - For example: 1=boolean, 2=integer, 3=double, 20=string, 24=Position\n   * @param {string} sourceUnits\n   * @param {string} targetUnits\n   */\nexport function convertToDisplayUnits(value, valueType, sourceUnits, targetUnits) {\n  if (!sourceUnits || !targetUnits) {\n    return { displayValue: value, displayUnits: sourceUnits };\n  }\n\n  var baseUnits = sourceUnits;\n  var displayUnits = targetUnits;\n\n  // Area or volume?\n  var distanceType;\n  if (/\\^2$/.test(baseUnits)) {\n    baseUnits = baseUnits.replace('^2', '');\n    displayUnits += '^2';\n    distanceType = \"square\";\n  } else if (/\\^3$/.test(baseUnits)) {\n    baseUnits = baseUnits.replace('^3', '');\n    displayUnits += '^3';\n    distanceType = \"cube\";\n  }\n\n  // Skip conversion if source unit is not a supported display unit\n  // for e.g., mass and density\n  baseUnits = getUnitEnum(baseUnits);\n  if (baseUnits === null) {\n    return { displayValue: value, displayUnits: sourceUnits };\n  }\n\n  // Only convert numerical values\n  if (valueType === 2 /*integer*/ || valueType === 3 /*double*/) {\n      var displayValue = convertUnits(baseUnits, targetUnits, 1, value, distanceType, null);\n      return { displayValue: displayValue, displayUnits: displayUnits };\n    } else if (valueType === 24 /*position*/) {\n      var position = value.\n      split(' ').\n      map(function (v) {return convertUnits(baseUnits, targetUnits, 1, v, distanceType, null);}).\n      join(' ');\n\n      return { displayValue: position, displayUnits: displayUnits };\n    }\n\n\n  return { displayValue: value, displayUnits: sourceUnits };\n}","export var UnitParser = {};\n\n// Based on https://github.com/dobriai/footinch/blob/master/lib/parse.js\nfunction _parse(strIn, base, bigUnitSigns, smallUnitsSigns) {\n  if (!strIn) {\n    return NaN;\n  }\n\n  strIn = strIn.toString();\n\n  var str = strIn.trim();\n  if (str.length == 0) {\n    return NaN;\n  }\n\n  var lm;\n  var bigUnits = bigUnitSigns.join('| *');\n  var smallUnits = smallUnitsSigns.join('| *');\n\n  // Try +-: 1/2\", 11/16\"; trailing space OK, but nothing else\n  // Note: Trailing \" is mandatory!\n  {\n    lm = str.match(new RegExp('^([+-]?\\\\d+)(?: *)\\/(?: *)(\\\\d+)(?: *)(?:' + smallUnits + ') *$'));\n    if (lm) {\n      return parseFloat(lm[1]) / parseFloat(lm[2]) / base;\n    }\n  }\n\n  // Try +-: 1/2', 11/16; trailing space OK, but nothing else\n  {\n    lm = str.match(new RegExp('^([+-]?\\\\d+)(?: *)\\/(?: *)(\\\\d+)(?: *)(?:' + bigUnits + ')? *$'));\n    if (lm) {\n      return parseFloat(lm[1]) / parseFloat(lm[2]);\n    }\n  }\n\n  // Try +-: 5, 1.2e7, .1e+2, 3e-1, 3.e1\n  var firstFloat = NaN;\n  {\n    lm = str.match(/^[+-]? *(?:\\d+(\\.\\d*)?|\\.\\d+)(e[+-]?\\d+)?/i);\n    if (!lm) {\n      return NaN;\n    }\n    firstFloat = parseFloat(lm[0].replace(/ */g, '')); // Clear spaces on the way\n    str = str.slice(lm[0].length); // Don't trim just yet!\n  }\n\n  str = str.replace('-', ' ');\n\n  if (str.length == 0 || isNaN(firstFloat)) {\n    return firstFloat;\n  }\n\n  var sgn = Math.sign(firstFloat);\n  if (sgn === 0) {\n    sgn = 1;\n  }\n\n  // If inches, then end of story\n  if (str.match(new RegExp('^(?: *)(?:' + smallUnits + ') *$', 'i'))) {\n    return firstFloat / base;\n  }\n\n  {\n\n    lm = str.match(new RegExp('^ +(\\\\d+)(?: *)\\/(?: *)(\\\\d+)(?: *)(?:' + smallUnits + ') *$', 'i'));\n    if (lm) {\n      // If original input was: 7 11/16\"\n      return (firstFloat + sgn * parseFloat(lm[1]) / parseFloat(lm[2])) / base;\n    }\n  }\n\n  {\n    lm = str.match(new RegExp('^(?: *)(?:' + bigUnits + '|-| +-?) *', 'i')); // Order matters here!\n    if (!lm) {\n      return NaN;\n    }\n    str = str.slice(lm[0].length).trim();\n    if (str.length == 0) {\n      if (lm[0].match(/-/)) {\n        return NaN; // Trailing dash - e.g. strIn was: 7-\n      }\n      return firstFloat;\n    }\n  }\n\n  // Now we can only have left: 2, 2.3, 7/8, 2 7/8, with an optional \" at the end\n  {\n    lm = str.match(new RegExp('^(\\\\d+(?:\\\\.\\\\d*)?)(?: *)(?:' + smallUnits + ')? *$'));\n    if (lm) {\n      return firstFloat + sgn * parseFloat(lm[1]) / base;\n    }\n\n    lm = str.match(new RegExp('^(\\\\d+)(?: *)\\/(?: *)(\\\\d+)(?: *)(?:' + smallUnits + ')? *$'));\n    if (lm) {\n      return firstFloat + sgn * (parseFloat(lm[1]) / parseFloat(lm[2])) / base;\n    }\n\n    lm = str.match(new RegExp('^(\\\\d+) +(\\\\d+)(?: *)\\/(?: *)(\\\\d+)(?: *)(?:' + smallUnits + ')? *$'));\n    if (lm) {\n      return firstFloat + sgn * (parseFloat(lm[1]) + parseFloat(lm[2]) / parseFloat(lm[3])) / base;\n    }\n  }\n\n  return NaN;\n}\n\n/**\n   * Parses a string of fractional feet or decimal feet to a decimal feet number\n   * @param {string} input - input string of the number\n   * @returns {number} parsed value represented as a number\n   */\nUnitParser.parseFeet = function (input) {\n  return _parse(input, 12.0, ['ft', 'feet', '\\'', '`', '‘', '’'], ['in', 'inch', '\\\\\"', '\\'\\'', '``', '‘‘', '’’']);\n};\n\n\nUnitParser.parseMeter = function (input) {\n  return _parse(input, 100.0, ['m', 'meter'], ['cm', 'centimeter']);\n};\n\n/**\n    * Parses a string of fractional or decimal number into a decimal number.\n    * Valid input examples: 1, 1.2e3, -2, 2cm, 4\", 4.1', 1 2/3, 1 2 3/4, 1 2-3/4, 1ft 2-3/4in, 1' 2-3/4\"\n    * \n    * @param {string} input - input string of the number.\n    * @param {string} inputUnits - the type of the units of the number.\n    * @returns {number} parsed value represented as a decimal number.\n    */\nUnitParser.parseNumber = function (input, inputUnits) {\n  switch (inputUnits) {\n    case 'ft':\n    case 'decimal-ft':\n    case 'ft-and-fractional-in':\n    case 'ft-and-decimal-in':\n    case 'decimal-in':\n    case 'fractional-in':\n      return UnitParser.parseFeet(input);\n\n    case '':\n    case 'm':\n    case 'cm':\n    case 'mm':\n    case 'm-and-cm':\n    default:\n      return UnitParser.parseMeter(input);}\n\n};\n\nUnitParser.parsePositiveNumber = function (input, inputUnits) {\n  var parsedNumber = UnitParser.parseNumber(input, inputUnits);\n  return parsedNumber >= 0 ? parsedNumber : NaN;\n};","import { getGlobal } from '../compat';\n\nvar _window = getGlobal();\n/**\n                            * Mobile callbacks wrapper, consolidating all calls to iOS and Android platforms\n                            */\n\nexport function MobileCallbacks() {\n  this.ios = _window.webkit;\n  this.android = _window.JSINTERFACE;\n\n  this.iosSend = function (commandName, args) {\n    return _window.webkit.messageHandlers.callbackHandler.postMessage({ 'command': commandName, 'data': args });\n  };\n\n  this.androidSend = _window.JSINTERFACE;\n}\n\nvar proto = MobileCallbacks.prototype;\n\nproto.animationReady = function () {\n  if (this.ios)\n  this.iosSend('animationReady');else\n  if (this.android)\n  this.androidSend.animationReady();\n};\n\nproto.onSelectionChanged = function (dbId) {\n  if (this.ios)\n  this.iosSend('selectionChanged', dbId);else\n  if (this.android)\n  this.androidSend.onSelectionChanged(dbId);\n};\n\nproto.onLongTap = function (clientX, clientY) {\n  if (this.ios)\n  this.iosSend('onLongTap', [clientX, clientY]);else\n  if (this.android)\n  this.androidSend.onLongTap(clientX, clientY);\n};\n\nproto.onSingleTap = function (clientX, clientY) {\n  if (this.ios)\n  this.iosSend('onSingleTap', [clientX, clientY]);else\n  if (this.android)\n  this.androidSend.onSingleTap(clientX, clientY);\n};\n\nproto.onDoubleTap = function (clientX, clientY) {\n  if (this.ios)\n  this.iosSend('onDoubleTap', [clientX, clientY]);else\n  if (this.android)\n  this.androidSend.onDoubleTap(clientX, clientY);\n};\n\nproto.setRTCSession = function (id) {\n  if (this.ios)\n  this.iosSend('setRTCSession', { 'id': id });else\n  if (this.android)\n  this.androidSend.setRTCSessionID(id);\n};\n\nproto.putProperties = function (name, value) {\n  if (this.ios)\n  this.iosSend('putProperties', { 'name': name, 'value': value });else\n  if (this.android)\n  this.androidSend.putProperties(name, value);\n};\n\nproto.onPropertyRetrievedSuccess = function () {\n  if (this.ios)\n  this.iosSend('onPropertyRetrievedSuccess');else\n  if (this.android)\n  this.androidSend.onPropertyRetrievedSuccess();\n};\n\nproto.onPropertyRetrievedFailOrEmptyProperties = function () {\n  if (this.ios)\n  this.iosSend('onPropertyRetrievedFailOrEmptyProperties');else\n  if (this.android)\n  this.androidSend.onPropertyRetrievedFailOrEmptyProperties();\n};\n\nproto.resetAnimationStatus = function () {\n  if (this.ios)\n  this.iosSend('resetAnimationStatus');else\n  if (this.android)\n  this.androidSend.resetAnimationStatus();\n};\n\nproto.setPauseUI = function () {\n  if (this.ios)\n  this.iosSend('setPauseUI');else\n  if (this.android)\n  this.androidSend.setToPaused();\n};\n\nproto.getDeviceAvailableMemory = function () {\n  // Returns a JSON in the format of:\n  // {\"platform\": \"Android\", \"device\": \"hammerhead\", \"model\": \"Nexus 5\", \"os\": \"6.0\", \"totalmem\": 1945100288, \"availbytes\": 907812864}\n  if (this.ios)\n  return this.iosSend('getDeviceAvailableMemory');else\n  if (this.android)\n  return this.androidSend.getDeviceAvailableMemory();\n};\n\nproto.onDeviceMemoryInsufficient = function () {\n  if (this.ios)\n  return this.iosSend('onDeviceMemoryInsufficient');else\n  if (this.android)\n  return this.androidSend.onDeviceMemoryInsufficient();\n};\n\nproto.updateAnimationTime = function (time) {\n  if (this.ios)\n  this.iosSend('updateAnimationTime', time);else\n  if (this.android)\n  this.androidSend.updateAnimationTime(time);\n};\n\n\nproto.setLoadingProgress = function (state, progress) {\n  if (this.ios)\n  this.iosSend('setLoadingProgress', { 'state': state, 'progress': progress });else\n  if (this.android)\n  this.androidSend.setLoadingProgress(state, progress);\n};\n\nproto.objectTreeCreated = function () {\n  if (this.ios)\n  this.iosSend('objectTreeCreated');else\n  if (this.android)\n  this.androidSend.objectTreeCreated();\n};\n\nproto.geometryLoaded = function () {\n  if (this.ios)\n  this.iosSend('geometryLoaded');else\n  if (this.android)\n  this.androidSend.geometryLoaded();\n};\n\nproto.putSheets = function (geomName, geomGuid) {\n  if (this.ios)\n  this.iosSend('putSheets', [geomName, geomGuid]);else\n  if (this.android)\n  this.androidSend.putSheets(geomName, geomGuid);\n};\n\nproto.putAllSheets = function (sheets) {\n  if (this.ios)\n  this.iosSend('putAllSheets', sheets);else\n  if (this.android)\n  this.androidSend.putAllSheets(sheets);\n};\n\nproto.hideLoadingView = function () {\n  if (this.android)\n  this.androidSend.hideLoadingView();\n};\n\nproto.instanceTree = function (treeJson) {\n  if (this.ios)\n  this.iosSend('instanceTree', treeJson);else\n  if (this.android)\n  this.androidSend.instanceTree(treeJson);\n};\n\nproto.loadSheetFailed = function () {\n  if (this.ios)\n  this.iosSend('loadSheetFailed');else\n  if (this.android)\n  this.androidSend.loadSheetFailed();\n};\n\nproto.sheetSelected = function (sheet) {\n  if (this.ios)\n  this.iosSend('sheetSelected', sheet);else\n  if (this.android)\n  this.androidSend.sheetSelected(sheet);\n};\n\nif (typeof window !== \"undefined\")\n_window.MobileCallbacks = MobileCallbacks; // Backwards compatibility. Consider removing.","\n//This file is the first one when creating the bundled build and\n//initializes some global namespaces and other global variables.\n//Once the code is fully modular, the creation of the global namespace\n//can/should be moved to the module-suffix instead.\n\nfunction getGlobal() {\n  return typeof window !== \"undefined\" && window !== null ?\n  window :\n  typeof self !== \"undefined\" && self !== null ?\n  self :\n  global;\n}\n\n/**\r\n   * Create namespace\r\n   * @param {string} s - namespace (e.g. 'Autodesk.Viewing')\r\n   * @return {Object} namespace\r\n   */\nfunction AutodeskNamespace(s) {\n  var ns = getGlobal();\n\n  var parts = s.split('.');\n  for (var i = 0; i < parts.length; ++i) {\n    ns[parts[i]] = ns[parts[i]] || {};\n    ns = ns[parts[i]];\n  }\n\n  return ns;\n}\n\n// Define the most often used ones\nAutodeskNamespace(\"Autodesk.Viewing.Private\");\n\nAutodeskNamespace(\"Autodesk.Viewing.Extensions\");\nAutodeskNamespace(\"Autodesk.Extensions\"); // Webpack bundled extensions.\n\nAutodeskNamespace(\"Autodesk.Viewing.Shaders\");\n\nAutodeskNamespace('Autodesk.Viewing.UI');\n\nAutodeskNamespace('Autodesk.LMVTK');\n\nAutodesk.Viewing.getGlobal = getGlobal;\nAutodesk.Viewing.AutodeskNamespace = AutodeskNamespace;\ngetGlobal().AutodeskNamespace = AutodeskNamespace;\n\n\n//TODO: find a way to get those out of here or at least\n//out of the avp namespace\n/** @define {string} */\nvar avp = getGlobal().Autodesk.Viewing.Private;\navp.LMV_WORKER_URL = BUILD_FLAG__LMV_WORKER_FILE; // See webpack.js\n\navp.ENABLE_DEBUG = avp.ENABLE_DEBUG || false;\ngetGlobal().ENABLE_DEBUG = avp.ENABLE_DEBUG;\n//avp.DEBUG_SHADERS = avp.DEBUG_SHADERS || false; // will be moved to wgs.js\n\n//Set to true when we need to load the web worker via XHR and create\n//it as a data blob URL. Needed for IE11+CORS, all other cases\n//can set this to false. If you need to debug the worker, set this to false also.\navp.ENABLE_INLINE_WORKER = BUILD_FLAG__INLINE_WORKER;\n\nmodule.exports.Autodesk = getGlobal().Autodesk;","// Map module exports to Autodesk.* namespaces for backwards API compatibility.\n// Input is the module returned by require(\"index.js\")\nexport function initializeLegacyNamespaces(LMV) {\n  var av = Autodesk.Viewing;\n  var avp = av.Private;\n  var avu = av.UI;\n  var ave = av.Extensions;\n\n  //Move exports from module into viewer namespaces\n  for (var m in LMV.av) {\n    av[m] = LMV.av[m];\n  }\n\n  for (var _m in LMV.avp) {\n    avp[_m] = LMV.avp[_m];\n  }\n\n  for (var _m2 in LMV.avu) {\n    avu[_m2] = LMV.avu[_m2];\n  }\n\n  for (var _m3 in LMV.ave) {\n    ave[_m3] = LMV.ave[_m3];\n  }\n\n  //Put those in the global module for compatibility with existing code\n  //that does not consistently require(\"three\").\n  av.getGlobal().THREE = LMV.THREE;\n  av.getGlobal().LMV = LMV;\n\n  //Fix namespaces for functions that are exported from private modules but need to be in the\n  //av namespace or from public ones that need to be in the avp namespace.\n  //This needs to be cleaned up more comprehensively, because presumably anything exported\n  //in the global namespace should be considered public, and anything that is currently in avp\n  //should not be exported outside the webpack build.\n\n  avp.isRightClick = av.isRightClick; //Used by Markups extension\n  avp.isMiddleClick = av.isMiddleClick;\n}","\nimport { EventDispatcher } from \"../application/EventDispatcher\";\nimport { MessageClient } from \"./MessageClient\";\nimport { ViewerState } from \"../application/ViewerState\";\nimport * as et from \"../application/EventTypes\";\nimport { GlobalManagerMixin } from \"../application/GlobalManagerMixin\";\n\n\nexport function LiveReviewClient(viewer) {\n\n  this.viewer = viewer;\n  this.setGlobalManager(viewer.globalManager);\n  this.messageClient = null;\n  this.presenceChannelId = null;\n  this.viewtx = null;\n  this.interceptor = null;\n};\n\nGlobalManagerMixin.call(LiveReviewClient.prototype);\n\nLiveReviewClient.prototype.destroy = function () {\n  this.leaveLiveReviewSession();\n};\n\nLiveReviewClient.prototype.joinLiveReviewSession = function (sessionId) {\n\n  if (!this.messageClient)\n  this.messageClient = MessageClient.GetInstance();\n  if (!this.presenceChannelId)\n  this.presenceChannelId = this.getWindow().location.host;\n  if (!this.messageClient.isConnected()) {\n    this.messageClient.connect(sessionId);\n  }\n\n  if (!this.viewtx) {\n    this.viewtx = new ViewTransceiver(this.messageClient);\n    this.viewtx.setGlobalManager(this.globalManager);\n  }\n  this.viewtx.channelId = sessionId;\n  this.viewtx.attach(this.viewer);\n\n  this.messageClient.join(this.viewtx.channelId);\n\n  if (!this.interceptor)\n  this.interceptor = new InteractionInterceptor(this.viewtx);\n  this.viewer.toolController.registerTool(this.interceptor);\n  this.viewer.toolController.activateTool(this.interceptor.getName());\n};\n\nLiveReviewClient.prototype.leaveLiveReviewSession = function () {\n  this.viewtx && this.viewtx.detach(this.viewer);\n  this.messageClient && this.messageClient.disconnect();\n  if (this.interceptor) {\n    this.viewer.toolController.deactivateTool(this.interceptor.getName());\n  }\n\n  this.viewtx = null;\n  this.messageClient = null;\n  this.interceptor = null;\n};\n\n\n\nexport function InteractionInterceptor(viewtx) {\n\n  this.getNames = function () {\n    return [\"intercept\"];\n  };\n\n  this.getName = function () {\n    return \"intercept\";\n  };\n\n  this.activate = function (name) {};\n  this.deactivate = function (name) {};\n  this.update = function (timeStamp) {return false;};\n\n  this.handleSingleClick = function (event, button) {return false;};\n  this.handleDoubleClick = function (event, button) {return false;};\n  this.handleSingleTap = function (tap) {return false;};\n  this.handleDoubleTap = function (tap1, tap2) {return false;};\n  this.handleKeyDown = function (event, keyCode) {return false;};\n  this.handleKeyUp = function (event, keyCode) {return false;};\n\n  this.handleWheelInput = function (delta) {\n    viewtx.takeControl();\n    return false;\n  };\n\n  this.handleButtonDown = function (event, button) {\n    viewtx.takeControl();\n    return false;\n  };\n\n  this.handleButtonUp = function (event, button) {return false;};\n  this.handleMouseMove = function (event) {\n    viewtx.updatePointer(event);\n    return false;\n  };\n\n  this.handleGesture = function (event) {\n    viewtx.takeControl();\n    return false;\n  };\n\n  this.handleBlur = function (event) {return false;};\n  this.handleResize = function () {};\n}\n\nexport function ViewTransceiver(client) {\n\n  var _this = this;\n  var _viewer = this.viewer = null;\n  var _blockEvents = false;\n  var _haveControl = false;\n  var _isDisconnected = false;\n  var _lastInControl;\n  var _client = this.client = client;\n  var _ray = new THREE.Ray();\n  var _pointer = null;\n  var _pointerOn = false;\n\n  this.channelId = null;\n\n  var _viewerState;\n  var VIEWER_STATE_FILTER = {\n    seedURN: false,\n    objectSet: true,\n    viewport: false,\n    cutplanes: true,\n    renderOptions: {\n      environment: false,\n      ambientOcclusion: false,\n      toneMap: {\n        exposure: false },\n\n      appearance: false } };\n\n\n\n\n  function onViewerState(evt) {\n    _blockEvents = true;\n    var state = JSON.parse(evt.data.msg);\n    _viewerState.restoreState(state);\n    _viewer.impl.invalidate(true, false, true);\n    _blockEvents = false;\n  }\n\n  function reduceBits(v) {\n    return Math.round(v * 1000) / 1000;\n  }\n\n  function reduceBitsV(v) {\n    for (var i = 0; i < v.length; i++) {\n      v[i] = reduceBits(v[i]);}\n  }\n\n  function onCamera(e) {\n    var v = e.data.msg;\n\n    if (v[1] === true || _isDisconnected)\n    {\n      return;\n    }\n\n    if (v[0] != _lastInControl)\n    {\n      _lastInControl = v[0];\n      e.data.lastInControl = v[0];\n      _this.dispatchEvent({ type: \"controlChange\", channelId: _this.channelId, data: e.data });\n    }\n\n    //For now, automatically relinquish camera control if we receive a remote command to move the camera\n    _haveControl = false;\n\n    /*\n                           viewer.navigation.setRequestTransitionWithUp(true, new THREE.Vector3().set(v[1+0],v[1+1],v[1+2]),\n                           new THREE.Vector3().set(v[1+3],v[1+4],v[1+5]),\n                           _viewer.navigation.getCamera().fov,\n                           new THREE.Vector3().set(v[1+6],v[1+7],v[1+8]));\n                           */\n\n    _viewer.navigation.setView(new THREE.Vector3().set(v[2 + 0], v[2 + 1], v[2 + 2]),\n    new THREE.Vector3().set(v[2 + 3], v[2 + 4], v[2 + 5]));\n    _viewer.navigation.setCameraUpVector(new THREE.Vector3().set(v[2 + 6], v[2 + 7], v[2 + 8]));\n  }\n\n  function sendCamera(evt) {\n    if (!_haveControl && !_isDisconnected)\n    return;\n\n    var c = evt.camera;\n    var camParams = [c.position.x, c.position.y, c.position.z,\n    c.target.x, c.target.y, c.target.z,\n    c.up.x, c.up.y, c.up.z];\n\n\n    reduceBitsV(camParams);\n    camParams.unshift(_isDisconnected);\n    camParams.unshift(client.getLocalId());\n\n    _client.sendMessage(\"camera\", camParams, _this.channelId);\n\n    if (_lastInControl != camParams[0]) {\n      _lastInControl = camParams[0];\n      _this.dispatchEvent({ type: \"controlChange\", channelId: _this.channelId, data: { lastInControl: _lastInControl } });\n    }\n  }\n\n\n  function showPointer(show, x, y) {\n\n    var _document = _this.getDocument();\n    if (show && !_pointer) {\n      _pointer = _document.createElement(\"div\");\n      _pointer.classList.add(\"collabPointer\");\n    }\n\n    if (show && !_pointerOn) {\n      _viewer.container.appendChild(_pointer);\n      _pointerOn = true;\n    } else\n    if (!show && _pointerOn) {\n      _viewer.container.removeChild(_pointer);\n      _pointerOn = false;\n    }\n\n    if (show) {\n      //Note the 4px is half the width/height specified in the CSS,\n      //so that the pointer is centered.\n      _pointer.style.left = x - 6 + \"px\";\n      _pointer.style.top = y - 6 + \"px\";\n    }\n\n  }\n\n  function onPointer(e) {\n\n    if (_haveControl)\n    return; //shouldn't get here in theory, but let's check just in case\n\n    if (_isDisconnected)\n    return; //we can't show the pointer if the views don't match\n\n    var v = e.data.msg;\n    _ray.origin.set(v[1], v[2], v[3]);\n    _ray.direction.set(v[4], v[5], v[6]);\n\n    var pt = _ray.at(_viewer.getCamera().near);\n    pt.project(_viewer.getCamera());\n\n    pt = _viewer.impl.viewportToClient(pt.x, pt.y);\n\n    //logger.log(pt.x + \" \" + pt.y);\n    showPointer(true, pt.x, pt.y);\n  }\n\n\n  function sendPointer(evt) {\n    if (!_haveControl)\n    return;\n\n    //Note canvasX/Y are set by the ToolController to clientX/Y - canvas left/top.\n    var vpVec = _viewer.impl.clientToViewport(evt.canvasX, evt.canvasY);\n    _viewer.impl.viewportToRay(vpVec, _ray);\n\n    var rayParams = [_ray.origin.x, _ray.origin.y, _ray.origin.z,\n    _ray.direction.x, _ray.direction.y, _ray.direction.z];\n\n    reduceBitsV(rayParams);\n    rayParams.unshift(client.getLocalId());\n\n    _client.sendMessage(\"pointer\", rayParams, _this.channelId);\n  }\n\n\n  function sendViewerState(e) {\n    //if (!_haveControl)\n    //    return;\n    if (_blockEvents)\n    return;\n\n    var state = _viewerState.getState(VIEWER_STATE_FILTER);\n\n    // TODO: if we kill the socket.io code path, this could be optimized\n    // too by removing the JSON.stringify of the state. Pubnub automatically\n    // does JSON serialization for us, with optimizations accordingly to their manual.\n    client.sendMessage(\"state\", JSON.stringify(state), _this.channelId);\n  }\n\n\n  this.takeControl = function () {\n    _haveControl = true;\n    showPointer(false);\n  };\n\n  this.updatePointer = function (e) {\n    sendPointer(e);\n  };\n\n  this.connectCamera = function (set) {\n    _isDisconnected = !set;\n  };\n\n  this.attach = function (viewer, skipStateTracking) {\n\n    if (_viewer)\n    this.detach();\n\n    this.viewer = _viewer = viewer;\n    _viewerState = new ViewerState(_viewer);\n\n    _client.addEventListener(\"cameraChange\", onCamera);\n    _client.addEventListener(\"pointerMove\", onPointer);\n\n    if (!_viewer.hasEventListener(et.CAMERA_CHANGE_EVENT, sendCamera))\n    _viewer.addEventListener(et.CAMERA_CHANGE_EVENT, sendCamera);\n\n    if (!skipStateTracking) {\n      _client.addEventListener(\"viewerState\", onViewerState);\n\n      if (!_viewer.hasEventListener(et.SELECTION_CHANGED_EVENT, sendViewerState)) {\n        _viewer.addEventListener(et.SELECTION_CHANGED_EVENT, sendViewerState);\n        _viewer.addEventListener(et.ISOLATE_EVENT, sendViewerState);\n        _viewer.addEventListener(et.HIDE_EVENT, sendViewerState);\n        _viewer.addEventListener(et.SHOW_EVENT, sendViewerState);\n        _viewer.addEventListener(et.EXPLODE_CHANGE_EVENT, sendViewerState);\n        _viewer.addEventListener(et.LAYER_VISIBILITY_CHANGED_EVENT, sendViewerState);\n        _viewer.addEventListener(et.CUTPLANES_CHANGE_EVENT, sendViewerState);\n      }\n    }\n  };\n\n\n  this.detach = function () {\n\n    showPointer(false);\n\n    if (_client) {\n      _client.removeEventListener(\"cameraChange\", onCamera);\n      _client.removeEventListener(\"viewerState\", onViewerState);\n    }\n\n    if (_viewer) {\n      _viewer.removeEventListener(et.CAMERA_CHANGE_EVENT, sendCamera);\n\n      _viewer.removeEventListener(et.SELECTION_CHANGED_EVENT, sendViewerState);\n      _viewer.removeEventListener(et.ISOLATE_EVENT, sendViewerState);\n      _viewer.removeEventListener(et.HIDE_EVENT, sendViewerState);\n      _viewer.removeEventListener(et.SHOW_EVENT, sendViewerState);\n      _viewer.removeEventListener(et.EXPLODE_CHANGE_EVENT, sendViewerState);\n      _viewer.removeEventListener(et.LAYER_VISIBILITY_CHANGED_EVENT, sendViewerState);\n      _viewer.removeEventListener(et.CUTPLANES_CHANGE_EVENT, sendViewerState);\n\n      this.viewer = _viewer = null;\n      _viewerState = null;\n    }\n  };\n\n}\n\nViewTransceiver.prototype.constructor = ViewTransceiver;\nEventDispatcher.prototype.apply(ViewTransceiver.prototype);\nGlobalManagerMixin.call(ViewTransceiver.prototype);","\nimport { logger } from \"../logger/Logger\";\nimport { EventDispatcher } from \"../application/EventDispatcher\";\nimport { getEnv } from \"../file-loaders/net/endpoints\";\nimport { EnvironmentConfigurations } from \"../envinit\";\nimport { getGlobal } from \"../compat\";\n\nvar config = {\n  userName: \"\" };\n\n\nexport function setUserName(name) {\n  config.userName = name;\n}\n\nvar myio; //delay initialized pointer to socket.io library\n\n/** @constructor\r\n *\r\n *  MessageClient\r\n *  Constructs a message client object, used for server-mediate publish/subscribe\r\n *  message passing between connected users.\r\n *\r\n */\nexport function MessageClient(serverUrls, serverPath) {\n\n  //Maps web socket commands to event types\n  var MESSAGE_MAP = {\n    \"camera\": \"cameraChange\",\n    \"pointer\": \"pointerMove\",\n    \"joystick\": \"joystick\",\n    \"state\": \"viewerState\",\n    \"txt\": \"chatReceived\",\n    \"joinok\": \"userListChange\",\n    \"sessionId\": \"connectSucceeded\",\n    \"joined\": \"userListChange\",\n    \"left\": \"userListChange\",\n    \"private\": \"privateMessage\",\n    \"join_error\": \"socketError\" };\n\n\n\n  var _socket;\n  var _myID = null;\n\n  var _serverURL = Array.isArray(serverUrls) ? serverUrls : [serverUrls];\n  var _currentServer = 0;\n\n  var _pendingJoins = {};\n\n  var _channels = {};\n\n\n  var _this = this;\n\n  function getUserName() {\n    if (config.userName && config.userName.length)\n    return config.userName;\n\n    if (_myID)\n    return _myID.slice(0, 5);\n\n    return \"Unknown\";\n  }\n\n\n\n  function onRecv(msg) {\n\n    //See if the message requires internal processing\n    switch (msg.type) {\n\n      case \"txt\":onChat(msg);\n        break;\n\n      case \"joinok\":onJoinOK(msg);\n        break;\n\n      case \"join_error\":break;\n\n      case \"sessionId\":\n        logger.info(\"Connect successful, your id is: \" + msg.id);\n        _myID = msg.id;\n        break;\n\n      case \"joined\":msg.userStatus = \"joined\";\n        onJoined(msg);\n        break;\n      case \"left\":msg.userStatus = \"left\";\n        onLeft(msg);\n        break;\n      case \"camera\":\n      case \"pointer\":break;\n      default:logger.log(msg);\n        break;}\n\n\n    //Determine what channel we are receiving the event on.\n    //For example, a user list change can occur on either the collaboration channel (users in current session)\n    //or on the presence channel (all users logged in), and the various GUI event handlers have to make decisions based\n    //on that.\n    var channelId = msg.roomId;\n\n    //And send it to all listeners\n    var evt = { type: MESSAGE_MAP[msg.type], data: msg, channelId: channelId };\n    _this.dispatchEvent(evt);\n  }\n\n  function onJoined(evt) {\n    if (!evt.user.name || !evt.user.name.length)\n    evt.user.name = evt.user.id.slice(0, 5);\n\n    if (evt.roomId) {\n      var channel = _channels[evt.roomId];\n      if (channel) {\n        channel.users.push(evt.user);\n        logger.info(evt.user + \" joined room \" + evt.roomId);\n      } else {\n        logger.warn(\"Channel \" + evt.roomId + \" does not exist for socket \" + _myID);\n      }\n    }\n  }\n\n  function onLeft(evt) {\n    logger.info(evt.user + \" left room \" + evt.room);\n    for (var channelId in _channels) {\n      var users = _channels[channelId].users;\n\n      var idx = -1;\n      for (var i = 0; i < users.length; i++) {\n        if (users[i].id == evt.user) {\n          idx = i;\n          break;\n        }\n      }\n\n      if (idx != -1)\n      users.splice(idx, 1);\n\n      delete _channels[channelId].userSet[evt.user];\n    }\n  }\n\n  function onJoinOK(evt) {\n\n    var channel = _channels[evt.roomId];\n\n    logger.info(\"joined channel \" + evt.roomId);\n\n    if (evt.users && evt.users.length) {\n      channel.users = evt.users;\n    } else {\n      channel.users = [];\n    }\n\n    for (var i = 0; i < channel.users.length; i++) {\n\n      //Make up a user name if one is not known\n      if (!channel.users[i].name || !channel.users[i].name.length) {\n        channel.users[i].name = channel.users[i].id.slice(0, 5);\n      }\n    }\n\n    var name = getUserName();\n    var you = Autodesk.Viewing.i18n.translate(\"you\");\n    var me = { id: _myID, name: name + \" (\" + you + \")\", isSelf: true, status: 0 };\n    if (!channel.userSet[_myID]) {\n      channel.users.push(me);\n      channel.userSet[_myID] = me;\n    }\n\n    //In case user name is already known, update the server.\n    if (me.id.indexOf(name) != 0) {\n      _this.sendChatMessage(\"/nick \" + name, evt.roomId);\n    }\n  }\n\n\n  function onChat(evt) {\n    if (evt.msg.indexOf(\"/nick \") == 0) {\n      var user = _this.getUserById(evt.from, evt.roomId);\n      var newname = evt.msg.slice(6);\n\n      if (newname.length) {\n        user.name = newname;\n        if (user.id == _myID) {\n          var you = Autodesk.Viewing.i18n.translate(\"you\");\n          user.name += \" (\" + you + \")\";\n        }\n      }\n\n      _this.dispatchEvent({ type: \"userListChange\", data: evt, channelId: evt.roomId });\n    }\n  }\n\n  function onConnectError(evt) {\n\n    //Attempt to connect to another server in case\n    //the primary fails. If they all fail, then we give up.\n    if (_currentServer < _serverURL.length) {\n\n      logger.info(\"Connect failed, trying another server...\");\n\n      _socket.disconnect();\n      _socket = null;\n      _currentServer++;\n      _this.connect(_this.sessionID);\n\n    } else {\n\n      _this.dispatchEvent({ type: \"socketError\", data: evt });\n\n    }\n  }\n\n  function onError(evt) {\n\n    _this.dispatchEvent({ type: \"socketError\", data: evt });\n\n  }\n\n  function onConnect(evt) {\n    _currentServer = 0;\n\n    //Join any channels that were delayed while the\n    //connection is established.\n    for (var p in _pendingJoins) {\n      _this.join(p);\n    }\n  }\n\n  /**\r\n     * Establish initial connection to the server specified when constructing the message client.\r\n     */\n  this.connect = function (sessionID) {\n\n    //TODO: Maintain multiple sockets to the same server, identifier by sessionID.\n\n    if (_socket)\n    return; //already connected to socket server.\n\n    if (typeof window.WebSocket !== \"undefined\") {\n\n      if (!myio)\n      myio = typeof lmv_io !== \"undefined\" ? lmv_io : io;\n\n      this.sessionID = sessionID;\n\n      _socket = myio.connect(_serverURL[_currentServer] + \"?sessionID=\" + sessionID, { path: serverPath, forceNew: true });\n      _socket.on(\"connect\", onConnect);\n      _socket.on(\"message\", onRecv);\n      _socket.on(\"connect_error\", onConnectError);\n      _socket.on(\"error\", onError);\n\n      return true;\n    } else\n    {\n      return false;\n    }\n  };\n\n  /**\r\n      * Subscribe to a messaging channel. Requires connection to be active (i.e. connect() called before join()).\r\n      */\n  this.join = function (channelId) {\n\n    if (!_socket || !_socket.connected) {\n      _pendingJoins[channelId] = 1;\n      return;\n    }\n\n    delete _pendingJoins[channelId];\n\n    _channels[channelId] = {\n      id: channelId,\n      users: [],\n      userSet: {} };\n\n\n    _socket.emit('join', { roomId: channelId, name: getUserName() });\n  };\n\n  /**\r\n      * Disconnect from message server.\r\n      */\n  this.disconnect = function () {\n    if (_socket) {\n      _socket.disconnect();\n      //_socket.close();\n      _socket = null;\n      _channels = {};\n      _myID = null;\n    }\n  };\n\n\n  /**\r\n      * Send a message of a specific type, containing given data object to a channel.\r\n      * Subscription (listening) to that channel is not required.\r\n      */\n  this.sendMessage = function (type, data, channelId) {\n\n    var evt = { type: type, from: _myID, msg: data, roomId: channelId };\n\n    _socket.emit(\"message\", evt);\n  };\n\n  /**\r\n      * Send a message object to an individual user.\r\n      */\n  this.sendPrivateMessage = function (targetId, msg) {\n\n    var evt = { type: \"private\", target: targetId, from: _myID, msg: msg };\n\n    _socket.emit(\"message\", evt);\n  };\n\n  /**\r\n      * A convenience wrapper of sendMessage to send a simple text chat message to a channel.\r\n      */\n  this.sendChatMessage = function (msg, channelId) {\n\n    var evt = { type: \"txt\", from: _myID, msg: msg, roomId: channelId };\n\n    _socket.emit(\"message\", evt);\n\n    //This is done to handle /nick commands\n    onRecv(evt);\n  };\n\n  /**\r\n      * Returns the user info object for a given user on a specific channel.\r\n      * User lists are maintained per channel.\r\n      */\n  this.getUserById = function (id, channelId) {\n    var users = _channels[channelId].users;\n    for (var i = 0; i < users.length; i++) {\n      if (users[i].id == id)\n      return users[i];\n    }\n    return null;\n  };\n\n  /**\r\n      * Returns the local user's (randomly assigned) connection ID. Can be used to\r\n      * maintain hashmaps of users, since it's unique per server.\r\n      */\n  this.getLocalId = function () {return _myID;};\n\n  /**\r\n                                                  * Returns a channel's info object.\r\n                                                  */\n  this.getChannelInfo = function (channelId) {return _channels[channelId];};\n\n  this.isConnected = function () {return _socket;};\n};\n\nMessageClient.prototype.constructor = MessageClient;\nEventDispatcher.prototype.apply(MessageClient.prototype);\n\nvar _activeClients = {};\n\nMessageClient.GetInstance = function (serverUrls, path) {\n\n  if (!serverUrls)\n  serverUrls = EnvironmentConfigurations[getEnv()].LMV.RTC;\n\n  if (!Array.isArray(serverUrls))\n  serverUrls = [serverUrls];\n\n  var mc = _activeClients[serverUrls[0]];\n  if (mc)\n  return mc;\n\n  mc = new MessageClient(serverUrls, path);\n  _activeClients[serverUrls[0]] = mc;\n  return mc;\n};","function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}import { getScript, getResourceUrl as _getResourceUrl } from './globals';\nimport { getGlobal } from './compat';\n\nvar _window = getGlobal();\nvar _document = _window.document;\n\n// Class for loading external resources, such as scripts and stylesheets\nvar ResourceLoader = /*#__PURE__*/function () {\n  function ResourceLoader() {_classCallCheck(this, ResourceLoader);\n    // Contains one promise for each requested resource\n    this.loadPromises = {};\n  }\n\n  /**\n     * Returns the full url of a resource with version.\n     * The version will be determined from the LMV_VIEWER_VERSION variable.\n     * @private\n     * @param {string} url\n     * @returns {string} The full resource path.\n     */_createClass(ResourceLoader, [{ key: \"getResourceUrl\", value: function getResourceUrl(\n    url) {\n      return url.indexOf('://') > 0 ? url : _getResourceUrl(url);\n    }\n\n    /**\n       * Load the es6 promise library\n       * @param {*} onSuccess \n       * @param {*} onError \n       */ }, { key: \"loadPromiseLibrary\", value: function loadPromiseLibrary(\n    onSuccess, onError) {\n      if (_window['Promise'] !== undefined) {\n        onSuccess();\n        return;\n      }\n\n      var url = this.getResourceUrl('es6-promise.min.js');\n\n      this.loadScriptIntoDom(url, onSuccess, onError);\n    }\n\n    /**\n       * Load a script into the DOM\n       * @param {string} url - relative or absolute url\n       * @param {string} [libNamespace] - window property name expected to be loaded after library is downloaded. Can be undefined, too\n       * @param {function} onSuccess - called when the script is loaded into the DOM\n       * @param {function} [onError] - called when an error occurs\n       */ }, { key: \"loadScriptIntoDom\", value: function loadScriptIntoDom(\n    url, onSuccess, onError) {\n      var s = _document.createElement('SCRIPT');\n      s.src = url;\n\n      var clearCallbacks = function clearCallbacks() {\n        s.onerror = null;\n        s.onload = null;\n      };\n      var errCallback = function errCallback(err) {\n        clearCallbacks();\n        onError && onError(new Error(\"Error loading script \".concat(url, \", with error \").concat(err)));\n      };\n      var successCallback = function successCallback() {\n        clearCallbacks();\n        onSuccess();\n      };\n\n      s.onload = successCallback;\n      s.onerror = errCallback;\n\n      _document.head.appendChild(s);\n    }\n\n    /**\n       *\n       * @param {string} url - relative or absolute url\n       * @param {string} libNamespace - window property name expected to be loaded after library is downloaded. Can be undefined, too\n       * @returns {Promise} - of successful load\n       */ }, { key: \"loadScript\", value: function loadScript(\n    url, libNamespace) {var _this = this;\n      // library namespace already present, indicates already loaded\n      if (libNamespace && _window[libNamespace] !== undefined) {\n        return Promise.resolve();\n      }\n\n      url = this.getResourceUrl(url);\n      var key = url.toLowerCase();\n      if (key in this.loadPromises) {\n        return this.loadPromises[key];\n      }\n\n      var script = getScript(url);\n      if (script) {\n        // already downloaded, resolve immediately\n        this.loadPromises[key] = Promise.resolve();\n      } else {\n        // load the resource\n        this.loadPromises[key] = new Promise(function (resolve, reject) {\n          _this.loadScriptIntoDom(url, resolve, reject);\n        });\n      }\n\n      return this.loadPromises[key];\n    }\n\n    /**\n       *\n       * @param {string} url - relative or absolute url\n       * @returns {Promise} - of successful load\n       */ }, { key: \"loadCSS\", value: function loadCSS(\n    url) {\n      url = this.getResourceUrl(url);\n\n      var key = url.toLowerCase();\n      if (url in this.loadPromises) {\n        return this.loadPromises[key];\n      }\n\n      var css = this._getLink(url);\n      if (css) {\n        // already downloaded, resolve immediately\n        this.loadPromises[key] = Promise.resolve();\n      } else {\n        // download it\n        this.loadPromises[key] = new Promise(function (resolve, reject) {\n          var s = _document.createElement('link');\n          s.setAttribute('rel', 'stylesheet');\n          s.setAttribute('type', 'text/css');\n          s.setAttribute('href', href);\n\n          s.onload = resolve;\n          s.onerror = reject;\n\n          _document.head.appendChild(s);\n        });\n      }\n\n      return this.loadPromises[key];\n    }\n\n    /**\n       *\n       * @param {string} - valid url\n       * @private\n       */ }, { key: \"_getLink\", value: function _getLink(\n    url) {\n      var results = _document.getElementsByTagName('link');\n      for (var i = 0, len = results.length; i < len; i++) {\n        if (results[i].href === url) {\n          // Already downloaded\n          return results[i];\n        }\n      }\n      return null;\n    } }]);return ResourceLoader;}();\n\n\n// export an immutable singleton\nexport var theResourceLoader = new ResourceLoader();\nObject.freeze(theResourceLoader);\n\n\n// For backwards compatibility, keep exporting avp.loadDependency()\n// TODO: Remove in v8.0.0\nexport function loadDependency(libNamespace, libNameOrUrl, callback, onError /*,amdName*/) {\n  theResourceLoader.loadScript(libNameOrUrl, libNamespace).\n  then(function () {\n    callback && callback();\n  }).\n  catch(function (err) {\n    onError && onError(err);\n  });\n}","function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}import ModelPartsSearchProvider from './providers/ModelPartsSearchProvider';\nimport PropertiesSearchProvider from './providers/PropertiesSearchProvider';\nimport TextSearchProvider from './providers/TextSearchProvider';\n\nexport var SearchManager = /*#__PURE__*/function () {\n  function SearchManager(viewer) {_classCallCheck(this, SearchManager);\n    this.viewer = viewer;\n    this.searchProviders = new Map();\n  }\n\n  /**\n     * Add Search Provider Class to list of providers within SearchManager \n     * @param {SearchProvider} searchProvider \n     */_createClass(SearchManager, [{ key: \"addSearchProvider\", value: function addSearchProvider(\n    SearchProvider) {\n      if (!this.searchProviders.has(SearchProvider)) {\n        this.searchProviders.set(\n        SearchProvider, new SearchProvider(this.viewer));\n\n      }\n    } }, { key: \"search\",\n\n    /**\n                           * Performs search in search providers\n                           * @param {string} userInput - search query input from user.\n                           * @returns {Promise} Function returns a Promise with array of results from providers.\n                           */value: function search(\n    userInput) {var _this = this;\n      return new Promise(function (resolve, reject) {\n        var searchQuery = _this.prepareSearchInput(userInput);\n        var promises = [];\n\n        _this.searchProviders.forEach(function (searchProvider) {\n          var promise = searchProvider.search(searchQuery);\n          var searchProviderId = searchProvider.getProviderId();\n          promise.id = searchProviderId;\n          promises.push(promise);\n        });\n\n        Promise.all(promises).then(function (results) {\n          var res = {};\n\n          results.forEach(function (result, index) {\n            var currentId = promises[index].id;\n            res[currentId] = result;\n          });\n          resolve(res);\n        }).\n        catch(reject);\n\n      });\n    } }, { key: \"removeAllProviders\",\n\n    /**\n                                       * Remove search providers\n                                       */value: function removeAllProviders()\n    {\n      this.searchProviders.clear();\n    } }, { key: \"removeProvider\",\n\n    /**\n                                   * Remove specific search provider\n                                   */value: function removeProvider(\n    SearchProvider) {\n      this.searchProviders.delete(SearchProvider);\n    } }, { key: \"prepareSearchInput\",\n\n    /**\n                                       * Basic string handling.\n                                       * @param {string} searchQuery - search query input\n                                       */value: function prepareSearchInput(\n    searchQuery) {\n      return searchQuery.toLowerCase();\n    } }]);return SearchManager;}();\n\n\nvar namespace = AutodeskNamespace('Autodesk.Viewing.Search');\nnamespace.SearchManager = SearchManager;\nnamespace.ModelPartsSearchProvider = ModelPartsSearchProvider;\nnamespace.PropertiesSearchProvider = PropertiesSearchProvider;\nnamespace.TextSearchProvider = TextSearchProvider;","function _typeof(obj) {\"@babel/helpers - typeof\";if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {_typeof = function _typeof(obj) {return typeof obj;};} else {_typeof = function _typeof(obj) {return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;};}return _typeof(obj);}function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}function _inherits(subClass, superClass) {if (typeof superClass !== \"function\" && superClass !== null) {throw new TypeError(\"Super expression must either be null or a function\");}subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } });if (superClass) _setPrototypeOf(subClass, superClass);}function _setPrototypeOf(o, p) {_setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {o.__proto__ = p;return o;};return _setPrototypeOf(o, p);}function _createSuper(Derived) {var hasNativeReflectConstruct = _isNativeReflectConstruct();return function _createSuperInternal() {var Super = _getPrototypeOf(Derived),result;if (hasNativeReflectConstruct) {var NewTarget = _getPrototypeOf(this).constructor;result = Reflect.construct(Super, arguments, NewTarget);} else {result = Super.apply(this, arguments);}return _possibleConstructorReturn(this, result);};}function _possibleConstructorReturn(self, call) {if (call && (_typeof(call) === \"object\" || typeof call === \"function\")) {return call;}return _assertThisInitialized(self);}function _assertThisInitialized(self) {if (self === void 0) {throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");}return self;}function _isNativeReflectConstruct() {if (typeof Reflect === \"undefined\" || !Reflect.construct) return false;if (Reflect.construct.sham) return false;if (typeof Proxy === \"function\") return true;try {Date.prototype.toString.call(Reflect.construct(Date, [], function () {}));return true;} catch (e) {return false;}}function _getPrototypeOf(o) {_getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {return o.__proto__ || Object.getPrototypeOf(o);};return _getPrototypeOf(o);}import SearchProviderInterface from './SearchProviderInterface';var\n\nModelPartsSearchProvider = /*#__PURE__*/function (_SearchProviderInterf) {_inherits(ModelPartsSearchProvider, _SearchProviderInterf);var _super = _createSuper(ModelPartsSearchProvider);\n  function ModelPartsSearchProvider(viewer) {_classCallCheck(this, ModelPartsSearchProvider);return _super.call(this,\n    viewer);\n  }\n\n  /**\n     * Function returns result that contains filtered by search query list of dbIds\n     * @param {string} searchQuery - search query for model browser\n     * @returns {Promise} Promise with array of dbIds for each model.\n     */_createClass(ModelPartsSearchProvider, [{ key: \"search\", value: function search(\n    searchQuery) {var _this = this;\n      return new Promise(function (resolve, reject) {\n        var models = _this.viewer.getVisibleModels();\n        var result = [];\n\n        if (models.length === 0)\n        resolve(result);var _loop = function _loop(\n\n        i) {\n          var model = models[i];\n          var ids = [];\n          var tree = model.getInstanceTree();\n\n          model.getObjectTree(function (obj) {\n            obj.enumNodeChildren(obj.getRootId(), function (dbId) {\n              var idName = tree && tree.getNodeName(dbId);\n              if (idName && idName.toLowerCase().indexOf(searchQuery) !== -1) {\n                ids.push(dbId);\n              }\n            }, true);\n          });\n          result.push({ ids: ids, model: model });};for (var i = 0; i < models.length; i++) {_loop(i);\n        }\n        resolve(result);\n      });\n    } }, { key: \"getProviderId\",\n\n    /**\n                                  * @returns {string} Name of Search Provider\n                                  */value: function getProviderId()\n    {\n      return 'ModelPartsSearchProvider';\n    } }]);return ModelPartsSearchProvider;}(SearchProviderInterface);export { ModelPartsSearchProvider as default };\n;","function _typeof(obj) {\"@babel/helpers - typeof\";if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {_typeof = function _typeof(obj) {return typeof obj;};} else {_typeof = function _typeof(obj) {return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;};}return _typeof(obj);}function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}function _inherits(subClass, superClass) {if (typeof superClass !== \"function\" && superClass !== null) {throw new TypeError(\"Super expression must either be null or a function\");}subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } });if (superClass) _setPrototypeOf(subClass, superClass);}function _setPrototypeOf(o, p) {_setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {o.__proto__ = p;return o;};return _setPrototypeOf(o, p);}function _createSuper(Derived) {var hasNativeReflectConstruct = _isNativeReflectConstruct();return function _createSuperInternal() {var Super = _getPrototypeOf(Derived),result;if (hasNativeReflectConstruct) {var NewTarget = _getPrototypeOf(this).constructor;result = Reflect.construct(Super, arguments, NewTarget);} else {result = Super.apply(this, arguments);}return _possibleConstructorReturn(this, result);};}function _possibleConstructorReturn(self, call) {if (call && (_typeof(call) === \"object\" || typeof call === \"function\")) {return call;}return _assertThisInitialized(self);}function _assertThisInitialized(self) {if (self === void 0) {throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");}return self;}function _isNativeReflectConstruct() {if (typeof Reflect === \"undefined\" || !Reflect.construct) return false;if (Reflect.construct.sham) return false;if (typeof Proxy === \"function\") return true;try {Date.prototype.toString.call(Reflect.construct(Date, [], function () {}));return true;} catch (e) {return false;}}function _getPrototypeOf(o) {_getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {return o.__proto__ || Object.getPrototypeOf(o);};return _getPrototypeOf(o);}import SearchProviderInterface from './SearchProviderInterface';var\n\nPropertiesSearchProvider = /*#__PURE__*/function (_SearchProviderInterf) {_inherits(PropertiesSearchProvider, _SearchProviderInterf);var _super = _createSuper(PropertiesSearchProvider);\n  function PropertiesSearchProvider(viewer) {_classCallCheck(this, PropertiesSearchProvider);return _super.call(this,\n    viewer);\n  }\n\n  /**\n     * Async function that returns a list of properties by searchQuery\n     * @param {string} searchQuery - search query for model properties\n     * @returns {Promise} Promise with array of dbIds for each model.\n     */_createClass(PropertiesSearchProvider, [{ key: \"search\", value: function search(\n    searchQuery) {var _this = this;\n      return new Promise(function (resolve, reject) {\n        var models = _this.viewer.getVisibleModels();\n        var result = [];\n\n        if (models.length === 0)\n        resolve(result);var _loop = function _loop(\n\n        i) {\n          var model = models[i];\n          model.search(searchQuery,\n          // onLoadCallback\n          function (ids) {\n            result.push({ ids: ids, model: model });\n            if (result.length === models.length)\n            resolve(result);\n          },\n          // onErrorCallback\n          reject);};for (var i = 0; i < models.length; i++) {_loop(i);\n\n        };\n      });\n    } }, { key: \"getProviderId\",\n\n    /**\n                                  * @returns {string} Name of Search Provider\n                                  */value: function getProviderId()\n    {\n      return 'PropertiesSearchProvider';\n    } }]);return PropertiesSearchProvider;}(SearchProviderInterface);export { PropertiesSearchProvider as default };\n;","function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}var SearchProviderInterface = /*#__PURE__*/function () {\n  function SearchProviderInterface(viewer) {_classCallCheck(this, SearchProviderInterface);\n    this.viewer = viewer;\n  }\n\n  /**\n     * Performs search in search providers\n     * @param {string} userInput - search query input from user\n     * @returns {Promise} Promise with array of dbIds for each model.\n     */_createClass(SearchProviderInterface, [{ key: \"search\", value: function search(\n    userInput) {\n      return new Promise(function (resolve, reject) {\n      });\n    }\n\n    /**\n       * @returns {string} Name of Search Provider\n       */ }, { key: \"getProviderId\", value: function getProviderId()\n    {\n      return 'Search Provider Id';\n    } }]);return SearchProviderInterface;}();export { SearchProviderInterface as default };","function _typeof(obj) {\"@babel/helpers - typeof\";if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {_typeof = function _typeof(obj) {return typeof obj;};} else {_typeof = function _typeof(obj) {return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;};}return _typeof(obj);}function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}function _inherits(subClass, superClass) {if (typeof superClass !== \"function\" && superClass !== null) {throw new TypeError(\"Super expression must either be null or a function\");}subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } });if (superClass) _setPrototypeOf(subClass, superClass);}function _setPrototypeOf(o, p) {_setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {o.__proto__ = p;return o;};return _setPrototypeOf(o, p);}function _createSuper(Derived) {var hasNativeReflectConstruct = _isNativeReflectConstruct();return function _createSuperInternal() {var Super = _getPrototypeOf(Derived),result;if (hasNativeReflectConstruct) {var NewTarget = _getPrototypeOf(this).constructor;result = Reflect.construct(Super, arguments, NewTarget);} else {result = Super.apply(this, arguments);}return _possibleConstructorReturn(this, result);};}function _possibleConstructorReturn(self, call) {if (call && (_typeof(call) === \"object\" || typeof call === \"function\")) {return call;}return _assertThisInitialized(self);}function _assertThisInitialized(self) {if (self === void 0) {throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");}return self;}function _isNativeReflectConstruct() {if (typeof Reflect === \"undefined\" || !Reflect.construct) return false;if (Reflect.construct.sham) return false;if (typeof Proxy === \"function\") return true;try {Date.prototype.toString.call(Reflect.construct(Date, [], function () {}));return true;} catch (e) {return false;}}function _getPrototypeOf(o) {_getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {return o.__proto__ || Object.getPrototypeOf(o);};return _getPrototypeOf(o);}import SearchProviderInterface from \"./SearchProviderInterface\";var\n\nTextSearchProvider = /*#__PURE__*/function (_SearchProviderInterf) {_inherits(TextSearchProvider, _SearchProviderInterf);var _super = _createSuper(TextSearchProvider);\n  function TextSearchProvider(viewer) {var _this;_classCallCheck(this, TextSearchProvider);\n    _this = _super.call(this, viewer);\n    viewer.loadExtension('Autodesk.StringExtractor');return _this;\n  }_createClass(TextSearchProvider, [{ key: \"search\",\n\n    /**\n                                                       * Function returns result that contains filtered by search query list of strings\n                                                       * @param {string} searchQuery - search query for String search\n                                                       * @returns {Promise} Promise with array of strings for each model.\n                                                       */value: function search(\n    searchQuery) {var _this2 = this;\n      return new Promise(function (resolve) {\n        _this2.viewer.getExtensionAsync('Autodesk.StringExtractor').then(function (ext) {\n          return ext.getDocumentStrings().then(function (documentStrings) {\n            var result = [];\n\n            Object.keys(documentStrings).forEach(function (key) {\n              var extractedStrings = documentStrings[key].strings;\n              var searchResult = _this2.searchStrings(extractedStrings, searchQuery);\n              result.push({\n                modelId: key,\n                searchResult: searchResult });\n\n            });\n            resolve(result);\n          });\n        });\n      });\n    } }, { key: \"searchStrings\",\n\n    /**\n                                  * Functions performs search on a given data by filtering with searchQuery\n                                  * @param {*} data data to search in\n                                  * @param {*} searchQuery filtering string from user's input\n                                  */value: function searchStrings(\n    data, searchQuery) {\n      var searchResult = [];\n      for (var i = 0; i < data.length; i++) {\n        if (data[i].string.toLowerCase().indexOf(searchQuery) !== -1) {\n          searchResult.push(data[i]);\n        }\n      }\n      return searchResult;\n    } }, { key: \"getProviderId\",\n\n    /**\n                                  * @returns {string} Name of Search Provider\n                                  */value: function getProviderId()\n    {\n      return 'TextSearchProvider';\n    } }]);return TextSearchProvider;}(SearchProviderInterface);export { TextSearchProvider as default };\n;","import * as THREE from \"three\";\n\n//\n// This object handles the default click behaviour, some of which is controlled\n// via the \"setClickBehavior\" configuration.\n//\nexport function DefaultHandler(viewerImpl, navapi, utilities)\n{\n  this.clickConfig = null;\n\n  this.getNames = function ()\n  {\n    return [\"default\"];\n  };\n\n  this.getName = function ()\n  {\n    return this.getNames()[0];\n  };\n\n  this.setClickBehavior = function (config)\n  {\n    this.clickConfig = config;\n  };\n\n  this.getClickBehavior = function ()\n  {\n    return this.clickConfig;\n  };\n\n  this.activate = function (name) {};\n  this.deactivate = function (name) {};\n\n  this.handleAction = function (actionArray, rayData)\n  {\n    for (var i = 0; i < actionArray.length; ++i) {\n      switch (actionArray[i]) {\n        case \"selectOnly\":\n          if (viewerImpl.selector) {\n            if (rayData) {\n              viewerImpl.selector.setSelection([rayData.dbId], rayData.model);\n            }\n          }\n          break;\n        case \"deselectAll\":\n          if (viewerImpl.selector) {\n            viewerImpl.selector.setSelection([]);\n          }\n          break;\n        case \"selectToggle\":\n          if (viewerImpl.selector) {\n            if (rayData) {\n              viewerImpl.selector.toggleSelection(rayData.dbId, rayData.model);\n            }\n          }\n          break;\n        case \"isolate\":\n          if (rayData) {\n            viewerImpl.isolate(rayData.dbId);\n          }\n          break;\n        case \"showAll\":\n          viewerImpl.showAll();\n          break;\n        case \"setCOI\":\n          if (rayData && rayData.intersectPoint) {\n            utilities.setPivotPoint(rayData.intersectPoint, true, true);\n            utilities.pivotActive(true, true);\n          }\n          break;\n        case \"hide\":\n          if (rayData) {\n            viewerImpl.hide(rayData.dbId);\n          }\n          break;\n        case \"show\":\n          if (rayData) {\n            viewerImpl.show(rayData.dbId);\n          }\n          break;\n        case \"toggleVisibility\":\n          if (rayData) {\n            viewerImpl.toggleVisibility(rayData.dbId);\n          }\n          break;\n        case \"focus\":\n          // As a side effect of focus we also select\n          if (viewerImpl.selector) {\n            if (rayData) {\n              viewerImpl.selector.setSelection([rayData.dbId], rayData.model);\n            } else {\n              viewerImpl.selector.setSelection([]);\n            }\n            utilities.fitToView();\n          }\n          break;}\n\n    }\n  };\n\n  this.handleSingleClick = function (event, button)\n  {\n    var control = event.ctrlKey || event.metaKey;\n    var shift = event.shiftKey;\n    var alt = event.altKey;\n\n    if (button === 0) {\n      var vpVec = viewerImpl.clientToViewport(event.canvasX, event.canvasY);\n      var result = viewerImpl.hitTestViewport(vpVec, false);\n      var key = \"click\";\n\n      if (control) key += \"Ctrl\";\n      if (shift) key += \"Shift\";\n      if (alt) key += \"Alt\";\n\n      var objectKey = result ? \"onObject\" : \"offObject\";\n\n      if (this.clickConfig && this.clickConfig[key] && this.clickConfig[key][objectKey]) {\n        this.handleAction(this.clickConfig[key][objectKey], result);\n        return true;\n      }\n    } else\n    if (button === 1 && shift && !alt && !control) {\n      var vpVec = viewerImpl.clientToViewport(event.canvasX, event.canvasY);\n      var result = viewerImpl.hitTestViewport(vpVec, false);\n      if (result && result.intersectPoint)\n      {\n        utilities.setPivotPoint(result.intersectPoint, true, true);\n        utilities.pivotActive(true, true);\n        return true;\n      }\n    }\n    return false;\n  };\n\n  this.handleDoubleClick = function (event, button)\n  {\n    if (viewerImpl.selector && button === 0)\n    {\n      var vpVec = viewerImpl.clientToViewport(event.canvasX, event.canvasY);\n      var result = viewerImpl.hitTestViewport(vpVec, false);\n      if (result) {\n        viewerImpl.selector.setSelection([result.dbId], result.model);\n      } else\n      {\n        viewerImpl.selector.clearSelection();\n      }\n      utilities.fitToView();\n      return true;\n    }\n    if (button === 1)\n    {\n      navapi.fitBounds(false, utilities.getBoundingBox(true));\n      navapi.setPivotSetFlag(false);\n      return true;\n    }\n    return false;\n  };\n\n  this.handleSingleTap = function (event)\n  {\n    event.clientX = event.pointers[0].clientX;\n    event.clientY = event.pointers[0].clientY;\n    viewerImpl.api.triggerSingleTapCallback(event);\n\n    if (event.hasOwnProperty(\"pointers\") && event.pointers.length === 2)\n    {\n      navapi.setRequestHomeView(true);\n      return true;\n    }\n    if (viewerImpl.selector)\n    {\n      var vpVec = viewerImpl.clientToViewport(event.canvasX, event.canvasY);\n      var result = viewerImpl.hitTestViewport(vpVec, false);\n\n      if (result) {\n        viewerImpl.selector.setSelection([result.dbId], result.model);\n        viewerImpl.api.triggerSelectionChanged([result.dbId]);\n      } else\n      {\n        viewerImpl.selector.clearSelection();\n        viewerImpl.api.triggerSelectionChanged(null);\n      }\n      return true;\n    }\n    return false;\n  };\n\n  this.handleDoubleTap = function (event)\n  {\n    event.clientX = event.pointers[0].clientX;\n    event.clientY = event.pointers[0].clientY;\n    viewerImpl.api.triggerDoubleTapCallback(event);\n\n    var result = this.handleSingleTap(event, 0);\n    utilities.fitToView();\n    return result;\n  };\n\n  this.handlePressHold = function (event)\n  {\n    if (event.type === \"press\")\n    {\n      event.clientX = event.pointers[0].clientX;\n      event.clientY = event.pointers[0].clientY;\n\n      return viewerImpl.api.triggerContextMenu(event);\n    }\n    return false;\n  };\n\n  this.handleGesture = function (event)\n  {\n    if (event.type.includes(\"swipe\"))\n    {\n      event.clientX = event.pointers[0].clientX;\n      event.clientY = event.pointers[0].clientY;\n\n      return viewerImpl.api.triggerSwipeCallback(event);\n    }\n    return false;\n  };\n}","\nimport * as THREE from \"three\";\n\nexport function FovTool(viewerApi)\n{\n  var kScreenEpsilon = 0.001;\n  var kEpsilon = 0.00001;\n  var kFovDragScale = -1.0;\n  var kDampingFactor = 0.6;\n  var kWheelThresholdMs = 100;\n\n  var _navapi = viewerApi.navigation;\n  var _camera = _navapi.getCamera();\n  var _names = [\"fov\"];\n\n  var _interactionActive = false;\n\n  var _wheelAccum = 0;\n  var _wheelOldest = null;\n  var _wheelNewest = null;\n  var _wheelContinuous = false;\n\n  var _mouseButtons = 0; // Track mouse buttons that are held\n\n  // Interaction Triggers:\n  var kNone = -5;\n  var kWheel = -1;\n  var kMouseLeft = 0;\n  var kMouseMiddle = 1;\n  var kMouseRight = 2;\n\n  var _activeTrigger = kNone;\n  var _startXYZ = new THREE.Vector3();\n  var _moveXYZ = new THREE.Vector3();\n  var _motionDelta = new THREE.Vector3();\n  var _touchType = null;\n\n  this.getNames = function ()\n  {\n    return _names;\n  };\n\n  this.getName = function ()\n  {\n    return _names[0];\n  };\n\n  this.activate = function (name)\n  {\n    _mouseButtons = 0;\n  };\n\n  this.deactivate = function (name)\n  {\n    _activeTrigger = kNone;\n  };\n\n  this.getCursor = function ()\n  {\n    return _mouseButtons !== 0 && _activeTrigger === kNone ? null : 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auto\";\n  };\n\n  this.getMotionDelta = function (dxyz)\n  {\n    var deltaX = _moveXYZ.x - _startXYZ.x;\n    var deltaY = _moveXYZ.y - _startXYZ.y;\n    var deltaZ = _moveXYZ.z - _startXYZ.z;\n\n    if (Math.abs(deltaX) < kScreenEpsilon) deltaX = 0.0;\n    if (Math.abs(deltaY) < kScreenEpsilon) deltaY = 0.0;\n    if (Math.abs(deltaZ) < kScreenEpsilon) deltaZ = 0.0;\n\n    dxyz.set(deltaX, deltaY, deltaZ);\n  };\n\n  this.stepMotionDelta = function (delta, damped)\n  {\n    if (damped)\n    {\n      _startXYZ.x += delta.x * kDampingFactor;\n      _startXYZ.y += delta.y * kDampingFactor;\n      _startXYZ.z += delta.z * kDampingFactor;\n    } else\n\n    _startXYZ.copy(_moveXYZ);\n  };\n\n  function promoteDelta(delta)\n  {\n    // promote a wheel delta to a full wheel stop (3)\n    if (delta < 0 && delta > -3) {\n      return -3;\n    }\n    return delta > 0 && delta < 3 ? 3 : delta;\n  }\n\n  this.getAccumulatedWheelDelta = function ()\n  {\n    var now = Date.now();\n    var delta = 0;\n\n    if (_wheelNewest && now - _wheelNewest > kWheelThresholdMs) {\n      // Newest event in accumulator has aged out; assume wheel motion has stopped.\n      delta = promoteDelta(_wheelAccum);\n      _wheelAccum = 0;\n      _wheelOldest = null;\n      _wheelNewest = null;\n      _wheelContinuous = false;\n    } else\n    if (_wheelOldest && now - _wheelOldest > kWheelThresholdMs) {\n      // Oldest event in accumulator has aged out; process continuously.\n      if (_wheelContinuous) {\n        if (Math.abs(_wheelAccum) >= 3) {\n          delta = _wheelAccum;\n          _wheelAccum = 0;\n        }\n      } else {\n        delta = promoteDelta(_wheelAccum);\n        _wheelContinuous = true;\n        _wheelAccum = 0;\n      }\n    }\n    return delta;\n  };\n\n  this.update = function ()\n  {\n    var wheelEnded = false;\n    var updatePivot = _activeTrigger > kNone;\n\n    if (_activeTrigger > kNone)\n    {\n      this.controller.setIsLocked(true);\n      this.getMotionDelta(_motionDelta);\n\n      var deltaX = _motionDelta.x;\n      var deltaY = _motionDelta.y;\n      var deltaZ = _motionDelta.z;\n\n      if (deltaX !== 0.0 || deltaY !== 0.0 || deltaZ !== 0.0)\n      {\n        updatePivot = true;\n        if (_activeTrigger >= kMouseLeft)\n        {\n          // Map XY movement to Z:\n          deltaY = -deltaY; // Invert Y\n          deltaZ = Math.abs(deltaX) > Math.abs(deltaY) ? deltaX : deltaY;\n          if (deltaZ !== 0.0)\n          {\n            deltaZ *= kFovDragScale;\n            _navapi.setVerticalFov(_navapi.getVerticalFov() * (1.0 + deltaZ), true);\n          }\n        } else\n\n        {\n          // Translate wheelAccum backwards to determine the number of wheel stops.\n          var deltaFocalLength = this.getAccumulatedWheelDelta() / 3;\n          if (deltaFocalLength !== 0.0)\n          _navapi.setFocalLength(_navapi.getFocalLength() + deltaFocalLength, true);\n        }\n      }\n      this.stepMotionDelta(_motionDelta, true);\n\n      // If a wheel event triggered this we've now handled it,\n      if (_activeTrigger === kWheel && Math.abs(deltaZ) < kEpsilon)\n      {\n        this.interactionEnd(kWheel);\n        wheelEnded = true;\n      }\n    }\n\n    if (updatePivot)\n    this.utilities.pivotActive(_navapi.getPivotSetFlag(), true);else\n\n    this.utilities.pivotUpdate();\n\n    // If the interaction has \"ended\" we can now forget the trigger.\n    if (!_interactionActive && (wheelEnded || _activeTrigger > kNone))\n    {\n      if (_activeTrigger > kWheel)\n      {\n        // Kill any ongoing damped motion if we aren't using\n        // the wheel.\n        _startXYZ.copy(_moveXYZ);\n      }\n      _activeTrigger = kNone;\n      this.controller.setIsLocked(false);\n    }\n    return _camera.dirty;\n  };\n\n  this.interactionStart = function (trigger, force)\n  {\n    // Just a simple way to give device input a sort of priority \n    // so we don't have to track all active triggers. Just remember\n    // the most recent with highest \"priority\".\n    if (force || trigger > _activeTrigger)\n    {\n      // Perhaps we need to remember the modifier keys now.\n      _activeTrigger = trigger;\n      _interactionActive = true;\n    }\n\n    // Switch to perspective\n    _navapi.toPerspective();\n  };\n\n  this.interactionEnd = function (trigger)\n  {\n    if (trigger === _activeTrigger)\n    {\n      if (trigger !== kWheel)\n      this.utilities.pivotActive(false);\n\n      // We have to leave the _activeTrigger set until the\n      // next update occurs so the update will apply the correct\n      // operation.\n      _interactionActive = false;\n    }\n  };\n\n  // ------------------------\n  // Event handler callbacks:\n  // These can use \"this\".\n\n\n  this.handleWheelInput = function (delta)\n  {\n    if (_activeTrigger > kWheel)\n    return false;\n\n    // Match original reverse behaviour:\n    if (_navapi.getReverseZoomDirection())\n    delta *= -1;\n\n    _moveXYZ.z += delta;\n    _wheelAccum += delta;\n    var now = Date.now();\n    if (!_wheelOldest) {\n      _wheelOldest = now;\n    }\n    _wheelNewest = now;\n\n    if (delta != 0.0)\n    this.interactionStart(kWheel);\n\n    return true;\n  };\n\n  this.handleGesture = function (event)\n  {\n    switch (event.type) {\n\n      case \"dragstart\":\n        return this.handleButtonDown(event, 0);\n\n      case \"dragmove\":\n        return this.handleMouseMove(event);\n\n      case \"dragend\":\n        return this.handleButtonUp(event, 0);\n\n      case \"drag3start\":\n        _touchType = \"drag\";\n        // Fake the mouse for now. Coord should be centroid.\n        return this.handleButtonDown(event, 0);\n\n      case \"drag3move\":\n        return _touchType === \"drag\" ? this.handleMouseMove(event) : false;\n\n      case \"drag3end\":\n        if (_touchType === \"drag\")\n        this.handleButtonUp(event, 0);\n\n        _touchType = null;\n        // Sigh... minor hack\n        // Can't consume the end event because the hot gesture\n        // tool needs to see it to end the interaction.\n        return false;}\n\n    return false;\n  };\n\n\n  this.handleButtonDown = function (event, button)\n  {\n    _mouseButtons += 1 << button;\n\n    if (button !== kMouseRight) {\n      _startXYZ.x = (event.normalizedX + 1.0) * 0.5;\n      _startXYZ.y = 1.0 - (event.normalizedY + 1.0) * 0.5;\n\n      _moveXYZ.copy(_startXYZ);\n\n      this.interactionStart(button);\n      return true;\n    }\n\n    return false;\n  };\n\n  this.handleButtonUp = function (event, button)\n  {\n    _mouseButtons -= 1 << button;\n\n    if (button !== kMouseRight) {\n      _moveXYZ.x = (event.normalizedX + 1.0) * 0.5;\n      _moveXYZ.y = 1.0 - (event.normalizedY + 1.0) * 0.5;\n\n      this.interactionEnd(button);\n      return true;\n    }\n\n    return false;\n  };\n\n  this.handleMouseMove = function (event)\n  {\n    _moveXYZ.x = (event.normalizedX + 1.0) * 0.5;\n    _moveXYZ.y = 1.0 - (event.normalizedY + 1.0) * 0.5;\n    return _activeTrigger > kWheel;\n  };\n\n  this.handleBlur = function (event)\n  {\n    // Reset things when we lose focus...\n    this.interactionEnd(_activeTrigger);\n    return false;\n  };\n\n};","\nimport { isTouchDevice, isIE11, isNodeJS } from \"../compat\";\n\n//Hammer cannot be included in a node.js context....\nvar Hammer;\nif (!isNodeJS()) {\n  //Hammer does not work on Node because it references window and document\n  Hammer = require('../../thirdparty/hammer/hammer.js');\n}\n\n//Delay initialization so we can skip it on the server.\nexport var GestureRecognizers = {};\n\nfunction initGesturesOnce() {\n  if (GestureRecognizers.singletap)\n  return;\n\n  var gr = GestureRecognizers;\n  gr.singletap = [Hammer.Tap, { event: 'singletap', threshold: 7.0, time: 400 }];\n  gr.singletap2 = [Hammer.Tap, { event: 'singletap2', pointers: 2, threshold: 7.0, time: 400 }];\n  gr.press = [Hammer.Press, { event: 'press', time: 500, threshold: 50.0 }];\n  gr.doubletap = [Hammer.Tap, { event: 'doubletap', taps: 2, interval: 300, threshold: 6, posThreshold: 30 }];\n  gr.doubletap2 = [Hammer.Tap, { event: 'doubletap2', pointers: 2, taps: 2, interval: 300, threshold: 6, posThreshold: 40 }];\n  gr.swipe = [Hammer.Swipe, { event: 'swipe', pointers: 1, threshold: 200, velocity: 1.7 }];\n  gr.drag = [Hammer.Pan, { event: 'drag', pointers: 1 }];\n  gr.drag3 = [Hammer.Pan, { event: 'drag3', pointers: 3, threshold: 15 }];\n  gr.pan = [Hammer.Pan, { event: 'pan', pointers: 2, threshold: 20 }];\n  gr.pinch = [Hammer.Pinch, { event: 'pinch', pointers: 2, enable: true, threshold: 0.05 }];\n  gr.rotate = [Hammer.Rotate, { event: 'rotate', pointers: 2, enable: true, threshold: 7.0 }];\n}\n\n// Initialize asap\nif (Hammer) {\n  initGesturesOnce();\n}\n\nexport function GestureHandler(viewerApi)\n{\n  var _navapi = viewerApi.navigation;\n  var _names = ['gestures'];\n  var _this = this;\n  var _mouseEnabled = true;\n  var _lock = false;\n  var _twoPointerSwipeEnabled = true;\n  var hammer = null;\n  var _isActive = false;\n\n  var isTouch = isTouchDevice();\n\n  _navapi.setIsTouchDevice(isTouch);\n\n\n  if (isTouch) {\n    hammer = new Hammer.Manager(viewerApi.canvasWrap, {\n      recognizers: [\n      GestureRecognizers.drag,\n      GestureRecognizers.doubletap,\n      GestureRecognizers.doubletap2,\n      GestureRecognizers.singletap,\n      GestureRecognizers.singletap2,\n      GestureRecognizers.press,\n      GestureRecognizers.drag3,\n      GestureRecognizers.swipe,\n\n      // Note: These recognizers are active only when _twoPointerSwipeEnabled is true\n      GestureRecognizers.pan,\n      GestureRecognizers.pinch,\n      GestureRecognizers.rotate],\n\n      handlePointerEventMouse: false,\n      inputClass: isIE11 ? Hammer.PointerEventInput : Hammer.TouchInput });\n\n    hammer.get('pinch').recognizeWith([hammer.get('drag')]);\n\n    viewerApi.canvasWrap.addEventListener('touchstart', this.onTouchStart, false);\n  }\n\n  this.onTouchStart = function (event) {\n\n    event.preventDefault();\n  };\n\n  this.getNames = function () {\n\n    return _names;\n  };\n\n  this.getName = function () {\n\n    return _names[0];\n  };\n\n  this.isActive = function () {\n\n    return _isActive;\n  };\n\n  this.__clientToCanvasCoords = function (event) {\n\n    var rect = viewerApi.impl.getCanvasBoundingClientRect();\n    var width = rect.width;\n    var height = rect.height;\n\n    // Canvas coordinates: relative to the canvas element.\n    // 0 = top left, +ve right and down.\n    //\n    var canvasX, canvasY;\n\n    if (event.hasOwnProperty('center')) {\n      canvasX = event.center.x - rect.left;\n      canvasY = event.center.y - rect.top;\n    } else {\n      canvasX = event.pointers[0].clientX - rect.left;\n      canvasY = event.pointers[0].clientY - rect.top;\n    }\n    event.canvasX = canvasX;\n    event.canvasY = canvasY;\n\n    // Normalized coordinates: [-1, +1].\n    // 0 = center, +ve = right and up.\n    //\n    event.normalizedX = canvasX / width * 2.0 - 1.0;\n    event.normalizedY = (height - canvasY) / height * 2.0 - 1.0;\n  };\n\n\n  this.distributeGesture = function (event) {\n\n    _this.__clientToCanvasCoords(event);\n\n    if (_this.controller.distributeEvent('handleGesture', event))\n    event.preventDefault();\n  };\n\n  this.onSingleTap = function (event) {\n\n    _this.__clientToCanvasCoords(event);\n\n    if (_this.controller.distributeEvent('handleSingleTap', event))\n    event.preventDefault();\n  };\n\n  this.onDoubleTap = function (event) {\n\n    _this.__clientToCanvasCoords(event);\n\n    if (_this.controller.distributeEvent('handleDoubleTap', event))\n    event.preventDefault();\n  };\n\n  this.onPressHold = function (event) {\n\n    _this.__clientToCanvasCoords(event);\n\n    if (_this.controller.distributeEvent('handlePressHold', event))\n    event.preventDefault();\n  };\n\n  // Hammer.js contains an event called hammer.input, which is emitted for\n  // every touch event. This contains information of when the user started touching,\n  // and when they ended. This provides a general mechanism when to disable mouse\n  // buttons. Touch interactions should have priority, and there's no use-case for\n  // handling mouse events while touch is being used.\n  // This prevents cases (most prominent in IE11 / Edge) where a mouse down is emitted\n  // while Hammer is still trying to determine what type of gesture was traced on screen.\n  this.onHammerInput = function (event) {\n\n    _this.setMouseDisabledWhenTouching(event);\n  };\n\n  this.setMouseDisabledWhenTouching = function (event) {\n    if (event.isFirst && !_lock) {\n      _mouseEnabled = _this.controller.enableMouseButtons(false);\n      _lock = true;\n    } else if (event.isFinal) {\n      setTimeout(function () {\n        _this.controller.enableMouseButtons(_mouseEnabled);\n        _lock = false;\n      }, 10);\n    }\n  };\n\n  this.activate = function (name) {\n\n    if (hammer && !_isActive)\n    {\n      hammer.on('dragstart dragmove dragend', this.distributeGesture);\n      hammer.on('singletap', this.onSingleTap);\n      hammer.on('singletap2', this.onSingleTap);\n      hammer.on('doubletap', this.onDoubleTap);\n      hammer.on('doubletap2', this.onDoubleTap);\n      hammer.on('press pressup', this.onPressHold);\n      hammer.on('drag3start drag3move drag3end', this.distributeGesture);\n      hammer.on('swipeleft swiperight swipeup swipedown', this.distributeGesture);\n\n      if (_twoPointerSwipeEnabled) {\n        hammer.on('panstart panmove panend', this.distributeGesture);\n        hammer.on('pinchstart pinchmove pinchend', this.distributeGesture);\n        hammer.on('rotatestart rotatemove rotateend', this.distributeGesture);\n      }\n\n      hammer.on('hammer.input', this.onHammerInput);\n\n      // we only want to trigger a tap, when we don't have detected a doubletap\n      hammer.get('doubletap2').recognizeWith('doubletap');\n      hammer.get('singletap2').recognizeWith('singletap');\n      hammer.get('singletap').requireFailure('doubletap');\n      hammer.get('swipe').recognizeWith('drag');\n    }\n\n    _isActive = true;\n  };\n\n  this.deactivate = function (name) {\n\n    if (hammer && _isActive)\n    {\n      hammer.off('dragstart dragmove dragend', this.distributeGesture);\n      hammer.off('singletap', this.onSingleTap);\n      hammer.off('singletap2', this.onSingleTap);\n      hammer.off('doubletap', this.onDoubleTap);\n      hammer.off('doubletap2', this.onDoubleTap);\n      hammer.off('press pressup', this.onPressHold);\n      hammer.off('drag3start drag3move drag3end', this.distributeGesture);\n      hammer.off('swipeleft swiperight swipeup swipedown', this.distributeGesture);\n\n      if (_twoPointerSwipeEnabled) {\n        hammer.off('panstart panmove panend', this.distributeGesture);\n        hammer.off('pinchstart pinchmove pinchend', this.distributeGesture);\n        hammer.off('rotatestart rotatemove rotateend', this.distributeGesture);\n      }\n\n      hammer.off('hammer.input', this.onHammerInput);\n    }\n\n    _isActive = false;\n  };\n\n\n  this.update = function () {\n\n    return false;\n  };\n\n\n  this.handleBlur = function (event) {\n\n    return false;\n  };\n\n  /**\n      * Disables two finger swipe functionality (pan, rotate, zoom) so that a\n      * mobile user can scroll the page where the viewer is being embedded.\n      */\n  this.disableTwoFingerSwipe = function () {\n\n    _twoPointerSwipeEnabled = false;\n    if (hammer) {\n      hammer.remove(Hammer.Pan);\n      hammer.remove(Hammer.Pinch);\n      hammer.remove(Hammer.Rotate);\n      hammer.off('panstart panmove panend', this.distributeGesture);\n      hammer.off('pinchstart pinchmove pinchend', this.distributeGesture);\n      hammer.off('rotatestart rotatemove rotateend', this.distributeGesture);\n    }\n  };\n\n  /**\n      * Change a gesture's parameter (such as threshold, time, velocity, etc) to allow customizing the experience\n      * according to the tool being used\n      * @param gestureName\n      * @param parameter - which gesture parameter to change\n      * @param value - the new parameter value\n      * @returns {boolean} - true if the gesture exists and could be changed\n      */\n  this.setGestureParameter = function (gestureName, parameter, value) {\n    var gesture = hammer && hammer.get(gestureName);\n\n    if (!gesture) return false;\n\n    gesture.options[parameter] = value;\n\n    return true;\n  };\n\n  /**\n      * Restore's a gesture's default value for a specified parameter\n      * @param gestureName\n      * @param parameter - which gesture parameter to change\n      * @returns {boolean} - true if the gesture exists and could be restored\n      */\n  this.restoreGestureParameterDefault = function (gestureName, parameter) {\n    var gesture = hammer && hammer.get(gestureName);\n\n    if (!gesture) return false;\n\n    var lmvDefaults = GestureRecognizers[gestureName][1];\n\n    gesture.options[parameter] = lmvDefaults.hasOwnProperty(parameter) ?\n    lmvDefaults[parameter] :\n    gesture.defaults[parameter];\n\n    return true;\n  };\n}","\nexport function HotGestureTool(viewerApi)\n{\n  var _names = [\"hottouch\"];\n\n  var _modifierState = { SHIFT: 0, ALT: 0, CONTROL: 0 };\n  var _setMode = null;\n  var _saveMode = null;\n  var _fovActive = false;\n  var _rollActive = false;\n  var _startEvent = null;\n\n  var _keys = {\n    SHIFT: 16,\n    CONTROL: 17,\n    ALT: 18,\n    ESCAPE: 27,\n    LCOMMAND: 91,\n    RCOMMAND: 93,\n    COMMANDMOZ: 224 };\n\n\n  var ORBIT = \"orbit\";\n  var ROLL = \"worldup\";\n  var FOV = \"fov\";\n\n  this.active = false;\n\n  this.getNames = function ()\n  {\n    return _names;\n  };\n\n  this.getName = function ()\n  {\n    return _names[0];\n  };\n\n  this.activate = function (name)\n  {\n    this.active = true;\n  };\n\n  this.deactivate = function (name)\n  {\n    this.active = false;\n  };\n\n  this.isActive = function () {\n    return this.active;\n  };\n\n  this.__checkStart = function ()\n  {\n    // Since the start event triggers the tool change we re-send the\n    // start event so that the new tool can trigger from it.\n    if (_startEvent)\n    {\n      this.controller.distributeEvent(\"handleGesture\", _startEvent);\n      _startEvent = null;\n    }\n  };\n\n  this.update = function ()\n  {\n    if (this.controller.getIsLocked())\n    return false;\n\n    var got = viewerApi.getActiveNavigationTool();\n    var wantRoll = _fovActive === false && _rollActive === true;\n    var wantFov = _fovActive === true && _rollActive === false;\n\n    if (wantRoll || wantFov)\n    {\n      var want = wantRoll ? ROLL : FOV;\n\n      if (got === want)\n      return false;\n\n      if (got === _setMode) // We set it we can change it\n        {\n          viewerApi.setActiveNavigationTool(want);\n          _setMode = want;\n          this.__checkStart();\n          return false;\n        }\n      _saveMode = got;\n      viewerApi.setActiveNavigationTool(want);\n      _setMode = want;\n      this.__checkStart();\n    } else\n    if (_setMode)\n    {\n      viewerApi.setActiveNavigationTool(_saveMode);\n      _setMode = null;\n      _saveMode = null;\n    }\n    return false;\n  };\n\n  this.resetKeys = function ()\n  {\n    // Clear modifier states:\n    _modifierState.SHIFT = 0;\n    _modifierState.CONTROL = 0;\n    _modifierState.ALT = 0;\n  };\n\n  this.updateModifierState = function (event)\n  {\n    _modifierState.CONTROL = event.ctrlKey ? 1 : 0;\n    _modifierState.SHIFT = event.shiftKey ? 1 : 0;\n    _modifierState.ALT = event.altKey ? 1 : 0;\n  };\n\n  this.handleGesture = function (event)\n  {\n    if (event === _startEvent)\n    return false;\n\n    switch (event.type) {\n\n      case \"drag3start\":\n        if (viewerApi.navigation.isActionEnabled('fov')) {\n          _startEvent = event;\n          _fovActive = true;\n        }\n        break;\n\n      case \"drag3move\":\n        break;\n\n      case \"drag3end\":\n        _fovActive = false;\n        break;\n\n      case \"rotatestart\":\n        if (viewerApi.navigation.isActionEnabled('roll')) {\n          _startEvent = event;\n          _rollActive = true;\n        }\n        break;\n\n      case \"rotatemove\":\n        break;\n\n      case \"rotateend\":\n        _rollActive = false;\n        break;}\n\n    return false;\n  };\n\n  this.handleKeyDown = function (event, keyCode)\n  {\n    this.updateModifierState(event);\n\n    switch (keyCode) {\n\n      // Do we need to consume these events?\n      case _keys.SHIFT:_modifierState.SHIFT = 1;break;\n      case _keys.CONTROL:_modifierState.CONTROL = 1;break;\n      case _keys.ALT:_modifierState.ALT = 1;break;}\n\n    return false;\n  };\n\n  this.handleKeyUp = function (event, keyCode)\n  {\n    this.updateModifierState(event);\n\n    switch (keyCode) {\n\n      // Do we need to consume these events?\n      case _keys.SHIFT:_modifierState.SHIFT = 0;break;\n      case _keys.CONTROL:_modifierState.CONTROL = 0;break;\n      case _keys.ALT:_modifierState.ALT = 0;break;}\n\n    return false;\n  };\n\n  this.handleButtonDown = function (event, button)\n  {\n    this.updateModifierState(event);\n    return false;\n  };\n\n  this.handleButtonUp = function (event, button)\n  {\n    this.updateModifierState(event);\n    return false;\n  };\n\n  this.handleMouseMove = function (event)\n  {\n    this.updateModifierState(event);\n    return false;\n  };\n\n  this.handleBlur = function (event)\n  {\n    // Reset things when we lose focus...\n    this.resetKeys();\n    return false;\n  };\n}","\nimport { KeyCode } from \"./KeyCode\";\n\n/**\n                                      * @callback Autodesk.Viewing.HotkeyManager~onHotkeyPressCallback\n                                      * @param {number[]} keycodes - The key combination that triggered this callback.\n                                      * @returns {boolean} True if the press event was handled, false otherwise.\n                                      */\n\n/**\n                                          * @callback Autodesk.Viewing.HotkeyManager~onHotkeyReleaseCallback\n                                          * @param {number[]} keycodes - The key combination that triggered this callback.\n                                          * @returns {boolean} True if the release event was handled, false otherwise.\n                                          */\n\n/**\n                                              * @typedef {Object} Autodesk.Viewing.HotkeyManager~Hotkey\n                                              * @property {number[]} keycodes - The keycode combination (order doesn't matter).\n                                              * @property {Autodesk.Viewing.HotkeyManager~onHotkeyPressCallback} [onPress] - The callback used when the combination is engaged.\n                                              * @property {Autodesk.Viewing.HotkeyManager~onHotkeyReleaseCallback} [onRelease] - The callback used when the combination is disengaged.\n                                              */\n\n/**\n                                                  * Management of hotkeys for the viewer.\n                                                  *\n                                                  * @constructor\n                                                  * @alias Autodesk.Viewing.HotkeyManager\n                                                  */\nexport function HotkeyManager() {\n  var stack = []; // The hotkey stack\n\n  var keys = []; // The keys that are currently held\n\n  // Pending items\n  var onPressQueue = [];\n  var onReleaseQueue = [];\n\n  var _names = [\"hotkeys\"];\n\n  function getNames()\n  {\n    return _names;\n  }\n\n  function getName()\n  {\n    return _names[0];\n  }\n\n  function isActive() {\n    return true;\n  }\n\n  // Apparently javascript sorts by string values by default so we need\n  // our own sort function.\n  function compare(a, b) {\n    return a - b;\n  }\n\n  /**\n     * Pushes new hotkeys onto the stack.\n     *\n     * @param {string} id - The id for this hotkey set.\n     * @param {Autodesk.Viewing.HotkeyManager~Hotkey[]} hotkeys - The list of hotkeys.\n     * @param {object} [options] - An optional dictionary of options for this hotkey set.\n     * @param {boolean} [options.tryUntilSuccess] - When true, the onPress callback will be called until it returns true\n     * or the hotkey state changes. The onRelease callback will be called until it returns true or\n     * until the combination is reengaged. Stops propagation through the stack. Non-blocking.\n     * @returns {boolean} True if the hotkeys were successfully pushed.\n     */\n  function pushHotkeys(id, hotkeys, options) {\n    var idAlreadyUsed = stack.some(function (element) {\n      return element.id === id;\n    });\n\n    if (idAlreadyUsed) {\n      return false;\n    }\n\n    for (var i = 0; i < hotkeys.length; i++) {\n      stack.push({\n        id: id,\n        keys: hotkeys[i].keycodes.sort(compare).join(),\n        onPress: hotkeys[i].onPress,\n        onRelease: hotkeys[i].onRelease,\n        options: options || {} });\n\n    }\n\n    return true;\n  }\n\n  /**\n     * Removes hotkeys associated with an ID from the stack.\n     *\n     * @param {string} id - The id associated with the hotkeys.\n     * @returns {boolean} True if the hotkeys were successfully popped.\n     */\n  function popHotkeys(id) {\n    var found = false;\n    for (var i = stack.length - 1; i >= 0; i--) {\n      if (stack[i].id === id) {\n        stack.splice(i, 1);\n        found = true;\n      }\n    }\n\n    return found;\n  }\n\n  function cleanQueues() {\n    var index = keys.join();\n\n    var item;\n    var i;\n\n    for (i = 0; i < onReleaseQueue.length;) {\n      item = onReleaseQueue[i];\n      if (item.keys === index) {\n        onReleaseQueue.splice(i, 1);\n      } else {\n        i++;\n      }\n    }\n\n    for (i = 0; i < onPressQueue.length;) {\n      item = onPressQueue[i];\n      if (item.keys !== index) {\n        onPressQueue.splice(i, 1);\n      } else {\n        i++;\n      }\n    }\n  }\n\n  function handleKeyDown(event, keyCode) {\n    if (keys.indexOf(keyCode) !== -1) {\n      // Ignore duplicate key down events. (see ToolController.applyKeyMappings())\n      return;\n    }\n\n    var currentIndex = keys.join();\n    var currentKeys = keys.slice(0);\n\n    var i = 0;\n    while (i < keys.length && keys[i] < keyCode) {\n      i++;\n    }\n    keys.splice(i, 0, keyCode);\n\n    var newIndex = keys.join();\n    var newKeys = keys.slice(0);\n\n    cleanQueues();\n\n    // Make sure onRelease is called before onPress\n    var releaseHandlers = [];\n    var pressHandlers = [];\n    var item;\n\n    for (i = stack.length - 1; i >= 0; i--) {\n      item = stack[i];\n      if (item.keys === currentIndex && item.onRelease) {\n        releaseHandlers.unshift(item);\n      } else if (item.keys === newIndex && item.onPress) {\n        pressHandlers.unshift(item);\n      }\n    }\n\n    for (i = releaseHandlers.length - 1; i >= 0; i--) {\n      item = releaseHandlers[i];\n      if (item.onRelease(currentKeys)) {\n        break;\n      } else if (item.options.tryUntilSuccess) {\n        onReleaseQueue.unshift(item);\n      }\n    }\n\n    for (i = pressHandlers.length - 1; i >= 0; i--) {\n      item = pressHandlers[i];\n      if (item.onPress(newKeys)) {\n        break;\n      } else if (item.options.tryUntilSuccess) {\n        onPressQueue.unshift(item);\n      }\n    }\n  }\n\n  function handleKeyUp(event, keyCode) {\n    var currentIndex = keys.join();\n    var currentKeys = keys.slice(0);\n\n    var i = keys.indexOf(keyCode);\n    if (i > -1) {\n      keys.splice(i, 1);\n    }\n\n    var newIndex = keys.join();\n    var newKeys = keys.slice(0);\n\n    cleanQueues();\n\n    // Make sure onRelease is called before onPress\n    var releaseHandlers = [];\n    var pressHandlers = [];\n    var item;\n\n    for (i = stack.length - 1; i >= 0; i--) {\n      item = stack[i];\n      if (item.keys === currentIndex && item.onRelease) {\n        releaseHandlers.unshift(item);\n      } else if (item.keys === newIndex && item.onPress) {\n        pressHandlers.unshift(item);\n      }\n    }\n\n    for (i = releaseHandlers.length - 1; i >= 0; i--) {\n      item = releaseHandlers[i];\n      if (item.onRelease(currentKeys)) {\n        break;\n      } else if (item.options.tryUntilSuccess) {\n        onReleaseQueue.unshift(item);\n      }\n    }\n\n    for (i = pressHandlers.length - 1; i >= 0; i--) {\n      item = pressHandlers[i];\n      if (item.onPress(newKeys)) {\n        break;\n      } else if (item.options.tryUntilSuccess) {\n        onPressQueue.unshift(item);\n      }\n    }\n  }\n\n  function update() {\n    var item;\n    var i;\n\n    for (i = 0; i < onReleaseQueue.length;) {\n      item = onReleaseQueue[i];\n      if (item.onRelease(item.keys.split()) === true) {\n        onReleaseQueue.splice(i, 1);\n      } else {\n        i++;\n      }\n    }\n\n    for (i = 0; i < onPressQueue.length;) {\n      item = onPressQueue[i];\n      if (item.onPress(item.keys.split()) === true) {\n        onPressQueue.splice(i, 1);\n      } else {\n        i++;\n      }\n    }\n\n    return false;\n  }\n\n  function handleBlur() {\n    // Release all keys.\n    for (var i = keys.length - 1; i >= 0; i--) {\n      handleKeyUp(null, keys[i]);\n    }\n  }\n\n  return {\n    pushHotkeys: pushHotkeys,\n    popHotkeys: popHotkeys,\n    handleKeyDown: handleKeyDown,\n    handleKeyUp: handleKeyUp,\n    handleBlur: handleBlur,\n    getName: getName,\n    getNames: getNames,\n    activate: function activate() {},\n    deactivate: function deactivate() {},\n    update: update };\n\n}","/**\n * Keyboard constants\n */\nexport var KeyCode = {\n  BACKSPACE: 8,\n  TAB: 9,\n  ENTER: 13,\n  SHIFT: 16,\n  CONTROL: 17,\n  ALT: 18,\n  ESCAPE: 27,\n  SPACE: 32,\n  PAGEUP: 33,\n  PAGEDOWN: 34,\n  END: 35,\n  HOME: 36,\n  LEFT: 37,\n  UP: 38,\n  RIGHT: 39,\n  DOWN: 40,\n  INSERT: 45,\n  DELETE: 46,\n  ZERO: 48,\n  SEMICOLONMOZ: 59,\n  EQUALSMOZ: 61,\n  a: 65,\n  b: 66,\n  c: 67,\n  d: 68,\n  e: 69,\n  f: 70,\n  g: 71,\n  h: 72,\n  i: 73,\n  j: 74,\n  k: 75,\n  l: 76,\n  m: 77,\n  n: 78,\n  o: 79,\n  p: 80,\n  q: 81,\n  r: 82,\n  s: 83,\n  t: 84,\n  u: 85,\n  v: 86,\n  w: 87,\n  x: 88,\n  y: 89,\n  z: 90,\n  LCOMMAND: 91,\n  RCOMMAND: 93,\n  PLUS: 107,\n  PLUSMOZ: 171,\n  DASHMOZ: 109,\n  F1: 112,\n  F2: 113,\n  F3: 114,\n  F4: 115,\n  F5: 116,\n  F6: 117,\n  F7: 118,\n  F8: 119,\n  F9: 120,\n  F10: 121,\n  F11: 122,\n  F12: 123,\n  DASHMOZNEW: 173,\n  SEMICOLON: 186,\n  EQUALS: 187,\n  COMMA: 188,\n  DASH: 189,\n  PERIOD: 190,\n  SLASH: 191,\n  LBRACKET: 219,\n  RBRACKET: 221,\n  SINGLEQUOTE: 222,\n  COMMANDMOZ: 224 };","\nimport * as THREE from \"three\";\nimport { logger } from \"../logger/Logger\";\n\n/**\n                                            * This is the core interface to camera controls and navigation. \n                                            * The active navigation object can normally be obtained from the \"navigation\" property of the Viewer3D instance. \n                                            * Client implementations should not normally instantiate this class directly.\n                                            * \n                                            *  @class\n                                            *  @memberof Autodesk.Viewing\n                                            *  @alias Autodesk.Viewing.Navigation\n                                            *  @param {THREE.Camera} camera - The main camera object used to render the scene.\n                                            *  @constructor\n                                            */\nexport function Navigation(camera)\n{\n  var kMinFOV = 6.88; // 200 mm\n  var kMaxFOV = 100; // 10 mm\n  var kEpsilon = 0.000001;\n  var kDefaultMinDistance = 0.00001;\n\n  this.__options = {\n    dollyToPivot: false,\n    orbitPastPoles: true,\n    reverseDolly: false,\n    reverseHorizontalLook: false,\n    reverseVerticalLook: false,\n    useLeftHandedInput: false,\n    usePivotAlways: false,\n    lockNavigation: false };\n\n\n  // which actions are allowed when navigation is locked\n  this.__lockSettings = {\n    orbit: false,\n    pan: false,\n    zoom: false,\n    roll: false,\n    fov: false,\n    gotoview: false,\n    walk: false };\n\n\n  // Change these constants to alter the margin ratios (think, percentages/100).\n  // The margins are how much to add above and below. For example, setting the\n  // margin to 25% (0.25) would give a margin of 25% above, 50% in the middle for\n  // content, and 25% below. This value should never be >= 0.50, as that would\n  // leave no area for the content to display.\n  // The offsets are how much to shift the view. For example, shifting 50% (0.50)\n  // vertically would move the displayed area such that only the bottom half of\n  // the drawing area would be seen.\n  this.FIT_TO_VIEW_VERTICAL_MARGIN = 0.05;\n  this.FIT_TO_VIEW_VERTICAL_OFFSET = 0.00;\n  this.FIT_TO_VIEW_HORIZONTAL_MARGIN = 0.05;\n  this.FIT_TO_VIEW_HORIZONTAL_OFFSET = 0.00;\n\n  this.__pivotIsSetFlag = false;\n  this.__fitToViewRequested = false;\n  this.__homeViewRequested = false;\n  this.__transitionActive = false;\n  this.__destinationView = null;\n  this.__is2D = false;\n  this.__isTouchDevice = false;\n  this.__kEpsilon = kEpsilon;\n  this.__minDistance = kDefaultMinDistance;\n\n  // Only for 2D: Optional constraints to keep data within the view.\n  var _maxViewRegion = undefined; // {THREE.Box3} restrict zoom-out/pan to keep it well visible (only xy used)\n  var _maxPixelsPerUnit = undefined; // Restrict zoom-in so that a world-space unit does not exceed a given\n  // number of pixels on screen.\n  var _maxDistanceFactor = 2.0;\n  var _minDistanceFactor = 200.0; // limits zoom-in to show 1/200th of the entire 2D page or more. TODO: Figure this value during load.\n\n  var _camera = null;\n\n  var _viewport = { left: 0, top: 0, width: 1, height: 1 };\n\n  var _minLineWidth = Number.MAX_VALUE;\n\n  this.uninitialize = function ()\n  {\n    this.setCamera(null);\n  };\n\n  this.setMinimumLineWidth = function (lineWidth) {\n    _minLineWidth = lineWidth || Number.MAX_VALUE;\n  };\n\n  /**\n      * Set or unset the current camera used for navigation. Normally set via the constructor.\n      * The camera should be of type Autodesk.Viewing.UnifiedCamera.\n      *  @param {Autodesk.Viewing.UnifiedCamera} camera - the current camera object.\n      */\n  this.setCamera = function (camera)\n  {\n    if (camera !== _camera)\n    {\n      _camera = camera;\n      if (camera)\n      {\n        if (!camera.hasOwnProperty(\"target\"))\n        camera.target = new THREE.Vector3(0, 0, 0);\n\n        if (!camera.hasOwnProperty(\"pivot\"))\n        camera.pivot = new THREE.Vector3(0, 0, 0);\n\n        camera.worldup = camera.up.clone(); // Initial assumption!!\n        camera.dirty = true;\n      }\n    }\n  };\n\n  /**\n      *  @returns {THREE.Camera} - the current camera object.\n      */\n  this.getCamera = function ()\n  {\n    return _camera;\n  };\n\n  /**\n      * Set the current canvas viewport in screen coordinates.\n      * Invoked internally on canvas resize.\n      *  @param {Object} viewport - Rectangle with properties left, top, width, height.\n      */\n  this.setScreenViewport = function (viewport)\n  {\n    _viewport = viewport;\n  };\n\n  /**\n      * Get the current canvas viewport in screen coordinates.\n      *  @returns {Object} with properties left, top, width, height.\n      */\n  this.getScreenViewport = function ()\n  {\n    return _viewport;\n  };\n\n  /**\n      * @private\n      */\n  this.__setUp = function (up)\n  {\n    if (up && _camera)\n    {\n      var upCheck = up.clone().normalize();\n      var diff = upCheck.sub(_camera.worldup);\n      if (diff.lengthSq() !== 0.0)\n      {\n        _camera.worldup.copy(up).normalize();\n        _camera.dirty = true;\n        return true;\n      }\n    }\n    return false;\n  };\n\n  /**\n      * @private\n      */\n  this.__getUp = function ()\n  {\n    return _camera ? _camera.worldup : new THREE.Vector3(0, 1, 0);\n  };\n\n  /**\n      * Sets the cameras position and view direction.\n      *  @param {THREE.Vector3} position - the new position for the camera in world space.\n      *  @param {THREE.Vector3} target - the point in world space that the camera should look towards.\n      */\n  this.setView = function (position, target)\n  {\n    if (_camera && position && target)\n    {\n      _camera.position.copy(position);\n      _camera.target.copy(target);\n      _camera.dirty = true;\n    }\n  };\n\n  /**\n      * Orient the camera's up direction with the current world up direction\n      */\n  this.orientCameraUp = function ()\n  {\n    if (_camera && this.isActionEnabled('roll'))\n    {\n      _camera.up.copy(this.getAlignedUpVector()); // New up aligned with world up\n      _camera.dirty = true;\n    }\n  };\n\n  /**\n      *  @returns {THREE.Vector3} the world space position of the pivot point for orbit navigation.\n      */\n  this.getPivotPoint = function ()\n  {\n    return _camera ? _camera.pivot.clone() : new THREE.Vector3(0, 0, 0);\n  };\n\n  /**\n      * Sets the Vector3 world space position of the pivot point for orbit navigation.\n      *  @param {THREE.Vector3} pivot - the new pivot position.\n      */\n  this.setPivotPoint = function (pivot)\n  {\n    if (_camera && pivot)\n    {\n      _camera.pivot.copy(pivot);\n    }\n  };\n\n  /**\n      *  @returns {THREE.Vector3} the world space position of the camera.\n      */\n  this.getPosition = function ()\n  {\n    return _camera ? _camera.position.clone() : new THREE.Vector3(0, 0, 1);\n  };\n\n  /**\n      * Sets the Vector3 world space position of camera.\n      *  @param {THREE.Vector3} pos - the new camera position.\n      */\n  this.setPosition = function (pos)\n  {\n    if (_camera && pos)\n    {\n      _camera.position.copy(pos);\n      _camera.dirty = true;\n    }\n  };\n\n  /**\n      * Sets the Vector3 world space position towards which the camera should be pointing.\n      *  @param {THREE.Vector3} target - the new camera look at point.\n      */\n  this.setTarget = function (target)\n  {\n    if (_camera && target)\n    {\n      _camera.target.copy(target);\n      _camera.dirty = true;\n    }\n  };\n\n  /**\n      *  @returns {THREE.Vector3} the world space position towards which the camera is pointing.\n      */\n  this.getTarget = function ()\n  {\n    return _camera ? _camera.target.clone() : new THREE.Vector3(0, 0, 0);\n  };\n\n  /**\n      * Get the current camera view vector. This vector is not normalized and its\n      * length is the distance between the camera position and the camera look at point.\n      *  @returns {THREE.Vector3} the current camera view vector in world space.\n      */\n  this.getEyeVector = function ()\n  {\n    return _camera ? _camera.target.clone().sub(_camera.position) : new THREE.Vector3(0, 0, -1);\n  };\n\n  /**\n      * Get a vector from the camera location to the center of the input bounding box.\n      * @param {THREE.Box3} bounds - Bounding box.\n      * @returns {THREE.Vector3} - The vector from the camera location to the center of the input bounds.\n      */\n  this.getEyeToCenterOfBoundsVec = function (bounds)\n  {\n    return _camera ? bounds.center().sub(_camera.position) : new THREE.Vector3(0, 0, -1);\n  };\n\n  /**\n      *  @returns {number} the minimum allowed vertical field of view in degrees.\n      */\n  this.getFovMin = function ()\n  {\n    return kMinFOV;\n  };\n\n  /**\n      *  @returns {number} the maximum allowed vertical field of view in degrees.\n      */\n  this.getFovMax = function ()\n  {\n    return kMaxFOV;\n  };\n\n  /**\n      * Limits zoom in to show 1/factor-th of the entire 2D page.\n      * Applies only on 2D vectorized models.\n      * \n      * @param {number} factor \n      */\n  this.setZoomInLimitFactor = function (factor) {\n    _minDistanceFactor = factor;\n  };\n\n  /**\n      * @returns {number} the current limit when zooming into 2D vectorized models. \n      */\n  this.getZoomInLimitFactor = function () {\n    return _minDistanceFactor;\n  };\n\n  /**\n      * Limits zoom out to a multiplier of the model's bounding box dimensions.\n      * Applies to 2D and 3D models.\n      * \n      * @param {number} factor\n      */\n  this.setZoomOutLimitFactor = function (factor) {\n    _maxDistanceFactor = factor;\n  };\n\n  /**\n      * @returns {number} the current limit when zooming out 2D and 3D models.\n      */\n  this.getZoomOutLimitFactor = function () {\n    return _maxDistanceFactor;\n  };\n\n  /**\n      * Returns true if the point is visible.\n      *\n      * @param {THREE.Vector3} point - The point in world coordinates.\n      *\n      * @returns {boolean} - True if the point is within the camera's frustum.\n      */\n  this.isPointVisible = function (point)\n  {\n    var cameraFrustum = new THREE.Frustum().setFromMatrix(_camera.projectionMatrix.clone().multiply(_camera.matrixWorldInverse));\n    return cameraFrustum.containsPoint(point);\n  };\n\n  /**\n      * Set the current vertical field of view.\n      *  @param {number} fov - the new field of view in degrees (value is clamped to the minimum and maximum field of view values).\n      *  @param {boolean} adjustPosition - If true, the camera position will be modified to keep either the world space area\n      *                                    of the view at the pivot point unchanged (if it is set and visible) or the world\n      *                                    space area of view at the camera look at point unchanged.\n      */\n  this.setVerticalFov = function (fov, adjustPosition)\n  {\n    // If camera is not perspective don't allow fov change\n    if (_camera && !_camera.isPerspective)\n    return;\n\n    if (fov < kMinFOV) fov = kMinFOV;else\n    if (fov > kMaxFOV) fov = kMaxFOV;\n\n    if (_camera && this.isActionEnabled('fov'))\n    {\n      if (Math.abs(_camera.fov - fov) <= kEpsilon)\n      return;\n\n      if (adjustPosition)\n      {\n        var usePivot = this.__pivotIsSetFlag && this.isPointVisible(this.getPivotPoint());\n\n        var pos = this.getPosition();\n        var eye = this.getEyeVector();\n\n        var oldFOV = THREE.Math.degToRad(_camera.fov);\n        var newFOV = THREE.Math.degToRad(fov);\n\n        var oldDistance = usePivot ? this.getPivotPlaneDistance() : eye.length();\n        var newDistance = oldDistance * Math.tan(oldFOV * 0.5) / Math.tan(newFOV * 0.5);\n\n        var delta = eye.normalize().multiplyScalar(oldDistance - newDistance);\n        this.setPosition(pos.add(delta));\n\n        if (usePivot) {\n          this.setTarget(this.getTarget().add(delta));\n        }\n      }\n      _camera.setFov(fov);\n      _camera.dirty = true;\n    }\n  };\n\n  /**\n      * Applies a rotation on a single point\n      *  @param {THREE.Vector3} point - Point to rotate\n      *  @param {number} angle - Angle of rotation (in radians)\n      *  @param {THREE.Vector3} pivot - Pivot of rotation\n      *  @param {THREE.Vector3} viewVec - Front vector\n      */\n  this.applyRotation = function (point, angle, pivot, viewVec) {\n    point.sub(pivot);\n    point.applyAxisAngle(viewVec, angle);\n    point.add(pivot);\n  };\n\n  /**\n      * Computes a signed angle between two vectors\n      *  @param {THREE.Vector3} v1 - Vector #1\n      *  @param {THREE.Vector3} v2 - Vector #2\n      *  @param {THREE.Vector3} viewVec - Front vector\n      *  @returns {number} Signed angle between two vectors\n      */\n  this.getSignedAngle = function (v1, v2, viewVec) {\n    var angle = v1.angleTo(v2);\n    var n = v1.clone().cross(v2).normalize();\n    var sign = viewVec.dot(n) > 0 ? 1 : -1;\n\n    return angle * sign;\n  };\n\n  /**\n      * Compute camera position and look at point which will fit the given bounding box in the view frustum at the given field of view angle.\n      *  @param {THREE.Vector3} oldpos - existing camera position\n      *  @param {THREE.Vector3} oldcoi - existing camera look at point\n      *  @param {number} fov - field of view (in degrees) to use for fit calculation in degrees\n      *  @param {THREE.Box3} bounds - bounding box to fit\n      *  @param {number} aspect - optional aspect ratio of window, horizontal/vertical\n      *  @returns {Object} Object with properties \"position\" and \"target\".\n      */\n  this.computeFit = function (oldpos, oldcoi, fov, bounds, aspect)\n  {\n    if (!bounds || bounds.empty())\n    return { position: oldpos, target: oldcoi };\n\n    aspect = aspect === undefined ? 1.0 : aspect;\n\n    var coi = bounds.center();\n    var size = bounds.size();\n\n    var eye = oldpos.clone().sub(oldcoi).normalize();\n\n    var fovHalfWorldWidth = Math.tan(THREE.Math.degToRad(fov * 0.5));\n    var fitToViewDistance = 0.0;\n    // make sure up is orthogonal to eye view direction\n    var up = this.computeOrthogonalUp(oldpos, oldcoi);\n    var right = eye.clone().cross(up).normalize();\n\n    var v1 = new THREE.Vector3();\n    // if size.z is 0.0 (normal for 2D), we only go to 4, as we need only the four corners of a square.\n    var corners = size.z === 0.0 ? 4 : 8;\n    for (var i = 0; i < corners; i++) {\n      // get the Nth corner of the bounding box, centered around its center\n      v1.set(\n      (i & 0x1) == 0 ? -0.5 * size.x : 0.5 * size.x,\n      (i & 0x2) == 0 ? -0.5 * size.y : 0.5 * size.y,\n      (i & 0x4) == 0 ? -0.5 * size.z : 0.5 * size.z);\n\n\n      // Fit each bounds and find that distance, also depending on the aspect ratio.\n      // The eyeDot distance brings our 2d test plane to where the corner is located\n      // along the z axis, so is indeed a signed distance.\n      // The other two distances, computed with up and right vectors, are positive,\n      // which is why Math.abs is used.\n\n      // Dot product with the eye vector is how far to move the 2D viewing plane\n      // to contain the point. Matters only for perspective camera.\n      var eyeDot = 0.0;\n      if (camera.isPerspective) {\n        eyeDot = v1.dot(eye);\n      }\n      var upDot = Math.abs(v1.dot(up));\n      var rightDot = Math.abs(v1.dot(right));\n\n      // vertical distance used to compute how far back to move the camera\n      var testDistance = eyeDot +\n      (1.0 + 2.0 * this.FIT_TO_VIEW_VERTICAL_MARGIN / (1.0 - 2.0 * this.FIT_TO_VIEW_VERTICAL_MARGIN)) *\n      upDot / fovHalfWorldWidth;\n      if (fitToViewDistance < testDistance)\n      fitToViewDistance = testDistance;\n\n      // horizontal distance used to compute how far back to move the camera\n      testDistance = eyeDot +\n      (1.0 + 2.0 * this.FIT_TO_VIEW_HORIZONTAL_MARGIN / (1.0 - 2.0 * this.FIT_TO_VIEW_HORIZONTAL_MARGIN)) *\n      rightDot / (aspect * fovHalfWorldWidth);\n      if (fitToViewDistance < testDistance)\n      fitToViewDistance = testDistance;\n    }\n\n    // adjust coi by vertical percentage, which keeps it centered above the view controls\n    coi.add(up.multiplyScalar(-fitToViewDistance * this.FIT_TO_VIEW_VERTICAL_OFFSET));\n    coi.add(right.multiplyScalar(fitToViewDistance * this.FIT_TO_VIEW_HORIZONTAL_OFFSET));\n\n    eye.multiplyScalar(fitToViewDistance);\n\n    var pos = coi.clone().add(eye);\n    return { position: pos, target: coi };\n  };\n\n  /**\n      * Compute a vector which is orthogonal to the given view and aligned with the world up direction.\n      *  @param {THREE.Vector3} pos - view position\n      *  @param {THREE.Vector3} coi - center of interest (view look at point)\n      *  @returns {THREE.Vector3} up direction orthogonal to the given view\n      */\n  this.computeOrthogonalUp = function (pos, coi)\n  {\n    var worldUp = this.__getUp();\n    var eye = coi.clone().sub(pos);\n    if (eye.lengthSq() === 0.0) // Invalid view?\n      return eye.copy(worldUp);\n\n    var right = eye.clone().cross(worldUp);\n    if (right.lengthSq() === 0)\n    {\n      // If eye and up are colinear, perturb eye\n      // to get a valid result:\n      if (worldUp.z > worldUp.y)\n      eye.y -= 0.0001;else\n\n      eye.z -= 0.0001;\n\n      right.crossVectors(eye, worldUp);\n    }\n    return right.cross(eye).normalize();\n  };\n\n  /**\n      * Causes the current camera position to be changed in order to fit the given bounds into the current view frustum.\n      *  @param {boolean} immediate - if false the camera position will animate to the new location.\n      *  @param {THREE.Box3} bounds - bounding box to fit\n      *  @param {boolean} reorient - if true the camera up direction will be reoriented with the world up.\n      *  @param {boolean} force - if true will perform regardless of gotoview enabled or not.\n      *  @returns {Object} Object with properties \"position\" and \"target\".\n      */\n  this.fitBounds = function (immediate, bounds, reorient, force) {\n    var oldcoi = this.getTarget();\n    var pos = this.getPosition();\n\n    if (!this.isActionEnabled('gotoview') && !force || !bounds || bounds.empty()) {\n      return { position: pos, target: oldcoi };\n    }\n\n    var fov = this.getVerticalFov();\n\n    // In case camera up is not aligned with world up, the bounds need to rotated according to the camera's rotation.\n    if (!reorient) {\n      bounds = this.rotateBoundsToCamera(bounds, pos, oldcoi);\n    }\n\n    var fit = this.computeFit(pos, oldcoi, fov, bounds, _camera.aspect);\n    var up = reorient ? this.computeOrthogonalUp(pos, oldcoi) : _camera.up;\n\n    if (immediate) {\n      _camera.up.copy(up);\n      this.setView(fit.position, fit.target);\n    } else {\n      this.setRequestTransitionWithUp(true, fit.position, fit.target, fov, up);\n    }\n    this.setPivotPoint(fit.target);\n    this.setPivotSetFlag(true);\n\n    return fit;\n  };\n\n  this.rotateBoundsToCamera = function (bounds, pos, target) {\n    bounds = bounds.clone();\n    var coi = bounds.center();\n    var eye = pos.clone().sub(target).normalize();\n    var cameraRotation = this.getSignedAngle(this.getCameraUpVector(), this.getAlignedUpVector(), eye);\n    this.applyRotation(bounds.min, cameraRotation, coi, eye);\n    this.applyRotation(bounds.max, cameraRotation, coi, eye);\n    bounds.setFromPoints([bounds.min.clone(), bounds.max.clone()]);\n\n    return bounds;\n  };\n\n  /**\n      * Compute the minimum required distance to keep _maxViewRegion fully visible at once.\n      * @param {THREE.Box3} bounds\n      * @private\n      */\n  this.computeOverviewDistance = function (bounds) {\n    if (this.__is2D) {\n      var size = bounds.size();\n      var aspect = _camera.aspect;\n\n      // Restrict zoom-out, so that it stops if maxViewRegion fits into the canvas\n      // For ortho-cameras, we have (see UnififiedCamera.toOrthographic)\n      //  frustumHeight == orthoScale == distance\n      //  frustumWidth                == distance * aspect\n      // Therefore, the distances at which the x/y-extent of the model matches the canvas is:\n      var maxDistX = size.x / aspect;\n      var maxDistY = size.y;\n\n      // allow enough zoom-out that neither x nor y is cropped\n      return Math.max(maxDistX, maxDistY);\n    } else\n    {\n      var fov = this.getVerticalFov();\n      var size = bounds.size();\n      var diameter = size.length();\n      if (diameter === 0.0)\n      diameter = 2.0;\n\n      if (_camera.isPerspective) {\n        return 0.5 * diameter / Math.tan(THREE.Math.degToRad(fov * 0.5));\n      } else {\n        return diameter;\n      }\n    }\n  };\n\n  /**\n      * Helper function used to for dolly operations. \n      * It adjusts the given scaleFactor if needed to preserve zoom-in/out restrictions.\n      * @param {Number} scaleFactor - Distance scale factor going to be applied by a dolly interaction\n      * @param {THREE.Box3} bounds - bounding box to fit\n      * @returns {Number} adjustedScaleFactor\n      * @private\n      */\n  this.applyDollyConstraint = function (scaleFactor, bounds) {\n\n    // default: just return identity if no constraint is active\n    if (!(_maxViewRegion || _maxPixelsPerUnit || _maxDistanceFactor) || !this.__is2D) {\n      return scaleFactor;\n    }\n\n    var adjustedScaleFactor = scaleFactor;\n\n\n    // restrict max distance, only if zooming out.\n    if (_maxViewRegion && _maxDistanceFactor && bounds && scaleFactor > 1) {\n      // For orthographic cameras, the length of the eye vector is what we need\n      // to limit, not the distance to the bounds, which works for perpsective cameras\n      var viewVec = _camera.isPerspective ? this.getEyeToCenterOfBoundsVec(bounds) : this.getEyeVector();\n\n      var maxDist;\n      if (_maxViewRegion)\n        // stop zoom-out if the whole viewRegion becomes smaller than half of the screen\n        maxDist = _maxDistanceFactor * this.computeOverviewDistance(_maxViewRegion);else\n\n        // stop zoom-out if the model's bounding box becomes smaller than half (_maxDistanceFactor) of the screen\n        maxDist = _maxDistanceFactor * this.computeOverviewDistance(bounds);\n\n      // restrict scale-factor, so that viewVec.z doesn't exceed maxDist\n      var maxScaleFactor = Math.abs(maxDist / viewVec.length());\n\n\n      // after changing canvas width, the maxDist constraint may be temporarily broken.\n      // we don't want to jump the camera back in this case - only avoid zooming out even more.\n      // Therefore, we never force a scaleFactor below 1.0 (=no change).\n      maxScaleFactor = Math.max(maxScaleFactor, 1.0);\n\n      // apply zoom-out restriction\n      adjustedScaleFactor = Math.min(adjustedScaleFactor, maxScaleFactor);\n    }\n\n\n    // restrict zoom-in, so that a single world-space unit does not exceed maxPixelsPerUnit.\n    if (_maxPixelsPerUnit || _minDistanceFactor && bounds) {\n\n      // At a given distance d, the world-space size to match the canvas height is the frustum height.\n      // Therefore, the pixel size of a world-space unit (ppu) is:\n      //  ppu = canvasHeight / frustumHeight = canvasHeight / distance\n      // Therefore, the distance at which we reach ppu == maxPixelsPerUnit is:\n      var minDist;\n      if (_maxPixelsPerUnit) {\n        minDist = _camera.clientHeight / _maxPixelsPerUnit;\n      } else {\n        // The maximum zoom-in limit is the size of the thinnest line. We know this only after everything is loaded.\n        // If the user will zoom in before it, we will use a maximum size that is based on the page size.\n        minDist = Math.min(_minLineWidth, this.computeOverviewDistance(bounds) / _minDistanceFactor);\n      }\n\n      // restrict scale-factor, so that viewVec.z doesn't fall below minDist\n      var viewVec = this.getEyeVector();\n      var minScaleFactor = minDist / -viewVec.z;\n\n      // Just restrict movement, but don't let the camera jump (see maxScaleFactor comment above)\n      minScaleFactor = Math.min(minScaleFactor, 1.0);\n\n      // apply zoom-in restriction\n      adjustedScaleFactor = Math.max(adjustedScaleFactor, minScaleFactor);\n    }\n\n    return adjustedScaleFactor;\n  };\n\n  /**\n      * If a _maxViewRegion is set (only for 2D mode), this function adjusts\n      * the given panning offset, so that the camera keeps within the given view region (in xy).\n      * @param {THREE.Vector3} offsetVector to be added by panning movement\n      * @private\n      */\n  this.applyPanningConstraint2D = function (inOutOffset) {\n\n    // default: just do nothing unless we are using 2D with _maxViewRegion constraint\n    if (!this.__is2D || !_maxViewRegion) {\n      return;\n    }\n\n    // compute new camera pos after offset + constraint\n    var newPosX = _camera.position.x + inOutOffset.x;\n    var newPosY = _camera.position.y + inOutOffset.y;\n    newPosX = THREE.Math.clamp(newPosX, _maxViewRegion.min.x, _maxViewRegion.max.x);\n    newPosY = THREE.Math.clamp(newPosY, _maxViewRegion.min.y, _maxViewRegion.max.y);\n\n    // compute resulting adjusted offset\n    var offsetX = newPosX - _camera.position.x;\n    var offsetY = newPosY - _camera.position.y;\n\n    // We only want to restrict the panning movement, but don't jump suddenly\n    // back if the camera is already outside. Therefore, we restrict\n    // the adjusted offset to be within 0.0 (= no change) and the initial one.\n    var offsetXMin = Math.min(inOutOffset.x, 0.0);\n    var offsetYMin = Math.min(inOutOffset.y, 0.0);\n    var offsetXMax = Math.max(inOutOffset.x, 0.0);\n    var offsetYMax = Math.max(inOutOffset.y, 0.0);\n    offsetX = THREE.Math.clamp(offsetX, offsetXMin, offsetXMax);\n    offsetY = THREE.Math.clamp(offsetY, offsetYMin, offsetYMax);\n\n    // replace offsetVector.xy by adjusted values\n    inOutOffset.x = offsetX;\n    inOutOffset.y = offsetY;\n  };\n\n  /**\n      * Update the current camera projection matrix and orient the camera to the current look at point.\n      * Invoked internally prior to rendering a new frame with the current camera.\n      */\n  this.updateCamera = function ()\n  {\n    if (_camera)\n    {\n      _camera.updateProjectionMatrix();\n      this.orient(_camera, _camera.target, _camera.position, _camera.up);\n      _camera.dirty = false;\n    }\n  };\n\n  this.setCamera(camera);\n\n  /**\n                           * Applies zooming and panning restrictions when viewing 2D models. Invoke without\n                           * parameters to clear any previous setting.\n                           * \n                           * @param {THREE.Box3} [viewRegion]   - in world space. If specified, navigation is restricted so that this region\n                           *                                      always spans >= half of the screen extent in x and y.\n                           * @param {Number}  [maxPixelPerUnit] - Restrict zoom-In, so that a single unit in world-space never\n                           *                                      exceeds maxPixelPerUnit on screen.\n                           */\n  this.setConstraints2D = function (viewRegion, maxPixelPerUnit) {\n    _maxViewRegion = viewRegion;\n    _maxPixelsPerUnit = maxPixelPerUnit;\n  };\n}\n\nNavigation.prototype.constructor = Navigation;\n\n/**\n                                                * @private\n                                                */\nNavigation.prototype.setIs2D = function (state)\n{\n  this.__is2D = !!state;\n};\n\n/**\n    * @private\n    */\nNavigation.prototype.getIs2D = function ()\n{\n  return this.__is2D;\n};\n\n/**\n    * @private\n    */\nNavigation.prototype.setIsTouchDevice = function (state)\n{\n  this.__isTouchDevice = !!state;\n};\n\n/**\n    * @private\n    */\nNavigation.prototype.getIsTouchDevice = function ()\n{\n  return this.__isTouchDevice;\n};\n\n/**\n    * Rotate the given object so that its negative Z axis is directed towards the given point in world space. \n    * Used internally to orient the camera towards the target look at point. \n    * This is a modified version of THREE.Object3D.lookAt method that uses different solution for the singular \n    * case when (view X up) == 0.\n    *  @param {THREE.Object3D} object - the object to be oriented\n    *  @param {THREE.Vector3} target - the world space point to orient towards\n    *  @param {THREE.Vector3} from - the world space position of the object being rotated\n    *  @param {THREE.Vector3} up - the direction to align the objects Y axis with\n    */\nNavigation.prototype.orient = function ()\n{\n  var m1;\n  var x;\n  var y;\n  var z;\n\n  function init_three() {\n    if (m1)\n    return;\n\n    m1 = new THREE.Matrix4();\n    x = new THREE.Vector3();\n    y = new THREE.Vector3();\n    z = new THREE.Vector3();\n  }\n\n  return function (object, target, from, up)\n  {\n    init_three();\n\n    var te = m1.elements;\n\n    z.subVectors(from, target).normalize();\n    if (z.lengthSq() === 0) {\n      z.z = 1;\n    }\n    x.crossVectors(up, z).normalize();\n    if (x.lengthSq() === 0) {\n      // If Z is up then cross with Y to get X\n      // otherwize cross with Z to get X.\n      if (up.z > up.y)\n      z.y -= 0.0001;else\n\n      z.z += 0.0001;\n\n      x.crossVectors(up, z).normalize();\n    }\n    y.crossVectors(z, x);\n\n    te[0] = x.x;te[4] = y.x;te[8] = z.x;\n    te[1] = x.y;te[5] = y.y;te[9] = z.y;\n    te[2] = x.z;te[6] = y.z;te[10] = z.z;\n\n    object.setRotationFromMatrix(m1);\n  };\n}();\n\n/**\n      * Convert a vertical field of view angle in degrees to a 35mm camera focal length value.\n      *  @param {number} fov - vertical field of view in degrees\n      *  @returns {number} focal length in millimeters\n      */\nNavigation.prototype.fov2fl = function (fov)\n{\n  // Note: the size of the 35mm camera back is 36x24mm.  Since we are setting and\n  // getting the vertical FOV, we need to use the vertical measurement of 24mm, or\n  // rather half of that (12.0) in our calculations.\n  var k35mmVerticalCameraBackSize = 12.0;\n\n  // Given a vertical field-of-view, return the focal length in millimeters\n  // that it corresponds to in a 35mm film camera.\n  var rads = THREE.Math.degToRad(fov);\n  if (rads <= 0.0)\n  rads = 0.0001;\n  return Math.round(k35mmVerticalCameraBackSize / Math.tan(rads * 0.5));\n};\n\n/**\n    * Convert a 35mm camera focal length value to a vertical field of view angle in degrees.\n    *  @param {number} fl - focal length in millimeters\n    *  @returns {number} vertical field of view in degrees\n    */\nNavigation.prototype.fl2fov = function (fl)\n{\n  // Note: the size of the 35mm camera back is 36x24mm.  Since we are setting and\n  // getting the vertical FOV, we need to use the vertical measurement of 24mm, or\n  // rather half of that (12.0) in our calculations.\n  var k35mmVerticalCameraBackSize = 12.0;\n\n  // Given a focal length, return the vertical field of view that\n  // this would correspond to in a 35mm camera.\n  if (fl <= 0)\n  fl = 0.0001;\n\n  var rads = 2.0 * Math.atan(k35mmVerticalCameraBackSize / fl);\n  return THREE.Math.radToDeg(rads);\n};\n\n/**\n    * Set the up direction for the camera. The given vector should be orthogonal to the current view direction.\n    *  @method\n    *  @param {THREE.Vector3} up - the new up direction vector\n    */\nNavigation.prototype.setCameraUpVector = function (up)\n{\n  if (this.isActionEnabled('roll'))\n  {\n    var camera = this.getCamera();\n    camera.up.copy(up);\n    camera.dirty = true;\n  }\n};\n\n/**\n    * Get the world space vector which is the current cameras up direction.\n    *  @method\n    *  @returns {THREE.Vector3} the current camera up direction (normalized)\n    */\nNavigation.prototype.getCameraUpVector = function ()\n{\n  var right = this.getCameraRightVector(false);\n  var eye = this.getEyeVector();\n  return right.cross(eye).normalize();\n};\n\n/**\n    * Get the world space vector which is the orthogonal to the view direction and aligned with the world up direction.\n    *  @method\n    *  @returns {THREE.Vector3} the current camera up direction (normalized)\n    */\nNavigation.prototype.getAlignedUpVector = function ()\n{\n  var right = this.getCameraRightVector(true);\n  var eye = this.getEyeVector();\n  return right.cross(eye).normalize();\n};\n\n/**\n    * Get the world space vector which is the right side direction of the current camera.\n    *  @method\n    *  @param {boolean} worldAligned - if true get the right vector aligned with the world up, otherwise use the current camera's up direction.\n    *  @returns {THREE.Vector3} the current camera right direction, orthogonal to view and up (normalized)\n    */\nNavigation.prototype.getCameraRightVector = function (worldAligned)\n{\n  var right = new THREE.Vector3();\n  var up = worldAligned ? this.getWorldUpVector() : this.getCamera().up;\n  var eye = this.getEyeVector();\n  right.crossVectors(eye, up);\n  if (right.lengthSq() === 0)\n  {\n    // If eye and up are collinear, choose vector:\n    // If the eye direction is mostly along the y axis, choose +Z as up, else choose +Y as up.\n    // If they match (e.g., both are zero), pick +Z, the default for maps and most mechanical.\n    if (Math.abs(eye.z) >= Math.abs(eye.y))\n    up.set(0, 1, 0);else\n\n    up.set(0, 0, 1);\n\n    right.crossVectors(eye, up);\n  }\n  return right.normalize();\n};\n\n/**\n    * Change the current world up direction.\n    *  @param {THREE.Vector3} up - the new world up direction\n    *  @param {boolean} reorient - if true, make sure the camera up is oriented towards the world up direction.\n    *  @param {boolean} force - if true, will set the new direction regardless of navigation lock\n    */\nNavigation.prototype.setWorldUpVector = function (up, reorient, force)\n{\n  if (this.isActionEnabled('roll') || force) {\n    this.__setUp(up);\n\n    if (reorient)\n    this.orientCameraUp();\n  }\n};\n\n/**\n    * Get the current world up direction.\n    *  @returns {THREE.Vector3} the current world up direction (normalized)\n    */\nNavigation.prototype.getWorldUpVector = function ()\n{\n  return this.__getUp().clone();\n};\n\n/**\n    * Compute a world right direction based on the current world up direction. \n    * This will return the normalized cross product of the current up direction with one \n    * of the major axes to provide a usable world right direction.\n    *  @method\n    *  @returns {THREE.Vector3} the computed world right direction\n    */\nNavigation.prototype.getWorldRightVector = function ()\n{\n  var right = new THREE.Vector3();\n  right.copy(this.__getUp());\n\n  if (Math.abs(right.z) <= Math.abs(right.y))\n  {\n    // Cross(Vertical, ZAxis)\n    right.set(right.y, -right.x, 0);\n  } else\n  if (right.z >= 0)\n  {\n    // Cross(YAxis, Vertical)\n    right.set(right.z, 0, -right.x);\n  } else\n\n  {\n    // Cross(Vertical, YAxis)\n    right.set(-right.z, 0, right.x);\n  }\n  return right.normalize();\n};\n\n/**\n    *  @returns {number} the current camera vertical field of view in degrees\n    */\nNavigation.prototype.getVerticalFov = function ()\n{\n  return this.getCamera().fov;\n};\n\n/**\n    *  @returns {number} the current camera horizontal field of view in degrees\n    */\nNavigation.prototype.getHorizontalFov = function ()\n{\n  var viewport = this.getScreenViewport();\n  return this.getCamera().fov * (viewport.width / viewport.height);\n};\n\n/**\n    *  @returns {number} the current camera focal length based on a 35mm camera lens model\n    */\nNavigation.prototype.getFocalLength = function ()\n{\n  return this.fov2fl(this.getVerticalFov());\n};\n\n/**\n    * Set the current cameras field of view using a 35mm camera focal length value\n    *  @param {number} millimeters - focal length in millimeters\n    *  @param {boolean} adjustPosition - If true, the camera position will be modified to keep either the world space area\n    *                                    of the view at the pivot point unchanged (if it is set and visible) or the world\n    *                                    space area of view at the camera look at point unchanged.\n    */\nNavigation.prototype.setFocalLength = function (millimeters, adjustPosition)\n{\n  this.setVerticalFov(this.fl2fov(millimeters), adjustPosition);\n};\n\n/**\n    * Set or unset a view navigation option to reverse the default direction for camera dolly (zoom) operations.\n    *  @param {boolean} state - value of the option, true for reverse, false for default\n    */\nNavigation.prototype.setReverseZoomDirection = function (state)\n{\n  this.__options.reverseDolly = !!state;\n};\n\n/**\n    * Set or unset a view navigation option to reverse the default direction for horizontal look operations.\n    *\n    * Not applicable to 2D.\n    *\n    *  @param {boolean} state - value of the option, true for reverse, false for default\n    */\nNavigation.prototype.setReverseHorizontalLookDirection = function (state)\n{\n  if (this.getIs2D())\n  {\n    logger.warn(\"Autodesk.Viewing.Navigation.setReverseHorizontalLookDirection is not applicable to 2D\");\n    return;\n  }\n\n  this.__options.reverseHorizontalLookDirection = !!state;\n};\n\n/**\n    * Set or unset a view navigation option to reverse the default direction for vertical look operations.\n    *\n    * Not applicable to 2D.\n    *\n    *  @param {boolean} state - value of the option, true for reverse, false for default\n    */\nNavigation.prototype.setReverseVerticalLookDirection = function (state)\n{\n  if (this.getIs2D())\n  {\n    logger.warn(\"Autodesk.Viewing.Navigation.setReverseVerticalLookDirection is not applicable to 2D\");\n    return;\n  }\n\n  this.__options.reverseVerticalLookDirection = !!state;\n};\n\n/**\n    * Get the state of the view navigation option which requests the reversal of the default direction for camera dolly (zoom) operations.\n    *  @returns {boolean} - value of the option, true for reverse, false for default\n    */\nNavigation.prototype.getReverseZoomDirection = function ()\n{\n  return this.__options.reverseDolly;\n};\n\n/**\n    * Get the state of the view navigation option which requests the reversal of the default horizontal look direction\n    *\n    * Not applicable to 2D.\n    *\n    *  @returns {boolean} value of the option, true for reverse, false for default\n    */\nNavigation.prototype.getReverseHorizontalLookDirection = function ()\n{\n  if (this.getIs2D())\n  {\n    logger.warn(\"Autodesk.Viewing.Navigation.getReverseHorizontalLookDirection is not applicable to 2D\");\n    return false;\n  }\n\n  return this.__options.reverseHorizontalLookDirection;\n};\n\n/**\n    * Get the state of the view navigation option which requests the reversal of the default vertical look direction\n    *\n    * Not applicable to 2D.\n    *\n    *  @returns {boolean} value of the option, true for reverse, false for default\n    */\nNavigation.prototype.getReverseVerticalLookDirection = function ()\n{\n  if (this.getIs2D())\n  {\n    logger.warn(\"Autodesk.Viewing.Navigation.getReverseVerticalLookDirection is not applicable to 2D\");\n    return false;\n  }\n\n  return this.__options.reverseVerticalLookDirection;\n};\n\n/**\n    * Set or unset a view navigation option to request the default direction for camera dolly (zoom) operations to be towards the camera pivot point. If unset the default direction would normally be towards the cursor position.\n    *  @param {boolean} state - value of the option, true for towards the pivot, false for default\n    */\nNavigation.prototype.setZoomTowardsPivot = function (state)\n{\n  this.__options.dollyToPivot = !!state;\n};\n\n/**\n    * Get the state of the view navigation option that requests the default direction for camera dolly (zoom) operations to be towards the camera pivot point.\n    *  @returns {boolean} - value of the option, true for towards the pivot, false for default\n    */\nNavigation.prototype.getZoomTowardsPivot = function ()\n{\n  return this.__options.dollyToPivot;\n};\n\n/**\n    * Set or unset a view navigation option to allow the orbit controls to move the camera beyond the north and south poles (world up/down direction). In other words, when set the orbit control will allow the camera to rotate into an upside down orientation. When unset orbit navigation should stop when the camera view direction reaches the up/down direction.\n    *\n    * Not applicable to 2D.\n    *\n    *  @param {boolean} state - value of the option, true to allow orbiting past the poles.\n    */\nNavigation.prototype.setOrbitPastWorldPoles = function (state)\n{\n  if (this.getIs2D())\n  {\n    logger.warn(\"Autodesk.Viewing.Navigation.setOrbitPastWorldPoles is not applicable to 2D\");\n    return;\n  }\n\n  this.__options.orbitPastPoles = !!state;\n};\n\n/**\n    * Get the state of the view navigation option that allows orbit controls to continue past the world up/down direction.\n    *\n    * Not applicable to 2D.\n    *\n    *  @returns {boolean} - value of the option, true if orbiting past the poles is allowed.\n    */\nNavigation.prototype.getOrbitPastWorldPoles = function ()\n{\n  if (this.getIs2D())\n  {\n    logger.warn(\"Autodesk.Viewing.Navigation.orbitPastWorldPoles is not applicable to 2D\");\n    return false;\n  }\n\n  return this.__options.orbitPastPoles;\n};\n\n/**\n    * Set or unset a view navigation option which requests that orbit controls always orbit around the currently set pivot point.\n    *  @param {boolean} state - value of the option, true to request use of the pivot point. When false some controls may pivot around the center of the view. (Currently applies only to the view-cube orbit controls.)\n    */\nNavigation.prototype.setUsePivotAlways = function (state)\n{\n  this.__options.usePivotAlways = !!state;\n};\n\n/**\n    * Get the state of the view navigation option that requests full use of the pivot point.\n    *  @returns {boolean} - value of the option, if the pivot should be used as the orbit origin.\n    */\nNavigation.prototype.getUsePivotAlways = function ()\n{\n  return this.__options.usePivotAlways;\n};\n\n/**\n    * Set or unset a view navigation option which requests that mouse buttons be reversed from their default assignment (i.e. Left mouse operation becomes right mouse and vice versa).\n    *  @param {boolean} state - value of the option, true to request reversal of mouse button assignments.\n    */\nNavigation.prototype.setUseLeftHandedInput = function (state)\n{\n  this.__options.useLeftHandedInput = !!state;\n};\n\n/**\n    * Get the state of the view navigation option that requests mouse button reversal.\n    *  @returns {boolean} - value of the option, true if reversal is requested.\n    */\nNavigation.prototype.getUseLeftHandedInput = function ()\n{\n  return this.__options.useLeftHandedInput;\n};\n\n/**\n    *  Setting this options makes wheel-zoom action automatically reset the orbit pivot to the location under the cursor.\n    *  @param {boolean} state - value of the option, true to request use of the pivot point.\n    */\nNavigation.prototype.setWheelSetsPivot = function (state)\n{\n  this.__options.wheelSetsPivot = !!state;\n};\n\nNavigation.prototype.getWheelSetsPivot = function ()\n{\n  return this.__options.wheelSetsPivot;\n};\n\n/**\n    *  Setting this options makes selection action to automatically reset the orbit pivot to be the center of the multiple selection.\n    *  @param {boolean} state - value of the option, true to request use of the pivot point.\n    */\nNavigation.prototype.setSelectionSetsPivot = function (state)\n{\n  this.__options.SelectionSetsPivot = !!state;\n};\n\nNavigation.prototype.getSelectionSetsPivot = function ()\n{\n  return this.__options.SelectionSetsPivot;\n};\n\n/**\n    * Lock or unlock view modification operations.\n    * For a more granular control of locked operations, see {@link setLockSettings}.\n    *  @param {boolean} state - when true changes to the current camera parameters are not allowed.\n    */\nNavigation.prototype.setIsLocked = function (state)\n{\n  this.__options.lockNavigation = !!state;\n};\n\n/**\n    * Get the state of the current view modification lock.\n    * For a more granular control of locked operations, see {@link setLockSettings}.\n    *  @returns {boolean} - true if view modifications are not currently allowed.\n    */\nNavigation.prototype.getIsLocked = function ()\n{\n  return this.__options.lockNavigation;\n};\n\n/**\n    * Set the availability of specific camera actions when navigation is locked using {@link setIsLocked}.\n    *  @param {object} settings Map of <action>:<bool> pairs specifying whether the given camera\n    *  action is *enabled* even when the navigation is locked.\n    *  The configurable actions are 'orbit', 'pan', 'zoom', 'roll', 'fov', or 'gotoview'.\n    *  By default, none of the camera actions are available when the navigation is locked.\n    */\nNavigation.prototype.setLockSettings = function (settings)\n{\n  for (var action in this.__lockSettings) {\n    if (settings.hasOwnProperty(action)) {\n      this.__lockSettings[action] = settings[action];\n    }\n  }\n};\n\n/**\n    * Get the availability of specific camera actions when navigation is locked using {@link setIsLocked}.\n    *  @returns {object} Map of <action>:<bool> pairs specifying whether the given camera\n    *  action is *enabled* even when the navigation is locked.\n    */\nNavigation.prototype.getLockSettings = function ()\n{\n  var settings = {};\n  for (var action in this.__lockSettings) {\n    settings[action] = this.__lockSettings[action];\n  }\n  return settings;\n};\n\n/**\n    * Check the availability of a camera action.\n    *  @param {string} action Camera action.\n    *  @returns {boolean} True if the camera action is currently enabled.\n    */\nNavigation.prototype.isActionEnabled = function (action) {\n  return !this.__options.lockNavigation || this.__lockSettings[action] === true;\n};\n\n/**\n    * Set or unset a view navigation option which indicates that the pivot camera parameter is set and can be used for orbit and zoom controls.\n    *  @param {boolean} state - value of the option. When not set orbit and zoom operations should occur at the look at position in the center of the current view.\n    */\nNavigation.prototype.setPivotSetFlag = function (state)\n{\n  this.__pivotIsSetFlag = !!state;\n};\n\n/**\n    * Get the state of the view navigation option that indicates the pivot is set.\n    *  @returns {boolean} - value of the option, true if pivot may be used.\n    */\nNavigation.prototype.getPivotSetFlag = function ()\n{\n  return this.__pivotIsSetFlag;\n};\n\n/**\n    * Issue a request to change the current cameras view position to fit the active model data into the current view frustum.\n    *  @param {boolean} state - value of the requst. Set to true in order to request the change of view.\n    */\nNavigation.prototype.setRequestFitToView = function (state)\n{\n  if (this.isActionEnabled('gotoview'))\n  this.__fitToViewRequested = !!state;\n};\n\n/**\n    * Get the state of the view navigation option requesting a camera repositioning to fit the active model data. Value will be false if a request has not been made or if having been made has been received and acted upon.\n    *  @returns {boolean} - current state of the request.\n    */\nNavigation.prototype.getRequestFitToView = function ()\n{\n  return this.__fitToViewRequested;\n};\n\n/**\n    * Issue a request to change the current cameras view to the current \"home\" view. The home view includes position, view direction, world up direction and field of view.\n    *  @param {boolean} state - value of the requst. Set to true in order to request the change of view.\n    */\nNavigation.prototype.setRequestHomeView = function (state)\n{\n  if (this.isActionEnabled('gotoview'))\n  this.__homeViewRequested = !!state;\n};\n\n/**\n    * Get the state of the view navigation option requesting a camera change to the current \"home\" view. Value will be false if a request has not been made or if having been made has been received and acted upon.\n    *  @returns {boolean} - current state of the request.\n    */\nNavigation.prototype.getRequestHomeView = function ()\n{\n  return this.__homeViewRequested;\n};\n\n/**\n    * Issue a request to transition the current cameras view to that specified by the parameters.\n    *  @param {boolean} state - value of the requst. Set to true in order to request the change of view.\n    *  @param {THREE.Vector3} pos - the new camera position in world space\n    *  @param {THREE.Vector3} coi - the point in world space that the camera should look towards.\n    *  @param {number} fov - vertical field of view in degrees\n    *  @param {boolean} reorient - set to true to recalculate up vector\n    *  @param {THREE.Vector3} pivot - the new pivot point\n    */\nNavigation.prototype.setRequestTransition = function (state, pos, coi, fov, reorient, pivot)\n{\n  if (state)\n  {\n    this.__destinationView = {\n      position: pos.clone(),\n      coi: coi.clone(),\n      fov: fov,\n      up: this.getCamera().up.clone(),\n      worldUp: this.getWorldUpVector(),\n      reorient: reorient,\n      pivot: pivot ? pivot.clone() : coi.clone() };\n\n  } else\n\n  this.__destinationView = null;\n};\n\n/**\n    * Issue a request to transition the current cameras view to that specified by the parameters which inlude both the camera up direction and optionally the world up direction.\n    *  @param {boolean} state - value of the requst. Set to true in order to request the change of view.\n    *  @param {THREE.Vector3} pos - the new camera position in world space\n    *  @param {THREE.Vector3} coi - the point in world space that the camera should look towards.\n    *  @param {number} fov - vertical field of view in degrees\n    *  @param {THREE.Vector3} up -  use this as the target camera up direction\n    *  @param {THREE.Vector3} [worldUp] - (optional) use this as the target world up direction\n    *  @param {THREE.Vector3} [pivot] - (optional) the new pivot point\n    */\nNavigation.prototype.setRequestTransitionWithUp = function (state, pos, coi, fov, up, worldUp, pivot)\n{\n  if (state)\n  {\n    this.__destinationView = {\n      position: pos.clone(),\n      coi: coi.clone(),\n      fov: fov,\n      up: up.clone(),\n      worldUp: worldUp ? worldUp : this.getWorldUpVector(),\n      reorient: false,\n      pivot: pivot ? pivot.clone() : coi.clone() };\n\n  } else\n\n  this.__destinationView = null;\n};\n\n/**\n    * Get the state of the view navigation option requesting a camera transition to a new view.\n    *  @returns {Object} - If a transition request is active, an object with properties \"position\" (Vector3), \"coi\" (Vector3), \"fov\" (Number), \"up\" (Vector3), \"worldUp\" (Vector3), \"reorient\" (boolean). Returns null when no transition is active.\n    *  @see setRequestTransitionWithUp\n    */\nNavigation.prototype.getRequestTransition = function ()\n{\n  return this.__destinationView;\n};\n\n/**\n    * Set a status indicating that the current camera view is in a transitioning state.\n    * Used internally to indicate that a transition is active.\n    *  @param {boolean} state - value of the transtion status\n    */\nNavigation.prototype.setTransitionActive = function (state)\n{\n  this.__transitionActive = !!state;\n};\n\n/**\n    *  Check the status of a view transition request.\n    *  @returns {boolean} - value of the transtion status\n    */\nNavigation.prototype.getTransitionActive = function ()\n{\n  return this.__transitionActive;\n};\n\n/**\n    *  @param {number} atDistance - Distance from the camera at which to compute the view frustum size.\n    *  @returns {THREE.Vector2} The size of the view frustum at this distance from the camera.\n    */\nNavigation.prototype.getWorldSize = function (atDistance)\n{\n  var camera = this.getCamera();\n  var aspect = camera.aspect;\n\n  var worldHeight = 2.0 * atDistance * Math.tan(THREE.Math.degToRad(camera.fov * 0.5));\n  var worldWidth = worldHeight * aspect;\n\n  return new THREE.Vector2(worldWidth, worldHeight);\n};\n\n/**\n    *  Converts from screen coordinates ((0, 0) is top left) to viewport coordinates ((-1, 1) is top left)\n    *\n    *  @param {number} x - Normalized screen X coordinate in [0, 1] range (left == 0)\n    *  @param {number} y - Normalized screen Y coordinate in [0, 1] range (top == 0)\n    *  @return {THREE.Vector3} - Point in viewport coordinates (-1, 1) is top left, x and y in range [-1, 1]\n    */\nNavigation.prototype.screenToViewport = function (x, y)\n{\n  y = 1.0 - y; // Invert Y so 0 == bottom.\n\n  // Map to [-1, 1]\n  x = x * 2.0 - 1.0;\n  y = y * 2.0 - 1.0;\n\n  return new THREE.Vector3(x, y, 1);\n};\n\n/**\n    *  Converts from viewport coordinates ((-1, 1) is top left) to screen coordinates ((0, 0) is top left)\n    *\n    *  @param {number} x - Viewport X coordinate in [-1, 1] range (left == -1)\n    *  @param {number} y - Viewport Y coordinate in [-1, 1] range (top == 1)\n    *  @return {THREE.Vector2} - Point in screen coordinates (0, 0) is top left, x and y in the range [0, 1]\n    */\nNavigation.prototype.viewportToScreen = function (x, y)\n{\n  // Map to [-1, 1] to [0, 1]\n  x = (x + 1.0) / 2.0;\n  y = (y + 1.0) / 2.0;\n\n  y = 1.0 - y; // Invert Y so 0 == top.\n\n  return new THREE.Vector2(x, y);\n};\n\n/**\n    *  Get a world point from normalized screen coordinates by projecting to the plane at the pivot point.\n    *  @param {number} x - Normalized screen X coordinate in [0, 1] range (left == 0)\n    *  @param {number} y - Normalized screen Y coordinate in [0, 1] range (top == 0)\n    *  @returns {THREE.Vector3} - Point in world space\n    */\nNavigation.prototype.getWorldPoint = function (x, y)\n{\n  /*\n  var x = (mouseX - this.viewport.left) / this.viewport.width;\n  var y = (mouseY - this.viewport.top) / this.viewport.height;\n  */\n  var vpVec = this.screenToViewport(x, y);\n  x = vpVec.x;\n  y = vpVec.y;\n\n  var camera = this.getCamera();\n  var clickPoint;\n\n  if (camera.isPerspective)\n  {\n    clickPoint = new THREE.Vector3(x, y, 1.0);\n    clickPoint = clickPoint.unproject(camera);\n  }\n  var view = this.getEyeVector();\n  var position = this.getPosition();\n  var direction, distance;\n\n  if (!camera.isPerspective || isNaN(clickPoint.x))\n  {\n    // Calculate a point based on the view...\n    var xysize = this.getWorldSize(view.length());\n    var trackX = this.getCameraRightVector(false).multiplyScalar(x * 0.5 * xysize.x);\n    var trackY = this.getCameraUpVector().multiplyScalar(y * 0.5 * xysize.y);\n    direction = view.clone().add(trackX).add(trackY).normalize();\n    // logger.log(\"GWP: ALT(\" + direction.x.toFixed(3) + \", \"+ direction.y.toFixed(3) + \", \"+ direction.z.toFixed(3) + \")\" + x + \", \" + y);\n  } else\n\n  {\n    direction = clickPoint.sub(position).normalize();\n    // logger.log(\"GWP: DIR(\" + direction.x.toFixed(3) + \", \"+ direction.y.toFixed(3) + \", \"+ direction.z.toFixed(3) + \")\");\n  }\n  var pivot = this.getPivotPoint();\n  var denominator = direction.dot(view);\n  // LMV-2582 and LMV-2284\n  // old: var usePivot = this.__pivotIsSetFlag && (this.getIs2D() || (camera.isPerspective && this.isPointVisible(pivot)));\n  var usePivot = this.__pivotIsSetFlag && (this.getIs2D() || camera.isPerspective && denominator > 0.0);\n  if (usePivot)\n  {\n    // get the length along the view direction of the point.\n    distance = denominator !== 0.0 ?\n    Math.abs(pivot.sub(position).dot(view)) / denominator :\n    pivot.sub(position).length();\n  } else\n\n  {\n    distance = camera.isPerspective ? (camera.near + camera.far) * 0.5 :\n    camera.orthoScale;\n  }\n  return direction.multiplyScalar(distance).add(position);\n};\n\n/**\n    * @returns {number} - The perpendicular distance from the camera to the plane containing the pivot point.\n    */\nNavigation.prototype.getPivotPlaneDistance = function ()\n{\n  var pivot = this.getPivotPoint();\n  var view = this.getEyeVector();\n  var position = this.getPosition();\n\n  return pivot.sub(position).dot(view.normalize());\n};\n\n/**\n    * Pan the camera a relative distance up/down or left/right.\n    *  @param {number} deltaX - Normalized X distance to pan left/right (negative/positive).\n    *  @param {number} deltaY - Normalized Y distance to pan down/up (negative/positive).\n    *  @param {number} atDistance - Pan distance is scaled by the size of the view frustum at this distance from the camera.\n    */\nNavigation.prototype.panRelative = function (deltaX, deltaY, atDistance)\n{\n  if (!this.isActionEnabled('pan')) {\n    return;\n  }\n\n  var viewport = this.getScreenViewport();\n  var camera = this.getCamera();\n\n  var trackSpeed = this.getWorldSize(atDistance);\n  var offsetX = deltaX * trackSpeed.x * viewport.width / camera.clientWidth;\n  var offsetY = deltaY * trackSpeed.y * viewport.height / camera.clientHeight;\n\n  var trackX = this.getCameraRightVector(false).multiplyScalar(offsetX);\n  var trackY = this.getCameraUpVector().multiplyScalar(offsetY);\n\n  var offsetVector = trackX.add(trackY);\n\n  // restrict panning if we use 2D mode with constraints\n  this.applyPanningConstraint2D(offsetVector);\n\n  this.setView(this.getPosition().add(offsetVector), this.getTarget().add(offsetVector));\n};\n\n/**\n    * Dolly the camera a distance along the vector from a given point to its current position. The dolly distance is clamped to not go past the point.\n    *  @param {number} distance - World space distance to move the camera by.\n    *  @param {THREE.Vector3} point - World space position used to define the dolly direction.\n    */\nNavigation.prototype.dollyFromPoint = function (distance, point, bounds)\n{\n  if (!this.isActionEnabled('zoom') || Math.abs(distance) <= this.__kEpsilon)\n  return;\n\n  var position = this.getPosition();\n\n  // For orthographic cameras the distance from the target to the eye\n  // determines the zoom. So we need to make sure the dolly point is\n  // is in the plane of the target, projected along the view direction.\n  // If we don't do this, then the target will drift in the view\n  // direction and the zoom to distance calculation is wrong.\n  var viewVec = this.getEyeVector();\n  if (!this.getCamera().isPerspective) {\n    var viewLenSq = viewVec.lengthSq();\n    var projDot = viewVec.dot(this.getTarget().sub(point));\n    point = viewVec.clone().multiplyScalar(projDot / viewLenSq).add(point);\n  }\n\n  var dollyVec = point.clone().sub(position);\n  var oldLength = dollyVec.length();\n  var newLength = oldLength + distance;\n  if (newLength < this.__minDistance)\n  newLength = this.__minDistance;\n\n  var scaleFactor = newLength / oldLength;\n\n  // restrict min/max distance if a viewRegion or maxPixelPerUnit constraint is set.\n  scaleFactor = this.applyDollyConstraint(scaleFactor, bounds);\n\n  if (Math.abs(scaleFactor - 1.0) > this.__kEpsilon)\n  {\n    dollyVec.multiplyScalar(scaleFactor);\n    dollyVec.set(-dollyVec.x, -dollyVec.y, -dollyVec.z);\n    var newPosition = dollyVec.add(point);\n\n    // Compute a new look at point from the new position:\n    var viewVec = this.getEyeVector();\n\n    // For ortho cameras we must scale the view vector to actually\n    // perform an ortho zoom operation:\n    if (!this.getCamera().isPerspective)\n    viewVec.multiplyScalar(scaleFactor);\n\n    this.setView(newPosition, viewVec.add(newPosition));\n  }\n};\n\n/**\n    *  Change current camera to perspective camera.\n    *\n    *  Not applicable to 2D.\n    */\nNavigation.prototype.toPerspective = function ()\n{\n  if (this.getIs2D())\n  {\n    logger.warn(\"Autodesk.Viewing.Navigation.toPerspective is not applicable to 2D\");\n    return;\n  }\n\n  var camera = this.getCamera();\n\n  if (!camera.isPerspective)\n  {\n    camera.toPerspective();\n    camera.dirty = true;\n  }\n};\n\n/**\n    *  Change current camera to orthographic camera\n    */\nNavigation.prototype.toOrthographic = function ()\n{\n  var camera = this.getCamera();\n\n  if (camera.isPerspective)\n  {\n    camera.toOrthographic();\n    camera.dirty = true;\n  }\n};\n\n/** \n    * Helper method that snaps a Vector3 to one of the 3 main orthogonal axis.\n    * @param {THREE.Vector3} v - vector to snap, it gets modified.\n    */\nNavigation.snapToAxis = function (v) {\n  var absv = new THREE.Vector3(Math.abs(v.x), Math.abs(v.y), Math.abs(v.z));\n\n  if (absv.x > absv.y && absv.x > absv.z)\n  v.set(v.x > 0 ? 1 : -1, 0, 0);else\n  if (absv.y > absv.x && absv.y > absv.z)\n  v.set(0, v.y > 0 ? 1 : -1, 0);else\n\n  v.set(0, 0, v.z > 0 ? 1 : -1);\n\n  return v;\n};","\nimport * as et from \"../application/EventTypes\";\nimport { GlobalManagerMixin } from '../application/GlobalManagerMixin';\nimport { Prefs3D } from '../application/PreferenceNames';\n\n// /** @constructor */\n//\n// TODO: Pass in the api instead of the impl, don't use the impl object.\n//\nexport function OrbitDollyPanTool(viewerImpl, viewerApi, config)\n{var _this2 = this;\n  this.setGlobalManager(viewerApi.globalManager);\n\n  var _this = this;\n  var kScreenEpsilon = 0.001;\n  var kEpsilon = 0.01;\n  var kAutoDeltaZ = 1.5; // Dolly increment\n  var kAutoDeltaXY = 0.01;\n  var kAutoScreenXY = 20;\n  var kDollyDragScale = config && config.hasOwnProperty('dollyDragScale') ? config.dollyDragScale : 100.0;\n  var kDollyPinchScale = 0.5;\n  var kOrbitScale = 2.0;\n\n  var isMac = navigator.userAgent.search(\"Mac OS\") != -1;\n  var _isPinchRotationDisabled = config && config.disablePinchRotation;\n\n  var _navapi = viewerApi.navigation;\n  var _camera = _navapi.getCamera();\n  var _names = [\"orbit\", \"freeorbit\", \"dolly\", \"pan\"];\n\n  var _activeMode = _names[0];\n  var _activations = [_activeMode]; // Safeguard\n  var _activatedMode = _activeMode;\n\n  var _touchType = null;\n  var _pinchScale = 1.0;\n  var _prevPinchScale = 1.0;\n  var _prevPinchLength = 0;\n  var _pinchLength = 0;\n  var _deltaRoll = 0.0;\n  var _prevRoll = 0.0;\n\n  var _useCustomCursors = true;\n  var _activeModeLocked = false;\n  var _autoCamStartXY = null;\n  var _interactionActive = false;\n  var _lastMouseX, _lastMouseY;\n\n  var _keys = {\n    SHIFT: 16,\n    CONTROL: 17,\n    ALT: 18,\n    SPACE: 32,\n    PAGEUP: 33,\n    PAGEDOWN: 34,\n    LEFT: 37,\n    UP: 38,\n    RIGHT: 39,\n    DOWN: 40,\n    ZERO: 48,\n    EQUALS: 187,\n    DASH: 189 };\n\n\n  // Interaction Triggers:\n  var kNone = -5;\n  var kKeyboard = -4;\n  var kWheel = -1;\n  var kMouseLeft = 0;\n  var kMouseMiddle = 1;\n  var kMouseRight = 2;\n  var kTouch = 3;\n\n  var _activeTrigger = kNone;\n  var _startXYZ = new THREE.Vector3();\n  var _moveXYZ = new THREE.Vector3();\n  var _touchStartXY = new THREE.Vector2();\n  var _startXY = new THREE.Vector2();\n  var _moveXY = new THREE.Vector2();\n  var _deltaXY = new THREE.Vector2();\n  var _motionDelta = new THREE.Vector3();\n\n  var _rotateStart = new THREE.Vector3();\n  var _rotateEnd = new THREE.Vector3();\n  var _pivotToEye = new THREE.Vector3();\n  var _targetToEye = new THREE.Vector3();\n  var _projVector = new THREE.Vector3();\n  var _objectUp = new THREE.Vector3();\n  var _mouseOnBall = new THREE.Vector3();\n  var _rotateNormal = new THREE.Vector3();\n  var _quaternion = new THREE.Quaternion();\n  var _intersectionPlane = new THREE.Plane();\n  var _noRoll = false;\n  var _staticMoving = true;\n  var _dynamicDampingFactor = 0.2;\n\n  var _autoMove = [false, false, false, false, false, false]; // left, right, up, down, in, out\n  var _modifierState = { SHIFT: 0, ALT: 0, CONTROL: 0, SPACE: 0 };\n\n  this.active = false;\n\n  // Remove rollover effect when mouse is not over the canvas.\n  var _onMouseOut = function _onMouseOut(event) {\n    viewerImpl.renderer().rolloverObjectId(0, null, 0);\n  };\n\n  var kDampingFactor = 0.6;\n  var kLookSpeedDefault = 5.0;\n  var kDollySpeedDefault = 0.025;\n  var kMinDollySpeed = 0.01;\n  var kClosestDistance = 0.0005;\n  var kDollyScale = config && config.hasOwnProperty('dollyScrollScale') ? config.dollyScrollScale : 0.6;\n\n  var _trackingDistance = 1.0;\n  var _boundingBox;\n\n  var myLookSpeed = kLookSpeedDefault;\n  var myDollySpeed = kDollySpeedDefault;\n\n  this.getNames = function ()\n  {\n    return _names;\n  };\n\n  this.getName = function ()\n  {\n    return _names[0];\n  };\n\n  this.activate = function (name)\n  {\n    this.active = true;\n    // avp.logger.log(\"ACTIVATE: \" + _activatedMode + \" => \" + name);\n    _activations.push(name);\n    _activatedMode = name;\n\n    _useCustomCursors = viewerApi.prefs.get(Prefs3D.ENABLE_CUSTOM_ORBIT_TOOL_CURSOR);\n    viewerApi.prefs.addListeners(Prefs3D.ENABLE_CUSTOM_ORBIT_TOOL_CURSOR, this._onPrefCursor);\n\n    viewerImpl.canvas.addEventListener('mouseout', _onMouseOut);\n    viewerApi.addEventListener(et.ESCAPE_EVENT, this.handleBlur);\n  };\n\n  this.deactivate = function (name)\n  {\n    this.active = false;\n\n    viewerApi.prefs.removeListeners(Prefs3D.ENABLE_CUSTOM_ORBIT_TOOL_CURSOR, this._onPrefCursor);\n\n    var end = _activations.length - 1;\n    if (end > 0 && _activations[end] === name)\n    {\n      _activations.pop();\n      _activatedMode = _activations[end - 1];\n\n      // avp.logger.log(\"DEACTIVATE: \" + name + \" => \" + _activatedMode );\n    }\n    viewerImpl.canvas.removeEventListener('mouseout', _onMouseOut);\n    viewerApi.removeEventListener(et.ESCAPE_EVENT, this.handleBlur);\n  };\n\n  this.isActive = function () {\n    return this.active;\n  };\n\n  this.adjustDollyLookSpeed = function (direction)\n  {\n    if (direction === 0)\n    {\n      myDollySpeed = kDollySpeedDefault;\n      myLookSpeed = kLookSpeedDefault;\n    } else\n\n    {\n      myDollySpeed *= direction > 0 ? 1.10 : 0.90;\n      myLookSpeed *= direction > 0 ? 1.10 : 0.90;\n\n      // May need more appropriate minimums (and maximums) here.\n      if (myDollySpeed < 0.000001)\n      myDollySpeed = 0.000001;\n\n      if (myLookSpeed < 0.000001)\n      myLookSpeed = 0.000001;\n    }\n  };\n\n  this.getDollySpeed = function (dollyTarget, isZoomIn)\n  {\n    // Calculate the distance that one unit of virtual dolly will move:\n    var speed;\n    // In order to avoid bugs as described in BLMV-3936, when the zoom is not working properlly in orthoCamera when zooming towards pivot,\n    // We want to compute the speed by orthoScale (which considers the \"distance\" between the camera and it's target)\n    if ((_navapi.getZoomTowardsPivot() || _navapi.getWheelSetsPivot()) && !_camera.isPerspective && !_navapi.getIs2D()) {\n      var distance = _camera.orthoScale * myDollySpeed;\n      speed = Math.abs(distance) < kClosestDistance && isZoomIn ? 0 : distance;\n    } else {\n      var view = _navapi.getEyeVector();\n      var position = _navapi.getPosition();\n      var projectedLength = dollyTarget.clone().sub(position).dot(view.normalize());\n      var distance = projectedLength * myDollySpeed;\n      speed = Math.abs(distance) < kMinDollySpeed ? distance < 0 ? -kMinDollySpeed : kMinDollySpeed : distance;\n    }\n\n    return speed;\n  };\n\n  this.setPivotPointFromInput = function (inputX, inputY) {\n\n    if (_navapi.getIs2D() || !_navapi.getWheelSetsPivot()) {\n      return;\n    }\n\n    var res = viewerImpl.hitTest(inputX, inputY, true);\n    if (res && res.intersectPoint) {\n      this.utilities.setPivotPoint(res.intersectPoint, true, true);\n    } else {\n      // When we don't get an intersection with the model, compute the hitPoint with a plane that is:\n      // Parallel to the current near/far-plane\n      // At the same distance as the previous pivot.\n      var pivot = _navapi.getPivotPoint();\n      var eye = _navapi.getEyeVector().normalize();\n      var dist = -pivot.dot(eye);\n      _intersectionPlane.set(eye, dist);\n\n      var ray = viewerImpl.viewportToRay(viewerImpl.clientToViewport(inputX, inputY));\n      var pos = ray.intersectPlane(_intersectionPlane);\n      this.utilities.setPivotPoint(pos, true, true);\n    }\n  };\n\n  /**\n      * Get the dolly (zoom) scale value which is used for the scroll wheel.\n      * @returns {Number} - dolly scroll scale\n      */\n  this.getDollyScrollScale = function ()\n  {\n    return kDollyScale;\n  };\n\n  /**\n      * Set the dolly (zoom) scale of the scroll wheel.\n      * This value is used to calculate the distance of the camera.\n      * The default value is 0.6.\n      * \n      * @example\n      * // Zoom at a larger scale\n      * viewer.toolController.getTool(\"dolly\").setDollyScrollScale(2);\n      * \n      * // Zoom at a lower scale\n      * viewer.toolController.getTool(\"dolly\").setDollyScrollScale(0.1);\n      * \n      * @param {Number} dollyScale\n      */\n  this.setDollyScrollScale = function (dollyScale)\n  {\n    kDollyScale = dollyScale;\n  };\n\n  /**\n      * Get the dolly (zoom) scale value which is used after enabling the zoom tool and dragging the mouse.\n      * @returns {Number} - dolly drag scale\n      */\n  this.getDollyDragScale = function ()\n  {\n    return kDollyDragScale;\n  };\n\n  /**\n      * Set the dolly (zoom) scale of the zoom tool.\n      * This value is used to calculate the distance of the camera.\n      * The default value is 100.\n      * \n      * @example\n      * // Zoom at a larger scale\n      * viewer.toolController.getTool(\"dolly\").setDollyDragScale(50);\n      * \n      * // Zoom at a lower scale\n      * viewer.toolController.getTool(\"dolly\").setDollyDragScale(200);\n      * \n      * @param {Number} dollyScale\n      */\n  this.setDollyDragScale = function (dollyDragScale)\n  {\n    kDollyDragScale = dollyDragScale;\n  };\n\n  this.getLookSpeed = function ()\n  {\n    return myLookSpeed;\n  };\n\n  this.coiIsActive = function ()\n  {\n    return _navapi.getPivotSetFlag() && _navapi.isPointVisible(_navapi.getPivotPoint());\n  };\n\n  this.adjustSpeed = function (direction)\n  {\n    this.adjustDollyLookSpeed(direction);\n\n    if (this.utilities.autocam)\n    this.utilities.autocam.orbitMultiplier = this.getLookSpeed();\n  };\n\n  this.getTriggeredMode = function ()\n  {\n    // Fusion wants Shift+Middle to go back to orbit\n    if (_activeTrigger === kMouseMiddle && _modifierState.SHIFT)\n    return _activations[1]; // TODO_NOP: return to chosen orbit behavior, don't use _activations\n\n    return isDolly() || _motionDelta.z !== 0.0 ? shouldPanOverrideDolly() ? \"pan\" : \"dolly\" :\n    isTrack() ? \"pan\" :\n    _touchType === 'pan' || _touchType === 'pinch' ? \"dollypan\" :\n    _activatedMode;\n  };\n\n  // TO DO: Where/when do we push/pop tool state?\n  function isTrack()\n  {\n    var mod = _modifierState;\n    return _activeTrigger === kMouseRight && !mod.SHIFT && !(mod.ALT ^ mod.CONTROL) ||\n    _activeTrigger === kMouseRight && mod.SHIFT && mod.CONTROL ||\n    _activeTrigger === kMouseMiddle && !mod.SHIFT && !mod.CONTROL ||\n    _activeTrigger === kMouseMiddle && mod.ALT ||\n    _activeTrigger === kMouseMiddle && mod.CONTROL && !mod.ALT ||\n    _activeTrigger === kMouseLeft && mod.SHIFT && !mod.CONTROL && !mod.ALT ||\n    _activatedMode === \"pan\" && _activeTrigger !== kMouseMiddle && !mod.ALT && !(_touchType === \"pinch\") ||\n    mod.SPACE;\n  }\n\n  function isDolly()\n  {\n    var mod = _modifierState;\n    return _activeTrigger === kMouseRight && mod.SHIFT && !mod.ALT && !mod.CONTROL ||\n    _activeTrigger === kMouseRight && mod.ALT && !mod.SHIFT && !mod.CONTROL ||\n    _activatedMode === \"dolly\" && !mod.ALT && !(_touchType === \"pinch\");\n  }\n\n  function shouldPanOverrideDolly()\n  {\n    var mod = _modifierState;\n    return !mod.CONTROL && !mod.ALT && !mod.SHIFT && (_activeTrigger === kMouseRight || _activeTrigger === kMouseMiddle);\n  }\n\n  this.initTracking = function (x, y)\n  {\n    var distance;\n\n    if (!_camera.isPerspective)\n    {\n      distance = _navapi.getEyeVector().length();\n    } else\n\n    {\n      // Decide what point in world space defines the plane\n      // orthogonal to the view that will be used to track\n      // the camera. If we get an intersection point use it,\n      // otherwise if the pivot point is set use that. The\n      // fallback is to use the mid-point of the view frustum.\n\n      distance = (_camera.near + _camera.far) * 0.5;\n\n      var p = this.utilities.getHitPoint(x, y);\n      var position = _navapi.getPosition();\n      if (p && p.sub)\n      {\n        // Calculate orthogonal distance along view vector:\n        var hitToEye = p.sub(position);\n        var view = _navapi.getEyeVector().normalize();\n        distance = Math.abs(view.dot(hitToEye));\n      } else\n\n      {\n        var usePivot = _navapi.getPivotSetFlag() && _navapi.isPointVisible(_navapi.getPivotPoint());\n        if (usePivot)\n        {\n          var pivotDistance = _navapi.getPivotPlaneDistance();\n          if (pivotDistance > kEpsilon)\n          {\n            distance = pivotDistance;\n          }\n        }\n      }\n    }\n    _trackingDistance = distance;\n  };\n\n  function pivotIsBehind()\n  {\n    if (!_camera.isPerspective)\n    return false;\n\n\n    var pivotVector = _navapi.getPivotPoint().sub(_navapi.getPosition());\n    return pivotVector.dot(_navapi.getEyeVector()) <= 0.0;\n  }\n\n  this.initOrbit = function ()\n  {\n    // If the pivot point is behind us we pivot around the center of the view:\n    this.utilities.setTemporaryPivot(pivotIsBehind() ? _navapi.getTarget() : null);\n  };\n\n  this.getActiveMode = function ()\n  {\n    return _activeMode;\n  };\n\n  this.getCursor = function ()\n  {\n    if (!_useCustomCursors)\n    return null;\n\n    switch (_activeMode) {\n\n      case \"freeorbit\":\n      case \"orbit\":\n        return 'url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAMAAADXqc3KAAAAt1BMVEUAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAD///8AAAAzMzP6+vri4uISEhKKioqtra2dnZ2EhIR9fX10dHRkZGQdHR3t7e3Hx8e5ubm1tbWoqKhWVlZKSko4ODgICAjv7+/o6OjMzMyxsbFOTk4pKSkXFxcEBAT29vbW1tZ6enpISEgLCwvhzeX+AAAAGXRSTlMANRO0nHRJHfnskIxQRKh89syDVwTWZjEJxPFEswAAAOFJREFUKM+1j+lygkAQhIflEAJe0Rw9u4CCeKKoSTTX+z9XoMJWWeX+ssrvZ3f19DQ5zOw/0DUMQPlmQ72bE2adBp8/Rp3CQUi3ILx+bxj4fjDs9T1Bmo6bbPPN8aDU4bjJt4nb+de789kSFyxn826jW3ICLNZZKU8nWWbrBTCRVm04U8TpjquRFf1Go0d7l8aYOrUR7FGEFr1S9LGymwthgX2gE/Kl0cHPOtF2xOWZ5QpIC93RflW4InkDoPRXesd5LJIMQPzV7tCMa7f6BvhJL79AVDmYTNQ1NhnxbI/uwB8H5Bjd4zQPBAAAAABJRU5ErkJggg==), auto';\n\n      case \"dolly\":\n        return \"url(data:image/png;base64,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), auto\";\n\n      case \"pan\":\n        return \"url(data:image/png;base64,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), auto\";}\n\n    return null;\n  };\n\n  this.getMotionDelta = function (dxyz, dxy)\n  {\n    // Add any offset triggered by key controls:\n    // TODO: Change these to scale based on real time so fast frame\n    // rate doesn't cause super fast motion.\n\n    var autoDeltaZ = _navapi && _navapi.getReverseZoomDirection() ? -kAutoDeltaZ : kAutoDeltaZ;\n    if (isMac)\n    autoDeltaZ *= -1; // Match the \"natural\" scroll direction on Mac.\n\n    if (_autoMove[0]) {_moveXYZ.x += kAutoDeltaXY;_moveXY.x += kAutoScreenXY;}\n    if (_autoMove[1]) {_moveXYZ.x -= kAutoDeltaXY;_moveXY.x -= kAutoScreenXY;}\n    if (_autoMove[2]) {_moveXYZ.y += kAutoDeltaXY;_moveXY.y += kAutoScreenXY;}\n    if (_autoMove[3]) {_moveXYZ.y -= kAutoDeltaXY;_moveXY.y -= kAutoScreenXY;}\n    if (_autoMove[4]) {_moveXYZ.z += autoDeltaZ;}\n    if (_autoMove[5]) {_moveXYZ.z -= autoDeltaZ;}\n\n    var deltaX = _moveXYZ.x - _startXYZ.x;\n    var deltaY = _moveXYZ.y - _startXYZ.y;\n    var deltaZ = _moveXYZ.z - _startXYZ.z;\n\n    if (Math.abs(deltaX) < kScreenEpsilon) deltaX = 0.0;\n    if (Math.abs(deltaY) < kScreenEpsilon) deltaY = 0.0;\n    if (Math.abs(deltaZ) < kScreenEpsilon) deltaZ = 0.0;\n\n    dxyz.set(deltaX, deltaY, deltaZ);\n\n    if (dxy)\n    {\n      dxy.set(_moveXY.x - _startXY.x, _moveXY.y - _startXY.y);\n    }\n  };\n\n  this.stepMotionDelta = function (delta, damped)\n  {\n    if (damped)\n    {\n      _startXYZ.x += delta.x * kDampingFactor;\n      _startXYZ.y += delta.y * kDampingFactor;\n      _startXYZ.z += delta.z * kDampingFactor;\n    } else\n\n    _startXYZ.copy(_moveXYZ);\n\n    _startXY.copy(_moveXY);\n  };\n\n  function getMouseProjectionOnBall(pageX, pageY)\n  {\n    var _window = _this.getWindow();\n    var viewport = { left: 0, top: 0, width: _window.innerWidth, height: _window.innerHeight };\n\n    _mouseOnBall.set(\n    (pageX - viewport.width * 0.5 - viewport.left) / (viewport.width * 0.5),\n    (viewport.height * 0.5 + viewport.top - pageY) / (viewport.height * 0.5),\n    0.0);\n\n\n    var length = _mouseOnBall.length();\n    if (_noRoll)\n    {\n      if (length < Math.SQRT1_2)\n      {\n        _mouseOnBall.z = Math.sqrt(1.0 - length * length);\n      } else\n\n      {\n        _mouseOnBall.z = .5 / length;\n      }\n    } else\n    if (length > 1.0)\n    {\n      _mouseOnBall.normalize();\n    } else\n\n    {\n      _mouseOnBall.z = Math.sqrt(1.0 - length * length);\n    }\n    _pivotToEye.copy(_camera.position).sub(_camera.pivot);\n    _projVector.copy(_camera.up).setLength(_mouseOnBall.y);\n    _projVector.add(_objectUp.copy(_camera.up).cross(_pivotToEye).setLength(_mouseOnBall.x));\n    _projVector.add(_pivotToEye.setLength(_mouseOnBall.z));\n    return _projVector;\n  }\n\n  function freeOrbit()\n  {\n    if (!_navapi.isActionEnabled('orbit')) {\n      return;\n    }\n\n    _pivotToEye.subVectors(_camera.position, _camera.pivot);\n    _targetToEye.subVectors(_camera.position, _camera.target);\n    var targetDist = _targetToEye.length();\n    _targetToEye.normalize();\n\n    var angle = Math.acos(_rotateStart.dot(_rotateEnd) / _rotateStart.length() / _rotateEnd.length());\n    if (angle)\n    {\n      angle *= kOrbitScale;\n      _rotateNormal.crossVectors(_rotateStart, _rotateEnd).normalize();\n      _quaternion.setFromAxisAngle(_rotateNormal, -angle);\n\n      _pivotToEye.applyQuaternion(_quaternion);\n      _camera.up.applyQuaternion(_quaternion);\n      _rotateEnd.applyQuaternion(_quaternion);\n      _targetToEye.applyQuaternion(_quaternion);\n\n      if (_staticMoving)\n      {\n        _rotateStart.copy(_rotateEnd);\n      } else\n\n      {\n        _quaternion.setFromAxisAngle(_rotateNormal, angle * (_dynamicDampingFactor - 1.0));\n        _rotateStart.applyQuaternion(_quaternion);\n      }\n    }\n\n    _camera.position.addVectors(_camera.pivot, _pivotToEye);\n    _camera.target.subVectors(_camera.position, _targetToEye.multiplyScalar(targetDist));\n    _camera.dirty = true;\n  }\n\n  this.getFitBounds = function ()\n  {\n    if (this.utilities.viewerImpl.zoomBoundsChanged) {\n      _boundingBox = this.utilities.viewerImpl.getVisibleBounds(true);\n      this.utilities.viewerImpl.zoomBoundsChanged = false;\n    }\n\n    return _boundingBox;\n  };\n\n  this.update = function ()\n  {\n    var wheelEnded = false;\n    var updatePivot = false;\n    var viewport;\n\n    this.getMotionDelta(_motionDelta, _deltaXY);\n\n    var deltaX = _motionDelta.x;\n    var deltaY = _motionDelta.y;\n    var deltaZ = _motionDelta.z;\n\n    if (!_activeModeLocked)\n    this.checkInteractionMode();\n\n    _activeModeLocked = _activeTrigger > kWheel;\n\n    if (_activeModeLocked)\n    this.controller.setIsLocked(true);\n\n    if (deltaX !== 0.0 || deltaY !== 0.0 || deltaZ !== 0.0)\n    {\n      switch (_activeMode) {\n\n        case \"orbit\":\n          if (this.utilities.autocam && this.utilities.autocam.startState)\n          {\n            _deltaXY.x = -_deltaXY.x;\n            if (_autoCamStartXY)\n            this.utilities.autocam.orbit(_moveXY, _autoCamStartXY, _deltaXY.multiplyScalar(kOrbitScale), this.utilities.autocam.startState);\n          }\n          break;\n\n        case \"freeorbit\":\n          freeOrbit();\n          break;\n\n        case \"dolly\":\n          var dollyTarget;\n          var screen = new THREE.Vector2();\n\n          deltaZ *= kDollyScale;\n\n          if (_activeTrigger >= kMouseLeft)\n          {\n            // Map XY movement to Z:\n            deltaY = -deltaY; // Invert Y\n            deltaZ = Math.abs(deltaX) > Math.abs(deltaY) ? deltaX : deltaY;\n\n            if (_navapi.getReverseZoomDirection()) {\n              deltaZ *= -1;\n            }\n\n            deltaZ *= kDollyDragScale;\n            deltaX = 0.0;\n            deltaY = 0.0;\n\n            // Towards center of viewport:\n            screen = _navapi.viewportToScreen(0, 0);\n          } else\n\n          {\n            // Towards cursor position:\n            viewport = _navapi.getScreenViewport();\n            if (_lastMouseX && _lastMouseY)\n            {\n              screen.x = _lastMouseX / viewport.width;\n              screen.y = _lastMouseY / viewport.height;\n            } else\n\n            {\n              screen = _navapi.viewportToScreen(0, 0);\n            }\n          }\n          if (!_navapi.getIs2D() && _navapi.getZoomTowardsPivot())\n          {\n            if (!this.coiIsActive())\n            {\n              // Center of viewport if pivot is not active\n              screen = _navapi.viewportToScreen(0, 0);\n              dollyTarget = _navapi.getWorldPoint(screen.x, screen.y);\n            } else\n\n            dollyTarget = _navapi.getPivotPoint();\n          } else\n\n          dollyTarget = _navapi.getWorldPoint(screen.x, screen.y);\n\n          _navapi.dollyFromPoint(deltaZ * this.getDollySpeed(dollyTarget, deltaZ < 0), dollyTarget, this.getFitBounds());\n          break;\n\n        case \"pan\":\n          // Moving camera down/left moves the model up/right:\n          _navapi.panRelative(-deltaX, deltaY, _trackingDistance);\n          break;\n\n        case \"dollypan\":\n\n          if (deltaX !== 0.0 || deltaY !== 0.0)\n          _navapi.panRelative(-deltaX, deltaY, _trackingDistance);\n\n          // Towards cursor position:\n          viewport = _navapi.getScreenViewport();\n          dollyTarget = _navapi.getWorldPoint(_lastMouseX / viewport.width, _lastMouseY / viewport.height);\n\n          var position = _navapi.getPosition();\n          var distance = _navapi.getIs2D() ? position.sub(dollyTarget).length() : _trackingDistance;\n          var touchScale = _prevPinchLength / _pinchLength - 1;\n\n          var distanceDelta = touchScale * distance;\n\n          _navapi.dollyFromPoint(distanceDelta, dollyTarget, this.getFitBounds());\n\n          var vview = new THREE.Vector3();\n          var qrotate = new THREE.Quaternion();\n\n          var up = _navapi.getCameraUpVector();\n          var view = vview.copy(_camera.position).sub(_camera.target).normalize();\n          qrotate.setFromAxisAngle(view, _deltaRoll * 1.2);\n          up.applyQuaternion(qrotate);\n\n          if (!_navapi.getIs2D() && !(_isPinchRotationDisabled && (_touchType === 'pinch' || _touchType === 'pan')))\n          _navapi.setCameraUpVector(up);\n\n          _prevPinchLength = _pinchLength;\n          _prevPinchScale = _pinchScale;\n          _trackingDistance = distance + distanceDelta;\n          break;}\n\n      updatePivot = true;\n    }\n    this.stepMotionDelta(_motionDelta, _activeMode !== \"pan\" && _activeMode !== 'dollypan');\n\n    // If a wheel event triggered this we've now handled it,\n    if (_activeTrigger === kWheel && Math.abs(deltaZ) < kEpsilon)\n    {\n      this.interactionEnd(kWheel);\n\n      //Clamp the motion vector to zero too, so that motion stops.\n      //Otherwise zooming continues in tiny deltas that prevent\n      //progressive repaint from starting.\n      _moveXYZ.z = 0;\n      _startXYZ.z = 0;\n\n      wheelEnded = true;\n      updatePivot = true;\n    }\n\n    // Show pivot if a clutch key is being held.\n    if ((_modifierState.SHIFT || _modifierState.ALT) && _names.indexOf(viewerApi.getActiveNavigationTool()) !== -1) {\n      updatePivot = true;\n    }\n\n    // If the interaction has \"ended\" we can now forget the trigger.\n    if (!_interactionActive && (wheelEnded || _activeTrigger > kNone))\n    {\n      if (_activeTrigger > kWheel)\n      {\n        // Kill any ongoing damped motion if we aren't using\n        // the wheel.\n        _startXYZ.copy(_moveXYZ);\n\n        this.utilities.removeTemporaryPivot();\n      }\n      this.utilities.autocam.endInteraction();\n      _activeTrigger = kNone;\n      if (_activeModeLocked)\n      this.controller.setIsLocked(false);\n      _activeModeLocked = false;\n      _autoCamStartXY = null;\n      _touchType = null;\n    }\n    if (updatePivot)\n    this.utilities.pivotActive(_navapi.getPivotSetFlag(), _activeTrigger <= kWheel);else\n\n    this.utilities.pivotUpdate();\n\n    return _camera.dirty;\n  };\n\n\n  this.checkInteractionMode = function ()\n  {\n    var newMode = this.getTriggeredMode();\n\n    if (newMode !== _activeMode)\n    {\n      _activeMode = newMode;\n\n      if (_activeMode === \"pan\" && _activeTrigger > kWheel || _activeMode === \"dollypan\")\n      this.initTracking(_startXYZ.x, _startXYZ.y);\n    }\n  };\n\n  this.interactionStart = function (trigger, force)\n  {\n    // Just a simple way to give device input a sort of priority\n    // so we don't have to track all active triggers. Just remember\n    // the most recent with highest \"priority\".\n    if (force || trigger > _activeTrigger)\n    {\n      // Perhaps we need to remember the modifier keys now.\n      _activeTrigger = trigger;\n      _interactionActive = true;\n\n      if (trigger > kWheel)\n      {\n        if (_activeMode === \"pan\")\n        this.initTracking(_startXYZ.x, _startXYZ.y);\n\n        if (_activeMode === \"orbit\")\n        this.initOrbit();\n      }\n      !_navapi.getSelectionSetsPivot() && this.utilities.pivotActive(_navapi.getPivotSetFlag(), trigger === kWheel);\n\n      if (this.utilities.autocam)\n      {\n        this.utilities.autocam.sync(_camera);\n        this.utilities.autocam.startInteraction(_startXY.x, _startXY.y);\n        _autoCamStartXY = _startXY.clone();\n      }\n    }\n  };\n\n  this.interactionCheck = function ()\n  {\n    // Restart keyboard interaction if certain keys are still down:\n    //\n    if (_autoMove[0] ||\n    _autoMove[1] ||\n    _autoMove[2] ||\n    _autoMove[3] ||\n    _autoMove[4] ||\n    _autoMove[5] ||\n    _modifierState.SHIFT ||\n    _modifierState.CONTROL ||\n    _modifierState.ALT ||\n    _modifierState.SPACE) this.interactionStart(kKeyboard, true);\n  };\n\n  this.interactionEnd = function (trigger)\n  {\n    if (trigger === _activeTrigger)\n    {\n      if (trigger !== kWheel)\n      this.utilities.pivotActive(false);\n\n      // We have to leave the _activeTrigger set until the\n      // next update occurs so the update will apply the correct\n      // operation.\n      _interactionActive = false;\n    }\n  };\n\n  this.isInteractionActive = function () {\n    return _interactionActive;\n  };\n\n  // ------------------------\n  // Event handler callbacks:\n  // These can use \"this\".\n\n\n  this.handleWheelInput = function (delta, event)\n  {\n    _lastMouseX = event.canvasX;\n    _lastMouseY = event.canvasY;\n\n    if (this.isDragging)\n    return false;\n\n    //Auto-update the center of zoom (pivot) to center on the cursor\n    //on mouse wheel.\n    if (_navapi.getIs2D()) {\n      // TODO: Perhaps this should be in the update method\n      // to avoid unnecessary calls.\n      var viewport = _navapi.getScreenViewport();\n      var point = viewerImpl.intersectGround(_lastMouseX + viewport.width, _lastMouseY + viewport.height);\n      this.utilities.setPivotPoint(point, true, true);\n    } else {\n      this.setPivotPointFromInput(_lastMouseX, _lastMouseY);\n    }\n\n    if (_navapi.getReverseZoomDirection())\n    delta *= -1;\n\n    _moveXYZ.z += delta;\n\n    if (delta != 0.0)\n    this.interactionStart(kWheel);\n\n    return true;\n  };\n\n  this.resetKeys = function ()\n  {\n    // Turn off any auto motion that may be stuck due to lost focus\n    this.autoMove(-1, false);\n\n    // Clear modifier states:\n    _modifierState.SHIFT = 0;\n    _modifierState.CONTROL = 0;\n    _modifierState.ALT = 0;\n    _modifierState.SPACE = 0;\n  };\n\n  this.autoMove = function (index, state)\n  {\n    if (!state || !this.isDragging)\n    {\n      if (index < 0)\n      _autoMove[0] =\n      _autoMove[1] =\n      _autoMove[2] =\n      _autoMove[3] =\n      _autoMove[4] =\n      _autoMove[5] = state;else\n\n      _autoMove[index] = state;\n\n      if (!state)\n      this.interactionEnd(kKeyboard);\n\n      this.interactionCheck();\n    }\n  };\n\n  this.updateModifierState = function (event)\n  {\n    /* See SPK-930 and SPK-928\n    _modifierState.CONTROL = ((isMac && event.metaKey) || (!isMac && event.ctrlKey)) ? 1 : 0;\n     */\n    _modifierState.CONTROL = isMac && event.metaKey || event.ctrlKey ? 1 : 0;\n    _modifierState.SHIFT = event.shiftKey ? 1 : 0;\n    _modifierState.ALT = event.altKey ? 1 : 0;\n  };\n\n  this.handleKeyDown = function (event, keyCode)\n  {\n    this.updateModifierState(event);\n    var handled = false;\n\n    switch (keyCode) {\n\n      case _keys.EQUALS:this.adjustSpeed(1);handled = true;break;\n      case _keys.DASH:this.adjustSpeed(-1);handled = true;break;\n      case _keys.ZERO:this.adjustSpeed(0);handled = true;break; // Reset dolly speed to default\n\n      case _keys.LEFT:this.autoMove(0, true);handled = true;break;\n      case _keys.RIGHT:this.autoMove(1, true);handled = true;break;\n      case _keys.PAGEUP:this.autoMove(2, true);handled = true;break;\n      case _keys.PAGEDOWN:this.autoMove(3, true);handled = true;break;\n      case _keys.UP:this.autoMove(4, true);handled = true;break;\n      case _keys.DOWN:this.autoMove(5, true);handled = true;break;\n\n      default:\n        return false;}\n\n    if (!this.isDragging)\n    this.interactionStart(kKeyboard);\n\n    return handled;\n  };\n\n  this.handleKeyUp = function (event, keyCode)\n  {\n    this.updateModifierState(event);\n    var handled = false;\n\n    switch (keyCode) {\n\n      case _keys.LEFT:this.autoMove(0, false);handled = true;break;\n      case _keys.RIGHT:this.autoMove(1, false);handled = true;break;\n      case _keys.PAGEUP:this.autoMove(2, false);handled = true;break;\n      case _keys.PAGEDOWN:this.autoMove(3, false);handled = true;break;\n      case _keys.UP:this.autoMove(4, false);handled = true;break;\n      case _keys.DOWN:this.autoMove(5, false);handled = true;break;\n\n      default:\n        return false;}\n\n    if (handled)\n    {\n      this.interactionEnd(kKeyboard);\n\n      if (!_interactionActive)\n      this.interactionCheck();\n    }\n    return handled;\n  };\n\n  function endsWith(str, suffix)\n  {\n    return str.indexOf(suffix, str.length - suffix.length) !== -1;\n  }\n\n  function fingerSeparation(event)\n  {\n    var dx = event.pointers[1].clientX - event.pointers[0].clientX;\n    var dy = event.pointers[1].clientY - event.pointers[0].clientY;\n    return Math.sqrt(dx * dx + dy * dy);\n  }\n\n  this.handleDollyPan = function (event)\n  {\n    _lastMouseX = event.canvasX;\n    _lastMouseY = event.canvasY;\n\n    var viewport = _navapi.getScreenViewport();\n    _moveXY.x = _lastMouseX;\n    _moveXY.y = _lastMouseY;\n    _moveXYZ.x = _moveXY.x / viewport.width;\n    _moveXYZ.y = _moveXY.y / viewport.height;\n\n    _pinchLength = fingerSeparation(event);\n\n    var roll = THREE.Math.degToRad(event.rotation);\n    _deltaRoll = roll - _prevRoll;\n    if (Math.abs(_deltaRoll) > 1.0)\n    _deltaRoll = 0;\n    _prevRoll = roll;\n\n    if (endsWith(event.type, \"start\"))\n    {\n      _prevPinchLength = _pinchLength;\n      _prevPinchScale = 1.0;\n      _deltaRoll = 0;\n      _prevRoll = roll;\n    }\n\n    _pinchScale = event.scale;\n  };\n\n  this.handleGesture = function (event)\n  {\n    switch (event.type) {\n\n      case \"dragstart\":\n        _touchType = \"drag\";\n        // Single touch, fake the mouse for now...\n        return this.handleButtonDown(event, 0);\n\n      case \"dragmove\":\n        if (_touchType !== \"drag\") {\n          this.handleButtonDown(event, 0);\n          _touchType = \"drag\";\n        }\n        return this.handleMouseMove(event);\n\n      case \"dragend\":\n        // We seem to often get a lone dragend after a multi-touch.\n        if (_touchType === \"drag\")\n        {\n          this.handleButtonUp(event, 0);\n          _touchType = null;\n          return true;\n        }\n        return false;\n\n\n      case \"panstart\":\n        _touchType = \"pan\";\n        this.handlePanStart(event);\n        this.handleDollyPan(event);\n        return true;\n\n      case \"panmove\":\n        if (_touchType !== \"pan\") {\n          _touchType = \"pan\";\n          this.handlePanStart(event);\n        }\n        return this.handleDollyPan(event);\n\n      case \"panend\":\n        if (_touchType === \"pan\")\n        {\n          this.isDragging = false;\n          this.handleDollyPan(event);\n          this.interactionEnd(kTouch);\n          return true;\n        }\n        return false;\n\n\n      case \"pinchstart\":\n\n        this.setPivotPointFromInput(event.center.x, event.center.y);\n\n        this.isDragging = true;\n        _touchType = \"pinch\";\n\n        _startXYZ.x = (event.normalizedX + 1.0) * 0.5;\n        _startXYZ.y = 1.0 - (event.normalizedY + 1.0) * 0.5;\n\n        _touchStartXY.set(event.canvasX, event.canvasY);\n        _startXY.set(event.canvasX, event.canvasY);\n\n        _activeModeLocked = false;\n        this.interactionStart(kTouch);\n        this.handleDollyPan(event);\n        return true;\n\n      case \"pinchmove\":\n        return _touchType === \"pinch\" ? this.handleDollyPan(event) : false;\n\n      case \"pinchend\":\n        if (_touchType === \"pinch\")\n        {\n          this.isDragging = false;\n          this.handleDollyPan(event);\n          this.interactionEnd(kTouch);\n          return true;\n        }\n        return false;}\n\n    return false;\n  };\n\n  this.handleButtonDown = function (event, button)\n  {\n    this.updateModifierState(event);\n\n    _startXYZ.x = (event.normalizedX + 1.0) * 0.5;\n    _startXYZ.y = 1.0 - (event.normalizedY + 1.0) * 0.5;\n\n    _startXY.set(event.canvasX, event.canvasY);\n    _moveXYZ.copy(_startXYZ);\n    _moveXY.copy(_startXY);\n\n    _rotateStart.copy(getMouseProjectionOnBall(event.canvasX, event.canvasY));\n    _rotateEnd.copy(_rotateStart);\n\n    _lastMouseX = event.canvasX;\n    _lastMouseY = event.canvasY;\n\n    this.isDragging = true;\n\n    this.interactionStart(button);\n    return true;\n  };\n\n  this.handlePanStart = function (event) {\n    this.isDragging = true;\n\n    _startXYZ.x = (event.normalizedX + 1.0) * 0.5;\n    _startXYZ.y = 1.0 - (event.normalizedY + 1.0) * 0.5;\n\n    _touchStartXY.set(event.canvasX, event.canvasY);\n    _startXY.set(event.canvasX, event.canvasY);\n\n    this.interactionStart(kTouch);\n    return true;\n  };\n\n  this.handleButtonUp = function (event, button)\n  {\n    this.updateModifierState(event);\n\n    _moveXYZ.x = (event.normalizedX + 1.0) * 0.5;\n    _moveXYZ.y = 1.0 - (event.normalizedY + 1.0) * 0.5;\n    _moveXY.set(event.canvasX, event.canvasY);\n\n    _rotateEnd.copy(getMouseProjectionOnBall(event.canvasX, event.canvasY));\n    _rotateStart.copy(_rotateEnd);\n\n    _lastMouseX = event.canvasX;\n    _lastMouseY = event.canvasY;\n\n    this.interactionEnd(button);\n\n    this.isDragging = false;\n    return true;\n  };\n\n  this.handleMouseMove = function (event)\n  {\n    this.updateModifierState(event);\n\n    //Handles non-dragging mouse move over the canvas.\n    //Updates the last known mouse point for\n    //using during mouse wheel (as zoom center) and\n    //will eventually be needed for mouse over highlighting\n    if (!this.isDragging)\n    {\n      _startXYZ.x = (event.normalizedX + 1.0) * 0.5;\n      _startXYZ.y = 1.0 - (event.normalizedY + 1.0) * 0.5;\n\n      _startXY.set(event.canvasX, event.canvasY);\n      _moveXYZ.x = _startXYZ.x;\n      _moveXYZ.y = _startXYZ.y;\n      _moveXY.copy(_startXY);\n\n      _lastMouseX = event.canvasX;\n      _lastMouseY = event.canvasY;\n\n      // mouse over highlighting\n      // TODO: Perhaps this should be in the update method\n      // to avoid unnecessary calls.\n      if (event.target === viewerImpl.canvas)\n      {\n        viewerImpl.rolloverObject(_lastMouseX, _lastMouseY);\n      }\n\n      return false;\n    }\n    _moveXYZ.x = (event.normalizedX + 1.0) * 0.5;\n    _moveXYZ.y = 1.0 - (event.normalizedY + 1.0) * 0.5;\n    _moveXY.set(event.canvasX, event.canvasY);\n\n    _rotateEnd.copy(getMouseProjectionOnBall(event.canvasX, event.canvasY));\n\n    _lastMouseX = event.canvasX;\n    _lastMouseY = event.canvasY;\n\n    return true;\n  };\n\n  this.handleBlur = function (event) {\n    // Reset things when we lose focus...\n    _this2.resetKeys();\n    _this2.interactionEnd(_activeTrigger);\n  };\n\n  // private\n  this._onPrefCursor = function (value) {\n    _useCustomCursors = value;\n  }.bind(this);\n\n\n}\n\nGlobalManagerMixin.call(OrbitDollyPanTool.prototype);","export var SelectionType = {\n  MIXED: 1,\n  REGULAR: 2,\n  OVERLAYED: 3 };","\nimport { SelectionMode } from \"../wgs/scene/SelectionMode\";\nimport { SelectionType } from './SelectionType';\nimport { errorCodeString, ErrorCodes } from \"../file-loaders/net/ErrorCodes\";\nimport { logger } from \"../logger/Logger\";\nimport * as et from \"../application/EventTypes\";\nimport * as THREE from \"three\";\n\n/**\n                                 * The selector class doesn't fire any events.\n                                 * All events get fired by the MultiSelector class, instead.\n                                 * \n                                 * @param {*} viewer \n                                 * @param {*} model \n                                 */\nexport function Selector(viewer, model) {\n\n  //Selection support\n  var _this = this;\n  this.selectedObjectIds = {}; // Stores selectionType per dbId (or 0 if not selected)\n  this.selectionCount = 0;\n  this.selectionMode = SelectionMode.LEAF_OBJECT;\n  this.lockedNodes = []; // Keep track of the locked dbIds\n\n  var selectedParentMap = {};\n\n  function getInstanceTree() {\n    return model.getData().instanceTree;\n  }\n\n  function unmarkObject(dbId) {\n\n    var it = getInstanceTree();\n\n    if (selectedParentMap[dbId] > 0) {\n      selectedParentMap[dbId]--;\n      if (selectedParentMap[dbId] == 0) {\n        viewer.highlightObjectNode(model, dbId, false);\n      }\n\n    } else if (selectedParentMap[dbId] < 0) {\n      throw \"Selection State machine broken. Negatively selected object!\";\n    }\n\n    if (it) {\n      it.enumNodeChildren(dbId, function (childId) {\n        unmarkObject(childId);\n      }, false);\n    }\n  }\n\n\n  function markObject(dbId, isChild, selectionType) {\n\n    var it = getInstanceTree();\n\n    if (selectedParentMap[dbId]) {\n      selectedParentMap[dbId]++;\n    } else {\n      switch (selectionType) {\n        default:\n        case SelectionType.MIXED:\n          viewer.highlightObjectNode(model, dbId, true, isChild);\n          break;\n        case SelectionType.REGULAR:\n          viewer.highlightObjectNode(model, dbId, true, true);\n          break;\n        case SelectionType.OVERLAYED:\n          viewer.highlightObjectNode(model, dbId, true, false);\n          break;}\n\n      selectedParentMap[dbId] = 1;\n    }\n\n    if (it) {\n      it.enumNodeChildren(dbId, function (childId) {\n        markObject(childId, true, selectionType);\n      }, false);\n    }\n  }\n\n  function isSelected(dbId) {\n\n    if (dbId !== undefined && _this.selectedObjectIds[dbId])\n    return true;\n  }\n\n\n  function select(dbId, selectionType) {\n    // Make sure that the node selection is not turned on.\n    var isLocked = _this.isNodeSelectionLocked(dbId);\n    if (isLocked) return;\n    var it = getInstanceTree();\n    selectionType = selectionType || SelectionType.MIXED;\n\n    if (it) {\n      dbId = it.findNodeForSelection(dbId, _this.selectionMode);\n      if (!it.isNodeSelectable(dbId))\n      return;\n    }\n\n    var found = isSelected(dbId);\n    if (!found) {\n      _this.selectedObjectIds[dbId] = selectionType;\n      _this.selectionCount++;\n      markObject(dbId, false, selectionType);\n    }\n  }\n\n  function deselect(dbId) {\n\n    var found = isSelected(dbId);\n    if (found) {\n      unmarkObject(dbId);\n      _this.selectedObjectIds[dbId] = 0;\n      _this.selectionCount--;\n    }\n  }\n\n  function selectionIsEqual(dbNodeArray) {\n    if (_this.selectionCount !== dbNodeArray.length)\n    return false;\n\n    for (var i = 0; i < dbNodeArray.length; i++) {\n      if (!isSelected(dbNodeArray[i]))\n      return false;\n    }\n    return true;\n  }\n\n\n  this.getInstanceTree = getInstanceTree;\n\n  // @returns {boolean} true when a part of the model is selected\n  this.hasSelection = function () {\n    return _this.selectionCount > 0;\n  };\n\n  this.getSelectionLength = function () {\n    return _this.selectionCount;\n  };\n\n\n  this.getSelection = function () {\n    var ret = [];\n    var sset = _this.selectedObjectIds;\n    for (var p in sset) {\n      if (sset[p]) {\n        var dbId = parseInt(p);\n        ret.push(dbId);\n      }\n    }\n\n    return ret;\n  };\n\n  this.isSelected = function (dbId) {\n    return isSelected(dbId);\n  };\n\n  this.clearNodeSelection = function (dbId) {\n    if (dbId === undefined || this.selectionCount === 0) return false;\n    unmarkObject(dbId);\n    delete _this.selectedObjectIds[dbId];\n    return true;\n  };\n\n  this.clearSelection = function (nofire) {\n    if (this.selectionCount > 0) {\n      var sset = _this.selectedObjectIds;\n      for (var p in sset) {\n        var dbId = parseInt(p);\n        if (dbId !== undefined)\n        unmarkObject(dbId);\n      }\n      _this.selectedObjectIds = {};\n      _this.selectionCount = 0;\n      return true;\n    }\n  };\n\n  this.deselectInvisible = function () {\n    var changed = false;\n\n    var sset = _this.selectedObjectIds;\n    var visMan = viewer.visibilityManager;\n    for (var p in sset) {\n      var dbId = parseInt(p);\n      if (dbId && !visMan.isNodeVisible(model, dbId)) {\n        deselect(dbId);\n        changed = true;\n      }\n    }\n\n    return changed;\n  };\n\n\n  // TODO: Optimize this so both select and toggleSelection don't have to lookup the node index.\n  this.toggleSelection = function (dbId, selectionType) {\n\n    if (!dbId) {\n      logger.error(\"Attempting to select node 0.\", errorCodeString(ErrorCodes.VIEWER_INTERNAL_ERROR));\n      return;\n    }\n\n    if (!isSelected(dbId)) {\n      select(dbId, selectionType);\n    } else {\n      deselect(dbId);\n    }\n  };\n\n\n  this.setSelectionMode = function (mode) {\n    this.clearSelection(true);\n    this.selectionMode = mode;\n  };\n\n  this.isNodeSelectionLocked = function (dbId) {\n    if (dbId === -1) return false;\n    var instanceTree = getInstanceTree();\n    if (instanceTree) {\n      return instanceTree.isNodeSelectionLocked(dbId);\n    } else {\n      // Hypothetically, the logic for selection locking can be removed from InstanceTree.js \n      // This approach can be used for models that do contain an instance tree.\n      return _this.lockedNodes.indexOf(dbId) !== -1;\n    }\n\n  };\n\n  this.lockSelection = function (nodeList, locked) {\n    var instanceTree = getInstanceTree();\n    nodeList = Array.isArray(nodeList) ? nodeList : [nodeList];\n\n    function updateLock(dbId, locked) {\n      if (!dbId || dbId === -1) return;\n      if (locked) {\n        if (_this.lockedNodes.indexOf(dbId) === -1) {\n          _this.lockedNodes.push(dbId);\n          _this.clearNodeSelection(dbId);\n        }\n      } else {\n        var index = _this.lockedNodes.indexOf(dbId);\n        _this.lockedNodes.splice(index, 1);\n      }\n    }\n\n    if (instanceTree) {\n      nodeList.forEach(function (node) {\n        instanceTree.enumNodeChildren(\n        node,\n        function (dbId) {\n          instanceTree.lockNodeSelection(dbId, false);\n          updateLock(dbId, locked);\n          if (locked) {\n            instanceTree.lockNodeSelection(dbId, locked);\n          }\n        },\n        true);\n\n      });\n    } else {\n      // For models that do not contain an instance tree.\n      nodeList.forEach(function (dbId) {\n        updateLock(dbId, locked);\n      });\n    }\n  };\n\n  this.setSelection = function (dbNodeArray, selectionType) {\n    if (selectionIsEqual(dbNodeArray))\n    return;\n\n    this.clearSelection(true);\n\n    if (dbNodeArray == null || dbNodeArray.length === 0)\n    return;\n\n    for (var i = 0; i < dbNodeArray.length; i++) {\n      select(dbNodeArray[i], selectionType);\n    }\n  };\n\n\n  this.getSelectionBounds = function () {\n    var bounds = new THREE.Box3();\n    var box = new THREE.Box3();\n\n    var instanceTree = getInstanceTree();\n    if (instanceTree) {\n      var fragList = model.getFragmentList();\n\n      var sset = _this.selectedObjectIds;\n      for (var p in sset) {\n        var dbId = parseInt(p);\n        instanceTree.enumNodeFragments(dbId, function (fragId) {\n          fragList.getWorldBounds(fragId, box);\n          bounds.union(box);\n        }, true);\n      }\n    }\n\n    return bounds;\n  };\n\n  this.getSelectionVisibility = function () {\n    var hasVisible = false,\n    hasHidden = false;\n\n    var sset = _this.selectedObjectIds;\n    for (var p in sset) {\n      var dbId = parseInt(p);\n      if (dbId) {\n        var instanceTree = getInstanceTree();\n        if (!instanceTree || !instanceTree.isNodeHidden(dbId)) {\n          hasVisible = true;\n        } else {\n          hasHidden = true;\n        }\n        if (hasVisible && hasHidden) {\n          break;\n        }\n      }\n    }\n\n    return {\n      hasVisible: hasVisible,\n      hasHidden: hasHidden,\n      model: model };\n\n  };\n\n  // If a selection is made right after adding a model, selection highlight might not work\n  // yet, because...\n  //  a) SelectionTexture may not be initialized yet\n  //  b) idRemap may not loaded yet.\n  // This function makes sure that the corresponding highlighting is applied as soon as all\n  // required data are available.\n  this.update2DSelectionHighlighting = function () {\n\n    // SelectionTexture does only exist if the full model geometry is loaded. \n    // This is because selectionTexture size depends on maxObjectNumber - which is dynamically tracked during loading.\n    if (!model.isLoadDone()) {\n      return;\n    }\n\n    // F2D models with OTG databases require a dbId remapping. The remapping is only available if the instance tree is loaded.\n    // Note that it's okay if there is no remapping in some cases. The only problem is if there is one, but just not loaded yet.\n    var dbLoader = model.getPropertyDb();\n    if (dbLoader && !dbLoader.isLoadDone()) {\n      return;\n    }\n\n    // We will mark all selected objects again. So, we have to reset the map that tracks which nodes are already highlighted.\n    // Otherwise, the loop below would not trigger any highlighting update.\n    selectedParentMap = {};\n\n    // Trigger highlighting for all selected objects\n    var sel = _this.getSelection();\n    for (var i = 0; i < sel.length; i++) {\n      var dbId = sel[i];\n      var selectionType = _this.selectedObjectIds[dbId];\n      markObject(dbId, false, selectionType);\n    }\n  };\n\n  this.dtor = function () {\n    this.selectedObjectIds = null;\n  };\n\n}\n\n\nexport function MultiModelSelector(viewer) {\n\n  var _models = [];\n\n  this.highlightDisabled = false;\n  this.highlightPaused = false;\n  this.selectionDisabled = false;\n\n  this.addModel = function (model) {\n    if (_models.indexOf(model) == -1) {\n      model.selector = new Selector(viewer, model);\n      _models.push(model);\n    }\n  };\n\n  this.removeModel = function (model) {\n    var idx = _models.indexOf(model);\n\n    // make sure that we don't keep any highlighting proxy\n    var selected = model.selector.getSelection();\n    model.selector.clearSelection();\n    model.selector = null;\n    _models.splice(idx, 1);\n  };\n\n  function warn() {\n    if (_models.length > 1) {\n      logger.warn(\"This selection call does not yet support multiple models.\");\n    }\n  }\n\n  function fireAggregateSelectionChangedEvent() {\n\n    var perModel = [];\n\n    for (var i = 0; i < _models.length; i++) {\n      var dbIdArray = [];\n      var fragIdsArray = [];\n\n      var sset = _models[i].selector.selectedObjectIds;\n      var instanceTree = _models[i].selector.getInstanceTree();\n      for (var p in sset) {\n        if (sset[p]) {\n          var dbId = parseInt(p);\n          if (dbId) {\n            dbIdArray.push(dbId);\n\n            if (instanceTree) {\n              instanceTree.enumNodeFragments(dbId, function (fragId) {\n                fragIdsArray.push(fragId);\n              }, false);\n            }\n          }\n        }\n      }\n\n      if (dbIdArray.length) {\n        perModel.push({\n          fragIdsArray: fragIdsArray,\n          dbIdArray: dbIdArray,\n          nodeArray: dbIdArray,\n          model: _models[i] });\n\n      }\n    }\n\n    var event;\n\n    //For backwards compatibility, fire the old selection change event\n    //when there is just one model in the scene\n    if (_models.length === 1) {\n      event = {\n        type: et.SELECTION_CHANGED_EVENT,\n        fragIdsArray: perModel[0] ? perModel[0].fragIdsArray : [],\n        dbIdArray: perModel[0] ? perModel[0].dbIdArray : [],\n        nodeArray: perModel[0] ? perModel[0].dbIdArray : [],\n        model: _models[0] };\n\n      viewer.api.dispatchEvent(event);\n    }\n\n    //Always fire the aggregate selection changed event\n    event = {\n      type: et.AGGREGATE_SELECTION_CHANGED_EVENT,\n      selections: perModel };\n\n    viewer.api.dispatchEvent(event);\n\n  }\n\n\n  function deselectInvisible() {\n\n    var changed = false;\n\n    for (var i = 0; i < _models.length; i++) {\n      changed = _models[i].selector.deselectInvisible() || changed;\n    }\n\n    if (changed)\n    fireAggregateSelectionChangedEvent();\n  }\n\n  // @returns {boolean} true when a part is selected in any scene model.\n  this.hasSelection = function () {\n    for (var i = 0; i < _models.length; i++) {\n      if (_models[i].selector.hasSelection())\n      return true;\n    }\n    return false;\n  };\n\n  this.getSelectionLength = function () {\n    var total = 0;\n\n    for (var i = 0; i < _models.length; i++) {\n      total += _models[i].selector.getSelectionLength();\n    }\n\n    return total;\n  };\n\n  this.getSelection = function () {\n    warn();\n    if (_models.length > 1)\n    logger.warn(\"Use getAggregateSelection instead of getSelection when there are multiple models in the scene.\");\n\n    return _models[0] ? _models[0].selector.getSelection() : [];\n  };\n\n  this.getAggregateSelection = function () {\n    var res = [];\n    for (var i = 0; i < _models.length; i++) {\n      var selset = _models[i].selector.getSelection();\n      if (selset && selset.length)\n      res.push({ model: _models[i], selection: selset });\n    }\n\n    return res;\n  };\n\n  this.clearSelection = function (nofire) {\n    var selectionCleared;\n    for (var i = 0; i < _models.length; i++) {\n      if (_models[i].selector.clearSelection(nofire)) {\n        selectionCleared = true;\n      }\n    }\n    if (!nofire && selectionCleared)\n    fireAggregateSelectionChangedEvent();\n  };\n\n  this.toggleSelection = function (dbId, model, selectionType) {\n    if (this.selectionDisabled) {\n      return;\n    }\n\n    if (!model) {\n      warn();\n      model = _models[0];\n    }\n    model.selector.toggleSelection(dbId, selectionType);\n\n    fireAggregateSelectionChangedEvent();\n  };\n\n  this.setSelectionMode = function (mode) {\n    for (var i = 0; i < _models.length; i++) {\n      _models[i].selector.setSelectionMode(mode);}\n  };\n\n  this.isNodeSelectionLocked = function (dbId, model) {\n    if (!model) {\n      warn();\n      model = _models[0];\n    }\n    return model && model.selector.isNodeSelectionLocked(dbId);\n  };\n\n  this.lockSelection = function (nodeList, locked, model) {\n    if (!model) {\n      warn();\n      model = _models[0];\n    }\n    model && model.selector.lockSelection(nodeList, locked);\n  };\n\n  /**\n      * Unlocks nodes in models.\n      * @param {Number[]} [nodeList] - dbIds to unlock. If undefined, all model dbIds are unlocked\n      * @param {Autodesk.Viewing.Model} [model] - The model associated to the model\n      */\n  this.unlockSelection = function (nodeList, model) {var _this2 = this;\n    // Unlock all nodes for all models if both the parameters are missing\n    if (!nodeList && !model) {\n      _models.forEach(function (model) {\n        var lockedNodes = model.selector.lockedNodes.slice();\n        _this2.lockSelection(lockedNodes, false, model);\n      });\n      return;\n    }\n    if (!model) {\n      warn();\n      model = _models[0];\n    }\n    nodeList = nodeList || model.selector.lockedNodes.slice();\n    this.lockSelection(nodeList, false, model);\n  };\n\n  this.setSelection = function (dbNodeArray, model, selectionType) {\n    if (this.selectionDisabled) {\n      return;\n    }\n\n    if (!dbNodeArray || dbNodeArray.length === 0)\n    this.clearSelection(true);else\n    {\n      if (!model) {\n        warn();\n        model = _models[0];\n      } else {\n        for (var i = 0; i < _models.length; i++) {\n          if (_models[i] !== model)\n          _models[i].selector.clearSelection();}\n      }\n      model.selector.setSelection(dbNodeArray, selectionType);\n    }\n\n    fireAggregateSelectionChangedEvent();\n  };\n\n\n  this.setAggregateSelection = function (selection) {\n\n    if (this.selectionDisabled) {\n      return;\n    }\n\n    if (!selection || selection.length === 0) {\n      this.clearSelection(true);\n    } else {\n      for (var i = 0; i < selection.length; ++i) {\n        var model = selection[i].model;\n        var ids = selection[i].ids;\n        var selectionType = selection[i].selectionType;\n        model.selector.setSelection(ids, selectionType);\n      }\n    }\n\n    fireAggregateSelectionChangedEvent();\n  };\n\n  this.getSelectionBounds = function () {\n    if (_models.length == 1)\n    return _models[0].selector.getSelectionBounds();else\n    {\n      var bbox = new THREE.Box3();\n      for (var i = 0; i < _models.length; i++) {\n        var tmp = _models[i].selector.getSelectionBounds();\n        bbox.union(tmp);\n      }\n      return bbox;\n    }\n  };\n\n  this.getSelectionVisibility = function () {\n\n    var res = {\n      // Aggregated results\n      hasVisible: false,\n      hasHidden: false,\n      // per model specifics \n      details: [] };\n\n    for (var i = 0; i < _models.length; i++) {\n      var subRes = _models[i].selector.getSelectionVisibility();\n      res.hasVisible = res.hasVisible || subRes.hasVisible;\n      res.hasHidden = res.hasHidden || subRes.hasHidden;\n      res.details.push(subRes);\n    }\n    return res;\n  };\n\n  this.dtor = function () {\n    for (var i = 0; i < _models.length; i++) {\n      _models[i].selector.dtor();}\n  };\n\n\n  viewer.api.addEventListener(et.ISOLATE_EVENT, function (event) {\n    deselectInvisible();\n  });\n\n  viewer.api.addEventListener(et.HIDE_EVENT, function (event) {\n    deselectInvisible();\n  });\n\n  // Make sure that selection highlighting is updated when all required data are ready.\n  function update2DSelectionHighlighting(e) {\n    // Selector may be null if model has been removed meanwhile\n    if (e.model.is2d() && e.model.selector) {\n      e.model.selector.update2DSelectionHighlighting();\n    }\n  }\n  viewer.api.addEventListener(et.GEOMETRY_LOADED_EVENT, update2DSelectionHighlighting);\n  viewer.api.addEventListener(et.OBJECT_TREE_CREATED_EVENT, update2DSelectionHighlighting);\n  viewer.api.addEventListener(et.OBJECT_TREE_UNAVAILABLE_EVENT, update2DSelectionHighlighting);\n}","\nimport { isIE11, inFullscreen } from \"../compat\";\nimport { logger } from \"../logger/Logger\";\nimport * as et from \"../application/EventTypes\";\nimport { KeyCode } from \"./KeyCode\";\nimport { GlobalManagerMixin } from '../application/GlobalManagerMixin';\n\n\n/**\n                                                                         * Core interface to add and remove canvas interactions to the viewer.\n                                                                         *\n                                                                         * This class is created internally by the Viewer api and is available via the \"toolController\" property\n                                                                         * of the Viewer3D api object. Client implementations should not normally instantiate this class directly.\n                                                                         * @param {Object} viewerImpl - The viewer implementation object.\n                                                                         * @param {Object} viewerApi - The viewer api object.\n                                                                         * @param {Object} autocam - The Autocam interface object.\n                                                                         * @param {Object} utilities - The ViewingUtilities object.\n                                                                         * @param {Object} defaultHandler - The default event handling tool.\n                                                                         * @constructor\n                                                                         * @alias Autodesk.Viewing.ToolController\n                                                                         */\nexport function ToolController(viewerImpl, viewerApi, autocam, utilities, defaultHandler)\n{\n\n  this.setGlobalManager(viewerApi.globalManager);\n  this.domElement = viewerApi.canvasWrap;\n  this.selector = viewerImpl.selector;\n  this.autocam = autocam;\n  this.lastClickX = -1;\n  this.lastClickY = -1;\n  this.scrollInputEnabled = true;\n  this.keyMapCmd = true;\n\n  var isMac = navigator.userAgent.search(\"Mac OS\") !== -1;\n  var isFirefox = navigator.userAgent.search(\"Firefox\") !== -1;\n  var isChrome = navigator.userAgent.search(\"Chrome\") !== -1;\n  var isSafari = navigator.userAgent.search(\"Safari\") !== -1 && !isChrome; // Chrome has both Safari and Chrome in the string\n\n  var kMouseLeft = 0;\n  var kMouseRight = 2;\n\n  var kClickThreshold = 2; // Pixels\n  var kDoubleClickDelayThreshold = 500; // ms\n\n  var _tools = {};\n  var _toolModality = {};\n  var _toolStateChangedCbs = {};\n  var _toolStack = [];\n  var _lock = false;\n  var _downX = -1;\n  var _downY = -1;\n\n  var _firefoxLMBfix = false;\n  var _currentCursor = null;\n  var _mouseEnabled = false;\n\n  // Save click parameters when clicking with right mouse button\n  // and \"Left handed mouse setup\" is enabled so that we can\n  // simulate a double-click with the right mouse button.\n  //\n  var _checkMouseDoubleClick = {};\n\n  var _this = this;\n\n  this.__registerToolByName = function (tool, toolName)\n  {\n    _tools[toolName] = tool;\n  };\n\n  /**\n      * This method registers an event handling tool with the controller.\n      * This makes the tool available for activation and deactivation.\n      * Tools are registered under one or more names which must be provided via their \"getNames\" method.\n      * The tools \"getNames\" method must return an array of one or more names.\n      * Typically a tool will only have one name but if it wishes to operate in different modes it can use\n      * different names to activate the modes. Registered tools have the properties named\n      * \"utilities\" and \"controller\" added to them which refer to the ViewingUtilities object and this controller\n      * respectively. Tools may not use the name \"default\" which is reserved.\n      *  @param {object} tool - The tool to be registered.\n      * @param {function} onStateChanged - callback to be called when disabling the tool through the modality map\n      */\n  this.registerTool = function (tool, onStateChanged)\n  {var _this2 = this;\n    var names = tool.getNames();\n\n    if (!names || names.length === 0)\n    {\n      logger.warn(\"Cannot register tool with no name.\");\n      return false;\n    }\n    var registered = false;\n    for (var i = 0; i < names.length; ++i)\n    {\n      if (names[i] !== \"default\")\n      {\n        this.__registerToolByName(tool, names[i]);\n        var defualtStateChangedCb = function defualtStateChangedCb(enable) {\n          var name = tool.getName();\n          if (enable) {\n            _this2.activateTool(name);\n          } else {\n            _this2.deactivateTool(name);\n          }\n        };\n        _toolStateChangedCbs[names[i]] = onStateChanged && onStateChanged instanceof Function ? onStateChanged : defualtStateChangedCb;\n        registered = true;\n      }\n    }\n\n    tool.utilities = utilities;\n    tool.controller = this;\n    if (tool.register) tool.register();\n\n    return registered;\n  };\n\n  /**\n      * This method deregisters an event handling tool with the controller afterwhich it will no longer\n      * be available for activation and deactivation. All names that the tool is registered under\n      * will be deregistered. If any tool is active at the time of deregistration will first be deactivated\n      * and it's \"deactivate\" method will be called.\n      *  @param {object} tool - The tool to be deregistered.\n      */\n  this.deregisterTool = function (tool)\n  {\n    this.deactivateTool(tool.getName());\n\n    var names = tool.getNames();\n\n    if (!names || names.length === 0)\n    {\n      return false;\n    }\n    for (var i = names.length; --i >= 0;) {\n      this.__deregisterToolName(names[i]);}\n\n    if (tool.deregister) tool.deregister();\n    tool.utilities = null;\n    tool.controller = null;\n    return true;\n  };\n\n  this.__deregisterToolName = function (name)\n  {\n    function cleanStack(name)\n    {\n      for (var i = _toolStack.length; --i >= 0;) {\n        if (_toolStack[i].activeName === name)\n        {\n          _tools[name].deactivate(name);\n          _toolStack.splice(i, 1);\n        }}\n    }\n    if (name in _tools)\n    {\n      cleanStack(name);\n      delete _tools[name];\n    }\n  };\n\n  /**\n      * This method returns the tool registered under the given name.\n      * @param {string} name - The tool name to look up.\n      * @returns {object} The tool registered under the given name or undefined if not found.\n      */\n  this.getTool = function (name)\n  {\n    return _tools[name];\n  };\n\n  /**\n      * This method returns the name of the topmost tool on the tool stack.\n      * If no tools are active the name of the default tool is returned (which is \"default\").\n      * @returns {string} The tool name to look up.\n      */\n  this.getActiveToolName = function ()\n  {\n    var l = _toolStack.length;\n    return l > 0 ? _toolStack[l - 1].activeName : \"default\";\n  };\n\n  /**\n      * This method returns the name of the topmost tool on the tool stack.\n      * If no tools are active the name of the default tool is returned (which is \"default\").\n      * @returns {string} The tool name to look up.\n      */\n  this.getActiveTool = function ()\n  {\n    var l = _toolStack.length;\n    return l > 0 ? _toolStack[l - 1] : _tools[\"default\"];\n  };\n\n  /**\n      * Return the current tool stack.\n      * @returns {Array} - list of tools in the tool stack\n      */\n  this.getActiveTools = function () {\n    return _toolStack.slice();\n  };\n\n\n  this.isToolActivated = function (toolName)\n  {\n    for (var i = 0; i < _toolStack.length; i++) {\n\n      if (_toolStack[i].activeName === toolName) {\n        return true;\n      }\n    }\n    return false;\n  };\n\n  this.setToolActiveName = function (toolName)\n  {\n    var tool = _tools[toolName];\n    if (tool) {\n      tool.activeName = toolName;\n    }\n  };\n\n  function getPriority(tool)\n  {\n    return tool.getPriority instanceof Function && tool.getPriority() || 0;\n  }\n\n  /**\n     * Sorts the toolStack according to the tools' priority.\n     * Useful when a tool's priority gets changed after activation.\n     */\n  this.rearrangeByPriorities = function () {\n    _toolStack.sort(function (a, b) {\n      return getPriority(a) - getPriority(b);\n    });\n  };\n\n  /**\n      * Disables or enables tools in the tool's modality map\n      * @param {string} toolName - Name of the tool\n      */\n  this.activateToolModality = function (toolName) {\n    var modalityMap = this.getToolModality(toolName);\n    for (var name in modalityMap) {\n      var enable = modalityMap[name];\n      var stateChangedCb = _toolStateChangedCbs[name];\n      var isActive = this.isToolActivated(name);\n      if (enable !== isActive && stateChangedCb) {\n        stateChangedCb(enable);\n      }\n    }\n  };\n\n  /**\n      * Activates the tool registered under the given name. Activation implies pushing the tool\n      * on a stack of \"active\" tools, each of which (starting from the top of the stack) is given\n      * the opportunity to handle incoming events. Tools may \"consume\" events by returning true\n      * from their event handling methods, or they may allow events to be passed down to the next tool\n      * on the stack by returning false from the handling methods.\n      * Upon activation the tools \"activate\" method is called with the name under which it has been activated.\n      * Activation is not allowed while the controller is in a \"locked\" state (see the methods \"setIsLocked\"\n      * and \"getIsLocked\"). Tools must be registered prior to activation (see the methods \"registerTool\"\n      * and \"deregisterTool\").\n      * Each tool has its own priority property (default 0), such that a tool with higher priority will get events first. \n      * @param {string} toolName - The name of the tool to be activated.\n      * @returns {boolean} True if activation was successful.\n      */\n  this.activateTool = function (toolName)\n  {\n    if (_lock)\n    return false;\n\n    var tool = _tools[toolName];\n\n    this.activateToolModality(toolName);\n\n    if (tool)\n    {\n      if (tool.count === undefined)\n      tool.count = 0;\n\n      var interceptor = null;\n      if (_toolStack.length && _toolStack[_toolStack.length - 1].activeName === \"intercept\") {\n        interceptor = _toolStack.pop();\n      }\n\n      var indexToPush = 0;\n\n      for (var i = 0; i < _toolStack.length; i++) {\n\n        if (_toolStack[i] === tool) {\n          tool.count++;\n        }\n\n        if (getPriority(_toolStack[i]) <= getPriority(tool)) {\n          indexToPush = i + 1;\n        }\n      }\n\n      tool.activeName = toolName;\n\n      // If the tool belongs to a same instance in tool stack, then don't push it into stack.\n      if (tool.count === 0) {\n        tool.count++;\n        _toolStack.splice(indexToPush, 0, tool);\n      }\n\n\n      tool.activate(toolName, viewerApi);\n      if (interceptor) {\n        _toolStack.push(interceptor);\n      }\n\n      viewerApi.dispatchEvent(\n      {\n        type: et.TOOL_CHANGE_EVENT,\n        toolName: toolName,\n        tool: tool,\n        active: true });\n\n      return true;\n    }\n    logger.warn(\"activateTool not found: \" + toolName);\n    return false;\n  };\n\n  /**\n      * The first tool found on the active stack with the given name is removed and its \"deactivate\" method\n      * is called. Once deactivated the tool will no longer receive events via its handler methods.\n      * Deactivation is not allowed while the controller is in a \"locked\" state (see the methods \"setIsLocked\"\n      * and \"getIsLocked\").\n      * @param {string} toolName - The name of the tool to be deactivated.\n      * @returns {boolean} True if deactivation was successful.\n      */\n  this.deactivateTool = function (toolName)\n  {\n    if (_lock)\n    return false;\n\n    for (var i = _toolStack.length; --i >= 0;)\n    {\n      if (_toolStack[i].activeName === toolName)\n      {\n        var tool = _tools[toolName];\n        if (tool.count === 1)\n        _toolStack.splice(i, 1);\n\n        tool.count--;\n\n        tool.deactivate(toolName);\n\n        viewerApi.dispatchEvent(\n        {\n          type: et.TOOL_CHANGE_EVENT,\n          toolName: toolName,\n          tool: tool,\n          active: false });\n\n        return true;\n      }\n    }\n    logger.warn(\"deactivateTool not found: \" + toolName);\n    return false;\n  };\n\n  /**\n      * Obtain a list of all the currently registered tool names.\n      * @returns {array} List of all registered tool names.\n      */\n  this.getToolNames = function ()\n  {\n    return Object.keys(_tools);\n  };\n\n  /**\n      * Set the tool which will be requested to handle events if no other active tool handles them.\n      * @param {object} tool - The tool to be registered as the default.\n      */\n  this.setDefaultTool = function (tool)\n  {\n    var current = this.getDefaultTool();\n    if (tool && tool !== current)\n    {\n      this.__registerToolByName(tool, \"default\");\n      if (current)\n      current.deactivate(\"default\");\n      tool.activate(\"default\");\n      return true;\n    }\n    return false;\n  };\n\n  /**\n      * Get the tool which handle events if no other active tool handles them.\n      * @returns {object} The tool to be registered as the default.\n      */\n  this.getDefaultTool = function ()\n  {\n    return _tools[\"default\"];\n  };\n\n  this.setDefaultTool(defaultHandler);\n\n  /**\n                                        * Set the controller into a locked or unlocked state. While locked, tool activation and deactivation\n                                        * is not allowed. Locking the controller is sometimes necessary to force an interaction to remain\n                                        * active until it is fully completed.\n                                        * @param {boolean} state - The state of the controller lock.\n                                        * @returns {boolean} The previous state of the lock (this may be used to restore the lock\n                                        * to it's previous state).\n                                        */\n  this.setIsLocked = function (state)\n  {\n    var prev = _lock;\n    _lock = !!state;\n    return prev;\n  };\n\n  /**\n      * Get the current state of the controller lock.\n      * @returns {boolean} The state of the lock.\n      */\n  this.getIsLocked = function ()\n  {\n    return _lock;\n  };\n\n  this.__checkCursor = function ()\n  {\n    var cursor = null;\n    for (var n = _toolStack.length; --n >= 0;)\n    {\n      var tool = _toolStack[n];\n      if (tool.getCursor)\n      {\n        cursor = tool.getCursor();\n        if (cursor)\n        break;\n      }\n    }\n    if (!cursor)\n    cursor = \"auto\";\n\n    if (_currentCursor != cursor)\n    {\n      viewerApi.canvas.style.cursor = cursor;\n      _currentCursor = cursor;\n    }\n  };\n\n  this.update = function (highResTimestamp)\n  {\n    this.__checkCursor();\n\n    var refresh = false;\n\n    if (utilities && utilities.update())\n    refresh = true;\n\n    for (var n = _toolStack.length; --n >= 0;)\n    {\n      var tool = _toolStack[n];\n      if (tool.update && tool.update(highResTimestamp))\n      refresh = true;\n    }\n    if (viewerApi.navigation.getCamera().dirty)\n    {\n      viewerApi.navigation.updateCamera();\n      refresh = true;\n      this.cameraUpdated = true;\n    } else {\n      this.cameraUpdated = false;\n    }\n\n    //Delay reporting stationary\n    if (refresh)\n    {\n      viewerApi.navigation.updateCamera();\n      this.moveDelay = Date.now() + 150; // Milliseconds\n    } else\n    if (this.moveDelay !== 0)\n    {\n      var delta = this.moveDelay - Date.now();\n      if (delta > 0)\n      refresh = true;else\n\n      this.moveDelay = 0;\n    }\n    return refresh;\n  };\n\n\n  // ------------------------\n  // Event handler callbacks:\n  // These can use \"this\".\n\n  this.__clientToCanvasCoords = function (event, normalized, screen)\n  {\n    var rect = viewerImpl.getCanvasBoundingClientRect();\n    var width = rect.width;\n    var height = rect.height;\n\n    // Canvas coordinates: relative to the canvas element.\n    // 0 = top left, +ve right and down.\n    //\n    var canvasX = event.clientX - rect.left;\n    var canvasY = event.clientY - rect.top;\n    event.canvasX = canvasX;\n    event.canvasY = canvasY;\n\n    // Normalized coordinates: [-1, +1].\n    // 0 = center, +ve = right and up.\n    //\n    event.normalizedX = canvasX / width * 2.0 - 1.0;\n    event.normalizedY = (height - canvasY) / height * 2.0 - 1.0;\n\n    // Vector: [0, 1].\n    // 0 = top left, +ve right and down.\n    //\n    if (normalized)\n    normalized.set(canvasX / width, canvasY / height, 0.0);\n\n    if (screen)\n    screen.set(canvasX, canvasY);\n  };\n\n  this.__invokeStack = function (method, arg1, arg2)\n  {\n    for (var n = _toolStack.length; --n >= 0;)\n    {\n      var tool = _toolStack[n];\n\n      if (tool && tool[method] && tool[method](arg1, arg2))\n      {\n        //logger.log(method + \" consumed by \" + tool.getName() + \" = \" + arg1.type);\n        return true;\n      }\n    }\n    var last = this.getDefaultTool();\n    if (last[method] && last[method](arg1, arg2))\n    {\n      //logger.log(method + \" consumed by \" + last.getName() + \" = \" + arg1.type);\n      return true;\n    }\n    return false;\n  };\n\n  this.distributeEvent = function (methodName, arg1, arg2)\n  {\n    return this.__invokeStack(methodName, arg1, arg2);\n  };\n\n  this.handleResize = function ()\n  {\n    viewerApi.navigation.setScreenViewport(viewerApi.container.getBoundingClientRect());\n\n    // Call handleResize on all tools in case they need it:\n    for (var n = _toolStack.length; --n >= 0;)\n    {\n      var tool = _toolStack[n];\n\n      if (tool.handleResize)\n      tool.handleResize();\n    }\n  };\n\n  this.handleSingleClick = function (event)\n  {\n    var button = this.applyButtonMappings(event);\n    this.lastClickX = event.clientX;\n    this.lastClickY = event.clientY;\n\n    if (this.__invokeStack(\"handleSingleClick\", event, button))\n    {\n      event.preventDefault();\n      event.stopPropagation();\n    }\n  };\n\n  this.handleDoubleClick = function (event)\n  {\n    var button = this.applyButtonMappings(event);\n\n    if (this.__invokeStack(\"handleDoubleClick\", event, button))\n    {\n      event.preventDefault();\n      event.stopPropagation();\n    }\n  };\n\n  this.handleSingleTap = function (event)\n  {\n    this.lastClickX = event.canvasX;\n    this.lastClickY = event.canvasY;\n\n    if (this.__invokeStack(\"handleSingleTap\", event))\n    {\n      event.preventDefault();\n      event.stopPropagation();\n    }\n  };\n\n  this.handleDoubleTap = function (event)\n  {\n    this.lastClickX = event.canvasX;\n    this.lastClickY = event.canvasY;\n\n    if (this.__invokeStack(\"handleDoubleTap\", event))\n    {\n      event.preventDefault();\n      event.stopPropagation();\n    }\n  };\n\n  this.handleWheelInput = function (delta, event)\n  {\n    if (this.__invokeStack(\"handleWheelInput\", delta, event))\n    {\n      event.preventDefault();\n      event.stopPropagation();\n    }\n  };\n\n  this.applyButtonMappings = function (event)\n  {\n    var button = event.button;\n\n    // Check for Firefox spoof: Control+LMB converted to RMB.\n    // The \"buttons\" property in Firefox will include 1 for LMB and 2 for RMB.\n    if (\"buttons\" in event)\n    {\n      // This method sometimes gets called more than once with\n      // the same event:\n      if (event.firefoxSpoof)\n      {\n        button = kMouseLeft;\n      }\n      // For button down the 1 bit will be on indicating LMB.\n      // For button up it's off so check the flag to see if we\n      // switched the down event.\n      else if (_firefoxLMBfix && !(event.buttons & 1)) // Button up?\n          {\n            event.firefoxSpoof = true;\n            _firefoxLMBfix = false;\n            button = kMouseLeft;\n          } else\n        if (button === kMouseRight && event.buttons & 1)\n        {\n          button = kMouseLeft; // Convert back to reality.\n          event.firefoxSpoof = _firefoxLMBfix = true;\n        }\n    }\n    if (viewerApi.navigation.getUseLeftHandedInput())\n    {\n      button = button === kMouseLeft ? kMouseRight :\n      button === kMouseRight ? kMouseLeft : button;\n    }\n    return button;\n  };\n\n  this.applyKeyMappings = function (event)\n  {\n    switch (event.keyCode) {\n\n      case KeyCode.EQUALSMOZ:return KeyCode.EQUALS;\n\n      case KeyCode.DASHMOZNEW:\n      case KeyCode.DASHMOZ:return KeyCode.DASH;}\n\n    return event.keyCode;\n  };\n\n  this.handleKeyDown = function (event)\n  {\n    var keyCode;\n\n    if (this.keyMapCmd && isMac && (event.code == \"MetaLeft\" || event.code == \"MetaRight\")) {\n      handleCmdKeyEvent(event, 'keydown');\n      return;\n    } else\n    {\n      keyCode = this.applyKeyMappings(event);\n    }\n\n    if (keyCode && this.__invokeStack(\"handleKeyDown\", event, keyCode))\n    {\n      event.preventDefault();\n      event.stopPropagation();\n    }\n  };\n\n  this.handleKeyUp = function (event)\n  {\n    var keyCode;\n\n    if (this.keyMapCmd && isMac && (event.code == \"MetaLeft\" || event.code == \"MetaRight\")) {\n      handleCmdKeyEvent(event, 'keyup');\n      return;\n    } else\n    {\n      keyCode = this.applyKeyMappings(event);\n    }\n\n    if (keyCode && this.__invokeStack(\"handleKeyUp\", event, keyCode))\n    {\n      event.preventDefault();\n      event.stopPropagation();\n    }\n  };\n\n  function handleCmdKeyEvent(cmdEvent, eventType) {\n    cmdEvent.preventDefault();\n    cmdEvent.stopPropagation();\n\n    var ev = new KeyboardEvent(eventType, {\n      \"key\": \"Control\", //optional and defaulting to \"\", of type DOMString, that sets the value of KeyboardEvent.key.\n      \"code\": cmdEvent.code == \"MetaLeft\" ? \"ControlLeft\" : \"ControlRight\", //optional and defaulting to \"\", of type DOMString, that sets the value of KeyboardEvent.codevent.\n      \"location\": cmdEvent.location, //optional and defaulting to 0, of type unsigned long, that sets the value of KeyboardEvent.location.\n      \"ctrlKey\": true, //optional and defaulting to false, of type Boolean, that sets the value of KeyboardEvent.ctrlKey.\n      \"metaKey\": false, //optional and defaulting to false, of type Boolean, that sets the value of KeyboardEvent.metaKey.\n      \"repeat\": cmdEvent.repeat, //optional and defaulting to false, of type Boolean, that sets the value of KeyboardEvent.repeat.\n      \"isComposing\": cmdEvent.isComposing, //optional and defaulting to false, of type Boolean, that sets the value of KeyboardEvent.isComposing.\n      \"charCode\": 0, //optional and defaulting to 0, of type unsigned long, that sets the value of the deprecated KeyboardEvent.charCodevent.\n      \"keyCode\": 17, //optional and defaulting to 0, of type unsigned long, that sets the value of the deprecated KeyboardEvent.keyCode.\n      \"which\": 17 //optional and defaulting to 0, of type unsigned long, that sets the value of the deprecated KeyboardEvent.which.\n    });\n\n    window.dispatchEvent(ev);\n  }\n\n  this.handleButtonDown = function (event, button)\n  {\n    if (this.__invokeStack(\"handleButtonDown\", event, button))\n    {\n      event.preventDefault();\n      event.stopPropagation();\n    }\n  };\n\n  this.handleButtonUp = function (event, button)\n  {\n    if (this.__invokeStack(\"handleButtonUp\", event, button))\n    {\n      event.preventDefault();\n      event.stopPropagation();\n    }\n  };\n\n  this.handleMouseMove = function (event)\n  {\n    if (this.__invokeStack(\"handleMouseMove\", event))\n    {\n      event.preventDefault();\n      event.stopPropagation();\n    }\n  };\n\n  this.handleBlur = function (event)\n  {\n    if (this.__invokeStack(\"handleBlur\", event))\n    {\n      event.preventDefault();\n      event.stopPropagation();\n    }\n  };\n\n  // ====================================================\n  // Event handlers: (only use \"_this\" in these methods):\n\n  this.keydown = function (event)\n  {\n    if (ToolController._lastTouchedElement && !_this.domElement.contains(ToolController._lastTouchedElement)) {\n      return;\n    }\n    var _document = _this.getDocument();\n    if (_document.activeElement instanceof HTMLInputElement ||\n    _document.activeElement instanceof HTMLTextAreaElement ||\n    _document.activeElement instanceof HTMLSelectElement) {\n      return;\n    }\n\n    // Support for HTML5 editable divs\n    if (_document.activeElement) {\n      var divIsEditable = _document.activeElement.getAttribute('contenteditable');\n      if (divIsEditable === 'true' || divIsEditable === '') {\n        // TODO: Proper handle of value 'inherit'\n        return;\n      }\n    }\n\n    _this.handleKeyDown(event);\n  };\n\n  this.keyup = function (event)\n  {\n    _this.handleKeyUp(event);\n  };\n\n  function shouldCheckDoubleClick(button, event) {\n    return viewerApi.navigation.getUseLeftHandedInput() && button === 0 || isFirefox && button === 1 ||\n    isMac && !isSafari && button === 0 && event.ctrlKey;\n  }\n\n  this.mousedown = function (event)\n  {\n    var _document = _this.getDocument();\n    // Don't do blur in full screen (IE issue)\n    if (!(isIE11 && inFullscreen(_document))) {\n      _document.activeElement && _document.activeElement.blur && _document.activeElement.blur();\n    }\n\n    _this.__clientToCanvasCoords(event);\n\n    var buttonDown = _this.applyButtonMappings(event);\n    _this.handleButtonDown(event, buttonDown);\n\n    _downX = event.canvasX;\n    _downY = event.canvasY;\n\n    if (shouldCheckDoubleClick(buttonDown, event))\n    {\n      var cmdc = _checkMouseDoubleClick;\n\n      var delayOK = cmdc.time !== undefined &&\n      event.timeStamp - cmdc.time < kDoubleClickDelayThreshold;\n\n      var positionOK = cmdc.x !== undefined && cmdc.y !== undefined &&\n      Math.abs(cmdc.x - event.canvasX) <= kClickThreshold &&\n      Math.abs(cmdc.y - event.canvasY) <= kClickThreshold;\n\n      if (!delayOK || !positionOK || cmdc.clickCount && 2 <= cmdc.clickCount) {\n        cmdc.clickCount = 0;\n      }\n\n      if (!cmdc.clickCount) {\n        cmdc.clickCount = 1;\n        cmdc.x = event.canvasX;\n        cmdc.y = event.canvasY;\n        cmdc.time = event.timeStamp;\n\n      } else if (cmdc.clickCount === 1) {\n        cmdc.clickCount = 2;\n      }\n    }\n\n    function handleUp(event)\n    {\n      var buttonUp = _this.applyButtonMappings(event);\n      if (buttonUp === buttonDown)\n      {\n        _this.removeDocumentEventListener('mouseup', handleUp);\n        _this.mouseup(event);\n      }\n    }\n\n    _this.addDocumentEventListener('mouseup', handleUp, false);\n\n    _this.registerWindowMouseMove();\n  };\n\n  this.mousemove = function (event)\n  {\n    _this.__clientToCanvasCoords(event);\n\n    var deltaX = _downX - event.canvasX;\n    var deltaY = _downY - event.canvasY;\n    if (Math.abs(deltaX) > kClickThreshold || Math.abs(deltaY) > kClickThreshold)\n    {\n      _downX = -1;\n      _downY = -1;\n    }\n    _this.handleMouseMove(event);\n  };\n\n  this.mouseup = function (event)\n  {\n    _this.__clientToCanvasCoords(event);\n\n    var buttonUp = _this.applyButtonMappings(event);\n    _this.handleButtonUp(event, buttonUp);\n\n    var deltaX = _downX - event.canvasX;\n    var deltaY = _downY - event.canvasY;\n\n    _downX = -1;\n    _downY = -1;\n\n    if (Math.abs(deltaX) <= kClickThreshold && Math.abs(deltaY) <= kClickThreshold)\n    _this.handleSingleClick(event);\n\n    if (shouldCheckDoubleClick(buttonUp, event))\n    {\n      var cmdc = _checkMouseDoubleClick;\n      if (cmdc.clickCount === 2) {\n        _this.handleDoubleClick(event);\n\n        cmdc.clickCount = 0;\n        cmdc.x = undefined;\n        cmdc.y = undefined;\n        cmdc.time = undefined;\n      }\n    }\n\n    _this.unregisterWindowMouseMove();\n  };\n\n  this.doubleclick = function (event)\n  {\n    _this.__clientToCanvasCoords(event);\n\n    _downX = event.canvasX;\n    _downY = event.canvasY;\n\n    _this.handleDoubleClick(event);\n  };\n\n  this.mousewheel = function (event)\n  {\n    if (!_this.scrollInputEnabled) {\n      return;\n    }\n\n    // A mousewheel event also contains coordinates of the mouse position, so we make them available as canvas coords too.\n    _this.__clientToCanvasCoords(event);\n\n    var delta = 0;\n\n    if (event.wheelDelta) {// WebKit / Opera / Explorer 9\n      delta = event.wheelDelta / 40;\n    } else\n    if (event.detail) {// Firefox\n      delta = -event.detail;\n    } else\n    if (event.deltaY) {// Firefox / Explorer + event target is SVG.\n      var factor = isFirefox ? 1 : 40;\n      delta = -event.deltaY / factor;\n    }\n\n    _this.handleWheelInput(delta, event);\n  };\n\n  this.blur = function (event)\n  {\n    _this.handleBlur(event);\n  };\n\n  // ??? this.domElement.addEventListener( 'contextmenu', function ( event ) { event.preventDefault(); }, false );\n\n  this.mouseover = function (e)\n  {\n    ToolController._lastTouchedElement = e.target;\n    // ??? if (ToolController._lastTouchedElement != viewerImpl.canvas) _this.autoMove(-1, false)\n  };\n\n  // to maintain drag continuity outside the canvas element\n  // move mousemove/over listeners from canvas to window\n  this.registerWindowMouseMove = function () {\n    _this.addWindowEventListener('mousemove', _this.mousemove);\n    _this.addWindowEventListener('mouseover', _this.mouseover);\n    _this.domElement.removeEventListener('mousemove', _this.mousemove);\n    _this.domElement.removeEventListener('mouseover', _this.mouseover);\n  };\n\n  this.unregisterWindowMouseMove = function () {\n    _this.removeWindowEventListener('mousemove', _this.mousemove);\n    _this.removeWindowEventListener('mouseover', _this.mouseover);\n    _this.domElement.addEventListener('mousemove', _this.mousemove);\n    _this.domElement.addEventListener('mouseover', _this.mouseover);\n  };\n\n  this.enableMouseButtons = function (state)\n  {\n    if (state && !_mouseEnabled)\n    {\n      this.domElement.addEventListener('mousedown', this.mousedown);\n      this.domElement.addEventListener('dblclick', this.doubleclick);\n      this.domElement.addEventListener('mousemove', this.mousemove);\n      this.domElement.addEventListener('mouseover', this.mouseover);\n    } else\n    if (!state && _mouseEnabled)\n    {\n      this.domElement.removeEventListener('mousedown', this.mousedown);\n      this.domElement.removeEventListener('dblclick', this.doubleclick);\n      this.domElement.removeEventListener('mousemove', this.mousemove);\n      this.domElement.removeEventListener('mouseover', this.mouseover);\n    }\n    var returnValue = _mouseEnabled;\n    _mouseEnabled = state;\n\n    return returnValue;\n  };\n\n  // If we want to continue listenting to mouse movements outside of the window\n  // we need to tie our event listener to the window\n\n  this.domElement.addEventListener('mousewheel', this.mousewheel, false);\n  this.domElement.addEventListener('DOMMouseScroll', this.mousewheel, false); // firefox\n\n  //** this.domElement.addEventListener( 'touchstart', function( event ) { _this.touchstart( event )}, false );\n  //** this.domElement.addEventListener( 'touchmove', function( event ) { _this.touchmove( event )}, false );\n\n  _this.addWindowEventListener('keydown', this.keydown, false);\n  _this.addWindowEventListener('keyup', this.keyup, false);\n  _this.addWindowEventListener('blur', this.blur, false);\n\n  this.uninitialize = function () {\n    // remove them all just to be sure, doesn't hurt\n    this.domElement.removeEventListener('mousemove', this.mousemove);\n    this.domElement.removeEventListener('mouseover', this.mouseover);\n    this.removeWindowEventListener('mousemove', this.mousemove);\n    this.removeWindowEventListener('mouseover', this.mouseover);\n\n    this.removeWindowEventListener('keydown', this.keydown);\n    this.removeWindowEventListener('keyup', this.keyup);\n    this.removeWindowEventListener('blur', this.blur);\n\n    this.domElement = null;\n    this.selector = null;\n    this.autocam = null;\n\n    _lock = false; // Critical to unlock before deactivating all tools, so we'll be able actually deactivate them.\n\n    // Deactivate all active tools\n    while (_toolStack.length > 0) {\n      this.deactivateTool(_toolStack[_toolStack.length - 1].activeName);}\n    _tools = null;\n    _toolStack = null;\n    _this = null;\n    utilities = null;\n    viewerApi = null;\n    viewerImpl = null;\n    ToolController._lastTouchedElement = null;\n  };\n\n  // Compatibility methods. TODO: eliminate these\n  this.set2DMode = function (state) {};\n  this.setAutocam = function (autocam) {};\n  this.syncCamera = function () {};\n\n  // TODO: implement this in navapi - then set autocam home from navapi values\n  this.recordHomeView = function ()\n  {\n    var camera = viewerApi.navigation.getCamera();\n    autocam.sync(camera);\n    autocam.setHomeViewFrom(camera);\n  };\n\n  /**\n      * Whether mouse scroll wheel (and/or two-finger vertical swipe) will trigger a camera zoom operation.\n      * @param {boolean} isEnabled\n      */\n  this.setMouseWheelInputEnabled = function (isEnabled) {\n    this.scrollInputEnabled = isEnabled;\n  };\n\n  /**\n      * Set the modality map for each tool. This function will clear any existing modality map.\n      * The map object consists of a key which represents the tool name and a value which is an object that represents which tools to enable and disable.\n      * To get the tool names @see {@link Autodesk.Viewing.ToolController#getToolNames}\n      * @example\n      * // When enabling the measure tool the explode, bimwalk and section tools will be disabled.\n      * // When enabling the section tool the pan tool will be disabled.\n      * toolController.setModalityMap({\n      *     measure: { explode: false, bimwalk: false, section: false },\n      *     section: { pan: false }\n      * });\n      * @param {Object} map - Object describing each tool's modality with other tools. \n      */\n  this.setModalityMap = function (map) {\n    // Clear the existing modality map\n    _toolModality = {};\n    for (var name in map) {\n      this.setToolModality(name, map[name]);\n    }\n  };\n\n  /**\n      * Get the modality map.\n      * @returns {Object} - returns a copy of the tool modality.\n      */\n  this.getModalityMap = function () {\n    return Object.assign({}, _toolModality);\n  };\n\n  /**\n      * Get a specific tool's modality map.\n      * @param {string} name - tool name\n      * @returns {Object} - an object describing the tool's modality map. \n      */\n  this.getToolModality = function (name) {\n    return _toolModality[name];\n  };\n\n  /**\n      * \n      * @param {String} name - Tool name that is associated with the modality map. \n      * @param {Object} map - Object containing the name of the tool as the key and a boolean that describes if the tool can be enabled or disabled.\n      */\n  this.setToolModality = function (name, map) {\n    if (!name) {\n      logger.warn('Cannot add tool modality. Missing tool name.');\n      return;\n    }\n\n    if (!map) {\n      logger.warn('Cannot add tool modality. Missing tool map.');\n      return;\n    }\n\n    _toolModality[name] = map;\n  };\n}\n\n// Private static variable to store which viewer basically should process keyboard events\nObject.defineProperty(ToolController, '_lastTouchedElement', { value: null, writable: true });\n\nGlobalManagerMixin.call(ToolController.prototype);","/**\n * Base class for new interaction tools.\n *\n * Can also be used simply as a template for creating a new tool.\n * @constructor\n * @see Autodesk.Viewing.ToolController\n * @alias Autodesk.Viewing.ToolInterface\n */\nexport function ToolInterface()\n{\n  this.names = [\"unnamed\"];\n\n  /**\n                             * This method should return an array containing the names of all tools implemented by this class.\n                             * Often this would be a single name but it is possible to support multiple interactions with a single tool.\n                             * When this tool is registered with the ToolController each name gets registered as an available tool.\n                             * @returns {array} Array of strings. Should not be empty.\n                             */\n  this.getNames = function () {\n    return this.names;\n  };\n\n  /**\n      * This is an optional convenience method to obtain the first name of this tool.\n      * @returns {string} The tools default name.\n      */\n  this.getName = function () {\n    return this.names[0];\n  };\n\n  /**\n      * This method should return the priority of the tool inside the tool stack.\n      * A tool with higher priority will get events first.\n      * @returns {number} The tool's priority.\n      */\n  this.getPriority = function () {\n    return 0;\n  };\n\n  /**\n      * This method is called by {@link Autodesk.Viewing.ToolController#registerTool}.\n      * Use this for initialization.\n      */\n  this.register = function () {\n  };\n\n  /**\n      * This method is called by {@link Autodesk.Viewing.ToolController#deregisterTool}.\n      * Use this to clean up your tool.\n      */\n  this.deregister = function () {\n  };\n\n  /**\n      * The activate method is called by the ToolController when it adds this tool to the list of those\n      * to receive event handling calls. Once activated, a tool's \"handle*\" methods may be called\n      * if no other higher priority tool handles the given event. Each active tool's \"update\" method also gets\n      * called once during each redraw loop.\n      * @param {string} name - The name under which the tool has been activated.\n      * @param {Autodesk.Viewing.Viewer3D} viewerApi - Viewer instance.\n      */\n  this.activate = function (name, viewerApi) {\n  };\n\n  /**\n      * The deactivate method is called by the ToolController when it removes this tool from the list of those\n      * to receive event handling calls. Once deactivated, a tool's \"handle*\" methods and \"update\" method\n      * will no longer be called.\n      * @param {string} name - The name under which the tool has been deactivated.\n      */\n  this.deactivate = function (name) {\n  };\n\n  /**\n      * The update method is called by the ToolController once per frame and provides each tool\n      * with the oportunity to make modifications to the scene or the view.\n      * @param {number} highResTimestamp - The process timestamp passed to requestAnimationFrame by the web browser.\n      * @returns {boolean} A state value indicating whether the tool has modified the view or the scene\n      * and a full refresh is required.\n      */\n  this.update = function (highResTimestamp) {\n    return false;\n  };\n\n  /**\n      * This method is called when a single mouse button click occurs.\n      * @param {MouseEvent} event - The event object that triggered this call.\n      * @param {number} button - The button number that was clicked (0, 1, 2 for Left, Middle, Right respectively).\n      * Note that the button parameter value may be different that the button value indicated in the event\n      * object due to button re-mapping preferences that may be applied. This value should be respected\n      * over the value in the event object.\n      * @returns {boolean} True if this tool wishes to consume the event and false to continue to pass\n      * the event to lower priority active tools.\n      */\n  this.handleSingleClick = function (event, button) {\n    return false;\n  };\n\n  /**\n      * This method is called when a double mouse button click occurs.\n      * @param {MouseEvent} event - The event object that triggered this call.\n      * @param {number} button - The button number that was clicked (0, 1, 2 for Left, Middle, Right respectively).\n      * Note that the button parameter value may be different that the button value indicated in the event\n      * object due to button re-mapping preferences that may be applied. This value should be respected\n      * over the value in the event object.\n      * @returns {boolean} True if this tool wishes to consume the event and false to continue to pass the event\n      * to lower priority active tools.\n      */\n  this.handleDoubleClick = function (event, button) {\n    return false;\n  };\n\n  /**\n      * This method is called when a single tap on a touch device occurs.\n      * @param {Event} event - The triggering event. For tap events the canvasX, canvasY properties contain\n      * the canvas relative device coordinates of the tap and the normalizedX, normalizedY properties contain\n      * the tap coordinates in the normalized [-1, 1] range. The event.pointers array will contain\n      * either one or two touch events depending on whether the tap used one or two fingers.\n      * @returns {boolean} True if this tool wishes to consume the event and false to continue to pass the event\n      * to lower priority active tools.\n      */\n  this.handleSingleTap = function (event) {\n    return false;\n  };\n\n  /**\n      * This method is called when a double tap on a touch device occurs.\n      * @param {Event} event - The triggering event. For tap events the canvasX, canvasY properties contain\n      * the canvas relative device coordinates of the tap and the normalizedX, normalizedY properties contain\n      * the tap coordinates in the normalized [-1, 1] range. The event.pointers array will contain\n      * either one or two touch events depending on whether the tap used one or two fingers.\n      * @returns {boolean} True if this tool wishes to consume the event and false to continue to pass the event\n      * to lower priority active tools.\n      */\n  this.handleDoubleTap = function (event) {\n    return false;\n  };\n\n  /**\n      * This method is called when a keyboard button is depressed.\n      * @param {KeyboardEvent} event - The event object that triggered this call.\n      * @param {number} keyCode - The numerical key code identifying the key that was depressed.\n      * Note that the keyCode parameter value may be different that the value indicated in the event object\n      * due to key re-mapping preferences that may be applied. This value should be respected\n      * over the value in the event object.\n      * @returns {boolean} True if this tool wishes to consume the event and false to continue to pass the event\n      * to lower priority active tools.\n      */\n  this.handleKeyDown = function (event, keyCode) {\n    return false;\n  };\n\n  /**\n      * This method is called when a keyboard button is released.\n      * @param {KeyboardEvent} event - The event object that triggered this call.\n      * @param {number} keyCode - The numerical key code identifying the key that was released.\n      * Note that the keyCode parameter value may be different that the value indicated in the event object\n      * due to key re-mapping preferences that may be applied. This value should be respected\n      * over the value in the event object.\n      * @returns {boolean} True if this tool wishes to consume the event and false to continue to pass the event\n      * to lower priority active tools.\n      */\n  this.handleKeyUp = function (event, keyCode) {\n    return false;\n  };\n\n  /**\n      * This method is called when a mouse wheel event occurs.\n      * @param {number} delta - A numerical value indicating the amount of wheel motion applied.\n      * Note that this value may be modified from the orignal event values so as to provide consistent results\n      * across browser families.\n      * @returns {boolean} True if this tool wishes to consume the event and false to continue to pass the event\n      * to lower priority active tools.\n      */\n  this.handleWheelInput = function (delta) {\n    return false;\n  };\n\n  /**\n      * This method is called when a mouse button is depressed.\n      * @param {MouseEvent} event - The event object that triggered this call.\n      * @param {Number} button - The button number that was depressed (0, 1, 2 for Left, Middle, Right respectively).\n      * Note that the button parameter value may be different that the button value indicated in the event object\n      * due to button re-mapping preferences that may be applied. This value should be respected\n      * over the value in the event object.\n      * @returns {boolean} True if this tool wishes to consume the event and false to continue to pass the event\n      * to lower priority active tools.\n      */\n  this.handleButtonDown = function (event, button) {\n    return false;\n  };\n\n  /**\n      * This method is called when a mouse button is released.\n      * @param {MouseEvent} event - The event object that triggered this call.\n      * @param {number} button - The button number that was released (0, 1, 2 for Left, Middle, Right respectively).\n      * Note that the button parameter value may be different that the button value indicated in the event object\n      * due to button re-mapping preferences that may be applied. This value should be respected\n      * over the value in the event object.\n      * @returns {boolean} True if this tool wishes to consume the event and false to continue to pass the event\n      * to lower priority active tools.\n      */\n  this.handleButtonUp = function (event, button) {\n    return false;\n  };\n\n  /**\n      * This method is called when a mouse motion event occurs.\n      * @param {MouseEvent} event - The event object that triggered this call.\n      * @returns {boolean} True if this tool wishes to consume the event and false to continue to pass the event\n      * to lower priority active tools.\n      */\n  this.handleMouseMove = function (event) {\n    return false;\n  };\n\n  /**\n      * This method is called when a touch gesture event occurs.\n      * @param {Event} event - The event object that triggered this call. The event.type attribute will indicate\n      * the gesture event type. This will be one of: dragstart, dragmove, dragend, panstart, panmove, panend,\n      * pinchstart, pinchmove, pinchend, rotatestart, rotatemove, rotateend, drag3start, drag3move, drag3end.\n      * The event.canvas[XY] attributes will contain the coresponding touch position.\n      * The event.scale and event.rotation attributes contain pinch scaling and two finger rotation quantities\n      * respectively. The deltaX and deltaY attributes will contain drag offsets.\n      * @returns {boolean} True if this tool wishes to consume the event and false to continue to pass the event\n      * to lower priority active tools.\n      */\n  this.handleGesture = function (event) {\n    return false;\n  };\n\n  /**\n      * This method is called when the canvas area loses focus.\n      * @param {FocusEvent} event - The event object that triggered this call.\n      * @returns {boolean} True if this tool wishes to consume the event and false to continue to pass the event\n      * to lower priority active tools.\n      */\n  this.handleBlur = function (event) {\n    return false;\n  };\n\n  /**\n      * This method is called on every active tool whenever the screen area changes.\n      * The new canvas area can be obtained from the Navigation interface via the getScreenViewport method.\n      * @see Autodesk.Viewing.Navigation\n      */\n  this.handleResize = function () {\n  };\n}","\nimport * as THREE from \"three\";\nimport { logger } from \"../logger/Logger\";\n\nexport function UnifiedCamera(clientWidth, clientHeight)\n{\n  THREE.Camera.call(this);\n\n  this.fov = 45;\n  this.near = 0.1;\n  this.far = 100000;\n  this.aspect = clientWidth / clientHeight;\n\n  this.left = -clientWidth / 2;\n  this.right = clientWidth / 2;\n  this.top = clientHeight / 2;\n  this.bottom = -clientHeight / 2;\n  this.clientWidth = clientWidth;\n  this.clientHeight = clientHeight;\n\n  this.target = new THREE.Vector3(0, 0, -1);\n  this.worldup = new THREE.Vector3(0, 1, 0);\n\n  this.orthographicCamera = new THREE.OrthographicCamera(this.left, this.right, this.top, this.bottom, this.near, this.far);\n  this.perspectiveCamera = new THREE.PerspectiveCamera(this.fov, this.aspect, this.near, this.far);\n\n  this.zoom = 1;\n\n  // Only used when using dynamic global offsets.\n  // Camera position/target are in local viewer coordinates.\n  this.globalOffset = new THREE.Vector3();\n\n  this.toPerspective();\n};\n\n//Constant FOV used to make math right for Ortho cameras.\nUnifiedCamera.ORTHO_FOV = 2 * Math.atan(0.5) * 180.0 / Math.PI;\n\nUnifiedCamera.prototype = Object.create(THREE.Camera.prototype);\n\nUnifiedCamera.prototype.clone = function (camera)\n{\n  camera = camera || new UnifiedCamera(this.right * 2.0, this.top * 2.0);\n\n  THREE.Camera.prototype.clone.call(this, camera);\n\n  camera.position.copy(this.position);\n  camera.up.copy(this.up);\n  if (this.target)\n  camera.target = this.target.clone();\n  if (this.worldup)\n  camera.worldup = this.worldup.clone();\n  if (this.worldUpTransform)\n  camera.worldUpTransform = this.worldUpTransform.clone();\n\n  camera.left = this.left;\n  camera.right = this.right;\n  camera.top = this.top;\n  camera.bottom = this.bottom;\n\n  camera.near = this.near;\n  camera.far = this.far;\n  camera.fov = this.fov;\n  camera.aspect = this.aspect;\n  camera.zoom = this.zoom;\n\n  camera.clientWidth = this.clientWidth;\n  camera.clientHeight = this.clientHeight;\n\n  camera.isPerspective = this.isPerspective;\n\n  camera.globalOffset = this.globalOffset.clone();\n\n  this.updateProjectionMatrix();\n\n  return camera;\n};\n\nUnifiedCamera.prototype.__computeFovPosition = function (fov)\n{\n  if (Math.abs(this.fov - fov) <= 0.0001)\n  return this.position.clone();\n\n  var eye = this.target.clone().sub(this.position);\n  var dir = eye.clone().normalize();\n  var oldFOV = THREE.Math.degToRad(this.fov);\n  var newFOV = THREE.Math.degToRad(fov);\n  var fovScale = Math.tan(oldFOV * 0.5) / Math.tan(newFOV * 0.5);\n\n  //If there is a pivot point, get distance based\n  //on the distance to the plane of the pivot point,\n  //because the target point is sometimes just a fixed 1 unit distance\n  //away from the camera position calculated from the direction vector\n  //and makes no sense to use as actual target\n  var distance;\n  var target;\n  if (this.pivot) {\n    //Get equation of the plane parallel to the screen, and containing the\n    //pivot point\n    var plane = new THREE.Plane().setFromNormalAndCoplanarPoint(dir.clone().negate(), this.pivot);\n    distance = plane.distanceToPoint(this.position);\n    target = dir.clone().multiplyScalar(distance).add(this.position);\n  } else {\n    distance = eye.length();\n    target = this.target;\n  }\n\n  distance *= fovScale;\n  var offset = dir.multiplyScalar(-distance);\n\n  return target.clone().add(offset);\n};\n\nUnifiedCamera.prototype.toPerspective = function ()\n{\n  // Switches to the Perspective Camera\n\n  if (!this.isPerspective && this.saveFov) {\n    this.position.copy(this.__computeFovPosition(this.saveFov));\n    this.fov = this.saveFov;\n  }\n\n  this.perspectiveCamera.aspect = this.aspect;\n  this.perspectiveCamera.near = this.near;\n  this.perspectiveCamera.far = this.far;\n\n  this.perspectiveCamera.fov = this.fov / this.zoom;\n  this.perspectiveCamera.updateProjectionMatrix();\n\n  this.projectionMatrix = this.perspectiveCamera.projectionMatrix;\n\n  this.isPerspective = true;\n};\n\nUnifiedCamera.prototype.toOrthographic = function ()\n{\n  if (this.isPerspective) {\n    this.saveFov = this.fov;\n    var newFov = UnifiedCamera.ORTHO_FOV;\n    this.position.copy(this.__computeFovPosition(newFov));\n    this.fov = newFov;\n  }\n\n  this.orthoScale = this.target.clone().sub(this.position).length();\n\n  var halfHeight = this.orthoScale * 0.5;\n  var halfWidth = halfHeight * this.aspect;\n\n  this.left = this.orthographicCamera.left = -halfWidth;\n  this.right = this.orthographicCamera.right = halfWidth;\n  this.top = this.orthographicCamera.top = halfHeight;\n  this.bottom = this.orthographicCamera.bottom = -halfHeight;\n\n  this.orthographicCamera.near = this.near;\n  this.orthographicCamera.far = this.far;\n\n  this.orthographicCamera.updateProjectionMatrix();\n\n  this.projectionMatrix = this.orthographicCamera.projectionMatrix;\n\n  this.isPerspective = false;\n};\n\nUnifiedCamera.prototype.updateProjectionMatrix = function ()\n{\n  if (this.isPerspective) {\n    this.toPerspective();\n  } else {\n    this.toOrthographic();\n  }\n};\n\nUnifiedCamera.prototype.setSize = function (width, height)\n{\n  this.aspect = width / height;\n  this.left = -width / 2;\n  this.right = width / 2;\n  this.top = height / 2;\n  this.bottom = -height / 2;\n\n};\n\n\nUnifiedCamera.prototype.setFov = function (fov)\n{\n  this.fov = fov;\n  this.updateProjectionMatrix();\n};\n\n/*\n   * Uses Focal Length (in mm) to estimate and set FOV\n   * 35mm (fullframe) camera is used if frame size is not specified;\n   * Formula based on http://www.bobatkins.com/photography/technical/field_of_view.html\n   */\nUnifiedCamera.prototype.setLens = function (focalLength, frameHeight)\n{\n  if (frameHeight === undefined) frameHeight = 24;\n\n  var fov = 2 * THREE.Math.radToDeg(Math.atan(frameHeight / (focalLength * 2)));\n\n  this.setFov(fov);\n\n  return fov;\n};\n\n/*\n     Set camera params to get a default view for a given model bbox.\n   \n      @param {Box3}     modelBox\n      @param {bool}     is2d\n      @param {number}   aspect         - aspect ratio (= width / height) \n      @param {Vector3}  up             - only for 3D\n      @param {float}    fov            - only for 3D\n      @param {Object|Camera} [outView] - optional result object\n   \n      @returns {Object} View object containing { position, target, up, isPerspective, orthoScale }\n   */\nUnifiedCamera.getViewParamsFromBox = function (bbox, is2d, aspect, up, fov, outView) {\n\n  var view = outView || {};\n\n  var size = bbox.size();\n  view.target = bbox.center();\n\n  // If outView is a Camera, position exists and cannot be replaced\n  if (!view.position) view.position = new THREE.Vector3();\n  if (!view.up) view.up = new THREE.Vector3();\n\n  if (!is2d)\n  {\n    view.isPerspective = true;\n    view.fov = fov;\n    view.up.copy(up);\n\n    view.position.copy(view.target);\n    view.position.z += 1.5 * Math.max(size.x, size.y, size.z);\n  } else\n  {\n    view.isPerspective = false;\n\n    var pageAspect = size.x / size.y;\n    var screenAspect = aspect;\n\n    //Fit the page to the screen\n    if (screenAspect > pageAspect)\n    view.orthoScale = size.y;else\n\n    view.orthoScale = size.x / screenAspect;\n\n    //2D case -- up vector is Y\n    view.up.set(0, 1, 0);\n\n    view.position.copy(view.target);\n    view.position.z += view.orthoScale;\n\n    //This is to avoid freaking out the camera / controller with co-linear up and direction\n    view.target.y += 1e-6 * size.y;\n  }\n  return view;\n};\n\n// Fit camera to model bbox\n//  @param {Box3} model bbox\n//  @param {bool} is2d\nUnifiedCamera.prototype.setViewFromBox = function (bbox, is2d) {\n  UnifiedCamera.getViewParamsFromBox(bbox, is2d, this.aspect, this.up, this.fov, this);\n  this.updateCameraMatrices();\n};\n\n// Ensure that all camera matrices are instantly up-to-date. For the default camera, all this happens automatically by the viewer\n// in different parts of setup and rendering.\n//\n// But, when setting up a separate camera yourself and using the matrices for computations, this function is essential to get correct results.\nUnifiedCamera.prototype.updateCameraMatrices = function () {\n\n  // Make sure that camera.rotation is set properly according to pos/target.\n  // For the default camera, this usually happens inside tick() function while updating the ToolController.\n  this.lookAt(this.target);\n\n  // Make sure that the camera matrices are updated based on latest camera properties.\n  // This would happen later in cmdBeginScene() otherwise.\n  this.updateProjectionMatrix();\n  this.updateMatrixWorld();\n\n  // Make sure that worldInverse is up-to-date as well.\n  // This would happen later in WebGLRendere.render() otherwise\n  this.matrixWorldInverse.getInverse(this.matrixWorld);\n};\n\n// Configure view from given view params (pos, target, up, isPerspective, orthoScale). Missing params will remain unchanged.\n//\n//  @param {Object} viewParams\n//  @param {Vector3} [viewParams.position]\n//  @param {Vector3} [viewParams.target]\n//  @param {Vector3} [viewParams.up]\n//  @param {bool}    [viewParams.isPerspective]\n//  @param {Vector3} [viewParams.orthoScale]\nUnifiedCamera.prototype.setView = function (viewParams) {\n\n  viewParams.position && this.position.copy(viewParams.position);\n  viewParams.target && this.target.copy(viewParams.target);\n  viewParams.up && this.up.copy(viewParams.up);\n  if (viewParams.isPerspective !== undefined) this.isPerspective = viewParams.isPerspective;\n  if (viewParams.orthoScale !== undefined) this.orthoScale = viewParams.orthoScale;\n\n  this.updateCameraMatrices();\n};\n\n// Computes pixel-per-unit scale at a given distance from the camera,\n// i.e. the projected screen-space length of a line of length 1.0 parallel to the viewplane at distance d.\nUnifiedCamera.prototype.pixelsPerUnitAtDistance = function (dist) {\n\n  // Handle ortho-camera case\n  if (!this.isPerspective) {\n    // Scale factor only depends on orthoScale, not on distance.\n    return this.clientHeight / this.orthoScale;\n  }\n\n  // get tan(phi/2) for horizontal aperture angle.\n  var tanPhiHalf = Math.tan(THREE.Math.degToRad(0.5 * this.fov));\n\n  // Compute view-frustum height at the given distance in world-space \n  var frustumHeight = 2.0 * dist * tanPhiHalf;\n\n  return this.clientHeight / frustumHeight;\n};\n\n// Compute pixel-per-unit scale at a given visible point in world-space.\nUnifiedCamera.prototype.pixelsPerUnitAtPoint = function (pos) {\n  var dist = this.position.distanceTo(pos);\n  return this.pixelsPerUnitAtDistance(dist);\n};\n\n// Change globalOffset. By default, we update position/target/pivot, so that the global\n// camera position keeps the same.\n//  @param {Vector3} offset\n//  @param {bool}    [preserveGlobalPosition=true] - If false, we only change the offset vector\nUnifiedCamera.prototype.setGlobalOffset = function (offset) {var preserveGlobalPosition = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : true;\n\n  // Avoid confusing effects when using camera.position as a new offset\n  if (offset === this.position || offset === this.target || offset === this.pivot) {\n    offset = offset.clone();\n  }\n\n  if (preserveGlobalPosition) {var _this$pivot;\n    this.position.add(this.globalOffset).sub(offset);\n    this.target.add(this.globalOffset).sub(offset);\n    (_this$pivot = this.pivot) === null || _this$pivot === void 0 ? void 0 : _this$pivot.add(this.globalOffset).sub(offset);\n  }\n\n  this.globalOffset.copy(offset);\n};\n\n// @param {Vector3} [target]\nUnifiedCamera.prototype.getGlobalPosition = function () {var target = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : new THREE.Vector3();\n  return target.copy(this.position).add(this.globalOffset);\n};\n\n// Transforms current view by given matrix.\n//  @param {Matrix4} matrix\nUnifiedCamera.prototype.applyMatrix4 = function (matrix) {var _this$pivot2;\n  this.position.applyMatrix4(matrix);\n  this.target.applyMatrix4(matrix);\n  (_this$pivot2 = this.pivot) === null || _this$pivot2 === void 0 ? void 0 : _this$pivot2.applyMatrix4(matrix);\n  this.up.transformDirection(matrix);\n};\n\n// Copy viewParams struct that can be used for setView(). \nUnifiedCamera.copyViewParams = function (src, dst) {\n\n  dst = dst || {};\n\n  dst.position = (dst.position || new THREE.Vector3()).copy(src.position);\n  dst.target = (dst.target || new THREE.Vector3()).copy(src.target);\n  dst.up = (dst.up || new THREE.Vector3()).copy(src.up);\n\n  dst.aspect = src.aspect;\n  dst.fov = src.fov;\n  dst.isPerspective = src.isPerspective;\n  dst.orthoScale = src.orthoScale;\n\n  return dst;\n};\n\n// Apply Matrix4 to viewParams struct.\n//  @param {Object}  params - Params to be modified. See setView() for details.\n//  @param {Matrix4} matrix\nUnifiedCamera.transformViewParams = function (params, matrix) {\n  params.position.applyMatrix4(matrix);\n  params.target.applyMatrix4(matrix);\n  params.up.transformDirection(matrix);\n};\n\n// Returns a ray according to given vector.\nUnifiedCamera.prototype.viewportToRay = function (vpVec, ray) {\n  // set two vectors with opposing z values\n  vpVec.z = -1.0;\n  var end = new THREE.Vector3(vpVec.x, vpVec.y, 1.0);\n  vpVec = vpVec.unproject(this);\n  end = end.unproject(this);\n\n  // find direction from vector to end\n  end.sub(vpVec).normalize();\n\n  if (!ray)\n  ray = new THREE.Ray();\n\n  ray.set(!this.isPerspective ? vpVec : this.position, end);\n\n  return ray;\n};\n\n//Camera is expected to have the properties of a THREE.Camera.\nUnifiedCamera.adjustOrthoCamera = function (camera, sceneBox) {\n\n  if (!camera.isPerspective) {\n    var size = sceneBox.size();\n\n    var at = camera.target.clone().sub(camera.position);\n    var targetDistance = at.length();\n    if (targetDistance > 1000 * size.length()) {\n\n      //Sometimes (Revit) the camera target is unspecified/infinite\n      //for ortho. So we pick target and distance such that\n      //initial view and orbit is about right by using a target point that is a similar\n      //distance away as camera->bbox center, but is in the\n      //direction of the at vector (which is not necessarily looking at the center)\n      var dist = camera.position.distanceTo(sceneBox.center());\n      camera.target.copy(camera.position).add(at.normalize().multiplyScalar(dist));\n    } else\n    {\n      //UnifiedCamera does not actually look at the orthoScale property. It bases\n      //the ortho projection on value derived from the position-target distance and an\n      //assumed field of view. For a well defined ortho view, we expect that\n      //the eye-target distance and ortho scale are equal. Some extractors have historically\n      //defined only one of these in a sane way (e.g. the other code path in this if condition).\n\n      if (Math.abs(targetDistance - camera.orthoScale) / targetDistance > 1e-5) {\n\n        logger.warn(\"Ortho scale does not match eye-target distance. One of them is likely wrong, but which one?\");\n\n        //This checks for ortho camera views defined in Revit bubbles. Unlike the same view in the SVF,\n        //the one in the bubble sets orthoHeight and FOV to trivial values that make no sense, while\n        //target distance is correct.\n        var isLikelyRevitView = camera.fov === 0 && camera.orthoScale === 1;\n\n        //Assume ortho scale is correct if we are not in the Revit situation above\n        var orthoScaleIsCorrect = !isLikelyRevitView;\n        if (orthoScaleIsCorrect) {\n          //This line applies orthoScale (assumed correct) to target distance (incorrect)\n          camera.position.copy(camera.target).add(at.normalize().multiplyScalar(-camera.orthoScale));\n        } else {\n          //do nothing, target distance is correct and will be used by UnifiedCamera\n        }\n      }\n    }\n  }\n};","\nimport * as THREE from \"three\";\nimport { GlobalManagerMixin } from '../application/GlobalManagerMixin';\n\n/**\n                                                                         * Variety of utilities convenient to navigation and tool development.\n                                                                         *\n                                                                         * This class is instantiated internally and made available to all registered interaction tools\n                                                                         * via their \"utilities\" property.\n                                                                         * @see {@link Autodesk.Viewing.ToolController}\n                                                                         * @param {object} viewerImpl - The viewer implementation object.\n                                                                         * @param {object} autocam - The Autocam interface object.\n                                                                         * @param {object} navigation - The Navigation interface object.\n                                                                         * @constructor\n                                                                         * @alias Autodesk.Viewing.ViewingUtilities\n                                                                         */\nexport function ViewingUtilities(viewerImplIn, autocam, navapi)\n{\n  this.autocam = autocam;\n  this.viewerImpl = viewerImplIn;\n  this.setGlobalManager(this.viewerImpl.globalManager);\n\n  var kIndicatorPixelSize = 5; // Pixels\n  var _camera = navapi.getCamera();\n  var _savePivot = {};\n  var _savePivotSet = {};\n\n  function PivotIndicator(viewerImpl)\n  {\n    var kFadeTimeMilliseconds = 500;\n    var kIndicatorColor = 0x007F00;\n    var kIndicatorOpacity = 0.6;\n\n    var myFadeTime = 0;\n    var myGeometry = new THREE.SphereGeometry(1.0);\n    var myMaterial = new THREE.MeshPhongMaterial({ color: kIndicatorColor, ambient: kIndicatorColor, opacity: kIndicatorOpacity, transparent: true });\n    var myMesh = new THREE.Mesh(myGeometry, myMaterial);\n    var myViewerImpl = viewerImpl;\n    var myPivotScale = 1.0;\n\n    myViewerImpl.createOverlayScene(\"pivot\");\n    myMesh.visible = false;\n\n    this.shown = function ()\n    {\n      return myMesh.visible;\n    };\n\n    this.show = function (position, scale, fade)\n    {\n      myMesh.scale.x = scale * myPivotScale;\n      myMesh.scale.y = scale * myPivotScale;\n      myMesh.scale.z = scale * myPivotScale;\n\n      myMesh.position.set(position.x, position.y, position.z);\n      myMaterial.opacity = kIndicatorOpacity;\n\n      myMesh.visible = true;\n      myViewerImpl.addOverlay(\"pivot\", myMesh);\n      myViewerImpl.invalidate(false, false, true);\n\n      if (fade)\n      {\n        myFadeTime = Date.now() + kFadeTimeMilliseconds;\n      } else\n\n      myFadeTime = 0;\n    };\n\n    this.hide = function ()\n    {\n      if (myMesh.visible)\n      {\n        myMesh.visible = false;\n        myViewerImpl.removeOverlay(\"pivot\", myMesh);\n        myViewerImpl.invalidate(false, false, true);\n        myFadeTime = 0;\n      }\n    };\n\n    this.fade = function ()\n    {\n      if (myFadeTime > 0)\n      {\n        var fadeDelta = myFadeTime - Date.now();\n\n        if (fadeDelta <= 0)\n        {\n          this.hide();\n          return true;\n        }\n        var opacity = fadeDelta / kFadeTimeMilliseconds * kIndicatorOpacity;\n        myMaterial.opacity = opacity;\n        return true;\n      }\n      return false;\n    };\n\n    this.fading = function ()\n    {\n      return myFadeTime > 0;\n    };\n\n    /**\n        * Changes the pivot graphic size.\n        * Set default size with scale value of 1.\n        */\n    this.setSize = function (scale) {\n      myPivotScale = scale;\n    };\n\n    /**\n        * Change Pivot color.\n        * Example, red is 0xFF0000 \n        */\n    this.setColor = function (color, opacity) {\n      myMaterial.color = new THREE.Color(color);\n\n      // opacity is optional\n      if (opacity !== undefined) {\n        kIndicatorOpacity = opacity;\n        myMaterial.opacity = kIndicatorOpacity;\n      }\n    };\n  }\n\n  var _pivotIndicator = new PivotIndicator(this.viewerImpl);\n\n  function computeOrthogonalUp(pos, coi, worldUp)\n  {\n    var eye = coi.clone().sub(pos);\n    if (eye.lengthSq() === 0.0) // Invalid view?\n      return eye.copy(worldUp);\n\n    var right = eye.clone().cross(worldUp);\n    if (right.lengthSq() === 0)\n    {\n      // If eye and up are colinear, perturb eye\n      // to get a valid result:\n      if (worldUp.z > worldUp.y)\n      eye.y -= 0.0001;else\n\n      eye.z -= 0.0001;\n\n      right.crossVectors(eye, worldUp);\n    }\n    return right.cross(eye).normalize();\n  }\n\n  /**\n     * This method triggers a camera view transition as specified by the parameters.\n     *  @param {THREE.Vector3} pos - The new world space position of the camera.\n     *  @param {THREE.Vector3} coi - The new center of interest (look at point).\n     *  @param {number} fov - The new field of view for the camera in degrees.\n     *  @param {THREE.Vector3} up - The new camera up direction.\n     *  @param {THREE.Vector3} worldUp - The new world up direction.\n     *  @param {boolean} reorient - If true the given camera up parameter is ignored\n     *  and a new up direction will be calculated to be aligned with the given world up direction.\n     *  @param {THREE.Vector3} pivot - The new pivot point.\n     */\n  this.transitionView = function (pos, coi, fov, up, worldUp, reorient, pivot)\n  {\n    worldUp = worldUp || navapi.getWorldUpVector();\n\n    var upVec = reorient ? computeOrthogonalUp(pos, coi, worldUp) : up;\n    if (!upVec)\n    upVec = _camera.up;\n\n    pivot = pivot || coi;\n\n    var targetView = {\n      position: pos,\n      center: coi,\n      pivot: pivot,\n      fov: fov,\n      up: upVec,\n      worldUp: worldUp,\n      isOrtho: _camera.isPerspective === false };\n\n    autocam.goToView(targetView);\n  };\n\n  /**\n      * This method triggers a camera view transition to the registered home view for the current scene.\n      */\n  this.goHome = function ()\n  {\n    this.viewerImpl.track({ name: 'navigation/home', aggregate: 'count' });\n    autocam.goHome();\n  };\n\n  /**\n      * This method performs a hit test with the current model using a ray cast from the given screen coordinates.\n      *  @param {number} x - The normalized screen x coordinate in [0, 1].\n      *  @param {number} y - The normalized screen y coordinate in [0, 1].\n      *  @returns {THREE.Vector3} The world space hit position or null if no object was hit.\n      */\n  this.getHitPoint = function (x, y)\n  {\n    var result = this.viewerImpl.hitTestViewport(navapi.screenToViewport(x, y), false);\n    return result ? result.intersectPoint : null;\n  };\n\n  /**\n      * This method activates the in scene pivot indicator.\n      * The pivot is positioned at the current camera's pivot point.\n      * @param {boolean} fadeIt - If true the indicator will be displayed and then fade away after a short period.\n      * @see {@link Autodesk.Viewing.Navigation}\n      */\n  this.activatePivot = function (fadeIt)\n  {\n    // Only show pivot for 3D models\n    if (!this.viewerImpl.model || this.viewerImpl.model.is2d())\n    return;\n\n    var distance = _camera.isPerspective ? navapi.getPivotPlaneDistance() :\n    navapi.getEyeVector().length();\n    var fov = navapi.getVerticalFov();\n    var worldHeight = 2.0 * distance * Math.tan(THREE.Math.degToRad(fov * 0.5));\n\n    var viewport = navapi.getScreenViewport();\n    var _window = this.getWindow();\n    var devicePixelRatio = _window.devicePixelRatio || 1;\n    var indicatorSize = kIndicatorPixelSize * worldHeight / (viewport.height * devicePixelRatio);\n\n    _pivotIndicator.show(navapi.getPivotPoint(), indicatorSize, fadeIt);\n  };\n\n  /**\n      * This method changes the display state of the in scene pivot indicator.\n      * If the current scene is 2D this method has no effect.\n      * @param {boolean} state - The requested display state for the indicator.\n      * @param {boolean} fadeIt - If true and \"state\" is also true, the indicator will be displayed\n      * and then fade away after a short period.\n      * @see {@link Autodesk.Viewing.Navigation}\n      */\n  this.pivotActive = function (state, fadeIt)\n  {\n    state = state && !navapi.getIs2D(); // Currently disabled in 2D mode.\n\n    fadeIt = fadeIt || false;\n\n    if (!state && _pivotIndicator.shown())\n    {\n      _pivotIndicator.hide();\n      return;\n    }\n    if (state)\n    this.activatePivot(fadeIt);\n  };\n\n  /**\n      * Invoke this method to refresh the pivot indicator and continue its fading action if required.\n      */\n  this.pivotUpdate = function ()\n  {\n    if (_pivotIndicator.shown() && _pivotIndicator.fade())\n    this.viewerImpl.invalidate(false, false, true);\n  };\n\n  /**\n      * Set the current pivot point and pivot set flag.\n      * If the pivot indicator is active its position will be updated accordingly. If a temporary pivot was previously applied, its saved state will be cleared.\n      * @param {THREE.Vector3} newPivot - The world space position of the new pivot point.\n      * @param {boolean} preserveView - If false the camera's view direction will change\n      * to look at the new pivot point. If true the camera's view will not be changed.\n      * @param {boolean} isset - The new state of the pivot set flag.\n      * @see {@link Autodesk.Viewing.Navigation}\n      */\n  this.setPivotPoint = function (newPivot, preserveView, isset)\n  {\n    navapi.setPivotPoint(newPivot);\n\n    if (!preserveView)\n    navapi.setTarget(newPivot);\n\n    if (isset)\n    navapi.setPivotSetFlag(true);\n\n    this.setTemporaryPivot(null);\n\n    // Disallow showing the pivot when in 2D.\n    if (navapi.getIs2D())\n    return;\n\n    if (_pivotIndicator.shown()) // The pivot indicator location may need updating:\n      this.activatePivot(_pivotIndicator.fading());\n  };\n\n  /**\n      * Save a copy of the current pivot point and pivot set flag.\n      * @param {string} name - Optional unique name of the saved location.\n      */\n  this.savePivot = function (name)\n  {\n    if (!name)\n    name = \"default\";\n\n    _savePivot[name] = navapi.getPivotPoint();\n    _savePivotSet[name] = navapi.getPivotSetFlag();\n  };\n\n  /**\n      * Restore the saved copy of the current pivot point and pivot set flag.\n      * Once restored the saved value is erased.\n      * @param {string} name - Optional unique name of the saved location.\n      */\n  this.restorePivot = function (name)\n  {\n    if (!name)\n    name = \"default\";\n\n    if (_savePivot[name])\n    {\n      var set = _savePivotSet[name]; // Get value before calling setPivotPoint\n      this.setPivotPoint(_savePivot[name], true, set);\n      if (!set)\n      {\n        // Force the flag off, setPivotPoint only turns it on.\n        navapi.setPivotSetFlag(false);\n      }\n      delete _savePivot[name];\n      delete _savePivotSet[name];\n    }\n  };\n\n  /**\n      * Allows the caller to save the current pivot and replace it with a new location.\n      * If while the temporary pivot is active a new pivot is set via the setPivotPoint method,\n      * the saved pivot will be cleared to avoid restoring an out of date pivot location.\n      * @param {THREE.Vector3} newPivot - The new pivot to be assigned or null to clear any previously saved pivot.\n      */\n  this.setTemporaryPivot = function (newPivot)\n  {\n    if (newPivot)\n    {\n      var pivot = navapi.getPivotPoint();\n      var pivotSet = navapi.getPivotSetFlag();\n\n      this.setPivotPoint(newPivot, true, pivotSet);\n\n      _savePivot[\"TEMP\"] = pivot;\n      _savePivotSet[\"TEMP\"] = pivotSet;\n    } else\n\n    {\n      delete _savePivot[\"TEMP\"];\n      delete _savePivotSet[\"TEMP\"];\n    }\n  };\n\n  /**\n      * Restore a pivot value that was saved by a call to setTemporary Pivot.\n      */\n  this.removeTemporaryPivot = function ()\n  {\n    this.restorePivot(\"TEMP\");\n  };\n\n  /**\n      * Changes the pivot graphic size.\n      * @param {Number} scale - Default size value is 1\n      */\n  this.setPivotSize = function (scale) {\n    _pivotIndicator.setSize(scale);\n  };\n\n  /**\n      * Change pivot color and opacity.\n      * Example, to get red 100% solid (non-transparent) use setPivotColor(0xFF0000, 1)\n      * @param {Number} color - RBG Hex color.\n      * @param {Number} [opacity] - Opacity value from 0 (transparent) to 1 (opaque).\n      */\n  this.setPivotColor = function (color, opacity) {\n    _pivotIndicator.setColor(color, opacity);\n  };\n\n  /**\n      * Return the bounding box of the current model or model selection.\n      * @param {boolean} ignoreSelection - If true the current selection is ignored and the model bounds is returned.\n      * @returns {THREE.Box3}\n      */\n  this.getBoundingBox = function (ignoreSelection)\n  {\n    return this.viewerImpl.getFitBounds(ignoreSelection);\n  };\n\n  /**\n      * Request a camera transition to fit the current model or model selection into the view frustum.\n      * @param {boolean} immediate - If true the transition will be immediate,\n      * otherwise animated over a short time period.\n      * @returns {object} - Fit positioning information with properties \"position\" and \"target\".\n      */\n  this.fitToView = function (immediate)\n  {\n    this.viewerImpl.track({ name: 'navigation/fit', aggregate: 'count' });\n    this.viewerImpl.fitToView(this.viewerImpl.selector.getAggregateSelection(), immediate);\n    this.activatePivot(true);\n  };\n\n  this.update = function ()\n  {\n    if (navapi.getRequestFitToView() && !navapi.getTransitionActive())\n    {\n      navapi.setRequestFitToView(false);\n      this.fitToView();\n    }\n    if (navapi.getRequestHomeView() && !navapi.getTransitionActive())\n    {\n      navapi.setRequestHomeView(false);\n      this.goHome();\n    }\n    var request = navapi.getRequestTransition();\n    if (request && !navapi.getTransitionActive())\n    {\n      navapi.setRequestTransition(false);\n      this.transitionView(request.position, request.coi, request.fov, request.up, request.worldUp, request.reorient, request.pivot);\n    }\n    return false;\n  };\n}\n\nGlobalManagerMixin.call(ViewingUtilities.prototype);","function _typeof(obj) {\"@babel/helpers - typeof\";if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {_typeof = function _typeof(obj) {return typeof obj;};} else {_typeof = function _typeof(obj) {return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;};}return _typeof(obj);}\nimport { logger } from \"../logger/Logger\";\nimport * as et from \"../application/EventTypes\";\n\nexport function VisibilityManager(viewerImpl, model) {\n  this.viewerImpl = viewerImpl;\n\n  //Currently the visibility manager works on a single model only\n  //so we make this explicit here.\n  this.model = model;\n\n  // Keep track of isolated nodes\n  this.isolatedNodes = [];\n\n  // Keeps track of hidden nodes. Only applies when there's no isolated node being tracked.\n  this.hiddenNodes = [];\n}\n\nVisibilityManager.prototype.getInstanceTree = function () {\n  if (this.model)\n  return this.model.getData().instanceTree;else\n\n  return null;\n};\n\nVisibilityManager.prototype.getIsolatedNodes = function () {\n  return this.isolatedNodes.slice(0);\n};\n\nVisibilityManager.prototype.getHiddenNodes = function () {\n  return this.hiddenNodes.slice(0);\n};\n\n/** @params {bool} - visible flag applied to all dbIds/fragments. */\nVisibilityManager.prototype.setAllVisibility = function (visible) {\n\n  var root = this.model ? this.model.getRootId() : null;\n  if (root) {\n    // if we have an instance tree, we call setVisible on the root node\n    this.setVisibilityOnNode(root, visible);\n  }\n\n  // 2D datasets may need to call setAllVisibility on the model. This can have two possible reasons:\n  //  a) they may have no instance tree, so that setting visibility on root (as above) is not possible.\n  //  b) even if they have an instance tree, setting visibility on root node will only reach selectable ids.\n  //     2D datasets may also contain unselectable objects with id <=0. In this case, the call below\n  //     is needed to hide/show these as well when using isolate/show-all.\n  var is2d = this.model.getData().is2d;\n  if (is2d) {\n    this.model.setAllVisibility(visible);\n  }\n};\n\nVisibilityManager.prototype.isNodeVisible = function (dbId) {\n  var it = this.getInstanceTree();\n  if (it) {\n    // get visibility from instance tree\n    return !it.isNodeHidden(dbId);\n  } else {\n    // If there is no instance tree, we have ids, but no hierarchy.\n    // Therefore, an id is only hidden if it appears in hiddenNodes or\n    // if there are isolated nodes and dbId is not among these.\n    return this.hiddenNodes.indexOf(dbId) == -1 && (this.isolatedNodes.length == 0 || this.isolatedNodes.indexOf(dbId) != -1);\n  }\n};\n\nVisibilityManager.prototype.isolate = function (node) {\n  var it = this.getInstanceTree();\n  var rootId = it ? it.getRootId() : null;\n  var isRoot = typeof node == \"number\" && node === rootId ||\n  _typeof(node) == \"object\" && node.dbId === rootId;\n\n  if (node && !isRoot) {\n    this.isolateMultiple(Array.isArray(node) ? node : [node]);\n  } else {\n    this.isolateNone();\n  }\n};\n\nVisibilityManager.prototype.isolateNone = function () {\n\n  this.model.setAllVisibility(true);\n  this.viewerImpl.sceneUpdated(true);\n\n  this.setAllVisibility(true);\n\n  this.hiddenNodes = [];\n  this.isolatedNodes = [];\n  this.viewerImpl.invalidate(true);\n};\n\n//Makes the children of a given node visible and\n//everything else not visible\nVisibilityManager.prototype.isolateMultiple = function (nodeList) {\n\n  //If given nodelist is null or is an empty array or contains the whole tree\n  if (!nodeList || nodeList.length == 0) {\n    this.isolateNone();\n  } else\n  {\n\n    // For 3D, visibility is controlled via MESH_VISIBLE flag.\n    // For 2D, visibility can only be contolled via a texture in MaterialManager. This already\n    // happens in the setVisibilityOnNode(..) call above.\n    if (!this.model.getData().is2d) {\n      this.model.setAllVisibility(false);\n      this.viewerImpl.sceneUpdated(true);\n    }\n\n    // Call this.setAllVisibility after this.model.setAllVisibility so\n    // the locked visibility flag can be used to display locked dbids\n    // after they are hidden by this.model.setAllVisibility.\n    this.setAllVisibility(false);\n\n    // Needs to happen after setVisibilityOnNode(root).\n    this.isolatedNodes = nodeList.slice(0);\n    this.hiddenNodes = [];\n\n    for (var i = 0; i < nodeList.length; i++) {\n      this.setVisibilityOnNode(nodeList[i], true);\n    }\n  }\n  //force a repaint and a clear\n  this.viewerImpl.invalidate(true);\n};\n\n\n//Makes the children of a given node visible and\n//everything else not visible\nVisibilityManager.prototype.hide = function (node) {var fireEvent = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : true;\n\n  var event;\n\n  if (Array.isArray(node)) {\n    for (var i = 0; i < node.length; ++i) {\n      this.setVisibilityOnNode(node[i], false);\n    }\n\n    if (node.length > 0) {\n      event = { type: et.HIDE_EVENT, nodeIdArray: node, model: this.model };\n    }\n  } else {\n    this.setVisibilityOnNode(node, false);\n    event = { type: et.HIDE_EVENT, nodeIdArray: [node], model: this.model };\n  }\n\n  if (event && fireEvent)\n  this.viewerImpl.api.dispatchEvent(event);\n};\n\nVisibilityManager.prototype.show = function (node) {\n\n  var event;\n\n  if (Array.isArray(node)) {\n    for (var i = 0; i < node.length; ++i) {\n      this.setVisibilityOnNode(node[i], true);\n    }\n\n    if (node.length > 0) {\n      event = { type: et.SHOW_EVENT, nodeIdArray: node, model: this.model };\n    }\n  } else {\n    this.setVisibilityOnNode(node, true);\n    event = { type: et.SHOW_EVENT, nodeIdArray: [node], model: this.model };\n  }\n\n  if (event)\n  this.viewerImpl.api.dispatchEvent(event);\n};\n\nVisibilityManager.prototype.toggleVisibility = function (node) {\n  var hidden = this.getInstanceTree().isNodeHidden(node);\n  this.setVisibilityOnNode(node, hidden); //Note -- toggle visibility, so we want !!hidden => hidden\n\n  var event = { type: hidden ? et.SHOW_EVENT : et.HIDE_EVENT, nodeIdArray: [node], model: this.model };\n  this.viewerImpl.api.dispatchEvent(event);\n};\n\nVisibilityManager.prototype.setVisibilityOnNode = function (node, visible) {\n\n  var viewer = this.viewerImpl;\n  var model = this.model;\n  var instanceTree = this.getInstanceTree();\n  var hidden = !visible;\n  var is2d = model.getData().is2d;\n  var matMan = this.viewerImpl.matman();\n\n  if (instanceTree) {\n    //Recursively process the tree under the root (recursion is inclusive of the root)\n    instanceTree.enumNodeChildren(node, function (dbId) {\n\n      var visibleLocked = instanceTree.isNodeVisibleLocked(dbId);\n\n      instanceTree.setNodeHidden(dbId, hidden && !visibleLocked);\n\n      if (is2d) {\n        // If dbId is otg, we need to map back to original dbIds, because the\n        // vertex buffer contain original dbIds.\n        var origDbId = model.reverseMapDbId(dbId);\n\n        model.getFragmentList().setObject2DGhosted(origDbId, !visible && !visibleLocked);\n      } else {\n        instanceTree.enumNodeFragments(dbId, function (fragId) {\n          model.setVisibility(fragId, visible || visibleLocked);\n        }, false);\n      }\n    }, true);\n  } else {\n    //No instance tree, assume fragId = dbId\n    if (is2d) {\n      model.getFragmentList().setObject2DGhosted(node, !visible);\n    } else {\n      model.setVisibility(node, visible);\n    }\n  }\n\n  viewer.sceneUpdated(true);\n  this.updateNodeVisibilityTracking(node, visible);\n};\n\nVisibilityManager.prototype.updateNodeVisibilityTracking = function (node, visible) {\n\n  // Update hidden tracking array.\n  var toVisible = visible;\n  if (this.isolatedNodes.length > 0) {\n    var isoIndex = this.isolatedNodes.indexOf(node);\n    if (toVisible && isoIndex === -1) {\n      this.isolatedNodes.push(node);\n    } else\n    if (!toVisible && isoIndex !== -1) {\n      this.isolatedNodes.splice(isoIndex, 1);\n\n      // When there are no more isolated nodes, it means that the whole model is now invisible\n      if (this.isolatedNodes.length === 0) {\n        this.hiddenNodes = [this.model.getRootId()];\n      }\n    }\n  } else {\n    var hidIndex = this.hiddenNodes.indexOf(node);\n    if (!toVisible && hidIndex === -1) {\n      this.hiddenNodes.push(node);\n    } else\n    if (toVisible && hidIndex !== -1) {\n      this.hiddenNodes.splice(hidIndex, 1);\n    }\n  }\n\n  // When operating with the node, we can get simplify stuff.\n  var instanceTree = this.getInstanceTree();\n  if (instanceTree && instanceTree.root && instanceTree.root.dbId === node) {\n    if (visible) {\n      this.isolatedNodes = [];\n      this.hiddenNodes = [];\n    } else {\n      this.isolatedNodes = [];\n      this.hiddenNodes = [node];\n    }\n  }\n};\n\nVisibilityManager.prototype.toggleNodeVisibleLocked = function (node) {\n  var locked = this.getInstanceTree().isNodeVisbileLocked(node);\n  this.lockNodeVisible(node, !locked);\n};\n\nVisibilityManager.prototype.lockNodeVisible = function (nodeList, locked) {var _this2 = this;\n\n  var viewer = this.viewerImpl;\n  var model = this.model;\n  var instanceTree = this.getInstanceTree();\n  var is2d = model.getData().is2d;\n\n  if (instanceTree) {\n    var lockOneNode = function lockOneNode(node) {\n      //Recursively process the tree under the root (recursion is inclusive of the root)\n      instanceTree.enumNodeChildren(node, function (dbId) {\n\n        instanceTree.lockNodeVisible(dbId, locked);\n        if (locked) {\n          instanceTree.setNodeHidden(dbId, false);\n\n          if (is2d) {\n            // If dbId is otg, we need to map back to original dbIds, because the\n            // vertex buffer contain original dbIds.\n            var origDbId = model.reverseMapDbId(dbId);\n\n            model.getFragmentList().setObject2DGhosted(origDbId, false);\n          } else {\n            instanceTree.enumNodeFragments(dbId, function (fragId) {\n              model.setVisibility(fragId, true);\n            }, false);\n          }\n        }\n      }, true);\n\n      if (locked) {\n        viewer.sceneUpdated(true);\n        _this2.updateNodeVisibilityTracking(node, locked);\n      }\n    };\n\n    if (Array.isArray(nodeList)) {\n      nodeList.forEach(lockOneNode);\n    } else {\n      lockOneNode(nodeList);\n    }\n  }\n};\n\nVisibilityManager.prototype.isNodeVisibleLocked = function (node) {\n  var instanceTree = this.getInstanceTree();\n  return instanceTree && instanceTree.isNodeVisibleLocked(node);\n};\n\nVisibilityManager.prototype.setNodeOff = function (node, isOff, nodeChildren, nodeFragments) {\n  var viewer = this.viewerImpl;\n  var model = this.model;\n  var instanceTree = this.getInstanceTree();\n  var is2d = model.getData().is2d;\n\n  if (!instanceTree) {\n    if (is2d) {\n      model.getFragmentList().setObject2DVisible(node, !isOff);\n    } else {\n      model.getFragmentList().setFragOff(node, isOff);\n    }\n    viewer.sceneUpdated(true);\n    return;\n  }\n\n  if (nodeChildren && nodeFragments) {\n    var dbId, fragId;\n    if (is2d) {\n      for (var i = 0; i < nodeChildren.length; ++i) {\n        dbId = nodeChildren[i];\n        instanceTree.setNodeOff(dbId, isOff);\n        // If dbId is otg, we need to map back to original dbIds, because the\n        // vertex buffer contain original dbIds.\n        var origDbId = model.reverseMapDbId(dbId);\n        model.getFragmentList().setObject2DVisible(origDbId, !isOff);\n      }\n    } else {\n      for (var _i = 0; _i < nodeChildren.length; ++_i) {\n        dbId = nodeChildren[_i];\n        instanceTree.setNodeOff(dbId, isOff);\n      }\n      for (var _i2 = 0; _i2 < nodeFragments.length; ++_i2) {\n        fragId = nodeFragments[_i2];\n        model.getFragmentList().setFragOff(fragId, isOff);\n      }\n    }\n  } else {\n    //Recursively process the tree under the root (recursion is inclusive of the root)\n    instanceTree.enumNodeChildren(node, function (dbId) {\n\n      instanceTree.setNodeOff(dbId, isOff);\n\n      if (is2d) {\n        // If dbId is otg, we need to map back to original dbIds, because the\n        // vertex buffer contain original dbIds.\n        var origDbId = model.reverseMapDbId(dbId);\n\n        model.getFragmentList().setObject2DVisible(origDbId, !isOff);\n      } else {\n        instanceTree.enumNodeFragments(dbId, function (fragId) {\n          model.getFragmentList().setFragOff(fragId, isOff);\n        }, false);\n      }\n\n    }, true);\n  }\n\n  viewer.sceneUpdated(true);\n};\n\n\nexport function MultiModelVisibilityManager(viewer) {\n\n  this.viewerImpl = viewer;\n  this.models = [];\n\n}\n\nMultiModelVisibilityManager.prototype.addModel = function (model) {\n  if (this.models.indexOf(model) == -1) {\n    model.visibilityManager = new VisibilityManager(this.viewerImpl, model);\n    this.models.push(model);\n  }\n};\n\nMultiModelVisibilityManager.prototype.removeModel = function (model) {\n  var idx = this.models.indexOf(model);\n\n  // clear visibility states (revert all ghosting)\n  model.visibilityManager.isolateNone();\n\n  model.visibilityManager = null;\n  this.models.splice(idx, 1);\n};\n\nMultiModelVisibilityManager.prototype.warn = function () {\n  if (this.models.length > 1) {\n    logger.warn(\"This selection call does not yet support multiple models.\");\n  }\n};\n\n/**\r\n    * Get a list of all dbIds that are currently isolated, grouped by model.\r\n    *\r\n    * @returns {Array} Containing objects with `{ model: <instance>, ids: Number[] }`.\r\n    * @private\r\n    */\nMultiModelVisibilityManager.prototype.getAggregateIsolatedNodes = function () {\n\n  var res = [];\n  var _models = this.models;\n  for (var i = 0; i < _models.length; i++) {\n    var nodes = _models[i].visibilityManager.getIsolatedNodes();\n    if (nodes && nodes.length)\n    res.push({ model: _models[i], ids: nodes });\n  }\n  return res;\n};\n\nMultiModelVisibilityManager.prototype.getIsolatedNodes = function (model) {\n  if (!model) {\n    this.warn();\n    model = this.models[0];\n  }\n  return model.visibilityManager.getIsolatedNodes();\n};\n\nMultiModelVisibilityManager.prototype.getAggregateHiddenNodes = function () {\n  var res = [];\n  var _models = this.models;\n  for (var i = 0; i < _models.length; i++) {\n    var nodes = _models[i].visibilityManager.getHiddenNodes();\n    if (nodes && nodes.length)\n    res.push({ model: _models[i], ids: nodes });\n  }\n  return res;\n};\n\nMultiModelVisibilityManager.prototype.getHiddenNodes = function (model) {\n  if (!model) {\n    this.warn();\n    model = this.models[0];\n  }\n  return model.visibilityManager.getHiddenNodes();\n};\n\nMultiModelVisibilityManager.prototype.isNodeVisible = function (model, dbId) {\n  if (!model) {\n    this.warn();\n    model = this.models[0];\n  }\n  return model.visibilityManager.isNodeVisible(dbId);\n};\n\nMultiModelVisibilityManager.prototype.isolate = function (node, model) {\n  if (!model) {\n    this.warn();\n    model = this.models[0];\n  }\n  model.visibilityManager.isolate(node);\n  fireAggregateIsolationChangedEvent(this);\n};\n\n/**\r\n    * Isolate nodes (dbids) associated with a model.\r\n    * @param {object} isolation - isolation object. contains a model and dbids to isolate\r\n    * @param {Autodesk.Viewing.Model} isolation.model - Model\r\n    * @param {number[]} isolation.ids - dbids to hide\r\n    * @param {object} [options] - custom options\r\n    * @param {boolean} [options.hideLoadedModels] - if set to true the visibility of the other loaded models will not change. \r\n    */\nMultiModelVisibilityManager.prototype.aggregateIsolate = function (isolation, options) {\n  if (!isolation || isolation.length === 0) {\n    // all visible\n    for (var i = 0; i < this.models.length; ++i) {\n      this.models[i].visibilityManager.isolateNone();\n    }\n  } else {\n    // Something's isolated\n    var modelsCopy = this.models.concat();\n    for (var i = 0; i < isolation.length; ++i) {\n      var model = isolation[i].model;\n      var ids = isolation[i].ids || isolation[i].selection;\n\n      var index = modelsCopy.indexOf(model);\n      modelsCopy.splice(index, 1);\n\n      model.visibilityManager.isolate(ids);\n    }\n\n    var hideLoadedModels = options ?\n    options.hideLoadedModels !== undefined && options.hideLoadedModels :\n    true;\n\n    while (modelsCopy.length && hideLoadedModels) {\n      modelsCopy.pop().visibilityManager.setAllVisibility(false);\n    }\n  }\n  fireAggregateIsolationChangedEvent(this);\n};\n\n//Makes the children of a given node visible and\n//everything else not visible\nMultiModelVisibilityManager.prototype.hide = function (node, model) {\n  if (!model) {\n    this.warn();\n    model = this.models[0];\n  }\n  model.visibilityManager.hide(node);\n\n};\n\n/**\r\n    * Hide the dbids associated in a model\r\n    * Fires the Autodesk.Viewing.AGGREGATE_HIDDEN_CHANGED_EVENT.\r\n    * @param {Object[]} hide - [ { model: Model, ids: [ Number, ... ] }, ... ]\r\n    */\nMultiModelVisibilityManager.prototype.aggregateHide = function (hide) {\n  if (!hide || hide.length === 0) return;\n  for (var i = 0; i < hide.length; ++i) {\n    var model = hide[i].model;\n    var ids = hide[i].ids || hide[i].selection;\n    // Fire the av.HIDE_EVENT only if there is one entry.\n    model.visibilityManager.hide(ids, this.models.length === 1);\n  }\n\n  // Get the hidden nodes\n  var hidden = this.getAggregateHiddenNodes();\n  // Dispatch the aggregate hidden event\n  var event = {\n    type: et.AGGREGATE_HIDDEN_CHANGED_EVENT,\n    hidden: hidden };\n\n  this.viewerImpl.api.dispatchEvent(event);\n};\n\nMultiModelVisibilityManager.prototype.show = function (node, model) {\n  if (!model) {\n    this.warn();\n    model = this.models[0];\n  }\n  model.visibilityManager.show(node);\n};\n\nMultiModelVisibilityManager.prototype.toggleVisibility = function (node, model) {\n  if (!model) {\n    this.warn();\n    model = this.models[0];\n  }\n  model.visibilityManager.toggleVisibility(node);\n};\n\nMultiModelVisibilityManager.prototype.setVisibilityOnNode = function (node, visible, model) {\n  if (!model) {\n    this.warn();\n    model = this.models[0];\n  }\n  model.visibilityManager.setVisibilityOnNode(node, visible);\n};\n\nMultiModelVisibilityManager.prototype.toggleVisibleLocked = function (node, model) {\n  if (!model) {\n    this.warn();\n    model = this.models[0];\n  }\n  model.visibilityManager.toggleVisibleLocked(node);\n};\n\nMultiModelVisibilityManager.prototype.lockNodeVisible = function (node, locked, model) {\n  if (!model) {\n    this.warn();\n    model = this.models[0];\n  }\n  model.visibilityManager.lockNodeVisible(node, locked);\n};\n\nMultiModelVisibilityManager.prototype.isNodeVisibleLocked = function (node, model) {\n  if (!model) {\n    this.warn();\n    model = this.models[0];\n  }\n  return model.visibilityManager.isNodeVisibleLocked(node, model);\n};\n\nMultiModelVisibilityManager.prototype.setNodeOff = function (node, isOff, model, nodeChildren, nodeFragments) {\n  if (!model) {\n    this.warn();\n    model = this.models[0];\n  }\n  model.visibilityManager.setNodeOff(node, isOff, nodeChildren, nodeFragments);\n};\n\nfunction fireAggregateIsolationChangedEvent(_this) {\n\n  var isolation = _this.getAggregateIsolatedNodes();\n\n  // Legacy event\n  if (_this.models.length === 1) {\n    var event = {\n      type: et.ISOLATE_EVENT,\n      nodeIdArray: isolation.length ? isolation[0].ids : [],\n      model: _this.models[0] };\n\n    _this.viewerImpl.api.dispatchEvent(event);\n  }\n\n  // Always fire\n  var event = {\n    type: et.AGGREGATE_ISOLATION_CHANGED_EVENT,\n    isolation: isolation };\n\n  _this.viewerImpl.api.dispatchEvent(event);\n};","\nimport * as THREE from \"three\";\nimport * as et from \"../application/EventTypes\";\n\n// TODO: Pass in the api instead of the impl, don't use the impl object.\nexport function WorldUpTool(viewerImpl, viewerApi)\n{\n  var kRingSizeMin = 0.35; // Proportion of screen height\n  var kRingSizeMax = 0.80; // Proportion of screen height\n  var kRingSizeDefault = 0.65; // Proportion of screen height\n\n  var _navapi = viewerApi.navigation;\n  var _camera = _navapi.getCamera();\n  var _names = [\"worldup\"];\n  var self = this;\n\n  // Returns the projection of (x,y,z) onto the plane with this unit normal\n  var projectAxis = function ()\n  {\n    var projectionVec = new THREE.Vector3();\n\n    return function (x, y, z, normal)\n    {\n      var vec = new THREE.Vector3(x, y, z);\n      var projectionLength = normal.dot(vec);\n      projectionVec.copy(normal);\n      projectionVec.multiplyScalar(projectionLength);\n      return vec.sub(projectionVec);\n    };\n  }();\n\n  // /** @constructor */\n  function RollInteraction(viewerImpl, camera)\n  {\n    var kRollColor = 0xBBBBBB;\n    var kHudFov = 30;\n    var kHudWorldScale = 2.0 * Math.tan(THREE.Math.degToRad(kHudFov * 0.5));\n\n    var myMaterial = new THREE.MeshPhongMaterial({\n      color: kRollColor,\n      ambient: kRollColor,\n      opacity: 0.5,\n      transparent: true,\n      depthTest: false,\n      depthWrite: false });\n\n\n    // Preallocate these as work objects:\n    var myVec1 = new THREE.Vector3();\n    var myVec2 = new THREE.Vector3();\n    var myRotate = new THREE.Quaternion();\n\n    // Use our own camera for the Roll HUD:\n    // var myCamera = camera.clone();   // There's a bug in Object3D.clone()\n    var myCamera = new THREE.PerspectiveCamera(kHudFov, camera.aspect, camera.near, camera.far);\n    var mySceneCamera = camera;\n    var myRingScale = 1.0;\n    var myRingSize = 1.0;\n    var myLookAtPoint = null;\n    var myReferenceCircle = null;\n    var myReferenceXaxis = null;\n    var myReferenceYaxis = null;\n    var myReferenceZaxis = null;\n    var myReferenceGeometry = null;\n    var myReferenceUp = null;\n    var mySnapPoints = null;\n    var mySnapFlags = null;\n    var mySnapAngles = new Array(6);\n    var myClosestAngle = 0.0;\n    var myRollAngle = 0.0;\n    var myAnglesFlipped = false;\n    var myCurrentlySnapped = true; // Assume initially true\n    var mySnappedRoll = 0.0;\n    var kSnapInThreshold = 5.0 * Math.PI / 180.0;\n    var kSnapOutThreshold = 7.0 * Math.PI / 180.0;\n    var myDistance = 1.0;\n\n    var kNOSNAP = 1e3;\n    var kAliasLengthThreshold = 0.1;\n\n    viewerImpl.createOverlayScene(\"roll\", null, null, myCamera);\n\n    function angleDiff(a, b)\n    {\n      var diff = Math.abs(a - b);\n      if (diff > kTwo_PI)\n      return diff;\n\n      return Math.min(kTwo_PI - diff, diff);\n    }\n\n    function isThisAxis(index, worldUp)\n    {\n      var snapVec = getSnapVector(index);\n      if (snapVec.distanceToSquared(worldUp) < kEpsilon)\n      return true;\n\n      myVec2.set(-worldUp.x, -worldUp.y, -worldUp.z);\n      return snapVec.distanceToSquared(myVec2) < kEpsilon;\n    }\n\n    function filterSnapAngles(snapLengths, worldUp)\n    {\n      // For some rotation axes the snap angles for two axes can be close together.\n      // Snapping to one or the other doesn't give expected results. This filters\n      // the snap angles and removes one of the close angles. When two angles are\n      // withing AliasSnapThreshold, one of the angles is removed. The one we keep\n      // is the one with the longest projection length unless it happens to be the\n      // current up direction.\n\n      // This threshold should be greater than the snap out threshold plus the snap\n      // in threshold so that when two snap points are close together there is room\n      // to snap out of one and into the other.\n      var kAliasSnapThreshold = kSnapInThreshold + kSnapOutThreshold + 2.0 * Math.PI / 180.0;\n\n      for (var i = 0; i < 6; ++i)\n      {\n        if (mySnapAngles[i] === kNOSNAP)\n        continue;\n\n        for (var j = i + 1; j < 6; ++j)\n        {\n          if (mySnapAngles[j] === kNOSNAP)\n          continue;\n\n          var diff = angleDiff(mySnapAngles[i], mySnapAngles[j]);\n\n          if (diff < kAliasSnapThreshold)\n          {\n            if (snapLengths[i] < snapLengths[j] && !isThisAxis(i, worldUp) ||\n            isThisAxis(j, worldUp))\n            {\n              mySnapAngles[i] = kNOSNAP;\n              break; // angle i is removed stop checking\n            } else\n\n            mySnapAngles[j] = kNOSNAP;\n          }\n        }\n      }\n    }\n\n    // Calculate the opposite angle from angle. angle should be\n    // from -PI to PI, or kNOSNAP\n    function oppositeAngle(angle)\n    {\n      if (angle > kTwo_PI)\n      return angle;\n      if (angle <= 0.0)\n      return angle + Math.PI;\n      return angle - Math.PI;\n    }\n\n    function updateSnapPoints(viewVec, cameraUp, worldUp)\n    {\n      var normal = viewVec.clone().normalize();\n      var snaps = new Array(3);\n      var lengths = new Array(6);\n\n      // Project the 6 axis vectors onto the view plane:\n      snaps[0] = projectAxis(1.0, 0.0, 0.0, normal);\n      snaps[1] = projectAxis(0.0, 1.0, 0.0, normal);\n      snaps[2] = projectAxis(0.0, 0.0, 1.0, normal);\n\n      var i;\n      var left = cameraUp.clone().cross(normal).normalize();\n\n      for (i = 0; i < 3; ++i)\n      {\n        var snap = snaps[i];\n        lengths[i] = snap.length();\n\n        // A short projection length means the axis was too close to\n        // the view vector:\n        if (lengths[i] < kAliasLengthThreshold)\n        {\n          mySnapAngles[i] = kNOSNAP;\n        } else\n\n        {\n          snap.multiplyScalar(1.0 / lengths[i]);\n          mySnapAngles[i] = Math.atan2(left.dot(snap), cameraUp.dot(snap));\n        }\n      }\n      mySnapAngles[3] = oppositeAngle(mySnapAngles[0]);\n      mySnapAngles[4] = oppositeAngle(mySnapAngles[1]);\n      mySnapAngles[5] = oppositeAngle(mySnapAngles[2]);\n      lengths[3] = lengths[0];\n      lengths[4] = lengths[1];\n      lengths[5] = lengths[2];\n\n      filterSnapAngles(lengths, worldUp);\n\n      for (i = 0; i < 6; ++i)\n      {\n        if (mySnapAngles[i] !== kNOSNAP)\n        {\n          var z = myVec2.set(0.0, 0.0, 1.0);\n          myRotate.setFromAxisAngle(z, mySnapAngles[i]);\n          // The radius of the circle is 0.5 so place the points\n          // just outside the circle:\n          var pos = myVec2.set(0.0, 0.54, 0.0);\n          pos.applyQuaternion(myRotate);\n          mySnapPoints[i].position.copy(pos);\n          mySnapPoints[i].visible = true;\n        } else\n\n        mySnapPoints[i].visible = false;\n      }\n    }\n\n    function buildReferenceGeometry()\n    {\n      myReferenceGeometry = new THREE.Object3D();\n\n      // The roll hud geometry is built with unit diameter and then scaled\n      // to world space later.\n      var geom = new THREE.RingGeometry(0.5 - 0.01 * myRingScale, 0.5, 60);\n      var circle = new THREE.Mesh(geom, myMaterial);\n\n      myReferenceCircle = circle;\n\n      var thick = 0.007 * myRingScale;\n      var geomX = new THREE.BoxGeometry(0.930, thick, thick);\n      var geomY = new THREE.BoxGeometry(thick, 0.930, thick);\n      var geomZ = new THREE.BoxGeometry(thick, thick, 0.930);\n\n      myReferenceXaxis = new THREE.Mesh(geomX, myMaterial);\n      myReferenceYaxis = new THREE.Mesh(geomY, myMaterial);\n      myReferenceZaxis = new THREE.Mesh(geomZ, myMaterial);\n\n      myReferenceGeometry.add(myReferenceXaxis);\n      myReferenceGeometry.add(myReferenceYaxis);\n      myReferenceGeometry.add(myReferenceZaxis);\n\n      myReferenceUp = new THREE.Mesh(new THREE.CircleGeometry(0.005), myMaterial);\n      myReferenceGeometry.add(myReferenceUp);\n\n      mySnapPoints = new Array(6);\n      mySnapFlags = new Array(6);\n      for (var i = 0; i < 6; ++i)\n      {\n        var r1 = 0.0050 * myRingScale;\n        var r2 = 0.0025 * myRingScale;\n        mySnapPoints[i] = new THREE.Mesh(new THREE.CircleGeometry(r1, 16), myMaterial);\n        mySnapFlags[i] = new THREE.Mesh(new THREE.CircleGeometry(r2, 16), myMaterial);\n        mySnapFlags[i].visible = false;\n        mySnapPoints[i].add(mySnapFlags[i]);\n        circle.add(mySnapPoints[i]);\n      }\n      myReferenceGeometry.add(circle);\n\n      return myReferenceGeometry;\n    }\n\n    function getReferenceGeometry(scale, lookAtPoint, viewVec, worldUp, cameraUp)\n    {\n      if (!myReferenceGeometry)\n      myReferenceGeometry = buildReferenceGeometry();\n\n      _navapi.orient(myReferenceCircle, lookAtPoint, myCamera.position, worldUp);\n\n      updateSnapPoints(viewVec, cameraUp, worldUp);\n\n      myReferenceGeometry.scale.x = scale;\n      myReferenceGeometry.scale.y = scale;\n      myReferenceGeometry.scale.z = scale;\n\n      myReferenceGeometry.position.copy(lookAtPoint);\n\n      return myReferenceGeometry;\n    }\n\n    function getSnapVector(index)\n    {\n      myVec1.set(0.0, 0.0, 0.0);\n      if (index >= 0)\n      {\n        var v = index >= 3 ? -1 : 1;\n        index %= 3;\n        if (index === 0) myVec1.x = v;\n        if (index === 1) myVec1.y = v;\n        if (index === 2) myVec1.z = v;\n      }\n      if (myAnglesFlipped)\n      myVec1.multiplyScalar(-1);\n\n      return myVec1;\n    }\n\n    function closestSnap(dtheta, snapThresh)\n    {\n      var diff = angleDiff(mySnapAngles[0], dtheta);\n      var closest = 0;\n      for (var i = 1; i < 6; ++i)\n      {\n        var d = angleDiff(mySnapAngles[i], dtheta);\n        if (d < diff)\n        {\n          diff = d;\n          closest = i;\n        }\n      }\n      myClosestAngle = diff;\n      return diff < snapThresh ? closest : -1;\n    }\n\n    function setWorldUp(upvec)\n    {\n      _navapi.setWorldUpVector(upvec, true);\n    }\n\n    function applyRoll(angle)\n    {\n      if (angle === 0.0)\n      return;\n\n      var kStableRollThreshold = 30.0 * Math.PI / 180.0;\n      var view = myVec2.copy(myCamera.position).sub(myLookAtPoint).normalize();\n\n      // Create a quaterion rotation about the roll axis by the angle:\n      myRotate.setFromAxisAngle(view, angle);\n\n      // Check the angle between the view vector and the world up.\n      // When we get close the roll about the view vector becomes unstable\n      // so we jump the up vector to the camera's current vertical.\n      // This should be OK because if we're here we know we aren't snapped.\n      var up = _navapi.getWorldUpVector();\n      var viewUpAngle = Math.abs(view.angleTo(up));\n      if (viewUpAngle < kStableRollThreshold || Math.PI - viewUpAngle < kStableRollThreshold)\n      {\n        up.copy(_navapi.getCameraUpVector()); // This is the actual camera up\n      }\n      // Rotate the current up vector by that quaternion:\n      up.applyQuaternion(myRotate);\n\n      setWorldUp(up);\n    }\n\n    function justNowSnapped()\n    {\n      if (!myCurrentlySnapped)\n      {\n        var closest = closestSnap(myRollAngle, kSnapInThreshold);\n        if (closest >= 0)\n        {\n          myClosestAngle = 0.0;\n          myCurrentlySnapped = true;\n          myRollAngle = mySnapAngles[closest];\n          return getSnapVector(closest);\n        }\n      }\n      return false;\n    }\n\n    function justNowUnsnapped()\n    {\n      if (myCurrentlySnapped)\n      {\n        var closest = closestSnap(myRollAngle, kSnapOutThreshold);\n        if (closest < 0)\n        {\n          myCurrentlySnapped = false;\n          return true;\n        }\n        myClosestAngle = 0.0;\n      }\n      return false;\n    }\n\n    function isReallySnapped(angle, threshold, i, worldUp)\n    {\n      var circleSnapped = angle < threshold;\n      if (circleSnapped)\n      {\n        // Check if the up direction really is the same:\n        var snapUp = getSnapVector(i);\n        return snapUp.distanceToSquared(worldUp) < kEpsilon;\n      }\n      return false;\n    }\n\n    function updateIndicators(worldUp, cameraUp)\n    {\n      // Check if the camera is upside down. If so, up is down.\n      var wDotC = worldUp.dot(cameraUp);\n      var flipped = wDotC < 0.0;\n      if (flipped)\n      cameraUp = cameraUp.clone().multiplyScalar(-1);\n\n      // Need to re-orient and position the UP indicator.\n      // The scalar is the middle radius of the ring geometry.\n      _navapi.orient(myReferenceUp, myLookAtPoint, myCamera.position, cameraUp);\n      myReferenceUp.position.copy(cameraUp.multiplyScalar(0.495));\n\n      var isSnapped = false;\n      var threshold = myCurrentlySnapped ? kSnapOutThreshold : kSnapInThreshold;\n      for (var i = 0; i < 6; ++i)\n      {\n        var angle = angleDiff(mySnapAngles[i], myRollAngle);\n        var snapped = isReallySnapped(angle, threshold, i, worldUp);\n        if (snapped)\n        isSnapped = true;\n        var proximityScale = snapped ? 4.0 : (1.0 - 3.0 * angle / Math.PI) * 3.0;\n        if (proximityScale < 1.0)\n        proximityScale = 1.0;\n\n        // Keep the snap point sizes independent of the ring size:\n        proximityScale *= myRingScale;\n\n        // This turns off/on the inner snap indicator circle within\n        // each of the snap points:\n        mySnapFlags[i].visible = snapped;\n        var snap = mySnapPoints[i];\n        snap.scale.x = proximityScale;\n        snap.scale.y = proximityScale;\n        snap.scale.z = proximityScale;\n      }\n      myReferenceXaxis.visible = isSnapped;\n      myReferenceYaxis.visible = isSnapped;\n      myReferenceZaxis.visible = isSnapped;\n\n      return isSnapped;\n    }\n\n    this.updateRollCamera = function (size, distance)\n    {\n      myCamera.position.copy(mySceneCamera.position);\n      myCamera.quaternion.copy(mySceneCamera.quaternion);\n      myCamera.up.copy(mySceneCamera.up);\n      myCamera.aspect = mySceneCamera.aspect;\n\n      if (size && distance)\n      {\n        myCamera.near = distance - size;\n        myCamera.far = distance + size;\n      }\n      myCamera.updateProjectionMatrix();\n    };\n\n    this.isSnapped = function ()\n    {\n      return myCurrentlySnapped;\n    };\n\n    this.resize = function ()\n    {\n      var worldHeight = myDistance * kHudWorldScale;\n      var worldWidth = worldHeight * mySceneCamera.aspect;\n      var worldSize = (mySceneCamera.aspect < 1.0 ? worldWidth : worldHeight) * myRingSize;\n\n      myReferenceGeometry.scale.x = worldSize;\n      myReferenceGeometry.scale.y = worldSize;\n      myReferenceGeometry.scale.z = worldSize;\n    };\n\n    // TODO: Check for rolled camera and re-orient to up before setting up HUD.\n    this.start = function (lookAtPoint, ringSize)\n    {\n      this.updateHUD(lookAtPoint, ringSize);\n      viewerImpl.addOverlay(\"roll\", myReferenceGeometry);\n    };\n\n    this.updateHUD = function (lookAtPoint, ringSize)\n    {\n      myLookAtPoint = lookAtPoint;\n\n      if (ringSize < kRingSizeMin)\n      ringSize = kRingSizeMin;else\n      if (ringSize > kRingSizeMax)\n      ringSize = kRingSizeMax;\n\n      myRingSize = ringSize;\n      myRingScale = kRingSizeMax / ringSize;\n\n      var viewVec = myVec1.copy(lookAtPoint).sub(mySceneCamera.position);\n      myDistance = viewVec.length();\n\n      var worldHeight = myDistance * kHudWorldScale;\n      var worldWidth = worldHeight * mySceneCamera.aspect;\n      var worldSize = (mySceneCamera.aspect < 1.0 ? worldWidth : worldHeight) * ringSize;\n\n      this.updateRollCamera(worldSize, myDistance);\n\n      var worldUp = _navapi.getWorldUpVector();\n      var cameraUp = _navapi.getCameraUpVector();\n      getReferenceGeometry(worldSize, lookAtPoint, viewVec, worldUp, cameraUp);\n      myRollAngle = 0.0;\n      mySnappedRoll = 0.0;\n\n      var wDotC = worldUp.dot(cameraUp);\n      myAnglesFlipped = wDotC < 0.0;\n\n      myCurrentlySnapped = updateIndicators(worldUp, cameraUp);\n    };\n\n    this.handleRoll = function (dx, dy, p2)\n    {\n      this.updateRollCamera();\n\n      updateIndicators(_navapi.getWorldUpVector(), _navapi.getCameraUpVector());\n\n      if (dx !== 0.0 || dy !== 0.0)\n      {\n        // 2D vectors from the center of the screen (0.5, 0.5)\n        var v1x = p2.x - dx - 0.5;\n        var v1y = p2.y - dy - 0.5;\n        var v2x = p2.x - 0.5;\n        var v2y = p2.y - 0.5;\n\n        // Angle between those to vectors is the rotation of the mouse\n        // around the center of the screen:\n        return handleRollByAngle(Math.atan2(v2y, v2x) - Math.atan2(v1y, v1x));\n      }\n      return false;\n    };\n\n    this.handleRollTouch = function (angle)\n    {\n      this.updateRollCamera();\n\n      updateIndicators(_navapi.getWorldUpVector(), _navapi.getCameraUpVector());\n\n      var delta = angle - myRollAngle;\n      return Math.abs(delta) > 0.001 ? handleRollByAngle(delta) : false;\n    };\n\n    function handleRollByAngle(angle)\n    {\n      // Make sure it's in the right range for comparison with the\n      // snap angles:\n      myRollAngle += angle;\n      if (myRollAngle > Math.PI)\n      myRollAngle = myRollAngle - kTwo_PI;else\n      if (myRollAngle <= -Math.PI)\n      myRollAngle = kTwo_PI + myRollAngle;\n\n      var snappedUp = justNowSnapped();\n      if (snappedUp)\n      {\n        mySnappedRoll = myRollAngle;\n        setWorldUp(snappedUp);\n      } else\n      if (justNowUnsnapped())\n      {\n        // Because the snap points are \"sticky\" the roll amount\n        // in this case is the distance from the snap point:\n        var deltaRoll = myRollAngle - mySnappedRoll;\n        applyRoll(deltaRoll);\n        mySnappedRoll = 0.0;\n      } else\n      if (!myCurrentlySnapped)\n      {\n        applyRoll(angle);\n      } else\n\n      return false;\n\n      return true;\n    }\n\n    this.end = function ()\n    {\n      viewerImpl.removeOverlay(\"roll\", myReferenceGeometry);\n    };\n  }\n\n  var kTwo_PI = 2.0 * Math.PI; // 360 degrees.\n  var kScreenEpsilon = 0.001;\n  var kEpsilon = 0.00001;\n\n  var _isDragging = false;\n  var _needNextRefresh = false;\n  var _started = false;\n\n  var _rollInteraction = new RollInteraction(viewerImpl, _camera);\n  var _startXYZ = new THREE.Vector3();\n  var _moveXYZ = new THREE.Vector3();\n  var _motionDelta = new THREE.Vector3();\n  var _touchType = null;\n  var _touchAngle = 0.0;\n  var _touchCenter = { x: 0.5, y: 0.5 };\n  var _touchDistance = 1.0;\n\n  this.getNames = function ()\n  {\n    return _names;\n  };\n\n  this.getName = function ()\n  {\n    return _names[0];\n  };\n\n  this.activate = function (name)\n  {\n    viewerApi.addEventListener(et.CAMERA_CHANGE_EVENT, this.handleCameraChange);\n    _started = false;\n  };\n\n  this.deactivate = function (name)\n  {\n    _rollInteraction.end();\n    viewerApi.removeEventListener(et.CAMERA_CHANGE_EVENT, this.handleCameraChange);\n    this.utilities.restorePivot();\n    _touchType = null;\n\n    _isDragging = false;\n    _started = false;\n  };\n\n  this.getCursor = function ()\n  {\n    return \"auto\";\n  };\n\n  this.getMotionDelta = function (dxyz)\n  {\n    var deltaX = _moveXYZ.x - _startXYZ.x;\n    var deltaY = _moveXYZ.y - _startXYZ.y;\n    var deltaZ = _moveXYZ.z - _startXYZ.z;\n\n    if (Math.abs(deltaX) < kScreenEpsilon) deltaX = 0.0;\n    if (Math.abs(deltaY) < kScreenEpsilon) deltaY = 0.0;\n    if (Math.abs(deltaZ) < kScreenEpsilon) deltaZ = 0.0;\n\n    dxyz.set(deltaX, deltaY, deltaZ);\n  };\n\n  this.stepMotionDelta = function ()\n  {\n    _startXYZ.copy(_moveXYZ);\n  };\n\n  this.update = function ()\n  {\n    if (!_started)\n    {\n      // Stash the current COI and while the interaction is active\n      // use the center of the view as the pivot for rolling.\n      //\n      // Position the temporary COI half way between the near and far\n      // clipping planes to avoid clipping problems:\n      //\n      var viewVec = _navapi.getEyeVector();\n      var distance = (_camera.near + _camera.far) * 0.5;\n      viewVec.normalize().multiplyScalar(distance);\n      var target = viewVec.add(_camera.position);\n\n      this.utilities.savePivot();\n      this.utilities.setPivotPoint(target, true, true);\n      this.utilities.pivotActive(true);\n\n      // var ringSize = (_touchType === \"roll\") ? _touchDistance : kRingSizeDefault;\n      var ringSize = kRingSizeDefault;\n      _rollInteraction.start(target, ringSize);\n      _started = true;\n    }\n\n    var moved = _needNextRefresh;\n\n    this.getMotionDelta(_motionDelta);\n\n    var deltaX = _motionDelta.x;\n    var deltaY = _motionDelta.y;\n    var deltaZ = _motionDelta.z;\n\n    if (_needNextRefresh || _touchType === \"roll\" || _isDragging && (deltaX !== 0.0 || deltaY !== 0.0 || deltaZ !== 0.0))\n    {\n      if (_touchType === \"roll\")\n      _needNextRefresh = _rollInteraction.handleRollTouch(_touchAngle);else\n\n      _needNextRefresh = _rollInteraction.handleRoll(deltaX, deltaY, _moveXYZ);\n    }\n    this.stepMotionDelta();\n\n    if (_camera.dirty)\n    moved = true;\n\n    return moved;\n  };\n\n  this.handleResize = function ()\n  {\n    _rollInteraction.resize();\n    _needNextRefresh = true;\n  };\n\n  function fingerSeparation(event)\n  {\n    var dx = event.pointers[1].clientX - event.pointers[0].clientX;\n    var dy = event.pointers[1].clientY - event.pointers[0].clientY;\n    var dist = Math.sqrt(dx * dx + dy * dy);\n\n    // Normalize:\n    var vp = _navapi.getScreenViewport();\n    return dist / Math.min(vp.width, vp.height);\n  }\n\n  this.handleGesture = function (event)\n  {\n    switch (event.type) {\n\n      // Single touch, fake the mouse for now...\n      case \"dragstart\":\n        _touchType = \"drag\";\n        return this.handleButtonDown(event, 0);\n\n      case \"dragmove\":\n        return this.handleMouseMove(event);\n\n      case \"dragend\":\n        _touchType = null;\n        return this.handleButtonUp(event, 0);\n\n\n      // Rotate gesture detected:\n      case \"rotatestart\":\n        viewerApi.removeEventListener(et.CAMERA_CHANGE_EVENT, this.handleCameraChange);\n        _touchType = \"roll\";\n        _touchAngle = THREE.Math.degToRad(event.rotation);\n        _touchCenter = {\n          x: (event.normalizedX + 1.0) * 0.5,\n          y: 1.0 - (event.normalizedY + 1.0) * 0.5 };\n\n        _touchDistance = fingerSeparation(event);\n        return true;\n\n      case \"rotatemove\":\n        _touchAngle = THREE.Math.degToRad(event.rotation);\n        return _touchType === \"roll\";\n\n      case \"rotateend\":\n        viewerApi.addEventListener(et.CAMERA_CHANGE_EVENT, this.handleCameraChange);\n        _touchAngle = THREE.Math.degToRad(event.rotation);\n        _touchType = null;\n\n        // Sigh... minor hack\n        // Can't consume the end event because the hot gesture\n        // tool needs to see it to end the interaction.\n        return false;}\n\n    return false;\n  };\n\n  this.handleWheelInput = function (delta)\n  {\n    // Disable wheel while roll active:\n    return true;\n  };\n\n  this.handleCameraChange = function ()\n  {\n    var viewVec = _navapi.getEyeVector();\n    var distance = (_camera.near + _camera.far) * 0.5;\n    viewVec.normalize().multiplyScalar(distance);\n    var target = viewVec.add(_camera.position);\n\n    // Setting the pivot causes an infinite loop of camera changed events. Is it necessary to set it?\n    //this.utilities.savePivot();\n    //this.utilities.setPivotPoint( target, true, true );\n    //this.utilities.pivotActive(true);\n\n    _rollInteraction.updateHUD(target, kRingSizeDefault);\n  };\n\n  this.handleButtonDown = function (event, button)\n  {\n    _startXYZ.x = (event.normalizedX + 1.0) * 0.5;\n    _startXYZ.y = 1.0 - (event.normalizedY + 1.0) * 0.5;\n\n    _moveXYZ.copy(_startXYZ);\n\n    _isDragging = true;\n    _touchType = null;\n\n    this.controller.setIsLocked(true);\n\n    viewerApi.removeEventListener(et.CAMERA_CHANGE_EVENT, self.handleCameraChange);\n\n    return true;\n  };\n\n  this.handleButtonUp = function (event, button)\n  {\n    _moveXYZ.x = (event.normalizedX + 1.0) * 0.5;\n    _moveXYZ.y = 1.0 - (event.normalizedY + 1.0) * 0.5;\n\n    _isDragging = false;\n    _needNextRefresh = true; // To accept final motion.\n\n    this.controller.setIsLocked(false);\n\n    viewerApi.addEventListener(et.CAMERA_CHANGE_EVENT, self.handleCameraChange);\n\n    return true;\n  };\n\n  this.handleMouseMove = function (event)\n  {\n    _moveXYZ.x = (event.normalizedX + 1.0) * 0.5;\n    _moveXYZ.y = 1.0 - (event.normalizedY + 1.0) * 0.5;\n    return true;\n  };\n\n  this.handleBlur = function (event)\n  {\n    _isDragging = false;\n    _touchType = null;\n    return false;\n  };\n\n};","import * as THREE from \"three\";\nimport { i18n } from \"../../globalization/i18next\";\nimport { GlobalManagerMixin } from '../../application/GlobalManagerMixin';\nimport { VIEW_TYPES } from \"../../application/PreferenceNames\";\n\n// Number.MIN_VALUE is specified as the smallest number greater than 0 possible (5e-324). In Fusion on Mac,\n// Number.MIN_VALUE is exactly 0 for reasons that escape me. This causes issues with the Autocam code. Interestingly,\n// Fusion on Mac can't represent the number 5e-324. The smallest it can do is 3e-308 (found via trial and error).\n// Sadly, this constant can't be overwritten so monkey patching is out of the question. Instead use our own constant.\n// See DC-11061\nvar MIN_VALUE = Number.MIN_VALUE || 3e-308;\n\n/**\n                                             * Clamps a vector to an axis aligned unit vector if it's sufficiently close. This is to help deal with THREE doing:\n                                             * var t = new THREE.Vector3(0, 0, -0.6873695734180347);\n                                             * t.normalize();\n                                             * t.z; // -0.9999999999999999\n                                             *\n                                             * and us doing direct comparisons of floating point numbers.\n                                             *\n                                             * @param {THREE.Vector3} vec - The vector to check and clamp. This vector may be modified\n                                             */\nfunction clampToUnitAxisIfNeeded(vec) {\n  var tolerance = 1e-12;\n  if (Math.abs(vec.x) < tolerance && Math.abs(vec.y) < tolerance) {\n    vec.set(0, 0, vec.z > 0 ? 1 : -1);\n  } else if (Math.abs(vec.y) < tolerance && Math.abs(vec.z) < tolerance) {\n    vec.set(vec.x > 0 ? 1 : -1, 0, 0);\n  } else if (Math.abs(vec.z) < tolerance && Math.abs(vec.x) < tolerance) {\n    vec.set(0, vec.y > 0 ? 1 : -1, 0);\n  }\n}\n\n/**\n   * Autocam is the container for the view cube and steering wheel classes.\n   * It contains math for camera transformations and most of the functions are retrieved from SampleCAM.\n   * Refer to their documentation for explanation.\n   */\nexport function Autocam(camera, navApi, canvas) {\n\n  var cam = this;\n  var dropDownMenu = null;\n  var _changing = false;\n\n  this.cube = null;\n  this.camera = camera;\n  this.renderer = 'WEBGL';\n  this.startState = {};\n  this.navApi = navApi; // TODO: use this for camera sync.\n  this.orthographicFaces = false;\n  this.canvas = canvas;\n\n  this.cameraChangedCallback = function () {};\n  this.pivotDisplayCallback = function () {};\n  this.transitionCompletedCallback = function () {};\n\n  //delta Time\n  var startTime = Date.now();\n  var deltaTime;\n  var setHomeDeferred = false;\n\n  function changed(worldUpChanged)\n  {\n    _changing = true;\n    camera.target.copy(cam.center);\n    camera.pivot.copy(cam.pivot);\n\n    if (camera.worldup)\n    camera.worldup.copy(cam.sceneUpDirection);else\n\n    camera.up.copy(cam.sceneUpDirection);\n\n    cam.cameraChangedCallback(worldUpChanged);\n    _changing = false;\n  }\n\n  this.recordTime = true;\n  this.dtor = function () {\n    this.cube = null;\n    this.cameraChangedCallback = null;\n    this.pivotDisplayCallback = null;\n    this.transitionCompletedCallback = null;\n    this.canvas = null;\n    this.recordTime = false;\n  };\n\n  this.registerCallbackCameraChanged = function (callback) {\n    this.cameraChangedCallback = callback;\n  };\n  this.registerCallbackPivotDisplay = function (callback) {\n    this.pivotDisplayCallback = callback;\n  };\n  this.registerCallbackTransitionCompleted = function (callback) {\n    this.transitionCompletedCallback = callback;\n  };\n\n  this.showPivot = function (state)\n  {\n    this.pivotDisplayCallback(state);\n  };\n\n  this.setWorldUpVector = function (newUp)\n  {\n    if (_changing)\n    return;\n\n    if (newUp && newUp.lengthSq() > 0 && !newUp.normalize().equals(this.sceneUpDirection))\n    {\n      // Changing up resets the front face:\n      this.sceneUpDirection.copy(newUp);\n      this.sceneFrontDirection.copy(this.getWorldFrontVector());\n      this.cubeFront.copy(this.sceneFrontDirection).cross(this.sceneUpDirection).normalize();\n      if (this.cube)\n      requestAnimationFrame(this.cube.render);\n    }\n  };\n\n  this.getWorldUpVector = function ()\n  {\n    return this.sceneUpDirection.clone();\n  };\n\n  // Assumes sceneUpDirection is set.\n  this.getWorldRightVector = function ()\n  {\n    var vec = this.sceneUpDirection.clone();\n\n    if (Math.abs(vec.z) <= Math.abs(vec.y))\n    {\n      // Cross(Vertical, ZAxis)\n      vec.set(vec.y, -vec.x, 0);\n    } else\n    if (vec.z >= 0)\n    {\n      // Cross(YAxis, Vertical)\n      vec.set(vec.z, 0, -vec.x);\n    } else\n\n    {\n      // Cross(Vertical, YAxis)\n      vec.set(-vec.z, 0, vec.x);\n    }\n    return vec.normalize();\n  };\n\n  // Assumes sceneUpDirection is set.\n  this.getWorldFrontVector = function ()\n  {\n    var up = this.getWorldUpVector();\n    return up.cross(this.getWorldRightVector()).normalize();\n  };\n\n  this.goToView = function (viewVector) {\n    if (this.navApi.isActionEnabled('gotoview')) {\n      var destination = {\n        position: viewVector.position.clone(),\n        up: viewVector.up.clone(),\n        center: viewVector.center.clone(),\n        pivot: viewVector.pivot.clone(),\n        fov: viewVector.fov,\n        worldUp: viewVector.worldUp.clone(),\n        isOrtho: viewVector.isOrtho };\n\n\n      // add global position/center/pivot - which are stable under globalOffset changes\n      this.addGlobalPositions(destination);\n\n      cam.elapsedTime = 0;\n      this.animateTransition(destination);\n    }\n  };\n\n  this.getCurrentView = function () {\n    return {\n      position: camera.position.clone(),\n      up: camera.up.clone(),\n      center: this.center.clone(),\n      pivot: this.pivot.clone(),\n      fov: camera.fov,\n      worldUp: this.sceneUpDirection.clone(),\n      isOrtho: camera.isPerspective === false };\n\n  };\n\n  this.setCurrentViewAsHome = function (focusFirst) {\n    if (focusFirst) {\n      this.navApi.setRequestFitToView(true);\n      setHomeDeferred = true;\n    } else\n    {\n      this.homeVector = this.getCurrentView();\n    }\n  };\n\n  // This method sets both the \"current\" home and the \"original\" home.\n  // The latter is used for the \"reset home\" function.\n  this.setHomeViewFrom = function (camera) {\n    var pivot = camera.pivot ? camera.pivot : this.center;\n    var center = camera.target ? camera.target : this.pivot;\n    var worldup = camera.worldup ? camera.worldup : this.sceneUpDirection;\n\n    this.homeVector = {\n      position: camera.position.clone(),\n      up: camera.up.clone(),\n      center: center.clone(),\n      pivot: pivot.clone(),\n      fov: camera.fov,\n      worldUp: worldup.clone(),\n      isOrtho: camera.isPerspective === false };\n\n\n    this.originalHomeVector = {\n      position: camera.position.clone(),\n      up: camera.up.clone(),\n      center: center.clone(),\n      pivot: pivot.clone(),\n      fov: camera.fov,\n      worldUp: worldup.clone(),\n      worldFront: this.sceneFrontDirection.clone(), // Extra for reset orientation\n      isOrtho: camera.isPerspective === false };\n\n\n    // Remember global positions as well - which keep stable under globalOffset changes.\n    this.addGlobalPositions(this.homeVector);\n    this.addGlobalPositions(this.originalHomeVector);\n  };\n\n  this.toPerspective = function () {\n    if (!camera.isPerspective) {\n      camera.toPerspective();\n      changed(false);\n    }\n  };\n\n  this.toOrthographic = function () {\n    if (camera.isPerspective) {\n      camera.toOrthographic();\n      changed(false);\n    }\n  };\n\n  this.setOrthographicFaces = function (state) {\n    this.orthographicFaces = state;\n  };\n\n  this.getViewType = function () {\n    if (this.orthographicFaces) {\n      return VIEW_TYPES.PERSPECTIVE_ORTHO_FACES;\n    }\n\n    return camera.isPerspective ? VIEW_TYPES.PERSPECTIVE : VIEW_TYPES.ORTHOGRAPHIC;\n  };\n\n  this.setViewType = function (viewType, isFaceView) {\n    switch (viewType) {\n      case VIEW_TYPES.ORTHOGRAPHIC:\n        this.setOrthographicFaces(false);\n        this.toOrthographic();\n        return true;\n      case VIEW_TYPES.PERSPECTIVE:\n        this.setOrthographicFaces(false);\n        this.toPerspective();\n        return true;\n      case VIEW_TYPES.PERSPECTIVE_ORTHO_FACES:\n        this.setOrthographicFaces(true);\n        if (isFaceView === undefined) {\n          isFaceView = this.isFaceView();\n        }\n\n        if (isFaceView) {\n          this.toOrthographic();\n        } else {\n          this.toPerspective();\n        }\n        return true;\n      default:\n        // This viewType is not supported.\n        // We do not want to call the view type changed callback\n        return false;}\n\n  };\n\n  this.goHome = function () {\n    if (this.navApi.isActionEnabled('gotoview')) {\n      this.navApi.setPivotSetFlag(false);\n      this.goToView(this.homeVector);\n    }\n  };\n\n  this.resetHome = function () {\n    this.homeVector.position.copy(this.originalHomeVector.position);\n    this.homeVector.up.copy(this.originalHomeVector.up);\n    this.homeVector.center.copy(this.originalHomeVector.center);\n    this.homeVector.pivot.copy(this.originalHomeVector.pivot);\n    this.homeVector.fov = this.originalHomeVector.fov;\n    this.homeVector.worldUp.copy(this.originalHomeVector.worldUp);\n    this.homeVector.isOrtho = this.originalHomeVector.isOrtho;\n    this.goHome();\n  };\n\n  this.getView = function () {\n    return this.center.clone().sub(camera.position);\n  };\n\n  this.setCameraUp = function (up) {\n    var view = this.dir.clone();\n    var right = view.cross(up).normalize();\n    if (right.lengthSq() === 0)\n    {\n      // Try again after perturbing eye direction:\n      view.copy(this.dir);\n      if (up.z > up.y)\n      view.y += 0.0001;else\n\n      view.z += 0.0001;\n\n      right = view.cross(up).normalize();\n    }\n    // Orthogonal camera up direction:\n    camera.up.copy(right).cross(this.dir).normalize();\n  };\n\n  // Add global positions to view. These are used on globalOffset changes.\n  this.addGlobalPositions = function (view) {\n    // use globalOffset of current camera by default\n    var globalOffset = this.camera.globalOffset;\n\n    view.globalPosition = view.position.clone().add(globalOffset);\n    view.globalCenter = view.center.clone().add(globalOffset);\n    view.globalPivot = view.pivot.clone().add(globalOffset);\n  };\n\n  function updateViewGlobalOffset(view, newOffset) {\n    view.position.copy(view.globalPosition).sub(newOffset);\n    view.center.copy(view.globalCenter).sub(newOffset);\n    view.pivot.copy(view.globalPivot).sub(newOffset);\n  };\n\n  // If the dynamic viewer globalOffset changes, we must update our saved views.\n  this.onGlobalOffsetChanged = function (newOffset) {\n    updateViewGlobalOffset(this.homeVector, newOffset);\n    updateViewGlobalOffset(this.originalHomeVector, newOffset);\n    this.camera.setGlobalOffset(newOffset);\n  };\n\n  /***\n     this.render = function(){\n         //renderer.render( scene, camera );\n         //We need to remove all calls to this render\n         avp.logger.log(\"Unrequired call to render within Autocam.js:17\")\n     };\n     ***/\n\n  var that = this;\n  (function animate() {\n    if (that.recordTime) {\n      requestAnimationFrame(animate);\n    }\n    // Is there an assumption here about the order of animation frame callbacks?\n    var now = Date.now();\n    deltaTime = now - startTime;\n    startTime = now;\n  })();\n\n  //Control variables\n  this.ortho = false;\n  this.center = camera.target ? camera.target.clone() : new THREE.Vector3(0, 0, 0);\n  this.pivot = camera.pivot ? camera.pivot.clone() : this.center.clone();\n\n  this.sceneUpDirection = camera.worldup ? camera.worldup.clone() : camera.up.clone();\n  this.sceneFrontDirection = this.getWorldFrontVector();\n\n  //\n  //dir, up, left vector\n  this.dir = this.getView();\n\n  // Compute \"real\" camera up:\n  this.setCameraUp(camera.up);\n\n  this.saveCenter = this.center.clone();\n  this.savePivot = this.pivot.clone();\n  this.saveEye = camera.position.clone();\n  this.saveUp = camera.up.clone();\n  var prevEye, prevCenter, prevUp, prevPivot;\n\n  this.cubeFront = this.sceneFrontDirection.clone().cross(this.sceneUpDirection).normalize();\n\n  this.setHomeViewFrom(camera);\n\n  var rotInitial = new THREE.Quaternion();\n  var rotFinal = new THREE.Quaternion();\n  var rotTwist = new THREE.Quaternion();\n  var rotSpin = new THREE.Quaternion();\n  var distInitial;\n  var distFinal;\n\n  /**\n                  * Holds the default pan speed multiplier of 0.5\n                  * @type {number}\n                  */\n  this.userPanSpeed = 0.5;\n\n  /**\n                            * Holds the default look speed multiplier of 2.0\n                            * @type {number}\n                            */\n  this.userLookSpeed = 2.0;\n\n  /**\n                             * Holds the default height speed multiplier of 5.0 (used in updown function)\n                             * @type {number}\n                             */\n  this.userHeightSpeed = 5.0;\n\n  /**\n                               * Holds the current walk speed multiplier, which can be altered in the steering wheel drop down menu (between 0.24 and 8)\n                               * @type {number}\n                               */\n  this.walkMultiplier = 1.0;\n\n  /**\n                              * Holds the default zoom speed multiplier of 1.015\n                              * @type {number}\n                              */\n  this.userZoomSpeed = 1.015;\n\n  /**\n                               * Holds the orbit multiplier of 5.0\n                               * @type {number}\n                               */\n  this.orbitMultiplier = 5.0;\n  this.currentlyAnimating = false;\n\n  //look\n  camera.keepSceneUpright = true;\n\n  //orbit\n  this.preserveOrbitUpDirection = true;\n  this.alignOrbitUpDirection = true;\n  this.constrainOrbitHorizontal = false;\n  this.constrainOrbitVertical = false;\n  this.doCustomOrbit = false;\n  this.snapOrbitDeadZone = 0.045;\n  this.snapOrbitThresholdH = this.snapOrbitThresholdV = THREE.Math.degToRad(15.0);\n  this.snapOrbitAccelerationAX = this.snapOrbitAccelerationAY = 1.5;\n  this.snapOrbitAccelerationBX = this.snapOrbitAccelerationBY = 2.0;\n  this.snapOrbitAccelerationPointX = this.snapOrbitAccelerationPointY = 0.5;\n\n  this.combined = false;\n\n  //variables used for snapping\n  this.useSnap = false;\n  this.lockDeltaX = 0.0;\n  this.lockedX = false;\n  this.lastSnapRotateX = 0.0;\n  this.lockDeltaY = 0.0;\n  this.lockedY = false;\n  this.lastSnapRotateY = 0.0;\n  this.lastSnapDir = new THREE.Vector3(0, 0, 0);\n\n  //up-down\n  this.topLimit = false;\n  this.bottomLimit = false;\n  this.minSceneBound = 0;\n  this.maxSceneBound = 0;\n\n  //shot\n  var shotParams = { destinationPercent: 1.0, duration: 1.0, zoomToFitScene: true, useOffAxis: false };\n  this.shotParams = shotParams; // Expose these for modification\n  var camParamsInitial, camParamsFinal;\n\n  //zoom\n  this.zoomDelta = new THREE.Vector2();\n  var unitAmount = 0.0;\n\n  //walk\n  var m_resetBiasX, m_resetBiasY, m_bias;\n\n  this.viewCubeMenuOpen = false;\n  this.menuSize = new THREE.Vector2(0, 0);\n  this.menuOrigin = new THREE.Vector2(0, 0);\n\n  camera.lookAt(this.center);\n\n  // function windowResize(){\n  // refresh camera on size change\n\n  // We handle this elsewhere\n  /*\n      renderer.setSize( window.innerWidth, window.innerHeight );\n      camera.aspect = window.innerWidth / window.innerHeight;\n      camera.topFov = camera.bottomFov = camera.fov/2;\n      camera.leftFov = camera.rightFov = (camera.aspect * camera.fov)/2;\n      camera.updateProjectionMatrix();\n  */\n  // }\n\n  /***\n  windowResize();\n  window.addEventListener('resize', windowResize, false);\n  ***/\n\n  this.setCube = function (viewcube)\n  {\n    this.cube = viewcube; // DOH!!!\n  };\n\n  // Sync our local data from the given external camera:\n  this.sync = function (clientCamera) {\n    if (clientCamera.isPerspective !== camera.isPerspective) {\n      if (clientCamera.isPerspective) {\n        camera.toPerspective();\n      } else\n      {\n        camera.toOrthographic();\n        if (clientCamera.saveFov)\n        camera.saveFov = clientCamera.saveFov;\n      }\n    }\n    camera.fov = clientCamera.fov;\n    camera.position.copy(clientCamera.position);\n\n    if (clientCamera.target) {\n      this.center.copy(clientCamera.target);\n      camera.target.copy(clientCamera.target);\n    }\n    if (clientCamera.pivot) {\n      this.pivot.copy(clientCamera.pivot);\n      camera.pivot.copy(clientCamera.pivot);\n    }\n    this.dir.copy(this.center).sub(camera.position);\n\n    this.setCameraUp(clientCamera.up);\n\n    var worldUp = clientCamera.worldup ? clientCamera.worldup : clientCamera.up;\n    if (worldUp.distanceToSquared(this.sceneUpDirection) > 0.0001) {\n      this.setWorldUpVector(worldUp);\n    }\n\n    if (setHomeDeferred && !this.navApi.getTransitionActive()) {\n      setHomeDeferred = false;\n      this.setCurrentViewAsHome(false);\n    }\n    if (this.cube)\n    requestAnimationFrame(this.cube.render);\n  };\n\n\n  this.refresh = function () {\n    if (this.cube)\n    this.cube.refreshCube();\n  };\n\n  /*        Prototyped Functions          */\n\n  //so we dont need a matrix4 as an intermediate\n  THREE.Matrix3.prototype.makeRotationFromQuaternion = function (q) {\n    var te = this.elements;\n\n    var x = q.x,y = q.y,z = q.z,w = q.w;\n    var x2 = x + x,y2 = y + y,z2 = z + z;\n    var xx = x * x2,xy = x * y2,xz = x * z2;\n    var yy = y * y2,yz = y * z2,zz = z * z2;\n    var wx = w * x2,wy = w * y2,wz = w * z2;\n\n    te[0] = 1 - (yy + zz);\n    te[3] = xy - wz;\n    te[6] = xz + wy;\n\n    te[1] = xy + wz;\n    te[4] = 1 - (xx + zz);\n    te[7] = yz - wx;\n\n    te[2] = xz - wy;\n    te[5] = yz + wx;\n    te[8] = 1 - (xx + yy);\n\n    return this;\n  };\n\n  // changed to accept a matrix3\n  THREE.Quaternion.prototype.setFromRotationMatrix3 = function (m) {\n    // http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToQuaternion/index.htm\n\n    var te = m.elements,\n    m11 = te[0],m12 = te[3],m13 = te[6],\n    m21 = te[1],m22 = te[4],m23 = te[7],\n    m31 = te[2],m32 = te[5],m33 = te[8],\n\n    trace = m11 + m22 + m33,\n    s;\n\n    if (trace > 0) {\n      s = 0.5 / Math.sqrt(trace + 1.0);\n      this.w = 0.25 / s;\n      this.x = (m32 - m23) * s;\n      this.y = (m13 - m31) * s;\n      this.z = (m21 - m12) * s;\n    } else if (m11 > m22 && m11 > m33) {\n      s = 2.0 * Math.sqrt(1.0 + m11 - m22 - m33);\n      this.w = (m32 - m23) / s;\n      this.x = 0.25 * s;\n      this.y = (m12 + m21) / s;\n      this.z = (m13 + m31) / s;\n    } else if (m22 > m33) {\n      s = 2.0 * Math.sqrt(1.0 + m22 - m11 - m33);\n      this.w = (m13 - m31) / s;\n      this.x = (m12 + m21) / s;\n      this.y = 0.25 * s;\n      this.z = (m23 + m32) / s;\n    } else {\n      s = 2.0 * Math.sqrt(1.0 + m33 - m11 - m22);\n      this.w = (m21 - m12) / s;\n      this.x = (m13 + m31) / s;\n      this.y = (m23 + m32) / s;\n      this.z = 0.25 * s;\n    }\n    return this;\n  };\n\n  // NOTE: This modifies the incoming vector!!\n  // TODO: Change all calls to use Vector3.applyQuaternion instead.\n  THREE.Quaternion.prototype.rotate = function (vector) {\n    //From AutoCamMath.h file\n    var kRot = new THREE.Matrix4().makeRotationFromQuaternion(this);\n    var e = kRot.elements;\n\n    //converting 4d matrix to 3d\n    var viewRot = new THREE.Matrix3().set(e[0], e[1], e[2], e[4], e[5], e[6], e[8], e[9], e[10]);\n\n    return vector.applyMatrix3(viewRot);\n  };\n\n\n  function linearClamp(x, a, b) {\n    if (x <= a) {return 0.0;}\n    if (x >= b) {return 1.0;}\n\n    return (x - a) / (b - a);\n  }\n\n  function easeClamp(x, a, b) {\n    if (x <= a) {return 0.0;}\n    if (x >= b) {return 1.0;}\n\n    var t = (x - a) / (b - a);\n    return 0.5 * (Math.sin((t - 0.5) * Math.PI) + 1.0);\n  }\n\n  function linearInterp(t, a, b) {\n    return a * (1.0 - t) + b * t;\n  }\n\n  function equalityClamp(x, a, b) {\n    if (x <= a) {return a;}\n    if (x >= b) {return b;}\n\n    return x;\n  }\n\n  function round2(x) {\n    return Math.round(x * 100) / 100;\n  }\n\n  function round1(x) {\n    return Math.round(x * 10) / 10;\n  }\n\n\n  /*      SHOT OPERATION      */\n\n  //transitions smoothly to destination\n  this.animateTransition = function (destination) {\n\n    // GlobalOffset may change during a transition. So, we make sure here that\n    // the viewerCoords are computed based on latest globalOffset.\n    updateViewGlobalOffset(destination, camera.globalOffset);\n\n    if (!destination) {return;}\n\n    var worldUpChanged = false;\n    var unitTime = 0.0;\n\n    this.setCameraOrtho(destination.isOrtho);\n\n    if (cam.elapsedTime >= shotParams.duration) {\n      unitTime = 1.0;\n\n      cam.center.copy(destination.center);\n      cam.pivot.copy(destination.pivot);\n      camera.position.copy(destination.position);\n      camera.up.copy(destination.up);\n      camera.target.copy(destination.center);\n      if (!destination.isOrtho)\n      camera.fov = destination.fov;\n      camera.dirty = true;\n\n      worldUpChanged = !destination.worldUp.equals(this.sceneUpDirection);\n      if (worldUpChanged)\n      this.setWorldUpVector(destination.worldUp);\n\n      this.currentlyAnimating = false;\n      changed(worldUpChanged);\n      this.showPivot(false);\n      if (this.cube)\n      requestAnimationFrame(this.cube.render);\n\n      //this.addHistoryElement();\n      this.navApi.setTransitionActive(false);\n      this.transitionCompletedCallback();\n      return;\n    }\n    this.currentlyAnimating = true;\n    this.showPivot(true);\n    this.navApi.setTransitionActive(true);\n\n    var tMax = shotParams.destinationPercent;\n    unitTime = easeClamp(cam.elapsedTime / shotParams.duration, 0.0, tMax);\n    var oneMinusTime = 1.0 - unitTime;\n    cam.elapsedTime += deltaTime / 500;\n\n    var center = cam.center.clone().multiplyScalar(oneMinusTime).add(destination.center.clone().multiplyScalar(unitTime));\n    var position = camera.position.clone().multiplyScalar(oneMinusTime).add(destination.position.clone().multiplyScalar(unitTime));\n    var up = camera.up.clone().multiplyScalar(oneMinusTime).add(destination.up.clone().multiplyScalar(unitTime));\n    var pivot = camera.pivot.clone().multiplyScalar(oneMinusTime).add(destination.pivot.clone().multiplyScalar(unitTime));\n    var worldUp = this.sceneUpDirection.clone().multiplyScalar(oneMinusTime).add(destination.worldUp.clone().multiplyScalar(unitTime));\n    var fov = camera.fov * oneMinusTime + destination.fov * unitTime;\n\n    cam.center.copy(center);\n    cam.pivot.copy(pivot);\n    camera.position.copy(position);\n    camera.up.copy(up);\n    camera.target.copy(center);\n    if (!destination.isOrtho)\n    camera.fov = fov;\n    camera.dirty = true;\n\n    worldUpChanged = worldUp.distanceToSquared(this.sceneUpDirection) > 0.0001;\n    if (worldUpChanged)\n    this.setWorldUpVector(worldUp);\n\n    camera.lookAt(cam.center);\n    changed(worldUpChanged);\n\n    if (this.cube)\n    requestAnimationFrame(this.cube.render);\n\n    requestAnimationFrame(function () {cam.animateTransition(destination);});\n  };\n\n  //used for view cube transforms, to see difference between this and linear interpolation watch\n  //http://www.youtube.com/watch?v=uNHIPVOnt-Y\n  this.sphericallyInterpolateTransition = function (completionCallback)\n  {\n    var center, position, up;\n    var unitTime = 0.0;\n    this.currentlyAnimating = true;\n    this.navApi.setTransitionActive(true);\n\n    if (cam.elapsedTime >= shotParams.duration) {\n      unitTime = 1.0;\n      this.currentlyAnimating = false;\n    } else\n    {\n      var tMax = shotParams.destinationPercent;\n      unitTime = easeClamp(cam.elapsedTime / shotParams.duration, 0.0, tMax);\n      cam.elapsedTime += deltaTime / 500;\n    }\n\n    // This seems to avoid some error in the rotation:\n    if (unitTime === 1.0) {\n      position = camParamsFinal.position;\n      center = camParamsFinal.center;\n      up = camParamsFinal.up;\n    } else\n    {\n      var M = new THREE.Matrix3();\n      var rot = rotInitial.clone();\n      rot.slerp(rotFinal, unitTime);\n      M.makeRotationFromQuaternion(rot);\n      var dist = linearInterp(unitTime, distInitial, distFinal);\n\n      var e = M.elements;\n\n      center = camParamsInitial.center.clone().multiplyScalar(1.0 - unitTime).add(camParamsFinal.center.clone().multiplyScalar(unitTime));\n      position = center.clone().sub(new THREE.Vector3(e[0], e[1], e[2]).multiplyScalar(dist));\n      up = new THREE.Vector3(e[3], e[4], e[5]);\n    }\n    cam.center.copy(center);\n    camera.position.copy(position);\n    camera.up.copy(up);\n\n    // The above code will have to change if we want the proper rotation\n    // to occur about the pivot point instead of the center.\n    if (!cam.navApi.getUsePivotAlways())\n    cam.pivot.copy(center);\n\n    camera.lookAt(cam.center);\n\n    if (this.currentlyAnimating === true) {\n      this.showPivot(true);\n      requestAnimationFrame(function () {cam.sphericallyInterpolateTransition(completionCallback);});\n    } else\n    {\n      this.navApi.setTransitionActive(false);\n      this.showPivot(false);\n      //this.addHistoryElement();\n\n      if (this.orthographicFaces && this.isFaceView())\n      this.setCameraOrtho(true);\n\n      if (completionCallback)\n      completionCallback();\n    }\n    changed(false);\n    if (this.cube)\n    requestAnimationFrame(this.cube.render);\n  };\n\n  //This is used to determine the relation between camera up vector and scene direction, used to determine which\n  //face to translate to when clicking on a viewcube arrow\n  this.getOrientation = function () {\n    if (!this.cube)\n    return;\n\n    var camX = round1(camera.up.x);\n    var camY = round1(camera.up.y);\n    var camZ = round1(camera.up.z);\n    var sceneFront = this.sceneFrontDirection.clone();\n    var sceneUp = this.sceneUpDirection.clone();\n    var sceneRight = this.sceneFrontDirection.clone().cross(this.sceneUpDirection).normalize();\n    sceneFront.x = round1(sceneFront.x);\n    sceneFront.y = round1(sceneFront.y);\n    sceneFront.z = round1(sceneFront.z);\n    sceneUp.x = round1(sceneUp.x);\n    sceneUp.y = round1(sceneUp.y);\n    sceneUp.z = round1(sceneUp.z);\n    sceneRight.x = round1(sceneRight.x);\n    sceneRight.y = round1(sceneRight.y);\n    sceneRight.z = round1(sceneRight.z);\n    var sceneLeft = sceneRight.clone().multiplyScalar(-1);\n    var sceneDown = sceneUp.clone().multiplyScalar(-1);\n    var sceneBack = sceneFront.clone().multiplyScalar(-1);\n\n    switch (this.cube.currentFace) {\n      case \"front\":\n        if (sceneUp.x == camX && sceneUp.y == camY && sceneUp.z == camZ)\n        return \"up\";else\n        if (sceneDown.x == camX && sceneDown.y == camY && sceneDown.z == camZ)\n        return \"down\";else\n        if (sceneRight.x == camX && sceneRight.y == camY && sceneRight.z == camZ)\n        return \"right\";else\n        if (sceneLeft.x == camX && sceneLeft.y == camY && sceneLeft.z == camZ)\n        return \"left\";\n        break;\n      case \"right\":\n        if (sceneUp.x == camX && sceneUp.y == camY && sceneUp.z == camZ)\n        return \"up\";else\n        if (sceneDown.x == camX && sceneDown.y == camY && sceneDown.z == camZ)\n        return \"down\";else\n        if (sceneBack.x == camX && sceneBack.y == camY && sceneBack.z == camZ)\n        return \"left\";else\n        if (sceneFront.x == camX && sceneFront.y == camY && sceneFront.z == camZ)\n        return \"right\";\n        break;\n      case \"left\":\n        if (sceneUp.x == camX && sceneUp.y == camY && sceneUp.z == camZ)\n        return \"up\";else\n        if (sceneDown.x == camX && sceneDown.y == camY && sceneDown.z == camZ)\n        return \"down\";else\n        if (sceneFront.x == camX && sceneFront.y == camY && sceneFront.z == camZ)\n        return \"left\";else\n        if (sceneBack.x == camX && sceneBack.y == camY && sceneBack.z == camZ)\n        return \"right\";\n        break;\n      case \"back\":\n        if (sceneUp.x == camX && sceneUp.y == camY && sceneUp.z == camZ)\n        return \"up\";else\n        if (sceneDown.x == camX && sceneDown.y == camY && sceneDown.z == camZ)\n        return \"down\";else\n        if (sceneLeft.x == camX && sceneLeft.y == camY && sceneLeft.z == camZ)\n        return \"right\";else\n        if (sceneRight.x == camX && sceneRight.y == camY && sceneRight.z == camZ)\n        return \"left\";\n        break;\n      case \"top\":\n        if (sceneBack.x == camX && sceneBack.y == camY && sceneBack.z == camZ)\n        return \"down\";else\n        if (sceneFront.x == camX && sceneFront.y == camY && sceneFront.z == camZ)\n        return \"up\";else\n        if (sceneRight.x == camX && sceneRight.y == camY && sceneRight.z == camZ)\n        return \"right\";else\n        if (sceneLeft.x == camX && sceneLeft.y == camY && sceneLeft.z == camZ)\n        return \"left\";\n        break;\n      case \"bottom\":\n        if (sceneFront.x == camX && sceneFront.y == camY && sceneFront.z == camZ)\n        return \"down\";else\n        if (sceneBack.x == camX && sceneBack.y == camY && sceneBack.z == camZ)\n        return \"up\";else\n        if (sceneRight.x == camX && sceneRight.y == camY && sceneRight.z == camZ)\n        return \"right\";else\n        if (sceneLeft.x == camX && sceneLeft.y == camY && sceneLeft.z == camZ)\n        return \"left\";\n        break;}\n\n  };\n\n  this.setCameraOrtho = function (yes) {\n    if (yes && camera.isPerspective)\n    camera.toOrthographic();\n\n    if (!yes && !camera.isPerspective)\n    camera.toPerspective();\n  };\n\n  this.resetOrientation = function () {\n    if (this.cube) {\n      this.cube.showCompass(this.cube.prevRenderCompass);\n    }\n\n    this.setCameraOrtho(this.originalHomeVector.isOrtho);\n    this.sceneUpDirection.copy(this.originalHomeVector.worldUp);\n    this.sceneFrontDirection.copy(this.originalHomeVector.worldFront);\n    this.cubeFront.copy(this.sceneFrontDirection).cross(this.sceneUpDirection).normalize();\n    this.setCameraUp(this.sceneUpDirection);\n    changed(true);\n  };\n\n  this.setCurrentViewAsFront = function () {\n    if (this.cube) {\n      this.cube.currentFace = \"front\";\n      this.cube.showCompass(false); // hide the compass if the user changes the view\n    }\n\n    this.sceneUpDirection.copy(camera.up.clone());\n    clampToUnitAxisIfNeeded(this.sceneUpDirection);\n\n    this.sceneFrontDirection.copy(this.getView()).normalize();\n    clampToUnitAxisIfNeeded(this.sceneFrontDirection);\n\n    this.cubeFront.copy(this.sceneFrontDirection).cross(this.sceneUpDirection).normalize();\n    clampToUnitAxisIfNeeded(this.cubeFront);\n\n    if (this.orthographicFaces)\n    this.setCameraOrtho(true);\n\n    changed(true);\n  };\n\n  this.setCurrentViewAsTop = function () {\n    if (this.cube) {\n      this.cube.currentFace = \"top\";\n      this.cube.showCompass(false); // hide the compass if the user changes the view\n    }\n\n    this.sceneUpDirection.copy(this.getView()).multiplyScalar(-1).normalize();\n    clampToUnitAxisIfNeeded(this.sceneUpDirection);\n\n    this.sceneFrontDirection.copy(camera.up);\n    clampToUnitAxisIfNeeded(this.sceneFrontDirection);\n\n    this.cubeFront.copy(this.sceneFrontDirection).cross(this.sceneUpDirection).normalize();\n    clampToUnitAxisIfNeeded(this.cubeFront);\n\n    changed(true);\n  };\n\n  this.calculateCubeTransform = function (faceString) {\n    var worldUp = this.sceneUpDirection.clone();\n    var worldFront = this.sceneFrontDirection.clone();\n    var worldRight = this.sceneFrontDirection.clone().cross(this.sceneUpDirection).normalize();\n\n    camParamsInitial = camera.clone();\n    camParamsInitial.center = cam.center.clone();\n    camParamsInitial.pivot = cam.pivot.clone();\n\n    camParamsFinal = camera.clone();\n    camParamsFinal.center = cam.center.clone();\n    camParamsFinal.pivot = cam.pivot.clone();\n\n    // find movement offset based on given boolean flags\n    var offset = new THREE.Vector3(0, 0, 0);\n    if (faceString.indexOf('back') >= 0) {\n      offset = offset.add(worldFront);\n    }\n    if (faceString.indexOf('front') >= 0) {\n      offset = offset.sub(worldFront);\n    }\n    if (faceString.indexOf('top') >= 0) {\n      offset = offset.add(worldUp);\n    }\n    if (faceString.indexOf('bottom') >= 0) {\n      offset = offset.sub(worldUp);\n    }\n    if (faceString.indexOf('right') >= 0) {\n      offset = offset.add(worldRight);\n    }\n    if (faceString.indexOf('left') >= 0) {\n      offset = offset.sub(worldRight);\n    }\n    var upDir = worldUp;\n\n    // view looking at top or bottom chosen\n    var test = offset.clone().normalize();\n\n    if (1.0 - Math.abs(test.dot(worldUp)) < MIN_VALUE) {\n      //( offset == worldUp || offset == -worldUp )\n      // find the principal view direction other than top/bottom closest to\n      // the current view direction and use it as an up vector\n\n      var viewDir = this.getView().normalize();\n      var optUpDir = [worldFront.clone(), worldFront.clone().negate(), worldRight.clone(), worldRight.clone().negate()];\n\n      // use both view and up vectors for test vector because transitioning from\n      // top and bottom views, view direction is the same (but up direction is different)\n\n      var sign = test.dot(worldUp) > 0.0 ? +1.0 : -1.0; //( offset == worldUp ) ? +1.0 : -1.0;\n      var testDir = viewDir.clone().add(camera.up.clone().multiplyScalar(sign)).normalize();\n\n      var optValue = -2.0;\n\n      for (var i = 0; i < 4; i++) {\n        var value = testDir.dot(optUpDir[i]);\n\n        if (value > optValue) {\n          optValue = value;\n          upDir = optUpDir[i].multiplyScalar(sign);\n        }\n      }\n    }\n\n    distFinal = distInitial = this.getView().length();\n    // WHY? camParamsFinal.center = this.originalCenter;\n    camParamsFinal.position.copy(camParamsFinal.center.clone().add(offset.multiplyScalar(distFinal / offset.length())));\n    camParamsFinal.up.copy(upDir);\n\n    var D = camParamsInitial.center.clone().sub(camParamsInitial.position).normalize();\n    var R = D.clone().cross(camParamsInitial.up).normalize();\n    var U = R.clone().cross(D).normalize();\n    var M = new THREE.Matrix3();\n    M.set(D.x, U.x, R.x, D.y, U.y, R.y, D.z, U.z, R.z);\n    rotInitial.setFromRotationMatrix3(M);\n\n    D = camParamsFinal.center.clone().sub(camParamsFinal.position).normalize();\n    R = D.clone().cross(camParamsFinal.up).normalize();\n    U = R.clone().cross(D).normalize();\n    M.set(D.x, U.x, R.x, D.y, U.y, R.y, D.z, U.z, R.z);\n    //TODO: figure out when these angles aren't supposed to be 0, works for now\n    rotTwist.setFromAxisAngle(D, 0.0);\n    rotSpin.setFromAxisAngle(U, 0.0);\n    rotFinal.setFromRotationMatrix3(M);\n    rotFinal.multiply(rotTwist).multiply(rotSpin).normalize();\n\n  };\n\n\n  /*         Functions for operation         */\n\n  //convert screen coords to window coords\n  function convertCoordsToWindow(pixelX, pixelY) {\n    var delta = new THREE.Vector2(0, 0);\n\n    var _window = cam.getWindow();\n    delta.x = pixelX / _window.innerWidth;\n    delta.y = pixelY / _window.innerHeight;\n\n    return delta;\n  }\n\n\n  function getNextRotation(rotationType, snapAngle, lastDelta) {\n    var threshold, accelerationA, accelerationB, shiftZone;\n    threshold = accelerationA = accelerationB = shiftZone = 0.0;\n\n    var next = 0.0;\n    var lockedAxis = null;\n    var lockDelta = null;\n\n    var deadZone = cam.snapOrbitDeadZone;\n    var orbitMultiplier = cam.orbitMultiplier;\n\n    if (rotationType == 'h') {\n      threshold = cam.snapOrbitThresholdH;\n      accelerationA = cam.snapOrbitAccelerationAX;\n      accelerationB = cam.snapOrbitAccelerationBX;\n      shiftZone = 1.0 - cam.snapOrbitAccelerationPointX;\n      lockDelta = cam.lockDeltaX;\n      lockedAxis = cam.lockedX;\n    } else {\n      threshold = cam.snapOrbitThresholdV;\n      accelerationA = cam.snapOrbitAccelerationAY;\n      accelerationB = cam.snapOrbitAccelerationBY;\n      shiftZone = 1.0 - cam.snapOrbitAccelerationPointY;\n      lockDelta = cam.lockDeltaY;\n      lockedAxis = cam.lockedY;\n    }\n\n    if (!lockedAxis) {\n      if (Math.abs(snapAngle) > threshold) {\n        next = lastDelta * orbitMultiplier;\n      } else if (Math.abs(snapAngle) > shiftZone * threshold) {\n        if (lastDelta * snapAngle > 0.0) {\n          next = lastDelta * orbitMultiplier * accelerationA;\n        } else {\n          next = lastDelta * orbitMultiplier * 1.0 / accelerationA;\n        }\n\n      } else {\n        if (lastDelta * snapAngle > 0.0) {\n          next = lastDelta * orbitMultiplier * accelerationB;\n        } else {\n          next = lastDelta * orbitMultiplier * 1.0 / accelerationB;\n        }\n\n      }\n\n      if (next * snapAngle > 0.0 && Math.abs(next) > Math.abs(snapAngle)) {\n        this.lockDeltaX = this.lockDeltaY = 0.0; //want to reset both regardless of rotation axis\n        lockedAxis = true;\n        next = snapAngle;\n      }\n\n    } else {\n      lockDelta += lastDelta;\n\n      if (lockDelta < -deadZone) {\n        next = (lockDelta + deadZone) * orbitMultiplier * 1.0 / accelerationB;\n        lockedAxis = false;\n      } else if (lockDelta > deadZone) {\n        next = (lockDelta - deadZone) * orbitMultiplier * 1.0 / accelerationB;\n        lockedAxis = false;\n      }\n    }\n    return next;\n  }\n\n\n\n  /// Returns true if the operation belongs to a chain of combined operations; otherwise returns false.\n  function IsCombined() {\n    return cam.combined;\n  }\n\n  function isInDeadZone(currentCursor, startCursor) {\n\n    var deadZone = 30;\n    var res = false;\n\n    var _window = cam.getWindow();\n    var w = _window.innerWidth;\n    var x = currentCursor.x % w;\n\n    var h = _window.innerHeight;\n    var y = currentCursor.y % h;\n\n\n    var diffX = x > 0 ? x - startCursor.x : w + x - startCursor.x;\n    var diffY = y > 0 ? y - startCursor.y : h + y - startCursor.y;\n\n    if (Math.abs(diffX) < deadZone && Math.abs(diffY) < deadZone)\n    res = true;\n\n    return res;\n  }\n\n  function GetXYAndWrapCounts(currentCursor, startCursor, wrapCount) {\n    var _window = cam.getWindow();\n    wrapCount.x = (currentCursor.x - startCursor.x) / _window.innerWidth;\n    currentCursor.x = startCursor.x + (currentCursor.x - startCursor.x) % _window.innerWidth;\n\n    wrapCount.y = (currentCursor.y - startCursor.y) / _window.innerHeight;\n    currentCursor.y = startCursor.y + (currentCursor.y - startCursor.y) % _window.innerHeight;\n  }\n\n  function setBias(set, currentCursor, startCursor) {\n    var _window = cam.getWindow();\n    if (m_bias && set) {\n      return;\n\n    } else if (set) {\n      var deadZone = 30;\n      var wrapCount = new THREE.Vector2();\n\n      var x = currentCursor.x;\n      var y = currentCursor.y;\n\n      GetXYAndWrapCounts(currentCursor, startCursor, wrapCount);\n\n      m_resetBiasX = _window.innerWidth * wrapCount.x;\n      m_resetBiasY = _window.innerHeight * wrapCount.y;\n\n      if (x < startCursor.x)\n      x = x - 2 * deadZone;else\n\n      x = x + 2 * deadZone;\n\n      if (y < startCursor.y)\n      y = y - 2 * deadZone;else\n\n      y = y + 2 * deadZone;\n    }\n    m_bias = set;\n  }\n\n  function checkBoundaryConditions(amount, cursorOffset, m_amount) {\n    if (cursorOffset === 0)\n    return 0;\n\n    var deltaAmount = amount;\n    var eye = cam.saveEye.clone().sub(worldUp.clone().multiplyScalar(m_amount + deltaAmount));\n    var prevEye = cam.saveEye.clone().sub(worldUp.clone().multiplyScalar(m_amount));\n\n    var eyeHeight = 0.0;\n    var epsilon = (cam.maxSceneBound - cam.minSceneBound) / 1000;\n\n    //avp.logger.log(m_amount);\n    //avp.logger.log(deltaAmount);\n\n\n    if (cam.topLimit && cursorOffset > 0) {\n      // Cursor was on the top of the slider, but now is moving down.\n      // Bring eyeHeight below maxSceneBound.\n      eyeHeight = cam.maxSceneBound - epsilon;\n      cam.topLimit = false;\n    } else if (cam.bottomLimit && cursorOffset < 0) {\n      // Cursor was on the bottom of the slider, but now is moving up.\n      // Bring eyeHeight above minSceneBound.\n      eyeHeight = cam.minSceneBound + epsilon;\n      cam.bottomLimit = false;\n    } else {\n      eyeHeight = eye.dot(worldUp);\n    }\n\n    var prevEyeHeight = prevEye.dot(worldUp);\n\n    //avp.logger.log(eyeHeight);\n\n    if (eyeHeight < cam.minSceneBound) {\n      if (prevEyeHeight < cam.minSceneBound) {\n        // this limits how far under the min we can go\n        cam.bottomLimit = true;\n        deltaAmount = 0.0;\n      }\n    } else if (eyeHeight > cam.maxSceneBound) {\n      if (prevEyeHeight > cam.maxSceneBound) {\n        // This limits how far over the max we can go\n        cam.topLimit = true;\n        deltaAmount = 0.0;\n      }\n    }\n\n    return deltaAmount;\n  }\n\n  function getMoveAmountFromCursorOffset(offset) {\n    // Manipulating with power of 2 of cursor offset allows to amplify the visible change in the offset\n    // when the offset is big to achieve the effect ofhigher sensitivity of the tool on small offsets\n    // and lower sensitivity on big offsets.\n    var derivedOffset = Math.pow(offset, 2.0);\n    if (offset < 0) {\n      derivedOffset = -derivedOffset;\n    }\n\n    //delta.y = derivedOffset;\n    var delta = convertCoordsToWindow(0, derivedOffset);\n    var sceneHeight = cam.maxSceneBound - cam.minSceneBound;\n\n    // This empirical step provides a good motion of the scene when moving up/down.\n    var p = sceneHeight * 0.01;\n    delta.y *= p;\n\n    var deltaAmount = cam.userHeightSpeed * delta.y;\n    deltaAmount = checkBoundaryConditions(deltaAmount, offset, cam.m_amount);\n\n    return deltaAmount;\n  }\n\n  /**\n     * Draws a menu by appending an unordered list to the given container element.\n     * @param {Array} menuOptions - string array of menu options, null meaning seperator\n     * @param {Array} menuEnables - boolean array of menu enable flags indicating which corresponding menu entry in menuOptions should be enabled or disabled.\n     * @param {Number} mousex - the x coordinate of the menu trigger point, used to position menu\n     * @param {Number} mousey - the y coordinate of the menu trigger point, used to position menu\n     * @param {HTMLElement} container - the container element to add the menu to.\n     * @param {Object} position - object with x, y, w, h of the container element.\n     */\n  this.drawDropdownMenu = function (menuOptions, menuEnables, menuCallbacks, mousex, mousey, container, position) {\n    var itemID = 0;\n\n    var _document = this.getDocument();\n    if (!dropDownMenu) {\n\n      dropDownMenu = _document.createElement('div');\n      dropDownMenu.className = 'dropDownMenu';\n\n      // Initialize the top and left with some approximate values\n      // so that the correct width can be returned by gerBoudningClientRect().\n      dropDownMenu.style.top = '100px';\n      dropDownMenu.style.left = '-400px';\n\n      var menuHeight = 0;\n      var menuMinWidth = 0;\n      for (var i = 0; i < menuOptions.length; i++) {\n        var listItem;\n        if (menuOptions[i] === null) {// menu separator\n          listItem = _document.createElement(\"li\");\n          listItem.style.height = '1px';\n          menuHeight += 1;\n          listItem.style.backgroundColor = \"#E0E0E0\";\n        } else {\n          var content = i18n.translate(menuOptions[i]);\n          menuMinWidth = content.length > menuMinWidth ? content.length : menuMinWidth;\n\n          if (menuCallbacks[i]) {\n            listItem = _document.createElement(\"div\");\n            var check = _document.createElement(\"input\");\n            var text = _document.createElement(\"label\");\n            check.type = \"radio\";\n            check.className = \"dropDownMenuCheck\";\n            text.innerHTML = content;\n            text.className = \"dropDownMenuCheckText\";\n            listItem.appendChild(check);\n            listItem.appendChild(text);\n            listItem.className = \"dropDownMenuCheckbox\";\n          } else\n          {\n            listItem = _document.createElement(\"li\");\n            listItem.textContent = content;\n            listItem.className = menuEnables[i] ? \"dropDownMenuItem\" : \"dropDownMenuItemDisabled\";\n          }\n\n          listItem.id = \"menuItem\" + itemID;\n          itemID++;\n          menuHeight += 25; // HACK!!!\n\n          listItem.setAttribute(\"data-i18n\", menuOptions[i]);\n        }\n        dropDownMenu.appendChild(listItem);\n      }\n\n      // Add the menu to the DOM before asking for boundingClientRect.\n      // Otherwise, it will be zero.\n      container.appendChild(dropDownMenu);\n\n      dropDownMenu.style.minWidth = Math.max(256, menuMinWidth * 7.4) + 'px'; // approximate min width\n      var menuWidth = dropDownMenu.getBoundingClientRect().width;\n\n      this.menuSize.x = menuWidth;\n      this.menuSize.y = menuHeight;\n    } else\n    {\n      // Just add the drop down menu, It already exists.\n      container.appendChild(dropDownMenu);\n    }\n    itemID = 0;\n    for (var i = 0; i < menuOptions.length; i++) {\n      if (menuOptions[i] === null)\n      continue;\n\n      if (menuCallbacks[i]) {\n        var id = \"menuItem\" + itemID;\n        var element = _document.getElementById(id);\n        if (element) {\n          element.children[0].checked = menuCallbacks[i]();\n        }\n      }\n      itemID++;\n    }\n    var top = mousey - 15; // 15 offset so list appears @ button\n    var left = mousex + 1;\n\n    var rect = this.canvas.getBoundingClientRect();\n\n    if (left + this.menuSize.x > rect.right)\n    left = mousex - this.menuSize.x - 1;\n    if (top + this.menuSize.y > rect.bottom)\n    top = rect.bottom - this.menuSize.y;\n\n    // Make relative to container:\n    top -= position.y;\n    left -= position.x;\n\n    dropDownMenu.style.top = top + 'px';\n    dropDownMenu.style.left = left + 'px';\n\n    this.menuOrigin.x = left;\n    this.menuOrigin.y = top;\n  };\n\n\n  this.removeDropdownMenu = function (container) {\n    container.removeChild(dropDownMenu);\n  };\n\n  function isAxisAligned(vec) {\n    var sceneRight = cam.sceneFrontDirection.clone().cross(cam.sceneUpDirection);\n    var checkUp = Math.abs(Math.abs(vec.dot(cam.sceneUpDirection)) - 1.0);\n    var checkFront = Math.abs(Math.abs(vec.dot(cam.sceneFrontDirection)) - 1.0);\n    var checkRight = Math.abs(Math.abs(vec.dot(sceneRight)) - 1.0);\n\n    return checkUp < 0.00001 || checkFront < 0.00001 || checkRight < 0.00001;\n  }\n\n  this.isFaceView = function () {\n    var dir = this.center.clone().sub(camera.position).normalize();\n    return isAxisAligned(dir) && isAxisAligned(camera.up);\n  };\n\n  this.startInteraction = function (x, y) {\n    this.startCursor = new THREE.Vector2(x, y);\n\n    this.startState = {\n      saveCenter: this.center.clone(),\n      saveEye: this.camera.position.clone(),\n      savePivot: this.pivot.clone(),\n      saveUp: this.camera.up.clone() };\n\n\n    this.lockDeltaX = 0.0;\n    this.lockedX = false;\n    this.lastSnapRotateX = 0.0;\n    this.lockDeltaY = 0.0;\n    this.lockedY = false;\n    this.lastSnapRotateY = 0.0;\n    this.lastSnapDir = new THREE.Vector3(0, 0, 0);\n\n    this.navApi.setTransitionActive(true);\n  };\n\n  this.orbit = function (currentCursor, startCursor, distance, startState) {\n    if (!this.navApi.isActionEnabled('orbit') || this.currentlyAnimating === true)\n    return;\n\n    var mode = 'wheel';\n\n    // If orthofaces is enabled, and camera is ortho\n    // then switch to perspective\n    if (cam.orthographicFaces && !camera.isPerspective) {\n      camera.toPerspective();\n\n      // Hack: update the start state with the new position:\n      if (startState)\n      startState.saveEye.copy(this.camera.position);\n    }\n    if (startState) {\n      mode = 'cube';\n    }\n    if (mode == 'cube') {\n      this.saveCenter.copy(startState.saveCenter);\n      this.saveEye.copy(startState.saveEye);\n      this.savePivot.copy(startState.savePivot);\n      this.saveUp.copy(startState.saveUp);\n      this.useSnap = true;\n      this.doCustomOrbit = true;\n    } else {\n      this.saveCenter.copy(this.center);\n      this.savePivot.copy(this.pivot);\n      this.saveEye.copy(camera.position);\n      this.saveUp.copy(camera.up);\n      this.useSnap = false;\n      this.doCustomOrbit = false;\n    }\n\n    if (IsCombined() && prevCenter == undefined) {\n      prevCenter = this.saveCenter.clone();\n      prevEye = this.saveEye.clone();\n      prevPivot = this.savePivot.clone();\n      prevUp = this.saveUp.clone();\n    }\n\n    // TODO: fold the two cases into one and prevent duplicate code\n    if (this.preserveOrbitUpDirection) {\n\n      var delta = convertCoordsToWindow(currentCursor.x - startCursor.x, currentCursor.y - startCursor.y);\n      var lastDelta = convertCoordsToWindow(distance.x, distance.y);\n\n      var worldUp = this.sceneUpDirection.clone();\n      var worldFront = this.sceneFrontDirection.clone();\n      var worldRight = this.sceneFrontDirection.clone().cross(this.sceneUpDirection).normalize();\n\n      /* ????? WTF:\n                                                                                                  var worldFront = new THREE.Vector3(1,0,0);\n                                                                                                  var worldUp = new THREE.Vector3(0,1,0);\n                                                                                                  */\n\n      //viewcube\n      // if (this.doCustomOrbit ) {\n      //     worldUp = new THREE.Vector3(0,1,0);\n      //     worldFront = new THREE.Vector3(1,0,0);\n      // }\n\n      /* ?????? WTF:\n      var worldR = worldFront.clone().cross( worldUp );\n      worldUp = worldR.clone().cross(worldFront);\n      worldUp.clone().normalize();\n      */\n\n      var pivot = IsCombined() ? prevPivot : this.savePivot;\n      var eye = IsCombined() ? prevEye : this.saveEye;\n      var center = IsCombined() ? prevCenter : this.saveCenter;\n      var camUp = IsCombined() ? prevUp : this.saveUp;\n\n      var initViewDir = pivot.clone().sub(eye).normalize();\n      var initViewDirV = center.clone().sub(eye).normalize();\n      var initRightDir = initViewDirV.clone().cross(camUp);\n\n      var fTargetDist = eye.clone().sub(pivot).length();\n      var fTargetDistV = eye.clone().sub(center).length();\n\n      var vLookUpdate = initViewDir.clone().multiplyScalar(-1);\n      var vLookUpdateV = initViewDirV.clone().multiplyScalar(-1);\n      var vRightUpdate = initRightDir;\n      var vUpUpdate = camUp.clone();\n\n      var snapAngleh = 0.0;\n      var snapAnglev = 0.0;\n\n      //viewcube\n\n      if (!this.constrainOrbitHorizontal) {\n        // Need to check if:\n        //  1. camera is \"upside-down\" (angle between world up and camera up is obtuse) or\n        //  2. camera is in top view (camera up perpendicular to world up and view angle acute to world up)\n        // These cases required a reversed rotation direction to maintain consistent mapping of tool:\n        //  left->clockwise, right->counter-clockwise\n        //\n        //  PHB June 2014 - #2 above makes no sense to me. If the camera up is perpendicular to the\n        //  world up then the view is parallel to world up (view dot up == 1). So the second test is\n        //  meaningless. There is no good way to determine the rotation direction in this case. If you\n        //  want it to feel like direct manipulation then it would be better to determine if the cursor\n        //  is above or below the pivot in screen space.\n\n        var worldUpDotCamUp = worldUp.dot(this.saveUp);\n        // var worldUpDotView  = worldUp.dot(this.saveCenter.clone().sub(this.saveEye).normalize());\n\n        // if ((worldUpDotCamUp < -MIN_VALUE) ||\n        //     ((Math.abs(worldUpDotCamUp) < MIN_VALUE) && (worldUpDotView > 0.0)))\n        //\n        var kFlipTolerance = 0.009; // Must be flipped by more than about 0.5 degrees\n        if (worldUpDotCamUp < -kFlipTolerance) {\n          delta.x = -delta.x;\n          lastDelta.x = -lastDelta.x;\n        }\n\n        var dHorzAngle = 0.0;\n        if (IsCombined()) {\n          dHorzAngle = lastDelta.x * this.orbitMultiplier;\n        } else {\n          dHorzAngle = this.useSnap ? this.lastSnapRotateX + getNextRotation('h', snapAngleh, -lastDelta.x) :\n          delta.x * this.orbitMultiplier;\n        }\n\n        this.lastSnapRotateX = dHorzAngle;\n        // Define rotation transformation\n\n        var quatH = new THREE.Quaternion().setFromAxisAngle(worldUp, -dHorzAngle);\n\n        vLookUpdate.applyQuaternion(quatH);\n        vLookUpdateV.applyQuaternion(quatH);\n        vRightUpdate.applyQuaternion(quatH);\n        vUpUpdate.applyQuaternion(quatH);\n      }\n\n      if (!this.constrainOrbitVertical) {\n        var vRightProjF = worldFront.clone().multiplyScalar(worldFront.dot(vRightUpdate));\n        var vRightProjR = worldRight.clone().multiplyScalar(worldRight.dot(vRightUpdate));\n        var vRightProj = vRightProjF.clone().add(vRightProjR);\n        vRightProj.clone().normalize();\n\n        var dVertAngle = 0.0;\n\n        if (IsCombined()) {\n          dVertAngle = lastDelta.y * this.orbitMultiplier;\n        } else {\n          var next = getNextRotation('v', snapAnglev, lastDelta.y);\n          dVertAngle = this.useSnap ? this.lastSnapRotateY + next : delta.y * this.orbitMultiplier;\n        }\n        var quatV = new THREE.Quaternion().setFromAxisAngle(vRightProj, -dVertAngle);\n\n        if (!this.navApi.getOrbitPastWorldPoles()) {\n\n          var vUpUpdateTemp = vUpUpdate.clone();\n          vUpUpdateTemp.applyQuaternion(quatV).normalize();\n\n          // Check if we've gone over the north or south poles:\n          var wDotC = worldUp.dot(vUpUpdateTemp);\n          if (wDotC < 0.0)\n          {\n            var vLookUpdateVtemp = vLookUpdateV.clone();\n            vLookUpdateVtemp.applyQuaternion(quatV).normalize();\n\n            // How far past Up are we?\n            var dVertAngle2 = vLookUpdateVtemp.angleTo(worldUp);\n            if (Math.abs(dVertAngle2) > Math.PI * 0.5)\n            dVertAngle2 -= dVertAngle2 > 0.0 ? Math.PI : -Math.PI;\n\n            dVertAngle -= dVertAngle2;\n\n            quatV.setFromAxisAngle(vRightProj, -dVertAngle);\n            vLookUpdate.applyQuaternion(quatV).normalize();\n            vLookUpdateV.applyQuaternion(quatV).normalize();\n            vUpUpdate.applyQuaternion(quatV).normalize();\n\n          } else\n\n          {\n            vLookUpdate.applyQuaternion(quatV).normalize();\n            vLookUpdateV.applyQuaternion(quatV).normalize();\n            vUpUpdate.applyQuaternion(quatV).normalize();\n          }\n        } else\n\n        {\n          vLookUpdate.applyQuaternion(quatV).normalize();\n          vLookUpdateV.applyQuaternion(quatV).normalize();\n          vUpUpdate.applyQuaternion(quatV).normalize();\n        }\n        this.lastSnapRotateY = dVertAngle;\n      }\n\n      // figure out new eye point\n      var vNewEye = vLookUpdate.multiplyScalar(fTargetDist).add(pivot);\n\n      camera.position.copy(vNewEye);\n      camera.up.copy(vUpUpdate);\n      this.center.copy(vNewEye);\n      this.center.sub(vLookUpdateV.multiplyScalar(fTargetDistV));\n\n      if (IsCombined())\n      {\n        prevCenter.copy(this.center);\n        prevEye.copy(camera.position);\n        prevPivot.copy(this.pivot);\n        prevUp.copy(camera.up);\n      }\n    } else\n    {\n      /*var lastDelta = convertCoordsToWindow(distance.x, distance.y);\n      var vDir = prevPivot.clone().sub(prevEye);\n      var vDirView = prevCenter.clone().sub(prevEye);\n      var vRight = vDirView.clone().cross(prevUp);\n      var vUp = vRight.clone().cross(vDirView);\n      vUp.clone().normalize();\n       var dist = (prevPivot.clone().sub(prevEye)).clone().length();\n      var distView = (prevCenter.clone().sub(prevEye)).clone().length();\n       var snapAngleh = 0.0;\n      var snapAnglev = 0.0;\n       //viewcube\n      //snapToClosestView(vUp, snapAngleh, snapAnglev);\n       if ( !this.constrainOrbitHorizontal ){\n       var dHorzAngle = this.useSnap ? getNextRotation(HORIZONTAL, snapAngleh, lastDelta.x):\n      lastDelta.x *this.orbitMultiplier;\n       var quatH = new THREE.Quaternion().setFromAxisAngle( vUp.clone().normalize(), dHorzAngle );\n      vDir = quatH.clone().rotate(vDir);\n      vDirView = quatH.clone().rotate(vDirView);\n      }\n       if ( !this.constrainOrbitVertical ){\n      var dVertAngle = this.useSnap ? getNextRotation(VERTICAL, snapAnglev, lastDelta.y) :\n      lastDelta.y *this.orbitMultiplier;\n       var quatV = new THREE.Quaternion().setFromAxisAngle( vRight.clone().normalize(), dVertAngle );\n      vDir = quatV.clone().rotate(vDir);\n      vDirView = quatV.clone().rotate(vDirView);\n      vUp = quatV.clone().rotate(vUp);\n      }\n       camera.eye = this.pivot.clone().sub((vDir.clone().normalize()).clone().multiplyScalar(dist));\n      this.center.copy(camera.eye.clone().add((vDirView.clone().normalize()).clone().multiplyScalar(distView)));\n      camera.up.copy(vUp.clone().normalize());\n       prevCenter = this.center;\n      prevEye = camera.position;\n      prevPivot = this.pivot;\n      prevUp = camera.up;*/\n\n\n\n\n\n\n\n\n\n\n    }\n    camera.lookAt(this.center);\n    changed(false);\n\n    /*avp.logger.log(\"Camera Position: ( \"+camera.position.x +\", \"+camera.position.y+\", \"+camera.position.z+\" )\");\n                    avp.logger.log(\"Up Vector: ( \"+camera.up.x +\", \"+camera.up.y+\", \"+camera.up.z+\" )\");\n                    avp.logger.log(\"Center: ( \"+this.center.x +\", \"+this.center.y+\", \"+this.center.z+\" )\");\n                    */\n  };\n\n  this.endInteraction = function () {\n\n    this.navApi.setTransitionActive(false);\n  };\n\n  this.look = function (distance) {\n    if (!this.navApi.isActionEnabled('walk'))\n    return;\n\n    var delta = convertCoordsToWindow(distance.x, distance.y);\n    var multiplier = this.userLookSpeed;\n\n    //if ( m_manager->GetApplicationParameters().lookInvertVerticalAxis ) { deltaY = -deltaY; }\n\n    var eyeToCenter = this.getView();\n\n    var camUp = camera.up;\n    var camRight = eyeToCenter.clone().cross(camUp).normalize();\n    var worldUp = this.sceneUpDirection.clone();\n\n    // TODO: scale look by camera's FOV\n    // vertical rotation around the camera right vector\n    var angle = delta.clone();\n    angle.x *= Math.PI;\n    angle.y *= Math.PI / camera.aspect;\n    angle.multiplyScalar(multiplier);\n    var qRotY = new THREE.Quaternion().setFromAxisAngle(camRight, -angle.y);\n\n    if (camera.keepSceneUpright && !this.navApi.getOrbitPastWorldPoles()) {\n      var futureUp = camUp.clone();\n      futureUp.applyQuaternion(qRotY).normalize();\n\n      if (futureUp.dot(worldUp) < 0) {\n        var futureEyeToCenter = eyeToCenter.clone();\n        futureEyeToCenter.applyQuaternion(qRotY);\n\n        var deltaAngle = futureEyeToCenter.angleTo(worldUp);\n\n        if (Math.abs(deltaAngle) > Math.PI * 0.5)\n        deltaAngle -= deltaAngle > 0.0 ? Math.PI : -Math.PI;\n\n        angle.y -= deltaAngle;\n\n        qRotY.setFromAxisAngle(camRight, -angle.y);\n      }\n    }\n\n    eyeToCenter = qRotY.clone().rotate(eyeToCenter);\n    camUp = qRotY.clone().rotate(camUp);\n    camUp.normalize();\n\n    var vertAxis = camera.keepSceneUpright ? worldUp : camUp;\n    var qRotX = new THREE.Quaternion().setFromAxisAngle(vertAxis, -angle.x);\n\n    eyeToCenter = qRotX.clone().rotate(eyeToCenter);\n    camUp = qRotX.clone().rotate(camUp);\n\n    this.center.copy(eyeToCenter.add(camera.position));\n    camera.up.copy(camUp);\n\n    camera.lookAt(this.center);\n    changed(false);\n  };\n\n  this.pan = function (distance) {\n    if (!this.navApi.isActionEnabled('pan'))\n    return;\n\n    distance = convertCoordsToWindow(distance.x, distance.y);\n\n    var W = this.getView();\n    var U = camera.up.clone().cross(W);\n    var V = W.clone().cross(U);\n\n    U.normalize();\n    V.normalize();\n    W.normalize();\n\n    var Pscreen = this.pivot.clone().sub(camera.position);\n    var screenW = W.clone().dot(Pscreen);\n    var screenU = screenW * (Math.tan(THREE.Math.degToRad(camera.leftFov)) + Math.tan(THREE.Math.degToRad(camera.rightFov)));\n    var screenV = screenW * (Math.tan(THREE.Math.degToRad(camera.topFov)) + Math.tan(THREE.Math.degToRad(camera.bottomFov)));\n\n    var offsetU = distance.x * Math.abs(screenU);\n    var offsetV = distance.y * Math.abs(screenV);\n\n    var offset = new THREE.Vector3();\n    var u = U.clone().multiplyScalar(offsetU);\n    var v = V.clone().multiplyScalar(offsetV);\n\n    offset = u.clone().add(v).clone().multiplyScalar(this.userPanSpeed);\n\n    camera.position.add(offset);\n    this.center.add(offset);\n\n    camera.lookAt(this.center);\n    changed(false);\n  };\n\n  this.zoom = function (zoomDelta) {\n    if (!this.navApi.isActionEnabled('zoom'))\n    return;\n\n    //TODO: bug - when pivot is set outside the object, object zooms past the pivot point\n    var zoomMin = 0.05;\n    var zoomBase = this.userZoomSpeed;\n    var distMax = Number.MAX_VALUE;\n    var deltaXY = zoomDelta.x + zoomDelta.y;\n    var dist = Math.pow(zoomBase, deltaXY);\n\n    var zoomPosition = this.pivot.clone().sub(this.pivot.clone().sub(this.saveEye).clone().multiplyScalar(dist));\n    var zoomCenter = zoomPosition.clone().add(cam.D.clone().multiplyScalar(cam.D.clone().dot(this.pivot.clone().sub(zoomPosition).clone())));\n\n    if (dist >= distMax)\n    return;\n\n    if (deltaXY > 0.0) {\n      var snapSize = 0;\n      var dist2 = Math.pow(zoomBase, deltaXY - snapSize);\n\n      // PERSP zoom out\n      if (deltaXY < snapSize) {\n        // inside the zoomout speedbump region\n        unitAmount = 0.0;\n        return;\n\n      } else {\n        camera.position.copy(zoomPosition);\n        this.center.copy(zoomCenter);\n\n        var EprojD = zoomPosition.clone().sub(this.saveEye).dot(cam.D);\n\n        if (EprojD > distMax) {\n          camera.position.copy(this.saveEye.sub(cam.D).clone().multiplyScalar(distMax));\n          unitAmount = distMax > 0.0 ? -1.0 : 0.0;\n        } else {\n          unitAmount = -(EprojD / distMax);\n        }\n      }\n    } else {\n\n\n      camera.position.copy(zoomPosition);\n      this.center.copy(zoomCenter);\n\n      //Zoom In\n      /*if ( dist < zoomMin) {\n          //exponential zoom moved in as far as it can\n          var zoomMinLinear = ( Math.log(zoomMin) / Math.log(zoomBase) );\n          var distLinearXY = Math.abs(deltaXY) - Math.abs(zoomMinLinear);\n          var snapSize = 0;\n           // do linear zoomin\n          if ( distLinearXY > snapSize ) {\n               var distLinearXY = distLinearXY - snapSize/window.innerHeight;\n              var amount = -distLinearXY;\n               var multiplier = this.userZoomSpeed;\n              var dist2 = amount * multiplier;\n               var Esnap = this.pivot.clone().sub((this.pivot.clone().sub(this.saveEye)).clone().multiplyScalar(zoomMin));\n              var E = Esnap.clone().sub((this.pivot.clone().sub(this.saveEye)).clone().multiplyScalar(dist2));\n               this.center.copy(E.clone().add(cam.D.clone().multiplyScalar(zoomMin)));\n              camera.position.copy(E);\n          }\n      } else {\n          cam.D = (this.saveCenter.clone().sub(this.saveEye)).clone().normalize();\n          camera.position.copy(zoomPosition);\n          this.center.copy(zoomCenter);\n      }*/\n\n\n\n\n\n    }\n    camera.lookAt(this.center);\n    changed(false);\n  };\n\n  this.walk = function (currentCursor, startCursor, movementX, movementY, deltaTime) {\n    if (!this.navApi.isActionEnabled('walk'))\n    return;\n\n    var worldUp = this.sceneUpDirection.clone();\n    var worldFront = this.sceneFrontDirection.clone();\n    var worldRight = this.sceneFrontDirection.clone().cross(this.sceneUpDirection);\n    //TODO: figure out what deltaTime does\n\n    var flyPlanarMotion = true;\n    var flyUpDownSensitivity = 0.01;\n\n    if (isInDeadZone(currentCursor, startCursor)) {\n      wheel.cursorImage('SWWalk');\n      setBias(true, currentCursor, startCursor);\n      x = startCursor.x;\n      y = startCursor.y;\n    } else {\n      setBias(false, currentCursor, startCursor);\n    }\n\n    //x = currentCursor.x - m_resetBiasX;\n    //y = currentCursor.y - m_resetBiasY;\n    x = currentCursor.x;\n    y = currentCursor.y;\n\n    var delta = convertCoordsToWindow(x - startCursor.x, y - startCursor.y);\n\n    var fInitialMoveX = -delta.x;\n    var fInitialMoveY = -delta.y;\n    var fSignX = fInitialMoveX < 0.0 ? -1.0 : 1.0;\n    var fSignY = fInitialMoveY < 0.0 ? -1.0 : 1.0;\n    var fMoveX = Math.abs(fInitialMoveX);\n    var fMoveY = Math.abs(fInitialMoveY);\n\n    var deadzoneRadius = new THREE.Vector2(30, 30);\n    deadzoneRadius = convertCoordsToWindow(deadzoneRadius.x, deadzoneRadius.y);\n\n    fMoveX = isInDeadZone(currentCursor, startCursor) ? 0.0 : Math.abs(fInitialMoveX) - deadzoneRadius.x;\n    fMoveY = isInDeadZone(currentCursor, startCursor) ? 0.0 : Math.abs(fInitialMoveY) - deadzoneRadius.y;\n\n    var rampRadius = 0.25;\n    fMoveX /= rampRadius;\n    fMoveY /= rampRadius;\n\n    fMoveX = fMoveX < 1.0 ? easeClamp(fMoveX, 0.0, 1.0) : Math.pow(fMoveX, 1.0);\n    fMoveY = fMoveY < 1.0 ? easeClamp(fMoveY, 0.0, 1.0) : Math.pow(fMoveY, 1.0);\n\n\n    // scale by time\n    //fMoveX *= deltaTime;\n    //fMoveY *= deltaTime;\n\n    var fDeltaX = fMoveX > 0.0 ? fMoveX * fSignX : 0.0;\n    var fDeltaY = fMoveY > 0.0 ? fMoveY * fSignY : 0.0;\n\n    var vViewDir = this.getView();\n    var fViewDist = vViewDir.length();\n    vViewDir.normalize();\n\n    var vRightDir = vViewDir.clone().cross(camera.up);\n    vRightDir.normalize();\n\n    // project vViewDir onto plane perpendicular to up direction to get\n    // better walking inside houses, etc\n    // (but prevents flying down to model from 3/4 view...)\n\n    var vYViewDirRight = worldRight.clone().multiplyScalar(worldRight.clone().dot(vViewDir));\n    var vYviewDirFront = worldFront.clone().multiplyScalar(worldFront.clone().dot(vViewDir));\n    var vYViewDir = vYviewDirFront.clone().add(vYViewDirRight);\n\n    vYViewDir = vYViewDir.clone().length() > MIN_VALUE ? vYViewDir.normalize() : camera.up;\n\n    var scale = 1.0;\n    var fDollyDist = fDeltaY * (this.walkMultiplier * scale);\n\n    var dir = flyPlanarMotion ? vYViewDir : vViewDir;\n\n\n    // Free-flying or constrained walk?\n    if (flyPlanarMotion) {\n      // Constrained Walk\n      // To avoid perceptually confusing motion, force a reversal of flying direction along a shifted axis\n\n      // Angle to offset threshold from up-axis\n      // TODO: make cos(0.65) into an AutoCam Parameter\n      var dDirThreshold = Math.cos(0.65);\n\n      if (dDirThreshold != 1 && (\n      worldUp.clone().dot(camera.up) < -MIN_VALUE && worldUp.clone().dot(vViewDir) < -dDirThreshold ||\n      worldUp.clone().dot(camera.up) > MIN_VALUE && worldUp.clone().dot(vViewDir) > dDirThreshold)) {\n        dir = -dir;\n      }\n    }\n\n\n    var fSpinAngle = -fDeltaX * this.walkMultiplier * 0.05;\n\n    // rotate around world-up vector instead of CameraOperations up vector (more like head movement!)\n    //Quaternion quat( m_cameraParams.up, (float)fSpinAngle );\n\n    // Define rotation axis direction\n    var vRotAxis = camera.up;\n\n    // Free-flying or constrained walk?\n    if (flyPlanarMotion) {\n      // Constrained Walk\n      // Need to check if:\n      //  1. camera is \"upside-down\" (angle between world up and camera up is obtuse) or\n      //  2. camera is in top view (camera up perpendicular to world up and view angle acute to world up)\n      // These cases require a reversed rotation direction to maintain consistent mapping of tool:\n      //  left->clockwise, right->counter-clockwise\n      if (worldUp.clone().dot(camera.up) < -MIN_VALUE ||\n      Math.abs(worldUp.clone().dot(camera.up)) < MIN_VALUE &&\n      worldUp.clone().dot(vViewDir) > MIN_VALUE) {\n        fSpinAngle = -fSpinAngle;\n      }\n      vRotAxis = worldUp;\n    }\n\n    // Define rotation transformation\n\n    var quat = new THREE.Quaternion().setFromAxisAngle(vRotAxis, fSpinAngle);\n    quat.normalize();\n\n    vViewDir = quat.clone().rotate(vViewDir);\n    vViewDir.normalize();\n    camera.up.copy(quat.clone().rotate(camera.up));\n    camera.up.normalize();\n\n    camera.position.add(dir.clone().multiplyScalar(fDollyDist));\n    this.center.copy(camera.position.clone().add(vViewDir.clone().multiplyScalar(fViewDist)));\n\n    dir = flyPlanarMotion ? worldUp : camera.up;\n    dir.normalize();\n\n    if (fDollyDist === 0)\n    fDollyDist = flyUpDownSensitivity;\n\n    camera.lookAt(this.center);\n    changed(false);\n  };\n\n  this.updown = function (movementY) {\n    if (this.navApi.getIsLocked())\n    return;\n\n    var deltaCursor = movementY;\n    var deltaAmount = getMoveAmountFromCursorOffset(deltaCursor);\n\n    cam.m_amount += deltaAmount;\n\n    var upDir = new THREE.Vector3(0, 1, 0);\n\n    var eye = cam.saveEye.clone().sub(upDir.clone().multiplyScalar(cam.m_amount));\n    var eyeHeight = eye.clone().dot(upDir);\n\n    camera.position.copy(eye);\n\n    if (eyeHeight < cam.minSceneBound) {\n      camera.position.add(upDir.clone().multiplyScalar(cam.minSceneBound - eyeHeight));\n    }\n\n    if (eyeHeight > cam.maxSceneBound) {\n      camera.position.add(upDir.clone().multiplyScalar(cam.maxSceneBound - eyeHeight));\n    }\n\n    this.center.copy(camera.position.clone().add(cam.saveCenter.clone().sub(cam.saveEye)));\n    camera.lookAt(this.center);\n    changed(false);\n  };\n};\n\nGlobalManagerMixin.call(Autocam.prototype);","\n\"use strict\";function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}var _require =\nrequire('../../compat'),getGlobal = _require.getGlobal;\n\nvar _window = getGlobal();\n\n// Returned by animation functions to enable interruption\nfunction AnimControl() {\n  // Function to interrupt animation\n  this.stop = null;\n\n  // False indicates that animation is stopped or finished.\n  this.isRunning = true;\n}\n\n// Invoke an animated transition. On each frame, the given setParam() function is called\n// with a value between startValue (at startTime) and endValue (at endTime).\n//  @param {number}   startValue\n//  @param {number}   endValue\n//  @param {number}   duration     - in seconds\n//  @param {function} setParam     - callback that is called with interpolated value in [startValue, endValue]\n//  @param {function] [onFinished] - optional callback triggered when fading is done.\n//  @returns {AnimControl}\nfunction fadeValue(startVal, endVal, duration, setParam, onFinished) {\n\n  var startTime = performance.now();\n\n  var durationInMs = 1000.0 * duration;\n\n  var reqId = 0;\n\n  // Create control object to interrupt anim\n  var control = new AnimControl();\n\n  control.stop = function () {\n    // cancel next update\n    if (reqId) _window.cancelAnimationFrame(reqId);\n\n    control.isRunning = false;\n  };\n\n  // Fast-forward anim: Simulates that the anim time has fast. Unlike stop(), it invokes \n  // the last frame immediately and calls onFinished().\n  control.skip = function () {\n    if (control.isRunning) {\n      setParam(endVal); // invoke last anim frame\n      control.stop(); // make sure that onNextFrame is not called anymore\n      onFinished && onFinished();\n    }\n  };\n\n  // on each frame, call setParam and request next call until time is up\n  var onNextFrame = function onNextFrame(timeStamp) {\n\n    // compute unit time [0,1]\n    var unitTime = (timeStamp - startTime) / durationInMs;\n\n    // clamp unitTime to [0,1]\n    unitTime = Math.max(unitTime, 0.0);\n    unitTime = Math.min(unitTime, 1.0);\n\n    // compute interpolated value\n    var t = startVal + unitTime * (endVal - startVal);\n\n    // update param\n    setParam(t);\n\n    // request next call if fading is not finished\n    if (unitTime < 1.0) {\n      reqId = _window.requestAnimationFrame(onNextFrame);\n    } else {\n      control.isRunning = false;\n      if (onFinished) {\n        onFinished();\n      }\n    }\n  };\n\n  // start fade animation\n  onNextFrame(startTime);\n\n  return control;\n}\n\n// Makes it easy to smoothly animate any parameter values, e.g.,\n// opacity or size of a shape etc.\nvar AnimatedParam = /*#__PURE__*/function () {\n\n  // @param {number}           initValue - Intial parameter value\n  // @param {function(number)} setValue  - Defines how to set the parameter to be animated.\n  // @param {number}           number    - fade transition time in seconds.\n  function AnimatedParam(initValue, setValue, animTime) {_classCallCheck(this, AnimatedParam);\n    this.setValueCb = setValue;\n    this.animTime = animTime;\n\n    // {AnimControl} Allows stopping currently running transition (if any)\n    this.fadeAnim = null;\n\n    // Latest value set from outside. This value is either currently set or \n    // we are animating to it.\n    this.targetValue = initValue;\n\n    // Make sure that curValue and actual param state are \n    // consistently set to the start value.\n    this.curValue = initValue;\n    setValue(initValue);\n\n    // onFinished callbacks to be invoked at the end of current anim\n    this.pendingFinishedCallbacks = [];\n  }_createClass(AnimatedParam, [{ key: \"_stopAnim\", value: function _stopAnim()\n\n    {\n      if (this.fadeAnim) {\n        this.fadeAnim.stop();\n        this.fadeAnim = null;\n      }\n    }\n\n    // process all onFinished callbacks and clear them\n  }, { key: \"_onAnimEnded\", value: function _onAnimEnded() {\n      this.pendingFinishedCallbacks.forEach(function (cb) {return cb();});\n      this.pendingFinishedCallbacks.length = 0;\n    }\n\n    // Smoothly fade-over to the given parameter value.\n    // If this value is already set or being animated to, the call has no effect.       \n    // @param {number}     value\n    // @param {function()} [onFinished] - Called (only) if value is reached. Will not be called\n    //                                    if transition is interrupted before reaching the value.\n  }, { key: \"fadeTo\", value: function fadeTo(value, onFinished) {var _this = this;\n\n      var animating = this.fadeAnim && this.fadeAnim.isRunning;\n\n      // Simplest case: No anim running and value already reached\n      if (!animating && this.curValue == value) {\n        onFinished && onFinished();\n        return;\n      }\n\n      // Make sure that onFinished is triggered later\n      if (onFinished) {\n        this.pendingFinishedCallbacks.push(onFinished);\n      }\n\n      // Avoid triggering a (new) animation if the target value didn't change\n      if (animating && value === this.targetValue) {\n        return;\n      }\n\n      // Interrupt anim to a prior value (if any)\n      this._stopAnim();\n\n      // Update param during transition\n      var onTimer = function onTimer(t) {\n\n        // let anim start/stop smoothly\n        t = smootherStep(t);\n\n        _this.curValue = t;\n        _this.setValueCb(t);\n      };\n\n      // Start transition from current value to new target value\n      this.targetValue = value;\n      this.fadeAnim = fadeValue(this.curValue, this.targetValue, this.animTime, onTimer, function () {return _this._onAnimEnded();});\n    }\n\n    // Skips current animation (if any)\n  }, { key: \"skipAnim\", value: function skipAnim() {\n      if (this.fadeAnim) {\n        this.fadeAnim.skip();\n      }\n    }\n\n    // Set value immediately - without any transition\n  }, { key: \"setValue\", value: function setValue(value) {\n      this._stopAnim();\n\n      this.curValue = value;\n      this.setValueCb(value);\n    } }]);return AnimatedParam;}();\n\n\n// Can be replaced by THREE.Math.lerp later (not contained in our current THREE version)\nfunction lerp(x, y, t) {\n  return (1 - t) * x + t * y;\n}\n\nfunction smootherStep(t) {\n  return THREE.Math.smootherstep(t, 0.0, 1.0);\n}\n\nfunction SimpleTransition(viewer) {\n\n  // start/end camera\n  var _startPos = new THREE.Vector3();\n  var _startTarget = new THREE.Vector3();\n  var _startUp = new THREE.Vector3();\n  var _endPos = new THREE.Vector3();\n  var _endTarget = new THREE.Vector3();\n  var _endUp = new THREE.Vector3();\n\n  // interpolate target distance separately from orientation. Note that the target distance\n  // is relevant for the orthoscale.\n  var _startTargetDist = 0.0;\n  var _endTargetDist = 0.0;\n\n  // start/end orientation matrix as quaternions\n  var _qStart = new THREE.Quaternion(); // at start\n  var _qEnd = new THREE.Quaternion(); // at end: camera looks at dst target\n\n  // temp objects for reuse\n  var _tmpVec = new THREE.Vector3();\n  var _tmpQuat = new THREE.Quaternion();\n  var _tmpObj = new THREE.Object3D();\n  var _tmpMatrix = new THREE.Matrix4();\n\n  // Updates camera view direction based on given quaternion.\n  function setFromQuaternion(camera, quat, targetDist) {\n\n    // set target\n    _tmpVec.set(0, 0, -targetDist).applyQuaternion(quat);\n    camera.target.addVectors(camera.position, _tmpVec);\n\n    // set up-vector\n    _tmpVec.set(0, 1, 0).applyQuaternion(quat);\n    camera.up.copy(_tmpVec);\n  }\n\n  // Compute quaternion to rotate camera in a way that it looks towards the given target and\n  // respects the given up direction.\n  function computeQuaternion(result, pos, target, up) {\n\n    // NOTE: Actually, we could just use lookAt + setFromRotationMatrix from THREE as below:\n    //\n    //     _tmpMatrix.lookAt(pos, target, up);\n    //     result.setFromRotationMatrix(_tmpMatrix);\n    //\n    // However, for some target views, direction and up-vector are collinear, so that a valid up-vector\n    // is not properly defined. For this case, it is essential to use the same heuristic as the\n    // LMV navigation does. Otherwise, the camera up vector may suddenly flip.\n    Autodesk.Viewing.Navigation.prototype.orient(_tmpObj, target, pos, up);\n    result.copy(_tmpObj.quaternion);\n  }\n\n  function initQuaternions() {\n\n    // take qStart from initial camera\n    computeQuaternion(_qStart, _startPos, _startTarget, _startUp);\n\n    // quaternion for final view\n    computeQuaternion(_qEnd, _endPos, _endTarget, _endUp);\n  }\n\n  this.init = function (startCamera, dstPos, dstTarget, dstUp) {var worldUpAligned = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : true;\n    _startPos.copy(startCamera.position);\n    _startTarget.copy(startCamera.target);\n    _startUp.copy(worldUpAligned ? startCamera.worldup : startCamera.up);\n    _endPos.copy(dstPos);\n    _endTarget.copy(dstTarget);\n    _endUp.copy(worldUpAligned ? startCamera.worldup : dstUp);\n\n    _startTargetDist = _startPos.distanceTo(_startTarget);\n    _endTargetDist = _endPos.distanceTo(_endTarget);\n\n    initQuaternions();\n  };\n\n  this.updateCamera = function (unitTime, camera) {\n\n    var t = smootherStep(unitTime);\n\n    // interpolate position\n    camera.position.lerpVectors(_startPos, _endPos, t);\n\n    // interpolate view direction\n    THREE.Quaternion.slerp(_qStart, _qEnd, _tmpQuat, t);\n    _tmpQuat.normalize();\n\n    // interpolate target distance\n    var targetDist = lerp(_startTargetDist, _endTargetDist, t);\n\n    setFromQuaternion(camera, _tmpQuat, targetDist);\n\n    // trigger viewer update\n    camera.dirty = true;\n  };\n\n  this.updateViewerCamera = function (unitTime, viewer) {\n    this.updateCamera(unitTime, viewer.impl.camera);\n    viewer.impl.syncCamera();\n    viewer.impl.invalidate(true, true);\n  };\n}\n\nvar _transition;\n\n// @param {Viewer3D}      viewer\n// @param {THREE.Vector3} destView.position  - end position\n// @param {THREE.Vector3} destView.target    - end target position\n// @param {number=2}      duration           - in seconds\n// @param {function}      onFinished         - optional callback triggered when animation is finished\n// @param {boolean}       [worldUpAligned]     - Whether the final view will be world aligned or not. Default is true.\n// @returns {AnimControl}\nfunction flyToView(viewer, destView, duration, onFinished) {var worldUpAligned = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : true;\n\n  if (!_transition)\n  _transition = new SimpleTransition();\n\n  // apply default duration\n  duration = duration || 2.0;\n\n  // init transition from current viewer camera\n  var cam = viewer.impl.camera;\n  _transition.init(cam, destView.position, destView.target, destView.up, worldUpAligned);\n\n  // define onTimer handler that updates the camera\n  var onTimer = function onTimer(unitTime) {\n    _transition.updateViewerCamera(unitTime, viewer);\n  };\n\n  return fadeValue(0.0, 1.0, duration, onTimer, onFinished);\n}\n\n/** Helper for smooth fadeIn/fadeOut of ground shadow and SAO \n   *  @param {Viewer3D}       viewer\n   *  @param {number}         fadeDuration - in seconds\n   *  @param {function(bool)} [onFadeDone] - Optional callback. Bool param is: true = faded in, false = faded out.\n   */\nfunction ShadowFader(viewer, fadeDuration, onFadeDone) {\n\n  // intensity multiplier for SAO and ground shadow\n  var _value = 1.0;\n\n  // AnimControl (if fading is in progress)\n  var _fadeAnim = null;\n  var _viewer = viewer;\n\n  var _fadeDuration = fadeDuration;\n\n  // If an anim is in progress, _fading indicates the direction (fading in or out)\n  var _fadingIn = undefined;\n\n  var _onFadeDone = onFadeDone;\n\n  function onTimer(t) {\n    _value = t;\n    viewer.impl.setGroundShadowAlpha(t);\n  }\n\n  function onFadeEnd() {\n    _fadeAnim = null;\n\n    // trigger optional callback\n    if (_onFadeDone) {\n      _onFadeDone(_fadingIn);\n    }\n  }\n\n  // Make sure that SAO/Shadow is faded to full visibility\n  this.shadowOn = function () {\n\n    // If already fading in, we are done\n    if (_fadeAnim && _fadingIn) {\n      return;\n    }\n\n    // If fading-out, stop it\n    if (_fadeAnim && !_fadingIn) {\n      _fadeAnim.stop();\n      _fadeAnim = null;\n    }\n\n    // already full intensity => done\n    if (_value >= 1.0) {\n      return;\n    }\n\n    // compute duration based on intensity change\n    var fadingDist = 1.0 - _value;\n    var duration = _fadeDuration * fadingDist;\n\n    // Fade from current intensity value to 1.0\n    _fadeAnim = fadeValue(_value, 1.0, duration, onTimer, onFadeEnd);\n\n    _fadingIn = true;\n  };\n\n  this.shadowOff = function () {\n\n    // already fading out => done\n    if (_fadeAnim && !_fadingIn) {\n      return;\n    }\n\n    // fading in => stop it\n    if (_fadeAnim && _fadingIn) {\n      _fadeAnim.stop();\n      _fadeAnim = null;\n    }\n\n    // already 0 intensity => done\n    if (_value <= 0.0) {\n      return;\n    }\n\n    var duration = _fadeDuration * _value;\n    _fadeAnim = fadeValue(_value, 0.0, duration, onTimer, onFadeEnd);\n\n    _fadingIn = false;\n  };\n\n  this.isFading = function () {\n    return _fadeAnim && _fadeAnim.isRunning;\n  };\n};\n\nmodule.exports = {\n  flyToView: flyToView,\n  ShadowFader: ShadowFader,\n  lerp: lerp,\n  smootherStep: smootherStep,\n  fadeValue: fadeValue,\n  AnimatedParam: AnimatedParam };","function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {try {var info = gen[key](arg);var value = info.value;} catch (error) {reject(error);return;}if (info.done) {resolve(value);} else {Promise.resolve(value).then(_next, _throw);}}function _asyncToGenerator(fn) {return function () {var self = this,args = arguments;return new Promise(function (resolve, reject) {var gen = fn.apply(self, args);function _next(value) {asyncGeneratorStep(gen, resolve, reject, _next, _throw, \"next\", value);}function _throw(err) {asyncGeneratorStep(gen, resolve, reject, _next, _throw, \"throw\", err);}_next(undefined);});};} /**\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    * Wrapper for the WebAssembly API.\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    * This class will initialize a WebAssembly module from the supplied wasm `path`.\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    *\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    * @param {String} path - path to the wasm file.\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    * @param {Object} options\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    * @param {Number} options.initial - The initial size of the WebAssembly memory. The number should be in WebAssembly pages (each page is 64K).\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    * @param {Number} options.maximum - The maximum size that the WebAssembly memory is allowed to grow to.\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    * @constructor\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    */\nexport function Wasm(path, options) {\n  // Make sure that WebAssembly is supported for the current browser.\n  try {\n    // Polyfill instantiateStreaming for browsers missing it\n    if (!WebAssembly.instantiateStreaming) {\n      WebAssembly.instantiateStreaming = /*#__PURE__*/function () {var _ref = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee(resp, importObject) {var source;return regeneratorRuntime.wrap(function _callee$(_context) {while (1) {switch (_context.prev = _context.next) {case 0:_context.next = 2;return (\n                    resp);case 2:_context.next = 4;return _context.sent.arrayBuffer();case 4:source = _context.sent;_context.next = 7;return (\n                    WebAssembly.instantiate(source, importObject));case 7:return _context.abrupt(\"return\", _context.sent);case 8:case \"end\":return _context.stop();}}}, _callee);}));return function (_x, _x2) {return _ref.apply(this, arguments);};}();\n\n    }\n  } catch (err) {\n    throw new Error('WebAssembly is not supported for the current browser.');\n  }\n\n  if (!path) {\n    throw new Error('Expecting a wasm file path.');\n  }\n\n  // Set the default memory to 256 (16MB) WebAssembly pages (each page is 64K).\n  var initial = 256;\n  var maximum = 256;\n  if (options && options.memory) {\n    initial = options.memory.initial;\n    maximum = options.memory.maximum;\n  }\n\n  this._wasmPath = path;\n\n  this._memory = new WebAssembly.Memory({ initial: initial, maximum: maximum });\n}\n\nWasm.prototype.constructor = Wasm;\n\n/**\n                                    * Instantiate the WebAssembly instance for the specified wasm file.\n                                    * @returns {Promise} - resolves with the wasm exorted functions\n                                    */\nWasm.prototype.instantiate = function () {var _this = this;\n  // Specify an importObject: this provides the environment Web Assembly runs in as well as any other parameters for instantiation.\n  var env = {\n    abortStackOverflow: function abortStackOverflow(_) {\n      throw new Error('overflow');\n    },\n    // The table properties configure the function table passed to Web Assembly.\n    // This is used when we allow the Web Assembly code call methods in JS. For this part, it can be zero/empty—we as we don't currently use it.\n    // The WebAssembly.Table() constructor creates a new Table object of the given size and element type.\n    // This is a JavaScript wrapper object — an array-like structure representing a WebAssembly Table, which stores function references.\n    // A table created by JavaScript or in WebAssembly code will be accessible and mutable from both JavaScript and WebAssembly.\n    table: new WebAssembly.Table({ initial: 0, maximum: 0, element: 'anyfunc' }),\n    __table_base: 0,\n    memory: this._memory, // Specifies where the heap should begin\n    __memory_base: 1024,\n    // STACK specifies where the stack should appear.\n    // It starts at STACK_MAX and works upwards (i.e., towards zero)—so STACK_MAX starts at total size of our memory, from memory.buffer.byteLength.\n    STACKTOP: 0,\n    STACK_MAX: this.getBuffer().byteLength };\n\n  var importObject = { env: env };\n\n  return new Promise(function (resolve, reject) {\n    try {\n      WebAssembly.instantiateStreaming(fetch(_this._wasmPath), importObject).then(function (instantiatedModule) {\n        var wasmExports = instantiatedModule.instance.exports;\n        _this.proxy = wasmExports;\n        resolve(wasmExports);\n      });\n    } catch (error) {\n      reject(error);\n    }\n  });\n};\n\n/**\n    * Returns the buffer associated with the WebAssembly Memory instance.\n    * @returns {ArrayBuffer} - returns the WebAssembly.Memory.buffer\n    */\nWasm.prototype.getBuffer = function () {\n  return this._memory.buffer;\n};","\nimport { isMobileDevice } from \"../compat\";\n\n// If true, will use a different code path where data structures are\n// optimized for using less memory.\nexport var memoryOptimizedLoading = true;\nexport var GPU_MEMORY_LIMIT = (isMobileDevice() ? 64 : 256) * 1024 * 1024;\nexport var GPU_OBJECT_LIMIT = isMobileDevice() ? 2500 : 10000;\n\n//VAO objects do have quite a bit of memory overhead, so use of VAO can be optionally\n//turned off\nexport var USE_VAO = !isMobileDevice();\n\n// Overhead for geometry buffer. 112 bytes by the BufferGeometry object, 112 bytes for\n// each of the index and vertex buffer arrays. The buffer used by the index and vertex\n// buffer arrays is shared by multiple geometry objects, so we don't include the 64\n// byte overhead for that.\n//TODO: TS Check with Cleve how the 112 for the index and vertex arrays is calculated. The 112 for BufferGeometry\n//comes from the memory profiler which shows 104 for those.\nexport var GEOMETRY_OVERHEAD = 336;\n\n// This is the threshold of the projected screen pixel for culling.\nexport var PIXEL_CULLING_THRESHOLD = 1;","import * as THREE from \"three\";\nimport background_vert from './shaders/background_vert.glsl';\nimport background_frag from './shaders/background_frag.glsl';\n\nexport var BackgroundShader = {\n\n  uniforms: {\n    \"color1\": { type: \"v3\", value: new THREE.Vector3(41.0 / 255.0, 76.0 / 255.0, 120.0 / 255.0) },\n    \"color2\": { type: \"v3\", value: new THREE.Vector3(1.0 / 255.0, 2.0 / 255.0, 3.0 / 255.0) },\n    \"opacity\": { type: \"f\", value: 1.0 },\n    //\"irradianceMap\": {type: \"t\", value: 1.0},\n    \"envMap\": { type: \"t\", value: null },\n    \"envRotationSin\": { type: \"f\", value: 0.0 },\n    \"envRotationCos\": { type: \"f\", value: 1.0 },\n    \"exposureBias\": { type: \"f\", value: 1.0 },\n    \"envMapExposure\": { type: \"f\", value: 1.0 },\n    \"uCamDir\": { type: \"v3\", value: new THREE.Vector3() },\n    \"uCamUp\": { type: \"v3\", value: new THREE.Vector3() },\n    \"uResolution\": { type: \"v2\", value: new THREE.Vector2(600, 400) },\n    \"uHalfFovTan\": { type: \"f\", value: 0.5 },\n    \"envMapBackground\": { type: \"i\", value: 0 } },\n\n\n\n  vertexShader: background_vert,\n  fragmentShader: background_frag };","//Replacement for the THREE BasicMaterial adding cut plane support\n\nimport * as THREE from \"three\";\nimport { ShaderChunks as chunks } from './ShaderChunks';\nimport basic_vert from './shaders/basic_vert.glsl';\nimport basic_frag from './shaders/basic_frag.glsl';\n\nexport var BasicShader = {\n\n  uniforms: THREE.UniformsUtils.merge([\n\n  THREE.UniformsLib[\"common\"],\n  THREE.UniformsLib[\"fog\"],\n  THREE.UniformsLib[\"shadowmap\"],\n  chunks.CutPlanesUniforms,\n  chunks.IdUniforms,\n  chunks.ThemingUniform,\n  chunks.PointSizeUniforms,\n  chunks.WideLinesUniforms]),\n\n\n  vertexShader: basic_vert,\n  fragmentShader: basic_frag };\n\n\n\nTHREE.ShaderLib['firefly_basic'] = BasicShader;","// Shader that composes a final frame from the color target, SAO target, and overlays target.\nimport * as THREE from \"three\";\nimport { ShaderChunks as chunks } from './ShaderChunks';\nimport screen_quad_uv_vert from './shaders/screen_quad_uv_vert.glsl';\nimport blend_frag from './shaders/blend_frag.glsl';\n\n// defines: {\n//     USE_MODEL_ID\n// }\n\nexport var BlendShader = {\n\n  uniforms: THREE.UniformsUtils.merge([\n\n  chunks.DepthTextureUniforms,\n\n  {\n    \"tDiffuse\": { type: \"t\", value: null }, //Color buffer containing the rendered 3d model\n\n    \"tAO\": { type: \"t\", value: null }, //Ambient occlusion + depth buffer\n    \"useAO\": { type: \"i\", value: 0 }, //Whether to blend in the AO buffer\n    \"aoOpacity\": { type: \"f\", value: 0.625 }, //\"Transparency\" of the AO shadow -- used to reduce AO occlusion intensity globally in a linear way\n\n    \"tOverlay\": { type: \"t\", value: null }, //The selection/overlays buffer\n    \"useOverlay\": { type: \"i\", value: 0 }, //Whether to blend in the overlays\n    \"useOverlayAlpha\": { type: \"i\", value: 1 }, //Whether the blend fragment shader should use the alpha of the overlay target. This is turned on by default.\n\n    \"tID\": { type: \"t\", value: null }, //The ID buffer\n    \"tID2\": { type: \"t\", value: null }, //The model ID buffer\n    \"objIDv4\": { type: \"v4\", value: new THREE.Vector4(0, 0, 0, 0) }, //The currently highlighted object ID as RGBA\n    \"modelIDv2\": { type: \"v2\", value: new THREE.Vector2(0, 0) }, //The currently highlighted model ID as RG\n    \"modelIDsv2v\": { type: \"v2v\", value: [] }, //Replaces modelIdv2 if multiple models are highlighted\n    \"edgeObjIDv4\": { type: \"v4\", value: new THREE.Vector4(0, 0, 0, 0) }, //The currently selected object ID as RGBA\n    \"edgeModelIDv2\": { type: \"v2\", value: new THREE.Vector2(0, 0) }, //The currently selected object model ID as RG\n    \"highlightIntensity\": { type: \"f\", value: 1.0 },\n    \"highlightColor\": { type: \"c\", value: new THREE.Color(1, 1, 1) },\n\n    \"resolution\": { type: \"v2\", value: new THREE.Vector2(1 / 1024, 1 / 512) }, // 1/size\n\n    //Enable these if the forward pass renders in HDR-linear target and the Blend shader is doing the tone mapping\n    //\"exposureBias\" : { type:\"f\", value: 1.0 },\n    //\"toneMapMethod\" : { type:\"i\", value: 0 }\n\n    \"selectionColor\": { type: \"c\", value: new THREE.Color(0, 0, 0) }, // The current highlight color\n    \"expand2dSelection\": { type: \"f\", value: 0.5 }, // amount to expand 2d selection, 0.0 to 1.0\n\n    // optional: blending between different targets/RenderModels\n    \"tCrossFadeTex0\": { type: \"t\", value: null }, // Additional color buffers with separate content\n    \"tCrossFadeTex1\": { type: \"t\", value: null }, // ..\n    \"crossFadeOpacity0\": { type: \"f\", value: 0.0 }, // opacity of crossFade tex 0\n    \"crossFadeOpacity1\": { type: \"f\", value: 0.0 }, // opacity of crossFade tex 1\n\n    \"highlightFullModel\": { type: \"f\", value: 0.0 } // either 0.0 or 1.0. For 1.0, objectID is ignored.\n  }]),\n\n\n  vertexShader: screen_quad_uv_vert,\n  fragmentShader: blend_frag };","import * as THREE from \"three\";\nimport { ShaderChunks as chunks } from './ShaderChunks';\nimport screen_quad_uv_vert from './shaders/screen_quad_uv_vert.glsl';\nimport cel_frag from './shaders/cel_frag.glsl';\n\nexport var CelShader = {\n\n  uniforms: THREE.UniformsUtils.merge([\n\n  chunks.DepthTextureUniforms,\n\n  {\n    \"tDiffuse\": { type: \"t\", value: null },\n    \"tID\": { type: \"t\", value: null },\n    \"resolution\": { type: \"v2\", value: new THREE.Vector2(1 / 1024, 1 / 512) },\n    \"cameraNear\": { type: \"f\", value: 1 },\n    \"cameraFar\": { type: \"f\", value: 100 },\n    \"tFill\": { type: \"t\", value: null },\n    \"tPaper\": { type: \"t\", value: null },\n    \"style\": { type: \"i\", value: 0 },\n    \"idEdges\": { type: \"i\", value: 1 },\n    \"normalEdges\": { type: \"i\", value: 1 },\n    \"depthEdges\": { type: \"i\", value: 1 },\n    \"brightness\": { type: \"f\", value: 0.0 },\n    \"contrast\": { type: \"f\", value: 0.0 },\n    \"grayscale\": { type: \"i\", value: 0 },\n    \"preserveColor\": { type: \"i\", value: 0.0 },\n    \"levels\": { type: \"f\", value: 6.0 },\n    \"repeats\": { type: \"f\", value: 3.0 },\n    \"rotation\": { type: \"f\", value: 0.0 },\n    \"outlineRadius\": { type: \"f\", value: 1.0 },\n    \"outlineNoise\": { type: \"i\", value: 0.0 },\n    \"tGraphite1\": { type: \"t\", value: null },\n    \"tGraphite2\": { type: \"t\", value: null },\n    \"tGraphite3\": { type: \"t\", value: null },\n    \"tGraphite4\": { type: \"t\", value: null },\n    \"tGraphite5\": { type: \"t\", value: null },\n    \"tGraphite6\": { type: \"t\", value: null },\n    \"tGraphite7\": { type: \"t\", value: null },\n    \"tGraphite8\": { type: \"t\", value: null } }]),\n\n\n\n  vertexShader: screen_quad_uv_vert,\n  fragmentShader: cel_frag };","//Trivial copy pass\n\nimport screen_quad_uv_vert from './shaders/screen_quad_uv_vert.glsl';\nimport copy_frag from './shaders/copy_frag.glsl';\n\nexport var CopyShader = {\n\n  uniforms: {\n    \"tDiffuse\": { type: \"t\", value: null } },\n\n\n  vertexShader: screen_quad_uv_vert,\n  fragmentShader: copy_frag };","import * as THREE from \"three\";\nimport { FloatToHalf } from \"./HalfFloat\";\nimport { logger } from \"../../logger/Logger\";\n\n\nexport function CreateCubeMapFromColors(ctop, cbot) {\n  var r1 = ctop.x * 255,g1 = ctop.y * 255,b1 = ctop.z * 255,\n  r2 = cbot.x * 255,g2 = cbot.y * 255,b2 = cbot.z * 255;\n\n  var pixelsTop = new Uint8Array(16);\n  var pixelsBot = new Uint8Array(16);\n  var pixelsSide = new Uint8Array(16);\n\n  for (var i = 0; i < 4; i++) {\n    pixelsTop[i * 4] = r1;\n    pixelsTop[i * 4 + 1] = g1;\n    pixelsTop[i * 4 + 2] = b1;\n    pixelsTop[i * 4 + 3] = 255;\n\n    pixelsBot[i * 4] = r2;\n    pixelsBot[i * 4 + 1] = g2;\n    pixelsBot[i * 4 + 2] = b2;\n    pixelsBot[i * 4 + 3] = 255;\n\n    // was this, which is wild: if (0 | (i / 2)) {\n    if (i > 1) {\n      // color sides 2 and 3 with the first color\n      pixelsSide[i * 4] = r1;\n      pixelsSide[i * 4 + 1] = g1;\n      pixelsSide[i * 4 + 2] = b1;\n      pixelsSide[i * 4 + 3] = 255;\n    } else\n    {\n      // color sides 0 and 1 with the second color\n      pixelsSide[i * 4] = r2;\n      pixelsSide[i * 4 + 1] = g2;\n      pixelsSide[i * 4 + 2] = b2;\n      pixelsSide[i * 4 + 3] = 255;\n    }\n  }\n\n  var x_neg = new THREE.DataTexture(pixelsSide, 2, 2, THREE.RGBAFormat);\n  var x_pos = new THREE.DataTexture(pixelsSide, 2, 2, THREE.RGBAFormat);\n  var y_neg = new THREE.DataTexture(pixelsBot, 2, 2, THREE.RGBAFormat);\n  var y_pos = new THREE.DataTexture(pixelsTop, 2, 2, THREE.RGBAFormat);\n  var z_neg = new THREE.DataTexture(pixelsSide, 2, 2, THREE.RGBAFormat);\n  var z_pos = new THREE.DataTexture(pixelsSide, 2, 2, THREE.RGBAFormat);\n\n  var texture = new THREE.Texture(null, THREE.CubeReflectionMapping,\n  THREE.RepeatWrapping, THREE.RepeatWrapping,\n  THREE.LinearFilter, THREE.LinearFilter,\n  //THREE.NearestFilter, THREE.NearestFilter,\n  THREE.RGBAFormat);\n  texture.image = [x_pos, x_neg, y_pos, y_neg, z_pos, z_neg];\n  texture.needsUpdate = true;\n\n  return texture;\n};\n\n\nvar M = [6.0014, -2.7008, -1.7996, -1.3320, 3.1029, -5.7721, 0.3008, -1.0882, 5.6268];\n\nfunction LogLuvDecode(dst, src) {\n\n  var Le = src[2] * 255.0 + src[3];\n  var Xp_Y_XYZp_y = Math.pow(2.0, (Le - 127.0) / 2.0);\n  var Xp_Y_XYZp_z = Xp_Y_XYZp_y / src[1];\n  var Xp_Y_XYZp_x = src[0] * Xp_Y_XYZp_z;\n\n  var r = M[0] * Xp_Y_XYZp_x + M[3] * Xp_Y_XYZp_y + M[6] * Xp_Y_XYZp_z;\n  var g = M[1] * Xp_Y_XYZp_x + M[4] * Xp_Y_XYZp_y + M[7] * Xp_Y_XYZp_z;\n  var b = M[2] * Xp_Y_XYZp_x + M[5] * Xp_Y_XYZp_y + M[8] * Xp_Y_XYZp_z;\n\n  if (r < 0) r = 0;\n  if (g < 0) g = 0;\n  if (b < 0) b = 0;\n\n  dst[0] = r;\n  dst[1] = g;\n  dst[2] = b;\n}\n\nfunction RGBMEncode(dst, src, expScale) {\n\n  var r = Math.sqrt(src[0] * expScale) * 0.0625; // 1/16 = 0.0625\n  var g = Math.sqrt(src[1] * expScale) * 0.0625;\n  var b = Math.sqrt(src[2] * expScale) * 0.0625;\n\n  var maxL = Math.max(Math.max(r, g), Math.max(b, 1e-6));\n  if (maxL > 1.0)\n  maxL = 1.0;\n\n  var w = Math.ceil(maxL * 255.0) / 255.0;\n\n  if (r > 1.0)\n  r = 1.0;\n  if (g > 1.0)\n  g = 1.0;\n  if (b > 1.0)\n  b = 1.0;\n\n  dst[3] = w;\n  var a = 1.0 / w;\n\n  dst[0] = r * a;\n  dst[1] = g * a;\n  dst[2] = b * a;\n}\n\nfunction RGB16Encode(dst, src, expScale) {\n\n  var r = Math.sqrt(src[0] * expScale);\n  var g = Math.sqrt(src[1] * expScale);\n  var b = Math.sqrt(src[2] * expScale);\n\n  //That's pretty unlikely to happen...\n  var MAX_HALF = 65504;\n  if (r > MAX_HALF)\n  r = MAX_HALF;\n  if (g > MAX_HALF)\n  g = MAX_HALF;\n  if (b > MAX_HALF)\n  b = MAX_HALF;\n\n  dst[0] = r;\n  dst[1] = g;\n  dst[2] = b;\n\n}\n\n\nvar tmpSrc = new Float32Array(4);\nvar tmpDst = new Float32Array(4);\n\n//Converts incoming environment cube maps to image format suitable for use by the shader.\nexport function DecodeEnvMap(map, exposure, useHalfFloat, callback) {\n\n  if (!map.LogLuv) {\n    logger.warn(\"Environment map expected to be in LogLuv format.\");\n    return;\n  }\n\n  var scale = Math.pow(2.0, exposure);\n\n  // if `map.image` is an array, use it as it is, otherwise create an array with single item (`map.image`) in it\n  var images = Array.isArray(map.image) ? map.image : [map.image];\n\n  for (var i = 0; i < images.length; i++) {\n\n    var image = images[i];\n\n    for (var j = 0; j < image.mipmaps.length; j++) {\n\n      var mipmap = image.mipmaps[j];\n\n      var src = mipmap.data;\n\n      var dst;\n      if (useHalfFloat) {\n        //var dst = new Float32Array(src.length / 4 * 3);\n        dst = new Uint16Array(src.length / 4 * 3);\n        mipmap.data = dst;\n      } else\n\n      dst = src.buffer;\n\n      var m = 0;\n\n      for (var k = 0; k < src.length; k += 4) {\n\n        tmpSrc[0] = src[k] / 255.0;\n        tmpSrc[1] = src[k + 1] / 255.0;\n        tmpSrc[2] = src[k + 2] / 255.0;\n        tmpSrc[3] = src[k + 3] / 255.0;\n\n        LogLuvDecode(tmpDst, tmpSrc);\n\n        if (useHalfFloat) {\n          //Use sqrt to gamma-compress the data to help the texture filtering\n          //hardware.\n          RGB16Encode(tmpSrc, tmpDst, scale);\n          dst[m++] = FloatToHalf(tmpSrc[0]);\n          dst[m++] = FloatToHalf(tmpSrc[1]);\n          dst[m++] = FloatToHalf(tmpSrc[2]);\n        } else {\n          //Temporary: decode incoming LogLUV environments and convert them\n          //to RGBM format for use by the shader. Eventually we will use half-float format\n          //instead, but that has to be better tested.\n          RGBMEncode(tmpSrc, tmpDst, scale);\n\n          src[k] = Math.round(tmpSrc[0] * 255.0);\n          src[k + 1] = Math.round(tmpSrc[1] * 255.0);\n          src[k + 2] = Math.round(tmpSrc[2] * 255.0);\n          src[k + 3] = Math.round(tmpSrc[3] * 255.0);\n        }\n      }\n\n    }\n\n  }\n\n  map.LogLuv = false;\n\n  if (useHalfFloat) {\n    map.type = THREE.HalfFloatType;\n    map.format = THREE.RGBFormat;\n    map.RGBM = false;\n    map.GammaEncoded = true;\n  } else\n\n  map.RGBM = true;\n\n  if (callback)\n  callback(map);\n}","//Used for egde topology rendering\n\nimport * as THREE from \"three\";\nimport edge_vert from './shaders/edge_vert.glsl';\nimport edge_frag from './shaders/edge_frag.glsl';\n\nexport var EdgeShader = {\n\n  uniforms: {\n    \"color\": { type: \"v4\", value: new THREE.Vector4(0, 0, 0, 0.3) },\n    \"cutplanes\": { type: \"v4v\", value: [] } },\n\n\n  vertexShader: edge_vert,\n  fragmentShader: edge_frag };","/**\n * NVIDIA FXAA 3.11 by TIMOTHY LOTTES\n * \"PC VERSION\" Quality, ported to WebGL\n * https://gist.githubusercontent.com/bkaradzic/6011431/raw/92a3737404c0e764fa554077b16e07a46442da51/Fxaa3_11.h\n */\n\nimport * as THREE from \"three\";\nimport fxaa_vert from './shaders/fxaa_vert.glsl';\nimport fxaa_frag from './shaders/fxaa_frag.glsl';\n\nexport var FXAAShader = {\n\n  uniforms: {\n\n    \"tDiffuse\": { type: \"t\", value: null },\n    \"uResolution\": { type: \"v2\", value: new THREE.Vector2(1 / 1024, 1 / 512) } },\n\n\n  vertexShader: fxaa_vert,\n  fragmentShader: fxaa_frag };","import * as THREE from \"three\";\nimport gaussian_vert from './shaders/gaussian_vert.glsl';\nimport gaussian_frag from './shaders/gaussian_frag.glsl';\n\nimport { ShaderPass } from './ShaderPass';\n\nvar GaussianShader = {\n  uniforms: {\n    tDiffuse: { type: \"t\", value: null },\n    uColor: { type: \"v4\", value: new THREE.Vector4(1.0, 1.0, 1.0, 1.0) } },\n\n\n  // defines: {\n  //     KERNEL_SCALE_H:  1.0 / 64.0,\n  //     KERNEL_SCALE_V:  1.0 / 64.0,\n  //     KERNEL_RADIUS: 7.0\n  // },\n\n  vertexShader: gaussian_vert,\n  fragmentShader: gaussian_frag };\n\n\nexport var GaussianPass = function GaussianPass(width, height, radius, scale, params) {\n\n  var _width = width;\n  var _height = height;\n  var _blurRadius = radius || 3.0;\n  var _pixelScale = scale || 1.0;\n  var _blurPassH, _blurPassV;\n  var _tmptarget;\n\n  var _params = {\n    hasAlpha: params.hasAlpha || false,\n    blending: params.blending || false,\n    flipUV: params.flipUV || false };\n\n\n  // PUBLIC FUNCTIONS\n\n  this.render = function (renderer, writeBuffer, readBuffer) {\n    _blurPassH.render(renderer, _tmptarget, readBuffer); // from readBuffer to intermediary tmp\n    _blurPassV.render(renderer, writeBuffer, _tmptarget); // tmp out to write\n  };\n\n  this.setSize = function (width, height) {\n    this.cleanup();\n\n    _width = width;\n    _height = height;\n\n    _tmptarget = new THREE.WebGLRenderTarget(width, height, {\n      minFilter: THREE.LinearFilter,\n      magFilter: THREE.LinearFilter,\n      format: params.format !== undefined ? params.format : THREE.RGBAFormat, // use RGBA by default\n      type: params.type !== undefined ? params.type : THREE.UnsignedByteType, // use Uint8 by default\n      stencilBuffer: false });\n\n    _tmptarget.generateMipmaps = false;\n\n    _blurPassH.material.defines.KERNEL_SCALE_H = _blurPassV.material.defines.KERNEL_SCALE_H = (_pixelScale / _width).toFixed(4);\n    _blurPassH.material.defines.KERNEL_SCALE_V = _blurPassV.material.defines.KERNEL_SCALE_V = (_pixelScale / _height).toFixed(4);\n    _blurPassH.material.needsUpdate = _blurPassV.material.needsUpdate = true;\n  };\n\n  this.cleanup = function () {\n    if (_tmptarget)\n    _tmptarget.dispose();\n  };\n\n  this.setColor = function (color) {\n    _blurPassV.material.uniforms.uColor.value.x = color.r;\n    _blurPassV.material.uniforms.uColor.value.y = color.g;\n    _blurPassV.material.uniforms.uColor.value.z = color.b;\n  };\n\n  this.setAlpha = function (alpha) {\n    _blurPassV.material.uniforms.uColor.value.w = alpha;\n  };\n\n  // INITIALIZATION\n\n  // init shader passes\n  _blurPassH = new ShaderPass(GaussianShader);\n  _blurPassV = new ShaderPass(GaussianShader);\n\n  // init target\n  this.setSize(width, height);\n\n  _blurPassH.material.blending = _blurPassV.material.blending = THREE.NoBlending;\n  _blurPassH.material.depthWrite = _blurPassV.material.depthWrite = false;\n  _blurPassH.material.depthTest = _blurPassV.material.depthTest = false;\n  _blurPassH.material.defines.HORIZONTAL = 1;\n\n  _blurPassH.material.defines.KERNEL_RADIUS = _blurPassV.material.defines.KERNEL_RADIUS = _blurRadius.toFixed(1);\n\n  if (_params.blending) {\n    _blurPassV.material.transparent = true;\n    _blurPassV.material.blending = THREE.NormalBlending;\n  }\n\n  if (_params.hasAlpha)\n  _blurPassH.material.defines.HAS_ALPHA = _blurPassV.material.defines.HAS_ALPHA = \"\";\n\n  if (_params.flipUV)\n  _blurPassH.material.defines.FLIP_UV = \"\";\n\n};","export var GroundFlags = {\n  GROUND_UNFINISHED: 0,\n  GROUND_FINISHED: 1,\n  GROUND_RENDERED: 2 };","import { ShaderPass } from './ShaderPass';\nimport { GaussianPass } from './GaussianPass';\nimport { BackgroundShader } from './BackgroundShader';\nimport screen_quad_uv_vert from './shaders/screen_quad_uv_vert.glsl';\nimport groundreflection_draw_frag from './shaders/groundreflection_draw_frag.glsl';\nimport { GroundFlags } from \"./GroundFlags\";\nimport * as THREE from \"three\";\n\n\n// var GroundReflectionCompShader = {\n//     uniforms: {\n//         tDiffuse: { type: \"t\", value: null },\n//         tBackground: { type: \"t\", value: null },\n//         uColor: { type: \"v4\", value: new THREE.Vector4(1.0, 1.0, 1.0, 1.0) }\n//     },\n//\n//     vertexShader: screen_quad_uv_vert,\n//     fragmentShader: groundreflection_comp_frag\n// };\n\nvar GroundReflectionDrawShader = {\n  uniforms: {\n    tDiffuse: { type: \"t\", value: null } },\n\n\n  vertexShader: screen_quad_uv_vert,\n  fragmentShader: groundreflection_draw_frag };\n\n\n\nexport var GroundReflection = function GroundReflection(renderer, width, height, params) {\n\n  var _renderer = renderer;\n  var _gl = _renderer.getContext();\n  var _width = width || 512;\n  var _height = height || 512;\n  var _gaussianPass, _drawPass;\n  var _groundPlane, _groundCenter;\n  var _reflCamera;\n  var _isGroundCulled = false;\n  var _clearColor = new THREE.Color(0, 0, 0);\n  var _clearPass,_useClearPass = false;\n  var _envMapBg = false;\n\n  this.inTarget = undefined;\n  this.outTarget = undefined;\n\n  var _needClear = true;\n\n  var _status = GroundFlags.GROUND_UNFINISHED;\n\n  // param defaults\n  var _params = {\n    color: new THREE.Color(1.0, 1.0, 1.0),\n    alpha: 0.3,\n    texScale: 0.5,\n    blurRadius: 2,\n    blurTexScale: 0.5,\n    fadeAngle: Math.PI / 18 };\n\n\n  // PRIVATE FUNCTIONS\n\n  var getReflectionMatrix = function getReflectionMatrix(plane) {\n    var N = plane.normal;\n    var C = plane.constant;\n    return new THREE.Matrix4().set(\n    1 - 2 * N.x * N.x, -2 * N.y * N.x, -2 * N.x * N.z, -2 * C * N.x,\n    -2 * N.x * N.y, 1 - 2 * N.y * N.y, -2 * N.y * N.z, -2 * C * N.y,\n    -2 * N.x * N.z, -2 * N.y * N.z, 1 - 2 * N.z * N.z, -2 * C * N.z,\n    0, 0, 0, 1);\n\n  };\n\n  // PUBLIC FUNCTIONS\n  // note: currently scale is not used\n  this.setTransform = function (center, upDir, scale) {\n    _groundCenter = center;\n    _groundPlane.normal = upDir;\n    _groundPlane.constant = -center.dot(upDir);\n  };\n\n  this.cleanup = function () {\n    if (_gaussianPass) _gaussianPass.cleanup();\n    if (this.inTarget) this.inTarget.dispose();\n    if (this.outTarget) this.outTarget.dispose();\n  };\n\n  this.setSize = function (width, height) {\n    _width = width;\n    _height = height;\n\n    this.cleanup();\n\n    // init targets\n\n    this.inTarget = new THREE.WebGLRenderTarget(\n    _width * _params.texScale,\n    _height * _params.texScale,\n    {\n      magFilter: THREE.LinearFilter,\n      minFilter: THREE.LinearFilter,\n      format: THREE.RGBAFormat,\n      stencilBuffer: false });\n\n\n    this.inTarget.generateMipmaps = false;\n\n    // outTarget is where we're rendering the ground reflection image (without anything else)\n    // and that we will merge with the regular rendering by putting it on a quad.\n    this.outTarget = new THREE.WebGLRenderTarget(\n    _width * _params.texScale,\n    _height * _params.texScale,\n    {\n      magFilter: THREE.LinearFilter,\n      minFilter: THREE.LinearFilter,\n      format: THREE.RGBAFormat,\n      stencilBuffer: false });\n\n\n    this.outTarget.generateMipmaps = false;\n\n    // init gaussian pass\n\n    if (!_gaussianPass)\n    _gaussianPass = new GaussianPass(\n    _width * _params.texScale * _params.blurTexScale,\n    _height * _params.texScale * _params.blurTexScale,\n    _params.blurRadius,\n    1.0, {\n      hasAlpha: true,\n      blending: true,\n      flipUV: true });else\n\n\n    _gaussianPass.setSize(\n    _width * _params.texScale * _params.blurTexScale,\n    _height * _params.texScale * _params.blurTexScale);\n  };\n\n  this.updateCamera = function (camera) {\n    // do not render if camera cannot see top of plane\n    var camTarget;\n    if (camera.isPerspective) {\n      // For perspective camera, see if camera location -> point on plane\n      // dotted with the plane's normal is positive. If so, camera is below\n      // plane and ground can be culled.\n      camTarget = _groundCenter.clone();\n    } else {\n      // For orthographic camera, see if camera direction (target - position) \n      // dotted with the plane's normal is positive. If so, camera is below\n      // plane and ground can be culled.\n      camTarget = camera.target.clone();\n    }\n    var camDir = camera.position.clone().sub(camTarget).normalize();\n    var camAngle = Math.PI / 2 - camDir.angleTo(_groundPlane.normal);\n    _isGroundCulled = camAngle < 0;\n\n    if (_isGroundCulled) return;\n\n    // fade out\n    if (_params.fadeAngle > 0) {\n      var fadeAmount = Math.min(_params.fadeAngle, camAngle) / _params.fadeAngle;\n      _gaussianPass.setAlpha(fadeAmount * _params.alpha);\n    }\n\n    // construct reflected camera\n    var reflMatrix = getReflectionMatrix(_groundPlane);\n    _reflCamera = camera.clone();\n    _reflCamera.applyMatrix(reflMatrix);\n    // MAGIC: scale negative Y and flip UV gives us correct result without messing with face winding\n    _reflCamera.projectionMatrix.elements[5] *= -1;\n    _reflCamera.matrixWorldNeedsUpdate = true;\n\n    // copy worldUpTransform\n    if (camera.worldUpTransform)\n    _reflCamera.worldUpTransform = camera.worldUpTransform.clone();else\n\n    _reflCamera.worldUpTransform = new THREE.Matrix4();\n  };\n\n  this.renderIntoReflection = function (scene) {\n    if (_isGroundCulled) return;\n    _renderer.render(scene, _reflCamera, this.inTarget);\n\n    // THREE.log(\"GR render in\");\n  };\n\n\n  this.prepareGroundReflection = function () {\n    var qScenes;\n    var qSceneCount = 0;\n    var qSceneIdx = 0;\n\n    var MAX_PROCESS_FRAMES = 100;\n    var maxScenesPerFrame = 0;\n\n    return function (groundShadow, viewerImpl, forceDraw, minScenesPerFrame, maxTime, ratio) {\n\n      var modelQueue = viewerImpl.modelQueue();\n\n      // if the ground reflection is finished, leave\n      if (_status !== GroundFlags.GROUND_UNFINISHED || modelQueue.isEmpty()) {\n        // this call did not render it, so make sure the rendered status is set to finished.\n        _status = GroundFlags.GROUND_FINISHED;\n        return maxTime;\n      }\n\n      // This will happen once the linear render list is replaced\n      // by the BVH.\n      if (qScenes != modelQueue.getGeomScenes())\n      _needClear = true;\n\n      // Get a separate set of scenes (render batches) for us to traverse. Everything gets traversed.\n      if (_needClear) {\n        _needClear = false;\n\n        // if it's not visible, don't bother\n        // TODO this should really be tested once when making command list - if culled, don't even\n        // do anything with reflection or with displaying ground plane.\n        this.updateCamera(viewerImpl.camera);\n        if (this.isGroundCulled()) {\n          _status = GroundFlags.GROUND_FINISHED;\n          return maxTime;\n        }\n\n        this.clear();\n\n        qScenes = modelQueue.getGeomScenes();\n        qSceneCount = qScenes.length;\n        qSceneIdx = 0;\n        if (minScenesPerFrame) {\n          maxScenesPerFrame = Math.max(Math.ceil(qSceneCount / MAX_PROCESS_FRAMES), minScenesPerFrame);\n        } else {\n          maxScenesPerFrame = qSceneCount;\n        }\n        _status = GroundFlags.GROUND_UNFINISHED;\n\n      } else if (_status !== GroundFlags.GROUND_UNFINISHED) {\n        // finished, or just finished rendering last frame, or not visible;\n        // set status to definitively finished.\n        _status = GroundFlags.GROUND_FINISHED;\n        return maxTime;\n      } else if (minScenesPerFrame === 0) {\n        // render rest of scene, time permitting\n        maxScenesPerFrame = qSceneCount;\n      }\n\n      // progressive draw into reflection\n      var startTime, budget;\n\n      if (maxTime) {\n        startTime = performance.now();\n        ratio = ratio === undefined ? 1.0 : ratio;\n        budget = ratio * maxTime;\n      }\n\n      // TODO this is a bug in the old system: we should really use the BVH iterator here,\n      // so that (a) it's draw with frustum culling (should be faster) and (b) transparency is\n      // done properly from back to front. Need to get system to work properly before undertaking\n      // this task.\n      var retval;\n      var i = 0;\n      while (i < maxScenesPerFrame && qSceneIdx < qSceneCount) {\n        // Note that we'll always render at least one batch here, regardless of time.\n        // Not sure this is necessary, but it does avoid something going bad that causes\n        // the timer to always fail and so get us caught in an infinite loop of calling\n        // this method again and again.\n        var qScene = qScenes[qSceneIdx++];\n\n        if (qScene) {\n          i++;\n          // passing forceVisible to WebGLRenderer.projectObject()\n          qScene.forceVisible = true;\n          // Note we render everything in the scene (render batch) to the ground plane,\n          // so we don't have to worry about frustum culling, etc. - just blast through.\n          this.renderIntoReflection(qScene);\n          qScene.forceVisible = false;\n\n          // check time, if used\n          if (maxTime) {\n            var timeElapsed = performance.now() - startTime;\n            // is time up and we're not done?\n            if (budget < timeElapsed && qSceneIdx < qSceneCount) {\n              // couldn't finish render in time\n              _status = GroundFlags.GROUND_UNFINISHED;\n              retval = maxTime - timeElapsed;\n              break;\n            }\n          }\n        }\n      }\n\n      // Did we finish? We only reach this path if the maxObj limit is reached.\n      if (qSceneIdx < qSceneCount) {\n        _status = GroundFlags.GROUND_UNFINISHED;\n        // return time left, or 1, meaning we're not done.\n        retval = maxTime ? maxTime - performance.now() + startTime : 1;\n      }\n\n      // Should we create an intermediate result for display?\n      // Yes, if we're done rendering (retval is undefined), or if we're forcing it\n      // because progressive rendering is on and this is the first tick's result.\n      if (retval === undefined || forceDraw) {\n        // We just finished, great, do the post-process\n        this.postprocess(viewerImpl.camera, viewerImpl.matman());\n\n        if (groundShadow && groundShadow.enabled) {\n          viewerImpl.renderGroundShadow(this.outTarget);\n        }\n\n        this.renderReflection(viewerImpl.camera, viewerImpl.renderer().getColorTarget());\n\n        // We give back a sign that it was *this* call that actually finished up.\n        if (retval === undefined)\n        _status = GroundFlags.GROUND_RENDERED;\n        return maxTime ? maxTime - performance.now() + startTime : 1;\n      } else {\n        return retval;\n      }\n\n    };\n  }();\n\n\n  // The way the reflection pass works is that we render the reflection\n  // and blur it, etc. and the result is in outTarget. This method then\n  // merges the color buffer and the reflection image by rendering the\n  // reflection image on a screen-fillinq quad (well, a triangle) and\n  // setting depth range so that the depth value is 0.999999+, i.e., at\n  // the back of the scene.\n  // This sort of merge draw means the color target can be left as-is,\n  // no ping-ponging need occur, the reflection is put right into it.\n  this.renderReflection = function (camera, target) {\n    if (_isGroundCulled) return;\n\n    // Shove the quad with the reflection image to the back of the color buffer.\n    // NOTE: depthRange does not appear to work on Chrome on Windows. See\n    // _drawPass.scene.position.z for further corrective measure.\n    // Also see https://jira.autodesk.com/browse/LMV-1262\n    _gl.depthRange(0.999999, 1);\n    _drawPass.render(_renderer, target, this.outTarget);\n    // restore default range\n    _gl.depthRange(0, 1);\n\n    // THREE.log(\"GR render out\");\n  };\n\n  this.toggleEnvMapBackground = function (value) {\n\n    _envMapBg = value;\n    _clearPass.uniforms.envMapBackground.value = value;\n  };\n\n  this.postprocess = function (camera) {\n    if (_isGroundCulled) return;\n\n    // clear outTarget with bg color\n    if (_useClearPass || _envMapBg) {\n\n      _clearPass.uniforms['uCamDir'].value = camera.worldUpTransform ? camera.getWorldDirection().clone().applyMatrix4(camera.worldUpTransform) : camera.getWorldDirection();\n      _clearPass.uniforms['uCamUp'].value = camera.worldUpTransform ? camera.up.clone().applyMatrix4(camera.worldUpTransform) : camera.up;\n      _clearPass.uniforms['uResolution'].value.set(_width, _height);\n      _clearPass.uniforms['uHalfFovTan'].value = Math.tan(THREE.Math.degToRad(camera.fov * 0.5));\n\n      _clearPass.render(_renderer, this.outTarget);\n      _renderer.clearTarget(this.outTarget, false, true, false);\n    } else\n    {\n      _renderer.setClearColor(_clearColor, 1.0);\n      _renderer.clearTarget(this.outTarget, true, true, false);\n    }\n\n    // blur inTarget with alpha blending over bg in outTarget\n    _gaussianPass.render(_renderer, this.outTarget, this.inTarget);\n\n    // THREE.log(\"GR postprocess\");\n  };\n\n  this.clear = function () {\n    // clear with bgColor otherwise there'll be outline problem\n    // using the cheaper flat clear color in this case\n    _renderer.setClearColor(_clearColor, 0);\n    _renderer.clearTarget(this.inTarget, true, true, false);\n    _renderer.clearBlend();\n\n    // THREE.log(\"GR clear\");\n  };\n\n  // params are normalized clamped THREE.Vector3\n  this.setClearColors = function (colorTop, colorBot, skipClearPass) {\n    if (!colorBot) {\n      _clearColor.copy(colorTop);\n      _useClearPass = false;\n    } else\n    {\n      _clearColor.setRGB(\n      0.5 * (colorTop.x + colorBot.x),\n      0.5 * (colorTop.y + colorBot.y),\n      0.5 * (colorTop.z + colorBot.z));\n\n      // same logic as RenderContext.setClearColors\n      _useClearPass =\n      !colorTop.equals(colorBot) && !skipClearPass;\n      //!av.isAndroidDevice() &&\n      //!av.isIOSDevice();\n    }\n\n    if (_useClearPass) {\n      _clearPass.uniforms.color1.value.copy(colorTop);\n      _clearPass.uniforms.color2.value.copy(colorBot);\n    }\n  };\n\n  this.setEnvRotation = function (rotation) {\n    _clearPass.material.envRotationSin = Math.sin(rotation);\n    _clearPass.material.envRotationCos = Math.cos(rotation);\n  };\n\n  this.isGroundCulled = function () {\n    return _isGroundCulled;\n  };\n\n  this.getStatus = function () {\n    return _status;\n  };\n\n  this.setDirty = function () {\n    _needClear = true;\n    _status = GroundFlags.GROUND_UNFINISHED;\n  };\n\n  this.setColor = function (color) {\n    _gaussianPass.setColor(_params.color);\n    _params.color.set(color);\n  };\n\n  this.setAlpha = function (alpha) {\n    _gaussianPass.setAlpha(_params.alpha);\n    _params.alpha = alpha;\n  };\n\n  // INITIALIZATION\n\n  if (params) {\n    for (var i in _params) {\n      _params[i] = params[i] !== undefined ? params[i] : _params[i];\n    }\n  }\n\n  // init passes\n\n  _drawPass = new ShaderPass(GroundReflectionDrawShader);\n  _drawPass.material.blending = THREE.NoBlending;\n  _drawPass.material.depthTest = true;\n  _drawPass.material.depthWrite = false;\n  // Put the screen-filling quad at the back of the view volume.\n  // This is slightly dangerous, it could go \"too far\", so we put it at\n  // -0.999999 to keep it from being on the razor's edge.\n  // See https://jira.autodesk.com/browse/LMV-1262\n  _drawPass.scene.position.z = -0.999999;\n\n  if (params.clearPass) {\n    _clearPass = params.clearPass;\n  } else {\n    _clearPass = new ShaderPass(BackgroundShader);\n    _clearPass.material.blending = THREE.NoBlending;\n    _clearPass.material.depthWrite = false;\n    _clearPass.material.depthTest = false;\n  }\n\n  // init targets\n  this.setSize(_width, _height);\n\n  _gaussianPass.setAlpha(_params.color);\n  _gaussianPass.setAlpha(_params.alpha);\n\n  // init plane\n\n  _groundPlane = new THREE.Plane(new THREE.Vector3(0, 1, 0), 0);\n  _groundCenter = new THREE.Vector3(0, 0, 0);\n\n};","import { createShaderMaterial } from './ShaderUtils';\nimport { ShaderPass } from './ShaderPass';\nimport groundshadow_depth_vert from './shaders/groundshadow_depth_vert.glsl';\nimport groundshadow_depth_frag from './shaders/groundshadow_depth_frag.glsl';\nimport screen_quad_uv_vert from './shaders/screen_quad_uv_vert.glsl';\nimport groundshadow_ao_frag from './shaders/groundshadow_ao_frag.glsl';\nimport groundshadow_blur_frag from './shaders/groundshadow_blur_frag.glsl';\nimport groundshadow_color_frag from './shaders/groundshadow_color_frag.glsl';\nimport { GroundFlags } from \"./GroundFlags\";\nimport * as THREE from \"three\";\n\nvar GroundDepthShader = {\n  uniforms: {\n    \"cutplanes\": { type: \"v4v\", value: [] } },\n\n\n  vertexShader: groundshadow_depth_vert,\n  fragmentShader: groundshadow_depth_frag };\n\n\nvar GroundShadowAOShader = {\n  uniforms: {\n    tDepth: { type: \"t\", value: null },\n    worldSize: { type: \"v3\", value: new THREE.Vector3(1, 1, 1) } },\n\n\n  defines: {},\n\n\n\n  vertexShader: screen_quad_uv_vert,\n  fragmentShader: groundshadow_ao_frag };\n\n\n\nvar GroundShadowBlurShader = {\n  uniforms: {\n    tDepth: { type: \"t\", value: null } },\n\n\n  defines: {\n    //     KERNEL_SCALE:  1.0 / 64.0,\n    //     KERNEL_RADIUS: 7.0\n    //      BOX : 1\n  },\n\n  vertexShader: screen_quad_uv_vert,\n  fragmentShader: groundshadow_blur_frag };\n\n\n\nvar GroundShadowColorShader = {\n  uniforms: {\n    tDepth: { type: \"t\", value: null },\n    uShadowColor: { type: \"v4\", value: new THREE.Vector4(0, 0, 0, 1) } },\n\n\n  vertexShader: screen_quad_uv_vert,\n  fragmentShader: groundshadow_color_frag };\n\n\n\n// create plane shape to render shadow on the ground. It is a quad located in the z=0.0 plane\n// with an xy-extent of [-0.5, -0.5].\nexport function createGroundShape(material) {\n\n  var planeGeo = new THREE.PlaneBufferGeometry(1, 1);\n\n  // invert orientation so that it finally faces upwards\n  if (planeGeo.attributes.index.array.reverse) {\n    planeGeo.attributes.index.array.reverse();\n  } else {\n    // IE11...\n    // in-place swapping\n    var tmp;\n    var arr = planeGeo.attributes.index.array;\n    var half = Math.floor(arr.length / 2);\n    for (var i = 0, len = arr.length; i < half; ++i) {\n      tmp = arr[i];\n      arr[i] = arr[len - 1 - i];\n      arr[len - 1 - i] = tmp;\n    }\n  }\n\n  var planeMesh = new THREE.Mesh(planeGeo, material);\n  return planeMesh;\n}\n\nvar m, from, bottomFaceCenter;\n\nexport function setGroundShapeTransform(mesh, center, size, worldUp, rightAxis) {\n\n  if (!m) m = new THREE.Matrix4();\n  if (!from) from = new THREE.Vector3();\n  if (!bottomFaceCenter) bottomFaceCenter = new THREE.Vector3();\n\n  // compute rotation\n  from.subVectors(center, worldUp);\n  m.lookAt(from, center, rightAxis);\n\n  // the ground shape quad center is the lower-face center of the bbox\n  bottomFaceCenter.copy(worldUp).multiplyScalar(-0.5 * size.y).add(center);\n\n  // plane transform\n  mesh.position.copy(bottomFaceCenter);\n  mesh.rotation.setFromRotationMatrix(m);\n  mesh.scale.set(size.z, size.x, size.y);\n}\n\nexport function GroundShadow(renderer, params) {\n\n  var _renderer = renderer;\n  var _camera;\n  var _scene;\n  var _planeMesh;\n  var _targetH, _targetV;\n  var _matDepth, _matColor;\n  var _blurPassH, _blurPassV, _aoPass;\n  var _debugBox;\n\n  var _bufferValid = false;\n\n  var USE_AO_PASS = false;\n\n  var _needClear = true;\n\n  var _status = GroundFlags.GROUND_FINISHED;\n\n  // param defaults\n  var _params = {\n    texSize: USE_AO_PASS ? 128.0 : 64.0,\n    pixScale: 1.0,\n    blurRadius: USE_AO_PASS ? 5.0 : 7.0,\n    debug: false };\n\n\n  // FUNCTIONS\n\n  /**\n   * Set transform of the ground shadow system\n   * @param {Vector3} center  center of bounding box\n   * @param {Vector3} size    size in look&up coordinates, look = y\n   * @param {Vector3} lookDir look direction, where ground camera is facing\n   * @param {Vector3} upDir   up direction for ground camera\n   */\n  this.setTransform = function () {\n    var prevCenter = new THREE.Vector3(0, 0, 0);\n    var prevSize = new THREE.Vector3(0, 0, 0);\n    var prevLookDir = new THREE.Vector3(0, 0, 0);\n    var prevUpDir = new THREE.Vector3(0, 0, 0);\n\n    return function (center, size, lookDir, upDir) {\n\n      // check if changed - if not, it saves us an entire ground shadow redraw!\n      if (center.equals(prevCenter) &&\n      size.equals(prevSize) &&\n      lookDir.equals(prevLookDir) &&\n      upDir.equals(prevUpDir)) {\n\n        return;\n      }\n\n      prevCenter.copy(center);\n      prevSize.copy(size);\n      prevLookDir.copy(lookDir);\n      prevUpDir.copy(upDir);\n\n      // something's changing, so need to regenerate ground shadow\n      this.setDirty();\n\n      // ortho frustrum\n      _camera.left = -size.z / 2.0;\n      _camera.right = size.z / 2.0;\n      _camera.top = size.x / 2.0;\n      _camera.bottom = -size.x / 2.0;\n      _camera.near = 1.0;\n      _camera.far = size.y + _camera.near;\n\n      // update projection\n      _camera.updateProjectionMatrix();\n\n      setGroundShapeTransform(_planeMesh, center, size, lookDir, upDir);\n\n      // camera transform\n      _camera.position.addVectors(center, lookDir.clone().multiplyScalar(-size.y / 2.0 - _camera.near));\n      if (upDir) _camera.up.set(upDir.x, upDir.y, upDir.z);\n      _camera.lookAt(center);\n\n      // debug box\n      if (_params.debug) {\n        _debugBox.position.set(center.x, center.y, center.z);\n        _debugBox.rotation.set(_camera.rotation.x, _camera.rotation.y, _camera.rotation.z);\n        _debugBox.scale.set(size.z, size.x, size.y);\n      }\n\n      _aoPass.uniforms['worldSize'].value.copy(size);\n    };\n  }();\n\n  this.renderIntoShadow = function (scene) {\n    //Skip ghosted objects\n    if (scene.overrideMaterial && scene.overrideMaterial.transparent)\n    return;\n\n    var oldMat = scene.overrideMaterial;\n    scene.overrideMaterial = _matDepth;\n    _renderer.render(scene, _camera, _targetH, false);\n    scene.overrideMaterial = oldMat;\n\n    // THREE.log(\"GS render in\");\n  };\n\n  // Generate ground shadow texture. Return GROUND code.\n  // The ground shadow generation has two modes:\n  // No argument means render the whole shadow until done\n  // else, argument means render the shadow until time is up.\n  // This second mode is mean for progressive rendering of small scenes;\n  // if during command creation we approximate that the whole shadow process\n  // will be done quickly enough, we try to render it fully in the allotted time.\n\n  // Arguments are:\n  //   modelQueue - what to render\n  //   maxTime - current budget left. Infinite, if not specified.\n  //   ratio - how much of this budget we get. 1.0 if not specified.\n  //   maxObjs - can also give a maximum number of objects.\n  // returns time left, if maxTime is specified; else just returns maxTime value (undefined).\n  this.prepareGroundShadow = function () {\n    var qScenes;\n    var qSceneCount = 0;\n    var qSceneIdx = 0;\n\n    var MAX_PROCESS_FRAMES = 100;\n    var maxScenesPerFrame = 0;\n\n    return function (modelQueue, minScenesPerFrame, maxTime, ratio) {\n\n      // if the ground shadow is off, don't continue\n      if (!this.enabled || modelQueue.isEmpty()) {\n        _status = GroundFlags.GROUND_FINISHED;\n        return maxTime;\n      }\n\n      // This will happen once the linear render list is replaced\n      // by the BVH.\n      if (qScenes != modelQueue.getGeomScenes())\n      _needClear = true;\n\n      // Get a separate set of scenes (render batches) for us to traverse. Everything gets traversed.\n      if (_needClear) {\n        this.clear();\n        _needClear = false;\n\n        qScenes = modelQueue.getGeomScenes();\n        qSceneCount = qScenes.length;\n        qSceneIdx = 0;\n        if (minScenesPerFrame) {\n          maxScenesPerFrame = Math.max(Math.ceil(qSceneCount / MAX_PROCESS_FRAMES), minScenesPerFrame);\n        } else {\n          maxScenesPerFrame = qSceneCount;\n        }\n      } else if (_status === GroundFlags.GROUND_RENDERED || _status === GroundFlags.GROUND_FINISHED) {\n        // If drop shadow is valid, we're done, no rendering needed.\n        // this call did not render it, so make sure the rendered status is set to finished.\n        _status = GroundFlags.GROUND_FINISHED;\n        return maxTime;\n      } else if (minScenesPerFrame === 0) {\n        // render rest of scene, time permitting\n        maxScenesPerFrame = qSceneCount;\n      }\n\n      // progressive draw into shadow\n      var startTime, budget;\n\n      if (maxTime) {\n        startTime = performance.now();\n        ratio = ratio === undefined ? 1.0 : ratio;\n        budget = ratio * maxTime;\n      }\n      var retval;\n      var i = 0;\n      while (i < maxScenesPerFrame && qSceneIdx < qSceneCount) {\n        // Note that we'll always render at least one batch here, regardless of time.\n        // Not sure this is necessary, but it does avoid something going bad that causes\n        // the timer to always fail and so get us caught in an infinite loop of calling\n        // this method again and again.\n        var qScene = qScenes[qSceneIdx++];\n\n        if (qScene) {\n          i++;\n          // passing forceVisible to WebGLRenderer.projectObject()\n          qScene.forceVisible = true;\n          // Note we render everything in the scene (render batch) to the ground plane,\n          // so we don't have to worry about frustum culling, etc. - just blast through.\n          this.renderIntoShadow(qScene);\n          qScene.forceVisible = false;\n\n          // check time, if used\n          if (maxTime) {\n            var timeElapsed = performance.now() - startTime;\n            // is time up and we're not done?\n            if (budget < timeElapsed) {\n              // couldn't finish render in time\n              _status = GroundFlags.GROUND_UNFINISHED;\n              retval = maxTime - timeElapsed;\n              break;\n            }\n          }\n        }\n      }\n      // Did we finish? We only reach this path if the maxObj limit is reached.\n      if (qSceneIdx < qSceneCount) {\n        _status = GroundFlags.GROUND_UNFINISHED;\n        // return time left, or 1, meaning we're not done.\n        retval = maxTime ? maxTime - performance.now() + startTime : 1;\n      }\n\n      if (retval !== undefined) {\n        // out of time, or done with object quota\n        return retval;\n      }\n\n      // We just finished, great, do the post-process\n      this.postprocess();\n\n      // We give back a sign that it was *this* call that actually finished up. By doing so,\n      // the calling method may (or may not) want to signal for an invalidate to occur,\n      // typically in a progressive rendering situation where a full redraw is then needed.\n      _status = GroundFlags.GROUND_RENDERED;\n      return maxTime ? maxTime - performance.now() + startTime : 1;\n    };\n  }();\n\n\n  this.renderShadow = function (camera, target) {\n    if (!_bufferValid)\n    return;\n\n    if (target)\n    _renderer.render(_scene, camera, target, false);else\n\n    _renderer.render(_scene, camera);\n\n    // THREE.log(\"GS render out\");\n  };\n\n  this.postprocess = function () {\n    if (USE_AO_PASS) {\n      _aoPass.render(_renderer, _targetV, _targetH);\n      _blurPassV.render(_renderer, _targetH, _targetV);\n      _blurPassH.render(_renderer, _targetV, _targetH);\n    } else {\n      _blurPassV.render(_renderer, _targetV, _targetH);\n      _blurPassH.render(_renderer, _targetH, _targetV);\n    }\n\n    _bufferValid = true;\n\n    // THREE.log(\"GS postprocess\");\n  };\n\n  this.clear = function () {\n    var oldClearColor = _renderer.getClearColor().getHex();\n    var oldClearAlpha = _renderer.getClearAlpha();\n    _renderer.setClearColor(0, 0);\n    _renderer.clearTarget(_targetH, true, true, false);\n    _renderer.setClearColor(oldClearColor, oldClearAlpha);\n    _renderer.clearBlend();\n    _bufferValid = false;\n\n    // THREE.log(\"GS clear\");\n  };\n\n  this.setColor = function (color) {\n    _matColor.uniforms.uShadowColor.value.x = color.r;\n    _matColor.uniforms.uShadowColor.value.y = color.g;\n    _matColor.uniforms.uShadowColor.value.z = color.b;\n  };\n\n  this.getColor = function () {\n    return new THREE.Color(\n    _matColor.uniforms.uShadowColor.value.x,\n    _matColor.uniforms.uShadowColor.value.y,\n    _matColor.uniforms.uShadowColor.value.z);\n\n  };\n\n  this.setAlpha = function (alpha) {\n    _matColor.uniforms.uShadowColor.value.w = alpha;\n  };\n\n  this.getAlpha = function () {\n    return _matColor.uniforms.uShadowColor.value.w;\n  };\n\n  // This means \"was the blur post-process done?\" not \"are we done rendering?\"\n  // Progressive rendering can make a partial valid drop shadow, but it's not done\n  this.isValid = function () {\n    return _bufferValid;\n  };\n\n  this.getStatus = function () {\n    return _status;\n  };\n\n  this.setDirty = function () {\n    _needClear = true;\n    _status = GroundFlags.GROUND_UNFINISHED;\n  };\n\n  // TODO_NOP: hack exposing groundshadow material\n  this.getDepthMaterial = function () {\n    return _matDepth;\n  };\n\n  // INITIALIZATION\n\n  if (params) {\n    for (var i in _params) {\n      _params[i] = params[i] || _params[i];\n    }\n  }\n\n  // init scene\n  _scene = new THREE.Scene();\n\n  // init camera\n  _camera = new THREE.OrthographicCamera();\n\n  // init targets\n\n  _targetH = new THREE.WebGLRenderTarget(_params.texSize, _params.texSize, {\n    minFilter: THREE.LinearFilter,\n    magFilter: THREE.LinearFilter,\n    format: THREE.RGBAFormat,\n    stencilBuffer: false });\n\n  _targetH.generateMipmaps = false;\n\n  _targetV = new THREE.WebGLRenderTarget(_params.texSize, _params.texSize, {\n    minFilter: THREE.LinearFilter,\n    magFilter: THREE.LinearFilter,\n    format: THREE.RGBAFormat,\n    stencilBuffer: false });\n\n  _targetV.generateMipmaps = false;\n\n\n  // init materials\n\n  _matDepth = createShaderMaterial(GroundDepthShader);\n  _matDepth.side = THREE.DoubleSide;\n  _matDepth.blending = THREE.NoBlending;\n\n  _blurPassH = new ShaderPass(GroundShadowBlurShader, \"tDepth\");\n  _blurPassV = new ShaderPass(GroundShadowBlurShader, \"tDepth\");\n  _aoPass = new ShaderPass(GroundShadowAOShader, \"tDepth\");\n\n  // write defines\n  _blurPassH.material.defines[\"KERNEL_SCALE\"] = _blurPassV.material.defines[\"KERNEL_SCALE\"] = (_params.pixScale / _params.texSize).toFixed(4);\n  _blurPassH.material.defines[\"KERNEL_RADIUS\"] = _blurPassV.material.defines[\"KERNEL_RADIUS\"] = _params.blurRadius.toFixed(2);\n\n  //Some standard GL setup for the blur passes.\n  _aoPass.material.blending = _blurPassH.material.blending = _blurPassV.material.blending = THREE.NoBlending;\n  _aoPass.material.depthWrite = _blurPassH.material.depthWrite = _blurPassV.material.depthWrite = false;\n  _aoPass.material.depthTest = _blurPassH.material.depthTest = _blurPassV.material.depthTest = false;\n  _blurPassH.material.defines[\"HORIZONTAL\"] = 1;\n\n  _matColor = createShaderMaterial(GroundShadowColorShader);\n  _matColor.uniforms.tDepth.value = USE_AO_PASS ? _targetV : _targetH;\n  _matColor.depthWrite = false;\n  _matColor.transparent = true;\n\n  // init plane\n  _planeMesh = createGroundShape(_matColor);\n  _scene.add(_planeMesh);\n\n  // init debug box\n  if (_params.debug) {\n    _debugBox = new THREE.Mesh(\n    new THREE.BoxGeometry(1, 1, 1),\n    new THREE.MeshBasicMaterial({ color: 0x00ff00, wireframe: true }));\n\n    _scene.add(_debugBox);\n  }\n\n  // init with default bounds and up\n  this.setTransform(\n  new THREE.Vector3(0, 0, 0),\n  new THREE.Vector3(1, 1, 1),\n  new THREE.Vector3(0, 1, 0),\n  THREE.Object3D.DefaultUp);\n\n}\n\nGroundShadow.prototype.constructor = GroundShadow;","var fbuf = new Float32Array(1);\nvar ibuf = new Uint32Array(fbuf.buffer);\nvar tmp = new Uint16Array(1);\nvar hp = new Uint16Array(1);\n\nexport var FloatToHalf = function FloatToHalf(f) {\n\n  fbuf[0] = f;\n  var x = ibuf[0];\n  var i = 0;\n\n  if ((x & 0x7FFFFFFF) === 0) {// Signed zero\n    hp[i++] = x >> 16; // Return the signed zero\n  } else {// Not zero\n    var xs = x & 0x80000000; // Pick off sign bit\n    var xe = x & 0x7F800000; // Pick off exponent bits\n    var xm = x & 0x007FFFFF; // Pick off mantissa bits\n    if (xe === 0) {// Denormal will underflow, return a signed zero\n      hp[i++] = xs >> 16;\n    } else if (xe == 0x7F800000) {// Inf or NaN (all the exponent bits are set)\n      if (xm === 0) {// If mantissa is zero ...\n        hp[i++] = xs >> 16 | 0x7C00; // Signed Inf\n      } else {\n        hp[i++] = 0xFE00; // NaN, only 1st mantissa bit set\n      }\n    } else {// Normalized number\n      var hm, he;\n      var hs = xs >> 16; // Sign bit\n      var hes = (0 | xe >> 23) - 127 + 15; // Exponent unbias the single, then bias the halfp\n      if (hes >= 0x1F) {// Overflow\n        hp[i++] = xs >> 16 | 0x7C00; // Signed Inf\n      } else if (hes <= 0) {// Underflow\n        if (14 - hes > 24) {// Mantissa shifted all the way off & no rounding possibility\n          hm = 0; // Set mantissa to zero\n        } else {\n          xm |= 0x00800000; // Add the hidden leading bit\n          hm = xm >> 14 - hes; // Mantissa\n          tmp[0] = hm;hm = tmp[0];\n\n          if (xm >> 13 - hes & 0x00000001) // Check for rounding\n            hm += 1; // Round, might overflow into exp bit, but this is OK\n        }\n        hp[i++] = hs | hm; // Combine sign bit and mantissa bits, biased exponent is zero\n      } else {\n        he = hes << 10; // Exponent\n        tmp[0] = he;he = tmp[0];\n\n        hm = xm >> 13; // Mantissa\n        tmp[0] = hm;hm = tmp[0];\n\n        if (xm & 0x00001000) // Check for rounding\n          hp[i++] = (hs | he | hm) + 1; // Round, might overflow to inf, this is OK\n        else\n          hp[i++] = hs | he | hm; // No rounding\n      }\n    }\n  }\n\n  return hp[0];\n};\n\n\nexport var HalfToFloat = function HalfToFloat(source)\n{\n  var target;\n\n  var h = source & 0xFFFF;\n  if ((h & 0x7FFF) === 0) {// Signed zero\n    target = h << 16; // Return the signed zero\n  } else {// Not zero\n    var hs = h & 0x8000; // Pick off sign bit\n    var he = h & 0x7C00; // Pick off exponent bits\n    var hm = h & 0x03FF; // Pick off mantissa bits\n    if (he === 0) {// Denormal will convert to normalized\n      var e = -1; // The following loop figures out how much extra to adjust the exponent\n      do {\n        e++;\n        hm <<= 1;\n      } while ((hm & 0x0400) === 0); // Shift until leading bit overflows into exponent bit\n      var xs = hs << 16; // Sign bit\n      var xes = (he << 16 >> 26) - 15 + 127 - e; // Exponent unbias the halfp, then bias the single\n      var xe = xes << 23; // Exponent\n      var xm = (hm & 0x03FF) << 13; // Mantissa\n      target = xs | xe | xm; // Combine sign bit, exponent bits, and mantissa bits\n    } else if (he == 0x7C00) {// Inf or NaN (all the exponent bits are set)\n      if (hm === 0) {// If mantissa is zero ...\n        target = hs << 16 | 0x7F800000; // Signed Inf\n      } else {\n        target = 0xFFC00000; // NaN, only 1st mantissa bit set\n      }\n    } else {// Normalized number\n      xs = hs << 16; // Sign bit\n      xes = (he << 16 >> 26) - 15 + 127; // Exponent unbias the halfp, then bias the single\n      xe = xes << 23; // Exponent\n      xm = hm << 13; // Mantissa\n      target = xs | xe | xm; // Combine sign bit, exponent bits, and mantissa bits\n    }\n  }\n\n  ibuf[0] = target;\n  return fbuf[0];\n};\n\nexport var HALF_INT_MAX = 58 * 1024 - 2;\n\nexport var IntToHalf = function IntToHalf(i) {\n\n  if (i > HALF_INT_MAX - 1 || i < 0) {\n    console.log(\"out of range\");\n    return FloatToHalf(NaN);\n  }\n\n  if (i === 0)\n  return 0;\n\n  var negate = false;\n  if (i > HALF_INT_MAX / 2 - 1) {\n    negate = true;\n    i -= HALF_INT_MAX / 2 - 1;\n  }\n\n  var bucket = Math.abs(i / 1024) | 0;\n  var base = Math.pow(2, bucket - 13);\n\n  var mapped = base + (i - bucket * 1024) * base / 1024;\n\n  if (negate)\n  mapped = -mapped;\n\n  return FloatToHalf(mapped);\n};\n\nexport var HalfToInt = function HalfToInt(half) {\n\n  if (half === 0)\n  return 0;\n\n  var f = HalfToFloat(half);\n\n  var negate = false;\n  if (f < 0) {\n    negate = true;\n    f = -f;\n  }\n\n  var bucket = 0 | Math.floor(Math.log(f) / Math.log(2));\n  var base = Math.pow(2, bucket);\n\n  var decoded = (f - base) / base * 1024 + (bucket + 13) * 1024;\n\n  if (negate)\n  decoded += HALF_INT_MAX / 2 - 1;\n\n  return decoded;\n};\n\nexport var HalfTest = function HalfTest() {\n\n  var tests = [-1 / 255, -0.17, -75, -1789, -0.005];\n\n  for (var i = 0; i < tests.length; i++) {\n\n    console.log(\"input\", tests[i], \"encoded\", FloatToHalf(tests[i]), \"decoded\", HalfToFloat(FloatToHalf(tests[i])));\n\n  }\n\n  for (var i = 0; i < HALF_INT_MAX; i++) {\n    var roundtrip = HalfToInt(IntToHalf(i));\n    if (roundtrip !== i) {\n      console.log(\"Roundtrip failed for\", i, roundtrip);\n    }\n  }\n\n};","import * as THREE from \"three\";\nimport line_vert from './shaders/line_vert.glsl';\nimport line_frag from './shaders/line_frag.glsl';\n\nimport { ShaderChunks as chunks } from \"./ShaderChunks.js\";\n\nexport var LineShader = {\n\n  uniforms: THREE.UniformsUtils.merge([\n\n  chunks.CutPlanesUniforms,\n  {\n    \"pixelsPerUnit\": { type: \"f\", value: 1.0 },\n    \"aaRange\": { type: \"f\", value: 0.5 }, //aaRange = 0.5/pixelsPerUnit\n    \"tLayerMask\": { type: \"t\", value: null },\n    \"tLineStyle\": { type: \"t\", value: null },\n    \"vLineStyleTexSize\": { type: \"v2\", value: new THREE.Vector2(13, 70) },\n    \"tRaster\": { type: \"t\", value: null },\n    \"tSelectionTexture\": { type: \"t\", value: null },\n    \"vSelTexSize\": { type: \"v2\", value: new THREE.Vector2(4096, 1) },\n    \"displayPixelRatio\": { type: \"f\", value: 1.0 },\n    \"opacity\": { type: \"f\", value: 1.0 },\n    \"selectionColor\": { type: \"v4\", value: new THREE.Vector4(0, 0, 1, 1) },\n    \"modelId\": { type: \"v3\", value: new THREE.Vector3(0, 0, 0) },\n    \"viewportId\": { type: \"f\", value: 0.0 }, // the viewport id of the first selection in measure\n    \"swap\": { type: \"f\", value: 0.0 }, // whether to swap black and white colors\n    \"grayscale\": { type: \"f\", value: 0.0 }, // whether to render all lines in a shade of gray\n    \"viewportBounds\": { type: \"v4\", value: new THREE.Vector4(0, 0, 1, 1) },\n    // objects in this layer are ghosted and non-selectable. This value must be consistent with the\n    // GhostingLayer constant in FragmentList.js\n    //\"ghostingLayer\":     { type: \"v2\", value: new THREE.Vector2(1,1) }\n\n    //This is handled as special case by the renderer, like all other camera matrices\n    //since it's shared between material instances\n    //\"mvpMatrix\" : {type: \"m4\", value: new THREE.Matrix4() }\n\n    //TODO: figure out how to make this cleaner\n    //Scale and offset applied to vertex positions.\n    //Used for getting back to page coordinates in case positions are compacted to uint16\n    \"unpackXform\": { type: \"v4\", value: new THREE.Vector4(1, 1, 0, 0), perObject: true },\n    //Texture containing color and dbId lookup tables\n    \"tIdColor\": { type: \"t\", value: null, perObject: true },\n    \"vIdColorTexSize\": { type: \"v2\", value: new THREE.Vector2(256, 1), perObject: true },\n    \"meshAnimTime\": { type: \"f\", value: 0.0, perObject: true } }]),\n\n\n\n  attributes: {\n    \"fields1\": 0,\n    \"fields2\": 0,\n    \"color4b\": 0,\n    \"dbId4b\": 0,\n    \"flags4b\": 0,\n    \"layerVp4b\": 0,\n    \"extraParams\": 0,\n    \"instFlags4b\": 0,\n    \"uvIdColor\": 0 },\n\n\n  defines: {\n    //\"MRT_ID_BUFFER\":      1,\n    //\"ID_COLOR\":           1,\n    //\"SELECTION_RENDERER\": 1,\n    //\"HAS_RASTER_QUADS\":   1,\n    //\"HAS_ELLIPTICALS\":    1,\n    //\"HAS_CIRCLES\":        1,\n    //\"HAS_TRIANGLE_GEOMS\": 1,\n    //\"USE_INSTANCING\":     1,\n    //\"UNPACK_POSITIONS\":   1,\n    //\"CONSTANT_COLOR\":     1,\n  },\n\n  vertexShader: line_vert,\n  fragmentShader: line_frag };","import * as THREE from \"three\";\nimport liness_vert from './shaders/liness_vert.glsl';\nimport liness_frag from './shaders/liness_frag.glsl';\n\nimport { ShaderChunks as chunks } from \"./ShaderChunks.js\";\n\n//A variant of the LineShader that renders screen aligned lines at all times\n//even for lines that are oriented in planes at oblique angles to the screen\n//e.g. when a line is renderd in a 3d model with perspective camera.\n\nexport var LineShaderSS = {\n\n  uniforms: THREE.UniformsUtils.merge([\n\n  chunks.CutPlanesUniforms,\n  {\n    \"pixelsPerUnit\": { type: \"f\", value: 1.0 },\n    \"aaRange\": { type: \"f\", value: 1.0 }, //aaRange = 0.5/pixelsPerUnit\n    \"tLayerMask\": { type: \"t\", value: null },\n    \"tLineStyle\": { type: \"t\", value: null },\n    \"vLineStyleTexSize\": { type: \"v2\", value: new THREE.Vector2(13, 70) },\n    \"tRaster\": { type: \"t\", value: null },\n    \"tSelectionTexture\": { type: \"t\", value: null },\n    \"vSelTexSize\": { type: \"v2\", value: new THREE.Vector2(4096, 1) },\n    \"displayPixelRatio\": { type: \"f\", value: 1.0 },\n    \"size\": { type: \"v2\", value: new THREE.Vector2(1024, 768) }, //the screen (or render target) size\n    \"opacity\": { type: \"f\", value: 1.0 },\n    \"selectionColor\": { type: \"v4\", value: new THREE.Vector4(0, 0, 1, 1) },\n    \"modelId\": { type: \"v3\", value: new THREE.Vector3(0, 0, 0) },\n    \"viewportId\": { type: \"f\", value: 0.0 }, // the viewport id of the first selection in measure\n    \"swap\": { type: \"f\", value: 0.0 }, // whether to swap black and white colors\n    \"grayscale\": { type: \"f\", value: 0.0 }, // whether to render all lines in a shade of gray\n    \"viewportBounds\": { type: \"v4\", value: new THREE.Vector4(0, 0, 1, 1) },\n    // objects in this layer are ghosted and non-selectable. This value must be consistent with the\n    // GhostingLayer constant in FragmentList.js\n    //\"ghostingLayer\":     { type: \"v2\", value: new THREE.Vector2(1,1) }\n\n    //This is handled as special case by the renderer, like all other camera matrices\n    //since it's shared between material instances\n    //\"mvpMatrix\" : {type: \"m4\", value: new THREE.Matrix4() }\n\n    //TODO: figure out how to make this cleaner\n    //Scale and offset applied to vertex positions.\n    //Used for getting back to page coordinates in case positions are compacted to uint16\n    \"unpackXform\": { type: \"v4\", value: new THREE.Vector4(1, 1, 0, 0), perObject: true },\n    //Texture containing color and dbId lookup tables\n    \"tIdColor\": { type: \"t\", value: null, perObject: true },\n    \"vIdColorTexSize\": { type: \"v2\", value: new THREE.Vector2(256, 1), perObject: true },\n    \"meshAnimTime\": { type: \"f\", value: 0.0, perObject: true } }]),\n\n\n\n  attributes: {\n    \"fields1\": 0,\n    \"fields2\": 0,\n    \"color4b\": 0,\n    \"dbId4b\": 0,\n    \"flags4b\": 0,\n    \"layerVp4b\": 0,\n    \"extraParams\": 0,\n    \"instFlags4b\": 0,\n    \"uvIdColor\": 0 },\n\n\n  defines: {\n    //\"MRT_ID_BUFFER\":      1,\n    //\"ID_COLOR\":           1,\n    //\"SELECTION_RENDERER\": 1,\n    //\"USE_INSTANCING\":     1,\n    //\"UNPACK_POSITIONS\":   1,\n    //\"CONSTANT_COLOR\":     1,\n  },\n\n  vertexShader: liness_vert,\n  fragmentShader: liness_frag };","import * as THREE from \"three\";\n\nexport var LineStyleDefs = [\n\n{\n  id: \"SOLID\",\n  name: \"Solid\",\n  ascii_art: \"_______________________________________\",\n  def: [1] },\n\n\n//Line types from acad.lin below. Definitions are kept the same\n//as the original except the format is JSON-ified to avoid parsing .LIN\n\n//\n//  AutoCAD Linetype Definition file\n//  Version 2.0\n//  Copyright 1991, 1992, 1993, 1994, 1996 by Autodesk, Inc.\n//\n\n//List of line type definitions from ACAD.lin.\n\n//[TS] The units for these items seem to be inches or drawing units with dot\n// being represented by 0, i.e. pen width = 0. (see note about ISO patterns below)\n\n{\n  id: \"BORDER\",\n  name: \"Border\",\n  ascii_art: \"__ __ . __ __ . __ __ . __ __ . __ __ .\",\n  def: [.5, -.25, .5, -.25, 0, -.25] },\n\n{\n  id: \"BORDER2\",\n  name: \"Border (.5x)\",\n  ascii_art: \"__ __ . __ __ . __ __ . __ __ . __ __ .\",\n  def: [.25, -.125, .25, -.125, 0, -.125] },\n\n{\n  id: \"BORDERX2\",\n  name: \"Border (2x)\",\n  ascii_art: \"____  ____  .  ____  ____  .  ___\",\n  def: [1.0, -.5, 1.0, -.5, 0, -.5] },\n\n\n\n{\n  id: \"CENTER\",\n  name: \"Center\",\n  ascii_art: \"____ _ ____ _ ____ _ ____ _ ____ _ ____\",\n  def: [1.25, -.25, .25, -.25] },\n\n{\n  id: \"CENTER2\",\n  name: \"Center (.5x)\",\n  ascii_art: \"___ _ ___ _ ___ _ ___ _ ___ _ ___\",\n  def: [.75, -.125, .125, -.125] },\n\n{\n  id: \"CENTERX2\",\n  name: \"Center (2x)\",\n  ascii_art: \"________  __  ________  __  _____\",\n  def: [2.5, -.5, .5, -.5] },\n\n\n{\n  id: \"DASHDOT\",\n  name: \"Dash dot\",\n  ascii_art: \"__ . __ . __ . __ . __ . __ . __ . __\",\n  def: [.5, -.25, 0, -.25] },\n\n{\n  id: \"DASHDOT2\",\n  name: \"Dash dot (.5x)\",\n  ascii_art: \"_._._._._._._._._._._._._._._.\",\n  def: [.25, -.125, 0, -.125] },\n\n{\n  id: \"DASHDOTX2\",\n  name: \"Dash dot (2x)\",\n  ascii_art: \"____  .  ____  .  ____  .  ___\",\n  def: [1.0, -.5, 0, -.5] },\n\n\n{\n  id: \"DASHED\",\n  name: \"Dashed\",\n  ascii_art: \"__ __ __ __ __ __ __ __ __ __ __ __ __ _\",\n  def: [.5, -.25] },\n\n{\n  id: \"DASHED2\",\n  name: \"Dashed (.5x)\",\n  ascii_art: \"_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _\",\n  def: [.25, -.125] },\n\n{\n  id: \"DASHEDX2\",\n  name: \"Dashed (2x)\",\n  ascii_art: \"____  ____  ____  ____  ____  ___\",\n  def: [1.0, -.5] },\n\n\n{\n  id: \"DIVIDE\",\n  name: \"Divide\",\n  ascii_art: \"____ . . ____ . . ____ . . ____ . . ____\",\n  def: [.5, -.25, 0, -.25, 0, -.25] },\n\n{\n  id: \"DIVIDE2\",\n  name: \"Divide (.5x)\",\n  ascii_art: \"__..__..__..__..__..__..__..__.._\",\n  def: [.25, -.125, 0, -.125, 0, -.125] },\n\n{\n  id: \"DIVIDEX2\",\n  name: \"Divide (2x)\",\n  ascii_art: \"________  .  .  ________  .  .  _\",\n  def: [1.0, -.5, 0, -.5, 0, -.5] },\n\n\n{\n  id: \"DOT\",\n  name: \"Dot\",\n  ascii_art: \". . . . . . . . . . . . . . . . . . . . . . . .\",\n  def: [0, -.25] },\n\n{\n  id: \"DOT2\",\n  name: \"Dot (.5x)\",\n  ascii_art: \"........................................\",\n  def: [0, -.125] },\n\n{\n  id: \"DOTX2\",\n  name: \"Dot (2x)\",\n  ascii_art: \".  .  .  .  .  .  .  .  .  .  .  .  .  .\",\n  def: [0, -.5] },\n\n\n{\n  id: \"HIDDEN\",\n  name: \"Hidden\",\n  ascii_art: \"__ __ __ __ __ __ __ __ __ __ __ __ __ __\",\n  def: [.25, -.125] },\n\n{\n  id: \"HIDDEN2\",\n  name: \"Hidden (.5x)\",\n  ascii_art: \"_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _\",\n  def: [.125, -.0625] },\n\n{\n  id: \"HIDDENX2\",\n  name: \"Hidden (2x)\",\n  ascii_art: \"____ ____ ____ ____ ____ ____ ____\",\n  def: [.5, -.25] },\n\n\n{\n  id: \"PHANTOM\",\n  name: \"Phantom\",\n  ascii_art: \"______  __  __  ______  __  __  ______\",\n  def: [1.25, -.25, .25, -.25, .25, -.25] },\n\n\n{\n  id: \"PHANTOM2\",\n  name: \"Phantom (.5x)\",\n  ascii_art: \"___ _ _ ___ _ _ ___ _ _ ___ _ _\",\n  def: [.625, -.125, .125, -.125, .125, -.125] },\n\n\n{\n  id: \"PHANTOMX2\",\n  name: \"Phantom (2x)\",\n  ascii_art: \"____________    ____    ____   _\",\n  def: [2.5, -.5, .5, -.5, .5, -.5] },\n\n\n//\n//  ISO 128 (ISO/DIS 12011) linetypes\n//\n//  The size of the line segments for each defined ISO line, is\n//  defined for an usage with a pen width of 1 mm. To use them with\n//  the other ISO predefined pen widths, the line has to be scaled\n//  with the appropriate value (e.g. pen width 0,5 mm -> ltscale 0.5).\n//\n\n//[TS] Added pen_width and unit properties to make this explicit\n\n{\n  id: \"ACAD_ISO02W100\",\n  name: \"ISO dash\",\n  ascii_art: \"__ __ __ __ __ __ __ __ __ __ __ __ __\",\n  def: [12, -3],\n\n  pen_width: 1,\n  unit: \"mm\" },\n\n\n{\n  id: \"ACAD_ISO03W100\",\n  name: \"ISO dash space\",\n  ascii_art: \"__    __    __    __    __    __\",\n  def: [12, -18],\n\n  pen_width: 1,\n  unit: \"mm\" },\n\n\n{\n  id: \"ACAD_ISO04W100\",\n  name: \"ISO long-dash dot\",\n  ascii_art: \"____ . ____ . ____ . ____ . _\",\n  def: [24, -3, .5, -3],\n\n  pen_width: 1,\n  unit: \"mm\" },\n\n\n{\n  id: \"ACAD_ISO05W100\",\n  name: \"ISO long-dash double-dot\",\n  ascii_art: \"____ .. ____ .. ____ .\",\n  def: [24, -3, .5, -3, .5, -3],\n\n  pen_width: 1,\n  unit: \"mm\" },\n\n\n{\n  id: \"ACAD_ISO06W100\",\n  name: \"ISO long-dash triple-dot\",\n  ascii_art: \"____ ... ____ ... ____\",\n  def: [24, -3, .5, -3, .5, -3, .5, -3],\n\n  pen_width: 1,\n  unit: \"mm\" },\n\n\n{\n  id: \"ACAD_ISO07W100\",\n  name: \"ISO dot\",\n  ascii_art: \". . . . . . . . . . . . . . . . . . . .\",\n  def: [.5, -3],\n\n  pen_width: 1,\n  unit: \"mm\" },\n\n\n{\n  id: \"ACAD_ISO08W100\",\n  name: \"ISO long-dash short-dash\",\n  ascii_art: \"____ __ ____ __ ____ _\",\n  def: [24, -3, 6, -3],\n\n  pen_width: 1,\n  unit: \"mm\" },\n\n\n{\n  id: \"ACAD_ISO09W100\",\n  name: \"ISO long-dash double-short-dash\",\n  ascii_art: \"____ __ __ ____\",\n  def: [24, -3, 6, -3, 6, -3],\n\n  pen_width: 1,\n  unit: \"mm\" },\n\n{\n  id: \"ACAD_ISO10W100\",\n  name: \"ISO dash dot\",\n  ascii_art: \"__ . __ . __ . __ . __ . __ . __ . \",\n  def: [12, -3, .5, -3],\n\n  pen_width: 1,\n  unit: \"mm\" },\n\n\n{\n  id: \"ACAD_ISO11W100\",\n  name: \"ISO double-dash dot\",\n  ascii_art: \"__ __ . __ __ . __ __ . __ _\",\n  def: [12, -3, 12, -3, .5, -3],\n\n  pen_width: 1,\n  unit: \"mm\" },\n\n{\n  id: \"ACAD_ISO12W100\",\n  name: \"ISO dash double-dot\",\n  ascii_art: \"__ . . __ . . __ . . __ . .\",\n  def: [12, -3, .5, -3, .5, -3],\n\n  pen_width: 1,\n  unit: \"mm\" },\n\n{\n  id: \"ACAD_ISO13W100\",\n  name: \"ISO double-dash double-dot\",\n  ascii_art: \"__ __ . . __ __ . . _\",\n  def: [12, -3, 12, -3, .5, -3, .5, -3],\n\n  pen_width: 1,\n  unit: \"mm\" },\n\n\n{\n  id: \"ACAD_ISO14W100\",\n  name: \"ISO dash triple-dot\",\n  ascii_art: \"__ . . . __ . . . __ . . . _\",\n  def: [12, -3, .5, -3, .5, -3, .5, -3],\n\n  pen_width: 1,\n  unit: \"mm\" },\n\n\n{\n  id: \"ACAD_ISO15W100\",\n  name: \"ISO double-dash triple-dot\",\n  ascii_art: \"__ __ . . . __ __ . .\",\n  def: [12, -3, 12, -3, .5, -3, .5, -3, .5, -3],\n\n  pen_width: 1,\n  unit: \"mm\" },\n\n\n//  Complex linetypes\n//\n//  Complex linetypes have been added to this file.\n//  These linetypes were defined in LTYPESHP.LIN in\n//  Release 13, and are incorporated in ACAD.LIN in\n//  Release 14.\n//  \n//  These linetype definitions use LTYPESHP.SHX.\n//\n\n//[TS] These do not work, we can only render linear types.\n\n{\n  id: \"FENCELINE1\",\n  name: \"Fenceline circle\",\n  ascii_art: \"----0-----0----0-----0----0-----0--\",\n  def: [.25, -.1, [\"CIRC1\", \"ltypeshp.shx\", \"x=-.1\", \"s=.1\"], -.1, 1] //TODO: Does not work\n},\n\n{\n  id: \"FENCELINE2\",\n  name: \"Fenceline square\",\n  ascii_art: \"----[]-----[]----[]-----[]----[]---\",\n  def: [.25, -.1, [\"BOX\", \"ltypeshp.shx\", \"x=-.1\", \"s=.1\"], -.1, 1] //TODO: Does not work\n},\n\n{\n  id: \"TRACKS\",\n  name: \"Tracks\",\n  ascii_art: \"-|-|-|-|-|-|-|-|-|-|-|-|-|-|-|-|-|-|-|-|-|-|-|-|-\",\n  def: [.15, [\"TRACK1\", \"ltypeshp.shx\", \"s=.25\"], .15] //TODO: Does not work\n},\n\n{\n  id: \"BATTING\",\n  name: \"Batting\",\n  ascii_art: \"SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS\",\n  def: [.0001, -.1, [\"BAT\", \"ltypeshp.shx\", \"x=-.1\", \"s=.1\"], -.2, [\"BAT\", \"ltypeshp.shx\", \"r=180\", \"x=.1\", \"s=.1\"], -.1] //TODO: Does not work\n},\n\n{\n  id: \"HOT_WATER_SUPPLY\",\n  name: \"Hot water supply\",\n  ascii_art: \"---- HW ---- HW ---- HW ----\",\n  def: [.5, -.2, [\"HW\", \"STANDARD\", \"S=.1\", \"R=0.0\", \"X=-0.1\", \"Y=-.05\"], -.2] //TODO: Does not work\n},\n\n{\n  id: \"GAS_LINE\",\n  name: \"Gas line\",\n  ascii_art: \"----GAS----GAS----GAS----GAS----GAS----GAS--\",\n  def: [.5, -.2, [\"GAS\", \"STANDARD\", \"S=.1\", \"R=0.0\", \"X=-0.1\", \"Y=-.05\"], -.25] //TODO: Does not work\n},\n\n\n{\n  id: \"ZIGZAG\",\n  name: \"Zig zag\",\n  ascii_art: \"/\\\\/\\\\/\\\\/\\\\/\\\\/\\\\/\\\\/\\\\/\\\\/\\\\/\\\\/\\\\/\\\\/\\\\/\\\\/\\\\/\\\\/\\\\/\\\\/\\\\/\\\\/\\\\/\\\\/\",\n  def: [.0001, -.2, [\"ZIG\", \"ltypeshp.shx\", \"x=-.2\", \"s=.2\"], -.4, [\"ZIG\", \"ltypeshp.shx\", \"r=180\", \"x=.2\", \"s=.2\"], -.2] //TODO: Does not work\n}];\n\n\n\n\nexport var createLinePatternTextureData = function createLinePatternTextureData(w, h) {\n  var pw = w + 3;\n  var ph = h;\n\n  var pot = 1;\n  while (pot < pw) {\n    pot *= 2;}\n  pw = pot;\n\n  pot = 1;\n  while (pot < ph) {\n    pot *= 2;}\n  ph = pot;\n\n  var tex = new Uint8Array(pw * ph);\n\n  var lineStyleTex = new THREE.DataTexture(tex, pw, ph,\n  THREE.LuminanceFormat,\n  THREE.UnsignedByteType,\n  THREE.UVMapping,\n  THREE.ClampToEdgeWrapping, THREE.ClampToEdgeWrapping,\n  THREE.NearestFilter, THREE.NearestFilter, 0);\n\n  lineStyleTex.generateMipmaps = false;\n  lineStyleTex.flipY = false;\n  lineStyleTex.needsUpdate = true;\n\n  return {\n    tex: tex,\n    pw: pw,\n    ph: ph,\n    lineStyleTex: lineStyleTex };\n\n};\n\n\nexport var createLinePatternTextureFromDefs = function createLinePatternTextureFromDefs(defs) {\n\n  var h = defs.length;\n  var w = 0;\n\n  for (var i = 0; i < h; i++) {\n    var ls = defs[i];\n\n    if (ls.def.length > w)\n    w = ls.def.length;\n  }var _createLinePatternTex =\n\n  createLinePatternTextureData(w, h),tex = _createLinePatternTex.tex,pw = _createLinePatternTex.pw,lineStyleTex = _createLinePatternTex.lineStyleTex;\n\n  for (var j = 0; j < h; j++) {\n    var _ls = defs[j];\n    createLinePatternForDef(_ls, tex, j, pw);\n  }\n\n  return lineStyleTex;\n};\n\nexport var createLinePatternTexture = function createLinePatternTexture() {\n  return createLinePatternTextureFromDefs(LineStyleDefs);\n};\n\nexport var createLinePatternForDef = function createLinePatternForDef(ls, tex, j, pw) {var dpi = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : 96;\n  var off = j * pw;\n\n  //NOTE: The pattern scaling here just makes\n  //the definitions in the texture consistent throughout in units of logical pixels (96 pixels per inch).\n  //It does not apply scaling based on pen width or LTSCALE which should be done in shader.\n  //Because we use a Byte texture, the maximum dash length at 96 dpi is about 2.5 inches, which\n  //is enough for the patterns we have today. This can be easily fixed by changing to e.g. rgba8\n\n  var unitScale = ls.unit && ls.unit == \"mm\" ? 1.0 / 25.4 : 1.0;\n  var penWidth = ls.pen_width || 0;\n\n  var segs = ls.def;\n  var patLen = 0;\n  for (var i = 0; i < segs.length; i++) {\n\n    var len = Math.abs(segs[i]);\n\n    var isDot = len <= penWidth * 0.5;\n    //Is it a dot? (the ISO patterns define dot as segment with half a pen width)\n    if (isDot)\n    len = 0;\n\n    var ilen = 0 | len * dpi * unitScale;\n\n    patLen += ilen;\n\n    //dot handling, set to 1 logical pixel in texture, since we need the 0 to indicate pattern end\n    //the shader will interpret 1 as dot.\n    tex[off + i + 2] = ilen ? ilen : 1;\n  }\n\n  //Two bytes to store total pattern length in the first two bytes of the texture row\n  tex[off] = patLen % 256;\n  tex[off + 1] = patLen / 256;\n\n  //null terminate the pattern def in the texture so we know when to stop in the shader\n  tex[off + segs.length + 2] = 0;\n};","function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {try {var info = gen[key](arg);var value = info.value;} catch (error) {reject(error);return;}if (info.done) {resolve(value);} else {Promise.resolve(value).then(_next, _throw);}}function _asyncToGenerator(fn) {return function () {var self = this,args = arguments;return new Promise(function (resolve, reject) {var gen = fn.apply(self, args);function _next(value) {asyncGeneratorStep(gen, resolve, reject, _next, _throw, \"next\", value);}function _throw(err) {asyncGeneratorStep(gen, resolve, reject, _next, _throw, \"throw\", err);}_next(undefined);});};}\nimport * as THREE from \"three\";\nimport { parseMaterialColor, parseMaterialScalar, parseMaterialBoolean, Get2DSimpleMapTransform } from \"./MaterialConverterCommon\";\n\nvar av = Autodesk.Viewing;\n\nexport var MaterialConverter = {\n  convertMaterial: convertMaterial,\n  convertTexture: convertTexture,\n  isPrismMaterial: isPrismMaterial,\n  convertMaterialGltf: convertMaterialGltf,\n  applyAppearanceHeuristics: applyAppearanceHeuristics,\n  applyGeometryFlagsToMaterial: applyGeometryFlagsToMaterial,\n  hasTiling: hasTiling,\n  loadMaterialConverterPrismLibrary: loadMaterialConverterPrismLibrary };\n\n\nfunction hasTiling(material) {\n  var innerMats = material['materials'];\n  var innerMat = innerMats[material['userassets'][0]];\n  if (innerMat) {\n    var definition = innerMat['definition'];\n    if (definition === 'TilingPattern') {\n      return true;\n    }\n  }\n  return false;\n}function\n\nloadMaterialConverterPrismLibrary() {return _loadMaterialConverterPrismLibrary.apply(this, arguments);}function _loadMaterialConverterPrismLibrary() {_loadMaterialConverterPrismLibrary = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee() {var func;return regeneratorRuntime.wrap(function _callee$(_context) {while (1) {switch (_context.prev = _context.next) {case 0:if (\n\n\n            av.MaterialConverterPrism && av.MaterialConverterPrism.convertPrismMaterial) {_context.next = 3;break;}_context.next = 3;return (\n              av.theExtensionManager.downloadExtension('Autodesk.Viewing.MaterialConverterPrism'));case 3:\n\n\n            // Re-export those functions in MaterialConverter\n            if (!MaterialConverter.convertPrismMaterial) {\n              for (func in av.MaterialConverterPrism) {\n                MaterialConverter[func] = av.MaterialConverterPrism[func];\n              }\n            }case 4:case \"end\":return _context.stop();}}}, _callee);}));return _loadMaterialConverterPrismLibrary.apply(this, arguments);}function\n\n\nconvertMaterial(_x, _x2, _x3, _x4) {return _convertMaterial.apply(this, arguments);}function _convertMaterial() {_convertMaterial = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee2(matObj, sceneUnit, tm, index) {var isPrism, innerMats, innerMat, props, map, texProps, baked_lighting, a, d, s, e, isNormal, scale, isMetal, backfaceCulling, textures, texType;return regeneratorRuntime.wrap(function _callee2$(_context2) {while (1) {switch (_context2.prev = _context2.next) {case 0:\n\n            isPrism = isPrismMaterial(matObj);if (!\n\n            isPrism) {_context2.next = 7;break;}_context2.next = 4;return (\n\n              loadMaterialConverterPrismLibrary());case 4:\n\n            tm = MaterialConverter.convertPrismMaterial(matObj, sceneUnit, tm, index);\n\n            //Add the transparent flag as a top level property of the\n            //Protein JSON. This is currently how the BVH builder decides\n            //whether an object is transparent. See also Package.addTransparencyFlagsToMaterials\n            //which is an equivalent hack done on the web worker side.\n            //Normally the BVH will be built on the worker side, so this property set here is\n            //probably not needed.\n            matObj.transparent = tm.transparent;return _context2.abrupt(\"return\",\n            tm);case 7:\n\n\n            index = index || matObj[\"userassets\"];\n            innerMats = matObj[\"materials\"];\n            innerMat = innerMats[index];\n\n            props = innerMat[\"properties\"];if (\n\n            tm) {_context2.next = 15;break;}\n            tm = new THREE.MeshPhongMaterial();_context2.next = 20;break;case 15:if (\n            tm instanceof THREE.MeshPhongMaterial) {_context2.next = 19;break;}return _context2.abrupt(\"return\",\n            null);case 19:\n\n            tm.needsUpdate = true;case 20:\n\n\n\n            tm.proteinMat = matObj;\n            tm.proteinCategories = innerMat.categories;\n            tm.packedNormals = true;if (!(\n\n            innerMat && innerMat[\"definition\"] === \"SimplePhong\")) {_context2.next = 86;break;}\n\n            tm.tag = innerMat[\"tag\"];\n            tm.proteinType = innerMat[\"proteinType\"];\n            if (tm.proteinType === undefined)\n            tm.proteinType = null;\n\n            baked_lighting = parseMaterialBoolean(props, \"generic_baked_lighting\", false);\n            tm.disableEnvMap = baked_lighting;\n\n            a = tm.ambient = parseMaterialColor(props, \"generic_ambient\");\n            d = tm.color = parseMaterialColor(props, \"generic_diffuse\");\n            s = tm.specular = parseMaterialColor(props, \"generic_specular\");\n            e = tm.emissive = parseMaterialColor(props, \"generic_emissive\");\n\n            tm.shininess = parseMaterialScalar(props, \"generic_glossiness\", 30);\n            tm.opacity = 1.0 - parseMaterialScalar(props, \"generic_transparency\", 0);\n            tm.reflectivity = parseMaterialScalar(props, \"generic_reflectivity_at_0deg\", 0);\n\n            isNormal = parseMaterialBoolean(props, \"generic_bump_is_normal\");\n            scale = parseMaterialScalar(props, \"generic_bump_amount\", 0);\n\n            // If cannot read the scale, set the scale to 1 which is the default value for prism and protein.\n            if (scale == null)\n            scale = 1;\n\n            if (isNormal) {\n              if (scale > 1)\n              scale = 1;\n              tm.normalScale = new THREE.Vector2(scale, scale);\n            } else\n            {\n              if (scale >= 1.0)\n              scale = 0.03;\n              tm.bumpScale = scale;\n            }\n\n            isMetal = parseMaterialBoolean(props, \"generic_is_metal\");\n            if (isMetal !== undefined)\n            tm.metal = isMetal;\n\n            backfaceCulling = parseMaterialBoolean(props, \"generic_backface_cull\");\n            if (backfaceCulling !== undefined && !backfaceCulling)\n            tm.side = THREE.DoubleSide;\n\n            tm.transparent = innerMat[\"transparent\"];\n\n            tm.textureMaps = {};\n            textures = innerMat[\"textures\"];_context2.t0 = regeneratorRuntime.keys(\n            textures);case 48:if ((_context2.t1 = _context2.t0()).done) {_context2.next = 81;break;}texType = _context2.t1.value;\n\n            map = {};\n\n            map.textureObj = innerMats[textures[texType][\"connections\"][0]];\n            texProps = map.textureObj[\"properties\"];\n            map.textureObj.matrix = get2DMapTransform(map.textureObj, false, sceneUnit);\n\n            // Grab URI\n            //The uriPointer is used for transforming texture paths in material rewrite workflows\n            map.uriPointer = texProps[\"uris\"][\"unifiedbitmap_Bitmap\"][\"values\"];\n            map.uri = map.uriPointer[0];if (\n            map.uri) {_context2.next = 58;break;}return _context2.abrupt(\"continue\", 48);case 58:if (!(\n\n\n\n\n            texType == \"generic_diffuse\")) {_context2.next = 63;break;}\n            map.mapName = \"map\";\n\n            if (!tm.color || tm.color.r === 0 && tm.color.g === 0 && tm.color.b === 0)\n            tm.color.setRGB(1, 1, 1);_context2.next = 78;break;case 63:if (!(\n\n            texType == \"generic_bump\")) {_context2.next = 67;break;}\n            if (isNormal)\n            map.mapName = \"normalMap\";else\n\n            map.mapName = \"bumpMap\";_context2.next = 78;break;case 67:if (!(\n\n            texType == \"generic_specular\")) {_context2.next = 71;break;}\n            map.mapName = \"specularMap\";_context2.next = 78;break;case 71:if (!(\n\n            texType == \"generic_alpha\")) {_context2.next = 77;break;}\n            map.mapName = \"alphaMap\";\n            tm.side = THREE.DoubleSide;\n            tm.transparent = true;_context2.next = 78;break;case 77:return _context2.abrupt(\"continue\", 48);case 78:\n\n\n\n\n\n\n\n\n\n\n            tm.textureMaps[map.mapName] = map;_context2.next = 48;break;case 81:\n\n\n            //If the material is completely black, use a default material.\n            if (d.r === 0 && d.g === 0 && d.b === 0 &&\n            s.r === 0 && s.g === 0 && s.b === 0 &&\n            a.r === 0 && a.g === 0 && a.b === 0 &&\n            e.r === 0 && e.g === 0 && e.b === 0)\n            d.r = d.g = d.b = 0.4;\n\n            // Apply extra polygon offset to material if applicable\n            // larger value means further away\n            tm.extraDepthOffset = parseMaterialScalar(props, \"generic_depth_offset\");\n            if (tm.extraDepthOffset) {\n              // these values are overridden after the initial render by MaterialManager.prototype.togglePolygonOffset()\n              tm.polygonOffset = true;\n              tm.polygonOffsetFactor = tm.extraDepthOffset;\n              tm.polygonOffsetUnits = 0;\n            }_context2.next = 91;break;case 86:\n\n\n            // unknown material, use default colors\n            tm.ambient = new THREE.Color(0x030303);\n            tm.color = new THREE.Color(0x777777);\n            tm.specular = new THREE.Color(0x333333);\n            tm.shininess = 30;\n            tm.shading = THREE.SmoothShading;case 91:\n\n\n            //Add the transparent flag as a top level property of the\n            //Protein JSON. This is currently how the BVH builder decides\n            //whether an object is transparent. See also Package.addTransparencyFlagsToMaterials\n            //which is an equivalent hack done on the web worker side.\n            //Normally the BVH will be built on the worker side, so this property set here is\n            //probably not needed.\n            matObj.transparent = tm.transparent;return _context2.abrupt(\"return\",\n\n            tm);case 93:case \"end\":return _context2.stop();}}}, _callee2);}));return _convertMaterial.apply(this, arguments);}\n\n\nfunction convertSimpleTexture(textureObj, texture) {\n\n  if (!textureObj)\n  return;\n\n  var texProps = textureObj[\"properties\"];\n\n  // Note that the format of these booleans is different for Protein than for regular materials:\n  // Prism: \"texture_URepeat\": { \"values\": [ false ] },\n  // simple texture: \"texture_URepeat\":    false,\n  texture.invert = parseMaterialBoolean(texProps, \"unifiedbitmap_Invert\");\n  texture.clampS = !parseMaterialBoolean(texProps, \"texture_URepeat\", true); // defaults to wrap\n  texture.clampT = !parseMaterialBoolean(texProps, \"texture_VRepeat\", true);\n  texture.wrapS = !texture.clampS ? THREE.RepeatWrapping : THREE.ClampToEdgeWrapping;\n  texture.wrapT = !texture.clampT ? THREE.RepeatWrapping : THREE.ClampToEdgeWrapping;\n\n  texture.matrix = textureObj.matrix || (textureObj.matrix = Get2DSimpleMapTransform(texProps));\n}\n\nfunction get2DMapTransform(textureObj) {\n  if (!textureObj.matrix) {\n    textureObj.matrix = Get2DSimpleMapTransform(textureObj.properties);\n  }\n  return textureObj.matrix;\n}\n\nfunction convertTexture(textureDef, texture, sceneUnit, maxAnisotropy) {\n\n  if (textureDef.mapName == \"bumpMap\" || textureDef.mapName == \"normalMap\") {\n    texture.anisotropy = 0;\n  } else {\n    texture.anisotropy = maxAnisotropy || 0;\n  }\n\n  // Default params\n  texture.flipY = textureDef.flipY !== undefined ? textureDef.flipY : true;\n  texture.invert = false;\n  texture.wrapS = THREE.RepeatWrapping;\n  texture.wrapT = THREE.RepeatWrapping;\n\n  //Per material type settings\n  if (textureDef.isPrism)\n  MaterialConverter.convertPrismTexture(textureDef.textureObj, texture, sceneUnit);else\n\n  convertSimpleTexture(textureDef.textureObj, texture);\n\n  // semi-fix for LMV-1832 - doesn't work for procedural wood, though.\n  // if ( av.isIE11 && textureDef.isPrism ) {\n  //      for (var i = 0; i < 4; i++)\n  //          texture.matrix.elements[(i<2)?i:(i+1)] *= 0.5;  // elements 0,1,3,4\n  // }\n}\n\n\nfunction isPrismMaterial(material) {\n  var innerMats = material['materials'];\n  var innerMat = innerMats[material['userassets'][0]];\n  if (innerMat) {\n    var definition = innerMat['definition'];\n    if (definition === 'TilingPattern') {\n      // if first \"material\" is a tiling pattern, look at the grout material, which must always exist.\n      var idx = innerMat.properties.references.grout_material.connections[0];\n      innerMat = innerMats[idx];\n      if (innerMat) {\n        definition = innerMat['definition'];\n      } // else it stays TilingPattern and will fail below\n    }\n    return definition === 'PrismLayered' ||\n    definition === 'PrismMetal' ||\n    definition === 'PrismOpaque' ||\n    definition === 'PrismTransparent' ||\n    definition === 'PrismGlazing' ||\n    definition === 'PrismWood';\n  }\n  return false;\n}\n\nfunction convertMaterialGltf(matObj, svf) {\n\n  var tm = new THREE.MeshPhongMaterial();\n  tm.packedNormals = true;\n  tm.textureMaps = {};\n\n  var values = matObj.values;\n\n  var diffuse = values.diffuse;\n  if (diffuse) {\n    if (Array.isArray(diffuse)) {\n      tm.color = new THREE.Color(diffuse[0], diffuse[1], diffuse[2]);\n    } else if (typeof diffuse === \"string\") {\n      //texture\n      tm.color = new THREE.Color(1, 1, 1);\n      var map = {};\n      map.mapName = \"map\";\n\n      var texture = svf.gltf.textures[diffuse];\n\n      //Use the ID of the texture, because in MaterialManager.loadTexture, the ID\n      //is mapped to the path from the asset list. The logic matches what is done\n      //with SVF materials.\n      map.uri = texture.source; //svf.manifest.assetMap[texture.source].URI;\n      map.flipY = false; //For GLTF, texture flip is OpenGL style by default, unlike Protein/Prism which is DX\n\n      tm.textureMaps[map.mapName] = map;\n    }\n  }\n\n  var specular = values.specular;\n  if (specular) {\n    tm.specular = new THREE.Color(specular[0], specular[1], specular[2]);\n  }\n\n  if (values.shininess)\n  tm.shininess = values.shininess;\n\n  tm.reflectivity = 0;\n\n  //TODO: Where to get this for glTF materials?\n  tm.transparent = false;\n\n  return tm;\n\n}\n\n\n//Using post-gamma luminance, since input colors are assumed to\n//have gamma (non-linearized).\nfunction luminance(c) {\n  return 0.299 * c.r + 0.587 * c.g + 0.114 * c.b;\n}\n\n\nfunction applyAppearanceHeuristics(mat, skipSimplePhongSpecific, depthWriteTransparent) {\n\n  var proteinMaterial = mat.proteinMat ? mat.proteinMat : null;\n\n  var isPrism = mat.prismType && mat.prismType.indexOf(\"Prism\") !== -1;\n  if (isPrism && mat.transparent) {\n    // currently Fusion objects come in as double-sided. Once ATF and Fusion fix this, they\n    // can come in as single-sided. For PRISM materials that are transparent, make these\n    // always be double sided, so they render properly in two passes, back and front displayed.\n    // The side for PrismGlazing materials is set from glazing_backface_culling property\n    // so don't override it here.\n    if (mat.side === THREE.FrontSide && mat.prismType !== \"PrismGlazing\")\n    mat.side = THREE.DoubleSide;\n\n    // Add a flag that notes that two-pass transparency is to be used. This is meant for Fusion in\n    // particular, where transparent objects are rendered in two passes, back faces then front faces.\n    // This can cause problems with other, arbitrary geometry, such as found in\n    // https://jira.autodesk.com/browse/LMV-1121.\n    // If we want to extend this two-pass rendering method to all materials, we have to come up\n    // with some rules for how to differentiate data here.\n    if (mat.side === THREE.DoubleSide && mat.depthTest)\n    mat.twoPassTransparency = true;\n    //else\n    //    mat.twoPassTransparency = false;\n  }\n\n  var maps = mat.textureMaps || {};\n\n  //apply various modifications to fit our rendering pipeline\n  if (!skipSimplePhongSpecific) {\n\n    //Is it a SimplePhong which was converted from a Prism source?\n    var isSimpleFromPrism = mat.proteinType && mat.proteinType.indexOf(\"Prism\") !== -1;\n\n    //This pile of crazy hacks maps the various flavors of materials\n    //to the shader parameters that we can handle.\n\n    if (mat.metal) {\n\n      if (!mat.reflectivity) {\n        mat.reflectivity = luminance(mat.specular);\n      }\n\n      //Special handling for Protein and Prism metals\n      if (proteinMaterial)\n      {\n        //For Prism metals, reflectivity is set to 1 and\n        //the magnitude of the specular component acts\n        //as reflectivity.\n        if (mat.reflectivity === 1)\n        mat.reflectivity = luminance(mat.specular);\n\n        if (mat.color.r === 0 && mat.color.g === 0 && mat.color.b === 0) {\n          //Prism metals have no diffuse at all, but we need a very small\n          //amount of it to look reasonable\n          //mat.color.r = mat.specular.r * 0.1;\n          //mat.color.g = mat.specular.g * 0.1;\n          //mat.color.b = mat.specular.b * 0.1;\n        } else\n        {\n          //For Protein metals, we get a diffuse that is full powered, so we\n          //scale it down\n          mat.color.r *= 0.1;\n          mat.color.g *= 0.1;\n          mat.color.b *= 0.1;\n        }\n      }\n    } else\n    {\n      //Non-metal materials\n\n      if (isSimpleFromPrism)\n      {\n        var isMetallic = false;\n\n        if (mat.proteinType === \"PrismLayered\")\n        {\n          //For layered materials, the Prism->Simple translator\n          //stores something other than reflectivity in the\n          //reflectivity term. We also do special handling\n          //for paint clearcoat, and metallic paint. Longer term,\n          //the good solution is to add things we do support to the Simple\n          //representation, or failing that, support native Prism definitions.\n          mat.clearcoat = true;\n          mat.reflectivity = 0.06;\n\n          var cats = mat.proteinCategories;\n          if (cats && cats.length && cats[0].indexOf(\"Metal\") != -1)\n          {\n            isMetallic = true;\n          }\n        }\n\n        //De-linearize this value in case of Prism, since there it\n        //seems to be physical (unlike the color values)\n        mat.reflectivity = Math.sqrt(mat.reflectivity);\n\n        if (isMetallic)\n        {\n          //metallic paint has specular = diffuse in Prism.\n          mat.specular.copy(mat.color);\n        } else\n\n        {\n          //Prism non-metals just leave the specular term as 1,\n          //relying on reflectivity alone, but our shader needs\n          //both in different code paths.\n          mat.specular.r = mat.reflectivity;\n          mat.specular.g = mat.reflectivity;\n          mat.specular.b = mat.reflectivity;\n        }\n      } else\n\n      {\n        //Get a reasonable reflectivity value if there isn't any\n        if (!mat.reflectivity) {\n          if (mat.color.r === 1 && mat.color.g === 1 && mat.color.b === 1 &&\n          mat.specular.r === 1 && mat.specular.g === 1 && mat.specular.b === 1 &&\n          !maps.map && !maps.specularMap)\n          {\n            //This covers specific cases in DWF where metals get diffuse=specular=1.\n            mat.metal = true;\n            mat.reflectivity = 0.7;\n\n            mat.color.r *= 0.1;\n            mat.color.g *= 0.1;\n            mat.color.b *= 0.1;\n          } else {\n\n            //General case\n            //For non-metallic materials, reflectivity\n            //varies very little in the range 0.03-0.06 or so\n            //and is never below 0.02.\n            mat.reflectivity = 0.01 + 0.06 * luminance(mat.specular);\n\n            //For non-metals, reflectivity is either set\n            //correctly or we estimate it above, and the specular color\n            //just carries the hue\n            //Note: Protein (but not Prism) seems to have consistently high reflectivity\n            //values for its non-metals.\n            mat.specular.r *= mat.reflectivity;\n            mat.specular.g *= mat.reflectivity;\n            mat.specular.b *= mat.reflectivity;\n          }\n\n        } else if (mat.reflectivity > 0.3) {\n          //If reflectivity is set explicitly to a high value, but metal is not, assume\n          //the material is metallic anyway and set specular=diffuse\n          //This covers specific cases in DWF.\n\n          mat.metal = true;\n          mat.specular.r = mat.color.r;\n          mat.specular.g = mat.color.g;\n          mat.specular.b = mat.color.b;\n\n          mat.color.r *= 0.1;\n          mat.color.g *= 0.1;\n          mat.color.b *= 0.1;\n        } else {\n          //For non-metals, reflectivity is either set\n          //correctly or we estimate it above, and the specular color\n          //just carries the hue\n          //Note: Protein (but not Prism) seems to have consistently high reflectivity\n          //values for its non-metals.\n          mat.specular.r *= mat.reflectivity;\n          mat.specular.g *= mat.reflectivity;\n          mat.specular.b *= mat.reflectivity;\n        }\n\n        //For transparent non-layered materials, the reflectivity uniform is\n        //used for scaling the Fresnel reflection at oblique angles\n        //This is a non-physical hack to make stuff like ghosting\n        //look reasonable, while having glass still reflect at oblique angles\n        if (mat.opacity < 1)\n        mat.reflectivity = 1.0;\n      }\n    }\n\n    //Alpha test for materials with textures that are potentially opacity maps\n    if (mat.transparent ||\n    maps.map && maps.map.uri.toLowerCase().indexOf(\".png\") !== -1 ||\n    maps.alphaMap) {\n      mat.alphaTest = 0.01;\n    }\n  }\n\n  if (maps.normalMap)\n  {\n    var scale = mat.bumpScale;\n    if (scale === undefined || scale >= 1)\n    scale = 1;\n\n    mat.normalScale = new THREE.Vector2(scale, scale);\n  } else\n\n  {\n    if (mat.bumpScale === undefined && (maps.map || maps.bumpMap))\n    mat.bumpScale = 0.03; //seems like a good subtle default if not given\n    else if (mat.bumpScale >= 1) //Protein generic mat sometimes comes with just 1.0 which can't be right...\n        mat.bumpScale = 0.03;\n  }\n\n\n  //Determine if we want depth write on for transparent materials\n  //This check is done this way because for the ghosting and selection materials\n  //we do not want to enable depth write regardless of what we do for the others\n  //in order to get the see-through effect.\n  if ((!skipSimplePhongSpecific || isPrism) && mat.transparent) {\n    if (isPrism) {\n      // normally set depth writing off for transparent surfaces\n      mat.lmv_depthWriteTransparent = true;\n      mat.depthWrite = !!depthWriteTransparent;\n    } else {\n\n      // Some models, such as Assembly_Chopper.svf, improperly are set to be transparent, even though the\n      // surface opacity is 1.0.\n      // Cutout textures (where opacity is also 1.0) should also not be considered transparent,\n      // as far as depthWrite goes.\n      if (mat.opacity >= 1.0) {\n        var hasAlphaTexture = maps.alphaMap;\n        // this is either a surface with a cutout texture, or a defective material definition\n        if (!hasAlphaTexture) {\n          // defective - turn transparency off\n          mat.transparency = false;\n        }\n        // else cutout detected: leave transparency on, leave depthWrite on\n      } else {\n        // opacity is less than 1, so this surface is meant to be transparent - turn off depth depthWrite\n        mat.lmv_depthWriteTransparent = true;\n        mat.depthWrite = !!depthWriteTransparent;\n      }\n    }\n  }\n\n  if (mat.shininess !== undefined)\n  {\n    //Blinn to Phong (for blurred environment map sampling)\n    mat.shininess *= 0.25;\n  }\n\n  //if (mat.opacity < 1.0 || maps.alphaMap)\n  //    mat.side = THREE.DoubleSide;\n\n}\n\n\n\n//Certain material properties only become available\n//once we see a geometry that uses the material. Here,\n//we modify the material based on a given geometry that's using it.\nfunction applyGeometryFlagsToMaterial(material, threegeom) {\n\n  if (threegeom.attributes.color) {\n    //TODO: Are we likely to get the same\n    //material used both with and without vertex colors?\n    //If yes, then we need two versions of the material.\n    material.vertexColors = THREE.VertexColors;\n    material.needsUpdate = true;\n  }\n\n  //If we detect a repeating texture in the geometry, we assume\n  //it is some kind of material roughness pattern and reuse\n  //the texture as a low-perturbation bump map as well.\n  if (!material.proteinType && threegeom.attributes.uv && threegeom.attributes.uv.isPattern) {\n    var setBumpScale = false;\n    if (material.map && !material.bumpMap) {\n      material.bumpMap = material.map;\n      material.needsUpdate = true;\n      setBumpScale = true;\n    }\n    if (material.textureMaps && material.textureMaps.map && !material.textureMaps.bumpMap) {\n      material.textureMaps.bumpMap = material.textureMaps.map;\n      material.needsUpdate = true;\n      setBumpScale = true;\n    }\n    if (setBumpScale && material.bumpScale === undefined)\n    material.bumpScale = 0.03; //seems like a good subtle default if not given\n  }\n\n}","\nimport * as THREE from \"three\";\n\n// Helper functions to parse ugly Protein JSON\nexport function parseMaterialColor(props, name, unused) {\n  if (!props || !props[\"colors\"])\n  return new THREE.Color(1, 0, 0); //error -- return red\n\n  var cobj = props[\"colors\"][name];\n  if (!cobj)\n  return new THREE.Color(0, 0, 0); //ok -- color is not defined\n  //which in the C++ LMVTK is equal to DEFAULT_COLOR, which is black\n\n  var vals = cobj[\"values\"];\n  if (!vals || !vals.length)\n  return new THREE.Color(1, 0, 0); //error\n\n  var rgb = vals[0];\n  return new THREE.Color(rgb[\"r\"], rgb[\"g\"], rgb[\"b\"]);\n}\n\nexport function parseMaterialScalar(props, name, undefVal) {\n  if (!props || !props[\"scalars\"])\n  return undefVal;\n\n  var vobj = props[\"scalars\"][name];\n  if (!vobj)\n  return undefVal;\n\n  return vobj[\"values\"][0];\n}\n\nexport function parseMaterialBoolean(props, name, undefVal) {\n  if (!props || !props[\"booleans\"])\n  return undefVal;\n\n  var b = props[\"booleans\"][name];\n  return b === undefined ? undefVal : b;\n}\n\nexport function parseMaterialGeneric(props, category, name, undefVal) {\n  if (!props || !props[category])\n  return undefVal;\n\n  var vobj = props[category][name];\n  if (!vobj)\n  return undefVal;\n\n  return vobj[\"values\"][0];\n}\n\nexport function SRGBToLinearFloat(component) {\n  var result = component;\n\n  if (result <= 0.04045)\n  result /= 12.92;else\n\n  result = Math.pow((result + 0.055) / 1.055, 2.4);\n\n  return result;\n}\n\nexport function SRGBToLinear(color) {\n  var r, g, b;\n\n  r = SRGBToLinearFloat(color.r);\n  g = SRGBToLinearFloat(color.g);\n  b = SRGBToLinearFloat(color.b);\n\n  return new THREE.Color(r, g, b);\n}\n\nexport function Get2DSimpleMapTransform(texProps) {\n  var uscale = parseMaterialScalar(texProps, \"texture_UScale\", 1);\n  var vscale = parseMaterialScalar(texProps, \"texture_VScale\", 1);\n  var uoffset = parseMaterialScalar(texProps, \"texture_UOffset\", 0);\n  var voffset = parseMaterialScalar(texProps, \"texture_VOffset\", 0);\n  var wangle = parseMaterialScalar(texProps, \"texture_WAngle\", 0);\n\n  return { elements: [\n    Math.cos(wangle) * uscale, Math.sin(wangle) * vscale, 0,\n    -Math.sin(wangle) * uscale, Math.cos(wangle) * vscale, 0,\n    uoffset, voffset, 1] };\n\n}\n\nexport var MaterialConverterCommon = {\n  parseMaterialColor: parseMaterialColor,\n  parseMaterialScalar: parseMaterialScalar,\n  parseMaterialBoolean: parseMaterialBoolean,\n  parseMaterialGeneric: parseMaterialGeneric,\n  SRGBToLinearFloat: SRGBToLinearFloat,\n  SRGBToLinear: SRGBToLinear,\n  Get2DSimpleMapTransform: Get2DSimpleMapTransform };","function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {try {var info = gen[key](arg);var value = info.value;} catch (error) {reject(error);return;}if (info.done) {resolve(value);} else {Promise.resolve(value).then(_next, _throw);}}function _asyncToGenerator(fn) {return function () {var self = this,args = arguments;return new Promise(function (resolve, reject) {var gen = fn.apply(self, args);function _next(value) {asyncGeneratorStep(gen, resolve, reject, _next, _throw, \"next\", value);}function _throw(err) {asyncGeneratorStep(gen, resolve, reject, _next, _throw, \"throw\", err);}_next(undefined);});};}import { createLinePatternTexture } from './LineStyleDef';\nimport { logger } from '../../logger/Logger';\nimport { MaterialConverter } from \"./MaterialConverter\";\nimport { TextureLoader } from \"../../file-loaders/main/TextureLoader\";\nimport * as THREE from \"three\";\nimport { createShaderMaterial } from \"./ShaderUtils\";\nimport { LineShader } from \"./LineShader\";\nimport { LineShaderSS } from \"./LineShaderSS\";\n\nfunction setColor(value, color, opacity) {\n  value.x = color.r;\n  value.y = color.g;\n  value.z = color.b;\n  value.w = opacity;\n}\n\n// defaults\nvar _2dSelectionColor = new THREE.Color(\"#0000FF\");\nvar _2dSelectionOpacity = 0.6;\n\n/**\n                                * @enum {number}\n                                * @readonly\n                                */\nexport var MATERIAL_VARIANT = {\n  INSTANCED: 0,\n  VERTEX_IDS: 1 };\n\n\n/**\n                    * Helper class that can optionally be used to manage surface/line materials.\n                    *\n                    * It has several responsibilities:\n                    * 1. Keeps track of materials\n                    * 2. Extends materials with LMV specific properties and keeps\n                    *    materials in sync whenever the properties change\n                    *\n                    * @constructor\n                    */\nexport function MaterialManager(renderer) {\n  this._renderer = renderer;\n  this._textures = {};\n  this._texturesToUpdate = [];\n\n  // TODO: use better naming for HDR, non-HDR, override, and line materials\n  this._materials = {};\n  this._materialsNonHDR = {};\n\n  // Surface material properties\n  this._exposureBias = 0.0;\n  this._tonemapMethod = 0;\n  this._envMapExposure = 1;\n  this._envRotationSin = 0.0;\n  this._envRotationCos = 1.0;\n  this._reflectionMap = null;\n  this._irradianceMap = null;\n  this._cutplanes = [];\n  this._mrtNormals = false;\n  this._mrtIdBuffer = undefined;\n  this._polygonOffsetOn = false;\n\n  // Line material properties\n  this._pixelsPerUnit = 1.0;\n  this._lineStyleTex = null;\n  this._swapBlackAndWhite = 0.0;\n  this._grayscaleLines = 0.0;\n  this._depthWriteTransparent = true;\n  this._needsTwoSided = false;\n  this._hasTransparentMaterial = false;\n  this.hasPrism = false;\n  this._forceDoubleSided = false;\n\n  // all indexed by modelId\n  this._layerMaskTextures = [];\n  this._layerMaps = [];\n  this._selectionTextures = {}; // yes, an object and not an array.\n\n  // Internal textures used by PrismWood material\n  this._prismWoodTextures = undefined;\n\n  this.defaultMaterial = new THREE.MeshPhongMaterial({\n    ambient: 0x030303,\n    color: 0x777777,\n    specular: 0x333333,\n    shininess: 30,\n    shading: THREE.SmoothShading,\n    reflectivity: 0 });\n\n\n  //Register the default material\n  this.addMaterial(\"__defaultMaterial__\", this.defaultMaterial);\n\n  // Create texture with different line patterns used by line shader for line styles (dashed / dotted etc.)\n  this.initLineStyleTexture();\n\n  this.refCount = 0;\n}\n\n// Material and texture management\n\nMaterialManager.prototype.dtor = function () {\n\n  this.cleanup();\n  THREE.Cache.clear();\n\n};\n\nMaterialManager.prototype._getModelHash = function (model) {\n  return 'model:' + (model ? model.id : '') + '|';\n};\n\nMaterialManager.prototype._getMaterialHash = function (model, name) {\n\n  // OTG-models have sharable materials with globally unique names. For these, we\n  // do not use per-model prefixes.\n  if (model && model.isOTG()) {\n    // Just return identity, because name is already unique.\n    return name;\n  }\n\n  return this._getModelHash(model) + 'mat:' + name;\n};\n\nMaterialManager.prototype._getTextureHash = function (model, imageUri, mapName) {\n  //TODO : It's possible that a texture is used as bitmap and bumpmap. In this situation,\n  //if the bitmap is loaded first, the bumpscale won't be updated. To fix this, I added the\n  //definition as part of the key. This is a easy fix but will make the texture loaded twice.\n  //Ideally, we need to improve the current cache to save the texture properties like matrix,\n  //invert flag, separately, because a texture can be used in many places and each of them can\n  //have different properties.\n  return this._getModelHash(model) + 'tex:' + imageUri + '|map:' + mapName;\n};\n\n/**\n    * Adds surface material without HDR properties.\n    * @param {string} name Unique material name.\n    * @param {THREE.ShaderMaterial} mat Surface material.\n    */\nMaterialManager.prototype.addNonHDRMaterial = function (name, mat) {\n  if (!mat.doNotCut)\n  mat.cutplanes = this._cutplanes;\n  this._applyMRTFlags(mat);\n\n  this._materialsNonHDR[name] = mat;\n};\n\n/**\n    * Remove material without HDR properties.\n    * @param {string} name Unique material name.\n    */\nMaterialManager.prototype.removeNonHDRMaterial = function (name) {\n  delete this._materialsNonHDR[name];\n};\n\n/**\n    * Same as addNonHDRMaterial, used for backwards API compatiblity\n    * @param name\n    * @param mat\n    */\nMaterialManager.prototype.addMaterialNonHDR = function (name, mat) {\n  this.addNonHDRMaterial(name, mat);\n};\n\n/**\n    * Adds surface material with HDR properties.\n    * @param {string} name Unique material name.\n    * @param {THREE.ShaderMaterial} mat Surface material.\n    */\nMaterialManager.prototype.addHDRMaterial = function (name, mat) {\n  if (this._reflectionMap && !mat.disableEnvMap)\n  mat.envMap = this._reflectionMap;\n  if (this._irradianceMap)\n  mat.irradianceMap = this._irradianceMap;\n  mat.exposureBias = Math.pow(2.0, this._exposureBias);\n  mat.tonemapOutput = this._tonemapMethod;\n  mat.envMapExposure = this._envMapExposure;\n  mat.envRotationSin = this._envRotationSin;\n  mat.envRotationCos = this._envRotationCos;\n\n  this._applyCutPlanes(mat);\n  this._applyMRTFlags(mat);\n  this._applyPolygonOffset(mat, this._polygonOffsetOn);\n\n  this._materials[name] = mat;\n};\n\n/**\n    * Makes sure that cutPlanes and side props of a material are set according to the currently set cutplanes.\n    * Note that this is no only necessary for new materials or if cutplane count changes between 0 and !=0.\n    */\nMaterialManager.prototype._applyCutPlanes = function (mat) {\n\n  if (mat.doNotCut) {\n    mat.cutplanes = null;\n    return;\n  }\n\n  mat.cutplanes = this._cutplanes;\n\n  // Actually, we only have to recompile if the material is new or cutplanes change between 0 and !=0.\n  // But, this function is only called in these cases anyway, so we don't optimize anything if we check here again.\n  mat.needsUpdate = true;\n\n  // Make sure that we render two-sided if cutplanes are used.\n  var needCutPlanes = this._cutplanes && this._cutplanes.length > 0;\n  if (needCutPlanes) {\n    mat.side = THREE.DoubleSide;\n  } else if (!this._needsTwoSided && !mat.is2d && !this._forceDoubleSided) {\n    // The code below sets material back to FrontSide. \n    // Problem here is the implicit assumption that this recovers the original value.\n    // E.g., it is not true for 2d materials - which are always double-sided (see create2dMaterial)\n    // We need some cleaner concept here to always guarantee that we only set FrontSide if this was originally \n    // intended for the material.\n    mat.side = THREE.FrontSide;\n  }\n};\n\nMaterialManager.prototype.addMaterial = function (name, mat, skipSimplePhongHeuristics) {\n\n  var isPrism = mat.prismType && mat.prismType.indexOf(\"Prism\") !== -1;\n\n  this.hasPrism = isPrism || this.hasPrism;\n\n  MaterialConverter.applyAppearanceHeuristics(mat, isPrism || skipSimplePhongHeuristics, this.isDepthWriteTransparentEnabled());\n\n  if (mat.side === THREE.DoubleSide) {\n    this._needsTwoSided = true;\n  }\n\n  this.addHDRMaterial(name, mat);\n};\n\n/**\n    * Adds line material for use in 2D drawings.\n    * @param {string} name Unique material name.\n    * @param {THREE.ShaderMaterial} lineMaterial Line material.\n    */\nMaterialManager.prototype.addLineMaterial = function (name, lineMaterial, modelId) {\n\n  var layerTex = modelId && this._layerMaskTextures[modelId];\n  if (layerTex) {\n    lineMaterial.defines[\"HAS_LAYERS\"] = 1;\n    lineMaterial.uniforms[\"tLayerMask\"].value = layerTex;\n  }\n\n  if (lineMaterial.hasLineStyles) {\n    lineMaterial.defines[\"HAS_LINESTYLES\"] = 1;\n    lineMaterial.defines[\"MAX_LINESTYLE_LENGTH\"] = this._lineStyleTex.image.width;\n    lineMaterial.uniforms[\"tLineStyle\"].value = this._lineStyleTex;\n    lineMaterial.uniforms[\"vLineStyleTexSize\"].value.set(this._lineStyleTex.image.width, this._lineStyleTex.image.height);\n  }\n\n  lineMaterial.uniforms[\"swap\"].value = this._swapBlackAndWhite;\n  lineMaterial.uniforms[\"grayscale\"].value = this._grayscaleLines;\n\n  if (!lineMaterial.doNotCut) {\n    lineMaterial.cutplanes = this._cutplanes;\n  }\n\n  this._updatePixelScaleForMaterial(lineMaterial);\n\n  this._materials[name] = lineMaterial;\n\n  this._applyMRTFlags(lineMaterial);\n};\n\n/**\n    * Override materials may contain multiple variants (e.g. with/without instancing).\n    *\n    * This method is like addMaterialNonHDR, but allows custom variants of\n    * this material - which are added as well.\n    *\n    * Requirement:\n    *  Custom variants of an override material m must be available in array property\n    *  called m.variants. If there is no such array, the behavior is identical with addMaterialNonHDR.\n    *\n    * @param {string}         name\n    * @param {THREE.Material} material\n    */\nMaterialManager.prototype.addOverrideMaterial = function (name, mat) {\n  // Add the main (default) override material\n  this.addNonHDRMaterial(name, mat);\n\n  // If there is just one variant of the override material, we are done.\n  if (!mat.variants) {\n    return;\n  }\n\n  // For each alternative variant of this material...\n  for (var i = 0; i < mat.variants.length; i++) {\n    var variant = mat.variants[i];\n    if (!variant) {\n      continue;\n    }\n    // Add custom variant with varied name\n    var variantName = name + \"_variant_\" + i;\n    this.addNonHDRMaterial(variantName, variant);\n  }\n};\n\n/**\n    * Returns a cloned version of the given material that has support for instancing or per-vertex ids.\n    *\n    *  The returned material is owned and cached by MaterialManager. It must be associated with a RenderModel\n    *  (specified via svfPath) to make sure that it is disposed later with the other materials of this RenderModel.\n    *\n    *    @param {THREE.Material}   srcMaterial\n    *    @param {MATERIAL_VARIANT} variant     - see MATERIAL_VARIANT enum\n    *    @param {RenderModel}      model       - determines to which RenderModel the material belongs.\n    *                                            this is important to control when the material is disposed.\n    */\nMaterialManager.prototype.getMaterialVariant = function (srcMaterial, variant, model) {\n\n  // Check if srcMaterial is sharable or owned by a single render model. If shared, the variant will be shared as well.\n  var isShared = !!srcMaterial.hash;\n\n  // Create unique name for the new material variant.\n  //  - If srcMaterial is not shared, prefix it with model-id string, so that the material will be disposed when RenderModel is removed.\n  //  - If srcMaterial is shared, use global srcMaterial hash instead, so that the material variant can be shared by multiple RenderModels.\n  var prefix = isShared ? srcMaterial.hash : this._getModelHash(model) + srcMaterial.id;\n  var matName = prefix + '|' + variant;\n\n  var result = this._materials[matName];\n  if (!result) {\n    // Create cloned material\n    result = this.cloneMaterial(srcMaterial, model);\n\n    // Apply variation\n    if (variant === MATERIAL_VARIANT.INSTANCED) {\n      result.useInstancing = true;\n      // IDs are actually provided per instance, but for the shader, it makes no difference.\n      result.vertexIds = true;\n    } else if (variant === MATERIAL_VARIANT.VERTEX_IDS) {\n      result.vertexIds = true;\n    }\n\n    this.addHDRMaterial(matName, result);\n  }\n\n  // For shared materials, we must track which RenderModels are using them. This is needed to dispose them\n  // in when they are not used anymore. (see this.cleanup)\n  if (isShared) {\n    this._addMaterialRef(result, model.id);\n  }\n\n  return result;\n};\n\n\n/**\n    * Adds intancing support for override materials: It attaches an alternative variant\n    * with instancing support, which is used by WebGLRenderer to render instanced shapes correctly.\n    *\n    *  NOTE: This function can only be used for simple override materials that have no\n    *        other alternative variants yet.\n    *\n    *   @param {THREE.Material} material\n    */\nMaterialManager.prototype.addInstancingSupport = function (material) {\n\n  // create material clone with instancing\n  var instMat = material.clone();\n  instMat.useInstancing = true;\n  instMat.packedNormals = material.packedNormals;\n\n  var wideLinesMat = material.clone();\n  wideLinesMat.wideLines = true;\n  wideLinesMat.packedNormals = material.packedNormals;\n\n  // Make this available as variant. Note that we generally store\n  // material variants as an array member mat.variants, so that we have a uniform way to find them\n  // (e.g. see MaterialManager.addOverrideMaterial), no matter if there are more variants or just one.\n  material.variants = [instMat, wideLinesMat];\n\n  // Make WebGLRenderer use the instancing material where needed\n  material.getCustomOverrideMaterial = function (shapeMaterial) {\n    if (shapeMaterial.useInstancing) {\n      // use override material with instancing\n      return this.variants[0];\n    }\n    if (shapeMaterial.wideLines) {\n      this.variants[1].linewidth = shapeMaterial.linewidth;\n      return this.variants[1];\n    }\n    // use default\n    return null;\n  };\n};\n\n/**\n    * Adds support for compact buffer layout to the material\n    *\n    *  NOTE: This function can only be used for simple override materials that have no\n    *        other alternative variants yet.\n    *\n    *   @param {THREE.Material} material\n    */\nMaterialManager.prototype.addCompactLayoutSupport = function (material) {\n\n  var cloneMaterial = function cloneMaterial(m) {\n    var c = m.clone();\n    // Share the selection texture and layer mask among variants\n    if (material.uniforms.tSelectionTexture.value)\n    c.uniforms.tSelectionTexture.value = material.uniforms.tSelectionTexture.value;\n    if (material.uniforms.tLayerMask.value)\n    c.uniforms.tLayerMask.value = material.uniforms.tLayerMask.value;\n    c.is2d = material.is2d;\n    c.modelScale = material.modelScale;\n    c.defines = Object.assign({}, material.defines);\n    c.attributes = Object.assign({}, material.attributes);\n    return c;\n  };\n\n  // create material clone with instancing\n  var compactMat = cloneMaterial(material);\n  compactMat.defines[\"UNPACK_POSITIONS\"] = 1;\n\n  var instMat = cloneMaterial(material);\n  instMat.defines[\"USE_INSTANCING\"] = 1;\n\n  var compactInstMat = cloneMaterial(material);\n  compactInstMat.defines[\"UNPACK_POSITIONS\"] = 1;\n  compactInstMat.defines[\"USE_INSTANCING\"] = 1;\n\n  // Make this available as variant. Note that we generally store\n  // material variants as an array member mat.variants, so that we have a uniform way to find them\n  // (e.g. see MaterialManager.addOverrideMaterial), no matter if there are more variants or just one.\n  material.variants = [compactMat, instMat, compactInstMat];\n\n  // Make WebGLRenderer use the instancing material where needed\n  material.getCustomOverrideMaterial = function (shapeMaterial) {\n    if (shapeMaterial.defines) {\n      // Use override with appropriate flags\n      var index = (shapeMaterial.defines[\"UNPACK_POSITIONS\"] ? 1 : 0) + (\n      shapeMaterial.defines[\"USE_INSTANCING\"] ? 2 : 0);\n      if (index > 0)\n      return this.variants[index - 1];\n    }\n    // use default\n    return null;\n  };\n};\n\n\n/**\n    * Removes material from the manager.\n    * @param {string} name Unique material name.\n    */\nMaterialManager.prototype.removeMaterial = function (name) {\n  delete this._materials[name];\n};\n\n/**\n    * Finds material by name.\n    * @param {RenderModel} [model] Optional model in which to look for the material.\n    * @param {string} name Material name.\n    * @returns Desired material, or undefined if not found.\n    */\nMaterialManager.prototype.findMaterial = function (model, name) {\n  var hname = this._getMaterialHash(model, name);\n  var mat = this._materials[hname];\n  return mat;\n};\n\nMaterialManager.prototype.convertSharedMaterial = /*#__PURE__*/function () {var _ref = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee(model, matObj, matHash) {var surfaceMat;return regeneratorRuntime.wrap(function _callee$(_context) {while (1) {switch (_context.prev = _context.next) {case 0:\n\n            // check if material is already known from another RenderModel\n            surfaceMat = this.findMaterial(model, matHash);if (\n\n            surfaceMat) {_context.next = 6;break;}_context.next = 4;return (\n              this.convertOneMaterial(model, matObj, matHash));case 4:surfaceMat = _context.sent;\n            surfaceMat.hash = matHash;case 6:\n\n\n            // for shared materials, track which RenderModels are using it.\n            this._addMaterialRef(surfaceMat, model.id);return _context.abrupt(\"return\",\n\n            surfaceMat);case 8:case \"end\":return _context.stop();}}}, _callee, this);}));return function (_x, _x2, _x3) {return _ref.apply(this, arguments);};}();\n\n\nMaterialManager.prototype.convertOneMaterial = /*#__PURE__*/function () {var _ref2 = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee2(model, matObj, matName) {var isPrism, svf, sceneUnit, woodTextures, surfaceMat, innerMats, globalTile, materialIndices, tileIndices, inputTiles, i, innerTile, material, di, dlen, decal;return regeneratorRuntime.wrap(function _callee2$(_context2) {while (1) {switch (_context2.prev = _context2.next) {case 0:\n\n            isPrism = MaterialConverter.isPrismMaterial(matObj);if (!\n            isPrism) {_context2.next = 4;break;}_context2.next = 4;return (\n              MaterialConverter.loadMaterialConverterPrismLibrary());case 4:\n\n\n            svf = model.getData();\n            sceneUnit = svf && svf.materials ? svf.materials.scene.SceneUnit : \"inch\";\n            // Set the prism wood textures for this MaterialManager, and save the old ones\n            woodTextures = isPrism && MaterialConverter.swapPrismWoodTextures(this._prismWoodTextures);\n            if (woodTextures) {\n              // We don't expect there to ever be wood textures outside of the material manager\n              // but if an application calls MaterialConverter.convertMaterial directly this can happen.\n              logger.warn(\"Unexpected wood textures converting a material\");\n            }\n            // gets material, or grout material if tiling is found\n            _context2.next = 10;return MaterialConverter.convertMaterial(matObj, sceneUnit);case 10:surfaceMat = _context2.sent;\n\n            // We obey the double-sided global flag, but have asked ATF to minimize its use in the future.\n            // Unnecessarily setting this to true wastes GPU cycles by processing hidden geometry.\n            //TODO: it sucks to have this hack here, but it's the last place where we have the model\n            //available to check the global double sided flag.\n            if (svf.doubleSided)\n            surfaceMat.side = THREE.DoubleSide;\n\n            // last thing: add material to the materials array, performing any special processing needed.\n            this.addMaterial(matName, surfaceMat);\n\n            // Note if any material added this way is transparent. This property can be used to shortcut various\n            // refreshes, etc. This must be done in this method, not addMaterial itself, as the default _fadeMaterial\n            // is transparent. We care only about objects' materials here.\n            this._hasTransparentMaterial = this._hasTransparentMaterial || surfaceMat.transparent;\n\n            // Process tiling, if any\n            if (!MaterialConverter.hasTiling(matObj)) {_context2.next = 36;break;}\n            // The decals system is used for both tilings and decals:\n            //   draw the grout (underlying) surface material fully\n            //   draw all the tiles, composited atop\n            //   draw all the decals, composited atop\n            // Tilings are applied, one by one, then decals.\n            surfaceMat.decals = [];\n\n            // extract the tile descriptions from the matObj into an array\n            innerMats = matObj['materials'];\n            globalTile = innerMats[matObj['userassets'][0]];\n            materialIndices = globalTile.properties.references.base_materials.connections;\n            tileIndices = globalTile.properties.references.tiles.connections;\n            inputTiles = [];\n            // put tiles in list into inputTiles, and generate output materials for each into the decals list\n            i = 0;case 22:if (!(i < tileIndices.length)) {_context2.next = 35;break;}\n            innerTile = innerMats[tileIndices[i]];\n            inputTiles.push(innerTile);\n            // add a decal material for each tile, which gets parameters added to by materialTilingPattern.\n            _context2.next = 27;return MaterialConverter.convertMaterial(matObj, sceneUnit, null, materialIndices[i]);case 27:material = _context2.sent;\n            material.useTiling = true;\n            // Make it transparent for AA to work properly - TODOTODO could make this optional, but I think it's better always on.\n            // Still, doing so does cost a bit of performance: blending is always more involved than simple replace.\n            // If AA is off, this value can be false, for (slightly?) faster performance\n            material.transparent = true;\n            surfaceMat.decals.push({\n              uv: 0, // TODOTODO - assumes UV channel 0 is used - this might be wrong; hard to tell without good test data\n              material: material });\n\n            this.addMaterial(matName + '|tile|' + i, material); // giving it a unique name - TODOTODO: do we need something else here?\n          case 32:i++;_context2.next = 22;break;case 35:\n\n            // We have already processed the grout with convertMaterial, above.\n            // Now walk through the tilings, find their related materials, put in two arrays, while also gathering the\n            // global tiling information and using that to fully form the \"decals\" materials.\n            // At this point each inputTiles element in the array will directly correspond to a material in the decals array.\n            // To clarify:\n            // * matObj contains the read-in ProteinMaterials.json file (it should also work on non-PRISM materials; future-proof)\n            // * globalTile is a temporary object of the \"tile\" global information, that affects all tiles\n            // * inputTiles is an array of the TilingAppearanceSchema (the individual tiles) in the matObj, for convenience;\n            //   this array could be made inside materialTilingPattern, but it felt a bit more structured to just do so here.\n            // * surfaceMat.decals is the list of decal material, already created above, that will then get tiling information\n            //   added to them. Note no rendering changes are needed: tiles and decals are put into this same array, and are\n            //   rendered and composited on top of each other, one after the other.\n            // * sceneUnit - the global scene unit, used when extracting information from matObj\n            MaterialConverter.materialTilingPattern(matObj, globalTile, inputTiles, surfaceMat.decals, sceneUnit);case 36:if (!\n\n\n\n            matObj.decals) {_context2.next = 49;break;}\n            // may have been defined by a tiling\n            if (!surfaceMat.decals) {\n              surfaceMat.decals = [];\n            }\n            di = 0, dlen = matObj.decals.length;case 39:if (!(di < dlen)) {_context2.next = 49;break;}\n            decal = matObj.decals[di];_context2.next = 43;return (\n              MaterialConverter.convertMaterial(decal.material, sceneUnit));case 43:material = _context2.sent;\n            surfaceMat.decals.push({\n              uv: decal.uv || 0,\n              material: material });\n\n            this.addMaterial(matName + '|decal|' + di, material);case 46:di++;_context2.next = 39;break;case 49:\n\n\n\n            /* standalone, convert decals to tiles, test code. Left here to show some sample tiling patterns and how they're set.\n                                                                                                                 // fake out: turn decals into tiles\n                                                                                                                 if (matObj.decals) {\n                                                                                                                     // 0 - diamonds (no longer supported?)\n                                                                                                                     // 1 - Hexagons 2x2 - TilingPattern-012\n                                                                                                                     // 2 - Basketweave - TilingPattern-014\n                                                                                                                     // 3 - Herringbone 3x1 - TilingPattern-006\n                                                                                                                     // 4 - Hopscotch 1/4 - TilingPattern-017\n                                                                                                                     let pattern = 3;\n                                                                                                                     let vector_a = [\n                                                                                                                         new THREE.Vector2( 1.02286470, 1.77165353 ),\n                                                                                                                         new THREE.Vector2( 2, 0 ),\n                                                                                                                         new THREE.Vector2( 2, 2 ),\n                                                                                                                         new THREE.Vector2( 1, 1 ),\n                                                                                                                         new THREE.Vector2( 1.0,-0.25 )\n                                                                                                                     ];\n                                                                                                                     let vector_b = [\n                                                                                                                         new THREE.Vector2( 2.04572940, 0.0 ),\n                                                                                                                         new THREE.Vector2( 0, 1.732051 ),\n                                                                                                                         new THREE.Vector2( 2, -2 ),\n                                                                                                                         new THREE.Vector2( 3, -3 ),\n                                                                                                                         new THREE.Vector2( 1.25,0.75 )\n                                                                                                                     ];\n                                                                                                                     let num_tiles = [3,4,4,2,2];\n                                                                                                                     // see https://wiki.autodesk.com/x/3wAjFQ for more information\n                                                                                                                     let incomingTileDescription = {tiling: null};\n                                                                                                                     incomingTileDescription.tiling = {\n                                                                                                                         // one tiling direction\n                                                                                                                         offset_vector_a: vector_a[pattern],\n                                                                                                                         offset_vector_a_x_units: \"mm\",   // OGS uses two units: scale_factor_x and scale_factor_y. See MaterialTilingPattern\n                                                                                                                         offset_vector_a_y_units: \"mm\",\n                                                                                                                         // the other tiling direction\n                                                                                                                         offset_vector_b: vector_b[pattern],\n                                                                                                                         offset_vector_b_x_units: \"mm\",\n                                                                                                                         offset_vector_b_y_units: \"mm\",\n                                                                                                                         // implied: grout_material\n                                                                                                                         // A 2D vector that specifies what 1 horizontal and 1 vertical length unit in the tiling description\n                                                                                                                         // maps to in real world units (e.g. 1 inch, 2 cm, etc.). This applies to the tile vertex coordinates and the\n                                                                                                                         // tile axis vectors a and b. In other words, this scaling only affects tile shapes. It does not scale texture\n                                                                                                                         // space, and does not affect the parameters below (inset, rounding, overall offset).\n                                                                                                                         scale_factor: new THREE.Vector2( 1,1 ),\n                                                                                                                         //scale_factor: new THREE.Vector2( 0.254, 0.254 ),    // for OGS tiling 17 testing\n                                                                                                                         scale_factor_x_units: \"mm\",\n                                                                                                                         scale_factor_y_units: \"mm\",\n                                                                                                                         // Width of each tile along its edge that should instead be grout. Note that the grout width is then 2x this size.\n                                                                                                                         inset_size: 0.0, // 0.005, // 0 * 0.4,\n                                                                                                                         inset_size_units: \"mm\",\n                                                                                                                         // The distance from the nearest tile edge where rounding will start. It is a scalar\n                                                                                                                         // with a specified unit.\n                                                                                                                         corner_rounding_size: 0.2, // 0.05,  // aka mInsetRadius in OGS\n                                                                                                                         corner_rounding_size_units: \"mm\",\n                                                                                                                         // The angle between the original tile normal and the modified (rounded) normal\n                                                                                                                         // at the edge of the tile (default unit: degrees).\n                                                                                                                         corner_rounding_angle: 45.0,\n                                                                                                                         corner_rounding_angle_units: \"\",\n                                                                                                                         // Offset the whole tiling in a given 2D direction, with a specified unit.\n                                                                                                                         overall_offset_vector: new THREE.Vector2( 0.0, 0.0 ),\n                                                                                                                         // Rotate the whole tiling by this angle (default unit: degrees).\n                                                                                                                         overall_rotation_angle: 0,\n                                                                                                                         overall_rotation_angle_units: \"\",\n                                                                                                                     };\n                                                                                                                      (surfaceMat as any).decals = [];\n                                                                                                                     let materials = [];\n                                                                                                                     if ( matObj.decals.length > num_tiles[pattern] ) {\n                                                                                                                         matObj.decals = matObj.decals.slice(0,num_tiles[pattern]);\n                                                                                                                     }\n                                                                                                                     for (var di = 0, dlen = matObj.decals.length; di < dlen; di++) {\n                                                                                                                         var decal = matObj.decals[di];\n                                                                                                                         //var material = MaterialConverter.convertMaterial(decal.material, sceneUnit);\n                                                                                                                         // CHEAT - use surface (prism) material, by making a copy of it\n                                                                                                                         var material = MaterialConverter.convertMaterial(matObj, sceneUnit);\n                                                                                                                         // needs to be at the material level so it's in \"parameters\"\n                                                                                                                         material.useTiling = true;\n                                                                                                                         // Controls the randomization of base material position within the tile. The possible\n                                                                                                                         // values are offset_none (points on the tile use standard UV queries as if the material was not tiled),\n                                                                                                                         // offset_within (map tile to a random position within the material, not crossing texture boundaries),\n                                                                                                                         // and offset_any (map tile to a random position within the material).\n                                                                                                                         // no randomness\n                                                                                                                         // None = 0,\n                                                                                                                         // random offset within texture\n                                                                                                                         // Bounded = 1,\n                                                                                                                         // random offset in any value\n                                                                                                                         // Uniform = 2\n                                                                                                                          // this needs to be set per tile by incoming data\n                                                                                                                         decal.randomOffsetMode = 2; //1; // 0, 1, 2\n                                                                                                                         // Per tile rotation of the underlying material UV space (not rotating the tile itself). Default unit: degrees.\n                                                                                                                         decal.rotationAngle = 0; //( di === 0 ? 10.0 : ( di === 1 ? 20.0 : 30.0 ));\n                                                                                                                         // per tile scale\n                                                                                                                         decal.vertices_units = \"mm\";\n                                                                                                                          // make it transparent for AA to work properly\n                                                                                                                         material.transparent = true;\n                                                                                                                         if ( di == 0 ) {\n                                                                                                                             //material.color.setRGB( 1.0, 0.0, 0.0 );\n                                                                                                                             material.opaque_albedo.setRGB( 1.0, 1.0, 1.0 );\n                                                                                                                             //material.surface_albedo.setRGB( 1.0, 0.0, 0.0 );\n                                                                                                                             // lower right\n                                                                                                                             if ( pattern === 0 ) {\n                                                                                                                                 // diamonds (no longer supported?)\n                                                                                                                                 decal.vertices = [\n                                                                                                                                     new THREE.Vector2(2.91029167, 6.67924833),\n                                                                                                                                     new THREE.Vector2(2.91029167, 5.49814606),\n                                                                                                                                     new THREE.Vector2(3.93315625, 4.90759516),\n                                                                                                                                     new THREE.Vector2(3.93315625, 6.08869743) ];\n                                                                                                                             } else if ( pattern === 1 ) {\n                                                                                                                                 // Hexagons 2x2 - TilingPattern-012\n                                                                                                                                 decal.vertices = [\n                                                                                                                                     new THREE.Vector2(1,0.86603),\n                                                                                                                                     new THREE.Vector2(0.5,1.1547),\n                                                                                                                                     new THREE.Vector2(0,0.86603),\n                                                                                                                                     new THREE.Vector2(0,0.28868),\n                                                                                                                                     new THREE.Vector2(0.5,0),\n                                                                                                                                     new THREE.Vector2(1,0.28868) ];\n                                                                                                                             } else if ( pattern === 2 ) {\n                                                                                                                                 // Basketweave - TilingPattern-014\n                                                                                                                                 decal.rotationAngle += 90;\n                                                                                                                                 decal.vertices = [\n                                                                                                                                     new THREE.Vector2(1,3),\n                                                                                                                                     new THREE.Vector2(0,3),\n                                                                                                                                     new THREE.Vector2(0,0),\n                                                                                                                                     new THREE.Vector2(1,0) ];\n                                                                                                                             } else if ( pattern === 3 ) {\n                                                                                                                                 // Herringbone 3x1 - TilingPattern-006\n                                                                                                                                 decal.vertices = [\n                                                                                                                                     new THREE.Vector2(3,1),\n                                                                                                                                     new THREE.Vector2(0,1),\n                                                                                                                                     new THREE.Vector2(0,0),\n                                                                                                                                     new THREE.Vector2(3,0) ];\n                                                                                                                             } else {\n                                                                                                                                 // Hopscotch 1/4 - TilingPattern-017\n                                                                                                                                 decal.vertices = [\n                                                                                                                                     new THREE.Vector2(1,1),\n                                                                                                                                     new THREE.Vector2(0,1),\n                                                                                                                                     new THREE.Vector2(0,0),\n                                                                                                                                     new THREE.Vector2(1,0) ];\n                                                                                                                             }\n                                                                                                                         }\n                                                                                                                         else if ( di == 1 ) {\n                                                                                                                             //material.color.setRGB( 0.0, 1.0, 0.0 );\n                                                                                                                             material.opaque_albedo.setRGB( 0.3, 0.3, 0.3 );\n                                                                                                                             //material.surface_albedo.setRGB( 0.0, 1.0, 0.0 );\n                                                                                                                             // top\n                                                                                                                             if ( pattern === 0 ) {\n                                                                                                                                 decal.vertices = [\n                                                                                                                                     new THREE.Vector2(4.95602083, 6.67924833),\n                                                                                                                                     new THREE.Vector2(3.93315625, 7.26979971),\n                                                                                                                                     new THREE.Vector2(2.91029167, 6.67924833),\n                                                                                                                                     new THREE.Vector2(3.93315625, 6.08869743) ];\n                                                                                                                             } else if ( pattern === 1 ) {\n                                                                                                                                 decal.vertices = [\n                                                                                                                                     new THREE.Vector2(2,0.86603),\n                                                                                                                                     new THREE.Vector2(1.5,1.1547),\n                                                                                                                                     new THREE.Vector2(1,0.86603),\n                                                                                                                                     new THREE.Vector2(1,0.28868),\n                                                                                                                                     new THREE.Vector2(1.5,0),\n                                                                                                                                     new THREE.Vector2(2,0.28868) ];\n                                                                                                                             } else if ( pattern === 2 ) {\n                                                                                                                                 decal.vertices = [\n                                                                                                                                     new THREE.Vector2(2,1),\n                                                                                                                                     new THREE.Vector2(1,1),\n                                                                                                                                     new THREE.Vector2(1,0),\n                                                                                                                                     new THREE.Vector2(2,0) ];\n                                                                                                                             } else if ( pattern === 3 ) {\n                                                                                                                                 // Herringbone 3x1\n                                                                                                                                 decal.rotationAngle += 90;\n                                                                                                                                 decal.vertices = [\n                                                                                                                                     new THREE.Vector2(1,4),\n                                                                                                                                     new THREE.Vector2(0,4),\n                                                                                                                                     new THREE.Vector2(0,1),\n                                                                                                                                     new THREE.Vector2(1,1) ];\n                                                                                                                             } else {\n                                                                                                                                 decal.vertices = [\n                                                                                                                                     new THREE.Vector2(1.25,1),\n                                                                                                                                     new THREE.Vector2(1,1),\n                                                                                                                                     new THREE.Vector2(1,0.75),\n                                                                                                                                     new THREE.Vector2(1.25,0.75) ];\n                                                                                                                             }\n                                                                                                                         }\n                                                                                                                         else if ( di == 2 ) {\n                                                                                                                             //material.color.setRGB( 0.0, 0.0, 1.0 );\n                                                                                                                             material.opaque_albedo.setRGB( 1.0, 0.2, 0.2 );\n                                                                                                                             //material.surface_albedo.setRGB( 0.0, 0.0, 1.0 );\n                                                                                                                             // lower left\n                                                                                                                             if ( pattern === 0 ) {\n                                                                                                                                 decal.vertices = [\n                                                                                                                                     new THREE.Vector2(4.95602083, 6.67924833),\n                                                                                                                                     new THREE.Vector2(3.93315625, 6.08869743),\n                                                                                                                                     new THREE.Vector2(3.93315625, 4.90759516),\n                                                                                                                                     new THREE.Vector2(4.95602083, 5.49814606) ];\n                                                                                                                             } else if ( pattern === 1 ) {\n                                                                                                                                 decal.vertices = [\n                                                                                                                                     new THREE.Vector2(1.5,1.7321,1,2.0207,0.5,1.7321,0.5,1.1547,1,0.86603,1.5,1.1547),\n                                                                                                                                     new THREE.Vector2(1,2.0207),\n                                                                                                                                     new THREE.Vector2(0.5,1.7321),\n                                                                                                                                     new THREE.Vector2(0.5,1.1547),\n                                                                                                                                     new THREE.Vector2(1,0.86603),\n                                                                                                                                     new THREE.Vector2(1.5,1.1547) ];\n                                                                                                                             } else if ( pattern === 2 ) {\n                                                                                                                                 decal.vertices = [\n                                                                                                                                     new THREE.Vector2(4,1),\n                                                                                                                                     new THREE.Vector2(4,2),\n                                                                                                                                     new THREE.Vector2(1,2),\n                                                                                                                                     new THREE.Vector2(1,1) ];\n                                                                                                                             }\n                                                                                                                         }\n                                                                                                                         else if ( di == 3 ) {\n                                                                                                                             //material.color.setRGB( 0.0, 0.0, 1.0 );\n                                                                                                                             material.opaque_albedo.setRGB( 1.0, 1.0, 0.2 );\n                                                                                                                             //material.surface_albedo.setRGB( 0.0, 0.0, 1.0 );\n                                                                                                                             // lower left\n                                                                                                                             if ( pattern === 1 ) {\n                                                                                                                                 decal.vertices = [\n                                                                                                                                     new THREE.Vector2(2.5,1.7321),\n                                                                                                                                     new THREE.Vector2(2,2.0207),\n                                                                                                                                     new THREE.Vector2(1.5,1.7321),\n                                                                                                                                     new THREE.Vector2(1.5,1.1547),\n                                                                                                                                     new THREE.Vector2(2,0.86603),\n                                                                                                                                     new THREE.Vector2(2.5,1.1547) ];\n                                                                                                                             } else if ( pattern === 2 ) {\n                                                                                                                                 decal.vertices = [\n                                                                                                                                     new THREE.Vector2(2,3),\n                                                                                                                                     new THREE.Vector2(1,3),\n                                                                                                                                     new THREE.Vector2(1,2),\n                                                                                                                                     new THREE.Vector2(2,2) ];\n                                                                                                                             }\n                                                                                                                         }\n                                                                                                                         (surfaceMat as any).decals.push({\n                                                                                                                             uv: 0,\n                                                                                                                             //uv: decal.uv || 0,\n                                                                                                                             material: material\n                                                                                                                         });\n                                                                                                                         this.addMaterial(matName + '|decal|' + di, material);\n                                                                                                                         materials[di] = material;\n                                                                                                                     }\n                                                                                                                     // surfaceMat.tiling is kept around, with the processed values that go into uniforms.\n                                                                                                                     MaterialConverter.materialTilingPattern(matObj.decals, incomingTileDescription.tiling, materials, sceneUnit);\n                                                                                                                 }\n                                                                                                                 */\n\n\n\n\n            // Restore the old wood textures and get the current ones for this MaterialManager.\n            this._prismWoodTextures = isPrism && MaterialConverter.swapPrismWoodTextures(woodTextures);return _context2.abrupt(\"return\",\n            surfaceMat);case 51:case \"end\":return _context2.stop();}}}, _callee2, this);}));return function (_x4, _x5, _x6) {return _ref2.apply(this, arguments);};}();\n\n\n\n/**\n                                                                                                                                                                         * Executes callback function for each material.\n                                                                                                                                                                         * @param {function} callback Callback function with material as the single parameter.\n                                                                                                                                                                         * @param {bool} [exclude2d] - skip 2d materials\n                                                                                                                                                                         * @param {bool} [includeVariants] - Include material variants, if any\n                                                                                                                                                                         * @param {Object.<string,THREE.Material>} [materials] - Optional material set to iterate. Default to this._materials\n                                                                                                                                                                         */\nMaterialManager.prototype.forEach = function (callback, exclude2d, includeVariants, materials) {\n  materials = materials || this._materials;\n  for (var name in materials) {\n    var material = materials[name];\n    if (exclude2d && material.is2d) {\n      continue;\n    }\n    callback(material);\n\n    if (includeVariants && material.variants) {\n      material.variants.forEach(function (m) {\n        m && callback(m);\n      });\n    }\n  }\n};\n\n\nvar _result = { needsClear: false, needsRender: false, overlayDirty: false };\n\n//Called at the beginning of every frame, to perform pending\n//operations like texture updates. This function also\n//has a chance to request full repaint at that time.\nMaterialManager.prototype.updateMaterials = function () {\n\n  _result.needsRender = false;\n\n  while (this._texturesToUpdate.length)\n  {\n    var def = this._texturesToUpdate.pop();\n    for (var slot in def.slots) {\n      var mats = def.slots[slot];\n      for (var i = 0; i < mats.length; i++) {\n        mats[i][slot] = def.tex;\n        mats[i].needsUpdate = true;\n\n        //If there are transparent objects in the scene, this will result in them appearing darker\n        //in the case when the model is still loading and we overdraw the same object on top of itself.\n        //This is a tradeoff to avoid screen flashing if we set needsClear instead -- with the assumption\n        //that transparent objects will tend to come later in the fragment list.\n        _result.needsRender = true;\n      }\n    }\n  }\n  return _result;\n};\n\nfunction addMaterialToPendingTexture(def, mat, slot) {\n  var mats = def.slots[slot];\n  if (mats) {\n    if (mats.indexOf(mat) == -1) {\n      mats.push(mat);\n    }\n  } else {\n    def.slots[slot] = [mat];\n  }\n}\n\n\nMaterialManager.prototype.setTextureInCache = function (model, map, tex) {\n\n  // Texture loaded successfully\n  var texName = this._getTextureHash(model, map.uri, map.mapName);\n  var def = this._textures[texName];\n\n  // If the model was unloaded before the texture loaded, the texture def will no longer exist\n  if (!def)\n  return;\n\n  if (!def.tex)\n  def.tex = tex;\n\n  // Set it on all materials that use it\n  for (var s in def.slots) {\n    var mats = def.slots[s];\n    for (var i = 0; i < mats.length; i++) {\n      mats[i][s] = tex;}\n  }\n\n  // Keep track of materials that need updating on the\n  // next frame. We can use this to throttle texture GPU upload\n  this._texturesToUpdate.push(def);\n\n};\n\n\nMaterialManager.prototype.loadTextureFromCache = function (model, material, map, slotName) {\n\n  var texName = this._getTextureHash(model, map.uri, map.mapName);\n\n  var def = this._textures[texName];\n  if (def) {\n    //Cache entry exists\n\n    if (def.tex) {\n      //Texture is already loaded, update the material directly\n      material[slotName] = def.tex;\n      material.needsUpdate = true;\n    } else {\n      //Texture started loading but is not yet here, add the material\n      //to the list of materials waiting for the texture.\n      if (!def.slots[slotName])\n      def.slots[slotName] = [];\n      def.slots[slotName].push(material);\n    }\n  } else {\n\n    //Create a blank cache entry\n    var slots = {};\n    slots[slotName] = [material];\n    this._textures[texName] = { slots: slots, tex: null };\n  }\n\n  return !!def;\n};\n\n/** Returns all materials of the given OTG RenderModel from this manager.\n    *  Note that the materials in OTG are shared, so changing a property in\n    *  a returned material could affect other models.\n    *   @param {RenderModel} model\n    */\nMaterialManager.prototype.getOtgMaterials = function (model) {\n  // Returns an object containing the hash and hash index in the matKeys\n  var getOtgMatData = function getOtgMatData(matHash, matKeys) {\n    var matIdx = matKeys.indexOf(matHash);\n    if (matIdx !== -1) {\n      return { hash: matHash, idx: matIdx };\n    }\n\n    // Check if the instanced material variant exists\n    var instHash = matHash + '|' + MATERIAL_VARIANT.INSTANCED;\n    var instIdx = matKeys.indexOf(instHash);\n    if (instIdx !== -1) {\n      return { hash: instHash, idx: instIdx };\n    }\n\n    // Check if the vertex material variant exists\n    var vertHash = matHash + '|' + MATERIAL_VARIANT.VERTEX_IDS;\n    var vertIdx = matKeys.indexOf(vertHash);\n    if (vertIdx !== -1) {\n      return { hash: vertHash, idx: vertIdx };\n    }\n  };\n\n  var materials = {};\n  // NOTE: Materials are shared between OTG models.\n  // Even though the materials are shared,\n  // we do not want to apply the doubleSided flag to global materials.\n  // Example: this function will not toggle the __defaultMaterial__, __fadeMaterial__, etc. materials\n  var modelData = model.getData();\n  var modelMatIndices = modelData.fragments.materials;\n  var matKeys = Object.keys(this._materials);\n  for (var i = 0; i < modelMatIndices.length; i++) {\n    var matIndex = modelMatIndices[i];\n    var matHash = modelData.getMaterialHash(matIndex);\n    var matData = getOtgMatData(matHash, matKeys);\n    if (matData) {\n      materials[matData.hash] = this._materials[matData.hash];\n      matKeys.splice(matData.idx, 1);\n    }\n  }\n\n  return materials;\n};\n\n/** Returns all materials of the given RenderModel from this manager\n    *   @param {RenderModel} model\n    *   @param [boolean] includeOTG - default false\n    * @returns {Object} Contains all materials indexed by name\n    */\nMaterialManager.prototype.getModelMaterials = function (model, includeOTG) {\n  var hash = this._getModelHash(model);\n\n  // Materials and materials keys for this model\n  var modelMaterials = {};\n  var selectionMaterials = {};\n\n  if (includeOTG && model.isOTG()) {\n    modelMaterials = this.getOtgMaterials(model);\n  }\n\n  for (var m in this._materials) {\n    if (m.indexOf(hash) !== -1) {\n      var mat = this._materials[m];\n\n      var isSelectionMaterial = mat.defines && mat.defines.hasOwnProperty(\"SELECTION_RENDERER\");\n      if (isSelectionMaterial) {\n        selectionMaterials[m] = mat;\n      } else {\n        modelMaterials[m] = mat;\n      }\n    }\n  }\n\n  // Non-HDR materials\n  var modelMaterialsNonHDR = {};\n  for (var m in this._materialsNonHDR) {\n    if (m.indexOf(hash) !== -1) {\n      modelMaterialsNonHDR[m] = this._materialsNonHDR[m];\n    }\n  }\n\n  // Cached textures\n  var modelTextures = {};\n  for (var t in this._textures) {\n    if (t.indexOf(hash) !== -1) {\n      modelTextures[t] = this._textures[t];\n    }\n  }\n\n  return {\n    mats: modelMaterials,\n    selectionMats: selectionMaterials,\n    matsNonHDR: modelMaterialsNonHDR,\n    textures: modelTextures };\n\n};\n\n/** Removes all materials of the given RenderModel from this manager and collects them in\n    *  a container object. This object can be used to import these materials into another MaterialManager.\n    *   @param {RenderModel} model\n    */\nMaterialManager.prototype.exportModelMaterials = function (model, targetManager) {\n  // Remember all model materials before cleaning up\n  var materials = this.getModelMaterials(model);\n\n  // Dispose all GPU resources for this model\n  this.cleanup(model);\n\n  return materials;\n};\n\n/** Adds all materials of a RenderModel to this MaterialManager. Note that Materials cannot\n    *  be owned by multiple MaterialManagers at once.\n    *   @param {Object} modelMaterials - must be obtained by a prior exportModelMaterials() call\n    *                                    to this or another MaterialManager.\n    */\nMaterialManager.prototype.importModelMaterials = function (modelMaterials, modelId) {\n  // Add materials to the new MaterialManager.\n  // Note that we exploit here that material names are unique across different MaterialManagers.\n  for (var m in modelMaterials.mats) {\n    var mat = modelMaterials.mats[m];\n    if (mat.is2d) {\n      this.addLineMaterial(m, mat, modelId);\n    } else {\n      this.addHDRMaterial(m, mat);\n    }\n  }\n\n  // Add all non-hdr materials\n  for (var m in modelMaterials.matsNonHDR) {\n    this.addMaterialNonHDR(m, modelMaterials.matsNonHDR[m]);\n  }\n\n  // Add all textures\n  for (var t in modelMaterials.textures) {\n    this._textures[t] = modelMaterials.textures[t];\n  }\n};\n\n/**\n    * Returns a copy of the given material. Note that textures are shared, not copied.\n    * If not all textures of mat are loaded yet, the owning RenderModel is required\n    * to enure that the cloned material receives the textures as well.\n    *\n    * @param {THREE.Material}    mat\n    * @param {RenderModel}       Required if some textures might not be loaded yet.\n    * @returns {THREE.Material}\n    */\nMaterialManager.prototype.cloneMaterial = function (mat, model) {\n  var material = mat.isPrismMaterial && Autodesk.Viewing.Private.clonePrismMaterial ?\n  Autodesk.Viewing.Private.clonePrismMaterial(mat) : mat.clone();\n\n  //Have to clone this manually, otherwise it's shared between the clones\n  if (mat.defines) {\n    material.defines = Object.assign({}, mat.defines);\n  }\n\n  // clone additional properties\n  if (material instanceof THREE.MeshPhongMaterial || material.isPrismMaterial) {\n    material.packedNormals = mat.packedNormals;\n    material.exposureBias = mat.exposureBias;\n    material.irradianceMap = mat.irradianceMap;\n    material.envMapExposure = mat.envMapExposure;\n    material.envRotationSin = mat.envRotationSin;\n    material.envRotationCos = mat.envRotationCos;\n    material.proteinType = mat.proteinType;\n    material.proteinMat = mat.proteinMat;\n    material.proteinCategories = mat.proteinCategories;\n    material.tonemapOutput = mat.tonemapOutput;\n    material.cutplanes = mat.cutplanes;\n    material.textureMaps = mat.textureMaps;\n    material.texturesLoaded = mat.texturesLoaded;\n  }\n\n  if (mat.doNotCut) {\n    material.doNotCut = true;\n  }\n\n  if (mat.is2d) {\n    material.is2d = true;\n  }\n  if (mat.disableEnvMap) {\n    material.disableEnvMap = true;\n  }\n\n  if (mat.textureMaps) {\n    for (var mapName in mat.textureMaps) {\n      if (mat[mapName]) {\n        // texture is already loaded - we can share it right now\n        material[mapName] = mat[mapName];\n      } else if (model) {\n        // texture loading is in progress. Make sure that the cloned\n        // material receives it as well.\n\n        // get texture name\n        var mapDef = material.textureMaps[mapName];\n        var texUri = mapDef.uri;\n        var sharedMapName = mapDef.mapName; //NOTE: mapName and mapDef.mapName could differ in case a physical texture is shared between e.g. the diffuse and bump maps\n        var texName = this._getTextureHash(model, texUri, sharedMapName);\n\n        // add new material to receiver list\n        var texReceiverObj = this._textures[texName];\n        if (!texReceiverObj) {\n          logger.error(\"Missing texture receiver\", texName);\n        } else {\n          addMaterialToPendingTexture(texReceiverObj, material, mapName);\n        }\n      } else {\n        logger.error(\"Cannot connect pending texture maps because cloneMaterial was called without a model\");\n      }\n    }\n  }\n\n  this._applyMRTFlags(material);\n\n  return material;\n};\n\n/**\n    * Sets up the THREE.Material for a fragment.\n    */\nMaterialManager.prototype.setupMaterial = function (model, threegeom, materialId) {\n\n  var svf = model.getData();\n\n  var material = this.findMaterial(model, materialId);\n\n  // This code works around an issue with the SVF data, where geometry references\n  // material definitions that are not part of the SVF (FORCE-1510)\n  if (!material) {\n    material = this.cloneMaterial(this.defaultMaterial, model);\n    var hname = this._getMaterialHash(model, materialId);\n    this._materials[hname] = material;\n    logger.warn('Material (' + materialId + ') missing, using default material instead.');\n  }\n\n  // Check if this geometry is to be rendered with a line mesh\n  if (threegeom.isLines || threegeom.isWideLines || threegeom.isPoints) {\n    // Check to see if there are vertex colors\n    var vertexColors = !!threegeom.attributes.color;\n    // Create a new LineBasicMaterial with vertexColors true/false depending on above\n    //TODO: this material also needs to be added to the materials set, but first\n    //make sure this will not cause line display side effects.\n\n    var svfmat = material;\n\n    if (!svfmat)\n    svfmat = this.defaultMaterial.clone();\n\n    if (threegeom.isPoints) {\n      material = new THREE.PointCloudMaterial(\n      {\n        vertexColors: vertexColors,\n        size: threegeom.pointSize });\n\n\n    } else {\n      var cache = vertexColors ? \"cachedLineMaterialVC\" : \"cachedLineMaterial\";\n      material = svfmat[cache];\n      if (threegeom.isWideLines) {\n        if (!material) {\n          material = svfmat[cache] = new THREE.MeshBasicMaterial({ vertexColors: vertexColors });\n          material.wideLines = true;\n          threegeom.isLines = false;\n        }\n\n        material.polygonOffset = svfmat.polygonOffset;\n        material.polygonOffsetFactor = svfmat.polygonOffsetFactor;\n        material.polygonOffsetUnits = svfmat.polygonOffsetUnits;\n        material.linewidth = svfmat.linewidth;\n      } else if (!material) {\n        material = svfmat[cache] = new THREE.LineBasicMaterial({ vertexColors: vertexColors });\n      }\n    }\n\n    // If there are no vertex colors, default to the material color\n    if (!vertexColors) {\n      material.color = svfmat.color;\n    }\n\n    // Save in material so we can map back from material to SVF id.\n    material.svfMatId = materialId;\n\n    // NOTE: For points, this will currently create one material per mesh - which should be improved.\n    //Register it with material manager so that cutplanes get updated and it gets cleaned\n    //up when the model unloads.\n    var matHash = this._getMaterialHash(model, materialId + \"_line_\" + material.id);\n    this.addMaterialNonHDR(matHash, material);\n\n    // Use line mesh\n    svf.hasLines = true;\n  } else {\n\n    // Save in material so we can map back from material to SVF id.\n    material.svfMatId = materialId;\n    MaterialConverter.applyGeometryFlagsToMaterial(material, threegeom);\n  }\n\n  return material;\n};\n\n// Track which RenderModels are using a shared material.\n// Note that we don't count references per model, but just track whether a RenderModel is using the material or not.\nMaterialManager.prototype._addMaterialRef = function (sharedMat, modelId) {\n\n  // create model-id array on first ref\n  if (!sharedMat._sharedBy) {\n    sharedMat._sharedBy = [];\n  }\n  var refs = sharedMat._sharedBy;\n\n  // don't add any model id twice\n  var index = refs.indexOf(modelId);\n  if (index !== -1) {\n    return;\n  }\n\n  refs.push(modelId);\n};\n\n// Called if a material is not used by the given RenderModel anymore.\nMaterialManager.prototype._removeMaterialRef = function (sharedMat, modelId) {\n\n  var refs = sharedMat._sharedBy;\n\n  // find modelId in reference list\n  var index = refs ? refs.indexOf(modelId) : -1;\n  if (index !== -1) {\n    // remove modeId from reference list\n    refs.splice(index, 1);\n  }\n};\n\n/**\n    * Deallocates any material related GL objects associated with the given model.\n    * !model means Deallocate all materials.\n    */\nMaterialManager.prototype.cleanup = function (model) {var _this = this;\n  var hash = this._getModelHash(model);\n\n  //Dispose all textures that were loaded as part of the given SVF\n  var newTex = {};\n\n  for (var t in this._textures) {\n    var tdef = this._textures[t];\n    if (t.indexOf(hash) === -1)\n    newTex[t] = tdef;else\n    if (tdef.tex) {\n      tdef.tex.dispose();\n      tdef.tex.needsUpdate = true;\n    }\n  }\n  this._textures = newTex;\n\n  //Remove all materials that were used by the given SVF\n  var newMats = {};\n  var DISPOSE_EVENT = { type: 'dispose' };\n\n  for (var m in this._materials) {\n\n    var mat = this._materials[m];\n\n    // If the material was solely owned by this model, or we are disposing everything, we can dispose it.\n    var disposeMat = !model || m.indexOf(hash) !== -1;\n\n    // If the material is shared, check if this was the last RenderModel using it\n    if (mat._sharedBy) {\n      if (disposeMat) {\n        mat._sharedBy.length = 0;\n      } else {\n\n        // remove model from list of models that are using this material\n        this._removeMaterialRef(mat, model.id);\n\n        // if model was the last one, dispose material\n        if (mat._sharedBy.length === 0) {\n          disposeMat = true;\n        }\n      }\n    }\n\n    if (!disposeMat) {\n      newMats[m] = this._materials[m];\n    } else {\n      var mat = this._materials[m];\n      mat.dispatchEvent(DISPOSE_EVENT);\n      mat.needsUpdate = true; //in case it gets used again\n      mat.envMap = null;\n      if (mat.is2d) {\n        // decouple from textures owned by MaterialManager\n        mat.uniforms[\"tLayerMask\"].value = null;\n        mat.uniforms[\"tLineStyle\"].value = null;\n\n        // dispose raster texture\n        var rasterTex = mat.uniforms[\"tRaster\"];\n        if (rasterTex && rasterTex.value instanceof THREE.Texture) {\n          rasterTex.value.dispose();\n          rasterTex.value.needsUpdate = true;\n        }\n      }\n    }\n  }\n\n  this._materials = newMats;\n\n  // cleanup non-HDR materials\n  var newMatsNonHDR = {};\n  for (var m in this._materialsNonHDR) {\n    if (model && m.indexOf(hash) === -1) {\n      newMatsNonHDR[m] = this._materialsNonHDR[m];\n    } else {\n      var mat = this._materialsNonHDR[m];\n      mat.dispatchEvent(DISPOSE_EVENT);\n      mat.needsUpdate = true; //in case it gets used again\n    }\n  }\n  this._materialsNonHDR = newMatsNonHDR;\n\n  // Dispose selection texture (for F2D models)\n  var disposeSelectionTex = function disposeSelectionTex(modelId, removeKey) {\n    var selectionTex = _this._selectionTextures[modelId];\n    if (selectionTex) {\n      selectionTex.dispose();\n      selectionTex.needsUpdate = true;\n      if (removeKey) delete _this._selectionTextures[modelId];\n    }\n  };\n\n  // dispose of prism wood textures, if there are any\n  this._prismWoodTextures && MaterialConverter.disposePrismWoodTextures(this._prismWoodTextures);\n  this._prismWoodTextures = undefined;\n\n  if (model) {\n    // dispose selection tex for single model\n    disposeSelectionTex(model.id, true);\n    delete this._layerMaskTextures[model.id];\n    delete this._layerMaps[model.id];\n  } else {\n    // dispose all selection textures\n    for (var key in this._selectionTextures) {\n      if (this._selectionTextures.hasOwnProperty(key)) {\n        disposeSelectionTex(key, false);\n      }\n    }\n    this._selectionTextures = {};\n    this._layerMaskTextures = {};\n    this._layerMaps = {};\n  }\n};\n\n\nMaterialManager.prototype.toggleDepthWriteTransparent = function (enable) {\n  if (this._depthWriteTransparent != enable) {\n    this._depthWriteTransparent = enable;\n    // Change depth write for the transparent objects.\n    this.forEach(function (mtl) {\n      if (mtl.lmv_depthWriteTransparent)\n      mtl.depthWrite = enable;\n    }, false, true);\n  }\n};\n\nMaterialManager.prototype.isDepthWriteTransparentEnabled = function () {\n  return this._depthWriteTransparent;\n};\n\n// Reports whether the manager has encountered a material that needs two-sided rendering.\nMaterialManager.prototype.hasTwoSidedMaterials = function () {\n  return this._needsTwoSided;\n};\n\nMaterialManager.prototype.hasTransparentMaterial = function () {\n  return this._hasTransparentMaterial;\n};\n\n\nMaterialManager.prototype.texturesLoaded = function () {\n  return this._texturesToUpdate.length === 0;\n};\n\nMaterialManager.prototype.renderer = function () {\n  return this._renderer;\n};\n\n// Surface material properties\n\n/**\n * Sets exposure bias for all surface materials.\n *\n * Exposure correction of 2^exposureBias applied to rendered output color\n * before passing into the tone mapper.\n *\n * @param {number} exposureBias Exposure bias input.\n */\nMaterialManager.prototype.setTonemapExposureBias = function (exposureBias) {\n  this._exposureBias = exposureBias;\n  var bias = Math.pow(2.0, exposureBias);\n  this.forEach(function (m) {\n    m.exposureBias = bias;\n    m.needsUpdate = true;\n  }, true, true);\n};\n\n/**\n    * Sets tone mapping method for all surface materials.\n    * @param {number} method Tone mapping method (0: none, 1: Canon lum., 2: Canon RGB)\n    */\nMaterialManager.prototype.setTonemapMethod = function (method) {\n  this._tonemapMethod = method;\n  this.forEach(function (m) {\n    m.tonemapOutput = method;\n    m.needsUpdate = true;\n  }, true, true);\n};\n\n/**\n    * Sets env. exposure for all surface materials.\n    *\n    * An additional multiplier of 2^envExposure will be applied\n    * to the env. map intensities, in case RGBM environment map is used.\n    *\n    * @param {number} envExposure Environment exposure input.\n    */\nMaterialManager.prototype.setEnvExposure = function (envExposure) {\n  var scale = Math.pow(2.0, envExposure);\n  this._envMapExposure = scale;\n  this.forEach(function (m) {\n    m.envMapExposure = scale;\n    m.needsUpdate = true;\n  }, true, true);\n};\n\n/**\n    * Sets env. rotation for all surface materials.\n    * @param {number} rotation Relative angle in radians (-Pi..Pi).\n    */\nMaterialManager.prototype.setEnvRotation = function (rotation) {\n  var s = this._envRotationSin = Math.sin(rotation);\n  var c = this._envRotationCos = Math.cos(rotation);\n  this.forEach(function (m) {\n    m.envRotationSin = s;\n    m.envRotationCos = c;\n    m.needsUpdate = true;\n  }, true, true);\n};\n\n/**\n    * Sets reflection map (env. map) for all surface materials.\n    * @param {THREE.Texture} map Reflection map.\n    */\nMaterialManager.prototype.setReflectionMap = function (map) {\n  this._reflectionMap = map;\n  this.forEach(function (m) {\n    if (!m.disableEnvMap) {\n      m.envMap = map;\n      m.needsUpdate = true;\n    }\n  }, true, true);\n};\n\n/**\n    * Sets irradiance map for all surface materials.\n    * @param {THREE.Texture} map Irradiance map.\n    */\nMaterialManager.prototype.setIrradianceMap = function (map) {\n  this._irradianceMap = map;\n  this.forEach(function (m) {\n    m.irradianceMap = map;\n    m.needsUpdate = true;\n  }, true, true);\n};\n\n/**\n    * Sets a model's surface materials to double sided or single sided.\n    * @param {boolean} enable - sets each material to double sided.\n    * @param {Autodesk.Viewing.Model} model - model instance.\n    */\nMaterialManager.prototype.setDoubleSided = function (enable, model) {\n  this._forceDoubleSided = enable; // LMV-5732 - ensure that when cutplanes are removed, single sided materials are not applied to the materials.\n  var materials = {};\n  if (model) {\n    materials = this.getModelMaterials(model, true).mats;\n  } else {\n    // Use all of the materials if the model does not exist.\n    materials = this._materials;\n  }\n\n  this.forEach(function (m) {\n    m.side = enable ? THREE.DoubleSide : THREE.FrontSide;\n    m.needsUpdate = true;\n  }, true, true, materials);\n};\n\n/**\n    * Sets cut planes for all materials\n    * Clears any existing cutplanes and populates with the new ones\n    * If empty array or undefined, cut planes will be turned off (cleared)\n    * When turning on cut planes, materials are changed to double sided.\n    * When turning off cut planes, material are change to front side, if\n    * no double sided materials were added to the material manager.\n    * Return a boolean that indicates whether materials are double or single sided.\n    */\nMaterialManager.prototype.setCutPlanes = function (cutplanes) {var _this2 = this;\n  // Update shaders if num of planes changed\n  var doubleSided = false;\n\n  // Check if we need to recompile material shaders. This happens (only) if the cutplane count\n  // changes between 0 and !=0\n  var needsUpdate = this._cutplanes.length !== (cutplanes ? cutplanes.length || 0 : 0);\n\n  // Empty array (http://jsperf.com/empty-javascript-array)\n  while (this._cutplanes.length > 0) {this._cutplanes.pop();}\n\n  // Copy cutplanes\n  if (cutplanes) {\n    for (var i = 0; i < cutplanes.length; i++) {\n      this._cutplanes.push(cutplanes[i].clone());\n    }\n  }\n\n  if (needsUpdate) {\n\n    this.forEach(function (mat) {\n      _this2._applyCutPlanes(mat);\n      doubleSided = doubleSided || mat.side == THREE.DoubleSide;\n    }, false, true);\n\n    for (var p in this._materialsNonHDR) {\n      if (!this._materialsNonHDR[p].doNotCut)\n      this._materialsNonHDR[p].needsUpdate = true;\n    }\n  }\n\n  return doubleSided || this._needsTwoSided;\n};\n\n/**\n    * Returns a copy of cut planes\n    */\nMaterialManager.prototype.getCutPlanes = function () {\n  return this._cutplanes.slice();\n};\n/**\n    * @returns {Array} The internal cutplanes array (not a copy, the actual thing)\n    */\nMaterialManager.prototype.getCutPlanesRaw = function () {\n  return this._cutplanes;\n};\n\n\nMaterialManager.prototype._applyPolygonOffset = function (mat) {\n\n  if (mat instanceof THREE.MeshPhongMaterial || mat.isPrismMaterial) {\n    mat.polygonOffset = this._polygonOffsetOn;\n    mat.polygonOffsetFactor = this._polygonOffsetFactor;\n    mat.polygonOffsetUnits = this._polygonOffsetUnits;\n    if (mat.extraDepthOffset) {\n      mat.polygonOffsetFactor += mat.extraDepthOffset;\n    }\n    mat.needsUpdate = true;\n  }\n};\n\nMaterialManager.prototype.getPolygonOffsetOn = function () {\n  return this._polygonOffsetOn;\n};\nMaterialManager.prototype.getPolygonOffsetFactor = function () {\n  return this._polygonOffsetFactor;\n};\nMaterialManager.prototype.getPolygonOffsetUnits = function () {\n  return this._polygonOffsetUnits;\n};\n\n\nMaterialManager.prototype.togglePolygonOffset = function (state, factor, units) {\n\n  this._polygonOffsetOn = state;\n  this._polygonOffsetFactor = state ? factor || 1 : 0;\n  this._polygonOffsetUnits = state ? units || 0.1 : 0; // 1.0 is much too high, see LMV-1072; may need more adjustment\n\n  var scope = this;\n\n  this.forEach(function (mat) {\n    scope._applyPolygonOffset(mat);\n  }, false, true);\n};\n\n\nMaterialManager.prototype._applyMRTFlags = function (mat) {\n\n  // Activating MRTNormals requires the existence of a variable geomNormals in the shader. (see final_frag.glsl)\n  // E.g., for MeshBasicMaterials, setting MRTNormals would cause a compile error. Therefore,\n  // we whitelist materials here that support MRT normals.\n  var matSupportsMrtNormals = mat.supportsMrtNormals ||\n  mat instanceof THREE.MeshPhongMaterial ||\n  mat.isPrismMaterial ||\n  mat instanceof THREE.MeshBasicMaterial ||\n  mat instanceof THREE.LineBasicMaterial ||\n  mat instanceof THREE.PointCloudMaterial;\n\n  var oldN = mat.mrtNormals;\n  var oldI = mat.mrtIdBuffer;\n  var hasMRT = this._renderer && this._renderer.supportsMRT();\n  mat.mrtNormals = matSupportsMrtNormals && hasMRT && this._mrtNormals;\n  mat.mrtIdBuffer = hasMRT ? this._mrtIdBuffer : undefined;\n  if (mat.mrtNormals !== oldN || mat.mrtIdBuffer !== oldI)\n  mat.needsUpdate = true;\n};\n\nMaterialManager.prototype.toggleMRTSetting = function (flags) {\n  this._mrtNormals = flags.mrtNormals;\n  this._mrtIdBuffer = flags.mrtIdBuffer;\n  var self = this;\n  function setFlags(m) {\n    self._applyMRTFlags(m);\n  }\n  this.forEach(setFlags);\n  this.forEach(setFlags, false, true, this._materialsNonHDR);\n};\n\n// Line material properties\n\nMaterialManager.prototype.initLineStyleTexture = function () {\n  this._lineStyleTex = createLinePatternTexture();\n};\n\n/**\n    * For Vector PDF, Dashed line will be generated based on the pattern,\n    * It requires this API to override the existing _lineStyleTex.\n    */\nMaterialManager.prototype.setLineStyleTexture = function (texture) {\n  this._lineStyleTex = texture;\n};\n\n/**\n    * Creates a texture where each pixel corresponds to the visibility of a 2D layer.\n    * The LineShader samples the texture to determine if a geometry is visible\n    * based on its layer visibility.\n    */\nMaterialManager.prototype.initLayersTexture = function (count, layerMap, modelId) {\n\n  //TODO: Layer and selection textures need to contain information about all models.\n  //This means that each loaded 2d model needs to have a base offset into the layer and selection\n  //textures, so that we are able to highlight and determine which specific model a pixel belongs to.\n  //If you fix this, you will need to worry about the id material, which isn't model specific,\n  //because the RenderContext just keeps one. There are other issues with multi-model scenarios.\n  //Each model has a layersMap but we only keep one, here. Also each model will call\n  //this method and changed the layer mask texture, without updating materials that use\n  //the texture being replaced. Use the layersMap and texture for the first model.\n  //This will cause problems if the first model is transfered to a new RenderContext.\n\n  // TODO: Once arbitrary layer texture size works\n  // we can base the allocation size on the layerCount\n  var tw = 256;\n\n  // TODO: Currently the shader math is limited to\n  // a square 256x256 layers mask, since it just does a\n  // scale of the two layer bytes by 1/255. We would need to\n  // send the height of the layer texture to do something smarter,\n  // or wait for texture size query in WebGL 2.\n  // var th = 0 | Math.ceil((layersList.length) / 256.0);\n  var th = 256;\n\n  // allocate data array if needed\n  var layerMaskTex = this._layerMaskTextures[modelId];\n  var layerMask = layerMaskTex ? layerMaskTex.image.data : new Uint8Array(tw * th);\n\n  // reset values\n  for (var l = 0, lEnd = count; l < lEnd; l++) {\n    layerMask[l] = 0xff;\n  }\n\n  // alloc texture if needed\n  layerMaskTex = layerMaskTex || new THREE.DataTexture(layerMask, tw, th,\n  THREE.LuminanceFormat,\n  THREE.UnsignedByteType,\n  THREE.UVMapping,\n  THREE.ClampToEdgeWrapping, THREE.ClampToEdgeWrapping,\n  THREE.NearestFilter, THREE.NearestFilter, 0);\n  layerMaskTex.generateMipmaps = false;\n  layerMaskTex.flipY = false;\n  layerMaskTex.needsUpdate = true;\n\n  this._layerMaskTextures[modelId] = layerMaskTex;\n  this._layerMaps[modelId] = layerMap;\n};\n\n/**\n    * Toggles 2D layer visibility by setting the corresponding pixel in the layers texture.\n    */\nMaterialManager.prototype.setLayerVisible = function (layerIndexes, visible, modelId) {\n  var layerMaskTex = this._layerMaskTextures[modelId],\n  layerMaskData = layerMaskTex.image.data,\n  layerMap = this._layerMaps[modelId],\n  mask = visible ? 0xff : 0;\n\n  for (var i = 0; i < layerIndexes.length; ++i) {\n    var layerIndex = layerIndexes[i];\n    layerMaskData[layerMap[layerIndex]] = mask;\n  }\n\n  layerMaskTex.needsUpdate = true;\n\n  this.forEach(function (m) {\n    if (m.is2d) {\n      m.needsUpdate = true;\n    }\n  });\n};\n\n/**\n    * @param {number} maxObjectCount Upper boundary of all ids we can expect. Used to determine required size.\n    */\nMaterialManager.prototype.initSelectionTexture = function (maxObjectCount, modelId) {\n  if (this._selectionTextures[modelId]) {\n    return this._selectionTextures[modelId];\n  }\n  var numObj = maxObjectCount || 1;\n\n  // determine texture extents\n  var tw = 4096; //NOTE: This size is assumed in the shader, so update the shader if this changes!\n  var th = 0 | Math.ceil(numObj / tw);\n  var p2 = 1;\n  while (p2 < th) {\n    p2 *= 2;}\n  th = p2;\n\n  // init all pixels with 0\n  var selectionMask = new Uint8Array(tw * th);\n  for (var i = 0; i < numObj; i++) {\n    selectionMask[i] = 0;\n  }\n\n  // create texture\n  var selectionTex = new THREE.DataTexture(selectionMask, tw, th,\n  THREE.LuminanceFormat,\n  THREE.UnsignedByteType,\n  THREE.UVMapping,\n  THREE.ClampToEdgeWrapping, THREE.ClampToEdgeWrapping,\n  THREE.NearestFilter, THREE.NearestFilter, 0);\n  selectionTex.generateMipmaps = false;\n  selectionTex.flipY = false;\n  selectionTex.needsUpdate = true;\n\n  this._selectionTextures[modelId] = selectionTex;\n  return selectionTex;\n};\n\n\n//Meshes for 2d drawings contain many objects in a single mesh.\n//So we use a mask texture to pick out which object specifically\n//to highlight or render in ghosted style. The shader samples this texture to deside whether\n//to draw or not.\nMaterialManager.prototype.highlightObject2D = function (dbId, state, modelId) {\n  var tex = this._selectionTextures[modelId];\n  if (tex) {\n    var data = tex.image.data;\n\n    data[dbId] = state ? 0xff : 0;\n\n    //TODO: partial texture update using TexSubImage possible?\n    tex.needsUpdate = true;\n  }\n};\n\nMaterialManager.prototype._updatePixelScaleForMaterial = function (\nm)\n\n\n\n{var deviceWidth = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : this._deviceWidth;var deviceHeight = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : this._deviceHeight;var pixelsPerUnit = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : this._pixelsPerUnit;var scaling = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : 1;\n\n  if (m.is2d) {\n    if (m.isScreenSpace) {\n      m.uniforms[\"size\"].value.set(deviceWidth, deviceHeight);\n      m.uniforms[\"aaRange\"].value = 0.5;\n    } else {\n      m.uniforms[\"aaRange\"].value = 0.5 / (pixelsPerUnit * m.modelScale * scaling);\n    }\n    m.uniforms[\"pixelsPerUnit\"].value = pixelsPerUnit * m.modelScale * scaling;\n  }\n};\n\n\nMaterialManager.prototype.updatePixelScale = function (pixelsPerUnit, deviceWidth, deviceHeight) {var _this3 = this;\n\n  this._pixelsPerUnit = pixelsPerUnit;\n  this._deviceWidth = deviceWidth;\n  this._deviceHeight = deviceHeight;\n\n  this.forEach(function (m) {return _this3._updatePixelScaleForMaterial(m, deviceWidth, deviceHeight, pixelsPerUnit);});\n};\n\nMaterialManager.prototype.updatePixelScaleForModel = function (model, pixelsPerUnit, deviceWidth, deviceHeight, scaling) {var _this4 = this;\n  var modelMaterials = this.getModelMaterials(model);\n  var cb = function cb(m) {return _this4._updatePixelScaleForMaterial(m, deviceWidth, deviceHeight, pixelsPerUnit, scaling);};\n  Object.values(modelMaterials.mats).forEach(cb);\n  Object.values(modelMaterials.matsNonHDR).forEach(cb);\n  Object.values(modelMaterials.selectionMats).forEach(cb);\n};\n\nMaterialManager.prototype.updateSwapBlackAndWhite = function (reverse) {\n  var val = this._swapBlackAndWhite = reverse ? 1.0 : 0.0;\n  this.forEach(function (m) {\n    if (m.is2d) {\n      m.uniforms[\"swap\"].value = val;\n    }\n  });\n};\n\nMaterialManager.prototype.setGrayscale = function (activate) {\n  var val = this._grayscaleLines = activate ? 1.0 : 0.0;\n  this.forEach(function (m) {\n    if (m.is2d) {\n      m.uniforms[\"grayscale\"].value = val;\n    }\n  });\n};\n\nMaterialManager.prototype.updateViewportId = function (vpId) {\n  this.forEach(function (m) {\n    if (m.is2d) {\n      m.uniforms[\"viewportId\"].value = vpId;\n      m.needsUpdate = true;\n    }\n  });\n};\n\nMaterialManager.prototype.create2DMaterial = function (model, material, isIdMaterial, selectionTexture, onReady) {\n  var svf = model ? model.getData() : null;\n\n  //Create a hash string of the material to see if we have\n  //already created it\n  var name = \"__lineMaterial__\";\n  if (material.image)\n  name += \"|image:\" + material.image.name;\n  if (material.clip)\n  name += \"|clip:\" + JSON.stringify(material.clip);\n  if (isIdMaterial)\n  name += \"|id\";\n  if (selectionTexture)\n  name += \"|selection\";\n  if (material.skipEllipticals)\n  name += \"|skipEllipticals\";\n  if (material.skipCircles)\n  name += \"|skipCircles\";\n  if (material.skipTriangleGeoms)\n  name += \"|skipTriangleGeoms\";\n  if (material.useInstancing)\n  name += \"|useInstancing\";\n  if (material.isScreenSpace)\n  name += \"|isScreenSpace\";\n  if (material.unpackPositions)\n  name += \"|unpackPositions\";\n  if (material.hasLineStyles)\n  name += \"|hasLineStyles\";\n  if (material.compositeOperation)\n  name += \"|\" + material.compositeOperation;\n\n  var hash = this._getMaterialHash(model, name);\n\n  if (!this._materials.hasOwnProperty(hash))\n  {\n    var lineMaterial;\n    if (material.isScreenSpace) {\n      lineMaterial = createShaderMaterial(LineShaderSS);\n      lineMaterial.isScreenSpace = true;\n    } else {\n      lineMaterial = createShaderMaterial(LineShader);\n    }\n\n    if (material.hasLineStyles) {\n      lineMaterial.hasLineStyles = true;\n    }\n\n    lineMaterial.is2d = true;\n    lineMaterial.transparent = true;\n    lineMaterial.depthWrite = false;\n    lineMaterial.depthTest = false;\n    lineMaterial.side = THREE.DoubleSide;\n    lineMaterial.blending = THREE.NormalBlending;\n\n    if (material.compositeOperation == \"multiply\") {\n      lineMaterial.blending = THREE.MultiplyBlending;\n    } else if (material.compositeOperation == \"min\" || material.compositeOperation == \"darken\") {\n      // See equation here: https://developer.android.com/reference/android/graphics/BlendMode#DARKEN\n      // Actual equation for alpha would be `Asrc + Adst - Asrc * Adst`, but this is the closest\n      // we can get with WebGL\n      lineMaterial.blending = THREE.CustomBlending;\n      lineMaterial.blendEquation = THREE.MinEquation;\n      lineMaterial.blendEquationAlpha = THREE.AddEquation;\n      lineMaterial.blendSrcAlpha = THREE.SrcAlphaFactor;\n      lineMaterial.blendDstAlpha = THREE.DstAlphaFactor;\n    }\n\n    if (isIdMaterial) {\n      //Is the caller requesting the special case of\n      //shader that outputs just IDs (needed when MRT not available)?\n      lineMaterial.defines[\"ID_COLOR\"] = 1;\n      lineMaterial.blending = THREE.NoBlending;\n    } else\n    if (selectionTexture) {\n      lineMaterial.uniforms[\"tSelectionTexture\"].value = selectionTexture;\n      lineMaterial.uniforms[\"vSelTexSize\"].value.set(selectionTexture.image.width, selectionTexture.image.height);\n      lineMaterial.defines[\"SELECTION_RENDERER\"] = 1;\n      this.get2dSelectionColor(lineMaterial.uniforms.selectionColor);\n    } else\n    {\n      this.get2dSelectionColor(lineMaterial.uniforms.selectionColor);\n\n      if (this.renderer() && this.renderer().supportsMRT()) {\n        //If the renderer can do MRT, enable it in the shader\n        //so we don't have to draw the ID buffer separately.\n        lineMaterial.mrtIdBuffer = this._mrtIdBuffer;\n      }\n    }\n\n    if (!material.skipEllipticals) {\n      lineMaterial.defines[\"HAS_ELLIPTICALS\"] = 1;\n    }\n\n    if (!material.skipCircles) {\n      lineMaterial.defines[\"HAS_CIRCLES\"] = 1;\n    }\n\n    if (!material.skipTriangleGeoms) {\n      lineMaterial.defines[\"HAS_TRIANGLE_GEOMS\"] = 1;\n    }\n\n    if (material.useInstancing) {\n      lineMaterial.defines[\"USE_INSTANCING\"] = 1;\n    }\n\n    if (material.unpackPositions && !isIdMaterial) {\n      lineMaterial.defines[\"UNPACK_POSITIONS\"] = 1;\n    }\n\n    if (material.msdfFontTexture) {\n      lineMaterial.defines[\"MSDF_TEXTURE_FONT\"] = 1;\n    }\n\n    if (material.imageUVTexture) {\n      lineMaterial.defines[\"IMAGE_UV_TEXTURE\"] = 1;\n    }\n\n    if (material.viewportBounds) {\n      // Before the viewportBounds was set here, without cloning. That meant that changing the value of one\n      // material's uniform would change the value for all materials. This could be convenient, but it's better\n      // to avoid relying on this kind of side effects unless the benefit really justifies it.\n      lineMaterial.uniforms[\"viewportBounds\"].value = material.viewportBounds.clone();\n      lineMaterial.defines[\"VIEWPORT_CLIPPING\"] = VIEWPORT_CLIPPING_TYPES.DOCUMENT;\n    }\n\n    if (typeof material.opacity === \"number\") {\n      lineMaterial.uniforms[\"opacity\"].value = material.opacity;\n    }\n\n    if (material.image) {\n\n      var onTexLoad = function onTexLoad(texture, isNPOT) {\n\n        if (!texture) {\n          if (onReady) {\n            onReady(texture, model, material);\n          }\n          return;\n        }\n\n        texture.wrapS = THREE.ClampToEdgeWrapping;\n        texture.wrapT = THREE.ClampToEdgeWrapping;\n        texture.minFilter = isNPOT ? THREE.LinearFilter : THREE.LinearMipMapLinearFilter;\n        texture.magFilter = THREE.LinearFilter;\n        texture.anisotropy = 1; // renderer.getMaxAnisotropy();\n        texture.flipY = true;\n        texture.generateMipmaps = true;\n\n        texture.needsUpdate = true;\n\n        if (!material.msdfFontTexture && !material.imageUVTexture) {\n          lineMaterial.defines[\"HAS_RASTER_QUADS\"] = 1;\n        }\n\n        lineMaterial.uniforms[\"tRaster\"].value = texture;\n\n        lineMaterial.needsUpdate = true;\n        if (onReady) {\n          onReady(texture, model);\n        }\n      };\n\n      if (typeof HTMLCanvasElement !== \"undefined\" && material.image instanceof HTMLCanvasElement ||\n      typeof HTMLImageElement !== \"undefined\" && material.image instanceof HTMLImageElement) {\n        var texture = new THREE.Texture(TextureLoader.imageToCanvas(material.image, material.compositeOperation == \"multiply\", material.compositeCanvasColor), THREE.UVMapping);\n        onTexLoad(texture, true);\n      } else {\n        TextureLoader.loadTextureWithSecurity(material.image.dataURI, THREE.UVMapping, onTexLoad, null, svf.acmSessionId);\n      }\n    }\n\n    lineMaterial.modelScale = material.modelScale || 1;\n\n    if (material.doNotCut) {\n      lineMaterial.doNotCut = true;\n    }\n\n    // The normal is set in the shader to +Z, so the 2D materials appear unaffected by shadows, but can also occlude\n    // elements behind it so their shadows are not rendered on top of this material.\n    lineMaterial.supportsMrtNormals = true;\n\n    //Initialize to blank so that TextureLoader can trivially loop over the non-existing texture maps\n    lineMaterial.textureMaps = {};\n\n    this.addLineMaterial(hash, lineMaterial, model && model.id);\n    if (isIdMaterial || selectionTexture) {\n      this.addCompactLayoutSupport(lineMaterial);\n    }\n  }\n\n  return name;\n};\n\nMaterialManager.prototype.set2dSelectionColor = function (color, opacity) {\n  _2dSelectionColor = new THREE.Color(color);\n  _2dSelectionOpacity = opacity === undefined || opacity === null ? _2dSelectionOpacity : opacity;\n  this.forEach(function (material) {\n    if (material.is2d && material.uniforms) {\n      var selectionColor = material.uniforms.selectionColor;\n      if (selectionColor) {\n        setColor(selectionColor.value, _2dSelectionColor, _2dSelectionOpacity);\n        material.needsUpdate = true;\n      }\n    }\n  });\n};\n\nMaterialManager.prototype.get2dSelectionColor = function (targetUniform) {\n  if (targetUniform)\n  setColor(targetUniform.value, _2dSelectionColor, _2dSelectionOpacity);\n\n  return _2dSelectionColor;\n};\n\nMaterialManager.prototype.get2dSelectionOpacity = function () {\n  return _2dSelectionOpacity;\n};\n\nvar VIEWPORT_CLIPPING_TYPES = {\n  DOCUMENT: 1, // Original document's viewport bounds\n  CUSTOM: 2 // Custom viewport bounds, set by `setMaterialViewportBounds`\n};\n\n/**\n    * Sets 2D material viewport bounds. Pixels outside of these bounds won't be rendered.\n    * \n    * @param {THREE.ShaderMaterial} mat material.\n    * @param {Box2} bounds viewport bounds box. Pass without bounds in order to restore original viewport values.\n    */\nMaterialManager.prototype.setMaterialViewportBounds = function (mat, bounds) {\n  // viewportBounds is only supported by 2D materials.\n  if (!mat.is2d) {\n    return;\n  }\n\n  if (bounds) {\n    // If exists, backup original document's viewport bounds before changing it.\n    if (mat.defines[\"VIEWPORT_CLIPPING\"] === VIEWPORT_CLIPPING_TYPES.DOCUMENT && !mat.originalViewportBounds) {\n      mat.originalViewportBounds = mat.uniforms[\"viewportBounds\"].value.clone();\n    }\n\n    // VIEWPORT_CLIPPING is either document or not defined - add it, and set needsUpdate to re-compile the shader with it.\n    if (mat.defines[\"VIEWPORT_CLIPPING\"] !== VIEWPORT_CLIPPING_TYPES.CUSTOM) {\n      mat.defines[\"VIEWPORT_CLIPPING\"] = VIEWPORT_CLIPPING_TYPES.CUSTOM;\n      mat.needsUpdate = true;\n    }\n\n    // `bounds` is a THREE.Box2, while the shader expects to get a Vector4.\n    mat.uniforms[\"viewportBounds\"].value = new THREE.Vector4(bounds.min.x, bounds.min.y, bounds.max.x, bounds.max.y);\n\n  } else {// no bounds - reset.\n\n    // Restore original viewportBounds if exists\n    if (mat.originalViewportBounds) {\n      mat.uniforms[\"viewportBounds\"].value = mat.originalViewportBounds.clone();\n      mat.defines[\"VIEWPORT_CLIPPING\"] = VIEWPORT_CLIPPING_TYPES.DOCUMENT;\n\n      // Notice that this needsUpdate is not mandatory for the shader to actually work correctly.\n      // If we arrived here, it means that VIEWPORT_CLIPPING is currently CUSTOM, and we change it back to DOCUMENT.\n      // The shader doesn't really cares for the actual value, as long as it exists.\n      // So if for some reason in the future we find a need to turn it off an on quickly, we can remove this line to improve perforemence.\n      mat.needsUpdate = true;\n    } else if (mat.defines[\"VIEWPORT_CLIPPING\"] === VIEWPORT_CLIPPING_TYPES.CUSTOM) {\n      delete mat.defines[\"VIEWPORT_CLIPPING\"];\n      mat.needsUpdate = true;\n    }\n  }\n};","// Also known as the depthShader, this shader computes and stores the x and y camera-space normal components and the depth.\n//\n// The z component of the normal can be derived, since we know it is a positive number and x^2 + y^2 + z^2 = 1.\n// The depth is returned in camera space (before projection), so is relative to the world's space. It will need to be\n// multiplied by the projection matrix to get the z-depth. For a perspective camera, visible values will be negative\n// numbers; for an orthographic camera this is not necessarily the case.\n\nimport normals_vert from './shaders/normals_vert.glsl';\nimport normals_frag from './shaders/normals_frag.glsl';\n\nexport var NormalsShader = {\n\n  uniforms: {\n\n    //\"opacity\" : { type: \"f\", value: 1.0 }\n    \"cutplanes\": { type: \"v4v\", value: [] } },\n\n\n  vertexShader: normals_vert,\n  fragmentShader: normals_frag };","import * as THREE from \"three\";\nimport { ShaderChunks as chunks } from './ShaderChunks';\nimport phong_vert from './shaders/phong_vert.glsl';\nimport phong_frag from './shaders/phong_frag.glsl';\n\nexport var PhongShader = {\n\n  uniforms: THREE.UniformsUtils.merge([\n\n  THREE.UniformsLib[\"common\"],\n  THREE.UniformsLib[\"bump\"],\n  THREE.UniformsLib[\"normalmap\"],\n  THREE.UniformsLib[\"lights\"],\n  THREE.UniformsLib[\"fog\"],\n  chunks.CutPlanesUniforms,\n  chunks.IdUniforms,\n  chunks.ThemingUniform,\n  chunks.ShadowMapUniforms,\n  chunks.WideLinesUniforms,\n\n  {\n    \"emissive\": { type: \"c\", value: new THREE.Color(0x000000) },\n    \"specular\": { type: \"c\", value: new THREE.Color(0x111111) },\n    \"shininess\": { type: \"f\", value: 30 },\n    \"reflMipIndex\": { type: \"f\", value: 0 },\n\n    \"texMatrix\": { type: \"m3\", value: new THREE.Matrix3() },\n    \"texMatrixBump\": { type: \"m3\", value: new THREE.Matrix3() },\n    \"texMatrixAlpha\": { type: \"m3\", value: new THREE.Matrix3() },\n\n    \"irradianceMap\": { type: \"t\", value: null },\n    \"exposureBias\": { type: \"f\", value: 1.0 },\n    \"envMapExposure\": { type: \"f\", value: 1.0 },\n    \"envRotationSin\": { type: \"f\", value: 0.0 },\n    \"envRotationCos\": { type: \"f\", value: 1.0 } }]),\n\n\n\n\n  vertexShader: phong_vert,\n  fragmentShader: phong_frag };\n\n\n\nTHREE.ShaderLib['firefly_phong'] = PhongShader;","import * as THREE from 'three';\n\n// This method sets up various uniforms for a given map, putting them\n// in an array called \"uniforms\" which are accessed by the name, such\n// as \"uniforms[surface_albedo_map_texMatrix]\".\nexport function GetPrismMapUniforms(mapName) {\n  var mtxName = mapName + \"_texMatrix\";\n  var mapInvt = mapName + \"_invert\";\n\n  var uniforms = {};\n  uniforms[mapName] = { type: \"t\", value: null };\n  uniforms[mtxName] = { type: \"m3\", value: new THREE.Matrix3() };\n  uniforms[mapInvt] = { type: \"i\", value: 0 };\n\n  return uniforms;\n}\n\nexport function GetPrismBumpMapUniforms(mapName) {\n  var mtxName = mapName + \"_texMatrix\";\n  var mapScale = mapName + \"_bumpScale\";\n  var mapType = mapName + \"_bumpmapType\";\n\n  var uniforms = {};\n  uniforms[mapName] = { type: \"t\", value: null };\n  uniforms[mtxName] = { type: \"m3\", value: new THREE.Matrix3() };\n  uniforms[mapScale] = { type: \"v2\", value: new THREE.Vector2(1, 1) };\n  uniforms[mapType] = { type: \"i\", value: 0 };\n\n  return uniforms;\n}\n\nexport var PrismUtil = {\n  GetPrismMapUniforms: GetPrismMapUniforms,\n  GetPrismBumpMapUniforms: GetPrismBumpMapUniforms };","'use strict';\n\nimport { logger } from \"../../logger/Logger\";\nimport { errorCodeString, ErrorCodes } from \"../../file-loaders/net/ErrorCodes\";\nimport { isMobileDevice, ObjectAssign, isIE11, isNodeJS, getGlobal } from \"../../compat\";\nimport * as THREE from \"three\";\nimport { createShaderMaterial } from \"./ShaderUtils\";\nimport { NormalsShader } from \"./NormalsShader\";\nimport { ShaderPass } from \"./ShaderPass\";\nimport { EdgeShader } from \"./EdgeShader\";\nimport { SAOShader } from \"./SAOShader\";\nimport { SAOBlurShader } from \"./SAOBlurShader\";\nimport { SAOMinifyFirstShader } from \"./SAOMinifyShader\";\nimport { SAOMinifyShader } from \"./SAOMinifyShader\";\nimport { FXAAShader } from \"./FXAAShader\";\nimport { BlendShader } from \"./BlendShader\";\nimport { BackgroundShader } from \"./BackgroundShader\";\nimport { CopyShader } from \"./CopyShader\";\nimport { RenderContextPostProcessManager } from \"./RenderContextPostProcess\";\n\nvar _document = getGlobal().document;\n/**\n                                       * Enumeration of important render targets generated by LMV.\n                                       */\nvar RenderTargets = {\n  Color: 1,\n  Depth: 2,\n  ModelId: 3,\n  Overlay: 4,\n  Post1: 5,\n  Post2: 6,\n  SSAO: 7,\n  PostDisplay: 8 };\n\n\nexport function RenderContext() {\n\n  var _renderer;\n  var _depthMaterial;\n  var _edgeMaterial;\n  var _idMaterial;\n\n  //The camera and lights used for an entire progressive pass (potentially several GL frames)\n  var _camera;\n  var _lights;\n  var _fog;\n\n  var _clearPass,\n  _saoBlurPass,\n  _saoPass,\n  _saoMipPass,\n  _saoMipFirstPass,\n  _fxaaPass,\n  _blendPass,\n  _copyPass;\n\n  var _saoBufferValid = false;\n  var _postShadingManager = new RenderContextPostProcessManager();\n  this.postShadingManager = function () {return _postShadingManager;};\n\n  var _lastX,_lastY,_lastID,_lastModelID,_lastIDValid = false;\n\n  var _depthTarget;\n  var _depthMipMap = null;\n  var _colorTarget = null;\n  var _overlayTarget = null;\n  var _postTarget1 = null;\n  var _postProcDisplayTarget = null;\n  var _ssaoTarget = null;\n  var _postTarget2 = null;\n  var _idTargets = [];\n\n  var _exposure = 0.0;\n  var _exposureBias = 0.0;\n  var _envRotation = 0.0;\n  var _tonemapMethod = 0;\n  var _unitScale = 1.0;\n\n  var _w, _h;\n  var _warnedLeak = false;\n\n  // An offscreen context avoids affecting the main canvas Rendering\n  var _isOffscreen = false;\n\n  var _readbackBuffer = new Uint8Array(4);\n  var _idRes = [0, 0]; // Reused in rolloverObjectViewport\n\n  var _white = new THREE.Color().setRGB(1, 1, 1);\n  var _black = new THREE.Color().setRGB(0, 0, 0);\n  var _edgeColor = new THREE.Vector4(0, 0, 0, 0.3);\n  var _edgeColorHighlight = new THREE.Vector4(1, 1, 1, 1);\n  var _edgeColorHighlightUnder = new THREE.Vector4(1, 1, 1, 0.5);\n  var _clearColor = null;\n  var _clearAlpha = 1.0;\n  var _useOverlayAlpha = 1.0;\n  var _isWeakDevice = false;\n\n  var _isRenderingHidden = false;\n  var _isRenderingOverlays = false;\n\n  var _mrtFloat32Works = false;\n  var _mrtRGBA8Works = false;\n  var _depthTargetFormat = THREE.RGBAFormat;\n  var _depthTargetType = THREE.FloatType;\n  var _depthTargetSupported = false;\n\n  // Smooth fade-in of roll-over highlighting\n  var _lastObjTime = 0,\n  _lastHighlightId = 0,\n  _lastHighlightModelId = 0,\n  _easeCurve = [0.42, 0, 1, 1],\n  _easeSpeed = 0.004,\n  _rollOverFadeEnabled = true;\n\n  //Rendering options\n  var _settings = {\n    antialias: true,\n    sao: false,\n    useHdrTarget: false,\n    haveTwoSided: false,\n    useSSAA: false, /* Whether to use supersampled targets when antialiasing is used (default is FXAA) */\n    idbuffer: true,\n    customPresentPass: false,\n    envMapBg: false,\n    numIdTargets: 1, //must be 1 or 2; 2 is required for multi-model rollover highlight to work properly.\n    renderEdges: false,\n    useIdBufferSelection: false // whether to use idBuffer selection in blendShader.\n  };\n\n  var _oldSettings = {};\n\n  // Default null. Only needed when cross fading is used.\n  var _crossFade = null; // {TargetCrossFade}\n\n  // If a target is set (default null), the final frame is rendered into _offscreenTarget instead of the canvas.\n  var _offscreenTarget = null;\n\n  //TODO: hide this once there is a way\n  //to obtain the current pipeline configuration\n  this.settings = _settings;\n\n  this.depthTargetSupported = function () {return _depthTargetSupported;};\n\n  this.isRolloverHighlightEnabled = function () {return _enableRolloverHighlight;};\n\n  this.isWeakDevice = function () {return _isWeakDevice;};\n\n  // Create the depth target.\n  function createDepthTarget(sw, sh, format, type, colorTarget) {\n    var depthTarget = new THREE.WebGLRenderTarget(sw, sh,\n    { minFilter: THREE.NearestFilter,\n      magFilter: THREE.NearestFilter,\n      format: format,\n      type: type,\n      stencilBuffer: false });\n    if (colorTarget) {\n      depthTarget.shareDepthFrom = colorTarget;\n    }\n    depthTarget.name = \"depthTarget\";\n    return depthTarget;\n  }\n\n  // Check whether format and type combination is supported on this device.\n  function isDepthTargetTypeSupported(type) {\n    try {\n      var target = createDepthTarget(2, 2, type.format, type.type);\n      target.generateMipmaps = false;\n      //target.depthBuffer = false;\n      _renderer.setRenderTarget(target);\n      var gl = _renderer.context;\n      var status = gl.checkFramebufferStatus(gl.FRAMEBUFFER);\n      _renderer.setRenderTarget(null);\n      target.dispose();\n      return status === gl.FRAMEBUFFER_COMPLETE;\n    } catch (e) {\n      // An exception means this type isn't supported.\n      return false;\n    }\n  }\n\n  // Find the format and type combination for the depth targett that works for this device\n  function determineDepthTargetType() {\n    var types = _isWeakDevice ?\n    [\n    { format: THREE.RGBAFormat, type: THREE.HalfFloatType },\n    { format: THREE.RGBAFormat, type: THREE.FloatType }] :\n    [\n    { format: THREE.RGBAFormat, type: THREE.FloatType },\n    { format: THREE.RGBAFormat, type: THREE.HalfFloatType }];\n\n\n    var type = types.find(isDepthTargetTypeSupported);\n\n    if (type) {\n      _depthTargetSupported = true;\n      _depthTargetFormat = type.format;\n      _depthTargetType = type.type;\n    } else {\n      _depthTargetSupported = false;\n      logger.warn(\"Depth target is unsupported for this device.\");\n    }\n  }\n\n  // Tell BlendShader whether to use idBufferSelection.\n  //\n  // Criteria for deciding this flag:\n  //\n  //  - Color Changes: When not using idBufferSelection, BlendShader uses a color-based heuristic to detect highlighting pixels.\n  //                   This causes some unwanted color changes in overlay, e.g. when drawing blue polygons in Edit2D.\n  //                   => If possible, we use IDBuffer selection to avoid this.\n  //\n  //  - 3D Highlighting: Only drawback of id-buffer selection is a minor difference in 3D selection highlighting: \n  //                     There will be no outline around the outer edge of the selection in 3D in case it's behind another element, \n  //                     because the ID buffer only has the topmost ID. see https://autodesk.slack.com/archives/CB7E2E109/p1576852154013600\n  //                     => If wanted by the client, we allow disabling idBuffer selection.\n  //\n  //  Therefore:\n  //   - For 2D, we always use idBuffer selection if an idTarget is available.\n  //   - For 3D, we decide based on options.useIdBufferSelection in RenderContext.init.\n  //\n  function setIdBufferSelectionEnabled(enabled) {\n    _settings.useIdBufferSelection = enabled;\n\n    if (enabled) {\n      _blendPass.material.defines.USE_IDBUFFER_SELECTION = \"1\";\n    } else {\n      delete _blendPass.material.defines.USE_IDBUFFER_SELECTION;\n    }\n  }\n\n  // @param {WebGLRenderer}        glrenderer\n  // @param {number}               width, height - render target extents\n  // @param {object}               [options]\n  // @param {bool}                 [options.offscreen] - By default (false), we render into the canvas of WebGLRenderer. If true, we render into an offscreen target instead - without affecting the main canvas.\n  // @param {useIdBufferSelection} [options.useIdBufferSelection] - Use separate id buffer. If false, the BlendShader has to use a color-based heuristic to detect edges of selected objects.\n  //                                                                Note: This flag is only relevant for 3D. For 2D, we always use idBufferSelection if we have an idBuffer.\n  this.init = function (glrenderer, width, height) {var options = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};\n\n    var offscreen = options.offscreen;\n    var useIdBufferSelection = options.useIdBufferSelection !== undefined ? options.useIdBufferSelection : BUILD_FLAG__USE_IDBUFFER_SELECTION_BY_DEFAULT;\n\n    createRenderPasses();\n\n    if (!glrenderer) {\n      if (!isNodeJS())\n      logger.error(\"You need a gl context to make a renderer. Things will go downhill from here.\", errorCodeString(ErrorCodes.BROWSER_WEBGL_NOT_SUPPORTED));\n      return;\n    }\n\n    _isWeakDevice = isMobileDevice();\n\n    _settings.idbuffer = !_isWeakDevice;\n\n    if (useIdBufferSelection) {\n      _settings.idbuffer = true;\n      _settings.numIdTargets = 2;\n      _blendPass.material.defines.USE_MODEL_ID = \"1\";\n\n      setIdBufferSelectionEnabled(true);\n    }\n\n    _w = width;\n    _h = height;\n\n    _renderer = glrenderer;\n\n    _isOffscreen = !!offscreen;\n\n    determineDepthTargetType();\n\n    //delayed until first begin frame\n    //this.initPostPipeline(_settings.sao, _settings.antialias);\n\n  };\n\n  // Enable/Disable depthWrite for a material and all its override variants\n  function setDepthWriteEnabled(material, enabled) {\n\n    // Note that changing depthWrite does not need to set material.update to true.\n    material.depthWrite = enabled;\n\n    for (var i = 0; i < material.variants.length; i++) {\n      var variant = material.variants[i];\n      if (variant) {\n        variant.depthWrite = enabled;\n      }\n    }\n  }\n\n  // Creates material for normal-depth shader - including alternative variants\n  // for instancing and with/without cutplanes.\n  function createDepthMaterial() {\n\n    // create main/default override material first\n    var depthShader = NormalsShader;\n    _depthMaterial = createShaderMaterial(depthShader);\n    _depthMaterial.blending = THREE.NoBlending;\n    _depthMaterial.packedNormals = true;\n    // normally the color target will write to the z-buffer, so depth does not need to do so.\n    _depthMaterial.depthWrite = false;\n\n    // Flags to define alternative depth material variants.\n    var DepthMaterialFlags = {\n      NoCutPlanes: 0x01, // Without cutplanes to render section caps\n      Instancing: 0x02, // Using instancing\n      UnpackedNormals: 0x04, // Shape encodes normals as plain vec3\n      Count: 0x08 };\n\n\n    // create special-case material variants\n    var variants = [];\n    variants[0] = null; // index 0 = null (=use default depthMaterial)\n    for (var i = 1; i < DepthMaterialFlags.Count; i++) {\n      var variant = _depthMaterial.clone();\n\n      // Packed normals are LMV-specific, so they are missed by the THREE clone-function\n      variant.packedNormals = _depthMaterial.packedNormals;\n\n      // cutplanes: with/without\n      if (i & DepthMaterialFlags.NoCutPlanes) {\n        variant.cutPlanes = null;\n        variant.doNotCut = true; // make sure that cutplanes keep null (see MaterialManager.addMaterialNonHDR)\n      }\n\n      // instancing yes/no\n      if (i & DepthMaterialFlags.Instancing) {\n        variant.useInstancing = true;\n      }\n\n      // packed normals yes/no\n      if (i & DepthMaterialFlags.UnpackedNormals) {\n        variant.packedNormals = false;\n      }\n\n      variants[i] = variant;\n    }\n\n    _depthMaterial.variants = variants;\n\n    // Define a custom override function: It decides for a shape\n    // which depthMaterial variant will be used by WebGLRenderer.\n    _depthMaterial.getCustomOverrideMaterial = function (shapeMaterial) {\n\n      // If the original shape material has no cutplanes, use the alternative\n      // _noCutplanesMaterial for normal/depth.\n      var noCutPlanes = !shapeMaterial || !shapeMaterial.cutplanes || shapeMaterial.cutplanes.length == 0;\n\n      // If the original material applies the instance transform, depthMaterial must do this as well.\n      var instanced = shapeMaterial.useInstancing;\n\n      // If original material doesn't use packed normals (as LMV does by default), switch it off for the depthMaterial as well\n      var unpackedNormals = !shapeMaterial.packedNormals;\n\n      // return the appropriate material variant\n      var index =\n      (noCutPlanes ? DepthMaterialFlags.NoCutPlanes : 0) | (\n      instanced ? DepthMaterialFlags.Instancing : 0) | (\n      unpackedNormals ? DepthMaterialFlags.UnpackedNormals : 0);\n      return this.variants[index];\n    };\n  }\n\n  function createEdgeMaterial() {\n    // create main/default override material first\n    var edgeShader = EdgeShader;\n    _edgeMaterial = createShaderMaterial(edgeShader);\n    _edgeMaterial.depthWrite = true;\n    _edgeMaterial.depthTest = true;\n    _edgeMaterial.isEdgeMaterial = true;\n    _edgeMaterial.transparent = true;\n    _edgeMaterial.blending = THREE.NormalBlending;\n    _edgeMaterial.supportsMrtNormals = true;\n\n    // Flags to define alternative edge material variants.\n    var EdgeMaterialFlags = {\n      Instancing: 0x1, // Using instancing\n      DoNotCut: 0x2,\n      Count: 4 };\n\n\n    // create special-case material variants\n    var variants = [];\n    variants[0] = null; // index 0 = null (=use default edgeMaterial)\n    for (var i = 1; i < EdgeMaterialFlags.Count; i++) {\n      var variant = _edgeMaterial.clone();\n\n      //Have to clone this manually, otherwise it's shared between the clones\n      variant.defines = ObjectAssign({}, _edgeMaterial.defines);\n\n      variant.isEdgeMaterial = true;\n      variant.supportsMrtNormals = true;\n\n      // instancing yes/no\n      if (i & EdgeMaterialFlags.Instancing) {\n        variant.useInstancing = true;\n      }\n\n      if (i & EdgeMaterialFlags.DoNotCut) {\n        variant.doNotCut = true;\n        variant.cutplanes = [];\n      }\n\n      variants[i] = variant;\n    }\n\n    _edgeMaterial.variants = variants;\n\n    // Define a custom override function: It decides for a shape\n    // which depthMaterial variant will be used by WebGLRenderer.\n    _edgeMaterial.getCustomOverrideMaterial = function (shapeMaterial) {\n\n      // If the original material applies the instance transform, depthMaterial must do this as well.\n      var instanced = shapeMaterial.useInstancing;\n\n      // return the appropriate material variant\n      var index = instanced ? EdgeMaterialFlags.Instancing : 0;\n\n      if (shapeMaterial.doNotCut) {\n        index = index | EdgeMaterialFlags.DoNotCut;\n      }\n\n      var mat = this.variants[index] || _edgeMaterial;\n\n      //Unlike depth test settings, we need to change uniforms on the material variant\n      //for them to take effect\n      if (_isRenderingOverlays) {\n        if (_isRenderingHidden) {\n          mat.uniforms.color.value.copy(_edgeColorHighlightUnder);\n        } else {\n          mat.uniforms.color.value.copy(_edgeColorHighlight);\n        }\n      } else {\n        mat.uniforms.color.value.copy(_edgeColor);\n      }\n\n      // Standard model materials usually use the default edge opacity.\n      // But we allow custom shapes to override it.\n      if (shapeMaterial.edgeOpacity !== undefined) {\n        mat.uniforms.color.value.w = shapeMaterial.edgeOpacity;\n      }\n\n      mat.uniforms.color.needsUpdate = true;\n\n      return mat;\n    };\n  }\n\n  this.setDepthMaterialOffset = function (on, factor, units) {\n    var cb = function cb(mat) {\n      mat.polygonOffset = on;\n      mat.polygonOffsetFactor = factor;\n      mat.polygonOffsetUnits = units;\n      if (mat.extraDepthOffset) {\n        mat.polygonOffsetFactor += mat.extraDepthOffset;\n      }\n      mat.needsUpdate = true;\n    };\n    forEachDepthMaterial(cb);\n  };\n\n  // Calls the cb for all depth material variants (including default)\n  function forEachDepthMaterial(cb) {\n    cb(_depthMaterial);\n    for (var i = 1; i < _depthMaterial.variants.length; i++) {\n      cb(_depthMaterial.variants[i]);\n    }\n  }\n\n  function setNoDepthNoBlend(pass) {\n    pass.material.blending = THREE.NoBlending;\n    pass.material.depthWrite = false;\n    pass.material.depthTest = false;\n  }\n\n  /**\n     * Export to renderContextPostShadingExtension\n     */\n  this.setNoDepthNoBlend = setNoDepthNoBlend;\n\n  function createRenderPasses() {\n    createDepthMaterial();\n    createEdgeMaterial();\n\n    _saoPass = new ShaderPass(SAOShader);\n    setNoDepthNoBlend(_saoPass);\n\n    _saoBlurPass = new ShaderPass(SAOBlurShader);\n    setNoDepthNoBlend(_saoBlurPass);\n\n    _saoMipFirstPass = new ShaderPass(SAOMinifyFirstShader);\n    setNoDepthNoBlend(_saoMipFirstPass);\n\n    _saoMipPass = new ShaderPass(SAOMinifyShader);\n    setNoDepthNoBlend(_saoMipPass);\n\n    _fxaaPass = new ShaderPass(FXAAShader);\n    setNoDepthNoBlend(_fxaaPass);\n\n    _blendPass = new ShaderPass(BlendShader);\n    setNoDepthNoBlend(_blendPass);\n\n    _clearPass = new ShaderPass(BackgroundShader);\n    setNoDepthNoBlend(_clearPass);\n\n    _copyPass = new ShaderPass(CopyShader);\n    setNoDepthNoBlend(_copyPass);\n  }\n\n  /**\n     * Returns true if render target with given name is used by at least one rendering component or effect.\n     * @param {Number} targetName - Render target name (see RenderTargets for complete list)\n     */\n  function isRenderTargetUsed(targetName) {\n    switch (targetName) {\n      case RenderTargets.Color:return true;\n      case RenderTargets.Depth:return _depthTargetSupported && (_settings.sao || _postShadingManager.isPostProcShaded());\n      case RenderTargets.ModelId:return _settings.idbuffer;\n      case RenderTargets.Overlay:return true;\n      case RenderTargets.SSAO:return _settings.sao;\n      case RenderTargets.Post1:return _settings.antialias || _settings.sao || _settings.customPresentPass || _postShadingManager.isPostProcShaded();\n      case RenderTargets.Post2:return _postShadingManager.isPostProcShaded() || _settings.customPresentPass;\n      case RenderTargets.PostDisplay:return _settings.antialias && _postShadingManager.isPostProcShaded(); // we assume blending is available.\n    }\n  }\n\n  function createIdTarget(ww, hh) {\n    var target = new THREE.WebGLRenderTarget(ww, hh,\n    { minFilter: THREE.NearestFilter,\n      magFilter: THREE.NearestFilter,\n      format: THREE.RGBAFormat,\n      type: THREE.UnsignedByteType,\n      stencilBuffer: false });\n\n    target.generateMipmaps = false;\n    target.shareDepthFrom = _colorTarget;\n\n    //Set this flag to avoid checking frame buffer status every time we read\n    //a pixel from the ID buffer. We know the ID target is compatible with readPixels.\n    target.canReadPixels = true;\n\n    return target;\n  }\n\n  function cubicBezier(p, t) {\n    //var cx = 3.0 * p[0];\n    //var bx = 3.0 * (p[2] - p[0]) - cx;\n    //var ax = 1.0 - cx -bx;\n    var cy = 3.0 * p[1];\n    var by = 3.0 * (p[3] - p[1]) - cy;\n    var ay = 1.0 - cy - by;\n\n    //return ((ax * t + bx) * t + cx) * t;\n    return ((ay * t + by) * t + cy) * t;\n  }\n\n  // Fades the overlay update in over time.\n  // For rollover highlighting, which increases in effect as you wait.\n  this.overlayUpdate = function () {\n\n    if (_lastHighlightId === 0 || _lastHighlightId === -1)\n    return false;\n\n    var old = _blendPass.uniforms.highlightIntensity.value;\n\n    var current = 1.0;\n    if (_rollOverFadeEnabled) {\n      // Multiply number of milliseconds that has elapsed by the\n      // speed, 1/milliseconds, the time the transition should take.\n      // So if _easeSpeed is, say, 1/1000, the transition takes a second;\n      // 2/1000 is half a second, etc.\n      var t = (performance.now() - _lastObjTime) * _easeSpeed;\n      t = Math.min(t, 1.0);\n\n      // not a linear transition; use a cubic Bezier curve to ease in and out\n      current = cubicBezier(_easeCurve, t);\n    }\n\n    // if intensity value has changed, update the shader's uniform\n    if (old != current) {\n      _blendPass.uniforms.highlightIntensity.value = current;\n      return true;\n    }\n\n    return false;\n  };\n\n  // Enable/Disable smooth fading of roll-over highlight intensity.\n  this.setRollOverFadeEnabled = function (enabled) {\n    _rollOverFadeEnabled = enabled;\n  };\n\n  // clear the color target and other targets, as needed\n  this.beginScene = function (prototypeScene, camera, customLights, needClear) {\n    _camera = camera;\n    _fog = prototypeScene.fog;\n    _lights = customLights;\n    _saoBufferValid = false;\n    _lastIDValid = false;\n\n    if (!_colorTarget && _w) {\n      this.initPostPipeline(_settings.sao, _settings.antialias);\n    } else if (!_colorTarget && !_w) {\n      if (!_warnedLeak && !isNodeJS()) {\n        logger.error(\"Rendering to a canvas that was resized to zero. If you see this message you may be accidentally leaking a viewer instance.\", errorCodeString(ErrorCodes.VIEWER_INTERNAL_ERROR));\n        _warnedLeak = true;\n      }\n      return;\n    }\n\n    //We need to render once with the \"prototype\" scene which\n    //only contains the cameras and lights, so that their positions\n    //and transforms get updated to the latest camera. Hence the\n    //call to render instead of just clear.\n\n\n    //Clear the color target\n    if (needClear) {\n\n      // Ignore envMapBg flag until envMap is actually available. \n      var useEnvMapBg = _settings.envMapBg && !!_clearPass.material.envMap;\n\n      if (_clearColor && !useEnvMapBg) {\n        _renderer.setClearColor(_clearColor, _clearAlpha);\n        _renderer.clearTarget(_colorTarget, true, true, false); //clear color and depth buffer\n      } else {\n\n        _clearPass.uniforms['uCamDir'].value = _camera.worldUpTransform ? _camera.getWorldDirection().clone().applyMatrix4(_camera.worldUpTransform) : _camera.getWorldDirection();\n        _clearPass.uniforms['uCamUp'].value = _camera.worldUpTransform ? _camera.up.clone().applyMatrix4(_camera.worldUpTransform) : _camera.up;\n        _clearPass.uniforms['uResolution'].value.set(_w, _h);\n        _clearPass.uniforms['uHalfFovTan'].value = Math.tan(THREE.Math.degToRad(_camera.fov * 0.5));\n        _clearPass.uniforms['opacity'].value = _clearAlpha;\n\n        _renderer.clearTarget(_colorTarget, false, true, false); //clear depth buffer\n        _clearPass.render(_renderer, _colorTarget, null); //clear the color buffer\n      }\n\n      if (_crossFade) {\n        _crossFade.clearTarget(_renderer);\n      }\n\n      //Clear the id buffer(s)\n      for (var i = 0; i < _idTargets.length; i++) {\n        _renderer.setClearColor(_white, 1.0);\n        _renderer.clearTarget(_idTargets[i], true, false, false);\n      }\n    }\n\n    //Clear the G-buffer target if needed and update the SSAO uniforms.\n    if (isRenderTargetUsed(RenderTargets.Depth)) {\n\n      if (needClear) {\n        _renderer.setClearColor(_black, 0.0);\n        //Skip clearing the depth buffer as it's shared with the color target\n        _renderer.clearTarget(_depthTarget, true, false, false);\n      }\n\n      var near = camera.near;\n      var far = camera.far;\n\n      _saoPass.uniforms['cameraNear'].value = near;\n      _saoPass.uniforms['cameraFar'].value = far;\n      _saoMipFirstPass.uniforms['cameraNear'].value = near;\n      _saoMipFirstPass.uniforms['cameraInvNearFar'].value = 1.0 / (near - far);\n\n      var P = camera.projectionMatrix.elements;\n\n      //Scaling factor needed to increase contrast of our SSAO.\n      if (camera.isPerspective) {\n        /*  vec4(-2.0f / (width*P[0][0]),\n                                  -2.0f / (height*P[1][1]),\n                                  ( 1.0f - P[0][2]) / P[0][0],\n                                  ( 1.0f + P[1][2]) / P[1][1])*/\n        _saoPass.uniforms['projInfo'].value.set(\n        -2.0 / (_colorTarget.width * P[0]),\n        -2.0 / (_colorTarget.height * P[5]),\n        (1.0 - P[8]) / P[0],\n        (1.0 + P[9]) / P[5]); //TODO: Not certain if we need + or - here for OpenGL off-center matrix (original is DX-style)\n        //would have to verify if some day we have off-center projections.\n      } else {\n        _saoPass.uniforms['projInfo'].value.set(\n        -2.0 / (_colorTarget.width * P[0]),\n        -2.0 / (_colorTarget.height * P[5]),\n        (1.0 - P[12]) / P[0],\n        (1.0 - P[13]) / P[5]);\n      }\n      _blendPass.uniforms['projInfo'].value.copy(_saoPass.uniforms['projInfo'].value);\n\n      var isOrtho = camera.isPerspective ? 0.0 : 1.0;\n      _saoPass.uniforms['isOrtho'].value = isOrtho;\n      _blendPass.uniforms['isOrtho'].value = isOrtho;\n\n      var hack_scale = 0.25;\n      _saoPass.uniforms['projScale'].value = hack_scale * 0.5 * (_colorTarget.height * P[5]);\n\n      // an approximation of the size of the world; relies on the camera's near and far being reasonable.\n      // This is not a great solution, as orbiting changes this number. Better would be the length of\n      // the diagonal of the whole world, or perhaps the *shortest* dimension (so that cities get SAO).\n      // This method is variable on the camera's view. Better is to do this in Viewer3dImpl.addModel,\n      // which is where we do this now.\n      //this.setAOOptions( 0.05*(camera.far-camera.near) );\n\n      // let blend-pass know the world-matrix used for scene rendering. This is used to\n      // reproduce world-positions from screen-space using the depth texture.\n      _blendPass.uniforms['worldMatrix_mainPass'].value = camera.matrixWorld;\n\n      // Update postShadingManager with relevant uniforms.\n      if (_postShadingManager.isPostProcShaded()) {\n        var focalLength = Autodesk.Viewing.Navigation.prototype.fov2fl(camera.fov);\n\n        _postShadingManager.updateUniformValue(\"focalLength\", focalLength);\n        _postShadingManager.updateUniformValue(\"unitScale\", _unitScale);\n        _postShadingManager.updateUniformValue(\"worldMatrix_mainPass\", camera.matrixWorld, true);\n        _postShadingManager.updateUniformValue(\"cameraPos\", camera.position, true);\n        _postShadingManager.updateUniformValue(\"cameraNear\", near);\n        _postShadingManager.updateUniformValue(\"cameraFar\", far);\n        _postShadingManager.updateUniformValue('projInfo', _saoPass.uniforms['projInfo'].value, true);\n        _postShadingManager.updateUniformValue(\"isOrtho\", isOrtho);\n      }\n    }\n\n    if (!_settings.sao)\n    {\n      // Ensure that any previous SSAO computation post-process target is not blended in.\n      // This looks redundant with computeSSAO()'s code setting this blend off. However, it's\n      // possible for computeSSAO() to not be executed if (a) smooth navigation and AO are both on\n      // and (b) the scene is moving. In that case, smooth navigation turns off AO entirely in\n      // Viewer3DImpl.js and computSSAO() is never called at all.\n      _blendPass.uniforms['useAO'].value = 0;\n    }\n\n    // Render the prototype/pre-model scene, which may also contain some user added custom geometry.\n    // The key bit here is the \"updateLights\" true flag, which updates the lights for the scene; this is the\n    // only place this flag is passed in as true.\n    this.renderScenePart(prototypeScene, true, true, true, true);\n  };\n\n  // Called incrementally by the scene traversal, potentially\n  // across several frames.\n  this.renderScenePart = function (scene, want_colorTarget, want_saoTarget, want_idTarget, updateLights) {\n\n    if (typeof scene.skipColorTarget !== \"undefined\") {\n      want_colorTarget = !scene.skipColorTarget;\n    }\n    if (typeof scene.skipDepthTarget !== \"undefined\") {\n      want_saoTarget = !scene.skipDepthTarget;\n    }\n    if (typeof scene.skipIdTarget !== \"undefined\") {\n      want_idTarget = !scene.skipIdTarget;\n    }\n\n    if (want_colorTarget && _settings.renderEdges) {\n      scene.edgeMaterial = _edgeMaterial;\n    }\n\n    var renderSAO = want_saoTarget && isRenderTargetUsed(RenderTargets.Depth);\n\n    // determine to which color target we render\n    var colorTarget = _colorTarget;\n    var depthTarget = _depthTarget;\n\n    // Only relevant if a separate depth-pass is used. By default, we don't need to write zBuffer in the depth pass,\n    // because this already happened in the color pass.\n    var depthWriteToZbuffer = false;\n\n    if (_crossFade) {\n      // Render to fading-target if specified for this model\n      colorTarget = _crossFade.chooseColorTarget(scene, colorTarget);\n\n      // Exclude model from SAO if it is on a low-opacity target.\n      // Note that we cannot modify renderSAO dynamically, because this would\n      // require some shader recompile work.\n      depthTarget = _crossFade.getRenderSao(scene) ? _depthTarget : null;\n\n      // A crossFade target may have its own zBuffer, so that it is not shared with _depthTarget anymore\n      depthWriteToZbuffer = depthTarget && _depthTarget.shareDepthFrom !== colorTarget;\n    }\n\n    //console.time(\"renderScenePart\");\n    _saoBufferValid = false;\n    _lastIDValid = false;\n    var lights = updateLights ? _lights : undefined;\n    //update scene with stored _fog shared from prototypeScene fog.\n    scene.fog = _fog;\n\n    //Three possibilities here -- MRT fully supported (Mac OS or native GL backends on Windows).\n    //MRT supported only for targets that have exactly equal number of bitplanes and bpp (ANGLE on Windows)\n    //MRT not supported at all. (Not sure --> some mobile platforms?).\n    var colorTargetsUsed;\n    var oldMat;\n    if (_mrtFloat32Works && _mrtRGBA8Works) {\n      //You lucky dog! Fast code path for you.\n\n      //In case of MRT, we ignore the which target flags, because\n      //we assume the shaders are set up to write to the multiple targets anyway.\n      //NOP: except idTarget, since hidden pass doesn't want that\n      if (isRenderTargetUsed(RenderTargets.ModelId) && want_idTarget && renderSAO) {\n        colorTargetsUsed = [colorTarget, depthTarget].concat(_idTargets);\n      } else\n      if (renderSAO) {\n        colorTargetsUsed = [colorTarget, depthTarget];\n      } else\n      if (isRenderTargetUsed(RenderTargets.ModelId) && want_idTarget) {\n        colorTargetsUsed = [colorTarget].concat(_idTargets);\n      } else\n        /*if (_settings.antialias)*/{\n          colorTargetsUsed = colorTarget;\n        }\n\n      _renderer.render(scene, _camera, colorTargetsUsed, false, lights);\n\n    } else if (_mrtRGBA8Works) {\n      //It's something...\n\n      if (isRenderTargetUsed(RenderTargets.ModelId) && want_idTarget) {\n        colorTargetsUsed = [colorTarget].concat(_idTargets);\n      } else\n        /*if (_settings.antialias)*/{\n          colorTargetsUsed = colorTarget;\n        }\n\n      _renderer.render(scene, _camera, colorTargetsUsed, false, lights);\n\n      // Float target has to be rendered separately in case we can't\n      // bind MRT with different bpp targets.\n      // We do not render transparent objects to the depth target, which is currently used only for ambient shadows.\n      // This is the same as sortObjects === true.\n      // If we someday do render to depth target for other things, such as a good near, we will need to perhaps do\n      // a separate pass to get the near, rendering all objects. (We'll have a good \"far\", since transparent objects will be off.)\n      if (renderSAO && !scene.sortObjects && depthTarget) {\n\n        //Render the depth pass\n        oldMat = scene.overrideMaterial;\n\n        scene.overrideMaterial = _depthMaterial;\n\n        // If color or ID target was written, then the z-buffer is established and we don't need to write to it any more.\n        // NOTE: until cutouts are dealt with properly by the depth material, there will still be mismatches.\n        // If the color buffer already wrote to the z-buffer, don't write to it. This saves memory accesses\n        // and more importantly means that the depth material doesn't need to take account of any cutout materials,\n        // as now only the color pass will write to the hardware z-buffer, and that pass does it right.\n        if (_depthMaterial.depthWrite !== depthWriteToZbuffer) {\n          setDepthWriteEnabled(_depthMaterial, depthWriteToZbuffer);\n        }\n\n        _renderer.render(scene, _camera, depthTarget, false);\n\n        scene.overrideMaterial = oldMat;\n      }\n\n    } else {\n\n      //Poor sod. No MRT at all. Three passes.\n\n      // Render the color target first -- actually this is slower\n      // because the color shader is likely a lot slower than the\n      // depth+normal shader, but if we render depth first, then\n      // we lose stuff behind transparent objects (potentially).\n      // So we cannot do this until the progressive render is split\n      // into non-transparent and transparent worlds.\n\n      // see if depth target needs to write to z-buffer, not just read it\n      if (want_colorTarget) {\n        colorTargetsUsed = colorTarget;\n        _renderer.render(scene, _camera, colorTarget, false, lights);\n      } else {\n        // This branch will never be hit with the current code - the color target\n        // is always generated. But, future-proofing.\n        depthWriteToZbuffer = true;\n      }\n\n      // TODO: In 3D we really don't want to get into\n      // this situation -- we don't have a reasonable ID material that\n      // will work for e.g. cutout maps. We have to run basically a full\n      // shader, or at least one that support opacity and alpha map checks.\n      if (isRenderTargetUsed(RenderTargets.ModelId) && want_idTarget) {\n\n        // TODO: the ID buffer should also probably not write to the z-buffer if the\n        // color target already has. The _idMaterial should be adjusted. The bug that may\n        // occur without this fixed is that objects with cutouts may instead fully cover\n        // areas they should not. See LMV-2375.\n        // Also, if the color buffer is *not* rendered, then the id buffer should use a special\n        // material to represent cutout materials, so cutouts are treated properly and block only\n        // the areas they truly cover.\n        if (_idMaterial) {\n          oldMat = scene.overrideMaterial;\n          scene.overrideMaterial = _idMaterial;\n          //TODO: This code path does not work in case multiple id targets are attached\n          //We need a second ID material that renders modelId instead of dbId.\n          _renderer.render(scene, _camera, _idTargets[0], false);\n          scene.overrideMaterial = oldMat;\n        } else {\n          _renderer.setProgramPrefix(1, \"#define ID_COLOR\", \"#define ID_COLOR\");\n          //TODO: This code path does not work in case multiple id targets are attached\n          //We need a second ID material that renders modelId instead of dbId.\n          _renderer.render(scene, _camera, _idTargets[0], false);\n          _renderer.setProgramPrefix(0, \"\", \"\");\n        }\n        depthWriteToZbuffer = false;\n      }\n\n      // We do not render transparent objects to the depth target, which is currently used only for ambient shadows.\n      // This is the same as sortObjects === true.\n      // If we someday do render to depth target for other things, such as a good near, we will need to perhaps do\n      // a separate pass to get the near, rendering all objects. (We'll have a good \"far\", since transparent objects will be off.)\n      if (renderSAO && !scene.sortObjects && depthTarget) {\n\n        //Render the depth pass\n        oldMat = scene.overrideMaterial;\n\n        // If color or ID target was written, then the z-buffer is established and we don't need to write to it any more.\n        // NOTE: until cutouts are dealt with properly by the depth material, there will still be mismatches.\n        // If the color buffer already wrote to the z-buffer, don't write to it. This saves memory accesses\n        // and more importantly means that the depth material doesn't need to take account of any cutout materials,\n        // as now only the color pass will write to the hardware z-buffer, and that pass does it right.\n        if (_depthMaterial.depthWrite !== depthWriteToZbuffer) {\n          // set depth write state as needed\n          setDepthWriteEnabled(_depthMaterial, depthWriteToZbuffer);\n        }\n\n        scene.overrideMaterial = _depthMaterial;\n\n        _renderer.render(scene, _camera, depthTarget, false);\n\n        scene.overrideMaterial = oldMat;\n      }\n\n    }\n\n    scene.edgeMaterial = undefined;\n\n    // console.timeEnd(\"renderScenePart\");\n  };\n\n\n  this.clearAllOverlays = function () {\n    _renderer.clearTarget(_overlayTarget, true, false, false);\n  };\n\n  this.renderOverlays = function (overlays, lights, disableClear) {\n    var haveOverlays = 0;\n\n    _isRenderingOverlays = true;\n\n    for (var key in overlays) {\n      var p = overlays[key];\n      var s = p.scene;\n      var c = p.camera ? p.camera : _camera;\n      if (s.children.length) {\n\n        if (!haveOverlays) {\n          haveOverlays = 1;\n\n          if (!disableClear) {\n            //clear the overlay target once we see\n            //the first non-empty overlay scene\n            _renderer.setClearColor(_black, 0.0);\n            _renderer.clearTarget(_overlayTarget, true, false, false);\n          }\n        }\n\n        //NOTE: This logic renders the top side of the highlighted objects first,\n        //and then the bottom side. The reason is that the top side material is opaque,\n        //while we want to render the hidden parts of the object with faint transparency.\n        //For objects that covers themselves and are also covered by other objects\n        //this is a problem, since the opaque parts would prevent the back parts from showing.\n\n        //However, edge rendering uses painter's algorithm settings for the depth,\n        //since we don't care to show hidden edges from under top edges.\n\n        //Render top side of the object using the primary highlight material\n        if (p.materialPre) {\n          s.overrideMaterial = p.materialPre;\n        }\n        _renderer.render(s, c, _overlayTarget, false, lights);\n\n\n        if (p.materialPost) {\n          //render hidden edges\n          _isRenderingHidden = true; //flag used when getting the correct override material for the hidden pass\n          _renderer.context.depthFunc(_renderer.context.GREATER);\n\n          if (_settings.renderEdges) {\n            _edgeMaterial.depthWrite = false;\n            _edgeMaterial.depthTest = false;\n            s.overrideMaterial = _edgeMaterial;\n            _renderer.render(s, c, _overlayTarget, false);\n          }\n\n          //Render bottom side of the object\n          //for selection that's done using light transparency to show\n          //areas the object spans under other objects\n          s.overrideMaterial = p.materialPost;\n          _renderer.render(s, c, _overlayTarget, false, lights);\n\n          _renderer.context.depthFunc(_renderer.context.LEQUAL);\n          _isRenderingHidden = false;\n        }\n\n        //Render top side edges last\n        if (_settings.renderEdges && p.materialPre) {\n          _edgeMaterial.depthWrite = false;\n          _edgeMaterial.depthTest = true;\n          s.overrideMaterial = _edgeMaterial;\n          _renderer.render(s, c, _overlayTarget, false);\n        }\n\n        s.overrideMaterial = null;\n      }\n    }\n\n    //Back to normal edge mode\n    _isRenderingOverlays = false;\n    _edgeMaterial.depthWrite = true;\n    _edgeMaterial.depthTest = true;\n\n    _blendPass.uniforms['useOverlay'].value = haveOverlays;\n\n    // Update the useOverlayAlpha only if there are overlays\n    if (haveOverlays) {\n      // LMV-5528: useOverlayAlpha will update the diffuse color's alpha with the overlay alpha.\n      // By default the useOverlayAlpha is enabled.\n      _blendPass.uniforms['useOverlayAlpha'].value = _useOverlayAlpha;\n    }\n  };\n\n  // Takes color buffer, uses normal and depth buffer, puts SSAO shading into _ssaoTarget.\n  // _postTarget1 is used along the way to ping-pong and do a separable blur on the results.\n  this.computeSSAO = function (skipAOPass) {\n    if (!skipAOPass && _settings.sao) {\n\n      //console.time(\"SAO\");\n      if (!_saoBufferValid) {\n        if (_depthMipMap && _depthMipMap.length) {\n          var prevMip = _depthMipMap[0];\n          _saoMipFirstPass.uniforms['resolution'].value.set(1.0 / prevMip.width, 1.0 / prevMip.height);\n          _saoMipFirstPass.render(_renderer, prevMip, _depthTarget);\n          for (var i = 1; i < _depthMipMap.length; i++) {\n            var curMip = _depthMipMap[i];\n            _saoMipPass.uniforms['resolution'].value.set(1.0 / curMip.width, 1.0 / curMip.height);\n            _saoMipPass.render(_renderer, curMip, prevMip);\n            prevMip = curMip;\n          }\n        }\n        // compute SSAO and put in _ssaoTarget\n        _saoPass.render(_renderer, _ssaoTarget, _colorTarget);\n\n        //console.timeEnd(\"SAO\");\n        //console.time(\"SAOblur\");\n        //Do the separable blur, horizontal and vertical\n        _saoBlurPass.uniforms['axis'].value.set(1, 0);\n        _saoBlurPass.render(_renderer, _postTarget1, _ssaoTarget);\n        _saoBlurPass.uniforms['axis'].value.set(0, 1);\n        _saoBlurPass.render(_renderer, _ssaoTarget, _postTarget1);\n\n        _saoBufferValid = true;\n      }\n\n      _blendPass.uniforms['useAO'].value = 1;\n      //console.timeEnd(\"SAOblur\");\n    } else {\n      // Ensure that any previous SSAO computation post-process target is not blended in.\n      _blendPass.uniforms['useAO'].value = 0;\n    }\n\n  };\n\n  function saveOverlayAndHighlightUniforms()\n  {\n    var hold = [_blendPass.uniforms['useOverlay'].value, _blendPass.uniforms['objIDv4'].value];\n    _blendPass.uniforms['useOverlay'].value = 0;\n    _blendPass.uniforms['objIDv4'].value = new THREE.Vector4();\n    return hold;\n  }\n  function restoreOverlayAndHighlightUniforms(hold)\n  {\n    _blendPass.uniforms['useOverlay'].value = hold[0];\n    _blendPass.uniforms['objIDv4'].value = hold[1];\n  }\n  function saveSAOUniform()\n  {\n    var hold = _blendPass.uniforms['useAO'].value;\n    _blendPass.uniforms['useAO'].value = 0;\n    return hold;\n  }\n  function restoreSAOUniform(hold)\n  {\n    _blendPass.uniforms['useAO'].value = hold;\n  }\n\n  function blendAndPostProcess()\n  {\n    var outTarget = _postTarget1;\n    var inTarget = _colorTarget;\n    if (_blendPass.uniforms['useAO'].value) {\n      var hold = saveOverlayAndHighlightUniforms();\n      _blendPass.render(_renderer, outTarget, inTarget);\n      inTarget = outTarget;\n      outTarget = _postTarget2;\n      restoreOverlayAndHighlightUniforms(hold);\n    }\n\n    var tmpTarget = outTarget === _postTarget1 ? _postTarget2 : _postTarget1;\n\n    // Render post shading passes that should be rendered BEFORE overlays were rendered.\n    inTarget = _postShadingManager.render(_renderer, outTarget, inTarget, tmpTarget, false);\n    outTarget = inTarget === _postTarget1 ? _postTarget2 : _postTarget1;\n\n    if (_blendPass.uniforms['useOverlay'].value ||\n    _blendPass.uniforms['objIDv4'].value) {\n      var hold = saveSAOUniform();\n      _blendPass.render(_renderer, outTarget, inTarget);\n      inTarget = outTarget;\n      restoreSAOUniform(hold);\n    }\n\n    outTarget = inTarget === _postTarget1 ? _postTarget2 : _postTarget1;\n    tmpTarget = outTarget === _postTarget1 ? _postTarget2 : _postTarget1;\n\n    // Render post shading passes that should be rendered AFTER overlays were rendered.\n    inTarget = _postShadingManager.render(_renderer, outTarget, inTarget, tmpTarget, true);\n\n    // the inTarget is always set to the previous outTarget after a pass is done\n    return inTarget;\n  }\n\n  // Returns the final render target that presentBuffer eventually render to.\n  this.getFinalTarget = function () {\n    return _offscreenTarget || null;\n  };\n\n  // userFinalPass is used by stereo rendering, giving the context to use for where the render should be put.\n  // If no context is given, the default frame buffer is used.\n  this.presentBuffer = function (userFinalPass) {\n\n    if (!_renderer)\n    return;\n\n    // By default, finalTarget is null (= render to canvas)\n    var finalTarget = this.getFinalTarget();\n\n    // See if the blend pass is trivial 1:1, in which\n    // case we can just use the main color target for\n    // the final pass and skip the blend pass.\n    // NOTE: This needs to be adjusted if the blend pass ever\n    // does the tone mapping again.\n    // TODO: Another possible improvement is to support blending of the SAO\n    // inside the FXAA pass, in case the blend pass is just modulating by the AO value.\n    var canSkipBlendPass = !_blendPass.uniforms['useAO'].value &&\n    !_blendPass.uniforms['useOverlay'].value &&\n    !_crossFade && ( // blend pass is required for cross-fading\n    // idAtPixel can return -1 for the ID when nothing is there\n    _lastHighlightId === 0 || _lastHighlightId === -1) && (\n    _lastHighlightModelId === 0 || _lastHighlightModelId === -1);\n\n    // In this code, the following inputs cannot be written to:\n    // _colorTarget holds the current \"normal\" render.\n    // _ssaoTarget holds the SSAO results to be blended in, but can be wiped out by other modes.\n\n    // What uses what (_colorTarget is always used)\n    // Blend    Antialias   PostProc    UserPass\n    // .        .           .           .           - simple case, just copy\n    // X        .           .           .           - blend to frame buffer\n    // .        X           .           .           - fxaa to frame buffer\n    // X        X           .           .           - _postTarget1\n    // .        .           X           .           - _postTarget1\n    // X        .           X           .           - _postTarget1, _postTarget2\n    // .        X           X           .           - _postTarget1, _postTarget2\n    // X        X           X           .           - _postTarget1, _postTarget2, _postProcDisplayTarget\n    // .        .           .           X           - _postTarget1\n    // X        .           .           X           - _postTarget1, _postTarget2\n    // .        X           .           X           - _postTarget1\n    // X        X           .           X           - _postTarget1, _postTarget2\n    // .        .           X           X           - *not supported*\n    // X        .           X           X           - *not supported*\n    // .        X           X           X           - *not supported*\n    // X        X           X           X           - *not supported*\n\n    if (canSkipBlendPass) {\n      // we can use the color target for the final pass and not bother with blending in SAO or the overlay or highlighting\n\n      if (_settings.antialias) {\n        // antialiasing is on\n\n        if (userFinalPass) {\n          // post processing is currently not valid for stereo viewing TODO\n          // if (_postShadingManager.isPostProcShaded()) {\n          //     // FXAA is put in post target 1 - TODO no post processing\n          //     _fxaaPass.render(_renderer, _postTarget1, _colorTarget);\n          //     // and copied and downsized to the context's frame buffer\n          //     userFinalPass.render(_renderer, userFinalPass, _postTarget1);\n          // } else {\n          // FXAA is put in post target 1\n          _fxaaPass.render(_renderer, _postTarget1, _colorTarget);\n          // and copied to the context's frame buffer\n          userFinalPass.render(_renderer, finalTarget, _postTarget1);\n        } else {\n          if (_postShadingManager.isPostProcShaded()) {\n            // post-processing is done, then fxaa is done and copied to framebuffer\n            // bindings need to be cleared on mode change, else you get LMV-2848,\n            // warnings about input and output being the same target.\n            var _inTarget = _postShadingManager.render(_renderer, _postTarget1, _colorTarget, _postTarget2);\n            _copyPass.render(_renderer, _postProcDisplayTarget, _inTarget);\n            _fxaaPass.render(_renderer, finalTarget, _postProcDisplayTarget);\n          } else {\n            // just fxaa is needed: apply and put in frame buffer\n            _fxaaPass.render(_renderer, finalTarget, _colorTarget);\n          }\n        }\n      }\n      // no antialiasing\n      else if (userFinalPass) {\n          // just copy to given context - currently not valid to use stereo viewing\n          userFinalPass.render(_renderer, finalTarget, _colorTarget);\n        } else if (_postShadingManager.isPostProcShaded()) {\n          // post-process the color target, put results in post target 1\n          // bindings need to be cleared on mode change, else you get LMV-2848,\n          // warnings about input and output being the same target.\n          var _inTarget2 = _postShadingManager.render(_renderer, _postTarget1, _colorTarget, _postTarget2);\n          // and copy and downsize this result to the display frame buffer\n          _copyPass.render(_renderer, finalTarget, _inTarget2);\n        } else {\n          // simply copy the color target to the frame buffer\n          _copyPass.render(_renderer, finalTarget, _colorTarget);\n        }\n\n    } else {\n      // Blending of some content must be done.\n\n      //console.time(\"post\");\n      //If we have fxaa, do the blending into an offscreen target\n      //then FXAA into the final target\n      if (_settings.antialias) {\n        // antialiasing and blending\n\n        if (userFinalPass) {\n          // apply fxaa and put to given context's frame buffer - does not include post-processing TODO\n          // first blend in content in ssao target, overlay, ID, as needed, and put it in post target 1\n          _blendPass.render(_renderer, _postTarget1, _colorTarget);\n\n          _fxaaPass.render(_renderer, _postTarget2, _postTarget1);\n          userFinalPass.render(_renderer, finalTarget, _postTarget2);\n        } else if (_postShadingManager.isPostProcShaded()) {\n          // post-process and fxaa\n          // bindings need to be cleared on mode change, else you get LMV-2848,\n          // warnings about input and output being the same target.\n          // first blend in content in ssao target, overlay, ID, as needed, and put it in post target 1\n\n          var inTarget = blendAndPostProcess();\n          _copyPass.render(_renderer, _postProcDisplayTarget, inTarget);\n          _fxaaPass.render(_renderer, finalTarget, _postProcDisplayTarget);\n        } else {\n          // antialias the blended image\n          // first blend in content in ssao target, overlay, ID, as needed, and put it in post target 1\n          _blendPass.render(_renderer, _postTarget1, _colorTarget);\n          _fxaaPass.render(_renderer, finalTarget, _postTarget1);\n        }\n      } else\n      {\n        // no antialiasing, just blending\n\n        if (userFinalPass) {\n          // blend into post target 1 and copy over for output\n          _blendPass.render(_renderer, _postTarget1, _colorTarget);\n          userFinalPass.render(_renderer, finalTarget, _postTarget1);\n        } else {\n          // post-process and blend, OR just blend\n          if (_postShadingManager.isPostProcShaded()) {\n            // bindings need to be cleared on mode change, else you get LMV-2848,\n            // warnings about input and output being the same target.\n            var inTarget = blendAndPostProcess();\n            // and copy and downsize this result to the frame buffer\n            _copyPass.render(_renderer, finalTarget, inTarget);\n          } else {\n            _blendPass.render(_renderer, finalTarget, _colorTarget);\n          }\n        }\n      }\n    }\n\n  };\n\n\n  this.composeFinalFrame = function (skipAOPass, skipPresent) {\n    //Apply the post pipeline and then show to screen.\n    //Note that we must preserve the original color buffer\n    //so that we can update it progressively\n\n    // always called, so that useAO is set to 0 if not in use.\n    this.computeSSAO(skipAOPass);\n\n    if (!skipPresent)\n    this.presentBuffer();\n\n    //console.timeEnd(\"post\");\n\n  };\n\n  this.cleanup = function () {\n\n    if (_renderer) {\n      _renderer.setRenderTarget(null);\n    }\n\n    if (_colorTarget) {\n      _colorTarget.dispose();\n      _colorTarget = null;\n    }\n\n    if (_depthTarget) {\n      _depthTarget.dispose();\n      _depthTarget = null;\n    }\n\n    if (_overlayTarget) {\n      _overlayTarget.dispose();\n      _overlayTarget = null;\n    }\n\n    if (_crossFade) {\n      _crossFade.disposeTargets();\n    }\n\n    if (_postTarget1) {\n      _postTarget1.dispose();\n      _postTarget1 = null;\n    }\n\n    if (_ssaoTarget) {\n      _ssaoTarget.dispose();\n      _ssaoTarget = null;\n    }\n\n    if (_postTarget2) {\n      _postTarget2.dispose();\n      _postTarget2 = null;\n    }\n\n    if (_depthMipMap) {\n      for (var i = 0; i < _depthMipMap.length; i++) {\n        _depthMipMap[i].dispose();\n      }\n\n      _depthMipMap = [];\n    }\n\n  };\n\n  this.setSize = function (w, h, force, suppress) {\n\n    _w = w;\n    _h = h;\n\n    _settings.logicalWidth = w;\n    _settings.logicalHeight = h;\n\n    //Just a way to release the targets in cases when\n    //we use a custom render context and don't need this one\n    //temporarily\n    if (w === 0 && h === 0 || !_renderer) {\n      this.cleanup();\n      return;\n    }\n\n    var sw = 0 | w * _renderer.getPixelRatio();\n    var sh = 0 | h * _renderer.getPixelRatio();\n\n    _settings.deviceWidth = sw;\n    _settings.deviceHeight = sh;\n\n    // normally, render() calls setRenderTarget, which properly sets the size to be\n    // the correct viewport for rendering. However, setAOEnabled also calls this\n    // method, to allocate or deallocate the various SSAO buffers, etc. Because\n    // post processing can increase the size of the target by 2x (code below),\n    // we do not want to have setAOEnabled touch the renderer's setSize. Long and\n    // short, setAOEnabled sends in \"suppress\" as true. LMV-2863\n    if (!suppress) {\n      if (_isOffscreen) {\n        // only set Viewport (which can be recovered later), but do not affect WebGLCanvas\n        _renderer.setViewport(0, 0, w, h);\n      } else {\n        _renderer.setSize(w, h);\n      }\n    }\n\n    //logger.log(\"width: \" + sw + \" height: \" + sh);\n\n    var i;\n\n    var orig_sw = sw;\n    var orig_sh = sh;\n\n    // supersample antialiasing, or post-processed edges, which need a higher resolution;\n    // if a mobile device, don't scale up by 2x for post-processing, as this would take a lot of memory and may cause mobile to fail. TODO - true?\n    if (_settings.useSSAA || _postShadingManager.isPostProcShaded() && !_isWeakDevice && _renderer.getPixelRatio() <= 1 && _postShadingManager.postProcessEdgesOn()) {\n      /*\n                                                                                                                                                                          //Create a somewhat larger render target, that is power of 2 size and has mipmap\n                                                                                                                                                                          sw *= 3 / _renderer.getPixelRatio();\n                                                                                                                                                                          sh *= 3 / _renderer.getPixelRatio();\n                                                                                                                                                                           var w = 1;\n                                                                                                                                                                          while (w < sw) w *= 2;\n                                                                                                                                                                          var h = 1;\n                                                                                                                                                                          while (h < sh) h *= 2;\n                                                                                                                                                                           sw = w;\n                                                                                                                                                                          sh = h;\n                                                                                                                                                                          */\n\n\n      sw *= 2;\n      sh *= 2;\n\n      //force = true;\n    }\n\n    var resX = 1.0 / sw;\n    var resY = 1.0 / sh;\n\n    //Just the regular color target -- shares depth buffer\n    //with the depth target.\n    if (force || !_colorTarget || _colorTarget.width != sw || _colorTarget.height != sh) {\n\n      logger.log(\"Reallocating render targets.\");\n      this.cleanup();\n\n      _colorTarget = new THREE.WebGLRenderTarget(sw, sh,\n      { minFilter: THREE.LinearFilter,\n        magFilter: THREE.LinearFilter,\n        format: THREE.RGBAFormat,\n        type: _settings.useHdrTarget ? THREE.FloatType : THREE.UnsignedByteType,\n        //anisotropy: Math.min(this.getMaxAnisotropy(), 4),\n        stencilBuffer: false });\n\n      // three.js has a flaw in its constructor: the generateMipmaps value is always initialized to true\n      _colorTarget.generateMipmaps = false;\n      _colorTarget.name = \"colorTarget\";\n\n      _overlayTarget = new THREE.WebGLRenderTarget(sw, sh,\n      { minFilter: THREE.NearestFilter,\n        magFilter: THREE.NearestFilter,\n        format: THREE.RGBAFormat,\n        stencilBuffer: false });\n\n      _overlayTarget.generateMipmaps = false;\n      _overlayTarget.name = \"overlayTarget\";\n\n\n      _overlayTarget.shareDepthFrom = _colorTarget;\n\n      _depthTarget = null;\n      _postTarget1 = null;\n      _postProcDisplayTarget = null;\n      _ssaoTarget = null;\n      _postTarget2 = null;\n      _depthMipMap = [];\n    }\n\n    if (_crossFade) {\n      _crossFade.updateTargets(sw, sh, force, _settings.useHdrTarget);\n    }\n\n    if (isRenderTargetUsed(RenderTargets.Post1))\n    {\n      if (force || !_postTarget1 || _postTarget1.width != sw || _postTarget1.height != sh) {\n        //We need one extra post target if FXAA is on, so\n        //to use as intermediate from Blend->FXAA pass.\n        _postTarget1 = new THREE.WebGLRenderTarget(sw, sh,\n        {\n          minFilter: THREE.LinearFilter,\n          magFilter: THREE.LinearFilter,\n          format: THREE.RGBAFormat,\n          //anisotropy: 0,\n          //anisotropy: Math.min(this.getMaxAnisotropy(), 4),\n          stencilBuffer: false,\n          depthBuffer: false });\n\n        _postTarget1.generateMipmaps = false;\n        _postTarget1.name = \"postTarget1\";\n      }\n    }\n\n    // note that these are used only if _postTarget1 is also used, so _postTarget1 will exist\n    if (!_ssaoTarget && isRenderTargetUsed(RenderTargets.SSAO)) {\n      _ssaoTarget = _postTarget1.clone();\n      _ssaoTarget.name = \"SSAO target\";\n    }\n\n    if (!_postTarget2 && isRenderTargetUsed(RenderTargets.Post2)) {\n      _postTarget2 = _postTarget1.clone();\n      _postTarget2.name = \"post target 2\";\n    }\n\n    if (!_postProcDisplayTarget && isRenderTargetUsed(RenderTargets.PostDisplay)) {\n      // final-image sized intermediate buffer, so antialiasing can be done correctly.\n      _postProcDisplayTarget = new THREE.WebGLRenderTarget(orig_sw, orig_sh,\n      {\n        minFilter: THREE.LinearFilter,\n        magFilter: THREE.LinearFilter,\n        format: THREE.RGBAFormat,\n        //anisotropy: 0,\n        //anisotropy: Math.min(this.getMaxAnisotropy(), 4),\n        stencilBuffer: false,\n        depthBuffer: false });\n\n      _postProcDisplayTarget.generateMipmaps = false;\n      _postProcDisplayTarget.name = \"postTargetNormal\";\n    }\n\n    if (isRenderTargetUsed(RenderTargets.Depth)) {\n      if (force || !_depthTarget || _depthTarget.width != sw || _depthTarget.height != sh) {\n\n        _depthTarget = createDepthTarget(sw, sh, _depthTargetFormat, _depthTargetType, _colorTarget);\n\n        //SSAO depth/normals mip maps. Those are \"manually\" created\n        //because we use custom sampling. Also, they are separately bound into\n        //the shader because there doesn't seem to be an easy way to load them\n        //as mip levels of the same texture, in the case they were render buffers initially.\n        _depthMipMap = [];\n        for (var j = 0; j < 5; j++) {\n          var mipWidth = 0 | sw / (2 << j);\n          var mipHeight = 0 | sh / (2 << j);\n          var mipValid = mipWidth >= 1 && mipHeight >= 1;\n          var mip = null;\n\n          if (mipValid) {\n            mip = new THREE.WebGLRenderTarget(mipWidth, mipHeight,\n            { minFilter: THREE.NearestFilter,\n              magFilter: THREE.NearestFilter,\n              format: THREE.RGBAFormat,\n              //type:THREE.FloatType,\n              depthBuffer: false,\n              stencilBuffer: false });\n            mip.generateMipmaps = false;\n            _depthMipMap.push(mip);\n          }\n\n          // Always reset uniforms for all mipmaps - even if skip some. This avoids leaking disposed old ones.\n          _saoPass.uniforms['tDepth_mip' + (j + 1)].value = mip;\n        }\n\n        //Re-check this when render targets change\n        _mrtFloat32Works = _renderer.verifyMRTWorks([_colorTarget, _depthTarget]);\n      }\n\n      _saoPass.uniforms['size'].value.set(sw, sh);\n      _saoPass.uniforms['resolution'].value.set(resX, resY);\n      _saoPass.uniforms['tDepth'].value = _depthTarget;\n\n      _saoBlurPass.uniforms['size'].value.set(sw, sh);\n      _saoBlurPass.uniforms['resolution'].value.set(resX, resY);\n\n      _postShadingManager.updateUniformValue('tDepth', _depthTarget);\n      _blendPass.uniforms['tDepth'].value = _depthTarget;\n\n    }\n\n    if (isRenderTargetUsed(RenderTargets.ModelId)) {\n      if (force || !_idTargets[0] ||\n      _idTargets[0].width != sw || _idTargets[0].height != sh) {\n        for (i = 0; i < _idTargets.length; i++) {\n          _idTargets[i] && _idTargets[i].dispose();\n        }\n        _idTargets = [];\n        for (i = 0; i < _settings.numIdTargets; i++) {\n          var target = createIdTarget(sw, sh);\n          target.name = \"id \" + i;\n          _idTargets.push(target);\n        }\n\n        //Re-check this when render targets change\n        _mrtRGBA8Works = _renderer.verifyMRTWorks([_colorTarget].concat(_idTargets));\n        if (!_mrtRGBA8Works) {\n          logger.warn(\"ID buffer requested, but MRT is not supported. Some features will not work.\");\n        }\n\n      }\n\n      _postShadingManager.updateUniformValue('tID', _idTargets[0]);\n\n    } else if (_idTargets[0]) {\n      for (i = 0; i < _idTargets.length; i++) {\n        _idTargets[i].dispose();\n        _idTargets[i] = null;\n      }\n      // make sure no _idTargets are defined, since they've been released. LMV-2691\n      _idTargets.length = 0;\n    }\n\n\n    _fxaaPass.uniforms['uResolution'].value.set(resX, resY);\n    _postShadingManager.changeResolution(resX, resY);\n\n    _blendPass.uniforms['tOverlay'].value = _overlayTarget;\n    _blendPass.uniforms['tAO'].value = _ssaoTarget;\n    _blendPass.uniforms['useAO'].value = _settings.sao ? 1 : 0;\n    _blendPass.uniforms['resolution'].value.set(resX, resY);\n    _blendPass.uniforms['tID'].value = _idTargets[0] || null;\n    _blendPass.uniforms['tID2'].value = _idTargets[1] || null;\n\n    if (_crossFade) {\n      _crossFade.updateBlendPass();\n    }\n  };\n\n\n\n  this.getMaxAnisotropy = function () {\n    return _renderer ? _renderer.getMaxAnisotropy() : 0;\n  };\n\n  // HACK: returns MRT flags required by this render context\n  // so that the flags can be passed to the material manager\n  this.mrtFlags = function () {\n    return {\n      mrtNormals: _mrtFloat32Works && isRenderTargetUsed(RenderTargets.Depth),\n      mrtIdBuffer: _mrtRGBA8Works && isRenderTargetUsed(RenderTargets.ModelId) ? _settings.numIdTargets : undefined };\n\n  };\n\n\n  /**\n      * Adds/Removes and id frame buffer.\n      * Supports only 1 or 2 framebuffers. Default is 1.\n      * \n      * @param {Number} value - id targets. Accepts only values 1 or 2. Default is 1.\n      */\n  this.setIdTargetCount = function (value) {\n    if (value > 2 || value < 1) return;\n    if (value === _settings.numIdTargets) return;\n\n    _settings.numIdTargets = value;\n    if (_idTargets.length === 0)\n    return;\n\n    //\n    // Disabled because there is no real benefit.\n    //\n    //if (value === 1 && _idTargets.length.length === 2) {\n    //    // Remove the model id target\n    //    _idTargets[1].dispose();\n    //    _idTargets[1] = null;\n    //    _idTargets.length = 1;\n    //    _blendPass.uniforms[ 'tID2' ].value = null;\n    //    delete _blendPass.material.defines.USE_MODEL_ID;\n    //    _blendPass.material.needsUpdate = true;\n    //    return true;\n    //};\n\n\n    if (value === 2 && _idTargets.length === 1) {\n      // Add the model id target\n      var sw = _idTargets[0].width;\n      var sh = _idTargets[0].height;\n      var newTarget = createIdTarget(sw, sh);\n      newTarget.name = \"id \" + _idTargets.length;\n      _idTargets.push(newTarget);\n      _blendPass.uniforms['tID2'].value = newTarget;\n      _blendPass.material.defines.USE_MODEL_ID = \"1\";\n      _blendPass.material.needsUpdate = true;\n      return true;\n    }\n  };\n\n  this.getAntialiasing = function () {\n    return _settings.antialias;\n  };\n\n  this.initPostPipeline = function (useSAO, useFXAA) {\n\n    //TODO: Do we want to move the IE check to higher level code?\n    _settings.sao = useSAO && !isIE11 && _depthTargetSupported;\n    _settings.antialias = useFXAA && !isIE11;\n\n    if (_settings.haveTwoSided) {\n      forEachDepthMaterial(function (mat) {\n        mat.side = THREE.DoubleSide;\n      });\n    }\n\n    //TODO: do we really need to update all these or just the depthMaterial?\n    forEachDepthMaterial(function (mat) {\n      mat.needsUpdate = true;\n    });\n    _saoPass.material.needsUpdate = true;\n    _saoBlurPass.material.needsUpdate = true;\n    _saoMipFirstPass.material.needsUpdate = true;\n    _saoMipPass.material.needsUpdate = true;\n    _fxaaPass.material.needsUpdate = true;\n    _postShadingManager.setMaterialNeedsUpdate();\n    _blendPass.material.needsUpdate = true;\n    _clearPass.material.needsUpdate = true;\n    _copyPass.material.needsUpdate = true;\n\n    //Also reallocate the render targets\n    this.setSize(_w, _h);\n  };\n\n  this.setClearColors = function (colorTop, colorBot) {\n    if (!colorBot) {\n      _clearColor = colorTop.clone();\n    }\n    //If the gradient is trivial, we can use a simple clear instead.\n    else if (colorTop.equals(colorBot) || _isWeakDevice) {\n        _clearColor = new THREE.Color(\n        0.5 * (colorTop.x + colorBot.x),\n        0.5 * (colorTop.y + colorBot.y),\n        0.5 * (colorTop.z + colorBot.z));\n      } else {\n        _clearColor = undefined;\n      }\n\n    if (!_clearColor) {\n      _clearPass.uniforms.color1.value.copy(colorTop);\n      _clearPass.uniforms.color2.value.copy(colorBot);\n    }\n  };\n\n  /**\n      * Turn on or off the use of the overlay alpha when computing the diffuse color's alpha\n      * @param {Boolean} value - true to enable, false to disable.\n      */\n  this.useOverlayAlpha = function (value) {\n    _useOverlayAlpha = value;\n  };\n\n  this.setClearAlpha = function (alpha) {\n    _clearAlpha = alpha;\n  };\n\n  this.setAOEnabled = function (enabled) {\n    _settings.sao = enabled && _depthTargetSupported;\n    _oldSettings.sao = _settings.sao;\n    // recreate required buffers when sao is turned on; do not reset rendering size\n    this.setSize(_w, _h, false, true);\n  };\n\n  this.setAOOptions = function (radius, intensity, opacity) {\n\n    if (radius !== undefined) {\n      _saoPass.uniforms['radius'].value = radius;\n\n      // It is questionable whether this \"isMobileDevice()\" test should be here.\n      // The shader bias is a world distance, not a screen distance. Still, it\n      // may fight some precision problem on mobile. The whole radius/bias system\n      // is pretty kludgey.\n      _saoPass.uniforms['bias'].value = isMobileDevice() ? 0.1 : 0.01;\n      // more theoretically sound, but isMobileDevice() is still a little questionable:\n      //_saoPass.uniforms[ 'bias' ].value = radius * (isMobileDevice() ? 0.1 : 0.01);\n      _saoBlurPass.uniforms['radius'].value = radius;\n    }\n    if (intensity !== undefined) {\n      _saoPass.uniforms['intensity'].value = intensity;\n    }\n    //Opacity handles undefined differently (it uses default if undefined given)\n    //until all user-facing calls to setAOOptions can handle the new opacity setting.\n    if (opacity !== undefined) {\n      _blendPass.uniforms['aoOpacity'].value = opacity;\n    } else {\n      _blendPass.uniforms['aoOpacity'].value = 1.0;\n    }\n    _saoBufferValid = false;\n  };\n\n  this.getAOEnabled = function () {\n    return _settings.sao;\n  };\n\n  this.getAORadius = function () {\n    return _saoPass.uniforms['radius'].value;\n  };\n\n  this.getAOIntensity = function () {\n    return _saoPass.uniforms['intensity'].value;\n  };\n\n  this.setCubeMap = function (map) {\n    _clearPass.material.envMap = map;\n    if (!map)\n    this.toggleEnvMapBackground(false);\n\n    // If we delayed envMap activation in a prior toggleEnvMapBackground call, activate it now.\n    if (map && _settings.envMapBg) {\n      _clearPass.uniforms.envMapBackground.value = true;\n    }\n  };\n\n  this.getCubeMap = function () {\n    return _clearPass.material.envMap;\n  };\n\n  this.setEnvRotation = function (rotation) {\n    _envRotation = rotation;\n    _clearPass.material.envRotationSin = Math.sin(rotation);\n    _clearPass.material.envRotationCos = Math.cos(rotation);\n  };\n\n  this.getEnvRotation = function () {\n    return _envRotation;\n  };\n\n  this.setEnvExposure = function (exposure) {\n    _clearPass.uniforms['envMapExposure'].value = Math.pow(2.0, exposure);\n\n    //The renderer overwrites the uniform's value based on the material's\n    //property in refreshUniformsIBL, so set it there too.\n    _clearPass.material.envMapExposure = Math.pow(2.0, exposure);\n    _clearPass.material.needsUpdate = true;\n\n    _exposure = exposure;\n  };\n\n  this.setTonemapExposureBias = function (bias) {\n    _exposureBias = bias;\n\n    _clearPass.uniforms['exposureBias'].value = Math.pow(2.0, bias);\n\n    //_blendPass.uniforms['exposureBias'].value = Math.pow(2.0, bias);\n  };\n\n  this.getExposureBias = function () {\n    return _exposureBias;\n  };\n\n  //Required for switching camera for stereo rendering\n  this.setCamera = function (camera) {\n    _camera = camera;\n  };\n\n  this.setTonemapMethod = function (value) {\n\n    _tonemapMethod = value;\n\n    if (value === 0) {\n      /*\n                          if (_settings.useHdrTarget) {\n                              //reallocate the render target if we are going from hdr to ldr\n                              _settings.useHdrTarget = false;\n                              this.setSize(_w, _h, true);\n                          }\n                          */\n      _renderer.gammaInput = false;\n    } else\n    {\n      /*\n          if (!_settings.useHdrTarget) {\n              //reallocate the render target if we are going from hdr to ldr\n              _settings.useHdrTarget = true;\n              this.setSize(_w, _h, true);\n          }\n      */\n      //Tell the renderer to linearize all material colors\n      _renderer.gammaInput = true;\n    }\n\n    _clearPass.material.tonemapOutput = _tonemapMethod;\n    _clearPass.material.needsUpdate = true;\n\n    // _blendPass.uniforms['toneMapMethod'].value = value;\n\n  };\n\n  this.getToneMapMethod = function () {\n    return _tonemapMethod;\n  };\n\n  this.toggleTwoSided = function (isTwoSided) {\n\n    //In case the viewer encounters two-sided materials\n    //it will let us know, so that we can update\n    //the override material used for the SAO G-buffer to also\n    //render two sided.\n    if (_settings.haveTwoSided != isTwoSided) {\n      if (_depthMaterial) {\n        forEachDepthMaterial(function (mat) {\n          mat.side = isTwoSided ? THREE.DoubleSide : THREE.FrontSide;\n          mat.needsUpdate = true;\n        });\n      }\n    }\n    _settings.haveTwoSided = isTwoSided;\n  };\n\n  this.toggleEdges = function (state) {\n    _settings.renderEdges = state;\n    _oldSettings.renderEdges = state; // avoid settings from outside to be overwritten if triggered before exit2DMode switch.\n  };\n\n  this.getRenderEdges = function () {\n    return _settings.renderEdges;\n  };\n\n  this.getRenderEdges = function () {\n    return _settings.renderEdges;\n  };\n\n  this.toggleEnvMapBackground = function (value) {\n    _settings.envMapBg = value;\n\n    // Activate envMap only if the map is already available. Otherwise, we delay it and do it later once setCubeMap is called.\n    // This avoids a temporarily black screen if envMap is not loaded yet.\n    _clearPass.uniforms.envMapBackground.value = value && !!_clearPass.material.envMap;\n  };\n\n  this.enter2DMode = function (idMaterial, selectionColor) {\n    _idMaterial = idMaterial;\n    _oldSettings.sao = _settings.sao;\n    _oldSettings.antialias = _settings.antialias;\n    _oldSettings.idbuffer = _settings.idbuffer;\n    _oldSettings.renderEdges = _settings.renderEdges;\n    _oldSettings.useIdBufferSelection = _settings.useIdBufferSelection;\n\n    if (selectionColor) {\n      _oldSettings.selectionColor = _settings.selectionColor;\n      this.setSelectionColor(selectionColor);\n    }\n\n    // Always use idBuffer for 2D. For consistency, we even do it for models without ids (e.g. leaflets). Reasons:\n    //  1. Latest if we add a vector 2D file after the leaflet later, we still need the idBuffer.\n    //  2. Using idBuffer avoids the heuristic detection of highlighting pixels in BlendShader - which may cause unwanted color modifications in overlays.\n    _settings.idbuffer = true;\n\n    // Note: If edges are active, the edge rendering pass assumes all main scene geometry to provide edge indices.\n    //       Any geometry without edge indices would just re-rendered using the edge shader - which just results in artifacts.\n    //       Therefore, disable edge rendering for 2D mode.\n    _settings.renderEdges = false;\n    _blendPass.material.defines.IS_2D = \"\";\n\n    // Always use idBuffer selection if idBuffer is available.\n    setIdBufferSelectionEnabled(_settings.idbuffer);\n\n    this.initPostPipeline(false, false);\n  };\n\n  this.exit2DMode = function () {\n    _idMaterial = null;\n    _settings.idbuffer = _oldSettings.idbuffer;\n    _settings.renderEdges = _oldSettings.renderEdges;\n    if (_oldSettings.selectionColor) {\n      this.setSelectionColor(_oldSettings.selectionColor);\n    }\n    delete _blendPass.material.defines.IS_2D;\n\n    // Recover original (3D mode) state of idBufferEnabled flag\n    setIdBufferSelectionEnabled(_oldSettings.idbuffer);\n\n    this.initPostPipeline(_oldSettings.sao, _oldSettings.antialias);\n  };\n\n  //Returns the value of the ID buffer at the given\n  //viewport location. Note that the viewport location is in\n  //OpenGL-style coordinates [-1, 1] range.\n  //If the optional third parameter is passed in, it's assume to be a two integer array-like,\n  //and the extended result of the hit test (including model ID) is stored in it.\n  this.idAtPixel = function (vpx, vpy, res) {\n    if (!_idTargets[0])\n    return 0;\n\n    var px = 0 | (vpx + 1.0) * 0.5 * _idTargets[0].width;\n    var py = 0 | (vpy + 1.0) * 0.5 * _idTargets[0].height;\n\n    if (_lastIDValid && px === _lastX && py === _lastY) {\n      if (res) {\n        res[0] = _lastID;\n        res[1] = _lastModelID;\n      }\n      return _lastID;\n    }\n\n    _renderer.readRenderTargetPixels(_idTargets[0], px, py, 1, 1, _readbackBuffer);\n\n    var id = _readbackBuffer[2] << 16 | _readbackBuffer[1] << 8 | _readbackBuffer[0];\n    var modelId = 0;\n\n    if (_idTargets[1]) {\n      _renderer.readRenderTargetPixels(_idTargets[1], px, py, 1, 1, _readbackBuffer);\n\n      modelId = _readbackBuffer[1] << 8 | _readbackBuffer[0];\n\n      //recover negative values when going from 16 -> 32 bits.\n      modelId = modelId << 16 >> 16;\n\n      //Upper byte of 32 bit dbId encoded in the 3rd byte of the model ID target.\n      //id = id | (_readbackBuffer[2] << 24);\n      //TODO: ouch, the above does not work for 2d sheets, because each mesh contains many objects.\n      //Do something about it...\n      id = id << 8 >> 8;\n\n    } else {\n      //sign extend the upper byte to get back negative numbers (since we clamp 32 bit to 24 bit when rendering ids)\n      id = id << 8 >> 8;\n    }\n\n    _lastX = px;\n    _lastY = py;\n    _lastID = id;\n    _lastModelID = modelId;\n    _lastIDValid = true;\n\n    if (res) {\n      res[0] = id;\n      res[1] = modelId;\n    }\n\n    return id;\n  };\n\n  this.idAtPixels = function (vpx, vpy, res, result) {\n    if (!_idTargets[0])\n    return 0;\n\n    var px = (vpx + 1.0) * 0.5 * _idTargets[0].width - (res - 1) * 0.5;\n    var py = (vpy + 1.0) * 0.5 * _idTargets[0].height - (res - 1) * 0.5;\n\n    var readbackBuffer = new Uint8Array(4 * res * res);\n\n    _renderer.readRenderTargetPixels(_idTargets[0], px, py, res, res, readbackBuffer);\n\n    var readbackBuffer2 = undefined;\n    if (result && _idTargets[1]) {\n      readbackBuffer2 = new Uint8Array(4 * res * res);\n      _renderer.readRenderTargetPixels(_idTargets[1], px, py, res, res, readbackBuffer2);\n    }\n    // Start the search at the center of the region and then spiral.\n    function spiral() {\n\n      var id;\n      var x = 0,y = 0;\n      var dx = 0,dy = -1;\n\n      for (var i = 0; i < res * res; i++) {\n\n        // Translate coordinates with top left as (0, 0)\n        var tx = x + (res - 1) / 2;\n        var ty = y + (res - 1) / 2;\n        if (tx >= 0 && tx <= res && ty >= 0 && ty <= res) {\n          var index = tx + ty * res;\n          id = readbackBuffer[4 * index + 2] << 16 | readbackBuffer[4 * index + 1] << 8 | readbackBuffer[4 * index];\n\n          //sign extend the upper byte to get back negative numbers (since we clamp 32 bit to 24 bit when rendering ids)\n          id = id << 8 >> 8;\n          if (id >= 0) {\n            if (readbackBuffer2) {\n              var modelId = readbackBuffer2[4 * index + 1] << 8 | readbackBuffer2[4 * index];\n              //recover negative values when going from 16 -> 32 bits.\n              modelId = modelId << 16 >> 16;\n\n              result[0] = id;\n              result[1] = modelId;\n            }\n            break;\n          }\n        }\n\n        if (x == y || x < 0 && x == -y || x > 0 && x == 1 - y) {\n          var t = dx;\n          dx = -dy;\n          dy = t;\n        }\n        x += dx;\n        y += dy;\n      }\n\n      return id;\n    }\n\n    return spiral();\n\n  };\n\n  this.idsAtPixelsBox = function (vpx, vpy, widthRatio, heightRatio, results) {\n    if (!_idTargets[0])\n    return;\n\n    var width = widthRatio * _idTargets[0].width;\n    var height = heightRatio * _idTargets[0].height;\n\n    var px = 0 | (vpx + 1.0) * 0.5 * _idTargets[0].width;\n    var py = 0 | (vpy + 1.0) * 0.5 * _idTargets[0].height;\n\n    var readbackBuffer = new Uint8Array(4 * width * height);\n\n    _renderer.readRenderTargetPixels(_idTargets[0], px, py, width, height, readbackBuffer);\n\n    var readbackBuffer2 = undefined;\n    if (results && _idTargets[1]) {\n      readbackBuffer2 = new Uint8Array(4 * width * height);\n      _renderer.readRenderTargetPixels(_idTargets[1], px, py, width, height, readbackBuffer2);\n    }\n\n    var ids = {};\n\n    for (var i = 0; i < readbackBuffer.length; i += 4) {\n      var id = readbackBuffer[4 * i + 2] << 16 | readbackBuffer[4 * i + 1] << 8 | readbackBuffer[4 * i];\n\n      //sign extend the upper byte to get back negative numbers (since we clamp 32 bit to 24 bit when rendering ids)\n      id = id << 8 >> 8;\n      if (id > 0) {\n        var modelId = 0;\n        if (readbackBuffer2) {\n          modelId = readbackBuffer2[4 * i + 1] << 8 | readbackBuffer2[4 * i];\n          //recover negative values when going from 16 -> 32 bits.\n          modelId = modelId << 16 >> 16;\n        }\n        //ignore duplicate ids\n        var key = id + '-' + modelId;\n        if (!ids[key]) {\n          ids[key] = true;\n          results.push([id, modelId]);\n        }\n      }\n    }\n  };\n\n  this.readbackTargetId = function () {\n    if (!_idTargets[0])\n    return null;\n\n    var readbackBuffer = new Uint8Array(4 * _idTargets[0].width * _idTargets[0].height);\n    _renderer.readRenderTargetPixels(_idTargets[0], 0, 0, _idTargets[0].width, _idTargets[0].height, readbackBuffer);\n\n    return {\n      buffer: readbackBuffer,\n      width: _idTargets[0].width,\n      height: _idTargets[0].height };\n\n  };\n\n  /**\n      * {Number} vpx - OpenGL style X-coordinate [-1..1]\n      * {Number} vpy - OpenGL style Y-coordinate [-1..1]\n      */\n  this.rolloverObjectViewport = function (vpx, vpy) {\n    _idRes[1] = 0; // Reset model-id to 0\n    var objId = this.idAtPixel(vpx, vpy, _idRes);\n    return this.rolloverObjectId(objId, null, _idRes[1]);\n  };\n\n  // Encode 16-Bit modelId into Vector2\n  function modelIdToVec2(modelId, target) {\n    target = target || new THREE.Vector2();\n    target.set(\n    (modelId & 0xFF) / 255,\n    (modelId >> 8 & 0xFF) / 255);\n\n    return target;\n  }\n\n  // Update BlendShader configuration to specify which modelId(s)\n  // are shown with rollOver highlight.\n  function setHighlightModelId(modelId) {\n\n    // Handle length-1 arrays exactly like single ids.\n    if (Array.isArray(modelId) && modelId.length == 1) {\n      modelId = modelId[0];\n    }\n\n    // No change => no work.\n    if (modelId === _lastHighlightModelId) {\n      return false;\n    }\n\n    var oldCount = Array.isArray(_lastHighlightModelId) ? _lastHighlightModelId.length : 1;\n    var newCount = Array.isArray(modelId) ? modelId.length : 1;\n\n    // For multiple ids, stop if arrays are equal\n    if (newCount > 1) {\n      modelId.sort();\n\n      // Compare element-wise\n      if (newCount == oldCount && !_lastHighlightModelId.some(function (e, i) {return e !== modelId[i];})) {\n        return false;\n      }\n    }\n\n    // Reconfigure shader if the number of needed modelId parameter changes.\n    // In most cases, we will have oldCount == newCount == 1.\n    if (newCount != oldCount) {\n\n      if (newCount == 1) {\n        // Default case - just use single shader param\n        delete _blendPass.material.defines[\"HIGHLIGHT_MODEL_ID_COUNT\"];\n      } else {\n        // Use array-param for modelId\n        _blendPass.material.defines[\"HIGHLIGHT_MODEL_ID_COUNT\"] = newCount.toString();\n      }\n      _blendPass.material.needsUpdate = true;\n    }\n\n    _lastHighlightModelId = modelId;\n\n    if (newCount == 1) {\n      // Handle length-1 arrays like single ids\n      modelId = Array.isArray(modelId) ? modelId[0] : modelId;\n\n      // Default case: Just set single shader param\n      modelIdToVec2(modelId, _blendPass.uniforms['modelIDv2'].value);\n    } else {\n      // Set array of modelIds to highlight\n      _blendPass.uniforms['modelIDsv2v'].value = modelId.map(function (id) {return modelIdToVec2(id);});\n    }\n    return true;\n  }\n\n  // Configure BlendShader for highlighting the given object id\n  function setHighlightObjectId(objId) {\n\n    // No change => no work.\n    if (objId === _lastHighlightId) {\n      return false;\n    }\n    _lastHighlightId = objId;\n\n    //console.log(objId, modelId);\n\n    //Check if nothing was at that pixel -- 0 means object\n    //that has no ID, ffffff (-1) means background, and both result\n    //in no highlight.\n    if (objId === -1) {\n      objId = 0;\n    }\n\n    _blendPass.uniforms['objIDv4'].value.set((objId & 0xFF) / 255,\n    (objId >> 8 & 0xFF) / 255,\n    (objId >> 16 & 0xFF) / 255,\n    (objId >> 24 & 0xFF) / 255);\n\n    return true;\n  }\n\n  // Configure rollover highlighting for objects or models\n  //  @param {number}          objId\n  //  @param {number|number[]} modelId            - One or multiple modelIds to be highlighted.\n  //  @param {bool}            highlightFullModel - If true, the whole model is highlighted and the obId is ignored.\n  function setRolloverHighlight(objId, modelId, highlightFullModel) {\n\n    // An undefined modelId may happen if a) there is no MODEL_ID buffer or b) nothing is highlighted.\n    modelId = modelId || 0;\n\n    // apply new objId and modelId\n    var objChanged = setHighlightObjectId(objId);\n    var modelChanged = setHighlightModelId(modelId);\n\n    // Only restart highlight fade on actual changes\n    if (!objChanged && !modelChanged) {\n      return;\n    }\n\n    _blendPass.uniforms['highlightIntensity'].value = 0;\n\n    _lastObjTime = performance.now();\n\n    // Determine whether to highlight a single object or whole model(s)\n    _blendPass.uniforms['highlightFullModel'].value = highlightFullModel ? 1.0 : 0.0;\n\n    return true;\n  };\n\n  /**\n      * {Number} objId - Main Integer id to highlight. If it's not a leaf node, \n      *                  then the dbIds (presumable all its children) will also be highlighed, too.\n      * {Number} [dbIds] - OPTIONAL, id range to highlight.\n      * {Number} [modelId] - OPTIONAL, id of the model containing the id range.\n      */\n  this.rolloverObjectId = function (objId, dbIds, modelId) {\n    return setRolloverHighlight(objId, modelId, false);\n  };\n\n  this.getRollOverDbId = function () {\n    return _lastHighlightId;\n  };\n\n  this.getRollOverModelId = function () {\n    return _lastHighlightModelId;\n  };\n\n  // Roll-over highlighting for whole model. Requires modelId buffer.\n  //  @param {number|number[]} modelId - One or more models to highlight.\n  this.rollOverModelId = function (modelId) {\n    return setRolloverHighlight(1, modelId, true);\n  };\n\n  // Note: Colored highlighting is currently only implemented for 3D. For 3D models, it has no effect.\n  //\n  // @param {THREE.Color} color - default is white\n  // The color that is added to the actual fragment color on hover.\n  // Default is white. Choosing a darker color reduces highlighting intensity.\n  this.setRollOverHighlightColor = function (color) {\n    if (!color) {\n      // reset to default (white)\n      _blendPass.uniforms['highlightColor'].value.set(1, 1, 1);\n    } else {\n      _blendPass.uniforms['highlightColor'].value.copy(color);\n    }\n    _blendPass.material.needsUpdate = true;\n  };\n\n  this.setDbIdForEdgeDetection = function (objId, modelId) {\n\n    _blendPass.uniforms['edgeObjIDv4'].value.set((objId & 0xFF) / 255,\n    (objId >> 8 & 0xFF) / 255,\n    (objId >> 16 & 0xFF) / 255,\n    (objId >> 24 & 0xFF) / 255);\n\n\n    _blendPass.uniforms['edgeModelIDv2'].value.set((modelId & 0xFF) / 255,\n    (modelId >> 8 & 0xFF) / 255);\n\n  };\n\n\n  /** Optional: Spatial filter to restrict mouse-over highlighting based on world-position.\n      *   @param {string} [filter] - A shader chunk that defines a spatial filter function.\n      *                              It must have the form:\n      *                                  bool spatialFilter(vec3 worldPos) { ... }\n      *                              If it returns false, a fragment is excluded from rollover highlighting.\n      * Call with undefined to remove filter.\n      *\n      * NOTE: This feature can only be used in combination with SAO, because it\n      *       requires the depthTexture.\n      */\n  this.setSpatialFilterForRollOver = function (filter) {\n\n    // Refuse if not supported\n    if (filter && !this.spatialFilterForRollOverSupported()) {\n      logger.warn('Spatial filter for mouse-over can only be used with depth target');\n      return;\n    }\n\n    var macroName = \"SPATIAL_FILTER\";\n\n    // Avoid expensive recompile if nothing changed\n    if (_blendPass.material.defines[macroName] === filter) {\n      return;\n    }\n\n    if (!filter || filter === '') {\n      // Note that just assigning 'undefined' would not work here. The macro would\n      // still be defined and appear as \"#define SPATIAL_FILTER undefined\" in the shader.\n      delete _blendPass.material.defines[macroName];\n    } else {\n      _blendPass.material.defines[macroName] = filter;\n    }\n    _blendPass.material.needsUpdate = true;\n\n    // Restart fading of highlighting intensity\n    _blendPass.uniforms['highlightIntensity'].value = 0;\n    _lastObjTime = performance.now();\n  };\n\n  // This feature uses a depthTexture in blendPass, which is only\n  // available if SAO is active and supported.\n  this.spatialFilterForRollOverSupported = function () {\n    return isRenderTargetUsed(RenderTargets.Depth);\n  };\n\n  this.setEdgeColor = function (colorAsVec4) {\n    _edgeColor.copy(colorAsVec4);\n  };\n\n  this.setSelectionColor = function (color) {\n    // The selection color is gamma corrected using 2.0.\n    var gamma = new THREE.Color(color);\n    gamma.r = Math.pow(gamma.r, 2.0);\n    gamma.g = Math.pow(gamma.g, 2.0);\n    gamma.b = Math.pow(gamma.b, 2.0);\n    _blendPass.uniforms['selectionColor'].value.set(gamma);\n    _blendPass.material.needsUpdate = true;\n    _settings.selectionColor = color;\n  };\n\n  this.setUnitScale = function (metersPerUnit) {\n    _unitScale = metersPerUnit;\n  };\n\n  this.getUnitScale = function () {\n    return _unitScale;\n  };\n\n  this.getBlendPass = function () {\n    return _blendPass;\n  };\n\n  this.getClearPass = function () {\n    return _clearPass;\n  };\n\n  // TODO_NOP: hack expose colorTarget so shadow/reflection can draw into\n  this.getColorTarget = function () {\n    return _colorTarget;\n  };\n  this.getIDTargets = function () {\n    return _idTargets;\n  };\n\n  /**\n      * @returns {WebGLRenderTarget} Normal/depth target for this context (if rendered)\n      */\n  this.getDepthTarget = function () {\n    return _depthTarget;\n  };\n\n  /**\n      * @returns {WebGLRenderTarget} Model ID target for this context (if rendered)\n      */\n  this.getIdTarget = function () {\n    return _idTargets[0];\n  };\n\n  // TODO_NOP: hack expose depthMaterial to register with matman for cutplanes\n  this.getDepthMaterial = function () {\n    return _depthMaterial;\n  };\n\n  this.getPostTarget = function () {\n    return _postTarget1;\n  };\n\n  //TODO: Why not, adding another NOP-style hack\n  this.getEdgeMaterial = function () {\n    return _edgeMaterial;\n  };\n\n  // Allows to register a cross-fade object that manages multiple color targets and can control which content\n  // is rendered to which target.\n  this.setCrossFade = function (crossFade) {\n    _crossFade = crossFade;\n  };\n  this.getCrossFade = function () {\n    return _crossFade;\n  };\n\n  /** If an offset target is set (default null), the final rendering result is not presented\n      *  anymore, but rendered to the given offscreen target. setOffscreenTarget(null) resets to\n      *  normal canvas rendering.\n      *   @param {THREE.WebGLTarget} target\n      */\n  this.setOffscreenTarget = function (target) {\n    _offscreenTarget = target;\n  };\n\n  this.getOffscreenTarget = function () {\n    return _offscreenTarget;\n  };\n\n  this.getNamedTarget = function (targetName) {\n    switch (targetName) {\n      case 'color':return _colorTarget;\n      case 'overlay':return _overlayTarget;\n      case 'id':return _idTargets[0];\n      case 'post1':return _postTarget1;\n      case 'post2':return _postTarget2;\n      case 'postdisplay':return _postProcDisplayTarget;\n      case 'ssao':return _ssaoTarget;\n      case 'depth':return _depthTarget;}\n\n    return null;\n  };\n\n  /**\n      * @returns {WebGLFramebuffer} Currently bound framebuffer for this context\n      */\n  this.getCurrentFramebuffer = function () {\n    return _renderer.getCurrentFramebuffer();\n  };\n\n  // Returns a state object combines various configuration settings that may be modified from outside.\n  this.getConfig = function () {\n    return {\n      renderEdges: _settings.renderEdges,\n      envMapBackground: _settings.envMapBg,\n      envMap: _clearPass.material.envMap,\n      envExposure: _exposure,\n      toneMapExposureBias: _exposureBias,\n      envRotation: this.getEnvRotation(),\n      tonemapMethod: _tonemapMethod,\n      clearColor: _clearColor && _clearColor.clone(),\n      clearColorTop: !_clearColor && _clearPass.uniforms.color1.value.clone(),\n      clearColorBottom: !_clearColor && _clearPass.uniforms.color2.value.clone(),\n      clearAlpha: _clearAlpha,\n      useOverlayAlpha: _useOverlayAlpha,\n      aoEnabled: this.getAOEnabled(),\n      aoRadius: this.getAORadius(),\n      aoIntensity: this.getAOIntensity(),\n      twoSided: _settings.haveTwoSided,\n      edgeColor: _edgeColor.clone(),\n      unitScale: this.getUnitScale(),\n      is2D: !!_blendPass.material.defines.IS_2D,\n      antialias: this.getAntialiasing(),\n      idMaterial: _idMaterial, // needed for 2D\n      selectionColor: _settings.selectionColor };\n\n  };\n\n  this.applyConfig = function (config) {\n    this.toggleEdges(config.renderEdges);\n    this.toggleEnvMapBackground(config.envMapBackground);\n    this.setCubeMap(config.envMap);\n    this.setEnvExposure(config.envExposure);\n    this.setTonemapExposureBias(config.toneMapExposureBias);\n    this.setEnvRotation(config.envRotation);\n    this.setTonemapMethod(config.tonemapMethod);\n    this.toggleTwoSided(config.twoSided);\n    this.setEdgeColor(config.edgeColor);\n    this.setUnitScale(config.unitScale);\n\n    if (config.clearColor) {\n      this.setClearColors(config.clearColor);\n    } else {\n      this.setClearColors(config.clearColorTop, config.clearColorBottom);\n    }\n    this.setClearAlpha(config.clearAlpha);\n    this.useOverlayAlpha(config.useOverlayAlpha);\n\n    // Enter/Exit 2D/3D mode if necessary\n    var is2D = !!_blendPass.material.defines.IS_2D;\n    if (config.is2D && !is2D) {\n      this.enter2DMode(config.idMaterial, config.selectionColor);\n    } else if (!config.is2D && is2D) {\n      this.setSelectionColor(config.selectionColor);\n      this.exit2DMode();\n    }\n\n    // Toggling SAO or antialiasing needs to reinitialize post pipeline.\n    // Note: In theory, it may happen that initPostPipeline runs twice if there \n    //       was already a 2D/3D mode switch above. But that's not really a frequent case.\n    var saoChanged = config.aoEnabled != this.getAOEnabled();\n    var antialiasChanged = config.antialias != this.getAntialiasing();\n    if (saoChanged || antialiasChanged) {\n      this.initPostPipeline(config.aoEnabled, config.antialias);\n    }\n  };\n\n  // Reads a WebGLRenderTarget into a 2D canvas.\n  // Returns { canvas, ctx } providing canvas and its 2d context.\n  this.targetToCanvas = function (target) {\n    var w = target.width;\n    var h = target.height;\n    // Render into buffer.\n    //TODO: This is making a quite large memory allocation in addition to the source render target\n    //and target HTML canvas. We can instead refactor the code to copy the data into the target\n    //row by row or a few rows at a time in case memory allocation here becomes an issue.\n    var buffer = new Uint8Array(w * h * 4);\n    _renderer.readRenderTargetPixels(target, 0, 0, w, h, buffer);\n\n    // Create working canvas\n    var tmpCanvas = _document.createElement('canvas');\n    tmpCanvas.width = w;\n    tmpCanvas.height = h;\n    var ctx = tmpCanvas.getContext('2d');\n\n    var imgData;\n    var cbuf = new Uint8ClampedArray(buffer);\n    if (isIE11) {\n      imgData = ctx.createImageData(w, h);\n      imgData.data.set(cbuf);\n    } else {\n      imgData = new ImageData(cbuf, w, h);\n    }\n\n    ctx.putImageData(imgData, 0, 0);\n\n    // Flip vertically\n    ctx.globalCompositeOperation = 'copy';\n    ctx.translate(0, h);\n    ctx.scale(1, -1);\n    ctx.drawImage(tmpCanvas, 0, 0, w, h);\n    ctx.globalCompositeOperation = 'source-over';\n\n    return {\n      canvas: tmpCanvas,\n      ctx: ctx };\n\n  };\n}","function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;} /**\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               * During refactor of NPR feature out of the render context\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               * Created the RenderContextExtension as base interface class for extension developers to consume\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               * \n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               * And we will integrate the RenderContextExtension into main RenderContext as a valid extension \n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               * to allow other developers to implement their own post process rendering effect\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               * \n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               */var\nRenderContextPostProcessExtension = /*#__PURE__*/function () {\n  function RenderContextPostProcessExtension(renderContext, viewer) {_classCallCheck(this, RenderContextPostProcessExtension);\n    this.viewer = viewer;\n    this.renderContext = renderContext;\n    this.postProcPass = null;\n    this.postProcShaded = false;\n\n    this.setGlobalManager(viewer.globalManager);\n  }\n\n  /**\n     * lifecycle function\n     */_createClass(RenderContextPostProcessExtension, [{ key: \"load\", value: function load()\n    {\n    }\n\n    /**\n       * lifecycle function\n       */ }, { key: \"unload\", value: function unload()\n    {\n      this.viewer = null;\n      this.renderContext = null;\n      this.postProcPass = null;\n    }\n\n    /**\n       * Enable post processing pass\n       */ }, { key: \"enable\", value: function enable()\n    {\n      this.setPostProcShaded(true);\n\n      var _settings = this.renderContext.settings;\n\n      this.renderContext.initPostPipeline(_settings.sao, _settings.antialias);\n\n      // Necessary in order to update MRT flags.\n      this.viewer.impl.fireRenderOptionChanged();\n\n      this.viewer.impl.invalidate(true, true, true);\n    }\n\n    /**\n       * Disable post processing pass\n       */ }, { key: \"disable\", value: function disable()\n    {\n      this.setPostProcShaded(false);\n\n      this.viewer.impl.invalidate(false, false, true);\n    } }, { key: \"shouldRenderAfterOverlays\", value: function shouldRenderAfterOverlays()\n\n    {\n      return false;\n    }\n\n    /**\n       * Render function\n       * @param {WebGLRender} renderer \n       * @param {WebGLRenderTarget} outTarget \n       * @param {WebGLRenderTarget} inTarget \n       * @param {WebGLRenderTarget} overlaysRendered\n       */ }, { key: \"render\", value: function render(\n    renderer, outTarget, inTarget, overlaysRendered) {\n      var overlaysRenderedVerified = overlaysRendered === undefined || overlaysRendered === this.shouldRenderAfterOverlays();\n      var shouldRender = this.isPostProcShaded() && overlaysRenderedVerified;\n\n      if (shouldRender) {\n        this.postProcPass.render(renderer, outTarget, inTarget);\n        return true;\n      }\n\n      return false;\n    }\n\n    /**\n       * Change shader uniform value\n       * @param {string} key \n       * @param {any} value \n       * @param {boolean} usingCopy \n       */ }, { key: \"updateUniformValue\", value: function updateUniformValue(\n    key, value, usingCopy) {\n      if (!this.postProcPass.uniforms[key]) {\n        return;\n      }\n\n      if (usingCopy) {\n        this.postProcPass.uniforms[key].value.copy(value);\n      } else {\n        this.postProcPass.uniforms[key].value = value;\n      }\n\n      this.viewer.impl.invalidate(false, false, true);\n    }\n\n    /**\n       * Change shader define value\n       * @param {string} key \n       * @param {any} value \n       */ }, { key: \"updateDefineValue\", value: function updateDefineValue(\n    key, value) {\n      if (this.postProcPass.material.defines[key] !== value) {\n        if (value !== null) {\n          this.postProcPass.material.defines[key] = value;\n        } else {\n          delete this.postProcPass.material.defines[key];\n        }\n\n        this.setMaterialNeedsUpdate();\n      }\n    }\n\n    /**\n       * Get uniform value\n       */ }, { key: \"getUniformValue\", value: function getUniformValue(\n    key) {\n      return this.postProcPass.uniforms[key].value;\n    }\n\n    /**\n       * Get define value\n       */ }, { key: \"getDefineValue\", value: function getDefineValue(\n    key) {\n      return this.postProcPass.material.defines[key];\n    }\n\n    /**\n       * Update RenderPass resolutions\n       * @param {int} resX \n       * @param {int} resY \n       */ }, { key: \"changeResolution\", value: function changeResolution(\n    resX, resY) {\n      this.postProcPass.uniforms[\"resolution\"].value.set(resX, resY);\n    }\n\n    /**\n       * Call when we need to update the material\n       */ }, { key: \"setMaterialNeedsUpdate\", value: function setMaterialNeedsUpdate()\n    {\n      this.postProcPass.material.needsUpdate = true;\n      this.viewer.impl.invalidate(false, false, true);\n    }\n\n    /**\n       * return true if the edges on\n       * @returns boolean\n       */ }, { key: \"postProcessEdgesOn\", value: function postProcessEdgesOn()\n    {\n      return false;\n    } }, { key: \"setPostProcShaded\", value: function setPostProcShaded(\n\n    enable) {\n      this.postProcShaded = enable;\n    }\n\n    // Is post process enabled.\n  }, { key: \"isPostProcShaded\", value: function isPostProcShaded() {\n      return this.postProcShaded;\n    }\n\n    // Used to determine the order of rendering.\n  }, { key: \"getOrder\", value: function getOrder() {\n      return 0;\n    } }]);return RenderContextPostProcessExtension;}();\n\n\n/**\n                                                         * This class is used to work as an RenderContext Post Processing Shading Manager\n                                                         * \n                                                         */var\nRenderContextPostProcessManager = /*#__PURE__*/function () {\n\n  function RenderContextPostProcessManager() {_classCallCheck(this, RenderContextPostProcessManager);\n    // RenderContext extensions array.\n    this.rcExtensions = [];\n  }\n  /**\n     * Register the real PostProcessExtension instance\n     * \n     * @param {RenderContextPostProcessExtension} rcExtension \n     */_createClass(RenderContextPostProcessManager, [{ key: \"registerPostProcessingExtension\", value: function registerPostProcessingExtension(\n    rcExtension) {\n      this.rcExtensions.push(rcExtension);\n\n      // Sort according to extension's order. The lower the order value the sooner it will get renderer.\n      this.rcExtensions.sort(function (a, b) {return b.getOrder() - a.getOrder();});\n    }\n\n    /**\n       * Remove the PostProcessExtension instance\n       */ }, { key: \"removePostProcessingExtension\", value: function removePostProcessingExtension(\n    rcExtension) {\n      var index = this.rcExtensions.indexOf(rcExtension);\n\n      if (index !== -1) {\n        rcExtension.unload();\n        this.rcExtensions.splice(index, 1);\n      }\n    } }, { key: \"render\", value: function render(\n\n    renderer, outTarget, inTarget, tmpTarget, overlaysRendered) {\n      for (var i = 0; i < this.rcExtensions.length; i++) {\n        var rendered = this.rcExtensions[i].render(renderer, outTarget, inTarget, overlaysRendered);\n\n        // Swap targets in order to accumulate the passes.\n        if (rendered) {\n          inTarget = outTarget;\n\n          var t = outTarget;\n          outTarget = tmpTarget;\n          tmpTarget = t;\n        }\n      }\n\n      return inTarget;\n    } }, { key: \"updateUniformValue\", value: function updateUniformValue(\n\n    key, value, usingCopy) {\n      for (var i = 0; i < this.rcExtensions.length; i++) {\n        this.rcExtensions[i].updateUniformValue(key, value, usingCopy);\n      }\n    } }, { key: \"changeResolution\", value: function changeResolution(\n\n    resX, resY) {\n      for (var i = 0; i < this.rcExtensions.length; i++) {\n        this.rcExtensions[i].changeResolution(resX, resY);\n      }\n    } }, { key: \"setMaterialNeedsUpdate\", value: function setMaterialNeedsUpdate()\n\n    {\n      for (var i = 0; i < this.rcExtensions.length; i++) {\n        this.rcExtensions[i].setMaterialNeedsUpdate();\n      }\n    } }, { key: \"postProcessEdgesOn\", value: function postProcessEdgesOn()\n\n    {\n      return this.rcExtensions.some(function (ext) {return ext.postProcessEdgesOn();});\n    } }, { key: \"isPostProcShaded\", value: function isPostProcShaded()\n\n    {\n      return this.rcExtensions.some(function (ext) {return ext.isPostProcShaded();});\n    } }]);return RenderContextPostProcessManager;}();\n\n\n\nexport { RenderContextPostProcessExtension, RenderContextPostProcessManager };","// Bilateral separable blur pass for SAO shader.\n// Derived from http://g3d.cs.williams.edu/websvn/filedetails.php?repname=g3d&path=%2FG3D10%2Fdata-files%2Fshader%2FAmbientOcclusion%2FAmbientOcclusion_blur.pix\n// but without the normals being used in the bilateral filter.\n\nimport { Vector2 } from \"three\";\nimport screen_quad_uv_vert from './shaders/screen_quad_uv_vert.glsl';\nimport sao_blur_frag from './shaders/sao_blur_frag.glsl';\n\nexport var SAOBlurShader = {\n  uniforms: {\n    tDiffuse: { type: \"t\", value: null },\n    size: { type: \"v2\", value: new Vector2(512, 512) },\n    resolution: { type: \"v2\", value: new Vector2(1.0 / 512, 1.0 / 512) },\n    axis: { type: \"v2\", value: new Vector2(1, 0) },\n    // Width of AO effect in native geometry units (meters or whatever).\n    // Same value as passed into SAOShader.js\n    radius: { type: \"f\", value: 50.0 } },\n\n  vertexShader: screen_quad_uv_vert,\n  fragmentShader: sao_blur_frag };","// Shader used to convert the normals+depth texture into a smaller texture containing only depth\n// Since it packs depth into RGBA8 target it also maps it to the range 0-1 then packs that float\n// into an RGBA using magic.\n\nimport { Vector2 } from \"three\";\nimport screen_quad_vert from './shaders/screen_quad_vert.glsl';\nimport sao_minfirst_frag from './shaders/sao_minfirst_frag.glsl';\nimport sao_min_frag from './shaders/sao_min_frag.glsl';\n\nexport var SAOMinifyFirstShader = {\n  uniforms: {\n    tDiffuse: { type: \"t\", value: null }, // Initial normals+depth texture\n    cameraNear: { type: \"f\", value: 1 },\n    cameraInvNearFar: { type: \"f\", value: 100 },\n    resolution: { type: \"v2\", value: new Vector2(1.0 / 512, 1.0 / 512) } // 1/size of lower mip level\n  },\n  vertexShader: screen_quad_vert,\n  fragmentShader: sao_minfirst_frag };\n\n\n// Shader used to generate mip levels for the depth texture (used by the SAO shader)\nexport var SAOMinifyShader = {\n  uniforms: {\n    tDiffuse: { type: \"t\", value: null }, // Lower mip level\n    resolution: { type: \"v2\", value: new Vector2(1.0 / 512, 1.0 / 512) } // 1/size of lower mip level\n  },\n  vertexShader: screen_quad_vert,\n  fragmentShader: sao_min_frag };","/* Scalable Ambient Obscurance implementation based on: \n   {http://graphics.cs.williams.edu/papers/SAOHPG12/} */\n// latest code as of 3/1/2016 found at\n// http://g3d.cs.williams.edu/websvn/filedetails.php?repname=g3d&path=%2FG3D10%2Fdata-files%2Fshader%2FAmbientOcclusion%2FAmbientOcclusion_AO.pix\n\nimport * as THREE from \"three\";\nimport { ShaderChunks as chunks } from './ShaderChunks';\nimport screen_quad_uv_vert from './shaders/screen_quad_uv_vert.glsl';\nimport sao_frag from './shaders/sao_frag.glsl';\n\nexport var SAOShader = {\n\n  uniforms: THREE.UniformsUtils.merge([\n\n  chunks.DepthTextureUniforms,\n\n  {\n    \"size\": { type: \"v2\", value: new THREE.Vector2(512, 512) },\n    \"resolution\": { type: \"v2\", value: new THREE.Vector2(1 / 512, 1 / 512) },\n    \"cameraNear\": { type: \"f\", value: 1 },\n    \"cameraFar\": { type: \"f\", value: 100 },\n    \"radius\": { type: \"f\", value: 12.0 }, // width of AO effect in native geometry units (meters or whatever)\n    \"bias\": { type: \"f\", value: 0.1 }, // set to be 0.01 * radius for non-mobile devices, 0.1 * radius for mobile, see setAOOptions\n    \"projScale\": { type: \"f\", value: 500 },\n    //\"clipInfo\":     { type: \"v3\", value: new THREE.Vector3(100, 99, -100) }, /* zf*zn, zn-zf, zf */\n    \"intensity\": { type: \"f\", value: 1.0 }, // darkness (higher is darker)\n\n    \"tDepth_mip1\": { type: \"t\", value: null },\n    \"tDepth_mip2\": { type: \"t\", value: null },\n    \"tDepth_mip3\": { type: \"t\", value: null },\n    \"tDepth_mip4\": { type: \"t\", value: null },\n    \"tDepth_mip5\": { type: \"t\", value: null } }]),\n\n\n\n  vertexShader: screen_quad_uv_vert,\n  fragmentShader: sao_frag };","/*\n * Reusable sets of uniforms that can be merged with other uniforms in specific shaders.\n */\n\nimport * as THREE from \"three\";\n\nexport var CutPlanesUniforms = {\n  \"cutplanes\": { type: \"v4v\", value: [] },\n  \"hatchParams\": { type: \"v2\", value: new THREE.Vector2(1.0, 10.0) },\n  \"hatchTintColor\": { type: \"c\", value: new THREE.Color(0xFFFFFF) },\n  \"hatchTintIntensity\": { type: \"f\", value: 1.0 } };\n\n\nexport var IdUniforms = {\n  \"dbId\": { type: \"v3\", value: new THREE.Vector3(0, 0, 0) },\n  \"modelId\": { type: \"v3\", value: new THREE.Vector3(0, 0, 0) } };\n\n\nexport var ThemingUniform = {\n  \"themingColor\": { type: \"v4\", value: new THREE.Vector4(0, 0, 0, 0) } };\n\n\n// Uniforms shared by material shader chunks and ShadowMapShader\n// Included by ShadowMapUniforms below.\nexport var ShadowMapCommonUniforms = {\n  \"shadowESMConstant\": { type: \"f\", value: 0.0 } };\n\n\n// Uniforms needed by material shaders to apply shadow mapping.\nexport var ShadowMapUniforms = THREE.UniformsUtils.merge([\n{\n  \"shadowMap\": { type: \"t\", value: null },\n  \"shadowMapSize\": { type: \"v2\", value: new THREE.Vector2(0, 0) },\n  \"shadowBias\": { type: \"f\", value: 0.0 },\n  \"shadowDarkness\": { type: \"f\", value: 0.0 },\n  \"shadowMatrix\": { type: \"m4\", value: new THREE.Matrix4() },\n  \"shadowLightDir\": { type: \"v3\", value: new THREE.Vector3() } },\n\nShadowMapCommonUniforms]);\n\n\n// Uniform for point-set point size\nexport var PointSizeUniforms = {\n  \"point_size\": { type: \"f\", value: 1.0 } };\n\n\n// Uniform for wide lines shader\nexport var WideLinesUniforms = {\n  \"view_size\": { type: \"v2\", value: new THREE.Vector2(640, 480) } };\n\n\n// Uniforms used for reconstructing positions from depth-texture in post-passes. (depth_texture.glsl)\nexport var DepthTextureUniforms = {\n  \"tDepth\": { type: \"t\", value: null },\n  \"projInfo\": { type: \"v4\", value: new THREE.Vector4() },\n  \"isOrtho\": { type: \"f\", value: 0.0 },\n  \"worldMatrix_mainPass\": { type: \"m4\", value: new THREE.Matrix4() } };\n\n\n/*\n                                                                         * Chunks are code snippets that can be included in specific shaders\n                                                                         * using the three.js-style include directive:\n                                                                         *\n                                                                         *      #include<name_of_chunk>\n                                                                         *\n                                                                         * During runtime this directive can be expanded into the corresponding\n                                                                         * code snippet using the `resolve` method available below.\n                                                                         */\nvar chunks = {};\n\n// We include default three.js chunks, too\nfor (var name in THREE.ShaderChunk) {\n  chunks[name] = THREE.ShaderChunk[name];\n}\n\nimport pack_depth from './chunks/pack_depth.glsl';\nimport depth_texture from './chunks/depth_texture.glsl';\nimport tonemap from './chunks/tonemap.glsl';\nimport ordered_dither from './chunks/ordered_dither.glsl';\nimport cutplanes from './chunks/cutplanes.glsl';\nimport pack_normals from './chunks/pack_normals.glsl';\nimport hatch_pattern from './chunks/hatch_pattern.glsl';\nimport env_sample from './chunks/env_sample.glsl';\nimport id_decl_vert from './chunks/id_decl_vert.glsl';\nimport id_vert from './chunks/id_vert.glsl';\nimport id_decl_frag from './chunks/id_decl_frag.glsl';\nimport id_frag from './chunks/id_frag.glsl';\nimport final_frag from './chunks/final_frag.glsl';\nimport theming_decl_frag from './chunks/theming_decl_frag.glsl';\nimport theming_frag from './chunks/theming_frag.glsl';\nimport instancing_decl_vert from './chunks/instancing_decl_vert.glsl';\nimport shadowmap_decl_common from './chunks/shadowmap_decl_common.glsl';\nimport shadowmap_decl_vert from './chunks/shadowmap_decl_vert.glsl';\nimport shadowmap_vert from './chunks/shadowmap_vert.glsl';\nimport shadowmap_decl_frag from './chunks/shadowmap_decl_frag.glsl';\nimport float3_average from './chunks/float3_average.glsl';\nimport line_decl_common from './chunks/line_decl_common.glsl';\nimport prism_wood from './chunks/prism_wood.glsl';\nimport prism_glazing from './chunks/prism_glazing.glsl';\nimport prism_transparency from './chunks/prism_transparency.glsl';\nimport normal_map from './chunks/normal_map.glsl';\nimport decl_point_size from './chunks/decl_point_size.glsl';\nimport point_size from './chunks/point_size.glsl';\nimport wide_lines_decl from './chunks/wide_lines_decl.glsl';\nimport wide_lines_vert from './chunks/wide_lines_vert.glsl';\nimport hsv from './chunks/hsv.glsl';\n\nchunks['pack_depth'] = pack_depth;\nchunks['depth_texture'] = depth_texture;\nchunks['tonemap'] = tonemap;\nchunks['ordered_dither'] = ordered_dither;\nchunks['cutplanes'] = cutplanes;\nchunks['pack_normals'] = pack_normals;\nchunks['hatch_pattern'] = hatch_pattern;\nchunks['env_sample'] = env_sample;\nchunks['id_decl_vert'] = id_decl_vert;\nchunks['id_vert'] = id_vert;\nchunks['id_decl_frag'] = id_decl_frag;\nchunks['id_frag'] = id_frag;\nchunks['final_frag'] = final_frag;\nchunks['theming_decl_frag'] = theming_decl_frag;\nchunks['theming_frag'] = theming_frag;\nchunks['instancing_decl_vert'] = instancing_decl_vert;\nchunks['shadowmap_decl_common'] = shadowmap_decl_common;\nchunks['shadowmap_decl_vert'] = shadowmap_decl_vert;\nchunks['shadowmap_vert'] = shadowmap_vert;\nchunks['shadowmap_decl_frag'] = shadowmap_decl_frag;\nchunks['float3_average'] = float3_average;\nchunks['line_decl_common'] = line_decl_common;\nchunks['prism_wood'] = prism_wood;\nchunks['prism_glazing'] = prism_glazing;\nchunks['prism_transparency'] = prism_transparency;\nchunks['normal_map'] = normal_map;\nchunks['decl_point_size'] = decl_point_size;\nchunks['point_size'] = point_size;\nchunks['wide_lines_decl'] = wide_lines_decl;\nchunks['wide_lines_vert'] = wide_lines_vert;\nchunks['hsv'] = hsv;\n\n/*\n                      * Macros are simple JavaScript functions that can be evaluated from\n                      * within the shader code using a similar syntax as the include directive:\n                      *\n                      *      #name_of_macro<first_param, second_param, third_param, ...>\n                      *\n                      * All parameters are simply passed to the JavaScript code as strings,\n                      * i.e., they are not parsed in any way.\n                      *\n                      * We use this as a way to call the various Prism helper methods (such as\n                      * GetPrismMapsDefinitionChunk below) without having to compose the shader\n                      * code from lists of strings.\n                      */\nvar macros = {};\n\n// If any map type is defined, then do whatever \"content\" is;\n// typically it's \"#define USE_MAP\". In other words, if any map\n// is defined, then USE_MAP will also be defined. This constant\n// is then checked and determines whether a UV variable is defined, etc.\nfunction GetPrismMapsDefinitionChunk(flag) {\n  var def = [\"#if defined( USE_SURFACE_ALBEDO_MAP )\" +\n  \" || defined( USE_SURFACE_ROUGHNESS_MAP )\" +\n  \" || defined( USE_SURFACE_CUTOUT_MAP )\" +\n  \" || defined( USE_SURFACE_ANISOTROPY_MAP )\" +\n  \" || defined( USE_SURFACE_ROTATION_MAP )\" +\n  \" || defined( USE_OPAQUE_ALBEDO_MAP )\" +\n  \" || defined( USE_OPAQUE_F0_MAP )\" +\n  \" || defined( USE_OPAQUE_LUMINANCE_MODIFIER_MAP )\" +\n  \" || defined( USE_LAYERED_BOTTOM_F0_MAP )\" +\n  \" || defined( USE_LAYERED_F0_MAP )\" +\n  \" || defined( USE_LAYERED_DIFFUSE_MAP )\" +\n  \" || defined( USE_LAYERED_FRACTION_MAP )\" +\n  \" || defined( USE_LAYERED_ROUGHNESS_MAP )\" +\n  \" || defined( USE_LAYERED_ANISOTROPY_MAP )\" +\n  \" || defined( USE_LAYERED_ROTATION_MAP )\" +\n  \" || defined( USE_METAL_F0_MAP )\" +\n  \" || defined( USE_SURFACE_NORMAL_MAP )\" +\n  \" || defined( USE_LAYERED_NORMAL_MAP )\",\n  \"#define \" + flag,\n  \"#endif\"].\n  join(\"\\n\");\n  return def;\n}\n\nmacros['prism_check'] = GetPrismMapsDefinitionChunk;\n\n// Set up code for texture access. If USE_SURFACE_ALBEDO_MAP is defined, for example, this texture access code gets executed.\n// If it's not defined, then a simply copy occurs, e.g. \"surfaceAlbedo = surface_albedo;\" from the variableName and mapType.\nexport function GetPrismMapSampleChunk(mapType, variableName, isFloat, linearize) {\n  var suffix = isFloat ? \"_v3\" : \"\";\n  var declare = isFloat ? \"vec3 \" : \"\";\n  var average = isFloat ? variableName + \" = average(\" + variableName + suffix + \");\" : \"\";\n  var colorLinearization = linearize ? variableName + suffix + \" = SRGBToLinear(\" + variableName + suffix + \");\" : \"\";\n  var shader = [\n  \"#if defined( USE_\" + mapType.toUpperCase() + \"_MAP )\",\n  // note: the tiling system needs to modify the uv of the texture per tile, so we use the modified \"uv\" here, not vUv.\n  \"vec2 uv_\" + mapType + \"_map = (\" + mapType + \"_map_texMatrix * vec3(uv, 1.0)).xy;\",\n  mapType.toUpperCase() + \"_CLAMP_TEST;\",\n  declare + variableName + suffix + \" = texture2D(\" + mapType + \"_map, uv_\" + mapType + \"_map).xyz;\",\n  colorLinearization,\n  \"if(\" + mapType + \"_map_invert) \" + variableName + suffix + \" = vec3(1.0) - \" + variableName + suffix + \";\",\n  average,\n  \"#else\",\n  variableName + \" = \" + mapType + \";\",\n  \"#endif\"].\n  join(\"\\n\");\n\n  return shader;\n}\n\nmacros['prism_sample_texture'] = function (mapType, varName, isFloat, linearize) {\n  return GetPrismMapSampleChunk(mapType, varName, isFloat === 'true', linearize === 'true');\n};\n\nexport function GetPrismMapUniformChunk(mapName) {\n\n  var mtxName = mapName + \"_texMatrix\";\n  var mapInvt = mapName + \"_invert\";\n  var macroName = \"USE_\" + mapName;\n\n  var uniforms = [\n  \"#if defined( \" + macroName.toUpperCase() + \" )\",\n  \"uniform sampler2D \" + mapName + \";\",\n  \"uniform mat3 \" + mtxName + \";\",\n  \"uniform bool \" + mapInvt + \";\",\n  \"#endif\"].\n  join(\"\\n\");\n\n  return uniforms;\n}\n\nmacros['prism_uniforms'] = GetPrismMapUniformChunk;\n\nfunction GetPrismBumpMapUniformChunk(mapName) {\n\n  var mtxName = mapName + \"_texMatrix\";\n  var mapScale = mapName + \"_bumpScale\";\n  var mapType = mapName + \"_bumpmapType\";\n  var macroName = \"USE_\" + mapName;\n\n  var uniforms = [\n  \"#if defined( \" + macroName.toUpperCase() + \" )\",\n  \"uniform sampler2D \" + mapName + \";\",\n  \"uniform mat3 \" + mtxName + \";\",\n  \"uniform vec2 \" + mapScale + \";\",\n  \"uniform int \" + mapType + \";\",\n  \"#endif\"].\n  join(\"\\n\");\n\n  return uniforms;\n}\n\nmacros['prism_bump_uniforms'] = GetPrismBumpMapUniformChunk;\n\n// Precompile regexes for the macros\nvar _regExCache = {};\nfor (name in macros) {\n  _regExCache[name] = new RegExp('#' + name + ' *<([\\\\w\\\\d., ]*)>', 'g');\n}\n\n/**\n   * Recursively resolves include directives and macros.\n   * @param {string} source Original shader code.\n   * @returns {string} Shader code with all includes resolved.\n   */\nexport var resolve = function resolve(source) {\n  for (var name in macros) {\n    var re = _regExCache[name];\n    source = source.replace(re, function (match, parens) {\n      var params = parens.split(',').map(function (param) {return param.trim();});\n      return macros[name].apply(null, params);\n    });\n  }\n\n  var pattern = /#include *<([\\w\\d.]+)>/g;\n  var func = function func(match, include) {\n    if (!chunks[include]) {\n      throw new Error('Cannot resolve #include<' + include + '>');\n    }\n    return resolve(chunks[include]);\n  };\n  return source.replace(pattern, func);\n};\n\n// The chunks don't have to be exported anymore, but we keep them\n// for backwards compatibility (they're still referenced in LegacyNamespace.js)\nexport var PackDepthShaderChunk = chunks['pack_depth'];\nexport var TonemapShaderChunk = chunks['tonemap'];\nexport var OrderedDitheringShaderChunk = chunks['ordered_dither'];\nexport var CutPlanesShaderChunk = chunks['cutplanes'];\nexport var PackNormalsShaderChunk = chunks['pack_normals'];\nexport var HatchPatternShaderChunk = chunks['hatch_pattern'];\nexport var EnvSamplingShaderChunk = chunks['env_sample'];\nexport var IdVertexDeclaration = chunks['id_decl_vert'];\nexport var IdVertexShaderChunk = chunks['id_vert'];\nexport var IdFragmentDeclaration = chunks['id_decl_frag'];\nexport var IdOutputShaderChunk = chunks['id_frag'];\nexport var FinalOutputShaderChunk = chunks['final_frag'];\nexport var ThemingFragmentDeclaration = chunks['theming_decl_frag'];\nexport var ThemingFragmentShaderChunk = chunks['theming_frag'];\nexport var InstancingVertexDeclaration = chunks['instancing_decl_vert'];\nexport var ShadowMapDeclareCommonUniforms = chunks['shadowmap_decl_common'];\nexport var ShadowMapVertexDeclaration = chunks['shadowmap_decl_vert'];\nexport var ShadowMapVertexShaderChunk = chunks['shadowmap_vert'];\nexport var ShadowMapFragmentDeclaration = chunks['shadowmap_decl_frag'];\nexport var PointSizeDeclaration = chunks['decl_point_size'];\nexport var PointSizeShaderChunk = chunks['point_size'];\n\nexport var ShaderChunks = {\n  IdUniforms: IdUniforms,\n  ThemingUniform: ThemingUniform,\n  CutPlanesUniforms: CutPlanesUniforms,\n  ShadowMapCommonUniforms: ShadowMapCommonUniforms,\n  ShadowMapUniforms: ShadowMapUniforms,\n  PointSizeUniforms: PointSizeUniforms,\n  WideLinesUniforms: WideLinesUniforms,\n  DepthTextureUniforms: DepthTextureUniforms,\n\n  PackDepthShaderChunk: PackDepthShaderChunk,\n  TonemapShaderChunk: TonemapShaderChunk,\n  OrderedDitheringShaderChunk: OrderedDitheringShaderChunk,\n  CutPlanesShaderChunk: CutPlanesShaderChunk,\n  PackNormalsShaderChunk: PackNormalsShaderChunk,\n  HatchPatternShaderChunk: HatchPatternShaderChunk,\n  EnvSamplingShaderChunk: EnvSamplingShaderChunk,\n  IdVertexDeclaration: IdVertexDeclaration,\n  IdVertexShaderChunk: IdVertexShaderChunk,\n  IdFragmentDeclaration: IdFragmentDeclaration,\n  IdOutputShaderChunk: IdOutputShaderChunk,\n  FinalOutputShaderChunk: FinalOutputShaderChunk,\n  ThemingFragmentDeclaration: ThemingFragmentDeclaration,\n  ThemingFragmentShaderChunk: ThemingFragmentShaderChunk,\n  InstancingVertexDeclaration: InstancingVertexDeclaration,\n  ShadowMapDeclareCommonUniforms: ShadowMapDeclareCommonUniforms,\n  ShadowMapVertexDeclaration: ShadowMapVertexDeclaration,\n  ShadowMapVertexShaderChunk: ShadowMapVertexShaderChunk,\n  ShadowMapFragmentDeclaration: ShadowMapFragmentDeclaration,\n  PointSizeDeclaration: PointSizeDeclaration,\n  PointSizeShaderChunk: PointSizeShaderChunk,\n\n  GetPrismMapSampleChunk: GetPrismMapSampleChunk,\n  GetPrismMapUniformChunk: GetPrismMapUniformChunk,\n\n  resolve: resolve };","import { createShaderMaterial } from './ShaderUtils';\nimport * as THREE from \"three\";\n\nexport var ShaderPass = function ShaderPass(shader, textureID) {\n\n  this.textureID = textureID !== undefined ? textureID : \"tDiffuse\";\n\n  this.material = createShaderMaterial(shader);\n\n  // share uniforms with material\n  this.uniforms = this.material.uniforms;\n\n  this.renderToScreen = false;\n\n  this.enabled = true;\n  this.clear = false;\n\n  this.camera = new THREE.OrthographicCamera(-1, 1, 1, -1, 0, 1);\n\n  //this.quad = new THREE.Mesh( new THREE.PlaneGeometry( 2, 2 ), this.material );\n\n  //Instead of using a screen quad we use a large triangle -- this is slightly\n  //faster (~6% measured in our specific case), due to better cache coherency. See this article:\n  //http://michaldrobot.com/2014/04/01/gcn-execution-patterns-in-full-screen-passes/\n  var triangle = new THREE.BufferGeometry();\n  var p = new Float32Array(9);\n  p[0] = -1;p[1] = -1;p[2] = 0;\n  p[3] = 3;p[4] = -1;p[5] = 0;\n  p[6] = -1;p[7] = 3;p[8] = 0;\n\n  var uv = new Float32Array(6);\n  uv[0] = 0;uv[1] = 0;\n  uv[2] = 2;uv[3] = 0;\n  uv[4] = 0;uv[5] = 2;\n\n  var n = new Float32Array(9);\n  n[0] = 0;n[1] = 0;n[2] = 1;\n  n[3] = 0;n[4] = 0;n[5] = 1;\n  n[6] = 0;n[7] = 0;n[8] = 1;\n\n\n  triangle.addAttribute(\"position\", new THREE.BufferAttribute(p, 3));\n  triangle.addAttribute(\"normal\", new THREE.BufferAttribute(n, 3));\n  triangle.addAttribute(\"uv\", new THREE.BufferAttribute(uv, 2));\n\n  this.quad = new THREE.Mesh(triangle, this.material);\n\n\n  this.scene = new THREE.Scene();\n  this.scene.add(this.quad);\n};\n\nShaderPass.prototype = {\n\n  // note: delta is not used\n  render: function render(renderer, writeBuffer, readBuffer, delta) {\n\n    if (this.uniforms[this.textureID]) {\n\n      this.uniforms[this.textureID].value = readBuffer.texture || readBuffer;\n\n    }\n\n    if (this.renderToScreen || !writeBuffer) {\n\n      renderer.render(this.scene, this.camera);\n\n    } else {\n\n      renderer.render(this.scene, this.camera, writeBuffer, this.clear);\n\n    }\n\n  } };","import * as THREE from \"three\";\n\n/** Create ShaderMaterial instance using a given shader specification\n                                 *\n                                 *   @param {Object} shader - Shader specification E.g., CopyShader. Must provide vertexShader and fragmentShader.\n                                 *                            May provide uniforms, defines, and attributes. See CopyShader for example.\n                                 *   @returns {THREE.ShaderMaterial}\n                                 */\nexport var createShaderMaterial = function createShaderMaterial(shader) {\n  var params = {\n    vertexShader: shader.vertexShader,\n    fragmentShader: shader.fragmentShader };\n\n\n  // only add these fields if the shader actually needs them, because keys with undefined values\n  // would cause errors in THREE.Material\n  if (shader.uniforms) params.uniforms = THREE.UniformsUtils.clone(shader.uniforms);\n  if (shader.defines) params.defines = Object.assign({}, shader.defines);\n  if (shader.extensions) params.extensions = Object.assign({}, shader.extensions);\n\n  // Note that these are shared, because they are usually not modified afterwards\n  if (shader.attributes) params.attributes = shader.attributes;\n\n  return new THREE.ShaderMaterial(params);\n};\n\n/** Add custom macro to given material. Note that macro modification requires expensive shader recompile.\n    *   @param {THREE.Material} material\n    *   @param {string}         macroName\n    *   @param {string}         [macroValue=\"\"]\n    **/\nexport var setMacro = function setMacro(material, macroName, macroValue) {\n\n  // default to \"\" (for simple toggles)\n  macroValue = macroValue || \"\";\n\n  // create defines object if needed\n  if (!material.defines) {\n    material.defines = {};\n  }\n\n  // change macro and trigger update if needed\n  if (material.defines[macroName] != macroValue) {\n    material.defines[macroName] = macroValue;\n    material.needsUpdate = true;\n  }\n};\n\n/** Remove custom macro to given material. Note that macro modification requires expensive shader recompile.\n    *   @param {THREE.Material} material\n    *   @param {string}         macroName\n    **/\nexport var removeMacro = function removeMacro(material, macroName) {\n\n  // skip material update if nothing changed\n  if (material.defines || material.defines[macroName]) {\n\n    // Note that we cannot just assign undefined here, because this would\n    // produce a \"#define <MACRONAME> undefined\" string in the shader (see FireFlyWebGlProgram.js)\n    // Fortunately, removing macros doesn't happen per-frame, and it requires shader-recompile anyway.\n    delete material.defines[macroName];\n\n    material.needsUpdate = true;\n  }\n};\n\n\nexport var ShaderUtils = {\n  createShaderMaterial: createShaderMaterial,\n  setMacro: setMacro,\n  removeMacro: removeMacro };","import { ShaderChunks as chunks } from './ShaderChunks';\nimport { createShaderMaterial, setMacro, removeMacro } from './ShaderUtils';\nimport { GetPrismMapUniforms } from './PrismUtil';\nimport { GetPrismMapChunk } from './WebGLProgram';\nimport { createGroundShape, setGroundShapeTransform } from './GroundShadow';\nimport { GaussianPass } from './GaussianPass';\nimport { RenderFlags } from '../scene/RenderFlags';\nimport * as THREE from \"three\";\n\nimport shadowmap_vert from './shaders/shadowmap_vert.glsl';\nimport shadowmap_frag from './shaders/shadowmap_frag.glsl';\nimport shadowmap_ground_vert from './shaders/shadowmap_ground_vert.glsl';\nimport shadowmap_ground_frag from './shaders/shadowmap_ground_frag.glsl';\n\n//\n// All shaders related to shadow mapping.\n//\n// Material shader chunks are only active if the USE_SHADOWMAP macro is set and have no effect otherwise.\n// Default values for constant uniforms are specified in ShadowMap.js.\n//\n// How to add shadow-mapping to a material shader:\n//  1. Add ShadowMapDeclareUniforms to uniforms\n//  2. Add ShadowMapVertexDeclaration to the vertex-shader declarations\n//  3. Make sure that these variables are available in the vertex-shader:\n//      - vec3 position;            // vertex-position in model-coords\n//      - uniform mat4 modelMatrix;\n//  4. Add ShadowMapVertexShaderChunk to the vertex-shader.\n//  5. Add ShadowMapFragmentDeclarion to the fragment-shader declarations\n//  6. Now, you can use getShadowValue() in your fragment shader to get the\n//     shadow attenuation value. (see function comment for details)\n//     If the USE_SHADOWMAP macro is not set, it is replaced by a dummy implementation.\n\n// Shader to render into the shadow map\nexport var ShadowMapShader = {\n\n  uniforms: THREE.UniformsUtils.merge([\n\n  chunks.ShadowMapCommonUniforms,\n  {\n    // all values are set in ShadowMaps.js\n    \"shadowMapRangeMin\": { type: \"f\", value: 0.0 },\n    \"shadowMapRangeSize\": { type: \"f\", value: 0.0 },\n    \"shadowMinOpacity\": { type: \"f\", value: 0.0 },\n\n    // uniforms needed to use texture sample chunks for Phong\n    \"map\": { type: \"t\", value: null },\n    \"alphaMap\": { type: \"t\", value: null },\n    \"texMatrix\": { type: \"m3\", value: new THREE.Matrix3() },\n    \"texMatrixAlpha\": { type: \"m3\", value: new THREE.Matrix3() } },\n\n  // uniforms needed to use texture sample chunks for Prism\n  GetPrismMapUniforms(\"surface_cutout_map\")]),\n\n\n  vertexShader: shadowmap_vert,\n  fragmentShader: shadowmap_frag };\n\n\n// Shader to render ground-shadow based on shadow-map.\n// Unlike other shadow receivers, the ground plane itself is not visible - just its shadow is rendered.\nexport var GroundShadowShader = {\n\n  uniforms: chunks.ShadowMapUniforms,\n\n  vertexShader: shadowmap_ground_vert,\n  fragmentShader: shadowmap_ground_frag };\n\n\n/**\n                                            * ShadowMapOverrideMaterials is used by ShadowMaps to support cutout maps and transparency of individual shapes\n                                            * when rendering into the shadow map.\n                                            *\n                                            * This class manages several customized variants of the shadow map shader material. The goal is:\n                                            *  - Fully Invisible/Transparent objects will be excluded (based on threshold)\n                                            *  - Prism cutout maps, alpha maps, and alpha channels of rgba maps are considered by override effects.\n                                            * @constructor\n                                            */\nexport function ShadowMapOverrideMaterials() {\n\n  // contains different macro variant of ShadowMapShader to avoid frequent shader recompile.\n  // indexed by material key (see MaterialFlags.getMaterialIndex() below)\n  // Each effect is reused with different uniforms.\n  var _cachedMaterials = [];\n\n  // used to derive new effect variants that already know the latest state of common shadow-map uniforms\n  var _prototypeMaterial = createShaderMaterial(ShadowMapShader);\n\n  // dummy material to exclude shapes completely\n  var _invisibleMaterial = new THREE.Material();\n  _invisibleMaterial.visible = false;\n\n  // reused array of decal objects. (see getCustomOverrideMaterial)\n  var _overrideDecals = [];\n\n  // flags to determine which macro-configuration of the override material is needed\n  function MaterialFlags() {\n\n    this.init = function () {\n      this.isPrism = false;\n      this.alphaMap = false; // for Prism, this flag is used for the cutout map\n      this.alphaClampS = false;\n      this.alphaClampT = false;\n      this.alphaInvert = false;\n      this.rgbaMap = false;\n      this.rgbaClampS = false;\n      this.rgbaClampT = false;\n      this.rgbaInvert = false;\n      this.instanced = false; // for geometry with per-instance transform\n\n      // Even if the flags above are equal, we cannot reuse the same\n      // override material for different decals: They are\n      // used at the same time but may need different uniforms for the cutout_maps.\n      // Therefore, we use the decal index to make sure that decal effects are\n      // always independent.\n      this.decalIndex = -1;\n    };\n\n    this.init();\n\n    // get a unique index for this flag combination\n    this.getMaterialIndex = function () {\n      // Note: When returning the term here directly, i.e., writing \"return\" instead of \"var index =\",\n      //       the result would be undefined. The reason is a trap in JS: If a line only contains a single\n      //       \"return\" statement, JS \"helpfully\" adds a ; automatically and ignores the rest.\n      var index =\n      (this.isPrism ? 0x01 : 0) | (\n      this.alphaMap ? 0x02 : 0) | (\n      this.alphaClampS ? 0x04 : 0) | (\n      this.alphaClampT ? 0x08 : 0) | (\n      this.alphaInvert ? 0x10 : 0) | (\n      this.rgbaMap ? 0x20 : 0) | (\n      this.rgbaClampS ? 0x40 : 0) | (\n      this.rgbaClampT ? 0x80 : 0) | (\n      this.rgbaInvert ? 0x100 : 0) | (\n      this.instanced ? 0x200 : 0) |\n      (this.decalIndex + 1) * 0x400; // enforce different keys for different decals\n      return index;\n    };\n  }\n\n  // reused temp object\n  var _tmpFlags = new MaterialFlags();\n\n  // Creates an appropriate override material or gets it from cache.\n  //  @param   {MaterialFlags}        flags\n  //  @param   {Number}               [decalIndex] - make sure that different decals always use different\n  //                                                 override materials.\n  //  @returns {THREE.ShaderMaterial}\n  function acquireOverrideMaterial(flags, decalIndex) {\n\n    var key = flags.getMaterialIndex();\n    if (!_cachedMaterials[key]) {\n      // Note:\n      //  - Cloning the prototype makes sure that common shadowmap shader uniforms are also known by new effects.\n      //  - Although we are sometimes creating the same ShaderMaterial here, separate caching still makes sense,\n      //    because FireFlyWebGLProgram will compile different variants depending for each one.\n      //    E.g., with/without USE_ALPHAMAP macro or with different GET_MAP chunks, depending on clamp settings.\n      var newEffect = _prototypeMaterial.clone();\n\n      // set macro to indicate that we must use prism shader chunks to sample the cutout map\n      if (flags.isPrism && flags.alphaMap) {\n        setMacro(newEffect, \"USE_SURFACE_CUTOUT_MAP\");\n\n        // prepend SURFACE_CUTOUT_CLAMP macro function\n        // For Prism materials, FireFlyWebGL does this automatically. But for the shadow map shader, we\n        // have to do it ourselves here.\n        newEffect.fragmentShader =\n        GetPrismMapChunk(\"surface_cutout\", flags.alphaClampS, flags.alphaClampT) +\n        \"\\n\" +\n        newEffect.fragmentShader;\n      }\n\n      // acitvate hardware instancing\n      if (flags.instanced) {\n        newEffect.useInstancing = true;\n      }\n\n      _cachedMaterials[key] = newEffect;\n    }\n    return _cachedMaterials[key];\n  }\n\n  // determines whether a material should be excluded from shadow-map rendering\n  //  @param {THREE.Material} mat\n  //  @returns {bool}\n  function isInvisibleOrTransparent(mat) {\n\n    if (mat instanceof THREE.MeshPhongMaterial) {\n      // Phong shaders take opacity directly from the material property\n      return mat.opacity < ShadowConfig.ShadowMinOpacity;\n    } else if (mat.isPrismMaterial) {\n      // For transparent prism materials, the surface opacity may actually vary per fragment depending on\n      // surface orientation and roughness texture. Since we can only make binary decisions in the\n      // shadow map shader, it's better to exclude those shapes completely. Otherwise, they would\n      // rather cast random pixel artifacts than actual shadows.\n      return mat.prismType === 'PrismTransparent' || mat.prismType === 'PrismGlazing';\n    } else if (!mat.visible) {\n      // the original material is set to invisble already\n      return true;\n    }\n\n    // If we reach this, we don't know anything about transparency.\n    // Therefore, we assume it to be relevant.\n    return false;\n  }\n\n  // runs a function cb(material) for each override material variant.\n  this.forEachMaterial = function (cb) {\n\n    // run for all cached effects\n    for (var i = 0; i < _cachedMaterials.length; i++) {\n      var mat = _cachedMaterials[i];\n      if (mat) {\n        cb(mat);\n      }\n    }\n\n    // apply on prototype, so that new materials inherit changes\n    cb(_prototypeMaterial);\n\n    // The _invisibleMaterial is excluded here, for two reasons:\n    //  1. It is rather a cached constant without any configuration.\n    //  2. By excluding it, we can safely assume that all materials are variants of\n    //     the ShadowMapShader, so that all expected uniforms exist etc.\n  };\n\n  // Returns a custom override effect if needed for the given shape material.\n  //  @param {THREE.Material}  origMat      - the original material of the shape to be rendered.\n  //  @param {Number}          [decalIndex] - if orgigMat is from a decal, this must be its index in the decal array\n  //  @returns {null|THREE.Material} returns null if the default override effect can be used.\n  function getOverrideMaterial(origMat, decalIndex) {\n\n    // handle overall transparency\n    if (isInvisibleOrTransparent(origMat)) {\n      return _invisibleMaterial;\n    }\n\n    // check for texture alpha\n    var isPhong = origMat instanceof THREE.MeshPhongMaterial;\n    var isPrism = origMat.isPrismMaterial;\n    if (!isPhong && !isPrism) {\n      // cutout/alpha maps are only supported for phong and prism materials\n      return null;\n    }\n\n    // check for alpha/cutout map\n    var alphaMap = isPhong ? origMat.alphaMap : origMat[\"surface_cutout_map\"];\n\n    // check for opacity in rgba map (phong only)\n    // we ignore the map is alphaTest is not set.\n    var rgbaMap = isPhong && !!origMat.alphaTest ? origMat.map : null;\n\n    if (!alphaMap && !rgbaMap && !origMat.useInstancing) {\n      // no custom effect needed\n      return null;\n    }\n\n    var flags = _tmpFlags;\n    flags.init();\n    flags.isPrism = isPrism;\n    flags.alphaMap = !!alphaMap;\n    flags.rgbaMap = !!rgbaMap;\n    flags.instanced = origMat.useInstancing;\n    flags.decalIndex = decalIndex === undefined ? -1 : decalIndex;\n\n    // configure clamp & invert flags for alpha map\n    if (alphaMap) {\n      // These properties are set for all textures - no matter if Prism or Phong.\n      // (see convertSimpleTexture/convertPrismTexture in MaterialConverter.js)\n      flags.alphaClampS = alphaMap.clampS;\n      flags.alphaClampT = alphaMap.clampT;\n      flags.alphaInvert = alphaMap.invert;\n    }\n\n    // same for rgba map\n    if (rgbaMap) {\n      flags.rgbaClampS = rgbaMap.clampS;\n      flags.rgbaClampT = rgbaMap.clampT;\n      flags.rgbaInvert = rgbaMap.invert;\n    }\n\n    // get material for current macro-combination\n    var override = acquireOverrideMaterial(flags, decalIndex);\n\n    // configure uniforms\n    if (alphaMap) {\n      if (isPhong) {\n        override.uniforms[\"alphaMap\"].value = alphaMap;\n        override.uniforms[\"texMatrixAlpha\"].value = alphaMap.matrix;\n\n        // This lets WebGLRenderer set the USE_ALPHAMAP macro and allow the shader to use GET_ALPHAMAP\n        // to handle clamping and invert. Note that we still need to set the uniforms above,\n        // because the renderer does not call refreshUniformsCommon() for generic ShaderMaterials.\n        override.alphaMap = alphaMap;\n\n        // Get singe/double side setting from original material\n        override.side = origMat.side;\n      } else {\n        // use prism uniforms for this case, so that we can reuse the prism sampling chunk\n        override.uniforms[\"surface_cutout_map\"].value = alphaMap;\n        override.uniforms[\"surface_cutout_map_texMatrix\"].value.copy(alphaMap.matrix);\n        override.uniforms[\"surface_cutout_map_invert\"].value = alphaMap.invert;\n\n        // Workaround: Double-sided materials are currently only supported for Phong materials\n        // (via \"generic_backface_cull\" property, see MaterialConverter.js), i.e., Prism materials\n        // always seem to be single-sided. When using cutouts, you usually don't have closed surfaces.\n        // Therefore, the camera and the shadow camera may see the cutout surface from different\n        // directions - which looks confusing because either shadow or surface itself seems to be missing.\n        // A cleaner solution would be to support double-sided for Prism as well. Then, we could\n        // just set override.side = origMat.side like for Phong here.\n        override.side = THREE.DoubleSide;\n      }\n    }\n\n    // the same for alpha maps (Phong only)\n    if (rgbaMap) {\n      override.uniforms[\"map\"].value = rgbaMap;\n      override.uniforms[\"texMatrix\"].value = rgbaMap.matrix;\n      override.map = rgbaMap;\n    }\n\n    return override;\n  }\n\n  // Returns a custom override effect if needed for the given shape material - including decals if needed.\n  //  @param {THREE.Material}  origMat - the original material of the shape to be rendered.\n  //  @returns {null|THREE.Material} returns null if the default override effect can be used.\n  this.getCustomOverrideMaterial = function (origMat) {\n\n    // check if this shape material requires a custom override material\n    var override = getOverrideMaterial(origMat);\n\n    // If no custom override is needed, the shape can be assumed to be fully opaque.\n    // Decals cannot change this, so we can ignore them and just use the default shadow-map shader.\n    if (!override) {\n      return null;\n    }\n\n    // If there are no decals, just use the override material\n    if (!origMat.decals) {\n      override.decals = null;\n      return override;\n    }\n\n    // Since override is not null, the main material is (maybe partially) transparent. In this case,\n    // any decal may contribute to the shape opacity by defining separate cutouts.\n    // Therefore, we have to add corresponding decals to the override material as well.\n    if (origMat.decals) {\n\n      _overrideDecals.length = 0;\n\n      // for each original decal, add a corresponding one to the override material\n      for (var i = 0; i < origMat.decals.length; i++) {\n        var decal = origMat.decals[i];\n\n        // get override effect for this decal\n        var decalOverride = getOverrideMaterial(decal.material, i);\n\n        if (!decalOverride) {\n          // if this decal does not need a custom override, it is fully opaque.\n          // In this case, the whole shape is rendered to the shadow map anyway and\n          // we don't need the decals at all.\n          return null;\n        }\n\n        // this decal may contribute to the overall shape opacity.\n        // Therefore, we add a corresponding decal to the override matierial as well.\n        _overrideDecals.push({\n          uv: decal.uv, // share original uv,\n          material: decalOverride // but with shadowmap material\n        });\n      }\n    }\n\n    // attach temporary override decals to main override effect\n    override.decals = _overrideDecals;\n\n    return override;\n  };\n\n  // dispose all owned GPU resources\n  this.dispose = function () {\n    // dispose all ShaderMaterials\n    this.forEachMaterial(\n    function (mat) {\n      mat.dispose();\n    });\n\n    // Note that _invisibleMaterial does not need dispose, because it is always skipped\n    // by the renderer anyway.\n  };\n}\n\n// Toggles and constants\nexport var ShadowConfig = {\n  // Tweakable constants\n  ShadowMapSize: 1024,\n  ShadowESMConstant: 80.0,\n  ShadowBias: 0.001,\n  ShadowDarkness: 0.7, // shadow intensity. 0.0 => no shadows.\n  ShadowMapBlurRadius: 4.0,\n\n  ShadowMinOpacity: 0.9, // shapes below this opacity are excluded from shadowmap, i.e. do not cast shadows\n\n  // Debug toggles\n  UseHardShadows: false, // Fallback to simple hard shadows - helpful to debug artifacts\n  BlurShadowMap: true };\n\n\n// Enum for different states of the shadow map during progressive rendering\nexport var SHADOWMAP_NEEDS_UPDATE = 0;\nexport var SHADOWMAP_INCOMPLETE = 1;\nexport var SHADOWMAP_VALID = 2;\n\n// ShadowParams defines all parameters needed by material shaders to access the shadow map.\nfunction ShadowParams() {\n\n  this.shadowMap = undefined;\n  this.shadowMapSize = undefined;\n  this.shadowMatrix = undefined;\n  this.shadowLightDir = undefined;\n\n  /** @param {THREE.WebGLRenderTarget} */\n  this.init = function (target) {\n    this.shadowMap = target;\n    this.shadowMapSize = new THREE.Vector2(target.width, target.height);\n    this.shadowMatrix = new THREE.Matrix4();\n    this.shadowLightDir = new THREE.Vector3();\n  };\n\n  /** Set (or remove) uniforms and defines for a material, so that it uses the current shadow map\n      *   @param {THREE.Material} mat\n      */\n  this.apply = function (mat) {\n\n    mat.shadowMap = this.shadowMap;\n    mat.shadowMatrix = this.shadowMatrix;\n    mat.shadowLightDir = this.shadowLightDir;\n\n    // add/remove shadow-map macro\n    if (this.shadowMap) {\n      setMacro(mat, \"USE_SHADOWMAP\");\n      if (ShadowConfig.UseHardShadows) {\n        setMacro(mat, \"USE_HARD_SHADOWS\");\n      }\n    } else {\n      removeMacro(mat, \"USE_SHADOWMAP\");\n      removeMacro(mat, \"USE_HARD_SHADOWS\");\n    }\n\n    // Note that mat.needsUpdate is not needed here and would cause an expensive shader-recompile.\n    // It is only called when the macro changes (see add/removeMacro).\n  };\n}\n\n// NoShadows.apply() removes all shadow-map properties from a material.\nvar NoShadows = new ShadowParams();\n\n/** @class Main class to manage ShadowMaps. Responsible for\n                                     *   - creating and updating the shadow map\n                                     *   - support progressive rendering of shadow maps\n                                     *   - update materials to give them access to the shadow map.\n                                     *   - rendering the ground shadow (a transparent plane where only shadow is visible)\n                                     *\n                                     *  How to use it: The main steps to update a shadow map are:\n                                     *   - beginShadowMapUpdate:  prepares the shadow map rendering (clear target, setup camera etc.)\n                                     *   - renderIntoShadowMap:   called for all scenes to be rendered into the shadow map, so that they cast shadows.\n                                     *   - finishShadowMapUpdate: Makes the rendered shadow-map available to all materials.\n                                     *\n                                     *  To support progressive rendering, there are two higher-level functions that work with RenderScene and\n                                     *  use the functions above:\n                                     *   - startUpdate:    Reset render scene to start progressive rendering of the RenderScene into the shadow map\n                                     *   - continueUpdate: Render more stuff into the shadow map. After calling, there are two possible results:\n                                     *                      a) Finished: ShadowMap is ready and materials are configured to use it.\n                                     *                      b) Timeout:  ShadowMaps are temporarily disabled for all materials. More continueUpdate()\n                                     *                                   calls are needed next frame.\n                                     *                     Use this.state to check whether the shadow map is finished.\n                                     **/\nexport function ShadowMaps(glRenderer) {\n\n  var _shadowParams = null;\n  var _gaussianPass = null;\n  var _shadowCamera = new THREE.OrthographicCamera();\n\n  // maximum possible value for exponential shadow map\n  var _ESMMaxValue = Math.exp(ShadowConfig.ShadowESMConstant);\n\n  // set clear color to maximum possible value in the shadow map\n  var _clearColor = ShadowConfig.UseHardShadows ? new THREE.Color(1, 1, 1) : new THREE.Color(_ESMMaxValue, 1.0, 1.0);\n\n  var _renderer = glRenderer;\n\n  // ground-shadow\n  var _groundMaterial = null; // {THREE.ShaderMaterial} ShaderMaterial to render plane with transparent shadow\n  var _groundShape = null; // {THREE.Mesh}           ground plane geometry\n  var _groundScene = null; // {THREE.Scene}          scene containing _groundShape\n\n  // material used to render into shadow map\n  var _shadowMapMaterial = createShaderMaterial(ShadowMapShader);\n\n  // attach a callback for _shadowMapMaterial that provides custom variants used for cutout maps and to exclude invisible shapes\n  var _customOverrideMaterials = new ShadowMapOverrideMaterials();\n  _shadowMapMaterial.getCustomOverrideMaterial = _customOverrideMaterials.getCustomOverrideMaterial;\n\n  // dummy 1x1 pixel shadow-map that we use to temporarily hide shadows during shadow-map update.\n  // switching off shadows instead would require to recompile a lot of material shaders.\n  var _dummyShadowMap = null; // {THREE.WebGLRenderTarget}\n\n\n  //\n  // --- Some local helper functions ----\n  //\n\n  /** Apply shadow params to all materials\n   *   @param {ShadowParams}\n   */\n  function setShadowParams(matman, params) {\n    matman.forEach(function (m) {\n      params.apply(m);\n    });\n  }\n\n\n  // @param {Number} size - widht/height of shadow target\n  function createShadowTarget(size) {\n    var target = new THREE.WebGLRenderTarget(size, size,\n    { minFilter: THREE.LinearFilter,\n      magFilter: THREE.LinearFilter,\n      format: THREE.RGBAFormat,\n      type: THREE.FloatType,\n      stencilBuffer: false,\n      generateMipmaps: false });\n\n    // TODO: generateMipmaps is ignored in the option struct\n    target.generateMipmaps = false;\n    return target;\n  }\n\n  // param {THREE.WebGLRenderTarget}\n  function clearShadowMap(target) {\n    _renderer.setRenderTarget(target);\n    _renderer.setClearColor(_clearColor, 1.0);\n    _renderer.clear();\n  }\n\n  // make all materials use _dummyShadowMap.\n  // @param {MaterialManager} matman\n  function hideShadows(matman) {\n    // replace actual shadow map by dummy shadow map\n    var shadowMap = _shadowParams.shadowMap;\n    _shadowParams.shadowMap = _dummyShadowMap;\n\n    // update all materials\n    setShadowParams(matman, _shadowParams);\n    _shadowParams.apply(_groundMaterial);\n\n    // set _shadowParams back to actual target\n    _shadowParams.shadowMap = shadowMap;\n  }\n\n  /** Configures the given shadow ortho camera to fit the given worldBox.\n     *   @param {THREE.OrthographicCamera} cam      - camera to be configured\n     *   @param {THREE.Box3}                worldBox - worldBox of the scene that have to be captured by the camera\n     *   @param {THREE.Vector3}             lightDir - direction from which the DirectionalLight comes\n     */\n  var fitShadowCam = function () {\n    // lookAt for shadowCamera. Rotates (0,0,-1) to shadowCam direction\n    var _lookAtMatrix = new THREE.Matrix4();\n\n    // inverse lookAt. Rotates shadowCam direction to (0,0,-1)\n    var _lookAtInverse = new THREE.Matrix4();\n\n    // we always use origin as light target\n    var _origin = new THREE.Vector3(0, 0, 0);\n\n    // bbox to define shadow-camera frustum\n    var _shadowBox = new THREE.Box3();\n\n    // shadow-camera position in world-space\n    var _shadowCamPos = new THREE.Vector3();\n\n    // temp use\n    var _tmp = new THREE.Vector3();\n\n    return function (cam, worldBox, lightDir) {\n\n      // let initial camera look from light position towards target (pos will be adjusted afterwards)\n      cam.position.copy(lightDir);\n      cam.lookAt(_origin);\n      _lookAtMatrix.makeRotationFromQuaternion(cam.quaternion);\n      _lookAtInverse.getInverse(_lookAtMatrix);\n\n      // rotate worldBox to shadow-camera space\n      // Note that we need the inverse to transform from worldSpace to shadowCam space\n      _shadowBox.copy(worldBox).applyMatrix4(_lookAtInverse);\n\n      // get final shadowCam pos in worldCoords: We choose the center of maxZ face.\n      // Note that in camera space, view direction is -z, i.e., +z is pointing towards the camera.\n      _tmp = _shadowBox.center(_tmp);\n      _shadowCamPos.set(_tmp.x, _tmp.y, _shadowBox.max.z);\n      _shadowCamPos.applyMatrix4(_lookAtMatrix);\n      cam.position.copy(_shadowCamPos);\n\n      // derive ortho-frustum extent from bbox.\n      _tmp = _shadowBox.size(_tmp);\n      cam.left = -0.5 * _tmp.x;\n      cam.right = 0.5 * _tmp.x;\n      cam.bottom = -0.5 * _tmp.y;\n      cam.top = 0.5 * _tmp.y;\n      cam.near = 0.0;\n      cam.far = _tmp.z;\n\n      // update all affected matrices\n      cam.updateMatrixWorld();\n      cam.matrixWorldInverse.getInverse(cam.matrixWorld);\n      cam.updateProjectionMatrix();\n    };\n  }();\n\n  /** Sets parameters needed for the Shader to render into the shadow map.\n         *  @param {THREE.Material} mat\n         */\n  function setShadowMapShaderParams(mat) {\n    mat.uniforms[\"shadowMapRangeMin\"].value = _shadowCamera.near;\n    mat.uniforms[\"shadowMapRangeSize\"].value = _shadowCamera.far - _shadowCamera.near;\n    mat.uniforms[\"shadowESMConstant\"].value = ShadowConfig.ShadowESMConstant;\n    mat.uniforms[\"shadowMinOpacity\"].value = ShadowConfig.ShadowMinOpacity;\n  }\n\n  //\n  // --- Initialization ---\n  //\n  this.init = function () {\n\n    // init shadow params\n    _shadowParams = new ShadowParams();\n    _shadowParams.init(createShadowTarget(ShadowConfig.ShadowMapSize));\n\n    // Note that the gauss pass creates its own target - which must use the same format and type as the shadow map.\n    _gaussianPass = ShadowConfig.BlurShadowMap ? new GaussianPass(ShadowConfig.ShadowMapSize, ShadowConfig.ShadowMapSize, ShadowConfig.ShadowMapBlurRadius, 1.0, {\n      type: _shadowParams.shadowMap.type,\n      format: _shadowParams.shadowMap.format }) :\n    undefined;\n\n    // ground shadow material\n    _groundMaterial = createShaderMaterial(GroundShadowShader);\n    _groundMaterial.depthWrite = false;\n    _groundMaterial.transparent = true;\n\n    // ground shadow shape\n    _groundShape = createGroundShape(_groundMaterial);\n    _groundScene = new THREE.Scene();\n    _groundScene.add(_groundShape);\n\n    // needed from outside to adjust far-plane\n    this.groundShapeBox = new THREE.Box3();\n\n    // dummy 1x1 pixel shadow-map that we use to temporarily hide shadows during shadow-map update.\n    // switching off shadows instead would require to recompile a lot of material shaders.\n    _dummyShadowMap = createShadowTarget(1);\n    clearShadowMap(_dummyShadowMap);\n  };\n  this.init();\n\n  //\n  // --- Main functions for progressive shadow map update ---\n  //\n\n  // used to manage state of the shadow-map for progressive update.\n  this.state = SHADOWMAP_NEEDS_UPDATE;\n\n  /** Clears the shadow map and prepares shadow camera and model for rendering. If possible within the given\n                                        *  frame time, the shadow map will already be finished after calling this function. (use this.state to check).\n                                        *  If not, more calls to continueUpdate() are needed in subsequent frames.\n                                        *\n                                        *  @param {RenderScene}     modelQueue     - Used for progressive rendering into shadow map.\n                                        *  @param {Number}          frameRemaining - Frame budget in milliseconds\n                                        *  @param {THREE.Camera}    camera         - Main camera for scene rendering\n                                        *  @param {THREE.Vector3}   lightDir       - points to the direction where the light comes from (world-space)\n                                        *  @param {MaterialManager} matman\n                                        */\n  this.startUpdate = function (modelQueue, frameRemaining, camera, lightDir, matman) {\n\n    // clear shadow map and setup shadow map camera\n    var worldBox = modelQueue.getVisibleBounds(true);\n    this.beginShadowMapUpdate(camera, worldBox, lightDir);\n\n    // reset queue to start progressive render into shadow map\n    modelQueue.reset(_shadowCamera, RenderFlags.RENDER_SHADOWMAP, true);\n\n    // state is in progress. This may change in the call below if the shadow\n    // map can be fully rendered at once.\n    this.state = SHADOWMAP_INCOMPLETE;\n\n    // try to render the whole shadow map immediately in the given frame time.\n    frameRemaining = this.continueUpdate(modelQueue, frameRemaining, matman);\n\n    return frameRemaining;\n  };\n\n  /** Continues to render into the shadow map. startUpdate must have been called before.\n      *   @param {RenderScene}     modelQueue\n      *   @param {Number}          frameRemaining - available frame time budget in milliseconds\n      *   @param {MaterialManager} matman\n      *   @returns {Number} remaining frame time\n      *\n      *  Note: If other tasks call q.renderSome() or q.reset() on the modelQueue while the shadow-map update is in progress,\n      *        the shadow map update has to be restarted. */\n  this.continueUpdate = function (modelQueue, frameRemaining, matman) {\n\n    // render some more scenes into shadow map\n    frameRemaining = modelQueue.renderSome(this.renderSceneIntoShadowMap, frameRemaining);\n\n    // if shadow map rendering is already finished, let's use it in this frame already\n    if (modelQueue.isDone()) {\n      this.state = SHADOWMAP_VALID;\n      this.finishShadowMapUpdate(matman);\n    } else {\n      // model is too big to render shadow map in a single frame.\n      // Hide shadows until shadow map update is finished.\n      hideShadows(matman);\n    }\n    return frameRemaining;\n  };\n\n  ///\n  /// --- Core functions for shadow-map update ---\n  ///\n\n  /** Clear shadow target and initialize shadow camera.\n   *   @param {THREE.Camera}  camera\n   *   @param {THREE.Box3}    worldBox\n   *   @param {THREE.Vector3} lightDir - points to the direction where the light comes from (world-space)\n   */\n  this.beginShadowMapUpdate = function (camera, worldBox, lightDir) {\n\n    fitShadowCam(_shadowCamera, worldBox, lightDir);\n\n    // update shadowmap shader params\n    setShadowMapShaderParams(_shadowMapMaterial);\n    _customOverrideMaterials.forEachMaterial(setShadowMapShaderParams);\n\n    // activate hard-shadows fallback if enabled\n    if (ShadowConfig.UseHardShadows) {\n      setMacro(_shadowMapMaterial, \"USE_HARD_SHADOWS\");\n      _customOverrideMaterials.forEachMaterial(\n      function (mat) {\n        setMacro(mat, \"USE_HARD_SHADOWS\");\n      });\n\n    }\n\n    clearShadowMap(_shadowParams.shadowMap);\n\n    // render ground shape into shadow map. Although the ground will usually only receive shadow\n    // and not cast it, this is necessary to avoid artifacts with exponential shadow mapping,\n    // because the smoothing usually fails at the boundary to clear-color (=maxDepth) pixels in the shadow map.\n    this.renderSceneIntoShadowMap(_groundScene);\n  };\n\n  /** @param {THREE.Scene} scene */\n  this.renderSceneIntoShadowMap = function (scene) {\n    scene.overrideMaterial = _shadowMapMaterial;\n\n    _renderer.render(scene, _shadowCamera, _shadowParams.shadowMap);\n\n    scene.overrideMaterial = null;\n  };\n\n  /** @param {MaterialManager} matman */\n  this.finishShadowMapUpdate = function (matman) {\n\n    // Note that the gaussianPass has its own intermediate target, so that it's okay\n    // to use the same target for input and output.\n    if (_gaussianPass && !ShadowConfig.UseHardShadows) {\n      _gaussianPass.render(_renderer, _shadowParams.shadowMap, _shadowParams.shadowMap);\n    }\n\n    // compute shadowMatrix param: It maps world-coords to NDC for the shadow-camera\n    _shadowParams.shadowMatrix.multiplyMatrices(_shadowCamera.projectionMatrix, _shadowCamera.matrixWorldInverse);\n    _shadowParams.shadowMapRangeMin = _shadowCamera.near;\n    _shadowParams.shadowMapRangeSize = _shadowCamera.far - _shadowCamera.near;\n    _shadowParams.shadowLightDir.copy(_shadowCamera.position).normalize();\n\n    // update param on all materials\n    setShadowParams(matman, _shadowParams);\n\n    // update our own ground shadow shader\n    _shadowParams.apply(_groundMaterial);\n\n    this.isValid = true;\n  };\n\n  /**\n      *  Dispose GPU resources of ShadowMaps.\n      *  @param {MaterialManager} matman\n      **/\n  this.cleanup = function (matman) {\n\n    if (_gaussianPass) {\n      _gaussianPass.cleanup();\n    }\n    if (_shadowParams.shadowMap) {\n      _shadowParams.shadowMap.dispose();\n    }\n\n    // remove all shadow-map params from materials\n    setShadowParams(matman, NoShadows);\n\n    // dispose shader for shadow-map rendering\n    _shadowMapMaterial.dispose();\n    _customOverrideMaterials.dispose();\n\n    // dispose ground shape\n    _groundMaterial.dispose();\n    _groundShape.geometry.dispose();\n\n    // TODO: Probably LmvShaderPasses should get cleanup() functions as well to dispose targets and geometry?\n  };\n\n  ///\n  /// --- Ground shadow rendering ---\n  ///\n\n  this.setGroundShadowTransform = function () {\n    return function (center, size, worldUp, rightAxis) {\n      // update shape transform\n      setGroundShapeTransform(_groundShape, center, size, worldUp, rightAxis);\n\n      // expose ground shape box (needed for far-plane adjustment)\n      this.groundShapeBox.setFromObject(_groundShape);\n    };\n  }();\n\n  this.renderGroundShadow = function (camera, target) {\n    _renderer.render(_groundScene, camera, target, false);\n  };\n\n  /** Returns a corner of the bbox, enumerating from 0=minPoint to 7=maxPoint.\n      * @param {THREE.Box3}    box\n      * @param {Number}        index - in [0,7]\n      * @param {THREE.Vector3} [optionalTarget]\n      * @returns {THREE.Vector3}\n      */\n  function getBoxCorner(box, index, optionalTarget) {\n    var result = optionalTarget || new THREE.Vector3();\n    result.x = index & 1 ? box.max.x : box.min.x;\n    result.y = index & 2 ? box.max.y : box.min.y;\n    result.z = index & 4 ? box.max.z : box.min.z;\n    return result;\n  }\n\n  /** Expands the given box in xz by its ground shadow, assuming a ground plane { y = inoutBox.min.y } .\n     *   @param {THREE.Box3}    inoutBox  - box to be expanded.\n     *   @param {THREE.Vector3} shadowDir - direction pointing towards the light\n     */\n  this.expandByGroundShadow = function () {\n\n    var _plane = new THREE.Plane();\n    var _ray = new THREE.Ray();\n    var _tmpCenter = new THREE.Vector3();\n    var _tmpVec = new THREE.Vector3();\n    var _tmpBox = new THREE.Box3();\n\n    return function (inoutBox, shadowDir) {\n\n      // y is up vector.\n      _plane.normal.set(0, 1, 0);\n      _plane.constant = -inoutBox.min.y;\n\n      // note that shadow is the direction pointing towards the light\n      _ray.direction.copy(shadowDir).negate().normalize();\n\n      // Don't add points if they would grow the box too much\n      var MaxBoxGrow = 100.0;\n      var center = inoutBox.center(_tmpCenter);\n      var maxDist2 = center.distanceToSquared(inoutBox.min) * MaxBoxGrow * MaxBoxGrow;\n\n      // For all box corners, add the corresponding ground shadow point.\n      _tmpBox.makeEmpty();\n      for (var i = 0; i < 8; i++) {\n        // shoot ray from box corner along the light dir\n        _ray.origin = getBoxCorner(inoutBox, i);\n\n        var onPlane = _ray.intersectPlane(_plane, _tmpVec);\n        if (!onPlane) {\n          continue;\n        }\n\n        // If the hit is too far away, we drop this point. This may happen if the light direction\n        // is close to horizontal. Growing the bbox too much would make the whole rendering fail\n        // (z-buffer artifacts or worse). So it's better to accept the clipped shadow in this case.\n        if (onPlane.distanceToSquared(center) >= maxDist2) {\n          continue;\n        }\n\n        // add point to bbox\n        _tmpBox.expandByPoint(onPlane);\n      }\n\n      // Finally, expand the original box with the shadow extent\n      inoutBox.union(_tmpBox);\n    };\n  }();\n\n  // used by debugging tools\n  this.getShadowParams = function () {return _shadowParams;};\n  this.getShadowCamera = function () {return _shadowCamera;};\n}\n\n// Provides functionality needed by FireFlyWebGLRenderer to work with shadow maps.\nexport var ShadowRender = function ShadowRender() {};\n\nShadowRender.RefreshUniformsShadow = function (uniforms, material) {\n\n  // may vary at runtime\n  if (uniforms.shadowMap)\n  uniforms.shadowMap.value = material.shadowMap;\n  if (uniforms.shadowMatrix)\n  uniforms.shadowMatrix.value = material.shadowMatrix;\n  if (uniforms.shadowLightDir)\n  uniforms.shadowLightDir.value = material.shadowLightDir;\n\n  // Currently constant\n  if (uniforms.shadowESMConstant)\n  uniforms.shadowESMConstant.value = ShadowConfig.ShadowESMConstant;\n  if (uniforms.shadowBias)\n  uniforms.shadowBias.value = ShadowConfig.ShadowBias;\n  if (uniforms.shadowMapSize)\n  uniforms.shadowMapSize.value = ShadowConfig.ShadowMapSize;\n  if (uniforms.shadowDarkness)\n  uniforms.shadowDarkness.value = ShadowConfig.ShadowDarkness;\n};","function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}import SheetRenderVert from './shaders/sheet_render_vert.glsl';\nimport SheetRenderFrag from './shaders/sheet_render_frag.glsl';\n\n// Used for pre-rendering the sheet into a different target, before placing it into the 3D scene.\nvar SheetRenderContext = /*#__PURE__*/function () {\n  function SheetRenderContext(viewerImpl, renderContext, glRenderer, materialManager) {_classCallCheck(this, SheetRenderContext);\n    this.viewerImpl = viewerImpl;\n    this.renderContext = renderContext;\n    this.glRenderer = glRenderer;\n\n    this.materialManager = materialManager;\n    this.materialName = '__material_2Don3D__';\n    this.tmpVec = new THREE.Vector3();\n  }_createClass(SheetRenderContext, [{ key: \"createContext\", value: function createContext()\n\n    {\n      this.sheetContext = new Autodesk.Viewing.Private.RenderContext();\n      this.sheetContext.init(this.glRenderer, this.renderContext.settings.logicalWidth, this.renderContext.settings.logicalHeight, { offscreen: true });\n\n      var config = this.renderContext.getConfig();\n      // Disable unneeded things. Set background color to transparent.\n      config.antialias = false;\n      config.renderEdges = false;\n      config.clearAlpha = 0;\n      if (config.clearColor) {\n        config.clearColor.set(1, 1, 1);\n      } else {\n        config.clearColorBottom.set(1, 1, 1);\n        config.clearColorTop.set(1, 1, 1);\n      }\n      this.sheetContext.applyConfig(config);\n    } }, { key: \"setSize\", value: function setSize()\n\n    {var context = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this.renderContext;\n      if (!this.sheetContext) {\n        return;\n      }\n\n      this.sheetContext.setSize(context.settings.logicalWidth, context.settings.logicalHeight);\n      this.updateMaterial();\n    }\n\n    // Creates a scene for the plane geometry to sit on\n  }, { key: \"createScene\", value: function createScene() {\n      this.setSize();\n\n      this.scene = new THREE.Scene();\n      // Create unit size mesh. The size will be set by setting the scale\n      this.planeGeometry = new THREE.PlaneBufferGeometry(1, 1);\n\n      this.material = new THREE.ShaderMaterial({\n        uniforms: {\n          sheetMap: { type: 't', value: this.sheetContext.getColorTarget() },\n          idMap: { type: 't', value: this.sheetContext.getIDTargets()[0] },\n          modelIDv2: { type: 'v3', value: new THREE.Vector3() },\n          resolution: { type: 'v2', value: new THREE.Vector2() },\n          alphaTest: { type: 'f', value: 0 } },\n\n        vertexShader: SheetRenderVert,\n        fragmentShader: SheetRenderFrag,\n        side: THREE.DoubleSide,\n        transparent: true });\n\n      this.material.supportsMrtNormals = true;\n\n      this.updateMaterial();\n\n      this.materialManager.addMaterialNonHDR(this.materialName, this.material);\n\n      this.mesh = new THREE.Mesh(this.planeGeometry, this.material);\n      this.mesh.matrixAutoUpdate = false;\n      this.scene.add(this.mesh);\n    } }, { key: \"updateMaterial\", value: function updateMaterial()\n\n    {\n      if (this.material) {\n        var target = this.sheetContext.getColorTarget();\n        // Update because in resize the targets will be recreated\n        this.material.uniforms.sheetMap.value = target;\n        this.material.uniforms.idMap.value = this.sheetContext.getIDTargets()[0];\n        this.material.uniforms.resolution.value.set(1 / (target.width || 1), 1 / (target.height || 1));\n      }\n    } }, { key: \"beginScene\", value: function beginScene(\n\n    scene, camera, lights) {\n      if (!this.sheetContext) {\n        this.createContext();\n      }\n\n      this.sheetContext.beginScene(scene, camera, lights, true);\n    }\n\n    // The sheet is rendered onto a separate buffer, without depth testing. This buffer is then used as a texture\n    // which is projected onto a plane, that matches the pose and size of the original plane. This way, we can have\n    // depth testing for the sheet so it blends correctly with the 3D model, while avoiding artifacts created by\n    // rendering the sheet regularly with depth testing on\n    // Optional context is e.g. for printing where the context is different\n  }, { key: \"renderScenePart\", value: function renderScenePart(originalScene, wantColor, wantSAO, wantID) {var _model$loader, _model$loader$options;var context = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : this.renderContext;\n      if (!originalScene.frags || !originalScene.frags.is2d) {\n        return;\n      }\n\n      if (!this.scene) {\n        this.createScene();\n      }\n\n      // For first pass, discard any pixels that have opacity <= 0.9, i.e. draw only opaque ones\n      // For second (or if has only one pass), discard only pixels with opacity 0\n      this.material.uniforms.alphaTest.value = !originalScene.needsTwoPasses || originalScene.isSecondPass ? 0 : 0.9;\n\n      var modelId = originalScene.modelId;\n      var model = this.viewerImpl.modelQueue().findModel(modelId);\n      var bounds = model.getBoundingBox(true);\n      var modelTransform = originalScene.frags.matrix;\n      var placementTransform = (_model$loader = model.loader) === null || _model$loader === void 0 ? void 0 : (_model$loader$options = _model$loader.options) === null || _model$loader$options === void 0 ? void 0 : _model$loader$options.placementTransform;\n      // Encode model id into vector\n      this.material.uniforms.modelIDv2.value.set((modelId & 0xFF) / 255,\n      (modelId >> 8 & 0xFF) / 255,\n      (modelId >> 16 & 0xFF) / 255);\n\n      // If AO has changed, the post pipeline needs to be reinit\n      if (context.getAOEnabled() !== this.sheetContext.getAOEnabled()) {\n        this.sheetContext.initPostPipeline(context.getAOEnabled(), false);\n      }\n      wantID = wantID && model.areAllVisible();\n      // Render original scene to separate buffer\n      // In case of rendering two passes, this stage will be the same for both, so we can skip it for\n      // a performance improvement\n      var skipIntermediateTarget = this.lastRenderedModel === model && originalScene.isSecondPass;\n      if (!skipIntermediateTarget) {\n        this.sheetContext.renderScenePart(originalScene, wantColor, wantSAO, wantID, false);\n        this.sheetContext.presentBuffer();\n      }\n\n\n      // Update mesh with this scene's model's bounds\n      // First set original bounds and location\n      // Then apply transform\n      var size = bounds.size();\n      this.mesh.matrix.makeScale(size.x, size.y, 1.0);\n      bounds.center(this.tmpVec);\n      this.mesh.matrix.setPosition(this.tmpVec);\n      if (placementTransform) {\n        this.mesh.matrix.multiplyMatrices(placementTransform, this.mesh.matrix);\n      }\n      if (modelTransform) {\n        this.mesh.matrix.multiplyMatrices(modelTransform, this.mesh.matrix);\n      }\n      this.mesh.matrixWorld.copy(this.mesh.matrix);\n      // Now render mesh with projected texture\n      this.scene.modelId = modelId;\n      context.renderScenePart(this.scene, wantColor, wantSAO, wantID);\n\n      this.lastRenderedModel = model;\n    } }, { key: \"destroy\", value: function destroy()\n\n    {\n      if (this.material) {\n        this.material.dispose();\n        this.material = null;\n      }\n\n      if (this.planeGeometry) {\n        this.planeGeometry.dispose();\n        this.planeGeometry = null;\n      }\n\n      if (this.sheetContext) {\n        this.sheetContext.cleanup();\n        this.context = null;\n      }\n\n      this.renderContext = null;\n      this.glRenderer = null;\n\n    } }]);return SheetRenderContext;}();export { SheetRenderContext as default };","import { WebGLShader } from './WebGLShader';\nimport { resolve } from './ShaderChunks';\nimport * as THREE from \"three\";\nimport { isIE11 } from \"../../compat\";\n\nvar prefix_webgl2_vertex = \"#version 300 es\\n    #define _LMVWEBGL2_\\n    #define texture2D texture\\n    #define textureCube texture\\n    #define attribute in\\n    #define varying out\\n\";\n\n\n\n\n\n\n\nvar prefix_webgl1_vertex = \"\";\n\n\nvar prefix_webgl2_fragment = \"#version 300 es\\n    #define _LMVWEBGL2_\\n    #define texture2D texture\\n    #define textureCube texture\\n    #define textureCubeLodEXT textureLod\\n    #define gl_FragColor outFragColor\\n    #define varying in\\n\";\n\n\n\n\n\n\n\n\nvar prefix_webgl1_fragment = \"\\n    #define gl_FragDepth gl_FragDepthEXT\\n    #extension GL_OES_standard_derivatives : enable\\n\";\n\n\n\n\nexport var PrismMaps = [\n\"opaque_luminance_modifier\",\n\"surface_albedo\",\n\"surface_roughness\",\n\"surface_anisotropy\",\n\"surface_rotation\",\n\"opaque_f0\",\n\"opaque_albedo\",\n\"metal_f0\",\n\"layered_f0\",\n\"layered_diffuse\",\n\"layered_roughness\",\n\"layered_anisotropy\",\n\"layered_rotation\",\n\"layered_bottom_f0\",\n\"layered_fraction\",\n\"surface_cutout\",\n\"glazing_transmission_color\",\n\"glazing_f0\",\n\"glazing_transmission_roughness\",\n\"wood_curly_distortion\"];\n\n\n// We test if the UVs are in the bounds when clamping; if not, discard!\n// This is done here because we have access to the clamp parameters. The macro #defined\n// by this method can then be used elsewhere, e.g. GetPrismMapSampleChunk, without knowledge of these parameters.\n// Here is a typical result returned when clamping is on and \"opaque_albedo\" is passed in for the name:\n// #define OPAQUE_ALBEDO_CLAMP_TEST if (uv_opaque_albedo_map.x < 0.0 || uv_opaque_albedo_map.x > 1.0 || uv_opaque_albedo_map.y < 0.0 || uv_opaque_albedo_map.y > 1.0) { discard; }\nexport var GetPrismMapChunk = function GetPrismMapChunk(name, clampS, clampT) {\n  var uv = \"uv_\" + name + \"_map\";\n  var conditionChunk = \"\";\n  if (clampS && clampT)\n  conditionChunk = \"if (\" + uv + \".x < 0.0 || \" + uv + \".x > 1.0 || \" + uv + \".y < 0.0 || \" + uv + \".y > 1.0) { discard; }\";else\n  if (clampS)\n  conditionChunk = \"if (\" + uv + \".x < 0.0 || \" + uv + \".x > 1.0) { discard; }\";else\n  if (clampT)\n  conditionChunk = \"if (\" + uv + \".y < 0.0 || \" + uv + \".y > 1.0) { discard; }\";\n  return \"#define \" + name.toUpperCase() + \"_CLAMP_TEST \" + conditionChunk;\n};\n\n//Based on THREE.WebGLProgram, with some defines added / removed.\nexport var WebGLProgram = function () {\n  'use strict';\n\n  var programIdCount = 0;\n\n  var filterEmptyLine = function filterEmptyLine(string) {\n\n    return string !== '';\n\n  };\n\n  var generateDefines = function generateDefines(defines) {\n\n    var value,chunk,chunks = [];\n\n    for (var d in defines) {\n\n      value = defines[d];\n      if (value === false) continue;\n\n      chunk = \"#define \" + d + \" \" + value;\n      chunks.push(chunk);\n\n    }\n\n    return chunks.join(\"\\n\");\n\n  };\n\n  var cacheUniformLocations = function cacheUniformLocations(gl, program, identifiers) {\n\n    var uniforms = {};\n\n    for (var i = 0, l = identifiers.length; i < l; i++) {\n\n      var id = identifiers[i];\n      uniforms[id] = gl.getUniformLocation(program, id);\n\n    }\n\n    return uniforms;\n\n  };\n\n  var cacheAttributeLocations = function cacheAttributeLocations(gl, program, identifiers) {\n\n    var attributes = {};\n\n    for (var i = 0, l = identifiers.length; i < l; i++) {\n\n      var id = identifiers[i];\n      attributes[id] = gl.getAttribLocation(program, id);\n\n    }\n\n    return attributes;\n\n  };\n\n  // Add clamping and inversion code for the simple Phong material perform any operations needed.\n  // This is done here because we have access to the clamp and inversion parameters. The macro #defined\n  // by this method can then be used elsewhere without knowledge of these parameters.\n  var getMapChunk = function getMapChunk(name, clampS, clampT, invert, emptyChunk) {\n    var invertChunk = invert ? \"1.0-\" : \"\";\n    var readChunk = \"texture2D(\" + name + \", (UV))\";\n    var conditionChunk = \"\";\n    emptyChunk = emptyChunk || \"vec4(0.0)\";\n    if (clampS && clampT)\n    conditionChunk = \"((UV).x < 0.0 || (UV).x > 1.0 || (UV).y < 0.0 || (UV).y > 1.0) ? \" + emptyChunk + \" : \";else\n    if (clampS)\n    conditionChunk = \"((UV).x < 0.0 || (UV).x > 1.0) ? \" + emptyChunk + \" : \";else\n    if (clampT)\n    conditionChunk = \"((UV).y < 0.0 || (UV).y > 1.0) ? \" + emptyChunk + \" : \";\n    return \"#define GET_\" + name.toUpperCase() + \"(UV) (\" + conditionChunk + invertChunk + readChunk + \")\";\n  };\n\n  var getPrismMapsChunk = function getPrismMapsChunk(parameters) {\n\n    var result = \"\\n\";\n\n    for (var i = 0; i < PrismMaps.length; i++) {\n      var val = parameters[PrismMaps[i]];\n      if (val)\n      result += GetPrismMapChunk(PrismMaps[i], val.S, val.T) + \"\\n\";\n    }\n\n    return result;\n  };\n\n  return function (renderer, code, material, parameters) {\n\n    var _this = renderer;\n    var _gl = _this.context;\n    var _isWebGL2 = _this.isWebGL2();\n\n    var defines = material.defines;\n    var uniforms = material.__webglShader.uniforms;\n    var attributes = material.attributes;\n\n    var vertexShader = resolve(material.__webglShader.vertexShader);\n    var fragmentShader = resolve(material.__webglShader.fragmentShader);\n\n    var index0AttributeName = material.index0AttributeName;\n\n    if (index0AttributeName === undefined && parameters.morphTargets === true) {\n\n      // programs with morphTargets displace position out of attribute 0\n\n      index0AttributeName = 'position';\n\n    }\n\n    var envMapTypeDefine = 'ENVMAP_TYPE_CUBE';\n    var envMapModeDefine = 'ENVMAP_MODE_REFLECTION';\n    var envMapBlendingDefine = 'ENVMAP_BLENDING_MULTIPLY';\n\n    if (parameters.envMap) {\n      //This will make more sense when we update three.js to R70\n      //Currently we don't need any of it anyway, because we only\n      //reflect and use cube maps.\n      /*\n                  switch ( material.envMap.mapping ) {\n      \n                      case THREE.CubeReflectionMapping:\n                      case THREE.CubeRefractionMapping:\n                          envMapTypeDefine = 'ENVMAP_TYPE_CUBE';\n                          break;\n      \n                      case THREE.EquirectangularReflectionMapping:\n                      case THREE.EquirectangularRefractionMapping:\n                          envMapTypeDefine = 'ENVMAP_TYPE_EQUIREC';\n                          break;\n      \n                      case THREE.SphericalReflectionMapping:\n                          envMapTypeDefine = 'ENVMAP_TYPE_SPHERE';\n                          break;\n      \n                  }\n      \n                  switch ( material.envMap.mapping ) {\n      \n                      case THREE.CubeRefractionMapping:\n                      case THREE.EquirectangularRefractionMapping:\n                          envMapModeDefine = 'ENVMAP_MODE_REFRACTION';\n                          break;\n      \n                  }\n      \n      \n                  switch ( material.combine ) {\n      \n                      case THREE.MultiplyOperation:\n                          envMapBlendingDefine = 'ENVMAP_BLENDING_MULTIPLY';\n                          break;\n      \n                      case THREE.MixOperation:\n                          envMapBlendingDefine = 'ENVMAP_BLENDING_MIX';\n                          break;\n      \n                      case THREE.AddOperation:\n                          envMapBlendingDefine = 'ENVMAP_BLENDING_ADD';\n                          break;\n      \n                  }\n      */\n    }\n\n    var gammaFactorDefine = renderer.gammaFactor > 0 ? renderer.gammaFactor : 1.0;\n\n    // THREE.log( \"building new program \" );\n\n    //\n\n    var customDefines = generateDefines(defines);\n\n    //\n\n    var program = _gl.createProgram();\n\n    var prefix_vertex, prefix_fragment;\n\n    if (material instanceof THREE.RawShaderMaterial) {\n\n      prefix_vertex = [\n\n      _isWebGL2 ? prefix_webgl2_vertex : prefix_webgl1_vertex,\n\n      customDefines].\n\n      filter(filterEmptyLine).join('\\n');\n\n      if (prefix_vertex.length > 0) {\n\n        prefix_vertex += '\\n';\n\n      }\n\n      prefix_fragment = [\n\n      _isWebGL2 ? prefix_webgl2_fragment : prefix_webgl1_fragment,\n\n      \"precision \" + parameters.precisionFragment + \" float;\",\n\n      customDefines,\n\n      _isWebGL2 ? \"out vec4 outFragColor;\" : \"\"].\n\n      filter(filterEmptyLine).join('\\n');\n\n      if (prefix_fragment.length > 0) {\n\n        prefix_fragment += '\\n';\n\n      }\n\n    } else {\n\n      prefix_vertex = [\n\n      _isWebGL2 ? prefix_webgl2_vertex : prefix_webgl1_vertex,\n\n      \"precision \" + parameters.precision + \" float;\",\n      \"precision \" + parameters.precision + \" int;\",\n\n      customDefines,\n\n      parameters.vertexPrefix,\n\n      parameters.supportsVertexTextures ? \"#define VERTEX_TEXTURES\" : \"\",\n\n      _this.gammaInput ? \"#define GAMMA_INPUT\" : \"\",\n      _this.gammaOutput ? \"#define GAMMA_OUTPUT\" : \"\",\n      '#define GAMMA_FACTOR ' + gammaFactorDefine,\n\n      parameters.mrtNormals ? \"#define MRT_NORMALS\" : \"\", //FY\n      parameters.mrtIdBuffer ? \"#define MRT_ID_BUFFER\" : \"\", //FY\n\n      \"#define MAX_DIR_LIGHTS \" + parameters.maxDirLights,\n      \"#define MAX_POINT_LIGHTS \" + parameters.maxPointLights,\n      \"#define MAX_SPOT_LIGHTS \" + parameters.maxSpotLights,\n      \"#define MAX_HEMI_LIGHTS \" + parameters.maxHemiLights,\n\n      \"#define MAX_BONES \" + parameters.maxBones,\n\n      \"#define NUM_CUTPLANES \" + parameters.numCutplanes,\n      parameters.loadingAnimationDuration > 0 ? \"#define LOADING_ANIMATION\" : \"\",\n\n      parameters.map ? \"#define USE_MAP\" : \"\",\n      parameters.envMap ? \"#define USE_ENVMAP\" : \"\",\n      parameters.envMap ? '#define ' + envMapModeDefine : '',\n      parameters.irradianceMap ? \"#define USE_IRRADIANCEMAP\" : \"\", //FY\n      parameters.lightMap ? \"#define USE_LIGHTMAP\" : \"\",\n      parameters.bumpMap ? \"#define USE_BUMPMAP\" : \"\",\n      parameters.normalMap ? \"#define USE_NORMALMAP\" : \"\",\n      parameters.specularMap ? \"#define USE_SPECULARMAP\" : \"\",\n      parameters.alphaMap ? \"#define USE_ALPHAMAP\" : \"\",\n      parameters.vertexColors ? \"#define USE_COLOR\" : \"\",\n      parameters.vertexIds ? \"#define USE_VERTEX_ID\" : \"\",\n\n      parameters.useTiling ? \"#define USE_TILING\" : \"\",\n\n      parameters.useInstancing ? \"#define USE_INSTANCING\" : \"\",\n\n      parameters.wideLines ? \"#define WIDE_LINES\" : \"\",\n\n      parameters.skinning ? \"#define USE_SKINNING\" : \"\",\n      parameters.useVertexTexture ? \"#define BONE_TEXTURE\" : \"\",\n\n      parameters.morphTargets ? \"#define USE_MORPHTARGETS\" : \"\",\n      parameters.morphNormals ? \"#define USE_MORPHNORMALS\" : \"\",\n      parameters.wrapAround ? \"#define WRAP_AROUND\" : \"\",\n      parameters.doubleSided ? \"#define DOUBLE_SIDED\" : \"\",\n      parameters.flipSided ? \"#define FLIP_SIDED\" : \"\",\n\n      parameters.sizeAttenuation ? \"#define USE_SIZEATTENUATION\" : \"\",\n\n      parameters.packedNormals ? \"#define UNPACK_NORMALS\" : \"\",\n\n      // \"#define FLAT_SHADED\",  // TODO_NOP: hook up to param\n\n      \"uniform mat4 modelMatrix;\",\n      \"uniform mat4 modelViewMatrix;\",\n      \"uniform mat4 projectionMatrix;\",\n      \"uniform mat4 viewMatrix;\",\n      \"uniform mat3 normalMatrix;\",\n      \"uniform vec3 cameraPosition;\",\n\n      \"attribute vec3 position;\",\n\n      \"#ifdef UNPACK_NORMALS\",\n      \"attribute vec2 normal;\",\n      \"#else\",\n      \"attribute vec3 normal;\",\n      \"#endif\",\n\n      \"attribute vec2 uv;\",\n      \"attribute vec2 uv2;\",\n\n      \"#ifdef PRISMWOOD\",\n      \"attribute vec3 uvw;\",\n      \"#endif\",\n\n      \"#ifdef USE_COLOR\",\n\n      \"   attribute vec3 color;\",\n\n      \"#endif\",\n\n      \"\"].\n\n      join('\\n');\n\n      prefix_fragment = [\n\n      _isWebGL2 ? prefix_webgl2_fragment : prefix_webgl1_fragment,\n\n      !_isWebGL2 && (parameters.bumpMap || parameters.normalMap) ? \"#extension GL_OES_standard_derivatives : enable\" : \"\",\n      !_isWebGL2 && (parameters.mrtIdBuffer || parameters.mrtNormals) && !isIE11 ? \"#extension GL_EXT_draw_buffers : enable\" : \"\",\n\n      !_isWebGL2 && parameters.mrtIdBuffer ? \"#define gl_FragColor gl_FragData[0]\" : \"\",\n\n      parameters.haveTextureLod ? \"#define HAVE_TEXTURE_LOD\" : \"\",\n\n      customDefines,\n\n      parameters.fragmentPrefix,\n\n      \"#define MAX_DIR_LIGHTS \" + parameters.maxDirLights,\n      \"#define MAX_POINT_LIGHTS \" + parameters.maxPointLights,\n      \"#define MAX_SPOT_LIGHTS \" + parameters.maxSpotLights,\n      \"#define MAX_HEMI_LIGHTS \" + parameters.maxHemiLights,\n\n      \"#define NUM_CUTPLANES \" + parameters.numCutplanes,\n      parameters.loadingAnimationDuration > 0 ? \"#define LOADING_ANIMATION\" : \"\",\n\n      parameters.alphaTest ? \"#define ALPHATEST \" + parameters.alphaTest : \"\",\n\n      _this.gammaInput ? \"#define GAMMA_INPUT\" : \"\",\n      _this.gammaOutput ? \"#define GAMMA_OUTPUT\" : \"\",\n      '#define GAMMA_FACTOR ' + gammaFactorDefine,\n\n      parameters.mrtNormals ? \"#define MRT_NORMALS\" : \"\", //FY\n      parameters.mrtIdBuffer ? \"#define MRT_ID_BUFFER\" : \"\", //FY\n      parameters.mrtIdBuffer > 1 ? \"#define MODEL_COLOR\" : \"\",\n\n      '#define TONEMAP_OUTPUT ' + (parameters.tonemapOutput || 0),\n\n      parameters.useFog && parameters.fog ? \"#define USE_FOG\" : \"\",\n      parameters.useFog && parameters.fogExp ? \"#define FOG_EXP2\" : \"\",\n\n      parameters.map ? \"#define USE_MAP\" : \"\",\n      parameters.envMap ? \"#define USE_ENVMAP\" : \"\",\n      parameters.envMap ? '#define ' + envMapTypeDefine : '',\n      parameters.envMap ? '#define ' + envMapModeDefine : '',\n      parameters.envMap ? '#define ' + envMapBlendingDefine : '',\n      parameters.irradianceMap ? \"#define USE_IRRADIANCEMAP\" : \"\", //FY\n      parameters.envGammaEncoded ? \"#define ENV_GAMMA\" : \"\", //FY\n      parameters.irrGammaEncoded ? \"#define IRR_GAMMA\" : \"\", //FY\n      parameters.envRGBM ? \"#define ENV_RGBM\" : \"\", //FY\n      parameters.irrRGBM ? \"#define IRR_RGBM\" : \"\", //FY\n      parameters.lightMap ? \"#define USE_LIGHTMAP\" : \"\",\n      parameters.bumpMap ? \"#define USE_BUMPMAP\" : \"\",\n      parameters.normalMap ? \"#define USE_NORMALMAP\" : \"\",\n      parameters.specularMap ? \"#define USE_SPECULARMAP\" : \"\",\n      parameters.alphaMap ? \"#define USE_ALPHAMAP\" : \"\",\n      parameters.vertexColors ? \"#define USE_COLOR\" : \"\",\n      parameters.vertexIds ? \"#define USE_VERTEX_ID\" : \"\",\n\n      parameters.metal ? \"#define METAL\" : \"\",\n      parameters.clearcoat ? \"#define CLEARCOAT\" : \"\",\n      parameters.wrapAround ? \"#define WRAP_AROUND\" : \"\",\n      parameters.doubleSided ? \"#define DOUBLE_SIDED\" : \"\",\n      parameters.flipSided ? \"#define FLIP_SIDED\" : \"\",\n\n      parameters.hatchPattern ? \"#define HATCH_PATTERN\" : \"\",\n\n      parameters.mapInvert ? \"#define MAP_INVERT\" : \"\",\n      parameters.useTiling ? \"#define USE_TILING\" : \"\",\n      parameters.useTiling ? \"#define TILE_RANGE_X_MIN \" + parameters.tilingRepeatRange[0] : \"\",\n      parameters.useTiling ? \"#define TILE_RANGE_Y_MIN \" + parameters.tilingRepeatRange[1] : \"\",\n      parameters.useTiling ? \"#define TILE_RANGE_X_MAX \" + parameters.tilingRepeatRange[2] : \"\",\n      parameters.useTiling ? \"#define TILE_RANGE_Y_MAX \" + parameters.tilingRepeatRange[3] : \"\",\n      parameters.hasRoundCorner ? \"#define USE_TILING_NORMAL\" : \"\",\n      parameters.useRandomOffset ? \"#define USE_TILING_RANDOM\" : \"\",\n      getMapChunk(\"map\", parameters.mapClampS, parameters.mapClampT),\n      getMapChunk(\"bumpMap\", parameters.bumpMapClampS, parameters.bumpMapClampT),\n      getMapChunk(\"normalMap\", parameters.normalMapClampS, parameters.normalMapClampT),\n      getMapChunk(\"specularMap\", parameters.specularMapClampS, parameters.specularMapClampT),\n      getMapChunk(\"alphaMap\", parameters.alphaMapClampS, parameters.alphaMapClampT, parameters.alphaMapInvert),\n\n      // \"#define FLAT_SHADED\",  // TODO_NOP: hook up to param\n\n      \"#ifdef USE_ENVMAP\",\n      \"#ifdef HAVE_TEXTURE_LOD\",\n      !_isWebGL2 ? \"#extension GL_EXT_shader_texture_lod : enable\" : \"\",\n      \"#endif\",\n      '#endif',\n\n      \"precision \" + parameters.precisionFragment + \" float;\",\n      \"precision \" + parameters.precisionFragment + \" int;\",\n\n      _isWebGL2 ? \"layout(location = 0) out vec4 outFragColor;\" : \"\",\n\n\n      \"uniform highp mat4 viewMatrix;\",\n      \"uniform highp mat4 projectionMatrix;\",\n      \"uniform highp vec3 cameraPosition;\",\n\n      \"#if defined(USE_ENVMAP) || defined(USE_IRRADIANCEMAP)\",\n\n      \"uniform mat4 viewMatrixInverse;\",\n\n      \"#endif\",\n\n      \"\"].\n      join('\\n');\n\n      // now get map chunks for PRISM material\n      // mapPrismOpaqueLuminanceModifierClampS etc. are set in WebGLRenderer.js in the parameters\n      if (parameters.isPrism)\n      prefix_fragment += getPrismMapsChunk(parameters);\n\n    }\n\n    var glVertexShader = new WebGLShader(_gl, _gl.VERTEX_SHADER, prefix_vertex + vertexShader);\n    var glFragmentShader = new WebGLShader(_gl, _gl.FRAGMENT_SHADER, prefix_fragment + fragmentShader);\n\n    _gl.attachShader(program, glVertexShader);\n    _gl.attachShader(program, glFragmentShader);\n\n    if (index0AttributeName !== undefined) {\n\n      // Force a particular attribute to index 0.\n      // because potentially expensive emulation is done by browser if attribute 0 is disabled.\n      // And, color, for example is often automatically bound to index 0 so disabling it\n\n      _gl.bindAttribLocation(program, 0, index0AttributeName);\n\n    }\n\n    _gl.linkProgram(program);\n\n    if (typeof DEBUG_SHADERS !== \"undefined\" && DEBUG_SHADERS) {\n\n      if (_gl.getProgramParameter(program, _gl.LINK_STATUS) === false) {\n\n        THREE.error('THREE.WebGLProgram: Could not initialise shader.');\n        THREE.error('gl.VALIDATE_STATUS', _gl.getProgramParameter(program, _gl.VALIDATE_STATUS));\n        THREE.error('gl.getError()', _gl.getError());\n\n      }\n\n      if (_gl.getProgramInfoLog(program) !== '') {\n\n        THREE.warn('THREE.WebGLProgram: gl.getProgramInfoLog()', _gl.getProgramInfoLog(program));\n\n      }\n\n    }\n\n    // clean up\n\n    _gl.deleteShader(glVertexShader);\n    _gl.deleteShader(glFragmentShader);\n\n    // cache uniform locations\n\n    var identifiers = [\n\n    'viewMatrix', 'modelViewMatrix', 'projectionMatrix', 'normalMatrix', 'modelMatrix', 'cameraPosition',\n    'viewMatrixInverse', 'mvpMatrix', 'dbId' //FY\n    ];\n\n\n    for (var u in uniforms) {\n\n      identifiers.push(u);\n\n    }\n\n    this.uniforms = cacheUniformLocations(_gl, program, identifiers);\n\n    // cache attributes locations\n\n    identifiers = [\n\n    \"position\", \"normal\", \"uv\", \"uv2\", \"tangent\", \"color\",\n    \"lineDistance\", \"uvw\", \"id\",\n    \"instOffset\", \"instScaling\", \"instRotation\", // instancing\n    \"prev\", \"next\", \"side\", // attributes for wide lines\n    \"uvp\", \"flagp\" // point sprite\n    ];\n\n    for (var a in attributes) {\n\n      identifiers.push(a);\n\n    }\n\n    this.attributes = cacheAttributeLocations(_gl, program, identifiers);\n    this.attributesKeys = Object.keys(this.attributes);\n\n    //\n\n    this.id = programIdCount++;\n    this.code = code;\n    this.usedTimes = 1;\n    this.program = program;\n    this.vertexShader = glVertexShader;\n    this.fragmentShader = glFragmentShader;\n\n    return this;\n\n  };\n\n}();","import { PrismMaps, WebGLProgram } from './WebGLProgram';\nimport * as shadowmap from './ShadowMap';\nimport { RenderBatch } from '../scene/RenderBatch';\nimport { isIE11, getGlobal } from \"../../compat\";\nimport * as THREE from \"three\";\nimport { USE_VAO } from \"../globals\";\n\nexport var DEBUG_TEXTURE_LOAD = false;\n\nvar _window = getGlobal();\nvar _document = _window.document;\n\n\n/**\n                                   * @author supereggbert / http://www.paulbrunt.co.uk/\n                                   * @author mrdoob / http://mrdoob.com/\n                                   * @author alteredq / http://alteredqualia.com/\n                                   * @author szimek / https://github.com/szimek/\n                                   * @author stanevt -- Modified for Autodesk LMV web viewer\n                                   * @constructor\n                                   */\nexport var WebGLRenderer = function WebGLRenderer(parameters) {\n  THREE.log('THREE.WebGLRenderer', THREE.REVISION);\n\n  parameters = parameters || {};\n\n  var _canvas = parameters.canvas !== undefined ? parameters.canvas : _document.createElement('canvas'),\n\n  _pixelRatio = null, // For storing user selected pixelRatio\n\n  _precisionVertex = parameters.precision !== undefined ? parameters.precision : 'highp',\n  _precisionFragment = _precisionVertex,\n\n  _alpha = parameters.alpha !== undefined ? parameters.alpha : false,\n  _premultipliedAlpha = parameters.premultipliedAlpha !== undefined ? parameters.premultipliedAlpha : true,\n  _antialias = parameters.antialias !== undefined ? parameters.antialias : false,\n  _stencil = parameters.stencil !== undefined ? parameters.stencil : true,\n  _preserveDrawingBuffer = parameters.preserveDrawingBuffer !== undefined ? parameters.preserveDrawingBuffer : true, //change it to true for the screen capture api\n\n  _clearColor = new THREE.Color(0x000000),\n  _clearAlpha = 0;\n\n  // Firefox on Mac OSX reports it can do MRT, but it actually does not work in our case,\n  // so we have to detect this case manually.\n  var _blockMRT = _window.navigator.userAgent.indexOf(\"Firefox\") !== -1 &&\n  _window.navigator.userAgent.indexOf(\"Mac OS\") !== -1;\n\n  // block MRT for IE11 as well. This fixes a crash in Edge on surface pro - which caused sheets to not display.\n  // Note that for IE11, GL_EXT_draw_buffers is disabled in WebGLProgram anyway. MRT might actually work on edge\n  // (for which isIE11 is true too) in some cases, but someone would need to test that.\n  _blockMRT = _blockMRT || isIE11;\n\n  var lights = [];\n  var _webglObjects = {};\n  var _webglObjectsImmediate = [];\n  var _objectModelViewMatrix = new THREE.Matrix4();\n  var _objectNormalMatrix = new THREE.Matrix3();\n  var _highResTimeStamp = 0;\n\n  var opaqueObjects = [];\n  var transparentObjects = [];\n\n  var _loadingAnimationDuration = -1;\n\n  // public properties\n\n  this.domElement = _canvas;\n  this.context = null;\n  this.refCount = 0;\n\n  // clearing\n\n  this.autoClear = true;\n  this.autoClearColor = true;\n  this.autoClearDepth = true;\n  this.autoClearStencil = true;\n\n  // scene graph\n\n  this.sortObjects = true;\n\n  // physically based shading\n\n  this.gammaInput = false;\n  this.gammaOutput = false;\n\n  // morphs\n\n  this.maxMorphTargets = 8;\n  this.maxMorphNormals = 4;\n\n  // flags\n\n  this.autoScaleCubemaps = true;\n\n  // info\n\n  this.info = {\n\n    memory: {\n\n      programs: 0,\n      geometries: 0,\n      textures: 0 },\n\n\n\n    render: {\n\n      calls: 0,\n      vertices: 0,\n      faces: 0,\n      points: 0 } };\n\n\n\n\n\n  // internal properties\n\n  var _this = this,\n\n  _programs = [],\n\n  // internal state cache\n\n  _currentProgram = null,\n  _currentFramebuffer = null,\n  _currentMaterialId = -1,\n  _currentCamera = null,\n\n  _currentGeometryProgram = '',\n  _programIndex = 0,\n  _vertexPrefix = \"\",\n  _fragmentPrefix = \"\",\n\n  _usedTextureUnits = 0,\n\n  // GL state cache\n\n  _viewportX = 0,\n  _viewportY = 0,\n  _viewportWidth = _canvas.width,\n  _viewportHeight = _canvas.height,\n  //_currentWidth = 0,\n  //_currentHeight = 0,\n\n  _dynamicBuffers = {}, //gl buffers used for streaming draw\n\n  // frustum\n\n  _frustum = new THREE.Frustum(),\n\n  // camera matrices cache\n\n  _projScreenMatrix = new THREE.Matrix4(),\n  _viewInverseEnv = new THREE.Matrix4(),\n\n  _vector3 = new THREE.Vector3(),\n\n  // light arrays cache\n\n  _direction = new THREE.Vector3(),\n\n  _lightsNeedUpdate = true,\n\n  _lights = {\n\n    ambient: [0, 0, 0],\n    directional: { length: 0, colors: [], positions: [] },\n    point: { length: 0, colors: [], positions: [], distances: [] },\n    spot: { length: 0, colors: [], positions: [], distances: [], directions: [], anglesCos: [], exponents: [] },\n    hemi: { length: 0, skyColors: [], groundColors: [], positions: [] } };\n\n\n\n  // initialize\n\n  var _gl;\n  var _isWebGL2;\n\n  var _glExtensionDrawBuffers;\n  var _glExtensionInstancedArrays;\n  var _glExtensionVAO;\n\n  try {\n\n    var attributes = {\n      alpha: _alpha,\n      premultipliedAlpha: _premultipliedAlpha,\n      antialias: _antialias,\n      stencil: _stencil,\n      preserveDrawingBuffer: _preserveDrawingBuffer };\n\n\n    _gl = parameters.useWebGL2 !== false ? _canvas.getContext('webgl2', attributes) : null;\n\n    if (_gl) {\n\n      _isWebGL2 = true;\n\n    } else {\n\n      _gl = _canvas.getContext('webgl', attributes) || _canvas.getContext('experimental-webgl', attributes);\n\n    }\n\n    if (_gl === null) {\n\n      if (_canvas.getContext('webgl') !== null) {\n\n        throw 'Error creating WebGL context with your selected attributes.';\n\n      } else {\n\n        throw 'Error creating WebGL context.';\n\n      }\n\n    }\n\n    /* You can substitute your own error catcher for WebGL, by adding a script.\n       * This can be particularly handy for putting a break when a particular error is encountered,\n       * so you can see exactly what line is causing the problem. You can also catch errors where\n       * we pass in \"undefined\" as an argument, which is something that is rarely a good idea.\n       *\n       * You need to include in index.html:\n       *     <script src=\"thirdparty/khronos/webgl-debug.js\"></script>\"\n       * in order to use this functionality. Then just uncomment the rest, and choose\n       * which of the makeDebugContext lines at the end to uncomment.\n       */\n    /*\n          // A standard one. Chrome already reports such errors without you adding this, and yourw\n          // will take the place of theirs.\n          function throwOnGLError(err, funcName, args) {\n              throw WebGLDebugUtils.glEnumToString(err) + \" was caused by call to: \" + funcName;\n          };\n           // this one is terribly weird, but provided by Khronos as an example.\n          function logGLCall(functionName, args) {\n               console.log(\"gl.\" + functionName + \"(\" +\n                  WebGLDebugUtils.glFunctionArgsToString(functionName, args) + \")\");\n          }\n           // this one is actually handy: flags an error when we try to pass in an argument that is undefined.\n          function validateNoneOfTheArgsAreUndefined(functionName, args) {\n              for (var ii = 0; ii < args.length; ++ii) {\n                if (args[ii] === undefined) {\n                  console.error(\"undefined passed to gl.\" + functionName + \"(\" +\n                                WebGLDebugUtils.glFunctionArgsToString(functionName, args) + \")\");\n                }\n              }\n          }\n           // Choose one of these two:\n          // the default, shows usual errors.\n          _gl = WebGLDebugUtils.makeDebugContext(_gl, throwOnGLError);\n          // to check for undefined args passed in to WebGL, which is a no-no:\n          //_gl = WebGLDebugUtils.makeDebugContext(_gl, undefined, validateNoneOfTheArgsAreUndefined);\n          */\n\n\n\n\n\n    //LMV-1914: lower fragment precision for low-end mobile devices (Android)\n    var highp = _gl.getShaderPrecisionFormat(_gl.FRAGMENT_SHADER, _gl.HIGH_FLOAT);\n    if (highp.precision == 0) _precisionFragment = 'mediump';\n\n    _canvas.addEventListener('webglcontextlost', function (event) {\n\n      event.preventDefault();\n\n      resetGLState();\n      setDefaultGLState();\n\n      _webglObjects = {};\n\n      _this.webglcontextlost && _this.webglcontextlost(event);\n\n    }, false);\n\n  } catch (error) {\n\n    THREE.error(error);\n    return;\n\n  }\n\n  var state = new THREE.WebGLState(_gl, paramThreeToGL);\n\n  if (_gl.getShaderPrecisionFormat === undefined) {\n\n    _gl.getShaderPrecisionFormat = function () {\n\n      return {\n        \"rangeMin\": 1,\n        \"rangeMax\": 1,\n        \"precision\": 1 };\n\n\n    };\n  }\n\n  var extensions = new THREE.WebGLExtensions(_gl);\n\n  //We know we are going to be using some extensions for sure\n  extensions.get('EXT_texture_filter_anisotropic');\n  extensions.get('WEBGL_compressed_texture_s3tc');\n\n  if (!_isWebGL2) {\n\n    extensions.get('OES_texture_float');\n    extensions.get('OES_texture_float_linear');\n    extensions.get('OES_texture_half_float');\n    extensions.get('OES_texture_half_float_linear');\n    extensions.get('OES_standard_derivatives');\n    extensions.get('EXT_shader_texture_lod');\n\n    _glExtensionDrawBuffers = extensions.get('WEBGL_draw_buffers');\n    _glExtensionInstancedArrays = extensions.get('ANGLE_instanced_arrays');\n    _glExtensionVAO = extensions.get('OES_vertex_array_object');\n\n  } else {\n\n    extensions.get('EXT_color_buffer_float');\n\n  }\n\n\n\n  var glClearColor = function glClearColor(r, g, b, a) {\n\n    if (_premultipliedAlpha === true) {\n\n      r *= a;g *= a;b *= a;\n\n    }\n\n    _gl.clearColor(r, g, b, a);\n\n  };\n\n  var setDefaultGLState = function setDefaultGLState() {\n\n    _gl.clearColor(0, 0, 0, 1);\n    _gl.clearDepth(1);\n    _gl.clearStencil(0);\n\n    _gl.enable(_gl.DEPTH_TEST);\n    _gl.depthFunc(_gl.LEQUAL);\n\n    _gl.frontFace(_gl.CCW);\n    _gl.cullFace(_gl.BACK);\n    _gl.enable(_gl.CULL_FACE);\n\n    _gl.enable(_gl.BLEND);\n    _gl.blendEquation(_gl.FUNC_ADD);\n    _gl.blendFunc(_gl.SRC_ALPHA, _gl.ONE_MINUS_SRC_ALPHA);\n\n    _gl.viewport(_viewportX, _viewportY, _viewportWidth, _viewportHeight);\n\n    glClearColor(_clearColor.r, _clearColor.g, _clearColor.b, _clearAlpha);\n\n  };\n\n  var resetGLState = function resetGLState() {\n\n    _currentProgram = null;\n    _currentCamera = null;\n\n    _currentGeometryProgram = '';\n    _currentMaterialId = -1;\n\n    _lightsNeedUpdate = true;\n\n    state.reset();\n    state.disableUnusedAttributes();\n  };\n\n\n  setDefaultGLState();\n\n  this.context = _gl;\n  this.state = state;\n\n  // GPU capabilities\n\n  var _maxTextures = _gl.getParameter(_gl.MAX_TEXTURE_IMAGE_UNITS);\n  var _maxVertexTextures = _gl.getParameter(_gl.MAX_VERTEX_TEXTURE_IMAGE_UNITS);\n  var _maxTextureSize = _gl.getParameter(_gl.MAX_TEXTURE_SIZE);\n  var _maxCubemapSize = _gl.getParameter(_gl.MAX_CUBE_MAP_TEXTURE_SIZE);\n\n  var _supportsVertexTextures = _maxVertexTextures > 0;\n  // not used, though used in three.js's version:\n  //var _supportsBoneTextures = _supportsVertexTextures && extensions.get( 'OES_texture_float' );\n\n\n  var _vertexShaderPrecisionHighpFloat = _gl.getShaderPrecisionFormat(_gl.VERTEX_SHADER, _gl.HIGH_FLOAT);\n  var _vertexShaderPrecisionMediumpFloat = _gl.getShaderPrecisionFormat(_gl.VERTEX_SHADER, _gl.MEDIUM_FLOAT);\n  //var _vertexShaderPrecisionLowpFloat = _gl.getShaderPrecisionFormat( _gl.VERTEX_SHADER, _gl.LOW_FLOAT );\n\n  var _fragmentShaderPrecisionHighpFloat = _gl.getShaderPrecisionFormat(_gl.FRAGMENT_SHADER, _gl.HIGH_FLOAT);\n  var _fragmentShaderPrecisionMediumpFloat = _gl.getShaderPrecisionFormat(_gl.FRAGMENT_SHADER, _gl.MEDIUM_FLOAT);\n  //var _fragmentShaderPrecisionLowpFloat = _gl.getShaderPrecisionFormat( _gl.FRAGMENT_SHADER, _gl.LOW_FLOAT );\n\n  // Sometimes a texture is not actually available to bind. We use _nullTexture so that the uniform sampler2D\n  // is bound to something, so that we don't get a warning from Chrome.\n  var pixels = new Uint8Array(16);\n\n  // checkerboard\n  for (var i = 0; i < 4; i++) {\n    // for debugging - gives a pink and green pattern, which will show textures that are not loaded properly.\n    // Sometimes textures are not loaded yet and so will use this texture temporarily, so we don't normally load this pattern.\n    if (DEBUG_TEXTURE_LOAD) {\n      if (i === 1 || i === 2) {\n        pixels[i * 4] = 246;\n        pixels[i * 4 + 1] = 140;\n        pixels[i * 4 + 2] = 220;\n      } else {\n        pixels[i * 4] = 48;\n        pixels[i * 4 + 1] = 195;\n        pixels[i * 4 + 2] = 3;\n      }\n    } else {\n      // black - we actually use this color as a sign that the texture is not loaded for Graphite and take corrective action there.\n      pixels[i * 4] =\n      pixels[i * 4 + 1] =\n      pixels[i * 4 + 2] = 0;\n    }\n    pixels[i * 4 + 3] = 255;\n  }\n\n  var _nullTexture = new THREE.DataTexture(pixels, 2, 2, THREE.RGBAFormat, THREE.UnsignedByteType, THREE.UVMapping,\n  THREE.RepeatWrapping, THREE.RepeatWrapping,\n  THREE.NearestFilter, THREE.NearestFilter);\n  _nullTexture.needsUpdate = true;\n\n  var getCompressedTextureFormats = function () {\n\n    var array;\n\n    return function () {\n\n      if (array !== undefined) {\n\n        return array;\n\n      }\n\n      array = [];\n\n      if (extensions.get('WEBGL_compressed_texture_pvrtc') || extensions.get('WEBGL_compressed_texture_s3tc')) {\n\n        var formats = _gl.getParameter(_gl.COMPRESSED_TEXTURE_FORMATS);\n\n        for (var i = 0; i < formats.length; i++) {\n\n          array.push(formats[i]);\n\n        }\n\n      }\n\n      return array;\n\n    };\n\n  }();\n\n\n  // clamp precision to maximum available\n\n  var highpAvailable = _vertexShaderPrecisionHighpFloat.precision > 0;\n  var mediumpAvailable = _vertexShaderPrecisionMediumpFloat.precision > 0;\n\n  if (_precisionVertex === \"highp\" && !highpAvailable) {\n\n    if (mediumpAvailable) {\n\n      _precisionVertex = \"mediump\";\n      THREE.warn(\"WebGLRenderer: highp not supported, using mediump\");\n\n    } else {\n\n      _precisionVertex = \"lowp\";\n      THREE.warn(\"WebGLRenderer: highp and mediump not supported, using lowp\");\n\n    }\n\n  }\n\n  if (_precisionVertex === \"mediump\" && !mediumpAvailable) {\n\n    _precisionVertex = \"lowp\";\n    THREE.warn(\"WebGLRenderer: mediump not supported, using lowp\");\n\n  }\n\n  highpAvailable = _fragmentShaderPrecisionHighpFloat.precision > 0;\n  mediumpAvailable = _fragmentShaderPrecisionMediumpFloat.precision > 0;\n\n  if (_precisionFragment === \"highp\" && !highpAvailable) {\n\n    if (mediumpAvailable) {\n\n      _precisionFragment = \"mediump\";\n      THREE.warn(\"WebGLRenderer: highp not supported, using mediump\");\n\n    } else {\n\n      _precisionFragment = \"lowp\";\n      THREE.warn(\"WebGLRenderer: highp and mediump not supported, using lowp\");\n\n    }\n\n  }\n\n  if (_precisionFragment === \"mediump\" && !mediumpAvailable) {\n\n    _precisionFragment = \"lowp\";\n    THREE.warn(\"WebGLRenderer: mediump not supported, using lowp\");\n\n  }\n\n\n\n  // API\n\n  this.getContext = function () {\n\n    return _gl;\n\n  };\n\n  this.isWebGL2 = function () {\n\n    return _isWebGL2;\n\n  };\n\n  this.forceContextLoss = function () {\n\n    extensions.get('WEBGL_lose_context').loseContext();\n\n  };\n\n  this.supportsVertexTextures = function () {\n\n    return _supportsVertexTextures;\n\n  };\n\n  this.supportsFloatTextures = function () {\n\n    return _isWebGL2 || extensions.get('OES_texture_float');\n\n  };\n\n  this.supportsHalfFloatTextures = function () {\n\n    return _isWebGL2 || extensions.get('OES_texture_half_float_linear');\n\n  };\n\n  this.supportsStandardDerivatives = function () {\n\n    return _isWebGL2 || extensions.get('OES_standard_derivatives');\n\n  };\n\n  this.supportsCompressedTextureS3TC = function () {\n\n    return _isWebGL2 || extensions.get('WEBGL_compressed_texture_s3tc');\n\n  };\n\n  this.supportsElementIndexUint = function () {\n\n    return _isWebGL2 || extensions.get('OES_element_index_uint');\n\n  };\n\n  this.supportsMRT = function () {\n    return _isWebGL2 || !_blockMRT && _glExtensionDrawBuffers;\n  };\n\n  this.supportsInstancedArrays = function () {\n    return _isWebGL2 || !!_glExtensionInstancedArrays;\n  };\n\n  this.supportsBlendMinMax = function () {\n\n    return _isWebGL2 || extensions.get('EXT_blend_minmax');\n\n  };\n\n  this.getMaxAnisotropy = function () {\n\n    var value;\n\n    return function () {\n\n      if (value !== undefined) {\n\n        return value;\n\n      }\n\n      var extension = extensions.get('EXT_texture_filter_anisotropic');\n\n      value = extension !== null ? _gl.getParameter(extension.MAX_TEXTURE_MAX_ANISOTROPY_EXT) : 0;\n\n      return value;\n\n    };\n\n  }();\n\n  this.getPixelRatio = function () {\n    return _pixelRatio || _window.devicePixelRatio || 1;\n  };\n  /**\n      * Sets a custom pixel ratio instead of the device's.\n      * Set to a falsy value to restore the devicePixelRatio;\n      * @param {Number|null} value\n      */\n  this.setPixelRatio = function (value) {\n    _pixelRatio = value;\n  };\n\n  /**\n      * @returns {WebGLFramebuffer} Currently bound framebuffer\n      */\n  this.getCurrentFramebuffer = function () {\n    return _currentFramebuffer;\n  };\n\n  this.setSize = function (width, height, updateStyle) {\n    var pixelRatio = this.getPixelRatio();\n    _canvas.width = width * pixelRatio;\n    _canvas.height = height * pixelRatio;\n\n    if (updateStyle !== false) {\n\n      _canvas.style.width = width + 'px';\n      _canvas.style.height = height + 'px';\n\n    }\n\n    this.setViewport(0, 0, width, height);\n  };\n\n  this.setViewport = function (x, y, width, height) {\n    var pixelRatio = this.getPixelRatio();\n    _viewportX = x * pixelRatio;\n    _viewportY = y * pixelRatio;\n\n    _viewportWidth = width * pixelRatio;\n    _viewportHeight = height * pixelRatio;\n\n    _gl.viewport(_viewportX, _viewportY, _viewportWidth, _viewportHeight);\n  };\n\n  // By default, setting a viewport only affects rendering to the framebuffer. I.e., when setting an offscreen \n  // target, gl viewport is set to the target size. This makes sure that a RenderTarget is always properly filled by default - independent of its resolution.\n  // \n  // Setting resetViewportOnSetTarget to true avoids this behavior, so that the current viewport is also be preserved when using offscreen targets.\n  var _enableViewportOnOffscreenTargets = false;\n  this.enableViewportOnOffscreenTargets = function (enable) {\n    _enableViewportOnOffscreenTargets = enable;\n  };\n\n  var _viewportStack = [];\n\n  /** Push current viewport to viewport stack, so that it can be recovered by popViewport later. */\n  this.pushViewport = function () {\n    _viewportStack.push(_viewportX);\n    _viewportStack.push(_viewportY);\n    _viewportStack.push(_viewportWidth);\n    _viewportStack.push(_viewportHeight);\n  };\n\n  /** Recover previously pushed viewport.*/\n  this.popViewport = function () {\n    var index = _viewportStack.length - 4;\n    _viewportX = _viewportStack[index];\n    _viewportY = _viewportStack[index + 1];\n    _viewportWidth = _viewportStack[index + 2];\n    _viewportHeight = _viewportStack[index + 3];\n    _gl.viewport(_viewportX, _viewportY, _viewportWidth, _viewportHeight);\n\n    _viewportStack.length = index;\n  };\n\n  this.setScissor = function (x, y, width, height) {\n    var pixelRatio = this.getPixelRatio();\n    _gl.scissor(\n    x * pixelRatio,\n    y * pixelRatio,\n    width * pixelRatio,\n    height * pixelRatio);\n\n\n  };\n\n  this.enableScissorTest = function (enable) {\n\n    if (enable) {\n      _gl.enable(_gl.SCISSOR_TEST);\n    } else {\n      _gl.disable(_gl.SCISSOR_TEST);\n    }\n\n  };\n\n  this.setLoadingAnimationDuration = function (duration) {\n    _loadingAnimationDuration = duration;\n  };\n\n  this.getLoadingAnimationDuration = function () {\n    return _loadingAnimationDuration;\n  };\n\n  // Clearing\n\n  this.getClearColor = function () {\n\n    return _clearColor;\n\n  };\n\n  this.setClearColor = function (color, alpha) {\n\n    _clearColor.set(color);\n    _clearAlpha = alpha !== undefined ? alpha : 1;\n\n    glClearColor(_clearColor.r, _clearColor.g, _clearColor.b, _clearAlpha);\n\n  };\n\n  this.getClearAlpha = function () {\n\n    return _clearAlpha;\n\n  };\n\n  this.setClearAlpha = function (alpha) {\n\n    _clearAlpha = alpha;\n\n    glClearColor(_clearColor.r, _clearColor.g, _clearColor.b, _clearAlpha);\n\n  };\n\n  this.clear = function (color, depth, stencil) {\n\n    var bits = 0;\n\n    if (color === undefined || color) bits |= _gl.COLOR_BUFFER_BIT;\n    if (depth === undefined || depth) bits |= _gl.DEPTH_BUFFER_BIT;\n    if (stencil === undefined || stencil) bits |= _gl.STENCIL_BUFFER_BIT;\n\n    _gl.clear(bits);\n\n  };\n\n  this.clearColor = function () {\n\n    _gl.clear(_gl.COLOR_BUFFER_BIT);\n\n  };\n\n  this.clearDepth = function () {\n\n    _gl.clear(_gl.DEPTH_BUFFER_BIT);\n\n  };\n\n  this.clearStencil = function () {\n\n    _gl.clear(_gl.STENCIL_BUFFER_BIT);\n\n  };\n\n  this.clearTarget = function (renderTarget, color, depth, stencil) {\n\n    this.setRenderTarget(renderTarget);\n    this.clear(color, depth, stencil);\n\n  };\n\n\n  // Reset\n\n  this.resetGLState = resetGLState;\n\n  // Internal functions\n\n  // Buffer allocation\n\n  function createLineBuffers(geometry) {\n\n    geometry.__webglVertexBuffer = _gl.createBuffer();\n    geometry.__webglColorBuffer = _gl.createBuffer();\n    geometry.__webglLineDistanceBuffer = _gl.createBuffer();\n\n    _this.info.memory.geometries++;\n  }\n\n  function createPointCloudBuffers(geometry) {\n\n    geometry.__webglVertexBuffer = _gl.createBuffer();\n    geometry.__webglColorBuffer = _gl.createBuffer();\n\n    _this.info.memory.geometries++;\n  }\n\n  function createMeshBuffers(geometryGroup) {\n\n    geometryGroup.__webglVertexBuffer = _gl.createBuffer();\n    geometryGroup.__webglNormalBuffer = _gl.createBuffer();\n    geometryGroup.__webglTangentBuffer = _gl.createBuffer();\n    geometryGroup.__webglColorBuffer = _gl.createBuffer();\n    geometryGroup.__webglUVBuffer = _gl.createBuffer();\n    geometryGroup.__webglUV2Buffer = _gl.createBuffer();\n\n    geometryGroup.__webglSkinIndicesBuffer = _gl.createBuffer();\n    geometryGroup.__webglSkinWeightsBuffer = _gl.createBuffer();\n\n    geometryGroup.__webglFaceBuffer = _gl.createBuffer();\n    geometryGroup.__webglLineBuffer = _gl.createBuffer();\n\n    _this.info.memory.geometries++;\n\n  }\n\n  // Events\n\n  var onObjectRemoved = function onObjectRemoved(event) {\n\n    var object = event.target;\n\n    object.traverse(function (child) {\n\n      child.removeEventListener('remove', onObjectRemoved);\n\n      removeObject(child);\n\n    });\n\n  };\n\n  var onGeometryDispose = function onGeometryDispose(event) {\n\n    var geometry = event.target;\n\n    geometry.removeEventListener('dispose', onGeometryDispose);\n\n    deallocateGeometry(geometry);\n\n  };\n\n  var onTextureDispose = function onTextureDispose(event) {\n\n    var texture = event.target;\n\n    texture.removeEventListener('dispose', onTextureDispose);\n\n    deallocateTexture(texture);\n\n    _this.info.memory.textures--;\n\n\n  };\n\n  var onRenderTargetDispose = function onRenderTargetDispose(event) {\n\n    var renderTarget = event.target;\n\n    renderTarget.removeEventListener('dispose', onRenderTargetDispose);\n\n    deallocateRenderTarget(renderTarget);\n\n    _this.info.memory.textures--;\n\n  };\n\n  var onMaterialDispose = function onMaterialDispose(event) {\n\n    var material = event.target;\n\n    material.removeEventListener('dispose', onMaterialDispose);\n\n    deallocateMaterial(material);\n\n  };\n\n  // Buffer deallocation\n\n  var deleteBuffers = function deleteBuffers(geometry) {\n\n    if (geometry.__webglVertexBuffer !== undefined) {_gl.deleteBuffer(geometry.__webglVertexBuffer);geometry.__webglVertexBuffer = undefined;}\n    if (geometry.__webglNormalBuffer !== undefined) {_gl.deleteBuffer(geometry.__webglNormalBuffer);geometry.__webglNormalBuffer = undefined;}\n    if (geometry.__webglTangentBuffer !== undefined) {_gl.deleteBuffer(geometry.__webglTangentBuffer);geometry.__webglTangentBuffer = undefined;}\n    if (geometry.__webglColorBuffer !== undefined) {_gl.deleteBuffer(geometry.__webglColorBuffer);geometry.__webglColorBuffer = undefined;}\n    if (geometry.__webglUVBuffer !== undefined) {_gl.deleteBuffer(geometry.__webglUVBuffer);geometry.__webglUVBuffer = undefined;}\n    if (geometry.__webglUV2Buffer !== undefined) {_gl.deleteBuffer(geometry.__webglUV2Buffer);geometry.__webglUV2Buffer = undefined;}\n\n    if (geometry.__webglSkinIndicesBuffer !== undefined) {_gl.deleteBuffer(geometry.__webglSkinIndicesBuffer);geometry.__webglSkinIndicesBuffer = undefined;}\n    if (geometry.__webglSkinWeightsBuffer !== undefined) {_gl.deleteBuffer(geometry.__webglSkinWeightsBuffer);geometry.__webglSkinWeightsBuffer = undefined;}\n\n    if (geometry.__webglFaceBuffer !== undefined) {_gl.deleteBuffer(geometry.__webglFaceBuffer);geometry.__webglFaceBuffer = undefined;}\n    if (geometry.__webglLineBuffer !== undefined) {_gl.deleteBuffer(geometry.__webglLineBuffer);geometry.__webglLineBuffer = undefined;}\n\n    if (geometry.__webglLineDistanceBuffer !== undefined) {_gl.deleteBuffer(geometry.__webglLineDistanceBuffer);geometry.__webglLineDistanceBuffer = undefined;}\n    // custom attributes\n\n    if (geometry.__webglCustomAttributesList !== undefined) {\n\n      for (var name in geometry.__webglCustomAttributesList) {\n\n        _gl.deleteBuffer(geometry.__webglCustomAttributesList[name].buffer);\n\n      }\n      geometry.__webglCustomAttributesList = undefined;\n    }\n\n    _this.info.memory.geometries--;\n\n  };\n\n\n  var deallocateGeometry = function deallocateGeometry(geometry) {\n\n    geometry.__webglInit = undefined;\n\n    var i, len, m, ml;\n\n    if (geometry instanceof THREE.BufferGeometry) {\n\n      //[Firefly] Delete interleaved buffer\n      if (geometry.vbbuffer !== undefined) {\n        _gl.deleteBuffer(geometry.vbbuffer);\n        geometry.vbbuffer = undefined;\n      }\n\n      //[Firefly] Delete index buffer (if not stored in vertex attribute object)\n      if (geometry.ibbuffer !== undefined) {\n        _gl.deleteBuffer(geometry.ibbuffer);\n        geometry.ibbuffer = undefined;\n      }\n      if (geometry.iblinesbuffer !== undefined) {\n        _gl.deleteBuffer(geometry.iblinesbuffer);\n        geometry.iblinesbuffer = undefined;\n      }\n\n      //[Firefly] Delete vertex array objects.\n      if (geometry.vaos) {\n        for (i = 0; i < geometry.vaos.length; i++) {\n          deleteVertexArray(geometry.vaos[i].vao);\n        }\n        geometry.vaos = undefined;\n      }\n\n      var attributes = geometry.attributes;\n\n      for (var key in attributes) {\n\n        if (attributes[key].buffer !== undefined) {\n\n          _gl.deleteBuffer(attributes[key].buffer);\n          attributes[key].buffer = undefined;\n        }\n\n      }\n\n      _this.info.memory.geometries--;\n\n    } else {\n\n      var geometryGroupsList = geometryGroups[geometry.id];\n\n      if (geometryGroupsList !== undefined) {\n\n        for (i = 0, len = geometryGroupsList.length; i < len; i++) {\n\n          var geometryGroup = geometryGroupsList[i];\n\n          if (geometryGroup.numMorphTargets !== undefined) {\n\n            for (m = 0, ml = geometryGroup.numMorphTargets; m < ml; m++) {\n\n              _gl.deleteBuffer(geometryGroup.__webglMorphTargetsBuffers[m]);\n\n            }\n\n            delete geometryGroup.__webglMorphTargetsBuffers;\n\n          }\n\n          if (geometryGroup.numMorphNormals !== undefined) {\n\n            for (m = 0, ml = geometryGroup.numMorphNormals; m < ml; m++) {\n\n              _gl.deleteBuffer(geometryGroup.__webglMorphNormalsBuffers[m]);\n\n            }\n\n            delete geometryGroup.__webglMorphNormalsBuffers;\n\n          }\n\n          deleteBuffers(geometryGroup);\n\n        }\n\n        delete geometryGroups[geometry.id];\n\n      } else {\n\n        deleteBuffers(geometry);\n\n      }\n\n    }\n\n  };\n\n  this.deallocateGeometry = deallocateGeometry;\n\n  var deallocateTexture = function deallocateTexture(texture) {\n\n    if (texture.__webglTextureCube) {\n\n      // cube texture\n\n      _gl.deleteTexture(texture.__webglTextureCube);\n      texture.__webglTextureCube = undefined;\n\n    } else {\n\n      // 2D texture\n\n      if (!texture.__webglInit) return;\n\n      _gl.deleteTexture(texture.__webglTexture);\n      texture.__webglInit = undefined;\n      texture.__webglTexture = undefined;\n    }\n\n  };\n\n  var deallocateRenderTarget = function deallocateRenderTarget(renderTarget) {\n\n    if (!renderTarget || !renderTarget.__webglTexture) return;\n\n    _gl.deleteTexture(renderTarget.__webglTexture);\n\n    _gl.deleteFramebuffer(renderTarget.__webglFramebuffer);\n    // if the z-buffer is shared among targets, the first deallocation will set this shared\n    // value to be undefined. Avoid calling WebGL with undefined parameters.\n    if (renderTarget.__webglRenderbuffer !== undefined) {\n      _gl.deleteRenderbuffer(renderTarget.__webglRenderbuffer);\n    }\n\n  };\n\n  var deallocateMaterial = function deallocateMaterial(material) {\n\n    var deleteProgram = false;\n    material.program = undefined;\n    material.programs.forEach(function (wrapper) {\n\n      var program;\n      if (wrapper === undefined || (program = wrapper.program) == undefined)\n      return;\n\n      // only deallocate GL program if this was the last use of shared program\n      // assumed there is only single copy of any program in the _programs list\n      // (that's how it's constructed)\n\n      var i, il, programInfo;\n\n      for (i = 0, il = _programs.length; i < il; i++) {\n\n        programInfo = _programs[i];\n\n        if (programInfo && programInfo.program === program) {\n\n          programInfo.usedTimes--;\n\n          if (programInfo.usedTimes === 0) {\n\n            _programs[i] = undefined;\n            _gl.deleteProgram(program);\n            _this.info.memory.programs--;\n            deleteProgram = true;\n\n          }\n\n          break;\n\n        }\n\n      }\n\n    }, false);\n\n    material.programs.length = 0;\n\n    if (deleteProgram) {\n\n      // avoid using array.splice, this is costlier than creating new array from scratch\n\n      _programs = _programs.filter(function (programInfo) {\n        return programInfo !== undefined;\n      });\n\n    }\n\n  };\n\n  // Buffer initialization\n\n  function initCustomAttributes(geometry, object) {\n\n    var nvertices = geometry.vertices.length;\n\n    var material = object.material;\n\n    if (material.attributes) {\n\n      if (geometry.__webglCustomAttributesList === undefined) {\n\n        geometry.__webglCustomAttributesList = [];\n\n      }\n\n      for (var a in material.attributes) {\n\n        var attribute = material.attributes[a];\n\n        if (!attribute.__webglInitialized || attribute.createUniqueBuffers) {\n\n          attribute.__webglInitialized = true;\n\n          var size = 1; // \"f\" and \"i\"\n\n          if (attribute.type === \"v2\") size = 2;else\n          if (attribute.type === \"v3\") size = 3;else\n          if (attribute.type === \"v4\") size = 4;else\n          if (attribute.type === \"c\") size = 3;\n\n          attribute.size = size;\n\n          attribute.array = new Float32Array(nvertices * size);\n\n          attribute.buffer = _gl.createBuffer();\n          attribute.buffer.belongsToAttribute = a;\n\n          attribute.needsUpdate = true;\n\n        }\n\n        geometry.__webglCustomAttributesList.push(attribute);\n\n      }\n\n    }\n\n  }\n\n  function initLineBuffers(geometry, object) {\n\n    var nvertices = geometry.vertices.length;\n\n    geometry.__vertexArray = new Float32Array(nvertices * 3);\n    geometry.__colorArray = new Float32Array(nvertices * 3);\n    geometry.__lineDistanceArray = new Float32Array(nvertices * 1);\n\n    geometry.__webglLineCount = nvertices;\n\n    initCustomAttributes(geometry, object);\n  }\n\n  function initPointCloudBuffers(geometry, object) {\n\n    var nvertices = geometry.vertices.length;\n\n    geometry.__vertexArray = new Float32Array(nvertices * 3);\n    geometry.__colorArray = new Float32Array(nvertices * 3);\n\n    geometry.__webglPointCount = nvertices;\n\n    initCustomAttributes(geometry, object);\n  }\n\n  function initMeshBuffers(geometryGroup, object) {\n\n    var geometry = object.geometry,\n    faces3 = geometryGroup.faces3,\n\n    nvertices = faces3.length * 3,\n    ntris = faces3.length * 1,\n    nlines = faces3.length * 3,\n\n    material = getBufferMaterial(object, geometryGroup),\n\n    uvType = bufferGuessUVType(material),\n    normalType = bufferGuessNormalType(material),\n    vertexColorType = bufferGuessVertexColorType(material);\n\n    // THREE.log( \"uvType\", uvType, \"normalType\", normalType, \"vertexColorType\", vertexColorType, object, geometryGroup, material );\n\n    geometryGroup.__vertexArray = new Float32Array(nvertices * 3);\n\n    if (normalType) {\n\n      geometryGroup.__normalArray = new Float32Array(nvertices * 3);\n\n    }\n\n    if (geometry.hasTangents) {\n\n      geometryGroup.__tangentArray = new Float32Array(nvertices * 4);\n\n    }\n\n    if (vertexColorType) {\n\n      geometryGroup.__colorArray = new Float32Array(nvertices * 3);\n\n    }\n\n    if (uvType) {\n\n      if (geometry.faceVertexUvs.length > 0) {\n\n        geometryGroup.__uvArray = new Float32Array(nvertices * 2);\n\n      }\n\n      if (geometry.faceVertexUvs.length > 1) {\n\n        geometryGroup.__uv2Array = new Float32Array(nvertices * 2);\n\n      }\n\n    }\n\n    if (object.geometry.skinWeights.length && object.geometry.skinIndices.length) {\n\n      geometryGroup.__skinIndexArray = new Float32Array(nvertices * 4);\n      geometryGroup.__skinWeightArray = new Float32Array(nvertices * 4);\n\n    }\n\n    var UintArray = (_isWebGL2 || extensions.get('OES_element_index_uint')) && ntris > 21845 ? Uint32Array : Uint16Array; // 65535 / 3\n\n    geometryGroup.__typeArray = UintArray;\n    geometryGroup.__faceArray = new UintArray(ntris * 3);\n    geometryGroup.__lineArray = new UintArray(nlines * 2);\n\n    geometryGroup.__webglFaceCount = ntris * 3;\n    geometryGroup.__webglLineCount = nlines * 2;\n\n\n    // custom attributes\n\n    if (material.attributes) {\n\n      if (geometryGroup.__webglCustomAttributesList === undefined) {\n\n        geometryGroup.__webglCustomAttributesList = [];\n\n      }\n\n      for (var a in material.attributes) {\n\n        // Do a shallow copy of the attribute object so different geometryGroup chunks use different\n        // attribute buffers which are correctly indexed in the setMeshBuffers function\n\n        var originalAttribute = material.attributes[a];\n\n        var attribute = {};\n\n        for (var property in originalAttribute) {\n\n          attribute[property] = originalAttribute[property];\n\n        }\n\n        if (!attribute.__webglInitialized || attribute.createUniqueBuffers) {\n\n          attribute.__webglInitialized = true;\n\n          var size = 1; // \"f\" and \"i\"\n\n          if (attribute.type === \"v2\") size = 2;else\n          if (attribute.type === \"v3\") size = 3;else\n          if (attribute.type === \"v4\") size = 4;else\n          if (attribute.type === \"c\") size = 3;\n\n          attribute.size = size;\n\n          attribute.array = new Float32Array(nvertices * size);\n\n          attribute.buffer = _gl.createBuffer();\n          attribute.buffer.belongsToAttribute = a;\n\n          originalAttribute.needsUpdate = true;\n          attribute.__original = originalAttribute;\n\n        }\n\n        geometryGroup.__webglCustomAttributesList.push(attribute);\n\n      }\n\n    }\n\n    geometryGroup.__inittedArrays = true;\n\n  }\n\n  function getBufferMaterial(object, geometryGroup) {\n\n    return object.material instanceof THREE.MeshFaceMaterial ?\n    object.material.materials[geometryGroup.materialIndex] : object.material;\n\n  }\n\n  function materialNeedsSmoothNormals(material) {\n\n    return material && material.shading !== undefined && material.shading === THREE.SmoothShading;\n\n  }\n\n  function bufferGuessNormalType(material) {\n\n    // only MeshBasicMaterial and MeshDepthMaterial don't need normals\n\n    if (material instanceof THREE.MeshBasicMaterial && !material.envMap || material instanceof THREE.MeshDepthMaterial) {\n\n      return false;\n\n    }\n\n    if (materialNeedsSmoothNormals(material)) {\n\n      return THREE.SmoothShading;\n\n    } else {\n\n      return THREE.FlatShading;\n\n    }\n\n  }\n\n  function bufferGuessVertexColorType(material) {\n\n    if (material.vertexColors) {\n\n      return material.vertexColors;\n\n    }\n\n    return false;\n\n  }\n\n  function bufferGuessUVType(material) {\n\n    // material must use some texture to require uvs\n\n    if (material.map ||\n    material.lightMap ||\n    material.bumpMap ||\n    material.normalMap ||\n    material.specularMap ||\n    material.alphaMap ||\n    material instanceof THREE.ShaderMaterial) {\n\n      return true;\n\n    }\n\n    return false;\n\n  }\n\n\n  // Buffer setting\n\n\n  function setLineBuffers(geometry, hint) {\n\n    var v,c,d,vertex,offset,color,\n\n    vertices = geometry.vertices,\n    colors = geometry.colors,\n    lineDistances = geometry.lineDistances,\n\n    vl = vertices.length,\n    cl = colors.length,\n    dl = lineDistances.length,\n\n    vertexArray = geometry.__vertexArray,\n    colorArray = geometry.__colorArray,\n    lineDistanceArray = geometry.__lineDistanceArray,\n\n    dirtyVertices = geometry.verticesNeedUpdate,\n    dirtyColors = geometry.colorsNeedUpdate,\n    dirtyLineDistances = geometry.lineDistancesNeedUpdate,\n\n    customAttributes = geometry.__webglCustomAttributesList,\n\n    i,il,\n    ca,cal,value,\n    customAttribute;\n\n    if (dirtyVertices) {\n\n      for (v = 0; v < vl; v++) {\n\n        vertex = vertices[v];\n\n        offset = v * 3;\n\n        vertexArray[offset] = vertex.x;\n        vertexArray[offset + 1] = vertex.y;\n        vertexArray[offset + 2] = vertex.z;\n\n      }\n\n      _gl.bindBuffer(_gl.ARRAY_BUFFER, geometry.__webglVertexBuffer);\n      _gl.bufferData(_gl.ARRAY_BUFFER, vertexArray, hint);\n\n    }\n\n    if (dirtyColors) {\n\n      for (c = 0; c < cl; c++) {\n\n        color = colors[c];\n\n        offset = c * 3;\n\n        colorArray[offset] = color.r;\n        colorArray[offset + 1] = color.g;\n        colorArray[offset + 2] = color.b;\n\n      }\n\n      _gl.bindBuffer(_gl.ARRAY_BUFFER, geometry.__webglColorBuffer);\n      _gl.bufferData(_gl.ARRAY_BUFFER, colorArray, hint);\n\n    }\n\n    if (dirtyLineDistances) {\n\n      for (d = 0; d < dl; d++) {\n\n        lineDistanceArray[d] = lineDistances[d];\n\n      }\n\n      _gl.bindBuffer(_gl.ARRAY_BUFFER, geometry.__webglLineDistanceBuffer);\n      _gl.bufferData(_gl.ARRAY_BUFFER, lineDistanceArray, hint);\n\n    }\n\n    if (customAttributes) {\n\n      for (i = 0, il = customAttributes.length; i < il; i++) {\n\n        customAttribute = customAttributes[i];\n\n        if (customAttribute.needsUpdate && (\n        customAttribute.boundTo === undefined ||\n        customAttribute.boundTo === \"vertices\")) {\n\n          offset = 0;\n\n          cal = customAttribute.value.length;\n\n          if (customAttribute.size === 1) {\n\n            for (ca = 0; ca < cal; ca++) {\n\n              customAttribute.array[ca] = customAttribute.value[ca];\n\n            }\n\n          } else if (customAttribute.size === 2) {\n\n            for (ca = 0; ca < cal; ca++) {\n\n              value = customAttribute.value[ca];\n\n              customAttribute.array[offset] = value.x;\n              customAttribute.array[offset + 1] = value.y;\n\n              offset += 2;\n\n            }\n\n          } else if (customAttribute.size === 3) {\n\n            if (customAttribute.type === \"c\") {\n\n              for (ca = 0; ca < cal; ca++) {\n\n                value = customAttribute.value[ca];\n\n                customAttribute.array[offset] = value.r;\n                customAttribute.array[offset + 1] = value.g;\n                customAttribute.array[offset + 2] = value.b;\n\n                offset += 3;\n\n              }\n\n            } else {\n\n              for (ca = 0; ca < cal; ca++) {\n\n                value = customAttribute.value[ca];\n\n                customAttribute.array[offset] = value.x;\n                customAttribute.array[offset + 1] = value.y;\n                customAttribute.array[offset + 2] = value.z;\n\n                offset += 3;\n\n              }\n\n            }\n\n          } else if (customAttribute.size === 4) {\n\n            for (ca = 0; ca < cal; ca++) {\n\n              value = customAttribute.value[ca];\n\n              customAttribute.array[offset] = value.x;\n              customAttribute.array[offset + 1] = value.y;\n              customAttribute.array[offset + 2] = value.z;\n              customAttribute.array[offset + 3] = value.w;\n\n              offset += 4;\n\n            }\n\n          }\n\n          _gl.bindBuffer(_gl.ARRAY_BUFFER, customAttribute.buffer);\n          _gl.bufferData(_gl.ARRAY_BUFFER, customAttribute.array, hint);\n\n        }\n\n      }\n\n    }\n\n  }\n\n  function setPointCloudBuffers(geometry, hint) {\n\n    var v,c,vertex,offset,color,\n\n    vertices = geometry.vertices,\n    colors = geometry.colors,\n\n    vl = vertices.length,\n    cl = colors.length,\n\n    vertexArray = geometry.__vertexArray,\n    colorArray = geometry.__colorArray,\n\n    dirtyVertices = geometry.verticesNeedUpdate,\n    dirtyColors = geometry.colorsNeedUpdate,\n\n    customAttributes = geometry.__webglCustomAttributesList,\n\n    i,il,\n    ca,cal,value,\n    customAttribute;\n\n    if (dirtyVertices) {\n\n      for (v = 0; v < vl; v++) {\n\n        vertex = vertices[v];\n\n        offset = v * 3;\n\n        vertexArray[offset] = vertex.x;\n        vertexArray[offset + 1] = vertex.y;\n        vertexArray[offset + 2] = vertex.z;\n\n      }\n\n      _gl.bindBuffer(_gl.ARRAY_BUFFER, geometry.__webglVertexBuffer);\n      _gl.bufferData(_gl.ARRAY_BUFFER, vertexArray, hint);\n\n    }\n\n    if (dirtyColors) {\n\n      for (c = 0; c < cl; c++) {\n\n        color = colors[c];\n\n        offset = c * 3;\n\n        colorArray[offset] = color.r;\n        colorArray[offset + 1] = color.g;\n        colorArray[offset + 2] = color.b;\n\n      }\n\n      _gl.bindBuffer(_gl.ARRAY_BUFFER, geometry.__webglColorBuffer);\n      _gl.bufferData(_gl.ARRAY_BUFFER, colorArray, hint);\n\n    }\n\n    if (customAttributes) {\n\n      for (i = 0, il = customAttributes.length; i < il; i++) {\n\n        customAttribute = customAttributes[i];\n\n        if (customAttribute.needsUpdate && (\n        customAttribute.boundTo === undefined ||\n        customAttribute.boundTo === \"vertices\")) {\n\n          offset = 0;\n\n          cal = customAttribute.value.length;\n\n          if (customAttribute.size === 1) {\n\n            for (ca = 0; ca < cal; ca++) {\n\n              customAttribute.array[ca] = customAttribute.value[ca];\n\n            }\n\n          } else if (customAttribute.size === 2) {\n\n            for (ca = 0; ca < cal; ca++) {\n\n              value = customAttribute.value[ca];\n\n              customAttribute.array[offset] = value.x;\n              customAttribute.array[offset + 1] = value.y;\n\n              offset += 2;\n\n            }\n\n          } else if (customAttribute.size === 3) {\n\n            if (customAttribute.type === \"c\") {\n\n              for (ca = 0; ca < cal; ca++) {\n\n                value = customAttribute.value[ca];\n\n                customAttribute.array[offset] = value.r;\n                customAttribute.array[offset + 1] = value.g;\n                customAttribute.array[offset + 2] = value.b;\n\n                offset += 3;\n\n              }\n\n            } else {\n\n              for (ca = 0; ca < cal; ca++) {\n\n                value = customAttribute.value[ca];\n\n                customAttribute.array[offset] = value.x;\n                customAttribute.array[offset + 1] = value.y;\n                customAttribute.array[offset + 2] = value.z;\n\n                offset += 3;\n\n              }\n\n            }\n\n          } else if (customAttribute.size === 4) {\n\n            for (ca = 0; ca < cal; ca++) {\n\n              value = customAttribute.value[ca];\n\n              customAttribute.array[offset] = value.x;\n              customAttribute.array[offset + 1] = value.y;\n              customAttribute.array[offset + 2] = value.z;\n              customAttribute.array[offset + 3] = value.w;\n\n              offset += 4;\n\n            }\n\n          }\n\n          _gl.bindBuffer(_gl.ARRAY_BUFFER, customAttribute.buffer);\n          _gl.bufferData(_gl.ARRAY_BUFFER, customAttribute.array, hint);\n\n        }\n\n      }\n\n    }\n\n  }\n\n  function setMeshBuffers(geometryGroup, object, hint, dispose, material) {\n\n    if (!geometryGroup.__inittedArrays) {\n\n      return;\n\n    }\n\n    var normalType = bufferGuessNormalType(material),\n    vertexColorType = bufferGuessVertexColorType(material),\n    uvType = bufferGuessUVType(material),\n\n    needsSmoothNormals = normalType === THREE.SmoothShading;\n\n    var f,fl,fi,face,\n    vertexNormals,faceNormal,\n    vertexColors,faceColor,\n    vertexTangents,\n    uv,uv2,v1,v2,v3,t1,t2,t3,\n    c1,c2,c3,\n    i,il,\n    vn,uvi,uv2i,\n\n    vertexIndex = 0,\n\n    offset = 0,\n    offset_uv = 0,\n    offset_uv2 = 0,\n    offset_face = 0,\n    offset_normal = 0,\n    offset_tangent = 0,\n    offset_line = 0,\n    offset_color = 0,\n    offset_custom = 0,\n\n    value,\n\n    vertexArray = geometryGroup.__vertexArray,\n    uvArray = geometryGroup.__uvArray,\n    uv2Array = geometryGroup.__uv2Array,\n    normalArray = geometryGroup.__normalArray,\n    tangentArray = geometryGroup.__tangentArray,\n    colorArray = geometryGroup.__colorArray,\n\n    customAttributes = geometryGroup.__webglCustomAttributesList,\n    customAttribute,\n\n    faceArray = geometryGroup.__faceArray,\n    lineArray = geometryGroup.__lineArray,\n\n    geometry = object.geometry, // this is shared for all chunks\n\n    dirtyVertices = geometry.verticesNeedUpdate,\n    dirtyElements = geometry.elementsNeedUpdate,\n    dirtyUvs = geometry.uvsNeedUpdate,\n    dirtyNormals = geometry.normalsNeedUpdate,\n    dirtyTangents = geometry.tangentsNeedUpdate,\n    dirtyColors = geometry.colorsNeedUpdate,\n\n    vertices = geometry.vertices,\n    chunk_faces3 = geometryGroup.faces3,\n    obj_faces = geometry.faces,\n\n    obj_uvs = geometry.faceVertexUvs[0],\n    obj_uvs2 = geometry.faceVertexUvs[1];\n\n    if (dirtyVertices) {\n\n      for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n        face = obj_faces[chunk_faces3[f]];\n\n        v1 = vertices[face.a];\n        v2 = vertices[face.b];\n        v3 = vertices[face.c];\n\n        vertexArray[offset] = v1.x;\n        vertexArray[offset + 1] = v1.y;\n        vertexArray[offset + 2] = v1.z;\n\n        vertexArray[offset + 3] = v2.x;\n        vertexArray[offset + 4] = v2.y;\n        vertexArray[offset + 5] = v2.z;\n\n        vertexArray[offset + 6] = v3.x;\n        vertexArray[offset + 7] = v3.y;\n        vertexArray[offset + 8] = v3.z;\n\n        offset += 9;\n\n      }\n\n      _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglVertexBuffer);\n      _gl.bufferData(_gl.ARRAY_BUFFER, vertexArray, hint);\n\n    }\n\n\n    if (dirtyColors && vertexColorType) {\n\n      for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n        face = obj_faces[chunk_faces3[f]];\n\n        vertexColors = face.vertexColors;\n        faceColor = face.color;\n\n        if (vertexColors.length === 3 && vertexColorType === THREE.VertexColors) {\n\n          c1 = vertexColors[0];\n          c2 = vertexColors[1];\n          c3 = vertexColors[2];\n\n        } else {\n\n          c1 = faceColor;\n          c2 = faceColor;\n          c3 = faceColor;\n\n        }\n\n        colorArray[offset_color] = c1.r;\n        colorArray[offset_color + 1] = c1.g;\n        colorArray[offset_color + 2] = c1.b;\n\n        colorArray[offset_color + 3] = c2.r;\n        colorArray[offset_color + 4] = c2.g;\n        colorArray[offset_color + 5] = c2.b;\n\n        colorArray[offset_color + 6] = c3.r;\n        colorArray[offset_color + 7] = c3.g;\n        colorArray[offset_color + 8] = c3.b;\n\n        offset_color += 9;\n\n      }\n\n      if (offset_color > 0) {\n\n        _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglColorBuffer);\n        _gl.bufferData(_gl.ARRAY_BUFFER, colorArray, hint);\n\n      }\n\n    }\n\n    if (dirtyTangents && geometry.hasTangents) {\n\n      for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n        face = obj_faces[chunk_faces3[f]];\n\n        vertexTangents = face.vertexTangents;\n\n        t1 = vertexTangents[0];\n        t2 = vertexTangents[1];\n        t3 = vertexTangents[2];\n\n        tangentArray[offset_tangent] = t1.x;\n        tangentArray[offset_tangent + 1] = t1.y;\n        tangentArray[offset_tangent + 2] = t1.z;\n        tangentArray[offset_tangent + 3] = t1.w;\n\n        tangentArray[offset_tangent + 4] = t2.x;\n        tangentArray[offset_tangent + 5] = t2.y;\n        tangentArray[offset_tangent + 6] = t2.z;\n        tangentArray[offset_tangent + 7] = t2.w;\n\n        tangentArray[offset_tangent + 8] = t3.x;\n        tangentArray[offset_tangent + 9] = t3.y;\n        tangentArray[offset_tangent + 10] = t3.z;\n        tangentArray[offset_tangent + 11] = t3.w;\n\n        offset_tangent += 12;\n\n      }\n\n      _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglTangentBuffer);\n      _gl.bufferData(_gl.ARRAY_BUFFER, tangentArray, hint);\n\n    }\n\n    if (dirtyNormals && normalType) {\n\n      for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n        face = obj_faces[chunk_faces3[f]];\n\n        vertexNormals = face.vertexNormals;\n        faceNormal = face.normal;\n\n        if (vertexNormals.length === 3 && needsSmoothNormals) {\n\n          for (i = 0; i < 3; i++) {\n\n            vn = vertexNormals[i];\n\n            normalArray[offset_normal] = vn.x;\n            normalArray[offset_normal + 1] = vn.y;\n            normalArray[offset_normal + 2] = vn.z;\n\n            offset_normal += 3;\n\n          }\n\n        } else {\n\n          for (i = 0; i < 3; i++) {\n\n            normalArray[offset_normal] = faceNormal.x;\n            normalArray[offset_normal + 1] = faceNormal.y;\n            normalArray[offset_normal + 2] = faceNormal.z;\n\n            offset_normal += 3;\n\n          }\n\n        }\n\n      }\n\n      _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglNormalBuffer);\n      _gl.bufferData(_gl.ARRAY_BUFFER, normalArray, hint);\n\n    }\n\n    if (dirtyUvs && obj_uvs && uvType) {\n\n      for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n        fi = chunk_faces3[f];\n\n        uv = obj_uvs[fi];\n\n        if (uv === undefined) continue;\n\n        for (i = 0; i < 3; i++) {\n\n          uvi = uv[i];\n\n          uvArray[offset_uv] = uvi.x;\n          uvArray[offset_uv + 1] = uvi.y;\n\n          offset_uv += 2;\n\n        }\n\n      }\n\n      if (offset_uv > 0) {\n\n        _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglUVBuffer);\n        _gl.bufferData(_gl.ARRAY_BUFFER, uvArray, hint);\n\n      }\n\n    }\n\n    if (dirtyUvs && obj_uvs2 && uvType) {\n\n      for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n        fi = chunk_faces3[f];\n\n        uv2 = obj_uvs2[fi];\n\n        if (uv2 === undefined) continue;\n\n        for (i = 0; i < 3; i++) {\n\n          uv2i = uv2[i];\n\n          uv2Array[offset_uv2] = uv2i.x;\n          uv2Array[offset_uv2 + 1] = uv2i.y;\n\n          offset_uv2 += 2;\n\n        }\n\n      }\n\n      if (offset_uv2 > 0) {\n\n        _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglUV2Buffer);\n        _gl.bufferData(_gl.ARRAY_BUFFER, uv2Array, hint);\n\n      }\n\n    }\n\n    if (dirtyElements) {\n\n      for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n        faceArray[offset_face] = vertexIndex;\n        faceArray[offset_face + 1] = vertexIndex + 1;\n        faceArray[offset_face + 2] = vertexIndex + 2;\n\n        offset_face += 3;\n\n        lineArray[offset_line] = vertexIndex;\n        lineArray[offset_line + 1] = vertexIndex + 1;\n\n        lineArray[offset_line + 2] = vertexIndex;\n        lineArray[offset_line + 3] = vertexIndex + 2;\n\n        lineArray[offset_line + 4] = vertexIndex + 1;\n        lineArray[offset_line + 5] = vertexIndex + 2;\n\n        offset_line += 6;\n\n        vertexIndex += 3;\n\n      }\n\n      _gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER, geometryGroup.__webglFaceBuffer);\n      _gl.bufferData(_gl.ELEMENT_ARRAY_BUFFER, faceArray, hint);\n\n      _gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER, geometryGroup.__webglLineBuffer);\n      _gl.bufferData(_gl.ELEMENT_ARRAY_BUFFER, lineArray, hint);\n\n    }\n\n    if (customAttributes) {\n\n      for (i = 0, il = customAttributes.length; i < il; i++) {\n\n        customAttribute = customAttributes[i];\n\n        if (!customAttribute.__original.needsUpdate) continue;\n\n        offset_custom = 0;\n\n        if (customAttribute.size === 1) {\n\n          if (customAttribute.boundTo === undefined || customAttribute.boundTo === \"vertices\") {\n\n            for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n              face = obj_faces[chunk_faces3[f]];\n\n              customAttribute.array[offset_custom] = customAttribute.value[face.a];\n              customAttribute.array[offset_custom + 1] = customAttribute.value[face.b];\n              customAttribute.array[offset_custom + 2] = customAttribute.value[face.c];\n\n              offset_custom += 3;\n\n            }\n\n          } else if (customAttribute.boundTo === \"faces\") {\n\n            for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n              value = customAttribute.value[chunk_faces3[f]];\n\n              customAttribute.array[offset_custom] = value;\n              customAttribute.array[offset_custom + 1] = value;\n              customAttribute.array[offset_custom + 2] = value;\n\n              offset_custom += 3;\n\n            }\n\n          }\n\n        } else if (customAttribute.size === 2) {\n\n          if (customAttribute.boundTo === undefined || customAttribute.boundTo === \"vertices\") {\n\n            for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n              face = obj_faces[chunk_faces3[f]];\n\n              v1 = customAttribute.value[face.a];\n              v2 = customAttribute.value[face.b];\n              v3 = customAttribute.value[face.c];\n\n              customAttribute.array[offset_custom] = v1.x;\n              customAttribute.array[offset_custom + 1] = v1.y;\n\n              customAttribute.array[offset_custom + 2] = v2.x;\n              customAttribute.array[offset_custom + 3] = v2.y;\n\n              customAttribute.array[offset_custom + 4] = v3.x;\n              customAttribute.array[offset_custom + 5] = v3.y;\n\n              offset_custom += 6;\n\n            }\n\n          } else if (customAttribute.boundTo === \"faces\") {\n\n            for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n              value = customAttribute.value[chunk_faces3[f]];\n\n              v1 = value;\n              v2 = value;\n              v3 = value;\n\n              customAttribute.array[offset_custom] = v1.x;\n              customAttribute.array[offset_custom + 1] = v1.y;\n\n              customAttribute.array[offset_custom + 2] = v2.x;\n              customAttribute.array[offset_custom + 3] = v2.y;\n\n              customAttribute.array[offset_custom + 4] = v3.x;\n              customAttribute.array[offset_custom + 5] = v3.y;\n\n              offset_custom += 6;\n\n            }\n\n          }\n\n        } else if (customAttribute.size === 3) {\n\n          var pp;\n\n          if (customAttribute.type === \"c\") {\n\n            pp = [\"r\", \"g\", \"b\"];\n\n          } else {\n\n            pp = [\"x\", \"y\", \"z\"];\n\n          }\n\n          if (customAttribute.boundTo === undefined || customAttribute.boundTo === \"vertices\") {\n\n            for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n              face = obj_faces[chunk_faces3[f]];\n\n              v1 = customAttribute.value[face.a];\n              v2 = customAttribute.value[face.b];\n              v3 = customAttribute.value[face.c];\n\n              customAttribute.array[offset_custom] = v1[pp[0]];\n              customAttribute.array[offset_custom + 1] = v1[pp[1]];\n              customAttribute.array[offset_custom + 2] = v1[pp[2]];\n\n              customAttribute.array[offset_custom + 3] = v2[pp[0]];\n              customAttribute.array[offset_custom + 4] = v2[pp[1]];\n              customAttribute.array[offset_custom + 5] = v2[pp[2]];\n\n              customAttribute.array[offset_custom + 6] = v3[pp[0]];\n              customAttribute.array[offset_custom + 7] = v3[pp[1]];\n              customAttribute.array[offset_custom + 8] = v3[pp[2]];\n\n              offset_custom += 9;\n\n            }\n\n          } else if (customAttribute.boundTo === \"faces\") {\n\n            for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n              value = customAttribute.value[chunk_faces3[f]];\n\n              v1 = value;\n              v2 = value;\n              v3 = value;\n\n              customAttribute.array[offset_custom] = v1[pp[0]];\n              customAttribute.array[offset_custom + 1] = v1[pp[1]];\n              customAttribute.array[offset_custom + 2] = v1[pp[2]];\n\n              customAttribute.array[offset_custom + 3] = v2[pp[0]];\n              customAttribute.array[offset_custom + 4] = v2[pp[1]];\n              customAttribute.array[offset_custom + 5] = v2[pp[2]];\n\n              customAttribute.array[offset_custom + 6] = v3[pp[0]];\n              customAttribute.array[offset_custom + 7] = v3[pp[1]];\n              customAttribute.array[offset_custom + 8] = v3[pp[2]];\n\n              offset_custom += 9;\n\n            }\n\n          } else if (customAttribute.boundTo === \"faceVertices\") {\n\n            for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n              value = customAttribute.value[chunk_faces3[f]];\n\n              v1 = value[0];\n              v2 = value[1];\n              v3 = value[2];\n\n              customAttribute.array[offset_custom] = v1[pp[0]];\n              customAttribute.array[offset_custom + 1] = v1[pp[1]];\n              customAttribute.array[offset_custom + 2] = v1[pp[2]];\n\n              customAttribute.array[offset_custom + 3] = v2[pp[0]];\n              customAttribute.array[offset_custom + 4] = v2[pp[1]];\n              customAttribute.array[offset_custom + 5] = v2[pp[2]];\n\n              customAttribute.array[offset_custom + 6] = v3[pp[0]];\n              customAttribute.array[offset_custom + 7] = v3[pp[1]];\n              customAttribute.array[offset_custom + 8] = v3[pp[2]];\n\n              offset_custom += 9;\n\n            }\n\n          }\n\n        } else if (customAttribute.size === 4) {\n\n          if (customAttribute.boundTo === undefined || customAttribute.boundTo === \"vertices\") {\n\n            for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n              face = obj_faces[chunk_faces3[f]];\n\n              v1 = customAttribute.value[face.a];\n              v2 = customAttribute.value[face.b];\n              v3 = customAttribute.value[face.c];\n\n              customAttribute.array[offset_custom] = v1.x;\n              customAttribute.array[offset_custom + 1] = v1.y;\n              customAttribute.array[offset_custom + 2] = v1.z;\n              customAttribute.array[offset_custom + 3] = v1.w;\n\n              customAttribute.array[offset_custom + 4] = v2.x;\n              customAttribute.array[offset_custom + 5] = v2.y;\n              customAttribute.array[offset_custom + 6] = v2.z;\n              customAttribute.array[offset_custom + 7] = v2.w;\n\n              customAttribute.array[offset_custom + 8] = v3.x;\n              customAttribute.array[offset_custom + 9] = v3.y;\n              customAttribute.array[offset_custom + 10] = v3.z;\n              customAttribute.array[offset_custom + 11] = v3.w;\n\n              offset_custom += 12;\n\n            }\n\n          } else if (customAttribute.boundTo === \"faces\") {\n\n            for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n              value = customAttribute.value[chunk_faces3[f]];\n\n              v1 = value;\n              v2 = value;\n              v3 = value;\n\n              customAttribute.array[offset_custom] = v1.x;\n              customAttribute.array[offset_custom + 1] = v1.y;\n              customAttribute.array[offset_custom + 2] = v1.z;\n              customAttribute.array[offset_custom + 3] = v1.w;\n\n              customAttribute.array[offset_custom + 4] = v2.x;\n              customAttribute.array[offset_custom + 5] = v2.y;\n              customAttribute.array[offset_custom + 6] = v2.z;\n              customAttribute.array[offset_custom + 7] = v2.w;\n\n              customAttribute.array[offset_custom + 8] = v3.x;\n              customAttribute.array[offset_custom + 9] = v3.y;\n              customAttribute.array[offset_custom + 10] = v3.z;\n              customAttribute.array[offset_custom + 11] = v3.w;\n\n              offset_custom += 12;\n\n            }\n\n          } else if (customAttribute.boundTo === \"faceVertices\") {\n\n            for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n              value = customAttribute.value[chunk_faces3[f]];\n\n              v1 = value[0];\n              v2 = value[1];\n              v3 = value[2];\n\n              customAttribute.array[offset_custom] = v1.x;\n              customAttribute.array[offset_custom + 1] = v1.y;\n              customAttribute.array[offset_custom + 2] = v1.z;\n              customAttribute.array[offset_custom + 3] = v1.w;\n\n              customAttribute.array[offset_custom + 4] = v2.x;\n              customAttribute.array[offset_custom + 5] = v2.y;\n              customAttribute.array[offset_custom + 6] = v2.z;\n              customAttribute.array[offset_custom + 7] = v2.w;\n\n              customAttribute.array[offset_custom + 8] = v3.x;\n              customAttribute.array[offset_custom + 9] = v3.y;\n              customAttribute.array[offset_custom + 10] = v3.z;\n              customAttribute.array[offset_custom + 11] = v3.w;\n\n              offset_custom += 12;\n\n            }\n\n          }\n\n        }\n\n        _gl.bindBuffer(_gl.ARRAY_BUFFER, customAttribute.buffer);\n        _gl.bufferData(_gl.ARRAY_BUFFER, customAttribute.array, hint);\n\n      }\n\n    }\n\n    if (dispose) {\n\n      delete geometryGroup.__inittedArrays;\n      delete geometryGroup.__colorArray;\n      delete geometryGroup.__normalArray;\n      delete geometryGroup.__tangentArray;\n      delete geometryGroup.__uvArray;\n      delete geometryGroup.__uv2Array;\n      delete geometryGroup.__faceArray;\n      delete geometryGroup.__vertexArray;\n      delete geometryGroup.__lineArray;\n      delete geometryGroup.__skinIndexArray;\n      delete geometryGroup.__skinWeightArray;\n\n    }\n\n  }\n\n\n  //[Firefly] This function is different from Three.js -- it adds\n  //support for interleaved buffers and drawing from system memory\n  //using a shared dynamic buffer.\n  function setDirectBuffers(geometry) {\n\n    //[Firefly]\n    //Geometries that will draw directly\n    //from system memory skip alocations of\n    //GPU side GL buffers.\n    if (geometry.streamingDraw) {\n\n      //Do we want just the index buffer on the GPU?\n      if (!geometry.streamingIndex) {\n        var index = geometry.attributes.index;\n        if (index) {\n          index.buffer = _gl.createBuffer();\n          _gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER, index.buffer);\n          _gl.bufferData(_gl.ELEMENT_ARRAY_BUFFER, index.array || geometry.ib, _gl.STATIC_DRAW);\n        }\n      }\n\n      return;\n    }\n\n\n    //[Firefly]\n    //Does the geometry have an interleaved\n    //vertex buffer?\n    if (geometry.vb && geometry.vbbuffer === undefined) {\n\n      geometry.vbbuffer = _gl.createBuffer();\n      geometry.vbNeedsUpdate = true;\n    }\n    //[Firefly] Is there an .ib property outside the index attribute (since we use globally shared attributes)?\n    if (geometry.ib && geometry.ibbuffer === undefined) {\n      geometry.ibbuffer = _gl.createBuffer();\n      _gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER, geometry.ibbuffer);\n      _gl.bufferData(_gl.ELEMENT_ARRAY_BUFFER, geometry.ib, _gl.STATIC_DRAW);\n    }\n    if (geometry.iblines && geometry.iblinesbuffer === undefined) {\n      geometry.iblinesbuffer = _gl.createBuffer();\n      _gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER, geometry.iblinesbuffer);\n      _gl.bufferData(_gl.ELEMENT_ARRAY_BUFFER, geometry.iblines, _gl.STATIC_DRAW);\n    }\n\n    var attributes = geometry.attributes;\n    var attributesKeys = geometry.attributesKeys;\n\n    for (var i = 0, len = attributesKeys.length; i < len; i++) {\n\n      var attributeName = attributesKeys[i];\n      var attributeItem = attributes[attributeName];\n      var isIndex = attributeName === 'index';\n\n      if (attributeItem.array &&\n      attributeItem.buffer === undefined) {\n\n        attributeItem.buffer = _gl.createBuffer();\n        attributeItem.needsUpdate = true;\n\n      }\n\n      if (attributeItem.needsUpdate === true) {\n\n        var bufferType = isIndex ? _gl.ELEMENT_ARRAY_BUFFER : _gl.ARRAY_BUFFER;\n\n        _gl.bindBuffer(bufferType, attributeItem.buffer);\n        _gl.bufferData(bufferType, attributeItem.array, _gl.STATIC_DRAW);\n\n        attributeItem.needsUpdate = false;\n\n      }\n\n    }\n\n    //Update the common interleaved vb if needed\n    if (geometry.vbNeedsUpdate) {\n\n      _gl.bindBuffer(_gl.ARRAY_BUFFER, geometry.vbbuffer);\n      _gl.bufferData(_gl.ARRAY_BUFFER, geometry.vb, _gl.STATIC_DRAW);\n      geometry.vbNeedsUpdate = false;\n\n      // free cpu-side copy (if wanted)\n      if (geometry.discardAfterUpload) {\n        geometry.vb = null;\n      }\n    }\n\n  }\n\n  //Wrappers for smoothing API differences between WebGL 1 and 2.\n\n  function createVertexArray() {\n    return _isWebGL2 ? _gl.createVertexArray() : _glExtensionVAO.createVertexArrayOES();\n  }\n\n  function bindVertexArray(vao) {\n    _isWebGL2 ? _gl.bindVertexArray(vao) : _glExtensionVAO.bindVertexArrayOES(vao);\n  }\n\n  function deleteVertexArray(vao) {\n    _isWebGL2 ? _gl.deleteVertexArray(vao) : _glExtensionVAO.deleteVertexArrayOES(vao);\n  }\n\n  function vertexAttribDivisor(programAttribute, numInstances, divisor) {\n    if (_isWebGL2) {\n      _gl.vertexAttribDivisor(programAttribute, numInstances ? divisor || 0 : 0);\n    } else if (_glExtensionInstancedArrays) {\n      _glExtensionInstancedArrays.vertexAttribDivisorANGLE(programAttribute, numInstances ? divisor || 0 : 0);\n    }\n\n  }\n\n  function drawElementsInstanced(geomType, count, type, offset, numInstances) {\n    if (_isWebGL2) {\n      _gl.drawElementsInstanced(geomType, count, type, offset, numInstances);\n    } else {\n      _glExtensionInstancedArrays.drawElementsInstancedANGLE(geomType, count, type, offset, numInstances);\n    }\n  }\n\n  function drawArraysInstanced(geomType, first, count, numInstances) {\n    if (_isWebGL2) {\n      _gl.drawArraysInstanced(geomType, first, count, numInstances);\n    } else {\n      _glExtensionInstancedArrays.drawArraysInstancedANGLE(geomType, first, count, numInstances);\n    }\n  }\n\n  // Buffer rendering\n\n  //[Firefly] Setup rendering of static model data using Vertex Array Objects\n  //Currently we only do this for buffer geometry that is on GPU memory and has no\n  //default material attributes and has a single draw batch (offsets array has length 1).\n  //Other geometry passes through setupVertexAttributes instead, to set up\n  //the vertex layout on every draw.\n  function setupVAO(material, program, geometry, uvChannel) {\n\n    var vao;\n\n    if (!USE_VAO || geometry.streamingDraw) {\n      geometry.vaos = null;\n      return false;\n    }\n\n    if (!_isWebGL2 && !_glExtensionVAO) {\n      geometry.vaos = null;\n      return false;\n    }\n\n    if (geometry.vaos === undefined)\n    geometry.vaos = [];\n\n    //Set up a VAO for this object\n    vao = createVertexArray();\n    geometry.vaos.push({ geomhash: program.id, uv: uvChannel, vao: vao });\n    bindVertexArray(vao);\n\n    //bind the index buffer\n    if (material.isEdgeMaterial) {\n      _gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER, geometry.iblinesbuffer);\n    } else {\n      var index = geometry.attributes.index;\n      if (index)\n      _gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER, geometry.ibbuffer || index.buffer);\n    }\n\n    //Bind the vertex attributes used by the current program\n    var boundBuffer = null;\n    var programAttributes = program.attributes;\n    var programAttributesKeys = program.attributesKeys;\n\n    var stride = geometry.vbstride;\n    var startIndex = geometry.offsets && geometry.offsets.length ? geometry.offsets[0].index : 0;\n    var instanceStart = geometry.offsets && geometry.offsets.length ? geometry.offsets[0].instanceStart || 0 : 0;\n\n    //Set up vertex attributes\n    for (var i = 0, len = programAttributesKeys.length; i < len; i++) {\n\n      var key = programAttributesKeys[i];\n      var programAttribute = programAttributes[key];\n\n      if (programAttribute >= 0) {\n\n        var geometryAttribute = geometry.attributes[key];\n\n        // Override 'uv' attribute mapping if uvChannel is specified\n        // (account for the 1-based indexing used for the additional UV channel attributes)\n        if (key === 'uv' && uvChannel) {\n          geometryAttribute = geometry.attributes['uv' + (uvChannel + 1)];\n        }\n\n        if (geometryAttribute) {\n\n          var type = _gl.FLOAT;\n          var itemWidth = geometryAttribute.bytesPerItem || 4;\n          if (itemWidth === 1) {\n            type = _gl.UNSIGNED_BYTE;\n          } else if (itemWidth === 2) {\n            type = _gl.UNSIGNED_SHORT;\n          }\n\n          _gl.enableVertexAttribArray(programAttribute);\n\n          var start = startIndex;\n          if (geometryAttribute.divisor)\n          start += instanceStart;\n          if (geometryAttribute.itemOffset !== undefined) //it's part of the interleaved VB, so process it here\n            {\n              if (boundBuffer != geometry.vbbuffer) {\n                _gl.bindBuffer(_gl.ARRAY_BUFFER, geometry.vbbuffer);\n                boundBuffer = geometry.vbbuffer;\n              }\n\n              _gl.vertexAttribPointer(programAttribute, geometryAttribute.itemSize, type, !!geometryAttribute.normalize, stride * 4, (geometryAttribute.itemOffset + start * stride) * 4);\n            } else\n          {\n            _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryAttribute.buffer);\n            boundBuffer = geometryAttribute.buffer;\n\n            _gl.vertexAttribPointer(programAttribute, geometryAttribute.itemSize, type, !!geometryAttribute.normalize, 0, start * geometryAttribute.itemSize * itemWidth); // 4 bytes per Float32\n          }\n\n          vertexAttribDivisor(programAttribute, geometry.numInstances, geometryAttribute.divisor);\n\n        } else {\n\n          //Default material attributes cannot be set in VAO, so we have to abort the VAO setup\n          //and fall back to the regular setupVertexAttributes in draw loop way.\n          //This is hopefully very rare.\n          bindVertexArray(null);\n\n          for (var j = 0; j < geometry.vaos.length; j++) {\n            deleteVertexArray(geometry.vaos[j].vao);}\n\n          geometry.vaos = null; //Flag it so we don't pass through here again.\n\n          return false;\n        }\n\n      }\n    }\n\n    return true;\n  }\n\n  function activateVAO(material, program, geometry, uvChannel) {\n    var vaos = geometry.vaos;\n\n    if (vaos) {\n      //The assumption is that this array is rarely bigger than one or two items,\n      //so it's faster to do a search than use object hashmap based on geomhash.\n      for (var i = 0, len = vaos.length; i < len; i++) {\n        var cache = vaos[i];\n        if (cache.geomhash === program.id && cache.uv === uvChannel) {\n          bindVertexArray(cache.vao);\n          return true;\n        }\n      }\n    } else if (vaos === null) {\n      return false;\n    }\n\n    return setupVAO(material, program, geometry, uvChannel);\n  }\n\n\n  function bindDynamic(dynBufName, srcData) {\n    var boundBuffer = _dynamicBuffers[dynBufName];\n    if (!boundBuffer) {\n      boundBuffer = _gl.createBuffer();\n      _dynamicBuffers[dynBufName] = boundBuffer;\n    }\n\n    _gl.bindBuffer(_gl.ARRAY_BUFFER, boundBuffer);\n    _gl.bufferData(_gl.ARRAY_BUFFER, srcData, _gl.DYNAMIC_DRAW);\n\n    return boundBuffer;\n  }\n\n\n  //[Firefly] This function is different from Three.js -- it adds\n  //support for interleaved buffers and drawing from system memory\n  //using a shared dynamic buffer.\n  function setupVertexAttributes(material, program, geometry, startIndex, indices, uvChannel, instanceStart) {\n\n    var programAttributes = program.attributes;\n    var programAttributesKeys = program.attributesKeys;\n\n    //Those two need to be unequal to begin with...\n    var boundBuffer = 0;\n    var interleavedBuffer;\n\n\n    if (indices) {\n      // indices (they can have a VBO even if the geometry part is streamed)\n      if (!indices.buffer && geometry.streamingDraw) {\n        var buffer = _dynamicBuffers.index;\n        if (!buffer) {\n          buffer = _gl.createBuffer();\n          _dynamicBuffers.index = buffer;\n        }\n\n        //_gl.bindBuffer( _gl.ELEMENT_ARRAY_BUFFER, null);\n        _gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER, buffer);\n\n        if (material.isEdgeMaterial) {\n          _gl.bufferData(_gl.ELEMENT_ARRAY_BUFFER, geometry.iblines, _gl.DYNAMIC_DRAW);\n        } else {\n          _gl.bufferData(_gl.ELEMENT_ARRAY_BUFFER, indices.array || geometry.ib, _gl.DYNAMIC_DRAW);\n        }\n      } else\n      {\n        if (material.isEdgeMaterial) {\n          _gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER, geometry.iblinesbuffer);\n        } else {\n          _gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER, geometry.ibbuffer || indices.buffer);\n        }\n      }\n    }\n\n\n    //Set attributes\n    for (var i = 0, len = programAttributesKeys.length; i < len; i++) {\n\n      var key = programAttributesKeys[i];\n      var programAttribute = programAttributes[key];\n\n      if (programAttribute >= 0) {\n\n        var geometryAttribute = geometry.attributes[key];\n        if (key === 'uv' && uvChannel) {\n          geometryAttribute = geometry.attributes['uv' + (uvChannel + 1)];\n        }\n\n        if (geometryAttribute) {\n\n          var isInterleaved = geometryAttribute.itemOffset !== undefined;\n\n          var stride, itemOffset;\n\n          if (isInterleaved) {\n\n            stride = geometry.vbstride;\n            itemOffset = geometryAttribute.itemOffset;\n\n            if (boundBuffer !== interleavedBuffer) {\n              if (geometry.streamingDraw) {\n\n                boundBuffer = bindDynamic('interleavedVB', geometry.vb);\n\n              } else {\n\n                boundBuffer = geometry.vbbuffer;\n                _gl.bindBuffer(_gl.ARRAY_BUFFER, boundBuffer);\n\n              }\n\n              interleavedBuffer = boundBuffer;\n            }\n\n          } else {\n\n            stride = geometryAttribute.itemSize;\n            itemOffset = 0;\n\n            if (geometry.streamingDraw) {\n\n              boundBuffer = bindDynamic(key, geometryAttribute.array);\n\n            } else {\n\n              boundBuffer = geometryAttribute.buffer;\n              _gl.bindBuffer(_gl.ARRAY_BUFFER, boundBuffer);\n\n            }\n          }\n\n          var type = _gl.FLOAT;\n          var itemWidth = geometryAttribute.bytesPerItem || 4;\n          if (itemWidth === 1) {\n            type = _gl.UNSIGNED_BYTE;\n          } else if (itemWidth === 2) {\n            type = _gl.UNSIGNED_SHORT;\n          }\n\n          if (isInterleaved)\n          itemWidth = 4; //our interleaved buffers define stride in multiples of 4 bytes\n\n          state.enableAttribute(programAttribute);\n          var start = startIndex;\n          if (geometryAttribute.divisor)\n          start += instanceStart;\n          _gl.vertexAttribPointer(programAttribute, geometryAttribute.itemSize, type, geometryAttribute.normalize, stride * itemWidth, (itemOffset + start * stride) * itemWidth);\n\n          vertexAttribDivisor(programAttribute, geometry.numInstances, geometryAttribute.divisor);\n\n        } else if (material.defaultAttributeValues) {\n\n          var attr = material.defaultAttributeValues[key];\n\n          if (attr && attr.length === 2) {\n\n            _gl.vertexAttrib2fv(programAttribute, material.defaultAttributeValues[key]);\n\n          } else if (attr && attr.length === 3) {\n\n            _gl.vertexAttrib3fv(programAttribute, material.defaultAttributeValues[key]);\n\n          } else if (attr && attr.length === 4) {\n\n            _gl.vertexAttrib4fv(programAttribute, material.defaultAttributeValues[key]);\n\n          }\n\n        }\n      }\n    }\n\n    state.disableUnusedAttributes();\n\n  }\n\n\n  // Buffer rendering\n\n  this.renderBufferDirect = function (camera, lights, fog, material, geometry, object, uvChannel) {\n\n    if (material.visible === false) return;\n\n    if (material.isEdgeMaterial && !geometry.iblines) return;\n\n    //updateObject(object);\n    setDirectBuffers(object.geometry);\n\n    var program = setProgram(camera, lights, fog, material, object);\n\n    var geometryAttributes = geometry.attributes;\n\n    var updateBuffers = false,\n    wireframeBit = material.wireframe ? 1 : 0,\n    geometryHash = 'direct_' + geometry.id + (uvChannel ? '/' + uvChannel : '') + '_' + program.id + '_' + wireframeBit;\n\n    if (geometryHash !== _currentGeometryProgram) {\n\n      _currentGeometryProgram = geometryHash;\n      updateBuffers = true;\n\n    }\n\n    // By default, we do a single drawcall for the whole geometry.\n    // Alternatively, geometry.offsets may specify one or more sub-drawcalls.\n    var hasDrawCalls = geometry.offsets && geometry.offsets.length;\n\n    // Even multiple draw-calls can usually be rendered with a single VAO or, if VAO is not available,\n    // with only a single call to setupVertexAttirbutes().\n    // Only exception is if the drawCalls require offsets into instanceBuffer or vertexBuffer.\n    // In this case, we have to force setupVertexAttribute() call per drawCall and cannot use a fixed buffer setup.\n    var updateBuffersPerDrawCall = hasDrawCalls && geometry.offsets.some(function (offset) {\n      return offset.index >= 0 || offset.instanceStart >= 0;\n    });\n\n    var vao;\n\n    if (updateBuffersPerDrawCall) {\n      // Do not use VAO here, because we must call setupVertexAttributes() anyway.\n      // Note that setVertexAttributes() must not be called when a VAO is bound. \n      //  1. Because it's pointless if you already have the VAO set.\n      //  2. Because state.enableAttribute() will modify the VAO scope instead of the global one. This is not expected\n      //     by WebGLState. As a consequence, the cache may think an attribute is enabled while it actually isn't.\n      //     Result is that the next mesh without VAO may just not show up.\n      updateBuffers = true;\n    } else {\n      vao = activateVAO(material, program, geometry, uvChannel || 0);\n      updateBuffers = updateBuffers && !vao;\n    }\n\n    if (updateBuffers) {\n      state.initAttributes();\n    }\n\n    // render mesh\n\n    var index = geometryAttributes.index;\n\n    // indexed triangles\n    var geomType;\n\n    if (index) {\n\n      var type, size;\n      var ib = index.array ? index.array : geometry.ib;\n\n      if (material.isEdgeMaterial) {\n        index = geometryAttributes.indexlines;\n        ib = geometry.iblines;\n      }\n\n      if (index.bytesPerItem) {\n        size = index.bytesPerItem;\n        if (size === 4) {\n          // load the unsigned integer index buffer extension if needed.\n          !_isWebGL2 && extensions.get('OES_element_index_uint');\n        }\n      } else {\n        if (ib instanceof Uint32Array && (_isWebGL2 || extensions.get('OES_element_index_uint'))) {\n          size = 4;\n        } else {\n          size = 2;\n        }\n      }\n\n      if (size === 4) {\n        type = _gl.UNSIGNED_INT;\n      } else {\n        type = _gl.UNSIGNED_SHORT;\n      }\n\n\n      var offsets = geometry.offsets;\n      if (hasDrawCalls && material.isEdgeMaterial && !offsets[0].hasOwnProperty(\"edgeStart\")) {\n        // This geometry isn't consolidated.\n        offsets = null;\n      }\n\n      var i = 0;\n      do\n      {\n        var startIndex, startOffset, count, instanceStart, numInstances;\n        if (hasDrawCalls)\n        {\n          var offset = offsets[i];\n          startIndex = offset.index;\n          startOffset = material.isEdgeMaterial ? offset.edgeStart || 0 : offset.start;\n          count = material.isEdgeMaterial ? offset.edgeCount || ib.length : offset.count;\n          instanceStart = offset.instanceStart || 0;\n          numInstances = offset.numInstances || geometry.numInstances;\n          var p_uniforms = material.program.uniforms;\n          if (p_uniforms.themingColor && 'themingColor' in offset) {\n            var color = offset.themingColor;\n            if (color instanceof THREE.Vector4) {\n              _gl.uniform4f(p_uniforms.themingColor, color.x, color.y, color.z, color.w);\n            } else {\n              _gl.uniform4f(p_uniforms.themingColor, 0.0, 0.0, 0.0, 0.0);\n            }\n          }\n        } else\n\n        {\n          startIndex = 0;\n          startOffset = 0;\n          count = ib.length;\n          instanceStart = 0;\n          numInstances = geometry.numInstances;\n        }\n\n        if (updateBuffers) {\n          setupVertexAttributes(material, program, geometry, startIndex, index, uvChannel, instanceStart);\n\n          // In most cases, it's sufficent to call setupVertexAttributes() just once in the first cycle.\n          if (!updateBuffersPerDrawCall) {\n            updateBuffers = false;\n          }\n        }\n\n        // render indexed triangles\n        geomType = _gl.TRIANGLES;\n        if (geometry.isPoints)\n        geomType = _gl.POINTS;else\n        if (geometry.isLines || material.isEdgeMaterial)\n        geomType = _gl.LINES;\n\n        if (numInstances)\n        drawElementsInstanced(geomType, count, type, startOffset * size, numInstances); // 2 bytes per Uint16\n        else {\n            _gl.drawElements(geomType, count, type, startOffset * size); // 2 bytes per Uint16\n\n          }\n\n      } while (offsets && ++i < offsets.length);\n\n      // non-indexed triangles\n\n    } else {\n\n      if (geometry.offsets && geometry.offsets.length > 1) {\n        console.error(\"Geometry with draw calls and no index buffer\");\n      }\n\n      if (updateBuffers) {\n\n        setupVertexAttributes(material, program, geometry, 0, undefined, uvChannel, 0);\n      }\n\n      var position = geometry.attributes.position;\n\n      // render non-indexed triangles\n      geomType = _gl.TRIANGLES;\n      if (geometry.isPoints)\n      geomType = _gl.POINTS;else\n      if (geometry.isLines || material.isEdgeMaterial)\n      geomType = _gl.LINES;\n      if (geometry.numInstances)\n      drawArraysInstanced(geomType, 0, position.array.length / 3, geometry.numInstances);else\n      {\n        _gl.drawArrays(geomType, 0, position.array.length / position.itemSize);\n      }\n\n    }\n\n    if (vao)\n    bindVertexArray(null);\n  };\n\n  this.renderBuffer = function (camera, lights, fog, material, geometryGroup, object) {\n\n    if (material.visible === false) return;\n\n    // Don't draw regular geometry with the edgeMaterial - it doesn't work.\n    if (material.isEdgeMaterial) return;\n\n    updateObject(object);\n\n    var program = setProgram(camera, lights, fog, material, object);\n\n    var attributes = program.attributes;\n\n    var updateBuffers = false,\n    wireframeBit = material.wireframe ? 1 : 0,\n    geometryGroupHash = geometryGroup.id + '_' + program.id + '_' + wireframeBit;\n\n    if (geometryGroupHash !== _currentGeometryProgram) {\n\n      _currentGeometryProgram = geometryGroupHash;\n      updateBuffers = true;\n\n    }\n\n    if (updateBuffers) {\n\n      state.initAttributes();\n\n    }\n\n    // vertices\n\n    // We need to make sure the divisor is 0 when we use this path.\n    function setVertexAttribute(index, size, type, normalized, stride, offset) {\n      _gl.vertexAttribPointer(index, size, type, normalized, stride, offset);\n      if (_glExtensionInstancedArrays) {\n        _glExtensionInstancedArrays.vertexAttribDivisorANGLE(index, 0);\n      }\n    }\n\n    if (!material.morphTargets && attributes.position >= 0) {\n\n      if (updateBuffers) {\n\n        _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglVertexBuffer);\n        state.enableAttribute(attributes.position);\n        setVertexAttribute(attributes.position, 3, _gl.FLOAT, false, 0, 0);\n\n      }\n\n    }\n\n\n    if (updateBuffers) {\n\n      // custom attributes\n\n      // Use the per-geometryGroup custom attribute arrays which are setup in initMeshBuffers\n\n      if (geometryGroup.__webglCustomAttributesList) {\n\n        for (var i = 0, il = geometryGroup.__webglCustomAttributesList.length; i < il; i++) {\n\n          var attribute = geometryGroup.__webglCustomAttributesList[i];\n\n          if (attributes[attribute.buffer.belongsToAttribute] >= 0) {\n\n            _gl.bindBuffer(_gl.ARRAY_BUFFER, attribute.buffer);\n            state.enableAttribute(attributes[attribute.buffer.belongsToAttribute]);\n            setVertexAttribute(attributes[attribute.buffer.belongsToAttribute], attribute.size, _gl.FLOAT, false, 0, 0);\n\n          }\n\n        }\n\n      }\n\n\n      // colors\n\n      if (attributes.color >= 0) {\n\n        if (object.geometry.colors.length > 0 || object.geometry.faces.length > 0) {\n\n          _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglColorBuffer);\n          state.enableAttribute(attributes.color);\n          setVertexAttribute(attributes.color, 3, _gl.FLOAT, false, 0, 0);\n\n        } else if (material.defaultAttributeValues) {\n\n\n          _gl.vertexAttrib3fv(attributes.color, material.defaultAttributeValues.color);\n\n        }\n\n      }\n\n      // normals\n\n      if (attributes.normal >= 0) {\n\n        _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglNormalBuffer);\n        state.enableAttribute(attributes.normal);\n        setVertexAttribute(attributes.normal, 3, _gl.FLOAT, false, 0, 0);\n\n      }\n\n      // tangents\n\n      if (attributes.tangent >= 0) {\n\n        _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglTangentBuffer);\n        state.enableAttribute(attributes.tangent);\n        setVertexAttribute(attributes.tangent, 4, _gl.FLOAT, false, 0, 0);\n\n      }\n\n      // uvs\n\n      if (attributes.uv >= 0) {\n\n        if (object.geometry.faceVertexUvs[0]) {\n\n          _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglUVBuffer);\n          state.enableAttribute(attributes.uv);\n          setVertexAttribute(attributes.uv, 2, _gl.FLOAT, false, 0, 0);\n\n        } else if (material.defaultAttributeValues) {\n\n\n          _gl.vertexAttrib2fv(attributes.uv, material.defaultAttributeValues.uv);\n\n        }\n\n      }\n\n      if (attributes.uv2 >= 0) {\n\n        if (object.geometry.faceVertexUvs[1]) {\n\n          _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglUV2Buffer);\n          state.enableAttribute(attributes.uv2);\n          setVertexAttribute(attributes.uv2, 2, _gl.FLOAT, false, 0, 0);\n\n        } else if (material.defaultAttributeValues) {\n\n\n          _gl.vertexAttrib2fv(attributes.uv2, material.defaultAttributeValues.uv2);\n\n        }\n\n      }\n\n      // line distances\n\n      if (attributes.lineDistance >= 0) {\n\n        _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglLineDistanceBuffer);\n        state.enableAttribute(attributes.lineDistance);\n        setVertexAttribute(attributes.lineDistance, 1, _gl.FLOAT, false, 0, 0);\n\n      }\n\n    }\n\n    state.disableUnusedAttributes();\n\n\n    // render mesh\n\n    if (object instanceof THREE.Mesh) {\n\n      var type = geometryGroup.__typeArray === Uint32Array ? _gl.UNSIGNED_INT : _gl.UNSIGNED_SHORT;\n\n      // wireframe\n\n      if (material.wireframe) {\n\n        state.setLineWidth(material.wireframeLinewidth * this.getPixelRatio());\n        if (updateBuffers) _gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER, geometryGroup.__webglLineBuffer);\n        _gl.drawElements(_gl.LINES, geometryGroup.__webglLineCount, type, 0);\n\n        // triangles\n\n      } else {\n\n        if (updateBuffers) _gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER, geometryGroup.__webglFaceBuffer);\n        _gl.drawElements(_gl.TRIANGLES, geometryGroup.__webglFaceCount, type, 0);\n\n      }\n\n      // render lines\n\n    } else if (object instanceof THREE.Line) {\n\n      var mode = object.mode === THREE.LineStrip ? _gl.LINE_STRIP : _gl.LINES;\n\n      state.setLineWidth(material.linewidth * this.getPixelRatio());\n\n      _gl.drawArrays(mode, 0, geometryGroup.__webglLineCount);\n\n      // render particles\n\n    } else if (object instanceof THREE.PointCloud) {\n\n      _gl.drawArrays(_gl.POINTS, 0, geometryGroup.__webglPointCount);\n\n    }\n  };\n\n\n  // Sorting\n\n  // This method is for transparency\n  function painterSortStable(a, b) {\n\n    // first see if there's a render order set - if so, this takes precedence\n    if (a.object.renderOrder !== b.object.renderOrder) {\n\n      return a.object.renderOrder - b.object.renderOrder;\n\n      // If render order are the same, then use z distance.\n      // We want to render from farthest to nearest.\n    } else if (a.z !== b.z) {\n\n      return a.z - b.z;\n\n      // if z distances match, then use id, for a consistent result\n    } else {\n\n      return a.id - b.id;\n\n    }\n\n  }\n\n  // This method is for opaque objects\n  function reversePainterSortStable(a, b) {\n\n    // first see if there's a render order set - if so, this takes precedence\n    if (a.object.renderOrder !== b.object.renderOrder) {\n\n      return a.object.renderOrder - b.object.renderOrder;\n\n      // Next, sort by material, for efficiency, to avoid state changes.\n      // (Note this is not done for transparency, as back to front order is more significant.)\n    } else if (a.material.id !== b.material.id) {\n\n      return a.material.id - b.material.id;\n\n      // If render order and material are the same, then use z distance.\n      // To minimize processing fragments, we render roughly from nearest to farthest.\n      // In this way, the closer objects cover pixels and so hide more distance objects.\n    }if (a.z !== b.z) {\n\n      return b.z - a.z;\n\n      // if z distances match, then use id, for a consistent sorted result\n    } else {\n\n      return a.id - b.id;\n\n    }\n\n  }\n\n  /* currently not used\n    function numericalSort ( a, b ) {\n         return b[ 0 ] - a[ 0 ];\n     }\n    */\n\n\n\n\n  // Rendering\n\n  this.render = function (scene, camera, renderTarget, forceClear, customLights) {\n\n    if (camera instanceof THREE.Camera === false) {\n\n      THREE.error('THREE.WebGLRenderer.render: camera is not an instance of THREE.Camera.');\n      return;\n\n    }\n\n    // reset caching for this frame\n\n    _currentGeometryProgram = '';\n    _currentMaterialId = -1;\n    _currentCamera = null;\n\n    if (customLights !== undefined) {\n      lights.length = 0;\n      _lightsNeedUpdate = true;\n    }\n\n    var fog = scene.fog;\n\n    // update scene graph\n\n    if (scene.autoUpdate === true) scene.updateMatrixWorld();\n\n    // update camera matrices and frustum\n\n    if (camera.parent === undefined) camera.updateMatrixWorld();\n\n    camera.matrixWorldInverse.getInverse(camera.matrixWorld);\n\n    if (camera.worldUpTransform)\n    _viewInverseEnv.multiplyMatrices(camera.worldUpTransform, camera.matrixWorld);else\n\n    _viewInverseEnv.copy(camera.matrixWorld);\n\n    _projScreenMatrix.multiplyMatrices(camera.projectionMatrix, camera.matrixWorldInverse);\n    _frustum.setFromMatrix(_projScreenMatrix);\n\n    // update WebGL objects\n    var renderImmediate = scene instanceof RenderBatch && scene.renderImmediate;\n\n    if (!renderImmediate) {\n      opaqueObjects.length = 0;\n      transparentObjects.length = 0;\n\n      projectObject(scene, _this.sortObjects === true, scene.forceVisible === true);\n\n      // note: the following flag is never set in WebGLRenderer; this may change in the future\n      if (_this.sortObjects === true) {\n        opaqueObjects.sort(reversePainterSortStable);\n        transparentObjects.sort(painterSortStable);\n      }\n    }\n\n    if (_lightsNeedUpdate) {\n      if (customLights && customLights.length)\n      lights = customLights.slice();\n      setupLights(lights);\n    }\n\n    //\n    this.setRenderTarget(renderTarget);\n\n    this.resetGLState();\n\n    if (this.autoClear || forceClear) {\n\n      this.clear(this.autoClearColor, this.autoClearDepth, this.autoClearStencil);\n\n    }\n\n    if (scene.overrideMaterial) {\n\n      var overrideMaterial = scene.overrideMaterial;\n\n      setMaterial(overrideMaterial);\n\n      if (!renderImmediate) {\n        renderObjects(opaqueObjects, camera, lights, fog, overrideMaterial);\n        renderObjects(transparentObjects, camera, lights, fog, overrideMaterial);\n      } else {\n        renderObjectsImmediate(scene, \"\", camera, lights, fog, overrideMaterial);\n      }\n\n    } else {\n\n      if (!renderImmediate) {\n        // opaque pass (front-to-back order)\n        state.setBlending(THREE.NoBlending);\n\n        renderObjects(opaqueObjects, camera, lights, fog, null);\n\n        // transparent pass (back-to-front order)\n\n        renderObjects(transparentObjects, camera, lights, fog, null);\n      } else {\n        renderObjectsImmediate(scene, \"\", camera, lights, fog, null);\n      }\n\n    }\n\n    if (scene.edgeMaterial) {\n\n      _gl.depthFunc(_gl.LESS); //hope to avoid some line-on-line overdraw this way\n\n      var _overrideMaterial = scene.edgeMaterial;\n\n      setMaterial(_overrideMaterial);\n\n      if (!renderImmediate) {\n        renderObjects(opaqueObjects, camera, lights, fog, _overrideMaterial);\n        renderObjects(transparentObjects, camera, lights, fog, _overrideMaterial);\n      } else {\n        renderObjectsImmediate(scene, \"\", camera, lights, fog, _overrideMaterial);\n      }\n\n      _gl.depthFunc(_gl.LEQUAL);\n\n    }\n\n\n    // Generate mipmap if we're using any kind of mipmap filtering\n    if (renderTarget && renderTarget.generateMipmaps && renderTarget.minFilter !== THREE.NearestFilter && renderTarget.minFilter !== THREE.LinearFilter) {\n\n      updateRenderTargetMipmap(renderTarget);\n\n    }\n\n    this.resetGLState();\n\n    // Ensure depth buffer writing is enabled so it can be cleared on next render\n\n    state.setDepthTest(true);\n    state.setDepthWrite(true);\n\n    // _gl.finish();\n\n  };\n\n  this.clearBlend = function () {\n    state.setBlending(THREE.NoBlending);\n  };\n\n  this.setProgramPrefix = function (index, vertexPrefix, fragmentPrefix) {\n    _programIndex = index;\n    _vertexPrefix = vertexPrefix;\n    _fragmentPrefix = fragmentPrefix;\n  };\n\n  this.getProgramPrefix = function () {\n    return { programPrefix: _programIndex,\n      vertexPrefix: _vertexPrefix,\n      fragmentPrefix: _fragmentPrefix };\n  };\n\n  this.updateTimestamp = function (highResTimeStamp) {\n    _highResTimeStamp = highResTimeStamp;\n  };\n\n  function renderBatchIterSort(m) {\n    projectObject(m, true);\n  }\n\n  function renderBatchIterNoSort(m) {\n    projectObject(m, false);\n  }\n\n  function projectObject(object, sortObjects, forceVisible) {\n\n    var i, len;\n\n    if (!forceVisible && object.visible === false)\n    return;\n\n    if (object instanceof THREE.Scene || object instanceof THREE.Group) {\n\n      // skip\n\n    } else if (object instanceof RenderBatch) {\n\n      object.forEach(sortObjects ? renderBatchIterSort : renderBatchIterNoSort);\n\n    } else {\n\n      initObject(object);\n\n      if (object instanceof THREE.Light) {\n\n        lights.push(object);\n\n      } else {\n\n        var webglObjects = _webglObjects[object.id];\n\n        if (webglObjects && (object.frustumCulled === false || _frustum.intersectsObject(object) === true)) {\n\n          for (i = 0, len = webglObjects.length; i < len; i++) {\n\n            var webglObject = webglObjects[i];\n\n            unrollBufferMaterial(webglObject);\n\n            webglObject.render = true;\n\n            if (sortObjects === true) {\n\n              _vector3.setFromMatrixPosition(object.matrixWorld);\n              _vector3.applyProjection(_projScreenMatrix);\n              webglObject.z = _vector3.z;\n\n            }\n\n          }\n\n        }\n\n      }\n\n    }\n\n    if (object.children) {\n\n      for (i = 0, len = object.children.length; i < len; i++) {\n\n        projectObject(object.children[i], sortObjects, forceVisible);\n\n      }\n\n    }\n\n  }\n\n  // depending on the original material of a shape, we use either the main\n  // override directly or a custom variant (if needed).\n  function chooseOverrideMaterial(shapeMaterial, overrideMaterial) {\n\n    // if override material does not define custom variants, there is nothing to do\n    if (!overrideMaterial.getCustomOverrideMaterial) {\n      return overrideMaterial;\n    }\n\n    // check if a custom override material should be used\n    var customOverride = overrideMaterial.getCustomOverrideMaterial(shapeMaterial);\n    if (!customOverride) {\n      return overrideMaterial;\n    }\n\n    // use alternative variant\n    return customOverride;\n  }\n\n  function renderObjects(renderList, camera, lights, fog, overrideMaterial) {\n\n    var material;\n\n    //TODO: we have to iterate upwards in order to preserve draw order for 2d\n    //without having to sort the scene. Figure out how to keep the reverse iteration so that\n    //we are consistent with three.js\n    for (var i = 0, iEnd = renderList.length; i < iEnd; i++) {\n      //for ( var i = renderList.length - 1; i !== - 1; i -- ) {\n\n      var webglObject = renderList[i];\n\n      var object = webglObject.object;\n      var buffer = webglObject.buffer;\n\n      if (overrideMaterial) {\n        // either use overrideMaterial or a custom variant if needed for this render item\n        material = chooseOverrideMaterial(webglObject.material, overrideMaterial);\n      } else {\n\n        material = webglObject.material;\n\n        if (!material) continue;\n\n        setMaterial(material);\n      }\n\n      // If the object is transparent, render it in two passes:\n      // backfaces, then frontfaces. This helps avoid out-of-order sorting\n      // transparency blending artifacts (these still can occur for pixels where\n      // four or more triangles in a single mesh overlap the same pixel).\n      // Also, check that depth testing is on; if not, we're in 2D mode and draw\n      // order matters so we should not use this mode.\n      // Else render normally.\n      // See https://jira.autodesk.com/browse/LMV-1121\n      if (material.twoPassTransparency)\n      {\n        var originalSide = material.side;\n        // note we do NOT set material.needsUpdate to true, as the double-sided shader\n        // works fine for back and front faces.\n        material.side = THREE.BackSide;\n        renderObjectsFace(material, camera, lights, fog, buffer, overrideMaterial, object);\n        material.side = THREE.FrontSide;\n        renderObjectsFace(material, camera, lights, fog, buffer, overrideMaterial, object);\n        material.side = originalSide;\n      } else\n\n      {\n        renderObjectsFace(material, camera, lights, fog, buffer, overrideMaterial, object);\n      }\n    }\n  }\n\n  function renderObjectsFace(material, camera, lights, fog, buffer, overrideMaterial, object)\n  {\n    _this.setMaterialFaces(material);\n\n    if (buffer instanceof THREE.BufferGeometry) {\n      _this.renderBufferDirect(camera, lights, fog, material, buffer, object);\n    } else {\n      _this.renderBuffer(camera, lights, fog, material, buffer, object);\n    }\n\n    if (material.decals) {\n      var decals = material.decals;\n      for (var di = 0, dlen = decals.length; di < dlen; di++) {\n        var decal = decals[di];\n        material = decal.material;\n        setMaterial(material);\n        _this.setMaterialFaces(material);\n        if (buffer instanceof THREE.BufferGeometry) {\n          _this.renderBufferDirect(camera, lights, fog, material, buffer, object, decal.uv);\n        }\n      }\n    }\n  }\n\n  var roi_camera, roi_lights, roi_fog, roi_overrideMaterial; // unused: roi_materialType,\n\n  function renderImmediateCallback(m, idx) {\n\n    if (m.visible && !m.hide) {\n      var material;\n\n      if (roi_overrideMaterial) {\n        // either use overrideMaterial or a custom variant if needed for this render item\n        material = chooseOverrideMaterial(m.material, roi_overrideMaterial);\n      } else {\n\n        material = m.material;\n\n        if (!material) return;\n\n        setMaterial(material);\n      }\n\n      // If the object is transparent, render it in two passes:\n      // backfaces, then frontfaces. This helps avoid out-of-order sorting\n      // transparency blending artifacts (these still can occur for pixels where\n      // four or more triangles in a single mesh overlap the same pixel).\n      // Also, check that depth testing is on; if not, we're in 2D mode and draw\n      // order matters so we should not use this mode.\n      // Else render normally.\n      // See https://jira.autodesk.com/browse/LMV-1121\n      if (material.twoPassTransparency)\n      {\n        var originalSide = material.side;\n        // note we do NOT set material.needsUpdate to true, as the double-sided shader\n        // works fine for back and front faces.\n        material.side = THREE.BackSide;\n        renderImmediateFace(m, material);\n        material.side = THREE.FrontSide;\n        renderImmediateFace(m, material);\n        material.side = originalSide;\n      } else\n\n      {\n        renderImmediateFace(m, material);\n      }\n    }\n  }\n\n  function renderImmediateFace(m, material)\n  {\n    _this.setMaterialFaces(material);\n    _this.renderBufferDirect(roi_camera, roi_lights, roi_fog, material, m.geometry, m);\n\n    if (material.decals) {\n      var decals = material.decals;\n      for (var di = 0, dlen = decals.length; di < dlen; di++) {\n        var decal = decals[di];\n        material = decal.material;\n        setMaterial(material);\n        _this.setMaterialFaces(material);\n        _this.renderBufferDirect(roi_camera, roi_lights, roi_fog, material, m.geometry, m, decal.uv);\n      }\n    }\n  }\n\n  function renderObjectsImmediate(renderList, materialType, camera, lights, fog, overrideMaterial) {\n\n    //roi_materialType = materialType;\n    roi_camera = camera;\n    roi_lights = lights;\n    roi_fog = fog;\n    roi_overrideMaterial = overrideMaterial || null;\n\n    // not really \"forceVisible\"\n    // it's really only for ground shadows, or custom modelQueue iteration passes\n    // In such cases we use the MESH_VISIBLE bit instead of the actual current visibility of the mesh (which is dependent on the render pass being done)\n    renderList.forEach(renderImmediateCallback, renderList.forceVisible ? 1 : 0x20 /* MESH_RENDERFLAG */, false);\n\n  }\n\n\n  function unrollBufferMaterial(globject) {\n\n    var object = globject.object;\n    var buffer = globject.buffer;\n\n    var geometry = object.geometry;\n    var material = object.material;\n\n    if (material instanceof THREE.MeshFaceMaterial) {\n\n      var materialIndex = geometry instanceof THREE.BufferGeometry ? 0 : buffer.materialIndex;\n\n      material = material.materials[materialIndex];\n\n      globject.material = material;\n\n      if (material.transparent) {\n\n        transparentObjects.push(globject);\n\n      } else {\n\n        opaqueObjects.push(globject);\n\n      }\n\n    } else if (material) {\n\n      globject.material = material;\n\n      if (material.transparent) {\n\n        transparentObjects.push(globject);\n\n      } else {\n\n        opaqueObjects.push(globject);\n\n      }\n\n    }\n\n  }\n\n\n\n  // Objects adding\n\n  function initObject(object) {\n\n    if (object.__webglInit === undefined) {\n\n      object.__webglInit = true;\n\n      object.addEventListener('removed', onObjectRemoved);\n\n    }\n\n    var geometry = object.geometry;\n\n    if (geometry === undefined) {\n\n      // ImmediateRenderObject\n\n    } else if (geometry.__webglInit === undefined) {\n\n      geometry.__webglInit = true;\n      geometry.addEventListener('dispose', onGeometryDispose);\n\n      if (geometry instanceof THREE.BufferGeometry) {\n\n        //\n\n      } else if (object instanceof THREE.Mesh) {\n\n        initGeometryGroups(object, geometry);\n\n      } else if (object instanceof THREE.Line) {\n\n        if (geometry.__webglVertexBuffer === undefined) {\n\n          createLineBuffers(geometry);\n          initLineBuffers(geometry, object);\n\n          geometry.verticesNeedUpdate = true;\n          geometry.colorsNeedUpdate = true;\n          geometry.lineDistancesNeedUpdate = true;\n\n        }\n      } else if (object instanceof THREE.PointCloud) {\n\n        if (geometry.__webglVertexBuffer === undefined) {\n\n          createPointCloudBuffers(geometry);\n          initPointCloudBuffers(geometry, object);\n\n          geometry.verticesNeedUpdate = true;\n          geometry.colorsNeedUpdate = true;\n        }\n\n      }\n\n    }\n\n    if (object.__webglActive === undefined) {\n\n      object.__webglActive = true;\n\n      if (object instanceof THREE.Mesh) {\n\n        if (geometry instanceof THREE.BufferGeometry) {\n\n          addBuffer(_webglObjects, geometry, object);\n\n        } else if (geometry instanceof THREE.Geometry) {\n\n          var geometryGroupsList = geometryGroups[geometry.id];\n\n          for (var i = 0, len = geometryGroupsList.length; i < len; i++) {\n\n            addBuffer(_webglObjects, geometryGroupsList[i], object);\n\n          }\n\n        }\n\n      } else if (object instanceof THREE.Line || object instanceof THREE.PointCloud) {\n\n        addBuffer(_webglObjects, geometry, object);\n\n      }\n\n    }\n\n  }\n\n\n  // Geometry splitting\n\n  var geometryGroups = {};\n  var geometryGroupCounter = 0;\n\n  function makeGroups(geometry, usesFaceMaterial) {\n\n    var maxVerticesInGroup = _isWebGL2 || extensions.get('OES_element_index_uint') ? 4294967296 : 65535;\n\n    var groupHash,hash_map = {};\n\n    var numMorphTargets = geometry.morphTargets ? geometry.morphTargets.length : 0;\n    var numMorphNormals = geometry.morphNormals ? geometry.morphNormals.length : 0;\n\n    var group;\n    var groups = {};\n    var groupsList = [];\n\n    for (var f = 0, fl = geometry.faces.length; f < fl; f++) {\n\n      var face = geometry.faces[f];\n      var materialIndex = usesFaceMaterial ? face.materialIndex : 0;\n\n      if (!(materialIndex in hash_map)) {\n\n        hash_map[materialIndex] = { hash: materialIndex, counter: 0 };\n\n      }\n\n      groupHash = hash_map[materialIndex].hash + '_' + hash_map[materialIndex].counter;\n\n      if (!(groupHash in groups)) {\n\n        group = {\n          id: geometryGroupCounter++,\n          faces3: [],\n          materialIndex: materialIndex,\n          vertices: 0,\n          numMorphTargets: numMorphTargets,\n          numMorphNormals: numMorphNormals };\n\n\n        groups[groupHash] = group;\n        groupsList.push(group);\n\n      }\n\n      if (groups[groupHash].vertices + 3 > maxVerticesInGroup) {\n\n        hash_map[materialIndex].counter += 1;\n        groupHash = hash_map[materialIndex].hash + '_' + hash_map[materialIndex].counter;\n\n        if (!(groupHash in groups)) {\n\n          group = {\n            id: geometryGroupCounter++,\n            faces3: [],\n            materialIndex: materialIndex,\n            vertices: 0,\n            numMorphTargets: numMorphTargets,\n            numMorphNormals: numMorphNormals };\n\n\n          groups[groupHash] = group;\n          groupsList.push(group);\n\n        }\n\n      }\n\n      groups[groupHash].faces3.push(f);\n      groups[groupHash].vertices += 3;\n\n    }\n\n    return groupsList;\n\n  }\n\n  function initGeometryGroups(object, geometry) {\n\n    var material = object.material,addBuffers = false;\n\n    if (geometryGroups[geometry.id] === undefined || geometry.groupsNeedUpdate === true) {\n\n      delete _webglObjects[object.id];\n\n      geometryGroups[geometry.id] = makeGroups(geometry, material instanceof THREE.MeshFaceMaterial);\n\n      geometry.groupsNeedUpdate = false;\n\n    }\n\n    var geometryGroupsList = geometryGroups[geometry.id];\n\n    // create separate VBOs per geometry chunk\n\n    for (var i = 0, il = geometryGroupsList.length; i < il; i++) {\n\n      var geometryGroup = geometryGroupsList[i];\n\n      // initialise VBO on the first access\n\n      if (geometryGroup.__webglVertexBuffer === undefined) {\n\n        createMeshBuffers(geometryGroup);\n        initMeshBuffers(geometryGroup, object);\n\n        geometry.verticesNeedUpdate = true;\n        geometry.morphTargetsNeedUpdate = true;\n        geometry.elementsNeedUpdate = true;\n        geometry.uvsNeedUpdate = true;\n        geometry.normalsNeedUpdate = true;\n        geometry.tangentsNeedUpdate = true;\n        geometry.colorsNeedUpdate = true;\n\n        addBuffers = true;\n\n      } else {\n\n        addBuffers = false;\n\n      }\n\n      if (addBuffers || object.__webglActive === undefined) {\n\n        addBuffer(_webglObjects, geometryGroup, object);\n\n      }\n\n    }\n\n    object.__webglActive = true;\n\n  }\n\n\n  function addBuffer(objlist, buffer, object) {\n\n    var id = object.id;\n    objlist[id] = objlist[id] || [];\n    objlist[id].push(\n    {\n      id: id,\n      buffer: buffer,\n      object: object,\n      material: null,\n      z: 0 });\n\n\n\n  }\n\n  // Objects updates\n\n  // Objects updates\n\n  function updateObject(object) {\n\n    var geometry = object.geometry,customAttributesDirty,material;\n\n    if (geometry instanceof THREE.BufferGeometry) {\n\n      setDirectBuffers(geometry);\n\n    } else if (object instanceof THREE.Mesh) {\n\n      // check all geometry groups\n\n      if (geometry.groupsNeedUpdate === true) {\n\n        initGeometryGroups(object, geometry);\n\n      }\n\n      var geometryGroupsList = geometryGroups[geometry.id];\n\n      for (var i = 0, il = geometryGroupsList.length; i < il; i++) {\n\n        var geometryGroup = geometryGroupsList[i];\n\n        material = getBufferMaterial(object, geometryGroup);\n\n        customAttributesDirty = material.attributes && areCustomAttributesDirty(material);\n\n        if (geometry.verticesNeedUpdate || geometry.morphTargetsNeedUpdate || geometry.elementsNeedUpdate ||\n        geometry.uvsNeedUpdate || geometry.normalsNeedUpdate ||\n        geometry.colorsNeedUpdate || geometry.tangentsNeedUpdate || customAttributesDirty) {\n\n          setMeshBuffers(geometryGroup, object, _gl.DYNAMIC_DRAW, !geometry.dynamic, material);\n\n        }\n\n      }\n\n      geometry.verticesNeedUpdate = false;\n      geometry.morphTargetsNeedUpdate = false;\n      geometry.elementsNeedUpdate = false;\n      geometry.uvsNeedUpdate = false;\n      geometry.normalsNeedUpdate = false;\n      geometry.colorsNeedUpdate = false;\n      geometry.tangentsNeedUpdate = false;\n\n      material.attributes && clearCustomAttributes(material);\n\n    } else if (object instanceof THREE.Line) {\n\n      material = getBufferMaterial(object, geometry);\n\n      customAttributesDirty = material.attributes && areCustomAttributesDirty(material);\n\n      if (geometry.verticesNeedUpdate || geometry.colorsNeedUpdate || geometry.lineDistancesNeedUpdate || customAttributesDirty) {\n\n        setLineBuffers(geometry, _gl.DYNAMIC_DRAW);\n\n      }\n\n      geometry.verticesNeedUpdate = false;\n      geometry.colorsNeedUpdate = false;\n      geometry.lineDistancesNeedUpdate = false;\n\n      material.attributes && clearCustomAttributes(material);\n\n    } else if (object instanceof THREE.PointCloud) {\n\n      material = getBufferMaterial(object, geometry);\n\n      customAttributesDirty = material.attributes && areCustomAttributesDirty(material);\n\n      if (geometry.verticesNeedUpdate || geometry.colorsNeedUpdate || customAttributesDirty) {\n\n        setPointCloudBuffers(geometry, _gl.DYNAMIC_DRAW);\n\n      }\n\n      geometry.verticesNeedUpdate = false;\n      geometry.colorsNeedUpdate = false;\n\n      material.attributes && clearCustomAttributes(material);\n    }\n\n  }\n\n  // Objects updates - custom attributes check\n\n  function areCustomAttributesDirty(material) {\n\n    for (var name in material.attributes) {\n\n      if (material.attributes[name].needsUpdate) return true;\n\n    }\n\n    return false;\n\n  }\n\n  function clearCustomAttributes(material) {\n\n    for (var name in material.attributes) {\n\n      material.attributes[name].needsUpdate = false;\n\n    }\n\n  }\n\n  // Objects removal\n\n  function removeObject(object) {\n\n    if (object instanceof THREE.Mesh ||\n    object instanceof THREE.PointCloud ||\n    object instanceof THREE.Line) {\n\n      delete _webglObjects[object.id];\n\n    }\n\n    delete object.__webglInit;\n    delete object.__webglActive;\n\n  }\n\n  // Materials\n\n  function getPrismClampFlags(parameters, material) {\n\n    if (!material.textureMaps)\n    return;\n\n    for (var i = 0; i < PrismMaps.length; i++) {\n\n      var name = PrismMaps[i];\n      // note this code keys off the fact that textures end with \"_map\";\n      // any new PRISM map materials should end with this suffix.\n      var map = material.textureMaps[name + \"_map\"];\n\n      if (!map)\n      continue;\n\n      var bools = map.textureObj.properties.booleans;\n\n      parameters[name] = {\n        S: !bools.texture_URepeat.values[0],\n        T: !bools.texture_VRepeat.values[0] };\n\n    }\n  }\n\n  var shaderIDs = {\n    MeshDepthMaterial: 'depth',\n    MeshNormalMaterial: 'normal',\n    MeshBasicMaterial: 'firefly_basic',\n    MeshLambertMaterial: 'lambert',\n    MeshPhongMaterial: 'firefly_phong',\n    LineBasicMaterial: 'firefly_basic',\n    LineDashedMaterial: 'dashed',\n    PointCloudMaterial: 'firefly_basic' };\n\n\n  function initMaterial(material, lights, fog, object) {\n\n    material.addEventListener('dispose', onMaterialDispose);\n\n    var shaderID = shaderIDs[material.type];\n\n    if (shaderID) {\n\n      var shader = THREE.ShaderLib[shaderID];\n\n      material.__webglShader = {\n        uniforms: THREE.UniformsUtils.clone(shader.uniforms),\n        vertexShader: shader.vertexShader,\n        fragmentShader: shader.fragmentShader };\n\n\n    } else {\n\n      material.__webglShader = {\n        uniforms: material.uniforms,\n        vertexShader: material.vertexShader,\n        fragmentShader: material.fragmentShader };\n\n    }\n\n    // heuristics to create shader parameters according to lights in the scene\n    // (not to blow over maxLights budget)\n\n    var maxLightCount = allocateLights(lights);\n\n    //var maxBones = 0;//allocateBones( object );\n\n    var parameters = {\n\n      precision: _precisionVertex,\n      precisionFragment: _precisionFragment,\n      supportsVertexTextures: _supportsVertexTextures,\n      haveTextureLod: _isWebGL2 || !!extensions.get(\"EXT_shader_texture_lod\"),\n      loadingAnimationDuration: _loadingAnimationDuration,\n\n      map: !!material.map,\n      envMap: !!material.envMap,\n      irradianceMap: !!material.irradianceMap,\n      envIsSpherical: material.envMap && material.envMap.mapping == THREE.SphericalReflectionMapping,\n      envGammaEncoded: material.envMap && material.envMap.GammaEncoded,\n      irrGammaEncoded: material.irradianceMap && material.irradianceMap.GammaEncoded,\n      envRGBM: material.envMap && material.envMap.RGBM,\n      irrRGBM: material.irradianceMap && material.irradianceMap.RGBM,\n      lightMap: !!material.lightMap,\n      bumpMap: (_isWebGL2 || extensions.get(\"OES_standard_derivatives\")) && !!material.bumpMap,\n      normalMap: (_isWebGL2 || extensions.get(\"OES_standard_derivatives\")) && !!material.normalMap,\n      specularMap: !!material.specularMap,\n      alphaMap: !!material.alphaMap,\n\n      vertexColors: material.vertexColors,\n      vertexIds: material.vertexIds,\n\n      useInstancing: material.useInstancing,\n\n      wideLines: material.wideLines,\n\n      fog: fog,\n      useFog: material.fog,\n      //fogExp: fog instanceof THREE.FogExp2,\n\n      sizeAttenuation: material.sizeAttenuation,\n\n      maxDirLights: maxLightCount.directional,\n      maxPointLights: maxLightCount.point,\n      maxSpotLights: maxLightCount.spot,\n      maxHemiLights: maxLightCount.hemi,\n\n      alphaTest: material.alphaTest,\n      metal: material.metal,\n      clearcoat: material.clearcoat,\n      wrapAround: material.wrapAround,\n      doubleSided: material.side === THREE.DoubleSide,\n      flipSided: material.side === THREE.BackSide,\n\n      mrtNormals: material.mrtNormals,\n      mrtIdBuffer: material.mrtIdBuffer,\n      vertexPrefix: _vertexPrefix,\n      fragmentPrefix: _fragmentPrefix,\n      tonemapOutput: material.tonemapOutput,\n      packedNormals: material.packedNormals,\n      hatchPattern: !!material.hatchParams,\n\n      // TODO_NOP should not be per mat\n      numCutplanes: material.cutplanes ? material.cutplanes.length : 0,\n\n      useTiling: material.useTiling,\n      tilingRepeatRange: material.useTiling && material.tilingRepeatRange,\n      hasRoundCorner: material.hasRoundCorner,\n      useRandomOffset: material.useRandomOffset,\n\n      // texture flags for clamp and invert for simple phong material\n      // add as wanted/necessary\n      mapInvert: material.map && material.map.invert,\n      mapClampS: material.map && material.map.clampS,\n      mapClampT: material.map && material.map.clampT,\n      bumpMapClampS: material.bumpMap && material.bumpMap.clampS,\n      bumpMapClampT: material.bumpMap && material.bumpMap.clampT,\n      normalMapClampS: material.normalMap && material.normalMap.clampS,\n      normalMapClampT: material.normalMap && material.normalMap.clampT,\n      specularMapClampS: material.specularMap && material.specularMap.clampS,\n      specularMapClampT: material.specularMap && material.specularMap.clampT,\n      alphaMapInvert: material.alphaMap && material.alphaMap.invert,\n      alphaMapClampS: material.alphaMap && material.alphaMap.clampS,\n      alphaMapClampT: material.alphaMap && material.alphaMap.clampT };\n\n\n\n    // texture flags for clamp for PRISM shader\n    if (material.isPrismMaterial) {\n      getPrismClampFlags(parameters, material);\n      parameters.isPrism = true;\n    }\n\n    var chunks = [];\n\n    if (shaderID) {\n\n      chunks.push(shaderID);\n\n    } else {\n\n      chunks.push(material.fragmentShader);\n      chunks.push(material.vertexShader);\n\n    }\n\n    //Append any custom defines to the shader cache key\n    for (var d in material.defines) {\n\n      chunks.push(d);\n      chunks.push(material.defines[d]);\n\n    }\n\n    var p, pl;\n    for (p in parameters) {\n\n      chunks.push(p);\n      chunks.push(parameters[p]);\n\n    }\n\n    var code = chunks.join();\n\n    var program;\n\n    // Check if code has been already compiled\n\n    for (p = 0, pl = _programs.length; p < pl; p++) {\n\n      var programInfo = _programs[p];\n\n      if (programInfo.code === code) {\n\n        program = programInfo;\n        program.usedTimes++;\n\n        break;\n\n      }\n\n    }\n\n    if (program === undefined) {\n\n      program = new WebGLProgram(_this, code, material, parameters);\n      _programs.push(program);\n\n      _this.info.memory.programs = _programs.length;\n\n    }\n\n    if (!material.programs)\n    material.programs = [];\n    material.programs[_programIndex] = program;\n\n\n    if (!material.uniformsLists)\n    material.uniformsLists = [];\n    material.uniformsList = material.uniformsLists[_programIndex] = [];\n\n    // to see which uniform name is at what location, uncomment\n    // let dump = true;\n    //if (dump) {\n    //    console.log(\"Uniform locations and names\");\n    //}\n    //let ic = 0;\n    for (var u in material.__webglShader.uniforms) {\n\n      var location = program.uniforms[u];\n\n      if (location) {\n        //if (dump) {\n        //    console.log(\"index: \" + (ic++) + \" has name: \" + u);\n        //}\n        material.uniformsList.push([material.__webglShader.uniforms[u], location]);\n      }\n\n    }\n\n  }\n\n  function setMaterial(material) {\n\n    if (material.transparent === true) {\n\n      state.setBlending(material.blending, material.blendEquation, material.blendSrc, material.blendDst, material.blendEquationAlpha, material.blendSrcAlpha, material.blendDstAlpha);\n\n    } else {\n\n      state.setBlending(THREE.NoBlending);\n\n    }\n\n    state.setDepthTest(material.depthTest);\n    state.setDepthWrite(material.depthWrite);\n    state.setPolygonOffset(material.polygonOffset, material.polygonOffsetFactor, material.polygonOffsetUnits);\n\n  }\n\n\n  function setProgram(camera, lights, fog, material, object) {\n\n    _usedTextureUnits = 0;\n\n    if (material.needsUpdate) {\n\n      if (material.program) deallocateMaterial(material);\n\n      initMaterial(material, lights, fog, object);\n      material.needsUpdate = false;\n\n    } else if (!material.programs[_programIndex])\n    initMaterial(material, lights, fog, object);\n\n\n    var refreshProgram = false;\n    var refreshMaterial = false;\n    var refreshLights = false;\n\n    material.uniformsList = material.uniformsLists[_programIndex];\n    var program = material.program = material.programs[_programIndex],\n    p_uniforms = program.uniforms,\n    m_uniforms = material.__webglShader.uniforms;\n\n    if (program.id !== _currentProgram) {\n\n      _gl.useProgram(program.program);\n      _currentProgram = program.id;\n\n      refreshProgram = true;\n      refreshMaterial = true;\n      refreshLights = true;\n\n    }\n\n    if (material.id !== _currentMaterialId) {\n\n      if (_currentMaterialId === -1) refreshLights = true;\n      _currentMaterialId = material.id;\n\n      refreshMaterial = true;\n\n    }\n\n    if (p_uniforms.meshAnimTime) {\n      var meshAnimTime = 1.0; // In case no creationTime value is found, keep it 1.0, so it won't have animation.\n\n      if (object.geometry.creationTime && _loadingAnimationDuration > 0) {\n        meshAnimTime = Math.min((_highResTimeStamp - object.geometry.creationTime) / _loadingAnimationDuration, 1.0);\n      }\n\n      _gl.uniform1f(p_uniforms.meshAnimTime, meshAnimTime);\n    }\n\n    if (refreshProgram || camera !== _currentCamera) {\n\n      _gl.uniformMatrix4fv(p_uniforms.projectionMatrix, false, camera.projectionMatrix.elements);\n\n      if (camera !== _currentCamera) _currentCamera = camera;\n\n\n      // load material specific uniforms\n      // (shader material also gets them for the sake of genericity)\n\n      if (material instanceof THREE.ShaderMaterial ||\n      material instanceof THREE.MeshPhongMaterial ||\n      material.isPrismMaterial ||\n      material.envMap) {\n\n        if (p_uniforms.cameraPosition !== null) {\n\n          _vector3.setFromMatrixPosition(camera.matrixWorld);\n          _gl.uniform3f(p_uniforms.cameraPosition, _vector3.x, _vector3.y, _vector3.z);\n\n        }\n\n      }\n\n      if (material instanceof THREE.MeshPhongMaterial ||\n      material instanceof THREE.MeshLambertMaterial ||\n      material instanceof THREE.ShaderMaterial ||\n      material.isPrismMaterial ||\n      material.skinning) {\n\n        if (p_uniforms.viewMatrix !== null) {\n\n          _gl.uniformMatrix4fv(p_uniforms.viewMatrix, false, camera.matrixWorldInverse.elements);\n\n        }\n\n        //NOTE: viewMatrixInverse is only used for transforming normal vectors\n        //for sampling environment textures. This is why we do not use camera.matrixWorld here,\n        //but a combination of camera.matrixWorld plus a rotation to make Y the up vector, so that\n        //the top of the scene (whichever axis is up) results in sampling the top of the environment map.\n        //If viewMatrixInverse is needed for other things in the shader, then we will need a second\n        //uniform that does not include the world-up rotation, or apply a consistent world up rotation\n        //to all geometries in the scene.\n        if (p_uniforms.viewMatrixInverse !== null) {\n\n          _gl.uniformMatrix4fv(p_uniforms.viewMatrixInverse, false, _viewInverseEnv.elements);\n\n        }\n\n        if (p_uniforms.mvpMatrix) {\n\n          _gl.uniformMatrix4fv(p_uniforms.mvpMatrix, false, _projScreenMatrix.elements);\n\n        }\n\n        if (refreshLights) {\n          refreshUniformsIBL(m_uniforms, material);\n          markUniformsIBLNeedsUpdate(m_uniforms, true);\n        } else {\n          markUniformsIBLNeedsUpdate(m_uniforms, false);\n        }\n\n      }\n\n    }\n\n    //For some reason this needs to happen here, before refreshMaterial,\n    //in order to use a good texture slot for the tIdColor texture. If it happens\n    //after the dbId uniform handling below, rendering becomes terribly slow.\n    if (p_uniforms.unpackXform) {\n      var g = object.geometry;\n      var t = g.unpackXform;\n      if (t)\n      _gl.uniform4f(p_uniforms.unpackXform, t.x, t.y, t.z, t.w);else\n\n      _gl.uniform4f(p_uniforms.unpackXform, 1, 1, 0, 0);\n\n      if (p_uniforms.tIdColor) {\n        _gl.uniform2f(p_uniforms.vIdColorTexSize, g.vIdColorTexSize.x, g.vIdColorTexSize.y);\n\n        var unit = getTextureUnit();\n        _gl.uniform1i(p_uniforms.tIdColor, unit);\n        _this.setTexture(g.tIdColor, unit);\n      }\n\n    }\n\n\n    if (refreshMaterial) {\n\n      // refresh uniforms common to several materials\n\n      if (material instanceof THREE.MeshPhongMaterial ||\n      material instanceof THREE.MeshLambertMaterial ||\n      material.isPrismMaterial ||\n      material.lights) {\n\n        if (_lightsNeedUpdate) {\n\n          refreshLights = true;\n          setupLights(lights);\n          _lightsNeedUpdate = false;\n\n        }\n\n        if (refreshLights) {\n          refreshUniformsLights(m_uniforms, _lights);\n          markUniformsLightsNeedsUpdate(m_uniforms, true);\n        } else {\n          markUniformsLightsNeedsUpdate(m_uniforms, false);\n        }\n\n      }\n\n      if (material instanceof THREE.MeshBasicMaterial ||\n      material instanceof THREE.MeshLambertMaterial ||\n      material instanceof THREE.MeshPhongMaterial) {\n\n        refreshUniformsCommon(m_uniforms, material);\n        refreshUniformsIBL(m_uniforms, material);\n      }\n\n      // refresh single material specific uniforms\n\n      if (material instanceof THREE.PointCloudMaterial) {\n\n        refreshUniformsPointCloud(m_uniforms, material);\n\n      } else if (material instanceof THREE.LineBasicMaterial) {\n\n        refreshUniformsLine(m_uniforms, material);\n\n      } else if (material instanceof THREE.LineDashedMaterial) {\n\n        refreshUniformsLine(m_uniforms, material);\n        refreshUniformsDash(m_uniforms, material);\n\n      } else if (material instanceof THREE.MeshPhongMaterial) {\n\n        refreshUniformsPhong(m_uniforms, material);\n\n      } else if (material instanceof THREE.MeshLambertMaterial) {\n\n        refreshUniformsLambert(m_uniforms, material);\n\n      } else if (material instanceof THREE.MeshDepthMaterial) {\n\n        m_uniforms.mNear.value = camera.near;\n        m_uniforms.mFar.value = camera.far;\n        m_uniforms.opacity.value = material.opacity;\n\n      } else if (material instanceof THREE.MeshNormalMaterial) {\n\n        m_uniforms.opacity.value = material.opacity;\n\n      } else if (material.isPrismMaterial) {\n\n        refreshUniformsPrism(m_uniforms, material);\n        refreshUniformsIBL(m_uniforms, material);\n\n      } else if (typeof material.refreshUniforms === 'function') {\n        material.refreshUniforms(m_uniforms);\n\n      }\n      if (material.wideLines) {\n        var width = object.geometry.lineWidth;\n        if (material.linewidth !== undefined)\n        width = material.linewidth;\n        m_uniforms.view_size.value = new THREE.Vector2(_window.innerWidth / width, _window.innerHeight / width);\n      }\n\n      if (shadowmap.ShadowRender && material.shadowMap) {\n        shadowmap.ShadowRender.RefreshUniformsShadow(m_uniforms, material);\n      }\n\n      // TODO_NOP: direct assignment dangerous?\n      var ucp = m_uniforms.cutplanes;\n      if (material.cutplanes && material.cutplanes.length > 0 && ucp) {\n        ucp.value = material.cutplanes;\n        // Currently, Prism is implemented as shader material, its uniform is just init for once.\n        // Remove the array component if cutplanes's length changed so it can be re-init.\n        if (ucp._array && ucp._array.length != 4 * material.cutplanes)\n        ucp._array = undefined;\n      }\n\n      if (material.hatchParams && m_uniforms.hatchParams) {\n        m_uniforms.hatchParams.value.copy(material.hatchParams);\n        m_uniforms.hatchTintColor.value.copy(material.hatchTintColor);\n        m_uniforms.hatchTintIntensity.value = material.hatchTintIntensity;\n      }\n\n      // load common uniforms\n\n      loadUniformsGeneric(material.uniformsList);\n\n    }\n\n    loadUniformsMatrices(p_uniforms, object, camera);\n\n    var dbId;\n    if (p_uniforms.modelId) {\n\n      if (p_uniforms.dbId) {\n        dbId = object.dbId || object.fragId || 0;\n        _gl.uniform3f(p_uniforms.dbId, (dbId & 0xff) / 255,\n        (dbId >> 8 & 0xff) / 255,\n        (dbId >> 16 & 0xff) / 255);\n      }\n      var modelId = object.modelId;\n      _gl.uniform3f(p_uniforms.modelId, (modelId & 0xff) / 255,\n      (modelId >> 8 & 0xff) / 255,\n      //we can encode the highest bits of the ID here, since the model ID will not really need more than 2 bytes\n      (dbId >> 24 & 0xff) / 255);\n\n    } else if (p_uniforms.dbId !== null) {\n\n      dbId = object.dbId || object.fragId || 0;\n\n      //The dbId is rendered to an RGB target, so the\n      //uppermost byte of the dbId is dropped. Use a modelId\n      //target if the full range is desired\n      _gl.uniform3f(p_uniforms.dbId, (dbId & 0xff) / 255,\n      (dbId >> 8 & 0xff) / 255,\n      (dbId >> 16 & 0xff) / 255 /*,\n                                ((dbId >> 24) & 0xff) / 255*/);\n\n    }\n\n    // If a theming color uniform is defined, get it from the mesh.\n    // Note that theming colors are Vector4 (not THREE.Color), because we need alpha for intensity.\n    if (p_uniforms.themingColor) {\n      var color = object.themingColor;\n      if (color instanceof THREE.Vector4) {\n        _gl.uniform4f(p_uniforms.themingColor, color.x, color.y, color.z, color.w);\n      } else {\n        _gl.uniform4f(p_uniforms.themingColor, 0.0, 0.0, 0.0, 0.0);\n      }\n    }\n\n    return program;\n\n  }\n\n  // Uniforms (refresh uniforms objects)\n\n  function refreshUniformsCommon(uniforms, material) {\n\n    uniforms.opacity.value = material.opacity;\n\n\n    uniforms.diffuse.value.copy(material.color);\n\n\n    uniforms.map.value = material.map;\n    uniforms.lightMap.value = material.lightMap;\n    uniforms.specularMap.value = material.specularMap;\n    uniforms.alphaMap.value = material.alphaMap;\n\n    if (material.bumpMap) {\n\n      uniforms.bumpMap.value = material.bumpMap;\n      uniforms.bumpScale.value = material.bumpScale;\n\n    }\n\n    if (material.normalMap) {\n\n      uniforms.normalMap.value = material.normalMap;\n      uniforms.normalScale.value.copy(material.normalScale);\n\n    }\n\n    // uv repeat and offset setting priorities\n    //\t1. color map\n    //\t2. specular map\n    //\t3. normal map\n    //\t4. bump map\n    //  5. alpha map\n\n    //NOTE: We deviate from Three.js in that we allow\n    //separate scales for diffuse/specular, alpha, and bump\n\n    function setTexTransforms(uniforms, texMatrix, texture) {\n      var offset = texture.offset;\n      var repeat = texture.repeat;\n\n      if (texMatrix) {\n        var uMatrix = texMatrix.value;\n\n        if (texture.matrix)\n        uMatrix.copy(texture.matrix);else\n\n        uMatrix.identity();\n\n        uMatrix.elements[6] += offset.x;\n        uMatrix.elements[7] += offset.y;\n        uMatrix.elements[0] *= repeat.x;\n        uMatrix.elements[3] *= repeat.x;\n        uMatrix.elements[1] *= repeat.y;\n        uMatrix.elements[4] *= repeat.y;\n      } else\n      {\n        uniforms.offsetRepeat.value.set(offset.x, offset.y, repeat.x, repeat.y);\n      }\n    }\n\n    if (material.alphaMap) {\n      setTexTransforms(uniforms, uniforms.texMatrixAlpha, material.alphaMap);\n    }\n\n    var uvScaleMapBump;\n    if (material.normalMap) {\n      uvScaleMapBump = material.normalMap;\n    } else if (material.bumpMap) {\n      uvScaleMapBump = material.bumpMap;\n    }\n    if (uvScaleMapBump !== undefined) {\n      setTexTransforms(uniforms, uniforms.texMatrixBump, uvScaleMapBump);\n    }\n\n    var uvScaleMap;\n    if (material.map) {\n      uvScaleMap = material.map;\n    } else if (material.specularMap) {\n      uvScaleMap = material.specularMap;\n    }\n    if (uvScaleMap !== undefined) {\n      setTexTransforms(uniforms, uniforms.texMatrix, uvScaleMap);\n    }\n\n    uniforms.envMap.value = material.envMap;\n    //uniforms.flipEnvMap.value = ( material.envMap instanceof THREE.WebGLRenderTargetCube ) ? 1 : -1;\n    if (uniforms.irradianceMap) {\n      uniforms.irradianceMap.value = material.irradianceMap;\n    }\n\n    uniforms.reflectivity.value = material.reflectivity;\n\n\n    uniforms.refractionRatio.value = material.refractionRatio;\n\n  }\n\n  function refreshUniformsPointCloud(uniforms, material) {\n\n    refreshUniformsLine(uniforms, material);\n    uniforms.point_size.value = material.size;\n    uniforms.map.value = material.map;\n  }\n\n  function refreshUniformsLine(uniforms, material) {\n\n    uniforms.diffuse.value = material.color;\n    uniforms.opacity.value = material.opacity;\n\n  }\n\n  function refreshUniformsDash(uniforms, material) {\n\n    uniforms.dashSize.value = material.dashSize;\n    uniforms.totalSize.value = material.dashSize + material.gapSize;\n    uniforms.scale.value = material.scale;\n\n  }\n\n  function refreshUniformsIBL(uniforms, material) {\n    if (uniforms.envMap)\n    uniforms.envMap.value = material.envMap;\n    //uniforms.flipEnvMap.value = ( material.envMap instanceof THREE.WebGLRenderTargetCube ) ? 1 : -1;\n    if (uniforms.irradianceMap)\n    uniforms.irradianceMap.value = material.irradianceMap;\n    if (uniforms.envMapExposure)\n    uniforms.envMapExposure.value = material.envMapExposure;\n    if (uniforms.envRotationSin && uniforms.envRotationCos) {\n      uniforms.envRotationSin.value = material.envRotationSin;\n      uniforms.envRotationCos.value = material.envRotationCos;\n    }\n  }\n\n  function markUniformsIBLNeedsUpdate(uniforms, boolean) {\n\n    if (uniforms.envMap)\n    uniforms.envMap.needsUpdate = boolean;\n    //uniforms.flipEnvMap.value = ( material.envMap instanceof THREE.WebGLRenderTargetCube ) ? 1 : -1;\n    if (uniforms.irradianceMap)\n    uniforms.irradianceMap.needsUpdate = boolean;\n    if (uniforms.envMapExposure)\n    uniforms.envMapExposure.needsUpdate = boolean;\n  }\n\n\n  function refreshUniformsPhong(uniforms, material) {\n\n    uniforms.shininess.value = material.shininess;\n\n    //The environment cube map is blurred with the assumption that\n    //max shininess is 2048 and every mip drops that by a factor of 4\n    //\"float MipmapIndex = log(shininess / 2048.0) / log(0.25);\",\n    //The simplification below was given in the original source for this method.\n    //However, it does not seem to match the equation above, so we use a corrected one.\n    //\"float MipmapIndex = max(0.0, -1.66096404744368 * logShiny + 5.5);\",\n    //NOTE: Once roughness maps are supported, the computation will have to move to the shader.\n    if (uniforms.reflMipIndex) {\n      var logShiny = Math.log(Math.max(1.0 + 1e-10, material.shininess));\n      uniforms.reflMipIndex.value = Math.max(0.0, -0.72134752 * logShiny + 5.5);\n    }\n\n    if (uniforms.emissive)\n    uniforms.emissive.value.copy(material.emissive);\n\n    uniforms.specular.value.copy(material.specular);\n\n    //Not used by LMV\n    /*\n    if ( material.wrapAround ) {\n         uniforms.wrapRGB.value.copy( material.wrapRGB );\n     }\n    */\n\n\n\n    if (uniforms.exposureBias)\n    uniforms.exposureBias.value = material.exposureBias;\n  }\n\n  function refreshUniformsPrism(uniforms, material) {\n\n    function refreshPrismMapUniforms(uniforms, material, mapName) {\n      uniforms[mapName].value = material[mapName];\n      // yes, we want \"!=\" here, not \"!==\", as we test for both undefined and null\n      if (material[mapName] != null)\n      {\n        uniforms[mapName + \"_texMatrix\"].value = material[mapName].matrix;\n        uniforms[mapName + \"_invert\"].value = material[mapName].invert;\n      }\n    }\n\n    function refreshPrismBumpMapUniforms(uniforms, material, mapName) {\n      uniforms[mapName].value = material[mapName];\n      // yes, we want \"!=\" here, not \"!==\", as we test for both undefined and null\n      if (material[mapName] != null)\n      {\n        uniforms[mapName + \"_texMatrix\"].value = material[mapName].matrix;\n        uniforms[mapName + \"_bumpScale\"].value = material[mapName].bumpScale;\n        uniforms[mapName + \"_bumpmapType\"].value = material[mapName].bumpmapType;\n      }\n    }\n\n    uniforms.exposureBias.value = material.exposureBias;\n    uniforms.opacity.value = material.opacity;\n\n    //Prism common properties.\n    uniforms.surface_albedo.value = material.surface_albedo;\n    uniforms.surface_roughness.value = material.surface_roughness;\n    uniforms.surface_anisotropy.value = material.surface_anisotropy;\n    uniforms.surface_rotation.value = material.surface_rotation;\n\n    refreshPrismMapUniforms(uniforms, material, \"surface_albedo_map\");\n    refreshPrismMapUniforms(uniforms, material, \"surface_roughness_map\");\n    refreshPrismMapUniforms(uniforms, material, \"surface_cutout_map\");\n    refreshPrismMapUniforms(uniforms, material, \"surface_anisotropy_map\");\n    refreshPrismMapUniforms(uniforms, material, \"surface_rotation_map\");\n\n    refreshPrismBumpMapUniforms(uniforms, material, \"surface_normal_map\");\n\n    //Update Prism properties according to the material type.\n    switch (material.prismType) {\n      case 'PrismOpaque':\n        uniforms.opaque_albedo.value = material.opaque_albedo;\n        uniforms.opaque_luminance_modifier.value = material.opaque_luminance_modifier;\n        uniforms.opaque_f0.value = material.opaque_f0;\n        uniforms.opaque_luminance.value = material.opaque_luminance;\n\n        refreshPrismMapUniforms(uniforms, material, \"opaque_albedo_map\");\n        refreshPrismMapUniforms(uniforms, material, \"opaque_luminance_modifier_map\");\n        refreshPrismMapUniforms(uniforms, material, \"opaque_f0_map\");\n\n        break;\n\n      case 'PrismMetal':\n        uniforms.metal_f0.value = material.metal_f0;\n\n        refreshPrismMapUniforms(uniforms, material, \"metal_f0_map\");\n\n        break;\n\n      case 'PrismLayered':\n        uniforms.layered_f0.value = material.layered_f0;\n        uniforms.layered_diffuse.value = material.layered_diffuse;\n        uniforms.layered_fraction.value = material.layered_fraction;\n        uniforms.layered_bottom_f0.value = material.layered_bottom_f0;\n        uniforms.layered_roughness.value = material.layered_roughness;\n        uniforms.layered_anisotropy.value = material.layered_anisotropy;\n        uniforms.layered_rotation.value = material.layered_rotation;\n\n        refreshPrismMapUniforms(uniforms, material, \"layered_bottom_f0_map\");\n        refreshPrismMapUniforms(uniforms, material, \"layered_f0_map\");\n        refreshPrismMapUniforms(uniforms, material, \"layered_diffuse_map\");\n        refreshPrismMapUniforms(uniforms, material, \"layered_fraction_map\");\n        refreshPrismMapUniforms(uniforms, material, \"layered_roughness_map\");\n        refreshPrismMapUniforms(uniforms, material, \"layered_anisotropy_map\");\n        refreshPrismMapUniforms(uniforms, material, \"layered_rotation_map\");\n\n        refreshPrismBumpMapUniforms(uniforms, material, \"layered_normal_map\");\n\n        break;\n\n      case 'PrismTransparent':\n        uniforms.transparent_color.value = material.transparent_color;\n        uniforms.transparent_distance.value = material.transparent_distance;\n        uniforms.transparent_ior.value = material.transparent_ior;\n\n        break;\n\n      case 'PrismGlazing':\n        uniforms.glazing_f0.value = material.glazing_f0;\n        uniforms.glazing_transmission_color.value = material.glazing_transmission_color;\n        uniforms.glazing_transmission_roughness.value = material.glazing_transmission_roughness;\n\n        refreshPrismMapUniforms(uniforms, material, \"glazing_f0_map\");\n        refreshPrismMapUniforms(uniforms, material, \"glazing_transmission_color_map\");\n        refreshPrismMapUniforms(uniforms, material, \"glazing_transmission_roughness_map\");\n\n        break;\n\n      case 'PrismWood':\n        uniforms.wood_fiber_cosine_enable.value = material.wood_fiber_cosine_enable;\n        uniforms.wood_fiber_cosine_bands.value = material.wood_fiber_cosine_bands;\n        uniforms.wood_fiber_cosine_weights.value = material.wood_fiber_cosine_weights;\n        uniforms.wood_fiber_cosine_frequencies.value = material.wood_fiber_cosine_frequencies;\n\n        uniforms.wood_fiber_perlin_enable.value = material.wood_fiber_perlin_enable;\n        uniforms.wood_fiber_perlin_bands.value = material.wood_fiber_perlin_bands;\n        uniforms.wood_fiber_perlin_weights.value = material.wood_fiber_perlin_weights;\n        uniforms.wood_fiber_perlin_frequencies.value = material.wood_fiber_perlin_frequencies;\n        uniforms.wood_fiber_perlin_scale_z.value = material.wood_fiber_perlin_scale_z;\n\n        uniforms.wood_growth_perlin_enable.value = material.wood_growth_perlin_enable;\n        uniforms.wood_growth_perlin_bands.value = material.wood_growth_perlin_bands;\n        uniforms.wood_growth_perlin_weights.value = material.wood_growth_perlin_weights;\n        uniforms.wood_growth_perlin_frequencies.value = material.wood_growth_perlin_frequencies;\n\n        uniforms.wood_latewood_ratio.value = material.wood_latewood_ratio;\n        uniforms.wood_earlywood_sharpness.value = material.wood_earlywood_sharpness;\n        uniforms.wood_latewood_sharpness.value = material.wood_latewood_sharpness;\n        uniforms.wood_ring_thickness.value = material.wood_ring_thickness;\n\n        uniforms.wood_earlycolor_perlin_enable.value = material.wood_earlycolor_perlin_enable;\n        uniforms.wood_earlycolor_perlin_bands.value = material.wood_earlycolor_perlin_bands;\n        uniforms.wood_earlycolor_perlin_weights.value = material.wood_earlycolor_perlin_weights;\n        uniforms.wood_earlycolor_perlin_frequencies.value = material.wood_earlycolor_perlin_frequencies;\n        uniforms.wood_early_color.value = material.wood_early_color;\n\n        uniforms.wood_use_manual_late_color.value = material.wood_use_manual_late_color;\n        uniforms.wood_manual_late_color.value = material.wood_manual_late_color;\n\n        uniforms.wood_latecolor_perlin_enable.value = material.wood_latecolor_perlin_enable;\n        uniforms.wood_latecolor_perlin_bands.value = material.wood_latecolor_perlin_bands;\n        uniforms.wood_latecolor_perlin_weights.value = material.wood_latecolor_perlin_weights;\n        uniforms.wood_latecolor_perlin_frequencies.value = material.wood_latecolor_perlin_frequencies;\n        uniforms.wood_late_color_power.value = material.wood_late_color_power;\n\n        uniforms.wood_diffuse_perlin_enable.value = material.wood_diffuse_perlin_enable;\n        uniforms.wood_diffuse_perlin_bands.value = material.wood_diffuse_perlin_bands;\n        uniforms.wood_diffuse_perlin_weights.value = material.wood_diffuse_perlin_weights;\n        uniforms.wood_diffuse_perlin_frequencies.value = material.wood_diffuse_perlin_frequencies;\n        uniforms.wood_diffuse_perlin_scale_z.value = material.wood_diffuse_perlin_scale_z;\n\n        uniforms.wood_use_pores.value = material.wood_use_pores;\n        uniforms.wood_pore_type.value = material.wood_pore_type;\n        uniforms.wood_pore_radius.value = material.wood_pore_radius;\n        uniforms.wood_pore_cell_dim.value = material.wood_pore_cell_dim;\n        uniforms.wood_pore_color_power.value = material.wood_pore_color_power;\n        uniforms.wood_pore_depth.value = material.wood_pore_depth;\n\n        uniforms.wood_use_rays.value = material.wood_use_rays;\n        uniforms.wood_ray_color_power.value = material.wood_ray_color_power;\n        uniforms.wood_ray_seg_length_z.value = material.wood_ray_seg_length_z;\n        uniforms.wood_ray_num_slices.value = material.wood_ray_num_slices;\n        uniforms.wood_ray_ellipse_z2x.value = material.wood_ray_ellipse_z2x;\n        uniforms.wood_ray_ellipse_radius_x.value = material.wood_ray_ellipse_radius_x;\n\n        uniforms.wood_use_latewood_bump.value = material.wood_use_latewood_bump;\n        uniforms.wood_latewood_bump_depth.value = material.wood_latewood_bump_depth;\n\n        uniforms.wood_use_groove_roughness.value = material.wood_use_groove_roughness;\n        uniforms.wood_groove_roughness.value = material.wood_groove_roughness;\n        uniforms.wood_diffuse_lobe_weight.value = material.wood_diffuse_lobe_weight;\n\n        refreshPrismMapUniforms(uniforms, material, \"wood_curly_distortion_map\");\n        if (uniforms[\"wood_curly_distortion_map\"].value != null)\n        {\n          // This map constains tree space position offsets\n          uniforms[\"wood_curly_distortion_map\"].value.minFilter = THREE.NearestFilter;\n          uniforms[\"wood_curly_distortion_map\"].value.magFilter = THREE.NearestFilter;\n          uniforms.wood_curly_distortion_enable.value = material.wood_curly_distortion_enable;\n          uniforms.wood_curly_distortion_scale.value = material.wood_curly_distortion_scale;\n        }\n\n        var earlyWood = 1.0 - material.wood_latewood_ratio;\n        var earlyWoodSharpness = material.wood_earlywood_sharpness * earlyWood;\n        var lateWoodSharpness = material.wood_latewood_sharpness * material.wood_latewood_ratio;\n        var riseStart = earlyWood + lateWoodSharpness;\n        uniforms.wood_ring_fraction.value = new THREE.Vector4(earlyWood, earlyWoodSharpness, lateWoodSharpness, riseStart);\n        uniforms.wood_fall_rise.value = new THREE.Vector2(earlyWood - earlyWoodSharpness, material.wood_latewood_ratio - lateWoodSharpness);\n\n        break;\n\n      default:\n        THREE.warn('Unknown prism type: ' + material.prismType);}\n\n\n    if (material.useTiling) {\n      uniforms.tilingOverallTransform.value = material.tilingOverallTransform;\n      uniforms.TilingMap.value = material.TilingMap;\n      uniforms.TilingMap_texMatrix.value = material.TilingMap_texMatrix;\n      if (material.hasRoundCorner) {\n        uniforms.TilingNormalMap.value = material.TilingNormalMap;\n        uniforms.TilingNormalMap_texMatrix.value = material.TilingNormalMap_texMatrix;\n      }\n      if (material.useRandomOffset) {\n        uniforms.TilingRandomMap.value = material.TilingRandomMap;\n        uniforms.TilingRandomMap_texMatrix.value = material.TilingRandomMap_texMatrix;\n        uniforms.tilingRandomAxisS.value = material.tilingRandomAxisS;\n        uniforms.tilingRandomAxisT.value = material.tilingRandomAxisT;\n        uniforms.tilingRandomAlignmentOffset.value = material.tilingRandomAlignmentOffset;\n      }\n      // note there is no \"invert\" property that gets set on the tiling MSDF texture, as it makes little sense\n      uniforms.uv2tile.value = material.uv2tile;\n      uniforms.tile2uv.value = material.tile2uv;\n      // not needed here, as these are built in to the shader loops, due to WebGL needing fixed values for loops.\n      //uniforms.tilingRepeatRange.value = material.tilingRepeatRange;\n      uniforms.tileAlignOffset.value = material.tileAlignOffset;\n      uniforms.tilingUVTransform.value = material.tilingUVTransform;\n    }\n\n    uniforms.envExponentMin.value = material.envExponentMin;\n    uniforms.envExponentMax.value = material.envExponentMax;\n    uniforms.envExponentCount.value = material.envExponentCount;\n  }\n\n  function refreshUniformsLambert(uniforms, material) {\n\n    uniforms.emissive.value.copy(material.emissive);\n\n\n    if (material.wrapAround) {\n\n      uniforms.wrapRGB.value.copy(material.wrapRGB);\n\n    }\n\n  }\n\n  function refreshUniformsLights(uniforms, lights) {\n\n    uniforms.ambientLightColor.value = lights.ambient;\n\n    uniforms.directionalLightColor.value = lights.directional.colors;\n    uniforms.directionalLightDirection.value = lights.directional.positions;\n\n    uniforms.pointLightColor.value = lights.point.colors;\n    uniforms.pointLightPosition.value = lights.point.positions;\n    uniforms.pointLightDistance.value = lights.point.distances;\n\n    uniforms.spotLightColor.value = lights.spot.colors;\n    uniforms.spotLightPosition.value = lights.spot.positions;\n    uniforms.spotLightDistance.value = lights.spot.distances;\n    uniforms.spotLightDirection.value = lights.spot.directions;\n    uniforms.spotLightAngleCos.value = lights.spot.anglesCos;\n    uniforms.spotLightExponent.value = lights.spot.exponents;\n\n    uniforms.hemisphereLightSkyColor.value = lights.hemi.skyColors;\n    uniforms.hemisphereLightGroundColor.value = lights.hemi.groundColors;\n    uniforms.hemisphereLightDirection.value = lights.hemi.positions;\n\n  }\n\n  // If uniforms are marked as clean, they don't need to be loaded to the GPU.\n\n  function markUniformsLightsNeedsUpdate(uniforms, boolean) {\n\n    uniforms.ambientLightColor.needsUpdate = boolean;\n\n    uniforms.directionalLightColor.needsUpdate = boolean;\n    uniforms.directionalLightDirection.needsUpdate = boolean;\n\n    uniforms.pointLightColor.needsUpdate = boolean;\n    uniforms.pointLightPosition.needsUpdate = boolean;\n    uniforms.pointLightDistance.needsUpdate = boolean;\n\n    uniforms.spotLightColor.needsUpdate = boolean;\n    uniforms.spotLightPosition.needsUpdate = boolean;\n    uniforms.spotLightDistance.needsUpdate = boolean;\n    uniforms.spotLightDirection.needsUpdate = boolean;\n    uniforms.spotLightAngleCos.needsUpdate = boolean;\n    uniforms.spotLightExponent.needsUpdate = boolean;\n\n    uniforms.hemisphereLightSkyColor.needsUpdate = boolean;\n    uniforms.hemisphereLightGroundColor.needsUpdate = boolean;\n    uniforms.hemisphereLightDirection.needsUpdate = boolean;\n\n  }\n\n  // Uniforms (load to GPU)\n\n  function loadUniformsMatrices(uniforms, object, camera) {\n\n    _objectModelViewMatrix.multiplyMatrices(camera.matrixWorldInverse, object.matrixWorld);\n\n    _gl.uniformMatrix4fv(uniforms.modelViewMatrix, false, _objectModelViewMatrix.elements);\n\n    if (uniforms.normalMatrix) {\n\n      _objectNormalMatrix.getNormalMatrix(_objectModelViewMatrix);\n\n      _gl.uniformMatrix3fv(uniforms.normalMatrix, false, _objectNormalMatrix.elements);\n\n    }\n\n    if (uniforms.modelMatrix !== null) {\n\n      _gl.uniformMatrix4fv(uniforms.modelMatrix, false, object.matrixWorld.elements);\n\n    }\n\n  }\n\n  function getTextureUnit() {\n\n    var textureUnit = _usedTextureUnits;\n\n    if (textureUnit >= _maxTextures) {\n\n      THREE.warn(\"WebGLRenderer: trying to use \" + textureUnit + \" texture units while this GPU supports only \" + _maxTextures);\n\n    }\n\n    _usedTextureUnits += 1;\n\n    return textureUnit;\n\n  }\n\n  function loadUniformsGeneric(uniforms) {\n\n    var texture, textureUnit, offset;\n\n    for (var j = 0, jl = uniforms.length; j < jl; j++) {\n\n      var uniform = uniforms[j][0];\n\n      // needsUpdate property is not added to all uniforms.\n      if (uniform.needsUpdate === false) continue;\n\n      // needsUpdate property is not added to all uniforms.\n      if (uniform.perObject)\n      continue;\n\n      var type = uniform.type;\n      var value = uniform.value;\n      var location = uniforms[j][1];\n\n      var i, il;\n\n      switch (type) {\n\n        case '1i':\n          _gl.uniform1i(location, value);\n          break;\n\n        case '1f':\n          _gl.uniform1f(location, value);\n          break;\n\n        case '2f':\n          _gl.uniform2f(location, value[0], value[1]);\n          break;\n\n        case '3f':\n          _gl.uniform3f(location, value[0], value[1], value[2]);\n          break;\n\n        case '4f':\n          _gl.uniform4f(location, value[0], value[1], value[2], value[3]);\n          break;\n\n        case '1iv':\n          _gl.uniform1iv(location, value);\n          break;\n\n        case '3iv':\n          _gl.uniform3iv(location, value);\n          break;\n\n        case '1fv':\n          _gl.uniform1fv(location, value);\n          break;\n\n        case '2fv':\n          _gl.uniform2fv(location, value);\n          break;\n\n        case '3fv':\n          _gl.uniform3fv(location, value);\n          break;\n\n        case '4fv':\n          _gl.uniform4fv(location, value);\n          break;\n\n        case 'Matrix3fv':\n          _gl.uniformMatrix3fv(location, false, value);\n          break;\n\n        case 'Matrix4fv':\n          _gl.uniformMatrix4fv(location, false, value);\n          break;\n\n        //\n\n        case 'i':\n\n          // single integer\n          _gl.uniform1i(location, value);\n\n          break;\n\n        case 'f':\n\n          // single float\n          _gl.uniform1f(location, value);\n\n          break;\n\n        case 'v2':\n\n          // single THREE.Vector2\n          _gl.uniform2f(location, value.x, value.y);\n\n          break;\n\n        case 'v3':\n\n          // single THREE.Vector3\n          _gl.uniform3f(location, value.x, value.y, value.z);\n\n          break;\n\n        case 'v4':\n\n          // single THREE.Vector4\n          _gl.uniform4f(location, value.x, value.y, value.z, value.w);\n\n          break;\n\n        case 'c':\n\n          // single THREE.Color\n          _gl.uniform3f(location, value.r, value.g, value.b);\n\n          break;\n\n        case 'iv1':\n\n          // flat array of integers (JS or typed array)\n          _gl.uniform1iv(location, value);\n\n          break;\n\n        case 'iv':\n\n          // flat array of integers with 3 x N size (JS or typed array)\n          _gl.uniform3iv(location, value);\n\n          break;\n\n        case 'fv1':\n\n          // flat array of floats (JS or typed array)\n          _gl.uniform1fv(location, value);\n\n          break;\n\n        case 'fv':\n\n          // flat array of floats with 3 x N size (JS or typed array)\n          _gl.uniform3fv(location, value);\n\n          break;\n\n        case 'v2v':\n\n          // array of THREE.Vector2\n\n          if (uniform._array === undefined) {\n\n            uniform._array = new Float32Array(2 * value.length);\n\n          }\n\n          for (i = 0, il = value.length; i < il; i++) {\n\n            offset = i * 2;\n\n            uniform._array[offset] = value[i].x;\n            uniform._array[offset + 1] = value[i].y;\n\n          }\n\n          _gl.uniform2fv(location, uniform._array);\n\n          break;\n\n        case 'v3v':\n\n          // array of THREE.Vector3\n\n          if (uniform._array === undefined) {\n\n            uniform._array = new Float32Array(3 * value.length);\n\n          }\n\n          for (i = 0, il = value.length; i < il; i++) {\n\n            offset = i * 3;\n\n            uniform._array[offset] = value[i].x;\n            uniform._array[offset + 1] = value[i].y;\n            uniform._array[offset + 2] = value[i].z;\n\n          }\n\n          _gl.uniform3fv(location, uniform._array);\n\n          break;\n\n        case 'v4v':\n\n          // array of THREE.Vector4\n\n          if (uniform._array === undefined) {\n\n            uniform._array = new Float32Array(4 * value.length);\n\n          }\n\n          for (i = 0, il = value.length; i < il; i++) {\n\n            offset = i * 4;\n\n            uniform._array[offset] = value[i].x;\n            uniform._array[offset + 1] = value[i].y;\n            uniform._array[offset + 2] = value[i].z;\n            uniform._array[offset + 3] = value[i].w;\n\n          }\n\n          _gl.uniform4fv(location, uniform._array);\n\n          break;\n\n        case 'm3':\n\n          // single THREE.Matrix3\n          _gl.uniformMatrix3fv(location, false, value.elements);\n\n          break;\n\n        case 'm3v':\n\n          // array of THREE.Matrix3\n\n          if (uniform._array === undefined) {\n\n            uniform._array = new Float32Array(9 * value.length);\n\n          }\n\n          for (i = 0, il = value.length; i < il; i++) {\n\n            value[i].flattenToArrayOffset(uniform._array, i * 9);\n\n          }\n\n          _gl.uniformMatrix3fv(location, false, uniform._array);\n\n          break;\n\n        case 'm4':\n\n          // single THREE.Matrix4\n          _gl.uniformMatrix4fv(location, false, value.elements);\n\n          break;\n\n        case 'm4v':\n\n          // array of THREE.Matrix4\n\n          if (uniform._array === undefined) {\n\n            uniform._array = new Float32Array(16 * value.length);\n\n          }\n\n          for (i = 0, il = value.length; i < il; i++) {\n\n            value[i].flattenToArrayOffset(uniform._array, i * 16);\n\n          }\n\n          _gl.uniformMatrix4fv(location, false, uniform._array);\n\n          break;\n\n        case 't':\n\n          // single THREE.Texture (2d or cube)\n\n          texture = value;\n          textureUnit = getTextureUnit();\n\n          _gl.uniform1i(location, textureUnit);\n\n          if (!texture) {\n            // Unbind whatever leftover texture might be in this slot.\n            // The texture itself is not yet (or perhaps ever) assigned, so we want to avoid getting\n            // some random leftover bound texture from another material. See https://jira.autodesk.com/browse/LMV-2993\n            _gl.activeTexture(_gl.TEXTURE0 + textureUnit);\n            _gl.bindTexture(_gl.TEXTURE_2D, _nullTexture.__webglTexture);\n            continue;\n          }\n\n          if (Array.isArray(texture.image) && texture.image.length === 6 || // CompressedTexture can have Array in image :/\n          texture instanceof THREE.CubeTexture) {\n\n            if (!texture.needsUpdate) {\n              _gl.activeTexture(_gl.TEXTURE0 + textureUnit);\n              _gl.bindTexture(_gl.TEXTURE_CUBE_MAP, texture.__webglTextureCube);\n            } else {\n              setCubeTexture(texture, textureUnit);\n            }\n\n          } else if (texture instanceof THREE.WebGLRenderTargetCube) {\n\n            setCubeTextureDynamic(texture, textureUnit);\n\n          } else {\n\n            _this.setTexture(texture, textureUnit);\n\n          }\n\n          break;\n\n        case 'tv':\n\n          // array of THREE.Texture (2d)\n\n          if (uniform._array === undefined) {\n\n            uniform._array = [];\n\n          }\n\n          for (i = 0, il = uniform.value.length; i < il; i++) {\n\n            uniform._array[i] = getTextureUnit();\n\n          }\n\n          _gl.uniform1iv(location, uniform._array);\n\n          for (i = 0, il = uniform.value.length; i < il; i++) {\n\n            texture = uniform.value[i];\n            textureUnit = uniform._array[i];\n\n            if (!texture) continue;\n\n            _this.setTexture(texture, textureUnit);\n\n          }\n\n          break;\n\n        default:\n\n          THREE.warn('THREE.WebGLRenderer: Unknown uniform type: ' + type);}\n\n\n\n    }\n\n  }\n\n  //\n\n  /* not used\n  function setColorGamma( array, offset, color, intensitySq ) {\n       array[ offset ]     = color.r * color.r * intensitySq;\n      array[ offset + 1 ] = color.g * color.g * intensitySq;\n      array[ offset + 2 ] = color.b * color.b * intensitySq;\n   }\n  */\n\n\n\n  function setColorLinear(array, offset, color, intensity) {\n\n    array[offset] = color.r * intensity;\n    array[offset + 1] = color.g * intensity;\n    array[offset + 2] = color.b * intensity;\n\n  }\n\n  function setupLights(lights) {\n\n    var l,ll,light,\n    r = 0,g = 0,b = 0,\n    color,skyColor,groundColor,\n    intensity,\n    distance,\n\n    zlights = _lights,\n\n    dirColors = zlights.directional.colors,\n    dirPositions = zlights.directional.positions,\n\n    pointColors = zlights.point.colors,\n    pointPositions = zlights.point.positions,\n    pointDistances = zlights.point.distances,\n\n    spotColors = zlights.spot.colors,\n    spotPositions = zlights.spot.positions,\n    spotDistances = zlights.spot.distances,\n    spotDirections = zlights.spot.directions,\n    spotAnglesCos = zlights.spot.anglesCos,\n    spotExponents = zlights.spot.exponents,\n\n    hemiSkyColors = zlights.hemi.skyColors,\n    hemiGroundColors = zlights.hemi.groundColors,\n    hemiPositions = zlights.hemi.positions,\n\n    dirLength = 0,\n    pointLength = 0,\n    spotLength = 0,\n    hemiLength = 0,\n\n    dirCount = 0,\n    pointCount = 0,\n    spotCount = 0,\n    hemiCount = 0,\n\n    dirOffset = 0,\n    pointOffset = 0,\n    spotOffset = 0,\n    hemiOffset = 0;\n\n    for (l = 0, ll = lights.length; l < ll; l++) {\n\n      light = lights[l];\n\n      if (light.onlyShadow) continue;\n\n      color = light.color;\n      intensity = light.intensity;\n      distance = light.distance;\n\n      if (light instanceof THREE.AmbientLight) {\n\n        if (!light.visible) continue;\n\n        r += color.r;\n        g += color.g;\n        b += color.b;\n\n      } else if (light instanceof THREE.DirectionalLight) {\n\n        dirCount += 1;\n\n        if (!light.visible) continue;\n\n        _direction.setFromMatrixPosition(light.matrixWorld);\n        _vector3.setFromMatrixPosition(light.target.matrixWorld);\n        _direction.sub(_vector3);\n        _direction.normalize();\n\n        dirOffset = dirLength * 3;\n\n        dirPositions[dirOffset] = _direction.x;\n        dirPositions[dirOffset + 1] = _direction.y;\n        dirPositions[dirOffset + 2] = _direction.z;\n\n        setColorLinear(dirColors, dirOffset, color, intensity);\n\n        dirLength += 1;\n\n      } else if (light instanceof THREE.PointLight) {\n\n        pointCount += 1;\n\n        if (!light.visible) continue;\n\n        pointOffset = pointLength * 3;\n\n\n        setColorLinear(pointColors, pointOffset, color, intensity);\n\n\n        _vector3.setFromMatrixPosition(light.matrixWorld);\n\n        pointPositions[pointOffset] = _vector3.x;\n        pointPositions[pointOffset + 1] = _vector3.y;\n        pointPositions[pointOffset + 2] = _vector3.z;\n\n        pointDistances[pointLength] = distance;\n\n        pointLength += 1;\n\n      } else if (light instanceof THREE.SpotLight) {\n\n        spotCount += 1;\n\n        if (!light.visible) continue;\n\n        spotOffset = spotLength * 3;\n\n        setColorLinear(spotColors, spotOffset, color, intensity);\n\n        _vector3.setFromMatrixPosition(light.matrixWorld);\n\n        spotPositions[spotOffset] = _vector3.x;\n        spotPositions[spotOffset + 1] = _vector3.y;\n        spotPositions[spotOffset + 2] = _vector3.z;\n\n        spotDistances[spotLength] = distance;\n\n        _direction.copy(_vector3);\n        _vector3.setFromMatrixPosition(light.target.matrixWorld);\n        _direction.sub(_vector3);\n        _direction.normalize();\n\n        spotDirections[spotOffset] = _direction.x;\n        spotDirections[spotOffset + 1] = _direction.y;\n        spotDirections[spotOffset + 2] = _direction.z;\n\n        spotAnglesCos[spotLength] = Math.cos(light.angle);\n        spotExponents[spotLength] = light.exponent;\n\n        spotLength += 1;\n\n      } else if (light instanceof THREE.HemisphereLight) {\n\n        hemiCount += 1;\n\n        if (!light.visible) continue;\n\n        _direction.setFromMatrixPosition(light.matrixWorld);\n        _direction.normalize();\n\n        hemiOffset = hemiLength * 3;\n\n        hemiPositions[hemiOffset] = _direction.x;\n        hemiPositions[hemiOffset + 1] = _direction.y;\n        hemiPositions[hemiOffset + 2] = _direction.z;\n\n        skyColor = light.color;\n        groundColor = light.groundColor;\n\n        setColorLinear(hemiSkyColors, hemiOffset, skyColor, intensity);\n        setColorLinear(hemiGroundColors, hemiOffset, groundColor, intensity);\n\n        hemiLength += 1;\n\n      }\n\n    }\n\n    // null eventual remains from removed lights\n    // (this is to avoid if in shader)\n\n    for (l = dirLength * 3, ll = Math.max(dirColors.length, dirCount * 3); l < ll; l++) {dirColors[l] = 0.0;}\n    for (l = pointLength * 3, ll = Math.max(pointColors.length, pointCount * 3); l < ll; l++) {pointColors[l] = 0.0;}\n    for (l = spotLength * 3, ll = Math.max(spotColors.length, spotCount * 3); l < ll; l++) {spotColors[l] = 0.0;}\n    for (l = hemiLength * 3, ll = Math.max(hemiSkyColors.length, hemiCount * 3); l < ll; l++) {hemiSkyColors[l] = 0.0;}\n    for (l = hemiLength * 3, ll = Math.max(hemiGroundColors.length, hemiCount * 3); l < ll; l++) {hemiGroundColors[l] = 0.0;}\n\n    zlights.directional.length = dirLength;\n    zlights.point.length = pointLength;\n    zlights.spot.length = spotLength;\n    zlights.hemi.length = hemiLength;\n\n    zlights.ambient[0] = r;\n    zlights.ambient[1] = g;\n    zlights.ambient[2] = b;\n\n  }\n\n  // GL state setting\n\n  this.setFaceCulling = function (cullFace, frontFaceDirection) {\n\n    if (cullFace === THREE.CullFaceNone) {\n\n      _gl.disable(_gl.CULL_FACE);\n\n    } else {\n\n      if (frontFaceDirection === THREE.FrontFaceDirectionCW) {\n\n        _gl.frontFace(_gl.CW);\n\n      } else {\n\n        _gl.frontFace(_gl.CCW);\n\n      }\n\n      if (cullFace === THREE.CullFaceBack) {\n\n        _gl.cullFace(_gl.BACK);\n\n      } else if (cullFace === THREE.CullFaceFront) {\n\n        _gl.cullFace(_gl.FRONT);\n\n      } else {\n\n        _gl.cullFace(_gl.FRONT_AND_BACK);\n\n      }\n\n      _gl.enable(_gl.CULL_FACE);\n\n    }\n\n  };\n\n\n  // NOTE: if you change the .side value of a material itself, you need to set\n  // material.needsUpdate = true, so that the material's shaders are recompiled.\n  // You definitely want to avoid this recompilation per frame; usually the\n  // THREE.DoubleSided setting works fine for both back and front side display,\n  // even if the colors of the sides are different (which are simply uniforms\n  // being changed, not the programs themselves).\n  this.setMaterialFaces = function (material) {\n\n    state.setDoubleSided(material.side === THREE.DoubleSide);\n    state.setFlipSided(material.side === THREE.BackSide);\n\n  };\n\n  // Textures\n\n\n  function setTextureParameters(textureType, texture, isImagePowerOfTwo) {\n\n    var extension;\n\n    if (isImagePowerOfTwo) {\n\n      _gl.texParameteri(textureType, _gl.TEXTURE_WRAP_S, paramThreeToGL(texture.wrapS));\n      _gl.texParameteri(textureType, _gl.TEXTURE_WRAP_T, paramThreeToGL(texture.wrapT));\n\n      _gl.texParameteri(textureType, _gl.TEXTURE_MAG_FILTER, paramThreeToGL(texture.magFilter));\n      _gl.texParameteri(textureType, _gl.TEXTURE_MIN_FILTER, paramThreeToGL(texture.minFilter));\n\n    } else {\n\n      _gl.texParameteri(textureType, _gl.TEXTURE_WRAP_S, _gl.CLAMP_TO_EDGE);\n      _gl.texParameteri(textureType, _gl.TEXTURE_WRAP_T, _gl.CLAMP_TO_EDGE);\n\n      if (texture.wrapS !== THREE.ClampToEdgeWrapping || texture.wrapT !== THREE.ClampToEdgeWrapping) {\n\n        THREE.warn('THREE.WebGLRenderer: Texture is not power of two. Texture.wrapS and Texture.wrapT should be set to THREE.ClampToEdgeWrapping. ( ' + texture.sourceFile + ' )');\n\n      }\n\n      _gl.texParameteri(textureType, _gl.TEXTURE_MAG_FILTER, filterFallback(texture.magFilter));\n      _gl.texParameteri(textureType, _gl.TEXTURE_MIN_FILTER, filterFallback(texture.minFilter));\n\n      if (texture.minFilter !== THREE.NearestFilter && texture.minFilter !== THREE.LinearFilter) {\n\n        THREE.warn('THREE.WebGLRenderer: Texture is not power of two. Texture.minFilter should be set to THREE.NearestFilter or THREE.LinearFilter. ( ' + texture.sourceFile + ' )');\n\n      }\n\n    }\n\n    extension = extensions.get('EXT_texture_filter_anisotropic');\n\n    if (extension && texture.type !== THREE.FloatType && texture.type !== THREE.HalfFloatType) {\n\n      if (texture.anisotropy > 1 || texture.__oldAnisotropy) {\n\n        _gl.texParameterf(textureType, extension.TEXTURE_MAX_ANISOTROPY_EXT, Math.min(texture.anisotropy, _this.getMaxAnisotropy()));\n        texture.__oldAnisotropy = texture.anisotropy;\n\n      }\n\n    }\n\n  }\n\n\n  this.uploadTexture = function (texture) {\n\n    if (texture.__webglInit === undefined) {\n\n      texture.__webglInit = true;\n\n      texture.addEventListener('dispose', onTextureDispose);\n\n      texture.__webglTexture = _gl.createTexture();\n\n      _this.info.memory.textures++;\n\n    }\n\n    _gl.bindTexture(_gl.TEXTURE_2D, texture.__webglTexture);\n\n    _gl.pixelStorei(_gl.UNPACK_FLIP_Y_WEBGL, texture.flipY);\n    _gl.pixelStorei(_gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, texture.premultiplyAlpha);\n    _gl.pixelStorei(_gl.UNPACK_ALIGNMENT, texture.unpackAlignment);\n\n    texture.image = clampToMaxSize(texture.image, _maxTextureSize);\n\n    var image = texture.image,\n    isImagePowerOfTwo = THREE.Math.isPowerOfTwo(image.width) && THREE.Math.isPowerOfTwo(image.height),\n    glFormat = paramThreeToGL(texture.format),\n    glType = paramThreeToGL(texture.type),\n    glInternalFormat = paramToInternal(texture.format, texture.type);\n\n    setTextureParameters(_gl.TEXTURE_2D, texture, isImagePowerOfTwo);\n\n    var mipmap,mipmaps = texture.mipmaps;\n    var i, il;\n\n    if (texture instanceof THREE.DataTexture) {\n\n      // use manually created mipmaps if available\n      // if there are no manual mipmaps\n      // set 0 level mipmap and then use GL to generate other mipmap levels\n\n      if (mipmaps.length > 0 && isImagePowerOfTwo) {\n\n        for (i = 0, il = mipmaps.length; i < il; i++) {\n\n          mipmap = mipmaps[i];\n          _gl.texImage2D(_gl.TEXTURE_2D, i, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data);\n\n        }\n\n        texture.generateMipmaps = false;\n\n      } else {\n\n        _gl.texImage2D(_gl.TEXTURE_2D, 0, glInternalFormat, image.width, image.height, 0, glFormat, glType, image.data);\n\n      }\n\n    } else if (texture instanceof THREE.CompressedTexture) {\n\n      for (i = 0, il = mipmaps.length; i < il; i++) {\n\n        mipmap = mipmaps[i];\n\n        if (texture.format !== THREE.RGBAFormat && texture.format !== THREE.RGBFormat) {\n\n          if (getCompressedTextureFormats().indexOf(glFormat) > -1) {\n\n            _gl.compressedTexImage2D(_gl.TEXTURE_2D, i, glInternalFormat, mipmap.width, mipmap.height, 0, mipmap.data);\n\n          } else {\n\n            THREE.warn(\"Attempt to load unsupported compressed texture format\");\n\n          }\n\n        } else {\n\n          _gl.texImage2D(_gl.TEXTURE_2D, i, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data);\n\n        }\n      }\n\n      // make sure compressed texture pyramids are complete (i.e. include all levels\n      // between what ever was the coarsest level in file and 1x1)\n      if (mipmaps.length > 1 && getCompressedTextureFormats().indexOf(glFormat) > -1)\n      {\n        var w = mipmap.width >> 1,\n        h = mipmap.height >> 1,\n        l = mipmaps.length;\n\n        var view;\n\n        while (w >= 1 || h >= 1) {\n          view = mipmap.width == 4 && mipmap.height == 4 ? mipmap.data : new DataView(\n          mipmap.data.buffer,\n          mipmap.data.byteOffset,\n          mipmap.data.byteLength * (Math.max(w, 4) * Math.max(h, 4)) / (mipmap.width * mipmap.height));\n\n\n          _gl.compressedTexImage2D(_gl.TEXTURE_2D, l, glInternalFormat, Math.max(w, 1), Math.max(h, 1), 0, view);\n          w = w >> 1;\n          h = h >> 1;\n          ++l;\n        }\n      }\n\n    } else {// regular Texture (image, video, canvas)\n\n      // use manually created mipmaps if available\n      // if there are no manual mipmaps\n      // set 0 level mipmap and then use GL to generate other mipmap levels\n\n      if (mipmaps.length > 0 && isImagePowerOfTwo) {\n\n        for (i = 0, il = mipmaps.length; i < il; i++) {\n\n          _gl.texImage2D(_gl.TEXTURE_2D, i, glInternalFormat, glFormat, glType, mipmaps[i]);\n\n        }\n\n        texture.generateMipmaps = false;\n\n      } else {\n\n        _gl.texImage2D(_gl.TEXTURE_2D, 0, glInternalFormat, glFormat, glType, texture.image);\n\n      }\n\n    }\n\n    if (texture.generateMipmaps && isImagePowerOfTwo) _gl.generateMipmap(_gl.TEXTURE_2D);\n\n    texture.needsUpdate = false;\n\n    if (texture.onUpdate) texture.onUpdate();\n\n  };\n\n  this.setTexture = function (texture, slot) {\n    _gl.activeTexture(_gl.TEXTURE0 + slot);\n    if (texture.needsUpdate) {\n      _this.uploadTexture(texture);\n    } else if (texture.__webglTexture) {\n      _gl.bindTexture(_gl.TEXTURE_2D, texture.__webglTexture);\n    } else {\n      // No texture available, so don't \"use\" the texture unit, but make sure the uniform is assigned to something.\n      // This avoids headaches where the texture is bound as output this pass, but was an input last pass\n      // and is still bound to the given texture unit.\n      // Note that Chrome will flag warnings if you bind to null but are \"using\" the sampler (even though you're not).\n      // So we bind to this bogus texture instead.\n      // TODO Better for us might be to not have the unused uniforms in our shaders.\n      _gl.bindTexture(_gl.TEXTURE_2D, _nullTexture.__webglTexture);\n    }\n  };\n  // This function is finally defined, so we can use it now.\n  _this.uploadTexture(_nullTexture);\n\n  function clampToMaxSize(image, maxSize) {\n\n    if (image.width <= maxSize && image.height <= maxSize) {\n\n      return image;\n\n    }\n\n    // Warning: Scaling through the canvas will only work with images that use\n    // premultiplied alpha.\n\n    var maxDimension = Math.max(image.width, image.height);\n    var newWidth = Math.floor(image.width * maxSize / maxDimension);\n    var newHeight = Math.floor(image.height * maxSize / maxDimension);\n\n    var canvas = _document.createElement('canvas');\n    canvas.width = newWidth;\n    canvas.height = newHeight;\n\n    var ctx = canvas.getContext(\"2d\");\n    ctx.drawImage(image, 0, 0, image.width, image.height, 0, 0, newWidth, newHeight);\n\n    return canvas;\n\n  }\n\n  function setCubeTexture(texture, slot) {\n\n    if (texture.image.length === 6) {\n\n      if (texture.needsUpdate) {\n\n        if (!texture.__webglTextureCube) {\n\n          texture.addEventListener('dispose', onTextureDispose);\n\n          texture.__webglTextureCube = _gl.createTexture();\n\n          _this.info.memory.textures++;\n\n        }\n\n        _gl.activeTexture(_gl.TEXTURE0 + slot);\n        _gl.bindTexture(_gl.TEXTURE_CUBE_MAP, texture.__webglTextureCube);\n\n        _gl.pixelStorei(_gl.UNPACK_FLIP_Y_WEBGL, texture.flipY);\n\n        var isCompressed = texture instanceof THREE.CompressedTexture;\n        var isDataTexture = texture.image[0] instanceof THREE.DataTexture;\n\n        var cubeImage = [];\n\n        var i;\n\n        for (i = 0; i < 6; i++) {\n\n          if (_this.autoScaleCubemaps && !isCompressed && !isDataTexture) {\n\n            cubeImage[i] = clampToMaxSize(texture.image[i], _maxCubemapSize);\n\n          } else {\n\n            cubeImage[i] = isDataTexture ? texture.image[i].image : texture.image[i];\n\n          }\n\n        }\n\n        var image = cubeImage[0],\n        isImagePowerOfTwo = THREE.Math.isPowerOfTwo(image.width) && THREE.Math.isPowerOfTwo(image.height),\n        glFormat = paramThreeToGL(texture.format),\n        glType = paramThreeToGL(texture.type);\n\n        setTextureParameters(_gl.TEXTURE_CUBE_MAP, texture, isImagePowerOfTwo);\n\n        for (i = 0; i < 6; i++) {\n\n          if (!isCompressed) {\n\n            if (isDataTexture) {\n\n              _gl.texImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, glFormat, cubeImage[i].width, cubeImage[i].height, 0, glFormat, glType, cubeImage[i].data);\n\n            } else {\n\n              _gl.texImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, glFormat, glFormat, glType, cubeImage[i]);\n\n            }\n\n          } else {\n\n            var mipmap,mipmaps = cubeImage[i].mipmaps;\n\n            for (var j = 0, jl = mipmaps.length; j < jl; j++) {\n\n              mipmap = mipmaps[j];\n\n              if (texture.format !== THREE.RGBAFormat && texture.format !== THREE.RGBFormat) {\n\n                if (getCompressedTextureFormats().indexOf(glFormat) > -1) {\n\n                  _gl.compressedTexImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j, glFormat, mipmap.width, mipmap.height, 0, mipmap.data);\n\n                } else {\n\n                  THREE.warn(\"Attempt to load unsupported compressed texture format\");\n\n                }\n\n              } else {\n\n                _gl.texImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j, glFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data);\n\n              }\n\n            }\n\n          }\n\n        }\n\n        if (texture.generateMipmaps && isImagePowerOfTwo) {\n\n          _gl.generateMipmap(_gl.TEXTURE_CUBE_MAP);\n\n        }\n\n        texture.needsUpdate = false;\n\n        if (texture.onUpdate) texture.onUpdate();\n\n      } else {\n\n        _gl.activeTexture(_gl.TEXTURE0 + slot);\n        _gl.bindTexture(_gl.TEXTURE_CUBE_MAP, texture.__webglTextureCube);\n\n      }\n\n    }\n\n  }\n\n  function setCubeTextureDynamic(texture, slot) {\n\n    _gl.activeTexture(_gl.TEXTURE0 + slot);\n    _gl.bindTexture(_gl.TEXTURE_CUBE_MAP, texture.__webglTexture);\n\n  }\n\n  // Render targets\n\n  function bindDrawBuffers(renderTargets) {\n\n    var attachment0 = _isWebGL2 ? _gl.COLOR_ATTACHMENT0 : _glExtensionDrawBuffers.COLOR_ATTACHMENT0_WEBGL;\n\n    var bufs = [attachment0];\n    for (i = 1; i < renderTargets.length; i++) {\n      bufs.push(attachment0 + i);\n    }\n    _isWebGL2 ? _gl.drawBuffers(bufs) : _glExtensionDrawBuffers.drawBuffersWEBGL(bufs);\n  }\n\n  function createBackingTexture(rt) {\n\n    var isTargetPowerOfTwo = THREE.Math.isPowerOfTwo(rt.width) && THREE.Math.isPowerOfTwo(rt.height),\n    glFormat = paramThreeToGL(rt.format),\n    glType = paramThreeToGL(rt.type),\n    glInternalFormat = paramToInternal(rt.format, rt.type);\n\n    rt.addEventListener('dispose', onRenderTargetDispose);\n\n    rt.__webglTexture = _gl.createTexture();\n\n    _this.info.memory.textures++;\n\n    _gl.bindTexture(_gl.TEXTURE_2D, rt.__webglTexture);\n\n    setTextureParameters(_gl.TEXTURE_2D, rt, isTargetPowerOfTwo);\n\n    _gl.texImage2D(_gl.TEXTURE_2D, 0, glInternalFormat, rt.width, rt.height, 0, glFormat, glType, null);\n\n    if (isTargetPowerOfTwo && rt.generateMipmaps)\n    _gl.generateMipmap(_gl.TEXTURE_2D);\n\n  }\n\n  function didColorAttachmentsChange(primaryTarget, renderTargets) {\n\n    var bufs = primaryTarget.__webglBoundBuffers;\n\n    if (!bufs) {\n      return true;\n    }\n\n    if (bufs.length !== renderTargets.length) {\n      return true;\n    }\n\n    for (var _i = 0; _i < renderTargets.length; _i++) {\n      if (renderTargets[_i] !== bufs[_i]) {\n        return true;\n      }\n    }\n\n    return false;\n  }\n\n\n  this.initFrameBufferMRT = function (renderTargets, verifyFrameBufferWorks) {\n\n    var primaryTarget = renderTargets[0];\n    var clearState = false;\n\n    //For MRT, the frame and depth buffer are owned\n    //by the first target.\n    if (primaryTarget && !primaryTarget.__webglFramebuffer) {\n\n      if (primaryTarget.depthBuffer === undefined) primaryTarget.depthBuffer = true;\n      if (primaryTarget.stencilBuffer === undefined) primaryTarget.stencilBuffer = true;\n\n      primaryTarget.__webglFramebuffer = _gl.createFramebuffer();\n\n      _gl.bindFramebuffer(_gl.FRAMEBUFFER, primaryTarget.__webglFramebuffer);\n\n      var renderbuffer;\n\n      //Allocate depth buffer if needed\n\n      if (primaryTarget.shareDepthFrom) {\n\n        renderbuffer = primaryTarget.__webglRenderbuffer = primaryTarget.shareDepthFrom.__webglRenderbuffer;\n\n      } else {\n\n        // Below we can delete the frame buffer from a render target without deleting the render buffer\n        // Use the existing render buffer if it is present. This fixes problems with shared depth buffers.\n        // The problem is that the color depth buffer could get changed after it was bound to the frame\n        // buffer a target that shares the depth buffer. Using the existing depth buffer, keep it consistent.\n        renderbuffer = primaryTarget.__webglRenderbuffer;\n\n        if (primaryTarget.depthBuffer && !primaryTarget.stencilBuffer) {\n\n          if (!renderbuffer) {\n            renderbuffer = primaryTarget.__webglRenderbuffer = _gl.createRenderbuffer();\n          }\n\n          _gl.bindRenderbuffer(_gl.RENDERBUFFER, renderbuffer);\n\n          _gl.renderbufferStorage(_gl.RENDERBUFFER, _isWebGL2 ? _gl.DEPTH_COMPONENT32F : _gl.DEPTH_COMPONENT16, primaryTarget.width, primaryTarget.height);\n\n        } else if (primaryTarget.depthBuffer && primaryTarget.stencilBuffer) {\n\n          if (!renderbuffer) {\n            renderbuffer = primaryTarget.__webglRenderbuffer = _gl.createRenderbuffer();\n          }\n\n          _gl.bindRenderbuffer(_gl.RENDERBUFFER, renderbuffer);\n\n          _gl.renderbufferStorage(_gl.RENDERBUFFER, _isWebGL2 ? _gl.DEPTH24_STENCIL8 : _gl.DEPTH_STENCIL, primaryTarget.width, primaryTarget.height);\n\n        } else {\n\n          //_gl.renderbufferStorage( _gl.RENDERBUFFER, _gl.RGBA4, primaryTarget.width, primaryTarget.height );\n\n        }\n\n      }\n\n      //Bind depth buffer\n\n      if (primaryTarget.depthBuffer && !primaryTarget.stencilBuffer) {\n\n        _gl.framebufferRenderbuffer(_gl.FRAMEBUFFER, _gl.DEPTH_ATTACHMENT, _gl.RENDERBUFFER, renderbuffer);\n\n      } else if (primaryTarget.depthBuffer && primaryTarget.stencilBuffer) {\n\n        _gl.framebufferRenderbuffer(_gl.FRAMEBUFFER, _gl.DEPTH_STENCIL_ATTACHMENT, _gl.RENDERBUFFER, renderbuffer);\n\n      }\n\n      clearState = true;\n    }\n\n    var tmpBuf = _currentFramebuffer;\n\n    _gl.bindFramebuffer(_gl.FRAMEBUFFER, primaryTarget.__webglFramebuffer);\n\n    if (didColorAttachmentsChange(primaryTarget, renderTargets)) {\n      //Create backing textures for all the targets and attach them\n      //to the frame buffer.\n      var i;\n      for (i = 0; i < renderTargets.length; i++) {\n        var rt = renderTargets[i];\n\n        if (rt && !rt.__webglTexture) {\n          createBackingTexture(rt);\n        }\n\n        _gl.framebufferTexture2D(_gl.FRAMEBUFFER, _gl.COLOR_ATTACHMENT0 + i, _gl.TEXTURE_2D, rt && rt.__webglTexture, 0);\n      }\n\n      /*\n         * Set remaining (any formerly bound) render targets to null\n         * IMPORTANT: Up until recently, whenever we would switch from a framebuffer with 3 attachments\n         * to a framebuffer with 2 attachments, we would just ignore the extraneous attachment, and it\n         * worked fine.\n         * As of Chrome version 54, we can no longer do that. If we try to keep the extra attachment\n         * linked to the framebuffer, Chrome errors out with \"framebuffer incomplete\".\n         */\n      i = renderTargets.length;\n      var maxBuffers = primaryTarget.__webglBoundBuffers && primaryTarget.__webglBoundBuffers.length || i;\n      while (i < maxBuffers) {\n        _gl.framebufferTexture2D(_gl.FRAMEBUFFER, _gl.COLOR_ATTACHMENT0 + i, _gl.TEXTURE_2D, null, 0);\n        i++;\n      }\n\n      primaryTarget.__webglBoundBuffers = renderTargets.slice();\n    }\n\n    if (this.supportsMRT()) {\n      bindDrawBuffers(renderTargets);\n    }\n\n    if (verifyFrameBufferWorks) {\n      var status = _gl.checkFramebufferStatus(_gl.FRAMEBUFFER);\n      if (status !== _gl.FRAMEBUFFER_COMPLETE) {\n        THREE.log(\"Can't use multiple render targets. Falling back to two passes. \" + status);\n        // Delete the frame buffer before removing the __webglFramebuffer property.\n        // I think you could keep the frame buffer if you just cleared the color attachments.\n        if (tmpBuf === primaryTarget.__webglFramebuffer) {\n          // Make sure we don't bind the delete frame buffer.\n          tmpBuf = _currentFramebuffer = null;\n        }\n        // Bind the old frame buffer. Don't know if deleting a bound frame buffer is a good idea.\n        _gl.bindFramebuffer(_gl.FRAMEBUFFER, tmpBuf);\n        _gl.deleteFramebuffer(primaryTarget.__webglFramebuffer);\n        delete primaryTarget.__webglFramebuffer;\n        verifyFrameBufferWorks = false;\n      }\n    }\n\n    _gl.bindFramebuffer(_gl.FRAMEBUFFER, tmpBuf);\n\n    if (clearState) {\n      // Release everything\n      _gl.bindTexture(_gl.TEXTURE_2D, null);\n      _gl.bindRenderbuffer(_gl.RENDERBUFFER, null);\n      _gl.bindFramebuffer(_gl.FRAMEBUFFER, null);\n    }\n\n    return verifyFrameBufferWorks;\n  };\n\n\n  //[Firefly] This function is different from Three.js -- it adds\n  //support for binding multiple render targets.\n  this.setRenderTarget = function (renderTargets) {\n\n    var renderTarget;\n\n    // We need to be a little careful about how we handle the frameBuffer for\n    // the render target. If we call this method with an array of render targets\n    // and then later with the first render target in the array by itself we can\n    // use the MRT __webglFrameBuffer when we needed to reinitialize it for the\n    // render target alone. Use initForMRT on the render target to keep this from\n    // happening. This was happening for the ghosting pass which follows the\n    // beauty pass, but only caused errors when used with instanced draw calls.\n    if (Array.isArray(renderTargets)) {\n      this.initFrameBufferMRT(renderTargets);\n      renderTarget = renderTargets[0];\n      renderTarget.initForMRT = true;\n    } else if (renderTargets) {\n      var fb = renderTargets.__webglFramebuffer;\n      if (!fb || _currentFramebuffer !== fb || renderTargets.initForMRT) {\n        this.initFrameBufferMRT([renderTargets]);\n      }\n      renderTarget = renderTargets;\n      renderTarget.initForMRT = false;\n    }\n\n    var framebuffer, width, height, vx, vy;\n\n    // Consider current viewport when rendering to framebuffer or if enabled for offscreen targets.        \n    var useViewport = !renderTarget || _enableViewportOnOffscreenTargets;\n    if (useViewport) {\n      width = _viewportWidth;\n      height = _viewportHeight;\n      vx = _viewportX;\n      vy = _viewportY;\n    } else {\n      width = renderTarget.width;\n      height = renderTarget.height;\n      vx = 0;\n      vy = 0;\n    }\n\n    framebuffer = renderTarget ? renderTarget.__webglFramebuffer : null;\n\n    if (framebuffer !== _currentFramebuffer) {\n\n      _gl.bindFramebuffer(_gl.FRAMEBUFFER, framebuffer);\n      _currentFramebuffer = framebuffer;\n\n    }\n\n    _gl.viewport(vx, vy, width, height);\n\n    //_currentWidth = width;\n    //_currentHeight = height;\n\n  };\n\n\n  //We need to use more than WebGL 1.0 technically allows -- we use\n  //different bit depth sizes for the render targets, which is not\n  //legal WebGL 1.0, but will work eventually and some platforms/browsers\n  //already allow it. For others, we have to try, check for failure, and disable use of MRT dynamically.\n  this.verifyMRTWorks = function (renderTargets) {\n    if (this.supportsMRT()) {\n      return this.initFrameBufferMRT(renderTargets, true);\n    }\n    return false;\n  };\n\n\n  this.readRenderTargetPixels = function (renderTarget, x, y, width, height, buffer) {\n\n    if (!(renderTarget instanceof THREE.WebGLRenderTarget)) {\n\n      THREE.error('THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not THREE.WebGLRenderTarget.');\n      return;\n\n    }\n\n    if (renderTarget.__webglFramebuffer) {\n\n      //Just a rough sanity check -- different browsers support different combinations\n      //The check is for the most restrictive implementation (ANGLE). It can be relaxed once\n      //Chrome dumps ANGLE. Note that targets of format RGB and unsigned byte type can be read with readPixels using GL_RGBA\n      //as the format parameter (apparently). But this is not the case for float targets -- for those you have\n      //to change the code to readPixels with the correct format.\n      if (renderTarget.format !== THREE.RGBAFormat &&\n      renderTarget.format !== THREE.RGBFormat ||\n      renderTarget.type !== THREE.UnsignedByteType) {\n\n        THREE.error('THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not a readable format.');\n        return;\n\n      }\n\n      var restore = false;\n\n      if (renderTarget.__webglFramebuffer !== _currentFramebuffer) {\n\n        _gl.bindFramebuffer(_gl.FRAMEBUFFER, renderTarget.__webglFramebuffer);\n\n        restore = true;\n\n      }\n\n      if (renderTarget.canReadPixels || _gl.checkFramebufferStatus(_gl.FRAMEBUFFER) === _gl.FRAMEBUFFER_COMPLETE) {\n\n        _gl.readPixels(x, y, width, height, _gl.RGBA, _gl.UNSIGNED_BYTE, buffer);\n\n      } else {\n\n        THREE.error('THREE.WebGLRenderer.readRenderTargetPixels: readPixels from renderTarget failed. Framebuffer not complete.');\n\n      }\n\n      if (restore) {\n\n        _gl.bindFramebuffer(_gl.FRAMEBUFFER, _currentFramebuffer);\n\n      }\n\n    }\n  };\n\n  function updateRenderTargetMipmap(renderTarget) {\n\n    _gl.bindTexture(_gl.TEXTURE_2D, renderTarget.__webglTexture);\n    _gl.generateMipmap(_gl.TEXTURE_2D);\n    _gl.bindTexture(_gl.TEXTURE_2D, null);\n\n  }\n\n  // Fallback filters for non-power-of-2 textures\n\n  function filterFallback(f) {\n\n    if (f === THREE.NearestFilter || f === THREE.NearestMipMapNearestFilter || f === THREE.NearestMipMapLinearFilter) {\n\n      return _gl.NEAREST;\n\n    }\n\n    return _gl.LINEAR;\n\n  }\n\n  // Map three.js constants to WebGL constants\n\n  function paramToInternal(format, type) {\n\n    if (_isWebGL2) {\n      if (format === THREE.RGBFormat) {\n        switch (type) {\n          case THREE.UnsignedByteType:return _gl.RGB8;\n          case THREE.FloatType:return _gl.RGB32F;\n          case THREE.HalfFloatType:return _gl.RGB16F;\n          default:break;}\n\n      } else if (format === THREE.RGBAFormat) {\n        switch (type) {\n          case THREE.UnsignedByteType:return _gl.RGBA8;\n          case THREE.FloatType:return _gl.RGBA32F;\n          case THREE.HalfFloatType:return _gl.RGBA16F;\n          default:break;}\n\n      } else if (format === THREE.LuminanceFormat) {\n        switch (type) {\n          case THREE.UnsignedByteType:return _gl.LUMINANCE; //TODO: There doesn't seem to be _gl.LUMINANCE8 defined?\n          default:break;}\n\n      }\n\n      console.error(\"failed to map texture format and type to internalformat\");\n    }\n\n    return paramThreeToGL(format);\n  }\n\n  function paramThreeToGL(p) {\n\n    var extension;\n\n    if (p === THREE.RepeatWrapping) return _gl.REPEAT;\n    if (p === THREE.ClampToEdgeWrapping) return _gl.CLAMP_TO_EDGE;\n    if (p === THREE.MirroredRepeatWrapping) return _gl.MIRRORED_REPEAT;\n\n    if (p === THREE.NearestFilter) return _gl.NEAREST;\n    if (p === THREE.NearestMipMapNearestFilter) return _gl.NEAREST_MIPMAP_NEAREST;\n    if (p === THREE.NearestMipMapLinearFilter) return _gl.NEAREST_MIPMAP_LINEAR;\n\n    if (p === THREE.LinearFilter) return _gl.LINEAR;\n    if (p === THREE.LinearMipMapNearestFilter) return _gl.LINEAR_MIPMAP_NEAREST;\n    if (p === THREE.LinearMipMapLinearFilter) return _gl.LINEAR_MIPMAP_LINEAR;\n\n    if (p === THREE.UnsignedByteType) return _gl.UNSIGNED_BYTE;\n    if (p === THREE.UnsignedShort4444Type) return _gl.UNSIGNED_SHORT_4_4_4_4;\n    if (p === THREE.UnsignedShort5551Type) return _gl.UNSIGNED_SHORT_5_5_5_1;\n    if (p === THREE.UnsignedShort565Type) return _gl.UNSIGNED_SHORT_5_6_5;\n\n    if (p === THREE.ByteType) return _gl.BYTE;\n    if (p === THREE.ShortType) return _gl.SHORT;\n    if (p === THREE.UnsignedShortType) return _gl.UNSIGNED_SHORT;\n    if (p === THREE.IntType) return _gl.INT;\n    if (p === THREE.UnsignedIntType) return _gl.UNSIGNED_INT;\n    if (p === THREE.FloatType) return _gl.FLOAT;\n    if (p === THREE.HalfFloatType) return _isWebGL2 ? _gl.HALF_FLOAT : 0x8D61; //_gl.HALF_FLOAT_OES;\n\n    if (p === THREE.AlphaFormat) return _gl.ALPHA;\n    if (p === THREE.RGBFormat) return _gl.RGB;\n    if (p === THREE.RGBAFormat) return _gl.RGBA;\n    if (p === THREE.LuminanceFormat) return _gl.LUMINANCE;\n    if (p === THREE.LuminanceAlphaFormat) return _gl.LUMINANCE_ALPHA;\n\n    if (p === THREE.AddEquation) return _gl.FUNC_ADD;\n    if (p === THREE.MinEquation) return _gl.MIN;\n    if (p === THREE.MaxEquation) return _gl.MAX;\n    if (p === THREE.SubtractEquation) return _gl.FUNC_SUBTRACT;\n    if (p === THREE.ReverseSubtractEquation) return _gl.FUNC_REVERSE_SUBTRACT;\n\n    if (p === THREE.ZeroFactor) return _gl.ZERO;\n    if (p === THREE.OneFactor) return _gl.ONE;\n    if (p === THREE.SrcColorFactor) return _gl.SRC_COLOR;\n    if (p === THREE.OneMinusSrcColorFactor) return _gl.ONE_MINUS_SRC_COLOR;\n    if (p === THREE.SrcAlphaFactor) return _gl.SRC_ALPHA;\n    if (p === THREE.OneMinusSrcAlphaFactor) return _gl.ONE_MINUS_SRC_ALPHA;\n    if (p === THREE.DstAlphaFactor) return _gl.DST_ALPHA;\n    if (p === THREE.OneMinusDstAlphaFactor) return _gl.ONE_MINUS_DST_ALPHA;\n\n    if (p === THREE.DstColorFactor) return _gl.DST_COLOR;\n    if (p === THREE.OneMinusDstColorFactor) return _gl.ONE_MINUS_DST_COLOR;\n    if (p === THREE.SrcAlphaSaturateFactor) return _gl.SRC_ALPHA_SATURATE;\n\n    extension = extensions.get('WEBGL_compressed_texture_s3tc');\n\n    if (extension !== null) {\n\n      if (p === THREE.RGB_S3TC_DXT1_Format) return extension.COMPRESSED_RGB_S3TC_DXT1_EXT;\n      if (p === THREE.RGBA_S3TC_DXT1_Format) return extension.COMPRESSED_RGBA_S3TC_DXT1_EXT;\n      if (p === THREE.RGBA_S3TC_DXT3_Format) return extension.COMPRESSED_RGBA_S3TC_DXT3_EXT;\n      if (p === THREE.RGBA_S3TC_DXT5_Format) return extension.COMPRESSED_RGBA_S3TC_DXT5_EXT;\n\n    }\n\n    extension = extensions.get('WEBGL_compressed_texture_pvrtc');\n\n    if (extension !== null) {\n\n      if (p === THREE.RGB_PVRTC_4BPPV1_Format) return extension.COMPRESSED_RGB_PVRTC_4BPPV1_IMG;\n      if (p === THREE.RGB_PVRTC_2BPPV1_Format) return extension.COMPRESSED_RGB_PVRTC_2BPPV1_IMG;\n      if (p === THREE.RGBA_PVRTC_4BPPV1_Format) return extension.COMPRESSED_RGBA_PVRTC_4BPPV1_IMG;\n      if (p === THREE.RGBA_PVRTC_2BPPV1_Format) return extension.COMPRESSED_RGBA_PVRTC_2BPPV1_IMG;\n\n    }\n\n    extension = extensions.get('EXT_blend_minmax');\n\n    if (extension !== null) {\n\n      if (p === THREE.MinEquation) return extension.MIN_EXT;\n      if (p === THREE.MaxEquation) return extension.MAX_EXT;\n\n    }\n\n    return 0;\n\n  }\n\n  // Allocations\n\n  function allocateLights(lights) {\n\n    var dirLights = 0;\n    var pointLights = 0;\n    var spotLights = 0;\n    var hemiLights = 0;\n\n    for (var l = 0, ll = lights.length; l < ll; l++) {\n\n      var light = lights[l];\n\n      if (light.onlyShadow) continue;\n\n      if (light instanceof THREE.DirectionalLight) dirLights++;\n      if (light instanceof THREE.PointLight) pointLights++;\n      if (light instanceof THREE.SpotLight) spotLights++;\n      if (light instanceof THREE.HemisphereLight) hemiLights++;\n\n    }\n\n    return { 'directional': dirLights, 'point': pointLights, 'spot': spotLights, 'hemi': hemiLights };\n\n  }\n\n};","import * as THREE from \"three\";\n\nvar addLineNumbers = function addLineNumbers(code) {\n  var lines = code.split('\\n');\n  for (var i = 0; i < lines.length; i++) {\n    lines[i] = i + 1 + ': ' + lines[i];\n  }\n  return lines.join('\\n');\n};\n\nexport function WebGLShader(gl, type, code) {\n  var shader = gl.createShader(type);\n  gl.shaderSource(shader, code);\n  gl.compileShader(shader);\n  if (typeof DEBUG_SHADERS !== \"undefined\" && DEBUG_SHADERS) {\n    if (gl.getShaderParameter(shader, gl.COMPILE_STATUS) === false) {\n      THREE.error('THREE.WebGLShader: Shader couldn\\'t compile.');\n    }\n\n    if (gl.getShaderInfoLog(shader) !== '') {\n      THREE.warn('THREE.WebGLShader: gl.getShaderInfoLog()', gl.getShaderInfoLog(shader), addLineNumbers(code));\n    }\n  }\n\n  // --enable-privileged-webgl-extension\n  // THREE.log( type, gl.getExtension( 'WEBGL_debug_shaders' ).getTranslatedShaderSource( shader ) );\n  return shader;\n}","module.exports = \"#if NUM_CUTPLANES > 0\\nuniform vec4 cutplanes[NUM_CUTPLANES];\\nvoid checkCutPlanes(vec3 worldPosition) {\\n    for (int i=0; i<NUM_CUTPLANES; i++) {\\n        if (dot(vec4(worldPosition, 1.0), cutplanes[i]) > 0.0) {\\n            discard;\\n        }\\n    }\\n}\\n#endif\\n\";","module.exports = \"uniform float point_size;\";","module.exports = \"\\nuniform sampler2D tDepth;\\nuniform vec4 projInfo;\\nuniform float isOrtho;\\nuniform mat4 worldMatrix_mainPass;\\nvec3 reconstructCSPosition(vec2 fragCoords, float z) {\\n    return vec3((fragCoords * projInfo.xy + projInfo.zw) * mix(z, -1.0, isOrtho), z);\\n}\\nvec3 reconstructWorldPosition(vec2 fragCoords, vec2 screenUv) {\\n    float zCam = texture2D(tDepth, screenUv).z;\\n    vec3 csPos = reconstructCSPosition(fragCoords, zCam);\\n    return (worldMatrix_mainPass * vec4(csPos, 1.0)).xyz;\\n}\\n\";","module.exports = \"\\nuniform float envRotationSin;\\nuniform float envRotationCos;\\nvec3 adjustLookupVector(in vec3 lookup) {\\n    return vec3(\\n            envRotationCos * lookup.x - envRotationSin * lookup.z,\\n            lookup.y,\\n            envRotationSin * lookup.x + envRotationCos * lookup.z);\\n}\\nvec3 RGBMDecode(in vec4 vRGBM, in float exposure) {\\n    vec3 ret = vRGBM.rgb * (vRGBM.a * 16.0);\\n    ret *= ret;\\n    ret *= exposure;\\n    return ret;\\n}\\nvec3 GammaDecode(in vec4 vRGBA, in float exposure) {\\n    return vRGBA.xyz * vRGBA.xyz * exposure;\\n}\\nvec3 sampleIrradianceMap(vec3 dirWorld, samplerCube irrMap, float exposure) {\\n    vec4 cubeColor4 = textureCube(irrMap, adjustLookupVector(dirWorld));\\n#ifdef IRR_GAMMA\\n    vec3 indirectDiffuse = GammaDecode(cubeColor4, exposure);\\n#elif defined(IRR_RGBM)\\n    vec3 indirectDiffuse = RGBMDecode(cubeColor4, exposure);\\n#else\\n    vec3 indirectDiffuse = cubeColor4.xyz;\\n#ifdef GAMMA_INPUT\\n    indirectDiffuse.xyz *= indirectDiffuse.xyz;\\n#endif\\n#endif\\n    return indirectDiffuse;\\n}\\n\";","module.exports = \"#ifdef HATCH_PATTERN\\ngl_FragColor = calculateHatchPattern(hatchParams, gl_FragCoord.xy, gl_FragColor, hatchTintColor, hatchTintIntensity);\\n#endif\\n#ifdef MRT_NORMALS\\noutNormal = vec4(geomNormal.x, geomNormal.y, depth, gl_FragColor.a < 1.0 ? 0.0 : 1.0);\\n#endif\\n#include<id_frag>\\n\";","module.exports = \"float averageOfFloat3(in vec3 value) { \\n    const float oneThird = 1.0 / 3.0; \\n    return dot(value, vec3(oneThird, oneThird, oneThird)); \\n} \\n\";","module.exports = \"#ifdef HATCH_PATTERN\\nuniform vec2 hatchParams;\\nuniform vec3 hatchTintColor;\\nuniform float hatchTintIntensity;\\nfloat curveGaussian(float r, float invWidth) {\\n    float amt = clamp(r * invWidth, 0.0, 1.0);\\n    float exponent = amt * 3.5;\\n    return exp(-exponent*exponent);\\n}\\nvec4 calculateHatchPattern(vec2 hatchParams, vec2 coord, vec4 fragColor, vec3 hatchTintColor, float hatchTintIntensity ) {\\n    float hatchSlope = hatchParams.x;\\n    float hatchPeriod = hatchParams.y;\\n    if (abs(hatchSlope) <= 1.0) {\\n        float hatchPhase = coord.y - hatchSlope * coord.x;\\n        float dist = abs(mod((hatchPhase), (hatchPeriod)));\\n        if (dist < 1.0) {\\n            fragColor = vec4(0.0,0.0,0.0,1.0);\\n        } else {\\n            fragColor.xyz = mix(fragColor.xyz, hatchTintColor, hatchTintIntensity);\\n        }\\n    } else {\\n        float hatchPhase = - coord.y / hatchSlope + coord.x;\\n        float dist = abs(mod((hatchPhase), (hatchPeriod)));\\n        if (dist < 1.0) {\\n            fragColor = vec4(0.0,0.0,0.0,1.0);\\n        } else {\\n            fragColor.xyz = mix(fragColor.xyz, hatchTintColor, hatchTintIntensity);\\n        }\\n    }\\n    return fragColor;\\n}\\n#endif\\n\";","module.exports = \"vec3 rgb2hsv(vec3 color)\\n{\\n    float delta;\\n    float colorMax, colorMin;\\n    float h,s,v;\\n    vec3 hsv;\\n    colorMax = max(color.r,color.g);\\n    colorMax = max(colorMax,color.b);\\n    colorMin = min(color.r,color.g);\\n    colorMin = min(colorMin,color.b);\\n    v = colorMax;\\n    if(colorMax != 0.0)\\n    {\\n        s = (colorMax - colorMin)/colorMax;\\n    }\\n    else\\n    {\\n        s = 0.0;\\n    }\\n    if(s != 0.0)\\n    {\\n        delta = colorMax-colorMin;\\n        if (color.r == colorMax)\\n        {\\n            h = (color.g-color.b)/delta;\\n        }\\n        else if (color.g == colorMax)\\n        {\\n            h = 2.0 + (color.b-color.r) / delta;\\n        }\\n        else\\n        {\\n            h = 4.0 + (color.r-color.g)/delta;\\n        }\\n        h /= 6.0;\\n        if( h < 0.0)\\n        {\\n            h +=1.0;\\n        }\\n    }\\n    else\\n    {\\n        h = 0.0;\\n    }\\n    hsv = vec3(h,s,v);\\n    return hsv;\\n}\\nvec3 hsv2rgb(vec3 hsv)\\n{\\n    vec3 color;\\n    float f,p,q,t;\\n    float h,s,v;\\n    float i,hi;\\n    {\\n        h = hsv.x*6.0;\\n        s = hsv.y;\\n        v = hsv.z;\\n        i = floor(h);\\n        f = h-i;\\n        p = v * (1.0 - s);\\n        q = v * (1.0 - (s * f));\\n        t = v * (1.0 - (s * (1.0 - f)));\\n        float r,g,b;\\n        if (i == 0.0)\\n        {\\n            r = v;\\n            g = t;\\n            b = p;\\n        }\\n        else if (i == 1.0)\\n        {\\n            r = q;\\n            g = v;\\n            b = p;\\n        }\\n        else if (i == 2.0)\\n        {\\n            r = p;\\n            g = v;\\n            b = t;\\n        }\\n        else if (i == 3.0)\\n        {\\n            r = p;\\n            g = q;\\n            b = v;\\n        }\\n        else if (i == 4.0)\\n        {\\n            r = t;\\n            g = p;\\n            b = v;\\n        }\\n        else\\n        {\\n            r = v;\\n            g = p;\\n            b = q;\\n        }\\n        color = vec3(r,g,b);\\n    }\\n    return color;\\n}\";","module.exports = \"#if defined(MRT_NORMALS) || defined(MRT_ID_BUFFER)\\n    varying highp float depth;\\n#endif\\n#if defined(MRT_ID_BUFFER) || defined(ID_COLOR)\\n    #ifdef USE_VERTEX_ID\\n        varying vec3 vId;\\n    #elif defined(LINE_2D_SHADER)\\n        varying vec4 dbId;\\n    #else\\n        uniform vec3 dbId;\\n    #endif\\n#endif\\n#if defined(MRT_ID_BUFFER) || defined(MODEL_COLOR)\\n    uniform vec3 modelId;\\n#endif\\n#ifdef _LMVWEBGL2_\\n    #if defined(MRT_NORMALS)\\n        layout(location = 1) out vec4 outNormal;\\n        #if defined(MRT_ID_BUFFER)\\n            layout(location = 2) out vec4 outId;\\n            #if defined(MODEL_COLOR)\\n                layout(location = 3) out vec4 outModelId;\\n            #endif\\n        #endif\\n    #elif defined(MRT_ID_BUFFER)\\n        layout(location = 1) out vec4 outId;\\n        #if defined(MODEL_COLOR)\\n            layout(location = 2) out vec4 outModelId;\\n        #endif\\n    #endif\\n#else\\n    #define gl_FragColor gl_FragData[0]\\n    #if defined(MRT_NORMALS)\\n        #define outNormal gl_FragData[1]\\n        #if defined(MRT_ID_BUFFER)\\n            #define outId gl_FragData[2]\\n            #if defined(MODEL_COLOR)\\n                #define outModelId gl_FragData[3]\\n            #endif\\n        #endif\\n    #elif defined(MRT_ID_BUFFER)\\n        #define outId gl_FragData[1]\\n        #if defined(MODEL_COLOR)\\n            #define outModelId gl_FragData[2]\\n        #endif\\n    #endif\\n#endif\";","module.exports = \"#ifdef USE_VERTEX_ID\\nattribute vec3 id;\\nvarying   vec3 vId;\\n#endif\\n\";","module.exports = \"\\n#if defined(USE_VERTEX_ID) && (defined(MRT_ID_BUFFER) || defined(ID_COLOR))\\n    vec3 dbId = vId;\\n#endif\\n#ifdef MRT_ID_BUFFER\\n    #ifndef ENABLE_ID_DISCARD\\n        const float writeId = 1.0;\\n    #endif\\n    outId = vec4(dbId.rgb, writeId);\\n    #ifdef MODEL_COLOR\\n        outModelId = vec4(modelId.rgb, writeId);\\n    #endif\\n#elif defined(ID_COLOR)\\n    #ifdef ENABLE_ID_DISCARD\\n        if (writeId==0.0) {\\n            discard;\\n        }\\n    #endif\\n    gl_FragColor = vec4(dbId.rgb, 1.0);\\n#elif defined(MODEL_COLOR)\\n    #ifdef ENABLE_ID_DISCARD\\n        if (writeId==0.0) {\\n            discard;\\n        }\\n    #endif\\n    gl_FragColor = vec4(modelId.rgb, 1.0);\\n#endif\\n\";","module.exports = \"\\n#ifdef USE_VERTEX_ID\\nvId = id;\\n#endif\\n\";","module.exports = \"\\n#ifdef USE_INSTANCING\\nattribute vec3 instOffset;\\nattribute vec4 instRotation;\\nattribute vec3 instScaling;\\nvec3 applyQuaternion(vec3 p, vec4 q) {\\n    return p + 2.0 * cross(q.xyz, cross(q.xyz, p) + q.w * p);\\n}\\nvec3 getInstancePos(vec3 pos) {\\n    return instOffset + applyQuaternion(instScaling * pos, instRotation);\\n}\\nvec3 getInstanceNormal(vec3 normal) {\\n    return applyQuaternion(normal/instScaling, instRotation);\\n}\\n#else\\nvec3 getInstancePos(vec3 pos)       { return pos;    }\\nvec3 getInstanceNormal(vec3 normal) { return normal; }\\n#endif\\n\";","module.exports = \"\\n#define LINE_2D_SHADER 1\\n#define TAU     6.28318530718\\n#define PI      3.14159265358979\\n#define HALF_PI 1.57079632679\\n#define PI_0_5  HALF_PI\\n#define PI_1_5  4.71238898038\\n#define ENABLE_ID_DISCARD\\n#define VBB_GT_TRIANGLE_INDEXED  0.0\\n#define VBB_GT_LINE_SEGMENT      1.0\\n#define VBB_GT_ARC_CIRCULAR      2.0\\n#define VBB_GT_ARC_ELLIPTICAL    3.0\\n#define VBB_GT_TEX_QUAD          4.0\\n#define VBB_GT_ONE_TRIANGLE      5.0\\n#define VBB_GT_MSDF_TRIANGLE_INDEXED 6.0\\n#define VBB_INSTANCED_FLAG   0.0\\n#define VBB_SEG_START_RIGHT  0.0\\n#define VBB_SEG_START_LEFT   1.0\\n#define VBB_SEG_END_RIGHT    2.0\\n#define VBB_SEG_END_LEFT     3.0\\n#define LTSCALE 0.25\\nvarying vec4 fsColor;\\nvarying vec2 fsOffsetDirection;\\nvarying vec4 fsMultipurpose;\\nvarying float fsHalfWidth;\\nvarying vec2 fsVpTC;\\nvarying float fsGhosting;\\n#ifdef LOADING_ANIMATION\\nvarying float loadingProgress;\\n#endif\\n\";","module.exports = \"#if defined(USE_SURFACE_NORMAL_MAP) || defined( USE_LAYERED_NORMAL_MAP ) || defined( USE_TILING_NORMAL )\\nvoid heightMapTransform(\\n    sampler2D bumpTexture,\\n    vec2 uv,\\n    mat3 transform,\\n    vec2 bumpScale,\\n    inout vec3 T,\\n    inout vec3 B,\\n    inout vec3 N\\n) {\\n    vec2 st = (transform * vec3(uv, 1.0)).xy;\\n    mat3 mtxTangent = mat3(T, B, N);\\n    T = normalize(mtxTangent * (transform * vec3(1.0, 0.0, 0.0)));\\n    B = normalize(mtxTangent * (transform * vec3(0.0, 1.0, 0.0)));\\n    const float oneThird = 1.0 / 3.0;\\n    vec3 avg = vec3(oneThird, oneThird, oneThird);\\n    vec2 offset = fwidth(st);\\n    float h0 = dot(texture2D(bumpTexture, st).xyz, avg);\\n    float hx = dot(texture2D(bumpTexture, st + vec2(offset.x, 0.0)).xyz, avg);\\n    float hy = dot(texture2D(bumpTexture, st + vec2(0.0, offset.y)).xyz, avg);\\n    vec2 diff = vec2(h0 - hx, h0 - hy) / offset;\\n    N = normalize(\\n        N + (\\n            diff.x * T * bumpScale.x +\\n            diff.y * B * bumpScale.y\\n        )\\n    );\\n}\\nvoid normalMapTransform(\\n    sampler2D bumpTexture,\\n    vec2 uv,\\n    mat3 transform,\\n    vec2 bumpScale,\\n    inout vec3 T,\\n    inout vec3 B,\\n    inout vec3 N\\n) {\\n    vec2 st = (transform * vec3(uv, 1.0)).xy;\\n    vec3 mapN =  2.0 * texture2D(bumpTexture, st).xyz - 1.0;\\n    mapN.xy *= bumpScale.x;\\n    mapN.z *= bumpScale.y;\\n    vec3 v = vec3(mapN.y, -mapN.x, 0.0);\\n    float c = -mapN.z;\\n    mat3 skewV = mat3(\\n        0.0, v.z, -v.y,\\n        -v.z, 0.0, v.x,\\n        v.y, -v.x, 0.0\\n    );\\n    mat3 rot = mat3(1.0) + skewV + skewV*skewV * 1.0/(1.0-c);\\n    N *= rot;\\n    T *= rot;\\n    B *= rot;\\n}\\n#endif\\n\";","module.exports = \"vec3 orderedDithering(vec3 col) {\\n    const vec4 m0 = vec4( 1.0, 13.0,  4.0, 16.0);\\n    const vec4 m1 = vec4( 9.0,  5.0, 12.0,  8.0);\\n    const vec4 m2 = vec4( 3.0, 15.0,  2.0, 14.0);\\n    const vec4 m3 = vec4(11.0,  7.0, 10.0,  6.0);\\n    int i = int(mod(float(gl_FragCoord.x), 4.0));\\n    int j = int(mod(float(gl_FragCoord.y), 4.0));\\n    vec4 biasRow;\\n    if      (i==0) biasRow = m0;\\n    else if (i==1) biasRow = m1;\\n    else if (i==2) biasRow = m2;\\n    else           biasRow = m3;\\n    float bias;\\n    if      (j==0) bias = biasRow.x;\\n    else if (j==1) bias = biasRow.y;\\n    else if (j==2) bias = biasRow.z;\\n    else           bias = biasRow.w;\\n    return col + bias / 17.0 / 256.0;\\n}\\n\";","module.exports = \"\\nvec4 packDepth( const in float depth ) {\\n    vec4 enc = vec4(1.0, 255.0, 65025.0, 160581375.0) * depth;\\n    enc = fract(enc);\\n    enc -= enc.yzww * vec4(1.0/255.0,1.0/255.0,1.0/255.0,0.0);\\n    return enc;\\n}\\nfloat unpackDepth( const in vec4 rgba_depth ) {\\n    return dot( rgba_depth, vec4(1.0, 1.0/255.0, 1.0/65025.0, 1.0/160581375.0) );\\n}\\n\";","module.exports = \"\\n#define kPI 3.14159265358979\\nvec2 encodeNormal (vec3 n) {\\n    return (vec2(atan(n.y,n.x)/kPI, n.z)+1.0)*0.5;\\n}\\nvec3 decodeNormal (vec2 enc) {\\n    vec2 ang = enc * 2.0 - 1.0;\\n    vec2 scth = vec2(sin(ang.x * kPI), cos(ang.x * kPI));\\n    vec2 scphi = vec2(sqrt(1.0 - ang.y * ang.y), ang.y);\\n    return vec3(scth.y * scphi.x, scth.x * scphi.x, scphi.y);\\n}\\n\";","module.exports = \"gl_PointSize = point_size;\";","module.exports = \"\\nvec3 TransmitAdjust(vec3 transmission, vec3 f0) \\n{ \\n   vec3 limit = max(1.0 - f0, 0.00001); \\n   return clamp(transmission, vec3(0.0, 0.0, 0.0), limit) / limit; \\n} \\nfloat ColorToIlluminance(in vec3 color) \\n{ \\n   const vec3 rgb2grey = vec3(0.299, 0.587, 0.114); \\n   float illuminance = dot(rgb2grey, color); \\n   return illuminance; \\n} \\nvoid applyPrismGlazingOpacity(\\n    inout vec4 color,\\n    vec3 transmissionF,\\n    float transmissionAlpha,\\n    float NdotV,\\n    float glazingIlluminace) \\n{\\n    const float third = 1.0/3.0; \\n    float transSurface = exp(-(transmissionAlpha + (transmissionAlpha < 0.0025 ? 0.0 : 0.25)) * NdotV * PI); \\n    float opacity = 1.0- dot((1.0 - transmissionF), vec3(third,third,third)) * transSurface * glazingIlluminace; \\n    opacity = clamp(opacity, 0.01, 0.99);\\n    color.a *= opacity;\\n} \\n\";","module.exports = \"void applyPrismTransparency(\\n    inout vec4 color,\\n    vec3 transparentColor,\\n    float transparentIor\\n) {\\n    float fsLevel = max(max(color.r, color.g), color.b);\\n    color = vec4(color.rgb/fsLevel, fsLevel);\\n    float transLevel = min(min(transparentColor.r, transparentColor.g), transparentColor.b);\\n    transLevel = min( (1.0 - surface_roughness), transLevel );\\n    float transAlpha = (1.0 - transLevel) * 0.4 + surface_roughness * 0.55;\\n    vec3 tr_g_color = sqrt(transparentColor);\\n    vec4 transColor = vec4(0.5 * vec3(tr_g_color), transAlpha);\\n    float strength = 1.0 - (1.0 - fsLevel) * (1.0 - fsLevel);\\n    color = mix(transColor, color, strength);\\n    color.a = max(color.a, 0.05);\\n    if (transparentIor == 1.0 && tr_g_color == vec3(1.0)) {\\n        color.a = 0.0;\\n    }\\n}\";","module.exports = \"#if defined( PRISMWOOD )\\n#define ONE 0.00390625\\nfloat GetIndexedValue(vec4 array, int index)\\n{\\n    if (index == 0)\\n        return array[0];\\n    else if (index == 1)\\n        return array[1];\\n    else if (index == 2)\\n        return array[2];\\n    else if (index == 3)\\n        return array[3];\\n    else\\n        return 0.0;\\n}\\nint GetIndexedValue(ivec2 array, int index)\\n{\\n    if (index == 0)\\n        return array[0];\\n    else if (index == 1)\\n        return array[1];\\n    else\\n        return 0;\\n}\\n#if defined( USE_WOOD_CURLY_DISTORTION_MAP )\\nfloat SampleCurlyPattern(vec2 uv)\\n{\\n    vec2 uv_wood_curly_distortion_map = (wood_curly_distortion_map_texMatrix * vec3(uv, 1.0)).xy;\\n    WOOD_CURLY_DISTORTION_CLAMP_TEST;\\n    vec3 curlyDistortion = texture2D(wood_curly_distortion_map, uv_wood_curly_distortion_map).xyz;\\n    if(wood_curly_distortion_map_invert) curlyDistortion = vec3(1.0) - curlyDistortion;\\n    return curlyDistortion.r;\\n}\\nvec3 DistortCurly(vec3 p)\\n{\\n    if (!wood_curly_distortion_enable) return p;\\n    float r = length(p.xy);\\n    if (r < 0.00001) return p;\\n    const float INV_ANGLE_INTERVAL = 1.27323954;\\n    const float NUM_INTERVAL = 8.0;\\n    float theta = atan(p.y, p.x);\\n    if (theta < 0.0)\\n        theta += PI2;\\n    float intIdx = theta * INV_ANGLE_INTERVAL;\\n    int idx0 = int(mod(floor(intIdx), NUM_INTERVAL));\\n    int idx1 = int(mod(ceil(intIdx), NUM_INTERVAL));\\n    const vec4 HASH_TABLE1 = vec4(0.450572,0.114598, 0.886043, 0.315119);\\n    const vec4 HASH_TABLE2 = vec4(0.216133,0.306264, 0.685616, 0.317907);\\n    float offset0 = idx0 < 4 ? GetIndexedValue(HASH_TABLE1, idx0) : GetIndexedValue(HASH_TABLE2, idx0-4);\\n    float offset1 = idx1 < 4 ? GetIndexedValue(HASH_TABLE1, idx1) : GetIndexedValue(HASH_TABLE2, idx1-4);\\n    const float maxOffset = 100.0;\\n    offset0 = (offset0 - 0.5) * maxOffset;\\n    offset1 = (offset1 - 0.5) * maxOffset;\\n    vec2 uv0 = vec2(p.z + offset0, r);\\n    float shiftWeight0 =  SampleCurlyPattern(uv0);\\n    vec2 uv1 = vec2(p.z + offset1, r);\\n    float shiftWeight1 =  SampleCurlyPattern(uv1);\\n    float interpWeight = fract(intIdx);\\n    float shiftWeight = mix(shiftWeight0, shiftWeight1, interpWeight);\\n    const float INV_MIN_RADIUS = 2.0;\\n    float shiftWeightAdjust = smoothstep(0.0, 1.0, r * INV_MIN_RADIUS);\\n    r -= wood_curly_distortion_scale * (shiftWeight * shiftWeightAdjust);\\n    float thetaNew = atan(p.y, p.x);\\n    vec3 pNew = p;\\n    pNew.x = r * cos(thetaNew);\\n    pNew.y = r * sin(thetaNew);\\n    return pNew;\\n}\\n#endif\\nvec3 un2sn(vec3 range)\\n{\\n    return range * 2.0 - 1.0;\\n}\\nfloat inoise(vec3 p)\\n{\\n    vec3 modp = mod(floor(p), 256.0);\\n    modp.xy = modp.xy * ONE;\\n    vec4 AA = texture2D(perm2DMap, vec2(modp.x, modp.y), 0.0) * 255.0;\\n    AA = AA + modp.z;\\n    AA = mod(floor(AA), 256.0);\\n    AA *= ONE;\\n    vec3 gradx1 = un2sn(texture2D(permGradMap,vec2(AA.x,0.0),0.0).xyz);\\n    vec3 grady1 = un2sn(texture2D(permGradMap,vec2(AA.y,0.0),0.0).xyz);\\n    vec3 gradz1 = un2sn(texture2D(permGradMap,vec2(AA.z,0.0),0.0).xyz);\\n    vec3 gradw1 = un2sn(texture2D(permGradMap,vec2(AA.w,0.0),0.0).xyz);\\n    vec3 gradx2 = un2sn(texture2D(permGradMap,vec2(AA.x + ONE,0.0),0.0).xyz);\\n    vec3 grady2 = un2sn(texture2D(permGradMap,vec2(AA.y + ONE,0.0),0.0).xyz);\\n    vec3 gradz2 = un2sn(texture2D(permGradMap,vec2(AA.z + ONE,0.0),0.0).xyz);\\n    vec3 gradw2 = un2sn(texture2D(permGradMap,vec2(AA.w + ONE,0.0),0.0).xyz);\\n    p -= floor(p);\\n    vec3 fadep = p * p * p * (p * (p * 6.0 - 15.0) + 10.0);\\n    return mix( mix( mix( dot(gradx1, p ),\\n                          dot(gradz1, p + vec3(-1.0, 0.0, 0.0)), fadep.x),\\n                     mix( dot(grady1, p + vec3(0.0, -1.0, 0.0)),\\n                          dot(gradw1, p + vec3(-1.0, -1.0, 0.0)), fadep.x), fadep.y),\\n                mix( mix( dot(gradx2, p + vec3(0.0, 0.0, -1.0)),\\n                          dot(gradz2, p + vec3(-1.0, 0.0, -1.0)), fadep.x),\\n                     mix( dot(grady2, p + vec3(0.0, -1.0, -1.0)),\\n                          dot(gradw2, p + vec3(-1.0, -1.0, -1.0)), fadep.x), fadep.y), fadep.z);\\n}\\nfloat inoise(float p)\\n{\\n    float modp = mod(floor(p), 256.0);\\n    modp = (modp + 256.0) * ONE;\\n    float permx = texture2D(permutationMap, vec2(modp, 0.0), 0.0).r;\\n    float gradx = texture2D(gradientMap, vec2(permx, 0.0), 0.0).r*2.0-1.0;\\n    float permy = texture2D(permutationMap, vec2(modp + ONE, 0.0), 0.0).r;\\n    float grady = texture2D(gradientMap, vec2(permy, 0.0), 0.0).r*2.0-1.0;\\n    p -= floor(p);\\n    float fadep = p * p * p * (p * (p * 6.0 - 15.0) + 10.0);\\n    return mix(gradx * p, grady * (p - 1.0), fadep);\\n}\\nfloat multiband_inoise(vec3 p, int bands, vec4 w, vec4 f)\\n{\\n    float noise = 0.0;\\n    for(int i = 0; i < 4; ++i)\\n    {\\n        if (i >= bands) break;\\n        noise += GetIndexedValue(w, i) * inoise(p * GetIndexedValue(f, i));\\n    }\\n    return noise;\\n}\\nfloat multiband_inoise(float p, int bands, vec4 w, vec4 f)\\n{\\n    float noise = 0.0;\\n    for(int i = 0; i < 4; ++i)\\n    {\\n        if (i >= bands) break;\\n        noise += GetIndexedValue(w, i) * inoise(p * GetIndexedValue(f, i));\\n    }\\n    return noise;\\n}\\nvec3 Distort3DCosineRadialDir(vec3 p)\\n{\\n    float radius = length(p.xy);\\n    if (radius < 0.00001) return p;\\n    vec2 theta = p.xy / radius;\\n    float radiusShift = 0.0;\\n    for (int i = 0; i < 4; ++i)\\n    {\\n        if (i >= wood_fiber_cosine_bands) break;\\n        radiusShift += GetIndexedValue(wood_fiber_cosine_weights, i) * cos(p.z * RECIPROCAL_PI2 * GetIndexedValue(wood_fiber_cosine_frequencies, i));\\n    }\\n    const float MIN_RADIUS = 1.5;\\n    float weight = clamp(radius / MIN_RADIUS, 0.0, 1.0);\\n    if(weight >= 0.5)\\n        weight = weight * weight * (3.0 - (weight + weight));\\n    p.xy += theta * radiusShift * weight;\\n    return p;\\n}\\nvec3 Distort3DPerlin(vec3 p)\\n{\\n    vec3 pAniso = vec3(p.xy, p.z * wood_fiber_perlin_scale_z);\\n    p.xy += multiband_inoise(pAniso, wood_fiber_perlin_bands, wood_fiber_perlin_weights, wood_fiber_perlin_frequencies);\\n    return p;\\n}\\nvec3 Distort(vec3 p)\\n{\\n    if(wood_fiber_cosine_enable)\\n        p = Distort3DCosineRadialDir(p);\\n    if(wood_fiber_perlin_enable)\\n        p = Distort3DPerlin(p);\\n    return p;\\n}\\nfloat DistortRadiusLength(float radiusLength)\\n{\\n    radiusLength += multiband_inoise(radiusLength, wood_growth_perlin_bands, wood_growth_perlin_weights, wood_growth_perlin_frequencies);\\n    if (radiusLength < 0.0) radiusLength = 0.0;\\n    return radiusLength;\\n}\\nfloat ComputeEarlyWoodRatio(float radiusLength)\\n{\\n    float fraction = mod(radiusLength, wood_ring_thickness) / wood_ring_thickness;\\n    if (fraction <= wood_ring_fraction.y)\\n       return 1.0;\\n    else if(fraction <= wood_ring_fraction.x)\\n       return (1.0 - (fraction - wood_ring_fraction.y) / wood_fall_rise.x);\\n    else if(fraction <= wood_ring_fraction.w)\\n       return 0.0;\\n    else\\n       return ((fraction - wood_ring_fraction.w) / wood_fall_rise.y);\\n}\\nvec3 DistortEarlyColor(vec3 earlyColor, float radiusLength)\\n{\\n    float expValue = 1.0 + multiband_inoise(radiusLength,wood_earlycolor_perlin_bands,wood_earlycolor_perlin_weights,wood_earlycolor_perlin_frequencies);\\n    earlyColor = pow(abs(earlyColor), vec3(expValue));\\n    return earlyColor;\\n}\\nvec3 DistortLateColor(vec3 lateColor, float radiusLength)\\n{\\n    float expValue = 1.0 + multiband_inoise(radiusLength,wood_latecolor_perlin_bands,wood_latecolor_perlin_weights,wood_latecolor_perlin_frequencies);\\n    lateColor = pow(abs(lateColor), vec3(expValue));\\n    return lateColor;\\n}\\nvec3 DistortDiffuseColor(vec3 diffAlbedo, vec3 p)\\n{\\n    p.z *= wood_diffuse_perlin_scale_z;\\n    float expValue = 1.0 + multiband_inoise(p, wood_diffuse_perlin_bands, wood_diffuse_perlin_weights, wood_diffuse_perlin_frequencies);\\n    diffAlbedo = pow(abs(diffAlbedo), vec3(expValue));\\n    return diffAlbedo;\\n}\\nfloat LayerRoughnessVar(float roughness, float earlyWoodRatio)\\n{\\n    return earlyWoodRatio * wood_groove_roughness + (1.0 - earlyWoodRatio) * roughness;\\n}\\nfloat hashword(vec2 k)\\n{\\n    k = mod(k, vec2(256.0)) * ONE;\\n    float a = texture2D(permutationMap, vec2(k.x, 0.0)).x + k.y ;\\n    a = texture2D(permutationMap, vec2(a, 0.0)).x ;\\n    return a*255.0;\\n}\\nfloat wyvillsq(float rsq)\\n{\\n    if (rsq >= 1.0) return 0.0;\\n    float tmp = 1.0 - rsq;\\n    return tmp*tmp*tmp;\\n}\\nfloat Weight2DNeighborImpulses(vec3 p, float woodWeight)\\n{\\n    if(woodWeight <= 0.0) return 0.0;\\n    float poreRadius = wood_pore_radius * woodWeight;\\n    vec2 left = floor((p.xy - poreRadius) / wood_pore_cell_dim);\\n    vec2 right = floor((p.xy + poreRadius) / wood_pore_cell_dim);\\n    float weight = 0.0;\\n    float invRsq = 1.0 / (poreRadius * poreRadius);\\n    const float norm =  1.0 / 15.0;\\n    for (int j = 0; j <= 4; j++)\\n    {\\n        if (j > int(right.y - left.y)) continue;\\n        for (int i = 0; i <= 4; i++)\\n        {\\n            if (i > int(right.x - left.x)) continue;\\n            vec2 pij = vec2(float(i) + left.x,float(j) + left.y);\\n            float hRNum = hashword(pij);\\n            float impPosX = mod(hRNum, 16.0) * norm;\\n            float impPosY = floor(hRNum / 16.0) * norm;\\n            impPosX = (pij.x + impPosX)* wood_pore_cell_dim;\\n            impPosY = (pij.y + impPosY)* wood_pore_cell_dim;\\n            float dsq = (p.x - impPosX) * (p.x - impPosX) + (p.y - impPosY) * (p.y - impPosY);\\n            weight += wyvillsq(dsq * invRsq);\\n        }\\n    }\\n    return weight;\\n}\\nfloat Weight3DRayImpulses(vec3 p)\\n{\\n    int segIdx = int(floor(p.z / wood_ray_seg_length_z));\\n    float factor = p.z / wood_ray_seg_length_z - float(segIdx);\\n    int segIdx1 = segIdx - 1;\\n    if ( factor > 0.5 )\\n        segIdx1 = segIdx + 1;\\n    float theta = atan(p.y, p.x);\\n    float sliceIdx = floor(((theta + PI) * RECIPROCAL_PI2) * wood_ray_num_slices);\\n    if ( sliceIdx == wood_ray_num_slices)\\n        sliceIdx-=1.0;\\n    ivec2 arrSegs = ivec2(segIdx, segIdx1);\\n    float weight = 0.0;\\n    const float norm =  1.0 / 15.0;\\n    float radialOffset = 5.0;\\n    float radialLength = length(p.xy);\\n    for (int seg = 0; seg < 2; seg++)\\n    {\\n        float hRNum = hashword(vec2(sliceIdx, GetIndexedValue(arrSegs, seg)));\\n        float rn1 = mod(hRNum,16.0) * norm;\\n        if (radialLength < radialOffset * rn1)\\n            continue;\\n        float rayTheta = rn1;\\n        rayTheta = ( ( sliceIdx + rayTheta ) / wood_ray_num_slices ) * ( 2.0 * PI ) - PI;\\n        float rayPosZ = (hRNum/16.0)* norm;\\n        rayPosZ = ( float(GetIndexedValue(arrSegs, seg)) + rayPosZ ) * wood_ray_seg_length_z;\\n        vec3 pt1 = vec3(0.0);\\n        vec3 pt2 = vec3(cos(rayTheta), sin(rayTheta), 0.0);\\n        vec3 p1 = p;\\n        p1.z -= rayPosZ;\\n        p1.z /=  wood_ray_ellipse_z2x;\\n        vec3 v1 = pt2 - pt1;\\n        vec3 v2 = pt1 - p1;\\n        v2 = cross(v1, v2);\\n        float dist = length(v2) / length(v1);\\n        float invRsq = 1.0 / ( wood_ray_ellipse_radius_x * wood_ray_ellipse_radius_x);\\n        weight += wyvillsq( (dist * dist) * invRsq );\\n    }\\n    return weight;\\n}\\nvec3 DarkenColorWithPores(vec3 p, vec3 diffColor, float woodWeight)\\n{\\n    float poresWeight = Weight2DNeighborImpulses(p, woodWeight);\\n    float a = wood_pore_color_power - 1.0;\\n    float b = 1.0;\\n    float y = a * poresWeight + b;\\n    return pow(abs(diffColor), vec3(y));\\n}\\nvec3 DarkenColorWithRays(vec3 p, vec3 diffColor)\\n{\\n    float raysWeight = Weight3DRayImpulses(p);\\n    float a = wood_ray_color_power - 1.0;\\n    float b = 1.0;\\n    float y = a * raysWeight + b;\\n    return pow(abs(diffColor), vec3(y));\\n}\\nfloat ComputeWoodWeight(float earlyWoodRatio)\\n{\\n    float woodWeight = 0.0;\\n    if (wood_pore_type == 0)\\n        woodWeight = 1.0;\\n    else if (wood_pore_type == 1)\\n        woodWeight = earlyWoodRatio;\\n    else if (wood_pore_type == 2)\\n        woodWeight = 1.0 - earlyWoodRatio;\\n    else\\n        woodWeight = -1.0;\\n    return woodWeight;\\n}\\n#if defined( PRISMWOODBUMP )\\nfloat ComputeEarlyWoodRatioAA(float radiusLength, float invUnitExt)\\n{\\n    float transPixels = min(wood_fall_rise.x, wood_fall_rise.y) * wood_ring_thickness * invUnitExt;\\n    float samplesf = clamp(4.0 / transPixels, 1.0, 4.0);\\n    int samples = int(samplesf);\\n    float inverseSamples = 1.0 / float(samples);\\n    vec2 rdelta = vec2(dFdx(radiusLength), dFdy(radiusLength)) * inverseSamples;\\n    float earlywoodRatio = 0.0;\\n    for (int i = 0; i < 4; ++i)\\n    {\\n        if (i >= samples) break;\\n        for (int j = 0; j < 4; ++j)\\n        {\\n            if (j >= samples) break;\\n            float r = radiusLength + dot(vec2(i, j), rdelta);\\n            earlywoodRatio += ComputeEarlyWoodRatio(r);\\n        }\\n    }\\n    return earlywoodRatio * (inverseSamples * inverseSamples);\\n}\\nfloat LatewoodDepthVariation(float invUnitExt)\\n{\\n    float transPixels = min(wood_fall_rise.x, wood_fall_rise.y) * wood_ring_thickness * invUnitExt;\\n    return clamp(transPixels * 0.5, 0.0, 1.0);\\n}\\nfloat LatewoodHeightVariation(float earlyWoodRatio, float latewoodBumpDepth,\\n                              float depthVar)\\n{\\n    return ( 1.0 - earlyWoodRatio ) * latewoodBumpDepth * depthVar;\\n}\\nfloat PoreDepthVariation(float woodWeight, float invUnitExt)\\n{\\n    float porePixels = woodWeight * wood_pore_radius * invUnitExt;\\n    return clamp(porePixels, 0.0, 1.0);\\n}\\nfloat PoreHeightVariation(float earlyWoodRatio, float poresWeight, float poreDepth,\\n                          float depthVar)\\n{\\n    return poresWeight * (-1.0 * poreDepth) * depthVar;\\n}\\nvoid ComputeTangents(vec3 normal, out vec3 u, out vec3 v)\\n{\\n    float scale = normal.z < 0.0 ? -1.0 : 1.0;\\n    vec3 temp = scale * normal;\\n    float e    = temp.z;\\n    float h    = 1.0/(1.0 + e);\\n    float hvx  = h   *  temp.y;\\n    float hvxy = hvx * -temp.x;\\n    u = vec3(e + hvx * temp.y, hvxy,                -temp.x);\\n    v = vec3(hvxy,             e + h * temp.x * temp.x, -temp.y);\\n    u *= scale;\\n    v *= scale;\\n}\\nvec3 WoodBumpHeight(float heightLeft, float heightRight, float heightBack, float heightFront)\\n{\\n    const float epsilon = 0.001;\\n    float heightDeltaX = heightRight - heightLeft;\\n    vec3 Tu = vec3(2.0 * epsilon, 0.0, heightDeltaX);\\n    float heightDeltaY = heightFront - heightBack;\\n    vec3 Tv = vec3(0.0, 2.0 * epsilon, heightDeltaY);\\n    return cross(Tu, Tv);\\n}\\nvec3 SelectNormal(vec3 N, vec3 bumpN, vec3 V)\\n{\\n    float bumpNdotV = dot(bumpN, V);\\n    if(bumpNdotV > 0.0)\\n        return bumpN;\\n    else return N;\\n}\\nfloat MinInverseUnitExtent(vec3 p)\\n{\\n    return 1.0 / max(max(length(dFdx(p.xy)), length(dFdy(p.xy))), 0.000001);\\n}\\nfloat HeightVariation(vec3 pos)\\n{\\n    vec3 p = Distort(pos);\\n    float radiusLength = length(p.xy);\\n    if (wood_growth_perlin_enable)\\n        radiusLength = DistortRadiusLength(radiusLength);\\n    float invUnitExt = MinInverseUnitExtent(p);\\n    float earlyWoodRatio = ComputeEarlyWoodRatioAA(radiusLength, invUnitExt);\\n    float woodWeight = ComputeWoodWeight(earlyWoodRatio);\\n    float poresWeight = Weight2DNeighborImpulses(p, woodWeight);\\n    float depthVar = PoreDepthVariation(woodWeight, invUnitExt);\\n    float poreHeightVariation = -1.0 * poresWeight * wood_pore_depth * depthVar;\\n    float latewoodHeightVariation = 0.0;\\n    if (wood_use_latewood_bump)\\n    {\\n        float latewoodDepthVar = LatewoodDepthVariation(invUnitExt);\\n        latewoodHeightVariation = (1.0 - earlyWoodRatio) * wood_latewood_bump_depth * latewoodDepthVar;\\n    }\\n    float sumHeightVariation = poreHeightVariation + latewoodHeightVariation;\\n    return sumHeightVariation;\\n}\\n#endif\\nvec3 NoiseWood(vec3 p, inout float roughness)\\n{\\n    p = Distort(p);\\n    float radiusLength = length(p.xy);\\n    if(wood_growth_perlin_enable)\\n        radiusLength = DistortRadiusLength(radiusLength);\\n#if defined( PRISMWOODBUMP )\\n    float invUnitExt = MinInverseUnitExtent( p );\\n    float earlyWoodRatio = ComputeEarlyWoodRatioAA(radiusLength, invUnitExt);\\n#else\\n    float earlyWoodRatio = ComputeEarlyWoodRatio(radiusLength);\\n#endif\\n    vec3 earlyColor = wood_early_color;\\n    if (wood_earlycolor_perlin_enable)\\n        earlyColor = DistortEarlyColor(earlyColor, radiusLength);\\n    vec3 lateColor;\\n    if (wood_use_manual_late_color)\\n        lateColor = wood_manual_late_color;\\n    else\\n        lateColor = pow(abs(earlyColor), vec3(wood_late_color_power));\\n    if(wood_latecolor_perlin_enable)\\n        lateColor = DistortLateColor(lateColor, radiusLength);\\n    vec3 diffAlbedo = earlyWoodRatio * earlyColor + (1.0 - earlyWoodRatio) * lateColor;\\n    if(wood_diffuse_perlin_enable)\\n        diffAlbedo = DistortDiffuseColor(diffAlbedo, p);\\n    if (wood_use_pores)\\n    {\\n        float woodWeight = ComputeWoodWeight(earlyWoodRatio);\\n        diffAlbedo = DarkenColorWithPores(p, diffAlbedo, woodWeight);\\n    }\\n    if (wood_use_rays)\\n        diffAlbedo = DarkenColorWithRays(p, diffAlbedo);\\n    if(wood_use_groove_roughness)\\n        roughness = LayerRoughnessVar(roughness, earlyWoodRatio);\\n    return clamp(diffAlbedo, vec3(0.0), vec3(1.0));\\n}\\n#if defined(PRISMWOODBUMP)\\nvoid getFinalWoodContext(\\n    inout vec3 N, vec3 V, inout vec3 Tu, inout vec3 Tv, vec3 p,\\n    vec3 geoNormal, vec3 tNormal, mat3 normalMatrix\\n) {\\n    vec3 offsetTuLeft = p - 0.001 * Tu;\\n    vec3 offsetTuRight = p + 0.001 * Tu;\\n    vec3 offsetTvLeft = p - 0.001 * Tv;\\n    vec3 offsetTvRight = p + 0.001 * Tv;\\n    float heightVariationTuLeft = HeightVariation(offsetTuLeft);\\n    float heightVariationTuRight = HeightVariation(offsetTuRight);\\n    float heightVariationTvLeft = HeightVariation(offsetTvLeft);\\n    float heightVariationTvRight = HeightVariation(offsetTvRight);\\n    vec3 bumpHeight = WoodBumpHeight(heightVariationTuLeft, heightVariationTuRight, heightVariationTvLeft, heightVariationTvRight);\\n    vec3 newNormal = normalize(bumpHeight.x * Tu + bumpHeight.y * Tv + bumpHeight.z * vtNormal);\\n    vec3 newNormalView = normalize(vNormalMatrix * newNormal);\\n    vec3 selectedNormal = SelectNormal(geoNormal, newNormalView, V);\\n    ComputeTangents(selectedNormal, Tu, Tv);\\n    Tu = normalize(Tu);\\n    Tv = normalize(Tv);\\n    N = faceforward(selectedNormal, -V, selectedNormal);\\n}\\n#endif\\n#endif\\n\";","module.exports = \"\\nuniform float shadowESMConstant;\\nuniform float shadowMapRangeMin;\\nuniform float shadowMapRangeSize;\\n\";","module.exports = \"\\n#ifdef USE_SHADOWMAP\\nuniform sampler2D shadowMap;\\nuniform vec2      shadowMapSize;\\nuniform float     shadowDarkness;\\nuniform float     shadowBias;\\nuniform vec3      shadowLightDir;\\nvarying vec4 vShadowCoord;\\n#include<shadowmap_decl_common>\\nfloat getShadowValue() {\\n    float fDepth;\\n    vec3 shadowColor = vec3( 1.0 );\\n    vec3 shadowCoord = vShadowCoord.xyz / vShadowCoord.w;\\n    shadowCoord.xyz = 0.5 * (shadowCoord.xyz + vec3(1.0, 1.0, 1.0));\\n    bvec4 inFrustumVec = bvec4 ( shadowCoord.x >= 0.0, shadowCoord.x <= 1.0, shadowCoord.y >= 0.0, shadowCoord.y <= 1.0 );\\n    bool inFrustum = all( inFrustumVec );\\n    float shadowValue = 1.0;\\n    if (inFrustum) {\\n        shadowCoord.z = min(0.999, shadowCoord.z);\\n        shadowCoord.z -= shadowBias;\\n#ifdef USE_HARD_SHADOWS\\n        vec4 rgbaDepth = texture2D( shadowMap, shadowCoord.xy );\\n        float fDepth = rgbaDepth.r;\\n        if ( fDepth < shadowCoord.z ) {\\n            shadowValue = 1.0 - shadowDarkness;\\n        }\\n#else\\n        vec4 rgbaDepth = texture2D( shadowMap, shadowCoord.xy );\\n        float shadowMapValue = rgbaDepth.r;\\n        shadowValue = exp(-shadowESMConstant * shadowCoord.z) * shadowMapValue;\\n        shadowValue = min(shadowValue, 1.0);\\n        shadowValue = mix(1.0 - shadowDarkness, 1.0, shadowValue);\\n#endif\\n    }\\n    return shadowValue;\\n}\\n#else\\nfloat getShadowValue() { return 1.0; }\\n#endif\\nvec3 applyEnvShadow(vec3 colorWithoutShadow, vec3 worldNormal) {\\n#if defined(USE_SHADOWMAP)\\n    float dp  = dot(shadowLightDir, worldNormal);\\n    float dpValue = (dp + 1.0) / 2.0;\\n    dpValue = min(1.0, dpValue * 1.5);\\n    float sv = getShadowValue();\\n    vec3 result = colorWithoutShadow * min(sv, dpValue);\\n    return result;\\n#else\\n    return colorWithoutShadow;\\n#endif\\n}\\n\";","module.exports = \"\\n#ifdef USE_SHADOWMAP\\nvarying vec4 vShadowCoord;\\nuniform mat4 shadowMatrix;\\n#endif\\n\";","module.exports = \"\\n#ifdef USE_SHADOWMAP\\n{\\n    vec4 worldPosition = modelMatrix * vec4( position, 1.0 );\\n    vShadowCoord = shadowMatrix * worldPosition;\\n}\\n#endif\\n\";","module.exports = \"uniform vec4 themingColor;\\n\";","module.exports = \"gl_FragColor.rgb = mix(gl_FragColor.rgb, themingColor.rgb, themingColor.a);\\n\";","module.exports = \"\\nfloat luminance_post(vec3 rgb) {\\n    return dot(rgb, vec3(0.299, 0.587, 0.114));\\n}\\nfloat luminance_pre(vec3 rgb) {\\n    return dot(rgb, vec3(0.212671, 0.715160, 0.072169));\\n}\\nvec3 xyz2rgb(vec3 xyz) {\\n    vec3 R = vec3( 3.240479, -1.537150, -0.498535);\\n    vec3 G = vec3(-0.969256,  1.875992,  0.041556);\\n    vec3 B = vec3( 0.055648, -0.204043,  1.057311);\\n    vec3 rgb;\\n    rgb.b = dot(xyz, B);\\n    rgb.g = dot(xyz, G);\\n    rgb.r = dot(xyz, R);\\n    return rgb;\\n}\\nvec3 rgb2xyz(vec3 rgb) {\\n    vec3 X = vec3(0.412453, 0.35758, 0.180423);\\n    vec3 Y = vec3(0.212671, 0.71516, 0.0721688);\\n    vec3 Z = vec3(0.0193338, 0.119194, 0.950227);\\n    vec3 xyz;\\n    xyz.x = dot(rgb, X);\\n    xyz.y = dot(rgb, Y);\\n    xyz.z = dot(rgb, Z);\\n    return xyz;\\n}\\nvec3 xyz2xyY(vec3 xyz) {\\n    float sum = xyz.x + xyz.y + xyz.z;\\n    sum = 1.0 / sum;\\n    vec3 xyY;\\n    xyY.z = xyz.y;\\n    xyY.x = xyz.x * sum;\\n    xyY.y = xyz.y * sum;\\n    return xyY;\\n}\\nvec3 xyY2xyz(vec3 xyY) {\\n    float x = xyY.x;\\n    float y = xyY.y;\\n    float Y = xyY.z;\\n    vec3 xyz;\\n    xyz.y = Y;\\n    xyz.x = x * (Y / y);\\n    xyz.z = (1.0 - x - y) * (Y / y);\\n    return xyz;\\n}\\nfloat toneMapCanon_T(float x)\\n{\\n    float xpow = pow(x, 1.60525727);\\n    float tmp = ((1.05542877*4.68037409)*xpow) / (4.68037409*xpow + 1.0);\\n    return clamp(tmp, 0.0, 1.0);\\n}\\nconst float Shift = 1.0 / 0.18;\\nfloat toneMapCanonFilmic_NoGamma(float x) {\\n    x *= Shift;\\n    const float A = 0.2;\\n    const float B = 0.34;\\n    const float C = 0.002;\\n    const float D = 1.68;\\n    const float E = 0.0005;\\n    const float F = 0.252;\\n    const float scale = 1.0/0.833837;\\n    return (((x*(A*x+C*B)+D*E)/(x*(A*x+B)+D*F))-E/F) * scale;\\n}\\nvec3 toneMapCanonFilmic_WithGamma(vec3 x) {\\n    x *= Shift;\\n    const float A = 0.27;\\n    const float B = 0.29;\\n    const float C = 0.052;\\n    const float D = 0.2;\\n    const float F = 0.18;\\n    const float scale = 1.0/0.897105;\\n    return (((x*(A*x+C*B))/(x*(A*x+B)+D*F))) * scale;\\n}\\nvec3 toneMapCanonOGS_WithGamma_WithColorPerserving(vec3 x) {\\n    vec3 outColor = x.rgb;\\n    outColor = min(outColor, vec3(3.0));\\n    float inLum = luminance_pre(outColor);\\n    if (inLum > 0.0) {\\n        float outLum = toneMapCanon_T(inLum);\\n        outColor = outColor * (outLum / inLum);\\n        outColor = clamp(outColor, vec3(0.0), vec3(1.0));\\n    }\\n    float gamma = 1.0/2.2;\\n    outColor = pow(outColor, vec3(gamma));\\n    return outColor;\\n}\\n\";","module.exports = \"\\n#ifdef WIDE_LINES\\nattribute vec3 prev;\\nattribute vec3 next;\\nattribute float side;\\nuniform vec2 view_size;\\nvec2 to2d(vec4 i) {\\n  return i.xy / i.w;\\n}\\n#endif\\n\";","module.exports = \"\\n#ifdef WIDE_LINES\\nvec4 mvpPosition = projectionMatrix * mvPosition; \\nmat3 vectorMatrix = mat3(modelViewMatrix);\\nvec2 _pos = to2d(mvpPosition) * view_size;\\nvec2 _prev = to2d(projectionMatrix * vec4(mvPosition.xyz + vectorMatrix * (prev * 0.01), 1.0)) * view_size;\\nvec2 _next = to2d(projectionMatrix * vec4(mvPosition.xyz - vectorMatrix * (next * 0.01), 1.0)) * view_size;\\nvec2 dir1 = _pos - _next;\\nvec2 dir2 = _prev - _pos;\\ndir2 = (length(dir2) > 0.0000001) ? normalize(dir2) : vec2(0.0, 0.0);\\ndir1 = (length(dir1) > 0.0000001) ? normalize(dir1) : dir2;\\nvec2 dir_sharp = normalize(dir1 + dir2);\\nvec2 dir = normalize(dir1 + dir_sharp);\\nvec2 offset = vec2(-dir.y, dir.x);\\nfloat len = 1.0 / cross(vec3(offset, 0), vec3(dir1, 0)).z;\\noffset *= len;\\noffset /= view_size;\\noffset *= side;\\noffset *= mvpPosition.w;\\nmvpPosition.xy += offset;\\ngl_Position = mvpPosition;\\n#endif\\n\";","module.exports = \"varying vec3 vColor;\\nvarying vec2 vUv;\\nuniform samplerCube envMap;\\nuniform vec3 uCamDir;\\nuniform vec3 uCamUp;\\nuniform vec2 uResolution;\\nuniform float uHalfFovTan;\\nuniform float opacity;\\nuniform bool envMapBackground;\\n#include<env_sample>\\nconst int bloomRange = 4;\\n#include<ordered_dither>\\nuniform float envMapExposure;\\n#if TONEMAP_OUTPUT > 0\\nuniform float exposureBias;\\n#include<tonemap>\\n#endif\\nvec3 rayDir(in vec2 vUv) {\\n    vec3 A = (uResolution.x/uResolution.y)*normalize(cross(uCamDir,uCamUp)) * (uHalfFovTan * 2.0);\\n    vec3 B = normalize(uCamUp) * (uHalfFovTan * 2.0);\\n    vec3 C = normalize(uCamDir);\\n    vec3 ray = normalize( C + (2.0*vUv.x-1.0)*A + (2.0*vUv.y-1.0)*B );\\n    return ray;\\n}\\nvec3 getColor(in vec3 rd) {\\n    return RGBMDecode(textureCube(envMap, adjustLookupVector(rd)), envMapExposure);\\n}\\nvoid main() {\\n    vec3 rd = rayDir(vUv);\\n    vec3 outColor;\\n    if (envMapBackground) {\\n        outColor = getColor(rd);\\n#if TONEMAP_OUTPUT == 1\\n        outColor = toneMapCanonOGS_WithGamma_WithColorPerserving(exposureBias * outColor);\\n#elif TONEMAP_OUTPUT == 2\\n        outColor = toneMapCanonFilmic_WithGamma(exposureBias * outColor);\\n#endif\\n    }\\n    else {\\n        outColor = vColor;\\n    }\\n    gl_FragColor = vec4(orderedDithering(outColor), opacity);\\n}\\n\";","module.exports = \"uniform vec3 color1;\\nuniform vec3 color2;\\nvarying vec2 vUv;\\nvarying vec3 vColor;\\nvoid main() {\\n    if (uv.y == 0.0)\\n        vColor = color2;\\n    else\\n        vColor = color1;\\n    vUv = uv;\\n    gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\\n}\\n\";","module.exports = \"uniform vec3 diffuse;\\nuniform float opacity;\\n#include<common>\\n#include<color_pars_fragment>\\n#include<map_pars_fragment>\\n#include<alphamap_pars_fragment>\\n#include<lightmap_pars_fragment>\\n#include<envmap_pars_fragment>\\n#include<specularmap_pars_fragment>\\n#if NUM_CUTPLANES > 0\\nvarying highp vec3 vWorldPosition;\\n#endif\\n#if defined( PARTICLE_UV )\\nvarying highp vec4 vUVp;\\n#endif\\n#if defined ( PARTICLE_FLAGS )\\nvarying float vFlagp;\\n#endif\\n#include<cutplanes>\\n#include<id_decl_frag>\\n#include<theming_decl_frag>\\nvoid main() {\\n#if NUM_CUTPLANES > 0\\n    checkCutPlanes(vWorldPosition);\\n#endif\\n    vec3 outgoingLight = vec3( 0.0 );\\n    vec4 diffuseColor = vec4( diffuse, opacity );\\n#if defined( USE_MAP ) && defined ( PARTICLE_FRAGMENT )\\n    #if defined( PARTICLE_UV )\\n        vec2 uv3 = mix( vUVp.xy, vUVp.zw, gl_PointCoord );\\n        diffuseColor = texture2D( map, uv3);\\n    #else\\n    \\tdiffuseColor = texture2D( map, gl_PointCoord );\\n    #endif\\n#else\\n    #include<map_fragment>\\n#endif\\n#include<color_fragment>\\n#include<alphamap_fragment>\\n#include<alphatest_fragment>\\n#include<specularmap_fragment>\\n    outgoingLight = diffuseColor.rgb;\\n#include<lightmap_fragment>\\n#include<envmap_fragment>\\n#include<linear_to_gamma_fragment>\\n    gl_FragColor = vec4( outgoingLight, diffuseColor.a );\\n    vec3 geomNormal = vec3(0.0,0.0,0.0);\\n    float depth = 0.0;\\n#include<theming_frag>\\n#if defined (DEPTH_OCCLUSION)\\n    gl_FragDepth = gl_FragCoord.z * float(DEPTH_OCCLUSION);\\n#endif\\n#if defined ( PARTICLE_FLAGS )\\n    if( vFlagp == 0. ) {\\n        discard;\\n    } else {\\n        gl_FragColor.rgba *= vec4(0.4, 0.6, 1., 1.);\\n    }\\n#endif\\n#include<final_frag>\\n}\\n\";","module.exports = \"#include<id_decl_vert>\\n#include<decl_point_size>\\n#include<common>\\n#include<map_pars_vertex>\\n#include<lightmap_pars_vertex>\\n#include<envmap_pars_vertex>\\n#include<color_pars_vertex>\\n#include<wide_lines_decl>\\n#include<pack_normals>\\n#ifdef USE_INSTANCING\\n    #include<instancing_decl_vert>\\n#endif\\n#if defined( PARTICLE_UV )\\nattribute vec4 uvp;\\nvarying highp vec4 vUVp;\\n#endif\\n#if defined (PARTICLE_FLAGS)\\nattribute float flagp;\\nvarying float vFlagp;\\n#endif\\n#if NUM_CUTPLANES > 0\\nvarying vec3 vWorldPosition;\\n#endif\\nvoid main() {\\n#ifdef USE_INSTANCING\\n    vec3 instancePosition = getInstancePos(position);\\n    #define position instancePosition\\n#endif\\n#if defined(USE_ENVMAP) && (defined(UNPACK_NORMALS) || defined(USE_INSTANCE))\\n    vec3 correctNormal;\\n    #ifdef UNPACK_NORMALS\\n        correctNormal = decodeNormal(normal);\\n    #else\\n        correctNormal = normal;\\n    #endif\\n    #ifdef USE_INSTANCING\\n        correctNormal = getInstanceNormal(correctNormal);\\n    #endif\\n    #define normal correctNormal\\n#endif\\n#include<map_vertex>\\n#include<lightmap_vertex>\\n#include<color_vertex>\\n#ifdef USE_ENVMAP\\n#include<defaultnormal_vertex>\\n#endif\\n#include<default_vertex>\\n#include<wide_lines_vert>\\n#include<worldpos_vertex>\\n#if NUM_CUTPLANES > 0\\n    vec4 _worldPosition = modelMatrix * vec4( position, 1.0 );\\n    vWorldPosition = _worldPosition.xyz;\\n#endif\\n#if defined( PARTICLE_UV )\\n    vUVp = uvp;\\n#endif\\n#include<envmap_vertex>\\n#include<id_vert>\\n#include<point_size>\\n#if defined (PARTICLE_FLAGS) \\n    vFlagp = flagp;\\n    gl_PointSize *= mix(1., 4./3., flagp);\\n#endif\\n}\\n\";","module.exports = \"uniform sampler2D tDiffuse;\\nuniform sampler2D tAO;\\nuniform int useAO;\\nuniform float aoOpacity;\\nuniform sampler2D tOverlay;\\nuniform int useOverlay;\\nuniform int useOverlayAlpha;\\nuniform vec2 resolution;\\nuniform vec4 objIDv4;\\nuniform sampler2D tID;\\nuniform vec4 edgeObjIDv4;\\n#if defined(USE_MODEL_ID)\\n#if defined(HIGHLIGHT_MODEL_ID_COUNT)\\nuniform vec2 modelIDsv2v[HIGHLIGHT_MODEL_ID_COUNT];\\n#else\\nuniform vec2 modelIDv2;\\n#endif\\nuniform sampler2D tID2;\\nuniform vec2 edgeModelIDv2;\\n#endif\\nuniform float highlightIntensity;\\nuniform vec3 selectionColor;\\nuniform float highlightFullModel;\\nuniform vec3 highlightColor;\\n#ifdef IS_2D\\nuniform float expand2dSelection;\\n#endif\\nuniform sampler2D tCrossFadeTex0;\\nuniform sampler2D tCrossFadeTex1;\\nuniform float     crossFadeOpacity0;\\nuniform float     crossFadeOpacity1;\\nvarying vec2 vUv;\\n#ifdef SPATIAL_FILTER\\n#include<depth_texture>\\n#endif\\n#include<tonemap>\\n#ifdef USE_IDBUFFER_SELECTION\\nbool isSelection(vec2 vUv, float I, float J) {\\n    vec4 idAtPixel = texture2D(tID, vUv+resolution*vec2(I,J));\\n    if (idAtPixel.rgb == vec3(0.0))\\n        return false;\\n#if defined(USE_MODEL_ID)\\n    vec4 modelAtPixel = texture2D(tID2, vUv+resolution*vec2(I,J));\\n    idAtPixel.a = modelAtPixel.b;\\n    vec4 idDelta = abs(idAtPixel.rgba - edgeObjIDv4.rgba);\\n    vec2 modelDelta = abs(modelAtPixel.rg - edgeModelIDv2.rg);\\n#else\\n    vec4 idDelta = vec4(abs(idAtPixel.rgb - edgeObjIDv4.rgb), 0.0);\\n    vec2 modelDelta = vec2(0.0, 0.0);\\n#endif\\n    if (max(max(modelDelta.r, modelDelta.g), max(max(idDelta.r, idDelta.g), max(idDelta.b, idDelta.a))) < 1e-3) {\\n        return true;\\n    } else {\\n        return false;\\n    }\\n}\\n#else\\nbool isSelected(vec3 C) {\\n    float minS = min(selectionColor.r, min(selectionColor.g, selectionColor.b));\\n    float maxS = max(selectionColor.r, max(selectionColor.g, selectionColor.b));\\n    float satS = maxS - minS;\\n    float minC = min(C.r, min(C.g, C.b));\\n    float maxC = max(C.r, max(C.g, C.b));\\n    float satC = maxC - minC;\\n    if (satC < .01 || satS < .01)\\n        return false;\\n    vec3 S = (selectionColor - minS) / satS;\\n    vec3 H = (C - minC) / satC;\\n    vec3 D = H - S;\\n    float eps = .15;\\n    return (abs(D.r) + abs(D.g) + abs(D.b) < eps)\\n        || (maxC >= (1.0 - eps) && D.r >= -eps && D.g >= -eps && D.b >= -eps);\\n}\\n#define IS_SELECTION(C) isSelected((C).rgb)\\n#endif\\nvec4 overlayEdgeDetect(vec2 vUv) {\\n#ifdef IS_2D\\n#define MAX_ALPHA(c)\\n#define SUM_ALPHA(c, w) sumAlpha += c.a * w; sumWeight += w;\\n#else\\n#define MAX_ALPHA(c) maxAlpha = max(maxAlpha, c.a);\\n#define SUM_ALPHA(c, w) \\n#endif\\n#ifdef USE_IDBUFFER_SELECTION\\n#define CHECK_EDGE_ALPHA(I, J, W)     { vec4 c = texture2D( tOverlay, vUv+resolution*vec2((I),(J)) ); MAX_ALPHA(c) if (c.a > 0.0 && isSelection(vUv, I, J)) { hasEdge++; SUM_ALPHA(c, W) selectionPixel = c; } }\\n#else\\n#define CHECK_EDGE_ALPHA(I, J, W)     { vec4 c = texture2D( tOverlay, vUv+resolution*vec2((I),(J)) ); MAX_ALPHA(c) if (c.a > 0.0 && IS_SELECTION(c)) { hasEdge++; SUM_ALPHA(c, W) selectionPixel = c; } }\\n#endif\\n#ifndef IS_2D\\n#define CHECK_EDGE_SELECTION(I, J) { vec4 c = texture2D( tOverlay, vUv+resolution*vec2((I),(J)) ); MAX_ALPHA(c) if (c.a <= 0.0) hasEdge++; }\\n#endif\\n    int hasEdge = 0;\\n    vec4 center = texture2D(tOverlay, vUv);\\n    vec4 selectionPixel = vec4(0.0);\\n#ifdef IS_2D\\n    float sumAlpha = 0.0, sumWeight = 0.0;\\n#else\\n    float maxAlpha = 0.0;\\n    bool paintOutline = false;\\n#endif\\n    if (center.a <= 0.0) {\\n        CHECK_EDGE_ALPHA(-1.0,-1.0, 1.0);\\n        CHECK_EDGE_ALPHA( 0.0,-1.0, 2.0);\\n        CHECK_EDGE_ALPHA( 1.0,-1.0, 1.0);\\n        CHECK_EDGE_ALPHA(-1.0, 0.0, 2.0);\\n        CHECK_EDGE_ALPHA( 1.0, 0.0, 2.0);\\n        CHECK_EDGE_ALPHA(-1.0, 1.0, 1.0);\\n        CHECK_EDGE_ALPHA( 0.0, 1.0, 2.0);\\n        CHECK_EDGE_ALPHA( 1.0, 1.0, 1.0);\\n        if (hasEdge != 0) {\\n#ifdef IS_2D\\n            center.a = -clamp(expand2dSelection - 1.0 + sumAlpha / sumWeight, 0.0, 1.0);\\n            center.rgb = center.a < 0.0 ? selectionPixel.rgb : center.rgb;\\n#else\\n            center = selectionPixel;\\n            paintOutline = true;\\n#endif\\n        }\\n    }\\n#ifdef USE_IDBUFFER_SELECTION\\n    else if (center.a > 0.0 && isSelection(vUv, 0.0, 0.0)) {\\n#else\\n    else if (center.a > 0.0 && IS_SELECTION(center)) {\\n#endif\\n#ifdef IS_2D\\n        center.a = -clamp(center.a + expand2dSelection, 0.0, 1.0);\\n#else\\n        CHECK_EDGE_SELECTION(-1.0,-1.0);\\n        CHECK_EDGE_SELECTION( 0.0,-1.0);\\n        CHECK_EDGE_SELECTION( 1.0,-1.0);\\n        CHECK_EDGE_SELECTION(-1.0, 0.0);\\n        CHECK_EDGE_SELECTION( 1.0, 0.0);\\n        CHECK_EDGE_SELECTION(-1.0, 1.0);\\n        CHECK_EDGE_SELECTION( 0.0, 1.0);\\n        CHECK_EDGE_SELECTION( 1.0, 1.0);\\n        if (hasEdge != 0)\\n            paintOutline = true;\\n        else\\n            center.a = -center.a;\\n#endif\\n    }\\n#ifndef IS_2D\\n    if (paintOutline) {\\n        float maxComponent = max(center.r, max(center.g, center.b));\\n        center.rgb /= maxComponent;\\n        center.rgb = sqrt(center.rgb);\\n        center.a = 0.5 + 0.5 * maxAlpha * 0.125 * float(hasEdge);\\n    }\\n#endif\\n    return center;\\n}\\n#ifdef SPATIAL_FILTER\\nSPATIAL_FILTER\\n#endif\\nvec4 sampleColor() {\\n    return texture2D( tDiffuse, vUv );\\n}\\nfloat sampleAO() {\\n    return (useAO != 0) ? sqrt(texture2D(tAO, vUv).r) : 1.0;\\n}\\nvec3 applyCrossFade(vec3 srcColor, sampler2D fadeTex, float opacity, vec2 vUv) {\\n    vec4 blendCol = texture2D(fadeTex, vUv);\\n    return mix(srcColor.rgb, blendCol.rgb, blendCol.a * opacity);\\n}\\nvoid applyHighlighting(inout vec3 rgb, float filterValue) {\\n#ifdef IS_2D\\n    rgb = mix(rgb, vec3(1.0,1.0,0.0), filterValue * highlightIntensity * 0.25);\\n#else\\n    rgb += highlightColor * filterValue * highlightIntensity * 0.20;\\n#endif\\n}\\n#ifdef USE_MODEL_ID\\nfloat getModelIdDelta(vec2 a, vec2 b) {\\n    vec2 delta = abs(a-b);\\n    return max(delta.r, delta.g);\\n}\\nfloat getModelIdDelta(vec2 modelAtPixel) {\\n    \\n#ifdef HIGHLIGHT_MODEL_ID_COUNT\\n    float delta = 1.0;\\n    for (int i=0; i<HIGHLIGHT_MODEL_ID_COUNT; i++) {\\n        delta = min(delta, getModelIdDelta(modelAtPixel, modelIDsv2v[i]));\\n    }\\n    return delta;\\n#else\\n    return getModelIdDelta(modelAtPixel, modelIDv2.rg);\\n#endif\\n}\\n#endif\\nvoid main() {\\n    vec4 texel = sampleColor();\\n    float ao = sampleAO();\\n    #ifdef NUM_CROSSFADE_TARGETS\\n        #if (NUM_CROSSFADE_TARGETS > 1)\\n            #if (TARGET_FADE_MODE == 0)\\n                texel.rgb = applyCrossFade(texel.rgb, tCrossFadeTex0, crossFadeOpacity0, vUv);\\n                texel.rgb = applyCrossFade(texel.rgb, tCrossFadeTex1, crossFadeOpacity1, vUv);\\n            #else\\n                vec4 t0 = texture2D(tCrossFadeTex0, vUv);\\n                vec4 t1 = texture2D(tCrossFadeTex1, vUv);\\n                vec4 mixed = mix(t0, t1, crossFadeOpacity1);\\n                texel.rgb = mix(texel.rgb, mixed.rgb, mixed.a);\\n                float aoGamma = 1.0 + 3.0 * (1.0 - 2.0 * abs(crossFadeOpacity1 - 0.5));\\n                if (aoGamma == 0.0)\\n                    aoGamma = 1.0;\\n                ao = pow(ao, 1.0 / aoGamma);\\n            #endif\\n        #else\\n            vec4 mixed = texture2D(tCrossFadeTex0, vUv);\\n            texel.rgb = mix(texel.rgb, mixed.rgb, mixed.a);\\n        #endif\\n    #else\\n    #endif\\n    ao = 1.0 - (1.0 - ao) * aoOpacity;\\n    texel.rgb *= ao;\\n    if (useOverlay != 0) {\\n        vec4 overlay = overlayEdgeDetect(vUv);\\n        if (overlay.a < 0.0) {\\n            overlay.a = -overlay.a;\\n#ifdef IS_2D\\n            overlay.a *= 0.6;\\n#else\\n            if (overlay.a >= 0.99) {\\n                overlay.a = 0.75;\\n                texel.rgb = vec3(luminance_post(texel.rgb));\\n            }\\n#endif\\n        }\\n#ifdef IS_2D\\n        texel.rgb = texel.rgb * (1.0 - overlay.a) + overlay.rgb;\\n#else\\n        texel.rgb = texel.rgb * (1.0 - overlay.a) + sqrt(overlay.rgb * overlay.a);\\n#endif\\n        if (useOverlayAlpha != 0) {\\n            texel.a += overlay.a * (1.0 - texel.a);\\n        }\\n    }\\n    if (objIDv4 != vec4(0.0)) {\\n    vec4 idAtPixel = texture2D(tID, vUv);\\n    #ifdef SPATIAL_FILTER\\n        vec3 worldPos = reconstructWorldPosition(gl_FragCoord.xy, vUv);\\n        float filterValue = (spatialFilter(worldPos) ? 1.0 : 0.0);\\n        if (idAtPixel != vec4(1,1,1,1)) {\\n            applyHighlighting(texel.rgb, filterValue);\\n        }\\n    #else\\n        #if defined(USE_MODEL_ID)\\n            vec4 modelAtPixel = texture2D(tID2, vUv);\\n            idAtPixel.a = modelAtPixel.b;\\n            vec4 idDelta = abs(idAtPixel.rgba - objIDv4.rgba) * (1.0 - highlightFullModel);\\n            float modelDelta = getModelIdDelta(modelAtPixel.rg);\\n        #else\\n            vec4 idDelta = vec4(abs(idAtPixel.rgb - objIDv4.rgb), 0.0);\\n            float modelDelta = 0.0;\\n        #endif\\n            if (max(modelDelta, max(max(idDelta.r, idDelta.g), max(idDelta.b, idDelta.a))) < 1e-3) {\\n                applyHighlighting(texel.rgb, 1.0);\\n            }\\n    #endif\\n    }\\n    gl_FragColor = texel;\\n}\\n\";","module.exports = \"\\n#include<depth_texture>\\nuniform sampler2D tDiffuse;\\nuniform sampler2D tID;\\nuniform vec2 resolution;\\nuniform float cameraNear;\\nuniform float cameraFar;\\nuniform sampler2D tFill;\\nuniform sampler2D tPaper;\\nuniform int style;\\nuniform int idEdges;\\nuniform int normalEdges;\\nuniform int depthEdges;\\nuniform float brightness;\\nuniform float contrast;\\nuniform int grayscale;\\nuniform int preserveColor;\\nuniform int outlineNoise;\\nuniform float levels;\\nuniform float repeats;\\nuniform float rotation;\\nuniform float outlineRadius;\\nuniform sampler2D tGraphite1;\\nuniform sampler2D tGraphite2;\\nuniform sampler2D tGraphite3;\\nuniform sampler2D tGraphite4;\\nuniform sampler2D tGraphite5;\\nuniform sampler2D tGraphite6;\\nuniform sampler2D tGraphite7;\\nuniform sampler2D tGraphite8;\\nvarying vec2 vUv;\\nvec4 recoverNZ(vec4 nrmz) {\\n    float z = sqrt(1.0 - dot(nrmz.xy, nrmz.xy));\\n    nrmz.w = -(nrmz.z + cameraNear) / (cameraFar - cameraNear);\\n    nrmz.z = z;\\n    return nrmz;\\n}\\n#include<tonemap>\\n#include<hsv>\\nvec3 quantize(vec3 c) {\\n    float L = max(c.r, max(c.g, c.b));\\n    c *= floor(L * (levels-1.0) + 0.5) / (L * (levels-1.0));\\n    return c;\\n}\\nvec3 quantizeRGB(vec3 c) {\\n    c *= c;\\n    c *= floor(c * levels * 0.9999) / (levels-1.0);\\n    return sqrt(c);\\n}\\nvec3 clampHue(vec3 c, float hues, float sats, float vals) {\\n    vec3 hsv = rgb2hsv(c);\\n    hsv.x = floor(hsv.x * hues + 0.5) / hues;\\n    hsv.y = floor(hsv.y * sats + 0.5) / sats;\\n    hsv.z = floor(hsv.z * vals + 0.5) / vals;\\n    vec3 col = hsv2rgb(hsv);\\n    return col;\\n}\\nvec3 reconstructCSFaceNormal(vec3 C) {\\n    return normalize(cross(dFdy(C), dFdx(C)));\\n}\\nvec3 getPosition(ivec2 ssP, float depth) {\\n    vec3 P;\\n    P = reconstructCSPosition(vec2(ssP) + vec2(0.5), depth);\\n    return P;\\n}\\nint isObjectEdge() {\\n    vec2 uv = vUv;\\n    if (outlineNoise == 1) {\\n        vec4 noise = texture2D(tGraphite7, vUv);\\n        uv = vUv + 0.02 * (noise.xy - vec2(0.25));\\n    }\\n    vec4 MM = texture2D(tID, uv);\\n    vec4 LL = texture2D(tID, uv + vec2(-outlineRadius, -outlineRadius) * resolution);\\n    if (MM != LL) return 1;\\n    vec4 LM = texture2D(tID, uv + vec2( 0.0, -outlineRadius) * resolution);\\n    if (MM != LM) return 1;\\n    vec4 LR = texture2D(tID, uv + vec2( outlineRadius, -outlineRadius) * resolution);\\n    if (MM != LR) return 1;\\n    vec4 ML = texture2D(tID, uv + vec2(-outlineRadius,  0.0) * resolution);\\n    if (MM != ML) return 1;\\n    vec4 MR = texture2D(tID, uv + vec2( outlineRadius,  0.0) * resolution);\\n    if (MM != MR) return 1;\\n    vec4 UL = texture2D(tID, uv + vec2(-outlineRadius,  outlineRadius) * resolution);\\n    if (MM != UL) return 1;\\n    vec4 UM = texture2D(tID, uv + vec2( 0.0,  outlineRadius) * resolution);\\n    if (MM != UM) return 1;\\n    vec4 UR = texture2D(tID, uv + vec2( outlineRadius,  outlineRadius) * resolution);\\n    if (MM != UR) return 1;\\n    return (MM.x + MM.y + MM.z + MM.w) >= 4.0 ? 0 : -1;\\n}\\nfloat normalDiff(vec3 n1, vec3 n2) {\\n    float d = dot(n1.xyz, n2.xyz);\\n    return acos(clamp(d, -1.0, 1.0));\\n}\\nint isNormalDepthEdge() {\\n    ivec2 ssC = ivec2(gl_FragCoord.xy);\\n    vec2 uv = vUv;\\n    if (outlineNoise == 1) {\\n        vec4 noise = texture2D(tGraphite7, vUv);\\n        uv = vUv + 0.02 * (noise.xy - vec2(0.25));\\n    }\\n    vec4 MM = texture2D(tDepth, uv);\\n    vec4 LL = texture2D(tDepth, uv + vec2(-outlineRadius, -outlineRadius) * resolution);\\n    vec4 LM = texture2D(tDepth, uv + vec2( 0.0, -outlineRadius) * resolution);\\n    vec4 LR = texture2D(tDepth, uv + vec2( outlineRadius, -outlineRadius) * resolution);\\n \\n    vec4 ML = texture2D(tDepth, uv + vec2(-outlineRadius,  0.0) * resolution);\\n    vec4 MR = texture2D(tDepth, uv + vec2( outlineRadius,  0.0) * resolution);\\n    vec4 UL = texture2D(tDepth, uv + vec2(-outlineRadius, outlineRadius) * resolution);\\n    vec4 UM = texture2D(tDepth, uv + vec2( 0.0,  outlineRadius) * resolution);\\n    vec4 UR = texture2D(tDepth, uv + vec2( outlineRadius,  outlineRadius) * resolution);\\n    LL = recoverNZ(LL);\\n    LM = recoverNZ(LM);\\n    LR = recoverNZ(LR);\\n    ML = recoverNZ(ML);\\n    MM = recoverNZ(MM);\\n    MR = recoverNZ(MR);\\n    UL = recoverNZ(UL);\\n    UM = recoverNZ(UM);\\n    UR = recoverNZ(UR);\\n    float dd = 0.0;\\n    if ( depthEdges == 1 ) {\\n        float G = (abs(UL.w - MM.w) + 2.0 * abs(UM.w - MM.w) + abs(UR.w - MM.w) + 2.0 * abs(ML.w - MM.w) + 2.0 * abs(MR.w - MM.w) + abs(LL.w - MM.w) + 2.0 * abs(LM.w - MM.w) + abs(LR.w - MM.w));\\n        dd = abs(dFdx(G)) + abs(dFdy(G));\\n    }\\n    float Gn = 0.0;\\n    if ( normalEdges == 1 ) {\\n        float pLL = normalDiff(LL.xyz, MM.xyz);\\n        float pLM = normalDiff(LM.xyz, MM.xyz);\\n        float pLR = normalDiff(LR.xyz, MM.xyz);\\n        float pML = normalDiff(ML.xyz, MM.xyz);\\n        float pMM = normalDiff(MM.xyz, MM.xyz);\\n        float pMR = normalDiff(MR.xyz, MM.xyz);\\n        float pUL = normalDiff(UL.xyz, MM.xyz);\\n        float pUM = normalDiff(UM.xyz, MM.xyz);\\n        float pUR = normalDiff(UR.xyz, MM.xyz);\\n        Gn = (abs(pUL - pMM) + 2.0 * abs(pUM - pMM) + abs(pUR - pMM) + 2.0 * abs(pML - pMM) + 2.0 * abs(pMR - pMM) + abs(pLL - pMM) + 2.0 * abs(pLM - pMM) + abs(pLR - pMM));\\n    }\\n    \\n    return (dd > 0.004 || Gn > 2.0) ? 1 : 0;\\n}\\nvec3 computeGraphite( vec3 color, vec2 loc ) {\\n    float lum = 0.299 * color.r + 0.587 * color.g + 0.114 * color.b;\\n    float offset;\\n    vec3 col1, col2;\\n    if ( lum > 6.0/7.0 ) {\\n        col1 = texture2D(tGraphite1, loc ).xyz;\\n        col2 = texture2D(tGraphite2, loc ).xyz;\\n        offset = 6.0/7.0;\\n    } else if ( lum > 5.0/7.0 ) {\\n        col1 = texture2D(tGraphite2, loc ).xyz;\\n        col2 = texture2D(tGraphite3, loc ).xyz;\\n        offset = 5.0/7.0;\\n    } else if ( lum > 4.0/7.0 ) {\\n        col1 = texture2D(tGraphite3, loc ).xyz;\\n        col2 = texture2D(tGraphite4, loc ).xyz;\\n        offset = 4.0/7.0;\\n    } else if ( lum > 3.0/7.0 ) {\\n        col1 = texture2D(tGraphite4, loc ).xyz;\\n        col2 = texture2D(tGraphite5, loc ).xyz;\\n        offset = 3.0/7.0;\\n    } else if ( lum > 2.0/7.0 ) {\\n        col1 = texture2D(tGraphite5, loc ).xyz;\\n        col2 = texture2D(tGraphite6, loc ).xyz;\\n        offset = 2.0/7.0;\\n    } else if ( lum > 1.0/7.0 ) {\\n        col1 = texture2D(tGraphite6, loc ).xyz;\\n        col2 = texture2D(tGraphite7, loc ).xyz;\\n        offset = 1.0/7.0;\\n    } else {\\n        col1 = texture2D(tGraphite7, loc ).xyz;\\n        col2 = texture2D(tGraphite8, loc ).xyz;\\n        offset = 0.0;\\n    }\\n    if ( col1.r == 0.0 && col2.r == 0.0 ) {\\n        return vec3(lum,lum,lum);\\n    }\\n    float t = (lum-offset)*7.0;\\n    return (col1 * t + col2 * (1.0 - t));\\n}\\nvec3 colorWithAdjustments() {\\n    vec3 sceneRGB = texture2D(tDiffuse, vUv).xyz;\\n    if ( brightness != 0.0 || contrast != 0.0) {\\n        if ( brightness < 0.0 )\\n        {\\n            sceneRGB = sceneRGB * (1.0 + brightness);\\n        }\\n        else\\n        {\\n            sceneRGB = sceneRGB + ((1.0 - sceneRGB) * brightness);\\n        }\\n        float slant = tan(( clamp(contrast,-1.0,1.0) + 1.0) * 3.141592/4.001);\\n        sceneRGB = (sceneRGB - 0.5) * slant + 0.5;\\n        if ( preserveColor == 1 )\\n        {\\n            float maxval = max( sceneRGB.r, sceneRGB.g );\\n            maxval = max( maxval, sceneRGB.b );\\n            if ( maxval > 1.0 )\\n            {\\n                sceneRGB /= maxval;\\n            }\\n        }\\n        sceneRGB = clamp(sceneRGB,0.0,1.0);\\n    }\\n    if ( grayscale == 1 ) {\\n        sceneRGB.rgb = vec3(luminance_post(sceneRGB.rgb));\\n    }\\n    return sceneRGB;\\n}\\nvoid main() {\\n    int foundEdge = 0;\\n    foundEdge = ( idEdges == 1 && isObjectEdge() == 1 ) ? 1 : 0;\\n    if ( foundEdge == 0 && (normalEdges == 1 || depthEdges == 1) ) {\\n        foundEdge = isNormalDepthEdge();\\n    }\\n    vec2 loc = vec2((vUv.x-0.5)*(resolution.y/resolution.x),vUv.y-0.5)*repeats;\\n    if ( style > 2 && rotation != 0.0 ) {\\n        float rot = 3.14159*rotation;\\n        float sinr = sin(rot);\\n        float cosr = cos(rot);\\n        loc = vec2(loc.x*cosr + -loc.y*sinr, loc.x*sinr + loc.y*cosr);\\n    }\\n    loc += vec2(0.5,0.5);\\n    vec3 color;\\n    if ( style == 2 ) {\\n        if ( foundEdge == 1 ) {\\n            gl_FragColor = vec4(0.0,0.0,0.0,1.0);\\n        } else {\\n            gl_FragColor = vec4(quantize(colorWithAdjustments()),1.0);\\n        }\\n    } else if ( style == 3 ) {\\n        color = colorWithAdjustments();\\n        vec3 graphColor = computeGraphite( color, loc );\\n        if ( foundEdge == 1 ) {\\n            gl_FragColor = vec4(0.16,0.16,0.16,1.0) + vec4(0.18 * graphColor,0.0);\\n        } else {\\n            gl_FragColor = vec4(graphColor,1.0);\\n        }\\n        return;\\n    } else if ( style == 4 ) {\\n        float fill = texture2D(tFill, loc ).r;\\n        float paperStrength = 0.3;\\n        vec3 paper = texture2D(tPaper, loc ).rgb;\\n        paper = paperStrength * paper + (1.0-paperStrength)*vec3(1.0,1.0,1.0);\\n        if ( foundEdge == 1 ) {\\n            gl_FragColor = 0.75 * vec4(paper * fill, 1.0);\\n        } else {\\n            fill = pow(fill,1.6);\\n            gl_FragColor = vec4(colorWithAdjustments() * (1.0 - fill) + paper * fill, 1.0);\\n        }\\n    } else {\\n        if ( foundEdge == 1 ) {\\n            gl_FragColor = vec4(0.0,0.0,0.0,1.0);\\n        } else {\\n            gl_FragColor = vec4(colorWithAdjustments(),1.0);\\n        }\\n        return;        \\n    }\\n}\\n\";","module.exports = \"uniform sampler2D tDiffuse;\\nvarying vec2 vUv;\\nvoid main() {\\n    gl_FragColor = texture2D(tDiffuse, vUv);\\n}\\n\";","module.exports = \"\\n#if NUM_CUTPLANES > 0\\nvarying vec3 vWorldPosition;\\n#endif\\n#include<cutplanes>\\nuniform vec4 color;\\n#include<id_decl_frag>\\nvoid main() {\\n#if NUM_CUTPLANES > 0\\n    checkCutPlanes(vWorldPosition);\\n#endif\\n    gl_FragColor = color;\\n#ifdef MRT_NORMALS\\noutNormal = vec4(0.0);\\n#endif\\n#ifdef MRT_ID_BUFFER\\n    outId = vec4(0.0);\\n    #ifdef MODEL_COLOR\\n        outModelId = vec4(0.0);\\n    #endif\\n#elif defined(ID_COLOR)\\n    gl_FragColor = vec4(0.0);\\n#elif defined(MODEL_COLOR)\\n    gl_FragColor = vec4(0.0);\\n#endif\\n}\";","module.exports = \"\\n#if NUM_CUTPLANES > 0\\nvarying vec3 vWorldPosition;\\n#endif\\n#include<instancing_decl_vert>\\nvoid main() {\\n    vec3 instPos = getInstancePos(position);\\n#if NUM_CUTPLANES > 0\\n    vec4 worldPosition = modelMatrix * vec4( instPos, 1.0 );\\n    vWorldPosition = worldPosition.xyz;\\n#endif\\n    vec4 mvPosition = modelViewMatrix * vec4( instPos, 1.0 );\\n    vec4 p_Position = projectionMatrix * mvPosition;\\n    gl_Position = p_Position;\\n}\";","module.exports = \"#define FXAA_EDGE_SHARPNESS (8.0)\\n#define FXAA_EDGE_THRESHOLD (0.125)\\n#define FXAA_EDGE_THRESHOLD_MIN (0.05)\\n#define FXAA_RCP_FRAME_OPT (0.50)\\n#define FXAA_RCP_FRAME_OPT2 (2.0)\\nuniform sampler2D tDiffuse;\\nuniform highp vec2 uResolution;\\nvarying vec2 vPos;\\nvarying vec4 vPosPos;\\nfloat FxaaLuma(vec3 rgb) {\\n    return dot(rgb, vec3(0.299, 0.587, 0.114));\\n}\\nvoid main() {\\n    float lumaNw = FxaaLuma(texture2D(tDiffuse, vPosPos.xy).rgb);\\n    float lumaSw = FxaaLuma(texture2D(tDiffuse, vPosPos.xw).rgb);\\n    float lumaNe = FxaaLuma(texture2D(tDiffuse, vPosPos.zy).rgb) + 1.0/384.0;\\n    float lumaSe = FxaaLuma(texture2D(tDiffuse, vPosPos.zw).rgb);\\n    vec4 rgbaM = texture2D(tDiffuse, vPos.xy);    \\n    float lumaM = FxaaLuma(rgbaM.rgb);\\n    float lumaMax = max(max(lumaNe, lumaSe), max(lumaNw, lumaSw));\\n    float lumaMin = min(min(lumaNe, lumaSe), min(lumaNw, lumaSw));\\n    float lumaMaxSubMinM = max(lumaMax, lumaM) - min(lumaMin, lumaM);\\n    float lumaMaxScaledClamped = max(FXAA_EDGE_THRESHOLD_MIN, lumaMax * FXAA_EDGE_THRESHOLD);\\n    if (lumaMaxSubMinM < lumaMaxScaledClamped) {\\n        gl_FragColor = rgbaM;\\n        return;\\n    }\\n    float dirSwMinusNe = lumaSw - lumaNe;\\n    float dirSeMinusNw = lumaSe - lumaNw;\\n    vec2 dir1 = normalize(vec2(dirSwMinusNe + dirSeMinusNw, dirSwMinusNe - dirSeMinusNw));\\n    vec3 rgbN1 = texture2D(tDiffuse, vPos.xy - dir1 * FXAA_RCP_FRAME_OPT*uResolution).rgb;\\n    vec3 rgbP1 = texture2D(tDiffuse, vPos.xy + dir1 * FXAA_RCP_FRAME_OPT*uResolution).rgb;\\n    float dirAbsMinTimesC = min(abs(dir1.x), abs(dir1.y)) * FXAA_EDGE_SHARPNESS;\\n    vec2 dir2 = clamp(dir1.xy / dirAbsMinTimesC, -2.0, 2.0);\\n    vec3 rgbN2 = texture2D(tDiffuse, vPos.xy - dir2 * FXAA_RCP_FRAME_OPT2*uResolution).rgb;\\n    vec3 rgbP2 = texture2D(tDiffuse, vPos.xy + dir2 * FXAA_RCP_FRAME_OPT2*uResolution).rgb;\\n    vec3 rgbA = rgbN1 + rgbP1;\\n    vec3 rgbB = ((rgbN2 + rgbP2) * 0.25) + (rgbA * 0.25);\\n    float lumaB = FxaaLuma(rgbB);\\n    float alpha = rgbaM.a;\\n    if ((lumaB < lumaMin) || (lumaB > lumaMax))\\n        gl_FragColor = vec4(rgbA * 0.5, rgbaM.a);\\n    else\\n        gl_FragColor = vec4(rgbB, rgbaM.a);\\n}\\n\";","module.exports = \"uniform vec2 uResolution;\\nvarying vec2 vPos;\\nvarying vec4 vPosPos;\\nvoid main() {\\n    vPos = uv;\\n    vPosPos.xy = uv + vec2(-0.5, -0.5) * uResolution;\\n    vPosPos.zw = uv + vec2( 0.5,  0.5) * uResolution;\\n    gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\\n}\\n\";","module.exports = \"uniform sampler2D tDiffuse;\\nuniform vec4 uColor;\\nvarying vec2 vUv;\\n#ifdef HORIZONTAL\\n#define GET_UV(X) vec2(vUv.x + KERNEL_SCALE_H*(X), vUv.y)\\n#else\\n#define GET_UV(Y) vec2(vUv.x, vUv.y + KERNEL_SCALE_V*(Y))\\n#endif\\n#define PI 3.14159265358979\\n#define SIGMA ((KERNEL_RADIUS+KERNEL_RADIUS+1.0) / 6.0)\\n#define SIGMASQ2 (2.0 * SIGMA * SIGMA)\\n#define GAUSSIAN(X) ( (1.0 / sqrt(PI * SIGMASQ2)) * exp(-(X)*(X)/SIGMASQ2) )\\nvoid main() {\\n    vec4 texColSum = vec4(0.0);\\n    float gaussSum = 0.0;\\n    for (float x=-KERNEL_RADIUS; x<=KERNEL_RADIUS; x+=1.0) {\\n        float gauss = GAUSSIAN(x);\\n        vec4 texCol = texture2D(tDiffuse, GET_UV(x));\\n#ifdef HAS_ALPHA\\n        texCol.rgb *= texCol.a;\\n#endif\\n        texColSum += texCol * gauss;\\n        gaussSum += gauss;\\n    }\\n#ifdef HAS_ALPHA\\n    texColSum.rgb /= (texColSum.a == 0.0 ? 0.0001 : texColSum.a);\\n#endif\\n#ifdef HORIZONTAL\\n    gl_FragColor = texColSum/gaussSum;\\n#else\\n    gl_FragColor = texColSum/gaussSum * uColor;\\n#endif\\n}\\n\";","module.exports = \"varying vec2 vUv;\\nvoid main() {\\n#if defined(HORIZONTAL) && defined(FLIP_UV)\\n    vUv = vec2(uv.x, 1.0-uv.y);\\n#else\\n    vUv = vec2(uv.x, uv.y);\\n#endif\\n    gl_Position = projectionMatrix * modelViewMatrix * vec4(position, 1.0);\\n}\\n\";","module.exports = \"uniform sampler2D tDiffuse;\\nvarying vec2 vUv;\\nvoid main() {\\n    vec4 texel = texture2D( tDiffuse, vUv );\\n    gl_FragColor = texel;\\n}\\n\";","module.exports = \"#define NUM_SAMPLES 29.0\\n#define NUM_SPIRAL_TURNS 7.0\\nuniform sampler2D tDepth;\\nuniform vec3 worldSize;\\nvarying vec2 vUv;\\n#ifdef PRESET_2\\n#define SAMPLE_RADIUS 0.3\\n#define AO_GAMMA 1.0\\n#define AO_INTENSITY 1.0\\n#else\\n#define SAMPLE_RADIUS 0.2\\n#define AO_GAMMA 3.0\\n#define AO_INTENSITY 0.8\\n#endif\\n#include<pack_depth>\\n#define PI 3.14159265358979\\nfloat rand(vec2 co) {\\n    return fract(sin(dot(co.xy, vec2(12.9898, 78.233))) * 43758.5453);\\n}\\nfloat getRandomAngle(vec2 pos) {\\n    return rand(pos) * (2.0 * PI);\\n}\\nvec2 tapLocation(float sampleNumber, float spinAngle, out float ssR){\\n    float alpha = float(sampleNumber + 0.5) * (1.0 / NUM_SAMPLES);\\n    float angle = alpha * (NUM_SPIRAL_TURNS * PI * 2.0) + spinAngle;\\n    ssR = alpha;\\n    return vec2(cos(angle), sin(angle));\\n}\\nvec2 sampleAO(vec2 unitDirection, float radius) {\\n    vec2 sampleOffset = unitDirection * radius;\\n    float idepth = unpackDepth(texture2D(tDepth, vUv + sampleOffset));\\n    float depth = 1.0 - idepth;\\n    if (depth < 1e-6) {\\n        if (radius == 0.0)\\n            return vec2(1.0, 1.0);\\n        else\\n            return vec2(0.0, 1.0);\\n    }\\n    vec3 dir = vec3(sampleOffset.x, depth, sampleOffset.y) * worldSize;\\n    float distance2 = dot(dir,dir);\\n    float idistance = 1.0 / sqrt(distance2);\\n    vec3 ndir = dir * idistance;\\n#ifdef PRESET_2\\n    float importance = ndir.y * idistance;\\n#else\\n    float importance = ndir.y / distance2;\\n#endif\\n    vec2 ret;\\n    ret.x = (idepth == 0.0) ? 0.0 : importance;\\n    ret.y = importance;\\n    return ret;\\n}\\nvoid main() {\\n    vec2 sum = vec2(0.0);\\n    float angle = getRandomAngle(vUv);\\n    for (float i = 0.0; i<NUM_SAMPLES; i+= 1.0) {\\n        float ssR;\\n        vec2 uv = tapLocation(i, angle, ssR);\\n        sum += sampleAO(uv, ssR * SAMPLE_RADIUS);\\n    }\\n    float ao = sum.x / sum.y;\\n    gl_FragColor = packDepth(AO_INTENSITY * clamp(pow(ao, AO_GAMMA), 0.0, 0.9999));\\n}\\n\";","module.exports = \"uniform sampler2D tDepth;\\nvarying vec2 vUv;\\n#ifdef HORIZONTAL\\n#define GET_UV(X) vec2(vUv.x + KERNEL_SCALE*(X), vUv.y)\\n#else\\n#define GET_UV(Y) vec2(vUv.x, vUv.y + KERNEL_SCALE*(Y))\\n#endif\\n#include<pack_depth>\\n#define PI 3.14159265358979\\n#define SIGMA ((2.0 * KERNEL_RADIUS+1.0) / 6.0)\\n#define SIGMASQ2 (2.0 * SIGMA * SIGMA)\\n#ifdef BOX\\n#define KERNEL_VAL(X) 1.0\\n#else\\n#define KERNEL_VAL(X) ( (1.0 / sqrt(PI * SIGMASQ2)) * exp(-(X)*(X)/SIGMASQ2) )\\n#endif\\nvoid main() {\\n    float depthVal = 0.0;\\n    float sum = 0.0;\\n    for (float x=-KERNEL_RADIUS; x<=KERNEL_RADIUS; x+=1.0) {\\n        depthVal += unpackDepth(texture2D(tDepth, GET_UV(x))) * KERNEL_VAL(x);\\n        sum += KERNEL_VAL(x);\\n    }\\n    gl_FragColor = packDepth(depthVal/sum);\\n}\\n\";","module.exports = \"uniform sampler2D tDepth;\\nuniform vec4 uShadowColor;\\nvarying vec2 vUv;\\n#include<pack_depth>\\nvoid main() {\\n    float depthVal = unpackDepth(texture2D(tDepth, vUv));\\n    gl_FragColor = vec4(uShadowColor.rgb, uShadowColor.a * depthVal);\\n}\\n\";","module.exports = \"#include<pack_depth>\\n#if NUM_CUTPLANES > 0\\nvarying vec3 vWorldPosition;\\n#endif\\n#include<cutplanes>\\nvoid main() {\\n#if NUM_CUTPLANES > 0\\n    checkCutPlanes(vWorldPosition);\\n#endif\\n    float depth = gl_FragCoord.z / gl_FragCoord.w;\\n    depth = 1.0 - depth;\\n    gl_FragColor = packDepth(depth);\\n}\\n\";","module.exports = \"#if NUM_CUTPLANES > 0\\nvarying vec3 vWorldPosition;\\n#endif\\nvoid main() {\\n    gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );;\\n#if NUM_CUTPLANES > 0\\n    vec4 worldPosition = modelMatrix * vec4( position, 1.0 );\\n    vWorldPosition = worldPosition.xyz;\\n#endif\\n}\\n\";","module.exports = \"\\r\\n\\r\\n\\r\\n#include<line_decl_common>\\r\\n#include<id_decl_frag>\\r\\n\\r\\nuniform highp float pixelsPerUnit;\\r\\nuniform highp float aaRange;\\r\\n\\r\\nuniform float opacity;\\r\\nuniform highp float viewportId;\\r\\nuniform highp float swap;\\r\\nuniform highp float grayscale;\\r\\n\\r\\n#ifdef HAS_RASTER_QUADS\\r\\nuniform sampler2D tRaster;\\r\\n#endif\\r\\n\\r\\n#ifdef HAS_LINESTYLES\\r\\nuniform sampler2D tLineStyle;\\r\\nuniform vec2 vLineStyleTexSize;\\r\\n#endif\\r\\n\\r\\n#ifdef VIEWPORT_CLIPPING\\r\\nuniform highp vec4 viewportBounds;\\r\\nvarying highp vec2 vPosition;\\r\\n#endif\\r\\n\\r\\n#ifdef IMAGE_UV_TEXTURE\\r\\nvarying highp vec2 vuv;\\r\\nuniform sampler2D tRaster;\\r\\n#endif\\r\\n\\r\\n\\r\\nfloat curveGaussian(float r, float invWidth) {\\r\\n    float amt = clamp(r * invWidth, 0.0, 1.0);\\r\\n\\r\\n    float exponent = amt * 2.0;\\r\\n\\r\\n    return exp(-exponent*exponent);\\r\\n\\r\\n\\r\\n\\r\\n}\\r\\n\\r\\n#ifdef HAS_LINESTYLES\\r\\nfloat getLinePatternPixel(int i, int j) {\\r\\n\\r\\n    return texture2D(tLineStyle, (vec2(i, j) + 0.5) / vLineStyleTexSize).x * 255.0;\\r\\n}\\r\\n\\r\\nfloat getPatternLength(int whichPattern) {\\r\\n    float p1 = getLinePatternPixel(0, whichPattern);\\r\\n    float p2 = getLinePatternPixel(1, whichPattern);\\r\\n    return (p2 * 256.0 + p1);\\r\\n}\\r\\n#endif\\r\\n\\r\\n\\r\\nvoid fillLineSegment() {\\r\\n\\r\\n    float radius = abs(fsHalfWidth);\\r\\n    float parametricDistance = fsMultipurpose.x;\\r\\n    float segmentLength      = fsMultipurpose.y;\\r\\n    float totalDistance      = fsMultipurpose.z;\\r\\n\\r\\n#ifdef LOADING_ANIMATION\\r\\n    float distFromStart = parametricDistance / segmentLength;\\r\\n    if (loadingProgress < 1.0 && distFromStart > loadingProgress) {\\r\\n        discard;\\r\\n    }\\r\\n#endif\\r\\n\\r\\n\\r\\n#ifdef HAS_LINESTYLES\\r\\n    int whichPattern         = int(fsMultipurpose.w);\\r\\n\\r\\n    if (whichPattern > 0) {\\r\\n        const float TEX_TO_UNIT = 1.0 / 96.0;\\r\\n\\r\\n        float patternScale;\\r\\n\\r\\n\\r\\n\\r\\n        if (fsHalfWidth < 0.0) {\\r\\n            patternScale = LTSCALE;\\r\\n        } else {\\r\\n            patternScale = LTSCALE * TEX_TO_UNIT * pixelsPerUnit;\\r\\n        }\\r\\n\\r\\n        float patLen = patternScale * getPatternLength(whichPattern);\\r\\n        float phase = mod((totalDistance + parametricDistance) * pixelsPerUnit, patLen);\\r\\n\\r\\n        bool onPixel = true;\\r\\n        float radiusPixels = radius * pixelsPerUnit;\\r\\n\\r\\n        for (int i=2; i<MAX_LINESTYLE_LENGTH; i+=2) {\\r\\n\\r\\n            float on = getLinePatternPixel(i, whichPattern);\\r\\n            if (on == 1.0) on = 0.0;\\r\\n            on *= patternScale;\\r\\n\\r\\n            onPixel = true;\\r\\n            phase -= on;\\r\\n            if (phase < 0.0) {\\r\\n                break;\\r\\n            }\\r\\n            else if (phase <= radiusPixels) {\\r\\n                onPixel = false;\\r\\n                break;\\r\\n            }\\r\\n\\r\\n            float off = getLinePatternPixel(i+1, whichPattern);\\r\\n            if (off <= 1.0) off = 0.0;\\r\\n            off *= patternScale;\\r\\n\\r\\n            onPixel = false;\\r\\n            phase -= off;\\r\\n            if (phase < -radiusPixels)\\r\\n                discard;\\r\\n            if (phase <= 0.0)\\r\\n                break;\\r\\n        }\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n        if (!onPixel && (abs(phase) <= radiusPixels)) {\\r\\n            segmentLength = 0.0;\\r\\n            parametricDistance = phase / pixelsPerUnit;\\r\\n        }\\r\\n    }\\r\\n#endif\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    float dist;\\r\\n    float offsetLength2 = dot(fsOffsetDirection, fsOffsetDirection);\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    float ltz = max(0.0, sign(-parametricDistance));\\r\\n    float gtsl = max(0.0, sign(parametricDistance - segmentLength));\\r\\n    float d = (ltz + gtsl) * (parametricDistance - gtsl * segmentLength);\\r\\n    dist = sqrt(max(0.0, offsetLength2 + d*d));\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    float range =  dist - radius;\\r\\n\\r\\n    if (range > aaRange) {\\r\\n        discard;\\r\\n    }\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    gl_FragColor = fsColor;\\r\\n    gl_FragColor.a *= curveGaussian(range+aaRange, pixelsPerUnit);\\r\\n}\\r\\n\\r\\n#ifdef HAS_CIRCLES\\r\\nvoid fillCircularArc() {\\r\\n\\r\\n    float dist   = length(fsOffsetDirection);\\r\\n    vec2 angles  = fsMultipurpose.xz;\\r\\n    float radius = abs(fsMultipurpose.y);\\r\\n    float range  =  abs(dist - radius);\\r\\n    range -= fsHalfWidth;\\r\\n\\r\\n\\r\\n\\r\\n    if (range > aaRange) {\\r\\n        discard;\\r\\n    }\\r\\n\\r\\n    vec2 direction = fsOffsetDirection;\\r\\n    float angle = atan(direction.y, direction.x);\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    if (angles.x > angles.y) {\\r\\n\\r\\n        if (angle > angles.x && angle < PI) {\\r\\n                angle -= TAU;\\r\\n        }\\r\\n        angles.x -= TAU;\\r\\n\\r\\n\\r\\n\\r\\n        if (angle < angles.x ) {\\r\\n            angle += TAU;\\r\\n        }\\r\\n    }\\r\\n    else if (angle < 0.0)\\r\\n        angle += TAU;\\r\\n\\r\\n#ifdef LOADING_ANIMATION\\r\\n    if ((angle - angles.x) / (angles.y - angles.x) > loadingProgress) {\\r\\n        discard;\\r\\n    }\\r\\n#endif\\r\\n\\r\\n\\r\\n    if (angle > angles.x && angle < angles.y) {\\r\\n        gl_FragColor = fsColor;\\r\\n        gl_FragColor.a *= curveGaussian(range+aaRange, pixelsPerUnit);\\r\\n    }\\r\\n    else {\\r\\n        discard;\\r\\n    }\\r\\n\\r\\n}\\r\\n#endif\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n#ifdef HAS_ELLIPTICALS\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\nfloat EllipticalApprox(\\r\\n        const int iters,\\r\\n        inout float t0, inout float t1,\\r\\n        const vec2 y,   out   vec2 x,\\r\\n        const vec2 e,   const vec2 ey, const vec2 esqr\\r\\n        ) {\\r\\n    vec2 r;\\r\\n    for (int i = 0; i < 10; ++i) {\\r\\n        if(i >= iters) break;\\r\\n\\r\\n        float t = mix(t0, t1, 0.5);\\r\\n        r = ey / (vec2(t) + esqr);\\r\\n\\r\\n        vec2 rsq = r * r;\\r\\n        float f = rsq.x + rsq.y - 1.0;\\r\\n\\r\\n        if(f > 0.0) { t0 = t; } else { t1 = t; }\\r\\n    }\\r\\n\\r\\n    x = e * r;\\r\\n    return distance(x, y);\\r\\n}\\r\\n\\r\\nfloat DistancePointEllipseSpecial (vec2 e, vec2 y, out vec2 x, float width, float aaRange) {\\r\\n    float dist;\\r\\n\\r\\n\\r\\n    vec2 esqr = e * e;\\r\\n    vec2 ey   = e * y;\\r\\n    float t0 = -esqr[1] + ey[1];\\r\\n    float t1 = -esqr[1] + length(ey);\\r\\n\\r\\n\\r\\n\\r\\n    dist = EllipticalApprox(6, t0, t1, y, x, e, ey, esqr);\\r\\n\\r\\n\\r\\n    if (dist > max(2.0 * (width + aaRange), e[0] * 0.05))\\r\\n        return dist;\\r\\n\\r\\n\\r\\n    dist = EllipticalApprox(6, t0, t1, y, x, e, ey, esqr);\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    float ecc = 1.0 +  0.1 * e[0] / e[1];\\r\\n\\r\\n    if (dist > max(ecc * (width + aaRange), e[0] * 0.001))\\r\\n        return dist;\\r\\n    if (dist < (width - aaRange) / ecc)\\r\\n        return dist;\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    dist = EllipticalApprox(10, t0, t1, y, x, e, ey, esqr);\\r\\n    return dist;\\r\\n}\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\nfloat DistancePointEllipse(vec2 e, vec2 y, out vec2 locX, float width, float aaRange) {\\r\\n    vec2 locE, locY;\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    float diff = sign(e[0] - e[1]);\\r\\n    vec2 swizzle = vec2(max(diff, 0.0), -min(diff, 0.0));\\r\\n    locE.x = dot(e, swizzle.xy);\\r\\n    locE.y = dot(e, swizzle.yx);\\r\\n    locY.x = dot(y, swizzle.xy);\\r\\n    locY.y = dot(y, swizzle.yx);\\r\\n\\r\\n\\r\\n    vec2 refl = sign(locY);\\r\\n    locY *= refl;\\r\\n\\r\\n    vec2 x;\\r\\n    float distance = DistancePointEllipseSpecial(locE, locY, x, width, aaRange);\\r\\n\\r\\n    x *= refl;\\r\\n\\r\\n    locX.x = dot(x, swizzle.xy);\\r\\n    locX.y = dot(x, swizzle.yx);\\r\\n\\r\\n    return distance;\\r\\n}\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\nvoid fillEllipticalArc() {\\r\\n    vec2 angles = fsMultipurpose.xz;\\r\\n    vec2 radii  = abs(fsMultipurpose.yw);\\r\\n    vec2 dir    = fsOffsetDirection;\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    vec2 pos;\\r\\n    float range = DistancePointEllipse(radii, dir, pos, fsHalfWidth, aaRange);\\r\\n    range -= fsHalfWidth;\\r\\n\\r\\n    if (range > aaRange)\\r\\n        discard;\\r\\n\\r\\n    float ar = radii[0] / radii[1];\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    float angle = atan(ar * pos.y, pos.x);\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    if (angles.x > angles.y) {\\r\\n\\r\\n        if (angle > angles.x && angle < PI) {\\r\\n            angle -= TAU;\\r\\n        }\\r\\n        angles.x -= TAU;\\r\\n\\r\\n\\r\\n\\r\\n        if (angle < angles.x ) {\\r\\n            angle += TAU;\\r\\n        }\\r\\n    }\\r\\n    else if (angle < 0.0)\\r\\n        angle += TAU;\\r\\n\\r\\n#ifdef LOADING_ANIMATION\\r\\n    if ((angle - angles.x) / (angles.y - angles.x) > loadingProgress) {\\r\\n        discard;\\r\\n    }\\r\\n#endif\\r\\n\\r\\n\\r\\n    if (angle > angles.x && angle < angles.y) {\\r\\n        gl_FragColor = fsColor;\\r\\n        gl_FragColor.a *= curveGaussian(range+aaRange, pixelsPerUnit);\\r\\n    }\\r\\n    else {\\r\\n        discard;\\r\\n    }\\r\\n}\\r\\n#endif\\r\\n\\r\\n#ifdef HAS_RASTER_QUADS\\r\\n    void fillTexQuad() {\\r\\n        gl_FragColor = texture2D(tRaster, fsMultipurpose.xy);\\r\\n        #ifdef LOADING_ANIMATION\\r\\n            gl_FragColor.a *= loadingProgress;\\r\\n        #endif\\r\\n    }\\r\\n#endif\\r\\n\\r\\nvoid fillTriangle() {\\r\\n#ifdef IMAGE_UV_TEXTURE\\r\\n    gl_FragColor = texture2D(tRaster, fract(vuv));\\r\\n#else\\r\\n    gl_FragColor = fsColor;\\r\\n#endif\\r\\n\\r\\n#ifdef LOADING_ANIMATION\\r\\n    gl_FragColor.a *= loadingProgress;\\r\\n#endif\\r\\n}\\r\\n\\r\\n#if NUM_CUTPLANES > 0\\r\\nvarying highp vec3 vWorldPosition;\\r\\n#endif\\r\\n\\r\\n#ifdef MSDF_TEXTURE_FONT\\r\\nvarying highp vec2 vuv;\\r\\nvarying float isMSDFQuards;\\r\\nuniform sampler2D tRaster;\\r\\nfloat median(float r, float g, float b) {\\r\\n  return max(min(r, g), min(max(r, g), b));\\r\\n}\\r\\n\\r\\n#endif\\r\\n\\r\\n#include<cutplanes>\\r\\n\\r\\nvoid main() {\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    if (fsColor == vec4(0.0)) {\\r\\n        discard;\\r\\n    }\\r\\n\\r\\n\\r\\n#ifdef VIEWPORT_CLIPPING\\r\\n    if(vPosition.x < viewportBounds.x || vPosition.x > viewportBounds.z || vPosition.y < viewportBounds.y || vPosition.y > viewportBounds.w) {\\r\\n        discard;\\r\\n    }\\r\\n#endif\\r\\n\\r\\n#ifdef MSDF_TEXTURE_FONT\\r\\n    vec4 msdfColor = texture2D(tRaster, vuv);\\r\\n    float dist = median(msdfColor.r, msdfColor.g, msdfColor.b);\\r\\n\\r\\n\\r\\n    float delta = mix(0.25, 0.5, 1.0 - fwidth(dist));\\r\\n\\r\\n    float sigDist = dist - delta;\\r\\n    float msdfAlpha = clamp(sigDist/fwidth(sigDist) + delta, 0.0, 1.0);\\r\\n\\r\\n    msdfAlpha = smoothstep(0., 1., msdfAlpha);\\r\\n    gl_FragColor.a =  mix(msdfAlpha, 1., 1.-isMSDFQuards);\\r\\n    if (gl_FragColor.a < 0.0001) discard;\\r\\n\\r\\n#endif\\r\\n\\r\\n\\r\\n    if (fsHalfWidth == 0.0) {\\r\\n#ifdef HAS_RASTER_QUADS\\r\\n        if (fsMultipurpose.z != 0.0)\\r\\n            fillTexQuad();\\r\\n        else\\r\\n#endif\\r\\n            fillTriangle();\\r\\n    }\\r\\n    else if (fsMultipurpose.y < 0.0) {\\r\\n#ifdef HAS_CIRCLES\\r\\n#ifdef HAS_ELLIPTICALS\\r\\n        if (abs(fsMultipurpose.y) == fsMultipurpose.w)\\r\\n#endif\\r\\n            fillCircularArc();\\r\\n#endif\\r\\n#ifdef HAS_ELLIPTICALS\\r\\n#ifdef HAS_CIRCLES\\r\\n        else\\r\\n#endif\\r\\n            fillEllipticalArc();\\r\\n#endif\\r\\n    }\\r\\n    else\\r\\n        fillLineSegment();\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    float writeId = 1.0;\\r\\n    \\r\\n    gl_FragColor.a *= opacity;\\r\\n\\r\\n    if (gl_FragColor.a == 0.0) {\\r\\n        discard;\\r\\n    }\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    if (fsGhosting != 0.0 || \\r\\n            ((viewportId != 0.0) && (abs(fsVpTC.x * 255.0 + fsVpTC.y) >= 0.5 && abs(fsVpTC.x * 255.0 + fsVpTC.y - viewportId) >= 0.5))) {\\r\\n\\r\\n        writeId = 0.0;\\r\\n\\r\\n\\r\\n\\r\\n        gl_FragColor.a *= ((swap == 1.0) ? 0.21 : 0.1);\\r\\n    }\\r\\n\\r\\n#ifndef SELECTION_RENDERER\\r\\n\\r\\n    if (grayscale != 0.0) {\\r\\n        const vec3 rgb2grey = vec3(0.299, 0.587, 0.114);\\r\\n        float gray = dot(gl_FragColor.rgb, rgb2grey);\\r\\n        gl_FragColor.rgb = vec3(gray);\\r\\n    }\\r\\n#endif\\r\\n\\r\\n#if NUM_CUTPLANES > 0\\r\\n    checkCutPlanes(vWorldPosition);\\r\\n#endif\\r\\n\\r\\n#ifdef MRT_NORMALS\\r\\n\\r\\n    outNormal = vec4(0.0, 0.0, 0.0, 1.0);\\r\\n#endif\\r\\n#include<id_frag>\\r\\n}\\r\\n\";","module.exports = \"\\r\\n\\r\\n#include<line_decl_common>\\r\\n\\r\\nattribute vec2 fields1;\\r\\nattribute vec4 fields2;\\r\\nattribute vec4 flags4b;\\r\\nattribute vec4 layerVp4b;\\r\\n\\r\\n#ifdef HAS_ELLIPTICALS\\r\\nattribute vec3 extraParams;\\r\\n#endif\\r\\n\\r\\n#ifdef USE_INSTANCING\\r\\nattribute vec4 instFlags4b;\\r\\n#endif\\r\\n\\r\\n#ifdef MSDF_TEXTURE_FONT\\r\\nvarying highp vec2 vuv;\\r\\nvarying float isMSDFQuards;\\r\\n#endif\\r\\n\\r\\n#ifdef IMAGE_UV_TEXTURE\\r\\nvarying highp vec2 vuv;\\r\\n#endif\\r\\n\\r\\n#ifdef VIEWPORT_CLIPPING\\r\\nvarying vec2 vPosition;\\r\\n#endif\\r\\n\\r\\nuniform mat4 mvpMatrix;\\r\\n\\r\\nuniform float pixelsPerUnit;\\r\\nuniform float aaRange;\\r\\nuniform float viewportId;\\r\\nuniform float swap;\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n#ifdef HAS_LAYERS\\r\\nuniform sampler2D tLayerMask;\\r\\n#endif\\r\\n\\r\\n#ifdef SELECTION_RENDERER\\r\\nuniform sampler2D tSelectionTexture;\\r\\nuniform vec2 vSelTexSize;\\r\\n#endif\\r\\n\\r\\n#ifdef SELECTION_RENDERER\\r\\nuniform vec4 selectionColor;\\r\\n#endif\\r\\n\\r\\n#ifdef LOADING_ANIMATION\\r\\nuniform float meshAnimTime;\\r\\n#endif\\r\\n\\r\\n#if NUM_CUTPLANES > 0\\r\\nvarying vec3 vWorldPosition;\\r\\n#endif\\r\\n\\r\\nvarying vec4 dbId;\\r\\n\\r\\n#ifdef UNPACK_POSITIONS\\r\\nuniform sampler2D tIdColor;\\r\\nuniform vec2 vIdColorTexSize;\\r\\nuniform vec4 unpackXform;\\r\\nattribute vec2 uvIdColor;\\r\\nfloat unpackLineWeight(float w) {\\r\\n    if (w > 0.5) {\\r\\n        return - (w - 0.5) * 1024.0;\\r\\n    } else {\\r\\n        return w * max(unpackXform.x, unpackXform.y) * 2.0;\\r\\n    }\\r\\n}\\r\\nvec4 getVertexColor() {\\r\\n    float u = (uvIdColor.x + 0.5) / vIdColorTexSize.x;\\r\\n    return texture2D(tIdColor, vec2(u, 0.5));\\r\\n}\\r\\nvec4 getDbId() {\\r\\n    float u = (uvIdColor.y + 0.5) / vIdColorTexSize.x;\\r\\n    vec4 normDbId = texture2D(tIdColor, vec2(u, 0.5));\\r\\n    return normDbId * 255.0;\\r\\n}\\r\\n#else\\r\\nattribute vec4 color4b;\\r\\nattribute vec4 dbId4b;\\r\\nvec4 unpackXform;\\r\\nfloat unpackLineWeight(float w) {\\r\\n    return w;\\r\\n}\\r\\nvec4 getVertexColor() {\\r\\n    return color4b;\\r\\n}\\r\\nvec4 getDbId() {\\r\\n    return dbId4b;\\r\\n}\\r\\n#endif\\r\\n\\r\\n\\r\\nvec2 centralVertex;\\r\\nvec2 offsetPosition;\\r\\n\\r\\nvec2 cos_sin(const float angle) { return vec2(cos(angle), sin(angle)); }\\r\\n\\r\\nvoid min_max(inout vec2 minPt, inout vec2 maxPt, const vec2 p) {\\r\\n    minPt = min(minPt, p);\\r\\n    maxPt = max(maxPt, p);\\r\\n}\\r\\n\\r\\n#if defined(USE_INSTANCING)\\r\\nfloat getVertexId() { return instFlags4b.x; }\\r\\n#else\\r\\nfloat getVertexId() { return flags4b.x; }\\r\\n#endif\\r\\n\\r\\nbool isStartVertex() { return (getVertexId() < VBB_SEG_END_RIGHT); }\\r\\nbool isLeftVertex()  { float id = getVertexId(); return ((id == VBB_SEG_END_LEFT || id == VBB_SEG_START_LEFT)); }\\r\\n\\r\\nstruct SegmentData { float angle, distAlong, distTotal, lineWidthHalf, lineType; };\\r\\nvoid decodeSegmentData(out SegmentData seg) {\\r\\n    seg.angle         = fields2.x * TAU - PI;\\r\\n    seg.distAlong     = fields2.y * max(unpackXform.x, unpackXform.y);\\r\\n    seg.distTotal     = fields2.w;\\r\\n    seg.lineWidthHalf = unpackLineWeight(fields2.z);\\r\\n    seg.lineType      = flags4b.z;\\r\\n}\\r\\n\\r\\nvoid strokeLineSegment() {\\r\\n    SegmentData seg; decodeSegmentData(seg);\\r\\n\\r\\n    float isStartCapVertex = isStartVertex() ? -1.0 :  1.0;\\r\\n    float isLeftSide       = isLeftVertex( ) ?  1.0 : -1.0;\\r\\n\\r\\n\\r\\n    float angleTransverse = seg.angle + isLeftSide * HALF_PI;\\r\\n    float lwAdjustment = fsHalfWidth + aaRange;\\r\\n    vec2 transverseOffset = cos_sin(angleTransverse) * lwAdjustment;\\r\\n    offsetPosition.xy += transverseOffset;\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    float distanceFromStart = max(isStartCapVertex, 0.0) * seg.distAlong;\\r\\n    vec2 along = distanceFromStart * cos_sin(seg.angle);\\r\\n    offsetPosition.xy += along;\\r\\n    centralVertex.xy  += along;\\r\\n\\r\\n\\r\\n    vec2 moveOffset = isStartCapVertex * isLeftSide * vec2(-transverseOffset.y, transverseOffset.x);\\r\\n    offsetPosition.xy -= moveOffset;\\r\\n    centralVertex.xy  -= moveOffset;\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    fsMultipurpose.x = (isStartCapVertex * lwAdjustment) + distanceFromStart;\\r\\n    fsMultipurpose.y = seg.distAlong;\\r\\n    fsMultipurpose.z = seg.distTotal;\\r\\n    fsMultipurpose.w = seg.lineType;\\r\\n\\r\\n    if (seg.lineWidthHalf < 0.0)\\r\\n        fsHalfWidth = -fsHalfWidth;\\r\\n}\\r\\n\\r\\n\\r\\n#ifdef HAS_TRIANGLE_GEOMS\\r\\nstruct TriangleData { vec2 p0, p1, p2; };\\r\\nvoid decodeTriangleData(out TriangleData tri) {\\r\\n\\r\\n    tri.p1 = vec2(fields2.x, fields2.y) * unpackXform.xy + unpackXform.zw;\\r\\n    tri.p2 = fields2.zw * unpackXform.xy + unpackXform.zw;\\r\\n}\\r\\n\\r\\nvoid strokeOneTriangle() {\\r\\n    TriangleData tri; decodeTriangleData(tri);\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    fsHalfWidth = 0.0;\\r\\n    fsMultipurpose.z = 0.0;\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    float vertexId = getVertexId();\\r\\n    if (vertexId == VBB_SEG_END_RIGHT)\\r\\n        offsetPosition.xy = tri.p1;\\r\\n    else if (vertexId == VBB_SEG_END_LEFT)\\r\\n        offsetPosition.xy = tri.p2;\\r\\n}\\r\\n#endif\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n#ifdef HAS_RASTER_QUADS\\r\\nstruct TexQuadData { float angle; vec2 size; };\\r\\nvoid decodeTexQuadData(out TexQuadData quad) {\\r\\n    quad.angle     = fields2.x * TAU;\\r\\n    quad.size   = fields2.yz * max(unpackXform.x, unpackXform.y);\\r\\n}\\r\\n\\r\\nvoid strokeTexQuad() {\\r\\n    TexQuadData quad; decodeTexQuadData(quad);\\r\\n\\r\\n    vec2 corner = vec2(isLeftVertex() ? -1.0 : 1.0, isStartVertex() ? -1.0 : 1.0);\\r\\n\\r\\n    vec2 p      = 0.5 * corner * quad.size;\\r\\n    vec2 rot    = cos_sin(quad.angle);\\r\\n    vec2 offset = vec2(p.x * rot.x - p.y * rot.y, p.x * rot.y + p.y * rot.x);\\r\\n\\r\\n    offsetPosition.xy += offset;\\r\\n\\r\\n    fsMultipurpose.xy = max(vec2(0.0), corner);\\r\\n\\r\\n\\r\\n    fsMultipurpose.z = 1.0;\\r\\n    fsHalfWidth = 0.0;\\r\\n}\\r\\n#endif\\r\\n\\r\\n#if defined(HAS_CIRCLES) || defined(HAS_ELLIPTICALS)\\r\\nstruct ArcData { vec2 c; float start, end, major, minor, tilt; };\\r\\nvoid decodeArcData(out ArcData arc) {\\r\\n    arc.c     = fields1.xy * unpackXform.xy + unpackXform.zw;\\r\\n    arc.start = fields2.x * TAU;\\r\\n    arc.end   = fields2.y * TAU;\\r\\n    arc.major = fields2.w * max(unpackXform.x, unpackXform.y);\\r\\n#if defined(HAS_ELLIPTICALS)\\r\\n    arc.minor = extraParams.x;\\r\\n    arc.tilt  = extraParams.y * TAU;\\r\\n#endif\\r\\n}\\r\\n\\r\\nvoid strokeArc(const ArcData arc) {\\r\\n\\r\\n\\r\\n    float isStart = isStartVertex() ? -1.0 : 1.0;\\r\\n    float isLeft  = isLeftVertex()  ? -1.0 : 1.0;\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    vec2 minPt;\\r\\n    vec2 maxPt;\\r\\n\\r\\n    vec2 angles = vec2(arc.start, arc.end);\\r\\n    vec2 endsX = vec2(arc.c.x) + arc.major * cos(angles);\\r\\n    vec2 endsY = vec2(arc.c.y) + arc.minor * sin(angles);\\r\\n    minPt = maxPt = vec2(endsX.x, endsY.x);\\r\\n    min_max(minPt, maxPt, vec2(endsX.y, endsY.y));\\r\\n\\r\\n    if (arc.end > arc.start) {\\r\\n        if (arc.start < PI_0_5 && arc.end > PI_0_5) {\\r\\n            min_max(minPt, maxPt, vec2(arc.c.x, arc.c.y + arc.minor));\\r\\n        }\\r\\n        if (arc.start < PI && arc.end > PI) {\\r\\n            min_max(minPt, maxPt, vec2(arc.c.x - arc.major, arc.c.y));\\r\\n        }\\r\\n        if (arc.start < PI_1_5 && arc.end > PI_1_5) {\\r\\n            min_max(minPt, maxPt, vec2(arc.c.x, arc.c.y - arc.minor));\\r\\n        }\\r\\n    } else {\\r\\n\\r\\n        min_max(minPt, maxPt, vec2(arc.c.x + arc.major, arc.c.y));\\r\\n\\r\\n\\r\\n\\r\\n        if (arc.start < PI_0_5 || arc.end > PI_0_5) {\\r\\n            min_max(minPt, maxPt, vec2(arc.c.x, arc.c.y + arc.minor));\\r\\n        }\\r\\n        if (arc.start < PI || arc.end > PI) {\\r\\n            min_max(minPt, maxPt, vec2(arc.c.x - arc.major, arc.c.y));\\r\\n        }\\r\\n        if (arc.start < PI_1_5 || arc.end > PI_1_5) {\\r\\n            min_max(minPt, maxPt, vec2(arc.c.x, arc.c.y - arc.minor));\\r\\n        }\\r\\n    }\\r\\n\\r\\n    minPt -= fsHalfWidth + aaRange;\\r\\n    maxPt += fsHalfWidth + aaRange;\\r\\n\\r\\n    offsetPosition.x = (isStart < 0.0) ? minPt.x : maxPt.x;\\r\\n    offsetPosition.y = (isLeft < 0.0)  ? minPt.y : maxPt.y;\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    fsMultipurpose.x = arc.start;\\r\\n    fsMultipurpose.y = -arc.major;\\r\\n    fsMultipurpose.z = arc.end;\\r\\n    fsMultipurpose.w = arc.minor;\\r\\n}\\r\\n#endif\\r\\n\\r\\n#if defined(HAS_CIRCLES)\\r\\n\\r\\nvoid strokeCircularArc() {\\r\\n    ArcData arc; decodeArcData(arc);\\r\\n\\r\\n    float r = arc.major;\\r\\n    if (r * pixelsPerUnit < 0.125)\\r\\n        r = 0.25 * aaRange;\\r\\n    arc.major = arc.minor = r;\\r\\n\\r\\n    strokeArc(arc);\\r\\n}\\r\\n\\r\\n#endif\\r\\n\\r\\n#if defined(HAS_ELLIPTICALS)\\r\\nvoid strokeEllipticalArc() {\\r\\n    ArcData arc; decodeArcData(arc);\\r\\n    strokeArc(arc);\\r\\n}\\r\\n#endif\\r\\n\\r\\nstruct CommonAttribs { vec2 pos; vec4 color; vec2 layerTC, vpTC; float lineWidthHalf, geomType, ghosting; };\\r\\nvoid decodeCommonAttribs(out CommonAttribs attribs) {\\r\\n    attribs.pos           = fields1.xy * unpackXform.xy + unpackXform.zw;\\r\\n    attribs.color         = getVertexColor();\\r\\n    attribs.geomType      = flags4b.y;\\r\\n    attribs.layerTC       = layerVp4b.xy / 255.0;\\r\\n    attribs.vpTC          = layerVp4b.zw / 255.0;\\r\\n    attribs.lineWidthHalf = unpackLineWeight(fields2.z);\\r\\n    attribs.ghosting      = flags4b.w;\\r\\n}\\r\\n\\r\\nvoid strokeIndexedTriangle() {\\r\\n\\r\\n    fsHalfWidth = 0.0;\\r\\n    fsMultipurpose.z = 0.0;\\r\\n}\\r\\n\\r\\n#ifdef SELECTION_RENDERER\\r\\nbool isSelected(const CommonAttribs attribs) {\\r\\n\\r\\n\\r\\n    vec3 oid = getDbId().rgb;\\r\\n\\r\\n\\r\\n    float id01 = oid.r + oid.g * 256.0;\\r\\n    float t = (id01 + 0.5) * (1.0 / 4096.0);\\r\\n    float flrt = floor(t);\\r\\n    float texU = t - flrt;\\r\\n\\r\\n\\r\\n    float id23 = oid.b * (65536.0 / 4096.0) + flrt;\\r\\n    t = (id23 + 0.5) / vSelTexSize.y;\\r\\n    float texV = fract(t);\\r\\n\\r\\n    vec4 selBit = texture2D(tSelectionTexture, vec2(texU, texV));\\r\\n    return selBit.r == 1.0;\\r\\n}\\r\\n#endif\\r\\n\\r\\nbool isLayerOff(const CommonAttribs attribs) {\\r\\n#ifdef HAS_LAYERS\\r\\n    vec4 layerBit = texture2D(tLayerMask, attribs.layerTC);\\r\\n    return (layerBit.r == 0.0);\\r\\n#else\\r\\n    return false;\\r\\n#endif\\r\\n}\\r\\n\\r\\nvec4 getColor(const CommonAttribs attribs) {\\r\\n\\r\\n    if (isLayerOff(attribs)) { return vec4(0.0); }\\r\\n\\r\\n#ifdef SELECTION_RENDERER\\r\\n    if (isSelected(attribs)) { return selectionColor; }\\r\\n    return vec4(0.0);\\r\\n#else\\r\\n    return attribs.color;\\r\\n#endif\\r\\n}\\r\\n\\r\\n#ifdef GAMMA_INPUT\\r\\nvec4 inputToLinear(vec4 c) {\\r\\n    return vec4(vec3(c*c), c.a);\\r\\n}\\r\\n#endif\\r\\n\\r\\nvoid main() {\\r\\n#ifndef UNPACK_POSITIONS\\r\\n    unpackXform = vec4(1.0, 1.0, 0.0, 0.0);\\r\\n#endif\\r\\n\\r\\n    CommonAttribs attribs; decodeCommonAttribs(attribs);\\r\\n#ifdef MSDF_TEXTURE_FONT\\r\\n    vuv = fields2.xy;\\r\\n    isMSDFQuards = 1.0 - abs(sign(attribs.geomType - VBB_GT_MSDF_TRIANGLE_INDEXED));\\r\\n#endif\\r\\n\\r\\n#ifdef IMAGE_UV_TEXTURE\\r\\n    vuv = fields2.xy;\\r\\n#endif\\r\\n\\r\\n    fsColor = getColor(attribs);\\r\\n\\r\\n    #ifdef GAMMA_INPUT\\r\\n    fsColor = inputToLinear(fsColor);\\r\\n    #endif\\r\\n\\r\\n\\r\\n    if (swap != 0.0 ) {\\r\\n\\r\\n        if ( fsColor.r == 0.0 && fsColor.g == 0.0 && fsColor.b == 0.0 )\\r\\n            fsColor.rgb = vec3(1.0,1.0,1.0);\\r\\n\\r\\n        else if ( fsColor.r == 1.0 && fsColor.g == 1.0 && fsColor.b == 1.0 )\\r\\n            fsColor.rgb = vec3(0.0,0.0,0.0);\\r\\n    }\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    centralVertex = offsetPosition = attribs.pos;\\r\\n\\r\\n    float lineWeight = attribs.lineWidthHalf;\\r\\n    if (lineWeight > 0.0) {\\r\\n\\r\\n\\r\\n        if(lineWeight < 0.5 / pixelsPerUnit) {\\r\\n            lineWeight = 0.5 / pixelsPerUnit;\\r\\n        }\\r\\n    }\\r\\n    else {\\r\\n\\r\\n\\r\\n        lineWeight = abs(lineWeight) / pixelsPerUnit;\\r\\n    }\\r\\n\\r\\n    fsHalfWidth = lineWeight;\\r\\n\\r\\n    dbId = getDbId() / 255.0;\\r\\n\\r\\n    fsVpTC     = attribs.vpTC;\\r\\n    fsGhosting = attribs.ghosting;\\r\\n\\r\\n    if      (attribs.geomType == VBB_GT_LINE_SEGMENT)     strokeLineSegment();\\r\\n#ifdef HAS_CIRCLES\\r\\n    else if (attribs.geomType == VBB_GT_ARC_CIRCULAR)     strokeCircularArc();\\r\\n#endif\\r\\n#ifdef HAS_ELLIPTICALS\\r\\n    else if (attribs.geomType == VBB_GT_ARC_ELLIPTICAL)   strokeEllipticalArc();\\r\\n#endif\\r\\n#ifdef HAS_RASTER_QUADS\\r\\n    else if (attribs.geomType == VBB_GT_TEX_QUAD)         strokeTexQuad();\\r\\n#endif\\r\\n#ifdef HAS_TRIANGLE_GEOMS\\r\\n    else if (attribs.geomType == VBB_GT_ONE_TRIANGLE)     strokeOneTriangle();\\r\\n#endif\\r\\n    else if (attribs.geomType == VBB_GT_TRIANGLE_INDEXED) strokeIndexedTriangle();\\r\\n\\r\\n\\r\\n\\r\\n    fsOffsetDirection = offsetPosition - centralVertex;\\r\\n\\r\\n\\r\\n    gl_Position = mvpMatrix * modelMatrix * vec4( offsetPosition.xy, 0.0, 1.0 );\\r\\n\\r\\n#ifdef LOADING_ANIMATION\\r\\n\\r\\n    if (dbId.rgb == vec3(1.0)) {\\r\\n        loadingProgress = 1.0;\\r\\n    } else {\\r\\n        loadingProgress = smoothstep(0.0, 1.0, meshAnimTime);\\r\\n    }\\r\\n#endif\\r\\n\\r\\n#ifdef IMAGE_UV_TEXTURE\\r\\n    fsHalfWidth = 0.0;\\r\\n#endif\\r\\n\\r\\n\\r\\n#if NUM_CUTPLANES > 0\\r\\n    vec4 worldPosition = modelMatrix * vec4( offsetPosition.xy, 0.0, 1.0 );\\r\\n    vWorldPosition = worldPosition.xyz;\\r\\n#endif\\r\\n\\r\\n#ifdef VIEWPORT_CLIPPING\\r\\n    vPosition = offsetPosition.xy;\\r\\n#endif\\r\\n}\\r\\n\";","module.exports = \"\\n#include<line_decl_common>\\n#include<id_decl_frag>\\nuniform highp float pixelsPerUnit;\\nuniform highp float aaRange;\\nuniform float opacity;\\nuniform highp float viewportId;\\nuniform highp float swap;\\nuniform highp float grayscale;\\n#ifdef HAS_LINESTYLES\\nuniform sampler2D tLineStyle;\\nuniform vec2 vLineStyleTexSize;\\n#endif\\n#ifdef VIEWPORT_CLIPPING\\nuniform highp vec4 viewportBounds;\\nvarying highp vec2 vPosition;\\nuniform mat4 mvpMatrix;\\nuniform mat4 modelMatrix;\\n#endif\\nfloat curveGaussian(float r, float width) {\\n    float amt = clamp(abs(r / (width * 1.0)), 0.0, 1.0);\\n    amt = max(amt - 0.0, 0.0);\\n    float exponent = amt * 2.0;\\n    return clamp(exp(-exponent*exponent), 0.0, 1.0);\\n}\\n#ifdef HAS_LINESTYLES\\nfloat getLinePatternPixel(int i, int j) {\\n    return texture2D(tLineStyle, (vec2(i, j) + 0.5) / vLineStyleTexSize).x * 255.0;\\n}\\nfloat getPatternLength(int whichPattern) {\\n    float p1 = getLinePatternPixel(0, whichPattern);\\n    float p2 = getLinePatternPixel(1, whichPattern);\\n    return (p2 * 256.0 + p1);\\n}\\n#endif\\nvoid fillLineSegment() {\\n    float radius = abs(fsHalfWidth);\\n    float parametricDistance = fsMultipurpose.x;\\n    float segmentLength      = fsMultipurpose.y;\\n    float totalDistance      = fsMultipurpose.z;\\n#ifdef LOADING_ANIMATION\\n    float distFromStart = parametricDistance / segmentLength;\\n    if (loadingProgress < 1.0 && distFromStart > loadingProgress) {\\n        discard;\\n    }\\n#endif\\n#ifdef HAS_LINESTYLES\\n    int whichPattern         = int(fsMultipurpose.w);\\n    if (whichPattern > 0) {\\n        const float TEX_TO_UNIT = 1.0 / 96.0;\\n        float patternScale;\\n        if (fsHalfWidth < 0.0) {\\n            patternScale = LTSCALE;\\n        } else {\\n            patternScale = LTSCALE * TEX_TO_UNIT * pixelsPerUnit;\\n        }\\n        float patLen = patternScale * getPatternLength(whichPattern);\\n        float phase = mod((totalDistance + parametricDistance), patLen);\\n        bool onPixel = true;\\n        float radiusPixels = radius + aaRange;\\n        for (int i=2; i<MAX_LINESTYLE_LENGTH; i+=2) {\\n            float on = getLinePatternPixel(i, whichPattern);\\n            if (on == 1.0) on = 0.0;\\n            on *= patternScale;\\n            onPixel = true;\\n            phase -= on;\\n            if (phase < 0.0) {\\n                break;\\n            }\\n            else if (phase <= radiusPixels) {\\n                onPixel = false;\\n                break;\\n            }\\n            float off = getLinePatternPixel(i+1, whichPattern);\\n            if (off <= 1.0) off = 0.0;\\n            off *= patternScale;\\n            onPixel = false;\\n            phase -= off;\\n            if (phase < -radiusPixels)\\n                discard;\\n            if (phase <= 0.0)\\n                break;\\n        }\\n        if (!onPixel && (abs(phase) <= radiusPixels)) {\\n            segmentLength = 0.0;\\n            parametricDistance = phase;\\n        }\\n    }\\n#endif\\n    float dist;\\n    float offsetLength2 = dot(fsOffsetDirection, fsOffsetDirection);\\n    float ltz = max(0.0, sign(-parametricDistance));\\n    float gtsl = max(0.0, sign(parametricDistance - segmentLength));\\n    float d = (ltz + gtsl) * (parametricDistance - gtsl * segmentLength);\\n    dist = sqrt(max(0.0, offsetLength2 + d*d));\\n    float range =  dist - radius;\\n    if (range > aaRange) {\\n        discard;\\n    }\\n    gl_FragColor = fsColor;\\n    if (range > -aaRange)\\n        gl_FragColor.a *= curveGaussian(range+aaRange, aaRange * 2.0);\\n}\\n#ifdef LOADING_ANIMATION\\n    void fillTriangle() { gl_FragColor = vec4(fsColor.rgb, fsColor.a * loadingProgress); }\\n#else\\n    void fillTriangle() { gl_FragColor = fsColor; }\\n#endif\\n#if NUM_CUTPLANES > 0\\nvarying highp vec3 vWorldPosition;\\n#endif\\n#include<cutplanes>\\nfloat getSide(vec2 a, vec2 b, vec2 c) {\\n    return sign((b.x - a.x) * (c.y - a.y) - (b.y - a.y) * (c.x - a.x));\\n}\\nvoid main() {\\n    if (fsColor == vec4(0.0)) {\\n        discard;\\n    }\\n#ifdef VIEWPORT_CLIPPING\\n    vec2 bottomLeft = (mvpMatrix * modelMatrix * vec4(viewportBounds.xy, 0., 1.)).xy;\\n    vec2 bottomRight = (mvpMatrix * modelMatrix * vec4(viewportBounds.zy, 0., 1.)).xy;\\n    vec2 topRight = (mvpMatrix * modelMatrix * vec4(viewportBounds.zw, 0., 1.)).xy;\\n    vec2 topLeft = (mvpMatrix * modelMatrix * vec4(viewportBounds.xw, 0., 1.)).xy;\\n    float side = getSide(topLeft, topRight, bottomLeft);\\n    if (side * getSide(topRight, bottomRight, vPosition) < 0.0 ||\\n        side * getSide(bottomRight, bottomLeft, vPosition) < 0.0 ||\\n        side * getSide(bottomLeft, topLeft, vPosition) < 0.0 ||\\n        side * getSide(topLeft, topRight, vPosition) < 0.0) {\\n        discard;\\n    }\\n#endif\\n    if (fsHalfWidth == 0.0) {\\n        fillTriangle();\\n    }\\n    else\\n        fillLineSegment();\\n    float writeId = 1.0;\\n    gl_FragColor.a *= opacity;\\n    if (gl_FragColor.a == 0.0) {\\n        discard;\\n    }\\n    if (fsGhosting != 0.0 || \\n            ((viewportId != 0.0) && (abs(fsVpTC.x * 255.0 + fsVpTC.y) >= 0.5 && abs(fsVpTC.x * 255.0 + fsVpTC.y - viewportId) >= 0.5))) {\\n        writeId = 0.0;\\n        gl_FragColor.a *= ((swap == 1.0) ? 0.21 : 0.1);\\n    }\\n#ifndef SELECTION_RENDERER\\n    if (grayscale != 0.0) {\\n        const vec3 rgb2grey = vec3(0.299, 0.587, 0.114);\\n        float gray = dot(gl_FragColor.rgb, rgb2grey);\\n        gl_FragColor.rgb = vec3(gray);\\n    }\\n#endif\\n#if NUM_CUTPLANES > 0\\n    checkCutPlanes(vWorldPosition);\\n#endif\\n#ifdef MRT_NORMALS\\n    outNormal = vec4(0.0, 0.0, 0.0, 1.0);\\n#endif\\n#include<id_frag>\\n}\\n\";","module.exports = \"\\n#include<line_decl_common>\\nattribute vec2 fields1;\\nattribute vec4 fields2;\\nattribute vec4 flags4b;\\nattribute vec4 layerVp4b;\\n#ifdef USE_INSTANCING\\nattribute vec4 instFlags4b;\\n#endif\\n#ifdef VIEWPORT_CLIPPING\\nvarying vec2 vPosition;\\n#endif\\nuniform mat4 mvpMatrix;\\nuniform float pixelsPerUnit;\\nuniform float aaRange;\\nuniform vec2 size;\\nuniform float viewportId;\\nuniform float swap;\\n#ifdef HAS_LAYERS\\nuniform sampler2D tLayerMask;\\n#endif\\n#ifdef SELECTION_RENDERER\\nuniform sampler2D tSelectionTexture;\\nuniform vec2 vSelTexSize;\\n#endif\\n#ifdef SELECTION_RENDERER\\nuniform vec4 selectionColor;\\n#endif\\n#ifdef LOADING_ANIMATION\\nuniform float meshAnimTime;\\n#endif\\n#if NUM_CUTPLANES > 0\\nvarying vec3 vWorldPosition;\\n#endif\\nvarying vec4 dbId;\\n#ifdef UNPACK_POSITIONS\\nuniform sampler2D tIdColor;\\nuniform vec2 vIdColorTexSize;\\nuniform vec4 unpackXform;\\nattribute vec2 uvIdColor;\\nfloat unpackLineWeight(float w) {\\n    if (w > 0.5) {\\n        return - (w - 0.5) * 1024.0;\\n    } else {\\n        return w * max(unpackXform.x, unpackXform.y) * 2.0;\\n    }\\n}\\nvec4 getVertexColor() {\\n    float u = (uvIdColor.x + 0.5) / vIdColorTexSize.x;\\n    return texture2D(tIdColor, vec2(u, 0.5));\\n}\\nvec4 getDbId() {\\n    float u = (uvIdColor.y + 0.5) / vIdColorTexSize.x;\\n    vec4 normDbId = texture2D(tIdColor, vec2(u, 0.5));\\n    return normDbId * 255.0;\\n}\\n#else\\nattribute vec4 color4b;\\nattribute vec4 dbId4b;\\nvec4 unpackXform;\\nfloat unpackLineWeight(float w) {\\n    return w;\\n}\\nvec4 getVertexColor() {\\n    return color4b;\\n}\\nvec4 getDbId() {\\n    return dbId4b;\\n}\\n#endif\\nvec2 centralVertex;\\nvec2 offsetPosition;\\nvec2 offsetPosDepth;\\nvec2 cos_sin(const float angle) { return vec2(cos(angle), sin(angle)); }\\nvoid min_max(inout vec2 minPt, inout vec2 maxPt, const vec2 p) {\\n    minPt = min(minPt, p);\\n    maxPt = max(maxPt, p);\\n}\\n#if defined(USE_INSTANCING)\\nfloat getVertexId() { return instFlags4b.x; }\\n#else\\nfloat getVertexId() { return flags4b.x; }\\n#endif\\nbool isStartVertex() { return (getVertexId() < VBB_SEG_END_RIGHT); }\\nbool isLeftVertex()  { float id = getVertexId(); return ((id == VBB_SEG_END_LEFT || id == VBB_SEG_START_LEFT)); }\\nstruct SegmentData { float angle, distAlong, distTotal, lineWidthHalf, lineType; };\\nvoid decodeSegmentData(out SegmentData seg) {\\n    seg.angle         = fields2.x * TAU - PI;\\n    seg.distAlong     = fields2.y * max(unpackXform.x, unpackXform.y);\\n    seg.distTotal     = fields2.w;\\n    seg.lineWidthHalf = unpackLineWeight(fields2.z);\\n    seg.lineType      = flags4b.z;\\n}\\nvoid strokeLineSegment() {\\n    SegmentData seg; decodeSegmentData(seg);\\n    float isStartCapVertex = isStartVertex() ? -1.0 :  1.0;\\n    float isLeftSide       = isLeftVertex( ) ?  1.0 : -1.0;\\n    vec4 startPosition = (mvpMatrix * modelMatrix * vec4(centralVertex.xy, 0.0, 1.0));\\n    float distanceAlong = seg.distAlong;\\n    vec2 along = distanceAlong * cos_sin(seg.angle);\\n    vec4 endPosition = (mvpMatrix * modelMatrix * vec4(centralVertex.xy + along, 0.0, 1.0));\\n    vec2 screenStart = startPosition.xy * 0.5 * size / startPosition.w;\\n    vec2 screenEnd = endPosition.xy * 0.5 * size / endPosition.w;\\n    if (isStartCapVertex < 0.0) {\\n        offsetPosition = centralVertex = screenStart;\\n        offsetPosDepth = startPosition.zw;\\n    } else {\\n        offsetPosition = centralVertex = screenEnd;\\n        offsetPosDepth = endPosition.zw;\\n    }\\n    vec2 screenDelta = screenEnd - screenStart;\\n    float screenAngle = (distanceAlong == 0.0) ? 0.0 : atan(screenDelta.y, screenDelta.x);\\n    float angleTransverse = screenAngle - isLeftSide * HALF_PI;\\n    float lwAdjustment = fsHalfWidth + aaRange;\\n    vec2 transverseOffset = cos_sin(angleTransverse) * lwAdjustment;\\n    offsetPosition += transverseOffset;\\n    vec2 moveOffset = isStartCapVertex * isLeftSide * vec2(-transverseOffset.y, transverseOffset.x);\\n    offsetPosition += moveOffset;\\n    centralVertex += moveOffset;\\n    float distanceFromStart = max(0.0, isStartCapVertex) * length(screenDelta);\\n    fsMultipurpose.x = (isStartCapVertex * lwAdjustment) + distanceFromStart;\\n    fsMultipurpose.y = length(screenDelta);\\n    fsMultipurpose.z = seg.distTotal;\\n    fsMultipurpose.w = seg.lineType;\\n    if (seg.lineWidthHalf < 0.0)\\n        fsHalfWidth = -fsHalfWidth;\\n    fsOffsetDirection = offsetPosition - centralVertex;\\n    gl_Position = vec4(2.0 * offsetPosition / size * offsetPosDepth.y, offsetPosDepth.xy);\\n}\\nstruct CommonAttribs { vec2 pos; vec4 color; vec2 layerTC, vpTC; float lineWidthHalf, geomType, ghosting; };\\nvoid decodeCommonAttribs(out CommonAttribs attribs) {\\n    attribs.pos           = fields1.xy * unpackXform.xy + unpackXform.zw;\\n    attribs.color         = getVertexColor();\\n    attribs.geomType      = flags4b.y;\\n    attribs.layerTC       = layerVp4b.xy / 255.0;\\n    attribs.vpTC          = layerVp4b.zw / 255.0;\\n    attribs.lineWidthHalf = unpackLineWeight(fields2.z);\\n    attribs.ghosting      = flags4b.w;\\n}\\nvoid strokeIndexedTriangle() {\\n    fsHalfWidth = 0.0;\\n    fsMultipurpose.z = 0.0;\\n    gl_Position = (mvpMatrix * modelMatrix * vec4(centralVertex.xy, 0.0, 1.0));\\n}\\n#ifdef SELECTION_RENDERER\\nbool isSelected(const CommonAttribs attribs) {\\n    vec3 oid = getDbId().rgb;\\n    float id01 = oid.r + oid.g * 256.0;\\n    float t = (id01 + 0.5) * (1.0 / 4096.0);\\n    float flrt = floor(t);\\n    float texU = t - flrt;\\n    float id23 = oid.b * (65536.0 / 4096.0) + flrt;\\n    t = (id23 + 0.5) / vSelTexSize.y;\\n    float texV = fract(t);\\n    vec4 selBit = texture2D(tSelectionTexture, vec2(texU, texV));\\n    return selBit.r == 1.0;\\n}\\n#endif\\nbool isLayerOff(const CommonAttribs attribs) {\\n#ifdef HAS_LAYERS\\n    vec4 layerBit = texture2D(tLayerMask, attribs.layerTC);\\n    return (layerBit.r == 0.0);\\n#else\\n    return false;\\n#endif\\n}\\nvec4 getColor(const CommonAttribs attribs) {\\n    if (isLayerOff(attribs)) { return vec4(0.0); }\\n#ifdef SELECTION_RENDERER\\n    if (isSelected(attribs)) { return selectionColor; }\\n    return vec4(0.0);\\n#else\\n    return attribs.color;\\n#endif\\n}\\n#ifdef GAMMA_INPUT\\nvec4 inputToLinear(vec4 c) {\\n    return vec4(vec3(c*c), c.a);\\n}\\n#endif\\nvoid main() {\\n#ifndef UNPACK_POSITIONS\\n    unpackXform = vec4(1.0, 1.0, 0.0, 0.0);\\n#endif\\n    CommonAttribs attribs; decodeCommonAttribs(attribs);\\n    fsColor = getColor(attribs);\\n    #ifdef GAMMA_INPUT\\n    fsColor = inputToLinear(fsColor);\\n    #endif\\n    if (swap != 0.0 ) {\\n        if ( fsColor.r == 0.0 && fsColor.g == 0.0 && fsColor.b == 0.0 )\\n            fsColor.rgb = vec3(1.0,1.0,1.0);\\n        else if ( fsColor.r == 1.0 && fsColor.g == 1.0 && fsColor.b == 1.0 )\\n            fsColor.rgb = vec3(0.0,0.0,0.0);\\n    }\\n    centralVertex = offsetPosition = attribs.pos;\\n    float lineWeight = attribs.lineWidthHalf;\\n    if (lineWeight > 0.0) {\\n        lineWeight = max(0.5, lineWeight * pixelsPerUnit);\\n    }\\n    else {\\n        lineWeight = max(0.5, abs(lineWeight));\\n    }\\n    fsHalfWidth = lineWeight;\\n    dbId = dbId4b / 255.0;\\n    fsVpTC     = attribs.vpTC;\\n    fsGhosting = attribs.ghosting;\\n#ifdef LOADING_ANIMATION\\n    if (dbId.rgb == vec3(1.0)) {\\n        loadingProgress = 1.0;\\n    } else {\\n        loadingProgress = smoothstep(0.0, 1.0, meshAnimTime);\\n    }\\n#endif\\n    if      (attribs.geomType == VBB_GT_LINE_SEGMENT)     strokeLineSegment();\\n    else strokeIndexedTriangle();\\n#if NUM_CUTPLANES > 0\\n    vec4 worldPosition = modelMatrix * vec4( offsetPosition.xy, 0.0, 1.0 );\\n    vWorldPosition = worldPosition.xyz;\\n#endif\\n#ifdef VIEWPORT_CLIPPING\\n    vPosition = gl_Position.xy;\\n#endif\\n}\\n\";","module.exports = \"varying highp vec3 vNormal;\\nvarying highp float depth;\\n#if NUM_CUTPLANES > 0\\nvarying vec3 vWorldPosition;\\n#endif\\n#include<cutplanes>\\nvoid main() {\\n#if NUM_CUTPLANES > 0\\n    checkCutPlanes(vWorldPosition);\\n#endif\\n    vec3 n = vNormal;\\n    n = n * ( -1.0 + 2.0 * float( gl_FrontFacing ) );\\n    n = normalize( n );\\n    gl_FragColor = vec4(n.x, n.y, depth, 1.0);\\n}\\n\";","module.exports = \"varying vec3 vNormal;\\nvarying float depth;\\n#if NUM_CUTPLANES > 0\\nvarying vec3 vWorldPosition;\\n#endif\\n#include<pack_normals>\\n#include<instancing_decl_vert>\\nvoid main() {\\n#ifdef UNPACK_NORMALS\\n    vec3 objectNormal = decodeNormal(normal);\\n#else\\n    vec3 objectNormal = normal;\\n#endif\\n#ifdef FLIP_SIDED\\n    objectNormal = -objectNormal;\\n#endif\\n    objectNormal = getInstanceNormal(objectNormal);\\n    vec3 instPos = getInstancePos(position);\\n    vec3 transformedNormal = normalMatrix * objectNormal;\\n    vNormal = normalize( transformedNormal );\\n#if NUM_CUTPLANES > 0\\n    vec4 worldPosition = modelMatrix * vec4( instPos, 1.0 );\\n    vWorldPosition = worldPosition.xyz;\\n#endif\\n    vec4 mvPosition = modelViewMatrix * vec4( instPos, 1.0 );\\n    depth = mvPosition.z;\\n    vec4 p_Position = projectionMatrix * mvPosition;\\n    gl_Position = p_Position;\\n}\\n\";","module.exports = \"uniform vec3 diffuse;\\r\\nuniform float opacity;\\r\\n\\r\\nuniform vec3 emissive;\\r\\nuniform vec3 specular;\\r\\nuniform float shininess;\\r\\n\\r\\n#include<env_sample>\\r\\n\\r\\n#ifdef USE_COLOR\\r\\nvarying vec3 vColor;\\r\\n#endif\\r\\n\\r\\n#ifdef GAMMA_INPUT\\r\\nvec3 InputToLinear(vec3 c) {\\r\\n    return c * c;\\r\\n}\\r\\nfloat InputToLinear(float c) {\\r\\n    return c * c;\\r\\n}\\r\\n#else\\r\\nvec3 InputToLinear(vec3 c) {\\r\\n    return c;\\r\\n}\\r\\nfloat InputToLinear(float c) {\\r\\n    return c;\\r\\n}\\r\\n#endif\\r\\n\\r\\n#if defined( USE_MAP ) || defined( USE_SPECULARMAP )\\r\\nvarying vec2 vUv;\\r\\n#endif\\r\\n\\r\\n#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP )\\r\\nvarying vec2 vUvBump;\\r\\n#endif\\r\\n\\r\\n#if defined( USE_ALPHAMAP )\\r\\nvarying vec2 vUvAlpha;\\r\\n#endif\\r\\n\\r\\n#ifdef USE_MAP\\r\\nuniform sampler2D map;\\r\\n#endif\\r\\n\\r\\n#if TONEMAP_OUTPUT > 0\\r\\nuniform float exposureBias;\\r\\n#include<tonemap>\\r\\n#endif\\r\\n\\r\\n#if defined(IRR_RGBM) || defined(ENV_RGBM) || defined(ENV_GAMMA) || defined(IRR_GAMMA)\\r\\nuniform float envMapExposure;\\r\\n#endif\\r\\n\\r\\n#ifdef USE_FOG\\r\\nuniform vec3 fogColor;\\r\\nuniform float fogNear;\\r\\nuniform float fogFar;\\r\\n#endif\\r\\n#include<id_decl_frag>\\r\\n#include<theming_decl_frag>\\r\\n#include<shadowmap_decl_frag>\\r\\n\\r\\n#ifdef USE_ENVMAP\\r\\n\\r\\nuniform float reflMipIndex;\\r\\n\\r\\nuniform float reflectivity;\\r\\nuniform samplerCube envMap;\\r\\n\\r\\n#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP )\\r\\n\\r\\nuniform float refractionRatio;\\r\\n\\r\\n#endif\\r\\n\\r\\nvec3 sampleReflection(vec3 dir, float mipIndex) {\\r\\n\\r\\n    vec3 adjDir = adjustLookupVector(dir);\\r\\n\\r\\n#ifdef ENV_GAMMA\\r\\n\\r\\n#ifdef HAVE_TEXTURE_LOD\\r\\n    vec4 envTexColor = textureCubeLodEXT( envMap, adjDir, mipIndex );\\r\\n#else\\r\\n\\r\\n\\r\\n    vec4 envTexColor = textureCube( envMap, adjDir, mipIndex );\\r\\n#endif\\r\\n\\r\\n    return GammaDecode(envTexColor, envMapExposure);\\r\\n\\r\\n#elif defined(ENV_RGBM)\\r\\n\\r\\n#ifdef HAVE_TEXTURE_LOD\\r\\n    vec4 envTexColor = textureCubeLodEXT( envMap, adjDir, mipIndex );\\r\\n#else\\r\\n\\r\\n\\r\\n    vec4 envTexColor = textureCube( envMap, adjDir, mipIndex );\\r\\n#endif\\r\\n\\r\\n    return RGBMDecode(envTexColor, envMapExposure);\\r\\n\\r\\n#else\\r\\n\\r\\n\\r\\n\\r\\n    vec4 envTexColor = textureCube( envMap, adjDir );\\r\\n    vec3 cubeColor = envTexColor.xyz;\\r\\n\\r\\n#ifdef GAMMA_INPUT\\r\\n    cubeColor *= cubeColor;\\r\\n#endif\\r\\n\\r\\n    return cubeColor;\\r\\n\\r\\n#endif\\r\\n\\r\\n}\\r\\n\\r\\n#endif\\r\\n\\r\\n\\r\\nuniform vec3 ambientLightColor;\\r\\n\\r\\n#if MAX_DIR_LIGHTS > 0\\r\\n\\r\\nuniform vec3 directionalLightColor[ MAX_DIR_LIGHTS ];\\r\\nuniform vec3 directionalLightDirection[ MAX_DIR_LIGHTS ];\\r\\n\\r\\n#endif\\r\\n\\r\\n#if MAX_POINT_LIGHTS > 0\\r\\n\\r\\nuniform vec3 pointLightColor[ MAX_POINT_LIGHTS ];\\r\\n\\r\\nuniform vec3 pointLightPosition[ MAX_POINT_LIGHTS ];\\r\\nuniform float pointLightDistance[ MAX_POINT_LIGHTS ];\\r\\n\\r\\n#endif\\r\\n\\r\\n#if MAX_SPOT_LIGHTS > 0\\r\\n\\r\\nuniform vec3 spotLightColor[ MAX_SPOT_LIGHTS ];\\r\\nuniform vec3 spotLightPosition[ MAX_SPOT_LIGHTS ];\\r\\nuniform vec3 spotLightDirection[ MAX_SPOT_LIGHTS ];\\r\\nuniform float spotLightAngleCos[ MAX_SPOT_LIGHTS ];\\r\\nuniform float spotLightExponent[ MAX_SPOT_LIGHTS ];\\r\\n\\r\\nuniform float spotLightDistance[ MAX_SPOT_LIGHTS ];\\r\\n\\r\\n#endif\\r\\n\\r\\n#ifdef USE_IRRADIANCEMAP\\r\\nuniform samplerCube irradianceMap;\\r\\n#endif\\r\\n\\r\\n#if MAX_SPOT_LIGHTS > 0 || NUM_CUTPLANES > 0\\r\\nvarying highp vec3 vWorldPosition;\\r\\n#endif\\r\\n\\r\\nvarying highp vec3 vViewPosition;\\r\\n#ifndef FLAT_SHADED\\r\\nvarying highp vec3 vNormal;\\r\\n#endif\\r\\n\\r\\n#ifdef USE_BUMPMAP\\r\\n\\r\\nuniform sampler2D bumpMap;\\r\\nuniform float bumpScale;\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\nvec2 dHdxy_fwd() {\\r\\n\\r\\n    vec2 dSTdx = dFdx( vUvBump );\\r\\n    vec2 dSTdy = dFdy( vUvBump );\\r\\n\\r\\n    float Hll = bumpScale * GET_BUMPMAP(vUvBump).x;\\r\\n    float dBx = bumpScale * GET_BUMPMAP(vUvBump + dSTdx).x - Hll;\\r\\n    float dBy = bumpScale * GET_BUMPMAP(vUvBump + dSTdy).x - Hll;\\r\\n\\r\\n    return vec2( dBx, dBy );\\r\\n\\r\\n}\\r\\n\\r\\nvec3 perturbNormalArb( vec3 surf_pos, vec3 surf_norm, vec2 dHdxy ) {\\r\\n\\r\\n    vec3 vSigmaX = dFdx( surf_pos );\\r\\n    vec3 vSigmaY = dFdy( surf_pos );\\r\\n    vec3 vN = surf_norm;\\r\\n\\r\\n    vec3 R1 = cross( vSigmaY, vN );\\r\\n    vec3 R2 = cross( vN, vSigmaX );\\r\\n\\r\\n    float fDet = dot( vSigmaX, R1 );\\r\\n\\r\\n    vec3 vGrad = sign( fDet ) * ( dHdxy.x * R1 + dHdxy.y * R2 );\\r\\n    return normalize( abs( fDet ) * surf_norm - vGrad );\\r\\n\\r\\n}\\r\\n\\r\\n#endif\\r\\n\\r\\n\\r\\n#ifdef USE_NORMALMAP\\r\\n\\r\\nuniform sampler2D normalMap;\\r\\nuniform vec2 normalScale;\\r\\n\\r\\n\\r\\n\\r\\n\\r\\nvec3 perturbNormal2Arb( vec3 eye_pos, vec3 surf_norm ) {\\r\\n\\r\\n    vec3 q0 = dFdx( eye_pos.xyz );\\r\\n    vec3 q1 = dFdy( eye_pos.xyz );\\r\\n    vec2 st0 = dFdx( vUvBump.st );\\r\\n    vec2 st1 = dFdy( vUvBump.st );\\r\\n\\r\\n    vec3 S = normalize(  q0 * st1.t - q1 * st0.t );\\r\\n    vec3 T = normalize( -q0 * st1.s + q1 * st0.s );\\r\\n    vec3 N = normalize( surf_norm );\\r\\n\\r\\n    vec3 mapN = GET_NORMALMAP(vUvBump).xyz * 2.0 - 1.0;\\r\\n    mapN.xy = normalScale * mapN.xy;\\r\\n    mat3 tsn = mat3( S, T, N );\\r\\n    return normalize( tsn * mapN );\\r\\n\\r\\n}\\r\\n\\r\\n#endif\\r\\n\\r\\n\\r\\n#ifdef USE_SPECULARMAP\\r\\nuniform sampler2D specularMap;\\r\\n#endif\\r\\n\\r\\n#ifdef USE_ALPHAMAP\\r\\nuniform sampler2D alphaMap;\\r\\n#endif\\r\\n\\r\\n#include<hatch_pattern>\\r\\n\\r\\nvec3 Schlick_v3(vec3 v, float cosHV) {\\r\\n    float facing = max(1.0 - cosHV, 0.0);\\r\\n    return v + (1.0 - v) * pow(facing, 5.0);\\r\\n}\\r\\n\\r\\nfloat Schlick_f(float v, float cosHV) {\\r\\n    float facing = max(1.0 - cosHV, 0.0);\\r\\n    return v + ( 1.0 - v ) * pow(facing, 5.0);\\r\\n}\\r\\n\\r\\n#include<cutplanes>\\r\\n\\r\\nvoid main() {\\r\\n\\r\\n#if NUM_CUTPLANES > 0\\r\\n    checkCutPlanes(vWorldPosition);\\r\\n#endif\\r\\n\\r\\n    gl_FragColor = vec4( vec3 ( 1.0 ), opacity );\\r\\n\\r\\n#ifdef USE_MAP\\r\\n    vec4 texelColor = GET_MAP(vUv);\\r\\n#ifdef MAP_INVERT\\r\\n    texelColor.xyz = 1.0-texelColor.xyz;\\r\\n#endif\\r\\n#ifdef GAMMA_INPUT\\r\\n    texelColor.xyz *= texelColor.xyz;\\r\\n#endif\\r\\n    gl_FragColor = gl_FragColor * texelColor;\\r\\n#endif\\r\\n\\r\\n#ifdef USE_ALPHAMAP\\r\\n    vec4 texelAlpha = GET_ALPHAMAP(vUvAlpha);\\r\\n    gl_FragColor.a *= texelAlpha.r;\\r\\n#endif\\r\\n\\r\\n#ifdef ALPHATEST\\r\\n    if ( gl_FragColor.a < ALPHATEST ) discard;\\r\\n#endif\\r\\n\\r\\n    float specularStrength;\\r\\n\\r\\n#ifdef USE_SPECULARMAP\\r\\n    vec4 texelSpecular = GET_SPECULARMAP(vUv);\\r\\n    specularStrength = texelSpecular.r;\\r\\n#else\\r\\n    specularStrength = 1.0;\\r\\n#endif\\r\\n\\r\\n#ifndef FLAT_SHADED\\r\\n    vec3 normal = normalize( vNormal );\\r\\n#ifdef DOUBLE_SIDED\\r\\n\\r\\n#endif\\r\\n#else\\r\\n    vec3 fdx = dFdx( vViewPosition );\\r\\n    vec3 fdy = dFdy( vViewPosition );\\r\\n    vec3 normal = normalize( cross( fdx, fdy ) );\\r\\n#endif\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    vec3 viewDirection;\\r\\n    if (projectionMatrix[3][3] == 0.0) {\\r\\n        viewDirection = normalize( vViewPosition );\\r\\n    } else {\\r\\n        viewDirection = vec3(0.0, 0.0, 1.0);\\r\\n    }\\r\\n    normal = faceforward(normal, -viewDirection, normal);\\r\\n\\r\\n    vec3 geomNormal = normal;\\r\\n\\r\\n#ifdef USE_NORMALMAP\\r\\n    normal = perturbNormal2Arb( -vViewPosition, normal );\\r\\n#elif defined( USE_BUMPMAP )\\r\\n    normal = perturbNormalArb( -vViewPosition, normal, dHdxy_fwd() );\\r\\n#endif\\r\\n\\r\\n    vec3 totalDiffuse = vec3( 0.0 );\\r\\n    vec3 totalSpecular = vec3( 0.0 );\\r\\n\\r\\n\\r\\n\\r\\n    float shininessB = shininess * 4.0;\\r\\n\\r\\n#if MAX_POINT_LIGHTS > 0\\r\\n\\r\\n    vec3 pointDiffuse  = vec3( 0.0 );\\r\\n    vec3 pointSpecular = vec3( 0.0 );\\r\\n\\r\\n    for ( int i = 0; i < MAX_POINT_LIGHTS; i ++ ) {\\r\\n\\r\\n        vec4 lPosition = viewMatrix * vec4( pointLightPosition[ i ], 1.0 );\\r\\n        vec3 lVector = lPosition.xyz + vViewPosition.xyz;\\r\\n\\r\\n        float lDistance = 1.0;\\r\\n        if ( pointLightDistance[ i ] > 0.0 )\\r\\n            lDistance = 1.0 - min( ( length( lVector ) / pointLightDistance[ i ] ), 1.0 );\\r\\n\\r\\n        lVector = normalize( lVector );\\r\\n\\r\\n\\r\\n\\r\\n        float dotProduct = dot( normal, lVector );\\r\\n\\r\\n        float pointDiffuseWeight = max( dotProduct, 0.0 );\\r\\n\\r\\n\\r\\n        pointDiffuse  += InputToLinear(diffuse) * InputToLinear(pointLightColor[ i ]) * pointDiffuseWeight * lDistance;\\r\\n\\r\\n\\r\\n\\r\\n        vec3 pointHalfVector = normalize( lVector + viewDirection );\\r\\n        float pointDotNormalHalf = max( dot( normal, pointHalfVector ), 0.0 );\\r\\n\\r\\n        float pointSpecularWeight = specularStrength * max( pow( pointDotNormalHalf, shininessB ), 0.0 );\\r\\n        float specularNormalization = shininessB * 0.125 + 0.25;\\r\\n        vec3 schlick = Schlick_v3(InputToLinear(specular), dot( lVector, pointHalfVector ) );\\r\\n        pointSpecular += schlick * InputToLinear(pointLightColor[ i ]) * pointSpecularWeight * pointDiffuseWeight * lDistance * specularNormalization ;\\r\\n\\r\\n    }\\r\\n\\r\\n    totalDiffuse += pointDiffuse;\\r\\n    totalSpecular += pointSpecular;\\r\\n\\r\\n#endif\\r\\n\\r\\n#if MAX_SPOT_LIGHTS > 0\\r\\n\\r\\n    vec3 spotDiffuse  = vec3( 0.0 );\\r\\n    vec3 spotSpecular = vec3( 0.0 );\\r\\n\\r\\n    for ( int i = 0; i < MAX_SPOT_LIGHTS; i ++ ) {\\r\\n\\r\\n        vec4 lPosition = viewMatrix * vec4( spotLightPosition[ i ], 1.0 );\\r\\n        vec3 lVector = lPosition.xyz + vViewPosition.xyz;\\r\\n\\r\\n        float lDistance = 1.0;\\r\\n        if ( spotLightDistance[ i ] > 0.0 )\\r\\n            lDistance = 1.0 - min( ( length( lVector ) / spotLightDistance[ i ] ), 1.0 );\\r\\n\\r\\n        lVector = normalize( lVector );\\r\\n\\r\\n        float spotEffect = dot( spotLightDirection[ i ], normalize( spotLightPosition[ i ] - vWorldPosition ) );\\r\\n\\r\\n        if ( spotEffect > spotLightAngleCos[ i ] ) {\\r\\n\\r\\n            spotEffect = max( pow( spotEffect, spotLightExponent[ i ] ), 0.0 );\\r\\n\\r\\n\\r\\n\\r\\n            float dotProduct = dot( normal, lVector );\\r\\n\\r\\n            float spotDiffuseWeight = max( dotProduct, 0.0 );\\r\\n\\r\\n            spotDiffuse += InputToLinear(diffuse) * InputToLinear(spotLightColor[ i ]) * spotDiffuseWeight * lDistance * spotEffect;\\r\\n\\r\\n\\r\\n\\r\\n            vec3 spotHalfVector = normalize( lVector + viewDirection );\\r\\n            float spotDotNormalHalf = max( dot( normal, spotHalfVector ), 0.0 );\\r\\n            float spotSpecularWeight = specularStrength * max( pow( spotDotNormalHalf, shininessB ), 0.0 );\\r\\n\\r\\n            float specularNormalization = shininessB * 0.125 + 0.25;\\r\\n            vec3 schlick = Schlick_v3(InputToLinear(specular), dot( lVector, spotHalfVector ) );\\r\\n            spotSpecular += schlick * InputToLinear(spotLightColor[ i ]) * spotSpecularWeight * spotDiffuseWeight * lDistance * specularNormalization * spotEffect;\\r\\n        }\\r\\n\\r\\n    }\\r\\n\\r\\n    totalDiffuse += spotDiffuse;\\r\\n    totalSpecular += spotSpecular;\\r\\n\\r\\n#endif\\r\\n\\r\\n#if MAX_DIR_LIGHTS > 0\\r\\n\\r\\n    vec3 dirDiffuse  = vec3( 0.0 );\\r\\n    vec3 dirSpecular = vec3( 0.0 );\\r\\n\\r\\n    for( int i = 0; i < MAX_DIR_LIGHTS; i ++ ) {\\r\\n\\r\\n        vec4 lDirection = viewMatrix * vec4( directionalLightDirection[ i ], 0.0 );\\r\\n        vec3 dirVector = normalize( lDirection.xyz );\\r\\n\\r\\n\\r\\n\\r\\n        float dotProduct = dot( normal, dirVector );\\r\\n\\r\\n        float dirDiffuseWeight = max( dotProduct, 0.0 );\\r\\n\\r\\n        dirDiffuse  += InputToLinear(diffuse) * InputToLinear(directionalLightColor[ i ]) * dirDiffuseWeight;\\r\\n\\r\\n\\r\\n\\r\\n        vec3 dirHalfVector = normalize( dirVector + viewDirection );\\r\\n        float dirDotNormalHalf = max( dot( normal, dirHalfVector ), 0.0 );\\r\\n        float dirSpecularWeight = specularStrength * max( pow( dirDotNormalHalf, shininessB ), 0.0 );\\r\\n\\r\\n        float specularNormalization = shininessB * 0.125 + 0.25;\\r\\n        vec3 schlick = Schlick_v3(InputToLinear(specular), dot( dirVector, dirHalfVector ));\\r\\n\\r\\n        dirSpecular += schlick * InputToLinear(directionalLightColor[ i ]) * dirSpecularWeight * dirDiffuseWeight * specularNormalization;\\r\\n\\r\\n    }\\r\\n\\r\\n    totalDiffuse += dirDiffuse;\\r\\n    totalSpecular += dirSpecular;\\r\\n\\r\\n#endif\\r\\n\\r\\n\\r\\n\\r\\n#ifdef USE_IRRADIANCEMAP\\r\\n    vec3 worldNormal = mat3(viewMatrixInverse) * normal;\\r\\n    vec3 indirectDiffuse = sampleIrradianceMap(worldNormal, irradianceMap, envMapExposure);\\r\\n\\r\\n    indirectDiffuse = applyEnvShadow(indirectDiffuse, worldNormal);\\r\\n\\r\\n    totalDiffuse += InputToLinear(diffuse) * indirectDiffuse;\\r\\n#endif\\r\\n\\r\\n\\r\\n#ifdef METAL\\r\\n    gl_FragColor.xyz = gl_FragColor.xyz * ( InputToLinear(emissive) + totalDiffuse + ambientLightColor * InputToLinear(diffuse) + totalSpecular );\\r\\n#else\\r\\n    gl_FragColor.xyz = gl_FragColor.xyz * ( InputToLinear(emissive) + totalDiffuse + ambientLightColor * InputToLinear(diffuse) ) + totalSpecular;\\r\\n#endif\\r\\n\\r\\n\\r\\n\\r\\n#ifdef USE_COLOR\\r\\n    gl_FragColor = gl_FragColor * vec4( vColor, 1.0 );\\r\\n#endif\\r\\n\\r\\n\\r\\n#if defined(USE_ENVMAP)\\r\\n\\r\\n    vec3 reflectVec;\\r\\n\\r\\n#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP )\\r\\n\\r\\n#ifdef ENVMAP_MODE_REFLECTION\\r\\n    reflectVec = reflect( -viewDirection, normal );\\r\\n#else \\r\\n    reflectVec = refract( -viewDirection, normal, refractionRatio );\\r\\n#endif\\r\\n\\r\\n#else\\r\\n\\r\\n    reflectVec = reflect( -viewDirection, normal );\\r\\n\\r\\n#endif\\r\\n\\r\\n    reflectVec = mat3(viewMatrixInverse) * reflectVec;\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    float reflectScale = 1.0;\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    vec3 cubeColor = sampleReflection(reflectVec, reflMipIndex);\\r\\n\\r\\n    cubeColor *= reflectScale;\\r\\n\\r\\n    float facing = dot( viewDirection, normal );\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    if (facing < -1e-2)\\r\\n        facing = 1.0;\\r\\n    else\\r\\n        facing = max(1e-6, facing);\\r\\n\\r\\n#ifdef USE_BUMPMAP\\r\\n\\r\\n\\r\\n\\r\\n    facing = min(1.0, facing + bumpScale * 7.0);\\r\\n\\r\\n#endif\\r\\n\\r\\n    vec3 schlickRefl;\\r\\n\\r\\n#ifdef METAL\\r\\n\\r\\n\\r\\n    schlickRefl = InputToLinear(specular);\\r\\n\\r\\n#else\\r\\n\\r\\n\\r\\n    schlickRefl = Schlick_v3(InputToLinear(specular), facing);\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    gl_FragColor.a = mix(gl_FragColor.a, Schlick_f(gl_FragColor.a, facing), reflectivity);\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n    float invSchlick = pow(1.0 - facing * 0.5, 5.0);\\r\\n\\r\\n\\r\\n    float norm_factor = (28.0 / 23.0) * (1.0 - invSchlick) * (1.0 - invSchlick);\\r\\n\\r\\n    gl_FragColor.xyz *= norm_factor * (1.0 - InputToLinear(specular));\\r\\n\\r\\n#endif\\r\\n\\r\\n\\r\\n    gl_FragColor.xyz += cubeColor.xyz * specularStrength * schlickRefl.xyz;\\r\\n\\r\\n#ifdef CLEARCOAT\\r\\n\\r\\n    vec3 reflectVecClearcoat = reflect( -viewDirection, geomNormal );\\r\\n    reflectVecClearcoat = mat3(viewMatrixInverse) * reflectVecClearcoat;\\r\\n\\r\\n    vec3 cubeColorClearcoat = sampleReflection(reflectVecClearcoat, 0.0);\\r\\n\\r\\n\\r\\n    float schlickClearcoat = Schlick_f(InputToLinear(reflectivity), facing);\\r\\n\\r\\n\\r\\n\\r\\n    gl_FragColor.xyz = mix(gl_FragColor.xyz, cubeColorClearcoat * schlickClearcoat, 0.5);\\r\\n\\r\\n#endif\\r\\n\\r\\n\\r\\n\\r\\n\\r\\n#endif\\r\\n\\r\\n#if TONEMAP_OUTPUT == 1\\r\\n    gl_FragColor.xyz = toneMapCanonOGS_WithGamma_WithColorPerserving(exposureBias * gl_FragColor.xyz);\\r\\n#elif TONEMAP_OUTPUT == 2\\r\\n    gl_FragColor.xyz = toneMapCanonFilmic_WithGamma( exposureBias * gl_FragColor.xyz );\\r\\n#endif\\r\\n\\r\\n\\r\\n\\r\\n#ifdef USE_FOG\\r\\n    float depth = gl_FragCoord.z / gl_FragCoord.w;\\r\\n    float fogFactor = smoothstep( fogNear, fogFar, depth );\\r\\n    gl_FragColor = mix( gl_FragColor, vec4( fogColor, gl_FragColor.w ), fogFactor );\\r\\n#endif\\r\\n#include<theming_frag>\\r\\n#include<final_frag>\\r\\n\\r\\n}\\r\\n\";","module.exports = \"varying vec3 vViewPosition;\\n#ifndef FLAT_SHADED\\nvarying vec3 vNormal;\\n#endif\\n#if defined( USE_MAP ) || defined( USE_SPECULARMAP )\\nvarying vec2 vUv;\\nuniform mat3 texMatrix;\\n#endif\\n#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP )\\nvarying vec2 vUvBump;\\nuniform mat3 texMatrixBump;\\n#endif\\n#if defined( USE_ALPHAMAP )\\nvarying vec2 vUvAlpha;\\nuniform mat3 texMatrixAlpha;\\n#endif\\n#if defined( USE_ENVMAP )\\n#if ! defined( USE_BUMPMAP ) && ! defined( USE_NORMALMAP )\\nuniform float refractionRatio;\\n#endif\\n#endif\\n#if MAX_SPOT_LIGHTS > 0 || NUM_CUTPLANES > 0\\nvarying vec3 vWorldPosition;\\n#endif\\n#ifdef USE_COLOR\\nvarying vec3 vColor;\\n#endif\\n#ifdef MRT_NORMALS\\nvarying float depth;\\n#endif\\n#include<pack_normals>\\n#include<instancing_decl_vert>\\n#include<id_decl_vert>\\n#include<wide_lines_decl>\\n#include<shadowmap_decl_vert>\\nvoid main() {\\n#if defined( USE_MAP ) || defined( USE_SPECULARMAP )\\n    vUv = (texMatrix * vec3(uv, 1.0)).xy;\\n#endif\\n#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP )\\n    vUvBump = (texMatrixBump * vec3(uv, 1.0)).xy;\\n#endif\\n#if defined( USE_ALPHAMAP )\\n    vUvAlpha = (texMatrixAlpha * vec3(uv, 1.0)).xy;\\n#endif\\n#ifdef USE_COLOR\\n#ifdef GAMMA_INPUT\\n    vColor = color * color;\\n#else\\n    vColor = color;\\n#endif\\n#endif\\n#ifdef UNPACK_NORMALS\\n    vec3 objectNormal = decodeNormal(normal);\\n#else\\n    vec3 objectNormal = normal;\\n#endif\\n#ifdef FLIP_SIDED\\n    objectNormal = -objectNormal;\\n#endif\\n    objectNormal = getInstanceNormal(objectNormal);\\n    vec3 instPos = getInstancePos(position);\\n    vec3 transformedNormal = normalMatrix * objectNormal;\\n#ifndef FLAT_SHADED\\n    vNormal = normalize( transformedNormal );\\n#endif\\n    vec4 mvPosition = modelViewMatrix * vec4( instPos, 1.0 );\\n    gl_Position = projectionMatrix * mvPosition;\\n#include<wide_lines_vert>\\n    vViewPosition = -mvPosition.xyz;\\n#if MAX_SPOT_LIGHTS > 0 || NUM_CUTPLANES > 0\\n    vec4 worldPosition = modelMatrix * vec4( instPos, 1.0 );\\n    vWorldPosition = worldPosition.xyz;\\n#endif\\n#ifdef MRT_NORMALS\\n    depth = mvPosition.z;\\n#endif\\n#include<shadowmap_vert>\\n#include<id_vert>\\n}\\n\";","module.exports = \"\\n#define EDGE_SHARPNESS     (3.0)\\n#define SCALE               (2)\\n#define R                   (4)\\n#define VALUE_TYPE        float\\n#define VALUE_COMPONENTS   r\\n#define VALUE_IS_KEY       0\\n#define KEY_COMPONENTS     gb\\n#if __VERSION__ >= 330\\nconst float gaussian[R + 1] =\\nfloat[](0.153170, 0.144893, 0.122649, 0.092902, 0.062970);\\n#endif\\nuniform sampler2D   tDiffuse;\\nuniform vec2 size;\\nuniform vec2 resolution;\\nuniform vec2       axis;\\nuniform float radius;\\n#define  result         gl_FragColor.VALUE_COMPONENTS\\n#define  keyPassThrough gl_FragColor.KEY_COMPONENTS\\nfloat unpackKey(vec2 p) {\\n    return p.x + p.y * (1.0 / 255.0);\\n}\\nvarying vec2 vUv;\\nvoid main() {\\n#   if __VERSION__ < 330\\n    float gaussian[R + 1];\\n#       if R == 3\\n    gaussian[0] = 0.153170; gaussian[1] = 0.144893; gaussian[2] = 0.122649; gaussian[3] = 0.092902;\\n#       elif R == 4\\n    gaussian[0] = 0.153170; gaussian[1] = 0.144893; gaussian[2] = 0.122649; gaussian[3] = 0.092902; gaussian[4] = 0.062970;\\n#       elif R == 6\\n    gaussian[0] = 0.111220; gaussian[1] = 0.107798; gaussian[2] = 0.098151; gaussian[3] = 0.083953; gaussian[4] = 0.067458; gaussian[5] = 0.050920; gaussian[6] = 0.036108;\\n#       endif\\n#   endif\\n    ivec2 axisi = ivec2(axis);\\n    ivec2 ssC = ivec2(gl_FragCoord.xy);\\n    vec4 temp = texture2D(tDiffuse, vUv);\\n    gl_FragColor.gb = temp.KEY_COMPONENTS;\\n    gl_FragColor.a = temp.a;\\n    VALUE_TYPE sum = temp.VALUE_COMPONENTS;\\n    if (temp.a == 0.0) {\\n        result = sum;\\n        return;\\n    }\\n    float key = unpackKey(keyPassThrough);\\n    float BASE = gaussian[0];\\n    float totalWeight = BASE;\\n    sum *= totalWeight;\\n    float scale = 1.5 / radius;\\n    int r = -4; {\\n        vec2 ssUV = vec2(ssC + axisi * (r * SCALE))*resolution;\\n        temp = texture2D(tDiffuse, ssUV);\\n        float      tapKey = unpackKey(temp.KEY_COMPONENTS);\\n        VALUE_TYPE value  = temp.VALUE_COMPONENTS;\\n        float weight = 0.3 + gaussian[4];\\n        float dz = tapKey - key;\\n        weight *= max(0.0, 1.0 - (EDGE_SHARPNESS * 2000.0) * abs(dz) * scale);\\n        sum += value * weight;\\n        totalWeight += weight;\\n    }\\n    r = -3; {\\n        vec2 ssUV = vec2(ssC + axisi * (r * SCALE))*resolution;\\n        temp = texture2D(tDiffuse, ssUV);\\n        float      tapKey = unpackKey(temp.KEY_COMPONENTS);\\n        VALUE_TYPE value  = temp.VALUE_COMPONENTS;\\n        float weight = 0.3 + gaussian[3];\\n        float dz = tapKey - key;\\n        weight *= max(0.0, 1.0 - (EDGE_SHARPNESS * 2000.0) * abs(dz) * scale);\\n        sum += value * weight;\\n        totalWeight += weight;\\n    }\\n    r = -2; {\\n        vec2 ssUV = vec2(ssC + axisi * (r * SCALE))*resolution;\\n        temp = texture2D(tDiffuse, ssUV);\\n        float      tapKey = unpackKey(temp.KEY_COMPONENTS);\\n        VALUE_TYPE value  = temp.VALUE_COMPONENTS;\\n        float weight = 0.3 + gaussian[2];\\n        float dz = tapKey - key;\\n        weight *= max(0.0, 1.0 - (EDGE_SHARPNESS * 2000.0) * abs(dz) * scale);\\n        sum += value * weight;\\n        totalWeight += weight;\\n    }\\n    r=-1; {\\n        vec2 ssUV = vec2(ssC + axisi * (r * SCALE))*resolution;\\n        temp = texture2D(tDiffuse, ssUV);\\n        float      tapKey = unpackKey(temp.KEY_COMPONENTS);\\n        VALUE_TYPE value  = temp.VALUE_COMPONENTS;\\n        float weight = 0.3 + gaussian[1];\\n        float dz = tapKey - key;\\n        weight *= max(0.0, 1.0 - (EDGE_SHARPNESS * 2000.0) * abs(dz) * scale);\\n        sum += value * weight;\\n        totalWeight += weight;\\n    }\\n    r = 1; {\\n        vec2 ssUV = vec2(ssC + axisi * (r * SCALE))*resolution;\\n        temp = texture2D(tDiffuse, ssUV);\\n        float      tapKey = unpackKey(temp.KEY_COMPONENTS);\\n        VALUE_TYPE value  = temp.VALUE_COMPONENTS;\\n        float weight = 0.3 + gaussian[1];\\n        float dz = tapKey - key;\\n        weight *= max(0.0, 1.0 - (EDGE_SHARPNESS * 2000.0) * abs(dz) * scale);\\n        sum += value * weight;\\n        totalWeight += weight;\\n    }\\n    r = 2; {\\n        vec2 ssUV = vec2(ssC + axisi * (r * SCALE))*resolution;\\n        temp = texture2D(tDiffuse, ssUV);\\n        float      tapKey = unpackKey(temp.KEY_COMPONENTS);\\n        VALUE_TYPE value  = temp.VALUE_COMPONENTS;\\n        float weight = 0.3 + gaussian[2];\\n        float dz = tapKey - key;\\n        weight *= max(0.0, 1.0 - (EDGE_SHARPNESS * 2000.0) * abs(dz) * scale);\\n        sum += value * weight;\\n        totalWeight += weight;\\n    }\\n    r = 3; {\\n        vec2 ssUV = vec2(ssC + axisi * (r * SCALE))*resolution;\\n        temp = texture2D(tDiffuse, ssUV);\\n        float      tapKey = unpackKey(temp.KEY_COMPONENTS);\\n        VALUE_TYPE value  = temp.VALUE_COMPONENTS;\\n        float weight = 0.3 + gaussian[3];\\n        float dz = tapKey - key;\\n        weight *= max(0.0, 1.0 - (EDGE_SHARPNESS * 2000.0) * abs(dz) * scale);\\n        sum += value * weight;\\n        totalWeight += weight;\\n    }\\n    r = 4; {\\n        vec2 ssUV = vec2(ssC + axisi * (r * SCALE))*resolution;\\n        temp = texture2D(tDiffuse, ssUV);\\n        float      tapKey = unpackKey(temp.KEY_COMPONENTS);\\n        VALUE_TYPE value  = temp.VALUE_COMPONENTS;\\n        float weight = 0.3 + gaussian[4];\\n        float dz = tapKey - key;\\n        weight *= max(0.0, 1.0 - (EDGE_SHARPNESS * 2000.0) * abs(dz) * scale);\\n        sum += value * weight;\\n        totalWeight += weight;\\n    }\\n    const float epsilon = 0.0001;\\n    result = sum / (totalWeight + epsilon);\\n}\\n\";","module.exports = \"\\n#include <depth_texture>\\n#define USE_MIPMAP 1\\nuniform float cameraNear;\\nuniform float cameraFar;\\nuniform vec2 size;\\nuniform vec2 resolution;\\nuniform float lumInfluence;\\nvarying vec2 vUv;\\n#define NUM_SAMPLES (17)\\n#define LOG_MAX_OFFSET (3)\\n#define MAX_MIP_LEVEL (5)\\n#define NUM_SPIRAL_TURNS (5)\\n#define MIN_RADIUS (3.0)\\nuniform float           projScale;\\n#ifdef USE_MIPMAP\\nuniform sampler2D tDepth_mip1;\\nuniform sampler2D tDepth_mip2;\\nuniform sampler2D tDepth_mip3;\\nuniform sampler2D tDepth_mip4;\\nuniform sampler2D tDepth_mip5;\\n#endif\\nuniform float radius;\\nuniform float bias;\\nuniform float intensity;\\nvec2 tapLocation(int sampleNumber, float spinAngle, out float ssR){\\n    float alpha = float(float(sampleNumber) + 0.5) * (1.0 / float(NUM_SAMPLES));\\n    float angle = alpha * (float(NUM_SPIRAL_TURNS) * 6.28) + spinAngle;\\n    ssR = alpha;\\n    return vec2(cos(angle), sin(angle));\\n}\\nfloat CSZToKey(float z) {\\n    return clamp( (z+cameraNear) / (cameraNear-cameraFar), 0.0, 1.0);\\n}\\nvoid packKey(float key, out vec2 p) {\\n    float temp = floor(key * 255.0);\\n    p.x = temp * (1.0 / 255.0);\\n    p.y = key * 255.0 - temp;\\n}\\n#include <pack_depth>\\nfloat unpackDepthNearFar( const in vec4 rgba_depth ) {\\n    float depth = unpackDepth( rgba_depth );\\n    if (depth == 0.0)\\n        return -cameraFar * 1.0e10;\\n    return depth * (cameraNear - cameraFar) - cameraNear;\\n}\\nvec3 reconstructCSFaceNormal(vec3 C) {\\n    return normalize(cross(dFdy(C), dFdx(C)));\\n}\\nvec3 reconstructNonUnitCSFaceNormal(vec3 C) {\\n    return cross(dFdy(C), dFdx(C));\\n}\\nvec3 getPosition(ivec2 ssP, float depth) {\\n    vec3 P;\\n    P = reconstructCSPosition(vec2(ssP) + vec2(0.5), depth);\\n    return P;\\n}\\nvec3 getOffsetPosition(ivec2 ssC, vec2 unitOffset, float ssR) {\\n    ivec2 ssP = ivec2(ssR * unitOffset) + ssC;\\n    vec3 P;\\n    vec2 screenUV = (vec2(ssP) + vec2(0.5)) * resolution;\\n#ifdef USE_MIPMAP\\n    int mipLevel = int(max(0.0, min(floor(log2(ssR)) - float(LOG_MAX_OFFSET), float(MAX_MIP_LEVEL))));\\n    if (mipLevel == 0) {\\n        P.z = texture2D(tDepth, screenUV).z;\\n        if (P.z == 0.0) P.z = -cameraFar * 1.0e10;\\n    }\\n    else if (mipLevel == 1)\\n        P.z = unpackDepthNearFar(texture2D(tDepth_mip1, screenUV));\\n    else if (mipLevel == 2)\\n        P.z = unpackDepthNearFar(texture2D(tDepth_mip2, screenUV));\\n    else if (mipLevel == 3)\\n        P.z = unpackDepthNearFar(texture2D(tDepth_mip3, screenUV));\\n    else if (mipLevel == 4)\\n        P.z = unpackDepthNearFar(texture2D(tDepth_mip4, screenUV));\\n    else if (mipLevel == 5)\\n        P.z = unpackDepthNearFar(texture2D(tDepth_mip5, screenUV));\\n#else\\n    P.z = texture2D(tDepth, screenUV).z;\\n    if (P.z == 0.0) P.z = -cameraFar * 1.0e10;\\n#endif\\n    P = reconstructCSPosition(vec2(ssP) + vec2(0.5), P.z);\\n    return P;\\n}\\nfloat sampleAO(in ivec2 ssC, in vec3 C, in vec3 n_C, in float ssDiskRadius, in int tapIndex, in float randomPatternRotationAngle) {\\n    float ssR;\\n    vec2 unitOffset = tapLocation(tapIndex, randomPatternRotationAngle, ssR);\\n    ssR = max(0.75, ssR * ssDiskRadius);\\n    vec3 Q = getOffsetPosition(ssC, unitOffset, ssR);\\n    vec3 v = Q - C;\\n    float vv = dot(v, v);\\n    float vn = dot(v, n_C);\\n    const float epsilon = 0.001;\\n    float angAdjust = mix(1.0, max(0.0, 1.5 * n_C.z), 0.35);\\n#define HIGH_QUALITY\\n#ifdef HIGH_QUALITY\\n    float f = max(1.0 - vv / (radius * radius), 0.0); return angAdjust * f * max((vn - bias) / sqrt(epsilon + vv), 0.0);\\n#else\\n    float f = max(radius * radius - vv, 0.0); return angAdjust * f * f * f * max((vn - bias) / (epsilon + vv), 0.0);\\n#endif\\n}\\nconst bool useNoise = true;\\nfloat getRandomAngle(vec2 pos) {\\n    float dt= dot(pos ,vec2(12.9898,78.233));\\n    return 6.28318 * fract(sin(mod(dt,3.14)) * 43758.5453);\\n}\\nvoid main() {\\n    ivec2 ssC = ivec2(gl_FragCoord.xy);\\n    vec4 nrmz = texture2D(tDepth, vUv);\\n    if (nrmz.z == 0.0) {\\n        gl_FragColor.r = 1.0;\\n        gl_FragColor.a = 0.0;\\n        packKey(1.0, gl_FragColor.gb);\\n        return;\\n    }\\n    vec3 C = getPosition(ssC, nrmz.z);\\n    packKey(CSZToKey(C.z), gl_FragColor.gb);\\n    float ssDiskRadius = -projScale * radius / mix(C.z, -1.0, isOrtho);\\n    float A;\\n    if (ssDiskRadius <= MIN_RADIUS) {\\n        A = 1.0;\\n    } else {\\n        float sum = 0.0;\\n        float randomPatternRotationAngle = getRandomAngle(vUv);\\n        vec3 n_C = vec3(nrmz.x, nrmz.y, sqrt(1.0 - dot(nrmz.xy, nrmz.xy)));\\n        sum += sampleAO(ssC, C, n_C, ssDiskRadius, 0, randomPatternRotationAngle);\\n        sum += sampleAO(ssC, C, n_C, ssDiskRadius, 1, randomPatternRotationAngle);\\n        sum += sampleAO(ssC, C, n_C, ssDiskRadius, 2, randomPatternRotationAngle);\\n        sum += sampleAO(ssC, C, n_C, ssDiskRadius, 3, randomPatternRotationAngle);\\n        sum += sampleAO(ssC, C, n_C, ssDiskRadius, 4, randomPatternRotationAngle);\\n        sum += sampleAO(ssC, C, n_C, ssDiskRadius, 5, randomPatternRotationAngle);\\n        sum += sampleAO(ssC, C, n_C, ssDiskRadius, 6, randomPatternRotationAngle);\\n        sum += sampleAO(ssC, C, n_C, ssDiskRadius, 7, randomPatternRotationAngle);\\n        sum += sampleAO(ssC, C, n_C, ssDiskRadius, 8, randomPatternRotationAngle);\\n        sum += sampleAO(ssC, C, n_C, ssDiskRadius, 9, randomPatternRotationAngle);\\n        sum += sampleAO(ssC, C, n_C, ssDiskRadius, 10, randomPatternRotationAngle);\\n        sum += sampleAO(ssC, C, n_C, ssDiskRadius, 11, randomPatternRotationAngle);\\n        sum += sampleAO(ssC, C, n_C, ssDiskRadius, 12, randomPatternRotationAngle);\\n        sum += sampleAO(ssC, C, n_C, ssDiskRadius, 13, randomPatternRotationAngle);\\n        sum += sampleAO(ssC, C, n_C, ssDiskRadius, 14, randomPatternRotationAngle);\\n        sum += sampleAO(ssC, C, n_C, ssDiskRadius, 15, randomPatternRotationAngle);\\n        sum += sampleAO(ssC, C, n_C, ssDiskRadius, 16, randomPatternRotationAngle);\\n        float intensityDivR6 = intensity / pow(radius, 6.0);\\n#ifdef HIGH_QUALITY\\n        A = pow(max(0.0, 1.0 - sqrt(sum * (3.0 / float(NUM_SAMPLES)))), intensity);\\n#else\\n        A = max(0.0, 1.0 - sum * intensityDivR6 * (5.0 / float(NUM_SAMPLES)));\\n        A = (pow(A, 0.2) + 1.2 * A*A*A*A) / 2.2;\\n#endif\\n        if (abs(dFdx(C.z)) < 0.02) {\\n            A -= dFdx(A) * (mod(float(ssC.x), 2.0) - 0.5);\\n        }\\n        if (abs(dFdy(C.z)) < 0.02) {\\n            A -= dFdy(A) * (mod(float(ssC.y), 2.0) - 0.5);\\n        }\\n        A = mix(1.0, A, clamp(ssDiskRadius - MIN_RADIUS,0.0,1.0));\\n    }\\n    gl_FragColor.r = A;\\n    gl_FragColor.a = 1.0;\\n}\\n\";","module.exports = \"uniform sampler2D tDiffuse;\\nuniform vec2 resolution;\\nvoid main() {\\n    vec2 ssP = vec2(gl_FragCoord.xy);\\n    ssP = ssP * 2.0 + mod(ssP, 2.0);\\n    ssP = (ssP + 0.5) * resolution * 0.5;\\n    gl_FragColor = texture2D(tDiffuse, ssP);\\n}\\n\";","module.exports = \"uniform sampler2D tDiffuse;\\nuniform vec2 resolution;\\nuniform float cameraNear;\\nuniform float cameraInvNearFar;\\n#include <pack_depth>\\nvoid main() {\\n    vec2 ssP = vec2(gl_FragCoord.xy);\\n    ssP = ssP * 2.0 + mod(ssP, 2.0);\\n    ssP = (ssP + 0.5) * resolution * 0.5;\\n    float depth = texture2D(tDiffuse, ssP).z;\\n    if (depth != 0.0)\\n        depth = (depth + cameraNear) * cameraInvNearFar;\\n    gl_FragColor = packDepth(depth);\\n}\\n\";","module.exports = \"varying vec2 vUv;\\nvoid main() {\\n    vUv = uv;\\n    gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\\n}\\n\";","module.exports = \"\\nvoid main() {\\n    gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\\n}\\n\";","module.exports = \"#include<shadowmap_decl_common>\\nvarying float depth;\\n#ifdef USE_SURFACE_CUTOUT_MAP\\n#include<float3_average>\\n#prism_uniforms<surface_cutout_map>\\nvarying vec2 vUv;\\n#else\\n#ifdef USE_MAP\\nvarying vec2 vUv;\\nuniform sampler2D map;\\n#endif\\n#ifdef USE_ALPHAMAP\\nvarying vec2 vUvAlpha;\\nuniform sampler2D alphaMap;\\n#endif\\n#endif\\nuniform float shadowMinOpacity;\\nvoid applyCutoutMaps() {\\n    float opacity = 1.0;\\n#ifdef USE_SURFACE_CUTOUT_MAP\\n#prism_sample_texture<surface_cutout, opacity, true, false>\\n#else\\n#ifdef USE_MAP\\n    opacity *= GET_MAP(vUv).a;\\n#endif\\n#ifdef USE_ALPHAMAP\\n    opacity *= GET_ALPHAMAP(vUvAlpha).r;\\n#endif\\n#endif\\n#if defined(USE_SURFACE_CUTOUT_MAP) || defined(USE_MAP) || defined(USE_ALPHAMAP)\\n    if (opacity < shadowMinOpacity) discard;\\n#endif\\n}\\nvoid main() {\\n    float normalizedLinearDepth = (depth - shadowMapRangeMin) / shadowMapRangeSize;\\n    float val = exp(shadowESMConstant * normalizedLinearDepth);\\n#ifdef USE_HARD_SHADOWS\\n    val = normalizedLinearDepth;\\n#endif\\n    applyCutoutMaps();\\n    gl_FragColor = vec4(val, 0, 0, 1);\\n}\\n\";","module.exports = \"#include<shadowmap_decl_frag>\\nvoid main() {\\n    float shadowIntensity = 0.5 * (1.0 - getShadowValue());\\n    gl_FragColor = vec4(0.0, 0.0, 0.0, shadowIntensity);\\n}\\n\";","module.exports = \"#include<shadowmap_decl_vert>\\nvoid main() {\\n    gl_Position = projectionMatrix * modelViewMatrix * vec4(position, 1.0);\\n#include<shadowmap_vert>\\n}\\n\";","module.exports = \"#include<shadowmap_decl_common>\\nvarying float depth;\\n#ifdef USE_SURFACE_CUTOUT_MAP\\nvarying vec2 vUv;\\n#else\\n#ifdef USE_MAP\\nvarying vec2 vUv;\\nuniform mat3 texMatrix;\\n#endif\\n#ifdef USE_ALPHAMAP\\nvarying vec2 vUvAlpha;\\nuniform mat3 texMatrixAlpha;\\n#endif\\n#endif\\nvoid passCutoutUVCoords() {\\n#ifdef USE_SURFACE_CUTOUT_MAP\\n    vUv = uv;\\n#else\\n#ifdef USE_MAP\\n    vUv = (texMatrix * vec3(uv, 1.0)).xy;\\n#endif\\n#ifdef USE_ALPHAMAP\\n    vUvAlpha = (texMatrixAlpha * vec3(uv, 1.0)).xy;\\n#endif\\n#endif\\n}\\nvoid main() {\\n    vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );\\n    vec4 p_Position = projectionMatrix * mvPosition;\\n    gl_Position = p_Position;\\n    depth = -mvPosition.z;\\n    passCutoutUVCoords();\\n}\\n\";","module.exports = \"#include<id_decl_frag>\\nuniform sampler2D sheetMap;\\nuniform sampler2D idMap;\\nuniform vec2 resolution;\\nuniform vec3 modelIDv2;\\nuniform float alphaTest;\\nvoid main() {\\n    vec2 uv = vec2(gl_FragCoord.x * resolution.x, gl_FragCoord.y * resolution.y);\\n    vec4 c = texture2D(sheetMap, uv);\\n    if (c.a <= alphaTest)\\n        discard;\\n    \\n    gl_FragColor = c;\\n    vec4 dbId = texture2D(idMap, uv);\\n#ifdef MRT_NORMALS\\n    outNormal = vec4(0.0, 0.0, 0.0, 1.0);\\n#endif\\n#ifdef MRT_ID_BUFFER\\n    outId = vec4(dbId.rgb, 1.0);\\n    #ifdef MODEL_COLOR\\n    outModelId = vec4(modelIDv2.rgb, 1.0);\\n    #endif\\n#elif defined(ID_COLOR)\\n    gl_FragColor = vec4(dbId.rgb, 1.0);\\n#elif defined(MODEL_COLOR)\\n    gl_FragColor = vec4(modelIDv2.rgb, 1.0);\\n#endif\\n}\\n\";","module.exports = \"void main() {\\n    gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\\n}\";","/**\n * BVH definitions:\n *\n * BVH Node: if this was C (the only real programming language), it would go something like this,\n * but with better alignment.\n *\n * This is definition for \"fat\" nodes (for rasterization),\n * i.e. when inner nodes also contain primitives.\n * struct Node {                                                            byte/short/int offset\n *      float worldBox[6]; //world box of the node node                         0/0/0\n *      int leftChildIndex; //pointer to left child node (right is left+1)     24/12/6\n *      ushort primCount; //how many fragments are at this node                28/14/7\n *      ushort flags; //bitfield of good stuff                                 30/15/7.5\n *\n *      int primStart; //start of node's own primitives (fragments) list       32/16/8\n * };\n * => sizeof(Node) = 36 bytes\n\n * Definition for lean nodes (for ray casting): when a node is either inner node (just children, no primitives)\n * or leaf (just primitives, no children).\n * struct Node {\n *      float worldBox[6]; //world box of the node\n *      union {\n *          int leftChildIndex; //pointer to left child node (right is left+1)\n *          int primStart; //start of node's own primitives (fragments) list\n *      };\n *      ushort primCount; //how many fragments are at this node\n *      ushort flags; //bitfield of good stuff\n * };\n * => sizeof(Node) = 32 bytes\n *\n * The class below encapsulates an array of such nodes using ArrayBuffer as backing store.\n *\n * @param {ArrayBuffer|number} initialData  Initial content of the NodeArray, or initial allocation of empty nodes\n * @param {boolean} useLeanNode Use minimal node structure size. Currently this parameter must be set to false.\n * @constructor\n */\nexport function NodeArray(initialData, useLeanNode) {\n  'use strict';\n\n  if (useLeanNode) {\n    this.bytes_per_node = 32;\n  } else {\n    this.bytes_per_node = 36;\n  }\n\n  var initialCount;\n  var initialBuffer;\n\n  if (initialData instanceof ArrayBuffer) {\n    initialCount = initialData.byteLength / this.bytes_per_node;\n    initialBuffer = initialData;\n    this.nodeCount = initialCount;\n  } else\n  {\n    initialCount = initialData | 0;\n    initialBuffer = new ArrayBuffer(this.bytes_per_node * initialCount);\n    this.nodeCount = 0;\n  }\n\n  this.nodeCapacity = initialCount;\n  this.nodesRaw = initialBuffer;\n\n  this.is_lean_node = useLeanNode;\n  this.node_stride = this.bytes_per_node / 4;\n  this.node_stride_short = this.bytes_per_node / 2;\n\n  //Allocate memory buffer for all tree nodes\n  this.nodesF = new Float32Array(this.nodesRaw);\n  this.nodesI = new Int32Array(this.nodesRaw);\n  this.nodesS = new Uint16Array(this.nodesRaw);\n}\n\nNodeArray.prototype.setLeftChild = function (nodeidx, childidx) {\n  this.nodesI[nodeidx * this.node_stride + 6] = childidx;\n};\nNodeArray.prototype.getLeftChild = function (nodeidx) {\n  return this.nodesI[nodeidx * this.node_stride + 6];\n};\n\nNodeArray.prototype.setPrimStart = function (nodeidx, start) {\n  if (this.is_lean_node)\n  this.nodesI[nodeidx * this.node_stride + 6] = start;else\n\n  this.nodesI[nodeidx * this.node_stride + 8] = start;\n};\nNodeArray.prototype.getPrimStart = function (nodeidx) {\n  if (this.is_lean_node)\n  return this.nodesI[nodeidx * this.node_stride + 6];else\n\n  return this.nodesI[nodeidx * this.node_stride + 8];\n};\n\nNodeArray.prototype.setPrimCount = function (nodeidx, count) {\n  this.nodesS[nodeidx * this.node_stride_short + 14] = count;\n};\nNodeArray.prototype.getPrimCount = function (nodeidx) {\n  return this.nodesS[nodeidx * this.node_stride_short + 14];\n};\n\nNodeArray.prototype.setFlags = function (nodeidx, axis, isFirst, isTransparent) {\n  this.nodesS[nodeidx * this.node_stride_short + 15] = isTransparent << 3 | isFirst << 2 | axis & 0x3;\n};\nNodeArray.prototype.getFlags = function (nodeidx) {\n  return this.nodesS[nodeidx * this.node_stride_short + 15];\n};\n\nNodeArray.prototype.setBox0 = function (nodeidx, src) {\n  var off = nodeidx * this.node_stride;\n  var dst = this.nodesF;\n  dst[off] = src[0];\n  dst[off + 1] = src[1];\n  dst[off + 2] = src[2];\n  dst[off + 3] = src[3];\n  dst[off + 4] = src[4];\n  dst[off + 5] = src[5];\n};\nNodeArray.prototype.getBoxThree = function (nodeidx, dst) {\n  var off = nodeidx * this.node_stride;\n  var src = this.nodesF;\n  dst.min.x = src[off];\n  dst.min.y = src[off + 1];\n  dst.min.z = src[off + 2];\n  dst.max.x = src[off + 3];\n  dst.max.y = src[off + 4];\n  dst.max.z = src[off + 5];\n};\nNodeArray.prototype.getBoxArray = function (nodeidx, dst, offset) {\n  var off = nodeidx * this.node_stride;\n  var src = this.nodesF;\n  offset = offset || 0;\n  dst[0 + offset] = src[off];\n  dst[1 + offset] = src[off + 1];\n  dst[2 + offset] = src[off + 2];\n  dst[3 + offset] = src[off + 3];\n  dst[4 + offset] = src[off + 4];\n  dst[5 + offset] = src[off + 5];\n};\nNodeArray.prototype.setBoxThree = function (nodeidx, src) {\n  var off = nodeidx * this.node_stride;\n  var dst = this.nodesF;\n  dst[off] = src.min.x;\n  dst[off + 1] = src.min.y;\n  dst[off + 2] = src.min.z;\n  dst[off + 3] = src.max.x;\n  dst[off + 4] = src.max.y;\n  dst[off + 5] = src.max.z;\n};\n\n\n\n\nNodeArray.prototype.makeEmpty = function (nodeidx) {\n\n  var off = nodeidx * this.node_stride;\n  var dst = this.nodesI;\n\n  //No point to makeEmpty here, because the box gets set\n  //directly when the node is initialized in bvh_subdivide.\n  //box_make_empty(this.nodesF, off);\n\n  //_this.setLeftChild(nodeidx,-1);\n  dst[off + 6] = -1;\n\n  //both prim count and flags to 0\n  dst[off + 7] = 0;\n\n  //_this.setPrimStart(nodeidx, -1);\n  if (!this.is_lean_node)\n  dst[off + 8] = -1;\n\n};\n\nNodeArray.prototype.realloc = function (extraSize) {\n  if (this.nodeCount + extraSize > this.nodeCapacity) {\n    var nsz = 0 | this.nodeCapacity * 3 / 2;\n    if (nsz < this.nodeCount + extraSize)\n    nsz = this.nodeCount + extraSize;\n\n    var nnodes = new ArrayBuffer(nsz * this.bytes_per_node);\n    var nnodesI = new Int32Array(nnodes);\n    nnodesI.set(this.nodesI);\n\n    this.nodeCapacity = nsz;\n    this.nodesRaw = nnodes;\n    this.nodesF = new Float32Array(nnodes);\n    this.nodesI = nnodesI;\n    this.nodesS = new Uint16Array(nnodes);\n  }\n};\n\nNodeArray.prototype.nextNodes = function (howMany) {\n\n  this.realloc(howMany);\n\n  var res = this.nodeCount;\n  this.nodeCount += howMany;\n\n  for (var i = 0; i < howMany; i++) {\n    this.makeEmpty(res + i);\n  }\n\n  return res;\n};\n\nNodeArray.prototype.getRawData = function () {\n  return this.nodesRaw.slice(0, this.nodeCount * this.bytes_per_node);\n};\n\nvar POINT_STRIDE = 3;\nvar BOX_EPSILON = 1e-5;\nvar BOX_SCALE_EPSILON = 1e-5;\nvar MAX_DEPTH = 15; /* max tree depth */\nvar MAX_BINS = 16;\n\n/**\n                   * Bounding Volume Hierarchy build algorithm.\n                   * Uses top down binning -- see \"On fast Construction of SAH-based Bounding Volume Hierarchies\" by I.Wald\n                   * Ported from the C version here: https://git.autodesk.com/stanevt/t-ray/blob/master/render3d/t-ray/t-core/t-bvh.c\n                   * Optimized for JavaScript.\n                   */\nvar BVHModule = function () {\n  //There be dragons in this closure.\n\n  \"use strict\";\n\n\n  /**\n                 * Utilities for manipulating bounding boxes stored\n                 * in external array (as sextuplets of float32)\n                 */\n\n\n  function box_get_centroid(dst, dst_off, src, src_off) {\n    dst[dst_off] = 0.5 * (src[src_off] + src[src_off + 3]);\n    dst[dst_off + 1] = 0.5 * (src[src_off + 1] + src[src_off + 4]);\n    dst[dst_off + 2] = 0.5 * (src[src_off + 2] + src[src_off + 5]);\n  }\n\n  function box_add_point_0(dst, src, src_off) {\n\n    if (dst[0] > src[src_off]) dst[0] = src[src_off];\n    if (dst[3] < src[src_off]) dst[3] = src[src_off];\n\n    if (dst[1] > src[src_off + 1]) dst[1] = src[src_off + 1];\n    if (dst[4] < src[src_off + 1]) dst[4] = src[src_off + 1];\n\n    if (dst[2] > src[src_off + 2]) dst[2] = src[src_off + 2];\n    if (dst[5] < src[src_off + 2]) dst[5] = src[src_off + 2];\n\n  }\n\n  function box_add_box_0(dst, src, src_off) {\n\n    if (dst[0] > src[src_off]) dst[0] = src[src_off];\n    if (dst[1] > src[src_off + 1]) dst[1] = src[src_off + 1];\n    if (dst[2] > src[src_off + 2]) dst[2] = src[src_off + 2];\n\n    if (dst[3] < src[src_off + 3]) dst[3] = src[src_off + 3];\n    if (dst[4] < src[src_off + 4]) dst[4] = src[src_off + 4];\n    if (dst[5] < src[src_off + 5]) dst[5] = src[src_off + 5];\n  }\n\n  function box_add_box_00(dst, src) {\n    if (dst[0] > src[0]) dst[0] = src[0];\n    if (dst[1] > src[1]) dst[1] = src[1];\n    if (dst[2] > src[2]) dst[2] = src[2];\n\n    if (dst[3] < src[3]) dst[3] = src[3];\n    if (dst[4] < src[4]) dst[4] = src[4];\n    if (dst[5] < src[5]) dst[5] = src[5];\n  }\n\n  function box_get_size(dst, dst_off, src, src_off) {\n    for (var i = 0; i < 3; i++) {\n      dst[dst_off + i] = src[src_off + 3 + i] - src[src_off + i];\n    }\n  }\n\n  //function box_copy(dst, dst_off, src, src_off) {\n  //    for (var i=0; i<6; i++) {\n  //        dst[dst_off+i] = src[src_off+i];\n  //    }\n  //}\n\n  // unwound version of box_copy\n  function box_copy_00(dst, src) {\n    dst[0] = src[0];\n    dst[1] = src[1];\n    dst[2] = src[2];\n    dst[3] = src[3];\n    dst[4] = src[4];\n    dst[5] = src[5];\n  }\n\n  var dbl_max = Infinity;\n\n  //function box_make_empty(dst, dst_off) {\n  //        dst[dst_off]   =  dbl_max;\n  //        dst[dst_off+1] =  dbl_max;\n  //        dst[dst_off+2] =  dbl_max;\n  //        dst[dst_off+3] = -dbl_max;\n  //        dst[dst_off+4] = -dbl_max;\n  //        dst[dst_off+5] = -dbl_max;\n  //}\n\n  function box_make_empty_0(dst) {\n    dst[0] = dbl_max;\n    dst[1] = dbl_max;\n    dst[2] = dbl_max;\n    dst[3] = -dbl_max;\n    dst[4] = -dbl_max;\n    dst[5] = -dbl_max;\n  }\n\n  function box_area(src, src_off) {\n\n    var dx = src[src_off + 3] - src[src_off];\n    var dy = src[src_off + 4] - src[src_off + 1];\n    var dz = src[src_off + 5] - src[src_off + 2];\n\n    if (dx < 0 || dy < 0 || dz < 0)\n    return 0;\n\n    return 2.0 * (dx * dy + dy * dz + dz * dx);\n  }\n\n  function box_area_0(src) {\n\n    var dx = src[3] - src[0];\n    var dy = src[4] - src[1];\n    var dz = src[5] - src[2];\n\n    if (dx < 0 || dy < 0 || dz < 0)\n    return 0;\n\n    return 2.0 * (dx * dy + dy * dz + dz * dx);\n  }\n\n\n\n\n\n  function bvh_split_info() {\n    this.vb_left = new Float32Array(6);\n    this.vb_right = new Float32Array(6);\n    this.cb_left = new Float32Array(6);\n    this.cb_right = new Float32Array(6);\n    this.num_left = 0;\n    this.best_split = -1;\n    this.best_cost = -1;\n    this.num_bins = -1;\n  }\n\n  bvh_split_info.prototype.reset = function () {\n    this.num_left = 0;\n    this.best_split = -1;\n    this.best_cost = -1;\n    this.num_bins = -1;\n  };\n\n\n  function bvh_bin() {\n    this.box_bbox = new Float32Array(6); // bbox of all primitive bboxes\n    this.box_centroid = new Float32Array(6); // bbox of all primitive centroids\n    this.num_prims = 0; // number of primitives in the bin\n  }\n\n  bvh_bin.prototype.reset = function () {\n    this.num_prims = 0; // number of primitives in the bin\n    box_make_empty_0(this.box_bbox);\n    box_make_empty_0(this.box_centroid);\n  };\n\n  function accum_bin_info() {\n    this.BL = new Float32Array(6);\n    this.CL = new Float32Array(6);\n    this.NL = 0;\n    this.AL = 0;\n  }\n\n  accum_bin_info.prototype.reset = function () {\n    this.NL = 0;\n    this.AL = 0;\n\n    box_make_empty_0(this.BL);\n    box_make_empty_0(this.CL);\n  };\n\n\n  //Scratch variables used by bvh_bin_axis\n  //TODO: can be replaced by a flat ArrayBuffer\n  var bins = [];\n  var i;\n  for (i = 0; i < MAX_BINS; i++) {\n    bins.push(new bvh_bin());\n  }\n\n  //TODO: can be replaced by a flat ArrayBuffer\n  var ai = [];\n  for (i = 0; i < MAX_BINS - 1; i++) {\n    ai.push(new accum_bin_info());}\n\n  var BR = new Float32Array(6);\n  var CR = new Float32Array(6);\n\n\n  function assign_bins(bvh, start, end, axis, cb, cbdiag, num_bins) {\n\n    var centroids = bvh.centroids;\n    var primitives = bvh.primitives;\n    var boxes = bvh.finfo.boxes;\n    var boxStride = bvh.finfo.boxStride;\n\n    /* bin assignment */\n    var k1 = num_bins * (1.0 - BOX_SCALE_EPSILON) / cbdiag[axis];\n    var cbaxis = cb[axis];\n    var sp = bvh.sort_prims;\n\n    for (var j = start; j <= end; j++)\n    {\n      /* map array index to primitive index -- since primitive index array gets reordered by the BVH build*/\n      /* while the primitive info array is not reordered */\n      var iprim = primitives[j] | 0;\n\n      var fpbin = k1 * (centroids[iprim * 3 /*POINT_STRIDE*/ + axis] - cbaxis);\n      var binid = fpbin | 0; //Truncate to int is algorithmic -> not an optimization thing!\n\n      /* possible floating point problems */\n      if (binid < 0)\n      {\n        binid = 0;\n        //debug(\"Bin index out of range \" + fpbin);\n      } else\n      if (binid >= num_bins)\n      {\n        binid = num_bins - 1;\n        //debug(\"Bin index out of range. \" + fpbin);\n      }\n\n      /* Store the bin index for the partitioning step, so we don't recompute it there */\n      sp[j] = binid;\n\n      /* update other bin data with the new primitive */\n      //var bin = bins[binid];\n      bins[binid].num_prims++;\n\n      box_add_box_0(bins[binid].box_bbox, boxes, iprim * boxStride);\n      box_add_point_0(bins[binid].box_centroid, centroids, iprim * 3 /*POINT_STRIDE*/);\n    }\n    /* at this point all primitves are assigned to a bin */\n  }\n\n\n  function bvh_bin_axis(bvh, start, end, axis, cb, cbdiag, split_info) {\n\n    /* if size is near 0 on this axis, cost of split is infinite */\n    if (cbdiag[axis] < bvh.scene_epsilon)\n    {\n      split_info.best_cost = Infinity;\n      return;\n    }\n\n    var num_bins = MAX_BINS;\n    if (num_bins > end - start + 1)\n    num_bins = end - start + 1;\n\n    var i;\n    for (i = 0; i < num_bins; i++) {\n      bins[i].reset();}\n\n    for (i = 0; i < num_bins - 1; i++) {\n      ai[i].reset();}\n\n    split_info.num_bins = num_bins;\n\n    assign_bins(bvh, start, end, axis, cb, cbdiag, num_bins);\n\n\n    /* now do the accumulation sweep from left to right */\n    box_copy_00(ai[0].BL, bins[0].box_bbox);\n    box_copy_00(ai[0].CL, bins[0].box_centroid);\n    ai[0].AL = box_area_0(ai[0].BL);\n    ai[0].NL = bins[0].num_prims;\n    var bin;\n    for (i = 1; i < num_bins - 1; i++)\n    {\n      bin = bins[i];\n      var aii = ai[i];\n      box_copy_00(aii.BL, ai[i - 1].BL);\n      box_add_box_00(aii.BL, bin.box_bbox);\n      aii.AL = box_area_0(aii.BL);\n\n      box_copy_00(aii.CL, ai[i - 1].CL);\n      box_add_box_00(aii.CL, bin.box_centroid);\n\n      aii.NL = ai[i - 1].NL + bin.num_prims;\n    }\n\n    /* sweep from right to left, keeping track of lowest cost and split */\n    i = num_bins - 1;\n    box_copy_00(BR, bins[i].box_bbox);\n    box_copy_00(CR, bins[i].box_centroid);\n    var AR = box_area_0(BR);\n    var NR = bins[i].num_prims;\n\n    var best_split = i;\n    var best_cost = AR * NR + ai[i - 1].AL * ai[i - 1].NL;\n    box_copy_00(split_info.vb_right, BR);\n    box_copy_00(split_info.cb_right, bins[i].box_centroid);\n    box_copy_00(split_info.vb_left, ai[i - 1].BL);\n    box_copy_00(split_info.cb_left, ai[i - 1].CL);\n    split_info.num_left = ai[i - 1].NL;\n\n    for (i = i - 1; i >= 1; i--)\n    {\n      bin = bins[i];\n      box_add_box_00(BR, bin.box_bbox);\n      box_add_box_00(CR, bin.box_centroid);\n      AR = box_area_0(BR);\n      NR += bin.num_prims;\n\n      var cur_cost = AR * NR + ai[i - 1].AL * ai[i - 1].NL;\n\n      if (cur_cost <= best_cost)\n      {\n        best_cost = cur_cost;\n        best_split = i;\n\n        box_copy_00(split_info.vb_right, BR);\n        box_copy_00(split_info.cb_right, CR);\n        box_copy_00(split_info.vb_left, ai[i - 1].BL);\n        box_copy_00(split_info.cb_left, ai[i - 1].CL);\n        split_info.num_left = ai[i - 1].NL;\n      }\n    }\n\n    split_info.best_split = best_split;\n    split_info.best_cost = best_cost;\n  }\n\n  function bvh_partition(bvh, start, end, axis, cb, cbdiag, split_info) {\n\n    //At this point, the original algorithm does an in-place NON-STABLE partition\n    //to move primitives to the left and right sides of the split plane\n    //into contiguous location of the primitives list for use by\n    //the child nodes. But, we want to preserve the ordering by size\n    //without having to do another sort, so we have to use\n    //a temporary storage location to copy into. We place right-side primitives\n    //in temporary storage, then copy back into the original storage in the right order.\n    //Left-side primitives are still put directly into the destination location.\n    var primitives = bvh.primitives;\n    //var centroids = bvh.centroids;\n    var i, j;\n\n    //sort_prims contains bin indices computed during the split step.\n    //Here we read those and also use sort_prims as temporary holding\n    //of primitive indices. Hopefully the read happens before the write. :)\n    //In C it was cheap enough to compute this again...\n    //var k1 = split_info.num_bins * (1.0 - BOX_SCALE_EPSILON) / cbdiag[axis];\n    //var cbaxis = cb[axis];\n    var sp = bvh.sort_prims;\n\n    var right = 0;\n    var left = start | 0;\n    var best_split = split_info.best_split | 0;\n\n    for (i = start; i <= end; i++) {\n      var iprim = primitives[i] | 0;\n      //var fpbin = (k1 * (centroids[3/*POINT_STRIDE*/ * iprim + axis] - cbaxis));\n      var binid = sp[i]; /* fpbin|0; */\n\n      if (binid < best_split) {\n        primitives[left++] = iprim;\n      } else {\n        sp[right++] = iprim;\n      }\n    }\n\n    //if ((left-start) != split_info.num_left)\n    //    debug(\"Mismatch between binning and partitioning.\");\n\n    //Copy back the right-side primitives into main primitives array, while\n    //maintaining order\n    for (j = 0; j < right; j++) {\n      primitives[left + j] = sp[j];\n    }\n    /* at this point the binning is complete and we have computed a split */\n  }\n\n\n  function bvh_fatten_inner_node(bvh, nodes, nodeidx, start, end, cb, cbdiag, poly_cut_off) {\n\n    var primitives = bvh.primitives;\n    var centroids = bvh.centroids;\n\n    //Take the first few items to place into the inner node,\n    //but do not go over the max item or polygon count.\n    var prim_count = end - start + 1;\n\n    if (prim_count > bvh.frags_per_inner_node)\n    prim_count = bvh.frags_per_inner_node;\n\n    if (prim_count > poly_cut_off)\n    prim_count = poly_cut_off;\n\n\n    nodes.setPrimStart(nodeidx, start);\n    nodes.setPrimCount(nodeidx, prim_count);\n    start += prim_count;\n\n    //Because we take some primitives off the input, we have to recompute\n    //the bounding box used for computing the node split.\n    box_make_empty_0(cb);\n    for (var i = start; i <= end; i++) {\n      box_add_point_0(cb, centroids, 3 /*POINT_STRIDE*/ * primitives[i]);\n    }\n\n    //Also update the split axis -- it could possibly change too.\n    box_get_size(cbdiag, 0, cb, 0);\n    //Decide which axis to split on. Done purely by longest.\n    var axis = 0;\n    if (cbdiag[1] > cbdiag[0])\n    axis = 1;\n    if (cbdiag[2] > cbdiag[axis])\n    axis = 2;\n\n    return axis;\n  }\n\n\n  var cbdiag = new Float32Array(3); //scratch variable used in bvh_subdivide\n\n  function bvh_subdivide(bvh,\n  nodeidx, /* current parent node to consider splitting */\n  start, end, /* primitive sub-range to be considered at this recursion step */\n  vb, /* bounding volume of the primitives' bounds in the sub-range */\n  cb, /* bounding box of primitive centroids in this range */\n  transparent, /* does the node contain opaque or transparent objects */\n  depth /* recursion depth */)\n\n  {\n    box_get_size(cbdiag, 0, cb, 0);\n    var nodes = bvh.nodes;\n    var frags_per_leaf = transparent ? bvh.frags_per_leaf_node_transparent : bvh.frags_per_leaf_node;\n    var frags_per_inner = transparent ? bvh.frags_per_inner_node_transparent : bvh.frags_per_inner_node;\n    var polys_per_node = bvh.max_polys_per_node;\n\n    //Decide which axis to split on.\n    var axis = 0;\n    if (cbdiag[1] > cbdiag[0])\n    axis = 1;\n    if (cbdiag[2] > cbdiag[axis])\n    axis = 2;\n\n    //Whether the node gets split or not, it gets\n    //the same overall bounding box.\n    nodes.setBox0(nodeidx, vb);\n\n    //Check the expected polygon count of the node. This figures out the maximum number of fragments\n    // we can put at the node as determined by polys_per_node\n    var poly_count = 0;\n    var poly_cut_off = 0;\n    var prim_count = end - start + 1;\n\n    // If we have the number of triangles in each mesh, limit the number of primitives in an inner node.\n    if (bvh.finfo.hasPolygonCounts && bvh.frags_per_inner_node) {\n      // Walk through primitives, add up the counts until we reach polys_per_node (10000), or run through\n      // frags_per_inner_node (usually 32).\n      // We know that later on we'll limit the number to frags_per_inner_node, so also do it here.\n      var shorten_end = prim_count <= bvh.frags_per_inner_node ? end : start + bvh.frags_per_inner_node - 1;\n      for (var i = start; i <= shorten_end; i++) {\n        poly_count += bvh.finfo.getPolygonCount(bvh.primitives[i]);\n        poly_cut_off++;\n        if (poly_count > polys_per_node)\n        break;\n      }\n    }\n\n    var isSmall = prim_count <= frags_per_leaf && poly_count < polys_per_node ||\n    prim_count === 1;\n\n    //Decide whether to terminate recursion\n    if (isSmall ||\n    depth > MAX_DEPTH || //max recursion depth\n    cbdiag[axis] < bvh.scene_epsilon) //node would be way too tiny for math to make sense (a point)\n      {\n        nodes.setLeftChild(nodeidx, -1);\n        nodes.setPrimStart(nodeidx, start);\n        nodes.setPrimCount(nodeidx, end - start + 1);\n        nodes.setFlags(nodeidx, 0, 0, transparent ? 1 : 0);\n        return;\n      }\n\n    //Pick the largest (first) primitives to live in this node\n    //NOTE: this assumes primitives are sorted by size.\n    //NOTE: This step is an optional departure from the original, and we also do a check for it above\n    // to compute poly_cut_off.\n    if (frags_per_inner) {\n      axis = bvh_fatten_inner_node(bvh, nodes, nodeidx, start, end, cb, cbdiag, poly_cut_off);\n      start = start + nodes.getPrimCount(nodeidx);\n    }\n\n    var split_info = new bvh_split_info();\n\n    //Do the binning of the remaining primitives to go into child nodes\n    bvh_bin_axis(bvh, start, end, axis, cb, cbdiag, split_info);\n\n    if (split_info.num_bins < 0) {\n      //Split was too costly, so add all objects to the current node and bail\n      nodes.setPrimCount(nodeidx, nodes.getPrimCount(nodeidx) + end - start + 1);\n      return;\n    }\n\n    bvh_partition(bvh, start, end, axis, cb, cbdiag, split_info);\n\n    var child_idx = nodes.nextNodes(2);\n\n    /* set info about split into the node */\n    var cleft = (split_info.vb_left[3 + axis] + split_info.vb_left[axis]) * 0.5;\n    var cright = (split_info.vb_right[3 + axis] + split_info.vb_right[axis]) * 0.5;\n\n    nodes.setFlags(nodeidx, axis, cleft < cright ? 0 : 1, transparent ? 1 : 0);\n    nodes.setLeftChild(nodeidx, child_idx);\n\n\n    /* validate split */\n    /*\n                         if (true) {\n                             for (var i=start; i< start+num_left; i++)\n                             {\n                                 //int binid = (int)(k1 * (info->prim_info[info->bvh->iprims[i]].centroid.v[axis] - cb->min.v[axis]));\n                                 var cen = primitives[i] * POINT_STRIDE;\n                                 if (   centroids[cen] < split_info.cb_left[0]\n                                     || centroids[cen] > split_info.cb_left[3]\n                                     || centroids[cen+1] < split_info.cb_left[1]\n                                     || centroids[cen+1] > split_info.cb_left[4]\n                                     || centroids[cen+2] < split_info.cb_left[2]\n                                     || centroids[cen+2] > split_info.cb_left[5])\n                                 {\n                                     debug (\"wrong centroid box\");\n                                 }\n                             }\n                              for (i=start+num_left; i<=end; i++)\n                             {\n                                 //int binid = (int)(k1 * (info->prim_info[info->bvh->iprims[i]].centroid.v[axis] - cb->min.v[axis]));\n                                 var cen = primitives[i] * POINT_STRIDE;\n                                 if (   centroids[cen] < split_info.cb_right[0]\n                                     || centroids[cen] > split_info.cb_right[3]\n                                     || centroids[cen+1] < split_info.cb_right[1]\n                                     || centroids[cen+1] > split_info.cb_right[4]\n                                     || centroids[cen+2] < split_info.cb_right[2]\n                                     || centroids[cen+2] > split_info.cb_right[5])\n                                 {\n                                     debug (\"wrong centroid box\");\n                                 }\n                             }\n                         }\n                         */\n\n\n    /* recurse */\n    //bvh_subdivide(bvh, child_idx, start, start + split_info.num_left - 1, split_info.vb_left, split_info.cb_left, transparent, depth+1);\n    //bvh_subdivide(bvh, child_idx + 1, start + split_info.num_left, end, split_info.vb_right, split_info.cb_right, transparent, depth+1);\n\n    //Iterative stack-based recursion for easier profiling\n    bvh.recursion_stack.push([bvh, child_idx + 1, start + split_info.num_left, end, split_info.vb_right, split_info.cb_right, transparent, depth + 1]);\n    bvh.recursion_stack.push([bvh, child_idx, start, start + split_info.num_left - 1, split_info.vb_left, split_info.cb_left, transparent, depth + 1]);\n\n  }\n\n\n  function compute_boxes(bvh) {\n\n    var boxv_o = bvh.boxv_o;\n    var boxc_o = bvh.boxc_o;\n    var boxv_t = bvh.boxv_t;\n    var boxc_t = bvh.boxc_t;\n\n    box_make_empty_0(boxv_o);\n    box_make_empty_0(boxc_o);\n    box_make_empty_0(boxv_t);\n    box_make_empty_0(boxc_t);\n\n    var c = bvh.centroids;\n    var b = bvh.finfo.boxes;\n    var boxStride = bvh.finfo.boxStride;\n\n    for (var i = 0, iEnd = bvh.prim_count; i < iEnd; i++) {\n\n      // find which primitive in the sorted list to use next\n      var p = bvh.primitives[i];\n      box_get_centroid(c, 3 /*POINT_STRIDE*/ * p, b, boxStride * p);\n\n      if (i >= bvh.first_transparent) {\n\n        box_add_point_0(boxc_t, c, 3 /*POINT_STRIDE*/ * p);\n        box_add_box_0(boxv_t, b, boxStride * p);\n\n      } else {\n\n        box_add_point_0(boxc_o, c, 3 /*POINT_STRIDE*/ * p);\n        box_add_box_0(boxv_o, b, boxStride * p);\n\n      }\n    }\n\n    box_get_size(cbdiag, 0, bvh.boxv_o, 0);\n    var maxsz = Math.max(cbdiag[0], cbdiag[1], cbdiag[2]);\n    bvh.scene_epsilon = BOX_EPSILON * maxsz;\n  }\n\n\n\n\n  //Module exports\n  return {\n    bvh_subdivide: bvh_subdivide,\n    compute_boxes: compute_boxes,\n    box_area: box_area };\n\n\n}();\n\n\nfunction FragInfo(fragments, materialDefs) {\n  //Invariants\n  this.boxes = fragments.boxes; //Array of Float32, each bbox is a sextuplet\n  this.polygonCounts = fragments.polygonCounts;\n  this.hasPolygonCounts = !!this.polygonCounts;\n  this.materials = fragments.materials; //material indices (we need to know which fragments are transparent)\n  this.materialDefs = materialDefs;\n  this.count = fragments.length;\n  this.boxStride = 6;\n  this.wantSort = true;\n}\n\nFragInfo.prototype.getCount = function () {\n  return this.count;\n};\n\nFragInfo.prototype.isTransparent = function (i) {\n  return this.materialDefs && this.materialDefs[this.materials[i]] ? this.materialDefs[this.materials[i]].transparent : false;\n};\n\nFragInfo.prototype.getPolygonCount = function (i) {\n  return this.polygonCounts[i];\n};\n\n/**\n    * Given a list of LMV fragments, builds a spatial index for view-dependent traversal and hit testing.\n    * @constructor\n    */\nexport function BVHBuilder(fragments, materialDefs, finfo) {\n\n  //Initialize the inputs (bboxes, transparent flags, polygon counts)\n  this.finfo = finfo || new FragInfo(fragments, materialDefs);\n\n  this.prim_count = this.finfo.getCount();\n\n  //To be initialized by build() function based on build options\n  this.frags_per_leaf_node = -1;\n  this.frags_per_inner_node = -1;\n  this.nodes = null;\n\n  this.work_buf = new ArrayBuffer(this.prim_count * 4);\n  this.sort_prims = new Int32Array(this.work_buf);\n\n  //Allocate memory buffer for re-ordered fragment primitive indices,\n  //which will be sorted by node ownership and point to the index\n  //of the fragment data.\n  this.primitives = new Int32Array(this.prim_count);\n\n  //The BVH split algorithm works based on centroids of the bboxes.\n  this.centroids = new Float32Array(POINT_STRIDE * this.prim_count);\n\n  //BBoxes and centroid bboxes for opaque and transparent primitive sets\n  this.boxv_o = new Float32Array(6);\n  this.boxc_o = new Float32Array(6);\n  this.boxv_t = new Float32Array(6);\n  this.boxc_t = new Float32Array(6);\n\n\n  this.recursion_stack = [];\n}\n\nBVHBuilder.prototype.sortPrimitives = function (wantSort) {\n\n  var prim_sizes = new Float32Array(this.work_buf);\n  var primitives = this.primitives;\n  var numTransparent = 0;\n\n  //Sort the input objects by size\n  //We assume all LMV SVF files come\n  //sorted by draw priority already, so in theory we can skip this step.\n  //This turns out to not be the case - some fragments are badly sorted.\n  //Part of the reason may be that the surface area of the geometry itself,\n  //not its bounding box, is used to sort by physical size in LMVTK.\n  //In any case, the transparent objects do not always come last (bug in LMVTK?),\n  //so we still have to pull them out to the end of the list, so some sorting\n  //takes place no matter how this value is set.\n  // Turning this option on will mean that the BVH building process as a whole\n  // will be 45% to 75% longer, for large models - full sorting takes awhile.\n  // In absolute terms this is an increase of a maximum of 1.15 seconds for a\n  // very large model (one with over 1 million fragments, i.e., mesh instances).\n  // This cost may be acceptable. For smaller models - \"only\" 70K instances -\n  // the cost is 0.05 seconds. For 130k instances, 0.1 seconds. The rise is\n  // slightly more than linear, but not excessively slow. I think it's acceptable,\n  // given that the cost is still much less than loading even a small part of the\n  // model.\n  var doSort = wantSort;\n\n  // console.log(\"BVH sort is \" + WANT_SORT);\n\n  var i, iEnd;\n  for (i = 0, iEnd = this.prim_count; i < iEnd; i++) {\n\n    //Start with trivial 1:1 order of the indices array\n    primitives[i] = i;\n\n    var transparent = this.finfo.isTransparent(i);\n\n    if (transparent)\n    numTransparent++;\n\n    if (doSort) {\n      prim_sizes[i] = BVHModule.box_area(this.finfo.boxes, this.finfo.boxStride * i);\n\n      //In order to make transparent objects appear last,\n      //we give them a negative size, so that they are naturally\n      //sorted last in the sort by size.\n      if (transparent)\n      prim_sizes[i] = -prim_sizes[i];\n    } else {\n      //We still need the transparency flag for the loop below\n      //where we find the last opaque item, but we can\n      //short-cut the size computation.\n      prim_sizes[i] = transparent ? -1 : 1;\n    }\n  }\n\n\n  if (doSort) {\n    Array.prototype.sort.call(this.primitives, function (a, b) {\n      return prim_sizes[b] - prim_sizes[a];\n    });\n  } else {\n    if (numTransparent && numTransparent < this.prim_count) {\n\n      var tmpTransparent = new Int32Array(numTransparent);\n      var oidx = 0,tidx = 0;\n\n      for (i = 0, iEnd = this.prim_count; i < iEnd; i++) {\n        if (prim_sizes[i] >= 0)\n        primitives[oidx++] = primitives[i];else\n\n        tmpTransparent[tidx++] = primitives[i];\n      }\n\n      primitives.set(tmpTransparent, this.prim_count - numTransparent);\n    }\n  }\n\n  this.first_transparent = this.prim_count - numTransparent;\n};\n\n\nBVHBuilder.prototype.build = function (options) {\n  //Kick off the BVH build.\n\n  var useSlimNodes = options && !!options.useSlimNodes;\n\n  var self = this;\n  function assign_option(name, defaultVal) {\n    if (options.hasOwnProperty(name))\n    self[name] = options[name];else\n\n    self[name] = defaultVal;\n  }\n\n  // note: frags_per_leaf_node does *not* make an upper limit for the number of frags per node.\n\n  //options for build optimized for rasterization renderer scenes\n  if (useSlimNodes) {\n    assign_option(\"frags_per_leaf_node\", 1);\n    assign_option(\"frags_per_inner_node\", 0);\n    assign_option(\"frags_per_leaf_node_transparent\", 1);\n    assign_option(\"frags_per_inner_node_transparent\", 0);\n    assign_option(\"max_polys_per_node\", Infinity);\n  } else {\n    var multiplier = options.isWeakDevice ? 0.5 : 1.0;\n\n    //TODO: tune these constants\n    assign_option(\"frags_per_leaf_node\", 0 | 256 * multiplier);\n    //Placing fragments at inner nodes places more emphasis on bigger objects during tree traversal\n    //but it can only be done for opaque objects. Transparent objects have to be strictly back to front\n    //traversal regardless of size, unless a unified traversal\n    assign_option(\"frags_per_inner_node\", 0 | this.frags_per_leaf_node);\n    assign_option(\"frags_per_leaf_node_transparent\", this.frags_per_leaf_node);\n    assign_option(\"frags_per_inner_node_transparent\", 0);\n    assign_option(\"max_polys_per_node\", 0 | 20000 * multiplier);\n  }\n\n  //Reuse existing node array if there\n  if (this.nodes && this.nodes.is_lean_node == useSlimNodes)\n  this.nodes.nodeCount = 0;else\n  {\n    var est_nodes = this.prim_count / this.frags_per_leaf_node;\n    var num_nodes = 1;\n    while (num_nodes < est_nodes) {\n      num_nodes *= 2;}\n\n    this.nodes = new NodeArray(num_nodes, options ? options.useSlimNodes : false);\n  }\n\n  this.sortPrimitives(this.finfo.wantSort);\n\n  BVHModule.compute_boxes(this);\n\n  //Init the root nodes at 0 for opaque\n  //and 1 for transparent objects\n  var root = this.nodes.nextNodes(2);\n\n  //Now kick off the recursive tree build\n\n  //Opaque\n  BVHModule.bvh_subdivide(this, root, 0, this.first_transparent - 1, this.boxv_o, this.boxc_o, false, 0);\n\n  var a;\n  while (this.recursion_stack.length) {\n    a = this.recursion_stack.pop();\n    BVHModule.bvh_subdivide(a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7]);\n  }\n\n  //Transparent\n  BVHModule.bvh_subdivide(this, root + 1, this.first_transparent, this.prim_count - 1, this.boxv_t, this.boxc_t, true, 0);\n\n  while (this.recursion_stack.length) {\n    a = this.recursion_stack.pop();\n    BVHModule.bvh_subdivide(a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7]);\n  }\n};","import * as globals from \"../globals.js\";\nimport { isNodeJS } from \"../../compat\";\nimport * as THREE from \"three\";\nimport { logger } from \"../../logger/Logger\";\n\n//Finds a precanned BufferAttribute corresponding to the given\n//attribute data, so that we don't have to allocate the same exact\n//one over and over and over.\nvar bufattrs = {};\n\nfunction findBufferAttribute(attributeName, attributeData, numInstances) {\n\n  //Note .array could be undefined in case we are using\n  //an interleaved buffer.\n  var attr;\n  if (attributeData.array) {\n    attr = new THREE.BufferAttribute(attributeData.array, attributeData.itemSize);\n  } else\n  {\n    var id = attributeName + \"|\" +\n    attributeData.bytesPerItem + \"|\" +\n    attributeData.normalize + \"|\" +\n    attributeData.isPattern + \"|\" +\n    attributeData.divisor + \"|\" +\n    attributeData.offset;\n\n    attr = bufattrs[id];\n    if (attr)\n    return attr;\n\n    attr = new THREE.BufferAttribute(undefined, attributeData.itemSize);\n    bufattrs[id] = attr;\n  }\n\n  attr.bytesPerItem = attributeData.bytesPerItem;\n  attr.normalize = attributeData.normalize;\n  attr.isPattern = attributeData.isPattern;\n\n  if (numInstances) {\n    attr.divisor = attributeData.divisor;\n  }\n\n  if (attributeData.array) {\n    //Is the data for the attribute specified separately\n    //from the interleaved VB?\n  } else\n  if (attributeData.hasOwnProperty(\"offset\")) {\n    //If the attribute is in the interleaved VB, it has\n    //an offset into it.\n    attr.itemOffset = attributeData.offset;\n  } else\n  {\n    logger.warn(\"VB attribute is neither interleaved nor separate. Something is wrong with the buffer specificaiton.\");\n  }\n\n  return attr;\n}\n\nvar attrKeys = {};\n\nfunction findAttributesKeys(geometry) {\n  var key = \"\";\n\n  for (var p in geometry.attributes) {\n    key += p + \"|\";}\n\n  var res = attrKeys[key];\n  if (res)\n  return res;\n\n  res = Object.keys(geometry.attributes);\n  attrKeys[key] = res;\n\n  return res;\n}\n\n\nvar indexAttr16;\nvar indexAttr32;\nvar BufferGeometry;\nvar idcounter = 1;\n\nfunction initBufferGeometry() {\n\n  indexAttr16 = new THREE.BufferAttribute(undefined, 1);\n  indexAttr16.bytesPerItem = 2;\n\n  indexAttr32 = new THREE.BufferAttribute(undefined, 1);\n  indexAttr32.bytesPerItem = 4;\n\n  BufferGeometry = function BufferGeometry() {\n\n    //Avoid calling the superclass constructor for performance reasons.\n    //Skips the creation of a uuid and defining an accessor for the .id property.\n    //THREE.BufferGeometry.call(this);\n\n    this.id = idcounter++;\n\n    this.attributes = {};\n\n    //These are properly initialized by meshToGeometr.\n    /*\r\n                this.uuid = null;\r\n                this.name = null;\r\n    \r\n                this.drawcalls = [];\r\n                this.offsets = this.drawcalls; // backwards compatibility\r\n    \r\n                this.boundingBox = null;\r\n                this.boundingSphere = null;\r\n    \r\n                this.numInstances = undefined;\r\n                this.streamingDraw = false;\r\n                this.streamingIndex = false;\r\n                this.svfid = undefined;\r\n    \r\n                this.vb = null;\r\n                this.vbbuffer = undefined;\r\n                this.ib = null;\r\n                this.ibbuffer = undefined;\r\n                this.iblines = null;\r\n                this.iblinesbuffer = undefined;\r\n                this.vaos = undefined;\r\n    \r\n                this.vbNeedsUpdate = false;\r\n                this.vbstride = 0;\r\n                this.byteSize = 0;\r\n    \r\n                this.attributesKeys = undefined;\r\n    */\n    // Note:\n    //  1. Although __webglInit would also be undefined without this assignment, it is still essential\n    //     for performance reasons, because it makes this property known to the JIT compiler. Otherwise,\n    //     it would be attached to each buffer later in WebGLRenderer - which would waste performance.\n    //  2. It is essential to use \"undefined\" and not \"false\" here. The reason is that WebGLRenderer\n    //     only checks in the form \"__webglInit === undefined\", i.e., setting it to \"false\" here would have\n    //     the same effect like setting it to \"true\" and would finally cause a memory leak.\n    this.__webglInit = undefined;\n  };\n\n  BufferGeometry.prototype = Object.create(THREE.BufferGeometry.prototype);\n  BufferGeometry.prototype.constructor = BufferGeometry;\n\n}\n\nexport function createBufferGeometry() {\n  if (!BufferGeometry)\n  initBufferGeometry();\n\n  return new BufferGeometry();\n}\n\n//Converts a mesh description passed back from worker threads into a renderable three.js\n//compatible BufferGeometry.\n//Sets various extra flags we need.\nexport function meshToGeometry(mdata) {\n\n  var mesh = mdata.mesh;\n  var geometry = createBufferGeometry();\n\n  if (isNodeJS()) {\n    //Used by SVF post-processing tools\n    geometry.packId = mdata.packId;\n    geometry.meshIndex = mdata.meshIndex;\n  }\n\n  geometry.byteSize = 0;\n\n  geometry.vb = mesh.vb;\n  geometry.vbbuffer = undefined;\n  geometry.vbNeedsUpdate = true;\n  geometry.byteSize += mesh.vb.byteLength;\n  geometry.hash = mdata.hash;\n\n  geometry.vbstride = mesh.vbstride;\n  if (mesh.isLines) /* mesh is SVF lines */\n    geometry.isLines = mesh.isLines;\n  if (mesh.isWideLines) {/* mesh is SVF wide lines */\n    geometry.isWideLines = true;\n    geometry.lineWidth = mesh.lineWidth;\n  }\n  if (mesh.isPoints) {/* mesh is SVF points */\n    geometry.isPoints = mesh.isPoints;\n    geometry.pointSize = mesh.pointSize;\n  }\n  if (mdata.is2d) /* mesh is from F2D */{\n      geometry.is2d = true;\n    }\n\n  geometry.numInstances = mesh.numInstances;\n\n  for (var attributeName in mesh.vblayout) {\n    var attributeData = mesh.vblayout[attributeName];\n\n    //geometry.addAttribute(attributeName, findBufferAttribute(attributeData, geometry.numInstances));\n    geometry.attributes[attributeName] = findBufferAttribute(attributeName, attributeData, geometry.numInstances);\n  }\n\n  //Index buffer setup\n  if (!globals.memoryOptimizedLoading) {\n    var iAttr = new THREE.BufferAttribute(mesh.indices, 1);\n    iAttr.bytesPerItem = mesh.indices instanceof Uint32Array ? 4 : 2;\n    geometry.addAttribute(\"index\", iAttr);\n  } else {\n\n    geometry.attributes.index = mesh.indices instanceof Uint32Array ? indexAttr32 : indexAttr16;\n    geometry.ib = mesh.indices;\n    geometry.ibbuffer = undefined;\n\n    if (mesh.iblines) {\n      geometry.attributes.indexlines = mesh.iblines instanceof Uint32Array ? indexAttr32 : indexAttr16;\n      geometry.iblines = mesh.iblines;\n      geometry.iblinesbuffer = undefined;\n    }\n  }\n\n  geometry.attributesKeys = findAttributesKeys(geometry);\n\n  geometry.byteSize += mesh.indices.byteLength;\n\n  //TODO: Not sure chunking into list of smaller offset/counts\n  //is required for LMV data since it's already broken up.\n  //if (mesh.indices.length > 65535)\n  // Works fine now. Left in for debugging.\n  //if (mesh.vb.length / mesh.vbstride > 65535)\n  //    logger.warn(\"Mesh with \" + (mesh.vb.length / mesh.vbstride) + \" > 65535 vertices. It will fail to draw.\");\n\n  //TODO: This is a transient object that gets freed once the geometry\n  //is added to the GeometryList. We can save on the object creation\n  //eventually when we do micro optimizations.\n  geometry.boundingBox = new THREE.Box3().copy(mesh.boundingBox);\n  geometry.boundingSphere = new THREE.Sphere().copy(mesh.boundingSphere);\n\n  //MEM\n  /*\r\n  geometry.drawcalls = null;\r\n  geometry.offsets = null;\r\n  */\n\n  mdata.geometry = geometry;\n\n  mdata.mesh = null;\n}\n\nexport var BufferGeometryUtils = {\n  meshToGeometry: meshToGeometry,\n  createBufferGeometry: createBufferGeometry,\n  findBufferAttribute: findBufferAttribute };","import { getVertexCount, enumMeshTriangles, enumMeshVertices } from './VertexEnumerator';\nimport { LmvVector3 } from './LmvVector3';\nimport { LmvBox3 } from './LmvBox3';\n\n\n//It's important for this function to remain outside the closure of remapVertices.\n//Otherwise V8 will try to JIT optimize it for every mesh, which make things very slow.\nfunction getVertexIndex(v, i, uniqueV, SCALE, remap) {\n  var x = 0 | v.x * SCALE;\n  var y = 0 | v.y * SCALE;\n  var z = 0 | v.z * SCALE;\n\n  var mx = uniqueV[x];\n  if (!mx) {\n    uniqueV[x] = mx = {};\n  }\n\n  var my = mx[y];\n  if (!my) {\n    mx[y] = my = {};\n  }\n\n  var mz = my[z];\n  if (mz === undefined) {\n    my[z] = mz = i;\n  }\n\n  remap[i] = mz;\n}\n\n\nfunction remapVertices(geom, boundingBox) {\n  //de-duplicate vertices based on position only (ignoring normals)\n\n  var remap = [];\n  var uniqueV = {};\n\n  var boxScale = 1.0;\n  if (geom.boundingBox || boundingBox) {\n    var bbox = new LmvBox3().copy(geom.boundingBox || boundingBox);\n    var sz = bbox.size();\n    boxScale = Math.max(sz.x, Math.max(sz.y, sz.z));\n  }\n\n  var SCALE = (1 << 16) / boxScale; //snap scale, assuming unit mesh\n\n  function remapcb(v, n, uv, i) {\n    getVertexIndex(v, i, uniqueV, SCALE, remap);\n  }\n\n  enumMeshVertices(geom, remapcb);\n\n  return remap;\n}\n\n\nfunction transformVertices(geom, toWorld) {\n\n  var vbuf = new Float32Array(3 * getVertexCount(geom));\n\n  function cb(v, n, uv, i) {\n    vbuf[3 * i] = v.x;\n    vbuf[3 * i + 1] = v.y;\n    vbuf[3 * i + 2] = v.z;\n  }\n\n  enumMeshVertices(geom, cb, toWorld);\n\n  return vbuf;\n}\n\nexport function createWireframe(geom, toWorld, boundingBox, wantAllTriangleEdges) {\n\n  if (geom.isLines)\n  return;\n\n  if (geom.iblines)\n  return;\n\n  //find unique vertices\n  var remap = remapVertices(geom, boundingBox);\n\n  //get vertices in world space -- we need this for\n  //correct angle calculations\n  var worldVerts = transformVertices(geom, toWorld);\n\n  //loop over all triangles, keeping track of\n  //edges that seem important\n  var seenEdges = {};\n\n  var edgeIB = [];\n\n  var _v1 = new LmvVector3();\n  var _v2 = new LmvVector3();\n  var _v3 = new LmvVector3();\n  var _n1 = new LmvVector3();\n  var _n2 = new LmvVector3();\n\n  function getV(i, v) {\n    v.x = worldVerts[3 * i];\n    v.y = worldVerts[3 * i + 1];\n    v.z = worldVerts[3 * i + 2];\n  }\n\n  function getNormal(i1, i2, i3, n) {\n    getV(i1, _v1);\n    getV(i2, _v2);\n    getV(i3, _v3);\n\n    _v2.sub(_v1);\n    _v3.sub(_v1);\n    _v2.cross(_v3);\n\n    n.copy(_v2).normalize();\n  }\n\n  function doOneEdge(i1orig, i2orig, opp1orig) {\n\n    var i1 = remap[i1orig];\n    var i2 = remap[i2orig];\n    var opp1 = remap[opp1orig];\n\n    //Ignore degenerates\n    if (i1 === i2 || i1 === opp1 || i2 === opp1)\n    return;\n\n    var reversed = false;\n    if (i1 > i2) {\n      var tmp = i1;\n      i1 = i2;\n      i2 = tmp;\n      reversed = true;\n    }\n\n    var e1 = seenEdges[i1];\n    if (e1) {\n      var opp2orig = e1[i2];\n      if (opp2orig === undefined) {\n        e1[i2] = reversed ? -opp1orig - 1 : opp1orig;\n      } else {\n        //We now know two triangles that share this edge,\n        //we can check if it's important\n\n        if (!wantAllTriangleEdges) {\n          //Use original indices, so that we\n          //can do the math with the correct winding order\n          getNormal(i1orig, i2orig, opp1orig, _n1);\n\n          if (opp2orig < 0) {\n            getNormal(i2, i1, remap[-opp2orig - 1], _n2);\n          } else {\n            getNormal(i1, i2, remap[opp2orig], _n2);\n          }\n\n          var dot = _n1.dot(_n2);\n\n          if (Math.abs(dot) < 0.25) {\n            edgeIB.push(i1orig);\n            edgeIB.push(i2orig);\n          }\n        } else {\n          edgeIB.push(i1orig);\n          edgeIB.push(i2orig);\n        }\n\n        delete e1[i2];\n      }\n    } else {\n      seenEdges[i1] = {};\n      seenEdges[i1][i2] = opp1orig;\n    }\n  }\n\n  function tricb(vA, vB, vC, iA, iB, iC) {\n    doOneEdge(iA, iB, iC);\n    doOneEdge(iB, iC, iA);\n    doOneEdge(iC, iA, iB);\n  }\n\n  //find edges that have neighboring triangles at sharp angle\n  enumMeshTriangles(geom, tricb);\n\n  //process remaining edges (outer edges that only have one triangle)\n\n  for (var i1 in seenEdges) {\n    for (var i2 in seenEdges[i1]) {\n      edgeIB.push(parseInt(i1));\n      edgeIB.push(parseInt(i2));\n    }\n  }\n\n\n  if (edgeIB.length > 1) {\n    geom.iblines = new Uint16Array(edgeIB.length);\n    geom.iblines.set(edgeIB);\n  }\n\n  /*\n        for (var i=0; i<geom.ib.length; i++) {\n            geom.ib[i] = remap[geom.ib[i]];\n        }\n        */\n}","import { memoryOptimizedLoading } from '../globals';\nimport * as THREE from \"three\";\nimport { MeshFlags } from \"./MeshFlags\";\nimport { logger } from \"../../logger/Logger\";\nimport { allocateUintArray, reallocateUintArrayMaybe } from \"./IntArray\";\nimport { VertexBufferReader } from './VertexBufferReader';\nimport { VertexBufferWriter } from './VertexBufferWriter';\nimport { Viewer3D } from '../../application/Viewer3D';\n\n\nvar _tmpMatrix = new THREE.Matrix4();\nvar _tmpBox = new THREE.Box3();\nvar _tmpRot = new THREE.Quaternion();\nvar _tmpPos = new THREE.Vector3();\nvar _tmpScale = new THREE.Vector3();\n\n/**\n                                      * Represents the full list of all geometry instances associated with\n                                      * a particular model. The order in the list is 1:1 with fragment list\n                                      * in the source LMV/SVF package file.\n                                      * @param {Object} fragments - Fragment data parsed from an SVF file.\n                                      * @param {GeometryList} geoms - Geometry data parsed from an SVF file.\n                                      * @constructor\n                                      */\nexport function FragmentList(model) {\n\n  this.is2d = model.is2d();\n  this.modelId = model.getModelId();\n  this.fragments = model.getData().fragments;\n  this.geoms = model.getGeometryList();\n\n  //3D SVF files are of known initial size and known world bounds.\n  //2D F2D files start out with nothing and get filled up as we load.\n  //NOTE: There is a bug here when we have an SVF file with known zero fragments -- it will\n  //go into the slower non-fixed size code path. But it doesn't matter, because it's an empty file.\n  this.isFixedSize = this.fragments.length > 0;\n  if (this.isFixedSize) {\n    this.boxes = this.fragments.boxes; // Float32Array, stores Boxes as 6 floats per fragment (after applying mesh matrix)\n    this.transforms = this.fragments.transforms; // Float32Array, stores transforms as 12 floats per fragment (Matrix4 with omitted last row)\n    this.useThreeMesh = !memoryOptimizedLoading;\n  } else {\n    this.boxes = null;\n    this.transforms = null;\n    this.useThreeMesh = true; //This code path will be used for 2D drawings, which stream in with unknown number of meshes\n  }\n\n  // initial length for arrays of meshes/geometries/flags\n  // Can be zero.\n  var initialSize = this.fragments.length;\n\n  this.vizflags = new Uint16Array(initialSize); // visibility/highlight mode flags\n\n  //This will be the list of all mesh instances in the model.\n  //Corresponds to all fragments in the case of SVF.\n  if (this.useThreeMesh)\n  this.vizmeshes = new Array(initialSize);\n\n  if (model.isOTG()) {\n    var stats = model.getData().metadata.stats;\n    var nm = stats.num_materials;\n    var ng = stats.num_geoms;\n\n    this.materialids = allocateUintArray(initialSize, nm);\n    this.geomids = allocateUintArray(initialSize, ng);\n  } else {\n    this.geomids = new Int32Array(initialSize); // geomid per fragId. geomids are resolved by this.geoms.GetGeometry(geomid) to obtain BufferGeometry.\n    this.materialids = new Int32Array(initialSize); // material per fragId. matIds  are resolved by this.materialmap[matId]\n  }\n  this.materialmap = {}; // map from material ids to THREE.ShaderMaterial instances\n  this.materialIdMap = {};\n  this.nextMaterialId = 1;\n\n  // theming (coloring based on id)\n  this.db2ThemingColor = []; // empty if no theming is applied. A theming color db2ThemingColor[dbId] is stored as THREE.Vector4 with values in [0,1].\n  this.originalColors = []; // if vizmesh[i] has modified vertex-colors  due to theming,  originalColors[i]  stores a copy of the original colors.\n  this.themingOrGhostingNeedsUpdate = []; // indicates if vertex-colors of vizmesh[i] needs to be updated based on recent theming or ghosting changes.\n  this.dbIdOpacity = []; // ids with overridden opacity, or hidden by setting alpha to 0\n\n  // ghosting for 2d objects: A ghosted object is reduced in transparency and blended with the pageColor.\n  this.dbIdIsGhosted = [];\n\n  this.animxforms = null; // If animation is used, this is a Float32Array storing 10 floats per fragment to describe scale (3), rotation (4), and translation (3).\n  // See this.updateAnimTransform.\n\n  for (var i = 0; i < initialSize; i++) {\n    this.vizflags[i] = 1; //MESH_VISIBLE initially\n  }\n\n  // Set the visflags from the fragment visibility, if there is any.\n  // For OTG, the flags are not fully loaded at this point. Otg flags are handled in setMesh().\n  if (!model.isOTG() && this.fragments.visibilityFlags) {\n    this.vizflags.set(this.fragments.visibilityFlags);\n  }\n\n  this.allVisible = true; // see this.areAllVisible(..). Indicates if MESH_VISIBLE flag is set for all meshes (i.e., not considering culling)\n  this.allVisibleDirty = true; // if true, this.allVisible is outdated and must be recomputed in this.areAllVisible.\n  this.nextAvailableFragID = initialSize;\n\n  // Visibility of lines and points is independent of per-fragment visibility flags\n  this.linesHidden = false;\n  this.pointsHidden = false;\n\n  // Optional: Additional transform applied to the whole model \n  this.matrix = null;\n\n  // TODO: comment out; for debug\n  //this.geomCount = 0;\n  //this.geomMax = 100;\n}\n\n// [HB:] This method is only used in RenderModel.setFragment(), which seems to be not called at all. Can we remove this?\n//       (including the nextAvailableFragID member and RenderModel.setFragment).\nFragmentList.prototype.getNextAvailableFragmentId = function () {\n  return this.nextAvailableFragID++;\n};\n\n// [HB:] When does this method ever return true? vizflags is resized in SetMesh, which only used in RenderModel.activateFragment and \n//       RenderModel.setFragment (never called). RenderModel.activateFragment(..) is only used by loaders when new fragments have been loaded.\n//       However, for SvfLoader, fragments.length is always the full fragments count and for F2D, new stuff is first added to fragments, then\n//       to VisFlags. \n//       Maybe this should actually be a \"<\" and is only relevant for F2D case?\nFragmentList.prototype.fragmentsHaveBeenAdded = function () {\n  return this.vizflags.length > this.fragments.length;\n};\n\n// Returns undefined if fragId has no material \nFragmentList.prototype.getSvfMaterialId = function (fragId) {\n  var mat = this.getMaterial(fragId);\n  return mat ? mat.svfMatId : undefined;\n};\n\n/**\n    * Set mesh for a fragment, replacing any temporary previous one.\n    * @param {number} fragId - Fragment ID\n    * @param {Object} meshinfo - Object as defined in Viewer3DImpl.setupMesh(..). Contains:\n    *      geometry: instanceof BufferGeometry\n    *      material: instance of THREE.Material\n    *      matrix:   instanceof THREE.Matrix4\n    *      bbox:     Optional world space bounding box\n    *      isLine:   bool to mark line geometry\n    *      isWideLine: bool to mark wide line geometry\n    *      isPoint:   bool to mark point geometry\n    *      is2D:     bool to indicate 2D geometry (e.g., set by F2DLoader) \n    * @param {bool} updateFragmentData - If true, this.bbox and this.transforms is also updated for this fragment.\n    *      Only allowed if this.isFixedSize==true. (otherwise, this.boxes and this.transforms is null)\n    * @param {bool} [retainMesh] - If true, meshInfo is a THREE.Mesh and this.useThreeMesh, then\n    *      meshInfo will be used as the THREE.Mesh for the fragment.\n    */\nFragmentList.prototype.setMesh = function (fragId, meshInfo, updateFragmentData, retainMesh) {\n\n  //Remove any temporary geometry we used for the fragment\n  //while it was loading\n  if (this.vizmeshes) {\n    var oldGeom = this.vizmeshes[fragId];\n    if (oldGeom && oldGeom.parent) {\n      oldGeom.parent.remove(oldGeom);\n    }\n  }\n\n  //The various data arrays need to be re-sized if the fragment is new\n  //so we have to do it manually in case this happens. \n  if (this.vizflags.length <= fragId) {\n\n    // Gradually should only used if isFixedSize is false (as used for F2D geometry)\n    if (this.isFixedSize) {\n      logger.warn(\"Attempting to resize a fragments list that was initialized with fixed data. This will have a performance impact.\");\n      this.isFixedSize = false;\n    }\n\n    // determine new length of all per-fragmentId arrays\n    var nlen = Math.ceil(1.5 * Math.max(this.vizflags.length, fragId)) || 1;\n    if (this.useThreeMesh && nlen < this.vizmeshes.length)\n    nlen = this.vizmeshes.length;\n\n    // re-allocate vizflags\n    var nflags = new Uint16Array(nlen);\n    nflags.set(this.vizflags);\n    this.vizflags = nflags;\n\n    // re-allocate other per-fragmentId arrays...\n\n    if (this.transforms) {\n      var ntransforms = new Float32Array(nlen * 12);\n      ntransforms.set(this.transforms);\n      this.transforms = ntransforms;\n    }\n\n    if (this.boxes) {\n      var nboxes = new Float32Array(nlen * 6);\n      nboxes.set(this.boxes);\n      this.boxes = nboxes;\n    }\n\n    if (this.geomids) {\n      var nids = new Int32Array(nlen);\n      nids.set(this.geomids);\n      this.geomids = nids;\n\n    }\n\n    if (this.materialids) {\n      var nmids = new Int32Array(nlen);\n      nmids.set(this.materialids);\n      this.materialids = nmids;\n    }\n  }\n\n  //Remember the mesh in the frag->viz mesh array\n  if (this.useThreeMesh) {\n    var mesh;\n    if (retainMesh && meshInfo instanceof THREE.Mesh) {\n      mesh = meshInfo;\n\n      if (meshInfo.matrix) {\n        mesh.matrixWorld.copy(meshInfo.matrix);\n      }\n\n      mesh.dbId = mesh.dbId || 0;\n    } else {\n      mesh = new THREE.Mesh(meshInfo.geometry, meshInfo.material);\n\n      // Copy matrix to mesh.matrix and mesh.matrixWorld\n      // [HB:] Why copying twice?\n      if (meshInfo.matrix) {\n        if (mesh.matrix) {\n          mesh.matrix.copy(meshInfo.matrix);\n        }\n        mesh.matrixWorld.copy(meshInfo.matrix);\n      }\n\n      mesh.is2d = meshInfo.is2d;\n      mesh.isLine = meshInfo.isLine;\n      mesh.isWideLine = meshInfo.isWideLine;\n      mesh.isPoint = meshInfo.isPoint;\n\n      mesh.dbId = this.fragments.fragId2dbId[fragId] | 0;\n    }\n\n    // If we would leave that true, THREE.js would call UpdateMatrix() for this mesh and \n    // overwrite the matrix with another one computed by position, scale, and quaternion.\n    mesh.matrixAutoUpdate = false;\n\n    //Add the mesh to the render group for this fragment\n    //Note each render group renders potentially many fragments.\n    mesh.frustumCulled = false; //we do our own culling in RenderQueue, the renderer doesn't need to\n\n    // keep fragId and dbId\n    mesh.fragId = fragId;\n    mesh.modelId = this.modelId;\n\n    // If a model matrix already exists, update matrixWorld (like it's done in setModelMatrix)\n    // It's possible that the matrix was set before all vizmeshes were set.\n    if (this.matrix) {\n      mesh.matrixWorld.multiplyMatrices(this.matrix, mesh.matrix);\n    }\n    // cache the mesh in this.vizmeshes\n    this.vizmeshes[fragId] = mesh;\n  } else {\n    // When not using THREE.Mesh, store ids of BufferGeometry and material instead\n\n    // Handle shared Otg geoms: If the geometry contains a hash, it is a shareable Otg geometry. For these,\n    // we cannot use svfid, because the geomId may vary per model.\n    //  => For this case, the geomId must be provided separately by the meshInfo\n    var geomId = undefined;\n    if (meshInfo.geometry.hash) {\n      // shared otg geom\n      if (meshInfo.geomId === undefined) {\n        console.error(\"meshInfo must provide geomId\");\n      }\n      geomId = meshInfo.geomId;\n    } else {\n      // svf geom\n      geomId = meshInfo.geometry.svfid;\n    }\n\n    this.geomids[fragId] = geomId;\n\n    this.setMaterial(fragId, meshInfo.material);\n  }\n\n  // Don't override the visibility flag which could be set before geometry is ready.\n  // This can improve the performance when streaming geometry and rendering happen together.\n  var typeFlags = 0;\n  if (meshInfo.isLine) typeFlags = MeshFlags.MESH_ISLINE;else\n  if (meshInfo.isWideLine) typeFlags = MeshFlags.MESH_ISWIDELINE;else\n  if (meshInfo.isPoint) typeFlags = MeshFlags.MESH_ISPOINT;\n  if (!this.isFixedSize) {\n    this.vizflags[fragId] |= MeshFlags.MESH_VISIBLE | typeFlags;\n  } else\n  {\n    this.vizflags[fragId] |= typeFlags;\n  }\n\n  if (updateFragmentData && this.transforms && this.boxes) {\n    // Update transform and bb\n    var transform = meshInfo.matrix;\n\n    // Copy the transform to the fraglist array\n    // We store in column-major order like the elements of the Matrix4, but skip row 3.\n    var i = fragId * 12;\n    var cur = transform.elements;\n    var orig = this.transforms;\n    orig[i] = cur[0];\n    orig[i + 1] = cur[1];\n    orig[i + 2] = cur[2];\n    orig[i + 3] = cur[4];\n    orig[i + 4] = cur[5];\n    orig[i + 5] = cur[6];\n    orig[i + 6] = cur[8];\n    orig[i + 7] = cur[9];\n    orig[i + 8] = cur[10];\n    orig[i + 9] = cur[12];\n    orig[i + 10] = cur[13];\n    orig[i + 11] = cur[14];\n\n    // When using Otg, computed bboxes are only used until we get the actual ones from fragments_extra.\n    // Once loaded, they must not be overwritten by computed ones (which are too large in some cases).\n    if (!this.fragments.boxesLoaded) {\n      if (meshInfo.bbox) {\n        _tmpBox.copy(meshInfo.bbox);\n      } else {\n        // Transform the local BB to world\n        if (meshInfo.geometry && meshInfo.geometry.boundingBox) {\n          _tmpBox.copy(meshInfo.geometry.boundingBox);\n        } else {\n          this.geoms.getModelBox(this.geomids[fragId], _tmpBox);\n        }\n\n        if (!_tmpBox.empty()) {\n          _tmpBox.applyMatrix4(transform);\n        }\n      }\n\n      // Write bounding box to this.boxes\n      var boffset = fragId * 6;\n      var bb = this.boxes;\n      bb[boffset] = _tmpBox.min.x;\n      bb[boffset + 1] = _tmpBox.min.y;\n      bb[boffset + 2] = _tmpBox.min.z;\n      bb[boffset + 3] = _tmpBox.max.x;\n      bb[boffset + 4] = _tmpBox.max.y;\n      bb[boffset + 5] = _tmpBox.max.z;\n    }\n  }\n};\n\n\nFragmentList.prototype.isFlagSet = function (fragId, flag) {\n  return !!(this.vizflags[fragId] & flag);\n};\n\n/**\n    * Set/unset flag of a fragment.\n    * Note: Changing MESH_VISIBLE requires to update allVisibleDirty as well => Use setVisibility() for this case.\n    * @param {number} fragId - Fragment ID.\n    * @param {number} flag - Must be one of the flags defined at the beginning of this file, e.g., MESH_HIGHLIGHTED.\n    * @returns {bool} False if nothing changed.\n    */\nFragmentList.prototype.setFlagFragment = function (fragId, flag, value) {\n\n  // If flag is already defined and has this value, just return false.\n  var old = this.vizflags[fragId];\n  if (!!(old & flag) == value) // \"!!\" casts to boolean, \"==\" is intentional.\n    return false;\n\n  // set or unset flag\n  if (value)\n  this.vizflags[fragId] = old | flag;else\n\n  this.vizflags[fragId] = old & ~flag;\n\n  return true;\n};\n\n/**\n    * Set/unset flag for all fragments, e.g. setFlagGlobal(MESH_VISIBLE, true);\n    * Note: Changing MESH_VISIBLE requires to update allVisibleDirty as well => use setAllVisibility() for this case.\n    * @param {number} flag - Must be one of the flags defined at the beginning of this file, e.g., MESH_HIGHLIGHTED.\n    * @param {bool} value - Value to be set to the flag\n    */\nFragmentList.prototype.setFlagGlobal = function (flag, value) {\n  var vizflags = this.vizflags;\n  var i = 0,iEnd = vizflags.length;\n  if (value) {\n    for (; i < iEnd; i++) {\n      vizflags[i] = vizflags[i] | flag;\n    }\n  } else {\n    var notflag = ~flag;\n    for (; i < iEnd; i++) {\n      vizflags[i] = vizflags[i] & notflag;\n    }\n  }\n};\n\n/**\n    * Marks all lines as visible or hidden.\n    * Works like this.setFlagGlobal(MESH_HIDE, hide), but only affects fragments with MESH_ISLINE flag.\n    * @param {bool} hide - Desired visibility status.\n    */\nFragmentList.prototype.hideLines = function (hide) {\n  this.linesHidden = hide;\n};\n\n/**\n    * Marks all points as visible or hidden.\n    * Works like this.setFlagGlobal(MESH_HIDE, hide), but only affects fragments with MESH_ISPOINT flag.\n    * @param {bool} hide - Desired visibility status.\n    */\nFragmentList.prototype.hidePoints = function (hide) {\n  this.pointsHidden = hide;\n};\n\n/**\n    * Marks all fragments with the given flag as visible or hidden.\n    * Works like this.setFlagGlobal(MESH_HIDE, hide), but only affects fragments with given flag.\n    * @param {number} typeFlag - visibility flag of fragments to change\n    * @param {bool} hide - Desired visibility status.\n    */\nFragmentList.prototype.hideFragments = function (typeFlag, hide) {\n\n  var flag = MeshFlags.MESH_HIDE;\n\n  var vizflags = this.vizflags;\n  var i = 0,iEnd = vizflags.length;\n  if (hide) {\n    for (; i < iEnd; i++) {\n      if (vizflags[i] & typeFlag)\n      vizflags[i] = vizflags[i] | flag;\n    }\n  } else {\n    var notflag = ~flag;\n    for (; i < iEnd; i++) {\n      if (vizflags[i] & typeFlag)\n      vizflags[i] = vizflags[i] & notflag;\n    }\n  }\n\n  // Mark allVisible as outdated        \n  this.allVisibleDirty = true;\n};\n\n/**\n    * Checks visibility of a fragment.\n    * @param {number} frag - Fragment ID.\n    * @returns {bool} True if the fragment is visible and not highlighted nor hidden.\n    */\nFragmentList.prototype.isFragVisible = function (frag) {\n  var isHiddenLine = this.linesHidden && (this.isLine(frag) || this.isWideLine(frag));\n  var isHiddenPoint = this.pointsHidden && this.isPoint(frag);\n  return (this.vizflags[frag] & 7 /*MESH_VISIBLE|MESH_HIGHLIGHTED|MESH_HIDE*/) == 1 && !isHiddenLine && !isHiddenPoint;\n};\n\nFragmentList.prototype.isFragOff = function (frag) {\n  return !!(this.vizflags[frag] & MeshFlags.MESH_HIDE);\n};\n\n/*\n    * Returns true if a fragment was excluded from loading or unloaded. \n    *\n    * Note that isNotLoaded()==false does not guarantee that geometry and material are already in memory.\n    * Only vice versa: If true, it will not be loaded at all.\n    */\nFragmentList.prototype.isNotLoaded = function (frag) {\n  return this.vizflags[frag] & MeshFlags.MESH_NOTLOADED;\n};\n\nFragmentList.prototype.isLine = function (frag) {\n  return !!(this.vizflags[frag] & MeshFlags.MESH_ISLINE /*MESH_VISIBLE|MESH_HIGHLIGHTED*/);\n};\n\nFragmentList.prototype.isWideLine = function (frag) {\n  return this.isFlagSet(frag, MeshFlags.MESH_ISWIDELINE);\n};\n\nFragmentList.prototype.isPoint = function (frag) {\n  return this.isFlagSet(frag, MeshFlags.MESH_ISPOINT);\n};\n\n\n// [HB:] This method does not consider the MESH_HIDE flag, but this.setFragOff seems to expect this, because it sets allVisibleDirty.\n//       Is this a bug?\nFragmentList.prototype.areAllVisible = function () {\n\n  // update allVisible if any flags have changed\n  if (this.allVisibleDirty) {\n\n    // allVisible <=> MESH_VISIBLE is set for all fragments\n    var vizflags = this.vizflags;\n    var allVisible = true;\n    for (var i = 0, iEnd = vizflags.length; i < iEnd; i++) {\n      if ((vizflags[i] & 1 /*MESH_VISIBLE*/) === 0) {\n        allVisible = false;\n        break;\n      }\n    }\n\n    this.allVisible = allVisible;\n    this.allVisibleDirty = false;\n  }\n\n  return this.allVisible;\n};\n\n// Swaps r/b channels in a THREE.Color object.\nfunction swapRBChannels(color) {\n  var tmp = color.r;\n  color.r = color.b;\n  color.b = tmp;\n  return color;\n}\n\n/** Linear interpolation between original color and theming color based on theming intensity.\n   * @param origColor    {number}        original uint32 color from vertex-buffer. alpha is vertex-opacity\n   * @param themingColor {THREE.Vector4} theming color as vec4f. Channels are (r,g,b,a) where alpha is theming intensity.\n   * @returns finalColor {number}        final color as uint32\n   */\nvar applyThemingColorAndVisibility = function () {\n  var tmp1 = null;\n  var tmp2 = null;\n  var rgbMask = parseInt(\"00FFFFFF\", 16);\n  var alphaMask = parseInt(\"FF000000\", 16);\n  return function (origColor, themingColor) {\n    if (!tmp1) {\n      tmp1 = new THREE.Color();\n      tmp2 = new THREE.Color();\n    }\n\n    tmp1.set(origColor & rgbMask);\n\n    // THREE.Color denotes uint color in BGRA order (i.e., Blue in the lowest byte).\n    // In the vertex-buffer, we use RGBA - so we have to swap when converting between these two.\n    swapRBChannels(tmp1);\n\n    if (themingColor) {\n      // set tmp2 to theming color\n      tmp2.setRGB(themingColor.x, themingColor.y, themingColor.z);\n\n      // blend original color with theming color\n      tmp1.lerp(tmp2, themingColor.w);\n    }\n\n    // convert back to color-buffer uint32 and preserve original alpha bits\n    return swapRBChannels(tmp1).getHex() | origColor & alphaMask;\n  };\n}();\n\n// Updates the per-vertex array of a mesh to reflect latest theming and ghosting state.\n// Note that this can only work on F2D meshes with known attributes and interleaved vertex buffer.\nfunction updateVertexBufferForThemingAndGhosting(fragList, fragId) {\n\n  // get backup of original per-vertex colors (undef if color array is currently not modified)\n  var origColors = fragList.originalColors[fragId];\n\n  // check if anything changed\n  if (!fragList.themingOrGhostingNeedsUpdate[fragId]) {\n    return;\n  }\n\n  // get values to access colors and ids\n  var geom = fragList.getGeometry(fragId);\n  if (!geom || !geom.vb) return;\n  var vbr = new VertexBufferReader(geom);\n  var vbw = new VertexBufferWriter(geom);\n\n  if (!vbr.isInterleavedVb) {\n    // we cannot work on this mesh.\n    return;\n  }\n\n  // Track if any colors/layers are affected by theming/ghosting. If not, we can drop the color/layer array backup at the end.\n  var themingApplied = false;\n\n  // Constants used for ghosting of 2D objects\n  var PaperLayer = 0; // we use the paper layer to determine the paper sheet background (see F2d.js initSheet). This shape must be excluded from ghosting.\n  var vertexCount = vbr.vcount;\n  // update vertex-color for each vertex\n  for (var i = 0; i < vertexCount; i++) {\n\n    var dbId = vbr.getDbIdAt(i);\n    var color = origColors ? origColors[i] : vbr.getColorAt(i);\n    var layer = vbr.getLayerIndexAt(i);\n\n    // sign extend the upper byte to get back negative numbers (since per-vertex ids are clamped from 32 bit to 24 bit)\n    dbId = dbId << 8 >> 8;\n\n    var isPaper = dbId === -1 && layer === PaperLayer;\n\n    // is this id affected by theming?\n    var themeColor = fragList.db2ThemingColor[dbId];\n    var isHidden = fragList.dbIdOpacity[dbId] === 0;\n\n    if (!themeColor && !isHidden) {\n      // no theming for this vertex\n      if (origColors) {\n        // restore original color\n        color = origColors[i];\n      } // else: if there is no backup array, the vertex-color is already the original.\n    } else {\n      // this vertex-color will be affected by theming.\n      // make sure that we have backup.\n      if (!origColors) {\n        // backup original colors before we modify them.\n        origColors = new Uint32Array(vertexCount);\n        for (var j = 0; j < vertexCount; j++) {\n          origColors[j] = vbr.getColorAt(j);\n        }\n        fragList.originalColors[fragId] = origColors;\n      }\n\n      // replace vertex-color based on theming and visibility\n      if (isHidden) {\n        color = 0;\n      } else {\n        color = applyThemingColorAndVisibility(color, themeColor);\n      }\n\n      // signal that the color backup array is still needed\n      themingApplied = true;\n    }\n\n    if (!isHidden) {\n      var opacity = fragList.dbIdOpacity[dbId];\n      if (!isNaN(opacity)) {\n        var rgbMask = parseInt(\"00FFFFFF\", 16);\n        opacity = 255 * opacity << 24;\n        color = color & rgbMask | opacity;\n      }\n    }\n\n    // color -> vertexBuffer\n    vbw.setColorAt(i, color);\n\n    // is this id affected by theming?\n    var isGhosted = fragList.dbIdIsGhosted[dbId] && !isPaper;\n    var flags = vbr.getVertexFlagsAt(i);\n    if (isGhosted)\n    flags |= 0xff << 24;else\n\n    flags &= ~(0xff << 24);\n\n    // layer -> vertexBuffer\n    vbw.setVertexFlagsAt(i, flags);\n  }\n\n  // if theming is off for all vertices, drop the backup array\n  if (!themingApplied) {\n    fragList.originalColors[fragId] = null;\n  }\n\n  // trigger refresh of GPU-side vertex buffer\n  geom.vbNeedsUpdate = true;\n\n  // don't touch this mesh again until new theming changes are done\n  fragList.themingOrGhostingNeedsUpdate[fragId] = false;\n}\n\n/**\n   * Provides an actual mesh for specific fragment.\n   * NOTE: For (this.useThreeMesh==false), the returned value is volatile and will be overwritten on next call!\n   * @param {number} fragId - Fragment ID.\n   * @returns {THREE.Mesh} Mesh for the given fragment.\n   */\nFragmentList.prototype.getVizmesh = function () {\n\n  //A scratch object that we fill in and return in the case\n  //we don't use THREE.Mesh for persistent storage. If the caller\n  //needs to hold on to the mesh outside the callback scope, it has to clone it.\n\n  var m = new THREE.Mesh(undefined, undefined, true);\n  m.isTemp = true;\n  m.dbId = 0;\n  m.modelId = 0;\n  m.fragId = -1;\n  m.hide = false;\n  m.isLine = false;\n  m.isWideLine = false;\n  m.isPoint = false;\n\n  return function (fragId) {\n\n    // make sure that vertex-colors reflect the latest theming-state\n    if (this.is2d)\n    updateVertexBufferForThemingAndGhosting(this, fragId);\n\n    if (this.useThreeMesh) {\n      var mesh = this.vizmeshes[fragId];\n      if (mesh)\n      mesh.themingColor = this.db2ThemingColor[mesh.dbId];\n      return mesh;\n    } else {\n\n\n      // init temp mesh object from geometry, material etc.\n      m.geometry = this.getGeometry(fragId); // BufferGeometry\n      m.material = this.getMaterial(fragId); // THREE.ShaderMaterial\n      m.dbId = this.getDbIds(fragId);\n      m.modelId = this.modelId;\n      m.fragId = fragId;\n      m.visible = true;\n      m.isLine = this.isLine(fragId);\n      m.isWideLine = this.isWideLine(fragId);\n      m.isPoint = this.isPoint(fragId);\n      m.hide = this.isFragOff(fragId);\n      m.themingColor = this.db2ThemingColor[m.dbId];\n\n      this.getWorldMatrix(fragId, m.matrixWorld);\n\n      return m;\n    }\n  };\n\n}();\n\n\nFragmentList.prototype.getMaterialId = function (fragId) {\n  var m = this.getMaterial(fragId);\n  return m ? m.id : 0;\n};\n\nFragmentList.prototype.getMaterial = function (fragId) {\n  // material ids are either stored with vizmeshes or in the material map.\n  return this.useThreeMesh ? this.vizmeshes[fragId].material : this.materialIdMap[this.materialids[fragId]];\n};\n\nFragmentList.prototype.getGeometry = function (fragId) {\n  // geometry is either stored in with vizmoeshes or obtained from this.geoms.\n  // Make sure this.vizmesh[fragId] isn't null or undefined\n  var mesh;\n  return this.useThreeMesh ?\n  (mesh = this.vizmeshes[fragId]) ? mesh.geometry : null :\n  this.geoms.getGeometry(this.geomids[fragId]);\n};\n\nFragmentList.prototype.getGeometryId = function (fragId) {\n  // When using THREE.Meshes, fragIds and geomids are the same and this.geomids is not used.\n  return this.useThreeMesh ? fragId : this.geomids[fragId];\n};\n\nFragmentList.prototype.setMaterial = function (fragId, material) {\n\n  if (this.useThreeMesh) {\n\n    this.vizmeshes[fragId].material = material;\n\n  } else {\n\n    var matId = this.materialmap[material.id];\n\n    if (!matId) {\n\n      //Material.id is global, hence we can't expect it to be a small\n      //integer. Hence the incrementing counter indirection.\n      matId = this.nextMaterialId++;\n\n      this.materialids = reallocateUintArrayMaybe(this.materialids, matId);\n\n      this.materialIdMap[matId] = material;\n\n      //remember our local ID for this global material\n      this.materialmap[material.id] = matId;\n    }\n\n    this.materialids[fragId] = matId;\n  }\n};\n\nFragmentList.prototype.getCount = function () {\n  return this.vizmeshes ? this.vizmeshes.length : this.vizflags.length;\n};\n\nFragmentList.prototype.getDbIds = function (fragId) {\n  return this.fragments.fragId2dbId[fragId];\n};\n\n// glRenderer: instanceof WebGLRenderer (only neeeded when for this.useThreeMesh==false)\nFragmentList.prototype.dispose = function (glrenderer) {\n\n  if (this.useThreeMesh) {\n\n    // dispatch remove event to all meshes and dispose events to all BufferGeometry buffers\n    // This will trigger EventListeners added by WebGLRenderer that deallocate the geometry later.\n    // (see onGeometryDispose(..) in WebGLRenderer.js)\n    var DISPOSE_EVENT = { type: 'dispose' };\n    var REMOVED_EVENT = { type: 'removed' };\n    for (var i = 0; i < this.vizmeshes.length; i++) {\n      var m = this.vizmeshes[i];\n      if (m) {\n        m.dispatchEvent(REMOVED_EVENT);\n        m.geometry.dispatchEvent(DISPOSE_EVENT);\n      }\n    }\n  } else {\n    // Delete all geometry data immediately (see WebGLRenderer.deallocateGeometry)\n    this.geoms.dispose(glrenderer);\n  }\n};\n\n// This function should probably not be called outside VisibityManager\n// in order to maintain node visibility state.\nFragmentList.prototype.setVisibility = function (fragId, value) {\n  this.setFlagFragment(fragId, MeshFlags.MESH_VISIBLE, value);\n  this.allVisibleDirty = true;\n};\n\n\n// Note that this function switches whole meshes on/off. It cannot be used to toggle visibility of\n// single 2D objects within a single mesh. For this one, use setObject2DVisible instead.\nFragmentList.prototype.setFragOff = function (fragId, value) {\n  this.setFlagFragment(fragId, MeshFlags.MESH_HIDE, value);\n  this.allVisibleDirty = true; // [HB:] Either this should be removed or this.areAllVisible should consider MESH_HIDE\n};\n\n\nFragmentList.prototype.setAllVisibility = function (value) {\n  if (this.is2d) {\n    var frags = this.fragments;\n    if (frags && frags.dbId2fragId) {\n      for (var id in frags.dbId2fragId) {\n        this.setObject2DGhosted(parseInt(id), !value);\n      }\n    }\n  } else {\n    this.setFlagGlobal(MeshFlags.MESH_VISIBLE, value);\n  }\n\n  this.allVisible = value;\n  this.allVisibleDirty = false;\n};\n\n/**\n    * Updates animation transform of a specific fragment.\n    * Note: \n    *      - If scale/rotation/translation are all null, the call resets the whole transform, i.e., no anim transform is assigned anymore.\n    *      - Leaving some of them null means to leave them unchanged.\n    * @param {number} fragId - Fragment ID.\n    * @param {Vector3=} scale\n    * @param {Quaternion=} rotationQ\n    * @param {Vector3=} translation\n    */\nFragmentList.prototype.updateAnimTransform = function (fragId, scale, rotationQ, translation) {\n\n  var ax = this.animxforms;\n  var off;\n\n  //Allocate animation transforms on first use.\n  if (!ax) {\n    var count = this.getCount();\n    ax = this.animxforms = new Float32Array(10 * count); //3 scale + 4 rotation + 3 translation\n    for (var i = 0; i < count; i++) {\n      // get start index of the anim transform of fragment i\n      off = i * 10;\n\n      // init as identity transform\n      ax[off] = 1; // scale.x\n      ax[off + 1] = 1; // scale.y\n      ax[off + 2] = 1; // scale.z\n      ax[off + 3] = 0; // rot.x\n      ax[off + 4] = 0; // rot.y\n      ax[off + 5] = 0; // rot.z\n      ax[off + 6] = 1; // rot.w\n      ax[off + 7] = 0; // trans.x\n      ax[off + 8] = 0; // trans.y\n      ax[off + 9] = 0; // trans.z\n    }\n  }\n\n  off = fragId * 10;\n  var moved = false;\n\n  if (scale) {\n    ax[off] = scale.x;\n    ax[off + 1] = scale.y;\n    ax[off + 2] = scale.z;\n    moved = true;\n  }\n\n  if (rotationQ) {\n    ax[off + 3] = rotationQ.x;\n    ax[off + 4] = rotationQ.y;\n    ax[off + 5] = rotationQ.z;\n    ax[off + 6] = rotationQ.w;\n    moved = true;\n  }\n\n  if (translation) {\n    ax[off + 7] = translation.x;\n    ax[off + 8] = translation.y;\n    ax[off + 9] = translation.z;\n    moved = true;\n  }\n\n  // Set MESH_MOVED if an animation transform has been assigned. Just if scale/rotation/translation are all null, unset the flag.\n  this.setFlagFragment(fragId, MeshFlags.MESH_MOVED, moved);\n\n  //Assume that if we are called with null everything the caller wants to reset the transform.\n  if (!moved) {\n    // reset to identity transform\n    ax[off] = 1;\n    ax[off + 1] = 1;\n    ax[off + 2] = 1;\n    ax[off + 3] = 0;\n    ax[off + 4] = 0;\n    ax[off + 5] = 0;\n    ax[off + 6] = 1;\n    ax[off + 7] = 0;\n    ax[off + 8] = 0;\n    ax[off + 9] = 0;\n  }\n};\n\n/**\n    * Returns animation transform of a specific fragment.\n    * @param {number} fragId - Fragment ID.\n    * @param {THREE.Vector3=} scale - Output param.\n    * @param {THREE.Quaternion=} rotationQ - Output param.\n    * @param {THREE.Vector3=} translation - Output param.\n    * @returns {bool} True if an anim transform is assigned to the given fragment.\n    *      If so, it is written to the given out params. False otherwise (outparams not changed).\n    */\nFragmentList.prototype.getAnimTransform = function (fragId, scale, rotationQ, translation) {\n\n  if (!this.animxforms)\n  return false;\n\n  if (!this.isFlagSet(fragId, MeshFlags.MESH_MOVED))\n  return false;\n\n  var off = fragId * 10;\n  var ax = this.animxforms;\n\n  if (scale) {\n    scale.x = ax[off];\n    scale.y = ax[off + 1];\n    scale.z = ax[off + 2];\n  }\n\n  if (rotationQ) {\n    rotationQ.x = ax[off + 3];\n    rotationQ.y = ax[off + 4];\n    rotationQ.z = ax[off + 5];\n    rotationQ.w = ax[off + 6];\n  }\n\n  if (translation) {\n    translation.x = ax[off + 7];\n    translation.y = ax[off + 8];\n    translation.z = ax[off + 9];\n  }\n\n  return true;\n};\n\n/**\n    * Returns world matrix of a fragment.\n    * @param {number} index - Fragment ID.\n    * @param {THREE.Matrix4} dstMtx - Out param to receive the matrix.\n    */\nFragmentList.prototype.getOriginalWorldMatrix = function (index, dstMtx) {\n  var i = index * 12;\n\n  var cur = dstMtx.elements;\n  var orig = this.transforms;\n\n  if (orig) {\n    // If this.transforms is defined, copy transform from this array            \n\n    // In this.transforms, we only store the upper 3 rows explicitly. \n    // The last row is alway (0,0,0,1).\n    cur[0] = orig[i];\n    cur[1] = orig[i + 1];\n    cur[2] = orig[i + 2];\n    cur[3] = 0;\n    cur[4] = orig[i + 3];\n    cur[5] = orig[i + 4];\n    cur[6] = orig[i + 5];\n    cur[7] = 0;\n    cur[8] = orig[i + 6];\n    cur[9] = orig[i + 7];\n    cur[10] = orig[i + 8];\n    cur[11] = 0;\n    cur[12] = orig[i + 9];\n    cur[13] = orig[i + 10];\n    cur[14] = orig[i + 11];\n    cur[15] = 1;\n  } else if (this.useThreeMesh) {\n    // get matrix directly from THREE.Mesh\n    var m = this.vizmeshes[index];\n    if (m)\n    dstMtx.copy(m.matrix); // Was matrixWorld, but that is now being used for the alignment transform\n    else\n      dstMtx.identity();\n  } else {\n    dstMtx.identity();\n  }\n};\n\n\n/**\n    * Writes the final world matrix of a fragment to out param dstMtx.\n    * The world matrix results from original transform and anim transform (if any).\n    * @param {number} index - Fragment ID.\n    * @param {THREE.Matrix4} dstMtx - Out param to receive the matrix.\n    */\nFragmentList.prototype.getWorldMatrix = function () {\n\n  //Allocate a second temp variable here because the input can be the class scoped\n  //temporary matrix in some call sequences.\n  var tmp = new THREE.Matrix4();\n\n  return function (index, dstMtx) {\n\n    this.getOriginalWorldMatrix(index, dstMtx);\n\n    //If mesh hasn't moved from its original location, just use that.\n    if (this.isFlagSet(index, MeshFlags.MESH_MOVED)) {\n\n      //Otherwise construct the overall world matrix\n      this.getAnimTransform(index, _tmpScale, _tmpRot, _tmpPos);\n\n      // compose matrix from pos, rotation, and scale\n      tmp.compose(_tmpPos, _tmpRot, _tmpScale);\n\n      // First apply original matrix (in dstMtx), then anim matrix (in tmp).\n      // Note that tmp muist be multipled from left for this.\n      dstMtx.multiplyMatrices(tmp, dstMtx);\n    }\n\n    // Apply optional model-transform\n    if (this.matrix) {\n      // Apply fragment matrix first (=dst), then model matrix (=this.matrix).\n      // Note that model matrix must be multipled from left for this.\n      dstMtx.multiplyMatrices(this.matrix, dstMtx);\n    }\n  };\n}();\n\nFragmentList.prototype.setModelMatrix = function (matrix) {var _this = this;\n  if (matrix) {\n    this.matrix = this.matrix || new THREE.Matrix4();\n    this.matrix.copy(matrix);\n    if (this.useThreeMesh) {\n      // For ThreeJS meshes we use matrixWorld to store the alignment matrix\n      this.vizmeshes.forEach(function (mesh) {\n        mesh.matrixWorld.multiplyMatrices(_this.matrix, mesh.matrix);\n      });\n    }\n  } else {\n    this.matrix = null;\n    if (this.useThreeMesh) {\n      this.vizmeshes.forEach(function (mesh) {\n        mesh.matrixWorld.copy(mesh.matrix);\n      });\n    }\n  }\n  this.invMatrix = null;\n};\n\nFragmentList.prototype.getInverseModelMatrix = function () {\n  if (this.matrix) {\n    if (!this.invMatrix) {\n      this.invMatrix = new THREE.Matrix4().getInverse(this.matrix);\n    }\n\n    return this.invMatrix;\n  }\n\n  return null;\n};\n\n/**\n    * Writes the world box to dstBox outparams, considering matrix and anim transform (if specified).\n    * @param {number} index - Fragment ID.\n    * @param {THREE.Box3|LmvBox3} dstBox - result is saved here\n    */\nFragmentList.prototype.getWorldBounds = function (index, dstBox) {\n\n  //Check if the world transform of the mesh is unchanged from\n  //the original LMV file -- in such case we can use the original\n  //bounding box from the LMV package, which is presumably more precise (tighter)\n  //than just transforming the model box.\n  //This is important if we want to keep our bounding volume hierarchy efficient.\n  if (this.boxes && !this.isFlagSet(index, MeshFlags.MESH_MOVED)) {\n    var b = this.boxes;\n    var boffset = index * 6;\n    dstBox.min.x = b[boffset];\n    dstBox.min.y = b[boffset + 1];\n    dstBox.min.z = b[boffset + 2];\n    dstBox.max.x = b[boffset + 3];\n    dstBox.max.y = b[boffset + 4];\n    dstBox.max.z = b[boffset + 5];\n\n    // Consider optional model matrix if there is one\n    if (this.matrix) {\n      dstBox.applyMatrix4(this.matrix);\n    }\n\n    return;\n  }\n\n  // get original model box\n  if (this.useThreeMesh) {\n    // either from THREE.Mesh\n    var m = this.vizmeshes[index];\n    if (m && m.geometry) {\n      dstBox.copy(m.geometry.boundingBox);\n    }\n  } else\n  {\n    // or from GeometryList\n    this.geoms.getModelBox(this.geomids[index], dstBox);\n  }\n\n  if (!dstBox.empty()) {\n    // apply world matrix to dstBox.\n    // Note that the worldMatrix includes the model matrix as well.\n    this.getWorldMatrix(index, _tmpMatrix);\n    dstBox.applyMatrix4(_tmpMatrix);\n  }\n};\n\n\n/**\n    * Writes the original (as loaded) world box to dstBox outparams. Does not take into account changes\n    * to object position like explode/animation or model matrix.\n    * @param {number} index - Fragment ID.\n    * @param {Array} dstBox - Array where result is stored as 6 consecutive numbers\n    */\nFragmentList.prototype.getOriginalWorldBounds = function (index, dstBox) {\n\n  if (this.boxes) {\n    var b = this.boxes;\n    var boffset = index * 6;\n    dstBox[0] = b[boffset];\n    dstBox[1] = b[boffset + 1];\n    dstBox[2] = b[boffset + 2];\n    dstBox[3] = b[boffset + 3];\n    dstBox[4] = b[boffset + 4];\n    dstBox[5] = b[boffset + 5];\n    return;\n  }\n\n  // get original model box\n  if (this.useThreeMesh) {\n    // either from THREE.Mesh\n    var m = this.vizmeshes[index];\n    if (m && m.geometry) {\n      _tmpBox.copy(m.geometry.boundingBox);\n    }\n  } else\n  {\n    // or from GeometryList\n    this.geoms.getModelBox(this.geomids[index], _tmpBox);\n  }\n\n  if (!_tmpBox.empty()) {\n    // apply world matrix to dstBox\n    this.getOriginalWorldMatrix(index, _tmpMatrix);\n    _tmpBox.applyMatrix4(_tmpMatrix);\n  }\n\n  dstBox[0] = _tmpBox.min.x;\n  dstBox[1] = _tmpBox.min.y;\n  dstBox[2] = _tmpBox.min.z;\n  dstBox[3] = _tmpBox.max.x;\n  dstBox[4] = _tmpBox.max.y;\n  dstBox[5] = _tmpBox.max.z;\n};\n\n\n// set themingNeedsUpdate flag for all vizmeshes that contain a given dbId\nfunction setThemingOrGhostingNeedsUpdateFlag(fragList, dbId) {\n\n  if (!fragList.is2d) {\n    // In this case (3D model), we just have theming colors per mesh and don't need to update vertex buffers.\n    return;\n  }\n\n  // get id(s) of affected mesh(es) that needs a vertex-color update\n  var fragIds = fragList.fragments.dbId2fragId[dbId];\n\n  //  trigger update for single id or an array of ids\n  if (Array.isArray(fragIds)) {\n    for (var i = 0; i < fragIds.length; i++) {\n      fragList.themingOrGhostingNeedsUpdate[fragIds[i]] = true;\n    }\n  } else if (typeof fragIds === 'number') {\n    fragList.themingOrGhostingNeedsUpdate[fragIds] = true;\n  }\n}\n\n/**\n   * Applies a theming color that is blended with the final fragment color of a material shader.\n   * @param {number}        dbId\n   * @param {THREE.Vector4} [color] - theming color (in xyz) and intensity (in w). All components in [0,1].\n   *                                  Set to undefined for 'no theming'\n   */\nFragmentList.prototype.setThemingColor = function (dbId, color) {\n  // Stop if color keeps the same\n  var oldColor = this.db2ThemingColor[dbId];\n  var colorsEqual = oldColor === color || oldColor && color && oldColor.equals(color);\n  if (!colorsEqual) {\n    this.db2ThemingColor[dbId] = color || undefined;\n    setThemingOrGhostingNeedsUpdateFlag(this, dbId);\n  }\n};\n\n/** Restore original colors for all themed shapes. */\nFragmentList.prototype.clearThemingColors = function () {\n\n  // When using F2D (model.is2d()==true), we have to update the restore the original\n  // per-vertex colors. For 3D, we can use per-shape colors, so that this step is not\n  // needed.\n  if (this.is2d) {\n    // trigger update for all meshes that were affected by theming before\n    // Note that dbId2fragId only exists for F2D models.\n    for (var id in this.fragments.dbId2fragId) {\n      setThemingOrGhostingNeedsUpdateFlag(this, parseInt(id));\n    }\n    delete this.db2ThemingColor['-1']; // Delete theming for sheet\n  }\n\n  // clear theming-color map\n  this.db2ThemingColor.length = 0;\n};\n\n/** Set ghosting flag for a 2D object. This reduces the objects opacity, blends it with pageColor, and excludes it from selection.\n    *  @param {number} dbId\n    *  @param {bool}   state\n    */\nFragmentList.prototype.setObject2DGhosted = function (dbId, state) {\n  var oldState = this.dbIdIsGhosted[dbId];\n  if (!!state !== !!oldState) {\n    this.dbIdIsGhosted[dbId] = state;\n    setThemingOrGhostingNeedsUpdateFlag(this, dbId);\n  }\n};\n\n/** Set an opacity value for a 2D object.\n    *  @param {number} dbId\n    *  @param {number}  opacity\n    */\nFragmentList.prototype.setObject2DOpacity = function (dbId, opacity) {\n  var oldOpacity = this.dbIdOpacity[dbId];\n  if (opacity !== oldOpacity) {\n    this.dbIdOpacity[dbId] = opacity;\n    setThemingOrGhostingNeedsUpdateFlag(this, dbId);\n  }\n};\n\n/** Set hide flag for a 2D object. This sets opacity to 0.0, which also excludes it from selection.\n    *  @param {number} dbId\n    *  @param {bool}   visible\n    */\nFragmentList.prototype.setObject2DVisible = function (dbId, visible) {\n  var wasVisible = this.dbIdOpacity[dbId] !== 0;\n  if (visible !== wasVisible) {\n    this.dbIdOpacity[dbId] = visible | 0;\n    setThemingOrGhostingNeedsUpdateFlag(this, dbId);\n  }\n};\n\n/**\n    * Convenience class encapsulating a single fragment in a given FragmentList.\n    * Use sparingly, as it is expensive to have those for every fragment in memory.\n    * \n    * @see Autodesk.Viewing.Viewer3D#getFragmentPointer\n    * @see Autodesk.Viewing.Viewer3D#getModel\n    * \n    * @example\n    * var avp = Autodesk.Viewing.Private;\n    * var fragPointer = new avp.FragmentPointer(viewer.model.getFragmentList(), 4); // Get the fragment proxy for some frag id\n    * // The Model class also exposes the following method to get the FragmentPointer:\n    * // var fragPointer = viewer.model.getFragmentPointer(4); \n    * \n    * @constructor\n    * \n    * @param {Autodesk.Viewing.Private.FragmentList} frags - the fragment list\n    * @param {number} fragId - the fragment id\n    * \n    * @alias Autodesk.Viewing.Private.FragmentPointer\n    */\nexport function FragmentPointer(frags, fragId) {\n\n  this.frags = frags; // fragment list\n  this.fragId = fragId; // id of a fragment in frags\n\n  // used by MeshAnimation\n  this.scale = null;\n  this.quaternion = null;\n  this.position = null;\n}\n\n/**\n   * Writes the final world matrix of a fragment to dst.\n   * The world matrix results from original transform and anim transform (if any).\n   * @param {THREE.Matrix4} dst - Out param to receive the matrix.\n   * @example\n   * var matrix = new THREE.Matrix4() // Create an empty Matrix4\n   * fragPointer.getWorldMatrix(matrix); // Set the new values to the matrix variable\n   */\nFragmentPointer.prototype.getWorldMatrix = function (dst) {\n  this.frags.getWorldMatrix(this.fragId, dst);\n};\n\n/**\n    * Writes the original world matrix of a fragment to dst.\n    * @param {THREE.Matrix4} dst - Out param to receive the matrix.\n    * @example\n    * var matrix = new THREE.Matrix4() // Create an empty Matrix4\n    * fragPointer.getOriginalWorldMatrix(matrix); // Set the new values to the matrix variable\n    */\nFragmentPointer.prototype.getOriginalWorldMatrix = function (dst) {\n  this.frags.getOriginalWorldMatrix(this.fragId, dst);\n};\n\n/**\n    * Writes the world box to dst param, considering matrix and anim transform (if specified).\n    * @param {THREE.Box3|LmvBox3} dst - result is saved here\n    * @example\n    * var box = new THREE.Box3(); // Create an empty Box3\n    * fragPointer.getWorldBounds(box); // Set the new values to the box variable\n    * \n    */\nFragmentPointer.prototype.getWorldBounds = function (dst) {\n  return this.frags.getWorldBounds(this.fragId, dst);\n\n};\n\n/**\n    * Sets the scale, quaternion and position to the animation transform of the the fragment.\n    * @returns {boolean} True if an animation transform is set. Otherwise, it returns false and transform is set to identity.\n    */\nFragmentPointer.prototype.getAnimTransform = function () {\n\n  if (!this.scale) {\n    this.scale = new THREE.Vector3(1, 1, 1);\n    this.quaternion = new THREE.Quaternion(0, 0, 0, 1);\n    this.position = new THREE.Vector3(0, 0, 0);\n  }\n\n  return this.frags.getAnimTransform(this.fragId, this.scale, this.quaternion, this.position);\n\n};\n\n/**\n    * Applies current scale/quaternion/position to the fragment.\n    */\nFragmentPointer.prototype.updateAnimTransform = function () {\n\n  if (!this.scale) {\n    this.scale = new THREE.Vector3(1, 1, 1);\n    this.quaternion = new THREE.Quaternion(0, 0, 0, 1);\n    this.position = new THREE.Vector3(0, 0, 0);\n  }\n\n  this.frags.updateAnimTransform(this.fragId, this.scale, this.quaternion, this.position);\n};\n\n/**\n    * Returns the material associated with the fragment\n    * @returns {THREE.Material} - Material\n    */\nFragmentPointer.prototype.getMaterial = function () {\n  return this.frags.getMaterial(this.fragId);\n\n};\n\n/**\n    * Set a material to the current fragment\n    * @example\n    * var material = new THREE.MeshBasicMaterial({ color: 0xff0000 }); // Create a new material\n    * fragPointer.setMaterial(material); // Assign the new material to the fragment\n    */\nFragmentPointer.prototype.setMaterial = function (material) {\n\n  return this.frags.setMaterial(this.fragId, material);\n\n};","import * as THREE from 'three';\n\n// Rearranged logically, base 3. X is 1's digit, Y is 10's digit, Z is 100's digit.\n// low/medium/high value is 0/1/2. So the center of the 3x3x3 space is == 111 base 3 == 13.\n// old 64-position code, which is what the comment indices are based on\n// var pos = ((this.eye.x < box.min.x) ?  1 : 0)   // 1 = left\n//         + ((this.eye.x > box.max.x) ?  2 : 0)   // 2 = right\n//         + ((this.eye.y < box.min.y) ?  4 : 0)   // 4 = bottom\n//         + ((this.eye.y > box.max.y) ?  8 : 0)   // 8 = top\n//         + ((this.eye.z < box.min.z) ? 16 : 0)   // 16 = front\n//         + ((this.eye.z > box.max.z) ? 32 : 0);  // 32 = back\nvar _boxIndexList = // [27][7]\n[\n[1, 5, 4, 7, 3, 2, 6], //21 front, bottom, left\n[0, 3, 2, 1, 5, 4, 6], //20 front, bottom\n[0, 3, 2, 6, 5, 4, 6], //22 front, bottom, right\n[0, 4, 7, 3, 2, 1, 6], //17 front, left\n[0, 3, 2, 1, -1, -1, 4], //16 front\n[0, 3, 2, 6, 5, 1, 6], //18 front, right\n[0, 4, 7, 6, 2, 1, 6], //25 front, top, left\n[0, 3, 7, 6, 2, 1, 6], //24 front, top\n[0, 3, 7, 6, 5, 1, 6], //26 front, top, right\n[0, 1, 5, 4, 7, 3, 6], // 5 bottom, left\n[0, 1, 5, 4, -1, -1, 4], // 4 bottom\n[0, 1, 2, 6, 5, 4, 6], // 6 bottom, right\n[0, 4, 7, 3, -1, -1, 4], // 1 left\n[-1, -1, -1, -1, -1, -1, 0], // 0 inside\n[1, 2, 6, 5, -1, -1, 4], // 2 right\n[0, 4, 7, 6, 2, 3, 6], // 9 top, left \n[2, 3, 7, 6, -1, -1, 4], // 8 top\n[1, 2, 3, 7, 6, 5, 6], //10 top, right\n[0, 1, 5, 6, 7, 3, 6], //37 back, bottom, left\n[0, 1, 5, 6, 7, 4, 6], //36 back, bottom\n[0, 1, 2, 6, 7, 4, 6], //38 back, bottom, right\n[0, 4, 5, 6, 7, 3, 6], //33 back, left\n[4, 5, 6, 7, -1, -1, 4], //32 back\n[1, 2, 6, 7, 4, 5, 6], //34 back, right\n[0, 4, 5, 6, 2, 3, 6], //41 back, top, left\n[2, 3, 7, 4, 5, 6, 6], //40 back, top\n[1, 2, 3, 7, 4, 5, 6] //42 back, top, right\n];\n\n//Encapsulates frustum-box intersection logic\nexport function FrustumIntersector() {\n  this.frustum = new THREE.Frustum();\n  this.viewProj = new THREE.Matrix4();\n  this.viewDir = [0, 0, 1];\n  this.ar = 1.0;\n  this.viewport = new THREE.Vector3(1, 1, 1);\n  this.areaConv = 1;\n  this.areaCullThreshold = 1; // The pixel size of the object projected on screen, will be culled if less than this value.\n  this.eye = new THREE.Vector3();\n  this.perspective = false; // assume orthographic camera to match viewProj\n}\n\nexport var OUTSIDE = 0;\nexport var INTERSECTS = 1;\nexport var CONTAINS = 2;\nexport var CONTAINMENT_UNKNOWN = -1;\nFrustumIntersector.OUTSIDE = OUTSIDE;\nFrustumIntersector.INTERSECTS = INTERSECTS;\nFrustumIntersector.CONTAINS = CONTAINS;\nFrustumIntersector.CONTAINMENT_UNKNOWN = CONTAINMENT_UNKNOWN;\n\n// @param {THREE.Vector4[]} [cutPlanes]\nFrustumIntersector.prototype.reset = function (camera, cutPlanes) {\n  this.viewProj.multiplyMatrices(camera.projectionMatrix, camera.matrixWorldInverse);\n  this.perspective = camera.isPerspective;\n  this.frustum.setFromMatrix(this.viewProj);\n  var vm = camera.matrixWorldInverse.elements;\n  this.ar = camera.aspect;\n  this.viewDir[0] = -vm[2];\n  this.viewDir[1] = -vm[6];\n  this.viewDir[2] = -vm[10];\n  this.eye.x = camera.position.x;\n  this.eye.y = camera.position.y;\n  this.eye.z = camera.position.z;\n  this.areaConv = camera.clientWidth * camera.clientHeight / 4;\n  this.cutPlanes = cutPlanes;\n};\n\nFrustumIntersector.prototype.projectedArea = function () {\n\n  var points = [\n  new THREE.Vector3(),\n  new THREE.Vector3(),\n  new THREE.Vector3(),\n  new THREE.Vector3(),\n  new THREE.Vector3(),\n  new THREE.Vector3(),\n  new THREE.Vector3(),\n  new THREE.Vector3()];\n\n  var tmpBox = new THREE.Box2();\n\n  function applyProjection(p, m) {\n\n    var x = p.x,y = p.y,z = p.z;\n    var e = m.elements;\n\n    var w = e[3] * x + e[7] * y + e[11] * z + e[15];\n\n    //This is the difference between this function and\n    //the normal THREE.Vector3.applyProjection. We avoid\n    //inverting the positions of points behind the camera,\n    //otherwise our screen area computation can result in\n    //boxes getting clipped out when they are in fact partially visible.\n    if (w < 0)\n    w = -w;\n\n    var d = 1.0 / w;\n\n    p.x = (e[0] * x + e[4] * y + e[8] * z + e[12]) * d;\n    p.y = (e[1] * x + e[5] * y + e[9] * z + e[13]) * d;\n\n    //We also don't need the Z\n    //p.z = ( e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z + e[ 14 ] ) * d;\n  }\n\n  return function (box) {\n\n    if (box.empty())\n    return 0;\n\n    var matrix = this.viewProj;\n\n    // NOTE: I am using a binary pattern to specify all 2^3 combinations below\n    points[0].set(box.min.x, box.min.y, box.min.z); // 000\n    points[1].set(box.min.x, box.min.y, box.max.z); // 001\n    points[2].set(box.min.x, box.max.y, box.min.z); // 010\n    points[3].set(box.min.x, box.max.y, box.max.z); // 011\n    points[4].set(box.max.x, box.min.y, box.min.z); // 100\n    points[5].set(box.max.x, box.min.y, box.max.z); // 101\n    points[6].set(box.max.x, box.max.y, box.min.z); // 110\n    points[7].set(box.max.x, box.max.y, box.max.z); // 111\n\n    for (var i = 0; i < 8; i++) {\n      applyProjection(points[i], matrix);}\n\n    tmpBox.makeEmpty();\n    tmpBox.setFromPoints(points);\n\n    // Clamp both min and max value between [-1.0, 1.0]\n    if (tmpBox.min.x < -1.0)\n    tmpBox.min.x = -1.0;\n    if (tmpBox.min.x > 1.0)\n    tmpBox.min.x = 1.0;\n    if (tmpBox.min.y < -1.0)\n    tmpBox.min.y = -1.0;\n    if (tmpBox.min.y > 1.0)\n    tmpBox.min.y = 1.0;\n\n    if (tmpBox.max.x > 1.0)\n    tmpBox.max.x = 1.0;\n    if (tmpBox.max.x < -1.0)\n    tmpBox.max.x = -1.0;\n    if (tmpBox.max.y > 1.0)\n    tmpBox.max.y = 1.0;\n    if (tmpBox.max.y < -1.0)\n    tmpBox.max.y = -1.0;\n\n    return (tmpBox.max.x - tmpBox.min.x) * (tmpBox.max.y - tmpBox.min.y);\n  };\n\n}();\n\n// A more precise estimator, based on https://github.com/erich666/jgt-code/blob/master/Volume_04/Number_2/Schmalstieg1999/bboxarea.cxx\n// Schmalstieg, Dieter, and Robert F. Tobler, \"Fast Projected Area Computation for Three-Dimensional Bounding Boxes,\" journal of graphics tools, 4(2):37-43, 1999.\n// Note: this code assumes that the silhouette corners will all project to be in front of the viewer. We do Take\n// corrective action if this is not the case, but it's of a \"well, negate the value\" nature, not a true clip fix.\n// It is assumed that frustum culling has already been applied, so that such cases should be rare.\n// So, for example, a long terrain tile below the viewer may get the corners behind the viewer transformed to be some\n// semi-arbitrary corner locations in front. ProjectedArea has the same problem. Since this method is used just to get\n// a rough idea of the importance of a fragment, we don't spend a lot of time on fixing this. If a corner is detected\n// as behind the eye, we could instead return an area of 4, i.e., it fills the screen.\nFrustumIntersector.prototype.projectedBoxArea = function () {\n\n  var sizeClippedPolygon;\n\n  // maximum of 6 points in silhouette, plus 4 points, one for each clip edge\n  var points = [];\n  var pointsSwap = [];\n  for (var i = 0; i < 10; i++) {\n    points.push(new THREE.Vector3());\n    pointsSwap.push(new THREE.Vector3());\n  }\n\n  // TODO: same as projectedArea - should this implementation be a derived class? How to do that in javascript?\n  function applyProjection(p, m) {\n\n    var x = p.x,y = p.y,z = p.z;\n    var e = m.elements;\n\n    var w = e[3] * x + e[7] * y + e[11] * z + e[15];\n\n    //This is the difference between this function and\n    //the normal THREE.Vector3.applyProjection. We avoid\n    //inverting the positions of points behind the camera,\n    //otherwise our screen area computation can result in\n    //boxes getting clipped out when they are in fact partially visible.\n    if (w < 0)\n    w = -w;\n\n    var d = 1.0 / w;\n\n    p.x = (e[0] * x + e[4] * y + e[8] * z + e[12]) * d;\n    p.y = (e[1] * x + e[5] * y + e[9] * z + e[13]) * d;\n\n    //We also don't need the Z\n    //p.z = ( e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z + e[ 14 ] ) * d;\n  }\n\n  // Optimized to clip against -1 to 1 NDC in X and Y.\n  // NOTE: this modifies the clipPolygon being passed in, as the\n  // code takes four passes (for each edge of the screen) and ping-pongs\n  // the data between clipPolygon (really, the \"points\" array) and pointsSwap, a temporary buffer.\n  // Doing so saves us from having to copy data or duplicate code.\n  function clip(clipPolygon, sizePolygon) {\n    var polygonSource = clipPolygon;\n    var polygonDest = pointsSwap;\n    var polygonSwap;\n    var prevPt, thisPt, prevIn, thisIn;\n    var numPt, numClip;\n    var newSizePolygon;\n\n    var testInside = function testInside(pt) {\n      switch (numClip) {\n        case 0:\n          return pt.x >= -1;\n        case 1:\n          return pt.x <= 1;\n        case 2:\n          return pt.y >= -1;\n        case 3:\n          return pt.y <= 1;}\n\n    };\n    var savePoint = function savePoint(pt) {\n      polygonDest[newSizePolygon].x = pt.x;\n      polygonDest[newSizePolygon++].y = pt.y;\n    };\n    var saveIntersect = function saveIntersect() {\n      var ptx, pty;\n      switch (numClip) {\n        case 0:\n          ptx = -1;\n          pty = prevPt.y + (thisPt.y - prevPt.y) * (ptx - prevPt.x) / (thisPt.x - prevPt.x);\n          break;\n        case 1:\n          ptx = 1;\n          pty = prevPt.y + (thisPt.y - prevPt.y) * (ptx - prevPt.x) / (thisPt.x - prevPt.x);\n          break;\n        case 2:\n          pty = -1;\n          ptx = prevPt.x + (thisPt.x - prevPt.x) * (pty - prevPt.y) / (thisPt.y - prevPt.y);\n          break;\n        case 3:\n          pty = 1;\n          ptx = prevPt.x + (thisPt.x - prevPt.x) * (pty - prevPt.y) / (thisPt.y - prevPt.y);\n          break;}\n\n      polygonDest[newSizePolygon].x = ptx;\n      polygonDest[newSizePolygon++].y = pty;\n    };\n\n    // If polygon size <= 2, it will have no area, so don't care. We need this test to avoid\n    // access polygonSource[-1] when size === 0.\n    for (numClip = 0; numClip < 4 && sizePolygon > 2; numClip++) {\n      newSizePolygon = 0;\n      prevPt = polygonSource[sizePolygon - 1];\n      prevIn = testInside(prevPt);\n      for (numPt = 0; numPt < sizePolygon; numPt++) {\n        thisPt = polygonSource[numPt];\n        thisIn = testInside(thisPt);\n        if (prevIn) {\n          if (thisIn) {\n            // edge is entirely in - save point\n            savePoint(thisPt);\n          } else {\n            // edge is exiting - save intersection\n            saveIntersect();\n          }\n        } else {\n          // edge starts out\n          if (thisIn) {\n            // edge is entering - save intersection and point\n            saveIntersect();\n            savePoint(thisPt);\n          }\n          //else {\n          // edge is still out - save nothing\n          //}\n        }\n        prevPt = thisPt;\n        prevIn = thisIn;\n      }\n\n      // swap for next round\n      sizePolygon = newSizePolygon;\n      polygonSwap = polygonSource;\n      polygonSource = polygonDest;\n      polygonDest = polygonSwap;\n    }\n    sizeClippedPolygon = sizePolygon;\n    return polygonSource;\n  }\n\n  // if not specified, perform clip\n  return function (box, doNotClip) {\n\n    if (box.empty())\n    return 0;\n\n    var matrix = this.viewProj;\n\n    //compute the array index to classify eye with respect to the 6 defining planes\n    //of the bbox, 0-26\n    var pos;\n    if (this.perspective) {\n      if (this.eye.x >= box.min.x) {\n        pos = this.eye.x > box.max.x ? 2 : 1;\n      } else {\n        pos = 0;\n      }\n      if (this.eye.y >= box.min.y) {\n        pos += this.eye.y > box.max.y ? 6 : 3;\n      }\n      if (this.eye.z >= box.min.z) {\n        pos += this.eye.z > box.max.z ? 18 : 9;\n      }\n    } else {\n      if (this.viewDir[0] <= 0) {\n        pos = this.viewDir[0] < 0 ? 2 : 1;\n      } else {\n        pos = 0;\n      }\n      if (this.viewDir[1] <= 0) {\n        pos += this.viewDir[1] < 0 ? 6 : 3;\n      }\n      if (this.viewDir[2] <= 0) {\n        pos += this.viewDir[2] < 0 ? 18 : 9;\n      }\n    }\n\n    // 13 indicates eye location is inside box, index 1+3+9, so return full screen area\n    if (pos === 13) {\n      return 4;\n    }\n    var num = _boxIndexList[pos][6]; //look up number of vertices in outline\n\n    //generate 8 corners of the bbox, as needed\n    // run through \"num\" points and create and transform just those\n    var i;\n    for (i = 0; i < num; i++) {\n      var idx = _boxIndexList[pos][i];\n      // tricksiness here: order is (though this is left-handed; we use right-handed)\n      // (min[0],min[1],min[2]); //     7+------+6\n      // (max[0],min[1],min[2]); //     /|     /|\n      // (max[0],max[1],min[2]); //    / |    / |\n      // (min[0],max[1],min[2]); //   / 4+---/--+5\n      // (min[0],min[1],max[2]); // 3+------+2 /    y   z\n      // (max[0],min[1],max[2]); //  | /    | /     |  /\n      // (max[0],max[1],max[2]); //  |/     |/      |/\n      // (min[0],max[1],max[2]); // 0+------+1      *---x\n\n      points[i].set(\n      (idx + 1) % 4 < 2 ? box.min.x : box.max.x,\n      idx % 4 < 2 ? box.min.y : box.max.y,\n      idx < 4 ? box.min.z : box.max.z);\n\n      applyProjection(points[i], matrix);\n    }\n\n    var sum = 0;\n    // always clip if needed; TODO: make more efficient, i.e., don't alloc each time.\n    if (doNotClip) {\n      sum = (points[num - 1].x - points[0].x) * (points[num - 1].y + points[0].y);\n      for (i = 0; i < num - 1; i++) {\n        sum += (points[i].x - points[i + 1].x) * (points[i].y + points[i + 1].y);}\n    } else {\n      var clippedPolygon = clip(points, num);\n      // see if clipped polygon has anything returned at all; if not, area is 0\n      if (sizeClippedPolygon >= 3) {\n        sum = (clippedPolygon[sizeClippedPolygon - 1].x - clippedPolygon[0].x) * (clippedPolygon[sizeClippedPolygon - 1].y + clippedPolygon[0].y);\n        for (i = 0; i < sizeClippedPolygon - 1; i++) {\n          sum += (clippedPolygon[i].x - clippedPolygon[i + 1].x) * (clippedPolygon[i].y + clippedPolygon[i + 1].y);}\n      }\n    }\n\n    // avoid winding order left-handed/right-handed headaches by taking abs(); fixes clockwise loops\n    return Math.abs(sum * 0.5); //return computed value corrected by 0.5\n  };\n\n}();\n\nFrustumIntersector.prototype.estimateDepth = function (bbox) {\n\n  var e = this.viewProj.elements;\n\n  // Take center of box and find its distance from the eye.\n  var x = (bbox.min.x + bbox.max.x) / 2.0;\n  var y = (bbox.min.y + bbox.max.y) / 2.0;\n  var z = (bbox.min.z + bbox.max.z) / 2.0;\n\n  // not used: var w = e[3] * x + e[7] * y + e[11] * z + e[15];\n\n  var d = 1.0 / (e[3] * x + e[7] * y + e[11] * z + e[15]);\n\n  return (e[2] * x + e[6] * y + e[10] * z + e[14]) * d;\n\n};\n\nFrustumIntersector.prototype.intersectsBox = function () {\n\n  //Copied from three.js and modified to return separate\n  //value for full containment versus intersection.\n  //Return values: 0 -> outside, 1 -> intersects, 2 -> contains\n  var p1 = new THREE.Vector3();\n  var p2 = new THREE.Vector3();\n\n  return function (box) {\n\n    var planes = this.frustum.planes;\n    var contained = 0;\n\n    for (var i = 0; i < 6; i++) {\n\n      var plane = planes[i];\n\n      p1.x = plane.normal.x > 0 ? box.min.x : box.max.x;\n      p2.x = plane.normal.x > 0 ? box.max.x : box.min.x;\n      p1.y = plane.normal.y > 0 ? box.min.y : box.max.y;\n      p2.y = plane.normal.y > 0 ? box.max.y : box.min.y;\n      p1.z = plane.normal.z > 0 ? box.min.z : box.max.z;\n      p2.z = plane.normal.z > 0 ? box.max.z : box.min.z;\n\n      var d1 = plane.distanceToPoint(p1);\n      var d2 = plane.distanceToPoint(p2);\n\n      // if both outside plane, no intersection\n\n      if (d1 < 0 && d2 < 0) {\n\n        return FrustumIntersector.OUTSIDE;\n\n      }\n\n      if (d1 > 0 && d2 > 0) {\n\n        contained++;\n\n      }\n    }\n\n    return contained == 6 ? FrustumIntersector.CONTAINS : FrustumIntersector.INTERSECTS;\n  };\n\n\n}();\n\nfunction getCorner(box, i, target) {\n  target.x = i & 1 ? box.max.x : box.min.x;\n  target.y = i & 2 ? box.max.y : box.min.y;\n  target.z = i & 4 ? box.max.z : box.min.z;\n  return target;\n}\n\nfunction pointOutsideCutPlane(point, cutPlane) {\n  var dp = point.x * cutPlane.x + point.y * cutPlane.y + point.z * cutPlane.z + cutPlane.w;\n  return dp > 1e-6;\n}\n\nvar boxOutsideCutPlane = function () {\n\n  var _tmp;\n  return function (box, plane) {\n\n    if (!_tmp) _tmp = new THREE.Vector3();\n\n    // for each corner...\n    for (var i = 0; i < 8; i++) {\n      // stop if corner i is outside\n      var corner = getCorner(box, i, _tmp);\n      if (!pointOutsideCutPlane(corner, plane)) {\n        return false;\n      }\n    }\n    // all corners are in the outer half-space\n    return true;\n  };\n}();\n\n// Returns true if the given box is fully in the outer half-space of an active cut plane\nFrustumIntersector.prototype.boxOutsideCutPlanes = function (box) {\n  if (!this.cutPlanes) {\n    return false;\n  }\n\n  for (var i = 0; i < this.cutPlanes.length; i++) {\n    var plane = this.cutPlanes[i];\n    if (boxOutsideCutPlane(box, plane)) {\n      return true;\n    }\n  }\n  return false;\n};","import * as globals from '../globals';\nimport { isMobileDevice } from \"../../compat\";\nimport * as THREE from \"three\";\n\n/**\n                                 * Maintains a list of buffer geometries and running totals of their memory usage, etc.\n                                 * Each geometry gets an integer ID to be used as reference in packed fragment lists.\n                                 * @param {number} numObjects Number of objects (may be 0 if not known in advance).\n                                 * @param {boolean} is2d True for 2D datasets.\n                                 * @param {boolean} [disableStreaming] Set to true for small models to enforce full GPU upload.\n                                 * @constructor\n                                 */\nexport function GeometryList(numObjects, is2d, disableStreaming, isUnitBoxes) {\n  // array of BufferGeometry instances. Indexed by svfid.\n  this.geoms = [null]; //keep index 0 reserved for invalid id\n\n  this.numGeomsInMemory = 0; // total number of geoms added via addGeometry(..) (may be <this.geoms.length)\n  this.geomMemory = 0; // total memory in bytes of all geoms\n  this.gpuMeshMemory = 0; // total memory in bytes of all geoms, exluding those that we draw from system memory\n  this.gpuNumMeshes = 0; // total number of geoms etries that we fully upload to GPU for drawing\n  this.geomPolyCount = 0; // summed number of polygons, where geometries with mulitple instances are counted only once.\n  this.instancePolyCount = 0; // summed number of polygons, counted per instance\n  this.is2d = is2d;\n\n  // 6 floats per geometry\n  this.geomBoxes = isUnitBoxes ? null : new Float32Array(Math.max(1, numObjects + 1) * 6);\n  this.numObjects = numObjects;\n\n  // If false, we use a heuristic to determine which shapes are uploaded to GPU and which\n  // ones we draw from CPU memory using (slower) streaming draw.\n  this.disableStreaming = !!disableStreaming;\n}\n\nGeometryList.prototype.getGeometry = function (svfid) {\n  return this.geoms[svfid];\n};\n\n/**\n    * Determines for a geometry whether to store it on CPU or GPU.\n    * @param {THREE.BufferGeometry} geometry\n    * @param {number}               numInstances\n    * @param {number}               gpuNumMeshes\n    * @param {number}               gpuMeshMemory\n    */\nGeometryList.prototype.chooseMemoryType = function (geometry, numInstances, gpuNumMeshes, gpuMeshMemory) {\n  // Define GPU memory limits for heuristics below\n  var GPU_MEMORY_LOW = globals.GPU_MEMORY_LIMIT;\n  var GPU_MEMORY_HIGH = 2 * GPU_MEMORY_LOW;\n  var GPU_MESH_MAX = globals.GPU_OBJECT_LIMIT;\n\n  if (GPU_MEMORY_LOW === 0) {\n    geometry.streamingDraw = true;\n    geometry.streamingIndex = true;\n    return;\n  }\n\n  //Heuristically determine if we want to load this mesh onto the GPU\n  //or use streaming draw from system memory\n  if (this.disableStreaming || gpuMeshMemory < GPU_MEMORY_LOW && gpuNumMeshes < GPU_MESH_MAX) {\n    //We are below the lower limits, so the mesh automatically is\n    //assigned to retained mode\n    geometry.streamingDraw = false;\n    geometry.streamingIndex = false;\n  } else if (gpuMeshMemory >= GPU_MEMORY_HIGH) {\n    //We are above the upper limit, so mesh is automatically\n    //assigned to streaming draw\n    geometry.streamingDraw = true;\n    geometry.streamingIndex = true;\n  } else {\n    //Between the lower and upper limits,\n    //Score mesh importance based on its size\n    //and number of instances it has. If the score\n    //is high, we will prefer to put the mesh on the GPU\n    //so that we don't schlep it across the bus all the time.\n    var weightScore;\n\n    if (!this.is2d) {\n      weightScore = geometry.byteSize * (numInstances || 1);\n    } else {\n      //In the case of 2D, there are no instances, so we just keep\n      //piling into the GPU until we reach the \"high\" mark.\n      weightScore = 100001;\n    }\n\n    if (weightScore < 100000) {\n      geometry.streamingDraw = true;\n      geometry.streamingIndex = true;\n    }\n  }\n};\n\n/**\n    * Stores geometry in this.geoms, updates overall GPU/CPU statistics (this.geometry etc.),\n    * changes the geometry object:\n    *      - Sets geometry.streamingDraw/streamingIndex (to control whether to draw the mesh from system mem or GPU)\n    *      - Sets geometry.svfid, so that each geom knows its index.\n    *      - Deletes the bbox and bsphere to safe memory\n    * Assumptions:\n    *      - It is not expected to be called multiple times for the same svfid. This would mess up some statistics.\n    * @param {LmvBufferGeometry} geometry - Must not be null. A geometry cannot be added\n    *      to more than one GeometryList. (see below why)\n    * @param {number} numInstances - default 1 if undef.\n    * @param {number} svfid - Geometry will be stored in this.geoms[svfid].\n    *      If undef or <=0, geometry is appended at the end of this.geoms.\n    */\nGeometryList.prototype.addGeometry = function (geometry, numInstances, svfid) {\n  this.chooseMemoryType(geometry, numInstances, this.gpuNumMeshes, this.gpuMeshMemory);\n\n  // track overall GPU workload\n  var size = geometry.byteSize + globals.GEOMETRY_OVERHEAD;\n  if (!geometry.streamingDraw) {\n    if (isMobileDevice())\n    size += geometry.byteSize;\n    this.gpuMeshMemory += geometry.byteSize;\n    this.gpuNumMeshes += 1;\n  }\n\n  this.numGeomsInMemory++;\n\n  // if no svfid is defined\n  if (svfid === undefined || svfid <= 0)\n  svfid = this.geoms.length;\n\n  // store geometry (may increase array length)\n  this.geoms[svfid] = geometry;\n\n  if (this.geomBoxes) {\n    // resize this.geombboxes if necessary\n    var fill = this.geomBoxes.length / 6 | 0;\n    if (fill < this.geoms.length) {\n      var end = this.geoms.length * 3 / 2 | 0;\n      var nb = new Float32Array(6 * end);\n      nb.set(this.geomBoxes);\n      // Make all of the new bounds empty\n      var empty = new THREE.Box3();\n      empty.makeEmpty();\n      while (fill < end) {\n        nb[fill * 6] = empty.min.x;\n        nb[fill * 6 + 1] = empty.min.y;\n        nb[fill * 6 + 2] = empty.min.z;\n        nb[fill * 6 + 3] = empty.max.x;\n        nb[fill * 6 + 4] = empty.max.y;\n        nb[fill++ * 6 + 5] = empty.max.z;\n      }\n      this.geomBoxes = nb;\n    }\n\n    // copy geometry bbox to this.geomBoxes\n    var bb = geometry.boundingBox;\n    if (!bb) {\n      if (!geometry.hash) {\n        console.error(\"Mesh without bbox and without hash should not be.\");\n      }\n      this.geomBoxes[svfid * 6] = -0.5;\n      this.geomBoxes[svfid * 6 + 1] = -0.5;\n      this.geomBoxes[svfid * 6 + 2] = -0.5;\n      this.geomBoxes[svfid * 6 + 3] = 0.5;\n      this.geomBoxes[svfid * 6 + 4] = 0.5;\n      this.geomBoxes[svfid * 6 + 5] = 0.5;\n    } else {\n      this.geomBoxes[svfid * 6] = bb.min.x;\n      this.geomBoxes[svfid * 6 + 1] = bb.min.y;\n      this.geomBoxes[svfid * 6 + 2] = bb.min.z;\n      this.geomBoxes[svfid * 6 + 3] = bb.max.x;\n      this.geomBoxes[svfid * 6 + 4] = bb.max.y;\n      this.geomBoxes[svfid * 6 + 5] = bb.max.z;\n    }\n  }\n\n  //Free the bbx objects if we don't want them.\n  if (globals.memoryOptimizedLoading && !this.is2d) {\n    geometry.boundingBox = null;\n    geometry.boundingSphere = null;\n  }\n\n  // track system-side memory\n  this.geomMemory += size;\n\n  // track polygon count\n  //TODO: Asssignment into the svf is temporary until the dependencies\n  //are unentangled\n  var ib = geometry.attributes['index'] && geometry.attributes['index'].array || geometry.ib;\n  var perPoly = geometry.isLines ? 2 : 3;\n  var polyCount;\n  if (ib) {\n    polyCount = ib.length / perPoly;\n  } else if (geometry.vb) {\n    polyCount = geometry.vb.length / (perPoly * geometry.stride);\n  } else {\n    polyCount = geometry.attributes['position'].length / (3 * perPoly);\n  }\n  this.geomPolyCount += polyCount;\n  this.instancePolyCount += polyCount * (numInstances || 1);\n\n  // Record the count that can be decrease properly when geometry removed.\n  geometry.polyCount = polyCount;\n  geometry.instanceCount = numInstances || 1;\n\n  geometry.svfid = svfid;\n\n  return svfid;\n};\n\n/**\n    * Removes the geometry with svfid 'idx' from the list.\n    * Note: Unlike addGeometry, this method only updates this.numGeomsInMemory. All other statistics keep the same.\n    * @param {int} idx - Geometry ID.\n    * @returns {int} Size of the removed geometry, or 0.\n    */\nGeometryList.prototype.removeGeometry = function (idx, renderer) {\n  // if there is no geom assigned, just return 0\n  var geometry = this.getGeometry(idx);\n  if (!geometry) {\n    return 0;\n  }\n  var size = geometry.byteSize + globals.GEOMETRY_OVERHEAD;\n  renderer && renderer.deallocateGeometry(geometry);\n  if (!geometry.streamingDraw) {\n    if (isMobileDevice())\n    size += geometry.byteSize;\n    this.gpuMeshMemory -= geometry.byteSize;\n    this.gpuNumMeshes -= 1;\n  }\n\n  // remove geometry from the list\n  this.geoms[idx] = null;\n\n  // decrease its related counts\n  this.geomMemory -= size;\n  this.numGeomsInMemory--;\n  this.geomPolyCount -= geometry.polyCount;\n  this.instancePolyCount -= geometry.instanceCount * geometry.polyCount;\n\n  return size;\n};\n\n\n/**\n    * Returns bounding box of a geometry.\n    * @param {number} geomid - Geometry ID.\n    * @param {THREE.Box3|LmvBox3} dst - Set to empty is there is no geometry of this id.\n    */\nGeometryList.prototype.getModelBox = function (geomid, dst) {\n\n  //In case of OTG models, we do not store the geometry bounds, because\n  //they are all unit boxes.\n  if (!this.geomBoxes) {\n    // Note: Since 0 is reserved as invalid geometry-index, the geometries start at 1\n    //       and this.numObjects itself is still a valid index. Therefore <=.\n    if (geomid >= 1 && geomid <= this.numObjects) {\n      dst.min.x = -0.5;\n      dst.min.y = -0.5;\n      dst.min.z = -0.5;\n      dst.max.x = 0.5;\n      dst.max.y = 0.5;\n      dst.max.z = 0.5;\n    } else {\n      dst.makeEmpty();\n    }\n    return;\n  }\n\n  // return empty box if geomid is out of bounds. If the id is in bounds\n  // then the stored bbox is empty if the geometry hasn't been loaded \n  if (geomid === 0 || this.geomBoxes.length / 6 <= geomid) {\n    dst.makeEmpty();\n    return;\n  }\n\n  // extract bbox values from Float32Array this.geomboxes\n  var off = geomid * 6;\n  var bb = this.geomBoxes;\n  dst.min.x = bb[off];\n  dst.min.y = bb[off + 1];\n  dst.min.z = bb[off + 2];\n  dst.max.x = bb[off + 3];\n  dst.max.y = bb[off + 4];\n  dst.max.z = bb[off + 5];\n};\n\n// Tell renderer to release all GPU buffers. \n// renderer: instaneof FireFlyWebGLRenderer\nGeometryList.prototype.dispose = function (renderer) {\n  if (!renderer)\n  return;\n\n  for (var i = 0, iEnd = this.geoms.length; i < iEnd; i++) {\n    if (this.geoms[i])\n    renderer.deallocateGeometry(this.geoms[i]);\n  }\n};\n\nGeometryList.prototype.printStats = function () {\n  THREE.log(\"Total geometry size: \" + this.geomMemory / (1024 * 1024) + \" MB\");\n  THREE.log(\"Number of meshes: \" + (this.geoms.length - 1));\n  THREE.log(\"Num Meshes on GPU: \" + this.gpuNumMeshes);\n  THREE.log(\"Net GPU geom memory used: \" + this.gpuMeshMemory);\n};","\nimport { SelectionMode } from \"./SelectionMode\";\nimport { logger } from \"../../logger/Logger\";\n\nvar NODE_TYPE_ASSEMBLY = 0x0, // Real world object as assembly of sub-objects\nNODE_TYPE_INSERT = 0x1, // Insert of multiple-instanced object\nNODE_TYPE_LAYER = 0x2, // A layer (specific abstraction collection)\nNODE_TYPE_COLLECTION = 0x3, // An abstract collection of objects (e.g. “Doors”)\nNODE_TYPE_COMPOSITE = 0x4, // A real world object whose internal structure is not relevant to end user\nNODE_TYPE_MODEL = 0x5, // Root of tree representing an entire Model. An aggregate model can contain multiple nested models.\nNODE_TYPE_GEOMETRY = 0x6, // Leaf geometry node\nNODE_TYPE_BITS = 0x7, //mask for all bits used by node type\n\nNODE_FLAG_NOSELECT = 0x20000000,\nNODE_FLAG_OFF = 0x40000000,\nNODE_FLAG_HIDE = 0x80000000,\n\n// Flags defined and used in LMV\nNODE_FLAG_LOCK_VISIBLE = 0x00001000,\nNODE_FLAG_LOCK_EXPLODE = 0x00002000,\nNODE_FLAG_LOCK_SELECT = 0x00004000;\n\n/**\n                                     * \n                                     * @constructor\n                                     * @memberof Autodesk.Viewing.Private\n                                     * @alias Autodesk.Viewing.Private.InstanceTree\n                                     */\nexport function InstanceTree(nodeAccess, objectCount, maxDepth) {\n\n  this.nodeAccess = nodeAccess;\n  this.maxDepth = maxDepth;\n  this.objectCount = objectCount;\n  this.numHidden = 0;\n  this.numOff = 0;\n\n  // when not using precomputed nodeBoxes, fragments are used for on-the-fly bbox computation\n  this.fragList = null;\n}\n\n\nInstanceTree.prototype.setFlagNode = function (dbId, flag, value) {\n\n  var old = this.nodeAccess.getNodeFlags(dbId);\n\n  // \"!!\" converts to bool\n  if (!!(old & flag) == value)\n  return false;\n\n  if (value)\n  this.nodeAccess.setNodeFlags(dbId, old | flag);else\n\n  this.nodeAccess.setNodeFlags(dbId, old & ~flag);\n\n  return true;\n};\n\nInstanceTree.prototype.setFlagGlobal = function (flag, value) {\n  var na = this.nodeAccess;\n\n  var i = 0,iEnd = na.numNodes;\n  if (value) {\n    for (; i < iEnd; i++) {\n      na.setNodeFlags(i, na.getNodeFlags(i) | flag);\n    }\n  } else {\n    var notflag = ~flag;\n    for (; i < iEnd; i++) {\n      na.setNodeFlags(i, na.getNodeFlags(i) & notflag);\n    }\n  }\n};\n\n/**\n    * When a node is OFF, it is completely skipped for display purposes\n    */\nInstanceTree.prototype.setNodeOff = function (dbId, value) {\n  var res = this.setFlagNode(dbId, NODE_FLAG_OFF, value);\n  if (res) {\n    if (value)\n    this.numOff++;else\n\n    this.numOff--;\n  }\n  return res;\n};\n\nInstanceTree.prototype.isNodeOff = function (dbId) {\n  return !!(this.nodeAccess.getNodeFlags(dbId) & NODE_FLAG_OFF);\n};\n\n\n/**\n    * When a node is HIDDEN it will display in ghosted style\n    * if display of hidden objects is on\n    */\nInstanceTree.prototype.setNodeHidden = function (dbId, value) {\n  var res = this.setFlagNode(dbId, NODE_FLAG_HIDE, value);\n  if (res) {\n    if (value)\n    this.numHidden++;else\n\n    this.numHidden--;\n  }\n  return res;\n};\n\n/**\n    * Whether a node id is hidden.\n    * @param {number} dbId - The node's database id\n    * @returns {boolean} \n    * @alias Autodesk.Viewing.Private.InstanceTree#isNodeHidden\n    */\nInstanceTree.prototype.isNodeHidden = function (dbId) {\n  return !!(this.nodeAccess.getNodeFlags(dbId) & NODE_FLAG_HIDE);\n};\n\nInstanceTree.prototype.lockNodeSelection = function (dbId, value) {\n  return this.setFlagNode(dbId, NODE_FLAG_LOCK_SELECT, value);\n};\n\nInstanceTree.prototype.isNodeSelectionLocked = function (dbId) {\n  return !!(this.nodeAccess.getNodeFlags(dbId) & NODE_FLAG_LOCK_SELECT);\n};\n\n/**\n    * When a node's visibility is locked it can not be hidden\n    */\nInstanceTree.prototype.lockNodeVisible = function (dbId, value) {\n  return this.setFlagNode(dbId, NODE_FLAG_LOCK_VISIBLE, value);\n};\n\n/**\n    * Whether a node id's explode is locked.\n    * @param {number} dbId - The node's database id\n    * @returns {boolean} \n    * @alias Autodesk.Viewing.Private.InstanceTree#isNodeHidden\n    */\nInstanceTree.prototype.isNodeVisibleLocked = function (dbId) {\n  return !!(this.nodeAccess.getNodeFlags(dbId) & NODE_FLAG_LOCK_VISIBLE);\n};\n\n/**\n    * Whether a node id's visibility is locked.\n    * @param {number} dbId - The node's database id\n    * @returns {boolean} \n    * @alias Autodesk.Viewing.Private.InstanceTree#isNodeHidden\n    */\nInstanceTree.prototype.isNodeExplodeLocked = function (dbId) {\n  return !!(this.nodeAccess.getNodeFlags(dbId) & NODE_FLAG_LOCK_EXPLODE);\n};\n\n/**\n    * When a node's explode is locked it won't explode\n    */\nInstanceTree.prototype.lockNodeExplode = function (dbId, value) {\n  return this.setFlagNode(dbId, NODE_FLAG_LOCK_EXPLODE, value);\n};\n\n/**\n    * Gets the type associated with the node, such as assmebly, layer, model, geometry, etc.\n    * \n    * @param {number} dbId - The node's database id\n    * @returns {number} \n    * @alias Autodesk.Viewing.Private.InstanceTree#getNodeType\n    */\nInstanceTree.prototype.getNodeType = function (dbId) {\n  return this.nodeAccess.getNodeFlags(dbId) & NODE_TYPE_BITS;\n};\n\n/**\n    * Whether the node is a selectable entity.\n    * \n    * @param {number} dbId - The node's database id\n    * @returns {boolean} \n    * @alias Autodesk.Viewing.Private.InstanceTree#isNodeSelectable\n    */\nInstanceTree.prototype.isNodeSelectable = function (dbId) {\n  return !(this.nodeAccess.getNodeFlags(dbId) & NODE_FLAG_NOSELECT);\n};\n\n/**\n    * Gets the database id of the node's parent.\n    * \n    * @param {number} dbId - The node's database id\n    * @returns {number} \n    * @alias Autodesk.Viewing.Private.InstanceTree#getNodeParentId\n    */\nInstanceTree.prototype.getNodeParentId = function (dbId) {\n  return this.nodeAccess.getParentId(dbId);\n};\n\n/**\n    * Gets the model's root database id.\n    * \n    * @returns {number} \n    * @alias Autodesk.Viewing.Private.InstanceTree#getRootId\n    */\nInstanceTree.prototype.getRootId = function () {\n  return this.nodeAccess.rootId;\n};\n\n/**\n    * Gets the name associated to the id.\n    * \n    * @param {number} dbId - The node's database id\n    * @returns {string} \n    * @alias Autodesk.Viewing.Private.InstanceTree#getNodeName\n    */\nInstanceTree.prototype.getNodeName = function (dbId, includeCount) {\n  return this.nodeAccess.name(dbId, includeCount);\n};\n\n/**\n    * Gets get number of children under the specified id.\n    * \n    * @param {number} dbId - The node's database id\n    * @returns {number} \n    * @alias Autodesk.Viewing.Private.InstanceTree#getChildCount\n    */\nInstanceTree.prototype.getChildCount = function (dbId) {\n  return this.nodeAccess.getNumChildren(dbId);\n};\n\n\nvar _tmpArray = new Array(6);\n\n/**\n                               * Sets the bounding box values for a particular id on the 2nd argument provided.\n                               * There is no return value.\n                               * \n                               * @param {number} dbId - The node's database id\n                               * @param {Float32Array} dst - An array holding 6 number values: (min-x, min-y, min-z, max-x, max-y, max-z)\n                               * \n                               * @alias Autodesk.Viewing.Private.InstanceTree#getNodeBox\n                               */\nInstanceTree.prototype.getNodeBox = function (dbId, dst) {\n\n  // If precomputed boxes are available, just return the box directly.\n  if (this.nodeAccess.nodeBoxes) {\n    this.nodeAccess.getNodeBox(dbId, dst);\n    return;\n  }\n\n  // If fragList is available, compute nodeBox recursively from fragBoxes\n  var fl = this.fragList;\n  if (fl) {\n    dst[0] = dst[1] = dst[2] = Infinity;\n    dst[3] = dst[4] = dst[5] = -Infinity;\n    this.enumNodeFragments(dbId, function (fragId) {\n      fl.getOriginalWorldBounds(fragId, _tmpArray);\n      dst[0] = Math.min(dst[0], _tmpArray[0]);\n      dst[1] = Math.min(dst[1], _tmpArray[1]);\n      dst[2] = Math.min(dst[2], _tmpArray[2]);\n      dst[3] = Math.max(dst[3], _tmpArray[3]);\n      dst[4] = Math.max(dst[4], _tmpArray[4]);\n      dst[5] = Math.max(dst[5], _tmpArray[5]);\n    }, true);\n    return;\n  }\n\n  logger.error('getNodeBox() requires fragBoxes or nodeBoxes');\n};\n\n\nInstanceTree.prototype.getNodeIndex = function (dbId) {\n  return this.nodeAccess.getIndex(dbId);\n};\n\n/**\n    * Callback function for {@link Autodesk.Viewing.Private.InstanceTree#enumNodeFragments}\n    * @callback Autodesk.Viewing.Private.InstanceTree~onEnumNodeFragments\n    * @param {number} fragId - The fragment's id.\n    */\n\n/**\n        * \n        * @param {number} node - The id of a node.\n        * @param {Autodesk.Viewing.Private.InstanceTree~onEnumNodeFragments} callback - Function that will be called for each fragment.\n        * @param {boolean} [recursive=false] - Whether the callback function gets called for child nodes, too. \n        * \n        * @alias Autodesk.Viewing.Private.InstanceTree#enumNodeFragments\n        */\nInstanceTree.prototype.enumNodeFragments = function (node, callback, recursive) {\n\n  //TODO: Temporary until we are consistently using dbId\n  var dbId;\n  if (typeof node == \"number\")\n  dbId = node;else\n  if (node)\n  dbId = node.dbId;\n\n  var self = this;\n\n  function traverse(dbId) {\n\n    var res = self.nodeAccess.enumNodeFragments(dbId, callback);\n\n    if (res)\n    return res;\n\n    if (recursive) {\n      res = self.enumNodeChildren(dbId, function (child_dbId) {\n        return traverse(child_dbId);\n      });\n\n      if (res)\n      return res;\n    }\n  }\n\n  return traverse(dbId);\n\n};\n\n/**\n    * Callback function for {@link Autodesk.Viewing.Private.InstanceTree#enumNodeChildren}\n    * @callback Autodesk.Viewing.Private.InstanceTree~onEnumNodeChildren\n    * @param {number} dbId - A database id\n    */\n\n/**\n        * \n        * @param {number} node - The id of a node.\n        * @param {Autodesk.Viewing.Private.InstanceTree~onEnumNodeChildren} callback - Function that will be called for each child node.\n        * @param {boolean} [recursive=false] - Whether the callback function gets called for indirect child nodes, too. \n        * \n        * @alias Autodesk.Viewing.Private.InstanceTree#enumNodeChildren\n        */\nInstanceTree.prototype.enumNodeChildren = function (node, callback, recursive) {\n\n  //TODO: Temporary until we are consistently using dbId\n  var dbId;\n  if (typeof node == \"number\")\n  dbId = node;else\n  if (node)\n  dbId = node.dbId;\n\n  var self = this;\n\n  if (recursive) {\n    if (callback(dbId))\n    return dbId;\n  }\n\n  function traverse(dbId) {\n\n    var res = self.nodeAccess.enumNodeChildren(dbId, function (childId) {\n      if (callback(childId))\n      return childId;\n\n      if (recursive)\n      return traverse(childId);\n    });\n\n    if (res)\n    return res;\n  }\n\n  return traverse(dbId);\n};\n\n\n//Given a leaf node, find the correct parent\n//node to select according to the given selection mode\nInstanceTree.prototype.findNodeForSelection = function (dbId, selectionMode) {\n\n  //Default legacy mode -- select exactly the node we got asked for.\n  if (selectionMode === SelectionMode.LEAF_OBJECT)\n  return dbId;\n\n  var res = dbId;\n  var node, nt;\n\n  if (selectionMode === SelectionMode.FIRST_OBJECT) {\n    //1. Find the leaf node of the selection tree containing it and then follow the chain of parents all the way up to the root to get the complete path from root to leaf node.\n    //2. Start at the root and walk down the path until the first node that is not a Model, Layer or Collection. Select it.\n    var idpath = [];\n\n    node = dbId;\n    while (node) {\n      idpath.push(node);\n      node = this.getNodeParentId(node);\n    }\n\n    for (var i = idpath.length - 1; i >= 0; i--) {\n      nt = this.getNodeType(idpath[i]);\n      if (nt !== NODE_TYPE_MODEL &&\n      nt !== NODE_TYPE_LAYER &&\n      nt !== NODE_TYPE_COLLECTION) {\n        res = idpath[i];\n        break;\n      }\n    }\n  } else\n\n  if (selectionMode === SelectionMode.LAST_OBJECT) {\n    // Start at the leaf and walk up the path until the first node that is Composite. Select it. If there’s no Composite node in the path select the leaf.\n\n    node = dbId;\n    while (node) {\n      nt = this.getNodeType(node);\n      if (nt === NODE_TYPE_COMPOSITE) {\n        res = node;\n        break;\n      }\n      node = this.getNodeParentId(node);\n    }\n\n  }\n\n  return res;\n\n};\n\n// When not using precomputed bboxes, the fragment boxes are needed for on-the-fly computation of node boxes.\nInstanceTree.prototype.setFragmentList = function (fragList) {\n  this.fragList = fragList;\n};","function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}\nimport { utf16to8, utf8BlobToStr } from \"../../file-loaders/lmvtk/common/StringUtils\";\n\n\nexport var FlatStringStorage = /*#__PURE__*/function () {\n\n  function FlatStringStorage(initial) {_classCallCheck(this, FlatStringStorage);\n    if (initial) {\n      this.buf = initial.buf;\n      this.idx = initial.idx;\n      this.next = initial.next;\n    } else {\n      this.buf = new Uint8Array(256);\n      this.next = 0;\n      this.idx = [0];\n    }\n  }_createClass(FlatStringStorage, [{ key: \"allocate\", value: function allocate(\n\n    len) {\n      if (this.buf.length - this.next < len) {\n        var nsz = Math.max(this.buf.length * 3 / 2, this.buf.length + len);\n        var nb = new Uint8Array(nsz);\n        nb.set(this.buf);\n        this.buf = nb;\n      }\n    } }, { key: \"add\", value: function add(\n\n    s) {\n      if (s === null || typeof s === \"undefined\") {\n        return 0;\n      }\n\n      if (!s.length) {\n        this.idx.push(this.next);\n        return this.idx.length - 1;\n      }\n\n      var len = utf16to8(s, null);\n      this.allocate(len);\n      this.next += utf16to8(s, this.buf, this.next);\n      this.idx.push(this.next);\n      return this.idx.length - 1;\n    } }, { key: \"get\", value: function get(\n\n    i) {\n      if (!i) {\n        return undefined;\n      }\n\n      var start = this.idx[i - 1];\n      var end = this.idx[i];\n      if (start === end)\n      return \"\";\n      return utf8BlobToStr(this.buf, start, end - start);\n    } }, { key: \"flatten\", value: function flatten()\n\n    {\n      this.idx = arrayToBuffer(this.idx);\n      //TODO: we could also clip this.buf to the actually used size, but that requires reallocation\n    } }]);return FlatStringStorage;}();\n\n\n\n\n//\n// struct Node {\n//     int dbId;\n//     int parentDbId;\n//     int firstChild; //if negative it's a fragment list\n//     int numChildren;\n//     int flags;   \n// };\n// sizeof(Node) == 20\nvar SIZEOF_NODE = 5, //integers\nOFFSET_DBID = 0,\nOFFSET_PARENT = 1,\nOFFSET_FIRST_CHILD = 2,\nOFFSET_NUM_CHILD = 3,\nOFFSET_FLAGS = 4;\n\n// note: objectCount and fragmentCount are not used\nexport function InstanceTreeStorage(objectCount, fragmentCount) {\n\n  this.nodes = [];\n  this.nextNode = 0;\n\n  this.children = [];\n  this.nextChild = 0;\n\n  this.dbIdToIndex = {};\n\n  this.names = [];\n  this.s2i = {}; //duplicate string pool\n  this.strings = new FlatStringStorage();\n  this.nameSuffixes = []; //integers\n\n  //Occupy index zero so that we can use index 0 as undefined\n  this.getIndex(0);\n}\n\nInstanceTreeStorage.prototype.getIndex = function (dbId) {\n\n  var index = this.dbIdToIndex[dbId];\n\n  if (index)\n  return index;\n\n  index = this.nextNode++;\n\n  //Allocate space for new node\n  this.nodes.push(dbId); //store the dbId as first integer in the Node structure\n  //Add four blank integers to be filled by setNode\n  for (var i = 1; i < SIZEOF_NODE; i++) {\n    this.nodes.push(0);}\n\n  this.dbIdToIndex[dbId] = index;\n\n  return index;\n};\n\nInstanceTreeStorage.prototype.setNode = function (dbId, parentDbId, name, flags, childrenIds, fragIds) {\n\n  var index = this.getIndex(dbId);\n\n  var baseOffset = index * SIZEOF_NODE;\n\n  var numChildren = childrenIds.length;\n  var hasFragments = fragIds && fragIds.length;\n  if (hasFragments) {\n    numChildren += fragIds.length;\n  }\n\n  this.nodes[baseOffset + OFFSET_PARENT] = parentDbId;\n  this.nodes[baseOffset + OFFSET_FIRST_CHILD] = this.nextChild;\n  this.nodes[baseOffset + OFFSET_NUM_CHILD] = hasFragments ? -numChildren : numChildren;\n  this.nodes[baseOffset + OFFSET_FLAGS] = flags;\n\n  var i;\n  for (i = 0; i < childrenIds.length; i++) {\n    this.children[this.nextChild++] = this.getIndex(childrenIds[i]);}\n\n  //Store fragIds as negative numbers so we can differentiate them when looking through\n  //the array later.\n  if (hasFragments) {\n    for (i = 0; i < fragIds.length; i++) {\n      this.children[this.nextChild++] = -fragIds[i] - 1;} //index 0 stored as -1, etc., since 0 is not negative\n  }\n\n  if (this.nextChild > this.children.length) {\n    // TODO: this code may run in a worker, replace console with something else\n    console.error(\"Child index out of bounds -- should not happen\");\n  }\n\n  this.processName(index, name);\n};\n\nInstanceTreeStorage.prototype.processName = function (index, name) {\n\n  //Attempt to decompose the name into a base string + integer,\n  //like for example \"Base Wall [12345678]\" or \"Crank Shaft:1\"\n  //We will try to reduce memory usage by storing \"Base Wall\" just once.\n  var base;\n  var suffix;\n\n  //Try Revit style [1234] first\n  var iStart = -1;\n  var iEnd = -1;\n\n  if (name) {//name should not be empty, but hey, it happens.\n    iEnd = name.lastIndexOf(\"]\");\n    iStart = name.lastIndexOf(\"[\");\n\n    //Try Inventor style :1234\n    if (iStart === -1 || iEnd === -1) {\n      iStart = name.lastIndexOf(\":\");\n      iEnd = name.length;\n    }\n  }\n\n  //TODO: Any other separators? What does AutoCAD use?\n\n  if (iStart >= 0 && iEnd > iStart) {\n    base = name.slice(0, iStart + 1);\n    var ssuffix = name.slice(iStart + 1, iEnd);\n    suffix = parseInt(ssuffix, 10);\n\n    //make sure we get the same thing back when\n    //converting back to string, otherwise don't \n    //decompose it.\n    if (!suffix || suffix + \"\" !== ssuffix) {\n      base = name;\n      suffix = 0;\n    }\n  } else {\n    base = name;\n    suffix = 0;\n  }\n\n\n  var idx = this.s2i[base];\n  if (idx === undefined) {\n    idx = this.strings.add(base);\n    this.s2i[base] = idx;\n  }\n\n  this.names[index] = idx;\n  this.nameSuffixes[index] = suffix;\n};\n\n\nfunction arrayToBuffer(a) {\n  var b = new Int32Array(a.length);\n  b.set(a);\n  return b;\n}\n\n// note none of these arguments are used\nInstanceTreeStorage.prototype.flatten = function (dbId, parentDbId, name, flags, childrenIds, isLeaf) {\n  this.nodes = arrayToBuffer(this.nodes);\n  this.children = arrayToBuffer(this.children);\n  this.names = arrayToBuffer(this.names);\n  this.nameSuffixes = arrayToBuffer(this.nameSuffixes);\n  this.strings.flatten();\n  this.s2i = null; //we don't need this temporary map once we've built the strings list\n};\n\n\n\nexport function InstanceTreeAccess(nodeArray, rootId, nodeBoxes) {\n  this.nodes = nodeArray.nodes;\n  this.children = nodeArray.children;\n  this.dbIdToIndex = nodeArray.dbIdToIndex;\n  this.names = nodeArray.names;\n  this.nameSuffixes = nodeArray.nameSuffixes;\n  this.strings = new FlatStringStorage(nodeArray.strings);\n  this.rootId = rootId;\n  this.numNodes = this.nodes.length / SIZEOF_NODE;\n  this.visibleIds = null;\n\n  // only used if bboxes are precomputed\n  this.nodeBoxes = nodeBoxes;\n}\n\nInstanceTreeAccess.prototype.getNumNodes = function () {\n  return this.numNodes;\n};\n\nInstanceTreeAccess.prototype.getIndex = function (dbId) {\n  return this.dbIdToIndex[dbId];\n};\n\nInstanceTreeAccess.prototype.name = function (dbId, includeCount) {\n  var idx = this.dbIdToIndex[dbId];\n  var base = this.strings.get(this.names[idx]);\n  var suffix = this.nameSuffixes[idx];\n  var name;\n  if (suffix) {\n    //NOTE: update this logic if more separators are supported in processName above\n    var lastChar = base.charAt(base.length - 1);\n    if (lastChar === \"[\")\n    name = base + suffix + \"]\";else\n\n    name = base + suffix;\n  } else {\n    name = base;\n  }\n\n  if (includeCount) {\n    if (!this.childCounts) {\n      this.computeChildCounts();\n    }\n    if (this.childCounts[dbId] > 0) {\n      name += \" (\" + this.childCounts[dbId] + \")\";\n    }\n  }\n\n  return name;\n};\n\nInstanceTreeAccess.prototype.getParentId = function (dbId) {\n  var idx = this.dbIdToIndex[dbId];\n  return this.nodes[idx * SIZEOF_NODE + OFFSET_PARENT];\n};\n\nInstanceTreeAccess.prototype.getNodeFlags = function (dbId) {\n  var idx = this.dbIdToIndex[dbId];\n  return this.nodes[idx * SIZEOF_NODE + OFFSET_FLAGS];\n};\n\nInstanceTreeAccess.prototype.setNodeFlags = function (dbId, flags) {\n  var idx = this.dbIdToIndex[dbId];\n  if (idx) {\n    this.nodes[idx * SIZEOF_NODE + OFFSET_FLAGS] = flags;\n  }\n};\n\nInstanceTreeAccess.prototype.getNumChildren = function (dbId) {\n\n  var idx = this.dbIdToIndex[dbId];\n  var numChildren = this.nodes[idx * SIZEOF_NODE + OFFSET_NUM_CHILD];\n\n  //If numChildren is non-negative, then all children are nodes (not fragments)\n  if (numChildren >= 0)\n  return numChildren;\n\n  //Node has mixed fragments and child nodes, so we have to loop and collect just the node children\n  var firstChild = this.nodes[idx * SIZEOF_NODE + OFFSET_FIRST_CHILD];\n\n  numChildren = Math.abs(numChildren);\n\n  var numNodeChildren = 0;\n\n  for (var i = 0; i < numChildren; i++) {\n    var childIdx = this.children[firstChild + i];\n\n    //did we reach the fragment ids sub-list?\n    if (childIdx < 0)\n    break;\n\n    numNodeChildren++;\n  }\n\n  return numNodeChildren;\n};\n\nInstanceTreeAccess.prototype.getNumFragments = function (dbId) {\n  var idx = this.dbIdToIndex[dbId];\n\n  var numChildren = this.nodes[idx * SIZEOF_NODE + OFFSET_NUM_CHILD];\n\n  //If numChildren is non-negative, there aren't any fragments belonging to this node\n  if (numChildren >= 0)\n  return 0;\n\n  //Node has mixed fragments and child nodes, so we have to loop and collect just the node children\n  var firstChild = this.nodes[idx * SIZEOF_NODE + OFFSET_FIRST_CHILD];\n\n  numChildren = Math.abs(numChildren);\n\n  var numFragChildren = 0;\n\n  //Iterate backwards, because fragment children are at the back of the children list\n  for (var i = numChildren - 1; i >= 0; i--) {\n    var childIdx = this.children[firstChild + i];\n\n    //did we reach the inner node children ids sub-list?\n    if (childIdx >= 0)\n    break;\n\n    numFragChildren++;\n  }\n\n  return numFragChildren;\n};\n\n// NOTE: This can only be used if precomputed bboxes are available.\nInstanceTreeAccess.prototype.getNodeBox = function (dbId, dst) {\n  var idx = this.getIndex(dbId);\n  var off = idx * 6;\n  for (var i = 0; i < 6; i++) {\n    dst[i] = this.nodeBoxes[off + i];}\n};\n\n//Returns an array containing the dbIds of all objects\n//that are physically represented in the scene. Not all\n//objects in the property database occur physically in each graphics viewable.\nInstanceTreeAccess.prototype.getVisibleIds = function () {\n  if (!this.visibleIds) {\n    this.visibleIds = Object.keys(this.dbIdToIndex).map(function (k) {return parseInt(k);});\n  }\n\n  return this.visibleIds;\n};\n\n\nInstanceTreeAccess.prototype.enumNodeChildren = function (dbId, callback) {\n  var idx = this.dbIdToIndex[dbId];\n  var firstChild = this.nodes[idx * SIZEOF_NODE + OFFSET_FIRST_CHILD];\n  var numChildren = this.nodes[idx * SIZEOF_NODE + OFFSET_NUM_CHILD];\n\n  numChildren = Math.abs(numChildren);\n\n  for (var i = 0; i < numChildren; i++) {\n    var childIdx = this.children[firstChild + i];\n\n    //did we reach the fragment ids sub-list?\n    if (childIdx < 0)\n    break;\n\n    var childDbId = this.nodes[childIdx * SIZEOF_NODE + OFFSET_DBID];\n    if (callback(childDbId, dbId, idx)) {\n      return dbId;\n    }\n  }\n};\n\nInstanceTreeAccess.prototype.enumNodeFragments = function (dbId, callback) {\n  var idx = this.dbIdToIndex[dbId];\n  var firstChild = this.nodes[idx * SIZEOF_NODE + OFFSET_FIRST_CHILD];\n  var numChildren = this.nodes[idx * SIZEOF_NODE + OFFSET_NUM_CHILD];\n\n  //If numChildren is negative, it means there are fragments in the node\n  if (numChildren < 0) {\n    numChildren = -numChildren;\n    for (var i = 0; i < numChildren; i++) {\n      var childIdx = this.children[firstChild + i];\n\n      //skip past children that are inner nodes (not fragments)\n      if (childIdx > 0)\n      continue;\n\n      //Convert fragId from -1 based negative back to the actual fragId\n      if (callback(-childIdx - 1, dbId, idx)) {\n        return dbId;\n      }\n    }\n  }\n};\n\nInstanceTreeAccess.prototype.computeBoxes = function (fragBoxes) {\n\n  if (!this.nodeBoxes) {\n    this.nodeBoxes = new Float32Array(6 * this.numNodes);\n  }\n\n  var nodeAccess = this;\n  var idx = nodeAccess.getIndex(nodeAccess.rootId);\n  var nodeBoxes = nodeAccess.nodeBoxes;\n\n  function traverseChildren(child_dbId, parentDbID, parentIdx) {\n\n    var childIdx = nodeAccess.getIndex(child_dbId);\n\n    //Recurse, then add all child boxes to make this node's box\n    computeTreeBBoxesRec(child_dbId, childIdx);\n\n    var box_offset = parentIdx * 6;\n    var child_box_offset = childIdx * 6;\n    for (var k = 0; k < 3; k++) {\n      if (nodeBoxes[box_offset + k] > nodeBoxes[child_box_offset + k])\n      nodeBoxes[box_offset + k] = nodeBoxes[child_box_offset + k];\n      if (nodeBoxes[box_offset + k + 3] < nodeBoxes[child_box_offset + k + 3])\n      nodeBoxes[box_offset + k + 3] = nodeBoxes[child_box_offset + k + 3];\n    }\n  }\n\n  function traverseFragments(fragId, dbId, idx) {\n    var frag_box_offset = fragId * 6;\n    var box_offset = idx * 6;\n\n    for (var k = 0; k < 3; k++) {\n      if (nodeBoxes[box_offset + k] > fragBoxes[frag_box_offset + k])\n      nodeBoxes[box_offset + k] = fragBoxes[frag_box_offset + k];\n      if (nodeBoxes[box_offset + k + 3] < fragBoxes[frag_box_offset + k + 3])\n      nodeBoxes[box_offset + k + 3] = fragBoxes[frag_box_offset + k + 3];\n    }\n  }\n\n  function computeTreeBBoxesRec(dbId, idx) {\n\n    var box_offset = idx * 6;\n    nodeBoxes[box_offset] = nodeBoxes[box_offset + 1] = nodeBoxes[box_offset + 2] = Infinity;\n    nodeBoxes[box_offset + 3] = nodeBoxes[box_offset + 4] = nodeBoxes[box_offset + 5] = -Infinity;\n\n    if (nodeAccess.getNumChildren(dbId)) {\n      nodeAccess.enumNodeChildren(dbId, traverseChildren, true);\n    }\n\n    //Leaf node -- don't think it's possible for a node to have\n    //both children and leaf fragments, but we do handle that here.\n    if (nodeAccess.getNumFragments(dbId)) {\n      nodeAccess.enumNodeFragments(dbId, traverseFragments);\n    }\n\n  }\n\n  computeTreeBBoxesRec(nodeAccess.rootId, idx);\n};\n\nInstanceTreeAccess.prototype.computeChildCounts = function () {\n  if (!this.childCounts) {\n    this.childCounts = new Uint32Array(this.numNodes);\n  }\n\n  var nodeAccess = this;\n  var idx = nodeAccess.getIndex(nodeAccess.rootId);\n  var childCounts = nodeAccess.childCounts;\n\n  function traverseChildren(child_dbId, parentDbID, parentIdx) {\n\n    var childIdx = nodeAccess.getIndex(child_dbId);\n\n    //Recurse, then add all child boxes to make this node's box\n    var count = computeChildCountsRec(child_dbId, childIdx);\n\n    childCounts[parentDbID] += count;\n  }\n\n\n  function computeChildCountsRec(dbId, idx) {\n\n    var flags = nodeAccess.getNodeFlags(dbId);\n    var myCount = 0;\n\n    if (flags === 0x4 /*NODE_TYPE_COMPOSITE*/) {\n        //If it's a composite node, treat it as a single\n        //opaque object whose contents don't matter to the user\n        //for counting purposes.\n        myCount = 1;\n      } else {\n\n      if (nodeAccess.getNumChildren(dbId)) {\n        nodeAccess.enumNodeChildren(dbId, traverseChildren, true);\n      }\n\n      //Leaf node\n      if (nodeAccess.getNumFragments(dbId)) {\n        myCount = 1;\n      }\n    }\n\n    return myCount + childCounts[dbId];\n  }\n\n  computeChildCountsRec(nodeAccess.rootId, idx);\n};","\nexport function allocateUintArray(size, maxInt) {\n  if (maxInt <= 255) {\n    return new Uint8Array(size);\n  } else if (maxInt <= 65535) {\n    return new Uint16Array(size);\n  }\n\n  return new Uint32Array(size);\n}\n\nexport function reallocateUintArrayMaybe(arr, val) {\n\n  if (val <= 255)\n  return arr;\n\n  if (val <= 65535 && arr instanceof Uint8Array) {\n    var ret = new Uint16Array(arr.length);\n    ret.set(arr);\n    return ret;\n  }\n\n  if (!arr instanceof Uint32Array) {\n    var _ret = new Uint32Array(arr.length);\n    _ret.set(arr);\n    return _ret;\n  }\n\n  return arr;\n}","/**\n * @author bhouston / http://exocortex.com\n * @author WestLangley / http://github.com/WestLangley\n */\n/* Pruned version of THREE.Box3, for use in the LMV web worker */\n\nimport { LmvVector3 } from './LmvVector3';\n\nexport var LmvBox3 = function LmvBox3(min, max) {\n\n  this.min = min !== undefined ? min : new LmvVector3(Infinity, Infinity, Infinity);\n  this.max = max !== undefined ? max : new LmvVector3(-Infinity, -Infinity, -Infinity);\n\n};\n\nLmvBox3.prototype = {\n\n  constructor: LmvBox3,\n\n  set: function set(min, max) {\n\n    this.min.copy(min);\n    this.max.copy(max);\n\n    return this;\n\n  },\n\n  setFromPoints: function setFromPoints(points) {\n\n    this.makeEmpty();\n\n    for (var i = 0, il = points.length; i < il; i++) {\n\n      this.expandByPoint(points[i]);\n\n    }\n\n    return this;\n\n  },\n\n  setFromArray: function setFromArray(array, offset) {\n\n    this.min.x = array[offset];\n    this.min.y = array[offset + 1];\n    this.min.z = array[offset + 2];\n\n    this.max.x = array[offset + 3];\n    this.max.y = array[offset + 4];\n    this.max.z = array[offset + 5];\n\n    return this;\n\n  },\n\n  copyToArray: function copyToArray(array, offset) {\n\n    array[offset] = this.min.x;\n    array[offset + 1] = this.min.y;\n    array[offset + 2] = this.min.z;\n\n    array[offset + 3] = this.max.x;\n    array[offset + 4] = this.max.y;\n    array[offset + 5] = this.max.z;\n\n  },\n\n  setFromCenterAndSize: function () {\n\n    var v1 = new LmvVector3();\n\n    return function (center, size) {\n\n      var halfSize = v1.copy(size).multiplyScalar(0.5);\n\n      this.min.copy(center).sub(halfSize);\n      this.max.copy(center).add(halfSize);\n\n      return this;\n\n    };\n\n  }(),\n\n  clone: function clone() {\n\n    return new this.constructor().copy(this);\n\n  },\n\n  copy: function copy(box) {\n\n    this.min.copy(box.min);\n    this.max.copy(box.max);\n\n    return this;\n\n  },\n\n  makeEmpty: function makeEmpty() {\n\n    this.min.x = this.min.y = this.min.z = Infinity;\n    this.max.x = this.max.y = this.max.z = -Infinity;\n\n    return this;\n\n  },\n\n  empty: function empty() {\n\n    // this is a more robust check for empty than ( volume <= 0 ) because volume can get positive with two negative axes\n\n    return this.max.x < this.min.x || this.max.y < this.min.y || this.max.z < this.min.z;\n\n  },\n\n  center: function center(optionalTarget) {\n\n    var result = optionalTarget || new LmvVector3();\n    return result.addVectors(this.min, this.max).multiplyScalar(0.5);\n\n  },\n\n  size: function size(optionalTarget) {\n\n    var result = optionalTarget || new LmvVector3();\n    return result.subVectors(this.max, this.min);\n\n  },\n\n  expandByPoint: function expandByPoint(point) {\n\n    this.min.min(point);\n    this.max.max(point);\n\n    return this;\n\n  },\n\n  expandByVector: function expandByVector(vector) {\n\n    this.min.sub(vector);\n    this.max.add(vector);\n\n    return this;\n\n  },\n\n  expandByScalar: function expandByScalar(scalar) {\n\n    this.min.addScalar(-scalar);\n    this.max.addScalar(scalar);\n\n    return this;\n\n  },\n\n  containsPoint: function containsPoint(point) {\n\n    if (point.x < this.min.x || point.x > this.max.x ||\n    point.y < this.min.y || point.y > this.max.y ||\n    point.z < this.min.z || point.z > this.max.z) {\n\n      return false;\n\n    }\n\n    return true;\n\n  },\n\n  containsBox: function containsBox(box) {\n\n    if (this.min.x <= box.min.x && box.max.x <= this.max.x &&\n    this.min.y <= box.min.y && box.max.y <= this.max.y &&\n    this.min.z <= box.min.z && box.max.z <= this.max.z) {\n\n      return true;\n\n    }\n\n    return false;\n\n  },\n\n  getParameter: function getParameter(point, optionalTarget) {\n\n    // This can potentially have a divide by zero if the box\n    // has a size dimension of 0.\n\n    var result = optionalTarget || new LmvVector3();\n\n    return result.set(\n    (point.x - this.min.x) / (this.max.x - this.min.x),\n    (point.y - this.min.y) / (this.max.y - this.min.y),\n    (point.z - this.min.z) / (this.max.z - this.min.z));\n\n\n  },\n\n  isIntersectionBox: function isIntersectionBox(box) {\n\n    // using 6 splitting planes to rule out intersections.\n\n    if (box.max.x < this.min.x || box.min.x > this.max.x ||\n    box.max.y < this.min.y || box.min.y > this.max.y ||\n    box.max.z < this.min.z || box.min.z > this.max.z) {\n\n      return false;\n\n    }\n\n    return true;\n\n  },\n\n  clampPoint: function clampPoint(point, optionalTarget) {\n\n    var result = optionalTarget || new LmvVector3();\n    return result.copy(point).clamp(this.min, this.max);\n\n  },\n\n  distanceToPoint: function () {\n\n    var v1 = new LmvVector3();\n\n    return function (point) {\n\n      var clampedPoint = v1.copy(point).clamp(this.min, this.max);\n      return clampedPoint.sub(point).length();\n\n    };\n\n  }(),\n\n  intersect: function intersect(box) {\n\n    this.min.max(box.min);\n    this.max.min(box.max);\n\n    return this;\n\n  },\n\n  union: function union(box) {\n\n    this.min.min(box.min);\n    this.max.max(box.max);\n\n    return this;\n\n  },\n\n  applyMatrix4: function () {\n\n    var points = [\n    new LmvVector3(),\n    new LmvVector3(),\n    new LmvVector3(),\n    new LmvVector3(),\n    new LmvVector3(),\n    new LmvVector3(),\n    new LmvVector3(),\n    new LmvVector3()];\n\n\n    return function (matrix) {\n\n      // NOTE: I am using a binary pattern to specify all 2^3 combinations below\n      points[0].set(this.min.x, this.min.y, this.min.z).applyMatrix4(matrix); // 000\n      points[1].set(this.min.x, this.min.y, this.max.z).applyMatrix4(matrix); // 001\n      points[2].set(this.min.x, this.max.y, this.min.z).applyMatrix4(matrix); // 010\n      points[3].set(this.min.x, this.max.y, this.max.z).applyMatrix4(matrix); // 011\n      points[4].set(this.max.x, this.min.y, this.min.z).applyMatrix4(matrix); // 100\n      points[5].set(this.max.x, this.min.y, this.max.z).applyMatrix4(matrix); // 101\n      points[6].set(this.max.x, this.max.y, this.min.z).applyMatrix4(matrix); // 110\n      points[7].set(this.max.x, this.max.y, this.max.z).applyMatrix4(matrix); // 111\n\n      this.makeEmpty();\n      this.setFromPoints(points);\n\n      return this;\n\n    };\n\n  }(),\n\n  translate: function translate(offset) {\n\n    this.min.add(offset);\n    this.max.add(offset);\n\n    return this;\n\n  },\n\n  equals: function equals(box) {\n\n    return box.min.equals(this.min) && box.max.equals(this.max);\n\n  } };","/**\n * @author mrdoob / http://mrdoob.com/\n * @author supereggbert / http://www.paulbrunt.co.uk/\n * @author philogb / http://blog.thejit.org/\n * @author jordi_ros / http://plattsoft.com\n * @author D1plo1d / http://github.com/D1plo1d\n * @author alteredq / http://alteredqualia.com/\n * @author mikael emtinger / http://gomo.se/\n * @author timknip / http://www.floorplanner.com/\n * @author bhouston / http://exocortex.com\n * @author WestLangley / http://github.com/WestLangley\n */\n/* Pruned version of THREE.Matrix4, for use in the LMV web worker */\n\nimport { LmvVector3 } from './LmvVector3';\n\nexport var LmvMatrix4 = function LmvMatrix4(useDoublePrecision) {\n\n  if (useDoublePrecision) {\n\n    this.elements = new Float64Array([\n\n    1, 0, 0, 0,\n    0, 1, 0, 0,\n    0, 0, 1, 0,\n    0, 0, 0, 1]);\n\n\n\n  } else {\n\n    this.elements = new Float32Array([\n\n    1, 0, 0, 0,\n    0, 1, 0, 0,\n    0, 0, 1, 0,\n    0, 0, 0, 1]);\n\n\n\n  }\n\n  this.isDoublePrecision = !!useDoublePrecision;\n\n};\n\nLmvMatrix4.prototype = {\n\n  constructor: LmvMatrix4,\n\n  set: function set(n11, n12, n13, n14, n21, n22, n23, n24, n31, n32, n33, n34, n41, n42, n43, n44) {\n\n    var te = this.elements;\n\n    te[0] = n11;te[4] = n12;te[8] = n13;te[12] = n14;\n    te[1] = n21;te[5] = n22;te[9] = n23;te[13] = n24;\n    te[2] = n31;te[6] = n32;te[10] = n33;te[14] = n34;\n    te[3] = n41;te[7] = n42;te[11] = n43;te[15] = n44;\n\n    return this;\n\n  },\n\n  identity: function identity() {\n\n    this.set(\n\n    1, 0, 0, 0,\n    0, 1, 0, 0,\n    0, 0, 1, 0,\n    0, 0, 0, 1);\n\n\n\n    return this;\n\n  },\n\n  copy: function copy(m) {\n\n    this.elements.set(m.elements);\n\n    return this;\n\n  },\n\n  makeRotationFromQuaternion: function makeRotationFromQuaternion(q) {\n\n    var te = this.elements;\n\n    var x = q.x,y = q.y,z = q.z,w = q.w;\n    var x2 = x + x,y2 = y + y,z2 = z + z;\n    var xx = x * x2,xy = x * y2,xz = x * z2;\n    var yy = y * y2,yz = y * z2,zz = z * z2;\n    var wx = w * x2,wy = w * y2,wz = w * z2;\n\n    te[0] = 1 - (yy + zz);\n    te[4] = xy - wz;\n    te[8] = xz + wy;\n\n    te[1] = xy + wz;\n    te[5] = 1 - (xx + zz);\n    te[9] = yz - wx;\n\n    te[2] = xz - wy;\n    te[6] = yz + wx;\n    te[10] = 1 - (xx + yy);\n\n    // last column\n    te[3] = 0;\n    te[7] = 0;\n    te[11] = 0;\n\n    // bottom row\n    te[12] = 0;\n    te[13] = 0;\n    te[14] = 0;\n    te[15] = 1;\n\n    return this;\n\n  },\n\n  multiply: function multiply(n) {\n\n    return this.multiplyMatrices(this, n);\n\n  },\n\n  multiplyMatrices: function multiplyMatrices(a, b) {\n\n    var ae = a.elements;\n    var be = b.elements;\n    var te = this.elements;\n\n    var a11 = ae[0],a12 = ae[4],a13 = ae[8],a14 = ae[12];\n    var a21 = ae[1],a22 = ae[5],a23 = ae[9],a24 = ae[13];\n    var a31 = ae[2],a32 = ae[6],a33 = ae[10],a34 = ae[14];\n    var a41 = ae[3],a42 = ae[7],a43 = ae[11],a44 = ae[15];\n\n    var b11 = be[0],b12 = be[4],b13 = be[8],b14 = be[12];\n    var b21 = be[1],b22 = be[5],b23 = be[9],b24 = be[13];\n    var b31 = be[2],b32 = be[6],b33 = be[10],b34 = be[14];\n    var b41 = be[3],b42 = be[7],b43 = be[11],b44 = be[15];\n\n    te[0] = a11 * b11 + a12 * b21 + a13 * b31 + a14 * b41;\n    te[4] = a11 * b12 + a12 * b22 + a13 * b32 + a14 * b42;\n    te[8] = a11 * b13 + a12 * b23 + a13 * b33 + a14 * b43;\n    te[12] = a11 * b14 + a12 * b24 + a13 * b34 + a14 * b44;\n\n    te[1] = a21 * b11 + a22 * b21 + a23 * b31 + a24 * b41;\n    te[5] = a21 * b12 + a22 * b22 + a23 * b32 + a24 * b42;\n    te[9] = a21 * b13 + a22 * b23 + a23 * b33 + a24 * b43;\n    te[13] = a21 * b14 + a22 * b24 + a23 * b34 + a24 * b44;\n\n    te[2] = a31 * b11 + a32 * b21 + a33 * b31 + a34 * b41;\n    te[6] = a31 * b12 + a32 * b22 + a33 * b32 + a34 * b42;\n    te[10] = a31 * b13 + a32 * b23 + a33 * b33 + a34 * b43;\n    te[14] = a31 * b14 + a32 * b24 + a33 * b34 + a34 * b44;\n\n    te[3] = a41 * b11 + a42 * b21 + a43 * b31 + a44 * b41;\n    te[7] = a41 * b12 + a42 * b22 + a43 * b32 + a44 * b42;\n    te[11] = a41 * b13 + a42 * b23 + a43 * b33 + a44 * b43;\n    te[15] = a41 * b14 + a42 * b24 + a43 * b34 + a44 * b44;\n\n    return this;\n\n  },\n\n  multiplyToArray: function multiplyToArray(a, b, r) {\n\n    var te = this.elements;\n\n    this.multiplyMatrices(a, b);\n\n    r[0] = te[0];r[1] = te[1];r[2] = te[2];r[3] = te[3];\n    r[4] = te[4];r[5] = te[5];r[6] = te[6];r[7] = te[7];\n    r[8] = te[8];r[9] = te[9];r[10] = te[10];r[11] = te[11];\n    r[12] = te[12];r[13] = te[13];r[14] = te[14];r[15] = te[15];\n\n    return this;\n\n  },\n\n  multiplyScalar: function multiplyScalar(s) {\n\n    var te = this.elements;\n\n    te[0] *= s;te[4] *= s;te[8] *= s;te[12] *= s;\n    te[1] *= s;te[5] *= s;te[9] *= s;te[13] *= s;\n    te[2] *= s;te[6] *= s;te[10] *= s;te[14] *= s;\n    te[3] *= s;te[7] *= s;te[11] *= s;te[15] *= s;\n\n    return this;\n\n  },\n\n  determinant: function determinant() {\n\n    var te = this.elements;\n\n    var n11 = te[0],n12 = te[4],n13 = te[8],n14 = te[12];\n    var n21 = te[1],n22 = te[5],n23 = te[9],n24 = te[13];\n    var n31 = te[2],n32 = te[6],n33 = te[10],n34 = te[14];\n    var n41 = te[3],n42 = te[7],n43 = te[11],n44 = te[15];\n\n    //TODO: make this more efficient\n    //( based on http://www.euclideanspace.com/maths/algebra/matrix/functions/inverse/fourD/index.htm )\n\n    return (\n      n41 * (\n      +n14 * n23 * n32 -\n      n13 * n24 * n32 -\n      n14 * n22 * n33 +\n      n12 * n24 * n33 +\n      n13 * n22 * n34 -\n      n12 * n23 * n34) +\n\n      n42 * (\n      +n11 * n23 * n34 -\n      n11 * n24 * n33 +\n      n14 * n21 * n33 -\n      n13 * n21 * n34 +\n      n13 * n24 * n31 -\n      n14 * n23 * n31) +\n\n      n43 * (\n      +n11 * n24 * n32 -\n      n11 * n22 * n34 -\n      n14 * n21 * n32 +\n      n12 * n21 * n34 +\n      n14 * n22 * n31 -\n      n12 * n24 * n31) +\n\n      n44 * (\n      -n13 * n22 * n31 -\n      n11 * n23 * n32 +\n      n11 * n22 * n33 +\n      n13 * n21 * n32 -\n      n12 * n21 * n33 +\n      n12 * n23 * n31));\n\n\n\n\n  },\n\n  transpose: function transpose() {\n\n    var te = this.elements;\n    var tmp;\n\n    tmp = te[1];te[1] = te[4];te[4] = tmp;\n    tmp = te[2];te[2] = te[8];te[8] = tmp;\n    tmp = te[6];te[6] = te[9];te[9] = tmp;\n\n    tmp = te[3];te[3] = te[12];te[12] = tmp;\n    tmp = te[7];te[7] = te[13];te[13] = tmp;\n    tmp = te[11];te[11] = te[14];te[14] = tmp;\n\n    return this;\n\n  },\n\n  flattenToArrayOffset: function flattenToArrayOffset(array, offset) {\n\n    var te = this.elements;\n\n    array[offset] = te[0];\n    array[offset + 1] = te[1];\n    array[offset + 2] = te[2];\n    array[offset + 3] = te[3];\n\n    array[offset + 4] = te[4];\n    array[offset + 5] = te[5];\n    array[offset + 6] = te[6];\n    array[offset + 7] = te[7];\n\n    array[offset + 8] = te[8];\n    array[offset + 9] = te[9];\n    array[offset + 10] = te[10];\n    array[offset + 11] = te[11];\n\n    array[offset + 12] = te[12];\n    array[offset + 13] = te[13];\n    array[offset + 14] = te[14];\n    array[offset + 15] = te[15];\n\n    return array;\n\n  },\n\n  setPosition: function setPosition(v) {\n\n    var te = this.elements;\n\n    te[12] = v.x;\n    te[13] = v.y;\n    te[14] = v.z;\n\n    return this;\n\n  },\n\n  getInverse: function getInverse(m, throwOnInvertible) {\n\n    // based on http://www.euclideanspace.com/maths/algebra/matrix/functions/inverse/fourD/index.htm\n    var te = this.elements;\n    var me = m.elements;\n\n    var n11 = me[0],n12 = me[4],n13 = me[8],n14 = me[12];\n    var n21 = me[1],n22 = me[5],n23 = me[9],n24 = me[13];\n    var n31 = me[2],n32 = me[6],n33 = me[10],n34 = me[14];\n    var n41 = me[3],n42 = me[7],n43 = me[11],n44 = me[15];\n\n    te[0] = n23 * n34 * n42 - n24 * n33 * n42 + n24 * n32 * n43 - n22 * n34 * n43 - n23 * n32 * n44 + n22 * n33 * n44;\n    te[4] = n14 * n33 * n42 - n13 * n34 * n42 - n14 * n32 * n43 + n12 * n34 * n43 + n13 * n32 * n44 - n12 * n33 * n44;\n    te[8] = n13 * n24 * n42 - n14 * n23 * n42 + n14 * n22 * n43 - n12 * n24 * n43 - n13 * n22 * n44 + n12 * n23 * n44;\n    te[12] = n14 * n23 * n32 - n13 * n24 * n32 - n14 * n22 * n33 + n12 * n24 * n33 + n13 * n22 * n34 - n12 * n23 * n34;\n    te[1] = n24 * n33 * n41 - n23 * n34 * n41 - n24 * n31 * n43 + n21 * n34 * n43 + n23 * n31 * n44 - n21 * n33 * n44;\n    te[5] = n13 * n34 * n41 - n14 * n33 * n41 + n14 * n31 * n43 - n11 * n34 * n43 - n13 * n31 * n44 + n11 * n33 * n44;\n    te[9] = n14 * n23 * n41 - n13 * n24 * n41 - n14 * n21 * n43 + n11 * n24 * n43 + n13 * n21 * n44 - n11 * n23 * n44;\n    te[13] = n13 * n24 * n31 - n14 * n23 * n31 + n14 * n21 * n33 - n11 * n24 * n33 - n13 * n21 * n34 + n11 * n23 * n34;\n    te[2] = n22 * n34 * n41 - n24 * n32 * n41 + n24 * n31 * n42 - n21 * n34 * n42 - n22 * n31 * n44 + n21 * n32 * n44;\n    te[6] = n14 * n32 * n41 - n12 * n34 * n41 - n14 * n31 * n42 + n11 * n34 * n42 + n12 * n31 * n44 - n11 * n32 * n44;\n    te[10] = n12 * n24 * n41 - n14 * n22 * n41 + n14 * n21 * n42 - n11 * n24 * n42 - n12 * n21 * n44 + n11 * n22 * n44;\n    te[14] = n14 * n22 * n31 - n12 * n24 * n31 - n14 * n21 * n32 + n11 * n24 * n32 + n12 * n21 * n34 - n11 * n22 * n34;\n    te[3] = n23 * n32 * n41 - n22 * n33 * n41 - n23 * n31 * n42 + n21 * n33 * n42 + n22 * n31 * n43 - n21 * n32 * n43;\n    te[7] = n12 * n33 * n41 - n13 * n32 * n41 + n13 * n31 * n42 - n11 * n33 * n42 - n12 * n31 * n43 + n11 * n32 * n43;\n    te[11] = n13 * n22 * n41 - n12 * n23 * n41 - n13 * n21 * n42 + n11 * n23 * n42 + n12 * n21 * n43 - n11 * n22 * n43;\n    te[15] = n12 * n23 * n31 - n13 * n22 * n31 + n13 * n21 * n32 - n11 * n23 * n32 - n12 * n21 * n33 + n11 * n22 * n33;\n\n    var det = n11 * te[0] + n21 * te[4] + n31 * te[8] + n41 * te[12];\n\n    if (det == 0) {\n\n      var msg = \"Matrix4.getInverse(): can't invert matrix, determinant is 0\";\n\n      if (throwOnInvertible || false) {\n\n        throw new Error(msg);\n\n      } else {\n\n        console.warn(msg);\n\n      }\n\n      this.identity();\n\n      return this;\n    }\n\n    this.multiplyScalar(1 / det);\n\n    return this;\n\n  },\n\n  scale: function scale(v) {\n\n    var te = this.elements;\n    var x = v.x,y = v.y,z = v.z;\n\n    te[0] *= x;te[4] *= y;te[8] *= z;\n    te[1] *= x;te[5] *= y;te[9] *= z;\n    te[2] *= x;te[6] *= y;te[10] *= z;\n    te[3] *= x;te[7] *= y;te[11] *= z;\n\n    return this;\n\n  },\n\n  getMaxScaleOnAxis: function getMaxScaleOnAxis() {\n\n    var te = this.elements;\n\n    var scaleXSq = te[0] * te[0] + te[1] * te[1] + te[2] * te[2];\n    var scaleYSq = te[4] * te[4] + te[5] * te[5] + te[6] * te[6];\n    var scaleZSq = te[8] * te[8] + te[9] * te[9] + te[10] * te[10];\n\n    return Math.sqrt(Math.max(scaleXSq, Math.max(scaleYSq, scaleZSq)));\n\n  },\n\n  makeTranslation: function makeTranslation(x, y, z) {\n\n    this.set(\n\n    1, 0, 0, x,\n    0, 1, 0, y,\n    0, 0, 1, z,\n    0, 0, 0, 1);\n\n\n\n    return this;\n\n  },\n\n  makeRotationX: function makeRotationX(theta) {\n\n    var c = Math.cos(theta),s = Math.sin(theta);\n\n    this.set(\n\n    1, 0, 0, 0,\n    0, c, -s, 0,\n    0, s, c, 0,\n    0, 0, 0, 1);\n\n\n\n    return this;\n\n  },\n\n  makeRotationY: function makeRotationY(theta) {\n\n    var c = Math.cos(theta),s = Math.sin(theta);\n\n    this.set(\n\n    c, 0, s, 0,\n    0, 1, 0, 0,\n    -s, 0, c, 0,\n    0, 0, 0, 1);\n\n\n\n    return this;\n\n  },\n\n  makeRotationZ: function makeRotationZ(theta) {\n\n    var c = Math.cos(theta),s = Math.sin(theta);\n\n    this.set(\n\n    c, -s, 0, 0,\n    s, c, 0, 0,\n    0, 0, 1, 0,\n    0, 0, 0, 1);\n\n\n\n    return this;\n\n  },\n\n  makeRotationAxis: function makeRotationAxis(axis, angle) {\n\n    // Based on http://www.gamedev.net/reference/articles/article1199.asp\n\n    var c = Math.cos(angle);\n    var s = Math.sin(angle);\n    var t = 1 - c;\n    var x = axis.x,y = axis.y,z = axis.z;\n    var tx = t * x,ty = t * y;\n\n    this.set(\n\n    tx * x + c, tx * y - s * z, tx * z + s * y, 0,\n    tx * y + s * z, ty * y + c, ty * z - s * x, 0,\n    tx * z - s * y, ty * z + s * x, t * z * z + c, 0,\n    0, 0, 0, 1);\n\n\n\n    return this;\n\n  },\n\n  makeScale: function makeScale(x, y, z) {\n\n    this.set(\n\n    x, 0, 0, 0,\n    0, y, 0, 0,\n    0, 0, z, 0,\n    0, 0, 0, 1);\n\n\n\n    return this;\n\n  },\n\n  compose: function compose(position, quaternion, scale) {\n\n    this.makeRotationFromQuaternion(quaternion);\n    this.scale(scale);\n    this.setPosition(position);\n\n    return this;\n\n  },\n\n  decompose: function () {\n\n    var vector = new LmvVector3();\n    var matrix = new LmvMatrix4(true);\n\n    return function (position, quaternion, scale) {\n\n      var te = this.elements;\n\n      var sx = vector.set(te[0], te[1], te[2]).length();\n      var sy = vector.set(te[4], te[5], te[6]).length();\n      var sz = vector.set(te[8], te[9], te[10]).length();\n\n      // if determine is negative, we need to invert one scale\n      var det = this.determinant();\n      if (det < 0) {\n        sx = -sx;\n      }\n\n      position.x = te[12];\n      position.y = te[13];\n      position.z = te[14];\n\n      // scale the rotation part\n\n      matrix.elements.set(this.elements); // at this point matrix is incomplete so we can't use .copy()\n\n      var invSX = 1 / sx;\n      var invSY = 1 / sy;\n      var invSZ = 1 / sz;\n\n      matrix.elements[0] *= invSX;\n      matrix.elements[1] *= invSX;\n      matrix.elements[2] *= invSX;\n\n      matrix.elements[4] *= invSY;\n      matrix.elements[5] *= invSY;\n      matrix.elements[6] *= invSY;\n\n      matrix.elements[8] *= invSZ;\n      matrix.elements[9] *= invSZ;\n      matrix.elements[10] *= invSZ;\n\n      quaternion.setFromRotationMatrix(matrix);\n\n      scale.x = sx;\n      scale.y = sy;\n      scale.z = sz;\n\n      return this;\n\n    };\n\n  }(),\n\n  //Added for LMV\n  transformPoint: function transformPoint(pt) {\n\n    // input: THREE.Matrix4 affine matrix\n\n    var x = pt.x,y = pt.y,z = pt.z;\n\n    var e = this.elements;\n\n    pt.x = e[0] * x + e[4] * y + e[8] * z + e[12];\n    pt.y = e[1] * x + e[5] * y + e[9] * z + e[13];\n    pt.z = e[2] * x + e[6] * y + e[10] * z + e[14];\n\n    return pt;\n  },\n\n  //Added for LMV\n  transformDirection: function transformDirection(v) {\n\n    // input: THREE.Matrix4 affine matrix\n    // vector interpreted as a direction\n\n    var x = v.x,y = v.y,z = v.z;\n\n    var e = this.elements;\n\n    v.x = e[0] * x + e[4] * y + e[8] * z;\n    v.y = e[1] * x + e[5] * y + e[9] * z;\n    v.z = e[2] * x + e[6] * y + e[10] * z;\n\n    var len = Math.sqrt(v.x * v.x + v.y * v.y + v.z * v.z);\n    if (len > 0) {\n      var ilen = 1.0 / len;\n      v.x *= ilen;\n      v.y *= ilen;\n      v.z *= ilen;\n    }\n\n    return v;\n  },\n\n  equals: function equals(matrix) {\n\n    var te = this.elements;\n    var me = matrix.elements;\n\n    for (var i = 0; i < 16; i++) {\n\n      if (te[i] !== me[i]) return false;\n\n    }\n\n    return true;\n\n  },\n\n  fromArray: function fromArray(array) {\n\n    this.elements.set(array);\n\n    return this;\n\n  },\n\n  toArray: function toArray() {\n\n    var te = this.elements;\n\n    return [\n    te[0], te[1], te[2], te[3],\n    te[4], te[5], te[6], te[7],\n    te[8], te[9], te[10], te[11],\n    te[12], te[13], te[14], te[15]];\n\n\n  },\n\n  clone: function clone() {\n\n    return new LmvMatrix4(this.isDoublePrecision).fromArray(this.elements);\n\n  } };","/**\n * @author mrdoob / http://mrdoob.com/\n * @author *kile / http://kile.stravaganza.org/\n * @author philogb / http://blog.thejit.org/\n * @author mikael emtinger / http://gomo.se/\n * @author egraether / http://egraether.com/\n * @author WestLangley / http://github.com/WestLangley\n */\n/* Pruned version of THREE.Vector3, for use in the LMV web worker */\n\nexport var LmvVector3 = function LmvVector3(x, y, z) {\n\n  this.x = x || 0;\n  this.y = y || 0;\n  this.z = z || 0;\n\n};\n\nLmvVector3.prototype = {\n\n  constructor: LmvVector3,\n\n  set: function set(x, y, z) {\n\n    this.x = x;\n    this.y = y;\n    this.z = z;\n\n    return this;\n\n  },\n\n  setX: function setX(x) {\n\n    this.x = x;\n\n    return this;\n\n  },\n\n  setY: function setY(y) {\n\n    this.y = y;\n\n    return this;\n\n  },\n\n  setZ: function setZ(z) {\n\n    this.z = z;\n\n    return this;\n\n  },\n\n  setComponent: function setComponent(index, value) {\n\n    switch (index) {\n\n      case 0:this.x = value;break;\n      case 1:this.y = value;break;\n      case 2:this.z = value;break;\n      default:throw new Error('index is out of range: ' + index);}\n\n\n\n  },\n\n  getComponent: function getComponent(index) {\n\n    switch (index) {\n\n      case 0:return this.x;\n      case 1:return this.y;\n      case 2:return this.z;\n      default:throw new Error('index is out of range: ' + index);}\n\n\n\n  },\n\n  clone: function clone() {\n\n    return new this.constructor(this.x, this.y, this.z);\n\n  },\n\n  copy: function copy(v) {\n\n    this.x = v.x;\n    this.y = v.y;\n    this.z = v.z;\n\n    return this;\n\n  },\n\n  add: function add(v, w) {\n\n    if (w !== undefined) {\n\n      console.warn('THREE.Vector3: .add() now only accepts one argument. Use .addVectors( a, b ) instead.');\n      return this.addVectors(v, w);\n\n    }\n\n    this.x += v.x;\n    this.y += v.y;\n    this.z += v.z;\n\n    return this;\n\n  },\n\n  addScalar: function addScalar(s) {\n\n    this.x += s;\n    this.y += s;\n    this.z += s;\n\n    return this;\n\n  },\n\n  addVectors: function addVectors(a, b) {\n\n    this.x = a.x + b.x;\n    this.y = a.y + b.y;\n    this.z = a.z + b.z;\n\n    return this;\n\n  },\n\n  addScaledVector: function addScaledVector(v, s) {\n\n    this.x += v.x * s;\n    this.y += v.y * s;\n    this.z += v.z * s;\n\n    return this;\n\n  },\n\n  sub: function sub(v, w) {\n\n    if (w !== undefined) {\n\n      console.warn('THREE.Vector3: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.');\n      return this.subVectors(v, w);\n\n    }\n\n    this.x -= v.x;\n    this.y -= v.y;\n    this.z -= v.z;\n\n    return this;\n\n  },\n\n  subScalar: function subScalar(s) {\n\n    this.x -= s;\n    this.y -= s;\n    this.z -= s;\n\n    return this;\n\n  },\n\n  subVectors: function subVectors(a, b) {\n\n    this.x = a.x - b.x;\n    this.y = a.y - b.y;\n    this.z = a.z - b.z;\n\n    return this;\n\n  },\n\n  multiply: function multiply(v, w) {\n\n    if (w !== undefined) {\n\n      console.warn('THREE.Vector3: .multiply() now only accepts one argument. Use .multiplyVectors( a, b ) instead.');\n      return this.multiplyVectors(v, w);\n\n    }\n\n    this.x *= v.x;\n    this.y *= v.y;\n    this.z *= v.z;\n\n    return this;\n\n  },\n\n  multiplyScalar: function multiplyScalar(scalar) {\n\n    this.x *= scalar;\n    this.y *= scalar;\n    this.z *= scalar;\n\n    return this;\n\n  },\n\n  multiplyVectors: function multiplyVectors(a, b) {\n\n    this.x = a.x * b.x;\n    this.y = a.y * b.y;\n    this.z = a.z * b.z;\n\n    return this;\n\n  },\n\n  applyMatrix3: function applyMatrix3(m) {\n\n    var x = this.x;\n    var y = this.y;\n    var z = this.z;\n\n    var e = m.elements;\n\n    this.x = e[0] * x + e[3] * y + e[6] * z;\n    this.y = e[1] * x + e[4] * y + e[7] * z;\n    this.z = e[2] * x + e[5] * y + e[8] * z;\n\n    return this;\n\n  },\n\n  applyMatrix4: function applyMatrix4(m) {\n\n    // input: THREE.Matrix4 affine matrix\n\n    var x = this.x,y = this.y,z = this.z;\n\n    var e = m.elements;\n\n    this.x = e[0] * x + e[4] * y + e[8] * z + e[12];\n    this.y = e[1] * x + e[5] * y + e[9] * z + e[13];\n    this.z = e[2] * x + e[6] * y + e[10] * z + e[14];\n\n    return this;\n\n  },\n\n  applyProjection: function applyProjection(m) {\n\n    // input: THREE.Matrix4 projection matrix\n\n    var x = this.x,y = this.y,z = this.z;\n\n    var e = m.elements;\n    var d = 1 / (e[3] * x + e[7] * y + e[11] * z + e[15]); // perspective divide\n\n    this.x = (e[0] * x + e[4] * y + e[8] * z + e[12]) * d;\n    this.y = (e[1] * x + e[5] * y + e[9] * z + e[13]) * d;\n    this.z = (e[2] * x + e[6] * y + e[10] * z + e[14]) * d;\n\n    return this;\n\n  },\n\n  applyQuaternion: function applyQuaternion(q) {\n\n    var x = this.x;\n    var y = this.y;\n    var z = this.z;\n\n    var qx = q.x;\n    var qy = q.y;\n    var qz = q.z;\n    var qw = q.w;\n\n    // calculate quat * vector\n\n    var ix = qw * x + qy * z - qz * y;\n    var iy = qw * y + qz * x - qx * z;\n    var iz = qw * z + qx * y - qy * x;\n    var iw = -qx * x - qy * y - qz * z;\n\n    // calculate result * inverse quat\n\n    this.x = ix * qw + iw * -qx + iy * -qz - iz * -qy;\n    this.y = iy * qw + iw * -qy + iz * -qx - ix * -qz;\n    this.z = iz * qw + iw * -qz + ix * -qy - iy * -qx;\n\n    return this;\n\n  },\n\n  transformDirection: function transformDirection(m) {\n\n    // input: THREE.Matrix4 affine matrix\n    // vector interpreted as a direction\n\n    var x = this.x,y = this.y,z = this.z;\n\n    var e = m.elements;\n\n    this.x = e[0] * x + e[4] * y + e[8] * z;\n    this.y = e[1] * x + e[5] * y + e[9] * z;\n    this.z = e[2] * x + e[6] * y + e[10] * z;\n\n    this.normalize();\n\n    return this;\n\n  },\n\n  divide: function divide(v) {\n\n    this.x /= v.x;\n    this.y /= v.y;\n    this.z /= v.z;\n\n    return this;\n\n  },\n\n  divideScalar: function divideScalar(scalar) {\n\n    if (scalar !== 0) {\n\n      var invScalar = 1 / scalar;\n\n      this.x *= invScalar;\n      this.y *= invScalar;\n      this.z *= invScalar;\n\n    } else {\n\n      this.x = 0;\n      this.y = 0;\n      this.z = 0;\n\n    }\n\n    return this;\n\n  },\n\n  min: function min(v) {\n\n    if (this.x > v.x) {\n\n      this.x = v.x;\n\n    }\n\n    if (this.y > v.y) {\n\n      this.y = v.y;\n\n    }\n\n    if (this.z > v.z) {\n\n      this.z = v.z;\n\n    }\n\n    return this;\n\n  },\n\n  max: function max(v) {\n\n    if (this.x < v.x) {\n\n      this.x = v.x;\n\n    }\n\n    if (this.y < v.y) {\n\n      this.y = v.y;\n\n    }\n\n    if (this.z < v.z) {\n\n      this.z = v.z;\n\n    }\n\n    return this;\n\n  },\n\n  clamp: function clamp(min, max) {\n\n    // This function assumes min < max, if this assumption isn't true it will not operate correctly\n\n    if (this.x < min.x) {\n\n      this.x = min.x;\n\n    } else if (this.x > max.x) {\n\n      this.x = max.x;\n\n    }\n\n    if (this.y < min.y) {\n\n      this.y = min.y;\n\n    } else if (this.y > max.y) {\n\n      this.y = max.y;\n\n    }\n\n    if (this.z < min.z) {\n\n      this.z = min.z;\n\n    } else if (this.z > max.z) {\n\n      this.z = max.z;\n\n    }\n\n    return this;\n\n  },\n\n  clampScalar: function () {\n\n    var min, max;\n\n    return function clampScalar(minVal, maxVal) {\n\n      if (min === undefined) {\n\n        min = new LmvVector3();\n        max = new LmvVector3();\n\n      }\n\n      min.set(minVal, minVal, minVal);\n      max.set(maxVal, maxVal, maxVal);\n\n      return this.clamp(min, max);\n\n    };\n\n  }(),\n\n  floor: function floor() {\n\n    this.x = Math.floor(this.x);\n    this.y = Math.floor(this.y);\n    this.z = Math.floor(this.z);\n\n    return this;\n\n  },\n\n  ceil: function ceil() {\n\n    this.x = Math.ceil(this.x);\n    this.y = Math.ceil(this.y);\n    this.z = Math.ceil(this.z);\n\n    return this;\n\n  },\n\n  round: function round() {\n\n    this.x = Math.round(this.x);\n    this.y = Math.round(this.y);\n    this.z = Math.round(this.z);\n\n    return this;\n\n  },\n\n  roundToZero: function roundToZero() {\n\n    this.x = this.x < 0 ? Math.ceil(this.x) : Math.floor(this.x);\n    this.y = this.y < 0 ? Math.ceil(this.y) : Math.floor(this.y);\n    this.z = this.z < 0 ? Math.ceil(this.z) : Math.floor(this.z);\n\n    return this;\n\n  },\n\n  negate: function negate() {\n\n    this.x = -this.x;\n    this.y = -this.y;\n    this.z = -this.z;\n\n    return this;\n\n  },\n\n  dot: function dot(v) {\n\n    return this.x * v.x + this.y * v.y + this.z * v.z;\n\n  },\n\n  lengthSq: function lengthSq() {\n\n    return this.x * this.x + this.y * this.y + this.z * this.z;\n\n  },\n\n  length: function length() {\n\n    return Math.sqrt(this.x * this.x + this.y * this.y + this.z * this.z);\n\n  },\n\n  lengthManhattan: function lengthManhattan() {\n\n    return Math.abs(this.x) + Math.abs(this.y) + Math.abs(this.z);\n\n  },\n\n  normalize: function normalize() {\n\n    return this.divideScalar(this.length());\n\n  },\n\n  setLength: function setLength(l) {\n\n    var oldLength = this.length();\n\n    if (oldLength !== 0 && l !== oldLength) {\n\n      this.multiplyScalar(l / oldLength);\n\n    }\n\n    return this;\n\n  },\n\n  lerp: function lerp(v, alpha) {\n\n    this.x += (v.x - this.x) * alpha;\n    this.y += (v.y - this.y) * alpha;\n    this.z += (v.z - this.z) * alpha;\n\n    return this;\n\n  },\n\n  lerpVectors: function lerpVectors(v1, v2, alpha) {\n\n    this.subVectors(v2, v1).multiplyScalar(alpha).add(v1);\n\n    return this;\n\n  },\n\n  cross: function cross(v, w) {\n\n    if (w !== undefined) {\n\n      console.warn('THREE.Vector3: .cross() now only accepts one argument. Use .crossVectors( a, b ) instead.');\n      return this.crossVectors(v, w);\n\n    }\n\n    var x = this.x,y = this.y,z = this.z;\n\n    this.x = y * v.z - z * v.y;\n    this.y = z * v.x - x * v.z;\n    this.z = x * v.y - y * v.x;\n\n    return this;\n\n  },\n\n  crossVectors: function crossVectors(a, b) {\n\n    var ax = a.x,ay = a.y,az = a.z;\n    var bx = b.x,by = b.y,bz = b.z;\n\n    this.x = ay * bz - az * by;\n    this.y = az * bx - ax * bz;\n    this.z = ax * by - ay * bx;\n\n    return this;\n\n  },\n\n  projectOnVector: function () {\n\n    var v1, dot;\n\n    return function projectOnVector(vector) {\n\n      if (v1 === undefined) v1 = new LmvVector3();\n\n      v1.copy(vector).normalize();\n\n      dot = this.dot(v1);\n\n      return this.copy(v1).multiplyScalar(dot);\n\n    };\n\n  }(),\n\n  projectOnPlane: function () {\n\n    var v1;\n\n    return function projectOnPlane(planeNormal) {\n\n      if (v1 === undefined) v1 = new LmvVector3();\n\n      v1.copy(this).projectOnVector(planeNormal);\n\n      return this.sub(v1);\n\n    };\n\n  }(),\n\n  reflect: function () {\n\n    // reflect incident vector off plane orthogonal to normal\n    // normal is assumed to have unit length\n\n    var v1;\n\n    return function reflect(normal) {\n\n      if (v1 === undefined) v1 = new LmvVector3();\n\n      return this.sub(v1.copy(normal).multiplyScalar(2 * this.dot(normal)));\n\n    };\n\n  }(),\n\n  distanceTo: function distanceTo(v) {\n\n    return Math.sqrt(this.distanceToSquared(v));\n\n  },\n\n  distanceToSquared: function distanceToSquared(v) {\n\n    var dx = this.x - v.x;\n    var dy = this.y - v.y;\n    var dz = this.z - v.z;\n\n    return dx * dx + dy * dy + dz * dz;\n\n  },\n\n  setEulerFromRotationMatrix: function setEulerFromRotationMatrix(m, order) {\n\n    console.error('THREE.Vector3: .setEulerFromRotationMatrix() has been removed. Use Euler.setFromRotationMatrix() instead.');\n\n  },\n\n  setEulerFromQuaternion: function setEulerFromQuaternion(q, order) {\n\n    console.error('THREE.Vector3: .setEulerFromQuaternion() has been removed. Use Euler.setFromQuaternion() instead.');\n\n  },\n\n  getPositionFromMatrix: function getPositionFromMatrix(m) {\n\n    console.warn('THREE.Vector3: .getPositionFromMatrix() has been renamed to .setFromMatrixPosition().');\n\n    return this.setFromMatrixPosition(m);\n\n  },\n\n  getScaleFromMatrix: function getScaleFromMatrix(m) {\n\n    console.warn('THREE.Vector3: .getScaleFromMatrix() has been renamed to .setFromMatrixScale().');\n\n    return this.setFromMatrixScale(m);\n\n  },\n\n  getColumnFromMatrix: function getColumnFromMatrix(index, matrix) {\n\n    console.warn('THREE.Vector3: .getColumnFromMatrix() has been renamed to .setFromMatrixColumn().');\n\n    return this.setFromMatrixColumn(index, matrix);\n\n  },\n\n  setFromMatrixPosition: function setFromMatrixPosition(m) {\n\n    this.x = m.elements[12];\n    this.y = m.elements[13];\n    this.z = m.elements[14];\n\n    return this;\n\n  },\n\n  setFromMatrixScale: function setFromMatrixScale(m) {\n\n    var sx = this.set(m.elements[0], m.elements[1], m.elements[2]).length();\n    var sy = this.set(m.elements[4], m.elements[5], m.elements[6]).length();\n    var sz = this.set(m.elements[8], m.elements[9], m.elements[10]).length();\n\n    this.x = sx;\n    this.y = sy;\n    this.z = sz;\n\n    return this;\n\n  },\n\n  setFromMatrixColumn: function setFromMatrixColumn(index, matrix) {\n\n    var offset = index * 4;\n\n    var me = matrix.elements;\n\n    this.x = me[offset];\n    this.y = me[offset + 1];\n    this.z = me[offset + 2];\n\n    return this;\n\n  },\n\n  equals: function equals(v) {\n\n    return v.x === this.x && v.y === this.y && v.z === this.z;\n\n  },\n\n  fromArray: function fromArray(array, offset) {\n\n    if (offset === undefined) offset = 0;\n\n    this.x = array[offset];\n    this.y = array[offset + 1];\n    this.z = array[offset + 2];\n\n    return this;\n\n  },\n\n  toArray: function toArray(array, offset) {\n\n    if (array === undefined) array = [];\n    if (offset === undefined) offset = 0;\n\n    array[offset] = this.x;\n    array[offset + 1] = this.y;\n    array[offset + 2] = this.z;\n\n    return array;\n\n  },\n\n  fromAttribute: function fromAttribute(attribute, index, offset) {\n\n    if (offset === undefined) offset = 0;\n\n    index = index * attribute.itemSize + offset;\n\n    this.x = attribute.array[index];\n    this.y = attribute.array[index + 1];\n    this.z = attribute.array[index + 2];\n\n    return this;\n\n  } };","export var MeshFlags = {\n  // FragmentList flags\n  //visibility/highlight bitmask flags\n\n  //Byte 0\n\n  //NOTE: This is confusing and it should be fixed, but when the MESH_VISIBLE bit is off, the mesh\n  //will draw in ghosted mode. To completely skip drawing a mesh, set the HIDE flag.\n  MESH_VISIBLE: 1,\n  MESH_HIGHLIGHTED: 2,\n  MESH_HIDE: 4,\n  MESH_ISLINE: 8,\n  MESH_MOVED: 0x10, // indicates if an animation matrix is set\n  MESH_RENDERFLAG: 0x20,\n  MESH_NOTLOADED: 0x40, // the mesh has not yet loaded or has been unloaded\n  MESH_ISPOINT: 0x80, // indicates that the mesh is vertex-only\n\n  //Byte 1\n  //TODO: Two bits are enough to hold ISLINE, ISWIDELINE and ISPOINT, we don't need to waste three,\n  //but there is no point to optimizing this as long as the required flags go over one byte.\n  MESH_ISWIDELINE: 0x100, // indicates that the mesh is wide line\n  MESH_TRAVERSED: 0x200, // only used for paging: drawn fragments are tagged and then skipped by forEach() until the flag is being reset (e.g. on scene/camera changes)\n  MESH_DRAWN: 0x400 // only used for paging: drawn fragments are tagged. At the end of all render passes flag is copied to MESH_TRAVERSED.\n  // The Memory Limited Extension uses the high order three bits of this byte\n};","function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}import * as THREE from \"three\";\n\n\nvar pt = new THREE.Vector3();\nvar tmpBox = new Float32Array(6);\n\n\nvar STRATEGY_HIERARCHY = 'hierarchy'; // InstanceTree-approach\nvar STRATEGY_RADIAL = 'radial'; // FragList-approach\n\nvar _strategy = STRATEGY_HIERARCHY;\n\n/**\n                                     * Contains logic for exploding a model, which separate model parts away from the\n                                     * center, by using the model's hierarchy to drive the displacement.\n                                     *\n                                     * @private\n                                     */\nexport var ModelExploder = /*#__PURE__*/function () {\n\n  function ModelExploder() {_classCallCheck(this, ModelExploder);\n\n  }\n\n  /**\n     * Sets the algorithm identifier that will explode all models.\n     *\n     * @param {string} newStrategy - Algorithm identifier. Refer to STRETEGY_XXXX const values above.\n     *\n     * @returns {boolean} true if the strategy changed\n     */_createClass(ModelExploder, null, [{ key: \"setStrategy\", value: function setStrategy(\n    newStrategy) {\n      if (_strategy !== newStrategy) {\n        _strategy = newStrategy;\n        return true;\n      }\n    }\n\n    /**\n       * @returns {string} An identifier for the algorithm being used to explode models.\n       */ }, { key: \"getStrategy\", value: function getStrategy()\n    {\n      return _strategy;\n    }\n\n    /**\n       * @param {Autodesk.Viewing.Model} model - The model that will get its parts (dbIds) exploded.\n       * @param {Number} scale - Value between 0 (no explotion) to 1 (fully exploded).\n       */ }, { key: \"explode\", value: function explode(\n    model, scale) {\n\n      var it = model.getData().instanceTree;\n\n      var fragList = model.getFragmentList();\n\n      var mc = model.getVisibleBounds(true).center();\n\n      //If we have a full part hierarchy we can use a\n      //better grouping strategy when exploding\n      if (_strategy === STRATEGY_HIERARCHY && it && scale !== 0) {\n\n        _explodeWithInstanceTree(it, fragList, scale, mc);\n      } else\n      {\n\n        // _strategy === STRATEGY_RADIAL\n        _explodeWithFragList(fragList, it, scale, mc);\n      }\n    } }]);return ModelExploder;}();\n\n\n\n/**\n                                     * Applies explotion by leveraging the instanceTree.\n                                     *\n                                     * @param {InstanceTree} it\n                                     * @param {FragmentList} fragList\n                                     * @param {number} scale - Value between 0 and 1.\n                                     * @param {THREE.Vector3} mc - Model's Center point\n                                     *\n                                     * @private\n                                     */\nfunction _explodeWithInstanceTree(it, fragList, scale, mc) {\n\n  //Input scale is in the range 0-1, where 0\n  //means no displacement, and 1 maximum reasonable displacement.\n  scale *= 2;\n\n  // If scale is small (close to 0), the shift is only applied to the topmost levels of the hierarchy.\n  // With increasing s, we involve more and more hierarchy levels, i.e., children are recursively shifted \n  // away from their parent node centers.\n  // Since explodeValue is integer, it will behave discontinous during a transition from s=0 to s=1.\n  // To keep the overall transition continuous, we use the fractional part of scaledExplodeDepth\n  // to smoothly fade-in the transition at each hierarchy level. \n\n  // levels beyond explodeDepth, we stop shifting children away from their parent.\n  // \n  var scaledExplodeDepth = scale * (it.maxDepth - 1) + 1; // [1, 2 * it.maxDepth - 1]\n  if (it.maxDepth === 1) {\n    // Hack to get flat-instanceTrees to explode\n    scaledExplodeDepth = scale;\n  }\n  var explodeDepth = 0 | scaledExplodeDepth; // [1, 2 * it.maxDepth - 1]\n  var currentSegmentFraction = scaledExplodeDepth - explodeDepth; // [0, 1)\n\n  // Define recursive function to traverse object hierarchy. Each object is shifted away \n  // from the bbox center of its parent.\n  //  number nodeId:   dbId of the current instanceTree node\n  //  int depth:       tracks hierarchy level (0 for root)\n  //  vec3 (cx,cy,cz): center of the parent object (after applying the displacement to the parent object) \n  //  vec3 (ox,oy,oz): accumuled displacement from all parents on the path to root\n  function explodeRec(nodeId, depth, cx, cy, cz, ox, oy, oz) {\n\n    var oscale = scale * 2; //TODO: also possibly related to depth\n    if (depth == explodeDepth)\n    oscale *= currentSegmentFraction; //smooth transition of this tree depth from non-exploded to exploded state\n\n    // get bbox center of this node\n    it.getNodeBox(nodeId, tmpBox);\n    var mycx = 0.5 * (tmpBox[0] + tmpBox[3]);\n    var mycy = 0.5 * (tmpBox[1] + tmpBox[4]);\n    var mycz = 0.5 * (tmpBox[2] + tmpBox[5]);\n\n    // The root node (depth==0) has no parent to shift away from.\n    // For child nodes with level > explodDepth, we don't apply additional displacement anymore - just pass the displacement of the parents.\n    if (depth > 0 && depth <= explodeDepth) {\n      // add displacement to move this object away from its parent's bbox center (cx, cy, cz)\n      var dx = (mycx - cx) * oscale;\n      var dy = (mycy - cy) * oscale;\n      var dz = (mycz - cz) * oscale;\n\n      //var omax = Math.max(dx, Math.max(dy, dz));\n      // sum up offsets: The final displacement of a node is accumulated by its own shift and \n      // the shifts of all nodes up to the root.\n      ox += dx;\n      oy += dy;\n      oz += dz;\n    }\n\n    if (it.isNodeExplodeLocked(nodeId)) {\n      ox = oy = oz = 0;\n    }\n\n    // continue recursion with child objects (if any)\n    it.enumNodeChildren(nodeId, function (dbId) {\n      explodeRec(dbId, depth + 1, mycx, mycy, mycz, ox, oy, oz);\n    }, false);\n\n    pt.x = ox;\n    pt.y = oy;\n    pt.z = oz;\n\n    // set translation as anim transform for all fragments associated with the current node\n    it.enumNodeFragments(nodeId, function (fragId) {\n\n      fragList.updateAnimTransform(fragId, null, null, pt);\n\n    }, false);\n\n  }\n\n  explodeRec(it.getRootId(), 0, mc.x, mc.y, mc.z, 0, 0, 0); // run on root to start recursion\n}\n\n\n/**\n   * Applies explotion by leveraging the FragmentList (no hierarchy). \n   *\n   * @param {FragmentList} fragList\n   * @param {InstanceTree} it - Only used to check whether a dbId is \"locked\" and should not be exploded.\n   * @param {number} scale - Value between 0 and 1.\n   * @param {THREE.Vector3} mc - Model's Center point\n   */\nfunction _explodeWithFragList(fragList, it, scale, mc) {\n\n  // Float32Array array with 6 floats per bbox.\n  var boxes = fragList.fragments.boxes;\n\n  // The dbId to check for locked explode may come from the vizmesh\n  // or the fragId2dbId array, depending on how the model was loaded.\n  var vizmeshes;\n  var dbIds;\n  if (fragList.useThreeMesh)\n  vizmeshes = fragList.vizmeshes;else\n\n  dbIds = fragList.fragments.fragId2dbId;\n\n  for (var i = 0, iEnd = fragList.getCount(); i < iEnd; i++) {\n\n    // For scale to 0, if the node explode is locked.\n    if (scale == 0 || it && it.isNodeExplodeLocked(\n    vizmeshes ? vizmeshes[i] && vizmeshes[i].dbId : dbIds[i])) {\n      // reset to unexploded state, i.e., remove all animation transforms\n      fragList.updateAnimTransform(i);\n\n    } else {\n\n      // get start index of the bbox for fragment i. \n      var box_offset = i * 6;\n\n      // get bbox center of fragment i\n      var cx = 0.5 * (boxes[box_offset] + boxes[box_offset + 3]);\n      var cy = 0.5 * (boxes[box_offset + 1] + boxes[box_offset + 4]);\n      var cz = 0.5 * (boxes[box_offset + 2] + boxes[box_offset + 5]);\n\n      // compute translation vector for this fragment:\n      // We shift the fragment's bbox center c=(cx,cy,cz) away from the overall model center mc,\n      // so that the distance between the two will finally be scaled up by a factor of (1.0 + scale).\n      //\n      pt.x = scale * (cx - mc.x);\n      pt.y = scale * (cy - mc.y);\n      pt.z = scale * (cz - mc.z);\n\n      fragList.updateAnimTransform(i, null, null, pt);\n    }\n  }\n}","import { FrustumIntersector } from './FrustumIntersector';\nimport * as THREE from \"three\";\n\nexport function ModelIteratorBVH() {\n\n  var _frags;\n\n  // Nodes in the BVH, in an array for easy access to all of them.\n  // There are up to two trees, one for opaques, one for transparent objects.\n  // These are normally listed top-down, in a flattened list, e.g., if all the objects\n  // in the scene were transparent, _bvhNodes[0] = 0, and the 0 node would have not\n  // children and no primitives, as this node would contain all the opaque fragments,\n  // of which there are none. The transparent tree is always in _bvhNodes[1], and might\n  // look something like this:\n  //     1\n  //  2     3\n  // 4 5   6 7\n  // with the children 4-7 each containing a RenderBatch of some number of fragments. Note\n  // that inner nodes can also have RenderBatches.\n  var _bvhNodes = null;\n  // There's indirection for each RenderBatch. A RenderBatch contains a number of fragments.\n  // Rather than an array per RenderBatch, a single array is accessed by all RenderBatches.\n  // The primitives are in a list sorted by surface area. We preserve this. In this\n  // _bvhFragOrder array we by a flattened list of children fragment indices. So child 4,\n  // above, might have 3 objects, and their indices might be [291 12 55].\n  // primStart and primCount access this array.\n  // Also see bvh_partition and the comment there.\n  var _bvhFragOrder = null;\n  // _bvhScenes is a sparse array of RenderBatches, each RenderBatch has a few fragments.\n  // Only those elements in the array that have a RenderBatch are defined.\n  var _bvhScenes = null;\n  // What is the containment state of this node, if known? Is either CONTAINMENT_UNKNOWN\n  // or INTERSECTS or CONTAINS. If CONTAINS, we don't have to run the frustum cull\n  // test, saving a few percent in speed.\n  var _bvhContainment = null;\n  var _bvhNodeQueue = null,_bvhNodeAreas = null,_bvhHead,_bvhTail;\n  var _bvhLIFO = 1;\n  var _bvhPrioritizeScreenSize = true;\n  var _bvhOpaqueDone = false;\n  var _bvhOpaqueSkipped = false; // true if skipOpaqueShapes has been called in the current traversal.\n  var _tmpBox = new THREE.Box3();\n  var _tmpBox2 = new THREE.Box3();\n  var _frustum;\n  var _done = false;\n  var _RenderBatch;\n  //var _time0 = 0;\n  var _resetVisStatus = true;\n\n\n  this.initialize = function (renderModelLinear, nodes, primitives, options) {\n\n    _frags = renderModelLinear.getFragmentList();\n    // Take the RenderBatch class from the model, so on demand loading can\n    // use a different class to handle redraws propertly\n    _RenderBatch = renderModelLinear.RenderBatch;\n\n    if (options && options.hasOwnProperty(\"prioritize_screen_size\")) {\n      _bvhPrioritizeScreenSize = options.prioritize_screen_size;\n    }\n\n    _bvhFragOrder = primitives;\n    _bvhScenes = new Array(nodes.nodeCount);\n    _bvhContainment = new Int8Array(nodes.nodeCount);\n    _bvhNodes = nodes;\n    _bvhNodeQueue = new Int32Array(nodes.nodeCount + 1);\n    _bvhNodeAreas = new Float32Array(nodes.nodeCount);\n\n    for (var i = 0; i < nodes.nodeCount; i++) {\n      var primCount = nodes.getPrimCount(i);\n      // does this node have real objects in it?\n      if (primCount) {\n        _bvhScenes[i] = new _RenderBatch(_frags, _bvhFragOrder, nodes.getPrimStart(i), primCount);\n        // These are set manually, because we will not be adding fragments to the\n        // render batch one by one -- the fragments are already loaded.\n        _bvhScenes[i].lastItem = _bvhScenes[i].start + primCount;\n        _bvhScenes[i].numAdded = primCount;\n        _bvhScenes[i].nodeIndex = i;\n        if (nodes.getFlags(i) & 8) {\n          _bvhScenes[i].sortObjects = true; //scene contains transparent objects\n        }\n        nodes.getBoxArray(i, _bvhScenes[i].bboxes);\n      }\n    }\n\n  };\n\n  // note: fragId and mesh are not used in this function\n  this.addFragment = function (fragId, mesh) {\n  };\n\n\n  this.reset = function (frustum) {\n    _frustum = frustum;\n    _bvhHead = 0;_bvhTail = 0;\n    // means \"unknown containment state\"\n    _bvhContainment[0] = _bvhContainment[1] = FrustumIntersector.CONTAINMENT_UNKNOWN;\n    // prime the pump: the first entry is set to BVH node 0,\n    // which is the first node in the first hierarchy (the opaque one) that we'll examine.\n    // The ++ here is just for consistency; we could have set tail to 1\n    // and used 0 as the index. _bvhTail will immediately get decremented to 0 by nextBatch;\n    // it's incremented here to initially pass the while() loop there.\n    _bvhNodeQueue[_bvhTail++] = 0;\n    _bvhOpaqueDone = false;\n    _bvhOpaqueSkipped = false;\n    _done = false;\n    //_time0 = Date.now();\n    if (_resetVisStatus) {\n      var scenes = _bvhScenes;\n      var len = scenes.length;\n      for (var i = 0; i < len; ++i) {\n        var scene = scenes[i];\n        if (scene && scene.resetVisStatus) {\n          scene.resetVisStatus();\n        }\n      }\n      _resetVisStatus = false;\n    }\n  };\n\n\n  // Used to insert nodes into the (sorted) render queue based on\n  // a heuristic other than strict front to back or back to front order.\n  // Currently we always use this for sorting by screen area.\n  function insertNode(idx) {\n\n    //This is basically a single sub-loop of an insertion sort.\n\n    var val = _bvhNodeAreas[idx];\n    var j = _bvhTail;\n\n    if (_bvhLIFO) {\n      // For LIFO we insert the largest at the end of the list, since they\n      // are the first to be popped\n      while (j > _bvhHead && _bvhNodeAreas[_bvhNodeQueue[j - 1]] > val) {\n        _bvhNodeQueue[j] = _bvhNodeQueue[j - 1];\n        j--;\n      }\n    } else {\n      // For FIFO we insert the largest at the front of the list.\n      while (j > _bvhHead && _bvhNodeAreas[_bvhNodeQueue[j - 1]] < val) {\n        _bvhNodeQueue[j] = _bvhNodeQueue[j - 1];\n        j--;\n      }\n    }\n\n    _bvhNodeQueue[j] = idx;\n    _bvhTail++;\n  }\n\n  this.nextBatch = function () {\n\n    if (!_bvhOpaqueSkipped && !_bvhOpaqueDone && _bvhHead === _bvhTail) {\n      //If we are done with the opaque nodes, queue the transparent ones\n      //before processing the contents of the last opaque node\n      _bvhNodeQueue[_bvhTail++] = 1; //root of transparent subtree is at index 1\n      _bvhOpaqueDone = true;\n    }\n\n    // _bvhHead and _bvhTail are indices into the BVH node list. For the opaque objects\n    // these start at 0 and 1, respectively. The idea here is to work through the bounding\n    // volume hierarchy, with inner nodes sorted into the list by large-to-small screen area\n    // (or front-to-back, or back-to-front) order as we go. The way this loop ends is when\n    // nothing is on the BVH node stack, or a render batch of stuff to render is found.\n    // The next time this method is called, the current _bvhHead and _bvhTail values pick\n    // up where they left off, continuing to traverse the tree, until another batch is found\n    // or the stack (list) is emptied.\n    // Note: this is a breadth-first traversal, but render batches can and do get returned\n    // before the whole tree is traversed, because these can be found in inner nodes.\n    // This means that there may be nodes with larger screen areas that come later on.\n    while (_bvhHead !== _bvhTail) {\n\n      // Retrieve node index for what to process in the BVH. _bvhNodeQueue contains the indices\n      // of the node(s) in the BVH that are to be processed. \n      // For LIFO, for example, when the nodeIdx is first retrieved, _bvhTail initially\n      // goes to 0, and so grabs the index at location 0 in _bvhNodeQueue, typically the top of\n      // the opaque tree. The rest of this loop may add to this queue, and/or return fragments to\n      // render, in which case it exits. If nothing got returned (yet) and the loop continues,\n      // the next time around through this loop, the last\n      // BVH node put on this _bvhNodeQueue stack (if LIFO is true) is retrieved (if not LIFO,\n      // the first object on the list is retrieved and _bvhHead is incremented).\n      // Inner nodes will add their two children in proper order to _bvhNodeQueue and increment _bvhTail, twice.\n      var nodeIdx = _bvhLIFO || _bvhOpaqueDone ? _bvhNodeQueue[--_bvhTail] : _bvhNodeQueue[_bvhHead++];\n\n      // Is box already found to be contained? This happens when a box's parent is fully contained.\n      // We can then avoid the frustum test.\n      var intersects = _bvhContainment[nodeIdx];\n      if (intersects !== FrustumIntersector.CONTAINS) {\n        // could be outside or intersecting, so do test\n        _bvhNodes.getBoxThree(nodeIdx, _tmpBox);\n        intersects = _frustum.intersectsBox(_tmpBox);\n      }\n\n      //Node is entirely outside, go on to the next node\n      if (intersects !== FrustumIntersector.OUTSIDE) {\n        var child = _bvhNodes.getLeftChild(nodeIdx);\n        var isInner = child !== -1;\n        var firstIdx, secondIdx;\n\n        //Is it inner node? Add children for processing.\n        if (isInner) {\n          var flags = _bvhNodes.getFlags(nodeIdx);\n          var reverseAxis = _frustum.viewDir[flags & 3] < 0 ? 1 : 0;\n          var firstChild = flags >> 2 & 1;\n          var transparent = flags >> 3 & 1;\n          var depthFirst = _bvhLIFO || _bvhOpaqueDone ? 1 : 0;\n          var areaFirst = 0,areaSecond = 0;\n\n          // For opaque objects, use the screen size to sort the two children,\n          // or front to back order (back to front for transparent objects).\n          if (_bvhPrioritizeScreenSize && !_bvhOpaqueDone) {\n\n            //If traversing based on visible screen area, we have to\n            //compute the area for each child and insert them into\n            //the queue accordingly.\n\n            firstIdx = child + firstChild;\n            secondIdx = child + 1 - firstChild;\n\n            _bvhNodes.getBoxThree(firstIdx, _tmpBox);\n            _bvhNodeAreas[firstIdx] = areaFirst = _frustum.projectedBoxArea(_tmpBox, intersects === FrustumIntersector.CONTAINS);\n            _bvhNodes.getBoxThree(secondIdx, _tmpBox);\n            _bvhNodeAreas[secondIdx] = areaSecond = _frustum.projectedBoxArea(_tmpBox, intersects === FrustumIntersector.CONTAINS);\n\n            // \"worst case\" containment is recorded for later examination.\n            _bvhContainment[firstIdx] = _bvhContainment[secondIdx] = intersects;\n\n            // Insert each node in the right place based on screen area,\n            // so that the queue (or stack, if LIFO traversal) is kept sorted\n            // at every step of the way.\n            // Note that with LIFO, for example, the larger object is put last on\n            // the list (a stack), since we want to pop this one off first.\n            if (areaFirst > 0)\n            insertNode(firstIdx);\n\n            if (areaSecond > 0)\n            insertNode(secondIdx);\n          } else {\n\n            //Traversal by view direction.\n\n            //Reverse order if looking in the negative of the child split axis\n            //Reverse order if we are traversing last first\n            //If node contains transparent objects, then reverse the result so we traverse back to front.\n            //In other words, reverse the order if an odd number of flags are true.\n            if (reverseAxis ^ depthFirst ^ transparent)\n            firstChild = 1 - firstChild;\n\n            firstIdx = child + firstChild;\n            secondIdx = child + 1 - firstChild;\n\n            _bvhNodeQueue[_bvhTail++] = firstIdx;\n            _bvhNodeAreas[firstIdx] = -1; //TODO: This has to be something based on camera distance\n            //so that we can draw transparent back to front when multiple models are mixed\n\n            _bvhNodeQueue[_bvhTail++] = secondIdx;\n            _bvhNodeAreas[secondIdx] = -1;\n\n            // \"worst case\" containment is recorded for later examination.\n            _bvhContainment[firstIdx] = _bvhContainment[secondIdx] = intersects;\n          }\n\n        }\n\n        // Are there graphics in the node? Then return its scene, i.e. its RenderBatch.\n        // Inner nodes with children can and do have render batches of their own.\n        // This works against a pure screen=area or front-to-back ordering, as\n        // these fragments will always get returned first, before further traversal of the tree.\n        var prims = _bvhNodes.getPrimCount(nodeIdx);\n        if (prims !== 0) {\n          var scene = _bvhScenes[nodeIdx];\n\n          scene.renderImportance = _frustum.projectedBoxArea(scene.getBoundingBox(), intersects === FrustumIntersector.CONTAINS);\n\n          //NOTE: Frustum culling for the RenderBatch is done in\n          //RenderBatch.applyVisibility, so we don't need it here.\n          //Just return the batch and it will get cull checked later.\n          //TODO: May be we want to move the check to here, but then the linear iterator will also need to start checking.\n          /*\n           var whichBox = (_drawMode === RenderFlags.RENDER_HIDDEN) ? scene.getBoundingBoxHidden() : scene.getBoundingBox();\n            //If the geometry is attached to an inner node and we know\n           //it's not fully contained, we can narrow down the intersection\n           //by checking the box of just the inner node's geometry.\n           //The check for the node box itself also includes the children so it could be bigger.\n           if (intersects !== CONTAINS && isInner)\n           intersects = _frustum.intersectsBox(whichBox);\n            //Turn off frustum culling for the batch if it's fully contained\n           scene.frustumCulled = (intersects !== FrustumIntersector.CONTAINS);\n            if (intersects !== FrustumIntersector.OUTSIDE)\n           return scene;\n           */\n\n\n\n\n          return scene;\n        }\n      }\n\n      if (!_bvhOpaqueDone && !_bvhOpaqueSkipped && _bvhHead === _bvhTail) {\n        //If we are done with the opaque nodes, queue the transparent ones\n        //before processing the contents of the last opaque node\n        _bvhNodeQueue[_bvhTail++] = 1; //root of transparent subtree is at index 1\n        _bvhOpaqueDone = true;\n      }\n\n    }\n\n    //var time1 = Date.now();\n    //var msg = \"BVH traversal time: \" + (time1 - _time0);\n    //console.log(msg);\n\n    _done = true;\n    return null;\n  };\n\n  this.skipOpaqueShapes = function () {\n    if (!_bvhOpaqueDone && !_bvhOpaqueSkipped) {\n      // start traversal of transparent hierarchy\n      _bvhHead = 0;\n      _bvhTail = 0;\n      _bvhNodeQueue[_bvhTail++] = 1; //root of transparent subtree is at index 1\n      _bvhOpaqueSkipped = true;\n    }\n  };\n\n  function updateBVHRec(nodeIdx) {\n\n    var child = _bvhNodes.getLeftChild(nodeIdx);\n\n    if (child !== -1) {\n      updateBVHRec(child);\n      updateBVHRec(child + 1);\n    }\n\n    _tmpBox.makeEmpty();\n\n    if (child !== -1) {\n      _bvhNodes.getBoxThree(child, _tmpBox2);\n      _tmpBox.union(_tmpBox2);\n\n      _bvhNodes.getBoxThree(child + 1, _tmpBox2);\n      _tmpBox.union(_tmpBox2);\n    }\n\n    var prims = _bvhNodes.getPrimCount(nodeIdx);\n    if (prims) {\n      _tmpBox.union(_bvhScenes[nodeIdx].getBoundingBox());\n      _tmpBox.union(_bvhScenes[nodeIdx].getBoundingBoxHidden());\n    }\n\n    _bvhNodes.setBoxThree(nodeIdx, _tmpBox);\n  }\n\n  this.getVisibleBounds = function (visibleBounds, visibleBoundsWithHidden) {\n\n    for (var i = 0; i < _bvhScenes.length; i++) {\n\n      var s = _bvhScenes[i];\n\n      if (!s)\n      continue;\n\n      s.calculateBounds();\n\n      var bb = s.getBoundingBox();\n      visibleBounds.union(bb);\n\n      visibleBoundsWithHidden.union(bb);\n      visibleBoundsWithHidden.union(s.getBoundingBoxHidden());\n    }\n\n    //Also update all bounding volume tree nodes' bounds.\n    //If objects move too much this will make the BVH less effective.\n    //However, this only happens during explode or animation, so it shouldn't\n    //be an issue. We can always rebuild the BVH in case objects really move a lot.\n    updateBVHRec(0); //opaque root\n    updateBVHRec(1); //transparent root\n\n  };\n\n  this.rayCast = function (raycaster, intersects, dbIdFilter) {\n\n    var nodeStack = [1, 0];\n    var pt = new THREE.Vector3();\n\n    while (nodeStack.length) {\n      var nodeIdx = nodeStack.pop();\n\n      _bvhNodes.getBoxThree(nodeIdx, _tmpBox);\n\n      // Expand bounding box a bit, to take into account axis aligned lines\n      _tmpBox.expandByScalar(0.5);\n      var xPt = raycaster.ray.intersectBox(_tmpBox, pt);\n\n      if (xPt === null)\n      continue;\n\n      var child = _bvhNodes.getLeftChild(nodeIdx);\n      if (child !== -1) {\n        nodeStack.push(child);\n        nodeStack.push(child + 1);\n      }\n\n      var prims = _bvhNodes.getPrimCount(nodeIdx);\n      if (prims !== 0) {\n        var scene = _bvhScenes[nodeIdx];\n        scene.raycast(raycaster, intersects, dbIdFilter);\n      }\n    }\n\n  };\n  /*\n         this.getRenderProgress = function() {\n             return _renderCounter / _bvhScenes.length;\n         };\n     */\n  this.getSceneCount = function () {\n    return _bvhScenes.length;\n  };\n\n  this.getGeomScenes = function () {\n    return _bvhScenes;\n  };\n\n  this.done = function () {\n    return _done;\n  };\n\n  this.resetVisStatus = function () {\n    _resetVisStatus = true;\n  };\n\n}","function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError(\"Cannot call a class as a function\");}}function _defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if (\"value\" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}function _createClass(Constructor, protoProps, staticProps) {if (protoProps) _defineProperties(Constructor.prototype, protoProps);if (staticProps) _defineProperties(Constructor, staticProps);return Constructor;}import { RenderBatch } from './RenderBatch';\nimport { isMobileDevice } from '../../compat';\n\n\n//TODO: better heuristic for group size might be needed\n//But it should be based on polygon count as well as\n//fragment count. But polygon count is not known\n//until we get the meshes later on.\nvar MAX_FRAGS_PER_GROUP = 500;\n\nvar calculateFragsPerScene = function calculateFragsPerScene(is2d) {\n  // choose _fragsPerScene based on scene type and device\n  var fragsPerScene = MAX_FRAGS_PER_GROUP;\n  if (is2d)\n  fragsPerScene /= 6; //2d meshes are all fully packed, so we can't draw so many per batch.\n  if (isMobileDevice()) {\n    fragsPerScene /= 3; //This is tuned for ~15fps on Nexus 7.\n  }\n  fragsPerScene = Math.floor(fragsPerScene);\n  return fragsPerScene > 0 ? fragsPerScene : MAX_FRAGS_PER_GROUP;\n};\n\n/**\n    * All rendering and other scene related data associated with a 3D model or 2D Drawing.\n    * The \"linear\" variant uses simple non-hierarchical linear scene traversal when rendering a frame.\n    * Good for small scenes, incrementally loaded scenes, and 2D drawings where draw order matters.\n    * @constructor\n    */\nexport var ModelIteratorLinear = /*#__PURE__*/function () {\n\n  function ModelIteratorLinear(renderModel) {_classCallCheck(this, ModelIteratorLinear);\n\n    this._frags = renderModel.getFragmentList();\n    // Take the RenderBatch class from the model, so on demand loading can\n    // use a different class to handle redraws properly\n    this._RenderBatch = renderModel.RenderBatch;\n    this._model = renderModel;\n    this._is2d = this._model.is2d();\n    this._fragsPerScene = calculateFragsPerScene(renderModel.is2d());\n    this._fragOrder = [];\n    this._geomScenes = [];\n    this._secondPassIndex = null; // Used to mark where in _geomScenes the second pass scenes start.\n\n    var fragCount = this._frags.getCount();\n\n    // index of the scene in _geomScenes that the next nextBatch() call will return.\n    this._currentScene = 0;\n\n    //Custom re-order of the fragments for optimized rendering.\n    //those are indices into the immutable vizmeshes fragment list.\n    //Trivial largest to smallest order\n    var fragOrder = new Int32Array(fragCount);\n    for (var i = 0; i < fragCount; i++) {\n      fragOrder[i] = i;\n    }\n\n    this.setFragmentOrder(fragOrder, fragCount);\n  }_createClass(ModelIteratorLinear, [{ key: \"setFragmentOrder\", value: function setFragmentOrder(\n\n    fragOrder, fragmentCount) {\n      this._fragCount = fragmentCount;\n\n      //NOTE: We use the array container as reference to pass to RenderBatches, because the\n      //typed array can get resized when loading data with unknown size\n      this._fragOrder[0] = fragOrder;\n\n      //Create a RenderBatch for each batch of fragments.\n      //We will then draw each batch in turn to get a progressive\n      //effect. The number of fragments per batch should be close\n      //to what we can draw in a single frame while maintaining interactivity.\n      //This linear list of batches is used for 2D scenes and for 3D scenes\n      //while they are loading. After load is done, the linear traversal is replaced\n      //by a view-based bounding volume hierarchy traversal.\n\n      // Given the maximum fragCount per batch, compute the required number of batches to fit in all fragments\n      var numScenes = Math.floor((this._fragCount + this._fragsPerScene - 1) / this._fragsPerScene);\n\n      // create array with a RenderBatch per fragment group.\n      // Note that this will only create all batches if the full fragCount is known in advance. Otherwise, they have to be created\n      // later via addFragment() calls.\n      this._geomScenes.length = numScenes;\n      for (var i = 0; i < numScenes; i++) {\n        var startIndex = i * this._fragsPerScene;\n        var scene = this._geomScenes[i] = new this._RenderBatch(this._frags, this._fragOrder, startIndex, this._fragsPerScene);\n        var lastIndex = startIndex + this._fragsPerScene;\n\n        // Crop last batch at the end, so that it does not exceed the fragment count. The last batch has usually not full\n        // length, unless fragCount is a multiple of\n        if (lastIndex > this._fragCount)\n        lastIndex = this._fragCount;\n        scene.lastItem = lastIndex;\n      }\n    }\n\n    // Only needed if the full fragment count is not known in advance.\n    // For incremental loading, this method makes sure that \n    //  - fragOrder has required size \n    //  - fragOrder defines trivial ordering of all frags added so far\n    //  - _geomScenes contains a batch containing the new fragment\n    //\n    // Assumptions: Fragments are currently added by increasing fragId. Otherwise, _geomScenes might contain null-elements,\n    //              which may cause exceptions, e.g., in nextBatch() and getVisibleBounds().\n  }, { key: \"addFragment\", value: function addFragment(fragId) {\n      //The frag order indices array will not auto-resize (it's ArrayBuffer)\n      //so we have to do it manually\n      if (this._fragOrder[0].length <= fragId)\n      {\n        var nlen = 2 * this._fragOrder[0].length;\n        if (nlen <= fragId)\n        nlen = fragId + 1;\n\n        var ninds = new Int32Array(nlen);\n        ninds.set(this._fragOrder[0]);\n        this._fragOrder[0] = ninds;\n\n        //We only set this when the fragment index goes\n        //beyond the initial fragment size -- assuming\n        //that the initial bounds passed into the RenderQueue constructor\n        //is valid for the initial fragment list.\n        this.visibleBoundsDirty = true;\n      }\n      //Note: this assumes trivial ordering\n      //We cannot set/add meshes if reordering of the indices has already happened.\n      //This is OK, because trivial ordering with unknown initial fragment count\n      //happens only for 2D models where we preserve trivial draw order anyway.\n      this._fragOrder[0][fragId] = fragId;\n\n\n      //Find a parent for the mesh -- in the case of SVF\n      //fragments we just map fragment index to increasing\n      //scene index, since fragments are already ordered\n      //in the way we want to draw them\n      var sceneIndex = Math.floor(fragId / this._fragsPerScene);\n      if (this._geomScenes) {\n        var scene = this._geomScenes[sceneIndex];\n        if (!scene || scene.isSecondPass) {\n          // Note that it's okay that the batch may also reference fragments that were not added yet. \n          // The RenderBatch does not require all fragments to be in memory already.\n          scene = new this._RenderBatch(this._frags, this._fragOrder, sceneIndex * this._fragsPerScene, this._fragsPerScene);\n\n          if (this._secondPassIndex === null) {\n            this._geomScenes[sceneIndex] = scene;\n          } else {\n            // If we are already using a second pass, need to add this new scene as well. This will most probably\n            // rarely happen, but this should cover that case anyway.\n            this.insertSceneToSecondPass(sceneIndex, scene);\n          }\n        }\n        // Did scene get set reasonably?\n        if (scene) {\n          // Notify batch about new fragment, so that the batch updates internal state like summed bbox and material sorting\n          scene.onFragmentAdded(fragId);\n          if (this._secondPassIndex !== null) {\n            this._geomScenes[this._secondPassIndex + sceneIndex].onFragmentAdded(fragId);\n          }\n        }\n      }\n    } }, { key: \"insertSceneToSecondPass\", value: function insertSceneToSecondPass(\n\n    sceneIndex, scene) {\n      // The two passes are located one after the other in geomScenes, to keep the iterator logic simple.\n      // That means that if we need to add a scene, we first split the two passes, insert the scene into\n      // each pass, and join them again.\n      // This makes no assumption where in the array the scene is added. The only assumption is that the two\n      // passes are in sync, that is, they are of the same length.\n      var firstPassScenes = this._geomScenes.slice(0, this._secondPassIndex);\n      var secondPassScenes = this._geomScenes.slice(this._secondPassIndex);\n\n      firstPassScenes[sceneIndex] = scene;\n      secondPassScenes[sceneIndex] = this.cloneForSecondPass(scene);\n      this._secondPassIndex = firstPassScenes.length;\n      this._geomScenes = firstPassScenes.concat(secondPassScenes);\n    }\n\n    // restart iterator\n  }, { key: \"reset\", value: function reset(frustum, camera) {\n      this._currentScene = 0;\n      if (this._is2d && this._geomScenes[0]) {\n        this._geomScenes[0].drawEnd = 0;\n        if (this._secondPassIndex !== null) {\n          this._geomScenes[this._secondPassIndex].drawEnd = 0;\n        }\n      }\n\n      if (this._resetVisStatus) {\n        var scenes = this._geomScenes;\n        var len = scenes.length;\n        for (var i = 0; i < len; ++i) {\n          var scene = scenes[i];\n          if (scene && scene.resetVisStatus) {\n            scene.resetVisStatus();\n          }\n        }\n        this._resetVisStatus = false;\n      }\n    } }, { key: \"getSceneCount\", value: function getSceneCount()\n\n    {\n      return this._geomScenes.length;\n    } }, { key: \"getGeomScenes\", value: function getGeomScenes()\n\n    {\n      return this._geomScenes;\n    } }, { key: \"resetVisStatus\", value: function resetVisStatus()\n\n    {\n      this._resetVisStatus = true;\n    } }, { key: \"done\", value: function done()\n\n    {\n      // If we are filling f2d batches, then we aren't done until the model is loaded\n      if (this._is2d && !this._model.isLoadDone())\n      return false;\n      // Once the model is loaded, we are done when the last batch is drawn\n      var res;\n      return this._currentScene >= this._geomScenes.length - 1 && (\n      !(res = this._geomScenes[this._currentScene]) || res.drawStart >= res.lastItem);\n    } }, { key: \"nextBatch\",\n\n    // Returns the next RenderBatch from _geomScenes or null when reaching the end.\n    value: function nextBatch() {\n      if (this._currentScene >= this.getSceneCount())\n      return null;\n\n      // As long as fragments are added in order of increasing id, res will never be null.\n      var res = this._geomScenes[this._currentScene];\n\n      if (!this._is2d) {\n        // Render importance is used to decide what to render next when using progressive rendering with multiple models. (see RenderScene.renderSome)\n        // For linear iterator, is treated as equally important.\n        res.renderImportance = 0;\n        ++this._currentScene;\n      } else {\n        var needsTwoPasses = this.areTwoPassesNeeded();\n        // 2D scene, so we only want to proceed to the next batch when this current batch is filled.\n        if (res.lastItem >= res.start + res.count) {\n          ++this._currentScene;\n          if (this._geomScenes[this._currentScene])\n          this._geomScenes[this._currentScene].drawEnd = this._geomScenes[this._currentScene].start;\n        }\n        res.drawStart = res.drawEnd;\n        res.drawEnd = res.lastItem;\n        if (res.hasOwnProperty(\"drawStart\") && res.lastItem <= res.drawStart) {\n          var isEndOfFirstPass = needsTwoPasses && !this._isSecondPass;\n          if (isEndOfFirstPass) {\n            // Start the second pass\n            this._currentScene = this._secondPassIndex;\n            return this.nextBatch();\n          }\n          return null; // all object in the batch have been drawn\n        }\n\n        // For the first pass change it to a large number to make sure it's rendered before 3D models (fixes transparency issues when mixing 2D/3D models)\n        // For the second pass, set it to -1, so it's rendered after 3D models that are being loaded, since those also use the linear iterator and set\n        // the importance to 0.\n        var renderLast = !this._model.areAllVisible() || this._isSecondPass; // When the whole page is ghosted also render last\n        res.renderImportance = renderLast ? -1.0 : 1e20;\n        res.needsTwoPasses = needsTwoPasses;\n      }\n\n      return res;\n    } }, { key: \"areTwoPassesNeeded\", value: function areTwoPassesNeeded()\n\n    {\n      // Currently used only for paper transparency.\n      // Could be expanded for any case with transparency.\n      var needsTwoPasses = this._model.hasPaperTransparency();\n      if (needsTwoPasses && this._secondPassIndex === null) {\n        // Add the second pass scenes only when deemed necessary\n        this.addSecondPassScenes();\n      }\n\n      this._isSecondPass = !!(needsTwoPasses && this._currentScene >= this._secondPassIndex);\n\n      return needsTwoPasses;\n    } }, { key: \"cloneForSecondPass\", value: function cloneForSecondPass(\n\n    scene) {\n      if (!scene) return;\n\n      var clone = scene.clone();\n      clone.isSecondPass = true;\n      return clone;\n    } }, { key: \"addSecondPassScenes\", value: function addSecondPassScenes()\n\n    {\n      var numScenes = this._geomScenes.length;\n      if (!numScenes) {\n        return;\n      }\n\n      this._geomScenes = this._geomScenes.concat(this._geomScenes.map(this.cloneForSecondPass));\n      this._secondPassIndex = numScenes;\n    }\n\n    // Computes the summed bboxes of all batches of the iterator and writes them to the out params:\n    // - visibleBounds:           instanceof THREE.Box3, bbox of all fragments excluding the ghosted ones.\n    // - visibleBoundsWithHidden: instanceof THREE.Box3, bbox of all fragments \n    //\n    // [HB:] BBoxes are computed without considering MESH_HIDE flag in any way, see RenderBatch.calculateBounds(). Is this intended?\n  }, { key: \"getVisibleBounds\", value: function getVisibleBounds(visibleBounds, visibleBoundsWithHidden) {\n\n      //Case where we are not using BVH\n\n      var len = this.getSceneCount();\n      for (var i = 0; i < len; i++) {\n\n        // make sure that the bboxes of the batch is up-to-date\n        this._geomScenes[i].calculateBounds();\n\n        // sum up bbox of fragments excluding ghosted\n        var bb = this._geomScenes[i].getBoundingBox();\n        visibleBounds.union(bb);\n\n        // sum up bbox of all fragments\n        visibleBoundsWithHidden.union(bb);\n        visibleBoundsWithHidden.union(this._geomScenes[i].getBoundingBoxHidden());\n\n      }\n    }\n\n    // Perform raycast on all batches. See RenderBatch.raycast() for params.\n  }, { key: \"rayCast\", value: function rayCast(raycaster, intersects, dbIdFilter) {\n      var len = this.getSceneCount();\n      for (var i = 0; i < len; i++) {\n        this._geomScenes[i].raycast(raycaster, intersects, dbIdFilter);\n      }\n    } }]);return ModelIteratorLinear;}();","import { VBIntersector } from './VBIntersector';\nimport { FrustumIntersector } from './FrustumIntersector';\nimport { MeshFlags } from \"./MeshFlags\";\nimport { RenderFlags } from \"./RenderFlags\";\nimport { logger } from \"../../logger/Logger\";\nimport { LmvBox3 as Box3 } from './LmvBox3';\n\n\nvar _tmpBox = new Box3();\nvar _depths = null;\n\n/**\n                     * Represents a subset of objects from a larger list, for e.g. a draw call batch\n                     * to send to the renderer. It's like a small view into an ordered FragmentList.\n                     *\n                     * frags     -- FragmentList of all available meshes (1:1 correspondance with LMV fragments)\n                     * fragOrder -- Array of indices, pointing into the array of fragments\n                     * start     -- start index in the array of indices\n                     * count     -- how many mesh indices (after start index) are contained in the subset.\n                     * @constructor\n                     */\nexport function RenderBatch(frags, fragOrder, start, count) {\n\n  this.frags = frags;\n  this.indices = fragOrder; // may be a typed array (usually, Int32Array) or generic Array containing \n  // the actual typed array in index 0, see getIndices(). May be null, which means indices[i]==i.\n  this.start = start;\n  this.count = count;\n  this.lastItem = start; // Defines the (exclusive) range end used in this.forEach(). If a batch is complete, i.e. all fragments are added, \n  // we usually have this.lastItem = this.start + this.count. But it may be smaller if dynamic adding is being used.\n  // The final value of this.lastItem is set from outside by the creator (see e.g., ModelIteratorLinear or ModelIteratorBVH)\n  // NOTE: this.lastItem must be set before this.forEach() has any effect.\n\n  //Compatibility with THREE.Scene. Optional override material (instanceof THREE.ShaderMaterial) temporarily used by renderers.\n  this.overrideMaterial = null;\n\n  //Whether sort by material ID has been done\n  this.sortDone = false;\n  this.numAdded = 0; // number of added batches since last material sort\n\n  this.avgFrameTime = undefined; // Average time spent for rendering this batch. Maintained externally by RenderScene.renderSome()\n\n  this.nodeIndex = undefined; // Optional: Unique index of this RenderBatch (used by modelIteratorBVH/ConsolidationIterator)\n\n  // Summed worldBoxes\n  // First 6 terms are the visible bounds, second 6 terms are the hidden bounds\n  this.bboxes = new Array(12);\n  this.bboxes[0] = this.bboxes[1] = this.bboxes[2] = Infinity;\n  this.bboxes[3] = this.bboxes[4] = this.bboxes[5] = -Infinity;\n  this.bboxes[6] = this.bboxes[7] = this.bboxes[8] = Infinity;\n  this.bboxes[9] = this.bboxes[10] = this.bboxes[11] = -Infinity;\n\n\n  //Tells the renderer whether to sort by Z before drawing.\n  //We only set this for RenderBatches containing transparent objects.\n  this.sortObjects = false;\n\n  this.sortDone = false;\n  this.sortByShaderDone = false;\n\n  //Tells the renderer whether to do per-mesh frustum culling.\n  //In some cases when we know the whole batch is completely\n  //contained in the viewing frustum, we turn this off.\n  this.frustumCulled = true;\n\n  //Used by ground shadow code path\n  this.forceVisible = false;\n\n  // FragmentList do not always contain THREE.Meshes for each shape. They may also just contain plain BufferGeometry \n  // and THREE.ShaderMaterial. In this case, the renderer must handle the this batch using immediate mode rendering.\n  // (see FragmentList.getVizmesh() and WebGLRenderer.render() for details)\n  this.renderImmediate = !frags.useThreeMesh;\n\n  //Set per frame during scene traversal\n  this.renderImportance = 0.0;\n}\n\nRenderBatch.prototype.clone = function () {\n  var renderBatch = new RenderBatch(this.frags, this.indices, this.start, this.count);\n  renderBatch.sortDone = this.sortDone;\n  renderBatch.sortByShaderDone = this.sortByShaderDone;\n  renderBatch.lastItem = this.lastItem;\n  renderBatch.visibleStats = this.visibleStats;\n  renderBatch.numAdded = this.numAdded;\n  renderBatch.bboxes = this.bboxes.slice();\n\n  return renderBatch;\n};\n\nRenderBatch.prototype.getIndices = function () {\n  // Note that isArray returns false for typed arrays like Int32Array.\n  // isArray() is used to here to check whether indices is\n  //  a) a typed array itself or\n  //  b) a generic array containing the actual typed array in index 0.\n  return Array.isArray(this.indices) ? this.indices[0] : this.indices;\n};\n\n// Sorts \nRenderBatch.prototype.sortByMaterial = function () {\n\n  //Render batch must be complete before we can sort it\n  if (this.numAdded < this.count)\n  return;\n\n  var frags = this.frags;\n  var indices = this.getIndices();\n\n  if (!indices) {\n    logger.warn(\"Only indexed RenderSubsets can be sorted.\");\n    return;\n  }\n\n  // apply sort only to the range used by this batch\n  var tmp = indices.subarray(this.start, this.start + this.count);\n  Array.prototype.sort.call(tmp, function (a, b) {\n    var ma = frags.getMaterialId(a);\n    var mb = frags.getMaterialId(b);\n\n    if (ma === undefined)\n    return mb ? 1 : 0;\n    if (mb === undefined)\n    return -1;\n\n    return ma - mb;\n  });\n\n  //indices.set(tmp, this.start); // not needed because tmp already points to the same buffer\n\n  // indicate that indices are sorted by material and no batches have beend added since then.\n  this.numAdded = 0;\n  this.sortDone = true;\n};\n\n//Sorts meshes in the render batch by shader ID, to avoid\n//unnecessary shader switching in the renderer when looping over a batch.\n//This can only be performed once the RenderBatch is full/complete and\n//all shaders are known.\nRenderBatch.prototype.sortByShader = function () {\n\n  //Render batch must be complete before we can sort it\n  if (!this.sortDone || this.sortByShaderDone)\n  return;\n\n  var frags = this.frags;\n  var indices = this.getIndices();\n\n  var tmp = indices.subarray(this.start, this.start + this.count);\n\n  Array.prototype.sort.call(tmp, function (a, b) {\n    var ma = frags.getMaterial(a);\n    var mb = frags.getMaterial(b);\n\n    var pd = ma.program.id - mb.program.id;\n    if (pd)\n    return pd;\n\n    return ma.id - mb.id;\n  });\n\n  //indices.set(tmp, this.start);\n\n  this.numAdded = 0;\n  this.sortByShaderDone = true;\n};\n\n\n// Sorts this.indices by increasing depth for the current view.\n// Input: frustumIn instanceof FrustumIntersector\nRenderBatch.prototype.sortByDepth = function (frustumIn) {\n\n  var frags = this.frags;\n  var indices = this.getIndices();\n  var frustum = frustumIn;\n  var bbox = _tmpBox;\n\n  if (!indices) {\n    logger.warn(\"Only indexed RenderSubsets can be sorted.\");\n    return;\n  }\n\n  // allocate this.depth to store a depth value for each fragment index in indicesView\n  if (!_depths || _depths.length < this.count)\n  _depths = new Float32Array(this.count);\n\n  var depths = _depths;\n  var start = this.start;\n\n  // For each fragId indicesView[i], compute the depth and store it in depth[i]\n  this.forEachNoMesh( // use frustum to calculate depth per fragment\n  function calcDepth(fragId, i) {\n    if (!frags.getGeometry(fragId))\n    depths[i] = -Infinity;else\n    {\n      frags.getWorldBounds(fragId, bbox);\n      depths[i] = frustum.estimateDepth(bbox);\n    }\n  });\n\n\n  // Does not work, this call sorts on depths[indicesViews[i]], not depths[i],\n  // where 'i' is an index into both the depths and indicesViews lists.\n  //Array.prototype.sort.call(this.indicesView, sortCB);\n\n  // Insertion sort appears to be about 7x or more faster\n  // for lists of 64 or less objects vs. defining a sort() function.\n  // Asking if there's a faster way. Traian mentioned quicksort > 8\n  // objects; I might give this a try.\n  var tempDepth, tempIndex;\n  for (var j = 1; j < this.count; j++) {\n    var k = j;\n    while (k > 0 && depths[k - 1] < depths[k]) {\n\n      // swap elem at position k one position backwards (for indices and depths)\n      tempDepth = depths[k - 1];\n      depths[k - 1] = depths[k];\n      depths[k] = tempDepth;\n\n      tempIndex = indices[start + k - 1];\n      indices[start + k - 1] = indices[start + k];\n      indices[start + k] = tempIndex;\n\n      k--;\n    }\n  }\n\n  //indices.set(this.indicesView, this.start); // Not needed because indicesView is already a view into this range\n};\n\n//Adds the given THREE.Box3 to the renderBatch bounding box or hidden object bounding box\nRenderBatch.prototype.addToBox = function (box, hidden) {\n  var offset = hidden ? 6 : 0;\n  var bb = this.bboxes;\n  bb[0 + offset] = Math.min(bb[0 + offset], box.min.x);\n  bb[1 + offset] = Math.min(bb[1 + offset], box.min.y);\n  bb[2 + offset] = Math.min(bb[2 + offset], box.min.z);\n\n  bb[3 + offset] = Math.max(bb[3 + offset], box.max.x);\n  bb[4 + offset] = Math.max(bb[4 + offset], box.max.y);\n  bb[5 + offset] = Math.max(bb[5 + offset], box.max.z);\n};\n\nRenderBatch.prototype.getBoundingBox = function (dst) {\n  dst = dst || _tmpBox;\n  var bb = this.bboxes;\n  dst.min.x = bb[0];\n  dst.min.y = bb[1];\n  dst.min.z = bb[2];\n\n  dst.max.x = bb[3];\n  dst.max.y = bb[4];\n  dst.max.z = bb[5];\n\n  return dst;\n};\n\nRenderBatch.prototype.getBoundingBoxHidden = function (dst) {\n  dst = dst || _tmpBox;\n  var bb = this.bboxes;\n  var offset = 6;\n  dst.min.x = bb[0 + offset];\n  dst.min.y = bb[1 + offset];\n  dst.min.z = bb[2 + offset];\n\n  dst.max.x = bb[3 + offset];\n  dst.max.y = bb[4 + offset];\n  dst.max.z = bb[5 + offset];\n\n  return dst;\n};\n\n//Use only for incremental adding to linearly ordered (non-BVH) scenes!\nRenderBatch.prototype.onFragmentAdded = function () {\n\n  return function (fragId) {\n\n    // update bbox\n    this.frags.getWorldBounds(fragId, _tmpBox);\n    this.addToBox(_tmpBox, false);\n\n    // mark \n    this.sortDone = false;\n\n    //NOTE: This only works with trivial fragment ordering (linear render queues).\n    //Otherwise the item index does not necessarily match the fragId due to the \n    //reordering jump table (this.indices).\n    if (this.lastItem <= fragId) {\n      this.lastItem = fragId + 1;\n      if (this.visibleStats !== undefined)\n      this.visibleStats = 0; // reset visibility, since a new fragment might change it\n      this.numAdded++;\n    }\n  };\n}();\n\n\n/**\n      * Iterates over fragments.\n      * @param {function} callback - function(mesh, id) called for each fragment geometry.\n      *      - mesh: instanceof THREE.Mesh (as obtained from FragmentList.getVizmesh)\n      *      - id:   fragment id\n      * @param {number} drawMode - Optional flag (see FragmentList.js), e.g., MESH_VISIBLE. If specified, we only traverse fragments for which this flag is set.\n      * @param {bool} includeEmpty - Default: false, i.e. fragments are skipped if they have no mesh available via getVizmesh().\n      */\nRenderBatch.prototype.forEach = function (callback, drawMode, includeEmpty) {\n\n  var indices = this.getIndices();\n\n  var frags = this.frags;\n  var sortByShaderPossible = !this.sortByShaderDone;\n\n  //var showPF = (frags.showPF === undefined ) ? -1 : frags.showPF;\n\n  //If the most likely rendering flags are true, use a shortened version of the for-loop.\n  var i, iEnd, idx, m;\n  if (!drawMode && !includeEmpty && !sortByShaderPossible) {\n    for (i = this.start, iEnd = this.lastItem; i < iEnd; i++) {\n      idx = indices ? indices[i] : i;\n\n      // for debug only, if the PF is to be displayed, then check if this fragment is in the designated PF\n      //if ((showPF !== -1) && (showPF !== frags.fragments.packIds[idx])) {\n      //    continue;\n      //}\n\n      var m = frags.getVizmesh(idx);\n\n      if (m && m.geometry) {\n        callback(m, idx);\n      }\n    }\n  } else {\n    for (i = drawMode === MeshFlags.MESH_RENDERFLAG && this.hasOwnProperty(\"drawStart\") ? this.drawStart : this.start, iEnd = this.lastItem; i < iEnd; i++) {\n      idx = indices ? indices[i] : i;\n\n      // for debug only, if the PF is to be displayed, then check if this fragment is in the designated PF\n      //if ((showPF !== -1) && (showPF !== frags.fragments.packIds[idx])) {\n      //    continue;\n      //}\n\n      var m = frags.getVizmesh(idx);\n\n      if (sortByShaderPossible && (!m || !m.material || !m.material.program || m.geometry_proxy))\n      sortByShaderPossible = false;\n\n      // if drawMode is given, iterate vizflags that match\n      if ((includeEmpty || m && m.geometry) && (\n      !drawMode || frags.isFlagSet(idx, drawMode))) {\n\n        callback(m, idx);\n      }\n    }\n  }\n\n  //If all materials shaders are already available, we can sort by shader\n  //to minimize shader switches during rendering.  This sort will only\n  //execute once and changing materials later will break the sorted order again.\n  if (sortByShaderPossible)\n  this.sortByShader();\n};\n\n/**\n    * Iterates over fragments. Like forEach(), but takes a different callback.\n    * @param {function} callback - function(fragId, idx) called for each fragment geometry.\n    *      - fragId:   fragment id\n    *      - idx:      running index from 0 .. (lastItem-start)\n    * @param {number} drawMode - Optional flag (see FragmentList.js), e.g., MESH_VISIBLE. If specified, we only traverse fragments for which this flag is set.\n    * @param {bool} includeEmpty - Default: false, i.e. fragments are skipped if they have no mesh available via getVizmesh().\n    */\nRenderBatch.prototype.forEachNoMesh = function (callback, drawMode, includeEmpty) {\n\n  var indices = this.getIndices();\n  var frags = this.frags;\n\n  for (var i = this.start, iEnd = this.lastItem; i < iEnd; i++) {\n    var fragId = indices ? indices[i] : i;\n\n    // get geometry - in this case just to check if it is available\n    var geometry;\n    if (frags.useThreeMesh) {\n      var m = frags.getVizmesh(fragId);\n      if (m)\n      geometry = m.geometry;\n    } else\n    {\n      geometry = frags.getGeometry(fragId);\n    }\n\n    // if drawMode is given, iterate vizflags that match\n    if ((includeEmpty || geometry) && (\n    !drawMode || frags.isFlagSet(fragId, drawMode))) {\n\n      callback(fragId, i - this.start);\n    }\n  }\n};\n\n/**\n    * Checks if given ray hits a bounding box of any of the fragments.\n    * @param {THREE.RayCaster} raycaster\n    * @param {Object[]}        intersects - An object array that contains intersection result objects.\n    *                                       Each result r stores properties like r.point, r.fragId, r.dbId. (see VBIntersector.js for details)\n    * @param {number[]}       [dbIdFilter] - Array of dbIds. If specieed, only fragments with dbIds inside the filter are checked.\n    */\nRenderBatch.prototype.raycast = function () {\n\n  return function (raycaster, intersects, dbIdFilter) {\n\n    //Assumes bounding box is up to date.\n    if (raycaster.ray.isIntersectionBox(this.getBoundingBox()) === false)\n    return;\n\n    var self = this;\n    var tmpBox = _tmpBox;\n\n    // traverse all visible meshes\n    this.forEach(function (m, fragId) {\n\n      // Don't intersect hidden objects\n      if (self.frags.isFlagSet(fragId, MeshFlags.MESH_HIDE))\n      return;\n\n      //Check the dbIds filter if given\n      if (dbIdFilter && dbIdFilter.length) {\n        //Theoretically this can return a list of IDs (for 2D meshes)\n        //but this code will not be used for 2D geometry intersection.\n        var dbId = 0 | self.frags.getDbIds(fragId);\n\n        //dbIDs will almost always have just one integer in it, so\n        //indexOf should be fast enough.\n        if (dbIdFilter.indexOf(dbId) === -1)\n        return;\n      }\n\n      // raycast worldBox first.\n      self.frags.getWorldBounds(fragId, tmpBox);\n\n      // Expand bounding box a bit, to take into account axis aligned lines\n      tmpBox.expandByScalar(0.5);\n\n      if (raycaster.ray.isIntersectionBox(tmpBox)) {\n        // worldbox was hit. do raycast with actucal geometry.\n        VBIntersector.rayCast(m, raycaster, intersects);\n      }\n    }, MeshFlags.MESH_VISIBLE);\n  };\n}();\n\n/**\n      * Computes/updates the bounding boxes of this batch.\n      */\nRenderBatch.prototype.calculateBounds = function () {\n\n  // pointers to make some objects available for the callback below.\n  var vizflags;\n  var frags;\n  var tmpBox;\n  var self;\n\n  // adds box of a fragment to bounds or bounds, depennding on its vizflags.\n  function cb(fragId) {\n\n    frags.getWorldBounds(fragId, tmpBox);\n\n    var f = vizflags[fragId];\n\n    self.addToBox(tmpBox, !(f & 1 /*MESH_VISIBLE*/));\n  }\n\n  return function () {\n    // init boxes for visible and ghosted meshes\n    this.bboxes[0] = this.bboxes[1] = this.bboxes[2] = Infinity;\n    this.bboxes[3] = this.bboxes[4] = this.bboxes[5] = -Infinity;\n    this.bboxes[6] = this.bboxes[7] = this.bboxes[8] = Infinity;\n    this.bboxes[9] = this.bboxes[10] = this.bboxes[11] = -Infinity;\n\n    // make members and tempBox accessible for cb\n    vizflags = this.frags.vizflags;\n    frags = this.frags;\n    tmpBox = _tmpBox;\n    self = this;\n\n    // Why including null geometry?: If we would exclude fragments whose geometry is not loaded yet, we would need to refresh all bboxes permanently during loading.\n    // Since we know bboxes earlier than geometry (for SFF at FragmentList construction time and for Otg as soon as BVH data is available), including empty meshes\n    // ensures that the bbox result is not affected by geometry loading state for 3D.\n    this.forEachNoMesh(cb, 0, true);\n  };\n}();\n\n/**\n      * Sets the MESH_RENDERFLAG for a single fragment, depeneding on the drawMode and the other flags of the fragment.\n      * @param {number} drawMode - One of the modes defined in RenderFlags.js, e.g. RENDER_NORMAL\n      * @param {number} vizflags - vizflags bitmask. \n      * @param {number} idx - index into vizflags, for which we want to determine the MESH_RENDERFLAG.\n      * @param {bool} hideLines\n      * @param {bool} hidePoints\n      * @returns {bool} Final, evaluated visibility.\n      */\nfunction evalVisibility(drawMode, vizflags, idx, hideLines, hidePoints) {\n\n  var v;\n  // Strange bug in MS Edge when the debugger is active. Down below where we\n  // or in the MESH_RENDERFLAG, ~MESH_RENDERFLAG was getting used in stead.\n  // Copying the value to a local variable fixed the issue.\n  var rflag = MeshFlags.MESH_RENDERFLAG;\n  var vfin = vizflags[idx] & ~rflag;\n  switch (drawMode) {\n\n    case RenderFlags.RENDER_HIDDEN:\n      v = !(vfin & MeshFlags.MESH_VISIBLE); //visible (bit 0 on)\n      break;\n    case RenderFlags.RENDER_HIGHLIGHTED:\n      v = vfin & MeshFlags.MESH_HIGHLIGHTED; //highlighted (bit 1 on)\n      break;\n    default:\n      v = (vfin & (MeshFlags.MESH_VISIBLE | MeshFlags.MESH_HIGHLIGHTED | MeshFlags.MESH_HIDE)) == 1; //visible but not highlighted, and not a hidden line (bit 0 on, bit 1 off, bit 2 off)\n      break;}\n\n\n  if (hideLines) {\n    var isLine = vfin & (MeshFlags.MESH_ISLINE | MeshFlags.MESH_ISWIDELINE);\n    v = v && !isLine;\n  }\n\n  if (hidePoints) {\n    var isPoint = vfin & MeshFlags.MESH_ISPOINT;\n    v = v && !isPoint;\n  }\n\n  //Store evaluated visibility into bit 7 of the vizflags\n  //to use for immediate rendering\n  vizflags[idx] = vfin | (v ? rflag : 0);\n\n  return v;\n}\n\n\n/**\n   * Checks if fragment is outside the frustum.\n   * @param {bool} checkCull - indicates if culling is enabled. If false, return value is always false.\n   * @param {FrustumIntersector} frustum\n   * @param {FragmentList} frags\n   * @param {number} idx - index into frags.\n   * @param {bool} doNotCut - do not apply cutplanes\n   * @returns {bool} True if the given fragment is outside the frustum and culling is enabled.\n   */\nfunction evalCulling(checkCull, frustum, frags, idx, doNotCut) {\n\n  var culled = false;\n\n  frags.getWorldBounds(idx, _tmpBox);\n  if (checkCull && !frustum.intersectsBox(_tmpBox)) {\n    culled = true;\n  }\n\n  // apply cutplane culling\n  // TODO: We ignore checkCull, because checkCull is set to false if the RenderBatch is fully\n  //       inside the frustum - which still tells nothing about the cutplanes.\n  //       Ideally, we should a corresponding hierarchical check per cutplane too.\n  if (!culled && !doNotCut && frustum.boxOutsideCutPlanes(_tmpBox)) {\n    culled = true;\n  }\n\n  //This code path disabled because it was found to slow things down overall.\n  /*\n  else {\n      // Check whether the projected area is smaller than a threshold,\n      // if yes, do not render it.\n      var area = frustum.projectedBoxArea(_tmpBox, !checkCull);\n      area *= frustum.areaConv;\n      if (area < frustum.areaCullThreshold) {\n          culled = true;\n      }\n  }\n  */\n\n  return culled;\n}\n\n\n/**\n   * Updates visibility for all fragments of this RenderBatch. \n   * This means:\n   *  1. It returns true if all meshes are hidden (false otherwise)\n   *\n   *  2. If the whole batch box is outside the frustum, nothing else is done.\n   *     (using this.getBoundingBox() or this.getBoundingBoxHidden(), depending on drawMode)\n   *\n   *  3. For all each checked fragment with fragId fid and mesh m, the final visibility is stored...\n   *      a) In the m.visible flag.\n   *      b) In the MESH_RENDERFLAG of the vizflags[fid]\n   *     This is only done for fragments with geometry.   \n   * @param {number} drawMode - One of the modes defined in RenderFlags.js, e.g. RENDER_NORMAL\n   * @param {FrustumIntersector} frustum\n   * @returns {bool} True if all meshes are hidden (false otherwise).\n   */\nRenderBatch.prototype.applyVisibility = function () {\n\n  var frags, vizflags, frustum, drawMode, checkCull, allHidden, doNotCut;\n\n  // Callback to apply visibility for a single fragment\n  //\n  // Input: Geometry and index of a fragment, i.e.\n  //  m:   instanceof THREE.Mesh (see FragmentList.getVizmesh). May be null.\n  //  idx: index of the fragment in the fragment list. \n  //\n  // What is does:\n  //  1. bool m.visible is updated based on flags and frustum check (if m!=null)\n  //  2. The MESH_RENDERFLAG flag is updated for this fragment, i.e., is true for meshes with m.visible==true\n  //  3. If there is no geometry and there is a custom callback (checkCull) \n  //  4. Set allHidden to false if any mesh passes as visible.\n  function applyVisCB(m, idx) {\n\n    // if there's no mesh or no geometry, just call the custom callback.\n    // [HB:] I think it would be clearer to remove the frags.useThreeMesh condition here.\n    //       It's not really intuitive that for (m==0) the callback is only called for frags.useThreeMesh.\n    //       Probably the reason is just that this code section has just been implemented for the useThreeMesh\n    //       case and the other one was irrelevant.\n    if (!m && frags.useThreeMesh || !m.geometry) {\n      return;\n    }\n\n    // apply frustum check for this fragment\n    var culled = evalCulling(checkCull, frustum, frags, idx, doNotCut);\n\n    // if outside, set m.visbile and the MESH_RENDERFLAG of the fragment to false\n    if (culled) {\n      if (m) {\n        m.visible = false;\n      } else {\n        logger.warn(\"Unexpected null mesh\");\n      }\n      // unset MESH_RENDERFLAG\n      vizflags[idx] = vizflags[idx] & ~MeshFlags.MESH_RENDERFLAG;\n\n      return;\n    }\n\n    // frustum check passed. But it might still be invisible due to vizflags and/or drawMode. \n    // Note that evalVisibility also updates the MESH_RENDERFLAG already.\n    var v = evalVisibility(drawMode, vizflags, idx, frags.linesHidden, frags.pointsHidden);\n\n    if (m)\n    m.visible = !!v;\n\n    // Set to false if any mesh passes as visible\n    allHidden = allHidden && !v;\n  }\n\n  // Similar to applyVisCB above, but without geometry param, so that we don't set any m.visible property.\n  function applyVisCBNoMesh(idx) {\n\n    // if no geometry is assigned, just call custom cb (if specified) and stop here.\n    if (!frags.getGeometryId(idx)) {\n      return;\n    }\n\n    // apply frustum check for this fragment\n    var culled = evalCulling(checkCull, frustum, frags, idx, doNotCut);\n\n    // if culled, set visflags MESH_RENDERFLAG to false \n    if (culled) {\n      vizflags[idx] = vizflags[idx] & ~MeshFlags.MESH_RENDERFLAG;\n      return;\n    }\n\n    // frustum check passed. But it might still be invisible due to vizflags and/or drawMode. \n    // Note that evalVisibility also updates the MESH_RENDERFLAG already.\n    var v = evalVisibility(drawMode, vizflags, idx, frags.linesHidden, frags.pointsHidden);\n\n    // Set to false if any mesh passes as visible\n    allHidden = allHidden && !v;\n  }\n\n  return function (drawModeIn, frustumIn) {\n\n    //Used when parts of the same scene\n    //have to draw in separate passes (e.g. during isolate).\n    //Consider maintaining two render queues instead if the\n    //use cases get too complex, because this approach\n    //is not very scalable as currently done (it traverses\n    //the entire scene twice, plus the flag flipping for each item).\n\n    allHidden = true;\n    frustum = frustumIn;\n    drawMode = drawModeIn;\n\n    var bbox = drawMode === RenderFlags.RENDER_HIDDEN ? this.getBoundingBoxHidden() : this.getBoundingBox();\n\n    //Check if the entire render batch is contained inside\n    //the frustum. This will save per-object checks.\n    var containment = frustum.intersectsBox(bbox);\n    if (containment === FrustumIntersector.OUTSIDE)\n    return allHidden; //nothing to draw\n\n    doNotCut = this.frags.doNotCut;\n    if (!doNotCut && frustumIn.boxOutsideCutPlanes(bbox)) {\n      return allHidden;\n    }\n\n    vizflags = this.frags.vizflags;\n    frags = this.frags;\n    checkCull = containment !== FrustumIntersector.CONTAINS;\n\n    // The main difference between applyVisCB and applyVisCBNoMesh is that applyVisCB also updates mesh.visible for each mesh.\n    // This does only make sense when using THREE.Mesh. Otherwise, the mesh containers are volatile anyway (see FragmentList.getVizmesh)\n    if (!frags.useThreeMesh) {\n      // Use callback that does not set mesh.visible\n      this.forEachNoMesh(applyVisCBNoMesh, 0, false);\n    } else {\n      // Use callback that also sets mesh.visible.\n      // Skip fragments without geometry unless a custom callback is defined (fragIdCB)\n      this.forEach(applyVisCB, null);\n    }\n\n    frags = null;\n\n    return allHidden;\n  };\n}();","\nexport var RenderFlags = {\n  RENDER_NORMAL: 0,\n  RENDER_HIGHLIGHTED: 1,\n  RENDER_HIDDEN: 2,\n  RENDER_SHADOWMAP: 3,\n  RENDER_FINISHED: 4 };","import * as globals from '../globals';\nimport { GeometryList } from './GeometryList';\nimport { FragmentList } from './FragmentList';\nimport { RenderBatch } from './RenderBatch';\nimport { consolidateFragmentList } from './consolidation/FragmentListConsolidation';\nimport { ConsolidationIterator } from './consolidation/ConsolidationIterator';\nimport { ModelIteratorLinear } from './ModelIteratorLinear';\nimport { ModelIteratorBVH } from './ModelIteratorBVH';\nimport { VBIntersector } from './VBIntersector';\nimport * as THREE from \"three\";\nimport { MeshFlags } from \"./MeshFlags\";\nimport { RenderFlags } from \"./RenderFlags\";\nimport { logger } from \"../../logger/Logger\";\nimport { LmvMatrix4 } from \"./LmvMatrix4\";\nimport { DynamicGlobalOffset } from \"../../application/DynamicGlobalOffset\";\n\n// TODO: move the logic that decides whether or not to stream somewhere closer to SVF;\n// Ideally, RenderModel and GeometryList should be agnostic to the file format.\n/*\n * Helper function to determine whether we should enable streamingDraw or upload the whole model to GPU.\n *\n * This function uses values from an SVF package to estimate the expected GPU load. If it is\n * small enough, it returns false. This means that the whole model is uploaded to GPU.\n *\n * If the model size is larger or unknown, we use a heuristic to determine which models are uploaded\n * to GPU and which are rendered from CPU-memory using the (slower) streamingDraw.\n *  @param {number} packFileTotalSize\n *  @param {number} numPrimitives\n *  @param {number} numObjects\n */\nfunction needsStreamingDraw(packFileTotalSize, numPrimitives, numObjects) {\n  if (packFileTotalSize) {\n    //In pack files, primitive indices use 4 byte integers,\n    //while we use 2 byte integers for rendering, so make this\n    //correction when estimating GPU usage for geometry\n    var estimatedGPUMem = packFileTotalSize - numPrimitives * 3 * 2;\n\n    //If the model is certain to be below a certain size,\n    //we will skip the heuristics that upload some meshes to\n    //GPU and keep other in system mem, and just push it all to the GPU.\n    if (estimatedGPUMem <= globals.GPU_MEMORY_LIMIT && numObjects < globals.GPU_OBJECT_LIMIT) {\n      // We don't need streaming draw - model is small enough\n      return false;\n    }\n  }\n\n  return true;\n}\n\nvar isPointOutsidePlanecuts = function () {\n  var v = new THREE.Vector4();\n  return function (point, cutplanes) {\n    v.copy(point); // copy already sets w=1 when copying from a Vector3\n    for (var i = 0; i < cutplanes.length; i++) {\n      if (cutplanes[i].dot(v) > 1e-6) {\n        return true;\n      }\n    }\n\n    return false;\n  };\n}();\n\n// Counter to assign individual numbers to RenderModel in order of their creation\nvar nextModelId = 1;\n\n/** @class Extends application Model class by functionality for WebGL rendering.\n                      *         Currently produced by loaders (F2DLoader, SvfLoader)\n                      *\n                      *  @constructor\n                      */\nexport function RenderModel() {var _this = this;\n\n  // Cached bboxes.\n  var _visibleBounds = new THREE.Box3(); // excluding ghosted once\n  var _visibleBoundsWithHidden = new THREE.Box3(); // full bbox\n  var _tmpBox = new THREE.Box3(); // temp for internal use\n\n  this.visibleBoundsDirty = false; // triggers recomputation of _visibleBounds and _visibleBoundsWithHidden, e.g., if fragment visibility changes.\n  this.enforceBvh = false; // currently ignored, see this.resetIterator()\n\n  var _numHighlighted = 0; // number of currently highlighted fragments.    \n\n  this.id = nextModelId++; // use next free Model id\n\n  var _geoms = null; // {GeometryList} \n  var _frags = null; // {FragmentList}\n\n  // Iterators used for scene traversal. \n  var _linearIterator = null; // {ModelIteratorLinear}, used by default and created in this.initialize()\n  var _bvhIterator = null; // {ModelIteratorBVH},    used if setBVH() has been called and no new fragments have been added since then.\n  var _iterator = null; // currently used iterator. points to one of the iterators above\n\n  // Only used for consolidated models.\n  var _consolidationIterator = null; // {ConsolidationIterator}\n  var _consolidationMap = null; // cached intermediate results of consolidation pre-processing. Enables to quickly rebuild\n  // _consolidationIterator when we had to temporarily remove it to free memory.\n\n  // Maintained per scene traversal, initialized in ResetIterator()\n  var _renderCounter = 0; // number of batches rendered since last resetIterator() call. Used to indicate rendering progress for progressive rendering.\n  var _frustum = null; // {FrustumIntersector}. Assigned in this.ResetIterator(). Passed to RenderBatches for culling and depth-sorting. \n  var _drawMode = RenderFlags.RENDER_NORMAL; // drawMode used in this traversal. See Viewer3DImpl.js\n  var _bvhOn = false; // true when using _bvhiterator in the current traversal. [HB:] Shouldn't this better be local variable in ResetIterator()?\n\n  // Cache for transform matrices\n  var _identityMatrix = null; // {LmvMatrix4}\n  var _modelAndPlacementTransform = null; // {LmvMatrix4}\n  var _invModelAndPlacementTransform = null; // {LmvMatrix4}\n\n  // Dynamic Placement: These settings override the corresponding cameras and matrices in this.getData if placement or globalOffset are modified after loading.\n  //                    Only used if dynamic placement or offset changes are actually done. Note that placementTransform and globalOffset in this.getData always\n  //                    store the values applied during loading and are not affected by setGlobalOffset() or setPlacementTransform() calls.\n  this._placementTransform; // {LmvMatrix4}\n  this._globalOffset; // {Vector3}\n\n  // Note: GeometryList or FragmentList are maintained by the RenderModel and should not be modified from outside.\n  //       E.g., setting visibility or highlighting flags on FragmentList directly would break some state tracking. (e.g. see this.setVibility or this.setHighlighted)\n  //       The only current exception is done by loaders that add geometry to _geoms directly.\n  this.getGeometryList = function () {return _geoms;};\n  this.getFragmentList = function () {return _frags;};\n  this.getModelId = function () {return this.id;};\n  this.RenderBatch = RenderBatch; // This will be used by the model iterators\n  // to create batches. Limited memory will change it.\n\n  var _doNotCut = false; // When enabled, cutplanes should not affect the visibility of the model\n\n  this.initialize = function () {\n    // alloc GeometryList. Initially empty, but exposed via GetGeometryList().\n    // The loaders use this to add LmvGeometryBuffers directly to the GeometryList later.\n    // TODO: Make RenderModel agnostic to the SVF file format.\n    var svf = this.getData();\n\n    var numObjects = svf.numGeoms || 0;\n    var disableStreaming = !needsStreamingDraw(svf.packFileTotalSize, svf.primitiveCount, numObjects);\n    _geoms = new GeometryList(numObjects, this.is2d(), disableStreaming, this.isOTG());\n\n    _frags = new FragmentList(this);\n\n    var initialBbox = this.getBoundingBox();\n    if (initialBbox) {\n      _visibleBounds.copy(initialBbox);\n      _visibleBoundsWithHidden.copy(initialBbox);\n    }\n\n    _iterator = _linearIterator = new ModelIteratorLinear(this);\n  };\n\n  this.getIterator = function () {\n    return _iterator;\n  };\n\n  /**\n      * Initialize from custom iterator. In this case, _geoms and _frags are not used and the \n      * iterator implementation is responsible for producing and maintaining the geometry.\n      *\n      *  @param {ModelIterator} iterator - iterator.nextBatch may return RenderBatch or THREE.Scene instances.\n      *\n      * Note: When using a custom iterator, per-fragment visiblity is not supported.\n      */\n  this.initFromCustomIterator = function (iterator) {\n    _iterator = iterator;\n    this.visibleBoundsDirty = true; // make sure that bbox is obtained from iterator\n  };\n\n  /** \n      *  Deletes all GPU resources.\n      *\n      *  @param {FireflyWebGLRenderer} glRenderer\n      */\n  this.dtor = function (glrenderer) {\n    if (_frags) {\n      _frags.dispose(glrenderer);\n    }\n    // Custom iterators may have own GPU resources (see ModelIteratorTexQuad)\n    if (_iterator && _iterator.dtor) {\n      _iterator.dtor();\n      _linearIterator = null;\n    }\n    // If this model was consolidated, dispose GPU memory of consolidation as well\n    if (_consolidationIterator) {\n      _consolidationIterator.dispose();\n    }\n  };\n\n\n  /** \n      * Activating a fragment means:\n      *  - Store geometry in the FragmentList\n      *  - Update summed RenderModel boxes\n      *  - Add fragment to iterator, so that it is considered in next traversal\n      * See FragmentList.setMesh(..) for param details.\n      *\n      * Note:\n      *  - Can only be used with LinearIterator\n      */\n  this.activateFragment = function (fragId, meshInfo, overrideTransform) {\n    if (!_frags) {\n      return;\n    }\n\n    _frags.setMesh(fragId, meshInfo, overrideTransform);\n\n    //The linear iterator can be updated to add meshes incrementally.\n    //The BVH iterator is not mutable, yet.\n    _iterator.addFragment(fragId);\n\n    //update the world bbox\n    {\n      _frags.getWorldBounds(fragId, _tmpBox);\n      _visibleBounds.union(_tmpBox);\n      _visibleBoundsWithHidden.union(_tmpBox);\n    }\n\n  };\n\n  // Used by the Fusion collaboration client\n  this.setFragment = function (fragId, mesh, retainMesh) {\n\n    if (fragId === undefined)\n    fragId = this.getFragmentList().getNextAvailableFragmentId();\n\n    _frags.setMesh(fragId, mesh, true, retainMesh);\n\n    //The linear iterator can be updated to add meshes incrementally.\n    //The BVH iterator is not mutable, yet.\n    if (_linearIterator)\n    _linearIterator.addFragment(fragId);\n    if (_bvhIterator && !_frags.fragmentsHaveBeenAdded())\n    _bvhIterator.addFragment(fragId);\n\n    //update the world bbox\n    {\n      _frags.getWorldBounds(fragId, _tmpBox);\n      _visibleBounds.union(_tmpBox);\n      _visibleBoundsWithHidden.union(_tmpBox);\n    }\n\n    return fragId;\n  };\n\n\n  /** Replaces the default LinearIterator by a BVH iterator. */\n  this.setBVH = function (nodes, primitives, options) {var _frags2;\n\n    // Note that ResetIterator() might still set _iterator back to \n    // the linear one if the BVH one cannot be used.\n    _iterator = _bvhIterator = new ModelIteratorBVH();\n\n    _iterator.initialize(this, nodes, primitives, options);\n\n    // By default, the BVH contains boxes \"as loaded\", i.e. not consdering any model matrix.\n    // If a model transform is applied, we have to make sure that the bvh boxes are recomputed.\n    if ((_frags2 = _frags) === null || _frags2 === void 0 ? void 0 : _frags2.matrix) {\n      this.invalidateBBoxes();\n    }\n  };\n\n  /** \n      *  Starts the scene draw traversal, so that nextBatch() will return the first batch to render.\n      *   @param: {UnifiedCamera}      camera       - camera.position was needed for the heuristic to choose between linear iterator and BVH.\n      *                                               [HB:] The code is currently outcommented, so the param is currently unused.\n      *   @param: {FrustumIntersector} frustum      - used by RenderBatches for frustum culling and z-sorting.\n      *   @param: {number}             drawMode     - E.g., RENDER_NORMAL. See RenderFlags.js\n      */\n  this.resetIterator = function (camera, frustum, drawMode) {\n\n    //Decide whether to use the BVH for traversal\n    //If we are far out from the scene, use pure big-to-small\n    //importance order instead of front to back.\n    _bvhOn = false;\n    if (_bvhIterator && !_frags.fragmentsHaveBeenAdded()) {\n      //TODO: BVH always on when available, because the linear iteration\n      //does not respect transparent objects drawing last -- it just\n      //draws in the order the fragments come in the SVF package\n      /*\n          if(this.enforceBvh || !_linearIterator) {\n              _bvhOn = true;\n          } else {\n              var diag = _visibleBoundsWithHidden.size().length();\n              var center = _visibleBoundsWithHidden.center();\n              var dist = camera.position.distanceTo(center);\n              if (dist < diag * 0.5)\n                  _bvhOn = true;\n          }\n          */\n      _bvhOn = true;\n    }\n\n    // Note _linearIterator may also be null if a custom iterator is used.\n    // in this case, we must leave _iterator unchanged.\n    if (_bvhOn) {\n      _iterator = _bvhIterator;\n    } else if (_linearIterator) {\n      _iterator = _linearIterator;\n    }\n\n    _renderCounter = 0;\n    _drawMode = drawMode;\n    _frustum = frustum;\n    _iterator.reset(frustum, camera);\n\n    // notify consolidation iterator that a new traversal has started\n    if (_consolidationIterator) {\n      _consolidationIterator.reset();\n    }\n    return _iterator;\n  };\n\n\n  /** Returns the next RenderBatch for scene rendering travseral. Used in RenderScene.renderSome().\n      *   Use this.resetIterator() to start traversal first.\n      *\n      *   @returns {RenderBatch|null} Next batch to render or null if traversal is finished.\n      */\n  this.nextBatch = function () {\n\n    // If the next batch of the iterator is fully invisble, we inc it until we \n    // find a relevant batch to render or reach the end.\n    while (1) {\n      // get next batch from iterator\n      var scene = _iterator.nextBatch();\n\n      // update render progress counter\n      _renderCounter++;\n\n      // stop if iterator reached the end           \n      if (!scene)\n      return null;\n\n      // replace RenderBatch (= individual fragments) by consolidated scene, if available\n      if (_consolidationIterator && scene instanceof RenderBatch) {\n        scene = _consolidationIterator.consolidateNextBatch(scene, _frustum, _drawMode);\n      }\n\n      // Tag all produced scenes with modelId. This is used for cross-fading between models by\n      // rendering them to separate targets.\n      scene.modelId = this.id;\n\n      if (scene instanceof THREE.Scene) {\n        // The code for fragment visibility and sorting is only defined if scene is a RenderBatch.\n        // For the case of THREE.Scene, we are done here, because\n        //   - Sorting in THREE.Scene is done by FireFlyRenderer.\n        //   - Per-fragment visiblity is not supported in this case\n        return scene;\n      }\n\n      if (!this.applyVisibility(scene, _drawMode, _frustum))\n      return scene;\n    }\n  };\n\n  /**\n      * Set the MESH_RENDERFLAG based on the current render phase\n      * while frustum culling the fragments in the scene.\n      * @param {RenderBatch} scene The scene to calculate the visibility for\n      * @param {number}             drawMode     - E.g., RENDER_NORMAL. See RenderFlags.js\n      * @param {FrustumIntersector} frustum      - used by RenderBatches for frustum culling and z-sorting.\n      * @return {boolean} True if all fragments in the scene are not visibile. False otherwise.\n      */\n  this.applyVisibility = function (scene, drawMode, frustum) {\n    //TODO: move this into the iterator?\n    var allHidden = scene.applyVisibility(\n    drawMode,\n    frustum);\n\n    // For 3D scenes, sort fragments of this batch. \n    // Note that fragments of F2D scenes must be drawn in original order.\n    //TODO: Move this to the iterator?\n    if (!allHidden && !this.is2d()) {\n      //Generally opaque batches are sorted once by material, while\n      //transparent batches are sorted back to front each frame\n      if (scene.sortObjects && !this.getFragmentList().useThreeMesh)\n      scene.sortByDepth(frustum);else\n      if (!scene.sortDone)\n      scene.sortByMaterial();\n    }\n\n    return allHidden;\n  };\n\n  /**\n      * Remove shadow geometry (if exists) from model bounds.\n      * \n      * @param {THREE.Box3} bounds \n      */\n  this.trimPageShadowGeometry = function (bounds) {\n    if (this.hasPageShadow()) {\n      // This constant shadow size comes from LMV -> F2D.prototype.initSheet\n      var shadowSize = 0.0075;\n      bounds = bounds.clone();\n\n      // If we have pageShadow, we must have page_dimensions & page_width.\n      var pageWidth = this.getMetadata('page_dimensions', 'page_width');\n      bounds.max.x -= pageWidth * shadowSize;\n      bounds.min.y += pageWidth * shadowSize;\n    }\n\n    return bounds;\n  };\n\n  /**\n      * @param:  {bool}        includeGhosted\n      * @param:  {bool}        excludeShadow - Remove shadow geometry (if exists) from model bounds.\n      * @returns {THREE.Box3} \n      *\n      * NOTE: The returned box is just a pointer to a member, not a copy!\n      */\n  this.getVisibleBounds = function (includeGhosted, excludeShadow) {\n\n    if (this.visibleBoundsDirty) {\n\n      _visibleBounds.makeEmpty();\n      _visibleBoundsWithHidden.makeEmpty();\n\n      _iterator.getVisibleBounds(_visibleBounds, _visibleBoundsWithHidden, includeGhosted);\n\n\n      this.visibleBoundsDirty = false;\n\n    }\n\n    var bounds = includeGhosted ? _visibleBoundsWithHidden : _visibleBounds;\n\n    if (excludeShadow) {\n      bounds = this.trimPageShadowGeometry(bounds);\n    }\n\n    return bounds;\n  };\n\n  this.rayIntersect2D = function () {\n    var plane = new THREE.Plane();\n    var pointOnSheet = new THREE.Vector3();\n\n    return function (raycaster, dbIds, intersections, getDbIdAtPointFor2D) {\n      // A sheet is assumed to be, when loaded, pointing z-up on 0,0;\n      var bbox = _this.getBoundingBox(true); // Get original bounding box\n      var center = bbox.center();\n      plane.normal.set(0, 0, 1);\n      plane.constant = -center.z;\n\n      var tr = _this.getModelToViewerTransform();\n      if (tr) {\n        plane.applyMatrix4(tr);\n      }\n\n      var point = raycaster.ray.intersectPlane(plane);\n      if (point) {\n        pointOnSheet.copy(point);\n        var invTr = _this.getInverseModelToViewerTransform();\n        if (invTr) {\n          pointOnSheet.applyMatrix4(invTr);\n          pointOnSheet.z = center.z; // Avoid numerical problems\n        }\n        if (bbox.containsPoint(pointOnSheet)) {var _frags3, _frags3$getMaterial;\n          var cutplanes = (_frags3 = _frags) === null || _frags3 === void 0 ? void 0 : (_frags3$getMaterial = _frags3.getMaterial(0)) === null || _frags3$getMaterial === void 0 ? void 0 : _frags3$getMaterial.cutplanes; // Get cutplanes from first material\n          if (cutplanes && isPointOutsidePlanecuts(point, cutplanes)) {\n            return;\n          }\n          var distance = raycaster.ray.origin.distanceTo(point);\n          if (distance < raycaster.near || distance > raycaster.far) {\n            return;\n          }\n\n          var dbId, fragId;\n          if (getDbIdAtPointFor2D) {// This is an optional callback\n            var res = getDbIdAtPointFor2D(point);\n            dbId = res[0];\n            if (dbIds && dbIds.length > 0 && !dbIds.includes(dbId)) {// Filter according to passed array\n              return;\n            }\n\n            var modelId = res[1]; // modelId is 0 if the idtarget[1] is not used\n            if (modelId !== 0 && modelId !== _this.id) {\n              // In the case where another model is in front of this one, the dbId we get here\n              // will be for that model instead, so just ignore this result\n              return;\n            } else {var _frags4;\n              fragId = (_frags4 = _frags) === null || _frags4 === void 0 ? void 0 : _frags4.fragments.dbId2fragId[dbId];\n            }\n          }\n\n          var intersection = {\n            intersectPoint: point, // Backwards compatibility\n            point: point,\n            distance: distance,\n            dbId: dbId && _this.remapDbId(dbId),\n            fragId: fragId,\n            model: _this };\n\n\n          if (intersections) {\n            intersections.push(intersection);\n          }\n\n          return intersection;\n        }\n      }\n    };\n  }();\n\n  /**\n        * Performs a raytest and returns an object providing information about the closest hit. \n        * \n        * NOTE: We currently ignore hitpoints of fragments that are visible (MESH_VISIBLE==true) and not highlighted (MESH_HIGHLIGHTED==false). \n        *\n        * @param {THREE.RayCaster} raycaster\n        * @param {bool}            ignoreTransparent\n        * @param {number[]}        [dbIds]             - Array of dbIds. If specified, only fragments with dbIds inside the filter are checked.\n        *                                                If the model data has no instanceTree, this is just a whitelist of explicit fragment ids.\n        *                                                Note that a hitpoint will also be returned if it's actually occluded by a fragment outside the filter.\n        * @param {Array}           [intersections]     - Optional return array with all found intersections.\n        * @param {function}        [getDbIdAtPointFor2D] - Optional callback. For 2D models, to return the dbId and modelId in an array.\n        *\n        * @returns {Object|null}   Intersection result object providing information about closest hit point. Properties:\n        *                           - {number}   fragId\n        *                           - {Vector3}  point\n        *                           - {number}   dbId\n        *                           - {model}    model - pointer to this RenderModel\n        *                          (created/filled in VBIntersector.js, see for details)\n        */\n  // Add \"meshes\" parameter, after we get meshes of the object using id buffer,\n  // then we just need to ray intersect this object instead of all objects of the model.\n  this.rayIntersect = function (raycaster, ignoreTransparent, dbIds, intersections, getDbIdAtPointFor2D) {\n\n    if (this.is2d()) {\n      return this.rayIntersect2D(raycaster, dbIds, intersections, getDbIdAtPointFor2D);\n    }\n    // make sure that the cached overall bboxes are up-to-date.\n    // [HB:] Why are they updated here, but not used in this method?\n    if (this.visibleBoundsDirty)\n    this.getVisibleBounds();\n\n    // alloc array to collect intersection results\n    var intersects = [];\n    var i;\n\n    // Restrict search to certain dbIds if specified...\n    if (dbIds && dbIds.length > 0) {\n\n      //Collect the mesh fragments for the given database ID node filter.\n      var instanceTree = this.getInstanceTree();\n      var fragIds = [];\n      if (instanceTree) {\n        for (i = 0; i < dbIds.length; i++) {\n          instanceTree.enumNodeFragments(dbIds[i], function (fragId) {\n            fragIds.push(fragId);\n          }, true);\n        }\n      } else {\n        //No instance tree -- treat dbIds as fragIds\n        fragIds = dbIds;\n      }\n\n      //If there are multiple fragments it pays to still use\n      //the bounding volume hierarchy to do the intersection,\n      //because it can cull away entire fragments by bounding box,\n      //instead of checking every single fragment triangle by triangle\n      if (fragIds.length > 2) {//2 is just an arbitrary value, assuming checking 2 fragments is still cheap than full tree traversal\n        _iterator.rayCast(raycaster, intersects, dbIds);\n      } else {\n        // The filter restricted the search to a very small number of fragments.\n        // => Perform raytest on these fragments directly instead.\n        for (i = 0; i < fragIds.length; i++) {\n          var mesh = _frags.getVizmesh(fragIds[i]);\n          if (!mesh)\n          continue;\n          var res = VBIntersector.rayCast(mesh, raycaster, intersects);\n          if (res) {\n            intersects.push(res);\n          }\n        }\n      }\n\n    } else {\n      // no filter => perform raytest on all fragments\n      _iterator.rayCast(raycaster, intersects);\n    }\n\n    // stop here if no hit was found\n    if (!intersects.length)\n    return null;\n\n    // sort results by distance. \n    intersects.sort(function (a, b) {return a.distance - b.distance;});\n\n    //pick the nearest object that is visible as the selected.\n    var allIntersections = !!intersections;\n    intersections = intersections || [];\n\n    for (i = 0; i < intersects.length; i++) {\n      var fragId = intersects[i].fragId;\n      var isVisible = this.isFragVisible(fragId); //visible set,\n\n      // [HB:] Since we skip all meshes that are not flagged as visible, shouldn't we \n      //       better exclude them from the raycast in the first place?\n      if (isVisible) {\n\n        // skip transparent hits if specified\n        var material = _frags.getMaterial(fragId);\n        if (ignoreTransparent && material.transparent)\n        continue;\n\n        var intersect = intersects[i];\n\n        // check against cutplanes\n        var isCut = false;\n        if (material && material.cutplanes) {\n          isCut = isPointOutsidePlanecuts(intersect.point, material.cutplanes);\n        }\n\n        if (!isCut) {\n          intersections.push(intersect);\n        }\n\n        intersect.model = this;\n\n        if (!allIntersections && intersections.length > 0) {\n          // result is the closest hit that passed all tests => done.\n          break;\n        }\n      }\n    }\n\n    var result = intersections[0] || null;\n\n    if (result) {\n      // We might use multiple RenderModels => add this pointer as well.\n      result.model = this;\n    }\n\n    return result;\n  };\n\n\n  /** Set highlighting flag for a fragment. \n      *   @param   {number} fragId\n      *   @param   {bool}   value\n      *   @returns {bool}   indicates if flag state changed\n      */\n  this.setHighlighted = function (fragId, value) {\n    if (!_frags) {\n      return false;\n    }\n\n    var changed = _frags.setFlagFragment(fragId, MeshFlags.MESH_HIGHLIGHTED, value);\n\n    if (changed) {\n      if (value)\n      _numHighlighted++;else\n\n      _numHighlighted--;\n    }\n\n    return changed;\n  };\n\n  /** Sets MESH_VISIBLE flag for a fragment (true=visible, false=ghosted) */\n  // This function should probably not be called outside VisibityManager\n  // in order to maintain node visibility state.\n  this.setVisibility = function (fragId, value) {\n    if (_frags) {\n      _frags.setVisibility(fragId, value);\n      this.visibleBoundsDirty = true;\n    }\n  };\n\n  /** Sets MESH_VISIBLE flag for all fragments (true=visible, false=ghosted) */\n  this.setAllVisibility = function (value) {\n    if (_frags) {\n      _frags.setAllVisibility(value);\n      this.visibleBoundsDirty = true;\n    }\n  };\n\n  /** Sets the MESH_HIDE flag for all fragments that a flagged as line geometry. \n      *  Note that the MESH_HIDE flag is independent of the MESH_VISIBLE flag (which switches between ghosted and fully visible) \n      *\n      *  @param {bool} hide - value to which the MESH_HIDE flag will be set. Note that omitting this param would SHOW the lines, so\n      *                       that you should always provide it to avoid confusion.\n      */\n  this.hideLines = function (hide) {\n    if (_frags) {\n      _frags.hideLines(hide);\n    }\n  };\n\n  /** Sets the MESH_HIDE flag for all fragments that a flagged as point geometry. \n      *  Note that the MESH_HIDE flag is independent of the MESH_VISIBLE flag (which switches between ghosted and fully visible) \n      *\n      *  @param {bool} hide - value to which the MESH_HIDE flag will be set. Note that omitting this param would SHOW the points, so\n      *                       that you should always provide it to avoid confusion.\n      */\n  this.hidePoints = function (hide) {\n    if (_frags) {\n      _frags.hidePoints(hide);\n    }\n  };\n\n  /** Returns if one or more fragments are highlighed. \n      *   returns {bool}\n      *\n      * Note: This method will only work correctly as long as all highlighting changes are done via this.setHighlighted, not on FragmentList directly.\n      */\n  this.hasHighlighted = function () {\n    return !!_numHighlighted;\n  };\n\n  /** Returns true if a fragment is tagged as MESH_VISIBLE and not as MESH_HIGHLIGHTED. */\n  // \n  // [HB:] It's seems a bit unintuitive that the MESH_HIGHLIGHTED flag is checked here, but not considered by the other visibility-related methods.\n  //       For instance, consider the following scenarioes:\n  //        - After calling setVibility(frag, true), isFragVisible(frag) will still return false if frag was highlighed.\n  //        - If areAllVisible() returns true, there may still be fragments for which isFragVisible(frag) returns false.\n  this.isFragVisible = function (frag) {\n    return _frags.isFragVisible(frag);\n  };\n\n  /** Returns true if MESH_VISIBLE flag is set for all fragments. */\n  this.areAllVisible = function () {\n\n    // When using a custom iterator, we don't have per-fragment visibility control. \n    // We assume constantly true in this case.\n    if (!_frags) {\n      return true;\n    }\n\n    return _frags.areAllVisible();\n  };\n\n  /** Direct access to all RenderBatches. Used by ground shadows and ground reflection.\n       * @returns {RenderBatch[]}\n       */\n  this.getGeomScenes = function () {\n    if (!_iterator || !_iterator.getGeomScenes) {\n      return []; // Leaflet doesn't have geomScenes\n    }\n\n    return _iterator.getGeomScenes();\n  };\n\n  /** Get progress of current rendering traversal.\n       *  @returns {number} in [0,1]\n       */\n  this.getRenderProgress = function () {\n    var progress = _renderCounter / _iterator.getSceneCount();\n    // the renderCounter can become > scene count.\n    return progress > 1.0 ? 1.0 : progress;\n  };\n\n  /**\n      *  @params  {number} timeStamp\n      *  @returns {bool}   true if the model needs a redraw\n      */\n  this.update = function (timeStamp) {\n    // if there is an iterator that implements update method...\n    if (_iterator && _iterator.update) {\n      return _iterator.update(timeStamp);\n    }\n    // assume constant scene otherwise\n    return false;\n  };\n\n\n  /** Highlight an object with a theming color that is blended with the original object's material.\n      *   @param {number}        dbId\n      *   @param {THREE.Vector4} themingColor (r, g, b, intensity), all in [0,1]\n      *   @param {boolean} [recursive] - Should apply theming color recursively to all child nodes.\n      */\n  this.setThemingColor = function (dbId, color, recursive) {\n    if (_frags) {\n      // When using 2d with Otg db, we need to remap, because the vertex-buffers still contain otg.\n      dbId = this.reverseMapDbId(dbId);\n\n      var it = this.getInstanceTree();\n      if (recursive && it) {\n        it.enumNodeChildren(dbId, function (childDbId) {\n          _frags.setThemingColor(childDbId, color);\n        }, true);\n      } else {\n        _frags.setThemingColor(dbId, color);\n      }\n    } else if (_iterator.isModelIteratorTexQuad) {\n      // dbId is ignored in this case, as well as intensity. Apply theming to whole model\n      _iterator.setThemingColor(color);\n    } else {\n      logger.warn(\"Theming colors are not supported by this model type.\");\n    }\n  };\n\n  /** Revert all theming colors.\n      */\n  this.clearThemingColors = function () {\n    if (_frags) {\n      _frags.clearThemingColors();\n    } else if (_iterator.isModelIteratorTexQuad) {\n      _iterator.clearThemingColor();\n\n    }\n  };\n\n  /** Access to leaflet-specific functionality. Returns null if RenderModel is no leaflet. */\n  this.getLeaflet = function () {\n    if (_iterator.isModelIteratorTexQuad) {\n      return _iterator;\n    }\n    return null;\n  };\n\n  /**\n      * This function creates an internal copy of the FragmentList that is consolidated to reduce the\n      * shape count as far as possible. This takes more memory, but may strongly accelerate rendering\n      * for models with many small shapes.\n      *\n      * NOTE: For making consolidation effective, it should ideally be activated via the load options already.\n      *       This will automatically adjust the depth of the spatial hierarchy. Without that, the scene traversal\n      *       may still be slow and the performance gain much smaller.\n      *\n      * @param {MaterialManager} materials\n      * @param {number}          [byteLimit = 100 << 20] - Merging geometries is the most efficient technique in terms\n      *                                                    of rendering performance. But, it can strongly increase\n      *                                                    the memory consumption, particularly because merged\n      *                                                    geometry cannot be shared, i.e. multiple instances of\n      *                                                    a single geometry must be replicated per instance for merging.\n      *                                                    Therefore, the memory spent for merging is restricted.\n      *                                                    A higher value may make rendering faster, but increases (also GPU) memory\n      *                                                    workload.\n      * @param {boolean}         [multithreaded]         - Optional: If true, a part of the work is delegated to a worker thread.\n      *                                                    This function will return faster, but the consolidation is marked as not usable\n      *                                                    (see Consolidation.inProgress) until all worker results are returned.\n      *\n      * @param {FireFlyWebGLRenderer} glRenderer\n      */\n  this.consolidate = function (materials, byteLimit, glRenderer) {\n\n    // consolidate fragment list\n    var consolidation = consolidateFragmentList(this, materials, byteLimit, glRenderer, _consolidationMap);\n\n    // make BVHIterator use the consolidation when possible\n    _consolidationIterator = new ConsolidationIterator(_frags, consolidation);\n\n    // cache some intermediate results. Consolidations are memory-intensive, so it can be necessary to temporarily\n    // remove them to free memory. By caching intermediate results, we can rebuild them faster.\n    _consolidationMap = consolidation.consolidationMap;\n  };\n\n  /**\n      * Removes consolidation to free memory. Just some compact intermediate results are cached, so that the\n         * consolidation can be rebuilt quickly.\n         */\n  this.unconsolidate = function () {\n    if (!_consolidationIterator) {\n      return;\n    }\n\n    _consolidationIterator.dispose();\n    _consolidationIterator = null;\n  };\n\n  this.isConsolidated = function () {\n    return !!_consolidationIterator;\n  };\n\n  this.getConsolidation = function () {\n    return _consolidationIterator ? _consolidationIterator.getConsolidation() : null;\n  };\n\n  //F2D/PDF only -- mapping of F2D/PDF dbids to OTG property database v2 dbids\n  this.setDbIdRemap = function (dbidOldToNew) {\n    if (this.is2d()) {\n      this.idRemap = dbidOldToNew;\n    }\n  };\n\n\n  //F2D only -- maps ID stored in F2D vertex buffers to actual dbId as used\n  //by v2/OTG property databases.\n  this.remapDbId = function (dbId) {\n    if (this.idRemap && dbId > 0 && dbId < this.idRemap.length)\n    return this.idRemap[dbId];\n\n    return dbId;\n  };\n\n  this.reverseMapDbId = function (dbId) {\n    if (!this.idRemap || dbId <= 0)\n    return dbId;\n\n    if (!this.reverseMap) {\n      this.reverseMap = {};\n      for (var i = 0; i < this.idRemap.length; i++) {\n        this.reverseMap[this.idRemap[i]] = i;}\n    }\n\n    return this.reverseMap[dbId];\n  };\n\n\n  /**\n      * This function is only needed if...\n      *\n      *   1. You want to draw a fragment to an overlay scene that overdraws the original fragment, and\n      *   2. Consolidation is used for this model.\n      *\n      *  To avoid flickering artifacts, the geometry used for the overlay scene must exactly match with the\n      *  one used for the main scene rendering. However, when consolidation is used, this geometry may vary\n      *  and (slightly) differ from the original fragment geometry.\n      *\n      *  This function updates the given render proxy to make it exactly match with the geometry used for the\n      *  the last main scene rendering. This involves to replace geometry, material, and matrix when necessary.\n      *\n      *  NOTE: An updated proxy can exclusively be used for rendering. Do not use this function if you want to\n      *        access any vertex data directly.\n      *\n      *   @param {THREE.Mesh} proxy  - currently used proxy mesh to represent the fragment\n      *   @param {Number}     fragId - fragment represented by this proxy */\n  this.updateRenderProxy = function (proxy, fragId) {\n\n    if (!_consolidationIterator) {\n      // nothing to do - rendering will always use the original geometry anyway.\n      return;\n    }\n\n    // fragment might be consolidated.\n    _consolidationIterator.updateRenderProxy(proxy, fragId);\n  };\n\n  this.skipOpaqueShapes = function () {\n    if (_iterator && _iterator.skipOpaqueShapes) {\n      _iterator.skipOpaqueShapes();\n    }\n  };\n\n  // Call this whenever you modifed shapes, e.g., by setting/changing an animation transform.\n  // This makes sure that all hierarchical bboxes are updated.\n  // Without this, shapes may incorrectly classified as invisble, so that they may disappear or are missed by selection.\n  this.invalidateBBoxes = function () {\n    this.visibleBoundsDirty = true;\n  };\n\n  /**\n      * Change the paper visibility for a 2D sheet\n      */\n  this.changePaperVisibility = function (show) {\n    if (this.is2d()) {var _frags5;\n      (_frags5 = _frags) === null || _frags5 === void 0 ? void 0 : _frags5.setObject2DVisible(-1, show);\n    }\n  };\n\n  this.hasPaperTransparency = function () {var _frags6;\n    if (!this.is2d()) {\n      return false;\n    }\n\n    var paperOpacity = ((_frags6 = _frags) === null || _frags6 === void 0 ? void 0 : _frags6.dbIdOpacity[-1]) || 1;\n\n    return paperOpacity > 0 && paperOpacity < 1;\n  };\n\n\n  // Set a new model transform.\n  //  @param {THREE.Matrix4} [matrix] - If null, model matrix is cleared.\n  this.setModelTransform = function (matrix) {\n    if (_iterator.isModelIteratorTexQuad) {// Leaflet\n      _iterator.setModelMatrix(matrix);\n    } else {\n      _frags.setModelMatrix(matrix);\n      _consolidationIterator && _consolidationIterator.modelMatrixChanged();\n    }\n    // Recompute all bboxes\n    this.invalidateBBoxes();\n    this.getVisibleBounds(true);\n    _modelAndPlacementTransform = null;\n    _invModelAndPlacementTransform = null;\n  };\n\n  this.getModelTransform = function () {var _iterator2, _frags7;\n    if ((_iterator2 = _iterator) === null || _iterator2 === void 0 ? void 0 : _iterator2.isModelIteratorTexQuad) {// Leaflet\n      return _iterator.getModelMatrix();\n    }\n\n    return (_frags7 = _frags) === null || _frags7 === void 0 ? void 0 : _frags7.matrix;\n  };\n\n  this.getInverseModelTransform = function () {var _iterator3, _frags8;\n    if ((_iterator3 = _iterator) === null || _iterator3 === void 0 ? void 0 : _iterator3.isModelIteratorTexQuad) {// Leaflet\n      return _iterator.getInverseModelMatrix();\n    }\n\n    return (_frags8 = _frags) === null || _frags8 === void 0 ? void 0 : _frags8.getInverseModelMatrix();\n  };\n\n  /*\n      * Returns current placementTransform. By default, this is the placementMatrix applied at load time,\n      * but may be overriden if resetPlacement was called after loading.\n      * Returned value must not be modified from outside.\n      */\n  this.getPlacementTransform = function () {\n    _identityMatrix = _identityMatrix || new LmvMatrix4(true);\n    return this._placementTransform || this.getData().placementTransform || _identityMatrix;\n  };\n\n  /*\n      * Returns the globalOffset applied to the model. This may be the one applied at load time or\n      * a dynamic globalOffset applied afterwards.\n      *  @returns {Vector3}\n      */\n  this.getGlobalOffset = function () {\n    return this._globalOffset || this.getData().globalOffset;\n  };\n\n  /**\n      * Change the placement matrix of the model. This overrides the placement transform applied at loadTime.\n      *  @param {LmvMatrix4} matrix         - Note that you need 64-Bit precision for large values.\n      *  @param {Vector3}    [globalOffset] - Optionally, the globalOffset can be reset in the same step.\n      */\n  this.setPlacementTransform = function (matrix) {\n\n    // Create/Set override placementTransform\n    this._placementTransform = (this._placementTransform || new LmvMatrix4(true)).copy(matrix);\n\n    // Update dynamic model matrix based on current placementMatrix and globalOffset\n    DynamicGlobalOffset.updateModelMatrix(this, matrix, this.getGlobalOffset());\n  };\n\n  /**\n      * Change globalOffset that is applied to transform this model from global to viewer coordinates.\n      */\n  this.setGlobalOffset = function (newOffset) {\n    this._globalOffset = this._globalOffset || new THREE.Vector3();\n    this._globalOffset.copy(newOffset);\n\n    // Update dynamic model matrix based on current placementMatrix and globalOffset\n    var pt = this.getPlacementTransform();\n    DynamicGlobalOffset.updateModelMatrix(this, pt, newOffset);\n  };\n\n  /**\n      * Returns the model transform combined with placementWithOffset.\n      * It converts the source model coordinate system to viewer coordinates\n      * (the coordinates used for rendering, also including subtracted globalOffset)\n      * @returns {THREE.Matrix4|null}\n      */\n  this.getModelToViewerTransform = function () {var _this$getData;\n    if (_modelAndPlacementTransform) {// Return cached value if available\n      return _modelAndPlacementTransform;\n    }\n\n    var modelTransform = this.getModelTransform();\n    var placementWithOffset = (_this$getData = this.getData()) === null || _this$getData === void 0 ? void 0 : _this$getData.placementWithOffset;\n\n    if (modelTransform || placementWithOffset) {\n      _modelAndPlacementTransform = new THREE.Matrix4();\n\n      if (modelTransform) {\n        _modelAndPlacementTransform.multiply(modelTransform);\n      }\n      if (placementWithOffset) {\n        _modelAndPlacementTransform.multiply(placementWithOffset);\n      }\n    }\n\n    return _modelAndPlacementTransform;\n  };\n\n  /**\n      * Returns the inverse of the model transform combined with placementWithOffset.\n      * @returns {THREE.Matrix4|null}\n      */\n  this.getInverseModelToViewerTransform = function () {\n    if (_invModelAndPlacementTransform) {// Return cached value if available\n      return _invModelAndPlacementTransform;\n    }\n\n    var tr = this.getModelToViewerTransform();\n    if (tr) {\n      _invModelAndPlacementTransform = new THREE.Matrix4();\n      _invModelAndPlacementTransform.getInverse(tr);\n\n    }\n\n    return _invModelAndPlacementTransform;\n  };\n\n  // Overrides inner state of RenderModel.\n  this.setInnerAttributes = function (attributes) {\n    this.id = attributes._id;\n    _visibleBounds = attributes._visibleBounds;\n    _visibleBoundsWithHidden = attributes._visibleBoundsWithHidden;\n    _tmpBox = attributes._tmpBox;\n    this.enforceBvh = attributes._enforceBvh;\n    _numHighlighted = attributes._numHighlighted;\n    _geoms = attributes._geoms;\n    _frags = attributes._frags;\n    _linearIterator = attributes._linearIterator;\n    _bvhIterator = attributes._bvhIterator;\n    _iterator = attributes._iterator;\n    _consolidationIterator = attributes._consolidationIterator;\n    _consolidationMap = attributes._consolidationMap;\n    _renderCounter = attributes._renderCounter;\n    _frustum = attributes._frustum;\n    _drawMode = attributes._drawMode;\n    _bvhOn = attributes._bvhOn;\n  };\n\n  // Get inner state of RenderModel.\n  this.getInnerAttributes = function () {\n    return {\n      _id: this.id,\n      _visibleBounds: _visibleBounds,\n      _visibleBoundsWithHidden: _visibleBoundsWithHidden,\n      _tmpBox: _tmpBox,\n      _enforceBvh: this.enforceBvh,\n      _numHighlighted: _numHighlighted,\n      _geoms: _geoms,\n      _frags: _frags,\n      _linearIterator: _linearIterator,\n      _bvhIterator: _bvhIterator,\n      _iterator: _iterator,\n      _consolidationIterator: _consolidationIterator,\n      _consolidationMap: _consolidationMap,\n      _renderCounter: _renderCounter,\n      _frustum: _frustum,\n      _drawMode: _drawMode,\n      _bvhOn: _bvhOn };\n\n  };\n\n  /**\n      * Changes whether cutplanes should affect the visibility of the model.\n      * Works only for 2D models (in OTG the materials are shared).\n      * @param {MaterialManager} materialsManager\n      * @param {boolean}         doNotCut\n      */\n  this.setDoNotCut = function (materialsManager, doNotCut) {\n    if (_doNotCut === doNotCut) {\n      return;\n    }\n\n    _doNotCut = doNotCut;\n    if (_frags) {\n      _frags.doNotCut = doNotCut;\n    }\n\n    var modelMaterials = materialsManager.getModelMaterials(this);\n    var cb = function cb(mat) {var _mat$cutplanes;\n      mat.doNotCut = doNotCut;\n      var updateNeeded = ((_mat$cutplanes = mat.cutplanes) === null || _mat$cutplanes === void 0 ? void 0 : _mat$cutplanes.length) > 0 === doNotCut;\n      if (updateNeeded) {\n        materialsManager._applyCutPlanes(mat);\n        mat.needsUpdate = true;\n      }\n    };\n    Object.values(modelMaterials.mats).forEach(cb);\n    Object.values(modelMaterials.matsNonHDR).forEach(cb);\n    Object.values(modelMaterials.selectionMats).forEach(cb);\n  };\n\n  this.getDoNotCut = function () {\n    return _doNotCut;\n  };\n}","import * as globals from '../globals';\nimport { FrustumIntersector } from './FrustumIntersector';\nimport * as THREE from \"three\";\nimport { RenderFlags } from \"./RenderFlags\";\nimport { ResetFlags } from \"./ResetFlags\";\nimport { ModelExploder } from \"./ModelExploder\";\n\n/**\n                                                  * RenderScene\n                                                  * Represents the full graphical scene.\n                                                  * Used for iterating through the scene for progressive rendering,\n                                                  * hit testing, etc.\n                                                  * @constructor\n                                                  * */\nexport function RenderScene() {\n\n  var _needsRender = false; // if true, scene needs a re-render due to a paging-failure in last render traversal\n\n  var _done = false; // true indicates that progressive rendering has finished\n  // since last reset call, i.e. all batches have been traversed.\n\n  var _models = []; // {RenderModel[]} - All RenderModels to be rendered.\n  var _candidateScenes = []; // {RenderBatch[]} - _candidateScenes[i] points to the next batch to be rendered from _models[i]. Same length as _models.\n  var _previousScenes = []; // {RenderBatch[]} - _previousScenes[i] points to the previous batch rendered from _models[i]. Same length as _models.\n  var _tmpBox = new THREE.Box3(); // Reused for return values of getVisibleBounds() \n\n  var _hiddenModels = []; // {RenderModel[]} - All models that are currently loaded, but excluded from rendering/selection etc.\n\n  var _frustum = new FrustumIntersector(); // updated for current camera in this.reset().\n  var _raycaster = new THREE.Raycaster();\n\n  //var _frameStamp    = 0;             // increased with each render traversal restart; set, not used. For debug?\n  var _perf = performance; // shortcut to browser-provided performance object\n\n  // During motion, we usually restart rendering at any frame, i.e. a frame is never resumed. When setting this\n  // option, we exploit this to render transparent shapes earlier. (and skip less important opaque ones)\n  this.enableNonResumableFrames = false;\n\n  // Determines how much of the render budget is reserved for transparent shapes.\n  // E.g., a value of 0.1 means that 10% of the render budget is spent for transparent shapes.\n  this.budgetForTransparent = 0.1;\n\n  // If true, we assume the current frame not to be resumed and\n  // render some transparent shapes before the opaque ones are done.\n  var _frameWillNotBeResumed = false;\n\n  // If _frameWillNotBeResumed is true, this array collects transparent scenes and renders them\n  // back-to-front at the end of a frame.\n  var _transparentScenes = []; // {THREE.Scene|RenderBatch}[]\n\n  // needed for back-to-front sorting of transparent objects (see renderTransparentScenes)\n  var _camera = null;\n\n\n  this.frustum = function () {\n    return _frustum;\n  };\n\n  function findById(models, modelId) {\n    for (var i = 0; i < models.length; i++) {\n      var model = models[i];\n      if (model && model.id === modelId) {\n        return model;\n      }\n    }\n    return null;\n  }\n\n  this.findModel = function (modelId) {return findById(_models, modelId);};\n  this.findHiddenModel = function (modelId) {return findById(_hiddenModels, modelId);};\n\n  this.addModel = function (renderModel) {\n    _models.push(renderModel);\n    _candidateScenes.length = _models.length;\n    _previousScenes.length = _models.length;\n    this.recomputeLinePrecision();\n  };\n\n  this.removeModel = function (renderModel) {\n    var idx = _models.indexOf(renderModel);\n    if (idx >= 0) {\n      _models.splice(idx, 1);\n    }\n    _candidateScenes.length = _models.length;\n    _previousScenes.length = _models.length;\n    this.recomputeLinePrecision();\n    return idx >= 0;\n  };\n\n  this.addHiddenModel = function (renderModel) {\n    var idx = _hiddenModels.indexOf(renderModel);\n    if (idx < 0) {\n      _hiddenModels.push(renderModel);\n    }\n    return idx < 0;\n  };\n\n  this.removeHiddenModel = function (renderModel) {\n    var idx = _hiddenModels.indexOf(renderModel);\n    if (idx >= 0) {\n      _hiddenModels.splice(idx, 1);\n    }\n    return idx >= 0;\n  };\n\n  this.isEmpty = function () {\n    return _models.length === 0;\n  };\n\n  this.needsRender = function () {\n    return _needsRender;\n  };\n  this.resetNeedsRender = function () {\n    _needsRender = false;\n  };\n\n  this.recomputeLinePrecision = function () {\n    var value = 1;\n    for (var i = 0, len = _models.length; i < len; ++i) {\n      var modelBox = _models[i].getData().bbox;\n\n      // Note that modelBox.getBoundingSphere() may not exist if the box is an LmvBox3. \n      var modelValue = THREE.Box3.prototype.getBoundingSphere.call(modelBox).radius * 0.001;\n      value = Math.min(value, modelValue);\n    }\n    _raycaster.linePrecision = value;\n  };\n\n  /**\n      *  For each sub-scene, keep a running average of how long it took to render over the\n      *  last few frames.\n      *   @param {THREE.Scene|RenderBatch} scene\n      *   @param {number}                  frameTime - last measured rendering time in ms\n      */\n  function updateAvgFrameTime(scene, frameTime) {\n    if (scene.avgFrameTime === undefined)\n    scene.avgFrameTime = frameTime;else\n    {\n      scene.avgFrameTime = 0.8 * scene.avgFrameTime + 0.2 * frameTime;\n    }\n  }\n\n  /**\n     *  Renders transparent scenes in back-to-front order.\n     *\n     *  @param {RenderCB}      renderObjectsCB - Called for each element of the scenes array\n     *  @param {UnifiedCamera} camera\n     *  @param {RenderBatch[]} scenes          - Array of RenderBatches (or THREE.Scene with .boundingBox property)\n     */\n  function renderTransparentScenes(scenes, camera, renderObjectCB) {\n\n    // compute camera distance for each scene\n    var i, scene;\n    for (i = 0; i < scenes.length; i++) {\n      scene = scenes[i];\n      var bbox = scene.boundingBox || scene.getBoundingBox();\n      scene.cameraDistance = bbox.distanceToPoint(camera.position);\n    }\n\n    // sort by decreasing camera distance\n    var sortOrder = function sortOrder(a, b) {\n      return b.cameraDistance - a.cameraDistance;\n    };\n    scenes.sort(sortOrder);\n\n    // render each scene and update average frame time\n    var t0 = performance.now();\n    for (i = 0; i < scenes.length; i++) {\n\n      // render scene\n      scene = scenes[i];\n      renderObjectCB(scene);\n\n      // measure elapsed time\n      var t1 = performance.now();\n      var delta = t1 - t0;\n      t0 = t1;\n\n      // track average frame time\n      updateAvgFrameTime(scene, delta);\n    }\n  }\n\n  /**\n     * Indicates if the current traversal is done with the assumption that this frame will not be resumed.\n     *  @returns {boolean}\n     */\n  this.frameResumePossible = function () {\n    return !_frameWillNotBeResumed;\n  };\n\n  /**\n       * Incrementally render some meshes until we run out of time.\n       *  @param {RenderCB} cb            - Called that does the actual rendering. Called for each RenderBatch to be rendered.\n       *  @param {number}   timeRemaining - Time in milliseconds that can be spend in this function call.\n       *  @returns {number} Remaining time left after the call. Usually <=0.0 if the frame could not be fully finished yet.\n       * \n       * @callback RenderScene~RenderCB\n       * @param {RenderBatch} scene\n       */\n  this.renderSome = function (renderObjectCB, timeRemaining) {\n\n    var t0 = _perf.now(),t1;\n\n    // reserve some time for transparent shapes.\n    var timeForTransparent = this.budgetForTransparent * timeRemaining;\n\n    // repeat until time budget is consumed...\n    var model;\n    while (1) {\n\n      //Find the best candidate render batch to render now -- in case\n      //there are multiple models.\n      //TODO: In case a huge number of models is loaded, we may have to\n      //rethink the linear loop below and use some priority heap or somesuch.\n      var candidateIdx = 0;\n      var scene = null;\n      for (var iq = 0; iq < _candidateScenes.length; iq++) {\n\n        // candidate is the next RenderBatch to be processed from _models[q] \n        var candidate = _candidateScenes[iq];\n        model = _models[iq];\n        if (!candidate)\n        _candidateScenes[iq] = candidate = model.nextBatch();\n\n        // If the camera is in motion and the time for opaque scenes is over, continue with transparent shapes.\n        var skipOpaque = _frameWillNotBeResumed && timeRemaining < timeForTransparent;\n        if (skipOpaque) {\n\n          // check if the next candidate is still an opaque one. Note that the .sortObjects\n          // flag indicates whether a RenderBatch contains transparent objects.\n          var isOpaque = candidate && !candidate.sortObjects;\n\n          if (isOpaque) {\n            // skip current candidate and use the first available transparent scene instead\n            model.skipOpaqueShapes();\n            candidate = model.nextBatch();\n          }\n        }\n\n        if (candidate === null) {\n          // No more batches to render from this model\n          continue;\n        }\n\n        // If all previous candidates were null, _candidateScenes[q] is obviously the best one so far.\n        if (!scene) {\n          candidateIdx = iq;\n          scene = candidate;\n        }\n\n        // Choose current candidate only if its renderImportance is higher.\n        // The renderImportance of RenderBatches is set by model iterators.\n        if (candidate.renderImportance > scene.renderImportance) {\n          candidateIdx = iq;\n          scene = candidate;\n        }\n      }\n\n      // Render the batch we chose above and determine whether to continue the loop\n      if (scene) {\n        //Fetch a new render batch from the model that we took the\n        //current batch from.\n        _candidateScenes[candidateIdx] = _models[candidateIdx].nextBatch();\n\n        // If we are in a non-resumable frame, we try to get the most important ones of opaque and\n        // transparent scenes. Therefore, the traversal of transparent scenes will also be ordered\n        // by decreasing priority just like for opaque ones. For correct rendering, however,\n        // we cannot render them directly here. Instead, we must collect them first and render them\n        // back-to-front at the end of the function.\n        if (scene.sortObjects && _frameWillNotBeResumed) {\n\n          // defer to the end of the frame\n          _transparentScenes.push(scene);\n\n          // reserve frame time based on past rendering times. Just for the very first use,\n          // we use an initial guess value as fallback.\n          timeRemaining -= scene.avgFrameTime === undefined ? 0.05 : scene.avgFrameTime;\n\n        } else {\n\n          // do the actual rendering\n          renderObjectCB(scene);\n          if (scene.hasOwnProperty(\"drawEnd\"))\n          scene.drawEnd = scene.lastItem;\n\n          // get time that we spent for rendering of the last batch\n          t1 = _perf.now();\n          var delta = t1 - t0; // in milliseconds\n          t0 = t1;\n\n          //For each sub-scene, keep a running average\n          //of how long it took to render over the\n          //last few frames.\n          updateAvgFrameTime(scene, delta);\n\n          // update remaining time\n          // Note that we don't do accurate timing here, but compute with average values instead.\n          // In this way, the number of rendered batches is more consistent across different frames\n          timeRemaining -= scene.avgFrameTime;\n        }\n\n        // get time that we spent for rendering of the last batch\n        t1 = _perf.now();\n        var delta = t1 - t0; // in milliseconds\n        t0 = t1;\n\n        //For each sub-scene, keep a running average\n        //of how long it took to render over the\n        //last few frames.\n        updateAvgFrameTime(scene, delta);\n\n        // update remaining time\n        // Note that we don't do accurate timing here, but compute with average values instead.\n        // In this way, the number of rendered batches is more consistent across different frames\n        timeRemaining -= scene.avgFrameTime;\n\n        // Check if we should exit the loop...\n        if (timeRemaining <= 0) {\n          break;\n        }\n\n      } else {\n        // No more batches => Frame rendering finished, if all models are loaded\n        _done = true;\n        break;\n      }\n    }\n\n    // Render some deferred transparent shapes (_transparentShapes). Note that this array will\n    // usually be empty if _frameWillNotBeResumed is false\n    if (_transparentScenes.length > 0) {\n\n      renderTransparentScenes(_transparentScenes, _camera, renderObjectCB);\n\n      // all scenes processed. Clear array.\n      _transparentScenes.length = 0;\n    }\n\n    return timeRemaining;\n  };\n\n  //TODO: This method needs to be revisited as on demand loading is removed from the code base  \n  /** Resets the scene traversal \n   *   @param  {UnifiedCamera} camera\n   *   @param  {number}        drawMode     - E.g., RENDER_NORMAL. See RenderFlags.js\n   *   @param: {number}        [resetType]  - Must be one of RESET_NORMAL, RESET_REDRAW or RESET_RELOAD.\n   *                                          Only used when on demand loading is enabled. RESET_RELOAD will reload and redraw\n   *                                          geometry. RESET_REDRAW will redraw geometry. RESET_NORMAL will only redraw geometry\n   *                                          that hasn't already been drawn. If undefined RESET_NORMAL is used.\n   */\n  this.reset = function (camera, drawMode, resetType, cutPlanes) {\n    //_frameStamp++;\n    _done = false;\n\n    this.resetNeedsRender();\n\n    //Calculate the viewing frustum\n    //TODO: same math is done in the renderer also. We could unify\n    _frustum.reset(camera, cutPlanes);\n    _frustum.areaCullThreshold = globals.PIXEL_CULLING_THRESHOLD;\n\n    if (!_models.length)\n    return;\n\n    // If the camera is in-motion, we assume the frame not to be resumed. This allows us to render transparent shapes\n    // earlier. This special treatment is only used/needed for the main scene pass.\n    _frameWillNotBeResumed = this.enableNonResumableFrames && resetType == ResetFlags.RESET_RELOAD && drawMode === RenderFlags.RENDER_NORMAL;\n\n    _camera = camera;\n\n    //Begin the frustum based scene iteration process per model.\n    //A \"Model\" is all the objects to display. There's typically one model in a scene, so length is 1. \n    for (var i = 0; i < _models.length; i++) {\n      // decide what iterator to use, usually the BVH iterator\n      _models[i].resetIterator(camera, _frustum, drawMode, resetType);\n      // get the first RenderBatch (some set of fragments) to render.\n      _candidateScenes[i] = _models[i].nextBatch();\n      _previousScenes[i] = null;\n    }\n  };\n\n\n  this.isDone = function () {\n    return _done || this.isEmpty();\n  };\n\n  // Visibility and highlighting methods: see RenderModel.js for details.\n\n  this.setAllVisibility = function (value) {\n    for (var i = 0; i < _models.length; i++) {\n      _models[i].setAllVisibility(value);}\n  };\n\n  this.hideLines = function (hide) {\n    for (var i = 0; i < _models.length; i++) {\n      _models[i].hideLines(hide);}\n  };\n\n  this.hidePoints = function (hide) {\n    for (var i = 0; i < _models.length; i++) {\n      _models[i].hidePoints(hide);}\n  };\n\n  this.hasHighlighted = function () {\n    for (var i = 0; i < _models.length; i++) {\n      if (_models[i].hasHighlighted())\n      return true;}\n\n    return false;\n  };\n\n  this.areAllVisible = function () {\n    for (var i = 0; i < _models.length; i++) {\n      if (!_models[i].areAllVisible())\n      return false;}\n\n    return true;\n  };\n\n  this.areAll2D = function () {\n    for (var i = 0; i < _models.length; i++) {\n      if (!_models[i].is2d())\n      return false;}\n\n    return true;\n  };\n\n  this.areAll3D = function () {\n    for (var i = 0; i < _models.length; i++) {\n      if (!_models[i].is3d())\n      return false;}\n\n    return true;\n  };\n\n  /** Trigger bbox recomputation. See RenderModel.js for details. */\n  this.invalidateVisibleBounds = function () {\n    for (var i = 0; i < _models.length; i++) {\n      _models[i].visibleBoundsDirty = true;}\n  };\n\n  /**\n     * @param {bool}            includeGhosted\n     * @param {function(model)} [modeFilter]\n     * @param {bool}            excludeShadow - Remove shadow geometry (if exists) from model bounds.\n     * @returns {THREE.Box3} \n     *\n     * NOTE: The returned box object is always the same, i.e. later calls\n     *       affect previously returned values. E.g., for\n     *        var box1 = getVisibleBounds(true);\n     *        var box2 = getVisibleBounds(false);\n     *       the second call would also change box1.\n     */\n  this.getVisibleBounds = function (includeGhosted, bboxFilter, excludeShadow) {\n    _tmpBox.makeEmpty();\n    for (var i = 0; i < _models.length; i++) {\n      var model = _models[i];\n      var modelBox = model.getVisibleBounds(includeGhosted, excludeShadow);\n\n      // Consider bboxFilter\n      var skipModel = bboxFilter && !bboxFilter(modelBox);\n      if (skipModel) {\n        continue;\n      }\n\n      _tmpBox.union(modelBox);\n    }\n    return _tmpBox;\n  };\n\n  /**\n      * @param {THREE.Vector3} position            - Ray origin.\n      * @param {THREE.Vector3} direction           - Ray direction.\n      * @param {bool}          [ignoreTransparent] - Shoot trough transparent objects.\n      * @param {number[]|number[][]} [dbIds]       - Optional filter of dbIds to be considered for testing. see RenderModel.rayIntersect().\n      *                                              If modelIds is set, dbIds[i] must provide a separate dbId array for modelIds[i].\n      * @param {number[]}      [modelIds]          - Optional list of modelIds to be considered for rayIntersection. (default is to consider all)\n      * @param {Array}         [intersections]     - Optional return array with all found intersections.\n      * @param {function}      [getDbIdAtPointFor2D] - Optional callback. For 2D models, to return the dbId and modelId in an array.\n      *\n      * @returns {Object|null} Intersection result obect (see RenderModel.rayIntersect)\n      */\n  // Add \"meshes\" parameter, after we get meshes of the object using id buffer,\n  // then we just need to ray intersect this object instead of all objects of the model.\n  this.rayIntersect = function (position, direction, ignoreTransparent,\n  dbIds, modelIds,\n  intersections, getDbIdAtPointFor2D) {\n\n    // Init raycaster\n    _raycaster.set(position, direction);\n\n    // For multiple RenderModels, perform raytest on each of them and find the closest one.\n    if (_models.length > 1) {\n      // Collect raytest result objects from each 3D model\n      var modelHits = [];\n\n      if (modelIds) {\n        for (var i = 0; i < modelIds.length; i++) {\n          var model = this.findModel(modelIds[i]);\n          if (model) {\n            var modelDbIds = dbIds && dbIds[i];\n            var res = model.rayIntersect(_raycaster, ignoreTransparent, modelDbIds, intersections, getDbIdAtPointFor2D);\n            if (res) {\n              modelHits.push(res);\n            }\n          }\n        }\n      } else {\n        for (var _i = 0; _i < _models.length; _i++) {\n          // Perform raytest on model i\n          var _res = _models[_i].rayIntersect(_raycaster, ignoreTransparent, dbIds, intersections, getDbIdAtPointFor2D);\n\n          if (_res) {\n            modelHits.push(_res);\n          }\n        }\n      }\n\n      if (!modelHits.length)\n      return null;\n\n      // Return closest hit\n      modelHits.sort(function (a, b) {return a.distance - b.distance;});\n      return modelHits[0];\n    } else {\n      // If we don't have any RenderModel, just return null.\n      if (!_models.length)\n      return null;\n\n      // Apply modelIds filter\n      var _model = _models[0];\n      if (modelIds && modelIds.indexOf(_model.id) === -1) {\n        return null;\n      }\n\n      // If we only have a single RenderModel, just call rayIntersect() on it.\n      return _model.rayIntersect(_raycaster, ignoreTransparent, dbIds, intersections, getDbIdAtPointFor2D);\n    }\n  };\n\n  /**\n      *  Progress of current frame rendering. \n      *  @returns {number} Value in [0,1], where 1 means finished.\n      */\n  this.getRenderProgress = function () {\n    return _models[0].getRenderProgress();\n  };\n\n  /** @returns {RenderModel[]} */\n  this.getModels = function () {\n    return _models;\n  };\n\n  /** @returns {RenderModel[]} */\n  this.getHiddenModels = function () {\n    return _hiddenModels;\n  };\n\n  // ----------------------------\n  // Warning: The methods in the section below assume that there is exactly one RenderModel.\n  //          They will ignore any additional models and cause an exception if the model list is empty.\n  // \n\n  // Direct access to FragmentList, GeometryList, and total number of RenderBatches.\n  //\n  // Note: \n  //  - The methods do only care for model 0 and ignore any additional ones.\n  //  - Will cause an error when called if the RenderModel array is empty.\n  this.getFragmentList = function () {\n    return _models[0].getFragmentList();\n  };\n  this.getGeometryList = function () {\n    return _models[0].getGeometryList();\n  };\n  this.getSceneCount = function () {\n    return _models[0].getSceneCount();\n  };\n\n  //Used by ground shadow update, ground reflection update, and screenshots\n  this.getGeomScenes = function () {\n    //TODO: temporarily rolled back because it breaks selection highlighting due to some ground shadow reason\n    return _models[0].getGeomScenes();\n    /*\n                                           var scenes = [];\n                                           for (var i=0; i<_models.length; i++) {\n                                               // Collect all scenes from next model\n                                               var modelScenes = _models[i].getGeomScenes();\n                                               for (var j=0; j<modelScenes.length; j++) {\n                                                   // Some scenes may not exist. E.g., if it corresponds to an empty BVH node.\n                                                   var scene = modelScenes[j];\n                                                   if (scene) {\n                                                       scenes.push(scene);\n                                                   }\n                                               }\n                                           }\n                                           return scenes;\n                                           */\n  };\n\n  // ---------------- End of section of functions without support for multiple RenderModels\n\n  /** Sets animation transforms for all fragments to create an \"exploded view\": Each fragment is displaced  \n    * away from the model bbox center, so that you can distuinguish separate components. \n    *\n    * If the model data provides a model hierarchy (given via model.getData().instanceTree), it is also considered for the displacement.\n    * In this case, we recursively shift each object away from the center of its parent node's bbox. \n    *\n    * @param {number} scale - In [0,1]. 0 means no displacement (= reset animation transforms). \n    *                                   1 means maximum displacement, where the shift distance of an object varies \n    *                                   depending on distance to model center and hierarchy level.\n    */\n  this.explode = function (scale) {\n\n    if (!_models.length)\n    return;\n\n    for (var q = 0; q < _models.length; q++) {\n\n      var model = _models[q];\n\n      ModelExploder.explode(model, scale);\n    }\n\n    this.invalidateVisibleBounds();\n\n  };\n\n  /** \n      *  @params  {number} timeStamp\n      *  @returns {bool}   true if any of the models needs a redraw\n      */\n  this.update = function (timeStamp) {\n\n    // call update for all RenderModels and track\n    // if any of these needs a redraw\n    var needsRedraw = false;\n    for (var q = 0; q < _models.length; q++) {\n      var model = _models[q];\n      needsRedraw = needsRedraw || model.update(timeStamp);\n    }\n    return needsRedraw;\n  };\n\n  /*\n      *  Move model from visible models to hidden models\n      *   @param {number} modelId - id of a currently visible model\n      *   @returns {bool} true on success\n      */\n  this.hideModel = function (modelId) {\n\n    // find model in the list of visible ones\n    for (var i = 0; i < _models.length; i++) {\n      var model = _models[i];\n      if (model && model.id === modelId) {\n        // move model from visible to hidden models\n        this.removeModel(model);\n        _hiddenModels.push(model);\n        return true;\n      }\n    }\n    // modelID does not refer to any visible model\n    return false;\n  };\n\n  /*\n      * Move previously hidden model to the array of rendered models.\n      *  @param {number} modelId - id of a RenderModel in hiddenModels array\n      *  @returns {bool} true on success\n      */\n  this.showModel = function (modelId) {\n\n    // find model in list of hidden models\n    for (var i = 0; i < _hiddenModels.length; ++i) {\n      var model = _hiddenModels[i];\n      if (model && model.id === modelId) {\n        // mode model from hidden to visible models\n        this.addModel(model);\n        _hiddenModels.splice(i, 1);\n        return true;\n      }\n    }\n    // modelId does not refer to a hidden model\n    return false;\n  };\n}","export var ResetFlags = {\n  RESET_NORMAL: 0,\n  RESET_REDRAW: 1,\n  RESET_RELOAD: 2 };","\nimport * as THREE from \"three\";\n\n\nvar normals = [\nnew THREE.Vector3(1, 0, 0),\nnew THREE.Vector3(0, 1, 0),\nnew THREE.Vector3(0, 0, 1),\nnew THREE.Vector3(-1, 0, 0),\nnew THREE.Vector3(0, -1, 0),\nnew THREE.Vector3(0, 0, -1)];\n\n\nvar plane = new THREE.Plane();\n\n// Returns an array of vector4 values that describe the cutplanes needed to apply a given sectionBox\nfunction box2CutPlanes(box, transform) {\n\n  var planeVecs = [];\n\n  for (var i = 0; i < normals.length; i++) {\n\n    plane.normal.copy(normals[i]);\n    var onPlane = i < 3 ? box.max : box.min;\n    plane.constant = -plane.normal.dot(onPlane);\n\n    if (transform) {\n      plane.applyMatrix4(transform);\n    }\n\n    planeVecs.push(new THREE.Vector4(plane.normal.x, plane.normal.y, plane.normal.z, plane.constant));\n  }\n\n  return planeVecs;\n}\n\n// Compute pixels per unit parameter for 2D materials.\n//  @param {Camera}  camera\n//  @param {bool}    is2d\n//  @param {Box3}    worldBox      - worldBox of all visible geometry\n//  @param {number}  deviceHeight  - canvas height * pixelRatio\n//  @param {Vector4} [cutPlane]    - Optional: A cutplane in 3D containg 2D geometry. If specified, its camera distance is\n//                                   considered to determine pixelsPerUnit.\n//  @param {Vector3} [modelBox]    - Only for 2D: The min-plane of this box is assumed as ground plane\nfunction getPixelsPerUnit(camera, is2d, worldBox, deviceHeight, cutPlane, modelBox) {\n  if (!camera.isPerspective) {\n    // Since tan(fov/2) = 0.5 for orthographic camera, the equation can be simplified here\n    return deviceHeight / camera.orthoScale;\n  }\n\n  var pt = worldBox.center();\n  if (is2d) {\n    //Here we base pixel scale on the point at the center of the view.\n    //However, this might not always be the most appropriate point,\n    //e.g. at oblique angles or when the drawing is off to one side.\n    //It might make more sense to base the scale on the distance of the\n    //camera to the nearest part of the world bounding box, which requires\n    //a more generic ray-aabb test.\n    var worldUp = 'z'; // in 2d, world-up is always Z\n    var ray = new THREE.Vector3(0, 0, 1);\n    var groundPt = intersectGroundViewport(ray, camera, worldUp, modelBox);\n\n    // Can be null in the degenerate case (camera direction parallel to the ground plane)\n    if (groundPt) {\n      pt = groundPt;\n    }\n  } else {\n    if (cutPlane) {\n      var p = cutPlane;\n\n      var dir = camera.target.clone().sub(camera.position).normalize();\n      var denominator = dir.dot(p);\n\n      if (denominator !== 0) {\n        var t = -(camera.position.clone().dot(p) + p.w) / denominator;\n        pt = worldBox.clampPoint(dir.multiplyScalar(t).add(camera.position));\n      }\n    }\n  }\n  var distance = camera.position.distanceTo(pt);\n\n  return deviceHeight / (2 * distance * Math.tan(THREE.Math.degToRad(camera.fov * 0.5)));\n}\n\n// Note: The camera world matrix must be up-to-date\n//  @param {Vec3d}  vpVec         - ray direction in viewport coords\n//  @param {Camera} camera\n//  @param {string} worldUp       - main axis of up-vector, i.e., \"x\", \"y\", or \"z\".\n//  @param {Box3}   modelBox      - Used to derive min-elevation (where ground is assumed)\nfunction intersectGroundViewport(vpVec, camera, worldUpName, modelBox) {\n\n  var vector = vpVec;\n\n  // set two vectors with opposing z values\n  vector.z = -1.0;\n  var end = new THREE.Vector3(vector.x, vector.y, 1.0);\n  vector = vector.unproject(camera);\n  end = end.unproject(camera);\n\n  // find direction from vector to end\n  end.sub(vector).normalize();\n\n  var dir = end;\n\n  //Is the direction parallel to the ground plane?\n  //Then we fail.\n  if (Math.abs(dir[worldUpName]) < 1e-6)\n  return null;\n\n  var rayOrigin;\n  if (camera.isPerspective) {\n    rayOrigin = camera.position;\n  } else\n  {\n    rayOrigin = vector;\n  }\n\n  var baseElev = modelBox ? modelBox.min[worldUpName] : 0;\n  var distance = (baseElev - rayOrigin[worldUpName]) / dir[worldUpName];\n\n  //2D drawing, intersect the plane\n  dir.multiplyScalar(distance);\n  dir.add(rayOrigin);\n\n  return dir;\n}\n\n\n/**\n   * Returns a new matrix that transforms points from the loaded 2D model\n   * into a normalized coordinate space [0..1].\n   *\n   * @param {THREE.Box3} bbox - Optional - Compute the normalizing matrix according to the given bounding box.\n   *\n   * @returns {THREE.Matrix4}\n   * @private\n   */\nfunction getNormalizingMatrix(model, bbox) {\n\n  bbox = bbox || model.getData().bbox;\n\n  var trans = new THREE.Matrix4();\n  trans.makeTranslation(-bbox.min.x, -bbox.min.y, -bbox.min.z);\n\n  var delta = new THREE.Vector3(0, 0, 0).subVectors(bbox.max, bbox.min);\n  var scale = new THREE.Matrix4();\n  scale.makeScale(1 / delta.x, 1 / delta.y, 1);\n\n  var res = new THREE.Matrix4();\n  res.multiplyMatrices(scale, trans);\n  return res;\n}\n\n\n// @param {THREE.Vector3} p\n// @param {THREE.Vector3} bboxMin\n// @param {THREE.Vector3} bboxMax\n// @returns {Number} Squared distance of the bbox to p\nfunction pointToMinMaxBoxDistance2(p, boxMin, boxMax) {\n\n  // compute the point within bbox that is nearest to p by clamping against box\n  var nearest = p.clone();\n  nearest.max(boxMin);\n  nearest.min(boxMax);\n\n  // return squared length of the difference vector\n  return nearest.distanceToSquared(p);\n}\n\n// @param {THREE.Vector3} p\n// @param {THREE.Box3} bboxMin\n// @returns {Number} Squared distance of the bbox to p\nfunction pointToBoxDistance2(p, box) {\n  return pointToMinMaxBoxDistance2(p, box.min, box.max);\n}\n\nexport var SceneMath = {\n  box2CutPlanes: box2CutPlanes,\n  getPixelsPerUnit: getPixelsPerUnit,\n  intersectGroundViewport: intersectGroundViewport,\n  getNormalizingMatrix: getNormalizingMatrix,\n  pointToMinMaxBoxDistance2: pointToMinMaxBoxDistance2,\n  pointToBoxDistance2: pointToBoxDistance2 };","export var SelectionMode = {\n  LEAF_OBJECT: 0,\n  FIRST_OBJECT: 1,\n  LAST_OBJECT: 2 };","/**\n * Maintains a sorted list of objects or values. \n * If objects are used, less must be a function(a,b) that \n * defines an order on all objects. \n * \n * It is valid to add multiple object that are equal wrt. to less operator.\n *\n * @constructor\n */\nexport function SortedList(less) {\n\n  // use custom or default less operator    \n  var _less = less ? less : function (a, b) {return a < b;};\n\n  // all inserted objects, not sorted\n  var _values = [];\n\n  // array of indices into values, sorted by less operator\n  var _orderIndices = [];\n\n  // Returns an index to the first element in this.orderIndices that points to\n  // an object o that is greater or equal than the given value, i.e. !less(o, value)\n  // If no such object is found, it returns the range end index.\n  function binarySearch(\n  value, // object to search for\n  rangeBegin, // int: define range in this.orderIndices. highEnd is exclusive\n  rangeEnd // \n  ) {\n    // use full array by default\n    if (!rangeBegin) rangeBegin = 0;\n    if (!rangeEnd) rangeEnd = _orderIndices.length;\n\n    // handle empty range\n    if (rangeBegin >= rangeEnd) {\n      return rangeEnd;\n    }\n\n    // simple case: range contains just a single value\n    if (rangeEnd === rangeBegin + 1) {\n\n      // get only elem in this range\n      var elem = _values[_orderIndices[rangeBegin]];\n\n      if (_less(elem, value)) {\n        // object is still smaller. \n        return rangeEnd;\n      } else {\n        return rangeBegin;\n      }\n    }\n\n    // split range in the middle\n    var mid = parseInt(rangeBegin + (rangeEnd - rangeBegin) / 2);\n\n    // Note: mid-1 is always valid, because the rangeLength is always >2 when reaching this\n\n    // get last value of lower half-range\n    var lowerRangeMax = _values[_orderIndices[mid - 1]];\n\n    if (_less(value, lowerRangeMax)) {\n      // max of lower range is already greater => result index must be in the lower half\n      return binarySearch(value, rangeBegin, mid);\n    } else if (_less(lowerRangeMax, value)) {\n      // evenl lower-range max is still smaller => mid object must be in the upper range\n      return binarySearch(value, mid, rangeEnd);\n    } else {\n      // last object in the lower range is identical with value\n      return mid - 1;\n    }\n  }\n\n  this.add = function (val) {\n\n    // find index into this.orderIndices that points to the last\n    // object with identical or lower value.\n    var index = binarySearch(val);\n\n    if (index == _orderIndices.length) {\n      // value is not in the list yet and is larger than all values so far\n      // => append order index \n      _values.push(val);\n      _orderIndices.push(_values.length - 1);\n      return;\n    }\n\n    // append new object and insert sort index at the right position\n    _values.push(val);\n    _orderIndices.splice(index, 0, _values.length - 1);\n  };\n\n  this.size = function () {return _orderIndices.length;};\n\n  // enables to traverse by ascending order using indices 0,...,size()-1\n  this.get = function (index) {\n    return _values[_orderIndices[index]];\n  };\n\n  // removes the element at the given index in 0,...,size()-1.\n  // Note that the index of an object may vary when inserting others,\n  // because the indices are defined via the sorting order.\n  // E.g., removeAt(0) removes the smallest value.\n  this.removeAt = function (i) {\n    var index = _orderIndices[i];\n\n    // remove value at index. Note that the indexing of this.values\n    // must not be changed, because our sort-indices would become invalid.\n    _values[index] = undefined;\n\n    // remove order index \n    _orderIndices.splice(i, 1);\n  };\n\n  // returns a string that enumerates all values.\n  // (only works for numeric values)\n  this.toString = function () {\n    var string = \"\";\n    for (var i = 0, iEnd = this.size(); i < iEnd; ++i) {\n      string += this.get(i);\n      if (i < iEnd - 1) string += \", \";\n    }\n    return string;\n  };\n}","import { enumMeshTriangles, enumMeshLines, enumMeshVertices } from './VertexEnumerator';\nimport * as THREE from \"three\";\n\nvar inverseMatrix;\nvar ray;\n\nvar vA;\nvar vB;\nvar vC;\n\nfunction init_three() {\n\n  if (!inverseMatrix) {\n    inverseMatrix = new THREE.Matrix4();\n    ray = new THREE.Ray();\n\n    vA = new THREE.Vector3();\n    vB = new THREE.Vector3();\n    vC = new THREE.Vector3();\n  }\n}\n\nfunction meshRayCast(mesh, raycaster, intersects) {\n\n  init_three();\n\n  var geometry = mesh.geometry;\n\n  if (!geometry)\n  return;\n\n  var material = mesh.material;\n\n  var side = material ? material.side : THREE.FrontSide;\n\n  inverseMatrix.getInverse(mesh.matrixWorld);\n  ray.copy(raycaster.ray).applyMatrix4(inverseMatrix);\n\n  var precision = raycaster.precision;\n  var intersectionPoint, distance;\n\n  enumMeshTriangles(geometry, function (vA, vB, vC, a, b, c, nA, nB, nC, idx) {\n    if (side === THREE.BackSide) {\n\n      intersectionPoint = ray.intersectTriangle(vC, vB, vA, true);\n\n    } else {\n\n      intersectionPoint = ray.intersectTriangle(vA, vB, vC, side !== THREE.DoubleSide);\n\n    }\n\n    if (intersectionPoint === null) return;\n\n    intersectionPoint.applyMatrix4(mesh.matrixWorld);\n\n    distance = raycaster.ray.origin.distanceTo(intersectionPoint);\n\n    if (distance < precision || distance < raycaster.near || distance > raycaster.far) return;\n\n    intersects.push({\n\n      distance: distance,\n      point: intersectionPoint,\n      face: new THREE.Face3(a, b, c, THREE.Triangle.normal(vA, vB, vC)),\n      faceIndex: idx,\n      fragId: mesh.fragId,\n      dbId: mesh.dbId,\n      object: mesh });\n\n\n  });\n\n}\n\n\nfunction lineRayCast(mesh, raycaster, intersects) {\n\n  init_three();\n\n  var geometry = mesh.geometry;\n\n  if (!geometry)\n  return;\n\n  var precision = raycaster.linePrecision;\n  if (mesh.isWideLine) {\n    if (mesh.material.linewidth) {\n      precision = mesh.material.linewidth;\n    } else if (mesh.geometry.lineWidth) {\n      precision = mesh.geometry.lineWidth;\n    }\n  }\n  var precisionSq = precision * precision;\n\n  inverseMatrix.getInverse(mesh.matrixWorld);\n  ray.copy(raycaster.ray).applyMatrix4(inverseMatrix);\n\n  var interSegment = new THREE.Vector3();\n  var interRay = new THREE.Vector3();\n\n  if (geometry instanceof THREE.BufferGeometry) {\n\n    enumMeshLines(geometry, function (vStart, vEnd, a, b, idx) {\n\n      var distance, distSq;\n\n      ray.distanceSqToSegment(vStart, vEnd, interRay, interSegment);\n\n      interSegment.applyMatrix4(mesh.matrixWorld);\n      interRay.applyMatrix4(mesh.matrixWorld);\n\n      distSq = interSegment.distanceToSquared(interRay);\n\n      if (distSq > precisionSq) return;\n\n      distance = raycaster.ray.origin.distanceTo(interSegment);\n\n      if (distance < raycaster.near || distance > raycaster.far) return;\n\n      intersects.push({\n\n        distance: distance,\n        // What do we want? intersection point on the ray or on the segment??\n        // point: raycaster.ray.at( distance ),\n        point: interSegment,\n        face: { a: a, b: b },\n        faceIndex: idx,\n        fragId: mesh.fragId,\n        dbId: mesh.dbId,\n        object: mesh });\n\n\n    });\n\n\n  }\n}\n\n/// c.f. THREE.PointCloud.prototype.raycast()\nfunction pointRayCast(mesh, raycaster, intersects) {\n\n  init_three();\n\n  var geometry = mesh.geometry;\n  if (!geometry)\n  return;\n\n  inverseMatrix.getInverse(mesh.matrixWorld);\n  ray.copy(raycaster.ray).applyMatrix4(inverseMatrix);\n\n  var precision = raycaster.precision;\n\n  var pickRadius = raycaster.params.PointCloud.threshold;\n  if (!pickRadius) pickRadius = 1;\n  pickRadius *= Math.max(3, geometry.pointSize); // small point sizes are too hard to pick!\n  pickRadius /= 4;\n\n  if (geometry instanceof THREE.BufferGeometry) {\n\n    enumMeshVertices(geometry, function (point, normal, uv, idx) {\n      // points are drawn as squares, but treat them as circles\n      // to save having to calculate the orientation\n      var distanceToRay = ray.distanceToPoint(point);\n      if (distanceToRay > pickRadius) {\n        return;\n      }\n\n      var intersectionPoint = ray.closestPointToPoint(point);\n      if (intersectionPoint === null) return;\n      intersectionPoint.applyMatrix4(mesh.matrixWorld);\n\n      var distance = raycaster.ray.origin.distanceTo(intersectionPoint);\n      if (distance < precision || distance < raycaster.near || distance > raycaster.far) {\n        return;\n      }\n\n      intersects.push({\n\n        distance: distance,\n        point: point,\n        face: { a: idx },\n        faceIndex: idx,\n        fragId: mesh.fragId,\n        dbId: mesh.dbId,\n        object: mesh });\n\n\n\n    });\n\n  } else {\n    // not implemented - other geometry types\n  }\n\n}\n\n\nfunction rayCast(mesh, raycaster, intersects) {\n\n  if (mesh.isLine || mesh.isWideLine)\n  lineRayCast(mesh, raycaster, intersects);else\n  if (mesh.isPoint)\n  pointRayCast(mesh, raycaster, intersects);else\n\n  meshRayCast(mesh, raycaster, intersects);\n\n}\n\n\nfunction intersectObjectRec(object, raycaster, intersects, recursive) {\n\n  if (object instanceof THREE.Mesh)\n  rayCast(object, raycaster, intersects); //use our extended impl in case of Mesh.\n  else\n    object.raycast(raycaster, intersects); //fall back to normal THREE.js impl\n\n  if (recursive === true) {\n\n    var children = object.children;\n\n    for (var i = 0, l = children.length; i < l; i++) {\n\n      intersectObjectRec(children[i], raycaster, intersects, true);\n\n    }\n\n  }\n\n}\n\nvar descSort = function descSort(a, b) {\n  return a.distance - b.distance;\n};\n\nfunction intersectObject(object, raycaster, intersects, recursive) {\n  intersectObjectRec(object, raycaster, intersects, recursive);\n  intersects.sort(descSort);\n}\n\n\nexport var VBIntersector = {\n  meshRayCast: meshRayCast,\n  lineRayCast: lineRayCast,\n  rayCast: rayCast,\n  intersectObject: intersectObject };","\n\"use strict\";\n\nimport * as THREE from \"three\";\n\nvar TAU = Math.PI * 2;\n\n//Constants duplicated from src/lmvtk/VertexBufferBuilder.js\nvar VBB_GT_TRIANGLE_INDEXED = 0,\nVBB_GT_LINE_SEGMENT = 1,\nVBB_GT_ARC_CIRCULAR = 2,\nVBB_GT_ARC_ELLIPTICAL = 3,\nVBB_GT_TEX_QUAD = 4,\nVBB_GT_ONE_TRIANGLE = 5;\n\nvar VBB_INSTANCED_FLAG = 0, // this is intentionally 0 for the instancing case!\nVBB_SEG_START_RIGHT = 0, // this starts intentionally at 0!\nVBB_SEG_START_LEFT = 1,\nVBB_SEG_END_RIGHT = 2,\nVBB_SEG_END_LEFT = 3;\n\nvar VBB_COLOR_OFFSET = 6,\nVBB_DBID_OFFSET = 7,\nVBB_FLAGS_OFFSET = 8,\nVBB_LAYER_VP_OFFSET = 9;\n\n/**\n                          * Initializes a \"view\" into a compacted interleaved vertex buffer array using our custom 2D vertex layout.\n                          * See src/lmvtk/VertexBufferBuilder.js for more details.\n                          */\nexport function VertexBufferReader(geometry)\n{var _geometry$tIdColor,_geometry$tIdColor$im,_this = this;\n  this.vb = geometry.vb.buffer;\n  this.vbf = new Float32Array(this.vb);\n  this.vbi = new Int32Array(this.vb);\n  this.vbs = new Uint16Array(this.vb);\n\n  this.ib = geometry.ib;\n\n  this.stride = geometry.vbstride;\n  this.vcount = this.vbf.length / this.stride;\n\n  this.useInstancing = geometry.numInstances > 0;\n  this.useCompactBuffers = geometry.unpackXform;\n  this.texData = this.useCompactBuffers && ((_geometry$tIdColor = geometry.tIdColor) === null || _geometry$tIdColor === void 0 ? void 0 : (_geometry$tIdColor$im = _geometry$tIdColor.image) === null || _geometry$tIdColor$im === void 0 ? void 0 : _geometry$tIdColor$im.data) && new Uint32Array(geometry.tIdColor.image.data.buffer);\n\n  // Does the geom use interleaved vb?\n  // Used by FragmentList.updateVertexBufferForThemingAndGhosting which only\n  // workes with interleaved vb\n  this.isInterleavedVb = function () {\n    var attr = geometry.attributes;\n    if (!attr) return false;\n\n    var atLayerVp = attr.layerVp4b;\n    var atFlags = attr.flags4b;\n\n    if (_this.useCompactBuffers) {\n      var atIdColors = attr.uvIdColor;\n      return atIdColors && atLayerVp && atFlags;\n    } else {\n      var atColors = attr.color4b;\n      var atIds = attr.dbId4b;\n      return atColors && atIds && atLayerVp && atFlags;\n    }\n  }();\n};\n\nVertexBufferReader.prototype.getDbIdAt = function (vindex) {\n  if (this.texData) {\n    return this.texData[this.vbs[vindex * this.stride * 2 + VBB_DBID_OFFSET]];\n  }\n  return this.vbi[vindex * this.stride + VBB_DBID_OFFSET];\n};\n\nVertexBufferReader.prototype.getColorAt = function (vindex) {\n  if (this.texData) {\n    return this.texData[this.vbs[vindex * this.stride * 2 + VBB_COLOR_OFFSET]];\n  }\n  return this.vbi[vindex * this.stride + VBB_COLOR_OFFSET];\n};\n\nVertexBufferReader.prototype.getVertexFlagsAt = function (vindex) {\n  if (this.texData) {\n    return this.vbi[vindex * this.stride + 4];\n  }\n  return this.vbi[vindex * this.stride + VBB_FLAGS_OFFSET];\n};\n\nVertexBufferReader.prototype.getLayerIndexAt = function (vindex) {\n  if (this.texData) {\n    return this.vbi[vindex * this.stride + 5] & 0xffff;\n  }\n  return this.vbi[vindex * this.stride + VBB_LAYER_VP_OFFSET] & 0xffff;\n};\n\nVertexBufferReader.prototype.getViewportIndexAt = function (vindex) {\n  if (this.texData) {\n    return this.vbi[vindex * this.stride + 5] >> 16 & 0xffff;\n  }\n  return this.vbi[vindex * this.stride + VBB_LAYER_VP_OFFSET] >> 16 & 0xffff;\n};\n\nVertexBufferReader.prototype.decodeLineAt = function (vindex, layer, vpId, callback)\n{\n  if (!callback.onLineSegment) {return;}\n\n  if (this.useCompactBuffers) {\n    var vertexOffset = this.stride * vindex * 2;\n    var x0 = this.useCompactBuffers.x * this.vbs[vertexOffset] / 65535 + this.useCompactBuffers.z;\n    var y0 = this.useCompactBuffers.y * this.vbs[vertexOffset + 1] / 65535 + this.useCompactBuffers.w;\n    var angle = this.vbs[vertexOffset + 2] / 65535 * TAU - Math.PI;\n    var distAlong = this.vbs[vertexOffset + 3] / 65535 * Math.max(this.useCompactBuffers.x, this.useCompactBuffers.y);\n    var lineWidth = this.vbs[vertexOffset + 4] / 32767 * Math.max(this.useCompactBuffers.x, this.useCompactBuffers.y) * 2.0;\n  } else {\n    var baseOffset = this.stride * vindex;\n    var x0 = this.vbf[baseOffset];\n    var y0 = this.vbf[baseOffset + 1];\n    var angle = this.vbf[baseOffset + 2] * TAU - Math.PI; // decode angle: see VertexBufferBuilder.addVertexLine\n    var distAlong = this.vbf[baseOffset + 3];\n    var lineWidth = this.vbf[baseOffset + 4] * 2.0;\n  }\n\n  var x1 = x0 + distAlong * Math.cos(angle);\n  var y1 = y0 + distAlong * Math.sin(angle);\n\n  callback.onLineSegment(x0, y0, x1, y1, vpId, lineWidth);\n};\n\nVertexBufferReader.prototype.decodeCircularArcAt = function (vindex, layer, vpId, callback)\n{\n  if (!callback.onCircularArc) {return;}\n\n  if (this.useCompactBuffers) {\n    var vertexOffset = this.stride * vindex * 2;\n    var cx = this.useCompactBuffers.x * this.vbs[vertexOffset] / 65535 + this.useCompactBuffers.z;\n    var cy = this.useCompactBuffers.y * this.vbs[vertexOffset + 1] / 65535 + this.useCompactBuffers.w;\n    var start = this.vbs[vertexOffset + 2] / 65535 * TAU;\n    var end = this.vbs[vertexOffset + 3] / 65535 * TAU;\n    var radius = this.vbs[vertexOffset + 5] / 65535 * Math.max(this.useCompactBuffers.x, this.useCompactBuffers.y);\n  } else {\n    var baseOffset = this.stride * vindex;\n    var cx = this.vbf[baseOffset];\n    var cy = this.vbf[baseOffset + 1];\n    var start = this.vbf[baseOffset + 2] * TAU;\n    var end = this.vbf[baseOffset + 3] * TAU;\n    var radius = this.vbf[baseOffset + 5];\n  }\n\n  callback.onCircularArc(cx, cy, start, end, radius, vpId);\n};\n\nVertexBufferReader.prototype.decodeEllipticalArcAt = function (vindex, layer, vpId, callback)\n{\n  if (!callback.onEllipticalArc) {return;}\n\n  // Note: compaction will not happen for the VBB_GT_ARC_ELLIPTICAL\n  var baseOffset = this.stride * vindex;\n  var cx = this.vbf[baseOffset];\n  var cy = this.vbf[baseOffset + 1];\n  var start = this.vbf[baseOffset + 2] * TAU;\n  var end = this.vbf[baseOffset + 3] * TAU;\n  var major = this.vbf[baseOffset + 5];\n  var minor = this.vbf[baseOffset + 10];\n  var tilt = this.vbf[baseOffset + 11];\n\n  callback.onEllipticalArc(cx, cy, start, end, major, minor, tilt, vpId);\n};\n\nVertexBufferReader.prototype.decodeTexQuadAt = function (vindex, layer, vpId, callback)\n{\n  if (!callback.onTexQuad) {return;}\n\n  if (this.useCompactBuffers) {\n    var vertexOffset = this.stride * vindex * 2;\n    var centerX = this.useCompactBuffers.x * this.vbs[vertexOffset] / 65535 + this.useCompactBuffers.z;\n    var centerY = this.useCompactBuffers.y * this.vbs[vertexOffset + 1] / 65535 + this.useCompactBuffers.w;\n    var rotation = this.vbs[vertexOffset + 2] / 65535 * TAU;\n    var width = this.vbs[vertexOffset + 3] / 65535 * Math.max(this.useCompactBuffers.x, this.useCompactBuffers.y);\n    var height = this.vbs[vertexOffset + 4] / 65535 * Math.max(this.useCompactBuffers.x, this.useCompactBuffers.y);\n  } else {\n    var baseOffset = this.stride * vindex;\n    var centerX = this.vbf[baseOffset];\n    var centerY = this.vbf[baseOffset + 1];\n    // yes, this is in a different order than output, following VertexBufferBuilder's order\n    var rotation = this.vbf[baseOffset + 2] * TAU;\n    var width = this.vbf[baseOffset + 3];\n    var height = this.vbf[baseOffset + 4];\n  }\n\n  callback.onTexQuad(centerX, centerY, width, height, rotation, vpId);\n};\n\nVertexBufferReader.prototype.decodeOneTriangleAt = function (vindex, layer, vpId, callback)\n{\n  if (!callback.onOneTriangle) {return;}\n\n  if (this.useCompactBuffers) {\n    var vertexOffset = this.stride * vindex * 2;\n    var x1 = this.useCompactBuffers.x * this.vbs[vertexOffset] / 65535 + this.useCompactBuffers.z;\n    var y1 = this.useCompactBuffers.y * this.vbs[vertexOffset + 1] / 65535 + this.useCompactBuffers.w;\n    var x2 = this.useCompactBuffers.x * this.vbs[vertexOffset + 2] / 65535 + this.useCompactBuffers.z;\n    var y2 = this.useCompactBuffers.y * this.vbs[vertexOffset + 3] / 65535 + this.useCompactBuffers.w;\n    var x3 = this.useCompactBuffers.x * this.vbs[vertexOffset + 4] / 65535 + this.useCompactBuffers.z;\n    var y3 = this.useCompactBuffers.y * this.vbs[vertexOffset + 5] / 65535 + this.useCompactBuffers.w;\n  } else {\n    var baseOffset = this.stride * vindex;\n    var x1 = this.vbf[baseOffset];\n    var y1 = this.vbf[baseOffset + 1];\n    var x2 = this.vbf[baseOffset + 2];\n    var y2 = this.vbf[baseOffset + 3];\n    var x3 = this.vbf[baseOffset + 4];\n    var y3 = this.vbf[baseOffset + 5];\n  }\n\n  callback.onOneTriangle(x1, y1, x2, y2, x3, y3, vpId);\n};\n\n\nVertexBufferReader.prototype.decodeTriangleIndexed = function (vi0, vi1, vi2, layer, vpId, callback)\n{\n  if (!callback.onOneTriangle) {return;}\n\n  if (this.useCompactBuffers) {\n    var vertexOffset = this.stride * vi0 * 2;\n    var x1 = this.useCompactBuffers.x * this.vbs[vertexOffset] / 65535 + this.useCompactBuffers.z;\n    var y1 = this.useCompactBuffers.y * this.vbs[vertexOffset + 1] / 65535 + this.useCompactBuffers.w;\n\n    vertexOffset = this.stride * vi1 * 2;\n    var x2 = this.useCompactBuffers.x * this.vbs[vertexOffset] / 65535 + this.useCompactBuffers.z;\n    var y2 = this.useCompactBuffers.y * this.vbs[vertexOffset + 1] / 65535 + this.useCompactBuffers.w;\n\n    vertexOffset = this.stride * vi2 * 2;\n    var x3 = this.useCompactBuffers.x * this.vbs[vertexOffset] / 65535 + this.useCompactBuffers.z;\n    var y3 = this.useCompactBuffers.y * this.vbs[vertexOffset + 1] / 65535 + this.useCompactBuffers.w;\n  } else {\n    var baseOffset = this.stride * vi0;\n    var x1 = this.vbf[baseOffset];\n    var y1 = this.vbf[baseOffset + 1];\n\n    baseOffset = this.stride * vi1;\n    var x2 = this.vbf[baseOffset];\n    var y2 = this.vbf[baseOffset + 1];\n\n    baseOffset = this.stride * vi2;\n    var x3 = this.vbf[baseOffset];\n    var y3 = this.vbf[baseOffset + 1];\n  }\n\n  callback.onOneTriangle(x1, y1, x2, y2, x3, y3, vpId);\n};\n\n\n// used by the snapper and by the bounds finder\nVertexBufferReader.prototype.enumGeomsForObject = function (dbId, callback)\n{\n  if (this.useInstancing) {\n\n    //When instancing is used, each geometry primitive is encoded into a single vertex\n    //and there is no index buffer.\n\n    var i = 0;\n    while (i < this.vcount) {\n      var flag = this.getVertexFlagsAt(i);\n\n      //var vertexId  = (flag >>  0) & 0xff;        //  8 bit\n      var geomType = flag >> 8 & 0xff; //  8 bit\n      //var linePattern = (flag >> 16) & 0xff;      //  8 bit\n      var layerId = this.getLayerIndexAt(i); // 16 bit\n      var vpId = this.getViewportIndexAt(i); // 16 bit     \n      var visible = this.getDbIdAt(i) === dbId;\n      if (visible) {\n        switch (geomType) {\n          case VBB_GT_LINE_SEGMENT:this.decodeLineAt(i, layerId, vpId, callback);break;\n          case VBB_GT_ARC_CIRCULAR:this.decodeCircularArcAt(i, layerId, vpId, callback);break;\n          case VBB_GT_ARC_ELLIPTICAL:this.decodeEllipticalArcAt(i, layerId, vpId, callback);break; //  compaction is not performed\n          case VBB_GT_TEX_QUAD:this.decodeTexQuadAt(i, layerId, vpId, callback);break;\n          case VBB_GT_ONE_TRIANGLE:this.decodeOneTriangleAt(i, layerId, vpId, callback);break;\n          default:break;}\n\n      }\n\n      //In the case of instancing, there is no vertex duplication and no index buffer, we just\n      //move to the next vertex\n      i += 1;\n    }\n  } else {\n\n    var i = 0;\n    while (i < this.ib.length) {\n      var vi = this.ib[i];\n      var flag = this.getVertexFlagsAt(vi);\n\n      //var vertexId    = (flag >>  0) & 0xff;        //  8 bit\n      var geomType = flag >> 8 & 0xff; //  8 bit\n      //var linePattern = (flag >> 16) & 0xff;        //  8 bit\n      var layerId = this.getLayerIndexAt(vi); // 16 bit\n      var vpId = this.getViewportIndexAt(vi); // 16 bit\n\n      var visible = this.getDbIdAt(vi) === dbId;\n\n      if (geomType === VBB_GT_TRIANGLE_INDEXED) {\n\n        //Triangles are encoded in three vertices (like a simple mesh) instead of 4 like everything else\n\n        if (visible) {\n          this.decodeTriangleIndexed(this.ib[i], this.ib[i + 1], this.ib[i + 2], layerId, vpId, callback);\n        }\n\n        //Advance to the next primitive\n        i += 3;\n\n      } else {\n\n        if (visible) {\n          switch (geomType) {\n            case VBB_GT_LINE_SEGMENT:this.decodeLineAt(vi, layerId, vpId, callback);break;\n            case VBB_GT_ARC_CIRCULAR:this.decodeCircularArcAt(vi, layerId, vpId, callback);break;\n            case VBB_GT_ARC_ELLIPTICAL:this.decodeEllipticalArcAt(vi, layerId, vpId, callback);break;\n            case VBB_GT_TEX_QUAD:this.decodeTexQuadAt(vi, layerId, vpId, callback);break;\n            case VBB_GT_ONE_TRIANGLE:this.decodeOneTriangleAt(vi, layerId, vpId, callback);break;\n            default:break;}\n\n        }\n\n        //Skip duplicate vertices (when not using instancing and the geometry is not a simple polytriangle,\n        //each vertex is listed four times with a different vertexId flag\n        i += 6;\n      }\n\n\n    }\n  }\n\n};\n\n\n/**\n    * Used by the bounds finder.\n    * @param {array[number]} layerIdsVisible - list of layer ids that are visible\n    * @param {function} callback\n    * @private\n    */\nVertexBufferReader.prototype.enumGeomsForVisibleLayer = function (layerIdsVisible, callback)\n{\n  var filter = function filter(dbId, layerId, viewportId) {\n    return !layerIdsVisible || layerId !== 0 && layerIdsVisible.indexOf(layerId) !== -1;\n  };\n  this.enumGeoms(filter, callback);\n};\n\n\n/**\n    * Enumerate all geometric primitives that match the given filter.\n    * @param {function} [filter] - function(dbId, layerId, viewportId): Filter function to define a subset of primitives to include. By default, all geometry is included.\n    * @param {function} callback\n    * @private\n    */\nVertexBufferReader.prototype.enumGeoms = function (filter, callback)\n{\n  if (this.useInstancing) {\n\n    //When instancing is used, each geometry primitive is encoded into a single vertex\n    //and there is no index buffer.\n\n    var i = 0;\n    while (i < this.vcount) {\n      var flag = this.getVertexFlagsAt(i);\n\n      //var vertexId    = (flag >>  0) & 0xff;        //  8 bit\n      var geomType = flag >> 8 & 0xff; //  8 bit\n      //var linePattern = (flag >> 16) & 0xff;        //  8 bit\n      var layerId = this.getLayerIndexAt(i); // 16 bit\n      var vpId = this.getViewportIndexAt(i); // 16 bit\n      var dbId = this.getDbIdAt(i);\n\n      // Get the bounds of only the visible layers. Ignore layer 0, which is always the page.\n      // If layerId visibility is not set, consider the layer visible.\n      var visible = !filter || filter(dbId, layerId, vpId);\n      if (visible) {\n        switch (geomType) {\n          case VBB_GT_LINE_SEGMENT:this.decodeLineAt(i, layerId, vpId, callback);break;\n          case VBB_GT_ARC_CIRCULAR:this.decodeCircularArcAt(i, layerId, vpId, callback);break;\n          case VBB_GT_ARC_ELLIPTICAL:this.decodeEllipticalArcAt(i, layerId, vpId, callback);break;\n          case VBB_GT_TEX_QUAD:this.decodeTexQuadAt(i, layerId, vpId, callback);break;\n          case VBB_GT_ONE_TRIANGLE:this.decodeOneTriangleAt(i, layerId, vpId, callback);break;\n          default:break;}\n\n      }\n\n      //In the case of instancing, there is no vertex duplication and no index buffer, we just\n      //move to the next vertex\n      i += 1;\n    }\n  } else {\n\n    var i = 0;\n    while (i < this.ib.length) {\n      var vi = this.ib[i];\n      var flag = this.getVertexFlagsAt(vi);\n\n      //var vertexId    = (flag >>  0) & 0xff;        //  8 bit\n      var geomType = flag >> 8 & 0xff; //  8 bit\n      //var linePattern = (flag >> 16) & 0xff;        //  8 bit\n      var layerId = this.getLayerIndexAt(vi); // 16 bit\n      var vpId = this.getViewportIndexAt(vi); // 16 bit\n      var dbId = this.getDbIdAt(vi);\n\n      // Get the bounds of only the visible layers. Ignore layer 0, which is always the page.\n      // If layerId visibility is not set, consider the layer visible.\n      var visible = !filter || filter(dbId, layerId, vpId);\n\n      if (geomType === VBB_GT_TRIANGLE_INDEXED) {\n\n        //Triangles are encoded in three vertices (like a simple mesh) instead of 4 like everything else\n\n        if (visible) {\n          this.decodeTriangleIndexed(this.ib[i], this.ib[i + 1], this.ib[i + 2], layerId, vpId, callback);\n        }\n\n        //Advance to the next primitive\n        i += 3;\n\n      } else {\n\n        if (visible) {\n          switch (geomType) {\n            case VBB_GT_LINE_SEGMENT:this.decodeLineAt(vi, layerId, vpId, callback);break;\n            case VBB_GT_ARC_CIRCULAR:this.decodeCircularArcAt(vi, layerId, vpId, callback);break;\n            case VBB_GT_ARC_ELLIPTICAL:this.decodeEllipticalArcAt(vi, layerId, vpId, callback);break;\n            case VBB_GT_TEX_QUAD:this.decodeTexQuadAt(vi, layerId, vpId, callback);break;\n            case VBB_GT_ONE_TRIANGLE:this.decodeOneTriangleAt(vi, layerId, vpId, callback);break;\n            default:break;}\n\n        }\n\n        //Skip duplicate vertices (when not using instancing and the geometry is not a simple polytriangle,\n        //each vertex is listed four times with a different vertexId flag\n        i += 6;\n      }\n\n    }\n  }\n\n};\n\n\n\n/**\n    * Callback class for calculating bounds of 2D objects via VertexBufferReader\n    * @private\n    */\nexport function BoundsCallback(bounds) {\n  this.bounds = bounds;\n  // workspace, so we don't reallocate this each time\n  this.point = new THREE.Vector4();\n  this.point.z = 0.0;\n  this.point.w = 1.0; // it's a point, not a vector\n}\n\nBoundsCallback.prototype.onVertex = function (cx, cy, vpId) {\n  this.point.x = cx;\n  this.point.y = cy;\n  this.bounds.expandByPoint(this.point);\n};\n\nBoundsCallback.prototype.onLineSegment = function (x1, y1, x2, y2, vpId) {\n  this.onVertex(x1, y1);\n  this.onVertex(x2, y2);\n};\n\nBoundsCallback.prototype.onCircularArc = function (cx, cy, start, end, radius, vpId) {\n  this.onEllipticalArc(cx, cy, start, end, radius, radius, 0.0, vpId);\n};\n\nBoundsCallback.prototype.onEllipticalArc = function (cx, cy, start, end, major, minor, tilt, vpId) {\n  if (tilt == 0.0) {\n    // does start and end make a full ellipse?\n    if (start <= 0 && end >= 2.0 * Math.PI - 0.00001) {\n      // full way around, simply treat it like a rectangle\n      this.onTexQuad(cx, cy, 2 * major, 2 * minor, tilt, vpId);\n    } else {\n      // Not a full ellipse. We take the start and end points and also figure\n      // out the four \"compass rose\" points that are between these two locations.\n      // The start and end locations often exist as separate vertices so would\n      // already be included, but for some line types they may not exist, so we\n      // include them here.\n      this.point.x = cx + Math.cos(start) * major;\n      this.point.y = cy + Math.sin(start) * minor;\n      this.bounds.expandByPoint(this.point);\n      this.point.x = cx + Math.cos(end) * major;\n      this.point.y = cy + Math.sin(end) * minor;\n      this.bounds.expandByPoint(this.point);\n\n      // now check each NESW compass point, i.e., middle of each edge\n      if (start > end) {\n        // add right edge\n        this.point.x = cx + major;\n        this.point.y = cy;\n        this.bounds.expandByPoint(this.point);\n        // make start < end for the rest of the tests\n        start -= 2.0 * Math.PI;\n      }\n      if (start < 0.5 * Math.PI && end > 0.5 * Math.PI) {\n        // add top edge\n        this.point.x = cx;\n        this.point.y = cy + minor;\n        this.bounds.expandByPoint(this.point);\n      }\n      if (start < Math.PI && end > Math.PI) {\n        // add left edge\n        this.point.x = cx - major;\n        this.point.y = cy;\n        this.bounds.expandByPoint(this.point);\n      }\n      if (start < 1.5 * Math.PI && end > 1.5 * Math.PI) {\n        // add bottom edge\n        this.point.x = cx;\n        this.point.y = cy - minor;\n        this.bounds.expandByPoint(this.point);\n      }\n    }\n  } else {\n    // Has a tilt.\n    // From what we see, you should never reach here, as tilted ellipses are actually\n    // always tessellated. So, we do a fallback: call the onTexQuad with the rotation.\n    // This call will be a pretty good approximation, putting a rotated bounding box\n    // around the whole ellipse. For more accuracy you would need to tessellate the\n    // ellipse and get its points (especially if you don't have a full ellipse).\n    this.onTexQuad(cx, cy, 2 * major, 2 * minor, tilt, vpId);\n\n    // does start and end make a full ellipse?\n    //if ( (start <= 0) && (end >= 2.0 * Math.PI - 0.00001) ) {\n    //}\n  }\n};\n\n// Currently this case does not actually come up, as textured quads, i.e., images, are\n// not something that can be selected, from what data I have tried. So I have not spent\n// any time on the rotated case.\n// TODO: this code is only partially tested: I had problems getting a selectable raster\n// object in a DWG convert to an F2D.\nBoundsCallback.prototype.onTexQuad = function (centerX, centerY, width, height, rotation, vpId) {\n  var halfWidth = 0.5 * width;\n  var halfHeight = 0.5 * width;\n  if (rotation == 0.0) {\n    this.onVertex(centerX - halfWidth, centerY - halfHeight);\n    this.onVertex(centerX + halfWidth, centerY + halfHeight);\n  } else {\n    // A more complex rectangle, rotated. Take the four corners and rotate each\n    // around the center.\n    var rmtx = new THREE.Matrix4(); // Matrix3() does not have enough helper methods\n    var mtx = new THREE.Matrix4();\n    // Take a rectangle centered at the origin, rotate it, translate it to the final\n    // position. Each corner is added to the bounds.\n    rmtx.makeRotationZ(rotation);\n    // put it into the final position:\n    mtx.makeTranslation(centerX, centerY, 0.0);\n    mtx.multiply(rmtx);\n\n    for (var i = 0; i < 4; i++) {\n      this.point.x = i % 2 == 1 ? halfWidth : -halfWidth;\n      this.point.y = i >= 2 ? halfHeight : -halfHeight;\n      this.point.applyMatrix4(mtx);\n      this.bounds.expandByPoint(this.point);\n    }\n  }\n};\n\nBoundsCallback.prototype.onOneTriangle = function (x1, y1, x2, y2, x3, y3, vpId) {\n  this.onVertex(x1, y1);\n  this.onVertex(x2, y2);\n  this.onVertex(x3, y3);\n};","import { logger } from '../../logger/Logger';\n\nvar VBB_COLOR_OFFSET = 6,\nVBB_DBID_OFFSET = 7,\nVBB_FLAGS_OFFSET = 8,\nVBB_LAYER_VP_OFFSET = 9;\n\nvar _toUint32 = new Uint32Array(1);\nfunction toUint32(c) {\n  _toUint32[0] = c;\n  return _toUint32[0];\n}\n\n/**\n   * Initializes a writable view into a compacted interleaved vertex buffer array using our custom 2D vertex layout.\n   * See src/lmvtk/VertexBufferBuilder.js for more details.\n   */\nexport function VertexBufferWriter(geometry)\n{var _geometry$tIdColor,_geometry$tIdColor$im,_this = this;\n  this.geometry = geometry;\n  this.vb = geometry.vb.buffer;\n  this.vbi = new Int32Array(this.vb);\n  this.vbs = new Uint16Array(this.vb);\n\n  this.stride = geometry.vbstride;\n  this.vcount = this.vbi.length / this.stride;\n\n  this.useCompactBuffers = geometry.unpackXform;\n  this.texData = this.useCompactBuffers && ((_geometry$tIdColor = geometry.tIdColor) === null || _geometry$tIdColor === void 0 ? void 0 : (_geometry$tIdColor$im = _geometry$tIdColor.image) === null || _geometry$tIdColor$im === void 0 ? void 0 : _geometry$tIdColor$im.data) && new Uint32Array(geometry.tIdColor.image.data.buffer);\n\n  // only needed for compact vb\n  this.texColMap = function () {\n    if (!_this.texData) return null;\n    var col2Index = {};\n    var seen = new Set();\n    for (var i = 0; i < _this.vcount; ++i) {\n      var index = _this.vbs[i * _this.stride * 2 + VBB_COLOR_OFFSET];\n      if (!seen.has(index)) {\n        col2Index[_this.texData[index]] = index;\n        seen.add(index);\n      }\n    }\n    return col2Index;\n  }();\n\n};\n\nVertexBufferWriter.prototype.setColorAt = function (vindex, newColor) {\n  if (this.texData) {\n    // Add color to compact buffer\n    newColor = toUint32(newColor);\n    if (!(newColor in this.texColMap)) {\n      // Create a new tIdColor buffer with the new color added\n      var oldBuffer = this.texData;\n      if (oldBuffer.length + 1 > 65536) {\n        logger.warn(\"setColorAt() cannot add new color as size limit reached\");\n        return;\n      }\n\n      var newBuffer = new Uint32Array(oldBuffer.length + 1);\n      newBuffer.set(oldBuffer, 0);\n      newBuffer[oldBuffer.length] = newColor; // add new color to end of the texture\n      // Add index of the new color to the map\n      this.texColMap[newColor] = oldBuffer.length;\n\n      // Replace existing tIdColor\n      var tIdColor = new THREE.DataTexture(new Uint8Array(newBuffer.buffer), newBuffer.length, 1,\n      THREE.RGBAFormat, THREE.UnsignedByteType, THREE.UVMapping,\n      THREE.ClampToEdgeWrapping, THREE.ClampToEdgeWrapping, THREE.NearestFilter, THREE.NearestFilter, 0);\n      tIdColor.generateMipmaps = false;\n      tIdColor.flipY = false;\n      tIdColor.needsUpdate = true;\n      this.geometry.tIdColor.dispose();\n      this.geometry.tIdColor = tIdColor;\n      this.texData = new Uint32Array(tIdColor.image.data.buffer);\n      this.geometry.vIdColorTexSize = new THREE.Vector2(newBuffer.length, 1);\n    }\n\n    // set the vertex color\n    this.vbs[vindex * this.stride * 2 + VBB_COLOR_OFFSET] = this.texColMap[newColor];\n  } else {\n    this.vbi[vindex * this.stride + VBB_COLOR_OFFSET] = newColor;\n  }\n};\n\nVertexBufferWriter.prototype.setVertexFlagsAt = function (vindex, flag) {\n  if (this.texData) {\n    this.vbi[vindex * this.stride + 4] = flag;\n  } else {\n    this.vbi[vindex * this.stride + VBB_FLAGS_OFFSET] = flag;\n  }\n};","\n\n//Utility logic for listing vertex data from LmvBufferGeometry interleaved buffers\n\nimport { LmvVector3 } from './LmvVector3';\n\n//These functions work for both workers side interleaved buffer structures\n//and main thread side LmvBufferGeometry instances. The difference in naming\n//if the index attribute on both sides is super annoying and should be cleaned up.\n\n\n/** Works for BufferGeometry as well as THREE.BufferGeometry. Supports interleaved and non-interleaved buffers.\n *   @param {BufferGeometry|THREE.BufferGeometry} geom\n *   @returns {number}\n */\nexport function getVertexCount(geom) {\n  if (geom.vb) {\n    // interleaved\n    return geom.vb.length / geom.vbstride;\n  }\n  // no interleaved buffer. Return count from position attribute or 0\n  return geom.attributes.position ? geom.attributes.position.length : 0;\n}\n\n\nvar _p, _n, _uv;\nvar _normalsMatrix;\n\nexport function enumMeshVertices(geometry, callback, matrix) {\n\n  var attributes = geometry.attributes;\n\n  if (!_p) {\n    _p = new LmvVector3();\n    _n = new LmvVector3();\n    _uv = new LmvVector3();\n  }\n\n  if (matrix) {\n    if (!_normalsMatrix)\n    _normalsMatrix = new THREE.Matrix3();\n\n    _normalsMatrix.getNormalMatrix(matrix);\n  }\n\n  var positions = geometry.vb || attributes.position.array;\n  var normals = geometry.vb || attributes.normal && attributes.normal.array;\n  var stride = geometry.vb ? geometry.vbstride : 3;\n  // Get the offset to positions in the buffer. Be careful, 2D buffers\n  // don't use the 'position' attribute for positions. Reject those.\n  var poffset;\n  if (geometry.vblayout) {\n    if (!geometry.vblayout.position)\n    return; // No positions, what to do??\n    poffset = geometry.vblayout.position.offset;\n  } else if (!attributes.position)\n  return; // No positions, what to do??\n  else\n    poffset = attributes.position.itemOffset || 0;\n\n  var noffset = 0;\n  var nattr = geometry.vblayout ? geometry.vblayout.normal : attributes.normal || null;\n  if (nattr) {\n    noffset = nattr.offset || nattr.itemOffset || 0;\n  } else {\n    normals = null;\n  }\n\n  //TODO: UV channel\n\n  if (nattr && (nattr.itemSize !== 3 || nattr.bytesPerItem !== 4)) {\n    //console.log(\"Normals are packed, will be skipped from enumMeshTriangles. Use packNormals=false load option.\");\n    normals = null;\n  }\n\n  var vcount = geometry.vb ? geometry.vb.length / geometry.vbstride : positions.length / stride;\n\n  var pi = poffset;\n  var ni = noffset;\n  for (var i = 0; i < vcount; i++, pi += stride, ni += stride) {\n\n    _p.set(positions[pi], positions[pi + 1], positions[pi + 2]);\n\n    if (matrix)\n    _p.applyMatrix4(matrix);\n\n    if (normals) {\n      _n.set(normals[ni], normals[ni + 1], normals[ni + 2]);\n\n      if (matrix) {\n        _n.applyMatrix3(_normalsMatrix);\n      }\n    }\n\n    //TODO: UV channel\n\n    callback(_p, normals ? _n : null, null /*, _uv*/, i);\n  }\n}\n\nexport function enumMeshIndices(geometry, callback) {\n\n  var indices = geometry.ib || geometry.indices || (attributes.index ? attributes.index.array : null);\n\n  if (indices) {\n\n    var offsets = geometry.offsets;\n\n    if (!offsets || offsets.length === 0) {\n      offsets = [{ start: 0, count: indices.length, index: 0 }];\n    }\n\n    for (var oi = 0, ol = offsets.length; oi < ol; ++oi) {\n\n      var start = offsets[oi].start;\n      var count = offsets[oi].count;\n      var index = offsets[oi].index;\n\n      for (var i = start, il = start + count; i < il; i += 3) {\n\n        var a = index + indices[i];\n        var b = index + indices[i + 1];\n        var c = index + indices[i + 2];\n\n        callback(a, b, c);\n      }\n    }\n  } else {\n\n    var positions = geometry.vb || attributes.position.array;\n    var vcount = geometry.vb ? geometry.vb.length / geometry.vbstride : positions.length / 3;\n\n    for (var _i = 0; _i < vcount; _i++) {\n\n      var _a = 3 * _i;\n      var _b = 3 * _i + 1;\n      var _c = 3 * _i + 2;\n\n      callback(_a, _b, _c);\n    }\n  }\n}\n\n\nvar vA, vB, vC, nA, nB, nC;\n\nexport function enumMeshTriangles(geometry, callback) {\n\n  var attributes = geometry.attributes;\n\n  var a, b, c;\n\n  if (!vA) {\n    vA = new LmvVector3();\n    vB = new LmvVector3();\n    vC = new LmvVector3();\n\n    nA = new LmvVector3();\n    nB = new LmvVector3();\n    nC = new LmvVector3();\n  }\n\n  var positions = geometry.vb || attributes.position.array;\n  var normals = geometry.vb || attributes.normal && attributes.normal.array;\n  var stride = geometry.vb ? geometry.vbstride : 3;\n  // Get the offset to positions in the buffer. Be careful, 2D buffers\n  // don't use the 'position' attribute for positions. Reject those.\n  var poffset;\n  if (geometry.vblayout) {\n    if (!geometry.vblayout.position)\n    return; // No positions, what to do??\n    poffset = geometry.vblayout.position.offset;\n  } else if (!attributes.position)\n  return; // No positions, what to do??\n  else\n    poffset = attributes.position.itemOffset || 0;\n\n  var noffset = 0;\n  var nattr = geometry.vblayout ? geometry.vblayout.normal : attributes.normal || null;\n  if (nattr) {\n    noffset = nattr.offset || nattr.itemOffset || 0;\n  } else {\n    normals = null;\n  }\n\n  if (nattr && (nattr.itemSize !== 3 || nattr.bytesPerItem !== 4)) {\n    //console.log(\"Normals are packed, will be skipped from enumMeshTriangles. Use packNormals=false load option.\");\n    normals = null;\n  }\n\n  var indices = geometry.ib || geometry.indices || (attributes.index ? attributes.index.array : null);\n\n  if (indices) {\n\n    var offsets = geometry.offsets;\n\n    if (!offsets || offsets.length === 0) {\n      offsets = [{ start: 0, count: indices.length, index: 0 }];\n    }\n\n    for (var oi = 0, ol = offsets.length; oi < ol; ++oi) {\n\n      var start = offsets[oi].start;\n      var count = offsets[oi].count;\n      var index = offsets[oi].index;\n\n      for (var i = start, il = start + count; i < il; i += 3) {\n\n        a = index + indices[i];\n        b = index + indices[i + 1];\n        c = index + indices[i + 2];\n\n        var pa = a * stride + poffset;\n        var pb = b * stride + poffset;\n        var pc = c * stride + poffset;\n\n        vA.x = positions[pa];vA.y = positions[pa + 1];vA.z = positions[pa + 2];\n        vB.x = positions[pb];vB.y = positions[pb + 1];vB.z = positions[pb + 2];\n        vC.x = positions[pc];vC.y = positions[pc + 1];vC.z = positions[pc + 2];\n\n        if (normals) {\n          var na = a * stride + noffset;\n          var nb = b * stride + noffset;\n          var nc = c * stride + noffset;\n\n          nA.x = normals[na];nA.y = normals[na + 1];nA.z = normals[na + 2];\n          nB.x = normals[nb];nB.y = normals[nb + 1];nB.z = normals[nb + 2];\n          nC.x = normals[nc];nC.y = normals[nc + 1];nC.z = normals[nc + 2];\n\n          callback(vA, vB, vC, a, b, c, nA, nB, nC, i / 3);\n        } else {\n          callback(vA, vB, vC, a, b, c, null, null, null, i / 3);\n        }\n\n\n      }\n\n    }\n\n  } else {\n\n    var vcount = geometry.vb ? geometry.vb.length / geometry.vbstride : positions.length / 3;\n\n    for (var i = 0; i < vcount; i += 3) {\n\n      a = i;\n      b = i + 1;\n      c = i + 2;\n\n      var pa = a * stride + poffset;\n      var pb = b * stride + poffset;\n      var pc = c * stride + poffset;\n\n      vA.x = positions[pa];vA.y = positions[pa + 1];vA.z = positions[pa + 2];\n      vB.x = positions[pb];vB.y = positions[pb + 1];vB.z = positions[pb + 2];\n      vC.x = positions[pc];vC.y = positions[pc + 1];vC.z = positions[pc + 2];\n\n      if (normals) {\n        var na = a * stride + noffset;\n        var nb = b * stride + noffset;\n        var nc = c * stride + noffset;\n\n        nA.x = normals[na];nA.y = normals[na + 1];nA.z = normals[na + 2];\n        nB.x = normals[nb];nB.y = normals[nb + 1];nB.z = normals[nb + 2];\n        nC.x = normals[nc];nC.y = normals[nc + 1];nC.z = normals[nc + 2];\n\n        callback(vA, vB, vC, a, b, c, nA, nB, nC, i / 3);\n      } else {\n        callback(vA, vB, vC, a, b, c, null, null, null, i / 3);\n      }\n    }\n\n  }\n}\n\n\nvar vP, vQ;\n\nexport function enumMeshLines(geometry, callback) {\n\n  var attributes = geometry.attributes;\n\n  var a, b;\n\n  if (!vP) {\n    vP = new LmvVector3();\n    vQ = new LmvVector3();\n  }\n\n  var istep = 2;\n  if (geometry.lineWidth) {\n    istep = 6;\n  }\n\n\n  var indices = geometry.ib || geometry.indices || (attributes.index ? attributes.index.array : null);\n\n  if (indices) {\n\n    var positions = geometry.vb ? geometry.vb : attributes.position.array;\n    var stride = geometry.vb ? geometry.vbstride : 3;\n    var offsets = geometry.offsets;\n\n    if (!offsets || offsets.length === 0) {\n\n      offsets = [{ start: 0, count: indices.length, index: 0 }];\n\n    }\n\n    for (var oi = 0, ol = offsets.length; oi < ol; ++oi) {\n\n      var start = offsets[oi].start;\n      var count = offsets[oi].count;\n      var index = offsets[oi].index;\n\n      for (var i = start, il = start + count, lineIdx = start / istep; i < il; i += istep, lineIdx++) {\n\n        a = index + indices[i];\n        b = index + indices[i + 1];\n\n        vP.x = positions[a * stride];vP.y = positions[a * stride + 1];vP.z = positions[a * stride + 2];\n        vQ.x = positions[b * stride];vQ.y = positions[b * stride + 1];vQ.z = positions[b * stride + 2];\n\n        callback(vP, vQ, a, b, lineIdx);\n      }\n\n    }\n\n  } else {\n\n    var positions = geometry.vb ? geometry.vb : attributes.position.array;\n    var stride = geometry.vb ? geometry.vbstride : 3;\n\n    for (var i = 0, il = positions.length / stride, lineIdx = 0; i < il; i += istep, lineIdx++) {\n\n      a = i;\n      b = i + 1;\n\n      vP.x = positions[a * stride];vP.y = positions[a * stride + 1];vP.z = positions[a * stride + 2];\n      vQ.x = positions[b * stride];vQ.y = positions[b * stride + 1];vQ.z = positions[b * stride + 2];\n\n      callback(vP, vQ, a, b, lineIdx);\n    }\n\n  }\n}\n\n\nexport function enumMeshEdges(geometry, callback) {\n  var attributes = geometry.attributes;\n\n  var a, b;\n\n  if (!vP) {\n    vP = new LmvVector3();\n    vQ = new LmvVector3();\n  }\n\n  var istep = 2;\n\n  var indices = geometry.iblines;\n\n  if (!indices) {\n    return;\n  }\n\n  var positions = geometry.vb ? geometry.vb : attributes.position.array;\n  var stride = geometry.vb ? geometry.vbstride : 3;\n  var offsets = geometry.offsets;\n\n  if (!offsets || offsets.length === 0) {\n\n    offsets = [{ start: 0, count: indices.length, index: 0 }];\n\n  }\n\n  for (var oi = 0, ol = offsets.length; oi < ol; ++oi) {\n\n    var start = offsets[oi].start;\n    var count = offsets[oi].count;\n    var index = offsets[oi].index;\n\n    for (var i = start, il = start + count; i < il; i += istep) {\n\n      a = index + indices[i];\n      b = index + indices[i + 1];\n\n      vP.x = positions[a * stride];vP.y = positions[a * stride + 1];vP.z = positions[a * stride + 2];\n      vQ.x = positions[b * stride];vQ.y = positions[b * stride + 1];vQ.z = positions[b * stride + 2];\n\n      callback(vP, vQ, a, b);\n    }\n\n  }\n}\n\nexport var VertexEnumerator = {\n  getVertexCount: getVertexCount,\n  enumMeshVertices: enumMeshVertices,\n  enumMeshIndices: enumMeshIndices,\n  enumMeshTriangles: enumMeshTriangles,\n  enumMeshLines: enumMeshLines,\n  enumMeshEdges: enumMeshEdges };","import * as THREE from \"three\";\nimport { getVertexCount } from \"../VertexEnumerator\";\nimport { createBufferGeometry } from \"../BufferGeometry\";\nimport { runMergeSingleThreaded, ParallelGeomMerge } from \"./ParallelGeomMerge\";\nimport { logger } from \"../../../logger/Logger\";\nimport { MATERIAL_VARIANT } from \"../../render/MaterialManager\";\nimport { MeshFlags } from \"../MeshFlags\";\nimport { RenderFlags } from \"../RenderFlags\";\n\n// Maximum vertex count that we allow for a consolidated mesh. For simplicity, we keep it within 16 bit scope, so that\n// we can always use Uint16 indices. Allowing too large containers may backfire in several ways, e.g.,\n// it would reduce granularity for progressive rendering and frustum culling too much.\nvar MaxVertexCountPerMesh = 0xFFFF;\n\nvar PRIMITIVE_TYPE = {\n  UNKNOWN: 0,\n  TRIANGLES: 1,\n  LINES: 2,\n  WIDE_LINES: 3,\n  POINTS: 4 };\n\n\nfunction getPrimitiveType(geom) {\n  if (geom.isLines) return PRIMITIVE_TYPE.LINES;\n  if (geom.isPoints) return PRIMITIVE_TYPE.POINTS;\n  if (geom.isWideLines) return PRIMITIVE_TYPE.WIDE_LINES;\n  return PRIMITIVE_TYPE.TRIANGLES;\n}\n\nfunction setPrimitiveType(geom, type) {\n\n  // clear any previous flags\n  if (geom.isLines === true) geom.isLines = undefined;\n  if (geom.isWideLines === true) geom.isWideLines = undefined;\n  if (geom.isPoints === true) geom.isPoints = undefined;\n\n  switch (type) {\n    case PRIMITIVE_TYPE.LINES:geom.isLines = true;break;\n    case PRIMITIVE_TYPE.WIDE_LINES:geom.isWideLines = true;break;\n    case PRIMITIVE_TYPE.POINTS:geom.isPoints = true;break;}\n\n}\n\nvar MESH_HIGHLIGHTED = MeshFlags.MESH_HIGHLIGHTED;\nvar flagMask = MeshFlags.MESH_VISIBLE | MeshFlags.MESH_HIDE | MESH_HIGHLIGHTED;\nvar flagVisible = MeshFlags.MESH_VISIBLE;\nvar flagHiddenMask = MeshFlags.MESH_VISIBLE | MeshFlags.MESH_HIDE;\nvar flagHiddenVisible = 0;\nvar flagHighlightMask = MeshFlags.MESH_HIGHLIGHTED | MeshFlags.MESH_HIDE;\nvar flagHighlightVisible = MeshFlags.MESH_HIGHLIGHTED;\nvar RENDER_HIDDEN = RenderFlags.RENDER_HIDDEN;\nvar RENDER_HIGHLIGHTED = RenderFlags.RENDER_HIGHLIGHTED;\n\n// Should the object with flags get drawn in this render pass.\nexport function isVisible(flags, drawMode) {\n  switch (drawMode) {\n    case RENDER_HIDDEN:\n      return (flags & flagHiddenMask) === flagHiddenVisible; //Ghosted not visible and not hidden\n    case RENDER_HIGHLIGHTED:\n      return (flags & flagHighlightMask) === flagHighlightVisible; //highlighted (bit 1 on)\n  }\n  return (flags & flagMask) == flagVisible; //visible but not highlighted, and not a hidden line (bit 0 on, bit 1 off, bit 2 off)\n}\n\nvar _tmpMatrix = new THREE.Matrix4();\n\n/**\n                                        *  Helper class to collect shapes with identical materials and merge them into a single large shape.\n                                        *\n                                        *  @constructor\n                                        *    @param {THREE.Material} material - Material must be the same for all added geometries.\n                                        */\nfunction MergeBucket(material) {\n  this.geoms = [];\n  this.matrices = [];\n  this.vertexCount = 0;\n  this.material = material;\n  this.fragIds = [];\n  this.worldBox = new THREE.Box3();\n}\n\nMergeBucket.prototype = {\n  constructor: MergeBucket,\n\n  /**\n                             * @param {THREE.BufferGeometry} geom\n                             * @param {THREE.Box3}           worldBox\n                             * @param {Number}               fragId\n                             * @returns {Number}             costs - memory cost increase caused by the new geometry\n                             */\n  addGeom: function addGeom(geom, worldBox, fragId) {\n\n    this.geoms.push(geom);\n    this.fragIds.push(fragId);\n\n    this.worldBox.union(worldBox);\n    this.vertexCount += getVertexCount(geom);\n\n    // Track memory costs. As long as the bucket has only a single shape,\n    // we have no costs at all.\n    var numGeoms = this.geoms.length;\n    if (numGeoms == 1) {\n      return 0;\n    }\n\n    // Fragment geometries are usually BufferGeometry, which provide a byteSize for the\n    // interleaved buffer. Anything else is currently unexpected and needs code change.\n    if (geom.byteSize === undefined) {\n      logger.warn(\"Error in consolidation: Geometry must contain byteSize.\");\n    }\n\n    // For any bucket with >=2 geoms, all geometries must be considered for the costs.\n    return geom.byteSize + (numGeoms == 2 ? this.geoms[0].byteSize : 0);\n  } };\n\n\n/**\n        *  Set vertex attributes and vbstride of dstGeom to the same vertex format as srcGeom.\n        *  Note that this can only be used for interleaved vertex buffers.\n        *   @param {LmvBufferGeometry} srcGeom\n        *   @param {LmvBufferGeometry} dstGeom\n        */\nexport function copyVertexFormat(srcGeom, dstGeom) {\n\n  if (!srcGeom.vb || !srcGeom.vbstride) {\n    logger.warn(\"copyVertexFormat() supports only interleaved buffers\");\n  }\n\n  // VertexAttribute objects of WGS BufferGeometry do not contain actual vertex data.\n  // Therfore, identical BufferAttribute objects are shared among different\n  // BufferGeometries. (see findBufferAttribute in BufferGeometry.js)\n  for (var attrib in srcGeom.attributes) {\n    dstGeom.attributes[attrib] = srcGeom.attributes[attrib];\n  }\n\n  // copy attribute keys\n  dstGeom.attributesKeys = srcGeom.attributesKeys.slice(0);\n  dstGeom.vbstride = srcGeom.vbstride;\n}\n\n/**\n   *  Set primitive type and related params (lineWidth/pointSize) of dstGeom to the same values as srcGeom.\n   *   @param {BufferGeometry} srcGeom\n   *   @param {BufferGeometry} dstGeom\n   */\nexport function copyPrimitiveProps(srcGeom, dstGeom) {\n\n  var primType = getPrimitiveType(srcGeom);\n  setPrimitiveType(dstGeom, primType);\n\n  // pointSize/lineWidth\n  dstGeom.lineWidth = srcGeom.lineWidth;\n  dstGeom.pointSize = srcGeom.pointSize;\n}\n\n/**\n   * Creates target BufferGeometry used to merge several src BufferGeometries into one. (see mergeGeometries)\n   *\n   * Returns a new BufferGeometry for which...\n   *  - vb/ib are large enough to fit in all src geometry vertices/indices (allocated, but not filled yet)\n   *  - the vertex-format of the interleaved vb is the same as for the input geometries\n   *  - primitive type is the same as for (including pointSize/lineWidth)\n   *  - it has an additional attribute for per-vertex ids\n   *\n   *  @param   {BufferGeometry[]} geoms - source geometry buffers.\n   *  @returns {BufferGeometry}\n   */\nfunction createMergeGeom(geoms) {\n\n  // floats per vertex\n  var stride = geoms[0].vbstride; // same for src and dst, because we add per-vertex ids as separate attribute\n\n  // compute summed vertex and index count (and summed box if needed)\n  var indexCount = 0;\n  var vertexCount = 0;\n  var indexLinesCount = 0;\n  for (var i = 0; i < geoms.length; i++) {\n    var geom = geoms[i];\n    indexCount += geoms[i].ib.length;\n    vertexCount += getVertexCount(geom);\n    if (geoms[i].iblines)\n    indexLinesCount += geoms[i].iblines.length;\n  }\n\n  var mergedGeom = createBufferGeometry();\n\n  // allocate new geometry with vertex and index buffer\n  mergedGeom.vb = new Float32Array(vertexCount * stride);\n  mergedGeom.ib = new Uint16Array(indexCount);\n  if (indexLinesCount)\n  mergedGeom.iblines = new Uint16Array(indexLinesCount);\n\n  // make sure that byteSize is set just like for input geometry. This is required for later memory tracking.\n  mergedGeom.byteSize = mergedGeom.vb.byteLength + mergedGeom.ib.byteLength;\n  if (mergedGeom.iblines)\n  mergedGeom.byteSize += mergedGeom.iblines.byteLength;\n\n  // copy primitive type + params (pointSize/lineWidth)\n  copyPrimitiveProps(geoms[0], mergedGeom);\n\n  // copy common properties from geom[0]\n  copyVertexFormat(geoms[0], mergedGeom);\n\n  // In the shader, an id is a vec3 with components in [0,1].\n  // In memory, each component has 8 Bits of the dbId.\n  var IDItemSize = 3; // IDs are vec3 in the shader\n\n  // create/add additional per-vertex id attribute\n  //\n  // Note: The actual array buffer is not created yet, but assigned later.\n  //       (see mergeGeometries)\n  var idAttrib = new THREE.BufferAttribute(null, IDItemSize);\n  idAttrib.normalize = true; // shader needs normalized components\n  idAttrib.bytesPerItem = 1;\n  mergedGeom.addAttribute('id', idAttrib);\n\n  // set primitive type\n  var firstGeom = geoms[0];\n  var primType = getPrimitiveType(firstGeom);\n  setPrimitiveType(mergedGeom, primType);\n\n  // copy size/width for points/wide-lines\n  if (firstGeom.isPoints) mergedGeom = firstGeom.pointSize;\n  if (firstGeom.isWideLines) mergedGeom = firstGeom.lineWidth;\n\n  return mergedGeom;\n}\n\n/**\n   * Copies the vertex/index buffers of geoms into mergedGeom. Indices are modified by an offset\n   * so that they point to the correct position in mergedGeom's vertex buffer.\n   *  @param {BufferGeometry[]} geoms\n   *  @param {BufferGeometry}   mergedGeom\n   */\nfunction copyVertexAndIndexBuffers(geoms, mergedGeom) {\n\n  // write-offset in mergedGeom.vb (in floats)\n  var dstOffset = 0;\n\n  // create combined vertex and index buffer - including transforms\n  var vertexOffset = 0;\n  var indexOffset = 0;\n  var indexOffsetLines = 0;\n  for (var i = 0; i < geoms.length; i++) {\n    var geom = geoms[i];\n    var vertexCount = getVertexCount(geom);\n\n    // copy indices (+ offset)\n    for (var j = 0; j < geom.ib.length; j++) {\n      mergedGeom.ib[indexOffset + j] = geom.ib[j] + vertexOffset;\n    }\n\n    // copy line indices\n    if (geom.iblines) {\n      for (var j = 0; j < geom.iblines.length; j++) {\n        mergedGeom.iblines[indexOffsetLines + j] = geom.iblines[j] + vertexOffset;\n      }\n\n      indexOffsetLines += geom.iblines.length;\n    }\n\n    // copy vertex buffer\n    mergedGeom.vb.set(geom.vb, dstOffset);\n    dstOffset += geom.vb.length;\n\n    // set offsets for next geom\n    vertexOffset += vertexCount;\n    indexOffset += geom.ib.length;\n\n  }\n}\n\n/**\n   * Create a single BufferGeometry that contains all geometries.\n   * Requirements:\n   *  - All geoms must have identical vertex format.\n   *  - Geometries must have interleaved vertex buffers\n   *  - Geometries must not have instance buffers. But the same geometry may be added with different matrices.\n   *\n   *  @param {THREE.BufferGeometry[]} geoms\n   *  @param {Float32Array}           matrices - array of matrices per geometry. Each matrix is a range of 16 floats.\n   *  @param {Int32Array}             dbIds    - db per input geometry. Used to create per-vertex ids.\n   *  @param {THREE.Box3}             worldBox - summed worldBox of all transformed geometries\n   *  @param {ParallelGeomMerge}      [parallelMerge] - Coordinates worker threads for parallel merge.\n   *                                                    Not needed for single-threaded use.\n   *  @returns {LmvBufferGeometry}\n   */\nexport function mergeGeometries(geoms, matrices, dbIds, worldBox, parallelMerge) {\n\n  var mergedGeom = createMergeGeom(geoms);\n\n  mergedGeom.boundingBox = worldBox.clone();\n\n  // copy src vertex/index buffers into mergedGeom\n  copyVertexAndIndexBuffers(geoms, mergedGeom);\n\n  // The last steps are either done directly or delegated to a worker thread\n  if (parallelMerge) {\n    parallelMerge.addMergeTask(geoms, mergedGeom, matrices, dbIds);\n  } else {\n    runMergeSingleThreaded(geoms, mergedGeom, matrices, dbIds);\n  }\n\n  return mergedGeom;\n}\n\n/**\n   *  Returns true if geom1 and geom2 have compatible vertex format to allow merging.\n   *  For this, vbstride and all vertex attributes must be equal.\n   *\n   * Requirement: This function is only called for geoms that...\n   *  1. use interleaved vertex buffers\n   *  2. do not use instancing\n   *\n   * @param {THREE.BufferGeometry} geom1\n   * @param {THREE.BufferGeometry} geom2\n   * @returns {boolean}\n   */\nfunction canBeMerged(geom1, geom2) {\n\n  if (geom1.vbstride != geom2.vbstride) {\n    return false;\n  }\n\n  var primType1 = getPrimitiveType(geom1);\n  var primType2 = getPrimitiveType(geom2);\n  if (primType1 !== primType2) {\n    return false;\n  }\n\n  // compare pointSize/lineWidth for points/wideLines\n  if (geom1.isPoints && geom1.pointSize !== geom2.pointSize) return false;\n  if (geom1.isWideLines && geom1.lineWidth !== geom2.lineWidth) return false;\n\n  if (geom1.attributesKeys.length != geom2.attributesKeys.length) {\n    return false;\n  }\n\n  // compare each attribute\n  for (var i = 0, iEnd = geom1.attributesKeys.length; i < iEnd; i++) {\n    var key = geom1.attributesKeys[i];\n\n    // get BufferAttributes of both geoms\n    var attrib1 = geom1.attributes[key];\n    var attrib2 = geom2.attributes[key];\n\n    // if geom2 does not have this, we are done\n    if (!attrib2) {\n      return false;\n    }\n\n    // Since attributes are cached in WGS BufferGeometry, we will mostly detect equality here already.\n    if (attrib1 === attrib2) {\n      continue;\n    }\n\n    // Compare values. Note that it's not enough to compare the THREE.BufferAttribute properties itemSize and normalize, but\n    // also some WGS-specific values (see BufferGeometry.js).\n    if (\n    attrib1.itemOffset !== attrib2.itemOffset ||\n    attrib1.normalize !== attrib2.normalize ||\n    attrib1.itemSize !== attrib2.itemSize ||\n    attrib1.bytesPerItem !== attrib2.bytesPerItem ||\n    attrib1.isPattern !== attrib2.isPattern)\n    {\n      return false;\n    }\n  }\n  return true;\n}\n\n\n/** @class Helper class to collect results of ConsolidationBuilder. */\nexport function Consolidation(fragCount) {\n\n  // all consolidated meshes (+ some original geometries if they could not be merged)\n  this.meshes = []; // {THREE.Mesh[]}\n\n  // for each initially added source geometry, this array provides the position\n  // in this.meshes where we can find the corresponding output mesh. The output mesh\n  // is either\n  //  a) a consolidated mesh that includes the input geometry or\n  //  b) a mesh that shares the original material and geometry (if it couldn't be merged)\n  this.fragId2MeshIndex = new Int32Array(fragCount);\n\n  // init with -1\n  for (var i = 0; i < this.fragId2MeshIndex.length; i++) {\n    this.fragId2MeshIndex[i] = -1;\n  }\n\n  // track summed size\n  this.byteSize = 0;\n\n  // keep intermediate result to make reruns faster\n  this.consolidationMap = null;\n}\n\nConsolidation.prototype = {\n\n  constructor: Consolidation,\n\n  /** Add a consolidation mesh that combines several source geometries.\n                               *   @param {THREE.BufferGeometry} geom\n                               *   @param {THREE.Material}       material\n                               *   @param {number[]}             fragIds      - array of fragment ids associated with this container\n                               *   @param {number}               [firstFrag]  - Optional: Use (firstFrag, fragCount) to specify\n                               *   @param {number}               [fragCount]    a range within the fragIds array.\n                               */\n  addContainerMesh: function addContainerMesh(geom, material, fragIds, firstFrag, fragCount) {\n\n    // add new mesh\n    var newMesh = new THREE.Mesh(geom, material);\n    this.meshes.push(newMesh);\n\n    // track byte size\n    this.byteSize += geom.byteSize;\n\n    // default range: full array\n    var rangeStart = firstFrag || 0;\n    var rangeLength = fragCount || fragIds.length;\n    var rangeEnd = rangeStart + rangeLength;\n\n    // Disable THREE frustum culling for all shapes.\n    //\n    // Reason:\n    // Default frustum culling of THREE.js does not work and would let the mesh disappear.\n    // This happens because newMesh.computeBoundingSphere() fails for interleaved vertex buffers.\n    // (see Frustum.intersectsObject used in FireFlyWebGLRenderer.projectObject)\n    //\n    // Instead, we apply culling before passing a mesh to the Renderer. (see ConsolidationIterator.js)\n    newMesh.frustumCulled = false;\n\n    // For each source fragment, remember in which container we find it\n    var meshIndex = this.meshes.length - 1;\n    for (var i = rangeStart; i < rangeEnd; i++) {\n      var fragId = fragIds[i];\n      this.fragId2MeshIndex[fragId] = meshIndex;\n    }\n  },\n\n  /**\n      *  Add a single mesh that has unique matrix, fragId, and dbId. This is used to add meshes\n      *  that share original geometry that could not be merged with anything else.\n      *\n      *   @param {THREE.BufferGeometry} geom\n      *   @param {THREE.Material}      material\n      *   @param {number}               fragId\n      *   @param {THREE.Matrix4}        matrix\n      *   @param {number}               dbId\n      */\n  addSingleMesh: function addSingleMesh(geom, material, fragId, matrix, dbId) {\n\n    // create new mesh\n    var newMesh = new THREE.Mesh(geom, material);\n    newMesh.matrix.copy(matrix);\n    newMesh.matrixAutoUpdate = false;\n    newMesh.dbId = dbId;\n    newMesh.fragId = fragId;\n\n    // add it to mesh array\n    this.meshes.push(newMesh);\n\n    // Note: We don't track byteSize for these, because these geometries are shared, i.e., do\n    //       not consume any extra memory compared to original geometry.\n\n    // Disable frustum culling (see comment in addContainerMesh)\n    newMesh.frustumCulled = false;\n\n    // make it possible to find it later\n    this.fragId2MeshIndex[fragId] = this.meshes.length - 1;\n  },\n\n  /**\n      *  Shortcut to add geometry, material etc. of a single fragment to the consolidation.\n      *  This is used for all fragments that could not be combined with others.\n      *   @param {FragmentList}  fragList\n      *   @param {number}        fragId\n      */\n  addSingleFragment: function addSingleFragment(fragList, fragId) {\n    var mesh = fragList.getVizmesh(fragId);\n\n    // Note that the model may be moved using the model transform at any time.\n    // We don't want the consolidation computation to be affected by this.\n    // Therefore, consolidation is always done with excluded dynamic model transform.\n    // The model transform is applied later by the ConsolidationIterator.\n    // So, it's important to use the originalWorldMatrix here, which is not affected by model transform changes.\n    fragList.getOriginalWorldMatrix(fragId, _tmpMatrix);\n\n    this.addSingleMesh(mesh.geometry, mesh.material, fragId, _tmpMatrix, mesh.dbId);\n  },\n\n  /**\n      * Apply the current vizflags and theming colors to the mesh and return it\n      * @param {Number} meshIndex Index of consolidate/instanced mesh\n      * @param {FragmentList} fragList Fragment list for the model\n      * @param {Number} drawMode Render pass id from RenderFlags.\n      * @param {Bool} specialHandling True if the mesh needs special handling\n      * @return {THREE.Mesh} Consolidate/instanced mesh\n      */\n  applyAttributes: function applyAttributes(meshIndex, fragList, drawMode, specialHandling) {\n    var curMesh = this.meshes[meshIndex]; // Current mesh\n    var curGeom = curMesh.geometry; // Current gometry\n    var vizflags = fragList.vizflags;\n    var consolidationMap = this.consolidationMap;\n    var fragIds = consolidationMap.fragOrder;\n    var instanced = curGeom.numInstances; // Instanced or conslidated\n    var rangeStart; // Start of fragment range\n    var rangeEnd; // End of fragment range\n    var fragId;\n\n    var db2ThemingColor = fragList.db2ThemingColor;\n    var themingActive = db2ThemingColor.length > 0 || undefined;\n\n    // Get the range of fragments for the mesh.\n    if (instanced) {\n      // Instanced buffer. The start of the fragment in fragIds\n      // is in the rangeStart property of the mesh. The end is\n      // numInstances fragments later.\n      rangeStart = curMesh.rangeStart;\n      rangeEnd = rangeStart + curMesh.geometry.numInstances;\n    } else if (curGeom.attributes.id) {\n      // Consolidated buffer - The start ranges are in the\n      // consolidated map\n      rangeStart = consolidationMap.ranges[meshIndex];\n      rangeEnd = meshIndex + 1 >= consolidationMap.ranges.length ?\n      consolidationMap.numConsolidated : consolidationMap.ranges[meshIndex + 1];\n    } else {\n      // No range, just one fragment\n      fragId = curMesh.fragId;\n    }\n\n    // If the mesh doesn't need special handling, then return it.\n    if (!specialHandling || fragId !== undefined) {\n      // Clear offsets, but not for single meshes\n      if (curGeom.offsets && fragId === undefined) {\n        curGeom.offsets = curGeom.drawcalls = undefined;\n      }\n      // set the visibility from the drawMode\n      curMesh.visible = isVisible(vizflags[fragId === undefined ? fragIds[rangeStart] : fragId], drawMode);\n      curMesh.themingColor = themingActive && db2ThemingColor[fragList.fragments.fragId2dbId[fragId]];\n      return curMesh;\n    }\n    var start = 0; // Start of current draw call indices\n    var end = 0; // End of currend draw call endices - so far\n    var startLines = 0; // Start of current draw call indices\n    var endLines = 0; // End of currend draw call endices - so far\n    var curVisible; // Current draw call visibility\n    var curColor; // Current draw call color\n    var curDrawCall = 0; // Current draw call index\n\n    // Add a draw call to the consolidated mesh\n    function addDrawCall() {\n      // If the draw call isn't visible, just skip it\n      if (curVisible) {\n        curGeom.drawcalls = curGeom.offsets = curGeom.offsets || [];\n        // Avoid calling addDrawCall because this is inside the draw loop\n        // and we would like to reduce the number of object created and\n        // released, when possible.\n        var offset = curGeom.offsets[curDrawCall] || { index: 0 };\n        curGeom.offsets[curDrawCall++] = offset;\n        // Only add the draw call if there is something to draw.\n        if (instanced) {\n          offset.start = 0;\n          offset.count = curGeom.ib.length;\n          if (curGeom.iblines) {\n            offset.edgeStart = 0;\n            offset.edgeCount = curGeom.iblines.length;\n          }\n          offset.instanceStart = start;\n          offset.numInstances = end - start;\n        } else {\n          offset.start = start;\n          offset.count = end - start;\n          if (curGeom.iblines) {\n            offset.edgeStart = startLines;\n            offset.edgeCount = endLines - startLines;\n          }\n        }\n        // Set the theming color in the draw call\n        offset.themingColor = curColor;\n      }\n    }\n\n    function addLastDrawCall() {\n      if (start === 0) {\n        // Only one draw call, Set theming and visibility for entire mesh\n        curMesh.themingColor = curColor;\n        curMesh.visible = curVisible;\n      } else {\n        curMesh.visible = true;\n        addDrawCall();\n        // Clear existing draw calls\n      }\n      curGeom.offsets && (curGeom.offsets.length = curDrawCall);\n    }\n\n    // Loop through the fragments in the fragment list\n    for (var i = rangeStart; i < rangeEnd; ++i) {\n      var fragId = fragIds[i];\n\n      // Get the visibility and theming color for the fragment\n      var visible = isVisible(vizflags[fragId], drawMode);\n      var color = themingActive && fragList.db2ThemingColor[fragList.fragments.fragId2dbId[fragId]];\n\n      // Skip the first time through the loop\n      if (visible !== curVisible || visible && color !== curColor) {\n        // Visibility or color change, add a draw call\n        if (end > start) {\n          addDrawCall();\n        }\n        // Reset the draw call variables\n        start = end;\n        startLines = endLines;\n        curVisible = visible;\n        curColor = color;\n      }\n\n      // Add current fragment into the next draw call\n      if (instanced) {\n        end += 1;\n      } else {\n        var geom = fragList.getGeometry(fragId);\n        end += geom.ib.length;\n        if (geom.iblines) {\n          endLines += geom.iblines.length;\n        }\n      }\n    }\n    // Add last draw call for the last mesh\n    addLastDrawCall();\n\n    return curMesh;\n  } };\n\n\n\n/**\n        *  @class ConsolidationBuilder is a utility to merge several (usually small) objects into larger ones to\n        *  improve rendering performance.\n        */\nexport function ConsolidationBuilder() {\n  this.buckets = {}; // {MergeBuchet[]}\n  this.bucketCount = 0;\n  this.costs = 0; // Consolidation costs in bytes (=costs of merged Geometries for each bucket with >=2 geoms)\n}\n\n\nConsolidationBuilder.prototype = {\n\n  /**\n                                    *  Add a new Geometry for consolidation. Note that some geometries cannot be merged (e.g., if their material\n                                    *  is different from all others.). In this case, the output mesh just shares input geometry and material.\n                                    *\n                                    *   @param {THREE.BufferGeometry} geom\n                                    *   @param {THREE.Material}       material\n                                    *   @param {THREE.Box3}           worldBox - worldBox (including matrix transform!)\n                                    *   @param {Number}               fragId   - used to find out later in which output mesh you find this fragment\n                                    */\n  addGeom: function addGeom(geom, material, worldBox, fragId) {\n\n    // find bucket of meshes that can be merged with the new one\n    var bucket = null;\n    var buckets = this.buckets[material.id];\n    if (buckets) {\n      for (var i = 0; i < buckets.length; i++) {\n\n        // get next bucket\n        var nextBucket = buckets[i];\n\n        // compatible primitive type and vertex format?\n        var bucketGeom = nextBucket.geoms[0];\n        if (!canBeMerged(bucketGeom, geom)) {\n          continue;\n        }\n\n        // this bucket would allow merging, but only if the vertex count doesn't grow too much\n        var vertexCount = getVertexCount(geom);\n        if (vertexCount + nextBucket.vertexCount > MaxVertexCountPerMesh) {\n          continue;\n        }\n\n        // we found a bucket to merge with\n        bucket = nextBucket;\n        break;\n      }\n    }\n\n    // create a new bucket to collect this mesh\n    if (!bucket) {\n      bucket = new MergeBucket(material);\n      this.bucketCount++;\n\n      if (!this.buckets[material.id])\n      this.buckets[material.id] = [bucket];else\n\n      this.buckets[material.id].push(bucket);\n    }\n\n    // add geometry to bucket\n    this.costs += bucket.addGeom(geom, worldBox, fragId);\n  },\n\n  /**\n      * When all geometries have been added to buckets using addGeom() calls, this function converts the buckets into a\n      * more compact representation called ConsolidationMap. This map summarizes all information that we need to build\n      * the FragmentList consolidation.\n      *\n      * @param {Uint32Array}    allFragIds      - all fragIds, sorted by consolidation costs.\n      * @param {numConsolidate} numConsolidated - number of ids in allFragIds that have been added to consolidation buckets\n      *                                           all remaining ones are processed separately by instancing.\n      * @returns {ConsolidationMap}\n      */\n  createConsolidationMap: function createConsolidationMap(allFragIds, numConsolidated) {\n\n    // init result object\n    var fragCount = allFragIds.length;\n    var result = new ConsolidationMap(fragCount, this.bucketCount);\n\n    // fill fragOrder and ranges. Each range contains all fragIds of a single bucket\n    var nextIndex = 0;\n    var bucketIdx = 0;\n    for (var matId in this.buckets) {\n\n      var buckets = this.buckets[matId];\n\n      for (var b = 0; b < buckets.length; b++) {\n\n        var bucket = buckets[b];\n\n        // store start index of the range in fragOrder that corresponds to this bucket\n        result.ranges[bucketIdx] = nextIndex;\n\n        // store bucket box (no need to copy)\n        result.boxes[bucketIdx] = bucket.worldBox;\n\n        // append all fragIds in this bucket\n        result.fragOrder.set(bucket.fragIds, nextIndex);\n\n        // move nextIndex to the next range start\n        nextIndex += bucket.fragIds.length;\n        bucketIdx++;\n      }\n\n    }\n\n    // remember which fragIds remain and must be processed by instancing\n    result.numConsolidated = numConsolidated;\n    for (var i = numConsolidated; i < allFragIds.length; i++) {\n      result.fragOrder[i] = allFragIds[i];\n    }\n    return result;\n  } };\n\n\n/**\n        * A ConsolidationMap is an intermediate result of a FragmentList consolidation. It describes which\n        * fragments are to be merged into consolidated meshes and which ones have to be processed by instancing.\n        */\nfunction ConsolidationMap(fragCount, bucketCount) {\n\n  // Ordered array of fragIds. Each range of the array defines a merge bucket.\n  this.fragOrder = new Uint32Array(fragCount);\n\n  // Offsets into fragOrder. ranges[i] is the startIndex of the range corresponding to merge bucket i.\n  this.ranges = new Uint32Array(bucketCount);\n\n  // Cached bboxes of consolidated meshes\n  this.boxes = new Array(bucketCount);\n\n  // Store how many fragIds in fragOrder have been added to merge buckets.\n  // (fragIds[0], ..., fragIds[numConsolidated-1].\n  this.numConsolidated = -1; // will be set in createConsolidationMap\n}\n\nConsolidationMap.prototype = {\n\n  /**\n                                * Create consolidated meshes.\n                                *  @param {FragmentList}   fragList\n                                *  @param {MaterialManage} matman\n                                *  @param {RenderModel}    model\n                                *  @param {boolean}        [multithreaded] - If true, a part of the geometry merge work is delegated to a\n                                *                                            worker thread, so that the blocking time is shorter.\n                                *  @returns {Consolidation}\n                                */\n  buildConsolidation: function buildConsolidation(fragList, matman, model) {\n\n    // some shortcuts\n    var fragIds = this.fragOrder;\n    var fragCount = fragList.getCount();\n    var rangeCount = this.ranges.length;\n\n    var result = new Consolidation(fragCount);\n\n    // Init worker thread if enabled\n    var parallelMerge = null;\n\n    // Check if a worker-implementation is available.\n    if (multithreadingSupported()) {\n      // Activate multithreaded consolidation\n      parallelMerge = new ParallelGeomMerge(result);\n    } else {\n      //console.warn(\"Multithreaded consolidation requires to registers worker support. Falling back to single-threaded consolidation.\");\n    }\n\n    // tmp objects\n    var geoms = [];\n    var matrix = new THREE.Matrix4();\n\n    // each range of fragIds is merged into a consolidated mesh\n    for (var c = 0; c < rangeCount; c++) {\n\n      // get range of fragIds in this.fragOrder from which we build the next consolidated mesh.\n      // Note that this.ranges only contains the range begins and the last range ends at this.numConsolidated.\n      var rangeBegin = this.ranges[c];\n      var rangeEnd = c === rangeCount - 1 ? this.numConsolidated : this.ranges[c + 1];\n      var rangeLength = rangeEnd - rangeBegin;\n\n      // just 1 shape? => just share original geometry and material\n      if (rangeLength === 1) {\n        var fragId = fragIds[rangeBegin];\n        result.addSingleFragment(fragList, fragId, result);\n        continue;\n      }\n\n      // create array of BufferGeometry pointers\n      geoms.length = rangeLength;\n\n      // create Float32Array containing the matrix per src fragment\n      var matrices = new Float32Array(16 * rangeLength);\n\n      // create Int32Array of dbIds\n      var dbIds = new Uint32Array(rangeLength);\n\n      for (var i = 0; i < rangeLength; i++) {\n        fragId = fragIds[rangeBegin + i];\n\n        // fill geoms\n        geoms[i] = fragList.getGeometry(fragId);\n\n        // store matrix as 16 floats\n        fragList.getOriginalWorldMatrix(fragId, matrix);\n        matrices.set(matrix.elements, 16 * i);\n\n        // store dbId in Int32Array\n        dbIds[i] = fragList.getDbIds(fragId);\n      }\n\n      // get box of consolidated mesh\n      var box = this.boxes[c];\n\n      // use material of first frag in the bucket\n      var firstFrag = fragIds[rangeBegin];\n      var material = fragList.getMaterial(firstFrag);\n\n      // get geom and material for consolidated mesh\n      var mergedGeom = mergeGeometries(geoms, matrices, dbIds, box, parallelMerge);\n      var newMaterial = matman.getMaterialVariant(material, MATERIAL_VARIANT.VERTEX_IDS, model);\n\n      // add result\n      result.addContainerMesh(mergedGeom, newMaterial, fragIds, rangeBegin, rangeLength);\n    }\n\n    if (parallelMerge) {\n      // start workers for geometry merging. This will invoke the worker operations and\n      // set result.inProgress to true until all worker results are returned.\n      parallelMerge.runTasks();\n    }\n\n    // store this consolidation map with the consolidation, so that we can rebuild it faster.\n    result.consolidationMap = this;\n\n    return result;\n  } };\n\n\nfunction multithreadingSupported() {\n  return !!ParallelGeomMerge.createWorker;\n}\n\n/*\n   * A too fine-grained BVH may neutralize the performance gain by consolidation. To avoid that, use these defaults\n   * for bvh settings when consolidation is wanted. Model loaders do this automatically when useConsolidation is set to true.\n   *  @param {Object} bvhOptions\n   */\nConsolidation.applyBVHDefaults = function (bvhOptions) {\n  bvhOptions[\"frags_per_leaf_node\"] = 512;\n  bvhOptions[\"max_polys_per_node\"] = 100000;\n};\n\nConsolidation.getDefaultBVHOptions = function () {\n  var bvhOptions = {};\n  Consolidation.applyBVHDefaults(bvhOptions);\n  return bvhOptions;\n};","import { mergeGeometries } from './Consolidation';\nimport { InstanceBufferBuilder } from './InstanceBufferBuilder';\nimport * as THREE from \"three\";\nimport { MeshFlags } from \"../MeshFlags\";\nimport { logger } from \"../../../logger/Logger\";\n\n\n/**\n                                                  *  ConsolidationIterator is used by by RenderModel to replace groups of fragments by consolidated meshes whenever possible.\n                                                  *\n                                                  *  Note that it is not a ModelIterator - just a helper to iterate over the consolidation in parallel to replace the\n                                                  *  results of ModelIterators.\n                                                  *\n                                                  * Why is it needed?\n                                                  * -----------------\n                                                  *\n                                                  * A consolidated fragment list can strongly accelerate rendering for some models by reducing the per-shape work of the\n                                                  * WebGLRenderer.\n                                                  *\n                                                  * However, just putting the consolidated meshes into a scene and rendering it would introduce several problems:\n                                                  *  1. Progressive rendering would not work anymore.\n                                                  *  2. We could not use the BVH for hierarchical visibility culling anymore.\n                                                  *  3. All individual stuff (setFragOff, ghosting, theming) would stop working.\n                                                  *\n                                                  * These problems are addressed by ConsolidationIterator.\n                                                  *\n                                                  * How does it work?\n                                                  * -----------------\n                                                  *\n                                                  * There is no perfect solution for the problems above. E.g., progressive rendering with a fine-grained BVH would require\n                                                  * to permanently vary the shape order - which would completely revert the performance benefit of consolidation.\n                                                  * Therefore, the goal is to achieve a balanced trade-off between a) consolidating as much as possible and b) keeping\n                                                  * the advantages of the BVH traversal that is used normally.\n                                                  *\n                                                  * For this, the BVHIterator traverses the scene as usual. The normal behavior is to return a RenderBatch with\n                                                  * individual fragments on each nextBatch call. When using consolidation, we replace each such RenderBatch\n                                                  * by a THREE scene in a way that:\n                                                  *\n                                                  *  - For each fragment f that has not been rendered yet, it contains the consolidated mesh containing f\n                                                  *  - It is ensured that each consolidated batch is only used once in a traversal.\n                                                  *\n                                                  * Note that this means that we have a bit less granularity, i.e., some fragments will be rendered that would be\n                                                  * culled otherwise, and progressive rendering will render some fragments earlier than normally. However,\n                                                  * this is a necessary trade-off as explained above.\n                                                  *\n                                                  * What about hiding/ghosting/theming?\n                                                  * ------------------------------------\n                                                  *\n                                                  * Another purpose of this class is to keep per-fragment hiding/ghosting/theming working when using a consolidated FragmentList.\n                                                  * At the moment, we use a very simple fallback for this: Whenever a fragment needs any special treatment\n                                                  * (e.g., is ghosted), we temporarily disable consolidated meshes and fall back to individual fragments.\n                                                  *\n                                                  * Limitation: An obvious drawback of this straightforward solution is that consolidation only improves the\n                                                  * rendering speed as long as no fragment needs special treatment. As soon as any ghosting/hiding/theming is used,\n                                                  * we fall back to original speed.\n                                                  *\n                                                  * Supporting consolidation and individual fragment modification at once will require some extra work.\n                                                  *\n                                                  *\n                                                  * @constructor\n                                                  *  @param {FragmentList}  fragList          - Original fragment list\n                                                  *  @param {Consolidation} fragConsolidation - Consolidated representation of a full FragmentList\n                                                  */\nexport function ConsolidationIterator(fragList, fragConsolidation) {\n\n  // FragmentList\n  var _frags = fragList;\n\n  // Consolidated fragment list\n  var _fragConsolidation = fragConsolidation;\n\n  // {Bool[]} Used to track which consolidated shapes have been rendered in the current traversal.\n  var _shapeDone = [];\n\n  // If true, we must use original fragments in the current traversal. This flag is determined at the beginning\n  // of a traversal and is set whenever a fragment needs special treatment (ghosting/hiding etc.).\n  var _consolidationDisabled = false;\n\n  // Each scene replaces a RenderBatch that represents a node in the BVH hierarchy.\n  // The RenderBatch of a BVHNode is always the same object. This allows RenderScene to track\n  // average fragment times by attaching the avgFrameTime to each object.\n  // To keep this working when replacing RenderBatches by THREE.Scenes, the THREE.Scene object of a BVHNode\n  // must also keep the same object per bvh node. Therefore, we index the cache by bvhNode index.\n  var _sceneCache = []; // {THREE.Scene[]} Reused per traversal\n\n  var _specialHandling = []; // Bool[] to mark meshes that need special handling\n\n  // some reused temp objects\n  var _tempMatrix = new THREE.Matrix4();\n  var _tempBox = new THREE.Box3();\n\n  // Apply optional model matrix. Note:\n  //  - We assume here that the consolidation was computed using the original fragment matrices without considering a model transform.\n  //  - We cannot set the modelTransform on the meshes themselves: Reason is that single-fragment meshes still have the transform of the original fragment\n  function applyModelMatrix(scene) {\n    var modelMatrix = _frags.matrix;\n    if (modelMatrix) {\n      scene.matrixWorld.copy(modelMatrix);\n      scene.matrixAutoUpdate = false; // Avoid worldMatrix from being recomputed by THREE based on pos/rotation/scale\n    } else {\n      scene.matrixWorld.identity();\n    }\n  }\n\n  // get next scene from cache\n  function acquireScene(index) {\n    // create new scee on first use\n    if (!_sceneCache[index]) {\n      _sceneCache[index] = new THREE.Scene();\n\n      // Make sure that current model matrix is applied to each scene\n      applyModelMatrix(_sceneCache[index]);\n    }\n    var scene = _sceneCache[index];\n    scene.children.length = 0;\n    return scene;\n  }\n\n  // Make sure mesh worldMatrix is updated on next frame.\n  //\n  // Why needed:\n  //   This is essential for any meshes that only have one fragment: For these, mesh.matrix stores the initial\n  //   fragment matrix. Therefore, matrixAutoUpdate is set to false, so that mesh.matrix is not recomputed/overwritten by THREE.js.\n  //\n  //   However, this also avoids the automatic recomputation of mesh.matrixWorld.\n  //\n  //   This function ensures that all mesh world-matrices are updated on first render and whenever the model transform changes.\n  function worldMatricesDirty() {\n\n    var meshes = _fragConsolidation.meshes;\n    for (var i = 0; i < meshes.length; i++) {\n      meshes[i].matrixWorldNeedsUpdate = true;\n    }\n  }\n\n  // ensure up-to-date world-matrices on first render\n  worldMatricesDirty();\n\n  this.modelMatrixChanged = function () {\n\n    // Set scene matrices\n    for (var i = 0; i < _sceneCache.length; i++) {\n      // Note that _sceneCache may contain null elements, because elements are indexed by BVH nodeIdx \n      var scene = _sceneCache[i];\n      if (scene) {\n        applyModelMatrix(scene);\n      }\n    }\n\n    worldMatricesDirty();\n  };\n\n  this.getConsolidation = function () {\n    return _fragConsolidation;\n  };\n\n  /**\n      * Called at the beginning of a scene traversal.\n      */\n  this.reset = function () {\n\n    // reset state to \"not used yet\" for all consolidated meshes\n    _shapeDone.length = null;\n    _specialHandling.length = 0;\n\n    var fragCount = _frags.getCount();\n    var moved = MeshFlags.MESH_MOVED;\n    var flagsOK = MeshFlags.MESH_VISIBLE;\n    var flagsMask = flagsOK | MeshFlags.MESH_HIDE | MeshFlags.MESH_HIGHLIGHTED;\n    var vizflags = _frags.vizflags;\n\n    var fragId2MeshIndex = _fragConsolidation.fragId2MeshIndex;\n    var meshes = _fragConsolidation.meshes;\n\n    _consolidationDisabled = false;\n    var themingActive = _frags.db2ThemingColor.length > 0;\n    for (var fragId = 0; fragId < fragCount; fragId++) {\n\n      var flags = vizflags[fragId];\n      if (flags & moved) {\n        _consolidationDisabled = true;\n        break;\n      }\n\n      // consider color theming\n      var themingColor;\n      if (themingActive) {\n        var dbId = _frags.fragments.fragId2dbId[fragId];\n        themingColor = _frags.db2ThemingColor[dbId];\n      }\n\n      var index = fragId2MeshIndex[fragId];\n      _specialHandling[index] = _specialHandling[index] || !!(themingColor || flags & flagsMask ^ flagsOK);\n    }\n  };\n\n  this.dispose = function () {\n\n    var DISPOSE_EVENT = { type: 'dispose' };\n    var REMOVED_EVENT = { type: 'removed' };\n\n    for (var i = 0; i < _fragConsolidation.meshes.length; i++) {\n      var mesh = _fragConsolidation.meshes[i];\n      var geom = mesh.geometry;\n      if (geom) {\n        //Both of these are needed -- see also how it's done in FragmentList dispose\n        mesh.dispatchEvent(REMOVED_EVENT);\n        geom.dispatchEvent(DISPOSE_EVENT);\n\n        // In case of later reuse, setting needsUpdate is essential to render it again.\n        geom.needsUpdate = true;\n      }\n    }\n\n    // Note that all consolidation materials are associated with the owning RenderModel and\n    // are automatically disposed with the other RenderModel resources.\n    // Therefore, we don't dispose them here.\n  };\n\n  /**\n      * Given a RenderBatch that would normally be rendered next, this function\n      * creates a consolidated scene to replace it in a way that:\n      *\n      *  1. Each fragment f in the batch is included (unless it has already been rendered in this traveral)\n      *  2. During traversal, each consolidated mesh is only used once.\n      *\n      *  @param   {RenderBatch}          renderBatch\n      *  @param   {FrustumInstersector}  frustum\n      *  @param   {number}               drawMode\n      *  @returns {THREE.Scene|RenderBatch} If fragments must be rendered individually, the input RenderBatch\n      *           is returned. This happens, e.g., if one or more fragments is ghosted.\n      */\n  this.consolidateNextBatch = function (renderBatch, frustum, drawMode) {\n\n    // get bvh node index associated with this RenderBatch. We need this to make sure that\n    // a RenderBatch is always replaced by the same THREE.Scene object.\n    var nodeIndex = renderBatch.nodeIndex;\n\n    // Fallback: Just use original fragments to make sure that ghosting/hiding/theming keeps working.\n    if (_consolidationDisabled || nodeIndex === undefined) {\n      return renderBatch;\n    }\n\n    // If we used multithreaded consolidation, we must use standard geometry until precomputation is finished.\n    if (_fragConsolidation.inProgress) {\n      return renderBatch;\n    }\n\n    var scene = acquireScene(nodeIndex);\n\n    // For each fragment: Find the consolidated shape that contains it and add it to the scene.\n    for (var i = renderBatch.start; i < renderBatch.lastItem; i++) {\n\n      var fragId = renderBatch.indices ? renderBatch.indices[i] : i;\n\n      // find consolidated shape containing this fragment\n      var meshIndex = _fragConsolidation.fragId2MeshIndex[fragId];\n      var mesh = null;\n\n      if (meshIndex === -1) {\n\n        // If the original geometry was missing already, just skip the fragment\n        if (!_frags.getGeometry(fragId)) {\n          continue;\n        }\n\n        // By design, a FragmentList consolidation must always have replacements for\n        // each fragment. So, something must have failed here.\n        // Note that we cannot simply add single meshes by _frags.getVisMesh(),\n        // because getVizMesh() always return the same (reused) object.\n        logger.warn(\"Warning: Missing fragment in consolidation. Consolidation disabled.\");\n        return renderBatch;\n      }\n\n      // Skip consolidated shape if it has already been used in this traversal.\n      if (_shapeDone[meshIndex]) {\n        continue;\n      }\n\n      // Apply frustum culling. Some related considerations:\n      //\n      //  1. Instead of culling per container mesh, we apply culling based on original fragments.\n      //     Advantages:\n      //      - Since merged fragments may be arbitrarily distributed, the culling granularity\n      //        of original fragments is significantly higher.\n      //      - When using progressive rendering, the per-fragment culling avoids that we\n      //        are rendering containers too early if only distant fragments of them are visible.\n      //\n      //  2. Simply using RenderBatch.applyVisibility() on the original batch caused some noticable\n      //     frame rate hickups for some test models (e.g. NWD with ~284K fragments). Also because the\n      //     BVH cannot be too fine-grained when using consolidation.\n      //\n      //     The advantage of doing it here is: As soon as a single fragment of a consolidated mesh\n      //     passes the frustum test, the frustum check is skipped for all other contained fragments.\n      _frags.getWorldBounds(fragId, _tempBox);\n      if (!frustum.intersectsBox(_tempBox)) {\n        continue;\n      }\n\n      // mark container mesh as used so that we don't render it again in this traversal\n      _shapeDone[meshIndex] = true;\n\n      // use this consolidated mesh\n      mesh = _fragConsolidation.applyAttributes(meshIndex, _frags, drawMode, _specialHandling[meshIndex]);\n      if (!mesh.visible) {\n        // If mesh is not visible, then skip it.\n        continue;\n      }\n\n      // Check if this mesh contains a primitive type that is currently switched off\n      var geom = mesh && mesh.geometry;\n      var isLines = geom && (geom.isLines || geom.isWideLines);\n      var isPoints = geom && geom.isPoints;\n      var isHiddenPrimitive = _frags.linesHidden && isLines || _frags.pointsHidden && isPoints;\n      if (isHiddenPrimitive) {\n        continue;\n      }\n\n      // add container. \n      // Note that we must use .add here instead of children.push. Otherwise, mesh.parent is not set\n      // and mesh wouldn't inherit the model matrix from the parent scene.\n      scene.add(mesh);\n    }\n\n    // use original bbox, renderImportance, and camera distance. Note that the consolidation may actually have another bbox,\n    // because it doesn't contain exactly the same fragments. However, recomputing it would\n    // just inappropriately distort priorities, because it may contain instances far outside\n    // the current bvh node.\n    //scene here is a THREE.Scene which has no boundingBox by default and we have to create it\n    if (!scene.boundingBox) {\n      scene.boundingBox = new THREE.Box3();\n    }\n\n    // Note: The model matrix is included in the renderBatch bbox already. It is not affected by the scene.matrix.\n    renderBatch.getBoundingBox(scene.boundingBox);\n\n    scene.renderImportance = renderBatch.renderImportance;\n\n    // adopt sortObjects flag from original RenderBatch - so that RenderScene can use it to detect which\n    // scenes contain transparency.\n    scene.sortObjects = renderBatch.sortObjects;\n\n    return scene;\n  };\n\n  // enum to describe in which way a fragment has been rendered.\n  var ConsolidationType = {\n\n    Merged: 1, // Fragment is represented by a merged geometry composed from different fragment geometries.\n    Instanced: 2, // Fragment is represented by an instanced shape that represents multiple fragments that\n    // are sharing the same geometry.\n    Original: 3 // Fragment was not combined with others and is still sharing the original fragment's geometry\n    // and material.\n  };\n\n  /**\n      *  Checks if a given geometry is instanced, the result of merging, or original fragment geometry.\n      *\n      *   @param {THREE.Mesh} currently used render proxy\n      *   @param {Number}     fragId represented by this proxy\n      **/\n  function getConsolidationType(geom) {\n    if (geom.numInstances) {\n      // This geom combines multiple fragments using instancing\n      // Note that we also enter this section if numInstances==1. This is correct, because numInstances\n      // is always undef if no instance buffer is used.\n      return ConsolidationType.Instanced;\n    } else if (geom.attributes.id) {\n      // When merging fragments, we always use per-vertex ids.\n      return ConsolidationType.Merged;\n    }\n    return ConsolidationType.Original;\n  }\n\n  /**\n     *   Checks which type of consolidation has been used to represent a given fragment in the last\n     *  rendering traversal.\n     *\n     *   @returns {ConsolidationType}\n     */\n  function getFragmentConsolidationType(fragId) {\n\n    // Check if consolidation was used for this fragment in last frame.\n    if (_consolidationDisabled) {\n      // The container was not used last frame. The fragment was rendered with original geometry.\n      return ConsolidationType.Original;\n    }\n\n    // Find consolidated mesh that contains fragId.\n    var meshIndex = _fragConsolidation.fragId2MeshIndex[fragId];\n\n    // This fragment was represented using a container mesh from the consolidated scene.\n    // If this mesh was created by instancing or merging, it is tagged with a consolidation type.\n    var container = _fragConsolidation.meshes[meshIndex];\n    var geom = container.geometry;\n    return getConsolidationType(geom);\n  }\n\n  /** Updates a given render proxy mesh to make sure that it matches exactly with the fragment's representation\n     *  used in the last rendered frame.\n     *\n     *   @param {THREE.Mesh} proxy  - currently used render proxy\n     *   @param {Number}     fragId - fragment represented by this proxy\n     **/\n  this.updateRenderProxy = function (proxy, fragId) {\n\n    // if the proxy has no valid geometry, do nothing\n    if (!proxy.geometry || !proxy.geometry.attributes) {\n      return;\n    }\n\n    // check which type of geometry has been used in last rendering traversal (See ConsolidationType enum)\n    var requiredType = getFragmentConsolidationType(fragId);\n    var currentType = getConsolidationType(proxy.geometry);\n\n    // if type is already correct, we are done.\n    if (!proxy.needsUpdate && currentType == requiredType) {\n      return;\n    }\n\n    // get original fragment geometry\n    var origGeom = _frags.getGeometry(fragId);\n\n    // get container geometry that represents the fragment in the consolidation\n    var containerIndex = _fragConsolidation.fragId2MeshIndex[fragId];\n    var container = _fragConsolidation.meshes[containerIndex];\n\n    if (requiredType === ConsolidationType.Original) {\n\n      // recover original geometry, material, and matrix\n      proxy.geometry = origGeom;\n      proxy.material = _frags.getMaterial(fragId);\n      _frags.getWorldMatrix(fragId, proxy.matrix);\n\n\n    } else if (requiredType === ConsolidationType.Instanced) {\n\n      // This fragment was rendered using an instanced shape.\n\n      // replace proxy geometry by instanced mesh with single instance\n      _frags.getWorldMatrix(fragId, _tempMatrix);\n      var dbId = _frags.fragments.fragId2dbId[fragId];\n\n      // create proxy mesh with 1-element instance buffer\n      var builder = new InstanceBufferBuilder(origGeom, 1);\n      builder.addInstance(_tempMatrix, dbId);\n      proxy.geometry = builder.finish();\n\n      // use container material (needed to activate instancing)\n      proxy.material = container.material;\n\n      // reset matrix to identity, because the transform is done per instance\n      proxy.matrix.identity();\n\n    } else {// ConsolidationType.Merged:\n\n      // This fragment was rendered using a merged shape\n\n      // create consolidation proxy which just contains the single fragment with baked matrix\n      _frags.getWorldMatrix(fragId, _tempMatrix);\n      _frags.getWorldBounds(fragId, _tempBox);\n      dbId = _frags.fragments.fragId2dbId[fragId];\n      proxy.geometry = mergeGeometries([origGeom], _tempMatrix.elements, [dbId], _tempBox);\n\n      // share container material\n      proxy.material = container.material;\n\n      // reset matrix to identity, because the transform is baked into the vertex buffer\n      proxy.matrix.identity();\n    }\n\n    // Make sure we don't create the proxy mesh again until actually needed.\n    proxy.needsUpdate = false;\n\n    // make sure that WebGLRenderer does not keep an outdated cache object. Without this line,\n    // WebGLRenderer will still use the previous GeometryBuffer if it is already cached.\n    proxy.dispatchEvent({ type: 'removed' });\n  };\n}","import { ConsolidationBuilder } from \"./Consolidation\";\nimport { InstanceBufferBuilder } from \"./InstanceBufferBuilder\";\nimport { MATERIAL_VARIANT } from \"../../render/MaterialManager\";\nimport * as THREE from \"three\";\n\n/**\n                                 * This file contains code to create a Consolidation (see Consolidation.js) from all fraqments of a FragmentList.\n                                 * Rendering the consolidation instead of the individual fragments can improve rendering performance\n                                 * for models containing a large number of small objects.\n                                 */\n\n\n/**\n                                     *  Creates a consolidated representation for a given list of fragment ids. Consolidation is only done for the\n                                     *  first n elements of the fragIds array, where n is chosen in a way that we stop if a given memory cost limit is reached.\n                                     *\n                                     *  Consolidation is done here by merging fragment Geometries into larger vertex buffers. If multiple fragments share\n                                     *  the same geometry, the geometry is replicated. Therefore, this step is only used for the smaller fragments\n                                     *  with not too many instances.\n                                     *\n                                     *   @param {FragmentList}    fragList\n                                     *   @param {MaterialManager} materials\n                                     *   @param {Int32Array[]}    fragIds\n                                     *   @param {number}          limitInBytes\n                                     *\n                                     *   @returns {Object} Result object containing...\n                                     *                      result.consolidation: Instance of Consolidation\n                                     *                      result.fragIdCount:   Defines a range within fragIds:\n                                     *                                            Only fragIds[0], ... , fragIds[result.fragIdCount-1] were consolidated.\n                                     */\nfunction createConsolidationMap(fragList, materials, fragIds, limitInBytes) {\n\n  // reused in loop below\n  var fragBox = new THREE.Box3();\n\n  var mc = new ConsolidationBuilder();\n  var i = 0;\n  for (; i < fragIds.length; i++) {\n\n    // stop if we reached our memory limit.\n    if (mc.costs >= limitInBytes) {\n      break;\n    }\n\n    // get fragId and world box\n    var fragId = fragIds[i];\n    fragList.getWorldBounds(fragId, fragBox);\n\n    // add mesh to consolidation\n    var geometry = fragList.getGeometry(fragId);\n    var material = fragList.getMaterial(fragId);\n    mc.addGeom(geometry, material, fragBox, fragId);\n  }\n\n  // create ConsolidationMap\n  return mc.createConsolidationMap(fragIds, i);\n}\n\n/**\n   * Combines a sequence of fragments with shared geometry and material into an instanced mesh.\n   * This instanced mesh is added to 'result'.\n   *\n   * For fragments that cannot be instanced, we add an individual mesh instead that shares\n   * original geometry and material. This happens if:\n   *\n   *  a) The is just a single instance (range length 1)\n   *  b) The instance has a matrix that cannot be decomposed into pos/scale/rotation.\n   *\n   *  @param {FragmentList}    fragList\n   *  @param {MaterialManager} materials  - needed to create new materials for instanced shapes\n   *  @param {Int32Array}      fragIds\n   *  @param {number}          rangeStart - defines a range within the fragIds array\n   *  @param {number}          rangeEnd\n   *  @param {Consolidation}   result     - collects the resulting mesh.\n   */\nvar applyInstancingToRange = function () {\n\n  var _tempMatrix = null;\n\n  return function (model, materials, fragIds, rangeStart, rangeEnd, result) {\n\n    var fragList = model.getFragmentList();\n\n    // init temp matrix\n    if (!_tempMatrix) {_tempMatrix = new THREE.Matrix4();}\n\n    var firstFrag = fragIds[rangeStart];\n\n    // get geometry and material (must be the same for all frags in the range)\n    var geom = fragList.getGeometry(firstFrag);\n    var mat = fragList.getMaterial(firstFrag);\n\n    // just a single instance? => add it directly\n    var rangeLength = rangeEnd - rangeStart;\n    if (rangeLength == 1) {\n      result.addSingleFragment(fragList, firstFrag);\n      return;\n    }\n    var lastIndex = rangeEnd - 1;\n\n    // create instanced geometry from geom and all transforms\n    var builder = new InstanceBufferBuilder(geom, rangeLength);\n    for (var i = rangeStart; i <= lastIndex; i++) {\n\n      var fragId = fragIds[i];\n\n      // world matrix and dbId\n      fragList.getOriginalWorldMatrix(fragId, _tempMatrix);\n      var dbId = fragList.fragments.fragId2dbId[fragId];\n\n      // try to process as instanced mesh\n      var valid = builder.addInstance(_tempMatrix, dbId);\n\n      // If adding this instance failed, its matrix did not allow to\n      // be represented as pos/rotation/scale. In this case, add\n      // the mesh individually.\n      if (!valid) {\n        // Swap last and current. This keeps all of the fragments\n        // in the instanced buffer together.\n        var tmp = fragIds[lastIndex];\n        fragIds[lastIndex] = fragId;\n        fragIds[i] = tmp;\n        --i;\n        --lastIndex;\n      }\n    }\n\n    var instGeom = builder.finish();\n\n    // instGeom might be null if all instances had matrices that could not be decomposed.\n    // In this case, all frags have been skipped and will be added individually below\n    if (instGeom) {\n\n      // create instancing material\n      var instMat = materials.getMaterialVariant(mat, MATERIAL_VARIANT.INSTANCED, model);\n\n      // add instanced mesh\n      result.addContainerMesh(instGeom, instMat, fragIds, rangeStart, rangeLength);\n      // Set start of fragment id range.\n      result.meshes[result.meshes.length - 1].rangeStart = rangeStart;\n    }\n\n    // if we had to skip any fragment, add it separately. Note that this must be done after\n    // adding the container, so that fragId2MeshIndex finally refers to the individual geometry.\n    for (i = lastIndex + 1; i < rangeEnd; i++) {\n      fragId = fragIds[i];\n      result.addSingleFragment(fragList, fragId);\n    }\n  };\n}();\n\n/**\n      * Combines fragments with shared geometries into instanced meshes. Note that creating instanced meshes\n      * only makes sense for fragments that share geometry and material. All other fragments will also be\n      * added to the result, but the meshes will share original geometry and material.\n      *\n      * Requirement: fragIds must already be sorted in a way that meshes with identical geometry and material form\n      *              a contiguous range.\n      *\n      * @param {RenderModel}   model\n      * @param {MaterialManager} materials\n      * @param {Int32Array}     fragIds\n      * @param [number}         startIndex - Defines the range in fragIds that we process:\n      *                                      fragIds[startIndex], ..., fragIds[fragIds.length-1]\n      * @param {Consolidation} result      - collects all output meshes\n      */\nfunction applyInstancing(model, materials, fragIds, startIndex, result) {\n\n  var fragList = model.getFragmentList();\n\n  if (startIndex >= fragIds.length) {\n    // range empty\n    // This may happen if we could consolidate all fragments per mesh merging already, so\n    // that instancing is not needed anymore.\n    return;\n  }\n\n  // track ranges of equal geometry and material\n  var rangeStart = startIndex;\n  var lastGeomId = -1;\n  var lastMatId = -1;\n\n  for (var i = startIndex; i < fragIds.length; i++) {\n    var fragId = fragIds[i];\n    var geomId = fragList.getGeometryId(fragId);\n    var matId = fragList.getMaterialId(fragId);\n\n    // check if a new range starts here\n    if (geomId != lastGeomId || matId != lastMatId) {\n\n      // a new range starts at index i\n      // => process previous range [rangeStart, ..., i-1]\n      if (i != startIndex) {\n        applyInstancingToRange(model, materials, fragIds, rangeStart, i, result);\n      }\n\n      // start new range\n      rangeStart = i;\n      lastGeomId = geomId;\n      lastMatId = matId;\n    }\n  }\n  // process final range\n  applyInstancingToRange(model, materials, fragIds, rangeStart, fragIds.length, result);\n}\n\n/**\n   * Creates an array that provides the number of instance for each geometry id.\n   *\n   * @param {FragmentList} fragList\n   * @returns {number[]}   geomInstanceCount\n   */\nfunction countGeometryInstances(fragList) {\n\n  var fragCount = fragList.getCount();\n\n  // count instances of each geometry\n  var geomInstanceCount = [];\n  for (var fragId = 0; fragId < fragCount; fragId++) {\n    var geomId = fragList.getGeometryId(fragId);\n    var numInstances = geomInstanceCount[geomId] | 0;\n    geomInstanceCount[geomId] = numInstances + 1;\n  }\n  return geomInstanceCount;\n}\n\n/**\n   * Returns an array that enumerates all fragIds in a way that...\n   *\n   *  1. They are ordered by increasing memory costs that it takes to consolidate them.\n   *  2. FragIds with equal geometry and material form a contiguous range.\n   *\n   *   @param {FragmentList} fragList\n   *   @param {number[]}     geomInstanceCount (see countGeometryInstances)\n   *   @returns {Int32Array} ordered list of fragment ids\n   */\nfunction sortByConsolidationCosts(fragList, geomInstanceCount) {\n\n  // define sort predicate\n  function fragCompare(fragId1, fragId2) {\n\n    // compute consolidation costs of both fragments\n    var geom1 = fragList.getGeometry(fragId1);\n    var geom2 = fragList.getGeometry(fragId2);\n    var geomId1 = fragList.getGeometryId(fragId1);\n    var geomId2 = fragList.getGeometryId(fragId2);\n    var instCount1 = geomInstanceCount[geomId1];\n    var instCount2 = geomInstanceCount[geomId2];\n    var memCost1 = instCount1 * geom1.byteSize;\n    var memCost2 = instCount2 * geom2.byteSize;\n\n    // 1. memCost\n    if (memCost1 != memCost2) {\n      return memCost1 - memCost2;\n    }\n\n    // 2. geom id\n    if (geom1.id != geom2.id) {\n      return geom1.id - geom2.id;\n    }\n\n    // 3. material id\n    var mat1 = fragList.getMaterialId(fragId1);\n    var mat2 = fragList.getMaterialId(fragId2);\n    return mat1 - mat2;\n  }\n\n  // a single missing geometry shouldn't make the whole consolidation fail.\n  // therefore, we exclude any null-geometry fragemnts.\n  var validFrags = 0;\n\n  // create fragId array [0,1,2,...]\n  var fragCount = fragList.getCount();\n  var fragIds = new Int32Array(fragCount);\n  for (var i = 0; i < fragCount; i++) {\n\n    // exclude fragments without valid geometry\n    if (!fragList.getGeometry(i)) {\n      continue;\n    }\n\n    fragIds[validFrags] = i;\n    validFrags++;\n  }\n\n  // resize array if we had to skip fragments\n  if (validFrags < fragCount) {\n    fragIds = new Int32Array(fragIds.buffer, fragIds.byteOffset, validFrags);\n  }\n\n  // sort by costs\n  if (!fragIds.sort) {\n    // Unfortunately, there is no official polyfill for TypedArray.sort.\n    // Therefore, we just use Array.sort. The extra copy makes it inappropriate\n    // for a general polyfill, but it's sufficient for this case.\n    var thanksIE11ForWastingOurTime = new Array(fragCount);\n\n    // Just copy by hand to avoid even more compatibility issues\n    for (i = 0; i < fragCount; i++) {\n      thanksIE11ForWastingOurTime[i] = fragIds[i];\n    }\n\n    thanksIE11ForWastingOurTime.sort(fragCompare);\n\n    for (i = 0; i < fragIds.length; i++) {\n      fragIds[i] = thanksIE11ForWastingOurTime[i];\n    }\n  } else {\n    fragIds.sort(fragCompare);\n  }\n\n  return fragIds;\n}\n\n/**\n   * Determines for each geometry whether to store it on GPU or only CPU-side. The heuristic is the same that is\n   * always used by GeometryList. However, when using consolidation, we first spend GPU Ram for the consolidated\n   * meshes (with are used more for rendering). The original fragment geometry is only stored on GPU\n   * if enough budget is left.\n   *\n   *   @param {FragmentList}         fragList\n   *   @param {Consolidation}        consolidation\n   *   @param {number[]}             geomInstanceCount - see countGeometryInstances().\n   *   @param {FireFlyWebGLRenderer} glRenderer        - needed to free GPU memory if needed\n   */\nfunction chooseMemoryTypes(fragList, consolidation, geomInstanceCount, glRenderer) {\n\n  var geomList = fragList.geoms;\n\n  // some geometries are shared by consolidation and original fragments. We track their ids to\n  // make sure that we don't process them twice.\n  var geomShared = [];\n\n  // track required GPU memory and number of meshes on GPU, because both are restricted (see geomList.chooseMemoryType)\n  var gpuNumMeshes = 0;\n  var gpuMeshMemory = 0;\n  for (var i = 0; i < consolidation.meshes.length; i++) {\n\n    var mesh = consolidation.meshes[i];\n    var geom = mesh.geometry;\n\n    // compute byteSize if not available.\n    if (!geom.byteSize) {\n      geom.byteSize = (geom.vb.byteLength || 0) + (geom.ib.byteLength || 0);\n    }\n\n    // If the mesh has a well-defined fragId, this geometry is shared with a fragment that could\n    // not be consolidated with others.\n    var isSharedFragmentGeometry = Number.isInteger(mesh.fragId);\n\n    // choose whether to store on GPU or CPU\n    geomList.chooseMemoryType(geom, geom.numInstances, gpuNumMeshes, gpuMeshMemory);\n\n    // track overall GPU workload\n    if (!geom.streamingDraw) {\n      gpuMeshMemory += geom.byteSize;\n      gpuNumMeshes += 1;\n\n      // consolidated meshes are purely used for rendering. So, we can discard\n      // the CPU-side copy as soon as the data are on GPU. Note that we must not\n      // do this for shared original fragment geometry - which is exposed to the client.\n      if (!isSharedFragmentGeometry) {\n        geom.discardAfterUpload = true;\n      }\n    }\n\n    if (isSharedFragmentGeometry) {\n      // this mesh is sharing original fragment geometry.\n      geomShared[geom.id] = true;\n    }\n  }\n\n  // Finally, revise the memory type for the original GeometryList again. This time, we consider\n  // the workload that we already spent on for the consolidation and only allow geometry to be stored on GPU if\n  // our budget is not consumed yet.\n  for (i = 1; i < geomList.geoms.length; i++) {// skip index 0, because it is reserved for \"invalid geom id\"\n\n    // get next geom\n    geom = geomList.geoms[i];\n    if (!geom) {\n      continue;\n    }\n\n    // if this geometry is shared by the consolidation, the memory type has already been set in the loop above.\n    if (geomShared[i]) {\n      continue;\n    }\n\n    // determine nen tyoe for this geom\n    var numInstances = geomInstanceCount[i];\n    geomList.chooseMemoryType(geom, numInstances, gpuNumMeshes, gpuMeshMemory);\n\n    if (geom.streamingDraw) {\n      // A geometry might already have been GPU-uploaded and displayed during progressive loading.\n      // If we now decided to keep this geometry CPU side, make sure that we don't keep any of these on GPU anymore.\n      glRenderer.deallocateGeometry(geom);\n    }\n\n    // track overall GPU workload\n    if (!geom.streamingDraw) {\n      gpuMeshMemory += geom.byteSize;\n      gpuNumMeshes += 1;\n    }\n  }\n}\n\n/**\n   *  Creates a consolidated representation of a fragments. For each fragment f, there will be a mesh in the result that\n   *  contains it - or shares its geometry if was not mergeable with any other fragment.\n   *\n   *   @param {FragmentList}    fraglist\n   *   @param {MaterialManager} materials           - needed to create new material variants for consolidated/instanced meshes\n   *   @param {number}          [byteLimit = 100MB] - Restricts the amount of memory that we spend in mesh consolidation.\n   *                                                  Note that without this limit, consolidation may consume several times more memory\n   *                                                  than the original model itself, because shared geometries must be replicated.\n   *   @param {ConsolidationMap} [consMap]          - Optional: If available, the intermediate results can be reused from a previous\n   *                                                  consolidation to accelerate preprocessing. Note that a ConsolidationMap\n   *                                                  can only be reused if the FragmentList is exactly the same.\n   *   @param {FireFlyWebGLRenderer} glRenderer\n   *\n   *   @returns {Consolidation}\n   */\nexport function consolidateFragmentList(model, materials, byteLimit, glRenderer, consMap) {\n\n  var fragList = model.getFragmentList();\n\n  // check if we can use hardware instancing\n  var enableInstancing = glRenderer.supportsInstancedArrays();\n\n  // by default, restrict extra memory consumption to 100 MB\n  byteLimit = byteLimit || 100 << 20;\n\n  // check number of instances for each geometry id\n  var geomInstanceCount = countGeometryInstances(fragList);\n\n  // If not available yet, create ConsolidationMap that describes the mapping from src fragments\n  // into consolidated meshes.\n  if (!consMap) {\n    // sort by costs\n    var sortedFragIds = sortByConsolidationCosts(fragList, geomInstanceCount);\n\n    // create consolidation map\n    consMap = createConsolidationMap(fragList, materials, sortedFragIds, byteLimit);\n  }\n\n  // Create Consolidation\n  var result = consMap.buildConsolidation(fragList, materials, model); // {Consolidation}\n\n  // the first n=numConsolidated fragments in fragIds are consolidated already.\n  // The remaining fragIds are now processed using instancing.\n  var fragIds = consMap.fragOrder;\n  var numConsolidated = consMap.numConsolidated;\n\n  if (enableInstancing) {\n    // Optimize the rest with instancing (takes less extra memory)\n    applyInstancing(model, materials, fragIds, numConsolidated, result);\n  } else {\n    // We cannot use instancing => Add all remaining fragments individually\n    for (var i = numConsolidated; i < fragIds.length; i++) {\n      var fragId = fragIds[i];\n      result.addSingleFragment(fragList, fragId);\n    }\n  }\n\n  // determine which geometries we upload to GPU. All remaining ones are stored CPU-side\n  // and rendered using streaming-draw (slower, but better than GPU memory overload)\n  chooseMemoryTypes(fragList, result, geomInstanceCount, glRenderer);\n\n  // Set modelId for all consolidated meshes (needed to distinguish multiple models via ID-buffer)\n  var modelId = model.getModelId();\n  for (i = 0; i < result.meshes.length; i++) {\n    var mesh = result.meshes[i];\n    mesh.modelId = modelId;\n  }\n\n  return result;\n}","/**\n * A GeomMergeTask is used for mesh consolidation. It fills vertex buffer and id buffer of a consolidated mesh\n * based on a set of compatible input meshes.\n *\n * GeomMergeTask is shared by main wgs script and worker script, so that the same code can be used for single-threaded\n * and multi-threaded consolidation.\n */\n\n// unique task ids\nvar _nextTaskId = 1;\nfunction createTaskId() {return _nextTaskId++;}\n\nexport function GeomMergeTask() {\n\n  // Interleaved vertex buffers as Float32Array.\n  this.vb = null;\n\n  // floats per vertex\n  this.vbstride = 0;\n\n  // offsets in floats where to find position/normal in vertex buffer\n  this.posOffset = 0;\n  this.normalOffset = 0;\n\n  // matrices per src-geom (Float32Array with 16 floats per matrix)\n  this.matrices = null;\n  this.ranges = null;\n\n  // must be an Uint32Array that we can efficiently hand-over to the worker\n  this.dbIds = null;\n\n  // unique task-id used to find BufferGeometry when a merged vb is returned from worker\n  this.id = createTaskId();\n}\n\n/**\n   *  Packs a Vector3 normal vector into 2 components. This is a CPU-side implementation of PackNormalsShaderChunk\n   *  (see ShaderChunks.js)\n   *\n   *   @param {THREE.Vector3|LmvVector3} normal - InOut normal vector.\n   *\n   *  Note that 'normal' must be normalized!\n   */\nfunction encodeNormal(normal) {\n  normal.x = 0.5 * (1.0 + Math.atan2(normal.y, normal.x) / Math.PI);\n  normal.y = 0.5 * (1.0 + normal.z);\n  normal.z = 0.0; // not used for result\n}\n\n/**\n   * @param {THREE.Vector3|LmvVector3} normal - InOut normal vector. Input z is ignored.\n   */\nfunction decodeNormal(normal) {\n  var angX = 2.0 * normal.x - 1.0;\n  var angY = 2.0 * normal.y - 1.0;\n  var scthX = Math.sin(angX * Math.PI);\n  var scthY = Math.cos(angX * Math.PI);\n  var scphiX = Math.sqrt(1.0 - angY * angY);\n  var scphiY = angY;\n  normal.x = scthY * scphiX;\n  normal.y = scthX * scphiX;\n  normal.z = scphiY;\n}\n\n/**\n   *  Writes a dbId into 4 subsequent bytes of an Uint8Array. (4th is only for alignment and always 0)\n   *   @param {Number}     dbId\n   *   @param {Uint8Array} bufferUint8 - view into the vertex buffer that we write to.\n   *   @param {Number}     writeIndex  - Index into the uint8 array where we write the first byte.\n   */\nexport function writeIdToBuffer(dbId, bufferUint8, writeIndex) {\n  bufferUint8[writeIndex++] = dbId & 0xff;\n  bufferUint8[writeIndex++] = dbId >> 8 & 0xff;\n  bufferUint8[writeIndex++] = dbId >> 16 & 0xff;\n  bufferUint8[writeIndex] = 0; // dbIds are only vec3 in the shader\n}\n\n// We don't have THREE.Matrix3 in a worker, so that we cannot use getNormalTransform()\nfunction getNormalMatrix(matrix, dstMatrix) {\n\n  // eliminate translation part\n  dstMatrix.copy(matrix);\n  dstMatrix[12] = 0;\n  dstMatrix[13] = 0;\n  dstMatrix[14] = 0;\n\n  // tranpose of inverse\n  return dstMatrix.getInverse(dstMatrix).transpose();\n}\n\n/**\n   *  Transforms positions and normals of a vertex buffer range.\n   *\n   *  NOTE: Only interleaved buffers with packed normals are supported.\n   *\n   *   @param {GeomInfo}      geom\n   *   @param {Uint16Array}   vbUint16     - additional uint16-view to interleaved vertex-buffer\n   *   @param {LmvMatrix4}    matrix\n   *   @param {Number}        [rangeStart] - First vertex to transform. (default: 0)\n   *   @param {Number}        [rangeEnd]   - End of vertex range.       (default: #vertices)\n   *   @param {LmvMatrix4}    tmpMatrix    - reused tmp matrix\n   *   @param {LmvVector3}    tmpVec       - reused tmp vector\n   */\nvar transformVertexRange = function transformVertexRange(geom, vbUint16, matrix, rangeStart, rangeEnd, tmpMatrix, tmpVec) {\n\n  // transform positions\n  var posOffset = geom.posOffset;\n  for (var i = rangeStart; i < rangeEnd; i++) {\n\n    // read vertex position i\n    var offset = i * geom.vbstride + posOffset;\n    tmpVec.set(geom.vb[offset], geom.vb[offset + 1], geom.vb[offset + 2]);\n\n    tmpVec.applyMatrix4(matrix);\n\n    // write vertex position i\n    geom.vb[offset] = tmpVec.x;\n    geom.vb[offset + 1] = tmpVec.y;\n    geom.vb[offset + 2] = tmpVec.z;\n  }\n\n  // transform normals (if available)\n  if (geom.normalOffset !== -1) {\n\n    // To transform normals, we need an Uint16-view to the data.\n    // Packed normals are 2-component Uint16-vectors.\n    var uint16PerVertex = geom.vbstride * 2; // Multiply by 2, because vbstride and itemOffset\n    var uint16NormalOffset = geom.normalOffset * 2; // are counting 32Bit floats.\n    var maxUint16 = 0xFFFF;\n\n    // compute normal transform\n    var normalMatrix = getNormalMatrix(matrix, tmpMatrix);\n\n    // transform normal vectors\n    for (i = rangeStart; i < rangeEnd; i++) {\n      // read byte-normal of vertex i\n      var normalIndex = i * uint16PerVertex + uint16NormalOffset;\n      tmpVec.set(vbUint16[normalIndex], vbUint16[normalIndex + 1], 0.0);\n\n      // decode to vec3 with components in [0,1]\n      tmpVec.divideScalar(maxUint16);\n      decodeNormal(tmpVec);\n\n      // Note that normalMatrix is a LmvMatrix4 (although we only use 3x3 matrix)\n      tmpVec.applyMatrix4(normalMatrix);\n\n      // Note that encodeNormal requires normalized values. Although a decodedNormal is\n      // always normalized, the normalMatrix may involve a scaling.\n      tmpVec.normalize();\n\n      // encode back to 2-component uint16\n      encodeNormal(tmpVec);\n      tmpVec.multiplyScalar(maxUint16);\n\n      // write back to vertex buffer\n      vbUint16[normalIndex] = tmpVec.x;\n      vbUint16[normalIndex + 1] = tmpVec.y;\n    }\n  }\n};\n\n// read matrix i from Float32 array to target LmvMatrix4\nfunction getMatrix(index, array, target) {\n  // TypedArray.set does not support a srcOffset parameter. So we have to use manual copy here.\n  var offset = 16 * index;\n  for (var i = 0; i < 16; i++) {\n    target.elements[i] = array[i + offset];\n  }\n}\n\n/**\n   *  Run merge task. This can be done using Vector/Matrix types from THREE (in main) or LmvVector/LmvMatrix (worker).\n   *  To define which types to use while keeping the code independent, a preallocated matrix/vector must be provided.\n   *\n   *  @param {LmvMatrix4|THREE.Matrix4} matrix\n   *  @param {LmvVector3|THREE.Vector3} vector\n   *  @returns {Object} - merge result r, containing\n   *                        {number}       r.id:        task id\n   *                        {Float32Array} r.vb:        merged interleaved vertex buffer\n   *                        {Uint8Array}   r.vertexIds: buffer for separate per-vertex id attribute\n   */\nGeomMergeTask.prototype.run = function (matrix, vec) {\n\n  var vb = this.vb;\n  var vertexCount = vb.length / this.vbstride;\n\n  var tmpMatrix = matrix.clone();\n\n  // create buffer for per-vertex ids of consolidated mesh\n  var IDBytesPerVertex = 3;\n  var dstIds = new Uint8Array(IDBytesPerVertex * vertexCount);\n\n  // to transform normals, we need an Uint16-view to the interleaved vertex buffer.\n  // packed normals are 2-component Uin16-vectors.\n  var hasNormals = this.normalOffset !== -1;\n  var vbUint16 = hasNormals ? new Uint16Array(vb.buffer, vb.byteOffset, vb.length * 2) : null;\n\n  // transform vertex-range and write ids. Each range corresponds to a source fragment geometry\n  var ranges = this.ranges;\n  var matrices = this.matrices;\n  var numRanges = ranges.length - 1; // note that ranges contains an extra element for the last range end\n  for (var j = 0; j < numRanges; j++) {\n\n    // get vertex range corresponding to src geom i\n    var rangeBegin = ranges[j];\n    var rangeEnd = ranges[j + 1];\n\n    // get matrix for src geom i\n    getMatrix(j, matrices, matrix);\n\n    // transform vertex positions and normals in this range\n    transformVertexRange(this, vbUint16, matrix, rangeBegin, rangeEnd, tmpMatrix, vec);\n\n    // assign dbId to all vertices of this range\n    var dstIdsByteOffset = rangeBegin * IDBytesPerVertex;\n    var rangeLength = rangeEnd - rangeBegin;\n    var dbId = this.dbIds[j];\n    for (var k = 0; k < rangeLength; k++) {\n      writeIdToBuffer(dbId, dstIds, dstIdsByteOffset);\n      dstIdsByteOffset += IDBytesPerVertex;\n    }\n  }\n\n  // return result object. It contains everything we need to finish a single consolidated mesh.\n  return {\n    taskId: this.id,\n    vb: this.vb, // note that we have to pass back the byte-view\n    vertexIds: dstIds };\n\n};","import { copyVertexFormat, copyPrimitiveProps } from './Consolidation';\nimport { writeIdToBuffer } from './GeomMergeTask';\nimport { createBufferGeometry } from '../BufferGeometry';\nimport { logger } from \"../../../logger/Logger\";\nimport * as THREE from \"three\";\n\n/**\n                                 * @class Combines multiple instances of a GeometryBuffer into a single GeometryBuffer that uses hardware instancing.\n                                 *        Input is a single geometry and a sequence of matrix/dbId pairs. Result is a single THREE.Mesh that contains\n                                 *        transforms and dbIds as instance buffer.\n                                 * @constructor\n                                 *  @param {BufferGeometr} srcGeom - Geometry shared by all instances. vb and ib of this buffer will be shared.\n                                 *                                   (unfortunately not on GPU though, because WebGLRenderer doesn't detect support\n                                 *                                   sharing among different GeometryBuffers.)\n                                 *  @param {number} capacity       - Number of instances to be added. It should match the number of instances\n                                 *                                   to avoid wasting memory.\n                                 */\nexport function InstanceBufferBuilder(srcGeom, capacity) {\n\n  // create new geometry that shares vb, ib, and per-vertex attributes\n  var _result = createBufferGeometry();\n  _result.ib = srcGeom.ib;\n  _result.vb = srcGeom.vb;\n  _result.iblines = srcGeom.iblines;\n  copyVertexFormat(srcGeom, _result);\n  copyPrimitiveProps(srcGeom, _result);\n\n  // Currently, we actually write 3 bytes per id. It might be better to use an additional byte for aligment,\n  // but non-interleaved BufferAttributes do currently not support that.\n  var IDItemSize = 3; // IDs are vec3 in the shader\n  var IDBytesPerInstance = 3;\n\n  // buffers that are incrementally filled with addInstance calls\n  this.offsets = new Float32Array(3 * capacity); // Vector3\n  this.rotations = new Float32Array(4 * capacity); // Quaternion\n  this.scalings = new Float32Array(3 * capacity); // Vector3\n  this.ids = new Uint8Array(IDBytesPerInstance * capacity); // Vec3<Uint8>\n\n  // temp objects for reuse\n  var _offset = new THREE.Vector3();\n  var _quat = new THREE.Quaternion();\n  var _scale = new THREE.Vector3();\n\n  var _tempMatrix = new THREE.Matrix4();\n\n  // number of added instance transforms so far\n  var _counter = 0;\n\n  var _capacity = capacity;\n\n  /**\n                             *  Decomposition of a matrix into translation, rotation, and scale is mostly possible\n                             *  but not always. If a matrix decomposition is wrong, THREE.Matrix4.decompose() will just\n                             *  return a wrong result. Therefore, we have to compose it back and compare to see if it\n                             *  was valid.\n                             */\n  function decompositionValid(srcMatrix, offset, quat, scale) {\n\n    // compose matrix\n    _tempMatrix.compose(offset, quat, scale);\n\n    // compare with source matrix\n    var Tolerance = 0.00001;\n    var ma = srcMatrix.elements;\n    var mb = _tempMatrix.elements;\n    for (var i = 0; i < 16; i++) {\n      var a = ma[i];\n      var b = mb[i];\n      if (Math.abs(b - a) > Tolerance) {\n        return false;\n      }\n    }\n    return true;\n  }\n\n  /**\n     *  Add next instance. Make sure that you don't exceed the initially given capacity.\n     *\n     * @param {THREE.Matrix4} transform\n     * @param {number}        dbId\n     * @returns {boolean}     True:  Instance was successfully added.\n     *                        False: Instance could not be added, because the matrix could not be decomposed.\n     */\n  // Must be called 'numInstances' times to fill the instance buffer.\n  this.addInstance = function (transform, dbId) {\n\n    if (_counter >= _capacity) {\n      logger.warn(\"Instance buffer is already full.\");\n      return false;\n    }\n\n    // decompose transform\n    transform.decompose(_offset, _quat, _scale);\n\n    // We can only add instances for which the instance matrix can be decomposed.\n    // Otherwise, the transform of the instancing version would be wrong.\n    if (!decompositionValid(transform, _offset, _quat, _scale)) {\n      return false;\n    }\n\n    // write offset\n    this.offsets[3 * _counter] = _offset.x;\n    this.offsets[3 * _counter + 1] = _offset.y;\n    this.offsets[3 * _counter + 2] = _offset.z;\n\n    // write rotation\n    this.rotations[4 * _counter] = _quat.x;\n    this.rotations[4 * _counter + 1] = _quat.y;\n    this.rotations[4 * _counter + 2] = _quat.z;\n    this.rotations[4 * _counter + 3] = _quat.w;\n\n    // write scale\n    this.scalings[IDBytesPerInstance * _counter] = _scale.x;\n    this.scalings[IDBytesPerInstance * _counter + 1] = _scale.y;\n    this.scalings[IDBytesPerInstance * _counter + 2] = _scale.z;\n\n    // write dbId\n    writeIdToBuffer(dbId, this.ids, IDBytesPerInstance * _counter);\n\n    _counter++;\n\n    return true;\n  };\n\n  /**\n      * Call this after adding all transforms to get instanced geometry.\n      *  @returns {null|THREE.Mesh} Returns instanced GeometryBuffer if >=1 instances have been added successfully.\n      */\n  // note that addInstance() must be called for each instance transform first.\n  this.finish = function () {\n\n    // no instances\n    if (_counter == 0) {\n      return null;\n    }\n\n    // In special cases, we had to reject some addInstance() calls, so that the\n    // instance buffer is not fully used. In this case, we create smaller views\n    // to the same buffers that ignore the unused elements at the end.\n    if (_counter < _capacity) {\n      this.offsets = new Float32Array(this.offsets.buffer, 0, 3 * _counter); // Vector3\n      this.rotations = new Float32Array(this.rotations.buffer, 0, 4 * _counter); // Quaternion\n      this.scalings = new Float32Array(this.scalings.buffer, 0, 3 * _counter); // Vector3\n      this.ids = new Uint8Array(this.ids.buffer, 0, IDBytesPerInstance * _counter); // Vec3<Uint8>\n    }\n\n    // add attributes for transforms\n    var offsetAttrib = new THREE.BufferAttribute(this.offsets, 3);\n    var rotationAttrib = new THREE.BufferAttribute(this.rotations, 4);\n    var scalingAttrib = new THREE.BufferAttribute(this.scalings, 3);\n    var idAttrib = new THREE.BufferAttribute(this.ids, IDItemSize);\n\n    idAttrib.normalize = true;\n    idAttrib.bytesPerItem = 1;\n\n    // mark attributes as \"per-instance\" (instead of per-vertex as default)\n    offsetAttrib.divisor = 1;\n    rotationAttrib.divisor = 1;\n    scalingAttrib.divisor = 1;\n    idAttrib.divisor = 1;\n\n    _result.addAttribute('instOffset', offsetAttrib);\n    _result.addAttribute('instRotation', rotationAttrib);\n    _result.addAttribute('instScaling', scalingAttrib);\n    _result.addAttribute('id', idAttrib);\n\n    _result.numInstances = _counter;\n\n    // add byte size for memory tracking (vertices + indices + instances)\n    _result.byteSize = _result.vb.byteLength + _result.ib.byteLength +\n    this.offsets.byteLength + this.rotations.byteLength + this.scalings.byteLength;\n\n    return _result;\n  };\n}","import { GeomMergeTask } from \"./GeomMergeTask\";\nimport { getVertexCount } from \"../VertexEnumerator\";\nimport { createWorkerWithIntercept } from '../../../file-loaders/main/WorkerCreator';\nimport { LmvMatrix4 as Matrix4 } from '../LmvMatrix4';\nimport { LmvVector3 as Vector3 } from '../LmvVector3';\n\n/** Computes ranges in consolidated vertex buffer:\n                                                        *  When merging geoms into a single vertex buffer, each source geometry geoms[i] will correspond to a range\n                                                        *  in the merged vertex buffer. These function computes these ranges. From the returned array, a range\n                                                        *  corresponding to src fragment i can be obtained by:\n                                                        *   - rangeBegin = ranges[i]\n                                                        *   - rangeEnd   = ranges[i+1] (exclusive)\n                                                        *  Note that ranges.length is #geoms + 1.\n                                                        *\n                                                        * @param {BufferGeometry} geoms - pointers to src fragment geoms to be merged.\n                                                        * @returns {Uint16Array}\n                                                        */\nfunction createRangeArray(geoms) {\n\n  var ranges = new Uint16Array(geoms.length + 1);\n  var rangeStart = 0;\n  for (var i = 0; i < geoms.length; i++) {\n    ranges[i] = rangeStart;\n    rangeStart += getVertexCount(geoms[i]);\n  }\n  // add end of final range\n  ranges[i] = rangeStart;\n  return ranges;\n}\n\n/**\n   * Init merge task from src geometries.\n   *\n   * @param {BufferGeometry[]} geoms      - input geometries\n   * @param {BufferGeometry}   targetGeom - consolidated geometry (just copied, not transformed yet)\n   * @param {Float32Array}     matrices   - transforms per range (each matrix stored as 16 subsequent floats)\n   * @param {Int32Array}       dbIds      - dbIds per src fragment - used by worker to build per-vertex id buffer\n   * @constructor\n   */\nfunction createMergeTask(geoms, targetGeom, matrices, dbIds) {\n\n  var ranges = createRangeArray(geoms);\n  var task = new GeomMergeTask();\n\n  // Interleaved vertex buffers as Float32Array\n  task.vb = targetGeom.vb;\n\n  // floats per vertex\n  task.vbstride = targetGeom.vbstride;\n\n  // offsets in floats where to find position/normal in vertex buffer\n  task.posOffset = targetGeom.attributes.position.itemOffset;\n  task.normalOffset = targetGeom.attributes.normal ? targetGeom.attributes.normal.itemOffset : -1; // -1 for \"no normals\"\n\n  // matrices per src-geom (Float32Array with 16 floats per matrix)\n  task.matrices = matrices;\n  task.ranges = ranges;\n\n  // must be an Uint32Array that we can efficiently hand-over to the worker\n  task.dbIds = dbIds;\n\n  return task;\n}\n\n/*\n   * Writes the result of a GeomMergeTask back to a BufferGeometry.\n   *  @param {Object}         mergeResult - returned by GeomMergeTask.run()\n   *  @param {BufferGeometry} targetGeom  - BufferGeometry that will use the consolidated buffers\n   */\nfunction applyMergeResult(mergeResult, targetGeom) {\n  targetGeom.vb = mergeResult.vb; // interleaved vertex-buffer  {Float32Array}\n  targetGeom.attributes.id.array = mergeResult.vertexIds; // buffer with per-vertex ids {Uint32Array}\n  targetGeom.needsUpdate = true;\n}\n\n/**\n   * Helper class used to delegate a part of the geometry merging work to a worker thread.\n   *   @param {Consolidation} consolidation - Consolidation.inProgress will be true as long as workers are running.\n   */\nexport function ParallelGeomMerge(consolidation) {\n\n  // Currently, we hardwire to just use 2 workers. With more workers, the single workers finished faster, but\n  // for the overall time until all results are returned, I couldn't measure any benefit so far.\n  var numWorkers = 2;\n\n  // Track how many workers have to deliver their result before the consolidation is ready to use.\n  var _workersRunning = 0;\n\n  // indexed by task id. Contains BufferGeometries of consolidated meshes that are waiting for their merged vertex buffer.\n  var _receiverGeoms = {};\n\n  // MergeTask[] - one per addMergeTask() call\n  var _tasks = [];\n\n  // {Consolidation} - We set consolidation.inProgress as long as workers are running. This makes sure that\n  // \t\t\t\t\t the consolidation is not used before it is fully finished.\n  var _consolidation = consolidation;\n\n  // workers\n  var _workers = new Array(numWorkers);\n\n  /**\n                                         * Called in mergeGeometry (Consolidation.js) to delegate merge work to worker thread.\n                                         * See MergeTask ctor for params.\n                                         */\n  this.addMergeTask = function (geoms, targetGeom, matrices, dbIds) {\n\n    var task = createMergeTask(geoms, targetGeom, matrices, dbIds);\n    _tasks.push(task);\n\n    // remember which BufferGeometry will get the merged vertex buffer\n    _receiverGeoms[task.id] = targetGeom;\n  };\n\n  /**\n      * After adding merge tasks, this function passes all collected input to the workers and\n      * starts them.\n      */\n  this.runTasks = function () {\n\n    // init workers\n    for (var i = 0; i < numWorkers; i++) {\n      _workers[i] = ParallelGeomMerge.createWorker();\n      _workers[i].addEventListenerWithIntercept(handleGeomMergeResult);\n    }\n\n    // subdivide task array into ranges, where each range is processed by a separate worker\n    var numTasks = _tasks.length;\n    var tasksPerWorker = Math.floor(numTasks / numWorkers);\n    for (var r = 0; r < numWorkers; r++) {\n\n      // define next range\n      var lastCycle = r === numWorkers - 1;\n      var rangeBegin = r * tasksPerWorker;\n      var rangeEnd = lastCycle ? numTasks : rangeBegin + tasksPerWorker;\n\n      var rangeLength = rangeEnd - rangeBegin;\n\n      // array of tasks for this worker\n      var tasks = [];\n\n      // add all buffers and matrix arrays to transfer-list\n      var transferList = new Array(4 * rangeLength);\n      var index = 0;\n      for (i = rangeBegin; i < rangeEnd; i++) {\n        var task = _tasks[i];\n        transferList[index++] = task.vb.buffer;\n        transferList[index++] = task.matrices.buffer;\n        transferList[index++] = task.ranges.buffer;\n        transferList[index++] = task.dbIds.buffer;\n\n        tasks.push(task);\n      }\n\n      // start worker task\n      var msg = {\n        operation: \"MERGE_GEOMETRY\",\n        tasks: tasks };\n\n\n      var worker = _workers[r];\n      worker.doOperation(msg, transferList);\n\n      _workersRunning++;\n    }\n\n    // mark consolidation as unusable until all workers are finished\n    _consolidation.inProgress = true;\n  };\n\n  /**\n      * Handles messages returned from worker threads\n      * @param {Object} msg\n      * @param {Object[]} msg.data - array of results per task, sent by ConsolidationWorker.\n      * \t\t\t\t\t\t\t\tEach result contains interleaved vertex-buffer and vertex-id buffer for a\n      * \t\t\t\t\t\t\t    consolidated mesh. see doGeomMerge() function in ConsolidationWorker.js for details.\n      */\n  function handleGeomMergeResult(msg) {\n\n    // get worker results. Note that sending consolidation results is currently the only supported\n    // message that a consolidation worker may send.\n    var results = msg.data;\n\n    // for each returned vertex-buffer, find the corresponding consolidated mesh that should obtain it.\n    for (var i = 0; i < results.length; i++) {\n\n      var result = results[i];\n      var taskId = result.taskId;\n\n      // use task id to find receiving geometry\n      var geom = _receiverGeoms[taskId];\n\n      applyMergeResult(result, geom);\n\n      // remove entry from list\n      delete _receiverGeoms[taskId];\n    }\n\n    // Check if all workers are done\n    _workersRunning--;\n    if (_workersRunning === 0) {\n\n      // all workers done. Signal that consolidation is ready to use.\n      _consolidation.inProgress = false;\n\n      // terminate workers\n      for (i = 0; i < _workers.length; i++) {\n        _workers[i].clearAllEventListenerWithIntercept();\n        _workers[i].terminate();\n        _workers[i] = null;\n      }\n    }\n  }\n}\n\n// Run merge task immediately in the main thread\nexport function runMergeSingleThreaded(geoms, mergedGeom, matrices, dbIds) {\n\n  var task = createMergeTask(geoms, mergedGeom, matrices, dbIds);\n\n  // run merge task\n  var vec = new Vector3();\n  var matrix = new Matrix4();\n  var result = task.run(matrix, vec);\n\n  applyMergeResult(result, mergedGeom);\n}\n\nParallelGeomMerge.createWorker = createWorkerWithIntercept;","import { isMobileDevice, getGlobal } from \"../../../compat\";\nimport { tile2Index, index2Tile, TileCoords } from './TileCoords';\nimport { SortedList } from '../SortedList';\nimport { LmvMatrix4 } from '../LmvMatrix4';\nimport { UVTransform, GeometryManager } from './TexQuadUtils';\nimport * as THREE from \"three\";\nimport { logger } from \"../../../logger/Logger\";\nimport { SceneMath } from \"../SceneMath\";\n\nvar TileState_Missing = 0;\nvar TileState_Loading = 1;\nvar TileState_Loaded = 2;\n\nvar _document = getGlobal().document;\n\nvar TileInfo = function TileInfo(timeStamps, mesh) {\n\n  this.timeStamps = timeStamps; // {number} frame timeStamp of last usage (per view) \n  this.mesh = mesh; // {THREE.Mesh}\n  this.state = TileState_Missing;\n};\n\n// @param {THREE.Vector3} camPos\n// @param {THREE.Vector3} camDir - must be normalized\n// @param {THREE.Vector3} bboxMin\n// @param {THREE.Vector3} bboxMax\n// @returns {Number} Projected z-distance of a bbox from the camera\nfunction projectedBoxDistance(camPos, camDir, boxMin, boxMax) {\n  // compute the point within bbox that is nearest to p by clamping against box\n  var nearest = camPos.clone();\n  nearest.max(boxMin);\n  nearest.min(boxMax);\n\n  return nearest.sub(camPos).dot(camDir);\n}\n\nexport function TexQuadConfig() {\n  this.urlPattern = null; // string pattern for image URLs, e.g., http://otile1.mqcdn.com/tiles/1.0.0/sat/{z}/{x}/{y}.jpg\n  this.tileSize = null; // in;  width/height of tile images (always squared) in pixels. E.g., 256\n  this.maxLevel = null; // int; maximum hierarchy level, e.g., 10    \n  this.skippedLevels = []; // Assume all levels are present\n\n  this.textureLoader = null; // user-provided function for loading images\n\n  // texture extent at max resolution. Must be integer between 1 and 2^(maxLevel)\n  this.texWidth = 0;\n  this.texHeight = 0;\n\n  // Restrict number of tiles that are forced keep in memory at once. As a minimum, we only keep in memory\n  // what we need to display the currently visible tiles. Higher values allow to spend more memory\n  // on prefetching tiles.\n  this.maxActiveTiles = isMobileDevice() ? 0 : 400;\n\n  // LRU cache size (given as max number of tiles)\n  this.cacheSize = isMobileDevice() ? 0 : 150;\n\n  // {function()} optional callback that is triggered when the root image is loaded.\n  // This is used when loading single images (maxLevel=0), where we obtain texWidth, texHeight, and tileSize\n  // are obtained from the image dimensions.\n  this.onRootLoaded = null;\n\n  // In this code, root level 0 contains is defined as the largest miplevel for which whole image fits into a single tile. The translation service\n  // currently produces additional levels with smaller mipmaps of this single tiles, which we don't use here. E.g., the actual root tile of our hierarchy\n  // might be in a folder \"9\" instead of \"0\". Therefore, whenever we do image load requests, we add this level offset to the tile level to derive the image URL.\n  this.levelOffset = 0;\n\n  this.getRootTileSize = function () {\n    // the root tile covers a squared pixel region of size tileSize * 2^maxLevel\n    return 1.0 * (this.tileSize << this.maxLevel);\n  };\n\n  this.getQuadWidth = function () {return this.scale * this.texWidth / this.getRootTileSize();};\n  this.getQuadHeight = function () {return this.scale * this.texHeight / this.getRootTileSize();};\n\n  /** @returns {LmvMatrix4} Converts from quad geometry coords to paper units. */\n  this.getPageToModelTransform = function (paperWidth, paperHeight) {\n\n    // scale from page to model units\n    var sx = paperWidth / this.getQuadWidth();\n    var sy = paperHeight / this.getQuadHeight();\n\n    return new LmvMatrix4(true).set(\n    sx, 0, 0, 0,\n    0, sy, 0, 0,\n    0, 0, 1, 0,\n    0, 0, 0, 1);\n\n  };\n\n  // The root tile corresponds to [0,1] in x/y. The actual image may be smaller.\n  this.getBBox = function () {\n\n    // the image dimensions determine which fraction of the root tile is actually used.\n    var quadWidth = this.getQuadWidth();\n    var quadHeight = this.getQuadHeight();\n\n    if (this.fitPaperSize) {\n      return new THREE.Box3(new THREE.Vector3(), new THREE.Vector3(quadWidth, quadHeight, 0.0));\n    } else {\n      // If quadHeight is <1.0, it means that not the full root tile height is used by the image.\n      // Since pixel y and worldY directions are opposite, the unused part of the [0,1] region is at \n      // the lower end of the y-range. \n      var cropYShift = 1.0 - quadHeight;\n      return new THREE.Box3(new THREE.Vector3(0, cropYShift, 0), new THREE.Vector3(quadWidth, 1.0, 0.0));\n    }\n  };\n\n  this.valid = function () {\n    return typeof this.urlPattern == 'string' && this.urlPattern.length > 0 &&\n    typeof this.tileSize == 'number' && this.tileSize > 0 &&\n    typeof this.maxLevel == 'number' && this.maxLevel > 0 &&\n    typeof this.texWidth == 'number' && this.texWidth > 0 &&\n    typeof this.texHeight == 'number' && this.texHeight > 0;\n  };\n\n  /** Configures the iterator to display a single image file without leaflet hierarchy.\n      *  For this case, the image dimensions are not known in advance, but set as soon as \n      *  the root tile is loaded. \n      *   @params {string}     imagePath\n      *   @params {function()} [onImageLoaded] Called as soon as the root has been loaded and \n      *                        the image dimensions are available.\n      */\n  this.initForSimpleImage = function (imagePath) {\n\n    // The urlPattern read from bubble may have been URL encoded.\n    // This can happen if the bubble comes from EMEA data center.\n    this.urlPattern = decodeURIComponent(imagePath);\n    this.maxLevel = 0;\n    this.levelOffset = 0;\n\n    this.scale = 1.0;\n\n    // indicate that these values are not available yet.\n    // The iterator will set them based on the image extensions as soon as it is loaded\n    this.tileSize = -1;\n    this.texWidth = -1;\n    this.texHeight = -1;\n\n    this.isSimpleImage = true;\n  };\n\n  this.isLevelPresent = function (level) {\n    return !this.skippedLevels[level];\n  };\n\n  // Returns the required maxLevel for a given texture resolution.\n  // All params are int.\n  function computeMaxLevel(w, h, tileSize) {\n\n    // compute maxLevel that we would get for 1x1 resolution at level 0\n    var lx = Math.ceil(Math.log2(w));\n    var ly = Math.ceil(Math.log2(h));\n    var maxLevel = Math.max(lx, ly);\n\n    // since the actual root tile has tileSize x tileSize, we subtract the skipped levels.\n    return maxLevel - Math.log2(tileSize);\n  }\n\n  // If a maxLevel is specified that is smaller than the one that we computed for the given\n  // resolution, texWidth and texHeight must be set to the smaller resolution at this level.\n  function applyMaxLevel(config, actualMaxLevel, restrictedMaxLevel) {\n    // Find the next lower level that hasn't been skipped.\n    while (restrictedMaxLevel > 0 && config.skippedLevels[restrictedMaxLevel]) {\n      --restrictedMaxLevel;}\n    var levelDiff = actualMaxLevel - restrictedMaxLevel;\n    if (levelDiff > 0) {\n      config.texWidth >>= levelDiff;\n      config.texHeight >>= levelDiff;\n      config.maxLevel = restrictedMaxLevel;\n    }\n  }\n\n  // Find the levels that are really present in the zip file\n  function findSkippedLevels(config) {\n    var skipped = [];\n    if (config.zips) {\n      // We will match the url exactly, except allow numbers for {x} {y} {z}\n      // First make sure the url is properly escaped for regex.        \n      exp = config.urlPattern.replace(/[-\\/\\\\^$*+?.()|[\\]{}]/g, '\\\\$&');\n      // Now match {x} and {y} with a number\n      exp = exp.replace(/\\\\{x\\\\}/, '[0-9]+');\n      exp = exp.replace(/\\\\{y\\\\}/, '[0-9]+');\n      // Now match {z} with a number and capture it\n      exp = exp.replace(/\\\\{z\\\\}/, '([0-9]+)');\n      // Now create the regex that completely matches exp\n      var exp = new RegExp('^' + exp + '$');\n\n      // Initialize the skipped levels. Assume no levels are present\n      skipped.length = config.maxLevel + 1;\n      skipped.fill(true);\n\n      var present = 0; // Count the number of levels present\n\n      // Search the zip file tables for matching files\n      config.zips.forEach(function (curZip) {\n        Object.keys(curZip.fileTable).forEach(function (key) {\n          var match = exp.exec(key);\n          // If we got a match, then process it\n          if (match && match[1]) {\n            var index = parseInt(match[1]) - config.levelOffset;\n            // make sure the match is within the range we want\n            if (index >= 0 && index <= config.maxLevel) {\n              skipped[index] = false;\n              ++present;\n            }\n          }\n        });\n      });\n\n      if (present === 0) {\n        skipped.length = 0;\n        logger.info('No leaflet levels found - assume all are present');\n      }\n    }\n    return skipped;\n  }\n\n  /** Extracts all required params from a given options dictionary.\n     * @param {string} urlPattern\n     * @param {Object} options Parameter dictionary\n     * @param {function} textureLoader User-provided function for loading image resources.\n     *   The function has the following signature: function(imageURL, onSuccess, onError).\n     *   In case of success, `onSuccess` callback should be called with the texture as a single argument.\n     *   In case of failure, `onError` callback should be called with a description of the error.\n     */\n  this.initFromLoadOptions = function (urlPattern, options, textureLoader) {\n\n    // The urlPattern read from bubble may have been URL encoded.\n    // This can happen if the bubble comes from EMEA data center.\n    this.urlPattern = decodeURIComponent(urlPattern);\n    this.textureLoader = textureLoader;\n\n    if (options) {\n      this.tileSize = options.tileSize;\n      this.maxLevel = computeMaxLevel(options.texWidth, options.texHeight, options.tileSize);\n      this.texWidth = options.texWidth;\n      this.texHeight = options.texHeight;\n      this.levelOffset = options.levelOffset;\n      this.zips = options.zips;\n\n      this.fitPaperSize = options.fitPaperSize;\n      this.paperHeight = options.paperHeight;\n      this.scale = this.fitPaperSize ? options.paperWidth * this.getRootTileSize() / this.texWidth : 1.0;\n\n      this.skippedLevels = findSkippedLevels(this);\n\n      // If maxLevel is specified, scale down texSize to the resolution at this level\n      if (typeof options.maxLevel == 'number') {\n        applyMaxLevel(this, this.maxLevel, options.maxLevel);\n      }\n\n      // allow to override default memory settings via load options\n      this.maxActiveTiles = options.maxActiveTiles || this.maxActiveTiles;\n      this.cacheSize = options.cacheSize || this.cacheSize;\n    }\n  };\n}\n\n/** @classDesc Produces a quad that is textured with a large image. \n   *             The image is stored as a hierarchy of image tiles, where each tile is stored as a separate file (e.g. jpg or png).\n   *             Each hierarchy level represents a miplevel of the overall texture, subdivided into squared tiles \n   *             of fixed size (e.g., 256 x 256). Level 0 contains a single tile that represents the whole texture as a single tile at lowest resolution.\n   *             At the leaf level n, the texture is represented at full resolution as a tile grid of up to (2^n x 2^n) tiles. \n   *\n   *             Note that some tiles may be unused or cropped if the overall resolution is not squared and a pow2-multiple of the tilesize.\n   *             \n   * @class \n   *   @param {TexQuadConfig}   config\n   *   @param {MaterialManager} materials\n   */\nexport function ModelIteratorTexQuad(config, materials) {\n\n  //Set this in order to avoid a hard dependency to this class from RenderModel's getLeaflet() function.\n  this.isModelIteratorTexQuad = true;\n\n  var _config = config;\n\n  var _dpiScale = 1; // In case of comparison between files with different dpi's\n\n  // The bbox of the quad keeps the same, because it is independent on how we subdivide the quad geometry.\n  // However, for single images, its correct initialization will be deferred until the image is loaded.\n  var _bbox = config.getBBox();\n\n  // reused scene (per view) that we reconfigure on each iterator reset.\n  var _scenes = [];\n\n  // For setting a model transform\n  var _matrix = null,_invMatrix = null;\n  var _matrixWithoutScale = new THREE.Matrix4();\n  var _invMatrixWithoutScale = new THREE.Matrix4();\n  var _identity = new THREE.Matrix4();\n  var _pos = new THREE.Vector3();\n  var _rotate = new THREE.Quaternion();\n  var _scale = new THREE.Vector3();\n  var _scaleX = 1;\n  var _scaleY = 1;\n  var _transformedCamera; // Placeholder camera to avoid creating a new one\n\n  // To support theming\n  var _defaultTheming = new THREE.Vector4(0, 0, 0, 0);\n  var _themingColor = new THREE.Vector4().copy(_defaultTheming);\n\n  // For selection\n  var _modelId = 0;\n\n  // {MaterialManager}\n  var _materials = materials;\n\n  // This iterator returns only a single scene. Therefore, _done is set to false when on iteration start (this.reset()) \n  // and set to true again after first call of nextBatch. \n  var _done = []; // bool per view index\n\n  // array of TileInfos for all tiles that are currently available for rendering.\n  // caching of generated tiles. Tiles are addressed by int indices\n  // computed by tile2Index (see TileCoords.js)\n  var _tiles = [];\n\n  // increased with each iterator reset. used for LRU timestamps.\n  var _timeStamps = []; // managed separately per viewer\n\n  // Allocates a separate view, for which reset/getScene can be called independently.\n  // Make sure to call unregister when not using anymore - to avoid leaking resources.\n  // @returns {number} index of the new view. \n  this.registerView = function () {\n    // find first free view index\n    var viewIndex = _scenes.indexOf(undefined);\n    if (viewIndex === -1) {\n      viewIndex = _scenes.length;\n    }\n\n    // acquire new scene and timestamp\n    var scene = new THREE.Scene();\n    // matrix will contain the placement transform (much like in FragmentList), while\n    // matrixWorld will contain the combination of this placement and the model transform that\n    // is applied when aligning models\n    if (_config.placementTransform) {\n      scene.matrix.copy(_config.placementTransform);\n    }\n    scene.matrixAutoUpdate = false;\n    _scenes[viewIndex] = scene;\n    _timeStamps[viewIndex] = 0;\n    _done[viewIndex] = true;\n\n    return viewIndex;\n  };\n\n  // Default view 0 is always registered\n  this.registerView();\n\n  // for each update cycle, we track the number of tiles for which we updated the timeStamp.\n  // The purpose of this is to control the memory consumption, because all active tiles are\n  // kept in memory and protected from cache cleanup.\n  var _numActiveTiles = 0;\n\n  // used to limit the number of simultaneously loaded tiles\n  var _maxRequests = 5;\n  var _numRequests = 0; // currently running requests\n\n  // For each frame, limit the number of new textures that enter the scene.\n  // Otherwise, texture decode/upload in FireFlyRenderer may take too long.\n  var _maxTextureUpdatesPerFrame = 5;\n\n  // used to trigger redraw when new tiles are loaded\n  var _needsRedraw = false;\n\n  // each callback is called once when the scene is fully refined.\n  var _onRefinedCallbacks = [];\n\n  // Shared THREE.Geometry. A unit quad in xy plane with uv coords. Used for all tiles.\n  var _quadGeom = null;\n\n  var _aggressivePrefetching = false;\n\n  var gm = new GeometryManager();\n\n  // get image resolution at a given hierarchy level. We have full resolution at maxLevel and reduce it by half with each level.\n  function getMipmapWidth(level) {\n    var levelDiff = _config.maxLevel - level;\n    return _config.texWidth >> levelDiff;\n  }\n  function getMipmapHeight(level) {\n    var levelDiff = _config.maxLevel - level;\n    return _config.texHeight >> levelDiff;\n  }\n\n  // returns true if the pixel region of the tile is outside the given image dimensions.\n  //  @param {TileCoords} tile\n  //  @returns {bool}\n  function tileOutside(tile) {\n    // get dimensions\n    var levelWidth = getMipmapWidth(tile.level);\n    var levelHeight = getMipmapHeight(tile.level);\n\n    // compute minPixel of the tile's pixel region\n    var minPixelX = tile.x * _config.tileSize;\n    var minPixelY = tile.y * _config.tileSize;\n\n    return minPixelX >= levelWidth || minPixelY >= levelHeight;\n  }\n\n  // The width/height of a mipLevel cannot be assumed to be a multiple of tileSize. Therefore, tiles containing the image boundary \n  // are cropped to the relevant pixels. E.g., the width of a boundary tile might be 500 while the tileSize is 512.\n  // Since the image is cropped, we have to scale down the geometry as well to avoid stretching. This function contains the scale\n  // factor in x/y to be applied to the geometry.\n  //\n  // @returns {THREE.Vector2} \n  function getCropScale(tile) {\n    // get dimensions\n    var levelWidth = getMipmapWidth(tile.level);\n    var levelHeight = getMipmapHeight(tile.level);\n\n    // compute first minPixel covered by this tile\n    var minPixelX = tile.x * _config.tileSize;\n    var minPixelY = tile.y * _config.tileSize;\n\n    // crop tile to image dimensions\n    var croppedWidth = Math.max(0, Math.min(_config.tileSize, levelWidth - minPixelX));\n    var croppedHeight = Math.max(0, Math.min(_config.tileSize, levelHeight - minPixelY));\n\n    var ts = 1.0 * _config.tileSize;\n\n    return new THREE.Vector2(croppedWidth / ts, croppedHeight / ts);\n  }\n\n  /**\n     * Sets aggressive prefetching mode. When enabled more tiles will be retrieved on each reset.\n     * @param {boolean} enable\n     */\n  this.setAggressivePrefetching = function (enable) {\n    _aggressivePrefetching = enable;\n  };\n\n  this.getScene = function (viewIndex) {\n    viewIndex = viewIndex || 0;\n    return _scenes[viewIndex];\n  };\n\n  this.getModelMatrix = function () {\n    return _matrix;\n  };\n\n  this.getInverseModelMatrix = function () {\n    if (_matrix) {\n      if (!_invMatrix) {\n        _invMatrix = new THREE.Matrix4().getInverse(_matrix);\n      }\n\n      return _invMatrix;\n    }\n\n    return null;\n  };\n\n  this.setModelMatrix = function (matrix) {\n    if (matrix) {\n      _matrix = _matrix || new THREE.Matrix4();\n      _matrix.copy(matrix);\n    } else {\n      _matrix = null;\n    }\n    _invMatrix = null;\n  };\n\n  /** @returns {THREE.Scene|null} */\n  this.nextBatch = function (viewIndex) {\n\n    viewIndex = viewIndex || 0;\n\n    // first call since reset => return _scene \n    if (!_done[viewIndex]) {\n      _done[viewIndex] = true;\n      return _scenes[0];\n    }\n    return null;\n  };\n\n  this.getSceneCount = function () {\n    // TexQuadIterators are always rendered as a single batch\n    return 1;\n  };\n\n  /** @returns {bool} */\n  this.done = function (viewIndex) {return _done[viewIndex || 0];};\n\n  /** Perform raycast on the quad. \n                                                                      * @param {THREE.RayCaster} raycaster\n                                                                      * @param {Object[]}        intersects - An object array that contains intersection result objects.\n                                                                      *                                       Each result r stores properties like r.point, r.fragId, r.dbId. (see VBIntersector.js for details)\n                                                                      */\n  this.rayCast = function (raycaster, intersects) {\n\n    // not implemented yet\n    return null;\n  };\n\n  /** Copies visible bbox into the given output params. Since per-fragment visibility is not supported\n      *  by this iterator, both bboxes are always identical.\n      *\n      *   @param {THREE.Box3} [visibleBounds]\n      *   @param {THREE.Box3} [visibleBoundsWithHidden]\n      */\n  this.getVisibleBounds = function (visibleBounds, visibleBoundsWithHidden) {\n    if (visibleBounds) {\n      visibleBounds.copy(_bbox);\n      _matrix && visibleBounds.applyMatrix4(_matrix);\n    }\n    if (visibleBoundsWithHidden) {\n      visibleBoundsWithHidden.copy(_bbox);\n      _matrix && visibleBoundsWithHidden.applyMatrix4(_matrix);\n    }\n  };\n\n  // compute width/height of a tile, assuming that the root corresponds to [0,1]^2 in xy.\n  // level is int.\n  function getTileScale(level) {return _config.scale / (1 << level);}\n\n  // Given a tile to be rendered and a (n-th-order) parent from which we use the material,\n  // this method computes offset and scale in uv coords that we need to compute the texture coords.\n  //  @returns {UVTransform}\n  function getUVOffsetAndScale(tile, parentTile) {\n\n    // compute the level difference between tile and parent\n    var levelDiff = tile.level - parentTile.level;\n\n    // at tile.level, compute the number of tiles in x and y that share the same parent tile\n    var levelDiffScale = 1 << levelDiff;\n\n    // compute width/height in uv-space\n    var uvScaleX = 1.0 / levelDiffScale;\n    var uvScaleY = uvScaleX;\n\n    // uvScale means here: \"which extent in the uv-space of the parent corresponds to a the size of a single tile at tile.level\"\n    // If the parent tile is cropped, the uvScale needs to be upscaled accordingly.        \n    var parentCropScale = getCropScale(parentTile);\n    uvScaleX /= parentCropScale.x; // Note that cropScale.x and cropScale.y are always >0. Otherwise, the whole parent tile would \n    uvScaleY /= parentCropScale.y; // be outside the image extent and it wouldn't make sense to compute any uv coords.\n\n    // For l=tile.level, find the minimum x and y among all subtiles of parent at level l.\n    var firstX = parentTile.x * levelDiffScale;\n    var firstY = parentTile.y * levelDiffScale;\n\n    // compute offsetX/Y within the subtile grid of size [levelDiffScale]^2\n    var offsetX = tile.x - firstX;\n    var offsetY = tile.y - firstY;\n\n    // uvScale as computed above is the size of a full tile at tile.level, given in uv space of the parent.\n    // If the (child) tile is cropped, its geometry will be cropped as well, so that its extent is less than a full tile\n    // at this level. Therefore, we have to consider the cropScale of the tile for the final scale factor.\n    var cropScale = getCropScale(tile);\n\n    // transform offset from tile-grid to uv\n    offsetX *= uvScaleX;\n    offsetY *= uvScaleY;\n\n    // apply y-flip. Note that a simple y-flip (1.0-val) swaps min/max v-value of the tile.\n    // E.g., the uv-offset of the first tile would be 1.0 after the swap - which should actually \n    // the max-v of the tile. Since offset has to be the min-uv, we have to subtract the\n    // v-extent of the tile afterwards.\n    offsetY = 1.0 - offsetY - uvScaleY * cropScale.y;\n\n    var result = new UVTransform();\n    result.offsetX = offsetX;\n    result.offsetY = offsetY;\n    result.scaleX = uvScaleX * cropScale.x;\n    result.scaleY = uvScaleY * cropScale.y;\n    return result;\n  }\n\n  // tile: TileCoords\n  // Returns: float\n  function getTileMinX(tile) {\n    var tileScale = getTileScale(tile.level);\n\n    return tileScale * tile.x * _dpiScale;\n  }\n\n  // see getTileMinX\n  function getTileMinY(tile) {\n    var tileScale = getTileScale(tile.level);\n    var top = _config.fitPaperSize ? _config.paperHeight : 1.0;\n    return top - (tile.y + 1) * tileScale * _dpiScale;\n  }\n\n  // @returns {TileInfo|null}\n  function getTileInfo(tile) {\n    return _tiles[tile2Index(tile)];\n  }\n\n  // Returns a true if a tile texture is in memory\n  function tileLoaded(tile) {\n    var tileInfo = getTileInfo(tile);\n    return tileInfo instanceof TileInfo && tileInfo.state === TileState_Loaded;\n  }\n\n  // Finds a parent tile for which a texture is a available\n  // Takes and returns TileCoord (or null if nothing found)\n  //  @param {bool} [disableNewTextures] if true, we enforce to use a texture that\n  //                                     has been used before and doesn't need to be decoded/uloaded anymore.\n  function findLoadedParent(tile, disableNewTextures) {\n\n    // step up the parent path until we find one in memory\n    var parent = tile.getParent();\n    while (parent) {\n      var info = getTileInfo(parent);\n\n      // tile loaded?\n      var found = info && info.state === TileState_Loaded;\n\n      // if loaded, are we allowed to use the texture?\n      if (found && disableNewTextures) {\n\n        // don't allow adding new tiles. Just the root is always accepted.\n        if (info.mesh.material.map.needsUpdate && parent.level > 0) {\n          found = false;\n        }\n      }\n\n      // stop if we found a usable parent\n      if (found) {\n        break;\n      }\n\n      // Continue with next parent. Latest at the root,\n      // we will usually succeed.\n      parent = parent.getParent();\n    }\n\n    return parent;\n  }\n\n  // creates a single quad shape (THREE.Mesh) representing a tile of the image.\n  // If no image is provided, we use the material of a lower-resolution tile.\n  function createTileShape(\n  tile, // TileCoords\n  material, // THREE.Material\n  disableNewTextures // If material is null, this optional flag enforces that\n  // we use a fallback texture that does not require decode/upload\n  ) {\n    var geom;\n    // for tiles with own texture, we can use the shared quad shape\n    if (material) {\n      // create shared quad geom on first use\n      if (!_quadGeom) {\n        _quadGeom = gm.createQuadGeom();\n      }\n\n      geom = _quadGeom;\n\n    } else {\n      // share texture of lower-resolution tile\n\n      // if we have no image, find a parent tile from which we can reuse the material as a fallback\n      var parentTile = findLoadedParent(tile);\n\n      // by construction, parent is the first parent with texture \n      // in memory. So, parentShape must always be available.            \n      var parentShape = getTileShape(parentTile);\n\n      material = parentShape.material;\n\n      // configure uv transform, because we are only using a subset of \n      // the texture for this tile\n      var tmp = getUVOffsetAndScale(tile, parentTile);\n\n      geom = gm.acquireQuadGeom(tmp);\n    }\n\n    var mesh = new THREE.Mesh(geom, material);\n    mesh.tile = tile;\n    mesh.modelId = _modelId;\n    mesh.themingColor = _themingColor;\n\n    var tileScale = getTileScale(tile.level);\n\n    // for boundary tiles with cropped images, scale down geometry accordingly. No effect for non-cropped tiles.\n    var cropScaleFactor = getCropScale(tile);\n\n    // since pixel y and worldY directions are opposite, y-cropped tiles also needs to be shifted.\n    var cropYShift = (1.0 - cropScaleFactor.y) * tileScale * _dpiScale;\n\n    // compute offset and scale of the tile, where [0,1]^2 corresponds to the root\n    var tileOffsetX = getTileMinX(tile);\n    var tileOffsetY = getTileMinY(tile);\n    mesh.position.set(tileOffsetX, tileOffsetY + cropYShift, 0.0);\n    mesh.scale.set(tileScale * cropScaleFactor.x * _dpiScale, tileScale * cropScaleFactor.y * _dpiScale, 1.0);\n\n    return mesh;\n  }\n\n  // Returns the URL string to request a single tile image\n  function getTileTextureURL(tile) {\n\n    var levelOffset = _config.levelOffset ? _config.levelOffset : 0;\n\n    var url = _config.urlPattern.\n    replace(\"{x}\", tile.x).\n    replace(\"{y}\", tile.y).\n    replace(\"{z}\", tile.level + levelOffset);\n    return url;\n  }\n\n  var resizeToPow2 = function resizeToPow2(tex) {\n    var image = tex.image;\n    // First figure out what size we need and whether it is OK.\n    var w = 1;while ((w *= 2) < image.width) {;}\n    var h = 1;while ((h *= 2) < image.height) {;}\n    if (w === image.width && h === image.height)\n    return;\n\n    // Need to resize. We resize by placing the image at the top left;\n    // extending the edges to the edge of the new size; and\n    // adjusting the texture transform to compensate for the new texture size.\n    var canvas = _document.createElement('canvas');\n    canvas.width = w;\n    canvas.height = h;\n    var context = canvas.getContext(\"2d\");\n    context.drawImage(image, 0, 0);\n    var data = context.getImageData(0, 0, w, h);\n    var array = new Uint32Array(data.data.buffer, 0, w * h);\n\n    var i, j;\n    if (image.height < h) {\n      // first extend on the bottom side\n      var bottom = image.height * w;\n      for (i = image.height; i < h; ++i, bottom += w) {\n        for (j = 0; j < image.width; ++j) {\n          array[bottom + j] = array[bottom + j - w];\n        }\n      }\n    }\n\n    if (image.width < w) {\n      // Next along the right side\n      var right = 0;\n      for (i = 0; i < h; ++i, right += w) {\n        for (j = image.width; j < w; ++j) {\n          array[right + j] = array[right + j - 1];\n        }\n      }\n    }\n\n    // Put the image back\n    context.putImageData(data, 0, 0);\n\n    tex.image = canvas;\n    if (tex.flipY) {\n      tex.offset.set(0, 1 - image.height / h);\n    }\n    tex.repeat.set(image.width / w, image.height / h);\n  };\n\n  var _this = this;\n\n  // As soon as a tile is loaded, it will be available via getTileShape(tile).\n  function requestTile(tile) {\n\n    // get tileInfo\n    var tileIndex = tile2Index(tile);\n    var tileInfo = _tiles[tileIndex];\n\n    // if tile is already loading or in memory, do nothing\n    if (tileInfo && tileInfo.state !== TileState_Missing) {\n      return;\n    }\n\n    // make sure that tileInfo exists\n    if (!tileInfo) {\n      tileInfo = new TileInfo(_timeStamps.slice());\n      _tiles[tileIndex] = tileInfo;\n    }\n\n    // mark tile as loading, so that we don't request it again\n    tileInfo.state = TileState_Loading;\n\n    var path = getTileTextureURL(tile);\n\n    // Callback that updates the tile-shape as soon as the texture is loaded\n    var onTexLoaded = function onTexLoaded(tex) {// tex = THREE.Texture.\n\n      // drop texture if the iterator has been deleted meanwhile\n      if (!_this || !tex) {\n        return;\n      }\n\n      // when using the iterator for displaying a single image, we get texWidth/texHeihgt/tileSize\n      // from the actual image dimensions.\n      if (_config.maxLevel === 0) {\n        if (_config.texWidth === -1) _config.texWidth = tex.image.width;\n        if (_config.texHeight === -1) _config.texHeight = tex.image.height;\n        if (_config.tileSize === -1) _config.tileSize = Math.max(tex.image.width, tex.image.height);\n\n        // update bbox - which depends on texture dimensions\n        _bbox = config.getBBox();\n      }\n\n      // Make the texture a power of 2 so we can use mipmaps\n      resizeToPow2(tex);\n\n      // use linear filter, so that we can use non-pow2 textures.\n      tex.minFilter = THREE.LinearMipMapLinearFilter;\n      tex.magFilter = THREE.LinearFilter;\n      // Use anisotropic filtering to avoid blurry textures when looking at an angle\n      // Cap to 4 to avoid any possible performance issues.\n      tex.anisotropy = Math.min(4, Math.max(_config.maxAnisotropy, 1));\n\n      // create material\n      var material = new THREE.MeshBasicMaterial({ side: THREE.DoubleSide });\n      material.map = tex;\n\n      material.tile = tile;\n\n      // By default, MaterialManager assigns the environment texture for reflection to all\n      // materials that support it. Setting this flag avoids this.\n      material.disableEnvMap = true;\n\n      // Activate transparency for PNG images - which might make use of the alpha channel.\n      // This is the same heuristic as we apply for F2D/SVF materials (see MaterialManager.addMaterial)\n      if (path.toLowerCase().indexOf(\".png\") !== -1) {\n        material.transparent = true;\n        material.alphaTest = 0.01;\n      }\n\n      // create tile mesh\n      var mesh = createTileShape(tile, material, false);\n\n      // make new tile available\n      tileInfo.mesh = mesh;\n\n      // mark tile as loaded, so that we know that its own texture is in memory.\n      tileInfo.state = TileState_Loaded;\n\n      // request finished\n      _numRequests--;\n\n      // trigger scene update\n      _needsRedraw = true;\n\n      // we take care of caching ourselves. To keep consumed memory under control, make sure\n      // that no texture is left behind in THREE's internal loader cache\n      // Note that we cannot always use 'path' here, because the final image url might differ due\n      // to additional credential stuff.\n      var texUrl = tex && tex.image ? tex.image.src : null;\n      if (texUrl && THREE.Cache && THREE.Cache.get(texUrl)) {\n        THREE.Cache.remove(texUrl);\n      }\n\n      // trigger custom callback when root is available\n      if (tile.level === 0 && _config.onRootLoaded) {\n        _modelId = _config.onRootLoaded();\n      }\n\n      mesh.themingColor = _themingColor; // By sharing the color object, we can change all the meshes at once.\n      mesh.modelId = _modelId; // Update here since the value from createTileShape won't be the correct one\n\n      // Set material name that we use to find and unregister\n      // this material in MaterialManager later\n      material.name = \"model:\".concat(_modelId, \"|\").concat(path);\n      // add material to material manager to make sure that the shader is\n      // correctly configured. E.g., to configure in which render targets to write etc.\n      _materials.addMaterial(material.name, material, true);\n    };\n\n    // track number of open requests\n    _numRequests++;\n\n    // load tile texture\n    _config.textureLoader(path, function (texture, error) {\n      onTexLoaded(texture);\n    }, function (err) {\n      _config.onDone(err, null);\n      console.error(err);\n    });\n  }\n\n  this.requestRootTile = function () {\n    requestTile(new TileCoords(0, 0, 0));\n  };\n\n  // returns a tile shape from memory cache. Returns null if the tile's own\n  // texture is not loaded yet.\n  function getTileShape(tile) {\n\n    var index = tile2Index(tile);\n    var tileInfo = _tiles[index];\n\n    if (!tileInfo || tileInfo.state !== TileState_Loaded) {\n      return null;\n    }\n\n    return tileInfo.mesh;\n  }\n\n  // tile:   TileCoords\n  // outMin: Vector3 (z=0.0)\n  function getTileMin(tile, outMin) {\n    // Apply scale here and not in getTileMinX/Y because that one's used for the mesh creation as well\n    var x = getTileMinX(tile) * _scaleX;\n    var y = getTileMinY(tile) * _scaleY;\n    outMin.set(x, y, 0);\n  }\n\n  function getTileMax(tile, outMax) {\n    var scale = getTileScale(tile.level);\n    // Apply scale here and not in getTileMinX/Y because that one's used for the mesh creation as well\n    var x = (getTileMinX(tile) + scale) * _scaleX;\n    var y = (getTileMinY(tile) + scale) * _scaleY;\n    outMax.set(x, y, 0);\n  }\n\n  // Returns true if a tile intersects the view frustum\n  var tileInFrustum = function () {\n    var tileMin = new THREE.Vector3();\n    var tileMax = new THREE.Vector3();\n    var tileBox = new THREE.Box3();\n\n    return function (\n    tile, // {TileCoords}\n    frustum // {FrustumIntersector}\n    ) {\n      // get tile box\n      getTileMin(tile, tileMin);\n      getTileMax(tile, tileMax);\n\n      tileBox.set(tileMin, tileMax);\n\n      return frustum.intersectsBox(tileBox) > 0;\n    };\n  }();\n\n  // Computes the priority of a tile based on camera distance and tile size.\n  var computeTilePriority = function () {\n    var tileMin = new THREE.Vector3();\n    var tileMax = new THREE.Vector3();\n\n    return function (\n    tile, // {TileCoords}\n    frustum, // {FrustumIntersector}\n    camPos // {THREE.Vector3}\n    ) {\n      // compute xy-distance from camera\n      var tileScale = getTileScale(tile.level);\n      getTileMin(tile, tileMin);\n      getTileMax(tile, tileMax);\n      var dist2 = SceneMath.pointToMinMaxBoxDistance2(camPos, tileMin, tileMax);\n\n      // scale-up priority for visible tiles\n      var tileVisible = tileInFrustum(tile, frustum);\n      var frustumFactor = tileVisible ? 100.0 : 1.0;\n\n      // avoid division by zero: for tiles below this distance, \n      // we only distinguish based on tile level\n      var MinDist2 = 0.0001;\n      dist2 = Math.max(dist2, MinDist2);\n\n      // squared tile size\n      var tileScale2 = tileScale * tileScale;\n\n      // Priority = tileSize/dist \n      var priority = frustumFactor * tileScale2 / dist2;\n\n      return priority;\n    };\n  }();\n\n  // Estimates for a tile the current screen size in pixels \n  var estimateScreenSize = function () {\n    var tileMin = new THREE.Vector3();\n    var tileMax = new THREE.Vector3();\n\n    return function (\n    tile, // {TileCoords}\n    camera, // {UnifiedCamera}\n    camDir // {THREE.Vector3}\n    ) {\n      getTileMin(tile, tileMin);\n      getTileMax(tile, tileMax);\n      // Find shortest distance from camera to tile (along the camera direction)\n      var dist = Math.abs(projectedBoxDistance(camera.position, camDir, tileMin, tileMax));\n      // Find the pixels per unit at that distance (measured in physical device pixels)\n      var pixelRatio = _config.getPixelRatio();\n      var pixelsPerUnit = camera.pixelsPerUnitAtDistance(dist) * pixelRatio;\n      // Calculate the edge length in world units (doesn't matter which since it's a square)\n      var edgeLength = tileMax.y - tileMin.y;\n\n      // Return the edge length in pixels\n      return edgeLength * pixelsPerUnit;\n    };\n  }();\n\n  // helper struct used to order tiles based on refinement priority\n  function Candidate(tile, prio) {\n    this.tile = tile;\n    this.prio = prio;\n  }\n\n  // compare op to sort candidates by decreasing priority\n  function moreImportant(c1, c2) {\n    return c1.prio > c2.prio;\n  }\n\n  // Updates the timeStamp of the tile to the latest value.\n  // If the tile is unknown, it has no effect.\n  function updateTimeStamp(tile, viewIndex) {\n    var tileInfo = _tiles[tile2Index(tile)];\n    if (tileInfo) {\n      if (tileInfo.timeStamps[viewIndex] !== _timeStamps[viewIndex]) {\n        tileInfo.timeStamps[viewIndex] = _timeStamps[viewIndex];\n\n        // track number of tiles for which we updated the\n        _numActiveTiles++;\n      }\n    }\n  }\n\n  // Given a list of required tiles, this method determines the most\n  // important ones and triggers as many requests as simultaneously allowed.\n  // Returns the number of newly sent requests\n  function requestTiles(tiles, frustum, camPos) {\n\n    // sort by decreasing priority\n    tiles.sort(function (a, b) {\n      var pa = computeTilePriority(a, frustum, camPos);\n      var pb = computeTilePriority(b, frustum, camPos);\n      return pb - pa;\n    });\n\n    // send as many requests as simultaneously allowed\n    var newRequests = 0;\n    for (var i = 0; i < tiles.length; i++) {\n\n      // skip tiles for which there is already a running request\n      var tileInfo = getTileInfo(tiles[i]);\n      if (tileInfo && tileInfo.state === TileState_Loading) {\n        continue;\n      }\n\n      // wait for some requests to finish before we request more\n      if (_numRequests >= _maxRequests) {\n        break;\n      }\n\n      requestTile(tiles[i]);\n\n      newRequests++;\n    }\n    return newRequests;\n  }\n\n  function disposeMaterial(tileInfo) {\n    // nothing to do if there is no material\n    if (!tileInfo || !tileInfo.mesh || !tileInfo.mesh.material) {\n      return;\n    }\n\n    // don't leak material in MaterialManager\n    var mat = tileInfo.mesh.material;\n    _materials.removeMaterial(mat.name);\n\n    // free GPU resource. We need the memory right now and should\n    // not wait for the garbage collector.\n    mat.map.dispose();\n    mat.map.needsUpdate = true;\n\n    // dispose shader program etc.\n    var DISPOSE_EVENT = { type: 'dispose' };\n    mat.dispatchEvent(DISPOSE_EVENT);\n    mat.needsUpdate = true;\n  }\n\n  /** Unregister all material from material texture and disposes textures. \n        Must be called when removing a RenderModel with this iterator.\n     */\n  this.dispose = function () {\n    var i;\n    for (i in _tiles) {\n      disposeMaterial(_tiles[i]);\n    }\n\n    if (_quadGeom) {\n      _quadGeom.dispose();\n      _quadGeom.needsUpdate = true;\n    }\n\n    gm.dispose();\n  };\n\n  this.dtor = function () {\n    this.dispose();\n\n    // ignore any remaining textureLoad callbacks\n    _this = null;\n\n    // unref MaterialManager right now in case we are the last one holding it.\n    _materials = null;\n  };\n\n  // check if tile is being used by any active view\n  function tileInUse(tileInfo) {\n    for (var i = 0; i < _timeStamps.length; i++) {\n      var viewValid = !!_scenes[i];\n      if (viewValid && tileInfo.timeStamps[i] === _timeStamps[i]) {\n        return true;\n      }\n    }\n    return false;\n  }\n\n  // Delete tiles cached from previous frames to give space for new ones without\n  // exceeding the maximum cache size.\n  //\n  //  @param {number}             requiredFreeSlots \n  //  @param {FrustumIntersector} frustum\n  //  @param {THREE.Vector3}      camPos\n  function cacheCleanup(requiredFreeSlots, frustum, camPos) {\n\n    // collect indices of all tiles in memory\n    var tileIndices = Object.keys(_tiles);\n\n    // check how many free slots we have already\n    var numTilesInMemory = tileIndices.length;\n    var availableSlots = _config.cacheSize - numTilesInMemory;\n    var missingSlots = requiredFreeSlots - availableSlots;\n\n    if (missingSlots <= 0) {\n      // No need to delete any tile from cache\n      return;\n    }\n\n    // sort by increasing timeStamp and tile priority\n    tileIndices.sort(function (a, b) {\n\n      // compare based on timeStamps\n      // NOTE: LRU caching is currently only applied for the main view.\n      //       For other views, we just protect the tiles in use.\n      var tsa = _tiles[a].timeStamps[0];\n      var tsb = _tiles[b].timeStamps[0];\n      if (tsa !== tsb) return tsa - tsb;\n\n      // if timeStamps are equal, use priorites instead\n      var tileA = index2Tile(a);\n      var tileB = index2Tile(b);\n      var prioA = computeTilePriority(tileA, frustum, camPos);\n      var prioB = computeTilePriority(tileB, frustum, camPos);\n      return prioA - prioB;\n    });\n\n    // delete tiles \n    var tilesToDelete = Math.min(missingSlots, tileIndices.length);\n    for (var i = 0; i < tilesToDelete; i++) {\n      var index = tileIndices[i];\n\n      // protect root tile from being deleted\n      var tileCoords = index2Tile(index);\n      if (tileCoords.level === 0) {\n        continue;\n      }\n\n      var tileInfo = _tiles[index];\n\n      // Skip any tile that is not in memory. Deleting anything else\n      // would not make sense here anyway. But, more important, it is essential never to delete\n      // _tiles[] entries for tiles in loading state. Otherwise, the newly arriving textures\n      // would get lost.\n      if (tileInfo.state !== TileState_Loaded) {\n        continue;\n      }\n\n      // don't remove tiles that are currently in use. It's better to\n      // exceed the cache limit a bit than to permanently delete and load\n      // the same tiles.\n      if (tileInUse(tileInfo)) {\n        break;\n      }\n\n      // dispose texture and unregister material from MaterialManager\n      // Note that it is important here that each material is unique per tile.\n      disposeMaterial(tileInfo);\n\n      delete _tiles[index];\n    }\n  }\n\n  // Applies the matrix transform to the current scene\n  // Returns the camera in case it was modified\n  function applyTransform(scene, frustum, camera) {\n    var matrixWorld = scene.matrixWorld;\n    if (_matrix) {\n      // Apply matrix to scene (to place in correct final place). This sets all the transformations\n      // to the scene containing the meshes.\n      matrixWorld.multiplyMatrices(_matrix, scene.matrix);\n    } else {\n      matrixWorld.copy(scene.matrix);\n    }\n\n    if (!matrixWorld.equals(_identity)) {\n      matrixWorld.decompose(_pos, _rotate, _scale);\n\n      _matrixWithoutScale.makeRotationFromQuaternion(_rotate);\n      _matrixWithoutScale.setPosition(_pos);\n\n      _scaleX = _scale.x;\n      _scaleY = _scale.y;\n\n      // To avoid complicating the tiles priority and size calculation, we assume their position and rotation stay\n      // the same, and instead apply the inverse matrix to the camera. Only the scale (_scaleX/Y) will be multiplied\n      // to the tile's size.\n      //\n      // First time _transformedCamera is passed it will create a camera to be reused\n      _transformedCamera = camera.clone(_transformedCamera);\n\n      _invMatrixWithoutScale.getInverse(_matrixWithoutScale);\n\n      _transformedCamera.applyMatrix4(_invMatrixWithoutScale);\n      _transformedCamera.updateCameraMatrices();\n      frustum.reset(_transformedCamera);\n\n      camera = _transformedCamera;\n    } else {// Reset the scale\n      _scaleX = 1;\n      _scaleY = 1;\n    }\n\n    return camera;\n  }\n\n  /** Start iterator \n     *   @param: {FrustumIntersector} frustum  \n     *   @param: {UnifiedCamera}      camera\n     *   @param: {number}             [viewIndex] - only needed when managing multiple views\n     */\n  this.reset = function (frustum, camera, viewIndex) {\n\n    viewIndex = viewIndex || 0;\n\n    // Currently we only support additional views for offline rendering parallel to the main view.\n    // Therefore:\n    //  - We do LRU caching only for main view\n    //  - The restriction of max uploads per frame is disabled for offline views\n    var isOfflineView = viewIndex > 0;\n\n    var scene = _scenes[viewIndex];\n\n    camera = applyTransform(scene, frustum, camera);\n    // Make sure that no mesh objects are leaked in WebGLRenderer. It would be more efficient to do this\n    // only once per tile. But since we also create temporary placeholder meshes for tiles displayed at lower\n    // resolution, this solution is the simplest and safest. The overhead is not signficiant, because\n    // the number of rendered tiles is limited and these events do not dispose geometry or material\n    // (which would be expensive)\n    var i, tile;\n    for (i = 0; i < scene.children.length; i++) {\n      var obj = scene.children[i];\n      obj.dispatchEvent({ type: 'removed' });\n    }\n\n    // clear scene\n    scene.children.length = 0;\n\n    // track iterator restarts for LRU cache cleanup\n    _timeStamps[viewIndex]++;\n\n    // reset counter of tiles that we mark as \"currently used\" by updating their timestamp\n    _numActiveTiles = 0;\n\n    // reset counter for reused temp geometry.\n    gm.reset();\n\n    // scene is empty as long as the root tile is not loaded\n    var root = new TileCoords(0, 0, 0);\n    if (!tileLoaded(root)) {\n      _done[viewIndex] = true;\n      return false;\n    }\n\n    // Set of candidates, sorted by decreasing priority.                \n    var candidates = new SortedList(moreImportant);\n\n    // start with root tile as only candidate\n    var rootTile = new TileCoords(0, 0, 0);\n    var prio = computeTilePriority(rootTile, frustum, camera.position);\n    candidates.add(new Candidate(rootTile, prio));\n\n    // normalized view direction\n    var camDir = camera.getWorldDirection();\n\n    // In this loop, we recursively traverse the tile hierarchy to find relevant tiles for the current view.\n    // As a result, the three arrays below will be filled.\n    // By construction, all arrays will be sorted by decreasing priority.\n    var visibleTiles = []; // visible tiles that we will use for rendering\n    var culledTiles = []; // tiles at appropriate resolution, but outside the view frustum (good prefetching candidates)\n    var missingTiles = []; // tiles that are not in memory, but required for current view. This includes parents of tiles in use.\n    while (candidates.size() > 0) {\n\n      // get and remove max-priority candidate\n      var candidate = candidates.get(0);\n      tile = candidate.tile;\n      candidates.removeAt(0);\n\n      // skip tiles outside the image dimensions\n      if (tileOutside(tile)) {\n        continue;\n      }\n\n      var refine = true;\n\n      // stop if we reached a leaf tile\n      if (tile.level === _config.maxLevel) {\n        // this is a leaf tile.\n        refine = false;\n      }\n\n      // if the screen size of the tile is already smaller than its\n      // image resolution, there is no point in further refinement.\n      var screenSize = estimateScreenSize(tile, camera, camDir);\n      if (screenSize < _config.tileSize && _config.isLevelPresent(tile.level)) {\n        // tile does not need more refinement\n        refine = false;\n      }\n\n      // For all tiles in frustum...\n      var visible = tileInFrustum(tile, frustum);\n      if (visible) {\n\n        // Request tile if missing\n        if (!tileLoaded(tile) && _config.isLevelPresent(tile.level)) {\n          missingTiles.push(tile);\n        }\n\n        // protect it from removal due to cleanuop\n        updateTimeStamp(tile, viewIndex);\n      }\n\n      // Block refinement if we collected enough tiles\n      if (!visible && visibleTiles.length + culledTiles.length > _config.maxActiveTiles) {\n        refine = false;\n      }\n\n      // Note that we also refine tiles that are not in memory. This is done to ensure that the\n      // traversal is stable: In this way, required tiles always get the latest timeStamp,\n      // no matter whether their parents are missing or not.\n\n      // Traverse children or collect the tile\n      if (refine) {\n        // refine tile into its 4 children\n        for (var c = 0; c < 4; c++) {\n          var child = tile.getChild(c);\n          prio = computeTilePriority(child, frustum, camera.position);\n\n          // consider child as new candidate\n          candidates.add(new Candidate(child, prio));\n        }\n      } else {\n        // Collect tile and stop refinement\n        if (visible) {\n          visibleTiles.push(tile);\n        } else {\n          culledTiles.push(tile);\n        }\n      }\n    }\n\n    // track how many new textures we add in this frame.\n    var numNewTextures = 0;\n\n    // any redraws would produce the same result until a new tile arrives.\n    _needsRedraw = false;\n\n    // track if all required tiles are available for rendering\n    var sceneComplete = true;\n\n    // add tile shapes for all visible tiles to the scene\n    for (i = 0; i < visibleTiles.length; ++i) {\n      tile = visibleTiles[i];\n      var shape = getTileShape(tile);\n\n      if (shape && shape.material.map.needsUpdate && !_aggressivePrefetching) {\n        // this shape will trigger a new texture decode/upload in FireFlyRenderer\n        if (numNewTextures < _maxTextureUpdatesPerFrame || isOfflineView) {\n          // just track number of new textures\n          numNewTextures++;\n        } else {\n          // don't allow more texture upload in this frame.\n          // use a fallback texture instead.\n          shape = createTileShape(tile, null, true);\n\n          // trigger redraw, so that the remaining texture uploads\n          // are done in subsequent frames.\n          _needsRedraw = true;\n\n          // don't fire sceneComplete callback yet, before all\n          // required textures are uploaded.\n          sceneComplete = false;\n        }\n      }\n\n      // Some tiles might not be loaded yet, but already needed in \n      // order to show their loaded siblings at higher resolution.\n      if (!shape) {\n        // For these tiles, we create a \"fallback\" tile that\n        // is using the material of a lower-resolution parent,\n        // but is instantly available. This makes tile loading significantly \n        // faster, because we don't have wait for all siblings of tiles we need.\n        shape = createTileShape(tile, null, false);\n\n        sceneComplete = false;\n      }\n      scene.add(shape);\n    }\n\n    // return _scene in next nextBatch() call.\n    _done[viewIndex] = false;\n\n    // send requests for missing visible tiles\n    var numNewRequests = requestTiles(missingTiles, frustum, camera.position);\n\n    // tiles that are currently being loaded are also considered as being active, because\n    // they will soon require some memory as well\n    _numActiveTiles += _numRequests;\n\n    // Process some tiles outside the frustum for prefetching (if our budget allows it)\n    var prefetchRequests = [];\n    for (i = 0; i < culledTiles.length; i++) {\n\n      // stop if our active tile limit is reached\n      if (_numActiveTiles >= _config.maxActiveTiles) {\n        break;\n      }\n\n      tile = culledTiles[i];\n\n      if (!tileLoaded(tile)) {\n        // tile is not in memory yet => consider for request\n        prefetchRequests.push(tile);\n        _numActiveTiles++;\n      } else {\n        // tile is already in memory. Just set its timestamp to keep it in memory\n        // mark this tile and its parents as active if our budget allows it.\n        for (var level = 0; level <= tile.level; level++) {\n          // mark parent as active\n          var parent = tile.getParentAtLevel(level);\n          updateTimeStamp(parent, viewIndex);\n\n          // stop if we reached the limit\n          if (_numActiveTiles > _config.maxActiveTiles) {\n            break;\n          }\n        }\n      }\n    }\n    // add some more requests for prefetching of tiles close to the view frustum\n    numNewRequests += requestTiles(prefetchRequests, frustum, camera.position);\n\n    if (_aggressivePrefetching) {\n      // Get some of the children for faster zooming\n      prefetchRequests = [];\n      for (i = 0; i < visibleTiles.length; ++i) {\n\n        tile = visibleTiles[i];\n        if (tile.level === _config.maxLevel || !_config.isLevelPresent(tile.level + 1)) {\n          continue;\n        }\n\n        for (var _c = 0; _c < 4; _c++) {\n          var _child = tile.getChild(_c);\n          if (tileOutside(_child) || !tileInFrustum(_child, frustum)) {\n            continue;\n          }\n\n          if (!tileLoaded(_child)) {\n            // tile is not in memory yet => consider for request\n            prefetchRequests.push(_child);\n            _numActiveTiles++;\n          }\n        }\n      }\n\n      numNewRequests += requestTiles(prefetchRequests, frustum, camera.position);\n    }\n\n    // Note: LRU caching is currently only done for the main view. For any other views\n    //       we only protect active tiles from being deleted.\n    if (!isOfflineView) {\n      // clear tiles from LRU cache if needed\n      // Note that we must not dispose any material that is used in this\n      // frame. This is ensured, because we never delete tiles with\n      // the current frame timestamp.\n      cacheCleanup(numNewRequests, frustum, camera.position);\n    }\n\n    // trigger callback if\n    if (sceneComplete && _onRefinedCallbacks.length > 0) {\n      // Note: At this point, we are usually in the middle of a rendering cycle. Although the scene is now\n      // fully refined, it is not visible on screen yet. Therefore, we defer the event so that the\n      // current animation cycle can be finished first.\n      var callbacks = _onRefinedCallbacks.splice(0, _onRefinedCallbacks.length);\n      setTimeout(function () {\n        for (var i = 0; i < callbacks.length; i++) {\n          callbacks[i](viewIndex);\n        }\n      }, 1);\n    }\n\n    return sceneComplete;\n  };\n\n  /** @param {function} cb - A callback without params or return value. Called once as soon as all textures have\n      *                         been refined to the required resolution for the current view. */\n  this.callWhenRefined = function (cb) {\n    _onRefinedCallbacks.push(cb);\n  };\n\n  /** @returns {bool} Indicates that a full redraw is required to see the latest state. */\n  this.update = function () {\n    return _needsRedraw;\n  };\n\n  /**\n      * @param {number} newScale \n      */\n  this.setDpiScale = function (newScale) {\n    _dpiScale = newScale;\n  };\n\n  /**\n      * @returns {number}\n      */\n  this.getDpiScale = function () {\n    return _dpiScale;\n  };\n\n  this.setThemingColor = function (c) {\n    _themingColor.copy(c);\n  };\n\n  this.clearThemingColor = function () {\n    _themingColor.copy(_defaultTheming);\n  };\n\n  this.unregisterView = function (viewIndex) {\n    _scenes[viewIndex] = undefined;\n    _timeStamps[viewIndex] = undefined;\n    _done[viewIndex] = undefined;\n\n    // remove unused array entries\n    var newLength = _scenes.length;\n    while (newLength > 0 && !_scenes[newLength - 1]) {newLength--;}\n    _scenes.length = newLength;\n    _timeStamps.length = newLength;\n    _done.length = newLength;\n  };\n}","import * as THREE from \"three\";\n\n// Simple helper to describe uv offset and scale\nexport function UVTransform() {\n  this.offsetX = 0.0;\n  this.offsetY = 0.0;\n  this.scaleX = 1.0;\n  this.scaleY = 1.0;\n}\n\nUVTransform.prototype.toVec4 = function () {\n  return new THREE.Vector4(this.offsetX, this.offsetY, this.scaleX, this.scaleY);\n};\n\nUVTransform.prototype.copyTo = function (otherUV) {\n  otherUV.offsetX = this.offsetX;\n  otherUV.offsetY = this.offsetY;\n  otherUV.scaleX = this.scaleX;\n  otherUV.scaleY = this.scaleY;\n};\n\nexport function GeometryManager() {\n  // reused geometry for on-the-fly generated fallback tiles, which require individual uv-coords\n  // It would be better to share _quadGeom for these as well. But this is would require a solution\n  // first how we can use the same texture with different uvTransforms in a single frame.\n  var _reusedGeoms = []; // {THREE.Geometry}\n  // index to the first elem in _reusedGeoms that has not been used for the current frame yet.\n  var _nextFreeGeom = 0;\n\n  var _uvTransformIdentity = new UVTransform();\n\n  /** Updates the uv-coords for a given quad geometry.\n                                                 *   @param {THREE.Geometry} geom\n                                                 *   @param {UVTransform}    [uvTransform] - default: identity\n                                                 */\n  function setUVCoords(geom, uvTransform) {\n\n    var tf = uvTransform ? uvTransform : _uvTransformIdentity;\n\n    var uvs = [];\n    uvs.push(new THREE.Vector2(tf.offsetX, tf.offsetY));\n    uvs.push(new THREE.Vector2(tf.offsetX + tf.scaleX, tf.offsetY));\n    uvs.push(new THREE.Vector2(tf.offsetX + tf.scaleX, tf.offsetY + tf.scaleY));\n    uvs.push(new THREE.Vector2(tf.offsetX, tf.offsetY + tf.scaleY));\n\n    geom.faceVertexUvs[0].length = 0;\n    geom.faceVertexUvs[0].push([uvs[0], uvs[1], uvs[2]]);\n    geom.faceVertexUvs[0].push([uvs[0], uvs[2], uvs[3]]);\n    geom.uvTransform = tf;\n    geom.uvsNeedUpdate = true;\n  }\n\n  /**\n     * Returns a reusable geometry and recomputes its uv coords based on given scale and offset.\n     *  @param   {UVTransform}    [uvOffsetX]\n     *  @returns {THREE.Geometry} A geometry from _reusedGeoms\n     */\n  this.acquireQuadGeom = function (uvTransform) {\n\n    // get next reusable mesh and increase counter\n    var geom = _reusedGeoms[_nextFreeGeom];\n\n    // if not available yet, create it\n    if (!geom) {\n      geom = this.createQuadGeom(uvTransform);\n\n      // keep it for reuse in later frames\n      _reusedGeoms[_nextFreeGeom] = geom;\n    } else {\n      // reuse old geom and just update uv\n      setUVCoords(geom, uvTransform);\n    }\n\n    // inc counter so that this geom is not used again in this frame\n    _nextFreeGeom++;\n    return geom;\n  };\n\n  /**\n      *  @param {UVTransform} [uvTransform]\n      *  @returns {THREE.Geometry}\n      */\n  this.createQuadGeom = function (uvTransform) {\n\n    // vertices\n    var geom = new THREE.Geometry();\n    geom.vertices.push(\n    new THREE.Vector3(0.0, 0.0, 0.0),\n    new THREE.Vector3(1.0, 0.0, 0.0),\n    new THREE.Vector3(1.0, 1.0, 0.0),\n    new THREE.Vector3(0.0, 1.0, 0.0));\n\n\n    // indices\n    geom.faces.push(new THREE.Face3(0, 1, 2));\n    geom.faces.push(new THREE.Face3(0, 2, 3));\n\n    setUVCoords(geom, uvTransform);\n\n    geom.computeFaceNormals();\n\n    return geom;\n  };\n\n  this.reset = function () {\n    _nextFreeGeom = 0;\n  };\n\n  this.dispose = function () {\n    for (var i = 0; i < _reusedGeoms.length; i++) {\n      var geom = _reusedGeoms[i];\n      if (geom) {\n        geom.dispose();\n        geom.needsUpdate = true;\n      }\n    }\n  };\n}","/** \n * Helper struct to work with tile quadtree structure.\n * @constructor\n */\nexport function TileCoords(level, x, y) {\n  this.level = level;\n  this.x = x;\n  this.y = y;\n}\n\nTileCoords.prototype = {\n\n  constructor: TileCoords,\n\n  copy: function copy() {\n    return new TileCoords(this.level, this.x, this.y);\n  },\n\n  /** returns {bool} */\n  isValid: function isValid() {\n    return Number.isInteger(this.level) && this.level >= 0 && Number.isInteger(this.x) && Number.isInteger(this.y);\n  },\n\n  /* @param   {number}     child - must be in [0,3] \n      * @returns {TileCoords} \n      */\n  getChild: function getChild(child) {\n\n    var xOffset = child & 1 ? 1 : 0;\n    var yOffset = child & 2 ? 1 : 0;\n    return new TileCoords(\n    this.level + 1,\n    this.x * 2 + xOffset,\n    this.y * 2 + yOffset);\n\n  },\n\n  /**\n      *  @returns {TileCoords|null} Parent tile or null if this tile was root or invalid.\n      */\n  getParent: function getParent() {\n    if (this.level === 0) {\n      return null;\n    }\n    return new TileCoords(this.level - 1, Math.floor(this.x / 2), Math.floor(this.y / 2));\n  },\n\n  /**\n      *   Computes the subtree root at a given level. 'level' must be <= the current level.\n      *    @param {number} level\n      *    @returns {TileCoords|null}\n      */\n  getParentAtLevel: function getParentAtLevel(level) {\n    if (level < 0 || level > this.level) {\n      return null;\n    }\n\n    // compute level difference\n    var levelDiff = this.level - level;\n\n    // compute column and row at this level\n    var c = Math.floor(this.x >> levelDiff);\n    var r = Math.floor(this.y >> levelDiff);\n\n    return new TileCoords(level, c, r);\n  },\n\n  /** @returns {string} E.g., \"(1,1,2)\" */\n  toString: function toString() {\n    return \"(\" + this.level + \", \" + this.x + \", \" + this.y + \")\";\n  },\n\n  /** \n      * Can be called either with a single TileCoords param or with (level, x, y) as integers.\n      *   @param {TileCoords|number} levelOrTile\n      *   @param {number}            [x] \n      *   @param {number}            [y]\n      *   @returns {bool} \n      */\n  equals: function equals(levelOrTile, x, y) {\n\n    if (levelOrTile instanceof TileCoords) {\n      return this.equals(levelOrTile.level, levelOrTile.x, levelOrTile.y);\n    }\n\n    return this.level === levelOrTile && this.x === x && this.y === y;\n  } };\n\n\n/** Computes the number of tiles at a given level, assuming a complete tree.\n        *   @param   {number} level must be >=0\n        *   @returns {number} \n        */\nfunction tilesAtLevel(level) {\n  return 1 << level;\n}\n\n/** \n   * Inverse of index2Tile (see below).\n   * Note that this is only possible as long as all tiles share a common root tile (0,0,0).\n   *  @param   {TileCoords} \n   *  @returns {number}\n   */\nexport function tile2Index(tile) {\n\n  // level 0 has 1 tile and the number of tiles grows by factor 4 with each level.\n  // Using geometric sum formula, we obtain the summed number of tiles for\n  // levels 0,...,tile.level-1 as:\n  var firstTileInLevel = ((1 << 2 * tile.level) - 1) / 3;\n\n  // compute individual index per row/column pair\n  var tilesPerRow = 1 << tile.level;\n\n  return firstTileInLevel + tile.y * tilesPerRow + tile.x;\n}\n\n/** \n   * Enumerates all tiles of a complete quadtree in breadth-first order. \n   *  @param   {number} int >= 0\n   *  @returns {TileCoords}\n   */\nexport function index2Tile(index) {\n\n  var tile = new TileCoords(0, 0, 0);\n\n  // find level maximum level for which the index is <= the target index\n  while (tile2Index(tile) <= index) {\n    tile.level++;\n  }\n  tile.level--;\n\n  // compute the local index inside this level\n  var localIndex = index - tile2Index(tile);\n\n  // Having the level, we can compute index and column\n  var tilesPerRow = 1 << tile.level;\n  tile.y = Math.floor(localIndex / tilesPerRow);\n  tile.x = localIndex % tilesPerRow;\n\n  return tile;\n}","function _typeof(obj) {\"@babel/helpers - typeof\";if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {_typeof = function _typeof(obj) {return typeof obj;};} else {_typeof = function _typeof(obj) {return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;};}return _typeof(obj);} /*! Hammer.JS - v2.0.8 - 2016-04-23\n                                                                                                                                                                                                                                                                                                                                                                                * http://hammerjs.github.io/\n                                                                                                                                                                                                                                                                                                                                                                                *\n                                                                                                                                                                                                                                                                                                                                                                                * Copyright (c) 2016 Jorik Tangelder;\n                                                                                                                                                                                                                                                                                                                                                                                * Licensed under the MIT license */\n(function (window, document, exportName, undefined) {\n  'use strict';\n\n  var VENDOR_PREFIXES = ['', 'webkit', 'Moz', 'MS', 'ms', 'o'];\n  var TEST_ELEMENT = document.createElement('div');\n\n  var TYPE_FUNCTION = 'function';\n\n  var round = Math.round;\n  var abs = Math.abs;\n  var now = Date.now;\n\n  /**\n                       * set a timeout with a given scope\n                       * @param {Function} fn\n                       * @param {Number} timeout\n                       * @param {Object} context\n                       * @returns {number}\n                       */\n  function setTimeoutContext(fn, timeout, context) {\n    return setTimeout(bindFn(fn, context), timeout);\n  }\n\n  /**\n     * if the argument is an array, we want to execute the fn on each entry\n     * if it aint an array we don't want to do a thing.\n     * this is used by all the methods that accept a single and array argument.\n     * @param {*|Array} arg\n     * @param {String} fn\n     * @param {Object} [context]\n     * @returns {Boolean}\n     */\n  function invokeArrayArg(arg, fn, context) {\n    if (Array.isArray(arg)) {\n      each(arg, context[fn], context);\n      return true;\n    }\n    return false;\n  }\n\n  /**\n     * walk objects and arrays\n     * @param {Object} obj\n     * @param {Function} iterator\n     * @param {Object} context\n     */\n  function each(obj, iterator, context) {\n    var i;\n\n    if (!obj) {\n      return;\n    }\n\n    if (obj.forEach) {\n      obj.forEach(iterator, context);\n    } else if (obj.length !== undefined) {\n      i = 0;\n      while (i < obj.length) {\n        iterator.call(context, obj[i], i, obj);\n        i++;\n      }\n    } else {\n      for (i in obj) {\n        obj.hasOwnProperty(i) && iterator.call(context, obj[i], i, obj);\n      }\n    }\n  }\n\n  /**\n     * wrap a method with a deprecation warning and stack trace\n     * @param {Function} method\n     * @param {String} name\n     * @param {String} message\n     * @returns {Function} A new function wrapping the supplied method.\n     */\n  function deprecate(method, name, message) {\n    var deprecationMessage = 'DEPRECATED METHOD: ' + name + '\\n' + message + ' AT \\n';\n    return function () {\n      var e = new Error('get-stack-trace');\n      var stack = e && e.stack ? e.stack.replace(/^[^\\(]+?[\\n$]/gm, '').\n      replace(/^\\s+at\\s+/gm, '').\n      replace(/^Object.<anonymous>\\s*\\(/gm, '{anonymous}()@') : 'Unknown Stack Trace';\n\n      var log = window.console && (window.console.warn || window.console.log);\n      if (log) {\n        log.call(window.console, deprecationMessage, stack);\n      }\n      return method.apply(this, arguments);\n    };\n  }\n\n  /**\n     * extend object.\n     * means that properties in dest will be overwritten by the ones in src.\n     * @param {Object} target\n     * @param {...Object} objects_to_assign\n     * @returns {Object} target\n     */\n  var assign = function assign(target) {\n    if (target === undefined || target === null) {\n      throw new TypeError('Cannot convert undefined or null to object');\n    }\n\n    var output = Object(target);\n    for (var index = 1; index < arguments.length; index++) {\n      var source = arguments[index];\n      if (source !== undefined && source !== null) {\n        for (var nextKey in source) {\n          if (source.hasOwnProperty(nextKey)) {\n            output[nextKey] = Array.isArray(source[nextKey]) ? source[nextKey].slice(0) : source[nextKey];\n          }\n        }\n      }\n    }\n    return output;\n  };\n\n\n  /**\n      * extend object.\n      * means that properties in dest will be overwritten by the ones in src.\n      * @param {Object} dest\n      * @param {Object} src\n      * @param {Boolean} [merge=false]\n      * @returns {Object} dest\n      */\n  var extend = deprecate(function extend(dest, src, merge) {\n    var keys = Object.keys(src);\n    var i = 0;\n    while (i < keys.length) {\n      if (!merge || merge && dest[keys[i]] === undefined) {\n        dest[keys[i]] = src[keys[i]];\n      }\n      i++;\n    }\n    return dest;\n  }, 'extend', 'Use `assign`.');\n\n  /**\n                                  * merge the values from src in the dest.\n                                  * means that properties that exist in dest will not be overwritten by src\n                                  * @param {Object} dest\n                                  * @param {Object} src\n                                  * @returns {Object} dest\n                                  */\n  var merge = deprecate(function merge(dest, src) {\n    return extend(dest, src, true);\n  }, 'merge', 'Use `assign`.');\n\n  /**\n                                 * simple class inheritance\n                                 * @param {Function} child\n                                 * @param {Function} base\n                                 * @param {Object} [properties]\n                                 */\n  function inherit(child, base, properties) {\n    var baseP = base.prototype,\n    childP;\n\n    childP = child.prototype = Object.create(baseP);\n    childP.constructor = child;\n    childP._super = baseP;\n\n    if (properties) {\n      assign(childP, properties);\n    }\n  }\n\n  /**\n     * simple function bind\n     * @param {Function} fn\n     * @param {Object} context\n     * @returns {Function}\n     */\n  function bindFn(fn, context) {\n    return function boundFn() {\n      return fn.apply(context, arguments);\n    };\n  }\n\n  /**\n     * let a boolean value also be a function that must return a boolean\n     * this first item in args will be used as the context\n     * @param {Boolean|Function} val\n     * @param {Array} [args]\n     * @returns {Boolean}\n     */\n  function boolOrFn(val, args) {\n    if (_typeof(val) == TYPE_FUNCTION) {\n      return val.apply(args ? args[0] || undefined : undefined, args);\n    }\n    return val;\n  }\n\n  /**\n     * use the val2 when val1 is undefined\n     * @param {*} val1\n     * @param {*} val2\n     * @returns {*}\n     */\n  function ifUndefined(val1, val2) {\n    return val1 === undefined ? val2 : val1;\n  }\n\n  /**\n     * addEventListener with multiple events at once\n     * @param {EventTarget} target\n     * @param {String} types\n     * @param {Function} handler\n     */\n  function addEventListeners(target, types, handler) {\n    each(splitStr(types), function (type) {\n      target.addEventListener(type, handler, false);\n    });\n  }\n\n  /**\n     * removeEventListener with multiple events at once\n     * @param {EventTarget} target\n     * @param {String} types\n     * @param {Function} handler\n     */\n  function removeEventListeners(target, types, handler) {\n    each(splitStr(types), function (type) {\n      target.removeEventListener(type, handler, false);\n    });\n  }\n\n  /**\n     * find if a node is in the given parent\n     * @method hasParent\n     * @param {HTMLElement} node\n     * @param {HTMLElement} parent\n     * @return {Boolean} found\n     */\n  function hasParent(node, parent) {\n    while (node) {\n      if (node == parent) {\n        return true;\n      }\n      node = node.parentNode;\n    }\n    return false;\n  }\n\n  /**\n     * small indexOf wrapper\n     * @param {String} str\n     * @param {String} find\n     * @returns {Boolean} found\n     */\n  function inStr(str, find) {\n    return str.indexOf(find) > -1;\n  }\n\n  /**\n     * split string on whitespace\n     * @param {String} str\n     * @returns {Array} words\n     */\n  function splitStr(str) {\n    return str.trim().split(/\\s+/g);\n  }\n\n  /**\n     * find if a array contains the object using indexOf or a simple polyFill\n     * @param {Array} src\n     * @param {String} find\n     * @param {String} [findByKey]\n     * @return {Boolean|Number} false when not found, or the index\n     */\n  function inArray(src, find, findByKey) {\n    if (src.indexOf && !findByKey) {\n      return src.indexOf(find);\n    } else {\n      var i = 0;\n      while (i < src.length) {\n        if (findByKey && src[i][findByKey] == find || !findByKey && src[i] === find) {\n          return i;\n        }\n        i++;\n      }\n      return -1;\n    }\n  }\n\n  /**\n     * convert array-like objects to real arrays\n     * @param {Object} obj\n     * @returns {Array}\n     */\n  function toArray(obj) {\n    return Array.prototype.slice.call(obj, 0);\n  }\n\n  /**\n     * unique array with objects based on a key (like 'id') or just by the array's value\n     * @param {Array} src [{id:1},{id:2},{id:1}]\n     * @param {String} [key]\n     * @param {Boolean} [sort=False]\n     * @returns {Array} [{id:1},{id:2}]\n     */\n  function uniqueArray(src, key, sort) {\n    var results = [];\n    var values = [];\n    var i = 0;\n\n    while (i < src.length) {\n      var val = key ? src[i][key] : src[i];\n      if (inArray(values, val) < 0) {\n        results.push(src[i]);\n      }\n      values[i] = val;\n      i++;\n    }\n\n    if (sort) {\n      if (!key) {\n        results = results.sort();\n      } else {\n        results = results.sort(function sortUniqueArray(a, b) {\n          return a[key] > b[key];\n        });\n      }\n    }\n\n    return results;\n  }\n\n  /**\n     * get the prefixed property\n     * @param {Object} obj\n     * @param {String} property\n     * @returns {String|Undefined} prefixed\n     */\n  function prefixed(obj, property) {\n    var prefix, prop;\n    var camelProp = property[0].toUpperCase() + property.slice(1);\n\n    var i = 0;\n    while (i < VENDOR_PREFIXES.length) {\n      prefix = VENDOR_PREFIXES[i];\n      prop = prefix ? prefix + camelProp : property;\n\n      if (prop in obj) {\n        return prop;\n      }\n      i++;\n    }\n    return undefined;\n  }\n\n  /**\n     * get a unique id\n     * @returns {number} uniqueId\n     */\n  var _uniqueId = 1;\n  function uniqueId() {\n    return _uniqueId++;\n  }\n\n  /**\n     * get the window object of an element\n     * @param {HTMLElement} element\n     * @returns {DocumentView|Window}\n     */\n  function getWindowForElement(element) {\n    var doc = element.ownerDocument || element;\n    return doc.defaultView || doc.parentWindow || window;\n  }\n\n  var MOBILE_REGEX = /mobile|tablet|ip(ad|hone|od)|android/i;\n\n  var SUPPORT_TOUCH = ('ontouchstart' in window);\n  var SUPPORT_POINTER_EVENTS = prefixed(window, 'PointerEvent') !== undefined;\n  var SUPPORT_ONLY_TOUCH = SUPPORT_TOUCH && MOBILE_REGEX.test(navigator.userAgent);\n\n  var INPUT_TYPE_TOUCH = 'touch';\n  var INPUT_TYPE_PEN = 'pen';\n  var INPUT_TYPE_MOUSE = 'mouse';\n  var INPUT_TYPE_KINECT = 'kinect';\n\n  var COMPUTE_INTERVAL = 25;\n\n  var INPUT_START = 1;\n  var INPUT_MOVE = 2;\n  var INPUT_END = 4;\n  var INPUT_CANCEL = 8;\n\n  var DIRECTION_NONE = 1;\n  var DIRECTION_LEFT = 2;\n  var DIRECTION_RIGHT = 4;\n  var DIRECTION_UP = 8;\n  var DIRECTION_DOWN = 16;\n\n  var DIRECTION_HORIZONTAL = DIRECTION_LEFT | DIRECTION_RIGHT;\n  var DIRECTION_VERTICAL = DIRECTION_UP | DIRECTION_DOWN;\n  var DIRECTION_ALL = DIRECTION_HORIZONTAL | DIRECTION_VERTICAL;\n\n  var PROPS_XY = ['x', 'y'];\n  var PROPS_CLIENT_XY = ['clientX', 'clientY'];\n\n  /**\n                                                 * create new input type manager\n                                                 * @param {Manager} manager\n                                                 * @param {Function} callback\n                                                 * @returns {Input}\n                                                 * @constructor\n                                                 */\n  function Input(manager, callback) {\n    var self = this;\n    this.manager = manager;\n    this.callback = callback;\n    this.element = manager.element;\n    this.target = manager.options.inputTarget;\n\n    // smaller wrapper around the handler, for the scope and the enabled state of the manager,\n    // so when disabled the input events are completely bypassed.\n    this.domHandler = function (ev) {\n      if (boolOrFn(manager.options.enable, [manager])) {\n        self.handler(ev);\n      }\n    };\n\n    this.init();\n\n  }\n\n  Input.prototype = {\n    /**\n                       * should handle the inputEvent data and trigger the callback\n                       * @virtual\n                       */\n    handler: function handler() {},\n\n    /**\n                                     * bind the events\n                                     */\n    init: function init() {\n      this.evEl && addEventListeners(this.element, this.evEl, this.domHandler);\n      this.evTarget && addEventListeners(this.target, this.evTarget, this.domHandler);\n      this.evWin && addEventListeners(getWindowForElement(this.element), this.evWin, this.domHandler);\n    },\n\n    /**\n        * unbind the events\n        */\n    destroy: function destroy() {\n      this.evEl && removeEventListeners(this.element, this.evEl, this.domHandler);\n      this.evTarget && removeEventListeners(this.target, this.evTarget, this.domHandler);\n      this.evWin && removeEventListeners(getWindowForElement(this.element), this.evWin, this.domHandler);\n    } };\n\n\n  /**\n          * create new input type manager\n          * called by the Manager constructor\n          * @param {Hammer} manager\n          * @returns {Input}\n          */\n  function createInputInstance(manager) {\n    var Type;\n    var inputClass = manager.options.inputClass;\n\n    if (inputClass) {\n      Type = inputClass;\n    } else if (SUPPORT_POINTER_EVENTS) {\n      Type = PointerEventInput;\n    } else if (SUPPORT_ONLY_TOUCH) {\n      Type = TouchInput;\n    } else if (!SUPPORT_TOUCH) {\n      Type = MouseInput;\n    } else {\n      Type = TouchMouseInput;\n    }\n    return new Type(manager, inputHandler);\n  }\n\n  /**\n     * handle input events\n     * @param {Manager} manager\n     * @param {String} eventType\n     * @param {Object} input\n     */\n  function inputHandler(manager, eventType, input) {\n    var pointersLen = input.pointers.length;\n    var changedPointersLen = input.changedPointers.length;\n    var isFirst = eventType & INPUT_START && pointersLen - changedPointersLen === 0;\n    var isFinal = eventType & (INPUT_END | INPUT_CANCEL) && pointersLen - changedPointersLen === 0;\n\n    input.isFirst = !!isFirst;\n    input.isFinal = !!isFinal;\n\n    if (isFirst) {\n      manager.session = {};\n    }\n\n    // source event is the normalized value of the domEvents\n    // like 'touchstart, mouseup, pointerdown'\n    input.eventType = eventType;\n\n    // compute scale, rotation etc\n    computeInputData(manager, input);\n\n    // emit secret event\n    manager.emit('hammer.input', input);\n\n    manager.recognize(input);\n    manager.session.prevInput = input;\n  }\n\n  /**\n     * extend the data with some usable properties like scale, rotate, velocity etc\n     * @param {Object} manager\n     * @param {Object} input\n     */\n  function computeInputData(manager, input) {\n    var session = manager.session;\n    var pointers = input.pointers;\n    var pointersLength = pointers.length;\n\n    // store the first input to calculate the distance and direction\n    if (!session.firstInput) {\n      session.firstInput = simpleCloneInputData(input);\n    }\n\n    // to compute scale and rotation we need to store the multiple touches\n    if (pointersLength > 1 && !session.firstMultiple) {\n      session.firstMultiple = simpleCloneInputData(input);\n    } else if (pointersLength === 1) {\n      session.firstMultiple = false;\n    }\n\n    var firstInput = session.firstInput;\n    var firstMultiple = session.firstMultiple;\n    var offsetCenter = firstMultiple ? firstMultiple.center : firstInput.center;\n\n    var center = input.center = getCenter(pointers);\n    input.timeStamp = now();\n    input.deltaTime = input.timeStamp - firstInput.timeStamp;\n\n    input.angle = getAngle(offsetCenter, center);\n    input.distance = getDistance(offsetCenter, center);\n\n    computeDeltaXY(session, input);\n    input.offsetDirection = getDirection(input.deltaX, input.deltaY);\n\n    var overallVelocity = getVelocity(input.deltaTime, input.deltaX, input.deltaY);\n    input.overallVelocityX = overallVelocity.x;\n    input.overallVelocityY = overallVelocity.y;\n    input.overallVelocity = abs(overallVelocity.x) > abs(overallVelocity.y) ? overallVelocity.x : overallVelocity.y;\n\n    input.scale = firstMultiple ? getScale(firstMultiple.pointers, pointers) : 1;\n    input.rotation = firstMultiple ? getRotation(firstMultiple.pointers, pointers) : 0;\n\n    input.maxPointers = !session.prevInput ? input.pointers.length : input.pointers.length >\n    session.prevInput.maxPointers ? input.pointers.length : session.prevInput.maxPointers;\n\n    computeIntervalInputData(session, input);\n\n    // find the correct target\n    var target = manager.element;\n    if (hasParent(input.srcEvent.target, target)) {\n      target = input.srcEvent.target;\n    }\n    input.target = target;\n  }\n\n  function computeDeltaXY(session, input) {\n    var center = input.center;\n    var offset = session.offsetDelta || {};\n    var prevDelta = session.prevDelta || {};\n    var prevInput = session.prevInput || {};\n\n    if (input.eventType === INPUT_START || prevInput.eventType === INPUT_END) {\n      prevDelta = session.prevDelta = {\n        x: prevInput.deltaX || 0,\n        y: prevInput.deltaY || 0 };\n\n\n      offset = session.offsetDelta = {\n        x: center.x,\n        y: center.y };\n\n    }\n\n    input.deltaX = prevDelta.x + (center.x - offset.x);\n    input.deltaY = prevDelta.y + (center.y - offset.y);\n  }\n\n  /**\n     * velocity is calculated every x ms\n     * @param {Object} session\n     * @param {Object} input\n     */\n  function computeIntervalInputData(session, input) {\n    var last = session.lastInterval || input,\n    deltaTime = input.timeStamp - last.timeStamp,\n    velocity,velocityX,velocityY,direction;\n\n    if (input.eventType != INPUT_CANCEL && (deltaTime > COMPUTE_INTERVAL || last.velocity === undefined)) {\n      var deltaX = input.deltaX - last.deltaX;\n      var deltaY = input.deltaY - last.deltaY;\n\n      var v = getVelocity(deltaTime, deltaX, deltaY);\n      velocityX = v.x;\n      velocityY = v.y;\n      velocity = abs(v.x) > abs(v.y) ? v.x : v.y;\n      direction = getDirection(deltaX, deltaY);\n\n      session.lastInterval = input;\n    } else {\n      // use latest velocity info if it doesn't overtake a minimum period\n      velocity = last.velocity;\n      velocityX = last.velocityX;\n      velocityY = last.velocityY;\n      direction = last.direction;\n    }\n\n    input.velocity = velocity;\n    input.velocityX = velocityX;\n    input.velocityY = velocityY;\n    input.direction = direction;\n  }\n\n  /**\n     * create a simple clone from the input used for storage of firstInput and firstMultiple\n     * @param {Object} input\n     * @returns {Object} clonedInputData\n     */\n  function simpleCloneInputData(input) {\n    // make a simple copy of the pointers because we will get a reference if we don't\n    // we only need clientXY for the calculations\n    var pointers = [];\n    var i = 0;\n    while (i < input.pointers.length) {\n      pointers[i] = {\n        clientX: round(input.pointers[i].clientX),\n        clientY: round(input.pointers[i].clientY) };\n\n      i++;\n    }\n\n    return {\n      timeStamp: now(),\n      pointers: pointers,\n      center: getCenter(pointers),\n      deltaX: input.deltaX,\n      deltaY: input.deltaY };\n\n  }\n\n  /**\n     * get the center of all the pointers\n     * @param {Array} pointers\n     * @return {Object} center contains `x` and `y` properties\n     */\n  function getCenter(pointers) {\n    var pointersLength = pointers.length;\n\n    // no need to loop when only one touch\n    if (pointersLength === 1) {\n      return {\n        x: round(pointers[0].clientX),\n        y: round(pointers[0].clientY) };\n\n    }\n\n    var x = 0,y = 0,i = 0;\n    while (i < pointersLength) {\n      x += pointers[i].clientX;\n      y += pointers[i].clientY;\n      i++;\n    }\n\n    return {\n      x: round(x / pointersLength),\n      y: round(y / pointersLength) };\n\n  }\n\n  /**\n     * calculate the velocity between two points. unit is in px per ms.\n     * @param {Number} deltaTime\n     * @param {Number} x\n     * @param {Number} y\n     * @return {Object} velocity `x` and `y`\n     */\n  function getVelocity(deltaTime, x, y) {\n    return {\n      x: x / deltaTime || 0,\n      y: y / deltaTime || 0 };\n\n  }\n\n  /**\n     * get the direction between two points\n     * @param {Number} x\n     * @param {Number} y\n     * @return {Number} direction\n     */\n  function getDirection(x, y) {\n    if (x === y) {\n      return DIRECTION_NONE;\n    }\n\n    if (abs(x) >= abs(y)) {\n      return x < 0 ? DIRECTION_LEFT : DIRECTION_RIGHT;\n    }\n    return y < 0 ? DIRECTION_UP : DIRECTION_DOWN;\n  }\n\n  /**\n     * calculate the absolute distance between two points\n     * @param {Object} p1 {x, y}\n     * @param {Object} p2 {x, y}\n     * @param {Array} [props] containing x and y keys\n     * @return {Number} distance\n     */\n  function getDistance(p1, p2, props) {\n    if (!props) {\n      props = PROPS_XY;\n    }\n    var x = p2[props[0]] - p1[props[0]],\n    y = p2[props[1]] - p1[props[1]];\n\n    return Math.sqrt(x * x + y * y);\n  }\n\n  /**\n     * calculate the angle between two coordinates\n     * @param {Object} p1\n     * @param {Object} p2\n     * @param {Array} [props] containing x and y keys\n     * @return {Number} angle\n     */\n  function getAngle(p1, p2, props) {\n    if (!props) {\n      props = PROPS_XY;\n    }\n    var x = p2[props[0]] - p1[props[0]],\n    y = p2[props[1]] - p1[props[1]];\n    return Math.atan2(y, x) * 180 / Math.PI;\n  }\n\n  /**\n     * calculate the rotation degrees between two pointersets\n     * @param {Array} start array of pointers\n     * @param {Array} end array of pointers\n     * @return {Number} rotation\n     */\n  function getRotation(start, end) {\n    return getAngle(end[1], end[0], PROPS_CLIENT_XY) - getAngle(start[1], start[0], PROPS_CLIENT_XY);\n  }\n\n  /**\n     * calculate the scale factor between two pointersets\n     * no scale is 1, and goes down to 0 when pinched together, and bigger when pinched out\n     * @param {Array} start array of pointers\n     * @param {Array} end array of pointers\n     * @return {Number} scale\n     */\n  function getScale(start, end) {\n    return getDistance(end[0], end[1], PROPS_CLIENT_XY) / getDistance(start[0], start[1], PROPS_CLIENT_XY);\n  }\n\n  var MOUSE_INPUT_MAP = {\n    mousedown: INPUT_START,\n    mousemove: INPUT_MOVE,\n    mouseup: INPUT_END };\n\n\n  var MOUSE_ELEMENT_EVENTS = 'mousedown';\n  var MOUSE_WINDOW_EVENTS = 'mousemove mouseup';\n\n  /**\n                                                  * Mouse events input\n                                                  * @constructor\n                                                  * @extends Input\n                                                  */\n  function MouseInput() {\n    this.evEl = MOUSE_ELEMENT_EVENTS;\n    this.evWin = MOUSE_WINDOW_EVENTS;\n\n    this.pressed = false; // mousedown state\n\n    Input.apply(this, arguments);\n  }\n\n  inherit(MouseInput, Input, {\n    /**\n                                * handle mouse events\n                                * @param {Object} ev\n                                */\n    handler: function MEhandler(ev) {\n      var eventType = MOUSE_INPUT_MAP[ev.type];\n\n      // on start we want to have the left mouse button down\n      if (eventType & INPUT_START && ev.button === 0) {\n        this.pressed = true;\n      }\n\n      if (eventType & INPUT_MOVE && ev.which !== 1) {\n        eventType = INPUT_END;\n      }\n\n      // mouse must be down\n      if (!this.pressed) {\n        return;\n      }\n\n      if (eventType & INPUT_END) {\n        this.pressed = false;\n      }\n\n      this.callback(this.manager, eventType, {\n        pointers: [ev],\n        changedPointers: [ev],\n        pointerType: INPUT_TYPE_MOUSE,\n        srcEvent: ev });\n\n    } });\n\n\n  var POINTER_INPUT_MAP = {\n    pointerdown: INPUT_START,\n    pointermove: INPUT_MOVE,\n    pointerup: INPUT_END,\n    pointercancel: INPUT_CANCEL,\n    pointerout: INPUT_CANCEL };\n\n\n  // in IE10 the pointer types is defined as an enum\n  var IE10_POINTER_TYPE_ENUM = {\n    2: INPUT_TYPE_TOUCH,\n    3: INPUT_TYPE_PEN,\n    4: INPUT_TYPE_MOUSE,\n    5: INPUT_TYPE_KINECT // see https://twitter.com/jacobrossi/status/480596438489890816\n  };\n\n  var POINTER_ELEMENT_EVENTS = 'pointerdown';\n  var POINTER_WINDOW_EVENTS = 'pointermove pointerup pointercancel';\n\n  // IE10 has prefixed support, and case-sensitive\n  if (window.MSPointerEvent && !window.PointerEvent) {\n    POINTER_ELEMENT_EVENTS = 'MSPointerDown';\n    POINTER_WINDOW_EVENTS = 'MSPointerMove MSPointerUp MSPointerCancel';\n  }\n\n  /**\n     * Pointer events input\n     * @constructor\n     * @extends Input\n     */\n  function PointerEventInput() {\n    this.evEl = POINTER_ELEMENT_EVENTS;\n    this.evWin = POINTER_WINDOW_EVENTS;\n\n    Input.apply(this, arguments);\n\n    this.store = this.manager.session.pointerEvents = [];\n  }\n\n  inherit(PointerEventInput, Input, {\n    /**\n                                       * handle mouse events\n                                       * @param {Object} ev\n                                       */\n    handler: function PEhandler(ev) {\n      var store = this.store;\n      var removePointer = false;\n\n      var eventTypeNormalized = ev.type.toLowerCase().replace('ms', '');\n      var eventType = POINTER_INPUT_MAP[eventTypeNormalized];\n      var pointerType = IE10_POINTER_TYPE_ENUM[ev.pointerType] || ev.pointerType;\n\n      var isTouch = pointerType === INPUT_TYPE_TOUCH;\n      var isMouse = pointerType === INPUT_TYPE_MOUSE;\n\n      // get index of the event in the store\n      var storeIndex = inArray(store, ev.pointerId, 'pointerId');\n\n      // start and mouse must be down\n      if (eventType & INPUT_START && (ev.button === 0 || isTouch)) {\n        if (storeIndex < 0) {\n          store.push(ev);\n          storeIndex = store.length - 1;\n        }\n      } else if (eventType & (INPUT_END | INPUT_CANCEL)) {\n        removePointer = true;\n      }\n\n      // it not found, so the pointer hasn't been down (so it's probably a hover)\n      if (storeIndex < 0) {\n        return;\n      }\n\n      // update the event in the store\n      store[storeIndex] = ev;\n\n      if (!isMouse || this.manager.options.handlePointerEventMouse) {\n        this.callback(this.manager, eventType, {\n          pointers: store,\n          changedPointers: [ev],\n          pointerType: pointerType,\n          srcEvent: ev });\n\n      }\n\n      if (removePointer) {\n        // remove from the store\n        store.splice(storeIndex, 1);\n      }\n    } });\n\n\n  var SINGLE_TOUCH_INPUT_MAP = {\n    touchstart: INPUT_START,\n    touchmove: INPUT_MOVE,\n    touchend: INPUT_END,\n    touchcancel: INPUT_CANCEL };\n\n\n  var SINGLE_TOUCH_TARGET_EVENTS = 'touchstart';\n  var SINGLE_TOUCH_WINDOW_EVENTS = 'touchstart touchmove touchend touchcancel';\n\n  /**\n                                                                                 * Touch events input\n                                                                                 * @constructor\n                                                                                 * @extends Input\n                                                                                 */\n  function SingleTouchInput() {\n    this.evTarget = SINGLE_TOUCH_TARGET_EVENTS;\n    this.evWin = SINGLE_TOUCH_WINDOW_EVENTS;\n    this.started = false;\n\n    Input.apply(this, arguments);\n  }\n\n  inherit(SingleTouchInput, Input, {\n    handler: function TEhandler(ev) {\n      var type = SINGLE_TOUCH_INPUT_MAP[ev.type];\n\n      // should we handle the touch events?\n      if (type === INPUT_START) {\n        this.started = true;\n      }\n\n      if (!this.started) {\n        return;\n      }\n\n      var touches = normalizeSingleTouches.call(this, ev, type);\n\n      // when done, reset the started state\n      if (type & (INPUT_END | INPUT_CANCEL) && touches[0].length - touches[1].length === 0) {\n        this.started = false;\n      }\n\n      this.callback(this.manager, type, {\n        pointers: touches[0],\n        changedPointers: touches[1],\n        pointerType: INPUT_TYPE_TOUCH,\n        srcEvent: ev });\n\n    } });\n\n\n  /**\n           * @this {TouchInput}\n           * @param {Object} ev\n           * @param {Number} type flag\n           * @returns {undefined|Array} [all, changed]\n           */\n  function normalizeSingleTouches(ev, type) {\n    var all = toArray(ev.touches);\n    var changed = toArray(ev.changedTouches);\n\n    if (type & (INPUT_END | INPUT_CANCEL)) {\n      all = uniqueArray(all.concat(changed), 'identifier', true);\n    }\n\n    return [all, changed];\n  }\n\n  var TOUCH_INPUT_MAP = {\n    touchstart: INPUT_START,\n    touchmove: INPUT_MOVE,\n    touchend: INPUT_END,\n    touchcancel: INPUT_CANCEL };\n\n\n  var TOUCH_TARGET_EVENTS = 'touchstart touchmove touchend touchcancel';\n\n  /**\n                                                                          * Multi-user touch events input\n                                                                          * @constructor\n                                                                          * @extends Input\n                                                                          */\n  function TouchInput() {\n    this.evTarget = TOUCH_TARGET_EVENTS;\n    this.targetIds = {};\n\n    Input.apply(this, arguments);\n  }\n\n  inherit(TouchInput, Input, {\n    handler: function MTEhandler(ev) {\n      var type = TOUCH_INPUT_MAP[ev.type];\n      var touches = getTouches.call(this, ev, type);\n      if (!touches) {\n        return;\n      }\n\n      this.callback(this.manager, type, {\n        pointers: touches[0],\n        changedPointers: touches[1],\n        pointerType: INPUT_TYPE_TOUCH,\n        srcEvent: ev });\n\n    } });\n\n\n  /**\n           * @this {TouchInput}\n           * @param {Object} ev\n           * @param {Number} type flag\n           * @returns {undefined|Array} [all, changed]\n           */\n  function getTouches(ev, type) {\n    var allTouches = toArray(ev.touches);\n    var targetIds = this.targetIds;\n\n    // when there is only one touch, the process can be simplified\n    if (type & (INPUT_START | INPUT_MOVE) && allTouches.length === 1) {\n      targetIds[allTouches[0].identifier] = true;\n      return [allTouches, allTouches];\n    }\n\n    var i,\n    targetTouches,\n    changedTouches = toArray(ev.changedTouches),\n    changedTargetTouches = [],\n    target = this.target;\n\n    // get target touches from touches\n    targetTouches = allTouches.filter(function (touch) {\n      return hasParent(touch.target, target);\n    });\n\n    // collect touches\n    if (type === INPUT_START) {\n      i = 0;\n      while (i < targetTouches.length) {\n        targetIds[targetTouches[i].identifier] = true;\n        i++;\n      }\n    }\n\n    // filter changed touches to only contain touches that exist in the collected target ids\n    i = 0;\n    while (i < changedTouches.length) {\n      if (targetIds[changedTouches[i].identifier]) {\n        changedTargetTouches.push(changedTouches[i]);\n      }\n\n      // cleanup removed touches\n      if (type & (INPUT_END | INPUT_CANCEL)) {\n        delete targetIds[changedTouches[i].identifier];\n      }\n      i++;\n    }\n\n    if (!changedTargetTouches.length) {\n      return;\n    }\n\n    return [\n    // merge targetTouches with changedTargetTouches so it contains ALL touches, including 'end' and 'cancel'\n    uniqueArray(targetTouches.concat(changedTargetTouches), 'identifier', true),\n    changedTargetTouches];\n\n  }\n\n  /**\n     * Combined touch and mouse input\n     *\n     * Touch has a higher priority then mouse, and while touching no mouse events are allowed.\n     * This because touch devices also emit mouse events while doing a touch.\n     *\n     * @constructor\n     * @extends Input\n     */\n\n  var DEDUP_TIMEOUT = 2500;\n  var DEDUP_DISTANCE = 25;\n\n  function TouchMouseInput() {\n    Input.apply(this, arguments);\n\n    var handler = bindFn(this.handler, this);\n    this.touch = new TouchInput(this.manager, handler);\n    this.mouse = new MouseInput(this.manager, handler);\n\n    this.primaryTouch = null;\n    this.lastTouches = [];\n  }\n\n  inherit(TouchMouseInput, Input, {\n    /**\n                                     * handle mouse and touch events\n                                     * @param {Hammer} manager\n                                     * @param {String} inputEvent\n                                     * @param {Object} inputData\n                                     */\n    handler: function TMEhandler(manager, inputEvent, inputData) {\n      var isTouch = inputData.pointerType == INPUT_TYPE_TOUCH,\n      isMouse = inputData.pointerType == INPUT_TYPE_MOUSE;\n\n      if (isMouse && inputData.sourceCapabilities && inputData.sourceCapabilities.firesTouchEvents) {\n        return;\n      }\n\n      // when we're in a touch event, record touches to  de-dupe synthetic mouse event\n      if (isTouch) {\n        recordTouches.call(this, inputEvent, inputData);\n      } else if (isMouse && isSyntheticEvent.call(this, inputData)) {\n        return;\n      }\n\n      this.callback(manager, inputEvent, inputData);\n    },\n\n    /**\n        * remove the event listeners\n        */\n    destroy: function destroy() {\n      this.touch.destroy();\n      this.mouse.destroy();\n    } });\n\n\n  function recordTouches(eventType, eventData) {\n    if (eventType & INPUT_START) {\n      this.primaryTouch = eventData.changedPointers[0].identifier;\n      setLastTouch.call(this, eventData);\n    } else if (eventType & (INPUT_END | INPUT_CANCEL)) {\n      setLastTouch.call(this, eventData);\n    }\n  }\n\n  function setLastTouch(eventData) {\n    var touch = eventData.changedPointers[0];\n\n    if (touch.identifier === this.primaryTouch) {\n      var lastTouch = { x: touch.clientX, y: touch.clientY };\n      this.lastTouches.push(lastTouch);\n      var lts = this.lastTouches;\n      var removeLastTouch = function removeLastTouch() {\n        var i = lts.indexOf(lastTouch);\n        if (i > -1) {\n          lts.splice(i, 1);\n        }\n      };\n      setTimeout(removeLastTouch, DEDUP_TIMEOUT);\n    }\n  }\n\n  function isSyntheticEvent(eventData) {\n    var x = eventData.srcEvent.clientX,y = eventData.srcEvent.clientY;\n    for (var i = 0; i < this.lastTouches.length; i++) {\n      var t = this.lastTouches[i];\n      var dx = Math.abs(x - t.x),dy = Math.abs(y - t.y);\n      if (dx <= DEDUP_DISTANCE && dy <= DEDUP_DISTANCE) {\n        return true;\n      }\n    }\n    return false;\n  }\n\n  var PREFIXED_TOUCH_ACTION = prefixed(TEST_ELEMENT.style, 'touchAction');\n  var NATIVE_TOUCH_ACTION = PREFIXED_TOUCH_ACTION !== undefined;\n\n  // magical touchAction value\n  var TOUCH_ACTION_COMPUTE = 'compute';\n  var TOUCH_ACTION_AUTO = 'auto';\n  var TOUCH_ACTION_MANIPULATION = 'manipulation'; // not implemented\n  var TOUCH_ACTION_NONE = 'none';\n  var TOUCH_ACTION_PAN_X = 'pan-x';\n  var TOUCH_ACTION_PAN_Y = 'pan-y';\n  var TOUCH_ACTION_MAP = getTouchActionProps();\n\n  /**\n                                                 * Touch Action\n                                                 * sets the touchAction property or uses the js alternative\n                                                 * @param {Manager} manager\n                                                 * @param {String} value\n                                                 * @constructor\n                                                 */\n  function TouchAction(manager, value) {\n    this.manager = manager;\n    this.set(value);\n  }\n\n  TouchAction.prototype = {\n    /**\n                             * set the touchAction value on the element or enable the polyfill\n                             * @param {String} value\n                             */\n    set: function set(value) {\n      // find out the touch-action by the event handlers\n      if (value == TOUCH_ACTION_COMPUTE) {\n        value = this.compute();\n      }\n\n      if (NATIVE_TOUCH_ACTION && this.manager.element.style && TOUCH_ACTION_MAP[value]) {\n        this.manager.element.style[PREFIXED_TOUCH_ACTION] = value;\n      }\n      this.actions = value.toLowerCase().trim();\n    },\n\n    /**\n        * just re-set the touchAction value\n        */\n    update: function update() {\n      this.set(this.manager.options.touchAction);\n    },\n\n    /**\n        * compute the value for the touchAction property based on the recognizer's settings\n        * @returns {String} value\n        */\n    compute: function compute() {\n      var actions = [];\n      each(this.manager.recognizers, function (recognizer) {\n        if (boolOrFn(recognizer.options.enable, [recognizer])) {\n          actions = actions.concat(recognizer.getTouchAction());\n        }\n      });\n      return cleanTouchActions(actions.join(' '));\n    },\n\n    /**\n        * this method is called on each input cycle and provides the preventing of the browser behavior\n        * @param {Object} input\n        */\n    preventDefaults: function preventDefaults(input) {\n      var srcEvent = input.srcEvent;\n      var direction = input.offsetDirection;\n\n      // if the touch action did prevented once this session\n      if (this.manager.session.prevented) {\n        srcEvent.preventDefault();\n        return;\n      }\n\n      var actions = this.actions;\n      var hasNone = inStr(actions, TOUCH_ACTION_NONE) && !TOUCH_ACTION_MAP[TOUCH_ACTION_NONE];\n      var hasPanY = inStr(actions, TOUCH_ACTION_PAN_Y) && !TOUCH_ACTION_MAP[TOUCH_ACTION_PAN_Y];\n      var hasPanX = inStr(actions, TOUCH_ACTION_PAN_X) && !TOUCH_ACTION_MAP[TOUCH_ACTION_PAN_X];\n\n      if (hasNone) {\n        //do not prevent defaults if this is a tap gesture\n\n        var isTapPointer = input.pointers.length === 1;\n        var isTapMovement = input.distance < 2;\n        var isTapTouchTime = input.deltaTime < 250;\n\n        if (isTapPointer && isTapMovement && isTapTouchTime) {\n          return;\n        }\n      }\n\n      if (hasPanX && hasPanY) {\n        // `pan-x pan-y` means browser handles all scrolling/panning, do not prevent\n        return;\n      }\n\n      if (hasNone ||\n      hasPanY && direction & DIRECTION_HORIZONTAL ||\n      hasPanX && direction & DIRECTION_VERTICAL) {\n        return this.preventSrc(srcEvent);\n      }\n    },\n\n    /**\n        * call preventDefault to prevent the browser's default behavior (scrolling in most cases)\n        * @param {Object} srcEvent\n        */\n    preventSrc: function preventSrc(srcEvent) {\n      this.manager.session.prevented = true;\n      srcEvent.preventDefault();\n    } };\n\n\n  /**\n          * when the touchActions are collected they are not a valid value, so we need to clean things up. *\n          * @param {String} actions\n          * @returns {*}\n          */\n  function cleanTouchActions(actions) {\n    // none\n    if (inStr(actions, TOUCH_ACTION_NONE)) {\n      return TOUCH_ACTION_NONE;\n    }\n\n    var hasPanX = inStr(actions, TOUCH_ACTION_PAN_X);\n    var hasPanY = inStr(actions, TOUCH_ACTION_PAN_Y);\n\n    // if both pan-x and pan-y are set (different recognizers\n    // for different directions, e.g. horizontal pan but vertical swipe?)\n    // we need none (as otherwise with pan-x pan-y combined none of these\n    // recognizers will work, since the browser would handle all panning\n    if (hasPanX && hasPanY) {\n      return TOUCH_ACTION_NONE;\n    }\n\n    // pan-x OR pan-y\n    if (hasPanX || hasPanY) {\n      return hasPanX ? TOUCH_ACTION_PAN_X : TOUCH_ACTION_PAN_Y;\n    }\n\n    // manipulation\n    if (inStr(actions, TOUCH_ACTION_MANIPULATION)) {\n      return TOUCH_ACTION_MANIPULATION;\n    }\n\n    return TOUCH_ACTION_AUTO;\n  }\n\n  function getTouchActionProps() {\n    if (!NATIVE_TOUCH_ACTION) {\n      return false;\n    }\n    var touchMap = {};\n    var cssSupports = window.CSS && window.CSS.supports;\n    ['auto', 'manipulation', 'pan-y', 'pan-x', 'pan-x pan-y', 'none'].forEach(function (val) {\n\n      // If css.supports is not supported but there is native touch-action assume it supports\n      // all values. This is the case for IE 10 and 11.\n      touchMap[val] = cssSupports ? window.CSS.supports('touch-action', val) : true;\n    });\n    return touchMap;\n  }\n\n  /**\n     * Recognizer flow explained; *\n     * All recognizers have the initial state of POSSIBLE when a input session starts.\n     * The definition of a input session is from the first input until the last input, with all it's movement in it. *\n     * Example session for mouse-input: mousedown -> mousemove -> mouseup\n     *\n     * On each recognizing cycle (see Manager.recognize) the .recognize() method is executed\n     * which determines with state it should be.\n     *\n     * If the recognizer has the state FAILED, CANCELLED or RECOGNIZED (equals ENDED), it is reset to\n     * POSSIBLE to give it another change on the next cycle.\n     *\n     *               Possible\n     *                  |\n     *            +-----+---------------+\n     *            |                     |\n     *      +-----+-----+               |\n     *      |           |               |\n     *   Failed      Cancelled          |\n     *                          +-------+------+\n     *                          |              |\n     *                      Recognized       Began\n     *                                         |\n     *                                      Changed\n     *                                         |\n     *                                  Ended/Recognized\n     */\n  var STATE_POSSIBLE = 1;\n  var STATE_BEGAN = 2;\n  var STATE_CHANGED = 4;\n  var STATE_ENDED = 8;\n  var STATE_RECOGNIZED = STATE_ENDED;\n  var STATE_CANCELLED = 16;\n  var STATE_FAILED = 32;\n\n  /**\n                          * Recognizer\n                          * Every recognizer needs to extend from this class.\n                          * @constructor\n                          * @param {Object} options\n                          */\n  function Recognizer(options) {\n    this.options = assign({}, this.defaults, options || {});\n\n    this.id = uniqueId();\n\n    this.manager = null;\n\n    // default is enable true\n    this.options.enable = ifUndefined(this.options.enable, true);\n\n    this.state = STATE_POSSIBLE;\n\n    this.simultaneous = {};\n    this.requireFail = [];\n  }\n\n  Recognizer.prototype = {\n    /**\n                            * @virtual\n                            * @type {Object}\n                            */\n    defaults: {},\n\n    /**\n                   * set options\n                   * @param {Object} options\n                   * @return {Recognizer}\n                   */\n    set: function set(options) {\n      assign(this.options, options);\n\n      // also update the touchAction, in case something changed about the directions/enabled state\n      this.manager && this.manager.touchAction.update();\n      return this;\n    },\n\n    /**\n        * recognize simultaneous with an other recognizer.\n        * @param {Recognizer} otherRecognizer\n        * @returns {Recognizer} this\n        */\n    recognizeWith: function recognizeWith(otherRecognizer) {\n      if (invokeArrayArg(otherRecognizer, 'recognizeWith', this)) {\n        return this;\n      }\n\n      var simultaneous = this.simultaneous;\n      otherRecognizer = getRecognizerByNameIfManager(otherRecognizer, this);\n      if (!simultaneous[otherRecognizer.id]) {\n        simultaneous[otherRecognizer.id] = otherRecognizer;\n        otherRecognizer.recognizeWith(this);\n      }\n      return this;\n    },\n\n    /**\n        * drop the simultaneous link. it doesnt remove the link on the other recognizer.\n        * @param {Recognizer} otherRecognizer\n        * @returns {Recognizer} this\n        */\n    dropRecognizeWith: function dropRecognizeWith(otherRecognizer) {\n      if (invokeArrayArg(otherRecognizer, 'dropRecognizeWith', this)) {\n        return this;\n      }\n\n      otherRecognizer = getRecognizerByNameIfManager(otherRecognizer, this);\n      delete this.simultaneous[otherRecognizer.id];\n      return this;\n    },\n\n    /**\n        * recognizer can only run when an other is failing\n        * @param {Recognizer} otherRecognizer\n        * @returns {Recognizer} this\n        */\n    requireFailure: function requireFailure(otherRecognizer) {\n      if (invokeArrayArg(otherRecognizer, 'requireFailure', this)) {\n        return this;\n      }\n\n      var requireFail = this.requireFail;\n      otherRecognizer = getRecognizerByNameIfManager(otherRecognizer, this);\n      if (inArray(requireFail, otherRecognizer) === -1) {\n        requireFail.push(otherRecognizer);\n        otherRecognizer.requireFailure(this);\n      }\n      return this;\n    },\n\n    /**\n        * drop the requireFailure link. it does not remove the link on the other recognizer.\n        * @param {Recognizer} otherRecognizer\n        * @returns {Recognizer} this\n        */\n    dropRequireFailure: function dropRequireFailure(otherRecognizer) {\n      if (invokeArrayArg(otherRecognizer, 'dropRequireFailure', this)) {\n        return this;\n      }\n\n      otherRecognizer = getRecognizerByNameIfManager(otherRecognizer, this);\n      var index = inArray(this.requireFail, otherRecognizer);\n      if (index > -1) {\n        this.requireFail.splice(index, 1);\n      }\n      return this;\n    },\n\n    /**\n        * has require failures boolean\n        * @returns {boolean}\n        */\n    hasRequireFailures: function hasRequireFailures() {\n      return this.requireFail.length > 0;\n    },\n\n    /**\n        * if the recognizer can recognize simultaneous with an other recognizer\n        * @param {Recognizer} otherRecognizer\n        * @returns {Boolean}\n        */\n    canRecognizeWith: function canRecognizeWith(otherRecognizer) {\n      return !!this.simultaneous[otherRecognizer.id];\n    },\n\n    /**\n        * You should use `tryEmit` instead of `emit` directly to check\n        * that all the needed recognizers has failed before emitting.\n        * @param {Object} input\n        */\n    emit: function emit(input) {\n      var self = this;\n      var state = this.state;\n\n      function emit(event) {\n        self.manager.emit(event, input);\n      }\n\n      // 'panstart' and 'panmove'\n      if (state < STATE_ENDED) {\n        emit(self.options.event + stateStr(state));\n      }\n\n      emit(self.options.event); // simple 'eventName' events\n\n      if (input.additionalEvent) {// additional event(panleft, panright, pinchin, pinchout...)\n        emit(input.additionalEvent);\n      }\n\n      // panend and pancancel\n      if (state >= STATE_ENDED) {\n        emit(self.options.event + stateStr(state));\n      }\n    },\n\n    /**\n        * Check that all the require failure recognizers has failed,\n        * if true, it emits a gesture event,\n        * otherwise, setup the state to FAILED.\n        * @param {Object} input\n        */\n    tryEmit: function tryEmit(input) {\n      if (this.canEmit()) {\n        return this.emit(input);\n      }\n      // it's failing anyway\n      this.state = STATE_FAILED;\n    },\n\n    /**\n        * can we emit?\n        * @returns {boolean}\n        */\n    canEmit: function canEmit() {\n      var i = 0;\n      while (i < this.requireFail.length) {\n        if (!(this.requireFail[i].state & (STATE_FAILED | STATE_POSSIBLE))) {\n          return false;\n        }\n        i++;\n      }\n      return true;\n    },\n\n    /**\n        * update the recognizer\n        * @param {Object} inputData\n        */\n    recognize: function recognize(inputData) {\n      // make a new copy of the inputData\n      // so we can change the inputData without messing up the other recognizers\n      var inputDataClone = assign({}, inputData);\n\n      // is is enabled and allow recognizing?\n      if (!boolOrFn(this.options.enable, [this, inputDataClone])) {\n        this.reset();\n        this.state = STATE_FAILED;\n        return;\n      }\n\n      // reset when we've reached the end\n      if (this.state & (STATE_RECOGNIZED | STATE_CANCELLED | STATE_FAILED)) {\n        this.state = STATE_POSSIBLE;\n      }\n\n      this.state = this.process(inputDataClone);\n\n      // the recognizer has recognized a gesture\n      // so trigger an event\n      if (this.state & (STATE_BEGAN | STATE_CHANGED | STATE_ENDED | STATE_CANCELLED)) {\n        this.tryEmit(inputDataClone);\n      }\n    },\n\n    /**\n        * return the state of the recognizer\n        * the actual recognizing happens in this method\n        * @virtual\n        * @param {Object} inputData\n        * @returns {Const} STATE\n        */\n    process: function process(inputData) {}, // jshint ignore:line\n\n    /**\n     * return the preferred touch-action\n     * @virtual\n     * @returns {Array}\n     */\n    getTouchAction: function getTouchAction() {},\n\n    /**\n                                                   * called when the gesture isn't allowed to recognize\n                                                   * like when another is being recognized or it is disabled\n                                                   * @virtual\n                                                   */\n    reset: function reset() {} };\n\n\n  /**\n                                   * get a usable string, used as event postfix\n                                   * @param {Const} state\n                                   * @returns {String} state\n                                   */\n  function stateStr(state) {\n    if (state & STATE_CANCELLED) {\n      return 'cancel';\n    } else if (state & STATE_ENDED) {\n      return 'end';\n    } else if (state & STATE_CHANGED) {\n      return 'move';\n    } else if (state & STATE_BEGAN) {\n      return 'start';\n    }\n    return '';\n  }\n\n  /**\n     * direction cons to string\n     * @param {Const} direction\n     * @returns {String}\n     */\n  function directionStr(direction) {\n    if (direction == DIRECTION_DOWN) {\n      return 'down';\n    } else if (direction == DIRECTION_UP) {\n      return 'up';\n    } else if (direction == DIRECTION_LEFT) {\n      return 'left';\n    } else if (direction == DIRECTION_RIGHT) {\n      return 'right';\n    }\n    return '';\n  }\n\n  /**\n     * get a recognizer by name if it is bound to a manager\n     * @param {Recognizer|String} otherRecognizer\n     * @param {Recognizer} recognizer\n     * @returns {Recognizer}\n     */\n  function getRecognizerByNameIfManager(otherRecognizer, recognizer) {\n    var manager = recognizer.manager;\n    if (manager) {\n      return manager.get(otherRecognizer);\n    }\n    return otherRecognizer;\n  }\n\n  /**\n     * This recognizer is just used as a base for the simple attribute recognizers.\n     * @constructor\n     * @extends Recognizer\n     */\n  function AttrRecognizer() {\n    Recognizer.apply(this, arguments);\n  }\n\n  inherit(AttrRecognizer, Recognizer, {\n    /**\n                                         * @namespace\n                                         * @memberof AttrRecognizer\n                                         */\n    defaults: {\n      /**\n                 * @type {Number}\n                 * @default 1\n                 */\n      pointers: 1 },\n\n\n    /**\n                      * Used to check if it the recognizer receives valid input, like input.distance > 10.\n                      * @memberof AttrRecognizer\n                      * @param {Object} input\n                      * @returns {Boolean} recognized\n                      */\n    attrTest: function attrTest(input) {\n      var optionPointers = this.options.pointers;\n      return optionPointers === 0 || input.pointers.length === optionPointers;\n    },\n\n    /**\n        * Process the input and return the state for the recognizer\n        * @memberof AttrRecognizer\n        * @param {Object} input\n        * @returns {*} State\n        */\n    process: function process(input) {\n      var state = this.state;\n      var eventType = input.eventType;\n\n      var isRecognized = state & (STATE_BEGAN | STATE_CHANGED);\n      var isValid = this.attrTest(input);\n\n      // on cancel input and we've recognized before, return STATE_CANCELLED\n      if (isRecognized && (eventType & INPUT_CANCEL || !isValid)) {\n        return state | STATE_CANCELLED;\n      } else if (isRecognized || isValid) {\n        if (eventType & INPUT_END) {\n          return state | STATE_ENDED;\n        } else if (!(state & STATE_BEGAN)) {\n          return STATE_BEGAN;\n        }\n        return state | STATE_CHANGED;\n      }\n      return STATE_FAILED;\n    } });\n\n\n  /**\n           * Pan\n           * Recognized when the pointer is down and moved in the allowed direction.\n           * @constructor\n           * @extends AttrRecognizer\n           */\n  function PanRecognizer() {\n    AttrRecognizer.apply(this, arguments);\n\n    this.pX = null;\n    this.pY = null;\n  }\n\n  inherit(PanRecognizer, AttrRecognizer, {\n    /**\n                                            * @namespace\n                                            * @memberof PanRecognizer\n                                            */\n    defaults: {\n      event: 'pan',\n      threshold: 10,\n      pointers: 1,\n      direction: DIRECTION_ALL },\n\n\n    getTouchAction: function getTouchAction() {\n      var direction = this.options.direction;\n      var actions = [];\n      if (direction & DIRECTION_HORIZONTAL) {\n        actions.push(TOUCH_ACTION_PAN_Y);\n      }\n      if (direction & DIRECTION_VERTICAL) {\n        actions.push(TOUCH_ACTION_PAN_X);\n      }\n      return actions;\n    },\n\n    directionTest: function directionTest(input) {\n      var options = this.options;\n      var hasMoved = true;\n      var distance = input.distance;\n      var direction = input.direction;\n      var x = input.deltaX;\n      var y = input.deltaY;\n\n      // lock to axis?\n      if (!(direction & options.direction)) {\n        if (options.direction & DIRECTION_HORIZONTAL) {\n          direction = x === 0 ? DIRECTION_NONE : x < 0 ? DIRECTION_LEFT : DIRECTION_RIGHT;\n          hasMoved = x != this.pX;\n          distance = Math.abs(input.deltaX);\n        } else {\n          direction = y === 0 ? DIRECTION_NONE : y < 0 ? DIRECTION_UP : DIRECTION_DOWN;\n          hasMoved = y != this.pY;\n          distance = Math.abs(input.deltaY);\n        }\n      }\n      input.direction = direction;\n      return hasMoved && distance > options.threshold && direction & options.direction;\n    },\n\n    attrTest: function attrTest(input) {\n      return AttrRecognizer.prototype.attrTest.call(this, input) && (\n      this.state & STATE_BEGAN || !(this.state & STATE_BEGAN) && this.directionTest(input));\n    },\n\n    emit: function emit(input) {\n\n      this.pX = input.deltaX;\n      this.pY = input.deltaY;\n\n      var direction = directionStr(input.direction);\n\n      if (direction) {\n        input.additionalEvent = this.options.event + direction;\n      }\n      this._super.emit.call(this, input);\n    } });\n\n\n  /**\n           * Pinch\n           * Recognized when two or more pointers are moving toward (zoom-in) or away from each other (zoom-out).\n           * @constructor\n           * @extends AttrRecognizer\n           */\n  function PinchRecognizer() {\n    AttrRecognizer.apply(this, arguments);\n  }\n\n  inherit(PinchRecognizer, AttrRecognizer, {\n    /**\n                                              * @namespace\n                                              * @memberof PinchRecognizer\n                                              */\n    defaults: {\n      event: 'pinch',\n      threshold: 0,\n      pointers: 2 },\n\n\n    getTouchAction: function getTouchAction() {\n      return [TOUCH_ACTION_NONE];\n    },\n\n    attrTest: function attrTest(input) {\n      return this._super.attrTest.call(this, input) && (\n      Math.abs(input.scale - 1) > this.options.threshold || this.state & STATE_BEGAN);\n    },\n\n    emit: function emit(input) {\n      if (input.scale !== 1) {\n        var inOut = input.scale < 1 ? 'in' : 'out';\n        input.additionalEvent = this.options.event + inOut;\n      }\n      this._super.emit.call(this, input);\n    } });\n\n\n  /**\n           * Press\n           * Recognized when the pointer is down for x ms without any movement.\n           * @constructor\n           * @extends Recognizer\n           */\n  function PressRecognizer() {\n    Recognizer.apply(this, arguments);\n\n    this._timer = null;\n    this._input = null;\n  }\n\n  inherit(PressRecognizer, Recognizer, {\n    /**\n                                          * @namespace\n                                          * @memberof PressRecognizer\n                                          */\n    defaults: {\n      event: 'press',\n      pointers: 1,\n      time: 251, // minimal time of the pointer to be pressed\n      threshold: 9 // a minimal movement is ok, but keep it low\n    },\n\n    getTouchAction: function getTouchAction() {\n      return [TOUCH_ACTION_AUTO];\n    },\n\n    process: function process(input) {\n      var options = this.options;\n      var validPointers = input.pointers.length === options.pointers;\n      var validMovement = input.distance < options.threshold;\n      var validTime = input.deltaTime > options.time;\n\n      this._input = input;\n\n      // we only allow little movement\n      // and we've reached an end event, so a tap is possible\n      if (!validMovement || !validPointers || input.eventType & (INPUT_END | INPUT_CANCEL) && !validTime) {\n        this.reset();\n      } else if (input.eventType & INPUT_START) {\n        this.reset();\n        this._timer = setTimeoutContext(function () {\n          this.state = STATE_RECOGNIZED;\n          this.tryEmit();\n        }, options.time, this);\n      } else if (input.eventType & INPUT_END) {\n        return STATE_RECOGNIZED;\n      }\n      return STATE_FAILED;\n    },\n\n    reset: function reset() {\n      clearTimeout(this._timer);\n    },\n\n    emit: function emit(input) {\n      if (this.state !== STATE_RECOGNIZED) {\n        return;\n      }\n\n      if (input && input.eventType & INPUT_END) {\n        this.manager.emit(this.options.event + 'up', input);\n      } else {\n        this._input.timeStamp = now();\n        this.manager.emit(this.options.event, this._input);\n      }\n    } });\n\n\n  /**\n           * Rotate\n           * Recognized when two or more pointer are moving in a circular motion.\n           * @constructor\n           * @extends AttrRecognizer\n           */\n  function RotateRecognizer() {\n    AttrRecognizer.apply(this, arguments);\n  }\n\n  inherit(RotateRecognizer, AttrRecognizer, {\n    /**\n                                               * @namespace\n                                               * @memberof RotateRecognizer\n                                               */\n    defaults: {\n      event: 'rotate',\n      threshold: 0,\n      pointers: 2 },\n\n\n    getTouchAction: function getTouchAction() {\n      return [TOUCH_ACTION_NONE];\n    },\n\n    attrTest: function attrTest(input) {\n      return this._super.attrTest.call(this, input) && (\n      Math.abs(input.rotation) > this.options.threshold || this.state & STATE_BEGAN);\n    } });\n\n\n  /**\n           * Swipe\n           * Recognized when the pointer is moving fast (velocity), with enough distance in the allowed direction.\n           * @constructor\n           * @extends AttrRecognizer\n           */\n  function SwipeRecognizer() {\n    AttrRecognizer.apply(this, arguments);\n  }\n\n  inherit(SwipeRecognizer, AttrRecognizer, {\n    /**\n                                              * @namespace\n                                              * @memberof SwipeRecognizer\n                                              */\n    defaults: {\n      event: 'swipe',\n      threshold: 10,\n      velocity: 0.3,\n      direction: DIRECTION_HORIZONTAL | DIRECTION_VERTICAL,\n      pointers: 1 },\n\n\n    getTouchAction: function getTouchAction() {\n      return PanRecognizer.prototype.getTouchAction.call(this);\n    },\n\n    attrTest: function attrTest(input) {\n      var direction = this.options.direction;\n      var velocity;\n\n      if (direction & (DIRECTION_HORIZONTAL | DIRECTION_VERTICAL)) {\n        velocity = input.overallVelocity;\n      } else if (direction & DIRECTION_HORIZONTAL) {\n        velocity = input.overallVelocityX;\n      } else if (direction & DIRECTION_VERTICAL) {\n        velocity = input.overallVelocityY;\n      }\n\n      return this._super.attrTest.call(this, input) &&\n      direction & input.offsetDirection &&\n      input.distance > this.options.threshold &&\n      input.maxPointers == this.options.pointers &&\n      abs(velocity) > this.options.velocity && input.eventType & INPUT_END;\n    },\n\n    emit: function emit(input) {\n      var direction = directionStr(input.offsetDirection);\n      if (direction) {\n        this.manager.emit(this.options.event + direction, input);\n      }\n\n      this.manager.emit(this.options.event, input);\n    } });\n\n\n  /**\n           * A tap is ecognized when the pointer is doing a small tap/click. Multiple taps are recognized if they occur\n           * between the given interval and position. The delay option can be used to recognize multi-taps without firing\n           * a single tap.\n           *\n           * The eventData from the emitted event contains the property `tapCount`, which contains the amount of\n           * multi-taps being recognized.\n           * @constructor\n           * @extends Recognizer\n           */\n  function TapRecognizer() {\n    Recognizer.apply(this, arguments);\n\n    // previous time and center,\n    // used for tap counting\n    this.pTime = false;\n    this.pCenter = false;\n\n    this._timer = null;\n    this._input = null;\n    this.count = 0;\n  }\n\n  inherit(TapRecognizer, Recognizer, {\n    /**\n                                        * @namespace\n                                        * @memberof PinchRecognizer\n                                        */\n    defaults: {\n      event: 'tap',\n      pointers: 1,\n      taps: 1,\n      interval: 300, // max time between the multi-tap taps\n      time: 250, // max time of the pointer to be down (like finger on the screen)\n      threshold: 9, // a minimal movement is ok, but keep it low\n      posThreshold: 10 // a multi-tap can be a bit off the initial position\n    },\n\n    getTouchAction: function getTouchAction() {\n      return [TOUCH_ACTION_MANIPULATION];\n    },\n\n    process: function process(input) {\n      var options = this.options;\n\n      var validPointers = input.pointers.length === options.pointers;\n      var validMovement = input.distance < options.threshold;\n      var validTouchTime = input.deltaTime < options.time;\n\n      this.reset();\n\n      if (input.eventType & INPUT_START && this.count === 0) {\n        return this.failTimeout();\n      }\n\n      // we only allow little movement\n      // and we've reached an end event, so a tap is possible\n      if (validMovement && validTouchTime && validPointers) {\n        if (input.eventType != INPUT_END) {\n          return this.failTimeout();\n        }\n\n        var validInterval = this.pTime ? input.timeStamp - this.pTime < options.interval : true;\n        var validMultiTap = !this.pCenter || getDistance(this.pCenter, input.center) < options.posThreshold;\n\n        this.pTime = input.timeStamp;\n        this.pCenter = input.center;\n\n        if (!validMultiTap || !validInterval) {\n          this.count = 1;\n        } else {\n          this.count += 1;\n        }\n\n        this._input = input;\n\n        // if tap count matches we have recognized it,\n        // else it has began recognizing...\n        var tapCount = this.count % options.taps;\n        if (tapCount === 0) {\n          // no failing requirements, immediately trigger the tap event\n          // or wait as long as the multitap interval to trigger\n          if (!this.hasRequireFailures()) {\n            return STATE_RECOGNIZED;\n          } else {\n            this._timer = setTimeoutContext(function () {\n              this.state = STATE_RECOGNIZED;\n              this.tryEmit();\n            }, options.interval, this);\n            return STATE_BEGAN;\n          }\n        }\n      }\n      return STATE_FAILED;\n    },\n\n    failTimeout: function failTimeout() {\n      this._timer = setTimeoutContext(function () {\n        this.state = STATE_FAILED;\n      }, this.options.interval, this);\n      return STATE_FAILED;\n    },\n\n    reset: function reset() {\n      clearTimeout(this._timer);\n    },\n\n    emit: function emit() {\n      if (this.state == STATE_RECOGNIZED) {\n        this._input.tapCount = this.count;\n        this.manager.emit(this.options.event, this._input);\n      }\n    } });\n\n\n  /**\n           * Simple way to create a manager with a default set of recognizers.\n           * @param {HTMLElement} element\n           * @param {Object} [options]\n           * @constructor\n           */\n  function Hammer(element, options) {\n    options = options || {};\n    options.recognizers = ifUndefined(options.recognizers, Hammer.defaults.preset);\n    return new Manager(element, options);\n  }\n\n  /**\n     * @const {string}\n     */\n  Hammer.VERSION = '2.0.8';\n\n  /**\n                             * default settings\n                             * @namespace\n                             */\n  Hammer.defaults = {\n    /**\n                       * set if DOM events are being triggered.\n                       * But this is slower and unused by simple implementations, so disabled by default.\n                       * @type {Boolean}\n                       * @default false\n                       */\n    domEvents: false,\n\n    /**\n                       * The value for the touchAction property/fallback.\n                       * When set to `compute` it will magically set the correct value based on the added recognizers.\n                       * @type {String}\n                       * @default compute\n                       */\n    touchAction: TOUCH_ACTION_COMPUTE,\n\n    /**\n                                        * @type {Boolean}\n                                        * @default true\n                                        */\n    enable: true,\n\n    /**\n                   * @type {Boolean}\n                   * @default true\n                   */\n    handlePointerEventMouse: true,\n\n    /**\n                                    * EXPERIMENTAL FEATURE -- can be removed/changed\n                                    * Change the parent input target element.\n                                    * If Null, then it is being set the to main element.\n                                    * @type {Null|EventTarget}\n                                    * @default null\n                                    */\n    inputTarget: null,\n\n    /**\n                        * force an input class\n                        * @type {Null|Function}\n                        * @default null\n                        */\n    inputClass: null,\n\n    /**\n                       * Default recognizer setup when calling `Hammer()`\n                       * When creating a new Manager these will be skipped.\n                       * @type {Array}\n                       */\n    preset: [\n    // RecognizerClass, options, [recognizeWith, ...], [requireFailure, ...]\n    [RotateRecognizer, { enable: false }],\n    [PinchRecognizer, { enable: false }, ['rotate']],\n    [SwipeRecognizer, { direction: DIRECTION_HORIZONTAL }],\n    [PanRecognizer, { direction: DIRECTION_HORIZONTAL }, ['swipe']],\n    [TapRecognizer],\n    [TapRecognizer, { event: 'doubletap', taps: 2 }, ['tap']],\n    [PressRecognizer]],\n\n\n    /**\n                         * Some CSS properties can be used to improve the working of Hammer.\n                         * Add them to this method and they will be set when creating a new Manager.\n                         * @namespace\n                         */\n    cssProps: {\n      /**\n                 * Disables text selection to improve the dragging gesture. Mainly for desktop browsers.\n                 * @type {String}\n                 * @default 'none'\n                 */\n      userSelect: 'none',\n\n      /**\n                           * Disable the Windows Phone grippers when pressing an element.\n                           * @type {String}\n                           * @default 'none'\n                           */\n      touchSelect: 'none',\n\n      /**\n                            * Disables the default callout shown when you touch and hold a touch target.\n                            * On iOS, when you touch and hold a touch target such as a link, Safari displays\n                            * a callout containing information about the link. This property allows you to disable that callout.\n                            * @type {String}\n                            * @default 'none'\n                            */\n      touchCallout: 'none',\n\n      /**\n                             * Specifies whether zooming is enabled. Used by IE10>\n                             * @type {String}\n                             * @default 'none'\n                             */\n      contentZooming: 'none',\n\n      /**\n                               * Specifies that an entire element should be draggable instead of its contents. Mainly for desktop browsers.\n                               * @type {String}\n                               * @default 'none'\n                               */\n      userDrag: 'none',\n\n      /**\n                         * Overrides the highlight color shown when the user taps a link or a JavaScript\n                         * clickable element in iOS. This property obeys the alpha value, if specified.\n                         * @type {String}\n                         * @default 'rgba(0,0,0,0)'\n                         */\n      tapHighlightColor: 'rgba(0,0,0,0)' } };\n\n\n\n  var STOP = 1;\n  var FORCED_STOP = 2;\n\n  /**\n                        * Manager\n                        * @param {HTMLElement} element\n                        * @param {Object} [options]\n                        * @constructor\n                        */\n  function Manager(element, options) {\n    this.options = assign({}, Hammer.defaults, options || {});\n\n    this.options.inputTarget = this.options.inputTarget || element;\n\n    this.handlers = {};\n    this.session = {};\n    this.recognizers = [];\n    this.oldCssProps = {};\n\n    this.element = element;\n    this.input = createInputInstance(this);\n    this.touchAction = new TouchAction(this, this.options.touchAction);\n\n    toggleCssProps(this, true);\n\n    each(this.options.recognizers, function (item) {\n      var recognizer = this.add(new item[0](item[1]));\n      item[2] && recognizer.recognizeWith(item[2]);\n      item[3] && recognizer.requireFailure(item[3]);\n    }, this);\n  }\n\n  Manager.prototype = {\n    /**\n                         * set options\n                         * @param {Object} options\n                         * @returns {Manager}\n                         */\n    set: function set(options) {\n      assign(this.options, options);\n\n      // Options that need a little more setup\n      if (options.touchAction) {\n        this.touchAction.update();\n      }\n      if (options.inputTarget) {\n        // Clean up existing event listeners and reinitialize\n        this.input.destroy();\n        this.input.target = options.inputTarget;\n        this.input.init();\n      }\n      return this;\n    },\n\n    /**\n        * stop recognizing for this session.\n        * This session will be discarded, when a new [input]start event is fired.\n        * When forced, the recognizer cycle is stopped immediately.\n        * @param {Boolean} [force]\n        */\n    stop: function stop(force) {\n      this.session.stopped = force ? FORCED_STOP : STOP;\n    },\n\n    /**\n        * run the recognizers!\n        * called by the inputHandler function on every movement of the pointers (touches)\n        * it walks through all the recognizers and tries to detect the gesture that is being made\n        * @param {Object} inputData\n        */\n    recognize: function recognize(inputData) {\n      var session = this.session;\n      if (session.stopped) {\n        return;\n      }\n\n      // run the touch-action polyfill\n      this.touchAction.preventDefaults(inputData);\n\n      var recognizer;\n      var recognizers = this.recognizers;\n\n      // this holds the recognizer that is being recognized.\n      // so the recognizer's state needs to be BEGAN, CHANGED, ENDED or RECOGNIZED\n      // if no recognizer is detecting a thing, it is set to `null`\n      var curRecognizer = session.curRecognizer;\n\n      // reset when the last recognizer is recognized\n      // or when we're in a new session\n      if (!curRecognizer || curRecognizer && curRecognizer.state & STATE_RECOGNIZED) {\n        curRecognizer = session.curRecognizer = null;\n      }\n\n      var i = 0;\n      while (i < recognizers.length) {\n        recognizer = recognizers[i];\n\n        // find out if we are allowed try to recognize the input for this one.\n        // 1.   allow if the session is NOT forced stopped (see the .stop() method)\n        // 2.   allow if we still haven't recognized a gesture in this session, or the this recognizer is the one\n        //      that is being recognized.\n        // 3.   allow if the recognizer is allowed to run simultaneous with the current recognized recognizer.\n        //      this can be setup with the `recognizeWith()` method on the recognizer.\n        if (session.stopped !== FORCED_STOP && ( // 1\n        !curRecognizer || recognizer == curRecognizer || // 2\n        recognizer.canRecognizeWith(curRecognizer))) {// 3\n          recognizer.recognize(inputData);\n        } else {\n          recognizer.reset();\n        }\n\n        // if the recognizer has been recognizing the input as a valid gesture, we want to store this one as the\n        // current active recognizer. but only if we don't already have an active recognizer\n        if (!curRecognizer && recognizer.state & (STATE_BEGAN | STATE_CHANGED | STATE_ENDED)) {\n          curRecognizer = session.curRecognizer = recognizer;\n        }\n        i++;\n      }\n    },\n\n    /**\n        * get a recognizer by its event name.\n        * @param {Recognizer|String} recognizer\n        * @returns {Recognizer|Null}\n        */\n    get: function get(recognizer) {\n      if (recognizer instanceof Recognizer) {\n        return recognizer;\n      }\n\n      var recognizers = this.recognizers;\n      for (var i = 0; i < recognizers.length; i++) {\n        if (recognizers[i].options.event == recognizer) {\n          return recognizers[i];\n        }\n      }\n      return null;\n    },\n\n    /**\n        * add a recognizer to the manager\n        * existing recognizers with the same event name will be removed\n        * @param {Recognizer} recognizer\n        * @returns {Recognizer|Manager}\n        */\n    add: function add(recognizer) {\n      if (invokeArrayArg(recognizer, 'add', this)) {\n        return this;\n      }\n\n      // remove existing\n      var existing = this.get(recognizer.options.event);\n      if (existing) {\n        this.remove(existing);\n      }\n\n      this.recognizers.push(recognizer);\n      recognizer.manager = this;\n\n      this.touchAction.update();\n      return recognizer;\n    },\n\n    /**\n        * remove a recognizer by name or instance\n        * @param {Recognizer|String} recognizer\n        * @returns {Manager}\n        */\n    remove: function remove(recognizer) {\n      if (invokeArrayArg(recognizer, 'remove', this)) {\n        return this;\n      }\n\n      recognizer = this.get(recognizer);\n\n      // let's make sure this recognizer exists\n      if (recognizer) {\n        var recognizers = this.recognizers;\n        var index = inArray(recognizers, recognizer);\n\n        if (index !== -1) {\n          recognizers.splice(index, 1);\n          this.touchAction.update();\n        }\n      }\n\n      return this;\n    },\n\n    /**\n        * bind event\n        * @param {String} events\n        * @param {Function} handler\n        * @returns {EventEmitter} this\n        */\n    on: function on(events, handler) {\n      if (events === undefined) {\n        return;\n      }\n      if (handler === undefined) {\n        return;\n      }\n\n      var handlers = this.handlers;\n      each(splitStr(events), function (event) {\n        handlers[event] = handlers[event] || [];\n        handlers[event].push(handler);\n      });\n      return this;\n    },\n\n    /**\n        * unbind event, leave emit blank to remove all handlers\n        * @param {String} events\n        * @param {Function} [handler]\n        * @returns {EventEmitter} this\n        */\n    off: function off(events, handler) {\n      if (events === undefined) {\n        return;\n      }\n\n      var handlers = this.handlers;\n      each(splitStr(events), function (event) {\n        if (!handler) {\n          delete handlers[event];\n        } else {\n          handlers[event] && handlers[event].splice(inArray(handlers[event], handler), 1);\n        }\n      });\n      return this;\n    },\n\n    /**\n        * emit event to the listeners\n        * @param {String} event\n        * @param {Object} data\n        */\n    emit: function emit(event, data) {\n      // we also want to trigger dom events\n      if (this.options.domEvents) {\n        triggerDomEvent(event, data);\n      }\n\n      // no handlers, so skip it all\n      var handlers = this.handlers[event] && this.handlers[event].slice();\n      if (!handlers || !handlers.length) {\n        return;\n      }\n\n      data.type = event;\n      data.preventDefault = function () {\n        data.srcEvent.preventDefault();\n      };\n\n      data.stopPropagation = function () {\n        data.srcEvent.stopPropagation();\n      };\n\n      var i = 0;\n      while (i < handlers.length) {\n        handlers[i](data);\n        i++;\n      }\n    },\n\n    /**\n        * destroy the manager and unbinds all events\n        * it doesn't unbind dom events, that is the user own responsibility\n        */\n    destroy: function destroy() {\n      this.element && toggleCssProps(this, false);\n\n      this.handlers = {};\n      this.session = {};\n      this.input.destroy();\n      this.element = null;\n    } };\n\n\n  /**\n          * add/remove the css properties as defined in manager.options.cssProps\n          * @param {Manager} manager\n          * @param {Boolean} add\n          */\n  function toggleCssProps(manager, add) {\n    var element = manager.element;\n    if (!element.style) {\n      return;\n    }\n    var prop;\n    each(manager.options.cssProps, function (value, name) {\n      prop = prefixed(element.style, name);\n      if (add) {\n        manager.oldCssProps[prop] = element.style[prop];\n        element.style[prop] = value;\n      } else {\n        element.style[prop] = manager.oldCssProps[prop] || '';\n      }\n    });\n    if (!add) {\n      manager.oldCssProps = {};\n    }\n  }\n\n  /**\n     * trigger dom event\n     * @param {String} event\n     * @param {Object} data\n     */\n  function triggerDomEvent(event, data) {\n    var gestureEvent = document.createEvent('Event');\n    gestureEvent.initEvent(event, true, true);\n    gestureEvent.gesture = data;\n    data.target.dispatchEvent(gestureEvent);\n  }\n\n  assign(Hammer, {\n    INPUT_START: INPUT_START,\n    INPUT_MOVE: INPUT_MOVE,\n    INPUT_END: INPUT_END,\n    INPUT_CANCEL: INPUT_CANCEL,\n\n    STATE_POSSIBLE: STATE_POSSIBLE,\n    STATE_BEGAN: STATE_BEGAN,\n    STATE_CHANGED: STATE_CHANGED,\n    STATE_ENDED: STATE_ENDED,\n    STATE_RECOGNIZED: STATE_RECOGNIZED,\n    STATE_CANCELLED: STATE_CANCELLED,\n    STATE_FAILED: STATE_FAILED,\n\n    DIRECTION_NONE: DIRECTION_NONE,\n    DIRECTION_LEFT: DIRECTION_LEFT,\n    DIRECTION_RIGHT: DIRECTION_RIGHT,\n    DIRECTION_UP: DIRECTION_UP,\n    DIRECTION_DOWN: DIRECTION_DOWN,\n    DIRECTION_HORIZONTAL: DIRECTION_HORIZONTAL,\n    DIRECTION_VERTICAL: DIRECTION_VERTICAL,\n    DIRECTION_ALL: DIRECTION_ALL,\n\n    Manager: Manager,\n    Input: Input,\n    TouchAction: TouchAction,\n\n    TouchInput: TouchInput,\n    MouseInput: MouseInput,\n    PointerEventInput: PointerEventInput,\n    TouchMouseInput: TouchMouseInput,\n    SingleTouchInput: SingleTouchInput,\n\n    Recognizer: Recognizer,\n    AttrRecognizer: AttrRecognizer,\n    Tap: TapRecognizer,\n    Pan: PanRecognizer,\n    Swipe: SwipeRecognizer,\n    Pinch: PinchRecognizer,\n    Rotate: RotateRecognizer,\n    Press: PressRecognizer,\n\n    on: addEventListeners,\n    off: removeEventListeners,\n    each: each,\n    merge: merge,\n    extend: extend,\n    assign: assign,\n    inherit: inherit,\n    bindFn: bindFn,\n    prefixed: prefixed });\n\n\n  // this prevents errors when Hammer is loaded in the presence of an AMD\n  //  style loader but by script tag, not by the loader.\n  var freeGlobal = typeof window !== 'undefined' ? window : typeof self !== 'undefined' ? self : {}; // jshint ignore:line\n  freeGlobal.Hammer = Hammer;\n\n  if (typeof define === 'function' && define.amd) {\n    define(function () {\n      return Hammer;\n    });\n  } else if (typeof module != 'undefined' && module.exports) {\n    module.exports = Hammer;\n  } else {\n    window[exportName] = Hammer;\n  }\n\n})(window, document, 'Hammer');","function _typeof(obj) {\"@babel/helpers - typeof\";if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {_typeof = function _typeof(obj) {return typeof obj;};} else {_typeof = function _typeof(obj) {return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;};}return _typeof(obj);} /**\n                                                                                                                                                                                                                                                                                                                                                                                * @license\n                                                                                                                                                                                                                                                                                                                                                                                * Lodash (Custom Build) <https://lodash.com/>\n                                                                                                                                                                                                                                                                                                                                                                                * Build: `lodash include=\"debounce,throttle\" exports=\"amd\"`\n                                                                                                                                                                                                                                                                                                                                                                                * Copyright JS Foundation and other contributors <https://js.foundation/>\n                                                                                                                                                                                                                                                                                                                                                                                * Released under MIT license <https://lodash.com/license>\n                                                                                                                                                                                                                                                                                                                                                                                * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>\n                                                                                                                                                                                                                                                                                                                                                                                * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n                                                                                                                                                                                                                                                                                                                                                                                */\n;(function () {\n\n  /** Used as a safe reference for `undefined` in pre-ES5 environments. */\n  var undefined;\n\n  /** Used as the semantic version number. */\n  var VERSION = '4.17.5';\n\n  /** Error message constants. */\n  var FUNC_ERROR_TEXT = 'Expected a function';\n\n  /** Used as references for various `Number` constants. */\n  var NAN = 0 / 0;\n\n  /** `Object#toString` result references. */\n  var nullTag = '[object Null]',\n  symbolTag = '[object Symbol]',\n  undefinedTag = '[object Undefined]';\n\n  /** Used to match leading and trailing whitespace. */\n  var reTrim = /^\\s+|\\s+$/g;\n\n  /** Used to detect bad signed hexadecimal string values. */\n  var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;\n\n  /** Used to detect binary string values. */\n  var reIsBinary = /^0b[01]+$/i;\n\n  /** Used to detect octal string values. */\n  var reIsOctal = /^0o[0-7]+$/i;\n\n  /** Built-in method references without a dependency on `root`. */\n  var freeParseInt = parseInt;\n\n  /** Detect free variable `global` from Node.js. */\n  var freeGlobal = (typeof global === \"undefined\" ? \"undefined\" : _typeof(global)) == 'object' && global && global.Object === Object && global;\n\n  /** Detect free variable `self`. */\n  var freeSelf = (typeof self === \"undefined\" ? \"undefined\" : _typeof(self)) == 'object' && self && self.Object === Object && self;\n\n  /** Used as a reference to the global object. */\n  var root = freeGlobal || freeSelf || Function('return this')();\n\n  /*--------------------------------------------------------------------------*/\n\n  /** Used for built-in method references. */\n  var objectProto = Object.prototype;\n\n  /** Used to check objects for own properties. */\n  var hasOwnProperty = objectProto.hasOwnProperty;\n\n  /**\n                                                    * Used to resolve the\n                                                    * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)\n                                                    * of values.\n                                                    */\n  var nativeObjectToString = objectProto.toString;\n\n  /** Built-in value references. */\n  var _Symbol = root.Symbol,\n  symToStringTag = _Symbol ? _Symbol.toStringTag : undefined;\n\n  /* Built-in method references for those with the same name as other `lodash` methods. */\n  var nativeMax = Math.max,\n  nativeMin = Math.min;\n\n  /** Used to lookup unminified function names. */\n  var realNames = {};\n\n  /*------------------------------------------------------------------------*/\n\n  /**\n                                                                                * Creates a `lodash` object which wraps `value` to enable implicit method\n                                                                                * chain sequences. Methods that operate on and return arrays, collections,\n                                                                                * and functions can be chained together. Methods that retrieve a single value\n                                                                                * or may return a primitive value will automatically end the chain sequence\n                                                                                * and return the unwrapped value. Otherwise, the value must be unwrapped\n                                                                                * with `_#value`.\n                                                                                *\n                                                                                * Explicit chain sequences, which must be unwrapped with `_#value`, may be\n                                                                                * enabled using `_.chain`.\n                                                                                *\n                                                                                * The execution of chained methods is lazy, that is, it's deferred until\n                                                                                * `_#value` is implicitly or explicitly called.\n                                                                                *\n                                                                                * Lazy evaluation allows several methods to support shortcut fusion.\n                                                                                * Shortcut fusion is an optimization to merge iteratee calls; this avoids\n                                                                                * the creation of intermediate arrays and can greatly reduce the number of\n                                                                                * iteratee executions. Sections of a chain sequence qualify for shortcut\n                                                                                * fusion if the section is applied to an array and iteratees accept only\n                                                                                * one argument. The heuristic for whether a section qualifies for shortcut\n                                                                                * fusion is subject to change.\n                                                                                *\n                                                                                * Chaining is supported in custom builds as long as the `_#value` method is\n                                                                                * directly or indirectly included in the build.\n                                                                                *\n                                                                                * In addition to lodash methods, wrappers have `Array` and `String` methods.\n                                                                                *\n                                                                                * The wrapper `Array` methods are:\n                                                                                * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`\n                                                                                *\n                                                                                * The wrapper `String` methods are:\n                                                                                * `replace` and `split`\n                                                                                *\n                                                                                * The wrapper methods that support shortcut fusion are:\n                                                                                * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,\n                                                                                * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,\n                                                                                * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`\n                                                                                *\n                                                                                * The chainable wrapper methods are:\n                                                                                * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,\n                                                                                * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,\n                                                                                * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,\n                                                                                * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,\n                                                                                * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,\n                                                                                * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,\n                                                                                * `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`,\n                                                                                * `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`,\n                                                                                * `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`,\n                                                                                * `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`,\n                                                                                * `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`,\n                                                                                * `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`,\n                                                                                * `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`,\n                                                                                * `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`,\n                                                                                * `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`,\n                                                                                * `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`,\n                                                                                * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,\n                                                                                * `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`,\n                                                                                * `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`,\n                                                                                * `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`,\n                                                                                * `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`,\n                                                                                * `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`,\n                                                                                * `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`,\n                                                                                * `zipObject`, `zipObjectDeep`, and `zipWith`\n                                                                                *\n                                                                                * The wrapper methods that are **not** chainable by default are:\n                                                                                * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,\n                                                                                * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`,\n                                                                                * `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`,\n                                                                                * `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`,\n                                                                                * `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`,\n                                                                                * `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`,\n                                                                                * `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`,\n                                                                                * `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`,\n                                                                                * `isBoolean`, `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`,\n                                                                                * `isEqualWith`, `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`,\n                                                                                * `isMap`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,\n                                                                                * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,\n                                                                                * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,\n                                                                                * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,\n                                                                                * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,\n                                                                                * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,\n                                                                                * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,\n                                                                                * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,\n                                                                                * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,\n                                                                                * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,\n                                                                                * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,\n                                                                                * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,\n                                                                                * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,\n                                                                                * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,\n                                                                                * `upperFirst`, `value`, and `words`\n                                                                                *\n                                                                                * @name _\n                                                                                * @constructor\n                                                                                * @category Seq\n                                                                                * @param {*} value The value to wrap in a `lodash` instance.\n                                                                                * @returns {Object} Returns the new `lodash` wrapper instance.\n                                                                                * @example\n                                                                                *\n                                                                                * function square(n) {\n                                                                                *   return n * n;\n                                                                                * }\n                                                                                *\n                                                                                * var wrapped = _([1, 2, 3]);\n                                                                                *\n                                                                                * // Returns an unwrapped value.\n                                                                                * wrapped.reduce(_.add);\n                                                                                * // => 6\n                                                                                *\n                                                                                * // Returns a wrapped value.\n                                                                                * var squares = wrapped.map(square);\n                                                                                *\n                                                                                * _.isArray(squares);\n                                                                                * // => false\n                                                                                *\n                                                                                * _.isArray(squares.value());\n                                                                                * // => true\n                                                                                */\n  function lodash() {\n    // No operation performed.\n  }\n\n  /*------------------------------------------------------------------------*/\n\n  /**\n                                                                                * The base implementation of `getTag` without fallbacks for buggy environments.\n                                                                                *\n                                                                                * @private\n                                                                                * @param {*} value The value to query.\n                                                                                * @returns {string} Returns the `toStringTag`.\n                                                                                */\n  function baseGetTag(value) {\n    if (value == null) {\n      return value === undefined ? undefinedTag : nullTag;\n    }\n    return symToStringTag && symToStringTag in Object(value) ?\n    getRawTag(value) :\n    objectToString(value);\n  }\n\n  /**\n     * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.\n     *\n     * @private\n     * @param {*} value The value to query.\n     * @returns {string} Returns the raw `toStringTag`.\n     */\n  function getRawTag(value) {\n    var isOwn = hasOwnProperty.call(value, symToStringTag),\n    tag = value[symToStringTag];\n\n    try {\n      value[symToStringTag] = undefined;\n      var unmasked = true;\n    } catch (e) {}\n\n    var result = nativeObjectToString.call(value);\n    if (unmasked) {\n      if (isOwn) {\n        value[symToStringTag] = tag;\n      } else {\n        delete value[symToStringTag];\n      }\n    }\n    return result;\n  }\n\n  /**\n     * Converts `value` to a string using `Object.prototype.toString`.\n     *\n     * @private\n     * @param {*} value The value to convert.\n     * @returns {string} Returns the converted string.\n     */\n  function objectToString(value) {\n    return nativeObjectToString.call(value);\n  }\n\n  /*------------------------------------------------------------------------*/\n\n  /**\n                                                                                * Gets the timestamp of the number of milliseconds that have elapsed since\n                                                                                * the Unix epoch (1 January 1970 00:00:00 UTC).\n                                                                                *\n                                                                                * @static\n                                                                                * @memberOf _\n                                                                                * @since 2.4.0\n                                                                                * @category Date\n                                                                                * @returns {number} Returns the timestamp.\n                                                                                * @example\n                                                                                *\n                                                                                * _.defer(function(stamp) {\n                                                                                *   console.log(_.now() - stamp);\n                                                                                * }, _.now());\n                                                                                * // => Logs the number of milliseconds it took for the deferred invocation.\n                                                                                */\n  var now = function now() {\n    return root.Date.now();\n  };\n\n  /*------------------------------------------------------------------------*/\n\n  /**\n                                                                                * Creates a debounced function that delays invoking `func` until after `wait`\n                                                                                * milliseconds have elapsed since the last time the debounced function was\n                                                                                * invoked. The debounced function comes with a `cancel` method to cancel\n                                                                                * delayed `func` invocations and a `flush` method to immediately invoke them.\n                                                                                * Provide `options` to indicate whether `func` should be invoked on the\n                                                                                * leading and/or trailing edge of the `wait` timeout. The `func` is invoked\n                                                                                * with the last arguments provided to the debounced function. Subsequent\n                                                                                * calls to the debounced function return the result of the last `func`\n                                                                                * invocation.\n                                                                                *\n                                                                                * **Note:** If `leading` and `trailing` options are `true`, `func` is\n                                                                                * invoked on the trailing edge of the timeout only if the debounced function\n                                                                                * is invoked more than once during the `wait` timeout.\n                                                                                *\n                                                                                * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred\n                                                                                * until to the next tick, similar to `setTimeout` with a timeout of `0`.\n                                                                                *\n                                                                                * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)\n                                                                                * for details over the differences between `_.debounce` and `_.throttle`.\n                                                                                *\n                                                                                * @static\n                                                                                * @memberOf _\n                                                                                * @since 0.1.0\n                                                                                * @category Function\n                                                                                * @param {Function} func The function to debounce.\n                                                                                * @param {number} [wait=0] The number of milliseconds to delay.\n                                                                                * @param {Object} [options={}] The options object.\n                                                                                * @param {boolean} [options.leading=false]\n                                                                                *  Specify invoking on the leading edge of the timeout.\n                                                                                * @param {number} [options.maxWait]\n                                                                                *  The maximum time `func` is allowed to be delayed before it's invoked.\n                                                                                * @param {boolean} [options.trailing=true]\n                                                                                *  Specify invoking on the trailing edge of the timeout.\n                                                                                * @returns {Function} Returns the new debounced function.\n                                                                                * @example\n                                                                                *\n                                                                                * // Avoid costly calculations while the window size is in flux.\n                                                                                * jQuery(window).on('resize', _.debounce(calculateLayout, 150));\n                                                                                *\n                                                                                * // Invoke `sendMail` when clicked, debouncing subsequent calls.\n                                                                                * jQuery(element).on('click', _.debounce(sendMail, 300, {\n                                                                                *   'leading': true,\n                                                                                *   'trailing': false\n                                                                                * }));\n                                                                                *\n                                                                                * // Ensure `batchLog` is invoked once after 1 second of debounced calls.\n                                                                                * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });\n                                                                                * var source = new EventSource('/stream');\n                                                                                * jQuery(source).on('message', debounced);\n                                                                                *\n                                                                                * // Cancel the trailing debounced invocation.\n                                                                                * jQuery(window).on('popstate', debounced.cancel);\n                                                                                */\n  function debounce(func, wait, options) {\n    var lastArgs,\n    lastThis,\n    maxWait,\n    result,\n    timerId,\n    lastCallTime,\n    lastInvokeTime = 0,\n    leading = false,\n    maxing = false,\n    trailing = true;\n\n    if (typeof func != 'function') {\n      throw new TypeError(FUNC_ERROR_TEXT);\n    }\n    wait = toNumber(wait) || 0;\n    if (isObject(options)) {\n      leading = !!options.leading;\n      maxing = 'maxWait' in options;\n      maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;\n      trailing = 'trailing' in options ? !!options.trailing : trailing;\n    }\n\n    function invokeFunc(time) {\n      var args = lastArgs,\n      thisArg = lastThis;\n\n      lastArgs = lastThis = undefined;\n      lastInvokeTime = time;\n      result = func.apply(thisArg, args);\n      return result;\n    }\n\n    function leadingEdge(time) {\n      // Reset any `maxWait` timer.\n      lastInvokeTime = time;\n      // Start the timer for the trailing edge.\n      timerId = setTimeout(timerExpired, wait);\n      // Invoke the leading edge.\n      return leading ? invokeFunc(time) : result;\n    }\n\n    function remainingWait(time) {\n      var timeSinceLastCall = time - lastCallTime,\n      timeSinceLastInvoke = time - lastInvokeTime,\n      timeWaiting = wait - timeSinceLastCall;\n\n      return maxing ?\n      nativeMin(timeWaiting, maxWait - timeSinceLastInvoke) :\n      timeWaiting;\n    }\n\n    function shouldInvoke(time) {\n      var timeSinceLastCall = time - lastCallTime,\n      timeSinceLastInvoke = time - lastInvokeTime;\n\n      // Either this is the first call, activity has stopped and we're at the\n      // trailing edge, the system time has gone backwards and we're treating\n      // it as the trailing edge, or we've hit the `maxWait` limit.\n      return lastCallTime === undefined || timeSinceLastCall >= wait ||\n      timeSinceLastCall < 0 || maxing && timeSinceLastInvoke >= maxWait;\n    }\n\n    function timerExpired() {\n      var time = now();\n      if (shouldInvoke(time)) {\n        return trailingEdge(time);\n      }\n      // Restart the timer.\n      timerId = setTimeout(timerExpired, remainingWait(time));\n    }\n\n    function trailingEdge(time) {\n      timerId = undefined;\n\n      // Only invoke if we have `lastArgs` which means `func` has been\n      // debounced at least once.\n      if (trailing && lastArgs) {\n        return invokeFunc(time);\n      }\n      lastArgs = lastThis = undefined;\n      return result;\n    }\n\n    function cancel() {\n      if (timerId !== undefined) {\n        clearTimeout(timerId);\n      }\n      lastInvokeTime = 0;\n      lastArgs = lastCallTime = lastThis = timerId = undefined;\n    }\n\n    function flush() {\n      return timerId === undefined ? result : trailingEdge(now());\n    }\n\n    function debounced() {\n      var time = now(),\n      isInvoking = shouldInvoke(time);\n\n      lastArgs = arguments;\n      lastThis = this;\n      lastCallTime = time;\n\n      if (isInvoking) {\n        if (timerId === undefined) {\n          return leadingEdge(lastCallTime);\n        }\n        if (maxing) {\n          // Handle invocations in a tight loop.\n          timerId = setTimeout(timerExpired, wait);\n          return invokeFunc(lastCallTime);\n        }\n      }\n      if (timerId === undefined) {\n        timerId = setTimeout(timerExpired, wait);\n      }\n      return result;\n    }\n    debounced.cancel = cancel;\n    debounced.flush = flush;\n    return debounced;\n  }\n\n  /**\n     * Creates a throttled function that only invokes `func` at most once per\n     * every `wait` milliseconds. The throttled function comes with a `cancel`\n     * method to cancel delayed `func` invocations and a `flush` method to\n     * immediately invoke them. Provide `options` to indicate whether `func`\n     * should be invoked on the leading and/or trailing edge of the `wait`\n     * timeout. The `func` is invoked with the last arguments provided to the\n     * throttled function. Subsequent calls to the throttled function return the\n     * result of the last `func` invocation.\n     *\n     * **Note:** If `leading` and `trailing` options are `true`, `func` is\n     * invoked on the trailing edge of the timeout only if the throttled function\n     * is invoked more than once during the `wait` timeout.\n     *\n     * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred\n     * until to the next tick, similar to `setTimeout` with a timeout of `0`.\n     *\n     * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)\n     * for details over the differences between `_.throttle` and `_.debounce`.\n     *\n     * @static\n     * @memberOf _\n     * @since 0.1.0\n     * @category Function\n     * @param {Function} func The function to throttle.\n     * @param {number} [wait=0] The number of milliseconds to throttle invocations to.\n     * @param {Object} [options={}] The options object.\n     * @param {boolean} [options.leading=true]\n     *  Specify invoking on the leading edge of the timeout.\n     * @param {boolean} [options.trailing=true]\n     *  Specify invoking on the trailing edge of the timeout.\n     * @returns {Function} Returns the new throttled function.\n     * @example\n     *\n     * // Avoid excessively updating the position while scrolling.\n     * jQuery(window).on('scroll', _.throttle(updatePosition, 100));\n     *\n     * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.\n     * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });\n     * jQuery(element).on('click', throttled);\n     *\n     * // Cancel the trailing throttled invocation.\n     * jQuery(window).on('popstate', throttled.cancel);\n     */\n  function throttle(func, wait, options) {\n    var leading = true,\n    trailing = true;\n\n    if (typeof func != 'function') {\n      throw new TypeError(FUNC_ERROR_TEXT);\n    }\n    if (isObject(options)) {\n      leading = 'leading' in options ? !!options.leading : leading;\n      trailing = 'trailing' in options ? !!options.trailing : trailing;\n    }\n    return debounce(func, wait, {\n      'leading': leading,\n      'maxWait': wait,\n      'trailing': trailing });\n\n  }\n\n  /*------------------------------------------------------------------------*/\n\n  /**\n                                                                                * Checks if `value` is the\n                                                                                * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)\n                                                                                * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)\n                                                                                *\n                                                                                * @static\n                                                                                * @memberOf _\n                                                                                * @since 0.1.0\n                                                                                * @category Lang\n                                                                                * @param {*} value The value to check.\n                                                                                * @returns {boolean} Returns `true` if `value` is an object, else `false`.\n                                                                                * @example\n                                                                                *\n                                                                                * _.isObject({});\n                                                                                * // => true\n                                                                                *\n                                                                                * _.isObject([1, 2, 3]);\n                                                                                * // => true\n                                                                                *\n                                                                                * _.isObject(_.noop);\n                                                                                * // => true\n                                                                                *\n                                                                                * _.isObject(null);\n                                                                                * // => false\n                                                                                */\n  function isObject(value) {\n    var type = _typeof(value);\n    return value != null && (type == 'object' || type == 'function');\n  }\n\n  /**\n     * Checks if `value` is object-like. A value is object-like if it's not `null`\n     * and has a `typeof` result of \"object\".\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is object-like, else `false`.\n     * @example\n     *\n     * _.isObjectLike({});\n     * // => true\n     *\n     * _.isObjectLike([1, 2, 3]);\n     * // => true\n     *\n     * _.isObjectLike(_.noop);\n     * // => false\n     *\n     * _.isObjectLike(null);\n     * // => false\n     */\n  function isObjectLike(value) {\n    return value != null && _typeof(value) == 'object';\n  }\n\n  /**\n     * Checks if `value` is classified as a `Symbol` primitive or object.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Lang\n     * @param {*} value The value to check.\n     * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.\n     * @example\n     *\n     * _.isSymbol(Symbol.iterator);\n     * // => true\n     *\n     * _.isSymbol('abc');\n     * // => false\n     */\n  function isSymbol(value) {\n    return _typeof(value) == 'symbol' ||\n    isObjectLike(value) && baseGetTag(value) == symbolTag;\n  }\n\n  /**\n     * Converts `value` to a number.\n     *\n     * @static\n     * @memberOf _\n     * @since 4.0.0\n     * @category Lang\n     * @param {*} value The value to process.\n     * @returns {number} Returns the number.\n     * @example\n     *\n     * _.toNumber(3.2);\n     * // => 3.2\n     *\n     * _.toNumber(Number.MIN_VALUE);\n     * // => 5e-324\n     *\n     * _.toNumber(Infinity);\n     * // => Infinity\n     *\n     * _.toNumber('3.2');\n     * // => 3.2\n     */\n  function toNumber(value) {\n    if (typeof value == 'number') {\n      return value;\n    }\n    if (isSymbol(value)) {\n      return NAN;\n    }\n    if (isObject(value)) {\n      var other = typeof value.valueOf == 'function' ? value.valueOf() : value;\n      value = isObject(other) ? other + '' : other;\n    }\n    if (typeof value != 'string') {\n      return value === 0 ? value : +value;\n    }\n    value = value.replace(reTrim, '');\n    var isBinary = reIsBinary.test(value);\n    return isBinary || reIsOctal.test(value) ?\n    freeParseInt(value.slice(2), isBinary ? 2 : 8) :\n    reIsBadHex.test(value) ? NAN : +value;\n  }\n\n  /*------------------------------------------------------------------------*/\n\n  // Add methods that return wrapped values in chain sequences.\n  lodash.debounce = debounce;\n  lodash.throttle = throttle;\n\n  /*------------------------------------------------------------------------*/\n\n  // Add methods that return unwrapped values in chain sequences.\n  lodash.isObject = isObject;\n  lodash.isObjectLike = isObjectLike;\n  lodash.isSymbol = isSymbol;\n  lodash.now = now;\n  lodash.toNumber = toNumber;\n\n  /*------------------------------------------------------------------------*/\n\n  /**\n                                                                                * The semantic version number.\n                                                                                *\n                                                                                * @static\n                                                                                * 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0x20534444;\n\n  var DDSD_CAPS = 0x1,\n  DDSD_HEIGHT = 0x2,\n  DDSD_WIDTH = 0x4,\n  DDSD_PITCH = 0x8,\n  DDSD_PIXELFORMAT = 0x1000,\n  DDSD_MIPMAPCOUNT = 0x20000,\n  DDSD_LINEARSIZE = 0x80000,\n  DDSD_DEPTH = 0x800000;\n\n  var DDSCAPS_COMPLEX = 0x8,\n  DDSCAPS_MIPMAP = 0x400000,\n  DDSCAPS_TEXTURE = 0x1000;\n\n  var DDSCAPS2_CUBEMAP = 0x200,\n  DDSCAPS2_CUBEMAP_POSITIVEX = 0x400,\n  DDSCAPS2_CUBEMAP_NEGATIVEX = 0x800,\n  DDSCAPS2_CUBEMAP_POSITIVEY = 0x1000,\n  DDSCAPS2_CUBEMAP_NEGATIVEY = 0x2000,\n  DDSCAPS2_CUBEMAP_POSITIVEZ = 0x4000,\n  DDSCAPS2_CUBEMAP_NEGATIVEZ = 0x8000,\n  DDSCAPS2_VOLUME = 0x200000;\n\n  var DDPF_ALPHAPIXELS = 0x1,\n  DDPF_ALPHA = 0x2,\n  DDPF_FOURCC = 0x4,\n  DDPF_RGB = 0x40,\n  DDPF_YUV = 0x200,\n  DDPF_LUMINANCE = 0x20000;\n\n  function fourCCToInt32(value) {\n\n    return value.charCodeAt(0) + (\n    value.charCodeAt(1) << 8) + (\n    value.charCodeAt(2) << 16) + (\n    value.charCodeAt(3) << 24);\n\n  }\n\n  function int32ToFourCC(value) {\n\n    return String.fromCharCode(\n    value & 0xff,\n    value >> 8 & 0xff,\n    value >> 16 & 0xff,\n    value >> 24 & 0xff);\n\n  }\n\n  function loadARGBMip(buffer, dataOffset, width, height) {\n    var dataLength = width * height * 4;\n    var srcBuffer = new Uint8Array(buffer, dataOffset, dataLength);\n    var byteArray = new Uint8Array(dataLength);\n    var dst = 0;\n    var src = 0;\n    for (var y = 0; y < height; y++) {\n      for (var x = 0; x < width; x++) {\n        var b = srcBuffer[src];src++;\n        var g = srcBuffer[src];src++;\n        var r = srcBuffer[src];src++;\n        var a = srcBuffer[src];src++;\n        byteArray[dst] = r;dst++; //r\n        byteArray[dst] = g;dst++; //g\n        byteArray[dst] = b;dst++; //b\n        byteArray[dst] = a;dst++; //a\n      }\n    }\n    return byteArray;\n  }\n\n  var FOURCC_DXT1 = fourCCToInt32(\"DXT1\");\n  var FOURCC_DXT3 = fourCCToInt32(\"DXT3\");\n  var FOURCC_DXT5 = fourCCToInt32(\"DXT5\");\n\n  var headerLengthInt = 31; // The header length in 32 bit ints\n\n  // Offsets into the header array\n\n  var off_magic = 0;\n\n  var off_size = 1;\n  var off_flags = 2;\n  var off_height = 3;\n  var off_width = 4;\n\n  var off_mipmapCount = 7;\n\n  var off_pfFlags = 20;\n  var off_pfFourCC = 21;\n  var off_RGBBitCount = 22;\n  var off_RBitMask = 23;\n  var off_GBitMask = 24;\n  var off_BBitMask = 25;\n  var off_ABitMask = 26;\n\n  var off_caps = 27;\n  var off_caps2 = 28;\n  var off_caps3 = 29;\n  var off_caps4 = 30;\n\n  // Avoid exception if buffer is shorter than header-length\n  var minByteLength = headerLengthInt * 4;\n  if (buffer.byteLength < minByteLength) {\n    console.error('THREE.DDSLoader.parse: File is empty or incomplete.');\n    return dds;\n  }\n\n  // Parse header\n\n  var header = new Int32Array(buffer, 0, headerLengthInt);\n\n  if (header[off_magic] !== DDS_MAGIC) {\n\n    console.error('THREE.DDSLoader.parse: Invalid magic number in DDS header.');\n    return dds;\n\n  }\n\n  if (!header[off_pfFlags] & DDPF_FOURCC) {\n\n    console.error('THREE.DDSLoader.parse: Unsupported format, must contain a FourCC code.');\n    return dds;\n\n  }\n\n  var blockBytes;\n\n  var fourCC = header[off_pfFourCC];\n\n  var isRGBAUncompressed = false;\n\n  switch (fourCC) {\n\n    case FOURCC_DXT1:\n\n      blockBytes = 8;\n      dds.format = THREE.RGB_S3TC_DXT1_Format;\n      break;\n\n    case FOURCC_DXT3:\n\n      blockBytes = 16;\n      dds.format = THREE.RGBA_S3TC_DXT3_Format;\n      break;\n\n    case FOURCC_DXT5:\n\n      blockBytes = 16;\n      dds.format = THREE.RGBA_S3TC_DXT5_Format;\n      break;\n\n    default:\n\n      if (header[off_RGBBitCount] == 32 &&\n      header[off_RBitMask] & 0xff0000 &&\n      header[off_GBitMask] & 0xff00 &&\n      header[off_BBitMask] & 0xff &&\n      header[off_ABitMask] & 0xff000000) {\n        isRGBAUncompressed = true;\n        blockBytes = 64;\n        dds.format = THREE.RGBAFormat;\n      } else {\n        console.error('THREE.DDSLoader.parse: Unsupported FourCC code ', int32ToFourCC(fourCC));\n        return dds;\n      }}\n\n\n  dds.mipmapCount = 1;\n\n  if (header[off_mipmapCount] > 0 && loadMipmaps !== false) {\n\n    dds.mipmapCount = Math.max(1, header[off_mipmapCount]);\n\n  }\n\n  //TODO: Verify that all faces of the cubemap are present with DDSCAPS2_CUBEMAP_POSITIVEX, etc.\n\n  dds.isCubemap = header[off_caps2] & DDSCAPS2_CUBEMAP ? true : false;\n\n  dds.width = header[off_width];\n  dds.height = header[off_height];\n\n  var dataOffset = header[off_size] + 4;\n\n  // Extract mipmaps buffers\n\n  var width = dds.width;\n  var height = dds.height;\n\n  var faces = dds.isCubemap ? 6 : 1;\n\n  for (var face = 0; face < faces; face++) {\n\n    for (var i = 0; i < dds.mipmapCount; i++) {\n\n      if (isRGBAUncompressed) {\n        var byteArray = loadARGBMip(buffer, dataOffset, width, height);\n        var dataLength = byteArray.length;\n      } else {\n        var dataLength = Math.max(4, width) / 4 * Math.max(4, height) / 4 * blockBytes;\n        var byteArray = new Uint8Array(buffer, dataOffset, dataLength);\n      }\n\n      var mipmap = { \"data\": byteArray, \"width\": width, \"height\": height };\n      dds.mipmaps.push(mipmap);\n\n      dataOffset += dataLength;\n\n      width = Math.max(width * 0.5, 1);\n      height = Math.max(height * 0.5, 1);\n\n    }\n\n    width = dds.width;\n    height = dds.height;\n\n  }\n\n  return dds;\n\n};","function _typeof(obj) {\"@babel/helpers - typeof\";if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {_typeof = function _typeof(obj) {return typeof obj;};} else {_typeof = function _typeof(obj) {return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;};}return _typeof(obj);} // File:src/Three.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nvar THREE = { REVISION: '71' };\n\n// browserify support\n\nif ((typeof module === \"undefined\" ? \"undefined\" : _typeof(module)) === 'object') {\n\n  module.exports = THREE;\n\n}\n\n// polyfills\n\nif (Math.sign === undefined) {\n\n  // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/sign\n\n  Math.sign = function (x) {\n\n    return x < 0 ? -1 : x > 0 ? 1 : +x;\n\n  };\n\n}\n\n\n// set the default log handlers\nTHREE.log = function () {console.log.apply(console, arguments);};\nTHREE.warn = function () {console.warn.apply(console, arguments);};\nTHREE.error = function () {console.error.apply(console, arguments);};\n\n\n// https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent.button\n\nTHREE.MOUSE = { LEFT: 0, MIDDLE: 1, RIGHT: 2 };\n\n// GL STATE CONSTANTS\n\nTHREE.CullFaceNone = 0;\nTHREE.CullFaceBack = 1;\nTHREE.CullFaceFront = 2;\nTHREE.CullFaceFrontBack = 3;\n\nTHREE.FrontFaceDirectionCW = 0;\nTHREE.FrontFaceDirectionCCW = 1;\n\n// SHADOWING TYPES\n\nTHREE.BasicShadowMap = 0;\nTHREE.PCFShadowMap = 1;\nTHREE.PCFSoftShadowMap = 2;\n\n// MATERIAL CONSTANTS\n\n// side\n\nTHREE.FrontSide = 0;\nTHREE.BackSide = 1;\nTHREE.DoubleSide = 2;\n\n// shading\n\nTHREE.NoShading = 0;\nTHREE.FlatShading = 1;\nTHREE.SmoothShading = 2;\n\n// colors\n\nTHREE.NoColors = 0;\nTHREE.FaceColors = 1;\nTHREE.VertexColors = 2;\n\n// blending modes\n\nTHREE.NoBlending = 0;\nTHREE.NormalBlending = 1;\nTHREE.AdditiveBlending = 2;\nTHREE.SubtractiveBlending = 3;\nTHREE.MultiplyBlending = 4;\nTHREE.CustomBlending = 5;\n\n// custom blending equations\n// (numbers start from 100 not to clash with other\n//  mappings to OpenGL constants defined in Texture.js)\n\nTHREE.AddEquation = 100;\nTHREE.SubtractEquation = 101;\nTHREE.ReverseSubtractEquation = 102;\nTHREE.MinEquation = 103;\nTHREE.MaxEquation = 104;\n\n// custom blending destination factors\n\nTHREE.ZeroFactor = 200;\nTHREE.OneFactor = 201;\nTHREE.SrcColorFactor = 202;\nTHREE.OneMinusSrcColorFactor = 203;\nTHREE.SrcAlphaFactor = 204;\nTHREE.OneMinusSrcAlphaFactor = 205;\nTHREE.DstAlphaFactor = 206;\nTHREE.OneMinusDstAlphaFactor = 207;\n\n// custom blending source factors\n\n//THREE.ZeroFactor = 200;\n//THREE.OneFactor = 201;\n//THREE.SrcAlphaFactor = 204;\n//THREE.OneMinusSrcAlphaFactor = 205;\n//THREE.DstAlphaFactor = 206;\n//THREE.OneMinusDstAlphaFactor = 207;\nTHREE.DstColorFactor = 208;\nTHREE.OneMinusDstColorFactor = 209;\nTHREE.SrcAlphaSaturateFactor = 210;\n\n\n// TEXTURE CONSTANTS\n\nTHREE.MultiplyOperation = 0;\nTHREE.MixOperation = 1;\nTHREE.AddOperation = 2;\n\n// Mapping modes\n\nTHREE.UVMapping = 300;\n\nTHREE.CubeReflectionMapping = 301;\nTHREE.CubeRefractionMapping = 302;\n\nTHREE.EquirectangularReflectionMapping = 303;\nTHREE.EquirectangularRefractionMapping = 304;\n\nTHREE.SphericalReflectionMapping = 305;\n\n// Wrapping modes\n\nTHREE.RepeatWrapping = 1000;\nTHREE.ClampToEdgeWrapping = 1001;\nTHREE.MirroredRepeatWrapping = 1002;\n\n// Filters\n\nTHREE.NearestFilter = 1003;\nTHREE.NearestMipMapNearestFilter = 1004;\nTHREE.NearestMipMapLinearFilter = 1005;\nTHREE.LinearFilter = 1006;\nTHREE.LinearMipMapNearestFilter = 1007;\nTHREE.LinearMipMapLinearFilter = 1008;\n\n// Data types\n\nTHREE.UnsignedByteType = 1009;\nTHREE.ByteType = 1010;\nTHREE.ShortType = 1011;\nTHREE.UnsignedShortType = 1012;\nTHREE.IntType = 1013;\nTHREE.UnsignedIntType = 1014;\nTHREE.FloatType = 1015;\nTHREE.HalfFloatType = 1025;\n\n// Pixel types\n\n//THREE.UnsignedByteType = 1009;\nTHREE.UnsignedShort4444Type = 1016;\nTHREE.UnsignedShort5551Type = 1017;\nTHREE.UnsignedShort565Type = 1018;\n\n// Pixel formats\n\nTHREE.AlphaFormat = 1019;\nTHREE.RGBFormat = 1020;\nTHREE.RGBAFormat = 1021;\nTHREE.LuminanceFormat = 1022;\nTHREE.LuminanceAlphaFormat = 1023;\n// THREE.RGBEFormat handled as THREE.RGBAFormat in shaders\nTHREE.RGBEFormat = THREE.RGBAFormat; //1024;\n\n// DDS / ST3C Compressed texture formats\n\nTHREE.RGB_S3TC_DXT1_Format = 2001;\nTHREE.RGBA_S3TC_DXT1_Format = 2002;\nTHREE.RGBA_S3TC_DXT3_Format = 2003;\nTHREE.RGBA_S3TC_DXT5_Format = 2004;\n\n\n// PVRTC compressed texture formats\n\nTHREE.RGB_PVRTC_4BPPV1_Format = 2100;\nTHREE.RGB_PVRTC_2BPPV1_Format = 2101;\nTHREE.RGBA_PVRTC_4BPPV1_Format = 2102;\nTHREE.RGBA_PVRTC_2BPPV1_Format = 2103;\n\n\n// DEPRECATED\n\nTHREE.Projector = function () {\n\n  THREE.error('THREE.Projector has been moved to /examples/js/renderers/Projector.js.');\n\n  this.projectVector = function (vector, camera) {\n\n    THREE.warn('THREE.Projector: .projectVector() is now vector.project().');\n    vector.project(camera);\n\n  };\n\n  this.unprojectVector = function (vector, camera) {\n\n    THREE.warn('THREE.Projector: .unprojectVector() is now vector.unproject().');\n    vector.unproject(camera);\n\n  };\n\n  this.pickingRay = function (vector, camera) {\n\n    THREE.error('THREE.Projector: .pickingRay() is now raycaster.setFromCamera().');\n\n  };\n\n};\n\nTHREE.CanvasRenderer = function () {\n\n  THREE.error('THREE.CanvasRenderer has been moved to /examples/js/renderers/CanvasRenderer.js');\n\n  this.domElement = document.createElement('canvas');\n  this.clear = function () {};\n  this.render = function () {};\n  this.setClearColor = function () {};\n  this.setSize = function () {};\n\n};\n\n// File:src/math/Color.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.Color = function (color) {\n\n  if (arguments.length === 3) {\n\n    return this.setRGB(arguments[0], arguments[1], arguments[2]);\n\n  }\n\n  return this.set(color);\n\n};\n\nTHREE.Color.prototype = {\n\n  constructor: THREE.Color,\n\n  r: 1, g: 1, b: 1,\n\n  set: function set(value) {\n\n    if (value instanceof THREE.Color) {\n\n      this.copy(value);\n\n    } else if (typeof value === 'number') {\n\n      this.setHex(value);\n\n    } else if (typeof value === 'string') {\n\n      this.setStyle(value);\n\n    }\n\n    return this;\n\n  },\n\n  setHex: function setHex(hex) {\n\n    hex = Math.floor(hex);\n\n    this.r = (hex >> 16 & 255) / 255;\n    this.g = (hex >> 8 & 255) / 255;\n    this.b = (hex & 255) / 255;\n\n    return this;\n\n  },\n\n  setRGB: function setRGB(r, g, b) {\n\n    this.r = r;\n    this.g = g;\n    this.b = b;\n\n    return this;\n\n  },\n\n  setHSL: function setHSL(h, s, l) {\n\n    // h,s,l ranges are in 0.0 - 1.0\n\n    if (s === 0) {\n\n      this.r = this.g = this.b = l;\n\n    } else {\n\n      var hue2rgb = function hue2rgb(p, q, t) {\n\n        if (t < 0) t += 1;\n        if (t > 1) t -= 1;\n        if (t < 1 / 6) return p + (q - p) * 6 * t;\n        if (t < 1 / 2) return q;\n        if (t < 2 / 3) return p + (q - p) * 6 * (2 / 3 - t);\n        return p;\n\n      };\n\n      var p = l <= 0.5 ? l * (1 + s) : l + s - l * s;\n      var q = 2 * l - p;\n\n      this.r = hue2rgb(q, p, h + 1 / 3);\n      this.g = hue2rgb(q, p, h);\n      this.b = hue2rgb(q, p, h - 1 / 3);\n\n    }\n\n    return this;\n\n  },\n\n  setStyle: function setStyle(style) {\n\n    // rgb(255,0,0)\n\n    if (/^rgb\\((\\d+), ?(\\d+), ?(\\d+)\\)$/i.test(style)) {\n\n      var color = /^rgb\\((\\d+), ?(\\d+), ?(\\d+)\\)$/i.exec(style);\n\n      this.r = Math.min(255, parseInt(color[1], 10)) / 255;\n      this.g = Math.min(255, parseInt(color[2], 10)) / 255;\n      this.b = Math.min(255, parseInt(color[3], 10)) / 255;\n\n      return this;\n\n    }\n\n    // rgb(100%,0%,0%)\n\n    if (/^rgb\\((\\d+)\\%, ?(\\d+)\\%, ?(\\d+)\\%\\)$/i.test(style)) {\n\n      var color = /^rgb\\((\\d+)\\%, ?(\\d+)\\%, ?(\\d+)\\%\\)$/i.exec(style);\n\n      this.r = Math.min(100, parseInt(color[1], 10)) / 100;\n      this.g = Math.min(100, parseInt(color[2], 10)) / 100;\n      this.b = Math.min(100, parseInt(color[3], 10)) / 100;\n\n      return this;\n\n    }\n\n    // #ff0000\n\n    if (/^\\#([0-9a-f]{6})$/i.test(style)) {\n\n      var color = /^\\#([0-9a-f]{6})$/i.exec(style);\n\n      this.setHex(parseInt(color[1], 16));\n\n      return this;\n\n    }\n\n    // #f00\n\n    if (/^\\#([0-9a-f])([0-9a-f])([0-9a-f])$/i.test(style)) {\n\n      var color = /^\\#([0-9a-f])([0-9a-f])([0-9a-f])$/i.exec(style);\n\n      this.setHex(parseInt(color[1] + color[1] + color[2] + color[2] + color[3] + color[3], 16));\n\n      return this;\n\n    }\n\n    // red\n\n    if (/^(\\w+)$/i.test(style)) {\n\n      this.setHex(THREE.ColorKeywords[style]);\n\n      return this;\n\n    }\n\n\n  },\n\n  copy: function copy(color) {\n\n    this.r = color.r;\n    this.g = color.g;\n    this.b = color.b;\n\n    return this;\n\n  },\n\n  copyGammaToLinear: function copyGammaToLinear(color, gammaFactor) {\n\n    if (gammaFactor === undefined) gammaFactor = 2.0;\n\n    this.r = Math.pow(color.r, gammaFactor);\n    this.g = Math.pow(color.g, gammaFactor);\n    this.b = Math.pow(color.b, gammaFactor);\n\n    return this;\n\n  },\n\n  copyLinearToGamma: function copyLinearToGamma(color, gammaFactor) {\n\n    if (gammaFactor === undefined) gammaFactor = 2.0;\n\n    var safeInverse = gammaFactor > 0 ? 1.0 / gammaFactor : 1.0;\n\n    this.r = Math.pow(color.r, safeInverse);\n    this.g = Math.pow(color.g, safeInverse);\n    this.b = Math.pow(color.b, safeInverse);\n\n    return this;\n\n  },\n\n  convertGammaToLinear: function convertGammaToLinear() {\n\n    var r = this.r,g = this.g,b = this.b;\n\n    this.r = r * r;\n    this.g = g * g;\n    this.b = b * b;\n\n    return this;\n\n  },\n\n  convertLinearToGamma: function convertLinearToGamma() {\n\n    this.r = Math.sqrt(this.r);\n    this.g = Math.sqrt(this.g);\n    this.b = Math.sqrt(this.b);\n\n    return this;\n\n  },\n\n  getHex: function getHex() {\n\n    return this.r * 255 << 16 ^ this.g * 255 << 8 ^ this.b * 255 << 0;\n\n  },\n\n  getHexString: function getHexString() {\n\n    return ('000000' + this.getHex().toString(16)).slice(-6);\n\n  },\n\n  getHSL: function getHSL(optionalTarget) {\n\n    // h,s,l ranges are in 0.0 - 1.0\n\n    var hsl = optionalTarget || { h: 0, s: 0, l: 0 };\n\n    var r = this.r,g = this.g,b = this.b;\n\n    var max = Math.max(r, g, b);\n    var min = Math.min(r, g, b);\n\n    var hue, saturation;\n    var lightness = (min + max) / 2.0;\n\n    if (min === max) {\n\n      hue = 0;\n      saturation = 0;\n\n    } else {\n\n      var delta = max - min;\n\n      saturation = lightness <= 0.5 ? delta / (max + min) : delta / (2 - max - min);\n\n      switch (max) {\n\n        case r:hue = (g - b) / delta + (g < b ? 6 : 0);break;\n        case g:hue = (b - r) / delta + 2;break;\n        case b:hue = (r - g) / delta + 4;break;}\n\n\n\n      hue /= 6;\n\n    }\n\n    hsl.h = hue;\n    hsl.s = saturation;\n    hsl.l = lightness;\n\n    return hsl;\n\n  },\n\n  getStyle: function getStyle() {\n\n    return 'rgb(' + (this.r * 255 | 0) + ',' + (this.g * 255 | 0) + ',' + (this.b * 255 | 0) + ')';\n\n  },\n\n  offsetHSL: function offsetHSL(h, s, l) {\n\n    var hsl = this.getHSL();\n\n    hsl.h += h;hsl.s += s;hsl.l += l;\n\n    this.setHSL(hsl.h, hsl.s, hsl.l);\n\n    return this;\n\n  },\n\n  add: function add(color) {\n\n    this.r += color.r;\n    this.g += color.g;\n    this.b += color.b;\n\n    return this;\n\n  },\n\n  addColors: function addColors(color1, color2) {\n\n    this.r = color1.r + color2.r;\n    this.g = color1.g + color2.g;\n    this.b = color1.b + color2.b;\n\n    return this;\n\n  },\n\n  addScalar: function addScalar(s) {\n\n    this.r += s;\n    this.g += s;\n    this.b += s;\n\n    return this;\n\n  },\n\n  multiply: function multiply(color) {\n\n    this.r *= color.r;\n    this.g *= color.g;\n    this.b *= color.b;\n\n    return this;\n\n  },\n\n  multiplyScalar: function multiplyScalar(s) {\n\n    this.r *= s;\n    this.g *= s;\n    this.b *= s;\n\n    return this;\n\n  },\n\n  lerp: function lerp(color, alpha) {\n\n    this.r += (color.r - this.r) * alpha;\n    this.g += (color.g - this.g) * alpha;\n    this.b += (color.b - this.b) * alpha;\n\n    return this;\n\n  },\n\n  equals: function equals(c) {\n\n    return c.r === this.r && c.g === this.g && c.b === this.b;\n\n  },\n\n  fromArray: function fromArray(array) {\n\n    this.r = array[0];\n    this.g = array[1];\n    this.b = array[2];\n\n    return this;\n\n  },\n\n  toArray: function toArray(array, offset) {\n\n    if (array === undefined) array = [];\n    if (offset === undefined) offset = 0;\n\n    array[offset] = this.r;\n    array[offset + 1] = this.g;\n    array[offset + 2] = this.b;\n\n    return array;\n  },\n\n  clone: function clone() {\n\n    return new THREE.Color().setRGB(this.r, this.g, this.b);\n\n  } };\n\n\n\nTHREE.ColorKeywords = { 'aliceblue': 0xF0F8FF, 'antiquewhite': 0xFAEBD7, 'aqua': 0x00FFFF, 'aquamarine': 0x7FFFD4, 'azure': 0xF0FFFF,\n  'beige': 0xF5F5DC, 'bisque': 0xFFE4C4, 'black': 0x000000, 'blanchedalmond': 0xFFEBCD, 'blue': 0x0000FF, 'blueviolet': 0x8A2BE2,\n  'brown': 0xA52A2A, 'burlywood': 0xDEB887, 'cadetblue': 0x5F9EA0, 'chartreuse': 0x7FFF00, 'chocolate': 0xD2691E, 'coral': 0xFF7F50,\n  'cornflowerblue': 0x6495ED, 'cornsilk': 0xFFF8DC, 'crimson': 0xDC143C, 'cyan': 0x00FFFF, 'darkblue': 0x00008B, 'darkcyan': 0x008B8B,\n  'darkgoldenrod': 0xB8860B, 'darkgray': 0xA9A9A9, 'darkgreen': 0x006400, 'darkgrey': 0xA9A9A9, 'darkkhaki': 0xBDB76B, 'darkmagenta': 0x8B008B,\n  'darkolivegreen': 0x556B2F, 'darkorange': 0xFF8C00, 'darkorchid': 0x9932CC, 'darkred': 0x8B0000, 'darksalmon': 0xE9967A, 'darkseagreen': 0x8FBC8F,\n  'darkslateblue': 0x483D8B, 'darkslategray': 0x2F4F4F, 'darkslategrey': 0x2F4F4F, 'darkturquoise': 0x00CED1, 'darkviolet': 0x9400D3,\n  'deeppink': 0xFF1493, 'deepskyblue': 0x00BFFF, 'dimgray': 0x696969, 'dimgrey': 0x696969, 'dodgerblue': 0x1E90FF, 'firebrick': 0xB22222,\n  'floralwhite': 0xFFFAF0, 'forestgreen': 0x228B22, 'fuchsia': 0xFF00FF, 'gainsboro': 0xDCDCDC, 'ghostwhite': 0xF8F8FF, 'gold': 0xFFD700,\n  'goldenrod': 0xDAA520, 'gray': 0x808080, 'green': 0x008000, 'greenyellow': 0xADFF2F, 'grey': 0x808080, 'honeydew': 0xF0FFF0, 'hotpink': 0xFF69B4,\n  'indianred': 0xCD5C5C, 'indigo': 0x4B0082, 'ivory': 0xFFFFF0, 'khaki': 0xF0E68C, 'lavender': 0xE6E6FA, 'lavenderblush': 0xFFF0F5, 'lawngreen': 0x7CFC00,\n  'lemonchiffon': 0xFFFACD, 'lightblue': 0xADD8E6, 'lightcoral': 0xF08080, 'lightcyan': 0xE0FFFF, 'lightgoldenrodyellow': 0xFAFAD2, 'lightgray': 0xD3D3D3,\n  'lightgreen': 0x90EE90, 'lightgrey': 0xD3D3D3, 'lightpink': 0xFFB6C1, 'lightsalmon': 0xFFA07A, 'lightseagreen': 0x20B2AA, 'lightskyblue': 0x87CEFA,\n  'lightslategray': 0x778899, 'lightslategrey': 0x778899, 'lightsteelblue': 0xB0C4DE, 'lightyellow': 0xFFFFE0, 'lime': 0x00FF00, 'limegreen': 0x32CD32,\n  'linen': 0xFAF0E6, 'magenta': 0xFF00FF, 'maroon': 0x800000, 'mediumaquamarine': 0x66CDAA, 'mediumblue': 0x0000CD, 'mediumorchid': 0xBA55D3,\n  'mediumpurple': 0x9370DB, 'mediumseagreen': 0x3CB371, 'mediumslateblue': 0x7B68EE, 'mediumspringgreen': 0x00FA9A, 'mediumturquoise': 0x48D1CC,\n  'mediumvioletred': 0xC71585, 'midnightblue': 0x191970, 'mintcream': 0xF5FFFA, 'mistyrose': 0xFFE4E1, 'moccasin': 0xFFE4B5, 'navajowhite': 0xFFDEAD,\n  'navy': 0x000080, 'oldlace': 0xFDF5E6, 'olive': 0x808000, 'olivedrab': 0x6B8E23, 'orange': 0xFFA500, 'orangered': 0xFF4500, 'orchid': 0xDA70D6,\n  'palegoldenrod': 0xEEE8AA, 'palegreen': 0x98FB98, 'paleturquoise': 0xAFEEEE, 'palevioletred': 0xDB7093, 'papayawhip': 0xFFEFD5, 'peachpuff': 0xFFDAB9,\n  'peru': 0xCD853F, 'pink': 0xFFC0CB, 'plum': 0xDDA0DD, 'powderblue': 0xB0E0E6, 'purple': 0x800080, 'red': 0xFF0000, 'rosybrown': 0xBC8F8F,\n  'royalblue': 0x4169E1, 'saddlebrown': 0x8B4513, 'salmon': 0xFA8072, 'sandybrown': 0xF4A460, 'seagreen': 0x2E8B57, 'seashell': 0xFFF5EE,\n  'sienna': 0xA0522D, 'silver': 0xC0C0C0, 'skyblue': 0x87CEEB, 'slateblue': 0x6A5ACD, 'slategray': 0x708090, 'slategrey': 0x708090, 'snow': 0xFFFAFA,\n  'springgreen': 0x00FF7F, 'steelblue': 0x4682B4, 'tan': 0xD2B48C, 'teal': 0x008080, 'thistle': 0xD8BFD8, 'tomato': 0xFF6347, 'turquoise': 0x40E0D0,\n  'violet': 0xEE82EE, 'wheat': 0xF5DEB3, 'white': 0xFFFFFF, 'whitesmoke': 0xF5F5F5, 'yellow': 0xFFFF00, 'yellowgreen': 0x9ACD32 };\n\n// File:src/math/Quaternion.js\n\n/**\n * @author mikael emtinger / http://gomo.se/\n * @author alteredq / http://alteredqualia.com/\n * @author WestLangley / http://github.com/WestLangley\n * @author bhouston / http://exocortex.com\n */\n\nTHREE.Quaternion = function (x, y, z, w) {\n\n  this._x = x || 0;\n  this._y = y || 0;\n  this._z = z || 0;\n  this._w = w !== undefined ? w : 1;\n\n};\n\nTHREE.Quaternion.prototype = {\n\n  constructor: THREE.Quaternion,\n\n  _x: 0, _y: 0, _z: 0, _w: 0,\n\n  get x() {\n\n    return this._x;\n\n  },\n\n  set x(value) {\n\n    this._x = value;\n    this.onChangeCallback();\n\n  },\n\n  get y() {\n\n    return this._y;\n\n  },\n\n  set y(value) {\n\n    this._y = value;\n    this.onChangeCallback();\n\n  },\n\n  get z() {\n\n    return this._z;\n\n  },\n\n  set z(value) {\n\n    this._z = value;\n    this.onChangeCallback();\n\n  },\n\n  get w() {\n\n    return this._w;\n\n  },\n\n  set w(value) {\n\n    this._w = value;\n    this.onChangeCallback();\n\n  },\n\n  set: function set(x, y, z, w) {\n\n    this._x = x;\n    this._y = y;\n    this._z = z;\n    this._w = w;\n\n    this.onChangeCallback();\n\n    return this;\n\n  },\n\n  copy: function copy(quaternion) {\n\n    this._x = quaternion.x;\n    this._y = quaternion.y;\n    this._z = quaternion.z;\n    this._w = quaternion.w;\n\n    this.onChangeCallback();\n\n    return this;\n\n  },\n\n  setFromEuler: function setFromEuler(euler, update) {\n\n    if (euler instanceof THREE.Euler === false) {\n\n      throw new Error('THREE.Quaternion: .setFromEuler() now expects a Euler rotation rather than a Vector3 and order.');\n    }\n\n    // http://www.mathworks.com/matlabcentral/fileexchange/\n    // \t20696-function-to-convert-between-dcm-euler-angles-quaternions-and-euler-vectors/\n    //\tcontent/SpinCalc.m\n\n    var c1 = Math.cos(euler._x / 2);\n    var c2 = Math.cos(euler._y / 2);\n    var c3 = Math.cos(euler._z / 2);\n    var s1 = Math.sin(euler._x / 2);\n    var s2 = Math.sin(euler._y / 2);\n    var s3 = Math.sin(euler._z / 2);\n\n    if (euler.order === 'XYZ') {\n\n      this._x = s1 * c2 * c3 + c1 * s2 * s3;\n      this._y = c1 * s2 * c3 - s1 * c2 * s3;\n      this._z = c1 * c2 * s3 + s1 * s2 * c3;\n      this._w = c1 * c2 * c3 - s1 * s2 * s3;\n\n    } else if (euler.order === 'YXZ') {\n\n      this._x = s1 * c2 * c3 + c1 * s2 * s3;\n      this._y = c1 * s2 * c3 - s1 * c2 * s3;\n      this._z = c1 * c2 * s3 - s1 * s2 * c3;\n      this._w = c1 * c2 * c3 + s1 * s2 * s3;\n\n    } else if (euler.order === 'ZXY') {\n\n      this._x = s1 * c2 * c3 - c1 * s2 * s3;\n      this._y = c1 * s2 * c3 + s1 * c2 * s3;\n      this._z = c1 * c2 * s3 + s1 * s2 * c3;\n      this._w = c1 * c2 * c3 - s1 * s2 * s3;\n\n    } else if (euler.order === 'ZYX') {\n\n      this._x = s1 * c2 * c3 - c1 * s2 * s3;\n      this._y = c1 * s2 * c3 + s1 * c2 * s3;\n      this._z = c1 * c2 * s3 - s1 * s2 * c3;\n      this._w = c1 * c2 * c3 + s1 * s2 * s3;\n\n    } else if (euler.order === 'YZX') {\n\n      this._x = s1 * c2 * c3 + c1 * s2 * s3;\n      this._y = c1 * s2 * c3 + s1 * c2 * s3;\n      this._z = c1 * c2 * s3 - s1 * s2 * c3;\n      this._w = c1 * c2 * c3 - s1 * s2 * s3;\n\n    } else if (euler.order === 'XZY') {\n\n      this._x = s1 * c2 * c3 - c1 * s2 * s3;\n      this._y = c1 * s2 * c3 - s1 * c2 * s3;\n      this._z = c1 * c2 * s3 + s1 * s2 * c3;\n      this._w = c1 * c2 * c3 + s1 * s2 * s3;\n\n    }\n\n    if (update !== false) this.onChangeCallback();\n\n    return this;\n\n  },\n\n  setFromAxisAngle: function setFromAxisAngle(axis, angle) {\n\n    // http://www.euclideanspace.com/maths/geometry/rotations/conversions/angleToQuaternion/index.htm\n\n    // assumes axis is normalized\n\n    var halfAngle = angle / 2,s = Math.sin(halfAngle);\n\n    this._x = axis.x * s;\n    this._y = axis.y * s;\n    this._z = axis.z * s;\n    this._w = Math.cos(halfAngle);\n\n    this.onChangeCallback();\n\n    return this;\n\n  },\n\n  setFromRotationMatrix: function setFromRotationMatrix(m) {\n\n    // http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToQuaternion/index.htm\n\n    // assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)\n\n    var te = m.elements,\n\n    m11 = te[0],m12 = te[4],m13 = te[8],\n    m21 = te[1],m22 = te[5],m23 = te[9],\n    m31 = te[2],m32 = te[6],m33 = te[10],\n\n    trace = m11 + m22 + m33,\n    s;\n\n    if (trace > 0) {\n\n      s = 0.5 / Math.sqrt(trace + 1.0);\n\n      this._w = 0.25 / s;\n      this._x = (m32 - m23) * s;\n      this._y = (m13 - m31) * s;\n      this._z = (m21 - m12) * s;\n\n    } else if (m11 > m22 && m11 > m33) {\n\n      s = 2.0 * Math.sqrt(1.0 + m11 - m22 - m33);\n\n      this._w = (m32 - m23) / s;\n      this._x = 0.25 * s;\n      this._y = (m12 + m21) / s;\n      this._z = (m13 + m31) / s;\n\n    } else if (m22 > m33) {\n\n      s = 2.0 * Math.sqrt(1.0 + m22 - m11 - m33);\n\n      this._w = (m13 - m31) / s;\n      this._x = (m12 + m21) / s;\n      this._y = 0.25 * s;\n      this._z = (m23 + m32) / s;\n\n    } else {\n\n      s = 2.0 * Math.sqrt(1.0 + m33 - m11 - m22);\n\n      this._w = (m21 - m12) / s;\n      this._x = (m13 + m31) / s;\n      this._y = (m23 + m32) / s;\n      this._z = 0.25 * s;\n\n    }\n\n    this.onChangeCallback();\n\n    return this;\n\n  },\n\n  setFromUnitVectors: function () {\n\n    // http://lolengine.net/blog/2014/02/24/quaternion-from-two-vectors-final\n\n    // assumes direction vectors vFrom and vTo are normalized\n\n    var v1, r;\n\n    var EPS = 0.000001;\n\n    return function (vFrom, vTo) {\n\n      if (v1 === undefined) v1 = new THREE.Vector3();\n\n      r = vFrom.dot(vTo) + 1;\n\n      if (r < EPS) {\n\n        r = 0;\n\n        if (Math.abs(vFrom.x) > Math.abs(vFrom.z)) {\n\n          v1.set(-vFrom.y, vFrom.x, 0);\n\n        } else {\n\n          v1.set(0, -vFrom.z, vFrom.y);\n\n        }\n\n      } else {\n\n        v1.crossVectors(vFrom, vTo);\n\n      }\n\n      this._x = v1.x;\n      this._y = v1.y;\n      this._z = v1.z;\n      this._w = r;\n\n      this.normalize();\n\n      return this;\n\n    };\n\n  }(),\n\n  inverse: function inverse() {\n\n    this.conjugate().normalize();\n\n    return this;\n\n  },\n\n  conjugate: function conjugate() {\n\n    this._x *= -1;\n    this._y *= -1;\n    this._z *= -1;\n\n    this.onChangeCallback();\n\n    return this;\n\n  },\n\n  dot: function dot(v) {\n\n    return this._x * v._x + this._y * v._y + this._z * v._z + this._w * v._w;\n\n  },\n\n  lengthSq: function lengthSq() {\n\n    return this._x * this._x + this._y * this._y + this._z * this._z + this._w * this._w;\n\n  },\n\n  length: function length() {\n\n    return Math.sqrt(this._x * this._x + this._y * this._y + this._z * this._z + this._w * this._w);\n\n  },\n\n  normalize: function normalize() {\n\n    var l = this.length();\n\n    if (l === 0) {\n\n      this._x = 0;\n      this._y = 0;\n      this._z = 0;\n      this._w = 1;\n\n    } else {\n\n      l = 1 / l;\n\n      this._x = this._x * l;\n      this._y = this._y * l;\n      this._z = this._z * l;\n      this._w = this._w * l;\n\n    }\n\n    this.onChangeCallback();\n\n    return this;\n\n  },\n\n  multiply: function multiply(q, p) {\n\n    if (p !== undefined) {\n\n      THREE.warn('THREE.Quaternion: .multiply() now only accepts one argument. Use .multiplyQuaternions( a, b ) instead.');\n      return this.multiplyQuaternions(q, p);\n\n    }\n\n    return this.multiplyQuaternions(this, q);\n\n  },\n\n  multiplyQuaternions: function multiplyQuaternions(a, b) {\n\n    // from http://www.euclideanspace.com/maths/algebra/realNormedAlgebra/quaternions/code/index.htm\n\n    var qax = a._x,qay = a._y,qaz = a._z,qaw = a._w;\n    var qbx = b._x,qby = b._y,qbz = b._z,qbw = b._w;\n\n    this._x = qax * qbw + qaw * qbx + qay * qbz - qaz * qby;\n    this._y = qay * qbw + qaw * qby + qaz * qbx - qax * qbz;\n    this._z = qaz * qbw + qaw * qbz + qax * qby - qay * qbx;\n    this._w = qaw * qbw - qax * qbx - qay * qby - qaz * qbz;\n\n    this.onChangeCallback();\n\n    return this;\n\n  },\n\n  multiplyVector3: function multiplyVector3(vector) {\n\n    THREE.warn('THREE.Quaternion: .multiplyVector3() has been removed. Use is now vector.applyQuaternion( quaternion ) instead.');\n    return vector.applyQuaternion(this);\n\n  },\n\n  slerp: function slerp(qb, t) {\n\n    if (t === 0) return this;\n    if (t === 1) return this.copy(qb);\n\n    var x = this._x,y = this._y,z = this._z,w = this._w;\n\n    // http://www.euclideanspace.com/maths/algebra/realNormedAlgebra/quaternions/slerp/\n\n    var cosHalfTheta = w * qb._w + x * qb._x + y * qb._y + z * qb._z;\n\n    if (cosHalfTheta < 0) {\n\n      this._w = -qb._w;\n      this._x = -qb._x;\n      this._y = -qb._y;\n      this._z = -qb._z;\n\n      cosHalfTheta = -cosHalfTheta;\n\n    } else {\n\n      this.copy(qb);\n\n    }\n\n    if (cosHalfTheta >= 1.0) {\n\n      this._w = w;\n      this._x = x;\n      this._y = y;\n      this._z = z;\n\n      return this;\n\n    }\n\n    var halfTheta = Math.acos(cosHalfTheta);\n    var sinHalfTheta = Math.sqrt(1.0 - cosHalfTheta * cosHalfTheta);\n\n    if (Math.abs(sinHalfTheta) < 0.001) {\n\n      this._w = 0.5 * (w + this._w);\n      this._x = 0.5 * (x + this._x);\n      this._y = 0.5 * (y + this._y);\n      this._z = 0.5 * (z + this._z);\n\n      return this;\n\n    }\n\n    var ratioA = Math.sin((1 - t) * halfTheta) / sinHalfTheta,\n    ratioB = Math.sin(t * halfTheta) / sinHalfTheta;\n\n    this._w = w * ratioA + this._w * ratioB;\n    this._x = x * ratioA + this._x * ratioB;\n    this._y = y * ratioA + this._y * ratioB;\n    this._z = z * ratioA + this._z * ratioB;\n\n    this.onChangeCallback();\n\n    return this;\n\n  },\n\n  equals: function equals(quaternion) {\n\n    return quaternion._x === this._x && quaternion._y === this._y && quaternion._z === this._z && quaternion._w === this._w;\n\n  },\n\n  fromArray: function fromArray(array, offset) {\n\n    if (offset === undefined) offset = 0;\n\n    this._x = array[offset];\n    this._y = array[offset + 1];\n    this._z = array[offset + 2];\n    this._w = array[offset + 3];\n\n    this.onChangeCallback();\n\n    return this;\n\n  },\n\n  toArray: function toArray(array, offset) {\n\n    if (array === undefined) array = [];\n    if (offset === undefined) offset = 0;\n\n    array[offset] = this._x;\n    array[offset + 1] = this._y;\n    array[offset + 2] = this._z;\n    array[offset + 3] = this._w;\n\n    return array;\n\n  },\n\n  onChange: function onChange(callback) {\n\n    this.onChangeCallback = callback;\n\n    return this;\n\n  },\n\n  onChangeCallback: function onChangeCallback() {},\n\n  clone: function clone() {\n\n    return new THREE.Quaternion(this._x, this._y, this._z, this._w);\n\n  } };\n\n\n\nTHREE.Quaternion.slerp = function (qa, qb, qm, t) {\n\n  return qm.copy(qa).slerp(qb, t);\n\n};\n\n// File:src/math/Vector2.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author philogb / http://blog.thejit.org/\n * @author egraether / http://egraether.com/\n * @author zz85 / http://www.lab4games.net/zz85/blog\n */\n\nTHREE.Vector2 = function (x, y) {\n\n  this.x = x || 0;\n  this.y = y || 0;\n\n};\n\nTHREE.Vector2.prototype = {\n\n  constructor: THREE.Vector2,\n\n  set: function set(x, y) {\n\n    this.x = x;\n    this.y = y;\n\n    return this;\n\n  },\n\n  setX: function setX(x) {\n\n    this.x = x;\n\n    return this;\n\n  },\n\n  setY: function setY(y) {\n\n    this.y = y;\n\n    return this;\n\n  },\n\n  setComponent: function setComponent(index, value) {\n\n    switch (index) {\n\n      case 0:this.x = value;break;\n      case 1:this.y = value;break;\n      default:throw new Error('index is out of range: ' + index);}\n\n\n\n  },\n\n  getComponent: function getComponent(index) {\n\n    switch (index) {\n\n      case 0:return this.x;\n      case 1:return this.y;\n      default:throw new Error('index is out of range: ' + index);}\n\n\n\n  },\n\n  copy: function copy(v) {\n\n    this.x = v.x;\n    this.y = v.y;\n\n    return this;\n\n  },\n\n  add: function add(v, w) {\n\n    if (w !== undefined) {\n\n      THREE.warn('THREE.Vector2: .add() now only accepts one argument. Use .addVectors( a, b ) instead.');\n      return this.addVectors(v, w);\n\n    }\n\n    this.x += v.x;\n    this.y += v.y;\n\n    return this;\n\n  },\n\n  addScalar: function addScalar(s) {\n\n    this.x += s;\n    this.y += s;\n\n    return this;\n\n  },\n\n  addVectors: function addVectors(a, b) {\n\n    this.x = a.x + b.x;\n    this.y = a.y + b.y;\n\n    return this;\n\n  },\n\n  sub: function sub(v, w) {\n\n    if (w !== undefined) {\n\n      THREE.warn('THREE.Vector2: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.');\n      return this.subVectors(v, w);\n\n    }\n\n    this.x -= v.x;\n    this.y -= v.y;\n\n    return this;\n\n  },\n\n  subScalar: function subScalar(s) {\n\n    this.x -= s;\n    this.y -= s;\n\n    return this;\n\n  },\n\n  subVectors: function subVectors(a, b) {\n\n    this.x = a.x - b.x;\n    this.y = a.y - b.y;\n\n    return this;\n\n  },\n\n  multiply: function multiply(v) {\n\n    this.x *= v.x;\n    this.y *= v.y;\n\n    return this;\n\n  },\n\n  multiplyScalar: function multiplyScalar(s) {\n\n    this.x *= s;\n    this.y *= s;\n\n    return this;\n\n  },\n\n  divide: function divide(v) {\n\n    this.x /= v.x;\n    this.y /= v.y;\n\n    return this;\n\n  },\n\n  divideScalar: function divideScalar(scalar) {\n\n    if (scalar !== 0) {\n\n      var invScalar = 1 / scalar;\n\n      this.x *= invScalar;\n      this.y *= invScalar;\n\n    } else {\n\n      this.x = 0;\n      this.y = 0;\n\n    }\n\n    return this;\n\n  },\n\n  min: function min(v) {\n\n    if (this.x > v.x) {\n\n      this.x = v.x;\n\n    }\n\n    if (this.y > v.y) {\n\n      this.y = v.y;\n\n    }\n\n    return this;\n\n  },\n\n  max: function max(v) {\n\n    if (this.x < v.x) {\n\n      this.x = v.x;\n\n    }\n\n    if (this.y < v.y) {\n\n      this.y = v.y;\n\n    }\n\n    return this;\n\n  },\n\n  clamp: function clamp(min, max) {\n\n    // This function assumes min < max, if this assumption isn't true it will not operate correctly\n\n    if (this.x < min.x) {\n\n      this.x = min.x;\n\n    } else if (this.x > max.x) {\n\n      this.x = max.x;\n\n    }\n\n    if (this.y < min.y) {\n\n      this.y = min.y;\n\n    } else if (this.y > max.y) {\n\n      this.y = max.y;\n\n    }\n\n    return this;\n  },\n\n  clampScalar: function () {\n\n    var min, max;\n\n    return function (minVal, maxVal) {\n\n      if (min === undefined) {\n\n        min = new THREE.Vector2();\n        max = new THREE.Vector2();\n\n      }\n\n      min.set(minVal, minVal);\n      max.set(maxVal, maxVal);\n\n      return this.clamp(min, max);\n\n    };\n\n  }(),\n\n  floor: function floor() {\n\n    this.x = Math.floor(this.x);\n    this.y = Math.floor(this.y);\n\n    return this;\n\n  },\n\n  ceil: function ceil() {\n\n    this.x = Math.ceil(this.x);\n    this.y = Math.ceil(this.y);\n\n    return this;\n\n  },\n\n  round: function round() {\n\n    this.x = Math.round(this.x);\n    this.y = Math.round(this.y);\n\n    return this;\n\n  },\n\n  roundToZero: function roundToZero() {\n\n    this.x = this.x < 0 ? Math.ceil(this.x) : Math.floor(this.x);\n    this.y = this.y < 0 ? Math.ceil(this.y) : Math.floor(this.y);\n\n    return this;\n\n  },\n\n  negate: function negate() {\n\n    this.x = -this.x;\n    this.y = -this.y;\n\n    return this;\n\n  },\n\n  dot: function dot(v) {\n\n    return this.x * v.x + this.y * v.y;\n\n  },\n\n  lengthSq: function lengthSq() {\n\n    return this.x * this.x + this.y * this.y;\n\n  },\n\n  length: function length() {\n\n    return Math.sqrt(this.x * this.x + this.y * this.y);\n\n  },\n\n  normalize: function normalize() {\n\n    return this.divideScalar(this.length());\n\n  },\n\n  distanceTo: function distanceTo(v) {\n\n    return Math.sqrt(this.distanceToSquared(v));\n\n  },\n\n  distanceToSquared: function distanceToSquared(v) {\n\n    var dx = this.x - v.x,dy = this.y - v.y;\n    return dx * dx + dy * dy;\n\n  },\n\n  setLength: function setLength(l) {\n\n    var oldLength = this.length();\n\n    if (oldLength !== 0 && l !== oldLength) {\n\n      this.multiplyScalar(l / oldLength);\n    }\n\n    return this;\n\n  },\n\n  lerp: function lerp(v, alpha) {\n\n    this.x += (v.x - this.x) * alpha;\n    this.y += (v.y - this.y) * alpha;\n\n    return this;\n\n  },\n\n  lerpVectors: function lerpVectors(v1, v2, alpha) {\n\n    this.subVectors(v2, v1).multiplyScalar(alpha).add(v1);\n\n    return this;\n\n  },\n\n  equals: function equals(v) {\n\n    return v.x === this.x && v.y === this.y;\n\n  },\n\n  fromArray: function fromArray(array, offset) {\n\n    if (offset === undefined) offset = 0;\n\n    this.x = array[offset];\n    this.y = array[offset + 1];\n\n    return this;\n\n  },\n\n  toArray: function toArray(array, offset) {\n\n    if (array === undefined) array = [];\n    if (offset === undefined) offset = 0;\n\n    array[offset] = this.x;\n    array[offset + 1] = this.y;\n\n    return array;\n\n  },\n\n  fromAttribute: function fromAttribute(attribute, index, offset) {\n\n    if (offset === undefined) offset = 0;\n\n    index = index * attribute.itemSize + offset;\n\n    this.x = attribute.array[index];\n    this.y = attribute.array[index + 1];\n\n    return this;\n\n  },\n\n  clone: function clone() {\n\n    return new THREE.Vector2(this.x, this.y);\n\n  } };\n\n\n\n// File:src/math/Vector3.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author *kile / http://kile.stravaganza.org/\n * @author philogb / http://blog.thejit.org/\n * @author mikael emtinger / http://gomo.se/\n * @author egraether / http://egraether.com/\n * @author WestLangley / http://github.com/WestLangley\n */\n\nTHREE.Vector3 = function (x, y, z) {\n\n  this.x = x || 0;\n  this.y = y || 0;\n  this.z = z || 0;\n\n};\n\nTHREE.Vector3.prototype = {\n\n  constructor: THREE.Vector3,\n\n  set: function set(x, y, z) {\n\n    this.x = x;\n    this.y = y;\n    this.z = z;\n\n    return this;\n\n  },\n\n  setX: function setX(x) {\n\n    this.x = x;\n\n    return this;\n\n  },\n\n  setY: function setY(y) {\n\n    this.y = y;\n\n    return this;\n\n  },\n\n  setZ: function setZ(z) {\n\n    this.z = z;\n\n    return this;\n\n  },\n\n  setComponent: function setComponent(index, value) {\n\n    switch (index) {\n\n      case 0:this.x = value;break;\n      case 1:this.y = value;break;\n      case 2:this.z = value;break;\n      default:throw new Error('index is out of range: ' + index);}\n\n\n\n  },\n\n  getComponent: function getComponent(index) {\n\n    switch (index) {\n\n      case 0:return this.x;\n      case 1:return this.y;\n      case 2:return this.z;\n      default:throw new Error('index is out of range: ' + index);}\n\n\n\n  },\n\n  copy: function copy(v) {\n\n    this.x = v.x;\n    this.y = v.y;\n    this.z = v.z;\n\n    return this;\n\n  },\n\n  add: function add(v, w) {\n\n    if (w !== undefined) {\n\n      THREE.warn('THREE.Vector3: .add() now only accepts one argument. Use .addVectors( a, b ) instead.');\n      return this.addVectors(v, w);\n\n    }\n\n    this.x += v.x;\n    this.y += v.y;\n    this.z += v.z;\n\n    return this;\n\n  },\n\n  addScalar: function addScalar(s) {\n\n    this.x += s;\n    this.y += s;\n    this.z += s;\n\n    return this;\n\n  },\n\n  addVectors: function addVectors(a, b) {\n\n    this.x = a.x + b.x;\n    this.y = a.y + b.y;\n    this.z = a.z + b.z;\n\n    return this;\n\n  },\n\n  sub: function sub(v, w) {\n\n    if (w !== undefined) {\n\n      THREE.warn('THREE.Vector3: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.');\n      return this.subVectors(v, w);\n\n    }\n\n    this.x -= v.x;\n    this.y -= v.y;\n    this.z -= v.z;\n\n    return this;\n\n  },\n\n  subScalar: function subScalar(s) {\n\n    this.x -= s;\n    this.y -= s;\n    this.z -= s;\n\n    return this;\n\n  },\n\n  subVectors: function subVectors(a, b) {\n\n    this.x = a.x - b.x;\n    this.y = a.y - b.y;\n    this.z = a.z - b.z;\n\n    return this;\n\n  },\n\n  multiply: function multiply(v, w) {\n\n    if (w !== undefined) {\n\n      THREE.warn('THREE.Vector3: .multiply() now only accepts one argument. Use .multiplyVectors( a, b ) instead.');\n      return this.multiplyVectors(v, w);\n\n    }\n\n    this.x *= v.x;\n    this.y *= v.y;\n    this.z *= v.z;\n\n    return this;\n\n  },\n\n  multiplyScalar: function multiplyScalar(scalar) {\n\n    this.x *= scalar;\n    this.y *= scalar;\n    this.z *= scalar;\n\n    return this;\n\n  },\n\n  multiplyVectors: function multiplyVectors(a, b) {\n\n    this.x = a.x * b.x;\n    this.y = a.y * b.y;\n    this.z = a.z * b.z;\n\n    return this;\n\n  },\n\n  applyEuler: function () {\n\n    var quaternion;\n\n    return function (euler) {\n\n      if (euler instanceof THREE.Euler === false) {\n\n        THREE.error('THREE.Vector3: .applyEuler() now expects a Euler rotation rather than a Vector3 and order.');\n\n      }\n\n      if (quaternion === undefined) quaternion = new THREE.Quaternion();\n\n      this.applyQuaternion(quaternion.setFromEuler(euler));\n\n      return this;\n\n    };\n\n  }(),\n\n  applyAxisAngle: function () {\n\n    var quaternion;\n\n    return function (axis, angle) {\n\n      if (quaternion === undefined) quaternion = new THREE.Quaternion();\n\n      this.applyQuaternion(quaternion.setFromAxisAngle(axis, angle));\n\n      return this;\n\n    };\n\n  }(),\n\n  applyMatrix3: function applyMatrix3(m) {\n\n    var x = this.x;\n    var y = this.y;\n    var z = this.z;\n\n    var e = m.elements;\n\n    this.x = e[0] * x + e[3] * y + e[6] * z;\n    this.y = e[1] * x + e[4] * y + e[7] * z;\n    this.z = e[2] * x + e[5] * y + e[8] * z;\n\n    return this;\n\n  },\n\n  applyMatrix4: function applyMatrix4(m) {\n\n    // input: THREE.Matrix4 affine matrix\n\n    var x = this.x,y = this.y,z = this.z;\n\n    var e = m.elements;\n\n    this.x = e[0] * x + e[4] * y + e[8] * z + e[12];\n    this.y = e[1] * x + e[5] * y + e[9] * z + e[13];\n    this.z = e[2] * x + e[6] * y + e[10] * z + e[14];\n\n    return this;\n\n  },\n\n  applyProjection: function applyProjection(m) {\n\n    // input: THREE.Matrix4 projection matrix\n\n    var x = this.x,y = this.y,z = this.z;\n\n    var e = m.elements;\n    var d = 1 / (e[3] * x + e[7] * y + e[11] * z + e[15]); // perspective divide\n\n    this.x = (e[0] * x + e[4] * y + e[8] * z + e[12]) * d;\n    this.y = (e[1] * x + e[5] * y + e[9] * z + e[13]) * d;\n    this.z = (e[2] * x + e[6] * y + e[10] * z + e[14]) * d;\n\n    return this;\n\n  },\n\n  applyQuaternion: function applyQuaternion(q) {\n\n    var x = this.x;\n    var y = this.y;\n    var z = this.z;\n\n    var qx = q.x;\n    var qy = q.y;\n    var qz = q.z;\n    var qw = q.w;\n\n    // calculate quat * vector\n\n    var ix = qw * x + qy * z - qz * y;\n    var iy = qw * y + qz * x - qx * z;\n    var iz = qw * z + qx * y - qy * x;\n    var iw = -qx * x - qy * y - qz * z;\n\n    // calculate result * inverse quat\n\n    this.x = ix * qw + iw * -qx + iy * -qz - iz * -qy;\n    this.y = iy * qw + iw * -qy + iz * -qx - ix * -qz;\n    this.z = iz * qw + iw * -qz + ix * -qy - iy * -qx;\n\n    return this;\n\n  },\n\n  project: function () {\n\n    var matrix;\n\n    return function (camera) {\n\n      if (matrix === undefined) matrix = new THREE.Matrix4();\n\n      matrix.multiplyMatrices(camera.projectionMatrix, matrix.getInverse(camera.matrixWorld));\n      return this.applyProjection(matrix);\n\n    };\n\n  }(),\n\n  unproject: function () {\n\n    var matrix;\n\n    return function (camera) {\n\n      if (matrix === undefined) matrix = new THREE.Matrix4();\n\n      matrix.multiplyMatrices(camera.matrixWorld, matrix.getInverse(camera.projectionMatrix));\n      return this.applyProjection(matrix);\n\n    };\n\n  }(),\n\n  transformDirection: function transformDirection(m) {\n\n    // input: THREE.Matrix4 affine matrix\n    // vector interpreted as a direction\n\n    var x = this.x,y = this.y,z = this.z;\n\n    var e = m.elements;\n\n    this.x = e[0] * x + e[4] * y + e[8] * z;\n    this.y = e[1] * x + e[5] * y + e[9] * z;\n    this.z = e[2] * x + e[6] * y + e[10] * z;\n\n    this.normalize();\n\n    return this;\n\n  },\n\n  divide: function divide(v) {\n\n    this.x /= v.x;\n    this.y /= v.y;\n    this.z /= v.z;\n\n    return this;\n\n  },\n\n  divideScalar: function divideScalar(scalar) {\n\n    if (scalar !== 0) {\n\n      var invScalar = 1 / scalar;\n\n      this.x *= invScalar;\n      this.y *= invScalar;\n      this.z *= invScalar;\n\n    } else {\n\n      this.x = 0;\n      this.y = 0;\n      this.z = 0;\n\n    }\n\n    return this;\n\n  },\n\n  min: function min(v) {\n\n    if (this.x > v.x) {\n\n      this.x = v.x;\n\n    }\n\n    if (this.y > v.y) {\n\n      this.y = v.y;\n\n    }\n\n    if (this.z > v.z) {\n\n      this.z = v.z;\n\n    }\n\n    return this;\n\n  },\n\n  max: function max(v) {\n\n    if (this.x < v.x) {\n\n      this.x = v.x;\n\n    }\n\n    if (this.y < v.y) {\n\n      this.y = v.y;\n\n    }\n\n    if (this.z < v.z) {\n\n      this.z = v.z;\n\n    }\n\n    return this;\n\n  },\n\n  clamp: function clamp(min, max) {\n\n    // This function assumes min < max, if this assumption isn't true it will not operate correctly\n\n    if (this.x < min.x) {\n\n      this.x = min.x;\n\n    } else if (this.x > max.x) {\n\n      this.x = max.x;\n\n    }\n\n    if (this.y < min.y) {\n\n      this.y = min.y;\n\n    } else if (this.y > max.y) {\n\n      this.y = max.y;\n\n    }\n\n    if (this.z < min.z) {\n\n      this.z = min.z;\n\n    } else if (this.z > max.z) {\n\n      this.z = max.z;\n\n    }\n\n    return this;\n\n  },\n\n  clampScalar: function () {\n\n    var min, max;\n\n    return function (minVal, maxVal) {\n\n      if (min === undefined) {\n\n        min = new THREE.Vector3();\n        max = new THREE.Vector3();\n\n      }\n\n      min.set(minVal, minVal, minVal);\n      max.set(maxVal, maxVal, maxVal);\n\n      return this.clamp(min, max);\n\n    };\n\n  }(),\n\n  floor: function floor() {\n\n    this.x = Math.floor(this.x);\n    this.y = Math.floor(this.y);\n    this.z = Math.floor(this.z);\n\n    return this;\n\n  },\n\n  ceil: function ceil() {\n\n    this.x = Math.ceil(this.x);\n    this.y = Math.ceil(this.y);\n    this.z = Math.ceil(this.z);\n\n    return this;\n\n  },\n\n  round: function round() {\n\n    this.x = Math.round(this.x);\n    this.y = Math.round(this.y);\n    this.z = Math.round(this.z);\n\n    return this;\n\n  },\n\n  roundToZero: function roundToZero() {\n\n    this.x = this.x < 0 ? Math.ceil(this.x) : Math.floor(this.x);\n    this.y = this.y < 0 ? Math.ceil(this.y) : Math.floor(this.y);\n    this.z = this.z < 0 ? Math.ceil(this.z) : Math.floor(this.z);\n\n    return this;\n\n  },\n\n  negate: function negate() {\n\n    this.x = -this.x;\n    this.y = -this.y;\n    this.z = -this.z;\n\n    return this;\n\n  },\n\n  dot: function dot(v) {\n\n    return this.x * v.x + this.y * v.y + this.z * v.z;\n\n  },\n\n  lengthSq: function lengthSq() {\n\n    return this.x * this.x + this.y * this.y + this.z * this.z;\n\n  },\n\n  length: function length() {\n\n    return Math.sqrt(this.x * this.x + this.y * this.y + this.z * this.z);\n\n  },\n\n  lengthManhattan: function lengthManhattan() {\n\n    return Math.abs(this.x) + Math.abs(this.y) + Math.abs(this.z);\n\n  },\n\n  normalize: function normalize() {\n\n    return this.divideScalar(this.length());\n\n  },\n\n  setLength: function setLength(l) {\n\n    var oldLength = this.length();\n\n    if (oldLength !== 0 && l !== oldLength) {\n\n      this.multiplyScalar(l / oldLength);\n    }\n\n    return this;\n\n  },\n\n  lerp: function lerp(v, alpha) {\n\n    this.x += (v.x - this.x) * alpha;\n    this.y += (v.y - this.y) * alpha;\n    this.z += (v.z - this.z) * alpha;\n\n    return this;\n\n  },\n\n  lerpVectors: function lerpVectors(v1, v2, alpha) {\n\n    this.subVectors(v2, v1).multiplyScalar(alpha).add(v1);\n\n    return this;\n\n  },\n\n  cross: function cross(v, w) {\n\n    if (w !== undefined) {\n\n      THREE.warn('THREE.Vector3: .cross() now only accepts one argument. Use .crossVectors( a, b ) instead.');\n      return this.crossVectors(v, w);\n\n    }\n\n    var x = this.x,y = this.y,z = this.z;\n\n    this.x = y * v.z - z * v.y;\n    this.y = z * v.x - x * v.z;\n    this.z = x * v.y - y * v.x;\n\n    return this;\n\n  },\n\n  crossVectors: function crossVectors(a, b) {\n\n    var ax = a.x,ay = a.y,az = a.z;\n    var bx = b.x,by = b.y,bz = b.z;\n\n    this.x = ay * bz - az * by;\n    this.y = az * bx - ax * bz;\n    this.z = ax * by - ay * bx;\n\n    return this;\n\n  },\n\n  projectOnVector: function () {\n\n    var v1, dot;\n\n    return function (vector) {\n\n      if (v1 === undefined) v1 = new THREE.Vector3();\n\n      v1.copy(vector).normalize();\n\n      dot = this.dot(v1);\n\n      return this.copy(v1).multiplyScalar(dot);\n\n    };\n\n  }(),\n\n  projectOnPlane: function () {\n\n    var v1;\n\n    return function (planeNormal) {\n\n      if (v1 === undefined) v1 = new THREE.Vector3();\n\n      v1.copy(this).projectOnVector(planeNormal);\n\n      return this.sub(v1);\n\n    };\n\n  }(),\n\n  reflect: function () {\n\n    // reflect incident vector off plane orthogonal to normal\n    // normal is assumed to have unit length\n\n    var v1;\n\n    return function (normal) {\n\n      if (v1 === undefined) v1 = new THREE.Vector3();\n\n      return this.sub(v1.copy(normal).multiplyScalar(2 * this.dot(normal)));\n\n    };\n\n  }(),\n\n  angleTo: function angleTo(v) {\n\n    var theta = this.dot(v) / (this.length() * v.length());\n\n    // clamp, to handle numerical problems\n\n    return Math.acos(THREE.Math.clamp(theta, -1, 1));\n\n  },\n\n  distanceTo: function distanceTo(v) {\n\n    return Math.sqrt(this.distanceToSquared(v));\n\n  },\n\n  distanceToSquared: function distanceToSquared(v) {\n\n    var dx = this.x - v.x;\n    var dy = this.y - v.y;\n    var dz = this.z - v.z;\n\n    return dx * dx + dy * dy + dz * dz;\n\n  },\n\n  setEulerFromRotationMatrix: function setEulerFromRotationMatrix(m, order) {\n\n    THREE.error('THREE.Vector3: .setEulerFromRotationMatrix() has been removed. Use Euler.setFromRotationMatrix() instead.');\n\n  },\n\n  setEulerFromQuaternion: function setEulerFromQuaternion(q, order) {\n\n    THREE.error('THREE.Vector3: .setEulerFromQuaternion() has been removed. Use Euler.setFromQuaternion() instead.');\n\n  },\n\n  getPositionFromMatrix: function getPositionFromMatrix(m) {\n\n    THREE.warn('THREE.Vector3: .getPositionFromMatrix() has been renamed to .setFromMatrixPosition().');\n\n    return this.setFromMatrixPosition(m);\n\n  },\n\n  getScaleFromMatrix: function getScaleFromMatrix(m) {\n\n    THREE.warn('THREE.Vector3: .getScaleFromMatrix() has been renamed to .setFromMatrixScale().');\n\n    return this.setFromMatrixScale(m);\n  },\n\n  getColumnFromMatrix: function getColumnFromMatrix(index, matrix) {\n\n    THREE.warn('THREE.Vector3: .getColumnFromMatrix() has been renamed to .setFromMatrixColumn().');\n\n    return this.setFromMatrixColumn(index, matrix);\n\n  },\n\n  setFromMatrixPosition: function setFromMatrixPosition(m) {\n\n    this.x = m.elements[12];\n    this.y = m.elements[13];\n    this.z = m.elements[14];\n\n    return this;\n\n  },\n\n  setFromMatrixScale: function setFromMatrixScale(m) {\n\n    var sx = this.set(m.elements[0], m.elements[1], m.elements[2]).length();\n    var sy = this.set(m.elements[4], m.elements[5], m.elements[6]).length();\n    var sz = this.set(m.elements[8], m.elements[9], m.elements[10]).length();\n\n    this.x = sx;\n    this.y = sy;\n    this.z = sz;\n\n    return this;\n  },\n\n  setFromMatrixColumn: function setFromMatrixColumn(index, matrix) {\n\n    var offset = index * 4;\n\n    var me = matrix.elements;\n\n    this.x = me[offset];\n    this.y = me[offset + 1];\n    this.z = me[offset + 2];\n\n    return this;\n\n  },\n\n  equals: function equals(v) {\n\n    return v.x === this.x && v.y === this.y && v.z === this.z;\n\n  },\n\n  fromArray: function fromArray(array, offset) {\n\n    if (offset === undefined) offset = 0;\n\n    this.x = array[offset];\n    this.y = array[offset + 1];\n    this.z = array[offset + 2];\n\n    return this;\n\n  },\n\n  toArray: function toArray(array, offset) {\n\n    if (array === undefined) array = [];\n    if (offset === undefined) offset = 0;\n\n    array[offset] = this.x;\n    array[offset + 1] = this.y;\n    array[offset + 2] = this.z;\n\n    return array;\n\n  },\n\n  fromAttribute: function fromAttribute(attribute, index, offset) {\n\n    if (offset === undefined) offset = 0;\n\n    index = index * attribute.itemSize + offset;\n\n    this.x = attribute.array[index];\n    this.y = attribute.array[index + 1];\n    this.z = attribute.array[index + 2];\n\n    return this;\n\n  },\n\n  clone: function clone() {\n\n    return new THREE.Vector3(this.x, this.y, this.z);\n\n  } };\n\n\n\n// File:src/math/Vector4.js\n\n/**\n * @author supereggbert / http://www.paulbrunt.co.uk/\n * @author philogb / http://blog.thejit.org/\n * @author mikael emtinger / http://gomo.se/\n * @author egraether / http://egraether.com/\n * @author WestLangley / http://github.com/WestLangley\n */\n\nTHREE.Vector4 = function (x, y, z, w) {\n\n  this.x = x || 0;\n  this.y = y || 0;\n  this.z = z || 0;\n  this.w = w !== undefined ? w : 1;\n\n};\n\nTHREE.Vector4.prototype = {\n\n  constructor: THREE.Vector4,\n\n  set: function set(x, y, z, w) {\n\n    this.x = x;\n    this.y = y;\n    this.z = z;\n    this.w = w;\n\n    return this;\n\n  },\n\n  setX: function setX(x) {\n\n    this.x = x;\n\n    return this;\n\n  },\n\n  setY: function setY(y) {\n\n    this.y = y;\n\n    return this;\n\n  },\n\n  setZ: function setZ(z) {\n\n    this.z = z;\n\n    return this;\n\n  },\n\n  setW: function setW(w) {\n\n    this.w = w;\n\n    return this;\n\n  },\n\n  setComponent: function setComponent(index, value) {\n\n    switch (index) {\n\n      case 0:this.x = value;break;\n      case 1:this.y = value;break;\n      case 2:this.z = value;break;\n      case 3:this.w = value;break;\n      default:throw new Error('index is out of range: ' + index);}\n\n\n\n  },\n\n  getComponent: function getComponent(index) {\n\n    switch (index) {\n\n      case 0:return this.x;\n      case 1:return this.y;\n      case 2:return this.z;\n      case 3:return this.w;\n      default:throw new Error('index is out of range: ' + index);}\n\n\n\n  },\n\n  copy: function copy(v) {\n\n    this.x = v.x;\n    this.y = v.y;\n    this.z = v.z;\n    this.w = v.w !== undefined ? v.w : 1;\n\n    return this;\n\n  },\n\n  add: function add(v, w) {\n\n    if (w !== undefined) {\n\n      THREE.warn('THREE.Vector4: .add() now only accepts one argument. Use .addVectors( a, b ) instead.');\n      return this.addVectors(v, w);\n\n    }\n\n    this.x += v.x;\n    this.y += v.y;\n    this.z += v.z;\n    this.w += v.w;\n\n    return this;\n\n  },\n\n  addScalar: function addScalar(s) {\n\n    this.x += s;\n    this.y += s;\n    this.z += s;\n    this.w += s;\n\n    return this;\n\n  },\n\n  addVectors: function addVectors(a, b) {\n\n    this.x = a.x + b.x;\n    this.y = a.y + b.y;\n    this.z = a.z + b.z;\n    this.w = a.w + b.w;\n\n    return this;\n\n  },\n\n  sub: function sub(v, w) {\n\n    if (w !== undefined) {\n\n      THREE.warn('THREE.Vector4: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.');\n      return this.subVectors(v, w);\n\n    }\n\n    this.x -= v.x;\n    this.y -= v.y;\n    this.z -= v.z;\n    this.w -= v.w;\n\n    return this;\n\n  },\n\n  subScalar: function subScalar(s) {\n\n    this.x -= s;\n    this.y -= s;\n    this.z -= s;\n    this.w -= s;\n\n    return this;\n\n  },\n\n  subVectors: function subVectors(a, b) {\n\n    this.x = a.x - b.x;\n    this.y = a.y - b.y;\n    this.z = a.z - b.z;\n    this.w = a.w - b.w;\n\n    return this;\n\n  },\n\n  multiplyScalar: function multiplyScalar(scalar) {\n\n    this.x *= scalar;\n    this.y *= scalar;\n    this.z *= scalar;\n    this.w *= scalar;\n\n    return this;\n\n  },\n\n  applyMatrix4: function applyMatrix4(m) {\n\n    var x = this.x;\n    var y = this.y;\n    var z = this.z;\n    var w = this.w;\n\n    var e = m.elements;\n\n    this.x = e[0] * x + e[4] * y + e[8] * z + e[12] * w;\n    this.y = e[1] * x + e[5] * y + e[9] * z + e[13] * w;\n    this.z = e[2] * x + e[6] * y + e[10] * z + e[14] * w;\n    this.w = e[3] * x + e[7] * y + e[11] * z + e[15] * w;\n\n    return this;\n\n  },\n\n  divideScalar: function divideScalar(scalar) {\n\n    if (scalar !== 0) {\n\n      var invScalar = 1 / scalar;\n\n      this.x *= invScalar;\n      this.y *= invScalar;\n      this.z *= invScalar;\n      this.w *= invScalar;\n\n    } else {\n\n      this.x = 0;\n      this.y = 0;\n      this.z = 0;\n      this.w = 1;\n\n    }\n\n    return this;\n\n  },\n\n  setAxisAngleFromQuaternion: function setAxisAngleFromQuaternion(q) {\n\n    // http://www.euclideanspace.com/maths/geometry/rotations/conversions/quaternionToAngle/index.htm\n\n    // q is assumed to be normalized\n\n    this.w = 2 * Math.acos(q.w);\n\n    var s = Math.sqrt(1 - q.w * q.w);\n\n    if (s < 0.0001) {\n\n      this.x = 1;\n      this.y = 0;\n      this.z = 0;\n\n    } else {\n\n      this.x = q.x / s;\n      this.y = q.y / s;\n      this.z = q.z / s;\n\n    }\n\n    return this;\n\n  },\n\n  setAxisAngleFromRotationMatrix: function setAxisAngleFromRotationMatrix(m) {\n\n    // http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToAngle/index.htm\n\n    // assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)\n\n    var angle,x,y,z, // variables for result\n    epsilon = 0.01, // margin to allow for rounding errors\n    epsilon2 = 0.1, // margin to distinguish between 0 and 180 degrees\n\n    te = m.elements,\n\n    m11 = te[0],m12 = te[4],m13 = te[8],\n    m21 = te[1],m22 = te[5],m23 = te[9],\n    m31 = te[2],m32 = te[6],m33 = te[10];\n\n    if (Math.abs(m12 - m21) < epsilon &&\n    Math.abs(m13 - m31) < epsilon &&\n    Math.abs(m23 - m32) < epsilon) {\n\n      // singularity found\n      // first check for identity matrix which must have +1 for all terms\n      // in leading diagonal and zero in other terms\n\n      if (Math.abs(m12 + m21) < epsilon2 &&\n      Math.abs(m13 + m31) < epsilon2 &&\n      Math.abs(m23 + m32) < epsilon2 &&\n      Math.abs(m11 + m22 + m33 - 3) < epsilon2) {\n\n        // this singularity is identity matrix so angle = 0\n\n        this.set(1, 0, 0, 0);\n\n        return this; // zero angle, arbitrary axis\n\n      }\n\n      // otherwise this singularity is angle = 180\n\n      angle = Math.PI;\n\n      var xx = (m11 + 1) / 2;\n      var yy = (m22 + 1) / 2;\n      var zz = (m33 + 1) / 2;\n      var xy = (m12 + m21) / 4;\n      var xz = (m13 + m31) / 4;\n      var yz = (m23 + m32) / 4;\n\n      if (xx > yy && xx > zz) {// m11 is the largest diagonal term\n\n        if (xx < epsilon) {\n\n          x = 0;\n          y = 0.707106781;\n          z = 0.707106781;\n\n        } else {\n\n          x = Math.sqrt(xx);\n          y = xy / x;\n          z = xz / x;\n\n        }\n\n      } else if (yy > zz) {// m22 is the largest diagonal term\n\n        if (yy < epsilon) {\n\n          x = 0.707106781;\n          y = 0;\n          z = 0.707106781;\n\n        } else {\n\n          y = Math.sqrt(yy);\n          x = xy / y;\n          z = yz / y;\n\n        }\n\n      } else {// m33 is the largest diagonal term so base result on this\n\n        if (zz < epsilon) {\n\n          x = 0.707106781;\n          y = 0.707106781;\n          z = 0;\n\n        } else {\n\n          z = Math.sqrt(zz);\n          x = xz / z;\n          y = yz / z;\n\n        }\n\n      }\n\n      this.set(x, y, z, angle);\n\n      return this; // return 180 deg rotation\n\n    }\n\n    // as we have reached here there are no singularities so we can handle normally\n\n    var s = Math.sqrt((m32 - m23) * (m32 - m23) +\n    (m13 - m31) * (m13 - m31) +\n    (m21 - m12) * (m21 - m12)); // used to normalize\n\n    if (Math.abs(s) < 0.001) s = 1;\n\n    // prevent divide by zero, should not happen if matrix is orthogonal and should be\n    // caught by singularity test above, but I've left it in just in case\n\n    this.x = (m32 - m23) / s;\n    this.y = (m13 - m31) / s;\n    this.z = (m21 - m12) / s;\n    this.w = Math.acos((m11 + m22 + m33 - 1) / 2);\n\n    return this;\n\n  },\n\n  min: function min(v) {\n\n    if (this.x > v.x) {\n\n      this.x = v.x;\n\n    }\n\n    if (this.y > v.y) {\n\n      this.y = v.y;\n\n    }\n\n    if (this.z > v.z) {\n\n      this.z = v.z;\n\n    }\n\n    if (this.w > v.w) {\n\n      this.w = v.w;\n\n    }\n\n    return this;\n\n  },\n\n  max: function max(v) {\n\n    if (this.x < v.x) {\n\n      this.x = v.x;\n\n    }\n\n    if (this.y < v.y) {\n\n      this.y = v.y;\n\n    }\n\n    if (this.z < v.z) {\n\n      this.z = v.z;\n\n    }\n\n    if (this.w < v.w) {\n\n      this.w = v.w;\n\n    }\n\n    return this;\n\n  },\n\n  clamp: function clamp(min, max) {\n\n    // This function assumes min < max, if this assumption isn't true it will not operate correctly\n\n    if (this.x < min.x) {\n\n      this.x = min.x;\n\n    } else if (this.x > max.x) {\n\n      this.x = max.x;\n\n    }\n\n    if (this.y < min.y) {\n\n      this.y = min.y;\n\n    } else if (this.y > max.y) {\n\n      this.y = max.y;\n\n    }\n\n    if (this.z < min.z) {\n\n      this.z = min.z;\n\n    } else if (this.z > max.z) {\n\n      this.z = max.z;\n\n    }\n\n    if (this.w < min.w) {\n\n      this.w = min.w;\n\n    } else if (this.w > max.w) {\n\n      this.w = max.w;\n\n    }\n\n    return this;\n\n  },\n\n  clampScalar: function () {\n\n    var min, max;\n\n    return function (minVal, maxVal) {\n\n      if (min === undefined) {\n\n        min = new THREE.Vector4();\n        max = new THREE.Vector4();\n\n      }\n\n      min.set(minVal, minVal, minVal, minVal);\n      max.set(maxVal, maxVal, maxVal, maxVal);\n\n      return this.clamp(min, max);\n\n    };\n\n  }(),\n\n  floor: function floor() {\n\n    this.x = Math.floor(this.x);\n    this.y = Math.floor(this.y);\n    this.z = Math.floor(this.z);\n    this.w = Math.floor(this.w);\n\n    return this;\n\n  },\n\n  ceil: function ceil() {\n\n    this.x = Math.ceil(this.x);\n    this.y = Math.ceil(this.y);\n    this.z = Math.ceil(this.z);\n    this.w = Math.ceil(this.w);\n\n    return this;\n\n  },\n\n  round: function round() {\n\n    this.x = Math.round(this.x);\n    this.y = Math.round(this.y);\n    this.z = Math.round(this.z);\n    this.w = Math.round(this.w);\n\n    return this;\n\n  },\n\n  roundToZero: function roundToZero() {\n\n    this.x = this.x < 0 ? Math.ceil(this.x) : Math.floor(this.x);\n    this.y = this.y < 0 ? Math.ceil(this.y) : Math.floor(this.y);\n    this.z = this.z < 0 ? Math.ceil(this.z) : Math.floor(this.z);\n    this.w = this.w < 0 ? Math.ceil(this.w) : Math.floor(this.w);\n\n    return this;\n\n  },\n\n  negate: function negate() {\n\n    this.x = -this.x;\n    this.y = -this.y;\n    this.z = -this.z;\n    this.w = -this.w;\n\n    return this;\n\n  },\n\n  dot: function dot(v) {\n\n    return this.x * v.x + this.y * v.y + this.z * v.z + this.w * v.w;\n\n  },\n\n  lengthSq: function lengthSq() {\n\n    return this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w;\n\n  },\n\n  length: function length() {\n\n    return Math.sqrt(this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w);\n\n  },\n\n  lengthManhattan: function lengthManhattan() {\n\n    return Math.abs(this.x) + Math.abs(this.y) + Math.abs(this.z) + Math.abs(this.w);\n\n  },\n\n  normalize: function normalize() {\n\n    return this.divideScalar(this.length());\n\n  },\n\n  setLength: function setLength(l) {\n\n    var oldLength = this.length();\n\n    if (oldLength !== 0 && l !== oldLength) {\n\n      this.multiplyScalar(l / oldLength);\n\n    }\n\n    return this;\n\n  },\n\n  lerp: function lerp(v, alpha) {\n\n    this.x += (v.x - this.x) * alpha;\n    this.y += (v.y - this.y) * alpha;\n    this.z += (v.z - this.z) * alpha;\n    this.w += (v.w - this.w) * alpha;\n\n    return this;\n\n  },\n\n  lerpVectors: function lerpVectors(v1, v2, alpha) {\n\n    this.subVectors(v2, v1).multiplyScalar(alpha).add(v1);\n\n    return this;\n\n  },\n\n  equals: function equals(v) {\n\n    return v.x === this.x && v.y === this.y && v.z === this.z && v.w === this.w;\n\n  },\n\n  fromArray: function fromArray(array, offset) {\n\n    if (offset === undefined) offset = 0;\n\n    this.x = array[offset];\n    this.y = array[offset + 1];\n    this.z = array[offset + 2];\n    this.w = array[offset + 3];\n\n    return this;\n\n  },\n\n  toArray: function toArray(array, offset) {\n\n    if (array === undefined) array = [];\n    if (offset === undefined) offset = 0;\n\n    array[offset] = this.x;\n    array[offset + 1] = this.y;\n    array[offset + 2] = this.z;\n    array[offset + 3] = this.w;\n\n    return array;\n\n  },\n\n  fromAttribute: function fromAttribute(attribute, index, offset) {\n\n    if (offset === undefined) offset = 0;\n\n    index = index * attribute.itemSize + offset;\n\n    this.x = attribute.array[index];\n    this.y = attribute.array[index + 1];\n    this.z = attribute.array[index + 2];\n    this.w = attribute.array[index + 3];\n\n    return this;\n\n  },\n\n  clone: function clone() {\n\n    return new THREE.Vector4(this.x, this.y, this.z, this.w);\n\n  } };\n\n\n\n// File:src/math/Euler.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author WestLangley / http://github.com/WestLangley\n * @author bhouston / http://exocortex.com\n */\n\nTHREE.Euler = function (x, y, z, order) {\n\n  this._x = x || 0;\n  this._y = y || 0;\n  this._z = z || 0;\n  this._order = order || THREE.Euler.DefaultOrder;\n\n};\n\nTHREE.Euler.RotationOrders = ['XYZ', 'YZX', 'ZXY', 'XZY', 'YXZ', 'ZYX'];\n\nTHREE.Euler.DefaultOrder = 'XYZ';\n\nTHREE.Euler.prototype = {\n\n  constructor: THREE.Euler,\n\n  _x: 0, _y: 0, _z: 0, _order: THREE.Euler.DefaultOrder,\n\n  get x() {\n\n    return this._x;\n\n  },\n\n  set x(value) {\n\n    this._x = value;\n    this.onChangeCallback();\n\n  },\n\n  get y() {\n\n    return this._y;\n\n  },\n\n  set y(value) {\n\n    this._y = value;\n    this.onChangeCallback();\n\n  },\n\n  get z() {\n\n    return this._z;\n\n  },\n\n  set z(value) {\n\n    this._z = value;\n    this.onChangeCallback();\n\n  },\n\n  get order() {\n\n    return this._order;\n\n  },\n\n  set order(value) {\n\n    this._order = value;\n    this.onChangeCallback();\n\n  },\n\n  set: function set(x, y, z, order) {\n\n    this._x = x;\n    this._y = y;\n    this._z = z;\n    this._order = order || this._order;\n\n    this.onChangeCallback();\n\n    return this;\n\n  },\n\n  copy: function copy(euler) {\n\n    this._x = euler._x;\n    this._y = euler._y;\n    this._z = euler._z;\n    this._order = euler._order;\n\n    this.onChangeCallback();\n\n    return this;\n\n  },\n\n  setFromRotationMatrix: function setFromRotationMatrix(m, order, update) {\n\n    var clamp = THREE.Math.clamp;\n\n    // assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)\n\n    var te = m.elements;\n    var m11 = te[0],m12 = te[4],m13 = te[8];\n    var m21 = te[1],m22 = te[5],m23 = te[9];\n    var m31 = te[2],m32 = te[6],m33 = te[10];\n\n    order = order || this._order;\n\n    if (order === 'XYZ') {\n\n      this._y = Math.asin(clamp(m13, -1, 1));\n\n      if (Math.abs(m13) < 0.99999) {\n\n        this._x = Math.atan2(-m23, m33);\n        this._z = Math.atan2(-m12, m11);\n\n      } else {\n\n        this._x = Math.atan2(m32, m22);\n        this._z = 0;\n\n      }\n\n    } else if (order === 'YXZ') {\n\n      this._x = Math.asin(-clamp(m23, -1, 1));\n\n      if (Math.abs(m23) < 0.99999) {\n\n        this._y = Math.atan2(m13, m33);\n        this._z = Math.atan2(m21, m22);\n\n      } else {\n\n        this._y = Math.atan2(-m31, m11);\n        this._z = 0;\n\n      }\n\n    } else if (order === 'ZXY') {\n\n      this._x = Math.asin(clamp(m32, -1, 1));\n\n      if (Math.abs(m32) < 0.99999) {\n\n        this._y = Math.atan2(-m31, m33);\n        this._z = Math.atan2(-m12, m22);\n\n      } else {\n\n        this._y = 0;\n        this._z = Math.atan2(m21, m11);\n\n      }\n\n    } else if (order === 'ZYX') {\n\n      this._y = Math.asin(-clamp(m31, -1, 1));\n\n      if (Math.abs(m31) < 0.99999) {\n\n        this._x = Math.atan2(m32, m33);\n        this._z = Math.atan2(m21, m11);\n\n      } else {\n\n        this._x = 0;\n        this._z = Math.atan2(-m12, m22);\n\n      }\n\n    } else if (order === 'YZX') {\n\n      this._z = Math.asin(clamp(m21, -1, 1));\n\n      if (Math.abs(m21) < 0.99999) {\n\n        this._x = Math.atan2(-m23, m22);\n        this._y = Math.atan2(-m31, m11);\n\n      } else {\n\n        this._x = 0;\n        this._y = Math.atan2(m13, m33);\n\n      }\n\n    } else if (order === 'XZY') {\n\n      this._z = Math.asin(-clamp(m12, -1, 1));\n\n      if (Math.abs(m12) < 0.99999) {\n\n        this._x = Math.atan2(m32, m22);\n        this._y = Math.atan2(m13, m11);\n\n      } else {\n\n        this._x = Math.atan2(-m23, m33);\n        this._y = 0;\n\n      }\n\n    } else {\n\n      THREE.warn('THREE.Euler: .setFromRotationMatrix() given unsupported order: ' + order);\n\n    }\n\n    this._order = order;\n\n    if (update !== false) this.onChangeCallback();\n\n    return this;\n\n  },\n\n  setFromQuaternion: function () {\n\n    var matrix;\n\n    return function (q, order, update) {\n\n      if (matrix === undefined) matrix = new THREE.Matrix4();\n      matrix.makeRotationFromQuaternion(q);\n      this.setFromRotationMatrix(matrix, order, update);\n\n      return this;\n\n    };\n\n  }(),\n\n  setFromVector3: function setFromVector3(v, order) {\n\n    return this.set(v.x, v.y, v.z, order || this._order);\n\n  },\n\n  reorder: function () {\n\n    // WARNING: this discards revolution information -bhouston\n\n    var q = new THREE.Quaternion();\n\n    return function (newOrder) {\n\n      q.setFromEuler(this);\n      this.setFromQuaternion(q, newOrder);\n\n    };\n\n  }(),\n\n  equals: function equals(euler) {\n\n    return euler._x === this._x && euler._y === this._y && euler._z === this._z && euler._order === this._order;\n\n  },\n\n  fromArray: function fromArray(array) {\n\n    this._x = array[0];\n    this._y = array[1];\n    this._z = array[2];\n    if (array[3] !== undefined) this._order = array[3];\n\n    this.onChangeCallback();\n\n    return this;\n\n  },\n\n  toArray: function toArray(array, offset) {\n\n    if (array === undefined) array = [];\n    if (offset === undefined) offset = 0;\n\n    array[offset] = this._x;\n    array[offset + 1] = this._y;\n    array[offset + 2] = this._z;\n    array[offset + 3] = this._order;\n\n    return array;\n  },\n\n  toVector3: function toVector3(optionalResult) {\n\n    if (optionalResult) {\n\n      return optionalResult.set(this._x, this._y, this._z);\n\n    } else {\n\n      return new THREE.Vector3(this._x, this._y, this._z);\n\n    }\n\n  },\n\n  onChange: function onChange(callback) {\n\n    this.onChangeCallback = callback;\n\n    return this;\n\n  },\n\n  onChangeCallback: function onChangeCallback() {},\n\n  clone: function clone() {\n\n    return new THREE.Euler(this._x, this._y, this._z, this._order);\n\n  } };\n\n\n\n// File:src/math/Line3.js\n\n/**\n * @author bhouston / http://exocortex.com\n */\n\nTHREE.Line3 = function (start, end) {\n\n  this.start = start !== undefined ? start : new THREE.Vector3();\n  this.end = end !== undefined ? end : new THREE.Vector3();\n\n};\n\nTHREE.Line3.prototype = {\n\n  constructor: THREE.Line3,\n\n  set: function set(start, end) {\n\n    this.start.copy(start);\n    this.end.copy(end);\n\n    return this;\n\n  },\n\n  copy: function copy(line) {\n\n    this.start.copy(line.start);\n    this.end.copy(line.end);\n\n    return this;\n\n  },\n\n  center: function center(optionalTarget) {\n\n    var result = optionalTarget || new THREE.Vector3();\n    return result.addVectors(this.start, this.end).multiplyScalar(0.5);\n\n  },\n\n  delta: function delta(optionalTarget) {\n\n    var result = optionalTarget || new THREE.Vector3();\n    return result.subVectors(this.end, this.start);\n\n  },\n\n  distanceSq: function distanceSq() {\n\n    return this.start.distanceToSquared(this.end);\n\n  },\n\n  distance: function distance() {\n\n    return this.start.distanceTo(this.end);\n\n  },\n\n  at: function at(t, optionalTarget) {\n\n    var result = optionalTarget || new THREE.Vector3();\n\n    return this.delta(result).multiplyScalar(t).add(this.start);\n\n  },\n\n  closestPointToPointParameter: function () {\n\n    var startP = new THREE.Vector3();\n    var startEnd = new THREE.Vector3();\n\n    return function (point, clampToLine) {\n\n      startP.subVectors(point, this.start);\n      startEnd.subVectors(this.end, this.start);\n\n      var startEnd2 = startEnd.dot(startEnd);\n      var startEnd_startP = startEnd.dot(startP);\n\n      var t = startEnd_startP / startEnd2;\n\n      if (clampToLine) {\n\n        t = THREE.Math.clamp(t, 0, 1);\n\n      }\n\n      return t;\n\n    };\n\n  }(),\n\n  closestPointToPoint: function closestPointToPoint(point, clampToLine, optionalTarget) {\n\n    var t = this.closestPointToPointParameter(point, clampToLine);\n\n    var result = optionalTarget || new THREE.Vector3();\n\n    return this.delta(result).multiplyScalar(t).add(this.start);\n\n  },\n\n  applyMatrix4: function applyMatrix4(matrix) {\n\n    this.start.applyMatrix4(matrix);\n    this.end.applyMatrix4(matrix);\n\n    return this;\n\n  },\n\n  equals: function equals(line) {\n\n    return line.start.equals(this.start) && line.end.equals(this.end);\n\n  },\n\n  clone: function clone() {\n\n    return new THREE.Line3().copy(this);\n\n  } };\n\n\n\n// File:src/math/Box2.js\n\n/**\n * @author bhouston / http://exocortex.com\n */\n\nTHREE.Box2 = function (min, max) {\n\n  this.min = min !== undefined ? min : new THREE.Vector2(Infinity, Infinity);\n  this.max = max !== undefined ? max : new THREE.Vector2(-Infinity, -Infinity);\n\n};\n\nTHREE.Box2.prototype = {\n\n  constructor: THREE.Box2,\n\n  set: function set(min, max) {\n\n    this.min.copy(min);\n    this.max.copy(max);\n\n    return this;\n\n  },\n\n  setFromPoints: function setFromPoints(points) {\n\n    this.makeEmpty();\n\n    for (var i = 0, il = points.length; i < il; i++) {\n\n      this.expandByPoint(points[i]);\n\n    }\n\n    return this;\n\n  },\n\n  setFromCenterAndSize: function () {\n\n    var v1 = new THREE.Vector2();\n\n    return function (center, size) {\n\n      var halfSize = v1.copy(size).multiplyScalar(0.5);\n      this.min.copy(center).sub(halfSize);\n      this.max.copy(center).add(halfSize);\n\n      return this;\n\n    };\n\n  }(),\n\n  copy: function copy(box) {\n\n    this.min.copy(box.min);\n    this.max.copy(box.max);\n\n    return this;\n\n  },\n\n  makeEmpty: function makeEmpty() {\n\n    this.min.x = this.min.y = Infinity;\n    this.max.x = this.max.y = -Infinity;\n\n    return this;\n\n  },\n\n  empty: function empty() {\n\n    // this is a more robust check for empty than ( volume <= 0 ) because volume can get positive with two negative axes\n\n    return this.max.x < this.min.x || this.max.y < this.min.y;\n\n  },\n\n  center: function center(optionalTarget) {\n\n    var result = optionalTarget || new THREE.Vector2();\n    return result.addVectors(this.min, this.max).multiplyScalar(0.5);\n\n  },\n\n  size: function size(optionalTarget) {\n\n    var result = optionalTarget || new THREE.Vector2();\n    return result.subVectors(this.max, this.min);\n\n  },\n\n  expandByPoint: function expandByPoint(point) {\n\n    this.min.min(point);\n    this.max.max(point);\n\n    return this;\n  },\n\n  expandByVector: function expandByVector(vector) {\n\n    this.min.sub(vector);\n    this.max.add(vector);\n\n    return this;\n  },\n\n  expandByScalar: function expandByScalar(scalar) {\n\n    this.min.addScalar(-scalar);\n    this.max.addScalar(scalar);\n\n    return this;\n  },\n\n  containsPoint: function containsPoint(point) {\n\n    if (point.x < this.min.x || point.x > this.max.x ||\n    point.y < this.min.y || point.y > this.max.y) {\n\n      return false;\n\n    }\n\n    return true;\n\n  },\n\n  containsBox: function containsBox(box) {\n\n    if (this.min.x <= box.min.x && box.max.x <= this.max.x &&\n    this.min.y <= box.min.y && box.max.y <= this.max.y) {\n\n      return true;\n\n    }\n\n    return false;\n\n  },\n\n  getParameter: function getParameter(point, optionalTarget) {\n\n    // This can potentially have a divide by zero if the box\n    // has a size dimension of 0.\n\n    var result = optionalTarget || new THREE.Vector2();\n\n    return result.set(\n    (point.x - this.min.x) / (this.max.x - this.min.x),\n    (point.y - this.min.y) / (this.max.y - this.min.y));\n\n\n  },\n\n  isIntersectionBox: function isIntersectionBox(box) {\n\n    // using 6 splitting planes to rule out intersections.\n\n    if (box.max.x < this.min.x || box.min.x > this.max.x ||\n    box.max.y < this.min.y || box.min.y > this.max.y) {\n\n      return false;\n\n    }\n\n    return true;\n\n  },\n\n  clampPoint: function clampPoint(point, optionalTarget) {\n\n    var result = optionalTarget || new THREE.Vector2();\n    return result.copy(point).clamp(this.min, this.max);\n\n  },\n\n  distanceToPoint: function () {\n\n    var v1 = new THREE.Vector2();\n\n    return function (point) {\n\n      var clampedPoint = v1.copy(point).clamp(this.min, this.max);\n      return clampedPoint.sub(point).length();\n\n    };\n\n  }(),\n\n  intersect: function intersect(box) {\n\n    this.min.max(box.min);\n    this.max.min(box.max);\n\n    return this;\n\n  },\n\n  union: function union(box) {\n\n    this.min.min(box.min);\n    this.max.max(box.max);\n\n    return this;\n\n  },\n\n  translate: function translate(offset) {\n\n    this.min.add(offset);\n    this.max.add(offset);\n\n    return this;\n\n  },\n\n  equals: function equals(box) {\n\n    return box.min.equals(this.min) && box.max.equals(this.max);\n\n  },\n\n  clone: function clone() {\n\n    return new THREE.Box2().copy(this);\n\n  } };\n\n\n\n// File:src/math/Box3.js\n\n/**\n * @author bhouston / http://exocortex.com\n * @author WestLangley / http://github.com/WestLangley\n */\n\nTHREE.Box3 = function (min, max) {\n\n  this.min = min !== undefined ? min : new THREE.Vector3(Infinity, Infinity, Infinity);\n  this.max = max !== undefined ? max : new THREE.Vector3(-Infinity, -Infinity, -Infinity);\n\n};\n\nTHREE.Box3.prototype = {\n\n  constructor: THREE.Box3,\n\n  set: function set(min, max) {\n\n    this.min.copy(min);\n    this.max.copy(max);\n\n    return this;\n\n  },\n\n  setFromPoints: function setFromPoints(points) {\n\n    this.makeEmpty();\n\n    for (var i = 0, il = points.length; i < il; i++) {\n\n      this.expandByPoint(points[i]);\n\n    }\n\n    return this;\n\n  },\n\n  setFromCenterAndSize: function () {\n\n    var v1 = new THREE.Vector3();\n\n    return function (center, size) {\n\n      var halfSize = v1.copy(size).multiplyScalar(0.5);\n\n      this.min.copy(center).sub(halfSize);\n      this.max.copy(center).add(halfSize);\n\n      return this;\n\n    };\n\n  }(),\n\n  setFromObject: function () {\n\n    // Computes the world-axis-aligned bounding box of an object (including its children),\n    // accounting for both the object's, and childrens', world transforms\n\n    var v1 = new THREE.Vector3();\n\n    return function (object) {\n\n      var scope = this;\n\n      object.updateMatrixWorld(true);\n\n      this.makeEmpty();\n\n      object.traverse(function (node) {\n\n        var geometry = node.geometry;\n\n        if (geometry !== undefined) {\n\n          if (geometry instanceof THREE.Geometry) {\n\n            var vertices = geometry.vertices;\n\n            for (var i = 0, il = vertices.length; i < il; i++) {\n\n              v1.copy(vertices[i]);\n\n              v1.applyMatrix4(node.matrixWorld);\n\n              scope.expandByPoint(v1);\n\n            }\n\n          } else if (geometry instanceof THREE.BufferGeometry && geometry.attributes['position'] !== undefined) {\n\n            var positions = geometry.attributes['position'].array;\n\n            for (var i = 0, il = positions.length; i < il; i += 3) {\n\n              v1.set(positions[i], positions[i + 1], positions[i + 2]);\n\n              v1.applyMatrix4(node.matrixWorld);\n\n              scope.expandByPoint(v1);\n\n            }\n\n          }\n\n        }\n\n      });\n\n      return this;\n\n    };\n\n  }(),\n\n  copy: function copy(box) {\n\n    this.min.copy(box.min);\n    this.max.copy(box.max);\n\n    return this;\n\n  },\n\n  makeEmpty: function makeEmpty() {\n\n    this.min.x = this.min.y = this.min.z = Infinity;\n    this.max.x = this.max.y = this.max.z = -Infinity;\n\n    return this;\n\n  },\n\n  empty: function empty() {\n\n    // this is a more robust check for empty than ( volume <= 0 ) because volume can get positive with two negative axes\n\n    return this.max.x < this.min.x || this.max.y < this.min.y || this.max.z < this.min.z;\n\n  },\n\n  center: function center(optionalTarget) {\n\n    var result = optionalTarget || new THREE.Vector3();\n    return result.addVectors(this.min, this.max).multiplyScalar(0.5);\n\n  },\n\n  size: function size(optionalTarget) {\n\n    var result = optionalTarget || new THREE.Vector3();\n    return result.subVectors(this.max, this.min);\n\n  },\n\n  expandByPoint: function expandByPoint(point) {\n\n    this.min.min(point);\n    this.max.max(point);\n\n    return this;\n\n  },\n\n  expandByVector: function expandByVector(vector) {\n\n    this.min.sub(vector);\n    this.max.add(vector);\n\n    return this;\n\n  },\n\n  expandByScalar: function expandByScalar(scalar) {\n\n    this.min.addScalar(-scalar);\n    this.max.addScalar(scalar);\n\n    return this;\n\n  },\n\n  containsPoint: function containsPoint(point) {\n\n    if (point.x < this.min.x || point.x > this.max.x ||\n    point.y < this.min.y || point.y > this.max.y ||\n    point.z < this.min.z || point.z > this.max.z) {\n\n      return false;\n\n    }\n\n    return true;\n\n  },\n\n  containsBox: function containsBox(box) {\n\n    if (this.min.x <= box.min.x && box.max.x <= this.max.x &&\n    this.min.y <= box.min.y && box.max.y <= this.max.y &&\n    this.min.z <= box.min.z && box.max.z <= this.max.z) {\n\n      return true;\n\n    }\n\n    return false;\n\n  },\n\n  getParameter: function getParameter(point, optionalTarget) {\n\n    // This can potentially have a divide by zero if the box\n    // has a size dimension of 0.\n\n    var result = optionalTarget || new THREE.Vector3();\n\n    return result.set(\n    (point.x - this.min.x) / (this.max.x - this.min.x),\n    (point.y - this.min.y) / (this.max.y - this.min.y),\n    (point.z - this.min.z) / (this.max.z - this.min.z));\n\n\n  },\n\n  isIntersectionBox: function isIntersectionBox(box) {\n\n    // using 6 splitting planes to rule out intersections.\n\n    if (box.max.x < this.min.x || box.min.x > this.max.x ||\n    box.max.y < this.min.y || box.min.y > this.max.y ||\n    box.max.z < this.min.z || box.min.z > this.max.z) {\n\n      return false;\n\n    }\n\n    return true;\n\n  },\n\n  clampPoint: function clampPoint(point, optionalTarget) {\n\n    var result = optionalTarget || new THREE.Vector3();\n    return result.copy(point).clamp(this.min, this.max);\n\n  },\n\n  distanceToPoint: function () {\n\n    var v1 = new THREE.Vector3();\n\n    return function (point) {\n\n      var clampedPoint = v1.copy(point).clamp(this.min, this.max);\n      return clampedPoint.sub(point).length();\n\n    };\n\n  }(),\n\n  getBoundingSphere: function () {\n\n    var v1 = new THREE.Vector3();\n\n    return function (optionalTarget) {\n\n      var result = optionalTarget || new THREE.Sphere();\n\n      result.center = this.center();\n      result.radius = this.size(v1).length() * 0.5;\n\n      return result;\n\n    };\n\n  }(),\n\n  intersect: function intersect(box) {\n\n    this.min.max(box.min);\n    this.max.min(box.max);\n\n    return this;\n\n  },\n\n  union: function union(box) {\n\n    this.min.min(box.min);\n    this.max.max(box.max);\n\n    return this;\n\n  },\n\n  applyMatrix4: function () {\n\n    var points = [\n    new THREE.Vector3(),\n    new THREE.Vector3(),\n    new THREE.Vector3(),\n    new THREE.Vector3(),\n    new THREE.Vector3(),\n    new THREE.Vector3(),\n    new THREE.Vector3(),\n    new THREE.Vector3()];\n\n\n    return function (matrix) {\n\n      // NOTE: I am using a binary pattern to specify all 2^3 combinations below\n      points[0].set(this.min.x, this.min.y, this.min.z).applyMatrix4(matrix); // 000\n      points[1].set(this.min.x, this.min.y, this.max.z).applyMatrix4(matrix); // 001\n      points[2].set(this.min.x, this.max.y, this.min.z).applyMatrix4(matrix); // 010\n      points[3].set(this.min.x, this.max.y, this.max.z).applyMatrix4(matrix); // 011\n      points[4].set(this.max.x, this.min.y, this.min.z).applyMatrix4(matrix); // 100\n      points[5].set(this.max.x, this.min.y, this.max.z).applyMatrix4(matrix); // 101\n      points[6].set(this.max.x, this.max.y, this.min.z).applyMatrix4(matrix); // 110\n      points[7].set(this.max.x, this.max.y, this.max.z).applyMatrix4(matrix); // 111\n\n      this.makeEmpty();\n      this.setFromPoints(points);\n\n      return this;\n\n    };\n\n  }(),\n\n  translate: function translate(offset) {\n\n    this.min.add(offset);\n    this.max.add(offset);\n\n    return this;\n\n  },\n\n  equals: function equals(box) {\n\n    return box.min.equals(this.min) && box.max.equals(this.max);\n\n  },\n\n  clone: function clone() {\n\n    return new THREE.Box3().copy(this);\n\n  } };\n\n\n\n// File:src/math/Matrix3.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n * @author WestLangley / http://github.com/WestLangley\n * @author bhouston / http://exocortex.com\n */\n\nTHREE.Matrix3 = function () {\n\n  this.elements = new Float32Array([\n\n  1, 0, 0,\n  0, 1, 0,\n  0, 0, 1]);\n\n\n\n  if (arguments.length > 0) {\n\n    THREE.error('THREE.Matrix3: the constructor no longer reads arguments. use .set() instead.');\n\n  }\n\n};\n\nTHREE.Matrix3.prototype = {\n\n  constructor: THREE.Matrix3,\n\n  set: function set(n11, n12, n13, n21, n22, n23, n31, n32, n33) {\n\n    var te = this.elements;\n\n    te[0] = n11;te[3] = n12;te[6] = n13;\n    te[1] = n21;te[4] = n22;te[7] = n23;\n    te[2] = n31;te[5] = n32;te[8] = n33;\n\n    return this;\n\n  },\n\n  identity: function identity() {\n\n    this.set(\n\n    1, 0, 0,\n    0, 1, 0,\n    0, 0, 1);\n\n\n\n    return this;\n\n  },\n\n  copy: function copy(m) {\n\n    var me = m.elements;\n\n    this.set(\n\n    me[0], me[3], me[6],\n    me[1], me[4], me[7],\n    me[2], me[5], me[8]);\n\n\n\n    return this;\n\n  },\n\n  multiplyVector3: function multiplyVector3(vector) {\n\n    THREE.warn('THREE.Matrix3: .multiplyVector3() has been removed. Use vector.applyMatrix3( matrix ) instead.');\n    return vector.applyMatrix3(this);\n\n  },\n\n  multiplyVector3Array: function multiplyVector3Array(a) {\n\n    THREE.warn('THREE.Matrix3: .multiplyVector3Array() has been renamed. Use matrix.applyToVector3Array( array ) instead.');\n    return this.applyToVector3Array(a);\n\n  },\n\n  applyToVector3Array: function () {\n\n    var v1 = new THREE.Vector3();\n\n    return function (array, offset, length) {\n\n      if (offset === undefined) offset = 0;\n      if (length === undefined) length = array.length;\n\n      for (var i = 0, j = offset; i < length; i += 3, j += 3) {\n\n        v1.x = array[j];\n        v1.y = array[j + 1];\n        v1.z = array[j + 2];\n\n        v1.applyMatrix3(this);\n\n        array[j] = v1.x;\n        array[j + 1] = v1.y;\n        array[j + 2] = v1.z;\n\n      }\n\n      return array;\n\n    };\n\n  }(),\n\n  multiplyScalar: function multiplyScalar(s) {\n\n    var te = this.elements;\n\n    te[0] *= s;te[3] *= s;te[6] *= s;\n    te[1] *= s;te[4] *= s;te[7] *= s;\n    te[2] *= s;te[5] *= s;te[8] *= s;\n\n    return this;\n\n  },\n\n  determinant: function determinant() {\n\n    var te = this.elements;\n\n    var a = te[0],b = te[1],c = te[2],\n    d = te[3],e = te[4],f = te[5],\n    g = te[6],h = te[7],i = te[8];\n\n    return a * e * i - a * f * h - b * d * i + b * f * g + c * d * h - c * e * g;\n\n  },\n\n  getInverse: function getInverse(matrix, throwOnInvertible) {\n\n    // input: THREE.Matrix4\n    // ( based on http://code.google.com/p/webgl-mjs/ )\n\n    var me = matrix.elements;\n    var te = this.elements;\n\n    te[0] = me[10] * me[5] - me[6] * me[9];\n    te[1] = -me[10] * me[1] + me[2] * me[9];\n    te[2] = me[6] * me[1] - me[2] * me[5];\n    te[3] = -me[10] * me[4] + me[6] * me[8];\n    te[4] = me[10] * me[0] - me[2] * me[8];\n    te[5] = -me[6] * me[0] + me[2] * me[4];\n    te[6] = me[9] * me[4] - me[5] * me[8];\n    te[7] = -me[9] * me[0] + me[1] * me[8];\n    te[8] = me[5] * me[0] - me[1] * me[4];\n\n    var det = me[0] * te[0] + me[1] * te[3] + me[2] * te[6];\n\n    // no inverse\n\n    if (det === 0) {\n\n      var msg = \"Matrix3.getInverse(): can't invert matrix, determinant is 0\";\n\n      if (throwOnInvertible || false) {\n\n        throw new Error(msg);\n\n      } else {\n\n        THREE.warn(msg);\n\n      }\n\n      this.identity();\n\n      return this;\n\n    }\n\n    this.multiplyScalar(1.0 / det);\n\n    return this;\n\n  },\n\n  transpose: function transpose() {\n\n    var tmp,m = this.elements;\n\n    tmp = m[1];m[1] = m[3];m[3] = tmp;\n    tmp = m[2];m[2] = m[6];m[6] = tmp;\n    tmp = m[5];m[5] = m[7];m[7] = tmp;\n\n    return this;\n\n  },\n\n  flattenToArrayOffset: function flattenToArrayOffset(array, offset) {\n\n    var te = this.elements;\n\n    array[offset] = te[0];\n    array[offset + 1] = te[1];\n    array[offset + 2] = te[2];\n\n    array[offset + 3] = te[3];\n    array[offset + 4] = te[4];\n    array[offset + 5] = te[5];\n\n    array[offset + 6] = te[6];\n    array[offset + 7] = te[7];\n    array[offset + 8] = te[8];\n\n    return array;\n\n  },\n\n  getNormalMatrix: function getNormalMatrix(m) {\n\n    // input: THREE.Matrix4\n\n    this.getInverse(m).transpose();\n\n    return this;\n\n  },\n\n  transposeIntoArray: function transposeIntoArray(r) {\n\n    var m = this.elements;\n\n    r[0] = m[0];\n    r[1] = m[3];\n    r[2] = m[6];\n    r[3] = m[1];\n    r[4] = m[4];\n    r[5] = m[7];\n    r[6] = m[2];\n    r[7] = m[5];\n    r[8] = m[8];\n\n    return this;\n\n  },\n\n  fromArray: function fromArray(array) {\n\n    this.elements.set(array);\n\n    return this;\n\n  },\n\n  toArray: function toArray() {\n\n    var te = this.elements;\n\n    return [\n    te[0], te[1], te[2],\n    te[3], te[4], te[5],\n    te[6], te[7], te[8]];\n\n\n  },\n\n  clone: function clone() {\n\n    return new THREE.Matrix3().fromArray(this.elements);\n\n  } };\n\n\n\n// File:src/math/Matrix4.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author supereggbert / http://www.paulbrunt.co.uk/\n * @author philogb / http://blog.thejit.org/\n * @author jordi_ros / http://plattsoft.com\n * @author D1plo1d / http://github.com/D1plo1d\n * @author alteredq / http://alteredqualia.com/\n * @author mikael emtinger / http://gomo.se/\n * @author timknip / http://www.floorplanner.com/\n * @author bhouston / http://exocortex.com\n * @author WestLangley / http://github.com/WestLangley\n */\n\nTHREE.Matrix4 = function () {\n\n  this.elements = new Float32Array([\n\n  1, 0, 0, 0,\n  0, 1, 0, 0,\n  0, 0, 1, 0,\n  0, 0, 0, 1]);\n\n\n\n  if (arguments.length > 0) {\n\n    THREE.error('THREE.Matrix4: the constructor no longer reads arguments. use .set() instead.');\n\n  }\n\n};\n\nTHREE.Matrix4.prototype = {\n\n  constructor: THREE.Matrix4,\n\n  set: function set(n11, n12, n13, n14, n21, n22, n23, n24, n31, n32, n33, n34, n41, n42, n43, n44) {\n\n    var te = this.elements;\n\n    te[0] = n11;te[4] = n12;te[8] = n13;te[12] = n14;\n    te[1] = n21;te[5] = n22;te[9] = n23;te[13] = n24;\n    te[2] = n31;te[6] = n32;te[10] = n33;te[14] = n34;\n    te[3] = n41;te[7] = n42;te[11] = n43;te[15] = n44;\n\n    return this;\n\n  },\n\n  identity: function identity() {\n\n    this.set(\n\n    1, 0, 0, 0,\n    0, 1, 0, 0,\n    0, 0, 1, 0,\n    0, 0, 0, 1);\n\n\n\n    return this;\n\n  },\n\n  copy: function copy(m) {\n\n    this.elements.set(m.elements);\n\n    return this;\n\n  },\n\n  extractPosition: function extractPosition(m) {\n\n    THREE.warn('THREE.Matrix4: .extractPosition() has been renamed to .copyPosition().');\n    return this.copyPosition(m);\n\n  },\n\n  copyPosition: function copyPosition(m) {\n\n    var te = this.elements;\n    var me = m.elements;\n\n    te[12] = me[12];\n    te[13] = me[13];\n    te[14] = me[14];\n\n    return this;\n\n  },\n\n  extractBasis: function extractBasis(xAxis, yAxis, zAxis) {\n\n    var te = this.elements;\n\n    xAxis.set(te[0], te[1], te[2]);\n    yAxis.set(te[4], te[5], te[6]);\n    zAxis.set(te[8], te[9], te[10]);\n\n    return this;\n\n  },\n\n  makeBasis: function makeBasis(xAxis, yAxis, zAxis) {\n\n    this.set(\n    xAxis.x, yAxis.x, zAxis.x, 0,\n    xAxis.y, yAxis.y, zAxis.y, 0,\n    xAxis.z, yAxis.z, zAxis.z, 0,\n    0, 0, 0, 1);\n\n\n    return this;\n\n  },\n\n  extractRotation: function () {\n\n    var v1 = new THREE.Vector3();\n\n    return function (m) {\n\n      var te = this.elements;\n      var me = m.elements;\n\n      var scaleX = 1 / v1.set(me[0], me[1], me[2]).length();\n      var scaleY = 1 / v1.set(me[4], me[5], me[6]).length();\n      var scaleZ = 1 / v1.set(me[8], me[9], me[10]).length();\n\n      te[0] = me[0] * scaleX;\n      te[1] = me[1] * scaleX;\n      te[2] = me[2] * scaleX;\n\n      te[4] = me[4] * scaleY;\n      te[5] = me[5] * scaleY;\n      te[6] = me[6] * scaleY;\n\n      te[8] = me[8] * scaleZ;\n      te[9] = me[9] * scaleZ;\n      te[10] = me[10] * scaleZ;\n\n      return this;\n\n    };\n\n  }(),\n\n  makeRotationFromEuler: function makeRotationFromEuler(euler) {\n\n    if (euler instanceof THREE.Euler === false) {\n\n      THREE.error('THREE.Matrix: .makeRotationFromEuler() now expects a Euler rotation rather than a Vector3 and order.');\n\n    }\n\n    var te = this.elements;\n\n    var x = euler.x,y = euler.y,z = euler.z;\n    var a = Math.cos(x),b = Math.sin(x);\n    var c = Math.cos(y),d = Math.sin(y);\n    var e = Math.cos(z),f = Math.sin(z);\n\n    if (euler.order === 'XYZ') {\n\n      var ae = a * e,af = a * f,be = b * e,bf = b * f;\n\n      te[0] = c * e;\n      te[4] = -c * f;\n      te[8] = d;\n\n      te[1] = af + be * d;\n      te[5] = ae - bf * d;\n      te[9] = -b * c;\n\n      te[2] = bf - ae * d;\n      te[6] = be + af * d;\n      te[10] = a * c;\n\n    } else if (euler.order === 'YXZ') {\n\n      var ce = c * e,cf = c * f,de = d * e,df = d * f;\n\n      te[0] = ce + df * b;\n      te[4] = de * b - cf;\n      te[8] = a * d;\n\n      te[1] = a * f;\n      te[5] = a * e;\n      te[9] = -b;\n\n      te[2] = cf * b - de;\n      te[6] = df + ce * b;\n      te[10] = a * c;\n\n    } else if (euler.order === 'ZXY') {\n\n      var ce = c * e,cf = c * f,de = d * e,df = d * f;\n\n      te[0] = ce - df * b;\n      te[4] = -a * f;\n      te[8] = de + cf * b;\n\n      te[1] = cf + de * b;\n      te[5] = a * e;\n      te[9] = df - ce * b;\n\n      te[2] = -a * d;\n      te[6] = b;\n      te[10] = a * c;\n\n    } else if (euler.order === 'ZYX') {\n\n      var ae = a * e,af = a * f,be = b * e,bf = b * f;\n\n      te[0] = c * e;\n      te[4] = be * d - af;\n      te[8] = ae * d + bf;\n\n      te[1] = c * f;\n      te[5] = bf * d + ae;\n      te[9] = af * d - be;\n\n      te[2] = -d;\n      te[6] = b * c;\n      te[10] = a * c;\n\n    } else if (euler.order === 'YZX') {\n\n      var ac = a * c,ad = a * d,bc = b * c,bd = b * d;\n\n      te[0] = c * e;\n      te[4] = bd - ac * f;\n      te[8] = bc * f + ad;\n\n      te[1] = f;\n      te[5] = a * e;\n      te[9] = -b * e;\n\n      te[2] = -d * e;\n      te[6] = ad * f + bc;\n      te[10] = ac - bd * f;\n\n    } else if (euler.order === 'XZY') {\n\n      var ac = a * c,ad = a * d,bc = b * c,bd = b * d;\n\n      te[0] = c * e;\n      te[4] = -f;\n      te[8] = d * e;\n\n      te[1] = ac * f + bd;\n      te[5] = a * e;\n      te[9] = ad * f - bc;\n\n      te[2] = bc * f - ad;\n      te[6] = b * e;\n      te[10] = bd * f + ac;\n\n    }\n\n    // last column\n    te[3] = 0;\n    te[7] = 0;\n    te[11] = 0;\n\n    // bottom row\n    te[12] = 0;\n    te[13] = 0;\n    te[14] = 0;\n    te[15] = 1;\n\n    return this;\n\n  },\n\n  setRotationFromQuaternion: function setRotationFromQuaternion(q) {\n\n    THREE.warn('THREE.Matrix4: .setRotationFromQuaternion() has been renamed to .makeRotationFromQuaternion().');\n\n    return this.makeRotationFromQuaternion(q);\n\n  },\n\n  makeRotationFromQuaternion: function makeRotationFromQuaternion(q) {\n\n    var te = this.elements;\n\n    var x = q.x,y = q.y,z = q.z,w = q.w;\n    var x2 = x + x,y2 = y + y,z2 = z + z;\n    var xx = x * x2,xy = x * y2,xz = x * z2;\n    var yy = y * y2,yz = y * z2,zz = z * z2;\n    var wx = w * x2,wy = w * y2,wz = w * z2;\n\n    te[0] = 1 - (yy + zz);\n    te[4] = xy - wz;\n    te[8] = xz + wy;\n\n    te[1] = xy + wz;\n    te[5] = 1 - (xx + zz);\n    te[9] = yz - wx;\n\n    te[2] = xz - wy;\n    te[6] = yz + wx;\n    te[10] = 1 - (xx + yy);\n\n    // last column\n    te[3] = 0;\n    te[7] = 0;\n    te[11] = 0;\n\n    // bottom row\n    te[12] = 0;\n    te[13] = 0;\n    te[14] = 0;\n    te[15] = 1;\n\n    return this;\n\n  },\n\n  lookAt: function () {\n\n    var x = new THREE.Vector3();\n    var y = new THREE.Vector3();\n    var z = new THREE.Vector3();\n\n    return function (eye, target, up) {\n\n      var te = this.elements;\n\n      z.subVectors(eye, target).normalize();\n\n      if (z.length() === 0) {\n\n        z.z = 1;\n\n      }\n\n      x.crossVectors(up, z).normalize();\n\n      if (x.length() === 0) {\n\n        z.x += 0.0001;\n        x.crossVectors(up, z).normalize();\n\n      }\n\n      y.crossVectors(z, x);\n\n\n      te[0] = x.x;te[4] = y.x;te[8] = z.x;\n      te[1] = x.y;te[5] = y.y;te[9] = z.y;\n      te[2] = x.z;te[6] = y.z;te[10] = z.z;\n\n      return this;\n\n    };\n\n  }(),\n\n  multiply: function multiply(m, n) {\n\n    if (n !== undefined) {\n\n      THREE.warn('THREE.Matrix4: .multiply() now only accepts one argument. Use .multiplyMatrices( a, b ) instead.');\n      return this.multiplyMatrices(m, n);\n\n    }\n\n    return this.multiplyMatrices(this, m);\n\n  },\n\n  multiplyMatrices: function multiplyMatrices(a, b) {\n\n    var ae = a.elements;\n    var be = b.elements;\n    var te = this.elements;\n\n    var a11 = ae[0],a12 = ae[4],a13 = ae[8],a14 = ae[12];\n    var a21 = ae[1],a22 = ae[5],a23 = ae[9],a24 = ae[13];\n    var a31 = ae[2],a32 = ae[6],a33 = ae[10],a34 = ae[14];\n    var a41 = ae[3],a42 = ae[7],a43 = ae[11],a44 = ae[15];\n\n    var b11 = be[0],b12 = be[4],b13 = be[8],b14 = be[12];\n    var b21 = be[1],b22 = be[5],b23 = be[9],b24 = be[13];\n    var b31 = be[2],b32 = be[6],b33 = be[10],b34 = be[14];\n    var b41 = be[3],b42 = be[7],b43 = be[11],b44 = be[15];\n\n    te[0] = a11 * b11 + a12 * b21 + a13 * b31 + a14 * b41;\n    te[4] = a11 * b12 + a12 * b22 + a13 * b32 + a14 * b42;\n    te[8] = a11 * b13 + a12 * b23 + a13 * b33 + a14 * b43;\n    te[12] = a11 * b14 + a12 * b24 + a13 * b34 + a14 * b44;\n\n    te[1] = a21 * b11 + a22 * b21 + a23 * b31 + a24 * b41;\n    te[5] = a21 * b12 + a22 * b22 + a23 * b32 + a24 * b42;\n    te[9] = a21 * b13 + a22 * b23 + a23 * b33 + a24 * b43;\n    te[13] = a21 * b14 + a22 * b24 + a23 * b34 + a24 * b44;\n\n    te[2] = a31 * b11 + a32 * b21 + a33 * b31 + a34 * b41;\n    te[6] = a31 * b12 + a32 * b22 + a33 * b32 + a34 * b42;\n    te[10] = a31 * b13 + a32 * b23 + a33 * b33 + a34 * b43;\n    te[14] = a31 * b14 + a32 * b24 + a33 * b34 + a34 * b44;\n\n    te[3] = a41 * b11 + a42 * b21 + a43 * b31 + a44 * b41;\n    te[7] = a41 * b12 + a42 * b22 + a43 * b32 + a44 * b42;\n    te[11] = a41 * b13 + a42 * b23 + a43 * b33 + a44 * b43;\n    te[15] = a41 * b14 + a42 * b24 + a43 * b34 + a44 * b44;\n\n    return this;\n\n  },\n\n  multiplyToArray: function multiplyToArray(a, b, r) {\n\n    var te = this.elements;\n\n    this.multiplyMatrices(a, b);\n\n    r[0] = te[0];r[1] = te[1];r[2] = te[2];r[3] = te[3];\n    r[4] = te[4];r[5] = te[5];r[6] = te[6];r[7] = te[7];\n    r[8] = te[8];r[9] = te[9];r[10] = te[10];r[11] = te[11];\n    r[12] = te[12];r[13] = te[13];r[14] = te[14];r[15] = te[15];\n\n    return this;\n\n  },\n\n  multiplyScalar: function multiplyScalar(s) {\n\n    var te = this.elements;\n\n    te[0] *= s;te[4] *= s;te[8] *= s;te[12] *= s;\n    te[1] *= s;te[5] *= s;te[9] *= s;te[13] *= s;\n    te[2] *= s;te[6] *= s;te[10] *= s;te[14] *= s;\n    te[3] *= s;te[7] *= s;te[11] *= s;te[15] *= s;\n\n    return this;\n\n  },\n\n  multiplyVector3: function multiplyVector3(vector) {\n\n    THREE.warn('THREE.Matrix4: .multiplyVector3() has been removed. Use vector.applyMatrix4( matrix ) or vector.applyProjection( matrix ) instead.');\n    return vector.applyProjection(this);\n\n  },\n\n  multiplyVector4: function multiplyVector4(vector) {\n\n    THREE.warn('THREE.Matrix4: .multiplyVector4() has been removed. Use vector.applyMatrix4( matrix ) instead.');\n    return vector.applyMatrix4(this);\n\n  },\n\n  multiplyVector3Array: function multiplyVector3Array(a) {\n\n    THREE.warn('THREE.Matrix4: .multiplyVector3Array() has been renamed. Use matrix.applyToVector3Array( array ) instead.');\n    return this.applyToVector3Array(a);\n\n  },\n\n  applyToVector3Array: function () {\n\n    var v1 = new THREE.Vector3();\n\n    return function (array, offset, length) {\n\n      if (offset === undefined) offset = 0;\n      if (length === undefined) length = array.length;\n\n      for (var i = 0, j = offset; i < length; i += 3, j += 3) {\n\n        v1.x = array[j];\n        v1.y = array[j + 1];\n        v1.z = array[j + 2];\n\n        v1.applyMatrix4(this);\n\n        array[j] = v1.x;\n        array[j + 1] = v1.y;\n        array[j + 2] = v1.z;\n\n      }\n\n      return array;\n\n    };\n\n  }(),\n\n  rotateAxis: function rotateAxis(v) {\n\n    THREE.warn('THREE.Matrix4: .rotateAxis() has been removed. Use Vector3.transformDirection( matrix ) instead.');\n\n    v.transformDirection(this);\n\n  },\n\n  crossVector: function crossVector(vector) {\n\n    THREE.warn('THREE.Matrix4: .crossVector() has been removed. Use vector.applyMatrix4( matrix ) instead.');\n    return vector.applyMatrix4(this);\n\n  },\n\n  determinant: function determinant() {\n\n    var te = this.elements;\n\n    var n11 = te[0],n12 = te[4],n13 = te[8],n14 = te[12];\n    var n21 = te[1],n22 = te[5],n23 = te[9],n24 = te[13];\n    var n31 = te[2],n32 = te[6],n33 = te[10],n34 = te[14];\n    var n41 = te[3],n42 = te[7],n43 = te[11],n44 = te[15];\n\n    //TODO: make this more efficient\n    //( based on http://www.euclideanspace.com/maths/algebra/matrix/functions/inverse/fourD/index.htm )\n\n    return (\n      n41 * (\n      +n14 * n23 * n32 -\n      n13 * n24 * n32 -\n      n14 * n22 * n33 +\n      n12 * n24 * n33 +\n      n13 * n22 * n34 -\n      n12 * n23 * n34) +\n\n      n42 * (\n      +n11 * n23 * n34 -\n      n11 * n24 * n33 +\n      n14 * n21 * n33 -\n      n13 * n21 * n34 +\n      n13 * n24 * n31 -\n      n14 * n23 * n31) +\n\n      n43 * (\n      +n11 * n24 * n32 -\n      n11 * n22 * n34 -\n      n14 * n21 * n32 +\n      n12 * n21 * n34 +\n      n14 * n22 * n31 -\n      n12 * n24 * n31) +\n\n      n44 * (\n      -n13 * n22 * n31 -\n      n11 * n23 * n32 +\n      n11 * n22 * n33 +\n      n13 * n21 * n32 -\n      n12 * n21 * n33 +\n      n12 * n23 * n31));\n\n\n\n\n  },\n\n  transpose: function transpose() {\n\n    var te = this.elements;\n    var tmp;\n\n    tmp = te[1];te[1] = te[4];te[4] = tmp;\n    tmp = te[2];te[2] = te[8];te[8] = tmp;\n    tmp = te[6];te[6] = te[9];te[9] = tmp;\n\n    tmp = te[3];te[3] = te[12];te[12] = tmp;\n    tmp = te[7];te[7] = te[13];te[13] = tmp;\n    tmp = te[11];te[11] = te[14];te[14] = tmp;\n\n    return this;\n\n  },\n\n  flattenToArrayOffset: function flattenToArrayOffset(array, offset) {\n\n    var te = this.elements;\n\n    array[offset] = te[0];\n    array[offset + 1] = te[1];\n    array[offset + 2] = te[2];\n    array[offset + 3] = te[3];\n\n    array[offset + 4] = te[4];\n    array[offset + 5] = te[5];\n    array[offset + 6] = te[6];\n    array[offset + 7] = te[7];\n\n    array[offset + 8] = te[8];\n    array[offset + 9] = te[9];\n    array[offset + 10] = te[10];\n    array[offset + 11] = te[11];\n\n    array[offset + 12] = te[12];\n    array[offset + 13] = te[13];\n    array[offset + 14] = te[14];\n    array[offset + 15] = te[15];\n\n    return array;\n\n  },\n\n  getPosition: function () {\n\n    var v1 = new THREE.Vector3();\n\n    return function () {\n\n      THREE.warn('THREE.Matrix4: .getPosition() has been removed. Use Vector3.setFromMatrixPosition( matrix ) instead.');\n\n      var te = this.elements;\n      return v1.set(te[12], te[13], te[14]);\n\n    };\n\n  }(),\n\n  setPosition: function setPosition(v) {\n\n    var te = this.elements;\n\n    te[12] = v.x;\n    te[13] = v.y;\n    te[14] = v.z;\n\n    return this;\n\n  },\n\n  getInverse: function getInverse(m, throwOnInvertible) {\n\n    // based on http://www.euclideanspace.com/maths/algebra/matrix/functions/inverse/fourD/index.htm\n    var te = this.elements;\n    var me = m.elements;\n\n    var n11 = me[0],n12 = me[4],n13 = me[8],n14 = me[12];\n    var n21 = me[1],n22 = me[5],n23 = me[9],n24 = me[13];\n    var n31 = me[2],n32 = me[6],n33 = me[10],n34 = me[14];\n    var n41 = me[3],n42 = me[7],n43 = me[11],n44 = me[15];\n\n    te[0] = n23 * n34 * n42 - n24 * n33 * n42 + n24 * n32 * n43 - n22 * n34 * n43 - n23 * n32 * n44 + n22 * n33 * n44;\n    te[4] = n14 * n33 * n42 - n13 * n34 * n42 - n14 * n32 * n43 + n12 * n34 * n43 + n13 * n32 * n44 - n12 * n33 * n44;\n    te[8] = n13 * n24 * n42 - n14 * n23 * n42 + n14 * n22 * n43 - n12 * n24 * n43 - n13 * n22 * n44 + n12 * n23 * n44;\n    te[12] = n14 * n23 * n32 - n13 * n24 * n32 - n14 * n22 * n33 + n12 * n24 * n33 + n13 * n22 * n34 - n12 * n23 * n34;\n    te[1] = n24 * n33 * n41 - n23 * n34 * n41 - n24 * n31 * n43 + n21 * n34 * n43 + n23 * n31 * n44 - n21 * n33 * n44;\n    te[5] = n13 * n34 * n41 - n14 * n33 * n41 + n14 * n31 * n43 - n11 * n34 * n43 - n13 * n31 * n44 + n11 * n33 * n44;\n    te[9] = n14 * n23 * n41 - n13 * n24 * n41 - n14 * n21 * n43 + n11 * n24 * n43 + n13 * n21 * n44 - n11 * n23 * n44;\n    te[13] = n13 * n24 * n31 - n14 * n23 * n31 + n14 * n21 * n33 - n11 * n24 * n33 - n13 * n21 * n34 + n11 * n23 * n34;\n    te[2] = n22 * n34 * n41 - n24 * n32 * n41 + n24 * n31 * n42 - n21 * n34 * n42 - n22 * n31 * n44 + n21 * n32 * n44;\n    te[6] = n14 * n32 * n41 - n12 * n34 * n41 - n14 * n31 * n42 + n11 * n34 * n42 + n12 * n31 * n44 - n11 * n32 * n44;\n    te[10] = n12 * n24 * n41 - n14 * n22 * n41 + n14 * n21 * n42 - n11 * n24 * n42 - n12 * n21 * n44 + n11 * n22 * n44;\n    te[14] = n14 * n22 * n31 - n12 * n24 * n31 - n14 * n21 * n32 + n11 * n24 * n32 + n12 * n21 * n34 - n11 * n22 * n34;\n    te[3] = n23 * n32 * n41 - n22 * n33 * n41 - n23 * n31 * n42 + n21 * n33 * n42 + n22 * n31 * n43 - n21 * n32 * n43;\n    te[7] = n12 * n33 * n41 - n13 * n32 * n41 + n13 * n31 * n42 - n11 * n33 * n42 - n12 * n31 * n43 + n11 * n32 * n43;\n    te[11] = n13 * n22 * n41 - n12 * n23 * n41 - n13 * n21 * n42 + n11 * n23 * n42 + n12 * n21 * n43 - n11 * n22 * n43;\n    te[15] = n12 * n23 * n31 - n13 * n22 * n31 + n13 * n21 * n32 - n11 * n23 * n32 - n12 * n21 * n33 + n11 * n22 * n33;\n\n    var det = n11 * te[0] + n21 * te[4] + n31 * te[8] + n41 * te[12];\n\n    if (det == 0) {\n\n      var msg = \"THREE.Matrix4.getInverse(): can't invert matrix, determinant is 0\";\n\n      if (throwOnInvertible || false) {\n\n        throw new Error(msg);\n\n      } else {\n\n        THREE.warn(msg);\n\n      }\n\n      this.identity();\n\n      return this;\n    }\n\n    this.multiplyScalar(1 / det);\n\n    return this;\n\n  },\n\n  translate: function translate(v) {\n\n    THREE.error('THREE.Matrix4: .translate() has been removed.');\n\n  },\n\n  rotateX: function rotateX(angle) {\n\n    THREE.error('THREE.Matrix4: .rotateX() has been removed.');\n\n  },\n\n  rotateY: function rotateY(angle) {\n\n    THREE.error('THREE.Matrix4: .rotateY() has been removed.');\n\n  },\n\n  rotateZ: function rotateZ(angle) {\n\n    THREE.error('THREE.Matrix4: .rotateZ() has been removed.');\n\n  },\n\n  rotateByAxis: function rotateByAxis(axis, angle) {\n\n    THREE.error('THREE.Matrix4: .rotateByAxis() has been removed.');\n\n  },\n\n  scale: function scale(v) {\n\n    var te = this.elements;\n    var x = v.x,y = v.y,z = v.z;\n\n    te[0] *= x;te[4] *= y;te[8] *= z;\n    te[1] *= x;te[5] *= y;te[9] *= z;\n    te[2] *= x;te[6] *= y;te[10] *= z;\n    te[3] *= x;te[7] *= y;te[11] *= z;\n\n    return this;\n\n  },\n\n  getMaxScaleOnAxis: function getMaxScaleOnAxis() {\n\n    var te = this.elements;\n\n    var scaleXSq = te[0] * te[0] + te[1] * te[1] + te[2] * te[2];\n    var scaleYSq = te[4] * te[4] + te[5] * te[5] + te[6] * te[6];\n    var scaleZSq = te[8] * te[8] + te[9] * te[9] + te[10] * te[10];\n\n    return Math.sqrt(Math.max(scaleXSq, Math.max(scaleYSq, scaleZSq)));\n\n  },\n\n  makeTranslation: function makeTranslation(x, y, z) {\n\n    this.set(\n\n    1, 0, 0, x,\n    0, 1, 0, y,\n    0, 0, 1, z,\n    0, 0, 0, 1);\n\n\n\n    return this;\n\n  },\n\n  makeRotationX: function makeRotationX(theta) {\n\n    var c = Math.cos(theta),s = Math.sin(theta);\n\n    this.set(\n\n    1, 0, 0, 0,\n    0, c, -s, 0,\n    0, s, c, 0,\n    0, 0, 0, 1);\n\n\n\n    return this;\n\n  },\n\n  makeRotationY: function makeRotationY(theta) {\n\n    var c = Math.cos(theta),s = Math.sin(theta);\n\n    this.set(\n\n    c, 0, s, 0,\n    0, 1, 0, 0,\n    -s, 0, c, 0,\n    0, 0, 0, 1);\n\n\n\n    return this;\n\n  },\n\n  makeRotationZ: function makeRotationZ(theta) {\n\n    var c = Math.cos(theta),s = Math.sin(theta);\n\n    this.set(\n\n    c, -s, 0, 0,\n    s, c, 0, 0,\n    0, 0, 1, 0,\n    0, 0, 0, 1);\n\n\n\n    return this;\n\n  },\n\n  makeRotationAxis: function makeRotationAxis(axis, angle) {\n\n    // Based on http://www.gamedev.net/reference/articles/article1199.asp\n\n    var c = Math.cos(angle);\n    var s = Math.sin(angle);\n    var t = 1 - c;\n    var x = axis.x,y = axis.y,z = axis.z;\n    var tx = t * x,ty = t * y;\n\n    this.set(\n\n    tx * x + c, tx * y - s * z, tx * z + s * y, 0,\n    tx * y + s * z, ty * y + c, ty * z - s * x, 0,\n    tx * z - s * y, ty * z + s * x, t * z * z + c, 0,\n    0, 0, 0, 1);\n\n\n\n    return this;\n\n  },\n\n  makeScale: function makeScale(x, y, z) {\n\n    this.set(\n\n    x, 0, 0, 0,\n    0, y, 0, 0,\n    0, 0, z, 0,\n    0, 0, 0, 1);\n\n\n\n    return this;\n\n  },\n\n  compose: function compose(position, quaternion, scale) {\n\n    this.makeRotationFromQuaternion(quaternion);\n    this.scale(scale);\n    this.setPosition(position);\n\n    return this;\n\n  },\n\n  decompose: function () {\n\n    var vector = new THREE.Vector3();\n    var matrix = new THREE.Matrix4();\n\n    return function (position, quaternion, scale) {\n\n      var te = this.elements;\n\n      var sx = vector.set(te[0], te[1], te[2]).length();\n      var sy = vector.set(te[4], te[5], te[6]).length();\n      var sz = vector.set(te[8], te[9], te[10]).length();\n\n      // if determine is negative, we need to invert one scale\n      var det = this.determinant();\n      if (det < 0) {\n        sx = -sx;\n      }\n\n      position.x = te[12];\n      position.y = te[13];\n      position.z = te[14];\n\n      // scale the rotation part\n\n      matrix.elements.set(this.elements); // at this point matrix is incomplete so we can't use .copy()\n\n      var invSX = 1 / sx;\n      var invSY = 1 / sy;\n      var invSZ = 1 / sz;\n\n      matrix.elements[0] *= invSX;\n      matrix.elements[1] *= invSX;\n      matrix.elements[2] *= invSX;\n\n      matrix.elements[4] *= invSY;\n      matrix.elements[5] *= invSY;\n      matrix.elements[6] *= invSY;\n\n      matrix.elements[8] *= invSZ;\n      matrix.elements[9] *= invSZ;\n      matrix.elements[10] *= invSZ;\n\n      quaternion.setFromRotationMatrix(matrix);\n\n      scale.x = sx;\n      scale.y = sy;\n      scale.z = sz;\n\n      return this;\n\n    };\n\n  }(),\n\n  makeFrustum: function makeFrustum(left, right, bottom, top, near, far) {\n\n    var te = this.elements;\n    var x = 2 * near / (right - left);\n    var y = 2 * near / (top - bottom);\n\n    var a = (right + left) / (right - left);\n    var b = (top + bottom) / (top - bottom);\n    var c = -(far + near) / (far - near);\n    var d = -2 * far * near / (far - near);\n\n    te[0] = x;te[4] = 0;te[8] = a;te[12] = 0;\n    te[1] = 0;te[5] = y;te[9] = b;te[13] = 0;\n    te[2] = 0;te[6] = 0;te[10] = c;te[14] = d;\n    te[3] = 0;te[7] = 0;te[11] = -1;te[15] = 0;\n\n    return this;\n\n  },\n\n  makePerspective: function makePerspective(fov, aspect, near, far) {\n\n    var ymax = near * Math.tan(THREE.Math.degToRad(fov * 0.5));\n    var ymin = -ymax;\n    var xmin = ymin * aspect;\n    var xmax = ymax * aspect;\n\n    return this.makeFrustum(xmin, xmax, ymin, ymax, near, far);\n\n  },\n\n  makeOrthographic: function makeOrthographic(left, right, top, bottom, near, far) {\n\n    var te = this.elements;\n    var w = right - left;\n    var h = top - bottom;\n    var p = far - near;\n\n    var x = (right + left) / w;\n    var y = (top + bottom) / h;\n    var z = (far + near) / p;\n\n    te[0] = 2 / w;te[4] = 0;te[8] = 0;te[12] = -x;\n    te[1] = 0;te[5] = 2 / h;te[9] = 0;te[13] = -y;\n    te[2] = 0;te[6] = 0;te[10] = -2 / p;te[14] = -z;\n    te[3] = 0;te[7] = 0;te[11] = 0;te[15] = 1;\n\n    return this;\n\n  },\n\n  equals: function equals(matrix) {\n\n    var te = this.elements;\n    var me = matrix.elements;\n\n    for (var i = 0; i < 16; i++) {\n\n      if (te[i] !== me[i]) return false;\n\n    }\n\n    return true;\n\n  },\n\n  fromArray: function fromArray(array) {\n\n    this.elements.set(array);\n\n    return this;\n\n  },\n\n  toArray: function toArray() {\n\n    var te = this.elements;\n\n    return [\n    te[0], te[1], te[2], te[3],\n    te[4], te[5], te[6], te[7],\n    te[8], te[9], te[10], te[11],\n    te[12], te[13], te[14], te[15]];\n\n\n  },\n\n  clone: function clone() {\n\n    return new THREE.Matrix4().fromArray(this.elements);\n\n  } };\n\n\n\n// File:src/math/Ray.js\n\n/**\n * @author bhouston / http://exocortex.com\n */\n\nTHREE.Ray = function (origin, direction) {\n\n  this.origin = origin !== undefined ? origin : new THREE.Vector3();\n  this.direction = direction !== undefined ? direction : new THREE.Vector3();\n\n};\n\nTHREE.Ray.prototype = {\n\n  constructor: THREE.Ray,\n\n  set: function set(origin, direction) {\n\n    this.origin.copy(origin);\n    this.direction.copy(direction);\n\n    return this;\n\n  },\n\n  copy: function copy(ray) {\n\n    this.origin.copy(ray.origin);\n    this.direction.copy(ray.direction);\n\n    return this;\n\n  },\n\n  at: function at(t, optionalTarget) {\n\n    var result = optionalTarget || new THREE.Vector3();\n\n    return result.copy(this.direction).multiplyScalar(t).add(this.origin);\n\n  },\n\n  recast: function () {\n\n    var v1 = new THREE.Vector3();\n\n    return function (t) {\n\n      this.origin.copy(this.at(t, v1));\n\n      return this;\n\n    };\n\n  }(),\n\n  closestPointToPoint: function closestPointToPoint(point, optionalTarget) {\n\n    var result = optionalTarget || new THREE.Vector3();\n    result.subVectors(point, this.origin);\n    var directionDistance = result.dot(this.direction);\n\n    if (directionDistance < 0) {\n\n      return result.copy(this.origin);\n\n    }\n\n    return result.copy(this.direction).multiplyScalar(directionDistance).add(this.origin);\n\n  },\n\n  distanceToPoint: function () {\n\n    var v1 = new THREE.Vector3();\n\n    return function (point) {\n\n      var directionDistance = v1.subVectors(point, this.origin).dot(this.direction);\n\n      // point behind the ray\n\n      if (directionDistance < 0) {\n\n        return this.origin.distanceTo(point);\n\n      }\n\n      v1.copy(this.direction).multiplyScalar(directionDistance).add(this.origin);\n\n      return v1.distanceTo(point);\n\n    };\n\n  }(),\n\n  distanceSqToSegment: function () {\n\n    var segCenter = new THREE.Vector3();\n    var segDir = new THREE.Vector3();\n    var diff = new THREE.Vector3();\n\n    return function (v0, v1, optionalPointOnRay, optionalPointOnSegment) {\n\n      // from http://www.geometrictools.com/LibMathematics/Distance/Wm5DistRay3Segment3.cpp\n      // It returns the min distance between the ray and the segment\n      // defined by v0 and v1\n      // It can also set two optional targets :\n      // - The closest point on the ray\n      // - The closest point on the segment\n\n      segCenter.copy(v0).add(v1).multiplyScalar(0.5);\n      segDir.copy(v1).sub(v0).normalize();\n      diff.copy(this.origin).sub(segCenter);\n\n      var segExtent = v0.distanceTo(v1) * 0.5;\n      var a01 = -this.direction.dot(segDir);\n      var b0 = diff.dot(this.direction);\n      var b1 = -diff.dot(segDir);\n      var c = diff.lengthSq();\n      var det = Math.abs(1 - a01 * a01);\n      var s0, s1, sqrDist, extDet;\n\n      if (det > 0) {\n\n        // The ray and segment are not parallel.\n\n        s0 = a01 * b1 - b0;\n        s1 = a01 * b0 - b1;\n        extDet = segExtent * det;\n\n        if (s0 >= 0) {\n\n          if (s1 >= -extDet) {\n\n            if (s1 <= extDet) {\n\n              // region 0\n              // Minimum at interior points of ray and segment.\n\n              var invDet = 1 / det;\n              s0 *= invDet;\n              s1 *= invDet;\n              sqrDist = s0 * (s0 + a01 * s1 + 2 * b0) + s1 * (a01 * s0 + s1 + 2 * b1) + c;\n\n            } else {\n\n              // region 1\n\n              s1 = segExtent;\n              s0 = Math.max(0, -(a01 * s1 + b0));\n              sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;\n\n            }\n\n          } else {\n\n            // region 5\n\n            s1 = -segExtent;\n            s0 = Math.max(0, -(a01 * s1 + b0));\n            sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;\n\n          }\n\n        } else {\n\n          if (s1 <= -extDet) {\n\n            // region 4\n\n            s0 = Math.max(0, -(-a01 * segExtent + b0));\n            s1 = s0 > 0 ? -segExtent : Math.min(Math.max(-segExtent, -b1), segExtent);\n            sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;\n\n          } else if (s1 <= extDet) {\n\n            // region 3\n\n            s0 = 0;\n            s1 = Math.min(Math.max(-segExtent, -b1), segExtent);\n            sqrDist = s1 * (s1 + 2 * b1) + c;\n\n          } else {\n\n            // region 2\n\n            s0 = Math.max(0, -(a01 * segExtent + b0));\n            s1 = s0 > 0 ? segExtent : Math.min(Math.max(-segExtent, -b1), segExtent);\n            sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;\n\n          }\n\n        }\n\n      } else {\n\n        // Ray and segment are parallel.\n\n        s1 = a01 > 0 ? -segExtent : segExtent;\n        s0 = Math.max(0, -(a01 * s1 + b0));\n        sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;\n\n      }\n\n      if (optionalPointOnRay) {\n\n        optionalPointOnRay.copy(this.direction).multiplyScalar(s0).add(this.origin);\n\n      }\n\n      if (optionalPointOnSegment) {\n\n        optionalPointOnSegment.copy(segDir).multiplyScalar(s1).add(segCenter);\n\n      }\n\n      return sqrDist;\n\n    };\n\n  }(),\n\n\n  isIntersectionSphere: function isIntersectionSphere(sphere) {\n\n    return this.distanceToPoint(sphere.center) <= sphere.radius;\n\n  },\n\n  intersectSphere: function () {\n\n    // from http://www.scratchapixel.com/lessons/3d-basic-lessons/lesson-7-intersecting-simple-shapes/ray-sphere-intersection/\n\n    var v1 = new THREE.Vector3();\n\n    return function (sphere, optionalTarget) {\n\n      v1.subVectors(sphere.center, this.origin);\n\n      var tca = v1.dot(this.direction);\n\n      var d2 = v1.dot(v1) - tca * tca;\n\n      var radius2 = sphere.radius * sphere.radius;\n\n      if (d2 > radius2) return null;\n\n      var thc = Math.sqrt(radius2 - d2);\n\n      // t0 = first intersect point - entrance on front of sphere\n      var t0 = tca - thc;\n\n      // t1 = second intersect point - exit point on back of sphere\n      var t1 = tca + thc;\n\n      // test to see if both t0 and t1 are behind the ray - if so, return null\n      if (t0 < 0 && t1 < 0) return null;\n\n      // test to see if t0 is behind the ray:\n      // if it is, the ray is inside the sphere, so return the second exit point scaled by t1,\n      // in order to always return an intersect point that is in front of the ray.\n      if (t0 < 0) return this.at(t1, optionalTarget);\n\n      // else t0 is in front of the ray, so return the first collision point scaled by t0 \n      return this.at(t0, optionalTarget);\n\n    };\n\n  }(),\n\n  isIntersectionPlane: function isIntersectionPlane(plane) {\n\n    // check if the ray lies on the plane first\n\n    var distToPoint = plane.distanceToPoint(this.origin);\n\n    if (distToPoint === 0) {\n\n      return true;\n\n    }\n\n    var denominator = plane.normal.dot(this.direction);\n\n    if (denominator * distToPoint < 0) {\n\n      return true;\n\n    }\n\n    // ray origin is behind the plane (and is pointing behind it)\n\n    return false;\n\n  },\n\n  distanceToPlane: function distanceToPlane(plane) {\n\n    var denominator = plane.normal.dot(this.direction);\n    if (denominator == 0) {\n\n      // line is coplanar, return origin\n      if (plane.distanceToPoint(this.origin) == 0) {\n\n        return 0;\n\n      }\n\n      // Null is preferable to undefined since undefined means.... it is undefined\n\n      return null;\n\n    }\n\n    var t = -(this.origin.dot(plane.normal) + plane.constant) / denominator;\n\n    // Return if the ray never intersects the plane\n\n    return t >= 0 ? t : null;\n\n  },\n\n  intersectPlane: function intersectPlane(plane, optionalTarget) {\n\n    var t = this.distanceToPlane(plane);\n\n    if (t === null) {\n\n      return null;\n    }\n\n    return this.at(t, optionalTarget);\n\n  },\n\n  isIntersectionBox: function () {\n\n    var v = new THREE.Vector3();\n\n    return function (box) {\n\n      return this.intersectBox(box, v) !== null;\n\n    };\n\n  }(),\n\n  intersectBox: function intersectBox(box, optionalTarget) {\n\n    // http://www.scratchapixel.com/lessons/3d-basic-lessons/lesson-7-intersecting-simple-shapes/ray-box-intersection/\n\n    var tmin, tmax, tymin, tymax, tzmin, tzmax;\n\n    var invdirx = 1 / this.direction.x,\n    invdiry = 1 / this.direction.y,\n    invdirz = 1 / this.direction.z;\n\n    var origin = this.origin;\n\n    if (invdirx >= 0) {\n\n      tmin = (box.min.x - origin.x) * invdirx;\n      tmax = (box.max.x - origin.x) * invdirx;\n\n    } else {\n\n      tmin = (box.max.x - origin.x) * invdirx;\n      tmax = (box.min.x - origin.x) * invdirx;\n    }\n\n    if (invdiry >= 0) {\n\n      tymin = (box.min.y - origin.y) * invdiry;\n      tymax = (box.max.y - origin.y) * invdiry;\n\n    } else {\n\n      tymin = (box.max.y - origin.y) * invdiry;\n      tymax = (box.min.y - origin.y) * invdiry;\n    }\n\n    if (tmin > tymax || tymin > tmax) return null;\n\n    // These lines also handle the case where tmin or tmax is NaN\n    // (result of 0 * Infinity). x !== x returns true if x is NaN\n\n    if (tymin > tmin || tmin !== tmin) tmin = tymin;\n\n    if (tymax < tmax || tmax !== tmax) tmax = tymax;\n\n    if (invdirz >= 0) {\n\n      tzmin = (box.min.z - origin.z) * invdirz;\n      tzmax = (box.max.z - origin.z) * invdirz;\n\n    } else {\n\n      tzmin = (box.max.z - origin.z) * invdirz;\n      tzmax = (box.min.z - origin.z) * invdirz;\n    }\n\n    if (tmin > tzmax || tzmin > tmax) return null;\n\n    if (tzmin > tmin || tmin !== tmin) tmin = tzmin;\n\n    if (tzmax < tmax || tmax !== tmax) tmax = tzmax;\n\n    //return point closest to the ray (positive side)\n\n    if (tmax < 0) return null;\n\n    return this.at(tmin >= 0 ? tmin : tmax, optionalTarget);\n\n  },\n\n  intersectTriangle: function () {\n\n    // Compute the offset origin, edges, and normal.\n    var diff = new THREE.Vector3();\n    var edge1 = new THREE.Vector3();\n    var edge2 = new THREE.Vector3();\n    var normal = new THREE.Vector3();\n\n    return function (a, b, c, backfaceCulling, optionalTarget) {\n\n      // from http://www.geometrictools.com/LibMathematics/Intersection/Wm5IntrRay3Triangle3.cpp\n\n      edge1.subVectors(b, a);\n      edge2.subVectors(c, a);\n      normal.crossVectors(edge1, edge2);\n\n      // Solve Q + t*D = b1*E1 + b2*E2 (Q = kDiff, D = ray direction,\n      // E1 = kEdge1, E2 = kEdge2, N = Cross(E1,E2)) by\n      //   |Dot(D,N)|*b1 = sign(Dot(D,N))*Dot(D,Cross(Q,E2))\n      //   |Dot(D,N)|*b2 = sign(Dot(D,N))*Dot(D,Cross(E1,Q))\n      //   |Dot(D,N)|*t = -sign(Dot(D,N))*Dot(Q,N)\n      var DdN = this.direction.dot(normal);\n      var sign;\n\n      if (DdN > 0) {\n\n        if (backfaceCulling) return null;\n        sign = 1;\n\n      } else if (DdN < 0) {\n\n        sign = -1;\n        DdN = -DdN;\n\n      } else {\n\n        return null;\n\n      }\n\n      diff.subVectors(this.origin, a);\n      var DdQxE2 = sign * this.direction.dot(edge2.crossVectors(diff, edge2));\n\n      // b1 < 0, no intersection\n      if (DdQxE2 < 0) {\n\n        return null;\n\n      }\n\n      var DdE1xQ = sign * this.direction.dot(edge1.cross(diff));\n\n      // b2 < 0, no intersection\n      if (DdE1xQ < 0) {\n\n        return null;\n\n      }\n\n      // b1+b2 > 1, no intersection\n      if (DdQxE2 + DdE1xQ > DdN) {\n\n        return null;\n\n      }\n\n      // Line intersects triangle, check if ray does.\n      var QdN = -sign * diff.dot(normal);\n\n      // t < 0, no intersection\n      if (QdN < 0) {\n\n        return null;\n\n      }\n\n      // Ray intersects triangle.\n      return this.at(QdN / DdN, optionalTarget);\n\n    };\n\n  }(),\n\n  applyMatrix4: function applyMatrix4(matrix4) {\n\n    this.direction.add(this.origin).applyMatrix4(matrix4);\n    this.origin.applyMatrix4(matrix4);\n    this.direction.sub(this.origin);\n    this.direction.normalize();\n\n    return this;\n  },\n\n  equals: function equals(ray) {\n\n    return ray.origin.equals(this.origin) && ray.direction.equals(this.direction);\n\n  },\n\n  clone: function clone() {\n\n    return new THREE.Ray().copy(this);\n\n  } };\n\n\n\n// File:src/math/Sphere.js\n\n/**\n * @author bhouston / http://exocortex.com\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.Sphere = function (center, radius) {\n\n  this.center = center !== undefined ? center : new THREE.Vector3();\n  this.radius = radius !== undefined ? radius : 0;\n\n};\n\nTHREE.Sphere.prototype = {\n\n  constructor: THREE.Sphere,\n\n  set: function set(center, radius) {\n\n    this.center.copy(center);\n    this.radius = radius;\n\n    return this;\n  },\n\n  setFromPoints: function () {\n\n    var box = new THREE.Box3();\n\n    return function (points, optionalCenter) {\n\n      var center = this.center;\n\n      if (optionalCenter !== undefined) {\n\n        center.copy(optionalCenter);\n\n      } else {\n\n        box.setFromPoints(points).center(center);\n\n      }\n\n      var maxRadiusSq = 0;\n\n      for (var i = 0, il = points.length; i < il; i++) {\n\n        maxRadiusSq = Math.max(maxRadiusSq, center.distanceToSquared(points[i]));\n\n      }\n\n      this.radius = Math.sqrt(maxRadiusSq);\n\n      return this;\n\n    };\n\n  }(),\n\n  copy: function copy(sphere) {\n\n    this.center.copy(sphere.center);\n    this.radius = sphere.radius;\n\n    return this;\n\n  },\n\n  empty: function empty() {\n\n    return this.radius <= 0;\n\n  },\n\n  containsPoint: function containsPoint(point) {\n\n    return point.distanceToSquared(this.center) <= this.radius * this.radius;\n\n  },\n\n  distanceToPoint: function distanceToPoint(point) {\n\n    return point.distanceTo(this.center) - this.radius;\n\n  },\n\n  intersectsSphere: function intersectsSphere(sphere) {\n\n    var radiusSum = this.radius + sphere.radius;\n\n    return sphere.center.distanceToSquared(this.center) <= radiusSum * radiusSum;\n\n  },\n\n  clampPoint: function clampPoint(point, optionalTarget) {\n\n    var deltaLengthSq = this.center.distanceToSquared(point);\n\n    var result = optionalTarget || new THREE.Vector3();\n    result.copy(point);\n\n    if (deltaLengthSq > this.radius * this.radius) {\n\n      result.sub(this.center).normalize();\n      result.multiplyScalar(this.radius).add(this.center);\n\n    }\n\n    return result;\n\n  },\n\n  getBoundingBox: function getBoundingBox(optionalTarget) {\n\n    var box = optionalTarget || new THREE.Box3();\n\n    box.set(this.center, this.center);\n    box.expandByScalar(this.radius);\n\n    return box;\n\n  },\n\n  applyMatrix4: function applyMatrix4(matrix) {\n\n    this.center.applyMatrix4(matrix);\n    this.radius = this.radius * matrix.getMaxScaleOnAxis();\n\n    return this;\n\n  },\n\n  translate: function translate(offset) {\n\n    this.center.add(offset);\n\n    return this;\n\n  },\n\n  equals: function equals(sphere) {\n\n    return sphere.center.equals(this.center) && sphere.radius === this.radius;\n\n  },\n\n  clone: function clone() {\n\n    return new THREE.Sphere().copy(this);\n\n  } };\n\n\n\n// File:src/math/Frustum.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n * @author bhouston / http://exocortex.com\n */\n\nTHREE.Frustum = function (p0, p1, p2, p3, p4, p5) {\n\n  this.planes = [\n\n  p0 !== undefined ? p0 : new THREE.Plane(),\n  p1 !== undefined ? p1 : new THREE.Plane(),\n  p2 !== undefined ? p2 : new THREE.Plane(),\n  p3 !== undefined ? p3 : new THREE.Plane(),\n  p4 !== undefined ? p4 : new THREE.Plane(),\n  p5 !== undefined ? p5 : new THREE.Plane()];\n\n\n\n};\n\nTHREE.Frustum.prototype = {\n\n  constructor: THREE.Frustum,\n\n  set: function set(p0, p1, p2, p3, p4, p5) {\n\n    var planes = this.planes;\n\n    planes[0].copy(p0);\n    planes[1].copy(p1);\n    planes[2].copy(p2);\n    planes[3].copy(p3);\n    planes[4].copy(p4);\n    planes[5].copy(p5);\n\n    return this;\n\n  },\n\n  copy: function copy(frustum) {\n\n    var planes = this.planes;\n\n    for (var i = 0; i < 6; i++) {\n\n      planes[i].copy(frustum.planes[i]);\n\n    }\n\n    return this;\n\n  },\n\n  setFromMatrix: function setFromMatrix(m) {\n\n    var planes = this.planes;\n    var me = m.elements;\n    var me0 = me[0],me1 = me[1],me2 = me[2],me3 = me[3];\n    var me4 = me[4],me5 = me[5],me6 = me[6],me7 = me[7];\n    var me8 = me[8],me9 = me[9],me10 = me[10],me11 = me[11];\n    var me12 = me[12],me13 = me[13],me14 = me[14],me15 = me[15];\n\n    planes[0].setComponents(me3 - me0, me7 - me4, me11 - me8, me15 - me12).normalize();\n    planes[1].setComponents(me3 + me0, me7 + me4, me11 + me8, me15 + me12).normalize();\n    planes[2].setComponents(me3 + me1, me7 + me5, me11 + me9, me15 + me13).normalize();\n    planes[3].setComponents(me3 - me1, me7 - me5, me11 - me9, me15 - me13).normalize();\n    planes[4].setComponents(me3 - me2, me7 - me6, me11 - me10, me15 - me14).normalize();\n    planes[5].setComponents(me3 + me2, me7 + me6, me11 + me10, me15 + me14).normalize();\n\n    return this;\n\n  },\n\n  intersectsObject: function () {\n\n    var sphere = new THREE.Sphere();\n\n    return function (object) {\n\n      var geometry = object.geometry;\n\n      if (geometry.boundingSphere === null) geometry.computeBoundingSphere();\n\n      sphere.copy(geometry.boundingSphere);\n      sphere.applyMatrix4(object.matrixWorld);\n\n      return this.intersectsSphere(sphere);\n\n    };\n\n  }(),\n\n  intersectsSphere: function intersectsSphere(sphere) {\n\n    var planes = this.planes;\n    var center = sphere.center;\n    var negRadius = -sphere.radius;\n\n    for (var i = 0; i < 6; i++) {\n\n      var distance = planes[i].distanceToPoint(center);\n\n      if (distance < negRadius) {\n\n        return false;\n\n      }\n\n    }\n\n    return true;\n\n  },\n\n  intersectsBox: function () {\n\n    var p1 = new THREE.Vector3(),\n    p2 = new THREE.Vector3();\n\n    return function (box) {\n\n      var planes = this.planes;\n\n      for (var i = 0; i < 6; i++) {\n\n        var plane = planes[i];\n\n        p1.x = plane.normal.x > 0 ? box.min.x : box.max.x;\n        p2.x = plane.normal.x > 0 ? box.max.x : box.min.x;\n        p1.y = plane.normal.y > 0 ? box.min.y : box.max.y;\n        p2.y = plane.normal.y > 0 ? box.max.y : box.min.y;\n        p1.z = plane.normal.z > 0 ? box.min.z : box.max.z;\n        p2.z = plane.normal.z > 0 ? box.max.z : box.min.z;\n\n        var d1 = plane.distanceToPoint(p1);\n        var d2 = plane.distanceToPoint(p2);\n\n        // if both outside plane, no intersection\n\n        if (d1 < 0 && d2 < 0) {\n\n          return false;\n\n        }\n      }\n\n      return true;\n    };\n\n  }(),\n\n\n  containsPoint: function containsPoint(point) {\n\n    var planes = this.planes;\n\n    for (var i = 0; i < 6; i++) {\n\n      if (planes[i].distanceToPoint(point) < 0) {\n\n        return false;\n\n      }\n\n    }\n\n    return true;\n\n  },\n\n  clone: function clone() {\n\n    return new THREE.Frustum().copy(this);\n\n  } };\n\n\n\n// File:src/math/Plane.js\n\n/**\n * @author bhouston / http://exocortex.com\n */\n\nTHREE.Plane = function (normal, constant) {\n\n  this.normal = normal !== undefined ? normal : new THREE.Vector3(1, 0, 0);\n  this.constant = constant !== undefined ? constant : 0;\n\n};\n\nTHREE.Plane.prototype = {\n\n  constructor: THREE.Plane,\n\n  set: function set(normal, constant) {\n\n    this.normal.copy(normal);\n    this.constant = constant;\n\n    return this;\n\n  },\n\n  setComponents: function setComponents(x, y, z, w) {\n\n    this.normal.set(x, y, z);\n    this.constant = w;\n\n    return this;\n\n  },\n\n  setFromNormalAndCoplanarPoint: function setFromNormalAndCoplanarPoint(normal, point) {\n\n    this.normal.copy(normal);\n    this.constant = -point.dot(this.normal); // must be this.normal, not normal, as this.normal is normalized\n\n    return this;\n\n  },\n\n  setFromCoplanarPoints: function () {\n\n    var v1 = new THREE.Vector3();\n    var v2 = new THREE.Vector3();\n\n    return function (a, b, c) {\n\n      var normal = v1.subVectors(c, b).cross(v2.subVectors(a, b)).normalize();\n\n      // Q: should an error be thrown if normal is zero (e.g. degenerate plane)?\n\n      this.setFromNormalAndCoplanarPoint(normal, a);\n\n      return this;\n\n    };\n\n  }(),\n\n\n  copy: function copy(plane) {\n\n    this.normal.copy(plane.normal);\n    this.constant = plane.constant;\n\n    return this;\n\n  },\n\n  normalize: function normalize() {\n\n    // Note: will lead to a divide by zero if the plane is invalid.\n\n    var inverseNormalLength = 1.0 / this.normal.length();\n    this.normal.multiplyScalar(inverseNormalLength);\n    this.constant *= inverseNormalLength;\n\n    return this;\n\n  },\n\n  negate: function negate() {\n\n    this.constant *= -1;\n    this.normal.negate();\n\n    return this;\n\n  },\n\n  distanceToPoint: function distanceToPoint(point) {\n\n    return this.normal.dot(point) + this.constant;\n\n  },\n\n  distanceToSphere: function distanceToSphere(sphere) {\n\n    return this.distanceToPoint(sphere.center) - sphere.radius;\n\n  },\n\n  projectPoint: function projectPoint(point, optionalTarget) {\n\n    return this.orthoPoint(point, optionalTarget).sub(point).negate();\n\n  },\n\n  orthoPoint: function orthoPoint(point, optionalTarget) {\n\n    var perpendicularMagnitude = this.distanceToPoint(point);\n\n    var result = optionalTarget || new THREE.Vector3();\n    return result.copy(this.normal).multiplyScalar(perpendicularMagnitude);\n\n  },\n\n  isIntersectionLine: function isIntersectionLine(line) {\n\n    // Note: this tests if a line intersects the plane, not whether it (or its end-points) are coplanar with it.\n\n    var startSign = this.distanceToPoint(line.start);\n    var endSign = this.distanceToPoint(line.end);\n\n    return startSign < 0 && endSign > 0 || endSign < 0 && startSign > 0;\n\n  },\n\n  intersectLine: function () {\n\n    var v1 = new THREE.Vector3();\n\n    return function (line, optionalTarget) {\n\n      var result = optionalTarget || new THREE.Vector3();\n\n      var direction = line.delta(v1);\n\n      var denominator = this.normal.dot(direction);\n\n      if (denominator == 0) {\n\n        // line is coplanar, return origin\n        if (this.distanceToPoint(line.start) == 0) {\n\n          return result.copy(line.start);\n\n        }\n\n        // Unsure if this is the correct method to handle this case.\n        return undefined;\n\n      }\n\n      var t = -(line.start.dot(this.normal) + this.constant) / denominator;\n\n      if (t < 0 || t > 1) {\n\n        return undefined;\n\n      }\n\n      return result.copy(direction).multiplyScalar(t).add(line.start);\n\n    };\n\n  }(),\n\n\n  coplanarPoint: function coplanarPoint(optionalTarget) {\n\n    var result = optionalTarget || new THREE.Vector3();\n    return result.copy(this.normal).multiplyScalar(-this.constant);\n\n  },\n\n  applyMatrix4: function () {\n\n    var v1 = new THREE.Vector3();\n    var v2 = new THREE.Vector3();\n    var m1 = new THREE.Matrix3();\n\n    return function (matrix, optionalNormalMatrix) {\n\n      // compute new normal based on theory here:\n      // http://www.songho.ca/opengl/gl_normaltransform.html\n      var normalMatrix = optionalNormalMatrix || m1.getNormalMatrix(matrix);\n      var newNormal = v1.copy(this.normal).applyMatrix3(normalMatrix);\n\n      // LMV-Patch: [HB] Added missing re-normalization. Note that it is important to do this here\n      // already, because it also affects the recomputation of this.constant.\n      newNormal.normalize();\n\n      var newCoplanarPoint = this.coplanarPoint(v2);\n      newCoplanarPoint.applyMatrix4(matrix);\n\n      this.setFromNormalAndCoplanarPoint(newNormal, newCoplanarPoint);\n\n      return this;\n\n    };\n\n  }(),\n\n  translate: function translate(offset) {\n\n    this.constant = this.constant - offset.dot(this.normal);\n\n    return this;\n\n  },\n\n  equals: function equals(plane) {\n\n    return plane.normal.equals(this.normal) && plane.constant == this.constant;\n\n  },\n\n  clone: function clone() {\n\n    return new THREE.Plane().copy(this);\n\n  } };\n\n\n\n// File:src/math/Math.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.Math = {\n\n  generateUUID: function () {\n\n    // http://www.broofa.com/Tools/Math.uuid.htm\n\n    var chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('');\n    var uuid = new Array(36);\n    var rnd = 0,r;\n\n    return function () {\n\n      for (var i = 0; i < 36; i++) {\n\n        if (i == 8 || i == 13 || i == 18 || i == 23) {\n\n          uuid[i] = '-';\n\n        } else if (i == 14) {\n\n          uuid[i] = '4';\n\n        } else {\n\n          if (rnd <= 0x02) rnd = 0x2000000 + Math.random() * 0x1000000 | 0;\n          r = rnd & 0xf;\n          rnd = rnd >> 4;\n          uuid[i] = chars[i == 19 ? r & 0x3 | 0x8 : r];\n\n        }\n      }\n\n      return uuid.join('');\n\n    };\n\n  }(),\n\n  // Clamp value to range <a, b>\n\n  clamp: function clamp(x, a, b) {\n\n    return x < a ? a : x > b ? b : x;\n\n  },\n\n  // Clamp value to range <a, inf)\n\n  clampBottom: function clampBottom(x, a) {\n\n    return x < a ? a : x;\n\n  },\n\n  // Linear mapping from range <a1, a2> to range <b1, b2>\n\n  mapLinear: function mapLinear(x, a1, a2, b1, b2) {\n\n    return b1 + (x - a1) * (b2 - b1) / (a2 - a1);\n\n  },\n\n  // http://en.wikipedia.org/wiki/Smoothstep\n\n  smoothstep: function smoothstep(x, min, max) {\n\n    if (x <= min) return 0;\n    if (x >= max) return 1;\n\n    x = (x - min) / (max - min);\n\n    return x * x * (3 - 2 * x);\n\n  },\n\n  smootherstep: function smootherstep(x, min, max) {\n\n    if (x <= min) return 0;\n    if (x >= max) return 1;\n\n    x = (x - min) / (max - min);\n\n    return x * x * x * (x * (x * 6 - 15) + 10);\n\n  },\n\n  // Random float from <0, 1> with 16 bits of randomness\n  // (standard Math.random() creates repetitive patterns when applied over larger space)\n\n  random16: function random16() {\n\n    return (65280 * Math.random() + 255 * Math.random()) / 65535;\n\n  },\n\n  // Random integer from <low, high> interval\n\n  randInt: function randInt(low, high) {\n\n    return Math.floor(this.randFloat(low, high));\n\n  },\n\n  // Random float from <low, high> interval\n\n  randFloat: function randFloat(low, high) {\n\n    return low + Math.random() * (high - low);\n\n  },\n\n  // Random float from <-range/2, range/2> interval\n\n  randFloatSpread: function randFloatSpread(range) {\n\n    return range * (0.5 - Math.random());\n\n  },\n\n  degToRad: function () {\n\n    var degreeToRadiansFactor = Math.PI / 180;\n\n    return function (degrees) {\n\n      return degrees * degreeToRadiansFactor;\n\n    };\n\n  }(),\n\n  radToDeg: function () {\n\n    var radianToDegreesFactor = 180 / Math.PI;\n\n    return function (radians) {\n\n      return radians * radianToDegreesFactor;\n\n    };\n\n  }(),\n\n  isPowerOfTwo: function isPowerOfTwo(value) {\n\n    return (value & value - 1) === 0 && value !== 0;\n\n  },\n\n  nextPowerOfTwo: function nextPowerOfTwo(value) {\n\n    value--;\n    value |= value >> 1;\n    value |= value >> 2;\n    value |= value >> 4;\n    value |= value >> 8;\n    value |= value >> 16;\n    value++;\n\n    return value;\n\n  } };\n\n\n\n// File:src/math/Spline.js\n\n/**\n * Spline from Tween.js, slightly optimized (and trashed)\n * http://sole.github.com/tween.js/examples/05_spline.html\n *\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.Spline = function (points) {\n\n  this.points = points;\n\n  var c = [],v3 = { x: 0, y: 0, z: 0 },\n  point,intPoint,weight,w2,w3,\n  pa,pb,pc,pd;\n\n  this.initFromArray = function (a) {\n\n    this.points = [];\n\n    for (var i = 0; i < a.length; i++) {\n\n      this.points[i] = { x: a[i][0], y: a[i][1], z: a[i][2] };\n\n    }\n\n  };\n\n  this.getPoint = function (k) {\n\n    point = (this.points.length - 1) * k;\n    intPoint = Math.floor(point);\n    weight = point - intPoint;\n\n    c[0] = intPoint === 0 ? intPoint : intPoint - 1;\n    c[1] = intPoint;\n    c[2] = intPoint > this.points.length - 2 ? this.points.length - 1 : intPoint + 1;\n    c[3] = intPoint > this.points.length - 3 ? this.points.length - 1 : intPoint + 2;\n\n    pa = this.points[c[0]];\n    pb = this.points[c[1]];\n    pc = this.points[c[2]];\n    pd = this.points[c[3]];\n\n    w2 = weight * weight;\n    w3 = weight * w2;\n\n    v3.x = interpolate(pa.x, pb.x, pc.x, pd.x, weight, w2, w3);\n    v3.y = interpolate(pa.y, pb.y, pc.y, pd.y, weight, w2, w3);\n    v3.z = interpolate(pa.z, pb.z, pc.z, pd.z, weight, w2, w3);\n\n    return v3;\n\n  };\n\n  this.getControlPointsArray = function () {\n\n    var i,p,l = this.points.length,\n    coords = [];\n\n    for (i = 0; i < l; i++) {\n\n      p = this.points[i];\n      coords[i] = [p.x, p.y, p.z];\n\n    }\n\n    return coords;\n\n  };\n\n  // approximate length by summing linear segments\n\n  this.getLength = function (nSubDivisions) {\n\n    var i,index,nSamples,position,\n    point = 0,intPoint = 0,oldIntPoint = 0,\n    oldPosition = new THREE.Vector3(),\n    tmpVec = new THREE.Vector3(),\n    chunkLengths = [],\n    totalLength = 0;\n\n    // first point has 0 length\n\n    chunkLengths[0] = 0;\n\n    if (!nSubDivisions) nSubDivisions = 100;\n\n    nSamples = this.points.length * nSubDivisions;\n\n    oldPosition.copy(this.points[0]);\n\n    for (i = 1; i < nSamples; i++) {\n\n      index = i / nSamples;\n\n      position = this.getPoint(index);\n      tmpVec.copy(position);\n\n      totalLength += tmpVec.distanceTo(oldPosition);\n\n      oldPosition.copy(position);\n\n      point = (this.points.length - 1) * index;\n      intPoint = Math.floor(point);\n\n      if (intPoint != oldIntPoint) {\n\n        chunkLengths[intPoint] = totalLength;\n        oldIntPoint = intPoint;\n\n      }\n\n    }\n\n    // last point ends with total length\n\n    chunkLengths[chunkLengths.length] = totalLength;\n\n    return { chunks: chunkLengths, total: totalLength };\n\n  };\n\n  this.reparametrizeByArcLength = function (samplingCoef) {\n\n    var i,j,\n    index,indexCurrent,indexNext,\n    realDistance,\n    sampling,position,\n    newpoints = [],\n    tmpVec = new THREE.Vector3(),\n    sl = this.getLength();\n\n    newpoints.push(tmpVec.copy(this.points[0]).clone());\n\n    for (i = 1; i < this.points.length; i++) {\n\n      //tmpVec.copy( this.points[ i - 1 ] );\n      //linearDistance = tmpVec.distanceTo( this.points[ i ] );\n\n      realDistance = sl.chunks[i] - sl.chunks[i - 1];\n\n      sampling = Math.ceil(samplingCoef * realDistance / sl.total);\n\n      indexCurrent = (i - 1) / (this.points.length - 1);\n      indexNext = i / (this.points.length - 1);\n\n      for (j = 1; j < sampling - 1; j++) {\n\n        index = indexCurrent + j * (1 / sampling) * (indexNext - indexCurrent);\n\n        position = this.getPoint(index);\n        newpoints.push(tmpVec.copy(position).clone());\n\n      }\n\n      newpoints.push(tmpVec.copy(this.points[i]).clone());\n\n    }\n\n    this.points = newpoints;\n\n  };\n\n  // Catmull-Rom\n\n  function interpolate(p0, p1, p2, p3, t, t2, t3) {\n\n    var v0 = (p2 - p0) * 0.5,\n    v1 = (p3 - p1) * 0.5;\n\n    return (2 * (p1 - p2) + v0 + v1) * t3 + (-3 * (p1 - p2) - 2 * v0 - v1) * t2 + v0 * t + p1;\n\n  };\n\n};\n\n// File:src/math/Triangle.js\n\n/**\n * @author bhouston / http://exocortex.com\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.Triangle = function (a, b, c) {\n\n  this.a = a !== undefined ? a : new THREE.Vector3();\n  this.b = b !== undefined ? b : new THREE.Vector3();\n  this.c = c !== undefined ? c : new THREE.Vector3();\n\n};\n\nTHREE.Triangle.normal = function () {\n\n  var v0 = new THREE.Vector3();\n\n  return function (a, b, c, optionalTarget) {\n\n    var result = optionalTarget || new THREE.Vector3();\n\n    result.subVectors(c, b);\n    v0.subVectors(a, b);\n    result.cross(v0);\n\n    var resultLengthSq = result.lengthSq();\n    if (resultLengthSq > 0) {\n\n      return result.multiplyScalar(1 / Math.sqrt(resultLengthSq));\n\n    }\n\n    return result.set(0, 0, 0);\n\n  };\n\n}();\n\n// static/instance method to calculate barycoordinates\n// based on: http://www.blackpawn.com/texts/pointinpoly/default.html\nTHREE.Triangle.barycoordFromPoint = function () {\n\n  var v0 = new THREE.Vector3();\n  var v1 = new THREE.Vector3();\n  var v2 = new THREE.Vector3();\n\n  return function (point, a, b, c, optionalTarget) {\n\n    v0.subVectors(c, a);\n    v1.subVectors(b, a);\n    v2.subVectors(point, a);\n\n    var dot00 = v0.dot(v0);\n    var dot01 = v0.dot(v1);\n    var dot02 = v0.dot(v2);\n    var dot11 = v1.dot(v1);\n    var dot12 = v1.dot(v2);\n\n    var denom = dot00 * dot11 - dot01 * dot01;\n\n    var result = optionalTarget || new THREE.Vector3();\n\n    // colinear or singular triangle\n    if (denom == 0) {\n      // arbitrary location outside of triangle?\n      // not sure if this is the best idea, maybe should be returning undefined\n      return result.set(-2, -1, -1);\n    }\n\n    var invDenom = 1 / denom;\n    var u = (dot11 * dot02 - dot01 * dot12) * invDenom;\n    var v = (dot00 * dot12 - dot01 * dot02) * invDenom;\n\n    // barycoordinates must always sum to 1\n    return result.set(1 - u - v, v, u);\n\n  };\n\n}();\n\nTHREE.Triangle.containsPoint = function () {\n\n  var v1 = new THREE.Vector3();\n\n  return function (point, a, b, c) {\n\n    var result = THREE.Triangle.barycoordFromPoint(point, a, b, c, v1);\n\n    return result.x >= 0 && result.y >= 0 && result.x + result.y <= 1;\n\n  };\n\n}();\n\nTHREE.Triangle.prototype = {\n\n  constructor: THREE.Triangle,\n\n  set: function set(a, b, c) {\n\n    this.a.copy(a);\n    this.b.copy(b);\n    this.c.copy(c);\n\n    return this;\n\n  },\n\n  setFromPointsAndIndices: function setFromPointsAndIndices(points, i0, i1, i2) {\n\n    this.a.copy(points[i0]);\n    this.b.copy(points[i1]);\n    this.c.copy(points[i2]);\n\n    return this;\n\n  },\n\n  copy: function copy(triangle) {\n\n    this.a.copy(triangle.a);\n    this.b.copy(triangle.b);\n    this.c.copy(triangle.c);\n\n    return this;\n\n  },\n\n  area: function () {\n\n    var v0 = new THREE.Vector3();\n    var v1 = new THREE.Vector3();\n\n    return function () {\n\n      v0.subVectors(this.c, this.b);\n      v1.subVectors(this.a, this.b);\n\n      return v0.cross(v1).length() * 0.5;\n\n    };\n\n  }(),\n\n  midpoint: function midpoint(optionalTarget) {\n\n    var result = optionalTarget || new THREE.Vector3();\n    return result.addVectors(this.a, this.b).add(this.c).multiplyScalar(1 / 3);\n\n  },\n\n  normal: function normal(optionalTarget) {\n\n    return THREE.Triangle.normal(this.a, this.b, this.c, optionalTarget);\n\n  },\n\n  plane: function plane(optionalTarget) {\n\n    var result = optionalTarget || new THREE.Plane();\n\n    return result.setFromCoplanarPoints(this.a, this.b, this.c);\n\n  },\n\n  barycoordFromPoint: function barycoordFromPoint(point, optionalTarget) {\n\n    return THREE.Triangle.barycoordFromPoint(point, this.a, this.b, this.c, optionalTarget);\n\n  },\n\n  containsPoint: function containsPoint(point) {\n\n    return THREE.Triangle.containsPoint(point, this.a, this.b, this.c);\n\n  },\n\n  equals: function equals(triangle) {\n\n    return triangle.a.equals(this.a) && triangle.b.equals(this.b) && triangle.c.equals(this.c);\n\n  },\n\n  clone: function clone() {\n\n    return new THREE.Triangle().copy(this);\n\n  } };\n\n\n\n// File:src/core/Clock.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.Clock = function (autoStart) {\n\n  this.autoStart = autoStart !== undefined ? autoStart : true;\n\n  this.startTime = 0;\n  this.oldTime = 0;\n  this.elapsedTime = 0;\n\n  this.running = false;\n\n};\n\nTHREE.Clock.prototype = {\n\n  constructor: THREE.Clock,\n\n  start: function start() {\n\n    this.startTime = self.performance !== undefined && self.performance.now !== undefined ?\n    self.performance.now() :\n    Date.now();\n\n    this.oldTime = this.startTime;\n    this.running = true;\n  },\n\n  stop: function stop() {\n\n    this.getElapsedTime();\n    this.running = false;\n\n  },\n\n  getElapsedTime: function getElapsedTime() {\n\n    this.getDelta();\n    return this.elapsedTime;\n\n  },\n\n  getDelta: function getDelta() {\n\n    var diff = 0;\n\n    if (this.autoStart && !this.running) {\n\n      this.start();\n\n    }\n\n    if (this.running) {\n\n      var newTime = self.performance !== undefined && self.performance.now !== undefined ?\n      self.performance.now() :\n      Date.now();\n\n      diff = 0.001 * (newTime - this.oldTime);\n      this.oldTime = newTime;\n\n      this.elapsedTime += diff;\n\n    }\n\n    return diff;\n\n  } };\n\n\n\n// File:src/core/EventDispatcher.js\n\n/**\n * https://github.com/mrdoob/eventdispatcher.js/\n */\n\nTHREE.EventDispatcher = function () {};\n\nTHREE.EventDispatcher.prototype = {\n\n  constructor: THREE.EventDispatcher,\n\n  apply: function apply(object) {\n\n    object.addEventListener = THREE.EventDispatcher.prototype.addEventListener;\n    object.hasEventListener = THREE.EventDispatcher.prototype.hasEventListener;\n    object.removeEventListener = THREE.EventDispatcher.prototype.removeEventListener;\n    object.dispatchEvent = THREE.EventDispatcher.prototype.dispatchEvent;\n\n  },\n\n  addEventListener: function addEventListener(type, listener) {\n\n    if (this._listeners === undefined) this._listeners = {};\n\n    var listeners = this._listeners;\n\n    if (listeners[type] === undefined) {\n\n      listeners[type] = [];\n\n    }\n\n    if (listeners[type].indexOf(listener) === -1) {\n\n      listeners[type].push(listener);\n\n    }\n\n  },\n\n  hasEventListener: function hasEventListener(type, listener) {\n\n    if (this._listeners === undefined) return false;\n\n    var listeners = this._listeners;\n\n    if (listeners[type] !== undefined && listeners[type].indexOf(listener) !== -1) {\n\n      return true;\n\n    }\n\n    return false;\n\n  },\n\n  removeEventListener: function removeEventListener(type, listener) {\n\n    if (this._listeners === undefined) return;\n\n    var listeners = this._listeners;\n    var listenerArray = listeners[type];\n\n    if (listenerArray !== undefined) {\n\n      var index = listenerArray.indexOf(listener);\n\n      if (index !== -1) {\n\n        listenerArray.splice(index, 1);\n\n      }\n\n    }\n\n  },\n\n  dispatchEvent: function dispatchEvent(event) {\n\n    if (this._listeners === undefined) return;\n\n    var listeners = this._listeners;\n    var listenerArray = listeners[event.type];\n\n    if (listenerArray !== undefined) {\n\n      event.target = this;\n\n      var array = [];\n      var length = listenerArray.length;\n\n      for (var i = 0; i < length; i++) {\n\n        array[i] = listenerArray[i];\n\n      }\n\n      for (var i = 0; i < length; i++) {\n\n        array[i].call(this, event);\n\n      }\n\n    }\n\n  } };\n\n\n\n// File:src/core/Raycaster.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author bhouston / http://exocortex.com/\n * @author stephomi / http://stephaneginier.com/\n */\n\n(function (THREE) {\n\n  THREE.Raycaster = function (origin, direction, near, far) {\n\n    this.ray = new THREE.Ray(origin, direction);\n    // direction is assumed to be normalized (for accurate distance calculations)\n\n    this.near = near || 0;\n    this.far = far || Infinity;\n\n    this.params = {\n      Sprite: {},\n      Mesh: {},\n      PointCloud: { threshold: 1 },\n      LOD: {},\n      Line: {} };\n\n\n  };\n\n  var descSort = function descSort(a, b) {\n\n    return a.distance - b.distance;\n\n  };\n\n  var _intersectObject = function intersectObject(object, raycaster, intersects, recursive) {\n\n    object.raycast(raycaster, intersects);\n\n    if (recursive === true) {\n\n      var children = object.children;\n\n      for (var i = 0, l = children.length; i < l; i++) {\n\n        _intersectObject(children[i], raycaster, intersects, true);\n\n      }\n\n    }\n\n  };\n\n  //\n\n  THREE.Raycaster.prototype = {\n\n    constructor: THREE.Raycaster,\n\n    precision: 0.0001,\n    linePrecision: 1,\n\n    set: function set(origin, direction) {\n\n      // direction is assumed to be normalized (for accurate distance calculations)\n\n      this.ray.set(origin, direction);\n\n    },\n\n    setFromCamera: function setFromCamera(coords, camera) {\n\n      // camera is assumed _not_ to be a child of a transformed object\n\n      if (camera instanceof THREE.PerspectiveCamera) {\n\n        this.ray.origin.copy(camera.position);\n        this.ray.direction.set(coords.x, coords.y, 0.5).unproject(camera).sub(camera.position).normalize();\n\n      } else if (camera instanceof THREE.OrthographicCamera) {\n\n        this.ray.origin.set(coords.x, coords.y, -1).unproject(camera);\n        this.ray.direction.set(0, 0, -1).transformDirection(camera.matrixWorld);\n\n      } else {\n\n        THREE.error('THREE.Raycaster: Unsupported camera type.');\n\n      }\n\n    },\n\n    intersectObject: function intersectObject(object, recursive) {\n\n      var intersects = [];\n\n      _intersectObject(object, this, intersects, recursive);\n\n      intersects.sort(descSort);\n\n      return intersects;\n\n    },\n\n    intersectObjects: function intersectObjects(objects, recursive) {\n\n      var intersects = [];\n\n      if (objects instanceof Array === false) {\n\n        THREE.warn('THREE.Raycaster.intersectObjects: objects is not an Array.');\n        return intersects;\n\n      }\n\n      for (var i = 0, l = objects.length; i < l; i++) {\n\n        _intersectObject(objects[i], this, intersects, recursive);\n\n      }\n\n      intersects.sort(descSort);\n\n      return intersects;\n\n    } };\n\n\n\n})(THREE);\n\n// File:src/core/Object3D.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author mikael emtinger / http://gomo.se/\n * @author alteredq / http://alteredqualia.com/\n * @author WestLangley / http://github.com/WestLangley\n */\n\nTHREE.Object3D = function () {\n\n  Object.defineProperty(this, 'id', { value: THREE.Object3DIdCount++ });\n\n  this.uuid = THREE.Math.generateUUID();\n\n  this.name = '';\n  this.type = 'Object3D';\n\n  this.parent = undefined;\n  this.children = [];\n\n  this.up = THREE.Object3D.DefaultUp.clone();\n\n  var position = new THREE.Vector3();\n  var rotation = new THREE.Euler();\n  var quaternion = new THREE.Quaternion();\n  var scale = new THREE.Vector3(1, 1, 1);\n\n  var onRotationChange = function onRotationChange() {\n    quaternion.setFromEuler(rotation, false);\n  };\n\n  var onQuaternionChange = function onQuaternionChange() {\n    rotation.setFromQuaternion(quaternion, undefined, false);\n  };\n\n  rotation.onChange(onRotationChange);\n  quaternion.onChange(onQuaternionChange);\n\n  Object.defineProperties(this, {\n    position: {\n      enumerable: true,\n      value: position },\n\n    rotation: {\n      enumerable: true,\n      value: rotation },\n\n    quaternion: {\n      enumerable: true,\n      value: quaternion },\n\n    scale: {\n      enumerable: true,\n      value: scale } });\n\n\n\n  this.rotationAutoUpdate = true;\n\n  this.matrix = new THREE.Matrix4();\n  this.matrixWorld = new THREE.Matrix4();\n\n  this.matrixAutoUpdate = true;\n  this.matrixWorldNeedsUpdate = false;\n\n  this.visible = true;\n\n  this.castShadow = false;\n  this.receiveShadow = false;\n\n  this.frustumCulled = true;\n  this.renderOrder = 0;\n\n  this.userData = {};\n\n};\n\nTHREE.Object3D.DefaultUp = new THREE.Vector3(0, 1, 0);\n\nTHREE.Object3D.prototype = {\n\n  constructor: THREE.Object3D,\n\n  get eulerOrder() {\n\n    THREE.warn('THREE.Object3D: .eulerOrder has been moved to .rotation.order.');\n\n    return this.rotation.order;\n\n  },\n\n  set eulerOrder(value) {\n\n    THREE.warn('THREE.Object3D: .eulerOrder has been moved to .rotation.order.');\n\n    this.rotation.order = value;\n\n  },\n\n  get useQuaternion() {\n\n    THREE.warn('THREE.Object3D: .useQuaternion has been removed. The library now uses quaternions by default.');\n\n  },\n\n  set useQuaternion(value) {\n\n    THREE.warn('THREE.Object3D: .useQuaternion has been removed. The library now uses quaternions by default.');\n\n  },\n\n  applyMatrix: function applyMatrix(matrix) {\n\n    this.matrix.multiplyMatrices(matrix, this.matrix);\n\n    this.matrix.decompose(this.position, this.quaternion, this.scale);\n\n  },\n\n  setRotationFromAxisAngle: function setRotationFromAxisAngle(axis, angle) {\n\n    // assumes axis is normalized\n\n    this.quaternion.setFromAxisAngle(axis, angle);\n\n  },\n\n  setRotationFromEuler: function setRotationFromEuler(euler) {\n\n    this.quaternion.setFromEuler(euler, true);\n\n  },\n\n  setRotationFromMatrix: function setRotationFromMatrix(m) {\n\n    // assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled)\n\n    this.quaternion.setFromRotationMatrix(m);\n\n  },\n\n  setRotationFromQuaternion: function setRotationFromQuaternion(q) {\n\n    // assumes q is normalized\n\n    this.quaternion.copy(q);\n\n  },\n\n  rotateOnAxis: function () {\n\n    // rotate object on axis in object space\n    // axis is assumed to be normalized\n\n    var q1 = new THREE.Quaternion();\n\n    return function (axis, angle) {\n\n      q1.setFromAxisAngle(axis, angle);\n\n      this.quaternion.multiply(q1);\n\n      return this;\n\n    };\n\n  }(),\n\n  rotateX: function () {\n\n    var v1 = new THREE.Vector3(1, 0, 0);\n\n    return function (angle) {\n\n      return this.rotateOnAxis(v1, angle);\n\n    };\n\n  }(),\n\n  rotateY: function () {\n\n    var v1 = new THREE.Vector3(0, 1, 0);\n\n    return function (angle) {\n\n      return this.rotateOnAxis(v1, angle);\n\n    };\n\n  }(),\n\n  rotateZ: function () {\n\n    var v1 = new THREE.Vector3(0, 0, 1);\n\n    return function (angle) {\n\n      return this.rotateOnAxis(v1, angle);\n\n    };\n\n  }(),\n\n  translateOnAxis: function () {\n\n    // translate object by distance along axis in object space\n    // axis is assumed to be normalized\n\n    var v1 = new THREE.Vector3();\n\n    return function (axis, distance) {\n\n      v1.copy(axis).applyQuaternion(this.quaternion);\n\n      this.position.add(v1.multiplyScalar(distance));\n\n      return this;\n\n    };\n\n  }(),\n\n  translate: function translate(distance, axis) {\n\n    THREE.warn('THREE.Object3D: .translate() has been removed. Use .translateOnAxis( axis, distance ) instead.');\n    return this.translateOnAxis(axis, distance);\n\n  },\n\n  translateX: function () {\n\n    var v1 = new THREE.Vector3(1, 0, 0);\n\n    return function (distance) {\n\n      return this.translateOnAxis(v1, distance);\n\n    };\n\n  }(),\n\n  translateY: function () {\n\n    var v1 = new THREE.Vector3(0, 1, 0);\n\n    return function (distance) {\n\n      return this.translateOnAxis(v1, distance);\n\n    };\n\n  }(),\n\n  translateZ: function () {\n\n    var v1 = new THREE.Vector3(0, 0, 1);\n\n    return function (distance) {\n\n      return this.translateOnAxis(v1, distance);\n\n    };\n\n  }(),\n\n  localToWorld: function localToWorld(vector) {\n\n    return vector.applyMatrix4(this.matrixWorld);\n\n  },\n\n  worldToLocal: function () {\n\n    var m1 = new THREE.Matrix4();\n\n    return function (vector) {\n\n      return vector.applyMatrix4(m1.getInverse(this.matrixWorld));\n\n    };\n\n  }(),\n\n  lookAt: function () {\n\n    // This routine does not support objects with rotated and/or translated parent(s)\n\n    var m1 = new THREE.Matrix4();\n\n    return function (vector) {\n\n      m1.lookAt(vector, this.position, this.up);\n\n      this.quaternion.setFromRotationMatrix(m1);\n\n    };\n\n  }(),\n\n  add: function add(object) {\n\n    if (arguments.length > 1) {\n\n      for (var i = 0; i < arguments.length; i++) {\n\n        this.add(arguments[i]);\n\n      }\n\n      return this;\n\n    };\n\n    if (object === this) {\n\n      THREE.error(\"THREE.Object3D.add: object can't be added as a child of itself.\", object);\n      return this;\n\n    }\n\n    if (object instanceof THREE.Object3D) {\n\n      if (object.parent !== undefined) {\n\n        object.parent.remove(object);\n\n      }\n\n      object.parent = this;\n      object.dispatchEvent({ type: 'added' });\n\n      this.children.push(object);\n\n    } else {\n\n      THREE.error(\"THREE.Object3D.add: object not an instance of THREE.Object3D.\", object);\n\n    }\n\n    return this;\n\n  },\n\n  remove: function remove(object) {\n\n    if (arguments.length > 1) {\n\n      for (var i = 0; i < arguments.length; i++) {\n\n        this.remove(arguments[i]);\n\n      }\n\n    };\n\n    var index = this.children.indexOf(object);\n\n    if (index !== -1) {\n\n      object.parent = undefined;\n\n      object.dispatchEvent({ type: 'removed' });\n\n      this.children.splice(index, 1);\n\n    }\n\n  },\n\n  getChildByName: function getChildByName(name) {\n\n    THREE.warn('THREE.Object3D: .getChildByName() has been renamed to .getObjectByName().');\n    return this.getObjectByName(name);\n\n  },\n\n  getObjectById: function getObjectById(id) {\n\n    return this.getObjectByProperty('id', id);\n\n  },\n\n  getObjectByName: function getObjectByName(name) {\n\n    return this.getObjectByProperty('name', name);\n\n  },\n\n  getObjectByProperty: function getObjectByProperty(name, value) {\n\n    if (this[name] === value) return this;\n\n    for (var i = 0, l = this.children.length; i < l; i++) {\n\n      var child = this.children[i];\n      var object = child.getObjectByProperty(name, value);\n\n      if (object !== undefined) {\n\n        return object;\n\n      }\n\n    }\n\n    return undefined;\n\n  },\n\n  getWorldPosition: function getWorldPosition(optionalTarget) {\n\n    var result = optionalTarget || new THREE.Vector3();\n\n    this.updateMatrixWorld(true);\n\n    return result.setFromMatrixPosition(this.matrixWorld);\n\n  },\n\n  getWorldQuaternion: function () {\n\n    var position = new THREE.Vector3();\n    var scale = new THREE.Vector3();\n\n    return function (optionalTarget) {\n\n      var result = optionalTarget || new THREE.Quaternion();\n\n      this.updateMatrixWorld(true);\n\n      this.matrixWorld.decompose(position, result, scale);\n\n      return result;\n\n    };\n\n  }(),\n\n  getWorldRotation: function () {\n\n    var quaternion = new THREE.Quaternion();\n\n    return function (optionalTarget) {\n\n      var result = optionalTarget || new THREE.Euler();\n\n      this.getWorldQuaternion(quaternion);\n\n      return result.setFromQuaternion(quaternion, this.rotation.order, false);\n\n    };\n\n  }(),\n\n  getWorldScale: function () {\n\n    var position = new THREE.Vector3();\n    var quaternion = new THREE.Quaternion();\n\n    return function (optionalTarget) {\n\n      var result = optionalTarget || new THREE.Vector3();\n\n      this.updateMatrixWorld(true);\n\n      this.matrixWorld.decompose(position, quaternion, result);\n\n      return result;\n\n    };\n\n  }(),\n\n  getWorldDirection: function () {\n\n    var quaternion = new THREE.Quaternion();\n\n    return function (optionalTarget) {\n\n      var result = optionalTarget || new THREE.Vector3();\n\n      this.getWorldQuaternion(quaternion);\n\n      return result.set(0, 0, 1).applyQuaternion(quaternion);\n\n    };\n\n  }(),\n\n  raycast: function raycast() {},\n\n  traverse: function traverse(callback) {\n\n    callback(this);\n\n    for (var i = 0, l = this.children.length; i < l; i++) {\n\n      this.children[i].traverse(callback);\n\n    }\n\n  },\n\n  traverseVisible: function traverseVisible(callback) {\n\n    if (this.visible === false) return;\n\n    callback(this);\n\n    for (var i = 0, l = this.children.length; i < l; i++) {\n\n      this.children[i].traverseVisible(callback);\n\n    }\n\n  },\n\n  traverseAncestors: function traverseAncestors(callback) {\n\n    if (this.parent) {\n\n      callback(this.parent);\n\n      this.parent.traverseAncestors(callback);\n\n    }\n\n  },\n\n  updateMatrix: function updateMatrix() {\n\n    this.matrix.compose(this.position, this.quaternion, this.scale);\n\n    this.matrixWorldNeedsUpdate = true;\n\n  },\n\n  updateMatrixWorld: function updateMatrixWorld(force) {\n\n    if (this.matrixAutoUpdate === true) this.updateMatrix();\n\n    if (this.matrixWorldNeedsUpdate === true || force === true) {\n\n      if (this.parent === undefined) {\n\n        this.matrixWorld.copy(this.matrix);\n\n      } else {\n\n        this.matrixWorld.multiplyMatrices(this.parent.matrixWorld, this.matrix);\n\n      }\n\n      this.matrixWorldNeedsUpdate = false;\n\n      force = true;\n\n    }\n\n    // update children\n\n    for (var i = 0, l = this.children.length; i < l; i++) {\n\n      this.children[i].updateMatrixWorld(force);\n\n    }\n\n  },\n\n  toJSON: function toJSON() {\n\n    var output = {\n      metadata: {\n        version: 4.3,\n        type: 'Object',\n        generator: 'ObjectExporter' } };\n\n\n\n    //\n\n    var geometries = {};\n\n    var parseGeometry = function parseGeometry(geometry) {\n\n      if (output.geometries === undefined) {\n\n        output.geometries = [];\n\n      }\n\n      if (geometries[geometry.uuid] === undefined) {\n\n        var json = geometry.toJSON();\n\n        delete json.metadata;\n\n        geometries[geometry.uuid] = json;\n\n        output.geometries.push(json);\n\n      }\n\n      return geometry.uuid;\n\n    };\n\n    //\n\n    var materials = {};\n\n    var parseMaterial = function parseMaterial(material) {\n\n      if (output.materials === undefined) {\n\n        output.materials = [];\n\n      }\n\n      if (materials[material.uuid] === undefined) {\n\n        var json = material.toJSON();\n\n        delete json.metadata;\n\n        materials[material.uuid] = json;\n\n        output.materials.push(json);\n\n      }\n\n      return material.uuid;\n\n    };\n\n    //\n\n    var parseObject = function parseObject(object) {\n\n      var data = {};\n\n      data.uuid = object.uuid;\n      data.type = object.type;\n\n      if (object.name !== '') data.name = object.name;\n      if (JSON.stringify(object.userData) !== '{}') data.userData = object.userData;\n      if (object.visible !== true) data.visible = object.visible;\n\n      if (object instanceof THREE.PerspectiveCamera) {\n\n        data.fov = object.fov;\n        data.aspect = object.aspect;\n        data.near = object.near;\n        data.far = object.far;\n\n      } else if (object instanceof THREE.OrthographicCamera) {\n\n        data.left = object.left;\n        data.right = object.right;\n        data.top = object.top;\n        data.bottom = object.bottom;\n        data.near = object.near;\n        data.far = object.far;\n\n      } else if (object instanceof THREE.AmbientLight) {\n\n        data.color = object.color.getHex();\n\n      } else if (object instanceof THREE.DirectionalLight) {\n\n        data.color = object.color.getHex();\n        data.intensity = object.intensity;\n\n      } else if (object instanceof THREE.PointLight) {\n\n        data.color = object.color.getHex();\n        data.intensity = object.intensity;\n        data.distance = object.distance;\n        data.decay = object.decay;\n\n      } else if (object instanceof THREE.SpotLight) {\n\n        data.color = object.color.getHex();\n        data.intensity = object.intensity;\n        data.distance = object.distance;\n        data.angle = object.angle;\n        data.exponent = object.exponent;\n        data.decay = object.decay;\n\n      } else if (object instanceof THREE.HemisphereLight) {\n\n        data.color = object.color.getHex();\n        data.groundColor = object.groundColor.getHex();\n\n      } else if (object instanceof THREE.Mesh || object instanceof THREE.Line || object instanceof THREE.PointCloud) {\n\n        data.geometry = parseGeometry(object.geometry);\n        data.material = parseMaterial(object.material);\n\n        if (object instanceof THREE.Line) data.mode = object.mode;\n\n      } else if (object instanceof THREE.Sprite) {\n\n        data.material = parseMaterial(object.material);\n\n      }\n\n      data.matrix = object.matrix.toArray();\n\n      if (object.children.length > 0) {\n\n        data.children = [];\n\n        for (var i = 0; i < object.children.length; i++) {\n\n          data.children.push(parseObject(object.children[i]));\n\n        }\n\n      }\n\n      return data;\n\n    };\n\n    output.object = parseObject(this);\n\n    return output;\n\n  },\n\n  clone: function clone(object, recursive) {\n\n    if (object === undefined) object = new THREE.Object3D();\n    if (recursive === undefined) recursive = true;\n\n    object.name = this.name;\n\n    object.up.copy(this.up);\n\n    object.position.copy(this.position);\n    object.quaternion.copy(this.quaternion);\n    object.scale.copy(this.scale);\n\n    object.rotationAutoUpdate = this.rotationAutoUpdate;\n\n    object.matrix.copy(this.matrix);\n    object.matrixWorld.copy(this.matrixWorld);\n\n    object.matrixAutoUpdate = this.matrixAutoUpdate;\n    object.matrixWorldNeedsUpdate = this.matrixWorldNeedsUpdate;\n\n    object.visible = this.visible;\n\n    object.castShadow = this.castShadow;\n    object.receiveShadow = this.receiveShadow;\n\n    object.frustumCulled = this.frustumCulled;\n\n    object.userData = JSON.parse(JSON.stringify(this.userData));\n\n    if (recursive === true) {\n\n      for (var i = 0; i < this.children.length; i++) {\n\n        var child = this.children[i];\n        object.add(child.clone());\n\n      }\n\n    }\n\n    return object;\n\n  } };\n\n\n\nTHREE.EventDispatcher.prototype.apply(THREE.Object3D.prototype);\n\nTHREE.Object3DIdCount = 0;\n\n// File:src/core/Face3.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.Face3 = function (a, b, c, normal, color, materialIndex) {\n\n  this.a = a;\n  this.b = b;\n  this.c = c;\n\n  this.normal = normal instanceof THREE.Vector3 ? normal : new THREE.Vector3();\n  this.vertexNormals = normal instanceof Array ? normal : [];\n\n  this.color = color instanceof THREE.Color ? color : new THREE.Color();\n  this.vertexColors = color instanceof Array ? color : [];\n\n  this.vertexTangents = [];\n\n  this.materialIndex = materialIndex !== undefined ? materialIndex : 0;\n\n};\n\nTHREE.Face3.prototype = {\n\n  constructor: THREE.Face3,\n\n  clone: function clone() {\n\n    var face = new THREE.Face3(this.a, this.b, this.c);\n\n    face.normal.copy(this.normal);\n    face.color.copy(this.color);\n\n    face.materialIndex = this.materialIndex;\n\n    for (var i = 0, il = this.vertexNormals.length; i < il; i++) {\n\n      face.vertexNormals[i] = this.vertexNormals[i].clone();\n\n    }\n\n    for (var i = 0, il = this.vertexColors.length; i < il; i++) {\n\n      face.vertexColors[i] = this.vertexColors[i].clone();\n\n    }\n\n    for (var i = 0, il = this.vertexTangents.length; i < il; i++) {\n\n      face.vertexTangents[i] = this.vertexTangents[i].clone();\n\n    }\n\n    return face;\n\n  } };\n\n\n\n// File:src/core/Face4.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.Face4 = function (a, b, c, d, normal, color, materialIndex) {\n\n  THREE.warn('THREE.Face4 has been removed. A THREE.Face3 will be created instead.');\n  return new THREE.Face3(a, b, c, normal, color, materialIndex);\n\n};\n\n// File:src/core/BufferAttribute.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.BufferAttribute = function (array, itemSize) {\n\n  this.array = array;\n  this.itemSize = itemSize;\n\n  this.needsUpdate = false;\n\n};\n\nTHREE.BufferAttribute.prototype = {\n\n  constructor: THREE.BufferAttribute,\n\n  get length() {\n\n    return this.array.length;\n\n  },\n\n  copyAt: function copyAt(index1, attribute, index2) {\n\n    index1 *= this.itemSize;\n    index2 *= attribute.itemSize;\n\n    for (var i = 0, l = this.itemSize; i < l; i++) {\n\n      this.array[index1 + i] = attribute.array[index2 + i];\n\n    }\n\n    return this;\n\n  },\n\n  set: function set(value, offset) {\n\n    if (offset === undefined) offset = 0;\n\n    this.array.set(value, offset);\n\n    return this;\n\n  },\n\n  setX: function setX(index, x) {\n\n    this.array[index * this.itemSize] = x;\n\n    return this;\n\n  },\n\n  setY: function setY(index, y) {\n\n    this.array[index * this.itemSize + 1] = y;\n\n    return this;\n\n  },\n\n  setZ: function setZ(index, z) {\n\n    this.array[index * this.itemSize + 2] = z;\n\n    return this;\n\n  },\n\n  setXY: function setXY(index, x, y) {\n\n    index *= this.itemSize;\n\n    this.array[index] = x;\n    this.array[index + 1] = y;\n\n    return this;\n\n  },\n\n  setXYZ: function setXYZ(index, x, y, z) {\n\n    index *= this.itemSize;\n\n    this.array[index] = x;\n    this.array[index + 1] = y;\n    this.array[index + 2] = z;\n\n    return this;\n\n  },\n\n  setXYZW: function setXYZW(index, x, y, z, w) {\n\n    index *= this.itemSize;\n\n    this.array[index] = x;\n    this.array[index + 1] = y;\n    this.array[index + 2] = z;\n    this.array[index + 3] = w;\n\n    return this;\n\n  },\n\n  clone: function clone() {\n\n    return new THREE.BufferAttribute(new this.array.constructor(this.array), this.itemSize);\n\n  } };\n\n\n\n//\n\nTHREE.Int8Attribute = function (data, itemSize) {\n\n  THREE.warn('THREE.Int8Attribute has been removed. Use THREE.BufferAttribute( array, itemSize ) instead.');\n  return new THREE.BufferAttribute(data, itemSize);\n\n};\n\nTHREE.Uint8Attribute = function (data, itemSize) {\n\n  THREE.warn('THREE.Uint8Attribute has been removed. Use THREE.BufferAttribute( array, itemSize ) instead.');\n  return new THREE.BufferAttribute(data, itemSize);\n\n};\n\nTHREE.Uint8ClampedAttribute = function (data, itemSize) {\n\n  THREE.warn('THREE.Uint8ClampedAttribute has been removed. Use THREE.BufferAttribute( array, itemSize ) instead.');\n  return new THREE.BufferAttribute(data, itemSize);\n\n\n};\n\nTHREE.Int16Attribute = function (data, itemSize) {\n\n  THREE.warn('THREE.Int16Attribute has been removed. Use THREE.BufferAttribute( array, itemSize ) instead.');\n  return new THREE.BufferAttribute(data, itemSize);\n\n};\n\nTHREE.Uint16Attribute = function (data, itemSize) {\n\n  THREE.warn('THREE.Uint16Attribute has been removed. Use THREE.BufferAttribute( array, itemSize ) instead.');\n  return new THREE.BufferAttribute(data, itemSize);\n\n};\n\nTHREE.Int32Attribute = function (data, itemSize) {\n\n  THREE.warn('THREE.Int32Attribute has been removed. Use THREE.BufferAttribute( array, itemSize ) instead.');\n  return new THREE.BufferAttribute(data, itemSize);\n\n};\n\nTHREE.Uint32Attribute = function (data, itemSize) {\n\n  THREE.warn('THREE.Uint32Attribute has been removed. Use THREE.BufferAttribute( array, itemSize ) instead.');\n  return new THREE.BufferAttribute(data, itemSize);\n\n};\n\nTHREE.Float32Attribute = function (data, itemSize) {\n\n  THREE.warn('THREE.Float32Attribute has been removed. Use THREE.BufferAttribute( array, itemSize ) instead.');\n  return new THREE.BufferAttribute(data, itemSize);\n\n};\n\nTHREE.Float64Attribute = function (data, itemSize) {\n\n  THREE.warn('THREE.Float64Attribute has been removed. Use THREE.BufferAttribute( array, itemSize ) instead.');\n  return new THREE.BufferAttribute(data, itemSize);\n\n};\n\n// File:src/core/DynamicBufferAttribute.js\n\n/**\n * @author benaadams / https://twitter.com/ben_a_adams\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.DynamicBufferAttribute = function (array, itemSize) {\n\n  THREE.BufferAttribute.call(this, array, itemSize);\n\n  this.updateRange = { offset: 0, count: -1 };\n\n};\n\nTHREE.DynamicBufferAttribute.prototype = Object.create(THREE.BufferAttribute.prototype);\nTHREE.DynamicBufferAttribute.prototype.constructor = THREE.DynamicBufferAttribute;\n\nTHREE.DynamicBufferAttribute.prototype.clone = function () {\n\n  return new THREE.DynamicBufferAttribute(new this.array.constructor(this.array), this.itemSize);\n\n};\n\n// File:src/core/BufferGeometry.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.BufferGeometry = function () {\n\n  Object.defineProperty(this, 'id', { value: THREE.GeometryIdCount++ });\n\n  this.uuid = THREE.Math.generateUUID();\n\n  this.name = '';\n  this.type = 'BufferGeometry';\n\n  this.attributes = {};\n  this.attributesKeys = [];\n\n  this.drawcalls = [];\n  this.offsets = this.drawcalls; // backwards compatibility\n\n  this.boundingBox = null;\n  this.boundingSphere = null;\n\n};\n\nTHREE.BufferGeometry.prototype = {\n\n  constructor: THREE.BufferGeometry,\n\n  addAttribute: function addAttribute(name, attribute) {\n\n    if (attribute instanceof THREE.BufferAttribute === false) {\n\n      THREE.warn('THREE.BufferGeometry: .addAttribute() now expects ( name, attribute ).');\n\n      this.attributes[name] = { array: arguments[1], itemSize: arguments[2] };\n\n      return;\n\n    }\n\n    this.attributes[name] = attribute;\n    this.attributesKeys = Object.keys(this.attributes);\n\n  },\n\n  getAttribute: function getAttribute(name) {\n\n    return this.attributes[name];\n\n  },\n\n  addDrawCall: function addDrawCall(start, count, indexOffset) {\n\n    this.drawcalls.push({\n\n      start: start,\n      count: count,\n      index: indexOffset !== undefined ? indexOffset : 0 });\n\n\n\n  },\n\n  applyMatrix: function applyMatrix(matrix) {\n\n    var position = this.attributes.position;\n\n    if (position !== undefined) {\n\n      matrix.applyToVector3Array(position.array);\n      position.needsUpdate = true;\n\n    }\n\n    var normal = this.attributes.normal;\n\n    if (normal !== undefined) {\n\n      var normalMatrix = new THREE.Matrix3().getNormalMatrix(matrix);\n\n      normalMatrix.applyToVector3Array(normal.array);\n      normal.needsUpdate = true;\n\n    }\n\n    if (this.boundingBox !== null) {\n\n      this.computeBoundingBox();\n\n    }\n\n    if (this.boundingSphere !== null) {\n\n      this.computeBoundingSphere();\n\n    }\n\n  },\n\n  center: function center() {\n\n    this.computeBoundingBox();\n\n    var offset = this.boundingBox.center().negate();\n\n    this.applyMatrix(new THREE.Matrix4().setPosition(offset));\n\n    return offset;\n\n  },\n\n  fromGeometry: function fromGeometry(geometry, settings) {\n\n    settings = settings || { 'vertexColors': THREE.NoColors };\n\n    var vertices = geometry.vertices;\n    var faces = geometry.faces;\n    var faceVertexUvs = geometry.faceVertexUvs;\n    var vertexColors = settings.vertexColors;\n    var hasFaceVertexUv = faceVertexUvs[0].length > 0;\n    var hasFaceVertexNormals = faces[0].vertexNormals.length == 3;\n\n    var positions = new Float32Array(faces.length * 3 * 3);\n    this.addAttribute('position', new THREE.BufferAttribute(positions, 3));\n\n    var normals = new Float32Array(faces.length * 3 * 3);\n    this.addAttribute('normal', new THREE.BufferAttribute(normals, 3));\n\n    if (vertexColors !== THREE.NoColors) {\n\n      var colors = new Float32Array(faces.length * 3 * 3);\n      this.addAttribute('color', new THREE.BufferAttribute(colors, 3));\n\n    }\n\n    if (hasFaceVertexUv === true) {\n\n      var uvs = new Float32Array(faces.length * 3 * 2);\n      this.addAttribute('uv', new THREE.BufferAttribute(uvs, 2));\n\n    }\n\n    for (var i = 0, i2 = 0, i3 = 0; i < faces.length; i++, i2 += 6, i3 += 9) {\n\n      var face = faces[i];\n\n      var a = vertices[face.a];\n      var b = vertices[face.b];\n      var c = vertices[face.c];\n\n      positions[i3] = a.x;\n      positions[i3 + 1] = a.y;\n      positions[i3 + 2] = a.z;\n\n      positions[i3 + 3] = b.x;\n      positions[i3 + 4] = b.y;\n      positions[i3 + 5] = b.z;\n\n      positions[i3 + 6] = c.x;\n      positions[i3 + 7] = c.y;\n      positions[i3 + 8] = c.z;\n\n      if (hasFaceVertexNormals === true) {\n\n        var na = face.vertexNormals[0];\n        var nb = face.vertexNormals[1];\n        var nc = face.vertexNormals[2];\n\n        normals[i3] = na.x;\n        normals[i3 + 1] = na.y;\n        normals[i3 + 2] = na.z;\n\n        normals[i3 + 3] = nb.x;\n        normals[i3 + 4] = nb.y;\n        normals[i3 + 5] = nb.z;\n\n        normals[i3 + 6] = nc.x;\n        normals[i3 + 7] = nc.y;\n        normals[i3 + 8] = nc.z;\n\n      } else {\n\n        var n = face.normal;\n\n        normals[i3] = n.x;\n        normals[i3 + 1] = n.y;\n        normals[i3 + 2] = n.z;\n\n        normals[i3 + 3] = n.x;\n        normals[i3 + 4] = n.y;\n        normals[i3 + 5] = n.z;\n\n        normals[i3 + 6] = n.x;\n        normals[i3 + 7] = n.y;\n        normals[i3 + 8] = n.z;\n\n      }\n\n      if (vertexColors === THREE.FaceColors) {\n\n        var fc = face.color;\n\n        colors[i3] = fc.r;\n        colors[i3 + 1] = fc.g;\n        colors[i3 + 2] = fc.b;\n\n        colors[i3 + 3] = fc.r;\n        colors[i3 + 4] = fc.g;\n        colors[i3 + 5] = fc.b;\n\n        colors[i3 + 6] = fc.r;\n        colors[i3 + 7] = fc.g;\n        colors[i3 + 8] = fc.b;\n\n      } else if (vertexColors === THREE.VertexColors) {\n\n        var vca = face.vertexColors[0];\n        var vcb = face.vertexColors[1];\n        var vcc = face.vertexColors[2];\n\n        colors[i3] = vca.r;\n        colors[i3 + 1] = vca.g;\n        colors[i3 + 2] = vca.b;\n\n        colors[i3 + 3] = vcb.r;\n        colors[i3 + 4] = vcb.g;\n        colors[i3 + 5] = vcb.b;\n\n        colors[i3 + 6] = vcc.r;\n        colors[i3 + 7] = vcc.g;\n        colors[i3 + 8] = vcc.b;\n\n      }\n\n      if (hasFaceVertexUv === true) {\n\n        var uva = faceVertexUvs[0][i][0];\n        var uvb = faceVertexUvs[0][i][1];\n        var uvc = faceVertexUvs[0][i][2];\n\n        uvs[i2] = uva.x;\n        uvs[i2 + 1] = uva.y;\n\n        uvs[i2 + 2] = uvb.x;\n        uvs[i2 + 3] = uvb.y;\n\n        uvs[i2 + 4] = uvc.x;\n        uvs[i2 + 5] = uvc.y;\n\n      }\n\n    }\n\n    this.computeBoundingSphere();\n\n    return this;\n\n  },\n\n  computeBoundingBox: function () {\n\n    var vector = new THREE.Vector3();\n\n    return function () {\n\n      if (this.boundingBox === null) {\n\n        this.boundingBox = new THREE.Box3();\n\n      }\n\n      var positions = this.attributes.position.array;\n\n      if (positions) {\n\n        var bb = this.boundingBox;\n        bb.makeEmpty();\n\n        for (var i = 0, il = positions.length; i < il; i += 3) {\n\n          vector.set(positions[i], positions[i + 1], positions[i + 2]);\n          bb.expandByPoint(vector);\n\n        }\n\n      }\n\n      if (positions === undefined || positions.length === 0) {\n\n        this.boundingBox.min.set(0, 0, 0);\n        this.boundingBox.max.set(0, 0, 0);\n\n      }\n\n      if (isNaN(this.boundingBox.min.x) || isNaN(this.boundingBox.min.y) || isNaN(this.boundingBox.min.z)) {\n\n        THREE.error('THREE.BufferGeometry.computeBoundingBox: Computed min/max have NaN values. The \"position\" attribute is likely to have NaN values.');\n\n      }\n\n    };\n\n  }(),\n\n  computeBoundingSphere: function () {\n\n    var box = new THREE.Box3();\n    var vector = new THREE.Vector3();\n\n    return function () {\n\n      if (this.boundingSphere === null) {\n\n        this.boundingSphere = new THREE.Sphere();\n\n      }\n\n      var positions = this.attributes.position.array;\n\n      if (positions) {\n\n        box.makeEmpty();\n\n        var center = this.boundingSphere.center;\n\n        for (var i = 0, il = positions.length; i < il; i += 3) {\n\n          vector.set(positions[i], positions[i + 1], positions[i + 2]);\n          box.expandByPoint(vector);\n\n        }\n\n        box.center(center);\n\n        // hoping to find a boundingSphere with a radius smaller than the\n        // boundingSphere of the boundingBox:  sqrt(3) smaller in the best case\n\n        var maxRadiusSq = 0;\n\n        for (var i = 0, il = positions.length; i < il; i += 3) {\n\n          vector.set(positions[i], positions[i + 1], positions[i + 2]);\n          maxRadiusSq = Math.max(maxRadiusSq, center.distanceToSquared(vector));\n\n        }\n\n        this.boundingSphere.radius = Math.sqrt(maxRadiusSq);\n\n        if (isNaN(this.boundingSphere.radius)) {\n\n          THREE.error('THREE.BufferGeometry.computeBoundingSphere(): Computed radius is NaN. The \"position\" attribute is likely to have NaN values.');\n\n        }\n\n      }\n\n    };\n\n  }(),\n\n  computeFaceNormals: function computeFaceNormals() {\n\n    // backwards compatibility\n\n  },\n\n  computeVertexNormals: function computeVertexNormals() {\n\n    var attributes = this.attributes;\n\n    if (attributes.position) {\n\n      var positions = attributes.position.array;\n\n      if (attributes.normal === undefined) {\n\n        this.addAttribute('normal', new THREE.BufferAttribute(new Float32Array(positions.length), 3));\n\n      } else {\n\n        // reset existing normals to zero\n\n        var normals = attributes.normal.array;\n\n        for (var i = 0, il = normals.length; i < il; i++) {\n\n          normals[i] = 0;\n\n        }\n\n      }\n\n      var normals = attributes.normal.array;\n\n      var vA,vB,vC,\n\n      pA = new THREE.Vector3(),\n      pB = new THREE.Vector3(),\n      pC = new THREE.Vector3(),\n\n      cb = new THREE.Vector3(),\n      ab = new THREE.Vector3();\n\n      // indexed elements\n\n      if (attributes.index) {\n\n        var indices = attributes.index.array;\n\n        var offsets = this.offsets.length > 0 ? this.offsets : [{ start: 0, count: indices.length, index: 0 }];\n\n        for (var j = 0, jl = offsets.length; j < jl; ++j) {\n\n          var start = offsets[j].start;\n          var count = offsets[j].count;\n          var index = offsets[j].index;\n\n          for (var i = start, il = start + count; i < il; i += 3) {\n\n            vA = (index + indices[i]) * 3;\n            vB = (index + indices[i + 1]) * 3;\n            vC = (index + indices[i + 2]) * 3;\n\n            pA.fromArray(positions, vA);\n            pB.fromArray(positions, vB);\n            pC.fromArray(positions, vC);\n\n            cb.subVectors(pC, pB);\n            ab.subVectors(pA, pB);\n            cb.cross(ab);\n\n            normals[vA] += cb.x;\n            normals[vA + 1] += cb.y;\n            normals[vA + 2] += cb.z;\n\n            normals[vB] += cb.x;\n            normals[vB + 1] += cb.y;\n            normals[vB + 2] += cb.z;\n\n            normals[vC] += cb.x;\n            normals[vC + 1] += cb.y;\n            normals[vC + 2] += cb.z;\n\n          }\n\n        }\n\n      } else {\n\n        // non-indexed elements (unconnected triangle soup)\n\n        for (var i = 0, il = positions.length; i < il; i += 9) {\n\n          pA.fromArray(positions, i);\n          pB.fromArray(positions, i + 3);\n          pC.fromArray(positions, i + 6);\n\n          cb.subVectors(pC, pB);\n          ab.subVectors(pA, pB);\n          cb.cross(ab);\n\n          normals[i] = cb.x;\n          normals[i + 1] = cb.y;\n          normals[i + 2] = cb.z;\n\n          normals[i + 3] = cb.x;\n          normals[i + 4] = cb.y;\n          normals[i + 5] = cb.z;\n\n          normals[i + 6] = cb.x;\n          normals[i + 7] = cb.y;\n          normals[i + 8] = cb.z;\n\n        }\n\n      }\n\n      this.normalizeNormals();\n\n      attributes.normal.needsUpdate = true;\n\n    }\n\n  },\n\n  computeTangents: function computeTangents() {\n\n    // based on http://www.terathon.com/code/tangent.html\n    // (per vertex tangents)\n\n    if (this.attributes.index === undefined ||\n    this.attributes.position === undefined ||\n    this.attributes.normal === undefined ||\n    this.attributes.uv === undefined) {\n\n      THREE.warn('THREE.BufferGeometry: Missing required attributes (index, position, normal or uv) in BufferGeometry.computeTangents()');\n      return;\n\n    }\n\n    var indices = this.attributes.index.array;\n    var positions = this.attributes.position.array;\n    var normals = this.attributes.normal.array;\n    var uvs = this.attributes.uv.array;\n\n    var nVertices = positions.length / 3;\n\n    if (this.attributes.tangent === undefined) {\n\n      this.addAttribute('tangent', new THREE.BufferAttribute(new Float32Array(4 * nVertices), 4));\n\n    }\n\n    var tangents = this.attributes.tangent.array;\n\n    var tan1 = [],tan2 = [];\n\n    for (var k = 0; k < nVertices; k++) {\n\n      tan1[k] = new THREE.Vector3();\n      tan2[k] = new THREE.Vector3();\n\n    }\n\n    var vA = new THREE.Vector3(),\n    vB = new THREE.Vector3(),\n    vC = new THREE.Vector3(),\n\n    uvA = new THREE.Vector2(),\n    uvB = new THREE.Vector2(),\n    uvC = new THREE.Vector2(),\n\n    x1,x2,y1,y2,z1,z2,\n    s1,s2,t1,t2,r;\n\n    var sdir = new THREE.Vector3(),tdir = new THREE.Vector3();\n\n    function handleTriangle(a, b, c) {\n\n      vA.fromArray(positions, a * 3);\n      vB.fromArray(positions, b * 3);\n      vC.fromArray(positions, c * 3);\n\n      uvA.fromArray(uvs, a * 2);\n      uvB.fromArray(uvs, b * 2);\n      uvC.fromArray(uvs, c * 2);\n\n      x1 = vB.x - vA.x;\n      x2 = vC.x - vA.x;\n\n      y1 = vB.y - vA.y;\n      y2 = vC.y - vA.y;\n\n      z1 = vB.z - vA.z;\n      z2 = vC.z - vA.z;\n\n      s1 = uvB.x - uvA.x;\n      s2 = uvC.x - uvA.x;\n\n      t1 = uvB.y - uvA.y;\n      t2 = uvC.y - uvA.y;\n\n      r = 1.0 / (s1 * t2 - s2 * t1);\n\n      sdir.set(\n      (t2 * x1 - t1 * x2) * r,\n      (t2 * y1 - t1 * y2) * r,\n      (t2 * z1 - t1 * z2) * r);\n\n\n      tdir.set(\n      (s1 * x2 - s2 * x1) * r,\n      (s1 * y2 - s2 * y1) * r,\n      (s1 * z2 - s2 * z1) * r);\n\n\n      tan1[a].add(sdir);\n      tan1[b].add(sdir);\n      tan1[c].add(sdir);\n\n      tan2[a].add(tdir);\n      tan2[b].add(tdir);\n      tan2[c].add(tdir);\n\n    }\n\n    var i, il;\n    var j, jl;\n    var iA, iB, iC;\n\n    if (this.drawcalls.length === 0) {\n\n      this.addDrawCall(0, indices.length, 0);\n\n    }\n\n    var drawcalls = this.drawcalls;\n\n    for (j = 0, jl = drawcalls.length; j < jl; ++j) {\n\n      var start = drawcalls[j].start;\n      var count = drawcalls[j].count;\n      var index = drawcalls[j].index;\n\n      for (i = start, il = start + count; i < il; i += 3) {\n\n        iA = index + indices[i];\n        iB = index + indices[i + 1];\n        iC = index + indices[i + 2];\n\n        handleTriangle(iA, iB, iC);\n\n      }\n\n    }\n\n    var tmp = new THREE.Vector3(),tmp2 = new THREE.Vector3();\n    var n = new THREE.Vector3(),n2 = new THREE.Vector3();\n    var w, t, test;\n\n    function handleVertex(v) {\n\n      n.fromArray(normals, v * 3);\n      n2.copy(n);\n\n      t = tan1[v];\n\n      // Gram-Schmidt orthogonalize\n\n      tmp.copy(t);\n      tmp.sub(n.multiplyScalar(n.dot(t))).normalize();\n\n      // Calculate handedness\n\n      tmp2.crossVectors(n2, t);\n      test = tmp2.dot(tan2[v]);\n      w = test < 0.0 ? -1.0 : 1.0;\n\n      tangents[v * 4] = tmp.x;\n      tangents[v * 4 + 1] = tmp.y;\n      tangents[v * 4 + 2] = tmp.z;\n      tangents[v * 4 + 3] = w;\n\n    }\n\n    for (j = 0, jl = drawcalls.length; j < jl; ++j) {\n\n      var start = drawcalls[j].start;\n      var count = drawcalls[j].count;\n      var index = drawcalls[j].index;\n\n      for (i = start, il = start + count; i < il; i += 3) {\n\n        iA = index + indices[i];\n        iB = index + indices[i + 1];\n        iC = index + indices[i + 2];\n\n        handleVertex(iA);\n        handleVertex(iB);\n        handleVertex(iC);\n\n      }\n\n    }\n\n  },\n\n  /*\n     Compute the draw offset for large models by chunking the index buffer into chunks of 65k addressable vertices.\n     This method will effectively rewrite the index buffer and remap all attributes to match the new indices.\n     WARNING: This method will also expand the vertex count to prevent sprawled triangles across draw offsets.\n     size - Defaults to 65535, but allows for larger or smaller chunks.\n     */\n  computeOffsets: function computeOffsets(size) {\n\n    if (size === undefined) size = 65535; // WebGL limits type of index buffer values to 16-bit.\n\n    var indices = this.attributes.index.array;\n    var vertices = this.attributes.position.array;\n\n    var facesCount = indices.length / 3;\n\n    /*\n                                         console.log(\"Computing buffers in offsets of \"+size+\" -> indices:\"+indices.length+\" vertices:\"+vertices.length);\n                                         console.log(\"Faces to process: \"+(indices.length/3));\n                                         console.log(\"Reordering \"+verticesCount+\" vertices.\");\n                                         */\n\n    var sortedIndices = new Uint16Array(indices.length); //16-bit buffers\n    var indexPtr = 0;\n    var vertexPtr = 0;\n\n    var offsets = [{ start: 0, count: 0, index: 0 }];\n    var offset = offsets[0];\n\n    var duplicatedVertices = 0;\n    var newVerticeMaps = 0;\n    var faceVertices = new Int32Array(6);\n    var vertexMap = new Int32Array(vertices.length);\n    var revVertexMap = new Int32Array(vertices.length);\n    for (var j = 0; j < vertices.length; j++) {vertexMap[j] = -1;revVertexMap[j] = -1;}\n\n    /*\n                                                                                        \tTraverse every face and reorder vertices in the proper offsets of 65k.\n                                                                                        \tWe can have more than 65k entries in the index buffer per offset, but only reference 65k values.\n                                                                                        */\n    for (var findex = 0; findex < facesCount; findex++) {\n      newVerticeMaps = 0;\n\n      for (var vo = 0; vo < 3; vo++) {\n        var vid = indices[findex * 3 + vo];\n        if (vertexMap[vid] == -1) {\n          //Unmapped vertice\n          faceVertices[vo * 2] = vid;\n          faceVertices[vo * 2 + 1] = -1;\n          newVerticeMaps++;\n        } else if (vertexMap[vid] < offset.index) {\n          //Reused vertices from previous block (duplicate)\n          faceVertices[vo * 2] = vid;\n          faceVertices[vo * 2 + 1] = -1;\n          duplicatedVertices++;\n        } else {\n          //Reused vertice in the current block\n          faceVertices[vo * 2] = vid;\n          faceVertices[vo * 2 + 1] = vertexMap[vid];\n        }\n      }\n\n      var faceMax = vertexPtr + newVerticeMaps;\n      if (faceMax > offset.index + size) {\n        var new_offset = { start: indexPtr, count: 0, index: vertexPtr };\n        offsets.push(new_offset);\n        offset = new_offset;\n\n        //Re-evaluate reused vertices in light of new offset.\n        for (var v = 0; v < 6; v += 2) {\n          var new_vid = faceVertices[v + 1];\n          if (new_vid > -1 && new_vid < offset.index)\n          faceVertices[v + 1] = -1;\n        }\n      }\n\n      //Reindex the face.\n      for (var v = 0; v < 6; v += 2) {\n        var vid = faceVertices[v];\n        var new_vid = faceVertices[v + 1];\n\n        if (new_vid === -1)\n        new_vid = vertexPtr++;\n\n        vertexMap[vid] = new_vid;\n        revVertexMap[new_vid] = vid;\n        sortedIndices[indexPtr++] = new_vid - offset.index; //XXX overflows at 16bit\n        offset.count++;\n      }\n    }\n\n    /* Move all attribute values to map to the new computed indices , also expand the vertice stack to match our new vertexPtr. */\n    this.reorderBuffers(sortedIndices, revVertexMap, vertexPtr);\n    this.offsets = offsets; // TODO: Deprecate\n    this.drawcalls = offsets;\n\n    /*\n                              var orderTime = Date.now();\n                              console.log(\"Reorder time: \"+(orderTime-s)+\"ms\");\n                              console.log(\"Duplicated \"+duplicatedVertices+\" vertices.\");\n                              console.log(\"Compute Buffers time: \"+(Date.now()-s)+\"ms\");\n                              console.log(\"Draw offsets: \"+offsets.length);\n                              */\n\n    return offsets;\n\n  },\n\n  merge: function merge(geometry, offset) {\n\n    if (geometry instanceof THREE.BufferGeometry === false) {\n\n      THREE.error('THREE.BufferGeometry.merge(): geometry not an instance of THREE.BufferGeometry.', geometry);\n      return;\n\n    }\n\n    if (offset === undefined) offset = 0;\n\n    var attributes = this.attributes;\n\n    for (var key in attributes) {\n\n      if (geometry.attributes[key] === undefined) continue;\n\n      var attribute1 = attributes[key];\n      var attributeArray1 = attribute1.array;\n\n      var attribute2 = geometry.attributes[key];\n      var attributeArray2 = attribute2.array;\n\n      var attributeSize = attribute2.itemSize;\n\n      for (var i = 0, j = attributeSize * offset; i < attributeArray2.length; i++, j++) {\n\n        attributeArray1[j] = attributeArray2[i];\n\n      }\n\n    }\n\n    return this;\n\n  },\n\n  normalizeNormals: function normalizeNormals() {\n\n    var normals = this.attributes.normal.array;\n\n    var x, y, z, n;\n\n    for (var i = 0, il = normals.length; i < il; i += 3) {\n\n      x = normals[i];\n      y = normals[i + 1];\n      z = normals[i + 2];\n\n      n = 1.0 / Math.sqrt(x * x + y * y + z * z);\n\n      normals[i] *= n;\n      normals[i + 1] *= n;\n      normals[i + 2] *= n;\n\n    }\n\n  },\n\n  /*\n     \treoderBuffers:\n     \tReorder attributes based on a new indexBuffer and indexMap.\n     \tindexBuffer - Uint16Array of the new ordered indices.\n     \tindexMap - Int32Array where the position is the new vertex ID and the value the old vertex ID for each vertex.\n     \tvertexCount - Amount of total vertices considered in this reordering (in case you want to grow the vertice stack).\n     */\n  reorderBuffers: function reorderBuffers(indexBuffer, indexMap, vertexCount) {\n\n    /* Create a copy of all attributes for reordering. */\n    var sortedAttributes = {};\n    for (var attr in this.attributes) {\n      if (attr == 'index')\n      continue;\n      var sourceArray = this.attributes[attr].array;\n      sortedAttributes[attr] = new sourceArray.constructor(this.attributes[attr].itemSize * vertexCount);\n    }\n\n    /* Move attribute positions based on the new index map */\n    for (var new_vid = 0; new_vid < vertexCount; new_vid++) {\n      var vid = indexMap[new_vid];\n      for (var attr in this.attributes) {\n        if (attr == 'index')\n        continue;\n        var attrArray = this.attributes[attr].array;\n        var attrSize = this.attributes[attr].itemSize;\n        var sortedAttr = sortedAttributes[attr];\n        for (var k = 0; k < attrSize; k++) {\n          sortedAttr[new_vid * attrSize + k] = attrArray[vid * attrSize + k];}\n      }\n    }\n\n    /* Carry the new sorted buffers locally */\n    this.attributes['index'].array = indexBuffer;\n    for (var attr in this.attributes) {\n      if (attr == 'index')\n      continue;\n      this.attributes[attr].array = sortedAttributes[attr];\n      this.attributes[attr].numItems = this.attributes[attr].itemSize * vertexCount;\n    }\n  },\n\n  toJSON: function toJSON() {\n\n    var output = {\n      metadata: {\n        version: 4.0,\n        type: 'BufferGeometry',\n        generator: 'BufferGeometryExporter' },\n\n      uuid: this.uuid,\n      type: this.type,\n      data: {\n        attributes: {} } };\n\n\n\n    var attributes = this.attributes;\n    var offsets = this.offsets;\n    var boundingSphere = this.boundingSphere;\n\n    for (var key in attributes) {\n\n      var attribute = attributes[key];\n\n      var array = Array.prototype.slice.call(attribute.array);\n\n      output.data.attributes[key] = {\n        itemSize: attribute.itemSize,\n        type: attribute.array.constructor.name,\n        array: array };\n\n\n    }\n\n    if (offsets.length > 0) {\n\n      output.data.offsets = JSON.parse(JSON.stringify(offsets));\n\n    }\n\n    if (boundingSphere !== null) {\n\n      output.data.boundingSphere = {\n        center: boundingSphere.center.toArray(),\n        radius: boundingSphere.radius };\n\n\n    }\n\n    return output;\n\n  },\n\n  clone: function clone() {\n\n    var geometry = new THREE.BufferGeometry();\n\n    for (var attr in this.attributes) {\n\n      var sourceAttr = this.attributes[attr];\n      geometry.addAttribute(attr, sourceAttr.clone());\n\n    }\n\n    for (var i = 0, il = this.offsets.length; i < il; i++) {\n\n      var offset = this.offsets[i];\n\n      geometry.offsets.push({\n\n        start: offset.start,\n        index: offset.index,\n        count: offset.count });\n\n\n\n    }\n\n    return geometry;\n\n  },\n\n  dispose: function dispose() {\n\n    this.dispatchEvent({ type: 'dispose' });\n\n  } };\n\n\n\nTHREE.EventDispatcher.prototype.apply(THREE.BufferGeometry.prototype);\n\n// File:src/core/Geometry.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author kile / http://kile.stravaganza.org/\n * @author alteredq / http://alteredqualia.com/\n * @author mikael emtinger / http://gomo.se/\n * @author zz85 / http://www.lab4games.net/zz85/blog\n * @author bhouston / http://exocortex.com\n */\n\nTHREE.Geometry = function () {\n\n  Object.defineProperty(this, 'id', { value: THREE.GeometryIdCount++ });\n\n  this.uuid = THREE.Math.generateUUID();\n\n  this.name = '';\n  this.type = 'Geometry';\n\n  this.vertices = [];\n  this.colors = []; // one-to-one vertex colors, used in Points and Line\n\n  this.faces = [];\n\n  this.faceVertexUvs = [[]];\n\n  this.morphTargets = [];\n  this.morphColors = [];\n  this.morphNormals = [];\n\n  this.skinWeights = [];\n  this.skinIndices = [];\n\n  this.lineDistances = [];\n\n  this.boundingBox = null;\n  this.boundingSphere = null;\n\n  this.hasTangents = false;\n\n  this.dynamic = true; // the intermediate typed arrays will be deleted when set to false\n\n  // update flags\n\n  this.verticesNeedUpdate = false;\n  this.elementsNeedUpdate = false;\n  this.uvsNeedUpdate = false;\n  this.normalsNeedUpdate = false;\n  this.tangentsNeedUpdate = false;\n  this.colorsNeedUpdate = false;\n  this.lineDistancesNeedUpdate = false;\n\n  this.groupsNeedUpdate = false;\n\n};\n\nTHREE.Geometry.prototype = {\n\n  constructor: THREE.Geometry,\n\n  applyMatrix: function applyMatrix(matrix) {\n\n    var normalMatrix = new THREE.Matrix3().getNormalMatrix(matrix);\n\n    for (var i = 0, il = this.vertices.length; i < il; i++) {\n\n      var vertex = this.vertices[i];\n      vertex.applyMatrix4(matrix);\n\n    }\n\n    for (var i = 0, il = this.faces.length; i < il; i++) {\n\n      var face = this.faces[i];\n      face.normal.applyMatrix3(normalMatrix).normalize();\n\n      for (var j = 0, jl = face.vertexNormals.length; j < jl; j++) {\n\n        face.vertexNormals[j].applyMatrix3(normalMatrix).normalize();\n\n      }\n\n    }\n\n    if (this.boundingBox !== null) {\n\n      this.computeBoundingBox();\n\n    }\n\n    if (this.boundingSphere !== null) {\n\n      this.computeBoundingSphere();\n\n    }\n\n    this.verticesNeedUpdate = true;\n    this.normalsNeedUpdate = true;\n\n  },\n\n  fromBufferGeometry: function fromBufferGeometry(geometry) {\n\n    var scope = this;\n\n    var attributes = geometry.attributes;\n\n    var vertices = attributes.position.array;\n    var indices = attributes.index !== undefined ? attributes.index.array : undefined;\n    var normals = attributes.normal !== undefined ? attributes.normal.array : undefined;\n    var colors = attributes.color !== undefined ? attributes.color.array : undefined;\n    var uvs = attributes.uv !== undefined ? attributes.uv.array : undefined;\n\n    var tempNormals = [];\n    var tempUVs = [];\n\n    for (var i = 0, j = 0; i < vertices.length; i += 3, j += 2) {\n\n      scope.vertices.push(new THREE.Vector3(vertices[i], vertices[i + 1], vertices[i + 2]));\n\n      if (normals !== undefined) {\n\n        tempNormals.push(new THREE.Vector3(normals[i], normals[i + 1], normals[i + 2]));\n\n      }\n\n      if (colors !== undefined) {\n\n        scope.colors.push(new THREE.Color(colors[i], colors[i + 1], colors[i + 2]));\n\n      }\n\n      if (uvs !== undefined) {\n\n        tempUVs.push(new THREE.Vector2(uvs[j], uvs[j + 1]));\n\n      }\n\n    }\n\n    var addFace = function addFace(a, b, c) {\n\n      var vertexNormals = normals !== undefined ? [tempNormals[a].clone(), tempNormals[b].clone(), tempNormals[c].clone()] : [];\n      var vertexColors = colors !== undefined ? [scope.colors[a].clone(), scope.colors[b].clone(), scope.colors[c].clone()] : [];\n\n      scope.faces.push(new THREE.Face3(a, b, c, vertexNormals, vertexColors));\n\n      if (uvs !== undefined) {\n\n        scope.faceVertexUvs[0].push([tempUVs[a].clone(), tempUVs[b].clone(), tempUVs[c].clone()]);\n\n      }\n\n    };\n\n    if (indices !== undefined) {\n\n      var drawcalls = geometry.drawcalls;\n\n      if (drawcalls.length > 0) {\n\n        for (var i = 0; i < drawcalls.length; i++) {\n\n          var drawcall = drawcalls[i];\n\n          var start = drawcall.start;\n          var count = drawcall.count;\n          var index = drawcall.index;\n\n          for (var j = start, jl = start + count; j < jl; j += 3) {\n\n            addFace(index + indices[j], index + indices[j + 1], index + indices[j + 2]);\n\n          }\n\n        }\n\n      } else {\n\n        for (var i = 0; i < indices.length; i += 3) {\n\n          addFace(indices[i], indices[i + 1], indices[i + 2]);\n\n        }\n\n      }\n\n    } else {\n\n      for (var i = 0; i < vertices.length / 3; i += 3) {\n\n        addFace(i, i + 1, i + 2);\n\n      }\n\n    }\n\n    this.computeFaceNormals();\n\n    if (geometry.boundingBox !== null) {\n\n      this.boundingBox = geometry.boundingBox.clone();\n\n    }\n\n    if (geometry.boundingSphere !== null) {\n\n      this.boundingSphere = geometry.boundingSphere.clone();\n\n    }\n\n    return this;\n\n  },\n\n  center: function center() {\n\n    this.computeBoundingBox();\n\n    var offset = this.boundingBox.center().negate();\n\n    this.applyMatrix(new THREE.Matrix4().setPosition(offset));\n\n    return offset;\n\n  },\n\n  computeFaceNormals: function computeFaceNormals() {\n\n    var cb = new THREE.Vector3(),ab = new THREE.Vector3();\n\n    for (var f = 0, fl = this.faces.length; f < fl; f++) {\n\n      var face = this.faces[f];\n\n      var vA = this.vertices[face.a];\n      var vB = this.vertices[face.b];\n      var vC = this.vertices[face.c];\n\n      cb.subVectors(vC, vB);\n      ab.subVectors(vA, vB);\n      cb.cross(ab);\n\n      cb.normalize();\n\n      face.normal.copy(cb);\n\n    }\n\n  },\n\n  computeVertexNormals: function computeVertexNormals(areaWeighted) {\n\n    var v, vl, f, fl, face, vertices;\n\n    vertices = new Array(this.vertices.length);\n\n    for (v = 0, vl = this.vertices.length; v < vl; v++) {\n\n      vertices[v] = new THREE.Vector3();\n\n    }\n\n    if (areaWeighted) {\n\n      // vertex normals weighted by triangle areas\n      // http://www.iquilezles.org/www/articles/normals/normals.htm\n\n      var vA, vB, vC;\n      var cb = new THREE.Vector3(),ab = new THREE.Vector3();\n\n      for (f = 0, fl = this.faces.length; f < fl; f++) {\n\n        face = this.faces[f];\n\n        vA = this.vertices[face.a];\n        vB = this.vertices[face.b];\n        vC = this.vertices[face.c];\n\n        cb.subVectors(vC, vB);\n        ab.subVectors(vA, vB);\n        cb.cross(ab);\n\n        vertices[face.a].add(cb);\n        vertices[face.b].add(cb);\n        vertices[face.c].add(cb);\n\n      }\n\n    } else {\n\n      for (f = 0, fl = this.faces.length; f < fl; f++) {\n\n        face = this.faces[f];\n\n        vertices[face.a].add(face.normal);\n        vertices[face.b].add(face.normal);\n        vertices[face.c].add(face.normal);\n\n      }\n\n    }\n\n    for (v = 0, vl = this.vertices.length; v < vl; v++) {\n\n      vertices[v].normalize();\n\n    }\n\n    for (f = 0, fl = this.faces.length; f < fl; f++) {\n\n      face = this.faces[f];\n\n      face.vertexNormals[0] = vertices[face.a].clone();\n      face.vertexNormals[1] = vertices[face.b].clone();\n      face.vertexNormals[2] = vertices[face.c].clone();\n\n    }\n\n  },\n\n  computeMorphNormals: function computeMorphNormals() {\n\n    var i, il, f, fl, face;\n\n    // save original normals\n    // - create temp variables on first access\n    //   otherwise just copy (for faster repeated calls)\n\n    for (f = 0, fl = this.faces.length; f < fl; f++) {\n\n      face = this.faces[f];\n\n      if (!face.__originalFaceNormal) {\n\n        face.__originalFaceNormal = face.normal.clone();\n\n      } else {\n\n        face.__originalFaceNormal.copy(face.normal);\n\n      }\n\n      if (!face.__originalVertexNormals) face.__originalVertexNormals = [];\n\n      for (i = 0, il = face.vertexNormals.length; i < il; i++) {\n\n        if (!face.__originalVertexNormals[i]) {\n\n          face.__originalVertexNormals[i] = face.vertexNormals[i].clone();\n\n        } else {\n\n          face.__originalVertexNormals[i].copy(face.vertexNormals[i]);\n\n        }\n\n      }\n\n    }\n\n    // use temp geometry to compute face and vertex normals for each morph\n\n    var tmpGeo = new THREE.Geometry();\n    tmpGeo.faces = this.faces;\n\n    for (i = 0, il = this.morphTargets.length; i < il; i++) {\n\n      // create on first access\n\n      if (!this.morphNormals[i]) {\n\n        this.morphNormals[i] = {};\n        this.morphNormals[i].faceNormals = [];\n        this.morphNormals[i].vertexNormals = [];\n\n        var dstNormalsFace = this.morphNormals[i].faceNormals;\n        var dstNormalsVertex = this.morphNormals[i].vertexNormals;\n\n        var faceNormal, vertexNormals;\n\n        for (f = 0, fl = this.faces.length; f < fl; f++) {\n\n          faceNormal = new THREE.Vector3();\n          vertexNormals = { a: new THREE.Vector3(), b: new THREE.Vector3(), c: new THREE.Vector3() };\n\n          dstNormalsFace.push(faceNormal);\n          dstNormalsVertex.push(vertexNormals);\n\n        }\n\n      }\n\n      var morphNormals = this.morphNormals[i];\n\n      // set vertices to morph target\n\n      tmpGeo.vertices = this.morphTargets[i].vertices;\n\n      // compute morph normals\n\n      tmpGeo.computeFaceNormals();\n      tmpGeo.computeVertexNormals();\n\n      // store morph normals\n\n      var faceNormal, vertexNormals;\n\n      for (f = 0, fl = this.faces.length; f < fl; f++) {\n\n        face = this.faces[f];\n\n        faceNormal = morphNormals.faceNormals[f];\n        vertexNormals = morphNormals.vertexNormals[f];\n\n        faceNormal.copy(face.normal);\n\n        vertexNormals.a.copy(face.vertexNormals[0]);\n        vertexNormals.b.copy(face.vertexNormals[1]);\n        vertexNormals.c.copy(face.vertexNormals[2]);\n\n      }\n\n    }\n\n    // restore original normals\n\n    for (f = 0, fl = this.faces.length; f < fl; f++) {\n\n      face = this.faces[f];\n\n      face.normal = face.__originalFaceNormal;\n      face.vertexNormals = face.__originalVertexNormals;\n\n    }\n\n  },\n\n  computeTangents: function computeTangents() {\n\n    // based on http://www.terathon.com/code/tangent.html\n    // tangents go to vertices\n\n    var f,fl,v,vl,i,vertexIndex,\n    face,uv,vA,vB,vC,uvA,uvB,uvC,\n    x1,x2,y1,y2,z1,z2,\n    s1,s2,t1,t2,r,t,test,\n    tan1 = [],tan2 = [],\n    sdir = new THREE.Vector3(),tdir = new THREE.Vector3(),\n    tmp = new THREE.Vector3(),tmp2 = new THREE.Vector3(),\n    n = new THREE.Vector3(),w;\n\n    for (v = 0, vl = this.vertices.length; v < vl; v++) {\n\n      tan1[v] = new THREE.Vector3();\n      tan2[v] = new THREE.Vector3();\n\n    }\n\n    function handleTriangle(context, a, b, c, ua, ub, uc) {\n\n      vA = context.vertices[a];\n      vB = context.vertices[b];\n      vC = context.vertices[c];\n\n      uvA = uv[ua];\n      uvB = uv[ub];\n      uvC = uv[uc];\n\n      x1 = vB.x - vA.x;\n      x2 = vC.x - vA.x;\n      y1 = vB.y - vA.y;\n      y2 = vC.y - vA.y;\n      z1 = vB.z - vA.z;\n      z2 = vC.z - vA.z;\n\n      s1 = uvB.x - uvA.x;\n      s2 = uvC.x - uvA.x;\n      t1 = uvB.y - uvA.y;\n      t2 = uvC.y - uvA.y;\n\n      r = 1.0 / (s1 * t2 - s2 * t1);\n      sdir.set((t2 * x1 - t1 * x2) * r,\n      (t2 * y1 - t1 * y2) * r,\n      (t2 * z1 - t1 * z2) * r);\n      tdir.set((s1 * x2 - s2 * x1) * r,\n      (s1 * y2 - s2 * y1) * r,\n      (s1 * z2 - s2 * z1) * r);\n\n      tan1[a].add(sdir);\n      tan1[b].add(sdir);\n      tan1[c].add(sdir);\n\n      tan2[a].add(tdir);\n      tan2[b].add(tdir);\n      tan2[c].add(tdir);\n\n    }\n\n    for (f = 0, fl = this.faces.length; f < fl; f++) {\n\n      face = this.faces[f];\n      uv = this.faceVertexUvs[0][f]; // use UV layer 0 for tangents\n\n      handleTriangle(this, face.a, face.b, face.c, 0, 1, 2);\n\n    }\n\n    var faceIndex = ['a', 'b', 'c', 'd'];\n\n    for (f = 0, fl = this.faces.length; f < fl; f++) {\n\n      face = this.faces[f];\n\n      for (i = 0; i < Math.min(face.vertexNormals.length, 3); i++) {\n\n        n.copy(face.vertexNormals[i]);\n\n        vertexIndex = face[faceIndex[i]];\n\n        t = tan1[vertexIndex];\n\n        // Gram-Schmidt orthogonalize\n\n        tmp.copy(t);\n        tmp.sub(n.multiplyScalar(n.dot(t))).normalize();\n\n        // Calculate handedness\n\n        tmp2.crossVectors(face.vertexNormals[i], t);\n        test = tmp2.dot(tan2[vertexIndex]);\n        w = test < 0.0 ? -1.0 : 1.0;\n\n        face.vertexTangents[i] = new THREE.Vector4(tmp.x, tmp.y, tmp.z, w);\n\n      }\n\n    }\n\n    this.hasTangents = true;\n\n  },\n\n  computeLineDistances: function computeLineDistances() {\n\n    var d = 0;\n    var vertices = this.vertices;\n\n    for (var i = 0, il = vertices.length; i < il; i++) {\n\n      if (i > 0) {\n\n        d += vertices[i].distanceTo(vertices[i - 1]);\n\n      }\n\n      this.lineDistances[i] = d;\n\n    }\n\n  },\n\n  computeBoundingBox: function computeBoundingBox() {\n\n    if (this.boundingBox === null) {\n\n      this.boundingBox = new THREE.Box3();\n\n    }\n\n    this.boundingBox.setFromPoints(this.vertices);\n\n  },\n\n  computeBoundingSphere: function computeBoundingSphere() {\n\n    if (this.boundingSphere === null) {\n\n      this.boundingSphere = new THREE.Sphere();\n\n    }\n\n    this.boundingSphere.setFromPoints(this.vertices);\n\n  },\n\n  merge: function merge(geometry, matrix, materialIndexOffset) {\n\n    if (geometry instanceof THREE.Geometry === false) {\n\n      THREE.error('THREE.Geometry.merge(): geometry not an instance of THREE.Geometry.', geometry);\n      return;\n\n    }\n\n    var normalMatrix,\n    vertexOffset = this.vertices.length,\n    vertices1 = this.vertices,\n    vertices2 = geometry.vertices,\n    faces1 = this.faces,\n    faces2 = geometry.faces,\n    uvs1 = this.faceVertexUvs[0],\n    uvs2 = geometry.faceVertexUvs[0];\n\n    if (materialIndexOffset === undefined) materialIndexOffset = 0;\n\n    if (matrix !== undefined) {\n\n      normalMatrix = new THREE.Matrix3().getNormalMatrix(matrix);\n\n    }\n\n    // vertices\n\n    for (var i = 0, il = vertices2.length; i < il; i++) {\n\n      var vertex = vertices2[i];\n\n      var vertexCopy = vertex.clone();\n\n      if (matrix !== undefined) vertexCopy.applyMatrix4(matrix);\n\n      vertices1.push(vertexCopy);\n\n    }\n\n    // faces\n\n    for (i = 0, il = faces2.length; i < il; i++) {\n\n      var face = faces2[i],faceCopy,normal,color,\n      faceVertexNormals = face.vertexNormals,\n      faceVertexColors = face.vertexColors;\n\n      faceCopy = new THREE.Face3(face.a + vertexOffset, face.b + vertexOffset, face.c + vertexOffset);\n      faceCopy.normal.copy(face.normal);\n\n      if (normalMatrix !== undefined) {\n\n        faceCopy.normal.applyMatrix3(normalMatrix).normalize();\n\n      }\n\n      for (var j = 0, jl = faceVertexNormals.length; j < jl; j++) {\n\n        normal = faceVertexNormals[j].clone();\n\n        if (normalMatrix !== undefined) {\n\n          normal.applyMatrix3(normalMatrix).normalize();\n\n        }\n\n        faceCopy.vertexNormals.push(normal);\n\n      }\n\n      faceCopy.color.copy(face.color);\n\n      for (var j = 0, jl = faceVertexColors.length; j < jl; j++) {\n\n        color = faceVertexColors[j];\n        faceCopy.vertexColors.push(color.clone());\n\n      }\n\n      faceCopy.materialIndex = face.materialIndex + materialIndexOffset;\n\n      faces1.push(faceCopy);\n\n    }\n\n    // uvs\n\n    for (i = 0, il = uvs2.length; i < il; i++) {\n\n      var uv = uvs2[i],uvCopy = [];\n\n      if (uv === undefined) {\n\n        continue;\n\n      }\n\n      for (var j = 0, jl = uv.length; j < jl; j++) {\n\n        uvCopy.push(uv[j].clone());\n\n      }\n\n      uvs1.push(uvCopy);\n\n    }\n\n  },\n\n  mergeMesh: function mergeMesh(mesh) {\n\n    if (mesh instanceof THREE.Mesh === false) {\n\n      THREE.error('THREE.Geometry.mergeMesh(): mesh not an instance of THREE.Mesh.', mesh);\n      return;\n\n    }\n\n    mesh.matrixAutoUpdate && mesh.updateMatrix();\n\n    this.merge(mesh.geometry, mesh.matrix);\n\n  },\n\n  /*\n      * Checks for duplicate vertices with hashmap.\n      * Duplicated vertices are removed\n      * and faces' vertices are updated.\n      */\n\n  mergeVertices: function mergeVertices() {\n\n    var verticesMap = {}; // Hashmap for looking up vertice by position coordinates (and making sure they are unique)\n    var unique = [],changes = [];\n\n    var v, key;\n    var precisionPoints = 4; // number of decimal points, eg. 4 for epsilon of 0.0001\n    var precision = Math.pow(10, precisionPoints);\n    var i, il, face;\n    var indices, j, jl;\n\n    for (i = 0, il = this.vertices.length; i < il; i++) {\n\n      v = this.vertices[i];\n      key = Math.round(v.x * precision) + '_' + Math.round(v.y * precision) + '_' + Math.round(v.z * precision);\n\n      if (verticesMap[key] === undefined) {\n\n        verticesMap[key] = i;\n        unique.push(this.vertices[i]);\n        changes[i] = unique.length - 1;\n\n      } else {\n\n        //console.log('Duplicate vertex found. ', i, ' could be using ', verticesMap[key]);\n        changes[i] = changes[verticesMap[key]];\n\n      }\n\n    };\n\n\n    // if faces are completely degenerate after merging vertices, we\n    // have to remove them from the geometry.\n    var faceIndicesToRemove = [];\n\n    for (i = 0, il = this.faces.length; i < il; i++) {\n\n      face = this.faces[i];\n\n      face.a = changes[face.a];\n      face.b = changes[face.b];\n      face.c = changes[face.c];\n\n      indices = [face.a, face.b, face.c];\n\n      var dupIndex = -1;\n\n      // if any duplicate vertices are found in a Face3\n      // we have to remove the face as nothing can be saved\n      for (var n = 0; n < 3; n++) {\n        if (indices[n] == indices[(n + 1) % 3]) {\n\n          dupIndex = n;\n          faceIndicesToRemove.push(i);\n          break;\n\n        }\n      }\n\n    }\n\n    for (i = faceIndicesToRemove.length - 1; i >= 0; i--) {\n      var idx = faceIndicesToRemove[i];\n\n      this.faces.splice(idx, 1);\n\n      for (j = 0, jl = this.faceVertexUvs.length; j < jl; j++) {\n\n        this.faceVertexUvs[j].splice(idx, 1);\n\n      }\n\n    }\n\n    // Use unique set of vertices\n\n    var diff = this.vertices.length - unique.length;\n    this.vertices = unique;\n    return diff;\n\n  },\n\n  toJSON: function toJSON() {\n\n    var output = {\n      metadata: {\n        version: 4.0,\n        type: 'BufferGeometry',\n        generator: 'BufferGeometryExporter' },\n\n      uuid: this.uuid,\n      type: this.type };\n\n\n    if (this.name !== \"\") output.name = this.name;\n\n    if (this.parameters !== undefined) {\n\n      var parameters = this.parameters;\n\n      for (var key in parameters) {\n\n        if (parameters[key] !== undefined) output[key] = parameters[key];\n\n      }\n\n      return output;\n\n    }\n\n    var vertices = [];\n\n    for (var i = 0; i < this.vertices.length; i++) {\n\n      var vertex = this.vertices[i];\n      vertices.push(vertex.x, vertex.y, vertex.z);\n\n    }\n\n    var faces = [];\n    var normals = [];\n    var normalsHash = {};\n    var colors = [];\n    var colorsHash = {};\n    var uvs = [];\n    var uvsHash = {};\n\n    for (var i = 0; i < this.faces.length; i++) {\n\n      var face = this.faces[i];\n\n      var hasMaterial = false; // face.materialIndex !== undefined;\n      var hasFaceUv = false; // deprecated\n      var hasFaceVertexUv = this.faceVertexUvs[0][i] !== undefined;\n      var hasFaceNormal = face.normal.length() > 0;\n      var hasFaceVertexNormal = face.vertexNormals.length > 0;\n      var hasFaceColor = face.color.r !== 1 || face.color.g !== 1 || face.color.b !== 1;\n      var hasFaceVertexColor = face.vertexColors.length > 0;\n\n      var faceType = 0;\n\n      faceType = setBit(faceType, 0, 0);\n      faceType = setBit(faceType, 1, hasMaterial);\n      faceType = setBit(faceType, 2, hasFaceUv);\n      faceType = setBit(faceType, 3, hasFaceVertexUv);\n      faceType = setBit(faceType, 4, hasFaceNormal);\n      faceType = setBit(faceType, 5, hasFaceVertexNormal);\n      faceType = setBit(faceType, 6, hasFaceColor);\n      faceType = setBit(faceType, 7, hasFaceVertexColor);\n\n      faces.push(faceType);\n      faces.push(face.a, face.b, face.c);\n\n\n      /*\n                                          if ( hasMaterial ) {\n                                          \t\tfaces.push( face.materialIndex );\n                                          \t}\n                                          */\n\n\n\n      if (hasFaceVertexUv) {\n\n        var faceVertexUvs = this.faceVertexUvs[0][i];\n\n        faces.push(\n        getUvIndex(faceVertexUvs[0]),\n        getUvIndex(faceVertexUvs[1]),\n        getUvIndex(faceVertexUvs[2]));\n\n\n      }\n\n      if (hasFaceNormal) {\n\n        faces.push(getNormalIndex(face.normal));\n\n      }\n\n      if (hasFaceVertexNormal) {\n\n        var vertexNormals = face.vertexNormals;\n\n        faces.push(\n        getNormalIndex(vertexNormals[0]),\n        getNormalIndex(vertexNormals[1]),\n        getNormalIndex(vertexNormals[2]));\n\n\n      }\n\n      if (hasFaceColor) {\n\n        faces.push(getColorIndex(face.color));\n\n      }\n\n      if (hasFaceVertexColor) {\n\n        var vertexColors = face.vertexColors;\n\n        faces.push(\n        getColorIndex(vertexColors[0]),\n        getColorIndex(vertexColors[1]),\n        getColorIndex(vertexColors[2]));\n\n\n      }\n\n    }\n\n    function setBit(value, position, enabled) {\n\n      return enabled ? value | 1 << position : value & ~(1 << position);\n\n    }\n\n    function getNormalIndex(normal) {\n\n      var hash = normal.x.toString() + normal.y.toString() + normal.z.toString();\n\n      if (normalsHash[hash] !== undefined) {\n\n        return normalsHash[hash];\n\n      }\n\n      normalsHash[hash] = normals.length / 3;\n      normals.push(normal.x, normal.y, normal.z);\n\n      return normalsHash[hash];\n\n    }\n\n    function getColorIndex(color) {\n\n      var hash = color.r.toString() + color.g.toString() + color.b.toString();\n\n      if (colorsHash[hash] !== undefined) {\n\n        return colorsHash[hash];\n\n      }\n\n      colorsHash[hash] = colors.length;\n      colors.push(color.getHex());\n\n      return colorsHash[hash];\n\n    }\n\n    function getUvIndex(uv) {\n\n      var hash = uv.x.toString() + uv.y.toString();\n\n      if (uvsHash[hash] !== undefined) {\n\n        return uvsHash[hash];\n\n      }\n\n      uvsHash[hash] = uvs.length / 2;\n      uvs.push(uv.x, uv.y);\n\n      return uvsHash[hash];\n\n    }\n\n    output.data = {};\n\n    output.data.vertices = vertices;\n    output.data.normals = normals;\n    if (colors.length > 0) output.data.colors = colors;\n    if (uvs.length > 0) output.data.uvs = [uvs]; // temporal backward compatibility\n    output.data.faces = faces;\n\n    //\n\n    return output;\n\n  },\n\n  clone: function clone() {\n\n    var geometry = new THREE.Geometry();\n\n    var vertices = this.vertices;\n\n    for (var i = 0, il = vertices.length; i < il; i++) {\n\n      geometry.vertices.push(vertices[i].clone());\n\n    }\n\n    var faces = this.faces;\n\n    for (var i = 0, il = faces.length; i < il; i++) {\n\n      geometry.faces.push(faces[i].clone());\n\n    }\n\n    for (var i = 0, il = this.faceVertexUvs.length; i < il; i++) {\n\n      var faceVertexUvs = this.faceVertexUvs[i];\n\n      if (geometry.faceVertexUvs[i] === undefined) {\n\n        geometry.faceVertexUvs[i] = [];\n\n      }\n\n      for (var j = 0, jl = faceVertexUvs.length; j < jl; j++) {\n\n        var uvs = faceVertexUvs[j],uvsCopy = [];\n\n        for (var k = 0, kl = uvs.length; k < kl; k++) {\n\n          var uv = uvs[k];\n\n          uvsCopy.push(uv.clone());\n\n        }\n\n        geometry.faceVertexUvs[i].push(uvsCopy);\n\n      }\n\n    }\n\n    return geometry;\n\n  },\n\n  dispose: function dispose() {\n\n    this.dispatchEvent({ type: 'dispose' });\n\n  } };\n\n\n\nTHREE.EventDispatcher.prototype.apply(THREE.Geometry.prototype);\n\nTHREE.GeometryIdCount = 0;\n\n// File:src/cameras/Camera.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author mikael emtinger / http://gomo.se/\n * @author WestLangley / http://github.com/WestLangley\n*/\n\nTHREE.Camera = function () {\n\n  THREE.Object3D.call(this);\n\n  this.type = 'Camera';\n\n  this.matrixWorldInverse = new THREE.Matrix4();\n  this.projectionMatrix = new THREE.Matrix4();\n\n};\n\nTHREE.Camera.prototype = Object.create(THREE.Object3D.prototype);\nTHREE.Camera.prototype.constructor = THREE.Camera;\n\nTHREE.Camera.prototype.getWorldDirection = function () {\n\n  var quaternion = new THREE.Quaternion();\n\n  return function (optionalTarget) {\n\n    var result = optionalTarget || new THREE.Vector3();\n\n    this.getWorldQuaternion(quaternion);\n\n    return result.set(0, 0, -1).applyQuaternion(quaternion);\n\n  };\n\n}();\n\nTHREE.Camera.prototype.lookAt = function () {\n\n  // This routine does not support cameras with rotated and/or translated parent(s)\n\n  var m1 = new THREE.Matrix4();\n\n  return function (vector) {\n\n    m1.lookAt(this.position, vector, this.up);\n\n    this.quaternion.setFromRotationMatrix(m1);\n\n  };\n\n}();\n\nTHREE.Camera.prototype.clone = function (camera) {\n\n  if (camera === undefined) camera = new THREE.Camera();\n\n  THREE.Object3D.prototype.clone.call(this, camera);\n\n  camera.matrixWorldInverse.copy(this.matrixWorldInverse);\n  camera.projectionMatrix.copy(this.projectionMatrix);\n\n  return camera;\n};\n\n// File:src/cameras/CubeCamera.js\n\n/**\n * Camera for rendering cube maps\n *\t- renders scene into axis-aligned cube\n *\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.CubeCamera = function (near, far, cubeResolution) {\n\n  THREE.Object3D.call(this);\n\n  this.type = 'CubeCamera';\n\n  var fov = 90,aspect = 1;\n\n  var cameraPX = new THREE.PerspectiveCamera(fov, aspect, near, far);\n  cameraPX.up.set(0, -1, 0);\n  cameraPX.lookAt(new THREE.Vector3(1, 0, 0));\n  this.add(cameraPX);\n\n  var cameraNX = new THREE.PerspectiveCamera(fov, aspect, near, far);\n  cameraNX.up.set(0, -1, 0);\n  cameraNX.lookAt(new THREE.Vector3(-1, 0, 0));\n  this.add(cameraNX);\n\n  var cameraPY = new THREE.PerspectiveCamera(fov, aspect, near, far);\n  cameraPY.up.set(0, 0, 1);\n  cameraPY.lookAt(new THREE.Vector3(0, 1, 0));\n  this.add(cameraPY);\n\n  var cameraNY = new THREE.PerspectiveCamera(fov, aspect, near, far);\n  cameraNY.up.set(0, 0, -1);\n  cameraNY.lookAt(new THREE.Vector3(0, -1, 0));\n  this.add(cameraNY);\n\n  var cameraPZ = new THREE.PerspectiveCamera(fov, aspect, near, far);\n  cameraPZ.up.set(0, -1, 0);\n  cameraPZ.lookAt(new THREE.Vector3(0, 0, 1));\n  this.add(cameraPZ);\n\n  var cameraNZ = new THREE.PerspectiveCamera(fov, aspect, near, far);\n  cameraNZ.up.set(0, -1, 0);\n  cameraNZ.lookAt(new THREE.Vector3(0, 0, -1));\n  this.add(cameraNZ);\n\n  this.renderTarget = new THREE.WebGLRenderTargetCube(cubeResolution, cubeResolution, { format: THREE.RGBFormat, magFilter: THREE.LinearFilter, minFilter: THREE.LinearFilter });\n\n  this.updateCubeMap = function (renderer, scene) {\n\n    var renderTarget = this.renderTarget;\n    var generateMipmaps = renderTarget.generateMipmaps;\n\n    renderTarget.generateMipmaps = false;\n\n    renderTarget.activeCubeFace = 0;\n    renderer.render(scene, cameraPX, renderTarget);\n\n    renderTarget.activeCubeFace = 1;\n    renderer.render(scene, cameraNX, renderTarget);\n\n    renderTarget.activeCubeFace = 2;\n    renderer.render(scene, cameraPY, renderTarget);\n\n    renderTarget.activeCubeFace = 3;\n    renderer.render(scene, cameraNY, renderTarget);\n\n    renderTarget.activeCubeFace = 4;\n    renderer.render(scene, cameraPZ, renderTarget);\n\n    renderTarget.generateMipmaps = generateMipmaps;\n\n    renderTarget.activeCubeFace = 5;\n    renderer.render(scene, cameraNZ, renderTarget);\n\n  };\n\n};\n\nTHREE.CubeCamera.prototype = Object.create(THREE.Object3D.prototype);\nTHREE.CubeCamera.prototype.constructor = THREE.CubeCamera;\n\n// File:src/cameras/OrthographicCamera.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.OrthographicCamera = function (left, right, top, bottom, near, far) {\n\n  THREE.Camera.call(this);\n\n  this.type = 'OrthographicCamera';\n\n  this.zoom = 1;\n\n  this.left = left;\n  this.right = right;\n  this.top = top;\n  this.bottom = bottom;\n\n  this.near = near !== undefined ? near : 0.1;\n  this.far = far !== undefined ? far : 2000;\n\n  this.updateProjectionMatrix();\n\n};\n\nTHREE.OrthographicCamera.prototype = Object.create(THREE.Camera.prototype);\nTHREE.OrthographicCamera.prototype.constructor = THREE.OrthographicCamera;\n\nTHREE.OrthographicCamera.prototype.updateProjectionMatrix = function () {\n\n  var dx = (this.right - this.left) / (2 * this.zoom);\n  var dy = (this.top - this.bottom) / (2 * this.zoom);\n  var cx = (this.right + this.left) / 2;\n  var cy = (this.top + this.bottom) / 2;\n\n  this.projectionMatrix.makeOrthographic(cx - dx, cx + dx, cy + dy, cy - dy, this.near, this.far);\n\n};\n\nTHREE.OrthographicCamera.prototype.clone = function () {\n\n  var camera = new THREE.OrthographicCamera();\n\n  THREE.Camera.prototype.clone.call(this, camera);\n\n  camera.zoom = this.zoom;\n\n  camera.left = this.left;\n  camera.right = this.right;\n  camera.top = this.top;\n  camera.bottom = this.bottom;\n\n  camera.near = this.near;\n  camera.far = this.far;\n\n  camera.projectionMatrix.copy(this.projectionMatrix);\n\n  return camera;\n};\n\n// File:src/cameras/PerspectiveCamera.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author greggman / http://games.greggman.com/\n * @author zz85 / http://www.lab4games.net/zz85/blog\n */\n\nTHREE.PerspectiveCamera = function (fov, aspect, near, far) {\n\n  THREE.Camera.call(this);\n\n  this.type = 'PerspectiveCamera';\n\n  this.zoom = 1;\n\n  this.fov = fov !== undefined ? fov : 50;\n  this.aspect = aspect !== undefined ? aspect : 1;\n  this.near = near !== undefined ? near : 0.1;\n  this.far = far !== undefined ? far : 2000;\n\n  this.updateProjectionMatrix();\n\n};\n\nTHREE.PerspectiveCamera.prototype = Object.create(THREE.Camera.prototype);\nTHREE.PerspectiveCamera.prototype.constructor = THREE.PerspectiveCamera;\n\n\n/**\n                                                                          * Uses Focal Length (in mm) to estimate and set FOV\n                                                                          * 35mm (fullframe) camera is used if frame size is not specified;\n                                                                          * Formula based on http://www.bobatkins.com/photography/technical/field_of_view.html\n                                                                          */\n\nTHREE.PerspectiveCamera.prototype.setLens = function (focalLength, frameHeight) {\n\n  if (frameHeight === undefined) frameHeight = 24;\n\n  this.fov = 2 * THREE.Math.radToDeg(Math.atan(frameHeight / (focalLength * 2)));\n  this.updateProjectionMatrix();\n\n};\n\n\n/**\n    * Sets an offset in a larger frustum. This is useful for multi-window or\n    * multi-monitor/multi-machine setups.\n    *\n    * For example, if you have 3x2 monitors and each monitor is 1920x1080 and\n    * the monitors are in grid like this\n    *\n    *   +---+---+---+\n    *   | A | B | C |\n    *   +---+---+---+\n    *   | D | E | F |\n    *   +---+---+---+\n    *\n    * then for each monitor you would call it like this\n    *\n    *   var w = 1920;\n    *   var h = 1080;\n    *   var fullWidth = w * 3;\n    *   var fullHeight = h * 2;\n    *\n    *   --A--\n    *   camera.setOffset( fullWidth, fullHeight, w * 0, h * 0, w, h );\n    *   --B--\n    *   camera.setOffset( fullWidth, fullHeight, w * 1, h * 0, w, h );\n    *   --C--\n    *   camera.setOffset( fullWidth, fullHeight, w * 2, h * 0, w, h );\n    *   --D--\n    *   camera.setOffset( fullWidth, fullHeight, w * 0, h * 1, w, h );\n    *   --E--\n    *   camera.setOffset( fullWidth, fullHeight, w * 1, h * 1, w, h );\n    *   --F--\n    *   camera.setOffset( fullWidth, fullHeight, w * 2, h * 1, w, h );\n    *\n    *   Note there is no reason monitors have to be the same size or in a grid.\n    */\n\nTHREE.PerspectiveCamera.prototype.setViewOffset = function (fullWidth, fullHeight, x, y, width, height) {\n\n  this.fullWidth = fullWidth;\n  this.fullHeight = fullHeight;\n  this.x = x;\n  this.y = y;\n  this.width = width;\n  this.height = height;\n\n  this.updateProjectionMatrix();\n\n};\n\n\nTHREE.PerspectiveCamera.prototype.updateProjectionMatrix = function () {\n\n  var fov = THREE.Math.radToDeg(2 * Math.atan(Math.tan(THREE.Math.degToRad(this.fov) * 0.5) / this.zoom));\n\n  if (this.fullWidth) {\n\n    var aspect = this.fullWidth / this.fullHeight;\n    var top = Math.tan(THREE.Math.degToRad(fov * 0.5)) * this.near;\n    var bottom = -top;\n    var left = aspect * bottom;\n    var right = aspect * top;\n    var width = Math.abs(right - left);\n    var height = Math.abs(top - bottom);\n\n    this.projectionMatrix.makeFrustum(\n    left + this.x * width / this.fullWidth,\n    left + (this.x + this.width) * width / this.fullWidth,\n    top - (this.y + this.height) * height / this.fullHeight,\n    top - this.y * height / this.fullHeight,\n    this.near,\n    this.far);\n\n\n  } else {\n\n    this.projectionMatrix.makePerspective(fov, this.aspect, this.near, this.far);\n\n  }\n\n};\n\nTHREE.PerspectiveCamera.prototype.clone = function () {\n\n  var camera = new THREE.PerspectiveCamera();\n\n  THREE.Camera.prototype.clone.call(this, camera);\n\n  camera.zoom = this.zoom;\n\n  camera.fov = this.fov;\n  camera.aspect = this.aspect;\n  camera.near = this.near;\n  camera.far = this.far;\n\n  camera.projectionMatrix.copy(this.projectionMatrix);\n\n  return camera;\n\n};\n\n// File:src/lights/Light.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.Light = function (color) {\n\n  THREE.Object3D.call(this);\n\n  this.type = 'Light';\n\n  this.color = new THREE.Color(color);\n\n};\n\nTHREE.Light.prototype = Object.create(THREE.Object3D.prototype);\nTHREE.Light.prototype.constructor = THREE.Light;\n\nTHREE.Light.prototype.clone = function (light) {\n\n  if (light === undefined) light = new THREE.Light();\n\n  THREE.Object3D.prototype.clone.call(this, light);\n\n  light.color.copy(this.color);\n\n  return light;\n\n};\n\n// File:src/lights/AmbientLight.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.AmbientLight = function (color) {\n\n  THREE.Light.call(this, color);\n\n  this.type = 'AmbientLight';\n\n};\n\nTHREE.AmbientLight.prototype = Object.create(THREE.Light.prototype);\nTHREE.AmbientLight.prototype.constructor = THREE.AmbientLight;\n\nTHREE.AmbientLight.prototype.clone = function () {\n\n  var light = new THREE.AmbientLight();\n\n  THREE.Light.prototype.clone.call(this, light);\n\n  return light;\n\n};\n\n// File:src/lights/AreaLight.js\n\n/**\n * @author MPanknin / http://www.redplant.de/\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.AreaLight = function (color, intensity) {\n\n  THREE.Light.call(this, color);\n\n  this.type = 'AreaLight';\n\n  this.normal = new THREE.Vector3(0, -1, 0);\n  this.right = new THREE.Vector3(1, 0, 0);\n\n  this.intensity = intensity !== undefined ? intensity : 1;\n\n  this.width = 1.0;\n  this.height = 1.0;\n\n  this.constantAttenuation = 1.5;\n  this.linearAttenuation = 0.5;\n  this.quadraticAttenuation = 0.1;\n\n};\n\nTHREE.AreaLight.prototype = Object.create(THREE.Light.prototype);\nTHREE.AreaLight.prototype.constructor = THREE.AreaLight;\n\n\n// File:src/lights/DirectionalLight.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.DirectionalLight = function (color, intensity) {\n\n  THREE.Light.call(this, color);\n\n  this.type = 'DirectionalLight';\n\n  this.position.set(0, 1, 0);\n  this.target = new THREE.Object3D();\n\n  this.intensity = intensity !== undefined ? intensity : 1;\n\n  this.castShadow = false;\n  this.onlyShadow = false;\n\n  //\n\n  this.shadowCameraNear = 50;\n  this.shadowCameraFar = 5000;\n\n  this.shadowCameraLeft = -500;\n  this.shadowCameraRight = 500;\n  this.shadowCameraTop = 500;\n  this.shadowCameraBottom = -500;\n\n  this.shadowCameraVisible = false;\n\n  this.shadowBias = 0;\n  this.shadowDarkness = 0.5;\n\n  this.shadowMapWidth = 512;\n  this.shadowMapHeight = 512;\n\n  //\n\n  this.shadowCascade = false;\n\n  this.shadowCascadeOffset = new THREE.Vector3(0, 0, -1000);\n  this.shadowCascadeCount = 2;\n\n  this.shadowCascadeBias = [0, 0, 0];\n  this.shadowCascadeWidth = [512, 512, 512];\n  this.shadowCascadeHeight = [512, 512, 512];\n\n  this.shadowCascadeNearZ = [-1.000, 0.990, 0.998];\n  this.shadowCascadeFarZ = [0.990, 0.998, 1.000];\n\n  this.shadowCascadeArray = [];\n\n  //\n\n  this.shadowMap = null;\n  this.shadowMapSize = null;\n  this.shadowCamera = null;\n  this.shadowMatrix = null;\n\n};\n\nTHREE.DirectionalLight.prototype = Object.create(THREE.Light.prototype);\nTHREE.DirectionalLight.prototype.constructor = THREE.DirectionalLight;\n\nTHREE.DirectionalLight.prototype.clone = function () {\n\n  var light = new THREE.DirectionalLight();\n\n  THREE.Light.prototype.clone.call(this, light);\n\n  light.target = this.target.clone();\n\n  light.intensity = this.intensity;\n\n  light.castShadow = this.castShadow;\n  light.onlyShadow = this.onlyShadow;\n\n  //\n\n  light.shadowCameraNear = this.shadowCameraNear;\n  light.shadowCameraFar = this.shadowCameraFar;\n\n  light.shadowCameraLeft = this.shadowCameraLeft;\n  light.shadowCameraRight = this.shadowCameraRight;\n  light.shadowCameraTop = this.shadowCameraTop;\n  light.shadowCameraBottom = this.shadowCameraBottom;\n\n  light.shadowCameraVisible = this.shadowCameraVisible;\n\n  light.shadowBias = this.shadowBias;\n  light.shadowDarkness = this.shadowDarkness;\n\n  light.shadowMapWidth = this.shadowMapWidth;\n  light.shadowMapHeight = this.shadowMapHeight;\n\n  //\n\n  light.shadowCascade = this.shadowCascade;\n\n  light.shadowCascadeOffset.copy(this.shadowCascadeOffset);\n  light.shadowCascadeCount = this.shadowCascadeCount;\n\n  light.shadowCascadeBias = this.shadowCascadeBias.slice(0);\n  light.shadowCascadeWidth = this.shadowCascadeWidth.slice(0);\n  light.shadowCascadeHeight = this.shadowCascadeHeight.slice(0);\n\n  light.shadowCascadeNearZ = this.shadowCascadeNearZ.slice(0);\n  light.shadowCascadeFarZ = this.shadowCascadeFarZ.slice(0);\n\n  return light;\n\n};\n\n// File:src/lights/HemisphereLight.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.HemisphereLight = function (skyColor, groundColor, intensity) {\n\n  THREE.Light.call(this, skyColor);\n\n  this.type = 'HemisphereLight';\n\n  this.position.set(0, 100, 0);\n\n  this.groundColor = new THREE.Color(groundColor);\n  this.intensity = intensity !== undefined ? intensity : 1;\n\n};\n\nTHREE.HemisphereLight.prototype = Object.create(THREE.Light.prototype);\nTHREE.HemisphereLight.prototype.constructor = THREE.HemisphereLight;\n\nTHREE.HemisphereLight.prototype.clone = function () {\n\n  var light = new THREE.HemisphereLight();\n\n  THREE.Light.prototype.clone.call(this, light);\n\n  light.groundColor.copy(this.groundColor);\n  light.intensity = this.intensity;\n\n  return light;\n\n};\n\n// File:src/lights/PointLight.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.PointLight = function (color, intensity, distance, decay) {\n\n  THREE.Light.call(this, color);\n\n  this.type = 'PointLight';\n\n  this.intensity = intensity !== undefined ? intensity : 1;\n  this.distance = distance !== undefined ? distance : 0;\n  this.decay = decay !== undefined ? decay : 1; // for physically correct lights, should be 2.\n\n};\n\nTHREE.PointLight.prototype = Object.create(THREE.Light.prototype);\nTHREE.PointLight.prototype.constructor = THREE.PointLight;\n\nTHREE.PointLight.prototype.clone = function () {\n\n  var light = new THREE.PointLight();\n\n  THREE.Light.prototype.clone.call(this, light);\n\n  light.intensity = this.intensity;\n  light.distance = this.distance;\n  light.decay = this.decay;\n\n  return light;\n\n};\n\n// File:src/lights/SpotLight.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.SpotLight = function (color, intensity, distance, angle, exponent, decay) {\n\n  THREE.Light.call(this, color);\n\n  this.type = 'SpotLight';\n\n  this.position.set(0, 1, 0);\n  this.target = new THREE.Object3D();\n\n  this.intensity = intensity !== undefined ? intensity : 1;\n  this.distance = distance !== undefined ? distance : 0;\n  this.angle = angle !== undefined ? angle : Math.PI / 3;\n  this.exponent = exponent !== undefined ? exponent : 10;\n  this.decay = decay !== undefined ? decay : 1; // for physically correct lights, should be 2.\n\n  this.castShadow = false;\n  this.onlyShadow = false;\n\n  //\n\n  this.shadowCameraNear = 50;\n  this.shadowCameraFar = 5000;\n  this.shadowCameraFov = 50;\n\n  this.shadowCameraVisible = false;\n\n  this.shadowBias = 0;\n  this.shadowDarkness = 0.5;\n\n  this.shadowMapWidth = 512;\n  this.shadowMapHeight = 512;\n\n  //\n\n  this.shadowMap = null;\n  this.shadowMapSize = null;\n  this.shadowCamera = null;\n  this.shadowMatrix = null;\n\n};\n\nTHREE.SpotLight.prototype = Object.create(THREE.Light.prototype);\nTHREE.SpotLight.prototype.constructor = THREE.SpotLight;\n\nTHREE.SpotLight.prototype.clone = function () {\n\n  var light = new THREE.SpotLight();\n\n  THREE.Light.prototype.clone.call(this, light);\n\n  light.target = this.target.clone();\n\n  light.intensity = this.intensity;\n  light.distance = this.distance;\n  light.angle = this.angle;\n  light.exponent = this.exponent;\n  light.decay = this.decay;\n\n  light.castShadow = this.castShadow;\n  light.onlyShadow = this.onlyShadow;\n\n  //\n\n  light.shadowCameraNear = this.shadowCameraNear;\n  light.shadowCameraFar = this.shadowCameraFar;\n  light.shadowCameraFov = this.shadowCameraFov;\n\n  light.shadowCameraVisible = this.shadowCameraVisible;\n\n  light.shadowBias = this.shadowBias;\n  light.shadowDarkness = this.shadowDarkness;\n\n  light.shadowMapWidth = this.shadowMapWidth;\n  light.shadowMapHeight = this.shadowMapHeight;\n\n  return light;\n\n};\n\n// File:src/loaders/Cache.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.Cache = {\n\n  files: {},\n\n  add: function add(key, file) {\n\n    // console.log( 'THREE.Cache', 'Adding key:', key );\n\n    this.files[key] = file;\n\n  },\n\n  get: function get(key) {\n\n    // console.log( 'THREE.Cache', 'Checking key:', key );\n\n    return this.files[key];\n\n  },\n\n  remove: function remove(key) {\n\n    delete this.files[key];\n\n  },\n\n  clear: function clear() {\n\n    this.files = {};\n\n  } };\n\n\n\n// File:src/loaders/Loader.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.Loader = function (showStatus) {\n\n  this.showStatus = showStatus;\n  this.statusDomElement = showStatus ? THREE.Loader.prototype.addStatusElement() : null;\n\n  this.imageLoader = new THREE.ImageLoader();\n\n  this.onLoadStart = function () {};\n  this.onLoadProgress = function () {};\n  this.onLoadComplete = function () {};\n\n};\n\nTHREE.Loader.prototype = {\n\n  constructor: THREE.Loader,\n\n  crossOrigin: undefined,\n\n  addStatusElement: function addStatusElement() {\n\n    var e = document.createElement('div');\n\n    e.style.position = 'absolute';\n    e.style.right = '0px';\n    e.style.top = '0px';\n    e.style.fontSize = '0.8em';\n    e.style.textAlign = 'left';\n    e.style.background = 'rgba(0,0,0,0.25)';\n    e.style.color = '#fff';\n    e.style.width = '120px';\n    e.style.padding = '0.5em 0.5em 0.5em 0.5em';\n    e.style.zIndex = 1000;\n\n    e.innerHTML = 'Loading ...';\n\n    return e;\n\n  },\n\n  updateProgress: function updateProgress(progress) {\n\n    var message = 'Loaded ';\n\n    if (progress.total) {\n\n      message += (100 * progress.loaded / progress.total).toFixed(0) + '%';\n\n\n    } else {\n\n      message += (progress.loaded / 1024).toFixed(2) + ' KB';\n\n    }\n\n    this.statusDomElement.innerHTML = message;\n\n  },\n\n  extractUrlBase: function extractUrlBase(url) {\n\n    var parts = url.split('/');\n\n    if (parts.length === 1) return './';\n\n    parts.pop();\n\n    return parts.join('/') + '/';\n\n  },\n\n  initMaterials: function initMaterials(materials, texturePath) {\n\n    var array = [];\n\n    for (var i = 0; i < materials.length; ++i) {\n\n      array[i] = this.createMaterial(materials[i], texturePath);\n\n    }\n\n    return array;\n\n  },\n\n  needsTangents: function needsTangents(materials) {\n\n    for (var i = 0, il = materials.length; i < il; i++) {\n\n      var m = materials[i];\n\n      if (m instanceof THREE.ShaderMaterial) return true;\n\n    }\n\n    return false;\n\n  },\n\n  createMaterial: function createMaterial(m, texturePath) {\n\n    var scope = this;\n\n    function nearest_pow2(n) {\n\n      var l = Math.log(n) / Math.LN2;\n      return Math.pow(2, Math.round(l));\n\n    }\n\n    function create_texture(where, name, sourceFile, repeat, offset, wrap, anisotropy) {\n\n      var fullPath = texturePath + sourceFile;\n\n      var texture;\n\n      var loader = THREE.Loader.Handlers.get(fullPath);\n\n      if (loader !== null) {\n\n        texture = loader.load(fullPath);\n\n      } else {\n\n        texture = new THREE.Texture();\n\n        loader = scope.imageLoader;\n        loader.crossOrigin = scope.crossOrigin;\n        loader.load(fullPath, function (image) {\n\n          if (THREE.Math.isPowerOfTwo(image.width) === false ||\n          THREE.Math.isPowerOfTwo(image.height) === false) {\n\n            var width = nearest_pow2(image.width);\n            var height = nearest_pow2(image.height);\n\n            var canvas = document.createElement('canvas');\n            canvas.width = width;\n            canvas.height = height;\n\n            var context = canvas.getContext('2d');\n            context.drawImage(image, 0, 0, width, height);\n\n            texture.image = canvas;\n\n          } else {\n\n            texture.image = image;\n\n          }\n\n          texture.needsUpdate = true;\n\n        });\n\n      }\n\n      texture.sourceFile = sourceFile;\n\n      if (repeat) {\n\n        texture.repeat.set(repeat[0], repeat[1]);\n\n        if (repeat[0] !== 1) texture.wrapS = THREE.RepeatWrapping;\n        if (repeat[1] !== 1) texture.wrapT = THREE.RepeatWrapping;\n\n      }\n\n      if (offset) {\n\n        texture.offset.set(offset[0], offset[1]);\n\n      }\n\n      if (wrap) {\n\n        var wrapMap = {\n          'repeat': THREE.RepeatWrapping,\n          'mirror': THREE.MirroredRepeatWrapping };\n\n\n        if (wrapMap[wrap[0]] !== undefined) texture.wrapS = wrapMap[wrap[0]];\n        if (wrapMap[wrap[1]] !== undefined) texture.wrapT = wrapMap[wrap[1]];\n\n      }\n\n      if (anisotropy) {\n\n        texture.anisotropy = anisotropy;\n\n      }\n\n      where[name] = texture;\n\n    }\n\n    function rgb2hex(rgb) {\n\n      return (rgb[0] * 255 << 16) + (rgb[1] * 255 << 8) + rgb[2] * 255;\n\n    }\n\n    // defaults\n\n    var mtype = 'MeshLambertMaterial';\n    var mpars = { color: 0xeeeeee, opacity: 1.0, map: null, lightMap: null, normalMap: null, bumpMap: null, wireframe: false };\n\n    // parameters from model file\n\n    if (m.shading) {\n\n      var shading = m.shading.toLowerCase();\n\n      if (shading === 'phong') mtype = 'MeshPhongMaterial';else\n      if (shading === 'basic') mtype = 'MeshBasicMaterial';\n\n    }\n\n    if (m.blending !== undefined && THREE[m.blending] !== undefined) {\n\n      mpars.blending = THREE[m.blending];\n\n    }\n\n    if (m.transparent !== undefined) {\n\n      mpars.transparent = m.transparent;\n\n    }\n\n    if (m.opacity !== undefined && m.opacity < 1.0) {\n\n      mpars.transparent = true;\n\n    }\n\n    if (m.depthTest !== undefined) {\n\n      mpars.depthTest = m.depthTest;\n\n    }\n\n    if (m.depthWrite !== undefined) {\n\n      mpars.depthWrite = m.depthWrite;\n\n    }\n\n    if (m.visible !== undefined) {\n\n      mpars.visible = m.visible;\n\n    }\n\n    if (m.flipSided !== undefined) {\n\n      mpars.side = THREE.BackSide;\n\n    }\n\n    if (m.doubleSided !== undefined) {\n\n      mpars.side = THREE.DoubleSide;\n\n    }\n\n    if (m.wireframe !== undefined) {\n\n      mpars.wireframe = m.wireframe;\n\n    }\n\n    if (m.vertexColors !== undefined) {\n\n      if (m.vertexColors === 'face') {\n\n        mpars.vertexColors = THREE.FaceColors;\n\n      } else if (m.vertexColors) {\n\n        mpars.vertexColors = THREE.VertexColors;\n\n      }\n\n    }\n\n    // colors\n\n    if (m.colorDiffuse) {\n\n      mpars.color = rgb2hex(m.colorDiffuse);\n\n    } else if (m.DbgColor) {\n\n      mpars.color = m.DbgColor;\n\n    }\n\n    if (m.colorSpecular) {\n\n      mpars.specular = rgb2hex(m.colorSpecular);\n\n    }\n\n    if (m.colorEmissive) {\n\n      mpars.emissive = rgb2hex(m.colorEmissive);\n\n    }\n\n    // modifiers\n\n    if (m.transparency !== undefined) {\n\n      console.warn('THREE.Loader: transparency has been renamed to opacity');\n      m.opacity = m.transparency;\n\n    }\n\n    if (m.opacity !== undefined) {\n\n      mpars.opacity = m.opacity;\n\n    }\n\n    if (m.specularCoef) {\n\n      mpars.shininess = m.specularCoef;\n\n    }\n\n    // textures\n\n    if (m.mapDiffuse && texturePath) {\n\n      create_texture(mpars, 'map', m.mapDiffuse, m.mapDiffuseRepeat, m.mapDiffuseOffset, m.mapDiffuseWrap, m.mapDiffuseAnisotropy);\n\n    }\n\n    if (m.mapLight && texturePath) {\n\n      create_texture(mpars, 'lightMap', m.mapLight, m.mapLightRepeat, m.mapLightOffset, m.mapLightWrap, m.mapLightAnisotropy);\n\n    }\n\n    if (m.mapBump && texturePath) {\n\n      create_texture(mpars, 'bumpMap', m.mapBump, m.mapBumpRepeat, m.mapBumpOffset, m.mapBumpWrap, m.mapBumpAnisotropy);\n\n    }\n\n    if (m.mapNormal && texturePath) {\n\n      create_texture(mpars, 'normalMap', m.mapNormal, m.mapNormalRepeat, m.mapNormalOffset, m.mapNormalWrap, m.mapNormalAnisotropy);\n\n    }\n\n    if (m.mapSpecular && texturePath) {\n\n      create_texture(mpars, 'specularMap', m.mapSpecular, m.mapSpecularRepeat, m.mapSpecularOffset, m.mapSpecularWrap, m.mapSpecularAnisotropy);\n\n    }\n\n    if (m.mapAlpha && texturePath) {\n\n      create_texture(mpars, 'alphaMap', m.mapAlpha, m.mapAlphaRepeat, m.mapAlphaOffset, m.mapAlphaWrap, m.mapAlphaAnisotropy);\n\n    }\n\n    //\n\n    if (m.mapBumpScale) {\n\n      mpars.bumpScale = m.mapBumpScale;\n\n    }\n\n    if (m.mapNormalFactor) {\n\n      mpars.normalScale = new THREE.Vector2(m.mapNormalFactor, m.mapNormalFactor);\n\n    }\n\n    var material = new THREE[mtype](mpars);\n\n    if (m.DbgName !== undefined) material.name = m.DbgName;\n\n    return material;\n\n  } };\n\n\n\nTHREE.Loader.Handlers = {\n\n  handlers: [],\n\n  add: function add(regex, loader) {\n\n    this.handlers.push(regex, loader);\n\n  },\n\n  get: function get(file) {\n\n    for (var i = 0, l = this.handlers.length; i < l; i += 2) {\n\n      var regex = this.handlers[i];\n      var loader = this.handlers[i + 1];\n\n      if (regex.test(file)) {\n\n        return loader;\n\n      }\n\n    }\n\n    return null;\n\n  } };\n\n\n\n// File:src/loaders/XHRLoader.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.XHRLoader = function (manager) {\n\n  this.manager = manager !== undefined ? manager : THREE.DefaultLoadingManager;\n\n};\n\nTHREE.XHRLoader.prototype = {\n\n  constructor: THREE.XHRLoader,\n\n  load: function load(url, onLoad, onProgress, onError) {\n\n    var scope = this;\n\n    var cached = THREE.Cache.get(url);\n\n    if (cached !== undefined) {\n\n      if (onLoad) onLoad(cached);\n      return;\n\n    }\n\n    var request = new XMLHttpRequest();\n    request.open('GET', url, true);\n\n    request.addEventListener('load', function (event) {\n\n      THREE.Cache.add(url, this.response);\n\n      if (onLoad) onLoad(this.response);\n\n      scope.manager.itemEnd(url);\n\n    }, false);\n\n    if (onProgress !== undefined) {\n\n      request.addEventListener('progress', function (event) {\n\n        onProgress(event);\n\n      }, false);\n\n    }\n\n    if (onError !== undefined) {\n\n      request.addEventListener('error', function (event) {\n\n        onError(event);\n\n      }, false);\n\n    }\n\n    if (this.crossOrigin !== undefined) request.crossOrigin = this.crossOrigin;\n    if (this.responseType !== undefined) request.responseType = this.responseType;\n\n    request.send(null);\n\n    scope.manager.itemStart(url);\n\n  },\n\n  setResponseType: function setResponseType(value) {\n\n    this.responseType = value;\n\n  },\n\n  setCrossOrigin: function setCrossOrigin(value) {\n\n    this.crossOrigin = value;\n\n  } };\n\n\n\n// File:src/loaders/ImageLoader.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.ImageLoader = function (manager) {\n\n  this.manager = manager !== undefined ? manager : THREE.DefaultLoadingManager;\n\n};\n\nTHREE.ImageLoader.prototype = {\n\n  constructor: THREE.ImageLoader,\n\n  load: function load(url, onLoad, onProgress, onError) {\n\n    var scope = this;\n\n    var cached = THREE.Cache.get(url);\n\n    if (cached !== undefined) {\n\n      onLoad(cached);\n      return;\n\n    }\n\n    var image = document.createElement('img');\n\n    image.addEventListener('load', function (event) {\n\n      THREE.Cache.add(url, this);\n\n      if (onLoad) onLoad(this);\n\n      scope.manager.itemEnd(url);\n\n    }, false);\n\n    if (onProgress !== undefined) {\n\n      image.addEventListener('progress', function (event) {\n\n        onProgress(event);\n\n      }, false);\n\n    }\n\n    if (onError !== undefined) {\n\n      image.addEventListener('error', function (event) {\n\n        onError(event);\n\n      }, false);\n\n    }\n\n    if (this.crossOrigin !== undefined) image.crossOrigin = this.crossOrigin;\n\n    image.src = url;\n\n    scope.manager.itemStart(url);\n\n    return image;\n\n  },\n\n  setCrossOrigin: function setCrossOrigin(value) {\n\n    this.crossOrigin = value;\n\n  } };\n\n\n\n// File:src/loaders/JSONLoader.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.JSONLoader = function (showStatus) {\n\n  THREE.Loader.call(this, showStatus);\n\n  this.withCredentials = false;\n\n};\n\nTHREE.JSONLoader.prototype = Object.create(THREE.Loader.prototype);\nTHREE.JSONLoader.prototype.constructor = THREE.JSONLoader;\n\nTHREE.JSONLoader.prototype.load = function (url, callback, texturePath) {\n\n  // todo: unify load API to for easier SceneLoader use\n\n  texturePath = texturePath && typeof texturePath === 'string' ? texturePath : this.extractUrlBase(url);\n\n  this.onLoadStart();\n  this.loadAjaxJSON(this, url, callback, texturePath);\n\n};\n\nTHREE.JSONLoader.prototype.loadAjaxJSON = function (context, url, callback, texturePath, callbackProgress) {\n\n  var xhr = new XMLHttpRequest();\n\n  var length = 0;\n\n  xhr.onreadystatechange = function () {\n\n    if (xhr.readyState === xhr.DONE) {\n\n      if (xhr.status === 200 || xhr.status === 0) {\n\n        if (xhr.responseText) {\n\n          var json = JSON.parse(xhr.responseText);\n          var metadata = json.metadata;\n\n          if (metadata !== undefined) {\n\n            if (metadata.type === 'object') {\n\n              THREE.error('THREE.JSONLoader: ' + url + ' should be loaded with THREE.ObjectLoader instead.');\n              return;\n\n            }\n\n            if (metadata.type === 'scene') {\n\n              THREE.error('THREE.JSONLoader: ' + url + ' seems to be a Scene. Use THREE.SceneLoader instead.');\n              return;\n\n            }\n\n          }\n\n          var result = context.parse(json, texturePath);\n          callback(result.geometry, result.materials);\n\n        } else {\n\n          THREE.error('THREE.JSONLoader: ' + url + ' seems to be unreachable or the file is empty.');\n\n        }\n\n        // in context of more complex asset initialization\n        // do not block on single failed file\n        // maybe should go even one more level up\n\n        context.onLoadComplete();\n\n      } else {\n\n        THREE.error('THREE.JSONLoader: Couldn\\'t load ' + url + ' (' + xhr.status + ')');\n\n      }\n\n    } else if (xhr.readyState === xhr.LOADING) {\n\n      if (callbackProgress) {\n\n        if (length === 0) {\n\n          length = xhr.getResponseHeader('Content-Length');\n\n        }\n\n        callbackProgress({ total: length, loaded: xhr.responseText.length });\n\n      }\n\n    } else if (xhr.readyState === xhr.HEADERS_RECEIVED) {\n\n      if (callbackProgress !== undefined) {\n\n        length = xhr.getResponseHeader('Content-Length');\n\n      }\n\n    }\n\n  };\n\n  xhr.open('GET', url, true);\n  xhr.withCredentials = this.withCredentials;\n  xhr.send(null);\n\n};\n\nTHREE.JSONLoader.prototype.parse = function (json, texturePath) {\n\n  var geometry = new THREE.Geometry(),\n  scale = json.scale !== undefined ? 1.0 / json.scale : 1.0;\n\n  parseModel(scale);\n\n  parseSkin();\n  parseMorphing(scale);\n\n  geometry.computeFaceNormals();\n  geometry.computeBoundingSphere();\n\n  function parseModel(scale) {\n\n    function isBitSet(value, position) {\n\n      return value & 1 << position;\n\n    }\n\n    var i,j,fi,\n\n    offset,zLength,\n\n    colorIndex,normalIndex,uvIndex,materialIndex,\n\n    type,\n    isQuad,\n    hasMaterial,\n    hasFaceVertexUv,\n    hasFaceNormal,hasFaceVertexNormal,\n    hasFaceColor,hasFaceVertexColor,\n\n    vertex,face,faceA,faceB,hex,normal,\n\n    uvLayer,uv,u,v,\n\n    faces = json.faces,\n    vertices = json.vertices,\n    normals = json.normals,\n    colors = json.colors,\n\n    nUvLayers = 0;\n\n    if (json.uvs !== undefined) {\n\n      // disregard empty arrays\n\n      for (i = 0; i < json.uvs.length; i++) {\n\n        if (json.uvs[i].length) nUvLayers++;\n\n      }\n\n      for (i = 0; i < nUvLayers; i++) {\n\n        geometry.faceVertexUvs[i] = [];\n\n      }\n\n    }\n\n    offset = 0;\n    zLength = vertices.length;\n\n    while (offset < zLength) {\n\n      vertex = new THREE.Vector3();\n\n      vertex.x = vertices[offset++] * scale;\n      vertex.y = vertices[offset++] * scale;\n      vertex.z = vertices[offset++] * scale;\n\n      geometry.vertices.push(vertex);\n\n    }\n\n    offset = 0;\n    zLength = faces.length;\n\n    while (offset < zLength) {\n\n      type = faces[offset++];\n\n\n      isQuad = isBitSet(type, 0);\n      hasMaterial = isBitSet(type, 1);\n      hasFaceVertexUv = isBitSet(type, 3);\n      hasFaceNormal = isBitSet(type, 4);\n      hasFaceVertexNormal = isBitSet(type, 5);\n      hasFaceColor = isBitSet(type, 6);\n      hasFaceVertexColor = isBitSet(type, 7);\n\n      // console.log(\"type\", type, \"bits\", isQuad, hasMaterial, hasFaceVertexUv, hasFaceNormal, hasFaceVertexNormal, hasFaceColor, hasFaceVertexColor);\n\n      if (isQuad) {\n\n        faceA = new THREE.Face3();\n        faceA.a = faces[offset];\n        faceA.b = faces[offset + 1];\n        faceA.c = faces[offset + 3];\n\n        faceB = new THREE.Face3();\n        faceB.a = faces[offset + 1];\n        faceB.b = faces[offset + 2];\n        faceB.c = faces[offset + 3];\n\n        offset += 4;\n\n        if (hasMaterial) {\n\n          materialIndex = faces[offset++];\n          faceA.materialIndex = materialIndex;\n          faceB.materialIndex = materialIndex;\n\n        }\n\n        // to get face <=> uv index correspondence\n\n        fi = geometry.faces.length;\n\n        if (hasFaceVertexUv) {\n\n          for (i = 0; i < nUvLayers; i++) {\n\n            uvLayer = json.uvs[i];\n\n            geometry.faceVertexUvs[i][fi] = [];\n            geometry.faceVertexUvs[i][fi + 1] = [];\n\n            for (j = 0; j < 4; j++) {\n\n              uvIndex = faces[offset++];\n\n              u = uvLayer[uvIndex * 2];\n              v = uvLayer[uvIndex * 2 + 1];\n\n              uv = new THREE.Vector2(u, v);\n\n              if (j !== 2) geometry.faceVertexUvs[i][fi].push(uv);\n              if (j !== 0) geometry.faceVertexUvs[i][fi + 1].push(uv);\n\n            }\n\n          }\n\n        }\n\n        if (hasFaceNormal) {\n\n          normalIndex = faces[offset++] * 3;\n\n          faceA.normal.set(\n          normals[normalIndex++],\n          normals[normalIndex++],\n          normals[normalIndex]);\n\n\n          faceB.normal.copy(faceA.normal);\n\n        }\n\n        if (hasFaceVertexNormal) {\n\n          for (i = 0; i < 4; i++) {\n\n            normalIndex = faces[offset++] * 3;\n\n            normal = new THREE.Vector3(\n            normals[normalIndex++],\n            normals[normalIndex++],\n            normals[normalIndex]);\n\n\n\n            if (i !== 2) faceA.vertexNormals.push(normal);\n            if (i !== 0) faceB.vertexNormals.push(normal);\n\n          }\n\n        }\n\n\n        if (hasFaceColor) {\n\n          colorIndex = faces[offset++];\n          hex = colors[colorIndex];\n\n          faceA.color.setHex(hex);\n          faceB.color.setHex(hex);\n\n        }\n\n\n        if (hasFaceVertexColor) {\n\n          for (i = 0; i < 4; i++) {\n\n            colorIndex = faces[offset++];\n            hex = colors[colorIndex];\n\n            if (i !== 2) faceA.vertexColors.push(new THREE.Color(hex));\n            if (i !== 0) faceB.vertexColors.push(new THREE.Color(hex));\n\n          }\n\n        }\n\n        geometry.faces.push(faceA);\n        geometry.faces.push(faceB);\n\n      } else {\n\n        face = new THREE.Face3();\n        face.a = faces[offset++];\n        face.b = faces[offset++];\n        face.c = faces[offset++];\n\n        if (hasMaterial) {\n\n          materialIndex = faces[offset++];\n          face.materialIndex = materialIndex;\n\n        }\n\n        // to get face <=> uv index correspondence\n\n        fi = geometry.faces.length;\n\n        if (hasFaceVertexUv) {\n\n          for (i = 0; i < nUvLayers; i++) {\n\n            uvLayer = json.uvs[i];\n\n            geometry.faceVertexUvs[i][fi] = [];\n\n            for (j = 0; j < 3; j++) {\n\n              uvIndex = faces[offset++];\n\n              u = uvLayer[uvIndex * 2];\n              v = uvLayer[uvIndex * 2 + 1];\n\n              uv = new THREE.Vector2(u, v);\n\n              geometry.faceVertexUvs[i][fi].push(uv);\n\n            }\n\n          }\n\n        }\n\n        if (hasFaceNormal) {\n\n          normalIndex = faces[offset++] * 3;\n\n          face.normal.set(\n          normals[normalIndex++],\n          normals[normalIndex++],\n          normals[normalIndex]);\n\n\n        }\n\n        if (hasFaceVertexNormal) {\n\n          for (i = 0; i < 3; i++) {\n\n            normalIndex = faces[offset++] * 3;\n\n            normal = new THREE.Vector3(\n            normals[normalIndex++],\n            normals[normalIndex++],\n            normals[normalIndex]);\n\n\n            face.vertexNormals.push(normal);\n\n          }\n\n        }\n\n\n        if (hasFaceColor) {\n\n          colorIndex = faces[offset++];\n          face.color.setHex(colors[colorIndex]);\n\n        }\n\n\n        if (hasFaceVertexColor) {\n\n          for (i = 0; i < 3; i++) {\n\n            colorIndex = faces[offset++];\n            face.vertexColors.push(new THREE.Color(colors[colorIndex]));\n\n          }\n\n        }\n\n        geometry.faces.push(face);\n\n      }\n\n    }\n\n  };\n\n  function parseSkin() {\n    var influencesPerVertex = json.influencesPerVertex !== undefined ? json.influencesPerVertex : 2;\n\n    if (json.skinWeights) {\n\n      for (var i = 0, l = json.skinWeights.length; i < l; i += influencesPerVertex) {\n\n        var x = json.skinWeights[i];\n        var y = influencesPerVertex > 1 ? json.skinWeights[i + 1] : 0;\n        var z = influencesPerVertex > 2 ? json.skinWeights[i + 2] : 0;\n        var w = influencesPerVertex > 3 ? json.skinWeights[i + 3] : 0;\n\n        geometry.skinWeights.push(new THREE.Vector4(x, y, z, w));\n\n      }\n\n    }\n\n    if (json.skinIndices) {\n\n      for (var i = 0, l = json.skinIndices.length; i < l; i += influencesPerVertex) {\n\n        var a = json.skinIndices[i];\n        var b = influencesPerVertex > 1 ? json.skinIndices[i + 1] : 0;\n        var c = influencesPerVertex > 2 ? json.skinIndices[i + 2] : 0;\n        var d = influencesPerVertex > 3 ? json.skinIndices[i + 3] : 0;\n\n        geometry.skinIndices.push(new THREE.Vector4(a, b, c, d));\n\n      }\n\n    }\n\n    geometry.bones = json.bones;\n\n    if (geometry.bones && geometry.bones.length > 0 && (geometry.skinWeights.length !== geometry.skinIndices.length || geometry.skinIndices.length !== geometry.vertices.length)) {\n\n      THREE.warn('THREE.JSONLoader: When skinning, number of vertices (' + geometry.vertices.length + '), skinIndices (' +\n      geometry.skinIndices.length + '), and skinWeights (' + geometry.skinWeights.length + ') should match.');\n\n    }\n\n\n    // could change this to json.animations[0] or remove completely\n\n    geometry.animation = json.animation;\n    geometry.animations = json.animations;\n\n  };\n\n  function parseMorphing(scale) {\n\n    if (json.morphTargets !== undefined) {\n\n      var i, l, v, vl, dstVertices, srcVertices;\n\n      for (i = 0, l = json.morphTargets.length; i < l; i++) {\n\n        geometry.morphTargets[i] = {};\n        geometry.morphTargets[i].name = json.morphTargets[i].name;\n        geometry.morphTargets[i].vertices = [];\n\n        dstVertices = geometry.morphTargets[i].vertices;\n        srcVertices = json.morphTargets[i].vertices;\n\n        for (v = 0, vl = srcVertices.length; v < vl; v += 3) {\n\n          var vertex = new THREE.Vector3();\n          vertex.x = srcVertices[v] * scale;\n          vertex.y = srcVertices[v + 1] * scale;\n          vertex.z = srcVertices[v + 2] * scale;\n\n          dstVertices.push(vertex);\n\n        }\n\n      }\n\n    }\n\n    if (json.morphColors !== undefined) {\n\n      var i, l, c, cl, dstColors, srcColors, color;\n\n      for (i = 0, l = json.morphColors.length; i < l; i++) {\n\n        geometry.morphColors[i] = {};\n        geometry.morphColors[i].name = json.morphColors[i].name;\n        geometry.morphColors[i].colors = [];\n\n        dstColors = geometry.morphColors[i].colors;\n        srcColors = json.morphColors[i].colors;\n\n        for (c = 0, cl = srcColors.length; c < cl; c += 3) {\n\n          color = new THREE.Color(0xffaa00);\n          color.setRGB(srcColors[c], srcColors[c + 1], srcColors[c + 2]);\n          dstColors.push(color);\n\n        }\n\n      }\n\n    }\n\n  };\n\n  if (json.materials === undefined || json.materials.length === 0) {\n\n    return { geometry: geometry };\n\n  } else {\n\n    var materials = this.initMaterials(json.materials, texturePath);\n\n    if (this.needsTangents(materials)) {\n\n      geometry.computeTangents();\n\n    }\n\n    return { geometry: geometry, materials: materials };\n\n  }\n\n};\n\n// File:src/loaders/LoadingManager.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.LoadingManager = function (onLoad, onProgress, onError) {\n\n  var scope = this;\n\n  var loaded = 0,total = 0;\n\n  this.onLoad = onLoad;\n  this.onProgress = onProgress;\n  this.onError = onError;\n\n  this.itemStart = function (url) {\n\n    total++;\n\n  };\n\n  this.itemEnd = function (url) {\n\n    loaded++;\n\n    if (scope.onProgress !== undefined) {\n\n      scope.onProgress(url, loaded, total);\n\n    }\n\n    if (loaded === total && scope.onLoad !== undefined) {\n\n      scope.onLoad();\n\n    }\n\n  };\n\n};\n\nTHREE.DefaultLoadingManager = new THREE.LoadingManager();\n\n// File:src/loaders/BufferGeometryLoader.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.BufferGeometryLoader = function (manager) {\n\n  this.manager = manager !== undefined ? manager : THREE.DefaultLoadingManager;\n\n};\n\nTHREE.BufferGeometryLoader.prototype = {\n\n  constructor: THREE.BufferGeometryLoader,\n\n  load: function load(url, onLoad, onProgress, onError) {\n\n    var scope = this;\n\n    var loader = new THREE.XHRLoader(scope.manager);\n    loader.setCrossOrigin(this.crossOrigin);\n    loader.load(url, function (text) {\n\n      onLoad(scope.parse(JSON.parse(text)));\n\n    }, onProgress, onError);\n\n  },\n\n  setCrossOrigin: function setCrossOrigin(value) {\n\n    this.crossOrigin = value;\n\n  },\n\n  parse: function parse(json) {\n\n    var geometry = new THREE.BufferGeometry();\n\n    var attributes = json.data.attributes;\n\n    for (var key in attributes) {\n\n      var attribute = attributes[key];\n      var typedArray = new self[attribute.type](attribute.array);\n\n      geometry.addAttribute(key, new THREE.BufferAttribute(typedArray, attribute.itemSize));\n\n    }\n\n    var offsets = json.data.offsets;\n\n    if (offsets !== undefined) {\n\n      geometry.offsets = JSON.parse(JSON.stringify(offsets));\n\n    }\n\n    var boundingSphere = json.data.boundingSphere;\n\n    if (boundingSphere !== undefined) {\n\n      var center = new THREE.Vector3();\n\n      if (boundingSphere.center !== undefined) {\n\n        center.fromArray(boundingSphere.center);\n\n      }\n\n      geometry.boundingSphere = new THREE.Sphere(center, boundingSphere.radius);\n\n    }\n\n    return geometry;\n\n  } };\n\n\n\n// File:src/loaders/MaterialLoader.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.MaterialLoader = function (manager) {\n\n  this.manager = manager !== undefined ? manager : THREE.DefaultLoadingManager;\n\n};\n\nTHREE.MaterialLoader.prototype = {\n\n  constructor: THREE.MaterialLoader,\n\n  load: function load(url, onLoad, onProgress, onError) {\n\n    var scope = this;\n\n    var loader = new THREE.XHRLoader(scope.manager);\n    loader.setCrossOrigin(this.crossOrigin);\n    loader.load(url, function (text) {\n\n      onLoad(scope.parse(JSON.parse(text)));\n\n    }, onProgress, onError);\n\n  },\n\n  setCrossOrigin: function setCrossOrigin(value) {\n\n    this.crossOrigin = value;\n\n  },\n\n  parse: function parse(json) {\n\n    var material = new THREE[json.type]();\n\n    if (json.color !== undefined) material.color.setHex(json.color);\n    if (json.emissive !== undefined) material.emissive.setHex(json.emissive);\n    if (json.specular !== undefined) material.specular.setHex(json.specular);\n    if (json.shininess !== undefined) material.shininess = json.shininess;\n    if (json.uniforms !== undefined) material.uniforms = json.uniforms;\n    if (json.vertexShader !== undefined) material.vertexShader = json.vertexShader;\n    if (json.fragmentShader !== undefined) material.fragmentShader = json.fragmentShader;\n    if (json.vertexColors !== undefined) material.vertexColors = json.vertexColors;\n    if (json.shading !== undefined) material.shading = json.shading;\n    if (json.blending !== undefined) material.blending = json.blending;\n    if (json.side !== undefined) material.side = json.side;\n    if (json.opacity !== undefined) material.opacity = json.opacity;\n    if (json.transparent !== undefined) material.transparent = json.transparent;\n    if (json.wireframe !== undefined) material.wireframe = json.wireframe;\n\n    // for PointCloudMaterial\n    if (json.size !== undefined) material.size = json.size;\n    if (json.sizeAttenuation !== undefined) material.sizeAttenuation = json.sizeAttenuation;\n\n    if (json.materials !== undefined) {\n\n      for (var i = 0, l = json.materials.length; i < l; i++) {\n\n        material.materials.push(this.parse(json.materials[i]));\n\n      }\n\n    }\n\n    return material;\n\n  } };\n\n\n\n// File:src/loaders/ObjectLoader.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.ObjectLoader = function (manager) {\n\n  this.manager = manager !== undefined ? manager : THREE.DefaultLoadingManager;\n  this.texturePath = '';\n\n};\n\nTHREE.ObjectLoader.prototype = {\n\n  constructor: THREE.ObjectLoader,\n\n  load: function load(url, onLoad, onProgress, onError) {\n\n    if (this.texturePath === '') {\n\n      this.texturePath = url.substring(0, url.lastIndexOf('/') + 1);\n\n    }\n\n    var scope = this;\n\n    var loader = new THREE.XHRLoader(scope.manager);\n    loader.setCrossOrigin(this.crossOrigin);\n    loader.load(url, function (text) {\n\n      scope.parse(JSON.parse(text), onLoad);\n\n    }, onProgress, onError);\n\n  },\n\n  setTexturePath: function setTexturePath(value) {\n\n    this.texturePath = value;\n\n  },\n\n  setCrossOrigin: function setCrossOrigin(value) {\n\n    this.crossOrigin = value;\n\n  },\n\n  parse: function parse(json, onLoad) {\n\n    var geometries = this.parseGeometries(json.geometries);\n\n    var images = this.parseImages(json.images, function () {\n\n      if (onLoad !== undefined) onLoad(object);\n\n    });\n    var textures = this.parseTextures(json.textures, images);\n    var materials = this.parseMaterials(json.materials, textures);\n    var object = this.parseObject(json.object, geometries, materials);\n\n    if (json.images === undefined || json.images.length === 0) {\n\n      if (onLoad !== undefined) onLoad(object);\n\n    }\n\n    return object;\n\n  },\n\n  parseGeometries: function parseGeometries(json) {\n\n    var geometries = {};\n\n    if (json !== undefined) {\n\n      var geometryLoader = new THREE.JSONLoader();\n      var bufferGeometryLoader = new THREE.BufferGeometryLoader();\n\n      for (var i = 0, l = json.length; i < l; i++) {\n\n        var geometry;\n        var data = json[i];\n\n        switch (data.type) {\n\n          case 'PlaneGeometry':\n          case 'PlaneBufferGeometry':\n\n            geometry = new THREE[data.type](\n            data.width,\n            data.height,\n            data.widthSegments,\n            data.heightSegments);\n\n\n            break;\n\n          case 'BoxGeometry':\n          case 'CubeGeometry': // backwards compatible\n\n            geometry = new THREE.BoxGeometry(\n            data.width,\n            data.height,\n            data.depth,\n            data.widthSegments,\n            data.heightSegments,\n            data.depthSegments);\n\n\n            break;\n\n          case 'CircleGeometry':\n\n            geometry = new THREE.CircleGeometry(\n            data.radius,\n            data.segments);\n\n\n            break;\n\n          case 'CylinderGeometry':\n\n            geometry = new THREE.CylinderGeometry(\n            data.radiusTop,\n            data.radiusBottom,\n            data.height,\n            data.radialSegments,\n            data.heightSegments,\n            data.openEnded);\n\n\n            break;\n\n          case 'SphereGeometry':\n\n            geometry = new THREE.SphereGeometry(\n            data.radius,\n            data.widthSegments,\n            data.heightSegments,\n            data.phiStart,\n            data.phiLength,\n            data.thetaStart,\n            data.thetaLength);\n\n\n            break;\n\n          case 'IcosahedronGeometry':\n\n            geometry = new THREE.IcosahedronGeometry(\n            data.radius,\n            data.detail);\n\n\n            break;\n\n          case 'TorusGeometry':\n\n            geometry = new THREE.TorusGeometry(\n            data.radius,\n            data.tube,\n            data.radialSegments,\n            data.tubularSegments,\n            data.arc);\n\n\n            break;\n\n          case 'TorusKnotGeometry':\n\n            geometry = new THREE.TorusKnotGeometry(\n            data.radius,\n            data.tube,\n            data.radialSegments,\n            data.tubularSegments,\n            data.p,\n            data.q,\n            data.heightScale);\n\n\n            break;\n\n          case 'BufferGeometry':\n\n            geometry = bufferGeometryLoader.parse(data);\n\n            break;\n\n          case 'Geometry':\n\n            geometry = geometryLoader.parse(data.data).geometry;\n\n            break;}\n\n\n\n        geometry.uuid = data.uuid;\n\n        if (data.name !== undefined) geometry.name = data.name;\n\n        geometries[data.uuid] = geometry;\n\n      }\n\n    }\n\n    return geometries;\n\n  },\n\n  parseMaterials: function parseMaterials(json, textures) {\n\n    var materials = {};\n\n    if (json !== undefined) {\n\n      var getTexture = function getTexture(name) {\n\n        if (textures[name] === undefined) {\n\n          THREE.warn('THREE.ObjectLoader: Undefined texture', name);\n\n        }\n\n        return textures[name];\n\n      };\n\n      var loader = new THREE.MaterialLoader();\n\n      for (var i = 0, l = json.length; i < l; i++) {\n\n        var data = json[i];\n        var material = loader.parse(data);\n\n        material.uuid = data.uuid;\n\n        if (data.name !== undefined) material.name = data.name;\n\n        if (data.map !== undefined) {\n\n          material.map = getTexture(data.map);\n\n        }\n\n        if (data.bumpMap !== undefined) {\n\n          material.bumpMap = getTexture(data.bumpMap);\n          if (data.bumpScale) {\n            material.bumpScale = new THREE.Vector2(data.bumpScale, data.bumpScale);\n          }\n\n        }\n\n        if (data.alphaMap !== undefined) {\n\n          material.alphaMap = getTexture(data.alphaMap);\n\n        }\n\n        if (data.envMap !== undefined) {\n\n          material.envMap = getTexture(data.envMap);\n\n        }\n\n        if (data.normalMap !== undefined) {\n\n          material.normalMap = getTexture(data.normalMap);\n          if (data.normalScale) {\n            material.normalScale = new THREE.Vector2(data.normalScale, data.normalScale);\n          }\n\n        }\n\n        if (data.lightMap !== undefined) {\n\n          material.lightMap = getTexture(data.lightMap);\n\n        }\n\n        if (data.specularMap !== undefined) {\n\n          material.specularMap = getTexture(data.specularMap);\n\n        }\n\n        materials[data.uuid] = material;\n\n      }\n\n    }\n\n    return materials;\n\n  },\n\n  parseImages: function parseImages(json, onLoad) {\n\n    var scope = this;\n    var images = {};\n\n    if (json !== undefined && json.length > 0) {\n\n      var manager = new THREE.LoadingManager(onLoad);\n\n      var loader = new THREE.ImageLoader(manager);\n      loader.setCrossOrigin(this.crossOrigin);\n\n      var loadImage = function loadImage(url) {\n\n        scope.manager.itemStart(url);\n\n        return loader.load(url, function () {\n\n          scope.manager.itemEnd(url);\n\n        });\n\n      };\n\n      for (var i = 0, l = json.length; i < l; i++) {\n\n        var image = json[i];\n        var path = /^(\\/\\/)|([a-z]+:(\\/\\/)?)/i.test(image.url) ? image.url : scope.texturePath + image.url;\n\n        images[image.uuid] = loadImage(path);\n\n      }\n\n    }\n\n    return images;\n\n  },\n\n  parseTextures: function parseTextures(json, images) {\n\n    var textures = {};\n\n    if (json !== undefined) {\n\n      for (var i = 0, l = json.length; i < l; i++) {\n\n        var data = json[i];\n\n        if (data.image === undefined) {\n\n          THREE.warn('THREE.ObjectLoader: No \"image\" speficied for', data.uuid);\n\n        }\n\n        if (images[data.image] === undefined) {\n\n          THREE.warn('THREE.ObjectLoader: Undefined image', data.image);\n\n        }\n\n        var texture = new THREE.Texture(images[data.image]);\n        texture.needsUpdate = true;\n\n        texture.uuid = data.uuid;\n\n        if (data.name !== undefined) texture.name = data.name;\n        if (data.repeat !== undefined) texture.repeat = new THREE.Vector2(data.repeat[0], data.repeat[1]);\n        if (data.minFilter !== undefined) texture.minFilter = THREE[data.minFilter];\n        if (data.magFilter !== undefined) texture.magFilter = THREE[data.magFilter];\n        if (data.anisotropy !== undefined) texture.anisotropy = data.anisotropy;\n        if (data.wrap instanceof Array) {\n\n          texture.wrapS = THREE[data.wrap[0]];\n          texture.wrapT = THREE[data.wrap[1]];\n\n        }\n\n        textures[data.uuid] = texture;\n\n      }\n\n    }\n\n    return textures;\n\n  },\n\n  parseObject: function () {\n\n    var matrix = new THREE.Matrix4();\n\n    return function (data, geometries, materials) {\n\n      var object;\n\n      var getGeometry = function getGeometry(name) {\n\n        if (geometries[name] === undefined) {\n\n          THREE.warn('THREE.ObjectLoader: Undefined geometry', name);\n\n        }\n\n        return geometries[name];\n\n      };\n\n      var getMaterial = function getMaterial(name) {\n\n        if (materials[name] === undefined) {\n\n          THREE.warn('THREE.ObjectLoader: Undefined material', name);\n\n        }\n\n        return materials[name];\n\n      };\n\n      switch (data.type) {\n\n        case 'Scene':\n\n          object = new THREE.Scene();\n\n          break;\n\n        case 'PerspectiveCamera':\n\n          object = new THREE.PerspectiveCamera(data.fov, data.aspect, data.near, data.far);\n\n          break;\n\n        case 'OrthographicCamera':\n\n          object = new THREE.OrthographicCamera(data.left, data.right, data.top, data.bottom, data.near, data.far);\n\n          break;\n\n        case 'AmbientLight':\n\n          object = new THREE.AmbientLight(data.color);\n\n          break;\n\n        case 'DirectionalLight':\n\n          object = new THREE.DirectionalLight(data.color, data.intensity);\n\n          break;\n\n        case 'PointLight':\n\n          object = new THREE.PointLight(data.color, data.intensity, data.distance, data.decay);\n\n          break;\n\n        case 'SpotLight':\n\n          object = new THREE.SpotLight(data.color, data.intensity, data.distance, data.angle, data.exponent, data.decay);\n\n          break;\n\n        case 'HemisphereLight':\n\n          object = new THREE.HemisphereLight(data.color, data.groundColor, data.intensity);\n\n          break;\n\n        case 'Mesh':\n\n          object = new THREE.Mesh(getGeometry(data.geometry), getMaterial(data.material));\n\n          break;\n\n        case 'Line':\n\n          object = new THREE.Line(getGeometry(data.geometry), getMaterial(data.material), data.mode);\n\n          break;\n\n        case 'PointCloud':\n\n          object = new THREE.PointCloud(getGeometry(data.geometry), getMaterial(data.material));\n\n          break;\n\n        case 'Sprite':\n\n          object = new THREE.Sprite(getMaterial(data.material));\n\n          break;\n\n        case 'Group':\n\n          object = new THREE.Group();\n\n          break;\n\n        default:\n\n          object = new THREE.Object3D();}\n\n\n\n      object.uuid = data.uuid;\n\n      if (data.name !== undefined) object.name = data.name;\n      if (data.matrix !== undefined) {\n\n        matrix.fromArray(data.matrix);\n        matrix.decompose(object.position, object.quaternion, object.scale);\n\n      } else {\n\n        if (data.position !== undefined) object.position.fromArray(data.position);\n        if (data.rotation !== undefined) object.rotation.fromArray(data.rotation);\n        if (data.scale !== undefined) object.scale.fromArray(data.scale);\n\n      }\n\n      if (data.visible !== undefined) object.visible = data.visible;\n      if (data.userData !== undefined) object.userData = data.userData;\n\n      if (data.children !== undefined) {\n\n        for (var child in data.children) {\n\n          object.add(this.parseObject(data.children[child], geometries, materials));\n\n        }\n\n      }\n\n      return object;\n\n    };\n\n  }() };\n\n\n\n// File:src/loaders/TextureLoader.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.TextureLoader = function (manager) {\n\n  this.manager = manager !== undefined ? manager : THREE.DefaultLoadingManager;\n\n};\n\nTHREE.TextureLoader.prototype = {\n\n  constructor: THREE.TextureLoader,\n\n  load: function load(url, onLoad, onProgress, onError) {\n\n    var scope = this;\n\n    var loader = new THREE.ImageLoader(scope.manager);\n    loader.setCrossOrigin(this.crossOrigin);\n    loader.load(url, function (image) {\n\n      var texture = new THREE.Texture(image);\n      texture.needsUpdate = true;\n\n      if (onLoad !== undefined) {\n\n        onLoad(texture);\n\n      }\n\n    }, onProgress, onError);\n\n  },\n\n  setCrossOrigin: function setCrossOrigin(value) {\n\n    this.crossOrigin = value;\n\n  } };\n\n\n\n// File:src/loaders/BinaryTextureLoader.js\n\n/**\n * @author Nikos M. / https://github.com/foo123/\n *\n * Abstract Base class to load generic binary textures formats (rgbe, hdr, ...)\n */\n\nTHREE.DataTextureLoader = THREE.BinaryTextureLoader = function () {\n\n  // override in sub classes\n  this._parser = null;\n\n};\n\nTHREE.BinaryTextureLoader.prototype = {\n\n  constructor: THREE.BinaryTextureLoader,\n\n  load: function load(url, onLoad, onProgress, onError) {\n\n    var scope = this;\n\n    var texture = new THREE.DataTexture();\n\n    var loader = new THREE.XHRLoader();\n    loader.setResponseType('arraybuffer');\n\n    loader.load(url, function (buffer) {\n\n      var texData = scope._parser(buffer);\n\n      if (!texData) return;\n\n      if (undefined !== texData.image) {\n\n        texture.image = texData.image;\n\n      } else if (undefined !== texData.data) {\n\n        texture.image.width = texData.width;\n        texture.image.height = texData.height;\n        texture.image.data = texData.data;\n\n      }\n\n      texture.wrapS = undefined !== texData.wrapS ? texData.wrapS : THREE.ClampToEdgeWrapping;\n      texture.wrapT = undefined !== texData.wrapT ? texData.wrapT : THREE.ClampToEdgeWrapping;\n\n      texture.magFilter = undefined !== texData.magFilter ? texData.magFilter : THREE.LinearFilter;\n      texture.minFilter = undefined !== texData.minFilter ? texData.minFilter : THREE.LinearMipMapLinearFilter;\n\n      texture.anisotropy = undefined !== texData.anisotropy ? texData.anisotropy : 1;\n\n      if (undefined !== texData.format) {\n\n        texture.format = texData.format;\n\n      }\n      if (undefined !== texData.type) {\n\n        texture.type = texData.type;\n\n      }\n\n      if (undefined !== texData.mipmaps) {\n\n        texture.mipmaps = texData.mipmaps;\n\n      }\n\n      if (1 === texData.mipmapCount) {\n\n        texture.minFilter = THREE.LinearFilter;\n\n      }\n\n      texture.needsUpdate = true;\n\n      if (onLoad) onLoad(texture, texData);\n\n    }, onProgress, onError);\n\n\n    return texture;\n\n  } };\n\n\n\n// File:src/loaders/CompressedTextureLoader.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n *\n * Abstract Base class to block based textures loader (dds, pvr, ...)\n */\n\nTHREE.CompressedTextureLoader = function () {\n\n  // override in sub classes\n  this._parser = null;\n\n};\n\n\nTHREE.CompressedTextureLoader.prototype = {\n\n  constructor: THREE.CompressedTextureLoader,\n\n  load: function load(url, onLoad, onError) {\n\n    var scope = this;\n\n    var images = [];\n\n    var texture = new THREE.CompressedTexture();\n    texture.image = images;\n\n    var loader = new THREE.XHRLoader();\n    loader.setResponseType('arraybuffer');\n\n    if (url instanceof Array) {\n\n      var loaded = 0;\n\n      var loadTexture = function loadTexture(i) {\n\n        loader.load(url[i], function (buffer) {\n\n          var texDatas = scope._parser(buffer, true);\n\n          images[i] = {\n            width: texDatas.width,\n            height: texDatas.height,\n            format: texDatas.format,\n            mipmaps: texDatas.mipmaps };\n\n\n          loaded += 1;\n\n          if (loaded === 6) {\n\n            if (texDatas.mipmapCount == 1)\n            texture.minFilter = THREE.LinearFilter;\n\n            texture.format = texDatas.format;\n            texture.needsUpdate = true;\n\n            if (onLoad) onLoad(texture);\n\n          }\n\n        });\n\n      };\n\n      for (var i = 0, il = url.length; i < il; ++i) {\n\n        loadTexture(i);\n\n      }\n\n    } else {\n\n      // compressed cubemap texture stored in a single DDS file\n\n      loader.load(url, function (buffer) {\n\n        var texDatas = scope._parser(buffer, true);\n\n        if (texDatas.isCubemap) {\n\n          var faces = texDatas.mipmaps.length / texDatas.mipmapCount;\n\n          for (var f = 0; f < faces; f++) {\n\n            images[f] = { mipmaps: [] };\n\n            for (var i = 0; i < texDatas.mipmapCount; i++) {\n\n              images[f].mipmaps.push(texDatas.mipmaps[f * texDatas.mipmapCount + i]);\n              images[f].format = texDatas.format;\n              images[f].width = texDatas.width;\n              images[f].height = texDatas.height;\n\n            }\n\n          }\n\n        } else {\n\n          texture.image.width = texDatas.width;\n          texture.image.height = texDatas.height;\n          texture.mipmaps = texDatas.mipmaps;\n\n        }\n\n        if (texDatas.mipmapCount === 1) {\n\n          texture.minFilter = THREE.LinearFilter;\n\n        }\n\n        texture.format = texDatas.format;\n        texture.needsUpdate = true;\n\n        if (onLoad) onLoad(texture);\n\n      });\n\n    }\n\n    return texture;\n\n  } };\n\n\n\n// File:src/materials/Material.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.Material = function () {\n\n  Object.defineProperty(this, 'id', { value: THREE.MaterialIdCount++ });\n\n  this.uuid = THREE.Math.generateUUID();\n\n  this.name = '';\n  this.type = 'Material';\n\n  this.side = THREE.FrontSide;\n\n  this.opacity = 1;\n  this.transparent = false;\n\n  this.blending = THREE.NormalBlending;\n\n  this.blendSrc = THREE.SrcAlphaFactor;\n  this.blendDst = THREE.OneMinusSrcAlphaFactor;\n  this.blendEquation = THREE.AddEquation;\n  this.blendSrcAlpha = null;\n  this.blendDstAlpha = null;\n  this.blendEquationAlpha = null;\n\n  this.depthTest = true;\n  this.depthWrite = true;\n\n  this.colorWrite = true;\n\n  this.polygonOffset = false;\n  this.polygonOffsetFactor = 0;\n  this.polygonOffsetUnits = 0;\n\n  this.alphaTest = 0;\n\n  this.overdraw = 0; // Overdrawn pixels (typically between 0 and 1) for fixing antialiasing gaps in CanvasRenderer\n\n  this.visible = true;\n\n  this._needsUpdate = true;\n\n};\n\nTHREE.Material.prototype = {\n\n  constructor: THREE.Material,\n\n  get needsUpdate() {\n\n    return this._needsUpdate;\n\n  },\n\n  set needsUpdate(value) {\n\n    if (value === true) this.update();\n\n    this._needsUpdate = value;\n\n  },\n\n  setValues: function setValues(values) {\n\n    if (values === undefined) return;\n\n    for (var key in values) {\n\n      var newValue = values[key];\n\n      if (newValue === undefined) {\n\n        THREE.warn(\"THREE.Material: '\" + key + \"' parameter is undefined.\");\n        continue;\n\n      }\n\n      if (key in this) {\n\n        var currentValue = this[key];\n\n        if (currentValue instanceof THREE.Color) {\n\n          currentValue.set(newValue);\n\n        } else if (currentValue instanceof THREE.Vector3 && newValue instanceof THREE.Vector3) {\n\n          currentValue.copy(newValue);\n\n        } else if (key == 'overdraw') {\n\n          // ensure overdraw is backwards-compatable with legacy boolean type\n          this[key] = Number(newValue);\n\n        } else {\n\n          this[key] = newValue;\n\n        }\n\n      }\n\n    }\n\n  },\n\n  toJSON: function toJSON() {\n\n    var output = {\n      metadata: {\n        version: 4.2,\n        type: 'material',\n        generator: 'MaterialExporter' },\n\n      uuid: this.uuid,\n      type: this.type };\n\n\n    if (this.name !== \"\") output.name = this.name;\n\n    if (this instanceof THREE.MeshBasicMaterial) {\n\n      output.color = this.color.getHex();\n      if (this.vertexColors !== THREE.NoColors) output.vertexColors = this.vertexColors;\n      if (this.blending !== THREE.NormalBlending) output.blending = this.blending;\n      if (this.side !== THREE.FrontSide) output.side = this.side;\n\n    } else if (this instanceof THREE.MeshLambertMaterial) {\n\n      output.color = this.color.getHex();\n      output.emissive = this.emissive.getHex();\n      if (this.vertexColors !== THREE.NoColors) output.vertexColors = this.vertexColors;\n      if (this.shading !== THREE.SmoothShading) output.shading = this.shading;\n      if (this.blending !== THREE.NormalBlending) output.blending = this.blending;\n      if (this.side !== THREE.FrontSide) output.side = this.side;\n\n    } else if (this instanceof THREE.MeshPhongMaterial) {\n\n      output.color = this.color.getHex();\n      output.emissive = this.emissive.getHex();\n      output.specular = this.specular.getHex();\n      output.shininess = this.shininess;\n      if (this.vertexColors !== THREE.NoColors) output.vertexColors = this.vertexColors;\n      if (this.shading !== THREE.SmoothShading) output.shading = this.shading;\n      if (this.blending !== THREE.NormalBlending) output.blending = this.blending;\n      if (this.side !== THREE.FrontSide) output.side = this.side;\n\n    } else if (this instanceof THREE.MeshNormalMaterial) {\n\n      if (this.blending !== THREE.NormalBlending) output.blending = this.blending;\n      if (this.side !== THREE.FrontSide) output.side = this.side;\n\n    } else if (this instanceof THREE.MeshDepthMaterial) {\n\n      if (this.blending !== THREE.NormalBlending) output.blending = this.blending;\n      if (this.side !== THREE.FrontSide) output.side = this.side;\n\n    } else if (this instanceof THREE.PointCloudMaterial) {\n\n      output.size = this.size;\n      output.sizeAttenuation = this.sizeAttenuation;\n      output.color = this.color.getHex();\n\n      if (this.vertexColors !== THREE.NoColors) output.vertexColors = this.vertexColors;\n      if (this.blending !== THREE.NormalBlending) output.blending = this.blending;\n\n    } else if (this instanceof THREE.ShaderMaterial) {\n\n      output.uniforms = this.uniforms;\n      output.vertexShader = this.vertexShader;\n      output.fragmentShader = this.fragmentShader;\n\n    } else if (this instanceof THREE.SpriteMaterial) {\n\n      output.color = this.color.getHex();\n\n    }\n\n    if (this.opacity < 1) output.opacity = this.opacity;\n    if (this.transparent !== false) output.transparent = this.transparent;\n    if (this.wireframe !== false) output.wireframe = this.wireframe;\n\n    return output;\n\n  },\n\n  clone: function clone(material) {\n\n    if (material === undefined) material = new THREE.Material();\n\n    material.name = this.name;\n\n    material.side = this.side;\n\n    material.opacity = this.opacity;\n    material.transparent = this.transparent;\n\n    material.blending = this.blending;\n\n    material.blendSrc = this.blendSrc;\n    material.blendDst = this.blendDst;\n    material.blendEquation = this.blendEquation;\n    material.blendSrcAlpha = this.blendSrcAlpha;\n    material.blendDstAlpha = this.blendDstAlpha;\n    material.blendEquationAlpha = this.blendEquationAlpha;\n\n    material.depthTest = this.depthTest;\n    material.depthWrite = this.depthWrite;\n\n    material.polygonOffset = this.polygonOffset;\n    material.polygonOffsetFactor = this.polygonOffsetFactor;\n    material.polygonOffsetUnits = this.polygonOffsetUnits;\n\n    material.alphaTest = this.alphaTest;\n\n    material.overdraw = this.overdraw;\n\n    material.visible = this.visible;\n\n    return material;\n\n  },\n\n  update: function update() {\n\n    this.dispatchEvent({ type: 'update' });\n\n  },\n\n  dispose: function dispose() {\n\n    this.dispatchEvent({ type: 'dispose' });\n\n  } };\n\n\n\nTHREE.EventDispatcher.prototype.apply(THREE.Material.prototype);\n\nTHREE.MaterialIdCount = 0;\n\n// File:src/materials/LineBasicMaterial.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n *\n * parameters = {\n *  color: <hex>,\n *  opacity: <float>,\n *\n *  blending: THREE.NormalBlending,\n *  depthTest: <bool>,\n *  depthWrite: <bool>,\n *\n *  linewidth: <float>,\n *  linecap: \"round\",\n *  linejoin: \"round\",\n *\n *  vertexColors: <bool>\n *\n *  fog: <bool>\n * }\n */\n\nTHREE.LineBasicMaterial = function (parameters) {\n\n  THREE.Material.call(this);\n\n  this.type = 'LineBasicMaterial';\n\n  this.color = new THREE.Color(0xffffff);\n\n  this.linewidth = 1;\n  this.linecap = 'round';\n  this.linejoin = 'round';\n\n  this.vertexColors = THREE.NoColors;\n\n  this.fog = true;\n\n  this.setValues(parameters);\n\n};\n\nTHREE.LineBasicMaterial.prototype = Object.create(THREE.Material.prototype);\nTHREE.LineBasicMaterial.prototype.constructor = THREE.LineBasicMaterial;\n\nTHREE.LineBasicMaterial.prototype.clone = function () {\n\n  var material = new THREE.LineBasicMaterial();\n\n  THREE.Material.prototype.clone.call(this, material);\n\n  material.color.copy(this.color);\n\n  material.linewidth = this.linewidth;\n  material.linecap = this.linecap;\n  material.linejoin = this.linejoin;\n\n  material.vertexColors = this.vertexColors;\n\n  material.fog = this.fog;\n\n  return material;\n\n};\n\n// File:src/materials/LineDashedMaterial.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n *\n * parameters = {\n *  color: <hex>,\n *  opacity: <float>,\n *\n *  blending: THREE.NormalBlending,\n *  depthTest: <bool>,\n *  depthWrite: <bool>,\n *\n *  linewidth: <float>,\n *\n *  scale: <float>,\n *  dashSize: <float>,\n *  gapSize: <float>,\n *\n *  vertexColors: <bool>\n *\n *  fog: <bool>\n * }\n */\n\nTHREE.LineDashedMaterial = function (parameters) {\n\n  THREE.Material.call(this);\n\n  this.type = 'LineDashedMaterial';\n\n  this.color = new THREE.Color(0xffffff);\n\n  this.linewidth = 1;\n\n  this.scale = 1;\n  this.dashSize = 3;\n  this.gapSize = 1;\n\n  this.vertexColors = false;\n\n  this.fog = true;\n\n  this.setValues(parameters);\n\n};\n\nTHREE.LineDashedMaterial.prototype = Object.create(THREE.Material.prototype);\nTHREE.LineDashedMaterial.prototype.constructor = THREE.LineDashedMaterial;\n\nTHREE.LineDashedMaterial.prototype.clone = function () {\n\n  var material = new THREE.LineDashedMaterial();\n\n  THREE.Material.prototype.clone.call(this, material);\n\n  material.color.copy(this.color);\n\n  material.linewidth = this.linewidth;\n\n  material.scale = this.scale;\n  material.dashSize = this.dashSize;\n  material.gapSize = this.gapSize;\n\n  material.vertexColors = this.vertexColors;\n\n  material.fog = this.fog;\n\n  return material;\n\n};\n\n// File:src/materials/MeshBasicMaterial.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n *\n * parameters = {\n *  color: <hex>,\n *  opacity: <float>,\n *  map: new THREE.Texture( <Image> ),\n *\n *  lightMap: new THREE.Texture( <Image> ),\n *\n *  specularMap: new THREE.Texture( <Image> ),\n *\n *  alphaMap: new THREE.Texture( <Image> ),\n *\n *  envMap: new THREE.TextureCube( [posx, negx, posy, negy, posz, negz] ),\n *  combine: THREE.Multiply,\n *  reflectivity: <float>,\n *  refractionRatio: <float>,\n *\n *  shading: THREE.SmoothShading,\n *  blending: THREE.NormalBlending,\n *  depthTest: <bool>,\n *  depthWrite: <bool>,\n *\n *  wireframe: <boolean>,\n *  wireframeLinewidth: <float>,\n *\n *  vertexColors: THREE.NoColors / THREE.VertexColors / THREE.FaceColors,\n *\n *  skinning: <bool>,\n *  morphTargets: <bool>,\n *\n *  fog: <bool>\n * }\n */\n\nTHREE.MeshBasicMaterial = function (parameters) {\n\n  THREE.Material.call(this);\n\n  this.type = 'MeshBasicMaterial';\n\n  this.color = new THREE.Color(0xffffff); // emissive\n\n  this.map = null;\n\n  this.lightMap = null;\n\n  this.specularMap = null;\n\n  this.alphaMap = null;\n\n  this.envMap = null;\n  this.combine = THREE.MultiplyOperation;\n  this.reflectivity = 1;\n  this.refractionRatio = 0.98;\n\n  this.fog = true;\n\n  this.shading = THREE.SmoothShading;\n\n  this.wireframe = false;\n  this.wireframeLinewidth = 1;\n  this.wireframeLinecap = 'round';\n  this.wireframeLinejoin = 'round';\n\n  this.vertexColors = THREE.NoColors;\n\n  this.skinning = false;\n  this.morphTargets = false;\n\n  this.setValues(parameters);\n\n};\n\nTHREE.MeshBasicMaterial.prototype = Object.create(THREE.Material.prototype);\nTHREE.MeshBasicMaterial.prototype.constructor = THREE.MeshBasicMaterial;\n\nTHREE.MeshBasicMaterial.prototype.clone = function () {\n\n  var material = new THREE.MeshBasicMaterial();\n\n  THREE.Material.prototype.clone.call(this, material);\n\n  material.color.copy(this.color);\n\n  material.map = this.map;\n\n  material.lightMap = this.lightMap;\n\n  material.specularMap = this.specularMap;\n\n  material.alphaMap = this.alphaMap;\n\n  material.envMap = this.envMap;\n  material.combine = this.combine;\n  material.reflectivity = this.reflectivity;\n  material.refractionRatio = this.refractionRatio;\n\n  material.fog = this.fog;\n\n  material.shading = this.shading;\n\n  material.wireframe = this.wireframe;\n  material.wireframeLinewidth = this.wireframeLinewidth;\n  material.wireframeLinecap = this.wireframeLinecap;\n  material.wireframeLinejoin = this.wireframeLinejoin;\n\n  material.vertexColors = this.vertexColors;\n\n  material.skinning = this.skinning;\n  material.morphTargets = this.morphTargets;\n\n  return material;\n\n};\n\n// File:src/materials/MeshLambertMaterial.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n *\n * parameters = {\n *  color: <hex>,\n *  emissive: <hex>,\n *  opacity: <float>,\n *\n *  map: new THREE.Texture( <Image> ),\n *\n *  lightMap: new THREE.Texture( <Image> ),\n *\n *  specularMap: new THREE.Texture( <Image> ),\n *\n *  alphaMap: new THREE.Texture( <Image> ),\n *\n *  envMap: new THREE.TextureCube( [posx, negx, posy, negy, posz, negz] ),\n *  combine: THREE.Multiply,\n *  reflectivity: <float>,\n *  refractionRatio: <float>,\n *\n *  shading: THREE.SmoothShading,\n *  blending: THREE.NormalBlending,\n *  depthTest: <bool>,\n *  depthWrite: <bool>,\n *\n *  wireframe: <boolean>,\n *  wireframeLinewidth: <float>,\n *\n *  vertexColors: THREE.NoColors / THREE.VertexColors / THREE.FaceColors,\n *\n *  skinning: <bool>,\n *  morphTargets: <bool>,\n *  morphNormals: <bool>,\n *\n *\tfog: <bool>\n * }\n */\n\nTHREE.MeshLambertMaterial = function (parameters) {\n\n  THREE.Material.call(this);\n\n  this.type = 'MeshLambertMaterial';\n\n  this.color = new THREE.Color(0xffffff); // diffuse\n  this.emissive = new THREE.Color(0x000000);\n\n  this.wrapAround = false;\n  this.wrapRGB = new THREE.Vector3(1, 1, 1);\n\n  this.map = null;\n\n  this.lightMap = null;\n\n  this.specularMap = null;\n\n  this.alphaMap = null;\n\n  this.envMap = null;\n  this.combine = THREE.MultiplyOperation;\n  this.reflectivity = 1;\n  this.refractionRatio = 0.98;\n\n  this.fog = true;\n\n  this.shading = THREE.SmoothShading;\n\n  this.wireframe = false;\n  this.wireframeLinewidth = 1;\n  this.wireframeLinecap = 'round';\n  this.wireframeLinejoin = 'round';\n\n  this.vertexColors = THREE.NoColors;\n\n  this.skinning = false;\n  this.morphTargets = false;\n  this.morphNormals = false;\n\n  this.setValues(parameters);\n\n};\n\nTHREE.MeshLambertMaterial.prototype = Object.create(THREE.Material.prototype);\nTHREE.MeshLambertMaterial.prototype.constructor = THREE.MeshLambertMaterial;\n\nTHREE.MeshLambertMaterial.prototype.clone = function () {\n\n  var material = new THREE.MeshLambertMaterial();\n\n  THREE.Material.prototype.clone.call(this, material);\n\n  material.color.copy(this.color);\n  material.emissive.copy(this.emissive);\n\n  material.wrapAround = this.wrapAround;\n  material.wrapRGB.copy(this.wrapRGB);\n\n  material.map = this.map;\n\n  material.lightMap = this.lightMap;\n\n  material.specularMap = this.specularMap;\n\n  material.alphaMap = this.alphaMap;\n\n  material.envMap = this.envMap;\n  material.combine = this.combine;\n  material.reflectivity = this.reflectivity;\n  material.refractionRatio = this.refractionRatio;\n\n  material.fog = this.fog;\n\n  material.shading = this.shading;\n\n  material.wireframe = this.wireframe;\n  material.wireframeLinewidth = this.wireframeLinewidth;\n  material.wireframeLinecap = this.wireframeLinecap;\n  material.wireframeLinejoin = this.wireframeLinejoin;\n\n  material.vertexColors = this.vertexColors;\n\n  material.skinning = this.skinning;\n  material.morphTargets = this.morphTargets;\n  material.morphNormals = this.morphNormals;\n\n  return material;\n\n};\n\n// File:src/materials/MeshPhongMaterial.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n *\n * parameters = {\n *  color: <hex>,\n *  emissive: <hex>,\n *  specular: <hex>,\n *  shininess: <float>,\n *  opacity: <float>,\n *\n *  map: new THREE.Texture( <Image> ),\n *\n *  lightMap: new THREE.Texture( <Image> ),\n *\n *  bumpMap: new THREE.Texture( <Image> ),\n *  bumpScale: <float>,\n *\n *  normalMap: new THREE.Texture( <Image> ),\n *  normalScale: <Vector2>,\n *\n *  specularMap: new THREE.Texture( <Image> ),\n *\n *  alphaMap: new THREE.Texture( <Image> ),\n *\n *  envMap: new THREE.TextureCube( [posx, negx, posy, negy, posz, negz] ),\n *  combine: THREE.Multiply,\n *  reflectivity: <float>,\n *  refractionRatio: <float>,\n *\n *  shading: THREE.SmoothShading,\n *  blending: THREE.NormalBlending,\n *  depthTest: <bool>,\n *  depthWrite: <bool>,\n *\n *  wireframe: <boolean>,\n *  wireframeLinewidth: <float>,\n *\n *  vertexColors: THREE.NoColors / THREE.VertexColors / THREE.FaceColors,\n *\n *  skinning: <bool>,\n *  morphTargets: <bool>,\n *  morphNormals: <bool>,\n *\n *\tfog: <bool>\n * }\n */\n\nTHREE.MeshPhongMaterial = function (parameters) {\n\n  THREE.Material.call(this);\n\n  this.type = 'MeshPhongMaterial';\n\n  this.color = new THREE.Color(0xffffff); // diffuse\n  this.emissive = new THREE.Color(0x000000);\n  this.specular = new THREE.Color(0x111111);\n  this.shininess = 30;\n\n  this.metal = false;\n\n  this.wrapAround = false;\n  this.wrapRGB = new THREE.Vector3(1, 1, 1);\n\n  this.map = null;\n\n  this.lightMap = null;\n\n  this.bumpMap = null;\n  this.bumpScale = 1;\n\n  this.normalMap = null;\n  this.normalScale = new THREE.Vector2(1, 1);\n\n  this.specularMap = null;\n\n  this.alphaMap = null;\n\n  this.envMap = null;\n  this.combine = THREE.MultiplyOperation;\n  this.reflectivity = 1;\n  this.refractionRatio = 0.98;\n\n  this.fog = true;\n\n  this.shading = THREE.SmoothShading;\n\n  this.wireframe = false;\n  this.wireframeLinewidth = 1;\n  this.wireframeLinecap = 'round';\n  this.wireframeLinejoin = 'round';\n\n  this.vertexColors = THREE.NoColors;\n\n  this.skinning = false;\n  this.morphTargets = false;\n  this.morphNormals = false;\n\n  this.setValues(parameters);\n\n};\n\nTHREE.MeshPhongMaterial.prototype = Object.create(THREE.Material.prototype);\nTHREE.MeshPhongMaterial.prototype.constructor = THREE.MeshPhongMaterial;\n\nTHREE.MeshPhongMaterial.prototype.clone = function () {\n\n  var material = new THREE.MeshPhongMaterial();\n\n  THREE.Material.prototype.clone.call(this, material);\n\n  material.color.copy(this.color);\n  material.emissive.copy(this.emissive);\n  material.specular.copy(this.specular);\n  material.shininess = this.shininess;\n\n  material.metal = this.metal;\n\n  material.wrapAround = this.wrapAround;\n  material.wrapRGB.copy(this.wrapRGB);\n\n  material.map = this.map;\n\n  material.lightMap = this.lightMap;\n\n  material.bumpMap = this.bumpMap;\n  material.bumpScale = this.bumpScale;\n\n  material.normalMap = this.normalMap;\n  material.normalScale.copy(this.normalScale);\n\n  material.specularMap = this.specularMap;\n\n  material.alphaMap = this.alphaMap;\n\n  material.envMap = this.envMap;\n  material.combine = this.combine;\n  material.reflectivity = this.reflectivity;\n  material.refractionRatio = this.refractionRatio;\n\n  material.fog = this.fog;\n\n  material.shading = this.shading;\n\n  material.wireframe = this.wireframe;\n  material.wireframeLinewidth = this.wireframeLinewidth;\n  material.wireframeLinecap = this.wireframeLinecap;\n  material.wireframeLinejoin = this.wireframeLinejoin;\n\n  material.vertexColors = this.vertexColors;\n\n  material.skinning = this.skinning;\n  material.morphTargets = this.morphTargets;\n  material.morphNormals = this.morphNormals;\n\n  return material;\n\n};\n\n// File:src/materials/MeshDepthMaterial.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n *\n * parameters = {\n *  opacity: <float>,\n *\n *  blending: THREE.NormalBlending,\n *  depthTest: <bool>,\n *  depthWrite: <bool>,\n *\n *  wireframe: <boolean>,\n *  wireframeLinewidth: <float>\n * }\n */\n\nTHREE.MeshDepthMaterial = function (parameters) {\n\n  THREE.Material.call(this);\n\n  this.type = 'MeshDepthMaterial';\n\n  this.morphTargets = false;\n  this.wireframe = false;\n  this.wireframeLinewidth = 1;\n\n  this.setValues(parameters);\n\n};\n\nTHREE.MeshDepthMaterial.prototype = Object.create(THREE.Material.prototype);\nTHREE.MeshDepthMaterial.prototype.constructor = THREE.MeshDepthMaterial;\n\nTHREE.MeshDepthMaterial.prototype.clone = function () {\n\n  var material = new THREE.MeshDepthMaterial();\n\n  THREE.Material.prototype.clone.call(this, material);\n\n  material.wireframe = this.wireframe;\n  material.wireframeLinewidth = this.wireframeLinewidth;\n\n  return material;\n\n};\n\n// File:src/materials/MeshNormalMaterial.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n *\n * parameters = {\n *  opacity: <float>,\n *\n *  shading: THREE.FlatShading,\n *  blending: THREE.NormalBlending,\n *  depthTest: <bool>,\n *  depthWrite: <bool>,\n *\n *  wireframe: <boolean>,\n *  wireframeLinewidth: <float>\n * }\n */\n\nTHREE.MeshNormalMaterial = function (parameters) {\n\n  THREE.Material.call(this, parameters);\n\n  this.type = 'MeshNormalMaterial';\n\n  this.wireframe = false;\n  this.wireframeLinewidth = 1;\n\n  this.morphTargets = false;\n\n  this.setValues(parameters);\n\n};\n\nTHREE.MeshNormalMaterial.prototype = Object.create(THREE.Material.prototype);\nTHREE.MeshNormalMaterial.prototype.constructor = THREE.MeshNormalMaterial;\n\nTHREE.MeshNormalMaterial.prototype.clone = function () {\n\n  var material = new THREE.MeshNormalMaterial();\n\n  THREE.Material.prototype.clone.call(this, material);\n\n  material.wireframe = this.wireframe;\n  material.wireframeLinewidth = this.wireframeLinewidth;\n\n  return material;\n\n};\n\n// File:src/materials/MeshFaceMaterial.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.MeshFaceMaterial = function (materials) {\n\n  this.uuid = THREE.Math.generateUUID();\n\n  this.type = 'MeshFaceMaterial';\n\n  this.materials = materials instanceof Array ? materials : [];\n\n};\n\nTHREE.MeshFaceMaterial.prototype = {\n\n  constructor: THREE.MeshFaceMaterial,\n\n  toJSON: function toJSON() {\n\n    var output = {\n      metadata: {\n        version: 4.2,\n        type: 'material',\n        generator: 'MaterialExporter' },\n\n      uuid: this.uuid,\n      type: this.type,\n      materials: [] };\n\n\n    for (var i = 0, l = this.materials.length; i < l; i++) {\n\n      output.materials.push(this.materials[i].toJSON());\n\n    }\n\n    return output;\n\n  },\n\n  clone: function clone() {\n\n    var material = new THREE.MeshFaceMaterial();\n\n    for (var i = 0; i < this.materials.length; i++) {\n\n      material.materials.push(this.materials[i].clone());\n\n    }\n\n    return material;\n\n  } };\n\n\n\n// File:src/materials/PointCloudMaterial.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n *\n * parameters = {\n *  color: <hex>,\n *  opacity: <float>,\n *  map: new THREE.Texture( <Image> ),\n *\n *  size: <float>,\n *  sizeAttenuation: <bool>,\n *\n *  blending: THREE.NormalBlending,\n *  depthTest: <bool>,\n *  depthWrite: <bool>,\n *\n *  vertexColors: <bool>,\n *\n *  fog: <bool>\n * }\n */\n\nTHREE.PointCloudMaterial = function (parameters) {\n\n  THREE.Material.call(this);\n\n  this.type = 'PointCloudMaterial';\n\n  this.color = new THREE.Color(0xffffff);\n\n  this.map = null;\n\n  this.size = 1;\n  this.sizeAttenuation = true;\n\n  this.vertexColors = THREE.NoColors;\n\n  this.fog = true;\n\n  this.setValues(parameters);\n\n};\n\nTHREE.PointCloudMaterial.prototype = Object.create(THREE.Material.prototype);\nTHREE.PointCloudMaterial.prototype.constructor = THREE.PointCloudMaterial;\n\nTHREE.PointCloudMaterial.prototype.clone = function () {\n\n  var material = new THREE.PointCloudMaterial();\n\n  THREE.Material.prototype.clone.call(this, material);\n\n  material.color.copy(this.color);\n\n  material.map = this.map;\n  if (this.defines) {\n    material.defines = Object.assign({}, this.defines);\n  }\n\n\n  material.size = this.size;\n  material.sizeAttenuation = this.sizeAttenuation;\n\n  material.vertexColors = this.vertexColors;\n\n  material.fog = this.fog;\n\n  return material;\n\n};\n\n// backwards compatibility\n\nTHREE.ParticleBasicMaterial = function (parameters) {\n\n  THREE.warn('THREE.ParticleBasicMaterial has been renamed to THREE.PointCloudMaterial.');\n  return new THREE.PointCloudMaterial(parameters);\n\n};\n\nTHREE.ParticleSystemMaterial = function (parameters) {\n\n  THREE.warn('THREE.ParticleSystemMaterial has been renamed to THREE.PointCloudMaterial.');\n  return new THREE.PointCloudMaterial(parameters);\n\n};\n\n// File:src/materials/ShaderMaterial.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n *\n * parameters = {\n *  defines: { \"label\" : \"value\" },\n *  uniforms: { \"parameter1\": { type: \"f\", value: 1.0 }, \"parameter2\": { type: \"i\" value2: 2 } },\n *\n *  fragmentShader: <string>,\n *  vertexShader: <string>,\n *\n *  shading: THREE.SmoothShading,\n *  blending: THREE.NormalBlending,\n *  depthTest: <bool>,\n *  depthWrite: <bool>,\n *\n *  wireframe: <boolean>,\n *  wireframeLinewidth: <float>,\n *\n *  lights: <bool>,\n *\n *  vertexColors: THREE.NoColors / THREE.VertexColors / THREE.FaceColors,\n *\n *  skinning: <bool>,\n *  morphTargets: <bool>,\n *  morphNormals: <bool>,\n *\n *\tfog: <bool>\n * }\n */\n\nTHREE.ShaderMaterial = function (parameters) {\n\n  THREE.Material.call(this);\n\n  this.type = 'ShaderMaterial';\n\n  this.defines = {};\n  this.uniforms = {};\n  this.attributes = null;\n\n  this.vertexShader = 'void main() {\\n\\tgl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\\n}';\n  this.fragmentShader = 'void main() {\\n\\tgl_FragColor = vec4( 1.0, 0.0, 0.0, 1.0 );\\n}';\n\n  this.shading = THREE.SmoothShading;\n\n  this.linewidth = 1;\n\n  this.wireframe = false;\n  this.wireframeLinewidth = 1;\n\n  this.fog = false; // set to use scene fog\n\n  this.lights = false; // set to use scene lights\n\n  this.vertexColors = THREE.NoColors; // set to use \"color\" attribute stream\n\n  this.skinning = false; // set to use skinning attribute streams\n\n  this.morphTargets = false; // set to use morph targets\n  this.morphNormals = false; // set to use morph normals\n\n  // When rendered geometry doesn't include these attributes but the material does,\n  // use these default values in WebGL. This avoids errors when buffer data is missing.\n  this.defaultAttributeValues = {\n    'color': [1, 1, 1],\n    'uv': [0, 0],\n    'uv2': [0, 0] };\n\n\n  this.index0AttributeName = undefined;\n\n  this.setValues(parameters);\n\n};\n\nTHREE.ShaderMaterial.prototype = Object.create(THREE.Material.prototype);\nTHREE.ShaderMaterial.prototype.constructor = THREE.ShaderMaterial;\n\nTHREE.ShaderMaterial.prototype.clone = function () {\n\n  var material = new THREE.ShaderMaterial();\n\n  THREE.Material.prototype.clone.call(this, material);\n\n  material.fragmentShader = this.fragmentShader;\n  material.vertexShader = this.vertexShader;\n\n  material.uniforms = THREE.UniformsUtils.clone(this.uniforms);\n\n  material.attributes = this.attributes;\n  material.defines = this.defines;\n\n  material.shading = this.shading;\n\n  material.wireframe = this.wireframe;\n  material.wireframeLinewidth = this.wireframeLinewidth;\n\n  material.fog = this.fog;\n\n  material.lights = this.lights;\n\n  material.vertexColors = this.vertexColors;\n\n  material.skinning = this.skinning;\n\n  material.morphTargets = this.morphTargets;\n  material.morphNormals = this.morphNormals;\n\n  return material;\n\n};\n\n// File:src/materials/RawShaderMaterial.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.RawShaderMaterial = function (parameters) {\n\n  THREE.ShaderMaterial.call(this, parameters);\n\n  this.type = 'RawShaderMaterial';\n\n};\n\nTHREE.RawShaderMaterial.prototype = Object.create(THREE.ShaderMaterial.prototype);\nTHREE.RawShaderMaterial.prototype.constructor = THREE.RawShaderMaterial;\n\nTHREE.RawShaderMaterial.prototype.clone = function () {\n\n  var material = new THREE.RawShaderMaterial();\n\n  THREE.ShaderMaterial.prototype.clone.call(this, material);\n\n  return material;\n\n};\n\n// File:src/materials/SpriteMaterial.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n *\n * parameters = {\n *  color: <hex>,\n *  opacity: <float>,\n *  map: new THREE.Texture( <Image> ),\n *\n *  blending: THREE.NormalBlending,\n *  depthTest: <bool>,\n *  depthWrite: <bool>,\n *\n *\tuvOffset: new THREE.Vector2(),\n *\tuvScale: new THREE.Vector2(),\n *\n *  fog: <bool>\n * }\n */\n\nTHREE.SpriteMaterial = function (parameters) {\n\n  THREE.Material.call(this);\n\n  this.type = 'SpriteMaterial';\n\n  this.color = new THREE.Color(0xffffff);\n  this.map = null;\n\n  this.rotation = 0;\n\n  this.fog = false;\n\n  // set parameters\n\n  this.setValues(parameters);\n\n};\n\nTHREE.SpriteMaterial.prototype = Object.create(THREE.Material.prototype);\nTHREE.SpriteMaterial.prototype.constructor = THREE.SpriteMaterial;\n\nTHREE.SpriteMaterial.prototype.clone = function () {\n\n  var material = new THREE.SpriteMaterial();\n\n  THREE.Material.prototype.clone.call(this, material);\n\n  material.color.copy(this.color);\n  material.map = this.map;\n\n  material.rotation = this.rotation;\n\n  material.fog = this.fog;\n\n  return material;\n\n};\n\n// File:src/textures/Texture.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n * @author szimek / https://github.com/szimek/\n */\n\nTHREE.Texture = function (image, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy) {\n\n  Object.defineProperty(this, 'id', { value: THREE.TextureIdCount++ });\n\n  this.uuid = THREE.Math.generateUUID();\n\n  this.name = '';\n  this.sourceFile = '';\n\n  this.image = image !== undefined ? image : THREE.Texture.DEFAULT_IMAGE;\n  this.mipmaps = [];\n\n  this.mapping = mapping !== undefined ? mapping : THREE.Texture.DEFAULT_MAPPING;\n\n  this.wrapS = wrapS !== undefined ? wrapS : THREE.ClampToEdgeWrapping;\n  this.wrapT = wrapT !== undefined ? wrapT : THREE.ClampToEdgeWrapping;\n\n  this.magFilter = magFilter !== undefined ? magFilter : THREE.LinearFilter;\n  this.minFilter = minFilter !== undefined ? minFilter : THREE.LinearMipMapLinearFilter;\n\n  this.anisotropy = anisotropy !== undefined ? anisotropy : 1;\n\n  this.format = format !== undefined ? format : THREE.RGBAFormat;\n  this.type = type !== undefined ? type : THREE.UnsignedByteType;\n\n  this.offset = new THREE.Vector2(0, 0);\n  this.repeat = new THREE.Vector2(1, 1);\n\n  this.generateMipmaps = true;\n  this.premultiplyAlpha = false;\n  this.flipY = true;\n  this.unpackAlignment = 4; // valid values: 1, 2, 4, 8 (see http://www.khronos.org/opengles/sdk/docs/man/xhtml/glPixelStorei.xml)\n\n  this._needsUpdate = false;\n  this.onUpdate = null;\n\n};\n\nTHREE.Texture.DEFAULT_IMAGE = undefined;\nTHREE.Texture.DEFAULT_MAPPING = THREE.UVMapping;\n\nTHREE.Texture.prototype = {\n\n  constructor: THREE.Texture,\n\n  get needsUpdate() {\n\n    return this._needsUpdate;\n\n  },\n\n  set needsUpdate(value) {\n\n    if (value === true) this.update();\n\n    this._needsUpdate = value;\n\n  },\n\n  clone: function clone(texture) {\n\n    if (texture === undefined) texture = new THREE.Texture();\n\n    texture.image = this.image;\n    texture.mipmaps = this.mipmaps.slice(0);\n\n    texture.mapping = this.mapping;\n\n    texture.wrapS = this.wrapS;\n    texture.wrapT = this.wrapT;\n\n    texture.magFilter = this.magFilter;\n    texture.minFilter = this.minFilter;\n\n    texture.anisotropy = this.anisotropy;\n\n    texture.format = this.format;\n    texture.type = this.type;\n\n    texture.offset.copy(this.offset);\n    texture.repeat.copy(this.repeat);\n\n    texture.generateMipmaps = this.generateMipmaps;\n    texture.premultiplyAlpha = this.premultiplyAlpha;\n    texture.flipY = this.flipY;\n    texture.unpackAlignment = this.unpackAlignment;\n\n    return texture;\n\n  },\n\n  update: function update() {\n\n    this.dispatchEvent({ type: 'update' });\n\n  },\n\n  dispose: function dispose() {\n\n    this.dispatchEvent({ type: 'dispose' });\n\n  } };\n\n\n\nTHREE.EventDispatcher.prototype.apply(THREE.Texture.prototype);\n\nTHREE.TextureIdCount = 0;\n\n// File:src/textures/CubeTexture.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.CubeTexture = function (images, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy) {\n\n  mapping = mapping !== undefined ? mapping : THREE.CubeReflectionMapping;\n\n  THREE.Texture.call(this, images, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy);\n\n  this.images = images;\n\n};\n\nTHREE.CubeTexture.prototype = Object.create(THREE.Texture.prototype);\nTHREE.CubeTexture.prototype.constructor = THREE.CubeTexture;\n\nTHREE.CubeTexture.clone = function (texture) {\n\n  if (texture === undefined) texture = new THREE.CubeTexture();\n\n  THREE.Texture.prototype.clone.call(this, texture);\n\n  texture.images = this.images;\n\n  return texture;\n\n};\n\n// File:src/textures/CompressedTexture.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.CompressedTexture = function (mipmaps, width, height, format, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy) {\n\n  THREE.Texture.call(this, null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy);\n\n  this.image = { width: width, height: height };\n  this.mipmaps = mipmaps;\n\n  // no flipping for cube textures\n  // (also flipping doesn't work for compressed textures )\n\n  this.flipY = false;\n\n  // can't generate mipmaps for compressed textures\n  // mips must be embedded in DDS files\n\n  this.generateMipmaps = false;\n\n};\n\nTHREE.CompressedTexture.prototype = Object.create(THREE.Texture.prototype);\nTHREE.CompressedTexture.prototype.constructor = THREE.CompressedTexture;\n\nTHREE.CompressedTexture.prototype.clone = function () {\n\n  var texture = new THREE.CompressedTexture();\n\n  THREE.Texture.prototype.clone.call(this, texture);\n\n  return texture;\n\n};\n\n// File:src/textures/DataTexture.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.DataTexture = function (data, width, height, format, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy) {\n\n  THREE.Texture.call(this, null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy);\n\n  this.image = { data: data, width: width, height: height };\n\n};\n\nTHREE.DataTexture.prototype = Object.create(THREE.Texture.prototype);\nTHREE.DataTexture.prototype.constructor = THREE.DataTexture;\n\nTHREE.DataTexture.prototype.clone = function () {\n\n  var texture = new THREE.DataTexture();\n\n  THREE.Texture.prototype.clone.call(this, texture);\n\n  return texture;\n\n};\n\n// File:src/textures/VideoTexture.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.VideoTexture = function (video, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy) {\n\n  THREE.Texture.call(this, video, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy);\n\n  this.generateMipmaps = false;\n\n  var scope = this;\n\n  var update = function update() {\n\n    requestAnimationFrame(update);\n\n    if (video.readyState === video.HAVE_ENOUGH_DATA) {\n\n      scope.needsUpdate = true;\n\n    }\n\n  };\n\n  update();\n\n};\n\nTHREE.VideoTexture.prototype = Object.create(THREE.Texture.prototype);\nTHREE.VideoTexture.prototype.constructor = THREE.VideoTexture;\n\n// File:src/objects/Group.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.Group = function () {\n\n  THREE.Object3D.call(this);\n\n  this.type = 'Group';\n\n};\n\nTHREE.Group.prototype = Object.create(THREE.Object3D.prototype);\nTHREE.Group.prototype.constructor = THREE.Group;\n\n// File:src/objects/PointCloud.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.PointCloud = function (geometry, material) {\n\n  THREE.Object3D.call(this);\n\n  this.type = 'PointCloud';\n\n  this.geometry = geometry !== undefined ? geometry : new THREE.Geometry();\n  this.material = material !== undefined ? material : new THREE.PointCloudMaterial({ color: Math.random() * 0xffffff });\n\n};\n\nTHREE.PointCloud.prototype = Object.create(THREE.Object3D.prototype);\nTHREE.PointCloud.prototype.constructor = THREE.PointCloud;\n\nTHREE.PointCloud.prototype.raycast = function () {\n\n  var inverseMatrix = new THREE.Matrix4();\n  var ray = new THREE.Ray();\n\n  return function (raycaster, intersects) {\n\n    var object = this;\n    var geometry = object.geometry;\n    var threshold = raycaster.params.PointCloud.threshold;\n\n    inverseMatrix.getInverse(this.matrixWorld);\n    ray.copy(raycaster.ray).applyMatrix4(inverseMatrix);\n\n    if (geometry.boundingBox !== null) {\n\n      if (ray.isIntersectionBox(geometry.boundingBox) === false) {\n\n        return;\n\n      }\n\n    }\n\n    var localThreshold = threshold / ((this.scale.x + this.scale.y + this.scale.z) / 3);\n    var position = new THREE.Vector3();\n\n    var testPoint = function testPoint(point, index) {\n\n      var rayPointDistance = ray.distanceToPoint(point);\n\n      if (rayPointDistance < localThreshold) {\n\n        var intersectPoint = ray.closestPointToPoint(point);\n        intersectPoint.applyMatrix4(object.matrixWorld);\n\n        var distance = raycaster.ray.origin.distanceTo(intersectPoint);\n\n        intersects.push({\n\n          distance: distance,\n          distanceToRay: rayPointDistance,\n          point: intersectPoint.clone(),\n          index: index,\n          face: null,\n          object: object });\n\n\n\n      }\n\n    };\n\n    if (geometry instanceof THREE.BufferGeometry) {\n\n      var attributes = geometry.attributes;\n      var positions = attributes.position.array;\n\n      if (attributes.index !== undefined) {\n\n        var indices = attributes.index.array;\n        var offsets = geometry.offsets;\n\n        if (offsets.length === 0) {\n\n          var offset = {\n            start: 0,\n            count: indices.length,\n            index: 0 };\n\n\n          offsets = [offset];\n\n        }\n\n        for (var oi = 0, ol = offsets.length; oi < ol; ++oi) {\n\n          var start = offsets[oi].start;\n          var count = offsets[oi].count;\n          var index = offsets[oi].index;\n\n          for (var i = start, il = start + count; i < il; i++) {\n\n            var a = index + indices[i];\n\n            position.fromArray(positions, a * 3);\n\n            testPoint(position, a);\n\n          }\n\n        }\n\n      } else {\n\n        var pointCount = positions.length / 3;\n\n        for (var i = 0; i < pointCount; i++) {\n\n          position.set(\n          positions[3 * i],\n          positions[3 * i + 1],\n          positions[3 * i + 2]);\n\n\n          testPoint(position, i);\n\n        }\n\n      }\n\n    } else {\n\n      var vertices = this.geometry.vertices;\n\n      for (var i = 0; i < vertices.length; i++) {\n\n        testPoint(vertices[i], i);\n\n      }\n\n    }\n\n  };\n\n}();\n\nTHREE.PointCloud.prototype.clone = function (object) {\n\n  if (object === undefined) object = new THREE.PointCloud(this.geometry, this.material);\n\n  THREE.Object3D.prototype.clone.call(this, object);\n\n  return object;\n\n};\n\n// Backwards compatibility\n\nTHREE.ParticleSystem = function (geometry, material) {\n\n  THREE.warn('THREE.ParticleSystem has been renamed to THREE.PointCloud.');\n  return new THREE.PointCloud(geometry, material);\n\n};\n\n// File:src/objects/Line.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.Line = function (geometry, material, mode) {\n\n  THREE.Object3D.call(this);\n\n  this.type = 'Line';\n\n  this.geometry = geometry !== undefined ? geometry : new THREE.Geometry();\n  this.material = material !== undefined ? material : new THREE.LineBasicMaterial({ color: Math.random() * 0xffffff });\n\n  this.mode = mode !== undefined ? mode : THREE.LineStrip;\n\n};\n\nTHREE.LineStrip = 0;\nTHREE.LinePieces = 1;\n\nTHREE.Line.prototype = Object.create(THREE.Object3D.prototype);\nTHREE.Line.prototype.constructor = THREE.Line;\n\nTHREE.Line.prototype.raycast = function () {\n\n  var inverseMatrix = new THREE.Matrix4();\n  var ray = new THREE.Ray();\n  var sphere = new THREE.Sphere();\n\n  return function (raycaster, intersects) {\n\n    var precision = raycaster.linePrecision;\n    var precisionSq = precision * precision;\n\n    var geometry = this.geometry;\n\n    if (geometry.boundingSphere === null) geometry.computeBoundingSphere();\n\n    // Checking boundingSphere distance to ray\n\n    sphere.copy(geometry.boundingSphere);\n    sphere.applyMatrix4(this.matrixWorld);\n\n    if (raycaster.ray.isIntersectionSphere(sphere) === false) {\n\n      return;\n\n    }\n\n    inverseMatrix.getInverse(this.matrixWorld);\n    ray.copy(raycaster.ray).applyMatrix4(inverseMatrix);\n\n    var vStart = new THREE.Vector3();\n    var vEnd = new THREE.Vector3();\n    var interSegment = new THREE.Vector3();\n    var interRay = new THREE.Vector3();\n    var step = this.mode === THREE.LineStrip ? 1 : 2;\n\n    if (geometry instanceof THREE.BufferGeometry) {\n\n      var attributes = geometry.attributes;\n\n      if (attributes.index !== undefined) {\n\n        var indices = attributes.index.array;\n        var positions = attributes.position.array;\n        var offsets = geometry.offsets;\n\n        if (offsets.length === 0) {\n\n          offsets = [{ start: 0, count: indices.length, index: 0 }];\n\n        }\n\n        for (var oi = 0; oi < offsets.length; oi++) {\n\n          var start = offsets[oi].start;\n          var count = offsets[oi].count;\n          var index = offsets[oi].index;\n\n          for (var i = start; i < start + count - 1; i += step) {\n\n            var a = index + indices[i];\n            var b = index + indices[i + 1];\n\n            vStart.fromArray(positions, a * 3);\n            vEnd.fromArray(positions, b * 3);\n\n            var distSq = ray.distanceSqToSegment(vStart, vEnd, interRay, interSegment);\n\n            if (distSq > precisionSq) continue;\n\n            var distance = ray.origin.distanceTo(interRay);\n\n            if (distance < raycaster.near || distance > raycaster.far) continue;\n\n            intersects.push({\n\n              distance: distance,\n              // What do we want? intersection point on the ray or on the segment??\n              // point: raycaster.ray.at( distance ),\n              point: interSegment.clone().applyMatrix4(this.matrixWorld),\n              index: i,\n              offsetIndex: oi,\n              face: null,\n              faceIndex: null,\n              object: this });\n\n\n\n          }\n\n        }\n\n      } else {\n\n        var positions = attributes.position.array;\n\n        for (var i = 0; i < positions.length / 3 - 1; i += step) {\n\n          vStart.fromArray(positions, 3 * i);\n          vEnd.fromArray(positions, 3 * i + 3);\n\n          var distSq = ray.distanceSqToSegment(vStart, vEnd, interRay, interSegment);\n\n          if (distSq > precisionSq) continue;\n\n          var distance = ray.origin.distanceTo(interRay);\n\n          if (distance < raycaster.near || distance > raycaster.far) continue;\n\n          intersects.push({\n\n            distance: distance,\n            // What do we want? intersection point on the ray or on the segment??\n            // point: raycaster.ray.at( distance ),\n            point: interSegment.clone().applyMatrix4(this.matrixWorld),\n            index: i,\n            face: null,\n            faceIndex: null,\n            object: this });\n\n\n\n        }\n\n      }\n\n    } else if (geometry instanceof THREE.Geometry) {\n\n      var vertices = geometry.vertices;\n      var nbVertices = vertices.length;\n\n      for (var i = 0; i < nbVertices - 1; i += step) {\n\n        var distSq = ray.distanceSqToSegment(vertices[i], vertices[i + 1], interRay, interSegment);\n\n        if (distSq > precisionSq) continue;\n\n        var distance = ray.origin.distanceTo(interRay);\n\n        if (distance < raycaster.near || distance > raycaster.far) continue;\n\n        intersects.push({\n\n          distance: distance,\n          // What do we want? intersection point on the ray or on the segment??\n          // point: raycaster.ray.at( distance ),\n          point: interSegment.clone().applyMatrix4(this.matrixWorld),\n          index: i,\n          face: null,\n          faceIndex: null,\n          object: this });\n\n\n\n      }\n\n    }\n\n  };\n\n}();\n\nTHREE.Line.prototype.clone = function (object) {\n\n  if (object === undefined) object = new THREE.Line(this.geometry, this.material, this.mode);\n\n  THREE.Object3D.prototype.clone.call(this, object);\n\n  return object;\n\n};\n\n// File:src/objects/Mesh.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n * @author mikael emtinger / http://gomo.se/\n * @author jonobr1 / http://jonobr1.com/\n */\n\nTHREE.Mesh = function (geometry, material) {\n\n  THREE.Object3D.call(this);\n\n  this.type = 'Mesh';\n\n  this.geometry = geometry !== undefined ? geometry : new THREE.Geometry();\n  this.material = material !== undefined ? material : new THREE.MeshBasicMaterial({ color: Math.random() * 0xffffff });\n\n  this.updateMorphTargets();\n\n};\n\nTHREE.Mesh.prototype = Object.create(THREE.Object3D.prototype);\nTHREE.Mesh.prototype.constructor = THREE.Mesh;\n\nTHREE.Mesh.prototype.updateMorphTargets = function () {\n\n  if (this.geometry.morphTargets !== undefined && this.geometry.morphTargets.length > 0) {\n\n    this.morphTargetBase = -1;\n    this.morphTargetForcedOrder = [];\n    this.morphTargetInfluences = [];\n    this.morphTargetDictionary = {};\n\n    for (var m = 0, ml = this.geometry.morphTargets.length; m < ml; m++) {\n\n      this.morphTargetInfluences.push(0);\n      this.morphTargetDictionary[this.geometry.morphTargets[m].name] = m;\n\n    }\n\n  }\n\n};\n\nTHREE.Mesh.prototype.getMorphTargetIndexByName = function (name) {\n\n  if (this.morphTargetDictionary[name] !== undefined) {\n\n    return this.morphTargetDictionary[name];\n\n  }\n\n  THREE.warn('THREE.Mesh.getMorphTargetIndexByName: morph target ' + name + ' does not exist. Returning 0.');\n\n  return 0;\n\n};\n\n\nTHREE.Mesh.prototype.raycast = function () {\n\n  var inverseMatrix = new THREE.Matrix4();\n  var ray = new THREE.Ray();\n  var sphere = new THREE.Sphere();\n\n  var vA = new THREE.Vector3();\n  var vB = new THREE.Vector3();\n  var vC = new THREE.Vector3();\n\n  return function (raycaster, intersects) {\n\n    var geometry = this.geometry;\n\n    // Checking boundingSphere distance to ray\n\n    if (geometry.boundingSphere === null) geometry.computeBoundingSphere();\n\n    sphere.copy(geometry.boundingSphere);\n    sphere.applyMatrix4(this.matrixWorld);\n\n    if (raycaster.ray.isIntersectionSphere(sphere) === false) {\n\n      return;\n\n    }\n\n    // Check boundingBox before continuing\n\n    inverseMatrix.getInverse(this.matrixWorld);\n    ray.copy(raycaster.ray).applyMatrix4(inverseMatrix);\n\n    if (geometry.boundingBox !== null) {\n\n      if (ray.isIntersectionBox(geometry.boundingBox) === false) {\n\n        return;\n\n      }\n\n    }\n\n    if (geometry instanceof THREE.BufferGeometry) {\n\n      var material = this.material;\n\n      if (material === undefined) return;\n\n      var attributes = geometry.attributes;\n\n      var a, b, c;\n      var precision = raycaster.precision;\n\n      if (attributes.index !== undefined) {\n\n        var indices = attributes.index.array;\n        var positions = attributes.position.array;\n        var offsets = geometry.offsets;\n\n        if (offsets.length === 0) {\n\n          offsets = [{ start: 0, count: indices.length, index: 0 }];\n\n        }\n\n        for (var oi = 0, ol = offsets.length; oi < ol; ++oi) {\n\n          var start = offsets[oi].start;\n          var count = offsets[oi].count;\n          var index = offsets[oi].index;\n\n          for (var i = start, il = start + count; i < il; i += 3) {\n\n            a = index + indices[i];\n            b = index + indices[i + 1];\n            c = index + indices[i + 2];\n\n            vA.fromArray(positions, a * 3);\n            vB.fromArray(positions, b * 3);\n            vC.fromArray(positions, c * 3);\n\n            if (material.side === THREE.BackSide) {\n\n              var intersectionPoint = ray.intersectTriangle(vC, vB, vA, true);\n\n            } else {\n\n              var intersectionPoint = ray.intersectTriangle(vA, vB, vC, material.side !== THREE.DoubleSide);\n\n            }\n\n            if (intersectionPoint === null) continue;\n\n            intersectionPoint.applyMatrix4(this.matrixWorld);\n\n            var distance = raycaster.ray.origin.distanceTo(intersectionPoint);\n\n            if (distance < precision || distance < raycaster.near || distance > raycaster.far) continue;\n\n            intersects.push({\n\n              distance: distance,\n              point: intersectionPoint,\n              face: new THREE.Face3(a, b, c, THREE.Triangle.normal(vA, vB, vC)),\n              faceIndex: null,\n              object: this });\n\n\n\n          }\n\n        }\n\n      } else {\n\n        var positions = attributes.position.array;\n\n        for (var i = 0, j = 0, il = positions.length; i < il; i += 3, j += 9) {\n\n          a = i;\n          b = i + 1;\n          c = i + 2;\n\n          vA.fromArray(positions, j);\n          vB.fromArray(positions, j + 3);\n          vC.fromArray(positions, j + 6);\n\n          if (material.side === THREE.BackSide) {\n\n            var intersectionPoint = ray.intersectTriangle(vC, vB, vA, true);\n\n          } else {\n\n            var intersectionPoint = ray.intersectTriangle(vA, vB, vC, material.side !== THREE.DoubleSide);\n\n          }\n\n          if (intersectionPoint === null) continue;\n\n          intersectionPoint.applyMatrix4(this.matrixWorld);\n\n          var distance = raycaster.ray.origin.distanceTo(intersectionPoint);\n\n          if (distance < precision || distance < raycaster.near || distance > raycaster.far) continue;\n\n          intersects.push({\n\n            distance: distance,\n            point: intersectionPoint,\n            face: new THREE.Face3(a, b, c, THREE.Triangle.normal(vA, vB, vC)),\n            faceIndex: null,\n            object: this });\n\n\n\n        }\n\n      }\n\n    } else if (geometry instanceof THREE.Geometry) {\n\n      var isFaceMaterial = this.material instanceof THREE.MeshFaceMaterial;\n      var objectMaterials = isFaceMaterial === true ? this.material.materials : null;\n\n      var a, b, c;\n      var precision = raycaster.precision;\n\n      var vertices = geometry.vertices;\n\n      for (var f = 0, fl = geometry.faces.length; f < fl; f++) {\n\n        var face = geometry.faces[f];\n\n        var material = isFaceMaterial === true ? objectMaterials[face.materialIndex] : this.material;\n\n        if (material === undefined) continue;\n\n        a = vertices[face.a];\n        b = vertices[face.b];\n        c = vertices[face.c];\n\n        if (material.morphTargets === true) {\n\n          var morphTargets = geometry.morphTargets;\n          var morphInfluences = this.morphTargetInfluences;\n\n          vA.set(0, 0, 0);\n          vB.set(0, 0, 0);\n          vC.set(0, 0, 0);\n\n          for (var t = 0, tl = morphTargets.length; t < tl; t++) {\n\n            var influence = morphInfluences[t];\n\n            if (influence === 0) continue;\n\n            var targets = morphTargets[t].vertices;\n\n            vA.x += (targets[face.a].x - a.x) * influence;\n            vA.y += (targets[face.a].y - a.y) * influence;\n            vA.z += (targets[face.a].z - a.z) * influence;\n\n            vB.x += (targets[face.b].x - b.x) * influence;\n            vB.y += (targets[face.b].y - b.y) * influence;\n            vB.z += (targets[face.b].z - b.z) * influence;\n\n            vC.x += (targets[face.c].x - c.x) * influence;\n            vC.y += (targets[face.c].y - c.y) * influence;\n            vC.z += (targets[face.c].z - c.z) * influence;\n\n          }\n\n          vA.add(a);\n          vB.add(b);\n          vC.add(c);\n\n          a = vA;\n          b = vB;\n          c = vC;\n\n        }\n\n        if (material.side === THREE.BackSide) {\n\n          var intersectionPoint = ray.intersectTriangle(c, b, a, true);\n\n        } else {\n\n          var intersectionPoint = ray.intersectTriangle(a, b, c, material.side !== THREE.DoubleSide);\n\n        }\n\n        if (intersectionPoint === null) continue;\n\n        intersectionPoint.applyMatrix4(this.matrixWorld);\n\n        var distance = raycaster.ray.origin.distanceTo(intersectionPoint);\n\n        if (distance < precision || distance < raycaster.near || distance > raycaster.far) continue;\n\n        intersects.push({\n\n          distance: distance,\n          point: intersectionPoint,\n          face: face,\n          faceIndex: f,\n          object: this });\n\n\n\n      }\n\n    }\n\n  };\n\n}();\n\nTHREE.Mesh.prototype.clone = function (object, recursive) {\n\n  if (object === undefined) object = new THREE.Mesh(this.geometry, this.material);\n\n  THREE.Object3D.prototype.clone.call(this, object, recursive);\n\n  return object;\n\n};\n\n// File:src/objects/Bone.js\n\n/**\n * @author mikael emtinger / http://gomo.se/\n * @author alteredq / http://alteredqualia.com/\n * @author ikerr / http://verold.com\n */\n\nTHREE.Bone = function (skin) {\n\n  THREE.Object3D.call(this);\n\n  this.type = 'Bone';\n\n  this.skin = skin;\n\n};\n\nTHREE.Bone.prototype = Object.create(THREE.Object3D.prototype);\nTHREE.Bone.prototype.constructor = THREE.Bone;\n\n// File:src/objects/Skeleton.js\n\n/**\n * @author mikael emtinger / http://gomo.se/\n * @author alteredq / http://alteredqualia.com/\n * @author michael guerrero / http://realitymeltdown.com\n * @author ikerr / http://verold.com\n */\n\nTHREE.Skeleton = function (bones, boneInverses, useVertexTexture) {\n\n  this.useVertexTexture = useVertexTexture !== undefined ? useVertexTexture : true;\n\n  this.identityMatrix = new THREE.Matrix4();\n\n  // copy the bone array\n\n  bones = bones || [];\n\n  this.bones = bones.slice(0);\n\n  // create a bone texture or an array of floats\n\n  if (this.useVertexTexture) {\n\n    // layout (1 matrix = 4 pixels)\n    //      RGBA RGBA RGBA RGBA (=> column1, column2, column3, column4)\n    //  with  8x8  pixel texture max   16 bones  (8 * 8  / 4)\n    //       16x16 pixel texture max   64 bones (16 * 16 / 4)\n    //       32x32 pixel texture max  256 bones (32 * 32 / 4)\n    //       64x64 pixel texture max 1024 bones (64 * 64 / 4)\n\n    var size;\n\n    if (this.bones.length > 256)\n    size = 64;else\n    if (this.bones.length > 64)\n    size = 32;else\n    if (this.bones.length > 16)\n    size = 16;else\n\n    size = 8;\n\n    this.boneTextureWidth = size;\n    this.boneTextureHeight = size;\n\n    this.boneMatrices = new Float32Array(this.boneTextureWidth * this.boneTextureHeight * 4); // 4 floats per RGBA pixel\n    this.boneTexture = new THREE.DataTexture(this.boneMatrices, this.boneTextureWidth, this.boneTextureHeight, THREE.RGBAFormat, THREE.FloatType);\n    this.boneTexture.minFilter = THREE.NearestFilter;\n    this.boneTexture.magFilter = THREE.NearestFilter;\n    this.boneTexture.generateMipmaps = false;\n    this.boneTexture.flipY = false;\n\n  } else {\n\n    this.boneMatrices = new Float32Array(16 * this.bones.length);\n\n  }\n\n  // use the supplied bone inverses or calculate the inverses\n\n  if (boneInverses === undefined) {\n\n    this.calculateInverses();\n\n  } else {\n\n    if (this.bones.length === boneInverses.length) {\n\n      this.boneInverses = boneInverses.slice(0);\n\n    } else {\n\n      THREE.warn('THREE.Skeleton bonInverses is the wrong length.');\n\n      this.boneInverses = [];\n\n      for (var b = 0, bl = this.bones.length; b < bl; b++) {\n\n        this.boneInverses.push(new THREE.Matrix4());\n\n      }\n\n    }\n\n  }\n\n};\n\nTHREE.Skeleton.prototype.calculateInverses = function () {\n\n  this.boneInverses = [];\n\n  for (var b = 0, bl = this.bones.length; b < bl; b++) {\n\n    var inverse = new THREE.Matrix4();\n\n    if (this.bones[b]) {\n\n      inverse.getInverse(this.bones[b].matrixWorld);\n\n    }\n\n    this.boneInverses.push(inverse);\n\n  }\n\n};\n\nTHREE.Skeleton.prototype.pose = function () {\n\n  var bone;\n\n  // recover the bind-time world matrices\n\n  for (var b = 0, bl = this.bones.length; b < bl; b++) {\n\n    bone = this.bones[b];\n\n    if (bone) {\n\n      bone.matrixWorld.getInverse(this.boneInverses[b]);\n\n    }\n\n  }\n\n  // compute the local matrices, positions, rotations and scales\n\n  for (var b = 0, bl = this.bones.length; b < bl; b++) {\n\n    bone = this.bones[b];\n\n    if (bone) {\n\n      if (bone.parent) {\n\n        bone.matrix.getInverse(bone.parent.matrixWorld);\n        bone.matrix.multiply(bone.matrixWorld);\n\n      } else {\n\n        bone.matrix.copy(bone.matrixWorld);\n\n      }\n\n      bone.matrix.decompose(bone.position, bone.quaternion, bone.scale);\n\n    }\n\n  }\n\n};\n\nTHREE.Skeleton.prototype.update = function () {\n\n  var offsetMatrix = new THREE.Matrix4();\n\n  return function () {\n\n    // flatten bone matrices to array\n\n    for (var b = 0, bl = this.bones.length; b < bl; b++) {\n\n      // compute the offset between the current and the original transform\n\n      var matrix = this.bones[b] ? this.bones[b].matrixWorld : this.identityMatrix;\n\n      offsetMatrix.multiplyMatrices(matrix, this.boneInverses[b]);\n      offsetMatrix.flattenToArrayOffset(this.boneMatrices, b * 16);\n\n    }\n\n    if (this.useVertexTexture) {\n\n      this.boneTexture.needsUpdate = true;\n\n    }\n\n  };\n\n}();\n\n\n// File:src/objects/SkinnedMesh.js\n\n/**\n * @author mikael emtinger / http://gomo.se/\n * @author alteredq / http://alteredqualia.com/\n * @author ikerr / http://verold.com\n */\n\nTHREE.SkinnedMesh = function (geometry, material, useVertexTexture) {\n\n  THREE.Mesh.call(this, geometry, material);\n\n  this.type = 'SkinnedMesh';\n\n  this.bindMode = \"attached\";\n  this.bindMatrix = new THREE.Matrix4();\n  this.bindMatrixInverse = new THREE.Matrix4();\n\n  // init bones\n\n  // TODO: remove bone creation as there is no reason (other than\n  // convenience) for THREE.SkinnedMesh to do this.\n\n  var bones = [];\n\n  if (this.geometry && this.geometry.bones !== undefined) {\n\n    var bone, gbone, p, q, s;\n\n    for (var b = 0, bl = this.geometry.bones.length; b < bl; ++b) {\n\n      gbone = this.geometry.bones[b];\n\n      p = gbone.pos;\n      q = gbone.rotq;\n      s = gbone.scl;\n\n      bone = new THREE.Bone(this);\n      bones.push(bone);\n\n      bone.name = gbone.name;\n      bone.position.set(p[0], p[1], p[2]);\n      bone.quaternion.set(q[0], q[1], q[2], q[3]);\n\n      if (s !== undefined) {\n\n        bone.scale.set(s[0], s[1], s[2]);\n\n      } else {\n\n        bone.scale.set(1, 1, 1);\n\n      }\n\n    }\n\n    for (var b = 0, bl = this.geometry.bones.length; b < bl; ++b) {\n\n      gbone = this.geometry.bones[b];\n\n      if (gbone.parent !== -1) {\n\n        bones[gbone.parent].add(bones[b]);\n\n      } else {\n\n        this.add(bones[b]);\n\n      }\n\n    }\n\n  }\n\n  this.normalizeSkinWeights();\n\n  this.updateMatrixWorld(true);\n  this.bind(new THREE.Skeleton(bones, undefined, useVertexTexture));\n\n};\n\n\nTHREE.SkinnedMesh.prototype = Object.create(THREE.Mesh.prototype);\nTHREE.SkinnedMesh.prototype.constructor = THREE.SkinnedMesh;\n\nTHREE.SkinnedMesh.prototype.bind = function (skeleton, bindMatrix) {\n\n  this.skeleton = skeleton;\n\n  if (bindMatrix === undefined) {\n\n    this.updateMatrixWorld(true);\n\n    bindMatrix = this.matrixWorld;\n\n  }\n\n  this.bindMatrix.copy(bindMatrix);\n  this.bindMatrixInverse.getInverse(bindMatrix);\n\n};\n\nTHREE.SkinnedMesh.prototype.pose = function () {\n\n  this.skeleton.pose();\n\n};\n\nTHREE.SkinnedMesh.prototype.normalizeSkinWeights = function () {\n\n  if (this.geometry instanceof THREE.Geometry) {\n\n    for (var i = 0; i < this.geometry.skinIndices.length; i++) {\n\n      var sw = this.geometry.skinWeights[i];\n\n      var scale = 1.0 / sw.lengthManhattan();\n\n      if (scale !== Infinity) {\n\n        sw.multiplyScalar(scale);\n\n      } else {\n\n        sw.set(1); // this will be normalized by the shader anyway\n\n      }\n\n    }\n\n  } else {\n\n      // skinning weights assumed to be normalized for THREE.BufferGeometry\n\n    }\n\n};\n\nTHREE.SkinnedMesh.prototype.updateMatrixWorld = function (force) {\n\n  THREE.Mesh.prototype.updateMatrixWorld.call(this, true);\n\n  if (this.bindMode === \"attached\") {\n\n    this.bindMatrixInverse.getInverse(this.matrixWorld);\n\n  } else if (this.bindMode === \"detached\") {\n\n    this.bindMatrixInverse.getInverse(this.bindMatrix);\n\n  } else {\n\n    THREE.warn('THREE.SkinnedMesh unreckognized bindMode: ' + this.bindMode);\n\n  }\n\n};\n\nTHREE.SkinnedMesh.prototype.clone = function (object) {\n\n  if (object === undefined) {\n\n    object = new THREE.SkinnedMesh(this.geometry, this.material, this.useVertexTexture);\n\n  }\n\n  THREE.Mesh.prototype.clone.call(this, object);\n\n  return object;\n\n};\n\n\n// File:src/objects/MorphAnimMesh.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.MorphAnimMesh = function (geometry, material) {\n\n  THREE.Mesh.call(this, geometry, material);\n\n  this.type = 'MorphAnimMesh';\n\n  // API\n\n  this.duration = 1000; // milliseconds\n  this.mirroredLoop = false;\n  this.time = 0;\n\n  // internals\n\n  this.lastKeyframe = 0;\n  this.currentKeyframe = 0;\n\n  this.direction = 1;\n  this.directionBackwards = false;\n\n  this.setFrameRange(0, this.geometry.morphTargets.length - 1);\n\n};\n\nTHREE.MorphAnimMesh.prototype = Object.create(THREE.Mesh.prototype);\nTHREE.MorphAnimMesh.prototype.constructor = THREE.MorphAnimMesh;\n\nTHREE.MorphAnimMesh.prototype.setFrameRange = function (start, end) {\n\n  this.startKeyframe = start;\n  this.endKeyframe = end;\n\n  this.length = this.endKeyframe - this.startKeyframe + 1;\n\n};\n\nTHREE.MorphAnimMesh.prototype.setDirectionForward = function () {\n\n  this.direction = 1;\n  this.directionBackwards = false;\n\n};\n\nTHREE.MorphAnimMesh.prototype.setDirectionBackward = function () {\n\n  this.direction = -1;\n  this.directionBackwards = true;\n\n};\n\nTHREE.MorphAnimMesh.prototype.parseAnimations = function () {\n\n  var geometry = this.geometry;\n\n  if (!geometry.animations) geometry.animations = {};\n\n  var firstAnimation,animations = geometry.animations;\n\n  var pattern = /([a-z]+)_?(\\d+)/;\n\n  for (var i = 0, il = geometry.morphTargets.length; i < il; i++) {\n\n    var morph = geometry.morphTargets[i];\n    var parts = morph.name.match(pattern);\n\n    if (parts && parts.length > 1) {\n\n      var label = parts[1];\n\n      if (!animations[label]) animations[label] = { start: Infinity, end: -Infinity };\n\n      var animation = animations[label];\n\n      if (i < animation.start) animation.start = i;\n      if (i > animation.end) animation.end = i;\n\n      if (!firstAnimation) firstAnimation = label;\n\n    }\n\n  }\n\n  geometry.firstAnimation = firstAnimation;\n\n};\n\nTHREE.MorphAnimMesh.prototype.setAnimationLabel = function (label, start, end) {\n\n  if (!this.geometry.animations) this.geometry.animations = {};\n\n  this.geometry.animations[label] = { start: start, end: end };\n\n};\n\nTHREE.MorphAnimMesh.prototype.playAnimation = function (label, fps) {\n\n  var animation = this.geometry.animations[label];\n\n  if (animation) {\n\n    this.setFrameRange(animation.start, animation.end);\n    this.duration = 1000 * ((animation.end - animation.start) / fps);\n    this.time = 0;\n\n  } else {\n\n    THREE.warn('THREE.MorphAnimMesh: animation[' + label + '] undefined in .playAnimation()');\n\n  }\n\n};\n\nTHREE.MorphAnimMesh.prototype.updateAnimation = function (delta) {\n\n  var frameTime = this.duration / this.length;\n\n  this.time += this.direction * delta;\n\n  if (this.mirroredLoop) {\n\n    if (this.time > this.duration || this.time < 0) {\n\n      this.direction *= -1;\n\n      if (this.time > this.duration) {\n\n        this.time = this.duration;\n        this.directionBackwards = true;\n\n      }\n\n      if (this.time < 0) {\n\n        this.time = 0;\n        this.directionBackwards = false;\n\n      }\n\n    }\n\n  } else {\n\n    this.time = this.time % this.duration;\n\n    if (this.time < 0) this.time += this.duration;\n\n  }\n\n  var keyframe = this.startKeyframe + THREE.Math.clamp(Math.floor(this.time / frameTime), 0, this.length - 1);\n\n  if (keyframe !== this.currentKeyframe) {\n\n    this.morphTargetInfluences[this.lastKeyframe] = 0;\n    this.morphTargetInfluences[this.currentKeyframe] = 1;\n\n    this.morphTargetInfluences[keyframe] = 0;\n\n    this.lastKeyframe = this.currentKeyframe;\n    this.currentKeyframe = keyframe;\n\n  }\n\n  var mix = this.time % frameTime / frameTime;\n\n  if (this.directionBackwards) {\n\n    mix = 1 - mix;\n\n  }\n\n  this.morphTargetInfluences[this.currentKeyframe] = mix;\n  this.morphTargetInfluences[this.lastKeyframe] = 1 - mix;\n\n};\n\nTHREE.MorphAnimMesh.prototype.interpolateTargets = function (a, b, t) {\n\n  var influences = this.morphTargetInfluences;\n\n  for (var i = 0, l = influences.length; i < l; i++) {\n\n    influences[i] = 0;\n\n  }\n\n  if (a > -1) influences[a] = 1 - t;\n  if (b > -1) influences[b] = t;\n\n};\n\nTHREE.MorphAnimMesh.prototype.clone = function (object) {\n\n  if (object === undefined) object = new THREE.MorphAnimMesh(this.geometry, this.material);\n\n  object.duration = this.duration;\n  object.mirroredLoop = this.mirroredLoop;\n  object.time = this.time;\n\n  object.lastKeyframe = this.lastKeyframe;\n  object.currentKeyframe = this.currentKeyframe;\n\n  object.direction = this.direction;\n  object.directionBackwards = this.directionBackwards;\n\n  THREE.Mesh.prototype.clone.call(this, object);\n\n  return object;\n\n};\n\n// File:src/objects/LOD.js\n\n/**\n * @author mikael emtinger / http://gomo.se/\n * @author alteredq / http://alteredqualia.com/\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.LOD = function () {\n\n  THREE.Object3D.call(this);\n\n  this.objects = [];\n\n};\n\n\nTHREE.LOD.prototype = Object.create(THREE.Object3D.prototype);\nTHREE.LOD.prototype.constructor = THREE.LOD;\n\nTHREE.LOD.prototype.addLevel = function (object, distance) {\n\n  if (distance === undefined) distance = 0;\n\n  distance = Math.abs(distance);\n\n  for (var l = 0; l < this.objects.length; l++) {\n\n    if (distance < this.objects[l].distance) {\n\n      break;\n\n    }\n\n  }\n\n  this.objects.splice(l, 0, { distance: distance, object: object });\n  this.add(object);\n\n};\n\nTHREE.LOD.prototype.getObjectForDistance = function (distance) {\n\n  for (var i = 1, l = this.objects.length; i < l; i++) {\n\n    if (distance < this.objects[i].distance) {\n\n      break;\n\n    }\n\n  }\n\n  return this.objects[i - 1].object;\n\n};\n\nTHREE.LOD.prototype.raycast = function () {\n\n  var matrixPosition = new THREE.Vector3();\n\n  return function (raycaster, intersects) {\n\n    matrixPosition.setFromMatrixPosition(this.matrixWorld);\n\n    var distance = raycaster.ray.origin.distanceTo(matrixPosition);\n\n    this.getObjectForDistance(distance).raycast(raycaster, intersects);\n\n  };\n\n}();\n\nTHREE.LOD.prototype.update = function () {\n\n  var v1 = new THREE.Vector3();\n  var v2 = new THREE.Vector3();\n\n  return function (camera) {\n\n    if (this.objects.length > 1) {\n\n      v1.setFromMatrixPosition(camera.matrixWorld);\n      v2.setFromMatrixPosition(this.matrixWorld);\n\n      var distance = v1.distanceTo(v2);\n\n      this.objects[0].object.visible = true;\n\n      for (var i = 1, l = this.objects.length; i < l; i++) {\n\n        if (distance >= this.objects[i].distance) {\n\n          this.objects[i - 1].object.visible = false;\n          this.objects[i].object.visible = true;\n\n        } else {\n\n          break;\n\n        }\n\n      }\n\n      for (; i < l; i++) {\n\n        this.objects[i].object.visible = false;\n\n      }\n\n    }\n\n  };\n\n}();\n\nTHREE.LOD.prototype.clone = function (object) {\n\n  if (object === undefined) object = new THREE.LOD();\n\n  THREE.Object3D.prototype.clone.call(this, object);\n\n  for (var i = 0, l = this.objects.length; i < l; i++) {\n    var x = this.objects[i].object.clone();\n    x.visible = i === 0;\n    object.addLevel(x, this.objects[i].distance);\n  }\n\n  return object;\n\n};\n\n// File:src/objects/Sprite.js\n\n/**\n * @author mikael emtinger / http://gomo.se/\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.Sprite = function () {\n\n  var indices = new Uint16Array([0, 1, 2, 0, 2, 3]);\n  var vertices = new Float32Array([-0.5, -0.5, 0, 0.5, -0.5, 0, 0.5, 0.5, 0, -0.5, 0.5, 0]);\n  var uvs = new Float32Array([0, 0, 1, 0, 1, 1, 0, 1]);\n\n  var geometry = new THREE.BufferGeometry();\n  geometry.addAttribute('index', new THREE.BufferAttribute(indices, 1));\n  geometry.addAttribute('position', new THREE.BufferAttribute(vertices, 3));\n  geometry.addAttribute('uv', new THREE.BufferAttribute(uvs, 2));\n\n  return function (material) {\n\n    THREE.Object3D.call(this);\n\n    this.type = 'Sprite';\n\n    this.geometry = geometry;\n    this.material = material !== undefined ? material : new THREE.SpriteMaterial();\n\n  };\n\n}();\n\nTHREE.Sprite.prototype = Object.create(THREE.Object3D.prototype);\nTHREE.Sprite.prototype.constructor = THREE.Sprite;\n\nTHREE.Sprite.prototype.raycast = function () {\n\n  var matrixPosition = new THREE.Vector3();\n\n  return function (raycaster, intersects) {\n\n    matrixPosition.setFromMatrixPosition(this.matrixWorld);\n\n    var distance = raycaster.ray.distanceToPoint(matrixPosition);\n\n    if (distance > this.scale.x) {\n\n      return;\n\n    }\n\n    intersects.push({\n\n      distance: distance,\n      point: this.position,\n      face: null,\n      object: this });\n\n\n\n  };\n\n}();\n\nTHREE.Sprite.prototype.clone = function (object) {\n\n  if (object === undefined) object = new THREE.Sprite(this.material);\n\n  THREE.Object3D.prototype.clone.call(this, object);\n\n  return object;\n\n};\n\n// Backwards compatibility\n\nTHREE.Particle = THREE.Sprite;\n\n// File:src/objects/LensFlare.js\n\n/**\n * @author mikael emtinger / http://gomo.se/\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.LensFlare = function (texture, size, distance, blending, color) {\n\n  THREE.Object3D.call(this);\n\n  this.lensFlares = [];\n\n  this.positionScreen = new THREE.Vector3();\n  this.customUpdateCallback = undefined;\n\n  if (texture !== undefined) {\n\n    this.add(texture, size, distance, blending, color);\n\n  }\n\n};\n\nTHREE.LensFlare.prototype = Object.create(THREE.Object3D.prototype);\nTHREE.LensFlare.prototype.constructor = THREE.LensFlare;\n\n\n/*\n                                                          * Add: adds another flare\n                                                          */\n\nTHREE.LensFlare.prototype.add = function (texture, size, distance, blending, color, opacity) {\n\n  if (size === undefined) size = -1;\n  if (distance === undefined) distance = 0;\n  if (opacity === undefined) opacity = 1;\n  if (color === undefined) color = new THREE.Color(0xffffff);\n  if (blending === undefined) blending = THREE.NormalBlending;\n\n  distance = Math.min(distance, Math.max(0, distance));\n\n  this.lensFlares.push({\n    texture: texture, // THREE.Texture\n    size: size, // size in pixels (-1 = use texture.width)\n    distance: distance, // distance (0-1) from light source (0=at light source)\n    x: 0, y: 0, z: 0, // screen position (-1 => 1) z = 0 is ontop z = 1 is back\n    scale: 1, // scale\n    rotation: 1, // rotation\n    opacity: opacity, // opacity\n    color: color, // color\n    blending: blending // blending\n  });\n\n};\n\n/*\n    * Update lens flares update positions on all flares based on the screen position\n    * Set myLensFlare.customUpdateCallback to alter the flares in your project specific way.\n    */\n\nTHREE.LensFlare.prototype.updateLensFlares = function () {\n\n  var f,fl = this.lensFlares.length;\n  var flare;\n  var vecX = -this.positionScreen.x * 2;\n  var vecY = -this.positionScreen.y * 2;\n\n  for (f = 0; f < fl; f++) {\n\n    flare = this.lensFlares[f];\n\n    flare.x = this.positionScreen.x + vecX * flare.distance;\n    flare.y = this.positionScreen.y + vecY * flare.distance;\n\n    flare.wantedRotation = flare.x * Math.PI * 0.25;\n    flare.rotation += (flare.wantedRotation - flare.rotation) * 0.25;\n\n  }\n\n};\n\n\n// File:src/scenes/Scene.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.Scene = function () {\n\n  THREE.Object3D.call(this);\n\n  this.type = 'Scene';\n\n  this.fog = null;\n  this.overrideMaterial = null;\n\n  this.autoUpdate = true; // checked by the renderer\n\n};\n\nTHREE.Scene.prototype = Object.create(THREE.Object3D.prototype);\nTHREE.Scene.prototype.constructor = THREE.Scene;\n\nTHREE.Scene.prototype.clone = function (object) {\n\n  if (object === undefined) object = new THREE.Scene();\n\n  THREE.Object3D.prototype.clone.call(this, object);\n\n  if (this.fog !== null) object.fog = this.fog.clone();\n  if (this.overrideMaterial !== null) object.overrideMaterial = this.overrideMaterial.clone();\n\n  object.autoUpdate = this.autoUpdate;\n  object.matrixAutoUpdate = this.matrixAutoUpdate;\n\n  return object;\n\n};\n\n// File:src/scenes/Fog.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.Fog = function (color, near, far) {\n\n  this.name = '';\n\n  this.color = new THREE.Color(color);\n\n  this.near = near !== undefined ? near : 1;\n  this.far = far !== undefined ? far : 1000;\n\n};\n\nTHREE.Fog.prototype.clone = function () {\n\n  return new THREE.Fog(this.color.getHex(), this.near, this.far);\n\n};\n\n// File:src/scenes/FogExp2.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.FogExp2 = function (color, density) {\n\n  this.name = '';\n\n  this.color = new THREE.Color(color);\n  this.density = density !== undefined ? density : 0.00025;\n\n};\n\nTHREE.FogExp2.prototype.clone = function () {\n\n  return new THREE.FogExp2(this.color.getHex(), this.density);\n\n};\n\n// File:src/renderers/shaders/ShaderChunk.js\n\nTHREE.ShaderChunk = {};\n\n// File:src/renderers/shaders/ShaderChunk/common.glsl\n\nTHREE.ShaderChunk['common'] = \"#define PI 3.14159\\n#define PI2 6.28318\\n#define RECIPROCAL_PI2 0.15915494\\n#define LOG2 1.442695\\n#define EPSILON 1e-6\\n\\nfloat square( in float a ) { return a*a; }\\nvec2  square( in vec2 a )  { return vec2( a.x*a.x, a.y*a.y ); }\\nvec3  square( in vec3 a )  { return vec3( a.x*a.x, a.y*a.y, a.z*a.z ); }\\nvec4  square( in vec4 a )  { return vec4( a.x*a.x, a.y*a.y, a.z*a.z, a.w*a.w ); }\\nfloat saturate( in float a ) { return clamp( a, 0.0, 1.0 ); }\\nvec2  saturate( in vec2 a )  { return clamp( a, 0.0, 1.0 ); }\\nvec3  saturate( in vec3 a )  { return clamp( a, 0.0, 1.0 ); }\\nvec4  saturate( in vec4 a )  { return clamp( a, 0.0, 1.0 ); }\\nfloat average( in float a ) { return a; }\\nfloat average( in vec2 a )  { return ( a.x + a.y) * 0.5; }\\nfloat average( in vec3 a )  { return ( a.x + a.y + a.z) / 3.0; }\\nfloat average( in vec4 a )  { return ( a.x + a.y + a.z + a.w) * 0.25; }\\nfloat whiteCompliment( in float a ) { return saturate( 1.0 - a ); }\\nvec2  whiteCompliment( in vec2 a )  { return saturate( vec2(1.0) - a ); }\\nvec3  whiteCompliment( in vec3 a )  { return saturate( vec3(1.0) - a ); }\\nvec4  whiteCompliment( in vec4 a )  { return saturate( vec4(1.0) - a ); }\\nvec3 transformDirection( in vec3 normal, in mat4 matrix ) {\\n\treturn normalize( ( matrix * vec4( normal, 0.0 ) ).xyz );\\n}\\n// http://en.wikibooks.org/wiki/GLSL_Programming/Applying_Matrix_Transformations\\nvec3 inverseTransformDirection( in vec3 normal, in mat4 matrix ) {\\n\treturn normalize( ( vec4( normal, 0.0 ) * matrix ).xyz );\\n}\\nvec3 projectOnPlane(in vec3 point, in vec3 pointOnPlane, in vec3 planeNormal) {\\n\tfloat distance = dot( planeNormal, point-pointOnPlane );\\n\treturn point - distance * planeNormal;\\n}\\nfloat sideOfPlane( in vec3 point, in vec3 pointOnPlane, in vec3 planeNormal ) {\\n\treturn sign( dot( point - pointOnPlane, planeNormal ) );\\n}\\nvec3 linePlaneIntersect( in vec3 pointOnLine, in vec3 lineDirection, in vec3 pointOnPlane, in vec3 planeNormal ) {\\n\treturn pointOnLine + lineDirection * ( dot( planeNormal, pointOnPlane - pointOnLine ) / dot( planeNormal, lineDirection ) );\\n}\\nfloat calcLightAttenuation( float lightDistance, float cutoffDistance, float decayExponent ) {\\n\tif ( decayExponent > 0.0 ) {\\n\t  return pow( saturate( 1.0 - lightDistance / cutoffDistance ), decayExponent );\\n\t}\\n\treturn 1.0;\\n}\\n\\nvec3 inputToLinear( in vec3 a ) {\\n#ifdef GAMMA_INPUT\\n\treturn pow( a, vec3( float( GAMMA_FACTOR ) ) );\\n#else\\n\treturn a;\\n#endif\\n}\\nvec3 linearToOutput( in vec3 a ) {\\n#ifdef GAMMA_OUTPUT\\n\treturn pow( a, vec3( 1.0 / float( GAMMA_FACTOR ) ) );\\n#else\\n\treturn a;\\n#endif\\n}\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/alphatest_fragment.glsl\n\nTHREE.ShaderChunk['alphatest_fragment'] = \"#ifdef ALPHATEST\\n\\n\tif ( diffuseColor.a < ALPHATEST ) discard;\\n\\n#endif\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/lights_lambert_vertex.glsl\n\nTHREE.ShaderChunk['lights_lambert_vertex'] = \"vLightFront = vec3( 0.0 );\\n\\n#ifdef DOUBLE_SIDED\\n\\n\tvLightBack = vec3( 0.0 );\\n\\n#endif\\n\\ntransformedNormal = normalize( transformedNormal );\\n\\n#if MAX_DIR_LIGHTS > 0\\n\\nfor( int i = 0; i < MAX_DIR_LIGHTS; i ++ ) {\\n\\n\tvec3 dirVector = transformDirection( directionalLightDirection[ i ], viewMatrix );\\n\\n\tfloat dotProduct = dot( transformedNormal, dirVector );\\n\tvec3 directionalLightWeighting = vec3( max( dotProduct, 0.0 ) );\\n\\n\t#ifdef DOUBLE_SIDED\\n\\n\t\tvec3 directionalLightWeightingBack = vec3( max( -dotProduct, 0.0 ) );\\n\\n\t\t#ifdef WRAP_AROUND\\n\\n\t\t\tvec3 directionalLightWeightingHalfBack = vec3( max( -0.5 * dotProduct + 0.5, 0.0 ) );\\n\\n\t\t#endif\\n\\n\t#endif\\n\\n\t#ifdef WRAP_AROUND\\n\\n\t\tvec3 directionalLightWeightingHalf = vec3( max( 0.5 * dotProduct + 0.5, 0.0 ) );\\n\t\tdirectionalLightWeighting = mix( directionalLightWeighting, directionalLightWeightingHalf, wrapRGB );\\n\\n\t\t#ifdef DOUBLE_SIDED\\n\\n\t\t\tdirectionalLightWeightingBack = mix( directionalLightWeightingBack, directionalLightWeightingHalfBack, wrapRGB );\\n\\n\t\t#endif\\n\\n\t#endif\\n\\n\tvLightFront += directionalLightColor[ i ] * directionalLightWeighting;\\n\\n\t#ifdef DOUBLE_SIDED\\n\\n\t\tvLightBack += directionalLightColor[ i ] * directionalLightWeightingBack;\\n\\n\t#endif\\n\\n}\\n\\n#endif\\n\\n#if MAX_POINT_LIGHTS > 0\\n\\n\tfor( int i = 0; i < MAX_POINT_LIGHTS; i ++ ) {\\n\\n\t\tvec4 lPosition = viewMatrix * vec4( pointLightPosition[ i ], 1.0 );\\n\t\tvec3 lVector = lPosition.xyz - mvPosition.xyz;\\n\\n\t\tfloat attenuation = calcLightAttenuation( length( lVector ), pointLightDistance[ i ], pointLightDecay[ i ] );\\n\\n\t\tlVector = normalize( lVector );\\n\t\tfloat dotProduct = dot( transformedNormal, lVector );\\n\\n\t\tvec3 pointLightWeighting = vec3( max( dotProduct, 0.0 ) );\\n\\n\t\t#ifdef DOUBLE_SIDED\\n\\n\t\t\tvec3 pointLightWeightingBack = vec3( max( -dotProduct, 0.0 ) );\\n\\n\t\t\t#ifdef WRAP_AROUND\\n\\n\t\t\t\tvec3 pointLightWeightingHalfBack = vec3( max( -0.5 * dotProduct + 0.5, 0.0 ) );\\n\\n\t\t\t#endif\\n\\n\t\t#endif\\n\\n\t\t#ifdef WRAP_AROUND\\n\\n\t\t\tvec3 pointLightWeightingHalf = vec3( max( 0.5 * dotProduct + 0.5, 0.0 ) );\\n\t\t\tpointLightWeighting = mix( pointLightWeighting, pointLightWeightingHalf, wrapRGB );\\n\\n\t\t\t#ifdef DOUBLE_SIDED\\n\\n\t\t\t\tpointLightWeightingBack = mix( pointLightWeightingBack, pointLightWeightingHalfBack, wrapRGB );\\n\\n\t\t\t#endif\\n\\n\t\t#endif\\n\\n\t\tvLightFront += pointLightColor[ i ] * pointLightWeighting * attenuation;\\n\\n\t\t#ifdef DOUBLE_SIDED\\n\\n\t\t\tvLightBack += pointLightColor[ i ] * pointLightWeightingBack * attenuation;\\n\\n\t\t#endif\\n\\n\t}\\n\\n#endif\\n\\n#if MAX_SPOT_LIGHTS > 0\\n\\n\tfor( int i = 0; i < MAX_SPOT_LIGHTS; i ++ ) {\\n\\n\t\tvec4 lPosition = viewMatrix * vec4( spotLightPosition[ i ], 1.0 );\\n\t\tvec3 lVector = lPosition.xyz - mvPosition.xyz;\\n\\n\t\tfloat spotEffect = dot( spotLightDirection[ i ], normalize( spotLightPosition[ i ] - worldPosition.xyz ) );\\n\\n\t\tif ( spotEffect > spotLightAngleCos[ i ] ) {\\n\\n\t\t\tspotEffect = max( pow( max( spotEffect, 0.0 ), spotLightExponent[ i ] ), 0.0 );\\n\\n\t\t\tfloat attenuation = calcLightAttenuation( length( lVector ), spotLightDistance[ i ], spotLightDecay[ i ] );\\n\\n\t\t\tlVector = normalize( lVector );\\n\\n\t\t\tfloat dotProduct = dot( transformedNormal, lVector );\\n\t\t\tvec3 spotLightWeighting = vec3( max( dotProduct, 0.0 ) );\\n\\n\t\t\t#ifdef DOUBLE_SIDED\\n\\n\t\t\t\tvec3 spotLightWeightingBack = vec3( max( -dotProduct, 0.0 ) );\\n\\n\t\t\t\t#ifdef WRAP_AROUND\\n\\n\t\t\t\t\tvec3 spotLightWeightingHalfBack = vec3( max( -0.5 * dotProduct + 0.5, 0.0 ) );\\n\\n\t\t\t\t#endif\\n\\n\t\t\t#endif\\n\\n\t\t\t#ifdef WRAP_AROUND\\n\\n\t\t\t\tvec3 spotLightWeightingHalf = vec3( max( 0.5 * dotProduct + 0.5, 0.0 ) );\\n\t\t\t\tspotLightWeighting = mix( spotLightWeighting, spotLightWeightingHalf, wrapRGB );\\n\\n\t\t\t\t#ifdef DOUBLE_SIDED\\n\\n\t\t\t\t\tspotLightWeightingBack = mix( spotLightWeightingBack, spotLightWeightingHalfBack, wrapRGB );\\n\\n\t\t\t\t#endif\\n\\n\t\t\t#endif\\n\\n\t\t\tvLightFront += spotLightColor[ i ] * spotLightWeighting * attenuation * spotEffect;\\n\\n\t\t\t#ifdef DOUBLE_SIDED\\n\\n\t\t\t\tvLightBack += spotLightColor[ i ] * spotLightWeightingBack * attenuation * spotEffect;\\n\\n\t\t\t#endif\\n\\n\t\t}\\n\\n\t}\\n\\n#endif\\n\\n#if MAX_HEMI_LIGHTS > 0\\n\\n\tfor( int i = 0; i < MAX_HEMI_LIGHTS; i ++ ) {\\n\\n\t\tvec3 lVector = transformDirection( hemisphereLightDirection[ i ], viewMatrix );\\n\\n\t\tfloat dotProduct = dot( transformedNormal, lVector );\\n\\n\t\tfloat hemiDiffuseWeight = 0.5 * dotProduct + 0.5;\\n\t\tfloat hemiDiffuseWeightBack = -0.5 * dotProduct + 0.5;\\n\\n\t\tvLightFront += mix( hemisphereLightGroundColor[ i ], hemisphereLightSkyColor[ i ], hemiDiffuseWeight );\\n\\n\t\t#ifdef DOUBLE_SIDED\\n\\n\t\t\tvLightBack += mix( hemisphereLightGroundColor[ i ], hemisphereLightSkyColor[ i ], hemiDiffuseWeightBack );\\n\\n\t\t#endif\\n\\n\t}\\n\\n#endif\\n\\nvLightFront += ambientLightColor;\\n\\n#ifdef DOUBLE_SIDED\\n\\n\tvLightBack += ambientLightColor;\\n\\n#endif\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/map_particle_pars_fragment.glsl\n\nTHREE.ShaderChunk['map_particle_pars_fragment'] = \"#ifdef USE_MAP\\n\\n\tuniform vec4 offsetRepeat;\\n\tuniform sampler2D map;\\n\\n#endif\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/default_vertex.glsl\n\nTHREE.ShaderChunk['default_vertex'] = \"#ifdef USE_SKINNING\\n\\n\tvec4 mvPosition = modelViewMatrix * skinned;\\n\\n#elif defined( USE_MORPHTARGETS )\\n\\n\tvec4 mvPosition = modelViewMatrix * vec4( morphed, 1.0 );\\n\\n#else\\n\\n\tvec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );\\n\\n#endif\\n\\ngl_Position = projectionMatrix * mvPosition;\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/map_pars_fragment.glsl\n\nTHREE.ShaderChunk['map_pars_fragment'] = \"#if defined( USE_MAP ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( USE_SPECULARMAP ) || defined( USE_ALPHAMAP )\\n\\n\tvarying vec2 vUv;\\n\\n#endif\\n\\n#ifdef USE_MAP\\n\\n\tuniform sampler2D map;\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/skinnormal_vertex.glsl\n\nTHREE.ShaderChunk['skinnormal_vertex'] = \"#ifdef USE_SKINNING\\n\\n\tmat4 skinMatrix = mat4( 0.0 );\\n\tskinMatrix += skinWeight.x * boneMatX;\\n\tskinMatrix += skinWeight.y * boneMatY;\\n\tskinMatrix += skinWeight.z * boneMatZ;\\n\tskinMatrix += skinWeight.w * boneMatW;\\n\tskinMatrix  = bindMatrixInverse * skinMatrix * bindMatrix;\\n\\n\t#ifdef USE_MORPHNORMALS\\n\\n\tvec4 skinnedNormal = skinMatrix * vec4( morphedNormal, 0.0 );\\n\\n\t#else\\n\\n\tvec4 skinnedNormal = skinMatrix * vec4( normal, 0.0 );\\n\\n\t#endif\\n\\n#endif\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/logdepthbuf_pars_vertex.glsl\n\nTHREE.ShaderChunk['logdepthbuf_pars_vertex'] = \"#ifdef USE_LOGDEPTHBUF\\n\\n\t#ifdef USE_LOGDEPTHBUF_EXT\\n\\n\t\tvarying float vFragDepth;\\n\\n\t#endif\\n\\n\tuniform float logDepthBufFC;\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/lightmap_pars_vertex.glsl\n\nTHREE.ShaderChunk['lightmap_pars_vertex'] = \"#ifdef USE_LIGHTMAP\\n\\n\tvarying vec2 vUv2;\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/lights_phong_fragment.glsl\n\nTHREE.ShaderChunk['lights_phong_fragment'] = \"#ifndef FLAT_SHADED\\n\\n\tvec3 normal = normalize( vNormal );\\n\\n\t#ifdef DOUBLE_SIDED\\n\\n\t\tnormal = normal * ( -1.0 + 2.0 * float( gl_FrontFacing ) );\\n\\n\t#endif\\n\\n#else\\n\\n\tvec3 fdx = dFdx( vViewPosition );\\n\tvec3 fdy = dFdy( vViewPosition );\\n\tvec3 normal = normalize( cross( fdx, fdy ) );\\n\\n#endif\\n\\nvec3 viewPosition = normalize( vViewPosition );\\n\\n#ifdef USE_NORMALMAP\\n\\n\tnormal = perturbNormal2Arb( -vViewPosition, normal );\\n\\n#elif defined( USE_BUMPMAP )\\n\\n\tnormal = perturbNormalArb( -vViewPosition, normal, dHdxy_fwd() );\\n\\n#endif\\n\\nvec3 totalDiffuseLight = vec3( 0.0 );\\nvec3 totalSpecularLight = vec3( 0.0 );\\n\\n#if MAX_POINT_LIGHTS > 0\\n\\n\tfor ( int i = 0; i < MAX_POINT_LIGHTS; i ++ ) {\\n\\n\t\tvec4 lPosition = viewMatrix * vec4( pointLightPosition[ i ], 1.0 );\\n\t\tvec3 lVector = lPosition.xyz + vViewPosition.xyz;\\n\\n\t\tfloat attenuation = calcLightAttenuation( length( lVector ), pointLightDistance[ i ], pointLightDecay[ i ] );\\n\\n\t\tlVector = normalize( lVector );\\n\\n\t\t// diffuse\\n\\n\t\tfloat dotProduct = dot( normal, lVector );\\n\\n\t\t#ifdef WRAP_AROUND\\n\\n\t\t\tfloat pointDiffuseWeightFull = max( dotProduct, 0.0 );\\n\t\t\tfloat pointDiffuseWeightHalf = max( 0.5 * dotProduct + 0.5, 0.0 );\\n\\n\t\t\tvec3 pointDiffuseWeight = mix( vec3( pointDiffuseWeightFull ), vec3( pointDiffuseWeightHalf ), wrapRGB );\\n\\n\t\t#else\\n\\n\t\t\tfloat pointDiffuseWeight = max( dotProduct, 0.0 );\\n\\n\t\t#endif\\n\\n\t\ttotalDiffuseLight += pointLightColor[ i ] * pointDiffuseWeight * attenuation;\\n\\n\t\t\t\t// specular\\n\\n\t\tvec3 pointHalfVector = normalize( lVector + viewPosition );\\n\t\tfloat pointDotNormalHalf = max( dot( normal, pointHalfVector ), 0.0 );\\n\t\tfloat pointSpecularWeight = specularStrength * max( pow( pointDotNormalHalf, shininess ), 0.0 );\\n\\n\t\tfloat specularNormalization = ( shininess + 2.0 ) / 8.0;\\n\\n\t\tvec3 schlick = specular + vec3( 1.0 - specular ) * pow( max( 1.0 - dot( lVector, pointHalfVector ), 0.0 ), 5.0 );\\n\t\ttotalSpecularLight += schlick * pointLightColor[ i ] * pointSpecularWeight * pointDiffuseWeight * attenuation * specularNormalization;\\n\\n\t}\\n\\n#endif\\n\\n#if MAX_SPOT_LIGHTS > 0\\n\\n\tfor ( int i = 0; i < MAX_SPOT_LIGHTS; i ++ ) {\\n\\n\t\tvec4 lPosition = viewMatrix * vec4( spotLightPosition[ i ], 1.0 );\\n\t\tvec3 lVector = lPosition.xyz + vViewPosition.xyz;\\n\\n\t\tfloat attenuation = calcLightAttenuation( length( lVector ), spotLightDistance[ i ], spotLightDecay[ i ] );\\n\\n\t\tlVector = normalize( lVector );\\n\\n\t\tfloat spotEffect = dot( spotLightDirection[ i ], normalize( spotLightPosition[ i ] - vWorldPosition ) );\\n\\n\t\tif ( spotEffect > spotLightAngleCos[ i ] ) {\\n\\n\t\t\tspotEffect = max( pow( max( spotEffect, 0.0 ), spotLightExponent[ i ] ), 0.0 );\\n\\n\t\t\t// diffuse\\n\\n\t\t\tfloat dotProduct = dot( normal, lVector );\\n\\n\t\t\t#ifdef WRAP_AROUND\\n\\n\t\t\t\tfloat spotDiffuseWeightFull = max( dotProduct, 0.0 );\\n\t\t\t\tfloat spotDiffuseWeightHalf = max( 0.5 * dotProduct + 0.5, 0.0 );\\n\\n\t\t\t\tvec3 spotDiffuseWeight = mix( vec3( spotDiffuseWeightFull ), vec3( spotDiffuseWeightHalf ), wrapRGB );\\n\\n\t\t\t#else\\n\\n\t\t\t\tfloat spotDiffuseWeight = max( dotProduct, 0.0 );\\n\\n\t\t\t#endif\\n\\n\t\t\ttotalDiffuseLight += spotLightColor[ i ] * spotDiffuseWeight * attenuation * spotEffect;\\n\\n\t\t\t// specular\\n\\n\t\t\tvec3 spotHalfVector = normalize( lVector + viewPosition );\\n\t\t\tfloat spotDotNormalHalf = max( dot( normal, spotHalfVector ), 0.0 );\\n\t\t\tfloat spotSpecularWeight = specularStrength * max( pow( spotDotNormalHalf, shininess ), 0.0 );\\n\\n\t\t\tfloat specularNormalization = ( shininess + 2.0 ) / 8.0;\\n\\n\t\t\tvec3 schlick = specular + vec3( 1.0 - specular ) * pow( max( 1.0 - dot( lVector, spotHalfVector ), 0.0 ), 5.0 );\\n\t\t\ttotalSpecularLight += schlick * spotLightColor[ i ] * spotSpecularWeight * spotDiffuseWeight * attenuation * specularNormalization * spotEffect;\\n\\n\t\t}\\n\\n\t}\\n\\n#endif\\n\\n#if MAX_DIR_LIGHTS > 0\\n\\n\tfor( int i = 0; i < MAX_DIR_LIGHTS; i ++ ) {\\n\\n\t\tvec3 dirVector = transformDirection( directionalLightDirection[ i ], viewMatrix );\\n\\n\t\t// diffuse\\n\\n\t\tfloat dotProduct = dot( normal, dirVector );\\n\\n\t\t#ifdef WRAP_AROUND\\n\\n\t\t\tfloat dirDiffuseWeightFull = max( dotProduct, 0.0 );\\n\t\t\tfloat dirDiffuseWeightHalf = max( 0.5 * dotProduct + 0.5, 0.0 );\\n\\n\t\t\tvec3 dirDiffuseWeight = mix( vec3( dirDiffuseWeightFull ), vec3( dirDiffuseWeightHalf ), wrapRGB );\\n\\n\t\t#else\\n\\n\t\t\tfloat dirDiffuseWeight = max( dotProduct, 0.0 );\\n\\n\t\t#endif\\n\\n\t\ttotalDiffuseLight += directionalLightColor[ i ] * dirDiffuseWeight;\\n\\n\t\t// specular\\n\\n\t\tvec3 dirHalfVector = normalize( dirVector + viewPosition );\\n\t\tfloat dirDotNormalHalf = max( dot( normal, dirHalfVector ), 0.0 );\\n\t\tfloat dirSpecularWeight = specularStrength * max( pow( dirDotNormalHalf, shininess ), 0.0 );\\n\\n\t\t/*\\n\t\t// fresnel term from skin shader\\n\t\tconst float F0 = 0.128;\\n\\n\t\tfloat base = 1.0 - dot( viewPosition, dirHalfVector );\\n\t\tfloat exponential = pow( base, 5.0 );\\n\\n\t\tfloat fresnel = exponential + F0 * ( 1.0 - exponential );\\n\t\t*/\\n\\n\t\t/*\\n\t\t// fresnel term from fresnel shader\\n\t\tconst float mFresnelBias = 0.08;\\n\t\tconst float mFresnelScale = 0.3;\\n\t\tconst float mFresnelPower = 5.0;\\n\\n\t\tfloat fresnel = mFresnelBias + mFresnelScale * pow( 1.0 + dot( normalize( -viewPosition ), normal ), mFresnelPower );\\n\t\t*/\\n\\n\t\tfloat specularNormalization = ( shininess + 2.0 ) / 8.0;\\n\\n\t\t// \t\tdirSpecular += specular * directionalLightColor[ i ] * dirSpecularWeight * dirDiffuseWeight * specularNormalization * fresnel;\\n\\n\t\tvec3 schlick = specular + vec3( 1.0 - specular ) * pow( max( 1.0 - dot( dirVector, dirHalfVector ), 0.0 ), 5.0 );\\n\t\ttotalSpecularLight += schlick * directionalLightColor[ i ] * dirSpecularWeight * dirDiffuseWeight * specularNormalization;\\n\\n\\n\t}\\n\\n#endif\\n\\n#if MAX_HEMI_LIGHTS > 0\\n\\n\tfor( int i = 0; i < MAX_HEMI_LIGHTS; i ++ ) {\\n\\n\t\tvec3 lVector = transformDirection( hemisphereLightDirection[ i ], viewMatrix );\\n\\n\t\t// diffuse\\n\\n\t\tfloat dotProduct = dot( normal, lVector );\\n\t\tfloat hemiDiffuseWeight = 0.5 * dotProduct + 0.5;\\n\\n\t\tvec3 hemiColor = mix( hemisphereLightGroundColor[ i ], hemisphereLightSkyColor[ i ], hemiDiffuseWeight );\\n\\n\t\ttotalDiffuseLight += hemiColor;\\n\\n\t\t// specular (sky light)\\n\\n\t\tvec3 hemiHalfVectorSky = normalize( lVector + viewPosition );\\n\t\tfloat hemiDotNormalHalfSky = 0.5 * dot( normal, hemiHalfVectorSky ) + 0.5;\\n\t\tfloat hemiSpecularWeightSky = specularStrength * max( pow( max( hemiDotNormalHalfSky, 0.0 ), shininess ), 0.0 );\\n\\n\t\t// specular (ground light)\\n\\n\t\tvec3 lVectorGround = -lVector;\\n\\n\t\tvec3 hemiHalfVectorGround = normalize( lVectorGround + viewPosition );\\n\t\tfloat hemiDotNormalHalfGround = 0.5 * dot( normal, hemiHalfVectorGround ) + 0.5;\\n\t\tfloat hemiSpecularWeightGround = specularStrength * max( pow( max( hemiDotNormalHalfGround, 0.0 ), shininess ), 0.0 );\\n\\n\t\tfloat dotProductGround = dot( normal, lVectorGround );\\n\\n\t\tfloat specularNormalization = ( shininess + 2.0 ) / 8.0;\\n\\n\t\tvec3 schlickSky = specular + vec3( 1.0 - specular ) * pow( max( 1.0 - dot( lVector, hemiHalfVectorSky ), 0.0 ), 5.0 );\\n\t\tvec3 schlickGround = specular + vec3( 1.0 - specular ) * pow( max( 1.0 - dot( lVectorGround, hemiHalfVectorGround ), 0.0 ), 5.0 );\\n\t\ttotalSpecularLight += hemiColor * specularNormalization * ( schlickSky * hemiSpecularWeightSky * max( dotProduct, 0.0 ) + schlickGround * hemiSpecularWeightGround * max( dotProductGround, 0.0 ) );\\n\\n\t}\\n\\n#endif\\n\\n#ifdef METAL\\n\\n\toutgoingLight += diffuseColor.rgb * ( totalDiffuseLight + ambientLightColor ) * specular + totalSpecularLight + emissive;\\n\\n#else\\n\\n\toutgoingLight += diffuseColor.rgb * ( totalDiffuseLight + ambientLightColor ) + totalSpecularLight + emissive;\\n\\n#endif\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/fog_pars_fragment.glsl\n\nTHREE.ShaderChunk['fog_pars_fragment'] = \"#ifdef USE_FOG\\n\\n\tuniform vec3 fogColor;\\n\\n\t#ifdef FOG_EXP2\\n\\n\t\tuniform float fogDensity;\\n\\n\t#else\\n\\n\t\tuniform float fogNear;\\n\t\tuniform float fogFar;\\n\t#endif\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/morphnormal_vertex.glsl\n\nTHREE.ShaderChunk['morphnormal_vertex'] = \"#ifdef USE_MORPHNORMALS\\n\\n\tvec3 morphedNormal = vec3( 0.0 );\\n\\n\tmorphedNormal += ( morphNormal0 - normal ) * morphTargetInfluences[ 0 ];\\n\tmorphedNormal += ( morphNormal1 - normal ) * morphTargetInfluences[ 1 ];\\n\tmorphedNormal += ( morphNormal2 - normal ) * morphTargetInfluences[ 2 ];\\n\tmorphedNormal += ( morphNormal3 - normal ) * morphTargetInfluences[ 3 ];\\n\\n\tmorphedNormal += normal;\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/envmap_pars_fragment.glsl\n\nTHREE.ShaderChunk['envmap_pars_fragment'] = \"#ifdef USE_ENVMAP\\n\\n\tuniform float reflectivity;\\n\t#ifdef ENVMAP_TYPE_CUBE\\n\t\tuniform samplerCube envMap;\\n\t#else\\n\t\tuniform sampler2D envMap;\\n\t#endif\\n\tuniform float flipEnvMap;\\n\\n\t#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG )\\n\\n\t\tuniform float refractionRatio;\\n\\n\t#else\\n\\n\t\tvarying vec3 vReflect;\\n\\n\t#endif\\n\\n#endif\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/logdepthbuf_fragment.glsl\n\nTHREE.ShaderChunk['logdepthbuf_fragment'] = \"#if defined(USE_LOGDEPTHBUF) && defined(USE_LOGDEPTHBUF_EXT)\\n\\n\tgl_FragDepthEXT = log2(vFragDepth) * logDepthBufFC * 0.5;\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/normalmap_pars_fragment.glsl\n\nTHREE.ShaderChunk['normalmap_pars_fragment'] = \"#ifdef USE_NORMALMAP\\n\\n\tuniform sampler2D normalMap;\\n\tuniform vec2 normalScale;\\n\\n\t// Per-Pixel Tangent Space Normal Mapping\\n\t// http://hacksoflife.blogspot.ch/2009/11/per-pixel-tangent-space-normal-mapping.html\\n\\n\tvec3 perturbNormal2Arb( vec3 eye_pos, vec3 surf_norm ) {\\n\\n\t\tvec3 q0 = dFdx( eye_pos.xyz );\\n\t\tvec3 q1 = dFdy( eye_pos.xyz );\\n\t\tvec2 st0 = dFdx( vUv.st );\\n\t\tvec2 st1 = dFdy( vUv.st );\\n\\n\t\tvec3 S = normalize( q0 * st1.t - q1 * st0.t );\\n\t\tvec3 T = normalize( -q0 * st1.s + q1 * st0.s );\\n\t\tvec3 N = normalize( surf_norm );\\n\\n\t\tvec3 mapN = texture2D( normalMap, vUv ).xyz * 2.0 - 1.0;\\n\t\tmapN.xy = normalScale * mapN.xy;\\n\t\tmat3 tsn = mat3( S, T, N );\\n\t\treturn normalize( tsn * mapN );\\n\\n\t}\\n\\n#endif\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/lights_phong_pars_vertex.glsl\n\nTHREE.ShaderChunk['lights_phong_pars_vertex'] = \"#if MAX_SPOT_LIGHTS > 0 || defined( USE_BUMPMAP ) || defined( USE_ENVMAP )\\n\\n\tvarying vec3 vWorldPosition;\\n\\n#endif\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/lightmap_pars_fragment.glsl\n\nTHREE.ShaderChunk['lightmap_pars_fragment'] = \"#ifdef USE_LIGHTMAP\\n\\n\tvarying vec2 vUv2;\\n\tuniform sampler2D lightMap;\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/shadowmap_vertex.glsl\n\nTHREE.ShaderChunk['shadowmap_vertex'] = \"#ifdef USE_SHADOWMAP\\n\\n\tfor( int i = 0; i < MAX_SHADOWS; i ++ ) {\\n\\n\t\tvShadowCoord[ i ] = shadowMatrix[ i ] * worldPosition;\\n\\n\t}\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/lights_phong_vertex.glsl\n\nTHREE.ShaderChunk['lights_phong_vertex'] = \"#if MAX_SPOT_LIGHTS > 0 || defined( USE_BUMPMAP ) || defined( USE_ENVMAP )\\n\\n\tvWorldPosition = worldPosition.xyz;\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/map_fragment.glsl\n\nTHREE.ShaderChunk['map_fragment'] = \"#ifdef USE_MAP\\n\\n\tvec4 texelColor = texture2D( map, vUv );\\n\\n\ttexelColor.xyz = inputToLinear( texelColor.xyz );\\n\\n\tdiffuseColor *= texelColor;\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/lightmap_vertex.glsl\n\nTHREE.ShaderChunk['lightmap_vertex'] = \"#ifdef USE_LIGHTMAP\\n\\n\tvUv2 = uv2;\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/map_particle_fragment.glsl\n\nTHREE.ShaderChunk['map_particle_fragment'] = \"#ifdef USE_MAP\\n\\n\tdiffuseColor *= texture2D( map, vec2( gl_PointCoord.x, 1.0 - gl_PointCoord.y ) * offsetRepeat.zw + offsetRepeat.xy );\\n\\n#endif\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/color_pars_fragment.glsl\n\nTHREE.ShaderChunk['color_pars_fragment'] = \"#ifdef USE_COLOR\\n\\n\tvarying vec3 vColor;\\n\\n#endif\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/color_vertex.glsl\n\nTHREE.ShaderChunk['color_vertex'] = \"#ifdef USE_COLOR\\n\\n\tvColor.xyz = inputToLinear( color.xyz );\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/skinning_vertex.glsl\n\nTHREE.ShaderChunk['skinning_vertex'] = \"#ifdef USE_SKINNING\\n\\n\t#ifdef USE_MORPHTARGETS\\n\\n\tvec4 skinVertex = bindMatrix * vec4( morphed, 1.0 );\\n\\n\t#else\\n\\n\tvec4 skinVertex = bindMatrix * vec4( position, 1.0 );\\n\\n\t#endif\\n\\n\tvec4 skinned = vec4( 0.0 );\\n\tskinned += boneMatX * skinVertex * skinWeight.x;\\n\tskinned += boneMatY * skinVertex * skinWeight.y;\\n\tskinned += boneMatZ * skinVertex * skinWeight.z;\\n\tskinned += boneMatW * skinVertex * skinWeight.w;\\n\tskinned  = bindMatrixInverse * skinned;\\n\\n#endif\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/envmap_pars_vertex.glsl\n\nTHREE.ShaderChunk['envmap_pars_vertex'] = \"#if defined( USE_ENVMAP ) && ! defined( USE_BUMPMAP ) && ! defined( USE_NORMALMAP ) && ! defined( PHONG )\\n\\n\tvarying vec3 vReflect;\\n\\n\tuniform float refractionRatio;\\n\\n#endif\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/linear_to_gamma_fragment.glsl\n\nTHREE.ShaderChunk['linear_to_gamma_fragment'] = \"\\n\toutgoingLight = linearToOutput( outgoingLight );\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/color_pars_vertex.glsl\n\nTHREE.ShaderChunk['color_pars_vertex'] = \"#ifdef USE_COLOR\\n\\n\tvarying vec3 vColor;\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/lights_lambert_pars_vertex.glsl\n\nTHREE.ShaderChunk['lights_lambert_pars_vertex'] = \"uniform vec3 ambientLightColor;\\n\\n#if MAX_DIR_LIGHTS > 0\\n\\n\tuniform vec3 directionalLightColor[ MAX_DIR_LIGHTS ];\\n\tuniform vec3 directionalLightDirection[ MAX_DIR_LIGHTS ];\\n\\n#endif\\n\\n#if MAX_HEMI_LIGHTS > 0\\n\\n\tuniform vec3 hemisphereLightSkyColor[ MAX_HEMI_LIGHTS ];\\n\tuniform vec3 hemisphereLightGroundColor[ MAX_HEMI_LIGHTS ];\\n\tuniform vec3 hemisphereLightDirection[ MAX_HEMI_LIGHTS ];\\n\\n#endif\\n\\n#if MAX_POINT_LIGHTS > 0\\n\\n\tuniform vec3 pointLightColor[ MAX_POINT_LIGHTS ];\\n\tuniform vec3 pointLightPosition[ MAX_POINT_LIGHTS ];\\n\tuniform float pointLightDistance[ MAX_POINT_LIGHTS ];\\n\tuniform float pointLightDecay[ MAX_POINT_LIGHTS ];\\n\\n#endif\\n\\n#if MAX_SPOT_LIGHTS > 0\\n\\n\tuniform vec3 spotLightColor[ MAX_SPOT_LIGHTS ];\\n\tuniform vec3 spotLightPosition[ MAX_SPOT_LIGHTS ];\\n\tuniform vec3 spotLightDirection[ MAX_SPOT_LIGHTS ];\\n\tuniform float spotLightDistance[ MAX_SPOT_LIGHTS ];\\n\tuniform float spotLightAngleCos[ MAX_SPOT_LIGHTS ];\\n\tuniform float spotLightExponent[ MAX_SPOT_LIGHTS ];\\n\tuniform float spotLightDecay[ MAX_SPOT_LIGHTS ];\\n\\n#endif\\n\\n#ifdef WRAP_AROUND\\n\\n\tuniform vec3 wrapRGB;\\n\\n#endif\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/map_pars_vertex.glsl\n\nTHREE.ShaderChunk['map_pars_vertex'] = \"#if defined( USE_MAP ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( USE_SPECULARMAP ) || defined( USE_ALPHAMAP )\\n\\n\tvarying vec2 vUv;\\n\tuniform vec4 offsetRepeat;\\n\\n#endif\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/envmap_fragment.glsl\n\nTHREE.ShaderChunk['envmap_fragment'] = \"#ifdef USE_ENVMAP\\n\\n\t#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG )\\n\\n\t\tvec3 cameraToVertex = normalize( vWorldPosition - cameraPosition );\\n\\n\t\t// Transforming Normal Vectors with the Inverse Transformation\\n\t\tvec3 worldNormal = inverseTransformDirection( normal, viewMatrix );\\n\\n\t\t#ifdef ENVMAP_MODE_REFLECTION\\n\\n\t\t\tvec3 reflectVec = reflect( cameraToVertex, worldNormal );\\n\\n\t\t#else\\n\\n\t\t\tvec3 reflectVec = refract( cameraToVertex, worldNormal, refractionRatio );\\n\\n\t\t#endif\\n\\n\t#else\\n\\n\t\tvec3 reflectVec = vReflect;\\n\\n\t#endif\\n\\n\t#ifdef DOUBLE_SIDED\\n\t\tfloat flipNormal = ( -1.0 + 2.0 * float( gl_FrontFacing ) );\\n\t#else\\n\t\tfloat flipNormal = 1.0;\\n\t#endif\\n\\n\t#ifdef ENVMAP_TYPE_CUBE\\n\t\tvec4 envColor = textureCube( envMap, flipNormal * vec3( flipEnvMap * reflectVec.x, reflectVec.yz ) );\\n\\n\t#elif defined( ENVMAP_TYPE_EQUIREC )\\n\t\tvec2 sampleUV;\\n\t\tsampleUV.y = saturate( flipNormal * reflectVec.y * 0.5 + 0.5 );\\n\t\tsampleUV.x = atan( flipNormal * reflectVec.z, flipNormal * reflectVec.x ) * RECIPROCAL_PI2 + 0.5;\\n\t\tvec4 envColor = texture2D( envMap, sampleUV );\\n\\n\t#elif defined( ENVMAP_TYPE_SPHERE )\\n\t\tvec3 reflectView = flipNormal * normalize((viewMatrix * vec4( reflectVec, 0.0 )).xyz + vec3(0.0,0.0,1.0));\\n\t\tvec4 envColor = texture2D( envMap, reflectView.xy * 0.5 + 0.5 );\\n\t#endif\\n\\n\tenvColor.xyz = inputToLinear( envColor.xyz );\\n\\n\t#ifdef ENVMAP_BLENDING_MULTIPLY\\n\\n\t\toutgoingLight = mix( outgoingLight, outgoingLight * envColor.xyz, specularStrength * reflectivity );\\n\\n\t#elif defined( ENVMAP_BLENDING_MIX )\\n\\n\t\toutgoingLight = mix( outgoingLight, envColor.xyz, specularStrength * reflectivity );\\n\\n\t#elif defined( ENVMAP_BLENDING_ADD )\\n\\n\t\toutgoingLight += envColor.xyz * specularStrength * reflectivity;\\n\\n\t#endif\\n\\n#endif\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/specularmap_pars_fragment.glsl\n\nTHREE.ShaderChunk['specularmap_pars_fragment'] = \"#ifdef USE_SPECULARMAP\\n\\n\tuniform sampler2D specularMap;\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/logdepthbuf_vertex.glsl\n\nTHREE.ShaderChunk['logdepthbuf_vertex'] = \"#ifdef USE_LOGDEPTHBUF\\n\\n\tgl_Position.z = log2(max( EPSILON, gl_Position.w + 1.0 )) * logDepthBufFC;\\n\\n\t#ifdef USE_LOGDEPTHBUF_EXT\\n\\n\t\tvFragDepth = 1.0 + gl_Position.w;\\n\\n#else\\n\\n\t\tgl_Position.z = (gl_Position.z - 1.0) * gl_Position.w;\\n\\n\t#endif\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/morphtarget_pars_vertex.glsl\n\nTHREE.ShaderChunk['morphtarget_pars_vertex'] = \"#ifdef USE_MORPHTARGETS\\n\\n\t#ifndef USE_MORPHNORMALS\\n\\n\tuniform float morphTargetInfluences[ 8 ];\\n\\n\t#else\\n\\n\tuniform float morphTargetInfluences[ 4 ];\\n\\n\t#endif\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/specularmap_fragment.glsl\n\nTHREE.ShaderChunk['specularmap_fragment'] = \"float specularStrength;\\n\\n#ifdef USE_SPECULARMAP\\n\\n\tvec4 texelSpecular = texture2D( specularMap, vUv );\\n\tspecularStrength = texelSpecular.r;\\n\\n#else\\n\\n\tspecularStrength = 1.0;\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/fog_fragment.glsl\n\nTHREE.ShaderChunk['fog_fragment'] = \"#ifdef USE_FOG\\n\\n\t#ifdef USE_LOGDEPTHBUF_EXT\\n\\n\t\tfloat depth = gl_FragDepthEXT / gl_FragCoord.w;\\n\\n\t#else\\n\\n\t\tfloat depth = gl_FragCoord.z / gl_FragCoord.w;\\n\\n\t#endif\\n\\n\t#ifdef FOG_EXP2\\n\\n\t\tfloat fogFactor = exp2( - square( fogDensity ) * square( depth ) * LOG2 );\\n\t\tfogFactor = whiteCompliment( fogFactor );\\n\\n\t#else\\n\\n\t\tfloat fogFactor = smoothstep( fogNear, fogFar, depth );\\n\\n\t#endif\\n\t\\n\toutgoingLight = mix( outgoingLight, fogColor, fogFactor );\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/bumpmap_pars_fragment.glsl\n\nTHREE.ShaderChunk['bumpmap_pars_fragment'] = \"#ifdef USE_BUMPMAP\\n\\n\tuniform sampler2D bumpMap;\\n\tuniform float bumpScale;\\n\\n\t// Derivative maps - bump mapping unparametrized surfaces by Morten Mikkelsen\\n\t// http://mmikkelsen3d.blogspot.sk/2011/07/derivative-maps.html\\n\\n\t// Evaluate the derivative of the height w.r.t. screen-space using forward differencing (listing 2)\\n\\n\tvec2 dHdxy_fwd() {\\n\\n\t\tvec2 dSTdx = dFdx( vUv );\\n\t\tvec2 dSTdy = dFdy( vUv );\\n\\n\t\tfloat Hll = bumpScale * texture2D( bumpMap, vUv ).x;\\n\t\tfloat dBx = bumpScale * texture2D( bumpMap, vUv + dSTdx ).x - Hll;\\n\t\tfloat dBy = bumpScale * texture2D( bumpMap, vUv + dSTdy ).x - Hll;\\n\\n\t\treturn vec2( dBx, dBy );\\n\\n\t}\\n\\n\tvec3 perturbNormalArb( vec3 surf_pos, vec3 surf_norm, vec2 dHdxy ) {\\n\\n\t\tvec3 vSigmaX = dFdx( surf_pos );\\n\t\tvec3 vSigmaY = dFdy( surf_pos );\\n\t\tvec3 vN = surf_norm;\t\t// normalized\\n\\n\t\tvec3 R1 = cross( vSigmaY, vN );\\n\t\tvec3 R2 = cross( vN, vSigmaX );\\n\\n\t\tfloat fDet = dot( vSigmaX, R1 );\\n\\n\t\tvec3 vGrad = sign( fDet ) * ( dHdxy.x * R1 + dHdxy.y * R2 );\\n\t\treturn normalize( abs( fDet ) * surf_norm - vGrad );\\n\\n\t}\\n\\n#endif\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/defaultnormal_vertex.glsl\n\nTHREE.ShaderChunk['defaultnormal_vertex'] = \"#ifdef USE_SKINNING\\n\\n\tvec3 objectNormal = skinnedNormal.xyz;\\n\\n#elif defined( USE_MORPHNORMALS )\\n\\n\tvec3 objectNormal = morphedNormal;\\n\\n#else\\n\\n\tvec3 objectNormal = normal;\\n\\n#endif\\n\\n#ifdef FLIP_SIDED\\n\\n\tobjectNormal = -objectNormal;\\n\\n#endif\\n\\nvec3 transformedNormal = normalMatrix * objectNormal;\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/lights_phong_pars_fragment.glsl\n\nTHREE.ShaderChunk['lights_phong_pars_fragment'] = \"uniform vec3 ambientLightColor;\\n\\n#if MAX_DIR_LIGHTS > 0\\n\\n\tuniform vec3 directionalLightColor[ MAX_DIR_LIGHTS ];\\n\tuniform vec3 directionalLightDirection[ MAX_DIR_LIGHTS ];\\n\\n#endif\\n\\n#if MAX_HEMI_LIGHTS > 0\\n\\n\tuniform vec3 hemisphereLightSkyColor[ MAX_HEMI_LIGHTS ];\\n\tuniform vec3 hemisphereLightGroundColor[ MAX_HEMI_LIGHTS ];\\n\tuniform vec3 hemisphereLightDirection[ MAX_HEMI_LIGHTS ];\\n\\n#endif\\n\\n#if MAX_POINT_LIGHTS > 0\\n\\n\tuniform vec3 pointLightColor[ MAX_POINT_LIGHTS ];\\n\\n\tuniform vec3 pointLightPosition[ MAX_POINT_LIGHTS ];\\n\tuniform float pointLightDistance[ MAX_POINT_LIGHTS ];\\n\tuniform float pointLightDecay[ MAX_POINT_LIGHTS ];\\n\\n#endif\\n\\n#if MAX_SPOT_LIGHTS > 0\\n\\n\tuniform vec3 spotLightColor[ MAX_SPOT_LIGHTS ];\\n\tuniform vec3 spotLightPosition[ MAX_SPOT_LIGHTS ];\\n\tuniform vec3 spotLightDirection[ MAX_SPOT_LIGHTS ];\\n\tuniform float spotLightAngleCos[ MAX_SPOT_LIGHTS ];\\n\tuniform float spotLightExponent[ MAX_SPOT_LIGHTS ];\\n\tuniform float spotLightDistance[ MAX_SPOT_LIGHTS ];\\n\tuniform float spotLightDecay[ MAX_SPOT_LIGHTS ];\\n\\n#endif\\n\\n#if MAX_SPOT_LIGHTS > 0 || defined( USE_BUMPMAP ) || defined( USE_ENVMAP )\\n\\n\tvarying vec3 vWorldPosition;\\n\\n#endif\\n\\n#ifdef WRAP_AROUND\\n\\n\tuniform vec3 wrapRGB;\\n\\n#endif\\n\\nvarying vec3 vViewPosition;\\n\\n#ifndef FLAT_SHADED\\n\\n\tvarying vec3 vNormal;\\n\\n#endif\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/skinbase_vertex.glsl\n\nTHREE.ShaderChunk['skinbase_vertex'] = \"#ifdef USE_SKINNING\\n\\n\tmat4 boneMatX = getBoneMatrix( skinIndex.x );\\n\tmat4 boneMatY = getBoneMatrix( skinIndex.y );\\n\tmat4 boneMatZ = getBoneMatrix( skinIndex.z );\\n\tmat4 boneMatW = getBoneMatrix( skinIndex.w );\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/map_vertex.glsl\n\nTHREE.ShaderChunk['map_vertex'] = \"#if defined( USE_MAP ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( USE_SPECULARMAP ) || defined( USE_ALPHAMAP )\\n\\n\tvUv = uv * offsetRepeat.zw + offsetRepeat.xy;\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/lightmap_fragment.glsl\n\nTHREE.ShaderChunk['lightmap_fragment'] = \"#ifdef USE_LIGHTMAP\\n\\n\toutgoingLight *= diffuseColor.xyz * texture2D( lightMap, vUv2 ).xyz;\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/shadowmap_pars_vertex.glsl\n\nTHREE.ShaderChunk['shadowmap_pars_vertex'] = \"#ifdef USE_SHADOWMAP\\n\\n\tvarying vec4 vShadowCoord[ MAX_SHADOWS ];\\n\tuniform mat4 shadowMatrix[ MAX_SHADOWS ];\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/color_fragment.glsl\n\nTHREE.ShaderChunk['color_fragment'] = \"#ifdef USE_COLOR\\n\\n\tdiffuseColor.rgb *= vColor;\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/morphtarget_vertex.glsl\n\nTHREE.ShaderChunk['morphtarget_vertex'] = \"#ifdef USE_MORPHTARGETS\\n\\n\tvec3 morphed = vec3( 0.0 );\\n\tmorphed += ( morphTarget0 - position ) * morphTargetInfluences[ 0 ];\\n\tmorphed += ( morphTarget1 - position ) * morphTargetInfluences[ 1 ];\\n\tmorphed += ( morphTarget2 - position ) * morphTargetInfluences[ 2 ];\\n\tmorphed += ( morphTarget3 - position ) * morphTargetInfluences[ 3 ];\\n\\n\t#ifndef USE_MORPHNORMALS\\n\\n\tmorphed += ( morphTarget4 - position ) * morphTargetInfluences[ 4 ];\\n\tmorphed += ( morphTarget5 - position ) * morphTargetInfluences[ 5 ];\\n\tmorphed += ( morphTarget6 - position ) * morphTargetInfluences[ 6 ];\\n\tmorphed += ( morphTarget7 - position ) * morphTargetInfluences[ 7 ];\\n\\n\t#endif\\n\\n\tmorphed += position;\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/envmap_vertex.glsl\n\nTHREE.ShaderChunk['envmap_vertex'] = \"#if defined( USE_ENVMAP ) && ! defined( USE_BUMPMAP ) && ! defined( USE_NORMALMAP ) && ! defined( PHONG )\\n\\n\tvec3 worldNormal = transformDirection( objectNormal, modelMatrix );\\n\\n\tvec3 cameraToVertex = normalize( worldPosition.xyz - cameraPosition );\\n\\n\t#ifdef ENVMAP_MODE_REFLECTION\\n\\n\t\tvReflect = reflect( cameraToVertex, worldNormal );\\n\\n\t#else\\n\\n\t\tvReflect = refract( cameraToVertex, worldNormal, refractionRatio );\\n\\n\t#endif\\n\\n#endif\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/shadowmap_fragment.glsl\n\nTHREE.ShaderChunk['shadowmap_fragment'] = \"#ifdef USE_SHADOWMAP\\n\\n\t#ifdef SHADOWMAP_DEBUG\\n\\n\t\tvec3 frustumColors[3];\\n\t\tfrustumColors[0] = vec3( 1.0, 0.5, 0.0 );\\n\t\tfrustumColors[1] = vec3( 0.0, 1.0, 0.8 );\\n\t\tfrustumColors[2] = vec3( 0.0, 0.5, 1.0 );\\n\\n\t#endif\\n\\n\t#ifdef SHADOWMAP_CASCADE\\n\\n\t\tint inFrustumCount = 0;\\n\\n\t#endif\\n\\n\tfloat fDepth;\\n\tvec3 shadowColor = vec3( 1.0 );\\n\\n\tfor( int i = 0; i < MAX_SHADOWS; i ++ ) {\\n\\n\t\tvec3 shadowCoord = vShadowCoord[ i ].xyz / vShadowCoord[ i ].w;\\n\\n\t\t\t\t// if ( something && something ) breaks ATI OpenGL shader compiler\\n\t\t\t\t// if ( all( something, something ) ) using this instead\\n\\n\t\tbvec4 inFrustumVec = bvec4 ( shadowCoord.x >= 0.0, shadowCoord.x <= 1.0, shadowCoord.y >= 0.0, shadowCoord.y <= 1.0 );\\n\t\tbool inFrustum = all( inFrustumVec );\\n\\n\t\t\t\t// don't shadow pixels outside of light frustum\\n\t\t\t\t// use just first frustum (for cascades)\\n\t\t\t\t// don't shadow pixels behind far plane of light frustum\\n\\n\t\t#ifdef SHADOWMAP_CASCADE\\n\\n\t\t\tinFrustumCount += int( inFrustum );\\n\t\t\tbvec3 frustumTestVec = bvec3( inFrustum, inFrustumCount == 1, shadowCoord.z <= 1.0 );\\n\\n\t\t#else\\n\\n\t\t\tbvec2 frustumTestVec = bvec2( inFrustum, shadowCoord.z <= 1.0 );\\n\\n\t\t#endif\\n\\n\t\tbool frustumTest = all( frustumTestVec );\\n\\n\t\tif ( frustumTest ) {\\n\\n\t\t\tshadowCoord.z += shadowBias[ i ];\\n\\n\t\t\t#if defined( SHADOWMAP_TYPE_PCF )\\n\\n\t\t\t\t\t\t// Percentage-close filtering\\n\t\t\t\t\t\t// (9 pixel kernel)\\n\t\t\t\t\t\t// http://fabiensanglard.net/shadowmappingPCF/\\n\\n\t\t\t\tfloat shadow = 0.0;\\n\\n\t\t/*\\n\t\t\t\t\t\t// nested loops breaks shader compiler / validator on some ATI cards when using OpenGL\\n\t\t\t\t\t\t// must enroll loop manually\\n\\n\t\t\t\tfor ( float y = -1.25; y <= 1.25; y += 1.25 )\\n\t\t\t\t\tfor ( float x = -1.25; x <= 1.25; x += 1.25 ) {\\n\\n\t\t\t\t\t\tvec4 rgbaDepth = texture2D( shadowMap[ i ], vec2( x * xPixelOffset, y * yPixelOffset ) + shadowCoord.xy );\\n\\n\t\t\t\t\t\t\t\t// doesn't seem to produce any noticeable visual difference compared to simple texture2D lookup\\n\t\t\t\t\t\t\t\t//vec4 rgbaDepth = texture2DProj( shadowMap[ i ], vec4( vShadowCoord[ i ].w * ( vec2( x * xPixelOffset, y * yPixelOffset ) + shadowCoord.xy ), 0.05, vShadowCoord[ i ].w ) );\\n\\n\t\t\t\t\t\tfloat fDepth = unpackDepth( rgbaDepth );\\n\\n\t\t\t\t\t\tif ( fDepth < shadowCoord.z )\\n\t\t\t\t\t\t\tshadow += 1.0;\\n\\n\t\t\t\t}\\n\\n\t\t\t\tshadow /= 9.0;\\n\\n\t\t*/\\n\\n\t\t\t\tconst float shadowDelta = 1.0 / 9.0;\\n\\n\t\t\t\tfloat xPixelOffset = 1.0 / shadowMapSize[ i ].x;\\n\t\t\t\tfloat yPixelOffset = 1.0 / shadowMapSize[ i ].y;\\n\\n\t\t\t\tfloat dx0 = -1.25 * xPixelOffset;\\n\t\t\t\tfloat dy0 = -1.25 * yPixelOffset;\\n\t\t\t\tfloat dx1 = 1.25 * xPixelOffset;\\n\t\t\t\tfloat dy1 = 1.25 * yPixelOffset;\\n\\n\t\t\t\tfDepth = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( dx0, dy0 ) ) );\\n\t\t\t\tif ( fDepth < shadowCoord.z ) shadow += shadowDelta;\\n\\n\t\t\t\tfDepth = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( 0.0, dy0 ) ) );\\n\t\t\t\tif ( fDepth < shadowCoord.z ) shadow += shadowDelta;\\n\\n\t\t\t\tfDepth = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( dx1, dy0 ) ) );\\n\t\t\t\tif ( fDepth < shadowCoord.z ) shadow += shadowDelta;\\n\\n\t\t\t\tfDepth = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( dx0, 0.0 ) ) );\\n\t\t\t\tif ( fDepth < shadowCoord.z ) shadow += shadowDelta;\\n\\n\t\t\t\tfDepth = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy ) );\\n\t\t\t\tif ( fDepth < shadowCoord.z ) shadow += shadowDelta;\\n\\n\t\t\t\tfDepth = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( dx1, 0.0 ) ) );\\n\t\t\t\tif ( fDepth < shadowCoord.z ) shadow += shadowDelta;\\n\\n\t\t\t\tfDepth = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( dx0, dy1 ) ) );\\n\t\t\t\tif ( fDepth < shadowCoord.z ) shadow += shadowDelta;\\n\\n\t\t\t\tfDepth = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( 0.0, dy1 ) ) );\\n\t\t\t\tif ( fDepth < shadowCoord.z ) shadow += shadowDelta;\\n\\n\t\t\t\tfDepth = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( dx1, dy1 ) ) );\\n\t\t\t\tif ( fDepth < shadowCoord.z ) shadow += shadowDelta;\\n\\n\t\t\t\tshadowColor = shadowColor * vec3( ( 1.0 - shadowDarkness[ i ] * shadow ) );\\n\\n\t\t\t#elif defined( SHADOWMAP_TYPE_PCF_SOFT )\\n\\n\t\t\t\t\t\t// Percentage-close filtering\\n\t\t\t\t\t\t// (9 pixel kernel)\\n\t\t\t\t\t\t// http://fabiensanglard.net/shadowmappingPCF/\\n\\n\t\t\t\tfloat shadow = 0.0;\\n\\n\t\t\t\tfloat xPixelOffset = 1.0 / shadowMapSize[ i ].x;\\n\t\t\t\tfloat yPixelOffset = 1.0 / shadowMapSize[ i ].y;\\n\\n\t\t\t\tfloat dx0 = -1.0 * xPixelOffset;\\n\t\t\t\tfloat dy0 = -1.0 * yPixelOffset;\\n\t\t\t\tfloat dx1 = 1.0 * xPixelOffset;\\n\t\t\t\tfloat dy1 = 1.0 * yPixelOffset;\\n\\n\t\t\t\tmat3 shadowKernel;\\n\t\t\t\tmat3 depthKernel;\\n\\n\t\t\t\tdepthKernel[0][0] = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( dx0, dy0 ) ) );\\n\t\t\t\tdepthKernel[0][1] = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( dx0, 0.0 ) ) );\\n\t\t\t\tdepthKernel[0][2] = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( dx0, dy1 ) ) );\\n\t\t\t\tdepthKernel[1][0] = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( 0.0, dy0 ) ) );\\n\t\t\t\tdepthKernel[1][1] = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy ) );\\n\t\t\t\tdepthKernel[1][2] = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( 0.0, dy1 ) ) );\\n\t\t\t\tdepthKernel[2][0] = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( dx1, dy0 ) ) );\\n\t\t\t\tdepthKernel[2][1] = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( dx1, 0.0 ) ) );\\n\t\t\t\tdepthKernel[2][2] = unpackDepth( texture2D( shadowMap[ i ], shadowCoord.xy + vec2( dx1, dy1 ) ) );\\n\\n\t\t\t\tvec3 shadowZ = vec3( shadowCoord.z );\\n\t\t\t\tshadowKernel[0] = vec3(lessThan(depthKernel[0], shadowZ ));\\n\t\t\t\tshadowKernel[0] *= vec3(0.25);\\n\\n\t\t\t\tshadowKernel[1] = vec3(lessThan(depthKernel[1], shadowZ ));\\n\t\t\t\tshadowKernel[1] *= vec3(0.25);\\n\\n\t\t\t\tshadowKernel[2] = vec3(lessThan(depthKernel[2], shadowZ ));\\n\t\t\t\tshadowKernel[2] *= vec3(0.25);\\n\\n\t\t\t\tvec2 fractionalCoord = 1.0 - fract( shadowCoord.xy * shadowMapSize[i].xy );\\n\\n\t\t\t\tshadowKernel[0] = mix( shadowKernel[1], shadowKernel[0], fractionalCoord.x );\\n\t\t\t\tshadowKernel[1] = mix( shadowKernel[2], shadowKernel[1], fractionalCoord.x );\\n\\n\t\t\t\tvec4 shadowValues;\\n\t\t\t\tshadowValues.x = mix( shadowKernel[0][1], shadowKernel[0][0], fractionalCoord.y );\\n\t\t\t\tshadowValues.y = mix( shadowKernel[0][2], shadowKernel[0][1], fractionalCoord.y );\\n\t\t\t\tshadowValues.z = mix( shadowKernel[1][1], shadowKernel[1][0], fractionalCoord.y );\\n\t\t\t\tshadowValues.w = mix( shadowKernel[1][2], shadowKernel[1][1], fractionalCoord.y );\\n\\n\t\t\t\tshadow = dot( shadowValues, vec4( 1.0 ) );\\n\\n\t\t\t\tshadowColor = shadowColor * vec3( ( 1.0 - shadowDarkness[ i ] * shadow ) );\\n\\n\t\t\t#else\\n\\n\t\t\t\tvec4 rgbaDepth = texture2D( shadowMap[ i ], shadowCoord.xy );\\n\t\t\t\tfloat fDepth = unpackDepth( rgbaDepth );\\n\\n\t\t\t\tif ( fDepth < shadowCoord.z )\\n\\n\t\t// spot with multiple shadows is darker\\n\\n\t\t\t\t\tshadowColor = shadowColor * vec3( 1.0 - shadowDarkness[ i ] );\\n\\n\t\t// spot with multiple shadows has the same color as single shadow spot\\n\\n\t\t// \t\t\t\t\tshadowColor = min( shadowColor, vec3( shadowDarkness[ i ] ) );\\n\\n\t\t\t#endif\\n\\n\t\t}\\n\\n\\n\t\t#ifdef SHADOWMAP_DEBUG\\n\\n\t\t\t#ifdef SHADOWMAP_CASCADE\\n\\n\t\t\t\tif ( inFrustum && inFrustumCount == 1 ) outgoingLight *= frustumColors[ i ];\\n\\n\t\t\t#else\\n\\n\t\t\t\tif ( inFrustum ) outgoingLight *= frustumColors[ i ];\\n\\n\t\t\t#endif\\n\\n\t\t#endif\\n\\n\t}\\n\\n\t// NOTE: I am unsure if this is correct in linear space.  -bhouston, Dec 29, 2014\\n\tshadowColor = inputToLinear( shadowColor );\\n\\n\toutgoingLight = outgoingLight * shadowColor;\\n\\n#endif\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/worldpos_vertex.glsl\n\nTHREE.ShaderChunk['worldpos_vertex'] = \"#if defined( USE_ENVMAP ) || defined( PHONG ) || defined( LAMBERT ) || defined ( USE_SHADOWMAP )\\n\\n\t#ifdef USE_SKINNING\\n\\n\t\tvec4 worldPosition = modelMatrix * skinned;\\n\\n\t#elif defined( USE_MORPHTARGETS )\\n\\n\t\tvec4 worldPosition = modelMatrix * vec4( morphed, 1.0 );\\n\\n\t#else\\n\\n\t\tvec4 worldPosition = modelMatrix * vec4( position, 1.0 );\\n\\n\t#endif\\n\\n#endif\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/shadowmap_pars_fragment.glsl\n\nTHREE.ShaderChunk['shadowmap_pars_fragment'] = \"#ifdef USE_SHADOWMAP\\n\\n\tuniform sampler2D shadowMap[ MAX_SHADOWS ];\\n\tuniform vec2 shadowMapSize[ MAX_SHADOWS ];\\n\\n\tuniform float shadowDarkness[ MAX_SHADOWS ];\\n\tuniform float shadowBias[ MAX_SHADOWS ];\\n\\n\tvarying vec4 vShadowCoord[ MAX_SHADOWS ];\\n\\n\tfloat unpackDepth( const in vec4 rgba_depth ) {\\n\\n\t\tconst vec4 bit_shift = vec4( 1.0 / ( 256.0 * 256.0 * 256.0 ), 1.0 / ( 256.0 * 256.0 ), 1.0 / 256.0, 1.0 );\\n\t\tfloat depth = dot( rgba_depth, bit_shift );\\n\t\treturn depth;\\n\\n\t}\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/skinning_pars_vertex.glsl\n\nTHREE.ShaderChunk['skinning_pars_vertex'] = \"#ifdef USE_SKINNING\\n\\n\tuniform mat4 bindMatrix;\\n\tuniform mat4 bindMatrixInverse;\\n\\n\t#ifdef BONE_TEXTURE\\n\\n\t\tuniform sampler2D boneTexture;\\n\t\tuniform int boneTextureWidth;\\n\t\tuniform int boneTextureHeight;\\n\\n\t\tmat4 getBoneMatrix( const in float i ) {\\n\\n\t\t\tfloat j = i * 4.0;\\n\t\t\tfloat x = mod( j, float( boneTextureWidth ) );\\n\t\t\tfloat y = floor( j / float( boneTextureWidth ) );\\n\\n\t\t\tfloat dx = 1.0 / float( boneTextureWidth );\\n\t\t\tfloat dy = 1.0 / float( boneTextureHeight );\\n\\n\t\t\ty = dy * ( y + 0.5 );\\n\\n\t\t\tvec4 v1 = texture2D( boneTexture, vec2( dx * ( x + 0.5 ), y ) );\\n\t\t\tvec4 v2 = texture2D( boneTexture, vec2( dx * ( x + 1.5 ), y ) );\\n\t\t\tvec4 v3 = texture2D( boneTexture, vec2( dx * ( x + 2.5 ), y ) );\\n\t\t\tvec4 v4 = texture2D( boneTexture, vec2( dx * ( x + 3.5 ), y ) );\\n\\n\t\t\tmat4 bone = mat4( v1, v2, v3, v4 );\\n\\n\t\t\treturn bone;\\n\\n\t\t}\\n\\n\t#else\\n\\n\t\tuniform mat4 boneGlobalMatrices[ MAX_BONES ];\\n\\n\t\tmat4 getBoneMatrix( const in float i ) {\\n\\n\t\t\tmat4 bone = boneGlobalMatrices[ int(i) ];\\n\t\t\treturn bone;\\n\\n\t\t}\\n\\n\t#endif\\n\\n#endif\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/logdepthbuf_pars_fragment.glsl\n\nTHREE.ShaderChunk['logdepthbuf_pars_fragment'] = \"#ifdef USE_LOGDEPTHBUF\\n\\n\tuniform float logDepthBufFC;\\n\\n\t#ifdef USE_LOGDEPTHBUF_EXT\\n\\n\t\t#extension GL_EXT_frag_depth : enable\\n\t\tvarying float vFragDepth;\\n\\n\t#endif\\n\\n#endif\";\n\n// File:src/renderers/shaders/ShaderChunk/alphamap_fragment.glsl\n\nTHREE.ShaderChunk['alphamap_fragment'] = \"#ifdef USE_ALPHAMAP\\n\\n\tdiffuseColor.a *= texture2D( alphaMap, vUv ).g;\\n\\n#endif\\n\";\n\n// File:src/renderers/shaders/ShaderChunk/alphamap_pars_fragment.glsl\n\nTHREE.ShaderChunk['alphamap_pars_fragment'] = \"#ifdef USE_ALPHAMAP\\n\\n\tuniform sampler2D alphaMap;\\n\\n#endif\\n\";\n\n// File:src/renderers/shaders/UniformsUtils.js\n\n/**\n * Uniform Utilities\n */\n\nTHREE.UniformsUtils = {\n\n  merge: function merge(uniforms) {\n\n    var merged = {};\n\n    for (var u = 0; u < uniforms.length; u++) {\n\n      var tmp = this.clone(uniforms[u]);\n\n      for (var p in tmp) {\n\n        merged[p] = tmp[p];\n\n      }\n\n    }\n\n    return merged;\n\n  },\n\n  clone: function clone(uniforms_src) {\n\n    var uniforms_dst = {};\n\n    for (var u in uniforms_src) {\n\n      uniforms_dst[u] = {};\n\n      for (var p in uniforms_src[u]) {\n\n        var parameter_src = uniforms_src[u][p];\n\n        if (parameter_src instanceof THREE.Color ||\n        parameter_src instanceof THREE.Vector2 ||\n        parameter_src instanceof THREE.Vector3 ||\n        parameter_src instanceof THREE.Vector4 ||\n        parameter_src instanceof THREE.Matrix4 ||\n        parameter_src instanceof THREE.Texture) {\n\n          uniforms_dst[u][p] = parameter_src.clone();\n\n        } else if (parameter_src instanceof Array) {\n\n          uniforms_dst[u][p] = parameter_src.slice();\n\n        } else {\n\n          uniforms_dst[u][p] = parameter_src;\n\n        }\n\n      }\n\n    }\n\n    return uniforms_dst;\n\n  } };\n\n\n\n// File:src/renderers/shaders/UniformsLib.js\n\n/**\n * Uniforms library for shared webgl shaders\n */\n\nTHREE.UniformsLib = {\n\n  common: {\n\n    \"diffuse\": { type: \"c\", value: new THREE.Color(0xeeeeee) },\n    \"opacity\": { type: \"f\", value: 1.0 },\n\n    \"map\": { type: \"t\", value: null },\n    \"offsetRepeat\": { type: \"v4\", value: new THREE.Vector4(0, 0, 1, 1) },\n\n    \"lightMap\": { type: \"t\", value: null },\n    \"specularMap\": { type: \"t\", value: null },\n    \"alphaMap\": { type: \"t\", value: null },\n\n    \"envMap\": { type: \"t\", value: null },\n    \"flipEnvMap\": { type: \"f\", value: -1 },\n    \"reflectivity\": { type: \"f\", value: 1.0 },\n    \"refractionRatio\": { type: \"f\", value: 0.98 },\n\n    \"morphTargetInfluences\": { type: \"f\", value: 0 } },\n\n\n\n  bump: {\n\n    \"bumpMap\": { type: \"t\", value: null },\n    \"bumpScale\": { type: \"f\", value: 1 } },\n\n\n\n  normalmap: {\n\n    \"normalMap\": { type: \"t\", value: null },\n    \"normalScale\": { type: \"v2\", value: new THREE.Vector2(1, 1) } },\n\n\n  fog: {\n\n    \"fogDensity\": { type: \"f\", value: 0.00025 },\n    \"fogNear\": { type: \"f\", value: 1 },\n    \"fogFar\": { type: \"f\", value: 2000 },\n    \"fogColor\": { type: \"c\", value: new THREE.Color(0xffffff) } },\n\n\n\n  lights: {\n\n    \"ambientLightColor\": { type: \"fv\", value: [] },\n\n    \"directionalLightDirection\": { type: \"fv\", value: [] },\n    \"directionalLightColor\": { type: \"fv\", value: [] },\n\n    \"hemisphereLightDirection\": { type: \"fv\", value: [] },\n    \"hemisphereLightSkyColor\": { type: \"fv\", value: [] },\n    \"hemisphereLightGroundColor\": { type: \"fv\", value: [] },\n\n    \"pointLightColor\": { type: \"fv\", value: [] },\n    \"pointLightPosition\": { type: \"fv\", value: [] },\n    \"pointLightDistance\": { type: \"fv1\", value: [] },\n    \"pointLightDecay\": { type: \"fv1\", value: [] },\n\n    \"spotLightColor\": { type: \"fv\", value: [] },\n    \"spotLightPosition\": { type: \"fv\", value: [] },\n    \"spotLightDirection\": { type: \"fv\", value: [] },\n    \"spotLightDistance\": { type: \"fv1\", value: [] },\n    \"spotLightAngleCos\": { type: \"fv1\", value: [] },\n    \"spotLightExponent\": { type: \"fv1\", value: [] },\n    \"spotLightDecay\": { type: \"fv1\", value: [] } },\n\n\n\n  particle: {\n\n    \"psColor\": { type: \"c\", value: new THREE.Color(0xeeeeee) },\n    \"opacity\": { type: \"f\", value: 1.0 },\n    \"size\": { type: \"f\", value: 1.0 },\n    \"scale\": { type: \"f\", value: 1.0 },\n    \"map\": { type: \"t\", value: null },\n    \"offsetRepeat\": { type: \"v4\", value: new THREE.Vector4(0, 0, 1, 1) },\n\n    \"fogDensity\": { type: \"f\", value: 0.00025 },\n    \"fogNear\": { type: \"f\", value: 1 },\n    \"fogFar\": { type: \"f\", value: 2000 },\n    \"fogColor\": { type: \"c\", value: new THREE.Color(0xffffff) } },\n\n\n\n  shadowmap: {\n\n    \"shadowMap\": { type: \"tv\", value: [] },\n    \"shadowMapSize\": { type: \"v2v\", value: [] },\n\n    \"shadowBias\": { type: \"fv1\", value: [] },\n    \"shadowDarkness\": { type: \"fv1\", value: [] },\n\n    \"shadowMatrix\": { type: \"m4v\", value: [] } } };\n\n\n\n\n\n// File:src/renderers/shaders/ShaderLib.js\n\n/**\n * Webgl Shader Library for three.js\n *\n * @author alteredq / http://alteredqualia.com/\n * @author mrdoob / http://mrdoob.com/\n * @author mikael emtinger / http://gomo.se/\n */\n\n\nTHREE.ShaderLib = {\n\n  'basic': {\n\n    uniforms: THREE.UniformsUtils.merge([\n\n    THREE.UniformsLib[\"common\"],\n    THREE.UniformsLib[\"fog\"],\n    THREE.UniformsLib[\"shadowmap\"]]),\n\n\n\n    vertexShader: [\n\n    THREE.ShaderChunk[\"common\"],\n    THREE.ShaderChunk[\"map_pars_vertex\"],\n    THREE.ShaderChunk[\"lightmap_pars_vertex\"],\n    THREE.ShaderChunk[\"envmap_pars_vertex\"],\n    THREE.ShaderChunk[\"color_pars_vertex\"],\n    THREE.ShaderChunk[\"morphtarget_pars_vertex\"],\n    THREE.ShaderChunk[\"skinning_pars_vertex\"],\n    THREE.ShaderChunk[\"shadowmap_pars_vertex\"],\n    THREE.ShaderChunk[\"logdepthbuf_pars_vertex\"],\n\n    \"void main() {\",\n\n    THREE.ShaderChunk[\"map_vertex\"],\n    THREE.ShaderChunk[\"lightmap_vertex\"],\n    THREE.ShaderChunk[\"color_vertex\"],\n    THREE.ShaderChunk[\"skinbase_vertex\"],\n\n    \"\t#ifdef USE_ENVMAP\",\n\n    THREE.ShaderChunk[\"morphnormal_vertex\"],\n    THREE.ShaderChunk[\"skinnormal_vertex\"],\n    THREE.ShaderChunk[\"defaultnormal_vertex\"],\n\n    \"\t#endif\",\n\n    THREE.ShaderChunk[\"morphtarget_vertex\"],\n    THREE.ShaderChunk[\"skinning_vertex\"],\n    THREE.ShaderChunk[\"default_vertex\"],\n    THREE.ShaderChunk[\"logdepthbuf_vertex\"],\n\n    THREE.ShaderChunk[\"worldpos_vertex\"],\n    THREE.ShaderChunk[\"envmap_vertex\"],\n    THREE.ShaderChunk[\"shadowmap_vertex\"],\n\n    \"}\"].\n\n    join(\"\\n\"),\n\n    fragmentShader: [\n\n    \"uniform vec3 diffuse;\",\n    \"uniform float opacity;\",\n\n    THREE.ShaderChunk[\"common\"],\n    THREE.ShaderChunk[\"color_pars_fragment\"],\n    THREE.ShaderChunk[\"map_pars_fragment\"],\n    THREE.ShaderChunk[\"alphamap_pars_fragment\"],\n    THREE.ShaderChunk[\"lightmap_pars_fragment\"],\n    THREE.ShaderChunk[\"envmap_pars_fragment\"],\n    THREE.ShaderChunk[\"fog_pars_fragment\"],\n    THREE.ShaderChunk[\"shadowmap_pars_fragment\"],\n    THREE.ShaderChunk[\"specularmap_pars_fragment\"],\n    THREE.ShaderChunk[\"logdepthbuf_pars_fragment\"],\n\n    \"void main() {\",\n\n    \"\tvec3 outgoingLight = vec3( 0.0 );\", // outgoing light does not have an alpha, the surface does\n    \"\tvec4 diffuseColor = vec4( diffuse, opacity );\",\n\n    THREE.ShaderChunk[\"logdepthbuf_fragment\"],\n    THREE.ShaderChunk[\"map_fragment\"],\n    THREE.ShaderChunk[\"color_fragment\"],\n    THREE.ShaderChunk[\"alphamap_fragment\"],\n    THREE.ShaderChunk[\"alphatest_fragment\"],\n    THREE.ShaderChunk[\"specularmap_fragment\"],\n\n    \"\toutgoingLight = diffuseColor.rgb;\", // simple shader\n\n    THREE.ShaderChunk[\"lightmap_fragment\"], // TODO: Light map on an otherwise unlit surface doesn't make sense.\n    THREE.ShaderChunk[\"envmap_fragment\"],\n    THREE.ShaderChunk[\"shadowmap_fragment\"], // TODO: Shadows on an otherwise unlit surface doesn't make sense.\n\n    THREE.ShaderChunk[\"linear_to_gamma_fragment\"],\n\n    THREE.ShaderChunk[\"fog_fragment\"],\n\n    \"\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\", // TODO, this should be pre-multiplied to allow for bright highlights on very transparent objects\n\n    \"}\"].\n\n    join(\"\\n\") },\n\n\n\n  'lambert': {\n\n    uniforms: THREE.UniformsUtils.merge([\n\n    THREE.UniformsLib[\"common\"],\n    THREE.UniformsLib[\"fog\"],\n    THREE.UniformsLib[\"lights\"],\n    THREE.UniformsLib[\"shadowmap\"],\n\n    {\n      \"emissive\": { type: \"c\", value: new THREE.Color(0x000000) },\n      \"wrapRGB\": { type: \"v3\", value: new THREE.Vector3(1, 1, 1) } }]),\n\n\n\n\n    vertexShader: [\n\n    \"#define LAMBERT\",\n\n    \"varying vec3 vLightFront;\",\n\n    \"#ifdef DOUBLE_SIDED\",\n\n    \"\tvarying vec3 vLightBack;\",\n\n    \"#endif\",\n\n    THREE.ShaderChunk[\"common\"],\n    THREE.ShaderChunk[\"map_pars_vertex\"],\n    THREE.ShaderChunk[\"lightmap_pars_vertex\"],\n    THREE.ShaderChunk[\"envmap_pars_vertex\"],\n    THREE.ShaderChunk[\"lights_lambert_pars_vertex\"],\n    THREE.ShaderChunk[\"color_pars_vertex\"],\n    THREE.ShaderChunk[\"morphtarget_pars_vertex\"],\n    THREE.ShaderChunk[\"skinning_pars_vertex\"],\n    THREE.ShaderChunk[\"shadowmap_pars_vertex\"],\n    THREE.ShaderChunk[\"logdepthbuf_pars_vertex\"],\n\n    \"void main() {\",\n\n    THREE.ShaderChunk[\"map_vertex\"],\n    THREE.ShaderChunk[\"lightmap_vertex\"],\n    THREE.ShaderChunk[\"color_vertex\"],\n\n    THREE.ShaderChunk[\"morphnormal_vertex\"],\n    THREE.ShaderChunk[\"skinbase_vertex\"],\n    THREE.ShaderChunk[\"skinnormal_vertex\"],\n    THREE.ShaderChunk[\"defaultnormal_vertex\"],\n\n    THREE.ShaderChunk[\"morphtarget_vertex\"],\n    THREE.ShaderChunk[\"skinning_vertex\"],\n    THREE.ShaderChunk[\"default_vertex\"],\n    THREE.ShaderChunk[\"logdepthbuf_vertex\"],\n\n    THREE.ShaderChunk[\"worldpos_vertex\"],\n    THREE.ShaderChunk[\"envmap_vertex\"],\n    THREE.ShaderChunk[\"lights_lambert_vertex\"],\n    THREE.ShaderChunk[\"shadowmap_vertex\"],\n\n    \"}\"].\n\n    join(\"\\n\"),\n\n    fragmentShader: [\n\n    \"uniform vec3 diffuse;\",\n    \"uniform vec3 emissive;\",\n    \"uniform float opacity;\",\n\n    \"varying vec3 vLightFront;\",\n\n    \"#ifdef DOUBLE_SIDED\",\n\n    \"\tvarying vec3 vLightBack;\",\n\n    \"#endif\",\n\n    THREE.ShaderChunk[\"common\"],\n    THREE.ShaderChunk[\"color_pars_fragment\"],\n    THREE.ShaderChunk[\"map_pars_fragment\"],\n    THREE.ShaderChunk[\"alphamap_pars_fragment\"],\n    THREE.ShaderChunk[\"lightmap_pars_fragment\"],\n    THREE.ShaderChunk[\"envmap_pars_fragment\"],\n    THREE.ShaderChunk[\"fog_pars_fragment\"],\n    THREE.ShaderChunk[\"shadowmap_pars_fragment\"],\n    THREE.ShaderChunk[\"specularmap_pars_fragment\"],\n    THREE.ShaderChunk[\"logdepthbuf_pars_fragment\"],\n\n    \"void main() {\",\n\n    \"\tvec3 outgoingLight = vec3( 0.0 );\", // outgoing light does not have an alpha, the surface does\n    \"\tvec4 diffuseColor = vec4( diffuse, opacity );\",\n\n    THREE.ShaderChunk[\"logdepthbuf_fragment\"],\n    THREE.ShaderChunk[\"map_fragment\"],\n    THREE.ShaderChunk[\"color_fragment\"],\n    THREE.ShaderChunk[\"alphamap_fragment\"],\n    THREE.ShaderChunk[\"alphatest_fragment\"],\n    THREE.ShaderChunk[\"specularmap_fragment\"],\n\n    \"\t#ifdef DOUBLE_SIDED\",\n\n    //\"float isFront = float( gl_FrontFacing );\",\n    //\"gl_FragColor.xyz *= isFront * vLightFront + ( 1.0 - isFront ) * vLightBack;\",\n\n    \"\t\tif ( gl_FrontFacing )\",\n    \"\t\t\toutgoingLight += diffuseColor.rgb * vLightFront + emissive;\",\n    \"\t\telse\",\n    \"\t\t\toutgoingLight += diffuseColor.rgb * vLightBack + emissive;\",\n\n    \"\t#else\",\n\n    \"\t\toutgoingLight += diffuseColor.rgb * vLightFront + emissive;\",\n\n    \"\t#endif\",\n\n    THREE.ShaderChunk[\"lightmap_fragment\"],\n    THREE.ShaderChunk[\"envmap_fragment\"],\n    THREE.ShaderChunk[\"shadowmap_fragment\"],\n\n    THREE.ShaderChunk[\"linear_to_gamma_fragment\"],\n\n    THREE.ShaderChunk[\"fog_fragment\"],\n\n    \"\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\", // TODO, this should be pre-multiplied to allow for bright highlights on very transparent objects\n\n    \"}\"].\n\n    join(\"\\n\") },\n\n\n\n  'phong': {\n\n    uniforms: THREE.UniformsUtils.merge([\n\n    THREE.UniformsLib[\"common\"],\n    THREE.UniformsLib[\"bump\"],\n    THREE.UniformsLib[\"normalmap\"],\n    THREE.UniformsLib[\"fog\"],\n    THREE.UniformsLib[\"lights\"],\n    THREE.UniformsLib[\"shadowmap\"],\n\n    {\n      \"emissive\": { type: \"c\", value: new THREE.Color(0x000000) },\n      \"specular\": { type: \"c\", value: new THREE.Color(0x111111) },\n      \"shininess\": { type: \"f\", value: 30 },\n      \"wrapRGB\": { type: \"v3\", value: new THREE.Vector3(1, 1, 1) } }]),\n\n\n\n\n    vertexShader: [\n\n    \"#define PHONG\",\n\n    \"varying vec3 vViewPosition;\",\n\n    \"#ifndef FLAT_SHADED\",\n\n    \"\tvarying vec3 vNormal;\",\n\n    \"#endif\",\n\n    THREE.ShaderChunk[\"common\"],\n    THREE.ShaderChunk[\"map_pars_vertex\"],\n    THREE.ShaderChunk[\"lightmap_pars_vertex\"],\n    THREE.ShaderChunk[\"envmap_pars_vertex\"],\n    THREE.ShaderChunk[\"lights_phong_pars_vertex\"],\n    THREE.ShaderChunk[\"color_pars_vertex\"],\n    THREE.ShaderChunk[\"morphtarget_pars_vertex\"],\n    THREE.ShaderChunk[\"skinning_pars_vertex\"],\n    THREE.ShaderChunk[\"shadowmap_pars_vertex\"],\n    THREE.ShaderChunk[\"logdepthbuf_pars_vertex\"],\n\n    \"void main() {\",\n\n    THREE.ShaderChunk[\"map_vertex\"],\n    THREE.ShaderChunk[\"lightmap_vertex\"],\n    THREE.ShaderChunk[\"color_vertex\"],\n\n    THREE.ShaderChunk[\"morphnormal_vertex\"],\n    THREE.ShaderChunk[\"skinbase_vertex\"],\n    THREE.ShaderChunk[\"skinnormal_vertex\"],\n    THREE.ShaderChunk[\"defaultnormal_vertex\"],\n\n    \"#ifndef FLAT_SHADED\", // Normal computed with derivatives when FLAT_SHADED\n\n    \"\tvNormal = normalize( transformedNormal );\",\n\n    \"#endif\",\n\n    THREE.ShaderChunk[\"morphtarget_vertex\"],\n    THREE.ShaderChunk[\"skinning_vertex\"],\n    THREE.ShaderChunk[\"default_vertex\"],\n    THREE.ShaderChunk[\"logdepthbuf_vertex\"],\n\n    \"\tvViewPosition = -mvPosition.xyz;\",\n\n    THREE.ShaderChunk[\"worldpos_vertex\"],\n    THREE.ShaderChunk[\"envmap_vertex\"],\n    THREE.ShaderChunk[\"lights_phong_vertex\"],\n    THREE.ShaderChunk[\"shadowmap_vertex\"],\n\n    \"}\"].\n\n    join(\"\\n\"),\n\n    fragmentShader: [\n\n    \"#define PHONG\",\n\n    \"uniform vec3 diffuse;\",\n    \"uniform vec3 emissive;\",\n    \"uniform vec3 specular;\",\n    \"uniform float shininess;\",\n    \"uniform float opacity;\",\n\n    THREE.ShaderChunk[\"common\"],\n    THREE.ShaderChunk[\"color_pars_fragment\"],\n    THREE.ShaderChunk[\"map_pars_fragment\"],\n    THREE.ShaderChunk[\"alphamap_pars_fragment\"],\n    THREE.ShaderChunk[\"lightmap_pars_fragment\"],\n    THREE.ShaderChunk[\"envmap_pars_fragment\"],\n    THREE.ShaderChunk[\"fog_pars_fragment\"],\n    THREE.ShaderChunk[\"lights_phong_pars_fragment\"],\n    THREE.ShaderChunk[\"shadowmap_pars_fragment\"],\n    THREE.ShaderChunk[\"bumpmap_pars_fragment\"],\n    THREE.ShaderChunk[\"normalmap_pars_fragment\"],\n    THREE.ShaderChunk[\"specularmap_pars_fragment\"],\n    THREE.ShaderChunk[\"logdepthbuf_pars_fragment\"],\n\n    \"void main() {\",\n\n    \"\tvec3 outgoingLight = vec3( 0.0 );\", // outgoing light does not have an alpha, the surface does\n    \"\tvec4 diffuseColor = vec4( diffuse, opacity );\",\n\n    THREE.ShaderChunk[\"logdepthbuf_fragment\"],\n    THREE.ShaderChunk[\"map_fragment\"],\n    THREE.ShaderChunk[\"color_fragment\"],\n    THREE.ShaderChunk[\"alphamap_fragment\"],\n    THREE.ShaderChunk[\"alphatest_fragment\"],\n    THREE.ShaderChunk[\"specularmap_fragment\"],\n\n    THREE.ShaderChunk[\"lights_phong_fragment\"],\n\n    THREE.ShaderChunk[\"lightmap_fragment\"],\n    THREE.ShaderChunk[\"envmap_fragment\"],\n    THREE.ShaderChunk[\"shadowmap_fragment\"],\n\n    THREE.ShaderChunk[\"linear_to_gamma_fragment\"],\n\n    THREE.ShaderChunk[\"fog_fragment\"],\n\n    \"\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\", // TODO, this should be pre-multiplied to allow for bright highlights on very transparent objects\n\n    \"}\"].\n\n    join(\"\\n\") },\n\n\n\n  'particle_basic': {\n\n    uniforms: THREE.UniformsUtils.merge([\n\n    THREE.UniformsLib[\"particle\"],\n    THREE.UniformsLib[\"shadowmap\"]]),\n\n\n\n    vertexShader: [\n\n    \"uniform float size;\",\n    \"uniform float scale;\",\n\n    THREE.ShaderChunk[\"common\"],\n    THREE.ShaderChunk[\"color_pars_vertex\"],\n    THREE.ShaderChunk[\"shadowmap_pars_vertex\"],\n    THREE.ShaderChunk[\"logdepthbuf_pars_vertex\"],\n\n    \"void main() {\",\n\n    THREE.ShaderChunk[\"color_vertex\"],\n\n    \"\tvec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );\",\n\n    \"\t#ifdef USE_SIZEATTENUATION\",\n    \"\t\tgl_PointSize = size * ( scale / length( mvPosition.xyz ) );\",\n    \"\t#else\",\n    \"\t\tgl_PointSize = size;\",\n    \"\t#endif\",\n\n    \"\tgl_Position = projectionMatrix * mvPosition;\",\n\n    THREE.ShaderChunk[\"logdepthbuf_vertex\"],\n    THREE.ShaderChunk[\"worldpos_vertex\"],\n    THREE.ShaderChunk[\"shadowmap_vertex\"],\n\n    \"}\"].\n\n    join(\"\\n\"),\n\n    fragmentShader: [\n\n    \"uniform vec3 psColor;\",\n    \"uniform float opacity;\",\n\n    THREE.ShaderChunk[\"common\"],\n    THREE.ShaderChunk[\"color_pars_fragment\"],\n    THREE.ShaderChunk[\"map_particle_pars_fragment\"],\n    THREE.ShaderChunk[\"fog_pars_fragment\"],\n    THREE.ShaderChunk[\"shadowmap_pars_fragment\"],\n    THREE.ShaderChunk[\"logdepthbuf_pars_fragment\"],\n\n    \"void main() {\",\n\n    \"\tvec3 outgoingLight = vec3( 0.0 );\", // outgoing light does not have an alpha, the surface does\n    \"\tvec4 diffuseColor = vec4( psColor, opacity );\",\n\n    THREE.ShaderChunk[\"logdepthbuf_fragment\"],\n    THREE.ShaderChunk[\"map_particle_fragment\"],\n    THREE.ShaderChunk[\"color_fragment\"],\n    THREE.ShaderChunk[\"alphatest_fragment\"],\n\n    \"\toutgoingLight = diffuseColor.rgb;\", // simple shader\n\n    THREE.ShaderChunk[\"shadowmap_fragment\"],\n    THREE.ShaderChunk[\"fog_fragment\"],\n\n    \"\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\", // TODO, this should be pre-multiplied to allow for bright highlights on very transparent objects\n\n    \"}\"].\n\n    join(\"\\n\") },\n\n\n\n  'dashed': {\n\n    uniforms: THREE.UniformsUtils.merge([\n\n    THREE.UniformsLib[\"common\"],\n    THREE.UniformsLib[\"fog\"],\n\n    {\n      \"scale\": { type: \"f\", value: 1 },\n      \"dashSize\": { type: \"f\", value: 1 },\n      \"totalSize\": { type: \"f\", value: 2 } }]),\n\n\n\n\n    vertexShader: [\n\n    \"uniform float scale;\",\n    \"attribute float lineDistance;\",\n\n    \"varying float vLineDistance;\",\n\n    THREE.ShaderChunk[\"common\"],\n    THREE.ShaderChunk[\"color_pars_vertex\"],\n    THREE.ShaderChunk[\"logdepthbuf_pars_vertex\"],\n\n    \"void main() {\",\n\n    THREE.ShaderChunk[\"color_vertex\"],\n\n    \"\tvLineDistance = scale * lineDistance;\",\n\n    \"\tvec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );\",\n    \"\tgl_Position = projectionMatrix * mvPosition;\",\n\n    THREE.ShaderChunk[\"logdepthbuf_vertex\"],\n\n    \"}\"].\n\n    join(\"\\n\"),\n\n    fragmentShader: [\n\n    \"uniform vec3 diffuse;\",\n    \"uniform float opacity;\",\n\n    \"uniform float dashSize;\",\n    \"uniform float totalSize;\",\n\n    \"varying float vLineDistance;\",\n\n    THREE.ShaderChunk[\"common\"],\n    THREE.ShaderChunk[\"color_pars_fragment\"],\n    THREE.ShaderChunk[\"fog_pars_fragment\"],\n    THREE.ShaderChunk[\"logdepthbuf_pars_fragment\"],\n\n    \"void main() {\",\n\n    \"\tif ( mod( vLineDistance, totalSize ) > dashSize ) {\",\n\n    \"\t\tdiscard;\",\n\n    \"\t}\",\n\n    \"\tvec3 outgoingLight = vec3( 0.0 );\", // outgoing light does not have an alpha, the surface does\n    \"\tvec4 diffuseColor = vec4( diffuse, opacity );\",\n\n    THREE.ShaderChunk[\"logdepthbuf_fragment\"],\n    THREE.ShaderChunk[\"color_fragment\"],\n\n    \"\toutgoingLight = diffuseColor.rgb;\", // simple shader\n\n    THREE.ShaderChunk[\"fog_fragment\"],\n\n    \"\tgl_FragColor = vec4( outgoingLight, diffuseColor.a );\", // TODO, this should be pre-multiplied to allow for bright highlights on very transparent objects\n\n    \"}\"].\n\n    join(\"\\n\") },\n\n\n\n  'depth': {\n\n    uniforms: {\n\n      \"mNear\": { type: \"f\", value: 1.0 },\n      \"mFar\": { type: \"f\", value: 2000.0 },\n      \"opacity\": { type: \"f\", value: 1.0 } },\n\n\n\n    vertexShader: [\n\n    THREE.ShaderChunk[\"common\"],\n    THREE.ShaderChunk[\"morphtarget_pars_vertex\"],\n    THREE.ShaderChunk[\"logdepthbuf_pars_vertex\"],\n\n    \"void main() {\",\n\n    THREE.ShaderChunk[\"morphtarget_vertex\"],\n    THREE.ShaderChunk[\"default_vertex\"],\n    THREE.ShaderChunk[\"logdepthbuf_vertex\"],\n\n    \"}\"].\n\n    join(\"\\n\"),\n\n    fragmentShader: [\n\n    \"uniform float mNear;\",\n    \"uniform float mFar;\",\n    \"uniform float opacity;\",\n\n    THREE.ShaderChunk[\"common\"],\n    THREE.ShaderChunk[\"logdepthbuf_pars_fragment\"],\n\n    \"void main() {\",\n\n    THREE.ShaderChunk[\"logdepthbuf_fragment\"],\n\n    \"\t#ifdef USE_LOGDEPTHBUF_EXT\",\n\n    \"\t\tfloat depth = gl_FragDepthEXT / gl_FragCoord.w;\",\n\n    \"\t#else\",\n\n    \"\t\tfloat depth = gl_FragCoord.z / gl_FragCoord.w;\",\n\n    \"\t#endif\",\n\n    \"\tfloat color = 1.0 - smoothstep( mNear, mFar, depth );\",\n    \"\tgl_FragColor = vec4( vec3( color ), opacity );\", // TODO, this should be pre-multiplied to allow for bright highlights on very transparent objects\n\n    \"}\"].\n\n    join(\"\\n\") },\n\n\n\n  'normal': {\n\n    uniforms: {\n\n      \"opacity\": { type: \"f\", value: 1.0 } },\n\n\n\n    vertexShader: [\n\n    \"varying vec3 vNormal;\",\n\n    THREE.ShaderChunk[\"common\"],\n    THREE.ShaderChunk[\"morphtarget_pars_vertex\"],\n    THREE.ShaderChunk[\"logdepthbuf_pars_vertex\"],\n\n    \"void main() {\",\n\n    \"\tvNormal = normalize( normalMatrix * normal );\",\n\n    THREE.ShaderChunk[\"morphtarget_vertex\"],\n    THREE.ShaderChunk[\"default_vertex\"],\n    THREE.ShaderChunk[\"logdepthbuf_vertex\"],\n\n    \"}\"].\n\n    join(\"\\n\"),\n\n    fragmentShader: [\n\n    \"uniform float opacity;\",\n    \"varying vec3 vNormal;\",\n\n    THREE.ShaderChunk[\"common\"],\n    THREE.ShaderChunk[\"logdepthbuf_pars_fragment\"],\n\n    \"void main() {\",\n\n    \"\tgl_FragColor = vec4( 0.5 * normalize( vNormal ) + 0.5, opacity );\",\n\n    THREE.ShaderChunk[\"logdepthbuf_fragment\"],\n\n    \"}\"].\n\n    join(\"\\n\") },\n\n\n\n  /* -------------------------------------------------------------------------\n                  //\tCube map shader\n                   ------------------------------------------------------------------------- */\n\n  'cube': {\n\n    uniforms: { \"tCube\": { type: \"t\", value: null },\n      \"tFlip\": { type: \"f\", value: -1 } },\n\n    vertexShader: [\n\n    \"varying vec3 vWorldPosition;\",\n\n    THREE.ShaderChunk[\"common\"],\n    THREE.ShaderChunk[\"logdepthbuf_pars_vertex\"],\n\n    \"void main() {\",\n\n    \"\tvWorldPosition = transformDirection( position, modelMatrix );\",\n\n    \"\tgl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\",\n\n    THREE.ShaderChunk[\"logdepthbuf_vertex\"],\n\n    \"}\"].\n\n    join(\"\\n\"),\n\n    fragmentShader: [\n\n    \"uniform samplerCube tCube;\",\n    \"uniform float tFlip;\",\n\n    \"varying vec3 vWorldPosition;\",\n\n    THREE.ShaderChunk[\"common\"],\n    THREE.ShaderChunk[\"logdepthbuf_pars_fragment\"],\n\n    \"void main() {\",\n\n    \"\tgl_FragColor = textureCube( tCube, vec3( tFlip * vWorldPosition.x, vWorldPosition.yz ) );\",\n\n    THREE.ShaderChunk[\"logdepthbuf_fragment\"],\n\n    \"}\"].\n\n    join(\"\\n\") },\n\n\n\n  /* -------------------------------------------------------------------------\n                  //\tCube map shader\n                   ------------------------------------------------------------------------- */\n\n  'equirect': {\n\n    uniforms: { \"tEquirect\": { type: \"t\", value: null },\n      \"tFlip\": { type: \"f\", value: -1 } },\n\n    vertexShader: [\n\n    \"varying vec3 vWorldPosition;\",\n\n    THREE.ShaderChunk[\"common\"],\n    THREE.ShaderChunk[\"logdepthbuf_pars_vertex\"],\n\n    \"void main() {\",\n\n    \"\tvWorldPosition = transformDirection( position, modelMatrix );\",\n\n    \"\tgl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\",\n\n    THREE.ShaderChunk[\"logdepthbuf_vertex\"],\n\n    \"}\"].\n\n    join(\"\\n\"),\n\n    fragmentShader: [\n\n    \"uniform sampler2D tEquirect;\",\n    \"uniform float tFlip;\",\n\n    \"varying vec3 vWorldPosition;\",\n\n    THREE.ShaderChunk[\"common\"],\n    THREE.ShaderChunk[\"logdepthbuf_pars_fragment\"],\n\n    \"void main() {\",\n\n    // \"\tgl_FragColor = textureCube( tCube, vec3( tFlip * vWorldPosition.x, vWorldPosition.yz ) );\",\n    \"vec3 direction = normalize( vWorldPosition );\",\n    \"vec2 sampleUV;\",\n    \"sampleUV.y = saturate( tFlip * direction.y * -0.5 + 0.5 );\",\n    \"sampleUV.x = atan( direction.z, direction.x ) * RECIPROCAL_PI2 + 0.5;\",\n    \"gl_FragColor = texture2D( tEquirect, sampleUV );\",\n\n    THREE.ShaderChunk[\"logdepthbuf_fragment\"],\n\n    \"}\"].\n\n    join(\"\\n\") },\n\n\n\n  /* Depth encoding into RGBA texture\n                   *\n                   * based on SpiderGL shadow map example\n                   * http://spidergl.org/example.php?id=6\n                   *\n                   * originally from\n                   * http://www.gamedev.net/topic/442138-packing-a-float-into-a-a8r8g8b8-texture-shader/page__whichpage__1%25EF%25BF%25BD\n                   *\n                   * see also\n                   * http://aras-p.info/blog/2009/07/30/encoding-floats-to-rgba-the-final/\n                   */\n\n  'depthRGBA': {\n\n    uniforms: {},\n\n    vertexShader: [\n\n    THREE.ShaderChunk[\"common\"],\n    THREE.ShaderChunk[\"morphtarget_pars_vertex\"],\n    THREE.ShaderChunk[\"skinning_pars_vertex\"],\n    THREE.ShaderChunk[\"logdepthbuf_pars_vertex\"],\n\n    \"void main() {\",\n\n    THREE.ShaderChunk[\"skinbase_vertex\"],\n    THREE.ShaderChunk[\"morphtarget_vertex\"],\n    THREE.ShaderChunk[\"skinning_vertex\"],\n    THREE.ShaderChunk[\"default_vertex\"],\n    THREE.ShaderChunk[\"logdepthbuf_vertex\"],\n\n    \"}\"].\n\n    join(\"\\n\"),\n\n    fragmentShader: [\n\n    THREE.ShaderChunk[\"common\"],\n    THREE.ShaderChunk[\"logdepthbuf_pars_fragment\"],\n\n    \"vec4 pack_depth( const in float depth ) {\",\n\n    \"\tconst vec4 bit_shift = vec4( 256.0 * 256.0 * 256.0, 256.0 * 256.0, 256.0, 1.0 );\",\n    \"\tconst vec4 bit_mask = vec4( 0.0, 1.0 / 256.0, 1.0 / 256.0, 1.0 / 256.0 );\",\n    \"\tvec4 res = mod( depth * bit_shift * vec4( 255 ), vec4( 256 ) ) / vec4( 255 );\", // \"\tvec4 res = fract( depth * bit_shift );\",\n    \"\tres -= res.xxyz * bit_mask;\",\n    \"\treturn res;\",\n\n    \"}\",\n\n    \"void main() {\",\n\n    THREE.ShaderChunk[\"logdepthbuf_fragment\"],\n\n    \"\t#ifdef USE_LOGDEPTHBUF_EXT\",\n\n    \"\t\tgl_FragData[ 0 ] = pack_depth( gl_FragDepthEXT );\",\n\n    \"\t#else\",\n\n    \"\t\tgl_FragData[ 0 ] = pack_depth( gl_FragCoord.z );\",\n\n    \"\t#endif\",\n\n    //\"gl_FragData[ 0 ] = pack_depth( gl_FragCoord.z / gl_FragCoord.w );\",\n    //\"float z = ( ( gl_FragCoord.z / gl_FragCoord.w ) - 3.0 ) / ( 4000.0 - 3.0 );\",\n    //\"gl_FragData[ 0 ] = pack_depth( z );\",\n    //\"gl_FragData[ 0 ] = vec4( z, z, z, 1.0 );\",\n\n    \"}\"].\n\n    join(\"\\n\") } };\n\n\n\n\n\n// File:src/renderers/WebGLRenderer.js\n\n/**\n * @author supereggbert / http://www.paulbrunt.co.uk/\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n * @author szimek / https://github.com/szimek/\n */\n\nTHREE.WebGLRenderer = function (parameters) {\n\n  console.log('THREE.WebGLRenderer', THREE.REVISION);\n\n  parameters = parameters || {};\n\n  var _canvas = parameters.canvas !== undefined ? parameters.canvas : document.createElement('canvas'),\n  _context = parameters.context !== undefined ? parameters.context : null,\n\n  pixelRatio = 1,\n\n  _precision = parameters.precision !== undefined ? parameters.precision : 'highp',\n\n  _alpha = parameters.alpha !== undefined ? parameters.alpha : false,\n  _depth = parameters.depth !== undefined ? parameters.depth : true,\n  _stencil = parameters.stencil !== undefined ? parameters.stencil : true,\n  _antialias = parameters.antialias !== undefined ? parameters.antialias : false,\n  _premultipliedAlpha = parameters.premultipliedAlpha !== undefined ? parameters.premultipliedAlpha : true,\n  _preserveDrawingBuffer = parameters.preserveDrawingBuffer !== undefined ? parameters.preserveDrawingBuffer : false,\n  _logarithmicDepthBuffer = parameters.logarithmicDepthBuffer !== undefined ? parameters.logarithmicDepthBuffer : false,\n\n  _clearColor = new THREE.Color(0x000000),\n  _clearAlpha = 0;\n\n  var lights = [];\n\n  var _webglObjects = {};\n  var _webglObjectsImmediate = [];\n\n  var opaqueObjects = [];\n  var transparentObjects = [];\n\n  var sprites = [];\n  var lensFlares = [];\n\n  // public properties\n\n  this.domElement = _canvas;\n  this.context = null;\n\n  // clearing\n\n  this.autoClear = true;\n  this.autoClearColor = true;\n  this.autoClearDepth = true;\n  this.autoClearStencil = true;\n\n  // scene graph\n\n  this.sortObjects = true;\n\n  // physically based shading\n\n  this.gammaFactor = 2.0; // for backwards compatibility\n  this.gammaInput = false;\n  this.gammaOutput = false;\n\n  // shadow map\n\n  this.shadowMapEnabled = false;\n  this.shadowMapType = THREE.PCFShadowMap;\n  this.shadowMapCullFace = THREE.CullFaceFront;\n  this.shadowMapDebug = false;\n  this.shadowMapCascade = false;\n\n  // morphs\n\n  this.maxMorphTargets = 8;\n  this.maxMorphNormals = 4;\n\n  // flags\n\n  this.autoScaleCubemaps = true;\n\n  // info\n\n  this.info = {\n\n    memory: {\n\n      programs: 0,\n      geometries: 0,\n      textures: 0 },\n\n\n\n    render: {\n\n      calls: 0,\n      vertices: 0,\n      faces: 0,\n      points: 0 } };\n\n\n\n\n\n  // internal properties\n\n  var _this = this,\n\n  _programs = [],\n\n  // internal state cache\n\n  _currentProgram = null,\n  _currentFramebuffer = null,\n  _currentMaterialId = -1,\n  _currentGeometryProgram = '',\n  _currentCamera = null,\n\n  _usedTextureUnits = 0,\n\n  _viewportX = 0,\n  _viewportY = 0,\n  _viewportWidth = _canvas.width,\n  _viewportHeight = _canvas.height,\n  _currentWidth = 0,\n  _currentHeight = 0,\n\n  // frustum\n\n  _frustum = new THREE.Frustum(),\n\n  // camera matrices cache\n\n  _projScreenMatrix = new THREE.Matrix4(),\n\n  _vector3 = new THREE.Vector3(),\n\n  // light arrays cache\n\n  _direction = new THREE.Vector3(),\n\n  _lightsNeedUpdate = true,\n\n  _lights = {\n\n    ambient: [0, 0, 0],\n    directional: { length: 0, colors: [], positions: [] },\n    point: { length: 0, colors: [], positions: [], distances: [], decays: [] },\n    spot: { length: 0, colors: [], positions: [], distances: [], directions: [], anglesCos: [], exponents: [], decays: [] },\n    hemi: { length: 0, skyColors: [], groundColors: [], positions: [] } };\n\n\n\n  // initialize\n\n  var _gl;\n\n  try {\n\n    var attributes = {\n      alpha: _alpha,\n      depth: _depth,\n      stencil: _stencil,\n      antialias: _antialias,\n      premultipliedAlpha: _premultipliedAlpha,\n      preserveDrawingBuffer: _preserveDrawingBuffer };\n\n\n    _gl = _context || _canvas.getContext('webgl', attributes) || _canvas.getContext('experimental-webgl', attributes);\n\n    if (_gl === null) {\n\n      if (_canvas.getContext('webgl') !== null) {\n\n        throw 'Error creating WebGL context with your selected attributes.';\n\n      } else {\n\n        throw 'Error creating WebGL context.';\n\n      }\n\n    }\n\n    _canvas.addEventListener('webglcontextlost', function (event) {\n\n      event.preventDefault();\n\n      resetGLState();\n      setDefaultGLState();\n\n      _webglObjects = {};\n\n    }, false);\n\n  } catch (error) {\n\n    THREE.error('THREE.WebGLRenderer: ' + error);\n\n  }\n\n  var state = new THREE.WebGLState(_gl, paramThreeToGL);\n\n  if (_gl.getShaderPrecisionFormat === undefined) {\n\n    _gl.getShaderPrecisionFormat = function () {\n\n      return {\n        'rangeMin': 1,\n        'rangeMax': 1,\n        'precision': 1 };\n\n\n    };\n\n  }\n\n  var extensions = new THREE.WebGLExtensions(_gl);\n\n  extensions.get('OES_texture_float');\n  extensions.get('OES_texture_float_linear');\n  extensions.get('OES_texture_half_float');\n  extensions.get('OES_texture_half_float_linear');\n  extensions.get('OES_standard_derivatives');\n\n  if (_logarithmicDepthBuffer) {\n\n    extensions.get('EXT_frag_depth');\n\n  }\n\n  //\n\n  var glClearColor = function glClearColor(r, g, b, a) {\n\n    if (_premultipliedAlpha === true) {\n\n      r *= a;g *= a;b *= a;\n\n    }\n\n    _gl.clearColor(r, g, b, a);\n\n  };\n\n  var setDefaultGLState = function setDefaultGLState() {\n\n    _gl.clearColor(0, 0, 0, 1);\n    _gl.clearDepth(1);\n    _gl.clearStencil(0);\n\n    _gl.enable(_gl.DEPTH_TEST);\n    _gl.depthFunc(_gl.LEQUAL);\n\n    _gl.frontFace(_gl.CCW);\n    _gl.cullFace(_gl.BACK);\n    _gl.enable(_gl.CULL_FACE);\n\n    _gl.enable(_gl.BLEND);\n    _gl.blendEquation(_gl.FUNC_ADD);\n    _gl.blendFunc(_gl.SRC_ALPHA, _gl.ONE_MINUS_SRC_ALPHA);\n\n    _gl.viewport(_viewportX, _viewportY, _viewportWidth, _viewportHeight);\n\n    glClearColor(_clearColor.r, _clearColor.g, _clearColor.b, _clearAlpha);\n\n  };\n\n  var resetGLState = function resetGLState() {\n\n    _currentProgram = null;\n    _currentCamera = null;\n\n    _currentGeometryProgram = '';\n    _currentMaterialId = -1;\n\n    _lightsNeedUpdate = true;\n\n    state.reset();\n\n  };\n\n  setDefaultGLState();\n\n  this.context = _gl;\n  this.state = state;\n\n  // GPU capabilities\n\n  var _maxTextures = _gl.getParameter(_gl.MAX_TEXTURE_IMAGE_UNITS);\n  var _maxVertexTextures = _gl.getParameter(_gl.MAX_VERTEX_TEXTURE_IMAGE_UNITS);\n  var _maxTextureSize = _gl.getParameter(_gl.MAX_TEXTURE_SIZE);\n  var _maxCubemapSize = _gl.getParameter(_gl.MAX_CUBE_MAP_TEXTURE_SIZE);\n\n  var _supportsVertexTextures = _maxVertexTextures > 0;\n  var _supportsBoneTextures = _supportsVertexTextures && extensions.get('OES_texture_float');\n\n  //\n\n  var _vertexShaderPrecisionHighpFloat = _gl.getShaderPrecisionFormat(_gl.VERTEX_SHADER, _gl.HIGH_FLOAT);\n  var _vertexShaderPrecisionMediumpFloat = _gl.getShaderPrecisionFormat(_gl.VERTEX_SHADER, _gl.MEDIUM_FLOAT);\n\n  var _fragmentShaderPrecisionHighpFloat = _gl.getShaderPrecisionFormat(_gl.FRAGMENT_SHADER, _gl.HIGH_FLOAT);\n  var _fragmentShaderPrecisionMediumpFloat = _gl.getShaderPrecisionFormat(_gl.FRAGMENT_SHADER, _gl.MEDIUM_FLOAT);\n\n  var getCompressedTextureFormats = function () {\n\n    var array;\n\n    return function () {\n\n      if (array !== undefined) {\n\n        return array;\n\n      }\n\n      array = [];\n\n      if (extensions.get('WEBGL_compressed_texture_pvrtc') || extensions.get('WEBGL_compressed_texture_s3tc')) {\n\n        var formats = _gl.getParameter(_gl.COMPRESSED_TEXTURE_FORMATS);\n\n        for (var i = 0; i < formats.length; i++) {\n\n          array.push(formats[i]);\n\n        }\n\n      }\n\n      return array;\n\n    };\n\n  }();\n\n  // clamp precision to maximum available\n\n  var highpAvailable = _vertexShaderPrecisionHighpFloat.precision > 0 && _fragmentShaderPrecisionHighpFloat.precision > 0;\n  var mediumpAvailable = _vertexShaderPrecisionMediumpFloat.precision > 0 && _fragmentShaderPrecisionMediumpFloat.precision > 0;\n\n  if (_precision === 'highp' && !highpAvailable) {\n\n    if (mediumpAvailable) {\n\n      _precision = 'mediump';\n      THREE.warn('THREE.WebGLRenderer: highp not supported, using mediump.');\n\n    } else {\n\n      _precision = 'lowp';\n      THREE.warn('THREE.WebGLRenderer: highp and mediump not supported, using lowp.');\n\n    }\n\n  }\n\n  if (_precision === 'mediump' && !mediumpAvailable) {\n\n    _precision = 'lowp';\n    THREE.warn('THREE.WebGLRenderer: mediump not supported, using lowp.');\n\n  }\n\n  // Plugins\n\n  var shadowMapPlugin = new THREE.ShadowMapPlugin(this, lights, _webglObjects, _webglObjectsImmediate);\n\n  var spritePlugin = new THREE.SpritePlugin(this, sprites);\n  var lensFlarePlugin = new THREE.LensFlarePlugin(this, lensFlares);\n\n  // API\n\n  this.getContext = function () {\n\n    return _gl;\n\n  };\n\n  this.forceContextLoss = function () {\n\n    extensions.get('WEBGL_lose_context').loseContext();\n\n  };\n\n  this.supportsVertexTextures = function () {\n\n    return _supportsVertexTextures;\n\n  };\n\n  this.supportsFloatTextures = function () {\n\n    return extensions.get('OES_texture_float');\n\n  };\n\n  this.supportsHalfFloatTextures = function () {\n\n    return extensions.get('OES_texture_half_float');\n\n  };\n\n  this.supportsStandardDerivatives = function () {\n\n    return extensions.get('OES_standard_derivatives');\n\n  };\n\n  this.supportsCompressedTextureS3TC = function () {\n\n    return extensions.get('WEBGL_compressed_texture_s3tc');\n\n  };\n\n  this.supportsCompressedTexturePVRTC = function () {\n\n    return extensions.get('WEBGL_compressed_texture_pvrtc');\n\n  };\n\n  this.supportsBlendMinMax = function () {\n\n    return extensions.get('EXT_blend_minmax');\n\n  };\n\n  this.getMaxAnisotropy = function () {\n\n    var value;\n\n    return function () {\n\n      if (value !== undefined) {\n\n        return value;\n\n      }\n\n      var extension = extensions.get('EXT_texture_filter_anisotropic');\n\n      value = extension !== null ? _gl.getParameter(extension.MAX_TEXTURE_MAX_ANISOTROPY_EXT) : 0;\n\n      return value;\n\n    };\n\n  }();\n\n  this.getPrecision = function () {\n\n    return _precision;\n\n  };\n\n  this.getPixelRatio = function () {\n\n    return pixelRatio;\n\n  };\n\n  this.setPixelRatio = function (value) {\n\n    pixelRatio = value;\n\n  };\n\n  this.setSize = function (width, height, updateStyle) {\n\n    _canvas.width = width * pixelRatio;\n    _canvas.height = height * pixelRatio;\n\n    if (updateStyle !== false) {\n\n      _canvas.style.width = width + 'px';\n      _canvas.style.height = height + 'px';\n\n    }\n\n    this.setViewport(0, 0, width, height);\n\n  };\n\n  this.setViewport = function (x, y, width, height) {\n\n    _viewportX = x * pixelRatio;\n    _viewportY = y * pixelRatio;\n\n    _viewportWidth = width * pixelRatio;\n    _viewportHeight = height * pixelRatio;\n\n    _gl.viewport(_viewportX, _viewportY, _viewportWidth, _viewportHeight);\n\n  };\n\n  this.setScissor = function (x, y, width, height) {\n\n    _gl.scissor(\n    x * pixelRatio,\n    y * pixelRatio,\n    width * pixelRatio,\n    height * pixelRatio);\n\n\n  };\n\n  this.enableScissorTest = function (enable) {\n\n    enable ? _gl.enable(_gl.SCISSOR_TEST) : _gl.disable(_gl.SCISSOR_TEST);\n\n  };\n\n  // Clearing\n\n  this.getClearColor = function () {\n\n    return _clearColor;\n\n  };\n\n  this.setClearColor = function (color, alpha) {\n\n    _clearColor.set(color);\n\n    _clearAlpha = alpha !== undefined ? alpha : 1;\n\n    glClearColor(_clearColor.r, _clearColor.g, _clearColor.b, _clearAlpha);\n\n  };\n\n  this.getClearAlpha = function () {\n\n    return _clearAlpha;\n\n  };\n\n  this.setClearAlpha = function (alpha) {\n\n    _clearAlpha = alpha;\n\n    glClearColor(_clearColor.r, _clearColor.g, _clearColor.b, _clearAlpha);\n\n  };\n\n  this.clear = function (color, depth, stencil) {\n\n    var bits = 0;\n\n    if (color === undefined || color) bits |= _gl.COLOR_BUFFER_BIT;\n    if (depth === undefined || depth) bits |= _gl.DEPTH_BUFFER_BIT;\n    if (stencil === undefined || stencil) bits |= _gl.STENCIL_BUFFER_BIT;\n\n    _gl.clear(bits);\n\n  };\n\n  this.clearColor = function () {\n\n    _gl.clear(_gl.COLOR_BUFFER_BIT);\n\n  };\n\n  this.clearDepth = function () {\n\n    _gl.clear(_gl.DEPTH_BUFFER_BIT);\n\n  };\n\n  this.clearStencil = function () {\n\n    _gl.clear(_gl.STENCIL_BUFFER_BIT);\n\n  };\n\n  this.clearTarget = function (renderTarget, color, depth, stencil) {\n\n    this.setRenderTarget(renderTarget);\n    this.clear(color, depth, stencil);\n\n  };\n\n  // Reset\n\n  this.resetGLState = resetGLState;\n\n  // Buffer allocation\n\n  function createParticleBuffers(geometry) {\n\n    geometry.__webglVertexBuffer = _gl.createBuffer();\n    geometry.__webglColorBuffer = _gl.createBuffer();\n\n    _this.info.memory.geometries++;\n\n  };\n\n  function createLineBuffers(geometry) {\n\n    geometry.__webglVertexBuffer = _gl.createBuffer();\n    geometry.__webglColorBuffer = _gl.createBuffer();\n    geometry.__webglLineDistanceBuffer = _gl.createBuffer();\n\n    _this.info.memory.geometries++;\n\n  };\n\n  function createMeshBuffers(geometryGroup) {\n\n    geometryGroup.__webglVertexBuffer = _gl.createBuffer();\n    geometryGroup.__webglNormalBuffer = _gl.createBuffer();\n    geometryGroup.__webglTangentBuffer = _gl.createBuffer();\n    geometryGroup.__webglColorBuffer = _gl.createBuffer();\n    geometryGroup.__webglUVBuffer = _gl.createBuffer();\n    geometryGroup.__webglUV2Buffer = _gl.createBuffer();\n\n    geometryGroup.__webglSkinIndicesBuffer = _gl.createBuffer();\n    geometryGroup.__webglSkinWeightsBuffer = _gl.createBuffer();\n\n    geometryGroup.__webglFaceBuffer = _gl.createBuffer();\n    geometryGroup.__webglLineBuffer = _gl.createBuffer();\n\n    var numMorphTargets = geometryGroup.numMorphTargets;\n\n    if (numMorphTargets) {\n\n      geometryGroup.__webglMorphTargetsBuffers = [];\n\n      for (var m = 0, ml = numMorphTargets; m < ml; m++) {\n\n        geometryGroup.__webglMorphTargetsBuffers.push(_gl.createBuffer());\n\n      }\n\n    }\n\n    var numMorphNormals = geometryGroup.numMorphNormals;\n\n    if (numMorphNormals) {\n\n      geometryGroup.__webglMorphNormalsBuffers = [];\n\n      for (var m = 0, ml = numMorphNormals; m < ml; m++) {\n\n        geometryGroup.__webglMorphNormalsBuffers.push(_gl.createBuffer());\n\n      }\n\n    }\n\n    _this.info.memory.geometries++;\n\n  };\n\n  // Events\n\n  var onObjectRemoved = function onObjectRemoved(event) {\n\n    var object = event.target;\n\n    object.traverse(function (child) {\n\n      child.removeEventListener('remove', onObjectRemoved);\n\n      removeObject(child);\n\n    });\n\n  };\n\n  var onGeometryDispose = function onGeometryDispose(event) {\n\n    var geometry = event.target;\n\n    geometry.removeEventListener('dispose', onGeometryDispose);\n\n    deallocateGeometry(geometry);\n\n  };\n\n  var onTextureDispose = function onTextureDispose(event) {\n\n    var texture = event.target;\n\n    texture.removeEventListener('dispose', onTextureDispose);\n\n    deallocateTexture(texture);\n\n    _this.info.memory.textures--;\n\n\n  };\n\n  var onRenderTargetDispose = function onRenderTargetDispose(event) {\n\n    var renderTarget = event.target;\n\n    renderTarget.removeEventListener('dispose', onRenderTargetDispose);\n\n    deallocateRenderTarget(renderTarget);\n\n    _this.info.memory.textures--;\n\n  };\n\n  var onMaterialDispose = function onMaterialDispose(event) {\n\n    var material = event.target;\n\n    material.removeEventListener('dispose', onMaterialDispose);\n\n    deallocateMaterial(material);\n\n  };\n\n  // Buffer deallocation\n\n  var deleteBuffers = function deleteBuffers(geometry) {\n\n    var buffers = [\n    '__webglVertexBuffer',\n    '__webglNormalBuffer',\n    '__webglTangentBuffer',\n    '__webglColorBuffer',\n    '__webglUVBuffer',\n    '__webglUV2Buffer',\n\n    '__webglSkinIndicesBuffer',\n    '__webglSkinWeightsBuffer',\n\n    '__webglFaceBuffer',\n    '__webglLineBuffer',\n\n    '__webglLineDistanceBuffer'];\n\n\n    for (var i = 0, l = buffers.length; i < l; i++) {\n\n      var name = buffers[i];\n\n      if (geometry[name] !== undefined) {\n\n        _gl.deleteBuffer(geometry[name]);\n\n        delete geometry[name];\n\n      }\n\n    }\n\n    // custom attributes\n\n    if (geometry.__webglCustomAttributesList !== undefined) {\n\n      for (var name in geometry.__webglCustomAttributesList) {\n\n        _gl.deleteBuffer(geometry.__webglCustomAttributesList[name].buffer);\n\n      }\n\n      delete geometry.__webglCustomAttributesList;\n\n    }\n\n    _this.info.memory.geometries--;\n\n  };\n\n  var deallocateGeometry = function deallocateGeometry(geometry) {\n\n    delete geometry.__webglInit;\n\n    if (geometry instanceof THREE.BufferGeometry) {\n\n      for (var name in geometry.attributes) {\n\n        var attribute = geometry.attributes[name];\n\n        if (attribute.buffer !== undefined) {\n\n          _gl.deleteBuffer(attribute.buffer);\n\n          delete attribute.buffer;\n\n        }\n\n      }\n\n      _this.info.memory.geometries--;\n\n    } else {\n\n      var geometryGroupsList = geometryGroups[geometry.id];\n\n      if (geometryGroupsList !== undefined) {\n\n        for (var i = 0, l = geometryGroupsList.length; i < l; i++) {\n\n          var geometryGroup = geometryGroupsList[i];\n\n          if (geometryGroup.numMorphTargets !== undefined) {\n\n            for (var m = 0, ml = geometryGroup.numMorphTargets; m < ml; m++) {\n\n              _gl.deleteBuffer(geometryGroup.__webglMorphTargetsBuffers[m]);\n\n            }\n\n            delete geometryGroup.__webglMorphTargetsBuffers;\n\n          }\n\n          if (geometryGroup.numMorphNormals !== undefined) {\n\n            for (var m = 0, ml = geometryGroup.numMorphNormals; m < ml; m++) {\n\n              _gl.deleteBuffer(geometryGroup.__webglMorphNormalsBuffers[m]);\n\n            }\n\n            delete geometryGroup.__webglMorphNormalsBuffers;\n\n          }\n\n          deleteBuffers(geometryGroup);\n\n        }\n\n        delete geometryGroups[geometry.id];\n\n      } else {\n\n        deleteBuffers(geometry);\n\n      }\n\n    }\n\n    // TOFIX: Workaround for deleted geometry being currently bound\n\n    _currentGeometryProgram = '';\n\n  };\n\n  var deallocateTexture = function deallocateTexture(texture) {\n\n    if (texture.image && texture.image.__webglTextureCube) {\n\n      // cube texture\n\n      _gl.deleteTexture(texture.image.__webglTextureCube);\n\n      delete texture.image.__webglTextureCube;\n\n    } else {\n\n      // 2D texture\n\n      if (texture.__webglInit === undefined) return;\n\n      _gl.deleteTexture(texture.__webglTexture);\n\n      delete texture.__webglTexture;\n      delete texture.__webglInit;\n\n    }\n\n  };\n\n  var deallocateRenderTarget = function deallocateRenderTarget(renderTarget) {\n\n    if (!renderTarget || renderTarget.__webglTexture === undefined) return;\n\n    _gl.deleteTexture(renderTarget.__webglTexture);\n\n    delete renderTarget.__webglTexture;\n\n    if (renderTarget instanceof THREE.WebGLRenderTargetCube) {\n\n      for (var i = 0; i < 6; i++) {\n\n        _gl.deleteFramebuffer(renderTarget.__webglFramebuffer[i]);\n        _gl.deleteRenderbuffer(renderTarget.__webglRenderbuffer[i]);\n\n      }\n\n    } else {\n\n      _gl.deleteFramebuffer(renderTarget.__webglFramebuffer);\n      _gl.deleteRenderbuffer(renderTarget.__webglRenderbuffer);\n\n    }\n\n    delete renderTarget.__webglFramebuffer;\n    delete renderTarget.__webglRenderbuffer;\n\n  };\n\n  var deallocateMaterial = function deallocateMaterial(material) {\n\n    var program = material.program.program;\n\n    if (program === undefined) return;\n\n    material.program = undefined;\n\n    // only deallocate GL program if this was the last use of shared program\n    // assumed there is only single copy of any program in the _programs list\n    // (that's how it's constructed)\n\n    var i, il, programInfo;\n    var deleteProgram = false;\n\n    for (i = 0, il = _programs.length; i < il; i++) {\n\n      programInfo = _programs[i];\n\n      if (programInfo.program === program) {\n\n        programInfo.usedTimes--;\n\n        if (programInfo.usedTimes === 0) {\n\n          deleteProgram = true;\n\n        }\n\n        break;\n\n      }\n\n    }\n\n    if (deleteProgram === true) {\n\n      // avoid using array.splice, this is costlier than creating new array from scratch\n\n      var newPrograms = [];\n\n      for (i = 0, il = _programs.length; i < il; i++) {\n\n        programInfo = _programs[i];\n\n        if (programInfo.program !== program) {\n\n          newPrograms.push(programInfo);\n\n        }\n\n      }\n\n      _programs = newPrograms;\n\n      _gl.deleteProgram(program);\n\n      _this.info.memory.programs--;\n\n    }\n\n  };\n\n  // Buffer initialization\n\n  function initCustomAttributes(object) {\n\n    var geometry = object.geometry;\n    var material = object.material;\n\n    var nvertices = geometry.vertices.length;\n\n    if (material.attributes) {\n\n      if (geometry.__webglCustomAttributesList === undefined) {\n\n        geometry.__webglCustomAttributesList = [];\n\n      }\n\n      for (var name in material.attributes) {\n\n        var attribute = material.attributes[name];\n\n        if (!attribute.__webglInitialized || attribute.createUniqueBuffers) {\n\n          attribute.__webglInitialized = true;\n\n          var size = 1; // \"f\" and \"i\"\n\n          if (attribute.type === 'v2') size = 2;else\n          if (attribute.type === 'v3') size = 3;else\n          if (attribute.type === 'v4') size = 4;else\n          if (attribute.type === 'c') size = 3;\n\n          attribute.size = size;\n\n          attribute.array = new Float32Array(nvertices * size);\n\n          attribute.buffer = _gl.createBuffer();\n          attribute.buffer.belongsToAttribute = name;\n\n          attribute.needsUpdate = true;\n\n        }\n\n        geometry.__webglCustomAttributesList.push(attribute);\n\n      }\n\n    }\n\n  };\n\n  function initParticleBuffers(geometry, object) {\n\n    var nvertices = geometry.vertices.length;\n\n    geometry.__vertexArray = new Float32Array(nvertices * 3);\n    geometry.__colorArray = new Float32Array(nvertices * 3);\n\n    geometry.__webglParticleCount = nvertices;\n\n    initCustomAttributes(object);\n\n  };\n\n  function initLineBuffers(geometry, object) {\n\n    var nvertices = geometry.vertices.length;\n\n    geometry.__vertexArray = new Float32Array(nvertices * 3);\n    geometry.__colorArray = new Float32Array(nvertices * 3);\n    geometry.__lineDistanceArray = new Float32Array(nvertices * 1);\n\n    geometry.__webglLineCount = nvertices;\n\n    initCustomAttributes(object);\n\n  };\n\n  function initMeshBuffers(geometryGroup, object) {\n\n    var geometry = object.geometry,\n    faces3 = geometryGroup.faces3,\n\n    nvertices = faces3.length * 3,\n    ntris = faces3.length * 1,\n    nlines = faces3.length * 3,\n\n    material = getBufferMaterial(object, geometryGroup);\n\n    geometryGroup.__vertexArray = new Float32Array(nvertices * 3);\n    geometryGroup.__normalArray = new Float32Array(nvertices * 3);\n    geometryGroup.__colorArray = new Float32Array(nvertices * 3);\n    geometryGroup.__uvArray = new Float32Array(nvertices * 2);\n\n    if (geometry.faceVertexUvs.length > 1) {\n\n      geometryGroup.__uv2Array = new Float32Array(nvertices * 2);\n\n    }\n\n    if (geometry.hasTangents) {\n\n      geometryGroup.__tangentArray = new Float32Array(nvertices * 4);\n\n    }\n\n    if (object.geometry.skinWeights.length && object.geometry.skinIndices.length) {\n\n      geometryGroup.__skinIndexArray = new Float32Array(nvertices * 4);\n      geometryGroup.__skinWeightArray = new Float32Array(nvertices * 4);\n\n    }\n\n    var UintArray = extensions.get('OES_element_index_uint') !== null && ntris > 21845 ? Uint32Array : Uint16Array; // 65535 / 3\n\n    geometryGroup.__typeArray = UintArray;\n    geometryGroup.__faceArray = new UintArray(ntris * 3);\n    geometryGroup.__lineArray = new UintArray(nlines * 2);\n\n    var numMorphTargets = geometryGroup.numMorphTargets;\n\n    if (numMorphTargets) {\n\n      geometryGroup.__morphTargetsArrays = [];\n\n      for (var m = 0, ml = numMorphTargets; m < ml; m++) {\n\n        geometryGroup.__morphTargetsArrays.push(new Float32Array(nvertices * 3));\n\n      }\n\n    }\n\n    var numMorphNormals = geometryGroup.numMorphNormals;\n\n    if (numMorphNormals) {\n\n      geometryGroup.__morphNormalsArrays = [];\n\n      for (var m = 0, ml = numMorphNormals; m < ml; m++) {\n\n        geometryGroup.__morphNormalsArrays.push(new Float32Array(nvertices * 3));\n\n      }\n\n    }\n\n    geometryGroup.__webglFaceCount = ntris * 3;\n    geometryGroup.__webglLineCount = nlines * 2;\n\n\n    // custom attributes\n\n    if (material.attributes) {\n\n      if (geometryGroup.__webglCustomAttributesList === undefined) {\n\n        geometryGroup.__webglCustomAttributesList = [];\n\n      }\n\n      for (var name in material.attributes) {\n\n        // Do a shallow copy of the attribute object so different geometryGroup chunks use different\n        // attribute buffers which are correctly indexed in the setMeshBuffers function\n\n        var originalAttribute = material.attributes[name];\n\n        var attribute = {};\n\n        for (var property in originalAttribute) {\n\n          attribute[property] = originalAttribute[property];\n\n        }\n\n        if (!attribute.__webglInitialized || attribute.createUniqueBuffers) {\n\n          attribute.__webglInitialized = true;\n\n          var size = 1; // \"f\" and \"i\"\n\n          if (attribute.type === 'v2') size = 2;else\n          if (attribute.type === 'v3') size = 3;else\n          if (attribute.type === 'v4') size = 4;else\n          if (attribute.type === 'c') size = 3;\n\n          attribute.size = size;\n\n          attribute.array = new Float32Array(nvertices * size);\n\n          attribute.buffer = _gl.createBuffer();\n          attribute.buffer.belongsToAttribute = name;\n\n          originalAttribute.needsUpdate = true;\n          attribute.__original = originalAttribute;\n\n        }\n\n        geometryGroup.__webglCustomAttributesList.push(attribute);\n\n      }\n\n    }\n\n    geometryGroup.__inittedArrays = true;\n\n  };\n\n  function getBufferMaterial(object, geometryGroup) {\n\n    return object.material instanceof THREE.MeshFaceMaterial ?\n    object.material.materials[geometryGroup.materialIndex] :\n    object.material;\n\n  }\n\n  function materialNeedsFaceNormals(material) {\n\n    return material instanceof THREE.MeshPhongMaterial === false && material.shading === THREE.FlatShading;\n\n  }\n\n  // Buffer setting\n\n  function setParticleBuffers(geometry, hint, object) {\n\n    var v,c,vertex,offset,color,\n\n    vertices = geometry.vertices,\n    vl = vertices.length,\n\n    colors = geometry.colors,\n    cl = colors.length,\n\n    vertexArray = geometry.__vertexArray,\n    colorArray = geometry.__colorArray,\n\n    dirtyVertices = geometry.verticesNeedUpdate,\n    dirtyColors = geometry.colorsNeedUpdate,\n\n    customAttributes = geometry.__webglCustomAttributesList,\n    i,il,\n    ca,cal,value,\n    customAttribute;\n\n    if (dirtyVertices) {\n\n      for (v = 0; v < vl; v++) {\n\n        vertex = vertices[v];\n\n        offset = v * 3;\n\n        vertexArray[offset] = vertex.x;\n        vertexArray[offset + 1] = vertex.y;\n        vertexArray[offset + 2] = vertex.z;\n\n      }\n\n      _gl.bindBuffer(_gl.ARRAY_BUFFER, geometry.__webglVertexBuffer);\n      _gl.bufferData(_gl.ARRAY_BUFFER, vertexArray, hint);\n\n    }\n\n    if (dirtyColors) {\n\n      for (c = 0; c < cl; c++) {\n\n        color = colors[c];\n\n        offset = c * 3;\n\n        colorArray[offset] = color.r;\n        colorArray[offset + 1] = color.g;\n        colorArray[offset + 2] = color.b;\n\n      }\n\n      _gl.bindBuffer(_gl.ARRAY_BUFFER, geometry.__webglColorBuffer);\n      _gl.bufferData(_gl.ARRAY_BUFFER, colorArray, hint);\n\n    }\n\n    if (customAttributes) {\n\n      for (i = 0, il = customAttributes.length; i < il; i++) {\n\n        customAttribute = customAttributes[i];\n\n        if (customAttribute.needsUpdate && (customAttribute.boundTo === undefined || customAttribute.boundTo === 'vertices')) {\n\n          cal = customAttribute.value.length;\n\n          offset = 0;\n\n          if (customAttribute.size === 1) {\n\n            for (ca = 0; ca < cal; ca++) {\n\n              customAttribute.array[ca] = customAttribute.value[ca];\n\n            }\n\n          } else if (customAttribute.size === 2) {\n\n            for (ca = 0; ca < cal; ca++) {\n\n              value = customAttribute.value[ca];\n\n              customAttribute.array[offset] = value.x;\n              customAttribute.array[offset + 1] = value.y;\n\n              offset += 2;\n\n            }\n\n          } else if (customAttribute.size === 3) {\n\n            if (customAttribute.type === 'c') {\n\n              for (ca = 0; ca < cal; ca++) {\n\n                value = customAttribute.value[ca];\n\n                customAttribute.array[offset] = value.r;\n                customAttribute.array[offset + 1] = value.g;\n                customAttribute.array[offset + 2] = value.b;\n\n                offset += 3;\n\n              }\n\n            } else {\n\n              for (ca = 0; ca < cal; ca++) {\n\n                value = customAttribute.value[ca];\n\n                customAttribute.array[offset] = value.x;\n                customAttribute.array[offset + 1] = value.y;\n                customAttribute.array[offset + 2] = value.z;\n\n                offset += 3;\n\n              }\n\n            }\n\n          } else if (customAttribute.size === 4) {\n\n            for (ca = 0; ca < cal; ca++) {\n\n              value = customAttribute.value[ca];\n\n              customAttribute.array[offset] = value.x;\n              customAttribute.array[offset + 1] = value.y;\n              customAttribute.array[offset + 2] = value.z;\n              customAttribute.array[offset + 3] = value.w;\n\n              offset += 4;\n\n            }\n\n          }\n\n        }\n\n        _gl.bindBuffer(_gl.ARRAY_BUFFER, customAttribute.buffer);\n        _gl.bufferData(_gl.ARRAY_BUFFER, customAttribute.array, hint);\n\n        customAttribute.needsUpdate = false;\n\n      }\n\n    }\n\n  }\n\n  function setLineBuffers(geometry, hint) {\n\n    var v,c,d,vertex,offset,color,\n\n    vertices = geometry.vertices,\n    colors = geometry.colors,\n    lineDistances = geometry.lineDistances,\n\n    vl = vertices.length,\n    cl = colors.length,\n    dl = lineDistances.length,\n\n    vertexArray = geometry.__vertexArray,\n    colorArray = geometry.__colorArray,\n    lineDistanceArray = geometry.__lineDistanceArray,\n\n    dirtyVertices = geometry.verticesNeedUpdate,\n    dirtyColors = geometry.colorsNeedUpdate,\n    dirtyLineDistances = geometry.lineDistancesNeedUpdate,\n\n    customAttributes = geometry.__webglCustomAttributesList,\n\n    i,il,\n    ca,cal,value,\n    customAttribute;\n\n    if (dirtyVertices) {\n\n      for (v = 0; v < vl; v++) {\n\n        vertex = vertices[v];\n\n        offset = v * 3;\n\n        vertexArray[offset] = vertex.x;\n        vertexArray[offset + 1] = vertex.y;\n        vertexArray[offset + 2] = vertex.z;\n\n      }\n\n      _gl.bindBuffer(_gl.ARRAY_BUFFER, geometry.__webglVertexBuffer);\n      _gl.bufferData(_gl.ARRAY_BUFFER, vertexArray, hint);\n\n    }\n\n    if (dirtyColors) {\n\n      for (c = 0; c < cl; c++) {\n\n        color = colors[c];\n\n        offset = c * 3;\n\n        colorArray[offset] = color.r;\n        colorArray[offset + 1] = color.g;\n        colorArray[offset + 2] = color.b;\n\n      }\n\n      _gl.bindBuffer(_gl.ARRAY_BUFFER, geometry.__webglColorBuffer);\n      _gl.bufferData(_gl.ARRAY_BUFFER, colorArray, hint);\n\n    }\n\n    if (dirtyLineDistances) {\n\n      for (d = 0; d < dl; d++) {\n\n        lineDistanceArray[d] = lineDistances[d];\n\n      }\n\n      _gl.bindBuffer(_gl.ARRAY_BUFFER, geometry.__webglLineDistanceBuffer);\n      _gl.bufferData(_gl.ARRAY_BUFFER, lineDistanceArray, hint);\n\n    }\n\n    if (customAttributes) {\n\n      for (i = 0, il = customAttributes.length; i < il; i++) {\n\n        customAttribute = customAttributes[i];\n\n        if (customAttribute.needsUpdate && (customAttribute.boundTo === undefined || customAttribute.boundTo === 'vertices')) {\n\n          offset = 0;\n\n          cal = customAttribute.value.length;\n\n          if (customAttribute.size === 1) {\n\n            for (ca = 0; ca < cal; ca++) {\n\n              customAttribute.array[ca] = customAttribute.value[ca];\n\n            }\n\n          } else if (customAttribute.size === 2) {\n\n            for (ca = 0; ca < cal; ca++) {\n\n              value = customAttribute.value[ca];\n\n              customAttribute.array[offset] = value.x;\n              customAttribute.array[offset + 1] = value.y;\n\n              offset += 2;\n\n            }\n\n          } else if (customAttribute.size === 3) {\n\n            if (customAttribute.type === 'c') {\n\n              for (ca = 0; ca < cal; ca++) {\n\n                value = customAttribute.value[ca];\n\n                customAttribute.array[offset] = value.r;\n                customAttribute.array[offset + 1] = value.g;\n                customAttribute.array[offset + 2] = value.b;\n\n                offset += 3;\n\n              }\n\n            } else {\n\n              for (ca = 0; ca < cal; ca++) {\n\n                value = customAttribute.value[ca];\n\n                customAttribute.array[offset] = value.x;\n                customAttribute.array[offset + 1] = value.y;\n                customAttribute.array[offset + 2] = value.z;\n\n                offset += 3;\n\n              }\n\n            }\n\n          } else if (customAttribute.size === 4) {\n\n            for (ca = 0; ca < cal; ca++) {\n\n              value = customAttribute.value[ca];\n\n              customAttribute.array[offset] = value.x;\n              customAttribute.array[offset + 1] = value.y;\n              customAttribute.array[offset + 2] = value.z;\n              customAttribute.array[offset + 3] = value.w;\n\n              offset += 4;\n\n            }\n\n          }\n\n          _gl.bindBuffer(_gl.ARRAY_BUFFER, customAttribute.buffer);\n          _gl.bufferData(_gl.ARRAY_BUFFER, customAttribute.array, hint);\n\n          customAttribute.needsUpdate = false;\n\n        }\n\n      }\n\n    }\n\n  }\n\n  function setMeshBuffers(geometryGroup, object, hint, dispose, material) {\n\n    if (!geometryGroup.__inittedArrays) {\n\n      return;\n\n    }\n\n    var needsFaceNormals = materialNeedsFaceNormals(material);\n\n    var f,fl,fi,face,\n    vertexNormals,faceNormal,\n    vertexColors,faceColor,\n    vertexTangents,\n    uv,uv2,v1,v2,v3,t1,t2,t3,n1,n2,n3,\n    c1,c2,c3,\n    sw1,sw2,sw3,\n    si1,si2,si3,\n    i,il,\n    vn,uvi,uv2i,\n    vk,vkl,vka,\n    nka,chf,faceVertexNormals,\n\n    vertexIndex = 0,\n\n    offset = 0,\n    offset_uv = 0,\n    offset_uv2 = 0,\n    offset_face = 0,\n    offset_normal = 0,\n    offset_tangent = 0,\n    offset_line = 0,\n    offset_color = 0,\n    offset_skin = 0,\n    offset_morphTarget = 0,\n    offset_custom = 0,\n\n    value,\n\n    vertexArray = geometryGroup.__vertexArray,\n    uvArray = geometryGroup.__uvArray,\n    uv2Array = geometryGroup.__uv2Array,\n    normalArray = geometryGroup.__normalArray,\n    tangentArray = geometryGroup.__tangentArray,\n    colorArray = geometryGroup.__colorArray,\n\n    skinIndexArray = geometryGroup.__skinIndexArray,\n    skinWeightArray = geometryGroup.__skinWeightArray,\n\n    morphTargetsArrays = geometryGroup.__morphTargetsArrays,\n    morphNormalsArrays = geometryGroup.__morphNormalsArrays,\n\n    customAttributes = geometryGroup.__webglCustomAttributesList,\n    customAttribute,\n\n    faceArray = geometryGroup.__faceArray,\n    lineArray = geometryGroup.__lineArray,\n\n    geometry = object.geometry, // this is shared for all chunks\n\n    dirtyVertices = geometry.verticesNeedUpdate,\n    dirtyElements = geometry.elementsNeedUpdate,\n    dirtyUvs = geometry.uvsNeedUpdate,\n    dirtyNormals = geometry.normalsNeedUpdate,\n    dirtyTangents = geometry.tangentsNeedUpdate,\n    dirtyColors = geometry.colorsNeedUpdate,\n    dirtyMorphTargets = geometry.morphTargetsNeedUpdate,\n\n    vertices = geometry.vertices,\n    chunk_faces3 = geometryGroup.faces3,\n    obj_faces = geometry.faces,\n\n    obj_uvs = geometry.faceVertexUvs[0],\n    obj_uvs2 = geometry.faceVertexUvs[1],\n\n    obj_skinIndices = geometry.skinIndices,\n    obj_skinWeights = geometry.skinWeights,\n\n    morphTargets = geometry.morphTargets,\n    morphNormals = geometry.morphNormals;\n\n    if (dirtyVertices) {\n\n      for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n        face = obj_faces[chunk_faces3[f]];\n\n        v1 = vertices[face.a];\n        v2 = vertices[face.b];\n        v3 = vertices[face.c];\n\n        vertexArray[offset] = v1.x;\n        vertexArray[offset + 1] = v1.y;\n        vertexArray[offset + 2] = v1.z;\n\n        vertexArray[offset + 3] = v2.x;\n        vertexArray[offset + 4] = v2.y;\n        vertexArray[offset + 5] = v2.z;\n\n        vertexArray[offset + 6] = v3.x;\n        vertexArray[offset + 7] = v3.y;\n        vertexArray[offset + 8] = v3.z;\n\n        offset += 9;\n\n      }\n\n      _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglVertexBuffer);\n      _gl.bufferData(_gl.ARRAY_BUFFER, vertexArray, hint);\n\n    }\n\n    if (dirtyMorphTargets) {\n\n      for (vk = 0, vkl = morphTargets.length; vk < vkl; vk++) {\n\n        offset_morphTarget = 0;\n\n        for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n          chf = chunk_faces3[f];\n          face = obj_faces[chf];\n\n          // morph positions\n\n          v1 = morphTargets[vk].vertices[face.a];\n          v2 = morphTargets[vk].vertices[face.b];\n          v3 = morphTargets[vk].vertices[face.c];\n\n          vka = morphTargetsArrays[vk];\n\n          vka[offset_morphTarget] = v1.x;\n          vka[offset_morphTarget + 1] = v1.y;\n          vka[offset_morphTarget + 2] = v1.z;\n\n          vka[offset_morphTarget + 3] = v2.x;\n          vka[offset_morphTarget + 4] = v2.y;\n          vka[offset_morphTarget + 5] = v2.z;\n\n          vka[offset_morphTarget + 6] = v3.x;\n          vka[offset_morphTarget + 7] = v3.y;\n          vka[offset_morphTarget + 8] = v3.z;\n\n          // morph normals\n\n          if (material.morphNormals) {\n\n            if (needsFaceNormals) {\n\n              n1 = morphNormals[vk].faceNormals[chf];\n              n2 = n1;\n              n3 = n1;\n\n            } else {\n\n              faceVertexNormals = morphNormals[vk].vertexNormals[chf];\n\n              n1 = faceVertexNormals.a;\n              n2 = faceVertexNormals.b;\n              n3 = faceVertexNormals.c;\n\n            }\n\n            nka = morphNormalsArrays[vk];\n\n            nka[offset_morphTarget] = n1.x;\n            nka[offset_morphTarget + 1] = n1.y;\n            nka[offset_morphTarget + 2] = n1.z;\n\n            nka[offset_morphTarget + 3] = n2.x;\n            nka[offset_morphTarget + 4] = n2.y;\n            nka[offset_morphTarget + 5] = n2.z;\n\n            nka[offset_morphTarget + 6] = n3.x;\n            nka[offset_morphTarget + 7] = n3.y;\n            nka[offset_morphTarget + 8] = n3.z;\n\n          }\n\n          //\n\n          offset_morphTarget += 9;\n\n        }\n\n        _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglMorphTargetsBuffers[vk]);\n        _gl.bufferData(_gl.ARRAY_BUFFER, morphTargetsArrays[vk], hint);\n\n        if (material.morphNormals) {\n\n          _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglMorphNormalsBuffers[vk]);\n          _gl.bufferData(_gl.ARRAY_BUFFER, morphNormalsArrays[vk], hint);\n\n        }\n\n      }\n\n    }\n\n    if (obj_skinWeights.length) {\n\n      for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n        face = obj_faces[chunk_faces3[f]];\n\n        // weights\n\n        sw1 = obj_skinWeights[face.a];\n        sw2 = obj_skinWeights[face.b];\n        sw3 = obj_skinWeights[face.c];\n\n        skinWeightArray[offset_skin] = sw1.x;\n        skinWeightArray[offset_skin + 1] = sw1.y;\n        skinWeightArray[offset_skin + 2] = sw1.z;\n        skinWeightArray[offset_skin + 3] = sw1.w;\n\n        skinWeightArray[offset_skin + 4] = sw2.x;\n        skinWeightArray[offset_skin + 5] = sw2.y;\n        skinWeightArray[offset_skin + 6] = sw2.z;\n        skinWeightArray[offset_skin + 7] = sw2.w;\n\n        skinWeightArray[offset_skin + 8] = sw3.x;\n        skinWeightArray[offset_skin + 9] = sw3.y;\n        skinWeightArray[offset_skin + 10] = sw3.z;\n        skinWeightArray[offset_skin + 11] = sw3.w;\n\n        // indices\n\n        si1 = obj_skinIndices[face.a];\n        si2 = obj_skinIndices[face.b];\n        si3 = obj_skinIndices[face.c];\n\n        skinIndexArray[offset_skin] = si1.x;\n        skinIndexArray[offset_skin + 1] = si1.y;\n        skinIndexArray[offset_skin + 2] = si1.z;\n        skinIndexArray[offset_skin + 3] = si1.w;\n\n        skinIndexArray[offset_skin + 4] = si2.x;\n        skinIndexArray[offset_skin + 5] = si2.y;\n        skinIndexArray[offset_skin + 6] = si2.z;\n        skinIndexArray[offset_skin + 7] = si2.w;\n\n        skinIndexArray[offset_skin + 8] = si3.x;\n        skinIndexArray[offset_skin + 9] = si3.y;\n        skinIndexArray[offset_skin + 10] = si3.z;\n        skinIndexArray[offset_skin + 11] = si3.w;\n\n        offset_skin += 12;\n\n      }\n\n      if (offset_skin > 0) {\n\n        _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglSkinIndicesBuffer);\n        _gl.bufferData(_gl.ARRAY_BUFFER, skinIndexArray, hint);\n\n        _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglSkinWeightsBuffer);\n        _gl.bufferData(_gl.ARRAY_BUFFER, skinWeightArray, hint);\n\n      }\n\n    }\n\n    if (dirtyColors) {\n\n      for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n        face = obj_faces[chunk_faces3[f]];\n\n        vertexColors = face.vertexColors;\n        faceColor = face.color;\n\n        if (vertexColors.length === 3 && material.vertexColors === THREE.VertexColors) {\n\n          c1 = vertexColors[0];\n          c2 = vertexColors[1];\n          c3 = vertexColors[2];\n\n        } else {\n\n          c1 = faceColor;\n          c2 = faceColor;\n          c3 = faceColor;\n\n        }\n\n        colorArray[offset_color] = c1.r;\n        colorArray[offset_color + 1] = c1.g;\n        colorArray[offset_color + 2] = c1.b;\n\n        colorArray[offset_color + 3] = c2.r;\n        colorArray[offset_color + 4] = c2.g;\n        colorArray[offset_color + 5] = c2.b;\n\n        colorArray[offset_color + 6] = c3.r;\n        colorArray[offset_color + 7] = c3.g;\n        colorArray[offset_color + 8] = c3.b;\n\n        offset_color += 9;\n\n      }\n\n      if (offset_color > 0) {\n\n        _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglColorBuffer);\n        _gl.bufferData(_gl.ARRAY_BUFFER, colorArray, hint);\n\n      }\n\n    }\n\n    if (dirtyTangents && geometry.hasTangents) {\n\n      for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n        face = obj_faces[chunk_faces3[f]];\n\n        vertexTangents = face.vertexTangents;\n\n        t1 = vertexTangents[0];\n        t2 = vertexTangents[1];\n        t3 = vertexTangents[2];\n\n        tangentArray[offset_tangent] = t1.x;\n        tangentArray[offset_tangent + 1] = t1.y;\n        tangentArray[offset_tangent + 2] = t1.z;\n        tangentArray[offset_tangent + 3] = t1.w;\n\n        tangentArray[offset_tangent + 4] = t2.x;\n        tangentArray[offset_tangent + 5] = t2.y;\n        tangentArray[offset_tangent + 6] = t2.z;\n        tangentArray[offset_tangent + 7] = t2.w;\n\n        tangentArray[offset_tangent + 8] = t3.x;\n        tangentArray[offset_tangent + 9] = t3.y;\n        tangentArray[offset_tangent + 10] = t3.z;\n        tangentArray[offset_tangent + 11] = t3.w;\n\n        offset_tangent += 12;\n\n      }\n\n      _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglTangentBuffer);\n      _gl.bufferData(_gl.ARRAY_BUFFER, tangentArray, hint);\n\n    }\n\n    if (dirtyNormals) {\n\n      for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n        face = obj_faces[chunk_faces3[f]];\n\n        vertexNormals = face.vertexNormals;\n        faceNormal = face.normal;\n\n        if (vertexNormals.length === 3 && needsFaceNormals === false) {\n\n          for (i = 0; i < 3; i++) {\n\n            vn = vertexNormals[i];\n\n            normalArray[offset_normal] = vn.x;\n            normalArray[offset_normal + 1] = vn.y;\n            normalArray[offset_normal + 2] = vn.z;\n\n            offset_normal += 3;\n\n          }\n\n        } else {\n\n          for (i = 0; i < 3; i++) {\n\n            normalArray[offset_normal] = faceNormal.x;\n            normalArray[offset_normal + 1] = faceNormal.y;\n            normalArray[offset_normal + 2] = faceNormal.z;\n\n            offset_normal += 3;\n\n          }\n\n        }\n\n      }\n\n      _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglNormalBuffer);\n      _gl.bufferData(_gl.ARRAY_BUFFER, normalArray, hint);\n\n    }\n\n    if (dirtyUvs && obj_uvs) {\n\n      for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n        fi = chunk_faces3[f];\n\n        uv = obj_uvs[fi];\n\n        if (uv === undefined) continue;\n\n        for (i = 0; i < 3; i++) {\n\n          uvi = uv[i];\n\n          uvArray[offset_uv] = uvi.x;\n          uvArray[offset_uv + 1] = uvi.y;\n\n          offset_uv += 2;\n\n        }\n\n      }\n\n      if (offset_uv > 0) {\n\n        _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglUVBuffer);\n        _gl.bufferData(_gl.ARRAY_BUFFER, uvArray, hint);\n\n      }\n\n    }\n\n    if (dirtyUvs && obj_uvs2) {\n\n      for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n        fi = chunk_faces3[f];\n\n        uv2 = obj_uvs2[fi];\n\n        if (uv2 === undefined) continue;\n\n        for (i = 0; i < 3; i++) {\n\n          uv2i = uv2[i];\n\n          uv2Array[offset_uv2] = uv2i.x;\n          uv2Array[offset_uv2 + 1] = uv2i.y;\n\n          offset_uv2 += 2;\n\n        }\n\n      }\n\n      if (offset_uv2 > 0) {\n\n        _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglUV2Buffer);\n        _gl.bufferData(_gl.ARRAY_BUFFER, uv2Array, hint);\n\n      }\n\n    }\n\n    if (dirtyElements) {\n\n      for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n        faceArray[offset_face] = vertexIndex;\n        faceArray[offset_face + 1] = vertexIndex + 1;\n        faceArray[offset_face + 2] = vertexIndex + 2;\n\n        offset_face += 3;\n\n        lineArray[offset_line] = vertexIndex;\n        lineArray[offset_line + 1] = vertexIndex + 1;\n\n        lineArray[offset_line + 2] = vertexIndex;\n        lineArray[offset_line + 3] = vertexIndex + 2;\n\n        lineArray[offset_line + 4] = vertexIndex + 1;\n        lineArray[offset_line + 5] = vertexIndex + 2;\n\n        offset_line += 6;\n\n        vertexIndex += 3;\n\n      }\n\n      _gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER, geometryGroup.__webglFaceBuffer);\n      _gl.bufferData(_gl.ELEMENT_ARRAY_BUFFER, faceArray, hint);\n\n      _gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER, geometryGroup.__webglLineBuffer);\n      _gl.bufferData(_gl.ELEMENT_ARRAY_BUFFER, lineArray, hint);\n\n    }\n\n    if (customAttributes) {\n\n      for (i = 0, il = customAttributes.length; i < il; i++) {\n\n        customAttribute = customAttributes[i];\n\n        if (!customAttribute.__original.needsUpdate) continue;\n\n        offset_custom = 0;\n\n        if (customAttribute.size === 1) {\n\n          if (customAttribute.boundTo === undefined || customAttribute.boundTo === 'vertices') {\n\n            for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n              face = obj_faces[chunk_faces3[f]];\n\n              customAttribute.array[offset_custom] = customAttribute.value[face.a];\n              customAttribute.array[offset_custom + 1] = customAttribute.value[face.b];\n              customAttribute.array[offset_custom + 2] = customAttribute.value[face.c];\n\n              offset_custom += 3;\n\n            }\n\n          } else if (customAttribute.boundTo === 'faces') {\n\n            for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n              value = customAttribute.value[chunk_faces3[f]];\n\n              customAttribute.array[offset_custom] = value;\n              customAttribute.array[offset_custom + 1] = value;\n              customAttribute.array[offset_custom + 2] = value;\n\n              offset_custom += 3;\n\n            }\n\n          }\n\n        } else if (customAttribute.size === 2) {\n\n          if (customAttribute.boundTo === undefined || customAttribute.boundTo === 'vertices') {\n\n            for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n              face = obj_faces[chunk_faces3[f]];\n\n              v1 = customAttribute.value[face.a];\n              v2 = customAttribute.value[face.b];\n              v3 = customAttribute.value[face.c];\n\n              customAttribute.array[offset_custom] = v1.x;\n              customAttribute.array[offset_custom + 1] = v1.y;\n\n              customAttribute.array[offset_custom + 2] = v2.x;\n              customAttribute.array[offset_custom + 3] = v2.y;\n\n              customAttribute.array[offset_custom + 4] = v3.x;\n              customAttribute.array[offset_custom + 5] = v3.y;\n\n              offset_custom += 6;\n\n            }\n\n          } else if (customAttribute.boundTo === 'faces') {\n\n            for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n              value = customAttribute.value[chunk_faces3[f]];\n\n              v1 = value;\n              v2 = value;\n              v3 = value;\n\n              customAttribute.array[offset_custom] = v1.x;\n              customAttribute.array[offset_custom + 1] = v1.y;\n\n              customAttribute.array[offset_custom + 2] = v2.x;\n              customAttribute.array[offset_custom + 3] = v2.y;\n\n              customAttribute.array[offset_custom + 4] = v3.x;\n              customAttribute.array[offset_custom + 5] = v3.y;\n\n              offset_custom += 6;\n\n            }\n\n          }\n\n        } else if (customAttribute.size === 3) {\n\n          var pp;\n\n          if (customAttribute.type === 'c') {\n\n            pp = ['r', 'g', 'b'];\n\n          } else {\n\n            pp = ['x', 'y', 'z'];\n\n          }\n\n          if (customAttribute.boundTo === undefined || customAttribute.boundTo === 'vertices') {\n\n            for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n              face = obj_faces[chunk_faces3[f]];\n\n              v1 = customAttribute.value[face.a];\n              v2 = customAttribute.value[face.b];\n              v3 = customAttribute.value[face.c];\n\n              customAttribute.array[offset_custom] = v1[pp[0]];\n              customAttribute.array[offset_custom + 1] = v1[pp[1]];\n              customAttribute.array[offset_custom + 2] = v1[pp[2]];\n\n              customAttribute.array[offset_custom + 3] = v2[pp[0]];\n              customAttribute.array[offset_custom + 4] = v2[pp[1]];\n              customAttribute.array[offset_custom + 5] = v2[pp[2]];\n\n              customAttribute.array[offset_custom + 6] = v3[pp[0]];\n              customAttribute.array[offset_custom + 7] = v3[pp[1]];\n              customAttribute.array[offset_custom + 8] = v3[pp[2]];\n\n              offset_custom += 9;\n\n            }\n\n          } else if (customAttribute.boundTo === 'faces') {\n\n            for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n              value = customAttribute.value[chunk_faces3[f]];\n\n              v1 = value;\n              v2 = value;\n              v3 = value;\n\n              customAttribute.array[offset_custom] = v1[pp[0]];\n              customAttribute.array[offset_custom + 1] = v1[pp[1]];\n              customAttribute.array[offset_custom + 2] = v1[pp[2]];\n\n              customAttribute.array[offset_custom + 3] = v2[pp[0]];\n              customAttribute.array[offset_custom + 4] = v2[pp[1]];\n              customAttribute.array[offset_custom + 5] = v2[pp[2]];\n\n              customAttribute.array[offset_custom + 6] = v3[pp[0]];\n              customAttribute.array[offset_custom + 7] = v3[pp[1]];\n              customAttribute.array[offset_custom + 8] = v3[pp[2]];\n\n              offset_custom += 9;\n\n            }\n\n          } else if (customAttribute.boundTo === 'faceVertices') {\n\n            for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n              value = customAttribute.value[chunk_faces3[f]];\n\n              v1 = value[0];\n              v2 = value[1];\n              v3 = value[2];\n\n              customAttribute.array[offset_custom] = v1[pp[0]];\n              customAttribute.array[offset_custom + 1] = v1[pp[1]];\n              customAttribute.array[offset_custom + 2] = v1[pp[2]];\n\n              customAttribute.array[offset_custom + 3] = v2[pp[0]];\n              customAttribute.array[offset_custom + 4] = v2[pp[1]];\n              customAttribute.array[offset_custom + 5] = v2[pp[2]];\n\n              customAttribute.array[offset_custom + 6] = v3[pp[0]];\n              customAttribute.array[offset_custom + 7] = v3[pp[1]];\n              customAttribute.array[offset_custom + 8] = v3[pp[2]];\n\n              offset_custom += 9;\n\n            }\n\n          }\n\n        } else if (customAttribute.size === 4) {\n\n          if (customAttribute.boundTo === undefined || customAttribute.boundTo === 'vertices') {\n\n            for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n              face = obj_faces[chunk_faces3[f]];\n\n              v1 = customAttribute.value[face.a];\n              v2 = customAttribute.value[face.b];\n              v3 = customAttribute.value[face.c];\n\n              customAttribute.array[offset_custom] = v1.x;\n              customAttribute.array[offset_custom + 1] = v1.y;\n              customAttribute.array[offset_custom + 2] = v1.z;\n              customAttribute.array[offset_custom + 3] = v1.w;\n\n              customAttribute.array[offset_custom + 4] = v2.x;\n              customAttribute.array[offset_custom + 5] = v2.y;\n              customAttribute.array[offset_custom + 6] = v2.z;\n              customAttribute.array[offset_custom + 7] = v2.w;\n\n              customAttribute.array[offset_custom + 8] = v3.x;\n              customAttribute.array[offset_custom + 9] = v3.y;\n              customAttribute.array[offset_custom + 10] = v3.z;\n              customAttribute.array[offset_custom + 11] = v3.w;\n\n              offset_custom += 12;\n\n            }\n\n          } else if (customAttribute.boundTo === 'faces') {\n\n            for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n              value = customAttribute.value[chunk_faces3[f]];\n\n              v1 = value;\n              v2 = value;\n              v3 = value;\n\n              customAttribute.array[offset_custom] = v1.x;\n              customAttribute.array[offset_custom + 1] = v1.y;\n              customAttribute.array[offset_custom + 2] = v1.z;\n              customAttribute.array[offset_custom + 3] = v1.w;\n\n              customAttribute.array[offset_custom + 4] = v2.x;\n              customAttribute.array[offset_custom + 5] = v2.y;\n              customAttribute.array[offset_custom + 6] = v2.z;\n              customAttribute.array[offset_custom + 7] = v2.w;\n\n              customAttribute.array[offset_custom + 8] = v3.x;\n              customAttribute.array[offset_custom + 9] = v3.y;\n              customAttribute.array[offset_custom + 10] = v3.z;\n              customAttribute.array[offset_custom + 11] = v3.w;\n\n              offset_custom += 12;\n\n            }\n\n          } else if (customAttribute.boundTo === 'faceVertices') {\n\n            for (f = 0, fl = chunk_faces3.length; f < fl; f++) {\n\n              value = customAttribute.value[chunk_faces3[f]];\n\n              v1 = value[0];\n              v2 = value[1];\n              v3 = value[2];\n\n              customAttribute.array[offset_custom] = v1.x;\n              customAttribute.array[offset_custom + 1] = v1.y;\n              customAttribute.array[offset_custom + 2] = v1.z;\n              customAttribute.array[offset_custom + 3] = v1.w;\n\n              customAttribute.array[offset_custom + 4] = v2.x;\n              customAttribute.array[offset_custom + 5] = v2.y;\n              customAttribute.array[offset_custom + 6] = v2.z;\n              customAttribute.array[offset_custom + 7] = v2.w;\n\n              customAttribute.array[offset_custom + 8] = v3.x;\n              customAttribute.array[offset_custom + 9] = v3.y;\n              customAttribute.array[offset_custom + 10] = v3.z;\n              customAttribute.array[offset_custom + 11] = v3.w;\n\n              offset_custom += 12;\n\n            }\n\n          }\n\n        }\n\n        _gl.bindBuffer(_gl.ARRAY_BUFFER, customAttribute.buffer);\n        _gl.bufferData(_gl.ARRAY_BUFFER, customAttribute.array, hint);\n\n      }\n\n    }\n\n    if (dispose) {\n\n      delete geometryGroup.__inittedArrays;\n      delete geometryGroup.__colorArray;\n      delete geometryGroup.__normalArray;\n      delete geometryGroup.__tangentArray;\n      delete geometryGroup.__uvArray;\n      delete geometryGroup.__uv2Array;\n      delete geometryGroup.__faceArray;\n      delete geometryGroup.__vertexArray;\n      delete geometryGroup.__lineArray;\n      delete geometryGroup.__skinIndexArray;\n      delete geometryGroup.__skinWeightArray;\n\n    }\n\n  };\n\n  // Buffer rendering\n\n  this.renderBufferImmediate = function (object, program, material) {\n\n    state.initAttributes();\n\n    if (object.hasPositions && !object.__webglVertexBuffer) object.__webglVertexBuffer = _gl.createBuffer();\n    if (object.hasNormals && !object.__webglNormalBuffer) object.__webglNormalBuffer = _gl.createBuffer();\n    if (object.hasUvs && !object.__webglUvBuffer) object.__webglUvBuffer = _gl.createBuffer();\n    if (object.hasColors && !object.__webglColorBuffer) object.__webglColorBuffer = _gl.createBuffer();\n\n    if (object.hasPositions) {\n\n      _gl.bindBuffer(_gl.ARRAY_BUFFER, object.__webglVertexBuffer);\n      _gl.bufferData(_gl.ARRAY_BUFFER, object.positionArray, _gl.DYNAMIC_DRAW);\n\n      state.enableAttribute(program.attributes.position);\n\n      _gl.vertexAttribPointer(program.attributes.position, 3, _gl.FLOAT, false, 0, 0);\n\n    }\n\n    if (object.hasNormals) {\n\n      _gl.bindBuffer(_gl.ARRAY_BUFFER, object.__webglNormalBuffer);\n\n      if (material instanceof THREE.MeshPhongMaterial === false &&\n      material.shading === THREE.FlatShading) {\n\n        var nx,ny,nz,\n        nax,nbx,ncx,nay,nby,ncy,naz,nbz,ncz,\n        normalArray,\n        i,il = object.count * 3;\n\n        for (i = 0; i < il; i += 9) {\n\n          normalArray = object.normalArray;\n\n          nax = normalArray[i];\n          nay = normalArray[i + 1];\n          naz = normalArray[i + 2];\n\n          nbx = normalArray[i + 3];\n          nby = normalArray[i + 4];\n          nbz = normalArray[i + 5];\n\n          ncx = normalArray[i + 6];\n          ncy = normalArray[i + 7];\n          ncz = normalArray[i + 8];\n\n          nx = (nax + nbx + ncx) / 3;\n          ny = (nay + nby + ncy) / 3;\n          nz = (naz + nbz + ncz) / 3;\n\n          normalArray[i] = nx;\n          normalArray[i + 1] = ny;\n          normalArray[i + 2] = nz;\n\n          normalArray[i + 3] = nx;\n          normalArray[i + 4] = ny;\n          normalArray[i + 5] = nz;\n\n          normalArray[i + 6] = nx;\n          normalArray[i + 7] = ny;\n          normalArray[i + 8] = nz;\n\n        }\n\n      }\n\n      _gl.bufferData(_gl.ARRAY_BUFFER, object.normalArray, _gl.DYNAMIC_DRAW);\n\n      state.enableAttribute(program.attributes.normal);\n\n      _gl.vertexAttribPointer(program.attributes.normal, 3, _gl.FLOAT, false, 0, 0);\n\n    }\n\n    if (object.hasUvs && material.map) {\n\n      _gl.bindBuffer(_gl.ARRAY_BUFFER, object.__webglUvBuffer);\n      _gl.bufferData(_gl.ARRAY_BUFFER, object.uvArray, _gl.DYNAMIC_DRAW);\n\n      state.enableAttribute(program.attributes.uv);\n\n      _gl.vertexAttribPointer(program.attributes.uv, 2, _gl.FLOAT, false, 0, 0);\n\n    }\n\n    if (object.hasColors && material.vertexColors !== THREE.NoColors) {\n\n      _gl.bindBuffer(_gl.ARRAY_BUFFER, object.__webglColorBuffer);\n      _gl.bufferData(_gl.ARRAY_BUFFER, object.colorArray, _gl.DYNAMIC_DRAW);\n\n      state.enableAttribute(program.attributes.color);\n\n      _gl.vertexAttribPointer(program.attributes.color, 3, _gl.FLOAT, false, 0, 0);\n\n    }\n\n    state.disableUnusedAttributes();\n\n    _gl.drawArrays(_gl.TRIANGLES, 0, object.count);\n\n    object.count = 0;\n\n  };\n\n  function setupVertexAttributes(material, program, geometry, startIndex) {\n\n    var geometryAttributes = geometry.attributes;\n\n    var programAttributes = program.attributes;\n    var programAttributesKeys = program.attributesKeys;\n\n    for (var i = 0, l = programAttributesKeys.length; i < l; i++) {\n\n      var key = programAttributesKeys[i];\n      var programAttribute = programAttributes[key];\n\n      if (programAttribute >= 0) {\n\n        var geometryAttribute = geometryAttributes[key];\n\n        if (geometryAttribute !== undefined) {\n\n          var size = geometryAttribute.itemSize;\n\n          _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryAttribute.buffer);\n\n          state.enableAttribute(programAttribute);\n\n          _gl.vertexAttribPointer(programAttribute, size, _gl.FLOAT, false, 0, startIndex * size * 4); // 4 bytes per Float32\n\n        } else if (material.defaultAttributeValues !== undefined) {\n\n          if (material.defaultAttributeValues[key].length === 2) {\n\n            _gl.vertexAttrib2fv(programAttribute, material.defaultAttributeValues[key]);\n\n          } else if (material.defaultAttributeValues[key].length === 3) {\n\n            _gl.vertexAttrib3fv(programAttribute, material.defaultAttributeValues[key]);\n\n          }\n\n        }\n\n      }\n\n    }\n\n    state.disableUnusedAttributes();\n\n  }\n\n  this.renderBufferDirect = function (camera, lights, fog, material, geometry, object) {\n\n    if (material.visible === false) return;\n\n    updateObject(object);\n\n    var program = setProgram(camera, lights, fog, material, object);\n\n    var updateBuffers = false,\n    wireframeBit = material.wireframe ? 1 : 0,\n    geometryProgram = 'direct_' + geometry.id + '_' + program.id + '_' + wireframeBit;\n\n    if (geometryProgram !== _currentGeometryProgram) {\n\n      _currentGeometryProgram = geometryProgram;\n      updateBuffers = true;\n\n    }\n\n    if (updateBuffers) {\n\n      state.initAttributes();\n\n    }\n\n    // render mesh\n\n    if (object instanceof THREE.Mesh) {\n\n      var mode = material.wireframe === true ? _gl.LINES : _gl.TRIANGLES;\n\n      var index = geometry.attributes.index;\n\n      if (index) {\n\n        // indexed triangles\n\n        var type, size;\n\n        if (index.array instanceof Uint32Array && extensions.get('OES_element_index_uint')) {\n\n          type = _gl.UNSIGNED_INT;\n          size = 4;\n\n        } else {\n\n          type = _gl.UNSIGNED_SHORT;\n          size = 2;\n\n        }\n\n        var offsets = geometry.offsets;\n\n        if (offsets.length === 0) {\n\n          if (updateBuffers) {\n\n            setupVertexAttributes(material, program, geometry, 0);\n            _gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER, index.buffer);\n\n          }\n\n          _gl.drawElements(mode, index.array.length, type, 0);\n\n          _this.info.render.calls++;\n          _this.info.render.vertices += index.array.length; // not really true, here vertices can be shared\n          _this.info.render.faces += index.array.length / 3;\n\n        } else {\n\n          // if there is more than 1 chunk\n          // must set attribute pointers to use new offsets for each chunk\n          // even if geometry and materials didn't change\n\n          updateBuffers = true;\n\n          for (var i = 0, il = offsets.length; i < il; i++) {\n\n            var startIndex = offsets[i].index;\n\n            if (updateBuffers) {\n\n              setupVertexAttributes(material, program, geometry, startIndex);\n              _gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER, index.buffer);\n\n            }\n\n            // render indexed triangles\n\n            _gl.drawElements(mode, offsets[i].count, type, offsets[i].start * size);\n\n            _this.info.render.calls++;\n            _this.info.render.vertices += offsets[i].count; // not really true, here vertices can be shared\n            _this.info.render.faces += offsets[i].count / 3;\n\n          }\n\n        }\n\n      } else {\n\n        // non-indexed triangles\n\n        if (updateBuffers) {\n\n          setupVertexAttributes(material, program, geometry, 0);\n\n        }\n\n        var position = geometry.attributes['position'];\n\n        // render non-indexed triangles\n\n        _gl.drawArrays(mode, 0, position.array.length / position.itemSize);\n\n        _this.info.render.calls++;\n        _this.info.render.vertices += position.array.length / position.itemSize;\n        _this.info.render.faces += position.array.length / (3 * position.itemSize);\n\n      }\n\n    } else if (object instanceof THREE.PointCloud) {\n\n      // render particles\n\n      var mode = _gl.POINTS;\n\n      var index = geometry.attributes.index;\n\n      if (index) {\n\n        // indexed points\n\n        var type, size;\n\n        if (index.array instanceof Uint32Array && extensions.get('OES_element_index_uint')) {\n\n          type = _gl.UNSIGNED_INT;\n          size = 4;\n\n        } else {\n\n          type = _gl.UNSIGNED_SHORT;\n          size = 2;\n\n        }\n\n        var offsets = geometry.offsets;\n\n        if (offsets.length === 0) {\n\n          if (updateBuffers) {\n\n            setupVertexAttributes(material, program, geometry, 0);\n            _gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER, index.buffer);\n\n          }\n\n          _gl.drawElements(mode, index.array.length, type, 0);\n\n          _this.info.render.calls++;\n          _this.info.render.points += index.array.length;\n\n        } else {\n\n          // if there is more than 1 chunk\n          // must set attribute pointers to use new offsets for each chunk\n          // even if geometry and materials didn't change\n\n          if (offsets.length > 1) updateBuffers = true;\n\n          for (var i = 0, il = offsets.length; i < il; i++) {\n\n            var startIndex = offsets[i].index;\n\n            if (updateBuffers) {\n\n              setupVertexAttributes(material, program, geometry, startIndex);\n              _gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER, index.buffer);\n\n            }\n\n            // render indexed points\n\n            _gl.drawElements(mode, offsets[i].count, type, offsets[i].start * size);\n\n            _this.info.render.calls++;\n            _this.info.render.points += offsets[i].count;\n\n          }\n\n        }\n\n      } else {\n\n        // non-indexed points\n\n        if (updateBuffers) {\n\n          setupVertexAttributes(material, program, geometry, 0);\n\n        }\n\n        var position = geometry.attributes.position;\n        var offsets = geometry.offsets;\n\n        if (offsets.length === 0) {\n\n          _gl.drawArrays(mode, 0, position.array.length / 3);\n\n          _this.info.render.calls++;\n          _this.info.render.points += position.array.length / 3;\n\n        } else {\n\n          for (var i = 0, il = offsets.length; i < il; i++) {\n\n            _gl.drawArrays(mode, offsets[i].index, offsets[i].count);\n\n            _this.info.render.calls++;\n            _this.info.render.points += offsets[i].count;\n\n          }\n\n        }\n\n      }\n\n    } else if (object instanceof THREE.Line) {\n\n      var mode = object.mode === THREE.LineStrip ? _gl.LINE_STRIP : _gl.LINES;\n\n      state.setLineWidth(material.linewidth * pixelRatio);\n\n      var index = geometry.attributes.index;\n\n      if (index) {\n\n        // indexed lines\n\n        var type, size;\n\n        if (index.array instanceof Uint32Array) {\n\n          type = _gl.UNSIGNED_INT;\n          size = 4;\n\n        } else {\n\n          type = _gl.UNSIGNED_SHORT;\n          size = 2;\n\n        }\n\n        var offsets = geometry.offsets;\n\n        if (offsets.length === 0) {\n\n          if (updateBuffers) {\n\n            setupVertexAttributes(material, program, geometry, 0);\n            _gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER, index.buffer);\n\n          }\n\n          _gl.drawElements(mode, index.array.length, type, 0); // 2 bytes per Uint16Array\n\n          _this.info.render.calls++;\n          _this.info.render.vertices += index.array.length; // not really true, here vertices can be shared\n\n        } else {\n\n          // if there is more than 1 chunk\n          // must set attribute pointers to use new offsets for each chunk\n          // even if geometry and materials didn't change\n\n          if (offsets.length > 1) updateBuffers = true;\n\n          for (var i = 0, il = offsets.length; i < il; i++) {\n\n            var startIndex = offsets[i].index;\n\n            if (updateBuffers) {\n\n              setupVertexAttributes(material, program, geometry, startIndex);\n              _gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER, index.buffer);\n\n            }\n\n            // render indexed lines\n\n            _gl.drawElements(mode, offsets[i].count, type, offsets[i].start * size); // 2 bytes per Uint16Array\n\n            _this.info.render.calls++;\n            _this.info.render.vertices += offsets[i].count; // not really true, here vertices can be shared\n\n          }\n\n        }\n\n      } else {\n\n        // non-indexed lines\n\n        if (updateBuffers) {\n\n          setupVertexAttributes(material, program, geometry, 0);\n\n        }\n\n        var position = geometry.attributes.position;\n        var offsets = geometry.offsets;\n\n        if (offsets.length === 0) {\n\n          _gl.drawArrays(mode, 0, position.array.length / 3);\n\n          _this.info.render.calls++;\n          _this.info.render.vertices += position.array.length / 3;\n\n        } else {\n\n          for (var i = 0, il = offsets.length; i < il; i++) {\n\n            _gl.drawArrays(mode, offsets[i].index, offsets[i].count);\n\n            _this.info.render.calls++;\n            _this.info.render.vertices += offsets[i].count;\n\n          }\n\n        }\n\n      }\n\n    }\n\n  };\n\n  this.renderBuffer = function (camera, lights, fog, material, geometryGroup, object) {\n\n    if (material.visible === false) return;\n\n    updateObject(object);\n\n    var program = setProgram(camera, lights, fog, material, object);\n\n    var attributes = program.attributes;\n\n    var updateBuffers = false,\n    wireframeBit = material.wireframe ? 1 : 0,\n    geometryProgram = geometryGroup.id + '_' + program.id + '_' + wireframeBit;\n\n    if (geometryProgram !== _currentGeometryProgram) {\n\n      _currentGeometryProgram = geometryProgram;\n      updateBuffers = true;\n\n    }\n\n    if (updateBuffers) {\n\n      state.initAttributes();\n\n    }\n\n    // vertices\n\n    if (!material.morphTargets && attributes.position >= 0) {\n\n      if (updateBuffers) {\n\n        _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglVertexBuffer);\n\n        state.enableAttribute(attributes.position);\n\n        _gl.vertexAttribPointer(attributes.position, 3, _gl.FLOAT, false, 0, 0);\n\n      }\n\n    } else {\n\n      if (object.morphTargetBase) {\n\n        setupMorphTargets(material, geometryGroup, object);\n\n      }\n\n    }\n\n\n    if (updateBuffers) {\n\n      // custom attributes\n\n      // Use the per-geometryGroup custom attribute arrays which are setup in initMeshBuffers\n\n      if (geometryGroup.__webglCustomAttributesList) {\n\n        for (var i = 0, il = geometryGroup.__webglCustomAttributesList.length; i < il; i++) {\n\n          var attribute = geometryGroup.__webglCustomAttributesList[i];\n\n          if (attributes[attribute.buffer.belongsToAttribute] >= 0) {\n\n            _gl.bindBuffer(_gl.ARRAY_BUFFER, attribute.buffer);\n\n            state.enableAttribute(attributes[attribute.buffer.belongsToAttribute]);\n\n            _gl.vertexAttribPointer(attributes[attribute.buffer.belongsToAttribute], attribute.size, _gl.FLOAT, false, 0, 0);\n\n          }\n\n        }\n\n      }\n\n\n      // colors\n\n      if (attributes.color >= 0) {\n\n        if (object.geometry.colors.length > 0 || object.geometry.faces.length > 0) {\n\n          _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglColorBuffer);\n\n          state.enableAttribute(attributes.color);\n\n          _gl.vertexAttribPointer(attributes.color, 3, _gl.FLOAT, false, 0, 0);\n\n        } else if (material.defaultAttributeValues !== undefined) {\n\n\n          _gl.vertexAttrib3fv(attributes.color, material.defaultAttributeValues.color);\n\n        }\n\n      }\n\n      // normals\n\n      if (attributes.normal >= 0) {\n\n        _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglNormalBuffer);\n\n        state.enableAttribute(attributes.normal);\n\n        _gl.vertexAttribPointer(attributes.normal, 3, _gl.FLOAT, false, 0, 0);\n\n      }\n\n      // tangents\n\n      if (attributes.tangent >= 0) {\n\n        _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglTangentBuffer);\n\n        state.enableAttribute(attributes.tangent);\n\n        _gl.vertexAttribPointer(attributes.tangent, 4, _gl.FLOAT, false, 0, 0);\n\n      }\n\n      // uvs\n\n      if (attributes.uv >= 0) {\n\n        if (object.geometry.faceVertexUvs[0]) {\n\n          _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglUVBuffer);\n\n          state.enableAttribute(attributes.uv);\n\n          _gl.vertexAttribPointer(attributes.uv, 2, _gl.FLOAT, false, 0, 0);\n\n        } else if (material.defaultAttributeValues !== undefined) {\n\n\n          _gl.vertexAttrib2fv(attributes.uv, material.defaultAttributeValues.uv);\n\n        }\n\n      }\n\n      if (attributes.uv2 >= 0) {\n\n        if (object.geometry.faceVertexUvs[1]) {\n\n          _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglUV2Buffer);\n\n          state.enableAttribute(attributes.uv2);\n\n          _gl.vertexAttribPointer(attributes.uv2, 2, _gl.FLOAT, false, 0, 0);\n\n        } else if (material.defaultAttributeValues !== undefined) {\n\n\n          _gl.vertexAttrib2fv(attributes.uv2, material.defaultAttributeValues.uv2);\n\n        }\n\n      }\n\n      if (material.skinning &&\n      attributes.skinIndex >= 0 && attributes.skinWeight >= 0) {\n\n        _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglSkinIndicesBuffer);\n\n        state.enableAttribute(attributes.skinIndex);\n\n        _gl.vertexAttribPointer(attributes.skinIndex, 4, _gl.FLOAT, false, 0, 0);\n\n        _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglSkinWeightsBuffer);\n\n        state.enableAttribute(attributes.skinWeight);\n\n        _gl.vertexAttribPointer(attributes.skinWeight, 4, _gl.FLOAT, false, 0, 0);\n\n      }\n\n      // line distances\n\n      if (attributes.lineDistance >= 0) {\n\n        _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglLineDistanceBuffer);\n\n        state.enableAttribute(attributes.lineDistance);\n\n        _gl.vertexAttribPointer(attributes.lineDistance, 1, _gl.FLOAT, false, 0, 0);\n\n      }\n\n    }\n\n    state.disableUnusedAttributes();\n\n    // render mesh\n\n    if (object instanceof THREE.Mesh) {\n\n      var type = geometryGroup.__typeArray === Uint32Array ? _gl.UNSIGNED_INT : _gl.UNSIGNED_SHORT;\n\n      // wireframe\n\n      if (material.wireframe) {\n\n        state.setLineWidth(material.wireframeLinewidth * pixelRatio);\n\n        if (updateBuffers) _gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER, geometryGroup.__webglLineBuffer);\n        _gl.drawElements(_gl.LINES, geometryGroup.__webglLineCount, type, 0);\n\n        // triangles\n\n      } else {\n\n        if (updateBuffers) _gl.bindBuffer(_gl.ELEMENT_ARRAY_BUFFER, geometryGroup.__webglFaceBuffer);\n        _gl.drawElements(_gl.TRIANGLES, geometryGroup.__webglFaceCount, type, 0);\n\n      }\n\n      _this.info.render.calls++;\n      _this.info.render.vertices += geometryGroup.__webglFaceCount;\n      _this.info.render.faces += geometryGroup.__webglFaceCount / 3;\n\n      // render lines\n\n    } else if (object instanceof THREE.Line) {\n\n      var mode = object.mode === THREE.LineStrip ? _gl.LINE_STRIP : _gl.LINES;\n\n      state.setLineWidth(material.linewidth * pixelRatio);\n\n      _gl.drawArrays(mode, 0, geometryGroup.__webglLineCount);\n\n      _this.info.render.calls++;\n\n      // render particles\n\n    } else if (object instanceof THREE.PointCloud) {\n\n      _gl.drawArrays(_gl.POINTS, 0, geometryGroup.__webglParticleCount);\n\n      _this.info.render.calls++;\n      _this.info.render.points += geometryGroup.__webglParticleCount;\n\n    }\n\n  };\n\n  function setupMorphTargets(material, geometryGroup, object) {\n\n    // set base\n\n    var attributes = material.program.attributes;\n\n    if (object.morphTargetBase !== -1 && attributes.position >= 0) {\n\n      _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglMorphTargetsBuffers[object.morphTargetBase]);\n\n      state.enableAttribute(attributes.position);\n\n      _gl.vertexAttribPointer(attributes.position, 3, _gl.FLOAT, false, 0, 0);\n\n    } else if (attributes.position >= 0) {\n\n      _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglVertexBuffer);\n\n      state.enableAttribute(attributes.position);\n\n      _gl.vertexAttribPointer(attributes.position, 3, _gl.FLOAT, false, 0, 0);\n\n    }\n\n    if (object.morphTargetForcedOrder.length) {\n\n      // set forced order\n\n      var m = 0;\n      var order = object.morphTargetForcedOrder;\n      var influences = object.morphTargetInfluences;\n\n      var attribute;\n\n      while (m < material.numSupportedMorphTargets && m < order.length) {\n\n        attribute = attributes['morphTarget' + m];\n\n        if (attribute >= 0) {\n\n          _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglMorphTargetsBuffers[order[m]]);\n\n          state.enableAttribute(attribute);\n\n          _gl.vertexAttribPointer(attribute, 3, _gl.FLOAT, false, 0, 0);\n\n        }\n\n        attribute = attributes['morphNormal' + m];\n\n        if (attribute >= 0 && material.morphNormals) {\n\n          _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglMorphNormalsBuffers[order[m]]);\n\n          state.enableAttribute(attribute);\n\n          _gl.vertexAttribPointer(attribute, 3, _gl.FLOAT, false, 0, 0);\n\n        }\n\n        object.__webglMorphTargetInfluences[m] = influences[order[m]];\n\n        m++;\n\n      }\n\n    } else {\n\n      // find the most influencing\n\n      var activeInfluenceIndices = [];\n      var influences = object.morphTargetInfluences;\n      var morphTargets = object.geometry.morphTargets;\n\n      if (influences.length > morphTargets.length) {\n\n        console.warn('THREE.WebGLRenderer: Influences array is bigger than morphTargets array.');\n        influences.length = morphTargets.length;\n\n      }\n\n      for (var i = 0, il = influences.length; i < il; i++) {\n\n        var influence = influences[i];\n\n        activeInfluenceIndices.push([influence, i]);\n\n      }\n\n      if (activeInfluenceIndices.length > material.numSupportedMorphTargets) {\n\n        activeInfluenceIndices.sort(numericalSort);\n        activeInfluenceIndices.length = material.numSupportedMorphTargets;\n\n      } else if (activeInfluenceIndices.length > material.numSupportedMorphNormals) {\n\n        activeInfluenceIndices.sort(numericalSort);\n\n      } else if (activeInfluenceIndices.length === 0) {\n\n        activeInfluenceIndices.push([0, 0]);\n\n      }\n\n      var attribute;\n\n      for (var m = 0, ml = material.numSupportedMorphTargets; m < ml; m++) {\n\n        if (activeInfluenceIndices[m]) {\n\n          var influenceIndex = activeInfluenceIndices[m][1];\n\n          attribute = attributes['morphTarget' + m];\n\n          if (attribute >= 0) {\n\n            _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglMorphTargetsBuffers[influenceIndex]);\n\n            state.enableAttribute(attribute);\n\n            _gl.vertexAttribPointer(attribute, 3, _gl.FLOAT, false, 0, 0);\n\n          }\n\n          attribute = attributes['morphNormal' + m];\n\n          if (attribute >= 0 && material.morphNormals) {\n\n            _gl.bindBuffer(_gl.ARRAY_BUFFER, geometryGroup.__webglMorphNormalsBuffers[influenceIndex]);\n\n            state.enableAttribute(attribute);\n\n            _gl.vertexAttribPointer(attribute, 3, _gl.FLOAT, false, 0, 0);\n\n          }\n\n          object.__webglMorphTargetInfluences[m] = influences[influenceIndex];\n\n        } else {\n\n          /*\n                _gl.vertexAttribPointer( attributes[ \"morphTarget\" + m ], 3, _gl.FLOAT, false, 0, 0 );\n                \tif ( material.morphNormals ) {\n                \t\t_gl.vertexAttribPointer( attributes[ \"morphNormal\" + m ], 3, _gl.FLOAT, false, 0, 0 );\n                \t}\n                */\n\n\n\n\n          object.__webglMorphTargetInfluences[m] = 0;\n\n        }\n\n      }\n\n    }\n\n    // load updated influences uniform\n\n    if (material.program.uniforms.morphTargetInfluences !== null) {\n\n      _gl.uniform1fv(material.program.uniforms.morphTargetInfluences, object.__webglMorphTargetInfluences);\n\n    }\n\n  }\n\n  // Sorting\n\n  function painterSortStable(a, b) {\n\n    if (a.object.renderOrder !== b.object.renderOrder) {\n\n      return a.object.renderOrder - b.object.renderOrder;\n\n    } else if (a.material.id !== b.material.id) {\n\n      return a.material.id - b.material.id;\n\n    } else if (a.z !== b.z) {\n\n      return a.z - b.z;\n\n    } else {\n\n      return a.id - b.id;\n\n    }\n\n  }\n\n  function reversePainterSortStable(a, b) {\n\n    if (a.object.renderOrder !== b.object.renderOrder) {\n\n      return a.object.renderOrder - b.object.renderOrder;\n\n    }if (a.z !== b.z) {\n\n      return b.z - a.z;\n\n    } else {\n\n      return a.id - b.id;\n\n    }\n\n  }\n\n  function numericalSort(a, b) {\n\n    return b[0] - a[0];\n\n  }\n\n  // Rendering\n\n  this.render = function (scene, camera, renderTarget, forceClear) {\n\n    if (camera instanceof THREE.Camera === false) {\n\n      THREE.error('THREE.WebGLRenderer.render: camera is not an instance of THREE.Camera.');\n      return;\n\n    }\n\n    var fog = scene.fog;\n\n    // reset caching for this frame\n\n    _currentGeometryProgram = '';\n    _currentMaterialId = -1;\n    _currentCamera = null;\n    _lightsNeedUpdate = true;\n\n    // update scene graph\n\n    if (scene.autoUpdate === true) scene.updateMatrixWorld();\n\n    // update camera matrices and frustum\n\n    if (camera.parent === undefined) camera.updateMatrixWorld();\n\n    // update Skeleton objects\n\n    scene.traverse(function (object) {\n\n      if (object instanceof THREE.SkinnedMesh) {\n\n        object.skeleton.update();\n\n      }\n\n    });\n\n    camera.matrixWorldInverse.getInverse(camera.matrixWorld);\n\n    _projScreenMatrix.multiplyMatrices(camera.projectionMatrix, camera.matrixWorldInverse);\n    _frustum.setFromMatrix(_projScreenMatrix);\n\n    lights.length = 0;\n    opaqueObjects.length = 0;\n    transparentObjects.length = 0;\n\n    sprites.length = 0;\n    lensFlares.length = 0;\n\n    projectObject(scene);\n\n    if (_this.sortObjects === true) {\n\n      opaqueObjects.sort(painterSortStable);\n      transparentObjects.sort(reversePainterSortStable);\n\n    }\n\n    // custom render plugins (pre pass)\n\n    shadowMapPlugin.render(scene, camera);\n\n    //\n\n    _this.info.render.calls = 0;\n    _this.info.render.vertices = 0;\n    _this.info.render.faces = 0;\n    _this.info.render.points = 0;\n\n    this.setRenderTarget(renderTarget);\n\n    if (this.autoClear || forceClear) {\n\n      this.clear(this.autoClearColor, this.autoClearDepth, this.autoClearStencil);\n\n    }\n\n    // set matrices for immediate objects\n\n    for (var i = 0, il = _webglObjectsImmediate.length; i < il; i++) {\n\n      var webglObject = _webglObjectsImmediate[i];\n      var object = webglObject.object;\n\n      if (object.visible) {\n\n        setupMatrices(object, camera);\n\n        unrollImmediateBufferMaterial(webglObject);\n\n      }\n\n    }\n\n    if (scene.overrideMaterial) {\n\n      var overrideMaterial = scene.overrideMaterial;\n\n      setMaterial(overrideMaterial);\n\n      renderObjects(opaqueObjects, camera, lights, fog, overrideMaterial);\n      renderObjects(transparentObjects, camera, lights, fog, overrideMaterial);\n      renderObjectsImmediate(_webglObjectsImmediate, '', camera, lights, fog, overrideMaterial);\n\n    } else {\n\n      // opaque pass (front-to-back order)\n\n      state.setBlending(THREE.NoBlending);\n\n      renderObjects(opaqueObjects, camera, lights, fog, null);\n      renderObjectsImmediate(_webglObjectsImmediate, 'opaque', camera, lights, fog, null);\n\n      // transparent pass (back-to-front order)\n\n      renderObjects(transparentObjects, camera, lights, fog, null);\n      renderObjectsImmediate(_webglObjectsImmediate, 'transparent', camera, lights, fog, null);\n\n    }\n\n    // custom render plugins (post pass)\n\n    spritePlugin.render(scene, camera);\n    lensFlarePlugin.render(scene, camera, _currentWidth, _currentHeight);\n\n    // Generate mipmap if we're using any kind of mipmap filtering\n\n    if (renderTarget && renderTarget.generateMipmaps && renderTarget.minFilter !== THREE.NearestFilter && renderTarget.minFilter !== THREE.LinearFilter) {\n\n      updateRenderTargetMipmap(renderTarget);\n\n    }\n\n    // Ensure depth buffer writing is enabled so it can be cleared on next render\n\n    state.setDepthTest(true);\n    state.setDepthWrite(true);\n    state.setColorWrite(true);\n\n    // _gl.finish();\n\n  };\n\n  function projectObject(object) {\n\n    if (object.visible === false) return;\n\n    if (object instanceof THREE.Scene || object instanceof THREE.Group) {\n\n      // skip\n\n    } else {\n\n      initObject(object);\n\n      if (object instanceof THREE.Light) {\n\n        lights.push(object);\n\n      } else if (object instanceof THREE.Sprite) {\n\n        sprites.push(object);\n\n      } else if (object instanceof THREE.LensFlare) {\n\n        lensFlares.push(object);\n\n      } else {\n\n        var webglObjects = _webglObjects[object.id];\n\n        if (webglObjects && (object.frustumCulled === false || _frustum.intersectsObject(object) === true)) {\n\n          for (var i = 0, l = webglObjects.length; i < l; i++) {\n\n            var webglObject = webglObjects[i];\n\n            unrollBufferMaterial(webglObject);\n\n            webglObject.render = true;\n\n            if (_this.sortObjects === true) {\n\n              _vector3.setFromMatrixPosition(object.matrixWorld);\n              _vector3.applyProjection(_projScreenMatrix);\n\n              webglObject.z = _vector3.z;\n\n            }\n\n          }\n\n        }\n\n      }\n\n    }\n\n    for (var i = 0, l = object.children.length; i < l; i++) {\n\n      projectObject(object.children[i]);\n\n    }\n\n  }\n\n  function renderObjects(renderList, camera, lights, fog, overrideMaterial) {\n\n    var material;\n\n    for (var i = 0, l = renderList.length; i < l; i++) {\n\n      var webglObject = renderList[i];\n\n      var object = webglObject.object;\n      var buffer = webglObject.buffer;\n\n      setupMatrices(object, camera);\n\n      if (overrideMaterial) {\n\n        material = overrideMaterial;\n\n      } else {\n\n        material = webglObject.material;\n\n        if (!material) continue;\n\n        setMaterial(material);\n\n      }\n\n      _this.setMaterialFaces(material);\n\n      if (buffer instanceof THREE.BufferGeometry) {\n\n        _this.renderBufferDirect(camera, lights, fog, material, buffer, object);\n\n      } else {\n\n        _this.renderBuffer(camera, lights, fog, material, buffer, object);\n\n      }\n\n    }\n\n  }\n\n  function renderObjectsImmediate(renderList, materialType, camera, lights, fog, overrideMaterial) {\n\n    var material;\n\n    for (var i = 0, l = renderList.length; i < l; i++) {\n\n      var webglObject = renderList[i];\n      var object = webglObject.object;\n\n      if (object.visible) {\n\n        if (overrideMaterial) {\n\n          material = overrideMaterial;\n\n        } else {\n\n          material = webglObject[materialType];\n\n          if (!material) continue;\n\n          setMaterial(material);\n\n        }\n\n        _this.renderImmediateObject(camera, lights, fog, material, object);\n\n      }\n\n    }\n\n  }\n\n  this.renderImmediateObject = function (camera, lights, fog, material, object) {\n\n    var program = setProgram(camera, lights, fog, material, object);\n\n    _currentGeometryProgram = '';\n\n    _this.setMaterialFaces(material);\n\n    if (object.immediateRenderCallback) {\n\n      object.immediateRenderCallback(program, _gl, _frustum);\n\n    } else {\n\n      object.render(function (object) {_this.renderBufferImmediate(object, program, material);});\n\n    }\n\n  };\n\n  function unrollImmediateBufferMaterial(globject) {\n\n    var object = globject.object,\n    material = object.material;\n\n    if (material.transparent) {\n\n      globject.transparent = material;\n      globject.opaque = null;\n\n    } else {\n\n      globject.opaque = material;\n      globject.transparent = null;\n\n    }\n\n  }\n\n  function unrollBufferMaterial(globject) {\n\n    var object = globject.object;\n    var buffer = globject.buffer;\n\n    var geometry = object.geometry;\n    var material = object.material;\n\n    if (material instanceof THREE.MeshFaceMaterial) {\n\n      var materialIndex = geometry instanceof THREE.BufferGeometry ? 0 : buffer.materialIndex;\n\n      material = material.materials[materialIndex];\n\n      globject.material = material;\n\n      if (material.transparent) {\n\n        transparentObjects.push(globject);\n\n      } else {\n\n        opaqueObjects.push(globject);\n\n      }\n\n    } else if (material) {\n\n      globject.material = material;\n\n      if (material.transparent) {\n\n        transparentObjects.push(globject);\n\n      } else {\n\n        opaqueObjects.push(globject);\n\n      }\n\n    }\n\n  }\n\n  function initObject(object) {\n\n    if (object.__webglInit === undefined) {\n\n      object.__webglInit = true;\n      object._modelViewMatrix = new THREE.Matrix4();\n      object._normalMatrix = new THREE.Matrix3();\n\n      object.addEventListener('removed', onObjectRemoved);\n\n    }\n\n    var geometry = object.geometry;\n\n    if (geometry === undefined) {\n\n      // ImmediateRenderObject\n\n    } else if (geometry.__webglInit === undefined) {\n\n      geometry.__webglInit = true;\n      geometry.addEventListener('dispose', onGeometryDispose);\n\n      if (geometry instanceof THREE.BufferGeometry) {\n\n        _this.info.memory.geometries++;\n\n      } else if (object instanceof THREE.Mesh) {\n\n        initGeometryGroups(object, geometry);\n\n      } else if (object instanceof THREE.Line) {\n\n        if (geometry.__webglVertexBuffer === undefined) {\n\n          createLineBuffers(geometry);\n          initLineBuffers(geometry, object);\n\n          geometry.verticesNeedUpdate = true;\n          geometry.colorsNeedUpdate = true;\n          geometry.lineDistancesNeedUpdate = true;\n\n        }\n\n      } else if (object instanceof THREE.PointCloud) {\n\n        if (geometry.__webglVertexBuffer === undefined) {\n\n          createParticleBuffers(geometry);\n          initParticleBuffers(geometry, object);\n\n          geometry.verticesNeedUpdate = true;\n          geometry.colorsNeedUpdate = true;\n\n        }\n\n      }\n\n    }\n\n    if (object.__webglActive === undefined) {\n\n      object.__webglActive = true;\n\n      if (object instanceof THREE.Mesh) {\n\n        if (geometry instanceof THREE.BufferGeometry) {\n\n          addBuffer(_webglObjects, geometry, object);\n\n        } else if (geometry instanceof THREE.Geometry) {\n\n          var geometryGroupsList = geometryGroups[geometry.id];\n\n          for (var i = 0, l = geometryGroupsList.length; i < l; i++) {\n\n            addBuffer(_webglObjects, geometryGroupsList[i], object);\n\n          }\n\n        }\n\n      } else if (object instanceof THREE.Line || object instanceof THREE.PointCloud) {\n\n        addBuffer(_webglObjects, geometry, object);\n\n      } else if (object instanceof THREE.ImmediateRenderObject || object.immediateRenderCallback) {\n\n        addBufferImmediate(_webglObjectsImmediate, object);\n\n      }\n\n    }\n\n  }\n\n  // Geometry splitting\n\n  var geometryGroups = {};\n  var geometryGroupCounter = 0;\n\n  function makeGroups(geometry, usesFaceMaterial) {\n\n    var maxVerticesInGroup = extensions.get('OES_element_index_uint') ? 4294967296 : 65535;\n\n    var groupHash,hash_map = {};\n\n    var numMorphTargets = geometry.morphTargets.length;\n    var numMorphNormals = geometry.morphNormals.length;\n\n    var group;\n    var groups = {};\n    var groupsList = [];\n\n    for (var f = 0, fl = geometry.faces.length; f < fl; f++) {\n\n      var face = geometry.faces[f];\n      var materialIndex = usesFaceMaterial ? face.materialIndex : 0;\n\n      if (!(materialIndex in hash_map)) {\n\n        hash_map[materialIndex] = { hash: materialIndex, counter: 0 };\n\n      }\n\n      groupHash = hash_map[materialIndex].hash + '_' + hash_map[materialIndex].counter;\n\n      if (!(groupHash in groups)) {\n\n        group = {\n          id: geometryGroupCounter++,\n          faces3: [],\n          materialIndex: materialIndex,\n          vertices: 0,\n          numMorphTargets: numMorphTargets,\n          numMorphNormals: numMorphNormals };\n\n\n        groups[groupHash] = group;\n        groupsList.push(group);\n\n      }\n\n      if (groups[groupHash].vertices + 3 > maxVerticesInGroup) {\n\n        hash_map[materialIndex].counter += 1;\n        groupHash = hash_map[materialIndex].hash + '_' + hash_map[materialIndex].counter;\n\n        if (!(groupHash in groups)) {\n\n          group = {\n            id: geometryGroupCounter++,\n            faces3: [],\n            materialIndex: materialIndex,\n            vertices: 0,\n            numMorphTargets: numMorphTargets,\n            numMorphNormals: numMorphNormals };\n\n\n          groups[groupHash] = group;\n          groupsList.push(group);\n\n        }\n\n      }\n\n      groups[groupHash].faces3.push(f);\n      groups[groupHash].vertices += 3;\n\n    }\n\n    return groupsList;\n\n  }\n\n  function initGeometryGroups(object, geometry) {\n\n    var material = object.material,addBuffers = false;\n\n    if (geometryGroups[geometry.id] === undefined || geometry.groupsNeedUpdate === true) {\n\n      delete _webglObjects[object.id];\n\n      geometryGroups[geometry.id] = makeGroups(geometry, material instanceof THREE.MeshFaceMaterial);\n\n      geometry.groupsNeedUpdate = false;\n\n    }\n\n    var geometryGroupsList = geometryGroups[geometry.id];\n\n    // create separate VBOs per geometry chunk\n\n    for (var i = 0, il = geometryGroupsList.length; i < il; i++) {\n\n      var geometryGroup = geometryGroupsList[i];\n\n      // initialise VBO on the first access\n\n      if (geometryGroup.__webglVertexBuffer === undefined) {\n\n        createMeshBuffers(geometryGroup);\n        initMeshBuffers(geometryGroup, object);\n\n        geometry.verticesNeedUpdate = true;\n        geometry.morphTargetsNeedUpdate = true;\n        geometry.elementsNeedUpdate = true;\n        geometry.uvsNeedUpdate = true;\n        geometry.normalsNeedUpdate = true;\n        geometry.tangentsNeedUpdate = true;\n        geometry.colorsNeedUpdate = true;\n\n        addBuffers = true;\n\n      } else {\n\n        addBuffers = false;\n\n      }\n\n      if (addBuffers || object.__webglActive === undefined) {\n\n        addBuffer(_webglObjects, geometryGroup, object);\n\n      }\n\n    }\n\n    object.__webglActive = true;\n\n  }\n\n  function addBuffer(objlist, buffer, object) {\n\n    var id = object.id;\n    objlist[id] = objlist[id] || [];\n    objlist[id].push(\n    {\n      id: id,\n      buffer: buffer,\n      object: object,\n      material: null,\n      z: 0 });\n\n\n\n  };\n\n  function addBufferImmediate(objlist, object) {\n\n    objlist.push(\n    {\n      id: null,\n      object: object,\n      opaque: null,\n      transparent: null,\n      z: 0 });\n\n\n\n  };\n\n  // Objects updates\n\n  function updateObject(object) {\n\n    var geometry = object.geometry;\n\n    if (geometry instanceof THREE.BufferGeometry) {\n\n      var attributes = geometry.attributes;\n      var attributesKeys = geometry.attributesKeys;\n\n      for (var i = 0, l = attributesKeys.length; i < l; i++) {\n\n        var key = attributesKeys[i];\n        var attribute = attributes[key];\n        var bufferType = key === 'index' ? _gl.ELEMENT_ARRAY_BUFFER : _gl.ARRAY_BUFFER;\n\n        if (attribute.buffer === undefined) {\n\n          attribute.buffer = _gl.createBuffer();\n          _gl.bindBuffer(bufferType, attribute.buffer);\n          _gl.bufferData(bufferType, attribute.array, attribute instanceof THREE.DynamicBufferAttribute ? _gl.DYNAMIC_DRAW : _gl.STATIC_DRAW);\n\n          attribute.needsUpdate = false;\n\n        } else if (attribute.needsUpdate === true) {\n\n          _gl.bindBuffer(bufferType, attribute.buffer);\n\n          if (attribute.updateRange === undefined || attribute.updateRange.count === -1) {// Not using update ranges\n\n            _gl.bufferSubData(bufferType, 0, attribute.array);\n\n          } else if (attribute.updateRange.count === 0) {\n\n            console.error('THREE.WebGLRenderer.updateObject: using updateRange for THREE.DynamicBufferAttribute and marked as needsUpdate but count is 0, ensure you are using set methods or updating manually.');\n\n          } else {\n\n            _gl.bufferSubData(bufferType, attribute.updateRange.offset * attribute.array.BYTES_PER_ELEMENT,\n            attribute.array.subarray(attribute.updateRange.offset, attribute.updateRange.offset + attribute.updateRange.count));\n\n            attribute.updateRange.count = 0; // reset range\n\n          }\n\n          attribute.needsUpdate = false;\n\n        }\n\n      }\n\n    } else if (object instanceof THREE.Mesh) {\n\n      // check all geometry groups\n\n      if (geometry.groupsNeedUpdate === true) {\n\n        initGeometryGroups(object, geometry);\n\n      }\n\n      var geometryGroupsList = geometryGroups[geometry.id];\n\n      for (var i = 0, il = geometryGroupsList.length; i < il; i++) {\n\n        var geometryGroup = geometryGroupsList[i];\n        var material = getBufferMaterial(object, geometryGroup);\n\n        var customAttributesDirty = material.attributes && areCustomAttributesDirty(material);\n\n        if (geometry.verticesNeedUpdate || geometry.morphTargetsNeedUpdate || geometry.elementsNeedUpdate ||\n        geometry.uvsNeedUpdate || geometry.normalsNeedUpdate ||\n        geometry.colorsNeedUpdate || geometry.tangentsNeedUpdate || customAttributesDirty) {\n\n          setMeshBuffers(geometryGroup, object, _gl.DYNAMIC_DRAW, !geometry.dynamic, material);\n\n        }\n\n      }\n\n      geometry.verticesNeedUpdate = false;\n      geometry.morphTargetsNeedUpdate = false;\n      geometry.elementsNeedUpdate = false;\n      geometry.uvsNeedUpdate = false;\n      geometry.normalsNeedUpdate = false;\n      geometry.colorsNeedUpdate = false;\n      geometry.tangentsNeedUpdate = false;\n\n      material.attributes && clearCustomAttributes(material);\n\n    } else if (object instanceof THREE.Line) {\n\n      var material = getBufferMaterial(object, geometry);\n      var customAttributesDirty = material.attributes && areCustomAttributesDirty(material);\n\n      if (geometry.verticesNeedUpdate || geometry.colorsNeedUpdate || geometry.lineDistancesNeedUpdate || customAttributesDirty) {\n\n        setLineBuffers(geometry, _gl.DYNAMIC_DRAW);\n\n      }\n\n      geometry.verticesNeedUpdate = false;\n      geometry.colorsNeedUpdate = false;\n      geometry.lineDistancesNeedUpdate = false;\n\n      material.attributes && clearCustomAttributes(material);\n\n    } else if (object instanceof THREE.PointCloud) {\n\n      var material = getBufferMaterial(object, geometry);\n      var customAttributesDirty = material.attributes && areCustomAttributesDirty(material);\n\n      if (geometry.verticesNeedUpdate || geometry.colorsNeedUpdate || customAttributesDirty) {\n\n        setParticleBuffers(geometry, _gl.DYNAMIC_DRAW, object);\n\n      }\n\n      geometry.verticesNeedUpdate = false;\n      geometry.colorsNeedUpdate = false;\n\n      material.attributes && clearCustomAttributes(material);\n\n    }\n\n  }\n\n  // Objects updates - custom attributes check\n\n  function areCustomAttributesDirty(material) {\n\n    for (var name in material.attributes) {\n\n      if (material.attributes[name].needsUpdate) return true;\n\n    }\n\n    return false;\n\n  }\n\n  function clearCustomAttributes(material) {\n\n    for (var name in material.attributes) {\n\n      material.attributes[name].needsUpdate = false;\n\n    }\n\n  }\n\n  // Objects removal\n\n  function removeObject(object) {\n\n    if (object instanceof THREE.Mesh ||\n    object instanceof THREE.PointCloud ||\n    object instanceof THREE.Line) {\n\n      delete _webglObjects[object.id];\n\n    } else if (object instanceof THREE.ImmediateRenderObject || object.immediateRenderCallback) {\n\n      removeInstances(_webglObjectsImmediate, object);\n\n    }\n\n    delete object.__webglInit;\n    delete object._modelViewMatrix;\n    delete object._normalMatrix;\n\n    delete object.__webglActive;\n\n  }\n\n  function removeInstances(objlist, object) {\n\n    for (var o = objlist.length - 1; o >= 0; o--) {\n\n      if (objlist[o].object === object) {\n\n        objlist.splice(o, 1);\n\n      }\n\n    }\n\n  }\n\n  // Materials\n\n  var shaderIDs = {\n    MeshDepthMaterial: 'depth',\n    MeshNormalMaterial: 'normal',\n    MeshBasicMaterial: 'basic',\n    MeshLambertMaterial: 'lambert',\n    MeshPhongMaterial: 'phong',\n    LineBasicMaterial: 'basic',\n    LineDashedMaterial: 'dashed',\n    PointCloudMaterial: 'particle_basic' };\n\n\n  function initMaterial(material, lights, fog, object) {\n\n    material.addEventListener('dispose', onMaterialDispose);\n\n    var shaderID = shaderIDs[material.type];\n\n    if (shaderID) {\n\n      var shader = THREE.ShaderLib[shaderID];\n\n      material.__webglShader = {\n        uniforms: THREE.UniformsUtils.clone(shader.uniforms),\n        vertexShader: shader.vertexShader,\n        fragmentShader: shader.fragmentShader };\n\n\n    } else {\n\n      material.__webglShader = {\n        uniforms: material.uniforms,\n        vertexShader: material.vertexShader,\n        fragmentShader: material.fragmentShader };\n\n\n    }\n\n    // heuristics to create shader parameters according to lights in the scene\n    // (not to blow over maxLights budget)\n\n    var maxLightCount = allocateLights(lights);\n    var maxShadows = allocateShadows(lights);\n    var maxBones = allocateBones(object);\n\n    var parameters = {\n\n      precision: _precision,\n      supportsVertexTextures: _supportsVertexTextures,\n\n      map: !!material.map,\n      envMap: !!material.envMap,\n      envMapMode: material.envMap && material.envMap.mapping,\n      lightMap: !!material.lightMap,\n      bumpMap: !!material.bumpMap,\n      normalMap: !!material.normalMap,\n      specularMap: !!material.specularMap,\n      alphaMap: !!material.alphaMap,\n\n      combine: material.combine,\n\n      vertexColors: material.vertexColors,\n\n      fog: fog,\n      useFog: material.fog,\n      fogExp: fog instanceof THREE.FogExp2,\n\n      flatShading: material.shading === THREE.FlatShading,\n\n      sizeAttenuation: material.sizeAttenuation,\n      logarithmicDepthBuffer: _logarithmicDepthBuffer,\n\n      skinning: material.skinning,\n      maxBones: maxBones,\n      useVertexTexture: _supportsBoneTextures && object && object.skeleton && object.skeleton.useVertexTexture,\n\n      morphTargets: material.morphTargets,\n      morphNormals: material.morphNormals,\n      maxMorphTargets: _this.maxMorphTargets,\n      maxMorphNormals: _this.maxMorphNormals,\n\n      maxDirLights: maxLightCount.directional,\n      maxPointLights: maxLightCount.point,\n      maxSpotLights: maxLightCount.spot,\n      maxHemiLights: maxLightCount.hemi,\n\n      maxShadows: maxShadows,\n      shadowMapEnabled: _this.shadowMapEnabled && object.receiveShadow && maxShadows > 0,\n      shadowMapType: _this.shadowMapType,\n      shadowMapDebug: _this.shadowMapDebug,\n      shadowMapCascade: _this.shadowMapCascade,\n\n      alphaTest: material.alphaTest,\n      metal: material.metal,\n      wrapAround: material.wrapAround,\n      doubleSided: material.side === THREE.DoubleSide,\n      flipSided: material.side === THREE.BackSide };\n\n\n\n    // Generate code\n\n    var chunks = [];\n\n    if (shaderID) {\n\n      chunks.push(shaderID);\n\n    } else {\n\n      chunks.push(material.fragmentShader);\n      chunks.push(material.vertexShader);\n\n    }\n\n    if (material.defines !== undefined) {\n\n      for (var name in material.defines) {\n\n        chunks.push(name);\n        chunks.push(material.defines[name]);\n\n      }\n\n    }\n\n    for (var name in parameters) {\n\n      chunks.push(name);\n      chunks.push(parameters[name]);\n\n    }\n\n    var code = chunks.join();\n\n    var program;\n\n    // Check if code has been already compiled\n\n    for (var p = 0, pl = _programs.length; p < pl; p++) {\n\n      var programInfo = _programs[p];\n\n      if (programInfo.code === code) {\n\n        program = programInfo;\n        program.usedTimes++;\n\n        break;\n\n      }\n\n    }\n\n    if (program === undefined) {\n\n      program = new THREE.WebGLProgram(_this, code, material, parameters);\n      _programs.push(program);\n\n      _this.info.memory.programs = _programs.length;\n\n    }\n\n    material.program = program;\n\n    var attributes = program.attributes;\n\n    if (material.morphTargets) {\n\n      material.numSupportedMorphTargets = 0;\n\n      var id,base = 'morphTarget';\n\n      for (var i = 0; i < _this.maxMorphTargets; i++) {\n\n        id = base + i;\n\n        if (attributes[id] >= 0) {\n\n          material.numSupportedMorphTargets++;\n\n        }\n\n      }\n\n    }\n\n    if (material.morphNormals) {\n\n      material.numSupportedMorphNormals = 0;\n\n      var id,base = 'morphNormal';\n\n      for (i = 0; i < _this.maxMorphNormals; i++) {\n\n        id = base + i;\n\n        if (attributes[id] >= 0) {\n\n          material.numSupportedMorphNormals++;\n\n        }\n\n      }\n\n    }\n\n    material.uniformsList = [];\n\n    for (var u in material.__webglShader.uniforms) {\n\n      var location = material.program.uniforms[u];\n\n      if (location) {\n        material.uniformsList.push([material.__webglShader.uniforms[u], location]);\n      }\n\n    }\n\n  }\n\n  function setMaterial(material) {\n\n    if (material.transparent === true) {\n\n      state.setBlending(material.blending, material.blendEquation, material.blendSrc, material.blendDst, material.blendEquationAlpha, material.blendSrcAlpha, material.blendDstAlpha);\n\n    } else {\n\n      state.setBlending(THREE.NoBlending);\n\n    }\n\n    state.setDepthTest(material.depthTest);\n    state.setDepthWrite(material.depthWrite);\n    state.setColorWrite(material.colorWrite);\n    state.setPolygonOffset(material.polygonOffset, material.polygonOffsetFactor, material.polygonOffsetUnits);\n\n  }\n\n  function setProgram(camera, lights, fog, material, object) {\n\n    _usedTextureUnits = 0;\n\n    if (material.needsUpdate) {\n\n      if (material.program) deallocateMaterial(material);\n\n      initMaterial(material, lights, fog, object);\n      material.needsUpdate = false;\n\n    }\n\n    if (material.morphTargets) {\n\n      if (!object.__webglMorphTargetInfluences) {\n\n        object.__webglMorphTargetInfluences = new Float32Array(_this.maxMorphTargets);\n\n      }\n\n    }\n\n    var refreshProgram = false;\n    var refreshMaterial = false;\n    var refreshLights = false;\n\n    var program = material.program,\n    p_uniforms = program.uniforms,\n    m_uniforms = material.__webglShader.uniforms;\n\n    if (program.id !== _currentProgram) {\n\n      _gl.useProgram(program.program);\n      _currentProgram = program.id;\n\n      refreshProgram = true;\n      refreshMaterial = true;\n      refreshLights = true;\n\n    }\n\n    if (material.id !== _currentMaterialId) {\n\n      if (_currentMaterialId === -1) refreshLights = true;\n      _currentMaterialId = material.id;\n\n      refreshMaterial = true;\n\n    }\n\n    if (refreshProgram || camera !== _currentCamera) {\n\n      _gl.uniformMatrix4fv(p_uniforms.projectionMatrix, false, camera.projectionMatrix.elements);\n\n      if (_logarithmicDepthBuffer) {\n\n        _gl.uniform1f(p_uniforms.logDepthBufFC, 2.0 / (Math.log(camera.far + 1.0) / Math.LN2));\n\n      }\n\n\n      if (camera !== _currentCamera) _currentCamera = camera;\n\n      // load material specific uniforms\n      // (shader material also gets them for the sake of genericity)\n\n      if (material instanceof THREE.ShaderMaterial ||\n      material instanceof THREE.MeshPhongMaterial ||\n      material.envMap) {\n\n        if (p_uniforms.cameraPosition !== null) {\n\n          _vector3.setFromMatrixPosition(camera.matrixWorld);\n          _gl.uniform3f(p_uniforms.cameraPosition, _vector3.x, _vector3.y, _vector3.z);\n\n        }\n\n      }\n\n      if (material instanceof THREE.MeshPhongMaterial ||\n      material instanceof THREE.MeshLambertMaterial ||\n      material instanceof THREE.MeshBasicMaterial ||\n      material instanceof THREE.ShaderMaterial ||\n      material.skinning) {\n\n        if (p_uniforms.viewMatrix !== null) {\n\n          _gl.uniformMatrix4fv(p_uniforms.viewMatrix, false, camera.matrixWorldInverse.elements);\n\n        }\n\n      }\n\n    }\n\n    // skinning uniforms must be set even if material didn't change\n    // auto-setting of texture unit for bone texture must go before other textures\n    // not sure why, but otherwise weird things happen\n\n    if (material.skinning) {\n\n      if (object.bindMatrix && p_uniforms.bindMatrix !== null) {\n\n        _gl.uniformMatrix4fv(p_uniforms.bindMatrix, false, object.bindMatrix.elements);\n\n      }\n\n      if (object.bindMatrixInverse && p_uniforms.bindMatrixInverse !== null) {\n\n        _gl.uniformMatrix4fv(p_uniforms.bindMatrixInverse, false, object.bindMatrixInverse.elements);\n\n      }\n\n      if (_supportsBoneTextures && object.skeleton && object.skeleton.useVertexTexture) {\n\n        if (p_uniforms.boneTexture !== null) {\n\n          var textureUnit = getTextureUnit();\n\n          _gl.uniform1i(p_uniforms.boneTexture, textureUnit);\n          _this.setTexture(object.skeleton.boneTexture, textureUnit);\n\n        }\n\n        if (p_uniforms.boneTextureWidth !== null) {\n\n          _gl.uniform1i(p_uniforms.boneTextureWidth, object.skeleton.boneTextureWidth);\n\n        }\n\n        if (p_uniforms.boneTextureHeight !== null) {\n\n          _gl.uniform1i(p_uniforms.boneTextureHeight, object.skeleton.boneTextureHeight);\n\n        }\n\n      } else if (object.skeleton && object.skeleton.boneMatrices) {\n\n        if (p_uniforms.boneGlobalMatrices !== null) {\n\n          _gl.uniformMatrix4fv(p_uniforms.boneGlobalMatrices, false, object.skeleton.boneMatrices);\n\n        }\n\n      }\n\n    }\n\n    if (refreshMaterial) {\n\n      // refresh uniforms common to several materials\n\n      if (fog && material.fog) {\n\n        refreshUniformsFog(m_uniforms, fog);\n\n      }\n\n      if (material instanceof THREE.MeshPhongMaterial ||\n      material instanceof THREE.MeshLambertMaterial ||\n      material.lights) {\n\n        if (_lightsNeedUpdate) {\n\n          refreshLights = true;\n          setupLights(lights);\n          _lightsNeedUpdate = false;\n        }\n\n        if (refreshLights) {\n          refreshUniformsLights(m_uniforms, _lights);\n          markUniformsLightsNeedsUpdate(m_uniforms, true);\n        } else {\n          markUniformsLightsNeedsUpdate(m_uniforms, false);\n        }\n\n      }\n\n      if (material instanceof THREE.MeshBasicMaterial ||\n      material instanceof THREE.MeshLambertMaterial ||\n      material instanceof THREE.MeshPhongMaterial) {\n\n        refreshUniformsCommon(m_uniforms, material);\n\n      }\n\n      // refresh single material specific uniforms\n\n      if (material instanceof THREE.LineBasicMaterial) {\n\n        refreshUniformsLine(m_uniforms, material);\n\n      } else if (material instanceof THREE.LineDashedMaterial) {\n\n        refreshUniformsLine(m_uniforms, material);\n        refreshUniformsDash(m_uniforms, material);\n\n      } else if (material instanceof THREE.PointCloudMaterial) {\n\n        refreshUniformsParticle(m_uniforms, material);\n\n      } else if (material instanceof THREE.MeshPhongMaterial) {\n\n        refreshUniformsPhong(m_uniforms, material);\n\n      } else if (material instanceof THREE.MeshLambertMaterial) {\n\n        refreshUniformsLambert(m_uniforms, material);\n\n      } else if (material instanceof THREE.MeshDepthMaterial) {\n\n        m_uniforms.mNear.value = camera.near;\n        m_uniforms.mFar.value = camera.far;\n        m_uniforms.opacity.value = material.opacity;\n\n      } else if (material instanceof THREE.MeshNormalMaterial) {\n\n        m_uniforms.opacity.value = material.opacity;\n\n      }\n\n      if (object.receiveShadow && !material._shadowPass) {\n\n        refreshUniformsShadow(m_uniforms, lights);\n\n      }\n\n      // load common uniforms\n\n      loadUniformsGeneric(material.uniformsList);\n\n    }\n\n    loadUniformsMatrices(p_uniforms, object);\n\n    if (p_uniforms.modelMatrix !== null) {\n\n      _gl.uniformMatrix4fv(p_uniforms.modelMatrix, false, object.matrixWorld.elements);\n\n    }\n\n    return program;\n\n  }\n\n  // Uniforms (refresh uniforms objects)\n\n  function refreshUniformsCommon(uniforms, material) {\n\n    uniforms.opacity.value = material.opacity;\n\n    uniforms.diffuse.value = material.color;\n\n    uniforms.map.value = material.map;\n    uniforms.lightMap.value = material.lightMap;\n    uniforms.specularMap.value = material.specularMap;\n    uniforms.alphaMap.value = material.alphaMap;\n\n    if (material.bumpMap) {\n\n      uniforms.bumpMap.value = material.bumpMap;\n      uniforms.bumpScale.value = material.bumpScale;\n\n    }\n\n    if (material.normalMap) {\n\n      uniforms.normalMap.value = material.normalMap;\n      uniforms.normalScale.value.copy(material.normalScale);\n\n    }\n\n    // uv repeat and offset setting priorities\n    //  1. color map\n    //  2. specular map\n    //  3. normal map\n    //  4. bump map\n    //  5. alpha map\n\n    var uvScaleMap;\n\n    if (material.map) {\n\n      uvScaleMap = material.map;\n\n    } else if (material.specularMap) {\n\n      uvScaleMap = material.specularMap;\n\n    } else if (material.normalMap) {\n\n      uvScaleMap = material.normalMap;\n\n    } else if (material.bumpMap) {\n\n      uvScaleMap = material.bumpMap;\n\n    } else if (material.alphaMap) {\n\n      uvScaleMap = material.alphaMap;\n\n    }\n\n    if (uvScaleMap !== undefined) {\n\n      var offset = uvScaleMap.offset;\n      var repeat = uvScaleMap.repeat;\n\n      uniforms.offsetRepeat.value.set(offset.x, offset.y, repeat.x, repeat.y);\n\n    }\n\n    uniforms.envMap.value = material.envMap;\n    uniforms.flipEnvMap.value = material.envMap instanceof THREE.WebGLRenderTargetCube ? 1 : -1;\n\n    uniforms.reflectivity.value = material.reflectivity;\n    uniforms.refractionRatio.value = material.refractionRatio;\n\n  }\n\n  function refreshUniformsLine(uniforms, material) {\n\n    uniforms.diffuse.value = material.color;\n    uniforms.opacity.value = material.opacity;\n\n  }\n\n  function refreshUniformsDash(uniforms, material) {\n\n    uniforms.dashSize.value = material.dashSize;\n    uniforms.totalSize.value = material.dashSize + material.gapSize;\n    uniforms.scale.value = material.scale;\n\n  }\n\n  function refreshUniformsParticle(uniforms, material) {\n\n    uniforms.psColor.value = material.color;\n    uniforms.opacity.value = material.opacity;\n    uniforms.size.value = material.size;\n    uniforms.scale.value = _canvas.height / 2.0; // TODO: Cache this.\n\n    uniforms.map.value = material.map;\n\n    if (material.map !== null) {\n\n      var offset = material.map.offset;\n      var repeat = material.map.repeat;\n\n      uniforms.offsetRepeat.value.set(offset.x, offset.y, repeat.x, repeat.y);\n\n    }\n\n  }\n\n  function refreshUniformsFog(uniforms, fog) {\n\n    uniforms.fogColor.value = fog.color;\n\n    if (fog instanceof THREE.Fog) {\n\n      uniforms.fogNear.value = fog.near;\n      uniforms.fogFar.value = fog.far;\n\n    } else if (fog instanceof THREE.FogExp2) {\n\n      uniforms.fogDensity.value = fog.density;\n\n    }\n\n  }\n\n  function refreshUniformsPhong(uniforms, material) {\n\n    uniforms.shininess.value = material.shininess;\n\n    uniforms.emissive.value = material.emissive;\n    uniforms.specular.value = material.specular;\n\n    if (material.wrapAround) {\n\n      uniforms.wrapRGB.value.copy(material.wrapRGB);\n\n    }\n\n  }\n\n  function refreshUniformsLambert(uniforms, material) {\n\n    uniforms.emissive.value = material.emissive;\n\n    if (material.wrapAround) {\n\n      uniforms.wrapRGB.value.copy(material.wrapRGB);\n\n    }\n\n  }\n\n  function refreshUniformsLights(uniforms, lights) {\n\n    uniforms.ambientLightColor.value = lights.ambient;\n\n    uniforms.directionalLightColor.value = lights.directional.colors;\n    uniforms.directionalLightDirection.value = lights.directional.positions;\n\n    uniforms.pointLightColor.value = lights.point.colors;\n    uniforms.pointLightPosition.value = lights.point.positions;\n    uniforms.pointLightDistance.value = lights.point.distances;\n    uniforms.pointLightDecay.value = lights.point.decays;\n\n    uniforms.spotLightColor.value = lights.spot.colors;\n    uniforms.spotLightPosition.value = lights.spot.positions;\n    uniforms.spotLightDistance.value = lights.spot.distances;\n    uniforms.spotLightDirection.value = lights.spot.directions;\n    uniforms.spotLightAngleCos.value = lights.spot.anglesCos;\n    uniforms.spotLightExponent.value = lights.spot.exponents;\n    uniforms.spotLightDecay.value = lights.spot.decays;\n\n    uniforms.hemisphereLightSkyColor.value = lights.hemi.skyColors;\n    uniforms.hemisphereLightGroundColor.value = lights.hemi.groundColors;\n    uniforms.hemisphereLightDirection.value = lights.hemi.positions;\n\n  }\n\n  // If uniforms are marked as clean, they don't need to be loaded to the GPU.\n\n  function markUniformsLightsNeedsUpdate(uniforms, value) {\n\n    uniforms.ambientLightColor.needsUpdate = value;\n\n    uniforms.directionalLightColor.needsUpdate = value;\n    uniforms.directionalLightDirection.needsUpdate = value;\n\n    uniforms.pointLightColor.needsUpdate = value;\n    uniforms.pointLightPosition.needsUpdate = value;\n    uniforms.pointLightDistance.needsUpdate = value;\n    uniforms.pointLightDecay.needsUpdate = value;\n\n    uniforms.spotLightColor.needsUpdate = value;\n    uniforms.spotLightPosition.needsUpdate = value;\n    uniforms.spotLightDistance.needsUpdate = value;\n    uniforms.spotLightDirection.needsUpdate = value;\n    uniforms.spotLightAngleCos.needsUpdate = value;\n    uniforms.spotLightExponent.needsUpdate = value;\n    uniforms.spotLightDecay.needsUpdate = value;\n\n    uniforms.hemisphereLightSkyColor.needsUpdate = value;\n    uniforms.hemisphereLightGroundColor.needsUpdate = value;\n    uniforms.hemisphereLightDirection.needsUpdate = value;\n\n  }\n\n  function refreshUniformsShadow(uniforms, lights) {\n\n    if (uniforms.shadowMatrix) {\n\n      var j = 0;\n\n      for (var i = 0, il = lights.length; i < il; i++) {\n\n        var light = lights[i];\n\n        if (!light.castShadow) continue;\n\n        if (light instanceof THREE.SpotLight || light instanceof THREE.DirectionalLight && !light.shadowCascade) {\n\n          uniforms.shadowMap.value[j] = light.shadowMap;\n          uniforms.shadowMapSize.value[j] = light.shadowMapSize;\n\n          uniforms.shadowMatrix.value[j] = light.shadowMatrix;\n\n          uniforms.shadowDarkness.value[j] = light.shadowDarkness;\n          uniforms.shadowBias.value[j] = light.shadowBias;\n\n          j++;\n\n        }\n\n      }\n\n    }\n\n  }\n\n  // Uniforms (load to GPU)\n\n  function loadUniformsMatrices(uniforms, object) {\n\n    _gl.uniformMatrix4fv(uniforms.modelViewMatrix, false, object._modelViewMatrix.elements);\n\n    if (uniforms.normalMatrix) {\n\n      _gl.uniformMatrix3fv(uniforms.normalMatrix, false, object._normalMatrix.elements);\n\n    }\n\n  }\n\n  function getTextureUnit() {\n\n    var textureUnit = _usedTextureUnits;\n\n    if (textureUnit >= _maxTextures) {\n\n      THREE.warn('WebGLRenderer: trying to use ' + textureUnit + ' texture units while this GPU supports only ' + _maxTextures);\n\n    }\n\n    _usedTextureUnits += 1;\n\n    return textureUnit;\n\n  }\n\n  function loadUniformsGeneric(uniforms) {\n\n    var texture, textureUnit, offset;\n\n    for (var j = 0, jl = uniforms.length; j < jl; j++) {\n\n      var uniform = uniforms[j][0];\n\n      // needsUpdate property is not added to all uniforms.\n      if (uniform.needsUpdate === false) continue;\n\n      var type = uniform.type;\n      var value = uniform.value;\n      var location = uniforms[j][1];\n\n      switch (type) {\n\n        case '1i':\n          _gl.uniform1i(location, value);\n          break;\n\n        case '1f':\n          _gl.uniform1f(location, value);\n          break;\n\n        case '2f':\n          _gl.uniform2f(location, value[0], value[1]);\n          break;\n\n        case '3f':\n          _gl.uniform3f(location, value[0], value[1], value[2]);\n          break;\n\n        case '4f':\n          _gl.uniform4f(location, value[0], value[1], value[2], value[3]);\n          break;\n\n        case '1iv':\n          _gl.uniform1iv(location, value);\n          break;\n\n        case '3iv':\n          _gl.uniform3iv(location, value);\n          break;\n\n        case '1fv':\n          _gl.uniform1fv(location, value);\n          break;\n\n        case '2fv':\n          _gl.uniform2fv(location, value);\n          break;\n\n        case '3fv':\n          _gl.uniform3fv(location, value);\n          break;\n\n        case '4fv':\n          _gl.uniform4fv(location, value);\n          break;\n\n        case 'Matrix3fv':\n          _gl.uniformMatrix3fv(location, false, value);\n          break;\n\n        case 'Matrix4fv':\n          _gl.uniformMatrix4fv(location, false, value);\n          break;\n\n        //\n\n        case 'i':\n\n          // single integer\n          _gl.uniform1i(location, value);\n\n          break;\n\n        case 'f':\n\n          // single float\n          _gl.uniform1f(location, value);\n\n          break;\n\n        case 'v2':\n\n          // single THREE.Vector2\n          _gl.uniform2f(location, value.x, value.y);\n\n          break;\n\n        case 'v3':\n\n          // single THREE.Vector3\n          _gl.uniform3f(location, value.x, value.y, value.z);\n\n          break;\n\n        case 'v4':\n\n          // single THREE.Vector4\n          _gl.uniform4f(location, value.x, value.y, value.z, value.w);\n\n          break;\n\n        case 'c':\n\n          // single THREE.Color\n          _gl.uniform3f(location, value.r, value.g, value.b);\n\n          break;\n\n        case 'iv1':\n\n          // flat array of integers (JS or typed array)\n          _gl.uniform1iv(location, value);\n\n          break;\n\n        case 'iv':\n\n          // flat array of integers with 3 x N size (JS or typed array)\n          _gl.uniform3iv(location, value);\n\n          break;\n\n        case 'fv1':\n\n          // flat array of floats (JS or typed array)\n          _gl.uniform1fv(location, value);\n\n          break;\n\n        case 'fv':\n\n          // flat array of floats with 3 x N size (JS or typed array)\n          _gl.uniform3fv(location, value);\n\n          break;\n\n        case 'v2v':\n\n          // array of THREE.Vector2\n\n          if (uniform._array === undefined) {\n\n            uniform._array = new Float32Array(2 * value.length);\n\n          }\n\n          for (var i = 0, il = value.length; i < il; i++) {\n\n            offset = i * 2;\n\n            uniform._array[offset] = value[i].x;\n            uniform._array[offset + 1] = value[i].y;\n\n          }\n\n          _gl.uniform2fv(location, uniform._array);\n\n          break;\n\n        case 'v3v':\n\n          // array of THREE.Vector3\n\n          if (uniform._array === undefined) {\n\n            uniform._array = new Float32Array(3 * value.length);\n\n          }\n\n          for (var i = 0, il = value.length; i < il; i++) {\n\n            offset = i * 3;\n\n            uniform._array[offset] = value[i].x;\n            uniform._array[offset + 1] = value[i].y;\n            uniform._array[offset + 2] = value[i].z;\n\n          }\n\n          _gl.uniform3fv(location, uniform._array);\n\n          break;\n\n        case 'v4v':\n\n          // array of THREE.Vector4\n\n          if (uniform._array === undefined) {\n\n            uniform._array = new Float32Array(4 * value.length);\n\n          }\n\n          for (var i = 0, il = value.length; i < il; i++) {\n\n            offset = i * 4;\n\n            uniform._array[offset] = value[i].x;\n            uniform._array[offset + 1] = value[i].y;\n            uniform._array[offset + 2] = value[i].z;\n            uniform._array[offset + 3] = value[i].w;\n\n          }\n\n          _gl.uniform4fv(location, uniform._array);\n\n          break;\n\n        case 'm3':\n\n          // single THREE.Matrix3\n          _gl.uniformMatrix3fv(location, false, value.elements);\n\n          break;\n\n        case 'm3v':\n\n          // array of THREE.Matrix3\n\n          if (uniform._array === undefined) {\n\n            uniform._array = new Float32Array(9 * value.length);\n\n          }\n\n          for (var i = 0, il = value.length; i < il; i++) {\n\n            value[i].flattenToArrayOffset(uniform._array, i * 9);\n\n          }\n\n          _gl.uniformMatrix3fv(location, false, uniform._array);\n\n          break;\n\n        case 'm4':\n\n          // single THREE.Matrix4\n          _gl.uniformMatrix4fv(location, false, value.elements);\n\n          break;\n\n        case 'm4v':\n\n          // array of THREE.Matrix4\n\n          if (uniform._array === undefined) {\n\n            uniform._array = new Float32Array(16 * value.length);\n\n          }\n\n          for (var i = 0, il = value.length; i < il; i++) {\n\n            value[i].flattenToArrayOffset(uniform._array, i * 16);\n\n          }\n\n          _gl.uniformMatrix4fv(location, false, uniform._array);\n\n          break;\n\n        case 't':\n\n          // single THREE.Texture (2d or cube)\n\n          texture = value;\n          textureUnit = getTextureUnit();\n\n          _gl.uniform1i(location, textureUnit);\n\n          if (!texture) continue;\n\n          if (texture instanceof THREE.CubeTexture ||\n          texture.image instanceof Array && texture.image.length === 6) {// CompressedTexture can have Array in image :/\n\n            setCubeTexture(texture, textureUnit);\n\n          } else if (texture instanceof THREE.WebGLRenderTargetCube) {\n\n            setCubeTextureDynamic(texture, textureUnit);\n\n          } else {\n\n            _this.setTexture(texture, textureUnit);\n\n          }\n\n          break;\n\n        case 'tv':\n\n          // array of THREE.Texture (2d)\n\n          if (uniform._array === undefined) {\n\n            uniform._array = [];\n\n          }\n\n          for (var i = 0, il = uniform.value.length; i < il; i++) {\n\n            uniform._array[i] = getTextureUnit();\n\n          }\n\n          _gl.uniform1iv(location, uniform._array);\n\n          for (var i = 0, il = uniform.value.length; i < il; i++) {\n\n            texture = uniform.value[i];\n            textureUnit = uniform._array[i];\n\n            if (!texture) continue;\n\n            _this.setTexture(texture, textureUnit);\n\n          }\n\n          break;\n\n        default:\n\n          THREE.warn('THREE.WebGLRenderer: Unknown uniform type: ' + type);}\n\n\n\n    }\n\n  }\n\n  function setupMatrices(object, camera) {\n\n    object._modelViewMatrix.multiplyMatrices(camera.matrixWorldInverse, object.matrixWorld);\n    object._normalMatrix.getNormalMatrix(object._modelViewMatrix);\n\n  }\n\n  function setColorLinear(array, offset, color, intensity) {\n\n    array[offset] = color.r * intensity;\n    array[offset + 1] = color.g * intensity;\n    array[offset + 2] = color.b * intensity;\n\n  }\n\n  function setupLights(lights) {\n\n    var l,ll,light,\n    r = 0,g = 0,b = 0,\n    color,skyColor,groundColor,\n    intensity,\n    distance,\n\n    zlights = _lights,\n\n    dirColors = zlights.directional.colors,\n    dirPositions = zlights.directional.positions,\n\n    pointColors = zlights.point.colors,\n    pointPositions = zlights.point.positions,\n    pointDistances = zlights.point.distances,\n    pointDecays = zlights.point.decays,\n\n    spotColors = zlights.spot.colors,\n    spotPositions = zlights.spot.positions,\n    spotDistances = zlights.spot.distances,\n    spotDirections = zlights.spot.directions,\n    spotAnglesCos = zlights.spot.anglesCos,\n    spotExponents = zlights.spot.exponents,\n    spotDecays = zlights.spot.decays,\n\n    hemiSkyColors = zlights.hemi.skyColors,\n    hemiGroundColors = zlights.hemi.groundColors,\n    hemiPositions = zlights.hemi.positions,\n\n    dirLength = 0,\n    pointLength = 0,\n    spotLength = 0,\n    hemiLength = 0,\n\n    dirCount = 0,\n    pointCount = 0,\n    spotCount = 0,\n    hemiCount = 0,\n\n    dirOffset = 0,\n    pointOffset = 0,\n    spotOffset = 0,\n    hemiOffset = 0;\n\n    for (l = 0, ll = lights.length; l < ll; l++) {\n\n      light = lights[l];\n\n      if (light.onlyShadow) continue;\n\n      color = light.color;\n      intensity = light.intensity;\n      distance = light.distance;\n\n      if (light instanceof THREE.AmbientLight) {\n\n        if (!light.visible) continue;\n\n        r += color.r;\n        g += color.g;\n        b += color.b;\n\n      } else if (light instanceof THREE.DirectionalLight) {\n\n        dirCount += 1;\n\n        if (!light.visible) continue;\n\n        _direction.setFromMatrixPosition(light.matrixWorld);\n        _vector3.setFromMatrixPosition(light.target.matrixWorld);\n        _direction.sub(_vector3);\n        _direction.normalize();\n\n        dirOffset = dirLength * 3;\n\n        dirPositions[dirOffset] = _direction.x;\n        dirPositions[dirOffset + 1] = _direction.y;\n        dirPositions[dirOffset + 2] = _direction.z;\n\n        setColorLinear(dirColors, dirOffset, color, intensity);\n\n        dirLength += 1;\n\n      } else if (light instanceof THREE.PointLight) {\n\n        pointCount += 1;\n\n        if (!light.visible) continue;\n\n        pointOffset = pointLength * 3;\n\n        setColorLinear(pointColors, pointOffset, color, intensity);\n\n        _vector3.setFromMatrixPosition(light.matrixWorld);\n\n        pointPositions[pointOffset] = _vector3.x;\n        pointPositions[pointOffset + 1] = _vector3.y;\n        pointPositions[pointOffset + 2] = _vector3.z;\n\n        // distance is 0 if decay is 0, because there is no attenuation at all.\n        pointDistances[pointLength] = distance;\n        pointDecays[pointLength] = light.distance === 0 ? 0.0 : light.decay;\n\n        pointLength += 1;\n\n      } else if (light instanceof THREE.SpotLight) {\n\n        spotCount += 1;\n\n        if (!light.visible) continue;\n\n        spotOffset = spotLength * 3;\n\n        setColorLinear(spotColors, spotOffset, color, intensity);\n\n        _direction.setFromMatrixPosition(light.matrixWorld);\n\n        spotPositions[spotOffset] = _direction.x;\n        spotPositions[spotOffset + 1] = _direction.y;\n        spotPositions[spotOffset + 2] = _direction.z;\n\n        spotDistances[spotLength] = distance;\n\n        _vector3.setFromMatrixPosition(light.target.matrixWorld);\n        _direction.sub(_vector3);\n        _direction.normalize();\n\n        spotDirections[spotOffset] = _direction.x;\n        spotDirections[spotOffset + 1] = _direction.y;\n        spotDirections[spotOffset + 2] = _direction.z;\n\n        spotAnglesCos[spotLength] = Math.cos(light.angle);\n        spotExponents[spotLength] = light.exponent;\n        spotDecays[spotLength] = light.distance === 0 ? 0.0 : light.decay;\n\n        spotLength += 1;\n\n      } else if (light instanceof THREE.HemisphereLight) {\n\n        hemiCount += 1;\n\n        if (!light.visible) continue;\n\n        _direction.setFromMatrixPosition(light.matrixWorld);\n        _direction.normalize();\n\n        hemiOffset = hemiLength * 3;\n\n        hemiPositions[hemiOffset] = _direction.x;\n        hemiPositions[hemiOffset + 1] = _direction.y;\n        hemiPositions[hemiOffset + 2] = _direction.z;\n\n        skyColor = light.color;\n        groundColor = light.groundColor;\n\n        setColorLinear(hemiSkyColors, hemiOffset, skyColor, intensity);\n        setColorLinear(hemiGroundColors, hemiOffset, groundColor, intensity);\n\n        hemiLength += 1;\n\n      }\n\n    }\n\n    // null eventual remains from removed lights\n    // (this is to avoid if in shader)\n\n    for (l = dirLength * 3, ll = Math.max(dirColors.length, dirCount * 3); l < ll; l++) {dirColors[l] = 0.0;}\n    for (l = pointLength * 3, ll = Math.max(pointColors.length, pointCount * 3); l < ll; l++) {pointColors[l] = 0.0;}\n    for (l = spotLength * 3, ll = Math.max(spotColors.length, spotCount * 3); l < ll; l++) {spotColors[l] = 0.0;}\n    for (l = hemiLength * 3, ll = Math.max(hemiSkyColors.length, hemiCount * 3); l < ll; l++) {hemiSkyColors[l] = 0.0;}\n    for (l = hemiLength * 3, ll = Math.max(hemiGroundColors.length, hemiCount * 3); l < ll; l++) {hemiGroundColors[l] = 0.0;}\n\n    zlights.directional.length = dirLength;\n    zlights.point.length = pointLength;\n    zlights.spot.length = spotLength;\n    zlights.hemi.length = hemiLength;\n\n    zlights.ambient[0] = r;\n    zlights.ambient[1] = g;\n    zlights.ambient[2] = b;\n\n  }\n\n  // GL state setting\n\n  this.setFaceCulling = function (cullFace, frontFaceDirection) {\n\n    if (cullFace === THREE.CullFaceNone) {\n\n      _gl.disable(_gl.CULL_FACE);\n\n    } else {\n\n      if (frontFaceDirection === THREE.FrontFaceDirectionCW) {\n\n        _gl.frontFace(_gl.CW);\n\n      } else {\n\n        _gl.frontFace(_gl.CCW);\n\n      }\n\n      if (cullFace === THREE.CullFaceBack) {\n\n        _gl.cullFace(_gl.BACK);\n\n      } else if (cullFace === THREE.CullFaceFront) {\n\n        _gl.cullFace(_gl.FRONT);\n\n      } else {\n\n        _gl.cullFace(_gl.FRONT_AND_BACK);\n\n      }\n\n      _gl.enable(_gl.CULL_FACE);\n\n    }\n\n  };\n\n  this.setMaterialFaces = function (material) {\n\n    state.setDoubleSided(material.side === THREE.DoubleSide);\n    state.setFlipSided(material.side === THREE.BackSide);\n\n  };\n\n  // Textures\n\n  function setTextureParameters(textureType, texture, isImagePowerOfTwo) {\n\n    var extension;\n\n    if (isImagePowerOfTwo) {\n\n      _gl.texParameteri(textureType, _gl.TEXTURE_WRAP_S, paramThreeToGL(texture.wrapS));\n      _gl.texParameteri(textureType, _gl.TEXTURE_WRAP_T, paramThreeToGL(texture.wrapT));\n\n      _gl.texParameteri(textureType, _gl.TEXTURE_MAG_FILTER, paramThreeToGL(texture.magFilter));\n      _gl.texParameteri(textureType, _gl.TEXTURE_MIN_FILTER, paramThreeToGL(texture.minFilter));\n\n    } else {\n\n      _gl.texParameteri(textureType, _gl.TEXTURE_WRAP_S, _gl.CLAMP_TO_EDGE);\n      _gl.texParameteri(textureType, _gl.TEXTURE_WRAP_T, _gl.CLAMP_TO_EDGE);\n\n      if (texture.wrapS !== THREE.ClampToEdgeWrapping || texture.wrapT !== THREE.ClampToEdgeWrapping) {\n\n        THREE.warn('THREE.WebGLRenderer: Texture is not power of two. Texture.wrapS and Texture.wrapT should be set to THREE.ClampToEdgeWrapping. ( ' + texture.sourceFile + ' )');\n\n      }\n\n      _gl.texParameteri(textureType, _gl.TEXTURE_MAG_FILTER, filterFallback(texture.magFilter));\n      _gl.texParameteri(textureType, _gl.TEXTURE_MIN_FILTER, filterFallback(texture.minFilter));\n\n      if (texture.minFilter !== THREE.NearestFilter && texture.minFilter !== THREE.LinearFilter) {\n\n        THREE.warn('THREE.WebGLRenderer: Texture is not power of two. Texture.minFilter should be set to THREE.NearestFilter or THREE.LinearFilter. ( ' + texture.sourceFile + ' )');\n\n      }\n\n    }\n\n    extension = extensions.get('EXT_texture_filter_anisotropic');\n\n    if (extension && texture.type !== THREE.FloatType && texture.type !== THREE.HalfFloatType) {\n\n      if (texture.anisotropy > 1 || texture.__currentAnisotropy) {\n\n        _gl.texParameterf(textureType, extension.TEXTURE_MAX_ANISOTROPY_EXT, Math.min(texture.anisotropy, _this.getMaxAnisotropy()));\n        texture.__currentAnisotropy = texture.anisotropy;\n\n      }\n\n    }\n\n  }\n\n  this.uploadTexture = function (texture) {\n\n    if (texture.__webglInit === undefined) {\n\n      texture.__webglInit = true;\n\n      texture.addEventListener('dispose', onTextureDispose);\n\n      texture.__webglTexture = _gl.createTexture();\n\n      _this.info.memory.textures++;\n\n    }\n\n    _gl.bindTexture(_gl.TEXTURE_2D, texture.__webglTexture);\n\n    _gl.pixelStorei(_gl.UNPACK_FLIP_Y_WEBGL, texture.flipY);\n    _gl.pixelStorei(_gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, texture.premultiplyAlpha);\n    _gl.pixelStorei(_gl.UNPACK_ALIGNMENT, texture.unpackAlignment);\n\n    texture.image = clampToMaxSize(texture.image, _maxTextureSize);\n\n    var image = texture.image,\n    isImagePowerOfTwo = THREE.Math.isPowerOfTwo(image.width) && THREE.Math.isPowerOfTwo(image.height),\n    glFormat = paramThreeToGL(texture.format),\n    glType = paramThreeToGL(texture.type);\n\n    setTextureParameters(_gl.TEXTURE_2D, texture, isImagePowerOfTwo);\n\n    var mipmap,mipmaps = texture.mipmaps;\n\n    if (texture instanceof THREE.DataTexture) {\n\n      // use manually created mipmaps if available\n      // if there are no manual mipmaps\n      // set 0 level mipmap and then use GL to generate other mipmap levels\n\n      if (mipmaps.length > 0 && isImagePowerOfTwo) {\n\n        for (var i = 0, il = mipmaps.length; i < il; i++) {\n\n          mipmap = mipmaps[i];\n          _gl.texImage2D(_gl.TEXTURE_2D, i, glFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data);\n\n        }\n\n        texture.generateMipmaps = false;\n\n      } else {\n\n        _gl.texImage2D(_gl.TEXTURE_2D, 0, glFormat, image.width, image.height, 0, glFormat, glType, image.data);\n\n      }\n\n    } else if (texture instanceof THREE.CompressedTexture) {\n\n      for (var i = 0, il = mipmaps.length; i < il; i++) {\n\n        mipmap = mipmaps[i];\n\n        if (texture.format !== THREE.RGBAFormat && texture.format !== THREE.RGBFormat) {\n\n          if (getCompressedTextureFormats().indexOf(glFormat) > -1) {\n\n            _gl.compressedTexImage2D(_gl.TEXTURE_2D, i, glFormat, mipmap.width, mipmap.height, 0, mipmap.data);\n\n          } else {\n\n            THREE.warn(\"THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .uploadTexture()\");\n\n          }\n\n        } else {\n\n          _gl.texImage2D(_gl.TEXTURE_2D, i, glFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data);\n\n        }\n\n      }\n\n    } else {// regular Texture (image, video, canvas)\n\n      // use manually created mipmaps if available\n      // if there are no manual mipmaps\n      // set 0 level mipmap and then use GL to generate other mipmap levels\n\n      if (mipmaps.length > 0 && isImagePowerOfTwo) {\n\n        for (var i = 0, il = mipmaps.length; i < il; i++) {\n\n          mipmap = mipmaps[i];\n          _gl.texImage2D(_gl.TEXTURE_2D, i, glFormat, glFormat, glType, mipmap);\n\n        }\n\n        texture.generateMipmaps = false;\n\n      } else {\n\n        _gl.texImage2D(_gl.TEXTURE_2D, 0, glFormat, glFormat, glType, texture.image);\n\n      }\n\n    }\n\n    if (texture.generateMipmaps && isImagePowerOfTwo) _gl.generateMipmap(_gl.TEXTURE_2D);\n\n    texture.needsUpdate = false;\n\n    if (texture.onUpdate) texture.onUpdate();\n\n  };\n\n  this.setTexture = function (texture, slot) {\n\n    _gl.activeTexture(_gl.TEXTURE0 + slot);\n\n    if (texture.needsUpdate) {\n\n      _this.uploadTexture(texture);\n\n    } else {\n\n      _gl.bindTexture(_gl.TEXTURE_2D, texture.__webglTexture);\n\n    }\n\n  };\n\n  function clampToMaxSize(image, maxSize) {\n\n    if (image.width > maxSize || image.height > maxSize) {\n\n      // Warning: Scaling through the canvas will only work with images that use\n      // premultiplied alpha.\n\n      var scale = maxSize / Math.max(image.width, image.height);\n\n      var canvas = document.createElement('canvas');\n      canvas.width = Math.floor(image.width * scale);\n      canvas.height = Math.floor(image.height * scale);\n\n      var context = canvas.getContext('2d');\n      context.drawImage(image, 0, 0, image.width, image.height, 0, 0, canvas.width, canvas.height);\n\n      THREE.warn('THREE.WebGLRenderer: image is too big (' + image.width + 'x' + image.height + '). Resized to ' + canvas.width + 'x' + canvas.height, image);\n\n      return canvas;\n\n    }\n\n    return image;\n\n  }\n\n  function setCubeTexture(texture, slot) {\n\n    if (texture.image.length === 6) {\n\n      if (texture.needsUpdate) {\n\n        if (!texture.image.__webglTextureCube) {\n\n          texture.addEventListener('dispose', onTextureDispose);\n\n          texture.image.__webglTextureCube = _gl.createTexture();\n\n          _this.info.memory.textures++;\n\n        }\n\n        _gl.activeTexture(_gl.TEXTURE0 + slot);\n        _gl.bindTexture(_gl.TEXTURE_CUBE_MAP, texture.image.__webglTextureCube);\n\n        _gl.pixelStorei(_gl.UNPACK_FLIP_Y_WEBGL, texture.flipY);\n\n        var isCompressed = texture instanceof THREE.CompressedTexture;\n        var isDataTexture = texture.image[0] instanceof THREE.DataTexture;\n\n        var cubeImage = [];\n\n        for (var i = 0; i < 6; i++) {\n\n          if (_this.autoScaleCubemaps && !isCompressed && !isDataTexture) {\n\n            cubeImage[i] = clampToMaxSize(texture.image[i], _maxCubemapSize);\n\n          } else {\n\n            cubeImage[i] = isDataTexture ? texture.image[i].image : texture.image[i];\n\n          }\n\n        }\n\n        var image = cubeImage[0],\n        isImagePowerOfTwo = THREE.Math.isPowerOfTwo(image.width) && THREE.Math.isPowerOfTwo(image.height),\n        glFormat = paramThreeToGL(texture.format),\n        glType = paramThreeToGL(texture.type);\n\n        setTextureParameters(_gl.TEXTURE_CUBE_MAP, texture, isImagePowerOfTwo);\n\n        for (var i = 0; i < 6; i++) {\n\n          if (!isCompressed) {\n\n            if (isDataTexture) {\n\n              _gl.texImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, glFormat, cubeImage[i].width, cubeImage[i].height, 0, glFormat, glType, cubeImage[i].data);\n\n            } else {\n\n              _gl.texImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, glFormat, glFormat, glType, cubeImage[i]);\n\n            }\n\n          } else {\n\n            var mipmap,mipmaps = cubeImage[i].mipmaps;\n\n            for (var j = 0, jl = mipmaps.length; j < jl; j++) {\n\n              mipmap = mipmaps[j];\n\n              if (texture.format !== THREE.RGBAFormat && texture.format !== THREE.RGBFormat) {\n\n                if (getCompressedTextureFormats().indexOf(glFormat) > -1) {\n\n                  _gl.compressedTexImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j, glFormat, mipmap.width, mipmap.height, 0, mipmap.data);\n\n                } else {\n\n                  THREE.warn(\"THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .setCubeTexture()\");\n\n                }\n\n              } else {\n\n                _gl.texImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j, glFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data);\n\n              }\n\n            }\n\n          }\n\n        }\n\n        if (texture.generateMipmaps && isImagePowerOfTwo) {\n\n          _gl.generateMipmap(_gl.TEXTURE_CUBE_MAP);\n\n        }\n\n        texture.needsUpdate = false;\n\n        if (texture.onUpdate) texture.onUpdate();\n\n      } else {\n\n        _gl.activeTexture(_gl.TEXTURE0 + slot);\n        _gl.bindTexture(_gl.TEXTURE_CUBE_MAP, texture.image.__webglTextureCube);\n\n      }\n\n    }\n\n  }\n\n  function setCubeTextureDynamic(texture, slot) {\n\n    _gl.activeTexture(_gl.TEXTURE0 + slot);\n    _gl.bindTexture(_gl.TEXTURE_CUBE_MAP, texture.__webglTexture);\n\n  }\n\n  // Render targets\n\n  function setupFrameBuffer(framebuffer, renderTarget, textureTarget) {\n\n    _gl.bindFramebuffer(_gl.FRAMEBUFFER, framebuffer);\n    _gl.framebufferTexture2D(_gl.FRAMEBUFFER, _gl.COLOR_ATTACHMENT0, textureTarget, renderTarget.__webglTexture, 0);\n\n  }\n\n  function setupRenderBuffer(renderbuffer, renderTarget) {\n\n    _gl.bindRenderbuffer(_gl.RENDERBUFFER, renderbuffer);\n\n    if (renderTarget.depthBuffer && !renderTarget.stencilBuffer) {\n\n      _gl.renderbufferStorage(_gl.RENDERBUFFER, _gl.DEPTH_COMPONENT16, renderTarget.width, renderTarget.height);\n      _gl.framebufferRenderbuffer(_gl.FRAMEBUFFER, _gl.DEPTH_ATTACHMENT, _gl.RENDERBUFFER, renderbuffer);\n\n      /* For some reason this is not working. Defaulting to RGBA4.\n                                                                                                          } else if ( ! renderTarget.depthBuffer && renderTarget.stencilBuffer ) {\n                                                                                                          \t\t_gl.renderbufferStorage( _gl.RENDERBUFFER, _gl.STENCIL_INDEX8, renderTarget.width, renderTarget.height );\n                                                                                                          \t_gl.framebufferRenderbuffer( _gl.FRAMEBUFFER, _gl.STENCIL_ATTACHMENT, _gl.RENDERBUFFER, renderbuffer );\n                                                                                                          */\n\n    } else if (renderTarget.depthBuffer && renderTarget.stencilBuffer) {\n\n      _gl.renderbufferStorage(_gl.RENDERBUFFER, _gl.DEPTH_STENCIL, renderTarget.width, renderTarget.height);\n      _gl.framebufferRenderbuffer(_gl.FRAMEBUFFER, _gl.DEPTH_STENCIL_ATTACHMENT, _gl.RENDERBUFFER, renderbuffer);\n\n    } else {\n\n      _gl.renderbufferStorage(_gl.RENDERBUFFER, _gl.RGBA4, renderTarget.width, renderTarget.height);\n\n    }\n\n  }\n\n  this.setRenderTarget = function (renderTarget) {\n\n    var isCube = renderTarget instanceof THREE.WebGLRenderTargetCube;\n\n    if (renderTarget && renderTarget.__webglFramebuffer === undefined) {\n\n      if (renderTarget.depthBuffer === undefined) renderTarget.depthBuffer = true;\n      if (renderTarget.stencilBuffer === undefined) renderTarget.stencilBuffer = true;\n\n      renderTarget.addEventListener('dispose', onRenderTargetDispose);\n\n      renderTarget.__webglTexture = _gl.createTexture();\n\n      _this.info.memory.textures++;\n\n      // Setup texture, create render and frame buffers\n\n      var isTargetPowerOfTwo = THREE.Math.isPowerOfTwo(renderTarget.width) && THREE.Math.isPowerOfTwo(renderTarget.height),\n      glFormat = paramThreeToGL(renderTarget.format),\n      glType = paramThreeToGL(renderTarget.type);\n\n      if (isCube) {\n\n        renderTarget.__webglFramebuffer = [];\n        renderTarget.__webglRenderbuffer = [];\n\n        _gl.bindTexture(_gl.TEXTURE_CUBE_MAP, renderTarget.__webglTexture);\n        setTextureParameters(_gl.TEXTURE_CUBE_MAP, renderTarget, isTargetPowerOfTwo);\n\n        for (var i = 0; i < 6; i++) {\n\n          renderTarget.__webglFramebuffer[i] = _gl.createFramebuffer();\n          renderTarget.__webglRenderbuffer[i] = _gl.createRenderbuffer();\n\n          _gl.texImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, glFormat, renderTarget.width, renderTarget.height, 0, glFormat, glType, null);\n\n          setupFrameBuffer(renderTarget.__webglFramebuffer[i], renderTarget, _gl.TEXTURE_CUBE_MAP_POSITIVE_X + i);\n          setupRenderBuffer(renderTarget.__webglRenderbuffer[i], renderTarget);\n\n        }\n\n        if (isTargetPowerOfTwo) _gl.generateMipmap(_gl.TEXTURE_CUBE_MAP);\n\n      } else {\n\n        renderTarget.__webglFramebuffer = _gl.createFramebuffer();\n\n        if (renderTarget.shareDepthFrom) {\n\n          renderTarget.__webglRenderbuffer = renderTarget.shareDepthFrom.__webglRenderbuffer;\n\n        } else {\n\n          renderTarget.__webglRenderbuffer = _gl.createRenderbuffer();\n\n        }\n\n        _gl.bindTexture(_gl.TEXTURE_2D, renderTarget.__webglTexture);\n        setTextureParameters(_gl.TEXTURE_2D, renderTarget, isTargetPowerOfTwo);\n\n        _gl.texImage2D(_gl.TEXTURE_2D, 0, glFormat, renderTarget.width, renderTarget.height, 0, glFormat, glType, null);\n\n        setupFrameBuffer(renderTarget.__webglFramebuffer, renderTarget, _gl.TEXTURE_2D);\n\n        if (renderTarget.shareDepthFrom) {\n\n          if (renderTarget.depthBuffer && !renderTarget.stencilBuffer) {\n\n            _gl.framebufferRenderbuffer(_gl.FRAMEBUFFER, _gl.DEPTH_ATTACHMENT, _gl.RENDERBUFFER, renderTarget.__webglRenderbuffer);\n\n          } else if (renderTarget.depthBuffer && renderTarget.stencilBuffer) {\n\n            _gl.framebufferRenderbuffer(_gl.FRAMEBUFFER, _gl.DEPTH_STENCIL_ATTACHMENT, _gl.RENDERBUFFER, renderTarget.__webglRenderbuffer);\n\n          }\n\n        } else {\n\n          setupRenderBuffer(renderTarget.__webglRenderbuffer, renderTarget);\n\n        }\n\n        if (isTargetPowerOfTwo) _gl.generateMipmap(_gl.TEXTURE_2D);\n\n      }\n\n      // Release everything\n\n      if (isCube) {\n\n        _gl.bindTexture(_gl.TEXTURE_CUBE_MAP, null);\n\n      } else {\n\n        _gl.bindTexture(_gl.TEXTURE_2D, null);\n\n      }\n\n      _gl.bindRenderbuffer(_gl.RENDERBUFFER, null);\n      _gl.bindFramebuffer(_gl.FRAMEBUFFER, null);\n\n    }\n\n    var framebuffer, width, height, vx, vy;\n\n    if (renderTarget) {\n\n      if (isCube) {\n\n        framebuffer = renderTarget.__webglFramebuffer[renderTarget.activeCubeFace];\n\n      } else {\n\n        framebuffer = renderTarget.__webglFramebuffer;\n\n      }\n\n      width = renderTarget.width;\n      height = renderTarget.height;\n\n      vx = 0;\n      vy = 0;\n\n    } else {\n\n      framebuffer = null;\n\n      width = _viewportWidth;\n      height = _viewportHeight;\n\n      vx = _viewportX;\n      vy = _viewportY;\n\n    }\n\n    if (framebuffer !== _currentFramebuffer) {\n\n      _gl.bindFramebuffer(_gl.FRAMEBUFFER, framebuffer);\n      _gl.viewport(vx, vy, width, height);\n\n      _currentFramebuffer = framebuffer;\n\n    }\n\n    _currentWidth = width;\n    _currentHeight = height;\n\n  };\n\n  this.readRenderTargetPixels = function (renderTarget, x, y, width, height, buffer) {\n\n    if (!(renderTarget instanceof THREE.WebGLRenderTarget)) {\n\n      console.error('THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not THREE.WebGLRenderTarget.');\n      return;\n\n    }\n\n    if (renderTarget.__webglFramebuffer) {\n\n      if (renderTarget.format !== THREE.RGBAFormat) {\n\n        console.error('THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not in RGBA format. readPixels can read only RGBA format.');\n        return;\n\n      }\n\n      var restore = false;\n\n      if (renderTarget.__webglFramebuffer !== _currentFramebuffer) {\n\n        _gl.bindFramebuffer(_gl.FRAMEBUFFER, renderTarget.__webglFramebuffer);\n\n        restore = true;\n\n      }\n\n      if (_gl.checkFramebufferStatus(_gl.FRAMEBUFFER) === _gl.FRAMEBUFFER_COMPLETE) {\n\n        _gl.readPixels(x, y, width, height, _gl.RGBA, _gl.UNSIGNED_BYTE, buffer);\n\n      } else {\n\n        console.error('THREE.WebGLRenderer.readRenderTargetPixels: readPixels from renderTarget failed. Framebuffer not complete.');\n\n      }\n\n      if (restore) {\n\n        _gl.bindFramebuffer(_gl.FRAMEBUFFER, _currentFramebuffer);\n\n      }\n\n    }\n\n  };\n\n  function updateRenderTargetMipmap(renderTarget) {\n\n    if (renderTarget instanceof THREE.WebGLRenderTargetCube) {\n\n      _gl.bindTexture(_gl.TEXTURE_CUBE_MAP, renderTarget.__webglTexture);\n      _gl.generateMipmap(_gl.TEXTURE_CUBE_MAP);\n      _gl.bindTexture(_gl.TEXTURE_CUBE_MAP, null);\n\n    } else {\n\n      _gl.bindTexture(_gl.TEXTURE_2D, renderTarget.__webglTexture);\n      _gl.generateMipmap(_gl.TEXTURE_2D);\n      _gl.bindTexture(_gl.TEXTURE_2D, null);\n\n    }\n\n  }\n\n  // Fallback filters for non-power-of-2 textures\n\n  function filterFallback(f) {\n\n    if (f === THREE.NearestFilter || f === THREE.NearestMipMapNearestFilter || f === THREE.NearestMipMapLinearFilter) {\n\n      return _gl.NEAREST;\n\n    }\n\n    return _gl.LINEAR;\n\n  }\n\n  // Map three.js constants to WebGL constants\n\n  function paramThreeToGL(p) {\n\n    var extension;\n\n    if (p === THREE.RepeatWrapping) return _gl.REPEAT;\n    if (p === THREE.ClampToEdgeWrapping) return _gl.CLAMP_TO_EDGE;\n    if (p === THREE.MirroredRepeatWrapping) return _gl.MIRRORED_REPEAT;\n\n    if (p === THREE.NearestFilter) return _gl.NEAREST;\n    if (p === THREE.NearestMipMapNearestFilter) return _gl.NEAREST_MIPMAP_NEAREST;\n    if (p === THREE.NearestMipMapLinearFilter) return _gl.NEAREST_MIPMAP_LINEAR;\n\n    if (p === THREE.LinearFilter) return _gl.LINEAR;\n    if (p === THREE.LinearMipMapNearestFilter) return _gl.LINEAR_MIPMAP_NEAREST;\n    if (p === THREE.LinearMipMapLinearFilter) return _gl.LINEAR_MIPMAP_LINEAR;\n\n    if (p === THREE.UnsignedByteType) return _gl.UNSIGNED_BYTE;\n    if (p === THREE.UnsignedShort4444Type) return _gl.UNSIGNED_SHORT_4_4_4_4;\n    if (p === THREE.UnsignedShort5551Type) return _gl.UNSIGNED_SHORT_5_5_5_1;\n    if (p === THREE.UnsignedShort565Type) return _gl.UNSIGNED_SHORT_5_6_5;\n\n    if (p === THREE.ByteType) return _gl.BYTE;\n    if (p === THREE.ShortType) return _gl.SHORT;\n    if (p === THREE.UnsignedShortType) return _gl.UNSIGNED_SHORT;\n    if (p === THREE.IntType) return _gl.INT;\n    if (p === THREE.UnsignedIntType) return _gl.UNSIGNED_INT;\n    if (p === THREE.FloatType) return _gl.FLOAT;\n\n    extension = extensions.get('OES_texture_half_float');\n\n    if (extension !== null) {\n\n      if (p === THREE.HalfFloatType) return extension.HALF_FLOAT_OES;\n\n    }\n\n    if (p === THREE.AlphaFormat) return _gl.ALPHA;\n    if (p === THREE.RGBFormat) return _gl.RGB;\n    if (p === THREE.RGBAFormat) return _gl.RGBA;\n    if (p === THREE.LuminanceFormat) return _gl.LUMINANCE;\n    if (p === THREE.LuminanceAlphaFormat) return _gl.LUMINANCE_ALPHA;\n\n    if (p === THREE.AddEquation) return _gl.FUNC_ADD;\n    if (p === THREE.SubtractEquation) return _gl.FUNC_SUBTRACT;\n    if (p === THREE.ReverseSubtractEquation) return _gl.FUNC_REVERSE_SUBTRACT;\n\n    if (p === THREE.ZeroFactor) return _gl.ZERO;\n    if (p === THREE.OneFactor) return _gl.ONE;\n    if (p === THREE.SrcColorFactor) return _gl.SRC_COLOR;\n    if (p === THREE.OneMinusSrcColorFactor) return _gl.ONE_MINUS_SRC_COLOR;\n    if (p === THREE.SrcAlphaFactor) return _gl.SRC_ALPHA;\n    if (p === THREE.OneMinusSrcAlphaFactor) return _gl.ONE_MINUS_SRC_ALPHA;\n    if (p === THREE.DstAlphaFactor) return _gl.DST_ALPHA;\n    if (p === THREE.OneMinusDstAlphaFactor) return _gl.ONE_MINUS_DST_ALPHA;\n\n    if (p === THREE.DstColorFactor) return _gl.DST_COLOR;\n    if (p === THREE.OneMinusDstColorFactor) return _gl.ONE_MINUS_DST_COLOR;\n    if (p === THREE.SrcAlphaSaturateFactor) return _gl.SRC_ALPHA_SATURATE;\n\n    extension = extensions.get('WEBGL_compressed_texture_s3tc');\n\n    if (extension !== null) {\n\n      if (p === THREE.RGB_S3TC_DXT1_Format) return extension.COMPRESSED_RGB_S3TC_DXT1_EXT;\n      if (p === THREE.RGBA_S3TC_DXT1_Format) return extension.COMPRESSED_RGBA_S3TC_DXT1_EXT;\n      if (p === THREE.RGBA_S3TC_DXT3_Format) return extension.COMPRESSED_RGBA_S3TC_DXT3_EXT;\n      if (p === THREE.RGBA_S3TC_DXT5_Format) return extension.COMPRESSED_RGBA_S3TC_DXT5_EXT;\n\n    }\n\n    extension = extensions.get('WEBGL_compressed_texture_pvrtc');\n\n    if (extension !== null) {\n\n      if (p === THREE.RGB_PVRTC_4BPPV1_Format) return extension.COMPRESSED_RGB_PVRTC_4BPPV1_IMG;\n      if (p === THREE.RGB_PVRTC_2BPPV1_Format) return extension.COMPRESSED_RGB_PVRTC_2BPPV1_IMG;\n      if (p === THREE.RGBA_PVRTC_4BPPV1_Format) return extension.COMPRESSED_RGBA_PVRTC_4BPPV1_IMG;\n      if (p === THREE.RGBA_PVRTC_2BPPV1_Format) return extension.COMPRESSED_RGBA_PVRTC_2BPPV1_IMG;\n\n    }\n\n    extension = extensions.get('EXT_blend_minmax');\n\n    if (extension !== null) {\n\n      if (p === THREE.MinEquation) return extension.MIN_EXT;\n      if (p === THREE.MaxEquation) return extension.MAX_EXT;\n\n    }\n\n    return 0;\n\n  }\n\n  // Allocations\n\n  function allocateBones(object) {\n\n    if (_supportsBoneTextures && object && object.skeleton && object.skeleton.useVertexTexture) {\n\n      return 1024;\n\n    } else {\n\n      // default for when object is not specified\n      // ( for example when prebuilding shader\n      //   to be used with multiple objects )\n      //\n      //  - leave some extra space for other uniforms\n      //  - limit here is ANGLE's 254 max uniform vectors\n      //    (up to 54 should be safe)\n\n      var nVertexUniforms = _gl.getParameter(_gl.MAX_VERTEX_UNIFORM_VECTORS);\n      var nVertexMatrices = Math.floor((nVertexUniforms - 20) / 4);\n\n      var maxBones = nVertexMatrices;\n\n      if (object !== undefined && object instanceof THREE.SkinnedMesh) {\n\n        maxBones = Math.min(object.skeleton.bones.length, maxBones);\n\n        if (maxBones < object.skeleton.bones.length) {\n\n          THREE.warn('WebGLRenderer: too many bones - ' + object.skeleton.bones.length + ', this GPU supports just ' + maxBones + ' (try OpenGL instead of ANGLE)');\n\n        }\n\n      }\n\n      return maxBones;\n\n    }\n\n  }\n\n  function allocateLights(lights) {\n\n    var dirLights = 0;\n    var pointLights = 0;\n    var spotLights = 0;\n    var hemiLights = 0;\n\n    for (var l = 0, ll = lights.length; l < ll; l++) {\n\n      var light = lights[l];\n\n      if (light.onlyShadow || light.visible === false) continue;\n\n      if (light instanceof THREE.DirectionalLight) dirLights++;\n      if (light instanceof THREE.PointLight) pointLights++;\n      if (light instanceof THREE.SpotLight) spotLights++;\n      if (light instanceof THREE.HemisphereLight) hemiLights++;\n\n    }\n\n    return { 'directional': dirLights, 'point': pointLights, 'spot': spotLights, 'hemi': hemiLights };\n\n  }\n\n  function allocateShadows(lights) {\n\n    var maxShadows = 0;\n\n    for (var l = 0, ll = lights.length; l < ll; l++) {\n\n      var light = lights[l];\n\n      if (!light.castShadow) continue;\n\n      if (light instanceof THREE.SpotLight) maxShadows++;\n      if (light instanceof THREE.DirectionalLight && !light.shadowCascade) maxShadows++;\n\n    }\n\n    return maxShadows;\n\n  }\n\n  // DEPRECATED\n\n  this.initMaterial = function () {\n\n    THREE.warn('THREE.WebGLRenderer: .initMaterial() has been removed.');\n\n  };\n\n  this.addPrePlugin = function () {\n\n    THREE.warn('THREE.WebGLRenderer: .addPrePlugin() has been removed.');\n\n  };\n\n  this.addPostPlugin = function () {\n\n    THREE.warn('THREE.WebGLRenderer: .addPostPlugin() has been removed.');\n\n  };\n\n  this.updateShadowMap = function () {\n\n    THREE.warn('THREE.WebGLRenderer: .updateShadowMap() has been removed.');\n\n  };\n\n};\n\n// File:src/renderers/WebGLRenderTarget.js\n\n/**\n * @author szimek / https://github.com/szimek/\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.WebGLRenderTarget = function (width, height, options) {\n\n  this.width = width;\n  this.height = height;\n\n  options = options || {};\n\n  this.wrapS = options.wrapS !== undefined ? options.wrapS : THREE.ClampToEdgeWrapping;\n  this.wrapT = options.wrapT !== undefined ? options.wrapT : THREE.ClampToEdgeWrapping;\n\n  this.magFilter = options.magFilter !== undefined ? options.magFilter : THREE.LinearFilter;\n  this.minFilter = options.minFilter !== undefined ? options.minFilter : THREE.LinearMipMapLinearFilter;\n\n  this.anisotropy = options.anisotropy !== undefined ? options.anisotropy : 1;\n\n  this.offset = new THREE.Vector2(0, 0);\n  this.repeat = new THREE.Vector2(1, 1);\n\n  this.format = options.format !== undefined ? options.format : THREE.RGBAFormat;\n  this.type = options.type !== undefined ? options.type : THREE.UnsignedByteType;\n\n  this.depthBuffer = options.depthBuffer !== undefined ? options.depthBuffer : true;\n  this.stencilBuffer = options.stencilBuffer !== undefined ? options.stencilBuffer : true;\n\n  this.generateMipmaps = true;\n\n  this.shareDepthFrom = options.shareDepthFrom !== undefined ? options.shareDepthFrom : null;\n\n};\n\nTHREE.WebGLRenderTarget.prototype = {\n\n  constructor: THREE.WebGLRenderTarget,\n\n  setSize: function setSize(width, height) {\n\n    this.width = width;\n    this.height = height;\n\n  },\n\n  clone: function clone() {\n\n    var tmp = new THREE.WebGLRenderTarget(this.width, this.height);\n\n    tmp.wrapS = this.wrapS;\n    tmp.wrapT = this.wrapT;\n\n    tmp.magFilter = this.magFilter;\n    tmp.minFilter = this.minFilter;\n\n    tmp.anisotropy = this.anisotropy;\n\n    tmp.offset.copy(this.offset);\n    tmp.repeat.copy(this.repeat);\n\n    tmp.format = this.format;\n    tmp.type = this.type;\n\n    tmp.depthBuffer = this.depthBuffer;\n    tmp.stencilBuffer = this.stencilBuffer;\n\n    tmp.generateMipmaps = this.generateMipmaps;\n\n    tmp.shareDepthFrom = this.shareDepthFrom;\n\n    return tmp;\n\n  },\n\n  dispose: function dispose() {\n\n    this.dispatchEvent({ type: 'dispose' });\n\n  } };\n\n\n\nTHREE.EventDispatcher.prototype.apply(THREE.WebGLRenderTarget.prototype);\n\n// File:src/renderers/WebGLRenderTargetCube.js\n\n/**\n * @author alteredq / http://alteredqualia.com\n */\n\nTHREE.WebGLRenderTargetCube = function (width, height, options) {\n\n  THREE.WebGLRenderTarget.call(this, width, height, options);\n\n  this.activeCubeFace = 0; // PX 0, NX 1, PY 2, NY 3, PZ 4, NZ 5\n\n};\n\nTHREE.WebGLRenderTargetCube.prototype = Object.create(THREE.WebGLRenderTarget.prototype);\nTHREE.WebGLRenderTargetCube.prototype.constructor = THREE.WebGLRenderTargetCube;\n\n// File:src/renderers/webgl/WebGLExtensions.js\n\n/**\n* @author mrdoob / http://mrdoob.com/\n*/\n\nTHREE.WebGLExtensions = function (gl) {\n\n  var extensions = {};\n\n  this.get = function (name) {\n\n    if (extensions[name] !== undefined) {\n\n      return extensions[name];\n\n    }\n\n    var extension;\n\n    switch (name) {\n\n      case 'EXT_texture_filter_anisotropic':\n        extension = gl.getExtension('EXT_texture_filter_anisotropic') || gl.getExtension('MOZ_EXT_texture_filter_anisotropic') || gl.getExtension('WEBKIT_EXT_texture_filter_anisotropic');\n        break;\n\n      case 'WEBGL_compressed_texture_s3tc':\n        extension = gl.getExtension('WEBGL_compressed_texture_s3tc') || gl.getExtension('MOZ_WEBGL_compressed_texture_s3tc') || gl.getExtension('WEBKIT_WEBGL_compressed_texture_s3tc');\n        break;\n\n      case 'WEBGL_compressed_texture_pvrtc':\n        extension = gl.getExtension('WEBGL_compressed_texture_pvrtc') || gl.getExtension('WEBKIT_WEBGL_compressed_texture_pvrtc');\n        break;\n\n      default:\n        extension = gl.getExtension(name);}\n\n\n\n    if (extension === null) {\n\n      THREE.warn('THREE.WebGLRenderer: ' + name + ' extension not supported.');\n\n    }\n\n    extensions[name] = extension;\n\n    return extension;\n\n  };\n\n};\n\n// File:src/renderers/webgl/WebGLProgram.js\n\nTHREE.WebGLProgram = function () {\n\n  var programIdCount = 0;\n\n  var generateDefines = function generateDefines(defines) {\n\n    var value,chunk,chunks = [];\n\n    for (var d in defines) {\n\n      value = defines[d];\n      if (value === false) continue;\n\n      chunk = '#define ' + d + ' ' + value;\n      chunks.push(chunk);\n\n    }\n\n    return chunks.join('\\n');\n\n  };\n\n  var cacheUniformLocations = function cacheUniformLocations(gl, program, identifiers) {\n\n    var uniforms = {};\n\n    for (var i = 0, l = identifiers.length; i < l; i++) {\n\n      var id = identifiers[i];\n      uniforms[id] = gl.getUniformLocation(program, id);\n\n    }\n\n    return uniforms;\n\n  };\n\n  var cacheAttributeLocations = function cacheAttributeLocations(gl, program, identifiers) {\n\n    var attributes = {};\n\n    for (var i = 0, l = identifiers.length; i < l; i++) {\n\n      var id = identifiers[i];\n      attributes[id] = gl.getAttribLocation(program, id);\n\n    }\n\n    return attributes;\n\n  };\n\n  return function (renderer, code, material, parameters) {\n\n    var _this = renderer;\n    var _gl = _this.context;\n\n    var defines = material.defines;\n    var uniforms = material.__webglShader.uniforms;\n    var attributes = material.attributes;\n\n    var vertexShader = material.__webglShader.vertexShader;\n    var fragmentShader = material.__webglShader.fragmentShader;\n\n    var index0AttributeName = material.index0AttributeName;\n\n    if (index0AttributeName === undefined && parameters.morphTargets === true) {\n\n      // programs with morphTargets displace position out of attribute 0\n\n      index0AttributeName = 'position';\n\n    }\n\n    var shadowMapTypeDefine = 'SHADOWMAP_TYPE_BASIC';\n\n    if (parameters.shadowMapType === THREE.PCFShadowMap) {\n\n      shadowMapTypeDefine = 'SHADOWMAP_TYPE_PCF';\n\n    } else if (parameters.shadowMapType === THREE.PCFSoftShadowMap) {\n\n      shadowMapTypeDefine = 'SHADOWMAP_TYPE_PCF_SOFT';\n\n    }\n\n    var envMapTypeDefine = 'ENVMAP_TYPE_CUBE';\n    var envMapModeDefine = 'ENVMAP_MODE_REFLECTION';\n    var envMapBlendingDefine = 'ENVMAP_BLENDING_MULTIPLY';\n\n    if (parameters.envMap) {\n\n      switch (material.envMap.mapping) {\n\n        case THREE.CubeReflectionMapping:\n        case THREE.CubeRefractionMapping:\n          envMapTypeDefine = 'ENVMAP_TYPE_CUBE';\n          break;\n\n        case THREE.EquirectangularReflectionMapping:\n        case THREE.EquirectangularRefractionMapping:\n          envMapTypeDefine = 'ENVMAP_TYPE_EQUIREC';\n          break;\n\n        case THREE.SphericalReflectionMapping:\n          envMapTypeDefine = 'ENVMAP_TYPE_SPHERE';\n          break;}\n\n\n\n      switch (material.envMap.mapping) {\n\n        case THREE.CubeRefractionMapping:\n        case THREE.EquirectangularRefractionMapping:\n          envMapModeDefine = 'ENVMAP_MODE_REFRACTION';\n          break;}\n\n\n\n      switch (material.combine) {\n\n        case THREE.MultiplyOperation:\n          envMapBlendingDefine = 'ENVMAP_BLENDING_MULTIPLY';\n          break;\n\n        case THREE.MixOperation:\n          envMapBlendingDefine = 'ENVMAP_BLENDING_MIX';\n          break;\n\n        case THREE.AddOperation:\n          envMapBlendingDefine = 'ENVMAP_BLENDING_ADD';\n          break;}\n\n\n\n    }\n\n    var gammaFactorDefine = renderer.gammaFactor > 0 ? renderer.gammaFactor : 1.0;\n\n    // console.log( 'building new program ' );\n\n    //\n\n    var customDefines = generateDefines(defines);\n\n    //\n\n    var program = _gl.createProgram();\n\n    var prefix_vertex, prefix_fragment;\n\n    if (material instanceof THREE.RawShaderMaterial) {\n\n      prefix_vertex = '';\n      prefix_fragment = '';\n\n    } else {\n\n      prefix_vertex = [\n\n      'precision ' + parameters.precision + ' float;',\n      'precision ' + parameters.precision + ' int;',\n\n      customDefines,\n\n      parameters.supportsVertexTextures ? '#define VERTEX_TEXTURES' : '',\n\n      _this.gammaInput ? '#define GAMMA_INPUT' : '',\n      _this.gammaOutput ? '#define GAMMA_OUTPUT' : '',\n      '#define GAMMA_FACTOR ' + gammaFactorDefine,\n\n      '#define MAX_DIR_LIGHTS ' + parameters.maxDirLights,\n      '#define MAX_POINT_LIGHTS ' + parameters.maxPointLights,\n      '#define MAX_SPOT_LIGHTS ' + parameters.maxSpotLights,\n      '#define MAX_HEMI_LIGHTS ' + parameters.maxHemiLights,\n\n      '#define MAX_SHADOWS ' + parameters.maxShadows,\n\n      '#define MAX_BONES ' + parameters.maxBones,\n\n      parameters.map ? '#define USE_MAP' : '',\n      parameters.envMap ? '#define USE_ENVMAP' : '',\n      parameters.envMap ? '#define ' + envMapModeDefine : '',\n      parameters.lightMap ? '#define USE_LIGHTMAP' : '',\n      parameters.bumpMap ? '#define USE_BUMPMAP' : '',\n      parameters.normalMap ? '#define USE_NORMALMAP' : '',\n      parameters.specularMap ? '#define USE_SPECULARMAP' : '',\n      parameters.alphaMap ? '#define USE_ALPHAMAP' : '',\n      parameters.vertexColors ? '#define USE_COLOR' : '',\n\n      parameters.flatShading ? '#define FLAT_SHADED' : '',\n\n      parameters.skinning ? '#define USE_SKINNING' : '',\n      parameters.useVertexTexture ? '#define BONE_TEXTURE' : '',\n\n      parameters.morphTargets ? '#define USE_MORPHTARGETS' : '',\n      parameters.morphNormals ? '#define USE_MORPHNORMALS' : '',\n      parameters.wrapAround ? '#define WRAP_AROUND' : '',\n      parameters.doubleSided ? '#define DOUBLE_SIDED' : '',\n      parameters.flipSided ? '#define FLIP_SIDED' : '',\n\n      parameters.shadowMapEnabled ? '#define USE_SHADOWMAP' : '',\n      parameters.shadowMapEnabled ? '#define ' + shadowMapTypeDefine : '',\n      parameters.shadowMapDebug ? '#define SHADOWMAP_DEBUG' : '',\n      parameters.shadowMapCascade ? '#define SHADOWMAP_CASCADE' : '',\n\n      parameters.sizeAttenuation ? '#define USE_SIZEATTENUATION' : '',\n\n      parameters.logarithmicDepthBuffer ? '#define USE_LOGDEPTHBUF' : '',\n      //_this._glExtensionFragDepth ? '#define USE_LOGDEPTHBUF_EXT' : '',\n\n\n      'uniform mat4 modelMatrix;',\n      'uniform mat4 modelViewMatrix;',\n      'uniform mat4 projectionMatrix;',\n      'uniform mat4 viewMatrix;',\n      'uniform mat3 normalMatrix;',\n      'uniform vec3 cameraPosition;',\n\n      'attribute vec3 position;',\n      'attribute vec3 normal;',\n      'attribute vec2 uv;',\n      'attribute vec2 uv2;',\n\n      '#ifdef USE_COLOR',\n\n      '\tattribute vec3 color;',\n\n      '#endif',\n\n      '#ifdef USE_MORPHTARGETS',\n\n      '\tattribute vec3 morphTarget0;',\n      '\tattribute vec3 morphTarget1;',\n      '\tattribute vec3 morphTarget2;',\n      '\tattribute vec3 morphTarget3;',\n\n      '\t#ifdef USE_MORPHNORMALS',\n\n      '\t\tattribute vec3 morphNormal0;',\n      '\t\tattribute vec3 morphNormal1;',\n      '\t\tattribute vec3 morphNormal2;',\n      '\t\tattribute vec3 morphNormal3;',\n\n      '\t#else',\n\n      '\t\tattribute vec3 morphTarget4;',\n      '\t\tattribute vec3 morphTarget5;',\n      '\t\tattribute vec3 morphTarget6;',\n      '\t\tattribute vec3 morphTarget7;',\n\n      '\t#endif',\n\n      '#endif',\n\n      '#ifdef USE_SKINNING',\n\n      '\tattribute vec4 skinIndex;',\n      '\tattribute vec4 skinWeight;',\n\n      '#endif',\n\n      ''].\n\n      join('\\n');\n\n      prefix_fragment = [\n\n      'precision ' + parameters.precision + ' float;',\n      'precision ' + parameters.precision + ' int;',\n\n      parameters.bumpMap || parameters.normalMap || parameters.flatShading ? '#extension GL_OES_standard_derivatives : enable' : '',\n\n      customDefines,\n\n      '#define MAX_DIR_LIGHTS ' + parameters.maxDirLights,\n      '#define MAX_POINT_LIGHTS ' + parameters.maxPointLights,\n      '#define MAX_SPOT_LIGHTS ' + parameters.maxSpotLights,\n      '#define MAX_HEMI_LIGHTS ' + parameters.maxHemiLights,\n\n      '#define MAX_SHADOWS ' + parameters.maxShadows,\n\n      parameters.alphaTest ? '#define ALPHATEST ' + parameters.alphaTest : '',\n\n      _this.gammaInput ? '#define GAMMA_INPUT' : '',\n      _this.gammaOutput ? '#define GAMMA_OUTPUT' : '',\n      '#define GAMMA_FACTOR ' + gammaFactorDefine,\n\n      parameters.useFog && parameters.fog ? '#define USE_FOG' : '',\n      parameters.useFog && parameters.fogExp ? '#define FOG_EXP2' : '',\n\n      parameters.map ? '#define USE_MAP' : '',\n      parameters.envMap ? '#define USE_ENVMAP' : '',\n      parameters.envMap ? '#define ' + envMapTypeDefine : '',\n      parameters.envMap ? '#define ' + envMapModeDefine : '',\n      parameters.envMap ? '#define ' + envMapBlendingDefine : '',\n      parameters.lightMap ? '#define USE_LIGHTMAP' : '',\n      parameters.bumpMap ? '#define USE_BUMPMAP' : '',\n      parameters.normalMap ? '#define USE_NORMALMAP' : '',\n      parameters.specularMap ? '#define USE_SPECULARMAP' : '',\n      parameters.alphaMap ? '#define USE_ALPHAMAP' : '',\n      parameters.vertexColors ? '#define USE_COLOR' : '',\n\n      parameters.flatShading ? '#define FLAT_SHADED' : '',\n\n      parameters.metal ? '#define METAL' : '',\n      parameters.wrapAround ? '#define WRAP_AROUND' : '',\n      parameters.doubleSided ? '#define DOUBLE_SIDED' : '',\n      parameters.flipSided ? '#define FLIP_SIDED' : '',\n\n      parameters.shadowMapEnabled ? '#define USE_SHADOWMAP' : '',\n      parameters.shadowMapEnabled ? '#define ' + shadowMapTypeDefine : '',\n      parameters.shadowMapDebug ? '#define SHADOWMAP_DEBUG' : '',\n      parameters.shadowMapCascade ? '#define SHADOWMAP_CASCADE' : '',\n\n      parameters.logarithmicDepthBuffer ? '#define USE_LOGDEPTHBUF' : '',\n      //_this._glExtensionFragDepth ? '#define USE_LOGDEPTHBUF_EXT' : '',\n\n      'uniform mat4 viewMatrix;',\n      'uniform vec3 cameraPosition;',\n      ''].\n\n      join('\\n');\n\n    }\n\n    var glVertexShader = new THREE.WebGLShader(_gl, _gl.VERTEX_SHADER, prefix_vertex + vertexShader);\n    var glFragmentShader = new THREE.WebGLShader(_gl, _gl.FRAGMENT_SHADER, prefix_fragment + fragmentShader);\n\n    _gl.attachShader(program, glVertexShader);\n    _gl.attachShader(program, glFragmentShader);\n\n    if (index0AttributeName !== undefined) {\n\n      // Force a particular attribute to index 0.\n      // because potentially expensive emulation is done by browser if attribute 0 is disabled.\n      // And, color, for example is often automatically bound to index 0 so disabling it\n\n      _gl.bindAttribLocation(program, 0, index0AttributeName);\n\n    }\n\n    _gl.linkProgram(program);\n\n    var programLogInfo = _gl.getProgramInfoLog(program);\n\n    if (_gl.getProgramParameter(program, _gl.LINK_STATUS) === false) {\n\n      THREE.error('THREE.WebGLProgram: shader error: ' + _gl.getError(), 'gl.VALIDATE_STATUS', _gl.getProgramParameter(program, _gl.VALIDATE_STATUS), 'gl.getPRogramInfoLog', programLogInfo);\n\n    }\n\n    if (programLogInfo !== '') {\n\n      THREE.warn('THREE.WebGLProgram: gl.getProgramInfoLog()' + programLogInfo);\n      // THREE.warn( _gl.getExtension( 'WEBGL_debug_shaders' ).getTranslatedShaderSource( glVertexShader ) );\n      // THREE.warn( _gl.getExtension( 'WEBGL_debug_shaders' ).getTranslatedShaderSource( glFragmentShader ) );\n\n    }\n\n    // clean up\n\n    _gl.deleteShader(glVertexShader);\n    _gl.deleteShader(glFragmentShader);\n\n    // cache uniform locations\n\n    var identifiers = [\n\n    'viewMatrix',\n    'modelViewMatrix',\n    'projectionMatrix',\n    'normalMatrix',\n    'modelMatrix',\n    'cameraPosition',\n    'morphTargetInfluences',\n    'bindMatrix',\n    'bindMatrixInverse'];\n\n\n\n    if (parameters.useVertexTexture) {\n\n      identifiers.push('boneTexture');\n      identifiers.push('boneTextureWidth');\n      identifiers.push('boneTextureHeight');\n\n    } else {\n\n      identifiers.push('boneGlobalMatrices');\n\n    }\n\n    if (parameters.logarithmicDepthBuffer) {\n\n      identifiers.push('logDepthBufFC');\n\n    }\n\n\n    for (var u in uniforms) {\n\n      identifiers.push(u);\n\n    }\n\n    this.uniforms = cacheUniformLocations(_gl, program, identifiers);\n\n    // cache attributes locations\n\n    identifiers = [\n\n    'position',\n    'normal',\n    'uv',\n    'uv2',\n    'tangent',\n    'color',\n    'skinIndex',\n    'skinWeight',\n    'lineDistance'];\n\n\n\n    for (var i = 0; i < parameters.maxMorphTargets; i++) {\n\n      identifiers.push('morphTarget' + i);\n\n    }\n\n    for (var i = 0; i < parameters.maxMorphNormals; i++) {\n\n      identifiers.push('morphNormal' + i);\n\n    }\n\n    for (var a in attributes) {\n\n      identifiers.push(a);\n\n    }\n\n    this.attributes = cacheAttributeLocations(_gl, program, identifiers);\n    this.attributesKeys = Object.keys(this.attributes);\n\n    //\n\n    this.id = programIdCount++;\n    this.code = code;\n    this.usedTimes = 1;\n    this.program = program;\n    this.vertexShader = glVertexShader;\n    this.fragmentShader = glFragmentShader;\n\n    return this;\n\n  };\n\n}();\n\n// File:src/renderers/webgl/WebGLShader.js\n\nTHREE.WebGLShader = function () {\n\n  var addLineNumbers = function addLineNumbers(string) {\n\n    var lines = string.split('\\n');\n\n    for (var i = 0; i < lines.length; i++) {\n\n      lines[i] = i + 1 + ': ' + lines[i];\n\n    }\n\n    return lines.join('\\n');\n\n  };\n\n  return function (gl, type, string) {\n\n    var shader = gl.createShader(type);\n\n    gl.shaderSource(shader, string);\n    gl.compileShader(shader);\n\n    if (gl.getShaderParameter(shader, gl.COMPILE_STATUS) === false) {\n\n      THREE.error('THREE.WebGLShader: Shader couldn\\'t compile.');\n\n    }\n\n    if (gl.getShaderInfoLog(shader) !== '') {\n\n      THREE.warn('THREE.WebGLShader: gl.getShaderInfoLog()', gl.getShaderInfoLog(shader), addLineNumbers(string));\n\n    }\n\n    // --enable-privileged-webgl-extension\n    // console.log( type, gl.getExtension( 'WEBGL_debug_shaders' ).getTranslatedShaderSource( shader ) );\n\n    return shader;\n\n  };\n\n}();\n\n// File:src/renderers/webgl/WebGLState.js\n\n/**\n* @author mrdoob / http://mrdoob.com/\n*/\n\nTHREE.WebGLState = function (gl, paramThreeToGL) {\n\n  var newAttributes = new Uint8Array(16);\n  var enabledAttributes = new Uint8Array(16);\n\n  var currentBlending = null;\n  var currentBlendEquation = null;\n  var currentBlendSrc = null;\n  var currentBlendDst = null;\n  var currentBlendEquationAlpha = null;\n  var currentBlendSrcAlpha = null;\n  var currentBlendDstAlpha = null;\n\n  var currentDepthTest = null;\n  var currentDepthWrite = null;\n\n  var currentColorWrite = null;\n\n  var currentDoubleSided = null;\n  var currentFlipSided = null;\n\n  var currentLineWidth = null;\n\n  var currentPolygonOffset = null;\n  var currentPolygonOffsetFactor = null;\n  var currentPolygonOffsetUnits = null;\n\n  this.initAttributes = function () {\n\n    for (var i = 0, l = newAttributes.length; i < l; i++) {\n\n      newAttributes[i] = 0;\n\n    }\n\n  };\n\n  this.enableAttribute = function (attribute) {\n\n    newAttributes[attribute] = 1;\n\n    if (enabledAttributes[attribute] === 0) {\n\n      gl.enableVertexAttribArray(attribute);\n      enabledAttributes[attribute] = 1;\n\n    }\n\n  };\n\n  this.disableUnusedAttributes = function () {\n\n    for (var i = 0, l = enabledAttributes.length; i < l; i++) {\n\n      if (enabledAttributes[i] !== newAttributes[i]) {\n\n        gl.disableVertexAttribArray(i);\n        enabledAttributes[i] = 0;\n\n      }\n\n    }\n\n  };\n\n  this.setBlending = function (blending, blendEquation, blendSrc, blendDst, blendEquationAlpha, blendSrcAlpha, blendDstAlpha) {\n\n    if (blending !== currentBlending) {\n\n      if (blending === THREE.NoBlending) {\n\n        gl.disable(gl.BLEND);\n\n      } else if (blending === THREE.AdditiveBlending) {\n\n        gl.enable(gl.BLEND);\n        gl.blendEquation(gl.FUNC_ADD);\n        gl.blendFunc(gl.SRC_ALPHA, gl.ONE);\n\n      } else if (blending === THREE.SubtractiveBlending) {\n\n        // TODO: Find blendFuncSeparate() combination\n        gl.enable(gl.BLEND);\n        gl.blendEquation(gl.FUNC_ADD);\n        gl.blendFunc(gl.ZERO, gl.ONE_MINUS_SRC_COLOR);\n\n      } else if (blending === THREE.MultiplyBlending) {\n\n        // TODO: Find blendFuncSeparate() combination\n        gl.enable(gl.BLEND);\n        gl.blendEquation(gl.FUNC_ADD);\n        gl.blendFunc(gl.ZERO, gl.SRC_COLOR);\n\n      } else if (blending === THREE.CustomBlending) {\n\n        gl.enable(gl.BLEND);\n\n      } else {\n\n        gl.enable(gl.BLEND);\n        gl.blendEquationSeparate(gl.FUNC_ADD, gl.FUNC_ADD);\n        gl.blendFuncSeparate(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA, gl.ONE, gl.ONE_MINUS_SRC_ALPHA);\n\n      }\n\n      currentBlending = blending;\n\n    }\n\n    if (blending === THREE.CustomBlending) {\n\n      blendEquationAlpha = blendEquationAlpha || blendEquation;\n      blendSrcAlpha = blendSrcAlpha || blendSrc;\n      blendDstAlpha = blendDstAlpha || blendDst;\n\n      if (blendEquation !== currentBlendEquation || blendEquationAlpha !== currentBlendEquationAlpha) {\n\n        gl.blendEquationSeparate(paramThreeToGL(blendEquation), paramThreeToGL(blendEquationAlpha));\n\n        currentBlendEquation = blendEquation;\n        currentBlendEquationAlpha = blendEquationAlpha;\n\n      }\n\n      if (blendSrc !== currentBlendSrc || blendDst !== currentBlendDst || blendSrcAlpha !== currentBlendSrcAlpha || blendDstAlpha !== currentBlendDstAlpha) {\n\n        gl.blendFuncSeparate(paramThreeToGL(blendSrc), paramThreeToGL(blendDst), paramThreeToGL(blendSrcAlpha), paramThreeToGL(blendDstAlpha));\n\n        currentBlendSrc = blendSrc;\n        currentBlendDst = blendDst;\n        currentBlendSrcAlpha = blendSrcAlpha;\n        currentBlendDstAlpha = blendDstAlpha;\n\n      }\n\n    } else {\n\n      currentBlendEquation = null;\n      currentBlendSrc = null;\n      currentBlendDst = null;\n      currentBlendEquationAlpha = null;\n      currentBlendSrcAlpha = null;\n      currentBlendDstAlpha = null;\n\n    }\n\n  };\n\n  this.setDepthTest = function (depthTest) {\n\n    if (currentDepthTest !== depthTest) {\n\n      if (depthTest) {\n\n        gl.enable(gl.DEPTH_TEST);\n\n      } else {\n\n        gl.disable(gl.DEPTH_TEST);\n\n      }\n\n      currentDepthTest = depthTest;\n\n    }\n\n  };\n\n  this.setDepthWrite = function (depthWrite) {\n\n    if (currentDepthWrite !== depthWrite) {\n\n      gl.depthMask(depthWrite);\n      currentDepthWrite = depthWrite;\n\n    }\n\n  };\n\n  this.setColorWrite = function (colorWrite) {\n\n    if (currentColorWrite !== colorWrite) {\n\n      gl.colorMask(colorWrite, colorWrite, colorWrite, colorWrite);\n      currentColorWrite = colorWrite;\n\n    }\n\n  };\n\n  this.setDoubleSided = function (doubleSided) {\n\n    if (currentDoubleSided !== doubleSided) {\n\n      if (doubleSided) {\n\n        gl.disable(gl.CULL_FACE);\n\n      } else {\n\n        gl.enable(gl.CULL_FACE);\n\n      }\n\n      currentDoubleSided = doubleSided;\n\n    }\n\n  };\n\n  this.setFlipSided = function (flipSided) {\n\n    if (currentFlipSided !== flipSided) {\n\n      if (flipSided) {\n\n        gl.frontFace(gl.CW);\n\n      } else {\n\n        gl.frontFace(gl.CCW);\n\n      }\n\n      currentFlipSided = flipSided;\n\n    }\n\n  };\n\n  this.setLineWidth = function (width) {\n\n    if (width !== currentLineWidth) {\n\n      gl.lineWidth(width);\n\n      currentLineWidth = width;\n\n    }\n\n  };\n\n  this.setPolygonOffset = function (polygonoffset, factor, units) {\n\n    if (currentPolygonOffset !== polygonoffset) {\n\n      if (polygonoffset) {\n\n        gl.enable(gl.POLYGON_OFFSET_FILL);\n\n      } else {\n\n        gl.disable(gl.POLYGON_OFFSET_FILL);\n\n      }\n\n      currentPolygonOffset = polygonoffset;\n\n    }\n\n    if (polygonoffset && (currentPolygonOffsetFactor !== factor || currentPolygonOffsetUnits !== units)) {\n\n      gl.polygonOffset(factor, units);\n\n      currentPolygonOffsetFactor = factor;\n      currentPolygonOffsetUnits = units;\n\n    }\n\n  };\n\n  this.reset = function () {\n\n    for (var i = 0; i < enabledAttributes.length; i++) {\n\n      enabledAttributes[i] = 0;\n\n    }\n\n    currentBlending = null;\n    currentDepthTest = null;\n    currentDepthWrite = null;\n    currentColorWrite = null;\n    currentDoubleSided = null;\n    currentFlipSided = null;\n\n  };\n\n};\n\n// File:src/renderers/webgl/plugins/LensFlarePlugin.js\n\n/**\n * @author mikael emtinger / http://gomo.se/\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.LensFlarePlugin = function (renderer, flares) {\n\n  var gl = renderer.context;\n\n  var vertexBuffer, elementBuffer;\n  var program, attributes, uniforms;\n  var hasVertexTexture;\n\n  var tempTexture, occlusionTexture;\n\n  var init = function init() {\n\n    var vertices = new Float32Array([\n    -1, -1, 0, 0,\n    1, -1, 1, 0,\n    1, 1, 1, 1,\n    -1, 1, 0, 1]);\n\n\n    var faces = new Uint16Array([\n    0, 1, 2,\n    0, 2, 3]);\n\n\n    // buffers\n\n    vertexBuffer = gl.createBuffer();\n    elementBuffer = gl.createBuffer();\n\n    gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer);\n    gl.bufferData(gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW);\n\n    gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, elementBuffer);\n    gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, faces, gl.STATIC_DRAW);\n\n    // textures\n\n    tempTexture = gl.createTexture();\n    occlusionTexture = gl.createTexture();\n\n    gl.bindTexture(gl.TEXTURE_2D, tempTexture);\n    gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGB, 16, 16, 0, gl.RGB, gl.UNSIGNED_BYTE, null);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);\n\n    gl.bindTexture(gl.TEXTURE_2D, occlusionTexture);\n    gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 16, 16, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);\n\n    hasVertexTexture = gl.getParameter(gl.MAX_VERTEX_TEXTURE_IMAGE_UNITS) > 0;\n\n    var shader;\n\n    if (hasVertexTexture) {\n\n      shader = {\n\n        vertexShader: [\n\n        \"uniform lowp int renderType;\",\n\n        \"uniform vec3 screenPosition;\",\n        \"uniform vec2 scale;\",\n        \"uniform float rotation;\",\n\n        \"uniform sampler2D occlusionMap;\",\n\n        \"attribute vec2 position;\",\n        \"attribute vec2 uv;\",\n\n        \"varying vec2 vUV;\",\n        \"varying float vVisibility;\",\n\n        \"void main() {\",\n\n        \"vUV = uv;\",\n\n        \"vec2 pos = position;\",\n\n        \"if( renderType == 2 ) {\",\n\n        \"vec4 visibility = texture2D( occlusionMap, vec2( 0.1, 0.1 ) );\",\n        \"visibility += texture2D( occlusionMap, vec2( 0.5, 0.1 ) );\",\n        \"visibility += texture2D( occlusionMap, vec2( 0.9, 0.1 ) );\",\n        \"visibility += texture2D( occlusionMap, vec2( 0.9, 0.5 ) );\",\n        \"visibility += texture2D( occlusionMap, vec2( 0.9, 0.9 ) );\",\n        \"visibility += texture2D( occlusionMap, vec2( 0.5, 0.9 ) );\",\n        \"visibility += texture2D( occlusionMap, vec2( 0.1, 0.9 ) );\",\n        \"visibility += texture2D( occlusionMap, vec2( 0.1, 0.5 ) );\",\n        \"visibility += texture2D( occlusionMap, vec2( 0.5, 0.5 ) );\",\n\n        \"vVisibility =        visibility.r / 9.0;\",\n        \"vVisibility *= 1.0 - visibility.g / 9.0;\",\n        \"vVisibility *=       visibility.b / 9.0;\",\n        \"vVisibility *= 1.0 - visibility.a / 9.0;\",\n\n        \"pos.x = cos( rotation ) * position.x - sin( rotation ) * position.y;\",\n        \"pos.y = sin( rotation ) * position.x + cos( rotation ) * position.y;\",\n\n        \"}\",\n\n        \"gl_Position = vec4( ( pos * scale + screenPosition.xy ).xy, screenPosition.z, 1.0 );\",\n\n        \"}\"].\n\n        join(\"\\n\"),\n\n        fragmentShader: [\n\n        \"uniform lowp int renderType;\",\n\n        \"uniform sampler2D map;\",\n        \"uniform float opacity;\",\n        \"uniform vec3 color;\",\n\n        \"varying vec2 vUV;\",\n        \"varying float vVisibility;\",\n\n        \"void main() {\",\n\n        // pink square\n\n        \"if( renderType == 0 ) {\",\n\n        \"gl_FragColor = vec4( 1.0, 0.0, 1.0, 0.0 );\",\n\n        // restore\n\n        \"} else if( renderType == 1 ) {\",\n\n        \"gl_FragColor = texture2D( map, vUV );\",\n\n        // flare\n\n        \"} else {\",\n\n        \"vec4 texture = texture2D( map, vUV );\",\n        \"texture.a *= opacity * vVisibility;\",\n        \"gl_FragColor = texture;\",\n        \"gl_FragColor.rgb *= color;\",\n\n        \"}\",\n\n        \"}\"].\n\n        join(\"\\n\") };\n\n\n\n    } else {\n\n      shader = {\n\n        vertexShader: [\n\n        \"uniform lowp int renderType;\",\n\n        \"uniform vec3 screenPosition;\",\n        \"uniform vec2 scale;\",\n        \"uniform float rotation;\",\n\n        \"attribute vec2 position;\",\n        \"attribute vec2 uv;\",\n\n        \"varying vec2 vUV;\",\n\n        \"void main() {\",\n\n        \"vUV = uv;\",\n\n        \"vec2 pos = position;\",\n\n        \"if( renderType == 2 ) {\",\n\n        \"pos.x = cos( rotation ) * position.x - sin( rotation ) * position.y;\",\n        \"pos.y = sin( rotation ) * position.x + cos( rotation ) * position.y;\",\n\n        \"}\",\n\n        \"gl_Position = vec4( ( pos * scale + screenPosition.xy ).xy, screenPosition.z, 1.0 );\",\n\n        \"}\"].\n\n        join(\"\\n\"),\n\n        fragmentShader: [\n\n        \"precision mediump float;\",\n\n        \"uniform lowp int renderType;\",\n\n        \"uniform sampler2D map;\",\n        \"uniform sampler2D occlusionMap;\",\n        \"uniform float opacity;\",\n        \"uniform vec3 color;\",\n\n        \"varying vec2 vUV;\",\n\n        \"void main() {\",\n\n        // pink square\n\n        \"if( renderType == 0 ) {\",\n\n        \"gl_FragColor = vec4( texture2D( map, vUV ).rgb, 0.0 );\",\n\n        // restore\n\n        \"} else if( renderType == 1 ) {\",\n\n        \"gl_FragColor = texture2D( map, vUV );\",\n\n        // flare\n\n        \"} else {\",\n\n        \"float visibility = texture2D( occlusionMap, vec2( 0.5, 0.1 ) ).a;\",\n        \"visibility += texture2D( occlusionMap, vec2( 0.9, 0.5 ) ).a;\",\n        \"visibility += texture2D( occlusionMap, vec2( 0.5, 0.9 ) ).a;\",\n        \"visibility += texture2D( occlusionMap, vec2( 0.1, 0.5 ) ).a;\",\n        \"visibility = ( 1.0 - visibility / 4.0 );\",\n\n        \"vec4 texture = texture2D( map, vUV );\",\n        \"texture.a *= opacity * visibility;\",\n        \"gl_FragColor = texture;\",\n        \"gl_FragColor.rgb *= color;\",\n\n        \"}\",\n\n        \"}\"].\n\n        join(\"\\n\") };\n\n\n\n    }\n\n    program = createProgram(shader);\n\n    attributes = {\n      vertex: gl.getAttribLocation(program, \"position\"),\n      uv: gl.getAttribLocation(program, \"uv\") };\n\n\n    uniforms = {\n      renderType: gl.getUniformLocation(program, \"renderType\"),\n      map: gl.getUniformLocation(program, \"map\"),\n      occlusionMap: gl.getUniformLocation(program, \"occlusionMap\"),\n      opacity: gl.getUniformLocation(program, \"opacity\"),\n      color: gl.getUniformLocation(program, \"color\"),\n      scale: gl.getUniformLocation(program, \"scale\"),\n      rotation: gl.getUniformLocation(program, \"rotation\"),\n      screenPosition: gl.getUniformLocation(program, \"screenPosition\") };\n\n\n  };\n\n  /*\n      * Render lens flares\n      * Method: renders 16x16 0xff00ff-colored points scattered over the light source area,\n      *         reads these back and calculates occlusion.\n      */\n\n  this.render = function (scene, camera, viewportWidth, viewportHeight) {\n\n    if (flares.length === 0) return;\n\n    var tempPosition = new THREE.Vector3();\n\n    var invAspect = viewportHeight / viewportWidth,\n    halfViewportWidth = viewportWidth * 0.5,\n    halfViewportHeight = viewportHeight * 0.5;\n\n    var size = 16 / viewportHeight,\n    scale = new THREE.Vector2(size * invAspect, size);\n\n    var screenPosition = new THREE.Vector3(1, 1, 0),\n    screenPositionPixels = new THREE.Vector2(1, 1);\n\n    if (program === undefined) {\n\n      init();\n\n    }\n\n    gl.useProgram(program);\n\n    gl.enableVertexAttribArray(attributes.vertex);\n    gl.enableVertexAttribArray(attributes.uv);\n\n    // loop through all lens flares to update their occlusion and positions\n    // setup gl and common used attribs/unforms\n\n    gl.uniform1i(uniforms.occlusionMap, 0);\n    gl.uniform1i(uniforms.map, 1);\n\n    gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer);\n    gl.vertexAttribPointer(attributes.vertex, 2, gl.FLOAT, false, 2 * 8, 0);\n    gl.vertexAttribPointer(attributes.uv, 2, gl.FLOAT, false, 2 * 8, 8);\n\n    gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, elementBuffer);\n\n    gl.disable(gl.CULL_FACE);\n    gl.depthMask(false);\n\n    for (var i = 0, l = flares.length; i < l; i++) {\n\n      size = 16 / viewportHeight;\n      scale.set(size * invAspect, size);\n\n      // calc object screen position\n\n      var flare = flares[i];\n\n      tempPosition.set(flare.matrixWorld.elements[12], flare.matrixWorld.elements[13], flare.matrixWorld.elements[14]);\n\n      tempPosition.applyMatrix4(camera.matrixWorldInverse);\n      tempPosition.applyProjection(camera.projectionMatrix);\n\n      // setup arrays for gl programs\n\n      screenPosition.copy(tempPosition);\n\n      screenPositionPixels.x = screenPosition.x * halfViewportWidth + halfViewportWidth;\n      screenPositionPixels.y = screenPosition.y * halfViewportHeight + halfViewportHeight;\n\n      // screen cull\n\n      if (hasVertexTexture ||\n      screenPositionPixels.x > 0 &&\n      screenPositionPixels.x < viewportWidth &&\n      screenPositionPixels.y > 0 &&\n      screenPositionPixels.y < viewportHeight) {\n\n        // save current RGB to temp texture\n\n        gl.activeTexture(gl.TEXTURE1);\n        gl.bindTexture(gl.TEXTURE_2D, tempTexture);\n        gl.copyTexImage2D(gl.TEXTURE_2D, 0, gl.RGB, screenPositionPixels.x - 8, screenPositionPixels.y - 8, 16, 16, 0);\n\n\n        // render pink quad\n\n        gl.uniform1i(uniforms.renderType, 0);\n        gl.uniform2f(uniforms.scale, scale.x, scale.y);\n        gl.uniform3f(uniforms.screenPosition, screenPosition.x, screenPosition.y, screenPosition.z);\n\n        gl.disable(gl.BLEND);\n        gl.enable(gl.DEPTH_TEST);\n\n        gl.drawElements(gl.TRIANGLES, 6, gl.UNSIGNED_SHORT, 0);\n\n\n        // copy result to occlusionMap\n\n        gl.activeTexture(gl.TEXTURE0);\n        gl.bindTexture(gl.TEXTURE_2D, occlusionTexture);\n        gl.copyTexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, screenPositionPixels.x - 8, screenPositionPixels.y - 8, 16, 16, 0);\n\n\n        // restore graphics\n\n        gl.uniform1i(uniforms.renderType, 1);\n        gl.disable(gl.DEPTH_TEST);\n\n        gl.activeTexture(gl.TEXTURE1);\n        gl.bindTexture(gl.TEXTURE_2D, tempTexture);\n        gl.drawElements(gl.TRIANGLES, 6, gl.UNSIGNED_SHORT, 0);\n\n\n        // update object positions\n\n        flare.positionScreen.copy(screenPosition);\n\n        if (flare.customUpdateCallback) {\n\n          flare.customUpdateCallback(flare);\n\n        } else {\n\n          flare.updateLensFlares();\n\n        }\n\n        // render flares\n\n        gl.uniform1i(uniforms.renderType, 2);\n        gl.enable(gl.BLEND);\n\n        for (var j = 0, jl = flare.lensFlares.length; j < jl; j++) {\n\n          var sprite = flare.lensFlares[j];\n\n          if (sprite.opacity > 0.001 && sprite.scale > 0.001) {\n\n            screenPosition.x = sprite.x;\n            screenPosition.y = sprite.y;\n            screenPosition.z = sprite.z;\n\n            size = sprite.size * sprite.scale / viewportHeight;\n\n            scale.x = size * invAspect;\n            scale.y = size;\n\n            gl.uniform3f(uniforms.screenPosition, screenPosition.x, screenPosition.y, screenPosition.z);\n            gl.uniform2f(uniforms.scale, scale.x, scale.y);\n            gl.uniform1f(uniforms.rotation, sprite.rotation);\n\n            gl.uniform1f(uniforms.opacity, sprite.opacity);\n            gl.uniform3f(uniforms.color, sprite.color.r, sprite.color.g, sprite.color.b);\n\n            renderer.state.setBlending(sprite.blending, sprite.blendEquation, sprite.blendSrc, sprite.blendDst);\n            renderer.setTexture(sprite.texture, 1);\n\n            gl.drawElements(gl.TRIANGLES, 6, gl.UNSIGNED_SHORT, 0);\n\n          }\n\n        }\n\n      }\n\n    }\n\n    // restore gl\n\n    gl.enable(gl.CULL_FACE);\n    gl.enable(gl.DEPTH_TEST);\n    gl.depthMask(true);\n\n    renderer.resetGLState();\n\n  };\n\n  function createProgram(shader) {\n\n    var program = gl.createProgram();\n\n    var fragmentShader = gl.createShader(gl.FRAGMENT_SHADER);\n    var vertexShader = gl.createShader(gl.VERTEX_SHADER);\n\n    var prefix = \"precision \" + renderer.getPrecision() + \" float;\\n\";\n\n    gl.shaderSource(fragmentShader, prefix + shader.fragmentShader);\n    gl.shaderSource(vertexShader, prefix + shader.vertexShader);\n\n    gl.compileShader(fragmentShader);\n    gl.compileShader(vertexShader);\n\n    gl.attachShader(program, fragmentShader);\n    gl.attachShader(program, vertexShader);\n\n    gl.linkProgram(program);\n\n    return program;\n\n  }\n\n};\n\n// File:src/renderers/webgl/plugins/ShadowMapPlugin.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.ShadowMapPlugin = function (_renderer, _lights, _webglObjects, _webglObjectsImmediate) {\n\n  var _gl = _renderer.context;\n\n  var _depthMaterial,_depthMaterialMorph,_depthMaterialSkin,_depthMaterialMorphSkin,\n\n  _frustum = new THREE.Frustum(),\n  _projScreenMatrix = new THREE.Matrix4(),\n\n  _min = new THREE.Vector3(),\n  _max = new THREE.Vector3(),\n\n  _matrixPosition = new THREE.Vector3(),\n\n  _renderList = [];\n\n  // init\n\n  var depthShader = THREE.ShaderLib[\"depthRGBA\"];\n  var depthUniforms = THREE.UniformsUtils.clone(depthShader.uniforms);\n\n  _depthMaterial = new THREE.ShaderMaterial({\n    uniforms: depthUniforms,\n    vertexShader: depthShader.vertexShader,\n    fragmentShader: depthShader.fragmentShader });\n\n\n  _depthMaterialMorph = new THREE.ShaderMaterial({\n    uniforms: depthUniforms,\n    vertexShader: depthShader.vertexShader,\n    fragmentShader: depthShader.fragmentShader,\n    morphTargets: true });\n\n\n  _depthMaterialSkin = new THREE.ShaderMaterial({\n    uniforms: depthUniforms,\n    vertexShader: depthShader.vertexShader,\n    fragmentShader: depthShader.fragmentShader,\n    skinning: true });\n\n\n  _depthMaterialMorphSkin = new THREE.ShaderMaterial({\n    uniforms: depthUniforms,\n    vertexShader: depthShader.vertexShader,\n    fragmentShader: depthShader.fragmentShader,\n    morphTargets: true,\n    skinning: true });\n\n\n  _depthMaterial._shadowPass = true;\n  _depthMaterialMorph._shadowPass = true;\n  _depthMaterialSkin._shadowPass = true;\n  _depthMaterialMorphSkin._shadowPass = true;\n\n  this.render = function (scene, camera) {\n\n    if (_renderer.shadowMapEnabled === false) return;\n\n    var i,il,j,jl,n,\n\n    shadowMap,shadowMatrix,shadowCamera,\n    buffer,material,\n    webglObject,object,light,\n\n    lights = [],\n    k = 0,\n\n    fog = null;\n\n    // set GL state for depth map\n\n    _gl.clearColor(1, 1, 1, 1);\n    _gl.disable(_gl.BLEND);\n\n    _gl.enable(_gl.CULL_FACE);\n    _gl.frontFace(_gl.CCW);\n\n    if (_renderer.shadowMapCullFace === THREE.CullFaceFront) {\n\n      _gl.cullFace(_gl.FRONT);\n\n    } else {\n\n      _gl.cullFace(_gl.BACK);\n\n    }\n\n    _renderer.state.setDepthTest(true);\n\n    // preprocess lights\n    // \t- skip lights that are not casting shadows\n    //\t- create virtual lights for cascaded shadow maps\n\n    for (i = 0, il = _lights.length; i < il; i++) {\n\n      light = _lights[i];\n\n      if (!light.castShadow) continue;\n\n      if (light instanceof THREE.DirectionalLight && light.shadowCascade) {\n\n        for (n = 0; n < light.shadowCascadeCount; n++) {\n\n          var virtualLight;\n\n          if (!light.shadowCascadeArray[n]) {\n\n            virtualLight = createVirtualLight(light, n);\n            virtualLight.originalCamera = camera;\n\n            var gyro = new THREE.Gyroscope();\n            gyro.position.copy(light.shadowCascadeOffset);\n\n            gyro.add(virtualLight);\n            gyro.add(virtualLight.target);\n\n            camera.add(gyro);\n\n            light.shadowCascadeArray[n] = virtualLight;\n\n            //console.log( \"Created virtualLight\", virtualLight );\n\n          } else {\n\n            virtualLight = light.shadowCascadeArray[n];\n\n          }\n\n          updateVirtualLight(light, n);\n\n          lights[k] = virtualLight;\n          k++;\n\n        }\n\n      } else {\n\n        lights[k] = light;\n        k++;\n\n      }\n\n    }\n\n    // render depth map\n\n    for (i = 0, il = lights.length; i < il; i++) {\n\n      light = lights[i];\n\n      if (!light.shadowMap) {\n\n        var shadowFilter = THREE.LinearFilter;\n\n        if (_renderer.shadowMapType === THREE.PCFSoftShadowMap) {\n\n          shadowFilter = THREE.NearestFilter;\n\n        }\n\n        var pars = { minFilter: shadowFilter, magFilter: shadowFilter, format: THREE.RGBAFormat };\n\n        light.shadowMap = new THREE.WebGLRenderTarget(light.shadowMapWidth, light.shadowMapHeight, pars);\n        light.shadowMapSize = new THREE.Vector2(light.shadowMapWidth, light.shadowMapHeight);\n\n        light.shadowMatrix = new THREE.Matrix4();\n\n      }\n\n      if (!light.shadowCamera) {\n\n        if (light instanceof THREE.SpotLight) {\n\n          light.shadowCamera = new THREE.PerspectiveCamera(light.shadowCameraFov, light.shadowMapWidth / light.shadowMapHeight, light.shadowCameraNear, light.shadowCameraFar);\n\n        } else if (light instanceof THREE.DirectionalLight) {\n\n          light.shadowCamera = new THREE.OrthographicCamera(light.shadowCameraLeft, light.shadowCameraRight, light.shadowCameraTop, light.shadowCameraBottom, light.shadowCameraNear, light.shadowCameraFar);\n\n        } else {\n\n          THREE.error(\"THREE.ShadowMapPlugin: Unsupported light type for shadow\", light);\n          continue;\n\n        }\n\n        scene.add(light.shadowCamera);\n\n        if (scene.autoUpdate === true) scene.updateMatrixWorld();\n\n      }\n\n      if (light.shadowCameraVisible && !light.cameraHelper) {\n\n        light.cameraHelper = new THREE.CameraHelper(light.shadowCamera);\n        scene.add(light.cameraHelper);\n\n      }\n\n      if (light.isVirtual && virtualLight.originalCamera == camera) {\n\n        updateShadowCamera(camera, light);\n\n      }\n\n      shadowMap = light.shadowMap;\n      shadowMatrix = light.shadowMatrix;\n      shadowCamera = light.shadowCamera;\n\n      //\n\n      shadowCamera.position.setFromMatrixPosition(light.matrixWorld);\n      _matrixPosition.setFromMatrixPosition(light.target.matrixWorld);\n      shadowCamera.lookAt(_matrixPosition);\n      shadowCamera.updateMatrixWorld();\n\n      shadowCamera.matrixWorldInverse.getInverse(shadowCamera.matrixWorld);\n\n      //\n\n      if (light.cameraHelper) light.cameraHelper.visible = light.shadowCameraVisible;\n      if (light.shadowCameraVisible) light.cameraHelper.update();\n\n      // compute shadow matrix\n\n      shadowMatrix.set(\n      0.5, 0.0, 0.0, 0.5,\n      0.0, 0.5, 0.0, 0.5,\n      0.0, 0.0, 0.5, 0.5,\n      0.0, 0.0, 0.0, 1.0);\n\n\n      shadowMatrix.multiply(shadowCamera.projectionMatrix);\n      shadowMatrix.multiply(shadowCamera.matrixWorldInverse);\n\n      // update camera matrices and frustum\n\n      _projScreenMatrix.multiplyMatrices(shadowCamera.projectionMatrix, shadowCamera.matrixWorldInverse);\n      _frustum.setFromMatrix(_projScreenMatrix);\n\n      // render shadow map\n\n      _renderer.setRenderTarget(shadowMap);\n      _renderer.clear();\n\n      // set object matrices & frustum culling\n\n      _renderList.length = 0;\n\n      projectObject(scene, scene, shadowCamera);\n\n\n      // render regular objects\n\n      var objectMaterial, useMorphing, useSkinning;\n\n      for (j = 0, jl = _renderList.length; j < jl; j++) {\n\n        webglObject = _renderList[j];\n\n        object = webglObject.object;\n        buffer = webglObject.buffer;\n\n        // culling is overriden globally for all objects\n        // while rendering depth map\n\n        // need to deal with MeshFaceMaterial somehow\n        // in that case just use the first of material.materials for now\n        // (proper solution would require to break objects by materials\n        //  similarly to regular rendering and then set corresponding\n        //  depth materials per each chunk instead of just once per object)\n\n        objectMaterial = getObjectMaterial(object);\n\n        useMorphing = object.geometry.morphTargets !== undefined && object.geometry.morphTargets.length > 0 && objectMaterial.morphTargets;\n        useSkinning = object instanceof THREE.SkinnedMesh && objectMaterial.skinning;\n\n        if (object.customDepthMaterial) {\n\n          material = object.customDepthMaterial;\n\n        } else if (useSkinning) {\n\n          material = useMorphing ? _depthMaterialMorphSkin : _depthMaterialSkin;\n\n        } else if (useMorphing) {\n\n          material = _depthMaterialMorph;\n\n        } else {\n\n          material = _depthMaterial;\n\n        }\n\n        _renderer.setMaterialFaces(objectMaterial);\n\n        if (buffer instanceof THREE.BufferGeometry) {\n\n          _renderer.renderBufferDirect(shadowCamera, _lights, fog, material, buffer, object);\n\n        } else {\n\n          _renderer.renderBuffer(shadowCamera, _lights, fog, material, buffer, object);\n\n        }\n\n      }\n\n      // set matrices and render immediate objects\n\n      for (j = 0, jl = _webglObjectsImmediate.length; j < jl; j++) {\n\n        webglObject = _webglObjectsImmediate[j];\n        object = webglObject.object;\n\n        if (object.visible && object.castShadow) {\n\n          object._modelViewMatrix.multiplyMatrices(shadowCamera.matrixWorldInverse, object.matrixWorld);\n\n          _renderer.renderImmediateObject(shadowCamera, _lights, fog, _depthMaterial, object);\n\n        }\n\n      }\n\n    }\n\n    // restore GL state\n\n    var clearColor = _renderer.getClearColor(),\n    clearAlpha = _renderer.getClearAlpha();\n\n    _gl.clearColor(clearColor.r, clearColor.g, clearColor.b, clearAlpha);\n    _gl.enable(_gl.BLEND);\n\n    if (_renderer.shadowMapCullFace === THREE.CullFaceFront) {\n\n      _gl.cullFace(_gl.BACK);\n\n    }\n\n    _renderer.resetGLState();\n\n  };\n\n  function projectObject(scene, object, shadowCamera) {\n\n    if (object.visible) {\n\n      var webglObjects = _webglObjects[object.id];\n\n      if (webglObjects && object.castShadow && (object.frustumCulled === false || _frustum.intersectsObject(object) === true)) {\n\n        for (var i = 0, l = webglObjects.length; i < l; i++) {\n\n          var webglObject = webglObjects[i];\n\n          object._modelViewMatrix.multiplyMatrices(shadowCamera.matrixWorldInverse, object.matrixWorld);\n          _renderList.push(webglObject);\n\n        }\n\n      }\n\n      for (var i = 0, l = object.children.length; i < l; i++) {\n\n        projectObject(scene, object.children[i], shadowCamera);\n\n      }\n\n    }\n\n  }\n\n  function createVirtualLight(light, cascade) {\n\n    var virtualLight = new THREE.DirectionalLight();\n\n    virtualLight.isVirtual = true;\n\n    virtualLight.onlyShadow = true;\n    virtualLight.castShadow = true;\n\n    virtualLight.shadowCameraNear = light.shadowCameraNear;\n    virtualLight.shadowCameraFar = light.shadowCameraFar;\n\n    virtualLight.shadowCameraLeft = light.shadowCameraLeft;\n    virtualLight.shadowCameraRight = light.shadowCameraRight;\n    virtualLight.shadowCameraBottom = light.shadowCameraBottom;\n    virtualLight.shadowCameraTop = light.shadowCameraTop;\n\n    virtualLight.shadowCameraVisible = light.shadowCameraVisible;\n\n    virtualLight.shadowDarkness = light.shadowDarkness;\n\n    virtualLight.shadowBias = light.shadowCascadeBias[cascade];\n    virtualLight.shadowMapWidth = light.shadowCascadeWidth[cascade];\n    virtualLight.shadowMapHeight = light.shadowCascadeHeight[cascade];\n\n    virtualLight.pointsWorld = [];\n    virtualLight.pointsFrustum = [];\n\n    var pointsWorld = virtualLight.pointsWorld,\n    pointsFrustum = virtualLight.pointsFrustum;\n\n    for (var i = 0; i < 8; i++) {\n\n      pointsWorld[i] = new THREE.Vector3();\n      pointsFrustum[i] = new THREE.Vector3();\n\n    }\n\n    var nearZ = light.shadowCascadeNearZ[cascade];\n    var farZ = light.shadowCascadeFarZ[cascade];\n\n    pointsFrustum[0].set(-1, -1, nearZ);\n    pointsFrustum[1].set(1, -1, nearZ);\n    pointsFrustum[2].set(-1, 1, nearZ);\n    pointsFrustum[3].set(1, 1, nearZ);\n\n    pointsFrustum[4].set(-1, -1, farZ);\n    pointsFrustum[5].set(1, -1, farZ);\n    pointsFrustum[6].set(-1, 1, farZ);\n    pointsFrustum[7].set(1, 1, farZ);\n\n    return virtualLight;\n\n  }\n\n  // Synchronize virtual light with the original light\n\n  function updateVirtualLight(light, cascade) {\n\n    var virtualLight = light.shadowCascadeArray[cascade];\n\n    virtualLight.position.copy(light.position);\n    virtualLight.target.position.copy(light.target.position);\n    virtualLight.lookAt(virtualLight.target);\n\n    virtualLight.shadowCameraVisible = light.shadowCameraVisible;\n    virtualLight.shadowDarkness = light.shadowDarkness;\n\n    virtualLight.shadowBias = light.shadowCascadeBias[cascade];\n\n    var nearZ = light.shadowCascadeNearZ[cascade];\n    var farZ = light.shadowCascadeFarZ[cascade];\n\n    var pointsFrustum = virtualLight.pointsFrustum;\n\n    pointsFrustum[0].z = nearZ;\n    pointsFrustum[1].z = nearZ;\n    pointsFrustum[2].z = nearZ;\n    pointsFrustum[3].z = nearZ;\n\n    pointsFrustum[4].z = farZ;\n    pointsFrustum[5].z = farZ;\n    pointsFrustum[6].z = farZ;\n    pointsFrustum[7].z = farZ;\n\n  }\n\n  // Fit shadow camera's ortho frustum to camera frustum\n\n  function updateShadowCamera(camera, light) {\n\n    var shadowCamera = light.shadowCamera,\n    pointsFrustum = light.pointsFrustum,\n    pointsWorld = light.pointsWorld;\n\n    _min.set(Infinity, Infinity, Infinity);\n    _max.set(-Infinity, -Infinity, -Infinity);\n\n    for (var i = 0; i < 8; i++) {\n\n      var p = pointsWorld[i];\n\n      p.copy(pointsFrustum[i]);\n      p.unproject(camera);\n\n      p.applyMatrix4(shadowCamera.matrixWorldInverse);\n\n      if (p.x < _min.x) _min.x = p.x;\n      if (p.x > _max.x) _max.x = p.x;\n\n      if (p.y < _min.y) _min.y = p.y;\n      if (p.y > _max.y) _max.y = p.y;\n\n      if (p.z < _min.z) _min.z = p.z;\n      if (p.z > _max.z) _max.z = p.z;\n\n    }\n\n    shadowCamera.left = _min.x;\n    shadowCamera.right = _max.x;\n    shadowCamera.top = _max.y;\n    shadowCamera.bottom = _min.y;\n\n    // can't really fit near/far\n    //shadowCamera.near = _min.z;\n    //shadowCamera.far = _max.z;\n\n    shadowCamera.updateProjectionMatrix();\n\n  }\n\n  // For the moment just ignore objects that have multiple materials with different animation methods\n  // Only the first material will be taken into account for deciding which depth material to use for shadow maps\n\n  function getObjectMaterial(object) {\n\n    return object.material instanceof THREE.MeshFaceMaterial ?\n    object.material.materials[0] :\n    object.material;\n\n  };\n\n};\n\n// File:src/renderers/webgl/plugins/SpritePlugin.js\n\n/**\n * @author mikael emtinger / http://gomo.se/\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.SpritePlugin = function (renderer, sprites) {\n\n  var gl = renderer.context;\n\n  var vertexBuffer, elementBuffer;\n  var program, attributes, uniforms;\n\n  var texture;\n\n  // decompose matrixWorld\n\n  var spritePosition = new THREE.Vector3();\n  var spriteRotation = new THREE.Quaternion();\n  var spriteScale = new THREE.Vector3();\n\n  var init = function init() {\n\n    var vertices = new Float32Array([\n    -0.5, -0.5, 0, 0,\n    0.5, -0.5, 1, 0,\n    0.5, 0.5, 1, 1,\n    -0.5, 0.5, 0, 1]);\n\n\n    var faces = new Uint16Array([\n    0, 1, 2,\n    0, 2, 3]);\n\n\n    vertexBuffer = gl.createBuffer();\n    elementBuffer = gl.createBuffer();\n\n    gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer);\n    gl.bufferData(gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW);\n\n    gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, elementBuffer);\n    gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, faces, gl.STATIC_DRAW);\n\n    program = createProgram();\n\n    attributes = {\n      position: gl.getAttribLocation(program, 'position'),\n      uv: gl.getAttribLocation(program, 'uv') };\n\n\n    uniforms = {\n      uvOffset: gl.getUniformLocation(program, 'uvOffset'),\n      uvScale: gl.getUniformLocation(program, 'uvScale'),\n\n      rotation: gl.getUniformLocation(program, 'rotation'),\n      scale: gl.getUniformLocation(program, 'scale'),\n\n      color: gl.getUniformLocation(program, 'color'),\n      map: gl.getUniformLocation(program, 'map'),\n      opacity: gl.getUniformLocation(program, 'opacity'),\n\n      modelViewMatrix: gl.getUniformLocation(program, 'modelViewMatrix'),\n      projectionMatrix: gl.getUniformLocation(program, 'projectionMatrix'),\n\n      fogType: gl.getUniformLocation(program, 'fogType'),\n      fogDensity: gl.getUniformLocation(program, 'fogDensity'),\n      fogNear: gl.getUniformLocation(program, 'fogNear'),\n      fogFar: gl.getUniformLocation(program, 'fogFar'),\n      fogColor: gl.getUniformLocation(program, 'fogColor'),\n\n      alphaTest: gl.getUniformLocation(program, 'alphaTest') };\n\n\n    var canvas = document.createElement('canvas');\n    canvas.width = 8;\n    canvas.height = 8;\n\n    var context = canvas.getContext('2d');\n    context.fillStyle = 'white';\n    context.fillRect(0, 0, 8, 8);\n\n    texture = new THREE.Texture(canvas);\n    texture.needsUpdate = true;\n\n  };\n\n  this.render = function (scene, camera) {\n\n    if (sprites.length === 0) return;\n\n    // setup gl\n\n    if (program === undefined) {\n\n      init();\n\n    }\n\n    gl.useProgram(program);\n\n    gl.enableVertexAttribArray(attributes.position);\n    gl.enableVertexAttribArray(attributes.uv);\n\n    gl.disable(gl.CULL_FACE);\n    gl.enable(gl.BLEND);\n\n    gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer);\n    gl.vertexAttribPointer(attributes.position, 2, gl.FLOAT, false, 2 * 8, 0);\n    gl.vertexAttribPointer(attributes.uv, 2, gl.FLOAT, false, 2 * 8, 8);\n\n    gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, elementBuffer);\n\n    gl.uniformMatrix4fv(uniforms.projectionMatrix, false, camera.projectionMatrix.elements);\n\n    gl.activeTexture(gl.TEXTURE0);\n    gl.uniform1i(uniforms.map, 0);\n\n    var oldFogType = 0;\n    var sceneFogType = 0;\n    var fog = scene.fog;\n\n    if (fog) {\n\n      gl.uniform3f(uniforms.fogColor, fog.color.r, fog.color.g, fog.color.b);\n\n      if (fog instanceof THREE.Fog) {\n\n        gl.uniform1f(uniforms.fogNear, fog.near);\n        gl.uniform1f(uniforms.fogFar, fog.far);\n\n        gl.uniform1i(uniforms.fogType, 1);\n        oldFogType = 1;\n        sceneFogType = 1;\n\n      } else if (fog instanceof THREE.FogExp2) {\n\n        gl.uniform1f(uniforms.fogDensity, fog.density);\n\n        gl.uniform1i(uniforms.fogType, 2);\n        oldFogType = 2;\n        sceneFogType = 2;\n\n      }\n\n    } else {\n\n      gl.uniform1i(uniforms.fogType, 0);\n      oldFogType = 0;\n      sceneFogType = 0;\n\n    }\n\n\n    // update positions and sort\n\n    for (var i = 0, l = sprites.length; i < l; i++) {\n\n      var sprite = sprites[i];\n\n      sprite._modelViewMatrix.multiplyMatrices(camera.matrixWorldInverse, sprite.matrixWorld);\n      sprite.z = -sprite._modelViewMatrix.elements[14];\n\n    }\n\n    sprites.sort(painterSortStable);\n\n    // render all sprites\n\n    var scale = [];\n\n    for (var i = 0, l = sprites.length; i < l; i++) {\n\n      var sprite = sprites[i];\n      var material = sprite.material;\n\n      gl.uniform1f(uniforms.alphaTest, material.alphaTest);\n      gl.uniformMatrix4fv(uniforms.modelViewMatrix, false, sprite._modelViewMatrix.elements);\n\n      sprite.matrixWorld.decompose(spritePosition, spriteRotation, spriteScale);\n\n      scale[0] = spriteScale.x;\n      scale[1] = spriteScale.y;\n\n      var fogType = 0;\n\n      if (scene.fog && material.fog) {\n\n        fogType = sceneFogType;\n\n      }\n\n      if (oldFogType !== fogType) {\n\n        gl.uniform1i(uniforms.fogType, fogType);\n        oldFogType = fogType;\n\n      }\n\n      if (material.map !== null) {\n\n        gl.uniform2f(uniforms.uvOffset, material.map.offset.x, material.map.offset.y);\n        gl.uniform2f(uniforms.uvScale, material.map.repeat.x, material.map.repeat.y);\n\n      } else {\n\n        gl.uniform2f(uniforms.uvOffset, 0, 0);\n        gl.uniform2f(uniforms.uvScale, 1, 1);\n\n      }\n\n      gl.uniform1f(uniforms.opacity, material.opacity);\n      gl.uniform3f(uniforms.color, material.color.r, material.color.g, material.color.b);\n\n      gl.uniform1f(uniforms.rotation, material.rotation);\n      gl.uniform2fv(uniforms.scale, scale);\n\n      renderer.state.setBlending(material.blending, material.blendEquation, material.blendSrc, material.blendDst);\n      renderer.state.setDepthTest(material.depthTest);\n      renderer.state.setDepthWrite(material.depthWrite);\n\n      if (material.map && material.map.image && material.map.image.width) {\n\n        renderer.setTexture(material.map, 0);\n\n      } else {\n\n        renderer.setTexture(texture, 0);\n\n      }\n\n      gl.drawElements(gl.TRIANGLES, 6, gl.UNSIGNED_SHORT, 0);\n\n    }\n\n    // restore gl\n\n    gl.enable(gl.CULL_FACE);\n\n    renderer.resetGLState();\n\n  };\n\n  function createProgram() {\n\n    var program = gl.createProgram();\n\n    var vertexShader = gl.createShader(gl.VERTEX_SHADER);\n    var fragmentShader = gl.createShader(gl.FRAGMENT_SHADER);\n\n    gl.shaderSource(vertexShader, [\n\n    'precision ' + renderer.getPrecision() + ' float;',\n\n    'uniform mat4 modelViewMatrix;',\n    'uniform mat4 projectionMatrix;',\n    'uniform float rotation;',\n    'uniform vec2 scale;',\n    'uniform vec2 uvOffset;',\n    'uniform vec2 uvScale;',\n\n    'attribute vec2 position;',\n    'attribute vec2 uv;',\n\n    'varying vec2 vUV;',\n\n    'void main() {',\n\n    'vUV = uvOffset + uv * uvScale;',\n\n    'vec2 alignedPosition = position * scale;',\n\n    'vec2 rotatedPosition;',\n    'rotatedPosition.x = cos( rotation ) * alignedPosition.x - sin( rotation ) * alignedPosition.y;',\n    'rotatedPosition.y = sin( rotation ) * alignedPosition.x + cos( rotation ) * alignedPosition.y;',\n\n    'vec4 finalPosition;',\n\n    'finalPosition = modelViewMatrix * vec4( 0.0, 0.0, 0.0, 1.0 );',\n    'finalPosition.xy += rotatedPosition;',\n    'finalPosition = projectionMatrix * finalPosition;',\n\n    'gl_Position = finalPosition;',\n\n    '}'].\n\n    join('\\n'));\n\n    gl.shaderSource(fragmentShader, [\n\n    'precision ' + renderer.getPrecision() + ' float;',\n\n    'uniform vec3 color;',\n    'uniform sampler2D map;',\n    'uniform float opacity;',\n\n    'uniform int fogType;',\n    'uniform vec3 fogColor;',\n    'uniform float fogDensity;',\n    'uniform float fogNear;',\n    'uniform float fogFar;',\n    'uniform float alphaTest;',\n\n    'varying vec2 vUV;',\n\n    'void main() {',\n\n    'vec4 texture = texture2D( map, vUV );',\n\n    'if ( texture.a < alphaTest ) discard;',\n\n    'gl_FragColor = vec4( color * texture.xyz, texture.a * opacity );',\n\n    'if ( fogType > 0 ) {',\n\n    'float depth = gl_FragCoord.z / gl_FragCoord.w;',\n    'float fogFactor = 0.0;',\n\n    'if ( fogType == 1 ) {',\n\n    'fogFactor = smoothstep( fogNear, fogFar, depth );',\n\n    '} else {',\n\n    'const float LOG2 = 1.442695;',\n    'float fogFactor = exp2( - fogDensity * fogDensity * depth * depth * LOG2 );',\n    'fogFactor = 1.0 - clamp( fogFactor, 0.0, 1.0 );',\n\n    '}',\n\n    'gl_FragColor = mix( gl_FragColor, vec4( fogColor, gl_FragColor.w ), fogFactor );',\n\n    '}',\n\n    '}'].\n\n    join('\\n'));\n\n    gl.compileShader(vertexShader);\n    gl.compileShader(fragmentShader);\n\n    gl.attachShader(program, vertexShader);\n    gl.attachShader(program, fragmentShader);\n\n    gl.linkProgram(program);\n\n    return program;\n\n  };\n\n  function painterSortStable(a, b) {\n\n    if (a.z !== b.z) {\n\n      return b.z - a.z;\n\n    } else {\n\n      return b.id - a.id;\n\n    }\n\n  };\n\n};\n\n// File:src/extras/GeometryUtils.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.GeometryUtils = {\n\n  merge: function merge(geometry1, geometry2, materialIndexOffset) {\n\n    THREE.warn('THREE.GeometryUtils: .merge() has been moved to Geometry. Use geometry.merge( geometry2, matrix, materialIndexOffset ) instead.');\n\n    var matrix;\n\n    if (geometry2 instanceof THREE.Mesh) {\n\n      geometry2.matrixAutoUpdate && geometry2.updateMatrix();\n\n      matrix = geometry2.matrix;\n      geometry2 = geometry2.geometry;\n\n    }\n\n    geometry1.merge(geometry2, matrix, materialIndexOffset);\n\n  },\n\n  center: function center(geometry) {\n\n    THREE.warn('THREE.GeometryUtils: .center() has been moved to Geometry. Use geometry.center() instead.');\n    return geometry.center();\n\n  } };\n\n\n\n// File:src/extras/ImageUtils.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n * @author mrdoob / http://mrdoob.com/\n * @author Daosheng Mu / https://github.com/DaoshengMu/\n */\n\nTHREE.ImageUtils = {\n\n  crossOrigin: undefined,\n\n  loadTexture: function loadTexture(url, mapping, onLoad, onError) {\n\n    var loader = new THREE.ImageLoader();\n    loader.crossOrigin = this.crossOrigin;\n\n    var texture = new THREE.Texture(undefined, mapping);\n\n    loader.load(url, function (image) {\n\n      texture.image = image;\n      texture.needsUpdate = true;\n\n      if (onLoad) onLoad(texture);\n\n    }, undefined, function (event) {\n\n      if (onError) onError(event);\n\n    });\n\n    texture.sourceFile = url;\n\n    return texture;\n\n  },\n\n  loadTextureCube: function loadTextureCube(array, mapping, onLoad, onError) {\n\n    var images = [];\n\n    var loader = new THREE.ImageLoader();\n    loader.crossOrigin = this.crossOrigin;\n\n    var texture = new THREE.CubeTexture(images, mapping);\n\n    // no flipping needed for cube textures\n\n    texture.flipY = false;\n\n    var loaded = 0;\n\n    var loadTexture = function loadTexture(i) {\n\n      loader.load(array[i], function (image) {\n\n        texture.images[i] = image;\n\n        loaded += 1;\n\n        if (loaded === 6) {\n\n          texture.needsUpdate = true;\n\n          if (onLoad) onLoad(texture);\n\n        }\n\n      }, undefined, onError);\n\n    };\n\n    for (var i = 0, il = array.length; i < il; ++i) {\n\n      loadTexture(i);\n\n    }\n\n    return texture;\n\n  },\n\n  loadCompressedTexture: function loadCompressedTexture() {\n\n    THREE.error('THREE.ImageUtils.loadCompressedTexture has been removed. Use THREE.DDSLoader instead.');\n\n  },\n\n  loadCompressedTextureCube: function loadCompressedTextureCube() {\n\n    THREE.error('THREE.ImageUtils.loadCompressedTextureCube has been removed. Use THREE.DDSLoader instead.');\n\n  },\n\n  getNormalMap: function getNormalMap(image, depth) {\n\n    // Adapted from http://www.paulbrunt.co.uk/lab/heightnormal/\n\n    var cross = function cross(a, b) {\n\n      return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]];\n\n    };\n\n    var subtract = function subtract(a, b) {\n\n      return [a[0] - b[0], a[1] - b[1], a[2] - b[2]];\n\n    };\n\n    var normalize = function normalize(a) {\n\n      var l = Math.sqrt(a[0] * a[0] + a[1] * a[1] + a[2] * a[2]);\n      return [a[0] / l, a[1] / l, a[2] / l];\n\n    };\n\n    depth = depth | 1;\n\n    var width = image.width;\n    var height = image.height;\n\n    var canvas = document.createElement('canvas');\n    canvas.width = width;\n    canvas.height = height;\n\n    var context = canvas.getContext('2d');\n    context.drawImage(image, 0, 0);\n\n    var data = context.getImageData(0, 0, width, height).data;\n    var imageData = context.createImageData(width, height);\n    var output = imageData.data;\n\n    for (var x = 0; x < width; x++) {\n\n      for (var y = 0; y < height; y++) {\n\n        var ly = y - 1 < 0 ? 0 : y - 1;\n        var uy = y + 1 > height - 1 ? height - 1 : y + 1;\n        var lx = x - 1 < 0 ? 0 : x - 1;\n        var ux = x + 1 > width - 1 ? width - 1 : x + 1;\n\n        var points = [];\n        var origin = [0, 0, data[(y * width + x) * 4] / 255 * depth];\n        points.push([-1, 0, data[(y * width + lx) * 4] / 255 * depth]);\n        points.push([-1, -1, data[(ly * width + lx) * 4] / 255 * depth]);\n        points.push([0, -1, data[(ly * width + x) * 4] / 255 * depth]);\n        points.push([1, -1, data[(ly * width + ux) * 4] / 255 * depth]);\n        points.push([1, 0, data[(y * width + ux) * 4] / 255 * depth]);\n        points.push([1, 1, data[(uy * width + ux) * 4] / 255 * depth]);\n        points.push([0, 1, data[(uy * width + x) * 4] / 255 * depth]);\n        points.push([-1, 1, data[(uy * width + lx) * 4] / 255 * depth]);\n\n        var normals = [];\n        var num_points = points.length;\n\n        for (var i = 0; i < num_points; i++) {\n\n          var v1 = points[i];\n          var v2 = points[(i + 1) % num_points];\n          v1 = subtract(v1, origin);\n          v2 = subtract(v2, origin);\n          normals.push(normalize(cross(v1, v2)));\n\n        }\n\n        var normal = [0, 0, 0];\n\n        for (var i = 0; i < normals.length; i++) {\n\n          normal[0] += normals[i][0];\n          normal[1] += normals[i][1];\n          normal[2] += normals[i][2];\n\n        }\n\n        normal[0] /= normals.length;\n        normal[1] /= normals.length;\n        normal[2] /= normals.length;\n\n        var idx = (y * width + x) * 4;\n\n        output[idx] = (normal[0] + 1.0) / 2.0 * 255 | 0;\n        output[idx + 1] = (normal[1] + 1.0) / 2.0 * 255 | 0;\n        output[idx + 2] = normal[2] * 255 | 0;\n        output[idx + 3] = 255;\n\n      }\n\n    }\n\n    context.putImageData(imageData, 0, 0);\n\n    return canvas;\n\n  },\n\n  generateDataTexture: function generateDataTexture(width, height, color) {\n\n    var size = width * height;\n    var data = new Uint8Array(3 * size);\n\n    var r = Math.floor(color.r * 255);\n    var g = Math.floor(color.g * 255);\n    var b = Math.floor(color.b * 255);\n\n    for (var i = 0; i < size; i++) {\n\n      data[i * 3] = r;\n      data[i * 3 + 1] = g;\n      data[i * 3 + 2] = b;\n\n    }\n\n    var texture = new THREE.DataTexture(data, width, height, THREE.RGBFormat);\n    texture.needsUpdate = true;\n\n    return texture;\n\n  } };\n\n\n\n// File:src/extras/SceneUtils.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.SceneUtils = {\n\n  createMultiMaterialObject: function createMultiMaterialObject(geometry, materials) {\n\n    var group = new THREE.Object3D();\n\n    for (var i = 0, l = materials.length; i < l; i++) {\n\n      group.add(new THREE.Mesh(geometry, materials[i]));\n\n    }\n\n    return group;\n\n  },\n\n  detach: function detach(child, parent, scene) {\n\n    child.applyMatrix(parent.matrixWorld);\n    parent.remove(child);\n    scene.add(child);\n\n  },\n\n  attach: function attach(child, scene, parent) {\n\n    var matrixWorldInverse = new THREE.Matrix4();\n    matrixWorldInverse.getInverse(parent.matrixWorld);\n    child.applyMatrix(matrixWorldInverse);\n\n    scene.remove(child);\n    parent.add(child);\n\n  } };\n\n\n\n// File:src/extras/FontUtils.js\n\n/**\n * @author zz85 / http://www.lab4games.net/zz85/blog\n * @author alteredq / http://alteredqualia.com/\n *\n * For Text operations in three.js (See TextGeometry)\n *\n * It uses techniques used in:\n *\n * \ttypeface.js and canvastext\n * \t\tFor converting fonts and rendering with javascript\n *\t\thttp://typeface.neocracy.org\n *\n *\tTriangulation ported from AS3\n *\t\tSimple Polygon Triangulation\n *\t\thttp://actionsnippet.com/?p=1462\n *\n * \tA Method to triangulate shapes with holes\n *\t\thttp://www.sakri.net/blog/2009/06/12/an-approach-to-triangulating-polygons-with-holes/\n *\n */\n\nTHREE.FontUtils = {\n\n  faces: {},\n\n  // Just for now. face[weight][style]\n\n  face: 'helvetiker',\n  weight: 'normal',\n  style: 'normal',\n  size: 150,\n  divisions: 10,\n\n  getFace: function getFace() {\n\n    try {\n\n      return this.faces[this.face][this.weight][this.style];\n\n    } catch (e) {\n\n      throw \"The font \" + this.face + \" with \" + this.weight + \" weight and \" + this.style + \" style is missing.\";\n\n    };\n\n  },\n\n  loadFace: function loadFace(data) {\n\n    var family = data.familyName.toLowerCase();\n\n    var ThreeFont = this;\n\n    ThreeFont.faces[family] = ThreeFont.faces[family] || {};\n\n    ThreeFont.faces[family][data.cssFontWeight] = ThreeFont.faces[family][data.cssFontWeight] || {};\n    ThreeFont.faces[family][data.cssFontWeight][data.cssFontStyle] = data;\n\n    ThreeFont.faces[family][data.cssFontWeight][data.cssFontStyle] = data;\n\n    return data;\n\n  },\n\n  drawText: function drawText(text) {\n\n    // RenderText\n\n    var i,\n    face = this.getFace(),\n    scale = this.size / face.resolution,\n    offset = 0,\n    chars = String(text).split(''),\n    length = chars.length;\n\n    var fontPaths = [];\n\n    for (i = 0; i < length; i++) {\n\n      var path = new THREE.Path();\n\n      var ret = this.extractGlyphPoints(chars[i], face, scale, offset, path);\n      offset += ret.offset;\n\n      fontPaths.push(ret.path);\n\n    }\n\n    // get the width\n\n    var width = offset / 2;\n    //\n    // for ( p = 0; p < allPts.length; p++ ) {\n    //\n    // \tallPts[ p ].x -= width;\n    //\n    // }\n\n    //var extract = this.extractPoints( allPts, characterPts );\n    //extract.contour = allPts;\n\n    //extract.paths = fontPaths;\n    //extract.offset = width;\n\n    return { paths: fontPaths, offset: width };\n\n  },\n\n\n\n\n  extractGlyphPoints: function extractGlyphPoints(c, face, scale, offset, path) {\n\n    var pts = [];\n\n    var i,i2,divisions,\n    outline,action,length,\n    scaleX,scaleY,\n    x,y,cpx,cpy,cpx0,cpy0,cpx1,cpy1,cpx2,cpy2,\n    laste,\n    glyph = face.glyphs[c] || face.glyphs['?'];\n\n    if (!glyph) return;\n\n    if (glyph.o) {\n\n      outline = glyph._cachedOutline || (glyph._cachedOutline = glyph.o.split(' '));\n      length = outline.length;\n\n      scaleX = scale;\n      scaleY = scale;\n\n      for (i = 0; i < length;) {\n\n        action = outline[i++];\n\n        //console.log( action );\n\n        switch (action) {\n\n          case 'm':\n\n            // Move To\n\n            x = outline[i++] * scaleX + offset;\n            y = outline[i++] * scaleY;\n\n            path.moveTo(x, y);\n            break;\n\n          case 'l':\n\n            // Line To\n\n            x = outline[i++] * scaleX + offset;\n            y = outline[i++] * scaleY;\n            path.lineTo(x, y);\n            break;\n\n          case 'q':\n\n            // QuadraticCurveTo\n\n            cpx = outline[i++] * scaleX + offset;\n            cpy = outline[i++] * scaleY;\n            cpx1 = outline[i++] * scaleX + offset;\n            cpy1 = outline[i++] * scaleY;\n\n            path.quadraticCurveTo(cpx1, cpy1, cpx, cpy);\n\n            laste = pts[pts.length - 1];\n\n            if (laste) {\n\n              cpx0 = laste.x;\n              cpy0 = laste.y;\n\n              for (i2 = 1, divisions = this.divisions; i2 <= divisions; i2++) {\n\n                var t = i2 / divisions;\n                THREE.Shape.Utils.b2(t, cpx0, cpx1, cpx);\n                THREE.Shape.Utils.b2(t, cpy0, cpy1, cpy);\n              }\n\n            }\n\n            break;\n\n          case 'b':\n\n            // Cubic Bezier Curve\n\n            cpx = outline[i++] * scaleX + offset;\n            cpy = outline[i++] * scaleY;\n            cpx1 = outline[i++] * scaleX + offset;\n            cpy1 = outline[i++] * scaleY;\n            cpx2 = outline[i++] * scaleX + offset;\n            cpy2 = outline[i++] * scaleY;\n\n            path.bezierCurveTo(cpx1, cpy1, cpx2, cpy2, cpx, cpy);\n\n            laste = pts[pts.length - 1];\n\n            if (laste) {\n\n              cpx0 = laste.x;\n              cpy0 = laste.y;\n\n              for (i2 = 1, divisions = this.divisions; i2 <= divisions; i2++) {\n\n                var t = i2 / divisions;\n                THREE.Shape.Utils.b3(t, cpx0, cpx1, cpx2, cpx);\n                THREE.Shape.Utils.b3(t, cpy0, cpy1, cpy2, cpy);\n\n              }\n\n            }\n\n            break;}\n\n\n\n      }\n    }\n\n\n\n    return { offset: glyph.ha * scale, path: path };\n  } };\n\n\n\n\nTHREE.FontUtils.generateShapes = function (text, parameters) {\n\n  // Parameters \n\n  parameters = parameters || {};\n\n  var size = parameters.size !== undefined ? parameters.size : 100;\n  var curveSegments = parameters.curveSegments !== undefined ? parameters.curveSegments : 4;\n\n  var font = parameters.font !== undefined ? parameters.font : 'helvetiker';\n  var weight = parameters.weight !== undefined ? parameters.weight : 'normal';\n  var style = parameters.style !== undefined ? parameters.style : 'normal';\n\n  THREE.FontUtils.size = size;\n  THREE.FontUtils.divisions = curveSegments;\n\n  THREE.FontUtils.face = font;\n  THREE.FontUtils.weight = weight;\n  THREE.FontUtils.style = style;\n\n  // Get a Font data json object\n\n  var data = THREE.FontUtils.drawText(text);\n\n  var paths = data.paths;\n  var shapes = [];\n\n  for (var p = 0, pl = paths.length; p < pl; p++) {\n\n    Array.prototype.push.apply(shapes, paths[p].toShapes());\n\n  }\n\n  return shapes;\n\n};\n\n\n/**\n    * This code is a quick port of code written in C++ which was submitted to\n    * flipcode.com by John W. Ratcliff  // July 22, 2000\n    * See original code and more information here:\n    * http://www.flipcode.com/archives/Efficient_Polygon_Triangulation.shtml\n    *\n    * ported to actionscript by Zevan Rosser\n    * www.actionsnippet.com\n    *\n    * ported to javascript by Joshua Koo\n    * http://www.lab4games.net/zz85/blog\n    *\n    */\n\n\n(function (namespace) {\n\n  var EPSILON = 0.0000000001;\n\n  // takes in an contour array and returns\n\n  var process = function process(contour, indices) {\n\n    var n = contour.length;\n\n    if (n < 3) return null;\n\n    var result = [],\n    verts = [],\n    vertIndices = [];\n\n    /* we want a counter-clockwise polygon in verts */\n\n    var u, v, w;\n\n    if (area(contour) > 0.0) {\n\n      for (v = 0; v < n; v++) {verts[v] = v;}\n\n    } else {\n\n      for (v = 0; v < n; v++) {verts[v] = n - 1 - v;}\n\n    }\n\n    var nv = n;\n\n    /*  remove nv - 2 vertices, creating 1 triangle every time */\n\n    var count = 2 * nv; /* error detection */\n\n    for (v = nv - 1; nv > 2;) {\n\n      /* if we loop, it is probably a non-simple polygon */\n\n      if (count-- <= 0) {\n\n        //** Triangulate: ERROR - probable bad polygon!\n\n        //throw ( \"Warning, unable to triangulate polygon!\" );\n        //return null;\n        // Sometimes warning is fine, especially polygons are triangulated in reverse.\n        THREE.warn('THREE.FontUtils: Warning, unable to triangulate polygon! in Triangulate.process()');\n\n        if (indices) return vertIndices;\n        return result;\n\n      }\n\n      /* three consecutive vertices in current polygon, <u,v,w> */\n\n      u = v;if (nv <= u) u = 0; /* previous */\n      v = u + 1;if (nv <= v) v = 0; /* new v    */\n      w = v + 1;if (nv <= w) w = 0; /* next     */\n\n      if (snip(contour, u, v, w, nv, verts)) {\n\n        var a, b, c, s, t;\n\n        /* true names of the vertices */\n\n        a = verts[u];\n        b = verts[v];\n        c = verts[w];\n\n        /* output Triangle */\n\n        result.push([contour[a],\n        contour[b],\n        contour[c]]);\n\n\n        vertIndices.push([verts[u], verts[v], verts[w]]);\n\n        /* remove v from the remaining polygon */\n\n        for (s = v, t = v + 1; t < nv; s++, t++) {\n\n          verts[s] = verts[t];\n\n        }\n\n        nv--;\n\n        /* reset error detection counter */\n\n        count = 2 * nv;\n\n      }\n\n    }\n\n    if (indices) return vertIndices;\n    return result;\n\n  };\n\n  // calculate area of the contour polygon\n\n  var area = function area(contour) {\n\n    var n = contour.length;\n    var a = 0.0;\n\n    for (var p = n - 1, q = 0; q < n; p = q++) {\n\n      a += contour[p].x * contour[q].y - contour[q].x * contour[p].y;\n\n    }\n\n    return a * 0.5;\n\n  };\n\n  var snip = function snip(contour, u, v, w, n, verts) {\n\n    var p;\n    var ax, ay, bx, by;\n    var cx, cy, px, py;\n\n    ax = contour[verts[u]].x;\n    ay = contour[verts[u]].y;\n\n    bx = contour[verts[v]].x;\n    by = contour[verts[v]].y;\n\n    cx = contour[verts[w]].x;\n    cy = contour[verts[w]].y;\n\n    if (EPSILON > (bx - ax) * (cy - ay) - (by - ay) * (cx - ax)) return false;\n\n    var aX, aY, bX, bY, cX, cY;\n    var apx, apy, bpx, bpy, cpx, cpy;\n    var cCROSSap, bCROSScp, aCROSSbp;\n\n    aX = cx - bx;aY = cy - by;\n    bX = ax - cx;bY = ay - cy;\n    cX = bx - ax;cY = by - ay;\n\n    for (p = 0; p < n; p++) {\n\n      px = contour[verts[p]].x;\n      py = contour[verts[p]].y;\n\n      if (px === ax && py === ay ||\n      px === bx && py === by ||\n      px === cx && py === cy) continue;\n\n      apx = px - ax;apy = py - ay;\n      bpx = px - bx;bpy = py - by;\n      cpx = px - cx;cpy = py - cy;\n\n      // see if p is inside triangle abc\n\n      aCROSSbp = aX * bpy - aY * bpx;\n      cCROSSap = cX * apy - cY * apx;\n      bCROSScp = bX * cpy - bY * cpx;\n\n      if (aCROSSbp >= -EPSILON && bCROSScp >= -EPSILON && cCROSSap >= -EPSILON) return false;\n\n    }\n\n    return true;\n\n  };\n\n\n  namespace.Triangulate = process;\n  namespace.Triangulate.area = area;\n\n  return namespace;\n\n})(THREE.FontUtils);\n\n// LMV-Patch [TS] Commented out for use in node-lmv\n// To use the typeface.js face files, hook up the API\n//self._typeface_js = { faces: THREE.FontUtils.faces, loadFace: THREE.FontUtils.loadFace };\n//THREE.typeface_js = self._typeface_js;\n\n// File:src/extras/audio/Audio.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.Audio = function (listener) {\n\n  THREE.Object3D.call(this);\n\n  this.type = 'Audio';\n\n  this.context = listener.context;\n  this.source = this.context.createBufferSource();\n  this.source.onended = this.onEnded.bind(this);\n\n  this.gain = this.context.createGain();\n  this.gain.connect(this.context.destination);\n\n  this.panner = this.context.createPanner();\n  this.panner.connect(this.gain);\n\n  this.autoplay = false;\n\n  this.startTime = 0;\n  this.isPlaying = false;\n\n};\n\nTHREE.Audio.prototype = Object.create(THREE.Object3D.prototype);\nTHREE.Audio.prototype.constructor = THREE.Audio;\n\nTHREE.Audio.prototype.load = function (file) {\n\n  var scope = this;\n\n  var request = new XMLHttpRequest();\n  request.open('GET', file, true);\n  request.responseType = 'arraybuffer';\n  request.onload = function (e) {\n\n    scope.context.decodeAudioData(this.response, function (buffer) {\n\n      scope.source.buffer = buffer;\n\n      if (scope.autoplay) scope.play();\n\n    });\n\n  };\n  request.send();\n\n  return this;\n\n};\n\nTHREE.Audio.prototype.play = function () {\n\n  if (this.isPlaying === true) {\n\n    THREE.warn('THREE.Audio: Audio is already playing.');\n    return;\n\n  }\n\n  var source = this.context.createBufferSource();\n\n  source.buffer = this.source.buffer;\n  source.loop = this.source.loop;\n  source.onended = this.source.onended;\n  source.connect(this.panner);\n  source.start(0, this.startTime);\n\n  this.isPlaying = true;\n\n  this.source = source;\n\n};\n\nTHREE.Audio.prototype.pause = function () {\n\n  this.source.stop();\n  this.startTime = this.context.currentTime;\n\n};\n\nTHREE.Audio.prototype.stop = function () {\n\n  this.source.stop();\n  this.startTime = 0;\n\n};\n\nTHREE.Audio.prototype.onEnded = function () {\n\n  this.isPlaying = false;\n\n};\n\nTHREE.Audio.prototype.setLoop = function (value) {\n\n  this.source.loop = value;\n\n};\n\nTHREE.Audio.prototype.setRefDistance = function (value) {\n\n  this.panner.refDistance = value;\n\n};\n\nTHREE.Audio.prototype.setRolloffFactor = function (value) {\n\n  this.panner.rolloffFactor = value;\n\n};\n\nTHREE.Audio.prototype.setVolume = function (value) {\n\n  this.gain.gain.value = value;\n\n};\n\nTHREE.Audio.prototype.updateMatrixWorld = function () {\n\n  var position = new THREE.Vector3();\n\n  return function (force) {\n\n    THREE.Object3D.prototype.updateMatrixWorld.call(this, force);\n\n    position.setFromMatrixPosition(this.matrixWorld);\n\n    this.panner.setPosition(position.x, position.y, position.z);\n\n  };\n\n}();\n\n// File:src/extras/audio/AudioListener.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.AudioListener = function () {\n\n  THREE.Object3D.call(this);\n\n  this.type = 'AudioListener';\n\n  this.context = new (window.AudioContext || window.webkitAudioContext)();\n\n};\n\nTHREE.AudioListener.prototype = Object.create(THREE.Object3D.prototype);\nTHREE.AudioListener.prototype.constructor = THREE.AudioListener;\n\nTHREE.AudioListener.prototype.updateMatrixWorld = function () {\n\n  var position = new THREE.Vector3();\n  var quaternion = new THREE.Quaternion();\n  var scale = new THREE.Vector3();\n\n  var orientation = new THREE.Vector3();\n  var velocity = new THREE.Vector3();\n\n  var positionPrev = new THREE.Vector3();\n\n  return function (force) {\n\n    THREE.Object3D.prototype.updateMatrixWorld.call(this, force);\n\n    var listener = this.context.listener;\n    var up = this.up;\n\n    this.matrixWorld.decompose(position, quaternion, scale);\n\n    orientation.set(0, 0, -1).applyQuaternion(quaternion);\n    velocity.subVectors(position, positionPrev);\n\n    listener.setPosition(position.x, position.y, position.z);\n    listener.setOrientation(orientation.x, orientation.y, orientation.z, up.x, up.y, up.z);\n    listener.setVelocity(velocity.x, velocity.y, velocity.z);\n\n    positionPrev.copy(position);\n\n  };\n\n}();\n\n// File:src/extras/core/Curve.js\n\n/**\n * @author zz85 / http://www.lab4games.net/zz85/blog\n * Extensible curve object\n *\n * Some common of Curve methods\n * .getPoint(t), getTangent(t)\n * .getPointAt(u), getTagentAt(u)\n * .getPoints(), .getSpacedPoints()\n * .getLength()\n * .updateArcLengths()\n *\n * This following classes subclasses THREE.Curve:\n *\n * -- 2d classes --\n * THREE.LineCurve\n * THREE.QuadraticBezierCurve\n * THREE.CubicBezierCurve\n * THREE.SplineCurve\n * THREE.ArcCurve\n * THREE.EllipseCurve\n *\n * -- 3d classes --\n * THREE.LineCurve3\n * THREE.QuadraticBezierCurve3\n * THREE.CubicBezierCurve3\n * THREE.SplineCurve3\n * THREE.ClosedSplineCurve3\n *\n * A series of curves can be represented as a THREE.CurvePath\n *\n **/\n\n/**************************************************************\n      *\tAbstract Curve base class\n      **************************************************************/\n\nTHREE.Curve = function () {\n\n};\n\n// Virtual base class method to overwrite and implement in subclasses\n//\t- t [0 .. 1]\n\nTHREE.Curve.prototype.getPoint = function (t) {\n\n  THREE.warn(\"THREE.Curve: Warning, getPoint() not implemented!\");\n  return null;\n\n};\n\n// Get point at relative position in curve according to arc length\n// - u [0 .. 1]\n\nTHREE.Curve.prototype.getPointAt = function (u) {\n\n  var t = this.getUtoTmapping(u);\n  return this.getPoint(t);\n\n};\n\n// Get sequence of points using getPoint( t )\n\nTHREE.Curve.prototype.getPoints = function (divisions) {\n\n  if (!divisions) divisions = 5;\n\n  var d,pts = [];\n\n  for (d = 0; d <= divisions; d++) {\n\n    pts.push(this.getPoint(d / divisions));\n\n  }\n\n  return pts;\n\n};\n\n// Get sequence of points using getPointAt( u )\n\nTHREE.Curve.prototype.getSpacedPoints = function (divisions) {\n\n  if (!divisions) divisions = 5;\n\n  var d,pts = [];\n\n  for (d = 0; d <= divisions; d++) {\n\n    pts.push(this.getPointAt(d / divisions));\n\n  }\n\n  return pts;\n\n};\n\n// Get total curve arc length\n\nTHREE.Curve.prototype.getLength = function () {\n\n  var lengths = this.getLengths();\n  return lengths[lengths.length - 1];\n\n};\n\n// Get list of cumulative segment lengths\n\nTHREE.Curve.prototype.getLengths = function (divisions) {\n\n  if (!divisions) divisions = this.__arcLengthDivisions ? this.__arcLengthDivisions : 200;\n\n  if (this.cacheArcLengths &&\n  this.cacheArcLengths.length == divisions + 1 &&\n  !this.needsUpdate) {\n\n    //console.log( \"cached\", this.cacheArcLengths );\n    return this.cacheArcLengths;\n\n  }\n\n  this.needsUpdate = false;\n\n  var cache = [];\n  var current,last = this.getPoint(0);\n  var p,sum = 0;\n\n  cache.push(0);\n\n  for (p = 1; p <= divisions; p++) {\n\n    current = this.getPoint(p / divisions);\n    sum += current.distanceTo(last);\n    cache.push(sum);\n    last = current;\n\n  }\n\n  this.cacheArcLengths = cache;\n\n  return cache; // { sums: cache, sum:sum }; Sum is in the last element.\n\n};\n\n\nTHREE.Curve.prototype.updateArcLengths = function () {\n  this.needsUpdate = true;\n  this.getLengths();\n};\n\n// Given u ( 0 .. 1 ), get a t to find p. This gives you points which are equi distance\n\nTHREE.Curve.prototype.getUtoTmapping = function (u, distance) {\n\n  var arcLengths = this.getLengths();\n\n  var i = 0,il = arcLengths.length;\n\n  var targetArcLength; // The targeted u distance value to get\n\n  if (distance) {\n\n    targetArcLength = distance;\n\n  } else {\n\n    targetArcLength = u * arcLengths[il - 1];\n\n  }\n\n  //var time = Date.now();\n\n  // binary search for the index with largest value smaller than target u distance\n\n  var low = 0,high = il - 1,comparison;\n\n  while (low <= high) {\n\n    i = Math.floor(low + (high - low) / 2); // less likely to overflow, though probably not issue here, JS doesn't really have integers, all numbers are floats\n\n    comparison = arcLengths[i] - targetArcLength;\n\n    if (comparison < 0) {\n\n      low = i + 1;\n\n    } else if (comparison > 0) {\n\n      high = i - 1;\n\n    } else {\n\n      high = i;\n      break;\n\n      // DONE\n\n    }\n\n  }\n\n  i = high;\n\n  //console.log('b' , i, low, high, Date.now()- time);\n\n  if (arcLengths[i] == targetArcLength) {\n\n    var t = i / (il - 1);\n    return t;\n\n  }\n\n  // we could get finer grain at lengths, or use simple interpolatation between two points\n\n  var lengthBefore = arcLengths[i];\n  var lengthAfter = arcLengths[i + 1];\n\n  var segmentLength = lengthAfter - lengthBefore;\n\n  // determine where we are between the 'before' and 'after' points\n\n  var segmentFraction = (targetArcLength - lengthBefore) / segmentLength;\n\n  // add that fractional amount to t\n\n  var t = (i + segmentFraction) / (il - 1);\n\n  return t;\n\n};\n\n// Returns a unit vector tangent at t\n// In case any sub curve does not implement its tangent derivation,\n// 2 points a small delta apart will be used to find its gradient\n// which seems to give a reasonable approximation\n\nTHREE.Curve.prototype.getTangent = function (t) {\n\n  var delta = 0.0001;\n  var t1 = t - delta;\n  var t2 = t + delta;\n\n  // Capping in case of danger\n\n  if (t1 < 0) t1 = 0;\n  if (t2 > 1) t2 = 1;\n\n  var pt1 = this.getPoint(t1);\n  var pt2 = this.getPoint(t2);\n\n  var vec = pt2.clone().sub(pt1);\n  return vec.normalize();\n\n};\n\n\nTHREE.Curve.prototype.getTangentAt = function (u) {\n\n  var t = this.getUtoTmapping(u);\n  return this.getTangent(t);\n\n};\n\n\n\n\n\n/**************************************************************\n    *\tUtils\n    **************************************************************/\n\nTHREE.Curve.Utils = {\n\n  tangentQuadraticBezier: function tangentQuadraticBezier(t, p0, p1, p2) {\n\n    return 2 * (1 - t) * (p1 - p0) + 2 * t * (p2 - p1);\n\n  },\n\n  // Puay Bing, thanks for helping with this derivative!\n\n  tangentCubicBezier: function tangentCubicBezier(t, p0, p1, p2, p3) {\n\n    return -3 * p0 * (1 - t) * (1 - t) +\n    3 * p1 * (1 - t) * (1 - t) - 6 * t * p1 * (1 - t) +\n    6 * t * p2 * (1 - t) - 3 * t * t * p2 +\n    3 * t * t * p3;\n\n  },\n\n  tangentSpline: function tangentSpline(t, p0, p1, p2, p3) {\n\n    // To check if my formulas are correct\n\n    var h00 = 6 * t * t - 6 * t; // derived from 2t^3 − 3t^2 + 1\n    var h10 = 3 * t * t - 4 * t + 1; // t^3 − 2t^2 + t\n    var h01 = -6 * t * t + 6 * t; // − 2t3 + 3t2\n    var h11 = 3 * t * t - 2 * t; // t3 − t2\n\n    return h00 + h10 + h01 + h11;\n\n  },\n\n  // Catmull-Rom\n\n  interpolate: function interpolate(p0, p1, p2, p3, t) {\n\n    var v0 = (p2 - p0) * 0.5;\n    var v1 = (p3 - p1) * 0.5;\n    var t2 = t * t;\n    var t3 = t * t2;\n    return (2 * p1 - 2 * p2 + v0 + v1) * t3 + (-3 * p1 + 3 * p2 - 2 * v0 - v1) * t2 + v0 * t + p1;\n\n  } };\n\n\n\n\n// TODO: Transformation for Curves?\n\n/**************************************************************\n *\t3D Curves\n **************************************************************/\n\n// A Factory method for creating new curve subclasses\n\nTHREE.Curve.create = function (constructor, getPointFunc) {\n\n  constructor.prototype = Object.create(THREE.Curve.prototype);\n  constructor.prototype.constructor = constructor;\n  constructor.prototype.getPoint = getPointFunc;\n\n  return constructor;\n\n};\n\n// File:src/extras/core/CurvePath.js\n\n/**\n * @author zz85 / http://www.lab4games.net/zz85/blog\n *\n **/\n\n/**************************************************************\n      *\tCurved Path - a curve path is simply a array of connected\n      *  curves, but retains the api of a curve\n      **************************************************************/\n\nTHREE.CurvePath = function () {\n\n  this.curves = [];\n  this.bends = [];\n\n  this.autoClose = false; // Automatically closes the path\n};\n\nTHREE.CurvePath.prototype = Object.create(THREE.Curve.prototype);\nTHREE.CurvePath.prototype.constructor = THREE.CurvePath;\n\nTHREE.CurvePath.prototype.add = function (curve) {\n\n  this.curves.push(curve);\n\n};\n\nTHREE.CurvePath.prototype.checkConnection = function () {\n  // TODO\n  // If the ending of curve is not connected to the starting\n  // or the next curve, then, this is not a real path\n};\n\nTHREE.CurvePath.prototype.closePath = function () {\n  // TODO Test\n  // and verify for vector3 (needs to implement equals)\n  // Add a line curve if start and end of lines are not connected\n  var startPoint = this.curves[0].getPoint(0);\n  var endPoint = this.curves[this.curves.length - 1].getPoint(1);\n\n  if (!startPoint.equals(endPoint)) {\n    this.curves.push(new THREE.LineCurve(endPoint, startPoint));\n  }\n\n};\n\n// To get accurate point with reference to\n// entire path distance at time t,\n// following has to be done:\n\n// 1. Length of each sub path have to be known\n// 2. Locate and identify type of curve\n// 3. Get t for the curve\n// 4. Return curve.getPointAt(t')\n\nTHREE.CurvePath.prototype.getPoint = function (t) {\n\n  var d = t * this.getLength();\n  var curveLengths = this.getCurveLengths();\n  var i = 0,diff,curve;\n\n  // To think about boundaries points.\n\n  while (i < curveLengths.length) {\n\n    if (curveLengths[i] >= d) {\n\n      diff = curveLengths[i] - d;\n      curve = this.curves[i];\n\n      var u = 1 - diff / curve.getLength();\n\n      return curve.getPointAt(u);\n\n    }\n\n    i++;\n\n  }\n\n  return null;\n\n  // loop where sum != 0, sum > d , sum+1 <d\n\n};\n\n/*\n   THREE.CurvePath.prototype.getTangent = function( t ) {\n   };*/\n\n\n// We cannot use the default THREE.Curve getPoint() with getLength() because in\n// THREE.Curve, getLength() depends on getPoint() but in THREE.CurvePath\n// getPoint() depends on getLength\n\nTHREE.CurvePath.prototype.getLength = function () {\n\n  var lens = this.getCurveLengths();\n  return lens[lens.length - 1];\n\n};\n\n// Compute lengths and cache them\n// We cannot overwrite getLengths() because UtoT mapping uses it.\n\nTHREE.CurvePath.prototype.getCurveLengths = function () {\n\n  // We use cache values if curves and cache array are same length\n\n  if (this.cacheLengths && this.cacheLengths.length == this.curves.length) {\n\n    return this.cacheLengths;\n\n  };\n\n  // Get length of subsurve\n  // Push sums into cached array\n\n  var lengths = [],sums = 0;\n  var i,il = this.curves.length;\n\n  for (i = 0; i < il; i++) {\n\n    sums += this.curves[i].getLength();\n    lengths.push(sums);\n\n  }\n\n  this.cacheLengths = lengths;\n\n  return lengths;\n\n};\n\n\n\n// Returns min and max coordinates\n\nTHREE.CurvePath.prototype.getBoundingBox = function () {\n\n  var points = this.getPoints();\n\n  var maxX, maxY, maxZ;\n  var minX, minY, minZ;\n\n  maxX = maxY = Number.NEGATIVE_INFINITY;\n  minX = minY = Number.POSITIVE_INFINITY;\n\n  var p, i, il, sum;\n\n  var v3 = points[0] instanceof THREE.Vector3;\n\n  sum = v3 ? new THREE.Vector3() : new THREE.Vector2();\n\n  for (i = 0, il = points.length; i < il; i++) {\n\n    p = points[i];\n\n    if (p.x > maxX) maxX = p.x;else\n    if (p.x < minX) minX = p.x;\n\n    if (p.y > maxY) maxY = p.y;else\n    if (p.y < minY) minY = p.y;\n\n    if (v3) {\n\n      if (p.z > maxZ) maxZ = p.z;else\n      if (p.z < minZ) minZ = p.z;\n\n    }\n\n    sum.add(p);\n\n  }\n\n  var ret = {\n\n    minX: minX,\n    minY: minY,\n    maxX: maxX,\n    maxY: maxY };\n\n\n\n  if (v3) {\n\n    ret.maxZ = maxZ;\n    ret.minZ = minZ;\n\n  }\n\n  return ret;\n\n};\n\n/**************************************************************\n    *\tCreate Geometries Helpers\n    **************************************************************/\n\n/// Generate geometry from path points (for Line or Points objects)\n\nTHREE.CurvePath.prototype.createPointsGeometry = function (divisions) {\n\n  var pts = this.getPoints(divisions, true);\n  return this.createGeometry(pts);\n\n};\n\n// Generate geometry from equidistance sampling along the path\n\nTHREE.CurvePath.prototype.createSpacedPointsGeometry = function (divisions) {\n\n  var pts = this.getSpacedPoints(divisions, true);\n  return this.createGeometry(pts);\n\n};\n\nTHREE.CurvePath.prototype.createGeometry = function (points) {\n\n  var geometry = new THREE.Geometry();\n\n  for (var i = 0; i < points.length; i++) {\n\n    geometry.vertices.push(new THREE.Vector3(points[i].x, points[i].y, points[i].z || 0));\n\n  }\n\n  return geometry;\n\n};\n\n\n/**************************************************************\n    *\tBend / Wrap Helper Methods\n    **************************************************************/\n\n// Wrap path / Bend modifiers?\n\nTHREE.CurvePath.prototype.addWrapPath = function (bendpath) {\n\n  this.bends.push(bendpath);\n\n};\n\nTHREE.CurvePath.prototype.getTransformedPoints = function (segments, bends) {\n\n  var oldPts = this.getPoints(segments); // getPoints getSpacedPoints\n  var i, il;\n\n  if (!bends) {\n\n    bends = this.bends;\n\n  }\n\n  for (i = 0, il = bends.length; i < il; i++) {\n\n    oldPts = this.getWrapPoints(oldPts, bends[i]);\n\n  }\n\n  return oldPts;\n\n};\n\nTHREE.CurvePath.prototype.getTransformedSpacedPoints = function (segments, bends) {\n\n  var oldPts = this.getSpacedPoints(segments);\n\n  var i, il;\n\n  if (!bends) {\n\n    bends = this.bends;\n\n  }\n\n  for (i = 0, il = bends.length; i < il; i++) {\n\n    oldPts = this.getWrapPoints(oldPts, bends[i]);\n\n  }\n\n  return oldPts;\n\n};\n\n// This returns getPoints() bend/wrapped around the contour of a path.\n// Read http://www.planetclegg.com/projects/WarpingTextToSplines.html\n\nTHREE.CurvePath.prototype.getWrapPoints = function (oldPts, path) {\n\n  var bounds = this.getBoundingBox();\n\n  var i, il, p, oldX, oldY, xNorm;\n\n  for (i = 0, il = oldPts.length; i < il; i++) {\n\n    p = oldPts[i];\n\n    oldX = p.x;\n    oldY = p.y;\n\n    xNorm = oldX / bounds.maxX;\n\n    // If using actual distance, for length > path, requires line extrusions\n    //xNorm = path.getUtoTmapping(xNorm, oldX); // 3 styles. 1) wrap stretched. 2) wrap stretch by arc length 3) warp by actual distance\n\n    xNorm = path.getUtoTmapping(xNorm, oldX);\n\n    // check for out of bounds?\n\n    var pathPt = path.getPoint(xNorm);\n    var normal = path.getTangent(xNorm);\n    normal.set(-normal.y, normal.x).multiplyScalar(oldY);\n\n    p.x = pathPt.x + normal.x;\n    p.y = pathPt.y + normal.y;\n\n  }\n\n  return oldPts;\n\n};\n\n\n// File:src/extras/core/Gyroscope.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.Gyroscope = function () {\n\n  THREE.Object3D.call(this);\n\n};\n\nTHREE.Gyroscope.prototype = Object.create(THREE.Object3D.prototype);\nTHREE.Gyroscope.prototype.constructor = THREE.Gyroscope;\n\nTHREE.Gyroscope.prototype.updateMatrixWorld = function () {\n\n  var translationObject = new THREE.Vector3();\n  var quaternionObject = new THREE.Quaternion();\n  var scaleObject = new THREE.Vector3();\n\n  var translationWorld = new THREE.Vector3();\n  var quaternionWorld = new THREE.Quaternion();\n  var scaleWorld = new THREE.Vector3();\n\n  return function (force) {\n\n    this.matrixAutoUpdate && this.updateMatrix();\n\n    // update matrixWorld\n\n    if (this.matrixWorldNeedsUpdate || force) {\n\n      if (this.parent) {\n\n        this.matrixWorld.multiplyMatrices(this.parent.matrixWorld, this.matrix);\n\n        this.matrixWorld.decompose(translationWorld, quaternionWorld, scaleWorld);\n        this.matrix.decompose(translationObject, quaternionObject, scaleObject);\n\n        this.matrixWorld.compose(translationWorld, quaternionObject, scaleWorld);\n\n\n      } else {\n\n        this.matrixWorld.copy(this.matrix);\n\n      }\n\n\n      this.matrixWorldNeedsUpdate = false;\n\n      force = true;\n\n    }\n\n    // update children\n\n    for (var i = 0, l = this.children.length; i < l; i++) {\n\n      this.children[i].updateMatrixWorld(force);\n\n    }\n\n  };\n\n}();\n\n// File:src/extras/core/Path.js\n\n/**\n * @author zz85 / http://www.lab4games.net/zz85/blog\n * Creates free form 2d path using series of points, lines or curves.\n *\n **/\n\nTHREE.Path = function (points) {\n\n  THREE.CurvePath.call(this);\n\n  this.actions = [];\n\n  if (points) {\n\n    this.fromPoints(points);\n\n  }\n\n};\n\nTHREE.Path.prototype = Object.create(THREE.CurvePath.prototype);\nTHREE.Path.prototype.constructor = THREE.Path;\n\nTHREE.PathActions = {\n\n  MOVE_TO: 'moveTo',\n  LINE_TO: 'lineTo',\n  QUADRATIC_CURVE_TO: 'quadraticCurveTo', // Bezier quadratic curve\n  BEZIER_CURVE_TO: 'bezierCurveTo', // Bezier cubic curve\n  CSPLINE_THRU: 'splineThru', // Catmull-rom spline\n  ARC: 'arc', // Circle\n  ELLIPSE: 'ellipse' };\n\n\n// TODO Clean up PATH API\n\n// Create path using straight lines to connect all points\n// - vectors: array of Vector2\n\nTHREE.Path.prototype.fromPoints = function (vectors) {\n\n  this.moveTo(vectors[0].x, vectors[0].y);\n\n  for (var v = 1, vlen = vectors.length; v < vlen; v++) {\n\n    this.lineTo(vectors[v].x, vectors[v].y);\n\n  };\n\n};\n\n// startPath() endPath()?\n\nTHREE.Path.prototype.moveTo = function (x, y) {\n\n  var args = Array.prototype.slice.call(arguments);\n  this.actions.push({ action: THREE.PathActions.MOVE_TO, args: args });\n\n};\n\nTHREE.Path.prototype.lineTo = function (x, y) {\n\n  var args = Array.prototype.slice.call(arguments);\n\n  var lastargs = this.actions[this.actions.length - 1].args;\n\n  var x0 = lastargs[lastargs.length - 2];\n  var y0 = lastargs[lastargs.length - 1];\n\n  var curve = new THREE.LineCurve(new THREE.Vector2(x0, y0), new THREE.Vector2(x, y));\n  this.curves.push(curve);\n\n  this.actions.push({ action: THREE.PathActions.LINE_TO, args: args });\n\n};\n\nTHREE.Path.prototype.quadraticCurveTo = function (aCPx, aCPy, aX, aY) {\n\n  var args = Array.prototype.slice.call(arguments);\n\n  var lastargs = this.actions[this.actions.length - 1].args;\n\n  var x0 = lastargs[lastargs.length - 2];\n  var y0 = lastargs[lastargs.length - 1];\n\n  var curve = new THREE.QuadraticBezierCurve(new THREE.Vector2(x0, y0),\n  new THREE.Vector2(aCPx, aCPy),\n  new THREE.Vector2(aX, aY));\n  this.curves.push(curve);\n\n  this.actions.push({ action: THREE.PathActions.QUADRATIC_CURVE_TO, args: args });\n\n};\n\nTHREE.Path.prototype.bezierCurveTo = function (aCP1x, aCP1y,\naCP2x, aCP2y,\naX, aY) {\n\n  var args = Array.prototype.slice.call(arguments);\n\n  var lastargs = this.actions[this.actions.length - 1].args;\n\n  var x0 = lastargs[lastargs.length - 2];\n  var y0 = lastargs[lastargs.length - 1];\n\n  var curve = new THREE.CubicBezierCurve(new THREE.Vector2(x0, y0),\n  new THREE.Vector2(aCP1x, aCP1y),\n  new THREE.Vector2(aCP2x, aCP2y),\n  new THREE.Vector2(aX, aY));\n  this.curves.push(curve);\n\n  this.actions.push({ action: THREE.PathActions.BEZIER_CURVE_TO, args: args });\n\n};\n\nTHREE.Path.prototype.splineThru = function (pts /*Array of Vector*/) {\n\n  var args = Array.prototype.slice.call(arguments);\n  var lastargs = this.actions[this.actions.length - 1].args;\n\n  var x0 = lastargs[lastargs.length - 2];\n  var y0 = lastargs[lastargs.length - 1];\n  //---\n  var npts = [new THREE.Vector2(x0, y0)];\n  Array.prototype.push.apply(npts, pts);\n\n  var curve = new THREE.SplineCurve(npts);\n  this.curves.push(curve);\n\n  this.actions.push({ action: THREE.PathActions.CSPLINE_THRU, args: args });\n\n};\n\n// FUTURE: Change the API or follow canvas API?\n\nTHREE.Path.prototype.arc = function (aX, aY, aRadius,\naStartAngle, aEndAngle, aClockwise) {\n\n  var lastargs = this.actions[this.actions.length - 1].args;\n  var x0 = lastargs[lastargs.length - 2];\n  var y0 = lastargs[lastargs.length - 1];\n\n  this.absarc(aX + x0, aY + y0, aRadius,\n  aStartAngle, aEndAngle, aClockwise);\n\n};\n\nTHREE.Path.prototype.absarc = function (aX, aY, aRadius,\naStartAngle, aEndAngle, aClockwise) {\n  this.absellipse(aX, aY, aRadius, aRadius, aStartAngle, aEndAngle, aClockwise);\n};\n\nTHREE.Path.prototype.ellipse = function (aX, aY, xRadius, yRadius,\naStartAngle, aEndAngle, aClockwise) {\n\n  var lastargs = this.actions[this.actions.length - 1].args;\n  var x0 = lastargs[lastargs.length - 2];\n  var y0 = lastargs[lastargs.length - 1];\n\n  this.absellipse(aX + x0, aY + y0, xRadius, yRadius,\n  aStartAngle, aEndAngle, aClockwise);\n\n};\n\n\nTHREE.Path.prototype.absellipse = function (aX, aY, xRadius, yRadius,\naStartAngle, aEndAngle, aClockwise) {\n\n  var args = Array.prototype.slice.call(arguments);\n  var curve = new THREE.EllipseCurve(aX, aY, xRadius, yRadius,\n  aStartAngle, aEndAngle, aClockwise);\n  this.curves.push(curve);\n\n  var lastPoint = curve.getPoint(1);\n  args.push(lastPoint.x);\n  args.push(lastPoint.y);\n\n  this.actions.push({ action: THREE.PathActions.ELLIPSE, args: args });\n\n};\n\nTHREE.Path.prototype.getSpacedPoints = function (divisions, closedPath) {\n\n  if (!divisions) divisions = 40;\n\n  var points = [];\n\n  for (var i = 0; i < divisions; i++) {\n\n    points.push(this.getPoint(i / divisions));\n\n    //if( !this.getPoint( i / divisions ) ) throw \"DIE\";\n\n  }\n\n  // if ( closedPath ) {\n  //\n  // \tpoints.push( points[ 0 ] );\n  //\n  // }\n\n  return points;\n\n};\n\n/* Return an array of vectors based on contour of the path */\n\nTHREE.Path.prototype.getPoints = function (divisions, closedPath) {\n\n  if (this.useSpacedPoints) {\n    console.log('tata');\n    return this.getSpacedPoints(divisions, closedPath);\n  }\n\n  divisions = divisions || 12;\n\n  var points = [];\n\n  var i, il, item, action, args;\n  var cpx, cpy, cpx2, cpy2, cpx1, cpy1, cpx0, cpy0,\n  laste, j,\n  t, tx, ty;\n\n  for (i = 0, il = this.actions.length; i < il; i++) {\n\n    item = this.actions[i];\n\n    action = item.action;\n    args = item.args;\n\n    switch (action) {\n\n      case THREE.PathActions.MOVE_TO:\n\n        points.push(new THREE.Vector2(args[0], args[1]));\n\n        break;\n\n      case THREE.PathActions.LINE_TO:\n\n        points.push(new THREE.Vector2(args[0], args[1]));\n\n        break;\n\n      case THREE.PathActions.QUADRATIC_CURVE_TO:\n\n        cpx = args[2];\n        cpy = args[3];\n\n        cpx1 = args[0];\n        cpy1 = args[1];\n\n        if (points.length > 0) {\n\n          laste = points[points.length - 1];\n\n          cpx0 = laste.x;\n          cpy0 = laste.y;\n\n        } else {\n\n          laste = this.actions[i - 1].args;\n\n          cpx0 = laste[laste.length - 2];\n          cpy0 = laste[laste.length - 1];\n\n        }\n\n        for (j = 1; j <= divisions; j++) {\n\n          t = j / divisions;\n\n          tx = THREE.Shape.Utils.b2(t, cpx0, cpx1, cpx);\n          ty = THREE.Shape.Utils.b2(t, cpy0, cpy1, cpy);\n\n          points.push(new THREE.Vector2(tx, ty));\n\n        }\n\n        break;\n\n      case THREE.PathActions.BEZIER_CURVE_TO:\n\n        cpx = args[4];\n        cpy = args[5];\n\n        cpx1 = args[0];\n        cpy1 = args[1];\n\n        cpx2 = args[2];\n        cpy2 = args[3];\n\n        if (points.length > 0) {\n\n          laste = points[points.length - 1];\n\n          cpx0 = laste.x;\n          cpy0 = laste.y;\n\n        } else {\n\n          laste = this.actions[i - 1].args;\n\n          cpx0 = laste[laste.length - 2];\n          cpy0 = laste[laste.length - 1];\n\n        }\n\n\n        for (j = 1; j <= divisions; j++) {\n\n          t = j / divisions;\n\n          tx = THREE.Shape.Utils.b3(t, cpx0, cpx1, cpx2, cpx);\n          ty = THREE.Shape.Utils.b3(t, cpy0, cpy1, cpy2, cpy);\n\n          points.push(new THREE.Vector2(tx, ty));\n\n        }\n\n        break;\n\n      case THREE.PathActions.CSPLINE_THRU:\n\n        laste = this.actions[i - 1].args;\n\n        var last = new THREE.Vector2(laste[laste.length - 2], laste[laste.length - 1]);\n        var spts = [last];\n\n        var n = divisions * args[0].length;\n\n        spts = spts.concat(args[0]);\n\n        var spline = new THREE.SplineCurve(spts);\n\n        for (j = 1; j <= n; j++) {\n\n          points.push(spline.getPointAt(j / n));\n\n        }\n\n        break;\n\n      case THREE.PathActions.ARC:\n\n        var aX = args[0],aY = args[1],\n        aRadius = args[2],\n        aStartAngle = args[3],aEndAngle = args[4],\n        aClockwise = !!args[5];\n\n        var deltaAngle = aEndAngle - aStartAngle;\n        var angle;\n        var tdivisions = divisions * 2;\n\n        for (j = 1; j <= tdivisions; j++) {\n\n          t = j / tdivisions;\n\n          if (!aClockwise) {\n\n            t = 1 - t;\n\n          }\n\n          angle = aStartAngle + t * deltaAngle;\n\n          tx = aX + aRadius * Math.cos(angle);\n          ty = aY + aRadius * Math.sin(angle);\n\n          //console.log('t', t, 'angle', angle, 'tx', tx, 'ty', ty);\n\n          points.push(new THREE.Vector2(tx, ty));\n\n        }\n\n        //console.log(points);\n\n        break;\n\n      case THREE.PathActions.ELLIPSE:\n\n        var aX = args[0],aY = args[1],\n        xRadius = args[2],\n        yRadius = args[3],\n        aStartAngle = args[4],aEndAngle = args[5],\n        aClockwise = !!args[6];\n\n\n        var deltaAngle = aEndAngle - aStartAngle;\n        var angle;\n        var tdivisions = divisions * 2;\n\n        for (j = 1; j <= tdivisions; j++) {\n\n          t = j / tdivisions;\n\n          if (!aClockwise) {\n\n            t = 1 - t;\n\n          }\n\n          angle = aStartAngle + t * deltaAngle;\n\n          tx = aX + xRadius * Math.cos(angle);\n          ty = aY + yRadius * Math.sin(angle);\n\n          //console.log('t', t, 'angle', angle, 'tx', tx, 'ty', ty);\n\n          points.push(new THREE.Vector2(tx, ty));\n\n        }\n\n        //console.log(points);\n\n        break;}\n\n    // end switch\n\n  }\n\n\n\n  // Normalize to remove the closing point by default.\n  var lastPoint = points[points.length - 1];\n  var EPSILON = 0.0000000001;\n  if (Math.abs(lastPoint.x - points[0].x) < EPSILON &&\n  Math.abs(lastPoint.y - points[0].y) < EPSILON)\n  points.splice(points.length - 1, 1);\n  if (closedPath) {\n\n    points.push(points[0]);\n\n  }\n\n  return points;\n\n};\n\n//\n// Breaks path into shapes\n//\n//\tAssumptions (if parameter isCCW==true the opposite holds):\n//\t- solid shapes are defined clockwise (CW)\n//\t- holes are defined counterclockwise (CCW)\n//\n//\tIf parameter noHoles==true:\n//  - all subPaths are regarded as solid shapes\n//  - definition order CW/CCW has no relevance\n//\n\nTHREE.Path.prototype.toShapes = function (isCCW, noHoles) {\n\n  function extractSubpaths(inActions) {\n\n    var i, il, item, action, args;\n\n    var subPaths = [],lastPath = new THREE.Path();\n\n    for (i = 0, il = inActions.length; i < il; i++) {\n\n      item = inActions[i];\n\n      args = item.args;\n      action = item.action;\n\n      if (action == THREE.PathActions.MOVE_TO) {\n\n        if (lastPath.actions.length != 0) {\n\n          subPaths.push(lastPath);\n          lastPath = new THREE.Path();\n\n        }\n\n      }\n\n      lastPath[action].apply(lastPath, args);\n\n    }\n\n    if (lastPath.actions.length != 0) {\n\n      subPaths.push(lastPath);\n\n    }\n\n    // console.log(subPaths);\n\n    return subPaths;\n  }\n\n  function toShapesNoHoles(inSubpaths) {\n\n    var shapes = [];\n\n    for (var i = 0, il = inSubpaths.length; i < il; i++) {\n\n      var tmpPath = inSubpaths[i];\n\n      var tmpShape = new THREE.Shape();\n      tmpShape.actions = tmpPath.actions;\n      tmpShape.curves = tmpPath.curves;\n\n      shapes.push(tmpShape);\n    }\n\n    //console.log(\"shape\", shapes);\n\n    return shapes;\n  };\n\n  function isPointInsidePolygon(inPt, inPolygon) {\n    var EPSILON = 0.0000000001;\n\n    var polyLen = inPolygon.length;\n\n    // inPt on polygon contour => immediate success    or\n    // toggling of inside/outside at every single! intersection point of an edge\n    //  with the horizontal line through inPt, left of inPt\n    //  not counting lowerY endpoints of edges and whole edges on that line\n    var inside = false;\n    for (var p = polyLen - 1, q = 0; q < polyLen; p = q++) {\n      var edgeLowPt = inPolygon[p];\n      var edgeHighPt = inPolygon[q];\n\n      var edgeDx = edgeHighPt.x - edgeLowPt.x;\n      var edgeDy = edgeHighPt.y - edgeLowPt.y;\n\n      if (Math.abs(edgeDy) > EPSILON) {// not parallel\n        if (edgeDy < 0) {\n          edgeLowPt = inPolygon[q];edgeDx = -edgeDx;\n          edgeHighPt = inPolygon[p];edgeDy = -edgeDy;\n        }\n        if (inPt.y < edgeLowPt.y || inPt.y > edgeHighPt.y) continue;\n\n        if (inPt.y == edgeLowPt.y) {\n          if (inPt.x == edgeLowPt.x) return true; // inPt is on contour ?\n          // continue;\t\t\t\t// no intersection or edgeLowPt => doesn't count !!!\n        } else {\n          var perpEdge = edgeDy * (inPt.x - edgeLowPt.x) - edgeDx * (inPt.y - edgeLowPt.y);\n          if (perpEdge == 0) return true; // inPt is on contour ?\n          if (perpEdge < 0) continue;\n          inside = !inside; // true intersection left of inPt\n        }\n      } else {// parallel or colinear\n        if (inPt.y != edgeLowPt.y) continue; // parallel\n        // egde lies on the same horizontal line as inPt\n        if (edgeHighPt.x <= inPt.x && inPt.x <= edgeLowPt.x ||\n        edgeLowPt.x <= inPt.x && inPt.x <= edgeHighPt.x) return true; // inPt: Point on contour !\n        // continue;\n      }\n    }\n\n    return inside;\n  }\n\n\n  var subPaths = extractSubpaths(this.actions);\n  if (subPaths.length == 0) return [];\n\n  if (noHoles === true) return toShapesNoHoles(subPaths);\n\n\n  var solid,tmpPath,tmpShape,shapes = [];\n\n  if (subPaths.length == 1) {\n\n    tmpPath = subPaths[0];\n    tmpShape = new THREE.Shape();\n    tmpShape.actions = tmpPath.actions;\n    tmpShape.curves = tmpPath.curves;\n    shapes.push(tmpShape);\n    return shapes;\n\n  }\n\n  var holesFirst = !THREE.Shape.Utils.isClockWise(subPaths[0].getPoints());\n  holesFirst = isCCW ? !holesFirst : holesFirst;\n\n  // console.log(\"Holes first\", holesFirst);\n\n  var betterShapeHoles = [];\n  var newShapes = [];\n  var newShapeHoles = [];\n  var mainIdx = 0;\n  var tmpPoints;\n\n  newShapes[mainIdx] = undefined;\n  newShapeHoles[mainIdx] = [];\n\n  var i, il;\n\n  for (i = 0, il = subPaths.length; i < il; i++) {\n\n    tmpPath = subPaths[i];\n    tmpPoints = tmpPath.getPoints();\n    solid = THREE.Shape.Utils.isClockWise(tmpPoints);\n    solid = isCCW ? !solid : solid;\n\n    if (solid) {\n\n      if (!holesFirst && newShapes[mainIdx]) mainIdx++;\n\n      newShapes[mainIdx] = { s: new THREE.Shape(), p: tmpPoints };\n      newShapes[mainIdx].s.actions = tmpPath.actions;\n      newShapes[mainIdx].s.curves = tmpPath.curves;\n\n      if (holesFirst) mainIdx++;\n      newShapeHoles[mainIdx] = [];\n\n      //console.log('cw', i);\n\n    } else {\n\n      newShapeHoles[mainIdx].push({ h: tmpPath, p: tmpPoints[0] });\n\n      //console.log('ccw', i);\n\n    }\n\n  }\n\n  // only Holes? -> probably all Shapes with wrong orientation\n  if (!newShapes[0]) return toShapesNoHoles(subPaths);\n\n\n  if (newShapes.length > 1) {\n    var ambigious = false;\n    var toChange = [];\n\n    for (var sIdx = 0, sLen = newShapes.length; sIdx < sLen; sIdx++) {\n      betterShapeHoles[sIdx] = [];\n    }\n    for (var sIdx = 0, sLen = newShapes.length; sIdx < sLen; sIdx++) {\n      var sho = newShapeHoles[sIdx];\n      for (var hIdx = 0; hIdx < sho.length; hIdx++) {\n        var ho = sho[hIdx];\n        var hole_unassigned = true;\n        for (var s2Idx = 0; s2Idx < newShapes.length; s2Idx++) {\n          if (isPointInsidePolygon(ho.p, newShapes[s2Idx].p)) {\n            if (sIdx != s2Idx) toChange.push({ froms: sIdx, tos: s2Idx, hole: hIdx });\n            if (hole_unassigned) {\n              hole_unassigned = false;\n              betterShapeHoles[s2Idx].push(ho);\n            } else {\n              ambigious = true;\n            }\n          }\n        }\n        if (hole_unassigned) {betterShapeHoles[sIdx].push(ho);}\n      }\n    }\n    // console.log(\"ambigious: \", ambigious);\n    if (toChange.length > 0) {\n      // console.log(\"to change: \", toChange);\n      if (!ambigious) newShapeHoles = betterShapeHoles;\n    }\n  }\n\n  var tmpHoles, j, jl;\n  for (i = 0, il = newShapes.length; i < il; i++) {\n    tmpShape = newShapes[i].s;\n    shapes.push(tmpShape);\n    tmpHoles = newShapeHoles[i];\n    for (j = 0, jl = tmpHoles.length; j < jl; j++) {\n      tmpShape.holes.push(tmpHoles[j].h);\n    }\n  }\n\n  //console.log(\"shape\", shapes);\n\n  return shapes;\n\n};\n\n// File:src/extras/core/Shape.js\n\n/**\n * @author zz85 / http://www.lab4games.net/zz85/blog\n * Defines a 2d shape plane using paths.\n **/\n\n// STEP 1 Create a path.\n// STEP 2 Turn path into shape.\n// STEP 3 ExtrudeGeometry takes in Shape/Shapes\n// STEP 3a - Extract points from each shape, turn to vertices\n// STEP 3b - Triangulate each shape, add faces.\n\nTHREE.Shape = function () {\n\n  THREE.Path.apply(this, arguments);\n  this.holes = [];\n\n};\n\nTHREE.Shape.prototype = Object.create(THREE.Path.prototype);\nTHREE.Shape.prototype.constructor = THREE.Shape;\n\n// Convenience method to return ExtrudeGeometry\n\nTHREE.Shape.prototype.extrude = function (options) {\n\n  var extruded = new THREE.ExtrudeGeometry(this, options);\n  return extruded;\n\n};\n\n// Convenience method to return ShapeGeometry\n\nTHREE.Shape.prototype.makeGeometry = function (options) {\n\n  var geometry = new THREE.ShapeGeometry(this, options);\n  return geometry;\n\n};\n\n// Get points of holes\n\nTHREE.Shape.prototype.getPointsHoles = function (divisions) {\n\n  var i,il = this.holes.length,holesPts = [];\n\n  for (i = 0; i < il; i++) {\n\n    holesPts[i] = this.holes[i].getTransformedPoints(divisions, this.bends);\n\n  }\n\n  return holesPts;\n\n};\n\n// Get points of holes (spaced by regular distance)\n\nTHREE.Shape.prototype.getSpacedPointsHoles = function (divisions) {\n\n  var i,il = this.holes.length,holesPts = [];\n\n  for (i = 0; i < il; i++) {\n\n    holesPts[i] = this.holes[i].getTransformedSpacedPoints(divisions, this.bends);\n\n  }\n\n  return holesPts;\n\n};\n\n\n// Get points of shape and holes (keypoints based on segments parameter)\n\nTHREE.Shape.prototype.extractAllPoints = function (divisions) {\n\n  return {\n\n    shape: this.getTransformedPoints(divisions),\n    holes: this.getPointsHoles(divisions) };\n\n\n\n};\n\nTHREE.Shape.prototype.extractPoints = function (divisions) {\n\n  if (this.useSpacedPoints) {\n    return this.extractAllSpacedPoints(divisions);\n  }\n\n  return this.extractAllPoints(divisions);\n\n};\n\n//\n// THREE.Shape.prototype.extractAllPointsWithBend = function ( divisions, bend ) {\n//\n// \treturn {\n//\n// \t\tshape: this.transform( bend, divisions ),\n// \t\tholes: this.getPointsHoles( divisions, bend )\n//\n// \t};\n//\n// };\n\n// Get points of shape and holes (spaced by regular distance)\n\nTHREE.Shape.prototype.extractAllSpacedPoints = function (divisions) {\n\n  return {\n\n    shape: this.getTransformedSpacedPoints(divisions),\n    holes: this.getSpacedPointsHoles(divisions) };\n\n\n\n};\n\n/**************************************************************\n    *\tUtils\n    **************************************************************/\n\nTHREE.Shape.Utils = {\n\n  triangulateShape: function triangulateShape(contour, holes) {\n\n    function point_in_segment_2D_colin(inSegPt1, inSegPt2, inOtherPt) {\n      // inOtherPt needs to be colinear to the inSegment\n      if (inSegPt1.x != inSegPt2.x) {\n        if (inSegPt1.x < inSegPt2.x) {\n          return inSegPt1.x <= inOtherPt.x && inOtherPt.x <= inSegPt2.x;\n        } else {\n          return inSegPt2.x <= inOtherPt.x && inOtherPt.x <= inSegPt1.x;\n        }\n      } else {\n        if (inSegPt1.y < inSegPt2.y) {\n          return inSegPt1.y <= inOtherPt.y && inOtherPt.y <= inSegPt2.y;\n        } else {\n          return inSegPt2.y <= inOtherPt.y && inOtherPt.y <= inSegPt1.y;\n        }\n      }\n    }\n\n    function intersect_segments_2D(inSeg1Pt1, inSeg1Pt2, inSeg2Pt1, inSeg2Pt2, inExcludeAdjacentSegs) {\n      var EPSILON = 0.0000000001;\n\n      var seg1dx = inSeg1Pt2.x - inSeg1Pt1.x,seg1dy = inSeg1Pt2.y - inSeg1Pt1.y;\n      var seg2dx = inSeg2Pt2.x - inSeg2Pt1.x,seg2dy = inSeg2Pt2.y - inSeg2Pt1.y;\n\n      var seg1seg2dx = inSeg1Pt1.x - inSeg2Pt1.x;\n      var seg1seg2dy = inSeg1Pt1.y - inSeg2Pt1.y;\n\n      var limit = seg1dy * seg2dx - seg1dx * seg2dy;\n      var perpSeg1 = seg1dy * seg1seg2dx - seg1dx * seg1seg2dy;\n\n      if (Math.abs(limit) > EPSILON) {// not parallel\n\n        var perpSeg2;\n        if (limit > 0) {\n          if (perpSeg1 < 0 || perpSeg1 > limit) return [];\n          perpSeg2 = seg2dy * seg1seg2dx - seg2dx * seg1seg2dy;\n          if (perpSeg2 < 0 || perpSeg2 > limit) return [];\n        } else {\n          if (perpSeg1 > 0 || perpSeg1 < limit) return [];\n          perpSeg2 = seg2dy * seg1seg2dx - seg2dx * seg1seg2dy;\n          if (perpSeg2 > 0 || perpSeg2 < limit) return [];\n        }\n\n        // i.e. to reduce rounding errors\n        // intersection at endpoint of segment#1?\n        if (perpSeg2 == 0) {\n          if (inExcludeAdjacentSegs && (\n          perpSeg1 == 0 || perpSeg1 == limit)) return [];\n          return [inSeg1Pt1];\n        }\n        if (perpSeg2 == limit) {\n          if (inExcludeAdjacentSegs && (\n          perpSeg1 == 0 || perpSeg1 == limit)) return [];\n          return [inSeg1Pt2];\n        }\n        // intersection at endpoint of segment#2?\n        if (perpSeg1 == 0) return [inSeg2Pt1];\n        if (perpSeg1 == limit) return [inSeg2Pt2];\n\n        // return real intersection point\n        var factorSeg1 = perpSeg2 / limit;\n        return [{ x: inSeg1Pt1.x + factorSeg1 * seg1dx,\n          y: inSeg1Pt1.y + factorSeg1 * seg1dy }];\n\n      } else {// parallel or colinear\n        if (perpSeg1 != 0 ||\n        seg2dy * seg1seg2dx != seg2dx * seg1seg2dy) return [];\n\n        // they are collinear or degenerate\n        var seg1Pt = seg1dx == 0 && seg1dy == 0; // segment1 ist just a point?\n        var seg2Pt = seg2dx == 0 && seg2dy == 0; // segment2 ist just a point?\n        // both segments are points\n        if (seg1Pt && seg2Pt) {\n          if (inSeg1Pt1.x != inSeg2Pt1.x ||\n          inSeg1Pt1.y != inSeg2Pt1.y) return []; // they are distinct  points\n          return [inSeg1Pt1]; // they are the same point\n        }\n        // segment#1  is a single point\n        if (seg1Pt) {\n          if (!point_in_segment_2D_colin(inSeg2Pt1, inSeg2Pt2, inSeg1Pt1)) return []; // but not in segment#2\n          return [inSeg1Pt1];\n        }\n        // segment#2  is a single point\n        if (seg2Pt) {\n          if (!point_in_segment_2D_colin(inSeg1Pt1, inSeg1Pt2, inSeg2Pt1)) return []; // but not in segment#1\n          return [inSeg2Pt1];\n        }\n\n        // they are collinear segments, which might overlap\n        var seg1min, seg1max, seg1minVal, seg1maxVal;\n        var seg2min, seg2max, seg2minVal, seg2maxVal;\n        if (seg1dx != 0) {// the segments are NOT on a vertical line\n          if (inSeg1Pt1.x < inSeg1Pt2.x) {\n            seg1min = inSeg1Pt1;seg1minVal = inSeg1Pt1.x;\n            seg1max = inSeg1Pt2;seg1maxVal = inSeg1Pt2.x;\n          } else {\n            seg1min = inSeg1Pt2;seg1minVal = inSeg1Pt2.x;\n            seg1max = inSeg1Pt1;seg1maxVal = inSeg1Pt1.x;\n          }\n          if (inSeg2Pt1.x < inSeg2Pt2.x) {\n            seg2min = inSeg2Pt1;seg2minVal = inSeg2Pt1.x;\n            seg2max = inSeg2Pt2;seg2maxVal = inSeg2Pt2.x;\n          } else {\n            seg2min = inSeg2Pt2;seg2minVal = inSeg2Pt2.x;\n            seg2max = inSeg2Pt1;seg2maxVal = inSeg2Pt1.x;\n          }\n        } else {// the segments are on a vertical line\n          if (inSeg1Pt1.y < inSeg1Pt2.y) {\n            seg1min = inSeg1Pt1;seg1minVal = inSeg1Pt1.y;\n            seg1max = inSeg1Pt2;seg1maxVal = inSeg1Pt2.y;\n          } else {\n            seg1min = inSeg1Pt2;seg1minVal = inSeg1Pt2.y;\n            seg1max = inSeg1Pt1;seg1maxVal = inSeg1Pt1.y;\n          }\n          if (inSeg2Pt1.y < inSeg2Pt2.y) {\n            seg2min = inSeg2Pt1;seg2minVal = inSeg2Pt1.y;\n            seg2max = inSeg2Pt2;seg2maxVal = inSeg2Pt2.y;\n          } else {\n            seg2min = inSeg2Pt2;seg2minVal = inSeg2Pt2.y;\n            seg2max = inSeg2Pt1;seg2maxVal = inSeg2Pt1.y;\n          }\n        }\n        if (seg1minVal <= seg2minVal) {\n          if (seg1maxVal < seg2minVal) return [];\n          if (seg1maxVal == seg2minVal) {\n            if (inExcludeAdjacentSegs) return [];\n            return [seg2min];\n          }\n          if (seg1maxVal <= seg2maxVal) return [seg2min, seg1max];\n          return [seg2min, seg2max];\n        } else {\n          if (seg1minVal > seg2maxVal) return [];\n          if (seg1minVal == seg2maxVal) {\n            if (inExcludeAdjacentSegs) return [];\n            return [seg1min];\n          }\n          if (seg1maxVal <= seg2maxVal) return [seg1min, seg1max];\n          return [seg1min, seg2max];\n        }\n      }\n    }\n\n    function isPointInsideAngle(inVertex, inLegFromPt, inLegToPt, inOtherPt) {\n      // The order of legs is important\n\n      var EPSILON = 0.0000000001;\n\n      // translation of all points, so that Vertex is at (0,0)\n      var legFromPtX = inLegFromPt.x - inVertex.x,legFromPtY = inLegFromPt.y - inVertex.y;\n      var legToPtX = inLegToPt.x - inVertex.x,legToPtY = inLegToPt.y - inVertex.y;\n      var otherPtX = inOtherPt.x - inVertex.x,otherPtY = inOtherPt.y - inVertex.y;\n\n      // main angle >0: < 180 deg.; 0: 180 deg.; <0: > 180 deg.\n      var from2toAngle = legFromPtX * legToPtY - legFromPtY * legToPtX;\n      var from2otherAngle = legFromPtX * otherPtY - legFromPtY * otherPtX;\n\n      if (Math.abs(from2toAngle) > EPSILON) {// angle != 180 deg.\n\n        var other2toAngle = otherPtX * legToPtY - otherPtY * legToPtX;\n        // console.log( \"from2to: \" + from2toAngle + \", from2other: \" + from2otherAngle + \", other2to: \" + other2toAngle );\n\n        if (from2toAngle > 0) {// main angle < 180 deg.\n          return from2otherAngle >= 0 && other2toAngle >= 0;\n        } else {// main angle > 180 deg.\n          return from2otherAngle >= 0 || other2toAngle >= 0;\n        }\n      } else {// angle == 180 deg.\n        // console.log( \"from2to: 180 deg., from2other: \" + from2otherAngle  );\n        return from2otherAngle > 0;\n      }\n    }\n\n\n    function removeHoles(contour, holes) {\n\n      var shape = contour.concat(); // work on this shape\n      var hole;\n\n      function isCutLineInsideAngles(inShapeIdx, inHoleIdx) {\n        // Check if hole point lies within angle around shape point\n        var lastShapeIdx = shape.length - 1;\n\n        var prevShapeIdx = inShapeIdx - 1;\n        if (prevShapeIdx < 0) prevShapeIdx = lastShapeIdx;\n\n        var nextShapeIdx = inShapeIdx + 1;\n        if (nextShapeIdx > lastShapeIdx) nextShapeIdx = 0;\n\n        var insideAngle = isPointInsideAngle(shape[inShapeIdx], shape[prevShapeIdx], shape[nextShapeIdx], hole[inHoleIdx]);\n        if (!insideAngle) {\n          // console.log( \"Vertex (Shape): \" + inShapeIdx + \", Point: \" + hole[inHoleIdx].x + \"/\" + hole[inHoleIdx].y );\n          return false;\n        }\n\n        // Check if shape point lies within angle around hole point\n        var lastHoleIdx = hole.length - 1;\n\n        var prevHoleIdx = inHoleIdx - 1;\n        if (prevHoleIdx < 0) prevHoleIdx = lastHoleIdx;\n\n        var nextHoleIdx = inHoleIdx + 1;\n        if (nextHoleIdx > lastHoleIdx) nextHoleIdx = 0;\n\n        insideAngle = isPointInsideAngle(hole[inHoleIdx], hole[prevHoleIdx], hole[nextHoleIdx], shape[inShapeIdx]);\n        if (!insideAngle) {\n          // console.log( \"Vertex (Hole): \" + inHoleIdx + \", Point: \" + shape[inShapeIdx].x + \"/\" + shape[inShapeIdx].y );\n          return false;\n        }\n\n        return true;\n      }\n\n      function intersectsShapeEdge(inShapePt, inHolePt) {\n        // checks for intersections with shape edges\n        var sIdx, nextIdx, intersection;\n        for (sIdx = 0; sIdx < shape.length; sIdx++) {\n          nextIdx = sIdx + 1;nextIdx %= shape.length;\n          intersection = intersect_segments_2D(inShapePt, inHolePt, shape[sIdx], shape[nextIdx], true);\n          if (intersection.length > 0) return true;\n        }\n\n        return false;\n      }\n\n      var indepHoles = [];\n\n      function intersectsHoleEdge(inShapePt, inHolePt) {\n        // checks for intersections with hole edges\n        var ihIdx, chkHole,\n        hIdx, nextIdx, intersection;\n        for (ihIdx = 0; ihIdx < indepHoles.length; ihIdx++) {\n          chkHole = holes[indepHoles[ihIdx]];\n          for (hIdx = 0; hIdx < chkHole.length; hIdx++) {\n            nextIdx = hIdx + 1;nextIdx %= chkHole.length;\n            intersection = intersect_segments_2D(inShapePt, inHolePt, chkHole[hIdx], chkHole[nextIdx], true);\n            if (intersection.length > 0) return true;\n          }\n        }\n        return false;\n      }\n\n      var holeIndex,shapeIndex,\n      shapePt,holePt,\n      holeIdx,cutKey,failedCuts = [],\n      tmpShape1,tmpShape2,\n      tmpHole1,tmpHole2;\n\n      for (var h = 0, hl = holes.length; h < hl; h++) {\n\n        indepHoles.push(h);\n\n      }\n\n      var minShapeIndex = 0;\n      var counter = indepHoles.length * 2;\n      while (indepHoles.length > 0) {\n        counter--;\n        if (counter < 0) {\n          console.log(\"Infinite Loop! Holes left:\" + indepHoles.length + \", Probably Hole outside Shape!\");\n          break;\n        }\n\n        // search for shape-vertex and hole-vertex,\n        // which can be connected without intersections\n        for (shapeIndex = minShapeIndex; shapeIndex < shape.length; shapeIndex++) {\n\n          shapePt = shape[shapeIndex];\n          holeIndex = -1;\n\n          // search for hole which can be reached without intersections\n          for (var h = 0; h < indepHoles.length; h++) {\n            holeIdx = indepHoles[h];\n\n            // prevent multiple checks\n            cutKey = shapePt.x + \":\" + shapePt.y + \":\" + holeIdx;\n            if (failedCuts[cutKey] !== undefined) continue;\n\n            hole = holes[holeIdx];\n            for (var h2 = 0; h2 < hole.length; h2++) {\n              holePt = hole[h2];\n              if (!isCutLineInsideAngles(shapeIndex, h2)) continue;\n              if (intersectsShapeEdge(shapePt, holePt)) continue;\n              if (intersectsHoleEdge(shapePt, holePt)) continue;\n\n              holeIndex = h2;\n              indepHoles.splice(h, 1);\n\n              tmpShape1 = shape.slice(0, shapeIndex + 1);\n              tmpShape2 = shape.slice(shapeIndex);\n              tmpHole1 = hole.slice(holeIndex);\n              tmpHole2 = hole.slice(0, holeIndex + 1);\n\n              shape = tmpShape1.concat(tmpHole1).concat(tmpHole2).concat(tmpShape2);\n\n              minShapeIndex = shapeIndex;\n\n              // Debug only, to show the selected cuts\n              // glob_CutLines.push( [ shapePt, holePt ] );\n\n              break;\n            }\n            if (holeIndex >= 0) break; // hole-vertex found\n\n            failedCuts[cutKey] = true; // remember failure\n          }\n          if (holeIndex >= 0) break; // hole-vertex found\n        }\n      }\n\n      return shape; /* shape with no holes */\n    }\n\n\n    var i,il,f,face,\n    key,index,\n    allPointsMap = {};\n\n    // To maintain reference to old shape, one must match coordinates, or offset the indices from original arrays. It's probably easier to do the first.\n\n    var allpoints = contour.concat();\n\n    for (var h = 0, hl = holes.length; h < hl; h++) {\n\n      Array.prototype.push.apply(allpoints, holes[h]);\n\n    }\n\n    //console.log( \"allpoints\",allpoints, allpoints.length );\n\n    // prepare all points map\n\n    for (i = 0, il = allpoints.length; i < il; i++) {\n\n      key = allpoints[i].x + \":\" + allpoints[i].y;\n\n      if (allPointsMap[key] !== undefined) {\n\n        THREE.warn(\"THREE.Shape: Duplicate point\", key);\n\n      }\n\n      allPointsMap[key] = i;\n\n    }\n\n    // remove holes by cutting paths to holes and adding them to the shape\n    var shapeWithoutHoles = removeHoles(contour, holes);\n\n    var triangles = THREE.FontUtils.Triangulate(shapeWithoutHoles, false); // True returns indices for points of spooled shape\n    //console.log( \"triangles\",triangles, triangles.length );\n\n    // check all face vertices against all points map\n\n    for (i = 0, il = triangles.length; i < il; i++) {\n\n      face = triangles[i];\n\n      for (f = 0; f < 3; f++) {\n\n        key = face[f].x + \":\" + face[f].y;\n\n        index = allPointsMap[key];\n\n        if (index !== undefined) {\n\n          face[f] = index;\n\n        }\n\n      }\n\n    }\n\n    return triangles.concat();\n\n  },\n\n  isClockWise: function isClockWise(pts) {\n\n    return THREE.FontUtils.Triangulate.area(pts) < 0;\n\n  },\n\n  // Bezier Curves formulas obtained from\n  // http://en.wikipedia.org/wiki/B%C3%A9zier_curve\n\n  // Quad Bezier Functions\n\n  b2p0: function b2p0(t, p) {\n\n    var k = 1 - t;\n    return k * k * p;\n\n  },\n\n  b2p1: function b2p1(t, p) {\n\n    return 2 * (1 - t) * t * p;\n\n  },\n\n  b2p2: function b2p2(t, p) {\n\n    return t * t * p;\n\n  },\n\n  b2: function b2(t, p0, p1, p2) {\n\n    return this.b2p0(t, p0) + this.b2p1(t, p1) + this.b2p2(t, p2);\n\n  },\n\n  // Cubic Bezier Functions\n\n  b3p0: function b3p0(t, p) {\n\n    var k = 1 - t;\n    return k * k * k * p;\n\n  },\n\n  b3p1: function b3p1(t, p) {\n\n    var k = 1 - t;\n    return 3 * k * k * t * p;\n\n  },\n\n  b3p2: function b3p2(t, p) {\n\n    var k = 1 - t;\n    return 3 * k * t * t * p;\n\n  },\n\n  b3p3: function b3p3(t, p) {\n\n    return t * t * t * p;\n\n  },\n\n  b3: function b3(t, p0, p1, p2, p3) {\n\n    return this.b3p0(t, p0) + this.b3p1(t, p1) + this.b3p2(t, p2) + this.b3p3(t, p3);\n\n  } };\n\n\n\n\n// File:src/extras/curves/LineCurve.js\n\n/**************************************************************\n *\tLine\n **************************************************************/\n\nTHREE.LineCurve = function (v1, v2) {\n\n  this.v1 = v1;\n  this.v2 = v2;\n\n};\n\nTHREE.LineCurve.prototype = Object.create(THREE.Curve.prototype);\nTHREE.LineCurve.prototype.constructor = THREE.LineCurve;\n\nTHREE.LineCurve.prototype.getPoint = function (t) {\n\n  var point = this.v2.clone().sub(this.v1);\n  point.multiplyScalar(t).add(this.v1);\n\n  return point;\n\n};\n\n// Line curve is linear, so we can overwrite default getPointAt\n\nTHREE.LineCurve.prototype.getPointAt = function (u) {\n\n  return this.getPoint(u);\n\n};\n\nTHREE.LineCurve.prototype.getTangent = function (t) {\n\n  var tangent = this.v2.clone().sub(this.v1);\n\n  return tangent.normalize();\n\n};\n\n// File:src/extras/curves/QuadraticBezierCurve.js\n\n/**************************************************************\n *\tQuadratic Bezier curve\n **************************************************************/\n\n\nTHREE.QuadraticBezierCurve = function (v0, v1, v2) {\n\n  this.v0 = v0;\n  this.v1 = v1;\n  this.v2 = v2;\n\n};\n\nTHREE.QuadraticBezierCurve.prototype = Object.create(THREE.Curve.prototype);\nTHREE.QuadraticBezierCurve.prototype.constructor = THREE.QuadraticBezierCurve;\n\n\nTHREE.QuadraticBezierCurve.prototype.getPoint = function (t) {\n\n  var vector = new THREE.Vector2();\n\n  vector.x = THREE.Shape.Utils.b2(t, this.v0.x, this.v1.x, this.v2.x);\n  vector.y = THREE.Shape.Utils.b2(t, this.v0.y, this.v1.y, this.v2.y);\n\n  return vector;\n\n};\n\n\nTHREE.QuadraticBezierCurve.prototype.getTangent = function (t) {\n\n  var vector = new THREE.Vector2();\n\n  vector.x = THREE.Curve.Utils.tangentQuadraticBezier(t, this.v0.x, this.v1.x, this.v2.x);\n  vector.y = THREE.Curve.Utils.tangentQuadraticBezier(t, this.v0.y, this.v1.y, this.v2.y);\n\n  // returns unit vector\n\n  return vector.normalize();\n\n};\n\n// File:src/extras/curves/CubicBezierCurve.js\n\n/**************************************************************\n *\tCubic Bezier curve\n **************************************************************/\n\nTHREE.CubicBezierCurve = function (v0, v1, v2, v3) {\n\n  this.v0 = v0;\n  this.v1 = v1;\n  this.v2 = v2;\n  this.v3 = v3;\n\n};\n\nTHREE.CubicBezierCurve.prototype = Object.create(THREE.Curve.prototype);\nTHREE.CubicBezierCurve.prototype.constructor = THREE.CubicBezierCurve;\n\nTHREE.CubicBezierCurve.prototype.getPoint = function (t) {\n\n  var tx, ty;\n\n  tx = THREE.Shape.Utils.b3(t, this.v0.x, this.v1.x, this.v2.x, this.v3.x);\n  ty = THREE.Shape.Utils.b3(t, this.v0.y, this.v1.y, this.v2.y, this.v3.y);\n\n  return new THREE.Vector2(tx, ty);\n\n};\n\nTHREE.CubicBezierCurve.prototype.getTangent = function (t) {\n\n  var tx, ty;\n\n  tx = THREE.Curve.Utils.tangentCubicBezier(t, this.v0.x, this.v1.x, this.v2.x, this.v3.x);\n  ty = THREE.Curve.Utils.tangentCubicBezier(t, this.v0.y, this.v1.y, this.v2.y, this.v3.y);\n\n  var tangent = new THREE.Vector2(tx, ty);\n  tangent.normalize();\n\n  return tangent;\n\n};\n\n// File:src/extras/curves/SplineCurve.js\n\n/**************************************************************\n *\tSpline curve\n **************************************************************/\n\nTHREE.SplineCurve = function (points /* array of Vector2 */) {\n\n  this.points = points == undefined ? [] : points;\n\n};\n\nTHREE.SplineCurve.prototype = Object.create(THREE.Curve.prototype);\nTHREE.SplineCurve.prototype.constructor = THREE.SplineCurve;\n\nTHREE.SplineCurve.prototype.getPoint = function (t) {\n\n  var points = this.points;\n  var point = (points.length - 1) * t;\n\n  var intPoint = Math.floor(point);\n  var weight = point - intPoint;\n\n  var point0 = points[intPoint == 0 ? intPoint : intPoint - 1];\n  var point1 = points[intPoint];\n  var point2 = points[intPoint > points.length - 2 ? points.length - 1 : intPoint + 1];\n  var point3 = points[intPoint > points.length - 3 ? points.length - 1 : intPoint + 2];\n\n  var vector = new THREE.Vector2();\n\n  vector.x = THREE.Curve.Utils.interpolate(point0.x, point1.x, point2.x, point3.x, weight);\n  vector.y = THREE.Curve.Utils.interpolate(point0.y, point1.y, point2.y, point3.y, weight);\n\n  return vector;\n\n};\n\n// File:src/extras/curves/EllipseCurve.js\n\n/**************************************************************\n *\tEllipse curve\n **************************************************************/\n\nTHREE.EllipseCurve = function (aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise) {\n\n  this.aX = aX;\n  this.aY = aY;\n\n  this.xRadius = xRadius;\n  this.yRadius = yRadius;\n\n  this.aStartAngle = aStartAngle;\n  this.aEndAngle = aEndAngle;\n\n  this.aClockwise = aClockwise;\n\n};\n\nTHREE.EllipseCurve.prototype = Object.create(THREE.Curve.prototype);\nTHREE.EllipseCurve.prototype.constructor = THREE.EllipseCurve;\n\nTHREE.EllipseCurve.prototype.getPoint = function (t) {\n\n  var deltaAngle = this.aEndAngle - this.aStartAngle;\n\n  if (deltaAngle < 0) deltaAngle += Math.PI * 2;\n  if (deltaAngle > Math.PI * 2) deltaAngle -= Math.PI * 2;\n\n  var angle;\n\n  if (this.aClockwise === true) {\n\n    angle = this.aEndAngle + (1 - t) * (Math.PI * 2 - deltaAngle);\n\n  } else {\n\n    angle = this.aStartAngle + t * deltaAngle;\n\n  }\n\n  var vector = new THREE.Vector2();\n\n  vector.x = this.aX + this.xRadius * Math.cos(angle);\n  vector.y = this.aY + this.yRadius * Math.sin(angle);\n\n  return vector;\n\n};\n\n// File:src/extras/curves/ArcCurve.js\n\n/**************************************************************\n *\tArc curve\n **************************************************************/\n\nTHREE.ArcCurve = function (aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise) {\n\n  THREE.EllipseCurve.call(this, aX, aY, aRadius, aRadius, aStartAngle, aEndAngle, aClockwise);\n};\n\nTHREE.ArcCurve.prototype = Object.create(THREE.EllipseCurve.prototype);\nTHREE.ArcCurve.prototype.constructor = THREE.ArcCurve;\n\n// File:src/extras/curves/LineCurve3.js\n\n/**************************************************************\n *\tLine3D\n **************************************************************/\n\nTHREE.LineCurve3 = THREE.Curve.create(\n\nfunction (v1, v2) {\n\n  this.v1 = v1;\n  this.v2 = v2;\n\n},\n\nfunction (t) {\n\n  var vector = new THREE.Vector3();\n\n  vector.subVectors(this.v2, this.v1); // diff\n  vector.multiplyScalar(t);\n  vector.add(this.v1);\n\n  return vector;\n\n});\n\n\n\n// File:src/extras/curves/QuadraticBezierCurve3.js\n\n/**************************************************************\n *\tQuadratic Bezier 3D curve\n **************************************************************/\n\nTHREE.QuadraticBezierCurve3 = THREE.Curve.create(\n\nfunction (v0, v1, v2) {\n\n  this.v0 = v0;\n  this.v1 = v1;\n  this.v2 = v2;\n\n},\n\nfunction (t) {\n\n  var vector = new THREE.Vector3();\n\n  vector.x = THREE.Shape.Utils.b2(t, this.v0.x, this.v1.x, this.v2.x);\n  vector.y = THREE.Shape.Utils.b2(t, this.v0.y, this.v1.y, this.v2.y);\n  vector.z = THREE.Shape.Utils.b2(t, this.v0.z, this.v1.z, this.v2.z);\n\n  return vector;\n\n});\n\n\n\n// File:src/extras/curves/CubicBezierCurve3.js\n\n/**************************************************************\n *\tCubic Bezier 3D curve\n **************************************************************/\n\nTHREE.CubicBezierCurve3 = THREE.Curve.create(\n\nfunction (v0, v1, v2, v3) {\n\n  this.v0 = v0;\n  this.v1 = v1;\n  this.v2 = v2;\n  this.v3 = v3;\n\n},\n\nfunction (t) {\n\n  var vector = new THREE.Vector3();\n\n  vector.x = THREE.Shape.Utils.b3(t, this.v0.x, this.v1.x, this.v2.x, this.v3.x);\n  vector.y = THREE.Shape.Utils.b3(t, this.v0.y, this.v1.y, this.v2.y, this.v3.y);\n  vector.z = THREE.Shape.Utils.b3(t, this.v0.z, this.v1.z, this.v2.z, this.v3.z);\n\n  return vector;\n\n});\n\n\n\n// File:src/extras/curves/SplineCurve3.js\n\n/**************************************************************\n *\tSpline 3D curve\n **************************************************************/\n\n\nTHREE.SplineCurve3 = THREE.Curve.create(\n\nfunction (points /* array of Vector3 */) {\n\n  this.points = points == undefined ? [] : points;\n\n},\n\nfunction (t) {\n\n  var points = this.points;\n  var point = (points.length - 1) * t;\n\n  var intPoint = Math.floor(point);\n  var weight = point - intPoint;\n\n  var point0 = points[intPoint == 0 ? intPoint : intPoint - 1];\n  var point1 = points[intPoint];\n  var point2 = points[intPoint > points.length - 2 ? points.length - 1 : intPoint + 1];\n  var point3 = points[intPoint > points.length - 3 ? points.length - 1 : intPoint + 2];\n\n  var vector = new THREE.Vector3();\n\n  vector.x = THREE.Curve.Utils.interpolate(point0.x, point1.x, point2.x, point3.x, weight);\n  vector.y = THREE.Curve.Utils.interpolate(point0.y, point1.y, point2.y, point3.y, weight);\n  vector.z = THREE.Curve.Utils.interpolate(point0.z, point1.z, point2.z, point3.z, weight);\n\n  return vector;\n\n});\n\n\n\n// File:src/extras/curves/ClosedSplineCurve3.js\n\n/**************************************************************\n *\tClosed Spline 3D curve\n **************************************************************/\n\n\nTHREE.ClosedSplineCurve3 = THREE.Curve.create(\n\nfunction (points /* array of Vector3 */) {\n\n  this.points = points == undefined ? [] : points;\n\n},\n\nfunction (t) {\n\n  var points = this.points;\n  var point = (points.length - 0) * t; // This needs to be from 0-length +1\n\n  var intPoint = Math.floor(point);\n  var weight = point - intPoint;\n\n  intPoint += intPoint > 0 ? 0 : (Math.floor(Math.abs(intPoint) / points.length) + 1) * points.length;\n\n  var point0 = points[(intPoint - 1) % points.length];\n  var point1 = points[intPoint % points.length];\n  var point2 = points[(intPoint + 1) % points.length];\n  var point3 = points[(intPoint + 2) % points.length];\n\n  var vector = new THREE.Vector3();\n\n  vector.x = THREE.Curve.Utils.interpolate(point0.x, point1.x, point2.x, point3.x, weight);\n  vector.y = THREE.Curve.Utils.interpolate(point0.y, point1.y, point2.y, point3.y, weight);\n  vector.z = THREE.Curve.Utils.interpolate(point0.z, point1.z, point2.z, point3.z, weight);\n\n  return vector;\n\n});\n\n\n\n// File:src/extras/animation/AnimationHandler.js\n\n/**\n * @author mikael emtinger / http://gomo.se/\n */\n\nTHREE.AnimationHandler = {\n\n  LINEAR: 0,\n  CATMULLROM: 1,\n  CATMULLROM_FORWARD: 2,\n\n  //\n\n  add: function add() {THREE.warn('THREE.AnimationHandler.add() has been deprecated.');},\n  get: function get() {THREE.warn('THREE.AnimationHandler.get() has been deprecated.');},\n  remove: function remove() {THREE.warn('THREE.AnimationHandler.remove() has been deprecated.');},\n\n  //\n\n  animations: [],\n\n  init: function init(data) {\n\n    if (data.initialized === true) return data;\n\n    // loop through all keys\n\n    for (var h = 0; h < data.hierarchy.length; h++) {\n\n      for (var k = 0; k < data.hierarchy[h].keys.length; k++) {\n\n        // remove minus times\n\n        if (data.hierarchy[h].keys[k].time < 0) {\n\n          data.hierarchy[h].keys[k].time = 0;\n\n        }\n\n        // create quaternions\n\n        if (data.hierarchy[h].keys[k].rot !== undefined &&\n        !(data.hierarchy[h].keys[k].rot instanceof THREE.Quaternion)) {\n\n          var quat = data.hierarchy[h].keys[k].rot;\n          data.hierarchy[h].keys[k].rot = new THREE.Quaternion().fromArray(quat);\n\n        }\n\n      }\n\n      // prepare morph target keys\n\n      if (data.hierarchy[h].keys.length && data.hierarchy[h].keys[0].morphTargets !== undefined) {\n\n        // get all used\n\n        var usedMorphTargets = {};\n\n        for (var k = 0; k < data.hierarchy[h].keys.length; k++) {\n\n          for (var m = 0; m < data.hierarchy[h].keys[k].morphTargets.length; m++) {\n\n            var morphTargetName = data.hierarchy[h].keys[k].morphTargets[m];\n            usedMorphTargets[morphTargetName] = -1;\n\n          }\n\n        }\n\n        data.hierarchy[h].usedMorphTargets = usedMorphTargets;\n\n\n        // set all used on all frames\n\n        for (var k = 0; k < data.hierarchy[h].keys.length; k++) {\n\n          var influences = {};\n\n          for (var morphTargetName in usedMorphTargets) {\n\n            for (var m = 0; m < data.hierarchy[h].keys[k].morphTargets.length; m++) {\n\n              if (data.hierarchy[h].keys[k].morphTargets[m] === morphTargetName) {\n\n                influences[morphTargetName] = data.hierarchy[h].keys[k].morphTargetsInfluences[m];\n                break;\n\n              }\n\n            }\n\n            if (m === data.hierarchy[h].keys[k].morphTargets.length) {\n\n              influences[morphTargetName] = 0;\n\n            }\n\n          }\n\n          data.hierarchy[h].keys[k].morphTargetsInfluences = influences;\n\n        }\n\n      }\n\n\n      // remove all keys that are on the same time\n\n      for (var k = 1; k < data.hierarchy[h].keys.length; k++) {\n\n        if (data.hierarchy[h].keys[k].time === data.hierarchy[h].keys[k - 1].time) {\n\n          data.hierarchy[h].keys.splice(k, 1);\n          k--;\n\n        }\n\n      }\n\n\n      // set index\n\n      for (var k = 0; k < data.hierarchy[h].keys.length; k++) {\n\n        data.hierarchy[h].keys[k].index = k;\n\n      }\n\n    }\n\n    data.initialized = true;\n\n    return data;\n\n  },\n\n  parse: function parse(root) {\n\n    var parseRecurseHierarchy = function parseRecurseHierarchy(root, hierarchy) {\n\n      hierarchy.push(root);\n\n      for (var c = 0; c < root.children.length; c++) {\n        parseRecurseHierarchy(root.children[c], hierarchy);}\n\n    };\n\n    // setup hierarchy\n\n    var hierarchy = [];\n\n    if (root instanceof THREE.SkinnedMesh) {\n\n      for (var b = 0; b < root.skeleton.bones.length; b++) {\n\n        hierarchy.push(root.skeleton.bones[b]);\n\n      }\n\n    } else {\n\n      parseRecurseHierarchy(root, hierarchy);\n\n    }\n\n    return hierarchy;\n\n  },\n\n  play: function play(animation) {\n\n    if (this.animations.indexOf(animation) === -1) {\n\n      this.animations.push(animation);\n\n    }\n\n  },\n\n  stop: function stop(animation) {\n\n    var index = this.animations.indexOf(animation);\n\n    if (index !== -1) {\n\n      this.animations.splice(index, 1);\n\n    }\n\n  },\n\n  update: function update(deltaTimeMS) {\n\n    for (var i = 0; i < this.animations.length; i++) {\n\n      this.animations[i].resetBlendWeights();\n\n    }\n\n    for (var i = 0; i < this.animations.length; i++) {\n\n      this.animations[i].update(deltaTimeMS);\n\n    }\n\n  } };\n\n\n\n// File:src/extras/animation/Animation.js\n\n/**\n * @author mikael emtinger / http://gomo.se/\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.Animation = function (root, data) {\n\n  this.root = root;\n  this.data = THREE.AnimationHandler.init(data);\n  this.hierarchy = THREE.AnimationHandler.parse(root);\n\n  this.currentTime = 0;\n  this.timeScale = 1;\n\n  this.isPlaying = false;\n  this.loop = true;\n  this.weight = 0;\n\n  this.interpolationType = THREE.AnimationHandler.LINEAR;\n\n};\n\nTHREE.Animation.prototype = {\n\n  constructor: THREE.Animation,\n\n  keyTypes: [\"pos\", \"rot\", \"scl\"],\n\n  play: function play(startTime, weight) {\n\n    this.currentTime = startTime !== undefined ? startTime : 0;\n    this.weight = weight !== undefined ? weight : 1;\n\n    this.isPlaying = true;\n\n    this.reset();\n\n    THREE.AnimationHandler.play(this);\n\n  },\n\n  stop: function stop() {\n\n    this.isPlaying = false;\n\n    THREE.AnimationHandler.stop(this);\n\n  },\n\n  reset: function reset() {\n\n    for (var h = 0, hl = this.hierarchy.length; h < hl; h++) {\n\n      var object = this.hierarchy[h];\n\n      if (object.animationCache === undefined) {\n\n        object.animationCache = {\n          animations: {},\n          blending: {\n            positionWeight: 0.0,\n            quaternionWeight: 0.0,\n            scaleWeight: 0.0 } };\n\n\n      }\n\n      var name = this.data.name;\n      var animations = object.animationCache.animations;\n      var animationCache = animations[name];\n\n      if (animationCache === undefined) {\n\n        animationCache = {\n          prevKey: { pos: 0, rot: 0, scl: 0 },\n          nextKey: { pos: 0, rot: 0, scl: 0 },\n          originalMatrix: object.matrix };\n\n\n        animations[name] = animationCache;\n\n      }\n\n      // Get keys to match our current time\n\n      for (var t = 0; t < 3; t++) {\n\n        var type = this.keyTypes[t];\n\n        var prevKey = this.data.hierarchy[h].keys[0];\n        var nextKey = this.getNextKeyWith(type, h, 1);\n\n        while (nextKey.time < this.currentTime && nextKey.index > prevKey.index) {\n\n          prevKey = nextKey;\n          nextKey = this.getNextKeyWith(type, h, nextKey.index + 1);\n\n        }\n\n        animationCache.prevKey[type] = prevKey;\n        animationCache.nextKey[type] = nextKey;\n\n      }\n\n    }\n\n  },\n\n  resetBlendWeights: function resetBlendWeights() {\n\n    for (var h = 0, hl = this.hierarchy.length; h < hl; h++) {\n\n      var object = this.hierarchy[h];\n      var animationCache = object.animationCache;\n\n      if (animationCache !== undefined) {\n\n        var blending = animationCache.blending;\n\n        blending.positionWeight = 0.0;\n        blending.quaternionWeight = 0.0;\n        blending.scaleWeight = 0.0;\n\n      }\n\n    }\n\n  },\n\n  update: function () {\n\n    var points = [];\n    var target = new THREE.Vector3();\n    var newVector = new THREE.Vector3();\n    var newQuat = new THREE.Quaternion();\n\n    // Catmull-Rom spline\n\n    var interpolateCatmullRom = function interpolateCatmullRom(points, scale) {\n\n      var c = [],v3 = [],\n      point,intPoint,weight,w2,w3,\n      pa,pb,pc,pd;\n\n      point = (points.length - 1) * scale;\n      intPoint = Math.floor(point);\n      weight = point - intPoint;\n\n      c[0] = intPoint === 0 ? intPoint : intPoint - 1;\n      c[1] = intPoint;\n      c[2] = intPoint > points.length - 2 ? intPoint : intPoint + 1;\n      c[3] = intPoint > points.length - 3 ? intPoint : intPoint + 2;\n\n      pa = points[c[0]];\n      pb = points[c[1]];\n      pc = points[c[2]];\n      pd = points[c[3]];\n\n      w2 = weight * weight;\n      w3 = weight * w2;\n\n      v3[0] = interpolate(pa[0], pb[0], pc[0], pd[0], weight, w2, w3);\n      v3[1] = interpolate(pa[1], pb[1], pc[1], pd[1], weight, w2, w3);\n      v3[2] = interpolate(pa[2], pb[2], pc[2], pd[2], weight, w2, w3);\n\n      return v3;\n\n    };\n\n    var interpolate = function interpolate(p0, p1, p2, p3, t, t2, t3) {\n\n      var v0 = (p2 - p0) * 0.5,\n      v1 = (p3 - p1) * 0.5;\n\n      return (2 * (p1 - p2) + v0 + v1) * t3 + (-3 * (p1 - p2) - 2 * v0 - v1) * t2 + v0 * t + p1;\n\n    };\n\n    return function (delta) {\n\n      if (this.isPlaying === false) return;\n\n      this.currentTime += delta * this.timeScale;\n\n      if (this.weight === 0)\n      return;\n\n      //\n\n      var duration = this.data.length;\n\n      if (this.currentTime > duration || this.currentTime < 0) {\n\n        if (this.loop) {\n\n          this.currentTime %= duration;\n\n          if (this.currentTime < 0)\n          this.currentTime += duration;\n\n          this.reset();\n\n        } else {\n\n          this.stop();\n\n        }\n\n      }\n\n      for (var h = 0, hl = this.hierarchy.length; h < hl; h++) {\n\n        var object = this.hierarchy[h];\n        var animationCache = object.animationCache.animations[this.data.name];\n        var blending = object.animationCache.blending;\n\n        // loop through pos/rot/scl\n\n        for (var t = 0; t < 3; t++) {\n\n          // get keys\n\n          var type = this.keyTypes[t];\n          var prevKey = animationCache.prevKey[type];\n          var nextKey = animationCache.nextKey[type];\n\n          if (this.timeScale > 0 && nextKey.time <= this.currentTime ||\n          this.timeScale < 0 && prevKey.time >= this.currentTime) {\n\n            prevKey = this.data.hierarchy[h].keys[0];\n            nextKey = this.getNextKeyWith(type, h, 1);\n\n            while (nextKey.time < this.currentTime && nextKey.index > prevKey.index) {\n\n              prevKey = nextKey;\n              nextKey = this.getNextKeyWith(type, h, nextKey.index + 1);\n\n            }\n\n            animationCache.prevKey[type] = prevKey;\n            animationCache.nextKey[type] = nextKey;\n\n          }\n\n          var scale = (this.currentTime - prevKey.time) / (nextKey.time - prevKey.time);\n\n          var prevXYZ = prevKey[type];\n          var nextXYZ = nextKey[type];\n\n          if (scale < 0) scale = 0;\n          if (scale > 1) scale = 1;\n\n          // interpolate\n\n          if (type === \"pos\") {\n\n            if (this.interpolationType === THREE.AnimationHandler.LINEAR) {\n\n              newVector.x = prevXYZ[0] + (nextXYZ[0] - prevXYZ[0]) * scale;\n              newVector.y = prevXYZ[1] + (nextXYZ[1] - prevXYZ[1]) * scale;\n              newVector.z = prevXYZ[2] + (nextXYZ[2] - prevXYZ[2]) * scale;\n\n              // blend\n              var proportionalWeight = this.weight / (this.weight + blending.positionWeight);\n              object.position.lerp(newVector, proportionalWeight);\n              blending.positionWeight += this.weight;\n\n            } else if (this.interpolationType === THREE.AnimationHandler.CATMULLROM ||\n            this.interpolationType === THREE.AnimationHandler.CATMULLROM_FORWARD) {\n\n              points[0] = this.getPrevKeyWith(\"pos\", h, prevKey.index - 1)[\"pos\"];\n              points[1] = prevXYZ;\n              points[2] = nextXYZ;\n              points[3] = this.getNextKeyWith(\"pos\", h, nextKey.index + 1)[\"pos\"];\n\n              scale = scale * 0.33 + 0.33;\n\n              var currentPoint = interpolateCatmullRom(points, scale);\n              var proportionalWeight = this.weight / (this.weight + blending.positionWeight);\n              blending.positionWeight += this.weight;\n\n              // blend\n\n              var vector = object.position;\n\n              vector.x = vector.x + (currentPoint[0] - vector.x) * proportionalWeight;\n              vector.y = vector.y + (currentPoint[1] - vector.y) * proportionalWeight;\n              vector.z = vector.z + (currentPoint[2] - vector.z) * proportionalWeight;\n\n              if (this.interpolationType === THREE.AnimationHandler.CATMULLROM_FORWARD) {\n\n                var forwardPoint = interpolateCatmullRom(points, scale * 1.01);\n\n                target.set(forwardPoint[0], forwardPoint[1], forwardPoint[2]);\n                target.sub(vector);\n                target.y = 0;\n                target.normalize();\n\n                var angle = Math.atan2(target.x, target.z);\n                object.rotation.set(0, angle, 0);\n\n              }\n\n            }\n\n          } else if (type === \"rot\") {\n\n            THREE.Quaternion.slerp(prevXYZ, nextXYZ, newQuat, scale);\n\n            // Avoid paying the cost of an additional slerp if we don't have to\n            if (blending.quaternionWeight === 0) {\n\n              object.quaternion.copy(newQuat);\n              blending.quaternionWeight = this.weight;\n\n            } else {\n\n              var proportionalWeight = this.weight / (this.weight + blending.quaternionWeight);\n              THREE.Quaternion.slerp(object.quaternion, newQuat, object.quaternion, proportionalWeight);\n              blending.quaternionWeight += this.weight;\n\n            }\n\n          } else if (type === \"scl\") {\n\n            newVector.x = prevXYZ[0] + (nextXYZ[0] - prevXYZ[0]) * scale;\n            newVector.y = prevXYZ[1] + (nextXYZ[1] - prevXYZ[1]) * scale;\n            newVector.z = prevXYZ[2] + (nextXYZ[2] - prevXYZ[2]) * scale;\n\n            var proportionalWeight = this.weight / (this.weight + blending.scaleWeight);\n            object.scale.lerp(newVector, proportionalWeight);\n            blending.scaleWeight += this.weight;\n\n          }\n\n        }\n\n      }\n\n      return true;\n\n    };\n\n  }(),\n\n  getNextKeyWith: function getNextKeyWith(type, h, key) {\n\n    var keys = this.data.hierarchy[h].keys;\n\n    if (this.interpolationType === THREE.AnimationHandler.CATMULLROM ||\n    this.interpolationType === THREE.AnimationHandler.CATMULLROM_FORWARD) {\n\n      key = key < keys.length - 1 ? key : keys.length - 1;\n\n    } else {\n\n      key = key % keys.length;\n\n    }\n\n    for (; key < keys.length; key++) {\n\n      if (keys[key][type] !== undefined) {\n\n        return keys[key];\n\n      }\n\n    }\n\n    return this.data.hierarchy[h].keys[0];\n\n  },\n\n  getPrevKeyWith: function getPrevKeyWith(type, h, key) {\n\n    var keys = this.data.hierarchy[h].keys;\n\n    if (this.interpolationType === THREE.AnimationHandler.CATMULLROM ||\n    this.interpolationType === THREE.AnimationHandler.CATMULLROM_FORWARD) {\n\n      key = key > 0 ? key : 0;\n\n    } else {\n\n      key = key >= 0 ? key : key + keys.length;\n\n    }\n\n\n    for (; key >= 0; key--) {\n\n      if (keys[key][type] !== undefined) {\n\n        return keys[key];\n\n      }\n\n    }\n\n    return this.data.hierarchy[h].keys[keys.length - 1];\n\n  } };\n\n\n\n// File:src/extras/animation/KeyFrameAnimation.js\n\n/**\n * @author mikael emtinger / http://gomo.se/\n * @author mrdoob / http://mrdoob.com/\n * @author alteredq / http://alteredqualia.com/\n * @author khang duong\n * @author erik kitson\n */\n\nTHREE.KeyFrameAnimation = function (data) {\n\n  this.root = data.node;\n  this.data = THREE.AnimationHandler.init(data);\n  this.hierarchy = THREE.AnimationHandler.parse(this.root);\n  this.currentTime = 0;\n  this.timeScale = 0.001;\n  this.isPlaying = false;\n  this.isPaused = true;\n  this.loop = true;\n\n  // initialize to first keyframes\n\n  for (var h = 0, hl = this.hierarchy.length; h < hl; h++) {\n\n    var keys = this.data.hierarchy[h].keys,\n    sids = this.data.hierarchy[h].sids,\n    obj = this.hierarchy[h];\n\n    if (keys.length && sids) {\n\n      for (var s = 0; s < sids.length; s++) {\n\n        var sid = sids[s],\n        next = this.getNextKeyWith(sid, h, 0);\n\n        if (next) {\n\n          next.apply(sid);\n\n        }\n\n      }\n\n      obj.matrixAutoUpdate = false;\n      this.data.hierarchy[h].node.updateMatrix();\n      obj.matrixWorldNeedsUpdate = true;\n\n    }\n\n  }\n\n};\n\nTHREE.KeyFrameAnimation.prototype = {\n\n  constructor: THREE.KeyFrameAnimation,\n\n  play: function play(startTime) {\n\n    this.currentTime = startTime !== undefined ? startTime : 0;\n\n    if (this.isPlaying === false) {\n\n      this.isPlaying = true;\n\n      // reset key cache\n\n      var h,hl = this.hierarchy.length,\n      object,\n      node;\n\n      for (h = 0; h < hl; h++) {\n\n        object = this.hierarchy[h];\n        node = this.data.hierarchy[h];\n\n        if (node.animationCache === undefined) {\n\n          node.animationCache = {};\n          node.animationCache.prevKey = null;\n          node.animationCache.nextKey = null;\n          node.animationCache.originalMatrix = object.matrix;\n\n        }\n\n        var keys = this.data.hierarchy[h].keys;\n\n        if (keys.length) {\n\n          node.animationCache.prevKey = keys[0];\n          node.animationCache.nextKey = keys[1];\n\n          this.startTime = Math.min(keys[0].time, this.startTime);\n          this.endTime = Math.max(keys[keys.length - 1].time, this.endTime);\n\n        }\n\n      }\n\n      this.update(0);\n\n    }\n\n    this.isPaused = false;\n\n    THREE.AnimationHandler.play(this);\n\n  },\n\n  stop: function stop() {\n\n    this.isPlaying = false;\n    this.isPaused = false;\n\n    THREE.AnimationHandler.stop(this);\n\n    // reset JIT matrix and remove cache\n\n    for (var h = 0; h < this.data.hierarchy.length; h++) {\n\n      var obj = this.hierarchy[h];\n      var node = this.data.hierarchy[h];\n\n      if (node.animationCache !== undefined) {\n\n        var original = node.animationCache.originalMatrix;\n\n        original.copy(obj.matrix);\n        obj.matrix = original;\n\n        delete node.animationCache;\n\n      }\n\n    }\n\n  },\n\n  update: function update(delta) {\n\n    if (this.isPlaying === false) return;\n\n    this.currentTime += delta * this.timeScale;\n\n    //\n\n    var duration = this.data.length;\n\n    if (this.loop === true && this.currentTime > duration) {\n\n      this.currentTime %= duration;\n\n    }\n\n    this.currentTime = Math.min(this.currentTime, duration);\n\n    for (var h = 0, hl = this.hierarchy.length; h < hl; h++) {\n\n      var object = this.hierarchy[h];\n      var node = this.data.hierarchy[h];\n\n      var keys = node.keys,\n      animationCache = node.animationCache;\n\n\n      if (keys.length) {\n\n        var prevKey = animationCache.prevKey;\n        var nextKey = animationCache.nextKey;\n\n        if (nextKey.time <= this.currentTime) {\n\n          while (nextKey.time < this.currentTime && nextKey.index > prevKey.index) {\n\n            prevKey = nextKey;\n            nextKey = keys[prevKey.index + 1];\n\n          }\n\n          animationCache.prevKey = prevKey;\n          animationCache.nextKey = nextKey;\n\n        }\n\n        if (nextKey.time >= this.currentTime) {\n\n          prevKey.interpolate(nextKey, this.currentTime);\n\n        } else {\n\n          prevKey.interpolate(nextKey, nextKey.time);\n\n        }\n\n        this.data.hierarchy[h].node.updateMatrix();\n        object.matrixWorldNeedsUpdate = true;\n\n      }\n\n    }\n\n  },\n\n  getNextKeyWith: function getNextKeyWith(sid, h, key) {\n\n    var keys = this.data.hierarchy[h].keys;\n    key = key % keys.length;\n\n    for (; key < keys.length; key++) {\n\n      if (keys[key].hasTarget(sid)) {\n\n        return keys[key];\n\n      }\n\n    }\n\n    return keys[0];\n\n  },\n\n  getPrevKeyWith: function getPrevKeyWith(sid, h, key) {\n\n    var keys = this.data.hierarchy[h].keys;\n    key = key >= 0 ? key : key + keys.length;\n\n    for (; key >= 0; key--) {\n\n      if (keys[key].hasTarget(sid)) {\n\n        return keys[key];\n\n      }\n\n    }\n\n    return keys[keys.length - 1];\n\n  } };\n\n\n\n// File:src/extras/animation/MorphAnimation.js\n\n/**\n * @author mrdoob / http://mrdoob.com\n * @author willy-vvu / http://willy-vvu.github.io\n */\n\nTHREE.MorphAnimation = function (mesh) {\n\n  this.mesh = mesh;\n  this.frames = mesh.morphTargetInfluences.length;\n  this.currentTime = 0;\n  this.duration = 1000;\n  this.loop = true;\n  this.lastFrame = 0;\n  this.currentFrame = 0;\n\n  this.isPlaying = false;\n\n};\n\nTHREE.MorphAnimation.prototype = {\n\n  constructor: THREE.MorphAnimation,\n\n  play: function play() {\n\n    this.isPlaying = true;\n\n  },\n\n  pause: function pause() {\n\n    this.isPlaying = false;\n\n  },\n\n  update: function update(delta) {\n\n    if (this.isPlaying === false) return;\n\n    this.currentTime += delta;\n\n    if (this.loop === true && this.currentTime > this.duration) {\n\n      this.currentTime %= this.duration;\n\n    }\n\n    this.currentTime = Math.min(this.currentTime, this.duration);\n\n    var interpolation = this.duration / this.frames;\n    var frame = Math.floor(this.currentTime / interpolation);\n\n    var influences = this.mesh.morphTargetInfluences;\n\n    if (frame != this.currentFrame) {\n\n      influences[this.lastFrame] = 0;\n      influences[this.currentFrame] = 1;\n      influences[frame] = 0;\n\n      this.lastFrame = this.currentFrame;\n      this.currentFrame = frame;\n\n    }\n\n    influences[frame] = this.currentTime % interpolation / interpolation;\n    influences[this.lastFrame] = 1 - influences[frame];\n\n  } };\n\n\n\n// File:src/extras/geometries/BoxGeometry.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * based on http://papervision3d.googlecode.com/svn/trunk/as3/trunk/src/org/papervision3d/objects/primitives/Cube.as\n */\n\nTHREE.BoxGeometry = function (width, height, depth, widthSegments, heightSegments, depthSegments) {\n\n  THREE.Geometry.call(this);\n\n  this.type = 'BoxGeometry';\n\n  this.parameters = {\n    width: width,\n    height: height,\n    depth: depth,\n    widthSegments: widthSegments,\n    heightSegments: heightSegments,\n    depthSegments: depthSegments };\n\n\n  this.widthSegments = widthSegments || 1;\n  this.heightSegments = heightSegments || 1;\n  this.depthSegments = depthSegments || 1;\n\n  var scope = this;\n\n  var width_half = width / 2;\n  var height_half = height / 2;\n  var depth_half = depth / 2;\n\n  buildPlane('z', 'y', -1, -1, depth, height, width_half, 0); // px\n  buildPlane('z', 'y', 1, -1, depth, height, -width_half, 1); // nx\n  buildPlane('x', 'z', 1, 1, width, depth, height_half, 2); // py\n  buildPlane('x', 'z', 1, -1, width, depth, -height_half, 3); // ny\n  buildPlane('x', 'y', 1, -1, width, height, depth_half, 4); // pz\n  buildPlane('x', 'y', -1, -1, width, height, -depth_half, 5); // nz\n\n  function buildPlane(u, v, udir, vdir, width, height, depth, materialIndex) {\n\n    var w,ix,iy,\n    gridX = scope.widthSegments,\n    gridY = scope.heightSegments,\n    width_half = width / 2,\n    height_half = height / 2,\n    offset = scope.vertices.length;\n\n    if (u === 'x' && v === 'y' || u === 'y' && v === 'x') {\n\n      w = 'z';\n\n    } else if (u === 'x' && v === 'z' || u === 'z' && v === 'x') {\n\n      w = 'y';\n      gridY = scope.depthSegments;\n\n    } else if (u === 'z' && v === 'y' || u === 'y' && v === 'z') {\n\n      w = 'x';\n      gridX = scope.depthSegments;\n\n    }\n\n    var gridX1 = gridX + 1,\n    gridY1 = gridY + 1,\n    segment_width = width / gridX,\n    segment_height = height / gridY,\n    normal = new THREE.Vector3();\n\n    normal[w] = depth > 0 ? 1 : -1;\n\n    for (iy = 0; iy < gridY1; iy++) {\n\n      for (ix = 0; ix < gridX1; ix++) {\n\n        var vector = new THREE.Vector3();\n        vector[u] = (ix * segment_width - width_half) * udir;\n        vector[v] = (iy * segment_height - height_half) * vdir;\n        vector[w] = depth;\n\n        scope.vertices.push(vector);\n\n      }\n\n    }\n\n    for (iy = 0; iy < gridY; iy++) {\n\n      for (ix = 0; ix < gridX; ix++) {\n\n        var a = ix + gridX1 * iy;\n        var b = ix + gridX1 * (iy + 1);\n        var c = ix + 1 + gridX1 * (iy + 1);\n        var d = ix + 1 + gridX1 * iy;\n\n        var uva = new THREE.Vector2(ix / gridX, 1 - iy / gridY);\n        var uvb = new THREE.Vector2(ix / gridX, 1 - (iy + 1) / gridY);\n        var uvc = new THREE.Vector2((ix + 1) / gridX, 1 - (iy + 1) / gridY);\n        var uvd = new THREE.Vector2((ix + 1) / gridX, 1 - iy / gridY);\n\n        var face = new THREE.Face3(a + offset, b + offset, d + offset);\n        face.normal.copy(normal);\n        face.vertexNormals.push(normal.clone(), normal.clone(), normal.clone());\n        face.materialIndex = materialIndex;\n\n        scope.faces.push(face);\n        scope.faceVertexUvs[0].push([uva, uvb, uvd]);\n\n        face = new THREE.Face3(b + offset, c + offset, d + offset);\n        face.normal.copy(normal);\n        face.vertexNormals.push(normal.clone(), normal.clone(), normal.clone());\n        face.materialIndex = materialIndex;\n\n        scope.faces.push(face);\n        scope.faceVertexUvs[0].push([uvb.clone(), uvc, uvd.clone()]);\n\n      }\n\n    }\n\n  }\n\n  this.mergeVertices();\n\n};\n\nTHREE.BoxGeometry.prototype = Object.create(THREE.Geometry.prototype);\nTHREE.BoxGeometry.prototype.constructor = THREE.BoxGeometry;\n\n// File:src/extras/geometries/CircleGeometry.js\n\n/**\n * @author hughes\n */\n\nTHREE.CircleGeometry = function (radius, segments, thetaStart, thetaLength) {\n\n  THREE.Geometry.call(this);\n\n  this.type = 'CircleGeometry';\n\n  this.parameters = {\n    radius: radius,\n    segments: segments,\n    thetaStart: thetaStart,\n    thetaLength: thetaLength };\n\n\n  radius = radius || 50;\n  segments = segments !== undefined ? Math.max(3, segments) : 8;\n\n  thetaStart = thetaStart !== undefined ? thetaStart : 0;\n  thetaLength = thetaLength !== undefined ? thetaLength : Math.PI * 2;\n\n  var i,uvs = [],\n  center = new THREE.Vector3(),centerUV = new THREE.Vector2(0.5, 0.5);\n\n  this.vertices.push(center);\n  uvs.push(centerUV);\n\n  for (i = 0; i <= segments; i++) {\n\n    var vertex = new THREE.Vector3();\n    var segment = thetaStart + i / segments * thetaLength;\n\n    vertex.x = radius * Math.cos(segment);\n    vertex.y = radius * Math.sin(segment);\n\n    this.vertices.push(vertex);\n    uvs.push(new THREE.Vector2((vertex.x / radius + 1) / 2, (vertex.y / radius + 1) / 2));\n\n  }\n\n  var n = new THREE.Vector3(0, 0, 1);\n\n  for (i = 1; i <= segments; i++) {\n\n    this.faces.push(new THREE.Face3(i, i + 1, 0, [n.clone(), n.clone(), n.clone()]));\n    this.faceVertexUvs[0].push([uvs[i].clone(), uvs[i + 1].clone(), centerUV.clone()]);\n\n  }\n\n  this.computeFaceNormals();\n\n  this.boundingSphere = new THREE.Sphere(new THREE.Vector3(), radius);\n\n};\n\nTHREE.CircleGeometry.prototype = Object.create(THREE.Geometry.prototype);\nTHREE.CircleGeometry.prototype.constructor = THREE.CircleGeometry;\n\n// File:src/extras/geometries/CubeGeometry.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\n\nTHREE.CubeGeometry = function (width, height, depth, widthSegments, heightSegments, depthSegments) {\n\n  THREE.warn('THREE.CubeGeometry has been renamed to THREE.BoxGeometry.');\n  return new THREE.BoxGeometry(width, height, depth, widthSegments, heightSegments, depthSegments);\n\n};\n\n// File:src/extras/geometries/CylinderGeometry.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.CylinderGeometry = function (radiusTop, radiusBottom, height, radialSegments, heightSegments, openEnded, thetaStart, thetaLength) {\n\n  THREE.Geometry.call(this);\n\n  this.type = 'CylinderGeometry';\n\n  this.parameters = {\n    radiusTop: radiusTop,\n    radiusBottom: radiusBottom,\n    height: height,\n    radialSegments: radialSegments,\n    heightSegments: heightSegments,\n    openEnded: openEnded,\n    thetaStart: thetaStart,\n    thetaLength: thetaLength };\n\n\n  radiusTop = radiusTop !== undefined ? radiusTop : 20;\n  radiusBottom = radiusBottom !== undefined ? radiusBottom : 20;\n  height = height !== undefined ? height : 100;\n\n  radialSegments = radialSegments || 8;\n  heightSegments = heightSegments || 1;\n\n  openEnded = openEnded !== undefined ? openEnded : false;\n  thetaStart = thetaStart !== undefined ? thetaStart : 0;\n  thetaLength = thetaLength !== undefined ? thetaLength : 2 * Math.PI;\n\n  var heightHalf = height / 2;\n\n  var x,y,vertices = [],uvs = [];\n\n  for (y = 0; y <= heightSegments; y++) {\n\n    var verticesRow = [];\n    var uvsRow = [];\n\n    var v = y / heightSegments;\n    var radius = v * (radiusBottom - radiusTop) + radiusTop;\n\n    for (x = 0; x <= radialSegments; x++) {\n\n      var u = x / radialSegments;\n\n      var vertex = new THREE.Vector3();\n      vertex.x = radius * Math.sin(u * thetaLength + thetaStart);\n      vertex.y = -v * height + heightHalf;\n      vertex.z = radius * Math.cos(u * thetaLength + thetaStart);\n\n      this.vertices.push(vertex);\n\n      verticesRow.push(this.vertices.length - 1);\n      uvsRow.push(new THREE.Vector2(u, 1 - v));\n\n    }\n\n    vertices.push(verticesRow);\n    uvs.push(uvsRow);\n\n  }\n\n  var tanTheta = (radiusBottom - radiusTop) / height;\n  var na, nb;\n\n  for (x = 0; x < radialSegments; x++) {\n\n    if (radiusTop !== 0) {\n\n      na = this.vertices[vertices[0][x]].clone();\n      nb = this.vertices[vertices[0][x + 1]].clone();\n\n    } else {\n\n      na = this.vertices[vertices[1][x]].clone();\n      nb = this.vertices[vertices[1][x + 1]].clone();\n\n    }\n\n    na.setY(Math.sqrt(na.x * na.x + na.z * na.z) * tanTheta).normalize();\n    nb.setY(Math.sqrt(nb.x * nb.x + nb.z * nb.z) * tanTheta).normalize();\n\n    for (y = 0; y < heightSegments; y++) {\n\n      var v1 = vertices[y][x];\n      var v2 = vertices[y + 1][x];\n      var v3 = vertices[y + 1][x + 1];\n      var v4 = vertices[y][x + 1];\n\n      var n1 = na.clone();\n      var n2 = na.clone();\n      var n3 = nb.clone();\n      var n4 = nb.clone();\n\n      var uv1 = uvs[y][x].clone();\n      var uv2 = uvs[y + 1][x].clone();\n      var uv3 = uvs[y + 1][x + 1].clone();\n      var uv4 = uvs[y][x + 1].clone();\n\n      this.faces.push(new THREE.Face3(v1, v2, v4, [n1, n2, n4]));\n      this.faceVertexUvs[0].push([uv1, uv2, uv4]);\n\n      this.faces.push(new THREE.Face3(v2, v3, v4, [n2.clone(), n3, n4.clone()]));\n      this.faceVertexUvs[0].push([uv2.clone(), uv3, uv4.clone()]);\n\n    }\n\n  }\n\n  // top cap\n\n  if (openEnded === false && radiusTop > 0) {\n\n    this.vertices.push(new THREE.Vector3(0, heightHalf, 0));\n\n    for (x = 0; x < radialSegments; x++) {\n\n      var v1 = vertices[0][x];\n      var v2 = vertices[0][x + 1];\n      var v3 = this.vertices.length - 1;\n\n      var n1 = new THREE.Vector3(0, 1, 0);\n      var n2 = new THREE.Vector3(0, 1, 0);\n      var n3 = new THREE.Vector3(0, 1, 0);\n\n      var uv1 = uvs[0][x].clone();\n      var uv2 = uvs[0][x + 1].clone();\n      var uv3 = new THREE.Vector2(uv2.x, 0);\n\n      this.faces.push(new THREE.Face3(v1, v2, v3, [n1, n2, n3]));\n      this.faceVertexUvs[0].push([uv1, uv2, uv3]);\n\n    }\n\n  }\n\n  // bottom cap\n\n  if (openEnded === false && radiusBottom > 0) {\n\n    this.vertices.push(new THREE.Vector3(0, -heightHalf, 0));\n\n    for (x = 0; x < radialSegments; x++) {\n\n      var v1 = vertices[heightSegments][x + 1];\n      var v2 = vertices[heightSegments][x];\n      var v3 = this.vertices.length - 1;\n\n      var n1 = new THREE.Vector3(0, -1, 0);\n      var n2 = new THREE.Vector3(0, -1, 0);\n      var n3 = new THREE.Vector3(0, -1, 0);\n\n      var uv1 = uvs[heightSegments][x + 1].clone();\n      var uv2 = uvs[heightSegments][x].clone();\n      var uv3 = new THREE.Vector2(uv2.x, 1);\n\n      this.faces.push(new THREE.Face3(v1, v2, v3, [n1, n2, n3]));\n      this.faceVertexUvs[0].push([uv1, uv2, uv3]);\n\n    }\n\n  }\n\n  this.computeFaceNormals();\n\n};\n\nTHREE.CylinderGeometry.prototype = Object.create(THREE.Geometry.prototype);\nTHREE.CylinderGeometry.prototype.constructor = THREE.CylinderGeometry;\n\n// File:src/extras/geometries/ExtrudeGeometry.js\n\n/**\n * @author zz85 / http://www.lab4games.net/zz85/blog\n *\n * Creates extruded geometry from a path shape.\n *\n * parameters = {\n *\n *  curveSegments: <int>, // number of points on the curves\n *  steps: <int>, // number of points for z-side extrusions / used for subdividing segements of extrude spline too\n *  amount: <int>, // Depth to extrude the shape\n *\n *  bevelEnabled: <bool>, // turn on bevel\n *  bevelThickness: <float>, // how deep into the original shape bevel goes\n *  bevelSize: <float>, // how far from shape outline is bevel\n *  bevelSegments: <int>, // number of bevel layers\n *\n *  extrudePath: <THREE.CurvePath> // 3d spline path to extrude shape along. (creates Frames if .frames aren't defined)\n *  frames: <THREE.TubeGeometry.FrenetFrames> // containing arrays of tangents, normals, binormals\n *\n *  material: <int> // material index for front and back faces\n *  extrudeMaterial: <int> // material index for extrusion and beveled faces\n *  uvGenerator: <Object> // object that provides UV generator functions\n *\n * }\n **/\n\nTHREE.ExtrudeGeometry = function (shapes, options) {\n\n  if (typeof shapes === \"undefined\") {\n    shapes = [];\n    return;\n  }\n\n  THREE.Geometry.call(this);\n\n  this.type = 'ExtrudeGeometry';\n\n  shapes = shapes instanceof Array ? shapes : [shapes];\n\n  this.addShapeList(shapes, options);\n\n  this.computeFaceNormals();\n\n  // can't really use automatic vertex normals\n  // as then front and back sides get smoothed too\n  // should do separate smoothing just for sides\n\n  //this.computeVertexNormals();\n\n  //console.log( \"took\", ( Date.now() - startTime ) );\n\n};\n\nTHREE.ExtrudeGeometry.prototype = Object.create(THREE.Geometry.prototype);\nTHREE.ExtrudeGeometry.prototype.constructor = THREE.ExtrudeGeometry;\n\nTHREE.ExtrudeGeometry.prototype.addShapeList = function (shapes, options) {\n  var sl = shapes.length;\n\n  for (var s = 0; s < sl; s++) {\n    var shape = shapes[s];\n    this.addShape(shape, options);\n  }\n};\n\nTHREE.ExtrudeGeometry.prototype.addShape = function (shape, options) {\n\n  var amount = options.amount !== undefined ? options.amount : 100;\n\n  var bevelThickness = options.bevelThickness !== undefined ? options.bevelThickness : 6; // 10\n  var bevelSize = options.bevelSize !== undefined ? options.bevelSize : bevelThickness - 2; // 8\n  var bevelSegments = options.bevelSegments !== undefined ? options.bevelSegments : 3;\n\n  var bevelEnabled = options.bevelEnabled !== undefined ? options.bevelEnabled : true; // false\n\n  var curveSegments = options.curveSegments !== undefined ? options.curveSegments : 12;\n\n  var steps = options.steps !== undefined ? options.steps : 1;\n\n  var extrudePath = options.extrudePath;\n  var extrudePts,extrudeByPath = false;\n\n  var material = options.material;\n  var extrudeMaterial = options.extrudeMaterial;\n\n  // Use default WorldUVGenerator if no UV generators are specified.\n  var uvgen = options.UVGenerator !== undefined ? options.UVGenerator : THREE.ExtrudeGeometry.WorldUVGenerator;\n\n  var splineTube, binormal, normal, position2;\n  if (extrudePath) {\n\n    extrudePts = extrudePath.getSpacedPoints(steps);\n\n    extrudeByPath = true;\n    bevelEnabled = false; // bevels not supported for path extrusion\n\n    // SETUP TNB variables\n\n    // Reuse TNB from TubeGeometry for now.\n    // TODO1 - have a .isClosed in spline?\n\n    splineTube = options.frames !== undefined ? options.frames : new THREE.TubeGeometry.FrenetFrames(extrudePath, steps, false);\n\n    // console.log(splineTube, 'splineTube', splineTube.normals.length, 'steps', steps, 'extrudePts', extrudePts.length);\n\n    binormal = new THREE.Vector3();\n    normal = new THREE.Vector3();\n    position2 = new THREE.Vector3();\n\n  }\n\n  // Safeguards if bevels are not enabled\n\n  if (!bevelEnabled) {\n\n    bevelSegments = 0;\n    bevelThickness = 0;\n    bevelSize = 0;\n\n  }\n\n  // Variables initalization\n\n  var ahole, h, hl; // looping of holes\n  var scope = this;\n\n  var shapesOffset = this.vertices.length;\n\n  var shapePoints = shape.extractPoints(curveSegments);\n\n  var vertices = shapePoints.shape;\n  var holes = shapePoints.holes;\n\n  var reverse = !THREE.Shape.Utils.isClockWise(vertices);\n\n  if (reverse) {\n\n    vertices = vertices.reverse();\n\n    // Maybe we should also check if holes are in the opposite direction, just to be safe ...\n\n    for (h = 0, hl = holes.length; h < hl; h++) {\n\n      ahole = holes[h];\n\n      if (THREE.Shape.Utils.isClockWise(ahole)) {\n\n        holes[h] = ahole.reverse();\n\n      }\n\n    }\n\n    reverse = false; // If vertices are in order now, we shouldn't need to worry about them again (hopefully)!\n\n  }\n\n\n  var faces = THREE.Shape.Utils.triangulateShape(vertices, holes);\n\n  /* Vertices */\n\n  var contour = vertices; // vertices has all points but contour has only points of circumference\n\n  for (h = 0, hl = holes.length; h < hl; h++) {\n\n    ahole = holes[h];\n\n    vertices = vertices.concat(ahole);\n\n  }\n\n\n  function scalePt2(pt, vec, size) {\n\n    if (!vec) THREE.error(\"THREE.ExtrudeGeometry: vec does not exist\");\n\n    return vec.clone().multiplyScalar(size).add(pt);\n\n  }\n\n  var b,bs,t,z,\n  vert,vlen = vertices.length,\n  face,flen = faces.length;\n\n\n  // Find directions for point movement\n\n\n  function getBevelVec(inPt, inPrev, inNext) {\n\n    var EPSILON = 0.0000000001;\n\n    // computes for inPt the corresponding point inPt' on a new contour\n    //   shiftet by 1 unit (length of normalized vector) to the left\n    // if we walk along contour clockwise, this new contour is outside the old one\n    //\n    // inPt' is the intersection of the two lines parallel to the two\n    //  adjacent edges of inPt at a distance of 1 unit on the left side.\n\n    var v_trans_x,v_trans_y,shrink_by = 1; // resulting translation vector for inPt\n\n    // good reading for geometry algorithms (here: line-line intersection)\n    // http://geomalgorithms.com/a05-_intersect-1.html\n\n    var v_prev_x = inPt.x - inPrev.x,v_prev_y = inPt.y - inPrev.y;\n    var v_next_x = inNext.x - inPt.x,v_next_y = inNext.y - inPt.y;\n\n    var v_prev_lensq = v_prev_x * v_prev_x + v_prev_y * v_prev_y;\n\n    // check for colinear edges\n    var colinear0 = v_prev_x * v_next_y - v_prev_y * v_next_x;\n\n    if (Math.abs(colinear0) > EPSILON) {// not colinear\n\n      // length of vectors for normalizing\n\n      var v_prev_len = Math.sqrt(v_prev_lensq);\n      var v_next_len = Math.sqrt(v_next_x * v_next_x + v_next_y * v_next_y);\n\n      // shift adjacent points by unit vectors to the left\n\n      var ptPrevShift_x = inPrev.x - v_prev_y / v_prev_len;\n      var ptPrevShift_y = inPrev.y + v_prev_x / v_prev_len;\n\n      var ptNextShift_x = inNext.x - v_next_y / v_next_len;\n      var ptNextShift_y = inNext.y + v_next_x / v_next_len;\n\n      // scaling factor for v_prev to intersection point\n\n      var sf = ((ptNextShift_x - ptPrevShift_x) * v_next_y -\n      (ptNextShift_y - ptPrevShift_y) * v_next_x) / (\n      v_prev_x * v_next_y - v_prev_y * v_next_x);\n\n      // vector from inPt to intersection point\n\n      v_trans_x = ptPrevShift_x + v_prev_x * sf - inPt.x;\n      v_trans_y = ptPrevShift_y + v_prev_y * sf - inPt.y;\n\n      // Don't normalize!, otherwise sharp corners become ugly\n      //  but prevent crazy spikes\n      var v_trans_lensq = v_trans_x * v_trans_x + v_trans_y * v_trans_y;\n      if (v_trans_lensq <= 2) {\n        return new THREE.Vector2(v_trans_x, v_trans_y);\n      } else {\n        shrink_by = Math.sqrt(v_trans_lensq / 2);\n      }\n\n    } else {// handle special case of colinear edges\n\n      var direction_eq = false; // assumes: opposite\n      if (v_prev_x > EPSILON) {\n        if (v_next_x > EPSILON) {direction_eq = true;}\n      } else {\n        if (v_prev_x < -EPSILON) {\n          if (v_next_x < -EPSILON) {direction_eq = true;}\n        } else {\n          if (Math.sign(v_prev_y) == Math.sign(v_next_y)) {direction_eq = true;}\n        }\n      }\n\n      if (direction_eq) {\n        // console.log(\"Warning: lines are a straight sequence\");\n        v_trans_x = -v_prev_y;\n        v_trans_y = v_prev_x;\n        shrink_by = Math.sqrt(v_prev_lensq);\n      } else {\n        // console.log(\"Warning: lines are a straight spike\");\n        v_trans_x = v_prev_x;\n        v_trans_y = v_prev_y;\n        shrink_by = Math.sqrt(v_prev_lensq / 2);\n      }\n\n    }\n\n    return new THREE.Vector2(v_trans_x / shrink_by, v_trans_y / shrink_by);\n\n  }\n\n\n  var contourMovements = [];\n\n  for (var i = 0, il = contour.length, j = il - 1, k = i + 1; i < il; i++, j++, k++) {\n\n    if (j === il) j = 0;\n    if (k === il) k = 0;\n\n    //  (j)---(i)---(k)\n    // console.log('i,j,k', i, j , k)\n\n    contourMovements[i] = getBevelVec(contour[i], contour[j], contour[k]);\n\n  }\n\n  var holesMovements = [],oneHoleMovements,verticesMovements = contourMovements.concat();\n\n  for (h = 0, hl = holes.length; h < hl; h++) {\n\n    ahole = holes[h];\n\n    oneHoleMovements = [];\n\n    for (i = 0, il = ahole.length, j = il - 1, k = i + 1; i < il; i++, j++, k++) {\n\n      if (j === il) j = 0;\n      if (k === il) k = 0;\n\n      //  (j)---(i)---(k)\n      oneHoleMovements[i] = getBevelVec(ahole[i], ahole[j], ahole[k]);\n\n    }\n\n    holesMovements.push(oneHoleMovements);\n    verticesMovements = verticesMovements.concat(oneHoleMovements);\n\n  }\n\n\n  // Loop bevelSegments, 1 for the front, 1 for the back\n\n  for (b = 0; b < bevelSegments; b++) {\n    //for ( b = bevelSegments; b > 0; b -- ) {\n\n    t = b / bevelSegments;\n    z = bevelThickness * (1 - t);\n\n    //z = bevelThickness * t;\n    bs = bevelSize * Math.sin(t * Math.PI / 2); // curved\n    //bs = bevelSize * t ; // linear\n\n    // contract shape\n\n    for (i = 0, il = contour.length; i < il; i++) {\n\n      vert = scalePt2(contour[i], contourMovements[i], bs);\n\n      v(vert.x, vert.y, -z);\n\n    }\n\n    // expand holes\n\n    for (h = 0, hl = holes.length; h < hl; h++) {\n\n      ahole = holes[h];\n      oneHoleMovements = holesMovements[h];\n\n      for (i = 0, il = ahole.length; i < il; i++) {\n\n        vert = scalePt2(ahole[i], oneHoleMovements[i], bs);\n\n        v(vert.x, vert.y, -z);\n\n      }\n\n    }\n\n  }\n\n  bs = bevelSize;\n\n  // Back facing vertices\n\n  for (i = 0; i < vlen; i++) {\n\n    vert = bevelEnabled ? scalePt2(vertices[i], verticesMovements[i], bs) : vertices[i];\n\n    if (!extrudeByPath) {\n\n      v(vert.x, vert.y, 0);\n\n    } else {\n\n      // v( vert.x, vert.y + extrudePts[ 0 ].y, extrudePts[ 0 ].x );\n\n      normal.copy(splineTube.normals[0]).multiplyScalar(vert.x);\n      binormal.copy(splineTube.binormals[0]).multiplyScalar(vert.y);\n\n      position2.copy(extrudePts[0]).add(normal).add(binormal);\n\n      v(position2.x, position2.y, position2.z);\n\n    }\n\n  }\n\n  // Add stepped vertices...\n  // Including front facing vertices\n\n  var s;\n\n  for (s = 1; s <= steps; s++) {\n\n    for (i = 0; i < vlen; i++) {\n\n      vert = bevelEnabled ? scalePt2(vertices[i], verticesMovements[i], bs) : vertices[i];\n\n      if (!extrudeByPath) {\n\n        v(vert.x, vert.y, amount / steps * s);\n\n      } else {\n\n        // v( vert.x, vert.y + extrudePts[ s - 1 ].y, extrudePts[ s - 1 ].x );\n\n        normal.copy(splineTube.normals[s]).multiplyScalar(vert.x);\n        binormal.copy(splineTube.binormals[s]).multiplyScalar(vert.y);\n\n        position2.copy(extrudePts[s]).add(normal).add(binormal);\n\n        v(position2.x, position2.y, position2.z);\n\n      }\n\n    }\n\n  }\n\n\n  // Add bevel segments planes\n\n  //for ( b = 1; b <= bevelSegments; b ++ ) {\n  for (b = bevelSegments - 1; b >= 0; b--) {\n\n    t = b / bevelSegments;\n    z = bevelThickness * (1 - t);\n    //bs = bevelSize * ( 1-Math.sin ( ( 1 - t ) * Math.PI/2 ) );\n    bs = bevelSize * Math.sin(t * Math.PI / 2);\n\n    // contract shape\n\n    for (i = 0, il = contour.length; i < il; i++) {\n\n      vert = scalePt2(contour[i], contourMovements[i], bs);\n      v(vert.x, vert.y, amount + z);\n\n    }\n\n    // expand holes\n\n    for (h = 0, hl = holes.length; h < hl; h++) {\n\n      ahole = holes[h];\n      oneHoleMovements = holesMovements[h];\n\n      for (i = 0, il = ahole.length; i < il; i++) {\n\n        vert = scalePt2(ahole[i], oneHoleMovements[i], bs);\n\n        if (!extrudeByPath) {\n\n          v(vert.x, vert.y, amount + z);\n\n        } else {\n\n          v(vert.x, vert.y + extrudePts[steps - 1].y, extrudePts[steps - 1].x + z);\n\n        }\n\n      }\n\n    }\n\n  }\n\n  /* Faces */\n\n  // Top and bottom faces\n\n  buildLidFaces();\n\n  // Sides faces\n\n  buildSideFaces();\n\n\n  /////  Internal functions\n\n  function buildLidFaces() {\n\n    if (bevelEnabled) {\n\n      var layer = 0; // steps + 1\n      var offset = vlen * layer;\n\n      // Bottom faces\n\n      for (i = 0; i < flen; i++) {\n\n        face = faces[i];\n        f3(face[2] + offset, face[1] + offset, face[0] + offset);\n\n      }\n\n      layer = steps + bevelSegments * 2;\n      offset = vlen * layer;\n\n      // Top faces\n\n      for (i = 0; i < flen; i++) {\n\n        face = faces[i];\n        f3(face[0] + offset, face[1] + offset, face[2] + offset);\n\n      }\n\n    } else {\n\n      // Bottom faces\n\n      for (i = 0; i < flen; i++) {\n\n        face = faces[i];\n        f3(face[2], face[1], face[0]);\n\n      }\n\n      // Top faces\n\n      for (i = 0; i < flen; i++) {\n\n        face = faces[i];\n        f3(face[0] + vlen * steps, face[1] + vlen * steps, face[2] + vlen * steps);\n\n      }\n    }\n\n  }\n\n  // Create faces for the z-sides of the shape\n\n  function buildSideFaces() {\n\n    var layeroffset = 0;\n    sidewalls(contour, layeroffset);\n    layeroffset += contour.length;\n\n    for (h = 0, hl = holes.length; h < hl; h++) {\n\n      ahole = holes[h];\n      sidewalls(ahole, layeroffset);\n\n      //, true\n      layeroffset += ahole.length;\n\n    }\n\n  }\n\n  function sidewalls(contour, layeroffset) {\n\n    var j, k;\n    i = contour.length;\n\n    while (--i >= 0) {\n\n      j = i;\n      k = i - 1;\n      if (k < 0) k = contour.length - 1;\n\n      //console.log('b', i,j, i-1, k,vertices.length);\n\n      var s = 0,sl = steps + bevelSegments * 2;\n\n      for (s = 0; s < sl; s++) {\n\n        var slen1 = vlen * s;\n        var slen2 = vlen * (s + 1);\n\n        var a = layeroffset + j + slen1,\n        b = layeroffset + k + slen1,\n        c = layeroffset + k + slen2,\n        d = layeroffset + j + slen2;\n\n        f4(a, b, c, d, contour, s, sl, j, k);\n\n      }\n    }\n\n  }\n\n\n  function v(x, y, z) {\n\n    scope.vertices.push(new THREE.Vector3(x, y, z));\n\n  }\n\n  function f3(a, b, c) {\n\n    a += shapesOffset;\n    b += shapesOffset;\n    c += shapesOffset;\n\n    // normal, color, material\n    scope.faces.push(new THREE.Face3(a, b, c, null, null, material));\n\n    var uvs = uvgen.generateTopUV(scope, a, b, c);\n\n    scope.faceVertexUvs[0].push(uvs);\n\n  }\n\n  function f4(a, b, c, d, wallContour, stepIndex, stepsLength, contourIndex1, contourIndex2) {\n\n    a += shapesOffset;\n    b += shapesOffset;\n    c += shapesOffset;\n    d += shapesOffset;\n\n    scope.faces.push(new THREE.Face3(a, b, d, null, null, extrudeMaterial));\n    scope.faces.push(new THREE.Face3(b, c, d, null, null, extrudeMaterial));\n\n    var uvs = uvgen.generateSideWallUV(scope, a, b, c, d);\n\n    scope.faceVertexUvs[0].push([uvs[0], uvs[1], uvs[3]]);\n    scope.faceVertexUvs[0].push([uvs[1], uvs[2], uvs[3]]);\n\n  }\n\n};\n\nTHREE.ExtrudeGeometry.WorldUVGenerator = {\n\n  generateTopUV: function generateTopUV(geometry, indexA, indexB, indexC) {\n\n    var vertices = geometry.vertices;\n\n    var a = vertices[indexA];\n    var b = vertices[indexB];\n    var c = vertices[indexC];\n\n    return [\n    new THREE.Vector2(a.x, a.y),\n    new THREE.Vector2(b.x, b.y),\n    new THREE.Vector2(c.x, c.y)];\n\n\n  },\n\n  generateSideWallUV: function generateSideWallUV(geometry, indexA, indexB, indexC, indexD) {\n\n    var vertices = geometry.vertices;\n\n    var a = vertices[indexA];\n    var b = vertices[indexB];\n    var c = vertices[indexC];\n    var d = vertices[indexD];\n\n    if (Math.abs(a.y - b.y) < 0.01) {\n      return [\n      new THREE.Vector2(a.x, 1 - a.z),\n      new THREE.Vector2(b.x, 1 - b.z),\n      new THREE.Vector2(c.x, 1 - c.z),\n      new THREE.Vector2(d.x, 1 - d.z)];\n\n    } else {\n      return [\n      new THREE.Vector2(a.y, 1 - a.z),\n      new THREE.Vector2(b.y, 1 - b.z),\n      new THREE.Vector2(c.y, 1 - c.z),\n      new THREE.Vector2(d.y, 1 - d.z)];\n\n    }\n  } };\n\n\n// File:src/extras/geometries/ShapeGeometry.js\n\n/**\n * @author jonobr1 / http://jonobr1.com\n *\n * Creates a one-sided polygonal geometry from a path shape. Similar to\n * ExtrudeGeometry.\n *\n * parameters = {\n *\n *\tcurveSegments: <int>, // number of points on the curves. NOT USED AT THE MOMENT.\n *\n *\tmaterial: <int> // material index for front and back faces\n *\tuvGenerator: <Object> // object that provides UV generator functions\n *\n * }\n **/\n\nTHREE.ShapeGeometry = function (shapes, options) {\n\n  THREE.Geometry.call(this);\n\n  this.type = 'ShapeGeometry';\n\n  if (shapes instanceof Array === false) shapes = [shapes];\n\n  this.addShapeList(shapes, options);\n\n  this.computeFaceNormals();\n\n};\n\nTHREE.ShapeGeometry.prototype = Object.create(THREE.Geometry.prototype);\nTHREE.ShapeGeometry.prototype.constructor = THREE.ShapeGeometry;\n\n/**\n                                                                  * Add an array of shapes to THREE.ShapeGeometry.\n                                                                  */\nTHREE.ShapeGeometry.prototype.addShapeList = function (shapes, options) {\n\n  for (var i = 0, l = shapes.length; i < l; i++) {\n\n    this.addShape(shapes[i], options);\n\n  }\n\n  return this;\n\n};\n\n/**\n    * Adds a shape to THREE.ShapeGeometry, based on THREE.ExtrudeGeometry.\n    */\nTHREE.ShapeGeometry.prototype.addShape = function (shape, options) {\n\n  if (options === undefined) options = {};\n  var curveSegments = options.curveSegments !== undefined ? options.curveSegments : 12;\n\n  var material = options.material;\n  var uvgen = options.UVGenerator === undefined ? THREE.ExtrudeGeometry.WorldUVGenerator : options.UVGenerator;\n\n  //\n\n  var i, l, hole;\n\n  var shapesOffset = this.vertices.length;\n  var shapePoints = shape.extractPoints(curveSegments);\n\n  var vertices = shapePoints.shape;\n  var holes = shapePoints.holes;\n\n  var reverse = !THREE.Shape.Utils.isClockWise(vertices);\n\n  if (reverse) {\n\n    vertices = vertices.reverse();\n\n    // Maybe we should also check if holes are in the opposite direction, just to be safe...\n\n    for (i = 0, l = holes.length; i < l; i++) {\n\n      hole = holes[i];\n\n      if (THREE.Shape.Utils.isClockWise(hole)) {\n\n        holes[i] = hole.reverse();\n\n      }\n\n    }\n\n    reverse = false;\n\n  }\n\n  var faces = THREE.Shape.Utils.triangulateShape(vertices, holes);\n\n  // Vertices\n\n  var contour = vertices;\n\n  for (i = 0, l = holes.length; i < l; i++) {\n\n    hole = holes[i];\n    vertices = vertices.concat(hole);\n\n  }\n\n  //\n\n  var vert,vlen = vertices.length;\n  var face,flen = faces.length;\n\n  for (i = 0; i < vlen; i++) {\n\n    vert = vertices[i];\n\n    this.vertices.push(new THREE.Vector3(vert.x, vert.y, 0));\n\n  }\n\n  for (i = 0; i < flen; i++) {\n\n    face = faces[i];\n\n    var a = face[0] + shapesOffset;\n    var b = face[1] + shapesOffset;\n    var c = face[2] + shapesOffset;\n\n    this.faces.push(new THREE.Face3(a, b, c, null, null, material));\n    this.faceVertexUvs[0].push(uvgen.generateTopUV(this, a, b, c));\n\n  }\n\n};\n\n// File:src/extras/geometries/LatheGeometry.js\n\n/**\n * @author astrodud / http://astrodud.isgreat.org/\n * @author zz85 / https://github.com/zz85\n * @author bhouston / http://exocortex.com\n */\n\n// points - to create a closed torus, one must use a set of points \n//    like so: [ a, b, c, d, a ], see first is the same as last.\n// segments - the number of circumference segments to create\n// phiStart - the starting radian\n// phiLength - the radian (0 to 2*PI) range of the lathed section\n//    2*pi is a closed lathe, less than 2PI is a portion.\n\nTHREE.LatheGeometry = function (points, segments, phiStart, phiLength) {\n\n  THREE.Geometry.call(this);\n\n  this.type = 'LatheGeometry';\n\n  this.parameters = {\n    points: points,\n    segments: segments,\n    phiStart: phiStart,\n    phiLength: phiLength };\n\n\n  segments = segments || 12;\n  phiStart = phiStart || 0;\n  phiLength = phiLength || 2 * Math.PI;\n\n  var inversePointLength = 1.0 / (points.length - 1);\n  var inverseSegments = 1.0 / segments;\n\n  for (var i = 0, il = segments; i <= il; i++) {\n\n    var phi = phiStart + i * inverseSegments * phiLength;\n\n    var c = Math.cos(phi),\n    s = Math.sin(phi);\n\n    for (var j = 0, jl = points.length; j < jl; j++) {\n\n      var pt = points[j];\n\n      var vertex = new THREE.Vector3();\n\n      vertex.x = c * pt.x - s * pt.y;\n      vertex.y = s * pt.x + c * pt.y;\n      vertex.z = pt.z;\n\n      this.vertices.push(vertex);\n\n    }\n\n  }\n\n  var np = points.length;\n\n  for (var i = 0, il = segments; i < il; i++) {\n\n    for (var j = 0, jl = points.length - 1; j < jl; j++) {\n\n      var base = j + np * i;\n      var a = base;\n      var b = base + np;\n      var c = base + 1 + np;\n      var d = base + 1;\n\n      var u0 = i * inverseSegments;\n      var v0 = j * inversePointLength;\n      var u1 = u0 + inverseSegments;\n      var v1 = v0 + inversePointLength;\n\n      this.faces.push(new THREE.Face3(a, b, d));\n\n      this.faceVertexUvs[0].push([\n\n      new THREE.Vector2(u0, v0),\n      new THREE.Vector2(u1, v0),\n      new THREE.Vector2(u0, v1)]);\n\n\n\n      this.faces.push(new THREE.Face3(b, c, d));\n\n      this.faceVertexUvs[0].push([\n\n      new THREE.Vector2(u1, v0),\n      new THREE.Vector2(u1, v1),\n      new THREE.Vector2(u0, v1)]);\n\n\n\n\n    }\n\n  }\n\n  this.mergeVertices();\n  this.computeFaceNormals();\n  this.computeVertexNormals();\n\n};\n\nTHREE.LatheGeometry.prototype = Object.create(THREE.Geometry.prototype);\nTHREE.LatheGeometry.prototype.constructor = THREE.LatheGeometry;\n\n// File:src/extras/geometries/PlaneGeometry.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * based on http://papervision3d.googlecode.com/svn/trunk/as3/trunk/src/org/papervision3d/objects/primitives/Plane.as\n */\n\nTHREE.PlaneGeometry = function (width, height, widthSegments, heightSegments) {\n\n  console.info('THREE.PlaneGeometry: Consider using THREE.PlaneBufferGeometry for lower memory footprint.');\n\n  THREE.Geometry.call(this);\n\n  this.type = 'PlaneGeometry';\n\n  this.parameters = {\n    width: width,\n    height: height,\n    widthSegments: widthSegments,\n    heightSegments: heightSegments };\n\n\n  this.fromBufferGeometry(new THREE.PlaneBufferGeometry(width, height, widthSegments, heightSegments));\n\n};\n\nTHREE.PlaneGeometry.prototype = Object.create(THREE.Geometry.prototype);\nTHREE.PlaneGeometry.prototype.constructor = THREE.PlaneGeometry;\n\n// File:src/extras/geometries/PlaneBufferGeometry.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * based on http://papervision3d.googlecode.com/svn/trunk/as3/trunk/src/org/papervision3d/objects/primitives/Plane.as\n */\n\nTHREE.PlaneBufferGeometry = function (width, height, widthSegments, heightSegments) {\n\n  THREE.BufferGeometry.call(this);\n\n  this.type = 'PlaneBufferGeometry';\n\n  this.parameters = {\n    width: width,\n    height: height,\n    widthSegments: widthSegments,\n    heightSegments: heightSegments };\n\n\n  var width_half = width / 2;\n  var height_half = height / 2;\n\n  var gridX = widthSegments || 1;\n  var gridY = heightSegments || 1;\n\n  var gridX1 = gridX + 1;\n  var gridY1 = gridY + 1;\n\n  var segment_width = width / gridX;\n  var segment_height = height / gridY;\n\n  var vertices = new Float32Array(gridX1 * gridY1 * 3);\n  var normals = new Float32Array(gridX1 * gridY1 * 3);\n  var uvs = new Float32Array(gridX1 * gridY1 * 2);\n\n  var offset = 0;\n  var offset2 = 0;\n\n  for (var iy = 0; iy < gridY1; iy++) {\n\n    var y = iy * segment_height - height_half;\n\n    for (var ix = 0; ix < gridX1; ix++) {\n\n      var x = ix * segment_width - width_half;\n\n      vertices[offset] = x;\n      vertices[offset + 1] = -y;\n\n      normals[offset + 2] = 1;\n\n      uvs[offset2] = ix / gridX;\n      uvs[offset2 + 1] = 1 - iy / gridY;\n\n      offset += 3;\n      offset2 += 2;\n\n    }\n\n  }\n\n  offset = 0;\n\n  var indices = new (vertices.length / 3 > 65535 ? Uint32Array : Uint16Array)(gridX * gridY * 6);\n\n  for (var iy = 0; iy < gridY; iy++) {\n\n    for (var ix = 0; ix < gridX; ix++) {\n\n      var a = ix + gridX1 * iy;\n      var b = ix + gridX1 * (iy + 1);\n      var c = ix + 1 + gridX1 * (iy + 1);\n      var d = ix + 1 + gridX1 * iy;\n\n      indices[offset] = a;\n      indices[offset + 1] = b;\n      indices[offset + 2] = d;\n\n      indices[offset + 3] = b;\n      indices[offset + 4] = c;\n      indices[offset + 5] = d;\n\n      offset += 6;\n\n    }\n\n  }\n\n  this.addAttribute('index', new THREE.BufferAttribute(indices, 1));\n  this.addAttribute('position', new THREE.BufferAttribute(vertices, 3));\n  this.addAttribute('normal', new THREE.BufferAttribute(normals, 3));\n  this.addAttribute('uv', new THREE.BufferAttribute(uvs, 2));\n\n};\n\nTHREE.PlaneBufferGeometry.prototype = Object.create(THREE.BufferGeometry.prototype);\nTHREE.PlaneBufferGeometry.prototype.constructor = THREE.PlaneBufferGeometry;\n\n// File:src/extras/geometries/RingGeometry.js\n\n/**\n * @author Kaleb Murphy\n */\n\nTHREE.RingGeometry = function (innerRadius, outerRadius, thetaSegments, phiSegments, thetaStart, thetaLength) {\n\n  THREE.Geometry.call(this);\n\n  this.type = 'RingGeometry';\n\n  this.parameters = {\n    innerRadius: innerRadius,\n    outerRadius: outerRadius,\n    thetaSegments: thetaSegments,\n    phiSegments: phiSegments,\n    thetaStart: thetaStart,\n    thetaLength: thetaLength };\n\n\n  innerRadius = innerRadius || 0;\n  outerRadius = outerRadius || 50;\n\n  thetaStart = thetaStart !== undefined ? thetaStart : 0;\n  thetaLength = thetaLength !== undefined ? thetaLength : Math.PI * 2;\n\n  thetaSegments = thetaSegments !== undefined ? Math.max(3, thetaSegments) : 8;\n  phiSegments = phiSegments !== undefined ? Math.max(1, phiSegments) : 8;\n\n  var i,o,uvs = [],radius = innerRadius,radiusStep = (outerRadius - innerRadius) / phiSegments;\n\n  for (i = 0; i < phiSegments + 1; i++) {// concentric circles inside ring\n\n    for (o = 0; o < thetaSegments + 1; o++) {// number of segments per circle\n\n      var vertex = new THREE.Vector3();\n      var segment = thetaStart + o / thetaSegments * thetaLength;\n      vertex.x = radius * Math.cos(segment);\n      vertex.y = radius * Math.sin(segment);\n\n      this.vertices.push(vertex);\n      uvs.push(new THREE.Vector2((vertex.x / outerRadius + 1) / 2, (vertex.y / outerRadius + 1) / 2));\n    }\n\n    radius += radiusStep;\n\n  }\n\n  var n = new THREE.Vector3(0, 0, 1);\n\n  for (i = 0; i < phiSegments; i++) {// concentric circles inside ring\n\n    var thetaSegment = i * (thetaSegments + 1);\n\n    for (o = 0; o < thetaSegments; o++) {// number of segments per circle\n\n      var segment = o + thetaSegment;\n\n      var v1 = segment;\n      var v2 = segment + thetaSegments + 1;\n      var v3 = segment + thetaSegments + 2;\n\n      this.faces.push(new THREE.Face3(v1, v2, v3, [n.clone(), n.clone(), n.clone()]));\n      this.faceVertexUvs[0].push([uvs[v1].clone(), uvs[v2].clone(), uvs[v3].clone()]);\n\n      v1 = segment;\n      v2 = segment + thetaSegments + 2;\n      v3 = segment + 1;\n\n      this.faces.push(new THREE.Face3(v1, v2, v3, [n.clone(), n.clone(), n.clone()]));\n      this.faceVertexUvs[0].push([uvs[v1].clone(), uvs[v2].clone(), uvs[v3].clone()]);\n\n    }\n  }\n\n  this.computeFaceNormals();\n\n  this.boundingSphere = new THREE.Sphere(new THREE.Vector3(), radius);\n\n};\n\nTHREE.RingGeometry.prototype = Object.create(THREE.Geometry.prototype);\nTHREE.RingGeometry.prototype.constructor = THREE.RingGeometry;\n\n\n// File:src/extras/geometries/SphereGeometry.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.SphereGeometry = function (radius, widthSegments, heightSegments, phiStart, phiLength, thetaStart, thetaLength) {\n\n  THREE.Geometry.call(this);\n\n  this.type = 'SphereGeometry';\n\n  this.parameters = {\n    radius: radius,\n    widthSegments: widthSegments,\n    heightSegments: heightSegments,\n    phiStart: phiStart,\n    phiLength: phiLength,\n    thetaStart: thetaStart,\n    thetaLength: thetaLength };\n\n\n  radius = radius || 50;\n\n  widthSegments = Math.max(3, Math.floor(widthSegments) || 8);\n  heightSegments = Math.max(2, Math.floor(heightSegments) || 6);\n\n  phiStart = phiStart !== undefined ? phiStart : 0;\n  phiLength = phiLength !== undefined ? phiLength : Math.PI * 2;\n\n  thetaStart = thetaStart !== undefined ? thetaStart : 0;\n  thetaLength = thetaLength !== undefined ? thetaLength : Math.PI;\n\n  var x,y,vertices = [],uvs = [];\n\n  for (y = 0; y <= heightSegments; y++) {\n\n    var verticesRow = [];\n    var uvsRow = [];\n\n    for (x = 0; x <= widthSegments; x++) {\n\n      var u = x / widthSegments;\n      var v = y / heightSegments;\n\n      var vertex = new THREE.Vector3();\n      vertex.x = -radius * Math.cos(phiStart + u * phiLength) * Math.sin(thetaStart + v * thetaLength);\n      vertex.y = radius * Math.cos(thetaStart + v * thetaLength);\n      vertex.z = radius * Math.sin(phiStart + u * phiLength) * Math.sin(thetaStart + v * thetaLength);\n\n      this.vertices.push(vertex);\n\n      verticesRow.push(this.vertices.length - 1);\n      uvsRow.push(new THREE.Vector2(u, 1 - v));\n\n    }\n\n    vertices.push(verticesRow);\n    uvs.push(uvsRow);\n\n  }\n\n  for (y = 0; y < heightSegments; y++) {\n\n    for (x = 0; x < widthSegments; x++) {\n\n      var v1 = vertices[y][x + 1];\n      var v2 = vertices[y][x];\n      var v3 = vertices[y + 1][x];\n      var v4 = vertices[y + 1][x + 1];\n\n      var n1 = this.vertices[v1].clone().normalize();\n      var n2 = this.vertices[v2].clone().normalize();\n      var n3 = this.vertices[v3].clone().normalize();\n      var n4 = this.vertices[v4].clone().normalize();\n\n      var uv1 = uvs[y][x + 1].clone();\n      var uv2 = uvs[y][x].clone();\n      var uv3 = uvs[y + 1][x].clone();\n      var uv4 = uvs[y + 1][x + 1].clone();\n\n      if (Math.abs(this.vertices[v1].y) === radius) {\n\n        uv1.x = (uv1.x + uv2.x) / 2;\n        this.faces.push(new THREE.Face3(v1, v3, v4, [n1, n3, n4]));\n        this.faceVertexUvs[0].push([uv1, uv3, uv4]);\n\n      } else if (Math.abs(this.vertices[v3].y) === radius) {\n\n        uv3.x = (uv3.x + uv4.x) / 2;\n        this.faces.push(new THREE.Face3(v1, v2, v3, [n1, n2, n3]));\n        this.faceVertexUvs[0].push([uv1, uv2, uv3]);\n\n      } else {\n\n        this.faces.push(new THREE.Face3(v1, v2, v4, [n1, n2, n4]));\n        this.faceVertexUvs[0].push([uv1, uv2, uv4]);\n\n        this.faces.push(new THREE.Face3(v2, v3, v4, [n2.clone(), n3, n4.clone()]));\n        this.faceVertexUvs[0].push([uv2.clone(), uv3, uv4.clone()]);\n\n      }\n\n    }\n\n  }\n\n  this.computeFaceNormals();\n\n  this.boundingSphere = new THREE.Sphere(new THREE.Vector3(), radius);\n\n};\n\nTHREE.SphereGeometry.prototype = Object.create(THREE.Geometry.prototype);\nTHREE.SphereGeometry.prototype.constructor = THREE.SphereGeometry;\n\n// File:src/extras/geometries/TextGeometry.js\n\n/**\n * @author zz85 / http://www.lab4games.net/zz85/blog\n * @author alteredq / http://alteredqualia.com/\n *\n * For creating 3D text geometry in three.js\n *\n * Text = 3D Text\n *\n * parameters = {\n *  size: \t\t\t<float>, \t// size of the text\n *  height: \t\t<float>, \t// thickness to extrude text\n *  curveSegments: \t<int>,\t\t// number of points on the curves\n *\n *  font: \t\t\t<string>,\t\t// font name\n *  weight: \t\t<string>,\t\t// font weight (normal, bold)\n *  style: \t\t\t<string>,\t\t// font style  (normal, italics)\n *\n *  bevelEnabled:\t<bool>,\t\t\t// turn on bevel\n *  bevelThickness: <float>, \t\t// how deep into text bevel goes\n *  bevelSize:\t\t<float>, \t\t// how far from text outline is bevel\n *  }\n *\n */\n\n/*\tUsage Examples\n    \n    \t// TextGeometry wrapper\n    \n    \tvar text3d = new TextGeometry( text, options );\n    \n    \t// Complete manner\n    \n    \tvar textShapes = THREE.FontUtils.generateShapes( text, options );\n    \tvar text3d = new ExtrudeGeometry( textShapes, options );\n    \n    */\n\n\nTHREE.TextGeometry = function (text, parameters) {\n\n  parameters = parameters || {};\n\n  var textShapes = THREE.FontUtils.generateShapes(text, parameters);\n\n  // translate parameters to ExtrudeGeometry API\n\n  parameters.amount = parameters.height !== undefined ? parameters.height : 50;\n\n  // defaults\n\n  if (parameters.bevelThickness === undefined) parameters.bevelThickness = 10;\n  if (parameters.bevelSize === undefined) parameters.bevelSize = 8;\n  if (parameters.bevelEnabled === undefined) parameters.bevelEnabled = false;\n\n  THREE.ExtrudeGeometry.call(this, textShapes, parameters);\n\n  this.type = 'TextGeometry';\n\n};\n\nTHREE.TextGeometry.prototype = Object.create(THREE.ExtrudeGeometry.prototype);\nTHREE.TextGeometry.prototype.constructor = THREE.TextGeometry;\n\n// File:src/extras/geometries/TorusGeometry.js\n\n/**\n * @author oosmoxiecode\n * @author mrdoob / http://mrdoob.com/\n * based on http://code.google.com/p/away3d/source/browse/trunk/fp10/Away3DLite/src/away3dlite/primitives/Torus.as?r=2888\n */\n\nTHREE.TorusGeometry = function (radius, tube, radialSegments, tubularSegments, arc) {\n\n  THREE.Geometry.call(this);\n\n  this.type = 'TorusGeometry';\n\n  this.parameters = {\n    radius: radius,\n    tube: tube,\n    radialSegments: radialSegments,\n    tubularSegments: tubularSegments,\n    arc: arc };\n\n\n  radius = radius || 100;\n  tube = tube || 40;\n  radialSegments = radialSegments || 8;\n  tubularSegments = tubularSegments || 6;\n  arc = arc || Math.PI * 2;\n\n  var center = new THREE.Vector3(),uvs = [],normals = [];\n\n  for (var j = 0; j <= radialSegments; j++) {\n\n    for (var i = 0; i <= tubularSegments; i++) {\n\n      var u = i / tubularSegments * arc;\n      var v = j / radialSegments * Math.PI * 2;\n\n      center.x = radius * Math.cos(u);\n      center.y = radius * Math.sin(u);\n\n      var vertex = new THREE.Vector3();\n      vertex.x = (radius + tube * Math.cos(v)) * Math.cos(u);\n      vertex.y = (radius + tube * Math.cos(v)) * Math.sin(u);\n      vertex.z = tube * Math.sin(v);\n\n      this.vertices.push(vertex);\n\n      uvs.push(new THREE.Vector2(i / tubularSegments, j / radialSegments));\n      normals.push(vertex.clone().sub(center).normalize());\n\n    }\n\n  }\n\n  for (var j = 1; j <= radialSegments; j++) {\n\n    for (var i = 1; i <= tubularSegments; i++) {\n\n      var a = (tubularSegments + 1) * j + i - 1;\n      var b = (tubularSegments + 1) * (j - 1) + i - 1;\n      var c = (tubularSegments + 1) * (j - 1) + i;\n      var d = (tubularSegments + 1) * j + i;\n\n      var face = new THREE.Face3(a, b, d, [normals[a].clone(), normals[b].clone(), normals[d].clone()]);\n      this.faces.push(face);\n      this.faceVertexUvs[0].push([uvs[a].clone(), uvs[b].clone(), uvs[d].clone()]);\n\n      face = new THREE.Face3(b, c, d, [normals[b].clone(), normals[c].clone(), normals[d].clone()]);\n      this.faces.push(face);\n      this.faceVertexUvs[0].push([uvs[b].clone(), uvs[c].clone(), uvs[d].clone()]);\n\n    }\n\n  }\n\n  this.computeFaceNormals();\n\n};\n\nTHREE.TorusGeometry.prototype = Object.create(THREE.Geometry.prototype);\nTHREE.TorusGeometry.prototype.constructor = THREE.TorusGeometry;\n\n// File:src/extras/geometries/TorusKnotGeometry.js\n\n/**\n * @author oosmoxiecode\n * based on http://code.google.com/p/away3d/source/browse/trunk/fp10/Away3D/src/away3d/primitives/TorusKnot.as?spec=svn2473&r=2473\n */\n\nTHREE.TorusKnotGeometry = function (radius, tube, radialSegments, tubularSegments, p, q, heightScale) {\n\n  THREE.Geometry.call(this);\n\n  this.type = 'TorusKnotGeometry';\n\n  this.parameters = {\n    radius: radius,\n    tube: tube,\n    radialSegments: radialSegments,\n    tubularSegments: tubularSegments,\n    p: p,\n    q: q,\n    heightScale: heightScale };\n\n\n  radius = radius || 100;\n  tube = tube || 40;\n  radialSegments = radialSegments || 64;\n  tubularSegments = tubularSegments || 8;\n  p = p || 2;\n  q = q || 3;\n  heightScale = heightScale || 1;\n\n  var grid = new Array(radialSegments);\n  var tang = new THREE.Vector3();\n  var n = new THREE.Vector3();\n  var bitan = new THREE.Vector3();\n\n  for (var i = 0; i < radialSegments; ++i) {\n\n    grid[i] = new Array(tubularSegments);\n    var u = i / radialSegments * 2 * p * Math.PI;\n    var p1 = getPos(u, q, p, radius, heightScale);\n    var p2 = getPos(u + 0.01, q, p, radius, heightScale);\n    tang.subVectors(p2, p1);\n    n.addVectors(p2, p1);\n\n    bitan.crossVectors(tang, n);\n    n.crossVectors(bitan, tang);\n    bitan.normalize();\n    n.normalize();\n\n    for (var j = 0; j < tubularSegments; ++j) {\n\n      var v = j / tubularSegments * 2 * Math.PI;\n      var cx = -tube * Math.cos(v); // TODO: Hack: Negating it so it faces outside.\n      var cy = tube * Math.sin(v);\n\n      var pos = new THREE.Vector3();\n      pos.x = p1.x + cx * n.x + cy * bitan.x;\n      pos.y = p1.y + cx * n.y + cy * bitan.y;\n      pos.z = p1.z + cx * n.z + cy * bitan.z;\n\n      grid[i][j] = this.vertices.push(pos) - 1;\n\n    }\n\n  }\n\n  for (var i = 0; i < radialSegments; ++i) {\n\n    for (var j = 0; j < tubularSegments; ++j) {\n\n      var ip = (i + 1) % radialSegments;\n      var jp = (j + 1) % tubularSegments;\n\n      var a = grid[i][j];\n      var b = grid[ip][j];\n      var c = grid[ip][jp];\n      var d = grid[i][jp];\n\n      var uva = new THREE.Vector2(i / radialSegments, j / tubularSegments);\n      var uvb = new THREE.Vector2((i + 1) / radialSegments, j / tubularSegments);\n      var uvc = new THREE.Vector2((i + 1) / radialSegments, (j + 1) / tubularSegments);\n      var uvd = new THREE.Vector2(i / radialSegments, (j + 1) / tubularSegments);\n\n      this.faces.push(new THREE.Face3(a, b, d));\n      this.faceVertexUvs[0].push([uva, uvb, uvd]);\n\n      this.faces.push(new THREE.Face3(b, c, d));\n      this.faceVertexUvs[0].push([uvb.clone(), uvc, uvd.clone()]);\n\n    }\n  }\n\n  this.computeFaceNormals();\n  this.computeVertexNormals();\n\n  function getPos(u, in_q, in_p, radius, heightScale) {\n\n    var cu = Math.cos(u);\n    var su = Math.sin(u);\n    var quOverP = in_q / in_p * u;\n    var cs = Math.cos(quOverP);\n\n    var tx = radius * (2 + cs) * 0.5 * cu;\n    var ty = radius * (2 + cs) * su * 0.5;\n    var tz = heightScale * radius * Math.sin(quOverP) * 0.5;\n\n    return new THREE.Vector3(tx, ty, tz);\n\n  }\n\n};\n\nTHREE.TorusKnotGeometry.prototype = Object.create(THREE.Geometry.prototype);\nTHREE.TorusKnotGeometry.prototype.constructor = THREE.TorusKnotGeometry;\n\n// File:src/extras/geometries/TubeGeometry.js\n\n/**\n * @author WestLangley / https://github.com/WestLangley\n * @author zz85 / https://github.com/zz85\n * @author miningold / https://github.com/miningold\n * @author jonobr1 / https://github.com/jonobr1\n *\n * Modified from the TorusKnotGeometry by @oosmoxiecode\n *\n * Creates a tube which extrudes along a 3d spline\n *\n * Uses parallel transport frames as described in\n * http://www.cs.indiana.edu/pub/techreports/TR425.pdf\n */\n\nTHREE.TubeGeometry = function (path, segments, radius, radialSegments, closed, taper) {\n\n  THREE.Geometry.call(this);\n\n  this.type = 'TubeGeometry';\n\n  this.parameters = {\n    path: path,\n    segments: segments,\n    radius: radius,\n    radialSegments: radialSegments,\n    closed: closed };\n\n\n  segments = segments || 64;\n  radius = radius || 1;\n  radialSegments = radialSegments || 8;\n  closed = closed || false;\n  taper = taper || THREE.TubeGeometry.NoTaper;\n\n  var grid = [];\n\n  var scope = this,\n\n  tangent,\n  normal,\n  binormal,\n\n  numpoints = segments + 1,\n\n  u,v,r,\n\n  cx,cy,\n  pos,pos2 = new THREE.Vector3(),\n  i,j,\n  ip,jp,\n  a,b,c,d,\n  uva,uvb,uvc,uvd;\n\n  var frames = new THREE.TubeGeometry.FrenetFrames(path, segments, closed),\n  tangents = frames.tangents,\n  normals = frames.normals,\n  binormals = frames.binormals;\n\n  // proxy internals\n  this.tangents = tangents;\n  this.normals = normals;\n  this.binormals = binormals;\n\n  function vert(x, y, z) {\n\n    return scope.vertices.push(new THREE.Vector3(x, y, z)) - 1;\n\n  }\n\n  // consruct the grid\n\n  for (i = 0; i < numpoints; i++) {\n\n    grid[i] = [];\n\n    u = i / (numpoints - 1);\n\n    pos = path.getPointAt(u);\n\n    tangent = tangents[i];\n    normal = normals[i];\n    binormal = binormals[i];\n\n    r = radius * taper(u);\n\n    for (j = 0; j < radialSegments; j++) {\n\n      v = j / radialSegments * 2 * Math.PI;\n\n      cx = -r * Math.cos(v); // TODO: Hack: Negating it so it faces outside.\n      cy = r * Math.sin(v);\n\n      pos2.copy(pos);\n      pos2.x += cx * normal.x + cy * binormal.x;\n      pos2.y += cx * normal.y + cy * binormal.y;\n      pos2.z += cx * normal.z + cy * binormal.z;\n\n      grid[i][j] = vert(pos2.x, pos2.y, pos2.z);\n\n    }\n  }\n\n\n  // construct the mesh\n\n  for (i = 0; i < segments; i++) {\n\n    for (j = 0; j < radialSegments; j++) {\n\n      ip = closed ? (i + 1) % segments : i + 1;\n      jp = (j + 1) % radialSegments;\n\n      a = grid[i][j]; // *** NOT NECESSARILY PLANAR ! ***\n      b = grid[ip][j];\n      c = grid[ip][jp];\n      d = grid[i][jp];\n\n      uva = new THREE.Vector2(i / segments, j / radialSegments);\n      uvb = new THREE.Vector2((i + 1) / segments, j / radialSegments);\n      uvc = new THREE.Vector2((i + 1) / segments, (j + 1) / radialSegments);\n      uvd = new THREE.Vector2(i / segments, (j + 1) / radialSegments);\n\n      this.faces.push(new THREE.Face3(a, b, d));\n      this.faceVertexUvs[0].push([uva, uvb, uvd]);\n\n      this.faces.push(new THREE.Face3(b, c, d));\n      this.faceVertexUvs[0].push([uvb.clone(), uvc, uvd.clone()]);\n\n    }\n  }\n\n  this.computeFaceNormals();\n  this.computeVertexNormals();\n\n};\n\nTHREE.TubeGeometry.prototype = Object.create(THREE.Geometry.prototype);\nTHREE.TubeGeometry.prototype.constructor = THREE.TubeGeometry;\n\nTHREE.TubeGeometry.NoTaper = function (u) {\n\n  return 1;\n\n};\n\nTHREE.TubeGeometry.SinusoidalTaper = function (u) {\n\n  return Math.sin(Math.PI * u);\n\n};\n\n// For computing of Frenet frames, exposing the tangents, normals and binormals the spline\nTHREE.TubeGeometry.FrenetFrames = function (path, segments, closed) {\n\n  var normal = new THREE.Vector3(),\n\n  tangents = [],\n  normals = [],\n  binormals = [],\n\n  vec = new THREE.Vector3(),\n  mat = new THREE.Matrix4(),\n\n  numpoints = segments + 1,\n  theta,\n  epsilon = 0.0001,\n  smallest,\n\n  tx,ty,tz,\n  i,u;\n\n\n  // expose internals\n  this.tangents = tangents;\n  this.normals = normals;\n  this.binormals = binormals;\n\n  // compute the tangent vectors for each segment on the path\n\n  for (i = 0; i < numpoints; i++) {\n\n    u = i / (numpoints - 1);\n\n    tangents[i] = path.getTangentAt(u);\n    tangents[i].normalize();\n\n  }\n\n  initialNormal3();\n\n  /*\n                    function initialNormal1(lastBinormal) {\n                    \t// fixed start binormal. Has dangers of 0 vectors\n                    \tnormals[ 0 ] = new THREE.Vector3();\n                    \tbinormals[ 0 ] = new THREE.Vector3();\n                    \tif (lastBinormal===undefined) lastBinormal = new THREE.Vector3( 0, 0, 1 );\n                    \tnormals[ 0 ].crossVectors( lastBinormal, tangents[ 0 ] ).normalize();\n                    \tbinormals[ 0 ].crossVectors( tangents[ 0 ], normals[ 0 ] ).normalize();\n                    }\n                    \tfunction initialNormal2() {\n                    \t\t// This uses the Frenet-Serret formula for deriving binormal\n                    \tvar t2 = path.getTangentAt( epsilon );\n                    \t\tnormals[ 0 ] = new THREE.Vector3().subVectors( t2, tangents[ 0 ] ).normalize();\n                    \tbinormals[ 0 ] = new THREE.Vector3().crossVectors( tangents[ 0 ], normals[ 0 ] );\n                    \t\tnormals[ 0 ].crossVectors( binormals[ 0 ], tangents[ 0 ] ).normalize(); // last binormal x tangent\n                    \tbinormals[ 0 ].crossVectors( tangents[ 0 ], normals[ 0 ] ).normalize();\n                    \t}\n                    */\n\n\n\n\n\n\n  function initialNormal3() {\n    // select an initial normal vector perpenicular to the first tangent vector,\n    // and in the direction of the smallest tangent xyz component\n\n    normals[0] = new THREE.Vector3();\n    binormals[0] = new THREE.Vector3();\n    smallest = Number.MAX_VALUE;\n    tx = Math.abs(tangents[0].x);\n    ty = Math.abs(tangents[0].y);\n    tz = Math.abs(tangents[0].z);\n\n    if (tx <= smallest) {\n      smallest = tx;\n      normal.set(1, 0, 0);\n    }\n\n    if (ty <= smallest) {\n      smallest = ty;\n      normal.set(0, 1, 0);\n    }\n\n    if (tz <= smallest) {\n      normal.set(0, 0, 1);\n    }\n\n    vec.crossVectors(tangents[0], normal).normalize();\n\n    normals[0].crossVectors(tangents[0], vec);\n    binormals[0].crossVectors(tangents[0], normals[0]);\n  }\n\n\n  // compute the slowly-varying normal and binormal vectors for each segment on the path\n\n  for (i = 1; i < numpoints; i++) {\n\n    normals[i] = normals[i - 1].clone();\n\n    binormals[i] = binormals[i - 1].clone();\n\n    vec.crossVectors(tangents[i - 1], tangents[i]);\n\n    if (vec.length() > epsilon) {\n\n      vec.normalize();\n\n      theta = Math.acos(THREE.Math.clamp(tangents[i - 1].dot(tangents[i]), -1, 1)); // clamp for floating pt errors\n\n      normals[i].applyMatrix4(mat.makeRotationAxis(vec, theta));\n\n    }\n\n    binormals[i].crossVectors(tangents[i], normals[i]);\n\n  }\n\n\n  // if the curve is closed, postprocess the vectors so the first and last normal vectors are the same\n\n  if (closed) {\n\n    theta = Math.acos(THREE.Math.clamp(normals[0].dot(normals[numpoints - 1]), -1, 1));\n    theta /= numpoints - 1;\n\n    if (tangents[0].dot(vec.crossVectors(normals[0], normals[numpoints - 1])) > 0) {\n\n      theta = -theta;\n\n    }\n\n    for (i = 1; i < numpoints; i++) {\n\n      // twist a little...\n      normals[i].applyMatrix4(mat.makeRotationAxis(tangents[i], theta * i));\n      binormals[i].crossVectors(tangents[i], normals[i]);\n\n    }\n\n  }\n};\n\n// File:src/extras/geometries/PolyhedronGeometry.js\n\n/**\n * @author clockworkgeek / https://github.com/clockworkgeek\n * @author timothypratley / https://github.com/timothypratley\n * @author WestLangley / http://github.com/WestLangley\n*/\n\nTHREE.PolyhedronGeometry = function (vertices, indices, radius, detail) {\n\n  THREE.Geometry.call(this);\n\n  this.type = 'PolyhedronGeometry';\n\n  this.parameters = {\n    vertices: vertices,\n    indices: indices,\n    radius: radius,\n    detail: detail };\n\n\n  radius = radius || 1;\n  detail = detail || 0;\n\n  var that = this;\n\n  for (var i = 0, l = vertices.length; i < l; i += 3) {\n\n    prepare(new THREE.Vector3(vertices[i], vertices[i + 1], vertices[i + 2]));\n\n  }\n\n  var p = this.vertices;\n\n  var faces = [];\n\n  for (var i = 0, j = 0, l = indices.length; i < l; i += 3, j++) {\n\n    var v1 = p[indices[i]];\n    var v2 = p[indices[i + 1]];\n    var v3 = p[indices[i + 2]];\n\n    faces[j] = new THREE.Face3(v1.index, v2.index, v3.index, [v1.clone(), v2.clone(), v3.clone()]);\n\n  }\n\n  var centroid = new THREE.Vector3();\n\n  for (var i = 0, l = faces.length; i < l; i++) {\n\n    subdivide(faces[i], detail);\n\n  }\n\n\n  // Handle case when face straddles the seam\n\n  for (var i = 0, l = this.faceVertexUvs[0].length; i < l; i++) {\n\n    var uvs = this.faceVertexUvs[0][i];\n\n    var x0 = uvs[0].x;\n    var x1 = uvs[1].x;\n    var x2 = uvs[2].x;\n\n    var max = Math.max(x0, Math.max(x1, x2));\n    var min = Math.min(x0, Math.min(x1, x2));\n\n    if (max > 0.9 && min < 0.1) {// 0.9 is somewhat arbitrary\n\n      if (x0 < 0.2) uvs[0].x += 1;\n      if (x1 < 0.2) uvs[1].x += 1;\n      if (x2 < 0.2) uvs[2].x += 1;\n\n    }\n\n  }\n\n\n  // Apply radius\n\n  for (var i = 0, l = this.vertices.length; i < l; i++) {\n\n    this.vertices[i].multiplyScalar(radius);\n\n  }\n\n\n  // Merge vertices\n\n  this.mergeVertices();\n\n  this.computeFaceNormals();\n\n  this.boundingSphere = new THREE.Sphere(new THREE.Vector3(), radius);\n\n\n  // Project vector onto sphere's surface\n\n  function prepare(vector) {\n\n    var vertex = vector.normalize().clone();\n    vertex.index = that.vertices.push(vertex) - 1;\n\n    // Texture coords are equivalent to map coords, calculate angle and convert to fraction of a circle.\n\n    var u = azimuth(vector) / 2 / Math.PI + 0.5;\n    var v = inclination(vector) / Math.PI + 0.5;\n    vertex.uv = new THREE.Vector2(u, 1 - v);\n\n    return vertex;\n\n  }\n\n\n  // Approximate a curved face with recursively sub-divided triangles.\n\n  function make(v1, v2, v3) {\n\n    var face = new THREE.Face3(v1.index, v2.index, v3.index, [v1.clone(), v2.clone(), v3.clone()]);\n    that.faces.push(face);\n\n    centroid.copy(v1).add(v2).add(v3).divideScalar(3);\n\n    var azi = azimuth(centroid);\n\n    that.faceVertexUvs[0].push([\n    correctUV(v1.uv, v1, azi),\n    correctUV(v2.uv, v2, azi),\n    correctUV(v3.uv, v3, azi)]);\n\n\n  }\n\n\n  // Analytically subdivide a face to the required detail level.\n\n  function subdivide(face, detail) {\n\n    var cols = Math.pow(2, detail);\n    var a = prepare(that.vertices[face.a]);\n    var b = prepare(that.vertices[face.b]);\n    var c = prepare(that.vertices[face.c]);\n    var v = [];\n\n    // Construct all of the vertices for this subdivision.\n\n    for (var i = 0; i <= cols; i++) {\n\n      v[i] = [];\n\n      var aj = prepare(a.clone().lerp(c, i / cols));\n      var bj = prepare(b.clone().lerp(c, i / cols));\n      var rows = cols - i;\n\n      for (var j = 0; j <= rows; j++) {\n\n        if (j == 0 && i == cols) {\n\n          v[i][j] = aj;\n\n        } else {\n\n          v[i][j] = prepare(aj.clone().lerp(bj, j / rows));\n\n        }\n\n      }\n\n    }\n\n    // Construct all of the faces.\n\n    for (var i = 0; i < cols; i++) {\n\n      for (var j = 0; j < 2 * (cols - i) - 1; j++) {\n\n        var k = Math.floor(j / 2);\n\n        if (j % 2 == 0) {\n\n          make(\n          v[i][k + 1],\n          v[i + 1][k],\n          v[i][k]);\n\n\n        } else {\n\n          make(\n          v[i][k + 1],\n          v[i + 1][k + 1],\n          v[i + 1][k]);\n\n\n        }\n\n      }\n\n    }\n\n  }\n\n\n  // Angle around the Y axis, counter-clockwise when looking from above.\n\n  function azimuth(vector) {\n\n    return Math.atan2(vector.z, -vector.x);\n\n  }\n\n\n  // Angle above the XZ plane.\n\n  function inclination(vector) {\n\n    return Math.atan2(-vector.y, Math.sqrt(vector.x * vector.x + vector.z * vector.z));\n\n  }\n\n\n  // Texture fixing helper. Spheres have some odd behaviours.\n\n  function correctUV(uv, vector, azimuth) {\n\n    if (azimuth < 0 && uv.x === 1) uv = new THREE.Vector2(uv.x - 1, uv.y);\n    if (vector.x === 0 && vector.z === 0) uv = new THREE.Vector2(azimuth / 2 / Math.PI + 0.5, uv.y);\n    return uv.clone();\n\n  }\n\n\n};\n\nTHREE.PolyhedronGeometry.prototype = Object.create(THREE.Geometry.prototype);\nTHREE.PolyhedronGeometry.prototype.constructor = THREE.PolyhedronGeometry;\n\n// File:src/extras/geometries/DodecahedronGeometry.js\n\n/**\n * @author Abe Pazos / https://hamoid.com\n */\n\nTHREE.DodecahedronGeometry = function (radius, detail) {\n\n  this.parameters = {\n    radius: radius,\n    detail: detail };\n\n\n  var t = (1 + Math.sqrt(5)) / 2;\n  var r = 1 / t;\n\n  var vertices = [\n\n  // (±1, ±1, ±1)\n  -1, -1, -1, -1, -1, 1,\n  -1, 1, -1, -1, 1, 1,\n  1, -1, -1, 1, -1, 1,\n  1, 1, -1, 1, 1, 1,\n\n  // (0, ±1/φ, ±φ)\n  0, -r, -t, 0, -r, t,\n  0, r, -t, 0, r, t,\n\n  // (±1/φ, ±φ, 0)\n  -r, -t, 0, -r, t, 0,\n  r, -t, 0, r, t, 0,\n\n  // (±φ, 0, ±1/φ)\n  -t, 0, -r, t, 0, -r,\n  -t, 0, r, t, 0, r];\n\n\n  var indices = [\n  3, 11, 7, 3, 7, 15, 3, 15, 13,\n  7, 19, 17, 7, 17, 6, 7, 6, 15,\n  17, 4, 8, 17, 8, 10, 17, 10, 6,\n  8, 0, 16, 8, 16, 2, 8, 2, 10,\n  0, 12, 1, 0, 1, 18, 0, 18, 16,\n  6, 10, 2, 6, 2, 13, 6, 13, 15,\n  2, 16, 18, 2, 18, 3, 2, 3, 13,\n  18, 1, 9, 18, 9, 11, 18, 11, 3,\n  4, 14, 12, 4, 12, 0, 4, 0, 8,\n  11, 9, 5, 11, 5, 19, 11, 19, 7,\n  19, 5, 14, 19, 14, 4, 19, 4, 17,\n  1, 12, 14, 1, 14, 5, 1, 5, 9];\n\n\n  THREE.PolyhedronGeometry.call(this, vertices, indices, radius, detail);\n\n};\n\nTHREE.DodecahedronGeometry.prototype = Object.create(THREE.Geometry.prototype);\nTHREE.DodecahedronGeometry.prototype.constructor = THREE.DodecahedronGeometry;\n\n// File:src/extras/geometries/IcosahedronGeometry.js\n\n/**\n * @author timothypratley / https://github.com/timothypratley\n */\n\nTHREE.IcosahedronGeometry = function (radius, detail) {\n\n  var t = (1 + Math.sqrt(5)) / 2;\n\n  var vertices = [\n  -1, t, 0, 1, t, 0, -1, -t, 0, 1, -t, 0,\n  0, -1, t, 0, 1, t, 0, -1, -t, 0, 1, -t,\n  t, 0, -1, t, 0, 1, -t, 0, -1, -t, 0, 1];\n\n\n  var indices = [\n  0, 11, 5, 0, 5, 1, 0, 1, 7, 0, 7, 10, 0, 10, 11,\n  1, 5, 9, 5, 11, 4, 11, 10, 2, 10, 7, 6, 7, 1, 8,\n  3, 9, 4, 3, 4, 2, 3, 2, 6, 3, 6, 8, 3, 8, 9,\n  4, 9, 5, 2, 4, 11, 6, 2, 10, 8, 6, 7, 9, 8, 1];\n\n\n  THREE.PolyhedronGeometry.call(this, vertices, indices, radius, detail);\n\n  this.type = 'IcosahedronGeometry';\n\n  this.parameters = {\n    radius: radius,\n    detail: detail };\n\n};\n\nTHREE.IcosahedronGeometry.prototype = Object.create(THREE.Geometry.prototype);\nTHREE.IcosahedronGeometry.prototype.constructor = THREE.IcosahedronGeometry;\n\n// File:src/extras/geometries/OctahedronGeometry.js\n\n/**\n * @author timothypratley / https://github.com/timothypratley\n */\n\nTHREE.OctahedronGeometry = function (radius, detail) {\n\n  this.parameters = {\n    radius: radius,\n    detail: detail };\n\n\n  var vertices = [\n  1, 0, 0, -1, 0, 0, 0, 1, 0, 0, -1, 0, 0, 0, 1, 0, 0, -1];\n\n\n  var indices = [\n  0, 2, 4, 0, 4, 3, 0, 3, 5, 0, 5, 2, 1, 2, 5, 1, 5, 3, 1, 3, 4, 1, 4, 2];\n\n\n  THREE.PolyhedronGeometry.call(this, vertices, indices, radius, detail);\n\n  this.type = 'OctahedronGeometry';\n\n  this.parameters = {\n    radius: radius,\n    detail: detail };\n\n};\n\nTHREE.OctahedronGeometry.prototype = Object.create(THREE.Geometry.prototype);\nTHREE.OctahedronGeometry.prototype.constructor = THREE.OctahedronGeometry;\n\n// File:src/extras/geometries/TetrahedronGeometry.js\n\n/**\n * @author timothypratley / https://github.com/timothypratley\n */\n\nTHREE.TetrahedronGeometry = function (radius, detail) {\n\n  var vertices = [\n  1, 1, 1, -1, -1, 1, -1, 1, -1, 1, -1, -1];\n\n\n  var indices = [\n  2, 1, 0, 0, 3, 2, 1, 3, 0, 2, 3, 1];\n\n\n  THREE.PolyhedronGeometry.call(this, vertices, indices, radius, detail);\n\n  this.type = 'TetrahedronGeometry';\n\n  this.parameters = {\n    radius: radius,\n    detail: detail };\n\n\n};\n\nTHREE.TetrahedronGeometry.prototype = Object.create(THREE.Geometry.prototype);\nTHREE.TetrahedronGeometry.prototype.constructor = THREE.TetrahedronGeometry;\n\n// File:src/extras/geometries/ParametricGeometry.js\n\n/**\n * @author zz85 / https://github.com/zz85\n * Parametric Surfaces Geometry\n * based on the brilliant article by @prideout http://prideout.net/blog/?p=44\n *\n * new THREE.ParametricGeometry( parametricFunction, uSegments, ySegements );\n *\n */\n\nTHREE.ParametricGeometry = function (func, slices, stacks) {\n\n  THREE.Geometry.call(this);\n\n  this.type = 'ParametricGeometry';\n\n  this.parameters = {\n    func: func,\n    slices: slices,\n    stacks: stacks };\n\n\n  var verts = this.vertices;\n  var faces = this.faces;\n  var uvs = this.faceVertexUvs[0];\n\n  var i, j, p;\n  var u, v;\n\n  var sliceCount = slices + 1;\n\n  for (i = 0; i <= stacks; i++) {\n\n    v = i / stacks;\n\n    for (j = 0; j <= slices; j++) {\n\n      u = j / slices;\n\n      p = func(u, v);\n      verts.push(p);\n\n    }\n  }\n\n  var a, b, c, d;\n  var uva, uvb, uvc, uvd;\n\n  for (i = 0; i < stacks; i++) {\n\n    for (j = 0; j < slices; j++) {\n\n      a = i * sliceCount + j;\n      b = i * sliceCount + j + 1;\n      c = (i + 1) * sliceCount + j + 1;\n      d = (i + 1) * sliceCount + j;\n\n      uva = new THREE.Vector2(j / slices, i / stacks);\n      uvb = new THREE.Vector2((j + 1) / slices, i / stacks);\n      uvc = new THREE.Vector2((j + 1) / slices, (i + 1) / stacks);\n      uvd = new THREE.Vector2(j / slices, (i + 1) / stacks);\n\n      faces.push(new THREE.Face3(a, b, d));\n      uvs.push([uva, uvb, uvd]);\n\n      faces.push(new THREE.Face3(b, c, d));\n      uvs.push([uvb.clone(), uvc, uvd.clone()]);\n\n    }\n\n  }\n\n  // console.log(this);\n\n  // magic bullet\n  // var diff = this.mergeVertices();\n  // console.log('removed ', diff, ' vertices by merging');\n\n  this.computeFaceNormals();\n  this.computeVertexNormals();\n\n};\n\nTHREE.ParametricGeometry.prototype = Object.create(THREE.Geometry.prototype);\nTHREE.ParametricGeometry.prototype.constructor = THREE.ParametricGeometry;\n\n// File:src/extras/helpers/AxisHelper.js\n\n/**\n * @author sroucheray / http://sroucheray.org/\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.AxisHelper = function (size) {\n\n  size = size || 1;\n\n  var vertices = new Float32Array([\n  0, 0, 0, size, 0, 0,\n  0, 0, 0, 0, size, 0,\n  0, 0, 0, 0, 0, size]);\n\n\n  var colors = new Float32Array([\n  1, 0, 0, 1, 0.6, 0,\n  0, 1, 0, 0.6, 1, 0,\n  0, 0, 1, 0, 0.6, 1]);\n\n\n  var geometry = new THREE.BufferGeometry();\n  geometry.addAttribute('position', new THREE.BufferAttribute(vertices, 3));\n  geometry.addAttribute('color', new THREE.BufferAttribute(colors, 3));\n\n  var material = new THREE.LineBasicMaterial({ vertexColors: THREE.VertexColors });\n\n  THREE.Line.call(this, geometry, material, THREE.LinePieces);\n\n};\n\nTHREE.AxisHelper.prototype = Object.create(THREE.Line.prototype);\nTHREE.AxisHelper.prototype.constructor = THREE.AxisHelper;\n\n// File:src/extras/helpers/ArrowHelper.js\n\n/**\n * @author WestLangley / http://github.com/WestLangley\n * @author zz85 / http://github.com/zz85\n * @author bhouston / http://exocortex.com\n *\n * Creates an arrow for visualizing directions\n *\n * Parameters:\n *  dir - Vector3\n *  origin - Vector3\n *  length - Number\n *  color - color in hex value\n *  headLength - Number\n *  headWidth - Number\n */\n\nTHREE.ArrowHelper = function () {\n\n  var lineGeometry = new THREE.Geometry();\n  lineGeometry.vertices.push(new THREE.Vector3(0, 0, 0), new THREE.Vector3(0, 1, 0));\n\n  var coneGeometry = new THREE.CylinderGeometry(0, 0.5, 1, 5, 1);\n  coneGeometry.applyMatrix(new THREE.Matrix4().makeTranslation(0, -0.5, 0));\n\n  return function (dir, origin, length, color, headLength, headWidth) {\n\n    // dir is assumed to be normalized\n\n    THREE.Object3D.call(this);\n\n    if (color === undefined) color = 0xffff00;\n    if (length === undefined) length = 1;\n    if (headLength === undefined) headLength = 0.2 * length;\n    if (headWidth === undefined) headWidth = 0.2 * headLength;\n\n    this.position.copy(origin);\n\n    this.line = new THREE.Line(lineGeometry, new THREE.LineBasicMaterial({ color: color }));\n    this.line.matrixAutoUpdate = false;\n    this.add(this.line);\n\n    this.cone = new THREE.Mesh(coneGeometry, new THREE.MeshBasicMaterial({ color: color }));\n    this.cone.matrixAutoUpdate = false;\n    this.add(this.cone);\n\n    this.setDirection(dir);\n    this.setLength(length, headLength, headWidth);\n\n  };\n\n}();\n\nTHREE.ArrowHelper.prototype = Object.create(THREE.Object3D.prototype);\nTHREE.ArrowHelper.prototype.constructor = THREE.ArrowHelper;\n\nTHREE.ArrowHelper.prototype.setDirection = function () {\n\n  var axis = new THREE.Vector3();\n  var radians;\n\n  return function (dir) {\n\n    // dir is assumed to be normalized\n\n    if (dir.y > 0.99999) {\n\n      this.quaternion.set(0, 0, 0, 1);\n\n    } else if (dir.y < -0.99999) {\n\n      this.quaternion.set(1, 0, 0, 0);\n\n    } else {\n\n      axis.set(dir.z, 0, -dir.x).normalize();\n\n      radians = Math.acos(dir.y);\n\n      this.quaternion.setFromAxisAngle(axis, radians);\n\n    }\n\n  };\n\n}();\n\nTHREE.ArrowHelper.prototype.setLength = function (length, headLength, headWidth) {\n\n  if (headLength === undefined) headLength = 0.2 * length;\n  if (headWidth === undefined) headWidth = 0.2 * headLength;\n\n  this.line.scale.set(1, length - headLength, 1);\n  this.line.updateMatrix();\n\n  this.cone.scale.set(headWidth, headLength, headWidth);\n  this.cone.position.y = length;\n  this.cone.updateMatrix();\n\n};\n\nTHREE.ArrowHelper.prototype.setColor = function (color) {\n\n  this.line.material.color.set(color);\n  this.cone.material.color.set(color);\n\n};\n\n// File:src/extras/helpers/BoxHelper.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.BoxHelper = function (object) {\n\n  var geometry = new THREE.BufferGeometry();\n  geometry.addAttribute('position', new THREE.BufferAttribute(new Float32Array(72), 3));\n\n  THREE.Line.call(this, geometry, new THREE.LineBasicMaterial({ color: 0xffff00 }), THREE.LinePieces);\n\n  if (object !== undefined) {\n\n    this.update(object);\n\n  }\n\n};\n\nTHREE.BoxHelper.prototype = Object.create(THREE.Line.prototype);\nTHREE.BoxHelper.prototype.constructor = THREE.BoxHelper;\n\nTHREE.BoxHelper.prototype.update = function (object) {\n\n  var geometry = object.geometry;\n\n  if (geometry.boundingBox === null) {\n\n    geometry.computeBoundingBox();\n\n  }\n\n  var min = geometry.boundingBox.min;\n  var max = geometry.boundingBox.max;\n\n  /*\n                                        5____4\n                                      1/___0/|\n                                      | 6__|_7\n                                      2/___3/\n                                      \t0: max.x, max.y, max.z\n                                      1: min.x, max.y, max.z\n                                      2: min.x, min.y, max.z\n                                      3: max.x, min.y, max.z\n                                      4: max.x, max.y, min.z\n                                      5: min.x, max.y, min.z\n                                      6: min.x, min.y, min.z\n                                      7: max.x, min.y, min.z\n                                      */\n\n\n  var vertices = this.geometry.attributes.position.array;\n\n  vertices[0] = max.x;vertices[1] = max.y;vertices[2] = max.z;\n  vertices[3] = min.x;vertices[4] = max.y;vertices[5] = max.z;\n\n  vertices[6] = min.x;vertices[7] = max.y;vertices[8] = max.z;\n  vertices[9] = min.x;vertices[10] = min.y;vertices[11] = max.z;\n\n  vertices[12] = min.x;vertices[13] = min.y;vertices[14] = max.z;\n  vertices[15] = max.x;vertices[16] = min.y;vertices[17] = max.z;\n\n  vertices[18] = max.x;vertices[19] = min.y;vertices[20] = max.z;\n  vertices[21] = max.x;vertices[22] = max.y;vertices[23] = max.z;\n\n  //\n\n  vertices[24] = max.x;vertices[25] = max.y;vertices[26] = min.z;\n  vertices[27] = min.x;vertices[28] = max.y;vertices[29] = min.z;\n\n  vertices[30] = min.x;vertices[31] = max.y;vertices[32] = min.z;\n  vertices[33] = min.x;vertices[34] = min.y;vertices[35] = min.z;\n\n  vertices[36] = min.x;vertices[37] = min.y;vertices[38] = min.z;\n  vertices[39] = max.x;vertices[40] = min.y;vertices[41] = min.z;\n\n  vertices[42] = max.x;vertices[43] = min.y;vertices[44] = min.z;\n  vertices[45] = max.x;vertices[46] = max.y;vertices[47] = min.z;\n\n  //\n\n  vertices[48] = max.x;vertices[49] = max.y;vertices[50] = max.z;\n  vertices[51] = max.x;vertices[52] = max.y;vertices[53] = min.z;\n\n  vertices[54] = min.x;vertices[55] = max.y;vertices[56] = max.z;\n  vertices[57] = min.x;vertices[58] = max.y;vertices[59] = min.z;\n\n  vertices[60] = min.x;vertices[61] = min.y;vertices[62] = max.z;\n  vertices[63] = min.x;vertices[64] = min.y;vertices[65] = min.z;\n\n  vertices[66] = max.x;vertices[67] = min.y;vertices[68] = max.z;\n  vertices[69] = max.x;vertices[70] = min.y;vertices[71] = min.z;\n\n  this.geometry.attributes.position.needsUpdate = true;\n\n  this.geometry.computeBoundingSphere();\n\n  this.matrix = object.matrixWorld;\n  this.matrixAutoUpdate = false;\n\n};\n\n// File:src/extras/helpers/BoundingBoxHelper.js\n\n/**\n * @author WestLangley / http://github.com/WestLangley\n */\n\n// a helper to show the world-axis-aligned bounding box for an object\n\nTHREE.BoundingBoxHelper = function (object, hex) {\n\n  var color = hex !== undefined ? hex : 0x888888;\n\n  this.object = object;\n\n  this.box = new THREE.Box3();\n\n  THREE.Mesh.call(this, new THREE.BoxGeometry(1, 1, 1), new THREE.MeshBasicMaterial({ color: color, wireframe: true }));\n\n};\n\nTHREE.BoundingBoxHelper.prototype = Object.create(THREE.Mesh.prototype);\nTHREE.BoundingBoxHelper.prototype.constructor = THREE.BoundingBoxHelper;\n\nTHREE.BoundingBoxHelper.prototype.update = function () {\n\n  this.box.setFromObject(this.object);\n\n  this.box.size(this.scale);\n\n  this.box.center(this.position);\n\n};\n\n// File:src/extras/helpers/CameraHelper.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n *\n *\t- shows frustum, line of sight and up of the camera\n *\t- suitable for fast updates\n * \t- based on frustum visualization in lightgl.js shadowmap example\n *\t\thttp://evanw.github.com/lightgl.js/tests/shadowmap.html\n */\n\nTHREE.CameraHelper = function (camera) {\n\n  var geometry = new THREE.Geometry();\n  var material = new THREE.LineBasicMaterial({ color: 0xffffff, vertexColors: THREE.FaceColors });\n\n  var pointMap = {};\n\n  // colors\n\n  var hexFrustum = 0xffaa00;\n  var hexCone = 0xff0000;\n  var hexUp = 0x00aaff;\n  var hexTarget = 0xffffff;\n  var hexCross = 0x333333;\n\n  // near\n\n  addLine(\"n1\", \"n2\", hexFrustum);\n  addLine(\"n2\", \"n4\", hexFrustum);\n  addLine(\"n4\", \"n3\", hexFrustum);\n  addLine(\"n3\", \"n1\", hexFrustum);\n\n  // far\n\n  addLine(\"f1\", \"f2\", hexFrustum);\n  addLine(\"f2\", \"f4\", hexFrustum);\n  addLine(\"f4\", \"f3\", hexFrustum);\n  addLine(\"f3\", \"f1\", hexFrustum);\n\n  // sides\n\n  addLine(\"n1\", \"f1\", hexFrustum);\n  addLine(\"n2\", \"f2\", hexFrustum);\n  addLine(\"n3\", \"f3\", hexFrustum);\n  addLine(\"n4\", \"f4\", hexFrustum);\n\n  // cone\n\n  addLine(\"p\", \"n1\", hexCone);\n  addLine(\"p\", \"n2\", hexCone);\n  addLine(\"p\", \"n3\", hexCone);\n  addLine(\"p\", \"n4\", hexCone);\n\n  // up\n\n  addLine(\"u1\", \"u2\", hexUp);\n  addLine(\"u2\", \"u3\", hexUp);\n  addLine(\"u3\", \"u1\", hexUp);\n\n  // target\n\n  addLine(\"c\", \"t\", hexTarget);\n  addLine(\"p\", \"c\", hexCross);\n\n  // cross\n\n  addLine(\"cn1\", \"cn2\", hexCross);\n  addLine(\"cn3\", \"cn4\", hexCross);\n\n  addLine(\"cf1\", \"cf2\", hexCross);\n  addLine(\"cf3\", \"cf4\", hexCross);\n\n  function addLine(a, b, hex) {\n\n    addPoint(a, hex);\n    addPoint(b, hex);\n\n  }\n\n  function addPoint(id, hex) {\n\n    geometry.vertices.push(new THREE.Vector3());\n    geometry.colors.push(new THREE.Color(hex));\n\n    if (pointMap[id] === undefined) {\n\n      pointMap[id] = [];\n\n    }\n\n    pointMap[id].push(geometry.vertices.length - 1);\n\n  }\n\n  THREE.Line.call(this, geometry, material, THREE.LinePieces);\n\n  this.camera = camera;\n  this.matrix = camera.matrixWorld;\n  this.matrixAutoUpdate = false;\n\n  this.pointMap = pointMap;\n\n  this.update();\n\n};\n\nTHREE.CameraHelper.prototype = Object.create(THREE.Line.prototype);\nTHREE.CameraHelper.prototype.constructor = THREE.CameraHelper;\n\nTHREE.CameraHelper.prototype.update = function () {\n\n  var geometry, pointMap;\n\n  var vector = new THREE.Vector3();\n  var camera = new THREE.Camera();\n\n  var setPoint = function setPoint(point, x, y, z) {\n\n    vector.set(x, y, z).unproject(camera);\n\n    var points = pointMap[point];\n\n    if (points !== undefined) {\n\n      for (var i = 0, il = points.length; i < il; i++) {\n\n        geometry.vertices[points[i]].copy(vector);\n\n      }\n\n    }\n\n  };\n\n  return function () {\n\n    geometry = this.geometry;\n    pointMap = this.pointMap;\n\n    var w = 1,h = 1;\n\n    // we need just camera projection matrix\n    // world matrix must be identity\n\n    camera.projectionMatrix.copy(this.camera.projectionMatrix);\n\n    // center / target\n\n    setPoint(\"c\", 0, 0, -1);\n    setPoint(\"t\", 0, 0, 1);\n\n    // near\n\n    setPoint(\"n1\", -w, -h, -1);\n    setPoint(\"n2\", w, -h, -1);\n    setPoint(\"n3\", -w, h, -1);\n    setPoint(\"n4\", w, h, -1);\n\n    // far\n\n    setPoint(\"f1\", -w, -h, 1);\n    setPoint(\"f2\", w, -h, 1);\n    setPoint(\"f3\", -w, h, 1);\n    setPoint(\"f4\", w, h, 1);\n\n    // up\n\n    setPoint(\"u1\", w * 0.7, h * 1.1, -1);\n    setPoint(\"u2\", -w * 0.7, h * 1.1, -1);\n    setPoint(\"u3\", 0, h * 2, -1);\n\n    // cross\n\n    setPoint(\"cf1\", -w, 0, 1);\n    setPoint(\"cf2\", w, 0, 1);\n    setPoint(\"cf3\", 0, -h, 1);\n    setPoint(\"cf4\", 0, h, 1);\n\n    setPoint(\"cn1\", -w, 0, -1);\n    setPoint(\"cn2\", w, 0, -1);\n    setPoint(\"cn3\", 0, -h, -1);\n    setPoint(\"cn4\", 0, h, -1);\n\n    geometry.verticesNeedUpdate = true;\n\n  };\n\n}();\n\n// File:src/extras/helpers/DirectionalLightHelper.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n * @author mrdoob / http://mrdoob.com/\n * @author WestLangley / http://github.com/WestLangley\n */\n\nTHREE.DirectionalLightHelper = function (light, size) {\n\n  THREE.Object3D.call(this);\n\n  this.light = light;\n  this.light.updateMatrixWorld();\n\n  this.matrix = light.matrixWorld;\n  this.matrixAutoUpdate = false;\n\n  size = size || 1;\n\n  var geometry = new THREE.Geometry();\n  geometry.vertices.push(\n  new THREE.Vector3(-size, size, 0),\n  new THREE.Vector3(size, size, 0),\n  new THREE.Vector3(size, -size, 0),\n  new THREE.Vector3(-size, -size, 0),\n  new THREE.Vector3(-size, size, 0));\n\n\n  var material = new THREE.LineBasicMaterial({ fog: false });\n  material.color.copy(this.light.color).multiplyScalar(this.light.intensity);\n\n  this.lightPlane = new THREE.Line(geometry, material);\n  this.add(this.lightPlane);\n\n  geometry = new THREE.Geometry();\n  geometry.vertices.push(\n  new THREE.Vector3(),\n  new THREE.Vector3());\n\n\n  material = new THREE.LineBasicMaterial({ fog: false });\n  material.color.copy(this.light.color).multiplyScalar(this.light.intensity);\n\n  this.targetLine = new THREE.Line(geometry, material);\n  this.add(this.targetLine);\n\n  this.update();\n\n};\n\nTHREE.DirectionalLightHelper.prototype = Object.create(THREE.Object3D.prototype);\nTHREE.DirectionalLightHelper.prototype.constructor = THREE.DirectionalLightHelper;\n\nTHREE.DirectionalLightHelper.prototype.dispose = function () {\n\n  this.lightPlane.geometry.dispose();\n  this.lightPlane.material.dispose();\n  this.targetLine.geometry.dispose();\n  this.targetLine.material.dispose();\n};\n\nTHREE.DirectionalLightHelper.prototype.update = function () {\n\n  var v1 = new THREE.Vector3();\n  var v2 = new THREE.Vector3();\n  var v3 = new THREE.Vector3();\n\n  return function () {\n\n    v1.setFromMatrixPosition(this.light.matrixWorld);\n    v2.setFromMatrixPosition(this.light.target.matrixWorld);\n    v3.subVectors(v2, v1);\n\n    this.lightPlane.lookAt(v3);\n    this.lightPlane.material.color.copy(this.light.color).multiplyScalar(this.light.intensity);\n\n    this.targetLine.geometry.vertices[1].copy(v3);\n    this.targetLine.geometry.verticesNeedUpdate = true;\n    this.targetLine.material.color.copy(this.lightPlane.material.color);\n\n  };\n\n}();\n\n// File:src/extras/helpers/EdgesHelper.js\n\n/**\n * @author WestLangley / http://github.com/WestLangley\n * @param object THREE.Mesh whose geometry will be used\n * @param hex line color\n * @param thresholdAngle the minimim angle (in degrees),\n * between the face normals of adjacent faces,\n * that is required to render an edge. A value of 10 means\n * an edge is only rendered if the angle is at least 10 degrees.\n */\n\nTHREE.EdgesHelper = function (object, hex, thresholdAngle) {\n\n  var color = hex !== undefined ? hex : 0xffffff;\n  thresholdAngle = thresholdAngle !== undefined ? thresholdAngle : 1;\n\n  var thresholdDot = Math.cos(THREE.Math.degToRad(thresholdAngle));\n\n  var edge = [0, 0],hash = {};\n  var sortFunction = function sortFunction(a, b) {return a - b;};\n\n  var keys = ['a', 'b', 'c'];\n  var geometry = new THREE.BufferGeometry();\n\n  var geometry2;\n\n  if (object.geometry instanceof THREE.BufferGeometry) {\n\n    geometry2 = new THREE.Geometry();\n    geometry2.fromBufferGeometry(object.geometry);\n\n  } else {\n\n    geometry2 = object.geometry.clone();\n\n  }\n\n  geometry2.mergeVertices();\n  geometry2.computeFaceNormals();\n\n  var vertices = geometry2.vertices;\n  var faces = geometry2.faces;\n  var numEdges = 0;\n\n  for (var i = 0, l = faces.length; i < l; i++) {\n\n    var face = faces[i];\n\n    for (var j = 0; j < 3; j++) {\n\n      edge[0] = face[keys[j]];\n      edge[1] = face[keys[(j + 1) % 3]];\n      edge.sort(sortFunction);\n\n      var key = edge.toString();\n\n      if (hash[key] === undefined) {\n\n        hash[key] = { vert1: edge[0], vert2: edge[1], face1: i, face2: undefined };\n        numEdges++;\n\n      } else {\n\n        hash[key].face2 = i;\n\n      }\n\n    }\n\n  }\n\n  var coords = new Float32Array(numEdges * 2 * 3);\n\n  var index = 0;\n\n  for (var key in hash) {\n\n    var h = hash[key];\n\n    if (h.face2 === undefined || faces[h.face1].normal.dot(faces[h.face2].normal) <= thresholdDot) {\n\n      var vertex = vertices[h.vert1];\n      coords[index++] = vertex.x;\n      coords[index++] = vertex.y;\n      coords[index++] = vertex.z;\n\n      vertex = vertices[h.vert2];\n      coords[index++] = vertex.x;\n      coords[index++] = vertex.y;\n      coords[index++] = vertex.z;\n\n    }\n\n  }\n\n  geometry.addAttribute('position', new THREE.BufferAttribute(coords, 3));\n\n  THREE.Line.call(this, geometry, new THREE.LineBasicMaterial({ color: color }), THREE.LinePieces);\n\n  this.matrix = object.matrixWorld;\n  this.matrixAutoUpdate = false;\n\n};\n\nTHREE.EdgesHelper.prototype = Object.create(THREE.Line.prototype);\nTHREE.EdgesHelper.prototype.constructor = THREE.EdgesHelper;\n\n// File:src/extras/helpers/FaceNormalsHelper.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author WestLangley / http://github.com/WestLangley\n*/\n\nTHREE.FaceNormalsHelper = function (object, size, hex, linewidth) {\n\n  this.object = object;\n\n  this.size = size !== undefined ? size : 1;\n\n  var color = hex !== undefined ? hex : 0xffff00;\n\n  var width = linewidth !== undefined ? linewidth : 1;\n\n  var geometry = new THREE.Geometry();\n\n  var faces = this.object.geometry.faces;\n\n  for (var i = 0, l = faces.length; i < l; i++) {\n\n    geometry.vertices.push(new THREE.Vector3(), new THREE.Vector3());\n\n  }\n\n  THREE.Line.call(this, geometry, new THREE.LineBasicMaterial({ color: color, linewidth: width }), THREE.LinePieces);\n\n  this.matrixAutoUpdate = false;\n\n  this.normalMatrix = new THREE.Matrix3();\n\n  this.update();\n\n};\n\nTHREE.FaceNormalsHelper.prototype = Object.create(THREE.Line.prototype);\nTHREE.FaceNormalsHelper.prototype.constructor = THREE.FaceNormalsHelper;\n\nTHREE.FaceNormalsHelper.prototype.update = function () {\n\n  var vertices = this.geometry.vertices;\n\n  var object = this.object;\n  var objectVertices = object.geometry.vertices;\n  var objectFaces = object.geometry.faces;\n  var objectWorldMatrix = object.matrixWorld;\n\n  object.updateMatrixWorld(true);\n\n  this.normalMatrix.getNormalMatrix(objectWorldMatrix);\n\n  for (var i = 0, i2 = 0, l = objectFaces.length; i < l; i++, i2 += 2) {\n\n    var face = objectFaces[i];\n\n    vertices[i2].copy(objectVertices[face.a]).\n    add(objectVertices[face.b]).\n    add(objectVertices[face.c]).\n    divideScalar(3).\n    applyMatrix4(objectWorldMatrix);\n\n    vertices[i2 + 1].copy(face.normal).\n    applyMatrix3(this.normalMatrix).\n    normalize().\n    multiplyScalar(this.size).\n    add(vertices[i2]);\n\n  }\n\n  this.geometry.verticesNeedUpdate = true;\n\n  return this;\n\n};\n\n\n// File:src/extras/helpers/GridHelper.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.GridHelper = function (size, step) {\n\n  var geometry = new THREE.Geometry();\n  var material = new THREE.LineBasicMaterial({ vertexColors: THREE.VertexColors });\n\n  this.color1 = new THREE.Color(0x444444);\n  this.color2 = new THREE.Color(0x888888);\n\n  for (var i = -size; i <= size; i += step) {\n\n    geometry.vertices.push(\n    new THREE.Vector3(-size, 0, i), new THREE.Vector3(size, 0, i),\n    new THREE.Vector3(i, 0, -size), new THREE.Vector3(i, 0, size));\n\n\n    var color = i === 0 ? this.color1 : this.color2;\n\n    geometry.colors.push(color, color, color, color);\n\n  }\n\n  THREE.Line.call(this, geometry, material, THREE.LinePieces);\n\n};\n\nTHREE.GridHelper.prototype = Object.create(THREE.Line.prototype);\nTHREE.GridHelper.prototype.constructor = THREE.GridHelper;\n\nTHREE.GridHelper.prototype.setColors = function (colorCenterLine, colorGrid) {\n\n  this.color1.set(colorCenterLine);\n  this.color2.set(colorGrid);\n\n  this.geometry.colorsNeedUpdate = true;\n\n};\n\n// File:src/extras/helpers/HemisphereLightHelper.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.HemisphereLightHelper = function (light, sphereSize) {\n\n  THREE.Object3D.call(this);\n\n  this.light = light;\n  this.light.updateMatrixWorld();\n\n  this.matrix = light.matrixWorld;\n  this.matrixAutoUpdate = false;\n\n  this.colors = [new THREE.Color(), new THREE.Color()];\n\n  var geometry = new THREE.SphereGeometry(sphereSize, 4, 2);\n  geometry.applyMatrix(new THREE.Matrix4().makeRotationX(-Math.PI / 2));\n\n  for (var i = 0, il = 8; i < il; i++) {\n\n    geometry.faces[i].color = this.colors[i < 4 ? 0 : 1];\n\n  }\n\n  var material = new THREE.MeshBasicMaterial({ vertexColors: THREE.FaceColors, wireframe: true });\n\n  this.lightSphere = new THREE.Mesh(geometry, material);\n  this.add(this.lightSphere);\n\n  this.update();\n\n};\n\nTHREE.HemisphereLightHelper.prototype = Object.create(THREE.Object3D.prototype);\nTHREE.HemisphereLightHelper.prototype.constructor = THREE.HemisphereLightHelper;\n\nTHREE.HemisphereLightHelper.prototype.dispose = function () {\n  this.lightSphere.geometry.dispose();\n  this.lightSphere.material.dispose();\n};\n\nTHREE.HemisphereLightHelper.prototype.update = function () {\n\n  var vector = new THREE.Vector3();\n\n  return function () {\n\n    this.colors[0].copy(this.light.color).multiplyScalar(this.light.intensity);\n    this.colors[1].copy(this.light.groundColor).multiplyScalar(this.light.intensity);\n\n    this.lightSphere.lookAt(vector.setFromMatrixPosition(this.light.matrixWorld).negate());\n    this.lightSphere.geometry.colorsNeedUpdate = true;\n\n  };\n\n}();\n\n// File:src/extras/helpers/PointLightHelper.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.PointLightHelper = function (light, sphereSize) {\n\n  this.light = light;\n  this.light.updateMatrixWorld();\n\n  var geometry = new THREE.SphereGeometry(sphereSize, 4, 2);\n  var material = new THREE.MeshBasicMaterial({ wireframe: true, fog: false });\n  material.color.copy(this.light.color).multiplyScalar(this.light.intensity);\n\n  THREE.Mesh.call(this, geometry, material);\n\n  this.matrix = this.light.matrixWorld;\n  this.matrixAutoUpdate = false;\n\n  /*\n                                 var distanceGeometry = new THREE.IcosahedronGeometry( 1, 2 );\n                                 var distanceMaterial = new THREE.MeshBasicMaterial( { color: hexColor, fog: false, wireframe: true, opacity: 0.1, transparent: true } );\n                                 \tthis.lightSphere = new THREE.Mesh( bulbGeometry, bulbMaterial );\n                                 this.lightDistance = new THREE.Mesh( distanceGeometry, distanceMaterial );\n                                 \tvar d = light.distance;\n                                 \tif ( d === 0.0 ) {\n                                 \t\tthis.lightDistance.visible = false;\n                                 \t} else {\n                                 \t\tthis.lightDistance.scale.set( d, d, d );\n                                 \t}\n                                 \tthis.add( this.lightDistance );\n                                 */\n\n\n\n\n\n\n\n\n\n};\n\nTHREE.PointLightHelper.prototype = Object.create(THREE.Mesh.prototype);\nTHREE.PointLightHelper.prototype.constructor = THREE.PointLightHelper;\n\nTHREE.PointLightHelper.prototype.dispose = function () {\n\n  this.geometry.dispose();\n  this.material.dispose();\n};\n\nTHREE.PointLightHelper.prototype.update = function () {\n\n  this.material.color.copy(this.light.color).multiplyScalar(this.light.intensity);\n\n  /*\n                                                                                   var d = this.light.distance;\n                                                                                   \tif ( d === 0.0 ) {\n                                                                                   \t\tthis.lightDistance.visible = false;\n                                                                                   \t} else {\n                                                                                   \t\tthis.lightDistance.visible = true;\n                                                                                   \tthis.lightDistance.scale.set( d, d, d );\n                                                                                   \t}\n                                                                                   */\n\n\n\n\n\n\n};\n\n// File:src/extras/helpers/SkeletonHelper.js\n\n/**\n * @author Sean Griffin / http://twitter.com/sgrif\n * @author Michael Guerrero / http://realitymeltdown.com\n * @author mrdoob / http://mrdoob.com/\n * @author ikerr / http://verold.com\n */\n\nTHREE.SkeletonHelper = function (object) {\n\n  this.bones = this.getBoneList(object);\n\n  var geometry = new THREE.Geometry();\n\n  for (var i = 0; i < this.bones.length; i++) {\n\n    var bone = this.bones[i];\n\n    if (bone.parent instanceof THREE.Bone) {\n\n      geometry.vertices.push(new THREE.Vector3());\n      geometry.vertices.push(new THREE.Vector3());\n      geometry.colors.push(new THREE.Color(0, 0, 1));\n      geometry.colors.push(new THREE.Color(0, 1, 0));\n\n    }\n\n  }\n\n  var material = new THREE.LineBasicMaterial({ vertexColors: THREE.VertexColors, depthTest: false, depthWrite: false, transparent: true });\n\n  THREE.Line.call(this, geometry, material, THREE.LinePieces);\n\n  this.root = object;\n\n  this.matrix = object.matrixWorld;\n  this.matrixAutoUpdate = false;\n\n  this.update();\n\n};\n\n\nTHREE.SkeletonHelper.prototype = Object.create(THREE.Line.prototype);\nTHREE.SkeletonHelper.prototype.constructor = THREE.SkeletonHelper;\n\nTHREE.SkeletonHelper.prototype.getBoneList = function (object) {\n\n  var boneList = [];\n\n  if (object instanceof THREE.Bone) {\n\n    boneList.push(object);\n\n  }\n\n  for (var i = 0; i < object.children.length; i++) {\n\n    boneList.push.apply(boneList, this.getBoneList(object.children[i]));\n\n  }\n\n  return boneList;\n\n};\n\nTHREE.SkeletonHelper.prototype.update = function () {\n\n  var geometry = this.geometry;\n\n  var matrixWorldInv = new THREE.Matrix4().getInverse(this.root.matrixWorld);\n\n  var boneMatrix = new THREE.Matrix4();\n\n  var j = 0;\n\n  for (var i = 0; i < this.bones.length; i++) {\n\n    var bone = this.bones[i];\n\n    if (bone.parent instanceof THREE.Bone) {\n\n      boneMatrix.multiplyMatrices(matrixWorldInv, bone.matrixWorld);\n      geometry.vertices[j].setFromMatrixPosition(boneMatrix);\n\n      boneMatrix.multiplyMatrices(matrixWorldInv, bone.parent.matrixWorld);\n      geometry.vertices[j + 1].setFromMatrixPosition(boneMatrix);\n\n      j += 2;\n\n    }\n\n  }\n\n  geometry.verticesNeedUpdate = true;\n\n  geometry.computeBoundingSphere();\n\n};\n\n// File:src/extras/helpers/SpotLightHelper.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n * @author mrdoob / http://mrdoob.com/\n * @author WestLangley / http://github.com/WestLangley\n*/\n\nTHREE.SpotLightHelper = function (light) {\n\n  THREE.Object3D.call(this);\n\n  this.light = light;\n  this.light.updateMatrixWorld();\n\n  this.matrix = light.matrixWorld;\n  this.matrixAutoUpdate = false;\n\n  var geometry = new THREE.CylinderGeometry(0, 1, 1, 8, 1, true);\n\n  geometry.applyMatrix(new THREE.Matrix4().makeTranslation(0, -0.5, 0));\n  geometry.applyMatrix(new THREE.Matrix4().makeRotationX(-Math.PI / 2));\n\n  var material = new THREE.MeshBasicMaterial({ wireframe: true, fog: false });\n\n  this.cone = new THREE.Mesh(geometry, material);\n  this.add(this.cone);\n\n  this.update();\n\n};\n\nTHREE.SpotLightHelper.prototype = Object.create(THREE.Object3D.prototype);\nTHREE.SpotLightHelper.prototype.constructor = THREE.SpotLightHelper;\n\nTHREE.SpotLightHelper.prototype.dispose = function () {\n  this.cone.geometry.dispose();\n  this.cone.material.dispose();\n};\n\nTHREE.SpotLightHelper.prototype.update = function () {\n\n  var vector = new THREE.Vector3();\n  var vector2 = new THREE.Vector3();\n\n  return function () {\n\n    var coneLength = this.light.distance ? this.light.distance : 10000;\n    var coneWidth = coneLength * Math.tan(this.light.angle);\n\n    this.cone.scale.set(coneWidth, coneWidth, coneLength);\n\n    vector.setFromMatrixPosition(this.light.matrixWorld);\n    vector2.setFromMatrixPosition(this.light.target.matrixWorld);\n\n    this.cone.lookAt(vector2.sub(vector));\n\n    this.cone.material.color.copy(this.light.color).multiplyScalar(this.light.intensity);\n\n  };\n\n}();\n\n// File:src/extras/helpers/VertexNormalsHelper.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author WestLangley / http://github.com/WestLangley\n*/\n\nTHREE.VertexNormalsHelper = function (object, size, hex, linewidth) {\n\n  this.object = object;\n\n  this.size = size !== undefined ? size : 1;\n\n  var color = hex !== undefined ? hex : 0xff0000;\n\n  var width = linewidth !== undefined ? linewidth : 1;\n\n  var geometry = new THREE.Geometry();\n\n  var faces = object.geometry.faces;\n\n  for (var i = 0, l = faces.length; i < l; i++) {\n\n    var face = faces[i];\n\n    for (var j = 0, jl = face.vertexNormals.length; j < jl; j++) {\n\n      geometry.vertices.push(new THREE.Vector3(), new THREE.Vector3());\n\n    }\n\n  }\n\n  THREE.Line.call(this, geometry, new THREE.LineBasicMaterial({ color: color, linewidth: width }), THREE.LinePieces);\n\n  this.matrixAutoUpdate = false;\n\n  this.normalMatrix = new THREE.Matrix3();\n\n  this.update();\n\n};\n\nTHREE.VertexNormalsHelper.prototype = Object.create(THREE.Line.prototype);\nTHREE.VertexNormalsHelper.prototype.constructor = THREE.VertexNormalsHelper;\n\nTHREE.VertexNormalsHelper.prototype.update = function (object) {\n\n  var v1 = new THREE.Vector3();\n\n  return function (object) {\n\n    var keys = ['a', 'b', 'c', 'd'];\n\n    this.object.updateMatrixWorld(true);\n\n    this.normalMatrix.getNormalMatrix(this.object.matrixWorld);\n\n    var vertices = this.geometry.vertices;\n\n    var verts = this.object.geometry.vertices;\n\n    var faces = this.object.geometry.faces;\n\n    var worldMatrix = this.object.matrixWorld;\n\n    var idx = 0;\n\n    for (var i = 0, l = faces.length; i < l; i++) {\n\n      var face = faces[i];\n\n      for (var j = 0, jl = face.vertexNormals.length; j < jl; j++) {\n\n        var vertexId = face[keys[j]];\n        var vertex = verts[vertexId];\n\n        var normal = face.vertexNormals[j];\n\n        vertices[idx].copy(vertex).applyMatrix4(worldMatrix);\n\n        v1.copy(normal).applyMatrix3(this.normalMatrix).normalize().multiplyScalar(this.size);\n\n        v1.add(vertices[idx]);\n        idx = idx + 1;\n\n        vertices[idx].copy(v1);\n        idx = idx + 1;\n\n      }\n\n    }\n\n    this.geometry.verticesNeedUpdate = true;\n\n    return this;\n\n  };\n\n}();\n\n// File:src/extras/helpers/VertexTangentsHelper.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n * @author WestLangley / http://github.com/WestLangley\n*/\n\nTHREE.VertexTangentsHelper = function (object, size, hex, linewidth) {\n\n  this.object = object;\n\n  this.size = size !== undefined ? size : 1;\n\n  var color = hex !== undefined ? hex : 0x0000ff;\n\n  var width = linewidth !== undefined ? linewidth : 1;\n\n  var geometry = new THREE.Geometry();\n\n  var faces = object.geometry.faces;\n\n  for (var i = 0, l = faces.length; i < l; i++) {\n\n    var face = faces[i];\n\n    for (var j = 0, jl = face.vertexTangents.length; j < jl; j++) {\n\n      geometry.vertices.push(new THREE.Vector3());\n      geometry.vertices.push(new THREE.Vector3());\n\n    }\n\n  }\n\n  THREE.Line.call(this, geometry, new THREE.LineBasicMaterial({ color: color, linewidth: width }), THREE.LinePieces);\n\n  this.matrixAutoUpdate = false;\n\n  this.update();\n\n};\n\nTHREE.VertexTangentsHelper.prototype = Object.create(THREE.Line.prototype);\nTHREE.VertexTangentsHelper.prototype.constructor = THREE.VertexTangentsHelper;\n\nTHREE.VertexTangentsHelper.prototype.update = function (object) {\n\n  var v1 = new THREE.Vector3();\n\n  return function (object) {\n\n    var keys = ['a', 'b', 'c', 'd'];\n\n    this.object.updateMatrixWorld(true);\n\n    var vertices = this.geometry.vertices;\n\n    var verts = this.object.geometry.vertices;\n\n    var faces = this.object.geometry.faces;\n\n    var worldMatrix = this.object.matrixWorld;\n\n    var idx = 0;\n\n    for (var i = 0, l = faces.length; i < l; i++) {\n\n      var face = faces[i];\n\n      for (var j = 0, jl = face.vertexTangents.length; j < jl; j++) {\n\n        var vertexId = face[keys[j]];\n        var vertex = verts[vertexId];\n\n        var tangent = face.vertexTangents[j];\n\n        vertices[idx].copy(vertex).applyMatrix4(worldMatrix);\n\n        v1.copy(tangent).transformDirection(worldMatrix).multiplyScalar(this.size);\n\n        v1.add(vertices[idx]);\n        idx = idx + 1;\n\n        vertices[idx].copy(v1);\n        idx = idx + 1;\n\n      }\n\n    }\n\n    this.geometry.verticesNeedUpdate = true;\n\n    return this;\n\n  };\n\n}();\n\n// File:src/extras/helpers/WireframeHelper.js\n\n/**\n * @author mrdoob / http://mrdoob.com/\n */\n\nTHREE.WireframeHelper = function (object, hex) {\n\n  var color = hex !== undefined ? hex : 0xffffff;\n\n  var edge = [0, 0],hash = {};\n  var sortFunction = function sortFunction(a, b) {return a - b;};\n\n  var keys = ['a', 'b', 'c'];\n  var geometry = new THREE.BufferGeometry();\n\n  if (object.geometry instanceof THREE.Geometry) {\n\n    var vertices = object.geometry.vertices;\n    var faces = object.geometry.faces;\n    var numEdges = 0;\n\n    // allocate maximal size\n    var edges = new Uint32Array(6 * faces.length);\n\n    for (var i = 0, l = faces.length; i < l; i++) {\n\n      var face = faces[i];\n\n      for (var j = 0; j < 3; j++) {\n\n        edge[0] = face[keys[j]];\n        edge[1] = face[keys[(j + 1) % 3]];\n        edge.sort(sortFunction);\n\n        var key = edge.toString();\n\n        if (hash[key] === undefined) {\n\n          edges[2 * numEdges] = edge[0];\n          edges[2 * numEdges + 1] = edge[1];\n          hash[key] = true;\n          numEdges++;\n\n        }\n\n      }\n\n    }\n\n    var coords = new Float32Array(numEdges * 2 * 3);\n\n    for (var i = 0, l = numEdges; i < l; i++) {\n\n      for (var j = 0; j < 2; j++) {\n\n        var vertex = vertices[edges[2 * i + j]];\n\n        var index = 6 * i + 3 * j;\n        coords[index + 0] = vertex.x;\n        coords[index + 1] = vertex.y;\n        coords[index + 2] = vertex.z;\n\n      }\n\n    }\n\n    geometry.addAttribute('position', new THREE.BufferAttribute(coords, 3));\n\n  } else if (object.geometry instanceof THREE.BufferGeometry) {\n\n    if (object.geometry.attributes.index !== undefined) {// Indexed BufferGeometry\n\n      var vertices = object.geometry.attributes.position.array;\n      var indices = object.geometry.attributes.index.array;\n      var drawcalls = object.geometry.drawcalls;\n      var numEdges = 0;\n\n      if (drawcalls.length === 0) {\n\n        drawcalls = [{ count: indices.length, index: 0, start: 0 }];\n\n      }\n\n      // allocate maximal size\n      var edges = new Uint32Array(2 * indices.length);\n\n      for (var o = 0, ol = drawcalls.length; o < ol; ++o) {\n\n        var start = drawcalls[o].start;\n        var count = drawcalls[o].count;\n        var index = drawcalls[o].index;\n\n        for (var i = start, il = start + count; i < il; i += 3) {\n\n          for (var j = 0; j < 3; j++) {\n\n            edge[0] = index + indices[i + j];\n            edge[1] = index + indices[i + (j + 1) % 3];\n            edge.sort(sortFunction);\n\n            var key = edge.toString();\n\n            if (hash[key] === undefined) {\n\n              edges[2 * numEdges] = edge[0];\n              edges[2 * numEdges + 1] = edge[1];\n              hash[key] = true;\n              numEdges++;\n\n            }\n\n          }\n\n        }\n\n      }\n\n      var coords = new Float32Array(numEdges * 2 * 3);\n\n      for (var i = 0, l = numEdges; i < l; i++) {\n\n        for (var j = 0; j < 2; j++) {\n\n          var index = 6 * i + 3 * j;\n          var index2 = 3 * edges[2 * i + j];\n          coords[index + 0] = vertices[index2];\n          coords[index + 1] = vertices[index2 + 1];\n          coords[index + 2] = vertices[index2 + 2];\n\n        }\n\n      }\n\n      geometry.addAttribute('position', new THREE.BufferAttribute(coords, 3));\n\n    } else {// non-indexed BufferGeometry\n\n      var vertices = object.geometry.attributes.position.array;\n      var numEdges = vertices.length / 3;\n      var numTris = numEdges / 3;\n\n      var coords = new Float32Array(numEdges * 2 * 3);\n\n      for (var i = 0, l = numTris; i < l; i++) {\n\n        for (var j = 0; j < 3; j++) {\n\n          var index = 18 * i + 6 * j;\n\n          var index1 = 9 * i + 3 * j;\n          coords[index + 0] = vertices[index1];\n          coords[index + 1] = vertices[index1 + 1];\n          coords[index + 2] = vertices[index1 + 2];\n\n          var index2 = 9 * i + 3 * ((j + 1) % 3);\n          coords[index + 3] = vertices[index2];\n          coords[index + 4] = vertices[index2 + 1];\n          coords[index + 5] = vertices[index2 + 2];\n\n        }\n\n      }\n\n      geometry.addAttribute('position', new THREE.BufferAttribute(coords, 3));\n\n    }\n\n  }\n\n  THREE.Line.call(this, geometry, new THREE.LineBasicMaterial({ color: color }), THREE.LinePieces);\n\n  this.matrix = object.matrixWorld;\n  this.matrixAutoUpdate = false;\n\n};\n\nTHREE.WireframeHelper.prototype = Object.create(THREE.Line.prototype);\nTHREE.WireframeHelper.prototype.constructor = THREE.WireframeHelper;\n\n// File:src/extras/objects/ImmediateRenderObject.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.ImmediateRenderObject = function () {\n\n  THREE.Object3D.call(this);\n\n  this.render = function (renderCallback) {};\n\n};\n\nTHREE.ImmediateRenderObject.prototype = Object.create(THREE.Object3D.prototype);\nTHREE.ImmediateRenderObject.prototype.constructor = THREE.ImmediateRenderObject;\n\n// File:src/extras/objects/MorphBlendMesh.js\n\n/**\n * @author alteredq / http://alteredqualia.com/\n */\n\nTHREE.MorphBlendMesh = function (geometry, material) {\n\n  THREE.Mesh.call(this, geometry, material);\n\n  this.animationsMap = {};\n  this.animationsList = [];\n\n  // prepare default animation\n  // (all frames played together in 1 second)\n\n  var numFrames = this.geometry.morphTargets.length;\n\n  var name = \"__default\";\n\n  var startFrame = 0;\n  var endFrame = numFrames - 1;\n\n  var fps = numFrames / 1;\n\n  this.createAnimation(name, startFrame, endFrame, fps);\n  this.setAnimationWeight(name, 1);\n\n};\n\nTHREE.MorphBlendMesh.prototype = Object.create(THREE.Mesh.prototype);\nTHREE.MorphBlendMesh.prototype.constructor = THREE.MorphBlendMesh;\n\nTHREE.MorphBlendMesh.prototype.createAnimation = function (name, start, end, fps) {\n\n  var animation = {\n\n    startFrame: start,\n    endFrame: end,\n\n    length: end - start + 1,\n\n    fps: fps,\n    duration: (end - start) / fps,\n\n    lastFrame: 0,\n    currentFrame: 0,\n\n    active: false,\n\n    time: 0,\n    direction: 1,\n    weight: 1,\n\n    directionBackwards: false,\n    mirroredLoop: false };\n\n\n\n  this.animationsMap[name] = animation;\n  this.animationsList.push(animation);\n\n};\n\nTHREE.MorphBlendMesh.prototype.autoCreateAnimations = function (fps) {\n\n  var pattern = /([a-z]+)_?(\\d+)/;\n\n  var firstAnimation,frameRanges = {};\n\n  var geometry = this.geometry;\n\n  for (var i = 0, il = geometry.morphTargets.length; i < il; i++) {\n\n    var morph = geometry.morphTargets[i];\n    var chunks = morph.name.match(pattern);\n\n    if (chunks && chunks.length > 1) {\n\n      var name = chunks[1];\n\n      if (!frameRanges[name]) frameRanges[name] = { start: Infinity, end: -Infinity };\n\n      var range = frameRanges[name];\n\n      if (i < range.start) range.start = i;\n      if (i > range.end) range.end = i;\n\n      if (!firstAnimation) firstAnimation = name;\n\n    }\n\n  }\n\n  for (var name in frameRanges) {\n\n    var range = frameRanges[name];\n    this.createAnimation(name, range.start, range.end, fps);\n\n  }\n\n  this.firstAnimation = firstAnimation;\n\n};\n\nTHREE.MorphBlendMesh.prototype.setAnimationDirectionForward = function (name) {\n\n  var animation = this.animationsMap[name];\n\n  if (animation) {\n\n    animation.direction = 1;\n    animation.directionBackwards = false;\n\n  }\n\n};\n\nTHREE.MorphBlendMesh.prototype.setAnimationDirectionBackward = function (name) {\n\n  var animation = this.animationsMap[name];\n\n  if (animation) {\n\n    animation.direction = -1;\n    animation.directionBackwards = true;\n\n  }\n\n};\n\nTHREE.MorphBlendMesh.prototype.setAnimationFPS = function (name, fps) {\n\n  var animation = this.animationsMap[name];\n\n  if (animation) {\n\n    animation.fps = fps;\n    animation.duration = (animation.end - animation.start) / animation.fps;\n\n  }\n\n};\n\nTHREE.MorphBlendMesh.prototype.setAnimationDuration = function (name, duration) {\n\n  var animation = this.animationsMap[name];\n\n  if (animation) {\n\n    animation.duration = duration;\n    animation.fps = (animation.end - animation.start) / animation.duration;\n\n  }\n\n};\n\nTHREE.MorphBlendMesh.prototype.setAnimationWeight = function (name, weight) {\n\n  var animation = this.animationsMap[name];\n\n  if (animation) {\n\n    animation.weight = weight;\n\n  }\n\n};\n\nTHREE.MorphBlendMesh.prototype.setAnimationTime = function (name, time) {\n\n  var animation = this.animationsMap[name];\n\n  if (animation) {\n\n    animation.time = time;\n\n  }\n\n};\n\nTHREE.MorphBlendMesh.prototype.getAnimationTime = function (name) {\n\n  var time = 0;\n\n  var animation = this.animationsMap[name];\n\n  if (animation) {\n\n    time = animation.time;\n\n  }\n\n  return time;\n\n};\n\nTHREE.MorphBlendMesh.prototype.getAnimationDuration = function (name) {\n\n  var duration = -1;\n\n  var animation = this.animationsMap[name];\n\n  if (animation) {\n\n    duration = animation.duration;\n\n  }\n\n  return duration;\n\n};\n\nTHREE.MorphBlendMesh.prototype.playAnimation = function (name) {\n\n  var animation = this.animationsMap[name];\n\n  if (animation) {\n\n    animation.time = 0;\n    animation.active = true;\n\n  } else {\n\n    THREE.warn(\"THREE.MorphBlendMesh: animation[\" + name + \"] undefined in .playAnimation()\");\n\n  }\n\n};\n\nTHREE.MorphBlendMesh.prototype.stopAnimation = function (name) {\n\n  var animation = this.animationsMap[name];\n\n  if (animation) {\n\n    animation.active = false;\n\n  }\n\n};\n\nTHREE.MorphBlendMesh.prototype.update = function (delta) {\n\n  for (var i = 0, il = this.animationsList.length; i < il; i++) {\n\n    var animation = this.animationsList[i];\n\n    if (!animation.active) continue;\n\n    var frameTime = animation.duration / animation.length;\n\n    animation.time += animation.direction * delta;\n\n    if (animation.mirroredLoop) {\n\n      if (animation.time > animation.duration || animation.time < 0) {\n\n        animation.direction *= -1;\n\n        if (animation.time > animation.duration) {\n\n          animation.time = animation.duration;\n          animation.directionBackwards = true;\n\n        }\n\n        if (animation.time < 0) {\n\n          animation.time = 0;\n          animation.directionBackwards = false;\n\n        }\n\n      }\n\n    } else {\n\n      animation.time = animation.time % animation.duration;\n\n      if (animation.time < 0) animation.time += animation.duration;\n\n    }\n\n    var keyframe = animation.startFrame + THREE.Math.clamp(Math.floor(animation.time / frameTime), 0, animation.length - 1);\n    var weight = animation.weight;\n\n    if (keyframe !== animation.currentFrame) {\n\n      this.morphTargetInfluences[animation.lastFrame] = 0;\n      this.morphTargetInfluences[animation.currentFrame] = 1 * weight;\n\n      this.morphTargetInfluences[keyframe] = 0;\n\n      animation.lastFrame = animation.currentFrame;\n      animation.currentFrame = keyframe;\n\n    }\n\n    var mix = animation.time % frameTime / frameTime;\n\n    if (animation.directionBackwards) mix = 1 - mix;\n\n    this.morphTargetInfluences[animation.currentFrame] = mix * weight;\n    this.morphTargetInfluences[animation.lastFrame] = (1 - mix) * weight;\n\n  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